iflib.c revision 332288
1/*- 2 * Copyright (c) 2014-2016, Matthew Macy <mmacy@nextbsd.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright notice, 9 * this list of conditions and the following disclaimer. 10 * 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. 14 * 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. 26 */ 27 28#include <sys/cdefs.h> 29__FBSDID("$FreeBSD: stable/11/sys/net/iflib.c 332288 2018-04-08 16:54:07Z brooks $"); 30 31#include "opt_inet.h" 32#include "opt_inet6.h" 33#include "opt_acpi.h" 34 35#include <sys/param.h> 36#include <sys/types.h> 37#include <sys/bus.h> 38#include <sys/eventhandler.h> 39#include <sys/sockio.h> 40#include <sys/kernel.h> 41#include <sys/lock.h> 42#include <sys/mutex.h> 43#include <sys/module.h> 44#include <sys/kobj.h> 45#include <sys/rman.h> 46#include <sys/sbuf.h> 47#include <sys/smp.h> 48#include <sys/socket.h> 49#include <sys/sysctl.h> 50#include <sys/syslog.h> 51#include <sys/taskqueue.h> 52#include <sys/limits.h> 53 54 55#include <net/if.h> 56#include <net/if_var.h> 57#include <net/if_types.h> 58#include <net/if_media.h> 59#include <net/bpf.h> 60#include <net/ethernet.h> 61#include <net/mp_ring.h> 62 63#include <netinet/in.h> 64#include <netinet/in_pcb.h> 65#include <netinet/tcp_lro.h> 66#include <netinet/in_systm.h> 67#include <netinet/if_ether.h> 68#include <netinet/ip.h> 69#include <netinet/ip6.h> 70#include <netinet/tcp.h> 71 72#include <machine/bus.h> 73#include <machine/in_cksum.h> 74 75#include <vm/vm.h> 76#include <vm/pmap.h> 77 78#include <dev/led/led.h> 79#include <dev/pci/pcireg.h> 80#include <dev/pci/pcivar.h> 81#include <dev/pci/pci_private.h> 82 83#include <net/iflib.h> 84 85#include "ifdi_if.h" 86 87#if defined(__i386__) || defined(__amd64__) 88#include <sys/memdesc.h> 89#include <machine/bus.h> 90#include <machine/md_var.h> 91#include <machine/specialreg.h> 92#include <x86/include/busdma_impl.h> 93#include <x86/iommu/busdma_dmar.h> 94#endif 95 96 97/* 98 * enable accounting of every mbuf as it comes in to and goes out of iflib's software descriptor references 99 */ 100#define MEMORY_LOGGING 0 101/* 102 * Enable mbuf vectors for compressing long mbuf chains 103 */ 104 105/* 106 * NB: 107 * - Prefetching in tx cleaning should perhaps be a tunable. The distance ahead 108 * we prefetch needs to be determined by the time spent in m_free vis a vis 109 * the cost of a prefetch. This will of course vary based on the workload: 110 * - NFLX's m_free path is dominated by vm-based M_EXT manipulation which 111 * is quite expensive, thus suggesting very little prefetch. 112 * - small packet forwarding which is just returning a single mbuf to 113 * UMA will typically be very fast vis a vis the cost of a memory 114 * access. 115 */ 116 117 118/* 119 * File organization: 120 * - private structures 121 * - iflib private utility functions 122 * - ifnet functions 123 * - vlan registry and other exported functions 124 * - iflib public core functions 125 * 126 * 127 */ 128static MALLOC_DEFINE(M_IFLIB, "iflib", "ifnet library"); 129 130struct iflib_txq; 131typedef struct iflib_txq *iflib_txq_t; 132struct iflib_rxq; 133typedef struct iflib_rxq *iflib_rxq_t; 134struct iflib_fl; 135typedef struct iflib_fl *iflib_fl_t; 136 137typedef struct iflib_filter_info { 138 driver_filter_t *ifi_filter; 139 void *ifi_filter_arg; 140 struct grouptask *ifi_task; 141} *iflib_filter_info_t; 142 143struct iflib_ctx { 144 KOBJ_FIELDS; 145 /* 146 * Pointer to hardware driver's softc 147 */ 148 void *ifc_softc; 149 device_t ifc_dev; 150 if_t ifc_ifp; 151 152 cpuset_t ifc_cpus; 153 if_shared_ctx_t ifc_sctx; 154 struct if_softc_ctx ifc_softc_ctx; 155 156 struct mtx ifc_mtx; 157 158 uint16_t ifc_nhwtxqs; 159 uint16_t ifc_nhwrxqs; 160 161 iflib_txq_t ifc_txqs; 162 iflib_rxq_t ifc_rxqs; 163 uint32_t ifc_if_flags; 164 uint32_t ifc_flags; 165 uint32_t ifc_max_fl_buf_size; 166 int ifc_in_detach; 167 168 int ifc_link_state; 169 int ifc_link_irq; 170 int ifc_pause_frames; 171 int ifc_watchdog_events; 172 struct cdev *ifc_led_dev; 173 struct resource *ifc_msix_mem; 174 175 struct if_irq ifc_legacy_irq; 176 struct grouptask ifc_admin_task; 177 struct grouptask ifc_vflr_task; 178 struct iflib_filter_info ifc_filter_info; 179 struct ifmedia ifc_media; 180 181 struct sysctl_oid *ifc_sysctl_node; 182 uint16_t ifc_sysctl_ntxqs; 183 uint16_t ifc_sysctl_nrxqs; 184 uint16_t ifc_sysctl_qs_eq_override; 185 186 uint16_t ifc_sysctl_ntxds[8]; 187 uint16_t ifc_sysctl_nrxds[8]; 188 struct if_txrx ifc_txrx; 189#define isc_txd_encap ifc_txrx.ift_txd_encap 190#define isc_txd_flush ifc_txrx.ift_txd_flush 191#define isc_txd_credits_update ifc_txrx.ift_txd_credits_update 192#define isc_rxd_available ifc_txrx.ift_rxd_available 193#define isc_rxd_pkt_get ifc_txrx.ift_rxd_pkt_get 194#define isc_rxd_refill ifc_txrx.ift_rxd_refill 195#define isc_rxd_flush ifc_txrx.ift_rxd_flush 196#define isc_rxd_refill ifc_txrx.ift_rxd_refill 197#define isc_rxd_refill ifc_txrx.ift_rxd_refill 198#define isc_legacy_intr ifc_txrx.ift_legacy_intr 199 eventhandler_tag ifc_vlan_attach_event; 200 eventhandler_tag ifc_vlan_detach_event; 201 uint8_t ifc_mac[ETHER_ADDR_LEN]; 202 char ifc_mtx_name[16]; 203}; 204 205 206void * 207iflib_get_softc(if_ctx_t ctx) 208{ 209 210 return (ctx->ifc_softc); 211} 212 213device_t 214iflib_get_dev(if_ctx_t ctx) 215{ 216 217 return (ctx->ifc_dev); 218} 219 220if_t 221iflib_get_ifp(if_ctx_t ctx) 222{ 223 224 return (ctx->ifc_ifp); 225} 226 227struct ifmedia * 228iflib_get_media(if_ctx_t ctx) 229{ 230 231 return (&ctx->ifc_media); 232} 233 234void 235iflib_set_mac(if_ctx_t ctx, uint8_t mac[ETHER_ADDR_LEN]) 236{ 237 238 bcopy(mac, ctx->ifc_mac, ETHER_ADDR_LEN); 239} 240 241if_softc_ctx_t 242iflib_get_softc_ctx(if_ctx_t ctx) 243{ 244 245 return (&ctx->ifc_softc_ctx); 246} 247 248if_shared_ctx_t 249iflib_get_sctx(if_ctx_t ctx) 250{ 251 252 return (ctx->ifc_sctx); 253} 254 255#define CACHE_PTR_INCREMENT (CACHE_LINE_SIZE/sizeof(void*)) 256 257#define LINK_ACTIVE(ctx) ((ctx)->ifc_link_state == LINK_STATE_UP) 258#define CTX_IS_VF(ctx) ((ctx)->ifc_sctx->isc_flags & IFLIB_IS_VF) 259 260#define RX_SW_DESC_MAP_CREATED (1 << 0) 261#define TX_SW_DESC_MAP_CREATED (1 << 1) 262#define RX_SW_DESC_INUSE (1 << 3) 263#define TX_SW_DESC_MAPPED (1 << 4) 264 265typedef struct iflib_sw_rx_desc { 266 bus_dmamap_t ifsd_map; /* bus_dma map for packet */ 267 struct mbuf *ifsd_m; /* rx: uninitialized mbuf */ 268 caddr_t ifsd_cl; /* direct cluster pointer for rx */ 269 uint16_t ifsd_flags; 270} *iflib_rxsd_t; 271 272typedef struct iflib_sw_tx_desc_val { 273 bus_dmamap_t ifsd_map; /* bus_dma map for packet */ 274 struct mbuf *ifsd_m; /* pkthdr mbuf */ 275 uint8_t ifsd_flags; 276} *iflib_txsd_val_t; 277 278typedef struct iflib_sw_tx_desc_array { 279 bus_dmamap_t *ifsd_map; /* bus_dma maps for packet */ 280 struct mbuf **ifsd_m; /* pkthdr mbufs */ 281 uint8_t *ifsd_flags; 282} iflib_txsd_array_t; 283 284 285/* magic number that should be high enough for any hardware */ 286#define IFLIB_MAX_TX_SEGS 128 287#define IFLIB_MAX_RX_SEGS 32 288#define IFLIB_RX_COPY_THRESH 128 289#define IFLIB_MAX_RX_REFRESH 32 290#define IFLIB_QUEUE_IDLE 0 291#define IFLIB_QUEUE_HUNG 1 292#define IFLIB_QUEUE_WORKING 2 293 294/* this should really scale with ring size - 32 is a fairly arbitrary value for this */ 295#define TX_BATCH_SIZE 16 296 297#define IFLIB_RESTART_BUDGET 8 298 299#define IFC_LEGACY 0x01 300#define IFC_QFLUSH 0x02 301#define IFC_MULTISEG 0x04 302#define IFC_DMAR 0x08 303#define IFC_SC_ALLOCATED 0x10 304 305#define CSUM_OFFLOAD (CSUM_IP_TSO|CSUM_IP6_TSO|CSUM_IP| \ 306 CSUM_IP_UDP|CSUM_IP_TCP|CSUM_IP_SCTP| \ 307 CSUM_IP6_UDP|CSUM_IP6_TCP|CSUM_IP6_SCTP) 308struct iflib_txq { 309 uint16_t ift_in_use; 310 uint16_t ift_cidx; 311 uint16_t ift_cidx_processed; 312 uint16_t ift_pidx; 313 uint8_t ift_gen; 314 uint8_t ift_db_pending; 315 uint8_t ift_db_pending_queued; 316 uint8_t ift_npending; 317 uint8_t ift_br_offset; 318 /* implicit pad */ 319 uint64_t ift_processed; 320 uint64_t ift_cleaned; 321#if MEMORY_LOGGING 322 uint64_t ift_enqueued; 323 uint64_t ift_dequeued; 324#endif 325 uint64_t ift_no_tx_dma_setup; 326 uint64_t ift_no_desc_avail; 327 uint64_t ift_mbuf_defrag_failed; 328 uint64_t ift_mbuf_defrag; 329 uint64_t ift_map_failed; 330 uint64_t ift_txd_encap_efbig; 331 uint64_t ift_pullups; 332 333 struct mtx ift_mtx; 334 struct mtx ift_db_mtx; 335 336 /* constant values */ 337 if_ctx_t ift_ctx; 338 struct ifmp_ring **ift_br; 339 struct grouptask ift_task; 340 uint16_t ift_size; 341 uint16_t ift_id; 342 struct callout ift_timer; 343 struct callout ift_db_check; 344 345 iflib_txsd_array_t ift_sds; 346 uint8_t ift_nbr; 347 uint8_t ift_qstatus; 348 uint8_t ift_active; 349 uint8_t ift_closed; 350 int ift_watchdog_time; 351 struct iflib_filter_info ift_filter_info; 352 bus_dma_tag_t ift_desc_tag; 353 bus_dma_tag_t ift_tso_desc_tag; 354 iflib_dma_info_t ift_ifdi; 355#define MTX_NAME_LEN 16 356 char ift_mtx_name[MTX_NAME_LEN]; 357 char ift_db_mtx_name[MTX_NAME_LEN]; 358 bus_dma_segment_t ift_segs[IFLIB_MAX_TX_SEGS] __aligned(CACHE_LINE_SIZE); 359} __aligned(CACHE_LINE_SIZE); 360 361struct iflib_fl { 362 uint16_t ifl_cidx; 363 uint16_t ifl_pidx; 364 uint16_t ifl_credits; 365 uint8_t ifl_gen; 366#if MEMORY_LOGGING 367 uint64_t ifl_m_enqueued; 368 uint64_t ifl_m_dequeued; 369 uint64_t ifl_cl_enqueued; 370 uint64_t ifl_cl_dequeued; 371#endif 372 /* implicit pad */ 373 374 /* constant */ 375 uint16_t ifl_size; 376 uint16_t ifl_buf_size; 377 uint16_t ifl_cltype; 378 uma_zone_t ifl_zone; 379 iflib_rxsd_t ifl_sds; 380 iflib_rxq_t ifl_rxq; 381 uint8_t ifl_id; 382 bus_dma_tag_t ifl_desc_tag; 383 iflib_dma_info_t ifl_ifdi; 384 uint64_t ifl_bus_addrs[IFLIB_MAX_RX_REFRESH] __aligned(CACHE_LINE_SIZE); 385 caddr_t ifl_vm_addrs[IFLIB_MAX_RX_REFRESH]; 386} __aligned(CACHE_LINE_SIZE); 387 388static inline int 389get_inuse(int size, int cidx, int pidx, int gen) 390{ 391 int used; 392 393 if (pidx > cidx) 394 used = pidx - cidx; 395 else if (pidx < cidx) 396 used = size - cidx + pidx; 397 else if (gen == 0 && pidx == cidx) 398 used = 0; 399 else if (gen == 1 && pidx == cidx) 400 used = size; 401 else 402 panic("bad state"); 403 404 return (used); 405} 406 407#define TXQ_AVAIL(txq) (txq->ift_size - get_inuse(txq->ift_size, txq->ift_cidx, txq->ift_pidx, txq->ift_gen)) 408 409#define IDXDIFF(head, tail, wrap) \ 410 ((head) >= (tail) ? (head) - (tail) : (wrap) - (tail) + (head)) 411 412struct iflib_rxq { 413 /* If there is a separate completion queue - 414 * these are the cq cidx and pidx. Otherwise 415 * these are unused. 416 */ 417 uint16_t ifr_size; 418 uint16_t ifr_cq_cidx; 419 uint16_t ifr_cq_pidx; 420 uint8_t ifr_cq_gen; 421 uint8_t ifr_fl_offset; 422 423 if_ctx_t ifr_ctx; 424 iflib_fl_t ifr_fl; 425 uint64_t ifr_rx_irq; 426 uint16_t ifr_id; 427 uint8_t ifr_lro_enabled; 428 uint8_t ifr_nfl; 429 struct lro_ctrl ifr_lc; 430 struct grouptask ifr_task; 431 struct iflib_filter_info ifr_filter_info; 432 iflib_dma_info_t ifr_ifdi; 433 /* dynamically allocate if any drivers need a value substantially larger than this */ 434 struct if_rxd_frag ifr_frags[IFLIB_MAX_RX_SEGS] __aligned(CACHE_LINE_SIZE); 435} __aligned(CACHE_LINE_SIZE); 436 437/* 438 * Only allow a single packet to take up most 1/nth of the tx ring 439 */ 440#define MAX_SINGLE_PACKET_FRACTION 12 441#define IF_BAD_DMA (bus_addr_t)-1 442 443static int enable_msix = 1; 444 445#define mtx_held(m) (((m)->mtx_lock & ~MTX_FLAGMASK) != (uintptr_t)0) 446 447 448 449#define CTX_ACTIVE(ctx) ((if_getdrvflags((ctx)->ifc_ifp) & IFF_DRV_RUNNING)) 450 451#define CTX_LOCK_INIT(_sc, _name) mtx_init(&(_sc)->ifc_mtx, _name, "iflib ctx lock", MTX_DEF) 452 453#define CTX_LOCK(ctx) mtx_lock(&(ctx)->ifc_mtx) 454#define CTX_UNLOCK(ctx) mtx_unlock(&(ctx)->ifc_mtx) 455#define CTX_LOCK_DESTROY(ctx) mtx_destroy(&(ctx)->ifc_mtx) 456 457 458#define TXDB_LOCK_INIT(txq) mtx_init(&(txq)->ift_db_mtx, (txq)->ift_db_mtx_name, NULL, MTX_DEF) 459#define TXDB_TRYLOCK(txq) mtx_trylock(&(txq)->ift_db_mtx) 460#define TXDB_LOCK(txq) mtx_lock(&(txq)->ift_db_mtx) 461#define TXDB_UNLOCK(txq) mtx_unlock(&(txq)->ift_db_mtx) 462#define TXDB_LOCK_DESTROY(txq) mtx_destroy(&(txq)->ift_db_mtx) 463 464#define CALLOUT_LOCK(txq) mtx_lock(&txq->ift_mtx) 465#define CALLOUT_UNLOCK(txq) mtx_unlock(&txq->ift_mtx) 466 467 468/* Our boot-time initialization hook */ 469static int iflib_module_event_handler(module_t, int, void *); 470 471static moduledata_t iflib_moduledata = { 472 "iflib", 473 iflib_module_event_handler, 474 NULL 475}; 476 477DECLARE_MODULE(iflib, iflib_moduledata, SI_SUB_INIT_IF, SI_ORDER_ANY); 478MODULE_VERSION(iflib, 1); 479 480MODULE_DEPEND(iflib, pci, 1, 1, 1); 481MODULE_DEPEND(iflib, ether, 1, 1, 1); 482 483TASKQGROUP_DEFINE(if_config_tqg, 1, 1); 484 485#ifndef IFLIB_DEBUG_COUNTERS 486#ifdef INVARIANTS 487#define IFLIB_DEBUG_COUNTERS 1 488#else 489#define IFLIB_DEBUG_COUNTERS 0 490#endif /* !INVARIANTS */ 491#endif 492 493static SYSCTL_NODE(_net, OID_AUTO, iflib, CTLFLAG_RD, 0, 494 "iflib driver parameters"); 495 496/* 497 * XXX need to ensure that this can't accidentally cause the head to be moved backwards 498 */ 499static int iflib_min_tx_latency = 0; 500 501SYSCTL_INT(_net_iflib, OID_AUTO, min_tx_latency, CTLFLAG_RW, 502 &iflib_min_tx_latency, 0, "minimize transmit latency at the possibel expense of throughput"); 503 504 505#if IFLIB_DEBUG_COUNTERS 506 507static int iflib_tx_seen; 508static int iflib_tx_sent; 509static int iflib_tx_encap; 510static int iflib_rx_allocs; 511static int iflib_fl_refills; 512static int iflib_fl_refills_large; 513static int iflib_tx_frees; 514 515SYSCTL_INT(_net_iflib, OID_AUTO, tx_seen, CTLFLAG_RD, 516 &iflib_tx_seen, 0, "# tx mbufs seen"); 517SYSCTL_INT(_net_iflib, OID_AUTO, tx_sent, CTLFLAG_RD, 518 &iflib_tx_sent, 0, "# tx mbufs sent"); 519SYSCTL_INT(_net_iflib, OID_AUTO, tx_encap, CTLFLAG_RD, 520 &iflib_tx_encap, 0, "# tx mbufs encapped"); 521SYSCTL_INT(_net_iflib, OID_AUTO, tx_frees, CTLFLAG_RD, 522 &iflib_tx_frees, 0, "# tx frees"); 523SYSCTL_INT(_net_iflib, OID_AUTO, rx_allocs, CTLFLAG_RD, 524 &iflib_rx_allocs, 0, "# rx allocations"); 525SYSCTL_INT(_net_iflib, OID_AUTO, fl_refills, CTLFLAG_RD, 526 &iflib_fl_refills, 0, "# refills"); 527SYSCTL_INT(_net_iflib, OID_AUTO, fl_refills_large, CTLFLAG_RD, 528 &iflib_fl_refills_large, 0, "# large refills"); 529 530 531static int iflib_txq_drain_flushing; 532static int iflib_txq_drain_oactive; 533static int iflib_txq_drain_notready; 534static int iflib_txq_drain_encapfail; 535 536SYSCTL_INT(_net_iflib, OID_AUTO, txq_drain_flushing, CTLFLAG_RD, 537 &iflib_txq_drain_flushing, 0, "# drain flushes"); 538SYSCTL_INT(_net_iflib, OID_AUTO, txq_drain_oactive, CTLFLAG_RD, 539 &iflib_txq_drain_oactive, 0, "# drain oactives"); 540SYSCTL_INT(_net_iflib, OID_AUTO, txq_drain_notready, CTLFLAG_RD, 541 &iflib_txq_drain_notready, 0, "# drain notready"); 542SYSCTL_INT(_net_iflib, OID_AUTO, txq_drain_encapfail, CTLFLAG_RD, 543 &iflib_txq_drain_encapfail, 0, "# drain encap fails"); 544 545 546static int iflib_encap_load_mbuf_fail; 547static int iflib_encap_txq_avail_fail; 548static int iflib_encap_txd_encap_fail; 549 550SYSCTL_INT(_net_iflib, OID_AUTO, encap_load_mbuf_fail, CTLFLAG_RD, 551 &iflib_encap_load_mbuf_fail, 0, "# busdma load failures"); 552SYSCTL_INT(_net_iflib, OID_AUTO, encap_txq_avail_fail, CTLFLAG_RD, 553 &iflib_encap_txq_avail_fail, 0, "# txq avail failures"); 554SYSCTL_INT(_net_iflib, OID_AUTO, encap_txd_encap_fail, CTLFLAG_RD, 555 &iflib_encap_txd_encap_fail, 0, "# driver encap failures"); 556 557static int iflib_task_fn_rxs; 558static int iflib_rx_intr_enables; 559static int iflib_fast_intrs; 560static int iflib_intr_link; 561static int iflib_intr_msix; 562static int iflib_rx_unavail; 563static int iflib_rx_ctx_inactive; 564static int iflib_rx_zero_len; 565static int iflib_rx_if_input; 566static int iflib_rx_mbuf_null; 567static int iflib_rxd_flush; 568 569static int iflib_verbose_debug; 570 571SYSCTL_INT(_net_iflib, OID_AUTO, intr_link, CTLFLAG_RD, 572 &iflib_intr_link, 0, "# intr link calls"); 573SYSCTL_INT(_net_iflib, OID_AUTO, intr_msix, CTLFLAG_RD, 574 &iflib_intr_msix, 0, "# intr msix calls"); 575SYSCTL_INT(_net_iflib, OID_AUTO, task_fn_rx, CTLFLAG_RD, 576 &iflib_task_fn_rxs, 0, "# task_fn_rx calls"); 577SYSCTL_INT(_net_iflib, OID_AUTO, rx_intr_enables, CTLFLAG_RD, 578 &iflib_rx_intr_enables, 0, "# rx intr enables"); 579SYSCTL_INT(_net_iflib, OID_AUTO, fast_intrs, CTLFLAG_RD, 580 &iflib_fast_intrs, 0, "# fast_intr calls"); 581SYSCTL_INT(_net_iflib, OID_AUTO, rx_unavail, CTLFLAG_RD, 582 &iflib_rx_unavail, 0, "# times rxeof called with no available data"); 583SYSCTL_INT(_net_iflib, OID_AUTO, rx_ctx_inactive, CTLFLAG_RD, 584 &iflib_rx_ctx_inactive, 0, "# times rxeof called with inactive context"); 585SYSCTL_INT(_net_iflib, OID_AUTO, rx_zero_len, CTLFLAG_RD, 586 &iflib_rx_zero_len, 0, "# times rxeof saw zero len mbuf"); 587SYSCTL_INT(_net_iflib, OID_AUTO, rx_if_input, CTLFLAG_RD, 588 &iflib_rx_if_input, 0, "# times rxeof called if_input"); 589SYSCTL_INT(_net_iflib, OID_AUTO, rx_mbuf_null, CTLFLAG_RD, 590 &iflib_rx_mbuf_null, 0, "# times rxeof got null mbuf"); 591SYSCTL_INT(_net_iflib, OID_AUTO, rxd_flush, CTLFLAG_RD, 592 &iflib_rxd_flush, 0, "# times rxd_flush called"); 593SYSCTL_INT(_net_iflib, OID_AUTO, verbose_debug, CTLFLAG_RW, 594 &iflib_verbose_debug, 0, "enable verbose debugging"); 595 596#define DBG_COUNTER_INC(name) atomic_add_int(&(iflib_ ## name), 1) 597 598#else 599#define DBG_COUNTER_INC(name) 600 601#endif 602 603 604 605#define IFLIB_DEBUG 0 606 607static void iflib_tx_structures_free(if_ctx_t ctx); 608static void iflib_rx_structures_free(if_ctx_t ctx); 609static int iflib_queues_alloc(if_ctx_t ctx); 610static int iflib_tx_credits_update(if_ctx_t ctx, iflib_txq_t txq); 611static int iflib_rxd_avail(if_ctx_t ctx, iflib_rxq_t rxq, int cidx, int budget); 612static int iflib_qset_structures_setup(if_ctx_t ctx); 613static int iflib_msix_init(if_ctx_t ctx); 614static int iflib_legacy_setup(if_ctx_t ctx, driver_filter_t filter, void *filterarg, int *rid, char *str); 615static void iflib_txq_check_drain(iflib_txq_t txq, int budget); 616static uint32_t iflib_txq_can_drain(struct ifmp_ring *); 617static int iflib_register(if_ctx_t); 618static void iflib_init_locked(if_ctx_t ctx); 619static void iflib_add_device_sysctl_pre(if_ctx_t ctx); 620static void iflib_add_device_sysctl_post(if_ctx_t ctx); 621 622 623#ifdef DEV_NETMAP 624#include <sys/selinfo.h> 625#include <net/netmap.h> 626#include <dev/netmap/netmap_kern.h> 627 628MODULE_DEPEND(iflib, netmap, 1, 1, 1); 629 630/* 631 * device-specific sysctl variables: 632 * 633 * iflib_crcstrip: 0: keep CRC in rx frames (default), 1: strip it. 634 * During regular operations the CRC is stripped, but on some 635 * hardware reception of frames not multiple of 64 is slower, 636 * so using crcstrip=0 helps in benchmarks. 