MFC r253338:

[FreeBSD/stable/9.git] / sys / dev / bge / if_bge.c

/*-
 * Copyright (c) 2001 Wind River Systems
 * Copyright (c) 1997, 1998, 1999, 2001
 *      Bill Paul <wpaul@windriver.com>.  All rights reserved.
 *
 * 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.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by Bill Paul.
 * 4. Neither the name of the author nor the names of any co-contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY Bill Paul 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 Bill Paul OR THE VOICES IN HIS HEAD
 * 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("$FreeBSD$");

/*
 * Broadcom BCM57xx(x)/BCM590x NetXtreme and NetLink family Ethernet driver
 *
 * The Broadcom BCM5700 is based on technology originally developed by
 * Alteon Networks as part of the Tigon I and Tigon II Gigabit Ethernet
 * MAC chips. The BCM5700, sometimes referred to as the Tigon III, has
 * two on-board MIPS R4000 CPUs and can have as much as 16MB of external
 * SSRAM. The BCM5700 supports TCP, UDP and IP checksum offload, jumbo
 * frames, highly configurable RX filtering, and 16 RX and TX queues
 * (which, along with RX filter rules, can be used for QOS applications).
 * Other features, such as TCP segmentation, may be available as part
 * of value-added firmware updates. Unlike the Tigon I and Tigon II,
 * firmware images can be stored in hardware and need not be compiled
 * into the driver.
 *
 * The BCM5700 supports the PCI v2.2 and PCI-X v1.0 standards, and will
 * function in a 32-bit/64-bit 33/66Mhz bus, or a 64-bit/133Mhz bus.
 *
 * The BCM5701 is a single-chip solution incorporating both the BCM5700
 * MAC and a BCM5401 10/100/1000 PHY. Unlike the BCM5700, the BCM5701
 * does not support external SSRAM.
 *
 * Broadcom also produces a variation of the BCM5700 under the "Altima"
 * brand name, which is functionally similar but lacks PCI-X support.
 *
 * Without external SSRAM, you can only have at most 4 TX rings,
 * and the use of the mini RX ring is disabled. This seems to imply
 * that these features are simply not available on the BCM5701. As a
 * result, this driver does not implement any support for the mini RX
 * ring.
 */

#ifdef HAVE_KERNEL_OPTION_HEADERS
#include "opt_device_polling.h"
#endif

#include <sys/param.h>
#include <sys/endian.h>
#include <sys/systm.h>
#include <sys/sockio.h>
#include <sys/mbuf.h>
#include <sys/malloc.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/socket.h>
#include <sys/sysctl.h>
#include <sys/taskqueue.h>

#include <net/if.h>
#include <net/if_arp.h>
#include <net/ethernet.h>
#include <net/if_dl.h>
#include <net/if_media.h>

#include <net/bpf.h>

#include <net/if_types.h>
#include <net/if_vlan_var.h>

#include <netinet/in_systm.h>
#include <netinet/in.h>
#include <netinet/ip.h>
#include <netinet/tcp.h>

#include <machine/bus.h>
#include <machine/resource.h>
#include <sys/bus.h>
#include <sys/rman.h>

#include <dev/mii/mii.h>
#include <dev/mii/miivar.h>
#include "miidevs.h"
#include <dev/mii/brgphyreg.h>

#ifdef __sparc64__
#include <dev/ofw/ofw_bus.h>
#include <dev/ofw/openfirm.h>
#include <machine/ofw_machdep.h>
#include <machine/ver.h>
#endif

#include <dev/pci/pcireg.h>
#include <dev/pci/pcivar.h>

#include <dev/bge/if_bgereg.h>

#define BGE_CSUM_FEATURES       (CSUM_IP | CSUM_TCP)
#define ETHER_MIN_NOPAD         (ETHER_MIN_LEN - ETHER_CRC_LEN) /* i.e., 60 */

MODULE_DEPEND(bge, pci, 1, 1, 1);
MODULE_DEPEND(bge, ether, 1, 1, 1);
MODULE_DEPEND(bge, miibus, 1, 1, 1);

/* "device miibus" required.  See GENERIC if you get errors here. */
#include "miibus_if.h"

/*
 * Various supported device vendors/types and their names. Note: the
 * spec seems to indicate that the hardware still has Alteon's vendor
 * ID burned into it, though it will always be overriden by the vendor
 * ID in the EEPROM. Just to be safe, we cover all possibilities.
 */
static const struct bge_type {
        uint16_t        bge_vid;
        uint16_t        bge_did;
} bge_devs[] = {
        { ALTEON_VENDORID,      ALTEON_DEVICEID_BCM5700 },
        { ALTEON_VENDORID,      ALTEON_DEVICEID_BCM5701 },

        { ALTIMA_VENDORID,      ALTIMA_DEVICE_AC1000 },
        { ALTIMA_VENDORID,      ALTIMA_DEVICE_AC1002 },
        { ALTIMA_VENDORID,      ALTIMA_DEVICE_AC9100 },

        { APPLE_VENDORID,       APPLE_DEVICE_BCM5701 },

        { BCOM_VENDORID,        BCOM_DEVICEID_BCM5700 },
        { BCOM_VENDORID,        BCOM_DEVICEID_BCM5701 },
        { BCOM_VENDORID,        BCOM_DEVICEID_BCM5702 },
        { BCOM_VENDORID,        BCOM_DEVICEID_BCM5702_ALT },
        { BCOM_VENDORID,        BCOM_DEVICEID_BCM5702X },
        { BCOM_VENDORID,        BCOM_DEVICEID_BCM5703 },
        { BCOM_VENDORID,        BCOM_DEVICEID_BCM5703_ALT },
        { BCOM_VENDORID,        BCOM_DEVICEID_BCM5703X },
        { BCOM_VENDORID,        BCOM_DEVICEID_BCM5704C },
        { BCOM_VENDORID,        BCOM_DEVICEID_BCM5704S },
        { BCOM_VENDORID,        BCOM_DEVICEID_BCM5704S_ALT },
        { BCOM_VENDORID,        BCOM_DEVICEID_BCM5705 },
        { BCOM_VENDORID,        BCOM_DEVICEID_BCM5705F },
        { BCOM_VENDORID,        BCOM_DEVICEID_BCM5705K },
        { BCOM_VENDORID,        BCOM_DEVICEID_BCM5705M },
        { BCOM_VENDORID,        BCOM_DEVICEID_BCM5705M_ALT },
        { BCOM_VENDORID,        BCOM_DEVICEID_BCM5714C },
        { BCOM_VENDORID,        BCOM_DEVICEID_BCM5714S },
        { BCOM_VENDORID,        BCOM_DEVICEID_BCM5715 },
        { BCOM_VENDORID,        BCOM_DEVICEID_BCM5715S },
        { BCOM_VENDORID,        BCOM_DEVICEID_BCM5717 },
        { BCOM_VENDORID,        BCOM_DEVICEID_BCM5718 },
        { BCOM_VENDORID,        BCOM_DEVICEID_BCM5719 },
        { BCOM_VENDORID,        BCOM_DEVICEID_BCM5720 },
        { BCOM_VENDORID,        BCOM_DEVICEID_BCM5721 },
        { BCOM_VENDORID,        BCOM_DEVICEID_BCM5722 },
        { BCOM_VENDORID,        BCOM_DEVICEID_BCM5723 },
        { BCOM_VENDORID,        BCOM_DEVICEID_BCM5725 },
        { BCOM_VENDORID,        BCOM_DEVICEID_BCM5727 },
        { BCOM_VENDORID,        BCOM_DEVICEID_BCM5750 },
        { BCOM_VENDORID,        BCOM_DEVICEID_BCM5750M },
        { BCOM_VENDORID,        BCOM_DEVICEID_BCM5751 },
        { BCOM_VENDORID,        BCOM_DEVICEID_BCM5751F },
        { BCOM_VENDORID,        BCOM_DEVICEID_BCM5751M },
        { BCOM_VENDORID,        BCOM_DEVICEID_BCM5752 },
        { BCOM_VENDORID,        BCOM_DEVICEID_BCM5752M },
        { BCOM_VENDORID,        BCOM_DEVICEID_BCM5753 },
        { BCOM_VENDORID,        BCOM_DEVICEID_BCM5753F },
        { BCOM_VENDORID,        BCOM_DEVICEID_BCM5753M },
        { BCOM_VENDORID,        BCOM_DEVICEID_BCM5754 },
        { BCOM_VENDORID,        BCOM_DEVICEID_BCM5754M },
        { BCOM_VENDORID,        BCOM_DEVICEID_BCM5755 },
        { BCOM_VENDORID,        BCOM_DEVICEID_BCM5755M },
        { BCOM_VENDORID,        BCOM_DEVICEID_BCM5756 },
        { BCOM_VENDORID,        BCOM_DEVICEID_BCM5761 },
        { BCOM_VENDORID,        BCOM_DEVICEID_BCM5761E },
        { BCOM_VENDORID,        BCOM_DEVICEID_BCM5761S },
        { BCOM_VENDORID,        BCOM_DEVICEID_BCM5761SE },
        { BCOM_VENDORID,        BCOM_DEVICEID_BCM5762 },
        { BCOM_VENDORID,        BCOM_DEVICEID_BCM5764 },
        { BCOM_VENDORID,        BCOM_DEVICEID_BCM5780 },
        { BCOM_VENDORID,        BCOM_DEVICEID_BCM5780S },
        { BCOM_VENDORID,        BCOM_DEVICEID_BCM5781 },
        { BCOM_VENDORID,        BCOM_DEVICEID_BCM5782 },
        { BCOM_VENDORID,        BCOM_DEVICEID_BCM5784 },
        { BCOM_VENDORID,        BCOM_DEVICEID_BCM5785F },
        { BCOM_VENDORID,        BCOM_DEVICEID_BCM5785G },
        { BCOM_VENDORID,        BCOM_DEVICEID_BCM5786 },
        { BCOM_VENDORID,        BCOM_DEVICEID_BCM5787 },
        { BCOM_VENDORID,        BCOM_DEVICEID_BCM5787F },
        { BCOM_VENDORID,        BCOM_DEVICEID_BCM5787M },
        { BCOM_VENDORID,        BCOM_DEVICEID_BCM5788 },
        { BCOM_VENDORID,        BCOM_DEVICEID_BCM5789 },
        { BCOM_VENDORID,        BCOM_DEVICEID_BCM5901 },
        { BCOM_VENDORID,        BCOM_DEVICEID_BCM5901A2 },
        { BCOM_VENDORID,        BCOM_DEVICEID_BCM5903M },
        { BCOM_VENDORID,        BCOM_DEVICEID_BCM5906 },
        { BCOM_VENDORID,        BCOM_DEVICEID_BCM5906M },
        { BCOM_VENDORID,        BCOM_DEVICEID_BCM57760 },
        { BCOM_VENDORID,        BCOM_DEVICEID_BCM57761 },
        { BCOM_VENDORID,        BCOM_DEVICEID_BCM57762 },
        { BCOM_VENDORID,        BCOM_DEVICEID_BCM57764 },
        { BCOM_VENDORID,        BCOM_DEVICEID_BCM57765 },
        { BCOM_VENDORID,        BCOM_DEVICEID_BCM57766 },
        { BCOM_VENDORID,        BCOM_DEVICEID_BCM57767 },
        { BCOM_VENDORID,        BCOM_DEVICEID_BCM57780 },
        { BCOM_VENDORID,        BCOM_DEVICEID_BCM57781 },
        { BCOM_VENDORID,        BCOM_DEVICEID_BCM57782 },
        { BCOM_VENDORID,        BCOM_DEVICEID_BCM57785 },
        { BCOM_VENDORID,        BCOM_DEVICEID_BCM57786 },
        { BCOM_VENDORID,        BCOM_DEVICEID_BCM57787 },
        { BCOM_VENDORID,        BCOM_DEVICEID_BCM57788 },
        { BCOM_VENDORID,        BCOM_DEVICEID_BCM57790 },
        { BCOM_VENDORID,        BCOM_DEVICEID_BCM57791 },
        { BCOM_VENDORID,        BCOM_DEVICEID_BCM57795 },

        { SK_VENDORID,          SK_DEVICEID_ALTIMA },

        { TC_VENDORID,          TC_DEVICEID_3C996 },

        { FJTSU_VENDORID,       FJTSU_DEVICEID_PW008GE4 },
        { FJTSU_VENDORID,       FJTSU_DEVICEID_PW008GE5 },
        { FJTSU_VENDORID,       FJTSU_DEVICEID_PP250450 },

        { 0, 0 }
};

static const struct bge_vendor {
        uint16_t        v_id;
        const char      *v_name;
} bge_vendors[] = {
        { ALTEON_VENDORID,      "Alteon" },
        { ALTIMA_VENDORID,      "Altima" },
        { APPLE_VENDORID,       "Apple" },
        { BCOM_VENDORID,        "Broadcom" },
        { SK_VENDORID,          "SysKonnect" },
        { TC_VENDORID,          "3Com" },
        { FJTSU_VENDORID,       "Fujitsu" },

        { 0, NULL }
};

static const struct bge_revision {
        uint32_t        br_chipid;
        const char      *br_name;
} bge_revisions[] = {
        { BGE_CHIPID_BCM5700_A0,        "BCM5700 A0" },
        { BGE_CHIPID_BCM5700_A1,        "BCM5700 A1" },
        { BGE_CHIPID_BCM5700_B0,        "BCM5700 B0" },
        { BGE_CHIPID_BCM5700_B1,        "BCM5700 B1" },
        { BGE_CHIPID_BCM5700_B2,        "BCM5700 B2" },
        { BGE_CHIPID_BCM5700_B3,        "BCM5700 B3" },
        { BGE_CHIPID_BCM5700_ALTIMA,    "BCM5700 Altima" },
        { BGE_CHIPID_BCM5700_C0,        "BCM5700 C0" },
        { BGE_CHIPID_BCM5701_A0,        "BCM5701 A0" },
        { BGE_CHIPID_BCM5701_B0,        "BCM5701 B0" },
        { BGE_CHIPID_BCM5701_B2,        "BCM5701 B2" },
        { BGE_CHIPID_BCM5701_B5,        "BCM5701 B5" },
        { BGE_CHIPID_BCM5703_A0,        "BCM5703 A0" },
        { BGE_CHIPID_BCM5703_A1,        "BCM5703 A1" },
        { BGE_CHIPID_BCM5703_A2,        "BCM5703 A2" },
        { BGE_CHIPID_BCM5703_A3,        "BCM5703 A3" },
        { BGE_CHIPID_BCM5703_B0,        "BCM5703 B0" },
        { BGE_CHIPID_BCM5704_A0,        "BCM5704 A0" },
        { BGE_CHIPID_BCM5704_A1,        "BCM5704 A1" },
        { BGE_CHIPID_BCM5704_A2,        "BCM5704 A2" },
        { BGE_CHIPID_BCM5704_A3,        "BCM5704 A3" },
        { BGE_CHIPID_BCM5704_B0,        "BCM5704 B0" },
        { BGE_CHIPID_BCM5705_A0,        "BCM5705 A0" },
        { BGE_CHIPID_BCM5705_A1,        "BCM5705 A1" },
        { BGE_CHIPID_BCM5705_A2,        "BCM5705 A2" },
        { BGE_CHIPID_BCM5705_A3,        "BCM5705 A3" },
        { BGE_CHIPID_BCM5750_A0,        "BCM5750 A0" },
        { BGE_CHIPID_BCM5750_A1,        "BCM5750 A1" },
        { BGE_CHIPID_BCM5750_A3,        "BCM5750 A3" },
        { BGE_CHIPID_BCM5750_B0,        "BCM5750 B0" },
        { BGE_CHIPID_BCM5750_B1,        "BCM5750 B1" },
        { BGE_CHIPID_BCM5750_C0,        "BCM5750 C0" },
        { BGE_CHIPID_BCM5750_C1,        "BCM5750 C1" },
        { BGE_CHIPID_BCM5750_C2,        "BCM5750 C2" },
        { BGE_CHIPID_BCM5714_A0,        "BCM5714 A0" },
        { BGE_CHIPID_BCM5752_A0,        "BCM5752 A0" },
        { BGE_CHIPID_BCM5752_A1,        "BCM5752 A1" },
        { BGE_CHIPID_BCM5752_A2,        "BCM5752 A2" },
        { BGE_CHIPID_BCM5714_B0,        "BCM5714 B0" },
        { BGE_CHIPID_BCM5714_B3,        "BCM5714 B3" },
        { BGE_CHIPID_BCM5715_A0,        "BCM5715 A0" },
        { BGE_CHIPID_BCM5715_A1,        "BCM5715 A1" },
        { BGE_CHIPID_BCM5715_A3,        "BCM5715 A3" },
        { BGE_CHIPID_BCM5717_A0,        "BCM5717 A0" },
        { BGE_CHIPID_BCM5717_B0,        "BCM5717 B0" },
        { BGE_CHIPID_BCM5719_A0,        "BCM5719 A0" },
        { BGE_CHIPID_BCM5720_A0,        "BCM5720 A0" },
        { BGE_CHIPID_BCM5755_A0,        "BCM5755 A0" },
        { BGE_CHIPID_BCM5755_A1,        "BCM5755 A1" },
        { BGE_CHIPID_BCM5755_A2,        "BCM5755 A2" },
        { BGE_CHIPID_BCM5722_A0,        "BCM5722 A0" },
        { BGE_CHIPID_BCM5761_A0,        "BCM5761 A0" },
        { BGE_CHIPID_BCM5761_A1,        "BCM5761 A1" },
        { BGE_CHIPID_BCM5762_A0,        "BCM5762 A0" },
        { BGE_CHIPID_BCM5784_A0,        "BCM5784 A0" },
        { BGE_CHIPID_BCM5784_A1,        "BCM5784 A1" },
        /* 5754 and 5787 share the same ASIC ID */
        { BGE_CHIPID_BCM5787_A0,        "BCM5754/5787 A0" },
        { BGE_CHIPID_BCM5787_A1,        "BCM5754/5787 A1" },
        { BGE_CHIPID_BCM5787_A2,        "BCM5754/5787 A2" },
        { BGE_CHIPID_BCM5906_A1,        "BCM5906 A1" },
        { BGE_CHIPID_BCM5906_A2,        "BCM5906 A2" },
        { BGE_CHIPID_BCM57765_A0,       "BCM57765 A0" },
        { BGE_CHIPID_BCM57765_B0,       "BCM57765 B0" },
        { BGE_CHIPID_BCM57780_A0,       "BCM57780 A0" },
        { BGE_CHIPID_BCM57780_A1,       "BCM57780 A1" },

        { 0, NULL }
};

/*
 * Some defaults for major revisions, so that newer steppings
 * that we don't know about have a shot at working.
 */
static const struct bge_revision bge_majorrevs[] = {
        { BGE_ASICREV_BCM5700,          "unknown BCM5700" },
        { BGE_ASICREV_BCM5701,          "unknown BCM5701" },
        { BGE_ASICREV_BCM5703,          "unknown BCM5703" },
        { BGE_ASICREV_BCM5704,          "unknown BCM5704" },
        { BGE_ASICREV_BCM5705,          "unknown BCM5705" },
        { BGE_ASICREV_BCM5750,          "unknown BCM5750" },
        { BGE_ASICREV_BCM5714_A0,       "unknown BCM5714" },
        { BGE_ASICREV_BCM5752,          "unknown BCM5752" },
        { BGE_ASICREV_BCM5780,          "unknown BCM5780" },
        { BGE_ASICREV_BCM5714,          "unknown BCM5714" },
        { BGE_ASICREV_BCM5755,          "unknown BCM5755" },
        { BGE_ASICREV_BCM5761,          "unknown BCM5761" },
        { BGE_ASICREV_BCM5784,          "unknown BCM5784" },
        { BGE_ASICREV_BCM5785,          "unknown BCM5785" },
        /* 5754 and 5787 share the same ASIC ID */
        { BGE_ASICREV_BCM5787,          "unknown BCM5754/5787" },
        { BGE_ASICREV_BCM5906,          "unknown BCM5906" },
        { BGE_ASICREV_BCM57765,         "unknown BCM57765" },
        { BGE_ASICREV_BCM57766,         "unknown BCM57766" },
        { BGE_ASICREV_BCM57780,         "unknown BCM57780" },
        { BGE_ASICREV_BCM5717,          "unknown BCM5717" },
        { BGE_ASICREV_BCM5719,          "unknown BCM5719" },
        { BGE_ASICREV_BCM5720,          "unknown BCM5720" },
        { BGE_ASICREV_BCM5762,          "unknown BCM5762" },

        { 0, NULL }
};

#define BGE_IS_JUMBO_CAPABLE(sc)        ((sc)->bge_flags & BGE_FLAG_JUMBO)
#define BGE_IS_5700_FAMILY(sc)          ((sc)->bge_flags & BGE_FLAG_5700_FAMILY)
#define BGE_IS_5705_PLUS(sc)            ((sc)->bge_flags & BGE_FLAG_5705_PLUS)
#define BGE_IS_5714_FAMILY(sc)          ((sc)->bge_flags & BGE_FLAG_5714_FAMILY)
#define BGE_IS_575X_PLUS(sc)            ((sc)->bge_flags & BGE_FLAG_575X_PLUS)
#define BGE_IS_5755_PLUS(sc)            ((sc)->bge_flags & BGE_FLAG_5755_PLUS)
#define BGE_IS_5717_PLUS(sc)            ((sc)->bge_flags & BGE_FLAG_5717_PLUS)
#define BGE_IS_57765_PLUS(sc)           ((sc)->bge_flags & BGE_FLAG_57765_PLUS)

static uint32_t bge_chipid(device_t);
static const struct bge_vendor * bge_lookup_vendor(uint16_t);
static const struct bge_revision * bge_lookup_rev(uint32_t);

typedef int     (*bge_eaddr_fcn_t)(struct bge_softc *, uint8_t[]);

static int bge_probe(device_t);
static int bge_attach(device_t);
static int bge_detach(device_t);
static int bge_suspend(device_t);
static int bge_resume(device_t);
static void bge_release_resources(struct bge_softc *);
static void bge_dma_map_addr(void *, bus_dma_segment_t *, int, int);
static int bge_dma_alloc(struct bge_softc *);
static void bge_dma_free(struct bge_softc *);
static int bge_dma_ring_alloc(struct bge_softc *, bus_size_t, bus_size_t,
    bus_dma_tag_t *, uint8_t **, bus_dmamap_t *, bus_addr_t *, const char *);

static void bge_devinfo(struct bge_softc *);
static int bge_mbox_reorder(struct bge_softc *);

static int bge_get_eaddr_fw(struct bge_softc *sc, uint8_t ether_addr[]);
static int bge_get_eaddr_mem(struct bge_softc *, uint8_t[]);
static int bge_get_eaddr_nvram(struct bge_softc *, uint8_t[]);
static int bge_get_eaddr_eeprom(struct bge_softc *, uint8_t[]);
static int bge_get_eaddr(struct bge_softc *, uint8_t[]);

static void bge_txeof(struct bge_softc *, uint16_t);
static void bge_rxcsum(struct bge_softc *, struct bge_rx_bd *, struct mbuf *);
static int bge_rxeof(struct bge_softc *, uint16_t, int);

static void bge_asf_driver_up (struct bge_softc *);
static void bge_tick(void *);
static void bge_stats_clear_regs(struct bge_softc *);
static void bge_stats_update(struct bge_softc *);
static void bge_stats_update_regs(struct bge_softc *);
static struct mbuf *bge_check_short_dma(struct mbuf *);
static struct mbuf *bge_setup_tso(struct bge_softc *, struct mbuf *,
    uint16_t *, uint16_t *);
static int bge_encap(struct bge_softc *, struct mbuf **, uint32_t *);

static void bge_intr(void *);
static int bge_msi_intr(void *);
static void bge_intr_task(void *, int);
static void bge_start_locked(struct ifnet *);
static void bge_start(struct ifnet *);
static int bge_ioctl(struct ifnet *, u_long, caddr_t);
static void bge_init_locked(struct bge_softc *);
static void bge_init(void *);
static void bge_stop_block(struct bge_softc *, bus_size_t, uint32_t);
static void bge_stop(struct bge_softc *);
static void bge_watchdog(struct bge_softc *);
static int bge_shutdown(device_t);
static int bge_ifmedia_upd_locked(struct ifnet *);
static int bge_ifmedia_upd(struct ifnet *);
static void bge_ifmedia_sts(struct ifnet *, struct ifmediareq *);

static uint8_t bge_nvram_getbyte(struct bge_softc *, int, uint8_t *);
static int bge_read_nvram(struct bge_softc *, caddr_t, int, int);

static uint8_t bge_eeprom_getbyte(struct bge_softc *, int, uint8_t *);
static int bge_read_eeprom(struct bge_softc *, caddr_t, int, int);

static void bge_setpromisc(struct bge_softc *);
static void bge_setmulti(struct bge_softc *);
static void bge_setvlan(struct bge_softc *);

static __inline void bge_rxreuse_std(struct bge_softc *, int);
static __inline void bge_rxreuse_jumbo(struct bge_softc *, int);
static int bge_newbuf_std(struct bge_softc *, int);
static int bge_newbuf_jumbo(struct bge_softc *, int);
static int bge_init_rx_ring_std(struct bge_softc *);
static void bge_free_rx_ring_std(struct bge_softc *);
static int bge_init_rx_ring_jumbo(struct bge_softc *);
static void bge_free_rx_ring_jumbo(struct bge_softc *);
static void bge_free_tx_ring(struct bge_softc *);
static int bge_init_tx_ring(struct bge_softc *);

static int bge_chipinit(struct bge_softc *);
static int bge_blockinit(struct bge_softc *);
static uint32_t bge_dma_swap_options(struct bge_softc *);

static int bge_has_eaddr(struct bge_softc *);
static uint32_t bge_readmem_ind(struct bge_softc *, int);
static void bge_writemem_ind(struct bge_softc *, int, int);
static void bge_writembx(struct bge_softc *, int, int);
#ifdef notdef
static uint32_t bge_readreg_ind(struct bge_softc *, int);
#endif
static void bge_writemem_direct(struct bge_softc *, int, int);
static void bge_writereg_ind(struct bge_softc *, int, int);

static int bge_miibus_readreg(device_t, int, int);
static int bge_miibus_writereg(device_t, int, int, int);
static void bge_miibus_statchg(device_t);
#ifdef DEVICE_POLLING
static int bge_poll(struct ifnet *ifp, enum poll_cmd cmd, int count);
#endif

#define BGE_RESET_SHUTDOWN      0
#define BGE_RESET_START         1
#define BGE_RESET_SUSPEND       2
static void bge_sig_post_reset(struct bge_softc *, int);
static void bge_sig_legacy(struct bge_softc *, int);
static void bge_sig_pre_reset(struct bge_softc *, int);
static void bge_stop_fw(struct bge_softc *);
static int bge_reset(struct bge_softc *);
static void bge_link_upd(struct bge_softc *);

static void bge_ape_lock_init(struct bge_softc *);
static void bge_ape_read_fw_ver(struct bge_softc *);
static int bge_ape_lock(struct bge_softc *, int);
static void bge_ape_unlock(struct bge_softc *, int);
static void bge_ape_send_event(struct bge_softc *, uint32_t);
static void bge_ape_driver_state_change(struct bge_softc *, int);

/*
 * The BGE_REGISTER_DEBUG option is only for low-level debugging.  It may
 * leak information to untrusted users.  It is also known to cause alignment
 * traps on certain architectures.
 */
#ifdef BGE_REGISTER_DEBUG
static int bge_sysctl_debug_info(SYSCTL_HANDLER_ARGS);
static int bge_sysctl_reg_read(SYSCTL_HANDLER_ARGS);
static int bge_sysctl_ape_read(SYSCTL_HANDLER_ARGS);
static int bge_sysctl_mem_read(SYSCTL_HANDLER_ARGS);
#endif
static void bge_add_sysctls(struct bge_softc *);
static void bge_add_sysctl_stats_regs(struct bge_softc *,
    struct sysctl_ctx_list *, struct sysctl_oid_list *);
static void bge_add_sysctl_stats(struct bge_softc *, struct sysctl_ctx_list *,
    struct sysctl_oid_list *);
static int bge_sysctl_stats(SYSCTL_HANDLER_ARGS);

static device_method_t bge_methods[] = {
        /* Device interface */
        DEVMETHOD(device_probe,         bge_probe),
        DEVMETHOD(device_attach,        bge_attach),
        DEVMETHOD(device_detach,        bge_detach),
        DEVMETHOD(device_shutdown,      bge_shutdown),
        DEVMETHOD(device_suspend,       bge_suspend),
        DEVMETHOD(device_resume,        bge_resume),

        /* MII interface */
        DEVMETHOD(miibus_readreg,       bge_miibus_readreg),
        DEVMETHOD(miibus_writereg,      bge_miibus_writereg),
        DEVMETHOD(miibus_statchg,       bge_miibus_statchg),

        DEVMETHOD_END
};

static driver_t bge_driver = {
        "bge",
        bge_methods,
        sizeof(struct bge_softc)
};

static devclass_t bge_devclass;

DRIVER_MODULE(bge, pci, bge_driver, bge_devclass, 0, 0);
DRIVER_MODULE(miibus, bge, miibus_driver, miibus_devclass, 0, 0);

static int bge_allow_asf = 1;

TUNABLE_INT("hw.bge.allow_asf", &bge_allow_asf);

static SYSCTL_NODE(_hw, OID_AUTO, bge, CTLFLAG_RD, 0, "BGE driver parameters");
SYSCTL_INT(_hw_bge, OID_AUTO, allow_asf, CTLFLAG_RD, &bge_allow_asf, 0,
        "Allow ASF mode if available");

#define SPARC64_BLADE_1500_MODEL        "SUNW,Sun-Blade-1500"
#define SPARC64_BLADE_1500_PATH_BGE     "/pci@1f,700000/network@2"
#define SPARC64_BLADE_2500_MODEL        "SUNW,Sun-Blade-2500"
#define SPARC64_BLADE_2500_PATH_BGE     "/pci@1c,600000/network@3"
#define SPARC64_OFW_SUBVENDOR           "subsystem-vendor-id"

static int
bge_has_eaddr(struct bge_softc *sc)
{
#ifdef __sparc64__
        char buf[sizeof(SPARC64_BLADE_1500_PATH_BGE)];
        device_t dev;
        uint32_t subvendor;

        dev = sc->bge_dev;

        /*
         * The on-board BGEs found in sun4u machines aren't fitted with
         * an EEPROM which means that we have to obtain the MAC address
         * via OFW and that some tests will always fail.  We distinguish
         * such BGEs by the subvendor ID, which also has to be obtained
         * from OFW instead of the PCI configuration space as the latter
         * indicates Broadcom as the subvendor of the netboot interface.
         * For early Blade 1500 and 2500 we even have to check the OFW
         * device path as the subvendor ID always defaults to Broadcom
         * there.
         */
        if (OF_getprop(ofw_bus_get_node(dev), SPARC64_OFW_SUBVENDOR,
            &subvendor, sizeof(subvendor)) == sizeof(subvendor) &&
            (subvendor == FJTSU_VENDORID || subvendor == SUN_VENDORID))
                return (0);
        memset(buf, 0, sizeof(buf));
        if (OF_package_to_path(ofw_bus_get_node(dev), buf, sizeof(buf)) > 0) {
                if (strcmp(sparc64_model, SPARC64_BLADE_1500_MODEL) == 0 &&
                    strcmp(buf, SPARC64_BLADE_1500_PATH_BGE) == 0)
                        return (0);
                if (strcmp(sparc64_model, SPARC64_BLADE_2500_MODEL) == 0 &&
                    strcmp(buf, SPARC64_BLADE_2500_PATH_BGE) == 0)
                        return (0);
        }
#endif
        return (1);
}

static uint32_t
bge_readmem_ind(struct bge_softc *sc, int off)
{
        device_t dev;
        uint32_t val;

        if (sc->bge_asicrev == BGE_ASICREV_BCM5906 &&
            off >= BGE_STATS_BLOCK && off < BGE_SEND_RING_1_TO_4)
                return (0);

        dev = sc->bge_dev;

        pci_write_config(dev, BGE_PCI_MEMWIN_BASEADDR, off, 4);
        val = pci_read_config(dev, BGE_PCI_MEMWIN_DATA, 4);
        pci_write_config(dev, BGE_PCI_MEMWIN_BASEADDR, 0, 4);
        return (val);
}

static void
bge_writemem_ind(struct bge_softc *sc, int off, int val)
{
        device_t dev;

        if (sc->bge_asicrev == BGE_ASICREV_BCM5906 &&
            off >= BGE_STATS_BLOCK && off < BGE_SEND_RING_1_TO_4)
                return;

        dev = sc->bge_dev;

        pci_write_config(dev, BGE_PCI_MEMWIN_BASEADDR, off, 4);
        pci_write_config(dev, BGE_PCI_MEMWIN_DATA, val, 4);
        pci_write_config(dev, BGE_PCI_MEMWIN_BASEADDR, 0, 4);
}

#ifdef notdef
static uint32_t
bge_readreg_ind(struct bge_softc *sc, int off)
{
        device_t dev;

        dev = sc->bge_dev;

        pci_write_config(dev, BGE_PCI_REG_BASEADDR, off, 4);
        return (pci_read_config(dev, BGE_PCI_REG_DATA, 4));
}
#endif

static void
bge_writereg_ind(struct bge_softc *sc, int off, int val)
{
        device_t dev;

        dev = sc->bge_dev;

        pci_write_config(dev, BGE_PCI_REG_BASEADDR, off, 4);
        pci_write_config(dev, BGE_PCI_REG_DATA, val, 4);
}

static void
bge_writemem_direct(struct bge_softc *sc, int off, int val)
{
        CSR_WRITE_4(sc, off, val);
}

static void
bge_writembx(struct bge_softc *sc, int off, int val)
{
        if (sc->bge_asicrev == BGE_ASICREV_BCM5906)
                off += BGE_LPMBX_IRQ0_HI - BGE_MBX_IRQ0_HI;

        CSR_WRITE_4(sc, off, val);
        if ((sc->bge_flags & BGE_FLAG_MBOX_REORDER) != 0)
                CSR_READ_4(sc, off);
}

/*
 * Clear all stale locks and select the lock for this driver instance.
 */
static void
bge_ape_lock_init(struct bge_softc *sc)
{
        uint32_t bit, regbase;
        int i;

        if (sc->bge_asicrev == BGE_ASICREV_BCM5761)
                regbase = BGE_APE_LOCK_GRANT;
        else
                regbase = BGE_APE_PER_LOCK_GRANT;

        /* Clear any stale locks. */
        for (i = BGE_APE_LOCK_PHY0; i <= BGE_APE_LOCK_GPIO; i++) {
                switch (i) {
                case BGE_APE_LOCK_PHY0:
                case BGE_APE_LOCK_PHY1:
                case BGE_APE_LOCK_PHY2:
                case BGE_APE_LOCK_PHY3:
                        bit = BGE_APE_LOCK_GRANT_DRIVER0;
                        break;
                default:
                        if (sc->bge_func_addr == 0)
                                bit = BGE_APE_LOCK_GRANT_DRIVER0;
                        else
                                bit = (1 << sc->bge_func_addr);
                }
                APE_WRITE_4(sc, regbase + 4 * i, bit);
        }

        /* Select the PHY lock based on the device's function number. */
        switch (sc->bge_func_addr) {
        case 0:
                sc->bge_phy_ape_lock = BGE_APE_LOCK_PHY0;
                break;
        case 1:
                sc->bge_phy_ape_lock = BGE_APE_LOCK_PHY1;
                break;
        case 2:
                sc->bge_phy_ape_lock = BGE_APE_LOCK_PHY2;
                break;
        case 3:
                sc->bge_phy_ape_lock = BGE_APE_LOCK_PHY3;
                break;
        default:
                device_printf(sc->bge_dev,
                    "PHY lock not supported on this function\n");
        }
}

/*
 * Check for APE firmware, set flags, and print version info.
 */
static void
bge_ape_read_fw_ver(struct bge_softc *sc)
{
        const char *fwtype;
        uint32_t apedata, features;

        /* Check for a valid APE signature in shared memory. */
        apedata = APE_READ_4(sc, BGE_APE_SEG_SIG);
        if (apedata != BGE_APE_SEG_SIG_MAGIC) {
                sc->bge_mfw_flags &= ~ BGE_MFW_ON_APE;
                return;
        }

        /* Check if APE firmware is running. */
        apedata = APE_READ_4(sc, BGE_APE_FW_STATUS);
        if ((apedata & BGE_APE_FW_STATUS_READY) == 0) {
                device_printf(sc->bge_dev, "APE signature found "
                    "but FW status not ready! 0x%08x\n", apedata);
                return;
        }

        sc->bge_mfw_flags |= BGE_MFW_ON_APE;

        /* Fetch the APE firwmare type and version. */
        apedata = APE_READ_4(sc, BGE_APE_FW_VERSION);
        features = APE_READ_4(sc, BGE_APE_FW_FEATURES);
        if ((features & BGE_APE_FW_FEATURE_NCSI) != 0) {
                sc->bge_mfw_flags |= BGE_MFW_TYPE_NCSI;
                fwtype = "NCSI";
        } else if ((features & BGE_APE_FW_FEATURE_DASH) != 0) {
                sc->bge_mfw_flags |= BGE_MFW_TYPE_DASH;
                fwtype = "DASH";
        } else
                fwtype = "UNKN";

        /* Print the APE firmware version. */
        device_printf(sc->bge_dev, "APE FW version: %s v%d.%d.%d.%d\n",
            fwtype,
            (apedata & BGE_APE_FW_VERSION_MAJMSK) >> BGE_APE_FW_VERSION_MAJSFT,
            (apedata & BGE_APE_FW_VERSION_MINMSK) >> BGE_APE_FW_VERSION_MINSFT,
            (apedata & BGE_APE_FW_VERSION_REVMSK) >> BGE_APE_FW_VERSION_REVSFT,
            (apedata & BGE_APE_FW_VERSION_BLDMSK));
}

static int
bge_ape_lock(struct bge_softc *sc, int locknum)
{
        uint32_t bit, gnt, req, status;
        int i, off;

        if ((sc->bge_mfw_flags & BGE_MFW_ON_APE) == 0)
                return (0);

