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("$FreeBSD$"); 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 53 54 #include <net/if.h> 55 #include <net/if_var.h> 56 #include <net/if_types.h> 57 #include <net/if_media.h> 58 #include <net/bpf.h> 59 #include <net/ethernet.h> 60 #include <net/mp_ring.h> 61 62 #include <netinet/in.h> 63 #include <netinet/in_pcb.h> 64 #include <netinet/tcp_lro.h> 65 #include <netinet/in_systm.h> 66 #include <netinet/if_ether.h> 67 #include <netinet/ip.h> 68 #include <netinet/ip6.h> 69 #include <netinet/tcp.h> 70 71 #include <machine/bus.h> 72 #include <machine/in_cksum.h> 73 74 #include <vm/vm.h> 75 #include <vm/pmap.h> 76 77 #include <dev/led/led.h> 78 #include <dev/pci/pcireg.h> 79 #include <dev/pci/pcivar.h> 80 #include <dev/pci/pci_private.h> 81 82 #include <net/iflib.h> 83 84 #include "ifdi_if.h" 85 86 #if defined(__i386__) || defined(__amd64__) 87 #include <sys/memdesc.h> 88 #include <machine/bus.h> 89 #include <machine/md_var.h> 90 #include <machine/specialreg.h> 91 #include <x86/include/busdma_impl.h> 92 #include <x86/iommu/busdma_dmar.h> 93 #endif 94 95 96 /* 97 * enable accounting of every mbuf as it comes in to and goes out of iflib's software descriptor references 98 */ 99 #define MEMORY_LOGGING 0 100 /* 101 * Enable mbuf vectors for compressing long mbuf chains 102 */ 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 */ 128 static MALLOC_DEFINE(M_IFLIB, "iflib", "ifnet library"); 129 130 struct iflib_txq; 131 typedef struct iflib_txq *iflib_txq_t; 132 struct iflib_rxq; 133 typedef struct iflib_rxq *iflib_rxq_t; 134 struct iflib_fl; 135 typedef struct iflib_fl *iflib_fl_t; 136 137 typedef 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; 142 143 struct 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_ntxds; 185 uint16_t ifc_sysctl_nrxds; 186 struct if_txrx ifc_txrx; 187 #define isc_txd_encap ifc_txrx.ift_txd_encap 188 #define isc_txd_flush ifc_txrx.ift_txd_flush 189 #define isc_txd_credits_update ifc_txrx.ift_txd_credits_update 190 #define isc_rxd_available ifc_txrx.ift_rxd_available 191 #define isc_rxd_pkt_get ifc_txrx.ift_rxd_pkt_get 192 #define isc_rxd_refill ifc_txrx.ift_rxd_refill 193 #define isc_rxd_flush ifc_txrx.ift_rxd_flush 194 #define isc_rxd_refill ifc_txrx.ift_rxd_refill 195 #define isc_rxd_refill ifc_txrx.ift_rxd_refill 196 #define isc_legacy_intr ifc_txrx.ift_legacy_intr 197 eventhandler_tag ifc_vlan_attach_event; 198 eventhandler_tag ifc_vlan_detach_event; 199 uint8_t ifc_mac[ETHER_ADDR_LEN]; 200 char ifc_mtx_name[16]; 201 }; 202 203 204 void * 205 iflib_get_softc(if_ctx_t ctx) 206 { 207 208 return (ctx->ifc_softc); 209 } 210 211 device_t 212 iflib_get_dev(if_ctx_t ctx) 213 { 214 215 return (ctx->ifc_dev); 216 } 217 218 if_t 219 iflib_get_ifp(if_ctx_t ctx) 220 { 221 222 return (ctx->ifc_ifp); 223 } 224 225 struct ifmedia * 226 iflib_get_media(if_ctx_t ctx) 227 { 228 229 return (&ctx->ifc_media); 230 } 231 232 void 233 iflib_set_mac(if_ctx_t ctx, uint8_t mac[ETHER_ADDR_LEN]) 234 { 235 236 bcopy(mac, ctx->ifc_mac, ETHER_ADDR_LEN); 237 } 238 239 if_softc_ctx_t 240 iflib_get_softc_ctx(if_ctx_t ctx) 241 { 242 243 return (&ctx->ifc_softc_ctx); 244 } 245 246 if_shared_ctx_t 247 iflib_get_sctx(if_ctx_t ctx) 248 { 249 250 return (ctx->ifc_sctx); 251 } 252 253 #define CACHE_PTR_INCREMENT (CACHE_LINE_SIZE/sizeof(void*)) 254 255 #define LINK_ACTIVE(ctx) ((ctx)->ifc_link_state == LINK_STATE_UP) 256 #define CTX_IS_VF(ctx) ((ctx)->ifc_sctx->isc_flags & IFLIB_IS_VF) 257 258 #define RX_SW_DESC_MAP_CREATED (1 << 0) 259 #define TX_SW_DESC_MAP_CREATED (1 << 1) 260 #define RX_SW_DESC_INUSE (1 << 3) 261 #define TX_SW_DESC_MAPPED (1 << 4) 262 263 typedef struct iflib_sw_rx_desc { 264 bus_dmamap_t ifsd_map; /* bus_dma map for packet */ 265 struct mbuf *ifsd_m; /* rx: uninitialized mbuf */ 266 caddr_t ifsd_cl; /* direct cluster pointer for rx */ 267 uint16_t ifsd_flags; 268 } *iflib_rxsd_t; 269 270 typedef struct iflib_sw_tx_desc_val { 271 bus_dmamap_t ifsd_map; /* bus_dma map for packet */ 272 struct mbuf *ifsd_m; /* pkthdr mbuf */ 273 uint8_t ifsd_flags; 274 } *iflib_txsd_val_t; 275 276 typedef struct iflib_sw_tx_desc_array { 277 bus_dmamap_t *ifsd_map; /* bus_dma maps for packet */ 278 struct mbuf **ifsd_m; /* pkthdr mbufs */ 279 uint8_t *ifsd_flags; 280 } iflib_txsd_array_t; 281 282 283 /* magic number that should be high enough for any hardware */ 284 #define IFLIB_MAX_TX_SEGS 128 285 #define IFLIB_MAX_RX_SEGS 32 286 #define IFLIB_RX_COPY_THRESH 128 287 #define IFLIB_MAX_RX_REFRESH 32 288 #define IFLIB_QUEUE_IDLE 0 289 #define IFLIB_QUEUE_HUNG 1 290 #define IFLIB_QUEUE_WORKING 2 291 292 /* this should really scale with ring size - 32 is a fairly arbitrary value for this */ 293 #define TX_BATCH_SIZE 16 294 295 #define IFLIB_RESTART_BUDGET 8 296 297 #define IFC_LEGACY 0x1 298 #define IFC_QFLUSH 0x2 299 #define IFC_MULTISEG 0x4 300 #define IFC_DMAR 0x8 301 302 #define CSUM_OFFLOAD (CSUM_IP_TSO|CSUM_IP6_TSO|CSUM_IP| \ 303 CSUM_IP_UDP|CSUM_IP_TCP|CSUM_IP_SCTP| \ 304 CSUM_IP6_UDP|CSUM_IP6_TCP|CSUM_IP6_SCTP) 305 struct iflib_txq { 306 uint16_t ift_in_use; 307 uint16_t ift_cidx; 308 uint16_t ift_cidx_processed; 309 uint16_t ift_pidx; 310 uint8_t ift_gen; 311 uint8_t ift_db_pending; 312 uint8_t ift_db_pending_queued; 313 uint8_t ift_npending; 314 /* implicit pad */ 315 uint64_t ift_processed; 316 uint64_t ift_cleaned; 317 #if MEMORY_LOGGING 318 uint64_t ift_enqueued; 319 uint64_t ift_dequeued; 320 #endif 321 uint64_t ift_no_tx_dma_setup; 322 uint64_t ift_no_desc_avail; 323 uint64_t ift_mbuf_defrag_failed; 324 uint64_t ift_mbuf_defrag; 325 uint64_t ift_map_failed; 326 uint64_t ift_txd_encap_efbig; 327 uint64_t ift_pullups; 328 329 struct mtx ift_mtx; 330 struct mtx ift_db_mtx; 331 332 /* constant values */ 333 if_ctx_t ift_ctx; 334 struct ifmp_ring **ift_br; 335 struct grouptask ift_task; 336 uint16_t ift_size; 337 uint16_t ift_id; 338 struct callout ift_timer; 339 struct callout ift_db_check; 340 341 iflib_txsd_array_t ift_sds; 342 uint8_t ift_nbr; 343 uint8_t ift_qstatus; 344 uint8_t ift_active; 345 uint8_t ift_closed; 346 int ift_watchdog_time; 347 struct iflib_filter_info ift_filter_info; 348 bus_dma_tag_t ift_desc_tag; 349 bus_dma_tag_t ift_tso_desc_tag; 350 iflib_dma_info_t ift_ifdi; 351 #define MTX_NAME_LEN 16 352 char ift_mtx_name[MTX_NAME_LEN]; 353 char ift_db_mtx_name[MTX_NAME_LEN]; 354 bus_dma_segment_t ift_segs[IFLIB_MAX_TX_SEGS] __aligned(CACHE_LINE_SIZE); 355 } __aligned(CACHE_LINE_SIZE); 356 357 struct iflib_fl { 358 uint16_t ifl_cidx; 359 uint16_t ifl_pidx; 360 uint16_t ifl_credits; 361 uint8_t ifl_gen; 362 #if MEMORY_LOGGING 363 uint64_t ifl_m_enqueued; 364 uint64_t ifl_m_dequeued; 365 uint64_t ifl_cl_enqueued; 366 uint64_t ifl_cl_dequeued; 367 #endif 368 /* implicit pad */ 369 370 /* constant */ 371 uint16_t ifl_size; 372 uint16_t ifl_buf_size; 373 uint16_t ifl_cltype; 374 uma_zone_t ifl_zone; 375 iflib_rxsd_t ifl_sds; 376 iflib_rxq_t ifl_rxq; 377 uint8_t ifl_id; 378 bus_dma_tag_t ifl_desc_tag; 379 iflib_dma_info_t ifl_ifdi; 380 uint64_t ifl_bus_addrs[IFLIB_MAX_RX_REFRESH] __aligned(CACHE_LINE_SIZE); 381 caddr_t ifl_vm_addrs[IFLIB_MAX_RX_REFRESH]; 382 } __aligned(CACHE_LINE_SIZE); 383 384 static inline int 385 get_inuse(int size, int cidx, int pidx, int gen) 386 { 387 int used; 388 389 if (pidx > cidx) 390 used = pidx - cidx; 391 else if (pidx < cidx) 392 used = size - cidx + pidx; 393 else if (gen == 0 && pidx == cidx) 394 used = 0; 395 else if (gen == 1 && pidx == cidx) 396 used = size; 397 else 398 panic("bad state"); 399 400 return (used); 401 } 402 403 #define TXQ_AVAIL(txq) (txq->ift_size - get_inuse(txq->ift_size, txq->ift_cidx, txq->ift_pidx, txq->ift_gen)) 404 405 #define IDXDIFF(head, tail, wrap) \ 406 ((head) >= (tail) ? (head) - (tail) : (wrap) - (tail) + (head)) 407 408 struct iflib_rxq { 409 /* If there is a separate completion queue - 410 * these are the cq cidx and pidx. Otherwise 411 * these are unused. 412 */ 413 uint16_t ifr_size; 414 uint16_t ifr_cq_cidx; 415 uint16_t ifr_cq_pidx; 416 uint8_t ifr_cq_gen; 417 418 if_ctx_t ifr_ctx; 419 iflib_fl_t ifr_fl; 420 uint64_t ifr_rx_irq; 421 uint16_t ifr_id; 422 uint8_t ifr_lro_enabled; 423 uint8_t ifr_nfl; 424 struct lro_ctrl ifr_lc; 425 struct grouptask ifr_task; 426 struct iflib_filter_info ifr_filter_info; 427 iflib_dma_info_t ifr_ifdi; 428 /* dynamically allocate if any drivers need a value substantially larger than this */ 429 struct if_rxd_frag ifr_frags[IFLIB_MAX_RX_SEGS] __aligned(CACHE_LINE_SIZE); 430 } __aligned(CACHE_LINE_SIZE); 431 432 /* 433 * Only allow a single packet to take up most 1/nth of the tx ring 434 */ 435 #define MAX_SINGLE_PACKET_FRACTION 12 436 #define IF_BAD_DMA (bus_addr_t)-1 437 438 static int enable_msix = 1; 439 440 #define mtx_held(m) (((m)->mtx_lock & ~MTX_FLAGMASK) != (uintptr_t)0) 441 442 443 444 #define CTX_ACTIVE(ctx) ((if_getdrvflags((ctx)->ifc_ifp) & IFF_DRV_RUNNING)) 445 446 #define CTX_LOCK_INIT(_sc, _name) mtx_init(&(_sc)->ifc_mtx, _name, "iflib ctx lock", MTX_DEF) 447 448 #define CTX_LOCK(ctx) mtx_lock(&(ctx)->ifc_mtx) 449 #define CTX_UNLOCK(ctx) mtx_unlock(&(ctx)->ifc_mtx) 450 #define CTX_LOCK_DESTROY(ctx) mtx_destroy(&(ctx)->ifc_mtx) 451 452 453 #define TXDB_LOCK_INIT(txq) mtx_init(&(txq)->ift_db_mtx, (txq)->ift_db_mtx_name, NULL, MTX_DEF) 454 #define TXDB_TRYLOCK(txq) mtx_trylock(&(txq)->ift_db_mtx) 455 #define TXDB_LOCK(txq) mtx_lock(&(txq)->ift_db_mtx) 456 #define TXDB_UNLOCK(txq) mtx_unlock(&(txq)->ift_db_mtx) 457 #define TXDB_LOCK_DESTROY(txq) mtx_destroy(&(txq)->ift_db_mtx) 458 459 #define CALLOUT_LOCK(txq) mtx_lock(&txq->ift_mtx) 460 #define CALLOUT_UNLOCK(txq) mtx_unlock(&txq->ift_mtx) 461 462 463 /* Our boot-time initialization hook */ 464 static int iflib_module_event_handler(module_t, int, void *); 465 466 static moduledata_t iflib_moduledata = { 467 "iflib", 468 iflib_module_event_handler, 469 NULL 470 }; 471 472 DECLARE_MODULE(iflib, iflib_moduledata, SI_SUB_INIT_IF, SI_ORDER_ANY); 473 MODULE_VERSION(iflib, 1); 474 475 MODULE_DEPEND(iflib, pci, 1, 1, 1); 476 MODULE_DEPEND(iflib, ether, 1, 1, 1); 477 478 TASKQGROUP_DEFINE(if_io_tqg, mp_ncpus, 1); 479 TASKQGROUP_DEFINE(if_config_tqg, 1, 1); 480 481 #ifndef IFLIB_DEBUG_COUNTERS 482 #ifdef INVARIANTS 483 #define IFLIB_DEBUG_COUNTERS 1 484 #else 485 #define IFLIB_DEBUG_COUNTERS 0 486 #endif /* !INVARIANTS */ 487 #endif 488 489 static SYSCTL_NODE(_net, OID_AUTO, iflib, CTLFLAG_RD, 0, 490 "iflib driver parameters"); 491 492 /* 493 * XXX need to ensure that this can't accidentally cause the head to be moved backwards 494 */ 495 static int iflib_min_tx_latency = 0; 496 497 SYSCTL_INT(_net_iflib, OID_AUTO, min_tx_latency, CTLFLAG_RW, 498 &iflib_min_tx_latency, 0, "minimize transmit latency at the possibel expense of throughput"); 499 500 501 #if IFLIB_DEBUG_COUNTERS 502 503 static int iflib_tx_seen; 504 static int iflib_tx_sent; 505 static int iflib_tx_encap; 506 static int iflib_rx_allocs; 507 static int iflib_fl_refills; 508 static int iflib_fl_refills_large; 509 static int iflib_tx_frees; 510 511 SYSCTL_INT(_net_iflib, OID_AUTO, tx_seen, CTLFLAG_RD, 512 &iflib_tx_seen, 0, "# tx mbufs seen"); 513 SYSCTL_INT(_net_iflib, OID_AUTO, tx_sent, CTLFLAG_RD, 514 &iflib_tx_sent, 0, "# tx mbufs sent"); 515 SYSCTL_INT(_net_iflib, OID_AUTO, tx_encap, CTLFLAG_RD, 516 &iflib_tx_encap, 0, "# tx mbufs encapped"); 517 SYSCTL_INT(_net_iflib, OID_AUTO, tx_frees, CTLFLAG_RD, 518 &iflib_tx_frees, 0, "# tx frees"); 519 SYSCTL_INT(_net_iflib, OID_AUTO, rx_allocs, CTLFLAG_RD, 520 &iflib_rx_allocs, 0, "# rx allocations"); 521 SYSCTL_INT(_net_iflib, OID_AUTO, fl_refills, CTLFLAG_RD, 522 &iflib_fl_refills, 0, "# refills"); 523 SYSCTL_INT(_net_iflib, OID_AUTO, fl_refills_large, CTLFLAG_RD, 524 &iflib_fl_refills_large, 0, "# large refills"); 525 526 527 static int iflib_txq_drain_flushing; 528 static int iflib_txq_drain_oactive; 529 static int iflib_txq_drain_notready; 530 static int iflib_txq_drain_encapfail; 531 532 SYSCTL_INT(_net_iflib, OID_AUTO, txq_drain_flushing, CTLFLAG_RD, 533 &iflib_txq_drain_flushing, 0, "# drain flushes"); 534 SYSCTL_INT(_net_iflib, OID_AUTO, txq_drain_oactive, CTLFLAG_RD, 535 &iflib_txq_drain_oactive, 0, "# drain oactives"); 536 SYSCTL_INT(_net_iflib, OID_AUTO, txq_drain_notready, CTLFLAG_RD, 537 &iflib_txq_drain_notready, 0, "# drain notready"); 538 SYSCTL_INT(_net_iflib, OID_AUTO, txq_drain_encapfail, CTLFLAG_RD, 539 &iflib_txq_drain_encapfail, 0, "# drain encap fails"); 540 541 542 static int iflib_encap_load_mbuf_fail; 543 static int iflib_encap_txq_avail_fail; 544 static int iflib_encap_txd_encap_fail; 545 546 SYSCTL_INT(_net_iflib, OID_AUTO, encap_load_mbuf_fail, CTLFLAG_RD, 547 &iflib_encap_load_mbuf_fail, 0, "# busdma load failures"); 548 SYSCTL_INT(_net_iflib, OID_AUTO, encap_txq_avail_fail, CTLFLAG_RD, 549 &iflib_encap_txq_avail_fail, 0, "# txq avail failures"); 550 SYSCTL_INT(_net_iflib, OID_AUTO, encap_txd_encap_fail, CTLFLAG_RD, 551 &iflib_encap_txd_encap_fail, 0, "# driver encap failures"); 552 553 static int iflib_task_fn_rxs; 554 static int iflib_rx_intr_enables; 555 static int iflib_fast_intrs; 556 static int iflib_intr_link; 557 static int iflib_intr_msix; 558 static int iflib_rx_unavail; 559 static int iflib_rx_ctx_inactive; 560 static int iflib_rx_zero_len; 561 static int iflib_rx_if_input; 562 static int iflib_rx_mbuf_null; 563 static int iflib_rxd_flush; 564 565 static int iflib_verbose_debug; 566 567 SYSCTL_INT(_net_iflib, OID_AUTO, intr_link, CTLFLAG_RD, 568 &iflib_intr_link, 0, "# intr link calls"); 569 SYSCTL_INT(_net_iflib, OID_AUTO, intr_msix, CTLFLAG_RD, 570 &iflib_intr_msix, 0, "# intr msix calls"); 571 SYSCTL_INT(_net_iflib, OID_AUTO, task_fn_rx, CTLFLAG_RD, 572 &iflib_task_fn_rxs, 0, "# task_fn_rx calls"); 573 SYSCTL_INT(_net_iflib, OID_AUTO, rx_intr_enables, CTLFLAG_RD, 574 &iflib_rx_intr_enables, 0, "# rx intr enables"); 575 SYSCTL_INT(_net_iflib, OID_AUTO, fast_intrs, CTLFLAG_RD, 576 &iflib_fast_intrs, 0, "# fast_intr calls"); 577 SYSCTL_INT(_net_iflib, OID_AUTO, rx_unavail, CTLFLAG_RD, 578 &iflib_rx_unavail, 0, "# times rxeof called with no available data"); 579 SYSCTL_INT(_net_iflib, OID_AUTO, rx_ctx_inactive, CTLFLAG_RD, 580 &iflib_rx_ctx_inactive, 0, "# times rxeof called with inactive context"); 581 SYSCTL_INT(_net_iflib, OID_AUTO, rx_zero_len, CTLFLAG_RD, 582 &iflib_rx_zero_len, 0, "# times rxeof saw zero len mbuf"); 583 SYSCTL_INT(_net_iflib, OID_AUTO, rx_if_input, CTLFLAG_RD, 584 &iflib_rx_if_input, 0, "# times rxeof called if_input"); 585 SYSCTL_INT(_net_iflib, OID_AUTO, rx_mbuf_null, CTLFLAG_RD, 586 &iflib_rx_mbuf_null, 0, "# times rxeof got null mbuf"); 587 SYSCTL_INT(_net_iflib, OID_AUTO, rxd_flush, CTLFLAG_RD, 588 &iflib_rxd_flush, 0, "# times rxd_flush called"); 589 SYSCTL_INT(_net_iflib, OID_AUTO, verbose_debug, CTLFLAG_RW, 590 &iflib_verbose_debug, 0, "enable verbose debugging"); 591 592 #define DBG_COUNTER_INC(name) atomic_add_int(&(iflib_ ## name), 1) 593 594 #else 595 #define DBG_COUNTER_INC(name) 596 597 #endif 598 599 600 601 #define IFLIB_DEBUG 0 602 603 static void iflib_tx_structures_free(if_ctx_t ctx); 604 static void iflib_rx_structures_free(if_ctx_t ctx); 605 static int iflib_queues_alloc(if_ctx_t ctx); 606 static int iflib_tx_credits_update(if_ctx_t ctx, iflib_txq_t txq); 607 static int iflib_rxd_avail(if_ctx_t ctx, iflib_rxq_t rxq, int cidx); 608 static int iflib_qset_structures_setup(if_ctx_t ctx); 609 static int iflib_msix_init(if_ctx_t ctx); 610 static int iflib_legacy_setup(if_ctx_t ctx, driver_filter_t filter, void *filterarg, int *rid, char *str); 611 static void iflib_txq_check_drain(iflib_txq_t txq, int budget); 612 static uint32_t iflib_txq_can_drain(struct ifmp_ring *); 613 static int iflib_register(if_ctx_t); 614 static void iflib_init_locked(if_ctx_t ctx); 615 static void iflib_add_device_sysctl_pre(if_ctx_t ctx); 616 static void iflib_add_device_sysctl_post(if_ctx_t ctx); 617 618 619 #ifdef DEV_NETMAP 620 #include <sys/selinfo.h> 621 #include <net/netmap.h> 622 #include <dev/netmap/netmap_kern.h> 623 624 MODULE_DEPEND(iflib, netmap, 1, 1, 1); 625 626 /* 627 * device-specific sysctl variables: 628 * 629 * ixl_crcstrip: 0: keep CRC in rx frames (default), 1: strip it. 630 * During regular operations the CRC is stripped, but on some 631 * hardware reception of frames not multiple of 64 is slower, 632 * so using crcstrip=0 helps in benchmarks. 633 * 634 * ixl_rx_miss, ixl_rx_miss_bufs: 635 * count packets that might be missed due to lost interrupts. 636 */ 637 SYSCTL_DECL(_dev_netmap); 638 /* 639 * The xl driver by default strips CRCs and we do not override it. 640 */ 641 642 int iflib_crcstrip = 1; 643 SYSCTL_INT(_dev_netmap, OID_AUTO, iflib_crcstrip, 644 CTLFLAG_RW, &iflib_crcstrip, 1, "strip CRC on rx frames"); 645 646 int iflib_rx_miss, iflib_rx_miss_bufs; 647 SYSCTL_INT(_dev_netmap, OID_AUTO, iflib_rx_miss, 648 CTLFLAG_RW, &iflib_rx_miss, 0, "potentially missed rx intr"); 649 SYSCTL_INT(_dev_netmap, OID_AUTO, ixl_rx_miss_bufs, 650 CTLFLAG_RW, &iflib_rx_miss_bufs, 0, "potentially missed rx intr bufs"); 651 652 /* 653 * Register/unregister. We are already under netmap lock. 654 * Only called on the first register or the last unregister. 655 */ 656 static int 657 iflib_netmap_register(struct netmap_adapter *na, int onoff) 658 { 659 struct ifnet *ifp = na->ifp; 660 if_ctx_t ctx = ifp->if_softc; 661 662 CTX_LOCK(ctx); 663 IFDI_INTR_DISABLE(ctx); 664 665 /* Tell the stack that the interface is no longer active */ 666 ifp->if_drv_flags &= ~(IFF_DRV_RUNNING | IFF_DRV_OACTIVE); 667 668 if (!CTX_IS_VF(ctx)) 669 IFDI_CRCSTRIP_SET(ctx, onoff); 670 671 /* enable or disable flags and callbacks in na and ifp */ 672 if (onoff) { 673 nm_set_native_flags(na); 674 } else { 675 nm_clear_native_flags(na); 676 } 677 IFDI_INIT(ctx); 678 IFDI_CRCSTRIP_SET(ctx, onoff); // XXX why twice ? 