cxgbe(4): Fix "set but not used [-Wunused-but-set-variable]" warnings.

[FreeBSD/FreeBSD.git] / sys / dev / cxgbe / t4_main.c

/*-
 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
 *
 * Copyright (c) 2011 Chelsio Communications, Inc.
 * All rights reserved.
 * Written by: Navdeep Parhar <np@FreeBSD.org>
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");

#include "opt_ddb.h"
#include "opt_inet.h"
#include "opt_inet6.h"
#include "opt_kern_tls.h"
#include "opt_ratelimit.h"
#include "opt_rss.h"

#include <sys/param.h>
#include <sys/conf.h>
#include <sys/priv.h>
#include <sys/kernel.h>
#include <sys/bus.h>
#include <sys/eventhandler.h>
#include <sys/module.h>
#include <sys/malloc.h>
#include <sys/queue.h>
#include <sys/taskqueue.h>
#include <sys/pciio.h>
#include <dev/pci/pcireg.h>
#include <dev/pci/pcivar.h>
#include <dev/pci/pci_private.h>
#include <sys/firmware.h>
#include <sys/sbuf.h>
#include <sys/smp.h>
#include <sys/socket.h>
#include <sys/sockio.h>
#include <sys/sysctl.h>
#include <net/ethernet.h>
#include <net/if.h>
#include <net/if_types.h>
#include <net/if_dl.h>
#include <net/if_vlan_var.h>
#ifdef RSS
#include <net/rss_config.h>
#endif
#include <netinet/in.h>
#include <netinet/ip.h>
#ifdef KERN_TLS
#include <netinet/tcp_seq.h>
#endif
#if defined(__i386__) || defined(__amd64__)
#include <machine/md_var.h>
#include <machine/cputypes.h>
#include <vm/vm.h>
#include <vm/pmap.h>
#endif
#ifdef DDB
#include <ddb/ddb.h>
#include <ddb/db_lex.h>
#endif

#include "common/common.h"
#include "common/t4_msg.h"
#include "common/t4_regs.h"
#include "common/t4_regs_values.h"
#include "cudbg/cudbg.h"
#include "t4_clip.h"
#include "t4_ioctl.h"
#include "t4_l2t.h"
#include "t4_mp_ring.h"
#include "t4_if.h"
#include "t4_smt.h"

/* T4 bus driver interface */
static int t4_probe(device_t);
static int t4_attach(device_t);
static int t4_detach(device_t);
static int t4_child_location(device_t, device_t, struct sbuf *);
static int t4_ready(device_t);
static int t4_read_port_device(device_t, int, device_t *);
static int t4_suspend(device_t);
static int t4_resume(device_t);
static int t4_reset_prepare(device_t, device_t);
static int t4_reset_post(device_t, device_t);
static device_method_t t4_methods[] = {
        DEVMETHOD(device_probe,         t4_probe),
        DEVMETHOD(device_attach,        t4_attach),
        DEVMETHOD(device_detach,        t4_detach),
        DEVMETHOD(device_suspend,       t4_suspend),
        DEVMETHOD(device_resume,        t4_resume),

        DEVMETHOD(bus_child_location,   t4_child_location),
        DEVMETHOD(bus_reset_prepare,    t4_reset_prepare),
        DEVMETHOD(bus_reset_post,       t4_reset_post),

        DEVMETHOD(t4_is_main_ready,     t4_ready),
        DEVMETHOD(t4_read_port_device,  t4_read_port_device),

        DEVMETHOD_END
};
static driver_t t4_driver = {
        "t4nex",
        t4_methods,
        sizeof(struct adapter)
};


/* T4 port (cxgbe) interface */
static int cxgbe_probe(device_t);
static int cxgbe_attach(device_t);
static int cxgbe_detach(device_t);
device_method_t cxgbe_methods[] = {
        DEVMETHOD(device_probe,         cxgbe_probe),
        DEVMETHOD(device_attach,        cxgbe_attach),
        DEVMETHOD(device_detach,        cxgbe_detach),
        { 0, 0 }
};
static driver_t cxgbe_driver = {
        "cxgbe",
        cxgbe_methods,
        sizeof(struct port_info)
};

/* T4 VI (vcxgbe) interface */
static int vcxgbe_probe(device_t);
static int vcxgbe_attach(device_t);
static int vcxgbe_detach(device_t);
static device_method_t vcxgbe_methods[] = {
        DEVMETHOD(device_probe,         vcxgbe_probe),
        DEVMETHOD(device_attach,        vcxgbe_attach),
        DEVMETHOD(device_detach,        vcxgbe_detach),
        { 0, 0 }
};
static driver_t vcxgbe_driver = {
        "vcxgbe",
        vcxgbe_methods,
        sizeof(struct vi_info)
};

static d_ioctl_t t4_ioctl;

static struct cdevsw t4_cdevsw = {
       .d_version = D_VERSION,
       .d_ioctl = t4_ioctl,
       .d_name = "t4nex",
};

/* T5 bus driver interface */
static int t5_probe(device_t);
static device_method_t t5_methods[] = {
        DEVMETHOD(device_probe,         t5_probe),
        DEVMETHOD(device_attach,        t4_attach),
        DEVMETHOD(device_detach,        t4_detach),
        DEVMETHOD(device_suspend,       t4_suspend),
        DEVMETHOD(device_resume,        t4_resume),

        DEVMETHOD(bus_child_location,   t4_child_location),
        DEVMETHOD(bus_reset_prepare,    t4_reset_prepare),
        DEVMETHOD(bus_reset_post,       t4_reset_post),

        DEVMETHOD(t4_is_main_ready,     t4_ready),
        DEVMETHOD(t4_read_port_device,  t4_read_port_device),

        DEVMETHOD_END
};
static driver_t t5_driver = {
        "t5nex",
        t5_methods,
        sizeof(struct adapter)
};


/* T5 port (cxl) interface */
static driver_t cxl_driver = {
        "cxl",
        cxgbe_methods,
        sizeof(struct port_info)
};

/* T5 VI (vcxl) interface */
static driver_t vcxl_driver = {
        "vcxl",
        vcxgbe_methods,
        sizeof(struct vi_info)
};

/* T6 bus driver interface */
static int t6_probe(device_t);
static device_method_t t6_methods[] = {
        DEVMETHOD(device_probe,         t6_probe),
        DEVMETHOD(device_attach,        t4_attach),
        DEVMETHOD(device_detach,        t4_detach),
        DEVMETHOD(device_suspend,       t4_suspend),
        DEVMETHOD(device_resume,        t4_resume),

        DEVMETHOD(bus_child_location,   t4_child_location),
        DEVMETHOD(bus_reset_prepare,    t4_reset_prepare),
        DEVMETHOD(bus_reset_post,       t4_reset_post),

        DEVMETHOD(t4_is_main_ready,     t4_ready),
        DEVMETHOD(t4_read_port_device,  t4_read_port_device),

        DEVMETHOD_END
};
static driver_t t6_driver = {
        "t6nex",
        t6_methods,
        sizeof(struct adapter)
};


/* T6 port (cc) interface */
static driver_t cc_driver = {
        "cc",
        cxgbe_methods,
        sizeof(struct port_info)
};

/* T6 VI (vcc) interface */
static driver_t vcc_driver = {
        "vcc",
        vcxgbe_methods,
        sizeof(struct vi_info)
};

/* ifnet interface */
static void cxgbe_init(void *);
static int cxgbe_ioctl(struct ifnet *, unsigned long, caddr_t);
static int cxgbe_transmit(struct ifnet *, struct mbuf *);
static void cxgbe_qflush(struct ifnet *);
#if defined(KERN_TLS) || defined(RATELIMIT)
static int cxgbe_snd_tag_alloc(struct ifnet *, union if_snd_tag_alloc_params *,
    struct m_snd_tag **);
#endif

MALLOC_DEFINE(M_CXGBE, "cxgbe", "Chelsio T4/T5 Ethernet driver and services");

/*
 * Correct lock order when you need to acquire multiple locks is t4_list_lock,
 * then ADAPTER_LOCK, then t4_uld_list_lock.
 */
static struct sx t4_list_lock;
SLIST_HEAD(, adapter) t4_list;
#ifdef TCP_OFFLOAD
static struct sx t4_uld_list_lock;
SLIST_HEAD(, uld_info) t4_uld_list;
#endif

/*
 * Tunables.  See tweak_tunables() too.
 *
 * Each tunable is set to a default value here if it's known at compile-time.
 * Otherwise it is set to -n as an indication to tweak_tunables() that it should
 * provide a reasonable default (upto n) when the driver is loaded.
 *
 * Tunables applicable to both T4 and T5 are under hw.cxgbe.  Those specific to
 * T5 are under hw.cxl.
 */
SYSCTL_NODE(_hw, OID_AUTO, cxgbe, CTLFLAG_RD | CTLFLAG_MPSAFE, 0,
    "cxgbe(4) parameters");
SYSCTL_NODE(_hw, OID_AUTO, cxl, CTLFLAG_RD | CTLFLAG_MPSAFE, 0,
    "cxgbe(4) T5+ parameters");
SYSCTL_NODE(_hw_cxgbe, OID_AUTO, toe, CTLFLAG_RD | CTLFLAG_MPSAFE, 0,
    "cxgbe(4) TOE parameters");

/*
 * Number of queues for tx and rx, NIC and offload.
 */
#define NTXQ 16
int t4_ntxq = -NTXQ;
SYSCTL_INT(_hw_cxgbe, OID_AUTO, ntxq, CTLFLAG_RDTUN, &t4_ntxq, 0,
    "Number of TX queues per port");
TUNABLE_INT("hw.cxgbe.ntxq10g", &t4_ntxq);      /* Old name, undocumented */

#define NRXQ 8
int t4_nrxq = -NRXQ;
SYSCTL_INT(_hw_cxgbe, OID_AUTO, nrxq, CTLFLAG_RDTUN, &t4_nrxq, 0,
    "Number of RX queues per port");
TUNABLE_INT("hw.cxgbe.nrxq10g", &t4_nrxq);      /* Old name, undocumented */

#define NTXQ_VI 1
static int t4_ntxq_vi = -NTXQ_VI;
SYSCTL_INT(_hw_cxgbe, OID_AUTO, ntxq_vi, CTLFLAG_RDTUN, &t4_ntxq_vi, 0,
    "Number of TX queues per VI");

#define NRXQ_VI 1
static int t4_nrxq_vi = -NRXQ_VI;
SYSCTL_INT(_hw_cxgbe, OID_AUTO, nrxq_vi, CTLFLAG_RDTUN, &t4_nrxq_vi, 0,
    "Number of RX queues per VI");

static int t4_rsrv_noflowq = 0;
SYSCTL_INT(_hw_cxgbe, OID_AUTO, rsrv_noflowq, CTLFLAG_RDTUN, &t4_rsrv_noflowq,
    0, "Reserve TX queue 0 of each VI for non-flowid packets");

#if defined(TCP_OFFLOAD) || defined(RATELIMIT)
#define NOFLDTXQ 8
static int t4_nofldtxq = -NOFLDTXQ;
SYSCTL_INT(_hw_cxgbe, OID_AUTO, nofldtxq, CTLFLAG_RDTUN, &t4_nofldtxq, 0,
    "Number of offload TX queues per port");

#define NOFLDRXQ 2
static int t4_nofldrxq = -NOFLDRXQ;
SYSCTL_INT(_hw_cxgbe, OID_AUTO, nofldrxq, CTLFLAG_RDTUN, &t4_nofldrxq, 0,
    "Number of offload RX queues per port");

#define NOFLDTXQ_VI 1
static int t4_nofldtxq_vi = -NOFLDTXQ_VI;
SYSCTL_INT(_hw_cxgbe, OID_AUTO, nofldtxq_vi, CTLFLAG_RDTUN, &t4_nofldtxq_vi, 0,
    "Number of offload TX queues per VI");

#define NOFLDRXQ_VI 1
static int t4_nofldrxq_vi = -NOFLDRXQ_VI;
SYSCTL_INT(_hw_cxgbe, OID_AUTO, nofldrxq_vi, CTLFLAG_RDTUN, &t4_nofldrxq_vi, 0,
    "Number of offload RX queues per VI");

#define TMR_IDX_OFLD 1
int t4_tmr_idx_ofld = TMR_IDX_OFLD;
SYSCTL_INT(_hw_cxgbe, OID_AUTO, holdoff_timer_idx_ofld, CTLFLAG_RDTUN,
    &t4_tmr_idx_ofld, 0, "Holdoff timer index for offload queues");

#define PKTC_IDX_OFLD (-1)
int t4_pktc_idx_ofld = PKTC_IDX_OFLD;
SYSCTL_INT(_hw_cxgbe, OID_AUTO, holdoff_pktc_idx_ofld, CTLFLAG_RDTUN,
    &t4_pktc_idx_ofld, 0, "holdoff packet counter index for offload queues");

/* 0 means chip/fw default, non-zero number is value in microseconds */
static u_long t4_toe_keepalive_idle = 0;
SYSCTL_ULONG(_hw_cxgbe_toe, OID_AUTO, keepalive_idle, CTLFLAG_RDTUN,
    &t4_toe_keepalive_idle, 0, "TOE keepalive idle timer (us)");

/* 0 means chip/fw default, non-zero number is value in microseconds */
static u_long t4_toe_keepalive_interval = 0;
SYSCTL_ULONG(_hw_cxgbe_toe, OID_AUTO, keepalive_interval, CTLFLAG_RDTUN,
    &t4_toe_keepalive_interval, 0, "TOE keepalive interval timer (us)");

/* 0 means chip/fw default, non-zero number is # of keepalives before abort */
static int t4_toe_keepalive_count = 0;
SYSCTL_INT(_hw_cxgbe_toe, OID_AUTO, keepalive_count, CTLFLAG_RDTUN,
    &t4_toe_keepalive_count, 0, "Number of TOE keepalive probes before abort");

/* 0 means chip/fw default, non-zero number is value in microseconds */
static u_long t4_toe_rexmt_min = 0;
SYSCTL_ULONG(_hw_cxgbe_toe, OID_AUTO, rexmt_min, CTLFLAG_RDTUN,
    &t4_toe_rexmt_min, 0, "Minimum TOE retransmit interval (us)");

/* 0 means chip/fw default, non-zero number is value in microseconds */
static u_long t4_toe_rexmt_max = 0;
SYSCTL_ULONG(_hw_cxgbe_toe, OID_AUTO, rexmt_max, CTLFLAG_RDTUN,
    &t4_toe_rexmt_max, 0, "Maximum TOE retransmit interval (us)");

/* 0 means chip/fw default, non-zero number is # of rexmt before abort */
static int t4_toe_rexmt_count = 0;
SYSCTL_INT(_hw_cxgbe_toe, OID_AUTO, rexmt_count, CTLFLAG_RDTUN,
    &t4_toe_rexmt_count, 0, "Number of TOE retransmissions before abort");

/* -1 means chip/fw default, other values are raw backoff values to use */
static int t4_toe_rexmt_backoff[16] = {
        -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1
};
SYSCTL_NODE(_hw_cxgbe_toe, OID_AUTO, rexmt_backoff,
    CTLFLAG_RD | CTLFLAG_MPSAFE, 0,
    "cxgbe(4) TOE retransmit backoff values");
SYSCTL_INT(_hw_cxgbe_toe_rexmt_backoff, OID_AUTO, 0, CTLFLAG_RDTUN,
    &t4_toe_rexmt_backoff[0], 0, "");
SYSCTL_INT(_hw_cxgbe_toe_rexmt_backoff, OID_AUTO, 1, CTLFLAG_RDTUN,
    &t4_toe_rexmt_backoff[1], 0, "");
SYSCTL_INT(_hw_cxgbe_toe_rexmt_backoff, OID_AUTO, 2, CTLFLAG_RDTUN,
    &t4_toe_rexmt_backoff[2], 0, "");
SYSCTL_INT(_hw_cxgbe_toe_rexmt_backoff, OID_AUTO, 3, CTLFLAG_RDTUN,
    &t4_toe_rexmt_backoff[3], 0, "");
SYSCTL_INT(_hw_cxgbe_toe_rexmt_backoff, OID_AUTO, 4, CTLFLAG_RDTUN,
    &t4_toe_rexmt_backoff[4], 0, "");
SYSCTL_INT(_hw_cxgbe_toe_rexmt_backoff, OID_AUTO, 5, CTLFLAG_RDTUN,
    &t4_toe_rexmt_backoff[5], 0, "");
SYSCTL_INT(_hw_cxgbe_toe_rexmt_backoff, OID_AUTO, 6, CTLFLAG_RDTUN,
    &t4_toe_rexmt_backoff[6], 0, "");
SYSCTL_INT(_hw_cxgbe_toe_rexmt_backoff, OID_AUTO, 7, CTLFLAG_RDTUN,
    &t4_toe_rexmt_backoff[7], 0, "");
SYSCTL_INT(_hw_cxgbe_toe_rexmt_backoff, OID_AUTO, 8, CTLFLAG_RDTUN,
    &t4_toe_rexmt_backoff[8], 0, "");
SYSCTL_INT(_hw_cxgbe_toe_rexmt_backoff, OID_AUTO, 9, CTLFLAG_RDTUN,
    &t4_toe_rexmt_backoff[9], 0, "");
SYSCTL_INT(_hw_cxgbe_toe_rexmt_backoff, OID_AUTO, 10, CTLFLAG_RDTUN,
    &t4_toe_rexmt_backoff[10], 0, "");
SYSCTL_INT(_hw_cxgbe_toe_rexmt_backoff, OID_AUTO, 11, CTLFLAG_RDTUN,
    &t4_toe_rexmt_backoff[11], 0, "");
SYSCTL_INT(_hw_cxgbe_toe_rexmt_backoff, OID_AUTO, 12, CTLFLAG_RDTUN,
    &t4_toe_rexmt_backoff[12], 0, "");
SYSCTL_INT(_hw_cxgbe_toe_rexmt_backoff, OID_AUTO, 13, CTLFLAG_RDTUN,
    &t4_toe_rexmt_backoff[13], 0, "");
SYSCTL_INT(_hw_cxgbe_toe_rexmt_backoff, OID_AUTO, 14, CTLFLAG_RDTUN,
    &t4_toe_rexmt_backoff[14], 0, "");
SYSCTL_INT(_hw_cxgbe_toe_rexmt_backoff, OID_AUTO, 15, CTLFLAG_RDTUN,
    &t4_toe_rexmt_backoff[15], 0, "");

static int t4_toe_tls_rx_timeout = 5;
SYSCTL_INT(_hw_cxgbe_toe, OID_AUTO, tls_rx_timeout, CTLFLAG_RDTUN,
    &t4_toe_tls_rx_timeout, 0,
    "Timeout in seconds to downgrade TLS sockets to plain TOE");
#endif

#ifdef DEV_NETMAP
#define NN_MAIN_VI      (1 << 0)        /* Native netmap on the main VI */
#define NN_EXTRA_VI     (1 << 1)        /* Native netmap on the extra VI(s) */
static int t4_native_netmap = NN_EXTRA_VI;
SYSCTL_INT(_hw_cxgbe, OID_AUTO, native_netmap, CTLFLAG_RDTUN, &t4_native_netmap,
    0, "Native netmap support.  bit 0 = main VI, bit 1 = extra VIs");

#define NNMTXQ 8
static int t4_nnmtxq = -NNMTXQ;
SYSCTL_INT(_hw_cxgbe, OID_AUTO, nnmtxq, CTLFLAG_RDTUN, &t4_nnmtxq, 0,
    "Number of netmap TX queues");

#define NNMRXQ 8
static int t4_nnmrxq = -NNMRXQ;
SYSCTL_INT(_hw_cxgbe, OID_AUTO, nnmrxq, CTLFLAG_RDTUN, &t4_nnmrxq, 0,
    "Number of netmap RX queues");

#define NNMTXQ_VI 2
static int t4_nnmtxq_vi = -NNMTXQ_VI;
SYSCTL_INT(_hw_cxgbe, OID_AUTO, nnmtxq_vi, CTLFLAG_RDTUN, &t4_nnmtxq_vi, 0,
    "Number of netmap TX queues per VI");

#define NNMRXQ_VI 2
static int t4_nnmrxq_vi = -NNMRXQ_VI;
SYSCTL_INT(_hw_cxgbe, OID_AUTO, nnmrxq_vi, CTLFLAG_RDTUN, &t4_nnmrxq_vi, 0,
    "Number of netmap RX queues per VI");
#endif

/*
 * Holdoff parameters for ports.
 */
#define TMR_IDX 1
int t4_tmr_idx = TMR_IDX;
SYSCTL_INT(_hw_cxgbe, OID_AUTO, holdoff_timer_idx, CTLFLAG_RDTUN, &t4_tmr_idx,
    0, "Holdoff timer index");
TUNABLE_INT("hw.cxgbe.holdoff_timer_idx_10G", &t4_tmr_idx);     /* Old name */

#define PKTC_IDX (-1)
int t4_pktc_idx = PKTC_IDX;
SYSCTL_INT(_hw_cxgbe, OID_AUTO, holdoff_pktc_idx, CTLFLAG_RDTUN, &t4_pktc_idx,
    0, "Holdoff packet counter index");
TUNABLE_INT("hw.cxgbe.holdoff_pktc_idx_10G", &t4_pktc_idx);     /* Old name */

/*
 * Size (# of entries) of each tx and rx queue.
 */
unsigned int t4_qsize_txq = TX_EQ_QSIZE;
SYSCTL_INT(_hw_cxgbe, OID_AUTO, qsize_txq, CTLFLAG_RDTUN, &t4_qsize_txq, 0,
    "Number of descriptors in each TX queue");

unsigned int t4_qsize_rxq = RX_IQ_QSIZE;
SYSCTL_INT(_hw_cxgbe, OID_AUTO, qsize_rxq, CTLFLAG_RDTUN, &t4_qsize_rxq, 0,
    "Number of descriptors in each RX queue");

/*
 * Interrupt types allowed (bits 0, 1, 2 = INTx, MSI, MSI-X respectively).
 */
int t4_intr_types = INTR_MSIX | INTR_MSI | INTR_INTX;
SYSCTL_INT(_hw_cxgbe, OID_AUTO, interrupt_types, CTLFLAG_RDTUN, &t4_intr_types,
    0, "Interrupt types allowed (bit 0 = INTx, 1 = MSI, 2 = MSI-X)");

/*
 * Configuration file.  All the _CF names here are special.
 */
#define DEFAULT_CF      "default"
#define BUILTIN_CF      "built-in"
#define FLASH_CF        "flash"
#define UWIRE_CF        "uwire"
#define FPGA_CF         "fpga"
static char t4_cfg_file[32] = DEFAULT_CF;
SYSCTL_STRING(_hw_cxgbe, OID_AUTO, config_file, CTLFLAG_RDTUN, t4_cfg_file,
    sizeof(t4_cfg_file), "Firmware configuration file");

/*
 * PAUSE settings (bit 0, 1, 2 = rx_pause, tx_pause, pause_autoneg respectively).
 * rx_pause = 1 to heed incoming PAUSE frames, 0 to ignore them.
 * tx_pause = 1 to emit PAUSE frames when the rx FIFO reaches its high water
 *            mark or when signalled to do so, 0 to never emit PAUSE.
 * pause_autoneg = 1 means PAUSE will be negotiated if possible and the
 *                 negotiated settings will override rx_pause/tx_pause.
 *                 Otherwise rx_pause/tx_pause are applied forcibly.
 */
static int t4_pause_settings = PAUSE_RX | PAUSE_TX | PAUSE_AUTONEG;
SYSCTL_INT(_hw_cxgbe, OID_AUTO, pause_settings, CTLFLAG_RDTUN,
    &t4_pause_settings, 0,
    "PAUSE settings (bit 0 = rx_pause, 1 = tx_pause, 2 = pause_autoneg)");

/*
 * Forward Error Correction settings (bit 0, 1 = RS, BASER respectively).
 * -1 to run with the firmware default.  Same as FEC_AUTO (bit 5)
 *  0 to disable FEC.
 */
static int t4_fec = -1;
SYSCTL_INT(_hw_cxgbe, OID_AUTO, fec, CTLFLAG_RDTUN, &t4_fec, 0,
    "Forward Error Correction (bit 0 = RS, bit 1 = BASER_RS)");

/*
 * Controls when the driver sets the FORCE_FEC bit in the L1_CFG32 that it
 * issues to the firmware.  If the firmware doesn't support FORCE_FEC then the
 * driver runs as if this is set to 0.
 * -1 to set FORCE_FEC iff requested_fec != AUTO. Multiple FEC bits are okay.
 *  0 to never set FORCE_FEC. requested_fec = AUTO means use the hint from the
 *    transceiver. Multiple FEC bits may not be okay but will be passed on to
 *    the firmware anyway (may result in l1cfg errors with old firmwares).
 *  1 to always set FORCE_FEC. Multiple FEC bits are okay. requested_fec = AUTO
 *    means set all FEC bits that are valid for the speed.
 */
static int t4_force_fec = -1;
SYSCTL_INT(_hw_cxgbe, OID_AUTO, force_fec, CTLFLAG_RDTUN, &t4_force_fec, 0,
    "Controls the use of FORCE_FEC bit in L1 configuration.");

/*
 * Link autonegotiation.
 * -1 to run with the firmware default.
 *  0 to disable.
 *  1 to enable.
 */
static int t4_autoneg = -1;
SYSCTL_INT(_hw_cxgbe, OID_AUTO, autoneg, CTLFLAG_RDTUN, &t4_autoneg, 0,
    "Link autonegotiation");

/*
 * Firmware auto-install by driver during attach (0, 1, 2 = prohibited, allowed,
 * encouraged respectively).  '-n' is the same as 'n' except the firmware
 * version used in the checks is read from the firmware bundled with the driver.
 */
static int t4_fw_install = 1;
SYSCTL_INT(_hw_cxgbe, OID_AUTO, fw_install, CTLFLAG_RDTUN, &t4_fw_install, 0,
    "Firmware auto-install (0 = prohibited, 1 = allowed, 2 = encouraged)");

/*
 * ASIC features that will be used.  Disable the ones you don't want so that the
 * chip resources aren't wasted on features that will not be used.
 */
static int t4_nbmcaps_allowed = 0;
SYSCTL_INT(_hw_cxgbe, OID_AUTO, nbmcaps_allowed, CTLFLAG_RDTUN,
    &t4_nbmcaps_allowed, 0, "Default NBM capabilities");

static int t4_linkcaps_allowed = 0;     /* No DCBX, PPP, etc. by default */
SYSCTL_INT(_hw_cxgbe, OID_AUTO, linkcaps_allowed, CTLFLAG_RDTUN,
    &t4_linkcaps_allowed, 0, "Default link capabilities");

static int t4_switchcaps_allowed = FW_CAPS_CONFIG_SWITCH_INGRESS |
    FW_CAPS_CONFIG_SWITCH_EGRESS;
SYSCTL_INT(_hw_cxgbe, OID_AUTO, switchcaps_allowed, CTLFLAG_RDTUN,
    &t4_switchcaps_allowed, 0, "Default switch capabilities");

#ifdef RATELIMIT
static int t4_niccaps_allowed = FW_CAPS_CONFIG_NIC |
        FW_CAPS_CONFIG_NIC_HASHFILTER | FW_CAPS_CONFIG_NIC_ETHOFLD;
#else
static int t4_niccaps_allowed = FW_CAPS_CONFIG_NIC |
        FW_CAPS_CONFIG_NIC_HASHFILTER;
#endif
SYSCTL_INT(_hw_cxgbe, OID_AUTO, niccaps_allowed, CTLFLAG_RDTUN,
    &t4_niccaps_allowed, 0, "Default NIC capabilities");

static int t4_toecaps_allowed = -1;
SYSCTL_INT(_hw_cxgbe, OID_AUTO, toecaps_allowed, CTLFLAG_RDTUN,
    &t4_toecaps_allowed, 0, "Default TCP offload capabilities");

static int t4_rdmacaps_allowed = -1;
SYSCTL_INT(_hw_cxgbe, OID_AUTO, rdmacaps_allowed, CTLFLAG_RDTUN,
    &t4_rdmacaps_allowed, 0, "Default RDMA capabilities");

static int t4_cryptocaps_allowed = -1;
SYSCTL_INT(_hw_cxgbe, OID_AUTO, cryptocaps_allowed, CTLFLAG_RDTUN,
    &t4_cryptocaps_allowed, 0, "Default crypto capabilities");

static int t4_iscsicaps_allowed = -1;
SYSCTL_INT(_hw_cxgbe, OID_AUTO, iscsicaps_allowed, CTLFLAG_RDTUN,
    &t4_iscsicaps_allowed, 0, "Default iSCSI capabilities");

static int t4_fcoecaps_allowed = 0;
SYSCTL_INT(_hw_cxgbe, OID_AUTO, fcoecaps_allowed, CTLFLAG_RDTUN,
    &t4_fcoecaps_allowed, 0, "Default FCoE capabilities");

static int t5_write_combine = 0;
SYSCTL_INT(_hw_cxl, OID_AUTO, write_combine, CTLFLAG_RDTUN, &t5_write_combine,
    0, "Use WC instead of UC for BAR2");

static int t4_num_vis = 1;
SYSCTL_INT(_hw_cxgbe, OID_AUTO, num_vis, CTLFLAG_RDTUN, &t4_num_vis, 0,
    "Number of VIs per port");

/*
 * PCIe Relaxed Ordering.
 * -1: driver should figure out a good value.
 * 0: disable RO.
 * 1: enable RO.
 * 2: leave RO alone.
 */
static int pcie_relaxed_ordering = -1;
SYSCTL_INT(_hw_cxgbe, OID_AUTO, pcie_relaxed_ordering, CTLFLAG_RDTUN,
    &pcie_relaxed_ordering, 0,
    "PCIe Relaxed Ordering: 0 = disable, 1 = enable, 2 = leave alone");

static int t4_panic_on_fatal_err = 0;
SYSCTL_INT(_hw_cxgbe, OID_AUTO, panic_on_fatal_err, CTLFLAG_RWTUN,
    &t4_panic_on_fatal_err, 0, "panic on fatal errors");

static int t4_reset_on_fatal_err = 0;
SYSCTL_INT(_hw_cxgbe, OID_AUTO, reset_on_fatal_err, CTLFLAG_RWTUN,
    &t4_reset_on_fatal_err, 0, "reset adapter on fatal errors");

static int t4_tx_vm_wr = 0;
SYSCTL_INT(_hw_cxgbe, OID_AUTO, tx_vm_wr, CTLFLAG_RWTUN, &t4_tx_vm_wr, 0,
    "Use VM work requests to transmit packets.");

/*
 * Set to non-zero to enable the attack filter.  A packet that matches any of
 * these conditions will get dropped on ingress:
 * 1) IP && source address == destination address.
 * 2) TCP/IP && source address is not a unicast address.
 * 3) TCP/IP && destination address is not a unicast address.
 * 4) IP && source address is loopback (127.x.y.z).
 * 5) IP && destination address is loopback (127.x.y.z).
 * 6) IPv6 && source address == destination address.
 * 7) IPv6 && source address is not a unicast address.
 * 8) IPv6 && source address is loopback (::1/128).
 * 9) IPv6 && destination address is loopback (::1/128).
 * 10) IPv6 && source address is unspecified (::/128).
 * 11) IPv6 && destination address is unspecified (::/128).
 * 12) TCP/IPv6 && source address is multicast (ff00::/8).
 * 13) TCP/IPv6 && destination address is multicast (ff00::/8).
 */
static int t4_attack_filter = 0;
SYSCTL_INT(_hw_cxgbe, OID_AUTO, attack_filter, CTLFLAG_RDTUN,
    &t4_attack_filter, 0, "Drop suspicious traffic");

static int t4_drop_ip_fragments = 0;
SYSCTL_INT(_hw_cxgbe, OID_AUTO, drop_ip_fragments, CTLFLAG_RDTUN,
    &t4_drop_ip_fragments, 0, "Drop IP fragments");

static int t4_drop_pkts_with_l2_errors = 1;
SYSCTL_INT(_hw_cxgbe, OID_AUTO, drop_pkts_with_l2_errors, CTLFLAG_RDTUN,
    &t4_drop_pkts_with_l2_errors, 0,
    "Drop all frames with Layer 2 length or checksum errors");

static int t4_drop_pkts_with_l3_errors = 0;
SYSCTL_INT(_hw_cxgbe, OID_AUTO, drop_pkts_with_l3_errors, CTLFLAG_RDTUN,
    &t4_drop_pkts_with_l3_errors, 0,
    "Drop all frames with IP version, length, or checksum errors");

static int t4_drop_pkts_with_l4_errors = 0;
SYSCTL_INT(_hw_cxgbe, OID_AUTO, drop_pkts_with_l4_errors, CTLFLAG_RDTUN,
    &t4_drop_pkts_with_l4_errors, 0,
    "Drop all frames with Layer 4 length, checksum, or other errors");

#ifdef TCP_OFFLOAD
/*
 * TOE tunables.
 */
static int t4_cop_managed_offloading = 0;
SYSCTL_INT(_hw_cxgbe, OID_AUTO, cop_managed_offloading, CTLFLAG_RDTUN,
    &t4_cop_managed_offloading, 0,
    "COP (Connection Offload Policy) controls all TOE offload");
#endif

#ifdef KERN_TLS
/*
 * This enables KERN_TLS for all adapters if set.
 */
static int t4_kern_tls = 0;
SYSCTL_INT(_hw_cxgbe, OID_AUTO, kern_tls, CTLFLAG_RDTUN, &t4_kern_tls, 0,
    "Enable KERN_TLS mode for all supported adapters");

SYSCTL_NODE(_hw_cxgbe, OID_AUTO, tls, CTLFLAG_RD | CTLFLAG_MPSAFE, 0,
    "cxgbe(4) KERN_TLS parameters");

static int t4_tls_inline_keys = 0;
SYSCTL_INT(_hw_cxgbe_tls, OID_AUTO, inline_keys, CTLFLAG_RDTUN,
    &t4_tls_inline_keys, 0,
    "Always pass TLS keys in work requests (1) or attempt to store TLS keys "
    "in card memory.");

static int t4_tls_combo_wrs = 0;
SYSCTL_INT(_hw_cxgbe_tls, OID_AUTO, combo_wrs, CTLFLAG_RDTUN, &t4_tls_combo_wrs,
    0, "Attempt to combine TCB field updates with TLS record work requests.");
#endif

/* Functions used by VIs to obtain unique MAC addresses for each VI. */
static int vi_mac_funcs[] = {
        FW_VI_FUNC_ETH,
        FW_VI_FUNC_OFLD,
        FW_VI_FUNC_IWARP,
        FW_VI_FUNC_OPENISCSI,
        FW_VI_FUNC_OPENFCOE,
        FW_VI_FUNC_FOISCSI,
        FW_VI_FUNC_FOFCOE,
};

struct intrs_and_queues {
        uint16_t intr_type;     /* INTx, MSI, or MSI-X */
        uint16_t num_vis;       /* number of VIs for each port */
        uint16_t nirq;          /* Total # of vectors */
        uint16_t ntxq;          /* # of NIC txq's for each port */
        uint16_t nrxq;          /* # of NIC rxq's for each port */
        uint16_t nofldtxq;      /* # of TOE/ETHOFLD txq's for each port */
        uint16_t nofldrxq;      /* # of TOE rxq's for each port */
        uint16_t nnmtxq;        /* # of netmap txq's */
        uint16_t nnmrxq;        /* # of netmap rxq's */

        /* The vcxgbe/vcxl interfaces use these and not the ones above. */
        uint16_t ntxq_vi;       /* # of NIC txq's */
        uint16_t nrxq_vi;       /* # of NIC rxq's */
        uint16_t nofldtxq_vi;   /* # of TOE txq's */
        uint16_t nofldrxq_vi;   /* # of TOE rxq's */
        uint16_t nnmtxq_vi;     /* # of netmap txq's */
        uint16_t nnmrxq_vi;     /* # of netmap rxq's */
};

static void setup_memwin(struct adapter *);
static void position_memwin(struct adapter *, int, uint32_t);
static int validate_mem_range(struct adapter *, uint32_t, uint32_t);
static int fwmtype_to_hwmtype(int);
static int validate_mt_off_len(struct adapter *, int, uint32_t, uint32_t,
    uint32_t *);
static int fixup_devlog_params(struct adapter *);
static int cfg_itype_and_nqueues(struct adapter *, struct intrs_and_queues *);
static int contact_firmware(struct adapter *);
static int partition_resources(struct adapter *);
static int get_params__pre_init(struct adapter *);
static int set_params__pre_init(struct adapter *);
static int get_params__post_init(struct adapter *);
static int set_params__post_init(struct adapter *);
static void t4_set_desc(struct adapter *);
static bool fixed_ifmedia(struct port_info *);
static void build_medialist(struct port_info *);
static void init_link_config(struct port_info *);
static int fixup_link_config(struct port_info *);
static int apply_link_config(struct port_info *);
static int cxgbe_init_synchronized(struct vi_info *);
static int cxgbe_uninit_synchronized(struct vi_info *);
static int adapter_full_init(struct adapter *);
static void adapter_full_uninit(struct adapter *);
static int vi_full_init(struct vi_info *);
static void vi_full_uninit(struct vi_info *);
static int alloc_extra_vi(struct adapter *, struct port_info *, struct vi_info *);
static void quiesce_txq(struct sge_txq *);
static void quiesce_wrq(struct sge_wrq *);
static void quiesce_iq_fl(struct adapter *, struct sge_iq *, struct sge_fl *);
static void quiesce_vi(struct vi_info *);
static int t4_alloc_irq(struct adapter *, struct irq *, int rid,
    driver_intr_t *, void *, char *);
static int t4_free_irq(struct adapter *, struct irq *);
static void t4_init_atid_table(struct adapter *);
static void t4_free_atid_table(struct adapter *);
static void get_regs(struct adapter *, struct t4_regdump *, uint8_t *);
static void vi_refresh_stats(struct vi_info *);
static void cxgbe_refresh_stats(struct vi_info *);
static void cxgbe_tick(void *);
static void vi_tick(void *);
static void cxgbe_sysctls(struct port_info *);
static int sysctl_int_array(SYSCTL_HANDLER_ARGS);
static int sysctl_bitfield_8b(SYSCTL_HANDLER_ARGS);
static int sysctl_bitfield_16b(SYSCTL_HANDLER_ARGS);
static int sysctl_btphy(SYSCTL_HANDLER_ARGS);
static int sysctl_noflowq(SYSCTL_HANDLER_ARGS);
static int sysctl_tx_vm_wr(SYSCTL_HANDLER_ARGS);
static int sysctl_holdoff_tmr_idx(SYSCTL_HANDLER_ARGS);
static int sysctl_holdoff_pktc_idx(SYSCTL_HANDLER_ARGS);
static int sysctl_qsize_rxq(SYSCTL_HANDLER_ARGS);
static int sysctl_qsize_txq(SYSCTL_HANDLER_ARGS);
static int sysctl_pause_settings(SYSCTL_HANDLER_ARGS);
static int sysctl_link_fec(SYSCTL_HANDLER_ARGS);
static int sysctl_requested_fec(SYSCTL_HANDLER_ARGS);
static int sysctl_module_fec(SYSCTL_HANDLER_ARGS);
static int sysctl_autoneg(SYSCTL_HANDLER_ARGS);
static int sysctl_force_fec(SYSCTL_HANDLER_ARGS);
static int sysctl_handle_t4_reg64(SYSCTL_HANDLER_ARGS);
static int sysctl_temperature(SYSCTL_HANDLER_ARGS);
static int sysctl_vdd(SYSCTL_HANDLER_ARGS);
static int sysctl_reset_sensor(SYSCTL_HANDLER_ARGS);
static int sysctl_loadavg(SYSCTL_HANDLER_ARGS);
static int sysctl_cctrl(SYSCTL_HANDLER_ARGS);
static int sysctl_cim_ibq_obq(SYSCTL_HANDLER_ARGS);
static int sysctl_cim_la(SYSCTL_HANDLER_ARGS);
static int sysctl_cim_ma_la(SYSCTL_HANDLER_ARGS);
static int sysctl_cim_pif_la(SYSCTL_HANDLER_ARGS);
static int sysctl_cim_qcfg(SYSCTL_HANDLER_ARGS);
static int sysctl_cpl_stats(SYSCTL_HANDLER_ARGS);
static int sysctl_ddp_stats(SYSCTL_HANDLER_ARGS);
static int sysctl_tid_stats(SYSCTL_HANDLER_ARGS);
static int sysctl_devlog(SYSCTL_HANDLER_ARGS);
static int sysctl_fcoe_stats(SYSCTL_HANDLER_ARGS);
static int sysctl_hw_sched(SYSCTL_HANDLER_ARGS);
static int sysctl_lb_stats(SYSCTL_HANDLER_ARGS);
static int sysctl_linkdnrc(SYSCTL_HANDLER_ARGS);
static int sysctl_meminfo(SYSCTL_HANDLER_ARGS);
static int sysctl_mps_tcam(SYSCTL_HANDLER_ARGS);
static int sysctl_mps_tcam_t6(SYSCTL_HANDLER_ARGS);
static int sysctl_path_mtus(SYSCTL_HANDLER_ARGS);
static int sysctl_pm_stats(SYSCTL_HANDLER_ARGS);
static int sysctl_rdma_stats(SYSCTL_HANDLER_ARGS);
static int sysctl_tcp_stats(SYSCTL_HANDLER_ARGS);
static int sysctl_tids(SYSCTL_HANDLER_ARGS);
static int sysctl_tp_err_stats(SYSCTL_HANDLER_ARGS);
static int sysctl_tnl_stats(SYSCTL_HANDLER_ARGS);
static int sysctl_tp_la_mask(SYSCTL_HANDLER_ARGS);
static int sysctl_tp_la(SYSCTL_HANDLER_ARGS);
static int sysctl_tx_rate(SYSCTL_HANDLER_ARGS);
static int sysctl_ulprx_la(SYSCTL_HANDLER_ARGS);
static int sysctl_wcwr_stats(SYSCTL_HANDLER_ARGS);
static int sysctl_cpus(SYSCTL_HANDLER_ARGS);
static int sysctl_reset(SYSCTL_HANDLER_ARGS);
#ifdef TCP_OFFLOAD
static int sysctl_tls(SYSCTL_HANDLER_ARGS);
static int sysctl_tls_rx_ports(SYSCTL_HANDLER_ARGS);
static int sysctl_tls_rx_timeout(SYSCTL_HANDLER_ARGS);
static int sysctl_tp_tick(SYSCTL_HANDLER_ARGS);
static int sysctl_tp_dack_timer(SYSCTL_HANDLER_ARGS);
static int sysctl_tp_timer(SYSCTL_HANDLER_ARGS);
static int sysctl_tp_shift_cnt(SYSCTL_HANDLER_ARGS);
static int sysctl_tp_backoff(SYSCTL_HANDLER_ARGS);
static int sysctl_holdoff_tmr_idx_ofld(SYSCTL_HANDLER_ARGS);
static int sysctl_holdoff_pktc_idx_ofld(SYSCTL_HANDLER_ARGS);
#endif
static int get_sge_context(struct adapter *, struct t4_sge_context *);
static int load_fw(struct adapter *, struct t4_data *);
static int load_cfg(struct adapter *, struct t4_data *);
static int load_boot(struct adapter *, struct t4_bootrom *);
static int load_bootcfg(struct adapter *, struct t4_data *);
static int cudbg_dump(struct adapter *, struct t4_cudbg_dump *);
static void free_offload_policy(struct t4_offload_policy *);
static int set_offload_policy(struct adapter *, struct t4_offload_policy *);
static int read_card_mem(struct adapter *, int, struct t4_mem_range *);
static int read_i2c(struct adapter *, struct t4_i2c_data *);
static int clear_stats(struct adapter *, u_int);
static int hold_clip_addr(struct adapter *, struct t4_clip_addr *);
static int release_clip_addr(struct adapter *, struct t4_clip_addr *);
#ifdef TCP_OFFLOAD
static int toe_capability(struct vi_info *, bool);
static void t4_async_event(void *, int);
#endif
#ifdef KERN_TLS
static int ktls_capability(struct adapter *, bool);
#endif
static int mod_event(module_t, int, void *);
static int notify_siblings(device_t, int);
static uint64_t vi_get_counter(struct ifnet *, ift_counter);
static uint64_t cxgbe_get_counter(struct ifnet *, ift_counter);
static void enable_vxlan_rx(struct adapter *);
static void reset_adapter(void *, int);

struct {
        uint16_t device;
        char *desc;
} t4_pciids[] = {
        {0xa000, "Chelsio Terminator 4 FPGA"},
        {0x4400, "Chelsio T440-dbg"},
        {0x4401, "Chelsio T420-CR"},
        {0x4402, "Chelsio T422-CR"},
        {0x4403, "Chelsio T440-CR"},
        {0x4404, "Chelsio T420-BCH"},
        {0x4405, "Chelsio T440-BCH"},
        {0x4406, "Chelsio T440-CH"},
        {0x4407, "Chelsio T420-SO"},
        {0x4408, "Chelsio T420-CX"},
        {0x4409, "Chelsio T420-BT"},
        {0x440a, "Chelsio T404-BT"},
        {0x440e, "Chelsio T440-LP-CR"},
}, t5_pciids[] = {
        {0xb000, "Chelsio Terminator 5 FPGA"},
        {0x5400, "Chelsio T580-dbg"},
        {0x5401,  "Chelsio T520-CR"},           /* 2 x 10G */
        {0x5402,  "Chelsio T522-CR"},           /* 2 x 10G, 2 X 1G */
        {0x5403,  "Chelsio T540-CR"},           /* 4 x 10G */
        {0x5407,  "Chelsio T520-SO"},           /* 2 x 10G, nomem */
        {0x5409,  "Chelsio T520-BT"},           /* 2 x 10GBaseT */
        {0x540a,  "Chelsio T504-BT"},           /* 4 x 1G */
        {0x540d,  "Chelsio T580-CR"},           /* 2 x 40G */
        {0x540e,  "Chelsio T540-LP-CR"},        /* 4 x 10G */
        {0x5410,  "Chelsio T580-LP-CR"},        /* 2 x 40G */
        {0x5411,  "Chelsio T520-LL-CR"},        /* 2 x 10G */
        {0x5412,  "Chelsio T560-CR"},           /* 1 x 40G, 2 x 10G */
        {0x5414,  "Chelsio T580-LP-SO-CR"},     /* 2 x 40G, nomem */
        {0x5415,  "Chelsio T502-BT"},           /* 2 x 1G */
        {0x5418,  "Chelsio T540-BT"},           /* 4 x 10GBaseT */
        {0x5419,  "Chelsio T540-LP-BT"},        /* 4 x 10GBaseT */
        {0x541a,  "Chelsio T540-SO-BT"},        /* 4 x 10GBaseT, nomem */
        {0x541b,  "Chelsio T540-SO-CR"},        /* 4 x 10G, nomem */

        /* Custom */
        {0x5483, "Custom T540-CR"},
        {0x5484, "Custom T540-BT"},
}, t6_pciids[] = {
        {0xc006, "Chelsio Terminator 6 FPGA"},  /* T6 PE10K6 FPGA (PF0) */
        {0x6400, "Chelsio T6-DBG-25"},          /* 2 x 10/25G, debug */
        {0x6401, "Chelsio T6225-CR"},           /* 2 x 10/25G */
        {0x6402, "Chelsio T6225-SO-CR"},        /* 2 x 10/25G, nomem */
        {0x6403, "Chelsio T6425-CR"},           /* 4 x 10/25G */
        {0x6404, "Chelsio T6425-SO-CR"},        /* 4 x 10/25G, nomem */
        {0x6405, "Chelsio T6225-OCP-SO"},       /* 2 x 10/25G, nomem */
        {0x6406, "Chelsio T62100-OCP-SO"},      /* 2 x 40/50/100G, nomem */
        {0x6407, "Chelsio T62100-LP-CR"},       /* 2 x 40/50/100G */
        {0x6408, "Chelsio T62100-SO-CR"},       /* 2 x 40/50/100G, nomem */
        {0x6409, "Chelsio T6210-BT"},           /* 2 x 10GBASE-T */
        {0x640d, "Chelsio T62100-CR"},          /* 2 x 40/50/100G */
        {0x6410, "Chelsio T6-DBG-100"},         /* 2 x 40/50/100G, debug */
        {0x6411, "Chelsio T6225-LL-CR"},        /* 2 x 10/25G */
        {0x6414, "Chelsio T61100-OCP-SO"},      /* 1 x 40/50/100G, nomem */
        {0x6415, "Chelsio T6201-BT"},           /* 2 x 1000BASE-T */

        /* Custom */
        {0x6480, "Custom T6225-CR"},
        {0x6481, "Custom T62100-CR"},
        {0x6482, "Custom T6225-CR"},
        {0x6483, "Custom T62100-CR"},
        {0x6484, "Custom T64100-CR"},
        {0x6485, "Custom T6240-SO"},
        {0x6486, "Custom T6225-SO-CR"},
        {0x6487, "Custom T6225-CR"},
};

#ifdef TCP_OFFLOAD
/*
 * service_iq_fl() has an iq and needs the fl.  Offset of fl from the iq should
 * be exactly the same for both rxq and ofld_rxq.
 */
CTASSERT(offsetof(struct sge_ofld_rxq, iq) == offsetof(struct sge_rxq, iq));
CTASSERT(offsetof(struct sge_ofld_rxq, fl) == offsetof(struct sge_rxq, fl));
#endif
CTASSERT(sizeof(struct cluster_metadata) <= CL_METADATA_SIZE);

static int
t4_probe(device_t dev)
{
        int i;
        uint16_t v = pci_get_vendor(dev);
        uint16_t d = pci_get_device(dev);
        uint8_t f = pci_get_function(dev);

        if (v != PCI_VENDOR_ID_CHELSIO)
                return (ENXIO);

        /* Attach only to PF0 of the FPGA */
        if (d == 0xa000 && f != 0)
                return (ENXIO);

        for (i = 0; i < nitems(t4_pciids); i++) {
                if (d == t4_pciids[i].device) {
                        device_set_desc(dev, t4_pciids[i].desc);
                        return (BUS_PROBE_DEFAULT);
                }
        }

        return (ENXIO);
}

static int
t5_probe(device_t dev)
{
        int i;
        uint16_t v = pci_get_vendor(dev);
        uint16_t d = pci_get_device(dev);
        uint8_t f = pci_get_function(dev);

        if (v != PCI_VENDOR_ID_CHELSIO)
                return (ENXIO);

        /* Attach only to PF0 of the FPGA */
        if (d == 0xb000 && f != 0)
                return (ENXIO);

        for (i = 0; i < nitems(t5_pciids); i++) {
                if (d == t5_pciids[i].device) {
                        device_set_desc(dev, t5_pciids[i].desc);
                        return (BUS_PROBE_DEFAULT);
                }
        }

        return (ENXIO);
}

static int
t6_probe(device_t dev)
{
        int i;
        uint16_t v = pci_get_vendor(dev);
        uint16_t d = pci_get_device(dev);

        if (v != PCI_VENDOR_ID_CHELSIO)
                return (ENXIO);

        for (i = 0; i < nitems(t6_pciids); i++) {
                if (d == t6_pciids[i].device) {
                        device_set_desc(dev, t6_pciids[i].desc);
                        return (BUS_PROBE_DEFAULT);
                }
        }

        return (ENXIO);
}

static void
t5_attribute_workaround(device_t dev)
{
        device_t root_port;
        uint32_t v;

        /*
         * The T5 chips do not properly echo the No Snoop and Relaxed
         * Ordering attributes when replying to a TLP from a Root
         * Port.  As a workaround, find the parent Root Port and
         * disable No Snoop and Relaxed Ordering.  Note that this
         * affects all devices under this root port.
         */
        root_port = pci_find_pcie_root_port(dev);
        if (root_port == NULL) {
                device_printf(dev, "Unable to find parent root port\n");
                return;
        }

        v = pcie_adjust_config(root_port, PCIER_DEVICE_CTL,
            PCIEM_CTL_RELAXED_ORD_ENABLE | PCIEM_CTL_NOSNOOP_ENABLE, 0, 2);
        if ((v & (PCIEM_CTL_RELAXED_ORD_ENABLE | PCIEM_CTL_NOSNOOP_ENABLE)) !=
            0)
                device_printf(dev, "Disabled No Snoop/Relaxed Ordering on %s\n",
                    device_get_nameunit(root_port));
}

static const struct devnames devnames[] = {
        {
                .nexus_name = "t4nex",
                .ifnet_name = "cxgbe",
                .vi_ifnet_name = "vcxgbe",
                .pf03_drv_name = "t4iov",
                .vf_nexus_name = "t4vf",
                .vf_ifnet_name = "cxgbev"
        }, {
                .nexus_name = "t5nex",
                .ifnet_name = "cxl",
                .vi_ifnet_name = "vcxl",
                .pf03_drv_name = "t5iov",
                .vf_nexus_name = "t5vf",
                .vf_ifnet_name = "cxlv"
        }, {
                .nexus_name = "t6nex",
                .ifnet_name = "cc",
                .vi_ifnet_name = "vcc",
                .pf03_drv_name = "t6iov",
                .vf_nexus_name = "t6vf",
                .vf_ifnet_name = "ccv"
        }
};

void
t4_init_devnames(struct adapter *sc)
{
        int id;

        id = chip_id(sc);
        if (id >= CHELSIO_T4 && id - CHELSIO_T4 < nitems(devnames))
                sc->names = &devnames[id - CHELSIO_T4];
        else {
                device_printf(sc->dev, "chip id %d is not supported.\n", id);
                sc->names = NULL;
        }
}

static int
t4_ifnet_unit(struct adapter *sc, struct port_info *pi)
{
        const char *parent, *name;
        long value;
        int line, unit;

        line = 0;
        parent = device_get_nameunit(sc->dev);
        name = sc->names->ifnet_name;
        while (resource_find_dev(&line, name, &unit, "at", parent) == 0) {
                if (resource_long_value(name, unit, "port", &value) == 0 &&
                    value == pi->port_id)
                        return (unit);
        }
        return (-1);
}

static int
t4_attach(device_t dev)
{
        struct adapter *sc;
        int rc = 0, i, j, rqidx, tqidx, nports;
        struct make_dev_args mda;
        struct intrs_and_queues iaq;
        struct sge *s;
        uint32_t *buf;
#if defined(TCP_OFFLOAD) || defined(RATELIMIT)
        int ofld_tqidx;
#endif
#ifdef TCP_OFFLOAD
        int ofld_rqidx;
#endif
#ifdef DEV_NETMAP
        int nm_rqidx, nm_tqidx;
#endif
        int num_vis;

        sc = device_get_softc(dev);
        sc->dev = dev;
        TUNABLE_INT_FETCH("hw.cxgbe.dflags", &sc->debug_flags);

        if ((pci_get_device(dev) & 0xff00) == 0x5400)
                t5_attribute_workaround(dev);
        pci_enable_busmaster(dev);
        if (pci_find_cap(dev, PCIY_EXPRESS, &i) == 0) {
                uint32_t v;

                pci_set_max_read_req(dev, 4096);
                v = pci_read_config(dev, i + PCIER_DEVICE_CTL, 2);
                sc->params.pci.mps = 128 << ((v & PCIEM_CTL_MAX_PAYLOAD) >> 5);
                if (pcie_relaxed_ordering == 0 &&
                    (v & PCIEM_CTL_RELAXED_ORD_ENABLE) != 0) {
                        v &= ~PCIEM_CTL_RELAXED_ORD_ENABLE;
                        pci_write_config(dev, i + PCIER_DEVICE_CTL, v, 2);
                } else if (pcie_relaxed_ordering == 1 &&
                    (v & PCIEM_CTL_RELAXED_ORD_ENABLE) == 0) {
                        v |= PCIEM_CTL_RELAXED_ORD_ENABLE;
                        pci_write_config(dev, i + PCIER_DEVICE_CTL, v, 2);
                }
        }

        sc->sge_gts_reg = MYPF_REG(A_SGE_PF_GTS);
        sc->sge_kdoorbell_reg = MYPF_REG(A_SGE_PF_KDOORBELL);
        sc->traceq = -1;
        mtx_init(&sc->ifp_lock, sc->ifp_lockname, 0, MTX_DEF);
        snprintf(sc->ifp_lockname, sizeof(sc->ifp_lockname), "%s tracer",
            device_get_nameunit(dev));

        snprintf(sc->lockname, sizeof(sc->lockname), "%s",
            device_get_nameunit(dev));
        mtx_init(&sc->sc_lock, sc->lockname, 0, MTX_DEF);
        t4_add_adapter(sc);

        mtx_init(&sc->sfl_lock, "starving freelists", 0, MTX_DEF);
        TAILQ_INIT(&sc->sfl);
        callout_init_mtx(&sc->sfl_callout, &sc->sfl_lock, 0);

        mtx_init(&sc->reg_lock, "indirect register access", 0, MTX_DEF);

        sc->policy = NULL;
        rw_init(&sc->policy_lock, "connection offload policy");

        callout_init(&sc->ktls_tick, 1);

#ifdef TCP_OFFLOAD
        TASK_INIT(&sc->async_event_task, 0, t4_async_event, sc);
#endif

        refcount_init(&sc->vxlan_refcount, 0);

        TASK_INIT(&sc->reset_task, 0, reset_adapter, sc);

        sc->ctrlq_oid = SYSCTL_ADD_NODE(device_get_sysctl_ctx(sc->dev),
            SYSCTL_CHILDREN(device_get_sysctl_tree(sc->dev)), OID_AUTO, "ctrlq",
            CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, "control queues");
        sc->fwq_oid = SYSCTL_ADD_NODE(device_get_sysctl_ctx(sc->dev),
            SYSCTL_CHILDREN(device_get_sysctl_tree(sc->dev)), OID_AUTO, "fwq",
            CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, "firmware event queue");

        rc = t4_map_bars_0_and_4(sc);
        if (rc != 0)
                goto done; /* error message displayed already */

        memset(sc->chan_map, 0xff, sizeof(sc->chan_map));

        /* Prepare the adapter for operation. */
        buf = malloc(PAGE_SIZE, M_CXGBE, M_ZERO | M_WAITOK);
        rc = -t4_prep_adapter(sc, buf);
        free(buf, M_CXGBE);
        if (rc != 0) {
                device_printf(dev, "failed to prepare adapter: %d.\n", rc);
                goto done;
        }

        /*
         * This is the real PF# to which we're attaching.  Works from within PCI
         * passthrough environments too, where pci_get_function() could return a
         * different PF# depending on the passthrough configuration.  We need to
         * use the real PF# in all our communication with the firmware.
         */
        j = t4_read_reg(sc, A_PL_WHOAMI);
        sc->pf = chip_id(sc) <= CHELSIO_T5 ? G_SOURCEPF(j) : G_T6_SOURCEPF(j);
        sc->mbox = sc->pf;

        t4_init_devnames(sc);
        if (sc->names == NULL) {
                rc = ENOTSUP;
                goto done; /* error message displayed already */
        }

        /*
         * Do this really early, with the memory windows set up even before the
         * character device.  The userland tool's register i/o and mem read
         * will work even in "recovery mode".
         */
        setup_memwin(sc);
        if (t4_init_devlog_params(sc, 0) == 0)
                fixup_devlog_params(sc);
        make_dev_args_init(&mda);
        mda.mda_devsw = &t4_cdevsw;
        mda.mda_uid = UID_ROOT;
        mda.mda_gid = GID_WHEEL;
        mda.mda_mode = 0600;
        mda.mda_si_drv1 = sc;
        rc = make_dev_s(&mda, &sc->cdev, "%s", device_get_nameunit(dev));
        if (rc != 0)
                device_printf(dev, "failed to create nexus char device: %d.\n",
                    rc);

        /* Go no further if recovery mode has been requested. */
        if (TUNABLE_INT_FETCH("hw.cxgbe.sos", &i) && i != 0) {
                device_printf(dev, "recovery mode.\n");
                goto done;
        }

#if defined(__i386__)
        if ((cpu_feature & CPUID_CX8) == 0) {
                device_printf(dev, "64 bit atomics not available.\n");
                rc = ENOTSUP;
                goto done;
        }
#endif

        /* Contact the firmware and try to become the master driver. */
        rc = contact_firmware(sc);
        if (rc != 0)
                goto done; /* error message displayed already */
        MPASS(sc->flags & FW_OK);

        rc = get_params__pre_init(sc);
        if (rc != 0)
                goto done; /* error message displayed already */

        if (sc->flags & MASTER_PF) {
                rc = partition_resources(sc);
                if (rc != 0)
                        goto done; /* error message displayed already */
                t4_intr_clear(sc);
        }

        rc = get_params__post_init(sc);
        if (rc != 0)
                goto done; /* error message displayed already */

        rc = set_params__post_init(sc);
        if (rc != 0)
                goto done; /* error message displayed already */

        rc = t4_map_bar_2(sc);
        if (rc != 0)
                goto done; /* error message displayed already */

        rc = t4_create_dma_tag(sc);
        if (rc != 0)
                goto done; /* error message displayed already */

        /*
         * First pass over all the ports - allocate VIs and initialize some
         * basic parameters like mac address, port type, etc.
         */
        for_each_port(sc, i) {
                struct port_info *pi;

                pi = malloc(sizeof(*pi), M_CXGBE, M_ZERO | M_WAITOK);
                sc->port[i] = pi;

                /* These must be set before t4_port_init */
                pi->adapter = sc;
                pi->port_id = i;
                /*
                 * XXX: vi[0] is special so we can't delay this allocation until
                 * pi->nvi's final value is known.
                 */
                pi->vi = malloc(sizeof(struct vi_info) * t4_num_vis, M_CXGBE,
                    M_ZERO | M_WAITOK);

                /*
                 * Allocate the "main" VI and initialize parameters
                 * like mac addr.
                 */
                rc = -t4_port_init(sc, sc->mbox, sc->pf, 0, i);
                if (rc != 0) {
                        device_printf(dev, "unable to initialize port %d: %d\n",
                            i, rc);
                        free(pi->vi, M_CXGBE);
                        free(pi, M_CXGBE);
                        sc->port[i] = NULL;
                        goto done;
                }

                if (is_bt(pi->port_type))
                        setbit(&sc->bt_map, pi->tx_chan);
                else
                        MPASS(!isset(&sc->bt_map, pi->tx_chan));

                snprintf(pi->lockname, sizeof(pi->lockname), "%sp%d",
                    device_get_nameunit(dev), i);
                mtx_init(&pi->pi_lock, pi->lockname, 0, MTX_DEF);
                sc->chan_map[pi->tx_chan] = i;

