1 /*- 2 * Copyright (c) 2014-2018, Matthew Macy <mmacy@mattmacy.io> 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 #include "opt_sched.h" 35 36 #include <sys/param.h> 37 #include <sys/types.h> 38 #include <sys/bus.h> 39 #include <sys/eventhandler.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/sockio.h> 50 #include <sys/sysctl.h> 51 #include <sys/syslog.h> 52 #include <sys/taskqueue.h> 53 #include <sys/limits.h> 54 55 #include <net/if.h> 56 #include <net/if_var.h> 57 #include <net/if_types.h> 58 #include <net/if_media.h> 59 #include <net/bpf.h> 60 #include <net/ethernet.h> 61 #include <net/mp_ring.h> 62 #include <net/debugnet.h> 63 #include <net/pfil.h> 64 #include <net/vnet.h> 65 66 #include <netinet/in.h> 67 #include <netinet/in_pcb.h> 68 #include <netinet/tcp_lro.h> 69 #include <netinet/in_systm.h> 70 #include <netinet/if_ether.h> 71 #include <netinet/ip.h> 72 #include <netinet/ip6.h> 73 #include <netinet/tcp.h> 74 #include <netinet/ip_var.h> 75 #include <netinet6/ip6_var.h> 76 77 #include <machine/bus.h> 78 #include <machine/in_cksum.h> 79 80 #include <vm/vm.h> 81 #include <vm/pmap.h> 82 83 #include <dev/led/led.h> 84 #include <dev/pci/pcireg.h> 85 #include <dev/pci/pcivar.h> 86 #include <dev/pci/pci_private.h> 87 88 #include <net/iflib.h> 89 #include <net/iflib_private.h> 90 91 #include "ifdi_if.h" 92 93 #ifdef PCI_IOV 94 #include <dev/pci/pci_iov.h> 95 #endif 96 97 #include <sys/bitstring.h> 98 /* 99 * enable accounting of every mbuf as it comes in to and goes out of 100 * iflib's software descriptor references 101 */ 102 #define MEMORY_LOGGING 0 103 /* 104 * Enable mbuf vectors for compressing long mbuf chains 105 */ 106 107 /* 108 * NB: 109 * - Prefetching in tx cleaning should perhaps be a tunable. The distance ahead 110 * we prefetch needs to be determined by the time spent in m_free vis a vis 111 * the cost of a prefetch. This will of course vary based on the workload: 112 * - NFLX's m_free path is dominated by vm-based M_EXT manipulation which 113 * is quite expensive, thus suggesting very little prefetch. 114 * - small packet forwarding which is just returning a single mbuf to 115 * UMA will typically be very fast vis a vis the cost of a memory 116 * access. 117 */ 118 119 120 /* 121 * File organization: 122 * - private structures 123 * - iflib private utility functions 124 * - ifnet functions 125 * - vlan registry and other exported functions 126 * - iflib public core functions 127 * 128 * 129 */ 130 MALLOC_DEFINE(M_IFLIB, "iflib", "ifnet library"); 131 132 struct iflib_txq; 133 typedef struct iflib_txq *iflib_txq_t; 134 struct iflib_rxq; 135 typedef struct iflib_rxq *iflib_rxq_t; 136 struct iflib_fl; 137 typedef struct iflib_fl *iflib_fl_t; 138 139 struct iflib_ctx; 140 141 static void iru_init(if_rxd_update_t iru, iflib_rxq_t rxq, uint8_t flid); 142 static void iflib_timer(void *arg); 143 144 typedef struct iflib_filter_info { 145 driver_filter_t *ifi_filter; 146 void *ifi_filter_arg; 147 struct grouptask *ifi_task; 148 void *ifi_ctx; 149 } *iflib_filter_info_t; 150 151 struct iflib_ctx { 152 KOBJ_FIELDS; 153 /* 154 * Pointer to hardware driver's softc 155 */ 156 void *ifc_softc; 157 device_t ifc_dev; 158 if_t ifc_ifp; 159 160 cpuset_t ifc_cpus; 161 if_shared_ctx_t ifc_sctx; 162 struct if_softc_ctx ifc_softc_ctx; 163 164 struct sx ifc_ctx_sx; 165 struct mtx ifc_state_mtx; 166 167 iflib_txq_t ifc_txqs; 168 iflib_rxq_t ifc_rxqs; 169 uint32_t ifc_if_flags; 170 uint32_t ifc_flags; 171 uint32_t ifc_max_fl_buf_size; 172 uint32_t ifc_rx_mbuf_sz; 173 174 int ifc_link_state; 175 int ifc_watchdog_events; 176 struct cdev *ifc_led_dev; 177 struct resource *ifc_msix_mem; 178 179 struct if_irq ifc_legacy_irq; 180 struct grouptask ifc_admin_task; 181 struct grouptask ifc_vflr_task; 182 struct iflib_filter_info ifc_filter_info; 183 struct ifmedia ifc_media; 184 struct ifmedia *ifc_mediap; 185 186 struct sysctl_oid *ifc_sysctl_node; 187 uint16_t ifc_sysctl_ntxqs; 188 uint16_t ifc_sysctl_nrxqs; 189 uint16_t ifc_sysctl_qs_eq_override; 190 uint16_t ifc_sysctl_rx_budget; 191 uint16_t ifc_sysctl_tx_abdicate; 192 uint16_t ifc_sysctl_core_offset; 193 #define CORE_OFFSET_UNSPECIFIED 0xffff 194 uint8_t ifc_sysctl_separate_txrx; 195 196 qidx_t ifc_sysctl_ntxds[8]; 197 qidx_t ifc_sysctl_nrxds[8]; 198 struct if_txrx ifc_txrx; 199 #define isc_txd_encap ifc_txrx.ift_txd_encap 200 #define isc_txd_flush ifc_txrx.ift_txd_flush 201 #define isc_txd_credits_update ifc_txrx.ift_txd_credits_update 202 #define isc_rxd_available ifc_txrx.ift_rxd_available 203 #define isc_rxd_pkt_get ifc_txrx.ift_rxd_pkt_get 204 #define isc_rxd_refill ifc_txrx.ift_rxd_refill 205 #define isc_rxd_flush ifc_txrx.ift_rxd_flush 206 #define isc_rxd_refill ifc_txrx.ift_rxd_refill 207 #define isc_rxd_refill ifc_txrx.ift_rxd_refill 208 #define isc_legacy_intr ifc_txrx.ift_legacy_intr 209 eventhandler_tag ifc_vlan_attach_event; 210 eventhandler_tag ifc_vlan_detach_event; 211 struct ether_addr ifc_mac; 212 }; 213 214 void * 215 iflib_get_softc(if_ctx_t ctx) 216 { 217 218 return (ctx->ifc_softc); 219 } 220 221 device_t 222 iflib_get_dev(if_ctx_t ctx) 223 { 224 225 return (ctx->ifc_dev); 226 } 227 228 if_t 229 iflib_get_ifp(if_ctx_t ctx) 230 { 231 232 return (ctx->ifc_ifp); 233 } 234 235 struct ifmedia * 236 iflib_get_media(if_ctx_t ctx) 237 { 238 239 return (ctx->ifc_mediap); 240 } 241 242 uint32_t 243 iflib_get_flags(if_ctx_t ctx) 244 { 245 return (ctx->ifc_flags); 246 } 247 248 void 249 iflib_set_mac(if_ctx_t ctx, uint8_t mac[ETHER_ADDR_LEN]) 250 { 251 252 bcopy(mac, ctx->ifc_mac.octet, ETHER_ADDR_LEN); 253 } 254 255 if_softc_ctx_t 256 iflib_get_softc_ctx(if_ctx_t ctx) 257 { 258 259 return (&ctx->ifc_softc_ctx); 260 } 261 262 if_shared_ctx_t 263 iflib_get_sctx(if_ctx_t ctx) 264 { 265 266 return (ctx->ifc_sctx); 267 } 268 269 #define IP_ALIGNED(m) ((((uintptr_t)(m)->m_data) & 0x3) == 0x2) 270 #define CACHE_PTR_INCREMENT (CACHE_LINE_SIZE/sizeof(void*)) 271 #define CACHE_PTR_NEXT(ptr) ((void *)(((uintptr_t)(ptr)+CACHE_LINE_SIZE-1) & (CACHE_LINE_SIZE-1))) 272 273 #define LINK_ACTIVE(ctx) ((ctx)->ifc_link_state == LINK_STATE_UP) 274 #define CTX_IS_VF(ctx) ((ctx)->ifc_sctx->isc_flags & IFLIB_IS_VF) 275 276 typedef struct iflib_sw_rx_desc_array { 277 bus_dmamap_t *ifsd_map; /* bus_dma maps for packet */ 278 struct mbuf **ifsd_m; /* pkthdr mbufs */ 279 caddr_t *ifsd_cl; /* direct cluster pointer for rx */ 280 bus_addr_t *ifsd_ba; /* bus addr of cluster for rx */ 281 } iflib_rxsd_array_t; 282 283 typedef struct iflib_sw_tx_desc_array { 284 bus_dmamap_t *ifsd_map; /* bus_dma maps for packet */ 285 bus_dmamap_t *ifsd_tso_map; /* bus_dma maps for TSO packet */ 286 struct mbuf **ifsd_m; /* pkthdr mbufs */ 287 } if_txsd_vec_t; 288 289 /* magic number that should be high enough for any hardware */ 290 #define IFLIB_MAX_TX_SEGS 128 291 #define IFLIB_RX_COPY_THRESH 128 292 #define IFLIB_MAX_RX_REFRESH 32 293 /* The minimum descriptors per second before we start coalescing */ 294 #define IFLIB_MIN_DESC_SEC 16384 295 #define IFLIB_DEFAULT_TX_UPDATE_FREQ 16 296 #define IFLIB_QUEUE_IDLE 0 297 #define IFLIB_QUEUE_HUNG 1 298 #define IFLIB_QUEUE_WORKING 2 299 /* maximum number of txqs that can share an rx interrupt */ 300 #define IFLIB_MAX_TX_SHARED_INTR 4 301 302 /* this should really scale with ring size - this is a fairly arbitrary value */ 303 #define TX_BATCH_SIZE 32 304 305 #define IFLIB_RESTART_BUDGET 8 306 307 #define CSUM_OFFLOAD (CSUM_IP_TSO|CSUM_IP6_TSO|CSUM_IP| \ 308 CSUM_IP_UDP|CSUM_IP_TCP|CSUM_IP_SCTP| \ 309 CSUM_IP6_UDP|CSUM_IP6_TCP|CSUM_IP6_SCTP) 310 311 struct iflib_txq { 312 qidx_t ift_in_use; 313 qidx_t ift_cidx; 314 qidx_t ift_cidx_processed; 315 qidx_t ift_pidx; 316 uint8_t ift_gen; 317 uint8_t ift_br_offset; 318 uint16_t ift_npending; 319 uint16_t ift_db_pending; 320 uint16_t ift_rs_pending; 321 /* implicit pad */ 322 uint8_t ift_txd_size[8]; 323 uint64_t ift_processed; 324 uint64_t ift_cleaned; 325 uint64_t ift_cleaned_prev; 326 #if MEMORY_LOGGING 327 uint64_t ift_enqueued; 328 uint64_t ift_dequeued; 329 #endif 330 uint64_t ift_no_tx_dma_setup; 331 uint64_t ift_no_desc_avail; 332 uint64_t ift_mbuf_defrag_failed; 333 uint64_t ift_mbuf_defrag; 334 uint64_t ift_map_failed; 335 uint64_t ift_txd_encap_efbig; 336 uint64_t ift_pullups; 337 uint64_t ift_last_timer_tick; 338 339 struct mtx ift_mtx; 340 struct mtx ift_db_mtx; 341 342 /* constant values */ 343 if_ctx_t ift_ctx; 344 struct ifmp_ring *ift_br; 345 struct grouptask ift_task; 346 qidx_t ift_size; 347 uint16_t ift_id; 348 struct callout ift_timer; 349 350 if_txsd_vec_t ift_sds; 351 uint8_t ift_qstatus; 352 uint8_t ift_closed; 353 uint8_t ift_update_freq; 354 struct iflib_filter_info ift_filter_info; 355 bus_dma_tag_t ift_buf_tag; 356 bus_dma_tag_t ift_tso_buf_tag; 357 iflib_dma_info_t ift_ifdi; 358 #define MTX_NAME_LEN 16 359 char ift_mtx_name[MTX_NAME_LEN]; 360 bus_dma_segment_t ift_segs[IFLIB_MAX_TX_SEGS] __aligned(CACHE_LINE_SIZE); 361 #ifdef IFLIB_DIAGNOSTICS 362 uint64_t ift_cpu_exec_count[256]; 363 #endif 364 } __aligned(CACHE_LINE_SIZE); 365 366 struct iflib_fl { 367 qidx_t ifl_cidx; 368 qidx_t ifl_pidx; 369 qidx_t ifl_credits; 370 uint8_t ifl_gen; 371 uint8_t ifl_rxd_size; 372 #if MEMORY_LOGGING 373 uint64_t ifl_m_enqueued; 374 uint64_t ifl_m_dequeued; 375 uint64_t ifl_cl_enqueued; 376 uint64_t ifl_cl_dequeued; 377 #endif 378 /* implicit pad */ 379 bitstr_t *ifl_rx_bitmap; 380 qidx_t ifl_fragidx; 381 /* constant */ 382 qidx_t ifl_size; 383 uint16_t ifl_buf_size; 384 uint16_t ifl_cltype; 385 uma_zone_t ifl_zone; 386 iflib_rxsd_array_t ifl_sds; 387 iflib_rxq_t ifl_rxq; 388 uint8_t ifl_id; 389 bus_dma_tag_t ifl_buf_tag; 390 iflib_dma_info_t ifl_ifdi; 391 uint64_t ifl_bus_addrs[IFLIB_MAX_RX_REFRESH] __aligned(CACHE_LINE_SIZE); 392 caddr_t ifl_vm_addrs[IFLIB_MAX_RX_REFRESH]; 393 qidx_t ifl_rxd_idxs[IFLIB_MAX_RX_REFRESH]; 394 } __aligned(CACHE_LINE_SIZE); 395 396 static inline qidx_t 397 get_inuse(int size, qidx_t cidx, qidx_t pidx, uint8_t gen) 398 { 399 qidx_t used; 400 401 if (pidx > cidx) 402 used = pidx - cidx; 403 else if (pidx < cidx) 404 used = size - cidx + pidx; 405 else if (gen == 0 && pidx == cidx) 406 used = 0; 407 else if (gen == 1 && pidx == cidx) 408 used = size; 409 else 410 panic("bad state"); 411 412 return (used); 413 } 414 415 #define TXQ_AVAIL(txq) (txq->ift_size - get_inuse(txq->ift_size, txq->ift_cidx, txq->ift_pidx, txq->ift_gen)) 416 417 #define IDXDIFF(head, tail, wrap) \ 418 ((head) >= (tail) ? (head) - (tail) : (wrap) - (tail) + (head)) 419 420 struct iflib_rxq { 421 if_ctx_t ifr_ctx; 422 iflib_fl_t ifr_fl; 423 uint64_t ifr_rx_irq; 424 struct pfil_head *pfil; 425 /* 426 * If there is a separate completion queue (IFLIB_HAS_RXCQ), this is 427 * the command queue consumer index. Otherwise it's unused. 428 */ 429 qidx_t ifr_cq_cidx; 430 uint16_t ifr_id; 431 uint8_t ifr_nfl; 432 uint8_t ifr_ntxqirq; 433 uint8_t ifr_txqid[IFLIB_MAX_TX_SHARED_INTR]; 434 uint8_t ifr_fl_offset; 435 struct lro_ctrl ifr_lc; 436 struct grouptask ifr_task; 437 struct iflib_filter_info ifr_filter_info; 438 iflib_dma_info_t ifr_ifdi; 439 440 /* dynamically allocate if any drivers need a value substantially larger than this */ 441 struct if_rxd_frag ifr_frags[IFLIB_MAX_RX_SEGS] __aligned(CACHE_LINE_SIZE); 442 #ifdef IFLIB_DIAGNOSTICS 443 uint64_t ifr_cpu_exec_count[256]; 444 #endif 445 } __aligned(CACHE_LINE_SIZE); 446 447 typedef struct if_rxsd { 448 caddr_t *ifsd_cl; 449 iflib_fl_t ifsd_fl; 450 qidx_t ifsd_cidx; 451 } *if_rxsd_t; 452 453 /* multiple of word size */ 454 #ifdef __LP64__ 455 #define PKT_INFO_SIZE 6 456 #define RXD_INFO_SIZE 5 457 #define PKT_TYPE uint64_t 458 #else 459 #define PKT_INFO_SIZE 11 460 #define RXD_INFO_SIZE 8 461 #define PKT_TYPE uint32_t 462 #endif 463 #define PKT_LOOP_BOUND ((PKT_INFO_SIZE/3)*3) 464 #define RXD_LOOP_BOUND ((RXD_INFO_SIZE/4)*4) 465 466 typedef struct if_pkt_info_pad { 467 PKT_TYPE pkt_val[PKT_INFO_SIZE]; 468 } *if_pkt_info_pad_t; 469 typedef struct if_rxd_info_pad { 470 PKT_TYPE rxd_val[RXD_INFO_SIZE]; 471 } *if_rxd_info_pad_t; 472 473 CTASSERT(sizeof(struct if_pkt_info_pad) == sizeof(struct if_pkt_info)); 474 CTASSERT(sizeof(struct if_rxd_info_pad) == sizeof(struct if_rxd_info)); 475 476 477 static inline void 478 pkt_info_zero(if_pkt_info_t pi) 479 { 480 if_pkt_info_pad_t pi_pad; 481 482 pi_pad = (if_pkt_info_pad_t)pi; 483 pi_pad->pkt_val[0] = 0; pi_pad->pkt_val[1] = 0; pi_pad->pkt_val[2] = 0; 484 pi_pad->pkt_val[3] = 0; pi_pad->pkt_val[4] = 0; pi_pad->pkt_val[5] = 0; 485 #ifndef __LP64__ 486 pi_pad->pkt_val[6] = 0; pi_pad->pkt_val[7] = 0; pi_pad->pkt_val[8] = 0; 487 pi_pad->pkt_val[9] = 0; pi_pad->pkt_val[10] = 0; 488 #endif 489 } 490 491 static device_method_t iflib_pseudo_methods[] = { 492 DEVMETHOD(device_attach, noop_attach), 493 DEVMETHOD(device_detach, iflib_pseudo_detach), 494 DEVMETHOD_END 495 }; 496 497 driver_t iflib_pseudodriver = { 498 "iflib_pseudo", iflib_pseudo_methods, sizeof(struct iflib_ctx), 499 }; 500 501 static inline void 502 rxd_info_zero(if_rxd_info_t ri) 503 { 504 if_rxd_info_pad_t ri_pad; 505 int i; 506 507 ri_pad = (if_rxd_info_pad_t)ri; 508 for (i = 0; i < RXD_LOOP_BOUND; i += 4) { 509 ri_pad->rxd_val[i] = 0; 510 ri_pad->rxd_val[i+1] = 0; 511 ri_pad->rxd_val[i+2] = 0; 512 ri_pad->rxd_val[i+3] = 0; 513 } 514 #ifdef __LP64__ 515 ri_pad->rxd_val[RXD_INFO_SIZE-1] = 0; 516 #endif 517 } 518 519 /* 520 * Only allow a single packet to take up most 1/nth of the tx ring 521 */ 522 #define MAX_SINGLE_PACKET_FRACTION 12 523 #define IF_BAD_DMA (bus_addr_t)-1 524 525 #define CTX_ACTIVE(ctx) ((if_getdrvflags((ctx)->ifc_ifp) & IFF_DRV_RUNNING)) 526 527 #define CTX_LOCK_INIT(_sc) sx_init(&(_sc)->ifc_ctx_sx, "iflib ctx lock") 528 #define CTX_LOCK(ctx) sx_xlock(&(ctx)->ifc_ctx_sx) 529 #define CTX_UNLOCK(ctx) sx_xunlock(&(ctx)->ifc_ctx_sx) 530 #define CTX_LOCK_DESTROY(ctx) sx_destroy(&(ctx)->ifc_ctx_sx) 531 532 #define STATE_LOCK_INIT(_sc, _name) mtx_init(&(_sc)->ifc_state_mtx, _name, "iflib state lock", MTX_DEF) 533 #define STATE_LOCK(ctx) mtx_lock(&(ctx)->ifc_state_mtx) 534 #define STATE_UNLOCK(ctx) mtx_unlock(&(ctx)->ifc_state_mtx) 535 #define STATE_LOCK_DESTROY(ctx) mtx_destroy(&(ctx)->ifc_state_mtx) 536 537 #define CALLOUT_LOCK(txq) mtx_lock(&txq->ift_mtx) 538 #define CALLOUT_UNLOCK(txq) mtx_unlock(&txq->ift_mtx) 539 540 void 541 iflib_set_detach(if_ctx_t ctx) 542 { 543 STATE_LOCK(ctx); 544 ctx->ifc_flags |= IFC_IN_DETACH; 545 STATE_UNLOCK(ctx); 546 } 547 548 /* Our boot-time initialization hook */ 549 static int iflib_module_event_handler(module_t, int, void *); 550 551 static moduledata_t iflib_moduledata = { 552 "iflib", 553 iflib_module_event_handler, 554 NULL 555 }; 556 557 DECLARE_MODULE(iflib, iflib_moduledata, SI_SUB_INIT_IF, SI_ORDER_ANY); 558 MODULE_VERSION(iflib, 1); 559 560 MODULE_DEPEND(iflib, pci, 1, 1, 1); 561 MODULE_DEPEND(iflib, ether, 1, 1, 1); 562 563 TASKQGROUP_DEFINE(if_io_tqg, mp_ncpus, 1); 564 TASKQGROUP_DEFINE(if_config_tqg, 1, 1); 565 566 #ifndef IFLIB_DEBUG_COUNTERS 567 #ifdef INVARIANTS 568 #define IFLIB_DEBUG_COUNTERS 1 569 #else 570 #define IFLIB_DEBUG_COUNTERS 0 571 #endif /* !INVARIANTS */ 572 #endif 573 574 static SYSCTL_NODE(_net, OID_AUTO, iflib, CTLFLAG_RD, 0, 575 "iflib driver parameters"); 576 577 /* 578 * XXX need to ensure that this can't accidentally cause the head to be moved backwards 579 */ 580 static int iflib_min_tx_latency = 0; 581 SYSCTL_INT(_net_iflib, OID_AUTO, min_tx_latency, CTLFLAG_RW, 582 &iflib_min_tx_latency, 0, "minimize transmit latency at the possible expense of throughput"); 583 static int iflib_no_tx_batch = 0; 584 SYSCTL_INT(_net_iflib, OID_AUTO, no_tx_batch, CTLFLAG_RW, 585 &iflib_no_tx_batch, 0, "minimize transmit latency at the possible expense of throughput"); 586 587 588 #if IFLIB_DEBUG_COUNTERS 589 590 static int iflib_tx_seen; 591 static int iflib_tx_sent; 592 static int iflib_tx_encap; 593 static int iflib_rx_allocs; 594 static int iflib_fl_refills; 595 static int iflib_fl_refills_large; 596 static int iflib_tx_frees; 597 598 SYSCTL_INT(_net_iflib, OID_AUTO, tx_seen, CTLFLAG_RD, 599 &iflib_tx_seen, 0, "# TX mbufs seen"); 600 SYSCTL_INT(_net_iflib, OID_AUTO, tx_sent, CTLFLAG_RD, 601 &iflib_tx_sent, 0, "# TX mbufs sent"); 602 SYSCTL_INT(_net_iflib, OID_AUTO, tx_encap, CTLFLAG_RD, 603 &iflib_tx_encap, 0, "# TX mbufs encapped"); 604 SYSCTL_INT(_net_iflib, OID_AUTO, tx_frees, CTLFLAG_RD, 605 &iflib_tx_frees, 0, "# TX frees"); 606 SYSCTL_INT(_net_iflib, OID_AUTO, rx_allocs, CTLFLAG_RD, 607 &iflib_rx_allocs, 0, "# RX allocations"); 608 SYSCTL_INT(_net_iflib, OID_AUTO, fl_refills, CTLFLAG_RD, 609 &iflib_fl_refills, 0, "# refills"); 610 SYSCTL_INT(_net_iflib, OID_AUTO, fl_refills_large, CTLFLAG_RD, 611 &iflib_fl_refills_large, 0, "# large refills"); 612 613 614 static int iflib_txq_drain_flushing; 615 static int iflib_txq_drain_oactive; 616 static int iflib_txq_drain_notready; 617 618 SYSCTL_INT(_net_iflib, OID_AUTO, txq_drain_flushing, CTLFLAG_RD, 619 &iflib_txq_drain_flushing, 0, "# drain flushes"); 620 SYSCTL_INT(_net_iflib, OID_AUTO, txq_drain_oactive, CTLFLAG_RD, 621 &iflib_txq_drain_oactive, 0, "# drain oactives"); 622 SYSCTL_INT(_net_iflib, OID_AUTO, txq_drain_notready, CTLFLAG_RD, 623 &iflib_txq_drain_notready, 0, "# drain notready"); 624 625 626 static int iflib_encap_load_mbuf_fail; 627 static int iflib_encap_pad_mbuf_fail; 628 static int iflib_encap_txq_avail_fail; 629 static int iflib_encap_txd_encap_fail; 630 631 SYSCTL_INT(_net_iflib, OID_AUTO, encap_load_mbuf_fail, CTLFLAG_RD, 632 &iflib_encap_load_mbuf_fail, 0, "# busdma load failures"); 633 SYSCTL_INT(_net_iflib, OID_AUTO, encap_pad_mbuf_fail, CTLFLAG_RD, 634 &iflib_encap_pad_mbuf_fail, 0, "# runt frame pad failures"); 635 SYSCTL_INT(_net_iflib, OID_AUTO, encap_txq_avail_fail, CTLFLAG_RD, 636 &iflib_encap_txq_avail_fail, 0, "# txq avail failures"); 637 SYSCTL_INT(_net_iflib, OID_AUTO, encap_txd_encap_fail, CTLFLAG_RD, 638 &iflib_encap_txd_encap_fail, 0, "# driver encap failures"); 639 640 static int iflib_task_fn_rxs; 641 static int iflib_rx_intr_enables; 642 static int iflib_fast_intrs; 643 static int iflib_rx_unavail; 644 static int iflib_rx_ctx_inactive; 645 static int iflib_rx_if_input; 646 static int iflib_rxd_flush; 647 648 static int iflib_verbose_debug; 649 650 SYSCTL_INT(_net_iflib, OID_AUTO, task_fn_rx, CTLFLAG_RD, 651 &iflib_task_fn_rxs, 0, "# task_fn_rx calls"); 652 SYSCTL_INT(_net_iflib, OID_AUTO, rx_intr_enables, CTLFLAG_RD, 653 &iflib_rx_intr_enables, 0, "# RX intr enables"); 654 SYSCTL_INT(_net_iflib, OID_AUTO, fast_intrs, CTLFLAG_RD, 655 &iflib_fast_intrs, 0, "# fast_intr calls"); 656 SYSCTL_INT(_net_iflib, OID_AUTO, rx_unavail, CTLFLAG_RD, 657 &iflib_rx_unavail, 0, "# times rxeof called with no available data"); 658 SYSCTL_INT(_net_iflib, OID_AUTO, rx_ctx_inactive, CTLFLAG_RD, 659 &iflib_rx_ctx_inactive, 0, "# times rxeof called with inactive context"); 660 SYSCTL_INT(_net_iflib, OID_AUTO, rx_if_input, CTLFLAG_RD, 661 &iflib_rx_if_input, 0, "# times rxeof called if_input"); 662 SYSCTL_INT(_net_iflib, OID_AUTO, rxd_flush, CTLFLAG_RD, 663 &iflib_rxd_flush, 0, "# times rxd_flush called"); 664 SYSCTL_INT(_net_iflib, OID_AUTO, verbose_debug, CTLFLAG_RW, 665 &iflib_verbose_debug, 0, "enable verbose debugging"); 666 667 #define DBG_COUNTER_INC(name) atomic_add_int(&(iflib_ ## name), 1) 668 static void 669 iflib_debug_reset(void) 670 { 671 iflib_tx_seen = iflib_tx_sent = iflib_tx_encap = iflib_rx_allocs = 672 iflib_fl_refills = iflib_fl_refills_large = iflib_tx_frees = 673 iflib_txq_drain_flushing = iflib_txq_drain_oactive = 674 iflib_txq_drain_notready = 675 iflib_encap_load_mbuf_fail = iflib_encap_pad_mbuf_fail = 676 iflib_encap_txq_avail_fail = iflib_encap_txd_encap_fail = 677 iflib_task_fn_rxs = iflib_rx_intr_enables = iflib_fast_intrs = 678 iflib_rx_unavail = 679 iflib_rx_ctx_inactive = iflib_rx_if_input = 680 iflib_rxd_flush = 0; 681 } 682 683 #else 684 #define DBG_COUNTER_INC(name) 685 static void iflib_debug_reset(void) {} 686 #endif 687 688 #define IFLIB_DEBUG 0 689 690 static void iflib_tx_structures_free(if_ctx_t ctx); 691 static void iflib_rx_structures_free(if_ctx_t ctx); 692 static int iflib_queues_alloc(if_ctx_t ctx); 693 static int iflib_tx_credits_update(if_ctx_t ctx, iflib_txq_t txq); 694 static int iflib_rxd_avail(if_ctx_t ctx, iflib_rxq_t rxq, qidx_t cidx, qidx_t budget); 695 static int iflib_qset_structures_setup(if_ctx_t ctx); 696 static int iflib_msix_init(if_ctx_t ctx); 697 static int iflib_legacy_setup(if_ctx_t ctx, driver_filter_t filter, void *filterarg, int *rid, const char *str); 698 static void iflib_txq_check_drain(iflib_txq_t txq, int budget); 699 static uint32_t iflib_txq_can_drain(struct ifmp_ring *); 700 #ifdef ALTQ 701 static void iflib_altq_if_start(if_t ifp); 702 static int iflib_altq_if_transmit(if_t ifp, struct mbuf *m); 703 #endif 704 static int iflib_register(if_ctx_t); 705 static void iflib_deregister(if_ctx_t); 706 static void iflib_unregister_vlan_handlers(if_ctx_t ctx); 707 static void iflib_init_locked(if_ctx_t ctx); 708 static void iflib_add_device_sysctl_pre(if_ctx_t ctx); 709 static void iflib_add_device_sysctl_post(if_ctx_t ctx); 710 static void iflib_ifmp_purge(iflib_txq_t txq); 711 static void _iflib_pre_assert(if_softc_ctx_t scctx); 712 static void iflib_if_init_locked(if_ctx_t ctx); 713 static void iflib_free_intr_mem(if_ctx_t ctx); 714 #ifndef __NO_STRICT_ALIGNMENT 715 static struct mbuf * iflib_fixup_rx(struct mbuf *m); 716 #endif 717 718 static SLIST_HEAD(cpu_offset_list, cpu_offset) cpu_offsets = 719 SLIST_HEAD_INITIALIZER(cpu_offsets); 720 struct cpu_offset { 721 SLIST_ENTRY(cpu_offset) entries; 722 cpuset_t set; 723 unsigned int refcount; 724 uint16_t offset; 725 }; 726 static struct mtx cpu_offset_mtx; 727 MTX_SYSINIT(iflib_cpu_offset, &cpu_offset_mtx, "iflib_cpu_offset lock", 728 MTX_DEF); 729 730 DEBUGNET_DEFINE(iflib); 731 732 #ifdef DEV_NETMAP 733 #include <sys/selinfo.h> 734 #include <net/netmap.h> 735 #include <dev/netmap/netmap_kern.h> 736 737 MODULE_DEPEND(iflib, netmap, 1, 1, 1); 738 739 static int netmap_fl_refill(iflib_rxq_t rxq, struct netmap_kring *kring, uint32_t nm_i, bool init); 740 741 /* 742 * device-specific sysctl variables: 743 * 744 * iflib_crcstrip: 0: keep CRC in rx frames (default), 1: strip it. 745 * During regular operations the CRC is stripped, but on some 746 * hardware reception of frames not multiple of 64 is slower, 747 * so using crcstrip=0 helps in benchmarks. 748 * 749 * iflib_rx_miss, iflib_rx_miss_bufs: 750 * count packets that might be missed due to lost interrupts. 751 */ 752 SYSCTL_DECL(_dev_netmap); 753 /* 754 * The xl driver by default strips CRCs and we do not override it. 755 */ 756 757 int iflib_crcstrip = 1; 758 SYSCTL_INT(_dev_netmap, OID_AUTO, iflib_crcstrip, 759 CTLFLAG_RW, &iflib_crcstrip, 1, "strip CRC on RX frames"); 760 761 int iflib_rx_miss, iflib_rx_miss_bufs; 762 SYSCTL_INT(_dev_netmap, OID_AUTO, iflib_rx_miss, 763 CTLFLAG_RW, &iflib_rx_miss, 0, "potentially missed RX intr"); 764 SYSCTL_INT(_dev_netmap, OID_AUTO, iflib_rx_miss_bufs, 765 CTLFLAG_RW, &iflib_rx_miss_bufs, 0, "potentially missed RX intr bufs"); 766 767 /* 768 * Register/unregister. We are already under netmap lock. 769 * Only called on the first register or the last unregister. 770 */ 771 static int 772 iflib_netmap_register(struct netmap_adapter *na, int onoff) 773 { 774 if_t ifp = na->ifp; 775 if_ctx_t ctx = ifp->if_softc; 776 int status; 777 778 CTX_LOCK(ctx); 779 IFDI_INTR_DISABLE(ctx); 780 781 /* Tell the stack that the interface is no longer active */ 782 ifp->if_drv_flags &= ~(IFF_DRV_RUNNING | IFF_DRV_OACTIVE); 783 784 if (!CTX_IS_VF(ctx)) 785 IFDI_CRCSTRIP_SET(ctx, onoff, iflib_crcstrip); 786 787 /* enable or disable flags and callbacks in na and ifp */ 788 if (onoff) { 789 nm_set_native_flags(na); 790 } else { 791 nm_clear_native_flags(na); 792 } 793 iflib_stop(ctx); 794 iflib_init_locked(ctx); 795 IFDI_CRCSTRIP_SET(ctx, onoff, iflib_crcstrip); // XXX why twice ? 796 status = ifp->if_drv_flags & IFF_DRV_RUNNING ? 0 : 1; 797 if (status) 798 nm_clear_native_flags(na); 799 CTX_UNLOCK(ctx); 800 return (status); 801 } 802 803 static int 804 netmap_fl_refill(iflib_rxq_t rxq, struct netmap_kring *kring, uint32_t nm_i, bool init) 805 { 806 struct netmap_adapter *na = kring->na; 807 u_int const lim = kring->nkr_num_slots - 1; 808 u_int head = kring->rhead; 809 struct netmap_ring *ring = kring->ring; 810 bus_dmamap_t *map; 811 struct if_rxd_update iru; 812 if_ctx_t ctx = rxq->ifr_ctx; 813 iflib_fl_t fl = &rxq->ifr_fl[0]; 814 uint32_t refill_pidx, nic_i; 815 #if IFLIB_DEBUG_COUNTERS 816 int rf_count = 0; 817 #endif 818 819 if (nm_i == head && __predict_true(!init)) 820 return 0; 821 iru_init(&iru, rxq, 0 /* flid */); 822 map = fl->ifl_sds.ifsd_map; 823 refill_pidx = netmap_idx_k2n(kring, nm_i); 824 /* 825 * IMPORTANT: we must leave one free slot in the ring, 826 * so move head back by one unit 827 */ 828 head = nm_prev(head, lim); 829 nic_i = UINT_MAX; 830 DBG_COUNTER_INC(fl_refills); 831 while (nm_i != head) { 832 #if IFLIB_DEBUG_COUNTERS 833 if (++rf_count == 9) 834 DBG_COUNTER_INC(fl_refills_large); 835 #endif 836 for (int tmp_pidx = 0; tmp_pidx < IFLIB_MAX_RX_REFRESH && nm_i != head; tmp_pidx++) { 837 struct netmap_slot *slot = &ring->slot[nm_i]; 838 void *addr = PNMB(na, slot, &fl->ifl_bus_addrs[tmp_pidx]); 839 uint32_t nic_i_dma = refill_pidx; 840 nic_i = netmap_idx_k2n(kring, nm_i); 841 842 MPASS(tmp_pidx < IFLIB_MAX_RX_REFRESH); 843 844 if (addr == NETMAP_BUF_BASE(na)) /* bad buf */ 845 return netmap_ring_reinit(kring); 846 847 fl->ifl_vm_addrs[tmp_pidx] = addr; 848 if (__predict_false(init)) { 849 netmap_load_map(na, fl->ifl_buf_tag, 850 map[nic_i], addr); 851 } else if (slot->flags & NS_BUF_CHANGED) { 852 /* buffer has changed, reload map */ 853 netmap_reload_map(na, fl->ifl_buf_tag, 854 map[nic_i], addr); 855 } 856 slot->flags &= ~NS_BUF_CHANGED; 857 858 nm_i = nm_next(nm_i, lim); 859 fl->ifl_rxd_idxs[tmp_pidx] = nic_i = nm_next(nic_i, lim); 860 if (nm_i != head && tmp_pidx < IFLIB_MAX_RX_REFRESH-1) 861 continue; 862 863 iru.iru_pidx = refill_pidx; 864 iru.iru_count = tmp_pidx+1; 865 ctx->isc_rxd_refill(ctx->ifc_softc, &iru); 866 refill_pidx = nic_i; 867 for (int n = 0; n < iru.iru_count; n++) { 868 bus_dmamap_sync(fl->ifl_buf_tag, map[nic_i_dma], 869 BUS_DMASYNC_PREREAD); 870 /* XXX - change this to not use the netmap func*/ 871 nic_i_dma = nm_next(nic_i_dma, lim); 872 } 873 } 874 } 875 kring->nr_hwcur = head; 876 877 bus_dmamap_sync(fl->ifl_ifdi->idi_tag, fl->ifl_ifdi->idi_map, 878 BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); 879 if (__predict_true(nic_i != UINT_MAX)) { 880 ctx->isc_rxd_flush(ctx->ifc_softc, rxq->ifr_id, fl->ifl_id, nic_i); 881 DBG_COUNTER_INC(rxd_flush); 882 } 883 return (0); 884 } 885 886 /* 887 * Reconcile kernel and user view of the transmit ring. 888 * 889 * All information is in the kring. 