679 CTX_UNLOCK(ctx); 680 return (ifp->if_drv_flags & IFF_DRV_RUNNING ? 0 : 1); 681 } 682 683 /* 684 * Reconcile kernel and user view of the transmit ring. 685 * 686 * All information is in the kring. 687 * Userspace wants to send packets up to the one before kring->rhead, 688 * kernel knows kring->nr_hwcur is the first unsent packet. 689 * 690 * Here we push packets out (as many as possible), and possibly 691 * reclaim buffers from previously completed transmission. 692 * 693 * The caller (netmap) guarantees that there is only one instance 694 * running at any time. Any interference with other driver 695 * methods should be handled by the individual drivers. 696 */ 697 static int 698 iflib_netmap_txsync(struct netmap_kring *kring, int flags) 699 { 700 struct netmap_adapter *na = kring->na; 701 struct ifnet *ifp = na->ifp; 702 struct netmap_ring *ring = kring->ring; 703 u_int nm_i; /* index into the netmap ring */ 704 u_int nic_i; /* index into the NIC ring */ 705 u_int n; 706 u_int const lim = kring->nkr_num_slots - 1; 707 u_int const head = kring->rhead; 708 struct if_pkt_info pi; 709 710 /* 711 * interrupts on every tx packet are expensive so request 712 * them every half ring, or where NS_REPORT is set 713 */ 714 u_int report_frequency = kring->nkr_num_slots >> 1; 715 /* device-specific */ 716 if_ctx_t ctx = ifp->if_softc; 717 iflib_txq_t txq = &ctx->ifc_txqs[kring->ring_id]; 718 719 pi.ipi_segs = txq->ift_segs; 720 pi.ipi_qsidx = kring->ring_id; 721 pi.ipi_ndescs = 0; 722 723 bus_dmamap_sync(txq->ift_desc_tag, txq->ift_ifdi->idi_map, 724 BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE); 725 726 727 /* 728 * First part: process new packets to send. 729 * nm_i is the current index in the netmap ring, 730 * nic_i is the corresponding index in the NIC ring. 731 * 732 * If we have packets to send (nm_i != head) 733 * iterate over the netmap ring, fetch length and update 734 * the corresponding slot in the NIC ring. Some drivers also 735 * need to update the buffer's physical address in the NIC slot 736 * even NS_BUF_CHANGED is not set (PNMB computes the addresses). 737 * 738 * The netmap_reload_map() calls is especially expensive, 739 * even when (as in this case) the tag is 0, so do only 740 * when the buffer has actually changed. 741 * 742 * If possible do not set the report/intr bit on all slots, 743 * but only a few times per ring or when NS_REPORT is set. 744 * 745 * Finally, on 10G and faster drivers, it might be useful 746 * to prefetch the next slot and txr entry. 747 */ 748 749 nm_i = kring->nr_hwcur; 750 if (nm_i != head) { /* we have new packets to send */ 751 nic_i = netmap_idx_k2n(kring, nm_i); 752 753 __builtin_prefetch(&ring->slot[nm_i]); 754 __builtin_prefetch(&txq->ift_sds.ifsd_m[nic_i]); 755 __builtin_prefetch(&txq->ift_sds.ifsd_map[nic_i]); 756 757 for (n = 0; nm_i != head; n++) { 758 struct netmap_slot *slot = &ring->slot[nm_i]; 759 u_int len = slot->len; 760 uint64_t paddr; 761 void *addr = PNMB(na, slot, &paddr); 762 int flags = (slot->flags & NS_REPORT || 763 nic_i == 0 || nic_i == report_frequency) ? 764 IPI_TX_INTR : 0; 765 766 /* device-specific */ 767 pi.ipi_pidx = nic_i; 768 pi.ipi_flags = flags; 769 770 /* Fill the slot in the NIC ring. */ 771 ctx->isc_txd_encap(ctx->ifc_softc, &pi); 772 773 /* prefetch for next round */ 774 __builtin_prefetch(&ring->slot[nm_i + 1]); 775 __builtin_prefetch(&txq->ift_sds.ifsd_m[nic_i + 1]); 776 __builtin_prefetch(&txq->ift_sds.ifsd_map[nic_i + 1]); 777 778 NM_CHECK_ADDR_LEN(na, addr, len); 779 780 if (slot->flags & NS_BUF_CHANGED) { 781 /* buffer has changed, reload map */ 782 netmap_reload_map(na, txq->ift_desc_tag, txq->ift_sds.ifsd_map[nic_i], addr); 783 } 784 slot->flags &= ~(NS_REPORT | NS_BUF_CHANGED); 785 786 /* make sure changes to the buffer are synced */ 787 bus_dmamap_sync(txq->ift_ifdi->idi_tag, txq->ift_sds.ifsd_map[nic_i], 788 BUS_DMASYNC_PREWRITE); 789 790 nm_i = nm_next(nm_i, lim); 791 nic_i = nm_next(nic_i, lim); 792 } 793 kring->nr_hwcur = head; 794 795 /* synchronize the NIC ring */ 796 bus_dmamap_sync(txq->ift_desc_tag, txq->ift_ifdi->idi_map, 797 BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); 798 799 /* (re)start the tx unit up to slot nic_i (excluded) */ 800 ctx->isc_txd_flush(ctx->ifc_softc, txq->ift_id, nic_i); 801 } 802 803 /* 804 * Second part: reclaim buffers for completed transmissions. 805 */ 806 if (iflib_tx_credits_update(ctx, txq)) { 807 /* some tx completed, increment avail */ 808 nic_i = txq->ift_cidx_processed; 809 kring->nr_hwtail = nm_prev(netmap_idx_n2k(kring, nic_i), lim); 810 } 811 return (0); 812 } 813 814 /* 815 * Reconcile kernel and user view of the receive ring. 816 * Same as for the txsync, this routine must be efficient. 817 * The caller guarantees a single invocations, but races against 818 * the rest of the driver should be handled here. 819 * 820 * On call, kring->rhead is the first packet that userspace wants 821 * to keep, and kring->rcur is the wakeup point. 822 * The kernel has previously reported packets up to kring->rtail. 823 * 824 * If (flags & NAF_FORCE_READ) also check for incoming packets irrespective 825 * of whether or not we received an interrupt. 826 */ 827 static int 828 iflib_netmap_rxsync(struct netmap_kring *kring, int flags) 829 { 830 struct netmap_adapter *na = kring->na; 831 struct ifnet *ifp = na->ifp; 832 struct netmap_ring *ring = kring->ring; 833 u_int nm_i; /* index into the netmap ring */ 834 u_int nic_i; /* index into the NIC ring */ 835 u_int i, n; 836 u_int const lim = kring->nkr_num_slots - 1; 837 u_int const head = kring->rhead; 838 int force_update = (flags & NAF_FORCE_READ) || kring->nr_kflags & NKR_PENDINTR; 839 struct if_rxd_info ri; 840 /* device-specific */ 841 if_ctx_t ctx = ifp->if_softc; 842 iflib_rxq_t rxq = &ctx->ifc_rxqs[kring->ring_id]; 843 iflib_fl_t fl = rxq->ifr_fl; 844 if (head > lim) 845 return netmap_ring_reinit(kring); 846 847 bzero(&ri, sizeof(ri)); 848 ri.iri_qsidx = kring->ring_id; 849 ri.iri_ifp = ctx->ifc_ifp; 850 /* XXX check sync modes */ 851 for (i = 0, fl = rxq->ifr_fl; i < rxq->ifr_nfl; i++, fl++) 852 bus_dmamap_sync(rxq->ifr_fl[i].ifl_desc_tag, fl->ifl_ifdi->idi_map, 853 BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE); 854 855 /* 856 * First part: import newly received packets. 857 * 858 * nm_i is the index of the next free slot in the netmap ring, 859 * nic_i is the index of the next received packet in the NIC ring, 860 * and they may differ in case if_init() has been called while 861 * in netmap mode. For the receive ring we have 862 * 863 * nic_i = rxr->next_check; 864 * nm_i = kring->nr_hwtail (previous) 865 * and 866 * nm_i == (nic_i + kring->nkr_hwofs) % ring_size 867 * 868 * rxr->next_check is set to 0 on a ring reinit 869 */ 870 if (netmap_no_pendintr || force_update) { 871 int crclen = iflib_crcstrip ? 0 : 4; 872 int error, avail; 873 uint16_t slot_flags = kring->nkr_slot_flags; 874 875 for (fl = rxq->ifr_fl, i = 0; i < rxq->ifr_nfl; i++, fl++) { 876 nic_i = fl->ifl_cidx; 877 nm_i = netmap_idx_n2k(kring, nic_i); 878 avail = ctx->isc_rxd_available(ctx->ifc_softc, kring->ring_id, nic_i); 879 for (n = 0; avail > 0; n++, avail--) { 880 error = ctx->isc_rxd_pkt_get(ctx->ifc_softc, &ri); 881 if (error) 882 ring->slot[nm_i].len = 0; 883 else 884 ring->slot[nm_i].len = ri.iri_len - crclen; 885 ring->slot[nm_i].flags = slot_flags; 886 bus_dmamap_sync(fl->ifl_ifdi->idi_tag, 887 fl->ifl_sds[nic_i].ifsd_map, BUS_DMASYNC_POSTREAD); 888 nm_i = nm_next(nm_i, lim); 889 nic_i = nm_next(nic_i, lim); 890 } 891 if (n) { /* update the state variables */ 892 if (netmap_no_pendintr && !force_update) { 893 /* diagnostics */ 894 iflib_rx_miss ++; 895 iflib_rx_miss_bufs += n; 896 } 897 fl->ifl_cidx = nic_i; 898 kring->nr_hwtail = nm_i; 899 } 900 kring->nr_kflags &= ~NKR_PENDINTR; 901 } 902 } 903 /* 904 * Second part: skip past packets that userspace has released. 905 * (kring->nr_hwcur to head excluded), 906 * and make the buffers available for reception. 907 * As usual nm_i is the index in the netmap ring, 908 * nic_i is the index in the NIC ring, and 909 * nm_i == (nic_i + kring->nkr_hwofs) % ring_size 910 */ 911 /* XXX not sure how this will work with multiple free lists */ 912 nm_i = kring->nr_hwcur; 913 if (nm_i != head) { 914 nic_i = netmap_idx_k2n(kring, nm_i); 915 for (n = 0; nm_i != head; n++) { 916 struct netmap_slot *slot = &ring->slot[nm_i]; 917 uint64_t paddr; 918 caddr_t vaddr; 919 void *addr = PNMB(na, slot, &paddr); 920 921 if (addr == NETMAP_BUF_BASE(na)) /* bad buf */ 922 goto ring_reset; 923 924 vaddr = addr; 925 if (slot->flags & NS_BUF_CHANGED) { 926 /* buffer has changed, reload map */ 927 netmap_reload_map(na, fl->ifl_ifdi->idi_tag, fl->ifl_sds[nic_i].ifsd_map, addr); 928 slot->flags &= ~NS_BUF_CHANGED; 929 } 930 /* 931 * XXX we should be batching this operation - TODO 932 */ 933 ctx->isc_rxd_refill(ctx->ifc_softc, rxq->ifr_id, fl->ifl_id, nic_i, &paddr, &vaddr, 1); 934 bus_dmamap_sync(fl->ifl_ifdi->idi_tag, fl->ifl_sds[nic_i].ifsd_map, 935 BUS_DMASYNC_PREREAD); 936 nm_i = nm_next(nm_i, lim); 937 nic_i = nm_next(nic_i, lim); 938 } 939 kring->nr_hwcur = head; 940 941 bus_dmamap_sync(fl->ifl_ifdi->idi_tag, fl->ifl_ifdi->idi_map, 942 BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); 943 /* 944 * IMPORTANT: we must leave one free slot in the ring, 945 * so move nic_i back by one unit 946 */ 947 nic_i = nm_prev(nic_i, lim); 948 ctx->isc_rxd_flush(ctx->ifc_softc, rxq->ifr_id, fl->ifl_id, nic_i); 949 } 950 951 return 0; 952 953 ring_reset: 954 return netmap_ring_reinit(kring); 955 } 956 957 static int 958 iflib_netmap_attach(if_ctx_t ctx) 959 { 960 struct netmap_adapter na; 961 962 bzero(&na, sizeof(na)); 963 964 na.ifp = ctx->ifc_ifp; 965 na.na_flags = NAF_BDG_MAYSLEEP; 966 MPASS(ctx->ifc_softc_ctx.isc_ntxqsets); 967 MPASS(ctx->ifc_softc_ctx.isc_nrxqsets); 968 969 na.num_tx_desc = ctx->ifc_sctx->isc_ntxd; 970 na.num_rx_desc = ctx->ifc_sctx->isc_ntxd; 971 na.nm_txsync = iflib_netmap_txsync; 972 na.nm_rxsync = iflib_netmap_rxsync; 973 na.nm_register = iflib_netmap_register; 974 na.num_tx_rings = ctx->ifc_softc_ctx.isc_ntxqsets; 975 na.num_rx_rings = ctx->ifc_softc_ctx.isc_nrxqsets; 976 return (netmap_attach(&na)); 977 } 978 979 static void 980 iflib_netmap_txq_init(if_ctx_t ctx, iflib_txq_t txq) 981 { 982 struct netmap_adapter *na = NA(ctx->ifc_ifp); 983 struct netmap_slot *slot; 984 985 slot = netmap_reset(na, NR_TX, txq->ift_id, 0); 986 if (slot == 0) 987 return; 988 989 for (int i = 0; i < ctx->ifc_sctx->isc_ntxd; i++) { 990 991 /* 992 * In netmap mode, set the map for the packet buffer. 993 * NOTE: Some drivers (not this one) also need to set 994 * the physical buffer address in the NIC ring. 995 * netmap_idx_n2k() maps a nic index, i, into the corresponding 996 * netmap slot index, si 997 */ 998 int si = netmap_idx_n2k(&na->tx_rings[txq->ift_id], i); 999 netmap_load_map(na, txq->ift_desc_tag, txq->ift_sds.ifsd_map[i], NMB(na, slot + si)); 1000 } 1001 } 1002 static void 1003 iflib_netmap_rxq_init(if_ctx_t ctx, iflib_rxq_t rxq) 1004 { 1005 struct netmap_adapter *na = NA(ctx->ifc_ifp); 1006 struct netmap_slot *slot; 1007 iflib_rxsd_t sd; 1008 int nrxd; 1009 1010 slot = netmap_reset(na, NR_RX, rxq->ifr_id, 0); 1011 if (slot == 0) 1012 return; 1013 sd = rxq->ifr_fl[0].ifl_sds; 1014 nrxd = ctx->ifc_sctx->isc_nrxd; 1015 for (int i = 0; i < nrxd; i++, sd++) { 1016 int sj = netmap_idx_n2k(&na->rx_rings[rxq->ifr_id], i); 1017 uint64_t paddr; 1018 void *addr; 1019 caddr_t vaddr; 1020 1021 vaddr = addr = PNMB(na, slot + sj, &paddr); 1022 netmap_load_map(na, rxq->ifr_fl[0].ifl_ifdi->idi_tag, sd->ifsd_map, addr); 1023 /* Update descriptor and the cached value */ 1024 ctx->isc_rxd_refill(ctx->ifc_softc, rxq->ifr_id, 0 /* fl_id */, i, &paddr, &vaddr, 1); 1025 } 1026 /* preserve queue */ 1027 if (ctx->ifc_ifp->if_capenable & IFCAP_NETMAP) { 1028 struct netmap_kring *kring = &na->rx_rings[rxq->ifr_id]; 1029 int t = na->num_rx_desc - 1 - nm_kr_rxspace(kring); 1030 ctx->isc_rxd_flush(ctx->ifc_softc, rxq->ifr_id, 0 /* fl_id */, t); 1031 } else 1032 ctx->isc_rxd_flush(ctx->ifc_softc, rxq->ifr_id, 0 /* fl_id */, nrxd-1); 1033 } 1034 1035 #define iflib_netmap_detach(ifp) netmap_detach(ifp) 1036 1037 #else 1038 #define iflib_netmap_txq_init(ctx, txq) 1039 #define iflib_netmap_rxq_init(ctx, rxq) 1040 #define iflib_netmap_detach(ifp) 1041 1042 #define iflib_netmap_attach(ctx) (0) 1043 #define netmap_rx_irq(ifp, qid, budget) (0) 1044 1045 #endif 1046 1047 #if defined(__i386__) || defined(__amd64__) 1048 static __inline void 1049 prefetch(void *x) 1050 { 1051 __asm volatile("prefetcht0 %0" :: "m" (*(unsigned long *)x)); 1052 } 1053 #else 1054 #define prefetch(x) 1055 #endif 1056 1057 static void 1058 _iflib_dmamap_cb(void *arg, bus_dma_segment_t *segs, int nseg, int err) 1059 { 1060 if (err) 1061 return; 1062 *(bus_addr_t *) arg = segs[0].ds_addr; 1063 } 1064 1065 int 1066 iflib_dma_alloc(if_ctx_t ctx, int size, iflib_dma_info_t dma, int mapflags) 1067 { 1068 int err; 1069 if_shared_ctx_t sctx = ctx->ifc_sctx; 1070 device_t dev = ctx->ifc_dev; 1071 1072 KASSERT(sctx->isc_q_align != 0, ("alignment value not initialized")); 1073 1074 err = bus_dma_tag_create(bus_get_dma_tag(dev), /* parent */ 1075 sctx->isc_q_align, 0, /* alignment, bounds */ 1076 BUS_SPACE_MAXADDR, /* lowaddr */ 1077 BUS_SPACE_MAXADDR, /* highaddr */ 1078 NULL, NULL, /* filter, filterarg */ 1079 size, /* maxsize */ 1080 1, /* nsegments */ 1081 size, /* maxsegsize */ 1082 BUS_DMA_ALLOCNOW, /* flags */ 1083 NULL, /* lockfunc */ 1084 NULL, /* lockarg */ 1085 &dma->idi_tag); 1086 if (err) { 1087 device_printf(dev, 1088 "%s: bus_dma_tag_create failed: %d\n", 1089 __func__, err); 1090 goto fail_0; 1091 } 1092 1093 err = bus_dmamem_alloc(dma->idi_tag, (void**) &dma->idi_vaddr, 1094 BUS_DMA_NOWAIT | BUS_DMA_COHERENT | BUS_DMA_ZERO, &dma->idi_map); 1095 if (err) { 1096 device_printf(dev, 1097 "%s: bus_dmamem_alloc(%ju) failed: %d\n", 1098 __func__, (uintmax_t)size, err); 1099 goto fail_1; 1100 } 1101 1102 dma->idi_paddr = IF_BAD_DMA; 1103 err = bus_dmamap_load(dma->idi_tag, dma->idi_map, dma->idi_vaddr, 1104 size, _iflib_dmamap_cb, &dma->idi_paddr, mapflags | BUS_DMA_NOWAIT); 1105 if (err || dma->idi_paddr == IF_BAD_DMA) { 1106 device_printf(dev, 1107 "%s: bus_dmamap_load failed: %d\n", 1108 __func__, err); 1109 goto fail_2; 1110 } 1111 1112 dma->idi_size = size; 1113 return (0); 1114 1115 fail_2: 1116 bus_dmamem_free(dma->idi_tag, dma->idi_vaddr, dma->idi_map); 1117 fail_1: 1118 bus_dma_tag_destroy(dma->idi_tag); 1119 fail_0: 1120 dma->idi_tag = NULL; 1121 1122 return (err); 1123 } 1124 1125 int 1126 iflib_dma_alloc_multi(if_ctx_t ctx, int *sizes, iflib_dma_info_t *dmalist, int mapflags, int count) 1127 { 1128 int i, err; 1129 iflib_dma_info_t *dmaiter; 1130 1131 dmaiter = dmalist; 1132 for (i = 0; i < count; i++, dmaiter++) { 1133 if ((err = iflib_dma_alloc(ctx, sizes[i], *dmaiter, mapflags)) != 0) 1134 break; 1135 } 1136 if (err) 1137 iflib_dma_free_multi(dmalist, i); 1138 return (err); 1139 } 1140 1141 void 1142 iflib_dma_free(iflib_dma_info_t dma) 1143 { 1144 if (dma->idi_tag == NULL) 1145 return; 1146 if (dma->idi_paddr != IF_BAD_DMA) { 1147 bus_dmamap_sync(dma->idi_tag, dma->idi_map, 1148 BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE); 1149 bus_dmamap_unload(dma->idi_tag, dma->idi_map); 1150 dma->idi_paddr = IF_BAD_DMA; 1151 } 1152 if (dma->idi_vaddr != NULL) { 1153 bus_dmamem_free(dma->idi_tag, dma->idi_vaddr, dma->idi_map); 1154 dma->idi_vaddr = NULL; 1155 } 1156 bus_dma_tag_destroy(dma->idi_tag); 1157 dma->idi_tag = NULL; 1158 } 1159 1160 void 1161 iflib_dma_free_multi(iflib_dma_info_t *dmalist, int count) 1162 { 1163 int i; 1164 iflib_dma_info_t *dmaiter = dmalist; 1165 1166 for (i = 0; i < count; i++, dmaiter++) 1167 iflib_dma_free(*dmaiter); 1168 } 1169 1170 static int 1171 iflib_fast_intr(void *arg) 1172 { 1173 iflib_filter_info_t info = arg; 1174 struct grouptask *gtask = info->ifi_task; 1175 1176 DBG_COUNTER_INC(fast_intrs); 1177 if (info->ifi_filter != NULL && info->ifi_filter(info->ifi_filter_arg) == FILTER_HANDLED) 1178 return (FILTER_HANDLED); 1179 1180 GROUPTASK_ENQUEUE(gtask); 1181 return (FILTER_HANDLED); 1182 } 1183 1184 static int 1185 _iflib_irq_alloc(if_ctx_t ctx, if_irq_t irq, int rid, 1186 driver_filter_t filter, driver_intr_t handler, void *arg, 1187 char *name) 1188 { 1189 int rc; 1190 struct resource *res; 1191 void *tag; 1192 device_t dev = ctx->ifc_dev; 1193 1194 MPASS(rid < 512); 1195 irq->ii_rid = rid; 1196 res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &irq->ii_rid, 1197 RF_SHAREABLE | RF_ACTIVE); 1198 if (res == NULL) { 1199 device_printf(dev, 1200 "failed to allocate IRQ for rid %d, name %s.\n", rid, name); 1201 return (ENOMEM); 1202 } 1203 irq->ii_res = res; 1204 KASSERT(filter == NULL || handler == NULL, ("filter and handler can't both be non-NULL")); 1205 rc = bus_setup_intr(dev, res, INTR_MPSAFE | INTR_TYPE_NET, 1206 filter, handler, arg, &tag); 1207 if (rc != 0) { 1208 device_printf(dev, 1209 "failed to setup interrupt for rid %d, name %s: %d\n", 1210 rid, name ? name : "unknown", rc); 1211 return (rc); 1212 } else if (name) 1213 bus_describe_intr(dev, res, tag, name); 1214 1215 irq->ii_tag = tag; 1216 return (0); 1217 } 1218 1219 1220 /********************************************************************* 1221 * 1222 * Allocate memory for tx_buffer structures. The tx_buffer stores all 1223 * the information needed to transmit a packet on the wire. This is 1224 * called only once at attach, setup is done every reset. 