637 * 638 * iflib_rx_miss, iflib_rx_miss_bufs: 639 * count packets that might be missed due to lost interrupts. 640 */ 641SYSCTL_DECL(_dev_netmap); 642/* 643 * The xl driver by default strips CRCs and we do not override it. 644 */ 645 646int iflib_crcstrip = 1; 647SYSCTL_INT(_dev_netmap, OID_AUTO, iflib_crcstrip, 648 CTLFLAG_RW, &iflib_crcstrip, 1, "strip CRC on rx frames"); 649 650int iflib_rx_miss, iflib_rx_miss_bufs; 651SYSCTL_INT(_dev_netmap, OID_AUTO, iflib_rx_miss, 652 CTLFLAG_RW, &iflib_rx_miss, 0, "potentially missed rx intr"); 653SYSCTL_INT(_dev_netmap, OID_AUTO, iflib_rx_miss_bufs, 654 CTLFLAG_RW, &iflib_rx_miss_bufs, 0, "potentially missed rx intr bufs"); 655 656/* 657 * Register/unregister. We are already under netmap lock. 658 * Only called on the first register or the last unregister. 659 */ 660static int 661iflib_netmap_register(struct netmap_adapter *na, int onoff) 662{ 663 struct ifnet *ifp = na->ifp; 664 if_ctx_t ctx = ifp->if_softc; 665 666 CTX_LOCK(ctx); 667 IFDI_INTR_DISABLE(ctx); 668 669 /* Tell the stack that the interface is no longer active */ 670 ifp->if_drv_flags &= ~(IFF_DRV_RUNNING | IFF_DRV_OACTIVE); 671 672 if (!CTX_IS_VF(ctx)) 673 IFDI_CRCSTRIP_SET(ctx, onoff); 674 675 /* enable or disable flags and callbacks in na and ifp */ 676 if (onoff) { 677 nm_set_native_flags(na); 678 } else { 679 nm_clear_native_flags(na); 680 } 681 IFDI_INIT(ctx); 682 IFDI_CRCSTRIP_SET(ctx, onoff); // XXX why twice ? 683 CTX_UNLOCK(ctx); 684 return (ifp->if_drv_flags & IFF_DRV_RUNNING ? 0 : 1); 685} 686 687/* 688 * Reconcile kernel and user view of the transmit ring. 689 * 690 * All information is in the kring. 691 * Userspace wants to send packets up to the one before kring->rhead, 692 * kernel knows kring->nr_hwcur is the first unsent packet. 693 * 694 * Here we push packets out (as many as possible), and possibly 695 * reclaim buffers from previously completed transmission. 696 * 697 * The caller (netmap) guarantees that there is only one instance 698 * running at any time. Any interference with other driver 699 * methods should be handled by the individual drivers. 700 */ 701static int 702iflib_netmap_txsync(struct netmap_kring *kring, int flags) 703{ 704 struct netmap_adapter *na = kring->na; 705 struct ifnet *ifp = na->ifp; 706 struct netmap_ring *ring = kring->ring; 707 u_int nm_i; /* index into the netmap ring */ 708 u_int nic_i; /* index into the NIC ring */ 709 u_int n; 710 u_int const lim = kring->nkr_num_slots - 1; 711 u_int const head = kring->rhead; 712 struct if_pkt_info pi; 713 714 /* 715 * interrupts on every tx packet are expensive so request 716 * them every half ring, or where NS_REPORT is set 717 */ 718 u_int report_frequency = kring->nkr_num_slots >> 1; 719 /* device-specific */ 720 if_ctx_t ctx = ifp->if_softc; 721 iflib_txq_t txq = &ctx->ifc_txqs[kring->ring_id]; 722 723 pi.ipi_segs = txq->ift_segs; 724 pi.ipi_qsidx = kring->ring_id; 725 pi.ipi_ndescs = 0; 726 727 bus_dmamap_sync(txq->ift_desc_tag, txq->ift_ifdi->idi_map, 728 BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE); 729 730 731 /* 732 * First part: process new packets to send. 733 * nm_i is the current index in the netmap ring, 734 * nic_i is the corresponding index in the NIC ring. 735 * 736 * If we have packets to send (nm_i != head) 737 * iterate over the netmap ring, fetch length and update 738 * the corresponding slot in the NIC ring. Some drivers also 739 * need to update the buffer's physical address in the NIC slot 740 * even NS_BUF_CHANGED is not set (PNMB computes the addresses). 741 * 742 * The netmap_reload_map() calls is especially expensive, 743 * even when (as in this case) the tag is 0, so do only 744 * when the buffer has actually changed. 745 * 746 * If possible do not set the report/intr bit on all slots, 747 * but only a few times per ring or when NS_REPORT is set. 748 * 749 * Finally, on 10G and faster drivers, it might be useful 750 * to prefetch the next slot and txr entry. 751 */ 752 753 nm_i = kring->nr_hwcur; 754 if (nm_i != head) { /* we have new packets to send */ 755 nic_i = netmap_idx_k2n(kring, nm_i); 756 757 __builtin_prefetch(&ring->slot[nm_i]); 758 __builtin_prefetch(&txq->ift_sds.ifsd_m[nic_i]); 759 __builtin_prefetch(&txq->ift_sds.ifsd_map[nic_i]); 760 761 for (n = 0; nm_i != head; n++) { 762 struct netmap_slot *slot = &ring->slot[nm_i]; 763 u_int len = slot->len; 764 uint64_t paddr; 765 void *addr = PNMB(na, slot, &paddr); 766 int flags = (slot->flags & NS_REPORT || 767 nic_i == 0 || nic_i == report_frequency) ? 768 IPI_TX_INTR : 0; 769 770 /* device-specific */ 771 pi.ipi_pidx = nic_i; 772 pi.ipi_flags = flags; 773 774 /* Fill the slot in the NIC ring. */ 775 ctx->isc_txd_encap(ctx->ifc_softc, &pi); 776 777 /* prefetch for next round */ 778 __builtin_prefetch(&ring->slot[nm_i + 1]); 779 __builtin_prefetch(&txq->ift_sds.ifsd_m[nic_i + 1]); 780 __builtin_prefetch(&txq->ift_sds.ifsd_map[nic_i + 1]); 781 782 NM_CHECK_ADDR_LEN(na, addr, len); 783 784 if (slot->flags & NS_BUF_CHANGED) { 785 /* buffer has changed, reload map */ 786 netmap_reload_map(na, txq->ift_desc_tag, txq->ift_sds.ifsd_map[nic_i], addr); 787 } 788 slot->flags &= ~(NS_REPORT | NS_BUF_CHANGED); 789 790 /* make sure changes to the buffer are synced */ 791 bus_dmamap_sync(txq->ift_ifdi->idi_tag, txq->ift_sds.ifsd_map[nic_i], 792 BUS_DMASYNC_PREWRITE); 793 794 nm_i = nm_next(nm_i, lim); 795 nic_i = nm_next(nic_i, lim); 796 } 797 kring->nr_hwcur = head; 798 799 /* synchronize the NIC ring */ 800 bus_dmamap_sync(txq->ift_desc_tag, txq->ift_ifdi->idi_map, 801 BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); 802 803 /* (re)start the tx unit up to slot nic_i (excluded) */ 804 ctx->isc_txd_flush(ctx->ifc_softc, txq->ift_id, nic_i); 805 } 806 807 /* 808 * Second part: reclaim buffers for completed transmissions. 809 */ 810 if (iflib_tx_credits_update(ctx, txq)) { 811 /* some tx completed, increment avail */ 812 nic_i = txq->ift_cidx_processed; 813 kring->nr_hwtail = nm_prev(netmap_idx_n2k(kring, nic_i), lim); 814 } 815 return (0); 816} 817 818/* 819 * Reconcile kernel and user view of the receive ring. 820 * Same as for the txsync, this routine must be efficient. 821 * The caller guarantees a single invocations, but races against 822 * the rest of the driver should be handled here. 823 * 824 * On call, kring->rhead is the first packet that userspace wants 825 * to keep, and kring->rcur is the wakeup point. 826 * The kernel has previously reported packets up to kring->rtail. 827 * 828 * If (flags & NAF_FORCE_READ) also check for incoming packets irrespective 829 * of whether or not we received an interrupt. 830 */ 831static int 832iflib_netmap_rxsync(struct netmap_kring *kring, int flags) 833{ 834 struct netmap_adapter *na = kring->na; 835 struct ifnet *ifp = na->ifp; 836 struct netmap_ring *ring = kring->ring; 837 u_int nm_i; /* index into the netmap ring */ 838 u_int nic_i; /* index into the NIC ring */ 839 u_int i, n; 840 u_int const lim = kring->nkr_num_slots - 1; 841 u_int const head = kring->rhead; 842 int force_update = (flags & NAF_FORCE_READ) || kring->nr_kflags & NKR_PENDINTR; 843 struct if_rxd_info ri; 844 /* device-specific */ 845 if_ctx_t ctx = ifp->if_softc; 846 iflib_rxq_t rxq = &ctx->ifc_rxqs[kring->ring_id]; 847 iflib_fl_t fl = rxq->ifr_fl; 848 if (head > lim) 849 return netmap_ring_reinit(kring); 850 851 bzero(&ri, sizeof(ri)); 852 ri.iri_qsidx = kring->ring_id; 853 ri.iri_ifp = ctx->ifc_ifp; 854 /* XXX check sync modes */ 855 for (i = 0, fl = rxq->ifr_fl; i < rxq->ifr_nfl; i++, fl++) 856 bus_dmamap_sync(rxq->ifr_fl[i].ifl_desc_tag, fl->ifl_ifdi->idi_map, 857 BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE); 858 859 /* 860 * First part: import newly received packets. 861 * 862 * nm_i is the index of the next free slot in the netmap ring, 863 * nic_i is the index of the next received packet in the NIC ring, 864 * and they may differ in case if_init() has been called while 865 * in netmap mode. For the receive ring we have 866 * 867 * nic_i = rxr->next_check; 868 * nm_i = kring->nr_hwtail (previous) 869 * and 870 * nm_i == (nic_i + kring->nkr_hwofs) % ring_size 871 * 872 * rxr->next_check is set to 0 on a ring reinit 873 */ 874 if (netmap_no_pendintr || force_update) { 875 int crclen = iflib_crcstrip ? 0 : 4; 876 int error, avail; 877 uint16_t slot_flags = kring->nkr_slot_flags; 878 879 for (fl = rxq->ifr_fl, i = 0; i < rxq->ifr_nfl; i++, fl++) { 880 nic_i = fl->ifl_cidx; 881 nm_i = netmap_idx_n2k(kring, nic_i); 882 avail = ctx->isc_rxd_available(ctx->ifc_softc, kring->ring_id, nic_i, INT_MAX); 883 for (n = 0; avail > 0; n++, avail--) { 884 error = ctx->isc_rxd_pkt_get(ctx->ifc_softc, &ri); 885 if (error) 886 ring->slot[nm_i].len = 0; 887 else 888 ring->slot[nm_i].len = ri.iri_len - crclen; 889 ring->slot[nm_i].flags = slot_flags; 890 bus_dmamap_sync(fl->ifl_ifdi->idi_tag, 891 fl->ifl_sds[nic_i].ifsd_map, BUS_DMASYNC_POSTREAD); 892 nm_i = nm_next(nm_i, lim); 893 nic_i = nm_next(nic_i, lim); 894 } 895 if (n) { /* update the state variables */ 896 if (netmap_no_pendintr && !force_update) { 897 /* diagnostics */ 898 iflib_rx_miss ++; 899 iflib_rx_miss_bufs += n; 900 } 901 fl->ifl_cidx = nic_i; 902 kring->nr_hwtail = nm_i; 903 } 904 kring->nr_kflags &= ~NKR_PENDINTR; 905 } 906 } 907 /* 908 * Second part: skip past packets that userspace has released. 909 * (kring->nr_hwcur to head excluded), 910 * and make the buffers available for reception. 911 * As usual nm_i is the index in the netmap ring, 912 * nic_i is the index in the NIC ring, and 913 * nm_i == (nic_i + kring->nkr_hwofs) % ring_size 914 */ 915 /* XXX not sure how this will work with multiple free lists */ 916 nm_i = kring->nr_hwcur; 917 if (nm_i != head) { 918 nic_i = netmap_idx_k2n(kring, nm_i); 919 for (n = 0; nm_i != head; n++) { 920 struct netmap_slot *slot = &ring->slot[nm_i]; 921 uint64_t paddr; 922 caddr_t vaddr; 923 void *addr = PNMB(na, slot, &paddr); 924 925 if (addr == NETMAP_BUF_BASE(na)) /* bad buf */ 926 goto ring_reset; 927 928 vaddr = addr; 929 if (slot->flags & NS_BUF_CHANGED) { 930 /* buffer has changed, reload map */ 931 netmap_reload_map(na, fl->ifl_ifdi->idi_tag, fl->ifl_sds[nic_i].ifsd_map, addr); 932 slot->flags &= ~NS_BUF_CHANGED; 933 } 934 /* 935 * XXX we should be batching this operation - TODO 936 */ 937 ctx->isc_rxd_refill(ctx->ifc_softc, rxq->ifr_id, fl->ifl_id, nic_i, &paddr, &vaddr, 1, fl->ifl_buf_size); 938 bus_dmamap_sync(fl->ifl_ifdi->idi_tag, fl->ifl_sds[nic_i].ifsd_map, 939 BUS_DMASYNC_PREREAD); 940 nm_i = nm_next(nm_i, lim); 941 nic_i = nm_next(nic_i, lim); 942 } 943 kring->nr_hwcur = head; 944 945 bus_dmamap_sync(fl->ifl_ifdi->idi_tag, fl->ifl_ifdi->idi_map, 946 BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); 947 /* 948 * IMPORTANT: we must leave one free slot in the ring, 949 * so move nic_i back by one unit 950 */ 951 nic_i = nm_prev(nic_i, lim); 952 ctx->isc_rxd_flush(ctx->ifc_softc, rxq->ifr_id, fl->ifl_id, nic_i); 953 } 954 955 return 0; 956 957ring_reset: 958 return netmap_ring_reinit(kring); 959} 960 961static int 962iflib_netmap_attach(if_ctx_t ctx) 963{ 964 struct netmap_adapter na; 965 if_softc_ctx_t scctx = &ctx->ifc_softc_ctx; 966 967 bzero(&na, sizeof(na)); 968 969 na.ifp = ctx->ifc_ifp; 970 na.na_flags = NAF_BDG_MAYSLEEP; 971 MPASS(ctx->ifc_softc_ctx.isc_ntxqsets); 972 MPASS(ctx->ifc_softc_ctx.isc_nrxqsets); 973 974 na.num_tx_desc = scctx->isc_ntxd[0]; 975 na.num_rx_desc = scctx->isc_nrxd[0]; 976 na.nm_txsync = iflib_netmap_txsync; 977 na.nm_rxsync = iflib_netmap_rxsync; 978 na.nm_register = iflib_netmap_register; 979 na.num_tx_rings = ctx->ifc_softc_ctx.isc_ntxqsets; 980 na.num_rx_rings = ctx->ifc_softc_ctx.isc_nrxqsets; 981 return (netmap_attach(&na)); 982} 983 984static void 985iflib_netmap_txq_init(if_ctx_t ctx, iflib_txq_t txq) 986{ 987 struct netmap_adapter *na = NA(ctx->ifc_ifp); 988 struct netmap_slot *slot; 989 990 slot = netmap_reset(na, NR_TX, txq->ift_id, 0); 991 if (slot == NULL) 992 return; 993 994 for (int i = 0; i < ctx->ifc_softc_ctx.isc_ntxd[0]; i++) { 995 996 /* 997 * In netmap mode, set the map for the packet buffer. 998 * NOTE: Some drivers (not this one) also need to set 999 * the physical buffer address in the NIC ring. 1000 * netmap_idx_n2k() maps a nic index, i, into the corresponding 1001 * netmap slot index, si 1002 */ 1003 int si = netmap_idx_n2k(&na->tx_rings[txq->ift_id], i); 1004 netmap_load_map(na, txq->ift_desc_tag, txq->ift_sds.ifsd_map[i], NMB(na, slot + si)); 1005 } 1006} 1007static void 1008iflib_netmap_rxq_init(if_ctx_t ctx, iflib_rxq_t rxq) 1009{ 1010 struct netmap_adapter *na = NA(ctx->ifc_ifp); 1011 struct netmap_slot *slot; 1012 iflib_rxsd_t sd; 1013 int nrxd; 1014 1015 slot = netmap_reset(na, NR_RX, rxq->ifr_id, 0); 1016 if (slot == NULL) 1017 return; 1018 sd = rxq->ifr_fl[0].ifl_sds; 1019 nrxd = ctx->ifc_softc_ctx.isc_nrxd[0]; 1020 for (int i = 0; i < nrxd; i++, sd++) { 1021 int sj = netmap_idx_n2k(&na->rx_rings[rxq->ifr_id], i); 1022 uint64_t paddr; 1023 void *addr; 1024 caddr_t vaddr; 1025 1026 vaddr = addr = PNMB(na, slot + sj, &paddr); 1027 netmap_load_map(na, rxq->ifr_fl[0].ifl_ifdi->idi_tag, sd->ifsd_map, addr); 1028 /* Update descriptor and the cached value */ 1029 ctx->isc_rxd_refill(ctx->ifc_softc, rxq->ifr_id, 0 /* fl_id */, i, &paddr, &vaddr, 1, rxq->ifr_fl[0].ifl_buf_size); 1030 } 1031 /* preserve queue */ 1032 if (ctx->ifc_ifp->if_capenable & IFCAP_NETMAP) { 1033 struct netmap_kring *kring = &na->rx_rings[rxq->ifr_id]; 1034 int t = na->num_rx_desc - 1 - nm_kr_rxspace(kring); 1035 ctx->isc_rxd_flush(ctx->ifc_softc, rxq->ifr_id, 0 /* fl_id */, t); 1036 } else 1037 ctx->isc_rxd_flush(ctx->ifc_softc, rxq->ifr_id, 0 /* fl_id */, nrxd-1); 1038} 1039 1040#define iflib_netmap_detach(ifp) netmap_detach(ifp) 1041 1042#else 1043#define iflib_netmap_txq_init(ctx, txq) 1044#define iflib_netmap_rxq_init(ctx, rxq) 1045#define iflib_netmap_detach(ifp) 1046 1047#define iflib_netmap_attach(ctx) (0) 1048#define netmap_rx_irq(ifp, qid, budget) (0) 1049 1050#endif 1051 1052#if defined(__i386__) || defined(__amd64__) 1053static __inline void 1054prefetch(void *x) 1055{ 1056 __asm volatile("prefetcht0 %0" :: "m" (*(unsigned long *)x)); 1057} 1058#else 1059#define prefetch(x) 1060#endif 1061 1062static void 1063_iflib_dmamap_cb(void *arg, bus_dma_segment_t *segs, int nseg, int err) 1064{ 1065 if (err) 1066 return; 1067 *(bus_addr_t *) arg = segs[0].ds_addr; 1068} 1069 1070int 1071iflib_dma_alloc(if_ctx_t ctx, int size, iflib_dma_info_t dma, int mapflags) 1072{ 1073 int err; 1074 if_shared_ctx_t sctx = ctx->ifc_sctx; 1075 device_t dev = ctx->ifc_dev; 1076 1077 KASSERT(sctx->isc_q_align != 0, ("alignment value not initialized")); 1078 1079 err = bus_dma_tag_create(bus_get_dma_tag(dev), /* parent */ 1080 sctx->isc_q_align, 0, /* alignment, bounds */ 1081 BUS_SPACE_MAXADDR, /* lowaddr */ 1082 BUS_SPACE_MAXADDR, /* highaddr */ 1083 NULL, NULL, /* filter, filterarg */ 1084 size, /* maxsize */ 1085 1, /* nsegments */ 1086 size, /* maxsegsize */ 1087 BUS_DMA_ALLOCNOW, /* flags */ 1088 NULL, /* lockfunc */ 1089 NULL, /* lockarg */ 1090 &dma->idi_tag); 1091 if (err) { 1092 device_printf(dev, 1093 "%s: bus_dma_tag_create failed: %d\n", 1094 __func__, err); 1095 goto fail_0; 1096 } 1097 1098 err = bus_dmamem_alloc(dma->idi_tag, (void**) &dma->idi_vaddr, 1099 BUS_DMA_NOWAIT | BUS_DMA_COHERENT | BUS_DMA_ZERO, &dma->idi_map); 1100 if (err) { 1101 device_printf(dev, 1102 "%s: bus_dmamem_alloc(%ju) failed: %d\n", 1103 __func__, (uintmax_t)size, err); 1104 goto fail_1; 1105 } 1106 1107 dma->idi_paddr = IF_BAD_DMA; 1108 err = bus_dmamap_load(dma->idi_tag, dma->idi_map, dma->idi_vaddr, 1109 size, _iflib_dmamap_cb, &dma->idi_paddr, mapflags | BUS_DMA_NOWAIT); 1110 if (err || dma->idi_paddr == IF_BAD_DMA) { 1111 device_printf(dev, 1112 "%s: bus_dmamap_load failed: %d\n", 1113 __func__, err); 1114 goto fail_2; 1115 } 1116 1117 dma->idi_size = size; 1118 return (0); 1119 1120fail_2: 1121 bus_dmamem_free(dma->idi_tag, dma->idi_vaddr, dma->idi_map); 1122fail_1: 1123 bus_dma_tag_destroy(dma->idi_tag); 1124fail_0: 1125 dma->idi_tag = NULL; 1126 1127 return (err); 1128} 1129 1130int 1131iflib_dma_alloc_multi(if_ctx_t ctx, int *sizes, iflib_dma_info_t *dmalist, int mapflags, int count) 1132{ 1133 int i, err; 1134 iflib_dma_info_t *dmaiter; 1135 1136 dmaiter = dmalist; 1137 for (i = 0; i < count; i++, dmaiter++) { 1138 if ((err = iflib_dma_alloc(ctx, sizes[i], *dmaiter, mapflags)) != 0) 1139 break; 1140 } 1141 if (err) 1142 iflib_dma_free_multi(dmalist, i); 1143 return (err); 1144} 1145 1146void 1147iflib_dma_free(iflib_dma_info_t dma) 1148{ 1149 if (dma->idi_tag == NULL) 1150 return; 1151 if (dma->idi_paddr != IF_BAD_DMA) { 1152 bus_dmamap_sync(dma->idi_tag, dma->idi_map, 1153 BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE); 1154 bus_dmamap_unload(dma->idi_tag, dma->idi_map); 1155 dma->idi_paddr = IF_BAD_DMA; 1156 } 1157 if (dma->idi_vaddr != NULL) { 1158 bus_dmamem_free(dma->idi_tag, dma->idi_vaddr, dma->idi_map); 1159 dma->idi_vaddr = NULL; 1160 } 1161 bus_dma_tag_destroy(dma->idi_tag); 1162 dma->idi_tag = NULL; 1163} 1164 1165void 1166iflib_dma_free_multi(iflib_dma_info_t *dmalist, int count) 1167{ 1168 int i; 1169 iflib_dma_info_t *dmaiter = dmalist; 1170 1171 for (i = 0; i < count; i++, dmaiter++) 1172 iflib_dma_free(*dmaiter); 1173} 1174 1175static int 1176iflib_fast_intr(void *arg) 1177{ 1178 iflib_filter_info_t info = arg; 1179 struct grouptask *gtask = info->ifi_task; 1180 1181 DBG_COUNTER_INC(fast_intrs); 1182 if (info->ifi_filter != NULL && info->ifi_filter(info->ifi_filter_arg) == FILTER_HANDLED) 1183 return (FILTER_HANDLED); 1184 1185 GROUPTASK_ENQUEUE(gtask); 1186 return (FILTER_HANDLED); 1187} 1188 1189static int 1190_iflib_irq_alloc(if_ctx_t ctx, if_irq_t irq, int rid, 1191 driver_filter_t filter, driver_intr_t handler, void *arg, 1192 char *name) 1193{ 1194 int rc; 1195 struct resource *res; 1196 void *tag; 1197 device_t dev = ctx->ifc_dev; 1198 1199 MPASS(rid < 512); 1200 irq->ii_rid = rid; 1201 res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &irq->ii_rid, 1202 RF_SHAREABLE | RF_ACTIVE); 1203 if (res == NULL) { 1204 device_printf(dev, 1205 "failed to allocate IRQ for rid %d, name %s.