890 * Userspace wants to send packets up to the one before kring->rhead, 891 * kernel knows kring->nr_hwcur is the first unsent packet. 892 * 893 * Here we push packets out (as many as possible), and possibly 894 * reclaim buffers from previously completed transmission. 895 * 896 * The caller (netmap) guarantees that there is only one instance 897 * running at any time. Any interference with other driver 898 * methods should be handled by the individual drivers. 899 */ 900 static int 901 iflib_netmap_txsync(struct netmap_kring *kring, int flags) 902 { 903 struct netmap_adapter *na = kring->na; 904 if_t ifp = na->ifp; 905 struct netmap_ring *ring = kring->ring; 906 u_int nm_i; /* index into the netmap kring */ 907 u_int nic_i; /* index into the NIC ring */ 908 u_int n; 909 u_int const lim = kring->nkr_num_slots - 1; 910 u_int const head = kring->rhead; 911 struct if_pkt_info pi; 912 913 /* 914 * interrupts on every tx packet are expensive so request 915 * them every half ring, or where NS_REPORT is set 916 */ 917 u_int report_frequency = kring->nkr_num_slots >> 1; 918 /* device-specific */ 919 if_ctx_t ctx = ifp->if_softc; 920 iflib_txq_t txq = &ctx->ifc_txqs[kring->ring_id]; 921 922 bus_dmamap_sync(txq->ift_ifdi->idi_tag, txq->ift_ifdi->idi_map, 923 BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE); 924 925 /* 926 * First part: process new packets to send. 927 * nm_i is the current index in the netmap kring, 928 * nic_i is the corresponding index in the NIC ring. 929 * 930 * If we have packets to send (nm_i != head) 931 * iterate over the netmap ring, fetch length and update 932 * the corresponding slot in the NIC ring. Some drivers also 933 * need to update the buffer's physical address in the NIC slot 934 * even NS_BUF_CHANGED is not set (PNMB computes the addresses). 935 * 936 * The netmap_reload_map() calls is especially expensive, 937 * even when (as in this case) the tag is 0, so do only 938 * when the buffer has actually changed. 939 * 940 * If possible do not set the report/intr bit on all slots, 941 * but only a few times per ring or when NS_REPORT is set. 942 * 943 * Finally, on 10G and faster drivers, it might be useful 944 * to prefetch the next slot and txr entry. 945 */ 946 947 nm_i = kring->nr_hwcur; 948 if (nm_i != head) { /* we have new packets to send */ 949 pkt_info_zero(&pi); 950 pi.ipi_segs = txq->ift_segs; 951 pi.ipi_qsidx = kring->ring_id; 952 nic_i = netmap_idx_k2n(kring, nm_i); 953 954 __builtin_prefetch(&ring->slot[nm_i]); 955 __builtin_prefetch(&txq->ift_sds.ifsd_m[nic_i]); 956 __builtin_prefetch(&txq->ift_sds.ifsd_map[nic_i]); 957 958 for (n = 0; nm_i != head; n++) { 959 struct netmap_slot *slot = &ring->slot[nm_i]; 960 u_int len = slot->len; 961 uint64_t paddr; 962 void *addr = PNMB(na, slot, &paddr); 963 int flags = (slot->flags & NS_REPORT || 964 nic_i == 0 || nic_i == report_frequency) ? 965 IPI_TX_INTR : 0; 966 967 /* device-specific */ 968 pi.ipi_len = len; 969 pi.ipi_segs[0].ds_addr = paddr; 970 pi.ipi_segs[0].ds_len = len; 971 pi.ipi_nsegs = 1; 972 pi.ipi_ndescs = 0; 973 pi.ipi_pidx = nic_i; 974 pi.ipi_flags = flags; 975 976 /* Fill the slot in the NIC ring. */ 977 ctx->isc_txd_encap(ctx->ifc_softc, &pi); 978 DBG_COUNTER_INC(tx_encap); 979 980 /* prefetch for next round */ 981 __builtin_prefetch(&ring->slot[nm_i + 1]); 982 __builtin_prefetch(&txq->ift_sds.ifsd_m[nic_i + 1]); 983 __builtin_prefetch(&txq->ift_sds.ifsd_map[nic_i + 1]); 984 985 NM_CHECK_ADDR_LEN(na, addr, len); 986 987 if (slot->flags & NS_BUF_CHANGED) { 988 /* buffer has changed, reload map */ 989 netmap_reload_map(na, txq->ift_buf_tag, 990 txq->ift_sds.ifsd_map[nic_i], addr); 991 } 992 /* make sure changes to the buffer are synced */ 993 bus_dmamap_sync(txq->ift_buf_tag, 994 txq->ift_sds.ifsd_map[nic_i], 995 BUS_DMASYNC_PREWRITE); 996 997 slot->flags &= ~(NS_REPORT | NS_BUF_CHANGED); 998 nm_i = nm_next(nm_i, lim); 999 nic_i = nm_next(nic_i, lim); 1000 } 1001 kring->nr_hwcur = nm_i; 1002 1003 /* synchronize the NIC ring */ 1004 bus_dmamap_sync(txq->ift_ifdi->idi_tag, txq->ift_ifdi->idi_map, 1005 BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); 1006 1007 /* (re)start the tx unit up to slot nic_i (excluded) */ 1008 ctx->isc_txd_flush(ctx->ifc_softc, txq->ift_id, nic_i); 1009 } 1010 1011 /* 1012 * Second part: reclaim buffers for completed transmissions. 1013 * 1014 * If there are unclaimed buffers, attempt to reclaim them. 1015 * If none are reclaimed, and TX IRQs are not in use, do an initial 1016 * minimal delay, then trigger the tx handler which will spin in the 1017 * group task queue. 1018 */ 1019 if (kring->nr_hwtail != nm_prev(kring->nr_hwcur, lim)) { 1020 if (iflib_tx_credits_update(ctx, txq)) { 1021 /* some tx completed, increment avail */ 1022 nic_i = txq->ift_cidx_processed; 1023 kring->nr_hwtail = nm_prev(netmap_idx_n2k(kring, nic_i), lim); 1024 } 1025 } 1026 if (!(ctx->ifc_flags & IFC_NETMAP_TX_IRQ)) 1027 if (kring->nr_hwtail != nm_prev(kring->nr_hwcur, lim)) { 1028 callout_reset_on(&txq->ift_timer, hz < 2000 ? 1 : hz / 1000, 1029 iflib_timer, txq, txq->ift_timer.c_cpu); 1030 } 1031 return (0); 1032 } 1033 1034 /* 1035 * Reconcile kernel and user view of the receive ring. 1036 * Same as for the txsync, this routine must be efficient. 1037 * The caller guarantees a single invocations, but races against 1038 * the rest of the driver should be handled here. 1039 * 1040 * On call, kring->rhead is the first packet that userspace wants 1041 * to keep, and kring->rcur is the wakeup point. 1042 * The kernel has previously reported packets up to kring->rtail. 1043 * 1044 * If (flags & NAF_FORCE_READ) also check for incoming packets irrespective 1045 * of whether or not we received an interrupt. 1046 */ 1047 static int 1048 iflib_netmap_rxsync(struct netmap_kring *kring, int flags) 1049 { 1050 struct netmap_adapter *na = kring->na; 1051 struct netmap_ring *ring = kring->ring; 1052 if_t ifp = na->ifp; 1053 iflib_fl_t fl; 1054 uint32_t nm_i; /* index into the netmap ring */ 1055 uint32_t nic_i; /* index into the NIC ring */ 1056 u_int i, n; 1057 u_int const lim = kring->nkr_num_slots - 1; 1058 u_int const head = kring->rhead; 1059 int force_update = (flags & NAF_FORCE_READ) || kring->nr_kflags & NKR_PENDINTR; 1060 struct if_rxd_info ri; 1061 1062 if_ctx_t ctx = ifp->if_softc; 1063 iflib_rxq_t rxq = &ctx->ifc_rxqs[kring->ring_id]; 1064 if (head > lim) 1065 return netmap_ring_reinit(kring); 1066 1067 /* 1068 * XXX netmap_fl_refill() only ever (re)fills free list 0 so far. 1069 */ 1070 1071 for (i = 0, fl = rxq->ifr_fl; i < rxq->ifr_nfl; i++, fl++) { 1072 bus_dmamap_sync(fl->ifl_ifdi->idi_tag, fl->ifl_ifdi->idi_map, 1073 BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE); 1074 } 1075 1076 /* 1077 * First part: import newly received packets. 1078 * 1079 * nm_i is the index of the next free slot in the netmap ring, 1080 * nic_i is the index of the next received packet in the NIC ring, 1081 * and they may differ in case if_init() has been called while 1082 * in netmap mode. For the receive ring we have 1083 * 1084 * nic_i = rxr->next_check; 1085 * nm_i = kring->nr_hwtail (previous) 1086 * and 1087 * nm_i == (nic_i + kring->nkr_hwofs) % ring_size 1088 * 1089 * rxr->next_check is set to 0 on a ring reinit 1090 */ 1091 if (netmap_no_pendintr || force_update) { 1092 int crclen = iflib_crcstrip ? 0 : 4; 1093 int error, avail; 1094 1095 for (i = 0; i < rxq->ifr_nfl; i++) { 1096 fl = &rxq->ifr_fl[i]; 1097 nic_i = fl->ifl_cidx; 1098 nm_i = netmap_idx_n2k(kring, nic_i); 1099 avail = ctx->isc_rxd_available(ctx->ifc_softc, 1100 rxq->ifr_id, nic_i, USHRT_MAX); 1101 for (n = 0; avail > 0; n++, avail--) { 1102 rxd_info_zero(&ri); 1103 ri.iri_frags = rxq->ifr_frags; 1104 ri.iri_qsidx = kring->ring_id; 1105 ri.iri_ifp = ctx->ifc_ifp; 1106 ri.iri_cidx = nic_i; 1107 1108 error = ctx->isc_rxd_pkt_get(ctx->ifc_softc, &ri); 1109 ring->slot[nm_i].len = error ? 0 : ri.iri_len - crclen; 1110 ring->slot[nm_i].flags = 0; 1111 bus_dmamap_sync(fl->ifl_buf_tag, 1112 fl->ifl_sds.ifsd_map[nic_i], BUS_DMASYNC_POSTREAD); 1113 nm_i = nm_next(nm_i, lim); 1114 nic_i = nm_next(nic_i, lim); 1115 } 1116 if (n) { /* update the state variables */ 1117 if (netmap_no_pendintr && !force_update) { 1118 /* diagnostics */ 1119 iflib_rx_miss ++; 1120 iflib_rx_miss_bufs += n; 1121 } 1122 fl->ifl_cidx = nic_i; 1123 kring->nr_hwtail = nm_i; 1124 } 1125 kring->nr_kflags &= ~NKR_PENDINTR; 1126 } 1127 } 1128 /* 1129 * Second part: skip past packets that userspace has released. 1130 * (kring->nr_hwcur to head excluded), 1131 * and make the buffers available for reception. 1132 * As usual nm_i is the index in the netmap ring, 1133 * nic_i is the index in the NIC ring, and 1134 * nm_i == (nic_i + kring->nkr_hwofs) % ring_size 1135 */ 1136 /* XXX not sure how this will work with multiple free lists */ 1137 nm_i = kring->nr_hwcur; 1138 1139 return (netmap_fl_refill(rxq, kring, nm_i, false)); 1140 } 1141 1142 static void 1143 iflib_netmap_intr(struct netmap_adapter *na, int onoff) 1144 { 1145 if_ctx_t ctx = na->ifp->if_softc; 1146 1147 CTX_LOCK(ctx); 1148 if (onoff) { 1149 IFDI_INTR_ENABLE(ctx); 1150 } else { 1151 IFDI_INTR_DISABLE(ctx); 1152 } 1153 CTX_UNLOCK(ctx); 1154 } 1155 1156 1157 static int 1158 iflib_netmap_attach(if_ctx_t ctx) 1159 { 1160 struct netmap_adapter na; 1161 if_softc_ctx_t scctx = &ctx->ifc_softc_ctx; 1162 1163 bzero(&na, sizeof(na)); 1164 1165 na.ifp = ctx->ifc_ifp; 1166 na.na_flags = NAF_BDG_MAYSLEEP; 1167 MPASS(ctx->ifc_softc_ctx.isc_ntxqsets); 1168 MPASS(ctx->ifc_softc_ctx.isc_nrxqsets); 1169 1170 na.num_tx_desc = scctx->isc_ntxd[0]; 1171 na.num_rx_desc = scctx->isc_nrxd[0]; 1172 na.nm_txsync = iflib_netmap_txsync; 1173 na.nm_rxsync = iflib_netmap_rxsync; 1174 na.nm_register = iflib_netmap_register; 1175 na.nm_intr = iflib_netmap_intr; 1176 na.num_tx_rings = ctx->ifc_softc_ctx.isc_ntxqsets; 1177 na.num_rx_rings = ctx->ifc_softc_ctx.isc_nrxqsets; 1178 return (netmap_attach(&na)); 1179 } 1180 1181 static void 1182 iflib_netmap_txq_init(if_ctx_t ctx, iflib_txq_t txq) 1183 { 1184 struct netmap_adapter *na = NA(ctx->ifc_ifp); 1185 struct netmap_slot *slot; 1186 1187 slot = netmap_reset(na, NR_TX, txq->ift_id, 0); 1188 if (slot == NULL) 1189 return; 1190 for (int i = 0; i < ctx->ifc_softc_ctx.isc_ntxd[0]; i++) { 1191 1192 /* 1193 * In netmap mode, set the map for the packet buffer. 1194 * NOTE: Some drivers (not this one) also need to set 1195 * the physical buffer address in the NIC ring. 1196 * netmap_idx_n2k() maps a nic index, i, into the corresponding 1197 * netmap slot index, si 1198 */ 1199 int si = netmap_idx_n2k(na->tx_rings[txq->ift_id], i); 1200 netmap_load_map(na, txq->ift_buf_tag, txq->ift_sds.ifsd_map[i], 1201 NMB(na, slot + si)); 1202 } 1203 } 1204 1205 static void 1206 iflib_netmap_rxq_init(if_ctx_t ctx, iflib_rxq_t rxq) 1207 { 1208 struct netmap_adapter *na = NA(ctx->ifc_ifp); 1209 struct netmap_kring *kring = na->rx_rings[rxq->ifr_id]; 1210 struct netmap_slot *slot; 1211 uint32_t nm_i; 1212 1213 slot = netmap_reset(na, NR_RX, rxq->ifr_id, 0); 1214 if (slot == NULL) 1215 return; 1216 nm_i = netmap_idx_n2k(kring, 0); 1217 netmap_fl_refill(rxq, kring, nm_i, true); 1218 } 1219 1220 static void 1221 iflib_netmap_timer_adjust(if_ctx_t ctx, iflib_txq_t txq, uint32_t *reset_on) 1222 { 1223 struct netmap_kring *kring; 1224 uint16_t txqid; 1225 1226 txqid = txq->ift_id; 1227 kring = NA(ctx->ifc_ifp)->tx_rings[txqid]; 1228 1229 if (kring->nr_hwcur != nm_next(kring->nr_hwtail, kring->nkr_num_slots - 1)) { 1230 bus_dmamap_sync(txq->ift_ifdi->idi_tag, txq->ift_ifdi->idi_map, 1231 BUS_DMASYNC_POSTREAD); 1232 if (ctx->isc_txd_credits_update(ctx->ifc_softc, txqid, false)) 1233 netmap_tx_irq(ctx->ifc_ifp, txqid); 1234 if (!(ctx->ifc_flags & IFC_NETMAP_TX_IRQ)) { 1235 if (hz < 2000) 1236 *reset_on = 1; 1237 else 1238 *reset_on = hz / 1000; 1239 } 1240 } 1241 } 1242 1243 #define iflib_netmap_detach(ifp) netmap_detach(ifp) 1244 1245 #else 1246 #define iflib_netmap_txq_init(ctx, txq) 1247 #define iflib_netmap_rxq_init(ctx, rxq) 1248 #define iflib_netmap_detach(ifp) 1249 1250 #define iflib_netmap_attach(ctx) (0) 1251 #define netmap_rx_irq(ifp, qid, budget) (0) 1252 #define netmap_tx_irq(ifp, qid) do {} while (0) 1253 #define iflib_netmap_timer_adjust(ctx, txq, reset_on) 1254 #endif 1255 1256 #if defined(__i386__) || defined(__amd64__) 1257 static __inline void 1258 prefetch(void *x) 1259 { 1260 __asm volatile("prefetcht0 %0" :: "m" (*(unsigned long *)x)); 1261 } 1262 static __inline void 1263 prefetch2cachelines(void *x) 1264 { 1265 __asm volatile("prefetcht0 %0" :: "m" (*(unsigned long *)x)); 1266 #if (CACHE_LINE_SIZE < 128) 1267 __asm volatile("prefetcht0 %0" :: "m" (*(((unsigned long *)x)+CACHE_LINE_SIZE/(sizeof(unsigned long))))); 1268 #endif 1269 } 1270 #else 1271 #define prefetch(x) 1272 #define prefetch2cachelines(x) 1273 #endif 1274 1275 static void 1276 iru_init(if_rxd_update_t iru, iflib_rxq_t rxq, uint8_t flid) 1277 { 1278 iflib_fl_t fl; 1279 1280 fl = &rxq->ifr_fl[flid]; 1281 iru->iru_paddrs = fl->ifl_bus_addrs; 1282 iru->iru_vaddrs = &fl->ifl_vm_addrs[0]; 1283 iru->iru_idxs = fl->ifl_rxd_idxs; 1284 iru->iru_qsidx = rxq->ifr_id; 1285 iru->iru_buf_size = fl->ifl_buf_size; 1286 iru->iru_flidx = fl->ifl_id; 1287 } 1288 1289 static void 1290 _iflib_dmamap_cb(void *arg, bus_dma_segment_t *segs, int nseg, int err) 1291 { 1292 if (err) 1293 return; 1294 *(bus_addr_t *) arg = segs[0].ds_addr; 1295 } 1296 1297 int 1298 iflib_dma_alloc_align(if_ctx_t ctx, int size, int align, iflib_dma_info_t dma, int mapflags) 1299 { 1300 int err; 1301 device_t dev = ctx->ifc_dev; 1302 1303 err = bus_dma_tag_create(bus_get_dma_tag(dev), /* parent */ 1304 align, 0, /* alignment, bounds */ 1305 BUS_SPACE_MAXADDR, /* lowaddr */ 1306 BUS_SPACE_MAXADDR, /* highaddr */ 1307 NULL, NULL, /* filter, filterarg */ 1308 size, /* maxsize */ 1309 1, /* nsegments */ 1310 size, /* maxsegsize */ 1311 BUS_DMA_ALLOCNOW, /* flags */ 1312 NULL, /* lockfunc */ 1313 NULL, /* lockarg */ 1314 &dma->idi_tag); 1315 if (err) { 1316 device_printf(dev, 1317 "%s: bus_dma_tag_create failed: %d\n", 1318 __func__, err); 1319 goto fail_0; 1320 } 1321 1322 err = bus_dmamem_alloc(dma->idi_tag, (void**) &dma->idi_vaddr, 1323 BUS_DMA_NOWAIT | BUS_DMA_COHERENT | BUS_DMA_ZERO, &dma->idi_map); 1324 if (err) { 1325 device_printf(dev, 1326 "%s: bus_dmamem_alloc(%ju) failed: %d\n", 1327 __func__, (uintmax_t)size, err); 1328 goto fail_1; 1329 } 1330 1331 dma->idi_paddr = IF_BAD_DMA; 1332 err = bus_dmamap_load(dma->idi_tag, dma->idi_map, dma->idi_vaddr, 1333 size, _iflib_dmamap_cb, &dma->idi_paddr, mapflags | BUS_DMA_NOWAIT); 1334 if (err || dma->idi_paddr == IF_BAD_DMA) { 1335 device_printf(dev, 1336 "%s: bus_dmamap_load failed: %d\n", 1337 __func__, err); 1338 goto fail_2; 1339 } 1340 1341 dma->idi_size = size; 1342 return (0); 1343 1344 fail_2: 1345 bus_dmamem_free(dma->idi_tag, dma->idi_vaddr, dma->idi_map); 1346 fail_1: 1347 bus_dma_tag_destroy(dma->idi_tag); 1348 fail_0: 1349 dma->idi_tag = NULL; 1350 1351 return (err); 1352 } 1353 1354 int 1355 iflib_dma_alloc(if_ctx_t ctx, int size, iflib_dma_info_t dma, int mapflags) 1356 { 1357 if_shared_ctx_t sctx = ctx->ifc_sctx; 1358 1359 KASSERT(sctx->isc_q_align != 0, ("alignment value not initialized")); 1360 1361 return (iflib_dma_alloc_align(ctx, size, sctx->isc_q_align, dma, mapflags)); 1362 } 1363 1364 int 1365 iflib_dma_alloc_multi(if_ctx_t ctx, int *sizes, iflib_dma_info_t *dmalist, int mapflags, int count) 1366 { 1367 int i, err; 1368 iflib_dma_info_t *dmaiter; 1369 1370 dmaiter = dmalist; 1371 for (i = 0; i < count; i++, dmaiter++) { 1372 if ((err = iflib_dma_alloc(ctx, sizes[i], *dmaiter, mapflags)) != 0) 1373 break; 1374 } 1375 if (err) 1376 iflib_dma_free_multi(dmalist, i); 1377 return (err); 1378 } 1379 1380 void 1381 iflib_dma_free(iflib_dma_info_t dma) 1382 { 1383 if (dma->idi_tag == NULL) 1384 return; 1385 if (dma->idi_paddr != IF_BAD_DMA) { 1386 bus_dmamap_sync(dma->idi_tag, dma->idi_map, 1387 BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE); 1388 bus_dmamap_unload(dma->idi_tag, dma->idi_map); 1389 dma->idi_paddr = IF_BAD_DMA; 1390 } 1391 if (dma->idi_vaddr != NULL) { 1392 bus_dmamem_free(dma->idi_tag, dma->idi_vaddr, dma->idi_map); 1393 dma->idi_vaddr = NULL; 1394 } 1395 bus_dma_tag_destroy(dma->idi_tag); 1396 dma->idi_tag = NULL; 1397 } 1398 1399 void 1400 iflib_dma_free_multi(iflib_dma_info_t *dmalist, int count) 1401 { 1402 int i; 1403 iflib_dma_info_t *dmaiter = dmalist; 1404 1405 for (i = 0; i < count; i++, dmaiter++) 1406 iflib_dma_free(*dmaiter); 1407 } 1408 1409 #ifdef EARLY_AP_STARTUP 1410 static const int iflib_started = 1; 1411 #else 1412 /* 1413 * We used to abuse the smp_started flag to decide if the queues have been 1414 * fully initialized (by late taskqgroup_adjust() calls in a SYSINIT()). 1415 * That gave bad races, since the SYSINIT() runs strictly after smp_started 1416 * is set. Run a SYSINIT() strictly after that to just set a usable 1417 * completion flag. 1418 */ 1419 1420 static int iflib_started; 1421 1422 static void 1423 iflib_record_started(void *arg) 1424 { 1425 iflib_started = 1; 1426 } 1427 1428 SYSINIT(iflib_record_started, SI_SUB_SMP + 1, SI_ORDER_FIRST, 1429 iflib_record_started, NULL); 1430 #endif 1431 1432 static int 1433 iflib_fast_intr(void *arg) 1434 { 1435 iflib_filter_info_t info = arg; 1436 struct grouptask *gtask = info->ifi_task; 1437 int result; 1438 1439 if (!iflib_started) 1440 return (FILTER_STRAY); 1441 1442 DBG_COUNTER_INC(fast_intrs); 1443 if (info->ifi_filter != NULL) { 1444 result = info->ifi_filter(info->ifi_filter_arg); 1445 if ((result & FILTER_SCHEDULE_THREAD) == 0) 1446 return (result); 1447 } 1448 1449 GROUPTASK_ENQUEUE(gtask); 1450 return (FILTER_HANDLED); 1451 } 1452 1453 static int 1454 iflib_fast_intr_rxtx(void *arg) 1455 { 1456 iflib_filter_info_t info = arg; 1457 struct grouptask *gtask = info->ifi_task; 1458 if_ctx_t ctx; 1459 iflib_rxq_t rxq = (iflib_rxq_t)info->ifi_ctx; 1460 iflib_txq_t txq; 1461 void *sc; 1462 int i, cidx, result; 1463 qidx_t txqid; 1464 bool intr_enable, intr_legacy; 1465 1466 if (!iflib_started) 1467 return (FILTER_STRAY); 1468 1469 DBG_COUNTER_INC(fast_intrs); 1470 if (info->ifi_filter != NULL) { 1471 result = info->ifi_filter(info->ifi_filter_arg); 1472 if ((result & FILTER_SCHEDULE_THREAD) == 0) 1473 return (result); 1474 } 1475 1476 ctx = rxq->ifr_ctx; 1477 sc = ctx->ifc_softc; 1478 intr_enable = false; 1479 intr_legacy = !!(ctx->ifc_flags & IFC_LEGACY); 1480 MPASS(rxq->ifr_ntxqirq); 1481 for (i = 0; i < rxq->ifr_ntxqirq; i++) { 1482 txqid = rxq->ifr_txqid[i]; 1483 txq = &ctx->ifc_txqs[txqid]; 1484 bus_dmamap_sync(txq->ift_ifdi->idi_tag, txq->ift_ifdi->idi_map, 1485 BUS_DMASYNC_POSTREAD); 1486 if (!ctx->isc_txd_credits_update(sc, txqid, false)) { 1487 if (intr_legacy) 1488 intr_enable = true; 1489 else 1490 IFDI_TX_QUEUE_INTR_ENABLE(ctx, txqid); 1491 continue; 1492 } 1493 GROUPTASK_ENQUEUE(&txq->ift_task); 1494 } 1495 if (ctx->ifc_sctx->isc_flags & IFLIB_HAS_RXCQ) 1496 cidx = rxq->ifr_cq_cidx; 1497 else 1498 cidx = rxq->ifr_fl[0].ifl_cidx; 1499 if (iflib_rxd_avail(ctx, rxq, cidx, 1)) 1500 GROUPTASK_ENQUEUE(gtask); 1501 else { 1502 if (intr_legacy) 1503 intr_enable = true; 1504 else 1505 IFDI_RX_QUEUE_INTR_ENABLE(ctx, rxq->ifr_id); 1506 DBG_COUNTER_INC(rx_intr_enables); 1507 } 1508 if (intr_enable) 1509 IFDI_INTR_ENABLE(ctx); 1510 return (FILTER_HANDLED); 1511 } 1512 1513 1514 static int 1515 iflib_fast_intr_ctx(void *arg) 1516 { 1517 iflib_filter_info_t info = arg; 1518 struct grouptask *gtask = info->ifi_task; 1519 int result; 1520 1521 if (!iflib_started) 1522 return (FILTER_STRAY); 1523 1524 DBG_COUNTER_INC(fast_intrs); 1525 if (info->ifi_filter != NULL) { 1526 result = info->ifi_filter(info->ifi_filter_arg); 1527 if ((result & FILTER_SCHEDULE_THREAD) == 0) 1528 return (result); 1529 } 1530 1531 GROUPTASK_ENQUEUE(gtask); 1532 return (FILTER_HANDLED); 1533 } 1534 1535 static int 1536 _iflib_irq_alloc(if_ctx_t ctx, if_irq_t irq, int rid, 1537 driver_filter_t filter, driver_intr_t handler, void *arg, 1538 const char *name) 1539 { 1540 struct resource *res; 1541 void *tag = NULL; 1542 device_t dev = ctx->ifc_dev; 1543 int flags, i, rc; 1544 1545 flags = RF_ACTIVE; 1546 if (ctx->ifc_flags & IFC_LEGACY) 1547 flags |= RF_SHAREABLE; 1548 MPASS(rid < 512); 1549 i = rid; 1550 res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &i, flags); 1551 if (res == NULL) { 1552 device_printf(dev, 1553 "failed to allocate IRQ for rid %d, name %s.\n", rid, name); 1554 return (ENOMEM); 1555 } 1556 irq->ii_res = res; 1557 KASSERT(filter == NULL || handler == NULL, ("filter and handler can't both be non-NULL")); 1558 rc = bus_setup_intr(dev, res, INTR_MPSAFE | INTR_TYPE_NET, 1559 filter, handler, arg, &tag); 1560 if (rc != 0) { 1561 device_printf(dev, 1562 "failed to setup interrupt for rid %d, name %s: %d\n", 1563 rid, name ? name : "unknown", rc); 1564 return (rc); 1565 } else if (name) 1566 bus_describe_intr(dev, res, tag, "%s", name); 1567 1568 irq->ii_tag = tag; 1569 return (0); 1570 } 1571 1572 /********************************************************************* 1573 * 1574 * Allocate DMA resources for TX buffers as well as memory for the TX 1575 * mbuf map. TX DMA maps (non-TSO/TSO) and TX mbuf map are kept in a 1576 * iflib_sw_tx_desc_array structure, storing all the information that 1577 * is needed to transmit a packet on the wire. This is called only 1578 * once at attach, setup is done every reset. 1579 * 1580 **********************************************************************/ 1581 static int 1582 iflib_txsd_alloc(iflib_txq_t txq) 1583 { 1584 if_ctx_t ctx = txq->ift_ctx; 1585 if_shared_ctx_t sctx = ctx->ifc_sctx; 1586 if_softc_ctx_t scctx = &ctx->ifc_softc_ctx; 1587 device_t dev = ctx->ifc_dev; 1588 bus_size_t tsomaxsize; 1589 int err, nsegments, ntsosegments; 1590 bool tso; 1591 1592 nsegments = scctx->isc_tx_nsegments; 1593 ntsosegments = scctx->isc_tx_tso_segments_max; 1594 tsomaxsize = scctx->isc_tx_tso_size_max; 1595 if (if_getcapabilities(ctx->ifc_ifp) & IFCAP_VLAN_MTU) 1596 tsomaxsize += sizeof(struct ether_vlan_header); 1597 MPASS(scctx->isc_ntxd[0] > 0); 1598 MPASS(scctx->isc_ntxd[txq->ift_br_offset] > 0); 1599 MPASS(nsegments > 0); 1600 if (if_getcapabilities(ctx->ifc_ifp) & IFCAP_TSO) { 1601 MPASS(ntsosegments > 0); 1602 MPASS(sctx->isc_tso_maxsize >= tsomaxsize); 1603 } 1604 1605 /* 1606 * Set up DMA tags for TX buffers. 1607 */ 1608 if ((err = bus_dma_tag_create(bus_get_dma_tag(dev), 1609 1, 0, /* alignment, bounds */ 1610 BUS_SPACE_MAXADDR, /* lowaddr */ 1611 BUS_SPACE_MAXADDR, /* highaddr */ 1612 NULL, NULL, /* filter, filterarg */ 1613 sctx->isc_tx_maxsize, /* maxsize */ 1614 nsegments, /* nsegments */ 1615 sctx->isc_tx_maxsegsize, /* maxsegsize */ 1616 0, /* flags */ 1617 NULL, /* lockfunc */ 1618 NULL, /* lockfuncarg */ 1619 &txq->ift_buf_tag))) { 1620 device_printf(dev,"Unable to allocate TX DMA tag: %d\n", err); 1621 device_printf(dev,"maxsize: %ju nsegments: %d maxsegsize: %ju\n", 1622 (uintmax_t)sctx->isc_tx_maxsize, nsegments, (uintmax_t)sctx->isc_tx_maxsegsize); 1623 goto fail; 1624 } 1625 tso = (if_getcapabilities(ctx->ifc_ifp) & IFCAP_TSO) != 0; 1626 if (tso && (err = bus_dma_tag_create(bus_get_dma_tag(dev), 1627 1, 0, /* alignment, bounds */ 1628 BUS_SPACE_MAXADDR, /* lowaddr */ 1629 BUS_SPACE_MAXADDR, /* highaddr */ 1630 NULL, NULL, /* filter, filterarg */ 1631 tsomaxsize, /* maxsize */ 1632 ntsosegments, /* nsegments */ 1633 sctx->isc_tso_maxsegsize,/* maxsegsize */ 1634 0, /* flags */ 1635 NULL, /* lockfunc */ 1636 NULL, /* lockfuncarg */ 1637 &txq->ift_tso_buf_tag))) { 1638 device_printf(dev, "Unable to allocate TSO TX DMA tag: %d\n", 1639 err); 1640 goto fail; 1641 } 1642 1643 /* Allocate memory for the TX mbuf map. */ 1644 if (!(txq->ift_sds.ifsd_m = 1645 (struct mbuf **) malloc(sizeof(struct mbuf *) * 1646 scctx->isc_ntxd[txq->ift_br_offset], M_IFLIB, M_NOWAIT | M_ZERO))) { 1647 device_printf(dev, "Unable to allocate TX mbuf map memory\n"); 1648 err = ENOMEM; 1649 goto fail; 1650 } 1651 1652 /* 1653 * Create the DMA maps for TX buffers. 