1225 * 1226 **********************************************************************/ 1227 1228 static int 1229 iflib_txsd_alloc(iflib_txq_t txq) 1230 { 1231 if_ctx_t ctx = txq->ift_ctx; 1232 if_shared_ctx_t sctx = ctx->ifc_sctx; 1233 if_softc_ctx_t scctx = &ctx->ifc_softc_ctx; 1234 device_t dev = ctx->ifc_dev; 1235 int err, nsegments, ntsosegments; 1236 1237 nsegments = scctx->isc_tx_nsegments; 1238 ntsosegments = scctx->isc_tx_tso_segments_max; 1239 MPASS(sctx->isc_ntxd > 0); 1240 MPASS(nsegments > 0); 1241 MPASS(ntsosegments > 0); 1242 /* 1243 * Setup DMA descriptor areas. 1244 */ 1245 if ((err = bus_dma_tag_create(bus_get_dma_tag(dev), 1246 1, 0, /* alignment, bounds */ 1247 BUS_SPACE_MAXADDR, /* lowaddr */ 1248 BUS_SPACE_MAXADDR, /* highaddr */ 1249 NULL, NULL, /* filter, filterarg */ 1250 sctx->isc_tx_maxsize, /* maxsize */ 1251 nsegments, /* nsegments */ 1252 sctx->isc_tx_maxsegsize, /* maxsegsize */ 1253 0, /* flags */ 1254 NULL, /* lockfunc */ 1255 NULL, /* lockfuncarg */ 1256 &txq->ift_desc_tag))) { 1257 device_printf(dev,"Unable to allocate TX DMA tag: %d\n", err); 1258 device_printf(dev,"maxsize: %zd nsegments: %d maxsegsize: %zd\n", 1259 sctx->isc_tx_maxsize, nsegments, sctx->isc_tx_maxsegsize); 1260 goto fail; 1261 } 1262 #ifdef INVARIANTS 1263 device_printf(dev,"maxsize: %zd nsegments: %d maxsegsize: %zd\n", 1264 sctx->isc_tx_maxsize, nsegments, sctx->isc_tx_maxsegsize); 1265 #endif 1266 device_printf(dev,"TSO maxsize: %d ntsosegments: %d maxsegsize: %d\n", 1267 scctx->isc_tx_tso_size_max, ntsosegments, 1268 scctx->isc_tx_tso_segsize_max); 1269 if ((err = bus_dma_tag_create(bus_get_dma_tag(dev), 1270 1, 0, /* alignment, bounds */ 1271 BUS_SPACE_MAXADDR, /* lowaddr */ 1272 BUS_SPACE_MAXADDR, /* highaddr */ 1273 NULL, NULL, /* filter, filterarg */ 1274 scctx->isc_tx_tso_size_max, /* maxsize */ 1275 ntsosegments, /* nsegments */ 1276 scctx->isc_tx_tso_segsize_max, /* maxsegsize */ 1277 0, /* flags */ 1278 NULL, /* lockfunc */ 1279 NULL, /* lockfuncarg */ 1280 &txq->ift_tso_desc_tag))) { 1281 device_printf(dev,"Unable to allocate TX TSO DMA tag: %d\n", err); 1282 1283 goto fail; 1284 } 1285 #ifdef INVARIANTS 1286 device_printf(dev,"TSO maxsize: %d ntsosegments: %d maxsegsize: %d\n", 1287 scctx->isc_tx_tso_size_max, ntsosegments, 1288 scctx->isc_tx_tso_segsize_max); 1289 #endif 1290 if (!(txq->ift_sds.ifsd_flags = 1291 (uint8_t *) malloc(sizeof(uint8_t) * 1292 sctx->isc_ntxd, M_IFLIB, M_NOWAIT | M_ZERO))) { 1293 device_printf(dev, "Unable to allocate tx_buffer memory\n"); 1294 err = ENOMEM; 1295 goto fail; 1296 } 1297 if (!(txq->ift_sds.ifsd_m = 1298 (struct mbuf **) malloc(sizeof(struct mbuf *) * 1299 sctx->isc_ntxd, M_IFLIB, M_NOWAIT | M_ZERO))) { 1300 device_printf(dev, "Unable to allocate tx_buffer memory\n"); 1301 err = ENOMEM; 1302 goto fail; 1303 } 1304 1305 /* Create the descriptor buffer dma maps */ 1306 #if defined(ACPI_DMAR) || (!(defined(__i386__) && !defined(__amd64__))) 1307 if ((ctx->ifc_flags & IFC_DMAR) == 0) 1308 return (0); 1309 1310 if (!(txq->ift_sds.ifsd_map = 1311 (bus_dmamap_t *) malloc(sizeof(bus_dmamap_t) * sctx->isc_ntxd, M_IFLIB, M_NOWAIT | M_ZERO))) { 1312 device_printf(dev, "Unable to allocate tx_buffer map memory\n"); 1313 err = ENOMEM; 1314 goto fail; 1315 } 1316 1317 for (int i = 0; i < sctx->isc_ntxd; i++) { 1318 err = bus_dmamap_create(txq->ift_desc_tag, 0, &txq->ift_sds.ifsd_map[i]); 1319 if (err != 0) { 1320 device_printf(dev, "Unable to create TX DMA map\n"); 1321 goto fail; 1322 } 1323 } 1324 #endif 1325 return (0); 1326 fail: 1327 /* We free all, it handles case where we are in the middle */ 1328 iflib_tx_structures_free(ctx); 1329 return (err); 1330 } 1331 1332 static void 1333 iflib_txsd_destroy(if_ctx_t ctx, iflib_txq_t txq, int i) 1334 { 1335 bus_dmamap_t map; 1336 1337 map = NULL; 1338 if (txq->ift_sds.ifsd_map != NULL) 1339 map = txq->ift_sds.ifsd_map[i]; 1340 if (map != NULL) { 1341 bus_dmamap_unload(txq->ift_desc_tag, map); 1342 bus_dmamap_destroy(txq->ift_desc_tag, map); 1343 txq->ift_sds.ifsd_map[i] = NULL; 1344 } 1345 } 1346 1347 static void 1348 iflib_txq_destroy(iflib_txq_t txq) 1349 { 1350 if_ctx_t ctx = txq->ift_ctx; 1351 if_shared_ctx_t sctx = ctx->ifc_sctx; 1352 1353 for (int i = 0; i < sctx->isc_ntxd; i++) 1354 iflib_txsd_destroy(ctx, txq, i); 1355 if (txq->ift_sds.ifsd_map != NULL) { 1356 free(txq->ift_sds.ifsd_map, M_IFLIB); 1357 txq->ift_sds.ifsd_map = NULL; 1358 } 1359 if (txq->ift_sds.ifsd_m != NULL) { 1360 free(txq->ift_sds.ifsd_m, M_IFLIB); 1361 txq->ift_sds.ifsd_m = NULL; 1362 } 1363 if (txq->ift_sds.ifsd_flags != NULL) { 1364 free(txq->ift_sds.ifsd_flags, M_IFLIB); 1365 txq->ift_sds.ifsd_flags = NULL; 1366 } 1367 if (txq->ift_desc_tag != NULL) { 1368 bus_dma_tag_destroy(txq->ift_desc_tag); 1369 txq->ift_desc_tag = NULL; 1370 } 1371 if (txq->ift_tso_desc_tag != NULL) { 1372 bus_dma_tag_destroy(txq->ift_tso_desc_tag); 1373 txq->ift_tso_desc_tag = NULL; 1374 } 1375 } 1376 1377 static void 1378 iflib_txsd_free(if_ctx_t ctx, iflib_txq_t txq, int i) 1379 { 1380 struct mbuf **mp; 1381 1382 mp = &txq->ift_sds.ifsd_m[i]; 1383 if (*mp == NULL) 1384 return; 1385 1386 if (txq->ift_sds.ifsd_map != NULL) { 1387 bus_dmamap_sync(txq->ift_desc_tag, 1388 txq->ift_sds.ifsd_map[i], 1389 BUS_DMASYNC_POSTWRITE); 1390 bus_dmamap_unload(txq->ift_desc_tag, 1391 txq->ift_sds.ifsd_map[i]); 1392 } 1393 m_freem(*mp); 1394 DBG_COUNTER_INC(tx_frees); 1395 *mp = NULL; 1396 } 1397 1398 static int 1399 iflib_txq_setup(iflib_txq_t txq) 1400 { 1401 if_ctx_t ctx = txq->ift_ctx; 1402 if_shared_ctx_t sctx = ctx->ifc_sctx; 1403 iflib_dma_info_t di; 1404 int i; 1405 1406 /* Set number of descriptors available */ 1407 txq->ift_qstatus = IFLIB_QUEUE_IDLE; 1408 1409 /* Reset indices */ 1410 txq->ift_cidx_processed = txq->ift_pidx = txq->ift_cidx = txq->ift_npending = 0; 1411 txq->ift_size = sctx->isc_ntxd; 1412 1413 for (i = 0, di = txq->ift_ifdi; i < ctx->ifc_nhwtxqs; i++, di++) 1414 bzero((void *)di->idi_vaddr, di->idi_size); 1415 1416 IFDI_TXQ_SETUP(ctx, txq->ift_id); 1417 for (i = 0, di = txq->ift_ifdi; i < ctx->ifc_nhwtxqs; i++, di++) 1418 bus_dmamap_sync(di->idi_tag, di->idi_map, 1419 BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); 1420 return (0); 1421 } 1422 1423 /********************************************************************* 1424 * 1425 * Allocate memory for rx_buffer structures. Since we use one 1426 * rx_buffer per received packet, the maximum number of rx_buffer's 1427 * that we'll need is equal to the number of receive descriptors 1428 * that we've allocated. 1429 * 1430 **********************************************************************/ 1431 static int 1432 iflib_rxsd_alloc(iflib_rxq_t rxq) 1433 { 1434 if_ctx_t ctx = rxq->ifr_ctx; 1435 if_shared_ctx_t sctx = ctx->ifc_sctx; 1436 device_t dev = ctx->ifc_dev; 1437 iflib_fl_t fl; 1438 iflib_rxsd_t rxsd; 1439 int err; 1440 1441 MPASS(sctx->isc_nrxd > 0); 1442 1443 fl = rxq->ifr_fl; 1444 for (int i = 0; i < rxq->ifr_nfl; i++, fl++) { 1445 fl->ifl_sds = malloc(sizeof(struct iflib_sw_rx_desc) * 1446 sctx->isc_nrxd, M_IFLIB, M_WAITOK | M_ZERO); 1447 if (fl->ifl_sds == NULL) { 1448 device_printf(dev, "Unable to allocate rx sw desc memory\n"); 1449 return (ENOMEM); 1450 } 1451 fl->ifl_size = sctx->isc_nrxd; /* this isn't necessarily the same */ 1452 err = bus_dma_tag_create(bus_get_dma_tag(dev), /* parent */ 1453 1, 0, /* alignment, bounds */ 1454 BUS_SPACE_MAXADDR, /* lowaddr */ 1455 BUS_SPACE_MAXADDR, /* highaddr */ 1456 NULL, NULL, /* filter, filterarg */ 1457 sctx->isc_rx_maxsize, /* maxsize */ 1458 sctx->isc_rx_nsegments, /* nsegments */ 1459 sctx->isc_rx_maxsegsize, /* maxsegsize */ 1460 0, /* flags */ 1461 NULL, /* lockfunc */ 1462 NULL, /* lockarg */ 1463 &fl->ifl_desc_tag); 1464 if (err) { 1465 device_printf(dev, "%s: bus_dma_tag_create failed %d\n", 1466 __func__, err); 1467 goto fail; 1468 } 1469 1470 rxsd = fl->ifl_sds; 1471 for (int i = 0; i < sctx->isc_nrxd; i++, rxsd++) { 1472 err = bus_dmamap_create(fl->ifl_desc_tag, 0, &rxsd->ifsd_map); 1473 if (err) { 1474 device_printf(dev, "%s: bus_dmamap_create failed: %d\n", 1475 __func__, err); 1476 goto fail; 1477 } 1478 } 1479 } 1480 return (0); 1481 1482 fail: 1483 iflib_rx_structures_free(ctx); 1484 return (err); 1485 } 1486 1487 1488 /* 1489 * Internal service routines 1490 */ 1491 1492 struct rxq_refill_cb_arg { 1493 int error; 1494 bus_dma_segment_t seg; 1495 int nseg; 1496 }; 1497 1498 static void 1499 _rxq_refill_cb(void *arg, bus_dma_segment_t *segs, int nseg, int error) 1500 { 1501 struct rxq_refill_cb_arg *cb_arg = arg; 1502 1503 cb_arg->error = error; 1504 cb_arg->seg = segs[0]; 1505 cb_arg->nseg = nseg; 1506 } 1507 1508 1509 #ifdef ACPI_DMAR 1510 #define IS_DMAR(ctx) (ctx->ifc_flags & IFC_DMAR) 1511 #else 1512 #define IS_DMAR(ctx) (0) 1513 #endif 1514 1515 /** 1516 * rxq_refill - refill an rxq free-buffer list 1517 * @ctx: the iflib context 1518 * @rxq: the free-list to refill 1519 * @n: the number of new buffers to allocate 1520 * 1521 * (Re)populate an rxq free-buffer list with up to @n new packet buffers. 1522 * The caller must assure that @n does not exceed the queue's capacity. 1523 */ 1524 static void 1525 _iflib_fl_refill(if_ctx_t ctx, iflib_fl_t fl, int count) 1526 { 1527 struct mbuf *m; 1528 int pidx = fl->ifl_pidx; 1529 iflib_rxsd_t rxsd = &fl->ifl_sds[pidx]; 1530 caddr_t cl; 1531 int n, i = 0; 1532 uint64_t bus_addr; 1533 int err; 1534 1535 n = count; 1536 MPASS(n > 0); 1537 MPASS(fl->ifl_credits + n <= fl->ifl_size); 1538 1539 if (pidx < fl->ifl_cidx) 1540 MPASS(pidx + n <= fl->ifl_cidx); 1541 if (pidx == fl->ifl_cidx && (fl->ifl_credits < fl->ifl_size)) 1542 MPASS(fl->ifl_gen == 0); 1543 if (pidx > fl->ifl_cidx) 1544 MPASS(n <= fl->ifl_size - pidx + fl->ifl_cidx); 1545 1546 DBG_COUNTER_INC(fl_refills); 1547 if (n > 8) 1548 DBG_COUNTER_INC(fl_refills_large); 1549 1550 while (n--) { 1551 /* 1552 * We allocate an uninitialized mbuf + cluster, mbuf is 1553 * initialized after rx. 1554 * 1555 * If the cluster is still set then we know a minimum sized packet was received 1556 */ 1557 if ((cl = rxsd->ifsd_cl) == NULL) { 1558 if ((cl = rxsd->ifsd_cl = m_cljget(NULL, M_NOWAIT, fl->ifl_buf_size)) == NULL) 1559 break; 1560 #if MEMORY_LOGGING 1561 fl->ifl_cl_enqueued++; 1562 #endif 1563 } 1564 if ((m = m_gethdr(M_NOWAIT, MT_NOINIT)) == NULL) { 1565 break; 1566 } 1567 #if MEMORY_LOGGING 1568 fl->ifl_m_enqueued++; 1569 #endif 1570 1571 DBG_COUNTER_INC(rx_allocs); 1572 #ifdef notyet 1573 if ((rxsd->ifsd_flags & RX_SW_DESC_MAP_CREATED) == 0) { 1574 int err; 1575 1576 if ((err = bus_dmamap_create(fl->ifl_ifdi->idi_tag, 0, &rxsd->ifsd_map))) { 1577 log(LOG_WARNING, "bus_dmamap_create failed %d\n", err); 1578 uma_zfree(fl->ifl_zone, cl); 1579 n = 0; 1580 goto done; 1581 } 1582 rxsd->ifsd_flags |= RX_SW_DESC_MAP_CREATED; 1583 } 1584 #endif 1585 #if defined(__i386__) || defined(__amd64__) 1586 if (!IS_DMAR(ctx)) { 1587 bus_addr = pmap_kextract((vm_offset_t)cl); 1588 } else 1589 #endif 1590 { 1591 struct rxq_refill_cb_arg cb_arg; 1592 iflib_rxq_t q; 1593 1594 cb_arg.error = 0; 1595 q = fl->ifl_rxq; 1596 err = bus_dmamap_load(fl->ifl_desc_tag, rxsd->ifsd_map, 1597 cl, fl->ifl_buf_size, _rxq_refill_cb, &cb_arg, 0); 1598 1599 if (err != 0 || cb_arg.error) { 1600 /* 1601 * !zone_pack ? 1602 */ 1603 if (fl->ifl_zone == zone_pack) 1604 uma_zfree(fl->ifl_zone, cl); 1605 m_free(m); 1606 n = 0; 1607 goto done; 1608 } 1609 bus_addr = cb_arg.seg.ds_addr; 1610 } 1611 rxsd->ifsd_flags |= RX_SW_DESC_INUSE; 1612 1613 MPASS(rxsd->ifsd_m == NULL); 1614 rxsd->ifsd_cl = cl; 1615 rxsd->ifsd_m = m; 1616 fl->ifl_bus_addrs[i] = bus_addr; 1617 fl->ifl_vm_addrs[i] = cl; 1618 rxsd++; 1619 fl->ifl_credits++; 1620 i++; 1621 MPASS(fl->ifl_credits <= fl->ifl_size); 1622 if (++fl->ifl_pidx == fl->ifl_size) { 1623 fl->ifl_pidx = 0; 1624 fl->ifl_gen = 1; 1625 rxsd = fl->ifl_sds; 1626 } 1627 if (n == 0 || i == IFLIB_MAX_RX_REFRESH) { 1628 ctx->isc_rxd_refill(ctx->ifc_softc, fl->ifl_rxq->ifr_id, fl->ifl_id, pidx, 1629 fl->ifl_bus_addrs, fl->ifl_vm_addrs, i); 1630 i = 0; 1631 pidx = fl->ifl_pidx; 1632 } 1633 } 1634 done: 1635 DBG_COUNTER_INC(rxd_flush); 1636 if (fl->ifl_pidx == 0) 1637 pidx = fl->ifl_size - 1; 1638 else 1639 pidx = fl->ifl_pidx - 1; 1640 ctx->isc_rxd_flush(ctx->ifc_softc, fl->ifl_rxq->ifr_id, fl->ifl_id, pidx); 1641 } 1642 1643 static __inline void 1644 __iflib_fl_refill_lt(if_ctx_t ctx, iflib_fl_t fl, int max) 1645 { 1646 /* we avoid allowing pidx to catch up with cidx as it confuses ixl */ 1647 int32_t reclaimable = fl->ifl_size - fl->ifl_credits - 1; 1648 #ifdef INVARIANTS 1649 int32_t delta = fl->ifl_size - get_inuse(fl->ifl_size, fl->ifl_cidx, fl->ifl_pidx, fl->ifl_gen) - 1; 1650 #endif 1651 1652 MPASS(fl->ifl_credits <= fl->ifl_size); 1653 MPASS(reclaimable == delta); 1654 1655 if (reclaimable > 0) 1656 _iflib_fl_refill(ctx, fl, min(max, reclaimable)); 1657 } 1658 1659 static void 1660 iflib_fl_bufs_free(iflib_fl_t fl) 1661 { 1662 iflib_dma_info_t idi = fl->ifl_ifdi; 1663 uint32_t i; 1664 1665 for (i = 0; i < fl->ifl_size; i++) { 1666 iflib_rxsd_t d = &fl->ifl_sds[i]; 1667 1668 if (d->ifsd_flags & RX_SW_DESC_INUSE) { 1669 bus_dmamap_unload(fl->ifl_desc_tag, d->ifsd_map); 1670 bus_dmamap_destroy(fl->ifl_desc_tag, d->ifsd_map); 1671 if (d->ifsd_m != NULL) { 1672 m_init(d->ifsd_m, M_NOWAIT, MT_DATA, 0); 1673 uma_zfree(zone_mbuf, d->ifsd_m); 1674 } 1675 if (d->ifsd_cl != NULL) 1676 uma_zfree(fl->ifl_zone, d->ifsd_cl); 1677 d->ifsd_flags = 0; 1678 } else { 1679 MPASS(d->ifsd_cl == NULL); 1680 MPASS(d->ifsd_m == NULL); 1681 } 1682 #if MEMORY_LOGGING 1683 fl->ifl_m_dequeued++; 1684 fl->ifl_cl_dequeued++; 1685 #endif 1686 d->ifsd_cl = NULL; 1687 d->ifsd_m = NULL; 1688 } 1689 /* 1690 * Reset free list values 1691 */ 1692 fl->ifl_credits = fl->ifl_cidx = fl->ifl_pidx = fl->ifl_gen = 0;; 1693 bzero(idi->idi_vaddr, idi->idi_size); 1694 } 1695 1696 /********************************************************************* 1697 * 1698 * Initialize a receive ring and its buffers. 1699 * 1700 **********************************************************************/ 1701 static int 1702 iflib_fl_setup(iflib_fl_t fl) 1703 { 1704 iflib_rxq_t rxq = fl->ifl_rxq; 1705 if_ctx_t ctx = rxq->ifr_ctx; 1706 if_softc_ctx_t sctx = &ctx->ifc_softc_ctx; 1707 1708 /* 1709 ** Free current RX buffer structs and their mbufs 1710 */ 1711 iflib_fl_bufs_free(fl); 1712 /* Now replenish the mbufs */ 1713 MPASS(fl->ifl_credits == 0); 1714 /* 1715 * XXX don't set the max_frame_size to larger 1716 * than the hardware can handle 1717 */ 1718 if (sctx->isc_max_frame_size <= 2048) 1719 fl->ifl_buf_size = MCLBYTES; 1720 else if (sctx->isc_max_frame_size <= 4096) 1721 fl->ifl_buf_size = MJUMPAGESIZE; 1722 else if (sctx->isc_max_frame_size <= 9216) 1723 fl->ifl_buf_size = MJUM9BYTES; 1724 else 1725 fl->ifl_buf_size = MJUM16BYTES; 1726 if (fl->ifl_buf_size > ctx->ifc_max_fl_buf_size) 1727 ctx->ifc_max_fl_buf_size = fl->ifl_buf_size; 1728 fl->ifl_cltype = m_gettype(fl->ifl_buf_size); 1729 fl->ifl_zone = m_getzone(fl->ifl_buf_size); 1730 1731 1732 /* avoid pre-allocating zillions of clusters to an idle card 1733 * potentially speeding up attach 1734 */ 1735 _iflib_fl_refill(ctx, fl, min(128, fl->ifl_size)); 1736 MPASS(min(128, fl->ifl_size) == fl->ifl_credits); 1737 if (min(128, fl->ifl_size) != fl->ifl_credits) 1738 return (ENOBUFS); 1739 /* 1740 * handle failure 1741 */ 1742 MPASS(rxq != NULL); 1743 MPASS(fl->ifl_ifdi != NULL); 1744 bus_dmamap_sync(fl->ifl_ifdi->idi_tag, fl->ifl_ifdi->idi_map, 1745 BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); 1746 return (0); 1747 } 1748 1749 /********************************************************************* 1750 * 1751 * Free receive ring data structures 1752 * 1753 **********************************************************************/ 1754 static void 1755 iflib_rx_sds_free(iflib_rxq_t rxq) 1756 { 1757 iflib_fl_t fl; 1758 int i; 1759 1760 if (rxq->ifr_fl != NULL) { 1761 for (i = 0; i < rxq->ifr_nfl; i++) { 1762 fl = &rxq->ifr_fl[i]; 1763 if (fl->ifl_desc_tag != NULL) { 1764 bus_dma_tag_destroy(fl->ifl_desc_tag); 1765 fl->ifl_desc_tag = NULL; 1766 } 1767 } 1768 if (rxq->ifr_fl->ifl_sds != NULL) 1769 free(rxq->ifr_fl->ifl_sds, M_IFLIB); 1770 1771 free(rxq->ifr_fl, M_IFLIB); 1772 rxq->ifr_fl = NULL; 1773 rxq->ifr_cq_gen = rxq->ifr_cq_cidx = rxq->ifr_cq_pidx = 0; 1774 } 1775 } 1776 1777 /* 1778 * MI independent logic 1779 * 1780 */ 1781 static void 1782 iflib_timer(void *arg) 1783 { 1784 iflib_txq_t txq = arg; 1785 if_ctx_t ctx = txq->ift_ctx; 1786 if_softc_ctx_t scctx = &ctx->ifc_softc_ctx; 1787 1788 if (!