1 /* SPDX-License-Identifier: BSD-3-Clause 2 * Copyright(c) 2010-2014 Intel Corporation 3 */ 4 5 #include <stdint.h> 6 #include <stdio.h> 7 #include <stdlib.h> 8 #include <string.h> 9 #include <errno.h> 10 11 #include <rte_cycles.h> 12 #include <rte_memory.h> 13 #include <rte_branch_prediction.h> 14 #include <rte_mempool.h> 15 #include <rte_malloc.h> 16 #include <rte_mbuf.h> 17 #include <rte_ether.h> 18 #include <rte_ethdev_driver.h> 19 #include <rte_prefetch.h> 20 #include <rte_string_fns.h> 21 #include <rte_errno.h> 22 #include <rte_byteorder.h> 23 #include <rte_net.h> 24 #include <rte_ip.h> 25 #include <rte_udp.h> 26 #include <rte_tcp.h> 27 28 #include "virtio_logs.h" 29 #include "virtio_ethdev.h" 30 #include "virtio_pci.h" 31 #include "virtqueue.h" 32 #include "virtio_rxtx.h" 33 #include "virtio_rxtx_simple.h" 34 #include "virtio_ring.h" 35 36 #ifdef RTE_LIBRTE_VIRTIO_DEBUG_DUMP 37 #define VIRTIO_DUMP_PACKET(m, len) rte_pktmbuf_dump(stdout, m, len) 38 #else 39 #define VIRTIO_DUMP_PACKET(m, len) do { } while (0) 40 #endif 41 42 int 43 virtio_dev_rx_queue_done(void *rxq, uint16_t offset) 44 { 45 struct virtnet_rx *rxvq = rxq; 46 struct virtqueue *vq = rxvq->vq; 47 48 return VIRTQUEUE_NUSED(vq) >= offset; 49 } 50 51 void 52 vq_ring_free_inorder(struct virtqueue *vq, uint16_t desc_idx, uint16_t num) 53 { 54 vq->vq_free_cnt += num; 55 vq->vq_desc_tail_idx = desc_idx & (vq->vq_nentries - 1); 56 } 57 58 void 59 vq_ring_free_chain(struct virtqueue *vq, uint16_t desc_idx) 60 { 61 struct vring_desc *dp, *dp_tail; 62 struct vq_desc_extra *dxp; 63 uint16_t desc_idx_last = desc_idx; 64 65 dp = &vq->vq_split.ring.desc[desc_idx]; 66 dxp = &vq->vq_descx[desc_idx]; 67 vq->vq_free_cnt = (uint16_t)(vq->vq_free_cnt + dxp->ndescs); 68 if ((dp->flags & VRING_DESC_F_INDIRECT) == 0) { 69 while (dp->flags & VRING_DESC_F_NEXT) { 70 desc_idx_last = dp->next; 71 dp = &vq->vq_split.ring.desc[dp->next]; 72 } 73 } 74 dxp->ndescs = 0; 75 76 /* 77 * We must append the existing free chain, if any, to the end of 78 * newly freed chain. If the virtqueue was completely used, then 79 * head would be VQ_RING_DESC_CHAIN_END (ASSERTed above). 80 */ 81 if (vq->vq_desc_tail_idx == VQ_RING_DESC_CHAIN_END) { 82 vq->vq_desc_head_idx = desc_idx; 83 } else { 84 dp_tail = &vq->vq_split.ring.desc[vq->vq_desc_tail_idx]; 85 dp_tail->next = desc_idx; 86 } 87 88 vq->vq_desc_tail_idx = desc_idx_last; 89 dp->next = VQ_RING_DESC_CHAIN_END; 90 } 91 92 void 93 virtio_update_packet_stats(struct virtnet_stats *stats, struct rte_mbuf *mbuf) 94 { 95 uint32_t s = mbuf->pkt_len; 96 struct rte_ether_addr *ea; 97 98 stats->bytes += s; 99 100 if (s == 64) { 101 stats->size_bins[1]++; 