1 /*- 2 * Copyright (c) 2010-2016 Solarflare Communications Inc. 3 * All rights reserved. 4 * 5 * This software was developed in part by Philip Paeps under contract for 6 * Solarflare Communications, Inc. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions are met: 10 * 11 * 1. Redistributions of source code must retain the above copyright notice, 12 * this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright notice, 14 * this list of conditions and the following disclaimer in the documentation 15 * and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 18 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 19 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 20 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR 21 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 22 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 23 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 24 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 25 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 26 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, 27 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 * 29 * The views and conclusions contained in the software and documentation are 30 * those of the authors and should not be interpreted as representing official 31 * policies, either expressed or implied, of the FreeBSD Project. 32 */ 33 34 #include <sys/cdefs.h> 35 __FBSDID("$FreeBSD$"); 36 37 #include "opt_rss.h" 38 39 #include <sys/param.h> 40 #include <sys/malloc.h> 41 #include <sys/mbuf.h> 42 #include <sys/smp.h> 43 #include <sys/socket.h> 44 #include <sys/sysctl.h> 45 #include <sys/syslog.h> 46 #include <sys/limits.h> 47 #include <sys/syslog.h> 48 49 #include <net/ethernet.h> 50 #include <net/if.h> 51 #include <net/if_vlan_var.h> 52 53 #include <netinet/in.h> 54 #include <netinet/ip.h> 55 #include <netinet/ip6.h> 56 #include <netinet/tcp.h> 57 58 #include <machine/in_cksum.h> 59 60 #ifdef RSS 61 #include <net/rss_config.h> 62 #endif 63 64 #include "common/efx.h" 65 66 67 #include "sfxge.h" 68 #include "sfxge_rx.h" 69 70 #define RX_REFILL_THRESHOLD(_entries) (EFX_RXQ_LIMIT(_entries) * 9 / 10) 71 72 #ifdef SFXGE_LRO 73 74 SYSCTL_NODE(_hw_sfxge, OID_AUTO, lro, CTLFLAG_RD, NULL, 75 "Large receive offload (LRO) parameters"); 76 77 #define SFXGE_LRO_PARAM(_param) SFXGE_PARAM(lro._param) 78 79 /* Size of the LRO hash table. Must be a power of 2. A larger table 80 * means we can accelerate a larger number of streams. 81 */ 82 static unsigned lro_table_size = 128; 83 TUNABLE_INT(SFXGE_LRO_PARAM(table_size), &lro_table_size); 84 SYSCTL_UINT(_hw_sfxge_lro, OID_AUTO, table_size, CTLFLAG_RDTUN, 85 &lro_table_size, 0, 86 "Size of the LRO hash table (must be a power of 2)"); 87 88 /* Maximum length of a hash chain. If chains get too long then the lookup 89 * time increases and may exceed the benefit of LRO. 90 */ 91 static unsigned lro_chain_max = 20; 92 TUNABLE_INT(SFXGE_LRO_PARAM(chain_max), &lro_chain_max); 93 SYSCTL_UINT(_hw_sfxge_lro, OID_AUTO, chain_max, CTLFLAG_RDTUN, 94 &lro_chain_max, 0, 95 "The maximum length of a hash chain"); 96 97 /* Maximum time (in ticks) that a connection can be idle before it's LRO 98 * state is discarded. 99 */ 100 static unsigned lro_idle_ticks; /* initialised in sfxge_rx_init() */ 101 TUNABLE_INT(SFXGE_LRO_PARAM(idle_ticks), &lro_idle_ticks); 102 SYSCTL_UINT(_hw_sfxge_lro, OID_AUTO, idle_ticks, CTLFLAG_RDTUN, 103 &lro_idle_ticks, 0, 104 "The maximum time (in ticks) that a connection can be idle " 105 "before it's LRO state is discarded"); 106 107 /* Number of packets with payload that must arrive in-order before a 108 * connection is eligible for LRO. The idea is we should avoid coalescing 109 * segments when the sender is in slow-start because reducing the ACK rate 110 * can damage performance. 111 */ 112 static int lro_slow_start_packets = 2000; 113 TUNABLE_INT(SFXGE_LRO_PARAM(slow_start_packets), &lro_slow_start_packets); 114 SYSCTL_UINT(_hw_sfxge_lro, OID_AUTO, slow_start_packets, CTLFLAG_RDTUN, 115 &lro_slow_start_packets, 0, 116 "Number of packets with payload that must arrive in-order before " 117 "a connection is eligible for LRO"); 118 119 /* Number of packets with payload that must arrive in-order following loss 120 * before a connection is eligible for LRO. The idea is we should avoid 121 * coalescing segments when the sender is recovering from loss, because 122 * reducing the ACK rate can damage performance. 123 */ 124 static int lro_loss_packets = 20; 125 TUNABLE_INT(SFXGE_LRO_PARAM(loss_packets), &lro_loss_packets); 126 SYSCTL_UINT(_hw_sfxge_lro, OID_AUTO, loss_packets, CTLFLAG_RDTUN, 127 &lro_loss_packets, 0, 128 "Number of packets with payload that must arrive in-order " 129 "following loss before a connection is eligible for LRO"); 130 131 /* Flags for sfxge_lro_conn::l2_id; must not collide with EVL_VLID_MASK */ 132 #define SFXGE_LRO_L2_ID_VLAN 0x4000 133 #define SFXGE_LRO_L2_ID_IPV6 0x8000 134 #define SFXGE_LRO_CONN_IS_VLAN_ENCAP(c) ((c)->l2_id & SFXGE_LRO_L2_ID_VLAN) 135 #define SFXGE_LRO_CONN_IS_TCPIPV4(c) (!