        /* Lock request/grant registers have different bases. */
        if (sc->bge_asicrev == BGE_ASICREV_BCM5761) {
                req = BGE_APE_LOCK_REQ;
                gnt = BGE_APE_LOCK_GRANT;
        } else {
                req = BGE_APE_PER_LOCK_REQ;
                gnt = BGE_APE_PER_LOCK_GRANT;
        }

        off = 4 * locknum;

        switch (locknum) {
        case BGE_APE_LOCK_GPIO:
                /* Lock required when using GPIO. */
                if (sc->bge_asicrev == BGE_ASICREV_BCM5761)
                        return (0);
                if (sc->bge_func_addr == 0)
                        bit = BGE_APE_LOCK_REQ_DRIVER0;
                else
                        bit = (1 << sc->bge_func_addr);
                break;
        case BGE_APE_LOCK_GRC:
                /* Lock required to reset the device. */
                if (sc->bge_func_addr == 0)
                        bit = BGE_APE_LOCK_REQ_DRIVER0;
                else
                        bit = (1 << sc->bge_func_addr);
                break;
        case BGE_APE_LOCK_MEM:
                /* Lock required when accessing certain APE memory. */
                if (sc->bge_func_addr == 0)
                        bit = BGE_APE_LOCK_REQ_DRIVER0;
                else
                        bit = (1 << sc->bge_func_addr);
                break;
        case BGE_APE_LOCK_PHY0:
        case BGE_APE_LOCK_PHY1:
        case BGE_APE_LOCK_PHY2:
        case BGE_APE_LOCK_PHY3:
                /* Lock required when accessing PHYs. */
                bit = BGE_APE_LOCK_REQ_DRIVER0;
                break;
        default:
                return (EINVAL);
        }

        /* Request a lock. */
        APE_WRITE_4(sc, req + off, bit);

        /* Wait up to 1 second to acquire lock. */
        for (i = 0; i < 20000; i++) {
                status = APE_READ_4(sc, gnt + off);
                if (status == bit)
                        break;
                DELAY(50);
        }

        /* Handle any errors. */
        if (status != bit) {
                device_printf(sc->bge_dev, "APE lock %d request failed! "
                    "request = 0x%04x[0x%04x], status = 0x%04x[0x%04x]\n",
                    locknum, req + off, bit & 0xFFFF, gnt + off,
                    status & 0xFFFF);
                /* Revoke the lock request. */
                APE_WRITE_4(sc, gnt + off, bit);
                return (EBUSY);
        }

        return (0);
}

static void
bge_ape_unlock(struct bge_softc *sc, int locknum)
{
        uint32_t bit, gnt;
        int off;

        if ((sc->bge_mfw_flags & BGE_MFW_ON_APE) == 0)
                return;

        if (sc->bge_asicrev == BGE_ASICREV_BCM5761)
                gnt = BGE_APE_LOCK_GRANT;
        else
                gnt = BGE_APE_PER_LOCK_GRANT;

        off = 4 * locknum;

        switch (locknum) {
        case BGE_APE_LOCK_GPIO:
                if (sc->bge_asicrev == BGE_ASICREV_BCM5761)
                        return;
                if (sc->bge_func_addr == 0)
                        bit = BGE_APE_LOCK_GRANT_DRIVER0;
                else
                        bit = (1 << sc->bge_func_addr);
                break;
        case BGE_APE_LOCK_GRC:
                if (sc->bge_func_addr == 0)
                        bit = BGE_APE_LOCK_GRANT_DRIVER0;
                else
                        bit = (1 << sc->bge_func_addr);
                break;
        case BGE_APE_LOCK_MEM:
                if (sc->bge_func_addr == 0)
                        bit = BGE_APE_LOCK_GRANT_DRIVER0;
                else
                        bit = (1 << sc->bge_func_addr);
                break;
        case BGE_APE_LOCK_PHY0:
        case BGE_APE_LOCK_PHY1:
        case BGE_APE_LOCK_PHY2:
        case BGE_APE_LOCK_PHY3:
                bit = BGE_APE_LOCK_GRANT_DRIVER0;
                break;
        default:
                return;
        }

        APE_WRITE_4(sc, gnt + off, bit);
}

/*
 * Send an event to the APE firmware.
 */
static void
bge_ape_send_event(struct bge_softc *sc, uint32_t event)
{
        uint32_t apedata;
        int i;

        /* NCSI does not support APE events. */
        if ((sc->bge_mfw_flags & BGE_MFW_ON_APE) == 0)
                return;

        /* Wait up to 1ms for APE to service previous event. */
        for (i = 10; i > 0; i--) {
                if (bge_ape_lock(sc, BGE_APE_LOCK_MEM) != 0)
                        break;
                apedata = APE_READ_4(sc, BGE_APE_EVENT_STATUS);
                if ((apedata & BGE_APE_EVENT_STATUS_EVENT_PENDING) == 0) {
                        APE_WRITE_4(sc, BGE_APE_EVENT_STATUS, event |
                            BGE_APE_EVENT_STATUS_EVENT_PENDING);
                        bge_ape_unlock(sc, BGE_APE_LOCK_MEM);
                        APE_WRITE_4(sc, BGE_APE_EVENT, BGE_APE_EVENT_1);
                        break;
                }
                bge_ape_unlock(sc, BGE_APE_LOCK_MEM);
                DELAY(100);
        }
        if (i == 0)
                device_printf(sc->bge_dev, "APE event 0x%08x send timed out\n",
                    event);
}

static void
bge_ape_driver_state_change(struct bge_softc *sc, int kind)
{
        uint32_t apedata, event;

        if ((sc->bge_mfw_flags & BGE_MFW_ON_APE) == 0)
                return;

        switch (kind) {
        case BGE_RESET_START:
                /* If this is the first load, clear the load counter. */
                apedata = APE_READ_4(sc, BGE_APE_HOST_SEG_SIG);
                if (apedata != BGE_APE_HOST_SEG_SIG_MAGIC)
                        APE_WRITE_4(sc, BGE_APE_HOST_INIT_COUNT, 0);
                else {
                        apedata = APE_READ_4(sc, BGE_APE_HOST_INIT_COUNT);
                        APE_WRITE_4(sc, BGE_APE_HOST_INIT_COUNT, ++apedata);
                }
                APE_WRITE_4(sc, BGE_APE_HOST_SEG_SIG,
                    BGE_APE_HOST_SEG_SIG_MAGIC);
                APE_WRITE_4(sc, BGE_APE_HOST_SEG_LEN,
                    BGE_APE_HOST_SEG_LEN_MAGIC);

                /* Add some version info if bge(4) supports it. */
                APE_WRITE_4(sc, BGE_APE_HOST_DRIVER_ID,
                    BGE_APE_HOST_DRIVER_ID_MAGIC(1, 0));
                APE_WRITE_4(sc, BGE_APE_HOST_BEHAVIOR,
                    BGE_APE_HOST_BEHAV_NO_PHYLOCK);
                APE_WRITE_4(sc, BGE_APE_HOST_HEARTBEAT_INT_MS,
                    BGE_APE_HOST_HEARTBEAT_INT_DISABLE);
                APE_WRITE_4(sc, BGE_APE_HOST_DRVR_STATE,
                    BGE_APE_HOST_DRVR_STATE_START);
                event = BGE_APE_EVENT_STATUS_STATE_START;
                break;
        case BGE_RESET_SHUTDOWN:
                APE_WRITE_4(sc, BGE_APE_HOST_DRVR_STATE,
                    BGE_APE_HOST_DRVR_STATE_UNLOAD);
                event = BGE_APE_EVENT_STATUS_STATE_UNLOAD;
                break;
        case BGE_RESET_SUSPEND:
                event = BGE_APE_EVENT_STATUS_STATE_SUSPEND;
                break;
        default:
                return;
        }

        bge_ape_send_event(sc, event | BGE_APE_EVENT_STATUS_DRIVER_EVNT |
            BGE_APE_EVENT_STATUS_STATE_CHNGE);
}

/*
 * Map a single buffer address.
 */

static void
bge_dma_map_addr(void *arg, bus_dma_segment_t *segs, int nseg, int error)
{
        struct bge_dmamap_arg *ctx;

        if (error)
                return;

        KASSERT(nseg == 1, ("%s: %d segments returned!", __func__, nseg));

        ctx = arg;
        ctx->bge_busaddr = segs->ds_addr;
}

static uint8_t
bge_nvram_getbyte(struct bge_softc *sc, int addr, uint8_t *dest)
{
        uint32_t access, byte = 0;
        int i;

        /* Lock. */
        CSR_WRITE_4(sc, BGE_NVRAM_SWARB, BGE_NVRAMSWARB_SET1);
        for (i = 0; i < 8000; i++) {
                if (CSR_READ_4(sc, BGE_NVRAM_SWARB) & BGE_NVRAMSWARB_GNT1)
                        break;
                DELAY(20);
        }
        if (i == 8000)
                return (1);

        /* Enable access. */
        access = CSR_READ_4(sc, BGE_NVRAM_ACCESS);
        CSR_WRITE_4(sc, BGE_NVRAM_ACCESS, access | BGE_NVRAMACC_ENABLE);

        CSR_WRITE_4(sc, BGE_NVRAM_ADDR, addr & 0xfffffffc);
        CSR_WRITE_4(sc, BGE_NVRAM_CMD, BGE_NVRAM_READCMD);
        for (i = 0; i < BGE_TIMEOUT * 10; i++) {
                DELAY(10);
                if (CSR_READ_4(sc, BGE_NVRAM_CMD) & BGE_NVRAMCMD_DONE) {
                        DELAY(10);
                        break;
                }
        }

        if (i == BGE_TIMEOUT * 10) {
                if_printf(sc->bge_ifp, "nvram read timed out\n");
                return (1);
        }

        /* Get result. */
        byte = CSR_READ_4(sc, BGE_NVRAM_RDDATA);

        *dest = (bswap32(byte) >> ((addr % 4) * 8)) & 0xFF;

        /* Disable access. */
        CSR_WRITE_4(sc, BGE_NVRAM_ACCESS, access);

        /* Unlock. */
        CSR_WRITE_4(sc, BGE_NVRAM_SWARB, BGE_NVRAMSWARB_CLR1);
        CSR_READ_4(sc, BGE_NVRAM_SWARB);

        return (0);
}

/*
 * Read a sequence of bytes from NVRAM.
 */
static int
bge_read_nvram(struct bge_softc *sc, caddr_t dest, int off, int cnt)
{
        int err = 0, i;
        uint8_t byte = 0;

        if (sc->bge_asicrev != BGE_ASICREV_BCM5906)
                return (1);

        for (i = 0; i < cnt; i++) {
                err = bge_nvram_getbyte(sc, off + i, &byte);
                if (err)
                        break;
                *(dest + i) = byte;
        }

        return (err ? 1 : 0);
}

/*
 * Read a byte of data stored in the EEPROM at address 'addr.' The
 * BCM570x supports both the traditional bitbang interface and an
 * auto access interface for reading the EEPROM. We use the auto
 * access method.
 */
static uint8_t
bge_eeprom_getbyte(struct bge_softc *sc, int addr, uint8_t *dest)
{
        int i;
        uint32_t byte = 0;

        /*
         * Enable use of auto EEPROM access so we can avoid
         * having to use the bitbang method.
         */
        BGE_SETBIT(sc, BGE_MISC_LOCAL_CTL, BGE_MLC_AUTO_EEPROM);

        /* Reset the EEPROM, load the clock period. */
        CSR_WRITE_4(sc, BGE_EE_ADDR,
            BGE_EEADDR_RESET | BGE_EEHALFCLK(BGE_HALFCLK_384SCL));
        DELAY(20);

        /* Issue the read EEPROM command. */
        CSR_WRITE_4(sc, BGE_EE_ADDR, BGE_EE_READCMD | addr);

        /* Wait for completion */
        for(i = 0; i < BGE_TIMEOUT * 10; i++) {
                DELAY(10);
                if (CSR_READ_4(sc, BGE_EE_ADDR) & BGE_EEADDR_DONE)
                        break;
        }

        if (i == BGE_TIMEOUT * 10) {
                device_printf(sc->bge_dev, "EEPROM read timed out\n");
                return (1);
        }

        /* Get result. */
        byte = CSR_READ_4(sc, BGE_EE_DATA);

        *dest = (byte >> ((addr % 4) * 8)) & 0xFF;

        return (0);
}

/*
 * Read a sequence of bytes from the EEPROM.
 */
static int
bge_read_eeprom(struct bge_softc *sc, caddr_t dest, int off, int cnt)
{
        int i, error = 0;
        uint8_t byte = 0;

        for (i = 0; i < cnt; i++) {
                error = bge_eeprom_getbyte(sc, off + i, &byte);
                if (error)
                        break;
                *(dest + i) = byte;
        }

        return (error ? 1 : 0);
}

static int
bge_miibus_readreg(device_t dev, int phy, int reg)
{
        struct bge_softc *sc;
        uint32_t val;
        int i;

        sc = device_get_softc(dev);

        if (bge_ape_lock(sc, sc->bge_phy_ape_lock) != 0)
                return (0);

        /* Clear the autopoll bit if set, otherwise may trigger PCI errors. */
        if ((sc->bge_mi_mode & BGE_MIMODE_AUTOPOLL) != 0) {
                CSR_WRITE_4(sc, BGE_MI_MODE,
                    sc->bge_mi_mode & ~BGE_MIMODE_AUTOPOLL);
                DELAY(80);
        }

        CSR_WRITE_4(sc, BGE_MI_COMM, BGE_MICMD_READ | BGE_MICOMM_BUSY |
            BGE_MIPHY(phy) | BGE_MIREG(reg));

        /* Poll for the PHY register access to complete. */
        for (i = 0; i < BGE_TIMEOUT; i++) {
                DELAY(10);
                val = CSR_READ_4(sc, BGE_MI_COMM);
                if ((val & BGE_MICOMM_BUSY) == 0) {
                        DELAY(5);
                        val = CSR_READ_4(sc, BGE_MI_COMM);
                        break;
                }
        }

        if (i == BGE_TIMEOUT) {
                device_printf(sc->bge_dev,
                    "PHY read timed out (phy %d, reg %d, val 0x%08x)\n",
                    phy, reg, val);
                val = 0;
        }

        /* Restore the autopoll bit if necessary. */
        if ((sc->bge_mi_mode & BGE_MIMODE_AUTOPOLL) != 0) {
                CSR_WRITE_4(sc, BGE_MI_MODE, sc->bge_mi_mode);
                DELAY(80);
        }

        bge_ape_unlock(sc, sc->bge_phy_ape_lock);

        if (val & BGE_MICOMM_READFAIL)
                return (0);

        return (val & 0xFFFF);
}

static int
bge_miibus_writereg(device_t dev, int phy, int reg, int val)
{
        struct bge_softc *sc;
        int i;

        sc = device_get_softc(dev);

        if (sc->bge_asicrev == BGE_ASICREV_BCM5906 &&
            (reg == BRGPHY_MII_1000CTL || reg == BRGPHY_MII_AUXCTL))
                return (0);

        if (bge_ape_lock(sc, sc->bge_phy_ape_lock) != 0)
                return (0);

        /* Clear the autopoll bit if set, otherwise may trigger PCI errors. */
        if ((sc->bge_mi_mode & BGE_MIMODE_AUTOPOLL) != 0) {
                CSR_WRITE_4(sc, BGE_MI_MODE,
                    sc->bge_mi_mode & ~BGE_MIMODE_AUTOPOLL);
                DELAY(80);
        }

        CSR_WRITE_4(sc, BGE_MI_COMM, BGE_MICMD_WRITE | BGE_MICOMM_BUSY |
            BGE_MIPHY(phy) | BGE_MIREG(reg) | val);

        for (i = 0; i < BGE_TIMEOUT; i++) {
                DELAY(10);
                if (!(CSR_READ_4(sc, BGE_MI_COMM) & BGE_MICOMM_BUSY)) {
                        DELAY(5);
                        CSR_READ_4(sc, BGE_MI_COMM); /* dummy read */
                        break;
                }
        }

        /* Restore the autopoll bit if necessary. */
        if ((sc->bge_mi_mode & BGE_MIMODE_AUTOPOLL) != 0) {
                CSR_WRITE_4(sc, BGE_MI_MODE, sc->bge_mi_mode);
                DELAY(80);
        }

        bge_ape_unlock(sc, sc->bge_phy_ape_lock);

        if (i == BGE_TIMEOUT)
                device_printf(sc->bge_dev,
                    "PHY write timed out (phy %d, reg %d, val 0x%04x)\n",
                    phy, reg, val);

        return (0);
}

static void
bge_miibus_statchg(device_t dev)
{
        struct bge_softc *sc;
        struct mii_data *mii;
        uint32_t mac_mode, rx_mode, tx_mode;

        sc = device_get_softc(dev);
        if ((sc->bge_ifp->if_drv_flags & IFF_DRV_RUNNING) == 0)
                return;
        mii = device_get_softc(sc->bge_miibus);

        if ((mii->mii_media_status & (IFM_ACTIVE | IFM_AVALID)) ==
            (IFM_ACTIVE | IFM_AVALID)) {
                switch (IFM_SUBTYPE(mii->mii_media_active)) {
                case IFM_10_T:
                case IFM_100_TX:
                        sc->bge_link = 1;
                        break;
                case IFM_1000_T:
                case IFM_1000_SX:
                case IFM_2500_SX:
                        if (sc->bge_asicrev != BGE_ASICREV_BCM5906)
                                sc->bge_link = 1;
                        else
                                sc->bge_link = 0;
                        break;
                default:
                        sc->bge_link = 0;
                        break;
                }
        } else
                sc->bge_link = 0;
        if (sc->bge_link == 0)
                return;

        /*
         * APE firmware touches these registers to keep the MAC
         * connected to the outside world.  Try to keep the
         * accesses atomic.
         */

        /* Set the port mode (MII/GMII) to match the link speed. */
        mac_mode = CSR_READ_4(sc, BGE_MAC_MODE) &
            ~(BGE_MACMODE_PORTMODE | BGE_MACMODE_HALF_DUPLEX);
        tx_mode = CSR_READ_4(sc, BGE_TX_MODE);
        rx_mode = CSR_READ_4(sc, BGE_RX_MODE);

        if (IFM_SUBTYPE(mii->mii_media_active) == IFM_1000_T ||
            IFM_SUBTYPE(mii->mii_media_active) == IFM_1000_SX)
                mac_mode |= BGE_PORTMODE_GMII;
        else
                mac_mode |= BGE_PORTMODE_MII;

        /* Set MAC flow control behavior to match link flow control settings. */
        tx_mode &= ~BGE_TXMODE_FLOWCTL_ENABLE;
        rx_mode &= ~BGE_RXMODE_FLOWCTL_ENABLE;
        if ((IFM_OPTIONS(mii->mii_media_active) & IFM_FDX) != 0) {
                if ((IFM_OPTIONS(mii->mii_media_active) & IFM_ETH_TXPAUSE) != 0)
                        tx_mode |= BGE_TXMODE_FLOWCTL_ENABLE;
                if ((IFM_OPTIONS(mii->mii_media_active) & IFM_ETH_RXPAUSE) != 0)
                        rx_mode |= BGE_RXMODE_FLOWCTL_ENABLE;
        } else
                mac_mode |= BGE_MACMODE_HALF_DUPLEX;

        CSR_WRITE_4(sc, BGE_MAC_MODE, mac_mode);
        DELAY(40);
        CSR_WRITE_4(sc, BGE_TX_MODE, tx_mode);
        CSR_WRITE_4(sc, BGE_RX_MODE, rx_mode);
}

/*
 * Intialize a standard receive ring descriptor.
 */
static int
bge_newbuf_std(struct bge_softc *sc, int i)
{
        struct mbuf *m;
        struct bge_rx_bd *r;
        bus_dma_segment_t segs[1];
        bus_dmamap_t map;
        int error, nsegs;

        if (sc->bge_flags & BGE_FLAG_JUMBO_STD &&
            (sc->bge_ifp->if_mtu + ETHER_HDR_LEN + ETHER_CRC_LEN +
            ETHER_VLAN_ENCAP_LEN > (MCLBYTES - ETHER_ALIGN))) {
                m = m_getjcl(M_NOWAIT, MT_DATA, M_PKTHDR, MJUM9BYTES);
                if (m == NULL)
                        return (ENOBUFS);
                m->m_len = m->m_pkthdr.len = MJUM9BYTES;
        } else {
                m = m_getcl(M_NOWAIT, MT_DATA, M_PKTHDR);
                if (m == NULL)
                        return (ENOBUFS);
                m->m_len = m->m_pkthdr.len = MCLBYTES;
        }
        if ((sc->bge_flags & BGE_FLAG_RX_ALIGNBUG) == 0)
                m_adj(m, ETHER_ALIGN);

        error = bus_dmamap_load_mbuf_sg(sc->bge_cdata.bge_rx_mtag,
            sc->bge_cdata.bge_rx_std_sparemap, m, segs, &nsegs, 0);
        if (error != 0) {
                m_freem(m);
                return (error);
        }
        if (sc->bge_cdata.bge_rx_std_chain[i] != NULL) {
                bus_dmamap_sync(sc->bge_cdata.bge_rx_mtag,
                    sc->bge_cdata.bge_rx_std_dmamap[i], BUS_DMASYNC_POSTREAD);
                bus_dmamap_unload(sc->bge_cdata.bge_rx_mtag,
                    sc->bge_cdata.bge_rx_std_dmamap[i]);
        }
        map = sc->bge_cdata.bge_rx_std_dmamap[i];
        sc->bge_cdata.bge_rx_std_dmamap[i] = sc->bge_cdata.bge_rx_std_sparemap;
        sc->bge_cdata.bge_rx_std_sparemap = map;
        sc->bge_cdata.bge_rx_std_chain[i] = m;
        sc->bge_cdata.bge_rx_std_seglen[i] = segs[0].ds_len;
        r = &sc->bge_ldata.bge_rx_std_ring[sc->bge_std];
        r->bge_addr.bge_addr_lo = BGE_ADDR_LO(segs[0].ds_addr);
        r->bge_addr.bge_addr_hi = BGE_ADDR_HI(segs[0].ds_addr);
        r->bge_flags = BGE_RXBDFLAG_END;
        r->bge_len = segs[0].ds_len;
        r->bge_idx = i;

        bus_dmamap_sync(sc->bge_cdata.bge_rx_mtag,
            sc->bge_cdata.bge_rx_std_dmamap[i], BUS_DMASYNC_PREREAD);

        return (0);
}

/*
 * Initialize a jumbo receive ring descriptor. This allocates
 * a jumbo buffer from the pool managed internally by the driver.
 */
static int
bge_newbuf_jumbo(struct bge_softc *sc, int i)
{
        bus_dma_segment_t segs[BGE_NSEG_JUMBO];
        bus_dmamap_t map;
        struct bge_extrx_bd *r;
        struct mbuf *m;
        int error, nsegs;

        MGETHDR(m, M_NOWAIT, MT_DATA);
        if (m == NULL)
                return (ENOBUFS);

        m_cljget(m, M_NOWAIT, MJUM9BYTES);
        if (!(m->m_flags & M_EXT)) {
                m_freem(m);
                return (ENOBUFS);
        }
        m->m_len = m->m_pkthdr.len = MJUM9BYTES;
        if ((sc->bge_flags & BGE_FLAG_RX_ALIGNBUG) == 0)
                m_adj(m, ETHER_ALIGN);

        error = bus_dmamap_load_mbuf_sg(sc->bge_cdata.bge_mtag_jumbo,
            sc->bge_cdata.bge_rx_jumbo_sparemap, m, segs, &nsegs, 0);
        if (error != 0) {
                m_freem(m);
                return (error);
        }

        if (sc->bge_cdata.bge_rx_jumbo_chain[i] != NULL) {
                bus_dmamap_sync(sc->bge_cdata.bge_mtag_jumbo,
                    sc->bge_cdata.bge_rx_jumbo_dmamap[i], BUS_DMASYNC_POSTREAD);
                bus_dmamap_unload(sc->bge_cdata.bge_mtag_jumbo,
                    sc->bge_cdata.bge_rx_jumbo_dmamap[i]);
        }
        map = sc->bge_cdata.bge_rx_jumbo_dmamap[i];
        sc->bge_cdata.bge_rx_jumbo_dmamap[i] =
            sc->bge_cdata.bge_rx_jumbo_sparemap;
        sc->bge_cdata.bge_rx_jumbo_sparemap = map;
        sc->bge_cdata.bge_rx_jumbo_chain[i] = m;
        sc->bge_cdata.bge_rx_jumbo_seglen[i][0] = 0;
        sc->bge_cdata.bge_rx_jumbo_seglen[i][1] = 0;
        sc->bge_cdata.bge_rx_jumbo_seglen[i][2] = 0;
        sc->bge_cdata.bge_rx_jumbo_seglen[i][3] = 0;

        /*
         * Fill in the extended RX buffer descriptor.
         */
        r = &sc->bge_ldata.bge_rx_jumbo_ring[sc->bge_jumbo];
        r->bge_flags = BGE_RXBDFLAG_JUMBO_RING | BGE_RXBDFLAG_END;
        r->bge_idx = i;
        r->bge_len3 = r->bge_len2 = r->bge_len1 = 0;
        switch (nsegs) {
        case 4:
                r->bge_addr3.bge_addr_lo = BGE_ADDR_LO(segs[3].ds_addr);
                r->bge_addr3.bge_addr_hi = BGE_ADDR_HI(segs[3].ds_addr);
                r->bge_len3 = segs[3].ds_len;
                sc->bge_cdata.bge_rx_jumbo_seglen[i][3] = segs[3].ds_len;
        case 3:
                r->bge_addr2.bge_addr_lo = BGE_ADDR_LO(segs[2].ds_addr);
                r->bge_addr2.bge_addr_hi = BGE_ADDR_HI(segs[2].ds_addr);
                r->bge_len2 = segs[2].ds_len;
                sc->bge_cdata.bge_rx_jumbo_seglen[i][2] = segs[2].ds_len;
        case 2:
                r->bge_addr1.bge_addr_lo = BGE_ADDR_LO(segs[1].ds_addr);
                r->bge_addr1.bge_addr_hi = BGE_ADDR_HI(segs[1].ds_addr);
                r->bge_len1 = segs[1].ds_len;
                sc->bge_cdata.bge_rx_jumbo_seglen[i][1] = segs[1].ds_len;
        case 1:
                r->bge_addr0.bge_addr_lo = BGE_ADDR_LO(segs[0].ds_addr);
                r->bge_addr0.bge_addr_hi = BGE_ADDR_HI(segs[0].ds_addr);
                r->bge_len0 = segs[0].ds_len;
                sc->bge_cdata.bge_rx_jumbo_seglen[i][0] = segs[0].ds_len;
                break;
        default:
                panic("%s: %d segments\n", __func__, nsegs);
        }

        bus_dmamap_sync(sc->bge_cdata.bge_mtag_jumbo,
            sc->bge_cdata.bge_rx_jumbo_dmamap[i], BUS_DMASYNC_PREREAD);

        return (0);
}

static int
bge_init_rx_ring_std(struct bge_softc *sc)
{
        int error, i;

        bzero(sc->bge_ldata.bge_rx_std_ring, BGE_STD_RX_RING_SZ);
        sc->bge_std = 0;
        for (i = 0; i < BGE_STD_RX_RING_CNT; i++) {
                if ((error = bge_newbuf_std(sc, i)) != 0)
                        return (error);
                BGE_INC(sc->bge_std, BGE_STD_RX_RING_CNT);
        }

        bus_dmamap_sync(sc->bge_cdata.bge_rx_std_ring_tag,
            sc->bge_cdata.bge_rx_std_ring_map, BUS_DMASYNC_PREWRITE);

        sc->bge_std = 0;
        bge_writembx(sc, BGE_MBX_RX_STD_PROD_LO, BGE_STD_RX_RING_CNT - 1);

        return (0);
}

static void
bge_free_rx_ring_std(struct bge_softc *sc)
{
        int i;

        for (i = 0; i < BGE_STD_RX_RING_CNT; i++) {
                if (sc->bge_cdata.bge_rx_std_chain[i] != NULL) {
                        bus_dmamap_sync(sc->bge_cdata.bge_rx_mtag,
                            sc->bge_cdata.bge_rx_std_dmamap[i],
                            BUS_DMASYNC_POSTREAD);
                        bus_dmamap_unload(sc->bge_cdata.bge_rx_mtag,
                            sc->bge_cdata.bge_rx_std_dmamap[i]);
                        m_freem(sc->bge_cdata.bge_rx_std_chain[i]);
                        sc->bge_cdata.bge_rx_std_chain[i] = NULL;
                }
                bzero((char *)&sc->bge_ldata.bge_rx_std_ring[i],
                    sizeof(struct bge_rx_bd));
        }
}

static int
bge_init_rx_ring_jumbo(struct bge_softc *sc)
{
        struct bge_rcb *rcb;
        int error, i;

        bzero(sc->bge_ldata.bge_rx_jumbo_ring, BGE_JUMBO_RX_RING_SZ);
        sc->bge_jumbo = 0;
        for (i = 0; i < BGE_JUMBO_RX_RING_CNT; i++) {
                if ((error = bge_newbuf_jumbo(sc, i)) != 0)
                        return (error);
                BGE_INC(sc->bge_jumbo, BGE_JUMBO_RX_RING_CNT);
        }

        bus_dmamap_sync(sc->bge_cdata.bge_rx_jumbo_ring_tag,
            sc->bge_cdata.bge_rx_jumbo_ring_map, BUS_DMASYNC_PREWRITE);

        sc->bge_jumbo = 0;

        /* Enable the jumbo receive producer ring. */
        rcb = &sc->bge_ldata.bge_info.bge_jumbo_rx_rcb;
        rcb->bge_maxlen_flags =
            BGE_RCB_MAXLEN_FLAGS(0, BGE_RCB_FLAG_USE_EXT_RX_BD);
        CSR_WRITE_4(sc, BGE_RX_JUMBO_RCB_MAXLEN_FLAGS, rcb->bge_maxlen_flags);

        bge_writembx(sc, BGE_MBX_RX_JUMBO_PROD_LO, BGE_JUMBO_RX_RING_CNT - 1);

        return (0);
}

static void
bge_free_rx_ring_jumbo(struct bge_softc *sc)
{
        int i;

        for (i = 0; i < BGE_JUMBO_RX_RING_CNT; i++) {
                if (sc->bge_cdata.bge_rx_jumbo_chain[i] != NULL) {
                        bus_dmamap_sync(sc->bge_cdata.bge_mtag_jumbo,
                            sc->bge_cdata.bge_rx_jumbo_dmamap[i],
                            BUS_DMASYNC_POSTREAD);
                        bus_dmamap_unload(sc->bge_cdata.bge_mtag_jumbo,
                            sc->bge_cdata.bge_rx_jumbo_dmamap[i]);
                        m_freem(sc->bge_cdata.bge_rx_jumbo_chain[i]);
                        sc->bge_cdata.bge_rx_jumbo_chain[i] = NULL;
                }
                bzero((char *)&sc->bge_ldata.bge_rx_jumbo_ring[i],
                    sizeof(struct bge_extrx_bd));
        }
}

static void
bge_free_tx_ring(struct bge_softc *sc)
{
        int i;

        if (sc->bge_ldata.bge_tx_ring == NULL)
                return;

        for (i = 0; i < BGE_TX_RING_CNT; i++) {
                if (sc->bge_cdata.bge_tx_chain[i] != NULL) {
                        bus_dmamap_sync(sc->bge_cdata.bge_tx_mtag,
                            sc->bge_cdata.bge_tx_dmamap[i],
                            BUS_DMASYNC_POSTWRITE);
                        bus_dmamap_unload(sc->bge_cdata.bge_tx_mtag,
                            sc->bge_cdata.bge_tx_dmamap[i]);
                        m_freem(sc->bge_cdata.bge_tx_chain[i]);
                        sc->bge_cdata.bge_tx_chain[i] = NULL;
                }
                bzero((char *)&sc->bge_ldata.bge_tx_ring[i],
                    sizeof(struct bge_tx_bd));
        }
}

static int
bge_init_tx_ring(struct bge_softc *sc)
{
        sc->bge_txcnt = 0;
        sc->bge_tx_saved_considx = 0;

        bzero(sc->bge_ldata.bge_tx_ring, BGE_TX_RING_SZ);
        bus_dmamap_sync(sc->bge_cdata.bge_tx_ring_tag,
            sc->bge_cdata.bge_tx_ring_map, BUS_DMASYNC_PREWRITE);

        /* Initialize transmit producer index for host-memory send ring. */
        sc->bge_tx_prodidx = 0;
        bge_writembx(sc, BGE_MBX_TX_HOST_PROD0_LO, sc->bge_tx_prodidx);

        /* 5700 b2 errata */
        if (sc->bge_chiprev == BGE_CHIPREV_5700_BX)
                bge_writembx(sc, BGE_MBX_TX_HOST_PROD0_LO, sc->bge_tx_prodidx);

        /* NIC-memory send ring not used; initialize to zero. */
        bge_writembx(sc, BGE_MBX_TX_NIC_PROD0_LO, 0);
        /* 5700 b2 errata */
        if (sc->bge_chiprev == BGE_CHIPREV_5700_BX)
                bge_writembx(sc, BGE_MBX_TX_NIC_PROD0_LO, 0);

        return (0);
}

static void
bge_setpromisc(struct bge_softc *sc)
{
        struct ifnet *ifp;

        BGE_LOCK_ASSERT(sc);

        ifp = sc->bge_ifp;

        /* Enable or disable promiscuous mode as needed. */
        if (ifp->if_flags & IFF_PROMISC)
                BGE_SETBIT(sc, BGE_RX_MODE, BGE_RXMODE_RX_PROMISC);
        else
                BGE_CLRBIT(sc, BGE_RX_MODE, BGE_RXMODE_RX_PROMISC);
}

static void
bge_setmulti(struct bge_softc *sc)
{
        struct ifnet *ifp;
        struct ifmultiaddr *ifma;
        uint32_t hashes[4] = { 0, 0, 0, 0 };
        int h, i;

        BGE_LOCK_ASSERT(sc);

        ifp = sc->bge_ifp;

        if (ifp->if_flags & IFF_ALLMULTI || ifp->if_flags & IFF_PROMISC) {
                for (i = 0; i < 4; i++)
                        CSR_WRITE_4(sc, BGE_MAR0 + (i * 4), 0xFFFFFFFF);
                return;
        }

        /* First, zot all the existing filters. */
        for (i = 0; i < 4; i++)
                CSR_WRITE_4(sc, BGE_MAR0 + (i * 4), 0);

        /* Now program new ones. */
        if_maddr_rlock(ifp);
        TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
                if (ifma->ifma_addr->sa_family != AF_LINK)
                        continue;
                h = ether_crc32_le(LLADDR((struct sockaddr_dl *)
                    ifma->ifma_addr), ETHER_ADDR_LEN) & 0x7F;
                hashes[(h & 0x60) >> 5] |= 1 << (h & 0x1F);
        }
        if_maddr_runlock(ifp);

        for (i = 0; i < 4; i++)
                CSR_WRITE_4(sc, BGE_MAR0 + (i * 4), hashes[i]);
}

static void
bge_setvlan(struct bge_softc *sc)
{
        struct ifnet *ifp;

        BGE_LOCK_ASSERT(sc);

        ifp = sc->bge_ifp;

        /* Enable or disable VLAN tag stripping as needed. */
        if (ifp->if_capenable & IFCAP_VLAN_HWTAGGING)
                BGE_CLRBIT(sc, BGE_RX_MODE, BGE_RXMODE_RX_KEEP_VLAN_DIAG);
        else
                BGE_SETBIT(sc, BGE_RX_MODE, BGE_RXMODE_RX_KEEP_VLAN_DIAG);
}

static void
bge_sig_pre_reset(struct bge_softc *sc, int type)
{

        /*
         * Some chips don't like this so only do this if ASF is enabled
         */
        if (sc->bge_asf_mode)
                bge_writemem_ind(sc, BGE_SRAM_FW_MB, BGE_SRAM_FW_MB_MAGIC);

        if (sc->bge_asf_mode & ASF_NEW_HANDSHAKE) {
                switch (type) {
                case BGE_RESET_START:
                        bge_writemem_ind(sc, BGE_SRAM_FW_DRV_STATE_MB,
                            BGE_FW_DRV_STATE_START);
                        break;
                case BGE_RESET_SHUTDOWN:
                        bge_writemem_ind(sc, BGE_SRAM_FW_DRV_STATE_MB,
                            BGE_FW_DRV_STATE_UNLOAD);
                        break;
                case BGE_RESET_SUSPEND:
                        bge_writemem_ind(sc, BGE_SRAM_FW_DRV_STATE_MB,
                            BGE_FW_DRV_STATE_SUSPEND);
                        break;
                }
        }

        if (type == BGE_RESET_START || type == BGE_RESET_SUSPEND)
                bge_ape_driver_state_change(sc, type);
}

static void
bge_sig_post_reset(struct bge_softc *sc, int type)
{

        if (sc->bge_asf_mode & ASF_NEW_HANDSHAKE) {
                switch (type) {
                case BGE_RESET_START:
                        bge_writemem_ind(sc, BGE_SRAM_FW_DRV_STATE_MB,
                            BGE_FW_DRV_STATE_START_DONE);
                        /* START DONE */
                        break;
                case BGE_RESET_SHUTDOWN:
                        bge_writemem_ind(sc, BGE_SRAM_FW_DRV_STATE_MB,
                            BGE_FW_DRV_STATE_UNLOAD_DONE);
                        break;
                }
        }
        if (type == BGE_RESET_SHUTDOWN)
                bge_ape_driver_state_change(sc, type);
}

static void
bge_sig_legacy(struct bge_softc *sc, int type)
{

        if (sc->bge_asf_mode) {
                switch (type) {
                case BGE_RESET_START:
                        bge_writemem_ind(sc, BGE_SRAM_FW_DRV_STATE_MB,
                            BGE_FW_DRV_STATE_START);
                        break;
                case BGE_RESET_SHUTDOWN:
                        bge_writemem_ind(sc, BGE_SRAM_FW_DRV_STATE_MB,
                            BGE_FW_DRV_STATE_UNLOAD);
                        break;
                }
        }
}

static void
bge_stop_fw(struct bge_softc *sc)
{
        int i;

        if (sc->bge_asf_mode) {
                bge_writemem_ind(sc, BGE_SRAM_FW_CMD_MB, BGE_FW_CMD_PAUSE);
                CSR_WRITE_4(sc, BGE_RX_CPU_EVENT,
                    CSR_READ_4(sc, BGE_RX_CPU_EVENT) | BGE_RX_CPU_DRV_EVENT);

                for (i = 0; i < 100; i++ ) {
                        if (!(CSR_READ_4(sc, BGE_RX_CPU_EVENT) &
                            BGE_RX_CPU_DRV_EVENT))
                                break;
                        DELAY(10);
                }
        }
}

static uint32_t
bge_dma_swap_options(struct bge_softc *sc)
{
        uint32_t dma_options;

        dma_options = BGE_MODECTL_WORDSWAP_NONFRAME |
            BGE_MODECTL_BYTESWAP_DATA | BGE_MODECTL_WORDSWAP_DATA;
#if BYTE_ORDER == BIG_ENDIAN
        dma_options |= BGE_MODECTL_BYTESWAP_NONFRAME;
#endif
        return (dma_options);
}