102 } else if (s > 64 && s < 1024) { 103 uint32_t bin; 104 105 /* count zeros, and offset into correct bin */ 106 bin = (sizeof(s) * 8) - __builtin_clz(s) - 5; 107 stats->size_bins[bin]++; 108 } else { 109 if (s < 64) 110 stats->size_bins[0]++; 111 else if (s < 1519) 112 stats->size_bins[6]++; 113 else 114 stats->size_bins[7]++; 115 } 116 117 ea = rte_pktmbuf_mtod(mbuf, struct rte_ether_addr *); 118 if (rte_is_multicast_ether_addr(ea)) { 119 if (rte_is_broadcast_ether_addr(ea)) 120 stats->broadcast++; 121 else 122 stats->multicast++; 123 } 124 } 125 126 static inline void 127 virtio_rx_stats_updated(struct virtnet_rx *rxvq, struct rte_mbuf *m) 128 { 129 VIRTIO_DUMP_PACKET(m, m->data_len); 130 131 virtio_update_packet_stats(&rxvq->stats, m); 132 } 133 134 static uint16_t 135 virtqueue_dequeue_burst_rx_packed(struct virtqueue *vq, 136 struct rte_mbuf **rx_pkts, 137 uint32_t *len, 138 uint16_t num) 139 { 140 struct rte_mbuf *cookie; 141 uint16_t used_idx; 142 uint16_t id; 143 struct vring_packed_desc *desc; 144 uint16_t i; 145 146 desc = vq->vq_packed.ring.desc; 147 148 for (i = 0; i < num; i++) { 149 used_idx = vq->vq_used_cons_idx; 150 /* desc_is_used has a load-acquire or rte_cio_rmb inside 151 * and wait for used desc in virtqueue. 152 */ 153 if (!desc_is_used(&desc[used_idx], vq)) 154 return i; 155 len[i] = desc[used_idx].len; 156 id = desc[used_idx].id; 157 cookie = (struct rte_mbuf *)vq->vq_descx[id].cookie; 158 if (unlikely(cookie == NULL)) { 159 PMD_DRV_LOG(ERR, "vring descriptor with no mbuf cookie at %u", 160 vq->vq_used_cons_idx); 161 break; 162 } 163 rte_prefetch0(cookie); 164 rte_packet_prefetch(rte_pktmbuf_mtod(cookie, void *)); 165 rx_pkts[i] = cookie; 166 167 vq->vq_free_cnt++; 168 vq->vq_used_cons_idx++; 169 if (vq->vq_used_cons_idx >= vq->vq_nentries) { 170 vq->vq_used_cons_idx -= vq->vq_nentries; 171 vq->vq_packed.used_wrap_counter ^= 1; 172 } 173 } 174 175 return i; 176 } 177 178 static uint16_t 179 virtqueue_dequeue_burst_rx(struct virtqueue *vq, struct rte_mbuf **rx_pkts, 180 uint32_t *len, uint16_t num) 181 { 182 struct vring_used_elem *uep; 183 struct rte_mbuf *cookie; 184 uint16_t used_idx, desc_idx; 185 uint16_t i; 186 187 /* Caller does the check */ 188 for (i = 0; i < num ; i++) { 189 used_idx = (uint16_t)(vq->vq_used_cons_idx & (vq->vq_nentries - 1)); 190 uep = &vq->vq_split.ring.used->ring[used_idx]; 191 desc_idx = (uint16_t) uep->id; 192 len[i] = uep->len; 193 cookie = (struct rte_mbuf *)vq->vq_descx[desc_idx].cookie; 194 195 if (unlikely(cookie == NULL)) { 196 PMD_DRV_LOG(ERR, "vring descriptor with no mbuf cookie at %u", 197 vq->vq_used_cons_idx); 198 break; 199 } 200 201 