2 * Copyright (c) 2014-2018, Matthew Macy <mmacy@mattmacy.io>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are met:
8 * 1. Redistributions of source code must retain the above copyright notice,
9 * this list of conditions and the following disclaimer.
11 * 2. Neither the name of Matthew Macy nor the names of its
12 * contributors may be used to endorse or promote products derived from
13 * this software without specific prior written permission.
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
16 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
19 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
20 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
21 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
22 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
23 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
24 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
25 * POSSIBILITY OF SUCH DAMAGE.
28 #include <sys/cdefs.h>
29 __FBSDID("$FreeBSD$");
32 #include "opt_inet6.h"
34 #include "opt_sched.h"
36 #include <sys/param.h>
37 #include <sys/types.h>
39 #include <sys/eventhandler.h>
40 #include <sys/kernel.h>
42 #include <sys/mutex.h>
43 #include <sys/module.h>
48 #include <sys/socket.h>
49 #include <sys/sockio.h>
50 #include <sys/sysctl.h>
51 #include <sys/syslog.h>
52 #include <sys/taskqueue.h>
53 #include <sys/limits.h>
56 #include <net/if_var.h>
57 #include <net/if_types.h>
58 #include <net/if_media.h>
60 #include <net/ethernet.h>
61 #include <net/mp_ring.h>
62 #include <net/debugnet.h>
66 #include <netinet/in.h>
67 #include <netinet/in_pcb.h>
68 #include <netinet/tcp_lro.h>
69 #include <netinet/in_systm.h>
70 #include <netinet/if_ether.h>
71 #include <netinet/ip.h>
72 #include <netinet/ip6.h>
73 #include <netinet/tcp.h>
74 #include <netinet/ip_var.h>
75 #include <netinet6/ip6_var.h>
77 #include <machine/bus.h>
78 #include <machine/in_cksum.h>
83 #include <dev/led/led.h>
84 #include <dev/pci/pcireg.h>
85 #include <dev/pci/pcivar.h>
86 #include <dev/pci/pci_private.h>
88 #include <net/iflib.h>
89 #include <net/iflib_private.h>
94 #include <dev/pci/pci_iov.h>
97 #include <sys/bitstring.h>
99 * enable accounting of every mbuf as it comes in to and goes out of
100 * iflib's software descriptor references
102 #define MEMORY_LOGGING 0
104 * Enable mbuf vectors for compressing long mbuf chains
109 * - Prefetching in tx cleaning should perhaps be a tunable. The distance ahead
110 * we prefetch needs to be determined by the time spent in m_free vis a vis
111 * the cost of a prefetch. This will of course vary based on the workload:
112 * - NFLX's m_free path is dominated by vm-based M_EXT manipulation which
113 * is quite expensive, thus suggesting very little prefetch.
114 * - small packet forwarding which is just returning a single mbuf to
115 * UMA will typically be very fast vis a vis the cost of a memory
122 * - private structures
123 * - iflib private utility functions
125 * - vlan registry and other exported functions
126 * - iflib public core functions
130 MALLOC_DEFINE(M_IFLIB, "iflib", "ifnet library");
132 #define IFLIB_RXEOF_MORE (1U << 0)
133 #define IFLIB_RXEOF_EMPTY (2U << 0)
136 typedef struct iflib_txq *iflib_txq_t;
138 typedef struct iflib_rxq *iflib_rxq_t;
140 typedef struct iflib_fl *iflib_fl_t;
144 static void iru_init(if_rxd_update_t iru, iflib_rxq_t rxq, uint8_t flid);
145 static void iflib_timer(void *arg);
147 typedef struct iflib_filter_info {
148 driver_filter_t *ifi_filter;
149 void *ifi_filter_arg;
150 struct grouptask *ifi_task;
152 } *iflib_filter_info_t;
157 * Pointer to hardware driver's softc
164 if_shared_ctx_t ifc_sctx;
165 struct if_softc_ctx ifc_softc_ctx;
167 struct sx ifc_ctx_sx;
168 struct mtx ifc_state_mtx;
170 iflib_txq_t ifc_txqs;
171 iflib_rxq_t ifc_rxqs;
172 uint32_t ifc_if_flags;
174 uint32_t ifc_max_fl_buf_size;
175 uint32_t ifc_rx_mbuf_sz;
178 int ifc_watchdog_events;
179 struct cdev *ifc_led_dev;
180 struct resource *ifc_msix_mem;
182 struct if_irq ifc_legacy_irq;
183 struct grouptask ifc_admin_task;
184 struct grouptask ifc_vflr_task;
185 struct iflib_filter_info ifc_filter_info;
186 struct ifmedia ifc_media;
187 struct ifmedia *ifc_mediap;
189 struct sysctl_oid *ifc_sysctl_node;
190 uint16_t ifc_sysctl_ntxqs;
191 uint16_t ifc_sysctl_nrxqs;
192 uint16_t ifc_sysctl_qs_eq_override;
193 uint16_t ifc_sysctl_rx_budget;
194 uint16_t ifc_sysctl_tx_abdicate;
195 uint16_t ifc_sysctl_core_offset;
196 #define CORE_OFFSET_UNSPECIFIED 0xffff
197 uint8_t ifc_sysctl_separate_txrx;
199 qidx_t ifc_sysctl_ntxds[8];
200 qidx_t ifc_sysctl_nrxds[8];
201 struct if_txrx ifc_txrx;
202 #define isc_txd_encap ifc_txrx.ift_txd_encap
203 #define isc_txd_flush ifc_txrx.ift_txd_flush
204 #define isc_txd_credits_update ifc_txrx.ift_txd_credits_update
205 #define isc_rxd_available ifc_txrx.ift_rxd_available
206 #define isc_rxd_pkt_get ifc_txrx.ift_rxd_pkt_get
207 #define isc_rxd_refill ifc_txrx.ift_rxd_refill
208 #define isc_rxd_flush ifc_txrx.ift_rxd_flush
209 #define isc_rxd_refill ifc_txrx.ift_rxd_refill
210 #define isc_rxd_refill ifc_txrx.ift_rxd_refill
211 #define isc_legacy_intr ifc_txrx.ift_legacy_intr
212 eventhandler_tag ifc_vlan_attach_event;
213 eventhandler_tag ifc_vlan_detach_event;
214 struct ether_addr ifc_mac;
218 iflib_get_softc(if_ctx_t ctx)
221 return (ctx->ifc_softc);
225 iflib_get_dev(if_ctx_t ctx)
228 return (ctx->ifc_dev);
232 iflib_get_ifp(if_ctx_t ctx)
235 return (ctx->ifc_ifp);
239 iflib_get_media(if_ctx_t ctx)
242 return (ctx->ifc_mediap);
246 iflib_get_flags(if_ctx_t ctx)
248 return (ctx->ifc_flags);
252 iflib_set_mac(if_ctx_t ctx, uint8_t mac[ETHER_ADDR_LEN])
255 bcopy(mac, ctx->ifc_mac.octet, ETHER_ADDR_LEN);
259 iflib_get_softc_ctx(if_ctx_t ctx)
262 return (&ctx->ifc_softc_ctx);
266 iflib_get_sctx(if_ctx_t ctx)
269 return (ctx->ifc_sctx);
272 #define IP_ALIGNED(m) ((((uintptr_t)(m)->m_data) & 0x3) == 0x2)
273 #define CACHE_PTR_INCREMENT (CACHE_LINE_SIZE/sizeof(void*))
274 #define CACHE_PTR_NEXT(ptr) ((void *)(((uintptr_t)(ptr)+CACHE_LINE_SIZE-1) & (CACHE_LINE_SIZE-1)))
276 #define LINK_ACTIVE(ctx) ((ctx)->ifc_link_state == LINK_STATE_UP)
277 #define CTX_IS_VF(ctx) ((ctx)->ifc_sctx->isc_flags & IFLIB_IS_VF)
279 typedef struct iflib_sw_rx_desc_array {
280 bus_dmamap_t *ifsd_map; /* bus_dma maps for packet */
281 struct mbuf **ifsd_m; /* pkthdr mbufs */
282 caddr_t *ifsd_cl; /* direct cluster pointer for rx */
283 bus_addr_t *ifsd_ba; /* bus addr of cluster for rx */
284 } iflib_rxsd_array_t;
286 typedef struct iflib_sw_tx_desc_array {
287 bus_dmamap_t *ifsd_map; /* bus_dma maps for packet */
288 bus_dmamap_t *ifsd_tso_map; /* bus_dma maps for TSO packet */
289 struct mbuf **ifsd_m; /* pkthdr mbufs */
292 /* magic number that should be high enough for any hardware */
293 #define IFLIB_MAX_TX_SEGS 128
294 #define IFLIB_RX_COPY_THRESH 128
295 #define IFLIB_MAX_RX_REFRESH 32
296 /* The minimum descriptors per second before we start coalescing */
297 #define IFLIB_MIN_DESC_SEC 16384
298 #define IFLIB_DEFAULT_TX_UPDATE_FREQ 16
299 #define IFLIB_QUEUE_IDLE 0
300 #define IFLIB_QUEUE_HUNG 1
301 #define IFLIB_QUEUE_WORKING 2
302 /* maximum number of txqs that can share an rx interrupt */
303 #define IFLIB_MAX_TX_SHARED_INTR 4
305 /* this should really scale with ring size - this is a fairly arbitrary value */
306 #define TX_BATCH_SIZE 32
308 #define IFLIB_RESTART_BUDGET 8
310 #define CSUM_OFFLOAD (CSUM_IP_TSO|CSUM_IP6_TSO|CSUM_IP| \
311 CSUM_IP_UDP|CSUM_IP_TCP|CSUM_IP_SCTP| \
312 CSUM_IP6_UDP|CSUM_IP6_TCP|CSUM_IP6_SCTP)
317 qidx_t ift_cidx_processed;
320 uint8_t ift_br_offset;
321 uint16_t ift_npending;
322 uint16_t ift_db_pending;
323 uint16_t ift_rs_pending;
325 uint8_t ift_txd_size[8];
326 uint64_t ift_processed;
327 uint64_t ift_cleaned;
328 uint64_t ift_cleaned_prev;
330 uint64_t ift_enqueued;
331 uint64_t ift_dequeued;
333 uint64_t ift_no_tx_dma_setup;
334 uint64_t ift_no_desc_avail;
335 uint64_t ift_mbuf_defrag_failed;
336 uint64_t ift_mbuf_defrag;
337 uint64_t ift_map_failed;
338 uint64_t ift_txd_encap_efbig;
339 uint64_t ift_pullups;
340 uint64_t ift_last_timer_tick;
343 struct mtx ift_db_mtx;
345 /* constant values */
347 struct ifmp_ring *ift_br;
348 struct grouptask ift_task;
351 struct callout ift_timer;
353 if_txsd_vec_t ift_sds;
356 uint8_t ift_update_freq;
357 struct iflib_filter_info ift_filter_info;
358 bus_dma_tag_t ift_buf_tag;
359 bus_dma_tag_t ift_tso_buf_tag;
360 iflib_dma_info_t ift_ifdi;
361 #define MTX_NAME_LEN 16
362 char ift_mtx_name[MTX_NAME_LEN];
363 bus_dma_segment_t ift_segs[IFLIB_MAX_TX_SEGS] __aligned(CACHE_LINE_SIZE);
364 #ifdef IFLIB_DIAGNOSTICS
365 uint64_t ift_cpu_exec_count[256];
367 } __aligned(CACHE_LINE_SIZE);
374 uint8_t ifl_rxd_size;
376 uint64_t ifl_m_enqueued;
377 uint64_t ifl_m_dequeued;
378 uint64_t ifl_cl_enqueued;
379 uint64_t ifl_cl_dequeued;
382 bitstr_t *ifl_rx_bitmap;
386 uint16_t ifl_buf_size;
389 iflib_rxsd_array_t ifl_sds;
392 bus_dma_tag_t ifl_buf_tag;
393 iflib_dma_info_t ifl_ifdi;
394 uint64_t ifl_bus_addrs[IFLIB_MAX_RX_REFRESH] __aligned(CACHE_LINE_SIZE);
395 caddr_t ifl_vm_addrs[IFLIB_MAX_RX_REFRESH];
396 qidx_t ifl_rxd_idxs[IFLIB_MAX_RX_REFRESH];
397 } __aligned(CACHE_LINE_SIZE);
400 get_inuse(int size, qidx_t cidx, qidx_t pidx, uint8_t gen)
406 else if (pidx < cidx)
407 used = size - cidx + pidx;
408 else if (gen == 0 && pidx == cidx)
410 else if (gen == 1 && pidx == cidx)
418 #define TXQ_AVAIL(txq) (txq->ift_size - get_inuse(txq->ift_size, txq->ift_cidx, txq->ift_pidx, txq->ift_gen))
420 #define IDXDIFF(head, tail, wrap) \
421 ((head) >= (tail) ? (head) - (tail) : (wrap) - (tail) + (head))
427 struct pfil_head *pfil;
429 * If there is a separate completion queue (IFLIB_HAS_RXCQ), this is
430 * the command queue consumer index. Otherwise it's unused.
436 uint8_t ifr_txqid[IFLIB_MAX_TX_SHARED_INTR];
437 uint8_t ifr_fl_offset;
438 struct lro_ctrl ifr_lc;
439 struct grouptask ifr_task;
440 struct callout ifr_watchdog;
441 struct iflib_filter_info ifr_filter_info;
442 iflib_dma_info_t ifr_ifdi;
444 /* dynamically allocate if any drivers need a value substantially larger than this */
445 struct if_rxd_frag ifr_frags[IFLIB_MAX_RX_SEGS] __aligned(CACHE_LINE_SIZE);
446 #ifdef IFLIB_DIAGNOSTICS
447 uint64_t ifr_cpu_exec_count[256];
449 } __aligned(CACHE_LINE_SIZE);
451 typedef struct if_rxsd {
456 /* multiple of word size */
458 #define PKT_INFO_SIZE 6
459 #define RXD_INFO_SIZE 5
460 #define PKT_TYPE uint64_t
462 #define PKT_INFO_SIZE 11
463 #define RXD_INFO_SIZE 8
464 #define PKT_TYPE uint32_t
466 #define PKT_LOOP_BOUND ((PKT_INFO_SIZE/3)*3)
467 #define RXD_LOOP_BOUND ((RXD_INFO_SIZE/4)*4)
469 typedef struct if_pkt_info_pad {
470 PKT_TYPE pkt_val[PKT_INFO_SIZE];
471 } *if_pkt_info_pad_t;
472 typedef struct if_rxd_info_pad {
473 PKT_TYPE rxd_val[RXD_INFO_SIZE];
474 } *if_rxd_info_pad_t;
476 CTASSERT(sizeof(struct if_pkt_info_pad) == sizeof(struct if_pkt_info));
477 CTASSERT(sizeof(struct if_rxd_info_pad) == sizeof(struct if_rxd_info));
481 pkt_info_zero(if_pkt_info_t pi)
483 if_pkt_info_pad_t pi_pad;
485 pi_pad = (if_pkt_info_pad_t)pi;
486 pi_pad->pkt_val[0] = 0; pi_pad->pkt_val[1] = 0; pi_pad->pkt_val[2] = 0;
487 pi_pad->pkt_val[3] = 0; pi_pad->pkt_val[4] = 0; pi_pad->pkt_val[5] = 0;
489 pi_pad->pkt_val[6] = 0; pi_pad->pkt_val[7] = 0; pi_pad->pkt_val[8] = 0;
490 pi_pad->pkt_val[9] = 0; pi_pad->pkt_val[10] = 0;
494 static device_method_t iflib_pseudo_methods[] = {
495 DEVMETHOD(device_attach, noop_attach),
496 DEVMETHOD(device_detach, iflib_pseudo_detach),
500 driver_t iflib_pseudodriver = {
501 "iflib_pseudo", iflib_pseudo_methods, sizeof(struct iflib_ctx),
505 rxd_info_zero(if_rxd_info_t ri)
507 if_rxd_info_pad_t ri_pad;
510 ri_pad = (if_rxd_info_pad_t)ri;
511 for (i = 0; i < RXD_LOOP_BOUND; i += 4) {
512 ri_pad->rxd_val[i] = 0;
513 ri_pad->rxd_val[i+1] = 0;
514 ri_pad->rxd_val[i+2] = 0;
515 ri_pad->rxd_val[i+3] = 0;
518 ri_pad->rxd_val[RXD_INFO_SIZE-1] = 0;
523 * Only allow a single packet to take up most 1/nth of the tx ring
525 #define MAX_SINGLE_PACKET_FRACTION 12
526 #define IF_BAD_DMA (bus_addr_t)-1
528 #define CTX_ACTIVE(ctx) ((if_getdrvflags((ctx)->ifc_ifp) & IFF_DRV_RUNNING))
530 #define CTX_LOCK_INIT(_sc) sx_init(&(_sc)->ifc_ctx_sx, "iflib ctx lock")
531 #define CTX_LOCK(ctx) sx_xlock(&(ctx)->ifc_ctx_sx)
532 #define CTX_UNLOCK(ctx) sx_xunlock(&(ctx)->ifc_ctx_sx)
533 #define CTX_LOCK_DESTROY(ctx) sx_destroy(&(ctx)->ifc_ctx_sx)
535 #define STATE_LOCK_INIT(_sc, _name) mtx_init(&(_sc)->ifc_state_mtx, _name, "iflib state lock", MTX_DEF)
536 #define STATE_LOCK(ctx) mtx_lock(&(ctx)->ifc_state_mtx)
537 #define STATE_UNLOCK(ctx) mtx_unlock(&(ctx)->ifc_state_mtx)
538 #define STATE_LOCK_DESTROY(ctx) mtx_destroy(&(ctx)->ifc_state_mtx)
540 #define CALLOUT_LOCK(txq) mtx_lock(&txq->ift_mtx)
541 #define CALLOUT_UNLOCK(txq) mtx_unlock(&txq->ift_mtx)
544 iflib_set_detach(if_ctx_t ctx)
547 ctx->ifc_flags |= IFC_IN_DETACH;
551 /* Our boot-time initialization hook */
552 static int iflib_module_event_handler(module_t, int, void *);
554 static moduledata_t iflib_moduledata = {
556 iflib_module_event_handler,
560 DECLARE_MODULE(iflib, iflib_moduledata, SI_SUB_INIT_IF, SI_ORDER_ANY);
561 MODULE_VERSION(iflib, 1);
563 MODULE_DEPEND(iflib, pci, 1, 1, 1);
564 MODULE_DEPEND(iflib, ether, 1, 1, 1);
566 TASKQGROUP_DEFINE(if_io_tqg, mp_ncpus, 1);
567 TASKQGROUP_DEFINE(if_config_tqg, 1, 1);
569 #ifndef IFLIB_DEBUG_COUNTERS
571 #define IFLIB_DEBUG_COUNTERS 1
573 #define IFLIB_DEBUG_COUNTERS 0
574 #endif /* !INVARIANTS */
577 static SYSCTL_NODE(_net, OID_AUTO, iflib, CTLFLAG_RD | CTLFLAG_MPSAFE, 0,
578 "iflib driver parameters");
581 * XXX need to ensure that this can't accidentally cause the head to be moved backwards
583 static int iflib_min_tx_latency = 0;
584 SYSCTL_INT(_net_iflib, OID_AUTO, min_tx_latency, CTLFLAG_RW,
585 &iflib_min_tx_latency, 0, "minimize transmit latency at the possible expense of throughput");
586 static int iflib_no_tx_batch = 0;
587 SYSCTL_INT(_net_iflib, OID_AUTO, no_tx_batch, CTLFLAG_RW,
588 &iflib_no_tx_batch, 0, "minimize transmit latency at the possible expense of throughput");
591 #if IFLIB_DEBUG_COUNTERS
593 static int iflib_tx_seen;
594 static int iflib_tx_sent;
595 static int iflib_tx_encap;
596 static int iflib_rx_allocs;
597 static int iflib_fl_refills;
598 static int iflib_fl_refills_large;
599 static int iflib_tx_frees;
601 SYSCTL_INT(_net_iflib, OID_AUTO, tx_seen, CTLFLAG_RD,
602 &iflib_tx_seen, 0, "# TX mbufs seen");
603 SYSCTL_INT(_net_iflib, OID_AUTO, tx_sent, CTLFLAG_RD,
604 &iflib_tx_sent, 0, "# TX mbufs sent");
605 SYSCTL_INT(_net_iflib, OID_AUTO, tx_encap, CTLFLAG_RD,
606 &iflib_tx_encap, 0, "# TX mbufs encapped");
607 SYSCTL_INT(_net_iflib, OID_AUTO, tx_frees, CTLFLAG_RD,
608 &iflib_tx_frees, 0, "# TX frees");
609 SYSCTL_INT(_net_iflib, OID_AUTO, rx_allocs, CTLFLAG_RD,
610 &iflib_rx_allocs, 0, "# RX allocations");
611 SYSCTL_INT(_net_iflib, OID_AUTO, fl_refills, CTLFLAG_RD,
612 &iflib_fl_refills, 0, "# refills");
613 SYSCTL_INT(_net_iflib, OID_AUTO, fl_refills_large, CTLFLAG_RD,
614 &iflib_fl_refills_large, 0, "# large refills");
617 static int iflib_txq_drain_flushing;
618 static int iflib_txq_drain_oactive;
619 static int iflib_txq_drain_notready;
621 SYSCTL_INT(_net_iflib, OID_AUTO, txq_drain_flushing, CTLFLAG_RD,
622 &iflib_txq_drain_flushing, 0, "# drain flushes");
623 SYSCTL_INT(_net_iflib, OID_AUTO, txq_drain_oactive, CTLFLAG_RD,
624 &iflib_txq_drain_oactive, 0, "# drain oactives");
625 SYSCTL_INT(_net_iflib, OID_AUTO, txq_drain_notready, CTLFLAG_RD,
626 &iflib_txq_drain_notready, 0, "# drain notready");
629 static int iflib_encap_load_mbuf_fail;
630 static int iflib_encap_pad_mbuf_fail;
631 static int iflib_encap_txq_avail_fail;
632 static int iflib_encap_txd_encap_fail;
634 SYSCTL_INT(_net_iflib, OID_AUTO, encap_load_mbuf_fail, CTLFLAG_RD,
635 &iflib_encap_load_mbuf_fail, 0, "# busdma load failures");
636 SYSCTL_INT(_net_iflib, OID_AUTO, encap_pad_mbuf_fail, CTLFLAG_RD,
637 &iflib_encap_pad_mbuf_fail, 0, "# runt frame pad failures");
638 SYSCTL_INT(_net_iflib, OID_AUTO, encap_txq_avail_fail, CTLFLAG_RD,
639 &iflib_encap_txq_avail_fail, 0, "# txq avail failures");
640 SYSCTL_INT(_net_iflib, OID_AUTO, encap_txd_encap_fail, CTLFLAG_RD,
641 &iflib_encap_txd_encap_fail, 0, "# driver encap failures");
643 static int iflib_task_fn_rxs;
644 static int iflib_rx_intr_enables;
645 static int iflib_fast_intrs;
646 static int iflib_rx_unavail;
647 static int iflib_rx_ctx_inactive;
648 static int iflib_rx_if_input;
649 static int iflib_rxd_flush;
651 static int iflib_verbose_debug;
653 SYSCTL_INT(_net_iflib, OID_AUTO, task_fn_rx, CTLFLAG_RD,
654 &iflib_task_fn_rxs, 0, "# task_fn_rx calls");
655 SYSCTL_INT(_net_iflib, OID_AUTO, rx_intr_enables, CTLFLAG_RD,
656 &iflib_rx_intr_enables, 0, "# RX intr enables");
657 SYSCTL_INT(_net_iflib, OID_AUTO, fast_intrs, CTLFLAG_RD,
658 &iflib_fast_intrs, 0, "# fast_intr calls");
659 SYSCTL_INT(_net_iflib, OID_AUTO, rx_unavail, CTLFLAG_RD,
660 &iflib_rx_unavail, 0, "# times rxeof called with no available data");
661 SYSCTL_INT(_net_iflib, OID_AUTO, rx_ctx_inactive, CTLFLAG_RD,
662 &iflib_rx_ctx_inactive, 0, "# times rxeof called with inactive context");
663 SYSCTL_INT(_net_iflib, OID_AUTO, rx_if_input, CTLFLAG_RD,
664 &iflib_rx_if_input, 0, "# times rxeof called if_input");
665 SYSCTL_INT(_net_iflib, OID_AUTO, rxd_flush, CTLFLAG_RD,
666 &iflib_rxd_flush, 0, "# times rxd_flush called");
667 SYSCTL_INT(_net_iflib, OID_AUTO, verbose_debug, CTLFLAG_RW,
668 &iflib_verbose_debug, 0, "enable verbose debugging");
670 #define DBG_COUNTER_INC(name) atomic_add_int(&(iflib_ ## name), 1)
672 iflib_debug_reset(void)
674 iflib_tx_seen = iflib_tx_sent = iflib_tx_encap = iflib_rx_allocs =
675 iflib_fl_refills = iflib_fl_refills_large = iflib_tx_frees =
676 iflib_txq_drain_flushing = iflib_txq_drain_oactive =
677 iflib_txq_drain_notready =
678 iflib_encap_load_mbuf_fail = iflib_encap_pad_mbuf_fail =
679 iflib_encap_txq_avail_fail = iflib_encap_txd_encap_fail =
680 iflib_task_fn_rxs = iflib_rx_intr_enables = iflib_fast_intrs =
682 iflib_rx_ctx_inactive = iflib_rx_if_input =
687 #define DBG_COUNTER_INC(name)
688 static void iflib_debug_reset(void) {}
691 #define IFLIB_DEBUG 0
693 static void iflib_tx_structures_free(if_ctx_t ctx);
694 static void iflib_rx_structures_free(if_ctx_t ctx);
695 static int iflib_queues_alloc(if_ctx_t ctx);
696 static int iflib_tx_credits_update(if_ctx_t ctx, iflib_txq_t txq);
697 static int iflib_rxd_avail(if_ctx_t ctx, iflib_rxq_t rxq, qidx_t cidx, qidx_t budget);
698 static int iflib_qset_structures_setup(if_ctx_t ctx);
699 static int iflib_msix_init(if_ctx_t ctx);
700 static int iflib_legacy_setup(if_ctx_t ctx, driver_filter_t filter, void *filterarg, int *rid, const char *str);
701 static void iflib_txq_check_drain(iflib_txq_t txq, int budget);
702 static uint32_t iflib_txq_can_drain(struct ifmp_ring *);
704 static void iflib_altq_if_start(if_t ifp);
705 static int iflib_altq_if_transmit(if_t ifp, struct mbuf *m);
707 static int iflib_register(if_ctx_t);
708 static void iflib_deregister(if_ctx_t);
709 static void iflib_unregister_vlan_handlers(if_ctx_t ctx);
710 static uint16_t iflib_get_mbuf_size_for(unsigned int size);
711 static void iflib_init_locked(if_ctx_t ctx);
712 static void iflib_add_device_sysctl_pre(if_ctx_t ctx);
713 static void iflib_add_device_sysctl_post(if_ctx_t ctx);
714 static void iflib_ifmp_purge(iflib_txq_t txq);
715 static void _iflib_pre_assert(if_softc_ctx_t scctx);
716 static void iflib_if_init_locked(if_ctx_t ctx);
717 static void iflib_free_intr_mem(if_ctx_t ctx);
718 #ifndef __NO_STRICT_ALIGNMENT
719 static struct mbuf * iflib_fixup_rx(struct mbuf *m);
722 static SLIST_HEAD(cpu_offset_list, cpu_offset) cpu_offsets =
723 SLIST_HEAD_INITIALIZER(cpu_offsets);
725 SLIST_ENTRY(cpu_offset) entries;
727 unsigned int refcount;
730 static struct mtx cpu_offset_mtx;
731 MTX_SYSINIT(iflib_cpu_offset, &cpu_offset_mtx, "iflib_cpu_offset lock",
734 DEBUGNET_DEFINE(iflib);
737 #include <sys/selinfo.h>
738 #include <net/netmap.h>
739 #include <dev/netmap/netmap_kern.h>
741 MODULE_DEPEND(iflib, netmap, 1, 1, 1);
743 static int netmap_fl_refill(iflib_rxq_t rxq, struct netmap_kring *kring, uint32_t nm_i, bool init);
746 * device-specific sysctl variables:
748 * iflib_crcstrip: 0: keep CRC in rx frames (default), 1: strip it.
749 * During regular operations the CRC is stripped, but on some
750 * hardware reception of frames not multiple of 64 is slower,
751 * so using crcstrip=0 helps in benchmarks.
753 * iflib_rx_miss, iflib_rx_miss_bufs:
754 * count packets that might be missed due to lost interrupts.
756 SYSCTL_DECL(_dev_netmap);
758 * The xl driver by default strips CRCs and we do not override it.
761 int iflib_crcstrip = 1;
762 SYSCTL_INT(_dev_netmap, OID_AUTO, iflib_crcstrip,
763 CTLFLAG_RW, &iflib_crcstrip, 1, "strip CRC on RX frames");
765 int iflib_rx_miss, iflib_rx_miss_bufs;
766 SYSCTL_INT(_dev_netmap, OID_AUTO, iflib_rx_miss,
767 CTLFLAG_RW, &iflib_rx_miss, 0, "potentially missed RX intr");
768 SYSCTL_INT(_dev_netmap, OID_AUTO, iflib_rx_miss_bufs,
769 CTLFLAG_RW, &iflib_rx_miss_bufs, 0, "potentially missed RX intr bufs");
772 * Register/unregister. We are already under netmap lock.
773 * Only called on the first register or the last unregister.