/*
 * Do endian, PCI and DMA initialization.
 */
static int
bge_chipinit(struct bge_softc *sc)
{
        uint32_t dma_rw_ctl, misc_ctl, mode_ctl;
        uint16_t val;
        int i;

        /* Set endianness before we access any non-PCI registers. */
        misc_ctl = BGE_INIT;
        if (sc->bge_flags & BGE_FLAG_TAGGED_STATUS)
                misc_ctl |= BGE_PCIMISCCTL_TAGGED_STATUS;
        pci_write_config(sc->bge_dev, BGE_PCI_MISC_CTL, misc_ctl, 4);

        /*
         * Clear the MAC statistics block in the NIC's
         * internal memory.
         */
        for (i = BGE_STATS_BLOCK;
            i < BGE_STATS_BLOCK_END + 1; i += sizeof(uint32_t))
                BGE_MEMWIN_WRITE(sc, i, 0);

        for (i = BGE_STATUS_BLOCK;
            i < BGE_STATUS_BLOCK_END + 1; i += sizeof(uint32_t))
                BGE_MEMWIN_WRITE(sc, i, 0);

        if (sc->bge_chiprev == BGE_CHIPREV_5704_BX) {
                /*
                 *  Fix data corruption caused by non-qword write with WB.
                 *  Fix master abort in PCI mode.
                 *  Fix PCI latency timer.
                 */
                val = pci_read_config(sc->bge_dev, BGE_PCI_MSI_DATA + 2, 2);
                val |= (1 << 10) | (1 << 12) | (1 << 13);
                pci_write_config(sc->bge_dev, BGE_PCI_MSI_DATA + 2, val, 2);
        }

        if (sc->bge_asicrev == BGE_ASICREV_BCM57765 ||
            sc->bge_asicrev == BGE_ASICREV_BCM57766) {
                /*
                 * For the 57766 and non Ax versions of 57765, bootcode
                 * needs to setup the PCIE Fast Training Sequence (FTS)
                 * value to prevent transmit hangs.
                 */
                if (sc->bge_chiprev != BGE_CHIPREV_57765_AX) {
                        CSR_WRITE_4(sc, BGE_CPMU_PADRNG_CTL,
                            CSR_READ_4(sc, BGE_CPMU_PADRNG_CTL) |
                            BGE_CPMU_PADRNG_CTL_RDIV2);
                }
        }

        /*
         * Set up the PCI DMA control register.
         */
        dma_rw_ctl = BGE_PCIDMARWCTL_RD_CMD_SHIFT(6) |
            BGE_PCIDMARWCTL_WR_CMD_SHIFT(7);
        if (sc->bge_flags & BGE_FLAG_PCIE) {
                if (sc->bge_mps >= 256)
                        dma_rw_ctl |= BGE_PCIDMARWCTL_WR_WAT_SHIFT(7);
                else
                        dma_rw_ctl |= BGE_PCIDMARWCTL_WR_WAT_SHIFT(3);
        } else if (sc->bge_flags & BGE_FLAG_PCIX) {
                if (BGE_IS_5714_FAMILY(sc)) {
                        /* 256 bytes for read and write. */
                        dma_rw_ctl |= BGE_PCIDMARWCTL_RD_WAT_SHIFT(2) |
                            BGE_PCIDMARWCTL_WR_WAT_SHIFT(2);
                        dma_rw_ctl |= (sc->bge_asicrev == BGE_ASICREV_BCM5780) ?
                            BGE_PCIDMARWCTL_ONEDMA_ATONCE_GLOBAL :
                            BGE_PCIDMARWCTL_ONEDMA_ATONCE_LOCAL;
                } else if (sc->bge_asicrev == BGE_ASICREV_BCM5703) {
                        /*
                         * In the BCM5703, the DMA read watermark should
                         * be set to less than or equal to the maximum
                         * memory read byte count of the PCI-X command
                         * register.
                         */
                        dma_rw_ctl |= BGE_PCIDMARWCTL_RD_WAT_SHIFT(4) |
                            BGE_PCIDMARWCTL_WR_WAT_SHIFT(3);
                } else if (sc->bge_asicrev == BGE_ASICREV_BCM5704) {
                        /* 1536 bytes for read, 384 bytes for write. */
                        dma_rw_ctl |= BGE_PCIDMARWCTL_RD_WAT_SHIFT(7) |
                            BGE_PCIDMARWCTL_WR_WAT_SHIFT(3);
                } else {
                        /* 384 bytes for read and write. */
                        dma_rw_ctl |= BGE_PCIDMARWCTL_RD_WAT_SHIFT(3) |
                            BGE_PCIDMARWCTL_WR_WAT_SHIFT(3) |
                            0x0F;
                }
                if (sc->bge_asicrev == BGE_ASICREV_BCM5703 ||
                    sc->bge_asicrev == BGE_ASICREV_BCM5704) {
                        uint32_t tmp;

                        /* Set ONE_DMA_AT_ONCE for hardware workaround. */
                        tmp = CSR_READ_4(sc, BGE_PCI_CLKCTL) & 0x1F;
                        if (tmp == 6 || tmp == 7)
                                dma_rw_ctl |=
                                    BGE_PCIDMARWCTL_ONEDMA_ATONCE_GLOBAL;

                        /* Set PCI-X DMA write workaround. */
                        dma_rw_ctl |= BGE_PCIDMARWCTL_ASRT_ALL_BE;
                }
        } else {
                /* Conventional PCI bus: 256 bytes for read and write. */
                dma_rw_ctl |= BGE_PCIDMARWCTL_RD_WAT_SHIFT(7) |
                    BGE_PCIDMARWCTL_WR_WAT_SHIFT(7);

                if (sc->bge_asicrev != BGE_ASICREV_BCM5705 &&
                    sc->bge_asicrev != BGE_ASICREV_BCM5750)
                        dma_rw_ctl |= 0x0F;
        }
        if (sc->bge_asicrev == BGE_ASICREV_BCM5700 ||
            sc->bge_asicrev == BGE_ASICREV_BCM5701)
                dma_rw_ctl |= BGE_PCIDMARWCTL_USE_MRM |
                    BGE_PCIDMARWCTL_ASRT_ALL_BE;
        if (sc->bge_asicrev == BGE_ASICREV_BCM5703 ||
            sc->bge_asicrev == BGE_ASICREV_BCM5704)
                dma_rw_ctl &= ~BGE_PCIDMARWCTL_MINDMA;
        if (BGE_IS_5717_PLUS(sc)) {
                dma_rw_ctl &= ~BGE_PCIDMARWCTL_DIS_CACHE_ALIGNMENT;
                if (sc->bge_chipid == BGE_CHIPID_BCM57765_A0)
                        dma_rw_ctl &= ~BGE_PCIDMARWCTL_CRDRDR_RDMA_MRRS_MSK;
                /*
                 * Enable HW workaround for controllers that misinterpret
                 * a status tag update and leave interrupts permanently
                 * disabled.
                 */
                if (!BGE_IS_57765_PLUS(sc) &&
                    sc->bge_asicrev != BGE_ASICREV_BCM5717 &&
                    sc->bge_asicrev != BGE_ASICREV_BCM5762)
                        dma_rw_ctl |= BGE_PCIDMARWCTL_TAGGED_STATUS_WA;
        }
        pci_write_config(sc->bge_dev, BGE_PCI_DMA_RW_CTL, dma_rw_ctl, 4);

        /*
         * Set up general mode register.
         */
        mode_ctl = bge_dma_swap_options(sc);
        if (sc->bge_asicrev == BGE_ASICREV_BCM5720 ||
            sc->bge_asicrev == BGE_ASICREV_BCM5762) {
                /* Retain Host-2-BMC settings written by APE firmware. */
                mode_ctl |= CSR_READ_4(sc, BGE_MODE_CTL) &
                    (BGE_MODECTL_BYTESWAP_B2HRX_DATA |
                    BGE_MODECTL_WORDSWAP_B2HRX_DATA |
                    BGE_MODECTL_B2HRX_ENABLE | BGE_MODECTL_HTX2B_ENABLE);
        }
        mode_ctl |= BGE_MODECTL_MAC_ATTN_INTR | BGE_MODECTL_HOST_SEND_BDS |
            BGE_MODECTL_TX_NO_PHDR_CSUM;

        /*
         * BCM5701 B5 have a bug causing data corruption when using
         * 64-bit DMA reads, which can be terminated early and then
         * completed later as 32-bit accesses, in combination with
         * certain bridges.
         */
        if (sc->bge_asicrev == BGE_ASICREV_BCM5701 &&
            sc->bge_chipid == BGE_CHIPID_BCM5701_B5)
                mode_ctl |= BGE_MODECTL_FORCE_PCI32;

        /*
         * Tell the firmware the driver is running
         */
        if (sc->bge_asf_mode & ASF_STACKUP)
                mode_ctl |= BGE_MODECTL_STACKUP;

        CSR_WRITE_4(sc, BGE_MODE_CTL, mode_ctl);

        /*
         * Disable memory write invalidate.  Apparently it is not supported
         * properly by these devices.
         */
        PCI_CLRBIT(sc->bge_dev, BGE_PCI_CMD, PCIM_CMD_MWIEN, 4);

        /* Set the timer prescaler (always 66 MHz). */
        CSR_WRITE_4(sc, BGE_MISC_CFG, BGE_32BITTIME_66MHZ);

        /* XXX: The Linux tg3 driver does this at the start of brgphy_reset. */
        if (sc->bge_asicrev == BGE_ASICREV_BCM5906) {
                DELAY(40);      /* XXX */

                /* Put PHY into ready state */
                BGE_CLRBIT(sc, BGE_MISC_CFG, BGE_MISCCFG_EPHY_IDDQ);
                CSR_READ_4(sc, BGE_MISC_CFG); /* Flush */
                DELAY(40);
        }

        return (0);
}

static int
bge_blockinit(struct bge_softc *sc)
{
        struct bge_rcb *rcb;
        bus_size_t vrcb;
        bge_hostaddr taddr;
        uint32_t dmactl, rdmareg, val;
        int i, limit;

        /*
         * Initialize the memory window pointer register so that
         * we can access the first 32K of internal NIC RAM. This will
         * allow us to set up the TX send ring RCBs and the RX return
         * ring RCBs, plus other things which live in NIC memory.
         */
        CSR_WRITE_4(sc, BGE_PCI_MEMWIN_BASEADDR, 0);

        /* Note: the BCM5704 has a smaller mbuf space than other chips. */

        if (!(BGE_IS_5705_PLUS(sc))) {
                /* Configure mbuf memory pool */
                CSR_WRITE_4(sc, BGE_BMAN_MBUFPOOL_BASEADDR, BGE_BUFFPOOL_1);
                if (sc->bge_asicrev == BGE_ASICREV_BCM5704)
                        CSR_WRITE_4(sc, BGE_BMAN_MBUFPOOL_LEN, 0x10000);
                else
                        CSR_WRITE_4(sc, BGE_BMAN_MBUFPOOL_LEN, 0x18000);

                /* Configure DMA resource pool */
                CSR_WRITE_4(sc, BGE_BMAN_DMA_DESCPOOL_BASEADDR,
                    BGE_DMA_DESCRIPTORS);
                CSR_WRITE_4(sc, BGE_BMAN_DMA_DESCPOOL_LEN, 0x2000);
        }

        /* Configure mbuf pool watermarks */
        if (BGE_IS_5717_PLUS(sc)) {
                CSR_WRITE_4(sc, BGE_BMAN_MBUFPOOL_READDMA_LOWAT, 0x0);
                if (sc->bge_ifp->if_mtu > ETHERMTU) {
                        CSR_WRITE_4(sc, BGE_BMAN_MBUFPOOL_MACRX_LOWAT, 0x7e);
                        CSR_WRITE_4(sc, BGE_BMAN_MBUFPOOL_HIWAT, 0xea);
                } else {
                        CSR_WRITE_4(sc, BGE_BMAN_MBUFPOOL_MACRX_LOWAT, 0x2a);
                        CSR_WRITE_4(sc, BGE_BMAN_MBUFPOOL_HIWAT, 0xa0);
                }
        } else if (!BGE_IS_5705_PLUS(sc)) {
                CSR_WRITE_4(sc, BGE_BMAN_MBUFPOOL_READDMA_LOWAT, 0x50);
                CSR_WRITE_4(sc, BGE_BMAN_MBUFPOOL_MACRX_LOWAT, 0x20);
                CSR_WRITE_4(sc, BGE_BMAN_MBUFPOOL_HIWAT, 0x60);
        } else if (sc->bge_asicrev == BGE_ASICREV_BCM5906) {
                CSR_WRITE_4(sc, BGE_BMAN_MBUFPOOL_READDMA_LOWAT, 0x0);
                CSR_WRITE_4(sc, BGE_BMAN_MBUFPOOL_MACRX_LOWAT, 0x04);
                CSR_WRITE_4(sc, BGE_BMAN_MBUFPOOL_HIWAT, 0x10);
        } else {
                CSR_WRITE_4(sc, BGE_BMAN_MBUFPOOL_READDMA_LOWAT, 0x0);
                CSR_WRITE_4(sc, BGE_BMAN_MBUFPOOL_MACRX_LOWAT, 0x10);
                CSR_WRITE_4(sc, BGE_BMAN_MBUFPOOL_HIWAT, 0x60);
        }

        /* Configure DMA resource watermarks */
        CSR_WRITE_4(sc, BGE_BMAN_DMA_DESCPOOL_LOWAT, 5);
        CSR_WRITE_4(sc, BGE_BMAN_DMA_DESCPOOL_HIWAT, 10);

        /* Enable buffer manager */
        val = BGE_BMANMODE_ENABLE | BGE_BMANMODE_LOMBUF_ATTN;
        /*
         * Change the arbitration algorithm of TXMBUF read request to
         * round-robin instead of priority based for BCM5719.  When
         * TXFIFO is almost empty, RDMA will hold its request until
         * TXFIFO is not almost empty.
         */
        if (sc->bge_asicrev == BGE_ASICREV_BCM5719)
                val |= BGE_BMANMODE_NO_TX_UNDERRUN;
        CSR_WRITE_4(sc, BGE_BMAN_MODE, val);

        /* Poll for buffer manager start indication */
        for (i = 0; i < BGE_TIMEOUT; i++) {
                DELAY(10);
                if (CSR_READ_4(sc, BGE_BMAN_MODE) & BGE_BMANMODE_ENABLE)
                        break;
        }

        if (i == BGE_TIMEOUT) {
                device_printf(sc->bge_dev, "buffer manager failed to start\n");
                return (ENXIO);
        }

        /* Enable flow-through queues */
        CSR_WRITE_4(sc, BGE_FTQ_RESET, 0xFFFFFFFF);
        CSR_WRITE_4(sc, BGE_FTQ_RESET, 0);

        /* Wait until queue initialization is complete */
        for (i = 0; i < BGE_TIMEOUT; i++) {
                DELAY(10);
                if (CSR_READ_4(sc, BGE_FTQ_RESET) == 0)
                        break;
        }

        if (i == BGE_TIMEOUT) {
                device_printf(sc->bge_dev, "flow-through queue init failed\n");
                return (ENXIO);
        }

        /*
         * Summary of rings supported by the controller:
         *
         * Standard Receive Producer Ring
         * - This ring is used to feed receive buffers for "standard"
         *   sized frames (typically 1536 bytes) to the controller.
         *
         * Jumbo Receive Producer Ring
         * - This ring is used to feed receive buffers for jumbo sized
         *   frames (i.e. anything bigger than the "standard" frames)
         *   to the controller.
         *
         * Mini Receive Producer Ring
         * - This ring is used to feed receive buffers for "mini"
         *   sized frames to the controller.
         * - This feature required external memory for the controller
         *   but was never used in a production system.  Should always
         *   be disabled.
         *
         * Receive Return Ring
         * - After the controller has placed an incoming frame into a
         *   receive buffer that buffer is moved into a receive return
         *   ring.  The driver is then responsible to passing the
         *   buffer up to the stack.  Many versions of the controller
         *   support multiple RR rings.
         *
         * Send Ring
         * - This ring is used for outgoing frames.  Many versions of
         *   the controller support multiple send rings.
         */

        /* Initialize the standard receive producer ring control block. */
        rcb = &sc->bge_ldata.bge_info.bge_std_rx_rcb;
        rcb->bge_hostaddr.bge_addr_lo =
            BGE_ADDR_LO(sc->bge_ldata.bge_rx_std_ring_paddr);
        rcb->bge_hostaddr.bge_addr_hi =
            BGE_ADDR_HI(sc->bge_ldata.bge_rx_std_ring_paddr);
        bus_dmamap_sync(sc->bge_cdata.bge_rx_std_ring_tag,
            sc->bge_cdata.bge_rx_std_ring_map, BUS_DMASYNC_PREREAD);
        if (BGE_IS_5717_PLUS(sc)) {
                /*
                 * Bits 31-16: Programmable ring size (2048, 1024, 512, .., 32)
                 * Bits 15-2 : Maximum RX frame size
                 * Bit 1     : 1 = Ring Disabled, 0 = Ring ENabled
                 * Bit 0     : Reserved
                 */
                rcb->bge_maxlen_flags =
                    BGE_RCB_MAXLEN_FLAGS(512, BGE_MAX_FRAMELEN << 2);
        } else if (BGE_IS_5705_PLUS(sc)) {
                /*
                 * Bits 31-16: Programmable ring size (512, 256, 128, 64, 32)
                 * Bits 15-2 : Reserved (should be 0)
                 * Bit 1     : 1 = Ring Disabled, 0 = Ring Enabled
                 * Bit 0     : Reserved
                 */
                rcb->bge_maxlen_flags = BGE_RCB_MAXLEN_FLAGS(512, 0);
        } else {
                /*
                 * Ring size is always XXX entries
                 * Bits 31-16: Maximum RX frame size
                 * Bits 15-2 : Reserved (should be 0)
                 * Bit 1     : 1 = Ring Disabled, 0 = Ring Enabled
                 * Bit 0     : Reserved
                 */
                rcb->bge_maxlen_flags =
                    BGE_RCB_MAXLEN_FLAGS(BGE_MAX_FRAMELEN, 0);
        }
        if (sc->bge_asicrev == BGE_ASICREV_BCM5717 ||
            sc->bge_asicrev == BGE_ASICREV_BCM5719 ||
            sc->bge_asicrev == BGE_ASICREV_BCM5720)
                rcb->bge_nicaddr = BGE_STD_RX_RINGS_5717;
        else
                rcb->bge_nicaddr = BGE_STD_RX_RINGS;
        /* Write the standard receive producer ring control block. */
        CSR_WRITE_4(sc, BGE_RX_STD_RCB_HADDR_HI, rcb->bge_hostaddr.bge_addr_hi);
        CSR_WRITE_4(sc, BGE_RX_STD_RCB_HADDR_LO, rcb->bge_hostaddr.bge_addr_lo);
        CSR_WRITE_4(sc, BGE_RX_STD_RCB_MAXLEN_FLAGS, rcb->bge_maxlen_flags);
        CSR_WRITE_4(sc, BGE_RX_STD_RCB_NICADDR, rcb->bge_nicaddr);

        /* Reset the standard receive producer ring producer index. */
        bge_writembx(sc, BGE_MBX_RX_STD_PROD_LO, 0);

        /*
         * Initialize the jumbo RX producer ring control
         * block.  We set the 'ring disabled' bit in the
         * flags field until we're actually ready to start
         * using this ring (i.e. once we set the MTU
         * high enough to require it).
         */
        if (BGE_IS_JUMBO_CAPABLE(sc)) {
                rcb = &sc->bge_ldata.bge_info.bge_jumbo_rx_rcb;
                /* Get the jumbo receive producer ring RCB parameters. */
                rcb->bge_hostaddr.bge_addr_lo =
                    BGE_ADDR_LO(sc->bge_ldata.bge_rx_jumbo_ring_paddr);
                rcb->bge_hostaddr.bge_addr_hi =
                    BGE_ADDR_HI(sc->bge_ldata.bge_rx_jumbo_ring_paddr);
                bus_dmamap_sync(sc->bge_cdata.bge_rx_jumbo_ring_tag,
                    sc->bge_cdata.bge_rx_jumbo_ring_map,
                    BUS_DMASYNC_PREREAD);
                rcb->bge_maxlen_flags = BGE_RCB_MAXLEN_FLAGS(0,
                    BGE_RCB_FLAG_USE_EXT_RX_BD | BGE_RCB_FLAG_RING_DISABLED);
                if (sc->bge_asicrev == BGE_ASICREV_BCM5717 ||
                    sc->bge_asicrev == BGE_ASICREV_BCM5719 ||
                    sc->bge_asicrev == BGE_ASICREV_BCM5720)
                        rcb->bge_nicaddr = BGE_JUMBO_RX_RINGS_5717;
                else
                        rcb->bge_nicaddr = BGE_JUMBO_RX_RINGS;
                CSR_WRITE_4(sc, BGE_RX_JUMBO_RCB_HADDR_HI,
                    rcb->bge_hostaddr.bge_addr_hi);
                CSR_WRITE_4(sc, BGE_RX_JUMBO_RCB_HADDR_LO,
                    rcb->bge_hostaddr.bge_addr_lo);
                /* Program the jumbo receive producer ring RCB parameters. */
                CSR_WRITE_4(sc, BGE_RX_JUMBO_RCB_MAXLEN_FLAGS,
                    rcb->bge_maxlen_flags);
                CSR_WRITE_4(sc, BGE_RX_JUMBO_RCB_NICADDR, rcb->bge_nicaddr);
                /* Reset the jumbo receive producer ring producer index. */
                bge_writembx(sc, BGE_MBX_RX_JUMBO_PROD_LO, 0);
        }

        /* Disable the mini receive producer ring RCB. */
        if (BGE_IS_5700_FAMILY(sc)) {
                rcb = &sc->bge_ldata.bge_info.bge_mini_rx_rcb;
                rcb->bge_maxlen_flags =
                    BGE_RCB_MAXLEN_FLAGS(0, BGE_RCB_FLAG_RING_DISABLED);
                CSR_WRITE_4(sc, BGE_RX_MINI_RCB_MAXLEN_FLAGS,
                    rcb->bge_maxlen_flags);
                /* Reset the mini receive producer ring producer index. */
                bge_writembx(sc, BGE_MBX_RX_MINI_PROD_LO, 0);
        }

        /* Choose de-pipeline mode for BCM5906 A0, A1 and A2. */
        if (sc->bge_asicrev == BGE_ASICREV_BCM5906) {
                if (sc->bge_chipid == BGE_CHIPID_BCM5906_A0 ||
                    sc->bge_chipid == BGE_CHIPID_BCM5906_A1 ||
                    sc->bge_chipid == BGE_CHIPID_BCM5906_A2)
                        CSR_WRITE_4(sc, BGE_ISO_PKT_TX,
                            (CSR_READ_4(sc, BGE_ISO_PKT_TX) & ~3) | 2);
        }
        /*
         * The BD ring replenish thresholds control how often the
         * hardware fetches new BD's from the producer rings in host
         * memory.  Setting the value too low on a busy system can
         * starve the hardware and recue the throughpout.
         *
         * Set the BD ring replentish thresholds. The recommended
         * values are 1/8th the number of descriptors allocated to
         * each ring.
         * XXX The 5754 requires a lower threshold, so it might be a
         * requirement of all 575x family chips.  The Linux driver sets
         * the lower threshold for all 5705 family chips as well, but there
         * are reports that it might not need to be so strict.
         *
         * XXX Linux does some extra fiddling here for the 5906 parts as
         * well.
         */
        if (BGE_IS_5705_PLUS(sc))
                val = 8;
        else
                val = BGE_STD_RX_RING_CNT / 8;
        CSR_WRITE_4(sc, BGE_RBDI_STD_REPL_THRESH, val);
        if (BGE_IS_JUMBO_CAPABLE(sc))
                CSR_WRITE_4(sc, BGE_RBDI_JUMBO_REPL_THRESH,
                    BGE_JUMBO_RX_RING_CNT/8);
        if (BGE_IS_5717_PLUS(sc)) {
                CSR_WRITE_4(sc, BGE_STD_REPLENISH_LWM, 32);
                CSR_WRITE_4(sc, BGE_JMB_REPLENISH_LWM, 16);
        }

        /*
         * Disable all send rings by setting the 'ring disabled' bit
         * in the flags field of all the TX send ring control blocks,
         * located in NIC memory.
         */
        if (!BGE_IS_5705_PLUS(sc))
                /* 5700 to 5704 had 16 send rings. */
                limit = BGE_TX_RINGS_EXTSSRAM_MAX;
        else if (BGE_IS_57765_PLUS(sc) ||
            sc->bge_asicrev == BGE_ASICREV_BCM5762)
                limit = 2;
        else if (BGE_IS_5717_PLUS(sc))
                limit = 4;
        else
                limit = 1;
        vrcb = BGE_MEMWIN_START + BGE_SEND_RING_RCB;
        for (i = 0; i < limit; i++) {
                RCB_WRITE_4(sc, vrcb, bge_maxlen_flags,
                    BGE_RCB_MAXLEN_FLAGS(0, BGE_RCB_FLAG_RING_DISABLED));
                RCB_WRITE_4(sc, vrcb, bge_nicaddr, 0);
                vrcb += sizeof(struct bge_rcb);
        }

        /* Configure send ring RCB 0 (we use only the first ring) */
        vrcb = BGE_MEMWIN_START + BGE_SEND_RING_RCB;
        BGE_HOSTADDR(taddr, sc->bge_ldata.bge_tx_ring_paddr);
        RCB_WRITE_4(sc, vrcb, bge_hostaddr.bge_addr_hi, taddr.bge_addr_hi);
        RCB_WRITE_4(sc, vrcb, bge_hostaddr.bge_addr_lo, taddr.bge_addr_lo);
        if (sc->bge_asicrev == BGE_ASICREV_BCM5717 ||
            sc->bge_asicrev == BGE_ASICREV_BCM5719 ||
            sc->bge_asicrev == BGE_ASICREV_BCM5720)
                RCB_WRITE_4(sc, vrcb, bge_nicaddr, BGE_SEND_RING_5717);
        else
                RCB_WRITE_4(sc, vrcb, bge_nicaddr,
                    BGE_NIC_TXRING_ADDR(0, BGE_TX_RING_CNT));
        RCB_WRITE_4(sc, vrcb, bge_maxlen_flags,
            BGE_RCB_MAXLEN_FLAGS(BGE_TX_RING_CNT, 0));

        /*
         * Disable all receive return rings by setting the
         * 'ring diabled' bit in the flags field of all the receive
         * return ring control blocks, located in NIC memory.
         */
        if (sc->bge_asicrev == BGE_ASICREV_BCM5717 ||
            sc->bge_asicrev == BGE_ASICREV_BCM5719 ||
            sc->bge_asicrev == BGE_ASICREV_BCM5720) {
                /* Should be 17, use 16 until we get an SRAM map. */
                limit = 16;
        } else if (!BGE_IS_5705_PLUS(sc))
                limit = BGE_RX_RINGS_MAX;
        else if (sc->bge_asicrev == BGE_ASICREV_BCM5755 ||
            sc->bge_asicrev == BGE_ASICREV_BCM5762 ||
            BGE_IS_57765_PLUS(sc))
                limit = 4;
        else
                limit = 1;
        /* Disable all receive return rings. */
        vrcb = BGE_MEMWIN_START + BGE_RX_RETURN_RING_RCB;
        for (i = 0; i < limit; i++) {
                RCB_WRITE_4(sc, vrcb, bge_hostaddr.bge_addr_hi, 0);
                RCB_WRITE_4(sc, vrcb, bge_hostaddr.bge_addr_lo, 0);
                RCB_WRITE_4(sc, vrcb, bge_maxlen_flags,
                    BGE_RCB_FLAG_RING_DISABLED);
                RCB_WRITE_4(sc, vrcb, bge_nicaddr, 0);
                bge_writembx(sc, BGE_MBX_RX_CONS0_LO +
                    (i * (sizeof(uint64_t))), 0);
                vrcb += sizeof(struct bge_rcb);
        }

        /*
         * Set up receive return ring 0.  Note that the NIC address
         * for RX return rings is 0x0.  The return rings live entirely
         * within the host, so the nicaddr field in the RCB isn't used.
         */
        vrcb = BGE_MEMWIN_START + BGE_RX_RETURN_RING_RCB;
        BGE_HOSTADDR(taddr, sc->bge_ldata.bge_rx_return_ring_paddr);
        RCB_WRITE_4(sc, vrcb, bge_hostaddr.bge_addr_hi, taddr.bge_addr_hi);
        RCB_WRITE_4(sc, vrcb, bge_hostaddr.bge_addr_lo, taddr.bge_addr_lo);
        RCB_WRITE_4(sc, vrcb, bge_nicaddr, 0);
        RCB_WRITE_4(sc, vrcb, bge_maxlen_flags,
            BGE_RCB_MAXLEN_FLAGS(sc->bge_return_ring_cnt, 0));

        /* Set random backoff seed for TX */
        CSR_WRITE_4(sc, BGE_TX_RANDOM_BACKOFF,
            (IF_LLADDR(sc->bge_ifp)[0] + IF_LLADDR(sc->bge_ifp)[1] +
            IF_LLADDR(sc->bge_ifp)[2] + IF_LLADDR(sc->bge_ifp)[3] +
            IF_LLADDR(sc->bge_ifp)[4] + IF_LLADDR(sc->bge_ifp)[5]) &
            BGE_TX_BACKOFF_SEED_MASK);

        /* Set inter-packet gap */
        val = 0x2620;
        if (sc->bge_asicrev == BGE_ASICREV_BCM5720 ||
            sc->bge_asicrev == BGE_ASICREV_BCM5762)
                val |= CSR_READ_4(sc, BGE_TX_LENGTHS) &
                    (BGE_TXLEN_JMB_FRM_LEN_MSK | BGE_TXLEN_CNT_DN_VAL_MSK);
        CSR_WRITE_4(sc, BGE_TX_LENGTHS, val);

        /*
         * Specify which ring to use for packets that don't match
         * any RX rules.
         */
        CSR_WRITE_4(sc, BGE_RX_RULES_CFG, 0x08);

        /*
         * Configure number of RX lists. One interrupt distribution
         * list, sixteen active lists, one bad frames class.
         */
        CSR_WRITE_4(sc, BGE_RXLP_CFG, 0x181);

        /* Inialize RX list placement stats mask. */
        CSR_WRITE_4(sc, BGE_RXLP_STATS_ENABLE_MASK, 0x007FFFFF);
        CSR_WRITE_4(sc, BGE_RXLP_STATS_CTL, 0x1);

        /* Disable host coalescing until we get it set up */
        CSR_WRITE_4(sc, BGE_HCC_MODE, 0x00000000);

        /* Poll to make sure it's shut down. */
        for (i = 0; i < BGE_TIMEOUT; i++) {
                DELAY(10);
                if (!(CSR_READ_4(sc, BGE_HCC_MODE) & BGE_HCCMODE_ENABLE))
                        break;
        }

        if (i == BGE_TIMEOUT) {
                device_printf(sc->bge_dev,
                    "host coalescing engine failed to idle\n");
                return (ENXIO);
        }

        /* Set up host coalescing defaults */
        CSR_WRITE_4(sc, BGE_HCC_RX_COAL_TICKS, sc->bge_rx_coal_ticks);
        CSR_WRITE_4(sc, BGE_HCC_TX_COAL_TICKS, sc->bge_tx_coal_ticks);
        CSR_WRITE_4(sc, BGE_HCC_RX_MAX_COAL_BDS, sc->bge_rx_max_coal_bds);
        CSR_WRITE_4(sc, BGE_HCC_TX_MAX_COAL_BDS, sc->bge_tx_max_coal_bds);
        if (!(BGE_IS_5705_PLUS(sc))) {
                CSR_WRITE_4(sc, BGE_HCC_RX_COAL_TICKS_INT, 0);
                CSR_WRITE_4(sc, BGE_HCC_TX_COAL_TICKS_INT, 0);
        }
        CSR_WRITE_4(sc, BGE_HCC_RX_MAX_COAL_BDS_INT, 1);
        CSR_WRITE_4(sc, BGE_HCC_TX_MAX_COAL_BDS_INT, 1);

        /* Set up address of statistics block */
        if (!(BGE_IS_5705_PLUS(sc))) {
                CSR_WRITE_4(sc, BGE_HCC_STATS_ADDR_HI,
                    BGE_ADDR_HI(sc->bge_ldata.bge_stats_paddr));
                CSR_WRITE_4(sc, BGE_HCC_STATS_ADDR_LO,
                    BGE_ADDR_LO(sc->bge_ldata.bge_stats_paddr));
                CSR_WRITE_4(sc, BGE_HCC_STATS_BASEADDR, BGE_STATS_BLOCK);
                CSR_WRITE_4(sc, BGE_HCC_STATUSBLK_BASEADDR, BGE_STATUS_BLOCK);
                CSR_WRITE_4(sc, BGE_HCC_STATS_TICKS, sc->bge_stat_ticks);
        }

        /* Set up address of status block */
        CSR_WRITE_4(sc, BGE_HCC_STATUSBLK_ADDR_HI,
            BGE_ADDR_HI(sc->bge_ldata.bge_status_block_paddr));
        CSR_WRITE_4(sc, BGE_HCC_STATUSBLK_ADDR_LO,
            BGE_ADDR_LO(sc->bge_ldata.bge_status_block_paddr));

        /* Set up status block size. */
        if (sc->bge_asicrev == BGE_ASICREV_BCM5700 &&
            sc->bge_chipid != BGE_CHIPID_BCM5700_C0) {
                val = BGE_STATBLKSZ_FULL;
                bzero(sc->bge_ldata.bge_status_block, BGE_STATUS_BLK_SZ);
        } else {
                val = BGE_STATBLKSZ_32BYTE;
                bzero(sc->bge_ldata.bge_status_block, 32);
        }
        bus_dmamap_sync(sc->bge_cdata.bge_status_tag,
            sc->bge_cdata.bge_status_map,
            BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);

        /* Turn on host coalescing state machine */
        CSR_WRITE_4(sc, BGE_HCC_MODE, val | BGE_HCCMODE_ENABLE);

        /* Turn on RX BD completion state machine and enable attentions */
        CSR_WRITE_4(sc, BGE_RBDC_MODE,
            BGE_RBDCMODE_ENABLE | BGE_RBDCMODE_ATTN);

        /* Turn on RX list placement state machine */
        CSR_WRITE_4(sc, BGE_RXLP_MODE, BGE_RXLPMODE_ENABLE);

        /* Turn on RX list selector state machine. */
        if (!(BGE_IS_5705_PLUS(sc)))
                CSR_WRITE_4(sc, BGE_RXLS_MODE, BGE_RXLSMODE_ENABLE);

        /* Turn on DMA, clear stats. */
        val = BGE_MACMODE_TXDMA_ENB | BGE_MACMODE_RXDMA_ENB |
            BGE_MACMODE_RX_STATS_CLEAR | BGE_MACMODE_TX_STATS_CLEAR |
            BGE_MACMODE_RX_STATS_ENB | BGE_MACMODE_TX_STATS_ENB |
            BGE_MACMODE_FRMHDR_DMA_ENB;

        if (sc->bge_flags & BGE_FLAG_TBI)
                val |= BGE_PORTMODE_TBI;
        else if (sc->bge_flags & BGE_FLAG_MII_SERDES)
                val |= BGE_PORTMODE_GMII;
        else
                val |= BGE_PORTMODE_MII;

        /* Allow APE to send/receive frames. */
        if ((sc->bge_mfw_flags & BGE_MFW_ON_APE) != 0)
                val |= BGE_MACMODE_APE_RX_EN | BGE_MACMODE_APE_TX_EN;

        CSR_WRITE_4(sc, BGE_MAC_MODE, val);
        DELAY(40);

        /* Set misc. local control, enable interrupts on attentions */
        BGE_SETBIT(sc, BGE_MISC_LOCAL_CTL, BGE_MLC_INTR_ONATTN);

#ifdef notdef
        /* Assert GPIO pins for PHY reset */
        BGE_SETBIT(sc, BGE_MISC_LOCAL_CTL, BGE_MLC_MISCIO_OUT0 |
            BGE_MLC_MISCIO_OUT1 | BGE_MLC_MISCIO_OUT2);
        BGE_SETBIT(sc, BGE_MISC_LOCAL_CTL, BGE_MLC_MISCIO_OUTEN0 |
            BGE_MLC_MISCIO_OUTEN1 | BGE_MLC_MISCIO_OUTEN2);
#endif

        /* Turn on DMA completion state machine */
        if (!(BGE_IS_5705_PLUS(sc)))
                CSR_WRITE_4(sc, BGE_DMAC_MODE, BGE_DMACMODE_ENABLE);

        val = BGE_WDMAMODE_ENABLE | BGE_WDMAMODE_ALL_ATTNS;