rte_prefetch0(cookie); 202 rte_packet_prefetch(rte_pktmbuf_mtod(cookie, void *)); 203 rx_pkts[i] = cookie; 204 vq->vq_used_cons_idx++; 205 vq_ring_free_chain(vq, desc_idx); 206 vq->vq_descx[desc_idx].cookie = NULL; 207 } 208 209 return i; 210 } 211 212 static uint16_t 213 virtqueue_dequeue_rx_inorder(struct virtqueue *vq, 214 struct rte_mbuf **rx_pkts, 215 uint32_t *len, 216 uint16_t num) 217 { 218 struct vring_used_elem *uep; 219 struct rte_mbuf *cookie; 220 uint16_t used_idx = 0; 221 uint16_t i; 222 223 if (unlikely(num == 0)) 224 return 0; 225 226 for (i = 0; i < num; i++) { 227 used_idx = vq->vq_used_cons_idx & (vq->vq_nentries - 1); 228 /* Desc idx same as used idx */ 229 uep = &vq->vq_split.ring.used->ring[used_idx]; 230 len[i] = uep->len; 231 cookie = (struct rte_mbuf *)vq->vq_descx[used_idx].cookie; 232 233 if (unlikely(cookie == NULL)) { 234 PMD_DRV_LOG(ERR, "vring descriptor with no mbuf cookie at %u", 235 vq->vq_used_cons_idx); 236 break; 237 } 238 239 rte_prefetch0(cookie); 240 rte_packet_prefetch(rte_pktmbuf_mtod(cookie, void *)); 241 rx_pkts[i] = cookie; 242 vq->vq_used_cons_idx++; 243 vq->vq_descx[used_idx].cookie = NULL; 244 } 245 246 vq_ring_free_inorder(vq, used_idx, i); 247 return i; 248 } 249 250 static inline int 251 virtqueue_enqueue_refill_inorder(struct virtqueue *vq, 252 struct rte_mbuf **cookies, 253 uint16_t num) 254 { 255 struct vq_desc_extra *dxp; 256 struct virtio_hw *hw = vq->hw; 257 struct vring_desc *start_dp; 258 uint16_t head_idx, idx, i = 0; 259 260 if (unlikely(vq->vq_free_cnt == 0)) 261 return -ENOSPC; 262 if (unlikely(vq->vq_free_cnt < num)) 263 return -EMSGSIZE; 264 265 head_idx = vq->vq_desc_head_idx & (vq->vq_nentries - 1); 266 start_dp = vq->vq_split.ring.desc; 267 268 while (i < num) { 269 idx = head_idx & (vq->vq_nentries - 1); 270 dxp = &vq->vq_descx[idx]; 271 dxp->cookie = (void *)cookies[i]; 272 dxp->ndescs = 1; 273 274 start_dp[idx].addr = 275 VIRTIO_MBUF_ADDR(cookies[i], vq) + 276 RTE_PKTMBUF_HEADROOM - hw->vtnet_hdr_size; 277 start_dp[idx].len = 278 cookies[i]->buf_len - 279 RTE_PKTMBUF_HEADROOM + 280 hw->vtnet_hdr_size; 281 start_dp[idx].flags = VRING_DESC_F_WRITE; 282 283 vq_update_avail_ring(vq, idx); 284 head_idx++; 285 i++; 286 } 287 288 vq->vq_desc_head_idx += num; 289 vq->vq_free_cnt = (uint16_t)(vq->vq_free_cnt - num); 290 return 0; 291 } 292 293 static inline int 294 virtqueue_enqueue_recv_refill(struct virtqueue *vq, struct rte_mbuf **cookie, 295 uint16_t num) 296 { 297 struct vq_desc_extra *dxp; 298 struct virtio_hw *hw = vq->hw; 299 struct vring_desc *start_dp = vq->vq_split.ring.desc; 300 uint16_t idx, i; 301 302 if (unlikely(vq->vq_free_cnt == 0)) 303 