1654 */ 1655 if ((txq->ift_sds.ifsd_map = (bus_dmamap_t *)malloc( 1656 sizeof(bus_dmamap_t) * scctx->isc_ntxd[txq->ift_br_offset], 1657 M_IFLIB, M_NOWAIT | M_ZERO)) == NULL) { 1658 device_printf(dev, 1659 "Unable to allocate TX buffer DMA map memory\n"); 1660 err = ENOMEM; 1661 goto fail; 1662 } 1663 if (tso && (txq->ift_sds.ifsd_tso_map = (bus_dmamap_t *)malloc( 1664 sizeof(bus_dmamap_t) * scctx->isc_ntxd[txq->ift_br_offset], 1665 M_IFLIB, M_NOWAIT | M_ZERO)) == NULL) { 1666 device_printf(dev, 1667 "Unable to allocate TSO TX buffer map memory\n"); 1668 err = ENOMEM; 1669 goto fail; 1670 } 1671 for (int i = 0; i < scctx->isc_ntxd[txq->ift_br_offset]; i++) { 1672 err = bus_dmamap_create(txq->ift_buf_tag, 0, 1673 &txq->ift_sds.ifsd_map[i]); 1674 if (err != 0) { 1675 device_printf(dev, "Unable to create TX DMA map\n"); 1676 goto fail; 1677 } 1678 if (!tso) 1679 continue; 1680 err = bus_dmamap_create(txq->ift_tso_buf_tag, 0, 1681 &txq->ift_sds.ifsd_tso_map[i]); 1682 if (err != 0) { 1683 device_printf(dev, "Unable to create TSO TX DMA map\n"); 1684 goto fail; 1685 } 1686 } 1687 return (0); 1688 fail: 1689 /* We free all, it handles case where we are in the middle */ 1690 iflib_tx_structures_free(ctx); 1691 return (err); 1692 } 1693 1694 static void 1695 iflib_txsd_destroy(if_ctx_t ctx, iflib_txq_t txq, int i) 1696 { 1697 bus_dmamap_t map; 1698 1699 if (txq->ift_sds.ifsd_map != NULL) { 1700 map = txq->ift_sds.ifsd_map[i]; 1701 bus_dmamap_sync(txq->ift_buf_tag, map, BUS_DMASYNC_POSTWRITE); 1702 bus_dmamap_unload(txq->ift_buf_tag, map); 1703 bus_dmamap_destroy(txq->ift_buf_tag, map); 1704 txq->ift_sds.ifsd_map[i] = NULL; 1705 } 1706 1707 if (txq->ift_sds.ifsd_tso_map != NULL) { 1708 map = txq->ift_sds.ifsd_tso_map[i]; 1709 bus_dmamap_sync(txq->ift_tso_buf_tag, map, 1710 BUS_DMASYNC_POSTWRITE); 1711 bus_dmamap_unload(txq->ift_tso_buf_tag, map); 1712 bus_dmamap_destroy(txq->ift_tso_buf_tag, map); 1713 txq->ift_sds.ifsd_tso_map[i] = NULL; 1714 } 1715 } 1716 1717 static void 1718 iflib_txq_destroy(iflib_txq_t txq) 1719 { 1720 if_ctx_t ctx = txq->ift_ctx; 1721 1722 for (int i = 0; i < txq->ift_size; i++) 1723 iflib_txsd_destroy(ctx, txq, i); 1724 1725 if (txq->ift_br != NULL) { 1726 ifmp_ring_free(txq->ift_br); 1727 txq->ift_br = NULL; 1728 } 1729 1730 mtx_destroy(&txq->ift_mtx); 1731 1732 if (txq->ift_sds.ifsd_map != NULL) { 1733 free(txq->ift_sds.ifsd_map, M_IFLIB); 1734 txq->ift_sds.ifsd_map = NULL; 1735 } 1736 if (txq->ift_sds.ifsd_tso_map != NULL) { 1737 free(txq->ift_sds.ifsd_tso_map, M_IFLIB); 1738 txq->ift_sds.ifsd_tso_map = NULL; 1739 } 1740 if (txq->ift_sds.ifsd_m != NULL) { 1741 free(txq->ift_sds.ifsd_m, M_IFLIB); 1742 txq->ift_sds.ifsd_m = NULL; 1743 } 1744 if (txq->ift_buf_tag != NULL) { 1745 bus_dma_tag_destroy(txq->ift_buf_tag); 1746 txq->ift_buf_tag = NULL; 1747 } 1748 if (txq->ift_tso_buf_tag != NULL) { 1749 bus_dma_tag_destroy(txq->ift_tso_buf_tag); 1750 txq->ift_tso_buf_tag = NULL; 1751 } 1752 if (txq->ift_ifdi != NULL) { 1753 free(txq->ift_ifdi, M_IFLIB); 1754 } 1755 } 1756 1757 static void 1758 iflib_txsd_free(if_ctx_t ctx, iflib_txq_t txq, int i) 1759 { 1760 struct mbuf **mp; 1761 1762 mp = &txq->ift_sds.ifsd_m[i]; 1763 if (*mp == NULL) 1764 return; 1765 1766 if (txq->ift_sds.ifsd_map != NULL) { 1767 bus_dmamap_sync(txq->ift_buf_tag, 1768 txq->ift_sds.ifsd_map[i], BUS_DMASYNC_POSTWRITE); 1769 bus_dmamap_unload(txq->ift_buf_tag, txq->ift_sds.ifsd_map[i]); 1770 } 1771 if (txq->ift_sds.ifsd_tso_map != NULL) { 1772 bus_dmamap_sync(txq->ift_tso_buf_tag, 1773 txq->ift_sds.ifsd_tso_map[i], BUS_DMASYNC_POSTWRITE); 1774 bus_dmamap_unload(txq->ift_tso_buf_tag, 1775 txq->ift_sds.ifsd_tso_map[i]); 1776 } 1777 m_free(*mp); 1778 DBG_COUNTER_INC(tx_frees); 1779 *mp = NULL; 1780 } 1781 1782 static int 1783 iflib_txq_setup(iflib_txq_t txq) 1784 { 1785 if_ctx_t ctx = txq->ift_ctx; 1786 if_softc_ctx_t scctx = &ctx->ifc_softc_ctx; 1787 if_shared_ctx_t sctx = ctx->ifc_sctx; 1788 iflib_dma_info_t di; 1789 int i; 1790 1791 /* Set number of descriptors available */ 1792 txq->ift_qstatus = IFLIB_QUEUE_IDLE; 1793 /* XXX make configurable */ 1794 txq->ift_update_freq = IFLIB_DEFAULT_TX_UPDATE_FREQ; 1795 1796 /* Reset indices */ 1797 txq->ift_cidx_processed = 0; 1798 txq->ift_pidx = txq->ift_cidx = txq->ift_npending = 0; 1799 txq->ift_size = scctx->isc_ntxd[txq->ift_br_offset]; 1800 1801 for (i = 0, di = txq->ift_ifdi; i < sctx->isc_ntxqs; i++, di++) 1802 bzero((void *)di->idi_vaddr, di->idi_size); 1803 1804 IFDI_TXQ_SETUP(ctx, txq->ift_id); 1805 for (i = 0, di = txq->ift_ifdi; i < sctx->isc_ntxqs; i++, di++) 1806 bus_dmamap_sync(di->idi_tag, di->idi_map, 1807 BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); 1808 return (0); 1809 } 1810 1811 /********************************************************************* 1812 * 1813 * Allocate DMA resources for RX buffers as well as memory for the RX 1814 * mbuf map, direct RX cluster pointer map and RX cluster bus address 1815 * map. RX DMA map, RX mbuf map, direct RX cluster pointer map and 1816 * RX cluster map are kept in a iflib_sw_rx_desc_array structure. 1817 * Since we use use one entry in iflib_sw_rx_desc_array per received 1818 * packet, the maximum number of entries we'll need is equal to the 1819 * number of hardware receive descriptors that we've allocated. 1820 * 1821 **********************************************************************/ 1822 static int 1823 iflib_rxsd_alloc(iflib_rxq_t rxq) 1824 { 1825 if_ctx_t ctx = rxq->ifr_ctx; 1826 if_shared_ctx_t sctx = ctx->ifc_sctx; 1827 if_softc_ctx_t scctx = &ctx->ifc_softc_ctx; 1828 device_t dev = ctx->ifc_dev; 1829 iflib_fl_t fl; 1830 int err; 1831 1832 MPASS(scctx->isc_nrxd[0] > 0); 1833 MPASS(scctx->isc_nrxd[rxq->ifr_fl_offset] > 0); 1834 1835 fl = rxq->ifr_fl; 1836 for (int i = 0; i < rxq->ifr_nfl; i++, fl++) { 1837 fl->ifl_size = scctx->isc_nrxd[rxq->ifr_fl_offset]; /* this isn't necessarily the same */ 1838 /* Set up DMA tag for RX buffers. */ 1839 err = bus_dma_tag_create(bus_get_dma_tag(dev), /* parent */ 1840 1, 0, /* alignment, bounds */ 1841 BUS_SPACE_MAXADDR, /* lowaddr */ 1842 BUS_SPACE_MAXADDR, /* highaddr */ 1843 NULL, NULL, /* filter, filterarg */ 1844 sctx->isc_rx_maxsize, /* maxsize */ 1845 sctx->isc_rx_nsegments, /* nsegments */ 1846 sctx->isc_rx_maxsegsize, /* maxsegsize */ 1847 0, /* flags */ 1848 NULL, /* lockfunc */ 1849 NULL, /* lockarg */ 1850 &fl->ifl_buf_tag); 1851 if (err) { 1852 device_printf(dev, 1853 "Unable to allocate RX DMA tag: %d\n", err); 1854 goto fail; 1855 } 1856 1857 /* Allocate memory for the RX mbuf map. */ 1858 if (!(fl->ifl_sds.ifsd_m = 1859 (struct mbuf **) malloc(sizeof(struct mbuf *) * 1860 scctx->isc_nrxd[rxq->ifr_fl_offset], M_IFLIB, M_NOWAIT | M_ZERO))) { 1861 device_printf(dev, 1862 "Unable to allocate RX mbuf map memory\n"); 1863 err = ENOMEM; 1864 goto fail; 1865 } 1866 1867 /* Allocate memory for the direct RX cluster pointer map. */ 1868 if (!(fl->ifl_sds.ifsd_cl = 1869 (caddr_t *) malloc(sizeof(caddr_t) * 1870 scctx->isc_nrxd[rxq->ifr_fl_offset], M_IFLIB, M_NOWAIT | M_ZERO))) { 1871 device_printf(dev, 1872 "Unable to allocate RX cluster map memory\n"); 1873 err = ENOMEM; 1874 goto fail; 1875 } 1876 1877 /* Allocate memory for the RX cluster bus address map. */ 1878 if (!(fl->ifl_sds.ifsd_ba = 1879 (bus_addr_t *) malloc(sizeof(bus_addr_t) * 1880 scctx->isc_nrxd[rxq->ifr_fl_offset], M_IFLIB, M_NOWAIT | M_ZERO))) { 1881 device_printf(dev, 1882 "Unable to allocate RX bus address map memory\n"); 1883 err = ENOMEM; 1884 goto fail; 1885 } 1886 1887 /* 1888 * Create the DMA maps for RX buffers. 1889 */ 1890 if (!(fl->ifl_sds.ifsd_map = 1891 (bus_dmamap_t *) malloc(sizeof(bus_dmamap_t) * scctx->isc_nrxd[rxq->ifr_fl_offset], M_IFLIB, M_NOWAIT | M_ZERO))) { 1892 device_printf(dev, 1893 "Unable to allocate RX buffer DMA map memory\n"); 1894 err = ENOMEM; 1895 goto fail; 1896 } 1897 for (int i = 0; i < scctx->isc_nrxd[rxq->ifr_fl_offset]; i++) { 1898 err = bus_dmamap_create(fl->ifl_buf_tag, 0, 1899 &fl->ifl_sds.ifsd_map[i]); 1900 if (err != 0) { 1901 device_printf(dev, "Unable to create RX buffer DMA map\n"); 1902 goto fail; 1903 } 1904 } 1905 } 1906 return (0); 1907 1908 fail: 1909 iflib_rx_structures_free(ctx); 1910 return (err); 1911 } 1912 1913 1914 /* 1915 * Internal service routines 1916 */ 1917 1918 struct rxq_refill_cb_arg { 1919 int error; 1920 bus_dma_segment_t seg; 1921 int nseg; 1922 }; 1923 1924 static void 1925 _rxq_refill_cb(void *arg, bus_dma_segment_t *segs, int nseg, int error) 1926 { 1927 struct rxq_refill_cb_arg *cb_arg = arg; 1928 1929 cb_arg->error = error; 1930 cb_arg->seg = segs[0]; 1931 cb_arg->nseg = nseg; 1932 } 1933 1934 /** 1935 * _iflib_fl_refill - refill an rxq free-buffer list 1936 * @ctx: the iflib context 1937 * @fl: the free list to refill 1938 * @count: the number of new buffers to allocate 1939 * 1940 * (Re)populate an rxq free-buffer list with up to @count new packet buffers. 1941 * The caller must assure that @count does not exceed the queue's capacity. 1942 */ 1943 static void 1944 _iflib_fl_refill(if_ctx_t ctx, iflib_fl_t fl, int count) 1945 { 1946 struct if_rxd_update iru; 1947 struct rxq_refill_cb_arg cb_arg; 1948 struct mbuf *m; 1949 caddr_t cl, *sd_cl; 1950 struct mbuf **sd_m; 1951 bus_dmamap_t *sd_map; 1952 bus_addr_t bus_addr, *sd_ba; 1953 int err, frag_idx, i, idx, n, pidx; 1954 qidx_t credits; 1955 1956 sd_m = fl->ifl_sds.ifsd_m; 1957 sd_map = fl->ifl_sds.ifsd_map; 1958 sd_cl = fl->ifl_sds.ifsd_cl; 1959 sd_ba = fl->ifl_sds.ifsd_ba; 1960 pidx = fl->ifl_pidx; 1961 idx = pidx; 1962 frag_idx = fl->ifl_fragidx; 1963 credits = fl->ifl_credits; 1964 1965 i = 0; 1966 n = count; 1967 MPASS(n > 0); 1968 MPASS(credits + n <= fl->ifl_size); 1969 1970 if (pidx < fl->ifl_cidx) 1971 MPASS(pidx + n <= fl->ifl_cidx); 1972 if (pidx == fl->ifl_cidx && (credits < fl->ifl_size)) 1973 MPASS(fl->ifl_gen == 0); 1974 if (pidx > fl->ifl_cidx) 1975 MPASS(n <= fl->ifl_size - pidx + fl->ifl_cidx); 1976 1977 DBG_COUNTER_INC(fl_refills); 1978 if (n > 8) 1979 DBG_COUNTER_INC(fl_refills_large); 1980 iru_init(&iru, fl->ifl_rxq, fl->ifl_id); 1981 while (n--) { 1982 /* 1983 * We allocate an uninitialized mbuf + cluster, mbuf is 1984 * initialized after rx. 1985 * 1986 * If the cluster is still set then we know a minimum sized packet was received 1987 */ 1988 bit_ffc_at(fl->ifl_rx_bitmap, frag_idx, fl->ifl_size, 1989 &frag_idx); 1990 if (frag_idx < 0) 1991 bit_ffc(fl->ifl_rx_bitmap, fl->ifl_size, &frag_idx); 1992 MPASS(frag_idx >= 0); 1993 if ((cl = sd_cl[frag_idx]) == NULL) { 1994 if ((cl = m_cljget(NULL, M_NOWAIT, fl->ifl_buf_size)) == NULL) 1995 break; 1996 1997 cb_arg.error = 0; 1998 MPASS(sd_map != NULL); 1999 err = bus_dmamap_load(fl->ifl_buf_tag, sd_map[frag_idx], 2000 cl, fl->ifl_buf_size, _rxq_refill_cb, &cb_arg, 2001 BUS_DMA_NOWAIT); 2002 if (err != 0 || cb_arg.error) { 2003 /* 2004 * !zone_pack ? 2005 */ 2006 if (fl->ifl_zone == zone_pack) 2007 uma_zfree(fl->ifl_zone, cl); 2008 break; 2009 } 2010 2011 sd_ba[frag_idx] = bus_addr = cb_arg.seg.ds_addr; 2012 sd_cl[frag_idx] = cl; 2013 #if MEMORY_LOGGING 2014 fl->ifl_cl_enqueued++; 2015 #endif 2016 } else { 2017 bus_addr = sd_ba[frag_idx]; 2018 } 2019 bus_dmamap_sync(fl->ifl_buf_tag, sd_map[frag_idx], 2020 BUS_DMASYNC_PREREAD); 2021 2022 if (sd_m[frag_idx] == NULL) { 2023 if ((m = m_gethdr(M_NOWAIT, MT_NOINIT)) == NULL) { 2024 break; 2025 } 2026 sd_m[frag_idx] = m; 2027 } 2028 bit_set(fl->ifl_rx_bitmap, frag_idx); 2029 #if MEMORY_LOGGING 2030 fl->ifl_m_enqueued++; 2031 #endif 2032 2033 DBG_COUNTER_INC(rx_allocs); 2034 fl->ifl_rxd_idxs[i] = frag_idx; 2035 fl->ifl_bus_addrs[i] = bus_addr; 2036 fl->ifl_vm_addrs[i] = cl; 2037 credits++; 2038 i++; 2039 MPASS(credits <= fl->ifl_size); 2040 if (++idx == fl->ifl_size) { 2041 fl->ifl_gen = 1; 2042 idx = 0; 2043 } 2044 if (n == 0 || i == IFLIB_MAX_RX_REFRESH) { 2045 iru.iru_pidx = pidx; 2046 iru.iru_count = i; 2047 ctx->isc_rxd_refill(ctx->ifc_softc, &iru); 2048 i = 0; 2049 pidx = idx; 2050 fl->ifl_pidx = idx; 2051 fl->ifl_credits = credits; 2052 } 2053 } 2054 2055 if (i) { 2056 iru.iru_pidx = pidx; 2057 iru.iru_count = i; 2058 ctx->isc_rxd_refill(ctx->ifc_softc, &iru); 2059 fl->ifl_pidx = idx; 2060 fl->ifl_credits = credits; 2061 } 2062 DBG_COUNTER_INC(rxd_flush); 2063 if (fl->ifl_pidx == 0) 2064 pidx = fl->ifl_size - 1; 2065 else 2066 pidx = fl->ifl_pidx - 1; 2067 2068 bus_dmamap_sync(fl->ifl_ifdi->idi_tag, fl->ifl_ifdi->idi_map, 2069 BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); 2070 ctx->isc_rxd_flush(ctx->ifc_softc, fl->ifl_rxq->ifr_id, fl->ifl_id, pidx); 2071 fl->ifl_fragidx = frag_idx; 2072 } 2073 2074 static __inline void 2075 __iflib_fl_refill_lt(if_ctx_t ctx, iflib_fl_t fl, int max) 2076 { 2077 /* we avoid allowing pidx to catch up with cidx as it confuses ixl */ 2078 int32_t reclaimable = fl->ifl_size - fl->ifl_credits - 1; 2079 #ifdef INVARIANTS 2080 int32_t delta = fl->ifl_size - get_inuse(fl->ifl_size, fl->ifl_cidx, fl->ifl_pidx, fl->ifl_gen) - 1; 2081 #endif 2082 2083 MPASS(fl->ifl_credits <= fl->ifl_size); 2084 MPASS(reclaimable == delta); 2085 2086 if (reclaimable > 0) 2087 _iflib_fl_refill(ctx, fl, min(max, reclaimable)); 2088 } 2089 2090 uint8_t 2091 iflib_in_detach(if_ctx_t ctx) 2092 { 2093 bool in_detach; 2094 2095 STATE_LOCK(ctx); 2096 in_detach = !!(ctx->ifc_flags & IFC_IN_DETACH); 2097 STATE_UNLOCK(ctx); 2098 return (in_detach); 2099 } 2100 2101 static void 2102 iflib_fl_bufs_free(iflib_fl_t fl) 2103 { 2104 iflib_dma_info_t idi = fl->ifl_ifdi; 2105 bus_dmamap_t sd_map; 2106 uint32_t i; 2107 2108 for (i = 0; i < fl->ifl_size; i++) { 2109 struct mbuf **sd_m = &fl->ifl_sds.ifsd_m[i]; 2110 caddr_t *sd_cl = &fl->ifl_sds.ifsd_cl[i]; 2111 2112 if (*sd_cl != NULL) { 2113 sd_map = fl->ifl_sds.ifsd_map[i]; 2114 bus_dmamap_sync(fl->ifl_buf_tag, sd_map, 2115 BUS_DMASYNC_POSTREAD); 2116 bus_dmamap_unload(fl->ifl_buf_tag, sd_map); 2117 if (*sd_cl != NULL) 2118 uma_zfree(fl->ifl_zone, *sd_cl); 2119 if (*sd_m != NULL) { 2120 m_init(*sd_m, M_NOWAIT, MT_DATA, 0); 2121 uma_zfree(zone_mbuf, *sd_m); 2122 } 2123 } else { 2124 MPASS(*sd_cl == NULL); 2125 MPASS(*sd_m == NULL); 2126 } 2127 #if MEMORY_LOGGING 2128 fl->ifl_m_dequeued++; 2129 fl->ifl_cl_dequeued++; 2130 #endif 2131 *sd_cl = NULL; 2132 *sd_m = NULL; 2133 } 2134 #ifdef INVARIANTS 2135 for (i = 0; i < fl->ifl_size; i++) { 2136 MPASS(fl->ifl_sds.ifsd_cl[i] == NULL); 2137 MPASS(fl->ifl_sds.ifsd_m[i] == NULL); 2138 } 2139 #endif 2140 /* 2141 * Reset free list values 2142 */ 2143 fl->ifl_credits = fl->ifl_cidx = fl->ifl_pidx = fl->ifl_gen = fl->ifl_fragidx = 0; 2144 bzero(idi->idi_vaddr, idi->idi_size); 2145 } 2146 2147 /********************************************************************* 2148 * 2149 * Initialize a free list and its buffers. 2150 * 2151 **********************************************************************/ 2152 static int 2153 iflib_fl_setup(iflib_fl_t fl) 2154 { 2155 iflib_rxq_t rxq = fl->ifl_rxq; 2156 if_ctx_t ctx = rxq->ifr_ctx; 2157 2158 bit_nclear(fl->ifl_rx_bitmap, 0, fl->ifl_size - 1); 2159 /* 2160 ** Free current RX buffer structs and their mbufs 2161 */ 2162 iflib_fl_bufs_free(fl); 2163 /* Now replenish the mbufs */ 2164 MPASS(fl->ifl_credits == 0); 2165 fl->ifl_buf_size = ctx->ifc_rx_mbuf_sz; 2166 if (fl->ifl_buf_size > ctx->ifc_max_fl_buf_size) 2167 ctx->ifc_max_fl_buf_size = fl->ifl_buf_size; 2168 fl->ifl_cltype = m_gettype(fl->ifl_buf_size); 2169 fl->ifl_zone = m_getzone(fl->ifl_buf_size); 2170 2171 2172 /* avoid pre-allocating zillions of clusters to an idle card 2173 * potentially speeding up attach 2174 */ 2175 _iflib_fl_refill(ctx, fl, min(128, fl->ifl_size)); 2176 MPASS(min(128, fl->ifl_size) == fl->ifl_credits); 2177 if (min(128, fl->ifl_size) != fl->ifl_credits) 2178 return (ENOBUFS); 2179 /* 2180 * handle failure 2181 */ 2182 MPASS(rxq != NULL); 2183 MPASS(fl->ifl_ifdi != NULL); 2184 bus_dmamap_sync(fl->ifl_ifdi->idi_tag, fl->ifl_ifdi->idi_map, 2185 BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); 2186 return (0); 2187 } 2188 2189 /********************************************************************* 2190 * 2191 * Free receive ring data structures 2192 * 2193 **********************************************************************/ 2194 static void 2195 iflib_rx_sds_free(iflib_rxq_t rxq) 2196 { 2197 iflib_fl_t fl; 2198 int i, j; 2199 2200 if (rxq->ifr_fl != NULL) { 2201 for (i = 0; i < rxq->ifr_nfl; i++) { 2202 fl = &rxq->ifr_fl[i]; 2203 if (fl->ifl_buf_tag != NULL) { 2204 if (fl->ifl_sds.ifsd_map != NULL) { 2205 for (j = 0; j < fl->ifl_size; j++) { 2206 bus_dmamap_sync( 2207 fl->ifl_buf_tag, 2208 fl->ifl_sds.ifsd_map[j], 2209 BUS_DMASYNC_POSTREAD); 2210 bus_dmamap_unload( 2211 fl->ifl_buf_tag, 2212 fl->ifl_sds.ifsd_map[j]); 2213 bus_dmamap_destroy( 2214 fl->ifl_buf_tag, 2215 fl->ifl_sds.ifsd_map[j]); 2216 } 2217 } 2218 bus_dma_tag_destroy(fl->ifl_buf_tag); 2219 fl->ifl_buf_tag = NULL; 2220 } 2221 free(fl->ifl_sds.ifsd_m, M_IFLIB); 2222 free(fl->ifl_sds.ifsd_cl, M_IFLIB); 2223 free(fl->ifl_sds.ifsd_ba, M_IFLIB); 2224 free(fl->ifl_sds.ifsd_map, M_IFLIB); 2225 fl->ifl_sds.ifsd_m = NULL; 2226 fl->ifl_sds.ifsd_cl = NULL; 2227 fl->ifl_sds.ifsd_ba = NULL; 2228 fl->ifl_sds.ifsd_map = NULL; 2229 } 2230 free(rxq->ifr_fl, M_IFLIB); 2231 rxq->ifr_fl = NULL; 2232 free(rxq->ifr_ifdi, M_IFLIB); 2233 rxq->ifr_ifdi = NULL; 2234 rxq->ifr_cq_cidx = 0; 2235 } 2236 } 2237 2238 /* 2239 * Timer routine 2240 */ 2241 static void 2242 iflib_timer(void *arg) 2243 { 2244 iflib_txq_t txq = arg; 2245 if_ctx_t ctx = txq->ift_ctx; 2246 if_softc_ctx_t sctx = &ctx->ifc_softc_ctx; 2247 uint64_t this_tick = ticks; 2248 uint32_t reset_on = hz / 2; 2249 2250 if (!(if_getdrvflags(ctx->ifc_ifp) & IFF_DRV_RUNNING)) 2251 return; 2252 2253 /* 2254 ** Check on the state of the TX queue(s), this 2255 ** can be done without the lock because its RO 2256 ** and the HUNG state will be static if set. 2257 */ 2258 if (this_tick - txq->ift_last_timer_tick >= hz / 2) { 2259 txq->ift_last_timer_tick = this_tick; 2260 IFDI_TIMER(ctx, txq->ift_id); 2261 if ((txq->ift_qstatus == IFLIB_QUEUE_HUNG) && 2262 ((txq->ift_cleaned_prev == txq->ift_cleaned) || 2263 (sctx->isc_pause_frames == 0))) 2264 goto hung; 2265 2266 if (txq->ift_qstatus != IFLIB_QUEUE_IDLE && 2267 ifmp_ring_is_stalled(txq->ift_br)) { 2268 KASSERT(ctx->ifc_link_state == LINK_STATE_UP, ("queue can't be marked as hung if interface is down")); 2269 txq->ift_qstatus = IFLIB_QUEUE_HUNG; 2270 } 2271 txq->ift_cleaned_prev = txq->ift_cleaned; 2272 } 2273 #ifdef DEV_NETMAP 2274 if (if_getcapenable(ctx->ifc_ifp) & IFCAP_NETMAP) 2275 iflib_netmap_timer_adjust(ctx, txq, &reset_on); 2276 #endif 2277 /* handle any laggards */ 2278 if (txq->ift_db_pending) 2279 GROUPTASK_ENQUEUE(&txq->ift_task); 2280 2281 sctx->isc_pause_frames = 0; 2282 if (if_getdrvflags(ctx->ifc_ifp) & IFF_DRV_RUNNING) 2283 callout_reset_on(&txq->ift_timer, reset_on, iflib_timer, txq, txq->ift_timer.c_cpu); 2284 return; 2285 2286 hung: 2287 device_printf(ctx->ifc_dev, 2288 "Watchdog timeout (TX: %d desc avail: %d pidx: %d) -- resetting\n", 2289 txq->ift_id, TXQ_AVAIL(txq), txq->ift_pidx); 2290 STATE_LOCK(ctx); 2291 if_setdrvflagbits(ctx->ifc_ifp, IFF_DRV_OACTIVE, IFF_DRV_RUNNING); 2292 ctx->ifc_flags |= (IFC_DO_WATCHDOG|IFC_DO_RESET); 2293 iflib_admin_intr_deferred(ctx); 2294 STATE_UNLOCK(ctx); 2295 } 2296 2297 static void 2298 iflib_calc_rx_mbuf_sz(if_ctx_t ctx) 2299 { 2300 if_softc_ctx_t sctx = &ctx->ifc_softc_ctx; 2301 2302 /* 2303 * XXX don't set the max_frame_size to larger 2304 * than the hardware can handle 2305 */ 2306 if (sctx->isc_max_frame_size <= MCLBYTES) 2307 ctx->ifc_rx_mbuf_sz = MCLBYTES; 2308 else 2309 ctx->ifc_rx_mbuf_sz = MJUMPAGESIZE; 2310 } 2311 2312 uint32_t 2313 iflib_get_rx_mbuf_sz(if_ctx_t ctx) 2314 { 2315 2316 return (ctx->ifc_rx_mbuf_sz); 2317 } 2318 2319 static void 2320 iflib_init_locked(if_ctx_t ctx) 2321 { 2322 if_softc_ctx_t sctx = &ctx->ifc_softc_ctx; 2323 if_softc_ctx_t scctx = &ctx->ifc_softc_ctx; 2324 if_t ifp = ctx->ifc_ifp; 2325 iflib_fl_t fl; 2326 iflib_txq_t txq; 2327 iflib_rxq_t rxq; 2328 int i, j, tx_ip_csum_flags, tx_ip6_csum_flags; 2329 2330 if_setdrvflagbits(ifp, IFF_DRV_OACTIVE, IFF_DRV_RUNNING); 2331 IFDI_INTR_DISABLE(ctx); 2332 2333 tx_ip_csum_flags = scctx->isc_tx_csum_flags & (CSUM_IP | CSUM_TCP | CSUM_UDP | CSUM_SCTP); 2334 tx_ip6_csum_flags = scctx->isc_tx_csum_flags & (CSUM_IP6_TCP | CSUM_IP6_UDP | CSUM_IP6_SCTP); 2335 /* Set hardware offload abilities */ 2336 if_clearhwassist(ifp); 2337 if (if_getcapenable(ifp) & IFCAP_TXCSUM) 2338 if_sethwassistbits(ifp, tx_ip_csum_flags, 0); 2339 if (if_getcapenable(ifp) & IFCAP_TXCSUM_IPV6) 2340 if_sethwassistbits(ifp, tx_ip6_csum_flags, 0); 2341 if (if_getcapenable(ifp) & IFCAP_TSO4) 2342 if_sethwassistbits(ifp, CSUM_IP_TSO, 0); 2343 if (if_getcapenable(ifp) & IFCAP_TSO6) 2344 if_sethwassistbits(ifp, CSUM_IP6_TSO, 0); 2345 2346 for (i = 0, txq = ctx->ifc_txqs; i < sctx->isc_ntxqsets; i++, txq++) { 2347 CALLOUT_LOCK(txq); 2348 callout_stop(&txq->ift_timer); 2349 CALLOUT_UNLOCK(txq); 2350 iflib_netmap_txq_init(ctx, txq); 2351 } 2352 2353 /* 2354 * Calculate a suitable Rx mbuf size prior to calling IFDI_INIT, so 2355 * that drivers can use the value when setting up the hardware receive 2356 * buffers. 2357 */ 2358 iflib_calc_rx_mbuf_sz(ctx); 2359 2360 #ifdef INVARIANTS 2361 i = if_getdrvflags(ifp); 2362 #endif 2363 IFDI_INIT(ctx); 2364 MPASS(if_getdrvflags(ifp) == i); 2365 for (i = 0, rxq = ctx->ifc_rxqs; i < sctx->isc_nrxqsets; i++, rxq++) { 2366 /* XXX this should really be done on a per-queue basis */ 2367 if (if_getcapenable(ifp) & IFCAP_NETMAP) { 2368 MPASS(rxq->ifr_id == i); 2369 iflib_netmap_rxq_init(ctx, rxq); 2370 continue; 2371 } 2372 for (j = 0, fl = rxq->ifr_fl; j < rxq->ifr_nfl; j++, fl++) { 2373 if (iflib_fl_setup(fl)) { 2374 device_printf(ctx->ifc_dev, 2375 "setting up free list %d failed - " 2376 "check cluster settings\n", j); 2377 goto done; 2378 } 2379 } 2380 } 2381 done: 2382 if_setdrvflagbits(ctx->ifc_ifp, IFF_DRV_RUNNING, IFF_DRV_OACTIVE); 2383 IFDI_INTR_ENABLE(ctx); 2384 txq = ctx->ifc_txqs; 2385 for (i = 0; i < sctx->isc_ntxqsets; i++, txq++) 2386 callout_reset_on(&txq->ift_timer, hz/2, iflib_timer, txq, 2387 txq->ift_timer.c_cpu); 2388 } 2389 2390 static int 2391 iflib_media_change(if_t ifp) 2392 { 2393 if_ctx_t ctx = if_getsoftc(ifp); 2394 int err; 2395 2396 CTX_LOCK(ctx); 2397 if ((err = IFDI_MEDIA_CHANGE(ctx)) == 0) 2398 iflib_init_locked(ctx); 2399 CTX_UNLOCK(ctx); 2400 return (err); 2401 } 2402 2403 static void 2404 iflib_media_status(if_t ifp, struct ifmediareq *ifmr) 2405 { 2406 if_ctx_t ctx = if_getsoftc(ifp); 2407 2408 CTX_LOCK(ctx); 2409 IFDI_UPDATE_ADMIN_STATUS(ctx); 2410 IFDI_MEDIA_STATUS(ctx, ifmr); 2411 CTX_UNLOCK(ctx); 2412 } 2413 2414 void 2415 iflib_stop(if_ctx_t ctx) 2416 { 2417 iflib_txq_t txq = ctx->ifc_txqs; 2418 iflib_rxq_t rxq = ctx->ifc_rxqs; 2419 if_softc_ctx_t scctx = &ctx->ifc_softc_ctx; 2420 if_shared_ctx_t sctx = ctx->ifc_sctx; 2421 iflib_dma_info_t di; 2422 iflib_fl_t fl; 2423 int i, j; 2424 2425 /* Tell the stack that the interface is no longer active */ 2426 if_setdrvflagbits(ctx->ifc_ifp, IFF_DRV_OACTIVE, IFF_DRV_RUNNING); 2427 2428 IFDI_INTR_DISABLE(ctx); 2429 DELAY(1000); 2430 IFDI_STOP(ctx); 2431 DELAY(1000); 2432 2433 iflib_debug_reset(); 2434 /* Wait for current tx queue users to exit to disarm watchdog timer. */ 2435 for (i = 0; i < scctx->isc_ntxqsets; i++, txq++) { 2436 /* make sure all transmitters have completed before proceeding XXX */ 2437 2438 CALLOUT_LOCK(txq); 2439 callout_stop(&txq->ift_timer); 2440 CALLOUT_UNLOCK(txq); 2441 2442 /* clean any enqueued buffers */ 2443 iflib_ifmp_purge(txq); 2444 /* Free any existing tx buffers. */ 2445 for (j = 0; j < txq->ift_size; j++) { 2446 iflib_txsd_free(ctx, txq, j); 2447 } 2448 txq->ift_processed = txq->ift_cleaned = txq->ift_cidx_processed = 0; 2449 txq->ift_in_use = txq->ift_gen = txq->ift_cidx = txq->ift_pidx = txq->ift_no_desc_avail = 0; 2450 txq->ift_closed = txq->ift_mbuf_defrag = txq->ift_mbuf_defrag_failed = 0; 2451 txq->ift_no_tx_dma_setup = txq->ift_txd_encap_efbig = txq->ift_map_failed = 0; 2452 txq->ift_pullups = 0; 2453 ifmp_ring_reset_stats(txq->ift_br); 2454 for (j = 0, di = txq->ift_ifdi; j < sctx->isc_ntxqs; j++, di++) 2455 bzero((void *)di->idi_vaddr, di->idi_size); 2456 } 2457 for (i = 0; i < scctx->isc_nrxqsets; i++, rxq++) { 2458 /* make sure all transmitters have completed before proceeding XXX */ 2459 2460 rxq->ifr_cq_cidx = 0; 2461 for (j = 0, di = rxq->ifr_ifdi; j < sctx->isc_nrxqs; j++, di++) 2462 bzero((void *)di->idi_vaddr, di->idi_size); 2463 /* also resets the free lists pidx/cidx */ 2464 for (j = 0, fl = rxq->ifr_fl; j < rxq->ifr_nfl; j++, fl++) 2465 iflib_fl_bufs_free(fl); 2466 } 2467 } 2468 2469 static inline caddr_t 2470 calc_next_rxd(iflib_fl_t fl, int cidx) 2471 { 2472 qidx_t size; 2473 int nrxd; 2474 caddr_t start, end, cur, next; 2475 2476 nrxd = fl->ifl_size; 2477 size = fl->ifl_rxd_size; 2478 start = fl->ifl_ifdi->idi_vaddr; 2479 2480 if (__predict_false(size == 0)) 2481 return (start); 2482 cur = start + size*cidx; 2483 end = start + size*nrxd; 2484 next = CACHE_PTR_NEXT(cur); 2485 return (next < end ? next : start); 2486 } 2487 2488 static inline void 2489 prefetch_pkts(iflib_fl_t fl, int cidx) 2490 { 2491 int nextptr; 2492 int nrxd = fl->ifl_size; 2493 caddr_t next_rxd; 2494 2495 2496 nextptr = (cidx + CACHE_PTR_INCREMENT) & (nrxd-1); 2497 prefetch(&fl->ifl_sds.ifsd_m[nextptr]); 2498 prefetch(&fl->ifl_sds.ifsd_cl[nextptr]); 2499 next_rxd = calc_next_rxd(fl, cidx); 2500 prefetch(next_rxd); 2501 prefetch(fl->ifl_sds.ifsd_m[(cidx + 1) & (nrxd-1)]); 2502 prefetch(fl->ifl_sds.ifsd_m[(cidx + 2) & (nrxd-1)]); 2503 prefetch(fl->ifl_sds.ifsd_m[(cidx + 3) & (nrxd-1)]); 2504 prefetch(fl->ifl_sds.ifsd_m[(cidx + 4) & (nrxd-1)]); 2505 prefetch(fl->ifl_sds.ifsd_cl[(cidx + 1) & (nrxd-1)]); 2506 prefetch(fl->ifl_sds.ifsd_cl[(cidx + 2) & (nrxd-1)]); 2507 prefetch(fl->ifl_sds.ifsd_cl[(cidx + 3) & (nrxd-1)]); 2508 prefetch(fl->ifl_sds.ifsd_cl[(cidx + 4) & (nrxd-1)]); 2509 } 2510 2511 static struct mbuf * 2512 rxd_frag_to_sd(iflib_rxq_t rxq, if_rxd_frag_t irf, bool unload, if_rxsd_t sd, 2513 int *pf_rv, if_rxd_info_t ri) 2514 { 2515 bus_dmamap_t map; 2516 iflib_fl_t fl; 2517 caddr_t payload; 2518 struct mbuf *m; 2519 int flid, cidx, len, next; 2520 2521 map = NULL; 2522 flid = irf->irf_flid; 2523 cidx = irf->irf_idx; 2524 fl = &rxq->ifr_fl[flid]; 2525 sd->ifsd_fl = fl; 2526 sd->ifsd_cidx = cidx; 2527 m = fl->ifl_sds.ifsd_m[cidx]; 2528 sd->ifsd_cl = &fl->ifl_sds.ifsd_cl[cidx]; 2529 fl->ifl_credits--; 2530 #if MEMORY_LOGGING 2531 fl->ifl_m_dequeued++; 2532 #endif 2533 if (rxq->ifr_ctx->ifc_flags & IFC_PREFETCH) 2534 prefetch_pkts(fl, cidx); 2535 next = (cidx + CACHE_PTR_INCREMENT) & (fl->ifl_size-1); 2536 prefetch(&fl->ifl_sds.ifsd_map[next]); 2537 map = fl->ifl_sds.ifsd_map[cidx]; 2538 next = (cidx + CACHE_LINE_SIZE) & (fl->ifl_size-1); 2539 2540 /* not valid assert if bxe really does SGE from non-contiguous elements */ 2541 MPASS(fl->ifl_cidx == cidx); 2542 bus_dmamap_sync(fl->ifl_buf_tag, map, BUS_DMASYNC_POSTREAD); 2543 2544 if (rxq->pfil != NULL && PFIL_HOOKED_IN(rxq->pfil) && pf_rv != NULL) { 2545 payload = *sd->ifsd_cl; 2546 payload += ri->iri_pad; 2547 len = ri->iri_len - ri->iri_pad; 2548 *pf_rv = pfil_run_hooks(rxq->pfil, payload, ri->iri_ifp, 2549 len | PFIL_MEMPTR | PFIL_IN, NULL); 2550 switch (*pf_rv) { 2551 case PFIL_DROPPED: 2552 case PFIL_CONSUMED: 2553 /* 2554 * The filter ate it. Everything is recycled. 