        /* Enable host coalescing bug fix. */
        if (BGE_IS_5755_PLUS(sc))
                val |= BGE_WDMAMODE_STATUS_TAG_FIX;

        /* Request larger DMA burst size to get better performance. */
        if (sc->bge_asicrev == BGE_ASICREV_BCM5785)
                val |= BGE_WDMAMODE_BURST_ALL_DATA;

        /* Turn on write DMA state machine */
        CSR_WRITE_4(sc, BGE_WDMA_MODE, val);
        DELAY(40);

        /* Turn on read DMA state machine */
        val = BGE_RDMAMODE_ENABLE | BGE_RDMAMODE_ALL_ATTNS;

        if (sc->bge_asicrev == BGE_ASICREV_BCM5717)
                val |= BGE_RDMAMODE_MULT_DMA_RD_DIS;

        if (sc->bge_asicrev == BGE_ASICREV_BCM5784 ||
            sc->bge_asicrev == BGE_ASICREV_BCM5785 ||
            sc->bge_asicrev == BGE_ASICREV_BCM57780)
                val |= BGE_RDMAMODE_BD_SBD_CRPT_ATTN |
                    BGE_RDMAMODE_MBUF_RBD_CRPT_ATTN |
                    BGE_RDMAMODE_MBUF_SBD_CRPT_ATTN;
        if (sc->bge_flags & BGE_FLAG_PCIE)
                val |= BGE_RDMAMODE_FIFO_LONG_BURST;
        if (sc->bge_flags & (BGE_FLAG_TSO | BGE_FLAG_TSO3)) {
                val |= BGE_RDMAMODE_TSO4_ENABLE;
                if (sc->bge_flags & BGE_FLAG_TSO3 ||
                    sc->bge_asicrev == BGE_ASICREV_BCM5785 ||
                    sc->bge_asicrev == BGE_ASICREV_BCM57780)
                        val |= BGE_RDMAMODE_TSO6_ENABLE;
        }

        if (sc->bge_asicrev == BGE_ASICREV_BCM5720 ||
            sc->bge_asicrev == BGE_ASICREV_BCM5762) {
                val |= CSR_READ_4(sc, BGE_RDMA_MODE) &
                        BGE_RDMAMODE_H2BNC_VLAN_DET;
                /*
                 * Allow multiple outstanding read requests from
                 * non-LSO read DMA engine.
                 */
                val &= ~BGE_RDMAMODE_MULT_DMA_RD_DIS;
        }

        if (sc->bge_asicrev == BGE_ASICREV_BCM5761 ||
            sc->bge_asicrev == BGE_ASICREV_BCM5784 ||
            sc->bge_asicrev == BGE_ASICREV_BCM5785 ||
            sc->bge_asicrev == BGE_ASICREV_BCM57780 ||
            BGE_IS_5717_PLUS(sc) || BGE_IS_57765_PLUS(sc)) {
                if (sc->bge_asicrev == BGE_ASICREV_BCM5762)
                        rdmareg = BGE_RDMA_RSRVCTRL_REG2;
                else
                        rdmareg = BGE_RDMA_RSRVCTRL;
                dmactl = CSR_READ_4(sc, rdmareg);
                /*
                 * Adjust tx margin to prevent TX data corruption and
                 * fix internal FIFO overflow.
                 */
                if (sc->bge_chipid == BGE_CHIPID_BCM5719_A0 ||
                    sc->bge_asicrev == BGE_ASICREV_BCM5762) {
                        dmactl &= ~(BGE_RDMA_RSRVCTRL_FIFO_LWM_MASK |
                            BGE_RDMA_RSRVCTRL_FIFO_HWM_MASK |
                            BGE_RDMA_RSRVCTRL_TXMRGN_MASK);
                        dmactl |= BGE_RDMA_RSRVCTRL_FIFO_LWM_1_5K |
                            BGE_RDMA_RSRVCTRL_FIFO_HWM_1_5K |
                            BGE_RDMA_RSRVCTRL_TXMRGN_320B;
                }
                /*
                 * Enable fix for read DMA FIFO overruns.
                 * The fix is to limit the number of RX BDs
                 * the hardware would fetch at a fime.
                 */
                CSR_WRITE_4(sc, rdmareg, dmactl |
                    BGE_RDMA_RSRVCTRL_FIFO_OFLW_FIX);
        }

        if (sc->bge_asicrev == BGE_ASICREV_BCM5719) {
                CSR_WRITE_4(sc, BGE_RDMA_LSO_CRPTEN_CTRL,
                    CSR_READ_4(sc, BGE_RDMA_LSO_CRPTEN_CTRL) |
                    BGE_RDMA_LSO_CRPTEN_CTRL_BLEN_BD_4K |
                    BGE_RDMA_LSO_CRPTEN_CTRL_BLEN_LSO_4K);
        } else if (sc->bge_asicrev == BGE_ASICREV_BCM5720) {
                /*
                 * Allow 4KB burst length reads for non-LSO frames.
                 * Enable 512B burst length reads for buffer descriptors.
                 */
                CSR_WRITE_4(sc, BGE_RDMA_LSO_CRPTEN_CTRL,
                    CSR_READ_4(sc, BGE_RDMA_LSO_CRPTEN_CTRL) |
                    BGE_RDMA_LSO_CRPTEN_CTRL_BLEN_BD_512 |
                    BGE_RDMA_LSO_CRPTEN_CTRL_BLEN_LSO_4K);
        } else if (sc->bge_asicrev == BGE_ASICREV_BCM5762) {
                CSR_WRITE_4(sc, BGE_RDMA_LSO_CRPTEN_CTRL_REG2,
                    CSR_READ_4(sc, BGE_RDMA_LSO_CRPTEN_CTRL_REG2) |
                    BGE_RDMA_LSO_CRPTEN_CTRL_BLEN_BD_4K |
                    BGE_RDMA_LSO_CRPTEN_CTRL_BLEN_LSO_4K);
        }

        CSR_WRITE_4(sc, BGE_RDMA_MODE, val);
        DELAY(40);

        if (sc->bge_flags & BGE_FLAG_RDMA_BUG) {
                for (i = 0; i < BGE_NUM_RDMA_CHANNELS / 2; i++) {
                        val = CSR_READ_4(sc, BGE_RDMA_LENGTH + i * 4);
                        if ((val & 0xFFFF) > BGE_FRAMELEN)
                                break;
                        if (((val >> 16) & 0xFFFF) > BGE_FRAMELEN)
                                break;
                }
                if (i != BGE_NUM_RDMA_CHANNELS / 2) {
                        val = CSR_READ_4(sc, BGE_RDMA_LSO_CRPTEN_CTRL);
                        if (sc->bge_asicrev == BGE_ASICREV_BCM5719)
                                val |= BGE_RDMA_TX_LENGTH_WA_5719;
                        else
                                val |= BGE_RDMA_TX_LENGTH_WA_5720;
                        CSR_WRITE_4(sc, BGE_RDMA_LSO_CRPTEN_CTRL, val);
                }
        }

        /* Turn on RX data completion state machine */
        CSR_WRITE_4(sc, BGE_RDC_MODE, BGE_RDCMODE_ENABLE);

        /* Turn on RX BD initiator state machine */
        CSR_WRITE_4(sc, BGE_RBDI_MODE, BGE_RBDIMODE_ENABLE);

        /* Turn on RX data and RX BD initiator state machine */
        CSR_WRITE_4(sc, BGE_RDBDI_MODE, BGE_RDBDIMODE_ENABLE);

        /* Turn on Mbuf cluster free state machine */
        if (!(BGE_IS_5705_PLUS(sc)))
                CSR_WRITE_4(sc, BGE_MBCF_MODE, BGE_MBCFMODE_ENABLE);

        /* Turn on send BD completion state machine */
        CSR_WRITE_4(sc, BGE_SBDC_MODE, BGE_SBDCMODE_ENABLE);

        /* Turn on send data completion state machine */
        val = BGE_SDCMODE_ENABLE;
        if (sc->bge_asicrev == BGE_ASICREV_BCM5761)
                val |= BGE_SDCMODE_CDELAY;
        CSR_WRITE_4(sc, BGE_SDC_MODE, val);

        /* Turn on send data initiator state machine */
        if (sc->bge_flags & (BGE_FLAG_TSO | BGE_FLAG_TSO3))
                CSR_WRITE_4(sc, BGE_SDI_MODE, BGE_SDIMODE_ENABLE |
                    BGE_SDIMODE_HW_LSO_PRE_DMA);
        else
                CSR_WRITE_4(sc, BGE_SDI_MODE, BGE_SDIMODE_ENABLE);

        /* Turn on send BD initiator state machine */
        CSR_WRITE_4(sc, BGE_SBDI_MODE, BGE_SBDIMODE_ENABLE);

        /* Turn on send BD selector state machine */
        CSR_WRITE_4(sc, BGE_SRS_MODE, BGE_SRSMODE_ENABLE);

        CSR_WRITE_4(sc, BGE_SDI_STATS_ENABLE_MASK, 0x007FFFFF);
        CSR_WRITE_4(sc, BGE_SDI_STATS_CTL,
            BGE_SDISTATSCTL_ENABLE | BGE_SDISTATSCTL_FASTER);

        /* ack/clear link change events */
        CSR_WRITE_4(sc, BGE_MAC_STS, BGE_MACSTAT_SYNC_CHANGED |
            BGE_MACSTAT_CFG_CHANGED | BGE_MACSTAT_MI_COMPLETE |
            BGE_MACSTAT_LINK_CHANGED);
        CSR_WRITE_4(sc, BGE_MI_STS, 0);

        /*
         * Enable attention when the link has changed state for
         * devices that use auto polling.
         */
        if (sc->bge_flags & BGE_FLAG_TBI) {
                CSR_WRITE_4(sc, BGE_MI_STS, BGE_MISTS_LINK);
        } else {
                if (sc->bge_mi_mode & BGE_MIMODE_AUTOPOLL) {
                        CSR_WRITE_4(sc, BGE_MI_MODE, sc->bge_mi_mode);
                        DELAY(80);
                }
                if (sc->bge_asicrev == BGE_ASICREV_BCM5700 &&
                    sc->bge_chipid != BGE_CHIPID_BCM5700_B2)
                        CSR_WRITE_4(sc, BGE_MAC_EVT_ENB,
                            BGE_EVTENB_MI_INTERRUPT);
        }

        /*
         * Clear any pending link state attention.
         * Otherwise some link state change events may be lost until attention
         * is cleared by bge_intr() -> bge_link_upd() sequence.
         * It's not necessary on newer BCM chips - perhaps enabling link
         * state change attentions implies clearing pending attention.
         */
        CSR_WRITE_4(sc, BGE_MAC_STS, BGE_MACSTAT_SYNC_CHANGED |
            BGE_MACSTAT_CFG_CHANGED | BGE_MACSTAT_MI_COMPLETE |
            BGE_MACSTAT_LINK_CHANGED);

        /* Enable link state change attentions. */
        BGE_SETBIT(sc, BGE_MAC_EVT_ENB, BGE_EVTENB_LINK_CHANGED);

        return (0);
}

static const struct bge_revision *
bge_lookup_rev(uint32_t chipid)
{
        const struct bge_revision *br;

        for (br = bge_revisions; br->br_name != NULL; br++) {
                if (br->br_chipid == chipid)
                        return (br);
        }

        for (br = bge_majorrevs; br->br_name != NULL; br++) {
                if (br->br_chipid == BGE_ASICREV(chipid))
                        return (br);
        }

        return (NULL);
}

static const struct bge_vendor *
bge_lookup_vendor(uint16_t vid)
{
        const struct bge_vendor *v;

        for (v = bge_vendors; v->v_name != NULL; v++)
                if (v->v_id == vid)
                        return (v);

        return (NULL);
}

static uint32_t
bge_chipid(device_t dev)
{
        uint32_t id;

        id = pci_read_config(dev, BGE_PCI_MISC_CTL, 4) >>
            BGE_PCIMISCCTL_ASICREV_SHIFT;
        if (BGE_ASICREV(id) == BGE_ASICREV_USE_PRODID_REG) {
                /*
                 * Find the ASCI revision.  Different chips use different
                 * registers.
                 */
                switch (pci_get_device(dev)) {
                case BCOM_DEVICEID_BCM5717:
                case BCOM_DEVICEID_BCM5718:
                case BCOM_DEVICEID_BCM5719:
                case BCOM_DEVICEID_BCM5720:
                case BCOM_DEVICEID_BCM5725:
                case BCOM_DEVICEID_BCM5727:
                case BCOM_DEVICEID_BCM5762:
                case BCOM_DEVICEID_BCM57764:
                case BCOM_DEVICEID_BCM57767:
                case BCOM_DEVICEID_BCM57787:
                        id = pci_read_config(dev,
                            BGE_PCI_GEN2_PRODID_ASICREV, 4);
                        break;
                case BCOM_DEVICEID_BCM57761:
                case BCOM_DEVICEID_BCM57762:
                case BCOM_DEVICEID_BCM57765:
                case BCOM_DEVICEID_BCM57766:
                case BCOM_DEVICEID_BCM57781:
                case BCOM_DEVICEID_BCM57782:
                case BCOM_DEVICEID_BCM57785:
                case BCOM_DEVICEID_BCM57786:
                case BCOM_DEVICEID_BCM57791:
                case BCOM_DEVICEID_BCM57795:
                        id = pci_read_config(dev,
                            BGE_PCI_GEN15_PRODID_ASICREV, 4);
                        break;
                default:
                        id = pci_read_config(dev, BGE_PCI_PRODID_ASICREV, 4);
                }
        }
        return (id);
}

/*
 * Probe for a Broadcom chip. Check the PCI vendor and device IDs
 * against our list and return its name if we find a match.
 *
 * Note that since the Broadcom controller contains VPD support, we
 * try to get the device name string from the controller itself instead
 * of the compiled-in string. It guarantees we'll always announce the
 * right product name. We fall back to the compiled-in string when
 * VPD is unavailable or corrupt.
 */
static int
bge_probe(device_t dev)
{
        char buf[96];
        char model[64];
        const struct bge_revision *br;
        const char *pname;
        struct bge_softc *sc;
        const struct bge_type *t = bge_devs;
        const struct bge_vendor *v;
        uint32_t id;
        uint16_t did, vid;

        sc = device_get_softc(dev);
        sc->bge_dev = dev;
        vid = pci_get_vendor(dev);
        did = pci_get_device(dev);
        while(t->bge_vid != 0) {
                if ((vid == t->bge_vid) && (did == t->bge_did)) {
                        id = bge_chipid(dev);
                        br = bge_lookup_rev(id);
                        if (bge_has_eaddr(sc) &&
                            pci_get_vpd_ident(dev, &pname) == 0)
                                snprintf(model, sizeof(model), "%s", pname);
                        else {
                                v = bge_lookup_vendor(vid);
                                snprintf(model, sizeof(model), "%s %s",
                                    v != NULL ? v->v_name : "Unknown",
                                    br != NULL ? br->br_name :
                                    "NetXtreme/NetLink Ethernet Controller");
                        }
                        snprintf(buf, sizeof(buf), "%s, %sASIC rev. %#08x",
                            model, br != NULL ? "" : "unknown ", id);
                        device_set_desc_copy(dev, buf);
                        return (BUS_PROBE_DEFAULT);
                }
                t++;
        }

        return (ENXIO);
}

static void
bge_dma_free(struct bge_softc *sc)
{
        int i;

        /* Destroy DMA maps for RX buffers. */
        for (i = 0; i < BGE_STD_RX_RING_CNT; i++) {
                if (sc->bge_cdata.bge_rx_std_dmamap[i])
                        bus_dmamap_destroy(sc->bge_cdata.bge_rx_mtag,
                            sc->bge_cdata.bge_rx_std_dmamap[i]);
        }
        if (sc->bge_cdata.bge_rx_std_sparemap)
                bus_dmamap_destroy(sc->bge_cdata.bge_rx_mtag,
                    sc->bge_cdata.bge_rx_std_sparemap);

        /* Destroy DMA maps for jumbo RX buffers. */
        for (i = 0; i < BGE_JUMBO_RX_RING_CNT; i++) {
                if (sc->bge_cdata.bge_rx_jumbo_dmamap[i])
                        bus_dmamap_destroy(sc->bge_cdata.bge_mtag_jumbo,
                            sc->bge_cdata.bge_rx_jumbo_dmamap[i]);
        }
        if (sc->bge_cdata.bge_rx_jumbo_sparemap)
                bus_dmamap_destroy(sc->bge_cdata.bge_mtag_jumbo,
                    sc->bge_cdata.bge_rx_jumbo_sparemap);

        /* Destroy DMA maps for TX buffers. */
        for (i = 0; i < BGE_TX_RING_CNT; i++) {
                if (sc->bge_cdata.bge_tx_dmamap[i])
                        bus_dmamap_destroy(sc->bge_cdata.bge_tx_mtag,
                            sc->bge_cdata.bge_tx_dmamap[i]);
        }

        if (sc->bge_cdata.bge_rx_mtag)
                bus_dma_tag_destroy(sc->bge_cdata.bge_rx_mtag);
        if (sc->bge_cdata.bge_mtag_jumbo)
                bus_dma_tag_destroy(sc->bge_cdata.bge_mtag_jumbo);
        if (sc->bge_cdata.bge_tx_mtag)
                bus_dma_tag_destroy(sc->bge_cdata.bge_tx_mtag);

        /* Destroy standard RX ring. */
        if (sc->bge_cdata.bge_rx_std_ring_map)
                bus_dmamap_unload(sc->bge_cdata.bge_rx_std_ring_tag,
                    sc->bge_cdata.bge_rx_std_ring_map);
        if (sc->bge_cdata.bge_rx_std_ring_map && sc->bge_ldata.bge_rx_std_ring)
                bus_dmamem_free(sc->bge_cdata.bge_rx_std_ring_tag,
                    sc->bge_ldata.bge_rx_std_ring,
                    sc->bge_cdata.bge_rx_std_ring_map);

        if (sc->bge_cdata.bge_rx_std_ring_tag)
                bus_dma_tag_destroy(sc->bge_cdata.bge_rx_std_ring_tag);

        /* Destroy jumbo RX ring. */
        if (sc->bge_cdata.bge_rx_jumbo_ring_map)
                bus_dmamap_unload(sc->bge_cdata.bge_rx_jumbo_ring_tag,
                    sc->bge_cdata.bge_rx_jumbo_ring_map);

        if (sc->bge_cdata.bge_rx_jumbo_ring_map &&
            sc->bge_ldata.bge_rx_jumbo_ring)
                bus_dmamem_free(sc->bge_cdata.bge_rx_jumbo_ring_tag,
                    sc->bge_ldata.bge_rx_jumbo_ring,
                    sc->bge_cdata.bge_rx_jumbo_ring_map);

        if (sc->bge_cdata.bge_rx_jumbo_ring_tag)
                bus_dma_tag_destroy(sc->bge_cdata.bge_rx_jumbo_ring_tag);

        /* Destroy RX return ring. */
        if (sc->bge_cdata.bge_rx_return_ring_map)
                bus_dmamap_unload(sc->bge_cdata.bge_rx_return_ring_tag,
                    sc->bge_cdata.bge_rx_return_ring_map);

        if (sc->bge_cdata.bge_rx_return_ring_map &&
            sc->bge_ldata.bge_rx_return_ring)
                bus_dmamem_free(sc->bge_cdata.bge_rx_return_ring_tag,
                    sc->bge_ldata.bge_rx_return_ring,
                    sc->bge_cdata.bge_rx_return_ring_map);

        if (sc->bge_cdata.bge_rx_return_ring_tag)
                bus_dma_tag_destroy(sc->bge_cdata.bge_rx_return_ring_tag);

        /* Destroy TX ring. */
        if (sc->bge_cdata.bge_tx_ring_map)
                bus_dmamap_unload(sc->bge_cdata.bge_tx_ring_tag,
                    sc->bge_cdata.bge_tx_ring_map);

        if (sc->bge_cdata.bge_tx_ring_map && sc->bge_ldata.bge_tx_ring)
                bus_dmamem_free(sc->bge_cdata.bge_tx_ring_tag,
                    sc->bge_ldata.bge_tx_ring,
                    sc->bge_cdata.bge_tx_ring_map);

        if (sc->bge_cdata.bge_tx_ring_tag)
                bus_dma_tag_destroy(sc->bge_cdata.bge_tx_ring_tag);

        /* Destroy status block. */
        if (sc->bge_cdata.bge_status_map)
                bus_dmamap_unload(sc->bge_cdata.bge_status_tag,
                    sc->bge_cdata.bge_status_map);

        if (sc->bge_cdata.bge_status_map && sc->bge_ldata.bge_status_block)
                bus_dmamem_free(sc->bge_cdata.bge_status_tag,
                    sc->bge_ldata.bge_status_block,
                    sc->bge_cdata.bge_status_map);

        if (sc->bge_cdata.bge_status_tag)
                bus_dma_tag_destroy(sc->bge_cdata.bge_status_tag);

        /* Destroy statistics block. */
        if (sc->bge_cdata.bge_stats_map)
                bus_dmamap_unload(sc->bge_cdata.bge_stats_tag,
                    sc->bge_cdata.bge_stats_map);

        if (sc->bge_cdata.bge_stats_map && sc->bge_ldata.bge_stats)
                bus_dmamem_free(sc->bge_cdata.bge_stats_tag,
                    sc->bge_ldata.bge_stats,
                    sc->bge_cdata.bge_stats_map);

        if (sc->bge_cdata.bge_stats_tag)
                bus_dma_tag_destroy(sc->bge_cdata.bge_stats_tag);

        if (sc->bge_cdata.bge_buffer_tag)
                bus_dma_tag_destroy(sc->bge_cdata.bge_buffer_tag);

        /* Destroy the parent tag. */
        if (sc->bge_cdata.bge_parent_tag)
                bus_dma_tag_destroy(sc->bge_cdata.bge_parent_tag);
}

static int
bge_dma_ring_alloc(struct bge_softc *sc, bus_size_t alignment,
    bus_size_t maxsize, bus_dma_tag_t *tag, uint8_t **ring, bus_dmamap_t *map,
    bus_addr_t *paddr, const char *msg)
{
        struct bge_dmamap_arg ctx;
        bus_addr_t lowaddr;
        bus_size_t ring_end;
        int error;

        lowaddr = BUS_SPACE_MAXADDR;
again:
        error = bus_dma_tag_create(sc->bge_cdata.bge_parent_tag,
            alignment, 0, lowaddr, BUS_SPACE_MAXADDR, NULL,
            NULL, maxsize, 1, maxsize, 0, NULL, NULL, tag);
        if (error != 0) {
                device_printf(sc->bge_dev,
                    "could not create %s dma tag\n", msg);
                return (ENOMEM);
        }
        /* Allocate DMA'able memory for ring. */
        error = bus_dmamem_alloc(*tag, (void **)ring,
            BUS_DMA_NOWAIT | BUS_DMA_ZERO | BUS_DMA_COHERENT, map);
        if (error != 0) {
                device_printf(sc->bge_dev,
                    "could not allocate DMA'able memory for %s\n", msg);
                return (ENOMEM);
        }
        /* Load the address of the ring. */
        ctx.bge_busaddr = 0;
        error = bus_dmamap_load(*tag, *map, *ring, maxsize, bge_dma_map_addr,
            &ctx, BUS_DMA_NOWAIT);
        if (error != 0) {
                device_printf(sc->bge_dev,
                    "could not load DMA'able memory for %s\n", msg);
                return (ENOMEM);
        }
        *paddr = ctx.bge_busaddr;
        ring_end = *paddr + maxsize;
        if ((sc->bge_flags & BGE_FLAG_4G_BNDRY_BUG) != 0 &&
            BGE_ADDR_HI(*paddr) != BGE_ADDR_HI(ring_end)) {
                /*
                 * 4GB boundary crossed.  Limit maximum allowable DMA
                 * address space to 32bit and try again.
                 */
                bus_dmamap_unload(*tag, *map);
                bus_dmamem_free(*tag, *ring, *map);
                bus_dma_tag_destroy(*tag);
                if (bootverbose)
                        device_printf(sc->bge_dev, "4GB boundary crossed, "
                            "limit DMA address space to 32bit for %s\n", msg);
                *ring = NULL;
                *tag = NULL;
                *map = NULL;
                lowaddr = BUS_SPACE_MAXADDR_32BIT;
                goto again;
        }
        return (0);
}

static int
bge_dma_alloc(struct bge_softc *sc)
{
        bus_addr_t lowaddr;
        bus_size_t boundary, sbsz, rxmaxsegsz, txsegsz, txmaxsegsz;
        int i, error;

        lowaddr = BUS_SPACE_MAXADDR;
        if ((sc->bge_flags & BGE_FLAG_40BIT_BUG) != 0)
                lowaddr = BGE_DMA_MAXADDR;
        /*
         * Allocate the parent bus DMA tag appropriate for PCI.
         */
        error = bus_dma_tag_create(bus_get_dma_tag(sc->bge_dev),
            1, 0, lowaddr, BUS_SPACE_MAXADDR, NULL,
            NULL, BUS_SPACE_MAXSIZE_32BIT, 0, BUS_SPACE_MAXSIZE_32BIT,
            0, NULL, NULL, &sc->bge_cdata.bge_parent_tag);
        if (error != 0) {
                device_printf(sc->bge_dev,
                    "could not allocate parent dma tag\n");
                return (ENOMEM);
        }

        /* Create tag for standard RX ring. */
        error = bge_dma_ring_alloc(sc, PAGE_SIZE, BGE_STD_RX_RING_SZ,
            &sc->bge_cdata.bge_rx_std_ring_tag,
            (uint8_t **)&sc->bge_ldata.bge_rx_std_ring,
            &sc->bge_cdata.bge_rx_std_ring_map,
            &sc->bge_ldata.bge_rx_std_ring_paddr, "RX ring");
        if (error)
                return (error);

        /* Create tag for RX return ring. */
        error = bge_dma_ring_alloc(sc, PAGE_SIZE, BGE_RX_RTN_RING_SZ(sc),
            &sc->bge_cdata.bge_rx_return_ring_tag,
            (uint8_t **)&sc->bge_ldata.bge_rx_return_ring,
            &sc->bge_cdata.bge_rx_return_ring_map,
            &sc->bge_ldata.bge_rx_return_ring_paddr, "RX return ring");
        if (error)
                return (error);

        /* Create tag for TX ring. */
        error = bge_dma_ring_alloc(sc, PAGE_SIZE, BGE_TX_RING_SZ,
            &sc->bge_cdata.bge_tx_ring_tag,
            (uint8_t **)&sc->bge_ldata.bge_tx_ring,
            &sc->bge_cdata.bge_tx_ring_map,
            &sc->bge_ldata.bge_tx_ring_paddr, "TX ring");
        if (error)
                return (error);

        /*
         * Create tag for status block.
         * Because we only use single Tx/Rx/Rx return ring, use
         * minimum status block size except BCM5700 AX/BX which
         * seems to want to see full status block size regardless
         * of configured number of ring.
         */
        if (sc->bge_asicrev == BGE_ASICREV_BCM5700 &&
            sc->bge_chipid != BGE_CHIPID_BCM5700_C0)
                sbsz = BGE_STATUS_BLK_SZ;
        else
                sbsz = 32;
        error = bge_dma_ring_alloc(sc, PAGE_SIZE, sbsz,
            &sc->bge_cdata.bge_status_tag,
            (uint8_t **)&sc->bge_ldata.bge_status_block,
            &sc->bge_cdata.bge_status_map,
            &sc->bge_ldata.bge_status_block_paddr, "status block");
        if (error)
                return (error);

        /* Create tag for statistics block. */
        error = bge_dma_ring_alloc(sc, PAGE_SIZE, BGE_STATS_SZ,
            &sc->bge_cdata.bge_stats_tag,
            (uint8_t **)&sc->bge_ldata.bge_stats,
            &sc->bge_cdata.bge_stats_map,
            &sc->bge_ldata.bge_stats_paddr, "statistics block");
        if (error)
                return (error);

        /* Create tag for jumbo RX ring. */
        if (BGE_IS_JUMBO_CAPABLE(sc)) {
                error = bge_dma_ring_alloc(sc, PAGE_SIZE, BGE_JUMBO_RX_RING_SZ,
                    &sc->bge_cdata.bge_rx_jumbo_ring_tag,
                    (uint8_t **)&sc->bge_ldata.bge_rx_jumbo_ring,
                    &sc->bge_cdata.bge_rx_jumbo_ring_map,
                    &sc->bge_ldata.bge_rx_jumbo_ring_paddr, "jumbo RX ring");
                if (error)
                        return (error);
        }

        /* Create parent tag for buffers. */
        boundary = 0;
        if ((sc->bge_flags & BGE_FLAG_4G_BNDRY_BUG) != 0) {
                boundary = BGE_DMA_BNDRY;
                /*
                 * XXX
                 * watchdog timeout issue was observed on BCM5704 which
                 * lives behind PCI-X bridge(e.g AMD 8131 PCI-X bridge).
                 * Both limiting DMA address space to 32bits and flushing
                 * mailbox write seem to address the issue.
                 */
                if (sc->bge_pcixcap != 0)
                        lowaddr = BUS_SPACE_MAXADDR_32BIT;
        }
        error = bus_dma_tag_create(bus_get_dma_tag(sc->bge_dev),
            1, boundary, lowaddr, BUS_SPACE_MAXADDR, NULL,
            NULL, BUS_SPACE_MAXSIZE_32BIT, 0, BUS_SPACE_MAXSIZE_32BIT,
            0, NULL, NULL, &sc->bge_cdata.bge_buffer_tag);
        if (error != 0) {
                device_printf(sc->bge_dev,
                    "could not allocate buffer dma tag\n");
                return (ENOMEM);
        }
        /* Create tag for Tx mbufs. */
        if (sc->bge_flags & (BGE_FLAG_TSO | BGE_FLAG_TSO3)) {
                txsegsz = BGE_TSOSEG_SZ;
                txmaxsegsz = 65535 + sizeof(struct ether_vlan_header);
        } else {
                txsegsz = MCLBYTES;
                txmaxsegsz = MCLBYTES * BGE_NSEG_NEW;
        }
        error = bus_dma_tag_create(sc->bge_cdata.bge_buffer_tag, 1,
            0, BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR, NULL, NULL,
            txmaxsegsz, BGE_NSEG_NEW, txsegsz, 0, NULL, NULL,
            &sc->bge_cdata.bge_tx_mtag);

        if (error) {
                device_printf(sc->bge_dev, "could not allocate TX dma tag\n");
                return (ENOMEM);
        }

        /* Create tag for Rx mbufs. */
        if (sc->bge_flags & BGE_FLAG_JUMBO_STD)
                rxmaxsegsz = MJUM9BYTES;
        else
                rxmaxsegsz = MCLBYTES;
        error = bus_dma_tag_create(sc->bge_cdata.bge_buffer_tag, 1, 0,
            BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR, NULL, NULL, rxmaxsegsz, 1,
            rxmaxsegsz, 0, NULL, NULL, &sc->bge_cdata.bge_rx_mtag);

        if (error) {
                device_printf(sc->bge_dev, "could not allocate RX dma tag\n");
                return (ENOMEM);
        }

        /* Create DMA maps for RX buffers. */
        error = bus_dmamap_create(sc->bge_cdata.bge_rx_mtag, 0,
            &sc->bge_cdata.bge_rx_std_sparemap);
        if (error) {
                device_printf(sc->bge_dev,
                    "can't create spare DMA map for RX\n");
                return (ENOMEM);
        }
        for (i = 0; i < BGE_STD_RX_RING_CNT; i++) {
                error = bus_dmamap_create(sc->bge_cdata.bge_rx_mtag, 0,
                            &sc->bge_cdata.bge_rx_std_dmamap[i]);
                if (error) {
                        device_printf(sc->bge_dev,
                            "can't create DMA map for RX\n");
                        return (ENOMEM);
                }
        }

        /* Create DMA maps for TX buffers. */
        for (i = 0; i < BGE_TX_RING_CNT; i++) {
                error = bus_dmamap_create(sc->bge_cdata.bge_tx_mtag, 0,
                            &sc->bge_cdata.bge_tx_dmamap[i]);
                if (error) {
                        device_printf(sc->bge_dev,
                            "can't create DMA map for TX\n");
                        return (ENOMEM);
                }
        }

        /* Create tags for jumbo RX buffers. */
        if (BGE_IS_JUMBO_CAPABLE(sc)) {
                error = bus_dma_tag_create(sc->bge_cdata.bge_buffer_tag,
                    1, 0, BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR, NULL,
                    NULL, MJUM9BYTES, BGE_NSEG_JUMBO, PAGE_SIZE,
                    0, NULL, NULL, &sc->bge_cdata.bge_mtag_jumbo);
                if (error) {
                        device_printf(sc->bge_dev,
                            "could not allocate jumbo dma tag\n");
                        return (ENOMEM);
                }
                /* Create DMA maps for jumbo RX buffers. */
                error = bus_dmamap_create(sc->bge_cdata.bge_mtag_jumbo,
                    0, &sc->bge_cdata.bge_rx_jumbo_sparemap);
                if (error) {
                        device_printf(sc->bge_dev,
                            "can't create spare DMA map for jumbo RX\n");
                        return (ENOMEM);
                }
                for (i = 0; i < BGE_JUMBO_RX_RING_CNT; i++) {
                        error = bus_dmamap_create(sc->bge_cdata.bge_mtag_jumbo,
                                    0, &sc->bge_cdata.bge_rx_jumbo_dmamap[i]);
                        if (error) {
                                device_printf(sc->bge_dev,
                                    "can't create DMA map for jumbo RX\n");
                                return (ENOMEM);
                        }
                }
        }

        return (0);
}

/*
 * Return true if this device has more than one port.
 */
static int
bge_has_multiple_ports(struct bge_softc *sc)
{
        device_t dev = sc->bge_dev;
        u_int b, d, f, fscan, s;

        d = pci_get_domain(dev);
        b = pci_get_bus(dev);
        s = pci_get_slot(dev);
        f = pci_get_function(dev);
        for (fscan = 0; fscan <= PCI_FUNCMAX; fscan++)
                if (fscan != f && pci_find_dbsf(d, b, s, fscan) != NULL)
                        return (1);
        return (0);
}

/*
 * Return true if MSI can be used with this device.
 */
static int
bge_can_use_msi(struct bge_softc *sc)
{
        int can_use_msi = 0;

        if (sc->bge_msi == 0)
                return (0);

        /* Disable MSI for polling(4). */
#ifdef DEVICE_POLLING
        return (0);
#endif
        switch (sc->bge_asicrev) {
        case BGE_ASICREV_BCM5714_A0:
        case BGE_ASICREV_BCM5714:
                /*
                 * Apparently, MSI doesn't work when these chips are
                 * configured in single-port mode.
                 */
                if (bge_has_multiple_ports(sc))
                        can_use_msi = 1;
                break;
        case BGE_ASICREV_BCM5750:
                if (sc->bge_chiprev != BGE_CHIPREV_5750_AX &&
                    sc->bge_chiprev != BGE_CHIPREV_5750_BX)
                        can_use_msi = 1;
                break;
        default:
                if (BGE_IS_575X_PLUS(sc))
                        can_use_msi = 1;
        }
        return (can_use_msi);
}

static int
bge_mbox_reorder(struct bge_softc *sc)
{
        /* Lists of PCI bridges that are known to reorder mailbox writes. */
        static const struct mbox_reorder {
                const uint16_t vendor;
                const uint16_t device;
                const char *desc;
        } mbox_reorder_lists[] = {
                { 0x1022, 0x7450, "AMD-8131 PCI-X Bridge" },
        };
        devclass_t pci, pcib;
        device_t bus, dev;
        int i;

        pci = devclass_find("pci");
        pcib = devclass_find("pcib");
        dev = sc->bge_dev;
        bus = device_get_parent(dev);
        for (;;) {
                dev = device_get_parent(bus);
                bus = device_get_parent(dev);
                if (device_get_devclass(dev) != pcib)
                        break;
                for (i = 0; i < nitems(mbox_reorder_lists); i++) {
                        if (pci_get_vendor(dev) ==
                            mbox_reorder_lists[i].vendor &&
                            pci_get_device(dev) ==
                            mbox_reorder_lists[i].device) {
                                device_printf(sc->bge_dev,
                                    "enabling MBOX workaround for %s\n",
                                    mbox_reorder_lists[i].desc);
                                return (1);
                        }
                }
                if (device_get_devclass(bus) != pci)
                        break;
        }
        return (0);
}

static void
bge_devinfo(struct bge_softc *sc)
{
        uint32_t cfg, clk;

        device_printf(sc->bge_dev,
            "CHIP ID 0x%08x; ASIC REV 0x%02x; CHIP REV 0x%02x; ",
            sc->bge_chipid, sc->bge_asicrev, sc->bge_chiprev);
        if (sc->bge_flags & BGE_FLAG_PCIE)
                printf("PCI-E\n");
        else if (sc->bge_flags & BGE_FLAG_PCIX) {
                printf("PCI-X ");
                cfg = CSR_READ_4(sc, BGE_MISC_CFG) & BGE_MISCCFG_BOARD_ID_MASK;
                if (cfg == BGE_MISCCFG_BOARD_ID_5704CIOBE)
                        clk = 133;
                else {
                        clk = CSR_READ_4(sc, BGE_PCI_CLKCTL) & 0x1F;
                        switch (clk) {
                        case 0:
                                clk = 33;
                                break;
                        case 2:
                                clk = 50;
                                break;
                        case 4:
                                clk = 66;
                                break;
                        case 6:
                                clk = 100;
                                break;
                        case 7:
                                clk = 133;
                                break;
                        }
                }
                printf("%u MHz\n", clk);
        } else {
                if (sc->bge_pcixcap != 0)
                        printf("PCI on PCI-X ");
                else
                        printf("PCI ");
                cfg = pci_read_config(sc->bge_dev, BGE_PCI_PCISTATE, 4);
                if (cfg & BGE_PCISTATE_PCI_BUSSPEED)
                        clk = 66;
                else
                        clk = 33;
                if (cfg & BGE_PCISTATE_32BIT_BUS)
                        printf("%u MHz; 32bit\n", clk);
                else
                        printf("%u MHz; 64bit\n", clk);
        }
}

static int
bge_attach(device_t dev)
{
        struct ifnet *ifp;
        struct bge_softc *sc;
        uint32_t hwcfg = 0, misccfg, pcistate;
        u_char eaddr[ETHER_ADDR_LEN];
        int capmask, error, reg, rid, trys;

        sc = device_get_softc(dev);
        sc->bge_dev = dev;