(if_getdrvflags(ctx->ifc_ifp) & IFF_DRV_RUNNING)) 1789 return; 1790 /* 1791 ** Check on the state of the TX queue(s), this 1792 ** can be done without the lock because its RO 1793 ** and the HUNG state will be static if set. 1794 */ 1795 IFDI_TIMER(ctx, txq->ift_id); 1796 if ((txq->ift_qstatus == IFLIB_QUEUE_HUNG) && 1797 (ctx->ifc_pause_frames == 0)) 1798 goto hung; 1799 1800 if (TXQ_AVAIL(txq) <= 2*scctx->isc_tx_nsegments || 1801 ifmp_ring_is_stalled(txq->ift_br[0])) 1802 GROUPTASK_ENQUEUE(&txq->ift_task); 1803 1804 ctx->ifc_pause_frames = 0; 1805 if (if_getdrvflags(ctx->ifc_ifp) & IFF_DRV_RUNNING) 1806 callout_reset_on(&txq->ift_timer, hz/2, iflib_timer, txq, txq->ift_timer.c_cpu); 1807 return; 1808 hung: 1809 CTX_LOCK(ctx); 1810 if_setdrvflagbits(ctx->ifc_ifp, 0, IFF_DRV_RUNNING); 1811 device_printf(ctx->ifc_dev, "TX(%d) desc avail = %d, pidx = %d\n", 1812 txq->ift_id, TXQ_AVAIL(txq), txq->ift_pidx); 1813 1814 IFDI_WATCHDOG_RESET(ctx); 1815 ctx->ifc_watchdog_events++; 1816 ctx->ifc_pause_frames = 0; 1817 1818 iflib_init_locked(ctx); 1819 CTX_UNLOCK(ctx); 1820 } 1821 1822 static void 1823 iflib_init_locked(if_ctx_t ctx) 1824 { 1825 if_softc_ctx_t sctx = &ctx->ifc_softc_ctx; 1826 if_t ifp = ctx->ifc_ifp; 1827 iflib_fl_t fl; 1828 iflib_txq_t txq; 1829 iflib_rxq_t rxq; 1830 int i, j; 1831 1832 1833 if_setdrvflagbits(ifp, IFF_DRV_OACTIVE, IFF_DRV_RUNNING); 1834 IFDI_INTR_DISABLE(ctx); 1835 1836 /* Set hardware offload abilities */ 1837 if_clearhwassist(ifp); 1838 if (if_getcapenable(ifp) & IFCAP_TXCSUM) 1839 if_sethwassistbits(ifp, CSUM_IP | CSUM_TCP | CSUM_UDP, 0); 1840 if (if_getcapenable(ifp) & IFCAP_TXCSUM_IPV6) 1841 if_sethwassistbits(ifp, (CSUM_TCP_IPV6 | CSUM_UDP_IPV6), 0); 1842 if (if_getcapenable(ifp) & IFCAP_TSO4) 1843 if_sethwassistbits(ifp, CSUM_IP_TSO, 0); 1844 if (if_getcapenable(ifp) & IFCAP_TSO6) 1845 if_sethwassistbits(ifp, CSUM_IP6_TSO, 0); 1846 1847 for (i = 0, txq = ctx->ifc_txqs; i < sctx->isc_ntxqsets; i++, txq++) { 1848 CALLOUT_LOCK(txq); 1849 callout_stop(&txq->ift_timer); 1850 callout_stop(&txq->ift_db_check); 1851 CALLOUT_UNLOCK(txq); 1852 iflib_netmap_txq_init(ctx, txq); 1853 } 1854 for (i = 0, rxq = ctx->ifc_rxqs; i < sctx->isc_nrxqsets; i++, rxq++) { 1855 iflib_netmap_rxq_init(ctx, rxq); 1856 } 1857 IFDI_INIT(ctx); 1858 for (i = 0, rxq = ctx->ifc_rxqs; i < sctx->isc_nrxqsets; i++, rxq++) { 1859 for (j = 0, fl = rxq->ifr_fl; j < rxq->ifr_nfl; j++, fl++) { 1860 if (iflib_fl_setup(fl)) { 1861 device_printf(ctx->ifc_dev, "freelist setup failed - check cluster settings\n"); 1862 goto done; 1863 } 1864 } 1865 } 1866 done: 1867 if_setdrvflagbits(ctx->ifc_ifp, IFF_DRV_RUNNING, IFF_DRV_OACTIVE); 1868 IFDI_INTR_ENABLE(ctx); 1869 txq = ctx->ifc_txqs; 1870 for (i = 0; i < sctx->isc_ntxqsets; i++, txq++) 1871 callout_reset_on(&txq->ift_timer, hz/2, iflib_timer, txq, 1872 txq->ift_timer.c_cpu); 1873 } 1874 1875 static int 1876 iflib_media_change(if_t ifp) 1877 { 1878 if_ctx_t ctx = if_getsoftc(ifp); 1879 int err; 1880 1881 CTX_LOCK(ctx); 1882 if ((err = IFDI_MEDIA_CHANGE(ctx)) == 0) 1883 iflib_init_locked(ctx); 1884 CTX_UNLOCK(ctx); 1885 return (err); 1886 } 1887 1888 static void 1889 iflib_media_status(if_t ifp, struct ifmediareq *ifmr) 1890 { 1891 if_ctx_t ctx = if_getsoftc(ifp); 1892 1893 CTX_LOCK(ctx); 1894 IFDI_UPDATE_ADMIN_STATUS(ctx); 1895 IFDI_MEDIA_STATUS(ctx, ifmr); 1896 CTX_UNLOCK(ctx); 1897 } 1898 1899 static void 1900 iflib_stop(if_ctx_t ctx) 1901 { 1902 iflib_txq_t txq = ctx->ifc_txqs; 1903 iflib_rxq_t rxq = ctx->ifc_rxqs; 1904 if_softc_ctx_t scctx = &ctx->ifc_softc_ctx; 1905 if_shared_ctx_t sctx = ctx->ifc_sctx; 1906 iflib_dma_info_t di; 1907 iflib_fl_t fl; 1908 int i, j; 1909 1910 /* Tell the stack that the interface is no longer active */ 1911 if_setdrvflagbits(ctx->ifc_ifp, IFF_DRV_OACTIVE, IFF_DRV_RUNNING); 1912 1913 IFDI_INTR_DISABLE(ctx); 1914 msleep(ctx, &ctx->ifc_mtx, PUSER, "iflib_init", hz); 1915 1916 /* Wait for current tx queue users to exit to disarm watchdog timer. */ 1917 for (i = 0; i < scctx->isc_ntxqsets; i++, txq++) { 1918 /* make sure all transmitters have completed before proceeding XXX */ 1919 1920 /* clean any enqueued buffers */ 1921 iflib_txq_check_drain(txq, 0); 1922 /* Free any existing tx buffers. */ 1923 for (j = 0; j < sctx->isc_ntxd; j++) { 1924 iflib_txsd_free(ctx, txq, j); 1925 } 1926 txq->ift_processed = txq->ift_cleaned = txq->ift_cidx_processed = 0; 1927 txq->ift_in_use = txq->ift_cidx = txq->ift_pidx = txq->ift_no_desc_avail = 0; 1928 txq->ift_closed = txq->ift_mbuf_defrag = txq->ift_mbuf_defrag_failed = 0; 1929 txq->ift_no_tx_dma_setup = txq->ift_txd_encap_efbig = txq->ift_map_failed = 0; 1930 txq->ift_pullups = 0; 1931 ifmp_ring_reset_stats(txq->ift_br[0]); 1932 for (j = 0, di = txq->ift_ifdi; j < ctx->ifc_nhwtxqs; j++, di++) 1933 bzero((void *)di->idi_vaddr, di->idi_size); 1934 } 1935 for (i = 0; i < scctx->isc_nrxqsets; i++, rxq++) { 1936 /* make sure all transmitters have completed before proceeding XXX */ 1937 1938 for (j = 0, di = txq->ift_ifdi; j < ctx->ifc_nhwrxqs; j++, di++) 1939 bzero((void *)di->idi_vaddr, di->idi_size); 1940 /* also resets the free lists pidx/cidx */ 1941 for (j = 0, fl = rxq->ifr_fl; j < rxq->ifr_nfl; j++, fl++) 1942 iflib_fl_bufs_free(fl); 1943 } 1944 IFDI_STOP(ctx); 1945 } 1946 1947 static iflib_rxsd_t 1948 rxd_frag_to_sd(iflib_rxq_t rxq, if_rxd_frag_t irf, int *cltype, int unload) 1949 { 1950 int flid, cidx; 1951 iflib_rxsd_t sd; 1952 iflib_fl_t fl; 1953 iflib_dma_info_t di; 1954 1955 flid = irf->irf_flid; 1956 cidx = irf->irf_idx; 1957 fl = &rxq->ifr_fl[flid]; 1958 fl->ifl_credits--; 1959 #if MEMORY_LOGGING 1960 fl->ifl_m_dequeued++; 1961 if (cltype) 1962 fl->ifl_cl_dequeued++; 1963 #endif 1964 sd = &fl->ifl_sds[cidx]; 1965 di = fl->ifl_ifdi; 1966 bus_dmamap_sync(di->idi_tag, di->idi_map, 1967 BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE); 1968 1969 /* not valid assert if bxe really does SGE from non-contiguous elements */ 1970 MPASS(fl->ifl_cidx == cidx); 1971 if (unload) 1972 bus_dmamap_unload(fl->ifl_desc_tag, sd->ifsd_map); 1973 1974 if (__predict_false(++fl->ifl_cidx == fl->ifl_size)) { 1975 fl->ifl_cidx = 0; 1976 fl->ifl_gen = 0; 1977 } 1978 /* YES ick */ 1979 if (cltype) 1980 *cltype = fl->ifl_cltype; 1981 return (sd); 1982 } 1983 1984 static struct mbuf * 1985 assemble_segments(iflib_rxq_t rxq, if_rxd_info_t ri) 1986 { 1987 int i, padlen , flags, cltype; 1988 struct mbuf *m, *mh, *mt; 1989 iflib_rxsd_t sd; 1990 caddr_t cl; 1991 1992 i = 0; 1993 do { 1994 sd = rxd_frag_to_sd(rxq, &ri->iri_frags[i], &cltype, TRUE); 1995 1996 MPASS(sd->ifsd_cl != NULL); 1997 MPASS(sd->ifsd_m != NULL); 1998 m = sd->ifsd_m; 1999 if (i == 0) { 2000 flags = M_PKTHDR|M_EXT; 2001 mh = mt = m; 2002 padlen = ri->iri_pad; 2003 } else { 2004 flags = M_EXT; 2005 mt->m_next = m; 2006 mt = m; 2007 /* assuming padding is only on the first fragment */ 2008 padlen = 0; 2009 } 2010 sd->ifsd_m = NULL; 2011 cl = sd->ifsd_cl; 2012 sd->ifsd_cl = NULL; 2013 2014 /* Can these two be made one ? */ 2015 m_init(m, M_NOWAIT, MT_DATA, flags); 2016 m_cljset(m, cl, cltype); 2017 /* 2018 * These must follow m_init and m_cljset 2019 */ 2020 m->m_data += padlen; 2021 ri->iri_len -= padlen; 2022 m->m_len = ri->iri_len; 2023 } while (++i < ri->iri_nfrags); 2024 2025 return (mh); 2026 } 2027 2028 2029 2030 /* 2031 * Process one software descriptor 2032 */ 2033 static struct mbuf * 2034 iflib_rxd_pkt_get(iflib_rxq_t rxq, if_rxd_info_t ri) 2035 { 2036 struct mbuf *m; 2037 iflib_rxsd_t sd; 2038 2039 /* should I merge this back in now that the two paths are basically duplicated? */ 2040 if (ri->iri_len <= IFLIB_RX_COPY_THRESH) { 2041 sd = rxd_frag_to_sd(rxq, &ri->iri_frags[0], NULL, FALSE); 2042 m = sd->ifsd_m; 2043 sd->ifsd_m = NULL; 2044 m_init(m, M_NOWAIT, MT_DATA, M_PKTHDR); 2045 memcpy(m->m_data, sd->ifsd_cl, ri->iri_len); 2046 m->m_len = ri->iri_len; 2047 } else { 2048 m = assemble_segments(rxq, ri); 2049 } 2050 m->m_pkthdr.len = ri->iri_len; 2051 m->m_pkthdr.rcvif = ri->iri_ifp; 2052 m->m_flags |= ri->iri_flags; 2053 m->m_pkthdr.ether_vtag = ri->iri_vtag; 2054 m->m_pkthdr.flowid = ri->iri_flowid; 2055 M_HASHTYPE_SET(m, ri->iri_rsstype); 2056 m->m_pkthdr.csum_flags = ri->iri_csum_flags; 2057 m->m_pkthdr.csum_data = ri->iri_csum_data; 2058 return (m); 2059 } 2060 2061 static bool 2062 iflib_rxeof(iflib_rxq_t rxq, int budget) 2063 { 2064 if_ctx_t ctx = rxq->ifr_ctx; 2065 if_shared_ctx_t sctx = ctx->ifc_sctx; 2066 int avail, i; 2067 uint16_t *cidxp; 2068 struct if_rxd_info ri; 2069 int err, budget_left, rx_bytes, rx_pkts; 2070 iflib_fl_t fl; 2071 struct ifnet *ifp; 2072 struct lro_entry *queued; 2073 int lro_enabled; 2074 /* 2075 * XXX early demux data packets so that if_input processing only handles 2076 * acks in interrupt context 2077 */ 2078 struct mbuf *m, *mh, *mt; 2079 2080 if (netmap_rx_irq(ctx->ifc_ifp, rxq->ifr_id, &budget)) { 2081 return (FALSE); 2082 } 2083 2084 mh = mt = NULL; 2085 MPASS(budget > 0); 2086 rx_pkts = rx_bytes = 0; 2087 if (sctx->isc_flags & IFLIB_HAS_CQ) 2088 cidxp = &rxq->ifr_cq_cidx; 2089 else 2090 cidxp = &rxq->ifr_fl[0].ifl_cidx; 2091 if ((avail = iflib_rxd_avail(ctx, rxq, *cidxp)) == 0) { 2092 for (i = 0, fl = &rxq->ifr_fl[0]; i < sctx->isc_nfl; i++, fl++) 2093 __iflib_fl_refill_lt(ctx, fl, budget + 8); 2094 DBG_COUNTER_INC(rx_unavail); 2095 return (false); 2096 } 2097 2098 for (budget_left = budget; (budget_left > 0) && (avail > 0); budget_left--, avail--) { 2099 if (__predict_false(!CTX_ACTIVE(ctx))) { 2100 DBG_COUNTER_INC(rx_ctx_inactive); 2101 break; 2102 } 2103 /* 2104 * Reset client set fields to their default values 2105 */ 2106 bzero(&ri, sizeof(ri)); 2107 ri.iri_qsidx = rxq->ifr_id; 2108 ri.iri_cidx = *cidxp; 2109 ri.iri_ifp = ctx->ifc_ifp; 2110 ri.iri_frags = rxq->ifr_frags; 2111 err = ctx->isc_rxd_pkt_get(ctx->ifc_softc, &ri); 2112 2113 /* in lieu of handling correctly - make sure it isn't being unhandled */ 2114 MPASS(err == 0); 2115 if (sctx->isc_flags & IFLIB_HAS_CQ) { 2116 /* we know we consumed _one_ CQ entry */ 2117 if (++rxq->ifr_cq_cidx == sctx->isc_nrxd) { 2118 rxq->ifr_cq_cidx = 0; 2119 rxq->ifr_cq_gen = 0; 2120 } 2121 /* was this only a completion queue message? */ 2122 if (__predict_false(ri.iri_nfrags == 0)) 2123 continue; 2124 } 2125 MPASS(ri.iri_nfrags != 0); 2126 MPASS(ri.iri_len != 0); 2127 2128 /* will advance the cidx on the corresponding free lists */ 2129 m = iflib_rxd_pkt_get(rxq, &ri); 2130 if (avail == 0 && budget_left) 2131 avail = iflib_rxd_avail(ctx, rxq, *cidxp); 2132 2133 if (__predict_false(m == NULL)) { 2134 DBG_COUNTER_INC(rx_mbuf_null); 2135 continue; 2136 } 2137 /* imm_pkt: -- cxgb */ 2138 if (mh == NULL) 2139 mh = mt = m; 2140 else { 2141 mt->m_nextpkt = m; 2142 mt = m; 2143 } 2144 } 2145 /* make sure that we can refill faster than drain */ 2146 for (i = 0, fl = &rxq->ifr_fl[0]; i < sctx->isc_nfl; i++, fl++) 2147 __iflib_fl_refill_lt(ctx, fl, budget + 8); 2148 2149 ifp = ctx->ifc_ifp; 2150 lro_enabled = (if_getcapenable(ifp) & IFCAP_LRO); 2151 2152 while (mh != NULL) { 2153 m = mh; 2154 mh = mh->m_nextpkt; 2155 m->m_nextpkt = NULL; 2156 rx_bytes += m->m_pkthdr.len; 2157 rx_pkts++; 2158 #if defined(INET6) || defined(INET) 2159 if (lro_enabled && tcp_lro_rx(&rxq->ifr_lc, m, 0) == 0) 2160 continue; 2161 #endif 2162 DBG_COUNTER_INC(rx_if_input); 2163 ifp->if_input(ifp, m); 2164 } 2165 if_inc_counter(ifp, IFCOUNTER_IBYTES, rx_bytes); 2166 if_inc_counter(ifp, IFCOUNTER_IPACKETS, rx_pkts); 2167 2168 /* 2169 * Flush any outstanding LRO work 2170 */ 2171 while ((queued = LIST_FIRST(&rxq->ifr_lc.lro_active)) != NULL) { 2172 LIST_REMOVE(queued, next); 2173 #if defined(INET6) || defined(INET) 2174 tcp_lro_flush(&rxq->ifr_lc, queued); 2175 #endif 2176 } 2177 return (iflib_rxd_avail(ctx, rxq, *cidxp)); 2178 } 2179 2180 #define M_CSUM_FLAGS(m) ((m)->m_pkthdr.csum_flags) 2181 #define M_HAS_VLANTAG(m) (m->m_flags & M_VLANTAG) 2182 #define TXQ_MAX_DB_DEFERRED(ctx) (ctx->ifc_sctx->isc_ntxd >> 5) 2183 #define TXQ_MAX_DB_CONSUMED(ctx) (ctx->ifc_sctx->isc_ntxd >> 4) 2184 2185 static __inline void 2186 iflib_txd_db_check(if_ctx_t ctx, iflib_txq_t txq, int ring) 2187 { 2188 uint32_t dbval; 2189 2190 if (ring || txq->ift_db_pending >= TXQ_MAX_DB_DEFERRED(ctx)) { 2191 2192 /* the lock will only ever be contended in the !min_latency case */ 2193 if (!TXDB_TRYLOCK(txq)) 2194 return; 2195 dbval = txq->ift_npending ? txq->ift_npending : txq->ift_pidx; 2196 ctx->isc_txd_flush(ctx->ifc_softc, txq->ift_id, dbval); 2197 txq->ift_db_pending = txq->ift_npending = 0; 2198 TXDB_UNLOCK(txq); 2199 } 2200 } 2201 2202 static void 2203 iflib_txd_deferred_db_check(void * arg) 2204 { 2205 iflib_txq_t txq = arg; 2206 2207 /* simple non-zero boolean so use bitwise OR */ 2208 if ((txq->ift_db_pending | txq->ift_npending) && 2209 txq->ift_db_pending >= txq->ift_db_pending_queued) 2210 iflib_txd_db_check(txq->ift_ctx, txq, TRUE); 2211 txq->ift_db_pending_queued = 0; 2212 if (ifmp_ring_is_stalled(txq->ift_br[0])) 2213 iflib_txq_check_drain(txq, 4); 2214 } 2215 2216 #ifdef PKT_DEBUG 2217 static void 2218 print_pkt(if_pkt_info_t pi) 2219 { 2220 printf("pi len: %d qsidx: %d nsegs: %d ndescs: %d flags: %x pidx: %d\n", 2221 pi->ipi_len, pi->ipi_qsidx, pi->ipi_nsegs, pi->ipi_ndescs, pi->ipi_flags, pi->ipi_pidx); 2222 printf("pi new_pidx: %d csum_flags: %lx tso_segsz: %d mflags: %x vtag: %d\n", 2223 pi->ipi_new_pidx, pi->ipi_csum_flags, pi->ipi_tso_segsz, pi->ipi_mflags, pi->ipi_vtag); 2224 printf("pi etype: %d ehdrlen: %d ip_hlen: %d ipproto: %d\n", 2225 pi->ipi_etype, pi->ipi_ehdrlen, pi->ipi_ip_hlen, pi->ipi_ipproto); 2226 } 2227 #endif 2228 2229 #define IS_TSO4(pi) ((pi)->ipi_csum_flags & CSUM_IP_TSO) 2230 #define IS_TSO6(pi) ((pi)->ipi_csum_flags & CSUM_IP6_TSO) 2231 2232 static int 2233 iflib_parse_header(iflib_txq_t txq, if_pkt_info_t pi, struct mbuf **mp) 2234 { 2235 struct ether_vlan_header *eh; 2236 struct mbuf *m; 2237 2238 m = *mp; 2239 /* 2240 * Determine where frame payload starts. 2241 * Jump over vlan headers if already present, 2242 * helpful for QinQ too. 2243 */ 2244 if (__predict_false(m->m_len < sizeof(*eh))) { 2245 txq->ift_pullups++; 2246 if (__predict_false((m = m_pullup(m, sizeof(*eh))) == NULL)) 2247 return (ENOMEM); 2248 } 2249 eh = mtod(m, struct ether_vlan_header *); 2250 if (eh->evl_encap_proto == htons(ETHERTYPE_VLAN)) { 2251 pi->ipi_etype = ntohs(eh->evl_proto); 2252 pi->ipi_ehdrlen = ETHER_HDR_LEN + ETHER_VLAN_ENCAP_LEN; 2253 } else { 2254 pi->ipi_etype = ntohs(eh->evl_encap_proto); 2255 pi->ipi_ehdrlen = ETHER_HDR_LEN; 2256 } 2257 2258 switch (pi->ipi_etype) { 2259 #ifdef INET 2260 case ETHERTYPE_IP: 2261 { 2262 struct ip *ip = NULL; 2263 struct tcphdr *th = NULL; 2264 struct mbuf *n; 2265 int minthlen; 2266 2267 minthlen = min(m->m_pkthdr.len, pi->ipi_ehdrlen + sizeof(*ip) + sizeof(*th)); 2268 if (__predict_false(m->m_len < minthlen)) { 2269 /* 2270 * if this code bloat is causing too much of a hit 2271 * move it to a separate function and mark it noinline 2272 */ 2273 if (m->m_len == pi->ipi_ehdrlen) { 2274 n = m->m_next; 2275 MPASS(n); 2276 if (n->m_len >= sizeof(*ip)) { 2277 ip = (struct ip *)n->m_data; 2278 if (n->m_len >= (ip->ip_hl << 2) + sizeof(*th)) 2279 th = (struct tcphdr *)((caddr_t)ip + (ip->ip_hl << 2)); 2280 } else { 2281 txq->ift_pullups++; 2282 if (__predict_false((m = m_pullup(m, minthlen)) == NULL)) 2283 return (ENOMEM); 2284 ip = (struct ip *)(m->m_data + pi->ipi_ehdrlen); 2285 } 2286 } else { 2287 txq->ift_pullups++; 2288 if (__predict_false((m = m_pullup(m, minthlen)) == NULL)) 2289 return (ENOMEM); 2290 ip = (struct ip *)(m->m_data + pi->ipi_ehdrlen); 2291 if (m->m_len >= (ip->ip_hl << 2) + sizeof(*th)) 2292 th = (struct tcphdr *)((caddr_t)ip + (ip->ip_hl << 2)); 2293 } 2294 } else { 2295 ip = (struct ip *)(m->m_data + pi->ipi_ehdrlen); 2296 if (m->m_len >= (ip->ip_hl << 2) + sizeof(*th)) 2297 th = (struct tcphdr *)((caddr_t)ip + (ip->ip_hl << 2)); 2298 } 2299 pi->ipi_ip_hlen = ip->ip_hl << 2; 2300 pi->ipi_ipproto = ip->ip_p; 2301 pi->ipi_flags |= IPI_TX_IPV4; 2302 2303 if (pi->ipi_csum_flags & CSUM_IP) 2304 ip->ip_sum = 0; 2305 2306 if (pi->ipi_ipproto == IPPROTO_TCP) { 2307 if (__predict_false(th == NULL)) { 2308 txq->ift_pullups++; 2309 if (__predict_false((m = m_pullup(m, (ip->ip_hl << 2) + sizeof(*th))) == NULL)) 2310 return (ENOMEM); 2311 th = (struct tcphdr *)((caddr_t)ip + pi->ipi_ip_hlen); 2312 } 2313 pi->ipi_tcp_hflags = th->th_flags; 2314 pi->ipi_tcp_hlen = th->th_off << 2; 2315 pi->ipi_tcp_seq = th->th_seq; 2316 } 2317 if (IS_TSO4(pi)) { 2318 if (__predict_false(ip->ip_p != IPPROTO_TCP)) 2319 return (ENXIO); 2320 th->th_sum = in_pseudo(ip->ip_src.s_addr, 2321 ip->ip_dst.s_addr, htons(IPPROTO_TCP)); 2322 pi->ipi_tso_segsz = m->m_pkthdr.tso_segsz; 2323 } 2324 break; 2325 } 2326 #endif 2327 #ifdef INET6 2328 case ETHERTYPE_IPV6: 2329 { 2330 struct ip6_hdr *ip6 = (struct ip6_hdr *)(m->m_data + pi->ipi_ehdrlen); 2331 struct tcphdr *th; 2332 pi->ipi_ip_hlen = sizeof(struct ip6_hdr); 2333 2334 if (__predict_false(m->m_len < pi->ipi_ehdrlen + sizeof(struct ip6_hdr))) { 2335 if (__predict_false((m = m_pullup(m, pi->ipi_ehdrlen + sizeof(struct ip6_hdr))) == NULL)) 2336 return (ENOMEM); 2337 } 2338 th = (struct tcphdr *)((caddr_t)ip6 + pi->ipi_ip_hlen); 2339 2340 /* XXX-BZ this will go badly in case of ext hdrs. */ 2341 pi->ipi_ipproto = ip6->ip6_nxt; 2342 pi->ipi_flags |= IPI_TX_IPV6; 2343 2344 if (pi->ipi_ipproto == IPPROTO_TCP) { 2345 if (__predict_false(m->m_len < pi->ipi_ehdrlen + sizeof(struct ip6_hdr) + sizeof(struct tcphdr))) { 2346 if (__predict_false((m = m_pullup(m, pi->ipi_ehdrlen + sizeof(struct ip6_hdr) + sizeof(struct tcphdr))) == NULL)) 2347 return (ENOMEM); 2348 } 2349 pi->ipi_tcp_hflags = th->th_flags; 2350 pi->ipi_tcp_hlen = th->th_off << 2; 2351 } 2352 if (IS_TSO6(pi)) { 2353 2354 if (__predict_false(ip6->ip6_nxt != IPPROTO_TCP)) 2355 return (ENXIO); 2356 /* 2357 * The corresponding flag is set by the stack in the IPv4 2358 * TSO case, but not in IPv6 (at least in FreeBSD 10.2). 