\n", rid, name); 1206 return (ENOMEM); 1207 } 1208 irq->ii_res = res; 1209 KASSERT(filter == NULL || handler == NULL, ("filter and handler can't both be non-NULL")); 1210 rc = bus_setup_intr(dev, res, INTR_MPSAFE | INTR_TYPE_NET, 1211 filter, handler, arg, &tag); 1212 if (rc != 0) { 1213 device_printf(dev, 1214 "failed to setup interrupt for rid %d, name %s: %d\n", 1215 rid, name ? name : "unknown", rc); 1216 return (rc); 1217 } else if (name) 1218 bus_describe_intr(dev, res, tag, "%s", name); 1219 1220 irq->ii_tag = tag; 1221 return (0); 1222} 1223 1224 1225/********************************************************************* 1226 * 1227 * Allocate memory for tx_buffer structures. The tx_buffer stores all 1228 * the information needed to transmit a packet on the wire. This is 1229 * called only once at attach, setup is done every reset. 1230 * 1231 **********************************************************************/ 1232 1233static int 1234iflib_txsd_alloc(iflib_txq_t txq) 1235{ 1236 if_ctx_t ctx = txq->ift_ctx; 1237 if_shared_ctx_t sctx = ctx->ifc_sctx; 1238 if_softc_ctx_t scctx = &ctx->ifc_softc_ctx; 1239 device_t dev = ctx->ifc_dev; 1240 int err, nsegments, ntsosegments; 1241 1242 nsegments = scctx->isc_tx_nsegments; 1243 ntsosegments = scctx->isc_tx_tso_segments_max; 1244 MPASS(scctx->isc_ntxd[0] > 0); 1245 MPASS(scctx->isc_ntxd[txq->ift_br_offset] > 0); 1246 MPASS(nsegments > 0); 1247 MPASS(ntsosegments > 0); 1248 /* 1249 * Setup DMA descriptor areas. 1250 */ 1251 if ((err = bus_dma_tag_create(bus_get_dma_tag(dev), 1252 1, 0, /* alignment, bounds */ 1253 BUS_SPACE_MAXADDR, /* lowaddr */ 1254 BUS_SPACE_MAXADDR, /* highaddr */ 1255 NULL, NULL, /* filter, filterarg */ 1256 sctx->isc_tx_maxsize, /* maxsize */ 1257 nsegments, /* nsegments */ 1258 sctx->isc_tx_maxsegsize, /* maxsegsize */ 1259 0, /* flags */ 1260 NULL, /* lockfunc */ 1261 NULL, /* lockfuncarg */ 1262 &txq->ift_desc_tag))) { 1263 device_printf(dev,"Unable to allocate TX DMA tag: %d\n", err); 1264 device_printf(dev,"maxsize: %ju nsegments: %d maxsegsize: %ju\n", 1265 (uintmax_t)sctx->isc_tx_maxsize, nsegments, (uintmax_t)sctx->isc_tx_maxsegsize); 1266 goto fail; 1267 } 1268#ifdef IFLIB_DIAGNOSTICS 1269 device_printf(dev,"maxsize: %zd nsegments: %d maxsegsize: %zd\n", 1270 sctx->isc_tx_maxsize, nsegments, sctx->isc_tx_maxsegsize); 1271 1272#endif 1273 if ((err = bus_dma_tag_create(bus_get_dma_tag(dev), 1274 1, 0, /* alignment, bounds */ 1275 BUS_SPACE_MAXADDR, /* lowaddr */ 1276 BUS_SPACE_MAXADDR, /* highaddr */ 1277 NULL, NULL, /* filter, filterarg */ 1278 scctx->isc_tx_tso_size_max, /* maxsize */ 1279 ntsosegments, /* nsegments */ 1280 scctx->isc_tx_tso_segsize_max, /* maxsegsize */ 1281 0, /* flags */ 1282 NULL, /* lockfunc */ 1283 NULL, /* lockfuncarg */ 1284 &txq->ift_tso_desc_tag))) { 1285 device_printf(dev,"Unable to allocate TX TSO DMA tag: %d\n", err); 1286 1287 goto fail; 1288 } 1289#ifdef IFLIB_DIAGNOSTICS 1290 device_printf(dev,"TSO maxsize: %d ntsosegments: %d maxsegsize: %d\n", 1291 scctx->isc_tx_tso_size_max, ntsosegments, 1292 scctx->isc_tx_tso_segsize_max); 1293#endif 1294 if (!(txq->ift_sds.ifsd_flags = 1295 (uint8_t *) malloc(sizeof(uint8_t) * 1296 scctx->isc_ntxd[txq->ift_br_offset], M_IFLIB, M_NOWAIT | M_ZERO))) { 1297 device_printf(dev, "Unable to allocate tx_buffer memory\n"); 1298 err = ENOMEM; 1299 goto fail; 1300 } 1301 if (!(txq->ift_sds.ifsd_m = 1302 (struct mbuf **) malloc(sizeof(struct mbuf *) * 1303 scctx->isc_ntxd[txq->ift_br_offset], M_IFLIB, M_NOWAIT | M_ZERO))) { 1304 device_printf(dev, "Unable to allocate tx_buffer memory\n"); 1305 err = ENOMEM; 1306 goto fail; 1307 } 1308 1309 /* Create the descriptor buffer dma maps */ 1310#if defined(ACPI_DMAR) || (!(defined(__i386__) && !defined(__amd64__))) 1311 if ((ctx->ifc_flags & IFC_DMAR) == 0) 1312 return (0); 1313 1314 if (!(txq->ift_sds.ifsd_map = 1315 (bus_dmamap_t *) malloc(sizeof(bus_dmamap_t) * scctx->isc_ntxd[txq->ift_br_offset], M_IFLIB, M_NOWAIT | M_ZERO))) { 1316 device_printf(dev, "Unable to allocate tx_buffer map memory\n"); 1317 err = ENOMEM; 1318 goto fail; 1319 } 1320 1321 for (int i = 0; i < scctx->isc_ntxd[txq->ift_br_offset]; i++) { 1322 err = bus_dmamap_create(txq->ift_desc_tag, 0, &txq->ift_sds.ifsd_map[i]); 1323 if (err != 0) { 1324 device_printf(dev, "Unable to create TX DMA map\n"); 1325 goto fail; 1326 } 1327 } 1328#endif 1329 return (0); 1330fail: 1331 /* We free all, it handles case where we are in the middle */ 1332 iflib_tx_structures_free(ctx); 1333 return (err); 1334} 1335 1336static void 1337iflib_txsd_destroy(if_ctx_t ctx, iflib_txq_t txq, int i) 1338{ 1339 bus_dmamap_t map; 1340 1341 map = NULL; 1342 if (txq->ift_sds.ifsd_map != NULL) 1343 map = txq->ift_sds.ifsd_map[i]; 1344 if (map != NULL) { 1345 bus_dmamap_unload(txq->ift_desc_tag, map); 1346 bus_dmamap_destroy(txq->ift_desc_tag, map); 1347 txq->ift_sds.ifsd_map[i] = NULL; 1348 } 1349} 1350 1351static void 1352iflib_txq_destroy(iflib_txq_t txq) 1353{ 1354 if_ctx_t ctx = txq->ift_ctx; 1355 1356 for (int i = 0; i < txq->ift_size; i++) 1357 iflib_txsd_destroy(ctx, txq, i); 1358 if (txq->ift_sds.ifsd_map != NULL) { 1359 free(txq->ift_sds.ifsd_map, M_IFLIB); 1360 txq->ift_sds.ifsd_map = NULL; 1361 } 1362 if (txq->ift_sds.ifsd_m != NULL) { 1363 free(txq->ift_sds.ifsd_m, M_IFLIB); 1364 txq->ift_sds.ifsd_m = NULL; 1365 } 1366 if (txq->ift_sds.ifsd_flags != NULL) { 1367 free(txq->ift_sds.ifsd_flags, M_IFLIB); 1368 txq->ift_sds.ifsd_flags = NULL; 1369 } 1370 if (txq->ift_desc_tag != NULL) { 1371 bus_dma_tag_destroy(txq->ift_desc_tag); 1372 txq->ift_desc_tag = NULL; 1373 } 1374 if (txq->ift_tso_desc_tag != NULL) { 1375 bus_dma_tag_destroy(txq->ift_tso_desc_tag); 1376 txq->ift_tso_desc_tag = NULL; 1377 } 1378} 1379 1380static void 1381iflib_txsd_free(if_ctx_t ctx, iflib_txq_t txq, int i) 1382{ 1383 struct mbuf **mp; 1384 1385 mp = &txq->ift_sds.ifsd_m[i]; 1386 if (*mp == NULL) 1387 return; 1388 1389 if (txq->ift_sds.ifsd_map != NULL) { 1390 bus_dmamap_sync(txq->ift_desc_tag, 1391 txq->ift_sds.ifsd_map[i], 1392 BUS_DMASYNC_POSTWRITE); 1393 bus_dmamap_unload(txq->ift_desc_tag, 1394 txq->ift_sds.ifsd_map[i]); 1395 } 1396 m_free(*mp); 1397 DBG_COUNTER_INC(tx_frees); 1398 *mp = NULL; 1399} 1400 1401static int 1402iflib_txq_setup(iflib_txq_t txq) 1403{ 1404 if_ctx_t ctx = txq->ift_ctx; 1405 if_softc_ctx_t scctx = &ctx->ifc_softc_ctx; 1406 iflib_dma_info_t di; 1407 int i; 1408 1409 /* Set number of descriptors available */ 1410 txq->ift_qstatus = IFLIB_QUEUE_IDLE; 1411 1412 /* Reset indices */ 1413 txq->ift_cidx_processed = txq->ift_pidx = txq->ift_cidx = txq->ift_npending = 0; 1414 txq->ift_size = scctx->isc_ntxd[txq->ift_br_offset]; 1415 1416 for (i = 0, di = txq->ift_ifdi; i < ctx->ifc_nhwtxqs; i++, di++) 1417 bzero((void *)di->idi_vaddr, di->idi_size); 1418 1419 IFDI_TXQ_SETUP(ctx, txq->ift_id); 1420 for (i = 0, di = txq->ift_ifdi; i < ctx->ifc_nhwtxqs; i++, di++) 1421 bus_dmamap_sync(di->idi_tag, di->idi_map, 1422 BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); 1423 return (0); 1424} 1425 1426/********************************************************************* 1427 * 1428 * Allocate memory for rx_buffer structures. Since we use one 1429 * rx_buffer per received packet, the maximum number of rx_buffer's 1430 * that we'll need is equal to the number of receive descriptors 1431 * that we've allocated. 1432 * 1433 **********************************************************************/ 1434static int 1435iflib_rxsd_alloc(iflib_rxq_t rxq) 1436{ 1437 if_ctx_t ctx = rxq->ifr_ctx; 1438 if_shared_ctx_t sctx = ctx->ifc_sctx; 1439 if_softc_ctx_t scctx = &ctx->ifc_softc_ctx; 1440 device_t dev = ctx->ifc_dev; 1441 iflib_fl_t fl; 1442 iflib_rxsd_t rxsd; 1443 int err; 1444 1445 MPASS(scctx->isc_nrxd[0] > 0); 1446 MPASS(scctx->isc_nrxd[rxq->ifr_fl_offset] > 0); 1447 1448 fl = rxq->ifr_fl; 1449 for (int i = 0; i < rxq->ifr_nfl; i++, fl++) { 1450 fl->ifl_sds = malloc(sizeof(struct iflib_sw_rx_desc) * 1451 scctx->isc_nrxd[rxq->ifr_fl_offset], M_IFLIB, 1452 M_WAITOK | M_ZERO); 1453 if (fl->ifl_sds == NULL) { 1454 device_printf(dev, "Unable to allocate rx sw desc memory\n"); 1455 return (ENOMEM); 1456 } 1457 fl->ifl_size = scctx->isc_nrxd[rxq->ifr_fl_offset]; /* this isn't necessarily the same */ 1458 err = bus_dma_tag_create(bus_get_dma_tag(dev), /* parent */ 1459 1, 0, /* alignment, bounds */ 1460 BUS_SPACE_MAXADDR, /* lowaddr */ 1461 BUS_SPACE_MAXADDR, /* highaddr */ 1462 NULL, NULL, /* filter, filterarg */ 1463 sctx->isc_rx_maxsize, /* maxsize */ 1464 sctx->isc_rx_nsegments, /* nsegments */ 1465 sctx->isc_rx_maxsegsize, /* maxsegsize */ 1466 0, /* flags */ 1467 NULL, /* lockfunc */ 1468 NULL, /* lockarg */ 1469 &fl->ifl_desc_tag); 1470 if (err) { 1471 device_printf(dev, "%s: bus_dma_tag_create failed %d\n", 1472 __func__, err); 1473 goto fail; 1474 } 1475 1476 rxsd = fl->ifl_sds; 1477 for (int i = 0; i < scctx->isc_nrxd[rxq->ifr_fl_offset]; i++, rxsd++) { 1478 err = bus_dmamap_create(fl->ifl_desc_tag, 0, &rxsd->ifsd_map); 1479 if (err) { 1480 device_printf(dev, "%s: bus_dmamap_create failed: %d\n", 1481 __func__, err); 1482 goto fail; 1483 } 1484 } 1485 } 1486 return (0); 1487 1488fail: 1489 iflib_rx_structures_free(ctx); 1490 return (err); 1491} 1492 1493 1494/* 1495 * Internal service routines 1496 */ 1497 1498struct rxq_refill_cb_arg { 1499 int error; 1500 bus_dma_segment_t seg; 1501 int nseg; 1502}; 1503 1504static void 1505_rxq_refill_cb(void *arg, bus_dma_segment_t *segs, int nseg, int error) 1506{ 1507 struct rxq_refill_cb_arg *cb_arg = arg; 1508 1509 cb_arg->error = error; 1510 cb_arg->seg = segs[0]; 1511 cb_arg->nseg = nseg; 1512} 1513 1514 1515#ifdef ACPI_DMAR 1516#define IS_DMAR(ctx) (ctx->ifc_flags & IFC_DMAR) 1517#else 1518#define IS_DMAR(ctx) (0) 1519#endif 1520 1521/** 1522 * rxq_refill - refill an rxq free-buffer list 1523 * @ctx: the iflib context 1524 * @rxq: the free-list to refill 1525 * @n: the number of new buffers to allocate 1526 * 1527 * (Re)populate an rxq free-buffer list with up to @n new packet buffers. 1528 * The caller must assure that @n does not exceed the queue's capacity. 1529 */ 1530static void 1531_iflib_fl_refill(if_ctx_t ctx, iflib_fl_t fl, int count) 1532{ 1533 struct mbuf *m; 1534 int pidx = fl->ifl_pidx; 1535 iflib_rxsd_t rxsd = &fl->ifl_sds[pidx]; 1536 caddr_t cl; 1537 int n, i = 0; 1538 uint64_t bus_addr; 1539 int err; 1540 1541 n = count; 1542 MPASS(n > 0); 1543 MPASS(fl->ifl_credits + n <= fl->ifl_size); 1544 1545 if (pidx < fl->ifl_cidx) 1546 MPASS(pidx + n <= fl->ifl_cidx); 1547 if (pidx == fl->ifl_cidx && (fl->ifl_credits < fl->ifl_size)) 1548 MPASS(fl->ifl_gen == 0); 1549 if (pidx > fl->ifl_cidx) 1550 MPASS(n <= fl->ifl_size - pidx + fl->ifl_cidx); 1551 1552 DBG_COUNTER_INC(fl_refills); 1553 if (n > 8) 1554 DBG_COUNTER_INC(fl_refills_large); 1555 1556 while (n--) { 1557 /* 1558 * We allocate an uninitialized mbuf + cluster, mbuf is 1559 * initialized after rx. 1560 * 1561 * If the cluster is still set then we know a minimum sized packet was received 1562 */ 1563 if ((cl = rxsd->ifsd_cl) == NULL) { 1564 if ((cl = rxsd->ifsd_cl = m_cljget(NULL, M_NOWAIT, fl->ifl_buf_size)) == NULL) 1565 break; 1566#if MEMORY_LOGGING 1567 fl->ifl_cl_enqueued++; 1568#endif 1569 } 1570 if ((m = m_gethdr(M_NOWAIT, MT_NOINIT)) == NULL) { 1571 break; 1572 } 1573#if MEMORY_LOGGING 1574 fl->ifl_m_enqueued++; 1575#endif 1576 1577 DBG_COUNTER_INC(rx_allocs); 1578#ifdef notyet 1579 if ((rxsd->ifsd_flags & RX_SW_DESC_MAP_CREATED) == 0) { 1580 int err; 1581 1582 if ((err = bus_dmamap_create(fl->ifl_ifdi->idi_tag, 0, &rxsd->ifsd_map))) { 1583 log(LOG_WARNING, "bus_dmamap_create failed %d\n", err); 1584 uma_zfree(fl->ifl_zone, cl); 1585 n = 0; 1586 goto done; 1587 } 1588 rxsd->ifsd_flags |= RX_SW_DESC_MAP_CREATED; 1589 } 1590#endif 1591#if defined(__i386__) || defined(__amd64__) 1592 if (!IS_DMAR(ctx)) { 1593 bus_addr = pmap_kextract((vm_offset_t)cl); 1594 } else 1595#endif 1596 { 1597 struct rxq_refill_cb_arg cb_arg; 1598 iflib_rxq_t q; 1599 1600 cb_arg.error = 0; 1601 q = fl->ifl_rxq; 1602 err = bus_dmamap_load(fl->ifl_desc_tag, rxsd->ifsd_map, 1603 cl, fl->ifl_buf_size, _rxq_refill_cb, &cb_arg, 0); 1604 1605 if (err != 0 || cb_arg.error) { 1606 /* 1607 * !zone_pack ? 1608 */ 1609 if (fl->ifl_zone == zone_pack) 1610 uma_zfree(fl->ifl_zone, cl); 1611 m_free(m); 1612 n = 0; 1613 goto done; 1614 } 1615 bus_addr = cb_arg.seg.ds_addr; 1616 } 1617 rxsd->ifsd_flags |= RX_SW_DESC_INUSE; 1618 1619 MPASS(rxsd->ifsd_m == NULL); 1620 rxsd->ifsd_cl = cl; 1621 rxsd->ifsd_m = m; 1622 fl->ifl_bus_addrs[i] = bus_addr; 1623 fl->ifl_vm_addrs[i] = cl; 1624 rxsd++; 1625 fl->ifl_credits++; 1626 i++; 1627 MPASS(fl->ifl_credits <= fl->ifl_size); 1628 if (++fl->ifl_pidx == fl->ifl_size) { 1629 fl->ifl_pidx = 0; 1630 fl->ifl_gen = 1; 1631 rxsd = fl->ifl_sds; 1632 } 1633 if (n == 0 || i == IFLIB_MAX_RX_REFRESH) { 1634 ctx->isc_rxd_refill(ctx->ifc_softc, fl->ifl_rxq->ifr_id, fl->ifl_id, pidx, 1635 fl->ifl_bus_addrs, fl->ifl_vm_addrs, i, fl->ifl_buf_size); 1636 i = 0; 1637 pidx = fl->ifl_pidx; 1638 } 1639 } 1640done: 1641 DBG_COUNTER_INC(rxd_flush); 1642 if (fl->ifl_pidx == 0) 1643 pidx = fl->ifl_size - 1; 1644 else 1645 pidx = fl->ifl_pidx - 1; 1646 ctx->isc_rxd_flush(ctx->ifc_softc, fl->ifl_rxq->ifr_id, fl->ifl_id, pidx); 1647} 1648 1649static __inline void 1650__iflib_fl_refill_lt(if_ctx_t ctx, iflib_fl_t fl, int max) 1651{ 1652 /* we avoid allowing pidx to catch up with cidx as it confuses ixl */ 1653 int32_t reclaimable = fl->ifl_size - fl->ifl_credits - 1; 1654#ifdef INVARIANTS 1655 int32_t delta = fl->ifl_size - get_inuse(fl->ifl_size, fl->ifl_cidx, fl->ifl_pidx, fl->ifl_gen) - 1; 1656#endif 1657 1658 MPASS(fl->ifl_credits <= fl->ifl_size); 1659 MPASS(reclaimable == delta); 1660 1661 if (reclaimable > 0) 1662 _iflib_fl_refill(ctx, fl, min(max, reclaimable)); 1663} 1664 1665static void 1666iflib_fl_bufs_free(iflib_fl_t fl) 1667{ 1668 iflib_dma_info_t idi = fl->ifl_ifdi; 1669 uint32_t i; 1670 1671 for (i = 0; i < fl->ifl_size; i++) { 1672 iflib_rxsd_t d = &fl->ifl_sds[i]; 1673 1674 if (d->ifsd_flags & RX_SW_DESC_INUSE) { 1675 bus_dmamap_unload(fl->ifl_desc_tag, d->ifsd_map); 1676 bus_dmamap_destroy(fl->ifl_desc_tag, d->ifsd_map); 1677 if (d->ifsd_m != NULL) { 1678 m_init(d->ifsd_m, M_NOWAIT, MT_DATA, 0); 1679 uma_zfree(zone_mbuf, d->ifsd_m); 1680 } 1681 if (d->ifsd_cl != NULL) 1682 uma_zfree(fl->ifl_zone, d->ifsd_cl); 1683 d->ifsd_flags = 0; 1684 } else { 1685 MPASS(d->ifsd_cl == NULL); 1686 MPASS(d->ifsd_m == NULL); 1687 } 1688#if MEMORY_LOGGING 1689 fl->ifl_m_dequeued++; 1690 fl->ifl_cl_dequeued++; 1691#endif 1692 d->ifsd_cl = NULL; 1693 d->ifsd_m = NULL; 1694 } 1695 /* 1696 * Reset free list values 1697 */ 1698 fl->ifl_credits = fl->ifl_cidx = fl->ifl_pidx = fl->ifl_gen = 0;; 1699 bzero(idi->idi_vaddr, idi->idi_size); 1700} 1701 1702/********************************************************************* 1703 * 1704 * Initialize a receive ring and its buffers. 1705 * 1706 **********************************************************************/ 1707static int 1708iflib_fl_setup(iflib_fl_t fl) 1709{ 1710 iflib_rxq_t rxq = fl->ifl_rxq; 1711 if_ctx_t ctx = rxq->ifr_ctx; 1712 if_softc_ctx_t sctx = &ctx->ifc_softc_ctx; 1713 1714 /* 1715 ** Free current RX buffer structs and their mbufs 1716 */ 1717 iflib_fl_bufs_free(fl); 1718 /* Now replenish the mbufs */ 1719 MPASS(fl->ifl_credits == 0); 1720 /* 1721 * XXX don't set the max_frame_size to larger 1722 * than the hardware can handle 1723 */ 1724 if (sctx->isc_max_frame_size <= 2048) 1725 fl->ifl_buf_size = MCLBYTES; 1726 else if (sctx->isc_max_frame_size <= 4096) 1727 fl->ifl_buf_size = MJUMPAGESIZE; 1728 else if (sctx->isc_max_frame_size <= 9216) 1729 fl->ifl_buf_size = MJUM9BYTES; 1730 else 1731 fl->ifl_buf_size = MJUM16BYTES; 1732 if (fl->ifl_buf_size > ctx->ifc_max_fl_buf_size) 1733 ctx->ifc_max_fl_buf_size = fl->ifl_buf_size; 1734 fl->ifl_cltype = m_gettype(fl->ifl_buf_size); 1735 fl->ifl_zone = m_getzone(fl->ifl_buf_size); 1736 1737 1738 /* avoid pre-allocating zillions of clusters to an idle card 1739 * potentially speeding up attach 1740 */ 1741 _iflib_fl_refill(ctx, fl, min(128, fl->ifl_size)); 1742 MPASS(min(128, fl->ifl_size) == fl->ifl_credits); 1743 if (min(128, fl->ifl_size) != fl->ifl_credits) 1744 return (ENOBUFS); 1745 /* 1746 * handle failure 1747 */ 1748 MPASS(rxq != NULL); 1749 MPASS(fl->ifl_ifdi != NULL); 1750 bus_dmamap_sync(fl->ifl_ifdi->idi_tag, fl->ifl_ifdi->idi_map, 1751 BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); 1752 return (0); 1753} 1754 1755/********************************************************************* 1756 * 1757 * Free receive ring data structures 1758 * 1759 **********************************************************************/ 1760static void 1761iflib_rx_sds_free(iflib_rxq_t rxq) 1762{ 1763 iflib_fl_t fl; 1764 int i; 1765 1766 if (rxq->ifr_fl != NULL) { 1767 for (i = 0; i < rxq->ifr_nfl; i++) { 1768 fl = &rxq->ifr_fl[i]; 1769 if (fl->ifl_desc_tag != NULL) { 1770 bus_dma_tag_destroy(fl->ifl_desc_tag); 1771 fl->ifl_desc_tag = NULL; 1772 } 1773 } 1774 if (rxq->ifr_fl->ifl_sds != NULL) 1775 free(rxq->ifr_fl->ifl_sds, M_IFLIB); 1776 1777 free(rxq->ifr_fl, M_IFLIB); 1778 rxq->ifr_fl = NULL; 1779 rxq->ifr_cq_gen = rxq->ifr_cq_cidx = rxq->ifr_cq_pidx = 0; 1780 } 1781} 1782 1783/* 1784 * MI independent logic 1785 * 1786 */ 1787static void 1788iflib_timer(void *arg) 1789{ 1790 iflib_txq_t txq = arg; 1791 if_ctx_t ctx = txq->ift_ctx; 1792 if_softc_ctx_t scctx = &ctx->ifc_softc_ctx; 1793 1794 if (!