                /*
                 * The MPS counter for FCS errors doesn't work correctly on the
                 * T6 so we use the MAC counter here.  Which MAC is in use
                 * depends on the link settings which will be known when the
                 * link comes up.
                 */
                if (is_t6(sc)) {
                        pi->fcs_reg = -1;
                } else if (is_t4(sc)) {
                        pi->fcs_reg = PORT_REG(pi->tx_chan,
                            A_MPS_PORT_STAT_RX_PORT_CRC_ERROR_L);
                } else {
                        pi->fcs_reg = T5_PORT_REG(pi->tx_chan,
                            A_MPS_PORT_STAT_RX_PORT_CRC_ERROR_L);
                }
                pi->fcs_base = 0;

                /* All VIs on this port share this media. */
                ifmedia_init(&pi->media, IFM_IMASK, cxgbe_media_change,
                    cxgbe_media_status);

                PORT_LOCK(pi);
                init_link_config(pi);
                fixup_link_config(pi);
                build_medialist(pi);
                if (fixed_ifmedia(pi))
                        pi->flags |= FIXED_IFMEDIA;
                PORT_UNLOCK(pi);

                pi->dev = device_add_child(dev, sc->names->ifnet_name,
                    t4_ifnet_unit(sc, pi));
                if (pi->dev == NULL) {
                        device_printf(dev,
                            "failed to add device for port %d.\n", i);
                        rc = ENXIO;
                        goto done;
                }
                pi->vi[0].dev = pi->dev;
                device_set_softc(pi->dev, pi);
        }

        /*
         * Interrupt type, # of interrupts, # of rx/tx queues, etc.
         */
        nports = sc->params.nports;
        rc = cfg_itype_and_nqueues(sc, &iaq);
        if (rc != 0)
                goto done; /* error message displayed already */

        num_vis = iaq.num_vis;
        sc->intr_type = iaq.intr_type;
        sc->intr_count = iaq.nirq;

        s = &sc->sge;
        s->nrxq = nports * iaq.nrxq;
        s->ntxq = nports * iaq.ntxq;
        if (num_vis > 1) {
                s->nrxq += nports * (num_vis - 1) * iaq.nrxq_vi;
                s->ntxq += nports * (num_vis - 1) * iaq.ntxq_vi;
        }
        s->neq = s->ntxq + s->nrxq;     /* the free list in an rxq is an eq */
        s->neq += nports;               /* ctrl queues: 1 per port */
        s->niq = s->nrxq + 1;           /* 1 extra for firmware event queue */
#if defined(TCP_OFFLOAD) || defined(RATELIMIT)
        if (is_offload(sc) || is_ethoffload(sc)) {
                s->nofldtxq = nports * iaq.nofldtxq;
                if (num_vis > 1)
                        s->nofldtxq += nports * (num_vis - 1) * iaq.nofldtxq_vi;
                s->neq += s->nofldtxq;

                s->ofld_txq = malloc(s->nofldtxq * sizeof(struct sge_ofld_txq),
                    M_CXGBE, M_ZERO | M_WAITOK);
        }
#endif
#ifdef TCP_OFFLOAD
        if (is_offload(sc)) {
                s->nofldrxq = nports * iaq.nofldrxq;
                if (num_vis > 1)
                        s->nofldrxq += nports * (num_vis - 1) * iaq.nofldrxq_vi;
                s->neq += s->nofldrxq;  /* free list */
                s->niq += s->nofldrxq;

                s->ofld_rxq = malloc(s->nofldrxq * sizeof(struct sge_ofld_rxq),
                    M_CXGBE, M_ZERO | M_WAITOK);
        }
#endif
#ifdef DEV_NETMAP
        s->nnmrxq = 0;
        s->nnmtxq = 0;
        if (t4_native_netmap & NN_MAIN_VI) {
                s->nnmrxq += nports * iaq.nnmrxq;
                s->nnmtxq += nports * iaq.nnmtxq;
        }
        if (num_vis > 1 && t4_native_netmap & NN_EXTRA_VI) {
                s->nnmrxq += nports * (num_vis - 1) * iaq.nnmrxq_vi;
                s->nnmtxq += nports * (num_vis - 1) * iaq.nnmtxq_vi;
        }
        s->neq += s->nnmtxq + s->nnmrxq;
        s->niq += s->nnmrxq;

        s->nm_rxq = malloc(s->nnmrxq * sizeof(struct sge_nm_rxq),
            M_CXGBE, M_ZERO | M_WAITOK);
        s->nm_txq = malloc(s->nnmtxq * sizeof(struct sge_nm_txq),
            M_CXGBE, M_ZERO | M_WAITOK);
#endif
        MPASS(s->niq <= s->iqmap_sz);
        MPASS(s->neq <= s->eqmap_sz);

        s->ctrlq = malloc(nports * sizeof(struct sge_wrq), M_CXGBE,
            M_ZERO | M_WAITOK);
        s->rxq = malloc(s->nrxq * sizeof(struct sge_rxq), M_CXGBE,
            M_ZERO | M_WAITOK);
        s->txq = malloc(s->ntxq * sizeof(struct sge_txq), M_CXGBE,
            M_ZERO | M_WAITOK);
        s->iqmap = malloc(s->iqmap_sz * sizeof(struct sge_iq *), M_CXGBE,
            M_ZERO | M_WAITOK);
        s->eqmap = malloc(s->eqmap_sz * sizeof(struct sge_eq *), M_CXGBE,
            M_ZERO | M_WAITOK);

        sc->irq = malloc(sc->intr_count * sizeof(struct irq), M_CXGBE,
            M_ZERO | M_WAITOK);

        t4_init_l2t(sc, M_WAITOK);
        t4_init_smt(sc, M_WAITOK);
        t4_init_tx_sched(sc);
        t4_init_atid_table(sc);
#ifdef RATELIMIT
        t4_init_etid_table(sc);
#endif
#ifdef INET6
        t4_init_clip_table(sc);
#endif
        if (sc->vres.key.size != 0)
                sc->key_map = vmem_create("T4TLS key map", sc->vres.key.start,
                    sc->vres.key.size, 32, 0, M_FIRSTFIT | M_WAITOK);

        /*
         * Second pass over the ports.  This time we know the number of rx and
         * tx queues that each port should get.
         */
        rqidx = tqidx = 0;
#if defined(TCP_OFFLOAD) || defined(RATELIMIT)
        ofld_tqidx = 0;
#endif
#ifdef TCP_OFFLOAD
        ofld_rqidx = 0;
#endif
#ifdef DEV_NETMAP
        nm_rqidx = nm_tqidx = 0;
#endif
        for_each_port(sc, i) {
                struct port_info *pi = sc->port[i];
                struct vi_info *vi;

                if (pi == NULL)
                        continue;

                pi->nvi = num_vis;
                for_each_vi(pi, j, vi) {
                        vi->pi = pi;
                        vi->adapter = sc;
                        vi->first_intr = -1;
                        vi->qsize_rxq = t4_qsize_rxq;
                        vi->qsize_txq = t4_qsize_txq;

                        vi->first_rxq = rqidx;
                        vi->first_txq = tqidx;
                        vi->tmr_idx = t4_tmr_idx;
                        vi->pktc_idx = t4_pktc_idx;
                        vi->nrxq = j == 0 ? iaq.nrxq : iaq.nrxq_vi;
                        vi->ntxq = j == 0 ? iaq.ntxq : iaq.ntxq_vi;

                        rqidx += vi->nrxq;
                        tqidx += vi->ntxq;

                        if (j == 0 && vi->ntxq > 1)
                                vi->rsrv_noflowq = t4_rsrv_noflowq ? 1 : 0;
                        else
                                vi->rsrv_noflowq = 0;

#if defined(TCP_OFFLOAD) || defined(RATELIMIT)
                        vi->first_ofld_txq = ofld_tqidx;
                        vi->nofldtxq = j == 0 ? iaq.nofldtxq : iaq.nofldtxq_vi;
                        ofld_tqidx += vi->nofldtxq;
#endif
#ifdef TCP_OFFLOAD
                        vi->ofld_tmr_idx = t4_tmr_idx_ofld;
                        vi->ofld_pktc_idx = t4_pktc_idx_ofld;
                        vi->first_ofld_rxq = ofld_rqidx;
                        vi->nofldrxq = j == 0 ? iaq.nofldrxq : iaq.nofldrxq_vi;

                        ofld_rqidx += vi->nofldrxq;
#endif
#ifdef DEV_NETMAP
                        vi->first_nm_rxq = nm_rqidx;
                        vi->first_nm_txq = nm_tqidx;
                        if (j == 0) {
                                vi->nnmrxq = iaq.nnmrxq;
                                vi->nnmtxq = iaq.nnmtxq;
                        } else {
                                vi->nnmrxq = iaq.nnmrxq_vi;
                                vi->nnmtxq = iaq.nnmtxq_vi;
                        }
                        nm_rqidx += vi->nnmrxq;
                        nm_tqidx += vi->nnmtxq;
#endif
                }
        }

        rc = t4_setup_intr_handlers(sc);
        if (rc != 0) {
                device_printf(dev,
                    "failed to setup interrupt handlers: %d\n", rc);
                goto done;
        }

        rc = bus_generic_probe(dev);
        if (rc != 0) {
                device_printf(dev, "failed to probe child drivers: %d\n", rc);
                goto done;
        }

        /*
         * Ensure thread-safe mailbox access (in debug builds).
         *
         * So far this was the only thread accessing the mailbox but various
         * ifnets and sysctls are about to be created and their handlers/ioctls
         * will access the mailbox from different threads.
         */
        sc->flags |= CHK_MBOX_ACCESS;

        rc = bus_generic_attach(dev);
        if (rc != 0) {
                device_printf(dev,
                    "failed to attach all child ports: %d\n", rc);
                goto done;
        }

        device_printf(dev,
            "PCIe gen%d x%d, %d ports, %d %s interrupt%s, %d eq, %d iq\n",
            sc->params.pci.speed, sc->params.pci.width, sc->params.nports,
            sc->intr_count, sc->intr_type == INTR_MSIX ? "MSI-X" :
            (sc->intr_type == INTR_MSI ? "MSI" : "INTx"),
            sc->intr_count > 1 ? "s" : "", sc->sge.neq, sc->sge.niq);

        t4_set_desc(sc);

        notify_siblings(dev, 0);

done:
        if (rc != 0 && sc->cdev) {
                /* cdev was created and so cxgbetool works; recover that way. */
                device_printf(dev,
                    "error during attach, adapter is now in recovery mode.\n");
                rc = 0;
        }

        if (rc != 0)
                t4_detach_common(dev);
        else
                t4_sysctls(sc);

        return (rc);
}

static int
t4_child_location(device_t bus, device_t dev, struct sbuf *sb)
{
        struct adapter *sc;
        struct port_info *pi;
        int i;

        sc = device_get_softc(bus);
        for_each_port(sc, i) {
                pi = sc->port[i];
                if (pi != NULL && pi->dev == dev) {
                        sbuf_printf(sb, "port=%d", pi->port_id);
                        break;
                }
        }
        return (0);
}

static int
t4_ready(device_t dev)
{
        struct adapter *sc;

        sc = device_get_softc(dev);
        if (sc->flags & FW_OK)
                return (0);
        return (ENXIO);
}

static int
t4_read_port_device(device_t dev, int port, device_t *child)
{
        struct adapter *sc;
        struct port_info *pi;

        sc = device_get_softc(dev);
        if (port < 0 || port >= MAX_NPORTS)
                return (EINVAL);
        pi = sc->port[port];
        if (pi == NULL || pi->dev == NULL)
                return (ENXIO);
        *child = pi->dev;
        return (0);
}

static int
notify_siblings(device_t dev, int detaching)
{
        device_t sibling;
        int error, i;

        error = 0;
        for (i = 0; i < PCI_FUNCMAX; i++) {
                if (i == pci_get_function(dev))
                        continue;
                sibling = pci_find_dbsf(pci_get_domain(dev), pci_get_bus(dev),
                    pci_get_slot(dev), i);
                if (sibling == NULL || !device_is_attached(sibling))
                        continue;
                if (detaching)
                        error = T4_DETACH_CHILD(sibling);
                else
                        (void)T4_ATTACH_CHILD(sibling);
                if (error)
                        break;
        }
        return (error);
}

/*
 * Idempotent
 */
static int
t4_detach(device_t dev)
{
        int rc;

        rc = notify_siblings(dev, 1);
        if (rc) {
                device_printf(dev,
                    "failed to detach sibling devices: %d\n", rc);
                return (rc);
        }

        return (t4_detach_common(dev));
}

int
t4_detach_common(device_t dev)
{
        struct adapter *sc;
        struct port_info *pi;
        int i, rc;

        sc = device_get_softc(dev);

        if (sc->cdev) {
                destroy_dev(sc->cdev);
                sc->cdev = NULL;
        }

        sx_xlock(&t4_list_lock);
        SLIST_REMOVE(&t4_list, sc, adapter, link);
        sx_xunlock(&t4_list_lock);

        sc->flags &= ~CHK_MBOX_ACCESS;
        if (sc->flags & FULL_INIT_DONE) {
                if (!(sc->flags & IS_VF))
                        t4_intr_disable(sc);
        }

        if (device_is_attached(dev)) {
                rc = bus_generic_detach(dev);
                if (rc) {
                        device_printf(dev,
                            "failed to detach child devices: %d\n", rc);
                        return (rc);
                }
        }

#ifdef TCP_OFFLOAD
        taskqueue_drain(taskqueue_thread, &sc->async_event_task);
#endif

        for (i = 0; i < sc->intr_count; i++)
                t4_free_irq(sc, &sc->irq[i]);

        if ((sc->flags & (IS_VF | FW_OK)) == FW_OK)
                t4_free_tx_sched(sc);

        for (i = 0; i < MAX_NPORTS; i++) {
                pi = sc->port[i];
                if (pi) {
                        t4_free_vi(sc, sc->mbox, sc->pf, 0, pi->vi[0].viid);
                        if (pi->dev)
                                device_delete_child(dev, pi->dev);

                        mtx_destroy(&pi->pi_lock);
                        free(pi->vi, M_CXGBE);
                        free(pi, M_CXGBE);
                }
        }

        device_delete_children(dev);
        adapter_full_uninit(sc);

        if ((sc->flags & (IS_VF | FW_OK)) == FW_OK)
                t4_fw_bye(sc, sc->mbox);

        if (sc->intr_type == INTR_MSI || sc->intr_type == INTR_MSIX)
                pci_release_msi(dev);

        if (sc->regs_res)
                bus_release_resource(dev, SYS_RES_MEMORY, sc->regs_rid,
                    sc->regs_res);

        if (sc->udbs_res)
                bus_release_resource(dev, SYS_RES_MEMORY, sc->udbs_rid,
                    sc->udbs_res);

        if (sc->msix_res)
                bus_release_resource(dev, SYS_RES_MEMORY, sc->msix_rid,
                    sc->msix_res);

        if (sc->l2t)
                t4_free_l2t(sc->l2t);
        if (sc->smt)
                t4_free_smt(sc->smt);
        t4_free_atid_table(sc);
#ifdef RATELIMIT
        t4_free_etid_table(sc);
#endif
        if (sc->key_map)
                vmem_destroy(sc->key_map);
#ifdef INET6
        t4_destroy_clip_table(sc);
#endif

#if defined(TCP_OFFLOAD) || defined(RATELIMIT)
        free(sc->sge.ofld_txq, M_CXGBE);
#endif
#ifdef TCP_OFFLOAD
        free(sc->sge.ofld_rxq, M_CXGBE);
#endif
#ifdef DEV_NETMAP
        free(sc->sge.nm_rxq, M_CXGBE);
        free(sc->sge.nm_txq, M_CXGBE);
#endif
        free(sc->irq, M_CXGBE);
        free(sc->sge.rxq, M_CXGBE);
        free(sc->sge.txq, M_CXGBE);
        free(sc->sge.ctrlq, M_CXGBE);
        free(sc->sge.iqmap, M_CXGBE);
        free(sc->sge.eqmap, M_CXGBE);
        free(sc->tids.ftid_tab, M_CXGBE);
        free(sc->tids.hpftid_tab, M_CXGBE);
        free_hftid_hash(&sc->tids);
        free(sc->tids.tid_tab, M_CXGBE);
        free(sc->tt.tls_rx_ports, M_CXGBE);
        t4_destroy_dma_tag(sc);

        callout_drain(&sc->ktls_tick);
        callout_drain(&sc->sfl_callout);
        if (mtx_initialized(&sc->tids.ftid_lock)) {
                mtx_destroy(&sc->tids.ftid_lock);
                cv_destroy(&sc->tids.ftid_cv);
        }
        if (mtx_initialized(&sc->tids.atid_lock))
                mtx_destroy(&sc->tids.atid_lock);
        if (mtx_initialized(&sc->ifp_lock))
                mtx_destroy(&sc->ifp_lock);

        if (rw_initialized(&sc->policy_lock)) {
                rw_destroy(&sc->policy_lock);
#ifdef TCP_OFFLOAD
                if (sc->policy != NULL)
                        free_offload_policy(sc->policy);
#endif
        }

        for (i = 0; i < NUM_MEMWIN; i++) {
                struct memwin *mw = &sc->memwin[i];

                if (rw_initialized(&mw->mw_lock))
                        rw_destroy(&mw->mw_lock);
        }

        mtx_destroy(&sc->sfl_lock);
        mtx_destroy(&sc->reg_lock);
        mtx_destroy(&sc->sc_lock);

        bzero(sc, sizeof(*sc));

        return (0);
}

static inline bool
ok_to_reset(struct adapter *sc)
{
        struct tid_info *t = &sc->tids;
        struct port_info *pi;
        struct vi_info *vi;
        int i, j;
        const int caps = IFCAP_TOE | IFCAP_TXTLS | IFCAP_NETMAP | IFCAP_TXRTLMT;

        ASSERT_SYNCHRONIZED_OP(sc);
        MPASS(!(sc->flags & IS_VF));

        for_each_port(sc, i) {
                pi = sc->port[i];
                for_each_vi(pi, j, vi) {
                        if (vi->ifp->if_capenable & caps)
                                return (false);
                }
        }

        if (atomic_load_int(&t->tids_in_use) > 0)
                return (false);
        if (atomic_load_int(&t->stids_in_use) > 0)
                return (false);
        if (atomic_load_int(&t->atids_in_use) > 0)
                return (false);
        if (atomic_load_int(&t->ftids_in_use) > 0)
                return (false);
        if (atomic_load_int(&t->hpftids_in_use) > 0)
                return (false);
        if (atomic_load_int(&t->etids_in_use) > 0)
                return (false);

        return (true);
}

static int
t4_suspend(device_t dev)
{
        struct adapter *sc = device_get_softc(dev);
        struct port_info *pi;
        struct vi_info *vi;
        struct ifnet *ifp;
        struct sge_rxq *rxq;
        struct sge_txq *txq;
        struct sge_wrq *wrq;
#ifdef TCP_OFFLOAD
        struct sge_ofld_rxq *ofld_rxq;
#endif
#if defined(TCP_OFFLOAD) || defined(RATELIMIT)
        struct sge_ofld_txq *ofld_txq;
#endif
        int rc, i, j, k;

        CH_ALERT(sc, "suspend requested\n");

        rc = begin_synchronized_op(sc, NULL, SLEEP_OK, "t4sus");
        if (rc != 0)
                return (ENXIO);

        /* XXX: Can the kernel call suspend repeatedly without resume? */
        MPASS(!hw_off_limits(sc));

        if (!ok_to_reset(sc)) {
                /* XXX: should list what resource is preventing suspend. */
                CH_ERR(sc, "not safe to suspend.\n");
                rc = EBUSY;
                goto done;
        }

        /* No more DMA or interrupts. */
        t4_shutdown_adapter(sc);

        /* Quiesce all activity. */
        for_each_port(sc, i) {
                pi = sc->port[i];
                pi->vxlan_tcam_entry = false;

                PORT_LOCK(pi);
                if (pi->up_vis > 0) {
                        /*
                         * t4_shutdown_adapter has already shut down all the
                         * PHYs but it also disables interrupts and DMA so there
                         * won't be a link interrupt.  So we update the state
                         * manually and inform the kernel.
                         */
                        pi->link_cfg.link_ok = false;
                        t4_os_link_changed(pi);
                }
                PORT_UNLOCK(pi);

                for_each_vi(pi, j, vi) {
                        vi->xact_addr_filt = -1;
                        if (!(vi->flags & VI_INIT_DONE))
                                continue;

                        ifp = vi->ifp;
                        if (ifp->if_drv_flags & IFF_DRV_RUNNING) {
                                mtx_lock(&vi->tick_mtx);
                                vi->flags |= VI_SKIP_STATS;
                                callout_stop(&vi->tick);
                                mtx_unlock(&vi->tick_mtx);
                                callout_drain(&vi->tick);
                        }

                        /*
                         * Note that the HW is not available.
                         */
                        for_each_txq(vi, k, txq) {
                                TXQ_LOCK(txq);
                                txq->eq.flags &= ~(EQ_ENABLED | EQ_HW_ALLOCATED);
                                TXQ_UNLOCK(txq);
                        }
#if defined(TCP_OFFLOAD) || defined(RATELIMIT)
                        for_each_ofld_txq(vi, k, ofld_txq) {
                                ofld_txq->wrq.eq.flags &= ~EQ_HW_ALLOCATED;
                        }
#endif
                        for_each_rxq(vi, k, rxq) {
                                rxq->iq.flags &= ~IQ_HW_ALLOCATED;
                        }
#if defined(TCP_OFFLOAD)
                        for_each_ofld_rxq(vi, k, ofld_rxq) {
                                ofld_rxq->iq.flags &= ~IQ_HW_ALLOCATED;
                        }
#endif

                        quiesce_vi(vi);
                }

                if (sc->flags & FULL_INIT_DONE) {
                        /* Control queue */
                        wrq = &sc->sge.ctrlq[i];
                        wrq->eq.flags &= ~EQ_HW_ALLOCATED;
                        quiesce_wrq(wrq);
                }
        }
        if (sc->flags & FULL_INIT_DONE) {
                /* Firmware event queue */
                sc->sge.fwq.flags &= ~IQ_HW_ALLOCATED;
                quiesce_iq_fl(sc, &sc->sge.fwq, NULL);
        }

        /* Mark the adapter totally off limits. */
        mtx_lock(&sc->reg_lock);
        sc->flags |= HW_OFF_LIMITS;
        sc->flags &= ~(FW_OK | MASTER_PF);
        sc->reset_thread = NULL;
        mtx_unlock(&sc->reg_lock);

        sc->num_resets++;
        CH_ALERT(sc, "suspend completed.\n");
done:
        end_synchronized_op(sc, 0);
        return (rc);
}

struct adapter_pre_reset_state {
        u_int flags;
        uint16_t nbmcaps;
        uint16_t linkcaps;
        uint16_t switchcaps;
        uint16_t niccaps;
        uint16_t toecaps;
        uint16_t rdmacaps;
        uint16_t cryptocaps;
        uint16_t iscsicaps;
        uint16_t fcoecaps;

        u_int cfcsum;
        char cfg_file[32];

        struct adapter_params params;
        struct t4_virt_res vres;
        struct tid_info tids;
        struct sge sge;

        int rawf_base;
        int nrawf;

};

static void
save_caps_and_params(struct adapter *sc, struct adapter_pre_reset_state *o)
{

        ASSERT_SYNCHRONIZED_OP(sc);

        o->flags = sc->flags;

        o->nbmcaps =  sc->nbmcaps;
        o->linkcaps = sc->linkcaps;
        o->switchcaps = sc->switchcaps;
        o->niccaps = sc->niccaps;
        o->toecaps = sc->toecaps;
        o->rdmacaps = sc->rdmacaps;
        o->cryptocaps = sc->cryptocaps;
        o->iscsicaps = sc->iscsicaps;
        o->fcoecaps = sc->fcoecaps;

        o->cfcsum = sc->cfcsum;
        MPASS(sizeof(o->cfg_file) == sizeof(sc->cfg_file));
        memcpy(o->cfg_file, sc->cfg_file, sizeof(o->cfg_file));

        o->params = sc->params;
        o->vres = sc->vres;
        o->tids = sc->tids;
        o->sge = sc->sge;

        o->rawf_base = sc->rawf_base;
        o->nrawf = sc->nrawf;
}

static int
compare_caps_and_params(struct adapter *sc, struct adapter_pre_reset_state *o)
{
        int rc = 0;

        ASSERT_SYNCHRONIZED_OP(sc);

        /* Capabilities */
#define COMPARE_CAPS(c) do { \
        if (o->c##caps != sc->c##caps) { \
                CH_ERR(sc, "%scaps 0x%04x -> 0x%04x.\n", #c, o->c##caps, \
                    sc->c##caps); \
                rc = EINVAL; \
        } \
} while (0)
        COMPARE_CAPS(nbm);
        COMPARE_CAPS(link);
        COMPARE_CAPS(switch);
        COMPARE_CAPS(nic);
        COMPARE_CAPS(toe);
        COMPARE_CAPS(rdma);
        COMPARE_CAPS(crypto);
        COMPARE_CAPS(iscsi);
        COMPARE_CAPS(fcoe);
#undef COMPARE_CAPS

        /* Firmware config file */
        if (o->cfcsum != sc->cfcsum) {
                CH_ERR(sc, "config file %s (0x%x) -> %s (0x%x)\n", o->cfg_file,
                    o->cfcsum, sc->cfg_file, sc->cfcsum);
                rc = EINVAL;
        }

#define COMPARE_PARAM(p, name) do { \
        if (o->p != sc->p) { \
                CH_ERR(sc, #name " %d -> %d\n", o->p, sc->p); \
                rc = EINVAL; \
        } \
} while (0)
        COMPARE_PARAM(sge.iq_start, iq_start);
        COMPARE_PARAM(sge.eq_start, eq_start);
        COMPARE_PARAM(tids.ftid_base, ftid_base);
        COMPARE_PARAM(tids.ftid_end, ftid_end);
        COMPARE_PARAM(tids.nftids, nftids);
        COMPARE_PARAM(vres.l2t.start, l2t_start);
        COMPARE_PARAM(vres.l2t.size, l2t_size);
        COMPARE_PARAM(sge.iqmap_sz, iqmap_sz);
        COMPARE_PARAM(sge.eqmap_sz, eqmap_sz);
        COMPARE_PARAM(tids.tid_base, tid_base);
        COMPARE_PARAM(tids.hpftid_base, hpftid_base);
        COMPARE_PARAM(tids.hpftid_end, hpftid_end);
        COMPARE_PARAM(tids.nhpftids, nhpftids);
        COMPARE_PARAM(rawf_base, rawf_base);
        COMPARE_PARAM(nrawf, nrawf);
        COMPARE_PARAM(params.mps_bg_map, mps_bg_map);
        COMPARE_PARAM(params.filter2_wr_support, filter2_wr_support);
        COMPARE_PARAM(params.ulptx_memwrite_dsgl, ulptx_memwrite_dsgl);
        COMPARE_PARAM(params.fr_nsmr_tpte_wr_support, fr_nsmr_tpte_wr_support);
        COMPARE_PARAM(params.max_pkts_per_eth_tx_pkts_wr, max_pkts_per_eth_tx_pkts_wr);
        COMPARE_PARAM(tids.ntids, ntids);
        COMPARE_PARAM(tids.etid_base, etid_base);
        COMPARE_PARAM(tids.etid_end, etid_end);
        COMPARE_PARAM(tids.netids, netids);
        COMPARE_PARAM(params.eo_wr_cred, eo_wr_cred);
        COMPARE_PARAM(params.ethoffload, ethoffload);
        COMPARE_PARAM(tids.natids, natids);
        COMPARE_PARAM(tids.stid_base, stid_base);
        COMPARE_PARAM(vres.ddp.start, ddp_start);
        COMPARE_PARAM(vres.ddp.size, ddp_size);
        COMPARE_PARAM(params.ofldq_wr_cred, ofldq_wr_cred);
        COMPARE_PARAM(vres.stag.start, stag_start);
        COMPARE_PARAM(vres.stag.size, stag_size);
        COMPARE_PARAM(vres.rq.start, rq_start);
        COMPARE_PARAM(vres.rq.size, rq_size);
        COMPARE_PARAM(vres.pbl.start, pbl_start);
        COMPARE_PARAM(vres.pbl.size, pbl_size);
        COMPARE_PARAM(vres.qp.start, qp_start);
        COMPARE_PARAM(vres.qp.size, qp_size);
        COMPARE_PARAM(vres.cq.start, cq_start);
        COMPARE_PARAM(vres.cq.size, cq_size);
        COMPARE_PARAM(vres.ocq.start, ocq_start);
        COMPARE_PARAM(vres.ocq.size, ocq_size);
        COMPARE_PARAM(vres.srq.start, srq_start);
        COMPARE_PARAM(vres.srq.size, srq_size);
        COMPARE_PARAM(params.max_ordird_qp, max_ordird_qp);
        COMPARE_PARAM(params.max_ird_adapter, max_ird_adapter);
        COMPARE_PARAM(vres.iscsi.start, iscsi_start);
        COMPARE_PARAM(vres.iscsi.size, iscsi_size);
        COMPARE_PARAM(vres.key.start, key_start);
        COMPARE_PARAM(vres.key.size, key_size);
#undef COMPARE_PARAM

        return (rc);
}

static int
t4_resume(device_t dev)
{
        struct adapter *sc = device_get_softc(dev);
        struct adapter_pre_reset_state *old_state = NULL;
        struct port_info *pi;
        struct vi_info *vi;
        struct ifnet *ifp;
        struct sge_txq *txq;
        int rc, i, j, k;

        CH_ALERT(sc, "resume requested.\n");

        rc = begin_synchronized_op(sc, NULL, SLEEP_OK, "t4res");
        if (rc != 0)
                return (ENXIO);
        MPASS(hw_off_limits(sc));
        MPASS((sc->flags & FW_OK) == 0);
        MPASS((sc->flags & MASTER_PF) == 0);
        MPASS(sc->reset_thread == NULL);
        sc->reset_thread = curthread;

        /* Register access is expected to work by the time we're here. */
        if (t4_read_reg(sc, A_PL_WHOAMI) == 0xffffffff) {
                CH_ERR(sc, "%s: can't read device registers\n", __func__);
                rc = ENXIO;
                goto done;
        }

        /* Restore memory window. */
        setup_memwin(sc);

        /* Go no further if recovery mode has been requested. */
        if (TUNABLE_INT_FETCH("hw.cxgbe.sos", &i) && i != 0) {
                CH_ALERT(sc, "recovery mode on resume.\n");
                rc = 0;
                mtx_lock(&sc->reg_lock);
                sc->flags &= ~HW_OFF_LIMITS;
                mtx_unlock(&sc->reg_lock);
                goto done;
        }

        old_state = malloc(sizeof(*old_state), M_CXGBE, M_ZERO | M_WAITOK);
        save_caps_and_params(sc, old_state);

        /* Reestablish contact with firmware and become the primary PF. */
        rc = contact_firmware(sc);
        if (rc != 0)
                goto done; /* error message displayed already */
        MPASS(sc->flags & FW_OK);

        if (sc->flags & MASTER_PF) {
                rc = partition_resources(sc);
                if (rc != 0)
                        goto done; /* error message displayed already */
                t4_intr_clear(sc);
        }

        rc = get_params__post_init(sc);
        if (rc != 0)
                goto done; /* error message displayed already */

        rc = set_params__post_init(sc);
        if (rc != 0)
                goto done; /* error message displayed already */

        rc = compare_caps_and_params(sc, old_state);
        if (rc != 0)
                goto done; /* error message displayed already */

        for_each_port(sc, i) {
                pi = sc->port[i];
                MPASS(pi != NULL);
                MPASS(pi->vi != NULL);
                MPASS(pi->vi[0].dev == pi->dev);

                rc = -t4_port_init(sc, sc->mbox, sc->pf, 0, i);
                if (rc != 0) {
                        CH_ERR(sc,
                            "failed to re-initialize port %d: %d\n", i, rc);
                        goto done;
                }
                MPASS(sc->chan_map[pi->tx_chan] == i);

                PORT_LOCK(pi);
                fixup_link_config(pi);
                build_medialist(pi);
                PORT_UNLOCK(pi);
                for_each_vi(pi, j, vi) {
                        if (IS_MAIN_VI(vi))
                                continue;
                        rc = alloc_extra_vi(sc, pi, vi);
                        if (rc != 0) {
                                CH_ERR(vi,
                                    "failed to re-allocate extra VI: %d\n", rc);
                                goto done;
                        }
                }
        }

        /*
         * Interrupts and queues are about to be enabled and other threads will
         * want to access the hardware too.  It is safe to do so.  Note that
         * this thread is still in the middle of a synchronized_op.
         */
        mtx_lock(&sc->reg_lock);
        sc->flags &= ~HW_OFF_LIMITS;
        mtx_unlock(&sc->reg_lock);

        if (sc->flags & FULL_INIT_DONE) {
                rc = adapter_full_init(sc);
                if (rc != 0) {
                        CH_ERR(sc, "failed to re-initialize adapter: %d\n", rc);
                        goto done;
                }

                if (sc->vxlan_refcount > 0)
                        enable_vxlan_rx(sc);

                for_each_port(sc, i) {
                        pi = sc->port[i];
                        for_each_vi(pi, j, vi) {
                                if (!(vi->flags & VI_INIT_DONE))
                                        continue;
                                rc = vi_full_init(vi);
                                if (rc != 0) {
                                        CH_ERR(vi, "failed to re-initialize "
                                            "interface: %d\n", rc);
                                        goto done;
                                }

                                ifp = vi->ifp;
                                if (!(ifp->if_drv_flags & IFF_DRV_RUNNING))
                                        continue;
                                /*
                                 * Note that we do not setup multicast addresses
                                 * in the first pass.  This ensures that the
                                 * unicast DMACs for all VIs on all ports get an
                                 * MPS TCAM entry.
                                 */
                                rc = update_mac_settings(ifp, XGMAC_ALL &
                                    ~XGMAC_MCADDRS);
                                if (rc != 0) {
                                        CH_ERR(vi, "failed to re-configure MAC: %d\n", rc);
                                        goto done;
                                }
                                rc = -t4_enable_vi(sc, sc->mbox, vi->viid, true,
                                    true);
                                if (rc != 0) {
                                        CH_ERR(vi, "failed to re-enable VI: %d\n", rc);
                                        goto done;
                                }
                                for_each_txq(vi, k, txq) {
                                        TXQ_LOCK(txq);
                                        txq->eq.flags |= EQ_ENABLED;
                                        TXQ_UNLOCK(txq);
                                }
                                mtx_lock(&vi->tick_mtx);
                                vi->flags &= ~VI_SKIP_STATS;
                                callout_schedule(&vi->tick, hz);
                                mtx_unlock(&vi->tick_mtx);
                        }
                        PORT_LOCK(pi);
                        if (pi->up_vis > 0) {
                                t4_update_port_info(pi);
                                fixup_link_config(pi);
                                build_medialist(pi);
                                apply_link_config(pi);
                                if (pi->link_cfg.link_ok)
                                        t4_os_link_changed(pi);
                        }
                        PORT_UNLOCK(pi);
                }

                /* Now reprogram the L2 multicast addresses. */
                for_each_port(sc, i) {
                        pi = sc->port[i];
                        for_each_vi(pi, j, vi) {
                                if (!(vi->flags & VI_INIT_DONE))
                                        continue;
                                ifp = vi->ifp;
                                if (!(ifp->if_drv_flags & IFF_DRV_RUNNING))
                                        continue;
                                rc = update_mac_settings(ifp, XGMAC_MCADDRS);
                                if (rc != 0) {
                                        CH_ERR(vi, "failed to re-configure MCAST MACs: %d\n", rc);
                                        rc = 0; /* carry on */
                                }
                        }
                }
        }
done:
        if (rc == 0) {
                sc->incarnation++;
                CH_ALERT(sc, "resume completed.\n");
        }
        end_synchronized_op(sc, 0);
        free(old_state, M_CXGBE);
        return (rc);
}

static int
t4_reset_prepare(device_t dev, device_t child)
{
        struct adapter *sc = device_get_softc(dev);

        CH_ALERT(sc, "reset_prepare.\n");
        return (0);
}

static int
t4_reset_post(device_t dev, device_t child)
{
        struct adapter *sc = device_get_softc(dev);

        CH_ALERT(sc, "reset_post.\n");
        return (0);
}

static void
reset_adapter(void *arg, int pending)
{
        struct adapter *sc = arg;
        int rc;

        CH_ALERT(sc, "reset requested.\n");

        rc = begin_synchronized_op(sc, NULL, SLEEP_OK, "t4rst1");
        if (rc != 0)
                return;

        if (hw_off_limits(sc)) {
                CH_ERR(sc, "adapter is suspended, use resume (not reset).\n");
                rc = ENXIO;
                goto done;
        }

        if (!ok_to_reset(sc)) {
                /* XXX: should list what resource is preventing reset. */
                CH_ERR(sc, "not safe to reset.\n");
                rc = EBUSY;
                goto done;
        }

done:
        end_synchronized_op(sc, 0);
        if (rc != 0)
                return; /* Error logged already. */

        mtx_lock(&Giant);
        rc = BUS_RESET_CHILD(device_get_parent(sc->dev), sc->dev, 0);
        mtx_unlock(&Giant);
        if (rc != 0)
                CH_ERR(sc, "bus_reset_child failed: %d.\n", rc);
        else
                CH_ALERT(sc, "bus_reset_child succeeded.\n");
}

static int
cxgbe_probe(device_t dev)
{
        char buf[128];
        struct port_info *pi = device_get_softc(dev);

        snprintf(buf, sizeof(buf), "port %d", pi->port_id);
        device_set_desc_copy(dev, buf);

        return (BUS_PROBE_DEFAULT);
}

#define T4_CAP (IFCAP_VLAN_HWTAGGING | IFCAP_VLAN_MTU | IFCAP_HWCSUM | \
    IFCAP_VLAN_HWCSUM | IFCAP_TSO | IFCAP_JUMBO_MTU | IFCAP_LRO | \
    IFCAP_VLAN_HWTSO | IFCAP_LINKSTATE | IFCAP_HWCSUM_IPV6 | IFCAP_HWSTATS | \
    IFCAP_HWRXTSTMP | IFCAP_MEXTPG)
#define T4_CAP_ENABLE (T4_CAP)

static int
cxgbe_vi_attach(device_t dev, struct vi_info *vi)
{
        struct ifnet *ifp;
        struct sbuf *sb;
        struct sysctl_ctx_list *ctx;
        struct sysctl_oid_list *children;
        struct pfil_head_args pa;
        struct adapter *sc = vi->adapter;

        ctx = device_get_sysctl_ctx(vi->dev);
        children = SYSCTL_CHILDREN(device_get_sysctl_tree(vi->dev));
        vi->rxq_oid = SYSCTL_ADD_NODE(ctx, children, OID_AUTO, "rxq",
            CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, "NIC rx queues");
        vi->txq_oid = SYSCTL_ADD_NODE(ctx, children, OID_AUTO, "txq",
            CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, "NIC tx queues");
#ifdef DEV_NETMAP
        vi->nm_rxq_oid = SYSCTL_ADD_NODE(ctx, children, OID_AUTO, "nm_rxq",
            CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, "netmap rx queues");
        vi->nm_txq_oid = SYSCTL_ADD_NODE(ctx, children, OID_AUTO, "nm_txq",
            CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, "netmap tx queues");
#endif
#ifdef TCP_OFFLOAD
        vi->ofld_rxq_oid = SYSCTL_ADD_NODE(ctx, children, OID_AUTO, "ofld_rxq",
            CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, "TOE rx queues");
#endif
#if defined(TCP_OFFLOAD) || defined(RATELIMIT)
        vi->ofld_txq_oid = SYSCTL_ADD_NODE(ctx, children, OID_AUTO, "ofld_txq",
            CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, "TOE/ETHOFLD tx queues");
#endif

        vi->xact_addr_filt = -1;
        mtx_init(&vi->tick_mtx, "vi tick", NULL, MTX_DEF);
        callout_init_mtx(&vi->tick, &vi->tick_mtx, 0);
        if (sc->flags & IS_VF || t4_tx_vm_wr != 0)
                vi->flags |= TX_USES_VM_WR;

        /* Allocate an ifnet and set it up */
        ifp = if_alloc_dev(IFT_ETHER, dev);
        if (ifp == NULL) {
                device_printf(dev, "Cannot allocate ifnet\n");
                return (ENOMEM);
        }
        vi->ifp = ifp;
        ifp->if_softc = vi;

        if_initname(ifp, device_get_name(dev), device_get_unit(dev));
        ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;

        ifp->if_init = cxgbe_init;
        ifp->if_ioctl = cxgbe_ioctl;
        ifp->if_transmit = cxgbe_transmit;
        ifp->if_qflush = cxgbe_qflush;
        if (vi->pi->nvi > 1 || sc->flags & IS_VF)
                ifp->if_get_counter = vi_get_counter;
        else
                ifp->if_get_counter = cxgbe_get_counter;
#if defined(KERN_TLS) || defined(RATELIMIT)
        ifp->if_snd_tag_alloc = cxgbe_snd_tag_alloc;
#endif
#ifdef RATELIMIT
        ifp->if_ratelimit_query = cxgbe_ratelimit_query;
#endif

        ifp->if_capabilities = T4_CAP;
        ifp->if_capenable = T4_CAP_ENABLE;
        ifp->if_hwassist = CSUM_TCP | CSUM_UDP | CSUM_IP | CSUM_TSO |
            CSUM_UDP_IPV6 | CSUM_TCP_IPV6;
        if (chip_id(sc) >= CHELSIO_T6) {
                ifp->if_capabilities |= IFCAP_VXLAN_HWCSUM | IFCAP_VXLAN_HWTSO;
                ifp->if_capenable |= IFCAP_VXLAN_HWCSUM | IFCAP_VXLAN_HWTSO;
                ifp->if_hwassist |= CSUM_INNER_IP6_UDP | CSUM_INNER_IP6_TCP |
                    CSUM_INNER_IP6_TSO | CSUM_INNER_IP | CSUM_INNER_IP_UDP |
                    CSUM_INNER_IP_TCP | CSUM_INNER_IP_TSO | CSUM_ENCAP_VXLAN;
        }

#ifdef TCP_OFFLOAD
        if (vi->nofldrxq != 0)
                ifp->if_capabilities |= IFCAP_TOE;
#endif
#ifdef RATELIMIT
        if (is_ethoffload(sc) && vi->nofldtxq != 0) {
                ifp->if_capabilities |= IFCAP_TXRTLMT;
                ifp->if_capenable |= IFCAP_TXRTLMT;
        }
#endif

        ifp->if_hw_tsomax = IP_MAXPACKET;
        if (vi->flags & TX_USES_VM_WR)
                ifp->if_hw_tsomaxsegcount = TX_SGL_SEGS_VM_TSO;
        else
                ifp->if_hw_tsomaxsegcount = TX_SGL_SEGS_TSO;
#ifdef RATELIMIT
        if (is_ethoffload(sc) && vi->nofldtxq != 0)
                ifp->if_hw_tsomaxsegcount = TX_SGL_SEGS_EO_TSO;
#endif
        ifp->if_hw_tsomaxsegsize = 65536;
#ifdef KERN_TLS
        if (is_ktls(sc)) {
                ifp->if_capabilities |= IFCAP_TXTLS;
                if (sc->flags & KERN_TLS_ON)
                        ifp->if_capenable |= IFCAP_TXTLS;
        }
#endif

        ether_ifattach(ifp, vi->hw_addr);
#ifdef DEV_NETMAP
        if (vi->nnmrxq != 0)
                cxgbe_nm_attach(vi);
#endif
        sb = sbuf_new_auto();
        sbuf_printf(sb, "%d txq, %d rxq (NIC)", vi->ntxq, vi->nrxq);
#if defined(TCP_OFFLOAD) || defined(RATELIMIT)
        switch (ifp->if_capabilities & (IFCAP_TOE | IFCAP_TXRTLMT)) {
        case IFCAP_TOE:
                sbuf_printf(sb, "; %d txq (TOE)", vi->nofldtxq);
                break;
        case IFCAP_TOE | IFCAP_TXRTLMT:
                sbuf_printf(sb, "; %d txq (TOE/ETHOFLD)", vi->nofldtxq);
                break;
        case IFCAP_TXRTLMT:
                sbuf_printf(sb, "; %d txq (ETHOFLD)", vi->nofldtxq);
                break;
        }
#endif
#ifdef TCP_OFFLOAD
        if (ifp->if_capabilities & IFCAP_TOE)
                sbuf_printf(sb, ", %d rxq (TOE)", vi->nofldrxq);
#endif
#ifdef DEV_NETMAP
        if (ifp->if_capabilities & IFCAP_NETMAP)
                sbuf_printf(sb, "; %d txq, %d rxq (netmap)",
                    vi->nnmtxq, vi->nnmrxq);
#endif
        sbuf_finish(sb);
        device_printf(dev, "%s\n", sbuf_data(sb));
        sbuf_delete(sb);

        vi_sysctls(vi);

        pa.pa_version = PFIL_VERSION;
        pa.pa_flags = PFIL_IN;
        pa.pa_type = PFIL_TYPE_ETHERNET;
        pa.pa_headname = ifp->if_xname;
        vi->pfil = pfil_head_register(&pa);

        return (0);
}

static int
cxgbe_attach(device_t dev)
{
        struct port_info *pi = device_get_softc(dev);
        struct adapter *sc = pi->adapter;
        struct vi_info *vi;
        int i, rc;

        rc = cxgbe_vi_attach(dev, &pi->vi[0]);
        if (rc)
                return (rc);

        for_each_vi(pi, i, vi) {
                if (i == 0)
                        continue;
                vi->dev = device_add_child(dev, sc->names->vi_ifnet_name, -1);
                if (vi->dev == NULL) {
                        device_printf(dev, "failed to add VI %d\n", i);
                        continue;
                }
                device_set_softc(vi->dev, vi);
        }

        cxgbe_sysctls(pi);

        bus_generic_attach(dev);

        return (0);
}

static void
cxgbe_vi_detach(struct vi_info *vi)
{
        struct ifnet *ifp = vi->ifp;

        if (vi->pfil != NULL) {
                pfil_head_unregister(vi->pfil);
                vi->pfil = NULL;
        }

        ether_ifdetach(ifp);

        /* Let detach proceed even if these fail. */
#ifdef DEV_NETMAP
        if (ifp->if_capabilities & IFCAP_NETMAP)
                cxgbe_nm_detach(vi);
#endif
        cxgbe_uninit_synchronized(vi);
        callout_drain(&vi->tick);
        vi_full_uninit(vi);

        if_free(vi->ifp);
        vi->ifp = NULL;
}

static int
cxgbe_detach(device_t dev)
{
        struct port_info *pi = device_get_softc(dev);
        struct adapter *sc = pi->adapter;
        int rc;

        /* Detach the extra VIs first. */
        rc = bus_generic_detach(dev);
        if (rc)
                return (rc);
        device_delete_children(dev);

        doom_vi(sc, &pi->vi[0]);

        if (pi->flags & HAS_TRACEQ) {
                sc->traceq = -1;        /* cloner should not create ifnet */
                t4_tracer_port_detach(sc);
        }

        cxgbe_vi_detach(&pi->vi[0]);
        ifmedia_removeall(&pi->media);

        end_synchronized_op(sc, 0);

        return (0);
}

static void
cxgbe_init(void *arg)
{
        struct vi_info *vi = arg;
        struct adapter *sc = vi->adapter;

        if (begin_synchronized_op(sc, vi, SLEEP_OK | INTR_OK, "t4init") != 0)
                return;
        cxgbe_init_synchronized(vi);
        end_synchronized_op(sc, 0);
}

static int
cxgbe_ioctl(struct ifnet *ifp, unsigned long cmd, caddr_t data)
{
        int rc = 0, mtu, flags;
        struct vi_info *vi = ifp->if_softc;
        struct port_info *pi = vi->pi;
        struct adapter *sc = pi->adapter;
        struct ifreq *ifr = (struct ifreq *)data;
        uint32_t mask;

        switch (cmd) {
        case SIOCSIFMTU:
                mtu = ifr->ifr_mtu;
                if (mtu < ETHERMIN || mtu > MAX_MTU)
                        return (EINVAL);

                rc = begin_synchronized_op(sc, vi, SLEEP_OK | INTR_OK, "t4mtu");
                if (rc)
                        return (rc);
                ifp->if_mtu = mtu;
                if (vi->flags & VI_INIT_DONE) {
                        t4_update_fl_bufsize(ifp);
                        if (!hw_off_limits(sc) &&
                            ifp->if_drv_flags & IFF_DRV_RUNNING)
                                rc = update_mac_settings(ifp, XGMAC_MTU);
                }
                end_synchronized_op(sc, 0);
                break;

        case SIOCSIFFLAGS:
                rc = begin_synchronized_op(sc, vi, SLEEP_OK | INTR_OK, "t4flg");
                if (rc)
                        return (rc);

                if (hw_off_limits(sc)) {
                        rc = ENXIO;
                        goto fail;
                }

                if (ifp->if_flags & IFF_UP) {
                        if (ifp->if_drv_flags & IFF_DRV_RUNNING) {
                                flags = vi->if_flags;
                                if ((ifp->if_flags ^ flags) &
                                    (IFF_PROMISC | IFF_ALLMULTI)) {
                                        rc = update_mac_settings(ifp,
                                            XGMAC_PROMISC | XGMAC_ALLMULTI);
                                }
                        } else {
                                rc = cxgbe_init_synchronized(vi);
                        }
                        vi->if_flags = ifp->if_flags;
                } else if (ifp->if_drv_flags & IFF_DRV_RUNNING) {
                        rc = cxgbe_uninit_synchronized(vi);
                }
                end_synchronized_op(sc, 0);
                break;

        case SIOCADDMULTI:
        case SIOCDELMULTI:
                rc = begin_synchronized_op(sc, vi, SLEEP_OK | INTR_OK, "t4multi");
                if (rc)
                        return (rc);
                if (!hw_off_limits(sc) && ifp->if_drv_flags & IFF_DRV_RUNNING)
                        rc = update_mac_settings(ifp, XGMAC_MCADDRS);
                end_synchronized_op(sc, 0);
                break;

        case SIOCSIFCAP:
                rc = begin_synchronized_op(sc, vi, SLEEP_OK | INTR_OK, "t4cap");
                if (rc)
                        return (rc);

                mask = ifr->ifr_reqcap ^ ifp->if_capenable;
                if (mask & IFCAP_TXCSUM) {
                        ifp->if_capenable ^= IFCAP_TXCSUM;
                        ifp->if_hwassist ^= (CSUM_TCP | CSUM_UDP | CSUM_IP);

                        if (IFCAP_TSO4 & ifp->if_capenable &&
                            !(IFCAP_TXCSUM & ifp->if_capenable)) {
                                mask &= ~IFCAP_TSO4;
                                ifp->if_capenable &= ~IFCAP_TSO4;
                                if_printf(ifp,
                                    "tso4 disabled due to -txcsum.\n");
                        }
                }
                if (mask & IFCAP_TXCSUM_IPV6) {
                        ifp->if_capenable ^= IFCAP_TXCSUM_IPV6;
                        ifp->if_hwassist ^= (CSUM_UDP_IPV6 | CSUM_TCP_IPV6);

                        if (IFCAP_TSO6 & ifp->if_capenable &&
                            !(IFCAP_TXCSUM_IPV6 & ifp->if_capenable)) {
                                mask &= ~IFCAP_TSO6;
                                ifp->if_capenable &= ~IFCAP_TSO6;
                                if_printf(ifp,
                                    "tso6 disabled due to -txcsum6.\n");
                        }
                }
                if (mask & IFCAP_RXCSUM)
                        ifp->if_capenable ^= IFCAP_RXCSUM;
                if (mask & IFCAP_RXCSUM_IPV6)
                        ifp->if_capenable ^= IFCAP_RXCSUM_IPV6;

                /*
                 * Note that we leave CSUM_TSO alone (it is always set).  The
                 * kernel takes both IFCAP_TSOx and CSUM_TSO into account before
                 * sending a TSO request our way, so it's sufficient to toggle
                 * IFCAP_TSOx only.
                 */
                if (mask & IFCAP_TSO4) {
                        if (!(IFCAP_TSO4 & ifp->if_capenable) &&
                            !(IFCAP_TXCSUM & ifp->if_capenable)) {
                                if_printf(ifp, "enable txcsum first.\n");
                                rc = EAGAIN;
                                goto fail;
                        }
                        ifp->if_capenable ^= IFCAP_TSO4;
                }
                if (mask & IFCAP_TSO6) {
                        if (!(IFCAP_TSO6 & ifp->if_capenable) &&
                            !(IFCAP_TXCSUM_IPV6 & ifp->if_capenable)) {
                                if_printf(ifp, "enable txcsum6 first.\n");
                                rc = EAGAIN;
                                goto fail;
                        }
                        ifp->if_capenable ^= IFCAP_TSO6;
                }
                if (mask & IFCAP_LRO) {
#if defined(INET) || defined(INET6)
                        int i;
                        struct sge_rxq *rxq;

                        ifp->if_capenable ^= IFCAP_LRO;
                        for_each_rxq(vi, i, rxq) {
                                if (ifp->if_capenable & IFCAP_LRO)
                                        rxq->iq.flags |= IQ_LRO_ENABLED;
                                else
                                        rxq->iq.flags &= ~IQ_LRO_ENABLED;
                        }
#endif
                }
#ifdef TCP_OFFLOAD
                if (mask & IFCAP_TOE) {
                        int enable = (ifp->if_capenable ^ mask) & IFCAP_TOE;

                        rc = toe_capability(vi, enable);
                        if (rc != 0)
                                goto fail;

                        ifp->if_capenable ^= mask;
                }
#endif
                if (mask & IFCAP_VLAN_HWTAGGING) {
                        ifp->if_capenable ^= IFCAP_VLAN_HWTAGGING;
                        if (ifp->if_drv_flags & IFF_DRV_RUNNING)
                                rc = update_mac_settings(ifp, XGMAC_VLANEX);
                }
                if (mask & IFCAP_VLAN_MTU) {
                        ifp->if_capenable ^= IFCAP_VLAN_MTU;

                        /* Need to find out how to disable auto-mtu-inflation */
                }
                if (mask & IFCAP_VLAN_HWTSO)
                        ifp->if_capenable ^= IFCAP_VLAN_HWTSO;
                if (mask & IFCAP_VLAN_HWCSUM)
                        ifp->if_capenable ^= IFCAP_VLAN_HWCSUM;
#ifdef RATELIMIT
                if (mask & IFCAP_TXRTLMT)
                        ifp->if_capenable ^= IFCAP_TXRTLMT;
#endif
                if (mask & IFCAP_HWRXTSTMP) {
                        int i;
                        struct sge_rxq *rxq;

                        ifp->if_capenable ^= IFCAP_HWRXTSTMP;
                        for_each_rxq(vi, i, rxq) {
                                if (ifp->if_capenable & IFCAP_HWRXTSTMP)
                                        rxq->iq.flags |= IQ_RX_TIMESTAMP;
                                else
                                        rxq->iq.flags &= ~IQ_RX_TIMESTAMP;
                        }
                }
                if (mask & IFCAP_MEXTPG)
                        ifp->if_capenable ^= IFCAP_MEXTPG;

#ifdef KERN_TLS
                if (mask & IFCAP_TXTLS) {
                        int enable = (ifp->if_capenable ^ mask) & IFCAP_TXTLS;

                        rc = ktls_capability(sc, enable);
                        if (rc != 0)
                                goto fail;

                        ifp->if_capenable ^= (mask & IFCAP_TXTLS);
                }
#endif
                if (mask & IFCAP_VXLAN_HWCSUM) {
                        ifp->if_capenable ^= IFCAP_VXLAN_HWCSUM;
                        ifp->if_hwassist ^= CSUM_INNER_IP6_UDP |
                            CSUM_INNER_IP6_TCP | CSUM_INNER_IP |
                            CSUM_INNER_IP_UDP | CSUM_INNER_IP_TCP;
                }
                if (mask & IFCAP_VXLAN_HWTSO) {
                        ifp->if_capenable ^= IFCAP_VXLAN_HWTSO;
                        ifp->if_hwassist ^= CSUM_INNER_IP6_TSO |
                            CSUM_INNER_IP_TSO;
                }

#ifdef VLAN_CAPABILITIES
                VLAN_CAPABILITIES(ifp);
#endif
fail:
                end_synchronized_op(sc, 0);
                break;

        case SIOCSIFMEDIA:
        case SIOCGIFMEDIA:
        case SIOCGIFXMEDIA:
                ifmedia_ioctl(ifp, ifr, &pi->media, cmd);
                break;

        case SIOCGI2C: {
                struct ifi2creq i2c;

                rc = copyin(ifr_data_get_ptr(ifr), &i2c, sizeof(i2c));
                if (rc != 0)
                        break;
                if (i2c.dev_addr != 0xA0 && i2c.dev_addr != 0xA2) {
                        rc = EPERM;
                        break;
                }
                if (i2c.len > sizeof(i2c.data)) {
                        rc = EINVAL;
                        break;
                }
                rc = begin_synchronized_op(sc, vi, SLEEP_OK | INTR_OK, "t4i2c");
                if (rc)
                        return (rc);
                if (hw_off_limits(sc))
                        rc = ENXIO;
                else
                        rc = -t4_i2c_rd(sc, sc->mbox, pi->port_id, i2c.dev_addr,
                            i2c.offset, i2c.len, &i2c.data[0]);
                end_synchronized_op(sc, 0);
                if (rc == 0)
                        rc = copyout(&i2c, ifr_data_get_ptr(ifr), sizeof(i2c));
                break;
        }

        default:
                rc = ether_ioctl(ifp, cmd, data);
        }

        return (rc);
}

static int
cxgbe_transmit(struct ifnet *ifp, struct mbuf *m)
{
        struct vi_info *vi = ifp->if_softc;
        struct port_info *pi = vi->pi;
        struct adapter *sc;
        struct sge_txq *txq;
        void *items[1];
        int rc;

        M_ASSERTPKTHDR(m);
        MPASS(m->m_nextpkt == NULL);    /* not quite ready for this yet */
#if defined(KERN_TLS) || defined(RATELIMIT)
        if (m->m_pkthdr.csum_flags & CSUM_SND_TAG)
                MPASS(m->m_pkthdr.snd_tag->ifp == ifp);
#endif

        if (__predict_false(pi->link_cfg.link_ok == false)) {
                m_freem(m);
                return (ENETDOWN);
        }

        rc = parse_pkt(&m, vi->flags & TX_USES_VM_WR);
        if (__predict_false(rc != 0)) {
                MPASS(m == NULL);                       /* was freed already */
                atomic_add_int(&pi->tx_parse_error, 1); /* rare, atomic is ok */
                return (rc);
        }
#ifdef RATELIMIT
        if (m->m_pkthdr.csum_flags & CSUM_SND_TAG) {
                if (m->m_pkthdr.snd_tag->sw->type == IF_SND_TAG_TYPE_RATE_LIMIT)
                        return (ethofld_transmit(ifp, m));
        }
#endif

        /* Select a txq. */
        sc = vi->adapter;
        txq = &sc->sge.txq[vi->first_txq];
        if (M_HASHTYPE_GET(m) != M_HASHTYPE_NONE)
                txq += ((m->m_pkthdr.flowid % (vi->ntxq - vi->rsrv_noflowq)) +
                    vi->rsrv_noflowq);

        items[0] = m;
        rc = mp_ring_enqueue(txq->r, items, 1, 256);
        if (__predict_false(rc != 0))
                m_freem(m);

        return (rc);
}

static void
cxgbe_qflush(struct ifnet *ifp)
{
        struct vi_info *vi = ifp->if_softc;
        struct sge_txq *txq;
        int i;

        /* queues do not exist if !VI_INIT_DONE. */
        if (vi->flags & VI_INIT_DONE) {
                for_each_txq(vi, i, txq) {
                        TXQ_LOCK(txq);
                        txq->eq.flags |= EQ_QFLUSH;
                        TXQ_UNLOCK(txq);
                        while (!mp_ring_is_idle(txq->r)) {
                                mp_ring_check_drainage(txq->r, 4096);
                                pause("qflush", 1);
                        }
                        TXQ_LOCK(txq);
                        txq->eq.flags &= ~EQ_QFLUSH;
                        TXQ_UNLOCK(txq);
                }
        }
        if_qflush(ifp);
}

static uint64_t
vi_get_counter(struct ifnet *ifp, ift_counter c)
{
        struct vi_info *vi = ifp->if_softc;
        struct fw_vi_stats_vf *s = &vi->stats;

        mtx_lock(&vi->tick_mtx);
        vi_refresh_stats(vi);
        mtx_unlock(&vi->tick_mtx);

        switch (c) {
        case IFCOUNTER_IPACKETS:
                return (s->rx_bcast_frames + s->rx_mcast_frames +
                    s->rx_ucast_frames);
        case IFCOUNTER_IERRORS:
                return (s->rx_err_frames);
        case IFCOUNTER_OPACKETS:
                return (s->tx_bcast_frames + s->tx_mcast_frames +
                    s->tx_ucast_frames + s->tx_offload_frames);
        case IFCOUNTER_OERRORS:
                return (s->tx_drop_frames);
        case IFCOUNTER_IBYTES:
                return (s->rx_bcast_bytes + s->rx_mcast_bytes +
                    s->rx_ucast_bytes);
        case IFCOUNTER_OBYTES:
                return (s->tx_bcast_bytes + s->tx_mcast_bytes +
                    s->tx_ucast_bytes + s->tx_offload_bytes);
        case IFCOUNTER_IMCASTS:
                return (s->rx_mcast_frames);
        case IFCOUNTER_OMCASTS:
                return (s->tx_mcast_frames);
        case IFCOUNTER_OQDROPS: {
                uint64_t drops;

                drops = 0;
                if (vi->flags & VI_INIT_DONE) {
                        int i;
                        struct sge_txq *txq;

                        for_each_txq(vi, i, txq)
                                drops += counter_u64_fetch(txq->r->dropped);
                }

                return (drops);

        }

        default:
                return (if_get_counter_default(ifp, c));
        }
}

static uint64_t
cxgbe_get_counter(struct ifnet *ifp, ift_counter c)
{
        struct vi_info *vi = ifp->if_softc;
        struct port_info *pi = vi->pi;
        struct port_stats *s = &pi->stats;

        mtx_lock(&vi->tick_mtx);
        cxgbe_refresh_stats(vi);
        mtx_unlock(&vi->tick_mtx);

        switch (c) {
        case IFCOUNTER_IPACKETS:
                return (s->rx_frames);

        case IFCOUNTER_IERRORS:
                return (s->rx_jabber + s->rx_runt + s->rx_too_long +
                    s->rx_fcs_err + s->rx_len_err);

        case IFCOUNTER_OPACKETS:
                return (s->tx_frames);

        case IFCOUNTER_OERRORS:
                return (s->tx_error_frames);

        case IFCOUNTER_IBYTES:
                return (s->rx_octets);

        case IFCOUNTER_OBYTES:
                return (s->tx_octets);

        case IFCOUNTER_IMCASTS:
                return (s->rx_mcast_frames);

        case IFCOUNTER_OMCASTS:
                return (s->tx_mcast_frames);

        case IFCOUNTER_IQDROPS:
                return (s->rx_ovflow0 + s->rx_ovflow1 + s->rx_ovflow2 +
                    s->rx_ovflow3 + s->rx_trunc0 + s->rx_trunc1 + s->rx_trunc2 +
                    s->rx_trunc3 + pi->tnl_cong_drops);

        case IFCOUNTER_OQDROPS: {
                uint64_t drops;

                drops = s->tx_drop;
                if (vi->flags & VI_INIT_DONE) {
                        int i;
                        struct sge_txq *txq;