((c)->l2_id & SFXGE_LRO_L2_ID_IPV6)) 136 137 /* Compare IPv6 addresses, avoiding conditional branches */ 138 static unsigned long ipv6_addr_cmp(const struct in6_addr *left, 139 const struct in6_addr *right) 140 { 141 #if LONG_BIT == 64 142 const uint64_t *left64 = (const uint64_t *)left; 143 const uint64_t *right64 = (const uint64_t *)right; 144 return (left64[0] - right64[0]) | (left64[1] - right64[1]); 145 #else 146 return (left->s6_addr32[0] - right->s6_addr32[0]) | 147 (left->s6_addr32[1] - right->s6_addr32[1]) | 148 (left->s6_addr32[2] - right->s6_addr32[2]) | 149 (left->s6_addr32[3] - right->s6_addr32[3]); 150 #endif 151 } 152 153 #endif /* SFXGE_LRO */ 154 155 void 156 sfxge_rx_qflush_done(struct sfxge_rxq *rxq) 157 { 158 159 rxq->flush_state = SFXGE_FLUSH_DONE; 160 } 161 162 void 163 sfxge_rx_qflush_failed(struct sfxge_rxq *rxq) 164 { 165 166 rxq->flush_state = SFXGE_FLUSH_FAILED; 167 } 168 169 #ifdef RSS 170 static uint8_t toep_key[RSS_KEYSIZE]; 171 #else 172 static uint8_t toep_key[] = { 173 0x6d, 0x5a, 0x56, 0xda, 0x25, 0x5b, 0x0e, 0xc2, 174 0x41, 0x67, 0x25, 0x3d, 0x43, 0xa3, 0x8f, 0xb0, 175 0xd0, 0xca, 0x2b, 0xcb, 0xae, 0x7b, 0x30, 0xb4, 176 0x77, 0xcb, 0x2d, 0xa3, 0x80, 0x30, 0xf2, 0x0c, 177 0x6a, 0x42, 0xb7, 0x3b, 0xbe, 0xac, 0x01, 0xfa 178 }; 179 #endif 180 181 static void 182 sfxge_rx_post_refill(void *arg) 183 { 184 struct sfxge_rxq *rxq = arg; 185 struct sfxge_softc *sc; 186 unsigned int index; 187 struct sfxge_evq *evq; 188 uint16_t magic; 189 190 sc = rxq->sc; 191 index = rxq->index; 192 evq = sc->evq[index]; 193 magic = sfxge_sw_ev_rxq_magic(SFXGE_SW_EV_RX_QREFILL, rxq); 194 195 /* This is guaranteed due to the start/stop order of rx and ev */ 196 KASSERT(evq->init_state == SFXGE_EVQ_STARTED, 197 ("evq not started")); 198 KASSERT(rxq->init_state == SFXGE_RXQ_STARTED, 199 ("rxq not started")); 200 efx_ev_qpost(evq->common, magic); 201 } 202 203 static void 204 sfxge_rx_schedule_refill(struct sfxge_rxq *rxq, boolean_t retrying) 205 { 206 /* Initially retry after 100 ms, but back off in case of 207 * repeated failures as we probably have to wait for the 208 * administrator to raise the pool limit. */ 209 if (retrying) 210 rxq->refill_delay = min(rxq->refill_delay * 2, 10 * hz); 211 else 212 rxq->refill_delay = hz / 10; 213 214 callout_reset_curcpu(&rxq->refill_callout, rxq->refill_delay, 215 sfxge_rx_post_refill, rxq); 216 } 217 218 #define SFXGE_REFILL_BATCH 64 219 220 static void 221 sfxge_rx_qfill(struct sfxge_rxq *rxq, unsigned int target, boolean_t retrying) 222 { 223 struct sfxge_softc *sc; 224 unsigned int index; 225 struct sfxge_evq *evq; 226 unsigned int batch; 227 unsigned int rxfill; 228 unsigned int mblksize; 229 int ntodo; 230 efsys_dma_addr_t addr[SFXGE_REFILL_BATCH]; 231 232 sc = rxq->sc; 233 index = rxq->index; 234 evq = sc->evq[index]; 235 236 prefetch_read_many(sc->enp); 237 prefetch_read_many(rxq->common); 238 239 SFXGE_EVQ_LOCK_ASSERT_OWNED(evq); 240 241 if (__predict_false(rxq->init_state != SFXGE_RXQ_STARTED)) 242 return; 243 244 rxfill = rxq->added - rxq->completed; 245 KASSERT(rxfill <= EFX_RXQ_LIMIT(rxq->entries), 246 ("rxfill > EFX_RXQ_LIMIT(rxq->entries)")); 247 ntodo = min(EFX_RXQ_LIMIT(rxq->entries) - rxfill, target); 248 KASSERT(ntodo <= EFX_RXQ_LIMIT(rxq->entries), 249 ("ntodo > EFX_RQX_LIMIT(rxq->entries)")); 250 251 if (ntodo == 0) 252 return; 253 254 batch = 0; 255 mblksize = sc->rx_buffer_size - sc->rx_buffer_align; 256 while (ntodo-- > 0) { 257 unsigned int id; 258 struct sfxge_rx_sw_desc *rx_desc; 259 bus_dma_segment_t seg; 260 struct mbuf *m; 261 262 id = (rxq->added + batch) & rxq->ptr_mask; 263 rx_desc = &rxq->queue[id]; 264 KASSERT(rx_desc->mbuf == NULL, ("rx_desc->mbuf != NULL")); 265 266 rx_desc->flags = EFX_DISCARD; 267 m = rx_desc->mbuf = m_getjcl(M_NOWAIT, MT_DATA, M_PKTHDR, 268 sc->rx_cluster_size); 269 if (m == NULL) 270 break; 271 272 /* m_len specifies length of area to be mapped for DMA */ 273 m->m_len = mblksize; 274 m->m_data = (caddr_t)P2ROUNDUP((uintptr_t)m->m_data, CACHE_LINE_SIZE); 275 m->m_data += sc->rx_buffer_align; 276 277 sfxge_map_mbuf_fast(rxq->mem.esm_tag, rxq->mem.esm_map, m, &seg); 278 addr[batch++] = seg.ds_addr; 279 280 if (batch == SFXGE_REFILL_BATCH) { 281 efx_rx_qpost(rxq->common, addr, mblksize, batch, 282 rxq->completed, rxq->added); 283 rxq->added += batch; 284 batch = 0; 285 } 286 } 287 288 if (ntodo != 0) 289 sfxge_rx_schedule_refill(rxq, retrying); 290 291 if (batch != 0) { 292 efx_rx_qpost(rxq->common, addr, mblksize, batch, 293 rxq->completed, rxq->added); 294 rxq->added += batch; 295 } 296 297 /* Make the descriptors visible to the hardware */ 298 bus_dmamap_sync(rxq->mem.esm_tag, rxq->mem.esm_map, 299 BUS_DMASYNC_PREWRITE); 300 301 efx_rx_qpush(rxq->common, rxq->added, &rxq->pushed); 302 303 /* The queue could still be empty if no descriptors were actually 304 * pushed, in which case there will be no event to cause the next 305 * refill, so we must schedule a refill ourselves. 