776 iflib_netmap_register(struct netmap_adapter *na, int onoff)
779 if_ctx_t ctx = ifp->if_softc;
783 IFDI_INTR_DISABLE(ctx);
785 /* Tell the stack that the interface is no longer active */
786 ifp->if_drv_flags &= ~(IFF_DRV_RUNNING | IFF_DRV_OACTIVE);
789 IFDI_CRCSTRIP_SET(ctx, onoff, iflib_crcstrip);
791 /* enable or disable flags and callbacks in na and ifp */
793 nm_set_native_flags(na);
795 nm_clear_native_flags(na);
798 iflib_init_locked(ctx);
799 IFDI_CRCSTRIP_SET(ctx, onoff, iflib_crcstrip); // XXX why twice ?
800 status = ifp->if_drv_flags & IFF_DRV_RUNNING ? 0 : 1;
802 nm_clear_native_flags(na);
808 netmap_fl_refill(iflib_rxq_t rxq, struct netmap_kring *kring, uint32_t nm_i, bool init)
810 struct netmap_adapter *na = kring->na;
811 u_int const lim = kring->nkr_num_slots - 1;
812 u_int head = kring->rhead;
813 struct netmap_ring *ring = kring->ring;
815 struct if_rxd_update iru;
816 if_ctx_t ctx = rxq->ifr_ctx;
817 iflib_fl_t fl = &rxq->ifr_fl[0];
818 uint32_t refill_pidx, nic_i;
819 #if IFLIB_DEBUG_COUNTERS
823 if (nm_i == head && __predict_true(!init))
825 iru_init(&iru, rxq, 0 /* flid */);
826 map = fl->ifl_sds.ifsd_map;
827 refill_pidx = netmap_idx_k2n(kring, nm_i);
829 * IMPORTANT: we must leave one free slot in the ring,
830 * so move head back by one unit
832 head = nm_prev(head, lim);
834 DBG_COUNTER_INC(fl_refills);
835 while (nm_i != head) {
836 #if IFLIB_DEBUG_COUNTERS
838 DBG_COUNTER_INC(fl_refills_large);
840 for (int tmp_pidx = 0; tmp_pidx < IFLIB_MAX_RX_REFRESH && nm_i != head; tmp_pidx++) {
841 struct netmap_slot *slot = &ring->slot[nm_i];
842 void *addr = PNMB(na, slot, &fl->ifl_bus_addrs[tmp_pidx]);
843 uint32_t nic_i_dma = refill_pidx;
844 nic_i = netmap_idx_k2n(kring, nm_i);
846 MPASS(tmp_pidx < IFLIB_MAX_RX_REFRESH);
848 if (addr == NETMAP_BUF_BASE(na)) /* bad buf */
849 return netmap_ring_reinit(kring);
851 fl->ifl_vm_addrs[tmp_pidx] = addr;
852 if (__predict_false(init)) {
853 netmap_load_map(na, fl->ifl_buf_tag,
855 } else if (slot->flags & NS_BUF_CHANGED) {
856 /* buffer has changed, reload map */
857 netmap_reload_map(na, fl->ifl_buf_tag,
860 slot->flags &= ~NS_BUF_CHANGED;
862 nm_i = nm_next(nm_i, lim);
863 fl->ifl_rxd_idxs[tmp_pidx] = nic_i = nm_next(nic_i, lim);
864 if (nm_i != head && tmp_pidx < IFLIB_MAX_RX_REFRESH-1)
867 iru.iru_pidx = refill_pidx;
868 iru.iru_count = tmp_pidx+1;
869 ctx->isc_rxd_refill(ctx->ifc_softc, &iru);
871 for (int n = 0; n < iru.iru_count; n++) {
872 bus_dmamap_sync(fl->ifl_buf_tag, map[nic_i_dma],
873 BUS_DMASYNC_PREREAD);
874 /* XXX - change this to not use the netmap func*/
875 nic_i_dma = nm_next(nic_i_dma, lim);
879 kring->nr_hwcur = head;
881 bus_dmamap_sync(fl->ifl_ifdi->idi_tag, fl->ifl_ifdi->idi_map,
882 BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
883 if (__predict_true(nic_i != UINT_MAX)) {
884 ctx->isc_rxd_flush(ctx->ifc_softc, rxq->ifr_id, fl->ifl_id, nic_i);
885 DBG_COUNTER_INC(rxd_flush);
891 * Reconcile kernel and user view of the transmit ring.
893 * All information is in the kring.
894 * Userspace wants to send packets up to the one before kring->rhead,
895 * kernel knows kring->nr_hwcur is the first unsent packet.
897 * Here we push packets out (as many as possible), and possibly
898 * reclaim buffers from previously completed transmission.
900 * The caller (netmap) guarantees that there is only one instance
901 * running at any time. Any interference with other driver
902 * methods should be handled by the individual drivers.
905 iflib_netmap_txsync(struct netmap_kring *kring, int flags)
907 struct netmap_adapter *na = kring->na;
909 struct netmap_ring *ring = kring->ring;
910 u_int nm_i; /* index into the netmap kring */
911 u_int nic_i; /* index into the NIC ring */
913 u_int const lim = kring->nkr_num_slots - 1;
914 u_int const head = kring->rhead;
915 struct if_pkt_info pi;
918 * interrupts on every tx packet are expensive so request
919 * them every half ring, or where NS_REPORT is set
921 u_int report_frequency = kring->nkr_num_slots >> 1;
922 /* device-specific */
923 if_ctx_t ctx = ifp->if_softc;
924 iflib_txq_t txq = &ctx->ifc_txqs[kring->ring_id];
926 bus_dmamap_sync(txq->ift_ifdi->idi_tag, txq->ift_ifdi->idi_map,
927 BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE);
930 * First part: process new packets to send.
931 * nm_i is the current index in the netmap kring,
932 * nic_i is the corresponding index in the NIC ring.
934 * If we have packets to send (nm_i != head)
935 * iterate over the netmap ring, fetch length and update
936 * the corresponding slot in the NIC ring. Some drivers also
937 * need to update the buffer's physical address in the NIC slot
938 * even NS_BUF_CHANGED is not set (PNMB computes the addresses).
940 * The netmap_reload_map() calls is especially expensive,
941 * even when (as in this case) the tag is 0, so do only
942 * when the buffer has actually changed.
944 * If possible do not set the report/intr bit on all slots,
945 * but only a few times per ring or when NS_REPORT is set.
947 * Finally, on 10G and faster drivers, it might be useful
948 * to prefetch the next slot and txr entry.
951 nm_i = kring->nr_hwcur;
952 if (nm_i != head) { /* we have new packets to send */
954 pi.ipi_segs = txq->ift_segs;
955 pi.ipi_qsidx = kring->ring_id;
956 nic_i = netmap_idx_k2n(kring, nm_i);
958 __builtin_prefetch(&ring->slot[nm_i]);
959 __builtin_prefetch(&txq->ift_sds.ifsd_m[nic_i]);
960 __builtin_prefetch(&txq->ift_sds.ifsd_map[nic_i]);
962 for (n = 0; nm_i != head; n++) {
963 struct netmap_slot *slot = &ring->slot[nm_i];
964 u_int len = slot->len;
966 void *addr = PNMB(na, slot, &paddr);
967 int flags = (slot->flags & NS_REPORT ||
968 nic_i == 0 || nic_i == report_frequency) ?
971 /* device-specific */
973 pi.ipi_segs[0].ds_addr = paddr;
974 pi.ipi_segs[0].ds_len = len;
978 pi.ipi_flags = flags;
980 /* Fill the slot in the NIC ring. */
981 ctx->isc_txd_encap(ctx->ifc_softc, &pi);
982 DBG_COUNTER_INC(tx_encap);
984 /* prefetch for next round */
985 __builtin_prefetch(&ring->slot[nm_i + 1]);
986 __builtin_prefetch(&txq->ift_sds.ifsd_m[nic_i + 1]);
987 __builtin_prefetch(&txq->ift_sds.ifsd_map[nic_i + 1]);
989 NM_CHECK_ADDR_LEN(na, addr, len);
991 if (slot->flags & NS_BUF_CHANGED) {
992 /* buffer has changed, reload map */
993 netmap_reload_map(na, txq->ift_buf_tag,
994 txq->ift_sds.ifsd_map[nic_i], addr);
996 /* make sure changes to the buffer are synced */
997 bus_dmamap_sync(txq->ift_buf_tag,
998 txq->ift_sds.ifsd_map[nic_i],
999 BUS_DMASYNC_PREWRITE);
1001 slot->flags &= ~(NS_REPORT | NS_BUF_CHANGED);
1002 nm_i = nm_next(nm_i, lim);
1003 nic_i = nm_next(nic_i, lim);
1005 kring->nr_hwcur = nm_i;
1007 /* synchronize the NIC ring */
1008 bus_dmamap_sync(txq->ift_ifdi->idi_tag, txq->ift_ifdi->idi_map,
1009 BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
1011 /* (re)start the tx unit up to slot nic_i (excluded) */
1012 ctx->isc_txd_flush(ctx->ifc_softc, txq->ift_id, nic_i);
1016 * Second part: reclaim buffers for completed transmissions.
1018 * If there are unclaimed buffers, attempt to reclaim them.
1019 * If none are reclaimed, and TX IRQs are not in use, do an initial
1020 * minimal delay, then trigger the tx handler which will spin in the
1023 if (kring->nr_hwtail != nm_prev(kring->nr_hwcur, lim)) {
1024 if (iflib_tx_credits_update(ctx, txq)) {
1025 /* some tx completed, increment avail */
1026 nic_i = txq->ift_cidx_processed;
1027 kring->nr_hwtail = nm_prev(netmap_idx_n2k(kring, nic_i), lim);
1030 if (!(ctx->ifc_flags & IFC_NETMAP_TX_IRQ))
1031 if (kring->nr_hwtail != nm_prev(kring->nr_hwcur, lim)) {
1032 callout_reset_on(&txq->ift_timer, hz < 2000 ? 1 : hz / 1000,
1033 iflib_timer, txq, txq->ift_timer.c_cpu);
1039 * Reconcile kernel and user view of the receive ring.
1040 * Same as for the txsync, this routine must be efficient.
1041 * The caller guarantees a single invocations, but races against
1042 * the rest of the driver should be handled here.
1044 * On call, kring->rhead is the first packet that userspace wants
1045 * to keep, and kring->rcur is the wakeup point.
1046 * The kernel has previously reported packets up to kring->rtail.
1048 * If (flags & NAF_FORCE_READ) also check for incoming packets irrespective
1049 * of whether or not we received an interrupt.
1052 iflib_netmap_rxsync(struct netmap_kring *kring, int flags)
1054 struct netmap_adapter *na = kring->na;
1055 struct netmap_ring *ring = kring->ring;
1058 uint32_t nm_i; /* index into the netmap ring */
1059 uint32_t nic_i; /* index into the NIC ring */
1061 u_int const lim = kring->nkr_num_slots - 1;
1062 u_int const head = kring->rhead;
1063 int force_update = (flags & NAF_FORCE_READ) || kring->nr_kflags & NKR_PENDINTR;
1064 struct if_rxd_info ri;
1066 if_ctx_t ctx = ifp->if_softc;
1067 iflib_rxq_t rxq = &ctx->ifc_rxqs[kring->ring_id];
1069 return netmap_ring_reinit(kring);
1072 * XXX netmap_fl_refill() only ever (re)fills free list 0 so far.
1075 for (i = 0, fl = rxq->ifr_fl; i < rxq->ifr_nfl; i++, fl++) {
1076 bus_dmamap_sync(fl->ifl_ifdi->idi_tag, fl->ifl_ifdi->idi_map,
1077 BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE);
1081 * First part: import newly received packets.
1083 * nm_i is the index of the next free slot in the netmap ring,
1084 * nic_i is the index of the next received packet in the NIC ring,
1085 * and they may differ in case if_init() has been called while
1086 * in netmap mode. For the receive ring we have
1088 * nic_i = rxr->next_check;
1089 * nm_i = kring->nr_hwtail (previous)
1091 * nm_i == (nic_i + kring->nkr_hwofs) % ring_size
1093 * rxr->next_check is set to 0 on a ring reinit
1095 if (netmap_no_pendintr || force_update) {
1096 int crclen = iflib_crcstrip ? 0 : 4;
1099 for (i = 0; i < rxq->ifr_nfl; i++) {
1100 fl = &rxq->ifr_fl[i];
1101 nic_i = fl->ifl_cidx;
1102 nm_i = netmap_idx_n2k(kring, nic_i);
1103 avail = ctx->isc_rxd_available(ctx->ifc_softc,
1104 rxq->ifr_id, nic_i, USHRT_MAX);
1105 for (n = 0; avail > 0; n++, avail--) {
1107 ri.iri_frags = rxq->ifr_frags;
1108 ri.iri_qsidx = kring->ring_id;
1109 ri.iri_ifp = ctx->ifc_ifp;
1110 ri.iri_cidx = nic_i;
1112 error = ctx->isc_rxd_pkt_get(ctx->ifc_softc, &ri);
1113 ring->slot[nm_i].len = error ? 0 : ri.iri_len - crclen;
1114 ring->slot[nm_i].flags = 0;
1115 bus_dmamap_sync(fl->ifl_buf_tag,
1116 fl->ifl_sds.ifsd_map[nic_i], BUS_DMASYNC_POSTREAD);
1117 nm_i = nm_next(nm_i, lim);
1118 nic_i = nm_next(nic_i, lim);
1120 if (n) { /* update the state variables */
1121 if (netmap_no_pendintr && !force_update) {
1124 iflib_rx_miss_bufs += n;
1126 fl->ifl_cidx = nic_i;
1127 kring->nr_hwtail = nm_i;
1129 kring->nr_kflags &= ~NKR_PENDINTR;
1133 * Second part: skip past packets that userspace has released.
1134 * (kring->nr_hwcur to head excluded),
1135 * and make the buffers available for reception.
1136 * As usual nm_i is the index in the netmap ring,
1137 * nic_i is the index in the NIC ring, and
1138 * nm_i == (nic_i + kring->nkr_hwofs) % ring_size
1140 /* XXX not sure how this will work with multiple free lists */
1141 nm_i = kring->nr_hwcur;
1143 return (netmap_fl_refill(rxq, kring, nm_i, false));
1147 iflib_netmap_intr(struct netmap_adapter *na, int onoff)
1149 if_ctx_t ctx = na->ifp->if_softc;
1153 IFDI_INTR_ENABLE(ctx);
1155 IFDI_INTR_DISABLE(ctx);
1162 iflib_netmap_attach(if_ctx_t ctx)
1164 struct netmap_adapter na;
1165 if_softc_ctx_t scctx = &ctx->ifc_softc_ctx;
1167 bzero(&na, sizeof(na));
1169 na.ifp = ctx->ifc_ifp;
1170 na.na_flags = NAF_BDG_MAYSLEEP;
1171 MPASS(ctx->ifc_softc_ctx.isc_ntxqsets);
1172 MPASS(ctx->ifc_softc_ctx.isc_nrxqsets);
1174 na.num_tx_desc = scctx->isc_ntxd[0];
1175 na.num_rx_desc = scctx->isc_nrxd[0];
1176 na.nm_txsync = iflib_netmap_txsync;
1177 na.nm_rxsync = iflib_netmap_rxsync;
1178 na.nm_register = iflib_netmap_register;
1179 na.nm_intr = iflib_netmap_intr;
1180 na.num_tx_rings = ctx->ifc_softc_ctx.isc_ntxqsets;
1181 na.num_rx_rings = ctx->ifc_softc_ctx.isc_nrxqsets;
1182 return (netmap_attach(&na));
1186 iflib_netmap_txq_init(if_ctx_t ctx, iflib_txq_t txq)
1188 struct netmap_adapter *na = NA(ctx->ifc_ifp);
1189 struct netmap_slot *slot;
1191 slot = netmap_reset(na, NR_TX, txq->ift_id, 0);
1194 for (int i = 0; i < ctx->ifc_softc_ctx.isc_ntxd[0]; i++) {
1197 * In netmap mode, set the map for the packet buffer.
1198 * NOTE: Some drivers (not this one) also need to set
1199 * the physical buffer address in the NIC ring.
1200 * netmap_idx_n2k() maps a nic index, i, into the corresponding
1201 * netmap slot index, si
1203 int si = netmap_idx_n2k(na->tx_rings[txq->ift_id], i);
1204 netmap_load_map(na, txq->ift_buf_tag, txq->ift_sds.ifsd_map[i],
1205 NMB(na, slot + si));
1210 iflib_netmap_rxq_init(if_ctx_t ctx, iflib_rxq_t rxq)
1212 struct netmap_adapter *na = NA(ctx->ifc_ifp);
1213 struct netmap_kring *kring = na->rx_rings[rxq->ifr_id];
1214 struct netmap_slot *slot;
1217 slot = netmap_reset(na, NR_RX, rxq->ifr_id, 0);
1220 nm_i = netmap_idx_n2k(kring, 0);
1221 netmap_fl_refill(rxq, kring, nm_i, true);
1225 iflib_netmap_timer_adjust(if_ctx_t ctx, iflib_txq_t txq, uint32_t *reset_on)
1227 struct netmap_kring *kring;
1230 txqid = txq->ift_id;
1231 kring = NA(ctx->ifc_ifp)->tx_rings[txqid];
1233 if (kring->nr_hwcur != nm_next(kring->nr_hwtail, kring->nkr_num_slots - 1)) {
1234 bus_dmamap_sync(txq->ift_ifdi->idi_tag, txq->ift_ifdi->idi_map,
1235 BUS_DMASYNC_POSTREAD);
1236 if (ctx->isc_txd_credits_update(ctx->ifc_softc, txqid, false))
1237 netmap_tx_irq(ctx->ifc_ifp, txqid);
1238 if (!(ctx->ifc_flags & IFC_NETMAP_TX_IRQ)) {
1242 *reset_on = hz / 1000;
1247 #define iflib_netmap_detach(ifp) netmap_detach(ifp)
1250 #define iflib_netmap_txq_init(ctx, txq)
1251 #define iflib_netmap_rxq_init(ctx, rxq)
1252 #define iflib_netmap_detach(ifp)
1254 #define iflib_netmap_attach(ctx) (0)
1255 #define netmap_rx_irq(ifp, qid, budget) (0)
1256 #define netmap_tx_irq(ifp, qid) do {} while (0)
1257 #define iflib_netmap_timer_adjust(ctx, txq, reset_on)
1260 #if defined(__i386__) || defined(__amd64__)
1261 static __inline void
1264 __asm volatile("prefetcht0 %0" :: "m" (*(unsigned long *)x));
1266 static __inline void
1267 prefetch2cachelines(void *x)
1269 __asm volatile("prefetcht0 %0" :: "m" (*(unsigned long *)x));
1270 #if (CACHE_LINE_SIZE < 128)
1271 __asm volatile("prefetcht0 %0" :: "m" (*(((unsigned long *)x)+CACHE_LINE_SIZE/(sizeof(unsigned long)))));
1276 #define prefetch2cachelines(x)
1280 iru_init(if_rxd_update_t iru, iflib_rxq_t rxq, uint8_t flid)
1284 fl = &rxq->ifr_fl[flid];
1285 iru->iru_paddrs = fl->ifl_bus_addrs;
1286 iru->iru_vaddrs = &fl->ifl_vm_addrs[0];
1287 iru->iru_idxs = fl->ifl_rxd_idxs;
1288 iru->iru_qsidx = rxq->ifr_id;
1289 iru->iru_buf_size = fl->ifl_buf_size;
1290 iru->iru_flidx = fl->ifl_id;
1294 _iflib_dmamap_cb(void *arg, bus_dma_segment_t *segs, int nseg, int err)
1298 *(bus_addr_t *) arg = segs[0].ds_addr;
1302 iflib_dma_alloc_align(if_ctx_t ctx, int size, int align, iflib_dma_info_t dma, int mapflags)
1305 device_t dev = ctx->ifc_dev;
1307 err = bus_dma_tag_create(bus_get_dma_tag(dev), /* parent */
1308 align, 0, /* alignment, bounds */
1309 BUS_SPACE_MAXADDR, /* lowaddr */
1310 BUS_SPACE_MAXADDR, /* highaddr */
1311 NULL, NULL, /* filter, filterarg */
1314 size, /* maxsegsize */
1315 BUS_DMA_ALLOCNOW, /* flags */
1316 NULL, /* lockfunc */
1321 "%s: bus_dma_tag_create failed: %d\n",
1326 err = bus_dmamem_alloc(dma->idi_tag, (void**) &dma->idi_vaddr,
1327 BUS_DMA_NOWAIT | BUS_DMA_COHERENT | BUS_DMA_ZERO, &dma->idi_map);
1330 "%s: bus_dmamem_alloc(%ju) failed: %d\n",
1331 __func__, (uintmax_t)size, err);
1335 dma->idi_paddr = IF_BAD_DMA;
1336 err = bus_dmamap_load(dma->idi_tag, dma->idi_map, dma->idi_vaddr,
1337 size, _iflib_dmamap_cb, &dma->idi_paddr, mapflags | BUS_DMA_NOWAIT);
1338 if (err || dma->idi_paddr == IF_BAD_DMA) {
1340 "%s: bus_dmamap_load failed: %d\n",
1345 dma->idi_size = size;
1349 bus_dmamem_free(dma->idi_tag, dma->idi_vaddr, dma->idi_map);
1351 bus_dma_tag_destroy(dma->idi_tag);
1353 dma->idi_tag = NULL;
1359 iflib_dma_alloc(if_ctx_t ctx, int size, iflib_dma_info_t dma, int mapflags)
1361 if_shared_ctx_t sctx = ctx->ifc_sctx;
1363 KASSERT(sctx->isc_q_align != 0, ("alignment value not initialized"));
1365 return (iflib_dma_alloc_align(ctx, size, sctx->isc_q_align, dma, mapflags));
1369 iflib_dma_alloc_multi(if_ctx_t ctx, int *sizes, iflib_dma_info_t *dmalist, int mapflags, int count)
1372 iflib_dma_info_t *dmaiter;
1375 for (i = 0; i < count; i++, dmaiter++) {
1376 if ((err = iflib_dma_alloc(ctx, sizes[i], *dmaiter, mapflags)) != 0)
1380 iflib_dma_free_multi(dmalist, i);
1385 iflib_dma_free(iflib_dma_info_t dma)
1387 if (dma->idi_tag == NULL)
1389 if (dma->idi_paddr != IF_BAD_DMA) {
1390 bus_dmamap_sync(dma->idi_tag, dma->idi_map,
1391 BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE);
1392 bus_dmamap_unload(dma->idi_tag, dma->idi_map);
1393 dma->idi_paddr = IF_BAD_DMA;
1395 if (dma->idi_vaddr != NULL) {
1396 bus_dmamem_free(dma->idi_tag, dma->idi_vaddr, dma->idi_map);
1397 dma->idi_vaddr = NULL;
1399 bus_dma_tag_destroy(dma->idi_tag);
1400 dma->idi_tag = NULL;
1404 iflib_dma_free_multi(iflib_dma_info_t *dmalist, int count)
1407 iflib_dma_info_t *dmaiter = dmalist;
1409 for (i = 0; i < count; i++, dmaiter++)
1410 iflib_dma_free(*dmaiter);
1413 #ifdef EARLY_AP_STARTUP
1414 static const int iflib_started = 1;
1417 * We used to abuse the smp_started flag to decide if the queues have been
1418 * fully initialized (by late taskqgroup_adjust() calls in a SYSINIT()).
1419 * That gave bad races, since the SYSINIT() runs strictly after smp_started
1420 * is set. Run a SYSINIT() strictly after that to just set a usable
1424 static int iflib_started;
1427 iflib_record_started(void *arg)
1432 SYSINIT(iflib_record_started, SI_SUB_SMP + 1, SI_ORDER_FIRST,
1433 iflib_record_started, NULL);
1437 iflib_fast_intr(void *arg)
1439 iflib_filter_info_t info = arg;
1440 struct grouptask *gtask = info->ifi_task;
1444 return (FILTER_STRAY);
1446 DBG_COUNTER_INC(fast_intrs);
1447 if (info->ifi_filter != NULL) {
1448 result = info->ifi_filter(info->ifi_filter_arg);
1449 if ((result & FILTER_SCHEDULE_THREAD) == 0)
1453 GROUPTASK_ENQUEUE(gtask);
1454 return (FILTER_HANDLED);
1458 iflib_fast_intr_rxtx(void *arg)
1460 iflib_filter_info_t info = arg;
1461 struct grouptask *gtask = info->ifi_task;
1463 iflib_rxq_t rxq = (iflib_rxq_t)info->ifi_ctx;
1466 int i, cidx, result;
1468 bool intr_enable, intr_legacy;
1471 return (FILTER_STRAY);
1473 DBG_COUNTER_INC(fast_intrs);
1474 if (info->ifi_filter != NULL) {
1475 result = info->ifi_filter(info->ifi_filter_arg);
1476 if ((result & FILTER_SCHEDULE_THREAD) == 0)
1481 sc = ctx->ifc_softc;
1482 intr_enable = false;
1483 intr_legacy = !!(ctx->ifc_flags & IFC_LEGACY);
1484 MPASS(rxq->ifr_ntxqirq);
1485 for (i = 0; i < rxq->ifr_ntxqirq; i++) {
1486 txqid = rxq->ifr_txqid[i];
1487 txq = &ctx->ifc_txqs[txqid];
1488 bus_dmamap_sync(txq->ift_ifdi->idi_tag, txq->ift_ifdi->idi_map,
1489 BUS_DMASYNC_POSTREAD);
1490 if (!ctx->isc_txd_credits_update(sc, txqid, false)) {
1494 IFDI_TX_QUEUE_INTR_ENABLE(ctx, txqid);
1497 GROUPTASK_ENQUEUE(&txq->ift_task);
1499 if (ctx->ifc_sctx->isc_flags & IFLIB_HAS_RXCQ)
1500 cidx = rxq->ifr_cq_cidx;
1502 cidx = rxq->ifr_fl[0].ifl_cidx;
1503 if (iflib_rxd_avail(ctx, rxq, cidx, 1))
1504 GROUPTASK_ENQUEUE(gtask);
1509 IFDI_RX_QUEUE_INTR_ENABLE(ctx, rxq->ifr_id);
1510 DBG_COUNTER_INC(rx_intr_enables);
1513 IFDI_INTR_ENABLE(ctx);
1514 return (FILTER_HANDLED);
1519 iflib_fast_intr_ctx(void *arg)
1521 iflib_filter_info_t info = arg;
1522 struct grouptask *gtask = info->ifi_task;
1526 return (FILTER_STRAY);
1528 DBG_COUNTER_INC(fast_intrs);
1529 if (info->ifi_filter != NULL) {
1530 result = info->ifi_filter(info->ifi_filter_arg);
1531 if ((result & FILTER_SCHEDULE_THREAD) == 0)
1535 GROUPTASK_ENQUEUE(gtask);
1536 return (FILTER_HANDLED);
1540 _iflib_irq_alloc(if_ctx_t ctx, if_irq_t irq, int rid,
1541 driver_filter_t filter, driver_intr_t handler, void *arg,
1544 struct resource *res;
1546 device_t dev = ctx->ifc_dev;
1550 if (ctx->ifc_flags & IFC_LEGACY)
1551 flags |= RF_SHAREABLE;
1554 res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &i, flags);
1557 "failed to allocate IRQ for rid %d, name %s.\n", rid, name);
1561 KASSERT(filter == NULL || handler == NULL, ("filter and handler can't both be non-NULL"));
1562 rc = bus_setup_intr(dev, res, INTR_MPSAFE | INTR_TYPE_NET,
1563 filter, handler, arg, &tag);
1566 "failed to setup interrupt for rid %d, name %s: %d\n",
1567 rid, name ? name : "unknown", rc);
1570 bus_describe_intr(dev, res, tag, "%s", name);
1576 /*********************************************************************
1578 * Allocate DMA resources for TX buffers as well as memory for the TX
1579 * mbuf map. TX DMA maps (non-TSO/TSO) and TX mbuf map are kept in a
1580 * iflib_sw_tx_desc_array structure, storing all the information that
1581 * is needed to transmit a packet on the wire. This is called only
1582 * once at attach, setup is done every reset.
1584 **********************************************************************/
1586 iflib_txsd_alloc(iflib_txq_t txq)
1588 if_ctx_t ctx = txq->ift_ctx;
1589 if_shared_ctx_t sctx = ctx->ifc_sctx;
1590 if_softc_ctx_t scctx = &ctx->ifc_softc_ctx;
1591 device_t dev = ctx->ifc_dev;
1592 bus_size_t tsomaxsize;
1593 int err, nsegments, ntsosegments;
1596 nsegments = scctx->isc_tx_nsegments;
1597 ntsosegments = scctx->isc_tx_tso_segments_max;
1598 tsomaxsize = scctx->isc_tx_tso_size_max;
1599 if (if_getcapabilities(ctx->ifc_ifp) & IFCAP_VLAN_MTU)
1600 tsomaxsize += sizeof(struct ether_vlan_header);
1601 MPASS(scctx->isc_ntxd[0] > 0);
1602 MPASS(scctx->isc_ntxd[txq->ift_br_offset] > 0);
1603 MPASS(nsegments > 0);
1604 if (if_getcapabilities(ctx->ifc_ifp) & IFCAP_TSO) {
1605 MPASS(ntsosegments > 0);
1606 MPASS(sctx->isc_tso_maxsize >= tsomaxsize);
1610 * Set up DMA tags for TX buffers.
1612 if ((err = bus_dma_tag_create(bus_get_dma_tag(dev),
1613 1, 0, /* alignment, bounds */
1614 BUS_SPACE_MAXADDR, /* lowaddr */
1615 BUS_SPACE_MAXADDR, /* highaddr */
1616 NULL, NULL, /* filter, filterarg */
1617 sctx->isc_tx_maxsize, /* maxsize */
1618 nsegments, /* nsegments */
1619 sctx->isc_tx_maxsegsize, /* maxsegsize */
1621 NULL, /* lockfunc */
1622 NULL, /* lockfuncarg */
1623 &txq->ift_buf_tag))) {
1624 device_printf(dev,"Unable to allocate TX DMA tag: %d\n", err);
1625 device_printf(dev,"maxsize: %ju nsegments: %d maxsegsize: %ju\n",
1626 (uintmax_t)sctx->isc_tx_maxsize, nsegments, (uintmax_t)sctx->isc_tx_maxsegsize);
1629 tso = (if_getcapabilities(ctx->ifc_ifp) & IFCAP_TSO) != 0;
1630 if (tso && (err = bus_dma_tag_create(bus_get_dma_tag(dev),
1631 1, 0, /* alignment, bounds */
1632 BUS_SPACE_MAXADDR, /* lowaddr */
1633 BUS_SPACE_MAXADDR, /* highaddr */
1634 NULL, NULL, /* filter, filterarg */
1635 tsomaxsize, /* maxsize */
1636 ntsosegments, /* nsegments */
1637 sctx->isc_tso_maxsegsize,/* maxsegsize */
1639 NULL, /* lockfunc */
1640 NULL, /* lockfuncarg */
1641 &txq->ift_tso_buf_tag))) {
1642 device_printf(dev, "Unable to allocate TSO TX DMA tag: %d\n",
1647 /* Allocate memory for the TX mbuf map. */
1648 if (!(txq->ift_sds.ifsd_m =
1649 (struct mbuf **) malloc(sizeof(struct mbuf *) *
1650 scctx->isc_ntxd[txq->ift_br_offset], M_IFLIB, M_NOWAIT | M_ZERO))) {
1651 device_printf(dev, "Unable to allocate TX mbuf map memory\n");
1657 * Create the DMA maps for TX buffers.