2555 */ 2556 m = NULL; 2557 unload = 0; 2558 break; 2559 case PFIL_REALLOCED: 2560 /* 2561 * The filter copied it. Everything is recycled. 2562 */ 2563 m = pfil_mem2mbuf(payload); 2564 unload = 0; 2565 break; 2566 case PFIL_PASS: 2567 /* 2568 * Filter said it was OK, so receive like 2569 * normal 2570 */ 2571 fl->ifl_sds.ifsd_m[cidx] = NULL; 2572 break; 2573 default: 2574 MPASS(0); 2575 } 2576 } else { 2577 fl->ifl_sds.ifsd_m[cidx] = NULL; 2578 *pf_rv = PFIL_PASS; 2579 } 2580 2581 if (unload) 2582 bus_dmamap_unload(fl->ifl_buf_tag, map); 2583 fl->ifl_cidx = (fl->ifl_cidx + 1) & (fl->ifl_size-1); 2584 if (__predict_false(fl->ifl_cidx == 0)) 2585 fl->ifl_gen = 0; 2586 bit_clear(fl->ifl_rx_bitmap, cidx); 2587 return (m); 2588 } 2589 2590 static struct mbuf * 2591 assemble_segments(iflib_rxq_t rxq, if_rxd_info_t ri, if_rxsd_t sd, int *pf_rv) 2592 { 2593 struct mbuf *m, *mh, *mt; 2594 caddr_t cl; 2595 int *pf_rv_ptr, flags, i, padlen; 2596 bool consumed; 2597 2598 i = 0; 2599 mh = NULL; 2600 consumed = false; 2601 *pf_rv = PFIL_PASS; 2602 pf_rv_ptr = pf_rv; 2603 do { 2604 m = rxd_frag_to_sd(rxq, &ri->iri_frags[i], !consumed, sd, 2605 pf_rv_ptr, ri); 2606 2607 MPASS(*sd->ifsd_cl != NULL); 2608 2609 /* 2610 * Exclude zero-length frags & frags from 2611 * packets the filter has consumed or dropped 2612 */ 2613 if (ri->iri_frags[i].irf_len == 0 || consumed || 2614 *pf_rv == PFIL_CONSUMED || *pf_rv == PFIL_DROPPED) { 2615 if (mh == NULL) { 2616 /* everything saved here */ 2617 consumed = true; 2618 pf_rv_ptr = NULL; 2619 continue; 2620 } 2621 /* XXX we can save the cluster here, but not the mbuf */ 2622 m_init(m, M_NOWAIT, MT_DATA, 0); 2623 m_free(m); 2624 continue; 2625 } 2626 if (mh == NULL) { 2627 flags = M_PKTHDR|M_EXT; 2628 mh = mt = m; 2629 padlen = ri->iri_pad; 2630 } else { 2631 flags = M_EXT; 2632 mt->m_next = m; 2633 mt = m; 2634 /* assuming padding is only on the first fragment */ 2635 padlen = 0; 2636 } 2637 cl = *sd->ifsd_cl; 2638 *sd->ifsd_cl = NULL; 2639 2640 /* Can these two be made one ? */ 2641 m_init(m, M_NOWAIT, MT_DATA, flags); 2642 m_cljset(m, cl, sd->ifsd_fl->ifl_cltype); 2643 /* 2644 * These must follow m_init and m_cljset 2645 */ 2646 m->m_data += padlen; 2647 ri->iri_len -= padlen; 2648 m->m_len = ri->iri_frags[i].irf_len; 2649 } while (++i < ri->iri_nfrags); 2650 2651 return (mh); 2652 } 2653 2654 /* 2655 * Process one software descriptor 2656 */ 2657 static struct mbuf * 2658 iflib_rxd_pkt_get(iflib_rxq_t rxq, if_rxd_info_t ri) 2659 { 2660 struct if_rxsd sd; 2661 struct mbuf *m; 2662 int pf_rv; 2663 2664 /* should I merge this back in now that the two paths are basically duplicated? */ 2665 if (ri->iri_nfrags == 1 && 2666 ri->iri_frags[0].irf_len <= MIN(IFLIB_RX_COPY_THRESH, MHLEN)) { 2667 m = rxd_frag_to_sd(rxq, &ri->iri_frags[0], false, &sd, 2668 &pf_rv, ri); 2669 if (pf_rv != PFIL_PASS && pf_rv != PFIL_REALLOCED) 2670 return (m); 2671 if (pf_rv == PFIL_PASS) { 2672 m_init(m, M_NOWAIT, MT_DATA, M_PKTHDR); 2673 #ifndef __NO_STRICT_ALIGNMENT 2674 if (!IP_ALIGNED(m)) 2675 m->m_data += 2; 2676 #endif 2677 memcpy(m->m_data, *sd.ifsd_cl, ri->iri_len); 2678 m->m_len = ri->iri_frags[0].irf_len; 2679 } 2680 } else { 2681 m = assemble_segments(rxq, ri, &sd, &pf_rv); 2682 if (pf_rv != PFIL_PASS && pf_rv != PFIL_REALLOCED) 2683 return (m); 2684 } 2685 m->m_pkthdr.len = ri->iri_len; 2686 m->m_pkthdr.rcvif = ri->iri_ifp; 2687 m->m_flags |= ri->iri_flags; 2688 m->m_pkthdr.ether_vtag = ri->iri_vtag; 2689 m->m_pkthdr.flowid = ri->iri_flowid; 2690 M_HASHTYPE_SET(m, ri->iri_rsstype); 2691 m->m_pkthdr.csum_flags = ri->iri_csum_flags; 2692 m->m_pkthdr.csum_data = ri->iri_csum_data; 2693 return (m); 2694 } 2695 2696 #if defined(INET6) || defined(INET) 2697 static void 2698 iflib_get_ip_forwarding(struct lro_ctrl *lc, bool *v4, bool *v6) 2699 { 2700 CURVNET_SET(lc->ifp->if_vnet); 2701 #if defined(INET6) 2702 *v6 = V_ip6_forwarding; 2703 #endif 2704 #if defined(INET) 2705 *v4 = V_ipforwarding; 2706 #endif 2707 CURVNET_RESTORE(); 2708 } 2709 2710 /* 2711 * Returns true if it's possible this packet could be LROed. 2712 * if it returns false, it is guaranteed that tcp_lro_rx() 2713 * would not return zero. 2714 */ 2715 static bool 2716 iflib_check_lro_possible(struct mbuf *m, bool v4_forwarding, bool v6_forwarding) 2717 { 2718 struct ether_header *eh; 2719 2720 eh = mtod(m, struct ether_header *); 2721 switch (eh->ether_type) { 2722 #if defined(INET6) 2723 case htons(ETHERTYPE_IPV6): 2724 return (!v6_forwarding); 2725 #endif 2726 #if defined (INET) 2727 case htons(ETHERTYPE_IP): 2728 return (!v4_forwarding); 2729 #endif 2730 } 2731 2732 return false; 2733 } 2734 #else 2735 static void 2736 iflib_get_ip_forwarding(struct lro_ctrl *lc __unused, bool *v4 __unused, bool *v6 __unused) 2737 { 2738 } 2739 #endif 2740 2741 static bool 2742 iflib_rxeof(iflib_rxq_t rxq, qidx_t budget) 2743 { 2744 if_t ifp; 2745 if_ctx_t ctx = rxq->ifr_ctx; 2746 if_shared_ctx_t sctx = ctx->ifc_sctx; 2747 if_softc_ctx_t scctx = &ctx->ifc_softc_ctx; 2748 int avail, i; 2749 qidx_t *cidxp; 2750 struct if_rxd_info ri; 2751 int err, budget_left, rx_bytes, rx_pkts; 2752 iflib_fl_t fl; 2753 int lro_enabled; 2754 bool v4_forwarding, v6_forwarding, lro_possible; 2755 2756 /* 2757 * XXX early demux data packets so that if_input processing only handles 2758 * acks in interrupt context 2759 */ 2760 struct mbuf *m, *mh, *mt, *mf; 2761 2762 NET_EPOCH_ASSERT(); 2763 2764 lro_possible = v4_forwarding = v6_forwarding = false; 2765 ifp = ctx->ifc_ifp; 2766 mh = mt = NULL; 2767 MPASS(budget > 0); 2768 rx_pkts = rx_bytes = 0; 2769 if (sctx->isc_flags & IFLIB_HAS_RXCQ) 2770 cidxp = &rxq->ifr_cq_cidx; 2771 else 2772 cidxp = &rxq->ifr_fl[0].ifl_cidx; 2773 if ((avail = iflib_rxd_avail(ctx, rxq, *cidxp, budget)) == 0) { 2774 for (i = 0, fl = &rxq->ifr_fl[0]; i < sctx->isc_nfl; i++, fl++) 2775 __iflib_fl_refill_lt(ctx, fl, budget + 8); 2776 DBG_COUNTER_INC(rx_unavail); 2777 return (false); 2778 } 2779 2780 /* pfil needs the vnet to be set */ 2781 CURVNET_SET_QUIET(ifp->if_vnet); 2782 for (budget_left = budget; budget_left > 0 && avail > 0;) { 2783 if (__predict_false(!CTX_ACTIVE(ctx))) { 2784 DBG_COUNTER_INC(rx_ctx_inactive); 2785 break; 2786 } 2787 /* 2788 * Reset client set fields to their default values 2789 */ 2790 rxd_info_zero(&ri); 2791 ri.iri_qsidx = rxq->ifr_id; 2792 ri.iri_cidx = *cidxp; 2793 ri.iri_ifp = ifp; 2794 ri.iri_frags = rxq->ifr_frags; 2795 err = ctx->isc_rxd_pkt_get(ctx->ifc_softc, &ri); 2796 2797 if (err) 2798 goto err; 2799 rx_pkts += 1; 2800 rx_bytes += ri.iri_len; 2801 if (sctx->isc_flags & IFLIB_HAS_RXCQ) { 2802 *cidxp = ri.iri_cidx; 2803 /* Update our consumer index */ 2804 /* XXX NB: shurd - check if this is still safe */ 2805 while (rxq->ifr_cq_cidx >= scctx->isc_nrxd[0]) 2806 rxq->ifr_cq_cidx -= scctx->isc_nrxd[0]; 2807 /* was this only a completion queue message? */ 2808 if (__predict_false(ri.iri_nfrags == 0)) 2809 continue; 2810 } 2811 MPASS(ri.iri_nfrags != 0); 2812 MPASS(ri.iri_len != 0); 2813 2814 /* will advance the cidx on the corresponding free lists */ 2815 m = iflib_rxd_pkt_get(rxq, &ri); 2816 avail--; 2817 budget_left--; 2818 if (avail == 0 && budget_left) 2819 avail = iflib_rxd_avail(ctx, rxq, *cidxp, budget_left); 2820 2821 if (__predict_false(m == NULL)) 2822 continue; 2823 2824 /* imm_pkt: -- cxgb */ 2825 if (mh == NULL) 2826 mh = mt = m; 2827 else { 2828 mt->m_nextpkt = m; 2829 mt = m; 2830 } 2831 } 2832 CURVNET_RESTORE(); 2833 /* make sure that we can refill faster than drain */ 2834 for (i = 0, fl = &rxq->ifr_fl[0]; i < sctx->isc_nfl; i++, fl++) 2835 __iflib_fl_refill_lt(ctx, fl, budget + 8); 2836 2837 lro_enabled = (if_getcapenable(ifp) & IFCAP_LRO); 2838 if (lro_enabled) 2839 iflib_get_ip_forwarding(&rxq->ifr_lc, &v4_forwarding, &v6_forwarding); 2840 mt = mf = NULL; 2841 while (mh != NULL) { 2842 m = mh; 2843 mh = mh->m_nextpkt; 2844 m->m_nextpkt = NULL; 2845 #ifndef __NO_STRICT_ALIGNMENT 2846 if (!IP_ALIGNED(m) && (m = iflib_fixup_rx(m)) == NULL) 2847 continue; 2848 #endif 2849 rx_bytes += m->m_pkthdr.len; 2850 rx_pkts++; 2851 #if defined(INET6) || defined(INET) 2852 if (lro_enabled) { 2853 if (!lro_possible) { 2854 lro_possible = iflib_check_lro_possible(m, v4_forwarding, v6_forwarding); 2855 if (lro_possible && mf != NULL) { 2856 ifp->if_input(ifp, mf); 2857 DBG_COUNTER_INC(rx_if_input); 2858 mt = mf = NULL; 2859 } 2860 } 2861 if ((m->m_pkthdr.csum_flags & (CSUM_L4_CALC|CSUM_L4_VALID)) == 2862 (CSUM_L4_CALC|CSUM_L4_VALID)) { 2863 if (lro_possible && tcp_lro_rx(&rxq->ifr_lc, m, 0) == 0) 2864 continue; 2865 } 2866 } 2867 #endif 2868 if (lro_possible) { 2869 ifp->if_input(ifp, m); 2870 DBG_COUNTER_INC(rx_if_input); 2871 continue; 2872 } 2873 2874 if (mf == NULL) 2875 mf = m; 2876 if (mt != NULL) 2877 mt->m_nextpkt = m; 2878 mt = m; 2879 } 2880 if (mf != NULL) { 2881 ifp->if_input(ifp, mf); 2882 DBG_COUNTER_INC(rx_if_input); 2883 } 2884 2885 if_inc_counter(ifp, IFCOUNTER_IBYTES, rx_bytes); 2886 if_inc_counter(ifp, IFCOUNTER_IPACKETS, rx_pkts); 2887 2888 /* 2889 * Flush any outstanding LRO work 2890 */ 2891 #if defined(INET6) || defined(INET) 2892 tcp_lro_flush_all(&rxq->ifr_lc); 2893 #endif 2894 if (avail) 2895 return true; 2896 return (iflib_rxd_avail(ctx, rxq, *cidxp, 1)); 2897 err: 2898 STATE_LOCK(ctx); 2899 ctx->ifc_flags |= IFC_DO_RESET; 2900 iflib_admin_intr_deferred(ctx); 2901 STATE_UNLOCK(ctx); 2902 return (false); 2903 } 2904 2905 #define TXD_NOTIFY_COUNT(txq) (((txq)->ift_size / (txq)->ift_update_freq)-1) 2906 static inline qidx_t 2907 txq_max_db_deferred(iflib_txq_t txq, qidx_t in_use) 2908 { 2909 qidx_t notify_count = TXD_NOTIFY_COUNT(txq); 2910 qidx_t minthresh = txq->ift_size / 8; 2911 if (in_use > 4*minthresh) 2912 return (notify_count); 2913 if (in_use > 2*minthresh) 2914 return (notify_count >> 1); 2915 if (in_use > minthresh) 2916 return (notify_count >> 3); 2917 return (0); 2918 } 2919 2920 static inline qidx_t 2921 txq_max_rs_deferred(iflib_txq_t txq) 2922 { 2923 qidx_t notify_count = TXD_NOTIFY_COUNT(txq); 2924 qidx_t minthresh = txq->ift_size / 8; 2925 if (txq->ift_in_use > 4*minthresh) 2926 return (notify_count); 2927 if (txq->ift_in_use > 2*minthresh) 2928 return (notify_count >> 1); 2929 if (txq->ift_in_use > minthresh) 2930 return (notify_count >> 2); 2931 return (2); 2932 } 2933 2934 #define M_CSUM_FLAGS(m) ((m)->m_pkthdr.csum_flags) 2935 #define M_HAS_VLANTAG(m) (m->m_flags & M_VLANTAG) 2936 2937 #define TXQ_MAX_DB_DEFERRED(txq, in_use) txq_max_db_deferred((txq), (in_use)) 2938 #define TXQ_MAX_RS_DEFERRED(txq) txq_max_rs_deferred(txq) 2939 #define TXQ_MAX_DB_CONSUMED(size) (size >> 4) 2940 2941 /* forward compatibility for cxgb */ 2942 #define FIRST_QSET(ctx) 0 2943 #define NTXQSETS(ctx) ((ctx)->ifc_softc_ctx.isc_ntxqsets) 2944 #define NRXQSETS(ctx) ((ctx)->ifc_softc_ctx.isc_nrxqsets) 2945 #define QIDX(ctx, m) ((((m)->m_pkthdr.flowid & ctx->ifc_softc_ctx.isc_rss_table_mask) % NTXQSETS(ctx)) + FIRST_QSET(ctx)) 2946 #define DESC_RECLAIMABLE(q) ((int)((q)->ift_processed - (q)->ift_cleaned - (q)->ift_ctx->ifc_softc_ctx.isc_tx_nsegments)) 2947 2948 /* XXX we should be setting this to something other than zero */ 2949 #define RECLAIM_THRESH(ctx) ((ctx)->ifc_sctx->isc_tx_reclaim_thresh) 2950 #define MAX_TX_DESC(ctx) max((ctx)->ifc_softc_ctx.isc_tx_tso_segments_max, \ 2951 (ctx)->ifc_softc_ctx.isc_tx_nsegments) 2952 2953 static inline bool 2954 iflib_txd_db_check(if_ctx_t ctx, iflib_txq_t txq, int ring, qidx_t in_use) 2955 { 2956 qidx_t dbval, max; 2957 bool rang; 2958 2959 rang = false; 2960 max = TXQ_MAX_DB_DEFERRED(txq, in_use); 2961 if (ring || txq->ift_db_pending >= max) { 2962 dbval = txq->ift_npending ? txq->ift_npending : txq->ift_pidx; 2963 bus_dmamap_sync(txq->ift_ifdi->idi_tag, txq->ift_ifdi->idi_map, 2964 BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); 2965 ctx->isc_txd_flush(ctx->ifc_softc, txq->ift_id, dbval); 2966 txq->ift_db_pending = txq->ift_npending = 0; 2967 rang = true; 2968 } 2969 return (rang); 2970 } 2971 2972 #ifdef PKT_DEBUG 2973 static void 2974 print_pkt(if_pkt_info_t pi) 2975 { 2976 printf("pi len: %d qsidx: %d nsegs: %d ndescs: %d flags: %x pidx: %d\n", 2977 pi->ipi_len, pi->ipi_qsidx, pi->ipi_nsegs, pi->ipi_ndescs, pi->ipi_flags, pi->ipi_pidx); 2978 printf("pi new_pidx: %d csum_flags: %lx tso_segsz: %d mflags: %x vtag: %d\n", 2979 pi->ipi_new_pidx, pi->ipi_csum_flags, pi->ipi_tso_segsz, pi->ipi_mflags, pi->ipi_vtag); 2980 printf("pi etype: %d ehdrlen: %d ip_hlen: %d ipproto: %d\n", 2981 pi->ipi_etype, pi->ipi_ehdrlen, pi->ipi_ip_hlen, pi->ipi_ipproto); 2982 } 2983 #endif 2984 2985 #define IS_TSO4(pi) ((pi)->ipi_csum_flags & CSUM_IP_TSO) 2986 #define IS_TX_OFFLOAD4(pi) ((pi)->ipi_csum_flags & (CSUM_IP_TCP | CSUM_IP_TSO)) 2987 #define IS_TSO6(pi) ((pi)->ipi_csum_flags & CSUM_IP6_TSO) 2988 #define IS_TX_OFFLOAD6(pi) ((pi)->ipi_csum_flags & (CSUM_IP6_TCP | CSUM_IP6_TSO)) 2989 2990 static int 2991 iflib_parse_header(iflib_txq_t txq, if_pkt_info_t pi, struct mbuf **mp) 2992 { 2993 if_shared_ctx_t sctx = txq->ift_ctx->ifc_sctx; 2994 struct ether_vlan_header *eh; 2995 struct mbuf *m; 2996 2997 m = *mp; 2998 if ((sctx->isc_flags & IFLIB_NEED_SCRATCH) && 2999 M_WRITABLE(m) == 0) { 3000 if ((m = m_dup(m, M_NOWAIT)) == NULL) { 3001 return (ENOMEM); 3002 } else { 3003 m_freem(*mp); 3004 DBG_COUNTER_INC(tx_frees); 3005 *mp = m; 3006 } 3007 } 3008 3009 /* 3010 * Determine where frame payload starts. 3011 * Jump over vlan headers if already present, 3012 * helpful for QinQ too. 3013 */ 3014 if (__predict_false(m->m_len < sizeof(*eh))) { 3015 txq->ift_pullups++; 3016 if (__predict_false((m = m_pullup(m, sizeof(*eh))) == NULL)) 3017 return (ENOMEM); 3018 } 3019 eh = mtod(m, struct ether_vlan_header *); 3020 if (eh->evl_encap_proto == htons(ETHERTYPE_VLAN)) { 3021 pi->ipi_etype = ntohs(eh->evl_proto); 3022 pi->ipi_ehdrlen = ETHER_HDR_LEN + ETHER_VLAN_ENCAP_LEN; 3023 } else { 3024 pi->ipi_etype = ntohs(eh->evl_encap_proto); 3025 pi->ipi_ehdrlen = ETHER_HDR_LEN; 3026 } 3027 3028 switch (pi->ipi_etype) { 3029 #ifdef INET 3030 case ETHERTYPE_IP: 3031 { 3032 struct mbuf *n; 3033 struct ip *ip = NULL; 3034 struct tcphdr *th = NULL; 3035 int minthlen; 3036 3037 minthlen = min(m->m_pkthdr.len, pi->ipi_ehdrlen + sizeof(*ip) + sizeof(*th)); 3038 if (__predict_false(m->m_len < minthlen)) { 3039 /* 3040 * if this code bloat is causing too much of a hit 3041 * move it to a separate function and mark it noinline 3042 */ 3043 if (m->m_len == pi->ipi_ehdrlen) { 3044 n = m->m_next; 3045 MPASS(n); 3046 if (n->m_len >= sizeof(*ip)) { 3047 ip = (struct ip *)n->m_data; 3048 if (n->m_len >= (ip->ip_hl << 2) + sizeof(*th)) 3049 th = (struct tcphdr *)((caddr_t)ip + (ip->ip_hl << 2)); 3050 } else { 3051 txq->ift_pullups++; 3052 if (__predict_false((m = m_pullup(m, minthlen)) == NULL)) 3053 return (ENOMEM); 3054 ip = (struct ip *)(m->m_data + pi->ipi_ehdrlen); 3055 } 3056 } else { 3057 txq->ift_pullups++; 3058 if (__predict_false((m = m_pullup(m, minthlen)) == NULL)) 3059 return (ENOMEM); 3060 ip = (struct ip *)(m->m_data + pi->ipi_ehdrlen); 3061 if (m->m_len >= (ip->ip_hl << 2) + sizeof(*th)) 3062 th = (struct tcphdr *)((caddr_t)ip + (ip->ip_hl << 2)); 3063 } 3064 } else { 3065 ip = (struct ip *)(m->m_data + pi->ipi_ehdrlen); 3066 if (m->m_len >= (ip->ip_hl << 2) + sizeof(*th)) 3067 th = (struct tcphdr *)((caddr_t)ip + (ip->ip_hl << 2)); 3068 } 3069 pi->ipi_ip_hlen = ip->ip_hl << 2; 3070 pi->ipi_ipproto = ip->ip_p; 3071 pi->ipi_flags |= IPI_TX_IPV4; 3072 3073 /* TCP checksum offload may require TCP header length */ 3074 if (IS_TX_OFFLOAD4(pi)) { 3075 if (__predict_true(pi->ipi_ipproto == IPPROTO_TCP)) { 3076 if (__predict_false(th == NULL)) { 3077 txq->ift_pullups++; 3078 if (__predict_false((m = m_pullup(m, (ip->ip_hl << 2) + sizeof(*th))) == NULL)) 3079 return (ENOMEM); 3080 th = (struct tcphdr *)((caddr_t)ip + pi->ipi_ip_hlen); 3081 } 3082 pi->ipi_tcp_hflags = th->th_flags; 3083 pi->ipi_tcp_hlen = th->th_off << 2; 3084 pi->ipi_tcp_seq = th->th_seq; 3085 } 3086 if (IS_TSO4(pi)) { 3087 if (__predict_false(ip->ip_p != IPPROTO_TCP)) 3088 return (ENXIO); 3089 /* 3090 * TSO always requires hardware checksum offload. 3091 */ 3092 pi->ipi_csum_flags |= (CSUM_IP_TCP | CSUM_IP); 3093 th->th_sum = in_pseudo(ip->ip_src.s_addr, 3094 ip->ip_dst.s_addr, htons(IPPROTO_TCP)); 3095 pi->ipi_tso_segsz = m->m_pkthdr.tso_segsz; 3096 if (sctx->isc_flags & IFLIB_TSO_INIT_IP) { 3097 ip->ip_sum = 0; 3098 ip->ip_len = htons(pi->ipi_ip_hlen + pi->ipi_tcp_hlen + pi->ipi_tso_segsz); 3099 } 3100 } 3101 } 3102 if ((sctx->isc_flags & IFLIB_NEED_ZERO_CSUM) && (pi->ipi_csum_flags & CSUM_IP)) 3103 ip->ip_sum = 0; 3104 3105 break; 3106 } 3107 #endif 3108 #ifdef INET6 3109 case ETHERTYPE_IPV6: 3110 { 3111 struct ip6_hdr *ip6 = (struct ip6_hdr *)(m->m_data + pi->ipi_ehdrlen); 3112 struct tcphdr *th; 3113 pi->ipi_ip_hlen = sizeof(struct ip6_hdr); 3114 3115 if (__predict_false(m->m_len < pi->ipi_ehdrlen + sizeof(struct ip6_hdr))) { 3116 txq->ift_pullups++; 3117 if (__predict_false((m = m_pullup(m, pi->ipi_ehdrlen + sizeof(struct ip6_hdr))) == NULL)) 3118 return (ENOMEM); 3119 } 3120 th = (struct tcphdr *)((caddr_t)ip6 + pi->ipi_ip_hlen); 3121 3122 /* XXX-BZ this will go badly in case of ext hdrs. */ 3123 pi->ipi_ipproto = ip6->ip6_nxt; 3124 pi->ipi_flags |= IPI_TX_IPV6; 3125 3126 /* TCP checksum offload may require TCP header length */ 3127 if (IS_TX_OFFLOAD6(pi)) { 3128 if (pi->ipi_ipproto == IPPROTO_TCP) { 3129 if (__predict_false(m->m_len < pi->ipi_ehdrlen + sizeof(struct ip6_hdr) + sizeof(struct tcphdr))) { 3130 txq->ift_pullups++; 3131 if (__predict_false((m = m_pullup(m, pi->ipi_ehdrlen + sizeof(struct ip6_hdr) + sizeof(struct tcphdr))) == NULL)) 3132 return (ENOMEM); 3133 } 3134 pi->ipi_tcp_hflags = th->th_flags; 3135 pi->ipi_tcp_hlen = th->th_off << 2; 3136 pi->ipi_tcp_seq = th->th_seq; 3137 } 3138 if (IS_TSO6(pi)) { 3139 if (__predict_false(ip6->ip6_nxt != IPPROTO_TCP)) 3140 return (ENXIO); 3141 /* 3142 * TSO always requires hardware checksum offload. 3143 */ 3144 pi->ipi_csum_flags |= CSUM_IP6_TCP; 3145 th->th_sum = in6_cksum_pseudo(ip6, 0, IPPROTO_TCP, 0); 3146 pi->ipi_tso_segsz = m->m_pkthdr.tso_segsz; 3147 } 3148 } 3149 break; 3150 } 3151 #endif 3152 default: 3153 pi->ipi_csum_flags &= ~CSUM_OFFLOAD; 3154 pi->ipi_ip_hlen = 0; 3155 break; 3156 } 3157 *mp = m; 3158 3159 return (0); 3160 } 3161 3162 /* 3163 * If dodgy hardware rejects the scatter gather chain we've handed it 3164 * we'll need to remove the mbuf chain from ifsg_m[] before we can add the 3165 * m_defrag'd mbufs 3166 */ 3167 static __noinline struct mbuf * 3168 iflib_remove_mbuf(iflib_txq_t txq) 3169 { 3170 int ntxd, pidx; 3171 struct mbuf *m, **ifsd_m; 3172 3173 ifsd_m = txq->ift_sds.ifsd_m; 3174 ntxd = txq->ift_size; 3175 pidx = txq->ift_pidx & (ntxd - 1); 3176 ifsd_m = txq->ift_sds.ifsd_m; 3177 m = ifsd_m[pidx]; 3178 ifsd_m[pidx] = NULL; 3179 bus_dmamap_unload(txq->ift_buf_tag, txq->ift_sds.ifsd_map[pidx]); 3180 if (txq->ift_sds.ifsd_tso_map != NULL) 3181 bus_dmamap_unload(txq->ift_tso_buf_tag, 3182 txq->ift_sds.ifsd_tso_map[pidx]); 3183 #if MEMORY_LOGGING 3184 txq->ift_dequeued++; 3185 #endif 3186 return (m); 3187 } 3188 3189 static inline caddr_t 3190 calc_next_txd(iflib_txq_t txq, int cidx, uint8_t qid) 3191 { 3192 qidx_t size; 3193 int ntxd; 3194 caddr_t start, end, cur, next; 3195 3196 ntxd = txq->ift_size; 3197 size = txq->ift_txd_size[qid]; 3198 start = txq->ift_ifdi[qid].idi_vaddr; 3199 3200 if (__predict_false(size == 0)) 3201 return (start); 3202 cur = start + size*cidx; 3203 end = start + size*ntxd; 3204 next = CACHE_PTR_NEXT(cur); 3205 return (next < end ? next : start); 3206 } 3207 3208 /* 3209 * Pad an mbuf to ensure a minimum ethernet frame size. 3210 * min_frame_size is the frame size (less CRC) to pad the mbuf to 3211 */ 3212 static __noinline int 3213 iflib_ether_pad(device_t dev, struct mbuf **m_head, uint16_t min_frame_size) 3214 { 3215 /* 3216 * 18 is enough bytes to pad an ARP packet to 46 bytes, and 3217 * and ARP message is the smallest common payload I can think of 3218 */ 3219 static char pad[18]; /* just zeros */ 3220 int n; 3221 struct mbuf *new_head; 3222 3223 if (!M_WRITABLE(*m_head)) { 3224 new_head = m_dup(*m_head, M_NOWAIT); 3225 if (new_head == NULL) { 3226 m_freem(*m_head); 3227 device_printf(dev, "cannot pad short frame, m_dup() failed"); 3228 DBG_COUNTER_INC(encap_pad_mbuf_fail); 3229 DBG_COUNTER_INC(tx_frees); 3230 return ENOMEM; 3231 } 3232 m_freem(*m_head); 3233 *m_head = new_head; 3234 } 3235 3236 for (n = min_frame_size - (*m_head)->m_pkthdr.len; 3237 n > 0; n -= sizeof(pad)) 3238 if (!m_append(*m_head, min(n, sizeof(pad)), pad)) 3239 break; 3240 3241 if (n > 0) { 3242 m_freem(*m_head); 3243 device_printf(dev, "cannot pad short frame\n"); 3244 DBG_COUNTER_INC(encap_pad_mbuf_fail); 3245 DBG_COUNTER_INC(tx_frees); 3246 return (ENOBUFS); 3247 } 3248 3249 return 0; 3250 } 3251 3252 static int 3253 iflib_encap(iflib_txq_t txq, struct mbuf **m_headp) 3254 { 3255 if_ctx_t ctx; 3256 if_shared_ctx_t sctx; 3257 if_softc_ctx_t scctx; 3258 bus_dma_tag_t buf_tag; 3259 bus_dma_segment_t *segs; 3260 struct mbuf *m_head, **ifsd_m; 3261 void *next_txd; 3262 bus_dmamap_t map; 3263 struct if_pkt_info pi; 3264 int remap = 0; 3265 int err, nsegs, ndesc, max_segs, pidx, cidx, next, ntxd; 3266 3267 ctx = txq->ift_ctx; 3268 sctx = ctx->ifc_sctx; 3269 scctx = &ctx->ifc_softc_ctx; 3270 segs = txq->ift_segs; 3271 ntxd = txq->ift_size; 3272 m_head = *m_headp; 3273 map = NULL; 3274 3275 /* 3276 * If we're doing TSO the next descriptor to clean may be quite far ahead 3277 */ 3278 cidx = txq->ift_cidx; 3279 pidx = txq->ift_pidx; 3280 if (ctx->ifc_flags & IFC_PREFETCH) { 3281 next = (cidx + CACHE_PTR_INCREMENT) & (ntxd-1); 3282 if (!(ctx->ifc_flags & IFLIB_HAS_TXCQ)) { 3283 next_txd = calc_next_txd(txq, cidx, 0); 3284 prefetch(next_txd); 3285 } 3286 3287 /* prefetch the next cache line of mbuf pointers and flags */ 3288 prefetch(&txq->ift_sds.ifsd_m[next]); 3289 prefetch(&txq->ift_sds.ifsd_map[next]); 3290 next = (cidx + CACHE_LINE_SIZE) & (ntxd-1); 3291 } 3292 map = txq->ift_sds.ifsd_map[pidx]; 3293 ifsd_m = txq->ift_sds.ifsd_m; 3294 3295 if (m_head->m_pkthdr.csum_flags & CSUM_TSO) { 3296 buf_tag = txq->ift_tso_buf_tag; 3297 max_segs = scctx->isc_tx_tso_segments_max; 3298 map = txq->ift_sds.ifsd_tso_map[pidx]; 3299 MPASS(buf_tag != NULL); 3300 MPASS(max_segs > 0); 3301 } else { 3302 buf_tag = txq->ift_buf_tag; 3303 max_segs = scctx->isc_tx_nsegments; 3304 map = txq->ift_sds.ifsd_map[pidx]; 3305 } 3306 if ((sctx->isc_flags & IFLIB_NEED_ETHER_PAD) && 3307 __predict_false(m_head->m_pkthdr.len < scctx->isc_min_frame_size)) { 3308 err = iflib_ether_pad(ctx->ifc_dev, m_headp, scctx->isc_min_frame_size); 3309 if (err) { 3310 DBG_COUNTER_INC(encap_txd_encap_fail); 3311 return err; 3312 } 3313 } 3314 m_head = *m_headp; 3315 3316 pkt_info_zero(&pi); 3317 pi.ipi_mflags = (m_head->m_flags & (M_VLANTAG|M_BCAST|M_MCAST)); 3318 pi.ipi_pidx = pidx; 3319 pi.ipi_qsidx = txq->ift_id; 3320 pi.ipi_len = m_head->m_pkthdr.len; 3321 pi.ipi_csum_flags = m_head->m_pkthdr.csum_flags; 3322 pi.ipi_vtag = M_HAS_VLANTAG(m_head) ? m_head->m_pkthdr.ether_vtag : 0; 3323 3324 /* deliberate bitwise OR to make one condition */ 3325 if (__predict_true((pi.ipi_csum_flags | pi.ipi_vtag))) { 3326 if (__predict_false((err = iflib_parse_header(txq, &pi, m_headp)) != 0)) { 3327 DBG_COUNTER_INC(encap_txd_encap_fail); 3328 return (err); 3329 } 3330 m_head = *m_headp; 3331 } 3332 3333 retry: 3334 err = bus_dmamap_load_mbuf_sg(buf_tag, map, m_head, segs, &nsegs, 3335 BUS_DMA_NOWAIT); 3336 defrag: 3337 if (__predict_false(err)) { 3338 switch (err) { 3339 case EFBIG: 3340 /* try collapse once and defrag once */ 3341 if (remap == 0) { 3342 m_head = m_collapse(*m_headp, M_NOWAIT, max_segs); 3343 /* try defrag if collapsing fails */ 3344 if (m_head == NULL) 3345 remap++; 3346 } 3347 if (remap == 1) { 3348 txq->ift_mbuf_defrag++; 3349 m_head = m_defrag(*m_headp, M_NOWAIT); 3350 } 3351 /* 3352 * remap should never be >1 unless bus_dmamap_load_mbuf_sg 3353 * failed to map an mbuf that was run through m_defrag 3354 */ 3355 MPASS(remap <= 1); 3356 if (__predict_false(m_head == NULL || remap > 1)) 3357 goto defrag_failed; 3358 remap++; 3359 *m_headp = m_head; 3360 goto retry; 3361 break; 3362 case ENOMEM: 3363 txq->ift_no_tx_dma_setup++; 3364 break; 3365 default: 3366 txq->ift_no_tx_dma_setup++; 3367 m_freem(*m_headp); 3368 DBG_COUNTER_INC(tx_frees); 3369 *m_headp = NULL; 3370 break; 3371 } 3372 txq->ift_map_failed++; 3373 DBG_COUNTER_INC(encap_load_mbuf_fail); 3374 DBG_COUNTER_INC(encap_txd_encap_fail); 3375 return (err); 3376 } 3377 ifsd_m[pidx] = m_head; 3378 /* 3379 * XXX assumes a 1 to 1 relationship between segments and 3380 * descriptors - this does not hold true on all drivers, e.g. 3381 * cxgb 3382 */ 3383 if (__predict_false(nsegs + 2 > TXQ_AVAIL(txq))) { 3384 txq->ift_no_desc_avail++; 3385 bus_dmamap_unload(buf_tag, map); 3386 DBG_COUNTER_INC(encap_txq_avail_fail); 3387 DBG_COUNTER_INC(encap_txd_encap_fail); 3388 if ((txq->ift_task.gt_task.ta_flags & TASK_ENQUEUED) == 0) 3389 GROUPTASK_ENQUEUE(&txq->ift_task); 3390 return (ENOBUFS); 3391 } 3392 /* 3393 * On Intel cards we can greatly reduce the number of TX interrupts 3394 * we see by only setting report status on every Nth descriptor. 