2359 * So, set it here because the rest of the flow requires it. 2360 */ 2361 pi->ipi_csum_flags |= CSUM_TCP_IPV6; 2362 th->th_sum = in6_cksum_pseudo(ip6, 0, IPPROTO_TCP, 0); 2363 pi->ipi_tso_segsz = m->m_pkthdr.tso_segsz; 2364 } 2365 break; 2366 } 2367 #endif 2368 default: 2369 pi->ipi_csum_flags &= ~CSUM_OFFLOAD; 2370 pi->ipi_ip_hlen = 0; 2371 break; 2372 } 2373 *mp = m; 2374 return (0); 2375 } 2376 2377 2378 static __noinline struct mbuf * 2379 collapse_pkthdr(struct mbuf *m0) 2380 { 2381 struct mbuf *m, *m_next, *tmp; 2382 2383 m = m0; 2384 m_next = m->m_next; 2385 while (m_next != NULL && m_next->m_len == 0) { 2386 m = m_next; 2387 m->m_next = NULL; 2388 m_free(m); 2389 m_next = m_next->m_next; 2390 } 2391 m = m0; 2392 m->m_next = m_next; 2393 if ((m_next->m_flags & M_EXT) == 0) { 2394 m = m_defrag(m, M_NOWAIT); 2395 } else { 2396 tmp = m_next->m_next; 2397 memcpy(m_next, m, MPKTHSIZE); 2398 m = m_next; 2399 m->m_next = tmp; 2400 } 2401 return (m); 2402 } 2403 2404 /* 2405 * If dodgy hardware rejects the scatter gather chain we've handed it 2406 * we'll need to rebuild the mbuf chain before we can call m_defrag 2407 */ 2408 static __noinline struct mbuf * 2409 iflib_rebuild_mbuf(iflib_txq_t txq) 2410 { 2411 2412 int ntxd, mhlen, len, i, pidx; 2413 struct mbuf *m, *mh, **ifsd_m; 2414 if_shared_ctx_t sctx; 2415 2416 pidx = txq->ift_pidx; 2417 ifsd_m = txq->ift_sds.ifsd_m; 2418 sctx = txq->ift_ctx->ifc_sctx; 2419 ntxd = sctx->isc_ntxd; 2420 mh = m = ifsd_m[pidx]; 2421 ifsd_m[pidx] = NULL; 2422 #if MEMORY_LOGGING 2423 txq->ift_dequeued++; 2424 #endif 2425 len = m->m_len; 2426 mhlen = m->m_pkthdr.len; 2427 i = 1; 2428 2429 while (len < mhlen && (m->m_next == NULL)) { 2430 m->m_next = ifsd_m[(pidx + i) & (ntxd-1)]; 2431 ifsd_m[(pidx + i) & (ntxd -1)] = NULL; 2432 #if MEMORY_LOGGING 2433 txq->ift_dequeued++; 2434 #endif 2435 m = m->m_next; 2436 len += m->m_len; 2437 i++; 2438 } 2439 return (mh); 2440 } 2441 2442 static int 2443 iflib_busdma_load_mbuf_sg(iflib_txq_t txq, bus_dma_tag_t tag, bus_dmamap_t map, 2444 struct mbuf **m0, bus_dma_segment_t *segs, int *nsegs, 2445 int max_segs, int flags) 2446 { 2447 if_ctx_t ctx; 2448 if_shared_ctx_t sctx; 2449 int i, next, pidx, mask, err, maxsegsz, ntxd, count; 2450 struct mbuf *m, *tmp, **ifsd_m, **mp; 2451 2452 m = *m0; 2453 2454 /* 2455 * Please don't ever do this 2456 */ 2457 if (__predict_false(m->m_len == 0)) 2458 *m0 = m = collapse_pkthdr(m); 2459 2460 ctx = txq->ift_ctx; 2461 sctx = ctx->ifc_sctx; 2462 ifsd_m = txq->ift_sds.ifsd_m; 2463 ntxd = sctx->isc_ntxd; 2464 pidx = txq->ift_pidx; 2465 if (map != NULL) { 2466 uint8_t *ifsd_flags = txq->ift_sds.ifsd_flags; 2467 2468 err = bus_dmamap_load_mbuf_sg(tag, map, 2469 *m0, segs, nsegs, BUS_DMA_NOWAIT); 2470 if (err) 2471 return (err); 2472 ifsd_flags[pidx] |= TX_SW_DESC_MAPPED; 2473 i = 0; 2474 next = pidx; 2475 mask = (sctx->isc_ntxd-1); 2476 m = *m0; 2477 do { 2478 mp = &ifsd_m[next]; 2479 *mp = m; 2480 m = m->m_next; 2481 (*mp)->m_next = NULL; 2482 if (__predict_false((*mp)->m_len == 0)) { 2483 m_free(*mp); 2484 *mp = NULL; 2485 } else 2486 next = (pidx + i) & (ntxd-1); 2487 } while (m != NULL); 2488 } else { 2489 int buflen, sgsize, max_sgsize; 2490 vm_offset_t vaddr; 2491 vm_paddr_t curaddr; 2492 2493 count = i = 0; 2494 maxsegsz = sctx->isc_tx_maxsize; 2495 m = *m0; 2496 do { 2497 if (__predict_false(m->m_len <= 0)) { 2498 tmp = m; 2499 m = m->m_next; 2500 tmp->m_next = NULL; 2501 m_free(tmp); 2502 continue; 2503 } 2504 buflen = m->m_len; 2505 vaddr = (vm_offset_t)m->m_data; 2506 /* 2507 * see if we can't be smarter about physically 2508 * contiguous mappings 2509 */ 2510 next = (pidx + count) & (ntxd-1); 2511 MPASS(ifsd_m[next] == NULL); 2512 #if MEMORY_LOGGING 2513 txq->ift_enqueued++; 2514 #endif 2515 ifsd_m[next] = m; 2516 while (buflen > 0) { 2517 max_sgsize = MIN(buflen, maxsegsz); 2518 curaddr = pmap_kextract(vaddr); 2519 sgsize = PAGE_SIZE - (curaddr & PAGE_MASK); 2520 sgsize = MIN(sgsize, max_sgsize); 2521 segs[i].ds_addr = curaddr; 2522 segs[i].ds_len = sgsize; 2523 vaddr += sgsize; 2524 buflen -= sgsize; 2525 i++; 2526 if (i >= max_segs) 2527 goto err; 2528 } 2529 count++; 2530 tmp = m; 2531 m = m->m_next; 2532 tmp->m_next = NULL; 2533 } while (m != NULL); 2534 *nsegs = i; 2535 } 2536 return (0); 2537 err: 2538 *m0 = iflib_rebuild_mbuf(txq); 2539 return (EFBIG); 2540 } 2541 2542 static int 2543 iflib_encap(iflib_txq_t txq, struct mbuf **m_headp) 2544 { 2545 if_ctx_t ctx; 2546 if_shared_ctx_t sctx; 2547 if_softc_ctx_t scctx; 2548 bus_dma_segment_t *segs; 2549 struct mbuf *m_head; 2550 bus_dmamap_t map; 2551 struct if_pkt_info pi; 2552 int remap = 0; 2553 int err, nsegs, ndesc, max_segs, pidx, cidx, next, ntxd; 2554 bus_dma_tag_t desc_tag; 2555 2556 segs = txq->ift_segs; 2557 ctx = txq->ift_ctx; 2558 sctx = ctx->ifc_sctx; 2559 scctx = &ctx->ifc_softc_ctx; 2560 segs = txq->ift_segs; 2561 ntxd = sctx->isc_ntxd; 2562 m_head = *m_headp; 2563 map = NULL; 2564 2565 /* 2566 * If we're doing TSO the next descriptor to clean may be quite far ahead 2567 */ 2568 cidx = txq->ift_cidx; 2569 pidx = txq->ift_pidx; 2570 next = (cidx + CACHE_PTR_INCREMENT) & (ntxd-1); 2571 2572 /* prefetch the next cache line of mbuf pointers and flags */ 2573 prefetch(&txq->ift_sds.ifsd_m[next]); 2574 if (txq->ift_sds.ifsd_map != NULL) { 2575 prefetch(&txq->ift_sds.ifsd_map[next]); 2576 map = txq->ift_sds.ifsd_map[pidx]; 2577 next = (cidx + CACHE_LINE_SIZE) & (ntxd-1); 2578 prefetch(&txq->ift_sds.ifsd_flags[next]); 2579 } 2580 2581 2582 if (m_head->m_pkthdr.csum_flags & CSUM_TSO) { 2583 desc_tag = txq->ift_tso_desc_tag; 2584 max_segs = scctx->isc_tx_tso_segments_max; 2585 } else { 2586 desc_tag = txq->ift_desc_tag; 2587 max_segs = scctx->isc_tx_nsegments; 2588 } 2589 m_head = *m_headp; 2590 bzero(&pi, sizeof(pi)); 2591 pi.ipi_len = m_head->m_pkthdr.len; 2592 pi.ipi_mflags = (m_head->m_flags & (M_VLANTAG|M_BCAST|M_MCAST)); 2593 pi.ipi_csum_flags = m_head->m_pkthdr.csum_flags; 2594 pi.ipi_vtag = (m_head->m_flags & M_VLANTAG) ? m_head->m_pkthdr.ether_vtag : 0; 2595 pi.ipi_pidx = pidx; 2596 pi.ipi_qsidx = txq->ift_id; 2597 2598 /* deliberate bitwise OR to make one condition */ 2599 if (__predict_true((pi.ipi_csum_flags | pi.ipi_vtag))) { 2600 if (__predict_false((err = iflib_parse_header(txq, &pi, m_headp)) != 0)) 2601 return (err); 2602 m_head = *m_headp; 2603 } 2604 2605 retry: 2606 err = iflib_busdma_load_mbuf_sg(txq, desc_tag, map, m_headp, segs, &nsegs, max_segs, BUS_DMA_NOWAIT); 2607 defrag: 2608 if (__predict_false(err)) { 2609 switch (err) { 2610 case EFBIG: 2611 /* try collapse once and defrag once */ 2612 if (remap == 0) 2613 m_head = m_collapse(*m_headp, M_NOWAIT, max_segs); 2614 if (remap == 1) 2615 m_head = m_defrag(*m_headp, M_NOWAIT); 2616 remap++; 2617 if (__predict_false(m_head == NULL)) 2618 goto defrag_failed; 2619 txq->ift_mbuf_defrag++; 2620 *m_headp = m_head; 2621 goto retry; 2622 break; 2623 case ENOMEM: 2624 txq->ift_no_tx_dma_setup++; 2625 break; 2626 default: 2627 txq->ift_no_tx_dma_setup++; 2628 m_freem(*m_headp); 2629 DBG_COUNTER_INC(tx_frees); 2630 *m_headp = NULL; 2631 break; 2632 } 2633 txq->ift_map_failed++; 2634 DBG_COUNTER_INC(encap_load_mbuf_fail); 2635 return (err); 2636 } 2637 2638 /* 2639 * XXX assumes a 1 to 1 relationship between segments and 2640 * descriptors - this does not hold true on all drivers, e.g. 2641 * cxgb 2642 */ 2643 if (__predict_false(nsegs + 2 > TXQ_AVAIL(txq))) { 2644 txq->ift_no_desc_avail++; 2645 if (map != NULL) 2646 bus_dmamap_unload(desc_tag, map); 2647 DBG_COUNTER_INC(encap_txq_avail_fail); 2648 if (txq->ift_task.gt_task.ta_pending == 0) 2649 GROUPTASK_ENQUEUE(&txq->ift_task); 2650 return (ENOBUFS); 2651 } 2652 pi.ipi_segs = segs; 2653 pi.ipi_nsegs = nsegs; 2654 2655 MPASS(pidx >= 0 && pidx < sctx->isc_ntxd); 2656 #ifdef PKT_DEBUG 2657 print_pkt(&pi); 2658 #endif 2659 if ((err = ctx->isc_txd_encap(ctx->ifc_softc, &pi)) == 0) { 2660 bus_dmamap_sync(txq->ift_ifdi->idi_tag, txq->ift_ifdi->idi_map, 2661 BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); 2662 2663 DBG_COUNTER_INC(tx_encap); 2664 MPASS(pi.ipi_new_pidx >= 0 && pi.ipi_new_pidx < sctx->isc_ntxd); 2665 2666 ndesc = pi.ipi_new_pidx - pi.ipi_pidx; 2667 if (pi.ipi_new_pidx < pi.ipi_pidx) { 2668 ndesc += sctx->isc_ntxd; 2669 txq->ift_gen = 1; 2670 } 2671 MPASS(pi.ipi_new_pidx != pidx); 2672 MPASS(ndesc > 0); 2673 txq->ift_in_use += ndesc; 2674 /* 2675 * We update the last software descriptor again here because there may 2676 * be a sentinel and/or there may be more mbufs than segments 2677 */ 2678 txq->ift_pidx = pi.ipi_new_pidx; 2679 txq->ift_npending += pi.ipi_ndescs; 2680 } else if (__predict_false(err == EFBIG && remap < 2)) { 2681 *m_headp = m_head = iflib_rebuild_mbuf(txq); 2682 remap = 1; 2683 txq->ift_txd_encap_efbig++; 2684 goto defrag; 2685 } else 2686 DBG_COUNTER_INC(encap_txd_encap_fail); 2687 return (err); 2688 2689 defrag_failed: 2690 txq->ift_mbuf_defrag_failed++; 2691 txq->ift_map_failed++; 2692 m_freem(*m_headp); 2693 DBG_COUNTER_INC(tx_frees); 2694 *m_headp = NULL; 2695 return (ENOMEM); 2696 } 2697 2698 /* forward compatibility for cxgb */ 2699 #define FIRST_QSET(ctx) 0 2700 2701 #define NTXQSETS(ctx) ((ctx)->ifc_softc_ctx.isc_ntxqsets) 2702 #define NRXQSETS(ctx) ((ctx)->ifc_softc_ctx.isc_nrxqsets) 2703 #define QIDX(ctx, m) ((((m)->m_pkthdr.flowid & ctx->ifc_softc_ctx.isc_rss_table_mask) % NRXQSETS(ctx)) + FIRST_QSET(ctx)) 2704 #define DESC_RECLAIMABLE(q) ((int)((q)->ift_processed - (q)->ift_cleaned - (q)->ift_ctx->ifc_softc_ctx.isc_tx_nsegments)) 2705 #define RECLAIM_THRESH(ctx) ((ctx)->ifc_sctx->isc_tx_reclaim_thresh) 2706 #define MAX_TX_DESC(ctx) ((ctx)->ifc_softc_ctx.isc_tx_tso_segments_max) 2707 2708 2709 2710 /* if there are more than TXQ_MIN_OCCUPANCY packets pending we consider deferring 2711 * doorbell writes 2712 * 2713 * ORing with 2 assures that min occupancy is never less than 2 without any conditional logic 2714 */ 2715 #define TXQ_MIN_OCCUPANCY(ctx) ((ctx->ifc_sctx->isc_ntxd >> 6)| 0x2) 2716 2717 static inline int 2718 iflib_txq_min_occupancy(iflib_txq_t txq) 2719 { 2720 if_ctx_t ctx; 2721 2722 ctx = txq->ift_ctx; 2723 return (get_inuse(txq->ift_size, txq->ift_cidx, txq->ift_pidx, txq->ift_gen) < TXQ_MIN_OCCUPANCY(ctx) + MAX_TX_DESC(ctx)); 2724 } 2725 2726 static void 2727 iflib_tx_desc_free(iflib_txq_t txq, int n) 2728 { 2729 int hasmap; 2730 uint32_t qsize, cidx, mask, gen; 2731 struct mbuf *m, **ifsd_m; 2732 uint8_t *ifsd_flags; 2733 bus_dmamap_t *ifsd_map; 2734 2735 cidx = txq->ift_cidx; 2736 gen = txq->ift_gen; 2737 qsize = txq->ift_ctx->ifc_sctx->isc_ntxd; 2738 mask = qsize-1; 2739 hasmap = txq->ift_sds.ifsd_map != NULL; 2740 ifsd_flags = txq->ift_sds.ifsd_flags; 2741 ifsd_m = txq->ift_sds.ifsd_m; 2742 ifsd_map = txq->ift_sds.ifsd_map; 2743 2744 while (n--) { 2745 prefetch(ifsd_m[(cidx + 3) & mask]); 2746 prefetch(ifsd_m[(cidx + 4) & mask]); 2747 2748 if (ifsd_m[cidx] != NULL) { 2749 prefetch(&ifsd_m[(cidx + CACHE_PTR_INCREMENT) & mask]); 2750 prefetch(&ifsd_flags[(cidx + CACHE_PTR_INCREMENT) & mask]); 2751 if (hasmap && (ifsd_flags[cidx] & TX_SW_DESC_MAPPED)) { 2752 /* 2753 * does it matter if it's not the TSO tag? If so we'll 2754 * have to add the type to flags 2755 */ 2756 bus_dmamap_unload(txq->ift_desc_tag, ifsd_map[cidx]); 2757 ifsd_flags[cidx] &= ~TX_SW_DESC_MAPPED; 2758 } 2759 if ((m = ifsd_m[cidx]) != NULL) { 2760 /* XXX we don't support any drivers that batch packets yet */ 2761 MPASS(m->m_nextpkt == NULL); 2762 2763 m_freem(m); 2764 ifsd_m[cidx] = NULL; 2765 #if MEMORY_LOGGING 2766 txq->ift_dequeued++; 2767 #endif 2768 DBG_COUNTER_INC(tx_frees); 2769 } 2770 } 2771 if (__predict_false(++cidx == qsize)) { 2772 cidx = 0; 2773 gen = 0; 2774 } 2775 } 2776 txq->ift_cidx = cidx; 2777 txq->ift_gen = gen; 2778 } 2779 2780 static __inline int 2781 iflib_completed_tx_reclaim(iflib_txq_t txq, int thresh) 2782 { 2783 int reclaim; 2784 if_ctx_t ctx = txq->ift_ctx; 2785 2786 KASSERT(thresh >= 0, ("invalid threshold to reclaim")); 2787 MPASS(thresh /*+ MAX_TX_DESC(txq->ift_ctx) */ < txq->ift_size); 2788 2789 /* 2790 * Need a rate-limiting check so that this isn't called every time 2791 */ 2792 iflib_tx_credits_update(ctx, txq); 2793 reclaim = DESC_RECLAIMABLE(txq); 2794 2795 if (reclaim <= thresh /* + MAX_TX_DESC(txq->ift_ctx) */) { 2796 #ifdef INVARIANTS 2797 if (iflib_verbose_debug) { 2798 printf("%s processed=%ju cleaned=%ju tx_nsegments=%d reclaim=%d thresh=%d\n", __FUNCTION__, 2799 txq->ift_processed, txq->ift_cleaned, txq->ift_ctx->ifc_softc_ctx.isc_tx_nsegments, 2800 reclaim, thresh); 2801 2802 } 2803 #endif 2804 return (0); 2805 } 2806 iflib_tx_desc_free(txq, reclaim); 2807 txq->ift_cleaned += reclaim; 2808 txq->ift_in_use -= reclaim; 2809 2810 if (txq->ift_active == FALSE) 2811 txq->ift_active = TRUE; 2812 2813 return (reclaim); 2814 } 2815 2816 static struct mbuf ** 2817 _ring_peek_one(struct ifmp_ring *r, int cidx, int offset) 2818 { 2819 2820 return (__DEVOLATILE(struct mbuf **, &r->items[(cidx + offset) & (r->size-1)])); 2821 } 2822 2823 static void 2824 iflib_txq_check_drain(iflib_txq_t txq, int budget) 2825 { 2826 2827 ifmp_ring_check_drainage(txq->ift_br[0], budget); 2828 } 2829 2830 static uint32_t 2831 iflib_txq_can_drain(struct ifmp_ring *r) 2832 { 2833 iflib_txq_t txq = r->cookie; 2834 if_ctx_t ctx = txq->ift_ctx; 2835 2836 return ((TXQ_AVAIL(txq) >= MAX_TX_DESC(ctx)) || 2837 ctx->isc_txd_credits_update(ctx->ifc_softc, txq->ift_id, txq->ift_cidx_processed, false)); 2838 } 2839 2840 static uint32_t 2841 iflib_txq_drain(struct ifmp_ring *r, uint32_t cidx, uint32_t pidx) 2842 { 2843 iflib_txq_t txq = r->cookie; 2844 if_ctx_t ctx = txq->ift_ctx; 2845 if_t ifp = ctx->ifc_ifp; 2846 struct mbuf **mp, *m; 2847 int i, count, consumed, pkt_sent, bytes_sent, mcast_sent, avail, err, in_use_prev, desc_used; 2848 2849 if (__predict_false(!(if_getdrvflags(ifp) & IFF_DRV_RUNNING) || 2850 !LINK_ACTIVE(ctx))) { 2851 DBG_COUNTER_INC(txq_drain_notready); 2852 return (0); 2853 } 2854 2855 avail = IDXDIFF(pidx, cidx, r->size); 2856 if (__predict_false(ctx->ifc_flags & IFC_QFLUSH)) { 2857 DBG_COUNTER_INC(txq_drain_flushing); 2858 for (i = 0; i < avail; i++) { 2859 m_freem(r->items[(cidx + i) & (r->size-1)]); 2860 r->items[(cidx + i) & (r->size-1)] = NULL; 2861 } 2862 return (avail); 2863 } 2864 iflib_completed_tx_reclaim(txq, RECLAIM_THRESH(ctx)); 2865 if (__predict_false(if_getdrvflags(ctx->ifc_ifp) & IFF_DRV_OACTIVE)) { 2866 txq->ift_qstatus = IFLIB_QUEUE_IDLE; 2867 CALLOUT_LOCK(txq); 2868 callout_stop(&txq->ift_timer); 2869 callout_stop(&txq->ift_db_check); 2870 CALLOUT_UNLOCK(txq); 2871 DBG_COUNTER_INC(txq_drain_oactive); 2872 return (0); 2873 } 2874 consumed = mcast_sent = bytes_sent = pkt_sent = 0; 2875 count = MIN(avail, TX_BATCH_SIZE); 2876 2877 for (desc_used = i = 0; i < count && TXQ_AVAIL(txq) > MAX_TX_DESC(ctx) + 2; i++) { 2878 mp = _ring_peek_one(r, cidx, i); 2879 in_use_prev = txq->ift_in_use; 2880 err = iflib_encap(txq, mp); 2881 /* 2882 * What other errors should we bail out for? 2883 */ 2884 if (err == ENOBUFS) { 2885 DBG_COUNTER_INC(txq_drain_encapfail); 2886 break; 2887 } 2888 consumed++; 2889 if (err) 2890 continue; 2891 2892 pkt_sent++; 2893 m = *mp; 2894 DBG_COUNTER_INC(tx_sent); 2895 bytes_sent += m->m_pkthdr.len; 2896 if (m->m_flags & M_MCAST) 2897 mcast_sent++; 2898 2899 txq->ift_db_pending += (txq->ift_in_use - in_use_prev); 2900 desc_used += (txq->ift_in_use - in_use_prev); 2901 iflib_txd_db_check(ctx, txq, FALSE); 2902 ETHER_BPF_MTAP(ifp, m); 2903 if (__predict_false(!(if_getdrvflags(ctx->ifc_ifp) & IFF_DRV_RUNNING))) 2904 break; 2905 2906 if (desc_used > TXQ_MAX_DB_CONSUMED(ctx)) 2907 break; 2908 } 2909 2910 if ((iflib_min_tx_latency || iflib_txq_min_occupancy(txq)) && txq->ift_db_pending) 2911 iflib_txd_db_check(ctx, txq, TRUE); 2912 else if ((txq->ift_db_pending || TXQ_AVAIL(txq) < MAX_TX_DESC(ctx)) && 2913 (callout_pending(&txq->ift_db_check) == 0)) { 2914 txq->ift_db_pending_queued = txq->ift_db_pending; 2915 callout_reset_on(&txq->ift_db_check, 1, iflib_txd_deferred_db_check, 2916 txq, txq->ift_db_check.c_cpu); 2917 } 2918 if_inc_counter(ifp, IFCOUNTER_OBYTES, bytes_sent); 2919 if_inc_counter(ifp, IFCOUNTER_OPACKETS, pkt_sent); 2920 if (mcast_sent) 2921 if_inc_counter(ifp, IFCOUNTER_OMCASTS, mcast_sent); 2922 2923 return (consumed); 2924 } 2925 2926 static void 2927 _task_fn_tx(void *context, int pending) 2928 { 2929 iflib_txq_t txq = context; 2930 if_ctx_t ctx = txq->ift_ctx; 2931 2932 if (!(if_getdrvflags(ctx->ifc_ifp) & IFF_DRV_RUNNING)) 2933 return; 2934 ifmp_ring_check_drainage(txq->ift_br[0], TX_BATCH_SIZE); 2935 } 2936 2937 static void 2938 _task_fn_rx(void *context, int pending) 2939 { 2940 iflib_rxq_t rxq = context; 2941 if_ctx_t ctx = rxq->ifr_ctx; 2942 bool more; 2943 2944 DBG_COUNTER_INC(task_fn_rxs); 2945 if (__predict_false(!(if_getdrvflags(ctx->ifc_ifp) & IFF_DRV_RUNNING))) 2946 return; 2947 2948 if ((more = iflib_rxeof(rxq, 16 /* XXX */)) == false) { 2949 if (ctx->ifc_flags & IFC_LEGACY) 2950 IFDI_INTR_ENABLE(ctx); 2951 else { 2952 DBG_COUNTER_INC(rx_intr_enables); 2953 IFDI_QUEUE_INTR_ENABLE(ctx, rxq->ifr_id); 2954 } 2955 } 2956 if (__predict_false(!(if_getdrvflags(ctx->ifc_ifp) & IFF_DRV_RUNNING))) 2957 return; 2958 if (more) 2959 GROUPTASK_ENQUEUE(&rxq->ifr_task); 2960 } 2961 2962 static void 2963 _task_fn_admin(void *context, int pending) 2964 { 2965 if_ctx_t ctx = context; 2966 if_softc_ctx_t sctx = &ctx->ifc_softc_ctx; 2967 iflib_txq_t txq; 2968 int i; 2969 2970 if (!(if_getdrvflags(ctx->ifc_ifp) & IFF_DRV_RUNNING)) 2971 return; 2972 2973 CTX_LOCK(ctx); 2974 for (txq = ctx->ifc_txqs, i = 0; i < sctx->isc_ntxqsets; i++, txq++) { 2975 CALLOUT_LOCK(txq); 2976 callout_stop(&txq->ift_timer); 2977 CALLOUT_UNLOCK(txq); 2978 } 2979 IFDI_UPDATE_ADMIN_STATUS(ctx); 2980 for (txq = ctx->ifc_txqs, i = 0; i < sctx->isc_ntxqsets; i++, txq++) 2981 callout_reset_on(&txq->ift_timer, hz/2, iflib_timer, txq, txq->ift_timer.c_cpu); 2982 IFDI_LINK_INTR_ENABLE(ctx); 2983 CTX_UNLOCK(ctx); 2984 2985 if (LINK_ACTIVE(ctx) == 0) 2986 return; 2987 for (txq = ctx->ifc_txqs, i = 0; i < sctx->isc_ntxqsets; i++, txq++) 2988 iflib_txq_check_drain(txq, IFLIB_RESTART_BUDGET); 2989 } 2990 2991 2992 static void 2993 _task_fn_iov(void *context, int pending) 2994 { 2995 if_ctx_t ctx = context; 2996 2997 if (!