                        for_each_txq(vi, i, txq)
                                drops += counter_u64_fetch(txq->r->dropped);
                }

                return (drops);

        }

        default:
                return (if_get_counter_default(ifp, c));
        }
}

#if defined(KERN_TLS) || defined(RATELIMIT)
static int
cxgbe_snd_tag_alloc(struct ifnet *ifp, union if_snd_tag_alloc_params *params,
    struct m_snd_tag **pt)
{
        int error;

        switch (params->hdr.type) {
#ifdef RATELIMIT
        case IF_SND_TAG_TYPE_RATE_LIMIT:
                error = cxgbe_rate_tag_alloc(ifp, params, pt);
                break;
#endif
#ifdef KERN_TLS
        case IF_SND_TAG_TYPE_TLS:
                error = cxgbe_tls_tag_alloc(ifp, params, pt);
                break;
#endif
        default:
                error = EOPNOTSUPP;
        }
        return (error);
}
#endif

/*
 * The kernel picks a media from the list we had provided but we still validate
 * the requeste.
 */
int
cxgbe_media_change(struct ifnet *ifp)
{
        struct vi_info *vi = ifp->if_softc;
        struct port_info *pi = vi->pi;
        struct ifmedia *ifm = &pi->media;
        struct link_config *lc = &pi->link_cfg;
        struct adapter *sc = pi->adapter;
        int rc;

        rc = begin_synchronized_op(sc, NULL, SLEEP_OK | INTR_OK, "t4mec");
        if (rc != 0)
                return (rc);
        PORT_LOCK(pi);
        if (IFM_SUBTYPE(ifm->ifm_media) == IFM_AUTO) {
                /* ifconfig .. media autoselect */
                if (!(lc->pcaps & FW_PORT_CAP32_ANEG)) {
                        rc = ENOTSUP; /* AN not supported by transceiver */
                        goto done;
                }
                lc->requested_aneg = AUTONEG_ENABLE;
                lc->requested_speed = 0;
                lc->requested_fc |= PAUSE_AUTONEG;
        } else {
                lc->requested_aneg = AUTONEG_DISABLE;
                lc->requested_speed =
                    ifmedia_baudrate(ifm->ifm_media) / 1000000;
                lc->requested_fc = 0;
                if (IFM_OPTIONS(ifm->ifm_media) & IFM_ETH_RXPAUSE)
                        lc->requested_fc |= PAUSE_RX;
                if (IFM_OPTIONS(ifm->ifm_media) & IFM_ETH_TXPAUSE)
                        lc->requested_fc |= PAUSE_TX;
        }
        if (pi->up_vis > 0) {
                fixup_link_config(pi);
                rc = apply_link_config(pi);
        }
done:
        PORT_UNLOCK(pi);
        end_synchronized_op(sc, 0);
        return (rc);
}

/*
 * Base media word (without ETHER, pause, link active, etc.) for the port at the
 * given speed.
 */
static int
port_mword(struct port_info *pi, uint32_t speed)
{

        MPASS(speed & M_FW_PORT_CAP32_SPEED);
        MPASS(powerof2(speed));

        switch(pi->port_type) {
        case FW_PORT_TYPE_BT_SGMII:
        case FW_PORT_TYPE_BT_XFI:
        case FW_PORT_TYPE_BT_XAUI:
                /* BaseT */
                switch (speed) {
                case FW_PORT_CAP32_SPEED_100M:
                        return (IFM_100_T);
                case FW_PORT_CAP32_SPEED_1G:
                        return (IFM_1000_T);
                case FW_PORT_CAP32_SPEED_10G:
                        return (IFM_10G_T);
                }
                break;
        case FW_PORT_TYPE_KX4:
                if (speed == FW_PORT_CAP32_SPEED_10G)
                        return (IFM_10G_KX4);
                break;
        case FW_PORT_TYPE_CX4:
                if (speed == FW_PORT_CAP32_SPEED_10G)
                        return (IFM_10G_CX4);
                break;
        case FW_PORT_TYPE_KX:
                if (speed == FW_PORT_CAP32_SPEED_1G)
                        return (IFM_1000_KX);
                break;
        case FW_PORT_TYPE_KR:
        case FW_PORT_TYPE_BP_AP:
        case FW_PORT_TYPE_BP4_AP:
        case FW_PORT_TYPE_BP40_BA:
        case FW_PORT_TYPE_KR4_100G:
        case FW_PORT_TYPE_KR_SFP28:
        case FW_PORT_TYPE_KR_XLAUI:
                switch (speed) {
                case FW_PORT_CAP32_SPEED_1G:
                        return (IFM_1000_KX);
                case FW_PORT_CAP32_SPEED_10G:
                        return (IFM_10G_KR);
                case FW_PORT_CAP32_SPEED_25G:
                        return (IFM_25G_KR);
                case FW_PORT_CAP32_SPEED_40G:
                        return (IFM_40G_KR4);
                case FW_PORT_CAP32_SPEED_50G:
                        return (IFM_50G_KR2);
                case FW_PORT_CAP32_SPEED_100G:
                        return (IFM_100G_KR4);
                }
                break;
        case FW_PORT_TYPE_FIBER_XFI:
        case FW_PORT_TYPE_FIBER_XAUI:
        case FW_PORT_TYPE_SFP:
        case FW_PORT_TYPE_QSFP_10G:
        case FW_PORT_TYPE_QSA:
        case FW_PORT_TYPE_QSFP:
        case FW_PORT_TYPE_CR4_QSFP:
        case FW_PORT_TYPE_CR_QSFP:
        case FW_PORT_TYPE_CR2_QSFP:
        case FW_PORT_TYPE_SFP28:
                /* Pluggable transceiver */
                switch (pi->mod_type) {
                case FW_PORT_MOD_TYPE_LR:
                        switch (speed) {
                        case FW_PORT_CAP32_SPEED_1G:
                                return (IFM_1000_LX);
                        case FW_PORT_CAP32_SPEED_10G:
                                return (IFM_10G_LR);
                        case FW_PORT_CAP32_SPEED_25G:
                                return (IFM_25G_LR);
                        case FW_PORT_CAP32_SPEED_40G:
                                return (IFM_40G_LR4);
                        case FW_PORT_CAP32_SPEED_50G:
                                return (IFM_50G_LR2);
                        case FW_PORT_CAP32_SPEED_100G:
                                return (IFM_100G_LR4);
                        }
                        break;
                case FW_PORT_MOD_TYPE_SR:
                        switch (speed) {
                        case FW_PORT_CAP32_SPEED_1G:
                                return (IFM_1000_SX);
                        case FW_PORT_CAP32_SPEED_10G:
                                return (IFM_10G_SR);
                        case FW_PORT_CAP32_SPEED_25G:
                                return (IFM_25G_SR);
                        case FW_PORT_CAP32_SPEED_40G:
                                return (IFM_40G_SR4);
                        case FW_PORT_CAP32_SPEED_50G:
                                return (IFM_50G_SR2);
                        case FW_PORT_CAP32_SPEED_100G:
                                return (IFM_100G_SR4);
                        }
                        break;
                case FW_PORT_MOD_TYPE_ER:
                        if (speed == FW_PORT_CAP32_SPEED_10G)
                                return (IFM_10G_ER);
                        break;
                case FW_PORT_MOD_TYPE_TWINAX_PASSIVE:
                case FW_PORT_MOD_TYPE_TWINAX_ACTIVE:
                        switch (speed) {
                        case FW_PORT_CAP32_SPEED_1G:
                                return (IFM_1000_CX);
                        case FW_PORT_CAP32_SPEED_10G:
                                return (IFM_10G_TWINAX);
                        case FW_PORT_CAP32_SPEED_25G:
                                return (IFM_25G_CR);
                        case FW_PORT_CAP32_SPEED_40G:
                                return (IFM_40G_CR4);
                        case FW_PORT_CAP32_SPEED_50G:
                                return (IFM_50G_CR2);
                        case FW_PORT_CAP32_SPEED_100G:
                                return (IFM_100G_CR4);
                        }
                        break;
                case FW_PORT_MOD_TYPE_LRM:
                        if (speed == FW_PORT_CAP32_SPEED_10G)
                                return (IFM_10G_LRM);
                        break;
                case FW_PORT_MOD_TYPE_NA:
                        MPASS(0);       /* Not pluggable? */
                        /* fall throough */
                case FW_PORT_MOD_TYPE_ERROR:
                case FW_PORT_MOD_TYPE_UNKNOWN:
                case FW_PORT_MOD_TYPE_NOTSUPPORTED:
                        break;
                case FW_PORT_MOD_TYPE_NONE:
                        return (IFM_NONE);
                }
                break;
        case FW_PORT_TYPE_NONE:
                return (IFM_NONE);
        }

        return (IFM_UNKNOWN);
}

void
cxgbe_media_status(struct ifnet *ifp, struct ifmediareq *ifmr)
{
        struct vi_info *vi = ifp->if_softc;
        struct port_info *pi = vi->pi;
        struct adapter *sc = pi->adapter;
        struct link_config *lc = &pi->link_cfg;

        if (begin_synchronized_op(sc, NULL, SLEEP_OK | INTR_OK, "t4med") != 0)
                return;
        PORT_LOCK(pi);

        if (pi->up_vis == 0) {
                /*
                 * If all the interfaces are administratively down the firmware
                 * does not report transceiver changes.  Refresh port info here
                 * so that ifconfig displays accurate ifmedia at all times.
                 * This is the only reason we have a synchronized op in this
                 * function.  Just PORT_LOCK would have been enough otherwise.
                 */
                t4_update_port_info(pi);
                build_medialist(pi);
        }

        /* ifm_status */
        ifmr->ifm_status = IFM_AVALID;
        if (lc->link_ok == false)
                goto done;
        ifmr->ifm_status |= IFM_ACTIVE;

        /* ifm_active */
        ifmr->ifm_active = IFM_ETHER | IFM_FDX;
        ifmr->ifm_active &= ~(IFM_ETH_TXPAUSE | IFM_ETH_RXPAUSE);
        if (lc->fc & PAUSE_RX)
                ifmr->ifm_active |= IFM_ETH_RXPAUSE;
        if (lc->fc & PAUSE_TX)
                ifmr->ifm_active |= IFM_ETH_TXPAUSE;
        ifmr->ifm_active |= port_mword(pi, speed_to_fwcap(lc->speed));
done:
        PORT_UNLOCK(pi);
        end_synchronized_op(sc, 0);
}

static int
vcxgbe_probe(device_t dev)
{
        char buf[128];
        struct vi_info *vi = device_get_softc(dev);

        snprintf(buf, sizeof(buf), "port %d vi %td", vi->pi->port_id,
            vi - vi->pi->vi);
        device_set_desc_copy(dev, buf);

        return (BUS_PROBE_DEFAULT);
}

static int
alloc_extra_vi(struct adapter *sc, struct port_info *pi, struct vi_info *vi)
{
        int func, index, rc;
        uint32_t param, val;

        ASSERT_SYNCHRONIZED_OP(sc);

        index = vi - pi->vi;
        MPASS(index > 0);       /* This function deals with _extra_ VIs only */
        KASSERT(index < nitems(vi_mac_funcs),
            ("%s: VI %s doesn't have a MAC func", __func__,
            device_get_nameunit(vi->dev)));
        func = vi_mac_funcs[index];
        rc = t4_alloc_vi_func(sc, sc->mbox, pi->tx_chan, sc->pf, 0, 1,
            vi->hw_addr, &vi->rss_size, &vi->vfvld, &vi->vin, func, 0);
        if (rc < 0) {
                CH_ERR(vi, "failed to allocate virtual interface %d"
                    "for port %d: %d\n", index, pi->port_id, -rc);
                return (-rc);
        }
        vi->viid = rc;

        if (vi->rss_size == 1) {
                /*
                 * This VI didn't get a slice of the RSS table.  Reduce the
                 * number of VIs being created (hw.cxgbe.num_vis) or modify the
                 * configuration file (nvi, rssnvi for this PF) if this is a
                 * problem.
                 */
                device_printf(vi->dev, "RSS table not available.\n");
                vi->rss_base = 0xffff;

                return (0);
        }

        param = V_FW_PARAMS_MNEM(FW_PARAMS_MNEM_DEV) |
            V_FW_PARAMS_PARAM_X(FW_PARAMS_PARAM_DEV_RSSINFO) |
            V_FW_PARAMS_PARAM_YZ(vi->viid);
        rc = t4_query_params(sc, sc->mbox, sc->pf, 0, 1, &param, &val);
        if (rc)
                vi->rss_base = 0xffff;
        else {
                MPASS((val >> 16) == vi->rss_size);
                vi->rss_base = val & 0xffff;
        }

        return (0);
}

static int
vcxgbe_attach(device_t dev)
{
        struct vi_info *vi;
        struct port_info *pi;
        struct adapter *sc;
        int rc;

        vi = device_get_softc(dev);
        pi = vi->pi;
        sc = pi->adapter;

        rc = begin_synchronized_op(sc, vi, SLEEP_OK | INTR_OK, "t4via");
        if (rc)
                return (rc);
        rc = alloc_extra_vi(sc, pi, vi);
        end_synchronized_op(sc, 0);
        if (rc)
                return (rc);

        rc = cxgbe_vi_attach(dev, vi);
        if (rc) {
                t4_free_vi(sc, sc->mbox, sc->pf, 0, vi->viid);
                return (rc);
        }
        return (0);
}

static int
vcxgbe_detach(device_t dev)
{
        struct vi_info *vi;
        struct adapter *sc;

        vi = device_get_softc(dev);
        sc = vi->adapter;

        doom_vi(sc, vi);

        cxgbe_vi_detach(vi);
        t4_free_vi(sc, sc->mbox, sc->pf, 0, vi->viid);

        end_synchronized_op(sc, 0);

        return (0);
}

static struct callout fatal_callout;
static struct taskqueue *reset_tq;

static void
delayed_panic(void *arg)
{
        struct adapter *sc = arg;

        panic("%s: panic on fatal error", device_get_nameunit(sc->dev));
}

void
t4_fatal_err(struct adapter *sc, bool fw_error)
{

        t4_shutdown_adapter(sc);
        log(LOG_ALERT, "%s: encountered fatal error, adapter stopped.\n",
            device_get_nameunit(sc->dev));
        if (fw_error) {
                if (sc->flags & CHK_MBOX_ACCESS)
                        ASSERT_SYNCHRONIZED_OP(sc);
                sc->flags |= ADAP_ERR;
        } else {
                ADAPTER_LOCK(sc);
                sc->flags |= ADAP_ERR;
                ADAPTER_UNLOCK(sc);
        }
#ifdef TCP_OFFLOAD
        taskqueue_enqueue(taskqueue_thread, &sc->async_event_task);
#endif

        if (t4_panic_on_fatal_err) {
                CH_ALERT(sc, "panicking on fatal error (after 30s).\n");
                callout_reset(&fatal_callout, hz * 30, delayed_panic, sc);
        } else if (t4_reset_on_fatal_err) {
                CH_ALERT(sc, "resetting on fatal error.\n");
                taskqueue_enqueue(reset_tq, &sc->reset_task);
        }
}

void
t4_add_adapter(struct adapter *sc)
{
        sx_xlock(&t4_list_lock);
        SLIST_INSERT_HEAD(&t4_list, sc, link);
        sx_xunlock(&t4_list_lock);
}

int
t4_map_bars_0_and_4(struct adapter *sc)
{
        sc->regs_rid = PCIR_BAR(0);
        sc->regs_res = bus_alloc_resource_any(sc->dev, SYS_RES_MEMORY,
            &sc->regs_rid, RF_ACTIVE);
        if (sc->regs_res == NULL) {
                device_printf(sc->dev, "cannot map registers.\n");
                return (ENXIO);
        }
        sc->bt = rman_get_bustag(sc->regs_res);
        sc->bh = rman_get_bushandle(sc->regs_res);
        sc->mmio_len = rman_get_size(sc->regs_res);
        setbit(&sc->doorbells, DOORBELL_KDB);

        sc->msix_rid = PCIR_BAR(4);
        sc->msix_res = bus_alloc_resource_any(sc->dev, SYS_RES_MEMORY,
            &sc->msix_rid, RF_ACTIVE);
        if (sc->msix_res == NULL) {
                device_printf(sc->dev, "cannot map MSI-X BAR.\n");
                return (ENXIO);
        }

        return (0);
}

int
t4_map_bar_2(struct adapter *sc)
{

        /*
         * T4: only iWARP driver uses the userspace doorbells.  There is no need
         * to map it if RDMA is disabled.
         */
        if (is_t4(sc) && sc->rdmacaps == 0)
                return (0);

        sc->udbs_rid = PCIR_BAR(2);
        sc->udbs_res = bus_alloc_resource_any(sc->dev, SYS_RES_MEMORY,
            &sc->udbs_rid, RF_ACTIVE);
        if (sc->udbs_res == NULL) {
                device_printf(sc->dev, "cannot map doorbell BAR.\n");
                return (ENXIO);
        }
        sc->udbs_base = rman_get_virtual(sc->udbs_res);

        if (chip_id(sc) >= CHELSIO_T5) {
                setbit(&sc->doorbells, DOORBELL_UDB);
#if defined(__i386__) || defined(__amd64__)
                if (t5_write_combine) {
                        int rc, mode;

                        /*
                         * Enable write combining on BAR2.  This is the
                         * userspace doorbell BAR and is split into 128B
                         * (UDBS_SEG_SIZE) doorbell regions, each associated
                         * with an egress queue.  The first 64B has the doorbell
                         * and the second 64B can be used to submit a tx work
                         * request with an implicit doorbell.
                         */

                        rc = pmap_change_attr((vm_offset_t)sc->udbs_base,
                            rman_get_size(sc->udbs_res), PAT_WRITE_COMBINING);
                        if (rc == 0) {
                                clrbit(&sc->doorbells, DOORBELL_UDB);
                                setbit(&sc->doorbells, DOORBELL_WCWR);
                                setbit(&sc->doorbells, DOORBELL_UDBWC);
                        } else {
                                device_printf(sc->dev,
                                    "couldn't enable write combining: %d\n",
                                    rc);
                        }

                        mode = is_t5(sc) ? V_STATMODE(0) : V_T6_STATMODE(0);
                        t4_write_reg(sc, A_SGE_STAT_CFG,
                            V_STATSOURCE_T5(7) | mode);
                }
#endif
        }
        sc->iwt.wc_en = isset(&sc->doorbells, DOORBELL_UDBWC) ? 1 : 0;

        return (0);
}

struct memwin_init {
        uint32_t base;
        uint32_t aperture;
};

static const struct memwin_init t4_memwin[NUM_MEMWIN] = {
        { MEMWIN0_BASE, MEMWIN0_APERTURE },
        { MEMWIN1_BASE, MEMWIN1_APERTURE },
        { MEMWIN2_BASE_T4, MEMWIN2_APERTURE_T4 }
};

static const struct memwin_init t5_memwin[NUM_MEMWIN] = {
        { MEMWIN0_BASE, MEMWIN0_APERTURE },
        { MEMWIN1_BASE, MEMWIN1_APERTURE },
        { MEMWIN2_BASE_T5, MEMWIN2_APERTURE_T5 },
};

static void
setup_memwin(struct adapter *sc)
{
        const struct memwin_init *mw_init;
        struct memwin *mw;
        int i;
        uint32_t bar0;

        if (is_t4(sc)) {
                /*
                 * Read low 32b of bar0 indirectly via the hardware backdoor
                 * mechanism.  Works from within PCI passthrough environments
                 * too, where rman_get_start() can return a different value.  We
                 * need to program the T4 memory window decoders with the actual
                 * addresses that will be coming across the PCIe link.
                 */
                bar0 = t4_hw_pci_read_cfg4(sc, PCIR_BAR(0));
                bar0 &= (uint32_t) PCIM_BAR_MEM_BASE;

                mw_init = &t4_memwin[0];
        } else {
                /* T5+ use the relative offset inside the PCIe BAR */
                bar0 = 0;

                mw_init = &t5_memwin[0];
        }

        for (i = 0, mw = &sc->memwin[0]; i < NUM_MEMWIN; i++, mw_init++, mw++) {
                if (!rw_initialized(&mw->mw_lock)) {
                        rw_init(&mw->mw_lock, "memory window access");
                        mw->mw_base = mw_init->base;
                        mw->mw_aperture = mw_init->aperture;
                        mw->mw_curpos = 0;
                }
                t4_write_reg(sc,
                    PCIE_MEM_ACCESS_REG(A_PCIE_MEM_ACCESS_BASE_WIN, i),
                    (mw->mw_base + bar0) | V_BIR(0) |
                    V_WINDOW(ilog2(mw->mw_aperture) - 10));
                rw_wlock(&mw->mw_lock);
                position_memwin(sc, i, mw->mw_curpos);
                rw_wunlock(&mw->mw_lock);
        }

        /* flush */
        t4_read_reg(sc, PCIE_MEM_ACCESS_REG(A_PCIE_MEM_ACCESS_BASE_WIN, 2));
}

/*
 * Positions the memory window at the given address in the card's address space.
 * There are some alignment requirements and the actual position may be at an
 * address prior to the requested address.  mw->mw_curpos always has the actual
 * position of the window.
 */
static void
position_memwin(struct adapter *sc, int idx, uint32_t addr)
{
        struct memwin *mw;
        uint32_t pf;
        uint32_t reg;

        MPASS(idx >= 0 && idx < NUM_MEMWIN);
        mw = &sc->memwin[idx];
        rw_assert(&mw->mw_lock, RA_WLOCKED);

        if (is_t4(sc)) {
                pf = 0;
                mw->mw_curpos = addr & ~0xf;    /* start must be 16B aligned */
        } else {
                pf = V_PFNUM(sc->pf);
                mw->mw_curpos = addr & ~0x7f;   /* start must be 128B aligned */
        }
        reg = PCIE_MEM_ACCESS_REG(A_PCIE_MEM_ACCESS_OFFSET, idx);
        t4_write_reg(sc, reg, mw->mw_curpos | pf);
        t4_read_reg(sc, reg);   /* flush */
}

int
rw_via_memwin(struct adapter *sc, int idx, uint32_t addr, uint32_t *val,
    int len, int rw)
{
        struct memwin *mw;
        uint32_t mw_end, v;

        MPASS(idx >= 0 && idx < NUM_MEMWIN);

        /* Memory can only be accessed in naturally aligned 4 byte units */
        if (addr & 3 || len & 3 || len <= 0)
                return (EINVAL);

        mw = &sc->memwin[idx];
        while (len > 0) {
                rw_rlock(&mw->mw_lock);
                mw_end = mw->mw_curpos + mw->mw_aperture;
                if (addr >= mw_end || addr < mw->mw_curpos) {
                        /* Will need to reposition the window */
                        if (!rw_try_upgrade(&mw->mw_lock)) {
                                rw_runlock(&mw->mw_lock);
                                rw_wlock(&mw->mw_lock);
                        }
                        rw_assert(&mw->mw_lock, RA_WLOCKED);
                        position_memwin(sc, idx, addr);
                        rw_downgrade(&mw->mw_lock);
                        mw_end = mw->mw_curpos + mw->mw_aperture;
                }
                rw_assert(&mw->mw_lock, RA_RLOCKED);
                while (addr < mw_end && len > 0) {
                        if (rw == 0) {
                                v = t4_read_reg(sc, mw->mw_base + addr -
                                    mw->mw_curpos);
                                *val++ = le32toh(v);
                        } else {
                                v = *val++;
                                t4_write_reg(sc, mw->mw_base + addr -
                                    mw->mw_curpos, htole32(v));
                        }
                        addr += 4;
                        len -= 4;
                }
                rw_runlock(&mw->mw_lock);
        }

        return (0);
}

static void
t4_init_atid_table(struct adapter *sc)
{
        struct tid_info *t;
        int i;

        t = &sc->tids;
        if (t->natids == 0)
                return;

        MPASS(t->atid_tab == NULL);

        t->atid_tab = malloc(t->natids * sizeof(*t->atid_tab), M_CXGBE,
            M_ZERO | M_WAITOK);
        mtx_init(&t->atid_lock, "atid lock", NULL, MTX_DEF);
        t->afree = t->atid_tab;
        t->atids_in_use = 0;
        for (i = 1; i < t->natids; i++)
                t->atid_tab[i - 1].next = &t->atid_tab[i];
        t->atid_tab[t->natids - 1].next = NULL;
}

static void
t4_free_atid_table(struct adapter *sc)
{
        struct tid_info *t;

        t = &sc->tids;

        KASSERT(t->atids_in_use == 0,
            ("%s: %d atids still in use.", __func__, t->atids_in_use));

        if (mtx_initialized(&t->atid_lock))
                mtx_destroy(&t->atid_lock);
        free(t->atid_tab, M_CXGBE);
        t->atid_tab = NULL;
}

int
alloc_atid(struct adapter *sc, void *ctx)
{
        struct tid_info *t = &sc->tids;
        int atid = -1;

        mtx_lock(&t->atid_lock);
        if (t->afree) {
                union aopen_entry *p = t->afree;

                atid = p - t->atid_tab;
                MPASS(atid <= M_TID_TID);
                t->afree = p->next;
                p->data = ctx;
                t->atids_in_use++;
        }
        mtx_unlock(&t->atid_lock);
        return (atid);
}

void *
lookup_atid(struct adapter *sc, int atid)
{
        struct tid_info *t = &sc->tids;

        return (t->atid_tab[atid].data);
}

void
free_atid(struct adapter *sc, int atid)
{
        struct tid_info *t = &sc->tids;
        union aopen_entry *p = &t->atid_tab[atid];

        mtx_lock(&t->atid_lock);
        p->next = t->afree;
        t->afree = p;
        t->atids_in_use--;
        mtx_unlock(&t->atid_lock);
}

static void
queue_tid_release(struct adapter *sc, int tid)
{

        CXGBE_UNIMPLEMENTED("deferred tid release");
}

void
release_tid(struct adapter *sc, int tid, struct sge_wrq *ctrlq)
{
        struct wrqe *wr;
        struct cpl_tid_release *req;

        wr = alloc_wrqe(sizeof(*req), ctrlq);
        if (wr == NULL) {
                queue_tid_release(sc, tid);     /* defer */
                return;
        }
        req = wrtod(wr);

        INIT_TP_WR_MIT_CPL(req, CPL_TID_RELEASE, tid);

        t4_wrq_tx(sc, wr);
}

static int
t4_range_cmp(const void *a, const void *b)
{
        return ((const struct t4_range *)a)->start -
               ((const struct t4_range *)b)->start;
}

/*
 * Verify that the memory range specified by the addr/len pair is valid within
 * the card's address space.
 */
static int
validate_mem_range(struct adapter *sc, uint32_t addr, uint32_t len)
{
        struct t4_range mem_ranges[4], *r, *next;
        uint32_t em, addr_len;
        int i, n, remaining;

        /* Memory can only be accessed in naturally aligned 4 byte units */
        if (addr & 3 || len & 3 || len == 0)
                return (EINVAL);

        /* Enabled memories */
        em = t4_read_reg(sc, A_MA_TARGET_MEM_ENABLE);

        r = &mem_ranges[0];
        n = 0;
        bzero(r, sizeof(mem_ranges));
        if (em & F_EDRAM0_ENABLE) {
                addr_len = t4_read_reg(sc, A_MA_EDRAM0_BAR);
                r->size = G_EDRAM0_SIZE(addr_len) << 20;
                if (r->size > 0) {
                        r->start = G_EDRAM0_BASE(addr_len) << 20;
                        if (addr >= r->start &&
                            addr + len <= r->start + r->size)
                                return (0);
                        r++;
                        n++;
                }
        }
        if (em & F_EDRAM1_ENABLE) {
                addr_len = t4_read_reg(sc, A_MA_EDRAM1_BAR);
                r->size = G_EDRAM1_SIZE(addr_len) << 20;
                if (r->size > 0) {
                        r->start = G_EDRAM1_BASE(addr_len) << 20;
                        if (addr >= r->start &&
                            addr + len <= r->start + r->size)
                                return (0);
                        r++;
                        n++;
                }
        }
        if (em & F_EXT_MEM_ENABLE) {
                addr_len = t4_read_reg(sc, A_MA_EXT_MEMORY_BAR);
                r->size = G_EXT_MEM_SIZE(addr_len) << 20;
                if (r->size > 0) {
                        r->start = G_EXT_MEM_BASE(addr_len) << 20;
                        if (addr >= r->start &&
                            addr + len <= r->start + r->size)
                                return (0);
                        r++;
                        n++;
                }
        }
        if (is_t5(sc) && em & F_EXT_MEM1_ENABLE) {
                addr_len = t4_read_reg(sc, A_MA_EXT_MEMORY1_BAR);
                r->size = G_EXT_MEM1_SIZE(addr_len) << 20;
                if (r->size > 0) {
                        r->start = G_EXT_MEM1_BASE(addr_len) << 20;
                        if (addr >= r->start &&
                            addr + len <= r->start + r->size)
                                return (0);
                        r++;
                        n++;
                }
        }
        MPASS(n <= nitems(mem_ranges));

        if (n > 1) {
                /* Sort and merge the ranges. */
                qsort(mem_ranges, n, sizeof(struct t4_range), t4_range_cmp);

                /* Start from index 0 and examine the next n - 1 entries. */
                r = &mem_ranges[0];
                for (remaining = n - 1; remaining > 0; remaining--, r++) {

                        MPASS(r->size > 0);     /* r is a valid entry. */
                        next = r + 1;
                        MPASS(next->size > 0);  /* and so is the next one. */

                        while (r->start + r->size >= next->start) {
                                /* Merge the next one into the current entry. */
                                r->size = max(r->start + r->size,
                                    next->start + next->size) - r->start;
                                n--;    /* One fewer entry in total. */
                                if (--remaining == 0)
                                        goto done;      /* short circuit */
                                next++;
                        }
                        if (next != r + 1) {
                                /*
                                 * Some entries were merged into r and next
                                 * points to the first valid entry that couldn't
                                 * be merged.
                                 */
                                MPASS(next->size > 0);  /* must be valid */
                                memcpy(r + 1, next, remaining * sizeof(*r));
#ifdef INVARIANTS
                                /*
                                 * This so that the foo->size assertion in the
                                 * next iteration of the loop do the right
                                 * thing for entries that were pulled up and are
                                 * no longer valid.
                                 */
                                MPASS(n < nitems(mem_ranges));
                                bzero(&mem_ranges[n], (nitems(mem_ranges) - n) *
                                    sizeof(struct t4_range));
#endif
                        }
                }
done:
                /* Done merging the ranges. */
                MPASS(n > 0);
                r = &mem_ranges[0];
                for (i = 0; i < n; i++, r++) {
                        if (addr >= r->start &&
                            addr + len <= r->start + r->size)
                                return (0);
                }
        }

        return (EFAULT);
}

static int
fwmtype_to_hwmtype(int mtype)
{

        switch (mtype) {
        case FW_MEMTYPE_EDC0:
                return (MEM_EDC0);
        case FW_MEMTYPE_EDC1:
                return (MEM_EDC1);
        case FW_MEMTYPE_EXTMEM:
                return (MEM_MC0);
        case FW_MEMTYPE_EXTMEM1:
                return (MEM_MC1);
        default:
                panic("%s: cannot translate fw mtype %d.", __func__, mtype);
        }
}

/*
 * Verify that the memory range specified by the memtype/offset/len pair is
 * valid and lies entirely within the memtype specified.  The global address of
 * the start of the range is returned in addr.
 */
static int
validate_mt_off_len(struct adapter *sc, int mtype, uint32_t off, uint32_t len,
    uint32_t *addr)
{
        uint32_t em, addr_len, maddr;

        /* Memory can only be accessed in naturally aligned 4 byte units */
        if (off & 3 || len & 3 || len == 0)
                return (EINVAL);

        em = t4_read_reg(sc, A_MA_TARGET_MEM_ENABLE);
        switch (fwmtype_to_hwmtype(mtype)) {
        case MEM_EDC0:
                if (!(em & F_EDRAM0_ENABLE))
                        return (EINVAL);
                addr_len = t4_read_reg(sc, A_MA_EDRAM0_BAR);
                maddr = G_EDRAM0_BASE(addr_len) << 20;
                break;
        case MEM_EDC1:
                if (!(em & F_EDRAM1_ENABLE))
                        return (EINVAL);
                addr_len = t4_read_reg(sc, A_MA_EDRAM1_BAR);
                maddr = G_EDRAM1_BASE(addr_len) << 20;
                break;
        case MEM_MC:
                if (!(em & F_EXT_MEM_ENABLE))
                        return (EINVAL);
                addr_len = t4_read_reg(sc, A_MA_EXT_MEMORY_BAR);
                maddr = G_EXT_MEM_BASE(addr_len) << 20;
                break;
        case MEM_MC1:
                if (!is_t5(sc) || !(em & F_EXT_MEM1_ENABLE))
                        return (EINVAL);
                addr_len = t4_read_reg(sc, A_MA_EXT_MEMORY1_BAR);
                maddr = G_EXT_MEM1_BASE(addr_len) << 20;
                break;
        default:
                return (EINVAL);
        }

        *addr = maddr + off;    /* global address */
        return (validate_mem_range(sc, *addr, len));
}

static int
fixup_devlog_params(struct adapter *sc)
{
        struct devlog_params *dparams = &sc->params.devlog;
        int rc;

        rc = validate_mt_off_len(sc, dparams->memtype, dparams->start,
            dparams->size, &dparams->addr);

        return (rc);
}

static void
update_nirq(struct intrs_and_queues *iaq, int nports)
{

        iaq->nirq = T4_EXTRA_INTR;
        iaq->nirq += nports * max(iaq->nrxq, iaq->nnmrxq);
        iaq->nirq += nports * iaq->nofldrxq;
        iaq->nirq += nports * (iaq->num_vis - 1) *
            max(iaq->nrxq_vi, iaq->nnmrxq_vi);
        iaq->nirq += nports * (iaq->num_vis - 1) * iaq->nofldrxq_vi;
}

/*
 * Adjust requirements to fit the number of interrupts available.
 */
static void
calculate_iaq(struct adapter *sc, struct intrs_and_queues *iaq, int itype,
    int navail)
{
        int old_nirq;
        const int nports = sc->params.nports;

        MPASS(nports > 0);
        MPASS(navail > 0);

        bzero(iaq, sizeof(*iaq));
        iaq->intr_type = itype;
        iaq->num_vis = t4_num_vis;
        iaq->ntxq = t4_ntxq;
        iaq->ntxq_vi = t4_ntxq_vi;
        iaq->nrxq = t4_nrxq;
        iaq->nrxq_vi = t4_nrxq_vi;
#if defined(TCP_OFFLOAD) || defined(RATELIMIT)
        if (is_offload(sc) || is_ethoffload(sc)) {
                iaq->nofldtxq = t4_nofldtxq;
                iaq->nofldtxq_vi = t4_nofldtxq_vi;
        }
#endif
#ifdef TCP_OFFLOAD
        if (is_offload(sc)) {
                iaq->nofldrxq = t4_nofldrxq;
                iaq->nofldrxq_vi = t4_nofldrxq_vi;
        }
#endif
#ifdef DEV_NETMAP
        if (t4_native_netmap & NN_MAIN_VI) {
                iaq->nnmtxq = t4_nnmtxq;
                iaq->nnmrxq = t4_nnmrxq;
        }
        if (t4_native_netmap & NN_EXTRA_VI) {
                iaq->nnmtxq_vi = t4_nnmtxq_vi;
                iaq->nnmrxq_vi = t4_nnmrxq_vi;
        }
#endif

        update_nirq(iaq, nports);
        if (iaq->nirq <= navail &&
            (itype != INTR_MSI || powerof2(iaq->nirq))) {
                /*
                 * This is the normal case -- there are enough interrupts for
                 * everything.
                 */
                goto done;
        }

        /*
         * If extra VIs have been configured try reducing their count and see if
         * that works.
         */
        while (iaq->num_vis > 1) {
                iaq->num_vis--;
                update_nirq(iaq, nports);
                if (iaq->nirq <= navail &&
                    (itype != INTR_MSI || powerof2(iaq->nirq))) {
                        device_printf(sc->dev, "virtual interfaces per port "
                            "reduced to %d from %d.  nrxq=%u, nofldrxq=%u, "
                            "nrxq_vi=%u nofldrxq_vi=%u, nnmrxq_vi=%u.  "
                            "itype %d, navail %u, nirq %d.\n",
                            iaq->num_vis, t4_num_vis, iaq->nrxq, iaq->nofldrxq,
                            iaq->nrxq_vi, iaq->nofldrxq_vi, iaq->nnmrxq_vi,
                            itype, navail, iaq->nirq);
                        goto done;
                }
        }

        /*
         * Extra VIs will not be created.  Log a message if they were requested.
         */
        MPASS(iaq->num_vis == 1);
        iaq->ntxq_vi = iaq->nrxq_vi = 0;
        iaq->nofldtxq_vi = iaq->nofldrxq_vi = 0;
        iaq->nnmtxq_vi = iaq->nnmrxq_vi = 0;
        if (iaq->num_vis != t4_num_vis) {
                device_printf(sc->dev, "extra virtual interfaces disabled.  "
                    "nrxq=%u, nofldrxq=%u, nrxq_vi=%u nofldrxq_vi=%u, "
                    "nnmrxq_vi=%u.  itype %d, navail %u, nirq %d.\n",
                    iaq->nrxq, iaq->nofldrxq, iaq->nrxq_vi, iaq->nofldrxq_vi,
                    iaq->nnmrxq_vi, itype, navail, iaq->nirq);
        }

        /*
         * Keep reducing the number of NIC rx queues to the next lower power of
         * 2 (for even RSS distribution) and halving the TOE rx queues and see
         * if that works.
         */
        do {
                if (iaq->nrxq > 1) {
                        do {
                                iaq->nrxq--;
                        } while (!powerof2(iaq->nrxq));
                        if (iaq->nnmrxq > iaq->nrxq)
                                iaq->nnmrxq = iaq->nrxq;
                }
                if (iaq->nofldrxq > 1)
                        iaq->nofldrxq >>= 1;

                old_nirq = iaq->nirq;
                update_nirq(iaq, nports);
                if (iaq->nirq <= navail &&
                    (itype != INTR_MSI || powerof2(iaq->nirq))) {
                        device_printf(sc->dev, "running with reduced number of "
                            "rx queues because of shortage of interrupts.  "
                            "nrxq=%u, nofldrxq=%u.  "
                            "itype %d, navail %u, nirq %d.\n", iaq->nrxq,
                            iaq->nofldrxq, itype, navail, iaq->nirq);
                        goto done;
                }
        } while (old_nirq != iaq->nirq);

        /* One interrupt for everything.  Ugh. */
        device_printf(sc->dev, "running with minimal number of queues.  "
            "itype %d, navail %u.\n", itype, navail);
        iaq->nirq = 1;
        iaq->nrxq = 1;
        iaq->ntxq = 1;
        if (iaq->nofldrxq > 0) {
                iaq->nofldrxq = 1;
                iaq->nofldtxq = 1;
        }
        iaq->nnmtxq = 0;
        iaq->nnmrxq = 0;
done:
        MPASS(iaq->num_vis > 0);
        if (iaq->num_vis > 1) {
                MPASS(iaq->nrxq_vi > 0);
                MPASS(iaq->ntxq_vi > 0);
        }
        MPASS(iaq->nirq > 0);
        MPASS(iaq->nrxq > 0);
        MPASS(iaq->ntxq > 0);
        if (itype == INTR_MSI) {
                MPASS(powerof2(iaq->nirq));
        }
}

static int
cfg_itype_and_nqueues(struct adapter *sc, struct intrs_and_queues *iaq)
{
        int rc, itype, navail, nalloc;

        for (itype = INTR_MSIX; itype; itype >>= 1) {

                if ((itype & t4_intr_types) == 0)
                        continue;       /* not allowed */

                if (itype == INTR_MSIX)
                        navail = pci_msix_count(sc->dev);
                else if (itype == INTR_MSI)
                        navail = pci_msi_count(sc->dev);
                else
                        navail = 1;
restart:
                if (navail == 0)
                        continue;

                calculate_iaq(sc, iaq, itype, navail);
                nalloc = iaq->nirq;
                rc = 0;
                if (itype == INTR_MSIX)
                        rc = pci_alloc_msix(sc->dev, &nalloc);
                else if (itype == INTR_MSI)
                        rc = pci_alloc_msi(sc->dev, &nalloc);

                if (rc == 0 && nalloc > 0) {
                        if (nalloc == iaq->nirq)
                                return (0);

                        /*
                         * Didn't get the number requested.  Use whatever number
                         * the kernel is willing to allocate.
                         */
                        device_printf(sc->dev, "fewer vectors than requested, "
                            "type=%d, req=%d, rcvd=%d; will downshift req.\n",
                            itype, iaq->nirq, nalloc);
                        pci_release_msi(sc->dev);
                        navail = nalloc;
                        goto restart;
                }

                device_printf(sc->dev,
                    "failed to allocate vectors:%d, type=%d, req=%d, rcvd=%d\n",
                    itype, rc, iaq->nirq, nalloc);
        }

        device_printf(sc->dev,
            "failed to find a usable interrupt type.  "
            "allowed=%d, msi-x=%d, msi=%d, intx=1", t4_intr_types,
            pci_msix_count(sc->dev), pci_msi_count(sc->dev));

        return (ENXIO);
}

#define FW_VERSION(chip) ( \
    V_FW_HDR_FW_VER_MAJOR(chip##FW_VERSION_MAJOR) | \
    V_FW_HDR_FW_VER_MINOR(chip##FW_VERSION_MINOR) | \
    V_FW_HDR_FW_VER_MICRO(chip##FW_VERSION_MICRO) | \
    V_FW_HDR_FW_VER_BUILD(chip##FW_VERSION_BUILD))
#define FW_INTFVER(chip, intf) (chip##FW_HDR_INTFVER_##intf)

/* Just enough of fw_hdr to cover all version info. */
struct fw_h {
        __u8    ver;
        __u8    chip;
        __be16  len512;
        __be32  fw_ver;
        __be32  tp_microcode_ver;
        __u8    intfver_nic;
        __u8    intfver_vnic;
        __u8    intfver_ofld;
        __u8    intfver_ri;
        __u8    intfver_iscsipdu;
        __u8    intfver_iscsi;
        __u8    intfver_fcoepdu;
        __u8    intfver_fcoe;
};
/* Spot check a couple of fields. */
CTASSERT(offsetof(struct fw_h, fw_ver) == offsetof(struct fw_hdr, fw_ver));
CTASSERT(offsetof(struct fw_h, intfver_nic) == offsetof(struct fw_hdr, intfver_nic));
CTASSERT(offsetof(struct fw_h, intfver_fcoe) == offsetof(struct fw_hdr, intfver_fcoe));

struct fw_info {
        uint8_t chip;
        char *kld_name;
        char *fw_mod_name;
        struct fw_h fw_h;
} fw_info[] = {
        {
                .chip = CHELSIO_T4,
                .kld_name = "t4fw_cfg",
                .fw_mod_name = "t4fw",
                .fw_h = {
                        .chip = FW_HDR_CHIP_T4,
                        .fw_ver = htobe32(FW_VERSION(T4)),
                        .intfver_nic = FW_INTFVER(T4, NIC),
                        .intfver_vnic = FW_INTFVER(T4, VNIC),
                        .intfver_ofld = FW_INTFVER(T4, OFLD),
                        .intfver_ri = FW_INTFVER(T4, RI),
                        .intfver_iscsipdu = FW_INTFVER(T4, ISCSIPDU),
                        .intfver_iscsi = FW_INTFVER(T4, ISCSI),
                        .intfver_fcoepdu = FW_INTFVER(T4, FCOEPDU),
                        .intfver_fcoe = FW_INTFVER(T4, FCOE),
                },
        }, {
                .chip = CHELSIO_T5,
                .kld_name = "t5fw_cfg",
                .fw_mod_name = "t5fw",
                .fw_h = {
                        .chip = FW_HDR_CHIP_T5,
                        .fw_ver = htobe32(FW_VERSION(T5)),
                        .intfver_nic = FW_INTFVER(T5, NIC),
                        .intfver_vnic = FW_INTFVER(T5, VNIC),
                        .intfver_ofld = FW_INTFVER(T5, OFLD),
                        .intfver_ri = FW_INTFVER(T5, RI),
                        .intfver_iscsipdu = FW_INTFVER(T5, ISCSIPDU),
                        .intfver_iscsi = FW_INTFVER(T5, ISCSI),
                        .intfver_fcoepdu = FW_INTFVER(T5, FCOEPDU),
                        .intfver_fcoe = FW_INTFVER(T5, FCOE),
                },
        }, {
                .chip = CHELSIO_T6,
                .kld_name = "t6fw_cfg",
                .fw_mod_name = "t6fw",
                .fw_h = {
                        .chip = FW_HDR_CHIP_T6,
                        .fw_ver = htobe32(FW_VERSION(T6)),
                        .intfver_nic = FW_INTFVER(T6, NIC),
                        .intfver_vnic = FW_INTFVER(T6, VNIC),
                        .intfver_ofld = FW_INTFVER(T6, OFLD),
                        .intfver_ri = FW_INTFVER(T6, RI),
                        .intfver_iscsipdu = FW_INTFVER(T6, ISCSIPDU),
                        .intfver_iscsi = FW_INTFVER(T6, ISCSI),
                        .intfver_fcoepdu = FW_INTFVER(T6, FCOEPDU),
                        .intfver_fcoe = FW_INTFVER(T6, FCOE),
                },
        }
};

static struct fw_info *
find_fw_info(int chip)
{
        int i;

        for (i = 0; i < nitems(fw_info); i++) {
                if (fw_info[i].chip == chip)
                        return (&fw_info[i]);
        }
        return (NULL);
}

/*
 * Is the given firmware API compatible with the one the driver was compiled
 * with?
 */
static int
fw_compatible(const struct fw_h *hdr1, const struct fw_h *hdr2)
{

        /* short circuit if it's the exact same firmware version */
        if (hdr1->chip == hdr2->chip && hdr1->fw_ver == hdr2->fw_ver)
                return (1);

        /*
         * XXX: Is this too conservative?  Perhaps I should limit this to the
         * features that are supported in the driver.
         */
#define SAME_INTF(x) (hdr1->intfver_##x == hdr2->intfver_##x)
        if (hdr1->chip == hdr2->chip && SAME_INTF(nic) && SAME_INTF(vnic) &&
            SAME_INTF(ofld) && SAME_INTF(ri) && SAME_INTF(iscsipdu) &&
            SAME_INTF(iscsi) && SAME_INTF(fcoepdu) && SAME_INTF(fcoe))
                return (1);
#undef SAME_INTF

        return (0);
}

static int
load_fw_module(struct adapter *sc, const struct firmware **dcfg,
    const struct firmware **fw)
{
        struct fw_info *fw_info;

        *dcfg = NULL;
        if (fw != NULL)
                *fw = NULL;

        fw_info = find_fw_info(chip_id(sc));
        if (fw_info == NULL) {
                device_printf(sc->dev,
                    "unable to look up firmware information for chip %d.\n",
                    chip_id(sc));
                return (EINVAL);
        }

        *dcfg = firmware_get(fw_info->kld_name);
        if (*dcfg != NULL) {
                if (fw != NULL)
                        *fw = firmware_get(fw_info->fw_mod_name);
                return (0);
        }

        return (ENOENT);
}

static void
unload_fw_module(struct adapter *sc, const struct firmware *dcfg,
    const struct firmware *fw)
{

        if (fw != NULL)
                firmware_put(fw, FIRMWARE_UNLOAD);
        if (dcfg != NULL)
                firmware_put(dcfg, FIRMWARE_UNLOAD);
}

/*
 * Return values:
 * 0 means no firmware install attempted.
 * ERESTART means a firmware install was attempted and was successful.
 * +ve errno means a firmware install was attempted but failed.
 */
static int
install_kld_firmware(struct adapter *sc, struct fw_h *card_fw,
    const struct fw_h *drv_fw, const char *reason, int *already)
{
        const struct firmware *cfg, *fw;
        const uint32_t c = be32toh(card_fw->fw_ver);
        uint32_t d, k;
        int rc, fw_install;
        struct fw_h bundled_fw;
        bool load_attempted;

        cfg = fw = NULL;
        load_attempted = false;
        fw_install = t4_fw_install < 0 ? -t4_fw_install : t4_fw_install;

        memcpy(&bundled_fw, drv_fw, sizeof(bundled_fw));
        if (t4_fw_install < 0) {
                rc = load_fw_module(sc, &cfg, &fw);
                if (rc != 0 || fw == NULL) {
                        device_printf(sc->dev,
                            "failed to load firmware module: %d. cfg %p, fw %p;"
                            " will use compiled-in firmware version for"
                            "hw.cxgbe.fw_install checks.\n",
                            rc, cfg, fw);
                } else {
                        memcpy(&bundled_fw, fw->data, sizeof(bundled_fw));
                }
                load_attempted = true;
        }
        d = be32toh(bundled_fw.fw_ver);

        if (reason != NULL)
                goto install;

        if ((sc->flags & FW_OK) == 0) {

                if (c == 0xffffffff) {
                        reason = "missing";
                        goto install;
                }

                rc = 0;
                goto done;
        }

        if (!fw_compatible(card_fw, &bundled_fw)) {
                reason = "incompatible or unusable";
                goto install;
        }

        if (d > c) {
                reason = "older than the version bundled with this driver";
                goto install;
        }

        if (fw_install == 2 && d != c) {
                reason = "different than the version bundled with this driver";
                goto install;
        }

        /* No reason to do anything to the firmware already on the card. */
        rc = 0;
        goto done;

install:
        rc = 0;
        if ((*already)++)
                goto done;

        if (fw_install == 0) {
                device_printf(sc->dev, "firmware on card (%u.%u.%u.%u) is %s, "
                    "but the driver is prohibited from installing a firmware "
                    "on the card.\n",
                    G_FW_HDR_FW_VER_MAJOR(c), G_FW_HDR_FW_VER_MINOR(c),
                    G_FW_HDR_FW_VER_MICRO(c), G_FW_HDR_FW_VER_BUILD(c), reason);

                goto done;
        }

        /*
         * We'll attempt to install a firmware.  Load the module first (if it
         * hasn't been loaded already).
         */
        if (!load_attempted) {
                rc = load_fw_module(sc, &cfg, &fw);
                if (rc != 0 || fw == NULL) {
                        device_printf(sc->dev,
                            "failed to load firmware module: %d. cfg %p, fw %p\n",
                            rc, cfg, fw);
                        /* carry on */
                }
        }
        if (fw == NULL) {
                device_printf(sc->dev, "firmware on card (%u.%u.%u.%u) is %s, "
                    "but the driver cannot take corrective action because it "
                    "is unable to load the firmware module.\n",
                    G_FW_HDR_FW_VER_MAJOR(c), G_FW_HDR_FW_VER_MINOR(c),
                    G_FW_HDR_FW_VER_MICRO(c), G_FW_HDR_FW_VER_BUILD(c), reason);
                rc = sc->flags & FW_OK ? 0 : ENOENT;
                goto done;
        }
        k = be32toh(((const struct fw_hdr *)fw->data)->fw_ver);
        if (k != d) {
                MPASS(t4_fw_install > 0);
                device_printf(sc->dev,
                    "firmware in KLD (%u.%u.%u.%u) is not what the driver was "
                    "expecting (%u.%u.%u.%u) and will not be used.\n",
                    G_FW_HDR_FW_VER_MAJOR(k), G_FW_HDR_FW_VER_MINOR(k),
                    G_FW_HDR_FW_VER_MICRO(k), G_FW_HDR_FW_VER_BUILD(k),
                    G_FW_HDR_FW_VER_MAJOR(d), G_FW_HDR_FW_VER_MINOR(d),
                    G_FW_HDR_FW_VER_MICRO(d), G_FW_HDR_FW_VER_BUILD(d));
                rc = sc->flags & FW_OK ? 0 : EINVAL;
                goto done;
        }

        device_printf(sc->dev, "firmware on card (%u.%u.%u.%u) is %s, "
            "installing firmware %u.%u.%u.%u on card.\n",
            G_FW_HDR_FW_VER_MAJOR(c), G_FW_HDR_FW_VER_MINOR(c),
            G_FW_HDR_FW_VER_MICRO(c), G_FW_HDR_FW_VER_BUILD(c), reason,
            G_FW_HDR_FW_VER_MAJOR(d), G_FW_HDR_FW_VER_MINOR(d),
            G_FW_HDR_FW_VER_MICRO(d), G_FW_HDR_FW_VER_BUILD(d));

        rc = -t4_fw_upgrade(sc, sc->mbox, fw->data, fw->datasize, 0);
        if (rc != 0) {
                device_printf(sc->dev, "failed to install firmware: %d\n", rc);
        } else {
                /* Installed successfully, update the cached header too. */
                rc = ERESTART;
                memcpy(card_fw, fw->data, sizeof(*card_fw));
        }
done:
        unload_fw_module(sc, cfg, fw);

        return (rc);
}

/*
 * Establish contact with the firmware and attempt to become the master driver.
 *
 * A firmware will be installed to the card if needed (if the driver is allowed
 * to do so).
 */
static int
contact_firmware(struct adapter *sc)
{
        int rc, already = 0;
        enum dev_state state;
        struct fw_info *fw_info;
        struct fw_hdr *card_fw;         /* fw on the card */
        const struct fw_h *drv_fw;

        fw_info = find_fw_info(chip_id(sc));
        if (fw_info == NULL) {
                device_printf(sc->dev,
                    "unable to look up firmware information for chip %d.\n",
                    chip_id(sc));
                return (EINVAL);
        }
        drv_fw = &fw_info->fw_h;

        /* Read the header of the firmware on the card */
        card_fw = malloc(sizeof(*card_fw), M_CXGBE, M_ZERO | M_WAITOK);
restart:
        rc = -t4_get_fw_hdr(sc, card_fw);
        if (rc != 0) {
                device_printf(sc->dev,
                    "unable to read firmware header from card's flash: %d\n",
                    rc);
                goto done;
        }

        rc = install_kld_firmware(sc, (struct fw_h *)card_fw, drv_fw, NULL,
            &already);
        if (rc == ERESTART)
                goto restart;
        if (rc != 0)
                goto done;

        rc = t4_fw_hello(sc, sc->mbox, sc->mbox, MASTER_MAY, &state);
        if (rc < 0 || state == DEV_STATE_ERR) {
                rc = -rc;
                device_printf(sc->dev,
                    "failed to connect to the firmware: %d, %d.  "
                    "PCIE_FW 0x%08x\n", rc, state, t4_read_reg(sc, A_PCIE_FW));
#if 0
                if (install_kld_firmware(sc, (struct fw_h *)card_fw, drv_fw,
                    "not responding properly to HELLO", &already) == ERESTART)
                        goto restart;
#endif
                goto done;
        }
        MPASS(be32toh(card_fw->flags) & FW_HDR_FLAGS_RESET_HALT);
        sc->flags |= FW_OK;     /* The firmware responded to the FW_HELLO. */

        if (rc == sc->pf) {
                sc->flags |= MASTER_PF;
                rc = install_kld_firmware(sc, (struct fw_h *)card_fw, drv_fw,
                    NULL, &already);
                if (rc == ERESTART)
                        rc = 0;
                else if (rc != 0)
                        goto done;
        } else if (state == DEV_STATE_UNINIT) {
                /*
                 * We didn't get to be the master so we definitely won't be
                 * configuring the chip.  It's a bug if someone else hasn't
                 * configured it already.
                 */
                device_printf(sc->dev, "couldn't be master(%d), "
                    "device not already initialized either(%d).  "
                    "PCIE_FW 0x%08x\n", rc, state, t4_read_reg(sc, A_PCIE_FW));
                rc = EPROTO;
                goto done;
        } else {
                /*
                 * Some other PF is the master and has configured the chip.
                 * This is allowed but untested.
                 */
                device_printf(sc->dev, "PF%d is master, device state %d.  "
                    "PCIE_FW 0x%08x\n", rc, state, t4_read_reg(sc, A_PCIE_FW));
                snprintf(sc->cfg_file, sizeof(sc->cfg_file), "pf%d", rc);
                sc->cfcsum = 0;
                rc = 0;
        }
done:
        if (rc != 0 && sc->flags & FW_OK) {
                t4_fw_bye(sc, sc->mbox);
                sc->flags &= ~FW_OK;
        }
        free(card_fw, M_CXGBE);
        return (rc);
}

static int
copy_cfg_file_to_card(struct adapter *sc, char *cfg_file,
    uint32_t mtype, uint32_t moff)
{
        struct fw_info *fw_info;
        const struct firmware *dcfg, *rcfg = NULL;
        const uint32_t *cfdata;
        uint32_t cflen, addr;
        int rc;

        load_fw_module(sc, &dcfg, NULL);

        /* Card specific interpretation of "default". */
        if (strncmp(cfg_file, DEFAULT_CF, sizeof(t4_cfg_file)) == 0) {
                if (pci_get_device(sc->dev) == 0x440a)
                        snprintf(cfg_file, sizeof(t4_cfg_file), UWIRE_CF);
                if (is_fpga(sc))
                        snprintf(cfg_file, sizeof(t4_cfg_file), FPGA_CF);
        }

        if (strncmp(cfg_file, DEFAULT_CF, sizeof(t4_cfg_file)) == 0) {
                if (dcfg == NULL) {
                        device_printf(sc->dev,
                            "KLD with default config is not available.\n");
                        rc = ENOENT;
                        goto done;
                }
                cfdata = dcfg->data;
                cflen = dcfg->datasize & ~3;
        } else {
                char s[32];

                fw_info = find_fw_info(chip_id(sc));
                if (fw_info == NULL) {
                        device_printf(sc->dev,
                            "unable to look up firmware information for chip %d.\n",
                            chip_id(sc));
                        rc = EINVAL;
                        goto done;
                }
                snprintf(s, sizeof(s), "%s_%s", fw_info->kld_name, cfg_file);

                rcfg = firmware_get(s);
                if (rcfg == NULL) {
                        device_printf(sc->dev,
                            "unable to load module \"%s\" for configuration "
                            "profile \"%s\".\n", s, cfg_file);
                        rc = ENOENT;
                        goto done;
                }
                cfdata = rcfg->data;
                cflen = rcfg->datasize & ~3;
        }

        if (cflen > FLASH_CFG_MAX_SIZE) {
                device_printf(sc->dev,
                    "config file too long (%d, max allowed is %d).\n",
                    cflen, FLASH_CFG_MAX_SIZE);
                rc = EINVAL;
                goto done;
        }

        rc = validate_mt_off_len(sc, mtype, moff, cflen, &addr);
        if (rc != 0) {
                device_printf(sc->dev,
                    "%s: addr (%d/0x%x) or len %d is not valid: %d.\n",
                    __func__, mtype, moff, cflen, rc);
                rc = EINVAL;
                goto done;
        }
        write_via_memwin(sc, 2, addr, cfdata, cflen);
done:
        if (rcfg != NULL)
                firmware_put(rcfg, FIRMWARE_UNLOAD);
        unload_fw_module(sc, dcfg, NULL);
        return (rc);
}

struct caps_allowed {
        uint16_t nbmcaps;
        uint16_t linkcaps;
        uint16_t switchcaps;
        uint16_t niccaps;
        uint16_t toecaps;
        uint16_t rdmacaps;
        uint16_t cryptocaps;
        uint16_t iscsicaps;
        uint16_t fcoecaps;
};

#define FW_PARAM_DEV(param) \
        (V_FW_PARAMS_MNEM(FW_PARAMS_MNEM_DEV) | \
         V_FW_PARAMS_PARAM_X(FW_PARAMS_PARAM_DEV_##param))
#define FW_PARAM_PFVF(param) \
        (V_FW_PARAMS_MNEM(FW_PARAMS_MNEM_PFVF) | \
         V_FW_PARAMS_PARAM_X(FW_PARAMS_PARAM_PFVF_##param))

/*
 * Provide a configuration profile to the firmware and have it initialize the
 * chip accordingly.  This may involve uploading a configuration file to the
 * card.
 */
static int
apply_cfg_and_initialize(struct adapter *sc, char *cfg_file,
    const struct caps_allowed *caps_allowed)
{
        int rc;
        struct fw_caps_config_cmd caps;
        uint32_t mtype, moff, finicsum, cfcsum, param, val;

        rc = -t4_fw_reset(sc, sc->mbox, F_PIORSTMODE | F_PIORST);
        if (rc != 0) {
                device_printf(sc->dev, "firmware reset failed: %d.\n", rc);
                return (rc);
        }

        bzero(&caps, sizeof(caps));
        caps.op_to_write = htobe32(V_FW_CMD_OP(FW_CAPS_CONFIG_CMD) |
            F_FW_CMD_REQUEST | F_FW_CMD_READ);
        if (strncmp(cfg_file, BUILTIN_CF, sizeof(t4_cfg_file)) == 0) {
                mtype = 0;
                moff = 0;
                caps.cfvalid_to_len16 = htobe32(FW_LEN16(caps));
        } else if (strncmp(cfg_file, FLASH_CF, sizeof(t4_cfg_file)) == 0) {
                mtype = FW_MEMTYPE_FLASH;
                moff = t4_flash_cfg_addr(sc);
                caps.cfvalid_to_len16 = htobe32(F_FW_CAPS_CONFIG_CMD_CFVALID |
                    V_FW_CAPS_CONFIG_CMD_MEMTYPE_CF(mtype) |
                    V_FW_CAPS_CONFIG_CMD_MEMADDR64K_CF(moff >> 16) |
                    FW_LEN16(caps));
        } else {
                /*
                 * Ask the firmware where it wants us to upload the config file.
                 */
                param = FW_PARAM_DEV(CF);
                rc = -t4_query_params(sc, sc->mbox, sc->pf, 0, 1, &param, &val);
                if (rc != 0) {
                        /* No support for config file?  Shouldn't happen. */
                        device_printf(sc->dev,
                            "failed to query config file location: %d.\n", rc);
                        goto done;
                }
                mtype = G_FW_PARAMS_PARAM_Y(val);
                moff = G_FW_PARAMS_PARAM_Z(val) << 16;
                caps.cfvalid_to_len16 = htobe32(F_FW_CAPS_CONFIG_CMD_CFVALID |
                    V_FW_CAPS_CONFIG_CMD_MEMTYPE_CF(mtype) |
                    V_FW_CAPS_CONFIG_CMD_MEMADDR64K_CF(moff >> 16) |
                    FW_LEN16(caps));

                rc = copy_cfg_file_to_card(sc, cfg_file, mtype, moff);
                if (rc != 0) {
                        device_printf(sc->dev,
                            "failed to upload config file to card: %d.\n", rc);
                        goto done;
                }
        }
        rc = -t4_wr_mbox(sc, sc->mbox, &caps, sizeof(caps), &caps);
        if (rc != 0) {
                device_printf(sc->dev, "failed to pre-process config file: %d "
                    "(mtype %d, moff 0x%x).\n", rc, mtype, moff);
                goto done;
        }

        finicsum = be32toh(caps.finicsum);
        cfcsum = be32toh(caps.cfcsum);  /* actual */
        if (finicsum != cfcsum) {
                device_printf(sc->dev,
                    "WARNING: config file checksum mismatch: %08x %08x\n",
                    finicsum, cfcsum);
        }
        sc->cfcsum = cfcsum;
        snprintf(sc->cfg_file, sizeof(sc->cfg_file), "%s", cfg_file);