1659 if ((txq->ift_sds.ifsd_map = (bus_dmamap_t *)malloc(
1660 sizeof(bus_dmamap_t) * scctx->isc_ntxd[txq->ift_br_offset],
1661 M_IFLIB, M_NOWAIT | M_ZERO)) == NULL) {
1663 "Unable to allocate TX buffer DMA map memory\n");
1667 if (tso && (txq->ift_sds.ifsd_tso_map = (bus_dmamap_t *)malloc(
1668 sizeof(bus_dmamap_t) * scctx->isc_ntxd[txq->ift_br_offset],
1669 M_IFLIB, M_NOWAIT | M_ZERO)) == NULL) {
1671 "Unable to allocate TSO TX buffer map memory\n");
1675 for (int i = 0; i < scctx->isc_ntxd[txq->ift_br_offset]; i++) {
1676 err = bus_dmamap_create(txq->ift_buf_tag, 0,
1677 &txq->ift_sds.ifsd_map[i]);
1679 device_printf(dev, "Unable to create TX DMA map\n");
1684 err = bus_dmamap_create(txq->ift_tso_buf_tag, 0,
1685 &txq->ift_sds.ifsd_tso_map[i]);
1687 device_printf(dev, "Unable to create TSO TX DMA map\n");
1693 /* We free all, it handles case where we are in the middle */
1694 iflib_tx_structures_free(ctx);
1699 iflib_txsd_destroy(if_ctx_t ctx, iflib_txq_t txq, int i)
1703 if (txq->ift_sds.ifsd_map != NULL) {
1704 map = txq->ift_sds.ifsd_map[i];
1705 bus_dmamap_sync(txq->ift_buf_tag, map, BUS_DMASYNC_POSTWRITE);
1706 bus_dmamap_unload(txq->ift_buf_tag, map);
1707 bus_dmamap_destroy(txq->ift_buf_tag, map);
1708 txq->ift_sds.ifsd_map[i] = NULL;
1711 if (txq->ift_sds.ifsd_tso_map != NULL) {
1712 map = txq->ift_sds.ifsd_tso_map[i];
1713 bus_dmamap_sync(txq->ift_tso_buf_tag, map,
1714 BUS_DMASYNC_POSTWRITE);
1715 bus_dmamap_unload(txq->ift_tso_buf_tag, map);
1716 bus_dmamap_destroy(txq->ift_tso_buf_tag, map);
1717 txq->ift_sds.ifsd_tso_map[i] = NULL;
1722 iflib_txq_destroy(iflib_txq_t txq)
1724 if_ctx_t ctx = txq->ift_ctx;
1726 for (int i = 0; i < txq->ift_size; i++)
1727 iflib_txsd_destroy(ctx, txq, i);
1729 if (txq->ift_br != NULL) {
1730 ifmp_ring_free(txq->ift_br);
1734 mtx_destroy(&txq->ift_mtx);
1736 if (txq->ift_sds.ifsd_map != NULL) {
1737 free(txq->ift_sds.ifsd_map, M_IFLIB);
1738 txq->ift_sds.ifsd_map = NULL;
1740 if (txq->ift_sds.ifsd_tso_map != NULL) {
1741 free(txq->ift_sds.ifsd_tso_map, M_IFLIB);
1742 txq->ift_sds.ifsd_tso_map = NULL;
1744 if (txq->ift_sds.ifsd_m != NULL) {
1745 free(txq->ift_sds.ifsd_m, M_IFLIB);
1746 txq->ift_sds.ifsd_m = NULL;
1748 if (txq->ift_buf_tag != NULL) {
1749 bus_dma_tag_destroy(txq->ift_buf_tag);
1750 txq->ift_buf_tag = NULL;
1752 if (txq->ift_tso_buf_tag != NULL) {
1753 bus_dma_tag_destroy(txq->ift_tso_buf_tag);
1754 txq->ift_tso_buf_tag = NULL;
1756 if (txq->ift_ifdi != NULL) {
1757 free(txq->ift_ifdi, M_IFLIB);
1762 iflib_txsd_free(if_ctx_t ctx, iflib_txq_t txq, int i)
1766 mp = &txq->ift_sds.ifsd_m[i];
1770 if (txq->ift_sds.ifsd_map != NULL) {
1771 bus_dmamap_sync(txq->ift_buf_tag,
1772 txq->ift_sds.ifsd_map[i], BUS_DMASYNC_POSTWRITE);
1773 bus_dmamap_unload(txq->ift_buf_tag, txq->ift_sds.ifsd_map[i]);
1775 if (txq->ift_sds.ifsd_tso_map != NULL) {
1776 bus_dmamap_sync(txq->ift_tso_buf_tag,
1777 txq->ift_sds.ifsd_tso_map[i], BUS_DMASYNC_POSTWRITE);
1778 bus_dmamap_unload(txq->ift_tso_buf_tag,
1779 txq->ift_sds.ifsd_tso_map[i]);
1782 DBG_COUNTER_INC(tx_frees);
1787 iflib_txq_setup(iflib_txq_t txq)
1789 if_ctx_t ctx = txq->ift_ctx;
1790 if_softc_ctx_t scctx = &ctx->ifc_softc_ctx;
1791 if_shared_ctx_t sctx = ctx->ifc_sctx;
1792 iflib_dma_info_t di;
1795 /* Set number of descriptors available */
1796 txq->ift_qstatus = IFLIB_QUEUE_IDLE;
1797 /* XXX make configurable */
1798 txq->ift_update_freq = IFLIB_DEFAULT_TX_UPDATE_FREQ;
1801 txq->ift_cidx_processed = 0;
1802 txq->ift_pidx = txq->ift_cidx = txq->ift_npending = 0;
1803 txq->ift_size = scctx->isc_ntxd[txq->ift_br_offset];
1805 for (i = 0, di = txq->ift_ifdi; i < sctx->isc_ntxqs; i++, di++)
1806 bzero((void *)di->idi_vaddr, di->idi_size);
1808 IFDI_TXQ_SETUP(ctx, txq->ift_id);
1809 for (i = 0, di = txq->ift_ifdi; i < sctx->isc_ntxqs; i++, di++)
1810 bus_dmamap_sync(di->idi_tag, di->idi_map,
1811 BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
1815 /*********************************************************************
1817 * Allocate DMA resources for RX buffers as well as memory for the RX
1818 * mbuf map, direct RX cluster pointer map and RX cluster bus address
1819 * map. RX DMA map, RX mbuf map, direct RX cluster pointer map and
1820 * RX cluster map are kept in a iflib_sw_rx_desc_array structure.
1821 * Since we use use one entry in iflib_sw_rx_desc_array per received
1822 * packet, the maximum number of entries we'll need is equal to the
1823 * number of hardware receive descriptors that we've allocated.
1825 **********************************************************************/
1827 iflib_rxsd_alloc(iflib_rxq_t rxq)
1829 if_ctx_t ctx = rxq->ifr_ctx;
1830 if_shared_ctx_t sctx = ctx->ifc_sctx;
1831 if_softc_ctx_t scctx = &ctx->ifc_softc_ctx;
1832 device_t dev = ctx->ifc_dev;
1836 MPASS(scctx->isc_nrxd[0] > 0);
1837 MPASS(scctx->isc_nrxd[rxq->ifr_fl_offset] > 0);
1840 for (int i = 0; i < rxq->ifr_nfl; i++, fl++) {
1841 fl->ifl_size = scctx->isc_nrxd[rxq->ifr_fl_offset]; /* this isn't necessarily the same */
1842 /* Set up DMA tag for RX buffers. */
1843 err = bus_dma_tag_create(bus_get_dma_tag(dev), /* parent */
1844 1, 0, /* alignment, bounds */
1845 BUS_SPACE_MAXADDR, /* lowaddr */
1846 BUS_SPACE_MAXADDR, /* highaddr */
1847 NULL, NULL, /* filter, filterarg */
1848 sctx->isc_rx_maxsize, /* maxsize */
1849 sctx->isc_rx_nsegments, /* nsegments */
1850 sctx->isc_rx_maxsegsize, /* maxsegsize */
1852 NULL, /* lockfunc */
1857 "Unable to allocate RX DMA tag: %d\n", err);
1861 /* Allocate memory for the RX mbuf map. */
1862 if (!(fl->ifl_sds.ifsd_m =
1863 (struct mbuf **) malloc(sizeof(struct mbuf *) *
1864 scctx->isc_nrxd[rxq->ifr_fl_offset], M_IFLIB, M_NOWAIT | M_ZERO))) {
1866 "Unable to allocate RX mbuf map memory\n");
1871 /* Allocate memory for the direct RX cluster pointer map. */
1872 if (!(fl->ifl_sds.ifsd_cl =
1873 (caddr_t *) malloc(sizeof(caddr_t) *
1874 scctx->isc_nrxd[rxq->ifr_fl_offset], M_IFLIB, M_NOWAIT | M_ZERO))) {
1876 "Unable to allocate RX cluster map memory\n");
1881 /* Allocate memory for the RX cluster bus address map. */
1882 if (!(fl->ifl_sds.ifsd_ba =
1883 (bus_addr_t *) malloc(sizeof(bus_addr_t) *
1884 scctx->isc_nrxd[rxq->ifr_fl_offset], M_IFLIB, M_NOWAIT | M_ZERO))) {
1886 "Unable to allocate RX bus address map memory\n");
1892 * Create the DMA maps for RX buffers.
1894 if (!(fl->ifl_sds.ifsd_map =
1895 (bus_dmamap_t *) malloc(sizeof(bus_dmamap_t) * scctx->isc_nrxd[rxq->ifr_fl_offset], M_IFLIB, M_NOWAIT | M_ZERO))) {
1897 "Unable to allocate RX buffer DMA map memory\n");
1901 for (int i = 0; i < scctx->isc_nrxd[rxq->ifr_fl_offset]; i++) {
1902 err = bus_dmamap_create(fl->ifl_buf_tag, 0,
1903 &fl->ifl_sds.ifsd_map[i]);
1905 device_printf(dev, "Unable to create RX buffer DMA map\n");
1913 iflib_rx_structures_free(ctx);
1919 * Internal service routines
1922 struct rxq_refill_cb_arg {
1924 bus_dma_segment_t seg;
1929 _rxq_refill_cb(void *arg, bus_dma_segment_t *segs, int nseg, int error)
1931 struct rxq_refill_cb_arg *cb_arg = arg;
1933 cb_arg->error = error;
1934 cb_arg->seg = segs[0];
1935 cb_arg->nseg = nseg;
1939 * _iflib_fl_refill - refill an rxq free-buffer list
1940 * @ctx: the iflib context
1941 * @fl: the free list to refill
1942 * @count: the number of new buffers to allocate
1944 * (Re)populate an rxq free-buffer list with up to @count new packet buffers.
1945 * The caller must assure that @count does not exceed the queue's capacity.
1948 _iflib_fl_refill(if_ctx_t ctx, iflib_fl_t fl, int count)
1950 struct if_rxd_update iru;
1951 struct rxq_refill_cb_arg cb_arg;
1955 bus_dmamap_t *sd_map;
1956 bus_addr_t bus_addr, *sd_ba;
1957 int err, frag_idx, i, idx, n, pidx;
1960 sd_m = fl->ifl_sds.ifsd_m;
1961 sd_map = fl->ifl_sds.ifsd_map;
1962 sd_cl = fl->ifl_sds.ifsd_cl;
1963 sd_ba = fl->ifl_sds.ifsd_ba;
1964 pidx = fl->ifl_pidx;
1966 frag_idx = fl->ifl_fragidx;
1967 credits = fl->ifl_credits;
1972 MPASS(credits + n <= fl->ifl_size);
1974 if (pidx < fl->ifl_cidx)
1975 MPASS(pidx + n <= fl->ifl_cidx);
1976 if (pidx == fl->ifl_cidx && (credits < fl->ifl_size))
1977 MPASS(fl->ifl_gen == 0);
1978 if (pidx > fl->ifl_cidx)
1979 MPASS(n <= fl->ifl_size - pidx + fl->ifl_cidx);
1981 DBG_COUNTER_INC(fl_refills);
1983 DBG_COUNTER_INC(fl_refills_large);
1984 iru_init(&iru, fl->ifl_rxq, fl->ifl_id);
1987 * We allocate an uninitialized mbuf + cluster, mbuf is
1988 * initialized after rx.
1990 * If the cluster is still set then we know a minimum sized packet was received
1992 bit_ffc_at(fl->ifl_rx_bitmap, frag_idx, fl->ifl_size,
1995 bit_ffc(fl->ifl_rx_bitmap, fl->ifl_size, &frag_idx);
1996 MPASS(frag_idx >= 0);
1997 if ((cl = sd_cl[frag_idx]) == NULL) {
1998 if ((cl = m_cljget(NULL, M_NOWAIT, fl->ifl_buf_size)) == NULL)
2002 MPASS(sd_map != NULL);
2003 err = bus_dmamap_load(fl->ifl_buf_tag, sd_map[frag_idx],
2004 cl, fl->ifl_buf_size, _rxq_refill_cb, &cb_arg,
2006 if (err != 0 || cb_arg.error) {
2010 if (fl->ifl_zone == zone_pack)
2011 uma_zfree(fl->ifl_zone, cl);
2015 sd_ba[frag_idx] = bus_addr = cb_arg.seg.ds_addr;
2016 sd_cl[frag_idx] = cl;
2018 fl->ifl_cl_enqueued++;
2021 bus_addr = sd_ba[frag_idx];
2023 bus_dmamap_sync(fl->ifl_buf_tag, sd_map[frag_idx],
2024 BUS_DMASYNC_PREREAD);
2026 if (sd_m[frag_idx] == NULL) {
2027 if ((m = m_gethdr(M_NOWAIT, MT_NOINIT)) == NULL) {
2032 bit_set(fl->ifl_rx_bitmap, frag_idx);
2034 fl->ifl_m_enqueued++;
2037 DBG_COUNTER_INC(rx_allocs);
2038 fl->ifl_rxd_idxs[i] = frag_idx;
2039 fl->ifl_bus_addrs[i] = bus_addr;
2040 fl->ifl_vm_addrs[i] = cl;
2043 MPASS(credits <= fl->ifl_size);
2044 if (++idx == fl->ifl_size) {
2048 if (n == 0 || i == IFLIB_MAX_RX_REFRESH) {
2049 iru.iru_pidx = pidx;
2051 ctx->isc_rxd_refill(ctx->ifc_softc, &iru);
2055 fl->ifl_credits = credits;
2060 iru.iru_pidx = pidx;
2062 ctx->isc_rxd_refill(ctx->ifc_softc, &iru);
2064 fl->ifl_credits = credits;
2066 DBG_COUNTER_INC(rxd_flush);
2067 if (fl->ifl_pidx == 0)
2068 pidx = fl->ifl_size - 1;
2070 pidx = fl->ifl_pidx - 1;
2072 bus_dmamap_sync(fl->ifl_ifdi->idi_tag, fl->ifl_ifdi->idi_map,
2073 BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
2074 ctx->isc_rxd_flush(ctx->ifc_softc, fl->ifl_rxq->ifr_id, fl->ifl_id, pidx);
2075 fl->ifl_fragidx = frag_idx + 1;
2076 if (fl->ifl_fragidx == fl->ifl_size)
2077 fl->ifl_fragidx = 0;
2079 return (n == -1 ? 0 : IFLIB_RXEOF_EMPTY);
2082 static __inline uint8_t
2083 __iflib_fl_refill_all(if_ctx_t ctx, iflib_fl_t fl)
2085 /* we avoid allowing pidx to catch up with cidx as it confuses ixl */
2086 int32_t reclaimable = fl->ifl_size - fl->ifl_credits - 1;
2088 int32_t delta = fl->ifl_size - get_inuse(fl->ifl_size, fl->ifl_cidx, fl->ifl_pidx, fl->ifl_gen) - 1;
2091 MPASS(fl->ifl_credits <= fl->ifl_size);
2092 MPASS(reclaimable == delta);
2094 if (reclaimable > 0)
2095 return (_iflib_fl_refill(ctx, fl, reclaimable));
2100 iflib_in_detach(if_ctx_t ctx)
2105 in_detach = !!(ctx->ifc_flags & IFC_IN_DETACH);
2111 iflib_fl_bufs_free(iflib_fl_t fl)
2113 iflib_dma_info_t idi = fl->ifl_ifdi;
2114 bus_dmamap_t sd_map;
2117 for (i = 0; i < fl->ifl_size; i++) {
2118 struct mbuf **sd_m = &fl->ifl_sds.ifsd_m[i];
2119 caddr_t *sd_cl = &fl->ifl_sds.ifsd_cl[i];
2121 if (*sd_cl != NULL) {
2122 sd_map = fl->ifl_sds.ifsd_map[i];
2123 bus_dmamap_sync(fl->ifl_buf_tag, sd_map,
2124 BUS_DMASYNC_POSTREAD);
2125 bus_dmamap_unload(fl->ifl_buf_tag, sd_map);
2127 uma_zfree(fl->ifl_zone, *sd_cl);
2128 if (*sd_m != NULL) {
2129 m_init(*sd_m, M_NOWAIT, MT_DATA, 0);
2130 uma_zfree(zone_mbuf, *sd_m);
2133 MPASS(*sd_cl == NULL);
2134 MPASS(*sd_m == NULL);
2137 fl->ifl_m_dequeued++;
2138 fl->ifl_cl_dequeued++;
2144 for (i = 0; i < fl->ifl_size; i++) {
2145 MPASS(fl->ifl_sds.ifsd_cl[i] == NULL);
2146 MPASS(fl->ifl_sds.ifsd_m[i] == NULL);
2150 * Reset free list values
2152 fl->ifl_credits = fl->ifl_cidx = fl->ifl_pidx = fl->ifl_gen = fl->ifl_fragidx = 0;
2153 bzero(idi->idi_vaddr, idi->idi_size);
2156 /*********************************************************************
2158 * Initialize a free list and its buffers.
2160 **********************************************************************/
2162 iflib_fl_setup(iflib_fl_t fl)
2164 iflib_rxq_t rxq = fl->ifl_rxq;
2165 if_ctx_t ctx = rxq->ifr_ctx;
2166 if_softc_ctx_t scctx = &ctx->ifc_softc_ctx;
2169 bit_nclear(fl->ifl_rx_bitmap, 0, fl->ifl_size - 1);
2171 ** Free current RX buffer structs and their mbufs
2173 iflib_fl_bufs_free(fl);
2174 /* Now replenish the mbufs */
2175 MPASS(fl->ifl_credits == 0);
2176 qidx = rxq->ifr_fl_offset + fl->ifl_id;
2177 if (scctx->isc_rxd_buf_size[qidx] != 0)
2178 fl->ifl_buf_size = scctx->isc_rxd_buf_size[qidx];
2180 fl->ifl_buf_size = ctx->ifc_rx_mbuf_sz;
2182 * ifl_buf_size may be a driver-supplied value, so pull it up
2183 * to the selected mbuf size.
2185 fl->ifl_buf_size = iflib_get_mbuf_size_for(fl->ifl_buf_size);
2186 if (fl->ifl_buf_size > ctx->ifc_max_fl_buf_size)
2187 ctx->ifc_max_fl_buf_size = fl->ifl_buf_size;
2188 fl->ifl_cltype = m_gettype(fl->ifl_buf_size);
2189 fl->ifl_zone = m_getzone(fl->ifl_buf_size);
2192 /* avoid pre-allocating zillions of clusters to an idle card
2193 * potentially speeding up attach
2195 (void) _iflib_fl_refill(ctx, fl, min(128, fl->ifl_size));
2196 MPASS(min(128, fl->ifl_size) == fl->ifl_credits);
2197 if (min(128, fl->ifl_size) != fl->ifl_credits)
2203 MPASS(fl->ifl_ifdi != NULL);
2204 bus_dmamap_sync(fl->ifl_ifdi->idi_tag, fl->ifl_ifdi->idi_map,
2205 BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
2209 /*********************************************************************
2211 * Free receive ring data structures
2213 **********************************************************************/
2215 iflib_rx_sds_free(iflib_rxq_t rxq)
2220 if (rxq->ifr_fl != NULL) {
2221 for (i = 0; i < rxq->ifr_nfl; i++) {
2222 fl = &rxq->ifr_fl[i];
2223 if (fl->ifl_buf_tag != NULL) {
2224 if (fl->ifl_sds.ifsd_map != NULL) {
2225 for (j = 0; j < fl->ifl_size; j++) {
2228 fl->ifl_sds.ifsd_map[j],
2229 BUS_DMASYNC_POSTREAD);
2232 fl->ifl_sds.ifsd_map[j]);
2235 fl->ifl_sds.ifsd_map[j]);
2238 bus_dma_tag_destroy(fl->ifl_buf_tag);
2239 fl->ifl_buf_tag = NULL;
2241 free(fl->ifl_sds.ifsd_m, M_IFLIB);
2242 free(fl->ifl_sds.ifsd_cl, M_IFLIB);
2243 free(fl->ifl_sds.ifsd_ba, M_IFLIB);
2244 free(fl->ifl_sds.ifsd_map, M_IFLIB);
2245 fl->ifl_sds.ifsd_m = NULL;
2246 fl->ifl_sds.ifsd_cl = NULL;
2247 fl->ifl_sds.ifsd_ba = NULL;
2248 fl->ifl_sds.ifsd_map = NULL;
2250 free(rxq->ifr_fl, M_IFLIB);
2252 free(rxq->ifr_ifdi, M_IFLIB);
2253 rxq->ifr_ifdi = NULL;
2254 rxq->ifr_cq_cidx = 0;
2262 iflib_timer(void *arg)
2264 iflib_txq_t txq = arg;
2265 if_ctx_t ctx = txq->ift_ctx;
2266 if_softc_ctx_t sctx = &ctx->ifc_softc_ctx;
2267 uint64_t this_tick = ticks;
2268 uint32_t reset_on = hz / 2;
2270 if (!(if_getdrvflags(ctx->ifc_ifp) & IFF_DRV_RUNNING))
2274 ** Check on the state of the TX queue(s), this
2275 ** can be done without the lock because its RO
2276 ** and the HUNG state will be static if set.
2278 if (this_tick - txq->ift_last_timer_tick >= hz / 2) {
2279 txq->ift_last_timer_tick = this_tick;
2280 IFDI_TIMER(ctx, txq->ift_id);
2281 if ((txq->ift_qstatus == IFLIB_QUEUE_HUNG) &&
2282 ((txq->ift_cleaned_prev == txq->ift_cleaned) ||
2283 (sctx->isc_pause_frames == 0)))
2286 if (txq->ift_qstatus != IFLIB_QUEUE_IDLE &&
2287 ifmp_ring_is_stalled(txq->ift_br)) {
2288 KASSERT(ctx->ifc_link_state == LINK_STATE_UP, ("queue can't be marked as hung if interface is down"));
2289 txq->ift_qstatus = IFLIB_QUEUE_HUNG;
2291 txq->ift_cleaned_prev = txq->ift_cleaned;
2294 if (if_getcapenable(ctx->ifc_ifp) & IFCAP_NETMAP)
2295 iflib_netmap_timer_adjust(ctx, txq, &reset_on);
2297 /* handle any laggards */
2298 if (txq->ift_db_pending)
2299 GROUPTASK_ENQUEUE(&txq->ift_task);
2301 sctx->isc_pause_frames = 0;
2302 if (if_getdrvflags(ctx->ifc_ifp) & IFF_DRV_RUNNING)
2303 callout_reset_on(&txq->ift_timer, reset_on, iflib_timer, txq, txq->ift_timer.c_cpu);
2307 device_printf(ctx->ifc_dev,
2308 "Watchdog timeout (TX: %d desc avail: %d pidx: %d) -- resetting\n",
2309 txq->ift_id, TXQ_AVAIL(txq), txq->ift_pidx);
2311 if_setdrvflagbits(ctx->ifc_ifp, IFF_DRV_OACTIVE, IFF_DRV_RUNNING);
2312 ctx->ifc_flags |= (IFC_DO_WATCHDOG|IFC_DO_RESET);
2313 iflib_admin_intr_deferred(ctx);
2318 iflib_get_mbuf_size_for(unsigned int size)
2321 if (size <= MCLBYTES)
2324 return (MJUMPAGESIZE);
2328 iflib_calc_rx_mbuf_sz(if_ctx_t ctx)
2330 if_softc_ctx_t sctx = &ctx->ifc_softc_ctx;
2333 * XXX don't set the max_frame_size to larger
2334 * than the hardware can handle
2336 ctx->ifc_rx_mbuf_sz =
2337 iflib_get_mbuf_size_for(sctx->isc_max_frame_size);
2341 iflib_get_rx_mbuf_sz(if_ctx_t ctx)
2344 return (ctx->ifc_rx_mbuf_sz);
2348 iflib_init_locked(if_ctx_t ctx)
2350 if_softc_ctx_t sctx = &ctx->ifc_softc_ctx;
2351 if_softc_ctx_t scctx = &ctx->ifc_softc_ctx;
2352 if_t ifp = ctx->ifc_ifp;
2356 int i, j, tx_ip_csum_flags, tx_ip6_csum_flags;
2358 if_setdrvflagbits(ifp, IFF_DRV_OACTIVE, IFF_DRV_RUNNING);
2359 IFDI_INTR_DISABLE(ctx);
2361 tx_ip_csum_flags = scctx->isc_tx_csum_flags & (CSUM_IP | CSUM_TCP | CSUM_UDP | CSUM_SCTP);
2362 tx_ip6_csum_flags = scctx->isc_tx_csum_flags & (CSUM_IP6_TCP | CSUM_IP6_UDP | CSUM_IP6_SCTP);
2363 /* Set hardware offload abilities */
2364 if_clearhwassist(ifp);
2365 if (if_getcapenable(ifp) & IFCAP_TXCSUM)
2366 if_sethwassistbits(ifp, tx_ip_csum_flags, 0);
2367 if (if_getcapenable(ifp) & IFCAP_TXCSUM_IPV6)
2368 if_sethwassistbits(ifp, tx_ip6_csum_flags, 0);
2369 if (if_getcapenable(ifp) & IFCAP_TSO4)
2370 if_sethwassistbits(ifp, CSUM_IP_TSO, 0);
2371 if (if_getcapenable(ifp) & IFCAP_TSO6)
2372 if_sethwassistbits(ifp, CSUM_IP6_TSO, 0);
2374 for (i = 0, txq = ctx->ifc_txqs; i < sctx->isc_ntxqsets; i++, txq++) {
2376 callout_stop(&txq->ift_timer);
2377 CALLOUT_UNLOCK(txq);
2378 iflib_netmap_txq_init(ctx, txq);
2382 * Calculate a suitable Rx mbuf size prior to calling IFDI_INIT, so
2383 * that drivers can use the value when setting up the hardware receive
2386 iflib_calc_rx_mbuf_sz(ctx);
2389 i = if_getdrvflags(ifp);
2392 MPASS(if_getdrvflags(ifp) == i);
2393 for (i = 0, rxq = ctx->ifc_rxqs; i < sctx->isc_nrxqsets; i++, rxq++) {
2394 /* XXX this should really be done on a per-queue basis */
2395 if (if_getcapenable(ifp) & IFCAP_NETMAP) {
2396 MPASS(rxq->ifr_id == i);
2397 iflib_netmap_rxq_init(ctx, rxq);
2400 for (j = 0, fl = rxq->ifr_fl; j < rxq->ifr_nfl; j++, fl++) {
2401 if (iflib_fl_setup(fl)) {
2402 device_printf(ctx->ifc_dev,
2403 "setting up free list %d failed - "
2404 "check cluster settings\n", j);
2410 if_setdrvflagbits(ctx->ifc_ifp, IFF_DRV_RUNNING, IFF_DRV_OACTIVE);
2411 IFDI_INTR_ENABLE(ctx);
2412 txq = ctx->ifc_txqs;
2413 for (i = 0; i < sctx->isc_ntxqsets; i++, txq++)
2414 callout_reset_on(&txq->ift_timer, hz/2, iflib_timer, txq,
2415 txq->ift_timer.c_cpu);
2419 iflib_media_change(if_t ifp)
2421 if_ctx_t ctx = if_getsoftc(ifp);
2425 if ((err = IFDI_MEDIA_CHANGE(ctx)) == 0)
2426 iflib_init_locked(ctx);
2432 iflib_media_status(if_t ifp, struct ifmediareq *ifmr)
2434 if_ctx_t ctx = if_getsoftc(ifp);
2437 IFDI_UPDATE_ADMIN_STATUS(ctx);
2438 IFDI_MEDIA_STATUS(ctx, ifmr);
2443 iflib_stop(if_ctx_t ctx)
2445 iflib_txq_t txq = ctx->ifc_txqs;
2446 iflib_rxq_t rxq = ctx->ifc_rxqs;
2447 if_softc_ctx_t scctx = &ctx->ifc_softc_ctx;
2448 if_shared_ctx_t sctx = ctx->ifc_sctx;
2449 iflib_dma_info_t di;
2453 /* Tell the stack that the interface is no longer active */
2454 if_setdrvflagbits(ctx->ifc_ifp, IFF_DRV_OACTIVE, IFF_DRV_RUNNING);
2456 IFDI_INTR_DISABLE(ctx);
2461 iflib_debug_reset();
2462 /* Wait for current tx queue users to exit to disarm watchdog timer. */
2463 for (i = 0; i < scctx->isc_ntxqsets; i++, txq++) {
2464 /* make sure all transmitters have completed before proceeding XXX */
2467 callout_stop(&txq->ift_timer);
2468 CALLOUT_UNLOCK(txq);
2470 /* clean any enqueued buffers */
2471 iflib_ifmp_purge(txq);
2472 /* Free any existing tx buffers. */
2473 for (j = 0; j < txq->ift_size; j++) {
2474 iflib_txsd_free(ctx, txq, j);
2476 txq->ift_processed = txq->ift_cleaned = txq->ift_cidx_processed = 0;
2477 txq->ift_in_use = txq->ift_gen = txq->ift_cidx = txq->ift_pidx = txq->ift_no_desc_avail = 0;
2478 txq->ift_closed = txq->ift_mbuf_defrag = txq->ift_mbuf_defrag_failed = 0;
2479 txq->ift_no_tx_dma_setup = txq->ift_txd_encap_efbig = txq->ift_map_failed = 0;
2480 txq->ift_pullups = 0;
2481 ifmp_ring_reset_stats(txq->ift_br);
2482 for (j = 0, di = txq->ift_ifdi; j < sctx->isc_ntxqs; j++, di++)
2483 bzero((void *)di->idi_vaddr, di->idi_size);
2485 for (i = 0; i < scctx->isc_nrxqsets; i++, rxq++) {
2486 /* make sure all transmitters have completed before proceeding XXX */
2488 rxq->ifr_cq_cidx = 0;
2489 for (j = 0, di = rxq->ifr_ifdi; j < sctx->isc_nrxqs; j++, di++)
2490 bzero((void *)di->idi_vaddr, di->idi_size);
2491 /* also resets the free lists pidx/cidx */
2492 for (j = 0, fl = rxq->ifr_fl; j < rxq->ifr_nfl; j++, fl++)
2493 iflib_fl_bufs_free(fl);
2497 static inline caddr_t
2498 calc_next_rxd(iflib_fl_t fl, int cidx)
2502 caddr_t start, end, cur, next;
2504 nrxd = fl->ifl_size;
2505 size = fl->ifl_rxd_size;
2506 start = fl->ifl_ifdi->idi_vaddr;
2508 if (__predict_false(size == 0))
2510 cur = start + size*cidx;
2511 end = start + size*nrxd;
2512 next = CACHE_PTR_NEXT(cur);
2513 return (next < end ? next : start);
2517 prefetch_pkts(iflib_fl_t fl, int cidx)
2520 int nrxd = fl->ifl_size;
2524 nextptr = (cidx + CACHE_PTR_INCREMENT) & (nrxd-1);
2525 prefetch(&fl->ifl_sds.ifsd_m[nextptr]);
2526 prefetch(&fl->ifl_sds.ifsd_cl[nextptr]);
2527 next_rxd = calc_next_rxd(fl, cidx);
2529 prefetch(fl->ifl_sds.ifsd_m[(cidx + 1) & (nrxd-1)]);
2530 prefetch(fl->ifl_sds.ifsd_m[(cidx + 2) & (nrxd-1)]);
2531 prefetch(fl->ifl_sds.ifsd_m[(cidx + 3) & (nrxd-1)]);
2532 prefetch(fl->ifl_sds.ifsd_m[(cidx + 4) & (nrxd-1)]);
2533 prefetch(fl->ifl_sds.ifsd_cl[(cidx + 1) & (nrxd-1)]);
2534 prefetch(fl->ifl_sds.ifsd_cl[(cidx + 2) & (nrxd-1)]);
2535 prefetch(fl->ifl_sds.ifsd_cl[(cidx + 3) & (nrxd-1)]);
2536 prefetch(fl->ifl_sds.ifsd_cl[(cidx + 4) & (nrxd-1)]);
2539 static struct mbuf *
2540 rxd_frag_to_sd(iflib_rxq_t rxq, if_rxd_frag_t irf, bool unload, if_rxsd_t sd,
2541 int *pf_rv, if_rxd_info_t ri)
2547 int flid, cidx, len, next;
2550 flid = irf->irf_flid;
2551 cidx = irf->irf_idx;
2552 fl = &rxq->ifr_fl[flid];
2554 m = fl->ifl_sds.ifsd_m[cidx];
2555 sd->ifsd_cl = &fl->ifl_sds.ifsd_cl[cidx];
2558 fl->ifl_m_dequeued++;
2560 if (rxq->ifr_ctx->ifc_flags & IFC_PREFETCH)
2561 prefetch_pkts(fl, cidx);
2562 next = (cidx + CACHE_PTR_INCREMENT) & (fl->ifl_size-1);
2563 prefetch(&fl->ifl_sds.ifsd_map[next]);
2564 map = fl->ifl_sds.ifsd_map[cidx];
2566 bus_dmamap_sync(fl->ifl_buf_tag, map, BUS_DMASYNC_POSTREAD);
2568 if (rxq->pfil != NULL && PFIL_HOOKED_IN(rxq->pfil) && pf_rv != NULL &&
2569 irf->irf_len != 0) {
2570 payload = *sd->ifsd_cl;
2571 payload += ri->iri_pad;
2572 len = ri->iri_len - ri->iri_pad;
2573 *pf_rv = pfil_run_hooks(rxq->pfil, payload, ri->iri_ifp,
2574 len | PFIL_MEMPTR | PFIL_IN, NULL);
2579 * The filter ate it. Everything is recycled.