306 */ 307 if(rxq->pushed == rxq->completed) { 308 sfxge_rx_schedule_refill(rxq, retrying); 309 } 310 } 311 312 void 313 sfxge_rx_qrefill(struct sfxge_rxq *rxq) 314 { 315 316 if (__predict_false(rxq->init_state != SFXGE_RXQ_STARTED)) 317 return; 318 319 /* Make sure the queue is full */ 320 sfxge_rx_qfill(rxq, EFX_RXQ_LIMIT(rxq->entries), B_TRUE); 321 } 322 323 static void __sfxge_rx_deliver(struct sfxge_softc *sc, struct mbuf *m) 324 { 325 struct ifnet *ifp = sc->ifnet; 326 327 m->m_pkthdr.rcvif = ifp; 328 m->m_pkthdr.csum_data = 0xffff; 329 ifp->if_input(ifp, m); 330 } 331 332 static void 333 sfxge_rx_deliver(struct sfxge_rxq *rxq, struct sfxge_rx_sw_desc *rx_desc) 334 { 335 struct sfxge_softc *sc = rxq->sc; 336 struct mbuf *m = rx_desc->mbuf; 337 int flags = rx_desc->flags; 338 int csum_flags; 339 340 /* Convert checksum flags */ 341 csum_flags = (flags & EFX_CKSUM_IPV4) ? 342 (CSUM_IP_CHECKED | CSUM_IP_VALID) : 0; 343 if (flags & EFX_CKSUM_TCPUDP) 344 csum_flags |= CSUM_DATA_VALID | CSUM_PSEUDO_HDR; 345 346 if (flags & (EFX_PKT_IPV4 | EFX_PKT_IPV6)) { 347 m->m_pkthdr.flowid = 348 efx_pseudo_hdr_hash_get(rxq->common, 349 EFX_RX_HASHALG_TOEPLITZ, 350 mtod(m, uint8_t *)); 351 /* The hash covers a 4-tuple for TCP only */ 352 M_HASHTYPE_SET(m, 353 (flags & EFX_PKT_IPV4) ? 354 ((flags & EFX_PKT_TCP) ? 355 M_HASHTYPE_RSS_TCP_IPV4 : M_HASHTYPE_RSS_IPV4) : 356 ((flags & EFX_PKT_TCP) ? 357 M_HASHTYPE_RSS_TCP_IPV6 : M_HASHTYPE_RSS_IPV6)); 358 } 359 m->m_data += sc->rx_prefix_size; 360 m->m_len = rx_desc->size - sc->rx_prefix_size; 361 m->m_pkthdr.len = m->m_len; 362 m->m_pkthdr.csum_flags = csum_flags; 363 __sfxge_rx_deliver(sc, rx_desc->mbuf); 364 365 rx_desc->flags = EFX_DISCARD; 366 rx_desc->mbuf = NULL; 367 } 368 369 #ifdef SFXGE_LRO 370 371 static void 372 sfxge_lro_deliver(struct sfxge_lro_state *st, struct sfxge_lro_conn *c) 373 { 374 struct sfxge_softc *sc = st->sc; 375 struct mbuf *m = c->mbuf; 376 struct tcphdr *c_th; 377 int csum_flags; 378 379 KASSERT(m, ("no mbuf to deliver")); 380 381 ++st->n_bursts; 382 383 /* Finish off packet munging and recalculate IP header checksum. */ 384 if (SFXGE_LRO_CONN_IS_TCPIPV4(c)) { 385 struct ip *iph = c->nh; 386 iph->ip_len = htons(iph->ip_len); 387 iph->ip_sum = 0; 388 iph->ip_sum = in_cksum_hdr(iph); 389 c_th = (struct tcphdr *)(iph + 1); 390 csum_flags = (CSUM_DATA_VALID | CSUM_PSEUDO_HDR | 391 CSUM_IP_CHECKED | CSUM_IP_VALID); 392 } else { 393 struct ip6_hdr *iph = c->nh; 394 iph->ip6_plen = htons(iph->ip6_plen); 395 c_th = (struct tcphdr *)(iph + 1); 396 csum_flags = CSUM_DATA_VALID | CSUM_PSEUDO_HDR; 397 } 398 399 c_th->th_win = c->th_last->th_win; 400 c_th->th_ack = c->th_last->th_ack; 401 if (c_th->th_off == c->th_last->th_off) { 402 /* Copy TCP options (take care to avoid going negative). */ 403 int optlen = ((c_th->th_off - 5) & 0xf) << 2u; 404 memcpy(c_th + 1, c->th_last + 1, optlen); 405 } 406 407 m->m_pkthdr.flowid = c->conn_hash; 408 M_HASHTYPE_SET(m, 409 SFXGE_LRO_CONN_IS_TCPIPV4(c) ? 410 M_HASHTYPE_RSS_TCP_IPV4 : M_HASHTYPE_RSS_TCP_IPV6); 411 412 m->m_pkthdr.csum_flags = csum_flags; 413 __sfxge_rx_deliver(sc, m); 414 415 c->mbuf = NULL; 416 c->delivered = 1; 417 } 418 419 /* Drop the given connection, and add it to the free list. */ 420 static void sfxge_lro_drop(struct sfxge_rxq *rxq, struct sfxge_lro_conn *c) 421 { 422 unsigned bucket; 423 424 KASSERT(!c->mbuf, ("found orphaned mbuf")); 425 426 if (c->next_buf.mbuf != NULL) { 427 sfxge_rx_deliver(rxq, &c->next_buf); 428 LIST_REMOVE(c, active_link); 429 } 430 431 bucket = c->conn_hash & rxq->lro.conns_mask; 432 KASSERT(rxq->lro.conns_n[bucket] > 0, ("LRO: bucket fill level wrong")); 433 --rxq->lro.conns_n[bucket]; 434 TAILQ_REMOVE(&rxq->lro.conns[bucket], c, link); 435 TAILQ_INSERT_HEAD(&rxq->lro.free_conns, c, link); 436 } 437 438 /* Stop tracking connections that have gone idle in order to keep hash 439 * chains short. 440 */ 441 static void sfxge_lro_purge_idle(struct sfxge_rxq *rxq, unsigned now) 442 { 443 struct sfxge_lro_conn *c; 444 unsigned i; 445 446 KASSERT(LIST_EMPTY(&rxq->lro.active_conns), 447 ("found active connections")); 448 449 rxq->lro.last_purge_ticks = now; 450 for (i = 0; i <= rxq->lro.conns_mask; ++i) { 451 if (TAILQ_EMPTY(&rxq->lro.conns[i])) 452 continue; 453 454 c = TAILQ_LAST(&rxq->lro.conns[i], sfxge_lro_tailq); 455 if (now - c->last_pkt_ticks > lro_idle_ticks) { 456 ++rxq->lro.n_drop_idle; 457 sfxge_lro_drop(rxq, c); 458 } 459 } 460 } 461 462 static void 463 sfxge_lro_merge(struct sfxge_lro_state *st, struct sfxge_lro_conn *c, 464 struct mbuf *mbuf, struct tcphdr *th) 465 { 466 struct tcphdr *c_th; 467 468 /* Tack the new mbuf onto the chain. */ 469 KASSERT(!mbuf->m_next, ("mbuf already chained")); 470 c->mbuf_tail->m_next = mbuf; 471 c->mbuf_tail = mbuf; 472 473 /* Increase length appropriately */ 474 c->mbuf->m_pkthdr.len += mbuf->m_len; 475 476 /* Update the connection state flags */ 477 if (SFXGE_LRO_CONN_IS_TCPIPV4(c)) { 478 struct ip *iph = c->nh; 479 iph->ip_len += mbuf->m_len; 480 c_th = (struct tcphdr *)(iph + 1); 481 } else { 482 struct ip6_hdr *iph = c->nh; 483 iph->ip6_plen += mbuf->m_len; 484 c_th = (struct tcphdr *)(iph + 1); 485 } 486 c_th->th_flags |= (th->th_flags & TH_PUSH); 487 c->th_last = th; 488 ++st->n_merges; 489 490 /* Pass packet up now if another segment could overflow the IP 491 * length. 