        /*
         * Let the firmware know what features will (not) be used so it can tune
         * things accordingly.
         */
#define LIMIT_CAPS(x) do { \
        caps.x##caps &= htobe16(caps_allowed->x##caps); \
} while (0)
        LIMIT_CAPS(nbm);
        LIMIT_CAPS(link);
        LIMIT_CAPS(switch);
        LIMIT_CAPS(nic);
        LIMIT_CAPS(toe);
        LIMIT_CAPS(rdma);
        LIMIT_CAPS(crypto);
        LIMIT_CAPS(iscsi);
        LIMIT_CAPS(fcoe);
#undef LIMIT_CAPS
        if (caps.niccaps & htobe16(FW_CAPS_CONFIG_NIC_HASHFILTER)) {
                /*
                 * TOE and hashfilters are mutually exclusive.  It is a config
                 * file or firmware bug if both are reported as available.  Try
                 * to cope with the situation in non-debug builds by disabling
                 * TOE.
                 */
                MPASS(caps.toecaps == 0);

                caps.toecaps = 0;
                caps.rdmacaps = 0;
                caps.iscsicaps = 0;
        }

        caps.op_to_write = htobe32(V_FW_CMD_OP(FW_CAPS_CONFIG_CMD) |
            F_FW_CMD_REQUEST | F_FW_CMD_WRITE);
        caps.cfvalid_to_len16 = htobe32(FW_LEN16(caps));
        rc = -t4_wr_mbox(sc, sc->mbox, &caps, sizeof(caps), NULL);
        if (rc != 0) {
                device_printf(sc->dev,
                    "failed to process config file: %d.\n", rc);
                goto done;
        }

        t4_tweak_chip_settings(sc);
        set_params__pre_init(sc);

        /* get basic stuff going */
        rc = -t4_fw_initialize(sc, sc->mbox);
        if (rc != 0) {
                device_printf(sc->dev, "fw_initialize failed: %d.\n", rc);
                goto done;
        }
done:
        return (rc);
}

/*
 * Partition chip resources for use between various PFs, VFs, etc.
 */
static int
partition_resources(struct adapter *sc)
{
        char cfg_file[sizeof(t4_cfg_file)];
        struct caps_allowed caps_allowed;
        int rc;
        bool fallback;

        /* Only the master driver gets to configure the chip resources. */
        MPASS(sc->flags & MASTER_PF);

#define COPY_CAPS(x) do { \
        caps_allowed.x##caps = t4_##x##caps_allowed; \
} while (0)
        bzero(&caps_allowed, sizeof(caps_allowed));
        COPY_CAPS(nbm);
        COPY_CAPS(link);
        COPY_CAPS(switch);
        COPY_CAPS(nic);
        COPY_CAPS(toe);
        COPY_CAPS(rdma);
        COPY_CAPS(crypto);
        COPY_CAPS(iscsi);
        COPY_CAPS(fcoe);
        fallback = sc->debug_flags & DF_DISABLE_CFG_RETRY ? false : true;
        snprintf(cfg_file, sizeof(cfg_file), "%s", t4_cfg_file);
retry:
        rc = apply_cfg_and_initialize(sc, cfg_file, &caps_allowed);
        if (rc != 0 && fallback) {
                device_printf(sc->dev,
                    "failed (%d) to configure card with \"%s\" profile, "
                    "will fall back to a basic configuration and retry.\n",
                    rc, cfg_file);
                snprintf(cfg_file, sizeof(cfg_file), "%s", BUILTIN_CF);
                bzero(&caps_allowed, sizeof(caps_allowed));
                COPY_CAPS(switch);
                caps_allowed.niccaps = FW_CAPS_CONFIG_NIC;
                fallback = false;
                goto retry;
        }
#undef COPY_CAPS
        return (rc);
}

/*
 * Retrieve parameters that are needed (or nice to have) very early.
 */
static int
get_params__pre_init(struct adapter *sc)
{
        int rc;
        uint32_t param[2], val[2];

        t4_get_version_info(sc);

        snprintf(sc->fw_version, sizeof(sc->fw_version), "%u.%u.%u.%u",
            G_FW_HDR_FW_VER_MAJOR(sc->params.fw_vers),
            G_FW_HDR_FW_VER_MINOR(sc->params.fw_vers),
            G_FW_HDR_FW_VER_MICRO(sc->params.fw_vers),
            G_FW_HDR_FW_VER_BUILD(sc->params.fw_vers));

        snprintf(sc->bs_version, sizeof(sc->bs_version), "%u.%u.%u.%u",
            G_FW_HDR_FW_VER_MAJOR(sc->params.bs_vers),
            G_FW_HDR_FW_VER_MINOR(sc->params.bs_vers),
            G_FW_HDR_FW_VER_MICRO(sc->params.bs_vers),
            G_FW_HDR_FW_VER_BUILD(sc->params.bs_vers));

        snprintf(sc->tp_version, sizeof(sc->tp_version), "%u.%u.%u.%u",
            G_FW_HDR_FW_VER_MAJOR(sc->params.tp_vers),
            G_FW_HDR_FW_VER_MINOR(sc->params.tp_vers),
            G_FW_HDR_FW_VER_MICRO(sc->params.tp_vers),
            G_FW_HDR_FW_VER_BUILD(sc->params.tp_vers));

        snprintf(sc->er_version, sizeof(sc->er_version), "%u.%u.%u.%u",
            G_FW_HDR_FW_VER_MAJOR(sc->params.er_vers),
            G_FW_HDR_FW_VER_MINOR(sc->params.er_vers),
            G_FW_HDR_FW_VER_MICRO(sc->params.er_vers),
            G_FW_HDR_FW_VER_BUILD(sc->params.er_vers));

        param[0] = FW_PARAM_DEV(PORTVEC);
        param[1] = FW_PARAM_DEV(CCLK);
        rc = -t4_query_params(sc, sc->mbox, sc->pf, 0, 2, param, val);
        if (rc != 0) {
                device_printf(sc->dev,
                    "failed to query parameters (pre_init): %d.\n", rc);
                return (rc);
        }

        sc->params.portvec = val[0];
        sc->params.nports = bitcount32(val[0]);
        sc->params.vpd.cclk = val[1];

        /* Read device log parameters. */
        rc = -t4_init_devlog_params(sc, 1);
        if (rc == 0)
                fixup_devlog_params(sc);
        else {
                device_printf(sc->dev,
                    "failed to get devlog parameters: %d.\n", rc);
                rc = 0; /* devlog isn't critical for device operation */
        }

        return (rc);
}

/*
 * Any params that need to be set before FW_INITIALIZE.
 */
static int
set_params__pre_init(struct adapter *sc)
{
        int rc = 0;
        uint32_t param, val;

        if (chip_id(sc) >= CHELSIO_T6) {
                param = FW_PARAM_DEV(HPFILTER_REGION_SUPPORT);
                val = 1;
                rc = -t4_set_params(sc, sc->mbox, sc->pf, 0, 1, &param, &val);
                /* firmwares < 1.20.1.0 do not have this param. */
                if (rc == FW_EINVAL &&
                    sc->params.fw_vers < FW_VERSION32(1, 20, 1, 0)) {
                        rc = 0;
                }
                if (rc != 0) {
                        device_printf(sc->dev,
                            "failed to enable high priority filters :%d.\n",
                            rc);
                }
        }

        /* Enable opaque VIIDs with firmwares that support it. */
        param = FW_PARAM_DEV(OPAQUE_VIID_SMT_EXTN);
        val = 1;
        rc = -t4_set_params(sc, sc->mbox, sc->pf, 0, 1, &param, &val);
        if (rc == 0 && val == 1)
                sc->params.viid_smt_extn_support = true;
        else
                sc->params.viid_smt_extn_support = false;

        return (rc);
}

/*
 * Retrieve various parameters that are of interest to the driver.  The device
 * has been initialized by the firmware at this point.
 */
static int
get_params__post_init(struct adapter *sc)
{
        int rc;
        uint32_t param[7], val[7];
        struct fw_caps_config_cmd caps;

        param[0] = FW_PARAM_PFVF(IQFLINT_START);
        param[1] = FW_PARAM_PFVF(EQ_START);
        param[2] = FW_PARAM_PFVF(FILTER_START);
        param[3] = FW_PARAM_PFVF(FILTER_END);
        param[4] = FW_PARAM_PFVF(L2T_START);
        param[5] = FW_PARAM_PFVF(L2T_END);
        param[6] = V_FW_PARAMS_MNEM(FW_PARAMS_MNEM_DEV) |
            V_FW_PARAMS_PARAM_X(FW_PARAMS_PARAM_DEV_DIAG) |
            V_FW_PARAMS_PARAM_Y(FW_PARAM_DEV_DIAG_VDD);
        rc = -t4_query_params(sc, sc->mbox, sc->pf, 0, 7, param, val);
        if (rc != 0) {
                device_printf(sc->dev,
                    "failed to query parameters (post_init): %d.\n", rc);
                return (rc);
        }

        sc->sge.iq_start = val[0];
        sc->sge.eq_start = val[1];
        if ((int)val[3] > (int)val[2]) {
                sc->tids.ftid_base = val[2];
                sc->tids.ftid_end = val[3];
                sc->tids.nftids = val[3] - val[2] + 1;
        }
        sc->vres.l2t.start = val[4];
        sc->vres.l2t.size = val[5] - val[4] + 1;
        KASSERT(sc->vres.l2t.size <= L2T_SIZE,
            ("%s: L2 table size (%u) larger than expected (%u)",
            __func__, sc->vres.l2t.size, L2T_SIZE));
        sc->params.core_vdd = val[6];

        param[0] = FW_PARAM_PFVF(IQFLINT_END);
        param[1] = FW_PARAM_PFVF(EQ_END);
        rc = -t4_query_params(sc, sc->mbox, sc->pf, 0, 2, param, val);
        if (rc != 0) {
                device_printf(sc->dev,
                    "failed to query parameters (post_init2): %d.\n", rc);
                return (rc);
        }
        MPASS((int)val[0] >= sc->sge.iq_start);
        sc->sge.iqmap_sz = val[0] - sc->sge.iq_start + 1;
        MPASS((int)val[1] >= sc->sge.eq_start);
        sc->sge.eqmap_sz = val[1] - sc->sge.eq_start + 1;

        if (chip_id(sc) >= CHELSIO_T6) {

                sc->tids.tid_base = t4_read_reg(sc,
                    A_LE_DB_ACTIVE_TABLE_START_INDEX);

                param[0] = FW_PARAM_PFVF(HPFILTER_START);
                param[1] = FW_PARAM_PFVF(HPFILTER_END);
                rc = -t4_query_params(sc, sc->mbox, sc->pf, 0, 2, param, val);
                if (rc != 0) {
                        device_printf(sc->dev,
                           "failed to query hpfilter parameters: %d.\n", rc);
                        return (rc);
                }
                if ((int)val[1] > (int)val[0]) {
                        sc->tids.hpftid_base = val[0];
                        sc->tids.hpftid_end = val[1];
                        sc->tids.nhpftids = val[1] - val[0] + 1;

                        /*
                         * These should go off if the layout changes and the
                         * driver needs to catch up.
                         */
                        MPASS(sc->tids.hpftid_base == 0);
                        MPASS(sc->tids.tid_base == sc->tids.nhpftids);
                }

                param[0] = FW_PARAM_PFVF(RAWF_START);
                param[1] = FW_PARAM_PFVF(RAWF_END);
                rc = -t4_query_params(sc, sc->mbox, sc->pf, 0, 2, param, val);
                if (rc != 0) {
                        device_printf(sc->dev,
                           "failed to query rawf parameters: %d.\n", rc);
                        return (rc);
                }
                if ((int)val[1] > (int)val[0]) {
                        sc->rawf_base = val[0];
                        sc->nrawf = val[1] - val[0] + 1;
                }
        }

        /*
         * MPSBGMAP is queried separately because only recent firmwares support
         * it as a parameter and we don't want the compound query above to fail
         * on older firmwares.
         */
        param[0] = FW_PARAM_DEV(MPSBGMAP);
        val[0] = 0;
        rc = -t4_query_params(sc, sc->mbox, sc->pf, 0, 1, param, val);
        if (rc == 0)
                sc->params.mps_bg_map = val[0];
        else
                sc->params.mps_bg_map = 0;

        /*
         * Determine whether the firmware supports the filter2 work request.
         * This is queried separately for the same reason as MPSBGMAP above.
         */
        param[0] = FW_PARAM_DEV(FILTER2_WR);
        val[0] = 0;
        rc = -t4_query_params(sc, sc->mbox, sc->pf, 0, 1, param, val);
        if (rc == 0)
                sc->params.filter2_wr_support = val[0] != 0;
        else
                sc->params.filter2_wr_support = 0;

        /*
         * Find out whether we're allowed to use the ULPTX MEMWRITE DSGL.
         * This is queried separately for the same reason as other params above.
         */
        param[0] = FW_PARAM_DEV(ULPTX_MEMWRITE_DSGL);
        val[0] = 0;
        rc = -t4_query_params(sc, sc->mbox, sc->pf, 0, 1, param, val);
        if (rc == 0)
                sc->params.ulptx_memwrite_dsgl = val[0] != 0;
        else
                sc->params.ulptx_memwrite_dsgl = false;

        /* FW_RI_FR_NSMR_TPTE_WR support */
        param[0] = FW_PARAM_DEV(RI_FR_NSMR_TPTE_WR);
        rc = -t4_query_params(sc, sc->mbox, sc->pf, 0, 1, param, val);
        if (rc == 0)
                sc->params.fr_nsmr_tpte_wr_support = val[0] != 0;
        else
                sc->params.fr_nsmr_tpte_wr_support = false;

        /* Support for 512 SGL entries per FR MR. */
        param[0] = FW_PARAM_DEV(DEV_512SGL_MR);
        rc = -t4_query_params(sc, sc->mbox, sc->pf, 0, 1, param, val);
        if (rc == 0)
                sc->params.dev_512sgl_mr = val[0] != 0;
        else
                sc->params.dev_512sgl_mr = false;

        param[0] = FW_PARAM_PFVF(MAX_PKTS_PER_ETH_TX_PKTS_WR);
        rc = -t4_query_params(sc, sc->mbox, sc->pf, 0, 1, param, val);
        if (rc == 0)
                sc->params.max_pkts_per_eth_tx_pkts_wr = val[0];
        else
                sc->params.max_pkts_per_eth_tx_pkts_wr = 15;

        param[0] = FW_PARAM_DEV(NUM_TM_CLASS);
        rc = -t4_query_params(sc, sc->mbox, sc->pf, 0, 1, param, val);
        if (rc == 0) {
                MPASS(val[0] > 0 && val[0] < 256);      /* nsched_cls is 8b */
                sc->params.nsched_cls = val[0];
        } else
                sc->params.nsched_cls = sc->chip_params->nsched_cls;

        /* get capabilites */
        bzero(&caps, sizeof(caps));
        caps.op_to_write = htobe32(V_FW_CMD_OP(FW_CAPS_CONFIG_CMD) |
            F_FW_CMD_REQUEST | F_FW_CMD_READ);
        caps.cfvalid_to_len16 = htobe32(FW_LEN16(caps));
        rc = -t4_wr_mbox(sc, sc->mbox, &caps, sizeof(caps), &caps);
        if (rc != 0) {
                device_printf(sc->dev,
                    "failed to get card capabilities: %d.\n", rc);
                return (rc);
        }

#define READ_CAPS(x) do { \
        sc->x = htobe16(caps.x); \
} while (0)
        READ_CAPS(nbmcaps);
        READ_CAPS(linkcaps);
        READ_CAPS(switchcaps);
        READ_CAPS(niccaps);
        READ_CAPS(toecaps);
        READ_CAPS(rdmacaps);
        READ_CAPS(cryptocaps);
        READ_CAPS(iscsicaps);
        READ_CAPS(fcoecaps);

        if (sc->niccaps & FW_CAPS_CONFIG_NIC_HASHFILTER) {
                MPASS(chip_id(sc) > CHELSIO_T4);
                MPASS(sc->toecaps == 0);
                sc->toecaps = 0;

                param[0] = FW_PARAM_DEV(NTID);
                rc = -t4_query_params(sc, sc->mbox, sc->pf, 0, 1, param, val);
                if (rc != 0) {
                        device_printf(sc->dev,
                            "failed to query HASHFILTER parameters: %d.\n", rc);
                        return (rc);
                }
                sc->tids.ntids = val[0];
                if (sc->params.fw_vers < FW_VERSION32(1, 20, 5, 0)) {
                        MPASS(sc->tids.ntids >= sc->tids.nhpftids);
                        sc->tids.ntids -= sc->tids.nhpftids;
                }
                sc->tids.natids = min(sc->tids.ntids / 2, MAX_ATIDS);
                sc->params.hash_filter = 1;
        }
        if (sc->niccaps & FW_CAPS_CONFIG_NIC_ETHOFLD) {
                param[0] = FW_PARAM_PFVF(ETHOFLD_START);
                param[1] = FW_PARAM_PFVF(ETHOFLD_END);
                param[2] = FW_PARAM_DEV(FLOWC_BUFFIFO_SZ);
                rc = -t4_query_params(sc, sc->mbox, sc->pf, 0, 3, param, val);
                if (rc != 0) {
                        device_printf(sc->dev,
                            "failed to query NIC parameters: %d.\n", rc);
                        return (rc);
                }
                if ((int)val[1] > (int)val[0]) {
                        sc->tids.etid_base = val[0];
                        sc->tids.etid_end = val[1];
                        sc->tids.netids = val[1] - val[0] + 1;
                        sc->params.eo_wr_cred = val[2];
                        sc->params.ethoffload = 1;
                }
        }
        if (sc->toecaps) {
                /* query offload-related parameters */
                param[0] = FW_PARAM_DEV(NTID);
                param[1] = FW_PARAM_PFVF(SERVER_START);
                param[2] = FW_PARAM_PFVF(SERVER_END);
                param[3] = FW_PARAM_PFVF(TDDP_START);
                param[4] = FW_PARAM_PFVF(TDDP_END);
                param[5] = FW_PARAM_DEV(FLOWC_BUFFIFO_SZ);
                rc = -t4_query_params(sc, sc->mbox, sc->pf, 0, 6, param, val);
                if (rc != 0) {
                        device_printf(sc->dev,
                            "failed to query TOE parameters: %d.\n", rc);
                        return (rc);
                }
                sc->tids.ntids = val[0];
                if (sc->params.fw_vers < FW_VERSION32(1, 20, 5, 0)) {
                        MPASS(sc->tids.ntids >= sc->tids.nhpftids);
                        sc->tids.ntids -= sc->tids.nhpftids;
                }
                sc->tids.natids = min(sc->tids.ntids / 2, MAX_ATIDS);
                if ((int)val[2] > (int)val[1]) {
                        sc->tids.stid_base = val[1];
                        sc->tids.nstids = val[2] - val[1] + 1;
                }
                sc->vres.ddp.start = val[3];
                sc->vres.ddp.size = val[4] - val[3] + 1;
                sc->params.ofldq_wr_cred = val[5];
                sc->params.offload = 1;
        } else {
                /*
                 * The firmware attempts memfree TOE configuration for -SO cards
                 * and will report toecaps=0 if it runs out of resources (this
                 * depends on the config file).  It may not report 0 for other
                 * capabilities dependent on the TOE in this case.  Set them to
                 * 0 here so that the driver doesn't bother tracking resources
                 * that will never be used.
                 */
                sc->iscsicaps = 0;
                sc->rdmacaps = 0;
        }
        if (sc->rdmacaps) {
                param[0] = FW_PARAM_PFVF(STAG_START);
                param[1] = FW_PARAM_PFVF(STAG_END);
                param[2] = FW_PARAM_PFVF(RQ_START);
                param[3] = FW_PARAM_PFVF(RQ_END);
                param[4] = FW_PARAM_PFVF(PBL_START);
                param[5] = FW_PARAM_PFVF(PBL_END);
                rc = -t4_query_params(sc, sc->mbox, sc->pf, 0, 6, param, val);
                if (rc != 0) {
                        device_printf(sc->dev,
                            "failed to query RDMA parameters(1): %d.\n", rc);
                        return (rc);
                }
                sc->vres.stag.start = val[0];
                sc->vres.stag.size = val[1] - val[0] + 1;
                sc->vres.rq.start = val[2];
                sc->vres.rq.size = val[3] - val[2] + 1;
                sc->vres.pbl.start = val[4];
                sc->vres.pbl.size = val[5] - val[4] + 1;

                param[0] = FW_PARAM_PFVF(SQRQ_START);
                param[1] = FW_PARAM_PFVF(SQRQ_END);
                param[2] = FW_PARAM_PFVF(CQ_START);
                param[3] = FW_PARAM_PFVF(CQ_END);
                param[4] = FW_PARAM_PFVF(OCQ_START);
                param[5] = FW_PARAM_PFVF(OCQ_END);
                rc = -t4_query_params(sc, sc->mbox, sc->pf, 0, 6, param, val);
                if (rc != 0) {
                        device_printf(sc->dev,
                            "failed to query RDMA parameters(2): %d.\n", rc);
                        return (rc);
                }
                sc->vres.qp.start = val[0];
                sc->vres.qp.size = val[1] - val[0] + 1;
                sc->vres.cq.start = val[2];
                sc->vres.cq.size = val[3] - val[2] + 1;
                sc->vres.ocq.start = val[4];
                sc->vres.ocq.size = val[5] - val[4] + 1;

                param[0] = FW_PARAM_PFVF(SRQ_START);
                param[1] = FW_PARAM_PFVF(SRQ_END);
                param[2] = FW_PARAM_DEV(MAXORDIRD_QP);
                param[3] = FW_PARAM_DEV(MAXIRD_ADAPTER);
                rc = -t4_query_params(sc, sc->mbox, sc->pf, 0, 4, param, val);
                if (rc != 0) {
                        device_printf(sc->dev,
                            "failed to query RDMA parameters(3): %d.\n", rc);
                        return (rc);
                }
                sc->vres.srq.start = val[0];
                sc->vres.srq.size = val[1] - val[0] + 1;
                sc->params.max_ordird_qp = val[2];
                sc->params.max_ird_adapter = val[3];
        }
        if (sc->iscsicaps) {
                param[0] = FW_PARAM_PFVF(ISCSI_START);
                param[1] = FW_PARAM_PFVF(ISCSI_END);
                rc = -t4_query_params(sc, sc->mbox, sc->pf, 0, 2, param, val);
                if (rc != 0) {
                        device_printf(sc->dev,
                            "failed to query iSCSI parameters: %d.\n", rc);
                        return (rc);
                }
                sc->vres.iscsi.start = val[0];
                sc->vres.iscsi.size = val[1] - val[0] + 1;
        }
        if (sc->cryptocaps & FW_CAPS_CONFIG_TLSKEYS) {
                param[0] = FW_PARAM_PFVF(TLS_START);
                param[1] = FW_PARAM_PFVF(TLS_END);
                rc = -t4_query_params(sc, sc->mbox, sc->pf, 0, 2, param, val);
                if (rc != 0) {
                        device_printf(sc->dev,
                            "failed to query TLS parameters: %d.\n", rc);
                        return (rc);
                }
                sc->vres.key.start = val[0];
                sc->vres.key.size = val[1] - val[0] + 1;
        }

        /*
         * We've got the params we wanted to query directly from the firmware.
         * Grab some others via other means.
         */
        t4_init_sge_params(sc);
        t4_init_tp_params(sc);
        t4_read_mtu_tbl(sc, sc->params.mtus, NULL);
        t4_load_mtus(sc, sc->params.mtus, sc->params.a_wnd, sc->params.b_wnd);

        rc = t4_verify_chip_settings(sc);
        if (rc != 0)
                return (rc);
        t4_init_rx_buf_info(sc);

        return (rc);
}

#ifdef KERN_TLS
static void
ktls_tick(void *arg)
{
        struct adapter *sc;
        uint32_t tstamp;

        sc = arg;
        tstamp = tcp_ts_getticks();
        t4_write_reg(sc, A_TP_SYNC_TIME_HI, tstamp >> 1);
        t4_write_reg(sc, A_TP_SYNC_TIME_LO, tstamp << 31);
        callout_schedule_sbt(&sc->ktls_tick, SBT_1MS, 0, C_HARDCLOCK);
}

static int
t4_config_kern_tls(struct adapter *sc, bool enable)
{
        int rc;
        uint32_t param = V_FW_PARAMS_MNEM(FW_PARAMS_MNEM_DEV) |
            V_FW_PARAMS_PARAM_X(FW_PARAMS_PARAM_DEV_KTLS_HW) |
            V_FW_PARAMS_PARAM_Y(enable ? 1 : 0) |
            V_FW_PARAMS_PARAM_Z(FW_PARAMS_PARAM_DEV_KTLS_HW_USER_ENABLE);

        rc = -t4_set_params(sc, sc->mbox, sc->pf, 0, 1, &param, &param);
        if (rc != 0) {
                CH_ERR(sc, "failed to %s NIC TLS: %d\n",
                    enable ?  "enable" : "disable", rc);
                return (rc);
        }

        if (enable) {
                sc->flags |= KERN_TLS_ON;
                callout_reset_sbt(&sc->ktls_tick, SBT_1MS, 0, ktls_tick, sc,
                    C_HARDCLOCK);
        } else {
                sc->flags &= ~KERN_TLS_ON;
                callout_stop(&sc->ktls_tick);
        }

        return (rc);
}
#endif

static int
set_params__post_init(struct adapter *sc)
{
        uint32_t mask, param, val;
#ifdef TCP_OFFLOAD
        int i, v, shift;
#endif

        /* ask for encapsulated CPLs */
        param = FW_PARAM_PFVF(CPLFW4MSG_ENCAP);
        val = 1;
        (void)t4_set_params(sc, sc->mbox, sc->pf, 0, 1, &param, &val);

        /* Enable 32b port caps if the firmware supports it. */
        param = FW_PARAM_PFVF(PORT_CAPS32);
        val = 1;
        if (t4_set_params(sc, sc->mbox, sc->pf, 0, 1, &param, &val) == 0)
                sc->params.port_caps32 = 1;

        /* Let filter + maskhash steer to a part of the VI's RSS region. */
        val = 1 << (G_MASKSIZE(t4_read_reg(sc, A_TP_RSS_CONFIG_TNL)) - 1);
        t4_set_reg_field(sc, A_TP_RSS_CONFIG_TNL, V_MASKFILTER(M_MASKFILTER),
            V_MASKFILTER(val - 1));

        mask = F_DROPERRORANY | F_DROPERRORMAC | F_DROPERRORIPVER |
            F_DROPERRORFRAG | F_DROPERRORATTACK | F_DROPERRORETHHDRLEN |
            F_DROPERRORIPHDRLEN | F_DROPERRORTCPHDRLEN | F_DROPERRORPKTLEN |
            F_DROPERRORTCPOPT | F_DROPERRORCSUMIP | F_DROPERRORCSUM;
        val = 0;
        if (chip_id(sc) < CHELSIO_T6 && t4_attack_filter != 0) {
                t4_set_reg_field(sc, A_TP_GLOBAL_CONFIG, F_ATTACKFILTERENABLE,
                    F_ATTACKFILTERENABLE);
                val |= F_DROPERRORATTACK;
        }
        if (t4_drop_ip_fragments != 0) {
                t4_set_reg_field(sc, A_TP_GLOBAL_CONFIG, F_FRAGMENTDROP,
                    F_FRAGMENTDROP);
                val |= F_DROPERRORFRAG;
        }
        if (t4_drop_pkts_with_l2_errors != 0)
                val |= F_DROPERRORMAC | F_DROPERRORETHHDRLEN;
        if (t4_drop_pkts_with_l3_errors != 0) {
                val |= F_DROPERRORIPVER | F_DROPERRORIPHDRLEN |
                    F_DROPERRORCSUMIP;
        }
        if (t4_drop_pkts_with_l4_errors != 0) {
                val |= F_DROPERRORTCPHDRLEN | F_DROPERRORPKTLEN |
                    F_DROPERRORTCPOPT | F_DROPERRORCSUM;
        }
        t4_set_reg_field(sc, A_TP_ERR_CONFIG, mask, val);

#ifdef TCP_OFFLOAD
        /*
         * Override the TOE timers with user provided tunables.  This is not the
         * recommended way to change the timers (the firmware config file is) so
         * these tunables are not documented.
         *
         * All the timer tunables are in microseconds.
         */
        if (t4_toe_keepalive_idle != 0) {
                v = us_to_tcp_ticks(sc, t4_toe_keepalive_idle);
                v &= M_KEEPALIVEIDLE;
                t4_set_reg_field(sc, A_TP_KEEP_IDLE,
                    V_KEEPALIVEIDLE(M_KEEPALIVEIDLE), V_KEEPALIVEIDLE(v));
        }
        if (t4_toe_keepalive_interval != 0) {
                v = us_to_tcp_ticks(sc, t4_toe_keepalive_interval);
                v &= M_KEEPALIVEINTVL;
                t4_set_reg_field(sc, A_TP_KEEP_INTVL,
                    V_KEEPALIVEINTVL(M_KEEPALIVEINTVL), V_KEEPALIVEINTVL(v));
        }
        if (t4_toe_keepalive_count != 0) {
                v = t4_toe_keepalive_count & M_KEEPALIVEMAXR2;
                t4_set_reg_field(sc, A_TP_SHIFT_CNT,
                    V_KEEPALIVEMAXR1(M_KEEPALIVEMAXR1) |
                    V_KEEPALIVEMAXR2(M_KEEPALIVEMAXR2),
                    V_KEEPALIVEMAXR1(1) | V_KEEPALIVEMAXR2(v));
        }
        if (t4_toe_rexmt_min != 0) {
                v = us_to_tcp_ticks(sc, t4_toe_rexmt_min);
                v &= M_RXTMIN;
                t4_set_reg_field(sc, A_TP_RXT_MIN,
                    V_RXTMIN(M_RXTMIN), V_RXTMIN(v));
        }
        if (t4_toe_rexmt_max != 0) {
                v = us_to_tcp_ticks(sc, t4_toe_rexmt_max);
                v &= M_RXTMAX;
                t4_set_reg_field(sc, A_TP_RXT_MAX,
                    V_RXTMAX(M_RXTMAX), V_RXTMAX(v));
        }
        if (t4_toe_rexmt_count != 0) {
                v = t4_toe_rexmt_count & M_RXTSHIFTMAXR2;
                t4_set_reg_field(sc, A_TP_SHIFT_CNT,
                    V_RXTSHIFTMAXR1(M_RXTSHIFTMAXR1) |
                    V_RXTSHIFTMAXR2(M_RXTSHIFTMAXR2),
                    V_RXTSHIFTMAXR1(1) | V_RXTSHIFTMAXR2(v));
        }
        for (i = 0; i < nitems(t4_toe_rexmt_backoff); i++) {
                if (t4_toe_rexmt_backoff[i] != -1) {
                        v = t4_toe_rexmt_backoff[i] & M_TIMERBACKOFFINDEX0;
                        shift = (i & 3) << 3;
                        t4_set_reg_field(sc, A_TP_TCP_BACKOFF_REG0 + (i & ~3),
                            M_TIMERBACKOFFINDEX0 << shift, v << shift);
                }
        }
#endif

#ifdef KERN_TLS
        if (sc->cryptocaps & FW_CAPS_CONFIG_TLSKEYS &&
            sc->toecaps & FW_CAPS_CONFIG_TOE) {
                /*
                 * Limit TOE connections to 2 reassembly "islands".  This is
                 * required for TOE TLS connections to downgrade to plain TOE
                 * connections if an unsupported TLS version or ciphersuite is
                 * used.
                 */
                t4_tp_wr_bits_indirect(sc, A_TP_FRAG_CONFIG,
                    V_PASSMODE(M_PASSMODE), V_PASSMODE(2));
                if (is_ktls(sc)) {
                        sc->tlst.inline_keys = t4_tls_inline_keys;
                        sc->tlst.combo_wrs = t4_tls_combo_wrs;
                        if (t4_kern_tls != 0)
                                t4_config_kern_tls(sc, true);
                }
        }
#endif
        return (0);
}

#undef FW_PARAM_PFVF
#undef FW_PARAM_DEV

static void
t4_set_desc(struct adapter *sc)
{
        char buf[128];
        struct adapter_params *p = &sc->params;

        snprintf(buf, sizeof(buf), "Chelsio %s", p->vpd.id);

        device_set_desc_copy(sc->dev, buf);
}

static inline void
ifmedia_add4(struct ifmedia *ifm, int m)
{

        ifmedia_add(ifm, m, 0, NULL);
        ifmedia_add(ifm, m | IFM_ETH_TXPAUSE, 0, NULL);
        ifmedia_add(ifm, m | IFM_ETH_RXPAUSE, 0, NULL);
        ifmedia_add(ifm, m | IFM_ETH_TXPAUSE | IFM_ETH_RXPAUSE, 0, NULL);
}

/*
 * This is the selected media, which is not quite the same as the active media.
 * The media line in ifconfig is "media: Ethernet selected (active)" if selected
 * and active are not the same, and "media: Ethernet selected" otherwise.
 */
static void
set_current_media(struct port_info *pi)
{
        struct link_config *lc;
        struct ifmedia *ifm;
        int mword;
        u_int speed;

        PORT_LOCK_ASSERT_OWNED(pi);

        /* Leave current media alone if it's already set to IFM_NONE. */
        ifm = &pi->media;
        if (ifm->ifm_cur != NULL &&
            IFM_SUBTYPE(ifm->ifm_cur->ifm_media) == IFM_NONE)
                return;

        lc = &pi->link_cfg;
        if (lc->requested_aneg != AUTONEG_DISABLE &&
            lc->pcaps & FW_PORT_CAP32_ANEG) {
                ifmedia_set(ifm, IFM_ETHER | IFM_AUTO);
                return;
        }
        mword = IFM_ETHER | IFM_FDX;
        if (lc->requested_fc & PAUSE_TX)
                mword |= IFM_ETH_TXPAUSE;
        if (lc->requested_fc & PAUSE_RX)
                mword |= IFM_ETH_RXPAUSE;
        if (lc->requested_speed == 0)
                speed = port_top_speed(pi) * 1000;      /* Gbps -> Mbps */
        else
                speed = lc->requested_speed;
        mword |= port_mword(pi, speed_to_fwcap(speed));
        ifmedia_set(ifm, mword);
}

/*
 * Returns true if the ifmedia list for the port cannot change.
 */
static bool
fixed_ifmedia(struct port_info *pi)
{

        return (pi->port_type == FW_PORT_TYPE_BT_SGMII ||
            pi->port_type == FW_PORT_TYPE_BT_XFI ||
            pi->port_type == FW_PORT_TYPE_BT_XAUI ||
            pi->port_type == FW_PORT_TYPE_KX4 ||
            pi->port_type == FW_PORT_TYPE_KX ||
            pi->port_type == FW_PORT_TYPE_KR ||
            pi->port_type == FW_PORT_TYPE_BP_AP ||
            pi->port_type == FW_PORT_TYPE_BP4_AP ||
            pi->port_type == FW_PORT_TYPE_BP40_BA ||
            pi->port_type == FW_PORT_TYPE_KR4_100G ||
            pi->port_type == FW_PORT_TYPE_KR_SFP28 ||
            pi->port_type == FW_PORT_TYPE_KR_XLAUI);
}

static void
build_medialist(struct port_info *pi)
{
        uint32_t ss, speed;
        int unknown, mword, bit;
        struct link_config *lc;
        struct ifmedia *ifm;

        PORT_LOCK_ASSERT_OWNED(pi);

        if (pi->flags & FIXED_IFMEDIA)
                return;

        /*
         * Rebuild the ifmedia list.
         */
        ifm = &pi->media;
        ifmedia_removeall(ifm);
        lc = &pi->link_cfg;
        ss = G_FW_PORT_CAP32_SPEED(lc->pcaps); /* Supported Speeds */
        if (__predict_false(ss == 0)) { /* not supposed to happen. */
                MPASS(ss != 0);
no_media:
                MPASS(LIST_EMPTY(&ifm->ifm_list));
                ifmedia_add(ifm, IFM_ETHER | IFM_NONE, 0, NULL);
                ifmedia_set(ifm, IFM_ETHER | IFM_NONE);
                return;
        }

        unknown = 0;
        for (bit = S_FW_PORT_CAP32_SPEED; bit < fls(ss); bit++) {
                speed = 1 << bit;
                MPASS(speed & M_FW_PORT_CAP32_SPEED);
                if (ss & speed) {
                        mword = port_mword(pi, speed);
                        if (mword == IFM_NONE) {
                                goto no_media;
                        } else if (mword == IFM_UNKNOWN)
                                unknown++;
                        else
                                ifmedia_add4(ifm, IFM_ETHER | IFM_FDX | mword);
                }
        }
        if (unknown > 0) /* Add one unknown for all unknown media types. */
                ifmedia_add4(ifm, IFM_ETHER | IFM_FDX | IFM_UNKNOWN);
        if (lc->pcaps & FW_PORT_CAP32_ANEG)
                ifmedia_add(ifm, IFM_ETHER | IFM_AUTO, 0, NULL);

        set_current_media(pi);
}

/*
 * Initialize the requested fields in the link config based on driver tunables.
 */
static void
init_link_config(struct port_info *pi)
{
        struct link_config *lc = &pi->link_cfg;

        PORT_LOCK_ASSERT_OWNED(pi);
        MPASS(lc->pcaps != 0);

        lc->requested_caps = 0;
        lc->requested_speed = 0;

        if (t4_autoneg == 0)
                lc->requested_aneg = AUTONEG_DISABLE;
        else if (t4_autoneg == 1)
                lc->requested_aneg = AUTONEG_ENABLE;
        else
                lc->requested_aneg = AUTONEG_AUTO;

        lc->requested_fc = t4_pause_settings & (PAUSE_TX | PAUSE_RX |
            PAUSE_AUTONEG);

        if (t4_fec & FEC_AUTO)
                lc->requested_fec = FEC_AUTO;
        else if (t4_fec == 0)
                lc->requested_fec = FEC_NONE;
        else {
                /* -1 is handled by the FEC_AUTO block above and not here. */
                lc->requested_fec = t4_fec &
                    (FEC_RS | FEC_BASER_RS | FEC_NONE | FEC_MODULE);
                if (lc->requested_fec == 0)
                        lc->requested_fec = FEC_AUTO;
        }
        lc->force_fec = 0;
        if (lc->pcaps & FW_PORT_CAP32_FORCE_FEC) {
                if (t4_force_fec < 0)
                        lc->force_fec = -1;
                else if (t4_force_fec > 0)
                        lc->force_fec = 1;
        }
}

/*
 * Makes sure that all requested settings comply with what's supported by the
 * port.  Returns the number of settings that were invalid and had to be fixed.
 */
static int
fixup_link_config(struct port_info *pi)
{
        int n = 0;
        struct link_config *lc = &pi->link_cfg;
        uint32_t fwspeed;

        PORT_LOCK_ASSERT_OWNED(pi);

        /* Speed (when not autonegotiating) */
        if (lc->requested_speed != 0) {
                fwspeed = speed_to_fwcap(lc->requested_speed);
                if ((fwspeed & lc->pcaps) == 0) {
                        n++;
                        lc->requested_speed = 0;
                }
        }

        /* Link autonegotiation */
        MPASS(lc->requested_aneg == AUTONEG_ENABLE ||
            lc->requested_aneg == AUTONEG_DISABLE ||
            lc->requested_aneg == AUTONEG_AUTO);
        if (lc->requested_aneg == AUTONEG_ENABLE &&
            !(lc->pcaps & FW_PORT_CAP32_ANEG)) {
                n++;
                lc->requested_aneg = AUTONEG_AUTO;
        }

        /* Flow control */
        MPASS((lc->requested_fc & ~(PAUSE_TX | PAUSE_RX | PAUSE_AUTONEG)) == 0);
        if (lc->requested_fc & PAUSE_TX &&
            !(lc->pcaps & FW_PORT_CAP32_FC_TX)) {
                n++;
                lc->requested_fc &= ~PAUSE_TX;
        }
        if (lc->requested_fc & PAUSE_RX &&
            !(lc->pcaps & FW_PORT_CAP32_FC_RX)) {
                n++;
                lc->requested_fc &= ~PAUSE_RX;
        }
        if (!(lc->requested_fc & PAUSE_AUTONEG) &&
            !(lc->pcaps & FW_PORT_CAP32_FORCE_PAUSE)) {
                n++;
                lc->requested_fc |= PAUSE_AUTONEG;
        }

        /* FEC */
        if ((lc->requested_fec & FEC_RS &&
            !(lc->pcaps & FW_PORT_CAP32_FEC_RS)) ||
            (lc->requested_fec & FEC_BASER_RS &&
            !(lc->pcaps & FW_PORT_CAP32_FEC_BASER_RS))) {
                n++;
                lc->requested_fec = FEC_AUTO;
        }

        return (n);
}

/*
 * Apply the requested L1 settings, which are expected to be valid, to the
 * hardware.
 */
static int
apply_link_config(struct port_info *pi)
{
        struct adapter *sc = pi->adapter;
        struct link_config *lc = &pi->link_cfg;
        int rc;

#ifdef INVARIANTS
        ASSERT_SYNCHRONIZED_OP(sc);
        PORT_LOCK_ASSERT_OWNED(pi);

        if (lc->requested_aneg == AUTONEG_ENABLE)
                MPASS(lc->pcaps & FW_PORT_CAP32_ANEG);
        if (!(lc->requested_fc & PAUSE_AUTONEG))
                MPASS(lc->pcaps & FW_PORT_CAP32_FORCE_PAUSE);
        if (lc->requested_fc & PAUSE_TX)
                MPASS(lc->pcaps & FW_PORT_CAP32_FC_TX);
        if (lc->requested_fc & PAUSE_RX)
                MPASS(lc->pcaps & FW_PORT_CAP32_FC_RX);
        if (lc->requested_fec & FEC_RS)
                MPASS(lc->pcaps & FW_PORT_CAP32_FEC_RS);
        if (lc->requested_fec & FEC_BASER_RS)
                MPASS(lc->pcaps & FW_PORT_CAP32_FEC_BASER_RS);
#endif
        rc = -t4_link_l1cfg(sc, sc->mbox, pi->tx_chan, lc);
        if (rc != 0) {
                /* Don't complain if the VF driver gets back an EPERM. */
                if (!(sc->flags & IS_VF) || rc != FW_EPERM)
                        device_printf(pi->dev, "l1cfg failed: %d\n", rc);
        } else {
                /*
                 * An L1_CFG will almost always result in a link-change event if
                 * the link is up, and the driver will refresh the actual
                 * fec/fc/etc. when the notification is processed.  If the link
                 * is down then the actual settings are meaningless.
                 *
                 * This takes care of the case where a change in the L1 settings
                 * may not result in a notification.
                 */
                if (lc->link_ok && !(lc->requested_fc & PAUSE_AUTONEG))
                        lc->fc = lc->requested_fc & (PAUSE_TX | PAUSE_RX);
        }
        return (rc);
}

#define FW_MAC_EXACT_CHUNK      7
struct mcaddr_ctx {
        struct ifnet *ifp;
        const uint8_t *mcaddr[FW_MAC_EXACT_CHUNK];
        uint64_t hash;
        int i;
        int del;
        int rc;
};

static u_int
add_maddr(void *arg, struct sockaddr_dl *sdl, u_int cnt)
{
        struct mcaddr_ctx *ctx = arg;
        struct vi_info *vi = ctx->ifp->if_softc;
        struct port_info *pi = vi->pi;
        struct adapter *sc = pi->adapter;

        if (ctx->rc < 0)
                return (0);

        ctx->mcaddr[ctx->i] = LLADDR(sdl);
        MPASS(ETHER_IS_MULTICAST(ctx->mcaddr[ctx->i]));
        ctx->i++;

        if (ctx->i == FW_MAC_EXACT_CHUNK) {
                ctx->rc = t4_alloc_mac_filt(sc, sc->mbox, vi->viid, ctx->del,
                    ctx->i, ctx->mcaddr, NULL, &ctx->hash, 0);
                if (ctx->rc < 0) {
                        int j;

                        for (j = 0; j < ctx->i; j++) {
                                if_printf(ctx->ifp,
                                    "failed to add mc address"
                                    " %02x:%02x:%02x:"
                                    "%02x:%02x:%02x rc=%d\n",
                                    ctx->mcaddr[j][0], ctx->mcaddr[j][1],
                                    ctx->mcaddr[j][2], ctx->mcaddr[j][3],
                                    ctx->mcaddr[j][4], ctx->mcaddr[j][5],
                                    -ctx->rc);
                        }
                        return (0);
                }
                ctx->del = 0;
                ctx->i = 0;
        }

        return (1);
}

/*
 * Program the port's XGMAC based on parameters in ifnet.  The caller also
 * indicates which parameters should be programmed (the rest are left alone).
 */
int
update_mac_settings(struct ifnet *ifp, int flags)
{
        int rc = 0;
        struct vi_info *vi = ifp->if_softc;
        struct port_info *pi = vi->pi;
        struct adapter *sc = pi->adapter;
        int mtu = -1, promisc = -1, allmulti = -1, vlanex = -1;
        uint8_t match_all_mac[ETHER_ADDR_LEN] = {0};

        ASSERT_SYNCHRONIZED_OP(sc);
        KASSERT(flags, ("%s: not told what to update.", __func__));

        if (flags & XGMAC_MTU)
                mtu = ifp->if_mtu;

        if (flags & XGMAC_PROMISC)
                promisc = ifp->if_flags & IFF_PROMISC ? 1 : 0;

        if (flags & XGMAC_ALLMULTI)
                allmulti = ifp->if_flags & IFF_ALLMULTI ? 1 : 0;

        if (flags & XGMAC_VLANEX)
                vlanex = ifp->if_capenable & IFCAP_VLAN_HWTAGGING ? 1 : 0;

        if (flags & (XGMAC_MTU|XGMAC_PROMISC|XGMAC_ALLMULTI|XGMAC_VLANEX)) {
                rc = -t4_set_rxmode(sc, sc->mbox, vi->viid, mtu, promisc,
                    allmulti, 1, vlanex, false);
                if (rc) {
                        if_printf(ifp, "set_rxmode (%x) failed: %d\n", flags,
                            rc);
                        return (rc);
                }
        }

        if (flags & XGMAC_UCADDR) {
                uint8_t ucaddr[ETHER_ADDR_LEN];

                bcopy(IF_LLADDR(ifp), ucaddr, sizeof(ucaddr));
                rc = t4_change_mac(sc, sc->mbox, vi->viid, vi->xact_addr_filt,
                    ucaddr, true, &vi->smt_idx);
                if (rc < 0) {
                        rc = -rc;
                        if_printf(ifp, "change_mac failed: %d\n", rc);
                        return (rc);
                } else {
                        vi->xact_addr_filt = rc;
                        rc = 0;
                }
        }

        if (flags & XGMAC_MCADDRS) {
                struct epoch_tracker et;
                struct mcaddr_ctx ctx;
                int j;

                ctx.ifp = ifp;
                ctx.hash = 0;
                ctx.i = 0;
                ctx.del = 1;
                ctx.rc = 0;
                /*
                 * Unlike other drivers, we accumulate list of pointers into
                 * interface address lists and we need to keep it safe even
                 * after if_foreach_llmaddr() returns, thus we must enter the
                 * network epoch.
                 */
                NET_EPOCH_ENTER(et);
                if_foreach_llmaddr(ifp, add_maddr, &ctx);
                if (ctx.rc < 0) {
                        NET_EPOCH_EXIT(et);
                        rc = -ctx.rc;
                        return (rc);
                }
                if (ctx.i > 0) {
                        rc = t4_alloc_mac_filt(sc, sc->mbox, vi->viid,
                            ctx.del, ctx.i, ctx.mcaddr, NULL, &ctx.hash, 0);
                        NET_EPOCH_EXIT(et);
                        if (rc < 0) {
                                rc = -rc;
                                for (j = 0; j < ctx.i; j++) {
                                        if_printf(ifp,
                                            "failed to add mcast address"
                                            " %02x:%02x:%02x:"
                                            "%02x:%02x:%02x rc=%d\n",
                                            ctx.mcaddr[j][0], ctx.mcaddr[j][1],
                                            ctx.mcaddr[j][2], ctx.mcaddr[j][3],
                                            ctx.mcaddr[j][4], ctx.mcaddr[j][5],
                                            rc);
                                }
                                return (rc);
                        }
                        ctx.del = 0;
                } else
                        NET_EPOCH_EXIT(et);

                rc = -t4_set_addr_hash(sc, sc->mbox, vi->viid, 0, ctx.hash, 0);
                if (rc != 0)
                        if_printf(ifp, "failed to set mcast address hash: %d\n",
                            rc);
                if (ctx.del == 0) {
                        /* We clobbered the VXLAN entry if there was one. */
                        pi->vxlan_tcam_entry = false;
                }
        }

        if (IS_MAIN_VI(vi) && sc->vxlan_refcount > 0 &&
            pi->vxlan_tcam_entry == false) {
                rc = t4_alloc_raw_mac_filt(sc, vi->viid, match_all_mac,
                    match_all_mac, sc->rawf_base + pi->port_id, 1, pi->port_id,
                    true);
                if (rc < 0) {
                        rc = -rc;
                        if_printf(ifp, "failed to add VXLAN TCAM entry: %d.\n",
                            rc);
                } else {
                        MPASS(rc == sc->rawf_base + pi->port_id);
                        rc = 0;
                        pi->vxlan_tcam_entry = true;
                }
        }

        return (rc);
}

/*
 * {begin|end}_synchronized_op must be called from the same thread.
 */
int
begin_synchronized_op(struct adapter *sc, struct vi_info *vi, int flags,
    char *wmesg)
{
        int rc, pri;

#ifdef WITNESS
        /* the caller thinks it's ok to sleep, but is it really? */
        if (flags & SLEEP_OK)
                WITNESS_WARN(WARN_GIANTOK | WARN_SLEEPOK, NULL,
                    "begin_synchronized_op");
#endif

        if (INTR_OK)
                pri = PCATCH;
        else
                pri = 0;

        ADAPTER_LOCK(sc);
        for (;;) {

                if (vi && IS_DOOMED(vi)) {
                        rc = ENXIO;
                        goto done;
                }

                if (!IS_BUSY(sc)) {
                        rc = 0;
                        break;
                }

                if (!(flags & SLEEP_OK)) {
                        rc = EBUSY;
                        goto done;
                }

                if (mtx_sleep(&sc->flags, &sc->sc_lock, pri, wmesg, 0)) {
                        rc = EINTR;
                        goto done;
                }
        }

        KASSERT(!IS_BUSY(sc), ("%s: controller busy.", __func__));
        SET_BUSY(sc);
#ifdef INVARIANTS
        sc->last_op = wmesg;
        sc->last_op_thr = curthread;
        sc->last_op_flags = flags;
#endif

done:
        if (!(flags & HOLD_LOCK) || rc)
                ADAPTER_UNLOCK(sc);

        return (rc);
}

/*
 * Tell if_ioctl and if_init that the VI is going away.  This is
 * special variant of begin_synchronized_op and must be paired with a
 * call to end_synchronized_op.
 */
void
doom_vi(struct adapter *sc, struct vi_info *vi)
{

        ADAPTER_LOCK(sc);
        SET_DOOMED(vi);
        wakeup(&sc->flags);
        while (IS_BUSY(sc))
                mtx_sleep(&sc->flags, &sc->sc_lock, 0, "t4detach", 0);
        SET_BUSY(sc);
#ifdef INVARIANTS
        sc->last_op = "t4detach";
        sc->last_op_thr = curthread;
        sc->last_op_flags = 0;
#endif
        ADAPTER_UNLOCK(sc);
}

/*
 * {begin|end}_synchronized_op must be called from the same thread.
 */
void
end_synchronized_op(struct adapter *sc, int flags)
{

        if (flags & LOCK_HELD)
                ADAPTER_LOCK_ASSERT_OWNED(sc);
        else
                ADAPTER_LOCK(sc);

        KASSERT(IS_BUSY(sc), ("%s: controller not busy.", __func__));
        CLR_BUSY(sc);
        wakeup(&sc->flags);
        ADAPTER_UNLOCK(sc);
}

static int
cxgbe_init_synchronized(struct vi_info *vi)
{
        struct port_info *pi = vi->pi;
        struct adapter *sc = pi->adapter;
        struct ifnet *ifp = vi->ifp;
        int rc = 0, i;
        struct sge_txq *txq;

        ASSERT_SYNCHRONIZED_OP(sc);

        if (ifp->if_drv_flags & IFF_DRV_RUNNING)
                return (0);     /* already running */

        if (!(sc->flags & FULL_INIT_DONE) && ((rc = adapter_init(sc)) != 0))
                return (rc);    /* error message displayed already */

        if (!(vi->flags & VI_INIT_DONE) && ((rc = vi_init(vi)) != 0))
                return (rc); /* error message displayed already */

        rc = update_mac_settings(ifp, XGMAC_ALL);
        if (rc)
                goto done;      /* error message displayed already */

        PORT_LOCK(pi);
        if (pi->up_vis == 0) {
                t4_update_port_info(pi);
                fixup_link_config(pi);
                build_medialist(pi);
                apply_link_config(pi);
        }

        rc = -t4_enable_vi(sc, sc->mbox, vi->viid, true, true);
        if (rc != 0) {
                if_printf(ifp, "enable_vi failed: %d\n", rc);
                PORT_UNLOCK(pi);
                goto done;
        }

        /*
         * Can't fail from this point onwards.  Review cxgbe_uninit_synchronized
         * if this changes.
         */

        for_each_txq(vi, i, txq) {
                TXQ_LOCK(txq);
                txq->eq.flags |= EQ_ENABLED;
                TXQ_UNLOCK(txq);
        }

        /*
         * The first iq of the first port to come up is used for tracing.
         */
        if (sc->traceq < 0 && IS_MAIN_VI(vi)) {
                sc->traceq = sc->sge.rxq[vi->first_rxq].iq.abs_id;
                t4_write_reg(sc, is_t4(sc) ?  A_MPS_TRC_RSS_CONTROL :
                    A_MPS_T5_TRC_RSS_CONTROL, V_RSSCONTROL(pi->tx_chan) |
                    V_QUEUENUMBER(sc->traceq));
                pi->flags |= HAS_TRACEQ;
        }

        /* all ok */
        pi->up_vis++;
        ifp->if_drv_flags |= IFF_DRV_RUNNING;
        if (pi->link_cfg.link_ok)
                t4_os_link_changed(pi);
        PORT_UNLOCK(pi);

        mtx_lock(&vi->tick_mtx);
        if (ifp->if_get_counter == vi_get_counter)
                callout_reset(&vi->tick, hz, vi_tick, vi);
        else
                callout_reset(&vi->tick, hz, cxgbe_tick, vi);
        mtx_unlock(&vi->tick_mtx);
done:
        if (rc != 0)
                cxgbe_uninit_synchronized(vi);

        return (rc);
}

/*
 * Idempotent.
 */
static int
cxgbe_uninit_synchronized(struct vi_info *vi)
{
        struct port_info *pi = vi->pi;
        struct adapter *sc = pi->adapter;
        struct ifnet *ifp = vi->ifp;
        int rc, i;
        struct sge_txq *txq;

        ASSERT_SYNCHRONIZED_OP(sc);

        if (!(vi->flags & VI_INIT_DONE)) {
                if (__predict_false(ifp->if_drv_flags & IFF_DRV_RUNNING)) {
                        KASSERT(0, ("uninited VI is running"));
                        if_printf(ifp, "uninited VI with running ifnet.  "
                            "vi->flags 0x%016lx, if_flags 0x%08x, "
                            "if_drv_flags 0x%08x\n", vi->flags, ifp->if_flags,
                            ifp->if_drv_flags);
                }
                return (0);
        }

        /*
         * Disable the VI so that all its data in either direction is discarded
         * by the MPS.  Leave everything else (the queues, interrupts, and 1Hz
         * tick) intact as the TP can deliver negative advice or data that it's
         * holding in its RAM (for an offloaded connection) even after the VI is
         * disabled.
         */
        rc = -t4_enable_vi(sc, sc->mbox, vi->viid, false, false);
        if (rc) {
                if_printf(ifp, "disable_vi failed: %d\n", rc);
                return (rc);
        }

        for_each_txq(vi, i, txq) {
                TXQ_LOCK(txq);
                txq->eq.flags &= ~EQ_ENABLED;
                TXQ_UNLOCK(txq);
        }

        mtx_lock(&vi->tick_mtx);
        callout_stop(&vi->tick);
        mtx_unlock(&vi->tick_mtx);

        PORT_LOCK(pi);
        if (!(ifp->if_drv_flags & IFF_DRV_RUNNING)) {
                PORT_UNLOCK(pi);
                return (0);
        }
        ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
        pi->up_vis--;
        if (pi->up_vis > 0) {
                PORT_UNLOCK(pi);
                return (0);
        }

        pi->link_cfg.link_ok = false;
        pi->link_cfg.speed = 0;
        pi->link_cfg.link_down_rc = 255;
        t4_os_link_changed(pi);
        PORT_UNLOCK(pi);

        return (0);
}

/*
 * It is ok for this function to fail midway and return right away.  t4_detach
 * will walk the entire sc->irq list and clean up whatever is valid.
 */
int
t4_setup_intr_handlers(struct adapter *sc)
{
        int rc, rid, p, q, v;
        char s[8];
        struct irq *irq;
        struct port_info *pi;
        struct vi_info *vi;
        struct sge *sge = &sc->sge;
        struct sge_rxq *rxq;
#ifdef TCP_OFFLOAD
        struct sge_ofld_rxq *ofld_rxq;
#endif
#ifdef DEV_NETMAP
        struct sge_nm_rxq *nm_rxq;
#endif
#ifdef RSS
        int nbuckets = rss_getnumbuckets();
#endif

        /*
         * Setup interrupts.
         */
        irq = &sc->irq[0];
        rid = sc->intr_type == INTR_INTX ? 0 : 1;
        if (forwarding_intr_to_fwq(sc))
                return (t4_alloc_irq(sc, irq, rid, t4_intr_all, sc, "all"));

        /* Multiple interrupts. */
        if (sc->flags & IS_VF)
                KASSERT(sc->intr_count >= T4VF_EXTRA_INTR + sc->params.nports,
                    ("%s: too few intr.", __func__));
        else
                KASSERT(sc->intr_count >= T4_EXTRA_INTR + sc->params.nports,
                    ("%s: too few intr.", __func__));

        /* The first one is always error intr on PFs */
        if (!(sc->flags & IS_VF)) {
                rc = t4_alloc_irq(sc, irq, rid, t4_intr_err, sc, "err");
                if (rc != 0)
                        return (rc);
                irq++;
                rid++;
        }

        /* The second one is always the firmware event queue (first on VFs) */
        rc = t4_alloc_irq(sc, irq, rid, t4_intr_evt, &sge->fwq, "evt");
        if (rc != 0)
                return (rc);
        irq++;
        rid++;

        for_each_port(sc, p) {
                pi = sc->port[p];
                for_each_vi(pi, v, vi) {
                        vi->first_intr = rid - 1;

                        if (vi->nnmrxq > 0) {
                                int n = max(vi->nrxq, vi->nnmrxq);

                                rxq = &sge->rxq[vi->first_rxq];
#ifdef DEV_NETMAP
                                nm_rxq = &sge->nm_rxq[vi->first_nm_rxq];
#endif
                                for (q = 0; q < n; q++) {
                                        snprintf(s, sizeof(s), "%x%c%x", p,
                                            'a' + v, q);
                                        if (q < vi->nrxq)
                                                irq->rxq = rxq++;
#ifdef DEV_NETMAP
                                        if (q < vi->nnmrxq)
                                                irq->nm_rxq = nm_rxq++;

                                        if (irq->nm_rxq != NULL &&
                                            irq->rxq == NULL) {
                                                /* Netmap rx only */
                                                rc = t4_alloc_irq(sc, irq, rid,
                                                    t4_nm_intr, irq->nm_rxq, s);
                                        }
                                        if (irq->nm_rxq != NULL &&
                                            irq->rxq != NULL) {
                                                /* NIC and Netmap rx */
                                                rc = t4_alloc_irq(sc, irq, rid,
                                                    t4_vi_intr, irq, s);
                                        }
#endif
                                        if (irq->rxq != NULL &&
                                            irq->nm_rxq == NULL) {
                                                /* NIC rx only */
                                                rc = t4_alloc_irq(sc, irq, rid,
                                                    t4_intr, irq->rxq, s);
                                        }
                                        if (rc != 0)
                                                return (rc);
#ifdef RSS
                                        if (q < vi->nrxq) {
                                                bus_bind_intr(sc->dev, irq->res,
                                                    rss_getcpu(q % nbuckets));
                                        }
#endif
                                        irq++;
                                        rid++;
                                        vi->nintr++;
                                }
                        } else {
                                for_each_rxq(vi, q, rxq) {
                                        snprintf(s, sizeof(s), "%x%c%x", p,
                                            'a' + v, q);
                                        rc = t4_alloc_irq(sc, irq, rid,
                                            t4_intr, rxq, s);
                                        if (rc != 0)
                                                return (rc);
#ifdef RSS
                                        bus_bind_intr(sc->dev, irq->res,
                                            rss_getcpu(q % nbuckets));
#endif
                                        irq++;
                                        rid++;
                                        vi->nintr++;
                                }
                        }
#ifdef TCP_OFFLOAD
                        for_each_ofld_rxq(vi, q, ofld_rxq) {
                                snprintf(s, sizeof(s), "%x%c%x", p, 'A' + v, q);
                                rc = t4_alloc_irq(sc, irq, rid, t4_intr,
                                    ofld_rxq, s);
                                if (rc != 0)
                                        return (rc);
                                irq++;
                                rid++;
                                vi->nintr++;
                        }
#endif
                }
        }
        MPASS(irq == &sc->irq[sc->intr_count]);

        return (0);
}

static void
write_global_rss_key(struct adapter *sc)
{
#ifdef RSS
        int i;
        uint32_t raw_rss_key[RSS_KEYSIZE / sizeof(uint32_t)];
        uint32_t rss_key[RSS_KEYSIZE / sizeof(uint32_t)];