2584 case PFIL_REALLOCED:
2586 * The filter copied it. Everything is recycled.
2588 m = pfil_mem2mbuf(payload);
2593 * Filter said it was OK, so receive like
2596 fl->ifl_sds.ifsd_m[cidx] = NULL;
2602 fl->ifl_sds.ifsd_m[cidx] = NULL;
2606 if (unload && irf->irf_len != 0)
2607 bus_dmamap_unload(fl->ifl_buf_tag, map);
2608 fl->ifl_cidx = (fl->ifl_cidx + 1) & (fl->ifl_size-1);
2609 if (__predict_false(fl->ifl_cidx == 0))
2611 bit_clear(fl->ifl_rx_bitmap, cidx);
2615 static struct mbuf *
2616 assemble_segments(iflib_rxq_t rxq, if_rxd_info_t ri, if_rxsd_t sd, int *pf_rv)
2618 struct mbuf *m, *mh, *mt;
2620 int *pf_rv_ptr, flags, i, padlen;
2629 m = rxd_frag_to_sd(rxq, &ri->iri_frags[i], !consumed, sd,
2632 MPASS(*sd->ifsd_cl != NULL);
2635 * Exclude zero-length frags & frags from
2636 * packets the filter has consumed or dropped
2638 if (ri->iri_frags[i].irf_len == 0 || consumed ||
2639 *pf_rv == PFIL_CONSUMED || *pf_rv == PFIL_DROPPED) {
2641 /* everything saved here */
2646 /* XXX we can save the cluster here, but not the mbuf */
2647 m_init(m, M_NOWAIT, MT_DATA, 0);
2652 flags = M_PKTHDR|M_EXT;
2654 padlen = ri->iri_pad;
2659 /* assuming padding is only on the first fragment */
2663 *sd->ifsd_cl = NULL;
2665 /* Can these two be made one ? */
2666 m_init(m, M_NOWAIT, MT_DATA, flags);
2667 m_cljset(m, cl, sd->ifsd_fl->ifl_cltype);
2669 * These must follow m_init and m_cljset
2671 m->m_data += padlen;
2672 ri->iri_len -= padlen;
2673 m->m_len = ri->iri_frags[i].irf_len;
2674 } while (++i < ri->iri_nfrags);
2680 * Process one software descriptor
2682 static struct mbuf *
2683 iflib_rxd_pkt_get(iflib_rxq_t rxq, if_rxd_info_t ri)
2689 /* should I merge this back in now that the two paths are basically duplicated? */
2690 if (ri->iri_nfrags == 1 &&
2691 ri->iri_frags[0].irf_len != 0 &&
2692 ri->iri_frags[0].irf_len <= MIN(IFLIB_RX_COPY_THRESH, MHLEN)) {
2693 m = rxd_frag_to_sd(rxq, &ri->iri_frags[0], false, &sd,
2695 if (pf_rv != PFIL_PASS && pf_rv != PFIL_REALLOCED)
2697 if (pf_rv == PFIL_PASS) {
2698 m_init(m, M_NOWAIT, MT_DATA, M_PKTHDR);
2699 #ifndef __NO_STRICT_ALIGNMENT
2703 memcpy(m->m_data, *sd.ifsd_cl, ri->iri_len);
2704 m->m_len = ri->iri_frags[0].irf_len;
2707 m = assemble_segments(rxq, ri, &sd, &pf_rv);
2710 if (pf_rv != PFIL_PASS && pf_rv != PFIL_REALLOCED)
2713 m->m_pkthdr.len = ri->iri_len;
2714 m->m_pkthdr.rcvif = ri->iri_ifp;
2715 m->m_flags |= ri->iri_flags;
2716 m->m_pkthdr.ether_vtag = ri->iri_vtag;
2717 m->m_pkthdr.flowid = ri->iri_flowid;
2718 M_HASHTYPE_SET(m, ri->iri_rsstype);
2719 m->m_pkthdr.csum_flags = ri->iri_csum_flags;
2720 m->m_pkthdr.csum_data = ri->iri_csum_data;
2724 #if defined(INET6) || defined(INET)
2726 iflib_get_ip_forwarding(struct lro_ctrl *lc, bool *v4, bool *v6)
2728 CURVNET_SET(lc->ifp->if_vnet);
2730 *v6 = V_ip6_forwarding;
2733 *v4 = V_ipforwarding;
2739 * Returns true if it's possible this packet could be LROed.
2740 * if it returns false, it is guaranteed that tcp_lro_rx()
2741 * would not return zero.
2744 iflib_check_lro_possible(struct mbuf *m, bool v4_forwarding, bool v6_forwarding)
2746 struct ether_header *eh;
2748 eh = mtod(m, struct ether_header *);
2749 switch (eh->ether_type) {
2751 case htons(ETHERTYPE_IPV6):
2752 return (!v6_forwarding);
2755 case htons(ETHERTYPE_IP):
2756 return (!v4_forwarding);
2764 iflib_get_ip_forwarding(struct lro_ctrl *lc __unused, bool *v4 __unused, bool *v6 __unused)
2770 _task_fn_rx_watchdog(void *context)
2772 iflib_rxq_t rxq = context;
2774 GROUPTASK_ENQUEUE(&rxq->ifr_task);
2778 iflib_rxeof(iflib_rxq_t rxq, qidx_t budget)
2781 if_ctx_t ctx = rxq->ifr_ctx;
2782 if_shared_ctx_t sctx = ctx->ifc_sctx;
2783 if_softc_ctx_t scctx = &ctx->ifc_softc_ctx;
2786 struct if_rxd_info ri;
2787 int err, budget_left, rx_bytes, rx_pkts;
2790 bool v4_forwarding, v6_forwarding, lro_possible;
2794 * XXX early demux data packets so that if_input processing only handles
2795 * acks in interrupt context
2797 struct mbuf *m, *mh, *mt, *mf;
2801 lro_possible = v4_forwarding = v6_forwarding = false;
2805 rx_pkts = rx_bytes = 0;
2806 if (sctx->isc_flags & IFLIB_HAS_RXCQ)
2807 cidxp = &rxq->ifr_cq_cidx;
2809 cidxp = &rxq->ifr_fl[0].ifl_cidx;
2810 if ((avail = iflib_rxd_avail(ctx, rxq, *cidxp, budget)) == 0) {
2811 for (i = 0, fl = &rxq->ifr_fl[0]; i < sctx->isc_nfl; i++, fl++)
2812 retval |= __iflib_fl_refill_all(ctx, fl);
2813 DBG_COUNTER_INC(rx_unavail);
2817 /* pfil needs the vnet to be set */
2818 CURVNET_SET_QUIET(ifp->if_vnet);
2819 for (budget_left = budget; budget_left > 0 && avail > 0;) {
2820 if (__predict_false(!CTX_ACTIVE(ctx))) {
2821 DBG_COUNTER_INC(rx_ctx_inactive);
2825 * Reset client set fields to their default values
2828 ri.iri_qsidx = rxq->ifr_id;
2829 ri.iri_cidx = *cidxp;
2831 ri.iri_frags = rxq->ifr_frags;
2832 err = ctx->isc_rxd_pkt_get(ctx->ifc_softc, &ri);
2837 rx_bytes += ri.iri_len;
2838 if (sctx->isc_flags & IFLIB_HAS_RXCQ) {
2839 *cidxp = ri.iri_cidx;
2840 /* Update our consumer index */
2841 /* XXX NB: shurd - check if this is still safe */
2842 while (rxq->ifr_cq_cidx >= scctx->isc_nrxd[0])
2843 rxq->ifr_cq_cidx -= scctx->isc_nrxd[0];
2844 /* was this only a completion queue message? */
2845 if (__predict_false(ri.iri_nfrags == 0))
2848 MPASS(ri.iri_nfrags != 0);
2849 MPASS(ri.iri_len != 0);
2851 /* will advance the cidx on the corresponding free lists */
2852 m = iflib_rxd_pkt_get(rxq, &ri);
2855 if (avail == 0 && budget_left)
2856 avail = iflib_rxd_avail(ctx, rxq, *cidxp, budget_left);
2858 if (__predict_false(m == NULL))
2861 /* imm_pkt: -- cxgb */
2870 /* make sure that we can refill faster than drain */
2871 for (i = 0, fl = &rxq->ifr_fl[0]; i < sctx->isc_nfl; i++, fl++)
2872 retval |= __iflib_fl_refill_all(ctx, fl);
2874 lro_enabled = (if_getcapenable(ifp) & IFCAP_LRO);
2876 iflib_get_ip_forwarding(&rxq->ifr_lc, &v4_forwarding, &v6_forwarding);
2878 while (mh != NULL) {
2881 m->m_nextpkt = NULL;
2882 #ifndef __NO_STRICT_ALIGNMENT
2883 if (!IP_ALIGNED(m) && (m = iflib_fixup_rx(m)) == NULL)
2886 rx_bytes += m->m_pkthdr.len;
2888 #if defined(INET6) || defined(INET)
2890 if (!lro_possible) {
2891 lro_possible = iflib_check_lro_possible(m, v4_forwarding, v6_forwarding);
2892 if (lro_possible && mf != NULL) {
2893 ifp->if_input(ifp, mf);
2894 DBG_COUNTER_INC(rx_if_input);
2898 if ((m->m_pkthdr.csum_flags & (CSUM_L4_CALC|CSUM_L4_VALID)) ==
2899 (CSUM_L4_CALC|CSUM_L4_VALID)) {
2900 if (lro_possible && tcp_lro_rx(&rxq->ifr_lc, m, 0) == 0)
2906 ifp->if_input(ifp, m);
2907 DBG_COUNTER_INC(rx_if_input);
2918 ifp->if_input(ifp, mf);
2919 DBG_COUNTER_INC(rx_if_input);
2922 if_inc_counter(ifp, IFCOUNTER_IBYTES, rx_bytes);
2923 if_inc_counter(ifp, IFCOUNTER_IPACKETS, rx_pkts);
2926 * Flush any outstanding LRO work
2928 #if defined(INET6) || defined(INET)
2929 tcp_lro_flush_all(&rxq->ifr_lc);
2931 if (avail != 0 || iflib_rxd_avail(ctx, rxq, *cidxp, 1) != 0)
2932 retval |= IFLIB_RXEOF_MORE;
2936 ctx->ifc_flags |= IFC_DO_RESET;
2937 iflib_admin_intr_deferred(ctx);
2942 #define TXD_NOTIFY_COUNT(txq) (((txq)->ift_size / (txq)->ift_update_freq)-1)
2943 static inline qidx_t
2944 txq_max_db_deferred(iflib_txq_t txq, qidx_t in_use)
2946 qidx_t notify_count = TXD_NOTIFY_COUNT(txq);
2947 qidx_t minthresh = txq->ift_size / 8;
2948 if (in_use > 4*minthresh)
2949 return (notify_count);
2950 if (in_use > 2*minthresh)
2951 return (notify_count >> 1);
2952 if (in_use > minthresh)
2953 return (notify_count >> 3);
2957 static inline qidx_t
2958 txq_max_rs_deferred(iflib_txq_t txq)
2960 qidx_t notify_count = TXD_NOTIFY_COUNT(txq);
2961 qidx_t minthresh = txq->ift_size / 8;
2962 if (txq->ift_in_use > 4*minthresh)
2963 return (notify_count);
2964 if (txq->ift_in_use > 2*minthresh)
2965 return (notify_count >> 1);
2966 if (txq->ift_in_use > minthresh)
2967 return (notify_count >> 2);
2971 #define M_CSUM_FLAGS(m) ((m)->m_pkthdr.csum_flags)
2972 #define M_HAS_VLANTAG(m) (m->m_flags & M_VLANTAG)
2974 #define TXQ_MAX_DB_DEFERRED(txq, in_use) txq_max_db_deferred((txq), (in_use))
2975 #define TXQ_MAX_RS_DEFERRED(txq) txq_max_rs_deferred(txq)
2976 #define TXQ_MAX_DB_CONSUMED(size) (size >> 4)
2978 /* forward compatibility for cxgb */
2979 #define FIRST_QSET(ctx) 0
2980 #define NTXQSETS(ctx) ((ctx)->ifc_softc_ctx.isc_ntxqsets)
2981 #define NRXQSETS(ctx) ((ctx)->ifc_softc_ctx.isc_nrxqsets)
2982 #define QIDX(ctx, m) ((((m)->m_pkthdr.flowid & ctx->ifc_softc_ctx.isc_rss_table_mask) % NTXQSETS(ctx)) + FIRST_QSET(ctx))
2983 #define DESC_RECLAIMABLE(q) ((int)((q)->ift_processed - (q)->ift_cleaned - (q)->ift_ctx->ifc_softc_ctx.isc_tx_nsegments))
2985 /* XXX we should be setting this to something other than zero */
2986 #define RECLAIM_THRESH(ctx) ((ctx)->ifc_sctx->isc_tx_reclaim_thresh)
2987 #define MAX_TX_DESC(ctx) max((ctx)->ifc_softc_ctx.isc_tx_tso_segments_max, \
2988 (ctx)->ifc_softc_ctx.isc_tx_nsegments)
2991 iflib_txd_db_check(if_ctx_t ctx, iflib_txq_t txq, int ring, qidx_t in_use)
2997 max = TXQ_MAX_DB_DEFERRED(txq, in_use);
2998 if (ring || txq->ift_db_pending >= max) {
2999 dbval = txq->ift_npending ? txq->ift_npending : txq->ift_pidx;
3000 bus_dmamap_sync(txq->ift_ifdi->idi_tag, txq->ift_ifdi->idi_map,
3001 BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
3002 ctx->isc_txd_flush(ctx->ifc_softc, txq->ift_id, dbval);
3003 txq->ift_db_pending = txq->ift_npending = 0;
3011 print_pkt(if_pkt_info_t pi)
3013 printf("pi len: %d qsidx: %d nsegs: %d ndescs: %d flags: %x pidx: %d\n",
3014 pi->ipi_len, pi->ipi_qsidx, pi->ipi_nsegs, pi->ipi_ndescs, pi->ipi_flags, pi->ipi_pidx);
3015 printf("pi new_pidx: %d csum_flags: %lx tso_segsz: %d mflags: %x vtag: %d\n",
3016 pi->ipi_new_pidx, pi->ipi_csum_flags, pi->ipi_tso_segsz, pi->ipi_mflags, pi->ipi_vtag);
3017 printf("pi etype: %d ehdrlen: %d ip_hlen: %d ipproto: %d\n",
3018 pi->ipi_etype, pi->ipi_ehdrlen, pi->ipi_ip_hlen, pi->ipi_ipproto);
3022 #define IS_TSO4(pi) ((pi)->ipi_csum_flags & CSUM_IP_TSO)
3023 #define IS_TX_OFFLOAD4(pi) ((pi)->ipi_csum_flags & (CSUM_IP_TCP | CSUM_IP_TSO))
3024 #define IS_TSO6(pi) ((pi)->ipi_csum_flags & CSUM_IP6_TSO)
3025 #define IS_TX_OFFLOAD6(pi) ((pi)->ipi_csum_flags & (CSUM_IP6_TCP | CSUM_IP6_TSO))
3028 iflib_parse_header(iflib_txq_t txq, if_pkt_info_t pi, struct mbuf **mp)
3030 if_shared_ctx_t sctx = txq->ift_ctx->ifc_sctx;
3031 struct ether_vlan_header *eh;
3035 if ((sctx->isc_flags & IFLIB_NEED_SCRATCH) &&
3036 M_WRITABLE(m) == 0) {
3037 if ((m = m_dup(m, M_NOWAIT)) == NULL) {
3041 DBG_COUNTER_INC(tx_frees);
3047 * Determine where frame payload starts.
3048 * Jump over vlan headers if already present,
3049 * helpful for QinQ too.
3051 if (__predict_false(m->m_len < sizeof(*eh))) {
3053 if (__predict_false((m = m_pullup(m, sizeof(*eh))) == NULL))
3056 eh = mtod(m, struct ether_vlan_header *);
3057 if (eh->evl_encap_proto == htons(ETHERTYPE_VLAN)) {
3058 pi->ipi_etype = ntohs(eh->evl_proto);
3059 pi->ipi_ehdrlen = ETHER_HDR_LEN + ETHER_VLAN_ENCAP_LEN;
3061 pi->ipi_etype = ntohs(eh->evl_encap_proto);
3062 pi->ipi_ehdrlen = ETHER_HDR_LEN;
3065 switch (pi->ipi_etype) {
3070 struct ip *ip = NULL;
3071 struct tcphdr *th = NULL;
3074 minthlen = min(m->m_pkthdr.len, pi->ipi_ehdrlen + sizeof(*ip) + sizeof(*th));
3075 if (__predict_false(m->m_len < minthlen)) {
3077 * if this code bloat is causing too much of a hit
3078 * move it to a separate function and mark it noinline
3080 if (m->m_len == pi->ipi_ehdrlen) {
3083 if (n->m_len >= sizeof(*ip)) {
3084 ip = (struct ip *)n->m_data;
3085 if (n->m_len >= (ip->ip_hl << 2) + sizeof(*th))
3086 th = (struct tcphdr *)((caddr_t)ip + (ip->ip_hl << 2));
3089 if (__predict_false((m = m_pullup(m, minthlen)) == NULL))
3091 ip = (struct ip *)(m->m_data + pi->ipi_ehdrlen);
3095 if (__predict_false((m = m_pullup(m, minthlen)) == NULL))
3097 ip = (struct ip *)(m->m_data + pi->ipi_ehdrlen);
3098 if (m->m_len >= (ip->ip_hl << 2) + sizeof(*th))
3099 th = (struct tcphdr *)((caddr_t)ip + (ip->ip_hl << 2));
3102 ip = (struct ip *)(m->m_data + pi->ipi_ehdrlen);
3103 if (m->m_len >= (ip->ip_hl << 2) + sizeof(*th))
3104 th = (struct tcphdr *)((caddr_t)ip + (ip->ip_hl << 2));
3106 pi->ipi_ip_hlen = ip->ip_hl << 2;
3107 pi->ipi_ipproto = ip->ip_p;
3108 pi->ipi_flags |= IPI_TX_IPV4;
3110 /* TCP checksum offload may require TCP header length */
3111 if (IS_TX_OFFLOAD4(pi)) {
3112 if (__predict_true(pi->ipi_ipproto == IPPROTO_TCP)) {
3113 if (__predict_false(th == NULL)) {
3115 if (__predict_false((m = m_pullup(m, (ip->ip_hl << 2) + sizeof(*th))) == NULL))
3117 th = (struct tcphdr *)((caddr_t)ip + pi->ipi_ip_hlen);
3119 pi->ipi_tcp_hflags = th->th_flags;
3120 pi->ipi_tcp_hlen = th->th_off << 2;
3121 pi->ipi_tcp_seq = th->th_seq;
3124 if (__predict_false(ip->ip_p != IPPROTO_TCP))
3127 * TSO always requires hardware checksum offload.
3129 pi->ipi_csum_flags |= (CSUM_IP_TCP | CSUM_IP);
3130 th->th_sum = in_pseudo(ip->ip_src.s_addr,
3131 ip->ip_dst.s_addr, htons(IPPROTO_TCP));
3132 pi->ipi_tso_segsz = m->m_pkthdr.tso_segsz;
3133 if (sctx->isc_flags & IFLIB_TSO_INIT_IP) {
3135 ip->ip_len = htons(pi->ipi_ip_hlen + pi->ipi_tcp_hlen + pi->ipi_tso_segsz);
3139 if ((sctx->isc_flags & IFLIB_NEED_ZERO_CSUM) && (pi->ipi_csum_flags & CSUM_IP))
3146 case ETHERTYPE_IPV6:
3148 struct ip6_hdr *ip6 = (struct ip6_hdr *)(m->m_data + pi->ipi_ehdrlen);
3150 pi->ipi_ip_hlen = sizeof(struct ip6_hdr);
3152 if (__predict_false(m->m_len < pi->ipi_ehdrlen + sizeof(struct ip6_hdr))) {
3154 if (__predict_false((m = m_pullup(m, pi->ipi_ehdrlen + sizeof(struct ip6_hdr))) == NULL))
3157 th = (struct tcphdr *)((caddr_t)ip6 + pi->ipi_ip_hlen);
3159 /* XXX-BZ this will go badly in case of ext hdrs. */
3160 pi->ipi_ipproto = ip6->ip6_nxt;
3161 pi->ipi_flags |= IPI_TX_IPV6;
3163 /* TCP checksum offload may require TCP header length */
3164 if (IS_TX_OFFLOAD6(pi)) {
3165 if (pi->ipi_ipproto == IPPROTO_TCP) {
3166 if (__predict_false(m->m_len < pi->ipi_ehdrlen + sizeof(struct ip6_hdr) + sizeof(struct tcphdr))) {
3168 if (__predict_false((m = m_pullup(m, pi->ipi_ehdrlen + sizeof(struct ip6_hdr) + sizeof(struct tcphdr))) == NULL))
3171 pi->ipi_tcp_hflags = th->th_flags;
3172 pi->ipi_tcp_hlen = th->th_off << 2;
3173 pi->ipi_tcp_seq = th->th_seq;
3176 if (__predict_false(ip6->ip6_nxt != IPPROTO_TCP))
3179 * TSO always requires hardware checksum offload.
3181 pi->ipi_csum_flags |= CSUM_IP6_TCP;
3182 th->th_sum = in6_cksum_pseudo(ip6, 0, IPPROTO_TCP, 0);
3183 pi->ipi_tso_segsz = m->m_pkthdr.tso_segsz;
3190 pi->ipi_csum_flags &= ~CSUM_OFFLOAD;
3191 pi->ipi_ip_hlen = 0;
3200 * If dodgy hardware rejects the scatter gather chain we've handed it
3201 * we'll need to remove the mbuf chain from ifsg_m[] before we can add the
3204 static __noinline struct mbuf *
3205 iflib_remove_mbuf(iflib_txq_t txq)
3208 struct mbuf *m, **ifsd_m;
3210 ifsd_m = txq->ift_sds.ifsd_m;
3211 ntxd = txq->ift_size;
3212 pidx = txq->ift_pidx & (ntxd - 1);
3213 ifsd_m = txq->ift_sds.ifsd_m;
3215 ifsd_m[pidx] = NULL;
3216 bus_dmamap_unload(txq->ift_buf_tag, txq->ift_sds.ifsd_map[pidx]);
3217 if (txq->ift_sds.ifsd_tso_map != NULL)
3218 bus_dmamap_unload(txq->ift_tso_buf_tag,
3219 txq->ift_sds.ifsd_tso_map[pidx]);
3221 txq->ift_dequeued++;
3226 static inline caddr_t
3227 calc_next_txd(iflib_txq_t txq, int cidx, uint8_t qid)
3231 caddr_t start, end, cur, next;
3233 ntxd = txq->ift_size;
3234 size = txq->ift_txd_size[qid];
3235 start = txq->ift_ifdi[qid].idi_vaddr;
3237 if (__predict_false(size == 0))
3239 cur = start + size*cidx;
3240 end = start + size*ntxd;
3241 next = CACHE_PTR_NEXT(cur);
3242 return (next < end ? next : start);
3246 * Pad an mbuf to ensure a minimum ethernet frame size.
3247 * min_frame_size is the frame size (less CRC) to pad the mbuf to
3249 static __noinline int
3250 iflib_ether_pad(device_t dev, struct mbuf **m_head, uint16_t min_frame_size)
3253 * 18 is enough bytes to pad an ARP packet to 46 bytes, and
3254 * and ARP message is the smallest common payload I can think of
3256 static char pad[18]; /* just zeros */
3258 struct mbuf *new_head;
3260 if (!M_WRITABLE(*m_head)) {
3261 new_head = m_dup(*m_head, M_NOWAIT);
3262 if (new_head == NULL) {
3264 device_printf(dev, "cannot pad short frame, m_dup() failed");
3265 DBG_COUNTER_INC(encap_pad_mbuf_fail);
3266 DBG_COUNTER_INC(tx_frees);
3273 for (n = min_frame_size - (*m_head)->m_pkthdr.len;
3274 n > 0; n -= sizeof(pad))
3275 if (!m_append(*m_head, min(n, sizeof(pad)), pad))
3280 device_printf(dev, "cannot pad short frame\n");
3281 DBG_COUNTER_INC(encap_pad_mbuf_fail);
3282 DBG_COUNTER_INC(tx_frees);
3290 iflib_encap(iflib_txq_t txq, struct mbuf **m_headp)
3293 if_shared_ctx_t sctx;
3294 if_softc_ctx_t scctx;
3295 bus_dma_tag_t buf_tag;
3296 bus_dma_segment_t *segs;
3297 struct mbuf *m_head, **ifsd_m;
3300 struct if_pkt_info pi;
3302 int err, nsegs, ndesc, max_segs, pidx, cidx, next, ntxd;
3305 sctx = ctx->ifc_sctx;
3306 scctx = &ctx->ifc_softc_ctx;
3307 segs = txq->ift_segs;
3308 ntxd = txq->ift_size;
3313 * If we're doing TSO the next descriptor to clean may be quite far ahead
3315 cidx = txq->ift_cidx;
3316 pidx = txq->ift_pidx;
3317 if (ctx->ifc_flags & IFC_PREFETCH) {
3318 next = (cidx + CACHE_PTR_INCREMENT) & (ntxd-1);
3319 if (!(ctx->ifc_flags & IFLIB_HAS_TXCQ)) {
3320 next_txd = calc_next_txd(txq, cidx, 0);
3324 /* prefetch the next cache line of mbuf pointers and flags */
3325 prefetch(&txq->ift_sds.ifsd_m[next]);
3326 prefetch(&txq->ift_sds.ifsd_map[next]);
3327 next = (cidx + CACHE_LINE_SIZE) & (ntxd-1);
3329 map = txq->ift_sds.ifsd_map[pidx];
3330 ifsd_m = txq->ift_sds.ifsd_m;
3332 if (m_head->m_pkthdr.csum_flags & CSUM_TSO) {
3333 buf_tag = txq->ift_tso_buf_tag;
3334 max_segs = scctx->isc_tx_tso_segments_max;
3335 map = txq->ift_sds.ifsd_tso_map[pidx];
3336 MPASS(buf_tag != NULL);
3337 MPASS(max_segs > 0);
3339 buf_tag = txq->ift_buf_tag;
3340 max_segs = scctx->isc_tx_nsegments;
3341 map = txq->ift_sds.ifsd_map[pidx];
3343 if ((sctx->isc_flags & IFLIB_NEED_ETHER_PAD) &&
3344 __predict_false(m_head->m_pkthdr.len < scctx->isc_min_frame_size)) {
3345 err = iflib_ether_pad(ctx->ifc_dev, m_headp, scctx->isc_min_frame_size);
3347 DBG_COUNTER_INC(encap_txd_encap_fail);
3354 pi.ipi_mflags = (m_head->m_flags & (M_VLANTAG|M_BCAST|M_MCAST));
3356 pi.ipi_qsidx = txq->ift_id;
3357 pi.ipi_len = m_head->m_pkthdr.len;
3358 pi.ipi_csum_flags = m_head->m_pkthdr.csum_flags;
3359 pi.ipi_vtag = M_HAS_VLANTAG(m_head) ? m_head->m_pkthdr.ether_vtag : 0;
3361 /* deliberate bitwise OR to make one condition */
3362 if (__predict_true((pi.ipi_csum_flags | pi.ipi_vtag))) {
3363 if (__predict_false((err = iflib_parse_header(txq, &pi, m_headp)) != 0)) {
3364 DBG_COUNTER_INC(encap_txd_encap_fail);
3371 err = bus_dmamap_load_mbuf_sg(buf_tag, map, m_head, segs, &nsegs,
3374 if (__predict_false(err)) {
3377 /* try collapse once and defrag once */
3379 m_head = m_collapse(*m_headp, M_NOWAIT, max_segs);
3380 /* try defrag if collapsing fails */
3385 txq->ift_mbuf_defrag++;
3386 m_head = m_defrag(*m_headp, M_NOWAIT);
3389 * remap should never be >1 unless bus_dmamap_load_mbuf_sg
3390 * failed to map an mbuf that was run through m_defrag
3393 if (__predict_false(m_head == NULL || remap > 1))
3400 txq->ift_no_tx_dma_setup++;
3403 txq->ift_no_tx_dma_setup++;
3405 DBG_COUNTER_INC(tx_frees);
3409 txq->ift_map_failed++;
3410 DBG_COUNTER_INC(encap_load_mbuf_fail);
3411 DBG_COUNTER_INC(encap_txd_encap_fail);
3414 ifsd_m[pidx] = m_head;
3416 * XXX assumes a 1 to 1 relationship between segments and
3417 * descriptors - this does not hold true on all drivers, e.g.