return -ENOSPC; 304 if (unlikely(vq->vq_free_cnt < num)) 305 return -EMSGSIZE; 306 307 if (unlikely(vq->vq_desc_head_idx >= vq->vq_nentries)) 308 return -EFAULT; 309 310 for (i = 0; i < num; i++) { 311 idx = vq->vq_desc_head_idx; 312 dxp = &vq->vq_descx[idx]; 313 dxp->cookie = (void *)cookie[i]; 314 dxp->ndescs = 1; 315 316 start_dp[idx].addr = 317 VIRTIO_MBUF_ADDR(cookie[i], vq) + 318 RTE_PKTMBUF_HEADROOM - hw->vtnet_hdr_size; 319 start_dp[idx].len = 320 cookie[i]->buf_len - RTE_PKTMBUF_HEADROOM + 321 hw->vtnet_hdr_size; 322 start_dp[idx].flags = VRING_DESC_F_WRITE; 323 vq->vq_desc_head_idx = start_dp[idx].next; 324 vq_update_avail_ring(vq, idx); 325 if (vq->vq_desc_head_idx == VQ_RING_DESC_CHAIN_END) { 326 vq->vq_desc_tail_idx = vq->vq_desc_head_idx; 327 break; 328 } 329 } 330 331 vq->vq_free_cnt = (uint16_t)(vq->vq_free_cnt - num); 332 333 return 0; 334 } 335 336 static inline int 337 virtqueue_enqueue_recv_refill_packed(struct virtqueue *vq, 338 struct rte_mbuf **cookie, uint16_t num) 339 { 340 struct vring_packed_desc *start_dp = vq->vq_packed.ring.desc; 341 uint16_t flags = vq->vq_packed.cached_flags; 342 struct virtio_hw *hw = vq->hw; 343 struct vq_desc_extra *dxp; 344 uint16_t idx; 345 int i; 346 347 if (unlikely(vq->vq_free_cnt == 0)) 348 return -ENOSPC; 349 if (unlikely(vq->vq_free_cnt < num)) 350 return -EMSGSIZE; 351 352 for (i = 0; i < num; i++) { 353 idx = vq->vq_avail_idx; 354 dxp = &vq->vq_descx[idx]; 355 dxp->cookie = (void *)cookie[i]; 356 dxp->ndescs = 1; 357 358 start_dp[idx].addr = VIRTIO_MBUF_ADDR(cookie[i], vq) + 359 RTE_PKTMBUF_HEADROOM - hw->vtnet_hdr_size; 360 start_dp[idx].len = cookie[i]->buf_len - RTE_PKTMBUF_HEADROOM 361 + hw->vtnet_hdr_size; 362 363 vq->vq_desc_head_idx = dxp->next; 364 if (vq->vq_desc_head_idx == VQ_RING_DESC_CHAIN_END) 365 vq->vq_desc_tail_idx = vq->vq_desc_head_idx; 366 367 virtqueue_store_flags_packed(&start_dp[idx], flags, 368 hw->weak_barriers); 369 370 if (++vq->vq_avail_idx >= vq->vq_nentries) { 371 vq->vq_avail_idx -= vq->vq_nentries; 372 vq->vq_packed.cached_flags ^= 373 VRING_PACKED_DESC_F_AVAIL_USED; 374 flags = vq->vq_packed.cached_flags; 375 } 376 } 377 vq->vq_free_cnt = (uint16_t)(vq->vq_free_cnt - num); 378 return 0; 379 } 380 381 /* When doing TSO, the IP length is not included in the pseudo header 382 * checksum of the packet given to the PMD, but for virtio it is 383 * expected. 