3395 * However, this also means that the driver will need to keep track 3396 * of the descriptors that RS was set on to check them for the DD bit. 3397 */ 3398 txq->ift_rs_pending += nsegs + 1; 3399 if (txq->ift_rs_pending > TXQ_MAX_RS_DEFERRED(txq) || 3400 iflib_no_tx_batch || (TXQ_AVAIL(txq) - nsegs) <= MAX_TX_DESC(ctx) + 2) { 3401 pi.ipi_flags |= IPI_TX_INTR; 3402 txq->ift_rs_pending = 0; 3403 } 3404 3405 pi.ipi_segs = segs; 3406 pi.ipi_nsegs = nsegs; 3407 3408 MPASS(pidx >= 0 && pidx < txq->ift_size); 3409 #ifdef PKT_DEBUG 3410 print_pkt(&pi); 3411 #endif 3412 if ((err = ctx->isc_txd_encap(ctx->ifc_softc, &pi)) == 0) { 3413 bus_dmamap_sync(buf_tag, map, BUS_DMASYNC_PREWRITE); 3414 DBG_COUNTER_INC(tx_encap); 3415 MPASS(pi.ipi_new_pidx < txq->ift_size); 3416 3417 ndesc = pi.ipi_new_pidx - pi.ipi_pidx; 3418 if (pi.ipi_new_pidx < pi.ipi_pidx) { 3419 ndesc += txq->ift_size; 3420 txq->ift_gen = 1; 3421 } 3422 /* 3423 * drivers can need as many as 3424 * two sentinels 3425 */ 3426 MPASS(ndesc <= pi.ipi_nsegs + 2); 3427 MPASS(pi.ipi_new_pidx != pidx); 3428 MPASS(ndesc > 0); 3429 txq->ift_in_use += ndesc; 3430 3431 /* 3432 * We update the last software descriptor again here because there may 3433 * be a sentinel and/or there may be more mbufs than segments 3434 */ 3435 txq->ift_pidx = pi.ipi_new_pidx; 3436 txq->ift_npending += pi.ipi_ndescs; 3437 } else { 3438 *m_headp = m_head = iflib_remove_mbuf(txq); 3439 if (err == EFBIG) { 3440 txq->ift_txd_encap_efbig++; 3441 if (remap < 2) { 3442 remap = 1; 3443 goto defrag; 3444 } 3445 } 3446 goto defrag_failed; 3447 } 3448 /* 3449 * err can't possibly be non-zero here, so we don't neet to test it 3450 * to see if we need to DBG_COUNTER_INC(encap_txd_encap_fail). 3451 */ 3452 return (err); 3453 3454 defrag_failed: 3455 txq->ift_mbuf_defrag_failed++; 3456 txq->ift_map_failed++; 3457 m_freem(*m_headp); 3458 DBG_COUNTER_INC(tx_frees); 3459 *m_headp = NULL; 3460 DBG_COUNTER_INC(encap_txd_encap_fail); 3461 return (ENOMEM); 3462 } 3463 3464 static void 3465 iflib_tx_desc_free(iflib_txq_t txq, int n) 3466 { 3467 uint32_t qsize, cidx, mask, gen; 3468 struct mbuf *m, **ifsd_m; 3469 bool do_prefetch; 3470 3471 cidx = txq->ift_cidx; 3472 gen = txq->ift_gen; 3473 qsize = txq->ift_size; 3474 mask = qsize-1; 3475 ifsd_m = txq->ift_sds.ifsd_m; 3476 do_prefetch = (txq->ift_ctx->ifc_flags & IFC_PREFETCH); 3477 3478 while (n-- > 0) { 3479 if (do_prefetch) { 3480 prefetch(ifsd_m[(cidx + 3) & mask]); 3481 prefetch(ifsd_m[(cidx + 4) & mask]); 3482 } 3483 if ((m = ifsd_m[cidx]) != NULL) { 3484 prefetch(&ifsd_m[(cidx + CACHE_PTR_INCREMENT) & mask]); 3485 if (m->m_pkthdr.csum_flags & CSUM_TSO) { 3486 bus_dmamap_sync(txq->ift_tso_buf_tag, 3487 txq->ift_sds.ifsd_tso_map[cidx], 3488 BUS_DMASYNC_POSTWRITE); 3489 bus_dmamap_unload(txq->ift_tso_buf_tag, 3490 txq->ift_sds.ifsd_tso_map[cidx]); 3491 } else { 3492 bus_dmamap_sync(txq->ift_buf_tag, 3493 txq->ift_sds.ifsd_map[cidx], 3494 BUS_DMASYNC_POSTWRITE); 3495 bus_dmamap_unload(txq->ift_buf_tag, 3496 txq->ift_sds.ifsd_map[cidx]); 3497 } 3498 /* XXX we don't support any drivers that batch packets yet */ 3499 MPASS(m->m_nextpkt == NULL); 3500 m_freem(m); 3501 ifsd_m[cidx] = NULL; 3502 #if MEMORY_LOGGING 3503 txq->ift_dequeued++; 3504 #endif 3505 DBG_COUNTER_INC(tx_frees); 3506 } 3507 if (__predict_false(++cidx == qsize)) { 3508 cidx = 0; 3509 gen = 0; 3510 } 3511 } 3512 txq->ift_cidx = cidx; 3513 txq->ift_gen = gen; 3514 } 3515 3516 static __inline int 3517 iflib_completed_tx_reclaim(iflib_txq_t txq, int thresh) 3518 { 3519 int reclaim; 3520 if_ctx_t ctx = txq->ift_ctx; 3521 3522 KASSERT(thresh >= 0, ("invalid threshold to reclaim")); 3523 MPASS(thresh /*+ MAX_TX_DESC(txq->ift_ctx) */ < txq->ift_size); 3524 3525 /* 3526 * Need a rate-limiting check so that this isn't called every time 3527 */ 3528 iflib_tx_credits_update(ctx, txq); 3529 reclaim = DESC_RECLAIMABLE(txq); 3530 3531 if (reclaim <= thresh /* + MAX_TX_DESC(txq->ift_ctx) */) { 3532 #ifdef INVARIANTS 3533 if (iflib_verbose_debug) { 3534 printf("%s processed=%ju cleaned=%ju tx_nsegments=%d reclaim=%d thresh=%d\n", __FUNCTION__, 3535 txq->ift_processed, txq->ift_cleaned, txq->ift_ctx->ifc_softc_ctx.isc_tx_nsegments, 3536 reclaim, thresh); 3537 3538 } 3539 #endif 3540 return (0); 3541 } 3542 iflib_tx_desc_free(txq, reclaim); 3543 txq->ift_cleaned += reclaim; 3544 txq->ift_in_use -= reclaim; 3545 3546 return (reclaim); 3547 } 3548 3549 static struct mbuf ** 3550 _ring_peek_one(struct ifmp_ring *r, int cidx, int offset, int remaining) 3551 { 3552 int next, size; 3553 struct mbuf **items; 3554 3555 size = r->size; 3556 next = (cidx + CACHE_PTR_INCREMENT) & (size-1); 3557 items = __DEVOLATILE(struct mbuf **, &r->items[0]); 3558 3559 prefetch(items[(cidx + offset) & (size-1)]); 3560 if (remaining > 1) { 3561 prefetch2cachelines(&items[next]); 3562 prefetch2cachelines(items[(cidx + offset + 1) & (size-1)]); 3563 prefetch2cachelines(items[(cidx + offset + 2) & (size-1)]); 3564 prefetch2cachelines(items[(cidx + offset + 3) & (size-1)]); 3565 } 3566 return (__DEVOLATILE(struct mbuf **, &r->items[(cidx + offset) & (size-1)])); 3567 } 3568 3569 static void 3570 iflib_txq_check_drain(iflib_txq_t txq, int budget) 3571 { 3572 3573 ifmp_ring_check_drainage(txq->ift_br, budget); 3574 } 3575 3576 static uint32_t 3577 iflib_txq_can_drain(struct ifmp_ring *r) 3578 { 3579 iflib_txq_t txq = r->cookie; 3580 if_ctx_t ctx = txq->ift_ctx; 3581 3582 if (TXQ_AVAIL(txq) > MAX_TX_DESC(ctx) + 2) 3583 return (1); 3584 bus_dmamap_sync(txq->ift_ifdi->idi_tag, txq->ift_ifdi->idi_map, 3585 BUS_DMASYNC_POSTREAD); 3586 return (ctx->isc_txd_credits_update(ctx->ifc_softc, txq->ift_id, 3587 false)); 3588 } 3589 3590 static uint32_t 3591 iflib_txq_drain(struct ifmp_ring *r, uint32_t cidx, uint32_t pidx) 3592 { 3593 iflib_txq_t txq = r->cookie; 3594 if_ctx_t ctx = txq->ift_ctx; 3595 if_t ifp = ctx->ifc_ifp; 3596 struct mbuf *m, **mp; 3597 int avail, bytes_sent, consumed, count, err, i, in_use_prev; 3598 int mcast_sent, pkt_sent, reclaimed, txq_avail; 3599 bool do_prefetch, rang, ring; 3600 3601 if (__predict_false(!(if_getdrvflags(ifp) & IFF_DRV_RUNNING) || 3602 !LINK_ACTIVE(ctx))) { 3603 DBG_COUNTER_INC(txq_drain_notready); 3604 return (0); 3605 } 3606 reclaimed = iflib_completed_tx_reclaim(txq, RECLAIM_THRESH(ctx)); 3607 rang = iflib_txd_db_check(ctx, txq, reclaimed, txq->ift_in_use); 3608 avail = IDXDIFF(pidx, cidx, r->size); 3609 if (__predict_false(ctx->ifc_flags & IFC_QFLUSH)) { 3610 DBG_COUNTER_INC(txq_drain_flushing); 3611 for (i = 0; i < avail; i++) { 3612 if (__predict_true(r->items[(cidx + i) & (r->size-1)] != (void *)txq)) 3613 m_free(r->items[(cidx + i) & (r->size-1)]); 3614 r->items[(cidx + i) & (r->size-1)] = NULL; 3615 } 3616 return (avail); 3617 } 3618 3619 if (__predict_false(if_getdrvflags(ctx->ifc_ifp) & IFF_DRV_OACTIVE)) { 3620 txq->ift_qstatus = IFLIB_QUEUE_IDLE; 3621 CALLOUT_LOCK(txq); 3622 callout_stop(&txq->ift_timer); 3623 CALLOUT_UNLOCK(txq); 3624 DBG_COUNTER_INC(txq_drain_oactive); 3625 return (0); 3626 } 3627 if (reclaimed) 3628 txq->ift_qstatus = IFLIB_QUEUE_IDLE; 3629 consumed = mcast_sent = bytes_sent = pkt_sent = 0; 3630 count = MIN(avail, TX_BATCH_SIZE); 3631 #ifdef INVARIANTS 3632 if (iflib_verbose_debug) 3633 printf("%s avail=%d ifc_flags=%x txq_avail=%d ", __FUNCTION__, 3634 avail, ctx->ifc_flags, TXQ_AVAIL(txq)); 3635 #endif 3636 do_prefetch = (ctx->ifc_flags & IFC_PREFETCH); 3637 txq_avail = TXQ_AVAIL(txq); 3638 err = 0; 3639 for (i = 0; i < count && txq_avail > MAX_TX_DESC(ctx) + 2; i++) { 3640 int rem = do_prefetch ? count - i : 0; 3641 3642 mp = _ring_peek_one(r, cidx, i, rem); 3643 MPASS(mp != NULL && *mp != NULL); 3644 if (__predict_false(*mp == (struct mbuf *)txq)) { 3645 consumed++; 3646 continue; 3647 } 3648 in_use_prev = txq->ift_in_use; 3649 err = iflib_encap(txq, mp); 3650 if (__predict_false(err)) { 3651 /* no room - bail out */ 3652 if (err == ENOBUFS) 3653 break; 3654 consumed++; 3655 /* we can't send this packet - skip it */ 3656 continue; 3657 } 3658 consumed++; 3659 pkt_sent++; 3660 m = *mp; 3661 DBG_COUNTER_INC(tx_sent); 3662 bytes_sent += m->m_pkthdr.len; 3663 mcast_sent += !!(m->m_flags & M_MCAST); 3664 txq_avail = TXQ_AVAIL(txq); 3665 3666 txq->ift_db_pending += (txq->ift_in_use - in_use_prev); 3667 ETHER_BPF_MTAP(ifp, m); 3668 if (__predict_false(!(ifp->if_drv_flags & IFF_DRV_RUNNING))) 3669 break; 3670 rang = iflib_txd_db_check(ctx, txq, false, in_use_prev); 3671 } 3672 3673 /* deliberate use of bitwise or to avoid gratuitous short-circuit */ 3674 ring = rang ? false : (iflib_min_tx_latency | err) || (TXQ_AVAIL(txq) < MAX_TX_DESC(ctx)); 3675 iflib_txd_db_check(ctx, txq, ring, txq->ift_in_use); 3676 if_inc_counter(ifp, IFCOUNTER_OBYTES, bytes_sent); 3677 if_inc_counter(ifp, IFCOUNTER_OPACKETS, pkt_sent); 3678 if (mcast_sent) 3679 if_inc_counter(ifp, IFCOUNTER_OMCASTS, mcast_sent); 3680 #ifdef INVARIANTS 3681 if (iflib_verbose_debug) 3682 printf("consumed=%d\n", consumed); 3683 #endif 3684 return (consumed); 3685 } 3686 3687 static uint32_t 3688 iflib_txq_drain_always(struct ifmp_ring *r) 3689 { 3690 return (1); 3691 } 3692 3693 static uint32_t 3694 iflib_txq_drain_free(struct ifmp_ring *r, uint32_t cidx, uint32_t pidx) 3695 { 3696 int i, avail; 3697 struct mbuf **mp; 3698 iflib_txq_t txq; 3699 3700 txq = r->cookie; 3701 3702 txq->ift_qstatus = IFLIB_QUEUE_IDLE; 3703 CALLOUT_LOCK(txq); 3704 callout_stop(&txq->ift_timer); 3705 CALLOUT_UNLOCK(txq); 3706 3707 avail = IDXDIFF(pidx, cidx, r->size); 3708 for (i = 0; i < avail; i++) { 3709 mp = _ring_peek_one(r, cidx, i, avail - i); 3710 if (__predict_false(*mp == (struct mbuf *)txq)) 3711 continue; 3712 m_freem(*mp); 3713 DBG_COUNTER_INC(tx_frees); 3714 } 3715 MPASS(ifmp_ring_is_stalled(r) == 0); 3716 return (avail); 3717 } 3718 3719 static void 3720 iflib_ifmp_purge(iflib_txq_t txq) 3721 { 3722 struct ifmp_ring *r; 3723 3724 r = txq->ift_br; 3725 r->drain = iflib_txq_drain_free; 3726 r->can_drain = iflib_txq_drain_always; 3727 3728 ifmp_ring_check_drainage(r, r->size); 3729 3730 r->drain = iflib_txq_drain; 3731 r->can_drain = iflib_txq_can_drain; 3732 } 3733 3734 static void 3735 _task_fn_tx(void *context) 3736 { 3737 iflib_txq_t txq = context; 3738 if_ctx_t ctx = txq->ift_ctx; 3739 #if defined(ALTQ) || defined(DEV_NETMAP) 3740 if_t ifp = ctx->ifc_ifp; 3741 #endif 3742 int abdicate = ctx->ifc_sysctl_tx_abdicate; 3743 3744 #ifdef IFLIB_DIAGNOSTICS 3745 txq->ift_cpu_exec_count[curcpu]++; 3746 #endif 3747 if (!(if_getdrvflags(ctx->ifc_ifp) & IFF_DRV_RUNNING)) 3748 return; 3749 #ifdef DEV_NETMAP 3750 if (if_getcapenable(ifp) & IFCAP_NETMAP) { 3751 bus_dmamap_sync(txq->ift_ifdi->idi_tag, txq->ift_ifdi->idi_map, 3752 BUS_DMASYNC_POSTREAD); 3753 if (ctx->isc_txd_credits_update(ctx->ifc_softc, txq->ift_id, false)) 3754 netmap_tx_irq(ifp, txq->ift_id); 3755 if (ctx->ifc_flags & IFC_LEGACY) 3756 IFDI_INTR_ENABLE(ctx); 3757 else 3758 IFDI_TX_QUEUE_INTR_ENABLE(ctx, txq->ift_id); 3759 return; 3760 } 3761 #endif 3762 #ifdef ALTQ 3763 if (ALTQ_IS_ENABLED(&ifp->if_snd)) 3764 iflib_altq_if_start(ifp); 3765 #endif 3766 if (txq->ift_db_pending) 3767 ifmp_ring_enqueue(txq->ift_br, (void **)&txq, 1, TX_BATCH_SIZE, abdicate); 3768 else if (!abdicate) 3769 ifmp_ring_check_drainage(txq->ift_br, TX_BATCH_SIZE); 3770 /* 3771 * When abdicating, we always need to check drainage, not just when we don't enqueue 3772 */ 3773 if (abdicate) 3774 ifmp_ring_check_drainage(txq->ift_br, TX_BATCH_SIZE); 3775 if (ctx->ifc_flags & IFC_LEGACY) 3776 IFDI_INTR_ENABLE(ctx); 3777 else 3778 IFDI_TX_QUEUE_INTR_ENABLE(ctx, txq->ift_id); 3779 } 3780 3781 static void 3782 _task_fn_rx(void *context) 3783 { 3784 iflib_rxq_t rxq = context; 3785 if_ctx_t ctx = rxq->ifr_ctx; 3786 bool more; 3787 uint16_t budget; 3788 3789 #ifdef IFLIB_DIAGNOSTICS 3790 rxq->ifr_cpu_exec_count[curcpu]++; 3791 #endif 3792 DBG_COUNTER_INC(task_fn_rxs); 3793 if (__predict_false(!(if_getdrvflags(ctx->ifc_ifp) & IFF_DRV_RUNNING))) 3794 return; 3795 more = true; 3796 #ifdef DEV_NETMAP 3797 if (if_getcapenable(ctx->ifc_ifp) & IFCAP_NETMAP) { 3798 u_int work = 0; 3799 if (netmap_rx_irq(ctx->ifc_ifp, rxq->ifr_id, &work)) { 3800 more = false; 3801 } 3802 } 3803 #endif 3804 budget = ctx->ifc_sysctl_rx_budget; 3805 if (budget == 0) 3806 budget = 16; /* XXX */ 3807 if (more == false || (more = iflib_rxeof(rxq, budget)) == false) { 3808 if (ctx->ifc_flags & IFC_LEGACY) 3809 IFDI_INTR_ENABLE(ctx); 3810 else 3811 IFDI_RX_QUEUE_INTR_ENABLE(ctx, rxq->ifr_id); 3812 DBG_COUNTER_INC(rx_intr_enables); 3813 } 3814 if (__predict_false(!(if_getdrvflags(ctx->ifc_ifp) & IFF_DRV_RUNNING))) 3815 return; 3816 if (more) 3817 GROUPTASK_ENQUEUE(&rxq->ifr_task); 3818 } 3819 3820 static void 3821 _task_fn_admin(void *context) 3822 { 3823 if_ctx_t ctx = context; 3824 if_softc_ctx_t sctx = &ctx->ifc_softc_ctx; 3825 iflib_txq_t txq; 3826 int i; 3827 bool oactive, running, do_reset, do_watchdog, in_detach; 3828 uint32_t reset_on = hz / 2; 3829 3830 STATE_LOCK(ctx); 3831 running = (if_getdrvflags(ctx->ifc_ifp) & IFF_DRV_RUNNING); 3832 oactive = (if_getdrvflags(ctx->ifc_ifp) & IFF_DRV_OACTIVE); 3833 do_reset = (ctx->ifc_flags & IFC_DO_RESET); 3834 do_watchdog = (ctx->ifc_flags & IFC_DO_WATCHDOG); 3835 in_detach = (ctx->ifc_flags & IFC_IN_DETACH); 3836 ctx->ifc_flags &= ~(IFC_DO_RESET|IFC_DO_WATCHDOG); 3837 STATE_UNLOCK(ctx); 3838 3839 if ((!running && !oactive) && !(ctx->ifc_sctx->isc_flags & IFLIB_ADMIN_ALWAYS_RUN)) 3840 return; 3841 if (in_detach) 3842 return; 3843 3844 CTX_LOCK(ctx); 3845 for (txq = ctx->ifc_txqs, i = 0; i < sctx->isc_ntxqsets; i++, txq++) { 3846 CALLOUT_LOCK(txq); 3847 callout_stop(&txq->ift_timer); 3848 CALLOUT_UNLOCK(txq); 3849 } 3850 if (do_watchdog) { 3851 ctx->ifc_watchdog_events++; 3852 IFDI_WATCHDOG_RESET(ctx); 3853 } 3854 IFDI_UPDATE_ADMIN_STATUS(ctx); 3855 for (txq = ctx->ifc_txqs, i = 0; i < sctx->isc_ntxqsets; i++, txq++) { 3856 #ifdef DEV_NETMAP 3857 reset_on = hz / 2; 3858 if (if_getcapenable(ctx->ifc_ifp) & IFCAP_NETMAP) 3859 iflib_netmap_timer_adjust(ctx, txq, &reset_on); 3860 #endif 3861 callout_reset_on(&txq->ift_timer, reset_on, iflib_timer, txq, txq->ift_timer.c_cpu); 3862 } 3863 IFDI_LINK_INTR_ENABLE(ctx); 3864 if (do_reset) 3865 iflib_if_init_locked(ctx); 3866 CTX_UNLOCK(ctx); 3867 3868 if (LINK_ACTIVE(ctx) == 0) 3869 return; 3870 for (txq = ctx->ifc_txqs, i = 0; i < sctx->isc_ntxqsets; i++, txq++) 3871 iflib_txq_check_drain(txq, IFLIB_RESTART_BUDGET); 3872 } 3873 3874 3875 static void 3876 _task_fn_iov(void *context) 3877 { 3878 if_ctx_t ctx = context; 3879 3880 if (!(if_getdrvflags(ctx->ifc_ifp) & IFF_DRV_RUNNING) && 3881 !(ctx->ifc_sctx->isc_flags & IFLIB_ADMIN_ALWAYS_RUN)) 3882 return; 3883 3884 CTX_LOCK(ctx); 3885 IFDI_VFLR_HANDLE(ctx); 3886 CTX_UNLOCK(ctx); 3887 } 3888 3889 static int 3890 iflib_sysctl_int_delay(SYSCTL_HANDLER_ARGS) 3891 { 3892 int err; 3893 if_int_delay_info_t info; 3894 if_ctx_t ctx; 3895 3896 info = (if_int_delay_info_t)arg1; 3897 ctx = info->iidi_ctx; 3898 info->iidi_req = req; 3899 info->iidi_oidp = oidp; 3900 CTX_LOCK(ctx); 3901 err = IFDI_SYSCTL_INT_DELAY(ctx, info); 3902 CTX_UNLOCK(ctx); 3903 return (err); 3904 } 3905 3906 /********************************************************************* 3907 * 3908 * IFNET FUNCTIONS 3909 * 3910 **********************************************************************/ 3911 3912 static void 3913 iflib_if_init_locked(if_ctx_t ctx) 3914 { 3915 iflib_stop(ctx); 3916 iflib_init_locked(ctx); 3917 } 3918 3919 3920 static void 3921 iflib_if_init(void *arg) 3922 { 3923 if_ctx_t ctx = arg; 3924 3925 CTX_LOCK(ctx); 3926 iflib_if_init_locked(ctx); 3927 CTX_UNLOCK(ctx); 3928 } 3929 3930 static int 3931 iflib_if_transmit(if_t ifp, struct mbuf *m) 3932 { 3933 if_ctx_t ctx = if_getsoftc(ifp); 3934 3935 iflib_txq_t txq; 3936 int err, qidx; 3937 int abdicate = ctx->ifc_sysctl_tx_abdicate; 3938 3939 if (__predict_false((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0 || !LINK_ACTIVE(ctx))) { 3940 DBG_COUNTER_INC(tx_frees); 3941 m_freem(m); 3942 return (ENETDOWN); 3943 } 3944 3945 MPASS(m->m_nextpkt == NULL); 3946 /* ALTQ-enabled interfaces always use queue 0. */ 3947 qidx = 0; 3948 if ((NTXQSETS(ctx) > 1) && M_HASHTYPE_GET(m) && !ALTQ_IS_ENABLED(&ifp->if_snd)) 3949 qidx = QIDX(ctx, m); 3950 /* 3951 * XXX calculate buf_ring based on flowid (divvy up bits?) 3952 */ 3953 txq = &ctx->ifc_txqs[qidx]; 3954 3955 #ifdef DRIVER_BACKPRESSURE 3956 if (txq->ift_closed) { 3957 while (m != NULL) { 3958 next = m->m_nextpkt; 3959 m->m_nextpkt = NULL; 3960 m_freem(m); 3961 DBG_COUNTER_INC(tx_frees); 3962 m = next; 3963 } 3964 return (ENOBUFS); 3965 } 3966 #endif 3967 #ifdef notyet 3968 qidx = count = 0; 3969 mp = marr; 3970 next = m; 3971 do { 3972 count++; 3973 next = next->m_nextpkt; 3974 } while (next != NULL); 3975 3976 if (count > nitems(marr)) 3977 if ((mp = malloc(count*sizeof(struct mbuf *), M_IFLIB, M_NOWAIT)) == NULL) { 3978 /* XXX check nextpkt */ 3979 m_freem(m); 3980 /* XXX simplify for now */ 3981 DBG_COUNTER_INC(tx_frees); 3982 return (ENOBUFS); 3983 } 3984 for (next = m, i = 0; next != NULL; i++) { 3985 mp[i] = next; 3986 next = next->m_nextpkt; 3987 mp[i]->m_nextpkt = NULL; 3988 } 3989 #endif 3990 DBG_COUNTER_INC(tx_seen); 3991 err = ifmp_ring_enqueue(txq->ift_br, (void **)&m, 1, TX_BATCH_SIZE, abdicate); 3992 3993 if (abdicate) 3994 GROUPTASK_ENQUEUE(&txq->ift_task); 3995 if (err) { 3996 if (!abdicate) 3997 GROUPTASK_ENQUEUE(&txq->ift_task); 3998 /* support forthcoming later */ 3999 #ifdef DRIVER_BACKPRESSURE 4000 txq->ift_closed = TRUE; 4001 #endif 4002 ifmp_ring_check_drainage(txq->ift_br, TX_BATCH_SIZE); 4003 m_freem(m); 4004 DBG_COUNTER_INC(tx_frees); 4005 } 4006 4007 return (err); 4008 } 4009 4010 #ifdef ALTQ 4011 /* 4012 * The overall approach to integrating iflib with ALTQ is to continue to use 4013 * the iflib mp_ring machinery between the ALTQ queue(s) and the hardware 4014 * ring. Technically, when using ALTQ, queueing to an intermediate mp_ring 4015 * is redundant/unnecessary, but doing so minimizes the amount of 4016 * ALTQ-specific code required in iflib. It is assumed that the overhead of 4017 * redundantly queueing to an intermediate mp_ring is swamped by the 4018 * performance limitations inherent in using ALTQ. 4019 * 4020 * When ALTQ support is compiled in, all iflib drivers will use a transmit 4021 * routine, iflib_altq_if_transmit(), that checks if ALTQ is enabled for the 4022 * given interface. If ALTQ is enabled for an interface, then all 4023 * transmitted packets for that interface will be submitted to the ALTQ 4024 * subsystem via IFQ_ENQUEUE(). We don't use the legacy if_transmit() 4025 * implementation because it uses IFQ_HANDOFF(), which will duplicatively 4026 * update stats that the iflib machinery handles, and which is sensitve to 4027 * the disused IFF_DRV_OACTIVE flag. Additionally, iflib_altq_if_start() 4028 * will be installed as the start routine for use by ALTQ facilities that 4029 * need to trigger queue drains on a scheduled basis. 4030 * 4031 */ 4032 static void 4033 iflib_altq_if_start(if_t ifp) 4034 { 4035 struct ifaltq *ifq = &ifp->if_snd; 4036 struct mbuf *m; 4037 4038 IFQ_LOCK(ifq); 4039 IFQ_DEQUEUE_NOLOCK(ifq, m); 4040 while (m != NULL) { 4041 iflib_if_transmit(ifp, m); 4042 IFQ_DEQUEUE_NOLOCK(ifq, m); 4043 } 4044 IFQ_UNLOCK(ifq); 4045 } 4046 4047 static int 4048 iflib_altq_if_transmit(if_t ifp, struct mbuf *m) 4049 { 4050 int err; 4051 4052 if (ALTQ_IS_ENABLED(&ifp->if_snd)) { 4053 IFQ_ENQUEUE(&ifp->if_snd, m, err); 4054 if (err == 0) 4055 iflib_altq_if_start(ifp); 4056 } else 4057 err = iflib_if_transmit(ifp, m); 4058 4059 return (err); 4060 } 4061 #endif /* ALTQ */ 4062 4063 static void 4064 iflib_if_qflush(if_t ifp) 4065 { 4066 if_ctx_t ctx = if_getsoftc(ifp); 4067 iflib_txq_t txq = ctx->ifc_txqs; 4068 int i; 4069 4070 STATE_LOCK(ctx); 4071 ctx->ifc_flags |= IFC_QFLUSH; 4072 STATE_UNLOCK(ctx); 4073 for (i = 0; i < NTXQSETS(ctx); i++, txq++) 4074 while (!(ifmp_ring_is_idle(txq->ift_br) || ifmp_ring_is_stalled(txq->ift_br))) 4075 iflib_txq_check_drain(txq, 0); 4076 STATE_LOCK(ctx); 4077 ctx->ifc_flags &= ~IFC_QFLUSH; 4078 STATE_UNLOCK(ctx); 4079 4080 /* 4081 * When ALTQ is enabled, this will also take care of purging the 4082 * ALTQ queue(s). 4083 */ 4084 if_qflush(ifp); 4085 } 4086 4087 4088 #define IFCAP_FLAGS (IFCAP_HWCSUM_IPV6 | IFCAP_HWCSUM | IFCAP_LRO | \ 4089 IFCAP_TSO | IFCAP_VLAN_HWTAGGING | IFCAP_HWSTATS | \ 4090 IFCAP_VLAN_MTU | IFCAP_VLAN_HWFILTER | \ 4091 IFCAP_VLAN_HWTSO | IFCAP_VLAN_HWCSUM | IFCAP_NOMAP) 4092 4093 static int 4094 iflib_if_ioctl(if_t ifp, u_long command, caddr_t data) 4095 { 4096 if_ctx_t ctx = if_getsoftc(ifp); 4097 struct ifreq *ifr = (struct ifreq *)data; 4098 #if defined(INET) || defined(INET6) 4099 struct ifaddr *ifa = (struct ifaddr *)data; 4100 #endif 4101 bool avoid_reset = false; 4102 int err = 0, reinit = 0, bits; 4103 4104 switch (command) { 4105 case SIOCSIFADDR: 4106 #ifdef INET 4107 if (ifa->ifa_addr->sa_family == AF_INET) 4108 avoid_reset = true; 4109 #endif 4110 #ifdef INET6 4111 if (ifa->ifa_addr->sa_family == AF_INET6) 4112 avoid_reset = true; 4113 #endif 4114 /* 4115 ** Calling init results in link renegotiation, 4116 ** so we avoid doing it when possible. 4117 */ 4118 if (avoid_reset) { 4119 if_setflagbits(ifp, IFF_UP,0); 4120 if (!(if_getdrvflags(ifp) & IFF_DRV_RUNNING)) 4121 reinit = 1; 4122 #ifdef INET 4123 if (!(if_getflags(ifp) & IFF_NOARP)) 4124 arp_ifinit(ifp, ifa); 4125 #endif 4126 } else 4127 err = ether_ioctl(ifp, command, data); 4128 break; 4129 case SIOCSIFMTU: 4130 CTX_LOCK(ctx); 4131 if (ifr->ifr_mtu == if_getmtu(ifp)) { 4132 CTX_UNLOCK(ctx); 4133 break; 4134 } 4135 bits = if_getdrvflags(ifp); 4136 /* stop the driver and free any clusters before proceeding */ 4137 iflib_stop(ctx); 4138 4139 if ((err = IFDI_MTU_SET(ctx, ifr->ifr_mtu)) == 0) { 4140 STATE_LOCK(ctx); 4141 if (ifr->ifr_mtu > ctx->ifc_max_fl_buf_size) 4142 ctx->ifc_flags |= IFC_MULTISEG; 4143 else 4144 ctx->ifc_flags &= ~IFC_MULTISEG; 4145 STATE_UNLOCK(ctx); 4146 err = if_setmtu(ifp, ifr->ifr_mtu); 4147 } 4148 iflib_init_locked(ctx); 4149 STATE_LOCK(ctx); 4150 if_setdrvflags(ifp, bits); 4151 STATE_UNLOCK(ctx); 4152 CTX_UNLOCK(ctx); 4153 break; 4154 case SIOCSIFFLAGS: 4155 CTX_LOCK(ctx); 4156 if (if_getflags(ifp) & IFF_UP) { 4157 if (if_getdrvflags(ifp) & IFF_DRV_RUNNING) { 4158 if ((if_getflags(ifp) ^ ctx->ifc_if_flags) & 4159 (IFF_PROMISC | IFF_ALLMULTI)) { 4160 err = IFDI_PROMISC_SET(ctx, if_getflags(ifp)); 4161 } 4162 } else 4163 reinit = 1; 4164 } else if (if_getdrvflags(ifp) & IFF_DRV_RUNNING) { 4165 iflib_stop(ctx); 4166 } 4167 ctx->ifc_if_flags = if_getflags(ifp); 4168 CTX_UNLOCK(ctx); 4169 break; 4170 case SIOCADDMULTI: 4171 case SIOCDELMULTI: 4172 if (if_getdrvflags(ifp) & IFF_DRV_RUNNING) { 4173 CTX_LOCK(ctx); 4174 IFDI_INTR_DISABLE(ctx); 4175 IFDI_MULTI_SET(ctx); 4176 IFDI_INTR_ENABLE(ctx); 4177 CTX_UNLOCK(ctx); 4178 } 4179 break; 4180 case SIOCSIFMEDIA: 4181 CTX_LOCK(ctx); 4182 IFDI_MEDIA_SET(ctx); 4183 CTX_UNLOCK(ctx); 4184 /* FALLTHROUGH */ 4185 case SIOCGIFMEDIA: 4186 case SIOCGIFXMEDIA: 4187 err = ifmedia_ioctl(ifp, ifr, ctx->ifc_mediap, command); 4188 break; 4189 case SIOCGI2C: 4190 { 4191 struct ifi2creq i2c; 4192 4193 err = copyin(ifr_data_get_ptr(ifr), &i2c, sizeof(i2c)); 4194 if (err != 0) 4195 break; 4196 if (i2c.dev_addr != 0xA0 && i2c.dev_addr != 0xA2) { 4197 err = EINVAL; 4198 break; 4199 } 4200 if (i2c.len > sizeof(i2c.data)) { 4201 err = EINVAL; 4202 break; 4203 } 4204 4205 if ((err = IFDI_I2C_REQ(ctx, &i2c)) == 0) 4206 err = copyout(&i2c, ifr_data_get_ptr(ifr), 4207 sizeof(i2c)); 4208 break; 4209 } 4210 case SIOCSIFCAP: 4211 { 4212 int mask, setmask, oldmask; 4213 4214 oldmask = if_getcapenable(ifp); 4215 mask = ifr->ifr_reqcap ^ oldmask; 4216 mask &= ctx->ifc_softc_ctx.isc_capabilities | IFCAP_NOMAP; 4217 setmask = 0; 4218 #ifdef TCP_OFFLOAD 4219 setmask |= mask & (IFCAP_TOE4|IFCAP_TOE6); 4220 #endif 4221 setmask |= (mask & IFCAP_FLAGS); 4222 setmask |= (mask & IFCAP_WOL); 4223 4224 /* 4225 * If any RX csum has changed, change all the ones that 4226 * are supported by the driver. 