492 */ 493 if (c->mbuf->m_pkthdr.len > 65536 - 9200) 494 sfxge_lro_deliver(st, c); 495 } 496 497 static void 498 sfxge_lro_start(struct sfxge_lro_state *st, struct sfxge_lro_conn *c, 499 struct mbuf *mbuf, void *nh, struct tcphdr *th) 500 { 501 /* Start the chain */ 502 c->mbuf = mbuf; 503 c->mbuf_tail = c->mbuf; 504 c->nh = nh; 505 c->th_last = th; 506 507 mbuf->m_pkthdr.len = mbuf->m_len; 508 509 /* Mangle header fields for later processing */ 510 if (SFXGE_LRO_CONN_IS_TCPIPV4(c)) { 511 struct ip *iph = nh; 512 iph->ip_len = ntohs(iph->ip_len); 513 } else { 514 struct ip6_hdr *iph = nh; 515 iph->ip6_plen = ntohs(iph->ip6_plen); 516 } 517 } 518 519 /* Try to merge or otherwise hold or deliver (as appropriate) the 520 * packet buffered for this connection (c->next_buf). Return a flag 521 * indicating whether the connection is still active for LRO purposes. 522 */ 523 static int 524 sfxge_lro_try_merge(struct sfxge_rxq *rxq, struct sfxge_lro_conn *c) 525 { 526 struct sfxge_rx_sw_desc *rx_buf = &c->next_buf; 527 char *eh = c->next_eh; 528 int data_length, hdr_length, dont_merge; 529 unsigned th_seq, pkt_length; 530 struct tcphdr *th; 531 unsigned now; 532 533 if (SFXGE_LRO_CONN_IS_TCPIPV4(c)) { 534 struct ip *iph = c->next_nh; 535 th = (struct tcphdr *)(iph + 1); 536 pkt_length = ntohs(iph->ip_len) + (char *) iph - eh; 537 } else { 538 struct ip6_hdr *iph = c->next_nh; 539 th = (struct tcphdr *)(iph + 1); 540 pkt_length = ntohs(iph->ip6_plen) + (char *) th - eh; 541 } 542 543 hdr_length = (char *) th + th->th_off * 4 - eh; 544 data_length = (min(pkt_length, rx_buf->size - rxq->sc->rx_prefix_size) - 545 hdr_length); 546 th_seq = ntohl(th->th_seq); 547 dont_merge = ((data_length <= 0) 548 | (th->th_flags & (TH_URG | TH_SYN | TH_RST | TH_FIN))); 549 550 /* Check for options other than aligned timestamp. */ 551 if (th->th_off != 5) { 552 const uint32_t *opt_ptr = (const uint32_t *) (th + 1); 553 if (th->th_off == 8 && 554 opt_ptr[0] == ntohl((TCPOPT_NOP << 24) | 555 (TCPOPT_NOP << 16) | 556 (TCPOPT_TIMESTAMP << 8) | 557 TCPOLEN_TIMESTAMP)) { 558 /* timestamp option -- okay */ 559 } else { 560 dont_merge = 1; 561 } 562 } 563 564 if (__predict_false(th_seq != c->next_seq)) { 565 /* Out-of-order, so start counting again. */ 566 if (c->mbuf != NULL) 567 sfxge_lro_deliver(&rxq->lro, c); 568 c->n_in_order_pkts -= lro_loss_packets; 569 c->next_seq = th_seq + data_length; 570 ++rxq->lro.n_misorder; 571 goto deliver_buf_out; 572 } 573 c->next_seq = th_seq + data_length; 574 575 now = ticks; 576 if (now - c->last_pkt_ticks > lro_idle_ticks) { 577 ++rxq->lro.n_drop_idle; 578 if (c->mbuf != NULL) 579 sfxge_lro_deliver(&rxq->lro, c); 580 sfxge_lro_drop(rxq, c); 581 return (0); 582 } 583 c->last_pkt_ticks = ticks; 584 585 if (c->n_in_order_pkts < lro_slow_start_packets) { 586 /* May be in slow-start, so don't merge. */ 587 ++rxq->lro.n_slow_start; 588 ++c->n_in_order_pkts; 589 goto deliver_buf_out; 590 } 591 592 if (__predict_false(dont_merge)) { 593 if (c->mbuf != NULL) 594 sfxge_lro_deliver(&rxq->lro, c); 595 if (th->th_flags & (TH_FIN | TH_RST)) { 596 ++rxq->lro.n_drop_closed; 597 sfxge_lro_drop(rxq, c); 598 return (0); 599 } 600 goto deliver_buf_out; 601 } 602 603 rx_buf->mbuf->m_data += rxq->sc->rx_prefix_size; 604 605 if (__predict_true(c->mbuf != NULL)) { 606 /* Remove headers and any padding */ 607 rx_buf->mbuf->m_data += hdr_length; 608 rx_buf->mbuf->m_len = data_length; 609 610 sfxge_lro_merge(&rxq->lro, c, rx_buf->mbuf, th); 611 } else { 612 /* Remove any padding */ 613 rx_buf->mbuf->m_len = pkt_length; 614 615 sfxge_lro_start(&rxq->lro, c, rx_buf->mbuf, c->next_nh, th); 616 } 617 618 rx_buf->mbuf = NULL; 619 return (1); 620 621 deliver_buf_out: 622 sfxge_rx_deliver(rxq, rx_buf); 623 return (1); 624 } 625 626 static void sfxge_lro_new_conn(struct sfxge_lro_state *st, uint32_t conn_hash, 627 uint16_t l2_id, void *nh, struct tcphdr *th) 628 { 629 unsigned bucket = conn_hash & st->conns_mask; 630 struct sfxge_lro_conn *c; 631 632 if (st->conns_n[bucket] >= lro_chain_max) { 633 ++st->n_too_many; 634 return; 635 } 636 637 if (!TAILQ_EMPTY(&st->free_conns)) { 638 c = TAILQ_FIRST(&st->free_conns); 639 TAILQ_REMOVE(&st->free_conns, c, link); 640 } else { 641 c = malloc(sizeof(*c), M_SFXGE, M_NOWAIT); 642 if (c == NULL) 643 return; 644 c->mbuf = NULL; 645 c->next_buf.mbuf = NULL; 646 } 647 648 /* Create the connection tracking data */ 649 ++st->conns_n[bucket]; 650 TAILQ_INSERT_HEAD(&st->conns[bucket], c, link); 651 c->l2_id = l2_id; 652 c->conn_hash = conn_hash; 653 c->source = th->th_sport; 654 c->dest = th->th_dport; 655 c->n_in_order_pkts = 0; 656 c->last_pkt_ticks = *(volatile int *)&ticks; 657 c->delivered = 0; 658 ++st->n_new_stream; 659 /* NB. We don't initialise c->next_seq, and it doesn't matter what 660 * value it has. Most likely the next packet received for this 661 * connection will not match -- no harm done. 662 */ 663 } 664 665 /* Process mbuf and decide whether to dispatch it to the stack now or 666 * later. 