384 */ 385 static void 386 virtio_tso_fix_cksum(struct rte_mbuf *m) 387 { 388 /* common case: header is not fragmented */ 389 if (likely(rte_pktmbuf_data_len(m) >= m->l2_len + m->l3_len + 390 m->l4_len)) { 391 struct rte_ipv4_hdr *iph; 392 struct rte_ipv6_hdr *ip6h; 393 struct rte_tcp_hdr *th; 394 uint16_t prev_cksum, new_cksum, ip_len, ip_paylen; 395 uint32_t tmp; 396 397 iph = rte_pktmbuf_mtod_offset(m, 398 struct rte_ipv4_hdr *, m->l2_len); 399 th = RTE_PTR_ADD(iph, m->l3_len); 400 if ((iph->version_ihl >> 4) == 4) { 401 iph->hdr_checksum = 0; 402 iph->hdr_checksum = rte_ipv4_cksum(iph); 403 ip_len = iph->total_length; 404 ip_paylen = rte_cpu_to_be_16(rte_be_to_cpu_16(ip_len) - 405 m->l3_len); 406 } else { 407 ip6h = (struct rte_ipv6_hdr *)iph; 408 ip_paylen = ip6h->payload_len; 409 } 410 411 /* calculate the new phdr checksum not including ip_paylen */ 412 prev_cksum = th->cksum; 413 tmp = prev_cksum; 414 tmp += ip_paylen; 415 tmp = (tmp & 0xffff) + (tmp >> 16); 416 new_cksum = tmp; 417 418 /* replace it in the packet */ 419 th->cksum = new_cksum; 420 } 421 } 422 423 424 425 426 static inline void 427 virtqueue_enqueue_xmit_inorder(struct virtnet_tx *txvq, 428 struct rte_mbuf **cookies, 429 uint16_t num) 430 { 431 struct vq_desc_extra *dxp; 432 struct virtqueue *vq = txvq->vq; 433 struct vring_desc *start_dp; 434 struct virtio_net_hdr *hdr; 435 uint16_t idx; 436 int16_t head_size = vq->hw->vtnet_hdr_size; 437 uint16_t i = 0; 438 439 idx = vq->vq_desc_head_idx; 440 start_dp = vq->vq_split.ring.desc; 441 442 while (i < num) { 443 idx = idx & (vq->vq_nentries - 1); 444 dxp = &vq->vq_descx[vq->vq_avail_idx & (vq->vq_nentries - 1)]; 445 dxp->cookie = (void *)cookies[i]; 446 dxp->ndescs = 1; 447 virtio_update_packet_stats(&txvq->stats, cookies[i]); 448 449 hdr = rte_pktmbuf_mtod_offset(cookies[i], 450 struct virtio_net_hdr *, -head_size); 451 452 /* if offload disabled, hdr is not zeroed yet, do it now */ 453 if (!vq->hw->has_tx_offload) 454 virtqueue_clear_net_hdr(hdr); 455 else 456 virtqueue_xmit_offload(hdr, cookies[i], true); 457 458 start_dp[idx].addr = 459 VIRTIO_MBUF_DATA_DMA_ADDR(cookies[i], vq) - head_size; 460 start_dp[idx].len = cookies[i]->data_len + head_size; 461 start_dp[idx].flags = 0; 462 463 464 vq_update_avail_ring(vq, idx); 465 466 idx++; 467 i++; 468 }; 469 470 vq->vq_free_cnt = (uint16_t)(vq->vq_free_cnt - num); 471 vq->vq_desc_head_idx = idx & (vq->vq_nentries - 1); 472 } 473 474 static inline void 475 virtqueue_enqueue_xmit_packed_fast(struct virtnet_tx *txvq, 476 struct rte_mbuf *cookie, 477 int in_order) 478 { 479 struct virtqueue *vq = txvq->vq; 480 struct vring_packed_desc *dp; 481 struct vq_desc_extra *dxp; 482 uint16_t idx, id, flags; 483 int16_t head_size = vq->hw->vtnet_hdr_size; 484 struct virtio_net_hdr *hdr; 485 486 id = in_order ? vq->vq_avail_idx : vq->vq_desc_head_idx; 487 idx = vq->vq_avail_idx; 488 dp = &vq->vq_packed.ring.desc[idx]; 489 490 dxp = &vq->vq_descx[id]; 491 dxp->ndescs = 1; 492 dxp->cookie = cookie; 493 494 flags = vq->vq_packed.cached_flags; 495 496 /* prepend cannot fail, checked by caller */ 497 hdr = rte_pktmbuf_mtod_offset(cookie, struct virtio_net_hdr *, 498 -head_size); 499 500 /* if offload disabled, hdr is not zeroed yet, do it now */ 501 if (!vq->hw->has_tx_offload) 502 virtqueue_clear_net_hdr(hdr); 503 else 504 virtqueue_xmit_offload(hdr, cookie, true); 505 506 dp->addr = VIRTIO_MBUF_DATA_DMA_ADDR(cookie, vq) - head_size; 507 dp->len = cookie->data_len + head_size; 508 dp->id = id; 509 510 if (++vq->vq_avail_idx >= vq->vq_nentries) { 511 vq->vq_avail_idx -= vq->vq_nentries; 512 vq->vq_packed.cached_flags ^= VRING_PACKED_DESC_F_AVAIL_USED; 513 } 514 515 vq->vq_free_cnt--; 516 517 if (!in_order) { 518 vq->vq_desc_head_idx = dxp->next; 519 if (vq->vq_desc_head_idx == VQ_RING_DESC_CHAIN_END) 520 vq->vq_desc_tail_idx = VQ_RING_DESC_CHAIN_END; 521 } 522 523 virtqueue_store_flags_packed(dp, flags, vq->hw->weak_barriers); 524 } 525 526 static inline void 527 virtqueue_enqueue_xmit(struct virtnet_tx *txvq, struct rte_mbuf *cookie, 528 uint16_t needed, int use_indirect, int can_push, 529 int in_order) 530 { 531 struct virtio_tx_region *txr = txvq->virtio_net_hdr_mz->addr; 532 struct vq_desc_extra *dxp; 533 struct virtqueue *vq = txvq->vq; 534 struct vring_desc *start_dp; 535 uint16_t seg_num = cookie->nb_segs; 536 uint16_t head_idx, idx; 537 int16_t head_size = vq->hw->vtnet_hdr_size; 538 bool prepend_header = false; 539 struct virtio_net_hdr *hdr; 540 541 head_idx = vq->vq_desc_head_idx; 542 idx = head_idx; 543 if (in_order) 544 dxp = &vq->vq_descx[vq->vq_avail_idx & (vq->vq_nentries - 1)]; 545 else 546 dxp = &vq->vq_descx[idx]; 547 dxp->cookie = (void *)cookie; 548 dxp->ndescs = needed; 549 550 start_dp = vq->vq_split.ring.desc; 551 552 if (can_push) { 553 /* prepend cannot fail, checked by caller */ 554 hdr = rte_pktmbuf_mtod_offset(cookie, struct virtio_net_hdr *, 555 -head_size); 556 prepend_header = true; 557 558 /* if offload disabled, it is not zeroed below, do it now */ 559 if (!vq->hw->has_tx_offload) 560 virtqueue_clear_net_hdr(hdr); 561 } else if (use_indirect) { 562 /* setup tx ring slot to point to indirect 563 * descriptor list stored in reserved region. 564 * 565 * the first slot in indirect ring is already preset 566 * to point to the header in reserved region 567 */ 568 start_dp[idx].addr = txvq->virtio_net_hdr_mem + 569 RTE_PTR_DIFF(&txr[idx].tx_indir, txr); 570 start_dp[idx].len = (seg_num + 1) * sizeof(struct vring_desc); 571 start_dp[idx].flags = VRING_DESC_F_INDIRECT; 572 hdr = (struct virtio_net_hdr *)&txr[idx].tx_hdr; 573 574 /* loop below will fill in rest of the indirect elements */ 575 start_dp = txr[idx].tx_indir; 576 idx = 1; 577 } else { 578 /* setup first tx ring slot to point to header 579 * stored in reserved region. 