(if_getdrvflags(ctx->ifc_ifp) & IFF_DRV_RUNNING)) 1795 return; 1796 /* 1797 ** Check on the state of the TX queue(s), this 1798 ** can be done without the lock because its RO 1799 ** and the HUNG state will be static if set. 1800 */ 1801 IFDI_TIMER(ctx, txq->ift_id); 1802 if ((txq->ift_qstatus == IFLIB_QUEUE_HUNG) && 1803 (ctx->ifc_pause_frames == 0)) 1804 goto hung; 1805 1806 if (TXQ_AVAIL(txq) <= 2*scctx->isc_tx_nsegments || 1807 ifmp_ring_is_stalled(txq->ift_br[0])) 1808 GROUPTASK_ENQUEUE(&txq->ift_task); 1809 1810 ctx->ifc_pause_frames = 0; 1811 if (if_getdrvflags(ctx->ifc_ifp) & IFF_DRV_RUNNING) 1812 callout_reset_on(&txq->ift_timer, hz/2, iflib_timer, txq, txq->ift_timer.c_cpu); 1813 return; 1814hung: 1815 CTX_LOCK(ctx); 1816 if_setdrvflagbits(ctx->ifc_ifp, 0, IFF_DRV_RUNNING); 1817 device_printf(ctx->ifc_dev, "TX(%d) desc avail = %d, pidx = %d\n", 1818 txq->ift_id, TXQ_AVAIL(txq), txq->ift_pidx); 1819 1820 IFDI_WATCHDOG_RESET(ctx); 1821 ctx->ifc_watchdog_events++; 1822 ctx->ifc_pause_frames = 0; 1823 1824 iflib_init_locked(ctx); 1825 CTX_UNLOCK(ctx); 1826} 1827 1828static void 1829iflib_init_locked(if_ctx_t ctx) 1830{ 1831 if_softc_ctx_t sctx = &ctx->ifc_softc_ctx; 1832 if_t ifp = ctx->ifc_ifp; 1833 iflib_fl_t fl; 1834 iflib_txq_t txq; 1835 iflib_rxq_t rxq; 1836 int i, j; 1837 1838 1839 if_setdrvflagbits(ifp, IFF_DRV_OACTIVE, IFF_DRV_RUNNING); 1840 IFDI_INTR_DISABLE(ctx); 1841 1842 /* Set hardware offload abilities */ 1843 if_clearhwassist(ifp); 1844 if (if_getcapenable(ifp) & IFCAP_TXCSUM) 1845 if_sethwassistbits(ifp, CSUM_IP | CSUM_TCP | CSUM_UDP, 0); 1846 if (if_getcapenable(ifp) & IFCAP_TXCSUM_IPV6) 1847 if_sethwassistbits(ifp, (CSUM_TCP_IPV6 | CSUM_UDP_IPV6), 0); 1848 if (if_getcapenable(ifp) & IFCAP_TSO4) 1849 if_sethwassistbits(ifp, CSUM_IP_TSO, 0); 1850 if (if_getcapenable(ifp) & IFCAP_TSO6) 1851 if_sethwassistbits(ifp, CSUM_IP6_TSO, 0); 1852 1853 for (i = 0, txq = ctx->ifc_txqs; i < sctx->isc_ntxqsets; i++, txq++) { 1854 CALLOUT_LOCK(txq); 1855 callout_stop(&txq->ift_timer); 1856 callout_stop(&txq->ift_db_check); 1857 CALLOUT_UNLOCK(txq); 1858 iflib_netmap_txq_init(ctx, txq); 1859 } 1860 for (i = 0, rxq = ctx->ifc_rxqs; i < sctx->isc_nrxqsets; i++, rxq++) { 1861 iflib_netmap_rxq_init(ctx, rxq); 1862 } 1863#ifdef INVARIANTS 1864 i = if_getdrvflags(ifp); 1865#endif 1866 IFDI_INIT(ctx); 1867 MPASS(if_getdrvflags(ifp) == i); 1868 for (i = 0, rxq = ctx->ifc_rxqs; i < sctx->isc_nrxqsets; i++, rxq++) { 1869 for (j = 0, fl = rxq->ifr_fl; j < rxq->ifr_nfl; j++, fl++) { 1870 if (iflib_fl_setup(fl)) { 1871 device_printf(ctx->ifc_dev, "freelist setup failed - check cluster settings\n"); 1872 goto done; 1873 } 1874 } 1875 } 1876 done: 1877 if_setdrvflagbits(ctx->ifc_ifp, IFF_DRV_RUNNING, IFF_DRV_OACTIVE); 1878 IFDI_INTR_ENABLE(ctx); 1879 txq = ctx->ifc_txqs; 1880 for (i = 0; i < sctx->isc_ntxqsets; i++, txq++) 1881 callout_reset_on(&txq->ift_timer, hz/2, iflib_timer, txq, 1882 txq->ift_timer.c_cpu); 1883} 1884 1885static int 1886iflib_media_change(if_t ifp) 1887{ 1888 if_ctx_t ctx = if_getsoftc(ifp); 1889 int err; 1890 1891 CTX_LOCK(ctx); 1892 if ((err = IFDI_MEDIA_CHANGE(ctx)) == 0) 1893 iflib_init_locked(ctx); 1894 CTX_UNLOCK(ctx); 1895 return (err); 1896} 1897 1898static void 1899iflib_media_status(if_t ifp, struct ifmediareq *ifmr) 1900{ 1901 if_ctx_t ctx = if_getsoftc(ifp); 1902 1903 CTX_LOCK(ctx); 1904 IFDI_UPDATE_ADMIN_STATUS(ctx); 1905 IFDI_MEDIA_STATUS(ctx, ifmr); 1906 CTX_UNLOCK(ctx); 1907} 1908 1909static void 1910iflib_stop(if_ctx_t ctx) 1911{ 1912 iflib_txq_t txq = ctx->ifc_txqs; 1913 iflib_rxq_t rxq = ctx->ifc_rxqs; 1914 if_softc_ctx_t scctx = &ctx->ifc_softc_ctx; 1915 iflib_dma_info_t di; 1916 iflib_fl_t fl; 1917 int i, j; 1918 1919 /* Tell the stack that the interface is no longer active */ 1920 if_setdrvflagbits(ctx->ifc_ifp, IFF_DRV_OACTIVE, IFF_DRV_RUNNING); 1921 1922 IFDI_INTR_DISABLE(ctx); 1923 msleep(ctx, &ctx->ifc_mtx, PUSER, "iflib_init", hz); 1924 1925 /* Wait for current tx queue users to exit to disarm watchdog timer. */ 1926 for (i = 0; i < scctx->isc_ntxqsets; i++, txq++) { 1927 /* make sure all transmitters have completed before proceeding XXX */ 1928 1929 /* clean any enqueued buffers */ 1930 iflib_txq_check_drain(txq, 0); 1931 /* Free any existing tx buffers. */ 1932 for (j = 0; j < txq->ift_size; j++) { 1933 iflib_txsd_free(ctx, txq, j); 1934 } 1935 txq->ift_processed = txq->ift_cleaned = txq->ift_cidx_processed = 0; 1936 txq->ift_in_use = txq->ift_cidx = txq->ift_pidx = txq->ift_no_desc_avail = 0; 1937 txq->ift_closed = txq->ift_mbuf_defrag = txq->ift_mbuf_defrag_failed = 0; 1938 txq->ift_no_tx_dma_setup = txq->ift_txd_encap_efbig = txq->ift_map_failed = 0; 1939 txq->ift_pullups = 0; 1940 ifmp_ring_reset_stats(txq->ift_br[0]); 1941 for (j = 0, di = txq->ift_ifdi; j < ctx->ifc_nhwtxqs; j++, di++) 1942 bzero((void *)di->idi_vaddr, di->idi_size); 1943 } 1944 for (i = 0; i < scctx->isc_nrxqsets; i++, rxq++) { 1945 /* make sure all transmitters have completed before proceeding XXX */ 1946 1947 for (j = 0, di = txq->ift_ifdi; j < ctx->ifc_nhwrxqs; j++, di++) 1948 bzero((void *)di->idi_vaddr, di->idi_size); 1949 /* also resets the free lists pidx/cidx */ 1950 for (j = 0, fl = rxq->ifr_fl; j < rxq->ifr_nfl; j++, fl++) 1951 iflib_fl_bufs_free(fl); 1952 } 1953 IFDI_STOP(ctx); 1954} 1955 1956static iflib_rxsd_t 1957rxd_frag_to_sd(iflib_rxq_t rxq, if_rxd_frag_t irf, int *cltype, int unload) 1958{ 1959 int flid, cidx; 1960 iflib_rxsd_t sd; 1961 iflib_fl_t fl; 1962 iflib_dma_info_t di; 1963 1964 flid = irf->irf_flid; 1965 cidx = irf->irf_idx; 1966 fl = &rxq->ifr_fl[flid]; 1967 fl->ifl_credits--; 1968#if MEMORY_LOGGING 1969 fl->ifl_m_dequeued++; 1970 if (cltype) 1971 fl->ifl_cl_dequeued++; 1972#endif 1973 sd = &fl->ifl_sds[cidx]; 1974 di = fl->ifl_ifdi; 1975 bus_dmamap_sync(di->idi_tag, di->idi_map, 1976 BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE); 1977 1978 /* not valid assert if bxe really does SGE from non-contiguous elements */ 1979 MPASS(fl->ifl_cidx == cidx); 1980 if (unload) 1981 bus_dmamap_unload(fl->ifl_desc_tag, sd->ifsd_map); 1982 1983 if (__predict_false(++fl->ifl_cidx == fl->ifl_size)) { 1984 fl->ifl_cidx = 0; 1985 fl->ifl_gen = 0; 1986 } 1987 /* YES ick */ 1988 if (cltype) 1989 *cltype = fl->ifl_cltype; 1990 return (sd); 1991} 1992 1993static struct mbuf * 1994assemble_segments(iflib_rxq_t rxq, if_rxd_info_t ri) 1995{ 1996 int i, padlen , flags, cltype; 1997 struct mbuf *m, *mh, *mt; 1998 iflib_rxsd_t sd; 1999 caddr_t cl; 2000 2001 i = 0; 2002 mh = NULL; 2003 do { 2004 sd = rxd_frag_to_sd(rxq, &ri->iri_frags[i], &cltype, TRUE); 2005 2006 MPASS(sd->ifsd_cl != NULL); 2007 MPASS(sd->ifsd_m != NULL); 2008 2009 /* Don't include zero-length frags */ 2010 if (ri->iri_frags[i].irf_len == 0) { 2011 /* XXX we can save the cluster here, but not the mbuf */ 2012 m_init(sd->ifsd_m, M_NOWAIT, MT_DATA, 0); 2013 m_free(sd->ifsd_m); 2014 sd->ifsd_m = NULL; 2015 continue; 2016 } 2017 2018 m = sd->ifsd_m; 2019 if (mh == NULL) { 2020 flags = M_PKTHDR|M_EXT; 2021 mh = mt = m; 2022 padlen = ri->iri_pad; 2023 } else { 2024 flags = M_EXT; 2025 mt->m_next = m; 2026 mt = m; 2027 /* assuming padding is only on the first fragment */ 2028 padlen = 0; 2029 } 2030 sd->ifsd_m = NULL; 2031 cl = sd->ifsd_cl; 2032 sd->ifsd_cl = NULL; 2033 2034 /* Can these two be made one ? */ 2035 m_init(m, M_NOWAIT, MT_DATA, flags); 2036 m_cljset(m, cl, cltype); 2037 /* 2038 * These must follow m_init and m_cljset 2039 */ 2040 m->m_data += padlen; 2041 ri->iri_len -= padlen; 2042 m->m_len = ri->iri_frags[i].irf_len; 2043 } while (++i < ri->iri_nfrags); 2044 2045 return (mh); 2046} 2047 2048/* 2049 * Process one software descriptor 2050 */ 2051static struct mbuf * 2052iflib_rxd_pkt_get(iflib_rxq_t rxq, if_rxd_info_t ri) 2053{ 2054 struct mbuf *m; 2055 iflib_rxsd_t sd; 2056 2057 /* should I merge this back in now that the two paths are basically duplicated? */ 2058 if (ri->iri_nfrags == 1 && 2059 ri->iri_frags[0].irf_len <= MIN(IFLIB_RX_COPY_THRESH, MHLEN)) { 2060 sd = rxd_frag_to_sd(rxq, &ri->iri_frags[0], NULL, FALSE); 2061 m = sd->ifsd_m; 2062 sd->ifsd_m = NULL; 2063 m_init(m, M_NOWAIT, MT_DATA, M_PKTHDR); 2064 memcpy(m->m_data, sd->ifsd_cl, ri->iri_len); 2065 m->m_len = ri->iri_frags[0].irf_len; 2066 } else { 2067 m = assemble_segments(rxq, ri); 2068 } 2069 m->m_pkthdr.len = ri->iri_len; 2070 m->m_pkthdr.rcvif = ri->iri_ifp; 2071 m->m_flags |= ri->iri_flags; 2072 m->m_pkthdr.ether_vtag = ri->iri_vtag; 2073 m->m_pkthdr.flowid = ri->iri_flowid; 2074 M_HASHTYPE_SET(m, ri->iri_rsstype); 2075 m->m_pkthdr.csum_flags = ri->iri_csum_flags; 2076 m->m_pkthdr.csum_data = ri->iri_csum_data; 2077 return (m); 2078} 2079 2080static bool 2081iflib_rxeof(iflib_rxq_t rxq, int budget) 2082{ 2083 if_ctx_t ctx = rxq->ifr_ctx; 2084 if_shared_ctx_t sctx = ctx->ifc_sctx; 2085 if_softc_ctx_t scctx = &ctx->ifc_softc_ctx; 2086 int avail, i; 2087 uint16_t *cidxp; 2088 struct if_rxd_info ri; 2089 int err, budget_left, rx_bytes, rx_pkts; 2090 iflib_fl_t fl; 2091 struct ifnet *ifp; 2092 int lro_enabled; 2093 /* 2094 * XXX early demux data packets so that if_input processing only handles 2095 * acks in interrupt context 2096 */ 2097 struct mbuf *m, *mh, *mt; 2098 2099 if (netmap_rx_irq(ctx->ifc_ifp, rxq->ifr_id, &budget)) { 2100 return (FALSE); 2101 } 2102 2103 mh = mt = NULL; 2104 MPASS(budget > 0); 2105 rx_pkts = rx_bytes = 0; 2106 if (sctx->isc_flags & IFLIB_HAS_RXCQ) 2107 cidxp = &rxq->ifr_cq_cidx; 2108 else 2109 cidxp = &rxq->ifr_fl[0].ifl_cidx; 2110 if ((avail = iflib_rxd_avail(ctx, rxq, *cidxp, budget)) == 0) { 2111 for (i = 0, fl = &rxq->ifr_fl[0]; i < sctx->isc_nfl; i++, fl++) 2112 __iflib_fl_refill_lt(ctx, fl, budget + 8); 2113 DBG_COUNTER_INC(rx_unavail); 2114 return (false); 2115 } 2116 2117 for (budget_left = budget; (budget_left > 0) && (avail > 0); budget_left--, avail--) { 2118 if (__predict_false(!CTX_ACTIVE(ctx))) { 2119 DBG_COUNTER_INC(rx_ctx_inactive); 2120 break; 2121 } 2122 /* 2123 * Reset client set fields to their default values 2124 */ 2125 bzero(&ri, sizeof(ri)); 2126 ri.iri_qsidx = rxq->ifr_id; 2127 ri.iri_cidx = *cidxp; 2128 ri.iri_ifp = ctx->ifc_ifp; 2129 ri.iri_frags = rxq->ifr_frags; 2130 err = ctx->isc_rxd_pkt_get(ctx->ifc_softc, &ri); 2131 2132 /* in lieu of handling correctly - make sure it isn't being unhandled */ 2133 MPASS(err == 0); 2134 if (sctx->isc_flags & IFLIB_HAS_RXCQ) { 2135 *cidxp = ri.iri_cidx; 2136 /* Update our consumer index */ 2137 while (rxq->ifr_cq_cidx >= scctx->isc_nrxd[0]) { 2138 rxq->ifr_cq_cidx -= scctx->isc_nrxd[0]; 2139 rxq->ifr_cq_gen = 0; 2140 } 2141 /* was this only a completion queue message? */ 2142 if (__predict_false(ri.iri_nfrags == 0)) 2143 continue; 2144 } 2145 MPASS(ri.iri_nfrags != 0); 2146 MPASS(ri.iri_len != 0); 2147 2148 /* will advance the cidx on the corresponding free lists */ 2149 m = iflib_rxd_pkt_get(rxq, &ri); 2150 if (avail == 0 && budget_left) 2151 avail = iflib_rxd_avail(ctx, rxq, *cidxp, budget_left); 2152 2153 if (__predict_false(m == NULL)) { 2154 DBG_COUNTER_INC(rx_mbuf_null); 2155 continue; 2156 } 2157 /* imm_pkt: -- cxgb */ 2158 if (mh == NULL) 2159 mh = mt = m; 2160 else { 2161 mt->m_nextpkt = m; 2162 mt = m; 2163 } 2164 } 2165 /* make sure that we can refill faster than drain */ 2166 for (i = 0, fl = &rxq->ifr_fl[0]; i < sctx->isc_nfl; i++, fl++) 2167 __iflib_fl_refill_lt(ctx, fl, budget + 8); 2168 2169 ifp = ctx->ifc_ifp; 2170 lro_enabled = (if_getcapenable(ifp) & IFCAP_LRO); 2171 while (mh != NULL) { 2172 m = mh; 2173 mh = mh->m_nextpkt; 2174 m->m_nextpkt = NULL; 2175 rx_bytes += m->m_pkthdr.len; 2176 rx_pkts++; 2177#if defined(INET6) || defined(INET) 2178 if (lro_enabled && tcp_lro_rx(&rxq->ifr_lc, m, 0) == 0) 2179 continue; 2180#endif 2181 DBG_COUNTER_INC(rx_if_input); 2182 ifp->if_input(ifp, m); 2183 } 2184 2185 if_inc_counter(ifp, IFCOUNTER_IBYTES, rx_bytes); 2186 if_inc_counter(ifp, IFCOUNTER_IPACKETS, rx_pkts); 2187 2188 /* 2189 * Flush any outstanding LRO work 2190 */ 2191#if defined(INET6) || defined(INET) 2192 tcp_lro_flush_all(&rxq->ifr_lc); 2193#endif 2194 if (avail) 2195 return true; 2196 return (iflib_rxd_avail(ctx, rxq, *cidxp, 1)); 2197} 2198 2199#define M_CSUM_FLAGS(m) ((m)->m_pkthdr.csum_flags) 2200#define M_HAS_VLANTAG(m) (m->m_flags & M_VLANTAG) 2201#define TXQ_MAX_DB_DEFERRED(size) (size >> 5) 2202#define TXQ_MAX_DB_CONSUMED(size) (size >> 4) 2203 2204static __inline void 2205iflib_txd_db_check(if_ctx_t ctx, iflib_txq_t txq, int ring) 2206{ 2207 uint32_t dbval; 2208 2209 if (ring || txq->ift_db_pending >= 2210 TXQ_MAX_DB_DEFERRED(txq->ift_size)) { 2211 2212 /* the lock will only ever be contended in the !min_latency case */ 2213 if (!TXDB_TRYLOCK(txq)) 2214 return; 2215 dbval = txq->ift_npending ? txq->ift_npending : txq->ift_pidx; 2216 ctx->isc_txd_flush(ctx->ifc_softc, txq->ift_id, dbval); 2217 txq->ift_db_pending = txq->ift_npending = 0; 2218 TXDB_UNLOCK(txq); 2219 } 2220} 2221 2222static void 2223iflib_txd_deferred_db_check(void * arg) 2224{ 2225 iflib_txq_t txq = arg; 2226 2227 /* simple non-zero boolean so use bitwise OR */ 2228 if ((txq->ift_db_pending | txq->ift_npending) && 2229 txq->ift_db_pending >= txq->ift_db_pending_queued) 2230 iflib_txd_db_check(txq->ift_ctx, txq, TRUE); 2231 txq->ift_db_pending_queued = 0; 2232 if (ifmp_ring_is_stalled(txq->ift_br[0])) 2233 iflib_txq_check_drain(txq, 4); 2234} 2235 2236#ifdef PKT_DEBUG 2237static void 2238print_pkt(if_pkt_info_t pi) 2239{ 2240 printf("pi len: %d qsidx: %d nsegs: %d ndescs: %d flags: %x pidx: %d\n", 2241 pi->ipi_len, pi->ipi_qsidx, pi->ipi_nsegs, pi->ipi_ndescs, pi->ipi_flags, pi->ipi_pidx); 2242 printf("pi new_pidx: %d csum_flags: %lx tso_segsz: %d mflags: %x vtag: %d\n", 2243 pi->ipi_new_pidx, pi->ipi_csum_flags, pi->ipi_tso_segsz, pi->ipi_mflags, pi->ipi_vtag); 2244 printf("pi etype: %d ehdrlen: %d ip_hlen: %d ipproto: %d\n", 2245 pi->ipi_etype, pi->ipi_ehdrlen, pi->ipi_ip_hlen, pi->ipi_ipproto); 2246} 2247#endif 2248 2249#define IS_TSO4(pi) ((pi)->ipi_csum_flags & CSUM_IP_TSO) 2250#define IS_TSO6(pi) ((pi)->ipi_csum_flags & CSUM_IP6_TSO) 2251 2252static int 2253iflib_parse_header(iflib_txq_t txq, if_pkt_info_t pi, struct mbuf **mp) 2254{ 2255 struct ether_vlan_header *eh; 2256 struct mbuf *m, *n; 2257 2258 n = m = *mp; 2259 /* 2260 * Determine where frame payload starts. 2261 * Jump over vlan headers if already present, 2262 * helpful for QinQ too. 2263 */ 2264 if (__predict_false(m->m_len < sizeof(*eh))) { 2265 txq->ift_pullups++; 2266 if (__predict_false((m = m_pullup(m, sizeof(*eh))) == NULL)) 2267 return (ENOMEM); 2268 } 2269 eh = mtod(m, struct ether_vlan_header *); 2270 if (eh->evl_encap_proto == htons(ETHERTYPE_VLAN)) { 2271 pi->ipi_etype = ntohs(eh->evl_proto); 2272 pi->ipi_ehdrlen = ETHER_HDR_LEN + ETHER_VLAN_ENCAP_LEN; 2273 } else { 2274 pi->ipi_etype = ntohs(eh->evl_encap_proto); 2275 pi->ipi_ehdrlen = ETHER_HDR_LEN; 2276 } 2277 2278 switch (pi->ipi_etype) { 2279#ifdef INET 2280 case ETHERTYPE_IP: 2281 { 2282 struct ip *ip = NULL; 2283 struct tcphdr *th = NULL; 2284 int minthlen; 2285 2286 minthlen = min(m->m_pkthdr.len, pi->ipi_ehdrlen + sizeof(*ip) + sizeof(*th)); 2287 if (__predict_false(m->m_len < minthlen)) { 2288 /* 2289 * if this code bloat is causing too much of a hit 2290 * move it to a separate function and mark it noinline 2291 */ 2292 if (m->m_len == pi->ipi_ehdrlen) { 2293 n = m->m_next; 2294 MPASS(n); 2295 if (n->m_len >= sizeof(*ip)) { 2296 ip = (struct ip *)n->m_data; 2297 if (n->m_len >= (ip->ip_hl << 2) + sizeof(*th)) 2298 th = (struct tcphdr *)((caddr_t)ip + (ip->ip_hl << 2)); 2299 } else { 2300 txq->ift_pullups++; 2301 if (__predict_false((m = m_pullup(m, minthlen)) == NULL)) 2302 return (ENOMEM); 2303 ip = (struct ip *)(m->m_data + pi->ipi_ehdrlen); 2304 } 2305 } else { 2306 txq->ift_pullups++; 2307 if (__predict_false((m = m_pullup(m, minthlen)) == NULL)) 2308 return (ENOMEM); 2309 ip = (struct ip *)(m->m_data + pi->ipi_ehdrlen); 2310 if (m->m_len >= (ip->ip_hl << 2) + sizeof(*th)) 2311 th = (struct tcphdr *)((caddr_t)ip + (ip->ip_hl << 2)); 2312 } 2313 } else { 2314 ip = (struct ip *)(m->m_data + pi->ipi_ehdrlen); 2315 if (m->m_len >= (ip->ip_hl << 2) + sizeof(*th)) 2316 th = (struct tcphdr *)((caddr_t)ip + (ip->ip_hl << 2)); 2317 } 2318 pi->ipi_ip_hlen = ip->ip_hl << 2; 2319 pi->ipi_ipproto = ip->ip_p; 2320 pi->ipi_flags |= IPI_TX_IPV4; 2321 2322 if (pi->ipi_csum_flags & CSUM_IP) 2323 ip->ip_sum = 0; 2324 2325 if (pi->ipi_ipproto == IPPROTO_TCP) { 2326 if (__predict_false(th == NULL)) { 2327 txq->ift_pullups++; 2328 if (__predict_false((m = m_pullup(m, (ip->ip_hl << 2) + sizeof(*th))) == NULL)) 2329 return (ENOMEM); 2330 th = (struct tcphdr *)((caddr_t)ip + pi->ipi_ip_hlen); 2331 } 2332 pi->ipi_tcp_hflags = th->th_flags; 2333 pi->ipi_tcp_hlen = th->th_off << 2; 2334 pi->ipi_tcp_seq = th->th_seq; 2335 } 2336 if (IS_TSO4(pi)) { 2337 if (__predict_false(ip->ip_p != IPPROTO_TCP)) 2338 return (ENXIO); 2339 th->th_sum = in_pseudo(ip->ip_src.s_addr, 2340 ip->ip_dst.s_addr, htons(IPPROTO_TCP)); 2341 pi->ipi_tso_segsz = m->m_pkthdr.tso_segsz; 2342 } 2343 break; 2344 } 2345#endif 2346#ifdef INET6 2347 case ETHERTYPE_IPV6: 2348 { 2349 struct ip6_hdr *ip6 = (struct ip6_hdr *)(m->m_data + pi->ipi_ehdrlen); 2350 struct tcphdr *th; 2351 pi->ipi_ip_hlen = sizeof(struct ip6_hdr); 2352 2353 if (__predict_false(m->m_len < pi->ipi_ehdrlen + sizeof(struct ip6_hdr))) { 2354 if (__predict_false((m = m_pullup(m, pi->ipi_ehdrlen + sizeof(struct ip6_hdr))) == NULL)) 2355 return (ENOMEM); 2356 } 2357 th = (struct tcphdr *)((caddr_t)ip6 + pi->ipi_ip_hlen); 2358 2359 /* XXX-BZ this will go badly in case of ext hdrs. */ 2360 pi->ipi_ipproto = ip6->ip6_nxt; 2361 pi->ipi_flags |= IPI_TX_IPV6; 2362 2363 if (pi->ipi_ipproto == IPPROTO_TCP) { 2364 if (__predict_false(m->m_len < pi->ipi_ehdrlen + sizeof(struct ip6_hdr) + sizeof(struct tcphdr))) { 2365 if (__predict_false((m = m_pullup(m, pi->ipi_ehdrlen + sizeof(struct ip6_hdr) + sizeof(struct tcphdr))) == NULL)) 2366 return (ENOMEM); 2367 } 2368 pi->ipi_tcp_hflags = th->th_flags; 2369 pi->ipi_tcp_hlen = th->th_off << 2; 2370 } 2371 if (IS_TSO6(pi)) { 2372 2373 if (__predict_false(ip6->ip6_nxt != IPPROTO_TCP)) 2374 return (ENXIO); 2375 /* 2376 * The corresponding flag is set by the stack in the IPv4 2377 * TSO case, but not in IPv6 (at least in FreeBSD 10.2). 