3420 if (__predict_false(nsegs + 2 > TXQ_AVAIL(txq))) {
3421 txq->ift_no_desc_avail++;
3422 bus_dmamap_unload(buf_tag, map);
3423 DBG_COUNTER_INC(encap_txq_avail_fail);
3424 DBG_COUNTER_INC(encap_txd_encap_fail);
3425 if ((txq->ift_task.gt_task.ta_flags & TASK_ENQUEUED) == 0)
3426 GROUPTASK_ENQUEUE(&txq->ift_task);
3430 * On Intel cards we can greatly reduce the number of TX interrupts
3431 * we see by only setting report status on every Nth descriptor.
3432 * However, this also means that the driver will need to keep track
3433 * of the descriptors that RS was set on to check them for the DD bit.
3435 txq->ift_rs_pending += nsegs + 1;
3436 if (txq->ift_rs_pending > TXQ_MAX_RS_DEFERRED(txq) ||
3437 iflib_no_tx_batch || (TXQ_AVAIL(txq) - nsegs) <= MAX_TX_DESC(ctx) + 2) {
3438 pi.ipi_flags |= IPI_TX_INTR;
3439 txq->ift_rs_pending = 0;
3443 pi.ipi_nsegs = nsegs;
3445 MPASS(pidx >= 0 && pidx < txq->ift_size);
3449 if ((err = ctx->isc_txd_encap(ctx->ifc_softc, &pi)) == 0) {
3450 bus_dmamap_sync(buf_tag, map, BUS_DMASYNC_PREWRITE);
3451 DBG_COUNTER_INC(tx_encap);
3452 MPASS(pi.ipi_new_pidx < txq->ift_size);
3454 ndesc = pi.ipi_new_pidx - pi.ipi_pidx;
3455 if (pi.ipi_new_pidx < pi.ipi_pidx) {
3456 ndesc += txq->ift_size;
3460 * drivers can need as many as
3463 MPASS(ndesc <= pi.ipi_nsegs + 2);
3464 MPASS(pi.ipi_new_pidx != pidx);
3466 txq->ift_in_use += ndesc;
3469 * We update the last software descriptor again here because there may
3470 * be a sentinel and/or there may be more mbufs than segments
3472 txq->ift_pidx = pi.ipi_new_pidx;
3473 txq->ift_npending += pi.ipi_ndescs;
3475 *m_headp = m_head = iflib_remove_mbuf(txq);
3477 txq->ift_txd_encap_efbig++;
3486 * err can't possibly be non-zero here, so we don't neet to test it
3487 * to see if we need to DBG_COUNTER_INC(encap_txd_encap_fail).
3492 txq->ift_mbuf_defrag_failed++;
3493 txq->ift_map_failed++;
3495 DBG_COUNTER_INC(tx_frees);
3497 DBG_COUNTER_INC(encap_txd_encap_fail);
3502 iflib_tx_desc_free(iflib_txq_t txq, int n)
3504 uint32_t qsize, cidx, mask, gen;
3505 struct mbuf *m, **ifsd_m;
3508 cidx = txq->ift_cidx;
3510 qsize = txq->ift_size;
3512 ifsd_m = txq->ift_sds.ifsd_m;
3513 do_prefetch = (txq->ift_ctx->ifc_flags & IFC_PREFETCH);
3517 prefetch(ifsd_m[(cidx + 3) & mask]);
3518 prefetch(ifsd_m[(cidx + 4) & mask]);
3520 if ((m = ifsd_m[cidx]) != NULL) {
3521 prefetch(&ifsd_m[(cidx + CACHE_PTR_INCREMENT) & mask]);
3522 if (m->m_pkthdr.csum_flags & CSUM_TSO) {
3523 bus_dmamap_sync(txq->ift_tso_buf_tag,
3524 txq->ift_sds.ifsd_tso_map[cidx],
3525 BUS_DMASYNC_POSTWRITE);
3526 bus_dmamap_unload(txq->ift_tso_buf_tag,
3527 txq->ift_sds.ifsd_tso_map[cidx]);
3529 bus_dmamap_sync(txq->ift_buf_tag,
3530 txq->ift_sds.ifsd_map[cidx],
3531 BUS_DMASYNC_POSTWRITE);
3532 bus_dmamap_unload(txq->ift_buf_tag,
3533 txq->ift_sds.ifsd_map[cidx]);
3535 /* XXX we don't support any drivers that batch packets yet */
3536 MPASS(m->m_nextpkt == NULL);
3538 ifsd_m[cidx] = NULL;
3540 txq->ift_dequeued++;
3542 DBG_COUNTER_INC(tx_frees);
3544 if (__predict_false(++cidx == qsize)) {
3549 txq->ift_cidx = cidx;
3554 iflib_completed_tx_reclaim(iflib_txq_t txq, int thresh)
3557 if_ctx_t ctx = txq->ift_ctx;
3559 KASSERT(thresh >= 0, ("invalid threshold to reclaim"));
3560 MPASS(thresh /*+ MAX_TX_DESC(txq->ift_ctx) */ < txq->ift_size);
3563 * Need a rate-limiting check so that this isn't called every time
3565 iflib_tx_credits_update(ctx, txq);
3566 reclaim = DESC_RECLAIMABLE(txq);
3568 if (reclaim <= thresh /* + MAX_TX_DESC(txq->ift_ctx) */) {
3570 if (iflib_verbose_debug) {
3571 printf("%s processed=%ju cleaned=%ju tx_nsegments=%d reclaim=%d thresh=%d\n", __FUNCTION__,
3572 txq->ift_processed, txq->ift_cleaned, txq->ift_ctx->ifc_softc_ctx.isc_tx_nsegments,
3579 iflib_tx_desc_free(txq, reclaim);
3580 txq->ift_cleaned += reclaim;
3581 txq->ift_in_use -= reclaim;
3586 static struct mbuf **
3587 _ring_peek_one(struct ifmp_ring *r, int cidx, int offset, int remaining)
3590 struct mbuf **items;
3593 next = (cidx + CACHE_PTR_INCREMENT) & (size-1);
3594 items = __DEVOLATILE(struct mbuf **, &r->items[0]);
3596 prefetch(items[(cidx + offset) & (size-1)]);
3597 if (remaining > 1) {
3598 prefetch2cachelines(&items[next]);
3599 prefetch2cachelines(items[(cidx + offset + 1) & (size-1)]);
3600 prefetch2cachelines(items[(cidx + offset + 2) & (size-1)]);
3601 prefetch2cachelines(items[(cidx + offset + 3) & (size-1)]);
3603 return (__DEVOLATILE(struct mbuf **, &r->items[(cidx + offset) & (size-1)]));
3607 iflib_txq_check_drain(iflib_txq_t txq, int budget)
3610 ifmp_ring_check_drainage(txq->ift_br, budget);
3614 iflib_txq_can_drain(struct ifmp_ring *r)
3616 iflib_txq_t txq = r->cookie;
3617 if_ctx_t ctx = txq->ift_ctx;
3619 if (TXQ_AVAIL(txq) > MAX_TX_DESC(ctx) + 2)
3621 bus_dmamap_sync(txq->ift_ifdi->idi_tag, txq->ift_ifdi->idi_map,
3622 BUS_DMASYNC_POSTREAD);
3623 return (ctx->isc_txd_credits_update(ctx->ifc_softc, txq->ift_id,
3628 iflib_txq_drain(struct ifmp_ring *r, uint32_t cidx, uint32_t pidx)
3630 iflib_txq_t txq = r->cookie;
3631 if_ctx_t ctx = txq->ift_ctx;
3632 if_t ifp = ctx->ifc_ifp;
3633 struct mbuf *m, **mp;
3634 int avail, bytes_sent, consumed, count, err, i, in_use_prev;
3635 int mcast_sent, pkt_sent, reclaimed, txq_avail;
3636 bool do_prefetch, rang, ring;
3638 if (__predict_false(!(if_getdrvflags(ifp) & IFF_DRV_RUNNING) ||
3639 !LINK_ACTIVE(ctx))) {
3640 DBG_COUNTER_INC(txq_drain_notready);
3643 reclaimed = iflib_completed_tx_reclaim(txq, RECLAIM_THRESH(ctx));
3644 rang = iflib_txd_db_check(ctx, txq, reclaimed, txq->ift_in_use);
3645 avail = IDXDIFF(pidx, cidx, r->size);
3646 if (__predict_false(ctx->ifc_flags & IFC_QFLUSH)) {
3647 DBG_COUNTER_INC(txq_drain_flushing);
3648 for (i = 0; i < avail; i++) {
3649 if (__predict_true(r->items[(cidx + i) & (r->size-1)] != (void *)txq))
3650 m_free(r->items[(cidx + i) & (r->size-1)]);
3651 r->items[(cidx + i) & (r->size-1)] = NULL;
3656 if (__predict_false(if_getdrvflags(ctx->ifc_ifp) & IFF_DRV_OACTIVE)) {
3657 txq->ift_qstatus = IFLIB_QUEUE_IDLE;
3659 callout_stop(&txq->ift_timer);
3660 CALLOUT_UNLOCK(txq);
3661 DBG_COUNTER_INC(txq_drain_oactive);
3665 txq->ift_qstatus = IFLIB_QUEUE_IDLE;
3666 consumed = mcast_sent = bytes_sent = pkt_sent = 0;
3667 count = MIN(avail, TX_BATCH_SIZE);
3669 if (iflib_verbose_debug)
3670 printf("%s avail=%d ifc_flags=%x txq_avail=%d ", __FUNCTION__,
3671 avail, ctx->ifc_flags, TXQ_AVAIL(txq));
3673 do_prefetch = (ctx->ifc_flags & IFC_PREFETCH);
3674 txq_avail = TXQ_AVAIL(txq);
3676 for (i = 0; i < count && txq_avail > MAX_TX_DESC(ctx) + 2; i++) {
3677 int rem = do_prefetch ? count - i : 0;
3679 mp = _ring_peek_one(r, cidx, i, rem);
3680 MPASS(mp != NULL && *mp != NULL);
3681 if (__predict_false(*mp == (struct mbuf *)txq)) {
3685 in_use_prev = txq->ift_in_use;
3686 err = iflib_encap(txq, mp);
3687 if (__predict_false(err)) {
3688 /* no room - bail out */
3692 /* we can't send this packet - skip it */
3698 DBG_COUNTER_INC(tx_sent);
3699 bytes_sent += m->m_pkthdr.len;
3700 mcast_sent += !!(m->m_flags & M_MCAST);
3701 txq_avail = TXQ_AVAIL(txq);
3703 txq->ift_db_pending += (txq->ift_in_use - in_use_prev);
3704 ETHER_BPF_MTAP(ifp, m);
3705 if (__predict_false(!(ifp->if_drv_flags & IFF_DRV_RUNNING)))
3707 rang = iflib_txd_db_check(ctx, txq, false, in_use_prev);
3710 /* deliberate use of bitwise or to avoid gratuitous short-circuit */
3711 ring = rang ? false : (iflib_min_tx_latency | err) || (TXQ_AVAIL(txq) < MAX_TX_DESC(ctx));
3712 iflib_txd_db_check(ctx, txq, ring, txq->ift_in_use);
3713 if_inc_counter(ifp, IFCOUNTER_OBYTES, bytes_sent);
3714 if_inc_counter(ifp, IFCOUNTER_OPACKETS, pkt_sent);
3716 if_inc_counter(ifp, IFCOUNTER_OMCASTS, mcast_sent);
3718 if (iflib_verbose_debug)
3719 printf("consumed=%d\n", consumed);
3725 iflib_txq_drain_always(struct ifmp_ring *r)
3731 iflib_txq_drain_free(struct ifmp_ring *r, uint32_t cidx, uint32_t pidx)
3739 txq->ift_qstatus = IFLIB_QUEUE_IDLE;
3741 callout_stop(&txq->ift_timer);
3742 CALLOUT_UNLOCK(txq);
3744 avail = IDXDIFF(pidx, cidx, r->size);
3745 for (i = 0; i < avail; i++) {
3746 mp = _ring_peek_one(r, cidx, i, avail - i);
3747 if (__predict_false(*mp == (struct mbuf *)txq))
3750 DBG_COUNTER_INC(tx_frees);
3752 MPASS(ifmp_ring_is_stalled(r) == 0);
3757 iflib_ifmp_purge(iflib_txq_t txq)
3759 struct ifmp_ring *r;
3762 r->drain = iflib_txq_drain_free;
3763 r->can_drain = iflib_txq_drain_always;
3765 ifmp_ring_check_drainage(r, r->size);
3767 r->drain = iflib_txq_drain;
3768 r->can_drain = iflib_txq_can_drain;
3772 _task_fn_tx(void *context)
3774 iflib_txq_t txq = context;
3775 if_ctx_t ctx = txq->ift_ctx;
3776 #if defined(ALTQ) || defined(DEV_NETMAP)
3777 if_t ifp = ctx->ifc_ifp;
3779 int abdicate = ctx->ifc_sysctl_tx_abdicate;
3781 #ifdef IFLIB_DIAGNOSTICS
3782 txq->ift_cpu_exec_count[curcpu]++;
3784 if (!(if_getdrvflags(ctx->ifc_ifp) & IFF_DRV_RUNNING))
3787 if (if_getcapenable(ifp) & IFCAP_NETMAP) {
3788 bus_dmamap_sync(txq->ift_ifdi->idi_tag, txq->ift_ifdi->idi_map,
3789 BUS_DMASYNC_POSTREAD);
3790 if (ctx->isc_txd_credits_update(ctx->ifc_softc, txq->ift_id, false))
3791 netmap_tx_irq(ifp, txq->ift_id);
3792 if (ctx->ifc_flags & IFC_LEGACY)
3793 IFDI_INTR_ENABLE(ctx);
3795 IFDI_TX_QUEUE_INTR_ENABLE(ctx, txq->ift_id);
3800 if (ALTQ_IS_ENABLED(&ifp->if_snd))
3801 iflib_altq_if_start(ifp);
3803 if (txq->ift_db_pending)
3804 ifmp_ring_enqueue(txq->ift_br, (void **)&txq, 1, TX_BATCH_SIZE, abdicate);
3806 ifmp_ring_check_drainage(txq->ift_br, TX_BATCH_SIZE);
3808 * When abdicating, we always need to check drainage, not just when we don't enqueue
3811 ifmp_ring_check_drainage(txq->ift_br, TX_BATCH_SIZE);
3812 if (ctx->ifc_flags & IFC_LEGACY)
3813 IFDI_INTR_ENABLE(ctx);
3815 IFDI_TX_QUEUE_INTR_ENABLE(ctx, txq->ift_id);
3819 _task_fn_rx(void *context)
3821 iflib_rxq_t rxq = context;
3822 if_ctx_t ctx = rxq->ifr_ctx;
3826 #ifdef IFLIB_DIAGNOSTICS
3827 rxq->ifr_cpu_exec_count[curcpu]++;
3829 DBG_COUNTER_INC(task_fn_rxs);
3830 if (__predict_false(!(if_getdrvflags(ctx->ifc_ifp) & IFF_DRV_RUNNING)))
3833 if (if_getcapenable(ctx->ifc_ifp) & IFCAP_NETMAP) {
3835 if (netmap_rx_irq(ctx->ifc_ifp, rxq->ifr_id, &work)) {
3841 budget = ctx->ifc_sysctl_rx_budget;
3843 budget = 16; /* XXX */
3844 more = iflib_rxeof(rxq, budget);
3848 if ((more & IFLIB_RXEOF_MORE) == 0) {
3849 if (ctx->ifc_flags & IFC_LEGACY)
3850 IFDI_INTR_ENABLE(ctx);
3852 IFDI_RX_QUEUE_INTR_ENABLE(ctx, rxq->ifr_id);
3853 DBG_COUNTER_INC(rx_intr_enables);
3855 if (__predict_false(!(if_getdrvflags(ctx->ifc_ifp) & IFF_DRV_RUNNING)))
3858 if (more & IFLIB_RXEOF_MORE)
3859 GROUPTASK_ENQUEUE(&rxq->ifr_task);
3860 else if (more & IFLIB_RXEOF_EMPTY)
3861 callout_reset_curcpu(&rxq->ifr_watchdog, 1, &_task_fn_rx_watchdog, rxq);
3865 _task_fn_admin(void *context)
3867 if_ctx_t ctx = context;
3868 if_softc_ctx_t sctx = &ctx->ifc_softc_ctx;
3871 bool oactive, running, do_reset, do_watchdog, in_detach;
3872 uint32_t reset_on = hz / 2;
3875 running = (if_getdrvflags(ctx->ifc_ifp) & IFF_DRV_RUNNING);
3876 oactive = (if_getdrvflags(ctx->ifc_ifp) & IFF_DRV_OACTIVE);
3877 do_reset = (ctx->ifc_flags & IFC_DO_RESET);
3878 do_watchdog = (ctx->ifc_flags & IFC_DO_WATCHDOG);
3879 in_detach = (ctx->ifc_flags & IFC_IN_DETACH);
3880 ctx->ifc_flags &= ~(IFC_DO_RESET|IFC_DO_WATCHDOG);
3883 if ((!running && !oactive) && !(ctx->ifc_sctx->isc_flags & IFLIB_ADMIN_ALWAYS_RUN))
3889 for (txq = ctx->ifc_txqs, i = 0; i < sctx->isc_ntxqsets; i++, txq++) {
3891 callout_stop(&txq->ift_timer);
3892 CALLOUT_UNLOCK(txq);
3895 ctx->ifc_watchdog_events++;
3896 IFDI_WATCHDOG_RESET(ctx);
3898 IFDI_UPDATE_ADMIN_STATUS(ctx);
3899 for (txq = ctx->ifc_txqs, i = 0; i < sctx->isc_ntxqsets; i++, txq++) {
3902 if (if_getcapenable(ctx->ifc_ifp) & IFCAP_NETMAP)
3903 iflib_netmap_timer_adjust(ctx, txq, &reset_on);
3905 callout_reset_on(&txq->ift_timer, reset_on, iflib_timer, txq, txq->ift_timer.c_cpu);
3907 IFDI_LINK_INTR_ENABLE(ctx);
3909 iflib_if_init_locked(ctx);
3912 if (LINK_ACTIVE(ctx) == 0)
3914 for (txq = ctx->ifc_txqs, i = 0; i < sctx->isc_ntxqsets; i++, txq++)
3915 iflib_txq_check_drain(txq, IFLIB_RESTART_BUDGET);
3920 _task_fn_iov(void *context)
3922 if_ctx_t ctx = context;
3924 if (!(if_getdrvflags(ctx->ifc_ifp) & IFF_DRV_RUNNING) &&
3925 !(ctx->ifc_sctx->isc_flags & IFLIB_ADMIN_ALWAYS_RUN))
3929 IFDI_VFLR_HANDLE(ctx);
3934 iflib_sysctl_int_delay(SYSCTL_HANDLER_ARGS)
3937 if_int_delay_info_t info;
3940 info = (if_int_delay_info_t)arg1;
3941 ctx = info->iidi_ctx;
3942 info->iidi_req = req;
3943 info->iidi_oidp = oidp;
3945 err = IFDI_SYSCTL_INT_DELAY(ctx, info);
3950 /*********************************************************************
3954 **********************************************************************/
3957 iflib_if_init_locked(if_ctx_t ctx)
3960 iflib_init_locked(ctx);
3965 iflib_if_init(void *arg)
3970 iflib_if_init_locked(ctx);
3975 iflib_if_transmit(if_t ifp, struct mbuf *m)
3977 if_ctx_t ctx = if_getsoftc(ifp);
3981 int abdicate = ctx->ifc_sysctl_tx_abdicate;
3983 if (__predict_false((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0 || !LINK_ACTIVE(ctx))) {
3984 DBG_COUNTER_INC(tx_frees);
3989 MPASS(m->m_nextpkt == NULL);
3990 /* ALTQ-enabled interfaces always use queue 0. */
3992 if ((NTXQSETS(ctx) > 1) && M_HASHTYPE_GET(m) && !ALTQ_IS_ENABLED(&ifp->if_snd))
3993 qidx = QIDX(ctx, m);
3995 * XXX calculate buf_ring based on flowid (divvy up bits?)
3997 txq = &ctx->ifc_txqs[qidx];
3999 #ifdef DRIVER_BACKPRESSURE
4000 if (txq->ift_closed) {
4002 next = m->m_nextpkt;
4003 m->m_nextpkt = NULL;
4005 DBG_COUNTER_INC(tx_frees);
4017 next = next->m_nextpkt;
4018 } while (next != NULL);
4020 if (count > nitems(marr))
4021 if ((mp = malloc(count*sizeof(struct mbuf *), M_IFLIB, M_NOWAIT)) == NULL) {
4022 /* XXX check nextpkt */
4024 /* XXX simplify for now */
4025 DBG_COUNTER_INC(tx_frees);
4028 for (next = m, i = 0; next != NULL; i++) {
4030 next = next->m_nextpkt;
4031 mp[i]->m_nextpkt = NULL;
4034 DBG_COUNTER_INC(tx_seen);
4035 err = ifmp_ring_enqueue(txq->ift_br, (void **)&m, 1, TX_BATCH_SIZE, abdicate);
4038 GROUPTASK_ENQUEUE(&txq->ift_task);
4041 GROUPTASK_ENQUEUE(&txq->ift_task);
4042 /* support forthcoming later */
4043 #ifdef DRIVER_BACKPRESSURE
4044 txq->ift_closed = TRUE;
4046 ifmp_ring_check_drainage(txq->ift_br, TX_BATCH_SIZE);
4048 DBG_COUNTER_INC(tx_frees);
4056 * The overall approach to integrating iflib with ALTQ is to continue to use
4057 * the iflib mp_ring machinery between the ALTQ queue(s) and the hardware
4058 * ring. Technically, when using ALTQ, queueing to an intermediate mp_ring
4059 * is redundant/unnecessary, but doing so minimizes the amount of
4060 * ALTQ-specific code required in iflib. It is assumed that the overhead of
4061 * redundantly queueing to an intermediate mp_ring is swamped by the
4062 * performance limitations inherent in using ALTQ.
4064 * When ALTQ support is compiled in, all iflib drivers will use a transmit
4065 * routine, iflib_altq_if_transmit(), that checks if ALTQ is enabled for the
4066 * given interface. If ALTQ is enabled for an interface, then all
4067 * transmitted packets for that interface will be submitted to the ALTQ
4068 * subsystem via IFQ_ENQUEUE(). We don't use the legacy if_transmit()
4069 * implementation because it uses IFQ_HANDOFF(), which will duplicatively
4070 * update stats that the iflib machinery handles, and which is sensitve to
4071 * the disused IFF_DRV_OACTIVE flag. Additionally, iflib_altq_if_start()
4072 * will be installed as the start routine for use by ALTQ facilities that
4073 * need to trigger queue drains on a scheduled basis.
4077 iflib_altq_if_start(if_t ifp)
4079 struct ifaltq *ifq = &ifp->if_snd;
4083 IFQ_DEQUEUE_NOLOCK(ifq, m);
4085 iflib_if_transmit(ifp, m);
4086 IFQ_DEQUEUE_NOLOCK(ifq, m);
4092 iflib_altq_if_transmit(if_t ifp, struct mbuf *m)
4096 if (ALTQ_IS_ENABLED(&ifp->if_snd)) {
4097 IFQ_ENQUEUE(&ifp->if_snd, m, err);
4099 iflib_altq_if_start(ifp);
4101 err = iflib_if_transmit(ifp, m);
4108 iflib_if_qflush(if_t ifp)
4110 if_ctx_t ctx = if_getsoftc(ifp);
4111 iflib_txq_t txq = ctx->ifc_txqs;
4115 ctx->ifc_flags |= IFC_QFLUSH;
4117 for (i = 0; i < NTXQSETS(ctx); i++, txq++)
4118 while (!(ifmp_ring_is_idle(txq->ift_br) || ifmp_ring_is_stalled(txq->ift_br)))
4119 iflib_txq_check_drain(txq, 0);
4121 ctx->ifc_flags &= ~IFC_QFLUSH;
4125 * When ALTQ is enabled, this will also take care of purging the
4132 #define IFCAP_FLAGS (IFCAP_HWCSUM_IPV6 | IFCAP_HWCSUM | IFCAP_LRO | \
4133 IFCAP_TSO | IFCAP_VLAN_HWTAGGING | IFCAP_HWSTATS | \
4134 IFCAP_VLAN_MTU | IFCAP_VLAN_HWFILTER | \
4135 IFCAP_VLAN_HWTSO | IFCAP_VLAN_HWCSUM | IFCAP_NOMAP)
4138 iflib_if_ioctl(if_t ifp, u_long command, caddr_t data)
4140 if_ctx_t ctx = if_getsoftc(ifp);
4141 struct ifreq *ifr = (struct ifreq *)data;
4142 #if defined(INET) || defined(INET6)
4143 struct ifaddr *ifa = (struct ifaddr *)data;
4145 bool avoid_reset = false;
4146 int err = 0, reinit = 0, bits;
4151 if (ifa->ifa_addr->sa_family == AF_INET)
4155 if (ifa->ifa_addr->sa_family == AF_INET6)
4159 ** Calling init results in link renegotiation,
4160 ** so we avoid doing it when possible.
4163 if_setflagbits(ifp, IFF_UP,0);
4164 if (!(if_getdrvflags(ifp) & IFF_DRV_RUNNING))
4167 if (!(if_getflags(ifp) & IFF_NOARP))
4168 arp_ifinit(ifp, ifa);
4171 err = ether_ioctl(ifp, command, data);
4175 if (ifr->ifr_mtu == if_getmtu(ifp)) {
4179 bits = if_getdrvflags(ifp);
4180 /* stop the driver and free any clusters before proceeding */
4183 if ((err = IFDI_MTU_SET(ctx, ifr->ifr_mtu)) == 0) {
4185 if (ifr->ifr_mtu > ctx->ifc_max_fl_buf_size)
4186 ctx->ifc_flags |= IFC_MULTISEG;
4188 ctx->ifc_flags &= ~IFC_MULTISEG;
4190 err = if_setmtu(ifp, ifr->ifr_mtu);
4192 iflib_init_locked(ctx);
4194 if_setdrvflags(ifp, bits);
4200 if (if_getflags(ifp) & IFF_UP) {
4201 if (if_getdrvflags(ifp) & IFF_DRV_RUNNING) {
4202 if ((if_getflags(ifp) ^ ctx->ifc_if_flags) &
4203 (IFF_PROMISC | IFF_ALLMULTI)) {
4204 err = IFDI_PROMISC_SET(ctx, if_getflags(ifp));
4208 } else if (if_getdrvflags(ifp) & IFF_DRV_RUNNING) {
4211 ctx->ifc_if_flags = if_getflags(ifp);
4216 if (if_getdrvflags(ifp) & IFF_DRV_RUNNING) {
4218 IFDI_INTR_DISABLE(ctx);
4219 IFDI_MULTI_SET(ctx);
4220 IFDI_INTR_ENABLE(ctx);
4226 IFDI_MEDIA_SET(ctx);
4231 err = ifmedia_ioctl(ifp, ifr, ctx->ifc_mediap, command);
4235 struct ifi2creq i2c;
4237 err = copyin(ifr_data_get_ptr(ifr), &i2c, sizeof(i2c));
4240 if (i2c.dev_addr != 0xA0 && i2c.dev_addr != 0xA2) {
4244 if (i2c.len > sizeof(i2c.data)) {
4249 if ((err = IFDI_I2C_REQ(ctx, &i2c)) == 0)
4250 err = copyout(&i2c, ifr_data_get_ptr(ifr),
4256 int mask, setmask, oldmask;
4258 oldmask = if_getcapenable(ifp);
4259 mask = ifr->ifr_reqcap ^ oldmask;
4260 mask &= ctx->ifc_softc_ctx.isc_capabilities | IFCAP_NOMAP;
4263 setmask |= mask & (IFCAP_TOE4|IFCAP_TOE6);
4265 setmask |= (mask & IFCAP_FLAGS);
4266 setmask |= (mask & IFCAP_WOL);
4269 * If any RX csum has changed, change all the ones that
4270 * are supported by the driver.