        BGE_LOCK_INIT(sc, device_get_nameunit(dev));
        TASK_INIT(&sc->bge_intr_task, 0, bge_intr_task, sc);
        callout_init_mtx(&sc->bge_stat_ch, &sc->bge_mtx, 0);

        pci_enable_busmaster(dev);

        /*
         * Allocate control/status registers.
         */
        rid = PCIR_BAR(0);
        sc->bge_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
            RF_ACTIVE);

        if (sc->bge_res == NULL) {
                device_printf (sc->bge_dev, "couldn't map BAR0 memory\n");
                error = ENXIO;
                goto fail;
        }

        /* Save various chip information. */
        sc->bge_func_addr = pci_get_function(dev);
        sc->bge_chipid = bge_chipid(dev);
        sc->bge_asicrev = BGE_ASICREV(sc->bge_chipid);
        sc->bge_chiprev = BGE_CHIPREV(sc->bge_chipid);

        /* Set default PHY address. */
        sc->bge_phy_addr = 1;
         /*
          * PHY address mapping for various devices.
          *
          *          | F0 Cu | F0 Sr | F1 Cu | F1 Sr |
          * ---------+-------+-------+-------+-------+
          * BCM57XX  |   1   |   X   |   X   |   X   |
          * BCM5704  |   1   |   X   |   1   |   X   |
          * BCM5717  |   1   |   8   |   2   |   9   |
          * BCM5719  |   1   |   8   |   2   |   9   |
          * BCM5720  |   1   |   8   |   2   |   9   |
          *
          *          | F2 Cu | F2 Sr | F3 Cu | F3 Sr |
          * ---------+-------+-------+-------+-------+
          * BCM57XX  |   X   |   X   |   X   |   X   |
          * BCM5704  |   X   |   X   |   X   |   X   |
          * BCM5717  |   X   |   X   |   X   |   X   |
          * BCM5719  |   3   |   10  |   4   |   11  |
          * BCM5720  |   X   |   X   |   X   |   X   |
          *
          * Other addresses may respond but they are not
          * IEEE compliant PHYs and should be ignored.
          */
        if (sc->bge_asicrev == BGE_ASICREV_BCM5717 ||
            sc->bge_asicrev == BGE_ASICREV_BCM5719 ||
            sc->bge_asicrev == BGE_ASICREV_BCM5720) {
                if (sc->bge_chipid != BGE_CHIPID_BCM5717_A0) {
                        if (CSR_READ_4(sc, BGE_SGDIG_STS) &
                            BGE_SGDIGSTS_IS_SERDES)
                                sc->bge_phy_addr = sc->bge_func_addr + 8;
                        else
                                sc->bge_phy_addr = sc->bge_func_addr + 1;
                } else {
                        if (CSR_READ_4(sc, BGE_CPMU_PHY_STRAP) &
                            BGE_CPMU_PHY_STRAP_IS_SERDES)
                                sc->bge_phy_addr = sc->bge_func_addr + 8;
                        else
                                sc->bge_phy_addr = sc->bge_func_addr + 1;
                }
        }

        if (bge_has_eaddr(sc))
                sc->bge_flags |= BGE_FLAG_EADDR;

        /* Save chipset family. */
        switch (sc->bge_asicrev) {
        case BGE_ASICREV_BCM5762:
        case BGE_ASICREV_BCM57765:
        case BGE_ASICREV_BCM57766:
                sc->bge_flags |= BGE_FLAG_57765_PLUS;
                /* FALLTHROUGH */
        case BGE_ASICREV_BCM5717:
        case BGE_ASICREV_BCM5719:
        case BGE_ASICREV_BCM5720:
                sc->bge_flags |= BGE_FLAG_5717_PLUS | BGE_FLAG_5755_PLUS |
                    BGE_FLAG_575X_PLUS | BGE_FLAG_5705_PLUS | BGE_FLAG_JUMBO |
                    BGE_FLAG_JUMBO_FRAME;
                if (sc->bge_asicrev == BGE_ASICREV_BCM5719 ||
                    sc->bge_asicrev == BGE_ASICREV_BCM5720) {
                        /*
                         * Enable work around for DMA engine miscalculation
                         * of TXMBUF available space.
                         */
                        sc->bge_flags |= BGE_FLAG_RDMA_BUG;
                        if (sc->bge_asicrev == BGE_ASICREV_BCM5719 &&
                            sc->bge_chipid == BGE_CHIPID_BCM5719_A0) {
                                /* Jumbo frame on BCM5719 A0 does not work. */
                                sc->bge_flags &= ~BGE_FLAG_JUMBO;
                        }
                }
                break;
        case BGE_ASICREV_BCM5755:
        case BGE_ASICREV_BCM5761:
        case BGE_ASICREV_BCM5784:
        case BGE_ASICREV_BCM5785:
        case BGE_ASICREV_BCM5787:
        case BGE_ASICREV_BCM57780:
                sc->bge_flags |= BGE_FLAG_5755_PLUS | BGE_FLAG_575X_PLUS |
                    BGE_FLAG_5705_PLUS;
                break;
        case BGE_ASICREV_BCM5700:
        case BGE_ASICREV_BCM5701:
        case BGE_ASICREV_BCM5703:
        case BGE_ASICREV_BCM5704:
                sc->bge_flags |= BGE_FLAG_5700_FAMILY | BGE_FLAG_JUMBO;
                break;
        case BGE_ASICREV_BCM5714_A0:
        case BGE_ASICREV_BCM5780:
        case BGE_ASICREV_BCM5714:
                sc->bge_flags |= BGE_FLAG_5714_FAMILY | BGE_FLAG_JUMBO_STD;
                /* FALLTHROUGH */
        case BGE_ASICREV_BCM5750:
        case BGE_ASICREV_BCM5752:
        case BGE_ASICREV_BCM5906:
                sc->bge_flags |= BGE_FLAG_575X_PLUS;
                /* FALLTHROUGH */
        case BGE_ASICREV_BCM5705:
                sc->bge_flags |= BGE_FLAG_5705_PLUS;
                break;
        }

        /* Identify chips with APE processor. */
        switch (sc->bge_asicrev) {
        case BGE_ASICREV_BCM5717:
        case BGE_ASICREV_BCM5719:
        case BGE_ASICREV_BCM5720:
        case BGE_ASICREV_BCM5761:
        case BGE_ASICREV_BCM5762:
                sc->bge_flags |= BGE_FLAG_APE;
                break;
        }

        /* Chips with APE need BAR2 access for APE registers/memory. */
        if ((sc->bge_flags & BGE_FLAG_APE) != 0) {
                rid = PCIR_BAR(2);
                sc->bge_res2 = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid,
                    RF_ACTIVE);
                if (sc->bge_res2 == NULL) {
                        device_printf (sc->bge_dev,
                            "couldn't map BAR2 memory\n");
                        error = ENXIO;
                        goto fail;
                }

                /* Enable APE register/memory access by host driver. */
                pcistate = pci_read_config(dev, BGE_PCI_PCISTATE, 4);
                pcistate |= BGE_PCISTATE_ALLOW_APE_CTLSPC_WR |
                    BGE_PCISTATE_ALLOW_APE_SHMEM_WR |
                    BGE_PCISTATE_ALLOW_APE_PSPACE_WR;
                pci_write_config(dev, BGE_PCI_PCISTATE, pcistate, 4);

                bge_ape_lock_init(sc);
                bge_ape_read_fw_ver(sc);
        }

        /* Add SYSCTLs, requires the chipset family to be set. */
        bge_add_sysctls(sc);

        /* Identify the chips that use an CPMU. */
        if (BGE_IS_5717_PLUS(sc) ||
            sc->bge_asicrev == BGE_ASICREV_BCM5784 ||
            sc->bge_asicrev == BGE_ASICREV_BCM5761 ||
            sc->bge_asicrev == BGE_ASICREV_BCM5785 ||
            sc->bge_asicrev == BGE_ASICREV_BCM57780)
                sc->bge_flags |= BGE_FLAG_CPMU_PRESENT;
        if ((sc->bge_flags & BGE_FLAG_CPMU_PRESENT) != 0)
                sc->bge_mi_mode = BGE_MIMODE_500KHZ_CONST;
        else
                sc->bge_mi_mode = BGE_MIMODE_BASE;
        /* Enable auto polling for BCM570[0-5]. */
        if (BGE_IS_5700_FAMILY(sc) || sc->bge_asicrev == BGE_ASICREV_BCM5705)
                sc->bge_mi_mode |= BGE_MIMODE_AUTOPOLL;

        /*
         * All Broadcom controllers have 4GB boundary DMA bug.
         * Whenever an address crosses a multiple of the 4GB boundary
         * (including 4GB, 8Gb, 12Gb, etc.) and makes the transition
         * from 0xX_FFFF_FFFF to 0x(X+1)_0000_0000 an internal DMA
         * state machine will lockup and cause the device to hang.
         */
        sc->bge_flags |= BGE_FLAG_4G_BNDRY_BUG;

        /* BCM5755 or higher and BCM5906 have short DMA bug. */
        if (BGE_IS_5755_PLUS(sc) || sc->bge_asicrev == BGE_ASICREV_BCM5906)
                sc->bge_flags |= BGE_FLAG_SHORT_DMA_BUG;

        /*
         * BCM5719 cannot handle DMA requests for DMA segments that
         * have larger than 4KB in size.  However the maximum DMA
         * segment size created in DMA tag is 4KB for TSO, so we
         * wouldn't encounter the issue here.
         */
        if (sc->bge_asicrev == BGE_ASICREV_BCM5719)
                sc->bge_flags |= BGE_FLAG_4K_RDMA_BUG;

        misccfg = CSR_READ_4(sc, BGE_MISC_CFG) & BGE_MISCCFG_BOARD_ID_MASK;
        if (sc->bge_asicrev == BGE_ASICREV_BCM5705) {
                if (misccfg == BGE_MISCCFG_BOARD_ID_5788 ||
                    misccfg == BGE_MISCCFG_BOARD_ID_5788M)
                        sc->bge_flags |= BGE_FLAG_5788;
        }

        capmask = BMSR_DEFCAPMASK;
        if ((sc->bge_asicrev == BGE_ASICREV_BCM5703 &&
            (misccfg == 0x4000 || misccfg == 0x8000)) ||
            (sc->bge_asicrev == BGE_ASICREV_BCM5705 &&
            pci_get_vendor(dev) == BCOM_VENDORID &&
            (pci_get_device(dev) == BCOM_DEVICEID_BCM5901 ||
            pci_get_device(dev) == BCOM_DEVICEID_BCM5901A2 ||
            pci_get_device(dev) == BCOM_DEVICEID_BCM5705F)) ||
            (pci_get_vendor(dev) == BCOM_VENDORID &&
            (pci_get_device(dev) == BCOM_DEVICEID_BCM5751F ||
            pci_get_device(dev) == BCOM_DEVICEID_BCM5753F ||
            pci_get_device(dev) == BCOM_DEVICEID_BCM5787F)) ||
            pci_get_device(dev) == BCOM_DEVICEID_BCM57790 ||
            pci_get_device(dev) == BCOM_DEVICEID_BCM57791 ||
            pci_get_device(dev) == BCOM_DEVICEID_BCM57795 ||
            sc->bge_asicrev == BGE_ASICREV_BCM5906) {
                /* These chips are 10/100 only. */
                capmask &= ~BMSR_EXTSTAT;
                sc->bge_phy_flags |= BGE_PHY_NO_WIRESPEED;
        }

        /*
         * Some controllers seem to require a special firmware to use
         * TSO. But the firmware is not available to FreeBSD and Linux
         * claims that the TSO performed by the firmware is slower than
         * hardware based TSO. Moreover the firmware based TSO has one
         * known bug which can't handle TSO if Ethernet header + IP/TCP
         * header is greater than 80 bytes. A workaround for the TSO
         * bug exist but it seems it's too expensive than not using
         * TSO at all. Some hardwares also have the TSO bug so limit
         * the TSO to the controllers that are not affected TSO issues
         * (e.g. 5755 or higher).
         */
        if (BGE_IS_5717_PLUS(sc)) {
                /* BCM5717 requires different TSO configuration. */
                sc->bge_flags |= BGE_FLAG_TSO3;
                if (sc->bge_asicrev == BGE_ASICREV_BCM5719 &&
                    sc->bge_chipid == BGE_CHIPID_BCM5719_A0) {
                        /* TSO on BCM5719 A0 does not work. */
                        sc->bge_flags &= ~BGE_FLAG_TSO3;
                }
        } else if (BGE_IS_5755_PLUS(sc)) {
                /*
                 * BCM5754 and BCM5787 shares the same ASIC id so
                 * explicit device id check is required.
                 * Due to unknown reason TSO does not work on BCM5755M.
                 */
                if (pci_get_device(dev) != BCOM_DEVICEID_BCM5754 &&
                    pci_get_device(dev) != BCOM_DEVICEID_BCM5754M &&
                    pci_get_device(dev) != BCOM_DEVICEID_BCM5755M)
                        sc->bge_flags |= BGE_FLAG_TSO;
        }

        /*
         * Check if this is a PCI-X or PCI Express device.
         */
        if (pci_find_cap(dev, PCIY_EXPRESS, &reg) == 0) {
                /*
                 * Found a PCI Express capabilities register, this
                 * must be a PCI Express device.
                 */
                sc->bge_flags |= BGE_FLAG_PCIE;
                sc->bge_expcap = reg;
                /* Extract supported maximum payload size. */
                sc->bge_mps = pci_read_config(dev, sc->bge_expcap +
                    PCIER_DEVICE_CAP, 2);
                sc->bge_mps = 128 << (sc->bge_mps & PCIEM_CAP_MAX_PAYLOAD);
                if (sc->bge_asicrev == BGE_ASICREV_BCM5719 ||
                    sc->bge_asicrev == BGE_ASICREV_BCM5720)
                        sc->bge_expmrq = 2048;
                else
                        sc->bge_expmrq = 4096;
                pci_set_max_read_req(dev, sc->bge_expmrq);
        } else {
                /*
                 * Check if the device is in PCI-X Mode.
                 * (This bit is not valid on PCI Express controllers.)
                 */
                if (pci_find_cap(dev, PCIY_PCIX, &reg) == 0)
                        sc->bge_pcixcap = reg;
                if ((pci_read_config(dev, BGE_PCI_PCISTATE, 4) &
                    BGE_PCISTATE_PCI_BUSMODE) == 0)
                        sc->bge_flags |= BGE_FLAG_PCIX;
        }

        /*
         * The 40bit DMA bug applies to the 5714/5715 controllers and is
         * not actually a MAC controller bug but an issue with the embedded
         * PCIe to PCI-X bridge in the device. Use 40bit DMA workaround.
         */
        if (BGE_IS_5714_FAMILY(sc) && (sc->bge_flags & BGE_FLAG_PCIX))
                sc->bge_flags |= BGE_FLAG_40BIT_BUG;
        /*
         * Some PCI-X bridges are known to trigger write reordering to
         * the mailbox registers. Typical phenomena is watchdog timeouts
         * caused by out-of-order TX completions.  Enable workaround for
         * PCI-X devices that live behind these bridges.
         * Note, PCI-X controllers can run in PCI mode so we can't use
         * BGE_FLAG_PCIX flag to detect PCI-X controllers.
         */
        if (sc->bge_pcixcap != 0 && bge_mbox_reorder(sc) != 0)
                sc->bge_flags |= BGE_FLAG_MBOX_REORDER;
        /*
         * Allocate the interrupt, using MSI if possible.  These devices
         * support 8 MSI messages, but only the first one is used in
         * normal operation.
         */
        rid = 0;
        if (pci_find_cap(sc->bge_dev, PCIY_MSI, &reg) == 0) {
                sc->bge_msicap = reg;
                reg = 1;
                if (bge_can_use_msi(sc) && pci_alloc_msi(dev, &reg) == 0) {
                        rid = 1;
                        sc->bge_flags |= BGE_FLAG_MSI;
                }
        }

        /*
         * All controllers except BCM5700 supports tagged status but
         * we use tagged status only for MSI case on BCM5717. Otherwise
         * MSI on BCM5717 does not work.
         */
#ifndef DEVICE_POLLING
        if (sc->bge_flags & BGE_FLAG_MSI && BGE_IS_5717_PLUS(sc))
                sc->bge_flags |= BGE_FLAG_TAGGED_STATUS;
#endif

        sc->bge_irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
            RF_ACTIVE | (rid != 0 ? 0 : RF_SHAREABLE));

        if (sc->bge_irq == NULL) {
                device_printf(sc->bge_dev, "couldn't map interrupt\n");
                error = ENXIO;
                goto fail;
        }

        bge_devinfo(sc);

        sc->bge_asf_mode = 0;
        /* No ASF if APE present. */
        if ((sc->bge_flags & BGE_FLAG_APE) == 0) {
                if (bge_allow_asf && (bge_readmem_ind(sc, BGE_SRAM_DATA_SIG) ==
                    BGE_SRAM_DATA_SIG_MAGIC)) {
                        if (bge_readmem_ind(sc, BGE_SRAM_DATA_CFG) &
                            BGE_HWCFG_ASF) {
                                sc->bge_asf_mode |= ASF_ENABLE;
                                sc->bge_asf_mode |= ASF_STACKUP;
                                if (BGE_IS_575X_PLUS(sc))
                                        sc->bge_asf_mode |= ASF_NEW_HANDSHAKE;
                        }
                }
        }

        bge_stop_fw(sc);
        bge_sig_pre_reset(sc, BGE_RESET_SHUTDOWN);
        if (bge_reset(sc)) {
                device_printf(sc->bge_dev, "chip reset failed\n");
                error = ENXIO;
                goto fail;
        }

        bge_sig_legacy(sc, BGE_RESET_SHUTDOWN);
        bge_sig_post_reset(sc, BGE_RESET_SHUTDOWN);

        if (bge_chipinit(sc)) {
                device_printf(sc->bge_dev, "chip initialization failed\n");
                error = ENXIO;
                goto fail;
        }

        error = bge_get_eaddr(sc, eaddr);
        if (error) {
                device_printf(sc->bge_dev,
                    "failed to read station address\n");
                error = ENXIO;
                goto fail;
        }

        /* 5705 limits RX return ring to 512 entries. */
        if (BGE_IS_5717_PLUS(sc))
                sc->bge_return_ring_cnt = BGE_RETURN_RING_CNT;
        else if (BGE_IS_5705_PLUS(sc))
                sc->bge_return_ring_cnt = BGE_RETURN_RING_CNT_5705;
        else
                sc->bge_return_ring_cnt = BGE_RETURN_RING_CNT;

        if (bge_dma_alloc(sc)) {
                device_printf(sc->bge_dev,
                    "failed to allocate DMA resources\n");
                error = ENXIO;
                goto fail;
        }

        /* Set default tuneable values. */
        sc->bge_stat_ticks = BGE_TICKS_PER_SEC;
        sc->bge_rx_coal_ticks = 150;
        sc->bge_tx_coal_ticks = 150;
        sc->bge_rx_max_coal_bds = 10;
        sc->bge_tx_max_coal_bds = 10;

        /* Initialize checksum features to use. */
        sc->bge_csum_features = BGE_CSUM_FEATURES;
        if (sc->bge_forced_udpcsum != 0)
                sc->bge_csum_features |= CSUM_UDP;

        /* Set up ifnet structure */
        ifp = sc->bge_ifp = if_alloc(IFT_ETHER);
        if (ifp == NULL) {
                device_printf(sc->bge_dev, "failed to if_alloc()\n");
                error = ENXIO;
                goto fail;
        }
        ifp->if_softc = sc;
        if_initname(ifp, device_get_name(dev), device_get_unit(dev));
        ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
        ifp->if_ioctl = bge_ioctl;
        ifp->if_start = bge_start;
        ifp->if_init = bge_init;
        ifp->if_snd.ifq_drv_maxlen = BGE_TX_RING_CNT - 1;
        IFQ_SET_MAXLEN(&ifp->if_snd, ifp->if_snd.ifq_drv_maxlen);
        IFQ_SET_READY(&ifp->if_snd);
        ifp->if_hwassist = sc->bge_csum_features;
        ifp->if_capabilities = IFCAP_HWCSUM | IFCAP_VLAN_HWTAGGING |
            IFCAP_VLAN_MTU;
        if ((sc->bge_flags & (BGE_FLAG_TSO | BGE_FLAG_TSO3)) != 0) {
                ifp->if_hwassist |= CSUM_TSO;
                ifp->if_capabilities |= IFCAP_TSO4 | IFCAP_VLAN_HWTSO;
        }
#ifdef IFCAP_VLAN_HWCSUM
        ifp->if_capabilities |= IFCAP_VLAN_HWCSUM;
#endif
        ifp->if_capenable = ifp->if_capabilities;
#ifdef DEVICE_POLLING
        ifp->if_capabilities |= IFCAP_POLLING;
#endif

        /*
         * 5700 B0 chips do not support checksumming correctly due
         * to hardware bugs.
         */
        if (sc->bge_chipid == BGE_CHIPID_BCM5700_B0) {
                ifp->if_capabilities &= ~IFCAP_HWCSUM;
                ifp->if_capenable &= ~IFCAP_HWCSUM;
                ifp->if_hwassist = 0;
        }

        /*
         * Figure out what sort of media we have by checking the
         * hardware config word in the first 32k of NIC internal memory,
         * or fall back to examining the EEPROM if necessary.
         * Note: on some BCM5700 cards, this value appears to be unset.
         * If that's the case, we have to rely on identifying the NIC
         * by its PCI subsystem ID, as we do below for the SysKonnect
         * SK-9D41.
         */
        if (bge_readmem_ind(sc, BGE_SRAM_DATA_SIG) == BGE_SRAM_DATA_SIG_MAGIC)
                hwcfg = bge_readmem_ind(sc, BGE_SRAM_DATA_CFG);
        else if ((sc->bge_flags & BGE_FLAG_EADDR) &&
            (sc->bge_asicrev != BGE_ASICREV_BCM5906)) {
                if (bge_read_eeprom(sc, (caddr_t)&hwcfg, BGE_EE_HWCFG_OFFSET,
                    sizeof(hwcfg))) {
                        device_printf(sc->bge_dev, "failed to read EEPROM\n");
                        error = ENXIO;
                        goto fail;
                }
                hwcfg = ntohl(hwcfg);
        }

        /* The SysKonnect SK-9D41 is a 1000baseSX card. */
        if ((pci_read_config(dev, BGE_PCI_SUBSYS, 4) >> 16) ==
            SK_SUBSYSID_9D41 || (hwcfg & BGE_HWCFG_MEDIA) == BGE_MEDIA_FIBER) {
                if (BGE_IS_5705_PLUS(sc)) {
                        sc->bge_flags |= BGE_FLAG_MII_SERDES;
                        sc->bge_phy_flags |= BGE_PHY_NO_WIRESPEED;
                } else
                        sc->bge_flags |= BGE_FLAG_TBI;
        }

        /* Set various PHY bug flags. */
        if (sc->bge_chipid == BGE_CHIPID_BCM5701_A0 ||
            sc->bge_chipid == BGE_CHIPID_BCM5701_B0)
                sc->bge_phy_flags |= BGE_PHY_CRC_BUG;
        if (sc->bge_chiprev == BGE_CHIPREV_5703_AX ||
            sc->bge_chiprev == BGE_CHIPREV_5704_AX)
                sc->bge_phy_flags |= BGE_PHY_ADC_BUG;
        if (sc->bge_chipid == BGE_CHIPID_BCM5704_A0)
                sc->bge_phy_flags |= BGE_PHY_5704_A0_BUG;
        if (pci_get_subvendor(dev) == DELL_VENDORID)
                sc->bge_phy_flags |= BGE_PHY_NO_3LED;
        if ((BGE_IS_5705_PLUS(sc)) &&
            sc->bge_asicrev != BGE_ASICREV_BCM5906 &&
            sc->bge_asicrev != BGE_ASICREV_BCM5785 &&
            sc->bge_asicrev != BGE_ASICREV_BCM57780 &&
            !BGE_IS_5717_PLUS(sc)) {
                if (sc->bge_asicrev == BGE_ASICREV_BCM5755 ||
                    sc->bge_asicrev == BGE_ASICREV_BCM5761 ||
                    sc->bge_asicrev == BGE_ASICREV_BCM5784 ||
                    sc->bge_asicrev == BGE_ASICREV_BCM5787) {
                        if (pci_get_device(dev) != BCOM_DEVICEID_BCM5722 &&
                            pci_get_device(dev) != BCOM_DEVICEID_BCM5756)
                                sc->bge_phy_flags |= BGE_PHY_JITTER_BUG;
                        if (pci_get_device(dev) == BCOM_DEVICEID_BCM5755M)
                                sc->bge_phy_flags |= BGE_PHY_ADJUST_TRIM;
                } else
                        sc->bge_phy_flags |= BGE_PHY_BER_BUG;
        }

        /*
         * Don't enable Ethernet@WireSpeed for the 5700 or the
         * 5705 A0 and A1 chips.
         */
        if (sc->bge_asicrev == BGE_ASICREV_BCM5700 ||
            (sc->bge_asicrev == BGE_ASICREV_BCM5705 &&
            (sc->bge_chipid != BGE_CHIPID_BCM5705_A0 &&
            sc->bge_chipid != BGE_CHIPID_BCM5705_A1)))
                sc->bge_phy_flags |= BGE_PHY_NO_WIRESPEED;

        if (sc->bge_flags & BGE_FLAG_TBI) {
                ifmedia_init(&sc->bge_ifmedia, IFM_IMASK, bge_ifmedia_upd,
                    bge_ifmedia_sts);
                ifmedia_add(&sc->bge_ifmedia, IFM_ETHER | IFM_1000_SX, 0, NULL);
                ifmedia_add(&sc->bge_ifmedia, IFM_ETHER | IFM_1000_SX | IFM_FDX,
                    0, NULL);
                ifmedia_add(&sc->bge_ifmedia, IFM_ETHER | IFM_AUTO, 0, NULL);
                ifmedia_set(&sc->bge_ifmedia, IFM_ETHER | IFM_AUTO);
                sc->bge_ifmedia.ifm_media = sc->bge_ifmedia.ifm_cur->ifm_media;
        } else {
                /*
                 * Do transceiver setup and tell the firmware the
                 * driver is down so we can try to get access the
                 * probe if ASF is running.  Retry a couple of times
                 * if we get a conflict with the ASF firmware accessing
                 * the PHY.
                 */
                trys = 0;
                BGE_CLRBIT(sc, BGE_MODE_CTL, BGE_MODECTL_STACKUP);
again:
                bge_asf_driver_up(sc);

                error = mii_attach(dev, &sc->bge_miibus, ifp, bge_ifmedia_upd,
                    bge_ifmedia_sts, capmask, sc->bge_phy_addr, MII_OFFSET_ANY,
                    MIIF_DOPAUSE);
                if (error != 0) {
                        if (trys++ < 4) {
                                device_printf(sc->bge_dev, "Try again\n");
                                bge_miibus_writereg(sc->bge_dev,
                                    sc->bge_phy_addr, MII_BMCR, BMCR_RESET);
                                goto again;
                        }
                        device_printf(sc->bge_dev, "attaching PHYs failed\n");
                        goto fail;
                }

                /*
                 * Now tell the firmware we are going up after probing the PHY
                 */
                if (sc->bge_asf_mode & ASF_STACKUP)
                        BGE_SETBIT(sc, BGE_MODE_CTL, BGE_MODECTL_STACKUP);
        }

        /*
         * When using the BCM5701 in PCI-X mode, data corruption has
         * been observed in the first few bytes of some received packets.
         * Aligning the packet buffer in memory eliminates the corruption.
         * Unfortunately, this misaligns the packet payloads.  On platforms
         * which do not support unaligned accesses, we will realign the
         * payloads by copying the received packets.
         */
        if (sc->bge_asicrev == BGE_ASICREV_BCM5701 &&
            sc->bge_flags & BGE_FLAG_PCIX)
                sc->bge_flags |= BGE_FLAG_RX_ALIGNBUG;

        /*
         * Call MI attach routine.
         */
        ether_ifattach(ifp, eaddr);

        /* Tell upper layer we support long frames. */
        ifp->if_data.ifi_hdrlen = sizeof(struct ether_vlan_header);

        /*
         * Hookup IRQ last.
         */
        if (BGE_IS_5755_PLUS(sc) && sc->bge_flags & BGE_FLAG_MSI) {
                /* Take advantage of single-shot MSI. */
                CSR_WRITE_4(sc, BGE_MSI_MODE, CSR_READ_4(sc, BGE_MSI_MODE) &
                    ~BGE_MSIMODE_ONE_SHOT_DISABLE);
                sc->bge_tq = taskqueue_create_fast("bge_taskq", M_WAITOK,
                    taskqueue_thread_enqueue, &sc->bge_tq);
                if (sc->bge_tq == NULL) {
                        device_printf(dev, "could not create taskqueue.\n");
                        ether_ifdetach(ifp);
                        error = ENOMEM;
                        goto fail;
                }
                error = taskqueue_start_threads(&sc->bge_tq, 1, PI_NET,
                    "%s taskq", device_get_nameunit(sc->bge_dev));
                if (error != 0) {
                        device_printf(dev, "could not start threads.\n");
                        ether_ifdetach(ifp);
                        goto fail;
                }
                error = bus_setup_intr(dev, sc->bge_irq,
                    INTR_TYPE_NET | INTR_MPSAFE, bge_msi_intr, NULL, sc,
                    &sc->bge_intrhand);
        } else
                error = bus_setup_intr(dev, sc->bge_irq,
                    INTR_TYPE_NET | INTR_MPSAFE, NULL, bge_intr, sc,
                    &sc->bge_intrhand);

        if (error) {
                ether_ifdetach(ifp);
                device_printf(sc->bge_dev, "couldn't set up irq\n");
        }

fail:
        if (error)
                bge_detach(dev);
        return (error);
}

static int
bge_detach(device_t dev)
{
        struct bge_softc *sc;
        struct ifnet *ifp;

        sc = device_get_softc(dev);
        ifp = sc->bge_ifp;

#ifdef DEVICE_POLLING
        if (ifp->if_capenable & IFCAP_POLLING)
                ether_poll_deregister(ifp);
#endif

        if (device_is_attached(dev)) {
                ether_ifdetach(ifp);
                BGE_LOCK(sc);
                bge_stop(sc);
                BGE_UNLOCK(sc);
                callout_drain(&sc->bge_stat_ch);
        }

        if (sc->bge_tq)
                taskqueue_drain(sc->bge_tq, &sc->bge_intr_task);

        if (sc->bge_flags & BGE_FLAG_TBI)
                ifmedia_removeall(&sc->bge_ifmedia);
        else if (sc->bge_miibus != NULL) {
                bus_generic_detach(dev);
                device_delete_child(dev, sc->bge_miibus);
        }

        bge_release_resources(sc);

        return (0);
}

static void
bge_release_resources(struct bge_softc *sc)
{
        device_t dev;

        dev = sc->bge_dev;

        if (sc->bge_tq != NULL)
                taskqueue_free(sc->bge_tq);

        if (sc->bge_intrhand != NULL)
                bus_teardown_intr(dev, sc->bge_irq, sc->bge_intrhand);

        if (sc->bge_irq != NULL) {
                bus_release_resource(dev, SYS_RES_IRQ,
                    rman_get_rid(sc->bge_irq), sc->bge_irq);
                pci_release_msi(dev);
        }

        if (sc->bge_res != NULL)
                bus_release_resource(dev, SYS_RES_MEMORY,
                    rman_get_rid(sc->bge_res), sc->bge_res);

        if (sc->bge_res2 != NULL)
                bus_release_resource(dev, SYS_RES_MEMORY,
                    rman_get_rid(sc->bge_res2), sc->bge_res2);

        if (sc->bge_ifp != NULL)
                if_free(sc->bge_ifp);

        bge_dma_free(sc);

        if (mtx_initialized(&sc->bge_mtx))      /* XXX */
                BGE_LOCK_DESTROY(sc);
}

static int
bge_reset(struct bge_softc *sc)
{
        device_t dev;
        uint32_t cachesize, command, mac_mode, mac_mode_mask, reset, val;
        void (*write_op)(struct bge_softc *, int, int);
        uint16_t devctl;
        int i;

        dev = sc->bge_dev;

        mac_mode_mask = BGE_MACMODE_HALF_DUPLEX | BGE_MACMODE_PORTMODE;
        if ((sc->bge_mfw_flags & BGE_MFW_ON_APE) != 0)
                mac_mode_mask |= BGE_MACMODE_APE_RX_EN | BGE_MACMODE_APE_TX_EN;
        mac_mode = CSR_READ_4(sc, BGE_MAC_MODE) & mac_mode_mask;

        if (BGE_IS_575X_PLUS(sc) && !BGE_IS_5714_FAMILY(sc) &&
            (sc->bge_asicrev != BGE_ASICREV_BCM5906)) {
                if (sc->bge_flags & BGE_FLAG_PCIE)
                        write_op = bge_writemem_direct;
                else
                        write_op = bge_writemem_ind;
        } else
                write_op = bge_writereg_ind;

        if (sc->bge_asicrev != BGE_ASICREV_BCM5700 &&
            sc->bge_asicrev != BGE_ASICREV_BCM5701) {
                CSR_WRITE_4(sc, BGE_NVRAM_SWARB, BGE_NVRAMSWARB_SET1);
                for (i = 0; i < 8000; i++) {
                        if (CSR_READ_4(sc, BGE_NVRAM_SWARB) &
                            BGE_NVRAMSWARB_GNT1)
                                break;
                        DELAY(20);
                }
                if (i == 8000) {
                        if (bootverbose)
                                device_printf(dev, "NVRAM lock timedout!\n");
                }
        }
        /* Take APE lock when performing reset. */
        bge_ape_lock(sc, BGE_APE_LOCK_GRC);

        /* Save some important PCI state. */
        cachesize = pci_read_config(dev, BGE_PCI_CACHESZ, 4);
        command = pci_read_config(dev, BGE_PCI_CMD, 4);

        pci_write_config(dev, BGE_PCI_MISC_CTL,
            BGE_PCIMISCCTL_INDIRECT_ACCESS | BGE_PCIMISCCTL_MASK_PCI_INTR |
            BGE_HIF_SWAP_OPTIONS | BGE_PCIMISCCTL_PCISTATE_RW, 4);

        /* Disable fastboot on controllers that support it. */
        if (sc->bge_asicrev == BGE_ASICREV_BCM5752 ||
            BGE_IS_5755_PLUS(sc)) {
                if (bootverbose)
                        device_printf(dev, "Disabling fastboot\n");
                CSR_WRITE_4(sc, BGE_FASTBOOT_PC, 0x0);
        }

        /*
         * Write the magic number to SRAM at offset 0xB50.
         * When firmware finishes its initialization it will
         * write ~BGE_SRAM_FW_MB_MAGIC to the same location.
         */
        bge_writemem_ind(sc, BGE_SRAM_FW_MB, BGE_SRAM_FW_MB_MAGIC);

        reset = BGE_MISCCFG_RESET_CORE_CLOCKS | BGE_32BITTIME_66MHZ;

        /* XXX: Broadcom Linux driver. */
        if (sc->bge_flags & BGE_FLAG_PCIE) {
                if (sc->bge_asicrev != BGE_ASICREV_BCM5785 &&
                    (sc->bge_flags & BGE_FLAG_5717_PLUS) == 0) {
                        if (CSR_READ_4(sc, 0x7E2C) == 0x60)     /* PCIE 1.0 */
                                CSR_WRITE_4(sc, 0x7E2C, 0x20);
                }
                if (sc->bge_chipid != BGE_CHIPID_BCM5750_A0) {
                        /* Prevent PCIE link training during global reset */
                        CSR_WRITE_4(sc, BGE_MISC_CFG, 1 << 29);
                        reset |= 1 << 29;
                }
        }

        if (sc->bge_asicrev == BGE_ASICREV_BCM5906) {
                val = CSR_READ_4(sc, BGE_VCPU_STATUS);
                CSR_WRITE_4(sc, BGE_VCPU_STATUS,
                    val | BGE_VCPU_STATUS_DRV_RESET);
                val = CSR_READ_4(sc, BGE_VCPU_EXT_CTRL);
                CSR_WRITE_4(sc, BGE_VCPU_EXT_CTRL,
                    val & ~BGE_VCPU_EXT_CTRL_HALT_CPU);
        }

        /*
         * Set GPHY Power Down Override to leave GPHY
         * powered up in D0 uninitialized.
         */
        if (BGE_IS_5705_PLUS(sc) &&
            (sc->bge_flags & BGE_FLAG_CPMU_PRESENT) == 0)
                reset |= BGE_MISCCFG_GPHY_PD_OVERRIDE;

        /* Issue global reset */
        write_op(sc, BGE_MISC_CFG, reset);

        if (sc->bge_flags & BGE_FLAG_PCIE)
                DELAY(100 * 1000);
        else
                DELAY(1000);

        /* XXX: Broadcom Linux driver. */
        if (sc->bge_flags & BGE_FLAG_PCIE) {
                if (sc->bge_chipid == BGE_CHIPID_BCM5750_A0) {
                        DELAY(500000); /* wait for link training to complete */
                        val = pci_read_config(dev, 0xC4, 4);
                        pci_write_config(dev, 0xC4, val | (1 << 15), 4);
                }
                devctl = pci_read_config(dev,
                    sc->bge_expcap + PCIER_DEVICE_CTL, 2);
                /* Clear enable no snoop and disable relaxed ordering. */
                devctl &= ~(PCIEM_CTL_RELAXED_ORD_ENABLE |
                    PCIEM_CTL_NOSNOOP_ENABLE);
                pci_write_config(dev, sc->bge_expcap + PCIER_DEVICE_CTL,
                    devctl, 2);
                pci_set_max_read_req(dev, sc->bge_expmrq);
                /* Clear error status. */
                pci_write_config(dev, sc->bge_expcap + PCIER_DEVICE_STA,
                    PCIEM_STA_CORRECTABLE_ERROR |
                    PCIEM_STA_NON_FATAL_ERROR | PCIEM_STA_FATAL_ERROR |
                    PCIEM_STA_UNSUPPORTED_REQ, 2);
        }