2378 * So, set it here because the rest of the flow requires it. 2379 */ 2380 pi->ipi_csum_flags |= CSUM_TCP_IPV6; 2381 th->th_sum = in6_cksum_pseudo(ip6, 0, IPPROTO_TCP, 0); 2382 pi->ipi_tso_segsz = m->m_pkthdr.tso_segsz; 2383 } 2384 break; 2385 } 2386#endif 2387 default: 2388 pi->ipi_csum_flags &= ~CSUM_OFFLOAD; 2389 pi->ipi_ip_hlen = 0; 2390 break; 2391 } 2392 *mp = m; 2393 return (0); 2394} 2395 2396 2397static __noinline struct mbuf * 2398collapse_pkthdr(struct mbuf *m0) 2399{ 2400 struct mbuf *m, *m_next, *tmp; 2401 2402 m = m0; 2403 m_next = m->m_next; 2404 while (m_next != NULL && m_next->m_len == 0) { 2405 m = m_next; 2406 m->m_next = NULL; 2407 m_free(m); 2408 m_next = m_next->m_next; 2409 } 2410 m = m0; 2411 m->m_next = m_next; 2412 if ((m_next->m_flags & M_EXT) == 0) { 2413 m = m_defrag(m, M_NOWAIT); 2414 } else { 2415 tmp = m_next->m_next; 2416 memcpy(m_next, m, MPKTHSIZE); 2417 m = m_next; 2418 m->m_next = tmp; 2419 } 2420 return (m); 2421} 2422 2423/* 2424 * If dodgy hardware rejects the scatter gather chain we've handed it 2425 * we'll need to remove the mbuf chain from ifsg_m[] before we can add the 2426 * m_defrag'd mbufs 2427 */ 2428static __noinline struct mbuf * 2429iflib_remove_mbuf(iflib_txq_t txq) 2430{ 2431 int ntxd, i, pidx; 2432 struct mbuf *m, *mh, **ifsd_m; 2433 2434 pidx = txq->ift_pidx; 2435 ifsd_m = txq->ift_sds.ifsd_m; 2436 ntxd = txq->ift_size; 2437 mh = m = ifsd_m[pidx]; 2438 ifsd_m[pidx] = NULL; 2439#if MEMORY_LOGGING 2440 txq->ift_dequeued++; 2441#endif 2442 i = 1; 2443 2444 while (m) { 2445 ifsd_m[(pidx + i) & (ntxd -1)] = NULL; 2446#if MEMORY_LOGGING 2447 txq->ift_dequeued++; 2448#endif 2449 m = m->m_next; 2450 i++; 2451 } 2452 return (mh); 2453} 2454 2455static int 2456iflib_busdma_load_mbuf_sg(iflib_txq_t txq, bus_dma_tag_t tag, bus_dmamap_t map, 2457 struct mbuf **m0, bus_dma_segment_t *segs, int *nsegs, 2458 int max_segs, int flags) 2459{ 2460 if_ctx_t ctx; 2461 if_shared_ctx_t sctx; 2462 if_softc_ctx_t scctx; 2463 int i, next, pidx, mask, err, maxsegsz, ntxd, count; 2464 struct mbuf *m, *tmp, **ifsd_m, **mp; 2465 2466 m = *m0; 2467 2468 /* 2469 * Please don't ever do this 2470 */ 2471 if (__predict_false(m->m_len == 0)) 2472 *m0 = m = collapse_pkthdr(m); 2473 2474 ctx = txq->ift_ctx; 2475 sctx = ctx->ifc_sctx; 2476 scctx = &ctx->ifc_softc_ctx; 2477 ifsd_m = txq->ift_sds.ifsd_m; 2478 ntxd = txq->ift_size; 2479 pidx = txq->ift_pidx; 2480 if (map != NULL) { 2481 uint8_t *ifsd_flags = txq->ift_sds.ifsd_flags; 2482 2483 err = bus_dmamap_load_mbuf_sg(tag, map, 2484 *m0, segs, nsegs, BUS_DMA_NOWAIT); 2485 if (err) 2486 return (err); 2487 ifsd_flags[pidx] |= TX_SW_DESC_MAPPED; 2488 i = 0; 2489 next = pidx; 2490 mask = (txq->ift_size-1); 2491 m = *m0; 2492 do { 2493 mp = &ifsd_m[next]; 2494 *mp = m; 2495 m = m->m_next; 2496 if (__predict_false((*mp)->m_len == 0)) { 2497 m_free(*mp); 2498 *mp = NULL; 2499 } else 2500 next = (pidx + i) & (ntxd-1); 2501 } while (m != NULL); 2502 } else { 2503 int buflen, sgsize, max_sgsize; 2504 vm_offset_t vaddr; 2505 vm_paddr_t curaddr; 2506 2507 count = i = 0; 2508 maxsegsz = sctx->isc_tx_maxsize; 2509 m = *m0; 2510 do { 2511 if (__predict_false(m->m_len <= 0)) { 2512 tmp = m; 2513 m = m->m_next; 2514 tmp->m_next = NULL; 2515 m_free(tmp); 2516 continue; 2517 } 2518 buflen = m->m_len; 2519 vaddr = (vm_offset_t)m->m_data; 2520 /* 2521 * see if we can't be smarter about physically 2522 * contiguous mappings 2523 */ 2524 next = (pidx + count) & (ntxd-1); 2525 MPASS(ifsd_m[next] == NULL); 2526#if MEMORY_LOGGING 2527 txq->ift_enqueued++; 2528#endif 2529 ifsd_m[next] = m; 2530 while (buflen > 0) { 2531 max_sgsize = MIN(buflen, maxsegsz); 2532 curaddr = pmap_kextract(vaddr); 2533 sgsize = PAGE_SIZE - (curaddr & PAGE_MASK); 2534 sgsize = MIN(sgsize, max_sgsize); 2535 segs[i].ds_addr = curaddr; 2536 segs[i].ds_len = sgsize; 2537 vaddr += sgsize; 2538 buflen -= sgsize; 2539 i++; 2540 if (i >= max_segs) 2541 goto err; 2542 } 2543 count++; 2544 tmp = m; 2545 m = m->m_next; 2546 } while (m != NULL); 2547 *nsegs = i; 2548 } 2549 return (0); 2550err: 2551 *m0 = iflib_remove_mbuf(txq); 2552 return (EFBIG); 2553} 2554 2555static int 2556iflib_encap(iflib_txq_t txq, struct mbuf **m_headp) 2557{ 2558 if_ctx_t ctx; 2559 if_shared_ctx_t sctx; 2560 if_softc_ctx_t scctx; 2561 bus_dma_segment_t *segs; 2562 struct mbuf *m_head; 2563 bus_dmamap_t map; 2564 struct if_pkt_info pi; 2565 int remap = 0; 2566 int err, nsegs, ndesc, max_segs, pidx, cidx, next, ntxd; 2567 bus_dma_tag_t desc_tag; 2568 2569 segs = txq->ift_segs; 2570 ctx = txq->ift_ctx; 2571 sctx = ctx->ifc_sctx; 2572 scctx = &ctx->ifc_softc_ctx; 2573 segs = txq->ift_segs; 2574 ntxd = txq->ift_size; 2575 m_head = *m_headp; 2576 map = NULL; 2577 2578 /* 2579 * If we're doing TSO the next descriptor to clean may be quite far ahead 2580 */ 2581 cidx = txq->ift_cidx; 2582 pidx = txq->ift_pidx; 2583 next = (cidx + CACHE_PTR_INCREMENT) & (ntxd-1); 2584 2585 /* prefetch the next cache line of mbuf pointers and flags */ 2586 prefetch(&txq->ift_sds.ifsd_m[next]); 2587 if (txq->ift_sds.ifsd_map != NULL) { 2588 prefetch(&txq->ift_sds.ifsd_map[next]); 2589 map = txq->ift_sds.ifsd_map[pidx]; 2590 next = (cidx + CACHE_LINE_SIZE) & (ntxd-1); 2591 prefetch(&txq->ift_sds.ifsd_flags[next]); 2592 } 2593 2594 2595 if (m_head->m_pkthdr.csum_flags & CSUM_TSO) { 2596 desc_tag = txq->ift_tso_desc_tag; 2597 max_segs = scctx->isc_tx_tso_segments_max; 2598 } else { 2599 desc_tag = txq->ift_desc_tag; 2600 max_segs = scctx->isc_tx_nsegments; 2601 } 2602 m_head = *m_headp; 2603 bzero(&pi, sizeof(pi)); 2604 pi.ipi_len = m_head->m_pkthdr.len; 2605 pi.ipi_mflags = (m_head->m_flags & (M_VLANTAG|M_BCAST|M_MCAST)); 2606 pi.ipi_csum_flags = m_head->m_pkthdr.csum_flags; 2607 pi.ipi_vtag = (m_head->m_flags & M_VLANTAG) ? m_head->m_pkthdr.ether_vtag : 0; 2608 pi.ipi_pidx = pidx; 2609 pi.ipi_qsidx = txq->ift_id; 2610 2611 /* deliberate bitwise OR to make one condition */ 2612 if (__predict_true((pi.ipi_csum_flags | pi.ipi_vtag))) { 2613 if (__predict_false((err = iflib_parse_header(txq, &pi, m_headp)) != 0)) 2614 return (err); 2615 m_head = *m_headp; 2616 } 2617 2618retry: 2619 err = iflib_busdma_load_mbuf_sg(txq, desc_tag, map, m_headp, segs, &nsegs, max_segs, BUS_DMA_NOWAIT); 2620defrag: 2621 if (__predict_false(err)) { 2622 switch (err) { 2623 case EFBIG: 2624 /* try collapse once and defrag once */ 2625 if (remap == 0) 2626 m_head = m_collapse(*m_headp, M_NOWAIT, max_segs); 2627 if (remap == 1) 2628 m_head = m_defrag(*m_headp, M_NOWAIT); 2629 remap++; 2630 if (__predict_false(m_head == NULL)) 2631 goto defrag_failed; 2632 txq->ift_mbuf_defrag++; 2633 *m_headp = m_head; 2634 goto retry; 2635 break; 2636 case ENOMEM: 2637 txq->ift_no_tx_dma_setup++; 2638 break; 2639 default: 2640 txq->ift_no_tx_dma_setup++; 2641 m_freem(*m_headp); 2642 DBG_COUNTER_INC(tx_frees); 2643 *m_headp = NULL; 2644 break; 2645 } 2646 txq->ift_map_failed++; 2647 DBG_COUNTER_INC(encap_load_mbuf_fail); 2648 return (err); 2649 } 2650 2651 /* 2652 * XXX assumes a 1 to 1 relationship between segments and 2653 * descriptors - this does not hold true on all drivers, e.g. 2654 * cxgb 2655 */ 2656 if (__predict_false(nsegs + 2 > TXQ_AVAIL(txq))) { 2657 txq->ift_no_desc_avail++; 2658 if (map != NULL) 2659 bus_dmamap_unload(desc_tag, map); 2660 DBG_COUNTER_INC(encap_txq_avail_fail); 2661 if ((txq->ift_task.gt_task.ta_flags & TASK_ENQUEUED) == 0) 2662 GROUPTASK_ENQUEUE(&txq->ift_task); 2663 return (ENOBUFS); 2664 } 2665 pi.ipi_segs = segs; 2666 pi.ipi_nsegs = nsegs; 2667 2668 MPASS(pidx >= 0 && pidx < txq->ift_size); 2669#ifdef PKT_DEBUG 2670 print_pkt(&pi); 2671#endif 2672 if ((err = ctx->isc_txd_encap(ctx->ifc_softc, &pi)) == 0) { 2673 bus_dmamap_sync(txq->ift_ifdi->idi_tag, txq->ift_ifdi->idi_map, 2674 BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); 2675 2676 DBG_COUNTER_INC(tx_encap); 2677 MPASS(pi.ipi_new_pidx >= 0 && 2678 pi.ipi_new_pidx < txq->ift_size); 2679 2680 ndesc = pi.ipi_new_pidx - pi.ipi_pidx; 2681 if (pi.ipi_new_pidx < pi.ipi_pidx) { 2682 ndesc += txq->ift_size; 2683 txq->ift_gen = 1; 2684 } 2685 MPASS(pi.ipi_new_pidx != pidx); 2686 MPASS(ndesc > 0); 2687 txq->ift_in_use += ndesc; 2688 /* 2689 * We update the last software descriptor again here because there may 2690 * be a sentinel and/or there may be more mbufs than segments 2691 */ 2692 txq->ift_pidx = pi.ipi_new_pidx; 2693 txq->ift_npending += pi.ipi_ndescs; 2694 } else if (__predict_false(err == EFBIG && remap < 2)) { 2695 *m_headp = m_head = iflib_remove_mbuf(txq); 2696 remap = 1; 2697 txq->ift_txd_encap_efbig++; 2698 goto defrag; 2699 } else 2700 DBG_COUNTER_INC(encap_txd_encap_fail); 2701 return (err); 2702 2703defrag_failed: 2704 txq->ift_mbuf_defrag_failed++; 2705 txq->ift_map_failed++; 2706 m_freem(*m_headp); 2707 DBG_COUNTER_INC(tx_frees); 2708 *m_headp = NULL; 2709 return (ENOMEM); 2710} 2711 2712/* forward compatibility for cxgb */ 2713#define FIRST_QSET(ctx) 0 2714 2715#define NTXQSETS(ctx) ((ctx)->ifc_softc_ctx.isc_ntxqsets) 2716#define NRXQSETS(ctx) ((ctx)->ifc_softc_ctx.isc_nrxqsets) 2717#define QIDX(ctx, m) ((((m)->m_pkthdr.flowid & ctx->ifc_softc_ctx.isc_rss_table_mask) % NTXQSETS(ctx)) + FIRST_QSET(ctx)) 2718#define DESC_RECLAIMABLE(q) ((int)((q)->ift_processed - (q)->ift_cleaned - (q)->ift_ctx->ifc_softc_ctx.isc_tx_nsegments)) 2719#define RECLAIM_THRESH(ctx) ((ctx)->ifc_sctx->isc_tx_reclaim_thresh) 2720#define MAX_TX_DESC(ctx) ((ctx)->ifc_softc_ctx.isc_tx_tso_segments_max) 2721 2722 2723 2724/* if there are more than TXQ_MIN_OCCUPANCY packets pending we consider deferring 2725 * doorbell writes 2726 * 2727 * ORing with 2 assures that min occupancy is never less than 2 without any conditional logic 2728 */ 2729#define TXQ_MIN_OCCUPANCY(size) ((size >> 6)| 0x2) 2730 2731static inline int 2732iflib_txq_min_occupancy(iflib_txq_t txq) 2733{ 2734 if_ctx_t ctx; 2735 2736 ctx = txq->ift_ctx; 2737 return (get_inuse(txq->ift_size, txq->ift_cidx, txq->ift_pidx, 2738 txq->ift_gen) < TXQ_MIN_OCCUPANCY(txq->ift_size) + 2739 MAX_TX_DESC(ctx)); 2740} 2741 2742static void 2743iflib_tx_desc_free(iflib_txq_t txq, int n) 2744{ 2745 int hasmap; 2746 uint32_t qsize, cidx, mask, gen; 2747 struct mbuf *m, **ifsd_m; 2748 uint8_t *ifsd_flags; 2749 bus_dmamap_t *ifsd_map; 2750 2751 cidx = txq->ift_cidx; 2752 gen = txq->ift_gen; 2753 qsize = txq->ift_size; 2754 mask = qsize-1; 2755 hasmap = txq->ift_sds.ifsd_map != NULL; 2756 ifsd_flags = txq->ift_sds.ifsd_flags; 2757 ifsd_m = txq->ift_sds.ifsd_m; 2758 ifsd_map = txq->ift_sds.ifsd_map; 2759 2760 while (n--) { 2761 prefetch(ifsd_m[(cidx + 3) & mask]); 2762 prefetch(ifsd_m[(cidx + 4) & mask]); 2763 2764 if (ifsd_m[cidx] != NULL) { 2765 prefetch(&ifsd_m[(cidx + CACHE_PTR_INCREMENT) & mask]); 2766 prefetch(&ifsd_flags[(cidx + CACHE_PTR_INCREMENT) & mask]); 2767 if (hasmap && (ifsd_flags[cidx] & TX_SW_DESC_MAPPED)) { 2768 /* 2769 * does it matter if it's not the TSO tag? If so we'll 2770 * have to add the type to flags 2771 */ 2772 bus_dmamap_unload(txq->ift_desc_tag, ifsd_map[cidx]); 2773 ifsd_flags[cidx] &= ~TX_SW_DESC_MAPPED; 2774 } 2775 if ((m = ifsd_m[cidx]) != NULL) { 2776 /* XXX we don't support any drivers that batch packets yet */ 2777 MPASS(m->m_nextpkt == NULL); 2778 2779 m_free(m); 2780 ifsd_m[cidx] = NULL; 2781#if MEMORY_LOGGING 2782 txq->ift_dequeued++; 2783#endif 2784 DBG_COUNTER_INC(tx_frees); 2785 } 2786 } 2787 if (__predict_false(++cidx == qsize)) { 2788 cidx = 0; 2789 gen = 0; 2790 } 2791 } 2792 txq->ift_cidx = cidx; 2793 txq->ift_gen = gen; 2794} 2795 2796static __inline int 2797iflib_completed_tx_reclaim(iflib_txq_t txq, int thresh) 2798{ 2799 int reclaim; 2800 if_ctx_t ctx = txq->ift_ctx; 2801 2802 KASSERT(thresh >= 0, ("invalid threshold to reclaim")); 2803 MPASS(thresh /*+ MAX_TX_DESC(txq->ift_ctx) */ < txq->ift_size); 2804 2805 /* 2806 * Need a rate-limiting check so that this isn't called every time 2807 */ 2808 iflib_tx_credits_update(ctx, txq); 2809 reclaim = DESC_RECLAIMABLE(txq); 2810 2811 if (reclaim <= thresh /* + MAX_TX_DESC(txq->ift_ctx) */) { 2812#ifdef INVARIANTS 2813 if (iflib_verbose_debug) { 2814 printf("%s processed=%ju cleaned=%ju tx_nsegments=%d reclaim=%d thresh=%d\n", __FUNCTION__, 2815 txq->ift_processed, txq->ift_cleaned, txq->ift_ctx->ifc_softc_ctx.isc_tx_nsegments, 2816 reclaim, thresh); 2817 2818 } 2819#endif 2820 return (0); 2821 } 2822 iflib_tx_desc_free(txq, reclaim); 2823 txq->ift_cleaned += reclaim; 2824 txq->ift_in_use -= reclaim; 2825 2826 if (txq->ift_active == FALSE) 2827 txq->ift_active = TRUE; 2828 2829 return (reclaim); 2830} 2831 2832static struct mbuf ** 2833_ring_peek_one(struct ifmp_ring *r, int cidx, int offset) 2834{ 2835 2836 return (__DEVOLATILE(struct mbuf **, &r->items[(cidx + offset) & (r->size-1)])); 2837} 2838 2839static void 2840iflib_txq_check_drain(iflib_txq_t txq, int budget) 2841{ 2842 2843 ifmp_ring_check_drainage(txq->ift_br[0], budget); 2844} 2845 2846static uint32_t 2847iflib_txq_can_drain(struct ifmp_ring *r) 2848{ 2849 iflib_txq_t txq = r->cookie; 2850 if_ctx_t ctx = txq->ift_ctx; 2851 2852 return ((TXQ_AVAIL(txq) >= MAX_TX_DESC(ctx)) || 2853 ctx->isc_txd_credits_update(ctx->ifc_softc, txq->ift_id, txq->ift_cidx_processed, false)); 2854} 2855 2856static uint32_t 2857iflib_txq_drain(struct ifmp_ring *r, uint32_t cidx, uint32_t pidx) 2858{ 2859 iflib_txq_t txq = r->cookie; 2860 if_ctx_t ctx = txq->ift_ctx; 2861 if_t ifp = ctx->ifc_ifp; 2862 struct mbuf **mp, *m; 2863 int i, count, consumed, pkt_sent, bytes_sent, mcast_sent, avail, err, in_use_prev, desc_used; 2864 2865 if (__predict_false(!(if_getdrvflags(ifp) & IFF_DRV_RUNNING) || 2866 !LINK_ACTIVE(ctx))) { 2867 DBG_COUNTER_INC(txq_drain_notready); 2868 return (0); 2869 } 2870 2871 avail = IDXDIFF(pidx, cidx, r->size); 2872 if (__predict_false(ctx->ifc_flags & IFC_QFLUSH)) { 2873 DBG_COUNTER_INC(txq_drain_flushing); 2874 for (i = 0; i < avail; i++) { 2875 m_free(r->items[(cidx + i) & (r->size-1)]); 2876 r->items[(cidx + i) & (r->size-1)] = NULL; 2877 } 2878 return (avail); 2879 } 2880 iflib_completed_tx_reclaim(txq, RECLAIM_THRESH(ctx)); 2881 if (__predict_false(if_getdrvflags(ctx->ifc_ifp) & IFF_DRV_OACTIVE)) { 2882 txq->ift_qstatus = IFLIB_QUEUE_IDLE; 2883 CALLOUT_LOCK(txq); 2884 callout_stop(&txq->ift_timer); 2885 callout_stop(&txq->ift_db_check); 2886 CALLOUT_UNLOCK(txq); 2887 DBG_COUNTER_INC(txq_drain_oactive); 2888 return (0); 2889 } 2890 consumed = mcast_sent = bytes_sent = pkt_sent = 0; 2891 count = MIN(avail, TX_BATCH_SIZE); 2892 2893 for (desc_used = i = 0; i < count && TXQ_AVAIL(txq) > MAX_TX_DESC(ctx) + 2; i++) { 2894 mp = _ring_peek_one(r, cidx, i); 2895 in_use_prev = txq->ift_in_use; 2896 err = iflib_encap(txq, mp); 2897 /* 2898 * What other errors should we bail out for? 2899 */ 2900 if (err == ENOBUFS) { 2901 DBG_COUNTER_INC(txq_drain_encapfail); 2902 break; 2903 } 2904 consumed++; 2905 if (err) 2906 continue; 2907 2908 pkt_sent++; 2909 m = *mp; 2910 DBG_COUNTER_INC(tx_sent); 2911 bytes_sent += m->m_pkthdr.len; 2912 if (m->m_flags & M_MCAST) 2913 mcast_sent++; 2914 2915 txq->ift_db_pending += (txq->ift_in_use - in_use_prev); 2916 desc_used += (txq->ift_in_use - in_use_prev); 2917 iflib_txd_db_check(ctx, txq, FALSE); 2918 ETHER_BPF_MTAP(ifp, m); 2919 if (__predict_false(!(if_getdrvflags(ctx->ifc_ifp) & IFF_DRV_RUNNING))) 2920 break; 2921 2922 if (desc_used > TXQ_MAX_DB_CONSUMED(txq->ift_size)) 2923 break; 2924 } 2925 2926 if ((iflib_min_tx_latency || iflib_txq_min_occupancy(txq)) && txq->ift_db_pending) 2927 iflib_txd_db_check(ctx, txq, TRUE); 2928 else if ((txq->ift_db_pending || TXQ_AVAIL(txq) < MAX_TX_DESC(ctx)) && 2929 (callout_pending(&txq->ift_db_check) == 0)) { 2930 txq->ift_db_pending_queued = txq->ift_db_pending; 2931 callout_reset_on(&txq->ift_db_check, 1, iflib_txd_deferred_db_check, 2932 txq, txq->ift_db_check.c_cpu); 2933 } 2934 if_inc_counter(ifp, IFCOUNTER_OBYTES, bytes_sent); 2935 if_inc_counter(ifp, IFCOUNTER_OPACKETS, pkt_sent); 2936 if (mcast_sent) 2937 if_inc_counter(ifp, IFCOUNTER_OMCASTS, mcast_sent); 2938 2939 return (consumed); 2940} 2941 2942static void 2943_task_fn_tx(void *context) 2944{ 2945 iflib_txq_t txq = context; 2946 if_ctx_t ctx = txq->ift_ctx; 2947 2948 if (!(if_getdrvflags(ctx->ifc_ifp) & IFF_DRV_RUNNING)) 2949 return; 2950 ifmp_ring_check_drainage(txq->ift_br[0], TX_BATCH_SIZE); 2951} 2952 2953static void 2954_task_fn_rx(void *context) 2955{ 2956 iflib_rxq_t rxq = context; 2957 if_ctx_t ctx = rxq->ifr_ctx; 2958 bool more; 2959 int rc; 2960 2961 DBG_COUNTER_INC(task_fn_rxs); 2962 if (__predict_false(!(if_getdrvflags(ctx->ifc_ifp) & IFF_DRV_RUNNING))) 2963 return; 2964 2965 if ((more = iflib_rxeof(rxq, 16 /* XXX */)) == false) { 2966 if (ctx->ifc_flags & IFC_LEGACY) 2967 IFDI_INTR_ENABLE(ctx); 2968 else { 2969 DBG_COUNTER_INC(rx_intr_enables); 2970 rc = IFDI_QUEUE_INTR_ENABLE(ctx, rxq->ifr_id); 2971 KASSERT(rc != ENOTSUP, ("MSI-X support requires queue_intr_enable, but not implemented in driver")); 2972 } 2973 } 2974 if (__predict_false(!(if_getdrvflags(ctx->ifc_ifp) & IFF_DRV_RUNNING))) 2975 return; 2976 if (more) 2977 GROUPTASK_ENQUEUE(&rxq->ifr_task); 2978} 2979 2980static void 2981_task_fn_admin(void *context) 2982{ 2983 if_ctx_t ctx = context; 2984 if_softc_ctx_t sctx = &ctx->ifc_softc_ctx; 2985 iflib_txq_t txq; 2986 int i; 2987 2988 if (!(if_getdrvflags(ctx->ifc_ifp) & IFF_DRV_RUNNING)) 2989 return; 2990 2991 CTX_LOCK(ctx); 2992 for (txq = ctx->ifc_txqs, i = 0; i < sctx->isc_ntxqsets; i++, txq++) { 2993 CALLOUT_LOCK(txq); 2994 callout_stop(&txq->ift_timer); 2995 CALLOUT_UNLOCK(txq); 2996 } 2997 IFDI_UPDATE_ADMIN_STATUS(ctx); 2998 for (txq = ctx->ifc_txqs, i = 0; i < sctx->isc_ntxqsets; i++, txq++) 2999 callout_reset_on(&txq->ift_timer, hz/2, iflib_timer, txq, txq->ift_timer.c_cpu); 3000 IFDI_LINK_INTR_ENABLE(ctx); 3001 CTX_UNLOCK(ctx); 3002 3003 if (LINK_ACTIVE(ctx) == 0) 3004 return; 3005 for (txq = ctx->ifc_txqs, i = 0; i < sctx->isc_ntxqsets; i++, txq++) 3006 iflib_txq_check_drain(txq, IFLIB_RESTART_BUDGET); 3007} 3008 3009 3010static void 3011_task_fn_iov(void *context) 3012{ 3013 if_ctx_t ctx = context; 3014 3015 if (!(if_getdrvflags(ctx->ifc_ifp) & IFF_DRV_RUNNING)) 3016 return; 3017 3018 CTX_LOCK(ctx); 3019 IFDI_VFLR_HANDLE(ctx); 3020 CTX_UNLOCK(ctx); 3021} 3022 3023static int 3024iflib_sysctl_int_delay(SYSCTL_HANDLER_ARGS) 3025{ 3026 int err; 3027 if_int_delay_info_t info; 3028 if_ctx_t ctx; 3029 3030 info = (if_int_delay_info_t)arg1; 3031 ctx = info->iidi_ctx; 3032 info->iidi_req = req; 3033 info->iidi_oidp = oidp; 3034 CTX_LOCK(ctx); 3035 err = IFDI_SYSCTL_INT_DELAY(ctx, info); 3036 CTX_UNLOCK(ctx); 3037 return (err); 3038} 3039 3040/********************************************************************* 3041 * 3042 * IFNET FUNCTIONS 3043 * 3044 **********************************************************************/ 3045 3046static void 3047iflib_if_init_locked(if_ctx_t ctx) 3048{ 3049 iflib_stop(ctx); 3050 iflib_init_locked(ctx); 3051} 3052 3053 3054static void 3055iflib_if_init(void *arg) 3056{ 3057 if_ctx_t ctx = arg; 3058 3059 CTX_LOCK(ctx); 3060 iflib_if_init_locked(ctx); 3061 CTX_UNLOCK(ctx); 3062} 3063 3064static int 3065iflib_if_transmit(if_t ifp, struct mbuf *m) 3066{ 3067 if_ctx_t ctx = if_getsoftc(ifp); 3068 3069 iflib_txq_t txq; 3070 int err, qidx; 3071 3072 if (__predict_false((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0 || !LINK_ACTIVE(ctx))) { 3073 DBG_COUNTER_INC(tx_frees); 3074 m_freem(m); 3075 return (0); 3076 } 3077 3078 MPASS(m->m_nextpkt == NULL); 3079 qidx = 0; 3080 if ((NTXQSETS(ctx) > 1) && M_HASHTYPE_GET(m)) 3081 qidx = QIDX(ctx, m); 3082 /* 3083 * XXX calculate buf_ring based on flowid (divvy up bits?) 3084 */ 3085 txq = &ctx->ifc_txqs[qidx]; 3086 3087#ifdef DRIVER_BACKPRESSURE 3088 if (txq->ift_closed) { 3089 while (m != NULL) { 3090 next = m->m_nextpkt; 3091 m->m_nextpkt = NULL; 3092 m_freem(m); 3093 m = next; 3094 } 3095 return (ENOBUFS); 3096 } 3097#endif 3098#ifdef notyet 3099 qidx = count = 0; 3100 mp = marr; 3101 next = m; 3102 do { 3103 count++; 3104 next = next->m_nextpkt; 3105 } while (next != NULL); 3106 3107 if (count > nitems(marr)) 3108 if ((mp = malloc(count*sizeof(struct mbuf *), M_IFLIB, M_NOWAIT)) == NULL) { 3109 /* XXX check nextpkt */ 3110 m_freem(m); 3111 /* XXX simplify for now */ 3112 DBG_COUNTER_INC(tx_frees); 3113 return (ENOBUFS); 3114 } 3115 for (next = m, i = 0; next != NULL; i++) { 3116 mp[i] = next; 3117 next = next->m_nextpkt; 3118 mp[i]->m_nextpkt = NULL; 3119 } 3120#endif 3121 DBG_COUNTER_INC(tx_seen); 3122 err = ifmp_ring_enqueue(txq->ift_br[0], (void **)&m, 1, TX_BATCH_SIZE); 3123 3124 if (err) { 3125 GROUPTASK_ENQUEUE(&txq->ift_task); 3126 /* support forthcoming later */ 3127#ifdef DRIVER_BACKPRESSURE 3128 txq->ift_closed = TRUE; 3129#endif 3130 ifmp_ring_check_drainage(txq->ift_br[0], TX_BATCH_SIZE); 3131 m_freem(m); 3132 } else if (TXQ_AVAIL(txq) < (txq->ift_size >> 1)) { 3133 GROUPTASK_ENQUEUE(&txq->ift_task); 3134 } 3135 3136 return (err); 3137} 3138 3139static void 3140iflib_if_qflush(if_t ifp) 3141{ 3142 if_ctx_t ctx = if_getsoftc(ifp); 3143 iflib_txq_t txq = ctx->ifc_txqs; 3144 int i; 3145 3146 CTX_LOCK(ctx); 3147 ctx->ifc_flags |= IFC_QFLUSH; 3148 CTX_UNLOCK(ctx); 3149 for (i = 0; i < NTXQSETS(ctx); i++, txq++) 3150 while (!