4272 if (setmask & (IFCAP_RXCSUM | IFCAP_RXCSUM_IPV6)) {
4273 setmask |= ctx->ifc_softc_ctx.isc_capabilities &
4274 (IFCAP_RXCSUM | IFCAP_RXCSUM_IPV6);
4278 * want to ensure that traffic has stopped before we change any of the flags
4282 bits = if_getdrvflags(ifp);
4283 if (bits & IFF_DRV_RUNNING && setmask & ~IFCAP_WOL)
4286 if_togglecapenable(ifp, setmask);
4288 if (bits & IFF_DRV_RUNNING && setmask & ~IFCAP_WOL)
4289 iflib_init_locked(ctx);
4291 if_setdrvflags(ifp, bits);
4298 case SIOCGPRIVATE_0:
4302 err = IFDI_PRIV_IOCTL(ctx, command, data);
4306 err = ether_ioctl(ifp, command, data);
4315 iflib_if_get_counter(if_t ifp, ift_counter cnt)
4317 if_ctx_t ctx = if_getsoftc(ifp);
4319 return (IFDI_GET_COUNTER(ctx, cnt));
4322 /*********************************************************************
4324 * OTHER FUNCTIONS EXPORTED TO THE STACK
4326 **********************************************************************/
4329 iflib_vlan_register(void *arg, if_t ifp, uint16_t vtag)
4331 if_ctx_t ctx = if_getsoftc(ifp);
4333 if ((void *)ctx != arg)
4336 if ((vtag == 0) || (vtag > 4095))
4339 if (iflib_in_detach(ctx))
4343 IFDI_VLAN_REGISTER(ctx, vtag);
4344 /* Re-init to load the changes */
4345 if (if_getcapenable(ifp) & IFCAP_VLAN_HWFILTER)
4346 iflib_if_init_locked(ctx);
4351 iflib_vlan_unregister(void *arg, if_t ifp, uint16_t vtag)
4353 if_ctx_t ctx = if_getsoftc(ifp);
4355 if ((void *)ctx != arg)
4358 if ((vtag == 0) || (vtag > 4095))
4362 IFDI_VLAN_UNREGISTER(ctx, vtag);
4363 /* Re-init to load the changes */
4364 if (if_getcapenable(ifp) & IFCAP_VLAN_HWFILTER)
4365 iflib_if_init_locked(ctx);
4370 iflib_led_func(void *arg, int onoff)
4375 IFDI_LED_FUNC(ctx, onoff);
4379 /*********************************************************************
4381 * BUS FUNCTION DEFINITIONS
4383 **********************************************************************/
4386 iflib_device_probe(device_t dev)
4388 const pci_vendor_info_t *ent;
4389 if_shared_ctx_t sctx;
4390 uint16_t pci_device_id, pci_rev_id, pci_subdevice_id, pci_subvendor_id;
4391 uint16_t pci_vendor_id;
4393 if ((sctx = DEVICE_REGISTER(dev)) == NULL || sctx->isc_magic != IFLIB_MAGIC)
4396 pci_vendor_id = pci_get_vendor(dev);
4397 pci_device_id = pci_get_device(dev);
4398 pci_subvendor_id = pci_get_subvendor(dev);
4399 pci_subdevice_id = pci_get_subdevice(dev);
4400 pci_rev_id = pci_get_revid(dev);
4401 if (sctx->isc_parse_devinfo != NULL)
4402 sctx->isc_parse_devinfo(&pci_device_id, &pci_subvendor_id, &pci_subdevice_id, &pci_rev_id);
4404 ent = sctx->isc_vendor_info;
4405 while (ent->pvi_vendor_id != 0) {
4406 if (pci_vendor_id != ent->pvi_vendor_id) {
4410 if ((pci_device_id == ent->pvi_device_id) &&
4411 ((pci_subvendor_id == ent->pvi_subvendor_id) ||
4412 (ent->pvi_subvendor_id == 0)) &&
4413 ((pci_subdevice_id == ent->pvi_subdevice_id) ||
4414 (ent->pvi_subdevice_id == 0)) &&
4415 ((pci_rev_id == ent->pvi_rev_id) ||
4416 (ent->pvi_rev_id == 0))) {
4418 device_set_desc_copy(dev, ent->pvi_name);
4419 /* this needs to be changed to zero if the bus probing code
4420 * ever stops re-probing on best match because the sctx
4421 * may have its values over written by register calls
4422 * in subsequent probes
4424 return (BUS_PROBE_DEFAULT);
4432 iflib_device_probe_vendor(device_t dev)
4436 probe = iflib_device_probe(dev);
4437 if (probe == BUS_PROBE_DEFAULT)
4438 return (BUS_PROBE_VENDOR);
4444 iflib_reset_qvalues(if_ctx_t ctx)
4446 if_softc_ctx_t scctx = &ctx->ifc_softc_ctx;
4447 if_shared_ctx_t sctx = ctx->ifc_sctx;
4448 device_t dev = ctx->ifc_dev;
4451 if (ctx->ifc_sysctl_ntxqs != 0)
4452 scctx->isc_ntxqsets = ctx->ifc_sysctl_ntxqs;
4453 if (ctx->ifc_sysctl_nrxqs != 0)
4454 scctx->isc_nrxqsets = ctx->ifc_sysctl_nrxqs;
4456 for (i = 0; i < sctx->isc_ntxqs; i++) {
4457 if (ctx->ifc_sysctl_ntxds[i] != 0)
4458 scctx->isc_ntxd[i] = ctx->ifc_sysctl_ntxds[i];
4460 scctx->isc_ntxd[i] = sctx->isc_ntxd_default[i];
4463 for (i = 0; i < sctx->isc_nrxqs; i++) {
4464 if (ctx->ifc_sysctl_nrxds[i] != 0)
4465 scctx->isc_nrxd[i] = ctx->ifc_sysctl_nrxds[i];
4467 scctx->isc_nrxd[i] = sctx->isc_nrxd_default[i];
4470 for (i = 0; i < sctx->isc_nrxqs; i++) {
4471 if (scctx->isc_nrxd[i] < sctx->isc_nrxd_min[i]) {
4472 device_printf(dev, "nrxd%d: %d less than nrxd_min %d - resetting to min\n",
4473 i, scctx->isc_nrxd[i], sctx->isc_nrxd_min[i]);
4474 scctx->isc_nrxd[i] = sctx->isc_nrxd_min[i];
4476 if (scctx->isc_nrxd[i] > sctx->isc_nrxd_max[i]) {
4477 device_printf(dev, "nrxd%d: %d greater than nrxd_max %d - resetting to max\n",
4478 i, scctx->isc_nrxd[i], sctx->isc_nrxd_max[i]);
4479 scctx->isc_nrxd[i] = sctx->isc_nrxd_max[i];
4481 if (!powerof2(scctx->isc_nrxd[i])) {
4482 device_printf(dev, "nrxd%d: %d is not a power of 2 - using default value of %d\n",
4483 i, scctx->isc_nrxd[i], sctx->isc_nrxd_default[i]);
4484 scctx->isc_nrxd[i] = sctx->isc_nrxd_default[i];
4488 for (i = 0; i < sctx->isc_ntxqs; i++) {
4489 if (scctx->isc_ntxd[i] < sctx->isc_ntxd_min[i]) {
4490 device_printf(dev, "ntxd%d: %d less than ntxd_min %d - resetting to min\n",
4491 i, scctx->isc_ntxd[i], sctx->isc_ntxd_min[i]);
4492 scctx->isc_ntxd[i] = sctx->isc_ntxd_min[i];
4494 if (scctx->isc_ntxd[i] > sctx->isc_ntxd_max[i]) {
4495 device_printf(dev, "ntxd%d: %d greater than ntxd_max %d - resetting to max\n",
4496 i, scctx->isc_ntxd[i], sctx->isc_ntxd_max[i]);
4497 scctx->isc_ntxd[i] = sctx->isc_ntxd_max[i];
4499 if (!powerof2(scctx->isc_ntxd[i])) {
4500 device_printf(dev, "ntxd%d: %d is not a power of 2 - using default value of %d\n",
4501 i, scctx->isc_ntxd[i], sctx->isc_ntxd_default[i]);
4502 scctx->isc_ntxd[i] = sctx->isc_ntxd_default[i];
4508 iflib_add_pfil(if_ctx_t ctx)
4510 struct pfil_head *pfil;
4511 struct pfil_head_args pa;
4515 pa.pa_version = PFIL_VERSION;
4516 pa.pa_flags = PFIL_IN;
4517 pa.pa_type = PFIL_TYPE_ETHERNET;
4518 pa.pa_headname = ctx->ifc_ifp->if_xname;
4519 pfil = pfil_head_register(&pa);
4521 for (i = 0, rxq = ctx->ifc_rxqs; i < NRXQSETS(ctx); i++, rxq++) {
4527 iflib_rem_pfil(if_ctx_t ctx)
4529 struct pfil_head *pfil;
4533 rxq = ctx->ifc_rxqs;
4535 for (i = 0; i < NRXQSETS(ctx); i++, rxq++) {
4538 pfil_head_unregister(pfil);
4542 get_ctx_core_offset(if_ctx_t ctx)
4544 if_softc_ctx_t scctx = &ctx->ifc_softc_ctx;
4545 struct cpu_offset *op;
4547 uint16_t ret = ctx->ifc_sysctl_core_offset;
4549 if (ret != CORE_OFFSET_UNSPECIFIED)
4552 if (ctx->ifc_sysctl_separate_txrx)
4553 qc = scctx->isc_ntxqsets + scctx->isc_nrxqsets;
4555 qc = max(scctx->isc_ntxqsets, scctx->isc_nrxqsets);
4557 mtx_lock(&cpu_offset_mtx);
4558 SLIST_FOREACH(op, &cpu_offsets, entries) {
4559 if (CPU_CMP(&ctx->ifc_cpus, &op->set) == 0) {
4562 MPASS(op->refcount < UINT_MAX);
4567 if (ret == CORE_OFFSET_UNSPECIFIED) {
4569 op = malloc(sizeof(struct cpu_offset), M_IFLIB,
4572 device_printf(ctx->ifc_dev,
4573 "allocation for cpu offset failed.\n");
4577 CPU_COPY(&ctx->ifc_cpus, &op->set);
4578 SLIST_INSERT_HEAD(&cpu_offsets, op, entries);
4581 mtx_unlock(&cpu_offset_mtx);
4587 unref_ctx_core_offset(if_ctx_t ctx)
4589 struct cpu_offset *op, *top;
4591 mtx_lock(&cpu_offset_mtx);
4592 SLIST_FOREACH_SAFE(op, &cpu_offsets, entries, top) {
4593 if (CPU_CMP(&ctx->ifc_cpus, &op->set) == 0) {
4594 MPASS(op->refcount > 0);
4596 if (op->refcount == 0) {
4597 SLIST_REMOVE(&cpu_offsets, op, cpu_offset, entries);
4603 mtx_unlock(&cpu_offset_mtx);
4607 iflib_device_register(device_t dev, void *sc, if_shared_ctx_t sctx, if_ctx_t *ctxp)
4611 if_softc_ctx_t scctx;
4612 kobjop_desc_t kobj_desc;
4613 kobj_method_t *kobj_method;
4615 uint16_t main_rxq, main_txq;
4617 ctx = malloc(sizeof(* ctx), M_IFLIB, M_WAITOK|M_ZERO);
4620 sc = malloc(sctx->isc_driver->size, M_IFLIB, M_WAITOK|M_ZERO);
4621 device_set_softc(dev, ctx);
4622 ctx->ifc_flags |= IFC_SC_ALLOCATED;
4625 ctx->ifc_sctx = sctx;
4627 ctx->ifc_softc = sc;
4629 if ((err = iflib_register(ctx)) != 0) {
4630 device_printf(dev, "iflib_register failed %d\n", err);
4633 iflib_add_device_sysctl_pre(ctx);
4635 scctx = &ctx->ifc_softc_ctx;
4638 iflib_reset_qvalues(ctx);
4640 if ((err = IFDI_ATTACH_PRE(ctx)) != 0) {
4641 device_printf(dev, "IFDI_ATTACH_PRE failed %d\n", err);
4644 _iflib_pre_assert(scctx);
4645 ctx->ifc_txrx = *scctx->isc_txrx;
4647 if (sctx->isc_flags & IFLIB_DRIVER_MEDIA)
4648 ctx->ifc_mediap = scctx->isc_media;
4651 if (scctx->isc_capabilities & IFCAP_TXCSUM)
4652 MPASS(scctx->isc_tx_csum_flags);
4655 if_setcapabilities(ifp,
4656 scctx->isc_capabilities | IFCAP_HWSTATS | IFCAP_NOMAP);
4657 if_setcapenable(ifp,
4658 scctx->isc_capenable | IFCAP_HWSTATS | IFCAP_NOMAP);
4660 if (scctx->isc_ntxqsets == 0 || (scctx->isc_ntxqsets_max && scctx->isc_ntxqsets_max < scctx->isc_ntxqsets))
4661 scctx->isc_ntxqsets = scctx->isc_ntxqsets_max;
4662 if (scctx->isc_nrxqsets == 0 || (scctx->isc_nrxqsets_max && scctx->isc_nrxqsets_max < scctx->isc_nrxqsets))
4663 scctx->isc_nrxqsets = scctx->isc_nrxqsets_max;
4665 main_txq = (sctx->isc_flags & IFLIB_HAS_TXCQ) ? 1 : 0;
4666 main_rxq = (sctx->isc_flags & IFLIB_HAS_RXCQ) ? 1 : 0;
4668 /* XXX change for per-queue sizes */
4669 device_printf(dev, "Using %d TX descriptors and %d RX descriptors\n",
4670 scctx->isc_ntxd[main_txq], scctx->isc_nrxd[main_rxq]);
4672 if (scctx->isc_tx_nsegments > scctx->isc_ntxd[main_txq] /
4673 MAX_SINGLE_PACKET_FRACTION)
4674 scctx->isc_tx_nsegments = max(1, scctx->isc_ntxd[main_txq] /
4675 MAX_SINGLE_PACKET_FRACTION);
4676 if (scctx->isc_tx_tso_segments_max > scctx->isc_ntxd[main_txq] /
4677 MAX_SINGLE_PACKET_FRACTION)
4678 scctx->isc_tx_tso_segments_max = max(1,
4679 scctx->isc_ntxd[main_txq] / MAX_SINGLE_PACKET_FRACTION);
4681 /* TSO parameters - dig these out of the data sheet - simply correspond to tag setup */
4682 if (if_getcapabilities(ifp) & IFCAP_TSO) {
4684 * The stack can't handle a TSO size larger than IP_MAXPACKET,
4687 if_sethwtsomax(ifp, min(scctx->isc_tx_tso_size_max,
4690 * Take maximum number of m_pullup(9)'s in iflib_parse_header()
4691 * into account. In the worst case, each of these calls will
4692 * add another mbuf and, thus, the requirement for another DMA
4693 * segment. So for best performance, it doesn't make sense to
4694 * advertize a maximum of TSO segments that typically will
4695 * require defragmentation in iflib_encap().
4697 if_sethwtsomaxsegcount(ifp, scctx->isc_tx_tso_segments_max - 3);
4698 if_sethwtsomaxsegsize(ifp, scctx->isc_tx_tso_segsize_max);
4700 if (scctx->isc_rss_table_size == 0)
4701 scctx->isc_rss_table_size = 64;
4702 scctx->isc_rss_table_mask = scctx->isc_rss_table_size-1;
4704 GROUPTASK_INIT(&ctx->ifc_admin_task, 0, _task_fn_admin, ctx);
4705 /* XXX format name */
4706 taskqgroup_attach(qgroup_if_config_tqg, &ctx->ifc_admin_task, ctx,
4707 NULL, NULL, "admin");
4709 /* Set up cpu set. If it fails, use the set of all CPUs. */
4710 if (bus_get_cpus(dev, INTR_CPUS, sizeof(ctx->ifc_cpus), &ctx->ifc_cpus) != 0) {
4711 device_printf(dev, "Unable to fetch CPU list\n");
4712 CPU_COPY(&all_cpus, &ctx->ifc_cpus);
4714 MPASS(CPU_COUNT(&ctx->ifc_cpus) > 0);
4717 ** Now set up MSI or MSI-X, should return us the number of supported
4718 ** vectors (will be 1 for a legacy interrupt and MSI).
4720 if (sctx->isc_flags & IFLIB_SKIP_MSIX) {
4721 msix = scctx->isc_vectors;
4722 } else if (scctx->isc_msix_bar != 0)
4724 * The simple fact that isc_msix_bar is not 0 does not mean we
4725 * we have a good value there that is known to work.
4727 msix = iflib_msix_init(ctx);
4729 scctx->isc_vectors = 1;
4730 scctx->isc_ntxqsets = 1;
4731 scctx->isc_nrxqsets = 1;
4732 scctx->isc_intr = IFLIB_INTR_LEGACY;
4735 /* Get memory for the station queues */
4736 if ((err = iflib_queues_alloc(ctx))) {
4737 device_printf(dev, "Unable to allocate queue memory\n");
4738 goto fail_intr_free;
4741 if ((err = iflib_qset_structures_setup(ctx)))
4745 * Now that we know how many queues there are, get the core offset.
4747 ctx->ifc_sysctl_core_offset = get_ctx_core_offset(ctx);
4750 * Group taskqueues aren't properly set up until SMP is started,
4751 * so we disable interrupts until we can handle them post
4754 * XXX: disabling interrupts doesn't actually work, at least for
4755 * the non-MSI case. When they occur before SI_SUB_SMP completes,
4756 * we do null handling and depend on this not causing too large an
4759 IFDI_INTR_DISABLE(ctx);
4763 * When using MSI-X, ensure that ifdi_{r,t}x_queue_intr_enable
4764 * aren't the default NULL implementation.
4766 kobj_desc = &ifdi_rx_queue_intr_enable_desc;
4767 kobj_method = kobj_lookup_method(((kobj_t)ctx)->ops->cls, NULL,
4769 if (kobj_method == &kobj_desc->deflt) {
4771 "MSI-X requires ifdi_rx_queue_intr_enable method");
4775 kobj_desc = &ifdi_tx_queue_intr_enable_desc;
4776 kobj_method = kobj_lookup_method(((kobj_t)ctx)->ops->cls, NULL,
4778 if (kobj_method == &kobj_desc->deflt) {
4780 "MSI-X requires ifdi_tx_queue_intr_enable method");
4786 * Assign the MSI-X vectors.
4787 * Note that the default NULL ifdi_msix_intr_assign method will
4790 err = IFDI_MSIX_INTR_ASSIGN(ctx, msix);
4792 device_printf(dev, "IFDI_MSIX_INTR_ASSIGN failed %d\n",
4796 } else if (scctx->isc_intr != IFLIB_INTR_MSIX) {
4798 if (scctx->isc_intr == IFLIB_INTR_MSI) {
4802 if ((err = iflib_legacy_setup(ctx, ctx->isc_legacy_intr, ctx->ifc_softc, &rid, "irq0")) != 0) {
4803 device_printf(dev, "iflib_legacy_setup failed %d\n", err);
4808 "Cannot use iflib with only 1 MSI-X interrupt!\n");
4810 goto fail_intr_free;
4813 ether_ifattach(ctx->ifc_ifp, ctx->ifc_mac.octet);
4815 if ((err = IFDI_ATTACH_POST(ctx)) != 0) {
4816 device_printf(dev, "IFDI_ATTACH_POST failed %d\n", err);
4821 * Tell the upper layer(s) if IFCAP_VLAN_MTU is supported.
4822 * This must appear after the call to ether_ifattach() because
4823 * ether_ifattach() sets if_hdrlen to the default value.
4825 if (if_getcapabilities(ifp) & IFCAP_VLAN_MTU)
4826 if_setifheaderlen(ifp, sizeof(struct ether_vlan_header));
4828 if ((err = iflib_netmap_attach(ctx))) {
4829 device_printf(ctx->ifc_dev, "netmap attach failed: %d\n", err);
4834 DEBUGNET_SET(ctx->ifc_ifp, iflib);
4836 if_setgetcounterfn(ctx->ifc_ifp, iflib_if_get_counter);
4837 iflib_add_device_sysctl_post(ctx);
4838 iflib_add_pfil(ctx);
4839 ctx->ifc_flags |= IFC_INIT_DONE;
4845 ether_ifdetach(ctx->ifc_ifp);
4847 iflib_free_intr_mem(ctx);
4849 iflib_tx_structures_free(ctx);
4850 iflib_rx_structures_free(ctx);
4851 taskqgroup_detach(qgroup_if_config_tqg, &ctx->ifc_admin_task);
4855 iflib_deregister(ctx);
4857 device_set_softc(ctx->ifc_dev, NULL);
4858 if (ctx->ifc_flags & IFC_SC_ALLOCATED)
4859 free(ctx->ifc_softc, M_IFLIB);
4865 iflib_pseudo_register(device_t dev, if_shared_ctx_t sctx, if_ctx_t *ctxp,
4866 struct iflib_cloneattach_ctx *clctx)
4871 if_softc_ctx_t scctx;
4877 ctx = malloc(sizeof(*ctx), M_IFLIB, M_WAITOK|M_ZERO);
4878 sc = malloc(sctx->isc_driver->size, M_IFLIB, M_WAITOK|M_ZERO);
4879 ctx->ifc_flags |= IFC_SC_ALLOCATED;
4880 if (sctx->isc_flags & (IFLIB_PSEUDO|IFLIB_VIRTUAL))
4881 ctx->ifc_flags |= IFC_PSEUDO;
4883 ctx->ifc_sctx = sctx;
4884 ctx->ifc_softc = sc;
4887 if ((err = iflib_register(ctx)) != 0) {
4888 device_printf(dev, "%s: iflib_register failed %d\n", __func__, err);
4891 iflib_add_device_sysctl_pre(ctx);
4893 scctx = &ctx->ifc_softc_ctx;
4896 iflib_reset_qvalues(ctx);
4898 if ((err = IFDI_ATTACH_PRE(ctx)) != 0) {
4899 device_printf(dev, "IFDI_ATTACH_PRE failed %d\n", err);
4902 if (sctx->isc_flags & IFLIB_GEN_MAC)
4903 ether_gen_addr(ifp, &ctx->ifc_mac);
4904 if ((err = IFDI_CLONEATTACH(ctx, clctx->cc_ifc, clctx->cc_name,
4905 clctx->cc_params)) != 0) {
4906 device_printf(dev, "IFDI_CLONEATTACH failed %d\n", err);
4909 ifmedia_add(ctx->ifc_mediap, IFM_ETHER | IFM_1000_T | IFM_FDX, 0, NULL);
4910 ifmedia_add(ctx->ifc_mediap, IFM_ETHER | IFM_AUTO, 0, NULL);
4911 ifmedia_set(ctx->ifc_mediap, IFM_ETHER | IFM_AUTO);
4914 if (scctx->isc_capabilities & IFCAP_TXCSUM)
4915 MPASS(scctx->isc_tx_csum_flags);
4918 if_setcapabilities(ifp, scctx->isc_capabilities | IFCAP_HWSTATS | IFCAP_LINKSTATE);
4919 if_setcapenable(ifp, scctx->isc_capenable | IFCAP_HWSTATS | IFCAP_LINKSTATE);
4921 ifp->if_flags |= IFF_NOGROUP;
4922 if (sctx->isc_flags & IFLIB_PSEUDO) {
4923 ether_ifattach(ctx->ifc_ifp, ctx->ifc_mac.octet);
4925 if ((err = IFDI_ATTACH_POST(ctx)) != 0) {
4926 device_printf(dev, "IFDI_ATTACH_POST failed %d\n", err);
4932 * Tell the upper layer(s) if IFCAP_VLAN_MTU is supported.
4933 * This must appear after the call to ether_ifattach() because
4934 * ether_ifattach() sets if_hdrlen to the default value.
4936 if (if_getcapabilities(ifp) & IFCAP_VLAN_MTU)
4937 if_setifheaderlen(ifp,
4938 sizeof(struct ether_vlan_header));
4940 if_setgetcounterfn(ctx->ifc_ifp, iflib_if_get_counter);
4941 iflib_add_device_sysctl_post(ctx);
4942 ctx->ifc_flags |= IFC_INIT_DONE;
4945 _iflib_pre_assert(scctx);
4946 ctx->ifc_txrx = *scctx->isc_txrx;
4948 if (scctx->isc_ntxqsets == 0 || (scctx->isc_ntxqsets_max && scctx->isc_ntxqsets_max < scctx->isc_ntxqsets))
4949 scctx->isc_ntxqsets = scctx->isc_ntxqsets_max;
4950 if (scctx->isc_nrxqsets == 0 || (scctx->isc_nrxqsets_max && scctx->isc_nrxqsets_max < scctx->isc_nrxqsets))
4951 scctx->isc_nrxqsets = scctx->isc_nrxqsets_max;
4953 main_txq = (sctx->isc_flags & IFLIB_HAS_TXCQ) ? 1 : 0;
4954 main_rxq = (sctx->isc_flags & IFLIB_HAS_RXCQ) ? 1 : 0;
4956 /* XXX change for per-queue sizes */
4957 device_printf(dev, "Using %d TX descriptors and %d RX descriptors\n",
4958 scctx->isc_ntxd[main_txq], scctx->isc_nrxd[main_rxq]);
4960 if (scctx->isc_tx_nsegments > scctx->isc_ntxd[main_txq] /
4961 MAX_SINGLE_PACKET_FRACTION)
4962 scctx->isc_tx_nsegments = max(1, scctx->isc_ntxd[main_txq] /
4963 MAX_SINGLE_PACKET_FRACTION);
4964 if (scctx->isc_tx_tso_segments_max > scctx->isc_ntxd[main_txq] /
4965 MAX_SINGLE_PACKET_FRACTION)
4966 scctx->isc_tx_tso_segments_max = max(1,
4967 scctx->isc_ntxd[main_txq] / MAX_SINGLE_PACKET_FRACTION);
4969 /* TSO parameters - dig these out of the data sheet - simply correspond to tag setup */
4970 if (if_getcapabilities(ifp) & IFCAP_TSO) {
4972 * The stack can't handle a TSO size larger than IP_MAXPACKET,
4975 if_sethwtsomax(ifp, min(scctx->isc_tx_tso_size_max,
4978 * Take maximum number of m_pullup(9)'s in iflib_parse_header()
4979 * into account. In the worst case, each of these calls will
4980 * add another mbuf and, thus, the requirement for another DMA
4981 * segment. So for best performance, it doesn't make sense to
4982 * advertize a maximum of TSO segments that typically will
4983 * require defragmentation in iflib_encap().
4985 if_sethwtsomaxsegcount(ifp, scctx->isc_tx_tso_segments_max - 3);
4986 if_sethwtsomaxsegsize(ifp, scctx->isc_tx_tso_segsize_max);
4988 if (scctx->isc_rss_table_size == 0)
4989 scctx->isc_rss_table_size = 64;
4990 scctx->isc_rss_table_mask = scctx->isc_rss_table_size-1;
4992 GROUPTASK_INIT(&ctx->ifc_admin_task, 0, _task_fn_admin, ctx);
4993 /* XXX format name */
4994 taskqgroup_attach(qgroup_if_config_tqg, &ctx->ifc_admin_task, ctx,
4995 NULL, NULL, "admin");
4997 /* XXX --- can support > 1 -- but keep it simple for now */
4998 scctx->isc_intr = IFLIB_INTR_LEGACY;
5000 /* Get memory for the station queues */
5001 if ((err = iflib_queues_alloc(ctx))) {
5002 device_printf(dev, "Unable to allocate queue memory\n");
5003 goto fail_iflib_detach;
5006 if ((err = iflib_qset_structures_setup(ctx))) {
5007 device_printf(dev, "qset structure setup failed %d\n", err);
5012 * XXX What if anything do we want to do about interrupts?
5014 ether_ifattach(ctx->ifc_ifp, ctx->ifc_mac.octet);
5015 if ((err = IFDI_ATTACH_POST(ctx)) != 0) {
5016 device_printf(dev, "IFDI_ATTACH_POST failed %d\n", err);
5021 * Tell the upper layer(s) if IFCAP_VLAN_MTU is supported.
5022 * This must appear after the call to ether_ifattach() because
5023 * ether_ifattach() sets if_hdrlen to the default value.