4227 */ 4228 if (setmask & (IFCAP_RXCSUM | IFCAP_RXCSUM_IPV6)) { 4229 setmask |= ctx->ifc_softc_ctx.isc_capabilities & 4230 (IFCAP_RXCSUM | IFCAP_RXCSUM_IPV6); 4231 } 4232 4233 /* 4234 * want to ensure that traffic has stopped before we change any of the flags 4235 */ 4236 if (setmask) { 4237 CTX_LOCK(ctx); 4238 bits = if_getdrvflags(ifp); 4239 if (bits & IFF_DRV_RUNNING && setmask & ~IFCAP_WOL) 4240 iflib_stop(ctx); 4241 STATE_LOCK(ctx); 4242 if_togglecapenable(ifp, setmask); 4243 STATE_UNLOCK(ctx); 4244 if (bits & IFF_DRV_RUNNING && setmask & ~IFCAP_WOL) 4245 iflib_init_locked(ctx); 4246 STATE_LOCK(ctx); 4247 if_setdrvflags(ifp, bits); 4248 STATE_UNLOCK(ctx); 4249 CTX_UNLOCK(ctx); 4250 } 4251 if_vlancap(ifp); 4252 break; 4253 } 4254 case SIOCGPRIVATE_0: 4255 case SIOCSDRVSPEC: 4256 case SIOCGDRVSPEC: 4257 CTX_LOCK(ctx); 4258 err = IFDI_PRIV_IOCTL(ctx, command, data); 4259 CTX_UNLOCK(ctx); 4260 break; 4261 default: 4262 err = ether_ioctl(ifp, command, data); 4263 break; 4264 } 4265 if (reinit) 4266 iflib_if_init(ctx); 4267 return (err); 4268 } 4269 4270 static uint64_t 4271 iflib_if_get_counter(if_t ifp, ift_counter cnt) 4272 { 4273 if_ctx_t ctx = if_getsoftc(ifp); 4274 4275 return (IFDI_GET_COUNTER(ctx, cnt)); 4276 } 4277 4278 /********************************************************************* 4279 * 4280 * OTHER FUNCTIONS EXPORTED TO THE STACK 4281 * 4282 **********************************************************************/ 4283 4284 static void 4285 iflib_vlan_register(void *arg, if_t ifp, uint16_t vtag) 4286 { 4287 if_ctx_t ctx = if_getsoftc(ifp); 4288 4289 if ((void *)ctx != arg) 4290 return; 4291 4292 if ((vtag == 0) || (vtag > 4095)) 4293 return; 4294 4295 if (iflib_in_detach(ctx)) 4296 return; 4297 4298 CTX_LOCK(ctx); 4299 IFDI_VLAN_REGISTER(ctx, vtag); 4300 /* Re-init to load the changes */ 4301 if (if_getcapenable(ifp) & IFCAP_VLAN_HWFILTER) 4302 iflib_if_init_locked(ctx); 4303 CTX_UNLOCK(ctx); 4304 } 4305 4306 static void 4307 iflib_vlan_unregister(void *arg, if_t ifp, uint16_t vtag) 4308 { 4309 if_ctx_t ctx = if_getsoftc(ifp); 4310 4311 if ((void *)ctx != arg) 4312 return; 4313 4314 if ((vtag == 0) || (vtag > 4095)) 4315 return; 4316 4317 CTX_LOCK(ctx); 4318 IFDI_VLAN_UNREGISTER(ctx, vtag); 4319 /* Re-init to load the changes */ 4320 if (if_getcapenable(ifp) & IFCAP_VLAN_HWFILTER) 4321 iflib_if_init_locked(ctx); 4322 CTX_UNLOCK(ctx); 4323 } 4324 4325 static void 4326 iflib_led_func(void *arg, int onoff) 4327 { 4328 if_ctx_t ctx = arg; 4329 4330 CTX_LOCK(ctx); 4331 IFDI_LED_FUNC(ctx, onoff); 4332 CTX_UNLOCK(ctx); 4333 } 4334 4335 /********************************************************************* 4336 * 4337 * BUS FUNCTION DEFINITIONS 4338 * 4339 **********************************************************************/ 4340 4341 int 4342 iflib_device_probe(device_t dev) 4343 { 4344 const pci_vendor_info_t *ent; 4345 if_shared_ctx_t sctx; 4346 uint16_t pci_device_id, pci_rev_id, pci_subdevice_id, pci_subvendor_id; 4347 uint16_t pci_vendor_id; 4348 4349 if ((sctx = DEVICE_REGISTER(dev)) == NULL || sctx->isc_magic != IFLIB_MAGIC) 4350 return (ENOTSUP); 4351 4352 pci_vendor_id = pci_get_vendor(dev); 4353 pci_device_id = pci_get_device(dev); 4354 pci_subvendor_id = pci_get_subvendor(dev); 4355 pci_subdevice_id = pci_get_subdevice(dev); 4356 pci_rev_id = pci_get_revid(dev); 4357 if (sctx->isc_parse_devinfo != NULL) 4358 sctx->isc_parse_devinfo(&pci_device_id, &pci_subvendor_id, &pci_subdevice_id, &pci_rev_id); 4359 4360 ent = sctx->isc_vendor_info; 4361 while (ent->pvi_vendor_id != 0) { 4362 if (pci_vendor_id != ent->pvi_vendor_id) { 4363 ent++; 4364 continue; 4365 } 4366 if ((pci_device_id == ent->pvi_device_id) && 4367 ((pci_subvendor_id == ent->pvi_subvendor_id) || 4368 (ent->pvi_subvendor_id == 0)) && 4369 ((pci_subdevice_id == ent->pvi_subdevice_id) || 4370 (ent->pvi_subdevice_id == 0)) && 4371 ((pci_rev_id == ent->pvi_rev_id) || 4372 (ent->pvi_rev_id == 0))) { 4373 4374 device_set_desc_copy(dev, ent->pvi_name); 4375 /* this needs to be changed to zero if the bus probing code 4376 * ever stops re-probing on best match because the sctx 4377 * may have its values over written by register calls 4378 * in subsequent probes 4379 */ 4380 return (BUS_PROBE_DEFAULT); 4381 } 4382 ent++; 4383 } 4384 return (ENXIO); 4385 } 4386 4387 int 4388 iflib_device_probe_vendor(device_t dev) 4389 { 4390 int probe; 4391 4392 probe = iflib_device_probe(dev); 4393 if (probe == BUS_PROBE_DEFAULT) 4394 return (BUS_PROBE_VENDOR); 4395 else 4396 return (probe); 4397 } 4398 4399 static void 4400 iflib_reset_qvalues(if_ctx_t ctx) 4401 { 4402 if_softc_ctx_t scctx = &ctx->ifc_softc_ctx; 4403 if_shared_ctx_t sctx = ctx->ifc_sctx; 4404 device_t dev = ctx->ifc_dev; 4405 int i; 4406 4407 if (ctx->ifc_sysctl_ntxqs != 0) 4408 scctx->isc_ntxqsets = ctx->ifc_sysctl_ntxqs; 4409 if (ctx->ifc_sysctl_nrxqs != 0) 4410 scctx->isc_nrxqsets = ctx->ifc_sysctl_nrxqs; 4411 4412 for (i = 0; i < sctx->isc_ntxqs; i++) { 4413 if (ctx->ifc_sysctl_ntxds[i] != 0) 4414 scctx->isc_ntxd[i] = ctx->ifc_sysctl_ntxds[i]; 4415 else 4416 scctx->isc_ntxd[i] = sctx->isc_ntxd_default[i]; 4417 } 4418 4419 for (i = 0; i < sctx->isc_nrxqs; i++) { 4420 if (ctx->ifc_sysctl_nrxds[i] != 0) 4421 scctx->isc_nrxd[i] = ctx->ifc_sysctl_nrxds[i]; 4422 else 4423 scctx->isc_nrxd[i] = sctx->isc_nrxd_default[i]; 4424 } 4425 4426 for (i = 0; i < sctx->isc_nrxqs; i++) { 4427 if (scctx->isc_nrxd[i] < sctx->isc_nrxd_min[i]) { 4428 device_printf(dev, "nrxd%d: %d less than nrxd_min %d - resetting to min\n", 4429 i, scctx->isc_nrxd[i], sctx->isc_nrxd_min[i]); 4430 scctx->isc_nrxd[i] = sctx->isc_nrxd_min[i]; 4431 } 4432 if (scctx->isc_nrxd[i] > sctx->isc_nrxd_max[i]) { 4433 device_printf(dev, "nrxd%d: %d greater than nrxd_max %d - resetting to max\n", 4434 i, scctx->isc_nrxd[i], sctx->isc_nrxd_max[i]); 4435 scctx->isc_nrxd[i] = sctx->isc_nrxd_max[i]; 4436 } 4437 if (!powerof2(scctx->isc_nrxd[i])) { 4438 device_printf(dev, "nrxd%d: %d is not a power of 2 - using default value of %d\n", 4439 i, scctx->isc_nrxd[i], sctx->isc_nrxd_default[i]); 4440 scctx->isc_nrxd[i] = sctx->isc_nrxd_default[i]; 4441 } 4442 } 4443 4444 for (i = 0; i < sctx->isc_ntxqs; i++) { 4445 if (scctx->isc_ntxd[i] < sctx->isc_ntxd_min[i]) { 4446 device_printf(dev, "ntxd%d: %d less than ntxd_min %d - resetting to min\n", 4447 i, scctx->isc_ntxd[i], sctx->isc_ntxd_min[i]); 4448 scctx->isc_ntxd[i] = sctx->isc_ntxd_min[i]; 4449 } 4450 if (scctx->isc_ntxd[i] > sctx->isc_ntxd_max[i]) { 4451 device_printf(dev, "ntxd%d: %d greater than ntxd_max %d - resetting to max\n", 4452 i, scctx->isc_ntxd[i], sctx->isc_ntxd_max[i]); 4453 scctx->isc_ntxd[i] = sctx->isc_ntxd_max[i]; 4454 } 4455 if (!powerof2(scctx->isc_ntxd[i])) { 4456 device_printf(dev, "ntxd%d: %d is not a power of 2 - using default value of %d\n", 4457 i, scctx->isc_ntxd[i], sctx->isc_ntxd_default[i]); 4458 scctx->isc_ntxd[i] = sctx->isc_ntxd_default[i]; 4459 } 4460 } 4461 } 4462 4463 static void 4464 iflib_add_pfil(if_ctx_t ctx) 4465 { 4466 struct pfil_head *pfil; 4467 struct pfil_head_args pa; 4468 iflib_rxq_t rxq; 4469 int i; 4470 4471 pa.pa_version = PFIL_VERSION; 4472 pa.pa_flags = PFIL_IN; 4473 pa.pa_type = PFIL_TYPE_ETHERNET; 4474 pa.pa_headname = ctx->ifc_ifp->if_xname; 4475 pfil = pfil_head_register(&pa); 4476 4477 for (i = 0, rxq = ctx->ifc_rxqs; i < NRXQSETS(ctx); i++, rxq++) { 4478 rxq->pfil = pfil; 4479 } 4480 } 4481 4482 static void 4483 iflib_rem_pfil(if_ctx_t ctx) 4484 { 4485 struct pfil_head *pfil; 4486 iflib_rxq_t rxq; 4487 int i; 4488 4489 rxq = ctx->ifc_rxqs; 4490 pfil = rxq->pfil; 4491 for (i = 0; i < NRXQSETS(ctx); i++, rxq++) { 4492 rxq->pfil = NULL; 4493 } 4494 pfil_head_unregister(pfil); 4495 } 4496 4497 static uint16_t 4498 get_ctx_core_offset(if_ctx_t ctx) 4499 { 4500 if_softc_ctx_t scctx = &ctx->ifc_softc_ctx; 4501 struct cpu_offset *op; 4502 uint16_t qc; 4503 uint16_t ret = ctx->ifc_sysctl_core_offset; 4504 4505 if (ret != CORE_OFFSET_UNSPECIFIED) 4506 return (ret); 4507 4508 if (ctx->ifc_sysctl_separate_txrx) 4509 qc = scctx->isc_ntxqsets + scctx->isc_nrxqsets; 4510 else 4511 qc = max(scctx->isc_ntxqsets, scctx->isc_nrxqsets); 4512 4513 mtx_lock(&cpu_offset_mtx); 4514 SLIST_FOREACH(op, &cpu_offsets, entries) { 4515 if (CPU_CMP(&ctx->ifc_cpus, &op->set) == 0) { 4516 ret = op->offset; 4517 op->offset += qc; 4518 MPASS(op->refcount < UINT_MAX); 4519 op->refcount++; 4520 break; 4521 } 4522 } 4523 if (ret == CORE_OFFSET_UNSPECIFIED) { 4524 ret = 0; 4525 op = malloc(sizeof(struct cpu_offset), M_IFLIB, 4526 M_NOWAIT | M_ZERO); 4527 if (op == NULL) { 4528 device_printf(ctx->ifc_dev, 4529 "allocation for cpu offset failed.\n"); 4530 } else { 4531 op->offset = qc; 4532 op->refcount = 1; 4533 CPU_COPY(&ctx->ifc_cpus, &op->set); 4534 SLIST_INSERT_HEAD(&cpu_offsets, op, entries); 4535 } 4536 } 4537 mtx_unlock(&cpu_offset_mtx); 4538 4539 return (ret); 4540 } 4541 4542 static void 4543 unref_ctx_core_offset(if_ctx_t ctx) 4544 { 4545 struct cpu_offset *op, *top; 4546 4547 mtx_lock(&cpu_offset_mtx); 4548 SLIST_FOREACH_SAFE(op, &cpu_offsets, entries, top) { 4549 if (CPU_CMP(&ctx->ifc_cpus, &op->set) == 0) { 4550 MPASS(op->refcount > 0); 4551 op->refcount--; 4552 if (op->refcount == 0) { 4553 SLIST_REMOVE(&cpu_offsets, op, cpu_offset, entries); 4554 free(op, M_IFLIB); 4555 } 4556 break; 4557 } 4558 } 4559 mtx_unlock(&cpu_offset_mtx); 4560 } 4561 4562 int 4563 iflib_device_register(device_t dev, void *sc, if_shared_ctx_t sctx, if_ctx_t *ctxp) 4564 { 4565 if_ctx_t ctx; 4566 if_t ifp; 4567 if_softc_ctx_t scctx; 4568 kobjop_desc_t kobj_desc; 4569 kobj_method_t *kobj_method; 4570 int err, msix, rid; 4571 uint16_t main_rxq, main_txq; 4572 4573 ctx = malloc(sizeof(* ctx), M_IFLIB, M_WAITOK|M_ZERO); 4574 4575 if (sc == NULL) { 4576 sc = malloc(sctx->isc_driver->size, M_IFLIB, M_WAITOK|M_ZERO); 4577 device_set_softc(dev, ctx); 4578 ctx->ifc_flags |= IFC_SC_ALLOCATED; 4579 } 4580 4581 ctx->ifc_sctx = sctx; 4582 ctx->ifc_dev = dev; 4583 ctx->ifc_softc = sc; 4584 4585 if ((err = iflib_register(ctx)) != 0) { 4586 device_printf(dev, "iflib_register failed %d\n", err); 4587 goto fail_ctx_free; 4588 } 4589 iflib_add_device_sysctl_pre(ctx); 4590 4591 scctx = &ctx->ifc_softc_ctx; 4592 ifp = ctx->ifc_ifp; 4593 4594 iflib_reset_qvalues(ctx); 4595 CTX_LOCK(ctx); 4596 if ((err = IFDI_ATTACH_PRE(ctx)) != 0) { 4597 device_printf(dev, "IFDI_ATTACH_PRE failed %d\n", err); 4598 goto fail_unlock; 4599 } 4600 _iflib_pre_assert(scctx); 4601 ctx->ifc_txrx = *scctx->isc_txrx; 4602 4603 if (sctx->isc_flags & IFLIB_DRIVER_MEDIA) 4604 ctx->ifc_mediap = scctx->isc_media; 4605 4606 #ifdef INVARIANTS 4607 if (scctx->isc_capabilities & IFCAP_TXCSUM) 4608 MPASS(scctx->isc_tx_csum_flags); 4609 #endif 4610 4611 if_setcapabilities(ifp, 4612 scctx->isc_capabilities | IFCAP_HWSTATS | IFCAP_NOMAP); 4613 if_setcapenable(ifp, 4614 scctx->isc_capenable | IFCAP_HWSTATS | IFCAP_NOMAP); 4615 4616 if (scctx->isc_ntxqsets == 0 || (scctx->isc_ntxqsets_max && scctx->isc_ntxqsets_max < scctx->isc_ntxqsets)) 4617 scctx->isc_ntxqsets = scctx->isc_ntxqsets_max; 4618 if (scctx->isc_nrxqsets == 0 || (scctx->isc_nrxqsets_max && scctx->isc_nrxqsets_max < scctx->isc_nrxqsets)) 4619 scctx->isc_nrxqsets = scctx->isc_nrxqsets_max; 4620 4621 main_txq = (sctx->isc_flags & IFLIB_HAS_TXCQ) ? 1 : 0; 4622 main_rxq = (sctx->isc_flags & IFLIB_HAS_RXCQ) ? 1 : 0; 4623 4624 /* XXX change for per-queue sizes */ 4625 device_printf(dev, "Using %d TX descriptors and %d RX descriptors\n", 4626 scctx->isc_ntxd[main_txq], scctx->isc_nrxd[main_rxq]); 4627 4628 if (scctx->isc_tx_nsegments > scctx->isc_ntxd[main_txq] / 4629 MAX_SINGLE_PACKET_FRACTION) 4630 scctx->isc_tx_nsegments = max(1, scctx->isc_ntxd[main_txq] / 4631 MAX_SINGLE_PACKET_FRACTION); 4632 if (scctx->isc_tx_tso_segments_max > scctx->isc_ntxd[main_txq] / 4633 MAX_SINGLE_PACKET_FRACTION) 4634 scctx->isc_tx_tso_segments_max = max(1, 4635 scctx->isc_ntxd[main_txq] / MAX_SINGLE_PACKET_FRACTION); 4636 4637 /* TSO parameters - dig these out of the data sheet - simply correspond to tag setup */ 4638 if (if_getcapabilities(ifp) & IFCAP_TSO) { 4639 /* 4640 * The stack can't handle a TSO size larger than IP_MAXPACKET, 4641 * but some MACs do. 4642 */ 4643 if_sethwtsomax(ifp, min(scctx->isc_tx_tso_size_max, 4644 IP_MAXPACKET)); 4645 /* 4646 * Take maximum number of m_pullup(9)'s in iflib_parse_header() 4647 * into account. In the worst case, each of these calls will 4648 * add another mbuf and, thus, the requirement for another DMA 4649 * segment. So for best performance, it doesn't make sense to 4650 * advertize a maximum of TSO segments that typically will 4651 * require defragmentation in iflib_encap(). 4652 */ 4653 if_sethwtsomaxsegcount(ifp, scctx->isc_tx_tso_segments_max - 3); 4654 if_sethwtsomaxsegsize(ifp, scctx->isc_tx_tso_segsize_max); 4655 } 4656 if (scctx->isc_rss_table_size == 0) 4657 scctx->isc_rss_table_size = 64; 4658 scctx->isc_rss_table_mask = scctx->isc_rss_table_size-1; 4659 4660 GROUPTASK_INIT(&ctx->ifc_admin_task, 0, _task_fn_admin, ctx); 4661 /* XXX format name */ 4662 taskqgroup_attach(qgroup_if_config_tqg, &ctx->ifc_admin_task, ctx, 4663 NULL, NULL, "admin"); 4664 4665 /* Set up cpu set. If it fails, use the set of all CPUs. */ 4666 if (bus_get_cpus(dev, INTR_CPUS, sizeof(ctx->ifc_cpus), &ctx->ifc_cpus) != 0) { 4667 device_printf(dev, "Unable to fetch CPU list\n"); 4668 CPU_COPY(&all_cpus, &ctx->ifc_cpus); 4669 } 4670 MPASS(CPU_COUNT(&ctx->ifc_cpus) > 0); 4671 4672 /* 4673 ** Now set up MSI or MSI-X, should return us the number of supported 4674 ** vectors (will be 1 for a legacy interrupt and MSI). 4675 */ 4676 if (sctx->isc_flags & IFLIB_SKIP_MSIX) { 4677 msix = scctx->isc_vectors; 4678 } else if (scctx->isc_msix_bar != 0) 4679 /* 4680 * The simple fact that isc_msix_bar is not 0 does not mean we 4681 * we have a good value there that is known to work. 4682 */ 4683 msix = iflib_msix_init(ctx); 4684 else { 4685 scctx->isc_vectors = 1; 4686 scctx->isc_ntxqsets = 1; 4687 scctx->isc_nrxqsets = 1; 4688 scctx->isc_intr = IFLIB_INTR_LEGACY; 4689 msix = 0; 4690 } 4691 /* Get memory for the station queues */ 4692 if ((err = iflib_queues_alloc(ctx))) { 4693 device_printf(dev, "Unable to allocate queue memory\n"); 4694 goto fail_intr_free; 4695 } 4696 4697 if ((err = iflib_qset_structures_setup(ctx))) 4698 goto fail_queues; 4699 4700 /* 4701 * Now that we know how many queues there are, get the core offset. 4702 */ 4703 ctx->ifc_sysctl_core_offset = get_ctx_core_offset(ctx); 4704 4705 /* 4706 * Group taskqueues aren't properly set up until SMP is started, 4707 * so we disable interrupts until we can handle them post 4708 * SI_SUB_SMP. 4709 * 4710 * XXX: disabling interrupts doesn't actually work, at least for 4711 * the non-MSI case. When they occur before SI_SUB_SMP completes, 4712 * we do null handling and depend on this not causing too large an 4713 * interrupt storm. 4714 */ 4715 IFDI_INTR_DISABLE(ctx); 4716 4717 if (msix > 1) { 4718 /* 4719 * When using MSI-X, ensure that ifdi_{r,t}x_queue_intr_enable 4720 * aren't the default NULL implementation. 4721 */ 4722 kobj_desc = &ifdi_rx_queue_intr_enable_desc; 4723 kobj_method = kobj_lookup_method(((kobj_t)ctx)->ops->cls, NULL, 4724 kobj_desc); 4725 if (kobj_method == &kobj_desc->deflt) { 4726 device_printf(dev, 4727 "MSI-X requires ifdi_rx_queue_intr_enable method"); 4728 err = EOPNOTSUPP; 4729 goto fail_queues; 4730 } 4731 kobj_desc = &ifdi_tx_queue_intr_enable_desc; 4732 kobj_method = kobj_lookup_method(((kobj_t)ctx)->ops->cls, NULL, 4733 kobj_desc); 4734 if (kobj_method == &kobj_desc->deflt) { 4735 device_printf(dev, 4736 "MSI-X requires ifdi_tx_queue_intr_enable method"); 4737 err = EOPNOTSUPP; 4738 goto fail_queues; 4739 } 4740 4741 /* 4742 * Assign the MSI-X vectors. 4743 * Note that the default NULL ifdi_msix_intr_assign method will 4744 * fail here, too. 4745 */ 4746 err = IFDI_MSIX_INTR_ASSIGN(ctx, msix); 4747 if (err != 0) { 4748 device_printf(dev, "IFDI_MSIX_INTR_ASSIGN failed %d\n", 4749 err); 4750 goto fail_queues; 4751 } 4752 } else if (scctx->isc_intr != IFLIB_INTR_MSIX) { 4753 rid = 0; 4754 if (scctx->isc_intr == IFLIB_INTR_MSI) { 4755 MPASS(msix == 1); 4756 rid = 1; 4757 } 4758 if ((err = iflib_legacy_setup(ctx, ctx->isc_legacy_intr, ctx->ifc_softc, &rid, "irq0")) != 0) { 4759 device_printf(dev, "iflib_legacy_setup failed %d\n", err); 4760 goto fail_queues; 4761 } 4762 } else { 4763 device_printf(dev, 4764 "Cannot use iflib with only 1 MSI-X interrupt!\n"); 4765 err = ENODEV; 4766 goto fail_intr_free; 4767 } 4768 4769 ether_ifattach(ctx->ifc_ifp, ctx->ifc_mac.octet); 4770 4771 if ((err = IFDI_ATTACH_POST(ctx)) != 0) { 4772 device_printf(dev, "IFDI_ATTACH_POST failed %d\n", err); 4773 goto fail_detach; 4774 } 4775 4776 /* 4777 * Tell the upper layer(s) if IFCAP_VLAN_MTU is supported. 4778 * This must appear after the call to ether_ifattach() because 4779 * ether_ifattach() sets if_hdrlen to the default value. 4780 */ 4781 if (if_getcapabilities(ifp) & IFCAP_VLAN_MTU) 4782 if_setifheaderlen(ifp, sizeof(struct ether_vlan_header)); 4783 4784 if ((err = iflib_netmap_attach(ctx))) { 4785 device_printf(ctx->ifc_dev, "netmap attach failed: %d\n", err); 4786 goto fail_detach; 4787 } 4788 *ctxp = ctx; 4789 4790 DEBUGNET_SET(ctx->ifc_ifp, iflib); 4791 4792 if_setgetcounterfn(ctx->ifc_ifp, iflib_if_get_counter); 4793 iflib_add_device_sysctl_post(ctx); 4794 iflib_add_pfil(ctx); 4795 ctx->ifc_flags |= IFC_INIT_DONE; 4796 CTX_UNLOCK(ctx); 4797 4798 return (0); 4799 4800 fail_detach: 4801 ether_ifdetach(ctx->ifc_ifp); 4802 fail_intr_free: 4803 iflib_free_intr_mem(ctx); 4804 fail_queues: 4805 iflib_tx_structures_free(ctx); 4806 iflib_rx_structures_free(ctx); 4807 taskqgroup_detach(qgroup_if_config_tqg, &ctx->ifc_admin_task); 4808 IFDI_DETACH(ctx); 4809 fail_unlock: 4810 CTX_UNLOCK(ctx); 4811 iflib_deregister(ctx); 4812 fail_ctx_free: 4813 device_set_softc(ctx->ifc_dev, NULL); 4814 if (ctx->ifc_flags & IFC_SC_ALLOCATED) 4815 free(ctx->ifc_softc, M_IFLIB); 4816 free(ctx, M_IFLIB); 4817 return (err); 4818 } 4819 4820 int 4821 iflib_pseudo_register(device_t dev, if_shared_ctx_t sctx, if_ctx_t *ctxp, 4822 struct iflib_cloneattach_ctx *clctx) 4823 { 4824 int err; 4825 if_ctx_t ctx; 4826 if_t ifp; 4827 if_softc_ctx_t scctx; 4828 int i; 4829 void *sc; 4830 uint16_t main_txq; 4831 uint16_t main_rxq; 4832 4833 ctx = malloc(sizeof(*ctx), M_IFLIB, M_WAITOK|M_ZERO); 4834 sc = malloc(sctx->isc_driver->size, M_IFLIB, M_WAITOK|M_ZERO); 4835 ctx->ifc_flags |= IFC_SC_ALLOCATED; 4836 if (sctx->isc_flags & (IFLIB_PSEUDO|IFLIB_VIRTUAL)) 4837 ctx->ifc_flags |= IFC_PSEUDO; 4838 4839 ctx->ifc_sctx = sctx; 4840 ctx->ifc_softc = sc; 4841 ctx->ifc_dev = dev; 4842 4843 if ((err = iflib_register(ctx)) != 0) { 4844 device_printf(dev, "%s: iflib_register failed %d\n", __func__, err); 4845 goto fail_ctx_free; 4846 } 4847 iflib_add_device_sysctl_pre(ctx); 4848 4849 scctx = &ctx->ifc_softc_ctx; 4850 ifp = ctx->ifc_ifp; 4851 4852 iflib_reset_qvalues(ctx); 4853 CTX_LOCK(ctx); 4854 if ((err = IFDI_ATTACH_PRE(ctx)) != 0) { 4855 device_printf(dev, "IFDI_ATTACH_PRE failed %d\n", err); 4856 goto fail_unlock; 4857 } 4858 if (sctx->isc_flags & IFLIB_GEN_MAC) 4859 ether_gen_addr(ifp, &ctx->ifc_mac); 4860 if ((err = IFDI_CLONEATTACH(ctx, clctx->cc_ifc, clctx->cc_name, 4861 clctx->cc_params)) != 0) { 4862 device_printf(dev, "IFDI_CLONEATTACH failed %d\n", err); 4863 goto fail_ctx_free; 4864 } 4865 ifmedia_add(ctx->ifc_mediap, IFM_ETHER | IFM_1000_T | IFM_FDX, 0, NULL); 4866 ifmedia_add(ctx->ifc_mediap, IFM_ETHER | IFM_AUTO, 0, NULL); 4867 ifmedia_set(ctx->ifc_mediap, IFM_ETHER | IFM_AUTO); 4868 4869 #ifdef INVARIANTS 4870 if (scctx->isc_capabilities & IFCAP_TXCSUM) 4871 MPASS(scctx->isc_tx_csum_flags); 4872 #endif 4873 4874 if_setcapabilities(ifp, scctx->isc_capabilities | IFCAP_HWSTATS | IFCAP_LINKSTATE); 4875 if_setcapenable(ifp, scctx->isc_capenable | IFCAP_HWSTATS | IFCAP_LINKSTATE); 4876 4877 ifp->if_flags |= IFF_NOGROUP; 4878 if (sctx->isc_flags & IFLIB_PSEUDO) { 4879 ether_ifattach(ctx->ifc_ifp, ctx->ifc_mac.octet); 4880 4881 if ((err = IFDI_ATTACH_POST(ctx)) != 0) { 4882 device_printf(dev, "IFDI_ATTACH_POST failed %d\n", err); 4883 goto fail_detach; 4884 } 4885 *ctxp = ctx; 4886 4887 /* 4888 * Tell the upper layer(s) if IFCAP_VLAN_MTU is supported. 4889 * This must appear after the call to ether_ifattach() because 4890 * ether_ifattach() sets if_hdrlen to the default value. 4891 */ 4892 if (if_getcapabilities(ifp) & IFCAP_VLAN_MTU) 4893 if_setifheaderlen(ifp, 4894 sizeof(struct ether_vlan_header)); 4895 4896 if_setgetcounterfn(ctx->ifc_ifp, iflib_if_get_counter); 4897 iflib_add_device_sysctl_post(ctx); 4898 ctx->ifc_flags |= IFC_INIT_DONE; 4899 return (0); 4900 } 4901 _iflib_pre_assert(scctx); 4902 ctx->ifc_txrx = *scctx->isc_txrx; 4903 4904 if (scctx->isc_ntxqsets == 0 || (scctx->isc_ntxqsets_max && scctx->isc_ntxqsets_max < scctx->isc_ntxqsets)) 4905 scctx->isc_ntxqsets = scctx->isc_ntxqsets_max; 4906 if (scctx->isc_nrxqsets == 0 || (scctx->isc_nrxqsets_max && scctx->isc_nrxqsets_max < scctx->isc_nrxqsets)) 4907 scctx->isc_nrxqsets = scctx->isc_nrxqsets_max; 4908 4909 main_txq = (sctx->isc_flags & IFLIB_HAS_TXCQ) ? 1 : 0; 4910 main_rxq = (sctx->isc_flags & IFLIB_HAS_RXCQ) ? 1 : 0; 4911 4912 /* XXX change for per-queue sizes */ 4913 device_printf(dev, "Using %d TX descriptors and %d RX descriptors\n", 4914 scctx->isc_ntxd[main_txq], scctx->isc_nrxd[main_rxq]); 4915 4916 if (scctx->isc_tx_nsegments > scctx->isc_ntxd[main_txq] / 4917 MAX_SINGLE_PACKET_FRACTION) 4918 scctx->isc_tx_nsegments = max(1, scctx->isc_ntxd[main_txq] / 4919 MAX_SINGLE_PACKET_FRACTION); 4920 if (scctx->isc_tx_tso_segments_max > scctx->isc_ntxd[main_txq] / 4921 MAX_SINGLE_PACKET_FRACTION) 4922 scctx->isc_tx_tso_segments_max = max(1, 4923 scctx->isc_ntxd[main_txq] / MAX_SINGLE_PACKET_FRACTION); 4924 4925 /* TSO parameters - dig these out of the data sheet - simply correspond to tag setup */ 4926 if (if_getcapabilities(ifp) & IFCAP_TSO) { 4927 /* 4928 * The stack can't handle a TSO size larger than IP_MAXPACKET, 4929 * but some MACs do. 4930 */ 4931 if_sethwtsomax(ifp, min(scctx->isc_tx_tso_size_max, 4932 IP_MAXPACKET)); 4933 /* 4934 * Take maximum number of m_pullup(9)'s in iflib_parse_header() 4935 * into account. In the worst case, each of these calls will 4936 * add another mbuf and, thus, the requirement for another DMA 4937 * segment. So for best performance, it doesn't make sense to 4938 * advertize a maximum of TSO segments that typically will 4939 * require defragmentation in iflib_encap(). 4940 */ 4941 if_sethwtsomaxsegcount(ifp, scctx->isc_tx_tso_segments_max - 3); 4942 if_sethwtsomaxsegsize(ifp, scctx->isc_tx_tso_segsize_max); 4943 } 4944 if (scctx->isc_rss_table_size == 0) 4945 scctx->isc_rss_table_size = 64; 4946 scctx->isc_rss_table_mask = scctx->isc_rss_table_size-1; 4947 4948 GROUPTASK_INIT(&ctx->ifc_admin_task, 0, _task_fn_admin, ctx); 4949 /* XXX format name */ 4950 taskqgroup_attach(qgroup_if_config_tqg, &ctx->ifc_admin_task, ctx, 4951 NULL, NULL, "admin"); 4952 4953 /* XXX --- can support > 1 -- but keep it simple for now */ 4954 scctx->isc_intr = IFLIB_INTR_LEGACY; 4955 4956 /* Get memory for the station queues */ 4957 if ((err = iflib_queues_alloc(ctx))) { 4958 device_printf(dev, "Unable to allocate queue memory\n"); 4959 goto fail_iflib_detach; 4960 } 4961 4962 if ((err = iflib_qset_structures_setup(ctx))) { 4963 device_printf(dev, "qset structure setup failed %d\n", err); 4964 goto fail_queues; 4965 } 4966 4967 /* 4968 * XXX What if anything do we want to do about interrupts? 4969 */ 4970 ether_ifattach(ctx->ifc_ifp, ctx->ifc_mac.octet); 4971 if ((err = IFDI_ATTACH_POST(ctx)) != 0) { 4972 device_printf(dev, "IFDI_ATTACH_POST failed %d\n", err); 4973 goto fail_detach; 4974 } 4975 4976 /* 4977 * Tell the upper layer(s) if IFCAP_VLAN_MTU is supported. 4978 * This must appear after the call to ether_ifattach() because 4979 * ether_ifattach() sets if_hdrlen to the default value. 4980 */ 4981 if (if_getcapabilities(ifp) & IFCAP_VLAN_MTU) 4982 if_setifheaderlen(ifp, sizeof(struct ether_vlan_header)); 4983 4984 /* XXX handle more than one queue */ 4985 for (i = 0; i < scctx->isc_nrxqsets; i++) 4986 IFDI_RX_CLSET(ctx, 0, i, ctx->ifc_rxqs[i].ifr_fl[0].ifl_sds.ifsd_cl); 4987 4988 *ctxp = ctx; 4989 4990 if_setgetcounterfn(ctx->ifc_ifp, iflib_if_get_counter); 4991 iflib_add_device_sysctl_post(ctx); 4992 ctx->ifc_flags |= IFC_INIT_DONE; 4993 CTX_UNLOCK(ctx); 4994 4995 return (0); 4996 fail_detach: 4997 ether_ifdetach(ctx->ifc_ifp); 4998 fail_queues: 4999 iflib_tx_structures_free(ctx); 5000 iflib_rx_structures_free(ctx); 5001 fail_iflib_detach: 5002 IFDI_DETACH(ctx); 5003 fail_unlock: 5004 CTX_UNLOCK(ctx); 5005 iflib_deregister(ctx); 5006 fail_ctx_free: 5007 free(ctx->ifc_softc, M_IFLIB); 5008 free(ctx, M_IFLIB); 5009 return (err); 5010 } 5011 5012 int 5013 iflib_pseudo_deregister(if_ctx_t ctx) 5014 { 5015 if_t ifp = ctx->ifc_ifp; 5016 iflib_txq_t txq; 5017 iflib_rxq_t rxq; 5018 int i, j; 5019 struct taskqgroup *tqg; 5020 iflib_fl_t fl; 5021 5022 /* Unregister VLAN event handlers early */ 5023 iflib_unregister_vlan_handlers(ctx); 5024 5025 ether_ifdetach(ifp); 5026 /* XXX drain any dependent tasks */ 5027 tqg = qgroup_if_io_tqg; 5028 for (txq = ctx->ifc_txqs, i = 0; i < NTXQSETS(ctx); i++, txq++) { 5029 callout_drain(&txq->ift_timer); 5030 if (txq->ift_task.gt_uniq != NULL) 5031 taskqgroup_detach(tqg, &txq->ift_task); 5032 } 5033 for (i = 0, rxq = ctx->ifc_rxqs; i < NRXQSETS(ctx); i++, rxq++) { 5034 if (rxq->ifr_task.gt_uniq != NULL) 5035 taskqgroup_detach(tqg, &rxq->ifr_task); 5036 5037 for (j = 0, fl = rxq->ifr_fl; j < rxq->ifr_nfl; j++, fl++) 5038 free(fl->ifl_rx_bitmap, M_IFLIB); 5039 } 5040 tqg = qgroup_if_config_tqg; 5041 if (ctx->ifc_admin_task.gt_uniq != NULL) 5042 taskqgroup_detach(tqg, &ctx->ifc_admin_task); 5043 if (ctx->ifc_vflr_task.gt_uniq != NULL) 5044 taskqgroup_detach(tqg, &ctx->ifc_vflr_task); 5045 5046 iflib_tx_structures_free(ctx); 5047 iflib_rx_structures_free(ctx); 5048 5049 iflib_deregister(ctx); 5050 5051 if (ctx->ifc_flags & IFC_SC_ALLOCATED) 5052 free(ctx->ifc_softc, M_IFLIB); 5053 free(ctx, M_IFLIB); 5054 return (0); 5055 } 5056 5057 int 5058 iflib_device_attach(device_t dev) 5059 { 5060 if_ctx_t ctx; 5061 if_shared_ctx_t sctx; 5062 5063 if ((sctx = DEVICE_REGISTER(dev)) == NULL || sctx->isc_magic != IFLIB_MAGIC) 5064 return (ENOTSUP); 5065 5066 pci_enable_busmaster(dev); 5067 5068 return (iflib_device_register(dev, NULL, sctx, &ctx)); 5069 } 5070 5071 int 5072 iflib_device_deregister(if_ctx_t ctx) 5073 { 5074 if_t ifp = ctx->ifc_ifp; 5075 iflib_txq_t txq; 5076 iflib_rxq_t rxq; 5077 device_t dev = ctx->ifc_dev; 5078 int i, j; 5079 struct taskqgroup *tqg; 5080 iflib_fl_t fl; 5081 5082 /* Make sure VLANS are not using driver */ 5083 if (if_vlantrunkinuse(ifp)) { 5084 device_printf(dev, "Vlan in use, detach first\n"); 5085 return (EBUSY); 5086 } 5087 #ifdef PCI_IOV 5088 if (!CTX_IS_VF(ctx) && pci_iov_detach(dev) != 0) { 5089 device_printf(dev, "SR-IOV in use; detach first.