        CTASSERT(RSS_KEYSIZE == 40);

        rss_getkey((void *)&raw_rss_key[0]);
        for (i = 0; i < nitems(rss_key); i++) {
                rss_key[i] = htobe32(raw_rss_key[nitems(rss_key) - 1 - i]);
        }
        t4_write_rss_key(sc, &rss_key[0], -1, 1);
#endif
}

/*
 * Idempotent.
 */
static int
adapter_full_init(struct adapter *sc)
{
        int rc, i;

        ASSERT_SYNCHRONIZED_OP(sc);

        if (!(sc->flags & ADAP_SYSCTL_CTX)) {
                sysctl_ctx_init(&sc->ctx);
                sc->flags |= ADAP_SYSCTL_CTX;
        }

        /*
         * queues that belong to the adapter (not any particular port).
         */
        rc = t4_setup_adapter_queues(sc);
        if (rc != 0)
                return (rc);

        for (i = 0; i < nitems(sc->tq); i++) {
                if (sc->tq[i] != NULL)
                        continue;
                sc->tq[i] = taskqueue_create("t4 taskq", M_NOWAIT,
                    taskqueue_thread_enqueue, &sc->tq[i]);
                if (sc->tq[i] == NULL) {
                        CH_ERR(sc, "failed to allocate task queue %d\n", i);
                        return (ENOMEM);
                }
                taskqueue_start_threads(&sc->tq[i], 1, PI_NET, "%s tq%d",
                    device_get_nameunit(sc->dev), i);
        }

        if (!(sc->flags & IS_VF)) {
                write_global_rss_key(sc);
                t4_intr_enable(sc);
        }
        return (0);
}

int
adapter_init(struct adapter *sc)
{
        int rc;

        ASSERT_SYNCHRONIZED_OP(sc);
        ADAPTER_LOCK_ASSERT_NOTOWNED(sc);
        KASSERT((sc->flags & FULL_INIT_DONE) == 0,
            ("%s: FULL_INIT_DONE already", __func__));

        rc = adapter_full_init(sc);
        if (rc != 0)
                adapter_full_uninit(sc);
        else
                sc->flags |= FULL_INIT_DONE;

        return (rc);
}

/*
 * Idempotent.
 */
static void
adapter_full_uninit(struct adapter *sc)
{
        int i;

        /* Do this before freeing the adapter queues. */
        if (sc->flags & ADAP_SYSCTL_CTX) {
                sysctl_ctx_free(&sc->ctx);
                sc->flags &= ~ADAP_SYSCTL_CTX;
        }

        t4_teardown_adapter_queues(sc);

        for (i = 0; i < nitems(sc->tq) && sc->tq[i]; i++) {
                taskqueue_free(sc->tq[i]);
                sc->tq[i] = NULL;
        }

        sc->flags &= ~FULL_INIT_DONE;
}

#ifdef RSS
#define SUPPORTED_RSS_HASHTYPES (RSS_HASHTYPE_RSS_IPV4 | \
    RSS_HASHTYPE_RSS_TCP_IPV4 | RSS_HASHTYPE_RSS_IPV6 | \
    RSS_HASHTYPE_RSS_TCP_IPV6 | RSS_HASHTYPE_RSS_UDP_IPV4 | \
    RSS_HASHTYPE_RSS_UDP_IPV6)

/* Translates kernel hash types to hardware. */
static int
hashconfig_to_hashen(int hashconfig)
{
        int hashen = 0;

        if (hashconfig & RSS_HASHTYPE_RSS_IPV4)
                hashen |= F_FW_RSS_VI_CONFIG_CMD_IP4TWOTUPEN;
        if (hashconfig & RSS_HASHTYPE_RSS_IPV6)
                hashen |= F_FW_RSS_VI_CONFIG_CMD_IP6TWOTUPEN;
        if (hashconfig & RSS_HASHTYPE_RSS_UDP_IPV4) {
                hashen |= F_FW_RSS_VI_CONFIG_CMD_UDPEN |
                    F_FW_RSS_VI_CONFIG_CMD_IP4FOURTUPEN;
        }
        if (hashconfig & RSS_HASHTYPE_RSS_UDP_IPV6) {
                hashen |= F_FW_RSS_VI_CONFIG_CMD_UDPEN |
                    F_FW_RSS_VI_CONFIG_CMD_IP6FOURTUPEN;
        }
        if (hashconfig & RSS_HASHTYPE_RSS_TCP_IPV4)
                hashen |= F_FW_RSS_VI_CONFIG_CMD_IP4FOURTUPEN;
        if (hashconfig & RSS_HASHTYPE_RSS_TCP_IPV6)
                hashen |= F_FW_RSS_VI_CONFIG_CMD_IP6FOURTUPEN;

        return (hashen);
}

/* Translates hardware hash types to kernel. */
static int
hashen_to_hashconfig(int hashen)
{
        int hashconfig = 0;

        if (hashen & F_FW_RSS_VI_CONFIG_CMD_UDPEN) {
                /*
                 * If UDP hashing was enabled it must have been enabled for
                 * either IPv4 or IPv6 (inclusive or).  Enabling UDP without
                 * enabling any 4-tuple hash is nonsense configuration.
                 */
                MPASS(hashen & (F_FW_RSS_VI_CONFIG_CMD_IP4FOURTUPEN |
                    F_FW_RSS_VI_CONFIG_CMD_IP6FOURTUPEN));

                if (hashen & F_FW_RSS_VI_CONFIG_CMD_IP4FOURTUPEN)
                        hashconfig |= RSS_HASHTYPE_RSS_UDP_IPV4;
                if (hashen & F_FW_RSS_VI_CONFIG_CMD_IP6FOURTUPEN)
                        hashconfig |= RSS_HASHTYPE_RSS_UDP_IPV6;
        }
        if (hashen & F_FW_RSS_VI_CONFIG_CMD_IP4FOURTUPEN)
                hashconfig |= RSS_HASHTYPE_RSS_TCP_IPV4;
        if (hashen & F_FW_RSS_VI_CONFIG_CMD_IP6FOURTUPEN)
                hashconfig |= RSS_HASHTYPE_RSS_TCP_IPV6;
        if (hashen & F_FW_RSS_VI_CONFIG_CMD_IP4TWOTUPEN)
                hashconfig |= RSS_HASHTYPE_RSS_IPV4;
        if (hashen & F_FW_RSS_VI_CONFIG_CMD_IP6TWOTUPEN)
                hashconfig |= RSS_HASHTYPE_RSS_IPV6;

        return (hashconfig);
}
#endif

/*
 * Idempotent.
 */
static int
vi_full_init(struct vi_info *vi)
{
        struct adapter *sc = vi->adapter;
        struct sge_rxq *rxq;
        int rc, i, j;
#ifdef RSS
        int nbuckets = rss_getnumbuckets();
        int hashconfig = rss_gethashconfig();
        int extra;
#endif

        ASSERT_SYNCHRONIZED_OP(sc);

        if (!(vi->flags & VI_SYSCTL_CTX)) {
                sysctl_ctx_init(&vi->ctx);
                vi->flags |= VI_SYSCTL_CTX;
        }

        /*
         * Allocate tx/rx/fl queues for this VI.
         */
        rc = t4_setup_vi_queues(vi);
        if (rc != 0)
                return (rc);

        /*
         * Setup RSS for this VI.  Save a copy of the RSS table for later use.
         */
        if (vi->nrxq > vi->rss_size) {
                CH_ALERT(vi, "nrxq (%d) > hw RSS table size (%d); "
                    "some queues will never receive traffic.\n", vi->nrxq,
                    vi->rss_size);
        } else if (vi->rss_size % vi->nrxq) {
                CH_ALERT(vi, "nrxq (%d), hw RSS table size (%d); "
                    "expect uneven traffic distribution.\n", vi->nrxq,
                    vi->rss_size);
        }
#ifdef RSS
        if (vi->nrxq != nbuckets) {
                CH_ALERT(vi, "nrxq (%d) != kernel RSS buckets (%d);"
                    "performance will be impacted.\n", vi->nrxq, nbuckets);
        }
#endif
        if (vi->rss == NULL)
                vi->rss = malloc(vi->rss_size * sizeof (*vi->rss), M_CXGBE,
                    M_ZERO | M_WAITOK);
        for (i = 0; i < vi->rss_size;) {
#ifdef RSS
                j = rss_get_indirection_to_bucket(i);
                j %= vi->nrxq;
                rxq = &sc->sge.rxq[vi->first_rxq + j];
                vi->rss[i++] = rxq->iq.abs_id;
#else
                for_each_rxq(vi, j, rxq) {
                        vi->rss[i++] = rxq->iq.abs_id;
                        if (i == vi->rss_size)
                                break;
                }
#endif
        }

        rc = -t4_config_rss_range(sc, sc->mbox, vi->viid, 0, vi->rss_size,
            vi->rss, vi->rss_size);
        if (rc != 0) {
                CH_ERR(vi, "rss_config failed: %d\n", rc);
                return (rc);
        }

#ifdef RSS
        vi->hashen = hashconfig_to_hashen(hashconfig);

        /*
         * We may have had to enable some hashes even though the global config
         * wants them disabled.  This is a potential problem that must be
         * reported to the user.
         */
        extra = hashen_to_hashconfig(vi->hashen) ^ hashconfig;

        /*
         * If we consider only the supported hash types, then the enabled hashes
         * are a superset of the requested hashes.  In other words, there cannot
         * be any supported hash that was requested but not enabled, but there
         * can be hashes that were not requested but had to be enabled.
         */
        extra &= SUPPORTED_RSS_HASHTYPES;
        MPASS((extra & hashconfig) == 0);

        if (extra) {
                CH_ALERT(vi,
                    "global RSS config (0x%x) cannot be accommodated.\n",
                    hashconfig);
        }
        if (extra & RSS_HASHTYPE_RSS_IPV4)
                CH_ALERT(vi, "IPv4 2-tuple hashing forced on.\n");
        if (extra & RSS_HASHTYPE_RSS_TCP_IPV4)
                CH_ALERT(vi, "TCP/IPv4 4-tuple hashing forced on.\n");
        if (extra & RSS_HASHTYPE_RSS_IPV6)
                CH_ALERT(vi, "IPv6 2-tuple hashing forced on.\n");
        if (extra & RSS_HASHTYPE_RSS_TCP_IPV6)
                CH_ALERT(vi, "TCP/IPv6 4-tuple hashing forced on.\n");
        if (extra & RSS_HASHTYPE_RSS_UDP_IPV4)
                CH_ALERT(vi, "UDP/IPv4 4-tuple hashing forced on.\n");
        if (extra & RSS_HASHTYPE_RSS_UDP_IPV6)
                CH_ALERT(vi, "UDP/IPv6 4-tuple hashing forced on.\n");
#else
        vi->hashen = F_FW_RSS_VI_CONFIG_CMD_IP6FOURTUPEN |
            F_FW_RSS_VI_CONFIG_CMD_IP6TWOTUPEN |
            F_FW_RSS_VI_CONFIG_CMD_IP4FOURTUPEN |
            F_FW_RSS_VI_CONFIG_CMD_IP4TWOTUPEN | F_FW_RSS_VI_CONFIG_CMD_UDPEN;
#endif
        rc = -t4_config_vi_rss(sc, sc->mbox, vi->viid, vi->hashen, vi->rss[0],
            0, 0);
        if (rc != 0) {
                CH_ERR(vi, "rss hash/defaultq config failed: %d\n", rc);
                return (rc);
        }

        return (0);
}

int
vi_init(struct vi_info *vi)
{
        int rc;

        ASSERT_SYNCHRONIZED_OP(vi->adapter);
        KASSERT((vi->flags & VI_INIT_DONE) == 0,
            ("%s: VI_INIT_DONE already", __func__));

        rc = vi_full_init(vi);
        if (rc != 0)
                vi_full_uninit(vi);
        else
                vi->flags |= VI_INIT_DONE;

        return (rc);
}

/*
 * Idempotent.
 */
static void
vi_full_uninit(struct vi_info *vi)
{

        if (vi->flags & VI_INIT_DONE) {
                quiesce_vi(vi);
                free(vi->rss, M_CXGBE);
                free(vi->nm_rss, M_CXGBE);
        }

        /* Do this before freeing the VI queues. */
        if (vi->flags & VI_SYSCTL_CTX) {
                sysctl_ctx_free(&vi->ctx);
                vi->flags &= ~VI_SYSCTL_CTX;
        }

        t4_teardown_vi_queues(vi);
        vi->flags &= ~VI_INIT_DONE;
}

static void
quiesce_txq(struct sge_txq *txq)
{
        struct sge_eq *eq = &txq->eq;
        struct sge_qstat *spg = (void *)&eq->desc[eq->sidx];

        MPASS(eq->flags & EQ_SW_ALLOCATED);
        MPASS(!(eq->flags & EQ_ENABLED));

        /* Wait for the mp_ring to empty. */
        while (!mp_ring_is_idle(txq->r)) {
                mp_ring_check_drainage(txq->r, 4096);
                pause("rquiesce", 1);
        }
        MPASS(txq->txp.npkt == 0);

        if (eq->flags & EQ_HW_ALLOCATED) {
                /*
                 * Hardware is alive and working normally.  Wait for it to
                 * finish and then wait for the driver to catch up and reclaim
                 * all descriptors.
                 */
                while (spg->cidx != htobe16(eq->pidx))
                        pause("equiesce", 1);
                while (eq->cidx != eq->pidx)
                        pause("dquiesce", 1);
        } else {
                /*
                 * Hardware is unavailable.  Discard all pending tx and reclaim
                 * descriptors directly.
                 */
                TXQ_LOCK(txq);
                while (eq->cidx != eq->pidx) {
                        struct mbuf *m, *nextpkt;
                        struct tx_sdesc *txsd;

                        txsd = &txq->sdesc[eq->cidx];
                        for (m = txsd->m; m != NULL; m = nextpkt) {
                                nextpkt = m->m_nextpkt;
                                m->m_nextpkt = NULL;
                                m_freem(m);
                        }
                        IDXINCR(eq->cidx, txsd->desc_used, eq->sidx);
                }
                spg->pidx = spg->cidx = htobe16(eq->cidx);
                TXQ_UNLOCK(txq);
        }
}

static void
quiesce_wrq(struct sge_wrq *wrq)
{

        /* XXXTX */
}

static void
quiesce_iq_fl(struct adapter *sc, struct sge_iq *iq, struct sge_fl *fl)
{
        /* Synchronize with the interrupt handler */
        while (!atomic_cmpset_int(&iq->state, IQS_IDLE, IQS_DISABLED))
                pause("iqfree", 1);

        if (fl != NULL) {
                MPASS(iq->flags & IQ_HAS_FL);

                mtx_lock(&sc->sfl_lock);
                FL_LOCK(fl);
                fl->flags |= FL_DOOMED;
                FL_UNLOCK(fl);
                callout_stop(&sc->sfl_callout);
                mtx_unlock(&sc->sfl_lock);

                KASSERT((fl->flags & FL_STARVING) == 0,
                    ("%s: still starving", __func__));

                /* Release all buffers if hardware is no longer available. */
                if (!(iq->flags & IQ_HW_ALLOCATED))
                        free_fl_buffers(sc, fl);
        }
}

/*
 * Wait for all activity on all the queues of the VI to complete.  It is assumed
 * that no new work is being enqueued by the hardware or the driver.  That part
 * should be arranged before calling this function.
 */
static void
quiesce_vi(struct vi_info *vi)
{
        int i;
        struct adapter *sc = vi->adapter;
        struct sge_rxq *rxq;
        struct sge_txq *txq;
#ifdef TCP_OFFLOAD
        struct sge_ofld_rxq *ofld_rxq;
#endif
#if defined(TCP_OFFLOAD) || defined(RATELIMIT)
        struct sge_ofld_txq *ofld_txq;
#endif

        if (!(vi->flags & VI_INIT_DONE))
                return;

        for_each_txq(vi, i, txq) {
                quiesce_txq(txq);
        }

#if defined(TCP_OFFLOAD) || defined(RATELIMIT)
        for_each_ofld_txq(vi, i, ofld_txq) {
                quiesce_wrq(&ofld_txq->wrq);
        }
#endif

        for_each_rxq(vi, i, rxq) {
                quiesce_iq_fl(sc, &rxq->iq, &rxq->fl);
        }

#ifdef TCP_OFFLOAD
        for_each_ofld_rxq(vi, i, ofld_rxq) {
                quiesce_iq_fl(sc, &ofld_rxq->iq, &ofld_rxq->fl);
        }
#endif
}

static int
t4_alloc_irq(struct adapter *sc, struct irq *irq, int rid,
    driver_intr_t *handler, void *arg, char *name)
{
        int rc;

        irq->rid = rid;
        irq->res = bus_alloc_resource_any(sc->dev, SYS_RES_IRQ, &irq->rid,
            RF_SHAREABLE | RF_ACTIVE);
        if (irq->res == NULL) {
                device_printf(sc->dev,
                    "failed to allocate IRQ for rid %d, name %s.\n", rid, name);
                return (ENOMEM);
        }

        rc = bus_setup_intr(sc->dev, irq->res, INTR_MPSAFE | INTR_TYPE_NET,
            NULL, handler, arg, &irq->tag);
        if (rc != 0) {
                device_printf(sc->dev,
                    "failed to setup interrupt for rid %d, name %s: %d\n",
                    rid, name, rc);
        } else if (name)
                bus_describe_intr(sc->dev, irq->res, irq->tag, "%s", name);

        return (rc);
}

static int
t4_free_irq(struct adapter *sc, struct irq *irq)
{
        if (irq->tag)
                bus_teardown_intr(sc->dev, irq->res, irq->tag);
        if (irq->res)
                bus_release_resource(sc->dev, SYS_RES_IRQ, irq->rid, irq->res);

        bzero(irq, sizeof(*irq));

        return (0);
}

static void
get_regs(struct adapter *sc, struct t4_regdump *regs, uint8_t *buf)
{

        regs->version = chip_id(sc) | chip_rev(sc) << 10;
        t4_get_regs(sc, buf, regs->len);
}

#define A_PL_INDIR_CMD  0x1f8

#define S_PL_AUTOINC    31
#define M_PL_AUTOINC    0x1U
#define V_PL_AUTOINC(x) ((x) << S_PL_AUTOINC)
#define G_PL_AUTOINC(x) (((x) >> S_PL_AUTOINC) & M_PL_AUTOINC)

#define S_PL_VFID       20
#define M_PL_VFID       0xffU
#define V_PL_VFID(x)    ((x) << S_PL_VFID)
#define G_PL_VFID(x)    (((x) >> S_PL_VFID) & M_PL_VFID)

#define S_PL_ADDR       0
#define M_PL_ADDR       0xfffffU
#define V_PL_ADDR(x)    ((x) << S_PL_ADDR)
#define G_PL_ADDR(x)    (((x) >> S_PL_ADDR) & M_PL_ADDR)

#define A_PL_INDIR_DATA 0x1fc

static uint64_t
read_vf_stat(struct adapter *sc, u_int vin, int reg)
{
        u32 stats[2];

        if (sc->flags & IS_VF) {
                stats[0] = t4_read_reg(sc, VF_MPS_REG(reg));
                stats[1] = t4_read_reg(sc, VF_MPS_REG(reg + 4));
        } else {
                mtx_assert(&sc->reg_lock, MA_OWNED);
                t4_write_reg(sc, A_PL_INDIR_CMD, V_PL_AUTOINC(1) |
                    V_PL_VFID(vin) | V_PL_ADDR(VF_MPS_REG(reg)));
                stats[0] = t4_read_reg(sc, A_PL_INDIR_DATA);
                stats[1] = t4_read_reg(sc, A_PL_INDIR_DATA);
        }
        return (((uint64_t)stats[1]) << 32 | stats[0]);
}

static void
t4_get_vi_stats(struct adapter *sc, u_int vin, struct fw_vi_stats_vf *stats)
{

#define GET_STAT(name) \
        read_vf_stat(sc, vin, A_MPS_VF_STAT_##name##_L)

        if (!(sc->flags & IS_VF))
                mtx_lock(&sc->reg_lock);
        stats->tx_bcast_bytes    = GET_STAT(TX_VF_BCAST_BYTES);
        stats->tx_bcast_frames   = GET_STAT(TX_VF_BCAST_FRAMES);
        stats->tx_mcast_bytes    = GET_STAT(TX_VF_MCAST_BYTES);
        stats->tx_mcast_frames   = GET_STAT(TX_VF_MCAST_FRAMES);
        stats->tx_ucast_bytes    = GET_STAT(TX_VF_UCAST_BYTES);
        stats->tx_ucast_frames   = GET_STAT(TX_VF_UCAST_FRAMES);
        stats->tx_drop_frames    = GET_STAT(TX_VF_DROP_FRAMES);
        stats->tx_offload_bytes  = GET_STAT(TX_VF_OFFLOAD_BYTES);
        stats->tx_offload_frames = GET_STAT(TX_VF_OFFLOAD_FRAMES);
        stats->rx_bcast_bytes    = GET_STAT(RX_VF_BCAST_BYTES);
        stats->rx_bcast_frames   = GET_STAT(RX_VF_BCAST_FRAMES);
        stats->rx_mcast_bytes    = GET_STAT(RX_VF_MCAST_BYTES);
        stats->rx_mcast_frames   = GET_STAT(RX_VF_MCAST_FRAMES);
        stats->rx_ucast_bytes    = GET_STAT(RX_VF_UCAST_BYTES);
        stats->rx_ucast_frames   = GET_STAT(RX_VF_UCAST_FRAMES);
        stats->rx_err_frames     = GET_STAT(RX_VF_ERR_FRAMES);
        if (!(sc->flags & IS_VF))
                mtx_unlock(&sc->reg_lock);

#undef GET_STAT
}

static void
t4_clr_vi_stats(struct adapter *sc, u_int vin)
{
        int reg;

        t4_write_reg(sc, A_PL_INDIR_CMD, V_PL_AUTOINC(1) | V_PL_VFID(vin) |
            V_PL_ADDR(VF_MPS_REG(A_MPS_VF_STAT_TX_VF_BCAST_BYTES_L)));
        for (reg = A_MPS_VF_STAT_TX_VF_BCAST_BYTES_L;
             reg <= A_MPS_VF_STAT_RX_VF_ERR_FRAMES_H; reg += 4)
                t4_write_reg(sc, A_PL_INDIR_DATA, 0);
}

static void
vi_refresh_stats(struct vi_info *vi)
{
        struct timeval tv;
        const struct timeval interval = {0, 250000};    /* 250ms */

        mtx_assert(&vi->tick_mtx, MA_OWNED);

        if (!(vi->flags & VI_INIT_DONE) || vi->flags & VI_SKIP_STATS)
                return;

        getmicrotime(&tv);
        timevalsub(&tv, &interval);
        if (timevalcmp(&tv, &vi->last_refreshed, <))
                return;

        t4_get_vi_stats(vi->adapter, vi->vin, &vi->stats);
        getmicrotime(&vi->last_refreshed);
}

static void
cxgbe_refresh_stats(struct vi_info *vi)
{
        u_int i, v, tnl_cong_drops, chan_map;
        struct timeval tv;
        const struct timeval interval = {0, 250000};    /* 250ms */
        struct port_info *pi;
        struct adapter *sc;

        mtx_assert(&vi->tick_mtx, MA_OWNED);

        if (vi->flags & VI_SKIP_STATS)
                return;

        getmicrotime(&tv);
        timevalsub(&tv, &interval);
        if (timevalcmp(&tv, &vi->last_refreshed, <))
                return;

        pi = vi->pi;
        sc = vi->adapter;
        tnl_cong_drops = 0;
        t4_get_port_stats(sc, pi->port_id, &pi->stats);
        chan_map = pi->rx_e_chan_map;
        while (chan_map) {
                i = ffs(chan_map) - 1;
                mtx_lock(&sc->reg_lock);
                t4_read_indirect(sc, A_TP_MIB_INDEX, A_TP_MIB_DATA, &v, 1,
                    A_TP_MIB_TNL_CNG_DROP_0 + i);
                mtx_unlock(&sc->reg_lock);
                tnl_cong_drops += v;
                chan_map &= ~(1 << i);
        }
        pi->tnl_cong_drops = tnl_cong_drops;
        getmicrotime(&vi->last_refreshed);
}

static void
cxgbe_tick(void *arg)
{
        struct vi_info *vi = arg;

        MPASS(IS_MAIN_VI(vi));
        mtx_assert(&vi->tick_mtx, MA_OWNED);

        cxgbe_refresh_stats(vi);
        callout_schedule(&vi->tick, hz);
}

static void
vi_tick(void *arg)
{
        struct vi_info *vi = arg;

        mtx_assert(&vi->tick_mtx, MA_OWNED);

        vi_refresh_stats(vi);
        callout_schedule(&vi->tick, hz);
}

/*
 * Should match fw_caps_config_<foo> enums in t4fw_interface.h
 */
static char *caps_decoder[] = {
        "\20\001IPMI\002NCSI",                          /* 0: NBM */
        "\20\001PPP\002QFC\003DCBX",                    /* 1: link */
        "\20\001INGRESS\002EGRESS",                     /* 2: switch */
        "\20\001NIC\002VM\003IDS\004UM\005UM_ISGL"      /* 3: NIC */
            "\006HASHFILTER\007ETHOFLD",
        "\20\001TOE",                                   /* 4: TOE */
        "\20\001RDDP\002RDMAC",                         /* 5: RDMA */
        "\20\001INITIATOR_PDU\002TARGET_PDU"            /* 6: iSCSI */
            "\003INITIATOR_CNXOFLD\004TARGET_CNXOFLD"
            "\005INITIATOR_SSNOFLD\006TARGET_SSNOFLD"
            "\007T10DIF"
            "\010INITIATOR_CMDOFLD\011TARGET_CMDOFLD",
        "\20\001LOOKASIDE\002TLSKEYS\003IPSEC_INLINE"   /* 7: Crypto */
            "\004TLS_HW",
        "\20\001INITIATOR\002TARGET\003CTRL_OFLD"       /* 8: FCoE */
                    "\004PO_INITIATOR\005PO_TARGET",
};

void
t4_sysctls(struct adapter *sc)
{
        struct sysctl_ctx_list *ctx;
        struct sysctl_oid *oid;
        struct sysctl_oid_list *children, *c0;
        static char *doorbells = {"\20\1UDB\2WCWR\3UDBWC\4KDB"};

        ctx = device_get_sysctl_ctx(sc->dev);

        /*
         * dev.t4nex.X.
         */
        oid = device_get_sysctl_tree(sc->dev);
        c0 = children = SYSCTL_CHILDREN(oid);

        sc->sc_do_rxcopy = 1;
        SYSCTL_ADD_INT(ctx, children, OID_AUTO, "do_rx_copy", CTLFLAG_RW,
            &sc->sc_do_rxcopy, 1, "Do RX copy of small frames");

        SYSCTL_ADD_INT(ctx, children, OID_AUTO, "nports", CTLFLAG_RD, NULL,
            sc->params.nports, "# of ports");

        SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "doorbells",
            CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, doorbells,
            (uintptr_t)&sc->doorbells, sysctl_bitfield_8b, "A",
            "available doorbells");

        SYSCTL_ADD_INT(ctx, children, OID_AUTO, "core_clock", CTLFLAG_RD, NULL,
            sc->params.vpd.cclk, "core clock frequency (in KHz)");

        SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "holdoff_timers",
            CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE,
            sc->params.sge.timer_val, sizeof(sc->params.sge.timer_val),
            sysctl_int_array, "A", "interrupt holdoff timer values (us)");

        SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "holdoff_pkt_counts",
            CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE,
            sc->params.sge.counter_val, sizeof(sc->params.sge.counter_val),
            sysctl_int_array, "A", "interrupt holdoff packet counter values");

        t4_sge_sysctls(sc, ctx, children);

        sc->lro_timeout = 100;
        SYSCTL_ADD_INT(ctx, children, OID_AUTO, "lro_timeout", CTLFLAG_RW,
            &sc->lro_timeout, 0, "lro inactive-flush timeout (in us)");

        SYSCTL_ADD_INT(ctx, children, OID_AUTO, "dflags", CTLFLAG_RW,
            &sc->debug_flags, 0, "flags to enable runtime debugging");

        SYSCTL_ADD_STRING(ctx, children, OID_AUTO, "tp_version",
            CTLFLAG_RD, sc->tp_version, 0, "TP microcode version");

        SYSCTL_ADD_STRING(ctx, children, OID_AUTO, "firmware_version",
            CTLFLAG_RD, sc->fw_version, 0, "firmware version");

        if (sc->flags & IS_VF)
                return;

        SYSCTL_ADD_INT(ctx, children, OID_AUTO, "hw_revision", CTLFLAG_RD,
            NULL, chip_rev(sc), "chip hardware revision");

        SYSCTL_ADD_STRING(ctx, children, OID_AUTO, "sn",
            CTLFLAG_RD, sc->params.vpd.sn, 0, "serial number");

        SYSCTL_ADD_STRING(ctx, children, OID_AUTO, "pn",
            CTLFLAG_RD, sc->params.vpd.pn, 0, "part number");

        SYSCTL_ADD_STRING(ctx, children, OID_AUTO, "ec",
            CTLFLAG_RD, sc->params.vpd.ec, 0, "engineering change");

        SYSCTL_ADD_STRING(ctx, children, OID_AUTO, "md_version",
            CTLFLAG_RD, sc->params.vpd.md, 0, "manufacturing diags version");

        SYSCTL_ADD_STRING(ctx, children, OID_AUTO, "na",
            CTLFLAG_RD, sc->params.vpd.na, 0, "network address");

        SYSCTL_ADD_STRING(ctx, children, OID_AUTO, "er_version", CTLFLAG_RD,
            sc->er_version, 0, "expansion ROM version");

        SYSCTL_ADD_STRING(ctx, children, OID_AUTO, "bs_version", CTLFLAG_RD,
            sc->bs_version, 0, "bootstrap firmware version");

        SYSCTL_ADD_UINT(ctx, children, OID_AUTO, "scfg_version", CTLFLAG_RD,
            NULL, sc->params.scfg_vers, "serial config version");

        SYSCTL_ADD_UINT(ctx, children, OID_AUTO, "vpd_version", CTLFLAG_RD,
            NULL, sc->params.vpd_vers, "VPD version");

        SYSCTL_ADD_STRING(ctx, children, OID_AUTO, "cf",
            CTLFLAG_RD, sc->cfg_file, 0, "configuration file");

        SYSCTL_ADD_UINT(ctx, children, OID_AUTO, "cfcsum", CTLFLAG_RD, NULL,
            sc->cfcsum, "config file checksum");

#define SYSCTL_CAP(name, n, text) \
        SYSCTL_ADD_PROC(ctx, children, OID_AUTO, #name, \
            CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, caps_decoder[n], \
            (uintptr_t)&sc->name, sysctl_bitfield_16b, "A", \
            "available " text " capabilities")

        SYSCTL_CAP(nbmcaps, 0, "NBM");
        SYSCTL_CAP(linkcaps, 1, "link");
        SYSCTL_CAP(switchcaps, 2, "switch");
        SYSCTL_CAP(niccaps, 3, "NIC");
        SYSCTL_CAP(toecaps, 4, "TCP offload");
        SYSCTL_CAP(rdmacaps, 5, "RDMA");
        SYSCTL_CAP(iscsicaps, 6, "iSCSI");
        SYSCTL_CAP(cryptocaps, 7, "crypto");
        SYSCTL_CAP(fcoecaps, 8, "FCoE");
#undef SYSCTL_CAP

        SYSCTL_ADD_INT(ctx, children, OID_AUTO, "nfilters", CTLFLAG_RD,
            NULL, sc->tids.nftids, "number of filters");

        SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "temperature",
            CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_MPSAFE, sc, 0,
            sysctl_temperature, "I", "chip temperature (in Celsius)");
        SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "reset_sensor",
            CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, sc, 0,
            sysctl_reset_sensor, "I", "reset the chip's temperature sensor.");

        SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "loadavg",
            CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, sc, 0,
            sysctl_loadavg, "A",
            "microprocessor load averages (debug firmwares only)");

        SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "core_vdd",
            CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_MPSAFE, sc, 0, sysctl_vdd,
            "I", "core Vdd (in mV)");

        SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "local_cpus",
            CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, sc, LOCAL_CPUS,
            sysctl_cpus, "A", "local CPUs");

        SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "intr_cpus",
            CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, sc, INTR_CPUS,
            sysctl_cpus, "A", "preferred CPUs for interrupts");

        SYSCTL_ADD_INT(ctx, children, OID_AUTO, "swintr", CTLFLAG_RW,
            &sc->swintr, 0, "software triggered interrupts");

        SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "reset",
            CTLTYPE_INT | CTLFLAG_RW, sc, 0, sysctl_reset, "I",
            "1 = reset adapter, 0 = zero reset counter");

        /*
         * dev.t4nex.X.misc.  Marked CTLFLAG_SKIP to avoid information overload.
         */
        oid = SYSCTL_ADD_NODE(ctx, c0, OID_AUTO, "misc",
            CTLFLAG_RD | CTLFLAG_SKIP | CTLFLAG_MPSAFE, NULL,
            "logs and miscellaneous information");
        children = SYSCTL_CHILDREN(oid);

        SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "cctrl",
            CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, sc, 0,
            sysctl_cctrl, "A", "congestion control");

        SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "cim_ibq_tp0",
            CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, sc, 0,
            sysctl_cim_ibq_obq, "A", "CIM IBQ 0 (TP0)");

        SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "cim_ibq_tp1",
            CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, sc, 1,
            sysctl_cim_ibq_obq, "A", "CIM IBQ 1 (TP1)");

        SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "cim_ibq_ulp",
            CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, sc, 2,
            sysctl_cim_ibq_obq, "A", "CIM IBQ 2 (ULP)");

        SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "cim_ibq_sge0",
            CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, sc, 3,
            sysctl_cim_ibq_obq, "A", "CIM IBQ 3 (SGE0)");

        SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "cim_ibq_sge1",
            CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, sc, 4,
            sysctl_cim_ibq_obq, "A", "CIM IBQ 4 (SGE1)");

        SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "cim_ibq_ncsi",
            CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, sc, 5,
            sysctl_cim_ibq_obq, "A", "CIM IBQ 5 (NCSI)");

        SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "cim_la",
            CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, sc, 0,
            sysctl_cim_la, "A", "CIM logic analyzer");

        SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "cim_ma_la",
            CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, sc, 0,
            sysctl_cim_ma_la, "A", "CIM MA logic analyzer");

        SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "cim_obq_ulp0",
            CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, sc,
            0 + CIM_NUM_IBQ, sysctl_cim_ibq_obq, "A", "CIM OBQ 0 (ULP0)");

        SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "cim_obq_ulp1",
            CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, sc,
            1 + CIM_NUM_IBQ, sysctl_cim_ibq_obq, "A", "CIM OBQ 1 (ULP1)");

        SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "cim_obq_ulp2",
            CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, sc,
            2 + CIM_NUM_IBQ, sysctl_cim_ibq_obq, "A", "CIM OBQ 2 (ULP2)");

        SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "cim_obq_ulp3",
            CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, sc,
            3 + CIM_NUM_IBQ, sysctl_cim_ibq_obq, "A", "CIM OBQ 3 (ULP3)");

        SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "cim_obq_sge",
            CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, sc,
            4 + CIM_NUM_IBQ, sysctl_cim_ibq_obq, "A", "CIM OBQ 4 (SGE)");

        SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "cim_obq_ncsi",
            CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, sc,
            5 + CIM_NUM_IBQ, sysctl_cim_ibq_obq, "A", "CIM OBQ 5 (NCSI)");

        if (chip_id(sc) > CHELSIO_T4) {
                SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "cim_obq_sge0_rx",
                    CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, sc,
                    6 + CIM_NUM_IBQ, sysctl_cim_ibq_obq, "A",
                    "CIM OBQ 6 (SGE0-RX)");

                SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "cim_obq_sge1_rx",
                    CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, sc,
                    7 + CIM_NUM_IBQ, sysctl_cim_ibq_obq, "A",
                    "CIM OBQ 7 (SGE1-RX)");
        }

        SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "cim_pif_la",
            CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, sc, 0,
            sysctl_cim_pif_la, "A", "CIM PIF logic analyzer");

        SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "cim_qcfg",
            CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, sc, 0,
            sysctl_cim_qcfg, "A", "CIM queue configuration");

        SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "cpl_stats",
            CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, sc, 0,
            sysctl_cpl_stats, "A", "CPL statistics");

        SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "ddp_stats",
            CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, sc, 0,
            sysctl_ddp_stats, "A", "non-TCP DDP statistics");

        SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "tid_stats",
            CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, sc, 0,
            sysctl_tid_stats, "A", "tid stats");

        SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "devlog",
            CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, sc, 0,
            sysctl_devlog, "A", "firmware's device log");

        SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "fcoe_stats",
            CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, sc, 0,
            sysctl_fcoe_stats, "A", "FCoE statistics");

        SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "hw_sched",
            CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, sc, 0,
            sysctl_hw_sched, "A", "hardware scheduler ");

        SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "l2t",
            CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, sc, 0,
            sysctl_l2t, "A", "hardware L2 table");

        SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "smt",
            CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, sc, 0,
            sysctl_smt, "A", "hardware source MAC table");

#ifdef INET6
        SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "clip",
            CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, sc, 0,
            sysctl_clip, "A", "active CLIP table entries");
#endif

        SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "lb_stats",
            CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, sc, 0,
            sysctl_lb_stats, "A", "loopback statistics");

        SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "meminfo",
            CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, sc, 0,
            sysctl_meminfo, "A", "memory regions");

        SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "mps_tcam",
            CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, sc, 0,
            chip_id(sc) <= CHELSIO_T5 ? sysctl_mps_tcam : sysctl_mps_tcam_t6,
            "A", "MPS TCAM entries");

        SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "path_mtus",
            CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, sc, 0,
            sysctl_path_mtus, "A", "path MTUs");

        SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "pm_stats",
            CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, sc, 0,
            sysctl_pm_stats, "A", "PM statistics");

        SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "rdma_stats",
            CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, sc, 0,
            sysctl_rdma_stats, "A", "RDMA statistics");

        SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "tcp_stats",
            CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, sc, 0,
            sysctl_tcp_stats, "A", "TCP statistics");

        SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "tids",
            CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, sc, 0,
            sysctl_tids, "A", "TID information");

        SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "tp_err_stats",
            CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, sc, 0,
            sysctl_tp_err_stats, "A", "TP error statistics");

        SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "tnl_stats",
            CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, sc, 0,
            sysctl_tnl_stats, "A", "TP tunnel statistics");

        SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "tp_la_mask",
            CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, sc, 0,
            sysctl_tp_la_mask, "I", "TP logic analyzer event capture mask");

        SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "tp_la",
            CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, sc, 0,
            sysctl_tp_la, "A", "TP logic analyzer");

        SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "tx_rate",
            CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, sc, 0,
            sysctl_tx_rate, "A", "Tx rate");

        SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "ulprx_la",
            CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, sc, 0,
            sysctl_ulprx_la, "A", "ULPRX logic analyzer");

        if (chip_id(sc) >= CHELSIO_T5) {
                SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "wcwr_stats",
                    CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, sc, 0,
                    sysctl_wcwr_stats, "A", "write combined work requests");
        }

#ifdef KERN_TLS
        if (is_ktls(sc)) {
                /*
                 * dev.t4nex.0.tls.
                 */
                oid = SYSCTL_ADD_NODE(ctx, c0, OID_AUTO, "tls",
                    CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, "KERN_TLS parameters");
                children = SYSCTL_CHILDREN(oid);

                SYSCTL_ADD_INT(ctx, children, OID_AUTO, "inline_keys",
                    CTLFLAG_RW, &sc->tlst.inline_keys, 0, "Always pass TLS "
                    "keys in work requests (1) or attempt to store TLS keys "
                    "in card memory.");
                SYSCTL_ADD_INT(ctx, children, OID_AUTO, "combo_wrs",
                    CTLFLAG_RW, &sc->tlst.combo_wrs, 0, "Attempt to combine "
                    "TCB field updates with TLS record work requests.");
        }
#endif

#ifdef TCP_OFFLOAD
        if (is_offload(sc)) {
                int i;
                char s[4];

                /*
                 * dev.t4nex.X.toe.
                 */
                oid = SYSCTL_ADD_NODE(ctx, c0, OID_AUTO, "toe",
                    CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, "TOE parameters");
                children = SYSCTL_CHILDREN(oid);

                sc->tt.cong_algorithm = -1;
                SYSCTL_ADD_INT(ctx, children, OID_AUTO, "cong_algorithm",
                    CTLFLAG_RW, &sc->tt.cong_algorithm, 0, "congestion control "
                    "(-1 = default, 0 = reno, 1 = tahoe, 2 = newreno, "
                    "3 = highspeed)");

                sc->tt.sndbuf = -1;
                SYSCTL_ADD_INT(ctx, children, OID_AUTO, "sndbuf", CTLFLAG_RW,
                    &sc->tt.sndbuf, 0, "hardware send buffer");

                sc->tt.ddp = 0;
                SYSCTL_ADD_INT(ctx, children, OID_AUTO, "ddp",
                    CTLFLAG_RW | CTLFLAG_SKIP, &sc->tt.ddp, 0, "");
                SYSCTL_ADD_INT(ctx, children, OID_AUTO, "rx_zcopy", CTLFLAG_RW,
                    &sc->tt.ddp, 0, "Enable zero-copy aio_read(2)");

                sc->tt.rx_coalesce = -1;
                SYSCTL_ADD_INT(ctx, children, OID_AUTO, "rx_coalesce",
                    CTLFLAG_RW, &sc->tt.rx_coalesce, 0, "receive coalescing");

                sc->tt.tls = 0;
                SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "tls", CTLTYPE_INT |
                    CTLFLAG_RW | CTLFLAG_MPSAFE, sc, 0, sysctl_tls, "I",
                    "Inline TLS allowed");

                SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "tls_rx_ports",
                    CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, sc, 0,
                    sysctl_tls_rx_ports, "I",
                    "TCP ports that use inline TLS+TOE RX");

                sc->tt.tls_rx_timeout = t4_toe_tls_rx_timeout;
                SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "tls_rx_timeout",
                    CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, sc, 0,
                    sysctl_tls_rx_timeout, "I",
                    "Timeout in seconds to downgrade TLS sockets to plain TOE");

                sc->tt.tx_align = -1;
                SYSCTL_ADD_INT(ctx, children, OID_AUTO, "tx_align",
                    CTLFLAG_RW, &sc->tt.tx_align, 0, "chop and align payload");

                sc->tt.tx_zcopy = 0;
                SYSCTL_ADD_INT(ctx, children, OID_AUTO, "tx_zcopy",
                    CTLFLAG_RW, &sc->tt.tx_zcopy, 0,
                    "Enable zero-copy aio_write(2)");

                sc->tt.cop_managed_offloading = !!t4_cop_managed_offloading;
                SYSCTL_ADD_INT(ctx, children, OID_AUTO,
                    "cop_managed_offloading", CTLFLAG_RW,
                    &sc->tt.cop_managed_offloading, 0,
                    "COP (Connection Offload Policy) controls all TOE offload");

                sc->tt.autorcvbuf_inc = 16 * 1024;
                SYSCTL_ADD_INT(ctx, children, OID_AUTO, "autorcvbuf_inc",
                    CTLFLAG_RW, &sc->tt.autorcvbuf_inc, 0,
                    "autorcvbuf increment");

                sc->tt.update_hc_on_pmtu_change = 1;
                SYSCTL_ADD_INT(ctx, children, OID_AUTO,
                    "update_hc_on_pmtu_change", CTLFLAG_RW,
                    &sc->tt.update_hc_on_pmtu_change, 0,
                    "Update hostcache entry if the PMTU changes");

                sc->tt.iso = 1;
                SYSCTL_ADD_INT(ctx, children, OID_AUTO, "iso", CTLFLAG_RW,
                    &sc->tt.iso, 0, "Enable iSCSI segmentation offload");

                SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "timer_tick",
                    CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, sc, 0,
                    sysctl_tp_tick, "A", "TP timer tick (us)");

                SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "timestamp_tick",
                    CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, sc, 1,
                    sysctl_tp_tick, "A", "TCP timestamp tick (us)");

                SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "dack_tick",
                    CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, sc, 2,
                    sysctl_tp_tick, "A", "DACK tick (us)");

                SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "dack_timer",
                    CTLTYPE_UINT | CTLFLAG_RD | CTLFLAG_MPSAFE, sc, 0,
                    sysctl_tp_dack_timer, "IU", "DACK timer (us)");

                SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "rexmt_min",
                    CTLTYPE_ULONG | CTLFLAG_RD | CTLFLAG_MPSAFE, sc,
                    A_TP_RXT_MIN, sysctl_tp_timer, "LU",
                    "Minimum retransmit interval (us)");

                SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "rexmt_max",
                    CTLTYPE_ULONG | CTLFLAG_RD | CTLFLAG_MPSAFE, sc,
                    A_TP_RXT_MAX, sysctl_tp_timer, "LU",
                    "Maximum retransmit interval (us)");

                SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "persist_min",
                    CTLTYPE_ULONG | CTLFLAG_RD | CTLFLAG_MPSAFE, sc,
                    A_TP_PERS_MIN, sysctl_tp_timer, "LU",
                    "Persist timer min (us)");

                SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "persist_max",
                    CTLTYPE_ULONG | CTLFLAG_RD | CTLFLAG_MPSAFE, sc,
                    A_TP_PERS_MAX, sysctl_tp_timer, "LU",
                    "Persist timer max (us)");

                SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "keepalive_idle",
                    CTLTYPE_ULONG | CTLFLAG_RD | CTLFLAG_MPSAFE, sc,
                    A_TP_KEEP_IDLE, sysctl_tp_timer, "LU",
                    "Keepalive idle timer (us)");

                SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "keepalive_interval",
                    CTLTYPE_ULONG | CTLFLAG_RD | CTLFLAG_MPSAFE, sc,
                    A_TP_KEEP_INTVL, sysctl_tp_timer, "LU",
                    "Keepalive interval timer (us)");

                SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "initial_srtt",
                    CTLTYPE_ULONG | CTLFLAG_RD | CTLFLAG_MPSAFE, sc,
                    A_TP_INIT_SRTT, sysctl_tp_timer, "LU", "Initial SRTT (us)");

                SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "finwait2_timer",
                    CTLTYPE_ULONG | CTLFLAG_RD | CTLFLAG_MPSAFE, sc,
                    A_TP_FINWAIT2_TIMER, sysctl_tp_timer, "LU",
                    "FINWAIT2 timer (us)");

                SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "syn_rexmt_count",
                    CTLTYPE_UINT | CTLFLAG_RD | CTLFLAG_MPSAFE, sc,
                    S_SYNSHIFTMAX, sysctl_tp_shift_cnt, "IU",
                    "Number of SYN retransmissions before abort");

                SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "rexmt_count",
                    CTLTYPE_UINT | CTLFLAG_RD | CTLFLAG_MPSAFE, sc,
                    S_RXTSHIFTMAXR2, sysctl_tp_shift_cnt, "IU",
                    "Number of retransmissions before abort");

                SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "keepalive_count",
                    CTLTYPE_UINT | CTLFLAG_RD | CTLFLAG_MPSAFE, sc,
                    S_KEEPALIVEMAXR2, sysctl_tp_shift_cnt, "IU",
                    "Number of keepalive probes before abort");

                oid = SYSCTL_ADD_NODE(ctx, children, OID_AUTO, "rexmt_backoff",
                    CTLFLAG_RD | CTLFLAG_MPSAFE, NULL,
                    "TOE retransmit backoffs");
                children = SYSCTL_CHILDREN(oid);
                for (i = 0; i < 16; i++) {
                        snprintf(s, sizeof(s), "%u", i);
                        SYSCTL_ADD_PROC(ctx, children, OID_AUTO, s,
                            CTLTYPE_UINT | CTLFLAG_RD | CTLFLAG_MPSAFE, sc,
                            i, sysctl_tp_backoff, "IU",
                            "TOE retransmit backoff");
                }
        }
#endif
}

void
vi_sysctls(struct vi_info *vi)
{
        struct sysctl_ctx_list *ctx;
        struct sysctl_oid *oid;
        struct sysctl_oid_list *children;

        ctx = device_get_sysctl_ctx(vi->dev);

        /*
         * dev.v?(cxgbe|cxl).X.
         */
        oid = device_get_sysctl_tree(vi->dev);
        children = SYSCTL_CHILDREN(oid);

        SYSCTL_ADD_UINT(ctx, children, OID_AUTO, "viid", CTLFLAG_RD, NULL,
            vi->viid, "VI identifer");
        SYSCTL_ADD_INT(ctx, children, OID_AUTO, "nrxq", CTLFLAG_RD,
            &vi->nrxq, 0, "# of rx queues");
        SYSCTL_ADD_INT(ctx, children, OID_AUTO, "ntxq", CTLFLAG_RD,
            &vi->ntxq, 0, "# of tx queues");
        SYSCTL_ADD_INT(ctx, children, OID_AUTO, "first_rxq", CTLFLAG_RD,
            &vi->first_rxq, 0, "index of first rx queue");
        SYSCTL_ADD_INT(ctx, children, OID_AUTO, "first_txq", CTLFLAG_RD,
            &vi->first_txq, 0, "index of first tx queue");
        SYSCTL_ADD_UINT(ctx, children, OID_AUTO, "rss_base", CTLFLAG_RD, NULL,
            vi->rss_base, "start of RSS indirection table");
        SYSCTL_ADD_UINT(ctx, children, OID_AUTO, "rss_size", CTLFLAG_RD, NULL,
            vi->rss_size, "size of RSS indirection table");

        if (IS_MAIN_VI(vi)) {
                SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "rsrv_noflowq",
                    CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, vi, 0,
                    sysctl_noflowq, "IU",
                    "Reserve queue 0 for non-flowid packets");
        }

        if (vi->adapter->flags & IS_VF) {
                MPASS(vi->flags & TX_USES_VM_WR);
                SYSCTL_ADD_UINT(ctx, children, OID_AUTO, "tx_vm_wr", CTLFLAG_RD,
                    NULL, 1, "use VM work requests for transmit");
        } else {
                SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "tx_vm_wr",
                    CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, vi, 0,
                    sysctl_tx_vm_wr, "I", "use VM work requestes for transmit");
        }

#ifdef TCP_OFFLOAD
        if (vi->nofldrxq != 0) {
                SYSCTL_ADD_INT(ctx, children, OID_AUTO, "nofldrxq", CTLFLAG_RD,
                    &vi->nofldrxq, 0,
                    "# of rx queues for offloaded TCP connections");
                SYSCTL_ADD_INT(ctx, children, OID_AUTO, "first_ofld_rxq",
                    CTLFLAG_RD, &vi->first_ofld_rxq, 0,
                    "index of first TOE rx queue");
                SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "holdoff_tmr_idx_ofld",
                    CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, vi, 0,
                    sysctl_holdoff_tmr_idx_ofld, "I",
                    "holdoff timer index for TOE queues");
                SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "holdoff_pktc_idx_ofld",
                    CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, vi, 0,
                    sysctl_holdoff_pktc_idx_ofld, "I",
                    "holdoff packet counter index for TOE queues");
        }
#endif
#if defined(TCP_OFFLOAD) || defined(RATELIMIT)
        if (vi->nofldtxq != 0) {
                SYSCTL_ADD_INT(ctx, children, OID_AUTO, "nofldtxq", CTLFLAG_RD,
                    &vi->nofldtxq, 0,
                    "# of tx queues for TOE/ETHOFLD");
                SYSCTL_ADD_INT(ctx, children, OID_AUTO, "first_ofld_txq",
                    CTLFLAG_RD, &vi->first_ofld_txq, 0,
                    "index of first TOE/ETHOFLD tx queue");
        }
#endif
#ifdef DEV_NETMAP
        if (vi->nnmrxq != 0) {
                SYSCTL_ADD_INT(ctx, children, OID_AUTO, "nnmrxq", CTLFLAG_RD,
                    &vi->nnmrxq, 0, "# of netmap rx queues");
                SYSCTL_ADD_INT(ctx, children, OID_AUTO, "nnmtxq", CTLFLAG_RD,
                    &vi->nnmtxq, 0, "# of netmap tx queues");
                SYSCTL_ADD_INT(ctx, children, OID_AUTO, "first_nm_rxq",
                    CTLFLAG_RD, &vi->first_nm_rxq, 0,
                    "index of first netmap rx queue");
                SYSCTL_ADD_INT(ctx, children, OID_AUTO, "first_nm_txq",
                    CTLFLAG_RD, &vi->first_nm_txq, 0,
                    "index of first netmap tx queue");
        }
#endif

        SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "holdoff_tmr_idx",
            CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, vi, 0,
            sysctl_holdoff_tmr_idx, "I", "holdoff timer index");
        SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "holdoff_pktc_idx",
            CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, vi, 0,
            sysctl_holdoff_pktc_idx, "I", "holdoff packet counter index");

        SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "qsize_rxq",
            CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, vi, 0,
            sysctl_qsize_rxq, "I", "rx queue size");
        SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "qsize_txq",
            CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, vi, 0,
            sysctl_qsize_txq, "I", "tx queue size");
}

static void
cxgbe_sysctls(struct port_info *pi)
{
        struct sysctl_ctx_list *ctx;
        struct sysctl_oid *oid;
        struct sysctl_oid_list *children, *children2;
        struct adapter *sc = pi->adapter;
        int i;
        char name[16];
        static char *tc_flags = {"\20\1USER"};

        ctx = device_get_sysctl_ctx(pi->dev);

        /*
         * dev.cxgbe.X.
         */
        oid = device_get_sysctl_tree(pi->dev);
        children = SYSCTL_CHILDREN(oid);

        SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "linkdnrc",
            CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, pi, 0,
            sysctl_linkdnrc, "A", "reason why link is down");
        if (pi->port_type == FW_PORT_TYPE_BT_XAUI) {
                SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "temperature",
                    CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_MPSAFE, pi, 0,
                    sysctl_btphy, "I", "PHY temperature (in Celsius)");
                SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "fw_version",
                    CTLTYPE_INT | CTLFLAG_RD | CTLFLAG_MPSAFE, pi, 1,
                    sysctl_btphy, "I", "PHY firmware version");
        }

        SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "pause_settings",
            CTLTYPE_STRING | CTLFLAG_RW | CTLFLAG_MPSAFE, pi, 0,
            sysctl_pause_settings, "A",
            "PAUSE settings (bit 0 = rx_pause, 1 = tx_pause, 2 = pause_autoneg)");
        SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "link_fec",
            CTLTYPE_STRING | CTLFLAG_MPSAFE, pi, 0, sysctl_link_fec, "A",
            "FEC in use on the link");
        SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "requested_fec",
            CTLTYPE_STRING | CTLFLAG_RW | CTLFLAG_MPSAFE, pi, 0,
            sysctl_requested_fec, "A",
            "FECs to use (bit 0 = RS, 1 = FC, 2 = none, 5 = auto, 6 = module)");
        SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "module_fec",
            CTLTYPE_STRING | CTLFLAG_MPSAFE, pi, 0, sysctl_module_fec, "A",
            "FEC recommended by the cable/transceiver");
        SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "autoneg",
            CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, pi, 0,
            sysctl_autoneg, "I",
            "autonegotiation (-1 = not supported)");
        SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "force_fec",
            CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, pi, 0,
            sysctl_force_fec, "I", "when to use FORCE_FEC bit for link config");

        SYSCTL_ADD_INT(ctx, children, OID_AUTO, "rcaps", CTLFLAG_RD,
            &pi->link_cfg.requested_caps, 0, "L1 config requested by driver");
        SYSCTL_ADD_INT(ctx, children, OID_AUTO, "pcaps", CTLFLAG_RD,
            &pi->link_cfg.pcaps, 0, "port capabilities");
        SYSCTL_ADD_INT(ctx, children, OID_AUTO, "acaps", CTLFLAG_RD,
            &pi->link_cfg.acaps, 0, "advertised capabilities");
        SYSCTL_ADD_INT(ctx, children, OID_AUTO, "lpacaps", CTLFLAG_RD,
            &pi->link_cfg.lpacaps, 0, "link partner advertised capabilities");

        SYSCTL_ADD_INT(ctx, children, OID_AUTO, "max_speed", CTLFLAG_RD, NULL,
            port_top_speed(pi), "max speed (in Gbps)");
        SYSCTL_ADD_INT(ctx, children, OID_AUTO, "mps_bg_map", CTLFLAG_RD, NULL,
            pi->mps_bg_map, "MPS buffer group map");
        SYSCTL_ADD_INT(ctx, children, OID_AUTO, "rx_e_chan_map", CTLFLAG_RD,
            NULL, pi->rx_e_chan_map, "TP rx e-channel map");
        SYSCTL_ADD_INT(ctx, children, OID_AUTO, "rx_c_chan", CTLFLAG_RD, NULL,
            pi->rx_c_chan, "TP rx c-channel");

        if (sc->flags & IS_VF)
                return;

        /*
         * dev.(cxgbe|cxl).X.tc.
         */
        oid = SYSCTL_ADD_NODE(ctx, children, OID_AUTO, "tc",
            CTLFLAG_RD | CTLFLAG_MPSAFE, NULL,
            "Tx scheduler traffic classes (cl_rl)");
        children2 = SYSCTL_CHILDREN(oid);
        SYSCTL_ADD_UINT(ctx, children2, OID_AUTO, "pktsize",
            CTLFLAG_RW, &pi->sched_params->pktsize, 0,
            "pktsize for per-flow cl-rl (0 means up to the driver )");
        SYSCTL_ADD_UINT(ctx, children2, OID_AUTO, "burstsize",
            CTLFLAG_RW, &pi->sched_params->burstsize, 0,
            "burstsize for per-flow cl-rl (0 means up to the driver)");
        for (i = 0; i < sc->params.nsched_cls; i++) {
                struct tx_cl_rl_params *tc = &pi->sched_params->cl_rl[i];

                snprintf(name, sizeof(name), "%d", i);
                children2 = SYSCTL_CHILDREN(SYSCTL_ADD_NODE(ctx,
                    SYSCTL_CHILDREN(oid), OID_AUTO, name,
                    CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, "traffic class"));
                SYSCTL_ADD_UINT(ctx, children2, OID_AUTO, "state",
                    CTLFLAG_RD, &tc->state, 0, "current state");
                SYSCTL_ADD_PROC(ctx, children2, OID_AUTO, "flags",
                    CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, tc_flags,
                    (uintptr_t)&tc->flags, sysctl_bitfield_8b, "A", "flags");
                SYSCTL_ADD_UINT(ctx, children2, OID_AUTO, "refcount",
                    CTLFLAG_RD, &tc->refcount, 0, "references to this class");
                SYSCTL_ADD_PROC(ctx, children2, OID_AUTO, "params",
                    CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_MPSAFE, sc,
                    (pi->port_id << 16) | i, sysctl_tc_params, "A",
                    "traffic class parameters");
        }

        /*
         * dev.cxgbe.X.stats.
         */
        oid = SYSCTL_ADD_NODE(ctx, children, OID_AUTO, "stats",
            CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, "port statistics");
        children = SYSCTL_CHILDREN(oid);
        SYSCTL_ADD_UINT(ctx, children, OID_AUTO, "tx_parse_error", CTLFLAG_RD,
            &pi->tx_parse_error, 0,
            "# of tx packets with invalid length or # of segments");

#define T4_REGSTAT(name, stat, desc) \
    SYSCTL_ADD_OID(ctx, children, OID_AUTO, #name, \
        CTLTYPE_U64 | CTLFLAG_RD | CTLFLAG_MPSAFE, sc, \
        (is_t4(sc) ? PORT_REG(pi->tx_chan, A_MPS_PORT_STAT_##stat##_L) : \
        T5_PORT_REG(pi->tx_chan, A_MPS_PORT_STAT_##stat##_L)), \
        sysctl_handle_t4_reg64, "QU", desc)

/* We get these from port_stats and they may be stale by up to 1s */
#define T4_PORTSTAT(name, desc) \
        SYSCTL_ADD_UQUAD(ctx, children, OID_AUTO, #name, CTLFLAG_RD, \
            &pi->stats.name, desc)

        T4_REGSTAT(tx_octets, TX_PORT_BYTES, "# of octets in good frames");
        T4_REGSTAT(tx_frames, TX_PORT_FRAMES, "total # of good frames");
        T4_REGSTAT(tx_bcast_frames, TX_PORT_BCAST, "# of broadcast frames");
        T4_REGSTAT(tx_mcast_frames, TX_PORT_MCAST, "# of multicast frames");
        T4_REGSTAT(tx_ucast_frames, TX_PORT_UCAST, "# of unicast frames");
        T4_REGSTAT(tx_error_frames, TX_PORT_ERROR, "# of error frames");
        T4_REGSTAT(tx_frames_64, TX_PORT_64B, "# of tx frames in this range");
        T4_REGSTAT(tx_frames_65_127, TX_PORT_65B_127B, "# of tx frames in this range");
        T4_REGSTAT(tx_frames_128_255, TX_PORT_128B_255B, "# of tx frames in this range");
        T4_REGSTAT(tx_frames_256_511, TX_PORT_256B_511B, "# of tx frames in this range");
        T4_REGSTAT(tx_frames_512_1023, TX_PORT_512B_1023B, "# of tx frames in this range");
        T4_REGSTAT(tx_frames_1024_1518, TX_PORT_1024B_1518B, "# of tx frames in this range");
        T4_REGSTAT(tx_frames_1519_max, TX_PORT_1519B_MAX, "# of tx frames in this range");
        T4_REGSTAT(tx_drop, TX_PORT_DROP, "# of dropped tx frames");
        T4_REGSTAT(tx_pause, TX_PORT_PAUSE, "# of pause frames transmitted");
        T4_REGSTAT(tx_ppp0, TX_PORT_PPP0, "# of PPP prio 0 frames transmitted");
        T4_REGSTAT(tx_ppp1, TX_PORT_PPP1, "# of PPP prio 1 frames transmitted");
        T4_REGSTAT(tx_ppp2, TX_PORT_PPP2, "# of PPP prio 2 frames transmitted");
        T4_REGSTAT(tx_ppp3, TX_PORT_PPP3, "# of PPP prio 3 frames transmitted");
        T4_REGSTAT(tx_ppp4, TX_PORT_PPP4, "# of PPP prio 4 frames transmitted");
        T4_REGSTAT(tx_ppp5, TX_PORT_PPP5, "# of PPP prio 5 frames transmitted");
        T4_REGSTAT(tx_ppp6, TX_PORT_PPP6, "# of PPP prio 6 frames transmitted");
        T4_REGSTAT(tx_ppp7, TX_PORT_PPP7, "# of PPP prio 7 frames transmitted");