5025 if (if_getcapabilities(ifp) & IFCAP_VLAN_MTU)
5026 if_setifheaderlen(ifp, sizeof(struct ether_vlan_header));
5028 /* XXX handle more than one queue */
5029 for (i = 0; i < scctx->isc_nrxqsets; i++)
5030 IFDI_RX_CLSET(ctx, 0, i, ctx->ifc_rxqs[i].ifr_fl[0].ifl_sds.ifsd_cl);
5034 if_setgetcounterfn(ctx->ifc_ifp, iflib_if_get_counter);
5035 iflib_add_device_sysctl_post(ctx);
5036 ctx->ifc_flags |= IFC_INIT_DONE;
5041 ether_ifdetach(ctx->ifc_ifp);
5043 iflib_tx_structures_free(ctx);
5044 iflib_rx_structures_free(ctx);
5049 iflib_deregister(ctx);
5051 free(ctx->ifc_softc, M_IFLIB);
5057 iflib_pseudo_deregister(if_ctx_t ctx)
5059 if_t ifp = ctx->ifc_ifp;
5063 struct taskqgroup *tqg;
5066 /* Unregister VLAN event handlers early */
5067 iflib_unregister_vlan_handlers(ctx);
5069 ether_ifdetach(ifp);
5070 /* XXX drain any dependent tasks */
5071 tqg = qgroup_if_io_tqg;
5072 for (txq = ctx->ifc_txqs, i = 0; i < NTXQSETS(ctx); i++, txq++) {
5073 callout_drain(&txq->ift_timer);
5074 if (txq->ift_task.gt_uniq != NULL)
5075 taskqgroup_detach(tqg, &txq->ift_task);
5077 for (i = 0, rxq = ctx->ifc_rxqs; i < NRXQSETS(ctx); i++, rxq++) {
5078 callout_drain(&rxq->ifr_watchdog);
5079 if (rxq->ifr_task.gt_uniq != NULL)
5080 taskqgroup_detach(tqg, &rxq->ifr_task);
5082 for (j = 0, fl = rxq->ifr_fl; j < rxq->ifr_nfl; j++, fl++)
5083 free(fl->ifl_rx_bitmap, M_IFLIB);
5085 tqg = qgroup_if_config_tqg;
5086 if (ctx->ifc_admin_task.gt_uniq != NULL)
5087 taskqgroup_detach(tqg, &ctx->ifc_admin_task);
5088 if (ctx->ifc_vflr_task.gt_uniq != NULL)
5089 taskqgroup_detach(tqg, &ctx->ifc_vflr_task);
5091 iflib_tx_structures_free(ctx);
5092 iflib_rx_structures_free(ctx);
5094 iflib_deregister(ctx);
5096 if (ctx->ifc_flags & IFC_SC_ALLOCATED)
5097 free(ctx->ifc_softc, M_IFLIB);
5103 iflib_device_attach(device_t dev)
5106 if_shared_ctx_t sctx;
5108 if ((sctx = DEVICE_REGISTER(dev)) == NULL || sctx->isc_magic != IFLIB_MAGIC)
5111 pci_enable_busmaster(dev);
5113 return (iflib_device_register(dev, NULL, sctx, &ctx));
5117 iflib_device_deregister(if_ctx_t ctx)
5119 if_t ifp = ctx->ifc_ifp;
5122 device_t dev = ctx->ifc_dev;
5124 struct taskqgroup *tqg;
5127 /* Make sure VLANS are not using driver */
5128 if (if_vlantrunkinuse(ifp)) {
5129 device_printf(dev, "Vlan in use, detach first\n");
5133 if (!CTX_IS_VF(ctx) && pci_iov_detach(dev) != 0) {
5134 device_printf(dev, "SR-IOV in use; detach first.\n");
5140 ctx->ifc_flags |= IFC_IN_DETACH;
5143 /* Unregister VLAN handlers before calling iflib_stop() */
5144 iflib_unregister_vlan_handlers(ctx);
5146 iflib_netmap_detach(ifp);
5147 ether_ifdetach(ifp);
5153 iflib_rem_pfil(ctx);
5154 if (ctx->ifc_led_dev != NULL)
5155 led_destroy(ctx->ifc_led_dev);
5156 /* XXX drain any dependent tasks */
5157 tqg = qgroup_if_io_tqg;
5158 for (txq = ctx->ifc_txqs, i = 0; i < NTXQSETS(ctx); i++, txq++) {
5159 callout_drain(&txq->ift_timer);
5160 if (txq->ift_task.gt_uniq != NULL)
5161 taskqgroup_detach(tqg, &txq->ift_task);
5163 for (i = 0, rxq = ctx->ifc_rxqs; i < NRXQSETS(ctx); i++, rxq++) {
5164 if (rxq->ifr_task.gt_uniq != NULL)
5165 taskqgroup_detach(tqg, &rxq->ifr_task);
5167 for (j = 0, fl = rxq->ifr_fl; j < rxq->ifr_nfl; j++, fl++)
5168 free(fl->ifl_rx_bitmap, M_IFLIB);
5170 tqg = qgroup_if_config_tqg;
5171 if (ctx->ifc_admin_task.gt_uniq != NULL)
5172 taskqgroup_detach(tqg, &ctx->ifc_admin_task);
5173 if (ctx->ifc_vflr_task.gt_uniq != NULL)
5174 taskqgroup_detach(tqg, &ctx->ifc_vflr_task);
5179 /* ether_ifdetach calls if_qflush - lock must be destroy afterwards*/
5180 iflib_free_intr_mem(ctx);
5182 bus_generic_detach(dev);
5184 iflib_tx_structures_free(ctx);
5185 iflib_rx_structures_free(ctx);
5187 iflib_deregister(ctx);
5189 device_set_softc(ctx->ifc_dev, NULL);
5190 if (ctx->ifc_flags & IFC_SC_ALLOCATED)
5191 free(ctx->ifc_softc, M_IFLIB);
5192 unref_ctx_core_offset(ctx);
5198 iflib_free_intr_mem(if_ctx_t ctx)
5201 if (ctx->ifc_softc_ctx.isc_intr != IFLIB_INTR_MSIX) {
5202 iflib_irq_free(ctx, &ctx->ifc_legacy_irq);
5204 if (ctx->ifc_softc_ctx.isc_intr != IFLIB_INTR_LEGACY) {
5205 pci_release_msi(ctx->ifc_dev);
5207 if (ctx->ifc_msix_mem != NULL) {
5208 bus_release_resource(ctx->ifc_dev, SYS_RES_MEMORY,
5209 rman_get_rid(ctx->ifc_msix_mem), ctx->ifc_msix_mem);
5210 ctx->ifc_msix_mem = NULL;
5215 iflib_device_detach(device_t dev)
5217 if_ctx_t ctx = device_get_softc(dev);
5219 return (iflib_device_deregister(ctx));
5223 iflib_device_suspend(device_t dev)
5225 if_ctx_t ctx = device_get_softc(dev);
5231 return bus_generic_suspend(dev);
5234 iflib_device_shutdown(device_t dev)
5236 if_ctx_t ctx = device_get_softc(dev);
5242 return bus_generic_suspend(dev);
5247 iflib_device_resume(device_t dev)
5249 if_ctx_t ctx = device_get_softc(dev);
5250 iflib_txq_t txq = ctx->ifc_txqs;
5254 iflib_if_init_locked(ctx);
5256 for (int i = 0; i < NTXQSETS(ctx); i++, txq++)
5257 iflib_txq_check_drain(txq, IFLIB_RESTART_BUDGET);
5259 return (bus_generic_resume(dev));
5263 iflib_device_iov_init(device_t dev, uint16_t num_vfs, const nvlist_t *params)
5266 if_ctx_t ctx = device_get_softc(dev);
5269 error = IFDI_IOV_INIT(ctx, num_vfs, params);
5276 iflib_device_iov_uninit(device_t dev)
5278 if_ctx_t ctx = device_get_softc(dev);
5281 IFDI_IOV_UNINIT(ctx);
5286 iflib_device_iov_add_vf(device_t dev, uint16_t vfnum, const nvlist_t *params)
5289 if_ctx_t ctx = device_get_softc(dev);
5292 error = IFDI_IOV_VF_ADD(ctx, vfnum, params);
5298 /*********************************************************************
5300 * MODULE FUNCTION DEFINITIONS
5302 **********************************************************************/
5305 * - Start a fast taskqueue thread for each core
5306 * - Start a taskqueue for control operations
5309 iflib_module_init(void)
5315 iflib_module_event_handler(module_t mod, int what, void *arg)
5321 if ((err = iflib_module_init()) != 0)
5327 return (EOPNOTSUPP);
5333 /*********************************************************************
5335 * PUBLIC FUNCTION DEFINITIONS
5336 * ordered as in iflib.h
5338 **********************************************************************/
5342 _iflib_assert(if_shared_ctx_t sctx)
5346 MPASS(sctx->isc_tx_maxsize);
5347 MPASS(sctx->isc_tx_maxsegsize);
5349 MPASS(sctx->isc_rx_maxsize);
5350 MPASS(sctx->isc_rx_nsegments);
5351 MPASS(sctx->isc_rx_maxsegsize);
5353 MPASS(sctx->isc_nrxqs >= 1 && sctx->isc_nrxqs <= 8);
5354 for (i = 0; i < sctx->isc_nrxqs; i++) {
5355 MPASS(sctx->isc_nrxd_min[i]);
5356 MPASS(powerof2(sctx->isc_nrxd_min[i]));
5357 MPASS(sctx->isc_nrxd_max[i]);
5358 MPASS(powerof2(sctx->isc_nrxd_max[i]));
5359 MPASS(sctx->isc_nrxd_default[i]);
5360 MPASS(powerof2(sctx->isc_nrxd_default[i]));
5363 MPASS(sctx->isc_ntxqs >= 1 && sctx->isc_ntxqs <= 8);
5364 for (i = 0; i < sctx->isc_ntxqs; i++) {
5365 MPASS(sctx->isc_ntxd_min[i]);
5366 MPASS(powerof2(sctx->isc_ntxd_min[i]));
5367 MPASS(sctx->isc_ntxd_max[i]);
5368 MPASS(powerof2(sctx->isc_ntxd_max[i]));
5369 MPASS(sctx->isc_ntxd_default[i]);
5370 MPASS(powerof2(sctx->isc_ntxd_default[i]));
5375 _iflib_pre_assert(if_softc_ctx_t scctx)
5378 MPASS(scctx->isc_txrx->ift_txd_encap);
5379 MPASS(scctx->isc_txrx->ift_txd_flush);
5380 MPASS(scctx->isc_txrx->ift_txd_credits_update);
5381 MPASS(scctx->isc_txrx->ift_rxd_available);
5382 MPASS(scctx->isc_txrx->ift_rxd_pkt_get);
5383 MPASS(scctx->isc_txrx->ift_rxd_refill);
5384 MPASS(scctx->isc_txrx->ift_rxd_flush);
5388 iflib_register(if_ctx_t ctx)
5390 if_shared_ctx_t sctx = ctx->ifc_sctx;
5391 driver_t *driver = sctx->isc_driver;
5392 device_t dev = ctx->ifc_dev;
5395 _iflib_assert(sctx);
5398 STATE_LOCK_INIT(ctx, device_get_nameunit(ctx->ifc_dev));
5399 ifp = ctx->ifc_ifp = if_alloc(IFT_ETHER);
5401 device_printf(dev, "can not allocate ifnet structure\n");
5406 * Initialize our context's device specific methods
5408 kobj_init((kobj_t) ctx, (kobj_class_t) driver);
5409 kobj_class_compile((kobj_class_t) driver);
5411 if_initname(ifp, device_get_name(dev), device_get_unit(dev));
5412 if_setsoftc(ifp, ctx);
5413 if_setdev(ifp, dev);
5414 if_setinitfn(ifp, iflib_if_init);
5415 if_setioctlfn(ifp, iflib_if_ioctl);
5417 if_setstartfn(ifp, iflib_altq_if_start);
5418 if_settransmitfn(ifp, iflib_altq_if_transmit);
5419 if_setsendqready(ifp);
5421 if_settransmitfn(ifp, iflib_if_transmit);
5423 if_setqflushfn(ifp, iflib_if_qflush);
5424 if_setflags(ifp, IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST |
5427 ctx->ifc_vlan_attach_event =
5428 EVENTHANDLER_REGISTER(vlan_config, iflib_vlan_register, ctx,
5429 EVENTHANDLER_PRI_FIRST);
5430 ctx->ifc_vlan_detach_event =
5431 EVENTHANDLER_REGISTER(vlan_unconfig, iflib_vlan_unregister, ctx,
5432 EVENTHANDLER_PRI_FIRST);
5434 if ((sctx->isc_flags & IFLIB_DRIVER_MEDIA) == 0) {
5435 ctx->ifc_mediap = &ctx->ifc_media;
5436 ifmedia_init(ctx->ifc_mediap, IFM_IMASK,
5437 iflib_media_change, iflib_media_status);
5443 iflib_unregister_vlan_handlers(if_ctx_t ctx)
5445 /* Unregister VLAN events */
5446 if (ctx->ifc_vlan_attach_event != NULL) {
5447 EVENTHANDLER_DEREGISTER(vlan_config, ctx->ifc_vlan_attach_event);
5448 ctx->ifc_vlan_attach_event = NULL;
5450 if (ctx->ifc_vlan_detach_event != NULL) {
5451 EVENTHANDLER_DEREGISTER(vlan_unconfig, ctx->ifc_vlan_detach_event);
5452 ctx->ifc_vlan_detach_event = NULL;
5458 iflib_deregister(if_ctx_t ctx)
5460 if_t ifp = ctx->ifc_ifp;
5462 /* Remove all media */
5463 ifmedia_removeall(&ctx->ifc_media);
5465 /* Ensure that VLAN event handlers are unregistered */
5466 iflib_unregister_vlan_handlers(ctx);
5468 /* Release kobject reference */
5469 kobj_delete((kobj_t) ctx, NULL);
5471 /* Free the ifnet structure */
5474 STATE_LOCK_DESTROY(ctx);
5476 /* ether_ifdetach calls if_qflush - lock must be destroy afterwards*/
5477 CTX_LOCK_DESTROY(ctx);
5481 iflib_queues_alloc(if_ctx_t ctx)
5483 if_shared_ctx_t sctx = ctx->ifc_sctx;
5484 if_softc_ctx_t scctx = &ctx->ifc_softc_ctx;
5485 device_t dev = ctx->ifc_dev;
5486 int nrxqsets = scctx->isc_nrxqsets;
5487 int ntxqsets = scctx->isc_ntxqsets;
5490 iflib_fl_t fl = NULL;
5491 int i, j, cpu, err, txconf, rxconf;
5492 iflib_dma_info_t ifdip;
5493 uint32_t *rxqsizes = scctx->isc_rxqsizes;
5494 uint32_t *txqsizes = scctx->isc_txqsizes;
5495 uint8_t nrxqs = sctx->isc_nrxqs;
5496 uint8_t ntxqs = sctx->isc_ntxqs;
5497 int nfree_lists = sctx->isc_nfl ? sctx->isc_nfl : 1;
5501 KASSERT(ntxqs > 0, ("number of queues per qset must be at least 1"));
5502 KASSERT(nrxqs > 0, ("number of queues per qset must be at least 1"));
5504 /* Allocate the TX ring struct memory */
5505 if (!(ctx->ifc_txqs =
5506 (iflib_txq_t) malloc(sizeof(struct iflib_txq) *
5507 ntxqsets, M_IFLIB, M_NOWAIT | M_ZERO))) {
5508 device_printf(dev, "Unable to allocate TX ring memory\n");
5513 /* Now allocate the RX */
5514 if (!(ctx->ifc_rxqs =
5515 (iflib_rxq_t) malloc(sizeof(struct iflib_rxq) *
5516 nrxqsets, M_IFLIB, M_NOWAIT | M_ZERO))) {
5517 device_printf(dev, "Unable to allocate RX ring memory\n");
5522 txq = ctx->ifc_txqs;
5523 rxq = ctx->ifc_rxqs;
5526 * XXX handle allocation failure
5528 for (txconf = i = 0, cpu = CPU_FIRST(); i < ntxqsets; i++, txconf++, txq++, cpu = CPU_NEXT(cpu)) {
5529 /* Set up some basics */
5531 if ((ifdip = malloc(sizeof(struct iflib_dma_info) * ntxqs,
5532 M_IFLIB, M_NOWAIT | M_ZERO)) == NULL) {
5534 "Unable to allocate TX DMA info memory\n");
5538 txq->ift_ifdi = ifdip;
5539 for (j = 0; j < ntxqs; j++, ifdip++) {
5540 if (iflib_dma_alloc(ctx, txqsizes[j], ifdip, 0)) {
5542 "Unable to allocate TX descriptors\n");
5546 txq->ift_txd_size[j] = scctx->isc_txd_size[j];
5547 bzero((void *)ifdip->idi_vaddr, txqsizes[j]);
5551 if (sctx->isc_flags & IFLIB_HAS_TXCQ) {
5552 txq->ift_br_offset = 1;
5554 txq->ift_br_offset = 0;
5557 txq->ift_timer.c_cpu = cpu;
5559 if (iflib_txsd_alloc(txq)) {
5560 device_printf(dev, "Critical Failure setting up TX buffers\n");
5565 /* Initialize the TX lock */
5566 snprintf(txq->ift_mtx_name, MTX_NAME_LEN, "%s:TX(%d):callout",
5567 device_get_nameunit(dev), txq->ift_id);
5568 mtx_init(&txq->ift_mtx, txq->ift_mtx_name, NULL, MTX_DEF);
5569 callout_init_mtx(&txq->ift_timer, &txq->ift_mtx, 0);
5571 err = ifmp_ring_alloc(&txq->ift_br, 2048, txq, iflib_txq_drain,
5572 iflib_txq_can_drain, M_IFLIB, M_WAITOK);
5574 /* XXX free any allocated rings */
5575 device_printf(dev, "Unable to allocate buf_ring\n");
5580 for (rxconf = i = 0; i < nrxqsets; i++, rxconf++, rxq++) {
5581 /* Set up some basics */
5582 callout_init(&rxq->ifr_watchdog, 1);
5584 if ((ifdip = malloc(sizeof(struct iflib_dma_info) * nrxqs,
5585 M_IFLIB, M_NOWAIT | M_ZERO)) == NULL) {
5587 "Unable to allocate RX DMA info memory\n");
5592 rxq->ifr_ifdi = ifdip;
5593 /* XXX this needs to be changed if #rx queues != #tx queues */
5594 rxq->ifr_ntxqirq = 1;
5595 rxq->ifr_txqid[0] = i;
5596 for (j = 0; j < nrxqs; j++, ifdip++) {
5597 if (iflib_dma_alloc(ctx, rxqsizes[j], ifdip, 0)) {
5599 "Unable to allocate RX descriptors\n");
5603 bzero((void *)ifdip->idi_vaddr, rxqsizes[j]);
5607 if (sctx->isc_flags & IFLIB_HAS_RXCQ) {
5608 rxq->ifr_fl_offset = 1;
5610 rxq->ifr_fl_offset = 0;
5612 rxq->ifr_nfl = nfree_lists;
5614 (iflib_fl_t) malloc(sizeof(struct iflib_fl) * nfree_lists, M_IFLIB, M_NOWAIT | M_ZERO))) {
5615 device_printf(dev, "Unable to allocate free list memory\n");
5620 for (j = 0; j < nfree_lists; j++) {
5621 fl[j].ifl_rxq = rxq;
5623 fl[j].ifl_ifdi = &rxq->ifr_ifdi[j + rxq->ifr_fl_offset];
5624 fl[j].ifl_rxd_size = scctx->isc_rxd_size[j];
5626 /* Allocate receive buffers for the ring */
5627 if (iflib_rxsd_alloc(rxq)) {
5629 "Critical Failure setting up receive buffers\n");
5634 for (j = 0, fl = rxq->ifr_fl; j < rxq->ifr_nfl; j++, fl++)
5635 fl->ifl_rx_bitmap = bit_alloc(fl->ifl_size, M_IFLIB,
5640 vaddrs = malloc(sizeof(caddr_t)*ntxqsets*ntxqs, M_IFLIB, M_WAITOK);
5641 paddrs = malloc(sizeof(uint64_t)*ntxqsets*ntxqs, M_IFLIB, M_WAITOK);
5642 for (i = 0; i < ntxqsets; i++) {
5643 iflib_dma_info_t di = ctx->ifc_txqs[i].ift_ifdi;
5645 for (j = 0; j < ntxqs; j++, di++) {
5646 vaddrs[i*ntxqs + j] = di->idi_vaddr;
5647 paddrs[i*ntxqs + j] = di->idi_paddr;
5650 if ((err = IFDI_TX_QUEUES_ALLOC(ctx, vaddrs, paddrs, ntxqs, ntxqsets)) != 0) {
5651 device_printf(ctx->ifc_dev,
5652 "Unable to allocate device TX queue\n");
5653 iflib_tx_structures_free(ctx);
5654 free(vaddrs, M_IFLIB);
5655 free(paddrs, M_IFLIB);
5658 free(vaddrs, M_IFLIB);
5659 free(paddrs, M_IFLIB);
5662 vaddrs = malloc(sizeof(caddr_t)*nrxqsets*nrxqs, M_IFLIB, M_WAITOK);
5663 paddrs = malloc(sizeof(uint64_t)*nrxqsets*nrxqs, M_IFLIB, M_WAITOK);
5664 for (i = 0; i < nrxqsets; i++) {
5665 iflib_dma_info_t di = ctx->ifc_rxqs[i].ifr_ifdi;
5667 for (j = 0; j < nrxqs; j++, di++) {
5668 vaddrs[i*nrxqs + j] = di->idi_vaddr;
5669 paddrs[i*nrxqs + j] = di->idi_paddr;
5672 if ((err = IFDI_RX_QUEUES_ALLOC(ctx, vaddrs, paddrs, nrxqs, nrxqsets)) != 0) {
5673 device_printf(ctx->ifc_dev,
5674 "Unable to allocate device RX queue\n");
5675 iflib_tx_structures_free(ctx);
5676 free(vaddrs, M_IFLIB);
5677 free(paddrs, M_IFLIB);
5680 free(vaddrs, M_IFLIB);
5681 free(paddrs, M_IFLIB);
5685 /* XXX handle allocation failure changes */
5689 if (ctx->ifc_rxqs != NULL)
5690 free(ctx->ifc_rxqs, M_IFLIB);
5691 ctx->ifc_rxqs = NULL;
5692 if (ctx->ifc_txqs != NULL)
5693 free(ctx->ifc_txqs, M_IFLIB);
5694 ctx->ifc_txqs = NULL;
5700 iflib_tx_structures_setup(if_ctx_t ctx)
5702 iflib_txq_t txq = ctx->ifc_txqs;
5705 for (i = 0; i < NTXQSETS(ctx); i++, txq++)
5706 iflib_txq_setup(txq);
5712 iflib_tx_structures_free(if_ctx_t ctx)
5714 iflib_txq_t txq = ctx->ifc_txqs;
5715 if_shared_ctx_t sctx = ctx->ifc_sctx;
5718 for (i = 0; i < NTXQSETS(ctx); i++, txq++) {
5719 for (j = 0; j < sctx->isc_ntxqs; j++)
5720 iflib_dma_free(&txq->ift_ifdi[j]);
5721 iflib_txq_destroy(txq);
5723 free(ctx->ifc_txqs, M_IFLIB);
5724 ctx->ifc_txqs = NULL;
5725 IFDI_QUEUES_FREE(ctx);
5728 /*********************************************************************
5730 * Initialize all receive rings.
5732 **********************************************************************/
5734 iflib_rx_structures_setup(if_ctx_t ctx)
5736 iflib_rxq_t rxq = ctx->ifc_rxqs;
5738 #if defined(INET6) || defined(INET)
5742 for (q = 0; q < ctx->ifc_softc_ctx.isc_nrxqsets; q++, rxq++) {
5743 #if defined(INET6) || defined(INET)
5744 if (if_getcapabilities(ctx->ifc_ifp) & IFCAP_LRO) {
5745 err = tcp_lro_init_args(&rxq->ifr_lc, ctx->ifc_ifp,
5746 TCP_LRO_ENTRIES, min(1024,
5747 ctx->ifc_softc_ctx.isc_nrxd[rxq->ifr_fl_offset]));
5749 device_printf(ctx->ifc_dev,
5750 "LRO Initialization failed!\n");
5755 IFDI_RXQ_SETUP(ctx, rxq->ifr_id);
5758 #if defined(INET6) || defined(INET)
5761 * Free LRO resources allocated so far, we will only handle
5762 * the rings that completed, the failing case will have
5763 * cleaned up for itself. 'q' failed, so its the terminus.
5765 rxq = ctx->ifc_rxqs;
5766 for (i = 0; i < q; ++i, rxq++) {
5767 if (if_getcapabilities(ctx->ifc_ifp) & IFCAP_LRO)
5768 tcp_lro_free(&rxq->ifr_lc);
5774 /*********************************************************************
5776 * Free all receive rings.
5778 **********************************************************************/
5780 iflib_rx_structures_free(if_ctx_t ctx)
5782 iflib_rxq_t rxq = ctx->ifc_rxqs;
5783 if_shared_ctx_t sctx = ctx->ifc_sctx;
5786 for (i = 0; i < ctx->ifc_softc_ctx.isc_nrxqsets; i++, rxq++) {
5787 for (j = 0; j < sctx->isc_nrxqs; j++)
5788 iflib_dma_free(&rxq->ifr_ifdi[j]);
5789 iflib_rx_sds_free(rxq);
5790 #if defined(INET6) || defined(INET)
5791 if (if_getcapabilities(ctx->ifc_ifp) & IFCAP_LRO)
5792 tcp_lro_free(&rxq->ifr_lc);
5795 free(ctx->ifc_rxqs, M_IFLIB);
5796 ctx->ifc_rxqs = NULL;
5800 iflib_qset_structures_setup(if_ctx_t ctx)
5805 * It is expected that the caller takes care of freeing queues if this
5808 if ((err = iflib_tx_structures_setup(ctx)) != 0) {
5809 device_printf(ctx->ifc_dev, "iflib_tx_structures_setup failed: %d\n", err);
5813 if ((err = iflib_rx_structures_setup(ctx)) != 0)
5814 device_printf(ctx->ifc_dev, "iflib_rx_structures_setup failed: %d\n", err);
5820 iflib_irq_alloc(if_ctx_t ctx, if_irq_t irq, int rid,
5821 driver_filter_t filter, void *filter_arg, driver_intr_t handler, void *arg, const char *name)
5824 return (_iflib_irq_alloc(ctx, irq, rid, filter, handler, arg, name));
5829 find_nth(if_ctx_t ctx, int qid)
5832 int i, cpuid, eqid, count;
5834 CPU_COPY(&ctx->ifc_cpus, &cpus);
5835 count = CPU_COUNT(&cpus);
5837 /* clear up to the qid'th bit */
5838 for (i = 0; i < eqid; i++) {
5839 cpuid = CPU_FFS(&cpus);
5841 CPU_CLR(cpuid-1, &cpus);
5843 cpuid = CPU_FFS(&cpus);
5849 extern struct cpu_group *cpu_top; /* CPU topology */
5852 find_child_with_core(int cpu, struct cpu_group *grp)
5856 if (grp->cg_children == 0)
5859 MPASS(grp->cg_child);
5860 for (i = 0; i < grp->cg_children; i++) {
5861 if (CPU_ISSET(cpu, &grp->cg_child[i].cg_mask))
5869 * Find the nth "close" core to the specified core
5870 * "close" is defined as the deepest level that shares
5871 * at least an L2 cache. With threads, this will be
5872 * threads on the same core. If the shared cache is L3
5873 * or higher, simply returns the same core.