(ifmp_ring_is_idle(txq->ift_br[0]) || ifmp_ring_is_stalled(txq->ift_br[0]))) 3151 iflib_txq_check_drain(txq, 0); 3152 CTX_LOCK(ctx); 3153 ctx->ifc_flags &= ~IFC_QFLUSH; 3154 CTX_UNLOCK(ctx); 3155 3156 if_qflush(ifp); 3157} 3158 3159 3160#define IFCAP_FLAGS (IFCAP_TXCSUM_IPV6 | IFCAP_RXCSUM_IPV6 | IFCAP_HWCSUM | IFCAP_LRO | \ 3161 IFCAP_TSO4 | IFCAP_TSO6 | IFCAP_VLAN_HWTAGGING | \ 3162 IFCAP_VLAN_MTU | IFCAP_VLAN_HWFILTER | IFCAP_VLAN_HWTSO) 3163 3164#define IFCAP_REINIT IFCAP_FLAGS 3165 3166static int 3167iflib_if_ioctl(if_t ifp, u_long command, caddr_t data) 3168{ 3169 if_ctx_t ctx = if_getsoftc(ifp); 3170 struct ifreq *ifr = (struct ifreq *)data; 3171#if defined(INET) || defined(INET6) 3172 struct ifaddr *ifa = (struct ifaddr *)data; 3173#endif 3174 bool avoid_reset = FALSE; 3175 int err = 0, reinit = 0, bits; 3176 3177 switch (command) { 3178 case SIOCSIFADDR: 3179#ifdef INET 3180 if (ifa->ifa_addr->sa_family == AF_INET) 3181 avoid_reset = TRUE; 3182#endif 3183#ifdef INET6 3184 if (ifa->ifa_addr->sa_family == AF_INET6) 3185 avoid_reset = TRUE; 3186#endif 3187 /* 3188 ** Calling init results in link renegotiation, 3189 ** so we avoid doing it when possible. 3190 */ 3191 if (avoid_reset) { 3192 if_setflagbits(ifp, IFF_UP,0); 3193 if (!(if_getdrvflags(ifp)& IFF_DRV_RUNNING)) 3194 reinit = 1; 3195#ifdef INET 3196 if (!(if_getflags(ifp) & IFF_NOARP)) 3197 arp_ifinit(ifp, ifa); 3198#endif 3199 } else 3200 err = ether_ioctl(ifp, command, data); 3201 break; 3202 case SIOCSIFMTU: 3203 CTX_LOCK(ctx); 3204 if (ifr->ifr_mtu == if_getmtu(ifp)) { 3205 CTX_UNLOCK(ctx); 3206 break; 3207 } 3208 bits = if_getdrvflags(ifp); 3209 /* stop the driver and free any clusters before proceeding */ 3210 iflib_stop(ctx); 3211 3212 if ((err = IFDI_MTU_SET(ctx, ifr->ifr_mtu)) == 0) { 3213 if (ifr->ifr_mtu > ctx->ifc_max_fl_buf_size) 3214 ctx->ifc_flags |= IFC_MULTISEG; 3215 else 3216 ctx->ifc_flags &= ~IFC_MULTISEG; 3217 err = if_setmtu(ifp, ifr->ifr_mtu); 3218 } 3219 iflib_init_locked(ctx); 3220 if_setdrvflags(ifp, bits); 3221 CTX_UNLOCK(ctx); 3222 break; 3223 case SIOCSIFFLAGS: 3224 CTX_LOCK(ctx); 3225 if (if_getflags(ifp) & IFF_UP) { 3226 if (if_getdrvflags(ifp) & IFF_DRV_RUNNING) { 3227 if ((if_getflags(ifp) ^ ctx->ifc_if_flags) & 3228 (IFF_PROMISC | IFF_ALLMULTI)) { 3229 err = IFDI_PROMISC_SET(ctx, if_getflags(ifp)); 3230 } 3231 } else 3232 reinit = 1; 3233 } else if (if_getdrvflags(ifp) & IFF_DRV_RUNNING) { 3234 iflib_stop(ctx); 3235 } 3236 ctx->ifc_if_flags = if_getflags(ifp); 3237 CTX_UNLOCK(ctx); 3238 break; 3239 3240 break; 3241 case SIOCADDMULTI: 3242 case SIOCDELMULTI: 3243 if (if_getdrvflags(ifp) & IFF_DRV_RUNNING) { 3244 CTX_LOCK(ctx); 3245 IFDI_INTR_DISABLE(ctx); 3246 IFDI_MULTI_SET(ctx); 3247 IFDI_INTR_ENABLE(ctx); 3248 CTX_UNLOCK(ctx); 3249 } 3250 break; 3251 case SIOCSIFMEDIA: 3252 CTX_LOCK(ctx); 3253 IFDI_MEDIA_SET(ctx); 3254 CTX_UNLOCK(ctx); 3255 /* falls thru */ 3256 case SIOCGIFMEDIA: 3257 err = ifmedia_ioctl(ifp, ifr, &ctx->ifc_media, command); 3258 break; 3259 case SIOCGI2C: 3260 { 3261 struct ifi2creq i2c; 3262 3263 err = copyin(ifr_data_get_ptr(ifr), &i2c, sizeof(i2c)); 3264 if (err != 0) 3265 break; 3266 if (i2c.dev_addr != 0xA0 && i2c.dev_addr != 0xA2) { 3267 err = EINVAL; 3268 break; 3269 } 3270 if (i2c.len > sizeof(i2c.data)) { 3271 err = EINVAL; 3272 break; 3273 } 3274 3275 if ((err = IFDI_I2C_REQ(ctx, &i2c)) == 0) 3276 err = copyout(&i2c, ifr_data_get_ptr(ifr), 3277 sizeof(i2c)); 3278 break; 3279 } 3280 case SIOCSIFCAP: 3281 { 3282 int mask, setmask; 3283 3284 mask = ifr->ifr_reqcap ^ if_getcapenable(ifp); 3285 setmask = 0; 3286#ifdef TCP_OFFLOAD 3287 setmask |= mask & (IFCAP_TOE4|IFCAP_TOE6); 3288#endif 3289 setmask |= (mask & IFCAP_FLAGS); 3290 3291 if ((mask & IFCAP_WOL) && 3292 (if_getcapabilities(ifp) & IFCAP_WOL) != 0) 3293 setmask |= (mask & (IFCAP_WOL_MCAST|IFCAP_WOL_MAGIC)); 3294 if_vlancap(ifp); 3295 /* 3296 * want to ensure that traffic has stopped before we change any of the flags 3297 */ 3298 if (setmask) { 3299 CTX_LOCK(ctx); 3300 bits = if_getdrvflags(ifp); 3301 if (setmask & IFCAP_REINIT) 3302 iflib_stop(ctx); 3303 if_togglecapenable(ifp, setmask); 3304 if (setmask & IFCAP_REINIT) 3305 iflib_init_locked(ctx); 3306 if_setdrvflags(ifp, bits); 3307 CTX_UNLOCK(ctx); 3308 } 3309 break; 3310 } 3311 case SIOCGPRIVATE_0: 3312 case SIOCSDRVSPEC: 3313 case SIOCGDRVSPEC: 3314 CTX_LOCK(ctx); 3315 err = IFDI_PRIV_IOCTL(ctx, command, data); 3316 CTX_UNLOCK(ctx); 3317 break; 3318 default: 3319 err = ether_ioctl(ifp, command, data); 3320 break; 3321 } 3322 if (reinit) 3323 iflib_if_init(ctx); 3324 return (err); 3325} 3326 3327static uint64_t 3328iflib_if_get_counter(if_t ifp, ift_counter cnt) 3329{ 3330 if_ctx_t ctx = if_getsoftc(ifp); 3331 3332 return (IFDI_GET_COUNTER(ctx, cnt)); 3333} 3334 3335/********************************************************************* 3336 * 3337 * OTHER FUNCTIONS EXPORTED TO THE STACK 3338 * 3339 **********************************************************************/ 3340 3341static void 3342iflib_vlan_register(void *arg, if_t ifp, uint16_t vtag) 3343{ 3344 if_ctx_t ctx = if_getsoftc(ifp); 3345 3346 if ((void *)ctx != arg) 3347 return; 3348 3349 if ((vtag == 0) || (vtag > 4095)) 3350 return; 3351 3352 CTX_LOCK(ctx); 3353 IFDI_VLAN_REGISTER(ctx, vtag); 3354 /* Re-init to load the changes */ 3355 if (if_getcapenable(ifp) & IFCAP_VLAN_HWFILTER) 3356 iflib_init_locked(ctx); 3357 CTX_UNLOCK(ctx); 3358} 3359 3360static void 3361iflib_vlan_unregister(void *arg, if_t ifp, uint16_t vtag) 3362{ 3363 if_ctx_t ctx = if_getsoftc(ifp); 3364 3365 if ((void *)ctx != arg) 3366 return; 3367 3368 if ((vtag == 0) || (vtag > 4095)) 3369 return; 3370 3371 CTX_LOCK(ctx); 3372 IFDI_VLAN_UNREGISTER(ctx, vtag); 3373 /* Re-init to load the changes */ 3374 if (if_getcapenable(ifp) & IFCAP_VLAN_HWFILTER) 3375 iflib_init_locked(ctx); 3376 CTX_UNLOCK(ctx); 3377} 3378 3379static void 3380iflib_led_func(void *arg, int onoff) 3381{ 3382 if_ctx_t ctx = arg; 3383 3384 CTX_LOCK(ctx); 3385 IFDI_LED_FUNC(ctx, onoff); 3386 CTX_UNLOCK(ctx); 3387} 3388 3389/********************************************************************* 3390 * 3391 * BUS FUNCTION DEFINITIONS 3392 * 3393 **********************************************************************/ 3394 3395int 3396iflib_device_probe(device_t dev) 3397{ 3398 pci_vendor_info_t *ent; 3399 3400 uint16_t pci_vendor_id, pci_device_id; 3401 uint16_t pci_subvendor_id, pci_subdevice_id; 3402 uint16_t pci_rev_id; 3403 if_shared_ctx_t sctx; 3404 3405 if ((sctx = DEVICE_REGISTER(dev)) == NULL || sctx->isc_magic != IFLIB_MAGIC) 3406 return (ENOTSUP); 3407 3408 pci_vendor_id = pci_get_vendor(dev); 3409 pci_device_id = pci_get_device(dev); 3410 pci_subvendor_id = pci_get_subvendor(dev); 3411 pci_subdevice_id = pci_get_subdevice(dev); 3412 pci_rev_id = pci_get_revid(dev); 3413 if (sctx->isc_parse_devinfo != NULL) 3414 sctx->isc_parse_devinfo(&pci_device_id, &pci_subvendor_id, &pci_subdevice_id, &pci_rev_id); 3415 3416 ent = sctx->isc_vendor_info; 3417 while (ent->pvi_vendor_id != 0) { 3418 if (pci_vendor_id != ent->pvi_vendor_id) { 3419 ent++; 3420 continue; 3421 } 3422 if ((pci_device_id == ent->pvi_device_id) && 3423 ((pci_subvendor_id == ent->pvi_subvendor_id) || 3424 (ent->pvi_subvendor_id == 0)) && 3425 ((pci_subdevice_id == ent->pvi_subdevice_id) || 3426 (ent->pvi_subdevice_id == 0)) && 3427 ((pci_rev_id == ent->pvi_rev_id) || 3428 (ent->pvi_rev_id == 0))) { 3429 3430 device_set_desc_copy(dev, ent->pvi_name); 3431 /* this needs to be changed to zero if the bus probing code 3432 * ever stops re-probing on best match because the sctx 3433 * may have its values over written by register calls 3434 * in subsequent probes 3435 */ 3436 return (BUS_PROBE_DEFAULT); 3437 } 3438 ent++; 3439 } 3440 return (ENXIO); 3441} 3442 3443int 3444iflib_device_register(device_t dev, void *sc, if_shared_ctx_t sctx, if_ctx_t *ctxp) 3445{ 3446 int err, rid, msix, msix_bar; 3447 if_ctx_t ctx; 3448 if_t ifp; 3449 if_softc_ctx_t scctx; 3450 int i; 3451 uint16_t main_txq; 3452 uint16_t main_rxq; 3453 3454 3455 ctx = malloc(sizeof(* ctx), M_IFLIB, M_WAITOK|M_ZERO); 3456 3457 if (sc == NULL) { 3458 sc = malloc(sctx->isc_driver->size, M_IFLIB, M_WAITOK|M_ZERO); 3459 device_set_softc(dev, ctx); 3460 ctx->ifc_flags |= IFC_SC_ALLOCATED; 3461 } 3462 3463 ctx->ifc_sctx = sctx; 3464 ctx->ifc_dev = dev; 3465 ctx->ifc_txrx = *sctx->isc_txrx; 3466 ctx->ifc_softc = sc; 3467 3468 if ((err = iflib_register(ctx)) != 0) { 3469 device_printf(dev, "iflib_register failed %d\n", err); 3470 return (err); 3471 } 3472 iflib_add_device_sysctl_pre(ctx); 3473 3474 scctx = &ctx->ifc_softc_ctx; 3475 /* 3476 * XXX sanity check that ntxd & nrxd are a power of 2 3477 */ 3478 if (ctx->ifc_sysctl_ntxqs != 0) 3479 scctx->isc_ntxqsets = ctx->ifc_sysctl_ntxqs; 3480 if (ctx->ifc_sysctl_nrxqs != 0) 3481 scctx->isc_nrxqsets = ctx->ifc_sysctl_nrxqs; 3482 3483 for (i = 0; i < sctx->isc_ntxqs; i++) { 3484 if (ctx->ifc_sysctl_ntxds[i] != 0) 3485 scctx->isc_ntxd[i] = ctx->ifc_sysctl_ntxds[i]; 3486 else 3487 scctx->isc_ntxd[i] = sctx->isc_ntxd_default[i]; 3488 } 3489 3490 for (i = 0; i < sctx->isc_nrxqs; i++) { 3491 if (ctx->ifc_sysctl_nrxds[i] != 0) 3492 scctx->isc_nrxd[i] = ctx->ifc_sysctl_nrxds[i]; 3493 else 3494 scctx->isc_nrxd[i] = sctx->isc_nrxd_default[i]; 3495 } 3496 3497 for (i = 0; i < sctx->isc_nrxqs; i++) { 3498 if (scctx->isc_nrxd[i] < sctx->isc_nrxd_min[i]) { 3499 device_printf(dev, "nrxd%d: %d less than nrxd_min %d - resetting to min\n", 3500 i, scctx->isc_nrxd[i], sctx->isc_nrxd_min[i]); 3501 scctx->isc_nrxd[i] = sctx->isc_nrxd_min[i]; 3502 } 3503 if (scctx->isc_nrxd[i] > sctx->isc_nrxd_max[i]) { 3504 device_printf(dev, "nrxd%d: %d greater than nrxd_max %d - resetting to max\n", 3505 i, scctx->isc_nrxd[i], sctx->isc_nrxd_max[i]); 3506 scctx->isc_nrxd[i] = sctx->isc_nrxd_max[i]; 3507 } 3508 } 3509 3510 for (i = 0; i < sctx->isc_ntxqs; i++) { 3511 if (scctx->isc_ntxd[i] < sctx->isc_ntxd_min[i]) { 3512 device_printf(dev, "ntxd%d: %d less than ntxd_min %d - resetting to min\n", 3513 i, scctx->isc_ntxd[i], sctx->isc_ntxd_min[i]); 3514 scctx->isc_ntxd[i] = sctx->isc_ntxd_min[i]; 3515 } 3516 if (scctx->isc_ntxd[i] > sctx->isc_ntxd_max[i]) { 3517 device_printf(dev, "ntxd%d: %d greater than ntxd_max %d - resetting to max\n", 3518 i, scctx->isc_ntxd[i], sctx->isc_ntxd_max[i]); 3519 scctx->isc_ntxd[i] = sctx->isc_ntxd_max[i]; 3520 } 3521 } 3522 3523 if ((err = IFDI_ATTACH_PRE(ctx)) != 0) { 3524 device_printf(dev, "IFDI_ATTACH_PRE failed %d\n", err); 3525 return (err); 3526 } 3527 if (scctx->isc_ntxqsets_max) 3528 scctx->isc_ntxqsets = min(scctx->isc_ntxqsets, scctx->isc_ntxqsets_max); 3529 if (scctx->isc_nrxqsets_max) 3530 scctx->isc_nrxqsets = min(scctx->isc_nrxqsets, scctx->isc_nrxqsets_max); 3531 3532#ifdef ACPI_DMAR 3533 if (dmar_get_dma_tag(device_get_parent(dev), dev) != NULL) 3534 ctx->ifc_flags |= IFC_DMAR; 3535#endif 3536 3537 msix_bar = scctx->isc_msix_bar; 3538 3539 ifp = ctx->ifc_ifp; 3540 3541 if(sctx->isc_flags & IFLIB_HAS_TXCQ) 3542 main_txq = 1; 3543 else 3544 main_txq = 0; 3545 3546 if(sctx->isc_flags & IFLIB_HAS_RXCQ) 3547 main_rxq = 1; 3548 else 3549 main_rxq = 0; 3550 3551 /* XXX change for per-queue sizes */ 3552 device_printf(dev, "using %d tx descriptors and %d rx descriptors\n", 3553 scctx->isc_ntxd[main_txq], scctx->isc_nrxd[main_rxq]); 3554 for (i = 0; i < sctx->isc_nrxqs; i++) { 3555 if (!powerof2(scctx->isc_nrxd[i])) { 3556 /* round down instead? */ 3557 device_printf(dev, "# rx descriptors must be a power of 2\n"); 3558 err = EINVAL; 3559 goto fail; 3560 } 3561 } 3562 for (i = 0; i < sctx->isc_ntxqs; i++) { 3563 if (!powerof2(scctx->isc_ntxd[i])) { 3564 device_printf(dev, 3565 "# tx descriptors must be a power of 2"); 3566 err = EINVAL; 3567 goto fail; 3568 } 3569 } 3570 3571 if (scctx->isc_tx_nsegments > scctx->isc_ntxd[main_txq] / 3572 MAX_SINGLE_PACKET_FRACTION) 3573 scctx->isc_tx_nsegments = max(1, scctx->isc_ntxd[main_txq] / 3574 MAX_SINGLE_PACKET_FRACTION); 3575 if (scctx->isc_tx_tso_segments_max > scctx->isc_ntxd[main_txq] / 3576 MAX_SINGLE_PACKET_FRACTION) 3577 scctx->isc_tx_tso_segments_max = max(1, 3578 scctx->isc_ntxd[main_txq] / MAX_SINGLE_PACKET_FRACTION); 3579 3580 /* 3581 * Protect the stack against modern hardware 3582 */ 3583 if (scctx->isc_tx_tso_size_max > FREEBSD_TSO_SIZE_MAX) 3584 scctx->isc_tx_tso_size_max = FREEBSD_TSO_SIZE_MAX; 3585 3586 /* TSO parameters - dig these out of the data sheet - simply correspond to tag setup */ 3587 ifp->if_hw_tsomaxsegcount = scctx->isc_tx_tso_segments_max; 3588 ifp->if_hw_tsomax = scctx->isc_tx_tso_size_max; 3589 ifp->if_hw_tsomaxsegsize = scctx->isc_tx_tso_segsize_max; 3590 if (scctx->isc_rss_table_size == 0) 3591 scctx->isc_rss_table_size = 64; 3592 scctx->isc_rss_table_mask = scctx->isc_rss_table_size-1; 3593 /* 3594 ** Now setup MSI or MSI/X, should 3595 ** return us the number of supported 3596 ** vectors. (Will be 1 for MSI) 3597 */ 3598 if (sctx->isc_flags & IFLIB_SKIP_MSIX) { 3599 msix = scctx->isc_vectors; 3600 } else if (scctx->isc_msix_bar != 0) 3601 msix = iflib_msix_init(ctx); 3602 else { 3603 scctx->isc_vectors = 1; 3604 scctx->isc_ntxqsets = 1; 3605 scctx->isc_nrxqsets = 1; 3606 scctx->isc_intr = IFLIB_INTR_LEGACY; 3607 msix = 0; 3608 } 3609 /* Get memory for the station queues */ 3610 if ((err = iflib_queues_alloc(ctx))) { 3611 device_printf(dev, "Unable to allocate queue memory\n"); 3612 goto fail; 3613 } 3614 3615 if ((err = iflib_qset_structures_setup(ctx))) { 3616 device_printf(dev, "qset structure setup failed %d\n", err); 3617 goto fail_queues; 3618 } 3619 3620 if (msix > 1 && (err = IFDI_MSIX_INTR_ASSIGN(ctx, msix)) != 0) { 3621 device_printf(dev, "IFDI_MSIX_INTR_ASSIGN failed %d\n", err); 3622 goto fail_intr_free; 3623 } 3624 if (msix <= 1) { 3625 rid = 0; 3626 if (scctx->isc_intr == IFLIB_INTR_MSI) { 3627 MPASS(msix == 1); 3628 rid = 1; 3629 } 3630 if ((err = iflib_legacy_setup(ctx, ctx->isc_legacy_intr, ctx->ifc_softc, &rid, "irq0")) != 0) { 3631 device_printf(dev, "iflib_legacy_setup failed %d\n", err); 3632 goto fail_intr_free; 3633 } 3634 } 3635 ether_ifattach(ctx->ifc_ifp, ctx->ifc_mac); 3636 if ((err = IFDI_ATTACH_POST(ctx)) != 0) { 3637 device_printf(dev, "IFDI_ATTACH_POST failed %d\n", err); 3638 goto fail_detach; 3639 } 3640 if ((err = iflib_netmap_attach(ctx))) { 3641 device_printf(ctx->ifc_dev, "netmap attach failed: %d\n", err); 3642 goto fail_detach; 3643 } 3644 *ctxp = ctx; 3645 3646 if_setgetcounterfn(ctx->ifc_ifp, iflib_if_get_counter); 3647 iflib_add_device_sysctl_post(ctx); 3648 return (0); 3649fail_detach: 3650 ether_ifdetach(ctx->ifc_ifp); 3651fail_intr_free: 3652 if (scctx->isc_intr == IFLIB_INTR_MSIX || scctx->isc_intr == IFLIB_INTR_MSI) 3653 pci_release_msi(ctx->ifc_dev); 3654fail_queues: 3655 /* XXX free queues */ 3656fail: 3657 IFDI_DETACH(ctx); 3658 return (err); 3659} 3660 3661int 3662iflib_device_attach(device_t dev) 3663{ 3664 if_ctx_t ctx; 3665 if_shared_ctx_t sctx; 3666 3667 if ((sctx = DEVICE_REGISTER(dev)) == NULL || sctx->isc_magic != IFLIB_MAGIC) 3668 return (ENOTSUP); 3669 3670 pci_enable_busmaster(dev); 3671 3672 return (iflib_device_register(dev, NULL, sctx, &ctx)); 3673} 3674 3675int 3676iflib_device_deregister(if_ctx_t ctx) 3677{ 3678 if_t ifp = ctx->ifc_ifp; 3679 iflib_txq_t txq; 3680 iflib_rxq_t rxq; 3681 device_t dev = ctx->ifc_dev; 3682 int i; 3683 struct taskqgroup *tqg; 3684 3685 /* Make sure VLANS are not using driver */ 3686 if (if_vlantrunkinuse(ifp)) { 3687 device_printf(dev,"Vlan in use, detach first\n"); 3688 return (EBUSY); 3689 } 3690 3691 CTX_LOCK(ctx); 3692 ctx->ifc_in_detach = 1; 3693 iflib_stop(ctx); 3694 CTX_UNLOCK(ctx); 3695 3696 /* Unregister VLAN events */ 3697 if (ctx->ifc_vlan_attach_event != NULL) 3698 EVENTHANDLER_DEREGISTER(vlan_config, ctx->ifc_vlan_attach_event); 3699 if (ctx->ifc_vlan_detach_event != NULL) 3700 EVENTHANDLER_DEREGISTER(vlan_unconfig, ctx->ifc_vlan_detach_event); 3701 3702 iflib_netmap_detach(ifp); 3703 ether_ifdetach(ifp); 3704 /* ether_ifdetach calls if_qflush - lock must be destroy afterwards*/ 3705 CTX_LOCK_DESTROY(ctx); 3706 if (ctx->ifc_led_dev != NULL) 3707 led_destroy(ctx->ifc_led_dev); 3708 /* XXX drain any dependent tasks */ 3709 tqg = qgroup_softirq; 3710 for (txq = ctx->ifc_txqs, i = 0; i < NTXQSETS(ctx); i++, txq++) { 3711 callout_drain(&txq->ift_timer); 3712 callout_drain(&txq->ift_db_check); 3713 if (txq->ift_task.gt_uniq != NULL) 3714 taskqgroup_detach(tqg, &txq->ift_task); 3715 } 3716 for (i = 0, rxq = ctx->ifc_rxqs; i < NRXQSETS(ctx); i++, rxq++) { 3717 if (rxq->ifr_task.gt_uniq != NULL) 3718 taskqgroup_detach(tqg, &rxq->ifr_task); 3719 } 3720 tqg = qgroup_if_config_tqg; 3721 if (ctx->ifc_admin_task.gt_uniq != NULL) 3722 taskqgroup_detach(tqg, &ctx->ifc_admin_task); 3723 if (ctx->ifc_vflr_task.gt_uniq != NULL) 3724 taskqgroup_detach(tqg, &ctx->ifc_vflr_task); 3725 3726 IFDI_DETACH(ctx); 3727 device_set_softc(ctx->ifc_dev, NULL); 3728 if (ctx->ifc_softc_ctx.isc_intr != IFLIB_INTR_LEGACY) { 3729 pci_release_msi(dev); 3730 } 3731 if (ctx->ifc_softc_ctx.isc_intr != IFLIB_INTR_MSIX) { 3732 iflib_irq_free(ctx, &ctx->ifc_legacy_irq); 3733 } 3734 if (ctx->ifc_msix_mem != NULL) { 3735 bus_release_resource(ctx->ifc_dev, SYS_RES_MEMORY, 3736 ctx->ifc_softc_ctx.isc_msix_bar, ctx->ifc_msix_mem); 3737 ctx->ifc_msix_mem = NULL; 3738 } 3739 3740 bus_generic_detach(dev); 3741 if_free(ifp); 3742 3743 iflib_tx_structures_free(ctx); 3744 iflib_rx_structures_free(ctx); 3745 if (ctx->ifc_flags & IFC_SC_ALLOCATED) 3746 free(ctx->ifc_softc, M_IFLIB); 3747 free(ctx, M_IFLIB); 3748 return (0); 3749} 3750 3751 3752int 3753iflib_device_detach(device_t dev) 3754{ 3755 if_ctx_t ctx = device_get_softc(dev); 3756 3757 return (iflib_device_deregister(ctx)); 3758} 3759 3760int 3761iflib_device_suspend(device_t dev) 3762{ 3763 if_ctx_t ctx = device_get_softc(dev); 3764 3765 CTX_LOCK(ctx); 3766 IFDI_SUSPEND(ctx); 3767 CTX_UNLOCK(ctx); 3768 3769 return bus_generic_suspend(dev); 3770} 3771int 3772iflib_device_shutdown(device_t dev) 3773{ 3774 if_ctx_t ctx = device_get_softc(dev); 3775 3776 CTX_LOCK(ctx); 3777 IFDI_SHUTDOWN(ctx); 3778 CTX_UNLOCK(ctx); 3779 3780 return bus_generic_suspend(dev); 3781} 3782 3783 3784int 3785iflib_device_resume(device_t