(if_getdrvflags(ctx->ifc_ifp) & IFF_DRV_RUNNING)) 2998 return; 2999 3000 CTX_LOCK(ctx); 3001 IFDI_VFLR_HANDLE(ctx); 3002 CTX_UNLOCK(ctx); 3003 } 3004 3005 static int 3006 iflib_sysctl_int_delay(SYSCTL_HANDLER_ARGS) 3007 { 3008 int err; 3009 if_int_delay_info_t info; 3010 if_ctx_t ctx; 3011 3012 info = (if_int_delay_info_t)arg1; 3013 ctx = info->iidi_ctx; 3014 info->iidi_req = req; 3015 info->iidi_oidp = oidp; 3016 CTX_LOCK(ctx); 3017 err = IFDI_SYSCTL_INT_DELAY(ctx, info); 3018 CTX_UNLOCK(ctx); 3019 return (err); 3020 } 3021 3022 /********************************************************************* 3023 * 3024 * IFNET FUNCTIONS 3025 * 3026 **********************************************************************/ 3027 3028 static void 3029 iflib_if_init_locked(if_ctx_t ctx) 3030 { 3031 iflib_stop(ctx); 3032 iflib_init_locked(ctx); 3033 } 3034 3035 3036 static void 3037 iflib_if_init(void *arg) 3038 { 3039 if_ctx_t ctx = arg; 3040 3041 CTX_LOCK(ctx); 3042 iflib_if_init_locked(ctx); 3043 CTX_UNLOCK(ctx); 3044 } 3045 3046 static int 3047 iflib_if_transmit(if_t ifp, struct mbuf *m) 3048 { 3049 if_ctx_t ctx = if_getsoftc(ifp); 3050 3051 iflib_txq_t txq; 3052 struct mbuf *marr[8], **mp, *next; 3053 int err, i, count, qidx; 3054 3055 if (__predict_false((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0 || !LINK_ACTIVE(ctx))) { 3056 DBG_COUNTER_INC(tx_frees); 3057 m_freem(m); 3058 return (0); 3059 } 3060 3061 qidx = 0; 3062 if ((NTXQSETS(ctx) > 1) && M_HASHTYPE_GET(m)) 3063 qidx = QIDX(ctx, m); 3064 /* 3065 * XXX calculate buf_ring based on flowid (divvy up bits?) 3066 */ 3067 txq = &ctx->ifc_txqs[qidx]; 3068 3069 #ifdef DRIVER_BACKPRESSURE 3070 if (txq->ift_closed) { 3071 while (m != NULL) { 3072 next = m->m_nextpkt; 3073 m->m_nextpkt = NULL; 3074 m_freem(m); 3075 m = next; 3076 } 3077 return (ENOBUFS); 3078 } 3079 #endif 3080 qidx = count = 0; 3081 mp = marr; 3082 next = m; 3083 do { 3084 count++; 3085 next = next->m_nextpkt; 3086 } while (next != NULL); 3087 3088 if (count > nitems(marr)) 3089 if ((mp = malloc(count*sizeof(struct mbuf *), M_IFLIB, M_NOWAIT)) == NULL) { 3090 /* XXX check nextpkt */ 3091 m_freem(m); 3092 /* XXX simplify for now */ 3093 DBG_COUNTER_INC(tx_frees); 3094 return (ENOBUFS); 3095 } 3096 for (next = m, i = 0; next != NULL; i++) { 3097 mp[i] = next; 3098 next = next->m_nextpkt; 3099 mp[i]->m_nextpkt = NULL; 3100 } 3101 DBG_COUNTER_INC(tx_seen); 3102 err = ifmp_ring_enqueue(txq->ift_br[0], (void **)mp, count, TX_BATCH_SIZE); 3103 3104 if (iflib_txq_can_drain(txq->ift_br[0])) 3105 GROUPTASK_ENQUEUE(&txq->ift_task); 3106 if (err) { 3107 /* support forthcoming later */ 3108 #ifdef DRIVER_BACKPRESSURE 3109 txq->ift_closed = TRUE; 3110 #endif 3111 for (i = 0; i < count; i++) 3112 m_freem(mp[i]); 3113 ifmp_ring_check_drainage(txq->ift_br[0], TX_BATCH_SIZE); 3114 } 3115 if (count > nitems(marr)) 3116 free(mp, M_IFLIB); 3117 3118 return (err); 3119 } 3120 3121 static void 3122 iflib_if_qflush(if_t ifp) 3123 { 3124 if_ctx_t ctx = if_getsoftc(ifp); 3125 iflib_txq_t txq = ctx->ifc_txqs; 3126 int i; 3127 3128 CTX_LOCK(ctx); 3129 ctx->ifc_flags |= IFC_QFLUSH; 3130 CTX_UNLOCK(ctx); 3131 for (i = 0; i < NTXQSETS(ctx); i++, txq++) 3132 while (!(ifmp_ring_is_idle(txq->ift_br[0]) || ifmp_ring_is_stalled(txq->ift_br[0]))) 3133 iflib_txq_check_drain(txq, 0); 3134 CTX_LOCK(ctx); 3135 ctx->ifc_flags &= ~IFC_QFLUSH; 3136 CTX_UNLOCK(ctx); 3137 3138 if_qflush(ifp); 3139 } 3140 3141 #define IFCAP_REINIT (IFCAP_HWCSUM|IFCAP_TSO4|IFCAP_TSO6|IFCAP_VLAN_HWTAGGING|IFCAP_VLAN_MTU | \ 3142 IFCAP_VLAN_HWFILTER | IFCAP_VLAN_HWTSO) 3143 3144 #define IFCAP_FLAGS (IFCAP_RXCSUM | IFCAP_RXCSUM_IPV6 | IFCAP_HWCSUM | IFCAP_LRO | \ 3145 IFCAP_TSO4 | IFCAP_TSO6 | IFCAP_VLAN_HWTAGGING | \ 3146 IFCAP_VLAN_MTU | IFCAP_VLAN_HWFILTER | IFCAP_VLAN_HWTSO) 3147 3148 static int 3149 iflib_if_ioctl(if_t ifp, u_long command, caddr_t data) 3150 { 3151 if_ctx_t ctx = if_getsoftc(ifp); 3152 struct ifreq *ifr = (struct ifreq *)data; 3153 #if defined(INET) || defined(INET6) 3154 struct ifaddr *ifa = (struct ifaddr *)data; 3155 #endif 3156 bool avoid_reset = FALSE; 3157 int err = 0, reinit = 0, bits; 3158 3159 switch (command) { 3160 case SIOCSIFADDR: 3161 #ifdef INET 3162 if (ifa->ifa_addr->sa_family == AF_INET) 3163 avoid_reset = TRUE; 3164 #endif 3165 #ifdef INET6 3166 if (ifa->ifa_addr->sa_family == AF_INET6) 3167 avoid_reset = TRUE; 3168 #endif 3169 /* 3170 ** Calling init results in link renegotiation, 3171 ** so we avoid doing it when possible. 3172 */ 3173 if (avoid_reset) { 3174 if_setflagbits(ifp, IFF_UP,0); 3175 if (!(if_getdrvflags(ifp)& IFF_DRV_RUNNING)) 3176 reinit = 1; 3177 #ifdef INET 3178 if (!(if_getflags(ifp) & IFF_NOARP)) 3179 arp_ifinit(ifp, ifa); 3180 #endif 3181 } else 3182 err = ether_ioctl(ifp, command, data); 3183 break; 3184 case SIOCSIFMTU: 3185 CTX_LOCK(ctx); 3186 if (ifr->ifr_mtu == if_getmtu(ifp)) { 3187 CTX_UNLOCK(ctx); 3188 break; 3189 } 3190 bits = if_getdrvflags(ifp); 3191 /* stop the driver and free any clusters before proceeding */ 3192 iflib_stop(ctx); 3193 3194 if ((err = IFDI_MTU_SET(ctx, ifr->ifr_mtu)) == 0) { 3195 if (ifr->ifr_mtu > ctx->ifc_max_fl_buf_size) 3196 ctx->ifc_flags |= IFC_MULTISEG; 3197 else 3198 ctx->ifc_flags &= ~IFC_MULTISEG; 3199 err = if_setmtu(ifp, ifr->ifr_mtu); 3200 } 3201 iflib_init_locked(ctx); 3202 if_setdrvflags(ifp, bits); 3203 CTX_UNLOCK(ctx); 3204 break; 3205 case SIOCSIFFLAGS: 3206 CTX_LOCK(ctx); 3207 if (if_getflags(ifp) & IFF_UP) { 3208 if (if_getdrvflags(ifp) & IFF_DRV_RUNNING) { 3209 if ((if_getflags(ifp) ^ ctx->ifc_if_flags) & 3210 (IFF_PROMISC | IFF_ALLMULTI)) { 3211 err = IFDI_PROMISC_SET(ctx, if_getflags(ifp)); 3212 } 3213 } else 3214 reinit = 1; 3215 } else if (if_getdrvflags(ifp) & IFF_DRV_RUNNING) { 3216 iflib_stop(ctx); 3217 } 3218 ctx->ifc_if_flags = if_getflags(ifp); 3219 CTX_UNLOCK(ctx); 3220 break; 3221 3222 break; 3223 case SIOCADDMULTI: 3224 case SIOCDELMULTI: 3225 if (if_getdrvflags(ifp) & IFF_DRV_RUNNING) { 3226 CTX_LOCK(ctx); 3227 IFDI_INTR_DISABLE(ctx); 3228 IFDI_MULTI_SET(ctx); 3229 IFDI_INTR_ENABLE(ctx); 3230 CTX_UNLOCK(ctx); 3231 } 3232 break; 3233 case SIOCSIFMEDIA: 3234 CTX_LOCK(ctx); 3235 IFDI_MEDIA_SET(ctx); 3236 CTX_UNLOCK(ctx); 3237 /* falls thru */ 3238 case SIOCGIFMEDIA: 3239 err = ifmedia_ioctl(ifp, ifr, &ctx->ifc_media, command); 3240 break; 3241 case SIOCGI2C: 3242 { 3243 struct ifi2creq i2c; 3244 3245 err = copyin(ifr->ifr_data, &i2c, sizeof(i2c)); 3246 if (err != 0) 3247 break; 3248 if (i2c.dev_addr != 0xA0 && i2c.dev_addr != 0xA2) { 3249 err = EINVAL; 3250 break; 3251 } 3252 if (i2c.len > sizeof(i2c.data)) { 3253 err = EINVAL; 3254 break; 3255 } 3256 3257 if ((err = IFDI_I2C_REQ(ctx, &i2c)) == 0) 3258 err = copyout(&i2c, ifr->ifr_data, sizeof(i2c)); 3259 break; 3260 } 3261 case SIOCSIFCAP: 3262 { 3263 int mask, setmask; 3264 3265 mask = ifr->ifr_reqcap ^ if_getcapenable(ifp); 3266 setmask = 0; 3267 #ifdef TCP_OFFLOAD 3268 setmask |= mask & (IFCAP_TOE4|IFCAP_TOE6); 3269 #endif 3270 setmask |= (mask & IFCAP_FLAGS); 3271 3272 if ((mask & IFCAP_WOL) && 3273 (if_getcapabilities(ifp) & IFCAP_WOL) != 0) 3274 setmask |= (mask & (IFCAP_WOL_MCAST|IFCAP_WOL_MAGIC)); 3275 if_vlancap(ifp); 3276 /* 3277 * want to ensure that traffic has stopped before we change any of the flags 3278 */ 3279 if (setmask) { 3280 CTX_LOCK(ctx); 3281 bits = if_getdrvflags(ifp); 3282 if (setmask & IFCAP_REINIT) 3283 iflib_stop(ctx); 3284 if_togglecapenable(ifp, setmask); 3285 if (setmask & IFCAP_REINIT) 3286 iflib_init_locked(ctx); 3287 if_setdrvflags(ifp, bits); 3288 CTX_UNLOCK(ctx); 3289 } 3290 break; 3291 } 3292 case SIOCGPRIVATE_0: 3293 case SIOCSDRVSPEC: 3294 case SIOCGDRVSPEC: 3295 CTX_LOCK(ctx); 3296 err = IFDI_PRIV_IOCTL(ctx, command, data); 3297 CTX_UNLOCK(ctx); 3298 break; 3299 default: 3300 err = ether_ioctl(ifp, command, data); 3301 break; 3302 } 3303 if (reinit) 3304 iflib_if_init(ctx); 3305 return (err); 3306 } 3307 3308 static uint64_t 3309 iflib_if_get_counter(if_t ifp, ift_counter cnt) 3310 { 3311 if_ctx_t ctx = if_getsoftc(ifp); 3312 3313 return (IFDI_GET_COUNTER(ctx, cnt)); 3314 } 3315 3316 /********************************************************************* 3317 * 3318 * OTHER FUNCTIONS EXPORTED TO THE STACK 3319 * 3320 **********************************************************************/ 3321 3322 static void 3323 iflib_vlan_register(void *arg, if_t ifp, uint16_t vtag) 3324 { 3325 if_ctx_t ctx = if_getsoftc(ifp); 3326 3327 if ((void *)ctx != arg) 3328 return; 3329 3330 if ((vtag == 0) || (vtag > 4095)) 3331 return; 3332 3333 CTX_LOCK(ctx); 3334 IFDI_VLAN_REGISTER(ctx, vtag); 3335 /* Re-init to load the changes */ 3336 if (if_getcapenable(ifp) & IFCAP_VLAN_HWFILTER) 3337 iflib_init_locked(ctx); 3338 CTX_UNLOCK(ctx); 3339 } 3340 3341 static void 3342 iflib_vlan_unregister(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_UNREGISTER(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 3360 static void 3361 iflib_led_func(void *arg, int onoff) 3362 { 3363 if_ctx_t ctx = arg; 3364 3365 CTX_LOCK(ctx); 3366 IFDI_LED_FUNC(ctx, onoff); 3367 CTX_UNLOCK(ctx); 3368 } 3369 3370 /********************************************************************* 3371 * 3372 * BUS FUNCTION DEFINITIONS 3373 * 3374 **********************************************************************/ 3375 3376 int 3377 iflib_device_probe(device_t dev) 3378 { 3379 pci_vendor_info_t *ent; 3380 3381 uint16_t pci_vendor_id, pci_device_id; 3382 uint16_t pci_subvendor_id, pci_subdevice_id; 3383 uint16_t pci_rev_id; 3384 if_shared_ctx_t sctx; 3385 3386 if ((sctx = DEVICE_REGISTER(dev)) == NULL || sctx->isc_magic != IFLIB_MAGIC) 3387 return (ENOTSUP); 3388 3389 pci_vendor_id = pci_get_vendor(dev); 3390 pci_device_id = pci_get_device(dev); 3391 pci_subvendor_id = pci_get_subvendor(dev); 3392 pci_subdevice_id = pci_get_subdevice(dev); 3393 pci_rev_id = pci_get_revid(dev); 3394 if (sctx->isc_parse_devinfo != NULL) 3395 sctx->isc_parse_devinfo(&pci_device_id, &pci_subvendor_id, &pci_subdevice_id, &pci_rev_id); 3396 3397 ent = sctx->isc_vendor_info; 3398 while (ent->pvi_vendor_id != 0) { 3399 if (pci_vendor_id != ent->pvi_vendor_id) { 3400 ent++; 3401 continue; 3402 } 3403 if ((pci_device_id == ent->pvi_device_id) && 3404 ((pci_subvendor_id == ent->pvi_subvendor_id) || 3405 (ent->pvi_subvendor_id == 0)) && 3406 ((pci_subdevice_id == ent->pvi_subdevice_id) || 3407 (ent->pvi_subdevice_id == 0)) && 3408 ((pci_rev_id == ent->pvi_rev_id) || 3409 (ent->pvi_rev_id == 0))) { 3410 3411 device_set_desc_copy(dev, ent->pvi_name); 3412 /* this needs to be changed to zero if the bus probing code 3413 * ever stops re-probing on best match because the sctx 3414 * may have its values over written by register calls 3415 * in subsequent probes 3416 */ 3417 return (BUS_PROBE_DEFAULT); 3418 } 3419 ent++; 3420 } 3421 return (ENXIO); 3422 } 3423 3424 int 3425 iflib_device_register(device_t dev, void *sc, if_shared_ctx_t sctx, if_ctx_t *ctxp) 3426 { 3427 int err, rid, msix, msix_bar; 3428 if_ctx_t ctx; 3429 if_t ifp; 3430 if_softc_ctx_t scctx; 3431 3432 3433 ctx = malloc(sizeof(* ctx), M_IFLIB, M_WAITOK|M_ZERO); 3434 3435 if (sc == NULL) { 3436 sc = malloc(sctx->isc_driver->size, M_IFLIB, M_WAITOK|M_ZERO); 3437 device_set_softc(dev, ctx); 3438 } 3439 3440 ctx->ifc_sctx = sctx; 3441 ctx->ifc_dev = dev; 3442 ctx->ifc_txrx = *sctx->isc_txrx; 3443 ctx->ifc_softc = sc; 3444 3445 if ((err = iflib_register(ctx)) != 0) { 3446 device_printf(dev, "iflib_register failed %d\n", err); 3447 return (err); 3448 } 3449 iflib_add_device_sysctl_pre(ctx); 3450 if ((err = IFDI_ATTACH_PRE(ctx)) != 0) { 3451 device_printf(dev, "IFDI_ATTACH_PRE failed %d\n", err); 3452 return (err); 3453 } 3454 #ifdef ACPI_DMAR 3455 if (dmar_get_dma_tag(device_get_parent(dev), dev) != NULL) 3456 ctx->ifc_flags |= IFC_DMAR; 3457 #endif 3458 3459 scctx = &ctx->ifc_softc_ctx; 3460 msix_bar = scctx->isc_msix_bar; 3461 3462 if (scctx->isc_tx_nsegments > sctx->isc_ntxd / MAX_SINGLE_PACKET_FRACTION) 3463 scctx->isc_tx_nsegments = max(1, sctx->isc_ntxd / MAX_SINGLE_PACKET_FRACTION); 3464 if (scctx->isc_tx_tso_segments_max > sctx->isc_ntxd / MAX_SINGLE_PACKET_FRACTION) 3465 scctx->isc_tx_tso_segments_max = max(1, sctx->isc_ntxd / MAX_SINGLE_PACKET_FRACTION); 3466 3467 ifp = ctx->ifc_ifp; 3468 3469 /* 3470 * XXX sanity check that ntxd & nrxd are a power of 2 3471 */ 3472 3473 /* 3474 * Protect the stack against modern hardware 3475 */ 3476 if (scctx->isc_tx_tso_size_max > FREEBSD_TSO_SIZE_MAX) 3477 scctx->isc_tx_tso_size_max = FREEBSD_TSO_SIZE_MAX; 3478 3479 /* TSO parameters - dig these out of the data sheet - simply correspond to tag setup */ 3480 ifp->if_hw_tsomaxsegcount = scctx->isc_tx_tso_segments_max; 3481 ifp->if_hw_tsomax = scctx->isc_tx_tso_size_max; 3482 ifp->if_hw_tsomaxsegsize = scctx->isc_tx_tso_segsize_max; 3483 if (scctx->isc_rss_table_size == 0) 3484 scctx->isc_rss_table_size = 64; 3485 scctx->isc_rss_table_mask = scctx->isc_rss_table_size-1;; 3486 /* 3487 ** Now setup MSI or MSI/X, should 3488 ** return us the number of supported 3489 ** vectors. (Will be 1 for MSI) 3490 */ 3491 if (sctx->isc_flags & IFLIB_SKIP_MSIX) { 3492 msix = scctx->isc_vectors; 3493 } else if (scctx->isc_msix_bar != 0) 3494 msix = iflib_msix_init(ctx); 3495 else { 3496 scctx->isc_vectors = 1; 3497 scctx->isc_ntxqsets = 1; 3498 scctx->isc_nrxqsets = 1; 3499 scctx->isc_intr = IFLIB_INTR_LEGACY; 3500 msix = 0; 3501 } 3502 /* Get memory for the station queues */ 3503 if ((err = iflib_queues_alloc(ctx))) { 3504 device_printf(dev, "Unable to allocate queue memory\n"); 3505 goto fail; 3506 } 3507 3508 if ((err = iflib_qset_structures_setup(ctx))) { 3509 device_printf(dev, "qset structure setup failed %d\n", err); 3510 goto fail_queues; 3511 } 3512 3513 if (msix > 1 && (err = IFDI_MSIX_INTR_ASSIGN(ctx, msix)) != 0) { 3514 device_printf(dev, "IFDI_MSIX_INTR_ASSIGN failed %d\n", err); 3515 goto fail_intr_free; 3516 } 3517 if (msix <= 1) { 3518 rid = 0; 3519 if (scctx->isc_intr == IFLIB_INTR_MSI) { 3520 MPASS(msix == 1); 3521 rid = 1; 3522 } 3523 if ((err = iflib_legacy_setup(ctx, ctx->isc_legacy_intr, ctx, &rid, "irq0")) != 0) { 3524 device_printf(dev, "iflib_legacy_setup failed %d\n", err); 3525 goto fail_intr_free; 3526 } 3527 } 3528 ether_ifattach(ctx->ifc_ifp, ctx->ifc_mac); 3529 if ((err = IFDI_ATTACH_POST(ctx)) != 0) { 3530 device_printf(dev, "IFDI_ATTACH_POST failed %d\n", err); 3531 goto fail_detach; 3532 } 3533 if ((err = iflib_netmap_attach(ctx))) { 3534 device_printf(ctx->ifc_dev, "netmap attach failed: %d\n", err); 3535 goto fail_detach; 3536 } 3537 *ctxp = ctx; 3538 3539 iflib_add_device_sysctl_post(ctx); 3540 return (0); 3541 fail_detach: 3542 ether_ifdetach(ctx->ifc_ifp); 3543 fail_intr_free: 3544 if (scctx->isc_intr == IFLIB_INTR_MSIX || scctx->isc_intr == IFLIB_INTR_MSI) 3545 pci_release_msi(ctx->ifc_dev); 3546 fail_queues: 3547 /* XXX free queues */ 3548 fail: 3549 IFDI_DETACH(ctx); 3550 return (err); 3551 } 3552 3553 int 3554 iflib_device_attach(device_t dev) 3555 { 3556 if_ctx_t ctx; 3557 if_shared_ctx_t sctx; 3558 3559 if ((sctx = DEVICE_REGISTER(dev)) == NULL || sctx->isc_magic != IFLIB_MAGIC) 3560 return (ENOTSUP); 3561 3562 pci_enable_busmaster(dev); 3563 3564 return (iflib_device_register(dev, NULL, sctx, &ctx)); 3565 } 3566 3567 int 3568 iflib_device_deregister(if_ctx_t ctx) 3569 { 3570 if_t ifp = ctx->ifc_ifp; 3571 iflib_txq_t txq; 3572 iflib_rxq_t rxq; 3573 device_t dev = ctx->ifc_dev; 3574 int i; 3575 struct taskqgroup *tqg; 3576 3577 /* Make sure VLANS are not using driver */ 3578 if (if_vlantrunkinuse(ifp)) { 3579 device_printf(dev,"Vlan in use, detach first\n"); 3580 return (EBUSY); 3581 } 3582 3583 CTX_LOCK(ctx); 3584 ctx->ifc_in_detach = 1; 3585 iflib_stop(ctx); 3586 CTX_UNLOCK(ctx); 3587 3588 /* Unregister VLAN events */ 3589 if (ctx->ifc_vlan_attach_event != NULL) 3590 EVENTHANDLER_DEREGISTER(vlan_config, ctx->ifc_vlan_attach_event); 3591 if (ctx->ifc_vlan_detach_event != NULL) 3592 EVENTHANDLER_DEREGISTER(vlan_unconfig, ctx->ifc_vlan_detach_event); 3593 3594 iflib_netmap_detach(ifp); 3595 ether_ifdetach(ifp); 3596 /* ether_ifdetach calls if_qflush - lock must be destroy afterwards*/ 3597 CTX_LOCK_DESTROY(ctx); 3598 if (ctx->ifc_led_dev != NULL) 3599 led_destroy(ctx->ifc_led_dev); 3600 /* XXX drain any dependent tasks */ 3601 tqg = qgroup_if_io_tqg; 3602 for (txq = ctx->ifc_txqs, i = 0, rxq = ctx->ifc_rxqs; i < NTXQSETS(ctx); i++, txq++) { 3603 callout_drain(&txq->ift_timer); 3604 callout_drain(&txq->ift_db_check); 3605 if (txq->ift_task.gt_uniq != NULL) 3606 taskqgroup_detach(tqg, &txq->ift_task); 3607 } 3608 for (i = 0, rxq = ctx->ifc_rxqs; i < NRXQSETS(ctx); i++, rxq++) { 3609 if (rxq->ifr_task.gt_uniq != NULL) 3610 taskqgroup_detach(tqg, &rxq->ifr_task); 3611 } 3612 tqg = qgroup_if_config_tqg; 3613 if (ctx->ifc_admin_task.gt_uniq != NULL) 3614 taskqgroup_detach(tqg, &ctx->ifc_admin_task); 3615 if (ctx->ifc_vflr_task.gt_uniq != NULL) 3616 taskqgroup_detach(tqg, &ctx->ifc_vflr_task); 3617 3618 IFDI_DETACH(ctx); 3619 if (ctx->ifc_softc_ctx.isc_intr != IFLIB_INTR_LEGACY) { 3620 pci_release_msi(dev); 3621 } 3622 if (ctx->ifc_softc_ctx.isc_intr != IFLIB_INTR_MSIX) { 3623 iflib_irq_free(ctx, &ctx->ifc_legacy_irq); 3624 } 3625 if (ctx->ifc_msix_mem != NULL) { 3626 bus_release_resource(ctx->ifc_dev, SYS_RES_MEMORY, 3627 ctx->ifc_softc_ctx.isc_msix_bar, ctx->ifc_msix_mem); 3628 ctx->ifc_msix_mem = NULL; 3629 } 3630 3631 bus_generic_detach(dev); 3632 if_free(ifp); 3633 3634 iflib_tx_structures_free(ctx); 3635 iflib_rx_structures_free(ctx); 3636 return (0); 3637 } 3638 3639 3640 int 3641 iflib_device_detach(device_t dev) 3642 { 3643 if_ctx_t ctx = device_get_softc(dev); 3644 3645 return (iflib_device_deregister(ctx)); 3646 } 3647 3648 int 3649 iflib_device_suspend(device_t dev) 3650 { 3651 if_ctx_t ctx = device_get_softc(dev); 3652 3653 CTX_LOCK(ctx); 3654 IFDI_SUSPEND(ctx); 3655 CTX_UNLOCK(ctx); 3656 