\n"); 5090 return (EBUSY); 5091 } 5092 #endif 5093 5094 STATE_LOCK(ctx); 5095 ctx->ifc_flags |= IFC_IN_DETACH; 5096 STATE_UNLOCK(ctx); 5097 5098 /* Unregister VLAN handlers before calling iflib_stop() */ 5099 iflib_unregister_vlan_handlers(ctx); 5100 5101 iflib_netmap_detach(ifp); 5102 ether_ifdetach(ifp); 5103 5104 CTX_LOCK(ctx); 5105 iflib_stop(ctx); 5106 CTX_UNLOCK(ctx); 5107 5108 iflib_rem_pfil(ctx); 5109 if (ctx->ifc_led_dev != NULL) 5110 led_destroy(ctx->ifc_led_dev); 5111 /* XXX drain any dependent tasks */ 5112 tqg = qgroup_if_io_tqg; 5113 for (txq = ctx->ifc_txqs, i = 0; i < NTXQSETS(ctx); i++, txq++) { 5114 callout_drain(&txq->ift_timer); 5115 if (txq->ift_task.gt_uniq != NULL) 5116 taskqgroup_detach(tqg, &txq->ift_task); 5117 } 5118 for (i = 0, rxq = ctx->ifc_rxqs; i < NRXQSETS(ctx); i++, rxq++) { 5119 if (rxq->ifr_task.gt_uniq != NULL) 5120 taskqgroup_detach(tqg, &rxq->ifr_task); 5121 5122 for (j = 0, fl = rxq->ifr_fl; j < rxq->ifr_nfl; j++, fl++) 5123 free(fl->ifl_rx_bitmap, M_IFLIB); 5124 } 5125 tqg = qgroup_if_config_tqg; 5126 if (ctx->ifc_admin_task.gt_uniq != NULL) 5127 taskqgroup_detach(tqg, &ctx->ifc_admin_task); 5128 if (ctx->ifc_vflr_task.gt_uniq != NULL) 5129 taskqgroup_detach(tqg, &ctx->ifc_vflr_task); 5130 CTX_LOCK(ctx); 5131 IFDI_DETACH(ctx); 5132 CTX_UNLOCK(ctx); 5133 5134 /* ether_ifdetach calls if_qflush - lock must be destroy afterwards*/ 5135 iflib_free_intr_mem(ctx); 5136 5137 bus_generic_detach(dev); 5138 5139 iflib_tx_structures_free(ctx); 5140 iflib_rx_structures_free(ctx); 5141 5142 iflib_deregister(ctx); 5143 5144 device_set_softc(ctx->ifc_dev, NULL); 5145 if (ctx->ifc_flags & IFC_SC_ALLOCATED) 5146 free(ctx->ifc_softc, M_IFLIB); 5147 unref_ctx_core_offset(ctx); 5148 free(ctx, M_IFLIB); 5149 return (0); 5150 } 5151 5152 static void 5153 iflib_free_intr_mem(if_ctx_t ctx) 5154 { 5155 5156 if (ctx->ifc_softc_ctx.isc_intr != IFLIB_INTR_MSIX) { 5157 iflib_irq_free(ctx, &ctx->ifc_legacy_irq); 5158 } 5159 if (ctx->ifc_softc_ctx.isc_intr != IFLIB_INTR_LEGACY) { 5160 pci_release_msi(ctx->ifc_dev); 5161 } 5162 if (ctx->ifc_msix_mem != NULL) { 5163 bus_release_resource(ctx->ifc_dev, SYS_RES_MEMORY, 5164 rman_get_rid(ctx->ifc_msix_mem), ctx->ifc_msix_mem); 5165 ctx->ifc_msix_mem = NULL; 5166 } 5167 } 5168 5169 int 5170 iflib_device_detach(device_t dev) 5171 { 5172 if_ctx_t ctx = device_get_softc(dev); 5173 5174 return (iflib_device_deregister(ctx)); 5175 } 5176 5177 int 5178 iflib_device_suspend(device_t dev) 5179 { 5180 if_ctx_t ctx = device_get_softc(dev); 5181 5182 CTX_LOCK(ctx); 5183 IFDI_SUSPEND(ctx); 5184 CTX_UNLOCK(ctx); 5185 5186 return bus_generic_suspend(dev); 5187 } 5188 int 5189 iflib_device_shutdown(device_t dev) 5190 { 5191 if_ctx_t ctx = device_get_softc(dev); 5192 5193 CTX_LOCK(ctx); 5194 IFDI_SHUTDOWN(ctx); 5195 CTX_UNLOCK(ctx); 5196 5197 return bus_generic_suspend(dev); 5198 } 5199 5200 5201 int 5202 iflib_device_resume(device_t dev) 5203 { 5204 if_ctx_t ctx = device_get_softc(dev); 5205 iflib_txq_t txq = ctx->ifc_txqs; 5206 5207 CTX_LOCK(ctx); 5208 IFDI_RESUME(ctx); 5209 iflib_if_init_locked(ctx); 5210 CTX_UNLOCK(ctx); 5211 for (int i = 0; i < NTXQSETS(ctx); i++, txq++) 5212 iflib_txq_check_drain(txq, IFLIB_RESTART_BUDGET); 5213 5214 return (bus_generic_resume(dev)); 5215 } 5216 5217 int 5218 iflib_device_iov_init(device_t dev, uint16_t num_vfs, const nvlist_t *params) 5219 { 5220 int error; 5221 if_ctx_t ctx = device_get_softc(dev); 5222 5223 CTX_LOCK(ctx); 5224 error = IFDI_IOV_INIT(ctx, num_vfs, params); 5225 CTX_UNLOCK(ctx); 5226 5227 return (error); 5228 } 5229 5230 void 5231 iflib_device_iov_uninit(device_t dev) 5232 { 5233 if_ctx_t ctx = device_get_softc(dev); 5234 5235 CTX_LOCK(ctx); 5236 IFDI_IOV_UNINIT(ctx); 5237 CTX_UNLOCK(ctx); 5238 } 5239 5240 int 5241 iflib_device_iov_add_vf(device_t dev, uint16_t vfnum, const nvlist_t *params) 5242 { 5243 int error; 5244 if_ctx_t ctx = device_get_softc(dev); 5245 5246 CTX_LOCK(ctx); 5247 error = IFDI_IOV_VF_ADD(ctx, vfnum, params); 5248 CTX_UNLOCK(ctx); 5249 5250 return (error); 5251 } 5252 5253 /********************************************************************* 5254 * 5255 * MODULE FUNCTION DEFINITIONS 5256 * 5257 **********************************************************************/ 5258 5259 /* 5260 * - Start a fast taskqueue thread for each core 5261 * - Start a taskqueue for control operations 5262 */ 5263 static int 5264 iflib_module_init(void) 5265 { 5266 return (0); 5267 } 5268 5269 static int 5270 iflib_module_event_handler(module_t mod, int what, void *arg) 5271 { 5272 int err; 5273 5274 switch (what) { 5275 case MOD_LOAD: 5276 if ((err = iflib_module_init()) != 0) 5277 return (err); 5278 break; 5279 case MOD_UNLOAD: 5280 return (EBUSY); 5281 default: 5282 return (EOPNOTSUPP); 5283 } 5284 5285 return (0); 5286 } 5287 5288 /********************************************************************* 5289 * 5290 * PUBLIC FUNCTION DEFINITIONS 5291 * ordered as in iflib.h 5292 * 5293 **********************************************************************/ 5294 5295 5296 static void 5297 _iflib_assert(if_shared_ctx_t sctx) 5298 { 5299 int i; 5300 5301 MPASS(sctx->isc_tx_maxsize); 5302 MPASS(sctx->isc_tx_maxsegsize); 5303 5304 MPASS(sctx->isc_rx_maxsize); 5305 MPASS(sctx->isc_rx_nsegments); 5306 MPASS(sctx->isc_rx_maxsegsize); 5307 5308 MPASS(sctx->isc_nrxqs >= 1 && sctx->isc_nrxqs <= 8); 5309 for (i = 0; i < sctx->isc_nrxqs; i++) { 5310 MPASS(sctx->isc_nrxd_min[i]); 5311 MPASS(powerof2(sctx->isc_nrxd_min[i])); 5312 MPASS(sctx->isc_nrxd_max[i]); 5313 MPASS(powerof2(sctx->isc_nrxd_max[i])); 5314 MPASS(sctx->isc_nrxd_default[i]); 5315 MPASS(powerof2(sctx->isc_nrxd_default[i])); 5316 } 5317 5318 MPASS(sctx->isc_ntxqs >= 1 && sctx->isc_ntxqs <= 8); 5319 for (i = 0; i < sctx->isc_ntxqs; i++) { 5320 MPASS(sctx->isc_ntxd_min[i]); 5321 MPASS(powerof2(sctx->isc_ntxd_min[i])); 5322 MPASS(sctx->isc_ntxd_max[i]); 5323 MPASS(powerof2(sctx->isc_ntxd_max[i])); 5324 MPASS(sctx->isc_ntxd_default[i]); 5325 MPASS(powerof2(sctx->isc_ntxd_default[i])); 5326 } 5327 } 5328 5329 static void 5330 _iflib_pre_assert(if_softc_ctx_t scctx) 5331 { 5332 5333 MPASS(scctx->isc_txrx->ift_txd_encap); 5334 MPASS(scctx->isc_txrx->ift_txd_flush); 5335 MPASS(scctx->isc_txrx->ift_txd_credits_update); 5336 MPASS(scctx->isc_txrx->ift_rxd_available); 5337 MPASS(scctx->isc_txrx->ift_rxd_pkt_get); 5338 MPASS(scctx->isc_txrx->ift_rxd_refill); 5339 MPASS(scctx->isc_txrx->ift_rxd_flush); 5340 } 5341 5342 static int 5343 iflib_register(if_ctx_t ctx) 5344 { 5345 if_shared_ctx_t sctx = ctx->ifc_sctx; 5346 driver_t *driver = sctx->isc_driver; 5347 device_t dev = ctx->ifc_dev; 5348 if_t ifp; 5349 5350 _iflib_assert(sctx); 5351 5352 CTX_LOCK_INIT(ctx); 5353 STATE_LOCK_INIT(ctx, device_get_nameunit(ctx->ifc_dev)); 5354 ifp = ctx->ifc_ifp = if_alloc(IFT_ETHER); 5355 if (ifp == NULL) { 5356 device_printf(dev, "can not allocate ifnet structure\n"); 5357 return (ENOMEM); 5358 } 5359 5360 /* 5361 * Initialize our context's device specific methods 5362 */ 5363 kobj_init((kobj_t) ctx, (kobj_class_t) driver); 5364 kobj_class_compile((kobj_class_t) driver); 5365 5366 if_initname(ifp, device_get_name(dev), device_get_unit(dev)); 5367 if_setsoftc(ifp, ctx); 5368 if_setdev(ifp, dev); 5369 if_setinitfn(ifp, iflib_if_init); 5370 if_setioctlfn(ifp, iflib_if_ioctl); 5371 #ifdef ALTQ 5372 if_setstartfn(ifp, iflib_altq_if_start); 5373 if_settransmitfn(ifp, iflib_altq_if_transmit); 5374 if_setsendqready(ifp); 5375 #else 5376 if_settransmitfn(ifp, iflib_if_transmit); 5377 #endif 5378 if_setqflushfn(ifp, iflib_if_qflush); 5379 if_setflags(ifp, IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST); 5380 5381 ctx->ifc_vlan_attach_event = 5382 EVENTHANDLER_REGISTER(vlan_config, iflib_vlan_register, ctx, 5383 EVENTHANDLER_PRI_FIRST); 5384 ctx->ifc_vlan_detach_event = 5385 EVENTHANDLER_REGISTER(vlan_unconfig, iflib_vlan_unregister, ctx, 5386 EVENTHANDLER_PRI_FIRST); 5387 5388 if ((sctx->isc_flags & IFLIB_DRIVER_MEDIA) == 0) { 5389 ctx->ifc_mediap = &ctx->ifc_media; 5390 ifmedia_init(ctx->ifc_mediap, IFM_IMASK, 5391 iflib_media_change, iflib_media_status); 5392 } 5393 return (0); 5394 } 5395 5396 static void 5397 iflib_unregister_vlan_handlers(if_ctx_t ctx) 5398 { 5399 /* Unregister VLAN events */ 5400 if (ctx->ifc_vlan_attach_event != NULL) { 5401 EVENTHANDLER_DEREGISTER(vlan_config, ctx->ifc_vlan_attach_event); 5402 ctx->ifc_vlan_attach_event = NULL; 5403 } 5404 if (ctx->ifc_vlan_detach_event != NULL) { 5405 EVENTHANDLER_DEREGISTER(vlan_unconfig, ctx->ifc_vlan_detach_event); 5406 ctx->ifc_vlan_detach_event = NULL; 5407 } 5408 5409 } 5410 5411 static void 5412 iflib_deregister(if_ctx_t ctx) 5413 { 5414 if_t ifp = ctx->ifc_ifp; 5415 5416 /* Remove all media */ 5417 ifmedia_removeall(&ctx->ifc_media); 5418 5419 /* Ensure that VLAN event handlers are unregistered */ 5420 iflib_unregister_vlan_handlers(ctx); 5421 5422 /* Release kobject reference */ 5423 kobj_delete((kobj_t) ctx, NULL); 5424 5425 /* Free the ifnet structure */ 5426 if_free(ifp); 5427 5428 STATE_LOCK_DESTROY(ctx); 5429 5430 /* ether_ifdetach calls if_qflush - lock must be destroy afterwards*/ 5431 CTX_LOCK_DESTROY(ctx); 5432 } 5433 5434 static int 5435 iflib_queues_alloc(if_ctx_t ctx) 5436 { 5437 if_shared_ctx_t sctx = ctx->ifc_sctx; 5438 if_softc_ctx_t scctx = &ctx->ifc_softc_ctx; 5439 device_t dev = ctx->ifc_dev; 5440 int nrxqsets = scctx->isc_nrxqsets; 5441 int ntxqsets = scctx->isc_ntxqsets; 5442 iflib_txq_t txq; 5443 iflib_rxq_t rxq; 5444 iflib_fl_t fl = NULL; 5445 int i, j, cpu, err, txconf, rxconf; 5446 iflib_dma_info_t ifdip; 5447 uint32_t *rxqsizes = scctx->isc_rxqsizes; 5448 uint32_t *txqsizes = scctx->isc_txqsizes; 5449 uint8_t nrxqs = sctx->isc_nrxqs; 5450 uint8_t ntxqs = sctx->isc_ntxqs; 5451 int nfree_lists = sctx->isc_nfl ? sctx->isc_nfl : 1; 5452 caddr_t *vaddrs; 5453 uint64_t *paddrs; 5454 5455 KASSERT(ntxqs > 0, ("number of queues per qset must be at least 1")); 5456 KASSERT(nrxqs > 0, ("number of queues per qset must be at least 1")); 5457 5458 /* Allocate the TX ring struct memory */ 5459 if (!(ctx->ifc_txqs = 5460 (iflib_txq_t) malloc(sizeof(struct iflib_txq) * 5461 ntxqsets, M_IFLIB, M_NOWAIT | M_ZERO))) { 5462 device_printf(dev, "Unable to allocate TX ring memory\n"); 5463 err = ENOMEM; 5464 goto fail; 5465 } 5466 5467 /* Now allocate the RX */ 5468 if (!(ctx->ifc_rxqs = 5469 (iflib_rxq_t) malloc(sizeof(struct iflib_rxq) * 5470 nrxqsets, M_IFLIB, M_NOWAIT | M_ZERO))) { 5471 device_printf(dev, "Unable to allocate RX ring memory\n"); 5472 err = ENOMEM; 5473 goto rx_fail; 5474 } 5475 5476 txq = ctx->ifc_txqs; 5477 rxq = ctx->ifc_rxqs; 5478 5479 /* 5480 * XXX handle allocation failure 5481 */ 5482 for (txconf = i = 0, cpu = CPU_FIRST(); i < ntxqsets; i++, txconf++, txq++, cpu = CPU_NEXT(cpu)) { 5483 /* Set up some basics */ 5484 5485 if ((ifdip = malloc(sizeof(struct iflib_dma_info) * ntxqs, 5486 M_IFLIB, M_NOWAIT | M_ZERO)) == NULL) { 5487 device_printf(dev, 5488 "Unable to allocate TX DMA info memory\n"); 5489 err = ENOMEM; 5490 goto err_tx_desc; 5491 } 5492 txq->ift_ifdi = ifdip; 5493 for (j = 0; j < ntxqs; j++, ifdip++) { 5494 if (iflib_dma_alloc(ctx, txqsizes[j], ifdip, 0)) { 5495 device_printf(dev, 5496 "Unable to allocate TX descriptors\n"); 5497 err = ENOMEM; 5498 goto err_tx_desc; 5499 } 5500 txq->ift_txd_size[j] = scctx->isc_txd_size[j]; 5501 bzero((void *)ifdip->idi_vaddr, txqsizes[j]); 5502 } 5503 txq->ift_ctx = ctx; 5504 txq->ift_id = i; 5505 if (sctx->isc_flags & IFLIB_HAS_TXCQ) { 5506 txq->ift_br_offset = 1; 5507 } else { 5508 txq->ift_br_offset = 0; 5509 } 5510 /* XXX fix this */ 5511 txq->ift_timer.c_cpu = cpu; 5512 5513 if (iflib_txsd_alloc(txq)) { 5514 device_printf(dev, "Critical Failure setting up TX buffers\n"); 5515 err = ENOMEM; 5516 goto err_tx_desc; 5517 } 5518 5519 /* Initialize the TX lock */ 5520 snprintf(txq->ift_mtx_name, MTX_NAME_LEN, "%s:TX(%d):callout", 5521 device_get_nameunit(dev), txq->ift_id); 5522 mtx_init(&txq->ift_mtx, txq->ift_mtx_name, NULL, MTX_DEF); 5523 callout_init_mtx(&txq->ift_timer, &txq->ift_mtx, 0); 5524 5525 err = ifmp_ring_alloc(&txq->ift_br, 2048, txq, iflib_txq_drain, 5526 iflib_txq_can_drain, M_IFLIB, M_WAITOK); 5527 if (err) { 5528 /* XXX free any allocated rings */ 5529 device_printf(dev, "Unable to allocate buf_ring\n"); 5530 goto err_tx_desc; 5531 } 5532 } 5533 5534 for (rxconf = i = 0; i < nrxqsets; i++, rxconf++, rxq++) { 5535 /* Set up some basics */ 5536 5537 if ((ifdip = malloc(sizeof(struct iflib_dma_info) * nrxqs, 5538 M_IFLIB, M_NOWAIT | M_ZERO)) == NULL) { 5539 device_printf(dev, 5540 "Unable to allocate RX DMA info memory\n"); 5541 err = ENOMEM; 5542 goto err_tx_desc; 5543 } 5544 5545 rxq->ifr_ifdi = ifdip; 5546 /* XXX this needs to be changed if #rx queues != #tx queues */ 5547 rxq->ifr_ntxqirq = 1; 5548 rxq->ifr_txqid[0] = i; 5549 for (j = 0; j < nrxqs; j++, ifdip++) { 5550 if (iflib_dma_alloc(ctx, rxqsizes[j], ifdip, 0)) { 5551 device_printf(dev, 5552 "Unable to allocate RX descriptors\n"); 5553 err = ENOMEM; 5554 goto err_tx_desc; 5555 } 5556 bzero((void *)ifdip->idi_vaddr, rxqsizes[j]); 5557 } 5558 rxq->ifr_ctx = ctx; 5559 rxq->ifr_id = i; 5560 if (sctx->isc_flags & IFLIB_HAS_RXCQ) { 5561 rxq->ifr_fl_offset = 1; 5562 } else { 5563 rxq->ifr_fl_offset = 0; 5564 } 5565 rxq->ifr_nfl = nfree_lists; 5566 if (!(fl = 5567 (iflib_fl_t) malloc(sizeof(struct iflib_fl) * nfree_lists, M_IFLIB, M_NOWAIT | M_ZERO))) { 5568 device_printf(dev, "Unable to allocate free list memory\n"); 5569 err = ENOMEM; 5570 goto err_tx_desc; 5571 } 5572 rxq->ifr_fl = fl; 5573 for (j = 0; j < nfree_lists; j++) { 5574 fl[j].ifl_rxq = rxq; 5575 fl[j].ifl_id = j; 5576 fl[j].ifl_ifdi = &rxq->ifr_ifdi[j + rxq->ifr_fl_offset]; 5577 fl[j].ifl_rxd_size = scctx->isc_rxd_size[j]; 5578 } 5579 /* Allocate receive buffers for the ring */ 5580 if (iflib_rxsd_alloc(rxq)) { 5581 device_printf(dev, 5582 "Critical Failure setting up receive buffers\n"); 5583 err = ENOMEM; 5584 goto err_rx_desc; 5585 } 5586 5587 for (j = 0, fl = rxq->ifr_fl; j < rxq->ifr_nfl; j++, fl++) 5588 fl->ifl_rx_bitmap = bit_alloc(fl->ifl_size, M_IFLIB, 5589 M_WAITOK); 5590 } 5591 5592 /* TXQs */ 5593 vaddrs = malloc(sizeof(caddr_t)*ntxqsets*ntxqs, M_IFLIB, M_WAITOK); 5594 paddrs = malloc(sizeof(uint64_t)*ntxqsets*ntxqs, M_IFLIB, M_WAITOK); 5595 for (i = 0; i < ntxqsets; i++) { 5596 iflib_dma_info_t di = ctx->ifc_txqs[i].ift_ifdi; 5597 5598 for (j = 0; j < ntxqs; j++, di++) { 5599 vaddrs[i*ntxqs + j] = di->idi_vaddr; 5600 paddrs[i*ntxqs + j] = di->idi_paddr; 5601 } 5602 } 5603 if ((err = IFDI_TX_QUEUES_ALLOC(ctx, vaddrs, paddrs, ntxqs, ntxqsets)) != 0) { 5604 device_printf(ctx->ifc_dev, 5605 "Unable to allocate device TX queue\n"); 5606 iflib_tx_structures_free(ctx); 5607 free(vaddrs, M_IFLIB); 5608 free(paddrs, M_IFLIB); 5609 goto err_rx_desc; 5610 } 5611 free(vaddrs, M_IFLIB); 5612 free(paddrs, M_IFLIB); 5613 5614 /* RXQs */ 5615 vaddrs = malloc(sizeof(caddr_t)*nrxqsets*nrxqs, M_IFLIB, M_WAITOK); 5616 paddrs = malloc(sizeof(uint64_t)*nrxqsets*nrxqs, M_IFLIB, M_WAITOK); 5617 for (i = 0; i < nrxqsets; i++) { 5618 iflib_dma_info_t di = ctx->ifc_rxqs[i].ifr_ifdi; 5619 5620 for (j = 0; j < nrxqs; j++, di++) { 5621 vaddrs[i*nrxqs + j] = di->idi_vaddr; 5622 paddrs[i*nrxqs + j] = di->idi_paddr; 5623 } 5624 } 5625 if ((err = IFDI_RX_QUEUES_ALLOC(ctx, vaddrs, paddrs, nrxqs, nrxqsets)) != 0) { 5626 device_printf(ctx->ifc_dev, 5627 "Unable to allocate device RX queue\n"); 5628 iflib_tx_structures_free(ctx); 5629 free(vaddrs, M_IFLIB); 5630 free(paddrs, M_IFLIB); 5631 goto err_rx_desc; 5632 } 5633 free(vaddrs, M_IFLIB); 5634 free(paddrs, M_IFLIB); 5635 5636 return (0); 5637 5638 /* XXX handle allocation failure changes */ 5639 err_rx_desc: 5640 err_tx_desc: 5641 rx_fail: 5642 if (ctx->ifc_rxqs != NULL) 5643 free(ctx->ifc_rxqs, M_IFLIB); 5644 ctx->ifc_rxqs = NULL; 5645 if (ctx->ifc_txqs != NULL) 5646 free(ctx->ifc_txqs, M_IFLIB); 5647 ctx->ifc_txqs = NULL; 5648 fail: 5649 return (err); 5650 } 5651 5652 static int 5653 iflib_tx_structures_setup(if_ctx_t ctx) 5654 { 5655 iflib_txq_t txq = ctx->ifc_txqs; 5656 int i; 5657 5658 for (i = 0; i < NTXQSETS(ctx); i++, txq++) 5659 iflib_txq_setup(txq); 5660 5661 return (0); 5662 } 5663 5664 static void 5665 iflib_tx_structures_free(if_ctx_t ctx) 5666 { 5667 iflib_txq_t txq = ctx->ifc_txqs; 5668 if_shared_ctx_t sctx = ctx->ifc_sctx; 5669 int i, j; 5670 5671 for (i = 0; i < NTXQSETS(ctx); i++, txq++) { 5672 for (j = 0; j < sctx->isc_ntxqs; j++) 5673 iflib_dma_free(&txq->ift_ifdi[j]); 5674 iflib_txq_destroy(txq); 5675 } 5676 free(ctx->ifc_txqs, M_IFLIB); 5677 ctx->ifc_txqs = NULL; 5678 IFDI_QUEUES_FREE(ctx); 5679 } 5680 5681 /********************************************************************* 5682 * 5683 * Initialize all receive rings. 5684 * 5685 **********************************************************************/ 5686 static int 5687 iflib_rx_structures_setup(if_ctx_t ctx) 5688 { 5689 iflib_rxq_t rxq = ctx->ifc_rxqs; 5690 int q; 5691 #if defined(INET6) || defined(INET) 5692 int err, i; 5693 #endif 5694 5695 for (q = 0; q < ctx->ifc_softc_ctx.isc_nrxqsets; q++, rxq++) { 5696 #if defined(INET6) || defined(INET) 5697 if (if_getcapabilities(ctx->ifc_ifp) & IFCAP_LRO) { 5698 err = tcp_lro_init_args(&rxq->ifr_lc, ctx->ifc_ifp, 5699 TCP_LRO_ENTRIES, min(1024, 5700 ctx->ifc_softc_ctx.isc_nrxd[rxq->ifr_fl_offset])); 5701 if (err != 0) { 5702 device_printf(ctx->ifc_dev, 5703 "LRO Initialization failed!\n"); 5704 goto fail; 5705 } 5706 } 5707 #endif 5708 IFDI_RXQ_SETUP(ctx, rxq->ifr_id); 5709 } 5710 return (0); 5711 #if defined(INET6) || defined(INET) 5712 fail: 5713 /* 5714 * Free LRO resources allocated so far, we will only handle 5715 * the rings that completed, the failing case will have 5716 * cleaned up for itself. 'q' failed, so its the terminus. 5717 */ 5718 rxq = ctx->ifc_rxqs; 5719 for (i = 0; i < q; ++i, rxq++) { 5720 if (if_getcapabilities(ctx->ifc_ifp) & IFCAP_LRO) 5721 tcp_lro_free(&rxq->ifr_lc); 5722 } 5723 return (err); 5724 #endif 5725 } 5726 5727 /********************************************************************* 5728 * 5729 * Free all receive rings. 5730 * 5731 **********************************************************************/ 5732 static void 5733 iflib_rx_structures_free(if_ctx_t ctx) 5734 { 5735 iflib_rxq_t rxq = ctx->ifc_rxqs; 5736 if_shared_ctx_t sctx = ctx->ifc_sctx; 5737 int i, j; 5738 5739 for (i = 0; i < ctx->ifc_softc_ctx.isc_nrxqsets; i++, rxq++) { 5740 for (j = 0; j < sctx->isc_nrxqs; j++) 5741 iflib_dma_free(&rxq->ifr_ifdi[j]); 5742 iflib_rx_sds_free(rxq); 5743 #if defined(INET6) || defined(INET) 5744 if (if_getcapabilities(ctx->ifc_ifp) & IFCAP_LRO) 5745 tcp_lro_free(&rxq->ifr_lc); 5746 #endif 5747 } 5748 free(ctx->ifc_rxqs, M_IFLIB); 5749 ctx->ifc_rxqs = NULL; 5750 } 5751 5752 static int 5753 iflib_qset_structures_setup(if_ctx_t ctx) 5754 { 5755 int err; 5756 5757 /* 5758 * It is expected that the caller takes care of freeing queues if this 5759 * fails. 5760 */ 5761 if ((err = iflib_tx_structures_setup(ctx)) != 0) { 5762 device_printf(ctx->ifc_dev, "iflib_tx_structures_setup failed: %d\n", err); 5763 return (err); 5764 } 5765 5766 if ((err = iflib_rx_structures_setup(ctx)) != 0) 5767 device_printf(ctx->ifc_dev, "iflib_rx_structures_setup failed: %d\n", err); 5768 5769 return (err); 5770 } 5771 5772 int 5773 iflib_irq_alloc(if_ctx_t ctx, if_irq_t irq, int rid, 5774 driver_filter_t filter, void *filter_arg, driver_intr_t handler, void *arg, const char *name) 5775 { 5776 5777 return (_iflib_irq_alloc(ctx, irq, rid, filter, handler, arg, name)); 5778 } 5779 5780 #ifdef SMP 5781 static int 5782 find_nth(if_ctx_t ctx, int qid) 5783 { 5784 cpuset_t cpus; 5785 int i, cpuid, eqid, count; 5786 5787 CPU_COPY(&ctx->ifc_cpus, &cpus); 5788 count = CPU_COUNT(&cpus); 5789 eqid = qid % count; 5790 /* clear up to the qid'th bit */ 5791 for (i = 0; i < eqid; i++) { 5792 cpuid = CPU_FFS(&cpus); 5793 MPASS(cpuid != 0); 5794 CPU_CLR(cpuid-1, &cpus); 5795 } 5796 cpuid = CPU_FFS(&cpus); 5797 MPASS(cpuid != 0); 5798 return (cpuid-1); 5799 } 5800 5801 #ifdef SCHED_ULE 5802 extern struct cpu_group *cpu_top; /* CPU topology */ 5803 5804 static int 5805 find_child_with_core(int cpu, struct cpu_group *grp) 5806 { 5807 int i; 5808 5809 if (grp->cg_children == 0) 5810 return -1; 5811 5812 MPASS(grp->cg_child); 5813 for (i = 0; i < grp->cg_children; i++) { 5814 if (CPU_ISSET(cpu, &grp->cg_child[i].cg_mask)) 5815 return i; 5816 } 5817 5818 return -1; 5819 } 5820 5821 /* 5822 * Find the nth "close" core to the specified core 5823 * "close" is defined as the deepest level that shares 5824 * at least an L2 cache. With threads, this will be 5825 * threads on the same core. If the shared cache is L3 5826 * or higher, simply returns the same core. 5827 */ 5828 static int 5829 find_close_core(int cpu, int core_offset) 5830 { 5831 struct cpu_group *grp; 5832 int i; 5833 int fcpu; 5834 cpuset_t cs; 5835 5836 grp = cpu_top; 5837 if (grp == NULL) 5838 return cpu; 5839 i = 0; 5840 while ((i = find_child_with_core(cpu, grp)) != -1) { 5841 /* If the child only has one cpu, don't descend */ 5842 if (grp->cg_child[i].cg_count <= 1) 5843 break; 5844 grp = &grp->cg_child[i]; 5845 } 5846 5847 /* If they don't share at least an L2 cache, use the same CPU */ 5848 if (grp->cg_level > CG_SHARE_L2 || grp->cg_level == CG_SHARE_NONE) 5849 return cpu; 5850 5851 /* Now pick one */ 5852 CPU_COPY(&grp->cg_mask, &cs); 5853 5854 /* Add the selected CPU offset to core offset. */ 5855 for (i = 0; (fcpu = CPU_FFS(&cs)) != 0; i++) { 5856 if (fcpu - 1 == cpu) 5857 break; 5858 CPU_CLR(fcpu - 1, &cs); 5859 } 5860 MPASS(fcpu); 5861 5862 core_offset += i; 5863 5864 CPU_COPY(&grp->cg_mask, &cs); 5865 for (i = core_offset % grp->cg_count; i > 0; i--) { 5866 MPASS(CPU_FFS(&cs)); 5867 CPU_CLR(CPU_FFS(&cs) - 1, &cs); 5868 } 5869 MPASS(CPU_FFS(&cs)); 5870 return CPU_FFS(&cs) - 1; 5871 } 5872 #else 5873 static int 5874 find_close_core(int cpu, int core_offset __unused) 5875 { 5876 return cpu; 5877 } 5878 #endif 5879 5880 static int 5881 get_core_offset(if_ctx_t ctx, iflib_intr_type_t type, int qid) 5882 { 5883 switch (type) { 5884 case IFLIB_INTR_TX: 5885 /* TX queues get cores which share at least an L2 cache with the corresponding RX queue */ 5886 /* XXX handle multiple RX threads per core and more than two core per L2 group */ 5887 return qid / CPU_COUNT(&ctx->ifc_cpus) + 1; 5888 case IFLIB_INTR_RX: 5889 case IFLIB_INTR_RXTX: 5890 /* RX queues get the specified core */ 5891 return qid / CPU_COUNT(&ctx->ifc_cpus); 5892 default: 5893 return -1; 5894 } 5895 } 5896 #else 5897 #define get_core_offset(ctx, type, qid) CPU_FIRST() 5898 #define find_close_core(cpuid, tid) CPU_FIRST() 5899 #define find_nth(ctx, gid) CPU_FIRST() 5900 #endif 5901 5902 /* Just to avoid copy/paste */ 5903 static inline int 5904 iflib_irq_set_affinity(if_ctx_t ctx, if_irq_t irq, iflib_intr_type_t type, 5905 int qid, struct grouptask *gtask, struct taskqgroup *tqg, void *uniq, 5906 const char *name) 5907 { 5908 device_t dev; 5909 int co, cpuid, err, tid; 5910 5911 dev = ctx->ifc_dev; 5912 co = ctx->ifc_sysctl_core_offset; 5913 if (ctx->ifc_sysctl_separate_txrx && type == IFLIB_INTR_TX) 5914 co += ctx->ifc_softc_ctx.isc_nrxqsets; 5915 cpuid = find_nth(ctx, qid + co); 5916 tid = get_core_offset(ctx, type, qid); 5917 if (tid < 0) { 5918 device_printf(dev, "get_core_offset failed\n"); 5919 return (EOPNOTSUPP); 5920 } 5921 cpuid = find_close_core(cpuid, tid); 5922 err = taskqgroup_attach_cpu(tqg, gtask, uniq, cpuid, dev, irq->ii_res, 5923 name); 5924 if (err) { 5925 device_printf(dev, "taskqgroup_attach_cpu failed %d\n", err); 5926 return (err); 5927 } 5928 #ifdef notyet 5929 if (cpuid > ctx->ifc_cpuid_highest) 5930 ctx->ifc_cpuid_highest = cpuid; 5931 #endif 5932 return (0); 5933 } 5934 5935 int 5936 iflib_irq_alloc_generic(if_ctx_t ctx, if_irq_t irq, int rid, 5937 iflib_intr_type_t type, driver_filter_t *filter, 5938 void *filter_arg, int qid, const char *name) 5939 { 5940 device_t dev; 5941 struct grouptask *gtask; 5942 struct taskqgroup *tqg; 5943 iflib_filter_info_t info; 5944 gtask_fn_t *fn; 5945 int tqrid, err; 5946 driver_filter_t *intr_fast; 5947 void *q; 5948 5949 info = &ctx->ifc_filter_info; 5950 tqrid = rid; 5951 5952 switch (type) { 5953 /* XXX merge tx/rx for netmap? */ 5954 case IFLIB_INTR_TX: 5955 q = &ctx->ifc_txqs[qid]; 5956 info = &ctx->ifc_txqs[qid].ift_filter_info; 5957 gtask = &ctx->ifc_txqs[qid].ift_task; 5958 tqg = qgroup_if_io_tqg; 5959 fn = _task_fn_tx; 5960 intr_fast = iflib_fast_intr; 5961 GROUPTASK_INIT(gtask, 0, fn, q); 5962 ctx->ifc_flags |= IFC_NETMAP_TX_IRQ; 5963 break; 5964 case IFLIB_INTR_RX: 5965 q = &ctx->ifc_rxqs[qid]; 5966 info = &ctx->ifc_rxqs[qid].ifr_filter_info; 5967 gtask = &ctx->ifc_rxqs[qid].ifr_task; 5968 tqg = qgroup_if_io_tqg; 5969 fn = _task_fn_rx; 5970 intr_fast = iflib_fast_intr; 5971 NET_GROUPTASK_INIT(gtask, 0, fn, q); 5972 break; 5973 case IFLIB_INTR_RXTX: 5974 q = &ctx->ifc_rxqs[qid]; 5975 info = &ctx->ifc_rxqs[qid].ifr_filter_info; 5976 gtask = &ctx->ifc_rxqs[qid].ifr_task; 5977 tqg = qgroup_if_io_tqg; 5978 fn = _task_fn_rx; 5979 intr_fast = iflib_fast_intr_rxtx; 5980 NET_GROUPTASK_INIT(gtask, 0, fn, q); 5981 break; 5982 case IFLIB_INTR_ADMIN: 5983 q = ctx; 5984 tqrid = -1; 5985 info = &ctx->ifc_filter_info; 5986 gtask = &ctx->ifc_admin_task; 5987 tqg = qgroup_if_config_tqg; 5988 fn = _task_fn_admin; 5989 intr_fast = iflib_fast_intr_ctx; 5990 break; 5991 default: 5992 device_printf(ctx->ifc_dev, "%s: unknown net intr type\n", 5993 __func__); 5994 return (EINVAL); 5995 } 5996 5997 info->ifi_filter = filter; 5998 info->ifi_filter_arg = filter_arg; 5999 info->ifi_task = gtask; 6000 info->ifi_ctx = q; 6001 6002 dev = ctx->ifc_dev; 