        /* Reset some of the PCI state that got zapped by reset. */
        pci_write_config(dev, BGE_PCI_MISC_CTL,
            BGE_PCIMISCCTL_INDIRECT_ACCESS | BGE_PCIMISCCTL_MASK_PCI_INTR |
            BGE_HIF_SWAP_OPTIONS | BGE_PCIMISCCTL_PCISTATE_RW, 4);
        val = BGE_PCISTATE_ROM_ENABLE | BGE_PCISTATE_ROM_RETRY_ENABLE;
        if (sc->bge_chipid == BGE_CHIPID_BCM5704_A0 &&
            (sc->bge_flags & BGE_FLAG_PCIX) != 0)
                val |= BGE_PCISTATE_RETRY_SAME_DMA;
        if ((sc->bge_mfw_flags & BGE_MFW_ON_APE) != 0)
                val |= BGE_PCISTATE_ALLOW_APE_CTLSPC_WR |
                    BGE_PCISTATE_ALLOW_APE_SHMEM_WR |
                    BGE_PCISTATE_ALLOW_APE_PSPACE_WR;
        pci_write_config(dev, BGE_PCI_PCISTATE, val, 4);
        pci_write_config(dev, BGE_PCI_CACHESZ, cachesize, 4);
        pci_write_config(dev, BGE_PCI_CMD, command, 4);
        /*
         * Disable PCI-X relaxed ordering to ensure status block update
         * comes first then packet buffer DMA. Otherwise driver may
         * read stale status block.
         */
        if (sc->bge_flags & BGE_FLAG_PCIX) {
                devctl = pci_read_config(dev,
                    sc->bge_pcixcap + PCIXR_COMMAND, 2);
                devctl &= ~PCIXM_COMMAND_ERO;
                if (sc->bge_asicrev == BGE_ASICREV_BCM5703) {
                        devctl &= ~PCIXM_COMMAND_MAX_READ;
                        devctl |= PCIXM_COMMAND_MAX_READ_2048;
                } else if (sc->bge_asicrev == BGE_ASICREV_BCM5704) {
                        devctl &= ~(PCIXM_COMMAND_MAX_SPLITS |
                            PCIXM_COMMAND_MAX_READ);
                        devctl |= PCIXM_COMMAND_MAX_READ_2048;
                }
                pci_write_config(dev, sc->bge_pcixcap + PCIXR_COMMAND,
                    devctl, 2);
        }
        /* Re-enable MSI, if necessary, and enable the memory arbiter. */
        if (BGE_IS_5714_FAMILY(sc)) {
                /* This chip disables MSI on reset. */
                if (sc->bge_flags & BGE_FLAG_MSI) {
                        val = pci_read_config(dev,
                            sc->bge_msicap + PCIR_MSI_CTRL, 2);
                        pci_write_config(dev,
                            sc->bge_msicap + PCIR_MSI_CTRL,
                            val | PCIM_MSICTRL_MSI_ENABLE, 2);
                        val = CSR_READ_4(sc, BGE_MSI_MODE);
                        CSR_WRITE_4(sc, BGE_MSI_MODE,
                            val | BGE_MSIMODE_ENABLE);
                }
                val = CSR_READ_4(sc, BGE_MARB_MODE);
                CSR_WRITE_4(sc, BGE_MARB_MODE, BGE_MARBMODE_ENABLE | val);
        } else
                CSR_WRITE_4(sc, BGE_MARB_MODE, BGE_MARBMODE_ENABLE);

        /* Fix up byte swapping. */
        CSR_WRITE_4(sc, BGE_MODE_CTL, bge_dma_swap_options(sc));

        val = CSR_READ_4(sc, BGE_MAC_MODE);
        val = (val & ~mac_mode_mask) | mac_mode;
        CSR_WRITE_4(sc, BGE_MAC_MODE, val);
        DELAY(40);

        bge_ape_unlock(sc, BGE_APE_LOCK_GRC);

        if (sc->bge_asicrev == BGE_ASICREV_BCM5906) {
                for (i = 0; i < BGE_TIMEOUT; i++) {
                        val = CSR_READ_4(sc, BGE_VCPU_STATUS);
                        if (val & BGE_VCPU_STATUS_INIT_DONE)
                                break;
                        DELAY(100);
                }
                if (i == BGE_TIMEOUT) {
                        device_printf(dev, "reset timed out\n");
                        return (1);
                }
        } else {
                /*
                 * Poll until we see the 1's complement of the magic number.
                 * This indicates that the firmware initialization is complete.
                 * We expect this to fail if no chip containing the Ethernet
                 * address is fitted though.
                 */
                for (i = 0; i < BGE_TIMEOUT; i++) {
                        DELAY(10);
                        val = bge_readmem_ind(sc, BGE_SRAM_FW_MB);
                        if (val == ~BGE_SRAM_FW_MB_MAGIC)
                                break;
                }

                if ((sc->bge_flags & BGE_FLAG_EADDR) && i == BGE_TIMEOUT)
                        device_printf(dev,
                            "firmware handshake timed out, found 0x%08x\n",
                            val);
                /* BCM57765 A0 needs additional time before accessing. */
                if (sc->bge_chipid == BGE_CHIPID_BCM57765_A0)
                        DELAY(10 * 1000);       /* XXX */
        }

        /*
         * The 5704 in TBI mode apparently needs some special
         * adjustment to insure the SERDES drive level is set
         * to 1.2V.
         */
        if (sc->bge_asicrev == BGE_ASICREV_BCM5704 &&
            sc->bge_flags & BGE_FLAG_TBI) {
                val = CSR_READ_4(sc, BGE_SERDES_CFG);
                val = (val & ~0xFFF) | 0x880;
                CSR_WRITE_4(sc, BGE_SERDES_CFG, val);
        }

        /* XXX: Broadcom Linux driver. */
        if (sc->bge_flags & BGE_FLAG_PCIE &&
            !BGE_IS_5717_PLUS(sc) &&
            sc->bge_chipid != BGE_CHIPID_BCM5750_A0 &&
            sc->bge_asicrev != BGE_ASICREV_BCM5785) {
                /* Enable Data FIFO protection. */
                val = CSR_READ_4(sc, 0x7C00);
                CSR_WRITE_4(sc, 0x7C00, val | (1 << 25));
        }

        if (sc->bge_asicrev == BGE_ASICREV_BCM5720)
                BGE_CLRBIT(sc, BGE_CPMU_CLCK_ORIDE,
                    CPMU_CLCK_ORIDE_MAC_ORIDE_EN);

        return (0);
}

static __inline void
bge_rxreuse_std(struct bge_softc *sc, int i)
{
        struct bge_rx_bd *r;

        r = &sc->bge_ldata.bge_rx_std_ring[sc->bge_std];
        r->bge_flags = BGE_RXBDFLAG_END;
        r->bge_len = sc->bge_cdata.bge_rx_std_seglen[i];
        r->bge_idx = i;
        BGE_INC(sc->bge_std, BGE_STD_RX_RING_CNT);
}

static __inline void
bge_rxreuse_jumbo(struct bge_softc *sc, int i)
{
        struct bge_extrx_bd *r;

        r = &sc->bge_ldata.bge_rx_jumbo_ring[sc->bge_jumbo];
        r->bge_flags = BGE_RXBDFLAG_JUMBO_RING | BGE_RXBDFLAG_END;
        r->bge_len0 = sc->bge_cdata.bge_rx_jumbo_seglen[i][0];
        r->bge_len1 = sc->bge_cdata.bge_rx_jumbo_seglen[i][1];
        r->bge_len2 = sc->bge_cdata.bge_rx_jumbo_seglen[i][2];
        r->bge_len3 = sc->bge_cdata.bge_rx_jumbo_seglen[i][3];
        r->bge_idx = i;
        BGE_INC(sc->bge_jumbo, BGE_JUMBO_RX_RING_CNT);
}

/*
 * Frame reception handling. This is called if there's a frame
 * on the receive return list.
 *
 * Note: we have to be able to handle two possibilities here:
 * 1) the frame is from the jumbo receive ring
 * 2) the frame is from the standard receive ring
 */

static int
bge_rxeof(struct bge_softc *sc, uint16_t rx_prod, int holdlck)
{
        struct ifnet *ifp;
        int rx_npkts = 0, stdcnt = 0, jumbocnt = 0;
        uint16_t rx_cons;

        rx_cons = sc->bge_rx_saved_considx;

        /* Nothing to do. */
        if (rx_cons == rx_prod)
                return (rx_npkts);

        ifp = sc->bge_ifp;

        bus_dmamap_sync(sc->bge_cdata.bge_rx_return_ring_tag,
            sc->bge_cdata.bge_rx_return_ring_map, BUS_DMASYNC_POSTREAD);
        bus_dmamap_sync(sc->bge_cdata.bge_rx_std_ring_tag,
            sc->bge_cdata.bge_rx_std_ring_map, BUS_DMASYNC_POSTWRITE);
        if (BGE_IS_JUMBO_CAPABLE(sc) &&
            ifp->if_mtu + ETHER_HDR_LEN + ETHER_CRC_LEN + ETHER_VLAN_ENCAP_LEN >
            (MCLBYTES - ETHER_ALIGN))
                bus_dmamap_sync(sc->bge_cdata.bge_rx_jumbo_ring_tag,
                    sc->bge_cdata.bge_rx_jumbo_ring_map, BUS_DMASYNC_POSTWRITE);

        while (rx_cons != rx_prod) {
                struct bge_rx_bd        *cur_rx;
                uint32_t                rxidx;
                struct mbuf             *m = NULL;
                uint16_t                vlan_tag = 0;
                int                     have_tag = 0;

#ifdef DEVICE_POLLING
                if (ifp->if_capenable & IFCAP_POLLING) {
                        if (sc->rxcycles <= 0)
                                break;
                        sc->rxcycles--;
                }
#endif

                cur_rx = &sc->bge_ldata.bge_rx_return_ring[rx_cons];

                rxidx = cur_rx->bge_idx;
                BGE_INC(rx_cons, sc->bge_return_ring_cnt);

                if (ifp->if_capenable & IFCAP_VLAN_HWTAGGING &&
                    cur_rx->bge_flags & BGE_RXBDFLAG_VLAN_TAG) {
                        have_tag = 1;
                        vlan_tag = cur_rx->bge_vlan_tag;
                }

                if (cur_rx->bge_flags & BGE_RXBDFLAG_JUMBO_RING) {
                        jumbocnt++;
                        m = sc->bge_cdata.bge_rx_jumbo_chain[rxidx];
                        if (cur_rx->bge_flags & BGE_RXBDFLAG_ERROR) {
                                bge_rxreuse_jumbo(sc, rxidx);
                                continue;
                        }
                        if (bge_newbuf_jumbo(sc, rxidx) != 0) {
                                bge_rxreuse_jumbo(sc, rxidx);
                                ifp->if_iqdrops++;
                                continue;
                        }
                        BGE_INC(sc->bge_jumbo, BGE_JUMBO_RX_RING_CNT);
                } else {
                        stdcnt++;
                        m = sc->bge_cdata.bge_rx_std_chain[rxidx];
                        if (cur_rx->bge_flags & BGE_RXBDFLAG_ERROR) {
                                bge_rxreuse_std(sc, rxidx);
                                continue;
                        }
                        if (bge_newbuf_std(sc, rxidx) != 0) {
                                bge_rxreuse_std(sc, rxidx);
                                ifp->if_iqdrops++;
                                continue;
                        }
                        BGE_INC(sc->bge_std, BGE_STD_RX_RING_CNT);
                }

                ifp->if_ipackets++;
#ifndef __NO_STRICT_ALIGNMENT
                /*
                 * For architectures with strict alignment we must make sure
                 * the payload is aligned.
                 */
                if (sc->bge_flags & BGE_FLAG_RX_ALIGNBUG) {
                        bcopy(m->m_data, m->m_data + ETHER_ALIGN,
                            cur_rx->bge_len);
                        m->m_data += ETHER_ALIGN;
                }
#endif
                m->m_pkthdr.len = m->m_len = cur_rx->bge_len - ETHER_CRC_LEN;
                m->m_pkthdr.rcvif = ifp;

                if (ifp->if_capenable & IFCAP_RXCSUM)
                        bge_rxcsum(sc, cur_rx, m);

                /*
                 * If we received a packet with a vlan tag,
                 * attach that information to the packet.
                 */
                if (have_tag) {
                        m->m_pkthdr.ether_vtag = vlan_tag;
                        m->m_flags |= M_VLANTAG;
                }

                if (holdlck != 0) {
                        BGE_UNLOCK(sc);
                        (*ifp->if_input)(ifp, m);
                        BGE_LOCK(sc);
                } else
                        (*ifp->if_input)(ifp, m);
                rx_npkts++;

                if (!(ifp->if_drv_flags & IFF_DRV_RUNNING))
                        return (rx_npkts);
        }

        bus_dmamap_sync(sc->bge_cdata.bge_rx_return_ring_tag,
            sc->bge_cdata.bge_rx_return_ring_map, BUS_DMASYNC_PREREAD);
        if (stdcnt > 0)
                bus_dmamap_sync(sc->bge_cdata.bge_rx_std_ring_tag,
                    sc->bge_cdata.bge_rx_std_ring_map, BUS_DMASYNC_PREWRITE);

        if (jumbocnt > 0)
                bus_dmamap_sync(sc->bge_cdata.bge_rx_jumbo_ring_tag,
                    sc->bge_cdata.bge_rx_jumbo_ring_map, BUS_DMASYNC_PREWRITE);

        sc->bge_rx_saved_considx = rx_cons;
        bge_writembx(sc, BGE_MBX_RX_CONS0_LO, sc->bge_rx_saved_considx);
        if (stdcnt)
                bge_writembx(sc, BGE_MBX_RX_STD_PROD_LO, (sc->bge_std +
                    BGE_STD_RX_RING_CNT - 1) % BGE_STD_RX_RING_CNT);
        if (jumbocnt)
                bge_writembx(sc, BGE_MBX_RX_JUMBO_PROD_LO, (sc->bge_jumbo +
                    BGE_JUMBO_RX_RING_CNT - 1) % BGE_JUMBO_RX_RING_CNT);
#ifdef notyet
        /*
         * This register wraps very quickly under heavy packet drops.
         * If you need correct statistics, you can enable this check.
         */
        if (BGE_IS_5705_PLUS(sc))
                ifp->if_ierrors += CSR_READ_4(sc, BGE_RXLP_LOCSTAT_IFIN_DROPS);
#endif
        return (rx_npkts);
}

static void
bge_rxcsum(struct bge_softc *sc, struct bge_rx_bd *cur_rx, struct mbuf *m)
{

        if (BGE_IS_5717_PLUS(sc)) {
                if ((cur_rx->bge_flags & BGE_RXBDFLAG_IPV6) == 0) {
                        if (cur_rx->bge_flags & BGE_RXBDFLAG_IP_CSUM) {
                                m->m_pkthdr.csum_flags |= CSUM_IP_CHECKED;
                                if ((cur_rx->bge_error_flag &
                                    BGE_RXERRFLAG_IP_CSUM_NOK) == 0)
                                        m->m_pkthdr.csum_flags |= CSUM_IP_VALID;
                        }
                        if (cur_rx->bge_flags & BGE_RXBDFLAG_TCP_UDP_CSUM) {
                                m->m_pkthdr.csum_data =
                                    cur_rx->bge_tcp_udp_csum;
                                m->m_pkthdr.csum_flags |= CSUM_DATA_VALID |
                                    CSUM_PSEUDO_HDR;
                        }
                }
        } else {
                if (cur_rx->bge_flags & BGE_RXBDFLAG_IP_CSUM) {
                        m->m_pkthdr.csum_flags |= CSUM_IP_CHECKED;
                        if ((cur_rx->bge_ip_csum ^ 0xFFFF) == 0)
                                m->m_pkthdr.csum_flags |= CSUM_IP_VALID;
                }
                if (cur_rx->bge_flags & BGE_RXBDFLAG_TCP_UDP_CSUM &&
                    m->m_pkthdr.len >= ETHER_MIN_NOPAD) {
                        m->m_pkthdr.csum_data =
                            cur_rx->bge_tcp_udp_csum;
                        m->m_pkthdr.csum_flags |= CSUM_DATA_VALID |
                            CSUM_PSEUDO_HDR;
                }
        }
}

static void
bge_txeof(struct bge_softc *sc, uint16_t tx_cons)
{
        struct bge_tx_bd *cur_tx;
        struct ifnet *ifp;

        BGE_LOCK_ASSERT(sc);

        /* Nothing to do. */
        if (sc->bge_tx_saved_considx == tx_cons)
                return;

        ifp = sc->bge_ifp;

        bus_dmamap_sync(sc->bge_cdata.bge_tx_ring_tag,
            sc->bge_cdata.bge_tx_ring_map, BUS_DMASYNC_POSTWRITE);
        /*
         * Go through our tx ring and free mbufs for those
         * frames that have been sent.
         */
        while (sc->bge_tx_saved_considx != tx_cons) {
                uint32_t                idx;

                idx = sc->bge_tx_saved_considx;
                cur_tx = &sc->bge_ldata.bge_tx_ring[idx];
                if (cur_tx->bge_flags & BGE_TXBDFLAG_END)
                        ifp->if_opackets++;
                if (sc->bge_cdata.bge_tx_chain[idx] != NULL) {
                        bus_dmamap_sync(sc->bge_cdata.bge_tx_mtag,
                            sc->bge_cdata.bge_tx_dmamap[idx],
                            BUS_DMASYNC_POSTWRITE);
                        bus_dmamap_unload(sc->bge_cdata.bge_tx_mtag,
                            sc->bge_cdata.bge_tx_dmamap[idx]);
                        m_freem(sc->bge_cdata.bge_tx_chain[idx]);
                        sc->bge_cdata.bge_tx_chain[idx] = NULL;
                }
                sc->bge_txcnt--;
                BGE_INC(sc->bge_tx_saved_considx, BGE_TX_RING_CNT);
        }

        ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
        if (sc->bge_txcnt == 0)
                sc->bge_timer = 0;
}

#ifdef DEVICE_POLLING
static int
bge_poll(struct ifnet *ifp, enum poll_cmd cmd, int count)
{
        struct bge_softc *sc = ifp->if_softc;
        uint16_t rx_prod, tx_cons;
        uint32_t statusword;
        int rx_npkts = 0;

        BGE_LOCK(sc);
        if (!(ifp->if_drv_flags & IFF_DRV_RUNNING)) {
                BGE_UNLOCK(sc);
                return (rx_npkts);
        }

        bus_dmamap_sync(sc->bge_cdata.bge_status_tag,
            sc->bge_cdata.bge_status_map,
            BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE);
        /* Fetch updates from the status block. */
        rx_prod = sc->bge_ldata.bge_status_block->bge_idx[0].bge_rx_prod_idx;
        tx_cons = sc->bge_ldata.bge_status_block->bge_idx[0].bge_tx_cons_idx;

        statusword = sc->bge_ldata.bge_status_block->bge_status;
        /* Clear the status so the next pass only sees the changes. */
        sc->bge_ldata.bge_status_block->bge_status = 0;

        bus_dmamap_sync(sc->bge_cdata.bge_status_tag,
            sc->bge_cdata.bge_status_map,
            BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);

        /* Note link event. It will be processed by POLL_AND_CHECK_STATUS. */
        if (statusword & BGE_STATFLAG_LINKSTATE_CHANGED)
                sc->bge_link_evt++;

        if (cmd == POLL_AND_CHECK_STATUS)
                if ((sc->bge_asicrev == BGE_ASICREV_BCM5700 &&
                    sc->bge_chipid != BGE_CHIPID_BCM5700_B2) ||
                    sc->bge_link_evt || (sc->bge_flags & BGE_FLAG_TBI))
                        bge_link_upd(sc);

        sc->rxcycles = count;
        rx_npkts = bge_rxeof(sc, rx_prod, 1);
        if (!(ifp->if_drv_flags & IFF_DRV_RUNNING)) {
                BGE_UNLOCK(sc);
                return (rx_npkts);
        }
        bge_txeof(sc, tx_cons);
        if (!IFQ_DRV_IS_EMPTY(&ifp->if_snd))
                bge_start_locked(ifp);

        BGE_UNLOCK(sc);
        return (rx_npkts);
}
#endif /* DEVICE_POLLING */

static int
bge_msi_intr(void *arg)
{
        struct bge_softc *sc;

        sc = (struct bge_softc *)arg;
        /*
         * This interrupt is not shared and controller already
         * disabled further interrupt.
         */
        taskqueue_enqueue(sc->bge_tq, &sc->bge_intr_task);
        return (FILTER_HANDLED);
}

static void
bge_intr_task(void *arg, int pending)
{
        struct bge_softc *sc;
        struct ifnet *ifp;
        uint32_t status, status_tag;
        uint16_t rx_prod, tx_cons;

        sc = (struct bge_softc *)arg;
        ifp = sc->bge_ifp;

        BGE_LOCK(sc);
        if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) {
                BGE_UNLOCK(sc);
                return;
        }

        /* Get updated status block. */
        bus_dmamap_sync(sc->bge_cdata.bge_status_tag,
            sc->bge_cdata.bge_status_map,
            BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE);

        /* Save producer/consumer indices. */
        rx_prod = sc->bge_ldata.bge_status_block->bge_idx[0].bge_rx_prod_idx;
        tx_cons = sc->bge_ldata.bge_status_block->bge_idx[0].bge_tx_cons_idx;
        status = sc->bge_ldata.bge_status_block->bge_status;
        status_tag = sc->bge_ldata.bge_status_block->bge_status_tag << 24;
        /* Dirty the status flag. */
        sc->bge_ldata.bge_status_block->bge_status = 0;
        bus_dmamap_sync(sc->bge_cdata.bge_status_tag,
            sc->bge_cdata.bge_status_map,
            BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
        if ((sc->bge_flags & BGE_FLAG_TAGGED_STATUS) == 0)
                status_tag = 0;

        if ((status & BGE_STATFLAG_LINKSTATE_CHANGED) != 0)
                bge_link_upd(sc);

        /* Let controller work. */
        bge_writembx(sc, BGE_MBX_IRQ0_LO, status_tag);

        if (ifp->if_drv_flags & IFF_DRV_RUNNING &&
            sc->bge_rx_saved_considx != rx_prod) {
                /* Check RX return ring producer/consumer. */
                BGE_UNLOCK(sc);
                bge_rxeof(sc, rx_prod, 0);
                BGE_LOCK(sc);
        }
        if (ifp->if_drv_flags & IFF_DRV_RUNNING) {
                /* Check TX ring producer/consumer. */
                bge_txeof(sc, tx_cons);
                if (!IFQ_DRV_IS_EMPTY(&ifp->if_snd))
                        bge_start_locked(ifp);
        }
        BGE_UNLOCK(sc);
}

static void
bge_intr(void *xsc)
{
        struct bge_softc *sc;
        struct ifnet *ifp;
        uint32_t statusword;
        uint16_t rx_prod, tx_cons;

        sc = xsc;

        BGE_LOCK(sc);

        ifp = sc->bge_ifp;

#ifdef DEVICE_POLLING
        if (ifp->if_capenable & IFCAP_POLLING) {
                BGE_UNLOCK(sc);
                return;
        }
#endif

        /*
         * Ack the interrupt by writing something to BGE_MBX_IRQ0_LO.  Don't
         * disable interrupts by writing nonzero like we used to, since with
         * our current organization this just gives complications and
         * pessimizations for re-enabling interrupts.  We used to have races
         * instead of the necessary complications.  Disabling interrupts
         * would just reduce the chance of a status update while we are
         * running (by switching to the interrupt-mode coalescence
         * parameters), but this chance is already very low so it is more
         * efficient to get another interrupt than prevent it.
         *
         * We do the ack first to ensure another interrupt if there is a
         * status update after the ack.  We don't check for the status
         * changing later because it is more efficient to get another
         * interrupt than prevent it, not quite as above (not checking is
         * a smaller optimization than not toggling the interrupt enable,
         * since checking doesn't involve PCI accesses and toggling require
         * the status check).  So toggling would probably be a pessimization
         * even with MSI.  It would only be needed for using a task queue.
         */
        bge_writembx(sc, BGE_MBX_IRQ0_LO, 0);

        /*
         * Do the mandatory PCI flush as well as get the link status.
         */
        statusword = CSR_READ_4(sc, BGE_MAC_STS) & BGE_MACSTAT_LINK_CHANGED;

        /* Make sure the descriptor ring indexes are coherent. */
        bus_dmamap_sync(sc->bge_cdata.bge_status_tag,
            sc->bge_cdata.bge_status_map,
            BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE);
        rx_prod = sc->bge_ldata.bge_status_block->bge_idx[0].bge_rx_prod_idx;
        tx_cons = sc->bge_ldata.bge_status_block->bge_idx[0].bge_tx_cons_idx;
        sc->bge_ldata.bge_status_block->bge_status = 0;
        bus_dmamap_sync(sc->bge_cdata.bge_status_tag,
            sc->bge_cdata.bge_status_map,
            BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);

        if ((sc->bge_asicrev == BGE_ASICREV_BCM5700 &&
            sc->bge_chipid != BGE_CHIPID_BCM5700_B2) ||
            statusword || sc->bge_link_evt)
                bge_link_upd(sc);

        if (ifp->if_drv_flags & IFF_DRV_RUNNING) {
                /* Check RX return ring producer/consumer. */
                bge_rxeof(sc, rx_prod, 1);
        }

        if (ifp->if_drv_flags & IFF_DRV_RUNNING) {
                /* Check TX ring producer/consumer. */
                bge_txeof(sc, tx_cons);
        }

        if (ifp->if_drv_flags & IFF_DRV_RUNNING &&
            !IFQ_DRV_IS_EMPTY(&ifp->if_snd))
                bge_start_locked(ifp);

        BGE_UNLOCK(sc);
}

static void
bge_asf_driver_up(struct bge_softc *sc)
{
        if (sc->bge_asf_mode & ASF_STACKUP) {
                /* Send ASF heartbeat aprox. every 2s */
                if (sc->bge_asf_count)
                        sc->bge_asf_count --;
                else {
                        sc->bge_asf_count = 2;
                        bge_writemem_ind(sc, BGE_SRAM_FW_CMD_MB,
                            BGE_FW_CMD_DRV_ALIVE);
                        bge_writemem_ind(sc, BGE_SRAM_FW_CMD_LEN_MB, 4);
                        bge_writemem_ind(sc, BGE_SRAM_FW_CMD_DATA_MB,
                            BGE_FW_HB_TIMEOUT_SEC);
                        CSR_WRITE_4(sc, BGE_RX_CPU_EVENT,
                            CSR_READ_4(sc, BGE_RX_CPU_EVENT) |
                            BGE_RX_CPU_DRV_EVENT);
                }
        }
}

static void
bge_tick(void *xsc)
{
        struct bge_softc *sc = xsc;
        struct mii_data *mii = NULL;

        BGE_LOCK_ASSERT(sc);

        /* Synchronize with possible callout reset/stop. */
        if (callout_pending(&sc->bge_stat_ch) ||
            !callout_active(&sc->bge_stat_ch))
                return;

        if (BGE_IS_5705_PLUS(sc))
                bge_stats_update_regs(sc);
        else
                bge_stats_update(sc);

        /* XXX Add APE heartbeat check here? */

        if ((sc->bge_flags & BGE_FLAG_TBI) == 0) {
                mii = device_get_softc(sc->bge_miibus);
                /*
                 * Do not touch PHY if we have link up. This could break
                 * IPMI/ASF mode or produce extra input errors
                 * (extra errors was reported for bcm5701 & bcm5704).
                 */
                if (!sc->bge_link)
                        mii_tick(mii);
        } else {
                /*
                 * Since in TBI mode auto-polling can't be used we should poll
                 * link status manually. Here we register pending link event
                 * and trigger interrupt.
                 */
#ifdef DEVICE_POLLING
                /* In polling mode we poll link state in bge_poll(). */
                if (!(sc->bge_ifp->if_capenable & IFCAP_POLLING))
#endif
                {
                sc->bge_link_evt++;
                if (sc->bge_asicrev == BGE_ASICREV_BCM5700 ||
                    sc->bge_flags & BGE_FLAG_5788)
                        BGE_SETBIT(sc, BGE_MISC_LOCAL_CTL, BGE_MLC_INTR_SET);
                else
                        BGE_SETBIT(sc, BGE_HCC_MODE, BGE_HCCMODE_COAL_NOW);
                }
        }

        bge_asf_driver_up(sc);
        bge_watchdog(sc);

        callout_reset(&sc->bge_stat_ch, hz, bge_tick, sc);
}

static void
bge_stats_update_regs(struct bge_softc *sc)
{
        struct ifnet *ifp;
        struct bge_mac_stats *stats;
        uint32_t val;

        ifp = sc->bge_ifp;
        stats = &sc->bge_mac_stats;

        stats->ifHCOutOctets +=
            CSR_READ_4(sc, BGE_TX_MAC_STATS_OCTETS);
        stats->etherStatsCollisions +=
            CSR_READ_4(sc, BGE_TX_MAC_STATS_COLLS);
        stats->outXonSent +=
            CSR_READ_4(sc, BGE_TX_MAC_STATS_XON_SENT);
        stats->outXoffSent +=
            CSR_READ_4(sc, BGE_TX_MAC_STATS_XOFF_SENT);
        stats->dot3StatsInternalMacTransmitErrors +=
            CSR_READ_4(sc, BGE_TX_MAC_STATS_ERRORS);
        stats->dot3StatsSingleCollisionFrames +=
            CSR_READ_4(sc, BGE_TX_MAC_STATS_SINGLE_COLL);
        stats->dot3StatsMultipleCollisionFrames +=
            CSR_READ_4(sc, BGE_TX_MAC_STATS_MULTI_COLL);
        stats->dot3StatsDeferredTransmissions +=
            CSR_READ_4(sc, BGE_TX_MAC_STATS_DEFERRED);
        stats->dot3StatsExcessiveCollisions +=
            CSR_READ_4(sc, BGE_TX_MAC_STATS_EXCESS_COLL);
        stats->dot3StatsLateCollisions +=
            CSR_READ_4(sc, BGE_TX_MAC_STATS_LATE_COLL);
        stats->ifHCOutUcastPkts +=
            CSR_READ_4(sc, BGE_TX_MAC_STATS_UCAST);
        stats->ifHCOutMulticastPkts +=
            CSR_READ_4(sc, BGE_TX_MAC_STATS_MCAST);
        stats->ifHCOutBroadcastPkts +=
            CSR_READ_4(sc, BGE_TX_MAC_STATS_BCAST);

        stats->ifHCInOctets +=
            CSR_READ_4(sc, BGE_RX_MAC_STATS_OCTESTS);
        stats->etherStatsFragments +=
            CSR_READ_4(sc, BGE_RX_MAC_STATS_FRAGMENTS);
        stats->ifHCInUcastPkts +=
            CSR_READ_4(sc, BGE_RX_MAC_STATS_UCAST);
        stats->ifHCInMulticastPkts +=
            CSR_READ_4(sc, BGE_RX_MAC_STATS_MCAST);
        stats->ifHCInBroadcastPkts +=
            CSR_READ_4(sc, BGE_RX_MAC_STATS_BCAST);
        stats->dot3StatsFCSErrors +=
            CSR_READ_4(sc, BGE_RX_MAC_STATS_FCS_ERRORS);
        stats->dot3StatsAlignmentErrors +=
            CSR_READ_4(sc, BGE_RX_MAC_STATS_ALGIN_ERRORS);
        stats->xonPauseFramesReceived +=
            CSR_READ_4(sc, BGE_RX_MAC_STATS_XON_RCVD);
        stats->xoffPauseFramesReceived +=
            CSR_READ_4(sc, BGE_RX_MAC_STATS_XOFF_RCVD);
        stats->macControlFramesReceived +=
            CSR_READ_4(sc, BGE_RX_MAC_STATS_CTRL_RCVD);
        stats->xoffStateEntered +=
            CSR_READ_4(sc, BGE_RX_MAC_STATS_XOFF_ENTERED);
        stats->dot3StatsFramesTooLong +=
            CSR_READ_4(sc, BGE_RX_MAC_STATS_FRAME_TOO_LONG);
        stats->etherStatsJabbers +=
            CSR_READ_4(sc, BGE_RX_MAC_STATS_JABBERS);
        stats->etherStatsUndersizePkts +=
            CSR_READ_4(sc, BGE_RX_MAC_STATS_UNDERSIZE);

        stats->FramesDroppedDueToFilters +=
            CSR_READ_4(sc, BGE_RXLP_LOCSTAT_FILTDROP);
        stats->DmaWriteQueueFull +=
            CSR_READ_4(sc, BGE_RXLP_LOCSTAT_DMA_WRQ_FULL);
        stats->DmaWriteHighPriQueueFull +=
            CSR_READ_4(sc, BGE_RXLP_LOCSTAT_DMA_HPWRQ_FULL);
        stats->NoMoreRxBDs +=
            CSR_READ_4(sc, BGE_RXLP_LOCSTAT_OUT_OF_BDS);
        /*
         * XXX
         * Unlike other controllers, BGE_RXLP_LOCSTAT_IFIN_DROPS
         * counter of BCM5717, BCM5718, BCM5719 A0 and BCM5720 A0
         * includes number of unwanted multicast frames.  This comes
         * from silicon bug and known workaround to get rough(not
         * exact) counter is to enable interrupt on MBUF low water
         * attention.  This can be accomplished by setting
         * BGE_HCCMODE_ATTN bit of BGE_HCC_MODE,
         * BGE_BMANMODE_LOMBUF_ATTN bit of BGE_BMAN_MODE and
         * BGE_MODECTL_FLOWCTL_ATTN_INTR bit of BGE_MODE_CTL.
         * However that change would generate more interrupts and
         * there are still possibilities of losing multiple frames
         * during BGE_MODECTL_FLOWCTL_ATTN_INTR interrupt handling.
         * Given that the workaround still would not get correct
         * counter I don't think it's worth to implement it.  So
         * ignore reading the counter on controllers that have the
         * silicon bug.
         */
        if (sc->bge_asicrev != BGE_ASICREV_BCM5717 &&
            sc->bge_chipid != BGE_CHIPID_BCM5719_A0 &&
            sc->bge_chipid != BGE_CHIPID_BCM5720_A0)
                stats->InputDiscards +=
                    CSR_READ_4(sc, BGE_RXLP_LOCSTAT_IFIN_DROPS);
        stats->InputErrors +=
            CSR_READ_4(sc, BGE_RXLP_LOCSTAT_IFIN_ERRORS);
        stats->RecvThresholdHit +=
            CSR_READ_4(sc, BGE_RXLP_LOCSTAT_RXTHRESH_HIT);

        ifp->if_collisions = (u_long)stats->etherStatsCollisions;
        ifp->if_ierrors = (u_long)(stats->NoMoreRxBDs + stats->InputDiscards +
            stats->InputErrors);

        if (sc->bge_flags & BGE_FLAG_RDMA_BUG) {
                /*
                 * If controller transmitted more than BGE_NUM_RDMA_CHANNELS
                 * frames, it's safe to disable workaround for DMA engine's
                 * miscalculation of TXMBUF space.
                 */
                if (stats->ifHCOutUcastPkts + stats->ifHCOutMulticastPkts +
                    stats->ifHCOutBroadcastPkts > BGE_NUM_RDMA_CHANNELS) {
                        val = CSR_READ_4(sc, BGE_RDMA_LSO_CRPTEN_CTRL);
                        if (sc->bge_asicrev == BGE_ASICREV_BCM5719)
                                val &= ~BGE_RDMA_TX_LENGTH_WA_5719;
                        else
                                val &= ~BGE_RDMA_TX_LENGTH_WA_5720;
                        CSR_WRITE_4(sc, BGE_RDMA_LSO_CRPTEN_CTRL, val);
                        sc->bge_flags &= ~BGE_FLAG_RDMA_BUG;
                }
        }
}

static void
bge_stats_clear_regs(struct bge_softc *sc)
{

        CSR_READ_4(sc, BGE_TX_MAC_STATS_OCTETS);
        CSR_READ_4(sc, BGE_TX_MAC_STATS_COLLS);
        CSR_READ_4(sc, BGE_TX_MAC_STATS_XON_SENT);
        CSR_READ_4(sc, BGE_TX_MAC_STATS_XOFF_SENT);
        CSR_READ_4(sc, BGE_TX_MAC_STATS_ERRORS);
        CSR_READ_4(sc, BGE_TX_MAC_STATS_SINGLE_COLL);
        CSR_READ_4(sc, BGE_TX_MAC_STATS_MULTI_COLL);
        CSR_READ_4(sc, BGE_TX_MAC_STATS_DEFERRED);
        CSR_READ_4(sc, BGE_TX_MAC_STATS_EXCESS_COLL);
        CSR_READ_4(sc, BGE_TX_MAC_STATS_LATE_COLL);
        CSR_READ_4(sc, BGE_TX_MAC_STATS_UCAST);
        CSR_READ_4(sc, BGE_TX_MAC_STATS_MCAST);
        CSR_READ_4(sc, BGE_TX_MAC_STATS_BCAST);

        CSR_READ_4(sc, BGE_RX_MAC_STATS_OCTESTS);
        CSR_READ_4(sc, BGE_RX_MAC_STATS_FRAGMENTS);
        CSR_READ_4(sc, BGE_RX_MAC_STATS_UCAST);
        CSR_READ_4(sc, BGE_RX_MAC_STATS_MCAST);
        CSR_READ_4(sc, BGE_RX_MAC_STATS_BCAST);
        CSR_READ_4(sc, BGE_RX_MAC_STATS_FCS_ERRORS);
        CSR_READ_4(sc, BGE_RX_MAC_STATS_ALGIN_ERRORS);
        CSR_READ_4(sc, BGE_RX_MAC_STATS_XON_RCVD);
        CSR_READ_4(sc, BGE_RX_MAC_STATS_XOFF_RCVD);
        CSR_READ_4(sc, BGE_RX_MAC_STATS_CTRL_RCVD);
        CSR_READ_4(sc, BGE_RX_MAC_STATS_XOFF_ENTERED);
        CSR_READ_4(sc, BGE_RX_MAC_STATS_FRAME_TOO_LONG);
        CSR_READ_4(sc, BGE_RX_MAC_STATS_JABBERS);
        CSR_READ_4(sc, BGE_RX_MAC_STATS_UNDERSIZE);