5876 find_close_core(int cpu, int core_offset)
5878 struct cpu_group *grp;
5887 while ((i = find_child_with_core(cpu, grp)) != -1) {
5888 /* If the child only has one cpu, don't descend */
5889 if (grp->cg_child[i].cg_count <= 1)
5891 grp = &grp->cg_child[i];
5894 /* If they don't share at least an L2 cache, use the same CPU */
5895 if (grp->cg_level > CG_SHARE_L2 || grp->cg_level == CG_SHARE_NONE)
5899 CPU_COPY(&grp->cg_mask, &cs);
5901 /* Add the selected CPU offset to core offset. */
5902 for (i = 0; (fcpu = CPU_FFS(&cs)) != 0; i++) {
5903 if (fcpu - 1 == cpu)
5905 CPU_CLR(fcpu - 1, &cs);
5911 CPU_COPY(&grp->cg_mask, &cs);
5912 for (i = core_offset % grp->cg_count; i > 0; i--) {
5913 MPASS(CPU_FFS(&cs));
5914 CPU_CLR(CPU_FFS(&cs) - 1, &cs);
5916 MPASS(CPU_FFS(&cs));
5917 return CPU_FFS(&cs) - 1;
5921 find_close_core(int cpu, int core_offset __unused)
5928 get_core_offset(if_ctx_t ctx, iflib_intr_type_t type, int qid)
5932 /* TX queues get cores which share at least an L2 cache with the corresponding RX queue */
5933 /* XXX handle multiple RX threads per core and more than two core per L2 group */
5934 return qid / CPU_COUNT(&ctx->ifc_cpus) + 1;
5936 case IFLIB_INTR_RXTX:
5937 /* RX queues get the specified core */
5938 return qid / CPU_COUNT(&ctx->ifc_cpus);
5944 #define get_core_offset(ctx, type, qid) CPU_FIRST()
5945 #define find_close_core(cpuid, tid) CPU_FIRST()
5946 #define find_nth(ctx, gid) CPU_FIRST()
5949 /* Just to avoid copy/paste */
5951 iflib_irq_set_affinity(if_ctx_t ctx, if_irq_t irq, iflib_intr_type_t type,
5952 int qid, struct grouptask *gtask, struct taskqgroup *tqg, void *uniq,
5956 int co, cpuid, err, tid;
5959 co = ctx->ifc_sysctl_core_offset;
5960 if (ctx->ifc_sysctl_separate_txrx && type == IFLIB_INTR_TX)
5961 co += ctx->ifc_softc_ctx.isc_nrxqsets;
5962 cpuid = find_nth(ctx, qid + co);
5963 tid = get_core_offset(ctx, type, qid);
5965 device_printf(dev, "get_core_offset failed\n");
5966 return (EOPNOTSUPP);
5968 cpuid = find_close_core(cpuid, tid);
5969 err = taskqgroup_attach_cpu(tqg, gtask, uniq, cpuid, dev, irq->ii_res,
5972 device_printf(dev, "taskqgroup_attach_cpu failed %d\n", err);
5976 if (cpuid > ctx->ifc_cpuid_highest)
5977 ctx->ifc_cpuid_highest = cpuid;
5983 iflib_irq_alloc_generic(if_ctx_t ctx, if_irq_t irq, int rid,
5984 iflib_intr_type_t type, driver_filter_t *filter,
5985 void *filter_arg, int qid, const char *name)
5988 struct grouptask *gtask;
5989 struct taskqgroup *tqg;
5990 iflib_filter_info_t info;
5993 driver_filter_t *intr_fast;
5996 info = &ctx->ifc_filter_info;
6000 /* XXX merge tx/rx for netmap? */
6002 q = &ctx->ifc_txqs[qid];
6003 info = &ctx->ifc_txqs[qid].ift_filter_info;
6004 gtask = &ctx->ifc_txqs[qid].ift_task;
6005 tqg = qgroup_if_io_tqg;
6007 intr_fast = iflib_fast_intr;
6008 GROUPTASK_INIT(gtask, 0, fn, q);
6009 ctx->ifc_flags |= IFC_NETMAP_TX_IRQ;
6012 q = &ctx->ifc_rxqs[qid];
6013 info = &ctx->ifc_rxqs[qid].ifr_filter_info;
6014 gtask = &ctx->ifc_rxqs[qid].ifr_task;
6015 tqg = qgroup_if_io_tqg;
6017 intr_fast = iflib_fast_intr;
6018 NET_GROUPTASK_INIT(gtask, 0, fn, q);
6020 case IFLIB_INTR_RXTX:
6021 q = &ctx->ifc_rxqs[qid];
6022 info = &ctx->ifc_rxqs[qid].ifr_filter_info;
6023 gtask = &ctx->ifc_rxqs[qid].ifr_task;
6024 tqg = qgroup_if_io_tqg;
6026 intr_fast = iflib_fast_intr_rxtx;
6027 NET_GROUPTASK_INIT(gtask, 0, fn, q);
6029 case IFLIB_INTR_ADMIN:
6032 info = &ctx->ifc_filter_info;
6033 gtask = &ctx->ifc_admin_task;
6034 tqg = qgroup_if_config_tqg;
6035 fn = _task_fn_admin;
6036 intr_fast = iflib_fast_intr_ctx;
6039 device_printf(ctx->ifc_dev, "%s: unknown net intr type\n",
6044 info->ifi_filter = filter;
6045 info->ifi_filter_arg = filter_arg;
6046 info->ifi_task = gtask;
6050 err = _iflib_irq_alloc(ctx, irq, rid, intr_fast, NULL, info, name);
6052 device_printf(dev, "_iflib_irq_alloc failed %d\n", err);
6055 if (type == IFLIB_INTR_ADMIN)
6059 err = iflib_irq_set_affinity(ctx, irq, type, qid, gtask, tqg,
6064 taskqgroup_attach(tqg, gtask, q, dev, irq->ii_res, name);
6071 iflib_softirq_alloc_generic(if_ctx_t ctx, if_irq_t irq, iflib_intr_type_t type, void *arg, int qid, const char *name)
6073 struct grouptask *gtask;
6074 struct taskqgroup *tqg;
6081 q = &ctx->ifc_txqs[qid];
6082 gtask = &ctx->ifc_txqs[qid].ift_task;
6083 tqg = qgroup_if_io_tqg;
6085 GROUPTASK_INIT(gtask, 0, fn, q);
6088 q = &ctx->ifc_rxqs[qid];
6089 gtask = &ctx->ifc_rxqs[qid].ifr_task;
6090 tqg = qgroup_if_io_tqg;
6092 NET_GROUPTASK_INIT(gtask, 0, fn, q);
6094 case IFLIB_INTR_IOV:
6096 gtask = &ctx->ifc_vflr_task;
6097 tqg = qgroup_if_config_tqg;
6099 GROUPTASK_INIT(gtask, 0, fn, q);
6102 panic("unknown net intr type");
6105 err = iflib_irq_set_affinity(ctx, irq, type, qid, gtask, tqg,
6108 taskqgroup_attach(tqg, gtask, q, ctx->ifc_dev,
6111 taskqgroup_attach(tqg, gtask, q, NULL, NULL, name);
6116 iflib_irq_free(if_ctx_t ctx, if_irq_t irq)
6120 bus_teardown_intr(ctx->ifc_dev, irq->ii_res, irq->ii_tag);
6123 bus_release_resource(ctx->ifc_dev, SYS_RES_IRQ,
6124 rman_get_rid(irq->ii_res), irq->ii_res);
6128 iflib_legacy_setup(if_ctx_t ctx, driver_filter_t filter, void *filter_arg, int *rid, const char *name)
6130 iflib_txq_t txq = ctx->ifc_txqs;
6131 iflib_rxq_t rxq = ctx->ifc_rxqs;
6132 if_irq_t irq = &ctx->ifc_legacy_irq;
6133 iflib_filter_info_t info;
6135 struct grouptask *gtask;
6136 struct resource *res;
6137 struct taskqgroup *tqg;
6142 q = &ctx->ifc_rxqs[0];
6143 info = &rxq[0].ifr_filter_info;
6144 gtask = &rxq[0].ifr_task;
6145 tqg = qgroup_if_io_tqg;
6147 rx_only = (ctx->ifc_sctx->isc_flags & IFLIB_SINGLE_IRQ_RX_ONLY) != 0;
6149 ctx->ifc_flags |= IFC_LEGACY;
6150 info->ifi_filter = filter;
6151 info->ifi_filter_arg = filter_arg;
6152 info->ifi_task = gtask;
6153 info->ifi_ctx = rx_only ? ctx : q;
6156 /* We allocate a single interrupt resource */
6157 err = _iflib_irq_alloc(ctx, irq, tqrid, rx_only ? iflib_fast_intr_ctx :
6158 iflib_fast_intr_rxtx, NULL, info, name);
6161 NET_GROUPTASK_INIT(gtask, 0, _task_fn_rx, q);
6163 taskqgroup_attach(tqg, gtask, q, dev, res, name);
6165 GROUPTASK_INIT(&txq->ift_task, 0, _task_fn_tx, txq);
6166 taskqgroup_attach(qgroup_if_io_tqg, &txq->ift_task, txq, dev, res,
6172 iflib_led_create(if_ctx_t ctx)
6175 ctx->ifc_led_dev = led_create(iflib_led_func, ctx,
6176 device_get_nameunit(ctx->ifc_dev));
6180 iflib_tx_intr_deferred(if_ctx_t ctx, int txqid)
6183 GROUPTASK_ENQUEUE(&ctx->ifc_txqs[txqid].ift_task);
6187 iflib_rx_intr_deferred(if_ctx_t ctx, int rxqid)
6190 GROUPTASK_ENQUEUE(&ctx->ifc_rxqs[rxqid].ifr_task);
6194 iflib_admin_intr_deferred(if_ctx_t ctx)
6197 struct grouptask *gtask;
6199 gtask = &ctx->ifc_admin_task;
6200 MPASS(gtask != NULL && gtask->gt_taskqueue != NULL);
6203 GROUPTASK_ENQUEUE(&ctx->ifc_admin_task);
6207 iflib_iov_intr_deferred(if_ctx_t ctx)
6210 GROUPTASK_ENQUEUE(&ctx->ifc_vflr_task);
6214 iflib_io_tqg_attach(struct grouptask *gt, void *uniq, int cpu, const char *name)
6217 taskqgroup_attach_cpu(qgroup_if_io_tqg, gt, uniq, cpu, NULL, NULL,
6222 iflib_config_gtask_init(void *ctx, struct grouptask *gtask, gtask_fn_t *fn,
6226 GROUPTASK_INIT(gtask, 0, fn, ctx);
6227 taskqgroup_attach(qgroup_if_config_tqg, gtask, gtask, NULL, NULL,
6232 iflib_config_gtask_deinit(struct grouptask *gtask)
6235 taskqgroup_detach(qgroup_if_config_tqg, gtask);
6239 iflib_link_state_change(if_ctx_t ctx, int link_state, uint64_t baudrate)
6241 if_t ifp = ctx->ifc_ifp;
6242 iflib_txq_t txq = ctx->ifc_txqs;
6244 if_setbaudrate(ifp, baudrate);
6245 if (baudrate >= IF_Gbps(10)) {
6247 ctx->ifc_flags |= IFC_PREFETCH;
6250 /* If link down, disable watchdog */
6251 if ((ctx->ifc_link_state == LINK_STATE_UP) && (link_state == LINK_STATE_DOWN)) {
6252 for (int i = 0; i < ctx->ifc_softc_ctx.isc_ntxqsets; i++, txq++)
6253 txq->ift_qstatus = IFLIB_QUEUE_IDLE;
6255 ctx->ifc_link_state = link_state;
6256 if_link_state_change(ifp, link_state);
6260 iflib_tx_credits_update(if_ctx_t ctx, iflib_txq_t txq)
6264 int credits_pre = txq->ift_cidx_processed;
6267 bus_dmamap_sync(txq->ift_ifdi->idi_tag, txq->ift_ifdi->idi_map,
6268 BUS_DMASYNC_POSTREAD);
6269 if ((credits = ctx->isc_txd_credits_update(ctx->ifc_softc, txq->ift_id, true)) == 0)
6272 txq->ift_processed += credits;
6273 txq->ift_cidx_processed += credits;
6275 MPASS(credits_pre + credits == txq->ift_cidx_processed);
6276 if (txq->ift_cidx_processed >= txq->ift_size)
6277 txq->ift_cidx_processed -= txq->ift_size;
6282 iflib_rxd_avail(if_ctx_t ctx, iflib_rxq_t rxq, qidx_t cidx, qidx_t budget)
6287 for (i = 0, fl = &rxq->ifr_fl[0]; i < rxq->ifr_nfl; i++, fl++)
6288 bus_dmamap_sync(fl->ifl_ifdi->idi_tag, fl->ifl_ifdi->idi_map,
6289 BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE);
6290 return (ctx->isc_rxd_available(ctx->ifc_softc, rxq->ifr_id, cidx,
6295 iflib_add_int_delay_sysctl(if_ctx_t ctx, const char *name,
6296 const char *description, if_int_delay_info_t info,
6297 int offset, int value)
6299 info->iidi_ctx = ctx;
6300 info->iidi_offset = offset;
6301 info->iidi_value = value;
6302 SYSCTL_ADD_PROC(device_get_sysctl_ctx(ctx->ifc_dev),
6303 SYSCTL_CHILDREN(device_get_sysctl_tree(ctx->ifc_dev)),
6304 OID_AUTO, name, CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE,
6305 info, 0, iflib_sysctl_int_delay, "I", description);
6309 iflib_ctx_lock_get(if_ctx_t ctx)
6312 return (&ctx->ifc_ctx_sx);
6316 iflib_msix_init(if_ctx_t ctx)
6318 device_t dev = ctx->ifc_dev;
6319 if_shared_ctx_t sctx = ctx->ifc_sctx;
6320 if_softc_ctx_t scctx = &ctx->ifc_softc_ctx;
6321 int admincnt, bar, err, iflib_num_rx_queues, iflib_num_tx_queues;
6322 int msgs, queuemsgs, queues, rx_queues, tx_queues, vectors;
6324 iflib_num_tx_queues = ctx->ifc_sysctl_ntxqs;
6325 iflib_num_rx_queues = ctx->ifc_sysctl_nrxqs;
6328 device_printf(dev, "msix_init qsets capped at %d\n",
6329 imax(scctx->isc_ntxqsets, scctx->isc_nrxqsets));
6331 /* Override by tuneable */
6332 if (scctx->isc_disable_msix)
6335 /* First try MSI-X */
6336 if ((msgs = pci_msix_count(dev)) == 0) {
6338 device_printf(dev, "MSI-X not supported or disabled\n");
6342 bar = ctx->ifc_softc_ctx.isc_msix_bar;
6344 * bar == -1 => "trust me I know what I'm doing"
6345 * Some drivers are for hardware that is so shoddily
6346 * documented that no one knows which bars are which
6347 * so the developer has to map all bars. This hack
6348 * allows shoddy garbage to use MSI-X in this framework.
6351 ctx->ifc_msix_mem = bus_alloc_resource_any(dev,
6352 SYS_RES_MEMORY, &bar, RF_ACTIVE);
6353 if (ctx->ifc_msix_mem == NULL) {
6354 device_printf(dev, "Unable to map MSI-X table\n");
6359 admincnt = sctx->isc_admin_intrcnt;
6361 /* use only 1 qset in debug mode */
6362 queuemsgs = min(msgs - admincnt, 1);
6364 queuemsgs = msgs - admincnt;
6367 queues = imin(queuemsgs, rss_getnumbuckets());
6371 queues = imin(CPU_COUNT(&ctx->ifc_cpus), queues);
6374 "intr CPUs: %d queue msgs: %d admincnt: %d\n",
6375 CPU_COUNT(&ctx->ifc_cpus), queuemsgs, admincnt);
6377 /* If we're doing RSS, clamp at the number of RSS buckets */
6378 if (queues > rss_getnumbuckets())
6379 queues = rss_getnumbuckets();
6381 if (iflib_num_rx_queues > 0 && iflib_num_rx_queues < queuemsgs - admincnt)
6382 rx_queues = iflib_num_rx_queues;
6386 if (rx_queues > scctx->isc_nrxqsets)
6387 rx_queues = scctx->isc_nrxqsets;
6390 * We want this to be all logical CPUs by default
6392 if (iflib_num_tx_queues > 0 && iflib_num_tx_queues < queues)
6393 tx_queues = iflib_num_tx_queues;
6395 tx_queues = mp_ncpus;
6397 if (tx_queues > scctx->isc_ntxqsets)
6398 tx_queues = scctx->isc_ntxqsets;
6400 if (ctx->ifc_sysctl_qs_eq_override == 0) {
6402 if (tx_queues != rx_queues)
6404 "queue equality override not set, capping rx_queues at %d and tx_queues at %d\n",
6405 min(rx_queues, tx_queues), min(rx_queues, tx_queues));
6407 tx_queues = min(rx_queues, tx_queues);
6408 rx_queues = min(rx_queues, tx_queues);
6411 vectors = rx_queues + admincnt;
6412 if (msgs < vectors) {
6414 "insufficient number of MSI-X vectors "
6415 "(supported %d, need %d)\n", msgs, vectors);
6419 device_printf(dev, "Using %d RX queues %d TX queues\n", rx_queues,
6422 if ((err = pci_alloc_msix(dev, &vectors)) == 0) {
6423 if (vectors != msgs) {
6425 "Unable to allocate sufficient MSI-X vectors "
6426 "(got %d, need %d)\n", vectors, msgs);
6427 pci_release_msi(dev);
6429 bus_release_resource(dev, SYS_RES_MEMORY, bar,
6431 ctx->ifc_msix_mem = NULL;
6435 device_printf(dev, "Using MSI-X interrupts with %d vectors\n",
6437 scctx->isc_vectors = vectors;
6438 scctx->isc_nrxqsets = rx_queues;
6439 scctx->isc_ntxqsets = tx_queues;
6440 scctx->isc_intr = IFLIB_INTR_MSIX;
6445 "failed to allocate %d MSI-X vectors, err: %d\n", vectors,
6448 bus_release_resource(dev, SYS_RES_MEMORY, bar,
6450 ctx->ifc_msix_mem = NULL;
6455 vectors = pci_msi_count(dev);
6456 scctx->isc_nrxqsets = 1;
6457 scctx->isc_ntxqsets = 1;
6458 scctx->isc_vectors = vectors;
6459 if (vectors == 1 && pci_alloc_msi(dev, &vectors) == 0) {
6460 device_printf(dev,"Using an MSI interrupt\n");
6461 scctx->isc_intr = IFLIB_INTR_MSI;
6463 scctx->isc_vectors = 1;
6464 device_printf(dev,"Using a Legacy interrupt\n");
6465 scctx->isc_intr = IFLIB_INTR_LEGACY;
6471 static const char *ring_states[] = { "IDLE", "BUSY", "STALLED", "ABDICATED" };
6474 mp_ring_state_handler(SYSCTL_HANDLER_ARGS)
6477 uint16_t *state = ((uint16_t *)oidp->oid_arg1);
6479 const char *ring_state = "UNKNOWN";
6482 rc = sysctl_wire_old_buffer(req, 0);
6486 sb = sbuf_new_for_sysctl(NULL, NULL, 80, req);
6491 ring_state = ring_states[state[3]];
6493 sbuf_printf(sb, "pidx_head: %04hd pidx_tail: %04hd cidx: %04hd state: %s",
6494 state[0], state[1], state[2], ring_state);
6495 rc = sbuf_finish(sb);
6500 enum iflib_ndesc_handler {
6506 mp_ndesc_handler(SYSCTL_HANDLER_ARGS)
6508 if_ctx_t ctx = (void *)arg1;
6509 enum iflib_ndesc_handler type = arg2;
6510 char buf[256] = {0};
6517 case IFLIB_NTXD_HANDLER:
6518 ndesc = ctx->ifc_sysctl_ntxds;
6520 nqs = ctx->ifc_sctx->isc_ntxqs;
6522 case IFLIB_NRXD_HANDLER:
6523 ndesc = ctx->ifc_sysctl_nrxds;
6525 nqs = ctx->ifc_sctx->isc_nrxqs;
6528 printf("%s: unhandled type\n", __func__);
6534 for (i=0; i<8; i++) {
6539 sprintf(strchr(buf, 0), "%d", ndesc[i]);
6542 rc = sysctl_handle_string(oidp, buf, sizeof(buf), req);
6543 if (rc || req->newptr == NULL)
6546 for (i = 0, next = buf, p = strsep(&next, " ,"); i < 8 && p;
6547 i++, p = strsep(&next, " ,")) {
6548 ndesc[i] = strtoul(p, NULL, 10);
6554 #define NAME_BUFLEN 32
6556 iflib_add_device_sysctl_pre(if_ctx_t ctx)
6558 device_t dev = iflib_get_dev(ctx);
6559 struct sysctl_oid_list *child, *oid_list;
6560 struct sysctl_ctx_list *ctx_list;
6561 struct sysctl_oid *node;
6563 ctx_list = device_get_sysctl_ctx(dev);
6564 child = SYSCTL_CHILDREN(device_get_sysctl_tree(dev));
6565 ctx->ifc_sysctl_node = node = SYSCTL_ADD_NODE(ctx_list, child, OID_AUTO, "iflib",
6566 CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, "IFLIB fields");
6567 oid_list = SYSCTL_CHILDREN(node);
6569 SYSCTL_ADD_CONST_STRING(ctx_list, oid_list, OID_AUTO, "driver_version",
6570 CTLFLAG_RD, ctx->ifc_sctx->isc_driver_version,
6573 SYSCTL_ADD_U16(ctx_list, oid_list, OID_AUTO, "override_ntxqs",
6574 CTLFLAG_RWTUN, &ctx->ifc_sysctl_ntxqs, 0,
6575 "# of txqs to use, 0 => use default #");
6576 SYSCTL_ADD_U16(ctx_list, oid_list, OID_AUTO, "override_nrxqs",
6577 CTLFLAG_RWTUN, &ctx->ifc_sysctl_nrxqs, 0,
6578 "# of rxqs to use, 0 => use default #");
6579 SYSCTL_ADD_U16(ctx_list, oid_list, OID_AUTO, "override_qs_enable",
6580 CTLFLAG_RWTUN, &ctx->ifc_sysctl_qs_eq_override, 0,
6581 "permit #txq != #rxq");
6582 SYSCTL_ADD_INT(ctx_list, oid_list, OID_AUTO, "disable_msix",
6583 CTLFLAG_RWTUN, &ctx->ifc_softc_ctx.isc_disable_msix, 0,
6584 "disable MSI-X (default 0)");
6585 SYSCTL_ADD_U16(ctx_list, oid_list, OID_AUTO, "rx_budget",
6586 CTLFLAG_RWTUN, &ctx->ifc_sysctl_rx_budget, 0,
6587 "set the RX budget");
6588 SYSCTL_ADD_U16(ctx_list, oid_list, OID_AUTO, "tx_abdicate",
6589 CTLFLAG_RWTUN, &ctx->ifc_sysctl_tx_abdicate, 0,
6590 "cause TX to abdicate instead of running to completion");
6591 ctx->ifc_sysctl_core_offset = CORE_OFFSET_UNSPECIFIED;
6592 SYSCTL_ADD_U16(ctx_list, oid_list, OID_AUTO, "core_offset",
6593 CTLFLAG_RDTUN, &ctx->ifc_sysctl_core_offset, 0,
6594 "offset to start using cores at");
6595 SYSCTL_ADD_U8(ctx_list, oid_list, OID_AUTO, "separate_txrx",
6596 CTLFLAG_RDTUN, &ctx->ifc_sysctl_separate_txrx, 0,
6597 "use separate cores for TX and RX");
6599 /* XXX change for per-queue sizes */
6600 SYSCTL_ADD_PROC(ctx_list, oid_list, OID_AUTO, "override_ntxds",
6601 CTLTYPE_STRING | CTLFLAG_RWTUN | CTLFLAG_NEEDGIANT, ctx,
6602 IFLIB_NTXD_HANDLER, mp_ndesc_handler, "A",
6603 "list of # of TX descriptors to use, 0 = use default #");
6604 SYSCTL_ADD_PROC(ctx_list, oid_list, OID_AUTO, "override_nrxds",
6605 CTLTYPE_STRING | CTLFLAG_RWTUN | CTLFLAG_NEEDGIANT, ctx,
6606 IFLIB_NRXD_HANDLER, mp_ndesc_handler, "A",
6607 "list of # of RX descriptors to use, 0 = use default #");
6611 iflib_add_device_sysctl_post(if_ctx_t ctx)
6613 if_shared_ctx_t sctx = ctx->ifc_sctx;
6614 if_softc_ctx_t scctx = &ctx->ifc_softc_ctx;
6615 device_t dev = iflib_get_dev(ctx);
6616 struct sysctl_oid_list *child;
6617 struct sysctl_ctx_list *ctx_list;
6622 char namebuf[NAME_BUFLEN];
6624 struct sysctl_oid *queue_node, *fl_node, *node;
6625 struct sysctl_oid_list *queue_list, *fl_list;
6626 ctx_list = device_get_sysctl_ctx(dev);
6628 node = ctx->ifc_sysctl_node;
6629 child = SYSCTL_CHILDREN(node);
6631 if (scctx->isc_ntxqsets > 100)
6633 else if (scctx->isc_ntxqsets > 10)
6637 for (i = 0, txq = ctx->ifc_txqs; i < scctx->isc_ntxqsets; i++, txq++) {
6638 snprintf(namebuf, NAME_BUFLEN, qfmt, i);
6639 queue_node = SYSCTL_ADD_NODE(ctx_list, child, OID_AUTO, namebuf,
6640 CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, "Queue Name");
6641 queue_list = SYSCTL_CHILDREN(queue_node);
6643 SYSCTL_ADD_QUAD(ctx_list, queue_list, OID_AUTO, "txq_dequeued",
6645 &txq->ift_dequeued, "total mbufs freed");
6646 SYSCTL_ADD_QUAD(ctx_list, queue_list, OID_AUTO, "txq_enqueued",
6648 &txq->ift_enqueued, "total mbufs enqueued");
6650 SYSCTL_ADD_QUAD(ctx_list, queue_list, OID_AUTO, "mbuf_defrag",
6652 &txq->ift_mbuf_defrag, "# of times m_defrag was called");
6653 SYSCTL_ADD_QUAD(ctx_list, queue_list, OID_AUTO, "m_pullups",
6655 &txq->ift_pullups, "# of times m_pullup was called");
6656 SYSCTL_ADD_QUAD(ctx_list, queue_list, OID_AUTO, "mbuf_defrag_failed",
6658 &txq->ift_mbuf_defrag_failed, "# of times m_defrag failed");
6659 SYSCTL_ADD_QUAD(ctx_list, queue_list, OID_AUTO, "no_desc_avail",
6661 &txq->ift_no_desc_avail, "# of times no descriptors were available");
6662 SYSCTL_ADD_QUAD(ctx_list, queue_list, OID_AUTO, "tx_map_failed",
6664 &txq->ift_map_failed, "# of times DMA map failed");
6665 SYSCTL_ADD_QUAD(ctx_list, queue_list, OID_AUTO, "txd_encap_efbig",
6667 &txq->ift_txd_encap_efbig, "# of times txd_encap returned EFBIG");
6668 SYSCTL_ADD_QUAD(ctx_list, queue_list, OID_AUTO, "no_tx_dma_setup",
6670 &txq->ift_no_tx_dma_setup, "# of times map failed for other than EFBIG");
6671 SYSCTL_ADD_U16(ctx_list, queue_list, OID_AUTO, "txq_pidx",
6673 &txq->ift_pidx, 1, "Producer Index");
6674 SYSCTL_ADD_U16(ctx_list, queue_list, OID_AUTO, "txq_cidx",
6676 &txq->ift_cidx, 1, "Consumer Index");
6677 SYSCTL_ADD_U16(ctx_list, queue_list, OID_AUTO, "txq_cidx_processed",
6679 &txq->ift_cidx_processed, 1, "Consumer Index seen by credit update");
6680 SYSCTL_ADD_U16(ctx_list, queue_list, OID_AUTO, "txq_in_use",
6682 &txq->ift_in_use, 1, "descriptors in use");
6683 SYSCTL_ADD_QUAD(ctx_list, queue_list, OID_AUTO, "txq_processed",
6685 &txq->ift_processed, "descriptors procesed for clean");
6686 SYSCTL_ADD_QUAD(ctx_list, queue_list, OID_AUTO, "txq_cleaned",
6688 &txq->ift_cleaned, "total cleaned");
6689 SYSCTL_ADD_PROC(ctx_list, queue_list, OID_AUTO, "ring_state",
6690 CTLTYPE_STRING | CTLFLAG_RD | CTLFLAG_NEEDGIANT,
6691 __DEVOLATILE(uint64_t *, &txq->ift_br->state), 0,
6692 mp_ring_state_handler, "A", "soft ring state");
6693 SYSCTL_ADD_COUNTER_U64(ctx_list, queue_list, OID_AUTO, "r_enqueues",
6694 CTLFLAG_RD, &txq->ift_br->enqueues,
6695 "# of enqueues to the mp_ring for this queue");
6696 SYSCTL_ADD_COUNTER_U64(ctx_list, queue_list, OID_AUTO, "r_drops",
6697 CTLFLAG_RD, &txq->ift_br->drops,
6698 "# of drops in the mp_ring for this queue");
6699 SYSCTL_ADD_COUNTER_U64(ctx_list, queue_list, OID_AUTO, "r_starts",
6700 CTLFLAG_RD, &txq->ift_br->starts,
6701 "# of normal consumer starts in the mp_ring for this queue");
6702 SYSCTL_ADD_COUNTER_U64(ctx_list, queue_list, OID_AUTO, "r_stalls",
6703 CTLFLAG_RD, &txq->ift_br->stalls,
6704 "# of consumer stalls in the mp_ring for this queue");
6705 SYSCTL_ADD_COUNTER_U64(ctx_list, queue_list, OID_AUTO, "r_restarts",
6706 CTLFLAG_RD, &txq->ift_br->restarts,
6707 "# of consumer restarts in the mp_ring for this queue");
6708 SYSCTL_ADD_COUNTER_U64(ctx_list, queue_list, OID_AUTO, "r_abdications",
6709 CTLFLAG_RD, &txq->ift_br->abdications,
6710 "# of consumer abdications in the mp_ring for this queue");
6713 if (scctx->isc_nrxqsets > 100)
6715 else if (scctx->isc_nrxqsets > 10)
6719 for (i = 0, rxq = ctx->ifc_rxqs; i < scctx->isc_nrxqsets; i++, rxq++) {
6720 snprintf(namebuf, NAME_BUFLEN, qfmt, i);
6721 queue_node = SYSCTL_ADD_NODE(ctx_list, child, OID_AUTO, namebuf,
6722 CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, "Queue Name");
6723 queue_list = SYSCTL_CHILDREN(queue_node);
6724 if (sctx->isc_flags & IFLIB_HAS_RXCQ) {
6725 SYSCTL_ADD_U16(ctx_list, queue_list, OID_AUTO, "rxq_cq_cidx",
6727 &rxq->ifr_cq_cidx, 1, "Consumer Index");
6730 for (j = 0, fl = rxq->ifr_fl; j < rxq->ifr_nfl; j++, fl++) {
6731 snprintf(namebuf, NAME_BUFLEN, "rxq_fl%d", j);
6732 fl_node = SYSCTL_ADD_NODE(ctx_list, queue_list, OID_AUTO, namebuf,
6733 CTLFLAG_RD | CTLFLAG_MPSAFE, NULL, "freelist Name");
6734 fl_list = SYSCTL_CHILDREN(fl_node);
6735 SYSCTL_ADD_U16(ctx_list, fl_list, OID_AUTO, "pidx",
6737 &fl->ifl_pidx, 1, "Producer Index");
6738 SYSCTL_ADD_U16(ctx_list, fl_list, OID_AUTO, "cidx",
6740 &fl->ifl_cidx, 1, "Consumer Index");
6741 SYSCTL_ADD_U16(ctx_list, fl_list, OID_AUTO, "credits",
6743 &fl->ifl_credits, 1, "credits available");
6744 SYSCTL_ADD_U16(ctx_list, fl_list, OID_AUTO, "buf_size",
6746 &fl->ifl_buf_size, 1, "buffer size");
6748 SYSCTL_ADD_QUAD(ctx_list, fl_list, OID_AUTO, "fl_m_enqueued",
6750 &fl->ifl_m_enqueued, "mbufs allocated");
6751 SYSCTL_ADD_QUAD(ctx_list, fl_list, OID_AUTO, "fl_m_dequeued",
6753 &fl->ifl_m_dequeued, "mbufs freed");
6754 SYSCTL_ADD_QUAD(ctx_list, fl_list, OID_AUTO, "fl_cl_enqueued",
6756 &fl->ifl_cl_enqueued, "clusters allocated");
6757 SYSCTL_ADD_QUAD(ctx_list, fl_list, OID_AUTO, "fl_cl_dequeued",
6759 &fl->ifl_cl_dequeued, "clusters freed");
6768 iflib_request_reset(if_ctx_t ctx)
6772 ctx->ifc_flags |= IFC_DO_RESET;
6776 #ifndef __NO_STRICT_ALIGNMENT
6777 static struct mbuf *
6778 iflib_fixup_rx(struct mbuf *m)
6782 if (m->m_len <= (MCLBYTES - ETHER_HDR_LEN)) {
6783 bcopy(m->m_data, m->m_data + ETHER_HDR_LEN, m->m_len);
6784 m->m_data += ETHER_HDR_LEN;
6787 MGETHDR(n, M_NOWAIT, MT_DATA);
6792 bcopy(m->m_data, n->m_data, ETHER_HDR_LEN);
6793 m->m_data += ETHER_HDR_LEN;
6794 m->m_len -= ETHER_HDR_LEN;
6795 n->m_len = ETHER_HDR_LEN;
6796 M_MOVE_PKTHDR(n, m);
6805 iflib_debugnet_init(if_t ifp, int *nrxr, int *ncl, int *clsize)
6809 ctx = if_getsoftc(ifp);
6811 *nrxr = NRXQSETS(ctx);
6812 *ncl = ctx->ifc_rxqs[0].ifr_fl->ifl_size;
6813 *clsize = ctx->ifc_rxqs[0].ifr_fl->ifl_buf_size;
6818 iflib_debugnet_event(if_t ifp, enum debugnet_ev event)
6821 if_softc_ctx_t scctx;
6826 ctx = if_getsoftc(ifp);
6827 scctx = &ctx->ifc_softc_ctx;
6830 case DEBUGNET_START:
6831 for (i = 0; i < scctx->isc_nrxqsets; i++) {
6832 rxq = &ctx->ifc_rxqs[i];
6833 for (j = 0; j < rxq->ifr_nfl; j++) {
6835 fl->ifl_zone = m_getzone(fl->ifl_buf_size);
6838 iflib_no_tx_batch = 1;
6846 iflib_debugnet_transmit(if_t ifp, struct mbuf *m)
6852 ctx = if_getsoftc(ifp);
6853 if ((if_getdrvflags(ifp) & (IFF_DRV_RUNNING | IFF_DRV_OACTIVE)) !=
6857 txq = &ctx->ifc_txqs[0];
6858 error = iflib_encap(txq, &m);
6860 (void)iflib_txd_db_check(ctx, txq, true, txq->ift_in_use);
6865 iflib_debugnet_poll(if_t ifp, int count)
6867 struct epoch_tracker et;
6869 if_softc_ctx_t scctx;
6873 ctx = if_getsoftc(ifp);
6874 scctx = &ctx->ifc_softc_ctx;
6876 if ((if_getdrvflags(ifp) & (IFF_DRV_RUNNING | IFF_DRV_OACTIVE)) !=
6880 txq = &ctx->ifc_txqs[0];
6881 (void)iflib_completed_tx_reclaim(txq, RECLAIM_THRESH(ctx));
6883 NET_EPOCH_ENTER(et);
6884 for (i = 0; i < scctx->isc_nrxqsets; i++)
6885 (void)iflib_rxeof(&ctx->ifc_rxqs[i], 16 /* XXX */);
6889 #endif /* DEBUGNET */