667 */ 668 static void 669 sfxge_lro(struct sfxge_rxq *rxq, struct sfxge_rx_sw_desc *rx_buf) 670 { 671 struct sfxge_softc *sc = rxq->sc; 672 struct mbuf *m = rx_buf->mbuf; 673 struct ether_header *eh; 674 struct sfxge_lro_conn *c; 675 uint16_t l2_id; 676 uint16_t l3_proto; 677 void *nh; 678 struct tcphdr *th; 679 uint32_t conn_hash; 680 unsigned bucket; 681 682 /* Get the hardware hash */ 683 conn_hash = efx_pseudo_hdr_hash_get(rxq->common, 684 EFX_RX_HASHALG_TOEPLITZ, 685 mtod(m, uint8_t *)); 686 687 eh = (struct ether_header *)(m->m_data + sc->rx_prefix_size); 688 if (eh->ether_type == htons(ETHERTYPE_VLAN)) { 689 struct ether_vlan_header *veh = (struct ether_vlan_header *)eh; 690 l2_id = EVL_VLANOFTAG(ntohs(veh->evl_tag)) | 691 SFXGE_LRO_L2_ID_VLAN; 692 l3_proto = veh->evl_proto; 693 nh = veh + 1; 694 } else { 695 l2_id = 0; 696 l3_proto = eh->ether_type; 697 nh = eh + 1; 698 } 699 700 /* Check whether this is a suitable packet (unfragmented 701 * TCP/IPv4 or TCP/IPv6). If so, find the TCP header and 702 * length, and compute a hash if necessary. If not, return. 703 */ 704 if (l3_proto == htons(ETHERTYPE_IP)) { 705 struct ip *iph = nh; 706 707 KASSERT(iph->ip_p == IPPROTO_TCP, 708 ("IPv4 protocol is not TCP, but packet marker is set")); 709 if ((iph->ip_hl - (sizeof(*iph) >> 2u)) | 710 (iph->ip_off & htons(IP_MF | IP_OFFMASK))) 711 goto deliver_now; 712 th = (struct tcphdr *)(iph + 1); 713 } else if (l3_proto == htons(ETHERTYPE_IPV6)) { 714 struct ip6_hdr *iph = nh; 715 716 KASSERT(iph->ip6_nxt == IPPROTO_TCP, 717 ("IPv6 next header is not TCP, but packet marker is set")); 718 l2_id |= SFXGE_LRO_L2_ID_IPV6; 719 th = (struct tcphdr *)(iph + 1); 720 } else { 721 goto deliver_now; 722 } 723 724 bucket = conn_hash & rxq->lro.conns_mask; 725 726 TAILQ_FOREACH(c, &rxq->lro.conns[bucket], link) { 727 if ((c->l2_id - l2_id) | (c->conn_hash - conn_hash)) 728 continue; 729 if ((c->source - th->th_sport) | (c->dest - th->th_dport)) 730 continue; 731 if (c->mbuf != NULL) { 732 if (SFXGE_LRO_CONN_IS_TCPIPV4(c)) { 733 struct ip *c_iph, *iph = nh; 734 c_iph = c->nh; 735 if ((c_iph->ip_src.s_addr - iph->ip_src.s_addr) | 736 (c_iph->ip_dst.s_addr - iph->ip_dst.s_addr)) 737 continue; 738 } else { 739 struct ip6_hdr *c_iph, *iph = nh; 740 c_iph = c->nh; 741 if (ipv6_addr_cmp(&c_iph->ip6_src, &iph->ip6_src) | 742 ipv6_addr_cmp(&c_iph->ip6_dst, &iph->ip6_dst)) 743 continue; 744 } 745 } 746 747 /* Re-insert at head of list to reduce lookup time. */ 748 TAILQ_REMOVE(&rxq->lro.conns[bucket], c, link); 749 TAILQ_INSERT_HEAD(&rxq->lro.conns[bucket], c, link); 750 751 if (c->next_buf.mbuf != NULL) { 752 if (!sfxge_lro_try_merge(rxq, c)) 753 goto deliver_now; 754 } else { 755 LIST_INSERT_HEAD(&rxq->lro.active_conns, c, 756 active_link); 757 } 758 c->next_buf = *rx_buf; 759 c->next_eh = eh; 760 c->next_nh = nh; 761 762 rx_buf->mbuf = NULL; 763 rx_buf->flags = EFX_DISCARD; 764 return; 765 } 766 767 sfxge_lro_new_conn(&rxq->lro, conn_hash, l2_id, nh, th); 768 deliver_now: 769 sfxge_rx_deliver(rxq, rx_buf); 770 } 771 772 static void sfxge_lro_end_of_burst(struct sfxge_rxq *rxq) 773 { 774 struct sfxge_lro_state *st = &rxq->lro; 775 struct sfxge_lro_conn *c; 776 unsigned t; 777 778 while (!LIST_EMPTY(&st->active_conns)) { 779 c = LIST_FIRST(&st->active_conns); 780 if (!c->delivered && c->mbuf != NULL) 781 sfxge_lro_deliver(st, c); 782 if (sfxge_lro_try_merge(rxq, c)) { 783 if (c->mbuf != NULL) 784 sfxge_lro_deliver(st, c); 785 LIST_REMOVE(c, active_link); 786 } 787 c->delivered = 0; 788 } 789 790 t = *(volatile int *)&ticks; 791 if (__predict_false(t != st->last_purge_ticks)) 792 sfxge_lro_purge_idle(rxq, t); 793 } 794 795 #else /* !SFXGE_LRO */ 796 797 static void 798 sfxge_lro(struct sfxge_rxq *rxq, struct sfxge_rx_sw_desc *rx_buf) 799 { 800 } 801 802 static void 803 sfxge_lro_end_of_burst(struct sfxge_rxq *rxq) 804 { 805 } 806 807 #endif /* SFXGE_LRO */ 808 809 void 810 sfxge_rx_qcomplete(struct sfxge_rxq *rxq, boolean_t eop) 811 { 812 struct sfxge_softc *sc = rxq->sc; 813 int if_capenable = sc->ifnet->if_capenable; 814 int lro_enabled = if_capenable & IFCAP_LRO; 815 unsigned int index; 816 struct sfxge_evq *evq; 817 unsigned int completed; 818 unsigned int level; 819 struct mbuf *m; 820 struct sfxge_rx_sw_desc *prev = NULL; 821 822 index = rxq->index; 823 evq = sc->evq[index]; 824 825 SFXGE_EVQ_LOCK_ASSERT_OWNED(evq); 826 827 completed = rxq->completed; 828 while (completed != rxq->pending) { 829 unsigned int id; 830 struct sfxge_rx_sw_desc *rx_desc; 831 832 id = completed++ & rxq->ptr_mask; 833 rx_desc = &rxq->queue[id]; 834 m = rx_desc->mbuf; 835 836 if (__predict_false(rxq->init_state != SFXGE_RXQ_STARTED)) 837 goto discard; 838 839 if (rx_desc->flags & (EFX_ADDR_MISMATCH | EFX_DISCARD)) 840 goto discard; 841 842 /* Read the length from the pseudo header if required */ 843 if (rx_desc->flags & EFX_PKT_PREFIX_LEN) { 844 uint16_t tmp_size; 845 int rc; 846 rc = efx_pseudo_hdr_pkt_length_get(rxq->common, 847 mtod(m, uint8_t *), 848 &tmp_size); 849 KASSERT(rc == 0, ("cannot get packet length: %d", rc)); 850 rx_desc->size = (int)tmp_size + sc->rx_prefix_size; 851 } 852 853 prefetch_read_many(mtod(m, caddr_t)); 854 855 switch (rx_desc->flags & (EFX_PKT_IPV4 | EFX_PKT_IPV6)) { 856 case EFX_PKT_IPV4: 857 if (~if_capenable & IFCAP_RXCSUM) 858 rx_desc->flags &= 859 ~(EFX_CKSUM_IPV4 | EFX_CKSUM_TCPUDP); 860 break; 861 case EFX_PKT_IPV6: 862 if (~if_capenable & IFCAP_RXCSUM_IPV6) 863 rx_desc->flags &= ~EFX_CKSUM_TCPUDP; 864 break; 865 case 0: 866 /* Check for loopback packets */ 867 { 868 struct ether_header *etherhp; 869 870 /*LINTED*/ 871 etherhp = mtod(m, struct ether_header *); 872 873 if (etherhp->ether_type == 874 htons(SFXGE_ETHERTYPE_LOOPBACK)) { 875 EFSYS_PROBE(loopback); 876 877 rxq->loopback++; 878 goto discard; 879 } 880 } 881 break; 882 default: 883 KASSERT(B_FALSE, 884 ("Rx descriptor with both IPv4 and IPv6 flags")); 885 goto discard; 886 } 887 888 /* Pass packet up the stack or into LRO (pipelined) */ 889 if (prev != NULL) { 890 if (lro_enabled && 891 ((prev->flags & (EFX_PKT_TCP | EFX_CKSUM_TCPUDP)) == 892 (EFX_PKT_TCP | EFX_CKSUM_TCPUDP))) 893 sfxge_lro(rxq, prev); 894 else 895 sfxge_rx_deliver(rxq, prev); 896 } 897 prev = rx_desc; 898 continue; 899 900 discard: 901 /* Return the packet to the pool */ 902 m_free(m); 903 rx_desc->mbuf = NULL; 904 } 905 rxq->completed = completed; 906 907 level = rxq->added - rxq->completed; 908 909 /* Pass last packet up the stack or into LRO */ 910 if (prev != NULL) { 911 if (lro_enabled && 912 ((prev->flags & (EFX_PKT_TCP | EFX_CKSUM_TCPUDP)) == 913 (EFX_PKT_TCP | EFX_CKSUM_TCPUDP))) 914 sfxge_lro(rxq, prev); 915 else 916 sfxge_rx_deliver(rxq, prev); 917 } 918 919 /* 920 * If there are any pending flows and this is the end of the 921 * poll then they must be completed. 922 */ 923 if (eop) 924 sfxge_lro_end_of_burst(rxq); 925 926 /* Top up the queue if necessary */ 927 if (level < rxq->refill_threshold) 928 sfxge_rx_qfill(rxq, EFX_RXQ_LIMIT(rxq->entries), B_FALSE); 929 } 930 931 static void 932 sfxge_rx_qstop(struct sfxge_softc *sc, unsigned int index) 933 { 934 struct sfxge_rxq *rxq; 935 struct sfxge_evq *evq; 936 unsigned int count; 937 unsigned int retry = 3; 938 939 SFXGE_ADAPTER_LOCK_ASSERT_OWNED(sc); 940 941 rxq = sc->rxq[index]; 942 evq = sc->evq[index]; 943 944 SFXGE_EVQ_LOCK(evq); 945 946 KASSERT(rxq->init_state == SFXGE_RXQ_STARTED, 947 ("rxq not started")); 948 949 rxq->init_state = SFXGE_RXQ_INITIALIZED; 950 951 callout_stop(&rxq->refill_callout); 952 953 while (rxq->flush_state != SFXGE_FLUSH_DONE && retry != 0) { 954 rxq->flush_state = SFXGE_FLUSH_PENDING; 955 956 SFXGE_EVQ_UNLOCK(evq); 957 958 /* Flush the receive queue */ 959 if (efx_rx_qflush(rxq->common) != 0) { 960 SFXGE_EVQ_LOCK(evq); 961 rxq->flush_state = SFXGE_FLUSH_FAILED; 962 break; 963 } 964 965 count = 0; 966 do { 967 /* Spin for 100 ms */ 968 DELAY(100000); 969 970 if (rxq->flush_state != SFXGE_FLUSH_PENDING) 971 break; 972 973 } while (++count < 20); 974 975 SFXGE_EVQ_LOCK(evq); 976 977 if (rxq->flush_state == SFXGE_FLUSH_PENDING) { 978 /* Flush timeout - neither done nor failed */ 979 log(LOG_ERR, "%s: Cannot flush Rx queue %u\n", 980 device_get_nameunit(sc->dev), index); 981 rxq->flush_state = SFXGE_FLUSH_DONE; 982 } 983 retry--; 984 } 985 if (rxq->flush_state == SFXGE_FLUSH_FAILED) { 986 log(LOG_ERR, "%s: Flushing Rx queue %u failed\n", 987 device_get_nameunit(sc->dev), index); 988 rxq->flush_state = SFXGE_FLUSH_DONE; 989 } 990 991 rxq->pending = rxq->added; 992 sfxge_rx_qcomplete(rxq, B_TRUE); 993 994 KASSERT(rxq->completed == rxq->pending, 995 ("rxq->completed != rxq->pending")); 996 997 rxq->added = 0; 998 rxq->pushed = 0; 999 rxq->pending = 0; 1000 rxq->completed = 0; 1001 rxq->loopback = 0; 1002 1003 /* Destroy the common code receive queue. */ 1004 efx_rx_qdestroy(rxq->common); 1005 1006 efx_sram_buf_tbl_clear(sc->enp, rxq->buf_base_id, 1007 EFX_RXQ_NBUFS(sc->rxq_entries)); 1008 1009 SFXGE_EVQ_UNLOCK(evq); 1010 } 1011 1012 static int 1013 sfxge_rx_qstart(struct sfxge_softc *sc, unsigned int index) 1014 { 1015 struct sfxge_rxq *rxq; 1016 efsys_mem_t *esmp; 1017 struct sfxge_evq *evq; 1018 int rc; 1019 1020 SFXGE_ADAPTER_LOCK_ASSERT_OWNED(sc); 1021 1022 rxq = sc->rxq[index]; 1023 esmp = &rxq->mem; 1024 evq = sc->evq[index]; 1025 1026 KASSERT(rxq->init_state == SFXGE_RXQ_INITIALIZED, 1027 ("rxq->init_state != SFXGE_RXQ_INITIALIZED")); 1028 KASSERT(evq->init_state == SFXGE_EVQ_STARTED, 1029 ("evq->init_state != SFXGE_EVQ_STARTED")); 1030 1031 /* Program the buffer table. */ 1032 if ((rc = efx_sram_buf_tbl_set(sc->enp, rxq->buf_base_id, esmp, 1033 EFX_RXQ_NBUFS(sc->rxq_entries))) != 0) 1034 return (rc); 1035 1036 /* Create the common code receive queue. */ 1037 if ((rc = efx_rx_qcreate(sc->enp, index, 0, EFX_RXQ_TYPE_DEFAULT, 1038 esmp, sc->rxq_entries, rxq->buf_base_id, evq->common, 1039 &rxq->common)) != 0) 1040 goto fail; 1041 1042 SFXGE_EVQ_LOCK(evq); 1043 1044 /* Enable the receive queue. */ 1045 efx_rx_qenable(rxq->common); 1046 1047 rxq->init_state = SFXGE_RXQ_STARTED; 1048 rxq->flush_state = SFXGE_FLUSH_REQUIRED; 1049 1050 /* Try to fill the queue from the pool. */ 1051 sfxge_rx_qfill(rxq, EFX_RXQ_LIMIT(sc->rxq_entries), B_FALSE); 1052 1053 SFXGE_EVQ_UNLOCK(evq); 1054 1055 return (0); 1056 1057 fail: 1058 efx_sram_buf_tbl_clear(sc->enp, rxq->buf_base_id, 1059 EFX_RXQ_NBUFS(sc->rxq_entries)); 1060 return (rc); 1061 } 1062 1063 void 1064 sfxge_rx_stop(struct sfxge_softc *sc) 1065 { 1066 int index; 1067 1068 efx_mac_filter_default_rxq_clear(sc->enp); 1069 1070 /* Stop the receive queue(s) */ 1071 index = sc->rxq_count; 1072 while (--index >= 0) 1073 sfxge_rx_qstop(sc, index); 1074 1075 sc->rx_prefix_size = 0; 1076 sc->rx_buffer_size = 0; 1077 1078 efx_rx_fini(sc->enp); 1079 } 1080 1081 int 1082 sfxge_rx_start(struct sfxge_softc *sc) 1083 { 1084 struct sfxge_intr *intr; 1085 const efx_nic_cfg_t *encp; 1086 size_t hdrlen, align, reserved; 1087 int index; 1088 int rc; 1089 1090 intr = &sc->intr; 1091 1092 /* Initialize the common code receive module. */ 1093 if ((rc = efx_rx_init(sc->enp)) != 0) 1094 return (rc); 1095 1096 encp = efx_nic_cfg_get(sc->enp); 1097 sc->rx_buffer_size = EFX_MAC_PDU(sc->ifnet->if_mtu); 1098 1099 /* Calculate the receive packet buffer size. */ 1100 sc->rx_prefix_size = encp->enc_rx_prefix_size; 1101 1102 /* Ensure IP headers are 32bit aligned */ 1103 hdrlen = sc->rx_prefix_size + sizeof (struct ether_header); 1104 sc->rx_buffer_align = P2ROUNDUP(hdrlen, 4) - hdrlen; 1105 1106 sc->rx_buffer_size += sc->rx_buffer_align; 1107 1108 /* Align end of packet buffer for RX DMA end padding */ 1109 align = MAX(1, encp->enc_rx_buf_align_end); 1110 EFSYS_ASSERT(ISP2(align)); 1111 sc->rx_buffer_size = P2ROUNDUP(sc->rx_buffer_size, align); 1112 1113 /* 1114 * Standard mbuf zones only guarantee pointer-size alignment; 1115 * we need extra space to align to the cache line 1116 */ 1117 reserved = sc->rx_buffer_size + CACHE_LINE_SIZE; 1118 1119 /* Select zone for packet buffers */ 1120 if (reserved <= MCLBYTES) 1121 sc->rx_cluster_size = MCLBYTES; 1122 else if (reserved <= MJUMPAGESIZE) 1123 sc->rx_cluster_size = MJUMPAGESIZE; 1124 else if (reserved <= MJUM9BYTES) 1125 sc->rx_cluster_size = MJUM9BYTES; 1126 else 1127 sc->rx_cluster_size = MJUM16BYTES; 1128 1129 /* 1130 * Set up the scale table. Enable all hash types and hash insertion. 1131 */ 1132 for (index = 0; index < nitems(sc->rx_indir_table); index++) 1133 #ifdef RSS 1134 sc->rx_indir_table[index] = 1135 rss_get_indirection_to_bucket(index) % sc->rxq_count; 1136 #else 1137 sc->rx_indir_table[index] = index % sc->rxq_count; 1138 #endif 1139 if ((rc = efx_rx_scale_tbl_set(sc->enp, sc->rx_indir_table, 1140 nitems(sc->rx_indir_table))) != 0) 1141 goto fail; 1142 (void)efx_rx_scale_mode_set(sc->enp, EFX_RX_HASHALG_TOEPLITZ, 1143 EFX_RX_HASH_IPV4 | EFX_RX_HASH_TCPIPV4 | 1144 EFX_RX_HASH_IPV6 | EFX_RX_HASH_TCPIPV6, B_TRUE); 1145 1146 #ifdef RSS 1147 rss_getkey(toep_key); 1148 #endif 1149 if ((rc = efx_rx_scale_key_set(sc->enp, toep_key, 1150 sizeof(toep_key))) != 0) 1151 goto fail; 1152 1153 /* Start the receive queue(s). */ 1154 for (index = 0; index < sc->rxq_count; index++) { 1155 if ((rc = sfxge_rx_qstart(sc, index)) != 0) 1156 goto fail2; 1157 } 1158 1159 rc = efx_mac_filter_default_rxq_set(sc->enp, sc->rxq[0]->common, 1160 sc->intr.n_alloc > 1); 1161 if (rc != 0) 1162 goto fail3; 1163 1164 return (0); 1165 1166 fail3: 1167 fail2: 1168 while (--index >= 0) 1169 sfxge_rx_qstop(sc, index); 1170 1171 fail: 1172 efx_rx_fini(sc->enp); 1173 1174 return (rc); 1175 } 1176 1177 #ifdef SFXGE_LRO 1178 1179 static void sfxge_lro_init(struct sfxge_rxq *rxq) 1180 { 1181 struct sfxge_lro_state *st = &rxq->lro; 1182 unsigned i; 1183 1184 st->conns_mask = lro_table_size - 1; 1185 KASSERT(!((st->conns_mask + 1) & st->conns_mask), 1186 ("lro_table_size must be a power of 2")); 1187 st->sc = rxq->sc; 1188 st->conns = malloc((st->conns_mask + 1) * sizeof(st->conns[0]), 1189 M_SFXGE, M_WAITOK); 1190 st->conns_n = malloc((st->conns_mask + 1) * sizeof(st->conns_n[0]), 1191 M_SFXGE, M_WAITOK); 1192 for (i = 0; i <= st->conns_mask; ++i) { 1193 TAILQ_INIT(&st->conns[i]); 1194 st->conns_n[i] = 0; 1195 } 1196 LIST_INIT(&st->active_conns); 1197 TAILQ_INIT(&st->free_conns); 1198 } 1199 1200 static void sfxge_lro_fini(struct sfxge_rxq *rxq) 1201 { 1202 struct sfxge_lro_state *st = &rxq->lro; 1203 struct sfxge_lro_conn *c; 1204 unsigned i; 1205 1206 /* Return cleanly if sfxge_lro_init() has not been called. */ 1207 if (st->conns == NULL) 1208 return; 1209 1210 KASSERT(LIST_EMPTY(&st->active_conns), ("found active connections")); 1211 1212 for (i = 0; i <= st->conns_mask; ++i) { 1213 while (!TAILQ_EMPTY(&st->conns[i])) { 1214 c = TAILQ_LAST(&st->conns[i], sfxge_lro_tailq); 1215 sfxge_lro_drop(rxq, c); 1216 } 1217 } 1218 1219 while (!TAILQ_EMPTY(&st->free_conns)) { 1220 c = TAILQ_FIRST(&st->free_conns); 1221 