        T4_REGSTAT(rx_octets, RX_PORT_BYTES, "# of octets in good frames");
        T4_REGSTAT(rx_frames, RX_PORT_FRAMES, "total # of good frames");
        T4_REGSTAT(rx_bcast_frames, RX_PORT_BCAST, "# of broadcast frames");
        T4_REGSTAT(rx_mcast_frames, RX_PORT_MCAST, "# of multicast frames");
        T4_REGSTAT(rx_ucast_frames, RX_PORT_UCAST, "# of unicast frames");
        T4_REGSTAT(rx_too_long, RX_PORT_MTU_ERROR, "# of frames exceeding MTU");
        T4_REGSTAT(rx_jabber, RX_PORT_MTU_CRC_ERROR, "# of jabber frames");
        if (is_t6(sc)) {
                T4_PORTSTAT(rx_fcs_err,
                    "# of frames received with bad FCS since last link up");
        } else {
                T4_REGSTAT(rx_fcs_err, RX_PORT_CRC_ERROR,
                    "# of frames received with bad FCS");
        }
        T4_REGSTAT(rx_len_err, RX_PORT_LEN_ERROR, "# of frames received with length error");
        T4_REGSTAT(rx_symbol_err, RX_PORT_SYM_ERROR, "symbol errors");
        T4_REGSTAT(rx_runt, RX_PORT_LESS_64B, "# of short frames received");
        T4_REGSTAT(rx_frames_64, RX_PORT_64B, "# of rx frames in this range");
        T4_REGSTAT(rx_frames_65_127, RX_PORT_65B_127B, "# of rx frames in this range");
        T4_REGSTAT(rx_frames_128_255, RX_PORT_128B_255B, "# of rx frames in this range");
        T4_REGSTAT(rx_frames_256_511, RX_PORT_256B_511B, "# of rx frames in this range");
        T4_REGSTAT(rx_frames_512_1023, RX_PORT_512B_1023B, "# of rx frames in this range");
        T4_REGSTAT(rx_frames_1024_1518, RX_PORT_1024B_1518B, "# of rx frames in this range");
        T4_REGSTAT(rx_frames_1519_max, RX_PORT_1519B_MAX, "# of rx frames in this range");
        T4_REGSTAT(rx_pause, RX_PORT_PAUSE, "# of pause frames received");
        T4_REGSTAT(rx_ppp0, RX_PORT_PPP0, "# of PPP prio 0 frames received");
        T4_REGSTAT(rx_ppp1, RX_PORT_PPP1, "# of PPP prio 1 frames received");
        T4_REGSTAT(rx_ppp2, RX_PORT_PPP2, "# of PPP prio 2 frames received");
        T4_REGSTAT(rx_ppp3, RX_PORT_PPP3, "# of PPP prio 3 frames received");
        T4_REGSTAT(rx_ppp4, RX_PORT_PPP4, "# of PPP prio 4 frames received");
        T4_REGSTAT(rx_ppp5, RX_PORT_PPP5, "# of PPP prio 5 frames received");
        T4_REGSTAT(rx_ppp6, RX_PORT_PPP6, "# of PPP prio 6 frames received");
        T4_REGSTAT(rx_ppp7, RX_PORT_PPP7, "# of PPP prio 7 frames received");

        T4_PORTSTAT(rx_ovflow0, "# drops due to buffer-group 0 overflows");
        T4_PORTSTAT(rx_ovflow1, "# drops due to buffer-group 1 overflows");
        T4_PORTSTAT(rx_ovflow2, "# drops due to buffer-group 2 overflows");
        T4_PORTSTAT(rx_ovflow3, "# drops due to buffer-group 3 overflows");
        T4_PORTSTAT(rx_trunc0, "# of buffer-group 0 truncated packets");
        T4_PORTSTAT(rx_trunc1, "# of buffer-group 1 truncated packets");
        T4_PORTSTAT(rx_trunc2, "# of buffer-group 2 truncated packets");
        T4_PORTSTAT(rx_trunc3, "# of buffer-group 3 truncated packets");

#undef T4_REGSTAT
#undef T4_PORTSTAT
}

static int
sysctl_int_array(SYSCTL_HANDLER_ARGS)
{
        int rc, *i, space = 0;
        struct sbuf sb;

        sbuf_new_for_sysctl(&sb, NULL, 64, req);
        for (i = arg1; arg2; arg2 -= sizeof(int), i++) {
                if (space)
                        sbuf_printf(&sb, " ");
                sbuf_printf(&sb, "%d", *i);
                space = 1;
        }
        rc = sbuf_finish(&sb);
        sbuf_delete(&sb);
        return (rc);
}

static int
sysctl_bitfield_8b(SYSCTL_HANDLER_ARGS)
{
        int rc;
        struct sbuf *sb;

        rc = sysctl_wire_old_buffer(req, 0);
        if (rc != 0)
                return(rc);

        sb = sbuf_new_for_sysctl(NULL, NULL, 128, req);
        if (sb == NULL)
                return (ENOMEM);

        sbuf_printf(sb, "%b", *(uint8_t *)(uintptr_t)arg2, (char *)arg1);
        rc = sbuf_finish(sb);
        sbuf_delete(sb);

        return (rc);
}

static int
sysctl_bitfield_16b(SYSCTL_HANDLER_ARGS)
{
        int rc;
        struct sbuf *sb;

        rc = sysctl_wire_old_buffer(req, 0);
        if (rc != 0)
                return(rc);

        sb = sbuf_new_for_sysctl(NULL, NULL, 128, req);
        if (sb == NULL)
                return (ENOMEM);

        sbuf_printf(sb, "%b", *(uint16_t *)(uintptr_t)arg2, (char *)arg1);
        rc = sbuf_finish(sb);
        sbuf_delete(sb);

        return (rc);
}

static int
sysctl_btphy(SYSCTL_HANDLER_ARGS)
{
        struct port_info *pi = arg1;
        int op = arg2;
        struct adapter *sc = pi->adapter;
        u_int v;
        int rc;

        rc = begin_synchronized_op(sc, &pi->vi[0], SLEEP_OK | INTR_OK, "t4btt");
        if (rc)
                return (rc);
        if (hw_off_limits(sc))
                rc = ENXIO;
        else {
                /* XXX: magic numbers */
                rc = -t4_mdio_rd(sc, sc->mbox, pi->mdio_addr, 0x1e,
                    op ? 0x20 : 0xc820, &v);
        }
        end_synchronized_op(sc, 0);
        if (rc)
                return (rc);
        if (op == 0)
                v /= 256;

        rc = sysctl_handle_int(oidp, &v, 0, req);
        return (rc);
}

static int
sysctl_noflowq(SYSCTL_HANDLER_ARGS)
{
        struct vi_info *vi = arg1;
        int rc, val;

        val = vi->rsrv_noflowq;
        rc = sysctl_handle_int(oidp, &val, 0, req);
        if (rc != 0 || req->newptr == NULL)
                return (rc);

        if ((val >= 1) && (vi->ntxq > 1))
                vi->rsrv_noflowq = 1;
        else
                vi->rsrv_noflowq = 0;

        return (rc);
}

static int
sysctl_tx_vm_wr(SYSCTL_HANDLER_ARGS)
{
        struct vi_info *vi = arg1;
        struct adapter *sc = vi->adapter;
        int rc, val, i;

        MPASS(!(sc->flags & IS_VF));

        val = vi->flags & TX_USES_VM_WR ? 1 : 0;
        rc = sysctl_handle_int(oidp, &val, 0, req);
        if (rc != 0 || req->newptr == NULL)
                return (rc);

        if (val != 0 && val != 1)
                return (EINVAL);

        rc = begin_synchronized_op(sc, vi, HOLD_LOCK | SLEEP_OK | INTR_OK,
            "t4txvm");
        if (rc)
                return (rc);
        if (hw_off_limits(sc))
                rc = ENXIO;
        else if (vi->ifp->if_drv_flags & IFF_DRV_RUNNING) {
                /*
                 * We don't want parse_pkt to run with one setting (VF or PF)
                 * and then eth_tx to see a different setting but still use
                 * stale information calculated by parse_pkt.
                 */
                rc = EBUSY;
        } else {
                struct port_info *pi = vi->pi;
                struct sge_txq *txq;
                uint32_t ctrl0;
                uint8_t npkt = sc->params.max_pkts_per_eth_tx_pkts_wr;

                if (val) {
                        vi->flags |= TX_USES_VM_WR;
                        vi->ifp->if_hw_tsomaxsegcount = TX_SGL_SEGS_VM_TSO;
                        ctrl0 = htobe32(V_TXPKT_OPCODE(CPL_TX_PKT_XT) |
                            V_TXPKT_INTF(pi->tx_chan));
                        if (!(sc->flags & IS_VF))
                                npkt--;
                } else {
                        vi->flags &= ~TX_USES_VM_WR;
                        vi->ifp->if_hw_tsomaxsegcount = TX_SGL_SEGS_TSO;
                        ctrl0 = htobe32(V_TXPKT_OPCODE(CPL_TX_PKT_XT) |
                            V_TXPKT_INTF(pi->tx_chan) | V_TXPKT_PF(sc->pf) |
                            V_TXPKT_VF(vi->vin) | V_TXPKT_VF_VLD(vi->vfvld));
                }
                for_each_txq(vi, i, txq) {
                        txq->cpl_ctrl0 = ctrl0;
                        txq->txp.max_npkt = npkt;
                }
        }
        end_synchronized_op(sc, LOCK_HELD);
        return (rc);
}

static int
sysctl_holdoff_tmr_idx(SYSCTL_HANDLER_ARGS)
{
        struct vi_info *vi = arg1;
        struct adapter *sc = vi->adapter;
        int idx, rc, i;
        struct sge_rxq *rxq;
        uint8_t v;

        idx = vi->tmr_idx;

        rc = sysctl_handle_int(oidp, &idx, 0, req);
        if (rc != 0 || req->newptr == NULL)
                return (rc);

        if (idx < 0 || idx >= SGE_NTIMERS)
                return (EINVAL);

        rc = begin_synchronized_op(sc, vi, HOLD_LOCK | SLEEP_OK | INTR_OK,
            "t4tmr");
        if (rc)
                return (rc);

        v = V_QINTR_TIMER_IDX(idx) | V_QINTR_CNT_EN(vi->pktc_idx != -1);
        for_each_rxq(vi, i, rxq) {
#ifdef atomic_store_rel_8
                atomic_store_rel_8(&rxq->iq.intr_params, v);
#else
                rxq->iq.intr_params = v;
#endif
        }
        vi->tmr_idx = idx;

        end_synchronized_op(sc, LOCK_HELD);
        return (0);
}

static int
sysctl_holdoff_pktc_idx(SYSCTL_HANDLER_ARGS)
{
        struct vi_info *vi = arg1;
        struct adapter *sc = vi->adapter;
        int idx, rc;

        idx = vi->pktc_idx;

        rc = sysctl_handle_int(oidp, &idx, 0, req);
        if (rc != 0 || req->newptr == NULL)
                return (rc);

        if (idx < -1 || idx >= SGE_NCOUNTERS)
                return (EINVAL);

        rc = begin_synchronized_op(sc, vi, HOLD_LOCK | SLEEP_OK | INTR_OK,
            "t4pktc");
        if (rc)
                return (rc);

        if (vi->flags & VI_INIT_DONE)
                rc = EBUSY; /* cannot be changed once the queues are created */
        else
                vi->pktc_idx = idx;

        end_synchronized_op(sc, LOCK_HELD);
        return (rc);
}

static int
sysctl_qsize_rxq(SYSCTL_HANDLER_ARGS)
{
        struct vi_info *vi = arg1;
        struct adapter *sc = vi->adapter;
        int qsize, rc;

        qsize = vi->qsize_rxq;

        rc = sysctl_handle_int(oidp, &qsize, 0, req);
        if (rc != 0 || req->newptr == NULL)
                return (rc);

        if (qsize < 128 || (qsize & 7))
                return (EINVAL);

        rc = begin_synchronized_op(sc, vi, HOLD_LOCK | SLEEP_OK | INTR_OK,
            "t4rxqs");
        if (rc)
                return (rc);

        if (vi->flags & VI_INIT_DONE)
                rc = EBUSY; /* cannot be changed once the queues are created */
        else
                vi->qsize_rxq = qsize;

        end_synchronized_op(sc, LOCK_HELD);
        return (rc);
}

static int
sysctl_qsize_txq(SYSCTL_HANDLER_ARGS)
{
        struct vi_info *vi = arg1;
        struct adapter *sc = vi->adapter;
        int qsize, rc;

        qsize = vi->qsize_txq;

        rc = sysctl_handle_int(oidp, &qsize, 0, req);
        if (rc != 0 || req->newptr == NULL)
                return (rc);

        if (qsize < 128 || qsize > 65536)
                return (EINVAL);

        rc = begin_synchronized_op(sc, vi, HOLD_LOCK | SLEEP_OK | INTR_OK,
            "t4txqs");
        if (rc)
                return (rc);

        if (vi->flags & VI_INIT_DONE)
                rc = EBUSY; /* cannot be changed once the queues are created */
        else
                vi->qsize_txq = qsize;

        end_synchronized_op(sc, LOCK_HELD);
        return (rc);
}

static int
sysctl_pause_settings(SYSCTL_HANDLER_ARGS)
{
        struct port_info *pi = arg1;
        struct adapter *sc = pi->adapter;
        struct link_config *lc = &pi->link_cfg;
        int rc;

        if (req->newptr == NULL) {
                struct sbuf *sb;
                static char *bits = "\20\1RX\2TX\3AUTO";

                rc = sysctl_wire_old_buffer(req, 0);
                if (rc != 0)
                        return(rc);

                sb = sbuf_new_for_sysctl(NULL, NULL, 128, req);
                if (sb == NULL)
                        return (ENOMEM);

                if (lc->link_ok) {
                        sbuf_printf(sb, "%b", (lc->fc & (PAUSE_TX | PAUSE_RX)) |
                            (lc->requested_fc & PAUSE_AUTONEG), bits);
                } else {
                        sbuf_printf(sb, "%b", lc->requested_fc & (PAUSE_TX |
                            PAUSE_RX | PAUSE_AUTONEG), bits);
                }
                rc = sbuf_finish(sb);
                sbuf_delete(sb);
        } else {
                char s[2];
                int n;

                s[0] = '0' + (lc->requested_fc & (PAUSE_TX | PAUSE_RX |
                    PAUSE_AUTONEG));
                s[1] = 0;

                rc = sysctl_handle_string(oidp, s, sizeof(s), req);
                if (rc != 0)
                        return(rc);

                if (s[1] != 0)
                        return (EINVAL);
                if (s[0] < '0' || s[0] > '9')
                        return (EINVAL);        /* not a number */
                n = s[0] - '0';
                if (n & ~(PAUSE_TX | PAUSE_RX | PAUSE_AUTONEG))
                        return (EINVAL);        /* some other bit is set too */

                rc = begin_synchronized_op(sc, &pi->vi[0], SLEEP_OK | INTR_OK,
                    "t4PAUSE");
                if (rc)
                        return (rc);
                if (!hw_off_limits(sc)) {
                        PORT_LOCK(pi);
                        lc->requested_fc = n;
                        fixup_link_config(pi);
                        if (pi->up_vis > 0)
                                rc = apply_link_config(pi);
                        set_current_media(pi);
                        PORT_UNLOCK(pi);
                }
                end_synchronized_op(sc, 0);
        }

        return (rc);
}

static int
sysctl_link_fec(SYSCTL_HANDLER_ARGS)
{
        struct port_info *pi = arg1;
        struct link_config *lc = &pi->link_cfg;
        int rc;
        struct sbuf *sb;
        static char *bits = "\20\1RS-FEC\2FC-FEC\3NO-FEC\4RSVD1\5RSVD2";

        rc = sysctl_wire_old_buffer(req, 0);
        if (rc != 0)
                return(rc);

        sb = sbuf_new_for_sysctl(NULL, NULL, 128, req);
        if (sb == NULL)
                return (ENOMEM);
        if (lc->link_ok)
                sbuf_printf(sb, "%b", lc->fec, bits);
        else
                sbuf_printf(sb, "no link");
        rc = sbuf_finish(sb);
        sbuf_delete(sb);

        return (rc);
}

static int
sysctl_requested_fec(SYSCTL_HANDLER_ARGS)
{
        struct port_info *pi = arg1;
        struct adapter *sc = pi->adapter;
        struct link_config *lc = &pi->link_cfg;
        int rc;
        int8_t old;

        if (req->newptr == NULL) {
                struct sbuf *sb;
                static char *bits = "\20\1RS-FEC\2FC-FEC\3NO-FEC\4RSVD2"
                    "\5RSVD3\6auto\7module";

                rc = sysctl_wire_old_buffer(req, 0);
                if (rc != 0)
                        return(rc);

                sb = sbuf_new_for_sysctl(NULL, NULL, 128, req);
                if (sb == NULL)
                        return (ENOMEM);

                sbuf_printf(sb, "%b", lc->requested_fec, bits);
                rc = sbuf_finish(sb);
                sbuf_delete(sb);
        } else {
                char s[8];
                int n;

                snprintf(s, sizeof(s), "%d",
                    lc->requested_fec == FEC_AUTO ? -1 :
                    lc->requested_fec & (M_FW_PORT_CAP32_FEC | FEC_MODULE));

                rc = sysctl_handle_string(oidp, s, sizeof(s), req);
                if (rc != 0)
                        return(rc);

                n = strtol(&s[0], NULL, 0);
                if (n < 0 || n & FEC_AUTO)
                        n = FEC_AUTO;
                else if (n & ~(M_FW_PORT_CAP32_FEC | FEC_MODULE))
                        return (EINVAL);/* some other bit is set too */

                rc = begin_synchronized_op(sc, &pi->vi[0], SLEEP_OK | INTR_OK,
                    "t4reqf");
                if (rc)
                        return (rc);
                PORT_LOCK(pi);
                old = lc->requested_fec;
                if (n == FEC_AUTO)
                        lc->requested_fec = FEC_AUTO;
                else if (n == 0 || n == FEC_NONE)
                        lc->requested_fec = FEC_NONE;
                else {
                        if ((lc->pcaps |
                            V_FW_PORT_CAP32_FEC(n & M_FW_PORT_CAP32_FEC)) !=
                            lc->pcaps) {
                                rc = ENOTSUP;
                                goto done;
                        }
                        lc->requested_fec = n & (M_FW_PORT_CAP32_FEC |
                            FEC_MODULE);
                }
                if (!hw_off_limits(sc)) {
                        fixup_link_config(pi);
                        if (pi->up_vis > 0) {
                                rc = apply_link_config(pi);
                                if (rc != 0) {
                                        lc->requested_fec = old;
                                        if (rc == FW_EPROTO)
                                                rc = ENOTSUP;
                                }
                        }
                }
done:
                PORT_UNLOCK(pi);
                end_synchronized_op(sc, 0);
        }

        return (rc);
}

static int
sysctl_module_fec(SYSCTL_HANDLER_ARGS)
{
        struct port_info *pi = arg1;
        struct adapter *sc = pi->adapter;
        struct link_config *lc = &pi->link_cfg;
        int rc;
        int8_t fec;
        struct sbuf *sb;
        static char *bits = "\20\1RS-FEC\2FC-FEC\3NO-FEC\4RSVD2\5RSVD3";

        rc = sysctl_wire_old_buffer(req, 0);
        if (rc != 0)
                return (rc);

        sb = sbuf_new_for_sysctl(NULL, NULL, 128, req);
        if (sb == NULL)
                return (ENOMEM);

        if (begin_synchronized_op(sc, NULL, SLEEP_OK | INTR_OK, "t4mfec") != 0) {
                rc = EBUSY;
                goto done;
        }
        if (hw_off_limits(sc)) {
                rc = ENXIO;
                goto done;
        }
        PORT_LOCK(pi);
        if (pi->up_vis == 0) {
                /*
                 * If all the interfaces are administratively down the firmware
                 * does not report transceiver changes.  Refresh port info here.
                 * This is the only reason we have a synchronized op in this
                 * function.  Just PORT_LOCK would have been enough otherwise.
                 */
                t4_update_port_info(pi);
        }

        fec = lc->fec_hint;
        if (pi->mod_type == FW_PORT_MOD_TYPE_NONE ||
            !fec_supported(lc->pcaps)) {
                sbuf_printf(sb, "n/a");
        } else {
                if (fec == 0)
                        fec = FEC_NONE;
                sbuf_printf(sb, "%b", fec & M_FW_PORT_CAP32_FEC, bits);
        }
        rc = sbuf_finish(sb);
        PORT_UNLOCK(pi);
done:
        sbuf_delete(sb);
        end_synchronized_op(sc, 0);

        return (rc);
}

static int
sysctl_autoneg(SYSCTL_HANDLER_ARGS)
{
        struct port_info *pi = arg1;
        struct adapter *sc = pi->adapter;
        struct link_config *lc = &pi->link_cfg;
        int rc, val;

        if (lc->pcaps & FW_PORT_CAP32_ANEG)
                val = lc->requested_aneg == AUTONEG_DISABLE ? 0 : 1;
        else
                val = -1;
        rc = sysctl_handle_int(oidp, &val, 0, req);
        if (rc != 0 || req->newptr == NULL)
                return (rc);
        if (val == 0)
                val = AUTONEG_DISABLE;
        else if (val == 1)
                val = AUTONEG_ENABLE;
        else
                val = AUTONEG_AUTO;

        rc = begin_synchronized_op(sc, &pi->vi[0], SLEEP_OK | INTR_OK,
            "t4aneg");
        if (rc)
                return (rc);
        PORT_LOCK(pi);
        if (val == AUTONEG_ENABLE && !(lc->pcaps & FW_PORT_CAP32_ANEG)) {
                rc = ENOTSUP;
                goto done;
        }
        lc->requested_aneg = val;
        if (!hw_off_limits(sc)) {
                fixup_link_config(pi);
                if (pi->up_vis > 0)
                        rc = apply_link_config(pi);
                set_current_media(pi);
        }
done:
        PORT_UNLOCK(pi);
        end_synchronized_op(sc, 0);
        return (rc);
}

static int
sysctl_force_fec(SYSCTL_HANDLER_ARGS)
{
        struct port_info *pi = arg1;
        struct adapter *sc = pi->adapter;
        struct link_config *lc = &pi->link_cfg;
        int rc, val;

        val = lc->force_fec;
        MPASS(val >= -1 && val <= 1);
        rc = sysctl_handle_int(oidp, &val, 0, req);
        if (rc != 0 || req->newptr == NULL)
                return (rc);
        if (!(lc->pcaps & FW_PORT_CAP32_FORCE_FEC))
                return (ENOTSUP);
        if (val < -1 || val > 1)
                return (EINVAL);

        rc = begin_synchronized_op(sc, &pi->vi[0], SLEEP_OK | INTR_OK, "t4ff");
        if (rc)
                return (rc);
        PORT_LOCK(pi);
        lc->force_fec = val;
        if (!hw_off_limits(sc)) {
                fixup_link_config(pi);
                if (pi->up_vis > 0)
                        rc = apply_link_config(pi);
        }
        PORT_UNLOCK(pi);
        end_synchronized_op(sc, 0);
        return (rc);
}

static int
sysctl_handle_t4_reg64(SYSCTL_HANDLER_ARGS)
{
        struct adapter *sc = arg1;
        int rc, reg = arg2;
        uint64_t val;

        mtx_lock(&sc->reg_lock);
        if (hw_off_limits(sc))
                rc = ENXIO;
        else {
                rc = 0;
                val = t4_read_reg64(sc, reg);
        }
        mtx_unlock(&sc->reg_lock);
        if (rc == 0)
                rc = sysctl_handle_64(oidp, &val, 0, req);
        return (rc);
}

static int
sysctl_temperature(SYSCTL_HANDLER_ARGS)
{
        struct adapter *sc = arg1;
        int rc, t;
        uint32_t param, val;

        rc = begin_synchronized_op(sc, NULL, SLEEP_OK | INTR_OK, "t4temp");
        if (rc)
                return (rc);
        if (hw_off_limits(sc))
                rc = ENXIO;
        else {
                param = V_FW_PARAMS_MNEM(FW_PARAMS_MNEM_DEV) |
                    V_FW_PARAMS_PARAM_X(FW_PARAMS_PARAM_DEV_DIAG) |
                    V_FW_PARAMS_PARAM_Y(FW_PARAM_DEV_DIAG_TMP);
                rc = -t4_query_params(sc, sc->mbox, sc->pf, 0, 1, &param, &val);
        }
        end_synchronized_op(sc, 0);
        if (rc)
                return (rc);

        /* unknown is returned as 0 but we display -1 in that case */
        t = val == 0 ? -1 : val;

        rc = sysctl_handle_int(oidp, &t, 0, req);
        return (rc);
}

static int
sysctl_vdd(SYSCTL_HANDLER_ARGS)
{
        struct adapter *sc = arg1;
        int rc;
        uint32_t param, val;

        if (sc->params.core_vdd == 0) {
                rc = begin_synchronized_op(sc, NULL, SLEEP_OK | INTR_OK,
                    "t4vdd");
                if (rc)
                        return (rc);
                if (hw_off_limits(sc))
                        rc = ENXIO;
                else {
                        param = V_FW_PARAMS_MNEM(FW_PARAMS_MNEM_DEV) |
                            V_FW_PARAMS_PARAM_X(FW_PARAMS_PARAM_DEV_DIAG) |
                            V_FW_PARAMS_PARAM_Y(FW_PARAM_DEV_DIAG_VDD);
                        rc = -t4_query_params(sc, sc->mbox, sc->pf, 0, 1,
                            &param, &val);
                }
                end_synchronized_op(sc, 0);
                if (rc)
                        return (rc);
                sc->params.core_vdd = val;
        }

        return (sysctl_handle_int(oidp, &sc->params.core_vdd, 0, req));
}

static int
sysctl_reset_sensor(SYSCTL_HANDLER_ARGS)
{
        struct adapter *sc = arg1;
        int rc, v;
        uint32_t param, val;

        v = sc->sensor_resets;
        rc = sysctl_handle_int(oidp, &v, 0, req);
        if (rc != 0 || req->newptr == NULL || v <= 0)
                return (rc);

        if (sc->params.fw_vers < FW_VERSION32(1, 24, 7, 0) ||
            chip_id(sc) < CHELSIO_T5)
                return (ENOTSUP);

        rc = begin_synchronized_op(sc, NULL, SLEEP_OK | INTR_OK, "t4srst");
        if (rc)
                return (rc);
        if (hw_off_limits(sc))
                rc = ENXIO;
        else {
                param = (V_FW_PARAMS_MNEM(FW_PARAMS_MNEM_DEV) |
                    V_FW_PARAMS_PARAM_X(FW_PARAMS_PARAM_DEV_DIAG) |
                    V_FW_PARAMS_PARAM_Y(FW_PARAM_DEV_DIAG_RESET_TMP_SENSOR));
                val = 1;
                rc = -t4_set_params(sc, sc->mbox, sc->pf, 0, 1, &param, &val);
        }
        end_synchronized_op(sc, 0);
        if (rc == 0)
                sc->sensor_resets++;
        return (rc);
}

static int
sysctl_loadavg(SYSCTL_HANDLER_ARGS)
{
        struct adapter *sc = arg1;
        struct sbuf *sb;
        int rc;
        uint32_t param, val;

        rc = begin_synchronized_op(sc, NULL, SLEEP_OK | INTR_OK, "t4lavg");
        if (rc)
                return (rc);
        if (hw_off_limits(sc))
                rc = ENXIO;
        else {
                param = V_FW_PARAMS_MNEM(FW_PARAMS_MNEM_DEV) |
                    V_FW_PARAMS_PARAM_X(FW_PARAMS_PARAM_DEV_LOAD);
                rc = -t4_query_params(sc, sc->mbox, sc->pf, 0, 1, &param, &val);
        }
        end_synchronized_op(sc, 0);
        if (rc)
                return (rc);

        rc = sysctl_wire_old_buffer(req, 0);
        if (rc != 0)
                return (rc);

        sb = sbuf_new_for_sysctl(NULL, NULL, 4096, req);
        if (sb == NULL)
                return (ENOMEM);

        if (val == 0xffffffff) {
                /* Only debug and custom firmwares report load averages. */
                sbuf_printf(sb, "not available");
        } else {
                sbuf_printf(sb, "%d %d %d", val & 0xff, (val >> 8) & 0xff,
                    (val >> 16) & 0xff);
        }
        rc = sbuf_finish(sb);
        sbuf_delete(sb);

        return (rc);
}

static int
sysctl_cctrl(SYSCTL_HANDLER_ARGS)
{
        struct adapter *sc = arg1;
        struct sbuf *sb;
        int rc, i;
        uint16_t incr[NMTUS][NCCTRL_WIN];
        static const char *dec_fac[] = {
                "0.5", "0.5625", "0.625", "0.6875", "0.75", "0.8125", "0.875",
                "0.9375"
        };

        rc = sysctl_wire_old_buffer(req, 0);
        if (rc != 0)
                return (rc);

        sb = sbuf_new_for_sysctl(NULL, NULL, 4096, req);
        if (sb == NULL)
                return (ENOMEM);

        mtx_lock(&sc->reg_lock);
        if (hw_off_limits(sc))
                rc = ENXIO;
        else
                t4_read_cong_tbl(sc, incr);
        mtx_unlock(&sc->reg_lock);
        if (rc)
                goto done;

        for (i = 0; i < NCCTRL_WIN; ++i) {
                sbuf_printf(sb, "%2d: %4u %4u %4u %4u %4u %4u %4u %4u\n", i,
                    incr[0][i], incr[1][i], incr[2][i], incr[3][i], incr[4][i],
                    incr[5][i], incr[6][i], incr[7][i]);
                sbuf_printf(sb, "%8u %4u %4u %4u %4u %4u %4u %4u %5u %s\n",
                    incr[8][i], incr[9][i], incr[10][i], incr[11][i],
                    incr[12][i], incr[13][i], incr[14][i], incr[15][i],
                    sc->params.a_wnd[i], dec_fac[sc->params.b_wnd[i]]);
        }

        rc = sbuf_finish(sb);
done:
        sbuf_delete(sb);
        return (rc);
}

static const char *qname[CIM_NUM_IBQ + CIM_NUM_OBQ_T5] = {
        "TP0", "TP1", "ULP", "SGE0", "SGE1", "NC-SI",   /* ibq's */
        "ULP0", "ULP1", "ULP2", "ULP3", "SGE", "NC-SI", /* obq's */
        "SGE0-RX", "SGE1-RX"    /* additional obq's (T5 onwards) */
};

static int
sysctl_cim_ibq_obq(SYSCTL_HANDLER_ARGS)
{
        struct adapter *sc = arg1;
        struct sbuf *sb;
        int rc, i, n, qid = arg2;
        uint32_t *buf, *p;
        char *qtype;
        u_int cim_num_obq = sc->chip_params->cim_num_obq;

        KASSERT(qid >= 0 && qid < CIM_NUM_IBQ + cim_num_obq,
            ("%s: bad qid %d\n", __func__, qid));

        if (qid < CIM_NUM_IBQ) {
                /* inbound queue */
                qtype = "IBQ";
                n = 4 * CIM_IBQ_SIZE;
                buf = malloc(n * sizeof(uint32_t), M_CXGBE, M_ZERO | M_WAITOK);
                mtx_lock(&sc->reg_lock);
                if (hw_off_limits(sc))
                        rc = -ENXIO;
                else
                        rc = t4_read_cim_ibq(sc, qid, buf, n);
                mtx_unlock(&sc->reg_lock);
        } else {
                /* outbound queue */
                qtype = "OBQ";
                qid -= CIM_NUM_IBQ;
                n = 4 * cim_num_obq * CIM_OBQ_SIZE;
                buf = malloc(n * sizeof(uint32_t), M_CXGBE, M_ZERO | M_WAITOK);
                mtx_lock(&sc->reg_lock);
                if (hw_off_limits(sc))
                        rc = -ENXIO;
                else
                        rc = t4_read_cim_obq(sc, qid, buf, n);
                mtx_unlock(&sc->reg_lock);
        }

        if (rc < 0) {
                rc = -rc;
                goto done;
        }
        n = rc * sizeof(uint32_t);      /* rc has # of words actually read */

        rc = sysctl_wire_old_buffer(req, 0);
        if (rc != 0)
                goto done;

        sb = sbuf_new_for_sysctl(NULL, NULL, PAGE_SIZE, req);
        if (sb == NULL) {
                rc = ENOMEM;
                goto done;
        }

        sbuf_printf(sb, "%s%d %s", qtype , qid, qname[arg2]);
        for (i = 0, p = buf; i < n; i += 16, p += 4)
                sbuf_printf(sb, "\n%#06x: %08x %08x %08x %08x", i, p[0], p[1],
                    p[2], p[3]);

        rc = sbuf_finish(sb);
        sbuf_delete(sb);
done:
        free(buf, M_CXGBE);
        return (rc);
}

static void
sbuf_cim_la4(struct adapter *sc, struct sbuf *sb, uint32_t *buf, uint32_t cfg)
{
        uint32_t *p;

        sbuf_printf(sb, "Status   Data      PC%s",
            cfg & F_UPDBGLACAPTPCONLY ? "" :
            "     LS0Stat  LS0Addr             LS0Data");

        for (p = buf; p <= &buf[sc->params.cim_la_size - 8]; p += 8) {
                if (cfg & F_UPDBGLACAPTPCONLY) {
                        sbuf_printf(sb, "\n  %02x   %08x %08x", p[5] & 0xff,
                            p[6], p[7]);
                        sbuf_printf(sb, "\n  %02x   %02x%06x %02x%06x",
                            (p[3] >> 8) & 0xff, p[3] & 0xff, p[4] >> 8,
                            p[4] & 0xff, p[5] >> 8);
                        sbuf_printf(sb, "\n  %02x   %x%07x %x%07x",
                            (p[0] >> 4) & 0xff, p[0] & 0xf, p[1] >> 4,
                            p[1] & 0xf, p[2] >> 4);
                } else {
                        sbuf_printf(sb,
                            "\n  %02x   %x%07x %x%07x %08x %08x "
                            "%08x%08x%08x%08x",
                            (p[0] >> 4) & 0xff, p[0] & 0xf, p[1] >> 4,
                            p[1] & 0xf, p[2] >> 4, p[2] & 0xf, p[3], p[4], p[5],
                            p[6], p[7]);
                }
        }
}

static void
sbuf_cim_la6(struct adapter *sc, struct sbuf *sb, uint32_t *buf, uint32_t cfg)
{
        uint32_t *p;

        sbuf_printf(sb, "Status   Inst    Data      PC%s",
            cfg & F_UPDBGLACAPTPCONLY ? "" :
            "     LS0Stat  LS0Addr  LS0Data  LS1Stat  LS1Addr  LS1Data");

        for (p = buf; p <= &buf[sc->params.cim_la_size - 10]; p += 10) {
                if (cfg & F_UPDBGLACAPTPCONLY) {
                        sbuf_printf(sb, "\n  %02x   %08x %08x %08x",
                            p[3] & 0xff, p[2], p[1], p[0]);
                        sbuf_printf(sb, "\n  %02x   %02x%06x %02x%06x %02x%06x",
                            (p[6] >> 8) & 0xff, p[6] & 0xff, p[5] >> 8,
                            p[5] & 0xff, p[4] >> 8, p[4] & 0xff, p[3] >> 8);
                        sbuf_printf(sb, "\n  %02x   %04x%04x %04x%04x %04x%04x",
                            (p[9] >> 16) & 0xff, p[9] & 0xffff, p[8] >> 16,
                            p[8] & 0xffff, p[7] >> 16, p[7] & 0xffff,
                            p[6] >> 16);
                } else {
                        sbuf_printf(sb, "\n  %02x   %04x%04x %04x%04x %04x%04x "
                            "%08x %08x %08x %08x %08x %08x",
                            (p[9] >> 16) & 0xff,
                            p[9] & 0xffff, p[8] >> 16,
                            p[8] & 0xffff, p[7] >> 16,
                            p[7] & 0xffff, p[6] >> 16,
                            p[2], p[1], p[0], p[5], p[4], p[3]);
                }
        }
}

static int
sbuf_cim_la(struct adapter *sc, struct sbuf *sb, int flags)
{
        uint32_t cfg, *buf;
        int rc;

        MPASS(flags == M_WAITOK || flags == M_NOWAIT);
        buf = malloc(sc->params.cim_la_size * sizeof(uint32_t), M_CXGBE,
            M_ZERO | flags);
        if (buf == NULL)
                return (ENOMEM);

        mtx_lock(&sc->reg_lock);
        if (hw_off_limits(sc))
                rc = ENXIO;
        else {
                rc = -t4_cim_read(sc, A_UP_UP_DBG_LA_CFG, 1, &cfg);
                if (rc == 0)
                        rc = -t4_cim_read_la(sc, buf, NULL);
        }
        mtx_unlock(&sc->reg_lock);
        if (rc == 0) {
                if (chip_id(sc) < CHELSIO_T6)
                        sbuf_cim_la4(sc, sb, buf, cfg);
                else
                        sbuf_cim_la6(sc, sb, buf, cfg);
        }
        free(buf, M_CXGBE);
        return (rc);
}

static int
sysctl_cim_la(SYSCTL_HANDLER_ARGS)
{
        struct adapter *sc = arg1;
        struct sbuf *sb;
        int rc;

        rc = sysctl_wire_old_buffer(req, 0);
        if (rc != 0)
                return (rc);
        sb = sbuf_new_for_sysctl(NULL, NULL, 4096, req);
        if (sb == NULL)
                return (ENOMEM);

        rc = sbuf_cim_la(sc, sb, M_WAITOK);
        if (rc == 0)
                rc = sbuf_finish(sb);
        sbuf_delete(sb);
        return (rc);
}

bool
t4_os_dump_cimla(struct adapter *sc, int arg, bool verbose)
{
        struct sbuf sb;
        int rc;

        if (sbuf_new(&sb, NULL, 4096, SBUF_AUTOEXTEND) != &sb)
                return (false);
        rc = sbuf_cim_la(sc, &sb, M_NOWAIT);
        if (rc == 0) {
                rc = sbuf_finish(&sb);
                if (rc == 0) {
                        log(LOG_DEBUG, "%s: CIM LA dump follows.\n%s",
                                device_get_nameunit(sc->dev), sbuf_data(&sb));
                }
        }
        sbuf_delete(&sb);
        return (false);
}

static int
sysctl_cim_ma_la(SYSCTL_HANDLER_ARGS)
{
        struct adapter *sc = arg1;
        u_int i;
        struct sbuf *sb;
        uint32_t *buf, *p;
        int rc;

        rc = sysctl_wire_old_buffer(req, 0);
        if (rc != 0)
                return (rc);

        sb = sbuf_new_for_sysctl(NULL, NULL, 4096, req);
        if (sb == NULL)
                return (ENOMEM);

        buf = malloc(2 * CIM_MALA_SIZE * 5 * sizeof(uint32_t), M_CXGBE,
            M_ZERO | M_WAITOK);

        mtx_lock(&sc->reg_lock);
        if (hw_off_limits(sc))
                rc = ENXIO;
        else
                t4_cim_read_ma_la(sc, buf, buf + 5 * CIM_MALA_SIZE);
        mtx_unlock(&sc->reg_lock);
        if (rc)
                goto done;

        p = buf;
        for (i = 0; i < CIM_MALA_SIZE; i++, p += 5) {
                sbuf_printf(sb, "\n%02x%08x%08x%08x%08x", p[4], p[3], p[2],
                    p[1], p[0]);
        }

        sbuf_printf(sb, "\n\nCnt ID Tag UE       Data       RDY VLD");
        for (i = 0; i < CIM_MALA_SIZE; i++, p += 5) {
                sbuf_printf(sb, "\n%3u %2u  %x   %u %08x%08x  %u   %u",
                    (p[2] >> 10) & 0xff, (p[2] >> 7) & 7,
                    (p[2] >> 3) & 0xf, (p[2] >> 2) & 1,
                    (p[1] >> 2) | ((p[2] & 3) << 30),
                    (p[0] >> 2) | ((p[1] & 3) << 30), (p[0] >> 1) & 1,
                    p[0] & 1);
        }
        rc = sbuf_finish(sb);
done:
        sbuf_delete(sb);
        free(buf, M_CXGBE);
        return (rc);
}

static int
sysctl_cim_pif_la(SYSCTL_HANDLER_ARGS)
{
        struct adapter *sc = arg1;
        u_int i;
        struct sbuf *sb;
        uint32_t *buf, *p;
        int rc;

        rc = sysctl_wire_old_buffer(req, 0);
        if (rc != 0)
                return (rc);

        sb = sbuf_new_for_sysctl(NULL, NULL, 4096, req);
        if (sb == NULL)
                return (ENOMEM);

        buf = malloc(2 * CIM_PIFLA_SIZE * 6 * sizeof(uint32_t), M_CXGBE,
            M_ZERO | M_WAITOK);

        mtx_lock(&sc->reg_lock);
        if (hw_off_limits(sc))
                rc = ENXIO;
        else
                t4_cim_read_pif_la(sc, buf, buf + 6 * CIM_PIFLA_SIZE, NULL, NULL);
        mtx_unlock(&sc->reg_lock);
        if (rc)
                goto done;

        p = buf;
        sbuf_printf(sb, "Cntl ID DataBE   Addr                 Data");
        for (i = 0; i < CIM_PIFLA_SIZE; i++, p += 6) {
                sbuf_printf(sb, "\n %02x  %02x  %04x  %08x %08x%08x%08x%08x",
                    (p[5] >> 22) & 0xff, (p[5] >> 16) & 0x3f, p[5] & 0xffff,
                    p[4], p[3], p[2], p[1], p[0]);
        }

        sbuf_printf(sb, "\n\nCntl ID               Data");
        for (i = 0; i < CIM_PIFLA_SIZE; i++, p += 6) {
                sbuf_printf(sb, "\n %02x  %02x %08x%08x%08x%08x",
                    (p[4] >> 6) & 0xff, p[4] & 0x3f, p[3], p[2], p[1], p[0]);
        }

        rc = sbuf_finish(sb);
done:
        sbuf_delete(sb);
        free(buf, M_CXGBE);
        return (rc);
}

static int
sysctl_cim_qcfg(SYSCTL_HANDLER_ARGS)
{
        struct adapter *sc = arg1;
        struct sbuf *sb;
        int rc, i;
        uint16_t base[CIM_NUM_IBQ + CIM_NUM_OBQ_T5];
        uint16_t size[CIM_NUM_IBQ + CIM_NUM_OBQ_T5];
        uint16_t thres[CIM_NUM_IBQ];
        uint32_t obq_wr[2 * CIM_NUM_OBQ_T5], *wr = obq_wr;
        uint32_t stat[4 * (CIM_NUM_IBQ + CIM_NUM_OBQ_T5)], *p = stat;
        u_int cim_num_obq, ibq_rdaddr, obq_rdaddr, nq;

        cim_num_obq = sc->chip_params->cim_num_obq;
        if (is_t4(sc)) {
                ibq_rdaddr = A_UP_IBQ_0_RDADDR;
                obq_rdaddr = A_UP_OBQ_0_REALADDR;
        } else {
                ibq_rdaddr = A_UP_IBQ_0_SHADOW_RDADDR;
                obq_rdaddr = A_UP_OBQ_0_SHADOW_REALADDR;
        }
        nq = CIM_NUM_IBQ + cim_num_obq;

        mtx_lock(&sc->reg_lock);
        if (hw_off_limits(sc))
                rc = ENXIO;
        else {
                rc = -t4_cim_read(sc, ibq_rdaddr, 4 * nq, stat);
                if (rc == 0) {
                        rc = -t4_cim_read(sc, obq_rdaddr, 2 * cim_num_obq,
                            obq_wr);
                        if (rc == 0)
                                t4_read_cimq_cfg(sc, base, size, thres);
                }
        }
        mtx_unlock(&sc->reg_lock);
        if (rc)
                return (rc);

        rc = sysctl_wire_old_buffer(req, 0);
        if (rc != 0)
                return (rc);

        sb = sbuf_new_for_sysctl(NULL, NULL, PAGE_SIZE, req);
        if (sb == NULL)
                return (ENOMEM);

        sbuf_printf(sb,
            "  Queue  Base  Size Thres  RdPtr WrPtr  SOP  EOP Avail");

        for (i = 0; i < CIM_NUM_IBQ; i++, p += 4)
                sbuf_printf(sb, "\n%7s %5x %5u %5u %6x  %4x %4u %4u %5u",
                    qname[i], base[i], size[i], thres[i], G_IBQRDADDR(p[0]),
                    G_IBQWRADDR(p[1]), G_QUESOPCNT(p[3]), G_QUEEOPCNT(p[3]),
                    G_QUEREMFLITS(p[2]) * 16);
        for ( ; i < nq; i++, p += 4, wr += 2)
                sbuf_printf(sb, "\n%7s %5x %5u %12x  %4x %4u %4u %5u", qname[i],
                    base[i], size[i], G_QUERDADDR(p[0]) & 0x3fff,
                    wr[0] - base[i], G_QUESOPCNT(p[3]), G_QUEEOPCNT(p[3]),
                    G_QUEREMFLITS(p[2]) * 16);

        rc = sbuf_finish(sb);
        sbuf_delete(sb);

        return (rc);
}

static int
sysctl_cpl_stats(SYSCTL_HANDLER_ARGS)
{
        struct adapter *sc = arg1;
        struct sbuf *sb;
        int rc;
        struct tp_cpl_stats stats;

        rc = sysctl_wire_old_buffer(req, 0);
        if (rc != 0)
                return (rc);

        sb = sbuf_new_for_sysctl(NULL, NULL, 256, req);
        if (sb == NULL)
                return (ENOMEM);

        mtx_lock(&sc->reg_lock);
        if (hw_off_limits(sc))
                rc = ENXIO;
        else
                t4_tp_get_cpl_stats(sc, &stats, 0);
        mtx_unlock(&sc->reg_lock);
        if (rc)
                goto done;

        if (sc->chip_params->nchan > 2) {
                sbuf_printf(sb, "                 channel 0  channel 1"
                    "  channel 2  channel 3");
                sbuf_printf(sb, "\nCPL requests:   %10u %10u %10u %10u",
                    stats.req[0], stats.req[1], stats.req[2], stats.req[3]);
                sbuf_printf(sb, "\nCPL responses:  %10u %10u %10u %10u",
                    stats.rsp[0], stats.rsp[1], stats.rsp[2], stats.rsp[3]);
        } else {
                sbuf_printf(sb, "                 channel 0  channel 1");
                sbuf_printf(sb, "\nCPL requests:   %10u %10u",
                    stats.req[0], stats.req[1]);
                sbuf_printf(sb, "\nCPL responses:  %10u %10u",
                    stats.rsp[0], stats.rsp[1]);
        }

        rc = sbuf_finish(sb);
done:
        sbuf_delete(sb);
        return (rc);
}

static int
sysctl_ddp_stats(SYSCTL_HANDLER_ARGS)
{
        struct adapter *sc = arg1;
        struct sbuf *sb;
        int rc;
        struct tp_usm_stats stats;

        rc = sysctl_wire_old_buffer(req, 0);
        if (rc != 0)
                return(rc);

        sb = sbuf_new_for_sysctl(NULL, NULL, 256, req);
        if (sb == NULL)
                return (ENOMEM);

        mtx_lock(&sc->reg_lock);
        if (hw_off_limits(sc))
                rc = ENXIO;
        else
                t4_get_usm_stats(sc, &stats, 1);
        mtx_unlock(&sc->reg_lock);
        if (rc == 0) {
                sbuf_printf(sb, "Frames: %u\n", stats.frames);
                sbuf_printf(sb, "Octets: %ju\n", stats.octets);
                sbuf_printf(sb, "Drops:  %u", stats.drops);
                rc = sbuf_finish(sb);
        }
        sbuf_delete(sb);

        return (rc);
}

static int
sysctl_tid_stats(SYSCTL_HANDLER_ARGS)
{
        struct adapter *sc = arg1;
        struct sbuf *sb;
        int rc;
        struct tp_tid_stats stats;

        rc = sysctl_wire_old_buffer(req, 0);
        if (rc != 0)
                return(rc);

        sb = sbuf_new_for_sysctl(NULL, NULL, 256, req);
        if (sb == NULL)
                return (ENOMEM);

        mtx_lock(&sc->reg_lock);
        if (hw_off_limits(sc))
                rc = ENXIO;
        else
                t4_tp_get_tid_stats(sc, &stats, 1);
        mtx_unlock(&sc->reg_lock);
        if (rc == 0) {
                sbuf_printf(sb, "Delete:     %u\n", stats.del);
                sbuf_printf(sb, "Invalidate: %u\n", stats.inv);
                sbuf_printf(sb, "Active:     %u\n", stats.act);
                sbuf_printf(sb, "Passive:    %u", stats.pas);
                rc = sbuf_finish(sb);
        }
        sbuf_delete(sb);

        return (rc);
}

static const char * const devlog_level_strings[] = {
        [FW_DEVLOG_LEVEL_EMERG]         = "EMERG",
        [FW_DEVLOG_LEVEL_CRIT]          = "CRIT",
        [FW_DEVLOG_LEVEL_ERR]           = "ERR",
        [FW_DEVLOG_LEVEL_NOTICE]        = "NOTICE",
        [FW_DEVLOG_LEVEL_INFO]          = "INFO",
        [FW_DEVLOG_LEVEL_DEBUG]         = "DEBUG"
};

static const char * const devlog_facility_strings[] = {
        [FW_DEVLOG_FACILITY_CORE]       = "CORE",
        [FW_DEVLOG_FACILITY_CF]         = "CF",
        [FW_DEVLOG_FACILITY_SCHED]      = "SCHED",
        [FW_DEVLOG_FACILITY_TIMER]      = "TIMER",
        [FW_DEVLOG_FACILITY_RES]        = "RES",
        [FW_DEVLOG_FACILITY_HW]         = "HW",
        [FW_DEVLOG_FACILITY_FLR]        = "FLR",
        [FW_DEVLOG_FACILITY_DMAQ]       = "DMAQ",
        [FW_DEVLOG_FACILITY_PHY]        = "PHY",
        [FW_DEVLOG_FACILITY_MAC]        = "MAC",
        [FW_DEVLOG_FACILITY_PORT]       = "PORT",
        [FW_DEVLOG_FACILITY_VI]         = "VI",
        [FW_DEVLOG_FACILITY_FILTER]     = "FILTER",
        [FW_DEVLOG_FACILITY_ACL]        = "ACL",
        [FW_DEVLOG_FACILITY_TM]         = "TM",
        [FW_DEVLOG_FACILITY_QFC]        = "QFC",
        [FW_DEVLOG_FACILITY_DCB]        = "DCB",
        [FW_DEVLOG_FACILITY_ETH]        = "ETH",
        [FW_DEVLOG_FACILITY_OFLD]       = "OFLD",
        [FW_DEVLOG_FACILITY_RI]         = "RI",
        [FW_DEVLOG_FACILITY_ISCSI]      = "ISCSI",
        [FW_DEVLOG_FACILITY_FCOE]       = "FCOE",
        [FW_DEVLOG_FACILITY_FOISCSI]    = "FOISCSI",
        [FW_DEVLOG_FACILITY_FOFCOE]     = "FOFCOE",
        [FW_DEVLOG_FACILITY_CHNET]      = "CHNET",
};

static int
sbuf_devlog(struct adapter *sc, struct sbuf *sb, int flags)
{
        int i, j, rc, nentries, first = 0;
        struct devlog_params *dparams = &sc->params.devlog;
        struct fw_devlog_e *buf, *e;
        uint64_t ftstamp = UINT64_MAX;

        if (dparams->addr == 0)
                return (ENXIO);

        MPASS(flags == M_WAITOK || flags == M_NOWAIT);
        buf = malloc(dparams->size, M_CXGBE, M_ZERO | flags);
        if (buf == NULL)
                return (ENOMEM);

        mtx_lock(&sc->reg_lock);
        if (hw_off_limits(sc))
                rc = ENXIO;
        else
                rc = read_via_memwin(sc, 1, dparams->addr, (void *)buf,
                    dparams->size);
        mtx_unlock(&sc->reg_lock);
        if (rc != 0)
                goto done;

        nentries = dparams->size / sizeof(struct fw_devlog_e);
        for (i = 0; i < nentries; i++) {
                e = &buf[i];

                if (e->timestamp == 0)
                        break;  /* end */

                e->timestamp = be64toh(e->timestamp);
                e->seqno = be32toh(e->seqno);
                for (j = 0; j < 8; j++)
                        e->params[j] = be32toh(e->params[j]);

                if (e->timestamp < ftstamp) {
                        ftstamp = e->timestamp;
                        first = i;
                }
        }

        if (buf[first].timestamp == 0)
                goto done;      /* nothing in the log */

        sbuf_printf(sb, "%10s  %15s  %8s  %8s  %s\n",
            "Seq#", "Tstamp", "Level", "Facility", "Message");

        i = first;
        do {
                e = &buf[i];
                if (e->timestamp == 0)
                        break;  /* end */

                sbuf_printf(sb, "%10d  %15ju  %8s  %8s  ",
                    e->seqno, e->timestamp,
                    (e->level < nitems(devlog_level_strings) ?
                        devlog_level_strings[e->level] : "UNKNOWN"),
                    (e->facility < nitems(devlog_facility_strings) ?
                        devlog_facility_strings[e->facility] : "UNKNOWN"));
                sbuf_printf(sb, e->fmt, e->params[0], e->params[1],
                    e->params[2], e->params[3], e->params[4],
                    e->params[5], e->params[6], e->params[7]);

                if (++i == nentries)
                        i = 0;
        } while (i != first);
done:
        free(buf, M_CXGBE);
        return (rc);
}

static int
sysctl_devlog(SYSCTL_HANDLER_ARGS)
{
        struct adapter *sc = arg1;
        int rc;
        struct sbuf *sb;

        rc = sysctl_wire_old_buffer(req, 0);
        if (rc != 0)
                return (rc);
        sb = sbuf_new_for_sysctl(NULL, NULL, 4096, req);
        if (sb == NULL)
                return (ENOMEM);

        rc = sbuf_devlog(sc, sb, M_WAITOK);
        if (rc == 0)
                rc = sbuf_finish(sb);
        sbuf_delete(sb);
        return (rc);
}

void
t4_os_dump_devlog(struct adapter *sc)
{
        int rc;
        struct sbuf sb;

        if (sbuf_new(&sb, NULL, 4096, SBUF_AUTOEXTEND) != &sb)
                return;
        rc = sbuf_devlog(sc, &sb, M_NOWAIT);
        if (rc == 0) {
                rc = sbuf_finish(&sb);
                if (rc == 0) {
                        log(LOG_DEBUG, "%s: device log follows.\n%s",
                                device_get_nameunit(sc->dev), sbuf_data(&sb));
                }
        }
        sbuf_delete(&sb);
}

static int
sysctl_fcoe_stats(SYSCTL_HANDLER_ARGS)
{
        struct adapter *sc = arg1;
        struct sbuf *sb;
        int rc;
        struct tp_fcoe_stats stats[MAX_NCHAN];
        int i, nchan = sc->chip_params->nchan;

        rc = sysctl_wire_old_buffer(req, 0);
        if (rc != 0)
                return (rc);

        mtx_lock(&sc->reg_lock);
        if (hw_off_limits(sc))
                rc = ENXIO;
        else {
                for (i = 0; i < nchan; i++)
                        t4_get_fcoe_stats(sc, i, &stats[i], 1);
        }
        mtx_unlock(&sc->reg_lock);
        if (rc != 0)
                return (rc);

        sb = sbuf_new_for_sysctl(NULL, NULL, 256, req);
        if (sb == NULL)
                return (ENOMEM);

        if (nchan > 2) {
                sbuf_printf(sb, "                   channel 0        channel 1"
                    "        channel 2        channel 3");
                sbuf_printf(sb, "\noctetsDDP:  %16ju %16ju %16ju %16ju",
                    stats[0].octets_ddp, stats[1].octets_ddp,
                    stats[2].octets_ddp, stats[3].octets_ddp);
                sbuf_printf(sb, "\nframesDDP:  %16u %16u %16u %16u",
                    stats[0].frames_ddp, stats[1].frames_ddp,
                    stats[2].frames_ddp, stats[3].frames_ddp);
                sbuf_printf(sb, "\nframesDrop: %16u %16u %16u %16u",
                    stats[0].frames_drop, stats[1].frames_drop,
                    stats[2].frames_drop, stats[3].frames_drop);
        } else {
                sbuf_printf(sb, "                   channel 0        channel 1");
                sbuf_printf(sb, "\noctetsDDP:  %16ju %16ju",
                    stats[0].octets_ddp, stats[1].octets_ddp);
                sbuf_printf(sb, "\nframesDDP:  %16u %16u",
                    stats[0].frames_ddp, stats[1].frames_ddp);
                sbuf_printf(sb, "\nframesDrop: %16u %16u",
                    stats[0].frames_drop, stats[1].frames_drop);
        }

        rc = sbuf_finish(sb);
        sbuf_delete(sb);

        return (rc);
}

static int
sysctl_hw_sched(SYSCTL_HANDLER_ARGS)
{
        struct adapter *sc = arg1;
        struct sbuf *sb;
        int rc, i;
        unsigned int map, kbps, ipg, mode;
        unsigned int pace_tab[NTX_SCHED];

        rc = sysctl_wire_old_buffer(req, 0);
        if (rc != 0)
                return (rc);

        sb = sbuf_new_for_sysctl(NULL, NULL, 512, req);
        if (sb == NULL)
                return (ENOMEM);

        mtx_lock(&sc->reg_lock);
        if (hw_off_limits(sc)) {
                rc = ENXIO;
                goto done;
        }

        map = t4_read_reg(sc, A_TP_TX_MOD_QUEUE_REQ_MAP);
        mode = G_TIMERMODE(t4_read_reg(sc, A_TP_MOD_CONFIG));
        t4_read_pace_tbl(sc, pace_tab);

        sbuf_printf(sb, "Scheduler  Mode   Channel  Rate (Kbps)   "
            "Class IPG (0.1 ns)   Flow IPG (us)");

        for (i = 0; i < NTX_SCHED; ++i, map >>= 2) {
                t4_get_tx_sched(sc, i, &kbps, &ipg, 1);
                sbuf_printf(sb, "\n    %u      %-5s     %u     ", i,
                    (mode & (1 << i)) ? "flow" : "class", map & 3);
                if (kbps)
                        sbuf_printf(sb, "%9u     ", kbps);
                else
                        sbuf_printf(sb, " disabled     ");

                if (ipg)
                        sbuf_printf(sb, "%13u        ", ipg);
                else
                        sbuf_printf(sb, "     disabled        ");

                if (pace_tab[i])
                        sbuf_printf(sb, "%10u", pace_tab[i]);
                else
                        sbuf_printf(sb, "  disabled");
        }
        rc = sbuf_finish(sb);
done:
        mtx_unlock(&sc->reg_lock);
        sbuf_delete(sb);
        return (rc);
}

static int
sysctl_lb_stats(SYSCTL_HANDLER_ARGS)
{
        struct adapter *sc = arg1;
        struct sbuf *sb;
        int rc, i, j;
        uint64_t *p0, *p1;
        struct lb_port_stats s[2];
        static const char *stat_name[] = {
                "OctetsOK:", "FramesOK:", "BcastFrames:", "McastFrames:",
                "UcastFrames:", "ErrorFrames:", "Frames64:", "Frames65To127:",
                "Frames128To255:", "Frames256To511:", "Frames512To1023:",
                "Frames1024To1518:", "Frames1519ToMax:", "FramesDropped:",
                "BG0FramesDropped:", "BG1FramesDropped:", "BG2FramesDropped:",
                "BG3FramesDropped:", "BG0FramesTrunc:", "BG1FramesTrunc:",
                "BG2FramesTrunc:", "BG3FramesTrunc:"
        };

        rc = sysctl_wire_old_buffer(req, 0);
        if (rc != 0)
                return (rc);

        sb = sbuf_new_for_sysctl(NULL, NULL, 4096, req);
        if (sb == NULL)
                return (ENOMEM);

        memset(s, 0, sizeof(s));

        for (i = 0; i < sc->chip_params->nchan; i += 2) {
                mtx_lock(&sc->reg_lock);
                if (hw_off_limits(sc))
                        rc = ENXIO;
                else {
                        t4_get_lb_stats(sc, i, &s[0]);
                        t4_get_lb_stats(sc, i + 1, &s[1]);
                }
                mtx_unlock(&sc->reg_lock);
                if (rc != 0)
                        break;

                p0 = &s[0].octets;
                p1 = &s[1].octets;
                sbuf_printf(sb, "%s                       Loopback %u"
                    "           Loopback %u", i == 0 ? "" : "\n", i, i + 1);

                for (j = 0; j < nitems(stat_name); j++)
                        sbuf_printf(sb, "\n%-17s %20ju %20ju", stat_name[j],
                                   *p0++, *p1++);
        }

        rc = sbuf_finish(sb);
        sbuf_delete(sb);

        return (rc);
}

static int
sysctl_linkdnrc(SYSCTL_HANDLER_ARGS)
{
        int rc = 0;
        struct port_info *pi = arg1;
        struct link_config *lc = &pi->link_cfg;
        struct sbuf *sb;

        rc = sysctl_wire_old_buffer(req, 0);
        if (rc != 0)
                return(rc);
        sb = sbuf_new_for_sysctl(NULL, NULL, 64, req);
        if (sb == NULL)
                return (ENOMEM);

        if (lc->link_ok || lc->link_down_rc == 255)
                sbuf_printf(sb, "n/a");
        else
                sbuf_printf(sb, "%s", t4_link_down_rc_str(lc->link_down_rc));

        rc = sbuf_finish(sb);
        sbuf_delete(sb);

        return (rc);
}

struct mem_desc {
        unsigned int base;
        unsigned int limit;
        unsigned int idx;
};

static int
mem_desc_cmp(const void *a, const void *b)
{
        return ((const struct mem_desc *)a)->base -
               ((const struct mem_desc *)b)->base;
}

static void
mem_region_show(struct sbuf *sb, const char *name, unsigned int from,
    unsigned int to)
{
        unsigned int size;

        if (from == to)
                return;

        size = to - from + 1;
        if (size == 0)
                return;