6003 err = _iflib_irq_alloc(ctx, irq, rid, intr_fast, NULL, info, name); 6004 if (err != 0) { 6005 device_printf(dev, "_iflib_irq_alloc failed %d\n", err); 6006 return (err); 6007 } 6008 if (type == IFLIB_INTR_ADMIN) 6009 return (0); 6010 6011 if (tqrid != -1) { 6012 err = iflib_irq_set_affinity(ctx, irq, type, qid, gtask, tqg, 6013 q, name); 6014 if (err) 6015 return (err); 6016 } else { 6017 taskqgroup_attach(tqg, gtask, q, dev, irq->ii_res, name); 6018 } 6019 6020 return (0); 6021 } 6022 6023 void 6024 iflib_softirq_alloc_generic(if_ctx_t ctx, if_irq_t irq, iflib_intr_type_t type, void *arg, int qid, const char *name) 6025 { 6026 struct grouptask *gtask; 6027 struct taskqgroup *tqg; 6028 gtask_fn_t *fn; 6029 void *q; 6030 int err; 6031 6032 switch (type) { 6033 case IFLIB_INTR_TX: 6034 q = &ctx->ifc_txqs[qid]; 6035 gtask = &ctx->ifc_txqs[qid].ift_task; 6036 tqg = qgroup_if_io_tqg; 6037 fn = _task_fn_tx; 6038 break; 6039 case IFLIB_INTR_RX: 6040 q = &ctx->ifc_rxqs[qid]; 6041 gtask = &ctx->ifc_rxqs[qid].ifr_task; 6042 tqg = qgroup_if_io_tqg; 6043 fn = _task_fn_rx; 6044 break; 6045 case IFLIB_INTR_IOV: 6046 q = ctx; 6047 gtask = &ctx->ifc_vflr_task; 6048 tqg = qgroup_if_config_tqg; 6049 fn = _task_fn_iov; 6050 break; 6051 default: 6052 panic("unknown net intr type"); 6053 } 6054 GROUPTASK_INIT(gtask, 0, fn, q); 6055 if (irq != NULL) { 6056 err = iflib_irq_set_affinity(ctx, irq, type, qid, gtask, tqg, 6057 q, name); 6058 if (err) 6059 taskqgroup_attach(tqg, gtask, q, ctx->ifc_dev, 6060 irq->ii_res, name); 6061 } else { 6062 taskqgroup_attach(tqg, gtask, q, NULL, NULL, name); 6063 } 6064 } 6065 6066 void 6067 iflib_irq_free(if_ctx_t ctx, if_irq_t irq) 6068 { 6069 6070 if (irq->ii_tag) 6071 bus_teardown_intr(ctx->ifc_dev, irq->ii_res, irq->ii_tag); 6072 6073 if (irq->ii_res) 6074 bus_release_resource(ctx->ifc_dev, SYS_RES_IRQ, 6075 rman_get_rid(irq->ii_res), irq->ii_res); 6076 } 6077 6078 static int 6079 iflib_legacy_setup(if_ctx_t ctx, driver_filter_t filter, void *filter_arg, int *rid, const char *name) 6080 { 6081 iflib_txq_t txq = ctx->ifc_txqs; 6082 iflib_rxq_t rxq = ctx->ifc_rxqs; 6083 if_irq_t irq = &ctx->ifc_legacy_irq; 6084 iflib_filter_info_t info; 6085 device_t dev; 6086 struct grouptask *gtask; 6087 struct resource *res; 6088 struct taskqgroup *tqg; 6089 gtask_fn_t *fn; 6090 void *q; 6091 int err, tqrid; 6092 bool rx_only; 6093 6094 q = &ctx->ifc_rxqs[0]; 6095 info = &rxq[0].ifr_filter_info; 6096 gtask = &rxq[0].ifr_task; 6097 tqg = qgroup_if_io_tqg; 6098 tqrid = *rid; 6099 fn = _task_fn_rx; 6100 rx_only = (ctx->ifc_sctx->isc_flags & IFLIB_SINGLE_IRQ_RX_ONLY) != 0; 6101 6102 ctx->ifc_flags |= IFC_LEGACY; 6103 info->ifi_filter = filter; 6104 info->ifi_filter_arg = filter_arg; 6105 info->ifi_task = gtask; 6106 info->ifi_ctx = rx_only ? ctx : q; 6107 6108 dev = ctx->ifc_dev; 6109 /* We allocate a single interrupt resource */ 6110 err = _iflib_irq_alloc(ctx, irq, tqrid, rx_only ? iflib_fast_intr_ctx : 6111 iflib_fast_intr_rxtx, NULL, info, name); 6112 if (err != 0) 6113 return (err); 6114 GROUPTASK_INIT(gtask, 0, fn, q); 6115 res = irq->ii_res; 6116 taskqgroup_attach(tqg, gtask, q, dev, res, name); 6117 6118 GROUPTASK_INIT(&txq->ift_task, 0, _task_fn_tx, txq); 6119 taskqgroup_attach(qgroup_if_io_tqg, &txq->ift_task, txq, dev, res, 6120 "tx"); 6121 return (0); 6122 } 6123 6124 void 6125 iflib_led_create(if_ctx_t ctx) 6126 { 6127 6128 ctx->ifc_led_dev = led_create(iflib_led_func, ctx, 6129 device_get_nameunit(ctx->ifc_dev)); 6130 } 6131 6132 void 6133 iflib_tx_intr_deferred(if_ctx_t ctx, int txqid) 6134 { 6135 6136 GROUPTASK_ENQUEUE(&ctx->ifc_txqs[txqid].ift_task); 6137 } 6138 6139 void 6140 iflib_rx_intr_deferred(if_ctx_t ctx, int rxqid) 6141 { 6142 6143 GROUPTASK_ENQUEUE(&ctx->ifc_rxqs[rxqid].ifr_task); 6144 } 6145 6146 void 6147 iflib_admin_intr_deferred(if_ctx_t ctx) 6148 { 6149 #ifdef INVARIANTS 6150 struct grouptask *gtask; 6151 6152 gtask = &ctx->ifc_admin_task; 6153 MPASS(gtask != NULL && gtask->gt_taskqueue != NULL); 6154 #endif 6155 6156 GROUPTASK_ENQUEUE(&ctx->ifc_admin_task); 6157 } 6158 6159 void 6160 iflib_iov_intr_deferred(if_ctx_t ctx) 6161 { 6162 6163 GROUPTASK_ENQUEUE(&ctx->ifc_vflr_task); 6164 } 6165 6166 void 6167 iflib_io_tqg_attach(struct grouptask *gt, void *uniq, int cpu, const char *name) 6168 { 6169 6170 taskqgroup_attach_cpu(qgroup_if_io_tqg, gt, uniq, cpu, NULL, NULL, 6171 name); 6172 } 6173 6174 void 6175 iflib_config_gtask_init(void *ctx, struct grouptask *gtask, gtask_fn_t *fn, 6176 const char *name) 6177 { 6178 6179 GROUPTASK_INIT(gtask, 0, fn, ctx); 6180 taskqgroup_attach(qgroup_if_config_tqg, gtask, gtask, NULL, NULL, 6181 name); 6182 } 6183 6184 void 6185 iflib_config_gtask_deinit(struct grouptask *gtask) 6186 { 6187 6188 taskqgroup_detach(qgroup_if_config_tqg, gtask); 6189 } 6190 6191 void 6192 iflib_link_state_change(if_ctx_t ctx, int link_state, uint64_t baudrate) 6193 { 6194 if_t ifp = ctx->ifc_ifp; 6195 iflib_txq_t txq = ctx->ifc_txqs; 6196 6197 if_setbaudrate(ifp, baudrate); 6198 if (baudrate >= IF_Gbps(10)) { 6199 STATE_LOCK(ctx); 6200 ctx->ifc_flags |= IFC_PREFETCH; 6201 STATE_UNLOCK(ctx); 6202 } 6203 /* If link down, disable watchdog */ 6204 if ((ctx->ifc_link_state == LINK_STATE_UP) && (link_state == LINK_STATE_DOWN)) { 6205 for (int i = 0; i < ctx->ifc_softc_ctx.isc_ntxqsets; i++, txq++) 6206 txq->ift_qstatus = IFLIB_QUEUE_IDLE; 6207 } 6208 ctx->ifc_link_state = link_state; 6209 if_link_state_change(ifp, link_state); 6210 } 6211 6212 static int 6213 iflib_tx_credits_update(if_ctx_t ctx, iflib_txq_t txq) 6214 { 6215 int credits; 6216 #ifdef INVARIANTS 6217 int credits_pre = txq->ift_cidx_processed; 6218 #endif 6219 6220 bus_dmamap_sync(txq->ift_ifdi->idi_tag, txq->ift_ifdi->idi_map, 6221 BUS_DMASYNC_POSTREAD); 6222 if ((credits = ctx->isc_txd_credits_update(ctx->ifc_softc, txq->ift_id, true)) == 0) 6223 return (0); 6224 6225 txq->ift_processed += credits; 6226 txq->ift_cidx_processed += credits; 6227 6228 MPASS(credits_pre + credits == txq->ift_cidx_processed); 6229 if (txq->ift_cidx_processed >= txq->ift_size) 6230 txq->ift_cidx_processed -= txq->ift_size; 6231 return (credits); 6232 } 6233 6234 static int 6235 iflib_rxd_avail(if_ctx_t ctx, iflib_rxq_t rxq, qidx_t cidx, qidx_t budget) 6236 { 6237 iflib_fl_t fl; 6238 u_int i; 6239 6240 for (i = 0, fl = &rxq->ifr_fl[0]; i < rxq->ifr_nfl; i++, fl++) 6241 bus_dmamap_sync(fl->ifl_ifdi->idi_tag, fl->ifl_ifdi->idi_map, 6242 BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE); 6243 return (ctx->isc_rxd_available(ctx->ifc_softc, rxq->ifr_id, cidx, 6244 budget)); 6245 } 6246 6247 void 6248 iflib_add_int_delay_sysctl(if_ctx_t ctx, const char *name, 6249 const char *description, if_int_delay_info_t info, 6250 int offset, int value) 6251 { 6252 info->iidi_ctx = ctx; 6253 info->iidi_offset = offset; 6254 info->iidi_value = value; 6255 SYSCTL_ADD_PROC(device_get_sysctl_ctx(ctx->ifc_dev), 6256 SYSCTL_CHILDREN(device_get_sysctl_tree(ctx->ifc_dev)), 6257 OID_AUTO, name, CTLTYPE_INT|CTLFLAG_RW, 6258 info, 0, iflib_sysctl_int_delay, "I", description); 6259 } 6260 6261 struct sx * 6262 iflib_ctx_lock_get(if_ctx_t ctx) 6263 { 6264 6265 return (&ctx->ifc_ctx_sx); 6266 } 6267 6268 static int 6269 iflib_msix_init(if_ctx_t ctx) 6270 { 6271 device_t dev = ctx->ifc_dev; 6272 if_shared_ctx_t sctx = ctx->ifc_sctx; 6273 if_softc_ctx_t scctx = &ctx->ifc_softc_ctx; 6274 int admincnt, bar, err, iflib_num_rx_queues, iflib_num_tx_queues; 6275 int msgs, queuemsgs, queues, rx_queues, tx_queues, vectors; 6276 6277 iflib_num_tx_queues = ctx->ifc_sysctl_ntxqs; 6278 iflib_num_rx_queues = ctx->ifc_sysctl_nrxqs; 6279 6280 if (bootverbose) 6281 device_printf(dev, "msix_init qsets capped at %d\n", 6282 imax(scctx->isc_ntxqsets, scctx->isc_nrxqsets)); 6283 6284 /* Override by tuneable */ 6285 if (scctx->isc_disable_msix) 6286 goto msi; 6287 6288 /* First try MSI-X */ 6289 if ((msgs = pci_msix_count(dev)) == 0) { 6290 if (bootverbose) 6291 device_printf(dev, "MSI-X not supported or disabled\n"); 6292 goto msi; 6293 } 6294 6295 bar = ctx->ifc_softc_ctx.isc_msix_bar; 6296 /* 6297 * bar == -1 => "trust me I know what I'm doing" 6298 * Some drivers are for hardware that is so shoddily 6299 * documented that no one knows which bars are which 6300 * so the developer has to map all bars. This hack 6301 * allows shoddy garbage to use MSI-X in this framework. 6302 */ 6303 if (bar != -1) { 6304 ctx->ifc_msix_mem = bus_alloc_resource_any(dev, 6305 SYS_RES_MEMORY, &bar, RF_ACTIVE); 6306 if (ctx->ifc_msix_mem == NULL) { 6307 device_printf(dev, "Unable to map MSI-X table\n"); 6308 goto msi; 6309 } 6310 } 6311 6312 admincnt = sctx->isc_admin_intrcnt; 6313 #if IFLIB_DEBUG 6314 /* use only 1 qset in debug mode */ 6315 queuemsgs = min(msgs - admincnt, 1); 6316 #else 6317 queuemsgs = msgs - admincnt; 6318 #endif 6319 #ifdef RSS 6320 queues = imin(queuemsgs, rss_getnumbuckets()); 6321 #else 6322 queues = queuemsgs; 6323 #endif 6324 queues = imin(CPU_COUNT(&ctx->ifc_cpus), queues); 6325 if (bootverbose) 6326 device_printf(dev, 6327 "intr CPUs: %d queue msgs: %d admincnt: %d\n", 6328 CPU_COUNT(&ctx->ifc_cpus), queuemsgs, admincnt); 6329 #ifdef RSS 6330 /* If we're doing RSS, clamp at the number of RSS buckets */ 6331 if (queues > rss_getnumbuckets()) 6332 queues = rss_getnumbuckets(); 6333 #endif 6334 if (iflib_num_rx_queues > 0 && iflib_num_rx_queues < queuemsgs - admincnt) 6335 rx_queues = iflib_num_rx_queues; 6336 else 6337 rx_queues = queues; 6338 6339 if (rx_queues > scctx->isc_nrxqsets) 6340 rx_queues = scctx->isc_nrxqsets; 6341 6342 /* 6343 * We want this to be all logical CPUs by default 6344 */ 6345 if (iflib_num_tx_queues > 0 && iflib_num_tx_queues < queues) 6346 tx_queues = iflib_num_tx_queues; 6347 else 6348 tx_queues = mp_ncpus; 6349 6350 if (tx_queues > scctx->isc_ntxqsets) 6351 tx_queues = scctx->isc_ntxqsets; 6352 6353 if (ctx->ifc_sysctl_qs_eq_override == 0) { 6354 #ifdef INVARIANTS 6355 if (tx_queues != rx_queues) 6356 device_printf(dev, 6357 "queue equality override not set, capping rx_queues at %d and tx_queues at %d\n", 6358 min(rx_queues, tx_queues), min(rx_queues, tx_queues)); 6359 #endif 6360 tx_queues = min(rx_queues, tx_queues); 6361 rx_queues = min(rx_queues, tx_queues); 6362 } 6363 6364 vectors = rx_queues + admincnt; 6365 if (msgs < vectors) { 6366 device_printf(dev, 6367 "insufficient number of MSI-X vectors " 6368 "(supported %d, need %d)\n", msgs, vectors); 6369 goto msi; 6370 } 6371 6372 device_printf(dev, "Using %d RX queues %d TX queues\n", rx_queues, 6373 tx_queues); 6374 msgs = vectors; 6375 if ((err = pci_alloc_msix(dev, &vectors)) == 0) { 6376 if (vectors != msgs) { 6377 device_printf(dev, 6378 "Unable to allocate sufficient MSI-X vectors " 6379 "(got %d, need %d)\n", vectors, msgs); 6380 pci_release_msi(dev); 6381 if (bar != -1) { 6382 bus_release_resource(dev, SYS_RES_MEMORY, bar, 6383 ctx->ifc_msix_mem); 6384 ctx->ifc_msix_mem = NULL; 6385 } 6386 goto msi; 6387 } 6388 device_printf(dev, "Using MSI-X interrupts with %d vectors\n", 6389 vectors); 6390 scctx->isc_vectors = vectors; 6391 scctx->isc_nrxqsets = rx_queues; 6392 scctx->isc_ntxqsets = tx_queues; 6393 scctx->isc_intr = IFLIB_INTR_MSIX; 6394 6395 return (vectors); 6396 } else { 6397 device_printf(dev, 6398 "failed to allocate %d MSI-X vectors, err: %d\n", vectors, 6399 err); 6400 if (bar != -1) { 6401 bus_release_resource(dev, SYS_RES_MEMORY, bar, 6402 ctx->ifc_msix_mem); 6403 ctx->ifc_msix_mem = NULL; 6404 } 6405 } 6406 6407 msi: 6408 vectors = pci_msi_count(dev); 6409 scctx->isc_nrxqsets = 1; 6410 scctx->isc_ntxqsets = 1; 6411 scctx->isc_vectors = vectors; 6412 if (vectors == 1 && pci_alloc_msi(dev, &vectors) == 0) { 6413 device_printf(dev,"Using an MSI interrupt\n"); 6414 scctx->isc_intr = IFLIB_INTR_MSI; 6415 } else { 6416 scctx->isc_vectors = 1; 6417 device_printf(dev,"Using a Legacy interrupt\n"); 6418 scctx->isc_intr = IFLIB_INTR_LEGACY; 6419 } 6420 6421 return (vectors); 6422 } 6423 6424 static const char *ring_states[] = { "IDLE", "BUSY", "STALLED", "ABDICATED" }; 6425 6426 static int 6427 mp_ring_state_handler(SYSCTL_HANDLER_ARGS) 6428 { 6429 int rc; 6430 uint16_t *state = ((uint16_t *)oidp->oid_arg1); 6431 struct sbuf *sb; 6432 const char *ring_state = "UNKNOWN"; 6433 6434 /* XXX needed ? */ 6435 rc = sysctl_wire_old_buffer(req, 0); 6436 MPASS(rc == 0); 6437 if (rc != 0) 6438 return (rc); 6439 sb = sbuf_new_for_sysctl(NULL, NULL, 80, req); 6440 MPASS(sb != NULL); 6441 if (sb == NULL) 6442 return (ENOMEM); 6443 if (state[3] <= 3) 6444 ring_state = ring_states[state[3]]; 6445 6446 sbuf_printf(sb, "pidx_head: %04hd pidx_tail: %04hd cidx: %04hd state: %s", 6447 state[0], state[1], state[2], ring_state); 6448 rc = sbuf_finish(sb); 6449 sbuf_delete(sb); 6450 return(rc); 6451 } 6452 6453 enum iflib_ndesc_handler { 6454 IFLIB_NTXD_HANDLER, 6455 IFLIB_NRXD_HANDLER, 6456 }; 6457 6458 static int 6459 mp_ndesc_handler(SYSCTL_HANDLER_ARGS) 6460 { 6461 if_ctx_t ctx = (void *)arg1; 6462 enum iflib_ndesc_handler type = arg2; 6463 char buf[256] = {0}; 6464 qidx_t *ndesc; 6465 char *p, *next; 6466 int nqs, rc, i; 6467 6468 nqs = 8; 6469 switch(type) { 6470 case IFLIB_NTXD_HANDLER: 6471 ndesc = ctx->ifc_sysctl_ntxds; 6472 if (ctx->ifc_sctx) 6473 nqs = ctx->ifc_sctx->isc_ntxqs; 6474 break; 6475 case IFLIB_NRXD_HANDLER: 6476 ndesc = ctx->ifc_sysctl_nrxds; 6477 if (ctx->ifc_sctx) 6478 nqs = ctx->ifc_sctx->isc_nrxqs; 6479 break; 6480 default: 6481 printf("%s: unhandled type\n", __func__); 6482 return (EINVAL); 6483 } 6484 if (nqs == 0) 6485 nqs = 8; 6486 6487 for (i=0; i<8; i++) { 6488 if (i >= nqs) 6489 break; 6490 if (i) 6491 strcat(buf, ","); 6492 sprintf(strchr(buf, 0), "%d", ndesc[i]); 6493 } 6494 6495 rc = sysctl_handle_string(oidp, buf, sizeof(buf), req); 6496 if (rc || req->newptr == NULL) 6497 return rc; 6498 6499 for (i = 0, next = buf, p = strsep(&next, " ,"); i < 8 && p; 6500 i++, p = strsep(&next, " ,")) { 6501 ndesc[i] = strtoul(p, NULL, 10); 6502 } 6503 6504 return(rc); 6505 } 6506 6507 #define NAME_BUFLEN 32 6508 static void 6509 iflib_add_device_sysctl_pre(if_ctx_t ctx) 6510 { 6511 device_t dev = iflib_get_dev(ctx); 6512 struct sysctl_oid_list *child, *oid_list; 6513 struct sysctl_ctx_list *ctx_list; 6514 struct sysctl_oid *node; 6515 6516 ctx_list = device_get_sysctl_ctx(dev); 6517 child = SYSCTL_CHILDREN(device_get_sysctl_tree(dev)); 6518 ctx->ifc_sysctl_node = node = SYSCTL_ADD_NODE(ctx_list, child, OID_AUTO, "iflib", 6519 CTLFLAG_RD, NULL, "IFLIB fields"); 6520 oid_list = SYSCTL_CHILDREN(node); 6521 6522 SYSCTL_ADD_CONST_STRING(ctx_list, oid_list, OID_AUTO, "driver_version", 6523 CTLFLAG_RD, ctx->ifc_sctx->isc_driver_version, 6524 "driver version"); 6525 6526 SYSCTL_ADD_U16(ctx_list, oid_list, OID_AUTO, "override_ntxqs", 6527 CTLFLAG_RWTUN, &ctx->ifc_sysctl_ntxqs, 0, 6528 "# of txqs to use, 0 => use default #"); 6529 SYSCTL_ADD_U16(ctx_list, oid_list, OID_AUTO, "override_nrxqs", 6530 CTLFLAG_RWTUN, &ctx->ifc_sysctl_nrxqs, 0, 6531 "# of rxqs to use, 0 => use default #"); 6532 SYSCTL_ADD_U16(ctx_list, oid_list, OID_AUTO, "override_qs_enable", 6533 CTLFLAG_RWTUN, &ctx->ifc_sysctl_qs_eq_override, 0, 6534 "permit #txq != #rxq"); 6535 SYSCTL_ADD_INT(ctx_list, oid_list, OID_AUTO, "disable_msix", 6536 CTLFLAG_RWTUN, &ctx->ifc_softc_ctx.isc_disable_msix, 0, 6537 "disable MSI-X (default 0)"); 6538 SYSCTL_ADD_U16(ctx_list, oid_list, OID_AUTO, "rx_budget", 6539 CTLFLAG_RWTUN, &ctx->ifc_sysctl_rx_budget, 0, 6540 "set the RX budget"); 6541 SYSCTL_ADD_U16(ctx_list, oid_list, OID_AUTO, "tx_abdicate", 6542 CTLFLAG_RWTUN, &ctx->ifc_sysctl_tx_abdicate, 0, 6543 "cause TX to abdicate instead of running to completion"); 6544 ctx->ifc_sysctl_core_offset = CORE_OFFSET_UNSPECIFIED; 6545 SYSCTL_ADD_U16(ctx_list, oid_list, OID_AUTO, "core_offset", 6546 CTLFLAG_RDTUN, &ctx->ifc_sysctl_core_offset, 0, 6547 "offset to start using cores at"); 6548 SYSCTL_ADD_U8(ctx_list, oid_list, OID_AUTO, "separate_txrx", 6549 CTLFLAG_RDTUN, &ctx->ifc_sysctl_separate_txrx, 0, 6550 "use separate cores for TX and RX"); 6551 6552 /* XXX change for per-queue sizes */ 6553 SYSCTL_ADD_PROC(ctx_list, oid_list, OID_AUTO, "override_ntxds", 6554 CTLTYPE_STRING|CTLFLAG_RWTUN, ctx, IFLIB_NTXD_HANDLER, 6555 mp_ndesc_handler, "A", 6556 "list of # of TX descriptors to use, 0 = use default #"); 6557 SYSCTL_ADD_PROC(ctx_list, oid_list, OID_AUTO, "override_nrxds", 6558 CTLTYPE_STRING|CTLFLAG_RWTUN, ctx, IFLIB_NRXD_HANDLER, 6559 mp_ndesc_handler, "A", 6560 "list of # of RX descriptors to use, 0 = use default #"); 6561 } 6562 6563 static void 6564 iflib_add_device_sysctl_post(if_ctx_t ctx) 6565 { 6566 if_shared_ctx_t sctx = ctx->ifc_sctx; 6567 if_softc_ctx_t scctx = &ctx->ifc_softc_ctx; 6568 device_t dev = iflib_get_dev(ctx); 6569 struct sysctl_oid_list *child; 6570 struct sysctl_ctx_list *ctx_list; 6571 iflib_fl_t fl; 6572 iflib_txq_t txq; 6573 iflib_rxq_t rxq; 6574 int i, j; 6575 char namebuf[NAME_BUFLEN]; 6576 char *qfmt; 6577 struct sysctl_oid *queue_node, *fl_node, *node; 6578 struct sysctl_oid_list *queue_list, *fl_list; 6579 ctx_list = device_get_sysctl_ctx(dev); 6580 6581 node = ctx->ifc_sysctl_node; 6582 child = SYSCTL_CHILDREN(node); 6583 6584 if (scctx->isc_ntxqsets > 100) 6585 qfmt = "txq%03d"; 6586 else if (scctx->isc_ntxqsets > 10) 6587 qfmt = "txq%02d"; 6588 else 6589 qfmt = "txq%d"; 6590 for (i = 0, txq = ctx->ifc_txqs; i < scctx->isc_ntxqsets; i++, txq++) { 6591 snprintf(namebuf, NAME_BUFLEN, qfmt, i); 6592 queue_node = SYSCTL_ADD_NODE(ctx_list, child, OID_AUTO, namebuf, 6593 CTLFLAG_RD, NULL, "Queue Name"); 6594 queue_list = SYSCTL_CHILDREN(queue_node); 6595 #if MEMORY_LOGGING 6596 SYSCTL_ADD_QUAD(ctx_list, queue_list, OID_AUTO, "txq_dequeued", 6597 CTLFLAG_RD, 6598 &txq->ift_dequeued, "total mbufs freed"); 6599 SYSCTL_ADD_QUAD(ctx_list, queue_list, OID_AUTO, "txq_enqueued", 6600 CTLFLAG_RD, 6601 &txq->ift_enqueued, "total mbufs enqueued"); 6602 #endif 6603 SYSCTL_ADD_QUAD(ctx_list, queue_list, OID_AUTO, "mbuf_defrag", 6604 CTLFLAG_RD, 6605 &txq->ift_mbuf_defrag, "# of times m_defrag was called"); 6606 SYSCTL_ADD_QUAD(ctx_list, queue_list, OID_AUTO, "m_pullups", 6607 CTLFLAG_RD, 6608 &txq->ift_pullups, "# of times m_pullup was called"); 6609 SYSCTL_ADD_QUAD(ctx_list, queue_list, OID_AUTO, "mbuf_defrag_failed", 6610 CTLFLAG_RD, 6611 &txq->ift_mbuf_defrag_failed, "# of times m_defrag failed"); 6612 SYSCTL_ADD_QUAD(ctx_list, queue_list, OID_AUTO, "no_desc_avail", 6613 CTLFLAG_RD, 6614 &txq->ift_no_desc_avail, "# of times no descriptors were available"); 6615 SYSCTL_ADD_QUAD(ctx_list, queue_list, OID_AUTO, "tx_map_failed", 6616 CTLFLAG_RD, 6617 &txq->ift_map_failed, "# of times DMA map failed"); 6618 SYSCTL_ADD_QUAD(ctx_list, queue_list, OID_AUTO, "txd_encap_efbig", 6619 CTLFLAG_RD, 6620 &txq->ift_txd_encap_efbig, "# of times txd_encap returned EFBIG"); 6621 SYSCTL_ADD_QUAD(ctx_list, queue_list, OID_AUTO, "no_tx_dma_setup", 6622 CTLFLAG_RD, 6623 &txq->ift_no_tx_dma_setup, "# of times map failed for other than EFBIG"); 6624 SYSCTL_ADD_U16(ctx_list, queue_list, OID_AUTO, "txq_pidx", 6625 CTLFLAG_RD, 6626 &txq->ift_pidx, 1, "Producer Index"); 6627 SYSCTL_ADD_U16(ctx_list, queue_list, OID_AUTO, "txq_cidx", 6628 CTLFLAG_RD, 6629 &txq->ift_cidx, 1, "Consumer Index"); 6630 SYSCTL_ADD_U16(ctx_list, queue_list, OID_AUTO, "txq_cidx_processed", 6631 CTLFLAG_RD, 6632 &txq->ift_cidx_processed, 1, "Consumer Index seen by credit update"); 6633 SYSCTL_ADD_U16(ctx_list, queue_list, OID_AUTO, "txq_in_use", 6634 CTLFLAG_RD, 6635 &txq->ift_in_use, 1, "descriptors in use"); 6636 SYSCTL_ADD_QUAD(ctx_list, queue_list, OID_AUTO, "txq_processed", 6637 CTLFLAG_RD, 6638 &txq->ift_processed, "descriptors procesed for clean"); 6639 SYSCTL_ADD_QUAD(ctx_list, queue_list, OID_AUTO, "txq_cleaned", 6640 CTLFLAG_RD, 6641 &txq->ift_cleaned, "total cleaned"); 6642 SYSCTL_ADD_PROC(ctx_list, queue_list, OID_AUTO, "ring_state", 6643 CTLTYPE_STRING | CTLFLAG_RD, __DEVOLATILE(uint64_t *, &txq->ift_br->state), 6644 0, mp_ring_state_handler, "A", "soft ring state"); 6645 SYSCTL_ADD_COUNTER_U64(ctx_list, queue_list, OID_AUTO, "r_enqueues", 6646 CTLFLAG_RD, &txq->ift_br->enqueues, 6647 "# of enqueues to the mp_ring for this queue"); 6648 SYSCTL_ADD_COUNTER_U64(ctx_list, queue_list, OID_AUTO, "r_drops", 6649 CTLFLAG_RD, &txq->ift_br->drops, 6650 "# of drops in the mp_ring for this queue"); 6651 SYSCTL_ADD_COUNTER_U64(ctx_list, queue_list, OID_AUTO, "r_starts", 6652 CTLFLAG_RD, &txq->ift_br->starts, 6653 "# of normal consumer starts in the mp_ring for this queue"); 6654 SYSCTL_ADD_COUNTER_U64(ctx_list, queue_list, OID_AUTO, "r_stalls", 6655 CTLFLAG_RD, &txq->ift_br->stalls, 6656 "# of consumer stalls in the mp_ring for this queue"); 6657 SYSCTL_ADD_COUNTER_U64(ctx_list, queue_list, OID_AUTO, "r_restarts", 6658 CTLFLAG_RD, &txq->ift_br->restarts, 6659 "# of consumer restarts in the mp_ring for this queue"); 6660 SYSCTL_ADD_COUNTER_U64(ctx_list, queue_list, OID_AUTO, "r_abdications", 6661 CTLFLAG_RD, &txq->ift_br->abdications, 6662 "# of consumer abdications in the mp_ring for this queue"); 6663 } 6664 6665 if (scctx->isc_nrxqsets > 100) 6666 qfmt = "rxq%03d"; 6667 else if (scctx->isc_nrxqsets > 10) 6668 qfmt = "rxq%02d"; 6669 else 6670 qfmt = "rxq%d"; 6671 for (i = 0, rxq = ctx->ifc_rxqs; i < scctx->isc_nrxqsets; i++, rxq++) { 6672 snprintf(namebuf, NAME_BUFLEN, qfmt, i); 6673 queue_node = SYSCTL_ADD_NODE(ctx_list, child, OID_AUTO, namebuf, 6674 CTLFLAG_RD, NULL, "Queue Name"); 6675 queue_list = SYSCTL_CHILDREN(queue_node); 6676 if (sctx->isc_flags & IFLIB_HAS_RXCQ) { 6677 SYSCTL_ADD_U16(ctx_list, queue_list, OID_AUTO, "rxq_cq_cidx", 6678 CTLFLAG_RD, 6679 &rxq->ifr_cq_cidx, 1, "Consumer Index"); 6680 } 6681 6682 for (j = 0, fl = rxq->ifr_fl; j < rxq->ifr_nfl; j++, fl++) { 6683 snprintf(namebuf, NAME_BUFLEN, "rxq_fl%d", j); 6684 fl_node = SYSCTL_ADD_NODE(ctx_list, queue_list, OID_AUTO, namebuf, 6685 CTLFLAG_RD, NULL, "freelist Name"); 6686 fl_list = SYSCTL_CHILDREN(fl_node); 6687 SYSCTL_ADD_U16(ctx_list, fl_list, OID_AUTO, "pidx", 6688 CTLFLAG_RD, 6689 &fl->ifl_pidx, 1, "Producer Index"); 6690 SYSCTL_ADD_U16(ctx_list, fl_list, OID_AUTO, "cidx", 6691 CTLFLAG_RD, 6692 &fl->ifl_cidx, 1, "Consumer Index"); 6693 SYSCTL_ADD_U16(ctx_list, fl_list, OID_AUTO, "credits", 6694 CTLFLAG_RD, 6695 &fl->ifl_credits, 1, "credits available"); 6696 #if MEMORY_LOGGING 6697 SYSCTL_ADD_QUAD(ctx_list, fl_list, OID_AUTO, "fl_m_enqueued", 6698 CTLFLAG_RD, 6699 &fl->ifl_m_enqueued, "mbufs allocated"); 6700 SYSCTL_ADD_QUAD(ctx_list, fl_list, OID_AUTO, "fl_m_dequeued", 6701 CTLFLAG_RD, 6702 &fl->ifl_m_dequeued, "mbufs freed"); 6703 SYSCTL_ADD_QUAD(ctx_list, fl_list, OID_AUTO, "fl_cl_enqueued", 6704 CTLFLAG_RD, 6705 &fl->ifl_cl_enqueued, "clusters allocated"); 6706 SYSCTL_ADD_QUAD(ctx_list, fl_list, OID_AUTO, "fl_cl_dequeued", 6707 CTLFLAG_RD, 6708 &fl->ifl_cl_dequeued, "clusters freed"); 6709 #endif 6710 6711 } 6712 } 6713 6714 } 6715 6716 void 6717 iflib_request_reset(if_ctx_t ctx) 6718 { 6719 6720 STATE_LOCK(ctx); 6721 ctx->ifc_flags |= IFC_DO_RESET; 6722 STATE_UNLOCK(ctx); 6723 } 6724 6725 #ifndef __NO_STRICT_ALIGNMENT 6726 static struct mbuf * 6727 iflib_fixup_rx(struct mbuf *m) 6728 { 6729 struct mbuf *n; 6730 6731 if (m->m_len <= (MCLBYTES - ETHER_HDR_LEN)) { 6732 bcopy(m->m_data, m->m_data + ETHER_HDR_LEN, m->m_len); 6733 m->m_data += ETHER_HDR_LEN; 6734 n = m; 6735 } else { 6736 MGETHDR(n, M_NOWAIT, MT_DATA); 6737 if (n == NULL) { 6738 m_freem(m); 6739 return (NULL); 6740 } 6741 bcopy(m->m_data, n->m_data, ETHER_HDR_LEN); 6742 m->m_data += ETHER_HDR_LEN; 6743 m->m_len -= ETHER_HDR_LEN; 6744 n->m_len = ETHER_HDR_LEN; 6745 M_MOVE_PKTHDR(n, m); 6746 n->m_next = m; 6747 } 6748 return (n); 6749 } 6750 #endif 6751 6752 #ifdef DEBUGNET 6753 static void 6754 iflib_debugnet_init(if_t ifp, int *nrxr, int *ncl, int *clsize) 6755 { 6756 if_ctx_t ctx; 6757 6758 ctx = if_getsoftc(ifp); 6759 CTX_LOCK(ctx); 6760 *nrxr = NRXQSETS(ctx); 6761 *ncl = ctx->ifc_rxqs[0].ifr_fl->ifl_size; 6762 *clsize = ctx->ifc_rxqs[0].ifr_fl->ifl_buf_size; 6763 CTX_UNLOCK(ctx); 6764 } 6765 6766 static void 6767 iflib_debugnet_event(if_t ifp, enum debugnet_ev event) 6768 { 6769 if_ctx_t ctx; 6770 if_softc_ctx_t scctx; 6771 iflib_fl_t fl; 6772 iflib_rxq_t rxq; 6773 int i, j; 6774 6775 ctx = if_getsoftc(ifp); 6776 scctx = &ctx->ifc_softc_ctx; 6777 6778 switch (event) { 6779 case DEBUGNET_START: 6780 for (i = 0; i < scctx->isc_nrxqsets; i++) { 6781 rxq = &ctx->ifc_rxqs[i]; 6782 for (j = 0; j < rxq->ifr_nfl; j++) { 6783 fl = rxq->ifr_fl; 6784 fl->ifl_zone = m_getzone(fl->ifl_buf_size); 6785 } 6786 } 6787 iflib_no_tx_batch = 1; 6788 break; 6789 default: 6790 break; 6791 } 6792 } 6793 6794 static int 6795 iflib_debugnet_transmit(if_t ifp, struct mbuf *m) 6796 { 6797 if_ctx_t ctx; 6798 iflib_txq_t txq; 6799 int error; 6800 6801 ctx = if_getsoftc(ifp); 6802 if ((if_getdrvflags(ifp) & (IFF_DRV_RUNNING | IFF_DRV_OACTIVE)) != 6803 IFF_DRV_RUNNING) 6804 return (EBUSY); 6805 6806 txq = &ctx->ifc_txqs[0]; 6807 error = iflib_encap(txq, &m); 6808 if (error == 0) 6809 (void)iflib_txd_db_check(ctx, txq, true, txq->ift_in_use); 6810 return (error); 6811 } 6812 6813 static int 6814 iflib_debugnet_poll(if_t ifp, int count) 6815 { 6816 struct epoch_tracker et; 6817 if_ctx_t ctx; 6818 if_softc_ctx_t scctx; 6819 iflib_txq_t txq; 6820 int i; 6821 6822 ctx = if_getsoftc(ifp); 6823 scctx = &ctx->ifc_softc_ctx; 6824 6825 if ((if_getdrvflags(ifp) & (IFF_DRV_RUNNING | IFF_DRV_OACTIVE)) != 6826 IFF_DRV_RUNNING) 6827 return (EBUSY); 6828 6829 txq = &ctx->ifc_txqs[0]; 6830 (void)iflib_completed_tx_reclaim(txq, RECLAIM_THRESH(ctx)); 6831 6832 NET_EPOCH_ENTER(et); 6833 for (i = 0; i < scctx->isc_nrxqsets; i++) 6834 (void)iflib_rxeof(&ctx->ifc_rxqs[i], 16 /* XXX */); 6835 NET_EPOCH_EXIT(et); 6836 return (0); 6837 } 6838 #endif /* DEBUGNET */ 6839