        CSR_READ_4(sc, BGE_RXLP_LOCSTAT_FILTDROP);
        CSR_READ_4(sc, BGE_RXLP_LOCSTAT_DMA_WRQ_FULL);
        CSR_READ_4(sc, BGE_RXLP_LOCSTAT_DMA_HPWRQ_FULL);
        CSR_READ_4(sc, BGE_RXLP_LOCSTAT_OUT_OF_BDS);
        CSR_READ_4(sc, BGE_RXLP_LOCSTAT_IFIN_DROPS);
        CSR_READ_4(sc, BGE_RXLP_LOCSTAT_IFIN_ERRORS);
        CSR_READ_4(sc, BGE_RXLP_LOCSTAT_RXTHRESH_HIT);
}

static void
bge_stats_update(struct bge_softc *sc)
{
        struct ifnet *ifp;
        bus_size_t stats;
        uint32_t cnt;   /* current register value */

        ifp = sc->bge_ifp;

        stats = BGE_MEMWIN_START + BGE_STATS_BLOCK;

#define READ_STAT(sc, stats, stat) \
        CSR_READ_4(sc, stats + offsetof(struct bge_stats, stat))

        cnt = READ_STAT(sc, stats, txstats.etherStatsCollisions.bge_addr_lo);
        ifp->if_collisions += (uint32_t)(cnt - sc->bge_tx_collisions);
        sc->bge_tx_collisions = cnt;

        cnt = READ_STAT(sc, stats, nicNoMoreRxBDs.bge_addr_lo);
        ifp->if_ierrors += (uint32_t)(cnt - sc->bge_rx_nobds);
        sc->bge_rx_nobds = cnt;
        cnt = READ_STAT(sc, stats, ifInErrors.bge_addr_lo);
        ifp->if_ierrors += (uint32_t)(cnt - sc->bge_rx_inerrs);
        sc->bge_rx_inerrs = cnt;
        cnt = READ_STAT(sc, stats, ifInDiscards.bge_addr_lo);
        ifp->if_ierrors += (uint32_t)(cnt - sc->bge_rx_discards);
        sc->bge_rx_discards = cnt;

        cnt = READ_STAT(sc, stats, txstats.ifOutDiscards.bge_addr_lo);
        ifp->if_oerrors += (uint32_t)(cnt - sc->bge_tx_discards);
        sc->bge_tx_discards = cnt;

#undef  READ_STAT
}

/*
 * Pad outbound frame to ETHER_MIN_NOPAD for an unusual reason.
 * The bge hardware will pad out Tx runts to ETHER_MIN_NOPAD,
 * but when such padded frames employ the bge IP/TCP checksum offload,
 * the hardware checksum assist gives incorrect results (possibly
 * from incorporating its own padding into the UDP/TCP checksum; who knows).
 * If we pad such runts with zeros, the onboard checksum comes out correct.
 */
static __inline int
bge_cksum_pad(struct mbuf *m)
{
        int padlen = ETHER_MIN_NOPAD - m->m_pkthdr.len;
        struct mbuf *last;

        /* If there's only the packet-header and we can pad there, use it. */
        if (m->m_pkthdr.len == m->m_len && M_WRITABLE(m) &&
            M_TRAILINGSPACE(m) >= padlen) {
                last = m;
        } else {
                /*
                 * Walk packet chain to find last mbuf. We will either
                 * pad there, or append a new mbuf and pad it.
                 */
                for (last = m; last->m_next != NULL; last = last->m_next);
                if (!(M_WRITABLE(last) && M_TRAILINGSPACE(last) >= padlen)) {
                        /* Allocate new empty mbuf, pad it. Compact later. */
                        struct mbuf *n;

                        MGET(n, M_NOWAIT, MT_DATA);
                        if (n == NULL)
                                return (ENOBUFS);
                        n->m_len = 0;
                        last->m_next = n;
                        last = n;
                }
        }

        /* Now zero the pad area, to avoid the bge cksum-assist bug. */
        memset(mtod(last, caddr_t) + last->m_len, 0, padlen);
        last->m_len += padlen;
        m->m_pkthdr.len += padlen;

        return (0);
}

static struct mbuf *
bge_check_short_dma(struct mbuf *m)
{
        struct mbuf *n;
        int found;

        /*
         * If device receive two back-to-back send BDs with less than
         * or equal to 8 total bytes then the device may hang.  The two
         * back-to-back send BDs must in the same frame for this failure
         * to occur.  Scan mbuf chains and see whether two back-to-back
         * send BDs are there. If this is the case, allocate new mbuf
         * and copy the frame to workaround the silicon bug.
         */
        for (n = m, found = 0; n != NULL; n = n->m_next) {
                if (n->m_len < 8) {
                        found++;
                        if (found > 1)
                                break;
                        continue;
                }
                found = 0;
        }

        if (found > 1) {
                n = m_defrag(m, M_NOWAIT);
                if (n == NULL)
                        m_freem(m);
        } else
                n = m;
        return (n);
}

static struct mbuf *
bge_setup_tso(struct bge_softc *sc, struct mbuf *m, uint16_t *mss,
    uint16_t *flags)
{
        struct ip *ip;
        struct tcphdr *tcp;
        struct mbuf *n;
        uint16_t hlen;
        uint32_t poff;

        if (M_WRITABLE(m) == 0) {
                /* Get a writable copy. */
                n = m_dup(m, M_NOWAIT);
                m_freem(m);
                if (n == NULL)
                        return (NULL);
                m = n;
        }
        m = m_pullup(m, sizeof(struct ether_header) + sizeof(struct ip));
        if (m == NULL)
                return (NULL);
        ip = (struct ip *)(mtod(m, char *) + sizeof(struct ether_header));
        poff = sizeof(struct ether_header) + (ip->ip_hl << 2);
        m = m_pullup(m, poff + sizeof(struct tcphdr));
        if (m == NULL)
                return (NULL);
        tcp = (struct tcphdr *)(mtod(m, char *) + poff);
        m = m_pullup(m, poff + (tcp->th_off << 2));
        if (m == NULL)
                return (NULL);
        /*
         * It seems controller doesn't modify IP length and TCP pseudo
         * checksum. These checksum computed by upper stack should be 0.
         */
        *mss = m->m_pkthdr.tso_segsz;
        ip = (struct ip *)(mtod(m, char *) + sizeof(struct ether_header));
        ip->ip_sum = 0;
        ip->ip_len = htons(*mss + (ip->ip_hl << 2) + (tcp->th_off << 2));
        /* Clear pseudo checksum computed by TCP stack. */
        tcp = (struct tcphdr *)(mtod(m, char *) + poff);
        tcp->th_sum = 0;
        /*
         * Broadcom controllers uses different descriptor format for
         * TSO depending on ASIC revision. Due to TSO-capable firmware
         * license issue and lower performance of firmware based TSO
         * we only support hardware based TSO.
         */
        /* Calculate header length, incl. TCP/IP options, in 32 bit units. */
        hlen = ((ip->ip_hl << 2) + (tcp->th_off << 2)) >> 2;
        if (sc->bge_flags & BGE_FLAG_TSO3) {
                /*
                 * For BCM5717 and newer controllers, hardware based TSO
                 * uses the 14 lower bits of the bge_mss field to store the
                 * MSS and the upper 2 bits to store the lowest 2 bits of
                 * the IP/TCP header length.  The upper 6 bits of the header
                 * length are stored in the bge_flags[14:10,4] field.  Jumbo
                 * frames are supported.
                 */
                *mss |= ((hlen & 0x3) << 14);
                *flags |= ((hlen & 0xF8) << 7) | ((hlen & 0x4) << 2);
        } else {
                /*
                 * For BCM5755 and newer controllers, hardware based TSO uses
                 * the lower 11 bits to store the MSS and the upper 5 bits to
                 * store the IP/TCP header length. Jumbo frames are not
                 * supported.
                 */
                *mss |= (hlen << 11);
        }
        return (m);
}

/*
 * Encapsulate an mbuf chain in the tx ring  by coupling the mbuf data
 * pointers to descriptors.
 */
static int
bge_encap(struct bge_softc *sc, struct mbuf **m_head, uint32_t *txidx)
{
        bus_dma_segment_t       segs[BGE_NSEG_NEW];
        bus_dmamap_t            map;
        struct bge_tx_bd        *d;
        struct mbuf             *m = *m_head;
        uint32_t                idx = *txidx;
        uint16_t                csum_flags, mss, vlan_tag;
        int                     nsegs, i, error;

        csum_flags = 0;
        mss = 0;
        vlan_tag = 0;
        if ((sc->bge_flags & BGE_FLAG_SHORT_DMA_BUG) != 0 &&
            m->m_next != NULL) {
                *m_head = bge_check_short_dma(m);
                if (*m_head == NULL)
                        return (ENOBUFS);
                m = *m_head;
        }
        if ((m->m_pkthdr.csum_flags & CSUM_TSO) != 0) {
                *m_head = m = bge_setup_tso(sc, m, &mss, &csum_flags);
                if (*m_head == NULL)
                        return (ENOBUFS);
                csum_flags |= BGE_TXBDFLAG_CPU_PRE_DMA |
                    BGE_TXBDFLAG_CPU_POST_DMA;
        } else if ((m->m_pkthdr.csum_flags & sc->bge_csum_features) != 0) {
                if (m->m_pkthdr.csum_flags & CSUM_IP)
                        csum_flags |= BGE_TXBDFLAG_IP_CSUM;
                if (m->m_pkthdr.csum_flags & (CSUM_TCP | CSUM_UDP)) {
                        csum_flags |= BGE_TXBDFLAG_TCP_UDP_CSUM;
                        if (m->m_pkthdr.len < ETHER_MIN_NOPAD &&
                            (error = bge_cksum_pad(m)) != 0) {
                                m_freem(m);
                                *m_head = NULL;
                                return (error);
                        }
                }
        }

        if ((m->m_pkthdr.csum_flags & CSUM_TSO) == 0) {
                if (sc->bge_flags & BGE_FLAG_JUMBO_FRAME &&
                    m->m_pkthdr.len > ETHER_MAX_LEN)
                        csum_flags |= BGE_TXBDFLAG_JUMBO_FRAME;
                if (sc->bge_forced_collapse > 0 &&
                    (sc->bge_flags & BGE_FLAG_PCIE) != 0 && m->m_next != NULL) {
                        /*
                         * Forcedly collapse mbuf chains to overcome hardware
                         * limitation which only support a single outstanding
                         * DMA read operation.
                         */
                        if (sc->bge_forced_collapse == 1)
                                m = m_defrag(m, M_NOWAIT);
                        else
                                m = m_collapse(m, M_NOWAIT,
                                    sc->bge_forced_collapse);
                        if (m == NULL)
                                m = *m_head;
                        *m_head = m;
                }
        }

        map = sc->bge_cdata.bge_tx_dmamap[idx];
        error = bus_dmamap_load_mbuf_sg(sc->bge_cdata.bge_tx_mtag, map, m, segs,
            &nsegs, BUS_DMA_NOWAIT);
        if (error == EFBIG) {
                m = m_collapse(m, M_NOWAIT, BGE_NSEG_NEW);
                if (m == NULL) {
                        m_freem(*m_head);
                        *m_head = NULL;
                        return (ENOBUFS);
                }
                *m_head = m;
                error = bus_dmamap_load_mbuf_sg(sc->bge_cdata.bge_tx_mtag, map,
                    m, segs, &nsegs, BUS_DMA_NOWAIT);
                if (error) {
                        m_freem(m);
                        *m_head = NULL;
                        return (error);
                }
        } else if (error != 0)
                return (error);

        /* Check if we have enough free send BDs. */
        if (sc->bge_txcnt + nsegs >= BGE_TX_RING_CNT) {
                bus_dmamap_unload(sc->bge_cdata.bge_tx_mtag, map);
                return (ENOBUFS);
        }

        bus_dmamap_sync(sc->bge_cdata.bge_tx_mtag, map, BUS_DMASYNC_PREWRITE);

        if (m->m_flags & M_VLANTAG) {
                csum_flags |= BGE_TXBDFLAG_VLAN_TAG;
                vlan_tag = m->m_pkthdr.ether_vtag;
        }

        if (sc->bge_asicrev == BGE_ASICREV_BCM5762 &&
            (m->m_pkthdr.csum_flags & CSUM_TSO) != 0) {
                /*
                 * 5725 family of devices corrupts TSO packets when TSO DMA
                 * buffers cross into regions which are within MSS bytes of
                 * a 4GB boundary.  If we encounter the condition, drop the
                 * packet.
                 */
                for (i = 0; ; i++) {
                        d = &sc->bge_ldata.bge_tx_ring[idx];
                        d->bge_addr.bge_addr_lo = BGE_ADDR_LO(segs[i].ds_addr);
                        d->bge_addr.bge_addr_hi = BGE_ADDR_HI(segs[i].ds_addr);
                        d->bge_len = segs[i].ds_len;
                        if (d->bge_addr.bge_addr_lo + segs[i].ds_len + mss <
                            d->bge_addr.bge_addr_lo)
                                break;
                        d->bge_flags = csum_flags;
                        d->bge_vlan_tag = vlan_tag;
                        d->bge_mss = mss;
                        if (i == nsegs - 1)
                                break;
                        BGE_INC(idx, BGE_TX_RING_CNT);
                }
                if (i != nsegs - 1) {
                        bus_dmamap_sync(sc->bge_cdata.bge_tx_mtag, map,
                            BUS_DMASYNC_POSTWRITE);
                        bus_dmamap_unload(sc->bge_cdata.bge_tx_mtag, map);
                        m_freem(*m_head);
                        *m_head = NULL;
                        return (EIO);
                }
        } else {
                for (i = 0; ; i++) {
                        d = &sc->bge_ldata.bge_tx_ring[idx];
                        d->bge_addr.bge_addr_lo = BGE_ADDR_LO(segs[i].ds_addr);
                        d->bge_addr.bge_addr_hi = BGE_ADDR_HI(segs[i].ds_addr);
                        d->bge_len = segs[i].ds_len;
                        d->bge_flags = csum_flags;
                        d->bge_vlan_tag = vlan_tag;
                        d->bge_mss = mss;
                        if (i == nsegs - 1)
                                break;
                        BGE_INC(idx, BGE_TX_RING_CNT);
                }
        }

        /* Mark the last segment as end of packet... */
        d->bge_flags |= BGE_TXBDFLAG_END;

        /*
         * Insure that the map for this transmission
         * is placed at the array index of the last descriptor
         * in this chain.
         */
        sc->bge_cdata.bge_tx_dmamap[*txidx] = sc->bge_cdata.bge_tx_dmamap[idx];
        sc->bge_cdata.bge_tx_dmamap[idx] = map;
        sc->bge_cdata.bge_tx_chain[idx] = m;
        sc->bge_txcnt += nsegs;

        BGE_INC(idx, BGE_TX_RING_CNT);
        *txidx = idx;

        return (0);
}

/*
 * Main transmit routine. To avoid having to do mbuf copies, we put pointers
 * to the mbuf data regions directly in the transmit descriptors.
 */
static void
bge_start_locked(struct ifnet *ifp)
{
        struct bge_softc *sc;
        struct mbuf *m_head;
        uint32_t prodidx;
        int count;

        sc = ifp->if_softc;
        BGE_LOCK_ASSERT(sc);

        if (!sc->bge_link ||
            (ifp->if_drv_flags & (IFF_DRV_RUNNING | IFF_DRV_OACTIVE)) !=
            IFF_DRV_RUNNING)
                return;

        prodidx = sc->bge_tx_prodidx;

        for (count = 0; !IFQ_DRV_IS_EMPTY(&ifp->if_snd);) {
                if (sc->bge_txcnt > BGE_TX_RING_CNT - 16) {
                        ifp->if_drv_flags |= IFF_DRV_OACTIVE;
                        break;
                }
                IFQ_DRV_DEQUEUE(&ifp->if_snd, m_head);
                if (m_head == NULL)
                        break;

                /*
                 * Pack the data into the transmit ring. If we
                 * don't have room, set the OACTIVE flag and wait
                 * for the NIC to drain the ring.
                 */
                if (bge_encap(sc, &m_head, &prodidx)) {
                        if (m_head == NULL)
                                break;
                        IFQ_DRV_PREPEND(&ifp->if_snd, m_head);
                        ifp->if_drv_flags |= IFF_DRV_OACTIVE;
                        break;
                }
                ++count;

                /*
                 * If there's a BPF listener, bounce a copy of this frame
                 * to him.
                 */
#ifdef ETHER_BPF_MTAP
                ETHER_BPF_MTAP(ifp, m_head);
#else
                BPF_MTAP(ifp, m_head);
#endif
        }

        if (count > 0) {
                bus_dmamap_sync(sc->bge_cdata.bge_tx_ring_tag,
                    sc->bge_cdata.bge_tx_ring_map, BUS_DMASYNC_PREWRITE);
                /* Transmit. */
                bge_writembx(sc, BGE_MBX_TX_HOST_PROD0_LO, prodidx);
                /* 5700 b2 errata */
                if (sc->bge_chiprev == BGE_CHIPREV_5700_BX)
                        bge_writembx(sc, BGE_MBX_TX_HOST_PROD0_LO, prodidx);

                sc->bge_tx_prodidx = prodidx;

                /*
                 * Set a timeout in case the chip goes out to lunch.
                 */
                sc->bge_timer = BGE_TX_TIMEOUT;
        }
}

/*
 * Main transmit routine. To avoid having to do mbuf copies, we put pointers
 * to the mbuf data regions directly in the transmit descriptors.
 */
static void
bge_start(struct ifnet *ifp)
{
        struct bge_softc *sc;

        sc = ifp->if_softc;
        BGE_LOCK(sc);
        bge_start_locked(ifp);
        BGE_UNLOCK(sc);
}

static void
bge_init_locked(struct bge_softc *sc)
{
        struct ifnet *ifp;
        uint16_t *m;
        uint32_t mode;

        BGE_LOCK_ASSERT(sc);

        ifp = sc->bge_ifp;

        if (ifp->if_drv_flags & IFF_DRV_RUNNING)
                return;

        /* Cancel pending I/O and flush buffers. */
        bge_stop(sc);

        bge_stop_fw(sc);
        bge_sig_pre_reset(sc, BGE_RESET_START);
        bge_reset(sc);
        bge_sig_legacy(sc, BGE_RESET_START);
        bge_sig_post_reset(sc, BGE_RESET_START);

        bge_chipinit(sc);

        /*
         * Init the various state machines, ring
         * control blocks and firmware.
         */
        if (bge_blockinit(sc)) {
                device_printf(sc->bge_dev, "initialization failure\n");
                return;
        }

        ifp = sc->bge_ifp;

        /* Specify MTU. */
        CSR_WRITE_4(sc, BGE_RX_MTU, ifp->if_mtu +
            ETHER_HDR_LEN + ETHER_CRC_LEN +
            (ifp->if_capenable & IFCAP_VLAN_MTU ? ETHER_VLAN_ENCAP_LEN : 0));

        /* Load our MAC address. */
        m = (uint16_t *)IF_LLADDR(sc->bge_ifp);
        CSR_WRITE_4(sc, BGE_MAC_ADDR1_LO, htons(m[0]));
        CSR_WRITE_4(sc, BGE_MAC_ADDR1_HI, (htons(m[1]) << 16) | htons(m[2]));

        /* Program promiscuous mode. */
        bge_setpromisc(sc);

        /* Program multicast filter. */
        bge_setmulti(sc);

        /* Program VLAN tag stripping. */
        bge_setvlan(sc);

        /* Override UDP checksum offloading. */
        if (sc->bge_forced_udpcsum == 0)
                sc->bge_csum_features &= ~CSUM_UDP;
        else
                sc->bge_csum_features |= CSUM_UDP;
        if (ifp->if_capabilities & IFCAP_TXCSUM &&
            ifp->if_capenable & IFCAP_TXCSUM) {
                ifp->if_hwassist &= ~(BGE_CSUM_FEATURES | CSUM_UDP);
                ifp->if_hwassist |= sc->bge_csum_features;
        }

        /* Init RX ring. */
        if (bge_init_rx_ring_std(sc) != 0) {
                device_printf(sc->bge_dev, "no memory for std Rx buffers.\n");
                bge_stop(sc);
                return;
        }

        /*
         * Workaround for a bug in 5705 ASIC rev A0. Poll the NIC's
         * memory to insure that the chip has in fact read the first
         * entry of the ring.
         */
        if (sc->bge_chipid == BGE_CHIPID_BCM5705_A0) {
                uint32_t                v, i;
                for (i = 0; i < 10; i++) {
                        DELAY(20);
                        v = bge_readmem_ind(sc, BGE_STD_RX_RINGS + 8);
                        if (v == (MCLBYTES - ETHER_ALIGN))
                                break;
                }
                if (i == 10)
                        device_printf (sc->bge_dev,
                            "5705 A0 chip failed to load RX ring\n");
        }

        /* Init jumbo RX ring. */
        if (BGE_IS_JUMBO_CAPABLE(sc) &&
            ifp->if_mtu + ETHER_HDR_LEN + ETHER_CRC_LEN + ETHER_VLAN_ENCAP_LEN >
            (MCLBYTES - ETHER_ALIGN)) {
                if (bge_init_rx_ring_jumbo(sc) != 0) {
                        device_printf(sc->bge_dev,
                            "no memory for jumbo Rx buffers.\n");
                        bge_stop(sc);
                        return;
                }
        }

        /* Init our RX return ring index. */
        sc->bge_rx_saved_considx = 0;

        /* Init our RX/TX stat counters. */
        sc->bge_rx_discards = sc->bge_tx_discards = sc->bge_tx_collisions = 0;

        /* Init TX ring. */
        bge_init_tx_ring(sc);

        /* Enable TX MAC state machine lockup fix. */
        mode = CSR_READ_4(sc, BGE_TX_MODE);
        if (BGE_IS_5755_PLUS(sc) || sc->bge_asicrev == BGE_ASICREV_BCM5906)
                mode |= BGE_TXMODE_MBUF_LOCKUP_FIX;
        if (sc->bge_asicrev == BGE_ASICREV_BCM5720 ||
            sc->bge_asicrev == BGE_ASICREV_BCM5762) {
                mode &= ~(BGE_TXMODE_JMB_FRM_LEN | BGE_TXMODE_CNT_DN_MODE);
                mode |= CSR_READ_4(sc, BGE_TX_MODE) &
                    (BGE_TXMODE_JMB_FRM_LEN | BGE_TXMODE_CNT_DN_MODE);
        }
        /* Turn on transmitter. */
        CSR_WRITE_4(sc, BGE_TX_MODE, mode | BGE_TXMODE_ENABLE);
        DELAY(100);

        /* Turn on receiver. */
        mode = CSR_READ_4(sc, BGE_RX_MODE);
        if (BGE_IS_5755_PLUS(sc))
                mode |= BGE_RXMODE_IPV6_ENABLE;
        CSR_WRITE_4(sc,BGE_RX_MODE, mode | BGE_RXMODE_ENABLE);
        DELAY(10);

        /*
         * Set the number of good frames to receive after RX MBUF
         * Low Watermark has been reached. After the RX MAC receives
         * this number of frames, it will drop subsequent incoming
         * frames until the MBUF High Watermark is reached.
         */
        if (BGE_IS_57765_PLUS(sc))
                CSR_WRITE_4(sc, BGE_MAX_RX_FRAME_LOWAT, 1);
        else
                CSR_WRITE_4(sc, BGE_MAX_RX_FRAME_LOWAT, 2);

        /* Clear MAC statistics. */
        if (BGE_IS_5705_PLUS(sc))
                bge_stats_clear_regs(sc);

        /* Tell firmware we're alive. */
        BGE_SETBIT(sc, BGE_MODE_CTL, BGE_MODECTL_STACKUP);

#ifdef DEVICE_POLLING
        /* Disable interrupts if we are polling. */
        if (ifp->if_capenable & IFCAP_POLLING) {
                BGE_SETBIT(sc, BGE_PCI_MISC_CTL,
                    BGE_PCIMISCCTL_MASK_PCI_INTR);
                bge_writembx(sc, BGE_MBX_IRQ0_LO, 1);
        } else
#endif

        /* Enable host interrupts. */
        {
        BGE_SETBIT(sc, BGE_PCI_MISC_CTL, BGE_PCIMISCCTL_CLEAR_INTA);
        BGE_CLRBIT(sc, BGE_PCI_MISC_CTL, BGE_PCIMISCCTL_MASK_PCI_INTR);
        bge_writembx(sc, BGE_MBX_IRQ0_LO, 0);
        }

        ifp->if_drv_flags |= IFF_DRV_RUNNING;
        ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;

        bge_ifmedia_upd_locked(ifp);

        callout_reset(&sc->bge_stat_ch, hz, bge_tick, sc);
}

static void
bge_init(void *xsc)
{
        struct bge_softc *sc = xsc;

        BGE_LOCK(sc);
        bge_init_locked(sc);
        BGE_UNLOCK(sc);
}

/*
 * Set media options.
 */
static int
bge_ifmedia_upd(struct ifnet *ifp)
{
        struct bge_softc *sc = ifp->if_softc;
        int res;

        BGE_LOCK(sc);
        res = bge_ifmedia_upd_locked(ifp);
        BGE_UNLOCK(sc);

        return (res);
}

static int
bge_ifmedia_upd_locked(struct ifnet *ifp)
{
        struct bge_softc *sc = ifp->if_softc;
        struct mii_data *mii;
        struct mii_softc *miisc;
        struct ifmedia *ifm;

        BGE_LOCK_ASSERT(sc);

        ifm = &sc->bge_ifmedia;

        /* If this is a 1000baseX NIC, enable the TBI port. */
        if (sc->bge_flags & BGE_FLAG_TBI) {
                if (IFM_TYPE(ifm->ifm_media) != IFM_ETHER)
                        return (EINVAL);
                switch(IFM_SUBTYPE(ifm->ifm_media)) {
                case IFM_AUTO:
                        /*
                         * The BCM5704 ASIC appears to have a special
                         * mechanism for programming the autoneg
                         * advertisement registers in TBI mode.
                         */
                        if (sc->bge_asicrev == BGE_ASICREV_BCM5704) {
                                uint32_t sgdig;
                                sgdig = CSR_READ_4(sc, BGE_SGDIG_STS);
                                if (sgdig & BGE_SGDIGSTS_DONE) {
                                        CSR_WRITE_4(sc, BGE_TX_TBI_AUTONEG, 0);
                                        sgdig = CSR_READ_4(sc, BGE_SGDIG_CFG);
                                        sgdig |= BGE_SGDIGCFG_AUTO |
                                            BGE_SGDIGCFG_PAUSE_CAP |
                                            BGE_SGDIGCFG_ASYM_PAUSE;
                                        CSR_WRITE_4(sc, BGE_SGDIG_CFG,
                                            sgdig | BGE_SGDIGCFG_SEND);
                                        DELAY(5);
                                        CSR_WRITE_4(sc, BGE_SGDIG_CFG, sgdig);
                                }
                        }
                        break;
                case IFM_1000_SX:
                        if ((ifm->ifm_media & IFM_GMASK) == IFM_FDX) {
                                BGE_CLRBIT(sc, BGE_MAC_MODE,
                                    BGE_MACMODE_HALF_DUPLEX);
                        } else {
                                BGE_SETBIT(sc, BGE_MAC_MODE,
                                    BGE_MACMODE_HALF_DUPLEX);
                        }
                        DELAY(40);
                        break;
                default:
                        return (EINVAL);
                }
                return (0);
        }

        sc->bge_link_evt++;
        mii = device_get_softc(sc->bge_miibus);
        LIST_FOREACH(miisc, &mii->mii_phys, mii_list)
                PHY_RESET(miisc);
        mii_mediachg(mii);

        /*
         * Force an interrupt so that we will call bge_link_upd
         * if needed and clear any pending link state attention.
         * Without this we are not getting any further interrupts
         * for link state changes and thus will not UP the link and
         * not be able to send in bge_start_locked. The only
         * way to get things working was to receive a packet and
         * get an RX intr.
         * bge_tick should help for fiber cards and we might not
         * need to do this here if BGE_FLAG_TBI is set but as
         * we poll for fiber anyway it should not harm.
         */
        if (sc->bge_asicrev == BGE_ASICREV_BCM5700 ||
            sc->bge_flags & BGE_FLAG_5788)
                BGE_SETBIT(sc, BGE_MISC_LOCAL_CTL, BGE_MLC_INTR_SET);
        else
                BGE_SETBIT(sc, BGE_HCC_MODE, BGE_HCCMODE_COAL_NOW);

        return (0);
}

/*
 * Report current media status.
 */
static void
bge_ifmedia_sts(struct ifnet *ifp, struct ifmediareq *ifmr)
{
        struct bge_softc *sc = ifp->if_softc;
        struct mii_data *mii;

        BGE_LOCK(sc);

        if ((ifp->if_flags & IFF_UP) == 0) {
                BGE_UNLOCK(sc);
                return;
        }
        if (sc->bge_flags & BGE_FLAG_TBI) {
                ifmr->ifm_status = IFM_AVALID;
                ifmr->ifm_active = IFM_ETHER;
                if (CSR_READ_4(sc, BGE_MAC_STS) &
                    BGE_MACSTAT_TBI_PCS_SYNCHED)
                        ifmr->ifm_status |= IFM_ACTIVE;
                else {
                        ifmr->ifm_active |= IFM_NONE;
                        BGE_UNLOCK(sc);
                        return;
                }
                ifmr->ifm_active |= IFM_1000_SX;
                if (CSR_READ_4(sc, BGE_MAC_MODE) & BGE_MACMODE_HALF_DUPLEX)
                        ifmr->ifm_active |= IFM_HDX;
                else
                        ifmr->ifm_active |= IFM_FDX;
                BGE_UNLOCK(sc);
                return;
        }

        mii = device_get_softc(sc->bge_miibus);
        mii_pollstat(mii);
        ifmr->ifm_active = mii->mii_media_active;
        ifmr->ifm_status = mii->mii_media_status;

        BGE_UNLOCK(sc);
}

static int
bge_ioctl(struct ifnet *ifp, u_long command, caddr_t data)
{
        struct bge_softc *sc = ifp->if_softc;
        struct ifreq *ifr = (struct ifreq *) data;
        struct mii_data *mii;
        int flags, mask, error = 0;

        switch (command) {
        case SIOCSIFMTU:
                if (BGE_IS_JUMBO_CAPABLE(sc) ||
                    (sc->bge_flags & BGE_FLAG_JUMBO_STD)) {
                        if (ifr->ifr_mtu < ETHERMIN ||
                            ifr->ifr_mtu > BGE_JUMBO_MTU) {
                                error = EINVAL;
                                break;
                        }
                } else if (ifr->ifr_mtu < ETHERMIN || ifr->ifr_mtu > ETHERMTU) {
                        error = EINVAL;
                        break;
                }
                BGE_LOCK(sc);
                if (ifp->if_mtu != ifr->ifr_mtu) {
                        ifp->if_mtu = ifr->ifr_mtu;
                        if (ifp->if_drv_flags & IFF_DRV_RUNNING) {
                                ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
                                bge_init_locked(sc);
                        }
                }
                BGE_UNLOCK(sc);
                break;
        case SIOCSIFFLAGS:
                BGE_LOCK(sc);
                if (ifp->if_flags & IFF_UP) {
                        /*
                         * If only the state of the PROMISC flag changed,
                         * then just use the 'set promisc mode' command
                         * instead of reinitializing the entire NIC. Doing
                         * a full re-init means reloading the firmware and
                         * waiting for it to start up, which may take a
                         * second or two.  Similarly for ALLMULTI.
                         */
                        if (ifp->if_drv_flags & IFF_DRV_RUNNING) {
                                flags = ifp->if_flags ^ sc->bge_if_flags;
                                if (flags & IFF_PROMISC)
                                        bge_setpromisc(sc);
                                if (flags & IFF_ALLMULTI)
                                        bge_setmulti(sc);
                        } else
                                bge_init_locked(sc);
                } else {
                        if (ifp->if_drv_flags & IFF_DRV_RUNNING) {
                                bge_stop(sc);
                        }
                }
                sc->bge_if_flags = ifp->if_flags;
                BGE_UNLOCK(sc);
                error = 0;
                break;
        case SIOCADDMULTI:
        case SIOCDELMULTI:
                if (ifp->if_drv_flags & IFF_DRV_RUNNING) {
                        BGE_LOCK(sc);
                        bge_setmulti(sc);
                        BGE_UNLOCK(sc);
                        error = 0;
                }
                break;
        case SIOCSIFMEDIA:
        case SIOCGIFMEDIA:
                if (sc->bge_flags & BGE_FLAG_TBI) {
                        error = ifmedia_ioctl(ifp, ifr,
                            &sc->bge_ifmedia, command);
                } else {
                        mii = device_get_softc(sc->bge_miibus);
                        error = ifmedia_ioctl(ifp, ifr,
                            &mii->mii_media, command);
                }
                break;
        case SIOCSIFCAP:
                mask = ifr->ifr_reqcap ^ ifp->if_capenable;
#ifdef DEVICE_POLLING
                if (mask & IFCAP_POLLING) {
                        if (ifr->ifr_reqcap & IFCAP_POLLING) {
                                error = ether_poll_register(bge_poll, ifp);
                                if (error)
                                        return (error);
                                BGE_LOCK(sc);
                                BGE_SETBIT(sc, BGE_PCI_MISC_CTL,
                                    BGE_PCIMISCCTL_MASK_PCI_INTR);
                                bge_writembx(sc, BGE_MBX_IRQ0_LO, 1);
                                ifp->if_capenable |= IFCAP_POLLING;
                                BGE_UNLOCK(sc);
                        } else {
                                error = ether_poll_deregister(ifp);
                                /* Enable interrupt even in error case */
                                BGE_LOCK(sc);
                                BGE_CLRBIT(sc, BGE_PCI_MISC_CTL,
                                    BGE_PCIMISCCTL_MASK_PCI_INTR);
                                bge_writembx(sc, BGE_MBX_IRQ0_LO, 0);
                                ifp->if_capenable &= ~IFCAP_POLLING;
                                BGE_UNLOCK(sc);
                        }
                }
#endif
                if ((mask & IFCAP_TXCSUM) != 0 &&
                    (ifp->if_capabilities & IFCAP_TXCSUM) != 0) {
                        ifp->if_capenable ^= IFCAP_TXCSUM;
                        if ((ifp->if_capenable & IFCAP_TXCSUM) != 0)
                                ifp->if_hwassist |= sc->bge_csum_features;
                        else
                                ifp->if_hwassist &= ~sc->bge_csum_features;
                }

                if ((mask & IFCAP_RXCSUM) != 0 &&
                    (ifp->if_capabilities & IFCAP_RXCSUM) != 0)
                        ifp->if_capenable ^= IFCAP_RXCSUM;

                if ((mask & IFCAP_TSO4) != 0 &&
                    (ifp->if_capabilities & IFCAP_TSO4) != 0) {
                        ifp->if_capenable ^= IFCAP_TSO4;
                        if ((ifp->if_capenable & IFCAP_TSO4) != 0)
                                ifp->if_hwassist |= CSUM_TSO;
                        else
                                ifp->if_hwassist &= ~CSUM_TSO;
                }

                if (mask & IFCAP_VLAN_MTU) {
                        ifp->if_capenable ^= IFCAP_VLAN_MTU;
                        ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
                        bge_init(sc);
                }

                if ((mask & IFCAP_VLAN_HWTSO) != 0 &&
                    (ifp->if_capabilities & IFCAP_VLAN_HWTSO) != 0)
                        ifp->if_capenable ^= IFCAP_VLAN_HWTSO;
                if ((mask & IFCAP_VLAN_HWTAGGING) != 0 &&
                    (ifp->if_capabilities & IFCAP_VLAN_HWTAGGING) != 0) {
                        ifp->if_capenable ^= IFCAP_VLAN_HWTAGGING;
                        if ((ifp->if_capenable & IFCAP_VLAN_HWTAGGING) == 0)
                                ifp->if_capenable &= ~IFCAP_VLAN_HWTSO;
                        BGE_LOCK(sc);
                        bge_setvlan(sc);
                        BGE_UNLOCK(sc);
                }
#ifdef VLAN_CAPABILITIES
                VLAN_CAPABILITIES(ifp);
#endif
                break;
        default:
                error = ether_ioctl(ifp, command, data);
                break;
        }

        return (error);
}

static void
bge_watchdog(struct bge_softc *sc)
{
        struct ifnet *ifp;
        uint32_t status;

        BGE_LOCK_ASSERT(sc);

        if (sc->bge_timer == 0 || --sc->bge_timer)
                return;

        /* If pause frames are active then don't reset the hardware. */
        if ((CSR_READ_4(sc, BGE_RX_MODE) & BGE_RXMODE_FLOWCTL_ENABLE) != 0) {
                status = CSR_READ_4(sc, BGE_RX_STS);
                if ((status & BGE_RXSTAT_REMOTE_XOFFED) != 0) {
                        /*
                         * If link partner has us in XOFF state then wait for
                         * the condition to clear.
                         */
                        CSR_WRITE_4(sc, BGE_RX_STS, status);
                        sc->bge_timer = BGE_TX_TIMEOUT;
                        return;
                } else if ((status & BGE_RXSTAT_RCVD_XOFF) != 0 &&
                    (status & BGE_RXSTAT_RCVD_XON) != 0) {
                        /*
                         * If link partner has us in XOFF state then wait for
                         * the condition to clear.
                         */
                        CSR_WRITE_4(sc, BGE_RX_STS, status);
                        sc->bge_timer = BGE_TX_TIMEOUT;
                        return;
                }
                /*
                 * Any other condition is unexpected and the controller
                 * should be reset.
                 */
        }

        ifp = sc->bge_ifp;

        if_printf(ifp, "watchdog timeout -- resetting\n");

        ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
        bge_init_locked(sc);

        ifp->if_oerrors++;
}

static void
bge_stop_block(struct bge_softc *sc, bus_size_t reg, uint32_t bit)
{
        int i;

        BGE_CLRBIT(sc, reg, bit);

        for (i = 0; i < BGE_TIMEOUT; i++) {
                if ((CSR_READ_4(sc, reg) & bit) == 0)
                        return;
                DELAY(100);
        }
}

/*
 * Stop the adapter and free any mbufs allocated to the
 * RX and TX lists.
 */
static void
bge_stop(struct bge_softc *sc)
{
        struct ifnet *ifp;

        BGE_LOCK_ASSERT(sc);

        ifp = sc->bge_ifp;

        callout_stop(&sc->bge_stat_ch);

        /* Disable host interrupts. */
        BGE_SETBIT(sc, BGE_PCI_MISC_CTL, BGE_PCIMISCCTL_MASK_PCI_INTR);
        bge_writembx(sc, BGE_MBX_IRQ0_LO, 1);

        /*
         * Tell firmware we're shutting down.
         */
        bge_stop_fw(sc);
        bge_sig_pre_reset(sc, BGE_RESET_SHUTDOWN);

        /*
         * Disable all of the receiver blocks.
         */
        bge_stop_block(sc, BGE_RX_MODE, BGE_RXMODE_ENABLE);
        bge_stop_block(sc, BGE_RBDI_MODE, BGE_RBDIMODE_ENABLE);
        bge_stop_block(sc, BGE_RXLP_MODE, BGE_RXLPMODE_ENABLE);
        if (BGE_IS_5700_FAMILY(sc))
                bge_stop_block(sc, BGE_RXLS_MODE, BGE_RXLSMODE_ENABLE);
        bge_stop_block(sc, BGE_RDBDI_MODE, BGE_RBDIMODE_ENABLE);
        bge_stop_block(sc, BGE_RDC_MODE, BGE_RDCMODE_ENABLE);
        bge_stop_block(sc, BGE_RBDC_MODE, BGE_RBDCMODE_ENABLE);

        /*
         * Disable all of the transmit blocks.
         */
        bge_stop_block(sc, BGE_SRS_MODE, BGE_SRSMODE_ENABLE);
        bge_stop_block(sc, BGE_SBDI_MODE, BGE_SBDIMODE_ENABLE);
        bge_stop_block(sc, BGE_SDI_MODE, BGE_SDIMODE_ENABLE);
        bge_stop_block(sc, BGE_RDMA_MODE, BGE_RDMAMODE_ENABLE);
        bge_stop_block(sc, BGE_SDC_MODE, BGE_SDCMODE_ENABLE);
        if (BGE_IS_5700_FAMILY(sc))
                bge_stop_block(sc, BGE_DMAC_MODE, BGE_DMACMODE_ENABLE);
        bge_stop_block(sc, BGE_SBDC_MODE, BGE_SBDCMODE_ENABLE);

        /*
         * Shut down all of the memory managers and related
         * state machines.
         */
        bge_stop_block(sc, BGE_HCC_MODE, BGE_HCCMODE_ENABLE);
        bge_stop_block(sc, BGE_WDMA_MODE, BGE_WDMAMODE_ENABLE);
        if (BGE_IS_5700_FAMILY(sc))
                bge_stop_block(sc, BGE_MBCF_MODE, BGE_MBCFMODE_ENABLE);

        CSR_WRITE_4(sc, BGE_FTQ_RESET, 0xFFFFFFFF);
        CSR_WRITE_4(sc, BGE_FTQ_RESET, 0);
        if (!(BGE_IS_5705_PLUS(sc))) {
                BGE_CLRBIT(sc, BGE_BMAN_MODE, BGE_BMANMODE_ENABLE);
                BGE_CLRBIT(sc, BGE_MARB_MODE, BGE_MARBMODE_ENABLE);
        }
        /* Update MAC statistics. */
        if (BGE_IS_5705_PLUS(sc))
                bge_stats_update_regs(sc);

        bge_reset(sc);
        bge_sig_legacy(sc, BGE_RESET_SHUTDOWN);
        bge_sig_post_reset(sc, BGE_RESET_SHUTDOWN);

        /*
         * Keep the ASF firmware running if up.
         */
        if (sc->bge_asf_mode & ASF_STACKUP)
                BGE_SETBIT(sc, BGE_MODE_CTL, BGE_MODECTL_STACKUP);
        else
                BGE_CLRBIT(sc, BGE_MODE_CTL, BGE_MODECTL_STACKUP);

        /* Free the RX lists. */
        bge_free_rx_ring_std(sc);

        /* Free jumbo RX list. */
        if (BGE_IS_JUMBO_CAPABLE(sc))
                bge_free_rx_ring_jumbo(sc);

        /* Free TX buffers. */
        bge_free_tx_ring(sc);

        sc->bge_tx_saved_considx = BGE_TXCONS_UNSET;

        /* Clear MAC's link state (PHY may still have link UP). */
        if (bootverbose && sc->bge_link)
                if_printf(sc->bge_ifp, "link DOWN\n");
        sc->bge_link = 0;

        ifp->if_drv_flags &= ~(IFF_DRV_RUNNING | IFF_DRV_OACTIVE);
}

/*
 * Stop all chip I/O so that the kernel's probe routines don't
 * get confused by errant DMAs when rebooting.
 */
static int
bge_shutdown(device_t dev)
{
        struct bge_softc *sc;

        sc = device_get_softc(dev);
        BGE_LOCK(sc);
        bge_stop(sc);
        BGE_UNLOCK(sc);

        return (0);
}

static int
bge_suspend(device_t dev)
{
        struct bge_softc *sc;

        sc = device_get_softc(dev);
        BGE_LOCK(sc);
        bge_stop(sc);
        BGE_UNLOCK(sc);

        return (0);
}

static int
bge_resume(device_t dev)
{
        struct bge_softc *sc;
        struct ifnet *ifp;

        sc = device_get_softc(dev);
        BGE_LOCK(sc);
        ifp = sc->bge_ifp;
        if (ifp->if_flags & IFF_UP) {
                bge_init_locked(sc);
                if (ifp->if_drv_flags & IFF_DRV_RUNNING)
                        bge_start_locked(ifp);
        }
        BGE_UNLOCK(sc);

        return (0);
}

static void
bge_link_upd(struct bge_softc *sc)
{
        struct mii_data *mii;
        uint32_t link, status;

        BGE_LOCK_ASSERT(sc);

        /* Clear 'pending link event' flag. */
        sc->bge_link_evt = 0;

        /*
         * Process link state changes.
         * Grrr. The link status word in the status block does
         * not work correctly on the BCM5700 rev AX and BX chips,
         * according to all available information. Hence, we have
         * to enable MII interrupts in order to properly obtain
         * async link changes. Unfortunately, this also means that
         * we have to read the MAC status register to detect link
         * changes, thereby adding an additional register access to
         * the interrupt handler.
         *
         * XXX: perhaps link state detection procedure used for
         * BGE_CHIPID_BCM5700_B2 can be used for others BCM5700 revisions.
         */

        if (sc->bge_asicrev == BGE_ASICREV_BCM5700 &&
            sc->bge_chipid != BGE_CHIPID_BCM5700_B2) {
                status = CSR_READ_4(sc, BGE_MAC_STS);
                if (status & BGE_MACSTAT_MI_INTERRUPT) {
                        mii = device_get_softc(sc->bge_miibus);
                        mii_pollstat(mii);
                        if (!sc->bge_link &&
                            mii->mii_media_status & IFM_ACTIVE &&
                            IFM_SUBTYPE(mii->mii_media_active) != IFM_NONE) {
                                sc->bge_link++;
                                if (bootverbose)
                                        if_printf(sc->bge_ifp, "link UP\n");
                        } else if (sc->bge_link &&
                            (!(mii->mii_media_status & IFM_ACTIVE) ||
                            IFM_SUBTYPE(mii->mii_media_active) == IFM_NONE)) {
                                sc->bge_link = 0;
                                if (bootverbose)
                                        if_printf(sc->bge_ifp, "link DOWN\n");
                        }

                        /* Clear the interrupt. */
                        CSR_WRITE_4(sc, BGE_MAC_EVT_ENB,
                            BGE_EVTENB_MI_INTERRUPT);
                        bge_miibus_readreg(sc->bge_dev, sc->bge_phy_addr,
                            BRGPHY_MII_ISR);
                        bge_miibus_writereg(sc->bge_dev, sc->bge_phy_addr,
                            BRGPHY_MII_IMR, BRGPHY_INTRS);
                }
                return;
        }

        if (sc->bge_flags & BGE_FLAG_TBI) {
                status = CSR_READ_4(sc, BGE_MAC_STS);
                if (status & BGE_MACSTAT_TBI_PCS_SYNCHED) {
                        if (!sc->bge_link) {
                                sc->bge_link++;
                                if (sc->bge_asicrev == BGE_ASICREV_BCM5704) {
                                        BGE_CLRBIT(sc, BGE_MAC_MODE,
                                            BGE_MACMODE_TBI_SEND_CFGS);
                                        DELAY(40);
                                }
                                CSR_WRITE_4(sc, BGE_MAC_STS, 0xFFFFFFFF);
                                if (bootverbose)
                                        if_printf(sc->bge_ifp, "link UP\n");
                                if_link_state_change(sc->bge_ifp,
                                    LINK_STATE_UP);
                        }
                } else if (sc->bge_link) {
                        sc->bge_link = 0;
                        if (bootverbose)
                                if_printf(sc->bge_ifp, "link DOWN\n");
                        if_link_state_change(sc->bge_ifp, LINK_STATE_DOWN);
                }
        } else if ((sc->bge_mi_mode & BGE_MIMODE_AUTOPOLL) != 0) {
                /*
                 * Some broken BCM chips have BGE_STATFLAG_LINKSTATE_CHANGED bit
                 * in status word always set. Workaround this bug by reading
                 * PHY link status directly.
                 */
                link = (CSR_READ_4(sc, BGE_MI_STS) & BGE_MISTS_LINK) ? 1 : 0;

                if (link != sc->bge_link ||
                    sc->bge_asicrev == BGE_ASICREV_BCM5700) {
                        mii = device_get_softc(sc->bge_miibus);
                        mii_pollstat(mii);
                        if (!sc->bge_link &&
                            mii->mii_media_status & IFM_ACTIVE &&
                            IFM_SUBTYPE(mii->mii_media_active) != IFM_NONE) {
                                sc->bge_link++;
                                if (bootverbose)
                                        if_printf(sc->bge_ifp, "link UP\n");
                        } else if (sc->bge_link &&
                            (!(mii->mii_media_status & IFM_ACTIVE) ||
                            IFM_SUBTYPE(mii->mii_media_active) == IFM_NONE)) {
                                sc->bge_link = 0;
                                if (bootverbose)
                                        if_printf(sc->bge_ifp, "link DOWN\n");
                        }
                }
        } else {
                /*
                 * For controllers that call mii_tick, we have to poll
                 * link status.
                 */
                mii = device_get_softc(sc->bge_miibus);
                mii_pollstat(mii);
                bge_miibus_statchg(sc->bge_dev);
        }

        /* Disable MAC attention when link is up. */
        CSR_WRITE_4(sc, BGE_MAC_STS, BGE_MACSTAT_SYNC_CHANGED |
            BGE_MACSTAT_CFG_CHANGED | BGE_MACSTAT_MI_COMPLETE |
            BGE_MACSTAT_LINK_CHANGED);
}

static void
bge_add_sysctls(struct bge_softc *sc)
{
        struct sysctl_ctx_list *ctx;
        struct sysctl_oid_list *children;
        char tn[32];
        int unit;

        ctx = device_get_sysctl_ctx(sc->bge_dev);
        children = SYSCTL_CHILDREN(device_get_sysctl_tree(sc->bge_dev));

#ifdef BGE_REGISTER_DEBUG
        SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "debug_info",
            CTLTYPE_INT | CTLFLAG_RW, sc, 0, bge_sysctl_debug_info, "I",
            "Debug Information");

        SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "reg_read",
            CTLTYPE_INT | CTLFLAG_RW, sc, 0, bge_sysctl_reg_read, "I",
            "MAC Register Read");

        SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "ape_read",
            CTLTYPE_INT | CTLFLAG_RW, sc, 0, bge_sysctl_ape_read, "I",
            "APE Register Read");

        SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "mem_read",
            CTLTYPE_INT | CTLFLAG_RW, sc, 0, bge_sysctl_mem_read, "I",
            "Memory Read");

#endif

        unit = device_get_unit(sc->bge_dev);
        /*
         * A common design characteristic for many Broadcom client controllers
         * is that they only support a single outstanding DMA read operation
         * on the PCIe bus. This means that it will take twice as long to fetch
         * a TX frame that is split into header and payload buffers as it does
         * to fetch a single, contiguous TX frame (2 reads vs. 1 read). For
         * these controllers, coalescing buffers to reduce the number of memory
         * reads is effective way to get maximum performance(about 940Mbps).
         * Without collapsing TX buffers the maximum TCP bulk transfer
         * performance is about 850Mbps. However forcing coalescing mbufs
         * consumes a lot of CPU cycles, so leave it off by default.
         */
        sc->bge_forced_collapse = 0;
        snprintf(tn, sizeof(tn), "dev.bge.%d.forced_collapse", unit);
        TUNABLE_INT_FETCH(tn, &sc->bge_forced_collapse);
        SYSCTL_ADD_INT(ctx, children, OID_AUTO, "forced_collapse",
            CTLFLAG_RW, &sc->bge_forced_collapse, 0,
            "Number of fragmented TX buffers of a frame allowed before "
            "forced collapsing");

        sc->bge_msi = 1;
        snprintf(tn, sizeof(tn), "dev.bge.%d.msi", unit);
        TUNABLE_INT_FETCH(tn, &sc->bge_msi);
        SYSCTL_ADD_INT(ctx, children, OID_AUTO, "msi",
            CTLFLAG_RD, &sc->bge_msi, 0, "Enable MSI");

        /*
         * It seems all Broadcom controllers have a bug that can generate UDP
         * datagrams with checksum value 0 when TX UDP checksum offloading is
         * enabled.  Generating UDP checksum value 0 is RFC 768 violation.
         * Even though the probability of generating such UDP datagrams is
         * low, I don't want to see FreeBSD boxes to inject such datagrams
         * into network so disable UDP checksum offloading by default.  Users
         * still override this behavior by setting a sysctl variable,
         * dev.bge.0.forced_udpcsum.
         */
        sc->bge_forced_udpcsum = 0;
        snprintf(tn, sizeof(tn), "dev.bge.%d.bge_forced_udpcsum", unit);
        TUNABLE_INT_FETCH(tn, &sc->bge_forced_udpcsum);
        SYSCTL_ADD_INT(ctx, children, OID_AUTO, "forced_udpcsum",
            CTLFLAG_RW, &sc->bge_forced_udpcsum, 0,
            "Enable UDP checksum offloading even if controller can "
            "generate UDP checksum value 0");

        if (BGE_IS_5705_PLUS(sc))
                bge_add_sysctl_stats_regs(sc, ctx, children);
        else
                bge_add_sysctl_stats(sc, ctx, children);
}

#define BGE_SYSCTL_STAT(sc, ctx, desc, parent, node, oid) \
        SYSCTL_ADD_PROC(ctx, parent, OID_AUTO, oid, CTLTYPE_UINT|CTLFLAG_RD, \
            sc, offsetof(struct bge_stats, node), bge_sysctl_stats, "IU", \
            desc)

static void
bge_add_sysctl_stats(struct bge_softc *sc, struct sysctl_ctx_list *ctx,
    struct sysctl_oid_list *parent)
{
        struct sysctl_oid *tree;
        struct sysctl_oid_list *children, *schildren;

        tree = SYSCTL_ADD_NODE(ctx, parent, OID_AUTO, "stats", CTLFLAG_RD,
            NULL, "BGE Statistics");
        schildren = children = SYSCTL_CHILDREN(tree);
        BGE_SYSCTL_STAT(sc, ctx, "Frames Dropped Due To Filters",
            children, COSFramesDroppedDueToFilters,
            "FramesDroppedDueToFilters");
        BGE_SYSCTL_STAT(sc, ctx, "NIC DMA Write Queue Full",
            children, nicDmaWriteQueueFull, "DmaWriteQueueFull");
        BGE_SYSCTL_STAT(sc, ctx, "NIC DMA Write High Priority Queue Full",
            children, nicDmaWriteHighPriQueueFull, "DmaWriteHighPriQueueFull");
        BGE_SYSCTL_STAT(sc, ctx, "NIC No More RX Buffer Descriptors",
            children, nicNoMoreRxBDs, "NoMoreRxBDs");
        BGE_SYSCTL_STAT(sc, ctx, "Discarded Input Frames",
            children, ifInDiscards, "InputDiscards");
        BGE_SYSCTL_STAT(sc, ctx, "Input Errors",
            children, ifInErrors, "InputErrors");
        BGE_SYSCTL_STAT(sc, ctx, "NIC Recv Threshold Hit",
            children, nicRecvThresholdHit, "RecvThresholdHit");
        BGE_SYSCTL_STAT(sc, ctx, "NIC DMA Read Queue Full",
            children, nicDmaReadQueueFull, "DmaReadQueueFull");
        BGE_SYSCTL_STAT(sc, ctx, "NIC DMA Read High Priority Queue Full",
            children, nicDmaReadHighPriQueueFull, "DmaReadHighPriQueueFull");
        BGE_SYSCTL_STAT(sc, ctx, "NIC Send Data Complete Queue Full",
            children, nicSendDataCompQueueFull, "SendDataCompQueueFull");
        BGE_SYSCTL_STAT(sc, ctx, "NIC Ring Set Send Producer Index",
            children, nicRingSetSendProdIndex, "RingSetSendProdIndex");
        BGE_SYSCTL_STAT(sc, ctx, "NIC Ring Status Update",
            children, nicRingStatusUpdate, "RingStatusUpdate");
        BGE_SYSCTL_STAT(sc, ctx, "NIC Interrupts",
            children, nicInterrupts, "Interrupts");
        BGE_SYSCTL_STAT(sc, ctx, "NIC Avoided Interrupts",
            children, nicAvoidedInterrupts, "AvoidedInterrupts");
        BGE_SYSCTL_STAT(sc, ctx, "NIC Send Threshold Hit",
            children, nicSendThresholdHit, "SendThresholdHit");

        tree = SYSCTL_ADD_NODE(ctx, schildren, OID_AUTO, "rx", CTLFLAG_RD,
            NULL, "BGE RX Statistics");
        children = SYSCTL_CHILDREN(tree);
        BGE_SYSCTL_STAT(sc, ctx, "Inbound Octets",
            children, rxstats.ifHCInOctets, "ifHCInOctets");
        BGE_SYSCTL_STAT(sc, ctx, "Fragments",
            children, rxstats.etherStatsFragments, "Fragments");
        BGE_SYSCTL_STAT(sc, ctx, "Inbound Unicast Packets",
            children, rxstats.ifHCInUcastPkts, "UnicastPkts");
        BGE_SYSCTL_STAT(sc, ctx, "Inbound Multicast Packets",
            children, rxstats.ifHCInMulticastPkts, "MulticastPkts");
        BGE_SYSCTL_STAT(sc, ctx, "FCS Errors",
            children, rxstats.dot3StatsFCSErrors, "FCSErrors");
        BGE_SYSCTL_STAT(sc, ctx, "Alignment Errors",
            children, rxstats.dot3StatsAlignmentErrors, "AlignmentErrors");
        BGE_SYSCTL_STAT(sc, ctx, "XON Pause Frames Received",
            children, rxstats.xonPauseFramesReceived, "xonPauseFramesReceived");
        BGE_SYSCTL_STAT(sc, ctx, "XOFF Pause Frames Received",
            children, rxstats.xoffPauseFramesReceived,
            "xoffPauseFramesReceived");
        BGE_SYSCTL_STAT(sc, ctx, "MAC Control Frames Received",
            children, rxstats.macControlFramesReceived,
            "ControlFramesReceived");
        BGE_SYSCTL_STAT(sc, ctx, "XOFF State Entered",
            children, rxstats.xoffStateEntered, "xoffStateEntered");
        BGE_SYSCTL_STAT(sc, ctx, "Frames Too Long",
            children, rxstats.dot3StatsFramesTooLong, "FramesTooLong");
        BGE_SYSCTL_STAT(sc, ctx, "Jabbers",
            children, rxstats.etherStatsJabbers, "Jabbers");
        BGE_SYSCTL_STAT(sc, ctx, "Undersized Packets",
            children, rxstats.etherStatsUndersizePkts, "UndersizePkts");
        BGE_SYSCTL_STAT(sc, ctx, "Inbound Range Length Errors",
            children, rxstats.inRangeLengthError, "inRangeLengthError");
        BGE_SYSCTL_STAT(sc, ctx, "Outbound Range Length Errors",
            children, rxstats.outRangeLengthError, "outRangeLengthError");

        tree = SYSCTL_ADD_NODE(ctx, schildren, OID_AUTO, "tx", CTLFLAG_RD,
            NULL, "BGE TX Statistics");
        children = SYSCTL_CHILDREN(tree);
        BGE_SYSCTL_STAT(sc, ctx, "Outbound Octets",
            children, txstats.ifHCOutOctets, "ifHCOutOctets");
        BGE_SYSCTL_STAT(sc, ctx, "TX Collisions",
            children, txstats.etherStatsCollisions, "Collisions");
        BGE_SYSCTL_STAT(sc, ctx, "XON Sent",
            children, txstats.outXonSent, "XonSent");
        BGE_SYSCTL_STAT(sc, ctx, "XOFF Sent",
            children, txstats.outXoffSent, "XoffSent");
        BGE_SYSCTL_STAT(sc, ctx, "Flow Control Done",
            children, txstats.flowControlDone, "flowControlDone");
        BGE_SYSCTL_STAT(sc, ctx, "Internal MAC TX errors",
            children, txstats.dot3StatsInternalMacTransmitErrors,
            "InternalMacTransmitErrors");
        BGE_SYSCTL_STAT(sc, ctx, "Single Collision Frames",
            children, txstats.dot3StatsSingleCollisionFrames,
            "SingleCollisionFrames");
        BGE_SYSCTL_STAT(sc, ctx, "Multiple Collision Frames",
            children, txstats.dot3StatsMultipleCollisionFrames,
            "MultipleCollisionFrames");
        BGE_SYSCTL_STAT(sc, ctx, "Deferred Transmissions",
            children, txstats.dot3StatsDeferredTransmissions,
            "DeferredTransmissions");
        BGE_SYSCTL_STAT(sc, ctx, "Excessive Collisions",
            children, txstats.dot3StatsExcessiveCollisions,
            "ExcessiveCollisions");
        BGE_SYSCTL_STAT(sc, ctx, "Late Collisions",
            children, txstats.dot3StatsLateCollisions,
            "LateCollisions");
        BGE_SYSCTL_STAT(sc, ctx, "Outbound Unicast Packets",
            children, txstats.ifHCOutUcastPkts, "UnicastPkts");
        BGE_SYSCTL_STAT(sc, ctx, "Outbound Multicast Packets",
            children, txstats.ifHCOutMulticastPkts, "MulticastPkts");
        BGE_SYSCTL_STAT(sc, ctx, "Outbound Broadcast Packets",
            children, txstats.ifHCOutBroadcastPkts, "BroadcastPkts");
        BGE_SYSCTL_STAT(sc, ctx, "Carrier Sense Errors",
            children, txstats.dot3StatsCarrierSenseErrors,
            "CarrierSenseErrors");
        BGE_SYSCTL_STAT(sc, ctx, "Outbound Discards",
            children, txstats.ifOutDiscards, "Discards");
        BGE_SYSCTL_STAT(sc, ctx, "Outbound Errors",
            children, txstats.ifOutErrors, "Errors");
}

#undef BGE_SYSCTL_STAT

#define BGE_SYSCTL_STAT_ADD64(c, h, n, p, d)    \
            SYSCTL_ADD_UQUAD(c, h, OID_AUTO, n, CTLFLAG_RD, p, d)

static void
bge_add_sysctl_stats_regs(struct bge_softc *sc, struct sysctl_ctx_list *ctx,
    struct sysctl_oid_list *parent)
{
        struct sysctl_oid *tree;
        struct sysctl_oid_list *child, *schild;
        struct bge_mac_stats *stats;

        stats = &sc->bge_mac_stats;
        tree = SYSCTL_ADD_NODE(ctx, parent, OID_AUTO, "stats", CTLFLAG_RD,
            NULL, "BGE Statistics");
        schild = child = SYSCTL_CHILDREN(tree);
        BGE_SYSCTL_STAT_ADD64(ctx, child, "FramesDroppedDueToFilters",
            &stats->FramesDroppedDueToFilters, "Frames Dropped Due to Filters");
        BGE_SYSCTL_STAT_ADD64(ctx, child, "DmaWriteQueueFull",
            &stats->DmaWriteQueueFull, "NIC DMA Write Queue Full");
        BGE_SYSCTL_STAT_ADD64(ctx, child, "DmaWriteHighPriQueueFull",
            &stats->DmaWriteHighPriQueueFull,
            "NIC DMA Write High Priority Queue Full");
        BGE_SYSCTL_STAT_ADD64(ctx, child, "NoMoreRxBDs",
            &stats->NoMoreRxBDs, "NIC No More RX Buffer Descriptors");
        BGE_SYSCTL_STAT_ADD64(ctx, child, "InputDiscards",
            &stats->InputDiscards, "Discarded Input Frames");
        BGE_SYSCTL_STAT_ADD64(ctx, child, "InputErrors",
            &stats->InputErrors, "Input Errors");
        BGE_SYSCTL_STAT_ADD64(ctx, child, "RecvThresholdHit",
            &stats->RecvThresholdHit, "NIC Recv Threshold Hit");

        tree = SYSCTL_ADD_NODE(ctx, schild, OID_AUTO, "rx", CTLFLAG_RD,
            NULL, "BGE RX Statistics");
        child = SYSCTL_CHILDREN(tree);
        BGE_SYSCTL_STAT_ADD64(ctx, child, "ifHCInOctets",
            &stats->ifHCInOctets, "Inbound Octets");
        BGE_SYSCTL_STAT_ADD64(ctx, child, "Fragments",
            &stats->etherStatsFragments, "Fragments");
        BGE_SYSCTL_STAT_ADD64(ctx, child, "UnicastPkts",
            &stats->ifHCInUcastPkts, "Inbound Unicast Packets");
        BGE_SYSCTL_STAT_ADD64(ctx, child, "MulticastPkts",
            &stats->ifHCInMulticastPkts, "Inbound Multicast Packets");
        BGE_SYSCTL_STAT_ADD64(ctx, child, "BroadcastPkts",
            &stats->ifHCInBroadcastPkts, "Inbound Broadcast Packets");
        BGE_SYSCTL_STAT_ADD64(ctx, child, "FCSErrors",
            &stats->dot3StatsFCSErrors, "FCS Errors");
        BGE_SYSCTL_STAT_ADD64(ctx, child, "AlignmentErrors",
            &stats->dot3StatsAlignmentErrors, "Alignment Errors");
        BGE_SYSCTL_STAT_ADD64(ctx, child, "xonPauseFramesReceived",
            &stats->xonPauseFramesReceived, "XON Pause Frames Received");
        BGE_SYSCTL_STAT_ADD64(ctx, child, "xoffPauseFramesReceived",
            &stats->xoffPauseFramesReceived, "XOFF Pause Frames Received");
        BGE_SYSCTL_STAT_ADD64(ctx, child, "ControlFramesReceived",
            &stats->macControlFramesReceived, "MAC Control Frames Received");
        BGE_SYSCTL_STAT_ADD64(ctx, child, "xoffStateEntered",
            &stats->xoffStateEntered, "XOFF State Entered");
        BGE_SYSCTL_STAT_ADD64(ctx, child, "FramesTooLong",
            &stats->dot3StatsFramesTooLong, "Frames Too Long");
        BGE_SYSCTL_STAT_ADD64(ctx, child, "Jabbers",
            &stats->etherStatsJabbers, "Jabbers");
        BGE_SYSCTL_STAT_ADD64(ctx, child, "UndersizePkts",
            &stats->etherStatsUndersizePkts, "Undersized Packets");

        tree = SYSCTL_ADD_NODE(ctx, schild, OID_AUTO, "tx", CTLFLAG_RD,
            NULL, "BGE TX Statistics");
        child = SYSCTL_CHILDREN(tree);
        BGE_SYSCTL_STAT_ADD64(ctx, child, "ifHCOutOctets",
            &stats->ifHCOutOctets, "Outbound Octets");
        BGE_SYSCTL_STAT_ADD64(ctx, child, "Collisions",
            &stats->etherStatsCollisions, "TX Collisions");
        BGE_SYSCTL_STAT_ADD64(ctx, child, "XonSent",
            &stats->outXonSent, "XON Sent");
        BGE_SYSCTL_STAT_ADD64(ctx, child, "XoffSent",
            &stats->outXoffSent, "XOFF Sent");
        BGE_SYSCTL_STAT_ADD64(ctx, child, "InternalMacTransmitErrors",
            &stats->dot3StatsInternalMacTransmitErrors,
            "Internal MAC TX Errors");
        BGE_SYSCTL_STAT_ADD64(ctx, child, "SingleCollisionFrames",
            &stats->dot3StatsSingleCollisionFrames, "Single Collision Frames");
        BGE_SYSCTL_STAT_ADD64(ctx, child, "MultipleCollisionFrames",
            &stats->dot3StatsMultipleCollisionFrames,
            "Multiple Collision Frames");
        BGE_SYSCTL_STAT_ADD64(ctx, child, "DeferredTransmissions",
            &stats->dot3StatsDeferredTransmissions, "Deferred Transmissions");
        BGE_SYSCTL_STAT_ADD64(ctx, child, "ExcessiveCollisions",
            &stats->dot3StatsExcessiveCollisions, "Excessive Collisions");
        BGE_SYSCTL_STAT_ADD64(ctx, child, "LateCollisions",
            &stats->dot3StatsLateCollisions, "Late Collisions");
        BGE_SYSCTL_STAT_ADD64(ctx, child, "UnicastPkts",
            &stats->ifHCOutUcastPkts, "Outbound Unicast Packets");
        BGE_SYSCTL_STAT_ADD64(ctx, child, "MulticastPkts",
            &stats->ifHCOutMulticastPkts, "Outbound Multicast Packets");
        BGE_SYSCTL_STAT_ADD64(ctx, child, "BroadcastPkts",
            &stats->ifHCOutBroadcastPkts, "Outbound Broadcast Packets");
}

#undef  BGE_SYSCTL_STAT_ADD64

static int
bge_sysctl_stats(SYSCTL_HANDLER_ARGS)
{
        struct bge_softc *sc;
        uint32_t result;
        int offset;

        sc = (struct bge_softc *)arg1;
        offset = arg2;
        result = CSR_READ_4(sc, BGE_MEMWIN_START + BGE_STATS_BLOCK + offset +
            offsetof(bge_hostaddr, bge_addr_lo));
        return (sysctl_handle_int(oidp, &result, 0, req));
}

#ifdef BGE_REGISTER_DEBUG
static int
bge_sysctl_debug_info(SYSCTL_HANDLER_ARGS)
{
        struct bge_softc *sc;
        uint16_t *sbdata;
        int error, result, sbsz;
        int i, j;

        result = -1;
        error = sysctl_handle_int(oidp, &result, 0, req);
        if (error || (req->newptr == NULL))
                return (error);

        if (result == 1) {
                sc = (struct bge_softc *)arg1;

                if (sc->bge_asicrev == BGE_ASICREV_BCM5700 &&
                    sc->bge_chipid != BGE_CHIPID_BCM5700_C0)
                        sbsz = BGE_STATUS_BLK_SZ;
                else
                        sbsz = 32;
                sbdata = (uint16_t *)sc->bge_ldata.bge_status_block;
                printf("Status Block:\n");
                BGE_LOCK(sc);
                bus_dmamap_sync(sc->bge_cdata.bge_status_tag,
                    sc->bge_cdata.bge_status_map,
                    BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE);
                for (i = 0x0; i < sbsz / sizeof(uint16_t); ) {
                        printf("%06x:", i);
                        for (j = 0; j < 8; j++)
                                printf(" %04x", sbdata[i++]);
                        printf("\n");
                }

                printf("Registers:\n");
                for (i = 0x800; i < 0xA00; ) {
                        printf("%06x:", i);
                        for (j = 0; j < 8; j++) {
                                printf(" %08x", CSR_READ_4(sc, i));
                                i += 4;
                        }
                        printf("\n");
                }
                BGE_UNLOCK(sc);

                printf("Hardware Flags:\n");
                if (BGE_IS_5717_PLUS(sc))
                        printf(" - 5717 Plus\n");
                if (BGE_IS_5755_PLUS(sc))
                        printf(" - 5755 Plus\n");
                if (BGE_IS_575X_PLUS(sc))
                        printf(" - 575X Plus\n");
                if (BGE_IS_5705_PLUS(sc))
                        printf(" - 5705 Plus\n");
                if (BGE_IS_5714_FAMILY(sc))
                        printf(" - 5714 Family\n");
                if (BGE_IS_5700_FAMILY(sc))
                        printf(" - 5700 Family\n");
                if (sc->bge_flags & BGE_FLAG_JUMBO)
                        printf(" - Supports Jumbo Frames\n");
                if (sc->bge_flags & BGE_FLAG_PCIX)
                        printf(" - PCI-X Bus\n");
                if (sc->bge_flags & BGE_FLAG_PCIE)
                        printf(" - PCI Express Bus\n");
                if (sc->bge_phy_flags & BGE_PHY_NO_3LED)
                        printf(" - No 3 LEDs\n");
                if (sc->bge_flags & BGE_FLAG_RX_ALIGNBUG)
                        printf(" - RX Alignment Bug\n");
        }

        return (error);
}

static int
bge_sysctl_reg_read(SYSCTL_HANDLER_ARGS)
{
        struct bge_softc *sc;
        int error;
        uint16_t result;
        uint32_t val;

        result = -1;
        error = sysctl_handle_int(oidp, &result, 0, req);
        if (error || (req->newptr == NULL))
                return (error);

        if (result < 0x8000) {
                sc = (struct bge_softc *)arg1;
                val = CSR_READ_4(sc, result);
                printf("reg 0x%06X = 0x%08X\n", result, val);
        }

        return (error);
}

static int
bge_sysctl_ape_read(SYSCTL_HANDLER_ARGS)
{
        struct bge_softc *sc;
        int error;
        uint16_t result;
        uint32_t val;

        result = -1;
        error = sysctl_handle_int(oidp, &result, 0, req);
        if (error || (req->newptr == NULL))
                return (error);

        if (result < 0x8000) {
                sc = (struct bge_softc *)arg1;
                val = APE_READ_4(sc, result);
                printf("reg 0x%06X = 0x%08X\n", result, val);
        }

        return (error);
}

static int
bge_sysctl_mem_read(SYSCTL_HANDLER_ARGS)
{
        struct bge_softc *sc;
        int error;
        uint16_t result;
        uint32_t val;

        result = -1;
        error = sysctl_handle_int(oidp, &result, 0, req);
        if (error || (req->newptr == NULL))
                return (error);

        if (result < 0x8000) {
                sc = (struct bge_softc *)arg1;
                val = bge_readmem_ind(sc, result);
                printf("mem 0x%06X = 0x%08X\n", result, val);
        }

        return (error);
}
#endif

static int
bge_get_eaddr_fw(struct bge_softc *sc, uint8_t ether_addr[])
{

        if (sc->bge_flags & BGE_FLAG_EADDR)
                return (1);

#ifdef __sparc64__
        OF_getetheraddr(sc->bge_dev, ether_addr);
        return (0);
#endif
        return (1);
}

static int
bge_get_eaddr_mem(struct bge_softc *sc, uint8_t ether_addr[])
{
        uint32_t mac_addr;

        mac_addr = bge_readmem_ind(sc, BGE_SRAM_MAC_ADDR_HIGH_MB);
        if ((mac_addr >> 16) == 0x484b) {
                ether_addr[0] = (uint8_t)(mac_addr >> 8);
                ether_addr[1] = (uint8_t)mac_addr;
                mac_addr = bge_readmem_ind(sc, BGE_SRAM_MAC_ADDR_LOW_MB);
                ether_addr[2] = (uint8_t)(mac_addr >> 24);
                ether_addr[3] = (uint8_t)(mac_addr >> 16);
                ether_addr[4] = (uint8_t)(mac_addr >> 8);
                ether_addr[5] = (uint8_t)mac_addr;
                return (0);
        }
        return (1);
}

static int
bge_get_eaddr_nvram(struct bge_softc *sc, uint8_t ether_addr[])
{
        int mac_offset = BGE_EE_MAC_OFFSET;

        if (sc->bge_asicrev == BGE_ASICREV_BCM5906)
                mac_offset = BGE_EE_MAC_OFFSET_5906;

        return (bge_read_nvram(sc, ether_addr, mac_offset + 2,
            ETHER_ADDR_LEN));
}

static int
bge_get_eaddr_eeprom(struct bge_softc *sc, uint8_t ether_addr[])
{

        if (sc->bge_asicrev == BGE_ASICREV_BCM5906)
                return (1);

        return (bge_read_eeprom(sc, ether_addr, BGE_EE_MAC_OFFSET + 2,
           ETHER_ADDR_LEN));
}

static int
bge_get_eaddr(struct bge_softc *sc, uint8_t eaddr[])
{
        static const bge_eaddr_fcn_t bge_eaddr_funcs[] = {
                /* NOTE: Order is critical */
                bge_get_eaddr_fw,
                bge_get_eaddr_mem,
                bge_get_eaddr_nvram,
                bge_get_eaddr_eeprom,
                NULL
        };
        const bge_eaddr_fcn_t *func;

        for (func = bge_eaddr_funcs; *func != NULL; ++func) {
                if ((*func)(sc, eaddr) == 0)
                        break;
        }
        return (*func == NULL ? ENXIO : 0);
}