TAILQ_REMOVE(&st->free_conns, c, link); 1222 KASSERT(!c->mbuf, ("found orphaned mbuf")); 1223 free(c, M_SFXGE); 1224 } 1225 1226 free(st->conns_n, M_SFXGE); 1227 free(st->conns, M_SFXGE); 1228 st->conns = NULL; 1229 } 1230 1231 #else 1232 1233 static void 1234 sfxge_lro_init(struct sfxge_rxq *rxq) 1235 { 1236 } 1237 1238 static void 1239 sfxge_lro_fini(struct sfxge_rxq *rxq) 1240 { 1241 } 1242 1243 #endif /* SFXGE_LRO */ 1244 1245 static void 1246 sfxge_rx_qfini(struct sfxge_softc *sc, unsigned int index) 1247 { 1248 struct sfxge_rxq *rxq; 1249 1250 rxq = sc->rxq[index]; 1251 1252 KASSERT(rxq->init_state == SFXGE_RXQ_INITIALIZED, 1253 ("rxq->init_state != SFXGE_RXQ_INITIALIZED")); 1254 1255 /* Free the context array and the flow table. */ 1256 free(rxq->queue, M_SFXGE); 1257 sfxge_lro_fini(rxq); 1258 1259 /* Release DMA memory. */ 1260 sfxge_dma_free(&rxq->mem); 1261 1262 sc->rxq[index] = NULL; 1263 1264 free(rxq, M_SFXGE); 1265 } 1266 1267 static int 1268 sfxge_rx_qinit(struct sfxge_softc *sc, unsigned int index) 1269 { 1270 struct sfxge_rxq *rxq; 1271 struct sfxge_evq *evq; 1272 efsys_mem_t *esmp; 1273 int rc; 1274 1275 KASSERT(index < sc->rxq_count, ("index >= %d", sc->rxq_count)); 1276 1277 rxq = malloc(sizeof(struct sfxge_rxq), M_SFXGE, M_ZERO | M_WAITOK); 1278 rxq->sc = sc; 1279 rxq->index = index; 1280 rxq->entries = sc->rxq_entries; 1281 rxq->ptr_mask = rxq->entries - 1; 1282 rxq->refill_threshold = RX_REFILL_THRESHOLD(rxq->entries); 1283 1284 sc->rxq[index] = rxq; 1285 esmp = &rxq->mem; 1286 1287 evq = sc->evq[index]; 1288 1289 /* Allocate and zero DMA space. */ 1290 if ((rc = sfxge_dma_alloc(sc, EFX_RXQ_SIZE(sc->rxq_entries), esmp)) != 0) 1291 return (rc); 1292 1293 /* Allocate buffer table entries. */ 1294 sfxge_sram_buf_tbl_alloc(sc, EFX_RXQ_NBUFS(sc->rxq_entries), 1295 &rxq->buf_base_id); 1296 1297 /* Allocate the context array and the flow table. */ 1298 rxq->queue = malloc(sizeof(struct sfxge_rx_sw_desc) * sc->rxq_entries, 1299 M_SFXGE, M_WAITOK | M_ZERO); 1300 sfxge_lro_init(rxq); 1301 1302 callout_init(&rxq->refill_callout, 1); 1303 1304 rxq->init_state = SFXGE_RXQ_INITIALIZED; 1305 1306 return (0); 1307 } 1308 1309 static const struct { 1310 const char *name; 1311 size_t offset; 1312 } sfxge_rx_stats[] = { 1313 #define SFXGE_RX_STAT(name, member) \ 1314 { #name, offsetof(struct sfxge_rxq, member) } 1315 #ifdef SFXGE_LRO 1316 SFXGE_RX_STAT(lro_merges, lro.n_merges), 1317 SFXGE_RX_STAT(lro_bursts, lro.n_bursts), 1318 SFXGE_RX_STAT(lro_slow_start, lro.n_slow_start), 1319 SFXGE_RX_STAT(lro_misorder, lro.n_misorder), 1320 SFXGE_RX_STAT(lro_too_many, lro.n_too_many), 1321 SFXGE_RX_STAT(lro_new_stream, lro.n_new_stream), 1322 SFXGE_RX_STAT(lro_drop_idle, lro.n_drop_idle), 1323 SFXGE_RX_STAT(lro_drop_closed, lro.n_drop_closed) 1324 #endif 1325 }; 1326 1327 static int 1328 sfxge_rx_stat_handler(SYSCTL_HANDLER_ARGS) 1329 { 1330 struct sfxge_softc *sc = arg1; 1331 unsigned int id = arg2; 1332 unsigned int sum, index; 1333 1334 /* Sum across all RX queues */ 1335 sum = 0; 1336 for (index = 0; index < sc->rxq_count; index++) 1337 sum += *(unsigned int *)((caddr_t)sc->rxq[index] + 1338 sfxge_rx_stats[id].offset); 1339 1340 return (SYSCTL_OUT(req, &sum, sizeof(sum))); 1341 } 1342 1343 static void 1344 sfxge_rx_stat_init(struct sfxge_softc *sc) 1345 { 1346 struct sysctl_ctx_list *ctx = device_get_sysctl_ctx(sc->dev); 1347 struct sysctl_oid_list *stat_list; 1348 unsigned int id; 1349 1350 stat_list = SYSCTL_CHILDREN(sc->stats_node); 1351 1352 for (id = 0; id < nitems(sfxge_rx_stats); id++) { 1353 SYSCTL_ADD_PROC( 1354 ctx, stat_list, 1355 OID_AUTO, sfxge_rx_stats[id].name, 1356 CTLTYPE_UINT|CTLFLAG_RD, 1357 sc, id, sfxge_rx_stat_handler, "IU", 1358 ""); 1359 } 1360 } 1361 1362 void 1363 sfxge_rx_fini(struct sfxge_softc *sc) 1364 { 1365 int index; 1366 1367 index = sc->rxq_count; 1368 while (--index >= 0) 1369 sfxge_rx_qfini(sc, index); 1370 1371 sc->rxq_count = 0; 1372 } 1373 1374 int 1375 sfxge_rx_init(struct sfxge_softc *sc) 1376 { 1377 struct sfxge_intr *intr; 1378 int index; 1379 int rc; 1380 1381 #ifdef SFXGE_LRO 1382 if (!ISP2(lro_table_size)) { 1383 log(LOG_ERR, "%s=%u must be power of 2", 1384 SFXGE_LRO_PARAM(table_size), lro_table_size); 1385 rc = EINVAL; 1386 goto fail_lro_table_size; 1387 } 1388 1389 if (lro_idle_ticks == 0) 1390 lro_idle_ticks = hz / 10 + 1; /* 100 ms */ 1391 #endif 1392 1393 intr = &sc->intr; 1394 1395 sc->rxq_count = intr->n_alloc; 1396 1397 KASSERT(intr->state == SFXGE_INTR_INITIALIZED, 1398 ("intr->state != SFXGE_INTR_INITIALIZED")); 1399 1400 /* Initialize the receive queue(s) - one per interrupt. */ 1401 for (index = 0; index < sc->rxq_count; index++) { 1402 if ((rc = sfxge_rx_qinit(sc, index)) != 0) 1403 goto fail; 1404 } 1405 1406 sfxge_rx_stat_init(sc); 1407 1408 return (0); 1409 1410 fail: 1411 /* Tear down the receive queue(s). */ 1412 while (--index >= 0) 1413 sfxge_rx_qfini(sc, index); 1414 1415 sc->rxq_count = 0; 1416 1417 #ifdef SFXGE_LRO 1418 fail_lro_table_size: 1419 #endif 1420 return (rc); 1421 } 1422