        /* XXX: need humanize_number(3) in libkern for a more readable 'size' */
        sbuf_printf(sb, "%-15s %#x-%#x [%u]\n", name, from, to, size);
}

static int
sysctl_meminfo(SYSCTL_HANDLER_ARGS)
{
        struct adapter *sc = arg1;
        struct sbuf *sb;
        int rc, i, n;
        uint32_t lo, hi, used, alloc;
        static const char *memory[] = {
                "EDC0:", "EDC1:", "MC:", "MC0:", "MC1:", "HMA:"
        };
        static const char *region[] = {
                "DBQ contexts:", "IMSG contexts:", "FLM cache:", "TCBs:",
                "Pstructs:", "Timers:", "Rx FL:", "Tx FL:", "Pstruct FL:",
                "Tx payload:", "Rx payload:", "LE hash:", "iSCSI region:",
                "TDDP region:", "TPT region:", "STAG region:", "RQ region:",
                "RQUDP region:", "PBL region:", "TXPBL region:",
                "DBVFIFO region:", "ULPRX state:", "ULPTX state:",
                "On-chip queues:", "TLS keys:",
        };
        struct mem_desc avail[4];
        struct mem_desc mem[nitems(region) + 3];        /* up to 3 holes */
        struct mem_desc *md = mem;

        rc = sysctl_wire_old_buffer(req, 0);
        if (rc != 0)
                return (rc);

        sb = sbuf_new_for_sysctl(NULL, NULL, 4096, req);
        if (sb == NULL)
                return (ENOMEM);

        for (i = 0; i < nitems(mem); i++) {
                mem[i].limit = 0;
                mem[i].idx = i;
        }

        mtx_lock(&sc->reg_lock);
        if (hw_off_limits(sc)) {
                rc = ENXIO;
                goto done;
        }

        /* Find and sort the populated memory ranges */
        i = 0;
        lo = t4_read_reg(sc, A_MA_TARGET_MEM_ENABLE);
        if (lo & F_EDRAM0_ENABLE) {
                hi = t4_read_reg(sc, A_MA_EDRAM0_BAR);
                avail[i].base = G_EDRAM0_BASE(hi) << 20;
                avail[i].limit = avail[i].base + (G_EDRAM0_SIZE(hi) << 20);
                avail[i].idx = 0;
                i++;
        }
        if (lo & F_EDRAM1_ENABLE) {
                hi = t4_read_reg(sc, A_MA_EDRAM1_BAR);
                avail[i].base = G_EDRAM1_BASE(hi) << 20;
                avail[i].limit = avail[i].base + (G_EDRAM1_SIZE(hi) << 20);
                avail[i].idx = 1;
                i++;
        }
        if (lo & F_EXT_MEM_ENABLE) {
                hi = t4_read_reg(sc, A_MA_EXT_MEMORY_BAR);
                avail[i].base = G_EXT_MEM_BASE(hi) << 20;
                avail[i].limit = avail[i].base + (G_EXT_MEM_SIZE(hi) << 20);
                avail[i].idx = is_t5(sc) ? 3 : 2;       /* Call it MC0 for T5 */
                i++;
        }
        if (is_t5(sc) && lo & F_EXT_MEM1_ENABLE) {
                hi = t4_read_reg(sc, A_MA_EXT_MEMORY1_BAR);
                avail[i].base = G_EXT_MEM1_BASE(hi) << 20;
                avail[i].limit = avail[i].base + (G_EXT_MEM1_SIZE(hi) << 20);
                avail[i].idx = 4;
                i++;
        }
        if (is_t6(sc) && lo & F_HMA_MUX) {
                hi = t4_read_reg(sc, A_MA_EXT_MEMORY1_BAR);
                avail[i].base = G_EXT_MEM1_BASE(hi) << 20;
                avail[i].limit = avail[i].base + (G_EXT_MEM1_SIZE(hi) << 20);
                avail[i].idx = 5;
                i++;
        }
        MPASS(i <= nitems(avail));
        if (!i)                                    /* no memory available */
                goto done;
        qsort(avail, i, sizeof(struct mem_desc), mem_desc_cmp);

        (md++)->base = t4_read_reg(sc, A_SGE_DBQ_CTXT_BADDR);
        (md++)->base = t4_read_reg(sc, A_SGE_IMSG_CTXT_BADDR);
        (md++)->base = t4_read_reg(sc, A_SGE_FLM_CACHE_BADDR);
        (md++)->base = t4_read_reg(sc, A_TP_CMM_TCB_BASE);
        (md++)->base = t4_read_reg(sc, A_TP_CMM_MM_BASE);
        (md++)->base = t4_read_reg(sc, A_TP_CMM_TIMER_BASE);
        (md++)->base = t4_read_reg(sc, A_TP_CMM_MM_RX_FLST_BASE);
        (md++)->base = t4_read_reg(sc, A_TP_CMM_MM_TX_FLST_BASE);
        (md++)->base = t4_read_reg(sc, A_TP_CMM_MM_PS_FLST_BASE);

        /* the next few have explicit upper bounds */
        md->base = t4_read_reg(sc, A_TP_PMM_TX_BASE);
        md->limit = md->base - 1 +
                    t4_read_reg(sc, A_TP_PMM_TX_PAGE_SIZE) *
                    G_PMTXMAXPAGE(t4_read_reg(sc, A_TP_PMM_TX_MAX_PAGE));
        md++;

        md->base = t4_read_reg(sc, A_TP_PMM_RX_BASE);
        md->limit = md->base - 1 +
                    t4_read_reg(sc, A_TP_PMM_RX_PAGE_SIZE) *
                    G_PMRXMAXPAGE(t4_read_reg(sc, A_TP_PMM_RX_MAX_PAGE));
        md++;

        if (t4_read_reg(sc, A_LE_DB_CONFIG) & F_HASHEN) {
                if (chip_id(sc) <= CHELSIO_T5)
                        md->base = t4_read_reg(sc, A_LE_DB_HASH_TID_BASE);
                else
                        md->base = t4_read_reg(sc, A_LE_DB_HASH_TBL_BASE_ADDR);
                md->limit = 0;
        } else {
                md->base = 0;
                md->idx = nitems(region);  /* hide it */
        }
        md++;

#define ulp_region(reg) \
        md->base = t4_read_reg(sc, A_ULP_ ## reg ## _LLIMIT);\
        (md++)->limit = t4_read_reg(sc, A_ULP_ ## reg ## _ULIMIT)

        ulp_region(RX_ISCSI);
        ulp_region(RX_TDDP);
        ulp_region(TX_TPT);
        ulp_region(RX_STAG);
        ulp_region(RX_RQ);
        ulp_region(RX_RQUDP);
        ulp_region(RX_PBL);
        ulp_region(TX_PBL);
#undef ulp_region

        md->base = 0;
        if (is_t4(sc))
                md->idx = nitems(region);
        else {
                uint32_t size = 0;
                uint32_t sge_ctrl = t4_read_reg(sc, A_SGE_CONTROL2);
                uint32_t fifo_size = t4_read_reg(sc, A_SGE_DBVFIFO_SIZE);

                if (is_t5(sc)) {
                        if (sge_ctrl & F_VFIFO_ENABLE)
                                size = fifo_size << 2;
                } else
                        size = G_T6_DBVFIFO_SIZE(fifo_size) << 6;

                if (size) {
                        md->base = t4_read_reg(sc, A_SGE_DBVFIFO_BADDR);
                        md->limit = md->base + size - 1;
                } else
                        md->idx = nitems(region);
        }
        md++;

        md->base = t4_read_reg(sc, A_ULP_RX_CTX_BASE);
        md->limit = 0;
        md++;
        md->base = t4_read_reg(sc, A_ULP_TX_ERR_TABLE_BASE);
        md->limit = 0;
        md++;

        md->base = sc->vres.ocq.start;
        if (sc->vres.ocq.size)
                md->limit = md->base + sc->vres.ocq.size - 1;
        else
                md->idx = nitems(region);  /* hide it */
        md++;

        md->base = sc->vres.key.start;
        if (sc->vres.key.size)
                md->limit = md->base + sc->vres.key.size - 1;
        else
                md->idx = nitems(region);  /* hide it */
        md++;

        /* add any address-space holes, there can be up to 3 */
        for (n = 0; n < i - 1; n++)
                if (avail[n].limit < avail[n + 1].base)
                        (md++)->base = avail[n].limit;
        if (avail[n].limit)
                (md++)->base = avail[n].limit;

        n = md - mem;
        qsort(mem, n, sizeof(struct mem_desc), mem_desc_cmp);

        for (lo = 0; lo < i; lo++)
                mem_region_show(sb, memory[avail[lo].idx], avail[lo].base,
                                avail[lo].limit - 1);

        sbuf_printf(sb, "\n");
        for (i = 0; i < n; i++) {
                if (mem[i].idx >= nitems(region))
                        continue;                        /* skip holes */
                if (!mem[i].limit)
                        mem[i].limit = i < n - 1 ? mem[i + 1].base - 1 : ~0;
                mem_region_show(sb, region[mem[i].idx], mem[i].base,
                                mem[i].limit);
        }

        sbuf_printf(sb, "\n");
        lo = t4_read_reg(sc, A_CIM_SDRAM_BASE_ADDR);
        hi = t4_read_reg(sc, A_CIM_SDRAM_ADDR_SIZE) + lo - 1;
        mem_region_show(sb, "uP RAM:", lo, hi);

        lo = t4_read_reg(sc, A_CIM_EXTMEM2_BASE_ADDR);
        hi = t4_read_reg(sc, A_CIM_EXTMEM2_ADDR_SIZE) + lo - 1;
        mem_region_show(sb, "uP Extmem2:", lo, hi);

        lo = t4_read_reg(sc, A_TP_PMM_RX_MAX_PAGE);
        sbuf_printf(sb, "\n%u Rx pages of size %uKiB for %u channels\n",
                   G_PMRXMAXPAGE(lo),
                   t4_read_reg(sc, A_TP_PMM_RX_PAGE_SIZE) >> 10,
                   (lo & F_PMRXNUMCHN) ? 2 : 1);

        lo = t4_read_reg(sc, A_TP_PMM_TX_MAX_PAGE);
        hi = t4_read_reg(sc, A_TP_PMM_TX_PAGE_SIZE);
        sbuf_printf(sb, "%u Tx pages of size %u%ciB for %u channels\n",
                   G_PMTXMAXPAGE(lo),
                   hi >= (1 << 20) ? (hi >> 20) : (hi >> 10),
                   hi >= (1 << 20) ? 'M' : 'K', 1 << G_PMTXNUMCHN(lo));
        sbuf_printf(sb, "%u p-structs\n",
                   t4_read_reg(sc, A_TP_CMM_MM_MAX_PSTRUCT));

        for (i = 0; i < 4; i++) {
                if (chip_id(sc) > CHELSIO_T5)
                        lo = t4_read_reg(sc, A_MPS_RX_MAC_BG_PG_CNT0 + i * 4);
                else
                        lo = t4_read_reg(sc, A_MPS_RX_PG_RSV0 + i * 4);
                if (is_t5(sc)) {
                        used = G_T5_USED(lo);
                        alloc = G_T5_ALLOC(lo);
                } else {
                        used = G_USED(lo);
                        alloc = G_ALLOC(lo);
                }
                /* For T6 these are MAC buffer groups */
                sbuf_printf(sb, "\nPort %d using %u pages out of %u allocated",
                    i, used, alloc);
        }
        for (i = 0; i < sc->chip_params->nchan; i++) {
                if (chip_id(sc) > CHELSIO_T5)
                        lo = t4_read_reg(sc, A_MPS_RX_LPBK_BG_PG_CNT0 + i * 4);
                else
                        lo = t4_read_reg(sc, A_MPS_RX_PG_RSV4 + i * 4);
                if (is_t5(sc)) {
                        used = G_T5_USED(lo);
                        alloc = G_T5_ALLOC(lo);
                } else {
                        used = G_USED(lo);
                        alloc = G_ALLOC(lo);
                }
                /* For T6 these are MAC buffer groups */
                sbuf_printf(sb,
                    "\nLoopback %d using %u pages out of %u allocated",
                    i, used, alloc);
        }
done:
        mtx_unlock(&sc->reg_lock);
        if (rc == 0)
                rc = sbuf_finish(sb);
        sbuf_delete(sb);
        return (rc);
}

static inline void
tcamxy2valmask(uint64_t x, uint64_t y, uint8_t *addr, uint64_t *mask)
{
        *mask = x | y;
        y = htobe64(y);
        memcpy(addr, (char *)&y + 2, ETHER_ADDR_LEN);
}

static int
sysctl_mps_tcam(SYSCTL_HANDLER_ARGS)
{
        struct adapter *sc = arg1;
        struct sbuf *sb;
        int rc, i;

        MPASS(chip_id(sc) <= CHELSIO_T5);

        rc = sysctl_wire_old_buffer(req, 0);
        if (rc != 0)
                return (rc);

        sb = sbuf_new_for_sysctl(NULL, NULL, 4096, req);
        if (sb == NULL)
                return (ENOMEM);

        sbuf_printf(sb,
            "Idx  Ethernet address     Mask     Vld Ports PF"
            "  VF              Replication             P0 P1 P2 P3  ML");
        for (i = 0; i < sc->chip_params->mps_tcam_size; i++) {
                uint64_t tcamx, tcamy, mask;
                uint32_t cls_lo, cls_hi;
                uint8_t addr[ETHER_ADDR_LEN];

                mtx_lock(&sc->reg_lock);
                if (hw_off_limits(sc))
                        rc = ENXIO;
                else {
                        tcamy = t4_read_reg64(sc, MPS_CLS_TCAM_Y_L(i));
                        tcamx = t4_read_reg64(sc, MPS_CLS_TCAM_X_L(i));
                }
                mtx_unlock(&sc->reg_lock);
                if (rc != 0)
                        break;
                if (tcamx & tcamy)
                        continue;
                tcamxy2valmask(tcamx, tcamy, addr, &mask);
                mtx_lock(&sc->reg_lock);
                if (hw_off_limits(sc))
                        rc = ENXIO;
                else {
                        cls_lo = t4_read_reg(sc, MPS_CLS_SRAM_L(i));
                        cls_hi = t4_read_reg(sc, MPS_CLS_SRAM_H(i));
                }
                mtx_unlock(&sc->reg_lock);
                if (rc != 0)
                        break;
                sbuf_printf(sb, "\n%3u %02x:%02x:%02x:%02x:%02x:%02x %012jx"
                           "  %c   %#x%4u%4d", i, addr[0], addr[1], addr[2],
                           addr[3], addr[4], addr[5], (uintmax_t)mask,
                           (cls_lo & F_SRAM_VLD) ? 'Y' : 'N',
                           G_PORTMAP(cls_hi), G_PF(cls_lo),
                           (cls_lo & F_VF_VALID) ? G_VF(cls_lo) : -1);

                if (cls_lo & F_REPLICATE) {
                        struct fw_ldst_cmd ldst_cmd;

                        memset(&ldst_cmd, 0, sizeof(ldst_cmd));
                        ldst_cmd.op_to_addrspace =
                            htobe32(V_FW_CMD_OP(FW_LDST_CMD) |
                                F_FW_CMD_REQUEST | F_FW_CMD_READ |
                                V_FW_LDST_CMD_ADDRSPACE(FW_LDST_ADDRSPC_MPS));
                        ldst_cmd.cycles_to_len16 = htobe32(FW_LEN16(ldst_cmd));
                        ldst_cmd.u.mps.rplc.fid_idx =
                            htobe16(V_FW_LDST_CMD_FID(FW_LDST_MPS_RPLC) |
                                V_FW_LDST_CMD_IDX(i));

                        rc = begin_synchronized_op(sc, NULL, SLEEP_OK | INTR_OK,
                            "t4mps");
                        if (rc)
                                break;
                        if (hw_off_limits(sc))
                                rc = ENXIO;
                        else
                                rc = -t4_wr_mbox(sc, sc->mbox, &ldst_cmd,
                                    sizeof(ldst_cmd), &ldst_cmd);
                        end_synchronized_op(sc, 0);
                        if (rc != 0)
                                break;
                        else {
                                sbuf_printf(sb, " %08x %08x %08x %08x",
                                    be32toh(ldst_cmd.u.mps.rplc.rplc127_96),
                                    be32toh(ldst_cmd.u.mps.rplc.rplc95_64),
                                    be32toh(ldst_cmd.u.mps.rplc.rplc63_32),
                                    be32toh(ldst_cmd.u.mps.rplc.rplc31_0));
                        }
                } else
                        sbuf_printf(sb, "%36s", "");

                sbuf_printf(sb, "%4u%3u%3u%3u %#3x", G_SRAM_PRIO0(cls_lo),
                    G_SRAM_PRIO1(cls_lo), G_SRAM_PRIO2(cls_lo),
                    G_SRAM_PRIO3(cls_lo), (cls_lo >> S_MULTILISTEN0) & 0xf);
        }

        if (rc)
                (void) sbuf_finish(sb);
        else
                rc = sbuf_finish(sb);
        sbuf_delete(sb);

        return (rc);
}

static int
sysctl_mps_tcam_t6(SYSCTL_HANDLER_ARGS)
{
        struct adapter *sc = arg1;
        struct sbuf *sb;
        int rc, i;

        MPASS(chip_id(sc) > CHELSIO_T5);

        rc = sysctl_wire_old_buffer(req, 0);
        if (rc != 0)
                return (rc);

        sb = sbuf_new_for_sysctl(NULL, NULL, 4096, req);
        if (sb == NULL)
                return (ENOMEM);

        sbuf_printf(sb, "Idx  Ethernet address     Mask       VNI   Mask"
            "   IVLAN Vld DIP_Hit   Lookup  Port Vld Ports PF  VF"
            "                           Replication"
            "                                    P0 P1 P2 P3  ML\n");

        for (i = 0; i < sc->chip_params->mps_tcam_size; i++) {
                uint8_t dip_hit, vlan_vld, lookup_type, port_num;
                uint16_t ivlan;
                uint64_t tcamx, tcamy, val, mask;
                uint32_t cls_lo, cls_hi, ctl, data2, vnix, vniy;
                uint8_t addr[ETHER_ADDR_LEN];

                ctl = V_CTLREQID(1) | V_CTLCMDTYPE(0) | V_CTLXYBITSEL(0);
                if (i < 256)
                        ctl |= V_CTLTCAMINDEX(i) | V_CTLTCAMSEL(0);
                else
                        ctl |= V_CTLTCAMINDEX(i - 256) | V_CTLTCAMSEL(1);
                mtx_lock(&sc->reg_lock);
                if (hw_off_limits(sc))
                        rc = ENXIO;
                else {
                        t4_write_reg(sc, A_MPS_CLS_TCAM_DATA2_CTL, ctl);
                        val = t4_read_reg(sc, A_MPS_CLS_TCAM_RDATA1_REQ_ID1);
                        tcamy = G_DMACH(val) << 32;
                        tcamy |= t4_read_reg(sc, A_MPS_CLS_TCAM_RDATA0_REQ_ID1);
                        data2 = t4_read_reg(sc, A_MPS_CLS_TCAM_RDATA2_REQ_ID1);
                }
                mtx_unlock(&sc->reg_lock);
                if (rc != 0)
                        break;

                lookup_type = G_DATALKPTYPE(data2);
                port_num = G_DATAPORTNUM(data2);
                if (lookup_type && lookup_type != M_DATALKPTYPE) {
                        /* Inner header VNI */
                        vniy = ((data2 & F_DATAVIDH2) << 23) |
                                       (G_DATAVIDH1(data2) << 16) | G_VIDL(val);
                        dip_hit = data2 & F_DATADIPHIT;
                        vlan_vld = 0;
                } else {
                        vniy = 0;
                        dip_hit = 0;
                        vlan_vld = data2 & F_DATAVIDH2;
                        ivlan = G_VIDL(val);
                }

                ctl |= V_CTLXYBITSEL(1);
                mtx_lock(&sc->reg_lock);
                if (hw_off_limits(sc))
                        rc = ENXIO;
                else {
                        t4_write_reg(sc, A_MPS_CLS_TCAM_DATA2_CTL, ctl);
                        val = t4_read_reg(sc, A_MPS_CLS_TCAM_RDATA1_REQ_ID1);
                        tcamx = G_DMACH(val) << 32;
                        tcamx |= t4_read_reg(sc, A_MPS_CLS_TCAM_RDATA0_REQ_ID1);
                        data2 = t4_read_reg(sc, A_MPS_CLS_TCAM_RDATA2_REQ_ID1);
                }
                mtx_unlock(&sc->reg_lock);
                if (rc != 0)
                        break;

                if (lookup_type && lookup_type != M_DATALKPTYPE) {
                        /* Inner header VNI mask */
                        vnix = ((data2 & F_DATAVIDH2) << 23) |
                               (G_DATAVIDH1(data2) << 16) | G_VIDL(val);
                } else
                        vnix = 0;

                if (tcamx & tcamy)
                        continue;
                tcamxy2valmask(tcamx, tcamy, addr, &mask);

                mtx_lock(&sc->reg_lock);
                if (hw_off_limits(sc))
                        rc = ENXIO;
                else {
                        cls_lo = t4_read_reg(sc, MPS_CLS_SRAM_L(i));
                        cls_hi = t4_read_reg(sc, MPS_CLS_SRAM_H(i));
                }
                mtx_unlock(&sc->reg_lock);
                if (rc != 0)
                        break;

                if (lookup_type && lookup_type != M_DATALKPTYPE) {
                        sbuf_printf(sb, "\n%3u %02x:%02x:%02x:%02x:%02x:%02x "
                            "%012jx %06x %06x    -    -   %3c"
                            "        I  %4x   %3c   %#x%4u%4d", i, addr[0],
                            addr[1], addr[2], addr[3], addr[4], addr[5],
                            (uintmax_t)mask, vniy, vnix, dip_hit ? 'Y' : 'N',
                            port_num, cls_lo & F_T6_SRAM_VLD ? 'Y' : 'N',
                            G_PORTMAP(cls_hi), G_T6_PF(cls_lo),
                            cls_lo & F_T6_VF_VALID ? G_T6_VF(cls_lo) : -1);
                } else {
                        sbuf_printf(sb, "\n%3u %02x:%02x:%02x:%02x:%02x:%02x "
                            "%012jx    -       -   ", i, addr[0], addr[1],
                            addr[2], addr[3], addr[4], addr[5],
                            (uintmax_t)mask);

                        if (vlan_vld)
                                sbuf_printf(sb, "%4u   Y     ", ivlan);
                        else
                                sbuf_printf(sb, "  -    N     ");

                        sbuf_printf(sb, "-      %3c  %4x   %3c   %#x%4u%4d",
                            lookup_type ? 'I' : 'O', port_num,
                            cls_lo & F_T6_SRAM_VLD ? 'Y' : 'N',
                            G_PORTMAP(cls_hi), G_T6_PF(cls_lo),
                            cls_lo & F_T6_VF_VALID ? G_T6_VF(cls_lo) : -1);
                }


                if (cls_lo & F_T6_REPLICATE) {
                        struct fw_ldst_cmd ldst_cmd;

                        memset(&ldst_cmd, 0, sizeof(ldst_cmd));
                        ldst_cmd.op_to_addrspace =
                            htobe32(V_FW_CMD_OP(FW_LDST_CMD) |
                                F_FW_CMD_REQUEST | F_FW_CMD_READ |
                                V_FW_LDST_CMD_ADDRSPACE(FW_LDST_ADDRSPC_MPS));
                        ldst_cmd.cycles_to_len16 = htobe32(FW_LEN16(ldst_cmd));
                        ldst_cmd.u.mps.rplc.fid_idx =
                            htobe16(V_FW_LDST_CMD_FID(FW_LDST_MPS_RPLC) |
                                V_FW_LDST_CMD_IDX(i));

                        rc = begin_synchronized_op(sc, NULL, SLEEP_OK | INTR_OK,
                            "t6mps");
                        if (rc)
                                break;
                        if (hw_off_limits(sc))
                                rc = ENXIO;
                        else
                                rc = -t4_wr_mbox(sc, sc->mbox, &ldst_cmd,
                                    sizeof(ldst_cmd), &ldst_cmd);
                        end_synchronized_op(sc, 0);
                        if (rc != 0)
                                break;
                        else {
                                sbuf_printf(sb, " %08x %08x %08x %08x"
                                    " %08x %08x %08x %08x",
                                    be32toh(ldst_cmd.u.mps.rplc.rplc255_224),
                                    be32toh(ldst_cmd.u.mps.rplc.rplc223_192),
                                    be32toh(ldst_cmd.u.mps.rplc.rplc191_160),
                                    be32toh(ldst_cmd.u.mps.rplc.rplc159_128),
                                    be32toh(ldst_cmd.u.mps.rplc.rplc127_96),
                                    be32toh(ldst_cmd.u.mps.rplc.rplc95_64),
                                    be32toh(ldst_cmd.u.mps.rplc.rplc63_32),
                                    be32toh(ldst_cmd.u.mps.rplc.rplc31_0));
                        }
                } else
                        sbuf_printf(sb, "%72s", "");

                sbuf_printf(sb, "%4u%3u%3u%3u %#x",
                    G_T6_SRAM_PRIO0(cls_lo), G_T6_SRAM_PRIO1(cls_lo),
                    G_T6_SRAM_PRIO2(cls_lo), G_T6_SRAM_PRIO3(cls_lo),
                    (cls_lo >> S_T6_MULTILISTEN0) & 0xf);
        }

        if (rc)
                (void) sbuf_finish(sb);
        else
                rc = sbuf_finish(sb);
        sbuf_delete(sb);

        return (rc);
}

static int
sysctl_path_mtus(SYSCTL_HANDLER_ARGS)
{
        struct adapter *sc = arg1;
        struct sbuf *sb;
        int rc;
        uint16_t mtus[NMTUS];

        rc = sysctl_wire_old_buffer(req, 0);
        if (rc != 0)
                return (rc);

        mtx_lock(&sc->reg_lock);
        if (hw_off_limits(sc))
                rc = ENXIO;
        else
                t4_read_mtu_tbl(sc, mtus, NULL);
        mtx_unlock(&sc->reg_lock);
        if (rc != 0)
                return (rc);

        sb = sbuf_new_for_sysctl(NULL, NULL, 256, req);
        if (sb == NULL)
                return (ENOMEM);

        sbuf_printf(sb, "%u %u %u %u %u %u %u %u %u %u %u %u %u %u %u %u",
            mtus[0], mtus[1], mtus[2], mtus[3], mtus[4], mtus[5], mtus[6],
            mtus[7], mtus[8], mtus[9], mtus[10], mtus[11], mtus[12], mtus[13],
            mtus[14], mtus[15]);

        rc = sbuf_finish(sb);
        sbuf_delete(sb);

        return (rc);
}

static int
sysctl_pm_stats(SYSCTL_HANDLER_ARGS)
{
        struct adapter *sc = arg1;
        struct sbuf *sb;
        int rc, i;
        uint32_t tx_cnt[MAX_PM_NSTATS], rx_cnt[MAX_PM_NSTATS];
        uint64_t tx_cyc[MAX_PM_NSTATS], rx_cyc[MAX_PM_NSTATS];
        static const char *tx_stats[MAX_PM_NSTATS] = {
                "Read:", "Write bypass:", "Write mem:", "Bypass + mem:",
                "Tx FIFO wait", NULL, "Tx latency"
        };
        static const char *rx_stats[MAX_PM_NSTATS] = {
                "Read:", "Write bypass:", "Write mem:", "Flush:",
                "Rx FIFO wait", NULL, "Rx latency"
        };

        rc = sysctl_wire_old_buffer(req, 0);
        if (rc != 0)
                return (rc);

        mtx_lock(&sc->reg_lock);
        if (hw_off_limits(sc))
                rc = ENXIO;
        else {
                t4_pmtx_get_stats(sc, tx_cnt, tx_cyc);
                t4_pmrx_get_stats(sc, rx_cnt, rx_cyc);
        }
        mtx_unlock(&sc->reg_lock);
        if (rc != 0)
                return (rc);

        sb = sbuf_new_for_sysctl(NULL, NULL, 256, req);
        if (sb == NULL)
                return (ENOMEM);

        sbuf_printf(sb, "                Tx pcmds             Tx bytes");
        for (i = 0; i < 4; i++) {
                sbuf_printf(sb, "\n%-13s %10u %20ju", tx_stats[i], tx_cnt[i],
                    tx_cyc[i]);
        }

        sbuf_printf(sb, "\n                Rx pcmds             Rx bytes");
        for (i = 0; i < 4; i++) {
                sbuf_printf(sb, "\n%-13s %10u %20ju", rx_stats[i], rx_cnt[i],
                    rx_cyc[i]);
        }

        if (chip_id(sc) > CHELSIO_T5) {
                sbuf_printf(sb,
                    "\n              Total wait      Total occupancy");
                sbuf_printf(sb, "\n%-13s %10u %20ju", tx_stats[i], tx_cnt[i],
                    tx_cyc[i]);
                sbuf_printf(sb, "\n%-13s %10u %20ju", rx_stats[i], rx_cnt[i],
                    rx_cyc[i]);

                i += 2;
                MPASS(i < nitems(tx_stats));

                sbuf_printf(sb,
                    "\n                   Reads           Total wait");
                sbuf_printf(sb, "\n%-13s %10u %20ju", tx_stats[i], tx_cnt[i],
                    tx_cyc[i]);
                sbuf_printf(sb, "\n%-13s %10u %20ju", rx_stats[i], rx_cnt[i],
                    rx_cyc[i]);
        }

        rc = sbuf_finish(sb);
        sbuf_delete(sb);

        return (rc);
}

static int
sysctl_rdma_stats(SYSCTL_HANDLER_ARGS)
{
        struct adapter *sc = arg1;
        struct sbuf *sb;
        int rc;
        struct tp_rdma_stats stats;

        rc = sysctl_wire_old_buffer(req, 0);
        if (rc != 0)
                return (rc);

        mtx_lock(&sc->reg_lock);
        if (hw_off_limits(sc))
                rc = ENXIO;
        else
                t4_tp_get_rdma_stats(sc, &stats, 0);
        mtx_unlock(&sc->reg_lock);
        if (rc != 0)
                return (rc);

        sb = sbuf_new_for_sysctl(NULL, NULL, 256, req);
        if (sb == NULL)
                return (ENOMEM);

        sbuf_printf(sb, "NoRQEModDefferals: %u\n", stats.rqe_dfr_mod);
        sbuf_printf(sb, "NoRQEPktDefferals: %u", stats.rqe_dfr_pkt);

        rc = sbuf_finish(sb);
        sbuf_delete(sb);

        return (rc);
}

static int
sysctl_tcp_stats(SYSCTL_HANDLER_ARGS)
{
        struct adapter *sc = arg1;
        struct sbuf *sb;
        int rc;
        struct tp_tcp_stats v4, v6;

        rc = sysctl_wire_old_buffer(req, 0);
        if (rc != 0)
                return (rc);

        mtx_lock(&sc->reg_lock);
        if (hw_off_limits(sc))
                rc = ENXIO;
        else
                t4_tp_get_tcp_stats(sc, &v4, &v6, 0);
        mtx_unlock(&sc->reg_lock);
        if (rc != 0)
                return (rc);

        sb = sbuf_new_for_sysctl(NULL, NULL, 256, req);
        if (sb == NULL)
                return (ENOMEM);

        sbuf_printf(sb,
            "                                IP                 IPv6\n");
        sbuf_printf(sb, "OutRsts:      %20u %20u\n",
            v4.tcp_out_rsts, v6.tcp_out_rsts);
        sbuf_printf(sb, "InSegs:       %20ju %20ju\n",
            v4.tcp_in_segs, v6.tcp_in_segs);
        sbuf_printf(sb, "OutSegs:      %20ju %20ju\n",
            v4.tcp_out_segs, v6.tcp_out_segs);
        sbuf_printf(sb, "RetransSegs:  %20ju %20ju",
            v4.tcp_retrans_segs, v6.tcp_retrans_segs);

        rc = sbuf_finish(sb);
        sbuf_delete(sb);

        return (rc);
}

static int
sysctl_tids(SYSCTL_HANDLER_ARGS)
{
        struct adapter *sc = arg1;
        struct sbuf *sb;
        int rc;
        uint32_t x, y;
        struct tid_info *t = &sc->tids;

        rc = sysctl_wire_old_buffer(req, 0);
        if (rc != 0)
                return (rc);

        sb = sbuf_new_for_sysctl(NULL, NULL, 256, req);
        if (sb == NULL)
                return (ENOMEM);

        if (t->natids) {
                sbuf_printf(sb, "ATID range: 0-%u, in use: %u\n", t->natids - 1,
                    t->atids_in_use);
        }

        if (t->nhpftids) {
                sbuf_printf(sb, "HPFTID range: %u-%u, in use: %u\n",
                    t->hpftid_base, t->hpftid_end, t->hpftids_in_use);
        }

        if (t->ntids) {
                bool hashen = false;

                mtx_lock(&sc->reg_lock);
                if (hw_off_limits(sc))
                        rc = ENXIO;
                else if (t4_read_reg(sc, A_LE_DB_CONFIG) & F_HASHEN) {
                        hashen = true;
                        if (chip_id(sc) <= CHELSIO_T5) {
                                x = t4_read_reg(sc, A_LE_DB_SERVER_INDEX) / 4;
                                y = t4_read_reg(sc, A_LE_DB_TID_HASHBASE) / 4;
                        } else {
                                x = t4_read_reg(sc, A_LE_DB_SRVR_START_INDEX);
                                y = t4_read_reg(sc, A_T6_LE_DB_HASH_TID_BASE);
                        }
                }
                mtx_unlock(&sc->reg_lock);
                if (rc != 0)
                        goto done;

                sbuf_printf(sb, "TID range: ");
                if (hashen) {
                        if (x)
                                sbuf_printf(sb, "%u-%u, ", t->tid_base, x - 1);
                        sbuf_printf(sb, "%u-%u", y, t->ntids - 1);
                } else {
                        sbuf_printf(sb, "%u-%u", t->tid_base, t->tid_base +
                            t->ntids - 1);
                }
                sbuf_printf(sb, ", in use: %u\n",
                    atomic_load_acq_int(&t->tids_in_use));
        }

        if (t->nstids) {
                sbuf_printf(sb, "STID range: %u-%u, in use: %u\n", t->stid_base,
                    t->stid_base + t->nstids - 1, t->stids_in_use);
        }

        if (t->nftids) {
                sbuf_printf(sb, "FTID range: %u-%u, in use: %u\n", t->ftid_base,
                    t->ftid_end, t->ftids_in_use);
        }

        if (t->netids) {
                sbuf_printf(sb, "ETID range: %u-%u, in use: %u\n", t->etid_base,
                    t->etid_base + t->netids - 1, t->etids_in_use);
        }

        mtx_lock(&sc->reg_lock);
        if (hw_off_limits(sc))
                rc = ENXIO;
        else {
                x = t4_read_reg(sc, A_LE_DB_ACT_CNT_IPV4);
                y = t4_read_reg(sc, A_LE_DB_ACT_CNT_IPV6);
        }
        mtx_unlock(&sc->reg_lock);
        if (rc != 0)
                goto done;
        sbuf_printf(sb, "HW TID usage: %u IP users, %u IPv6 users", x, y);
done:
        if (rc == 0)
                rc = sbuf_finish(sb);
        else
                (void)sbuf_finish(sb);
        sbuf_delete(sb);

        return (rc);
}

static int
sysctl_tp_err_stats(SYSCTL_HANDLER_ARGS)
{
        struct adapter *sc = arg1;
        struct sbuf *sb;
        int rc;
        struct tp_err_stats stats;

        rc = sysctl_wire_old_buffer(req, 0);
        if (rc != 0)
                return (rc);

        mtx_lock(&sc->reg_lock);
        if (hw_off_limits(sc))
                rc = ENXIO;
        else
                t4_tp_get_err_stats(sc, &stats, 0);
        mtx_unlock(&sc->reg_lock);
        if (rc != 0)
                return (rc);

        sb = sbuf_new_for_sysctl(NULL, NULL, 256, req);
        if (sb == NULL)
                return (ENOMEM);

        if (sc->chip_params->nchan > 2) {
                sbuf_printf(sb, "                 channel 0  channel 1"
                    "  channel 2  channel 3\n");
                sbuf_printf(sb, "macInErrs:      %10u %10u %10u %10u\n",
                    stats.mac_in_errs[0], stats.mac_in_errs[1],
                    stats.mac_in_errs[2], stats.mac_in_errs[3]);
                sbuf_printf(sb, "hdrInErrs:      %10u %10u %10u %10u\n",
                    stats.hdr_in_errs[0], stats.hdr_in_errs[1],
                    stats.hdr_in_errs[2], stats.hdr_in_errs[3]);
                sbuf_printf(sb, "tcpInErrs:      %10u %10u %10u %10u\n",
                    stats.tcp_in_errs[0], stats.tcp_in_errs[1],
                    stats.tcp_in_errs[2], stats.tcp_in_errs[3]);
                sbuf_printf(sb, "tcp6InErrs:     %10u %10u %10u %10u\n",
                    stats.tcp6_in_errs[0], stats.tcp6_in_errs[1],
                    stats.tcp6_in_errs[2], stats.tcp6_in_errs[3]);
                sbuf_printf(sb, "tnlCongDrops:   %10u %10u %10u %10u\n",
                    stats.tnl_cong_drops[0], stats.tnl_cong_drops[1],
                    stats.tnl_cong_drops[2], stats.tnl_cong_drops[3]);
                sbuf_printf(sb, "tnlTxDrops:     %10u %10u %10u %10u\n",
                    stats.tnl_tx_drops[0], stats.tnl_tx_drops[1],
                    stats.tnl_tx_drops[2], stats.tnl_tx_drops[3]);
                sbuf_printf(sb, "ofldVlanDrops:  %10u %10u %10u %10u\n",
                    stats.ofld_vlan_drops[0], stats.ofld_vlan_drops[1],
                    stats.ofld_vlan_drops[2], stats.ofld_vlan_drops[3]);
                sbuf_printf(sb, "ofldChanDrops:  %10u %10u %10u %10u\n\n",
                    stats.ofld_chan_drops[0], stats.ofld_chan_drops[1],
                    stats.ofld_chan_drops[2], stats.ofld_chan_drops[3]);
        } else {
                sbuf_printf(sb, "                 channel 0  channel 1\n");
                sbuf_printf(sb, "macInErrs:      %10u %10u\n",
                    stats.mac_in_errs[0], stats.mac_in_errs[1]);
                sbuf_printf(sb, "hdrInErrs:      %10u %10u\n",
                    stats.hdr_in_errs[0], stats.hdr_in_errs[1]);
                sbuf_printf(sb, "tcpInErrs:      %10u %10u\n",
                    stats.tcp_in_errs[0], stats.tcp_in_errs[1]);
                sbuf_printf(sb, "tcp6InErrs:     %10u %10u\n",
                    stats.tcp6_in_errs[0], stats.tcp6_in_errs[1]);
                sbuf_printf(sb, "tnlCongDrops:   %10u %10u\n",
                    stats.tnl_cong_drops[0], stats.tnl_cong_drops[1]);
                sbuf_printf(sb, "tnlTxDrops:     %10u %10u\n",
                    stats.tnl_tx_drops[0], stats.tnl_tx_drops[1]);
                sbuf_printf(sb, "ofldVlanDrops:  %10u %10u\n",
                    stats.ofld_vlan_drops[0], stats.ofld_vlan_drops[1]);
                sbuf_printf(sb, "ofldChanDrops:  %10u %10u\n\n",
                    stats.ofld_chan_drops[0], stats.ofld_chan_drops[1]);
        }

        sbuf_printf(sb, "ofldNoNeigh:    %u\nofldCongDefer:  %u",
            stats.ofld_no_neigh, stats.ofld_cong_defer);

        rc = sbuf_finish(sb);
        sbuf_delete(sb);

        return (rc);
}

static int
sysctl_tnl_stats(SYSCTL_HANDLER_ARGS)
{
        struct adapter *sc = arg1;
        struct sbuf *sb;
        int rc;
        struct tp_tnl_stats stats;

        rc = sysctl_wire_old_buffer(req, 0);
        if (rc != 0)
                return(rc);

        mtx_lock(&sc->reg_lock);
        if (hw_off_limits(sc))
                rc = ENXIO;
        else
                t4_tp_get_tnl_stats(sc, &stats, 1);
        mtx_unlock(&sc->reg_lock);
        if (rc != 0)
                return (rc);

        sb = sbuf_new_for_sysctl(NULL, NULL, 256, req);
        if (sb == NULL)
                return (ENOMEM);

        if (sc->chip_params->nchan > 2) {
                sbuf_printf(sb, "           channel 0  channel 1"
                    "  channel 2  channel 3\n");
                sbuf_printf(sb, "OutPkts:  %10u %10u %10u %10u\n",
                    stats.out_pkt[0], stats.out_pkt[1],
                    stats.out_pkt[2], stats.out_pkt[3]);
                sbuf_printf(sb, "InPkts:   %10u %10u %10u %10u",
                    stats.in_pkt[0], stats.in_pkt[1],
                    stats.in_pkt[2], stats.in_pkt[3]);
        } else {
                sbuf_printf(sb, "           channel 0  channel 1\n");
                sbuf_printf(sb, "OutPkts:  %10u %10u\n",
                    stats.out_pkt[0], stats.out_pkt[1]);
                sbuf_printf(sb, "InPkts:   %10u %10u",
                    stats.in_pkt[0], stats.in_pkt[1]);
        }

        rc = sbuf_finish(sb);
        sbuf_delete(sb);

        return (rc);
}

static int
sysctl_tp_la_mask(SYSCTL_HANDLER_ARGS)
{
        struct adapter *sc = arg1;
        struct tp_params *tpp = &sc->params.tp;
        u_int mask;
        int rc;

        mask = tpp->la_mask >> 16;
        rc = sysctl_handle_int(oidp, &mask, 0, req);
        if (rc != 0 || req->newptr == NULL)
                return (rc);
        if (mask > 0xffff)
                return (EINVAL);
        mtx_lock(&sc->reg_lock);
        if (hw_off_limits(sc))
                rc = ENXIO;
        else {
                tpp->la_mask = mask << 16;
                t4_set_reg_field(sc, A_TP_DBG_LA_CONFIG, 0xffff0000U,
                    tpp->la_mask);
        }
        mtx_unlock(&sc->reg_lock);

        return (rc);
}

struct field_desc {
        const char *name;
        u_int start;
        u_int width;
};

static void
field_desc_show(struct sbuf *sb, uint64_t v, const struct field_desc *f)
{
        char buf[32];
        int line_size = 0;

        while (f->name) {
                uint64_t mask = (1ULL << f->width) - 1;
                int len = snprintf(buf, sizeof(buf), "%s: %ju", f->name,
                    ((uintmax_t)v >> f->start) & mask);

                if (line_size + len >= 79) {
                        line_size = 8;
                        sbuf_printf(sb, "\n        ");
                }
                sbuf_printf(sb, "%s ", buf);
                line_size += len + 1;
                f++;
        }
        sbuf_printf(sb, "\n");
}

static const struct field_desc tp_la0[] = {
        { "RcfOpCodeOut", 60, 4 },
        { "State", 56, 4 },
        { "WcfState", 52, 4 },
        { "RcfOpcSrcOut", 50, 2 },
        { "CRxError", 49, 1 },
        { "ERxError", 48, 1 },
        { "SanityFailed", 47, 1 },
        { "SpuriousMsg", 46, 1 },
        { "FlushInputMsg", 45, 1 },
        { "FlushInputCpl", 44, 1 },
        { "RssUpBit", 43, 1 },
        { "RssFilterHit", 42, 1 },
        { "Tid", 32, 10 },
        { "InitTcb", 31, 1 },
        { "LineNumber", 24, 7 },
        { "Emsg", 23, 1 },
        { "EdataOut", 22, 1 },
        { "Cmsg", 21, 1 },
        { "CdataOut", 20, 1 },
        { "EreadPdu", 19, 1 },
        { "CreadPdu", 18, 1 },
        { "TunnelPkt", 17, 1 },
        { "RcfPeerFin", 16, 1 },
        { "RcfReasonOut", 12, 4 },
        { "TxCchannel", 10, 2 },
        { "RcfTxChannel", 8, 2 },
        { "RxEchannel", 6, 2 },
        { "RcfRxChannel", 5, 1 },
        { "RcfDataOutSrdy", 4, 1 },
        { "RxDvld", 3, 1 },
        { "RxOoDvld", 2, 1 },
        { "RxCongestion", 1, 1 },
        { "TxCongestion", 0, 1 },
        { NULL }
};

static const struct field_desc tp_la1[] = {
        { "CplCmdIn", 56, 8 },
        { "CplCmdOut", 48, 8 },
        { "ESynOut", 47, 1 },
        { "EAckOut", 46, 1 },
        { "EFinOut", 45, 1 },
        { "ERstOut", 44, 1 },
        { "SynIn", 43, 1 },
        { "AckIn", 42, 1 },
        { "FinIn", 41, 1 },
        { "RstIn", 40, 1 },
        { "DataIn", 39, 1 },
        { "DataInVld", 38, 1 },
        { "PadIn", 37, 1 },
        { "RxBufEmpty", 36, 1 },
        { "RxDdp", 35, 1 },
        { "RxFbCongestion", 34, 1 },
        { "TxFbCongestion", 33, 1 },
        { "TxPktSumSrdy", 32, 1 },
        { "RcfUlpType", 28, 4 },
        { "Eread", 27, 1 },
        { "Ebypass", 26, 1 },
        { "Esave", 25, 1 },
        { "Static0", 24, 1 },
        { "Cread", 23, 1 },
        { "Cbypass", 22, 1 },
        { "Csave", 21, 1 },
        { "CPktOut", 20, 1 },
        { "RxPagePoolFull", 18, 2 },
        { "RxLpbkPkt", 17, 1 },
        { "TxLpbkPkt", 16, 1 },
        { "RxVfValid", 15, 1 },
        { "SynLearned", 14, 1 },
        { "SetDelEntry", 13, 1 },
        { "SetInvEntry", 12, 1 },
        { "CpcmdDvld", 11, 1 },
        { "CpcmdSave", 10, 1 },
        { "RxPstructsFull", 8, 2 },
        { "EpcmdDvld", 7, 1 },
        { "EpcmdFlush", 6, 1 },
        { "EpcmdTrimPrefix", 5, 1 },
        { "EpcmdTrimPostfix", 4, 1 },
        { "ERssIp4Pkt", 3, 1 },
        { "ERssIp6Pkt", 2, 1 },
        { "ERssTcpUdpPkt", 1, 1 },
        { "ERssFceFipPkt", 0, 1 },
        { NULL }
};

static const struct field_desc tp_la2[] = {
        { "CplCmdIn", 56, 8 },
        { "MpsVfVld", 55, 1 },
        { "MpsPf", 52, 3 },
        { "MpsVf", 44, 8 },
        { "SynIn", 43, 1 },
        { "AckIn", 42, 1 },
        { "FinIn", 41, 1 },
        { "RstIn", 40, 1 },
        { "DataIn", 39, 1 },
        { "DataInVld", 38, 1 },
        { "PadIn", 37, 1 },
        { "RxBufEmpty", 36, 1 },
        { "RxDdp", 35, 1 },
        { "RxFbCongestion", 34, 1 },
        { "TxFbCongestion", 33, 1 },
        { "TxPktSumSrdy", 32, 1 },
        { "RcfUlpType", 28, 4 },
        { "Eread", 27, 1 },
        { "Ebypass", 26, 1 },
        { "Esave", 25, 1 },
        { "Static0", 24, 1 },
        { "Cread", 23, 1 },
        { "Cbypass", 22, 1 },
        { "Csave", 21, 1 },
        { "CPktOut", 20, 1 },
        { "RxPagePoolFull", 18, 2 },
        { "RxLpbkPkt", 17, 1 },
        { "TxLpbkPkt", 16, 1 },
        { "RxVfValid", 15, 1 },
        { "SynLearned", 14, 1 },
        { "SetDelEntry", 13, 1 },
        { "SetInvEntry", 12, 1 },
        { "CpcmdDvld", 11, 1 },
        { "CpcmdSave", 10, 1 },
        { "RxPstructsFull", 8, 2 },
        { "EpcmdDvld", 7, 1 },
        { "EpcmdFlush", 6, 1 },
        { "EpcmdTrimPrefix", 5, 1 },
        { "EpcmdTrimPostfix", 4, 1 },
        { "ERssIp4Pkt", 3, 1 },
        { "ERssIp6Pkt", 2, 1 },
        { "ERssTcpUdpPkt", 1, 1 },
        { "ERssFceFipPkt", 0, 1 },
        { NULL }
};

static void
tp_la_show(struct sbuf *sb, uint64_t *p, int idx)
{

        field_desc_show(sb, *p, tp_la0);
}

static void
tp_la_show2(struct sbuf *sb, uint64_t *p, int idx)
{

        if (idx)
                sbuf_printf(sb, "\n");
        field_desc_show(sb, p[0], tp_la0);
        if (idx < (TPLA_SIZE / 2 - 1) || p[1] != ~0ULL)
                field_desc_show(sb, p[1], tp_la0);
}

static void
tp_la_show3(struct sbuf *sb, uint64_t *p, int idx)
{

        if (idx)
                sbuf_printf(sb, "\n");
        field_desc_show(sb, p[0], tp_la0);
        if (idx < (TPLA_SIZE / 2 - 1) || p[1] != ~0ULL)
                field_desc_show(sb, p[1], (p[0] & (1 << 17)) ? tp_la2 : tp_la1);
}

static int
sysctl_tp_la(SYSCTL_HANDLER_ARGS)
{
        struct adapter *sc = arg1;
        struct sbuf *sb;
        uint64_t *buf, *p;
        int rc;
        u_int i, inc;
        void (*show_func)(struct sbuf *, uint64_t *, int);

        rc = sysctl_wire_old_buffer(req, 0);
        if (rc != 0)
                return (rc);

        sb = sbuf_new_for_sysctl(NULL, NULL, 4096, req);
        if (sb == NULL)
                return (ENOMEM);

        buf = malloc(TPLA_SIZE * sizeof(uint64_t), M_CXGBE, M_ZERO | M_WAITOK);

        mtx_lock(&sc->reg_lock);
        if (hw_off_limits(sc))
                rc = ENXIO;
        else {
                t4_tp_read_la(sc, buf, NULL);
                switch (G_DBGLAMODE(t4_read_reg(sc, A_TP_DBG_LA_CONFIG))) {
                case 2:
                        inc = 2;
                        show_func = tp_la_show2;
                        break;
                case 3:
                        inc = 2;
                        show_func = tp_la_show3;
                        break;
                default:
                        inc = 1;
                        show_func = tp_la_show;
                }
        }
        mtx_unlock(&sc->reg_lock);
        if (rc != 0)
                goto done;

        p = buf;
        for (i = 0; i < TPLA_SIZE / inc; i++, p += inc)
                (*show_func)(sb, p, i);
        rc = sbuf_finish(sb);
done:
        sbuf_delete(sb);
        free(buf, M_CXGBE);
        return (rc);
}

static int
sysctl_tx_rate(SYSCTL_HANDLER_ARGS)
{
        struct adapter *sc = arg1;
        struct sbuf *sb;
        int rc;
        u64 nrate[MAX_NCHAN], orate[MAX_NCHAN];

        rc = sysctl_wire_old_buffer(req, 0);
        if (rc != 0)
                return (rc);

        mtx_lock(&sc->reg_lock);
        if (hw_off_limits(sc))
                rc = ENXIO;
        else
                t4_get_chan_txrate(sc, nrate, orate);
        mtx_unlock(&sc->reg_lock);
        if (rc != 0)
                return (rc);

        sb = sbuf_new_for_sysctl(NULL, NULL, 256, req);
        if (sb == NULL)
                return (ENOMEM);

        if (sc->chip_params->nchan > 2) {
                sbuf_printf(sb, "              channel 0   channel 1"
                    "   channel 2   channel 3\n");
                sbuf_printf(sb, "NIC B/s:     %10ju  %10ju  %10ju  %10ju\n",
                    nrate[0], nrate[1], nrate[2], nrate[3]);
                sbuf_printf(sb, "Offload B/s: %10ju  %10ju  %10ju  %10ju",
                    orate[0], orate[1], orate[2], orate[3]);
        } else {
                sbuf_printf(sb, "              channel 0   channel 1\n");
                sbuf_printf(sb, "NIC B/s:     %10ju  %10ju\n",
                    nrate[0], nrate[1]);
                sbuf_printf(sb, "Offload B/s: %10ju  %10ju",
                    orate[0], orate[1]);
        }

        rc = sbuf_finish(sb);
        sbuf_delete(sb);

        return (rc);
}

static int
sysctl_ulprx_la(SYSCTL_HANDLER_ARGS)
{
        struct adapter *sc = arg1;
        struct sbuf *sb;
        uint32_t *buf, *p;
        int rc, i;

        rc = sysctl_wire_old_buffer(req, 0);
        if (rc != 0)
                return (rc);

        sb = sbuf_new_for_sysctl(NULL, NULL, 4096, req);
        if (sb == NULL)
                return (ENOMEM);

        buf = malloc(ULPRX_LA_SIZE * 8 * sizeof(uint32_t), M_CXGBE,
            M_ZERO | M_WAITOK);

        mtx_lock(&sc->reg_lock);
        if (hw_off_limits(sc))
                rc = ENXIO;
        else
                t4_ulprx_read_la(sc, buf);
        mtx_unlock(&sc->reg_lock);
        if (rc != 0)
                goto done;

        p = buf;
        sbuf_printf(sb, "      Pcmd        Type   Message"
            "                Data");
        for (i = 0; i < ULPRX_LA_SIZE; i++, p += 8) {
                sbuf_printf(sb, "\n%08x%08x  %4x  %08x  %08x%08x%08x%08x",
                    p[1], p[0], p[2], p[3], p[7], p[6], p[5], p[4]);
        }
        rc = sbuf_finish(sb);
done:
        sbuf_delete(sb);
        free(buf, M_CXGBE);
        return (rc);
}

static int
sysctl_wcwr_stats(SYSCTL_HANDLER_ARGS)
{
        struct adapter *sc = arg1;
        struct sbuf *sb;
        int rc;
        uint32_t cfg, s1, s2;

        MPASS(chip_id(sc) >= CHELSIO_T5);

        rc = sysctl_wire_old_buffer(req, 0);
        if (rc != 0)
                return (rc);

        mtx_lock(&sc->reg_lock);
        if (hw_off_limits(sc))
                rc = ENXIO;
        else {
                cfg = t4_read_reg(sc, A_SGE_STAT_CFG);
                s1 = t4_read_reg(sc, A_SGE_STAT_TOTAL);
                s2 = t4_read_reg(sc, A_SGE_STAT_MATCH);
        }
        mtx_unlock(&sc->reg_lock);
        if (rc != 0)
                return (rc);

        sb = sbuf_new_for_sysctl(NULL, NULL, 4096, req);
        if (sb == NULL)
                return (ENOMEM);

        if (G_STATSOURCE_T5(cfg) == 7) {
                int mode;

                mode = is_t5(sc) ? G_STATMODE(cfg) : G_T6_STATMODE(cfg);
                if (mode == 0)
                        sbuf_printf(sb, "total %d, incomplete %d", s1, s2);
                else if (mode == 1)
                        sbuf_printf(sb, "total %d, data overflow %d", s1, s2);
                else
                        sbuf_printf(sb, "unknown mode %d", mode);
        }
        rc = sbuf_finish(sb);
        sbuf_delete(sb);

        return (rc);
}

static int
sysctl_cpus(SYSCTL_HANDLER_ARGS)
{
        struct adapter *sc = arg1;
        enum cpu_sets op = arg2;
        cpuset_t cpuset;
        struct sbuf *sb;
        int i, rc;

        MPASS(op == LOCAL_CPUS || op == INTR_CPUS);

        CPU_ZERO(&cpuset);
        rc = bus_get_cpus(sc->dev, op, sizeof(cpuset), &cpuset);
        if (rc != 0)
                return (rc);

        rc = sysctl_wire_old_buffer(req, 0);
        if (rc != 0)
                return (rc);

        sb = sbuf_new_for_sysctl(NULL, NULL, 4096, req);
        if (sb == NULL)
                return (ENOMEM);

        CPU_FOREACH(i)
                sbuf_printf(sb, "%d ", i);
        rc = sbuf_finish(sb);
        sbuf_delete(sb);

        return (rc);
}

static int
sysctl_reset(SYSCTL_HANDLER_ARGS)
{
        struct adapter *sc = arg1;
        u_int val;
        int rc;

        val = sc->num_resets;
        rc = sysctl_handle_int(oidp, &val, 0, req);
        if (rc != 0 || req->newptr == NULL)
                return (rc);

        if (val == 0) {
                /* Zero out the counter that tracks reset. */
                sc->num_resets = 0;
                return (0);
        }

        if (val != 1)
                return (EINVAL);        /* 0 or 1 are the only legal values */

        if (hw_off_limits(sc))          /* harmless race */
                return (EALREADY);

        taskqueue_enqueue(reset_tq, &sc->reset_task);
        return (0);
}

#ifdef TCP_OFFLOAD
static int
sysctl_tls(SYSCTL_HANDLER_ARGS)
{
        struct adapter *sc = arg1;
        int i, j, v, rc;
        struct vi_info *vi;

        v = sc->tt.tls;
        rc = sysctl_handle_int(oidp, &v, 0, req);
        if (rc != 0 || req->newptr == NULL)
                return (rc);

        if (v != 0 && !(sc->cryptocaps & FW_CAPS_CONFIG_TLSKEYS))
                return (ENOTSUP);

        rc = begin_synchronized_op(sc, NULL, SLEEP_OK | INTR_OK, "t4stls");
        if (rc)
                return (rc);
        if (hw_off_limits(sc))
                rc = ENXIO;
        else {
                sc->tt.tls = !!v;
                for_each_port(sc, i) {
                        for_each_vi(sc->port[i], j, vi) {
                                if (vi->flags & VI_INIT_DONE)
                                        t4_update_fl_bufsize(vi->ifp);
                        }
                }
        }
        end_synchronized_op(sc, 0);

        return (rc);

}

static int
sysctl_tls_rx_ports(SYSCTL_HANDLER_ARGS)
{
        struct adapter *sc = arg1;
        int *old_ports, *new_ports;
        int i, new_count, rc;

        if (req->newptr == NULL && req->oldptr == NULL)
                return (SYSCTL_OUT(req, NULL, imax(sc->tt.num_tls_rx_ports, 1) *
                    sizeof(sc->tt.tls_rx_ports[0])));

        rc = begin_synchronized_op(sc, NULL, SLEEP_OK | INTR_OK, "t4tlsrx");
        if (rc)
                return (rc);

        if (hw_off_limits(sc)) {
                rc = ENXIO;
                goto done;
        }

        if (sc->tt.num_tls_rx_ports == 0) {
                i = -1;
                rc = SYSCTL_OUT(req, &i, sizeof(i));
        } else
                rc = SYSCTL_OUT(req, sc->tt.tls_rx_ports,
                    sc->tt.num_tls_rx_ports * sizeof(sc->tt.tls_rx_ports[0]));
        if (rc == 0 && req->newptr != NULL) {
                new_count = req->newlen / sizeof(new_ports[0]);
                new_ports = malloc(new_count * sizeof(new_ports[0]), M_CXGBE,
                    M_WAITOK);
                rc = SYSCTL_IN(req, new_ports, new_count *
                    sizeof(new_ports[0]));
                if (rc)
                        goto err;

                /* Allow setting to a single '-1' to clear the list. */
                if (new_count == 1 && new_ports[0] == -1) {
                        ADAPTER_LOCK(sc);
                        old_ports = sc->tt.tls_rx_ports;
                        sc->tt.tls_rx_ports = NULL;
                        sc->tt.num_tls_rx_ports = 0;
                        ADAPTER_UNLOCK(sc);
                        free(old_ports, M_CXGBE);
                } else {
                        for (i = 0; i < new_count; i++) {
                                if (new_ports[i] < 1 ||
                                    new_ports[i] > IPPORT_MAX) {
                                        rc = EINVAL;
                                        goto err;
                                }
                        }

                        ADAPTER_LOCK(sc);
                        old_ports = sc->tt.tls_rx_ports;
                        sc->tt.tls_rx_ports = new_ports;
                        sc->tt.num_tls_rx_ports = new_count;
                        ADAPTER_UNLOCK(sc);
                        free(old_ports, M_CXGBE);
                        new_ports = NULL;
                }
        err:
                free(new_ports, M_CXGBE);
        }
done:
        end_synchronized_op(sc, 0);
        return (rc);
}

static int
sysctl_tls_rx_timeout(SYSCTL_HANDLER_ARGS)
{
        struct adapter *sc = arg1;
        int v, rc;

        v = sc->tt.tls_rx_timeout;
        rc = sysctl_handle_int(oidp, &v, 0, req);
        if (rc != 0 || req->newptr == NULL)
                return (rc);

        if (v < 0)
                return (EINVAL);

        if (v != 0 && !(sc->cryptocaps & FW_CAPS_CONFIG_TLSKEYS))
                return (ENOTSUP);

        sc->tt.tls_rx_timeout = v;

        return (0);