dev) 3786{ 3787 if_ctx_t ctx = device_get_softc(dev); 3788 iflib_txq_t txq = ctx->ifc_txqs; 3789 3790 CTX_LOCK(ctx); 3791 IFDI_RESUME(ctx); 3792 iflib_init_locked(ctx); 3793 CTX_UNLOCK(ctx); 3794 for (int i = 0; i < NTXQSETS(ctx); i++, txq++) 3795 iflib_txq_check_drain(txq, IFLIB_RESTART_BUDGET); 3796 3797 return (bus_generic_resume(dev)); 3798} 3799 3800int 3801iflib_device_iov_init(device_t dev, uint16_t num_vfs, const nvlist_t *params) 3802{ 3803 int error; 3804 if_ctx_t ctx = device_get_softc(dev); 3805 3806 CTX_LOCK(ctx); 3807 error = IFDI_IOV_INIT(ctx, num_vfs, params); 3808 CTX_UNLOCK(ctx); 3809 3810 return (error); 3811} 3812 3813void 3814iflib_device_iov_uninit(device_t dev) 3815{ 3816 if_ctx_t ctx = device_get_softc(dev); 3817 3818 CTX_LOCK(ctx); 3819 IFDI_IOV_UNINIT(ctx); 3820 CTX_UNLOCK(ctx); 3821} 3822 3823int 3824iflib_device_iov_add_vf(device_t dev, uint16_t vfnum, const nvlist_t *params) 3825{ 3826 int error; 3827 if_ctx_t ctx = device_get_softc(dev); 3828 3829 CTX_LOCK(ctx); 3830 error = IFDI_IOV_VF_ADD(ctx, vfnum, params); 3831 CTX_UNLOCK(ctx); 3832 3833 return (error); 3834} 3835 3836/********************************************************************* 3837 * 3838 * MODULE FUNCTION DEFINITIONS 3839 * 3840 **********************************************************************/ 3841 3842/* 3843 * - Start a fast taskqueue thread for each core 3844 * - Start a taskqueue for control operations 3845 */ 3846static int 3847iflib_module_init(void) 3848{ 3849 return (0); 3850} 3851 3852static int 3853iflib_module_event_handler(module_t mod, int what, void *arg) 3854{ 3855 int err; 3856 3857 switch (what) { 3858 case MOD_LOAD: 3859 if ((err = iflib_module_init()) != 0) 3860 return (err); 3861 break; 3862 case MOD_UNLOAD: 3863 return (EBUSY); 3864 default: 3865 return (EOPNOTSUPP); 3866 } 3867 3868 return (0); 3869} 3870 3871/********************************************************************* 3872 * 3873 * PUBLIC FUNCTION DEFINITIONS 3874 * ordered as in iflib.h 3875 * 3876 **********************************************************************/ 3877 3878 3879static void 3880_iflib_assert(if_shared_ctx_t sctx) 3881{ 3882 MPASS(sctx->isc_tx_maxsize); 3883 MPASS(sctx->isc_tx_maxsegsize); 3884 3885 MPASS(sctx->isc_rx_maxsize); 3886 MPASS(sctx->isc_rx_nsegments); 3887 MPASS(sctx->isc_rx_maxsegsize); 3888 3889 3890 MPASS(sctx->isc_txrx->ift_txd_encap); 3891 MPASS(sctx->isc_txrx->ift_txd_flush); 3892 MPASS(sctx->isc_txrx->ift_txd_credits_update); 3893 MPASS(sctx->isc_txrx->ift_rxd_available); 3894 MPASS(sctx->isc_txrx->ift_rxd_pkt_get); 3895 MPASS(sctx->isc_txrx->ift_rxd_refill); 3896 MPASS(sctx->isc_txrx->ift_rxd_flush); 3897 3898 MPASS(sctx->isc_nrxd_min[0]); 3899 MPASS(sctx->isc_nrxd_max[0]); 3900 MPASS(sctx->isc_nrxd_default[0]); 3901 MPASS(sctx->isc_ntxd_min[0]); 3902 MPASS(sctx->isc_ntxd_max[0]); 3903 MPASS(sctx->isc_ntxd_default[0]); 3904} 3905 3906static int 3907iflib_register(if_ctx_t ctx) 3908{ 3909 if_shared_ctx_t sctx = ctx->ifc_sctx; 3910 driver_t *driver = sctx->isc_driver; 3911 device_t dev = ctx->ifc_dev; 3912 if_t ifp; 3913 3914 _iflib_assert(sctx); 3915 3916 CTX_LOCK_INIT(ctx, device_get_nameunit(ctx->ifc_dev)); 3917 3918 ifp = ctx->ifc_ifp = if_gethandle(IFT_ETHER); 3919 if (ifp == NULL) { 3920 device_printf(dev, "can not allocate ifnet structure\n"); 3921 return (ENOMEM); 3922 } 3923 3924 /* 3925 * Initialize our context's device specific methods 3926 */ 3927 kobj_init((kobj_t) ctx, (kobj_class_t) driver); 3928 kobj_class_compile((kobj_class_t) driver); 3929 driver->refs++; 3930 3931 if_initname(ifp, device_get_name(dev), device_get_unit(dev)); 3932 if_setsoftc(ifp, ctx); 3933 if_setdev(ifp, dev); 3934 if_setinitfn(ifp, iflib_if_init); 3935 if_setioctlfn(ifp, iflib_if_ioctl); 3936 if_settransmitfn(ifp, iflib_if_transmit); 3937 if_setqflushfn(ifp, iflib_if_qflush); 3938 if_setflags(ifp, IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST); 3939 3940 if_setcapabilities(ifp, 0); 3941 if_setcapenable(ifp, 0); 3942 3943 ctx->ifc_vlan_attach_event = 3944 EVENTHANDLER_REGISTER(vlan_config, iflib_vlan_register, ctx, 3945 EVENTHANDLER_PRI_FIRST); 3946 ctx->ifc_vlan_detach_event = 3947 EVENTHANDLER_REGISTER(vlan_unconfig, iflib_vlan_unregister, ctx, 3948 EVENTHANDLER_PRI_FIRST); 3949 3950 ifmedia_init(&ctx->ifc_media, IFM_IMASK, 3951 iflib_media_change, iflib_media_status); 3952 3953 return (0); 3954} 3955 3956 3957static int 3958iflib_queues_alloc(if_ctx_t ctx) 3959{ 3960 if_shared_ctx_t sctx = ctx->ifc_sctx; 3961 if_softc_ctx_t scctx = &ctx->ifc_softc_ctx; 3962 device_t dev = ctx->ifc_dev; 3963 int nrxqsets = scctx->isc_nrxqsets; 3964 int ntxqsets = scctx->isc_ntxqsets; 3965 iflib_txq_t txq; 3966 iflib_rxq_t rxq; 3967 iflib_fl_t fl = NULL; 3968 int i, j, cpu, err, txconf, rxconf; 3969 iflib_dma_info_t ifdip; 3970 uint32_t *rxqsizes = scctx->isc_rxqsizes; 3971 uint32_t *txqsizes = scctx->isc_txqsizes; 3972 uint8_t nrxqs = sctx->isc_nrxqs; 3973 uint8_t ntxqs = sctx->isc_ntxqs; 3974 int nfree_lists = sctx->isc_nfl ? sctx->isc_nfl : 1; 3975 caddr_t *vaddrs; 3976 uint64_t *paddrs; 3977 struct ifmp_ring **brscp; 3978 int nbuf_rings = 1; /* XXX determine dynamically */ 3979 3980 KASSERT(ntxqs > 0, ("number of queues per qset must be at least 1")); 3981 KASSERT(nrxqs > 0, ("number of queues per qset must be at least 1")); 3982 3983 brscp = NULL; 3984 txq = NULL; 3985 rxq = NULL; 3986 3987/* Allocate the TX ring struct memory */ 3988 if (!(txq = 3989 (iflib_txq_t) malloc(sizeof(struct iflib_txq) * 3990 ntxqsets, M_IFLIB, M_NOWAIT | M_ZERO))) { 3991 device_printf(dev, "Unable to allocate TX ring memory\n"); 3992 err = ENOMEM; 3993 goto fail; 3994 } 3995 3996 /* Now allocate the RX */ 3997 if (!(rxq = 3998 (iflib_rxq_t) malloc(sizeof(struct iflib_rxq) * 3999 nrxqsets, M_IFLIB, M_NOWAIT | M_ZERO))) { 4000 device_printf(dev, "Unable to allocate RX ring memory\n"); 4001 err = ENOMEM; 4002 goto rx_fail; 4003 } 4004 if (!(brscp = malloc(sizeof(void *) * nbuf_rings * nrxqsets, M_IFLIB, M_NOWAIT | M_ZERO))) { 4005 device_printf(dev, "Unable to buf_ring_sc * memory\n"); 4006 err = ENOMEM; 4007 goto rx_fail; 4008 } 4009 4010 ctx->ifc_txqs = txq; 4011 ctx->ifc_rxqs = rxq; 4012 4013 /* 4014 * XXX handle allocation failure 4015 */ 4016 for (txconf = i = 0, cpu = CPU_FIRST(); i < ntxqsets; i++, txconf++, txq++, cpu = CPU_NEXT(cpu)) { 4017 /* Set up some basics */ 4018 4019 if ((ifdip = malloc(sizeof(struct iflib_dma_info) * ntxqs, M_IFLIB, M_WAITOK|M_ZERO)) == NULL) { 4020 device_printf(dev, "failed to allocate iflib_dma_info\n"); 4021 err = ENOMEM; 4022 goto err_tx_desc; 4023 } 4024 txq->ift_ifdi = ifdip; 4025 for (j = 0; j < ntxqs; j++, ifdip++) { 4026 if (iflib_dma_alloc(ctx, txqsizes[j], ifdip, BUS_DMA_NOWAIT)) { 4027 device_printf(dev, "Unable to allocate Descriptor memory\n"); 4028 err = ENOMEM; 4029 goto err_tx_desc; 4030 } 4031 bzero((void *)ifdip->idi_vaddr, txqsizes[j]); 4032 } 4033 txq->ift_ctx = ctx; 4034 txq->ift_id = i; 4035 if (sctx->isc_flags & IFLIB_HAS_TXCQ) { 4036 txq->ift_br_offset = 1; 4037 } else { 4038 txq->ift_br_offset = 0; 4039 } 4040 /* XXX fix this */ 4041 txq->ift_timer.c_cpu = cpu; 4042 txq->ift_db_check.c_cpu = cpu; 4043 txq->ift_nbr = nbuf_rings; 4044 4045 if (iflib_txsd_alloc(txq)) { 4046 device_printf(dev, "Critical Failure setting up TX buffers\n"); 4047 err = ENOMEM; 4048 goto err_tx_desc; 4049 } 4050 4051 /* Initialize the TX lock */ 4052 snprintf(txq->ift_mtx_name, MTX_NAME_LEN, "%s:tx(%d):callout", 4053 device_get_nameunit(dev), txq->ift_id); 4054 mtx_init(&txq->ift_mtx, txq->ift_mtx_name, NULL, MTX_DEF); 4055 callout_init_mtx(&txq->ift_timer, &txq->ift_mtx, 0); 4056 callout_init_mtx(&txq->ift_db_check, &txq->ift_mtx, 0); 4057 4058 snprintf(txq->ift_db_mtx_name, MTX_NAME_LEN, "%s:tx(%d):db", 4059 device_get_nameunit(dev), txq->ift_id); 4060 TXDB_LOCK_INIT(txq); 4061 4062 txq->ift_br = brscp + i*nbuf_rings; 4063 for (j = 0; j < nbuf_rings; j++) { 4064 err = ifmp_ring_alloc(&txq->ift_br[j], 2048, txq, iflib_txq_drain, 4065 iflib_txq_can_drain, M_IFLIB, M_WAITOK); 4066 if (err) { 4067 /* XXX free any allocated rings */ 4068 device_printf(dev, "Unable to allocate buf_ring\n"); 4069 goto err_tx_desc; 4070 } 4071 } 4072 } 4073 4074 for (rxconf = i = 0; i < nrxqsets; i++, rxconf++, rxq++) { 4075 /* Set up some basics */ 4076 4077 if ((ifdip = malloc(sizeof(struct iflib_dma_info) * nrxqs, M_IFLIB, M_WAITOK|M_ZERO)) == NULL) { 4078 device_printf(dev, "failed to allocate iflib_dma_info\n"); 4079 err = ENOMEM; 4080 goto err_tx_desc; 4081 } 4082 4083 rxq->ifr_ifdi = ifdip; 4084 for (j = 0; j < nrxqs; j++, ifdip++) { 4085 if (iflib_dma_alloc(ctx, rxqsizes[j], ifdip, BUS_DMA_NOWAIT)) { 4086 device_printf(dev, "Unable to allocate Descriptor memory\n"); 4087 err = ENOMEM; 4088 goto err_tx_desc; 4089 } 4090 bzero((void *)ifdip->idi_vaddr, rxqsizes[j]); 4091 } 4092 rxq->ifr_ctx = ctx; 4093 rxq->ifr_id = i; 4094 if (sctx->isc_flags & IFLIB_HAS_RXCQ) { 4095 rxq->ifr_fl_offset = 1; 4096 } else { 4097 rxq->ifr_fl_offset = 0; 4098 } 4099 rxq->ifr_nfl = nfree_lists; 4100 if (!(fl = 4101 (iflib_fl_t) malloc(sizeof(struct iflib_fl) * nfree_lists, M_IFLIB, M_NOWAIT | M_ZERO))) { 4102 device_printf(dev, "Unable to allocate free list memory\n"); 4103 err = ENOMEM; 4104 goto err_tx_desc; 4105 } 4106 rxq->ifr_fl = fl; 4107 for (j = 0; j < nfree_lists; j++) { 4108 rxq->ifr_fl[j].ifl_rxq = rxq; 4109 rxq->ifr_fl[j].ifl_id = j; 4110 rxq->ifr_fl[j].ifl_ifdi = 4111 &rxq->ifr_ifdi[j + rxq->ifr_fl_offset]; 4112 } 4113 /* Allocate receive buffers for the ring*/ 4114 if (iflib_rxsd_alloc(rxq)) { 4115 device_printf(dev, 4116 "Critical Failure setting up receive buffers\n"); 4117 err = ENOMEM; 4118 goto err_rx_desc; 4119 } 4120 } 4121 4122 /* TXQs */ 4123 vaddrs = malloc(sizeof(caddr_t)*ntxqsets*ntxqs, M_IFLIB, M_WAITOK); 4124 paddrs = malloc(sizeof(uint64_t)*ntxqsets*ntxqs, M_IFLIB, M_WAITOK); 4125 for (i = 0; i < ntxqsets; i++) { 4126 iflib_dma_info_t di = ctx->ifc_txqs[i].ift_ifdi; 4127 4128 for (j = 0; j < ntxqs; j++, di++) { 4129 vaddrs[i*ntxqs + j] = di->idi_vaddr; 4130 paddrs[i*ntxqs + j] = di->idi_paddr; 4131 } 4132 } 4133 if ((err = IFDI_TX_QUEUES_ALLOC(ctx, vaddrs, paddrs, ntxqs, ntxqsets)) != 0) { 4134 device_printf(ctx->ifc_dev, "device queue allocation failed\n"); 4135 iflib_tx_structures_free(ctx); 4136 free(vaddrs, M_IFLIB); 4137 free(paddrs, M_IFLIB); 4138 goto err_rx_desc; 4139 } 4140 free(vaddrs, M_IFLIB); 4141 free(paddrs, M_IFLIB); 4142 4143 /* RXQs */ 4144 vaddrs = malloc(sizeof(caddr_t)*nrxqsets*nrxqs, M_IFLIB, M_WAITOK); 4145 paddrs = malloc(sizeof(uint64_t)*nrxqsets*nrxqs, M_IFLIB, M_WAITOK); 4146 for (i = 0; i < nrxqsets; i++) { 4147 iflib_dma_info_t di = ctx->ifc_rxqs[i].ifr_ifdi; 4148 4149 for (j = 0; j < nrxqs; j++, di++) { 4150 vaddrs[i*nrxqs + j] = di->idi_vaddr; 4151 paddrs[i*nrxqs + j] = di->idi_paddr; 4152 } 4153 } 4154 if ((err = IFDI_RX_QUEUES_ALLOC(ctx, vaddrs, paddrs, nrxqs, nrxqsets)) != 0) { 4155 device_printf(ctx->ifc_dev, "device queue allocation failed\n"); 4156 iflib_tx_structures_free(ctx); 4157 free(vaddrs, M_IFLIB); 4158 free(paddrs, M_IFLIB); 4159 goto err_rx_desc; 4160 } 4161 free(vaddrs, M_IFLIB); 4162 free(paddrs, M_IFLIB); 4163 4164 return (0); 4165 4166/* XXX handle allocation failure changes */ 4167err_rx_desc: 4168err_tx_desc: 4169 if (ctx->ifc_rxqs != NULL) 4170 free(ctx->ifc_rxqs, M_IFLIB); 4171 ctx->ifc_rxqs = NULL; 4172 if (ctx->ifc_txqs != NULL) 4173 free(ctx->ifc_txqs, M_IFLIB); 4174 ctx->ifc_txqs = NULL; 4175rx_fail: 4176 if (brscp != NULL) 4177 free(brscp, M_IFLIB); 4178 if (rxq != NULL) 4179 free(rxq, M_IFLIB); 4180 if (txq != NULL) 4181 free(txq, M_IFLIB); 4182fail: 4183 return (err); 4184} 4185 4186static int 4187iflib_tx_structures_setup(if_ctx_t ctx) 4188{ 4189 iflib_txq_t txq = ctx->ifc_txqs; 4190 int i; 4191 4192 for (i = 0; i < NTXQSETS(ctx); i++, txq++) 4193 iflib_txq_setup(txq); 4194 4195 return (0); 4196} 4197 4198static void 4199iflib_tx_structures_free(if_ctx_t ctx) 4200{ 4201 iflib_txq_t txq = ctx->ifc_txqs; 4202 int i, j; 4203 4204 for (i = 0; i < NTXQSETS(ctx); i++, txq++) { 4205 iflib_txq_destroy(txq); 4206 for (j = 0; j < ctx->ifc_nhwtxqs; j++) 4207 iflib_dma_free(&txq->ift_ifdi[j]); 4208 } 4209 free(ctx->ifc_txqs, M_IFLIB); 4210 ctx->ifc_txqs = NULL; 4211 IFDI_QUEUES_FREE(ctx); 4212} 4213 4214/********************************************************************* 4215 * 4216 * Initialize all receive rings. 4217 * 4218 **********************************************************************/ 4219static int 4220iflib_rx_structures_setup(if_ctx_t ctx) 4221{ 4222 iflib_rxq_t rxq = ctx->ifc_rxqs; 4223 int q; 4224#if defined(INET6) || defined(INET) 4225 int i, err; 4226#endif 4227 4228 for (q = 0; q < ctx->ifc_softc_ctx.isc_nrxqsets; q++, rxq++) { 4229#if defined(INET6) || defined(INET) 4230 tcp_lro_free(&rxq->ifr_lc); 4231 if ((err = tcp_lro_init_args(&rxq->ifr_lc, ctx->ifc_ifp, 4232 TCP_LRO_ENTRIES, min(1024, 4233 ctx->ifc_softc_ctx.isc_nrxd[rxq->ifr_fl_offset]))) != 0) { 4234 device_printf(ctx->ifc_dev, "LRO Initialization failed!\n"); 4235 goto fail; 4236 } 4237 rxq->ifr_lro_enabled = TRUE; 4238#endif 4239 IFDI_RXQ_SETUP(ctx, rxq->ifr_id); 4240 } 4241 return (0); 4242#if defined(INET6) || defined(INET) 4243fail: 4244 /* 4245 * Free RX software descriptors allocated so far, we will only handle 4246 * the rings that completed, the failing case will have 4247 * cleaned up for itself. 'q' failed, so its the terminus. 4248 */ 4249 rxq = ctx->ifc_rxqs; 4250 for (i = 0; i < q; ++i, rxq++) { 4251 iflib_rx_sds_free(rxq); 4252 rxq->ifr_cq_gen = rxq->ifr_cq_cidx = rxq->ifr_cq_pidx = 0; 4253 } 4254 return (err); 4255#endif 4256} 4257 4258/********************************************************************* 4259 * 4260 * Free all receive rings. 4261 * 4262 **********************************************************************/ 4263static void 4264iflib_rx_structures_free(if_ctx_t ctx) 4265{ 4266 iflib_rxq_t rxq = ctx->ifc_rxqs; 4267 4268 for (int i = 0; i < ctx->ifc_softc_ctx.isc_nrxqsets; i++, rxq++) { 4269 iflib_rx_sds_free(rxq); 4270 } 4271} 4272 4273static int 4274iflib_qset_structures_setup(if_ctx_t ctx) 4275{ 4276 int err; 4277 4278 if ((err = iflib_tx_structures_setup(ctx)) != 0) 4279 return (err); 4280 4281 if ((err = iflib_rx_structures_setup(ctx)) != 0) { 4282 device_printf(ctx->ifc_dev, "iflib_rx_structures_setup failed: %d\n", err); 4283 iflib_tx_structures_free(ctx); 4284 iflib_rx_structures_free(ctx); 4285 } 4286 return (err); 4287} 4288 4289int 4290iflib_irq_alloc(if_ctx_t ctx, if_irq_t irq, int rid, 4291 driver_filter_t filter, void *filter_arg, driver_intr_t handler, void *arg, char *name) 4292{ 4293 4294 return (_iflib_irq_alloc(ctx, irq, rid, filter, handler, arg, name)); 4295} 4296 4297static void 4298find_nth(if_ctx_t ctx, cpuset_t *cpus, int qid) 4299{ 4300 int i, cpuid; 4301 4302 CPU_COPY(&ctx->ifc_cpus, cpus); 4303 /* clear up to the qid'th bit */ 4304 for (i = 0; i < qid; i++) { 4305 cpuid = CPU_FFS(cpus); 4306 CPU_CLR(cpuid, cpus); 4307 } 4308} 4309 4310int 4311iflib_irq_alloc_generic(if_ctx_t ctx, if_irq_t irq, int rid, 4312 iflib_intr_type_t type, driver_filter_t *filter, 4313 void *filter_arg, int qid, char *name) 4314{ 4315 struct grouptask *gtask; 4316 struct taskqgroup *tqg; 4317 iflib_filter_info_t info; 4318 cpuset_t cpus; 4319 gtask_fn_t *fn; 4320 int tqrid, err; 4321 void *q; 4322 4323 info = &ctx->ifc_filter_info; 4324 4325 switch (type) { 4326 /* XXX merge tx/rx for netmap? */ 4327 case IFLIB_INTR_TX: 4328 q = &ctx->ifc_txqs[qid]; 4329 info = &ctx->ifc_txqs[qid].ift_filter_info; 4330 gtask = &ctx->ifc_txqs[qid].ift_task; 4331 tqg = qgroup_softirq; 4332 tqrid = irq->ii_rid; 4333 fn = _task_fn_tx; 4334 break; 4335 case IFLIB_INTR_RX: 4336 q = &ctx->ifc_rxqs[qid]; 4337 info = &ctx->ifc_rxqs[qid].ifr_filter_info; 4338 gtask = &ctx->ifc_rxqs[qid].ifr_task; 4339 tqg = qgroup_softirq; 4340 tqrid = irq->ii_rid; 4341 fn = _task_fn_rx; 4342 break; 4343 case IFLIB_INTR_ADMIN: 4344 q = ctx; 4345 info = &ctx->ifc_filter_info; 4346 gtask = &ctx->ifc_admin_task; 4347 tqg = qgroup_if_config_tqg; 4348 tqrid = -1; 4349 fn = _task_fn_admin; 4350 break; 4351 default: 4352 panic("unknown net intr type"); 4353 } 4354 GROUPTASK_INIT(gtask, 0, fn, q); 4355 4356 info->ifi_filter = filter; 4357 info->ifi_filter_arg = filter_arg; 4358 info->ifi_task = gtask; 4359 4360 /* XXX query cpu that rid belongs to */ 4361 4362 err = _iflib_irq_alloc(ctx, irq, rid, iflib_fast_intr, NULL, info, name); 4363 if (err != 0) 4364 return (err); 4365 if (tqrid != -1) { 4366 find_nth(ctx, &cpus, qid); 4367 taskqgroup_attach_cpu(tqg, gtask, q, CPU_FFS(&cpus), irq->ii_rid, name); 4368 } else 4369 taskqgroup_attach(tqg, gtask, q, tqrid, name); 4370 4371 4372 return (0); 4373} 4374 4375void 4376iflib_softirq_alloc_generic(if_ctx_t ctx, int rid, iflib_intr_type_t type, void *arg, int qid, char *name) 4377{ 4378 struct grouptask *gtask; 4379 struct taskqgroup *tqg; 4380 gtask_fn_t *fn; 4381 void *q; 4382 4383 switch (type) { 4384 case IFLIB_INTR_TX: 4385 q = &ctx->ifc_txqs[qid]; 4386 gtask = &ctx->ifc_txqs[qid].ift_task; 4387 tqg = qgroup_softirq; 4388 fn = _task_fn_tx; 4389 break; 4390 case IFLIB_INTR_RX: 4391 q = &ctx->ifc_rxqs[qid]; 4392 gtask = &ctx->ifc_rxqs[qid].ifr_task; 4393 tqg = qgroup_softirq; 4394 fn = _task_fn_rx; 4395 break; 4396 case IFLIB_INTR_ADMIN: 4397 q = ctx; 4398 gtask = &ctx->ifc_admin_task; 4399 tqg = qgroup_if_config_tqg; 4400 rid = -1; 4401 fn = _task_fn_admin; 4402 break; 4403 case IFLIB_INTR_IOV: 4404 q = ctx; 4405 gtask = &ctx->ifc_vflr_task; 4406 tqg = qgroup_if_config_tqg; 4407 rid = -1; 4408 fn = _task_fn_iov; 4409 break; 4410 default: 4411 panic("unknown net intr type"); 4412 } 4413 GROUPTASK_INIT(gtask, 0, fn, q); 4414 taskqgroup_attach(tqg, gtask, q, rid, name); 4415} 4416 4417void 4418iflib_irq_free(if_ctx_t ctx, if_irq_t irq) 4419{ 4420 if (irq->ii_tag) 4421 bus_teardown_intr(ctx->ifc_dev, irq->ii_res, irq->ii_tag); 4422 4423 if (irq->ii_res) 4424 bus_release_resource(ctx->ifc_dev, SYS_RES_IRQ, irq->ii_rid, irq->ii_res); 4425} 4426 4427static int 4428iflib_legacy_setup(if_ctx_t ctx, driver_filter_t filter, void *filter_arg, int *rid, char *name) 4429{ 4430 iflib_txq_t txq = ctx->ifc_txqs; 4431 iflib_rxq_t rxq = ctx->ifc_rxqs; 4432 if_irq_t irq = &ctx->ifc_legacy_irq; 4433 iflib_filter_info_t info; 4434 struct grouptask *gtask; 4435 struct taskqgroup *tqg; 4436 gtask_fn_t *fn; 4437 int tqrid; 4438 void *q; 4439 int err; 4440 4441 q = &ctx->ifc_rxqs[0]; 4442 info = &rxq[0].ifr_filter_info; 4443 gtask = &rxq[0].ifr_task; 4444 tqg = qgroup_softirq; 4445 tqrid = irq->ii_rid = *rid; 4446 fn = _task_fn_rx; 4447 4448 ctx->ifc_flags |= IFC_LEGACY; 4449 info->ifi_filter = filter; 4450 info->ifi_filter_arg = filter_arg; 4451 info->ifi_task = gtask; 4452 4453 /* We allocate a single interrupt resource */ 4454 if ((err = _iflib_irq_alloc(ctx, irq, tqrid, iflib_fast_intr, NULL, info, name)) != 0) 4455 return (err); 4456 GROUPTASK_INIT(gtask, 0, fn, q); 4457 taskqgroup_attach(tqg, gtask, q, tqrid, name); 4458 4459 GROUPTASK_INIT(&txq->ift_task, 0, _task_fn_tx, txq); 4460 taskqgroup_attach(qgroup_softirq, &txq->ift_task, txq, tqrid, "tx"); 4461 GROUPTASK_INIT(&ctx->ifc_admin_task, 0, _task_fn_admin, ctx); 4462 taskqgroup_attach(qgroup_if_config_tqg, &ctx->ifc_admin_task, ctx, -1, "admin/link"); 4463 4464 return (0); 4465} 4466 4467void 4468iflib_led_create(if_ctx_t ctx) 4469{ 4470 4471 ctx->ifc_led_dev = led_create(iflib_led_func, ctx, 4472 device_get_nameunit(ctx->ifc_dev)); 4473} 4474 4475void 4476iflib_tx_intr_deferred(if_ctx_t ctx, int txqid) 4477{ 4478 4479 GROUPTASK_ENQUEUE(&ctx->ifc_txqs[txqid].ift_task); 4480} 4481 4482void 4483iflib_rx_intr_deferred(if_ctx_t ctx, int rxqid) 4484{ 4485 4486 GROUPTASK_ENQUEUE(&ctx->ifc_rxqs[rxqid].ifr_task); 4487} 4488 4489void 4490iflib_admin_intr_deferred(if_ctx_t ctx) 4491{ 4492 4493 GROUPTASK_ENQUEUE(&ctx->ifc_admin_task); 4494} 4495 4496void 4497iflib_iov_intr_deferred(if_ctx_t ctx) 4498{ 4499 4500 GROUPTASK_ENQUEUE(&ctx->ifc_vflr_task); 4501} 4502 4503void 4504iflib_io_tqg_attach(struct grouptask *gt, void *uniq, int cpu, char *name) 4505{ 4506 4507 taskqgroup_attach_cpu(qgroup_softirq, gt, uniq, cpu, -1, name); 4508} 4509 4510void 4511iflib_config_gtask_init(if_ctx_t ctx, struct grouptask *gtask, gtask_fn_t *fn, 4512 char *name) 4513{ 4514 4515 GROUPTASK_INIT(gtask, 0, fn, ctx); 4516 taskqgroup_attach(qgroup_if_config_tqg, gtask, gtask, -1, name); 4517} 4518 4519void 4520iflib_config_gtask_deinit(struct grouptask *gtask) 4521{ 4522 4523 taskqgroup_detach(qgroup_if_config_tqg, gtask); 4524} 4525 4526void 4527iflib_link_state_change(if_ctx_t ctx, int link_state, uint64_t baudrate) 4528{ 4529 if_t ifp = ctx->ifc_ifp; 4530 iflib_txq_t txq = ctx->ifc_txqs; 4531 4532 4533 if_setbaudrate(ifp, baudrate); 4534 4535 /* If link down, disable watchdog */ 4536 if ((ctx->ifc_link_state == LINK_STATE_UP) && (link_state == LINK_STATE_DOWN)) { 4537 for (int i = 0; i < ctx->ifc_softc_ctx.isc_ntxqsets; i++, txq++) 4538 txq->ift_qstatus = IFLIB_QUEUE_IDLE; 4539 } 4540 ctx->ifc_link_state = link_state; 4541 if_link_state_change(ifp, link_state); 4542} 4543 4544static int 4545iflib_tx_credits_update(if_ctx_t ctx, iflib_txq_t txq) 4546{ 4547 int credits; 4548 4549 if (ctx->isc_txd_credits_update == NULL) 4550 return (0); 4551 4552 if ((credits = ctx->isc_txd_credits_update(ctx->ifc_softc, txq->ift_id, txq->ift_cidx_processed, true)) == 0) 4553 return (0); 4554 4555 txq->ift_processed += credits; 4556 txq->ift_cidx_processed += credits; 4557 4558 if (txq->ift_cidx_processed >= txq->ift_size) 4559 txq->ift_cidx_processed -= txq->ift_size; 4560 return (credits); 4561} 4562 4563static int 4564iflib_rxd_avail(if_ctx_t ctx, iflib_rxq_t rxq, int cidx, int budget) 4565{ 4566 4567 return (ctx->isc_rxd_available(ctx->ifc_softc, rxq->ifr_id, cidx, 4568 budget)); 4569} 4570 4571void 4572iflib_add_int_delay_sysctl(if_ctx_t ctx, const char *name, 4573 const char *description, if_int_delay_info_t info, 4574 int offset, int value) 4575{ 4576 info->iidi_ctx = ctx; 4577 info->iidi_offset = offset; 4578 info->iidi_value = value; 4579 SYSCTL_ADD_PROC(device_get_sysctl_ctx(ctx->ifc_dev), 4580 SYSCTL_CHILDREN(device_get_sysctl_tree(ctx->ifc_dev)), 4581 OID_AUTO, name, CTLTYPE_INT|CTLFLAG_RW, 4582 info, 0, iflib_sysctl_int_delay, "I", description); 4583} 4584 4585struct mtx * 4586iflib_ctx_lock_get(if_ctx_t ctx) 4587{ 4588 4589 return (&ctx->ifc_mtx); 4590} 4591 4592static int 4593iflib_msix_init(if_ctx_t ctx) 4594{ 4595 device_t dev = ctx->ifc_dev; 4596 if_shared_ctx_t sctx = ctx->ifc_sctx; 4597 if_softc_ctx_t scctx = &ctx->ifc_softc_ctx; 4598 int vectors, queues, rx_queues, tx_queues, queuemsgs, msgs; 4599 int iflib_num_tx_queues, iflib_num_rx_queues; 4600 int err, admincnt, bar; 4601 4602 iflib_num_tx_queues = scctx->isc_ntxqsets; 4603 iflib_num_rx_queues = scctx->isc_nrxqsets; 4604 4605 bar = ctx->ifc_softc_ctx.isc_msix_bar; 4606 admincnt = sctx->isc_admin_intrcnt; 4607 /* Override by tuneable */ 4608 if (enable_msix == 0) 4609 goto msi; 4610 4611 /* 4612 ** When used in a virtualized environment 4613 ** PCI BUSMASTER capability may not be set 4614 ** so explicity set it here and rewrite 4615 ** the ENABLE in the MSIX control register 4616 ** at this point to cause the host to 4617 ** successfully initialize us. 4618 */ 4619 { 4620 uint16_t pci_cmd_word; 4621 int msix_ctrl, rid; 4622 4623 rid = 0; 4624 pci_cmd_word = pci_read_config(dev, PCIR_COMMAND, 2); 4625 pci_cmd_word |= PCIM_CMD_BUSMASTEREN; 4626 pci_write_config(dev, PCIR_COMMAND, pci_cmd_word, 2); 4627 pci_find_cap(dev, PCIY_MSIX, &rid); 4628 rid += PCIR_MSIX_CTRL; 4629 msix_ctrl = pci_read_config(dev, rid, 2); 4630 msix_ctrl |= PCIM_MSIXCTRL_MSIX_ENABLE; 4631 pci_write_config(dev, rid, msix_ctrl, 2); 4632 } 4633 4634 /* 4635 * bar == -1 => "trust me I know what I'm doing" 4636 * Some drivers are for hardware that is so shoddily 4637 * documented that no one knows which bars are which 4638 * so the developer has to map all bars. This hack 4639 * allows shoddy garbage to use msix in this framework. 4640 */ 4641 if (bar != -1) { 4642 ctx->ifc_msix_mem = bus_alloc_resource_any(dev, 4643 SYS_RES_MEMORY, &bar, RF_ACTIVE); 4644 if (ctx->ifc_msix_mem == NULL) { 4645 /* May not be enabled */ 4646 device_printf(dev, "Unable to map MSIX table \n"); 4647 goto msi; 4648 } 4649 } 4650 /* First try MSI/X */ 4651 if ((msgs = pci_msix_count(dev)) == 0) { /* system has msix disabled */ 4652 device_printf(dev, "System has MSIX disabled \n"); 4653 bus_release_resource(dev, SYS_RES_MEMORY, 4654 bar, ctx->ifc_msix_mem); 4655 ctx->ifc_msix_mem = NULL; 4656 goto msi; 4657 } 4658#if IFLIB_DEBUG 4659 /* use only 1 qset in debug mode */ 4660 queuemsgs = min(msgs - admincnt, 1); 4661#else 4662 queuemsgs = msgs - admincnt; 4663#endif 4664 if (bus_get_cpus(dev, INTR_CPUS, sizeof(ctx->ifc_cpus), &ctx->ifc_cpus) == 0) { 4665#ifdef RSS 4666 queues = imin(queuemsgs, rss_getnumbuckets()); 4667#else 4668 queues = queuemsgs; 4669#endif 4670 queues = imin(CPU_COUNT(&ctx->ifc_cpus), queues); 4671 device_printf(dev, "pxm cpus: %d queue msgs: %d admincnt: %d\n", 4672 CPU_COUNT(&ctx->ifc_cpus), queuemsgs, admincnt); 4673 } else { 4674 device_printf(dev, "Unable to fetch CPU list\n"); 4675 /* Figure out a reasonable auto config value */ 4676 queues = min(queuemsgs, mp_ncpus); 4677 } 4678#ifdef RSS 4679 /* If we're doing RSS, clamp at the number of RSS buckets */ 4680 if (queues > rss_getnumbuckets()) 4681 queues = rss_getnumbuckets(); 4682#endif 4683 if (iflib_num_rx_queues > 0 && iflib_num_rx_queues < queuemsgs - admincnt) 4684 rx_queues = iflib_num_rx_queues; 4685 else 4686 rx_queues = queues; 4687 /* 4688 * We want this to be all logical CPUs by default 4689 */ 4690 if (iflib_num_tx_queues > 0 && iflib_num_tx_queues < queues) 4691 tx_queues = iflib_num_tx_queues; 4692 else 4693 tx_queues = mp_ncpus; 4694 4695 if (ctx->ifc_sysctl_qs_eq_override == 0) { 4696#ifdef INVARIANTS 4697 if (tx_queues != rx_queues) 4698 device_printf(dev, "queue equality override not set, capping rx_queues at %d and tx_queues at %d\n", 4699 min(rx_queues, tx_queues), min(rx_queues, tx_queues)); 4700#endif 4701 tx_queues = min(rx_queues, tx_queues); 4702 rx_queues = min(rx_queues, tx_queues); 4703 } 4704 4705 device_printf(dev, "using %d rx queues %d tx queues \n", rx_queues, tx_queues); 4706 4707 vectors = rx_queues + admincnt; 4708 if ((err = pci_alloc_msix(dev, &vectors)) == 0) { 4709 device_printf(dev, 4710 "Using MSIX interrupts with %d vectors\n", vectors); 4711 scctx->isc_vectors = vectors; 4712 scctx->isc_nrxqsets = rx_queues; 4713 scctx->isc_ntxqsets = tx_queues; 4714 scctx->isc_intr = IFLIB_INTR_MSIX; 4715 4716 return (vectors); 4717 } else { 4718 device_printf(dev, "failed to allocate %d msix vectors, err: %d - using MSI\n", vectors, err); 4719 } 4720msi: 4721 vectors = pci_msi_count(dev); 4722 scctx->isc_nrxqsets = 1; 4723 scctx->isc_ntxqsets = 1; 4724 scctx->isc_vectors = vectors; 4725 if (vectors == 1 && pci_alloc_msi(dev, &vectors) == 0) { 4726 device_printf(dev,"Using an MSI interrupt\n"); 4727 scctx->isc_intr = IFLIB_INTR_MSI; 4728 } else { 4729 device_printf(dev,"Using a Legacy interrupt\n"); 4730 scctx->isc_intr = IFLIB_INTR_LEGACY; 4731 } 4732 4733 return (vectors); 4734} 4735 4736char * ring_states[] = { "IDLE", "BUSY", "STALLED", "ABDICATED" }; 4737 4738static int 4739mp_ring_state_handler(SYSCTL_HANDLER_ARGS) 4740{ 4741 int rc; 4742 uint16_t *state = ((uint16_t *)oidp->oid_arg1); 4743 struct sbuf *sb; 4744 char *ring_state = "UNKNOWN"; 4745 4746 /* XXX needed ? */ 4747 rc = sysctl_wire_old_buffer(req, 0); 4748 MPASS(rc == 0); 4749 if (rc != 0) 4750 return (rc); 4751 sb = sbuf_new_for_sysctl(NULL, NULL, 80, req); 4752 MPASS(sb != NULL); 4753 if (sb == NULL) 4754 return (ENOMEM); 4755 if (state[3] <= 3) 4756 ring_state = ring_states[state[3]]; 4757 4758 sbuf_printf(sb, "pidx_head: %04hd pidx_tail: %04hd cidx: %04hd state: %s", 4759 state[0], state[1], state[2], ring_state); 4760 rc = sbuf_finish(sb); 4761 sbuf_delete(sb); 4762 return(rc); 4763} 4764 4765enum iflib_ndesc_handler { 4766 IFLIB_NTXD_HANDLER, 4767 IFLIB_NRXD_HANDLER, 4768}; 4769 4770static int 4771mp_ndesc_handler(SYSCTL_HANDLER_ARGS) 4772{ 4773 if_ctx_t ctx = (void *)arg1; 4774 enum iflib_ndesc_handler type = arg2; 4775 char buf[256] = {0}; 4776 uint16_t *ndesc; 4777 char *p, *next; 4778 int nqs, rc, i; 4779 4780 MPASS(type == IFLIB_NTXD_HANDLER || type == IFLIB_NRXD_HANDLER); 4781 4782 nqs = 8; 4783 switch(type) { 4784 case IFLIB_NTXD_HANDLER: 4785 ndesc = ctx->ifc_sysctl_ntxds; 4786 if (ctx->ifc_sctx) 4787 nqs = ctx->ifc_sctx->isc_ntxqs; 4788 break; 4789 case IFLIB_NRXD_HANDLER: 4790 ndesc = ctx->ifc_sysctl_nrxds; 4791 if (ctx->ifc_sctx) 4792 nqs = ctx->ifc_sctx->isc_nrxqs; 4793 break; 4794 } 4795 if (nqs == 0) 4796 nqs = 8; 4797 4798 for (i=0; i<8; i++) { 4799 if (i >= nqs) 4800 break; 4801 if (i) 4802 strcat(buf, ","); 4803 sprintf(strchr(buf, 0), "%d", ndesc[i]); 4804 } 4805 4806 rc = sysctl_handle_string(oidp, buf, sizeof(buf), req); 4807 if (rc || req->newptr == NULL) 4808 return rc; 4809 4810 for (i = 0, next = buf, p = strsep(&next, " ,"); i < 8 && p; 4811 i++, p = strsep(&next, " ,")) { 4812 ndesc[i] = strtoul(p, NULL, 10); 4813 } 4814 4815 return(rc); 4816} 4817 4818#define NAME_BUFLEN 32 4819static void 4820iflib_add_device_sysctl_pre(if_ctx_t ctx) 4821{ 4822 device_t dev = iflib_get_dev(ctx); 4823 struct sysctl_oid_list *child, *oid_list; 4824 struct sysctl_ctx_list *ctx_list; 4825 struct sysctl_oid *node; 4826 4827 ctx_list = device_get_sysctl_ctx(dev); 4828 child = SYSCTL_CHILDREN(device_get_sysctl_tree(dev)); 4829 ctx->ifc_sysctl_node = node = SYSCTL_ADD_NODE(ctx_list, child, OID_AUTO, "iflib", 4830 CTLFLAG_RD, NULL, "IFLIB fields"); 4831 oid_list = SYSCTL_CHILDREN(node); 4832 4833 SYSCTL_ADD_STRING(ctx_list, oid_list, OID_AUTO, "driver_version", 4834 CTLFLAG_RD, ctx->ifc_sctx->isc_driver_version, 0, 4835 "driver version"); 4836 4837 SYSCTL_ADD_U16(ctx_list, oid_list, OID_AUTO, "override_ntxqs", 4838 CTLFLAG_RWTUN, &ctx->ifc_sysctl_ntxqs, 0, 4839 "# of txqs to use, 0 => use default #"); 4840 SYSCTL_ADD_U16(ctx_list, oid_list, OID_AUTO, "override_nrxqs", 4841 CTLFLAG_RWTUN, &ctx->ifc_sysctl_nrxqs, 0, 4842 "# of rxqs to use, 0 => use default #"); 4843 SYSCTL_ADD_U16(ctx_list, oid_list, OID_AUTO, "override_qs_enable", 4844 CTLFLAG_RWTUN, &ctx->ifc_sysctl_qs_eq_override, 0, 4845 "permit #txq != #rxq"); 4846 4847 /* XXX change for per-queue sizes */ 4848 SYSCTL_ADD_PROC(ctx_list, oid_list, OID_AUTO, "override_ntxds", 4849 CTLTYPE_STRING|CTLFLAG_RWTUN, ctx, IFLIB_NTXD_HANDLER, 4850 mp_ndesc_handler, "A", 4851 "list of # of tx descriptors to use, 0 = use default #"); 4852 SYSCTL_ADD_PROC(ctx_list, oid_list, OID_AUTO, "override_nrxds", 4853 CTLTYPE_STRING|CTLFLAG_RWTUN, ctx, IFLIB_NRXD_HANDLER, 4854 mp_ndesc_handler, "A", 4855 "list of # of rx descriptors to use, 0 = use default #"); 4856} 4857 4858static void 4859iflib_add_device_sysctl_post(if_ctx_t ctx) 4860{ 4861 if_shared_ctx_t sctx = ctx->ifc_sctx; 4862 if_softc_ctx_t scctx = &ctx->ifc_softc_ctx; 4863 device_t dev = iflib_get_dev(ctx); 4864 struct sysctl_oid_list *child; 4865 struct sysctl_ctx_list *ctx_list; 4866 iflib_fl_t fl; 4867 iflib_txq_t txq; 4868 iflib_rxq_t rxq; 4869 int i, j; 4870 char namebuf[NAME_BUFLEN]; 4871 char *qfmt; 4872 struct sysctl_oid *queue_node, *fl_node, *node; 4873 struct sysctl_oid_list *queue_list, *fl_list; 4874 ctx_list = device_get_sysctl_ctx(dev); 4875 4876 node = ctx->ifc_sysctl_node; 4877 child = SYSCTL_CHILDREN(node); 4878 4879 if (scctx->isc_ntxqsets > 100) 4880 qfmt = "txq%03d"; 4881 else if (scctx->isc_ntxqsets > 10) 4882 qfmt = "txq%02d"; 4883 else 4884 qfmt = "txq%d"; 4885 for (i = 0, txq = ctx->ifc_txqs; i < scctx->isc_ntxqsets; i++, txq++) { 4886 snprintf(namebuf, NAME_BUFLEN, qfmt, i); 4887 queue_node = SYSCTL_ADD_NODE(ctx_list, child, OID_AUTO, namebuf, 4888 CTLFLAG_RD, NULL, "Queue Name"); 4889 queue_list = SYSCTL_CHILDREN(queue_node); 4890#if MEMORY_LOGGING 4891 SYSCTL_ADD_QUAD(ctx_list, queue_list, OID_AUTO, "txq_dequeued", 4892 CTLFLAG_RD, 4893 &txq->ift_dequeued, "total mbufs freed"); 4894 SYSCTL_ADD_QUAD(ctx_list, queue_list, OID_AUTO, "txq_enqueued", 4895 CTLFLAG_RD, 4896 &txq->ift_enqueued, "total mbufs enqueued"); 4897#endif 4898 SYSCTL_ADD_QUAD(ctx_list, queue_list, OID_AUTO, "mbuf_defrag", 4899 CTLFLAG_RD, 4900 &txq->ift_mbuf_defrag, "# of times m_defrag was called"); 4901 SYSCTL_ADD_QUAD(ctx_list, queue_list, OID_AUTO, "m_pullups", 4902 CTLFLAG_RD, 4903 &txq->ift_pullups, "# of times m_pullup was called"); 4904 SYSCTL_ADD_QUAD(ctx_list, queue_list, OID_AUTO, "mbuf_defrag_failed", 4905 CTLFLAG_RD, 4906 &txq->ift_mbuf_defrag_failed, "# of times m_defrag failed"); 4907 SYSCTL_ADD_QUAD(ctx_list, queue_list, OID_AUTO, "no_desc_avail", 4908 CTLFLAG_RD, 4909 &txq->ift_no_desc_avail, "# of times no descriptors were available"); 4910 SYSCTL_ADD_QUAD(ctx_list, queue_list, OID_AUTO, "tx_map_failed", 4911 CTLFLAG_RD, 4912 &txq->ift_map_failed, "# of times dma map failed"); 4913 SYSCTL_ADD_QUAD(ctx_list, queue_list, OID_AUTO, "txd_encap_efbig", 4914 CTLFLAG_RD, 4915 &txq->ift_txd_encap_efbig, "# of times txd_encap returned EFBIG"); 4916 SYSCTL_ADD_QUAD(ctx_list, queue_list, OID_AUTO, "no_tx_dma_setup", 4917 CTLFLAG_RD, 4918 &txq->ift_no_tx_dma_setup, "# of times map failed for other than EFBIG"); 4919 SYSCTL_ADD_U16(ctx_list, queue_list, OID_AUTO, "txq_pidx", 4920 CTLFLAG_RD, 4921 &txq->ift_pidx, 1, "Producer Index"); 4922 SYSCTL_ADD_U16(ctx_list, queue_list, OID_AUTO, "txq_cidx", 4923 CTLFLAG_RD, 4924 &txq->ift_cidx, 1, "Consumer Index"); 4925 SYSCTL_ADD_U16(ctx_list, queue_list, OID_AUTO, "txq_cidx_processed", 4926 CTLFLAG_RD, 4927 &txq->ift_cidx_processed, 1, "Consumer Index seen by credit update"); 4928 SYSCTL_ADD_U16(ctx_list, queue_list, OID_AUTO, "txq_in_use", 4929 CTLFLAG_RD, 4930 &txq->ift_in_use, 1, "descriptors in use"); 4931 SYSCTL_ADD_QUAD(ctx_list, queue_list, OID_AUTO, "txq_processed", 4932 CTLFLAG_RD, 4933 &txq->ift_processed, "descriptors procesed for clean"); 4934 SYSCTL_ADD_QUAD(ctx_list, queue_list, OID_AUTO, "txq_cleaned", 4935 CTLFLAG_RD, 4936 &txq->ift_cleaned, "total cleaned"); 4937 SYSCTL_ADD_PROC(ctx_list, queue_list, OID_AUTO, "ring_state", 4938 CTLTYPE_STRING | CTLFLAG_RD, __DEVOLATILE(uint64_t *, &txq->ift_br[0]->state), 4939 0, mp_ring_state_handler, "A", "soft ring state"); 4940 SYSCTL_ADD_COUNTER_U64(ctx_list, queue_list, OID_AUTO, "r_enqueues", 4941 CTLFLAG_RD, &txq->ift_br[0]->enqueues, 4942 "# of enqueues to the mp_ring for this queue"); 4943 SYSCTL_ADD_COUNTER_U64(ctx_list, queue_list, OID_AUTO, "r_drops", 4944 CTLFLAG_RD, &txq->ift_br[0]->drops, 4945 "# of drops in the mp_ring for this queue"); 4946 SYSCTL_ADD_COUNTER_U64(ctx_list, queue_list, OID_AUTO, "r_starts", 4947 CTLFLAG_RD, &txq->ift_br[0]->starts, 4948 "# of normal consumer starts in the mp_ring for this queue"); 4949 SYSCTL_ADD_COUNTER_U64(ctx_list, queue_list, OID_AUTO, "r_stalls", 4950 CTLFLAG_RD, &txq->ift_br[0]->stalls, 4951 "# of consumer stalls in the mp_ring for this queue"); 4952 SYSCTL_ADD_COUNTER_U64(ctx_list, queue_list, OID_AUTO, "r_restarts", 4953 CTLFLAG_RD, &txq->ift_br[0]->restarts, 4954 "# of consumer restarts in the mp_ring for this queue"); 4955 SYSCTL_ADD_COUNTER_U64(ctx_list, queue_list, OID_AUTO, "r_abdications", 4956 CTLFLAG_RD, &txq->ift_br[0]->abdications, 4957 "# of consumer abdications in the mp_ring for this queue"); 4958 4959 } 4960 4961 if (scctx->isc_nrxqsets > 100) 4962 qfmt = "rxq%03d"; 4963 else if (scctx->isc_nrxqsets > 10) 4964 qfmt = "rxq%02d"; 4965 else 4966 qfmt = "rxq%d"; 4967 for (i = 0, rxq = ctx->ifc_rxqs; i < scctx->isc_nrxqsets; i++, rxq++) { 4968 snprintf(namebuf, NAME_BUFLEN, qfmt, i); 4969 queue_node = SYSCTL_ADD_NODE(ctx_list, child, OID_AUTO, namebuf, 4970 CTLFLAG_RD, NULL, "Queue Name"); 4971 queue_list = SYSCTL_CHILDREN(queue_node); 4972 if (sctx->isc_flags & IFLIB_HAS_RXCQ) { 4973 SYSCTL_ADD_U16(ctx_list, queue_list, OID_AUTO, "rxq_cq_pidx", 4974 CTLFLAG_RD, 4975 &rxq->ifr_cq_pidx, 1, "Producer Index"); 4976 SYSCTL_ADD_U16(ctx_list, queue_list, OID_AUTO, "rxq_cq_cidx", 4977 CTLFLAG_RD, 4978 &rxq->ifr_cq_cidx, 1, "Consumer Index"); 4979 } 4980 for (j = 0, fl = rxq->ifr_fl; j < rxq->ifr_nfl; j++, fl++) { 4981 snprintf(namebuf, NAME_BUFLEN, "rxq_fl%d", j); 4982 fl_node = SYSCTL_ADD_NODE(ctx_list, queue_list, OID_AUTO, namebuf, 4983 CTLFLAG_RD, NULL, "freelist Name"); 4984 fl_list = SYSCTL_CHILDREN(fl_node); 4985 SYSCTL_ADD_U16(ctx_list, fl_list, OID_AUTO, "pidx", 4986 CTLFLAG_RD, 4987 &fl->ifl_pidx, 1, "Producer Index"); 4988 SYSCTL_ADD_U16(ctx_list, fl_list, OID_AUTO, "cidx", 4989 CTLFLAG_RD, 4990 &fl->ifl_cidx, 1, "Consumer Index"); 4991 SYSCTL_ADD_U16(ctx_list, fl_list, OID_AUTO, "credits", 4992 CTLFLAG_RD, 4993 &fl->ifl_credits, 1, "credits available"); 4994#if MEMORY_LOGGING 4995 SYSCTL_ADD_QUAD(ctx_list, fl_list, OID_AUTO, "fl_m_enqueued", 4996 CTLFLAG_RD, 4997 &fl->ifl_m_enqueued, "mbufs allocated"); 4998 SYSCTL_ADD_QUAD(ctx_list, fl_list, OID_AUTO, "fl_m_dequeued", 4999 CTLFLAG_RD, 5000 &fl->ifl_m_dequeued, "mbufs freed"); 5001 SYSCTL_ADD_QUAD(ctx_list, fl_list, OID_AUTO, "fl_cl_enqueued", 5002 CTLFLAG_RD, 5003 &fl->ifl_cl_enqueued, "clusters allocated"); 5004 SYSCTL_ADD_QUAD(ctx_list, fl_list, OID_AUTO, "fl_cl_dequeued", 5005 CTLFLAG_RD, 5006 &fl->ifl_cl_dequeued, "clusters freed"); 5007#endif 5008 5009 } 5010 } 5011 5012} 5013