3657 return bus_generic_suspend(dev); 3658 } 3659 int 3660 iflib_device_shutdown(device_t dev) 3661 { 3662 if_ctx_t ctx = device_get_softc(dev); 3663 3664 CTX_LOCK(ctx); 3665 IFDI_SHUTDOWN(ctx); 3666 CTX_UNLOCK(ctx); 3667 3668 return bus_generic_suspend(dev); 3669 } 3670 3671 3672 int 3673 iflib_device_resume(device_t dev) 3674 { 3675 if_ctx_t ctx = device_get_softc(dev); 3676 iflib_txq_t txq = ctx->ifc_txqs; 3677 3678 CTX_LOCK(ctx); 3679 IFDI_RESUME(ctx); 3680 iflib_init_locked(ctx); 3681 CTX_UNLOCK(ctx); 3682 for (int i = 0; i < NTXQSETS(ctx); i++, txq++) 3683 iflib_txq_check_drain(txq, IFLIB_RESTART_BUDGET); 3684 3685 return (bus_generic_resume(dev)); 3686 } 3687 3688 int 3689 iflib_device_iov_init(device_t dev, uint16_t num_vfs, const nvlist_t *params) 3690 { 3691 int error; 3692 if_ctx_t ctx = device_get_softc(dev); 3693 3694 CTX_LOCK(ctx); 3695 error = IFDI_IOV_INIT(ctx, num_vfs, params); 3696 CTX_UNLOCK(ctx); 3697 3698 return (error); 3699 } 3700 3701 void 3702 iflib_device_iov_uninit(device_t dev) 3703 { 3704 if_ctx_t ctx = device_get_softc(dev); 3705 3706 CTX_LOCK(ctx); 3707 IFDI_IOV_UNINIT(ctx); 3708 CTX_UNLOCK(ctx); 3709 } 3710 3711 int 3712 iflib_device_iov_add_vf(device_t dev, uint16_t vfnum, const nvlist_t *params) 3713 { 3714 int error; 3715 if_ctx_t ctx = device_get_softc(dev); 3716 3717 CTX_LOCK(ctx); 3718 error = IFDI_IOV_VF_ADD(ctx, vfnum, params); 3719 CTX_UNLOCK(ctx); 3720 3721 return (error); 3722 } 3723 3724 /********************************************************************* 3725 * 3726 * MODULE FUNCTION DEFINITIONS 3727 * 3728 **********************************************************************/ 3729 3730 /* 3731 * - Start a fast taskqueue thread for each core 3732 * - Start a taskqueue for control operations 3733 */ 3734 static int 3735 iflib_module_init(void) 3736 { 3737 return (0); 3738 } 3739 3740 static int 3741 iflib_module_event_handler(module_t mod, int what, void *arg) 3742 { 3743 int err; 3744 3745 switch (what) { 3746 case MOD_LOAD: 3747 if ((err = iflib_module_init()) != 0) 3748 return (err); 3749 break; 3750 case MOD_UNLOAD: 3751 return (EBUSY); 3752 default: 3753 return (EOPNOTSUPP); 3754 } 3755 3756 return (0); 3757 } 3758 3759 /********************************************************************* 3760 * 3761 * PUBLIC FUNCTION DEFINITIONS 3762 * ordered as in iflib.h 3763 * 3764 **********************************************************************/ 3765 3766 3767 static void 3768 _iflib_assert(if_shared_ctx_t sctx) 3769 { 3770 MPASS(sctx->isc_tx_maxsize); 3771 MPASS(sctx->isc_tx_maxsegsize); 3772 3773 MPASS(sctx->isc_rx_maxsize); 3774 MPASS(sctx->isc_rx_nsegments); 3775 MPASS(sctx->isc_rx_maxsegsize); 3776 3777 3778 MPASS(sctx->isc_txrx->ift_txd_encap); 3779 MPASS(sctx->isc_txrx->ift_txd_flush); 3780 MPASS(sctx->isc_txrx->ift_txd_credits_update); 3781 MPASS(sctx->isc_txrx->ift_rxd_available); 3782 MPASS(sctx->isc_txrx->ift_rxd_pkt_get); 3783 MPASS(sctx->isc_txrx->ift_rxd_refill); 3784 MPASS(sctx->isc_txrx->ift_rxd_flush); 3785 MPASS(sctx->isc_nrxd); 3786 } 3787 3788 static int 3789 iflib_register(if_ctx_t ctx) 3790 { 3791 if_shared_ctx_t sctx = ctx->ifc_sctx; 3792 driver_t *driver = sctx->isc_driver; 3793 device_t dev = ctx->ifc_dev; 3794 if_t ifp; 3795 3796 _iflib_assert(sctx); 3797 3798 CTX_LOCK_INIT(ctx, device_get_nameunit(ctx->ifc_dev)); 3799 MPASS(ctx->ifc_flags == 0); 3800 3801 ifp = ctx->ifc_ifp = if_gethandle(IFT_ETHER); 3802 if (ifp == NULL) { 3803 device_printf(dev, "can not allocate ifnet structure\n"); 3804 return (ENOMEM); 3805 } 3806 3807 /* 3808 * Initialize our context's device specific methods 3809 */ 3810 kobj_init((kobj_t) ctx, (kobj_class_t) driver); 3811 kobj_class_compile((kobj_class_t) driver); 3812 driver->refs++; 3813 3814 if_initname(ifp, device_get_name(dev), device_get_unit(dev)); 3815 if_setsoftc(ifp, ctx); 3816 if_setdev(ifp, dev); 3817 if_setinitfn(ifp, iflib_if_init); 3818 if_setioctlfn(ifp, iflib_if_ioctl); 3819 if_settransmitfn(ifp, iflib_if_transmit); 3820 if_setqflushfn(ifp, iflib_if_qflush); 3821 if_setgetcounterfn(ifp, iflib_if_get_counter); 3822 if_setflags(ifp, IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST); 3823 3824 if_setcapabilities(ifp, 0); 3825 if_setcapenable(ifp, 0); 3826 3827 ctx->ifc_vlan_attach_event = 3828 EVENTHANDLER_REGISTER(vlan_config, iflib_vlan_register, ctx, 3829 EVENTHANDLER_PRI_FIRST); 3830 ctx->ifc_vlan_detach_event = 3831 EVENTHANDLER_REGISTER(vlan_unconfig, iflib_vlan_unregister, ctx, 3832 EVENTHANDLER_PRI_FIRST); 3833 3834 ifmedia_init(&ctx->ifc_media, IFM_IMASK, 3835 iflib_media_change, iflib_media_status); 3836 3837 return (0); 3838 } 3839 3840 3841 static int 3842 iflib_queues_alloc(if_ctx_t ctx) 3843 { 3844 if_shared_ctx_t sctx = ctx->ifc_sctx; 3845 device_t dev = ctx->ifc_dev; 3846 int nrxqsets = ctx->ifc_softc_ctx.isc_nrxqsets; 3847 int ntxqsets = ctx->ifc_softc_ctx.isc_ntxqsets; 3848 iflib_txq_t txq; 3849 iflib_rxq_t rxq; 3850 iflib_fl_t fl = NULL; 3851 int i, j, err, txconf, rxconf, fl_ifdi_offset; 3852 iflib_dma_info_t ifdip; 3853 uint32_t *rxqsizes = sctx->isc_rxqsizes; 3854 uint32_t *txqsizes = sctx->isc_txqsizes; 3855 uint8_t nrxqs = sctx->isc_nrxqs; 3856 uint8_t ntxqs = sctx->isc_ntxqs; 3857 int nfree_lists = sctx->isc_nfl ? sctx->isc_nfl : 1; 3858 caddr_t *vaddrs; 3859 uint64_t *paddrs; 3860 struct ifmp_ring **brscp; 3861 int nbuf_rings = 1; /* XXX determine dynamically */ 3862 3863 KASSERT(ntxqs > 0, ("number of queues must be at least 1")); 3864 KASSERT(nrxqs > 0, ("number of queues must be at least 1")); 3865 3866 brscp = NULL; 3867 rxq = NULL; 3868 3869 /* Allocate the TX ring struct memory */ 3870 if (!(txq = 3871 (iflib_txq_t) malloc(sizeof(struct iflib_txq) * 3872 ntxqsets, M_IFLIB, M_NOWAIT | M_ZERO))) { 3873 device_printf(dev, "Unable to allocate TX ring memory\n"); 3874 err = ENOMEM; 3875 goto fail; 3876 } 3877 3878 /* Now allocate the RX */ 3879 if (!(rxq = 3880 (iflib_rxq_t) malloc(sizeof(struct iflib_rxq) * 3881 nrxqsets, M_IFLIB, M_NOWAIT | M_ZERO))) { 3882 device_printf(dev, "Unable to allocate RX ring memory\n"); 3883 err = ENOMEM; 3884 goto rx_fail; 3885 } 3886 if (!(brscp = malloc(sizeof(void *) * nbuf_rings * nrxqsets, M_IFLIB, M_NOWAIT | M_ZERO))) { 3887 device_printf(dev, "Unable to buf_ring_sc * memory\n"); 3888 err = ENOMEM; 3889 goto rx_fail; 3890 } 3891 3892 ctx->ifc_txqs = txq; 3893 ctx->ifc_rxqs = rxq; 3894 txq = NULL; 3895 rxq = NULL; 3896 3897 /* 3898 * XXX handle allocation failure 3899 */ 3900 for (txconf = i = 0; i < ntxqsets; i++, txconf++, txq++) { 3901 /* Set up some basics */ 3902 3903 if ((ifdip = malloc(sizeof(struct iflib_dma_info) * ntxqs, M_IFLIB, M_WAITOK|M_ZERO)) == NULL) { 3904 device_printf(dev, "failed to allocate iflib_dma_info\n"); 3905 err = ENOMEM; 3906 goto err_tx_desc; 3907 } 3908 txq->ift_ifdi = ifdip; 3909 for (j = 0; j < ntxqs; j++, ifdip++) { 3910 if (iflib_dma_alloc(ctx, txqsizes[j], ifdip, BUS_DMA_NOWAIT)) { 3911 device_printf(dev, "Unable to allocate Descriptor memory\n"); 3912 err = ENOMEM; 3913 goto err_tx_desc; 3914 } 3915 bzero((void *)ifdip->idi_vaddr, txqsizes[j]); 3916 } 3917 txq->ift_ctx = ctx; 3918 txq->ift_id = i; 3919 /* XXX fix this */ 3920 txq->ift_timer.c_cpu = i % mp_ncpus; 3921 txq->ift_db_check.c_cpu = i % mp_ncpus; 3922 txq->ift_nbr = nbuf_rings; 3923 3924 if (iflib_txsd_alloc(txq)) { 3925 device_printf(dev, "Critical Failure setting up TX buffers\n"); 3926 err = ENOMEM; 3927 goto err_tx_desc; 3928 } 3929 3930 /* Initialize the TX lock */ 3931 snprintf(txq->ift_mtx_name, MTX_NAME_LEN, "%s:tx(%d):callout", 3932 device_get_nameunit(dev), txq->ift_id); 3933 mtx_init(&txq->ift_mtx, txq->ift_mtx_name, NULL, MTX_DEF); 3934 callout_init_mtx(&txq->ift_timer, &txq->ift_mtx, 0); 3935 callout_init_mtx(&txq->ift_db_check, &txq->ift_mtx, 0); 3936 3937 snprintf(txq->ift_db_mtx_name, MTX_NAME_LEN, "%s:tx(%d):db", 3938 device_get_nameunit(dev), txq->ift_id); 3939 TXDB_LOCK_INIT(txq); 3940 3941 txq->ift_br = brscp + i*nbuf_rings; 3942 for (j = 0; j < nbuf_rings; j++) { 3943 err = ifmp_ring_alloc(&txq->ift_br[j], 2048, txq, iflib_txq_drain, 3944 iflib_txq_can_drain, M_IFLIB, M_WAITOK); 3945 if (err) { 3946 /* XXX free any allocated rings */ 3947 device_printf(dev, "Unable to allocate buf_ring\n"); 3948 goto err_tx_desc; 3949 } 3950 } 3951 } 3952 3953 for (rxconf = i = 0; i < nrxqsets; i++, rxconf++, rxq++) { 3954 /* Set up some basics */ 3955 3956 if ((ifdip = malloc(sizeof(struct iflib_dma_info) * nrxqs, M_IFLIB, M_WAITOK|M_ZERO)) == NULL) { 3957 device_printf(dev, "failed to allocate iflib_dma_info\n"); 3958 err = ENOMEM; 3959 goto err_tx_desc; 3960 } 3961 3962 rxq->ifr_ifdi = ifdip; 3963 for (j = 0; j < nrxqs; j++, ifdip++) { 3964 if (iflib_dma_alloc(ctx, rxqsizes[j], ifdip, BUS_DMA_NOWAIT)) { 3965 device_printf(dev, "Unable to allocate Descriptor memory\n"); 3966 err = ENOMEM; 3967 goto err_tx_desc; 3968 } 3969 bzero((void *)ifdip->idi_vaddr, rxqsizes[j]); 3970 } 3971 rxq->ifr_ctx = ctx; 3972 rxq->ifr_id = i; 3973 if (sctx->isc_flags & IFLIB_HAS_CQ) { 3974 fl_ifdi_offset = 1; 3975 } else { 3976 fl_ifdi_offset = 0; 3977 } 3978 rxq->ifr_nfl = nfree_lists; 3979 if (!(fl = 3980 (iflib_fl_t) malloc(sizeof(struct iflib_fl) * nfree_lists, M_IFLIB, M_NOWAIT | M_ZERO))) { 3981 device_printf(dev, "Unable to allocate free list memory\n"); 3982 err = ENOMEM; 3983 goto err_tx_desc; 3984 } 3985 rxq->ifr_fl = fl; 3986 for (j = 0; j < nfree_lists; j++) { 3987 rxq->ifr_fl[j].ifl_rxq = rxq; 3988 rxq->ifr_fl[j].ifl_id = j; 3989 rxq->ifr_fl[j].ifl_ifdi = &rxq->ifr_ifdi[j + fl_ifdi_offset]; 3990 } 3991 /* Allocate receive buffers for the ring*/ 3992 if (iflib_rxsd_alloc(rxq)) { 3993 device_printf(dev, 3994 "Critical Failure setting up receive buffers\n"); 3995 err = ENOMEM; 3996 goto err_rx_desc; 3997 } 3998 } 3999 4000 /* TXQs */ 4001 vaddrs = malloc(sizeof(caddr_t)*ntxqsets*ntxqs, M_IFLIB, M_WAITOK); 4002 paddrs = malloc(sizeof(uint64_t)*ntxqsets*ntxqs, M_IFLIB, M_WAITOK); 4003 for (i = 0; i < ntxqsets; i++) { 4004 iflib_dma_info_t di = ctx->ifc_txqs[i].ift_ifdi; 4005 4006 for (j = 0; j < ntxqs; j++, di++) { 4007 vaddrs[i*ntxqs + j] = di->idi_vaddr; 4008 paddrs[i*ntxqs + j] = di->idi_paddr; 4009 } 4010 } 4011 if ((err = IFDI_TX_QUEUES_ALLOC(ctx, vaddrs, paddrs, ntxqs, ntxqsets)) != 0) { 4012 device_printf(ctx->ifc_dev, "device queue allocation failed\n"); 4013 iflib_tx_structures_free(ctx); 4014 free(vaddrs, M_IFLIB); 4015 free(paddrs, M_IFLIB); 4016 goto err_rx_desc; 4017 } 4018 free(vaddrs, M_IFLIB); 4019 free(paddrs, M_IFLIB); 4020 4021 /* RXQs */ 4022 vaddrs = malloc(sizeof(caddr_t)*nrxqsets*nrxqs, M_IFLIB, M_WAITOK); 4023 paddrs = malloc(sizeof(uint64_t)*nrxqsets*nrxqs, M_IFLIB, M_WAITOK); 4024 for (i = 0; i < nrxqsets; i++) { 4025 iflib_dma_info_t di = ctx->ifc_rxqs[i].ifr_ifdi; 4026 4027 for (j = 0; j < nrxqs; j++, di++) { 4028 vaddrs[i*nrxqs + j] = di->idi_vaddr; 4029 paddrs[i*nrxqs + j] = di->idi_paddr; 4030 } 4031 } 4032 if ((err = IFDI_RX_QUEUES_ALLOC(ctx, vaddrs, paddrs, nrxqs, nrxqsets)) != 0) { 4033 device_printf(ctx->ifc_dev, "device queue allocation failed\n"); 4034 iflib_tx_structures_free(ctx); 4035 free(vaddrs, M_IFLIB); 4036 free(paddrs, M_IFLIB); 4037 goto err_rx_desc; 4038 } 4039 free(vaddrs, M_IFLIB); 4040 free(paddrs, M_IFLIB); 4041 4042 return (0); 4043 4044 /* XXX handle allocation failure changes */ 4045 err_rx_desc: 4046 err_tx_desc: 4047 if (ctx->ifc_rxqs != NULL) 4048 free(ctx->ifc_rxqs, M_IFLIB); 4049 ctx->ifc_rxqs = NULL; 4050 if (ctx->ifc_txqs != NULL) 4051 free(ctx->ifc_txqs, M_IFLIB); 4052 ctx->ifc_txqs = NULL; 4053 rx_fail: 4054 if (brscp != NULL) 4055 free(brscp, M_IFLIB); 4056 if (rxq != NULL) 4057 free(rxq, M_IFLIB); 4058 if (txq != NULL) 4059 free(txq, M_IFLIB); 4060 fail: 4061 return (err); 4062 } 4063 4064 static int 4065 iflib_tx_structures_setup(if_ctx_t ctx) 4066 { 4067 iflib_txq_t txq = ctx->ifc_txqs; 4068 int i; 4069 4070 for (i = 0; i < NTXQSETS(ctx); i++, txq++) 4071 iflib_txq_setup(txq); 4072 4073 return (0); 4074 } 4075 4076 static void 4077 iflib_tx_structures_free(if_ctx_t ctx) 4078 { 4079 iflib_txq_t txq = ctx->ifc_txqs; 4080 int i, j; 4081 4082 for (i = 0; i < NTXQSETS(ctx); i++, txq++) { 4083 iflib_txq_destroy(txq); 4084 for (j = 0; j < ctx->ifc_nhwtxqs; j++) 4085 iflib_dma_free(&txq->ift_ifdi[j]); 4086 } 4087 free(ctx->ifc_txqs, M_IFLIB); 4088 ctx->ifc_txqs = NULL; 4089 IFDI_QUEUES_FREE(ctx); 4090 } 4091 4092 /********************************************************************* 4093 * 4094 * Initialize all receive rings. 4095 * 4096 **********************************************************************/ 4097 static int 4098 iflib_rx_structures_setup(if_ctx_t ctx) 4099 { 4100 iflib_rxq_t rxq = ctx->ifc_rxqs; 4101 int q; 4102 #if defined(INET6) || defined(INET) 4103 int i, err; 4104 #endif 4105 4106 for (q = 0; q < ctx->ifc_softc_ctx.isc_nrxqsets; q++, rxq++) { 4107 #if defined(INET6) || defined(INET) 4108 tcp_lro_free(&rxq->ifr_lc); 4109 if ((err = tcp_lro_init(&rxq->ifr_lc)) != 0) { 4110 device_printf(ctx->ifc_dev, "LRO Initialization failed!\n"); 4111 goto fail; 4112 } 4113 rxq->ifr_lro_enabled = TRUE; 4114 rxq->ifr_lc.ifp = ctx->ifc_ifp; 4115 #endif 4116 IFDI_RXQ_SETUP(ctx, rxq->ifr_id); 4117 } 4118 return (0); 4119 #if defined(INET6) || defined(INET) 4120 fail: 4121 /* 4122 * Free RX software descriptors allocated so far, we will only handle 4123 * the rings that completed, the failing case will have 4124 * cleaned up for itself. 'q' failed, so its the terminus. 4125 */ 4126 rxq = ctx->ifc_rxqs; 4127 for (i = 0; i < q; ++i, rxq++) { 4128 iflib_rx_sds_free(rxq); 4129 rxq->ifr_cq_gen = rxq->ifr_cq_cidx = rxq->ifr_cq_pidx = 0; 4130 } 4131 return (err); 4132 #endif 4133 } 4134 4135 /********************************************************************* 4136 * 4137 * Free all receive rings. 4138 * 4139 **********************************************************************/ 4140 static void 4141 iflib_rx_structures_free(if_ctx_t ctx) 4142 { 4143 iflib_rxq_t rxq = ctx->ifc_rxqs; 4144 4145 for (int i = 0; i < ctx->ifc_softc_ctx.isc_ntxqsets; i++, rxq++) { 4146 iflib_rx_sds_free(rxq); 4147 } 4148 } 4149 4150 static int 4151 iflib_qset_structures_setup(if_ctx_t ctx) 4152 { 4153 int err; 4154 4155 if ((err = iflib_tx_structures_setup(ctx)) != 0) 4156 return (err); 4157 4158 if ((err = iflib_rx_structures_setup(ctx)) != 0) { 4159 device_printf(ctx->ifc_dev, "iflib_rx_structures_setup failed: %d\n", err); 4160 iflib_tx_structures_free(ctx); 4161 iflib_rx_structures_free(ctx); 4162 } 4163 return (err); 4164 } 4165 4166 int 4167 iflib_irq_alloc(if_ctx_t ctx, if_irq_t irq, int rid, 4168 driver_filter_t filter, void *filter_arg, driver_intr_t handler, void *arg, char *name) 4169 { 4170 4171 return (_iflib_irq_alloc(ctx, irq, rid, filter, handler, arg, name)); 4172 } 4173 4174 static void 4175 find_nth(if_ctx_t ctx, cpuset_t *cpus, int qid) 4176 { 4177 int i, cpuid; 4178 4179 CPU_COPY(&ctx->ifc_cpus, cpus); 4180 /* clear up to the qid'th bit */ 4181 for (i = 0; i < qid; i++) { 4182 cpuid = CPU_FFS(cpus); 4183 CPU_CLR(cpuid, cpus); 4184 } 4185 } 4186 4187 int 4188 iflib_irq_alloc_generic(if_ctx_t ctx, if_irq_t irq, int rid, 4189 iflib_intr_type_t type, driver_filter_t *filter, 4190 void *filter_arg, int qid, char *name) 4191 { 4192 struct grouptask *gtask; 4193 struct taskqgroup *tqg; 4194 iflib_filter_info_t info; 4195 cpuset_t cpus; 4196 task_fn_t *fn; 4197 int tqrid, err; 4198 void *q; 4199 4200 info = &ctx->ifc_filter_info; 4201 4202 switch (type) { 4203 /* XXX merge tx/rx for netmap? */ 4204 case IFLIB_INTR_TX: 4205 q = &ctx->ifc_txqs[qid]; 4206 info = &ctx->ifc_txqs[qid].ift_filter_info; 4207 gtask = &ctx->ifc_txqs[qid].ift_task; 4208 tqg = qgroup_if_io_tqg; 4209 tqrid = irq->ii_rid; 4210 fn = _task_fn_tx; 4211 break; 4212 case IFLIB_INTR_RX: 4213 q = &ctx->ifc_rxqs[qid]; 4214 info = &ctx->ifc_rxqs[qid].ifr_filter_info; 4215 gtask = &ctx->ifc_rxqs[qid].ifr_task; 4216 tqg = qgroup_if_io_tqg; 4217 tqrid = irq->ii_rid; 4218 fn = _task_fn_rx; 4219 break; 4220 case IFLIB_INTR_ADMIN: 4221 q = ctx; 4222 info = &ctx->ifc_filter_info; 4223 gtask = &ctx->ifc_admin_task; 4224 tqg = qgroup_if_config_tqg; 4225 tqrid = -1; 4226 fn = _task_fn_admin; 4227 break; 4228 default: 4229 panic("unknown net intr type"); 4230 } 4231 GROUPTASK_INIT(gtask, 0, fn, q); 4232 4233 info->ifi_filter = filter; 4234 info->ifi_filter_arg = filter_arg; 4235 info->ifi_task = gtask; 4236 4237 /* XXX query cpu that rid belongs to */ 4238 4239 err = _iflib_irq_alloc(ctx, irq, rid, iflib_fast_intr, NULL, info, name); 4240 if (err != 0) 4241 return (err); 4242 if (tqrid != -1) { 4243 find_nth(ctx, &cpus, qid); 4244 taskqgroup_attach_cpu(tqg, gtask, q, CPU_FFS(&cpus), irq->ii_rid, name); 4245 } else 4246 taskqgroup_attach(tqg, gtask, q, tqrid, name); 4247 4248 4249 return (0); 4250 } 4251 4252 void 4253 iflib_softirq_alloc_generic(if_ctx_t ctx, int rid, iflib_intr_type_t type, void *arg, int qid, char *name) 4254 { 4255 struct grouptask *gtask; 4256 struct taskqgroup *tqg; 4257 task_fn_t *fn; 4258 void *q; 4259 4260 switch (type) { 4261 case IFLIB_INTR_TX: 4262 q = &ctx->ifc_txqs[qid]; 4263 gtask = &ctx->ifc_txqs[qid].ift_task; 4264 tqg = qgroup_if_io_tqg; 4265 fn = _task_fn_tx; 4266 break; 4267 case IFLIB_INTR_RX: 4268 q = &ctx->ifc_rxqs[qid]; 4269 gtask = &ctx->ifc_rxqs[qid].ifr_task; 4270 tqg = qgroup_if_io_tqg; 4271 fn = _task_fn_rx; 4272 break; 4273 case IFLIB_INTR_ADMIN: 4274 q = ctx; 4275 gtask = &ctx->ifc_admin_task; 4276 tqg = qgroup_if_config_tqg; 4277 rid = -1; 4278 fn = _task_fn_admin; 4279 break; 4280 case IFLIB_INTR_IOV: 4281 q = ctx; 4282 gtask = &ctx->ifc_vflr_task; 4283 tqg = qgroup_if_config_tqg; 4284 rid = -1; 4285 fn = _task_fn_iov; 4286 break; 