}

static void
unit_conv(char *buf, size_t len, u_int val, u_int factor)
{
        u_int rem = val % factor;

        if (rem == 0)
                snprintf(buf, len, "%u", val / factor);
        else {
                while (rem % 10 == 0)
                        rem /= 10;
                snprintf(buf, len, "%u.%u", val / factor, rem);
        }
}

static int
sysctl_tp_tick(SYSCTL_HANDLER_ARGS)
{
        struct adapter *sc = arg1;
        char buf[16];
        u_int res, re;
        u_int cclk_ps = 1000000000 / sc->params.vpd.cclk;

        mtx_lock(&sc->reg_lock);
        if (hw_off_limits(sc))
                res = (u_int)-1;
        else
                res = t4_read_reg(sc, A_TP_TIMER_RESOLUTION);
        mtx_unlock(&sc->reg_lock);
        if (res == (u_int)-1)
                return (ENXIO);

        switch (arg2) {
        case 0:
                /* timer_tick */
                re = G_TIMERRESOLUTION(res);
                break;
        case 1:
                /* TCP timestamp tick */
                re = G_TIMESTAMPRESOLUTION(res);
                break;
        case 2:
                /* DACK tick */
                re = G_DELAYEDACKRESOLUTION(res);
                break;
        default:
                return (EDOOFUS);
        }

        unit_conv(buf, sizeof(buf), (cclk_ps << re), 1000000);

        return (sysctl_handle_string(oidp, buf, sizeof(buf), req));
}

static int
sysctl_tp_dack_timer(SYSCTL_HANDLER_ARGS)
{
        struct adapter *sc = arg1;
        int rc;
        u_int dack_tmr, dack_re, v;
        u_int cclk_ps = 1000000000 / sc->params.vpd.cclk;

        mtx_lock(&sc->reg_lock);
        if (hw_off_limits(sc))
                rc = ENXIO;
        else {
                rc = 0;
                dack_re = G_DELAYEDACKRESOLUTION(t4_read_reg(sc,
                    A_TP_TIMER_RESOLUTION));
                dack_tmr = t4_read_reg(sc, A_TP_DACK_TIMER);
        }
        mtx_unlock(&sc->reg_lock);
        if (rc != 0)
                return (rc);

        v = ((cclk_ps << dack_re) / 1000000) * dack_tmr;

        return (sysctl_handle_int(oidp, &v, 0, req));
}

static int
sysctl_tp_timer(SYSCTL_HANDLER_ARGS)
{
        struct adapter *sc = arg1;
        int rc, reg = arg2;
        u_int tre;
        u_long tp_tick_us, v;
        u_int cclk_ps = 1000000000 / sc->params.vpd.cclk;

        MPASS(reg == A_TP_RXT_MIN || reg == A_TP_RXT_MAX ||
            reg == A_TP_PERS_MIN  || reg == A_TP_PERS_MAX ||
            reg == A_TP_KEEP_IDLE || reg == A_TP_KEEP_INTVL ||
            reg == A_TP_INIT_SRTT || reg == A_TP_FINWAIT2_TIMER);

        mtx_lock(&sc->reg_lock);
        if (hw_off_limits(sc))
                rc = ENXIO;
        else {
                rc = 0;
                tre = G_TIMERRESOLUTION(t4_read_reg(sc, A_TP_TIMER_RESOLUTION));
                tp_tick_us = (cclk_ps << tre) / 1000000;
                if (reg == A_TP_INIT_SRTT)
                        v = tp_tick_us * G_INITSRTT(t4_read_reg(sc, reg));
                else
                        v = tp_tick_us * t4_read_reg(sc, reg);
        }
        mtx_unlock(&sc->reg_lock);
        if (rc != 0)
                return (rc);
        else
                return (sysctl_handle_long(oidp, &v, 0, req));
}

/*
 * All fields in TP_SHIFT_CNT are 4b and the starting location of the field is
 * passed to this function.
 */
static int
sysctl_tp_shift_cnt(SYSCTL_HANDLER_ARGS)
{
        struct adapter *sc = arg1;
        int rc, idx = arg2;
        u_int v;

        MPASS(idx >= 0 && idx <= 24);

        mtx_lock(&sc->reg_lock);
        if (hw_off_limits(sc))
                rc = ENXIO;
        else {
                rc = 0;
                v = (t4_read_reg(sc, A_TP_SHIFT_CNT) >> idx) & 0xf;
        }
        mtx_unlock(&sc->reg_lock);
        if (rc != 0)
                return (rc);
        else
                return (sysctl_handle_int(oidp, &v, 0, req));
}

static int
sysctl_tp_backoff(SYSCTL_HANDLER_ARGS)
{
        struct adapter *sc = arg1;
        int rc, idx = arg2;
        u_int shift, v, r;

        MPASS(idx >= 0 && idx < 16);

        r = A_TP_TCP_BACKOFF_REG0 + (idx & ~3);
        shift = (idx & 3) << 3;
        mtx_lock(&sc->reg_lock);
        if (hw_off_limits(sc))
                rc = ENXIO;
        else {
                rc = 0;
                v = (t4_read_reg(sc, r) >> shift) & M_TIMERBACKOFFINDEX0;
        }
        mtx_unlock(&sc->reg_lock);
        if (rc != 0)
                return (rc);
        else
                return (sysctl_handle_int(oidp, &v, 0, req));
}

static int
sysctl_holdoff_tmr_idx_ofld(SYSCTL_HANDLER_ARGS)
{
        struct vi_info *vi = arg1;
        struct adapter *sc = vi->adapter;
        int idx, rc, i;
        struct sge_ofld_rxq *ofld_rxq;
        uint8_t v;

        idx = vi->ofld_tmr_idx;

        rc = sysctl_handle_int(oidp, &idx, 0, req);
        if (rc != 0 || req->newptr == NULL)
                return (rc);

        if (idx < 0 || idx >= SGE_NTIMERS)
                return (EINVAL);

        rc = begin_synchronized_op(sc, vi, HOLD_LOCK | SLEEP_OK | INTR_OK,
            "t4otmr");
        if (rc)
                return (rc);

        v = V_QINTR_TIMER_IDX(idx) | V_QINTR_CNT_EN(vi->ofld_pktc_idx != -1);
        for_each_ofld_rxq(vi, i, ofld_rxq) {
#ifdef atomic_store_rel_8
                atomic_store_rel_8(&ofld_rxq->iq.intr_params, v);
#else
                ofld_rxq->iq.intr_params = v;
#endif
        }
        vi->ofld_tmr_idx = idx;

        end_synchronized_op(sc, LOCK_HELD);
        return (0);
}

static int
sysctl_holdoff_pktc_idx_ofld(SYSCTL_HANDLER_ARGS)
{
        struct vi_info *vi = arg1;
        struct adapter *sc = vi->adapter;
        int idx, rc;

        idx = vi->ofld_pktc_idx;

        rc = sysctl_handle_int(oidp, &idx, 0, req);
        if (rc != 0 || req->newptr == NULL)
                return (rc);

        if (idx < -1 || idx >= SGE_NCOUNTERS)
                return (EINVAL);

        rc = begin_synchronized_op(sc, vi, HOLD_LOCK | SLEEP_OK | INTR_OK,
            "t4opktc");
        if (rc)
                return (rc);

        if (vi->flags & VI_INIT_DONE)
                rc = EBUSY; /* cannot be changed once the queues are created */
        else
                vi->ofld_pktc_idx = idx;

        end_synchronized_op(sc, LOCK_HELD);
        return (rc);
}
#endif

static int
get_sge_context(struct adapter *sc, struct t4_sge_context *cntxt)
{
        int rc;

        if (cntxt->cid > M_CTXTQID)
                return (EINVAL);

        if (cntxt->mem_id != CTXT_EGRESS && cntxt->mem_id != CTXT_INGRESS &&
            cntxt->mem_id != CTXT_FLM && cntxt->mem_id != CTXT_CNM)
                return (EINVAL);

        rc = begin_synchronized_op(sc, NULL, SLEEP_OK | INTR_OK, "t4ctxt");
        if (rc)
                return (rc);

        if (hw_off_limits(sc)) {
                rc = ENXIO;
                goto done;
        }

        if (sc->flags & FW_OK) {
                rc = -t4_sge_ctxt_rd(sc, sc->mbox, cntxt->cid, cntxt->mem_id,
                    &cntxt->data[0]);
                if (rc == 0)
                        goto done;
        }

        /*
         * Read via firmware failed or wasn't even attempted.  Read directly via
         * the backdoor.
         */
        rc = -t4_sge_ctxt_rd_bd(sc, cntxt->cid, cntxt->mem_id, &cntxt->data[0]);
done:
        end_synchronized_op(sc, 0);
        return (rc);
}

static int
load_fw(struct adapter *sc, struct t4_data *fw)
{
        int rc;
        uint8_t *fw_data;

        rc = begin_synchronized_op(sc, NULL, SLEEP_OK | INTR_OK, "t4ldfw");
        if (rc)
                return (rc);

        if (hw_off_limits(sc)) {
                rc = ENXIO;
                goto done;
        }

        /*
         * The firmware, with the sole exception of the memory parity error
         * handler, runs from memory and not flash.  It is almost always safe to
         * install a new firmware on a running system.  Just set bit 1 in
         * hw.cxgbe.dflags or dev.<nexus>.<n>.dflags first.
         */
        if (sc->flags & FULL_INIT_DONE &&
            (sc->debug_flags & DF_LOAD_FW_ANYTIME) == 0) {
                rc = EBUSY;
                goto done;
        }

        fw_data = malloc(fw->len, M_CXGBE, M_WAITOK);

        rc = copyin(fw->data, fw_data, fw->len);
        if (rc == 0)
                rc = -t4_load_fw(sc, fw_data, fw->len);

        free(fw_data, M_CXGBE);
done:
        end_synchronized_op(sc, 0);
        return (rc);
}

static int
load_cfg(struct adapter *sc, struct t4_data *cfg)
{
        int rc;
        uint8_t *cfg_data = NULL;

        rc = begin_synchronized_op(sc, NULL, SLEEP_OK | INTR_OK, "t4ldcf");
        if (rc)
                return (rc);

        if (hw_off_limits(sc)) {
                rc = ENXIO;
                goto done;
        }

        if (cfg->len == 0) {
                /* clear */
                rc = -t4_load_cfg(sc, NULL, 0);
                goto done;
        }

        cfg_data = malloc(cfg->len, M_CXGBE, M_WAITOK);

        rc = copyin(cfg->data, cfg_data, cfg->len);
        if (rc == 0)
                rc = -t4_load_cfg(sc, cfg_data, cfg->len);

        free(cfg_data, M_CXGBE);
done:
        end_synchronized_op(sc, 0);
        return (rc);
}

static int
load_boot(struct adapter *sc, struct t4_bootrom *br)
{
        int rc;
        uint8_t *br_data = NULL;
        u_int offset;

        if (br->len > 1024 * 1024)
                return (EFBIG);

        if (br->pf_offset == 0) {
                /* pfidx */
                if (br->pfidx_addr > 7)
                        return (EINVAL);
                offset = G_OFFSET(t4_read_reg(sc, PF_REG(br->pfidx_addr,
                    A_PCIE_PF_EXPROM_OFST)));
        } else if (br->pf_offset == 1) {
                /* offset */
                offset = G_OFFSET(br->pfidx_addr);
        } else {
                return (EINVAL);
        }

        rc = begin_synchronized_op(sc, NULL, SLEEP_OK | INTR_OK, "t4ldbr");
        if (rc)
                return (rc);

        if (hw_off_limits(sc)) {
                rc = ENXIO;
                goto done;
        }

        if (br->len == 0) {
                /* clear */
                rc = -t4_load_boot(sc, NULL, offset, 0);
                goto done;
        }

        br_data = malloc(br->len, M_CXGBE, M_WAITOK);

        rc = copyin(br->data, br_data, br->len);
        if (rc == 0)
                rc = -t4_load_boot(sc, br_data, offset, br->len);

        free(br_data, M_CXGBE);
done:
        end_synchronized_op(sc, 0);
        return (rc);
}

static int
load_bootcfg(struct adapter *sc, struct t4_data *bc)
{
        int rc;
        uint8_t *bc_data = NULL;

        rc = begin_synchronized_op(sc, NULL, SLEEP_OK | INTR_OK, "t4ldcf");
        if (rc)
                return (rc);

        if (hw_off_limits(sc)) {
                rc = ENXIO;
                goto done;
        }

        if (bc->len == 0) {
                /* clear */
                rc = -t4_load_bootcfg(sc, NULL, 0);
                goto done;
        }

        bc_data = malloc(bc->len, M_CXGBE, M_WAITOK);

        rc = copyin(bc->data, bc_data, bc->len);
        if (rc == 0)
                rc = -t4_load_bootcfg(sc, bc_data, bc->len);

        free(bc_data, M_CXGBE);
done:
        end_synchronized_op(sc, 0);
        return (rc);
}

static int
cudbg_dump(struct adapter *sc, struct t4_cudbg_dump *dump)
{
        int rc;
        struct cudbg_init *cudbg;
        void *handle, *buf;

        /* buf is large, don't block if no memory is available */
        buf = malloc(dump->len, M_CXGBE, M_NOWAIT | M_ZERO);
        if (buf == NULL)
                return (ENOMEM);

        handle = cudbg_alloc_handle();
        if (handle == NULL) {
                rc = ENOMEM;
                goto done;
        }

        cudbg = cudbg_get_init(handle);
        cudbg->adap = sc;
        cudbg->print = (cudbg_print_cb)printf;

#ifndef notyet
        device_printf(sc->dev, "%s: wr_flash %u, len %u, data %p.\n",
            __func__, dump->wr_flash, dump->len, dump->data);
#endif

        if (dump->wr_flash)
                cudbg->use_flash = 1;
        MPASS(sizeof(cudbg->dbg_bitmap) == sizeof(dump->bitmap));
        memcpy(cudbg->dbg_bitmap, dump->bitmap, sizeof(cudbg->dbg_bitmap));

        rc = cudbg_collect(handle, buf, &dump->len);
        if (rc != 0)
                goto done;

        rc = copyout(buf, dump->data, dump->len);
done:
        cudbg_free_handle(handle);
        free(buf, M_CXGBE);
        return (rc);
}

static void
free_offload_policy(struct t4_offload_policy *op)
{
        struct offload_rule *r;
        int i;

        if (op == NULL)
                return;

        r = &op->rule[0];
        for (i = 0; i < op->nrules; i++, r++) {
                free(r->bpf_prog.bf_insns, M_CXGBE);
        }
        free(op->rule, M_CXGBE);
        free(op, M_CXGBE);
}

static int
set_offload_policy(struct adapter *sc, struct t4_offload_policy *uop)
{
        int i, rc, len;
        struct t4_offload_policy *op, *old;
        struct bpf_program *bf;
        const struct offload_settings *s;
        struct offload_rule *r;
        void *u;

        if (!is_offload(sc))
                return (ENODEV);

        if (uop->nrules == 0) {
                /* Delete installed policies. */
                op = NULL;
                goto set_policy;
        } else if (uop->nrules > 256) { /* arbitrary */
                return (E2BIG);
        }

        /* Copy userspace offload policy to kernel */
        op = malloc(sizeof(*op), M_CXGBE, M_ZERO | M_WAITOK);
        op->nrules = uop->nrules;
        len = op->nrules * sizeof(struct offload_rule);
        op->rule = malloc(len, M_CXGBE, M_ZERO | M_WAITOK);
        rc = copyin(uop->rule, op->rule, len);
        if (rc) {
                free(op->rule, M_CXGBE);
                free(op, M_CXGBE);
                return (rc);
        }

        r = &op->rule[0];
        for (i = 0; i < op->nrules; i++, r++) {

                /* Validate open_type */
                if (r->open_type != OPEN_TYPE_LISTEN &&
                    r->open_type != OPEN_TYPE_ACTIVE &&
                    r->open_type != OPEN_TYPE_PASSIVE &&
                    r->open_type != OPEN_TYPE_DONTCARE) {
error:
                        /*
                         * Rules 0 to i have malloc'd filters that need to be
                         * freed.  Rules i+1 to nrules have userspace pointers
                         * and should be left alone.
                         */
                        op->nrules = i;
                        free_offload_policy(op);
                        return (rc);
                }

                /* Validate settings */
                s = &r->settings;
                if ((s->offload != 0 && s->offload != 1) ||
                    s->cong_algo < -1 || s->cong_algo > CONG_ALG_HIGHSPEED ||
                    s->sched_class < -1 ||
                    s->sched_class >= sc->params.nsched_cls) {
                        rc = EINVAL;
                        goto error;
                }

                bf = &r->bpf_prog;
                u = bf->bf_insns;       /* userspace ptr */
                bf->bf_insns = NULL;
                if (bf->bf_len == 0) {
                        /* legal, matches everything */
                        continue;
                }
                len = bf->bf_len * sizeof(*bf->bf_insns);
                bf->bf_insns = malloc(len, M_CXGBE, M_ZERO | M_WAITOK);
                rc = copyin(u, bf->bf_insns, len);
                if (rc != 0)
                        goto error;

                if (!bpf_validate(bf->bf_insns, bf->bf_len)) {
                        rc = EINVAL;
                        goto error;
                }
        }
set_policy:
        rw_wlock(&sc->policy_lock);
        old = sc->policy;
        sc->policy = op;
        rw_wunlock(&sc->policy_lock);
        free_offload_policy(old);

        return (0);
}

#define MAX_READ_BUF_SIZE (128 * 1024)
static int
read_card_mem(struct adapter *sc, int win, struct t4_mem_range *mr)
{
        uint32_t addr, remaining, n;
        uint32_t *buf;
        int rc;
        uint8_t *dst;

        mtx_lock(&sc->reg_lock);
        if (hw_off_limits(sc))
                rc = ENXIO;
        else
                rc = validate_mem_range(sc, mr->addr, mr->len);
        mtx_unlock(&sc->reg_lock);
        if (rc != 0)
                return (rc);

        buf = malloc(min(mr->len, MAX_READ_BUF_SIZE), M_CXGBE, M_WAITOK);
        addr = mr->addr;
        remaining = mr->len;
        dst = (void *)mr->data;

        while (remaining) {
                n = min(remaining, MAX_READ_BUF_SIZE);
                mtx_lock(&sc->reg_lock);
                if (hw_off_limits(sc))
                        rc = ENXIO;
                else
                        read_via_memwin(sc, 2, addr, buf, n);
                mtx_unlock(&sc->reg_lock);
                if (rc != 0)
                        break;

                rc = copyout(buf, dst, n);
                if (rc != 0)
                        break;

                dst += n;
                remaining -= n;
                addr += n;
        }

        free(buf, M_CXGBE);
        return (rc);
}
#undef MAX_READ_BUF_SIZE

static int
read_i2c(struct adapter *sc, struct t4_i2c_data *i2cd)
{
        int rc;

        if (i2cd->len == 0 || i2cd->port_id >= sc->params.nports)
                return (EINVAL);

        if (i2cd->len > sizeof(i2cd->data))
                return (EFBIG);

        rc = begin_synchronized_op(sc, NULL, SLEEP_OK | INTR_OK, "t4i2crd");
        if (rc)
                return (rc);
        if (hw_off_limits(sc))
                rc = ENXIO;
        else
                rc = -t4_i2c_rd(sc, sc->mbox, i2cd->port_id, i2cd->dev_addr,
                    i2cd->offset, i2cd->len, &i2cd->data[0]);
        end_synchronized_op(sc, 0);

        return (rc);
}

static int
clear_stats(struct adapter *sc, u_int port_id)
{
        int i, v, chan_map;
        struct port_info *pi;
        struct vi_info *vi;
        struct sge_rxq *rxq;
        struct sge_txq *txq;
        struct sge_wrq *wrq;
#if defined(TCP_OFFLOAD) || defined(RATELIMIT)
        struct sge_ofld_txq *ofld_txq;
#endif
#ifdef TCP_OFFLOAD
        struct sge_ofld_rxq *ofld_rxq;
#endif

        if (port_id >= sc->params.nports)
                return (EINVAL);
        pi = sc->port[port_id];
        if (pi == NULL)
                return (EIO);

        mtx_lock(&sc->reg_lock);
        if (!hw_off_limits(sc)) {
                /* MAC stats */
                t4_clr_port_stats(sc, pi->tx_chan);
                if (is_t6(sc)) {
                        if (pi->fcs_reg != -1)
                                pi->fcs_base = t4_read_reg64(sc, pi->fcs_reg);
                        else
                                pi->stats.rx_fcs_err = 0;
                }
                for_each_vi(pi, v, vi) {
                        if (vi->flags & VI_INIT_DONE)
                                t4_clr_vi_stats(sc, vi->vin);
                }
                chan_map = pi->rx_e_chan_map;
                v = 0;  /* reuse */
                while (chan_map) {
                        i = ffs(chan_map) - 1;
                        t4_write_indirect(sc, A_TP_MIB_INDEX, A_TP_MIB_DATA, &v,
                            1, A_TP_MIB_TNL_CNG_DROP_0 + i);
                        chan_map &= ~(1 << i);
                }
        }
        mtx_unlock(&sc->reg_lock);
        pi->tx_parse_error = 0;
        pi->tnl_cong_drops = 0;

        /*
         * Since this command accepts a port, clear stats for
         * all VIs on this port.
         */
        for_each_vi(pi, v, vi) {
                if (vi->flags & VI_INIT_DONE) {

                        for_each_rxq(vi, i, rxq) {
#if defined(INET) || defined(INET6)
                                rxq->lro.lro_queued = 0;
                                rxq->lro.lro_flushed = 0;
#endif
                                rxq->rxcsum = 0;
                                rxq->vlan_extraction = 0;
                                rxq->vxlan_rxcsum = 0;

                                rxq->fl.cl_allocated = 0;
                                rxq->fl.cl_recycled = 0;
                                rxq->fl.cl_fast_recycled = 0;
                        }

                        for_each_txq(vi, i, txq) {
                                txq->txcsum = 0;
                                txq->tso_wrs = 0;
                                txq->vlan_insertion = 0;
                                txq->imm_wrs = 0;
                                txq->sgl_wrs = 0;
                                txq->txpkt_wrs = 0;
                                txq->txpkts0_wrs = 0;
                                txq->txpkts1_wrs = 0;
                                txq->txpkts0_pkts = 0;
                                txq->txpkts1_pkts = 0;
                                txq->txpkts_flush = 0;
                                txq->raw_wrs = 0;
                                txq->vxlan_tso_wrs = 0;
                                txq->vxlan_txcsum = 0;
                                txq->kern_tls_records = 0;
                                txq->kern_tls_short = 0;
                                txq->kern_tls_partial = 0;
                                txq->kern_tls_full = 0;
                                txq->kern_tls_octets = 0;
                                txq->kern_tls_waste = 0;
                                txq->kern_tls_options = 0;
                                txq->kern_tls_header = 0;
                                txq->kern_tls_fin = 0;
                                txq->kern_tls_fin_short = 0;
                                txq->kern_tls_cbc = 0;
                                txq->kern_tls_gcm = 0;
                                mp_ring_reset_stats(txq->r);
                        }

#if defined(TCP_OFFLOAD) || defined(RATELIMIT)
                        for_each_ofld_txq(vi, i, ofld_txq) {
                                ofld_txq->wrq.tx_wrs_direct = 0;
                                ofld_txq->wrq.tx_wrs_copied = 0;
                                counter_u64_zero(ofld_txq->tx_iscsi_pdus);
                                counter_u64_zero(ofld_txq->tx_iscsi_octets);
                                counter_u64_zero(ofld_txq->tx_iscsi_iso_wrs);
                                counter_u64_zero(ofld_txq->tx_toe_tls_records);
                                counter_u64_zero(ofld_txq->tx_toe_tls_octets);
                        }
#endif
#ifdef TCP_OFFLOAD
                        for_each_ofld_rxq(vi, i, ofld_rxq) {
                                ofld_rxq->fl.cl_allocated = 0;
                                ofld_rxq->fl.cl_recycled = 0;
                                ofld_rxq->fl.cl_fast_recycled = 0;
                                counter_u64_zero(
                                    ofld_rxq->rx_iscsi_ddp_setup_ok);
                                counter_u64_zero(
                                    ofld_rxq->rx_iscsi_ddp_setup_error);
                                ofld_rxq->rx_iscsi_ddp_pdus = 0;
                                ofld_rxq->rx_iscsi_ddp_octets = 0;
                                ofld_rxq->rx_iscsi_fl_pdus = 0;
                                ofld_rxq->rx_iscsi_fl_octets = 0;
                                ofld_rxq->rx_toe_tls_records = 0;
                                ofld_rxq->rx_toe_tls_octets = 0;
                        }
#endif

                        if (IS_MAIN_VI(vi)) {
                                wrq = &sc->sge.ctrlq[pi->port_id];
                                wrq->tx_wrs_direct = 0;
                                wrq->tx_wrs_copied = 0;
                        }
                }
        }

        return (0);
}

static int
hold_clip_addr(struct adapter *sc, struct t4_clip_addr *ca)
{
#ifdef INET6
        struct in6_addr in6;

        bcopy(&ca->addr[0], &in6.s6_addr[0], sizeof(in6.s6_addr));
        if (t4_get_clip_entry(sc, &in6, true) != NULL)
                return (0);
        else
                return (EIO);
#else
        return (ENOTSUP);
#endif
}

static int
release_clip_addr(struct adapter *sc, struct t4_clip_addr *ca)
{
#ifdef INET6
        struct in6_addr in6;

        bcopy(&ca->addr[0], &in6.s6_addr[0], sizeof(in6.s6_addr));
        return (t4_release_clip_addr(sc, &in6));
#else
        return (ENOTSUP);
#endif
}

int
t4_os_find_pci_capability(struct adapter *sc, int cap)
{
        int i;

        return (pci_find_cap(sc->dev, cap, &i) == 0 ? i : 0);
}

int
t4_os_pci_save_state(struct adapter *sc)
{
        device_t dev;
        struct pci_devinfo *dinfo;

        dev = sc->dev;
        dinfo = device_get_ivars(dev);

        pci_cfg_save(dev, dinfo, 0);
        return (0);
}

int
t4_os_pci_restore_state(struct adapter *sc)
{
        device_t dev;
        struct pci_devinfo *dinfo;

        dev = sc->dev;
        dinfo = device_get_ivars(dev);

        pci_cfg_restore(dev, dinfo);
        return (0);
}

void
t4_os_portmod_changed(struct port_info *pi)
{
        struct adapter *sc = pi->adapter;
        struct vi_info *vi;
        struct ifnet *ifp;
        static const char *mod_str[] = {
                NULL, "LR", "SR", "ER", "TWINAX", "active TWINAX", "LRM"
        };

        KASSERT((pi->flags & FIXED_IFMEDIA) == 0,
            ("%s: port_type %u", __func__, pi->port_type));

        vi = &pi->vi[0];
        if (begin_synchronized_op(sc, vi, HOLD_LOCK, "t4mod") == 0) {
                PORT_LOCK(pi);
                build_medialist(pi);
                if (pi->mod_type != FW_PORT_MOD_TYPE_NONE) {
                        fixup_link_config(pi);
                        apply_link_config(pi);
                }
                PORT_UNLOCK(pi);
                end_synchronized_op(sc, LOCK_HELD);
        }

        ifp = vi->ifp;
        if (pi->mod_type == FW_PORT_MOD_TYPE_NONE)
                if_printf(ifp, "transceiver unplugged.\n");
        else if (pi->mod_type == FW_PORT_MOD_TYPE_UNKNOWN)
                if_printf(ifp, "unknown transceiver inserted.\n");
        else if (pi->mod_type == FW_PORT_MOD_TYPE_NOTSUPPORTED)
                if_printf(ifp, "unsupported transceiver inserted.\n");
        else if (pi->mod_type > 0 && pi->mod_type < nitems(mod_str)) {
                if_printf(ifp, "%dGbps %s transceiver inserted.\n",
                    port_top_speed(pi), mod_str[pi->mod_type]);
        } else {
                if_printf(ifp, "transceiver (type %d) inserted.\n",
                    pi->mod_type);
        }
}

void
t4_os_link_changed(struct port_info *pi)
{
        struct vi_info *vi;
        struct ifnet *ifp;
        struct link_config *lc = &pi->link_cfg;
        struct adapter *sc = pi->adapter;
        int v;

        PORT_LOCK_ASSERT_OWNED(pi);

        if (is_t6(sc)) {
                if (lc->link_ok) {
                        if (lc->speed > 25000 ||
                            (lc->speed == 25000 && lc->fec == FEC_RS)) {
                                pi->fcs_reg = T5_PORT_REG(pi->tx_chan,
                                    A_MAC_PORT_AFRAMECHECKSEQUENCEERRORS);
                        } else {
                                pi->fcs_reg = T5_PORT_REG(pi->tx_chan,
                                    A_MAC_PORT_MTIP_1G10G_RX_CRCERRORS);
                        }
                        pi->fcs_base = t4_read_reg64(sc, pi->fcs_reg);
                        pi->stats.rx_fcs_err = 0;
                } else {
                        pi->fcs_reg = -1;
                }
        } else {
                MPASS(pi->fcs_reg != -1);
                MPASS(pi->fcs_base == 0);
        }

        for_each_vi(pi, v, vi) {
                ifp = vi->ifp;
                if (ifp == NULL)
                        continue;

                if (lc->link_ok) {
                        ifp->if_baudrate = IF_Mbps(lc->speed);
                        if_link_state_change(ifp, LINK_STATE_UP);
                } else {
                        if_link_state_change(ifp, LINK_STATE_DOWN);
                }
        }
}

void
t4_iterate(void (*func)(struct adapter *, void *), void *arg)
{
        struct adapter *sc;

        sx_slock(&t4_list_lock);
        SLIST_FOREACH(sc, &t4_list, link) {
                /*
                 * func should not make any assumptions about what state sc is
                 * in - the only guarantee is that sc->sc_lock is a valid lock.
                 */
                func(sc, arg);
        }
        sx_sunlock(&t4_list_lock);
}

static int
t4_ioctl(struct cdev *dev, unsigned long cmd, caddr_t data, int fflag,
    struct thread *td)
{
        int rc;
        struct adapter *sc = dev->si_drv1;

        rc = priv_check(td, PRIV_DRIVER);
        if (rc != 0)
                return (rc);

        switch (cmd) {
        case CHELSIO_T4_GETREG: {
                struct t4_reg *edata = (struct t4_reg *)data;

                if ((edata->addr & 0x3) != 0 || edata->addr >= sc->mmio_len)
                        return (EFAULT);

                mtx_lock(&sc->reg_lock);
                if (hw_off_limits(sc))
                        rc = ENXIO;
                else if (edata->size == 4)
                        edata->val = t4_read_reg(sc, edata->addr);
                else if (edata->size == 8)
                        edata->val = t4_read_reg64(sc, edata->addr);
                else
                        rc = EINVAL;
                mtx_unlock(&sc->reg_lock);

                break;
        }
        case CHELSIO_T4_SETREG: {
                struct t4_reg *edata = (struct t4_reg *)data;

                if ((edata->addr & 0x3) != 0 || edata->addr >= sc->mmio_len)
                        return (EFAULT);

                mtx_lock(&sc->reg_lock);
                if (hw_off_limits(sc))
                        rc = ENXIO;
                else if (edata->size == 4) {
                        if (edata->val & 0xffffffff00000000)
                                rc = EINVAL;
                        t4_write_reg(sc, edata->addr, (uint32_t) edata->val);
                } else if (edata->size == 8)
                        t4_write_reg64(sc, edata->addr, edata->val);
                else
                        rc = EINVAL;
                mtx_unlock(&sc->reg_lock);

                break;
        }
        case CHELSIO_T4_REGDUMP: {
                struct t4_regdump *regs = (struct t4_regdump *)data;
                int reglen = t4_get_regs_len(sc);
                uint8_t *buf;

                if (regs->len < reglen) {
                        regs->len = reglen; /* hint to the caller */
                        return (ENOBUFS);
                }

                regs->len = reglen;
                buf = malloc(reglen, M_CXGBE, M_WAITOK | M_ZERO);
                mtx_lock(&sc->reg_lock);
                if (hw_off_limits(sc))
                        rc = ENXIO;
                else
                        get_regs(sc, regs, buf);
                mtx_unlock(&sc->reg_lock);
                if (rc == 0)
                        rc = copyout(buf, regs->data, reglen);
                free(buf, M_CXGBE);
                break;
        }
        case CHELSIO_T4_GET_FILTER_MODE:
                rc = get_filter_mode(sc, (uint32_t *)data);
                break;
        case CHELSIO_T4_SET_FILTER_MODE:
                rc = set_filter_mode(sc, *(uint32_t *)data);
                break;
        case CHELSIO_T4_SET_FILTER_MASK:
                rc = set_filter_mask(sc, *(uint32_t *)data);
                break;
        case CHELSIO_T4_GET_FILTER:
                rc = get_filter(sc, (struct t4_filter *)data);
                break;
        case CHELSIO_T4_SET_FILTER:
                rc = set_filter(sc, (struct t4_filter *)data);
                break;
        case CHELSIO_T4_DEL_FILTER:
                rc = del_filter(sc, (struct t4_filter *)data);
                break;
        case CHELSIO_T4_GET_SGE_CONTEXT:
                rc = get_sge_context(sc, (struct t4_sge_context *)data);
                break;
        case CHELSIO_T4_LOAD_FW:
                rc = load_fw(sc, (struct t4_data *)data);
                break;
        case CHELSIO_T4_GET_MEM:
                rc = read_card_mem(sc, 2, (struct t4_mem_range *)data);
                break;
        case CHELSIO_T4_GET_I2C:
                rc = read_i2c(sc, (struct t4_i2c_data *)data);
                break;
        case CHELSIO_T4_CLEAR_STATS:
                rc = clear_stats(sc, *(uint32_t *)data);
                break;
        case CHELSIO_T4_SCHED_CLASS:
                rc = t4_set_sched_class(sc, (struct t4_sched_params *)data);
                break;
        case CHELSIO_T4_SCHED_QUEUE:
                rc = t4_set_sched_queue(sc, (struct t4_sched_queue *)data);
                break;
        case CHELSIO_T4_GET_TRACER:
                rc = t4_get_tracer(sc, (struct t4_tracer *)data);
                break;
        case CHELSIO_T4_SET_TRACER:
                rc = t4_set_tracer(sc, (struct t4_tracer *)data);
                break;
        case CHELSIO_T4_LOAD_CFG:
                rc = load_cfg(sc, (struct t4_data *)data);
                break;
        case CHELSIO_T4_LOAD_BOOT:
                rc = load_boot(sc, (struct t4_bootrom *)data);
                break;
        case CHELSIO_T4_LOAD_BOOTCFG:
                rc = load_bootcfg(sc, (struct t4_data *)data);
                break;
        case CHELSIO_T4_CUDBG_DUMP:
                rc = cudbg_dump(sc, (struct t4_cudbg_dump *)data);
                break;
        case CHELSIO_T4_SET_OFLD_POLICY:
                rc = set_offload_policy(sc, (struct t4_offload_policy *)data);
                break;
        case CHELSIO_T4_HOLD_CLIP_ADDR:
                rc = hold_clip_addr(sc, (struct t4_clip_addr *)data);
                break;
        case CHELSIO_T4_RELEASE_CLIP_ADDR:
                rc = release_clip_addr(sc, (struct t4_clip_addr *)data);
                break;
        default:
                rc = ENOTTY;
        }

        return (rc);
}

#ifdef TCP_OFFLOAD
static int
toe_capability(struct vi_info *vi, bool enable)
{
        int rc;
        struct port_info *pi = vi->pi;
        struct adapter *sc = pi->adapter;

        ASSERT_SYNCHRONIZED_OP(sc);

        if (!is_offload(sc))
                return (ENODEV);
        if (hw_off_limits(sc))
                return (ENXIO);

        if (enable) {
#ifdef KERN_TLS
                if (sc->flags & KERN_TLS_ON) {
                        int i, j, n;
                        struct port_info *p;
                        struct vi_info *v;

                        /*
                         * Reconfigure hardware for TOE if TXTLS is not enabled
                         * on any ifnet.
                         */
                        n = 0;
                        for_each_port(sc, i) {
                                p = sc->port[i];
                                for_each_vi(p, j, v) {
                                        if (v->ifp->if_capenable & IFCAP_TXTLS) {
                                                CH_WARN(sc,
                                                    "%s has NIC TLS enabled.\n",
                                                    device_get_nameunit(v->dev));
                                                n++;
                                        }
                                }
                        }
                        if (n > 0) {
                                CH_WARN(sc, "Disable NIC TLS on all interfaces "
                                    "associated with this adapter before "
                                    "trying to enable TOE.\n");
                                return (EAGAIN);
                        }
                        rc = t4_config_kern_tls(sc, false);
                        if (rc)
                                return (rc);
                }
#endif
                if ((vi->ifp->if_capenable & IFCAP_TOE) != 0) {
                        /* TOE is already enabled. */
                        return (0);
                }

                /*
                 * We need the port's queues around so that we're able to send
                 * and receive CPLs to/from the TOE even if the ifnet for this
                 * port has never been UP'd administratively.
                 */
                if (!(vi->flags & VI_INIT_DONE) && ((rc = vi_init(vi)) != 0))
                        return (rc);
                if (!(pi->vi[0].flags & VI_INIT_DONE) &&
                    ((rc = vi_init(&pi->vi[0])) != 0))
                        return (rc);

                if (isset(&sc->offload_map, pi->port_id)) {
                        /* TOE is enabled on another VI of this port. */
                        pi->uld_vis++;
                        return (0);
                }

                if (!uld_active(sc, ULD_TOM)) {
                        rc = t4_activate_uld(sc, ULD_TOM);
                        if (rc == EAGAIN) {
                                log(LOG_WARNING,
                                    "You must kldload t4_tom.ko before trying "
                                    "to enable TOE on a cxgbe interface.\n");
                        }
                        if (rc != 0)
                                return (rc);
                        KASSERT(sc->tom_softc != NULL,
                            ("%s: TOM activated but softc NULL", __func__));
                        KASSERT(uld_active(sc, ULD_TOM),
                            ("%s: TOM activated but flag not set", __func__));
                }

                /* Activate iWARP and iSCSI too, if the modules are loaded. */
                if (!uld_active(sc, ULD_IWARP))
                        (void) t4_activate_uld(sc, ULD_IWARP);
                if (!uld_active(sc, ULD_ISCSI))
                        (void) t4_activate_uld(sc, ULD_ISCSI);

                pi->uld_vis++;
                setbit(&sc->offload_map, pi->port_id);
        } else {
                pi->uld_vis--;

                if (!isset(&sc->offload_map, pi->port_id) || pi->uld_vis > 0)
                        return (0);

                KASSERT(uld_active(sc, ULD_TOM),
                    ("%s: TOM never initialized?", __func__));
                clrbit(&sc->offload_map, pi->port_id);
        }

        return (0);
}

/*
 * Add an upper layer driver to the global list.
 */
int
t4_register_uld(struct uld_info *ui)
{
        int rc = 0;
        struct uld_info *u;

        sx_xlock(&t4_uld_list_lock);
        SLIST_FOREACH(u, &t4_uld_list, link) {
            if (u->uld_id == ui->uld_id) {
                    rc = EEXIST;
                    goto done;
            }
        }

        SLIST_INSERT_HEAD(&t4_uld_list, ui, link);
        ui->refcount = 0;
done:
        sx_xunlock(&t4_uld_list_lock);
        return (rc);
}

int
t4_unregister_uld(struct uld_info *ui)
{
        int rc = EINVAL;
        struct uld_info *u;

        sx_xlock(&t4_uld_list_lock);

        SLIST_FOREACH(u, &t4_uld_list, link) {
            if (u == ui) {
                    if (ui->refcount > 0) {
                            rc = EBUSY;
                            goto done;
                    }

                    SLIST_REMOVE(&t4_uld_list, ui, uld_info, link);
                    rc = 0;
                    goto done;
            }
        }
done:
        sx_xunlock(&t4_uld_list_lock);
        return (rc);
}

int
t4_activate_uld(struct adapter *sc, int id)
{
        int rc;
        struct uld_info *ui;

        ASSERT_SYNCHRONIZED_OP(sc);

        if (id < 0 || id > ULD_MAX)
                return (EINVAL);
        rc = EAGAIN;    /* kldoad the module with this ULD and try again. */

        sx_slock(&t4_uld_list_lock);

        SLIST_FOREACH(ui, &t4_uld_list, link) {
                if (ui->uld_id == id) {
                        if (!(sc->flags & FULL_INIT_DONE)) {
                                rc = adapter_init(sc);
                                if (rc != 0)
                                        break;
                        }

                        rc = ui->activate(sc);
                        if (rc == 0) {
                                setbit(&sc->active_ulds, id);
                                ui->refcount++;
                        }
                        break;
                }
        }

        sx_sunlock(&t4_uld_list_lock);

        return (rc);
}

int
t4_deactivate_uld(struct adapter *sc, int id)
{
        int rc;
        struct uld_info *ui;

        ASSERT_SYNCHRONIZED_OP(sc);

        if (id < 0 || id > ULD_MAX)
                return (EINVAL);
        rc = ENXIO;

        sx_slock(&t4_uld_list_lock);

        SLIST_FOREACH(ui, &t4_uld_list, link) {
                if (ui->uld_id == id) {
                        rc = ui->deactivate(sc);
                        if (rc == 0) {
                                clrbit(&sc->active_ulds, id);
                                ui->refcount--;
                        }
                        break;
                }
        }

        sx_sunlock(&t4_uld_list_lock);

        return (rc);
}

static void
t4_async_event(void *arg, int n)
{
        struct uld_info *ui;
        struct adapter *sc = (struct adapter *)arg;

        if (begin_synchronized_op(sc, NULL, SLEEP_OK | INTR_OK, "t4async") != 0)
                return;
        sx_slock(&t4_uld_list_lock);
        SLIST_FOREACH(ui, &t4_uld_list, link) {
                if (ui->uld_id == ULD_IWARP) {
                        ui->async_event(sc);
                        break;
                }
        }
        sx_sunlock(&t4_uld_list_lock);
        end_synchronized_op(sc, 0);
}

int
uld_active(struct adapter *sc, int uld_id)
{

        MPASS(uld_id >= 0 && uld_id <= ULD_MAX);

        return (isset(&sc->active_ulds, uld_id));
}
#endif

#ifdef KERN_TLS
static int
ktls_capability(struct adapter *sc, bool enable)
{
        ASSERT_SYNCHRONIZED_OP(sc);

        if (!is_ktls(sc))
                return (ENODEV);
        if (hw_off_limits(sc))
                return (ENXIO);

        if (enable) {
                if (sc->flags & KERN_TLS_ON)
                        return (0);     /* already on */
                if (sc->offload_map != 0) {
                        CH_WARN(sc,
                            "Disable TOE on all interfaces associated with "
                            "this adapter before trying to enable NIC TLS.\n");
                        return (EAGAIN);
                }
                return (t4_config_kern_tls(sc, true));
        } else {
                /*
                 * Nothing to do for disable.  If TOE is enabled sometime later
                 * then toe_capability will reconfigure the hardware.
                 */
                return (0);
        }
}
#endif

/*
 * t  = ptr to tunable.
 * nc = number of CPUs.
 * c  = compiled in default for that tunable.
 */
static void
calculate_nqueues(int *t, int nc, const int c)
{
        int nq;

        if (*t > 0)
                return;
        nq = *t < 0 ? -*t : c;
        *t = min(nc, nq);
}

/*
 * Come up with reasonable defaults for some of the tunables, provided they're
 * not set by the user (in which case we'll use the values as is).
 */
static void
tweak_tunables(void)
{
        int nc = mp_ncpus;      /* our snapshot of the number of CPUs */

        if (t4_ntxq < 1) {
#ifdef RSS
                t4_ntxq = rss_getnumbuckets();
#else
                calculate_nqueues(&t4_ntxq, nc, NTXQ);
#endif
        }

        calculate_nqueues(&t4_ntxq_vi, nc, NTXQ_VI);

        if (t4_nrxq < 1) {
#ifdef RSS
                t4_nrxq = rss_getnumbuckets();
#else
                calculate_nqueues(&t4_nrxq, nc, NRXQ);
#endif
        }

        calculate_nqueues(&t4_nrxq_vi, nc, NRXQ_VI);

#if defined(TCP_OFFLOAD) || defined(RATELIMIT)
        calculate_nqueues(&t4_nofldtxq, nc, NOFLDTXQ);
        calculate_nqueues(&t4_nofldtxq_vi, nc, NOFLDTXQ_VI);
#endif
#ifdef TCP_OFFLOAD
        calculate_nqueues(&t4_nofldrxq, nc, NOFLDRXQ);
        calculate_nqueues(&t4_nofldrxq_vi, nc, NOFLDRXQ_VI);
#endif

#if defined(TCP_OFFLOAD) || defined(KERN_TLS)
        if (t4_toecaps_allowed == -1)
                t4_toecaps_allowed = FW_CAPS_CONFIG_TOE;
#else
        if (t4_toecaps_allowed == -1)
                t4_toecaps_allowed = 0;
#endif

#ifdef TCP_OFFLOAD
        if (t4_rdmacaps_allowed == -1) {
                t4_rdmacaps_allowed = FW_CAPS_CONFIG_RDMA_RDDP |
                    FW_CAPS_CONFIG_RDMA_RDMAC;
        }

        if (t4_iscsicaps_allowed == -1) {
                t4_iscsicaps_allowed = FW_CAPS_CONFIG_ISCSI_INITIATOR_PDU |
                    FW_CAPS_CONFIG_ISCSI_TARGET_PDU |
                    FW_CAPS_CONFIG_ISCSI_T10DIF;
        }

        if (t4_tmr_idx_ofld < 0 || t4_tmr_idx_ofld >= SGE_NTIMERS)
                t4_tmr_idx_ofld = TMR_IDX_OFLD;

        if (t4_pktc_idx_ofld < -1 || t4_pktc_idx_ofld >= SGE_NCOUNTERS)
                t4_pktc_idx_ofld = PKTC_IDX_OFLD;

        if (t4_toe_tls_rx_timeout < 0)
                t4_toe_tls_rx_timeout = 0;
#else
        if (t4_rdmacaps_allowed == -1)
                t4_rdmacaps_allowed = 0;

        if (t4_iscsicaps_allowed == -1)
                t4_iscsicaps_allowed = 0;
#endif

#ifdef DEV_NETMAP
        calculate_nqueues(&t4_nnmtxq, nc, NNMTXQ);
        calculate_nqueues(&t4_nnmrxq, nc, NNMRXQ);
        calculate_nqueues(&t4_nnmtxq_vi, nc, NNMTXQ_VI);
        calculate_nqueues(&t4_nnmrxq_vi, nc, NNMRXQ_VI);
#endif

        if (t4_tmr_idx < 0 || t4_tmr_idx >= SGE_NTIMERS)
                t4_tmr_idx = TMR_IDX;

        if (t4_pktc_idx < -1 || t4_pktc_idx >= SGE_NCOUNTERS)
                t4_pktc_idx = PKTC_IDX;

        if (t4_qsize_txq < 128)
                t4_qsize_txq = 128;

        if (t4_qsize_rxq < 128)
                t4_qsize_rxq = 128;
        while (t4_qsize_rxq & 7)
                t4_qsize_rxq++;

        t4_intr_types &= INTR_MSIX | INTR_MSI | INTR_INTX;

        /*
         * Number of VIs to create per-port.  The first VI is the "main" regular
         * VI for the port.  The rest are additional virtual interfaces on the
         * same physical port.  Note that the main VI does not have native
         * netmap support but the extra VIs do.
         *
         * Limit the number of VIs per port to the number of available
         * MAC addresses per port.
         */
        if (t4_num_vis < 1)
                t4_num_vis = 1;
        if (t4_num_vis > nitems(vi_mac_funcs)) {
                t4_num_vis = nitems(vi_mac_funcs);
                printf("cxgbe: number of VIs limited to %d\n", t4_num_vis);
        }

        if (pcie_relaxed_ordering < 0 || pcie_relaxed_ordering > 2) {
                pcie_relaxed_ordering = 1;
#if defined(__i386__) || defined(__amd64__)
                if (cpu_vendor_id == CPU_VENDOR_INTEL)
                        pcie_relaxed_ordering = 0;
#endif
        }
}

#ifdef DDB
static void
t4_dump_tcb(struct adapter *sc, int tid)
{
        uint32_t base, i, j, off, pf, reg, save, tcb_addr, win_pos;

        reg = PCIE_MEM_ACCESS_REG(A_PCIE_MEM_ACCESS_OFFSET, 2);
        save = t4_read_reg(sc, reg);
        base = sc->memwin[2].mw_base;

        /* Dump TCB for the tid */
        tcb_addr = t4_read_reg(sc, A_TP_CMM_TCB_BASE);
        tcb_addr += tid * TCB_SIZE;

        if (is_t4(sc)) {
                pf = 0;
                win_pos = tcb_addr & ~0xf;      /* start must be 16B aligned */
        } else {
                pf = V_PFNUM(sc->pf);
                win_pos = tcb_addr & ~0x7f;     /* start must be 128B aligned */
        }
        t4_write_reg(sc, reg, win_pos | pf);
        t4_read_reg(sc, reg);

        off = tcb_addr - win_pos;
        for (i = 0; i < 4; i++) {
                uint32_t buf[8];
                for (j = 0; j < 8; j++, off += 4)
                        buf[j] = htonl(t4_read_reg(sc, base + off));

                db_printf("%08x %08x %08x %08x %08x %08x %08x %08x\n",
                    buf[0], buf[1], buf[2], buf[3], buf[4], buf[5], buf[6],
                    buf[7]);
        }

        t4_write_reg(sc, reg, save);
        t4_read_reg(sc, reg);
}

static void
t4_dump_devlog(struct adapter *sc)
{
        struct devlog_params *dparams = &sc->params.devlog;
        struct fw_devlog_e e;
        int i, first, j, m, nentries, rc;
        uint64_t ftstamp = UINT64_MAX;

        if (dparams->start == 0) {
                db_printf("devlog params not valid\n");
                return;
        }

        nentries = dparams->size / sizeof(struct fw_devlog_e);
        m = fwmtype_to_hwmtype(dparams->memtype);

        /* Find the first entry. */
        first = -1;
        for (i = 0; i < nentries && !db_pager_quit; i++) {
                rc = -t4_mem_read(sc, m, dparams->start + i * sizeof(e),
                    sizeof(e), (void *)&e);
                if (rc != 0)
                        break;

                if (e.timestamp == 0)
                        break;

                e.timestamp = be64toh(e.timestamp);
                if (e.timestamp < ftstamp) {
                        ftstamp = e.timestamp;
                        first = i;
                }
        }

        if (first == -1)
                return;

        i = first;
        do {
                rc = -t4_mem_read(sc, m, dparams->start + i * sizeof(e),
                    sizeof(e), (void *)&e);
                if (rc != 0)
                        return;

                if (e.timestamp == 0)
                        return;

                e.timestamp = be64toh(e.timestamp);
                e.seqno = be32toh(e.seqno);
                for (j = 0; j < 8; j++)
                        e.params[j] = be32toh(e.params[j]);

                db_printf("%10d  %15ju  %8s  %8s  ",
                    e.seqno, e.timestamp,
                    (e.level < nitems(devlog_level_strings) ?
                        devlog_level_strings[e.level] : "UNKNOWN"),
                    (e.facility < nitems(devlog_facility_strings) ?
                        devlog_facility_strings[e.facility] : "UNKNOWN"));
                db_printf(e.fmt, e.params[0], e.params[1], e.params[2],
                    e.params[3], e.params[4], e.params[5], e.params[6],
                    e.params[7]);

                if (++i == nentries)
                        i = 0;
        } while (i != first && !db_pager_quit);
}

static struct command_table db_t4_table = LIST_HEAD_INITIALIZER(db_t4_table);
_DB_SET(_show, t4, NULL, db_show_table, 0, &db_t4_table);

DB_FUNC(devlog, db_show_devlog, db_t4_table, CS_OWN, NULL)
{
        device_t dev;
        int t;
        bool valid;

        valid = false;
        t = db_read_token();
        if (t == tIDENT) {
                dev = device_lookup_by_name(db_tok_string);
                valid = true;
        }
        db_skip_to_eol();
        if (!valid) {
                db_printf("usage: show t4 devlog <nexus>\n");
                return;
        }

        if (dev == NULL) {
                db_printf("device not found\n");
                return;
        }

        t4_dump_devlog(device_get_softc(dev));
}

DB_FUNC(tcb, db_show_t4tcb, db_t4_table, CS_OWN, NULL)
{
        device_t dev;
        int radix, tid, t;
        bool valid;

        valid = false;
        radix = db_radix;
        db_radix = 10;
        t = db_read_token();
        if (t == tIDENT) {
                dev = device_lookup_by_name(db_tok_string);
                t = db_read_token();
                if (t == tNUMBER) {
                        tid = db_tok_number;
                        valid = true;
                }
        }       
        db_radix = radix;
        db_skip_to_eol();
        if (!valid) {
                db_printf("usage: show t4 tcb <nexus> <tid>\n");
                return;
        }

        if (dev == NULL) {
                db_printf("device not found\n");
                return;
        }
        if (tid < 0) {
                db_printf("invalid tid\n");
                return;
        }

        t4_dump_tcb(device_get_softc(dev), tid);
}
#endif

static eventhandler_tag vxlan_start_evtag;
static eventhandler_tag vxlan_stop_evtag;

struct vxlan_evargs {
        struct ifnet *ifp;
        uint16_t port;
};

static void
enable_vxlan_rx(struct adapter *sc)
{
        int i, rc;
        struct port_info *pi;
        uint8_t match_all_mac[ETHER_ADDR_LEN] = {0};

        ASSERT_SYNCHRONIZED_OP(sc);

        t4_write_reg(sc, A_MPS_RX_VXLAN_TYPE, V_VXLAN(sc->vxlan_port) |
            F_VXLAN_EN);
        for_each_port(sc, i) {
                pi = sc->port[i];
                if (pi->vxlan_tcam_entry == true)
                        continue;
                rc = t4_alloc_raw_mac_filt(sc, pi->vi[0].viid, match_all_mac,
                    match_all_mac, sc->rawf_base + pi->port_id, 1, pi->port_id,
                    true);
                if (rc < 0) {
                        rc = -rc;
                        CH_ERR(&pi->vi[0],
                            "failed to add VXLAN TCAM entry: %d.\n", rc);
                } else {
                        MPASS(rc == sc->rawf_base + pi->port_id);
                        pi->vxlan_tcam_entry = true;
                }
        }
}

static void
t4_vxlan_start(struct adapter *sc, void *arg)
{
        struct vxlan_evargs *v = arg;

        if (sc->nrawf == 0 || chip_id(sc) <= CHELSIO_T5)
                return;
        if (begin_synchronized_op(sc, NULL, SLEEP_OK | INTR_OK, "t4vxst") != 0)
                return;

        if (sc->vxlan_refcount == 0) {
                sc->vxlan_port = v->port;
                sc->vxlan_refcount = 1;
                if (!hw_off_limits(sc))
                        enable_vxlan_rx(sc);
        } else if (sc->vxlan_port == v->port) {
                sc->vxlan_refcount++;
        } else {
                CH_ERR(sc, "VXLAN already configured on port  %d; "
                    "ignoring attempt to configure it on port %d\n",
                    sc->vxlan_port, v->port);
        }
        end_synchronized_op(sc, 0);
}

static void
t4_vxlan_stop(struct adapter *sc, void *arg)
{
        struct vxlan_evargs *v = arg;

        if (sc->nrawf == 0 || chip_id(sc) <= CHELSIO_T5)
                return;
        if (begin_synchronized_op(sc, NULL, SLEEP_OK | INTR_OK, "t4vxsp") != 0)
                return;

        /*
         * VXLANs may have been configured before the driver was loaded so we
         * may see more stops than starts.  This is not handled cleanly but at
         * least we keep the refcount sane.
         */
        if (sc->vxlan_port != v->port)
                goto done;
        if (sc->vxlan_refcount == 0) {
                CH_ERR(sc, "VXLAN operation on port %d was stopped earlier; "
                    "ignoring attempt to stop it again.\n", sc->vxlan_port);
        } else if (--sc->vxlan_refcount == 0 && !hw_off_limits(sc))
                t4_set_reg_field(sc, A_MPS_RX_VXLAN_TYPE, F_VXLAN_EN, 0);
done:
        end_synchronized_op(sc, 0);
}

static void
t4_vxlan_start_handler(void *arg __unused, struct ifnet *ifp,
    sa_family_t family, u_int port)
{
        struct vxlan_evargs v;

        MPASS(family == AF_INET || family == AF_INET6);
        v.ifp = ifp;
        v.port = port;

        t4_iterate(t4_vxlan_start, &v);
}

static void
t4_vxlan_stop_handler(void *arg __unused, struct ifnet *ifp, sa_family_t family,
    u_int port)
{
        struct vxlan_evargs v;

        MPASS(family == AF_INET || family == AF_INET6);
        v.ifp = ifp;
        v.port = port;

        t4_iterate(t4_vxlan_stop, &v);
}


static struct sx mlu;   /* mod load unload */
SX_SYSINIT(cxgbe_mlu, &mlu, "cxgbe mod load/unload");

static int
mod_event(module_t mod, int cmd, void *arg)
{
        int rc = 0;
        static int loaded = 0;

        switch (cmd) {
        case MOD_LOAD:
                sx_xlock(&mlu);
                if (loaded++ == 0) {
                        t4_sge_modload();
                        t4_register_shared_cpl_handler(CPL_SET_TCB_RPL,
                            t4_filter_rpl, CPL_COOKIE_FILTER);
                        t4_register_shared_cpl_handler(CPL_L2T_WRITE_RPL,
                            do_l2t_write_rpl, CPL_COOKIE_FILTER);
                        t4_register_shared_cpl_handler(CPL_ACT_OPEN_RPL,
                            t4_hashfilter_ao_rpl, CPL_COOKIE_HASHFILTER);
                        t4_register_shared_cpl_handler(CPL_SET_TCB_RPL,
                            t4_hashfilter_tcb_rpl, CPL_COOKIE_HASHFILTER);
                        t4_register_shared_cpl_handler(CPL_ABORT_RPL_RSS,
                            t4_del_hashfilter_rpl, CPL_COOKIE_HASHFILTER);
                        t4_register_cpl_handler(CPL_TRACE_PKT, t4_trace_pkt);
                        t4_register_cpl_handler(CPL_T5_TRACE_PKT, t5_trace_pkt);
                        t4_register_cpl_handler(CPL_SMT_WRITE_RPL,
                            do_smt_write_rpl);
                        sx_init(&t4_list_lock, "T4/T5 adapters");
                        SLIST_INIT(&t4_list);
                        callout_init(&fatal_callout, 1);
#ifdef TCP_OFFLOAD
                        sx_init(&t4_uld_list_lock, "T4/T5 ULDs");
                        SLIST_INIT(&t4_uld_list);
#endif
#ifdef INET6
                        t4_clip_modload();
#endif
#ifdef KERN_TLS
                        t6_ktls_modload();
#endif
                        t4_tracer_modload();
                        tweak_tunables();
                        vxlan_start_evtag =
                            EVENTHANDLER_REGISTER(vxlan_start,
                                t4_vxlan_start_handler, NULL,
                                EVENTHANDLER_PRI_ANY);
                        vxlan_stop_evtag =
                            EVENTHANDLER_REGISTER(vxlan_stop,
                                t4_vxlan_stop_handler, NULL,
                                EVENTHANDLER_PRI_ANY);
                        reset_tq = taskqueue_create("t4_rst_tq", M_WAITOK,
                            taskqueue_thread_enqueue, &reset_tq);
                        taskqueue_start_threads(&reset_tq, 1, PI_SOFT,
                            "t4_rst_thr");
                }
                sx_xunlock(&mlu);
                break;

        case MOD_UNLOAD:
                sx_xlock(&mlu);
                if (--loaded == 0) {
                        int tries;

                        taskqueue_free(reset_tq);
                        sx_slock(&t4_list_lock);
                        if (!SLIST_EMPTY(&t4_list)) {
                                rc = EBUSY;
                                sx_sunlock(&t4_list_lock);
                                goto done_unload;
                        }
#ifdef TCP_OFFLOAD
                        sx_slock(&t4_uld_list_lock);
                        if (!SLIST_EMPTY(&t4_uld_list)) {
                                rc = EBUSY;
                                sx_sunlock(&t4_uld_list_lock);
                                sx_sunlock(&t4_list_lock);
                                goto done_unload;
                        }
#endif
                        tries = 0;
                        while (tries++ < 5 && t4_sge_extfree_refs() != 0) {
                                uprintf("%ju clusters with custom free routine "
                                    "still is use.\n", t4_sge_extfree_refs());
                                pause("t4unload", 2 * hz);
                        }
#ifdef TCP_OFFLOAD
                        sx_sunlock(&t4_uld_list_lock);
#endif
                        sx_sunlock(&t4_list_lock);

                        if (t4_sge_extfree_refs() == 0) {
                                EVENTHANDLER_DEREGISTER(vxlan_start,
                                    vxlan_start_evtag);
                                EVENTHANDLER_DEREGISTER(vxlan_stop,
                                    vxlan_stop_evtag);
                                t4_tracer_modunload();
#ifdef KERN_TLS
                                t6_ktls_modunload();
#endif
#ifdef INET6
                                t4_clip_modunload();
#endif
#ifdef TCP_OFFLOAD
                                sx_destroy(&t4_uld_list_lock);
#endif
                                sx_destroy(&t4_list_lock);
                                t4_sge_modunload();
                                loaded = 0;
                        } else {
                                rc = EBUSY;
                                loaded++;       /* undo earlier decrement */
                        }
                }
done_unload:
                sx_xunlock(&mlu);
                break;
        }

        return (rc);
}

static devclass_t t4_devclass, t5_devclass, t6_devclass;
static devclass_t cxgbe_devclass, cxl_devclass, cc_devclass;
static devclass_t vcxgbe_devclass, vcxl_devclass, vcc_devclass;

DRIVER_MODULE(t4nex, pci, t4_driver, t4_devclass, mod_event, 0);
MODULE_VERSION(t4nex, 1);
MODULE_DEPEND(t4nex, firmware, 1, 1, 1);
#ifdef DEV_NETMAP
MODULE_DEPEND(t4nex, netmap, 1, 1, 1);
#endif /* DEV_NETMAP */

DRIVER_MODULE(t5nex, pci, t5_driver, t5_devclass, mod_event, 0);
MODULE_VERSION(t5nex, 1);
MODULE_DEPEND(t5nex, firmware, 1, 1, 1);
#ifdef DEV_NETMAP
MODULE_DEPEND(t5nex, netmap, 1, 1, 1);
#endif /* DEV_NETMAP */

DRIVER_MODULE(t6nex, pci, t6_driver, t6_devclass, mod_event, 0);
MODULE_VERSION(t6nex, 1);
MODULE_DEPEND(t6nex, firmware, 1, 1, 1);
#ifdef DEV_NETMAP
MODULE_DEPEND(t6nex, netmap, 1, 1, 1);
#endif /* DEV_NETMAP */

DRIVER_MODULE(cxgbe, t4nex, cxgbe_driver, cxgbe_devclass, 0, 0);
MODULE_VERSION(cxgbe, 1);

DRIVER_MODULE(cxl, t5nex, cxl_driver, cxl_devclass, 0, 0);
MODULE_VERSION(cxl, 1);

DRIVER_MODULE(cc, t6nex, cc_driver, cc_devclass, 0, 0);
MODULE_VERSION(cc, 1);

DRIVER_MODULE(vcxgbe, cxgbe, vcxgbe_driver, vcxgbe_devclass, 0, 0);
MODULE_VERSION(vcxgbe, 1);

DRIVER_MODULE(vcxl, cxl, vcxl_driver, vcxl_devclass, 0, 0);
MODULE_VERSION(vcxl, 1);

DRIVER_MODULE(vcc, cc, vcc_driver, vcc_devclass, 0, 0);
MODULE_VERSION(vcc, 1);