4287 default: 4288 panic("unknown net intr type"); 4289 } 4290 GROUPTASK_INIT(gtask, 0, fn, q); 4291 taskqgroup_attach(tqg, gtask, q, rid, name); 4292 } 4293 4294 void 4295 iflib_irq_free(if_ctx_t ctx, if_irq_t irq) 4296 { 4297 if (irq->ii_tag) 4298 bus_teardown_intr(ctx->ifc_dev, irq->ii_res, irq->ii_tag); 4299 4300 if (irq->ii_res) 4301 bus_release_resource(ctx->ifc_dev, SYS_RES_IRQ, irq->ii_rid, irq->ii_res); 4302 } 4303 4304 static int 4305 iflib_legacy_setup(if_ctx_t ctx, driver_filter_t filter, void *filter_arg, int *rid, char *name) 4306 { 4307 iflib_txq_t txq = ctx->ifc_txqs; 4308 iflib_rxq_t rxq = ctx->ifc_rxqs; 4309 if_irq_t irq = &ctx->ifc_legacy_irq; 4310 iflib_filter_info_t info; 4311 struct grouptask *gtask; 4312 struct taskqgroup *tqg; 4313 task_fn_t *fn; 4314 int tqrid; 4315 void *q; 4316 int err; 4317 4318 q = &ctx->ifc_rxqs[0]; 4319 info = &rxq[0].ifr_filter_info; 4320 gtask = &rxq[0].ifr_task; 4321 tqg = qgroup_if_io_tqg; 4322 tqrid = irq->ii_rid = *rid; 4323 fn = _task_fn_rx; 4324 4325 ctx->ifc_flags |= IFC_LEGACY; 4326 info->ifi_filter = filter; 4327 info->ifi_filter_arg = filter_arg; 4328 info->ifi_task = gtask; 4329 4330 /* We allocate a single interrupt resource */ 4331 if ((err = _iflib_irq_alloc(ctx, irq, tqrid, iflib_fast_intr, NULL, info, name)) != 0) 4332 return (err); 4333 GROUPTASK_INIT(gtask, 0, fn, q); 4334 taskqgroup_attach(tqg, gtask, q, tqrid, name); 4335 4336 GROUPTASK_INIT(&txq->ift_task, 0, _task_fn_tx, txq); 4337 taskqgroup_attach(qgroup_if_io_tqg, &txq->ift_task, txq, tqrid, "tx"); 4338 GROUPTASK_INIT(&ctx->ifc_admin_task, 0, _task_fn_admin, ctx); 4339 taskqgroup_attach(qgroup_if_config_tqg, &ctx->ifc_admin_task, ctx, -1, "admin/link"); 4340 4341 return (0); 4342 } 4343 4344 void 4345 iflib_led_create(if_ctx_t ctx) 4346 { 4347 4348 ctx->ifc_led_dev = led_create(iflib_led_func, ctx, 4349 device_get_nameunit(ctx->ifc_dev)); 4350 } 4351 4352 void 4353 iflib_tx_intr_deferred(if_ctx_t ctx, int txqid) 4354 { 4355 4356 GROUPTASK_ENQUEUE(&ctx->ifc_txqs[txqid].ift_task); 4357 } 4358 4359 void 4360 iflib_rx_intr_deferred(if_ctx_t ctx, int rxqid) 4361 { 4362 4363 GROUPTASK_ENQUEUE(&ctx->ifc_rxqs[rxqid].ifr_task); 4364 } 4365 4366 void 4367 iflib_admin_intr_deferred(if_ctx_t ctx) 4368 { 4369 4370 GROUPTASK_ENQUEUE(&ctx->ifc_admin_task); 4371 } 4372 4373 void 4374 iflib_iov_intr_deferred(if_ctx_t ctx) 4375 { 4376 4377 GROUPTASK_ENQUEUE(&ctx->ifc_vflr_task); 4378 } 4379 4380 void 4381 iflib_io_tqg_attach(struct grouptask *gt, void *uniq, int cpu, char *name) 4382 { 4383 4384 taskqgroup_attach_cpu(qgroup_if_io_tqg, gt, uniq, cpu, -1, name); 4385 } 4386 4387 void 4388 iflib_config_gtask_init(if_ctx_t ctx, struct grouptask *gtask, task_fn_t *fn, 4389 char *name) 4390 { 4391 4392 GROUPTASK_INIT(gtask, 0, fn, ctx); 4393 taskqgroup_attach(qgroup_if_config_tqg, gtask, gtask, -1, name); 4394 } 4395 4396 void 4397 iflib_link_state_change(if_ctx_t ctx, int link_state) 4398 { 4399 if_t ifp = ctx->ifc_ifp; 4400 iflib_txq_t txq = ctx->ifc_txqs; 4401 4402 #if 0 4403 if_setbaudrate(ifp, baudrate); 4404 #endif 4405 /* If link down, disable watchdog */ 4406 if ((ctx->ifc_link_state == LINK_STATE_UP) && (link_state == LINK_STATE_DOWN)) { 4407 for (int i = 0; i < ctx->ifc_softc_ctx.isc_ntxqsets; i++, txq++) 4408 txq->ift_qstatus = IFLIB_QUEUE_IDLE; 4409 } 4410 ctx->ifc_link_state = link_state; 4411 if_link_state_change(ifp, link_state); 4412 } 4413 4414 static int 4415 iflib_tx_credits_update(if_ctx_t ctx, iflib_txq_t txq) 4416 { 4417 int credits; 4418 4419 if (ctx->isc_txd_credits_update == NULL) 4420 return (0); 4421 4422 if ((credits = ctx->isc_txd_credits_update(ctx->ifc_softc, txq->ift_id, txq->ift_cidx_processed, true)) == 0) 4423 return (0); 4424 4425 txq->ift_processed += credits; 4426 txq->ift_cidx_processed += credits; 4427 4428 if (txq->ift_cidx_processed >= txq->ift_size) 4429 txq->ift_cidx_processed -= txq->ift_size; 4430 return (credits); 4431 } 4432 4433 static int 4434 iflib_rxd_avail(if_ctx_t ctx, iflib_rxq_t rxq, int cidx) 4435 { 4436 4437 return (ctx->isc_rxd_available(ctx->ifc_softc, rxq->ifr_id, cidx)); 4438 } 4439 4440 void 4441 iflib_add_int_delay_sysctl(if_ctx_t ctx, const char *name, 4442 const char *description, if_int_delay_info_t info, 4443 int offset, int value) 4444 { 4445 info->iidi_ctx = ctx; 4446 info->iidi_offset = offset; 4447 info->iidi_value = value; 4448 SYSCTL_ADD_PROC(device_get_sysctl_ctx(ctx->ifc_dev), 4449 SYSCTL_CHILDREN(device_get_sysctl_tree(ctx->ifc_dev)), 4450 OID_AUTO, name, CTLTYPE_INT|CTLFLAG_RW, 4451 info, 0, iflib_sysctl_int_delay, "I", description); 4452 } 4453 4454 struct mtx * 4455 iflib_ctx_lock_get(if_ctx_t ctx) 4456 { 4457 4458 return (&ctx->ifc_mtx); 4459 } 4460 4461 static int 4462 iflib_msix_init(if_ctx_t ctx) 4463 { 4464 device_t dev = ctx->ifc_dev; 4465 if_shared_ctx_t sctx = ctx->ifc_sctx; 4466 if_softc_ctx_t scctx = &ctx->ifc_softc_ctx; 4467 int vectors, queues, rx_queues, tx_queues, queuemsgs, msgs; 4468 int iflib_num_tx_queues, iflib_num_rx_queues; 4469 int err, admincnt, bar; 4470 4471 iflib_num_tx_queues = ctx->ifc_sysctl_ntxqs; 4472 iflib_num_rx_queues = ctx->ifc_sysctl_nrxqs; 4473 bar = ctx->ifc_softc_ctx.isc_msix_bar; 4474 admincnt = sctx->isc_admin_intrcnt; 4475 /* Override by tuneable */ 4476 if (enable_msix == 0) 4477 goto msi; 4478 4479 /* 4480 ** When used in a virtualized environment 4481 ** PCI BUSMASTER capability may not be set 4482 ** so explicity set it here and rewrite 4483 ** the ENABLE in the MSIX control register 4484 ** at this point to cause the host to 4485 ** successfully initialize us. 4486 */ 4487 { 4488 uint16_t pci_cmd_word; 4489 int msix_ctrl, rid; 4490 4491 rid = 0; 4492 pci_cmd_word = pci_read_config(dev, PCIR_COMMAND, 2); 4493 pci_cmd_word |= PCIM_CMD_BUSMASTEREN; 4494 pci_write_config(dev, PCIR_COMMAND, pci_cmd_word, 2); 4495 pci_find_cap(dev, PCIY_MSIX, &rid); 4496 rid += PCIR_MSIX_CTRL; 4497 msix_ctrl = pci_read_config(dev, rid, 2); 4498 msix_ctrl |= PCIM_MSIXCTRL_MSIX_ENABLE; 4499 pci_write_config(dev, rid, msix_ctrl, 2); 4500 } 4501 4502 /* 4503 * bar == -1 => "trust me I know what I'm doing" 4504 * https://www.youtube.com/watch?v=nnwWKkNau4I 4505 * Some drivers are for hardware that is so shoddily 4506 * documented that no one knows which bars are which 4507 * so the developer has to map all bars. This hack 4508 * allows shoddy garbage to use msix in this framework. 4509 */ 4510 if (bar != -1) { 4511 ctx->ifc_msix_mem = bus_alloc_resource_any(dev, 4512 SYS_RES_MEMORY, &bar, RF_ACTIVE); 4513 if (ctx->ifc_msix_mem == NULL) { 4514 /* May not be enabled */ 4515 device_printf(dev, "Unable to map MSIX table \n"); 4516 goto msi; 4517 } 4518 } 4519 /* First try MSI/X */ 4520 if ((msgs = pci_msix_count(dev)) == 0) { /* system has msix disabled */ 4521 device_printf(dev, "System has MSIX disabled \n"); 4522 bus_release_resource(dev, SYS_RES_MEMORY, 4523 bar, ctx->ifc_msix_mem); 4524 ctx->ifc_msix_mem = NULL; 4525 goto msi; 4526 } 4527 #if IFLIB_DEBUG 4528 /* use only 1 qset in debug mode */ 4529 queuemsgs = min(msgs - admincnt, 1); 4530 #else 4531 queuemsgs = msgs - admincnt; 4532 #endif 4533 if (bus_get_cpus(dev, INTR_CPUS, sizeof(ctx->ifc_cpus), &ctx->ifc_cpus) == 0) { 4534 #ifdef RSS 4535 queues = imin(queuemsgs, rss_getnumbuckets()); 4536 #else 4537 queues = queuemsgs; 4538 #endif 4539 queues = imin(CPU_COUNT(&ctx->ifc_cpus), queues); 4540 device_printf(dev, "pxm cpus: %d queue msgs: %d admincnt: %d\n", 4541 CPU_COUNT(&ctx->ifc_cpus), queuemsgs, admincnt); 4542 } else { 4543 device_printf(dev, "Unable to fetch CPU list\n"); 4544 /* Figure out a reasonable auto config value */ 4545 queues = min(queuemsgs, mp_ncpus); 4546 } 4547 #ifdef RSS 4548 /* If we're doing RSS, clamp at the number of RSS buckets */ 4549 if (queues > rss_getnumbuckets()) 4550 queues = rss_getnumbuckets(); 4551 #endif 4552 if (iflib_num_rx_queues > 0 && iflib_num_rx_queues < queues) 4553 queues = rx_queues = iflib_num_rx_queues; 4554 else 4555 rx_queues = queues; 4556 if (iflib_num_tx_queues > 0 && iflib_num_tx_queues < queues) 4557 tx_queues = iflib_num_tx_queues; 4558 else 4559 tx_queues = queues; 4560 4561 device_printf(dev, "using %d rx queues %d tx queues \n", rx_queues, tx_queues); 4562 4563 vectors = queues + admincnt; 4564 if ((err = pci_alloc_msix(dev, &vectors)) == 0) { 4565 device_printf(dev, 4566 "Using MSIX interrupts with %d vectors\n", vectors); 4567 scctx->isc_vectors = vectors; 4568 scctx->isc_nrxqsets = rx_queues; 4569 scctx->isc_ntxqsets = tx_queues; 4570 scctx->isc_intr = IFLIB_INTR_MSIX; 4571 return (vectors); 4572 } else { 4573 device_printf(dev, "failed to allocate %d msix vectors, err: %d - using MSI\n", vectors, err); 4574 } 4575 msi: 4576 vectors = pci_msi_count(dev); 4577 scctx->isc_nrxqsets = 1; 4578 scctx->isc_ntxqsets = 1; 4579 scctx->isc_vectors = vectors; 4580 if (vectors == 1 && pci_alloc_msi(dev, &vectors) == 0) { 4581 device_printf(dev,"Using an MSI interrupt\n"); 4582 scctx->isc_intr = IFLIB_INTR_MSI; 4583 } else { 4584 device_printf(dev,"Using a Legacy interrupt\n"); 4585 scctx->isc_intr = IFLIB_INTR_LEGACY; 4586 } 4587 4588 return (vectors); 4589 } 4590 4591 char * ring_states[] = { "IDLE", "BUSY", "STALLED", "ABDICATED" }; 4592 4593 static int 4594 mp_ring_state_handler(SYSCTL_HANDLER_ARGS) 4595 { 4596 int rc; 4597 uint16_t *state = ((uint16_t *)oidp->oid_arg1); 4598 struct sbuf *sb; 4599 char *ring_state = "UNKNOWN"; 4600 4601 /* XXX needed ? */ 4602 rc = sysctl_wire_old_buffer(req, 0); 4603 MPASS(rc == 0); 4604 if (rc != 0) 4605 return (rc); 4606 sb = sbuf_new_for_sysctl(NULL, NULL, 80, req); 4607 MPASS(sb != NULL); 4608 if (sb == NULL) 4609 return (ENOMEM); 4610 if (state[3] <= 3) 4611 ring_state = ring_states[state[3]]; 4612 4613 sbuf_printf(sb, "pidx_head: %04hd pidx_tail: %04hd cidx: %04hd state: %s", 4614 state[0], state[1], state[2], ring_state); 4615 rc = sbuf_finish(sb); 4616 sbuf_delete(sb); 4617 return(rc); 4618 } 4619 4620 4621 4622 #define NAME_BUFLEN 32 4623 static void 4624 iflib_add_device_sysctl_pre(if_ctx_t ctx) 4625 { 4626 device_t dev = iflib_get_dev(ctx); 4627 struct sysctl_oid_list *child, *oid_list; 4628 struct sysctl_ctx_list *ctx_list; 4629 struct sysctl_oid *node; 4630 4631 ctx_list = device_get_sysctl_ctx(dev); 4632 child = SYSCTL_CHILDREN(device_get_sysctl_tree(dev)); 4633 ctx->ifc_sysctl_node = node = SYSCTL_ADD_NODE(ctx_list, child, OID_AUTO, "iflib", 4634 CTLFLAG_RD, NULL, "IFLIB fields"); 4635 oid_list = SYSCTL_CHILDREN(node); 4636 4637 SYSCTL_ADD_U16(ctx_list, oid_list, OID_AUTO, "override_ntxqs", 4638 CTLFLAG_RWTUN, &ctx->ifc_sysctl_ntxqs, 0, 4639 "# of txqs to use, 0 => use default #"); 4640 SYSCTL_ADD_U16(ctx_list, oid_list, OID_AUTO, "override_nrxqs", 4641 CTLFLAG_RWTUN, &ctx->ifc_sysctl_ntxqs, 0, 4642 "# of txqs to use, 0 => use default #"); 4643 SYSCTL_ADD_U16(ctx_list, oid_list, OID_AUTO, "override_ntxds", 4644 CTLFLAG_RWTUN, &ctx->ifc_sysctl_ntxds, 0, 4645 "# of tx descriptors to use, 0 => use default #"); 4646 SYSCTL_ADD_U16(ctx_list, oid_list, OID_AUTO, "override_nrxds", 4647 CTLFLAG_RWTUN, &ctx->ifc_sysctl_nrxds, 0, 4648 "# of rx descriptors to use, 0 => use default #"); 4649 4650 } 4651 4652 static void 4653 iflib_add_device_sysctl_post(if_ctx_t ctx) 4654 { 4655 if_shared_ctx_t sctx = ctx->ifc_sctx; 4656 if_softc_ctx_t scctx = &ctx->ifc_softc_ctx; 4657 device_t dev = iflib_get_dev(ctx); 4658 struct sysctl_oid_list *child; 4659 struct sysctl_ctx_list *ctx_list; 4660 iflib_fl_t fl; 4661 iflib_txq_t txq; 4662 iflib_rxq_t rxq; 4663 int i, j; 4664 char namebuf[NAME_BUFLEN]; 4665 char *qfmt; 4666 struct sysctl_oid *queue_node, *fl_node, *node; 4667 struct sysctl_oid_list *queue_list, *fl_list; 4668 ctx_list = device_get_sysctl_ctx(dev); 4669 4670 node = ctx->ifc_sysctl_node; 4671 child = SYSCTL_CHILDREN(node); 4672 4673 if (scctx->isc_ntxqsets > 100) 4674 qfmt = "txq%03d"; 4675 else if (scctx->isc_ntxqsets > 10) 4676 qfmt = "txq%02d"; 4677 else 4678 qfmt = "txq%d"; 4679 for (i = 0, txq = ctx->ifc_txqs; i < scctx->isc_ntxqsets; i++, txq++) { 4680 snprintf(namebuf, NAME_BUFLEN, qfmt, i); 4681 queue_node = SYSCTL_ADD_NODE(ctx_list, child, OID_AUTO, namebuf, 4682 CTLFLAG_RD, NULL, "Queue Name"); 4683 queue_list = SYSCTL_CHILDREN(queue_node); 4684 #if MEMORY_LOGGING 4685 SYSCTL_ADD_QUAD(ctx_list, queue_list, OID_AUTO, "txq_dequeued", 4686 CTLFLAG_RD, 4687 &txq->ift_dequeued, "total mbufs freed"); 4688 SYSCTL_ADD_QUAD(ctx_list, queue_list, OID_AUTO, "txq_enqueued", 4689 CTLFLAG_RD, 4690 &txq->ift_enqueued, "total mbufs enqueued"); 4691 #endif 4692 SYSCTL_ADD_QUAD(ctx_list, queue_list, OID_AUTO, "mbuf_defrag", 4693 CTLFLAG_RD, 4694 &txq->ift_mbuf_defrag, "# of times m_defrag was called"); 4695 SYSCTL_ADD_QUAD(ctx_list, queue_list, OID_AUTO, "m_pullups", 4696 CTLFLAG_RD, 4697 &txq->ift_pullups, "# of times m_pullup was called"); 4698 SYSCTL_ADD_QUAD(ctx_list, queue_list, OID_AUTO, "mbuf_defrag_failed", 4699 CTLFLAG_RD, 4700 &txq->ift_mbuf_defrag_failed, "# of times m_defrag failed"); 4701 SYSCTL_ADD_QUAD(ctx_list, queue_list, OID_AUTO, "no_desc_avail", 4702 CTLFLAG_RD, 4703 &txq->ift_mbuf_defrag_failed, "# of times no descriptors were available"); 4704 SYSCTL_ADD_QUAD(ctx_list, queue_list, OID_AUTO, "tx_map_failed", 4705 CTLFLAG_RD, 4706 &txq->ift_map_failed, "# of times dma map failed"); 4707 SYSCTL_ADD_QUAD(ctx_list, queue_list, OID_AUTO, "txd_encap_efbig", 4708 CTLFLAG_RD, 4709 &txq->ift_txd_encap_efbig, "# of times txd_encap returned EFBIG"); 4710 SYSCTL_ADD_QUAD(ctx_list, queue_list, OID_AUTO, "no_tx_dma_setup", 4711 CTLFLAG_RD, 4712 &txq->ift_no_tx_dma_setup, "# of times map failed for other than EFBIG"); 4713 SYSCTL_ADD_U16(ctx_list, queue_list, OID_AUTO, "txq_pidx", 4714 CTLFLAG_RD, 4715 &txq->ift_pidx, 1, "Producer Index"); 4716 SYSCTL_ADD_U16(ctx_list, queue_list, OID_AUTO, "txq_cidx", 4717 CTLFLAG_RD, 4718 &txq->ift_cidx, 1, "Consumer Index"); 4719 SYSCTL_ADD_U16(ctx_list, queue_list, OID_AUTO, "txq_cidx_processed", 4720 CTLFLAG_RD, 4721 &txq->ift_cidx_processed, 1, "Consumer Index seen by credit update"); 4722 SYSCTL_ADD_U16(ctx_list, queue_list, OID_AUTO, "txq_in_use", 4723 CTLFLAG_RD, 4724 &txq->ift_in_use, 1, "descriptors in use"); 4725 SYSCTL_ADD_QUAD(ctx_list, queue_list, OID_AUTO, "txq_processed", 4726 CTLFLAG_RD, 4727 &txq->ift_processed, "descriptors procesed for clean"); 4728 SYSCTL_ADD_QUAD(ctx_list, queue_list, OID_AUTO, "txq_cleaned", 4729 CTLFLAG_RD, 4730 &txq->ift_cleaned, "total cleaned"); 4731 SYSCTL_ADD_PROC(ctx_list, queue_list, OID_AUTO, "ring_state", 4732 CTLTYPE_STRING | CTLFLAG_RD, __DEVOLATILE(uint64_t *, &txq->ift_br[0]->state), 4733 0, mp_ring_state_handler, "A", "soft ring state"); 4734 SYSCTL_ADD_COUNTER_U64(ctx_list, queue_list, OID_AUTO, "r_enqueues", 4735 CTLFLAG_RD, &txq->ift_br[0]->enqueues, 4736 "# of enqueues to the mp_ring for this queue"); 4737 SYSCTL_ADD_COUNTER_U64(ctx_list, queue_list, OID_AUTO, "r_drops", 4738 CTLFLAG_RD, &txq->ift_br[0]->drops, 4739 "# of drops in the mp_ring for this queue"); 4740 SYSCTL_ADD_COUNTER_U64(ctx_list, queue_list, OID_AUTO, "r_starts", 4741 CTLFLAG_RD, &txq->ift_br[0]->starts, 4742 "# of normal consumer starts in the mp_ring for this queue"); 4743 SYSCTL_ADD_COUNTER_U64(ctx_list, queue_list, OID_AUTO, "r_stalls", 4744 CTLFLAG_RD, &txq->ift_br[0]->stalls, 4745 "# of consumer stalls in the mp_ring for this queue"); 4746 SYSCTL_ADD_COUNTER_U64(ctx_list, queue_list, OID_AUTO, "r_restarts", 4747 CTLFLAG_RD, &txq->ift_br[0]->restarts, 4748 "# of consumer restarts in the mp_ring for this queue"); 4749 SYSCTL_ADD_COUNTER_U64(ctx_list, queue_list, OID_AUTO, "r_abdications", 4750 CTLFLAG_RD, &txq->ift_br[0]->abdications, 4751 "# of consumer abdications in the mp_ring for this queue"); 4752 4753 } 4754 4755 if (scctx->isc_nrxqsets > 100) 4756 qfmt = "rxq%03d"; 4757 else if (scctx->isc_nrxqsets > 10) 4758 qfmt = "rxq%02d"; 4759 else 4760 qfmt = "rxq%d"; 4761 for (i = 0, rxq = ctx->ifc_rxqs; i < scctx->isc_nrxqsets; i++, rxq++) { 4762 snprintf(namebuf, NAME_BUFLEN, qfmt, i); 4763 queue_node = SYSCTL_ADD_NODE(ctx_list, child, OID_AUTO, namebuf, 4764 CTLFLAG_RD, NULL, "Queue Name"); 4765 queue_list = SYSCTL_CHILDREN(queue_node); 4766 if (sctx->isc_flags & IFLIB_HAS_CQ) { 4767 SYSCTL_ADD_U16(ctx_list, queue_list, OID_AUTO, "rxq_cq_pidx", 4768 CTLFLAG_RD, 4769 &rxq->ifr_cq_pidx, 1, "Producer Index"); 4770 SYSCTL_ADD_U16(ctx_list, queue_list, OID_AUTO, "rxq_cq_cidx", 4771 CTLFLAG_RD, 4772 &rxq->ifr_cq_cidx, 1, "Consumer Index"); 4773 } 4774 for (j = 0, fl = rxq->ifr_fl; j < rxq->ifr_nfl; j++, fl++) { 4775 snprintf(namebuf, NAME_BUFLEN, "rxq_fl%d", j); 4776 fl_node = SYSCTL_ADD_NODE(ctx_list, queue_list, OID_AUTO, namebuf, 4777 CTLFLAG_RD, NULL, "freelist Name"); 4778 fl_list = SYSCTL_CHILDREN(fl_node); 4779 SYSCTL_ADD_U16(ctx_list, fl_list, OID_AUTO, "pidx", 4780 CTLFLAG_RD, 4781 &fl->ifl_pidx, 1, "Producer Index"); 4782 SYSCTL_ADD_U16(ctx_list, fl_list, OID_AUTO, "cidx", 4783 CTLFLAG_RD, 4784 &fl->ifl_cidx, 1, "Consumer Index"); 4785 SYSCTL_ADD_U16(ctx_list, fl_list, OID_AUTO, "credits", 4786 CTLFLAG_RD, 4787 &fl->ifl_credits, 1, "credits available"); 4788 #if MEMORY_LOGGING 4789 SYSCTL_ADD_QUAD(ctx_list, fl_list, OID_AUTO, "fl_m_enqueued", 4790 CTLFLAG_RD, 4791 &fl->ifl_m_enqueued, "mbufs allocated"); 4792 SYSCTL_ADD_QUAD(ctx_list, fl_list, OID_AUTO, "fl_m_dequeued", 4793 CTLFLAG_RD, 4794 &fl->ifl_m_dequeued, "mbufs freed"); 4795 SYSCTL_ADD_QUAD(ctx_list, fl_list, OID_AUTO, "fl_cl_enqueued", 4796 CTLFLAG_RD, 4797 &fl->ifl_cl_enqueued, "clusters allocated"); 4798 SYSCTL_ADD_QUAD(ctx_list, fl_list, OID_AUTO, "fl_cl_dequeued", 4799 CTLFLAG_RD, 4800 &fl->ifl_cl_dequeued, "clusters freed"); 4801 #endif 4802 4803 } 4804 } 4805 4806 } 4807