580 */ 581 start_dp[idx].addr = txvq->virtio_net_hdr_mem + 582 RTE_PTR_DIFF(&txr[idx].tx_hdr, txr); 583 start_dp[idx].len = vq->hw->vtnet_hdr_size; 584 start_dp[idx].flags = VRING_DESC_F_NEXT; 585 hdr = (struct virtio_net_hdr *)&txr[idx].tx_hdr; 586 587 idx = start_dp[idx].next; 588 } 589 590 virtqueue_xmit_offload(hdr, cookie, vq->hw->has_tx_offload); 591 592 do { 593 start_dp[idx].addr = VIRTIO_MBUF_DATA_DMA_ADDR(cookie, vq); 594 start_dp[idx].len = cookie->data_len; 595 if (prepend_header) { 596 start_dp[idx].addr -= head_size; 597 start_dp[idx].len += head_size; 598 prepend_header = false; 599 } 600 start_dp[idx].flags = cookie->next ? VRING_DESC_F_NEXT : 0; 601 idx = start_dp[idx].next; 602 } while ((cookie = cookie->next) != NULL); 603 604 if (use_indirect) 605 idx = vq->vq_split.ring.desc[head_idx].next; 606 607 vq->vq_free_cnt = (uint16_t)(vq->vq_free_cnt - needed); 608 609 vq->vq_desc_head_idx = idx; 610 vq_update_avail_ring(vq, head_idx); 611 612 if (!in_order) { 613 if (vq->vq_desc_head_idx == VQ_RING_DESC_CHAIN_END) 614 vq->vq_desc_tail_idx = idx; 615 } 616 } 617 618 void 619 virtio_dev_cq_start(struct rte_eth_dev *dev) 620 { 621 struct virtio_hw *hw = dev->data->dev_private; 622 623 if (hw->cvq && hw->cvq->vq) { 624 rte_spinlock_init(&hw->cvq->lock); 625 VIRTQUEUE_DUMP((struct virtqueue *)hw->cvq->vq); 626 } 627 } 628 629 int 630 virtio_dev_rx_queue_setup(struct rte_eth_dev *dev, 631 uint16_t queue_idx, 632 uint16_t nb_desc, 633 unsigned int socket_id __rte_unused, 634 const struct rte_eth_rxconf *rx_conf, 635 struct rte_mempool *mp) 636 { 637 uint16_t vtpci_queue_idx = 2 * queue_idx + VTNET_SQ_RQ_QUEUE_IDX; 638 struct virtio_hw *hw = dev->data->dev_private; 639 struct virtqueue *vq = hw->vqs[vtpci_queue_idx]; 640 struct virtnet_rx *rxvq; 641 uint16_t rx_free_thresh; 642 643 PMD_INIT_FUNC_TRACE(); 644 645 if (rx_conf->rx_deferred_start) { 646 PMD_INIT_LOG(ERR, "Rx deferred start is not supported"); 647 return -EINVAL; 648 } 649 650 rx_free_thresh = rx_conf->rx_free_thresh; 651 if (rx_free_thresh == 0) 652 rx_free_thresh = 653 RTE_MIN(vq->vq_nentries / 4, DEFAULT_RX_FREE_THRESH); 654 655 if (rx_free_thresh & 0x3) { 656 RTE_LOG(ERR, PMD, "rx_free_thresh must be multiples of four." 657 " (rx_free_thresh=%u port=%u queue=%u)\n", 658 rx_free_thresh, dev->data->port_id, queue_idx); 659 return -EINVAL; 660 } 661 662 if (rx_free_thresh >= vq->vq_nentries) { 663 RTE_LOG(ERR, PMD, "rx_free_thresh must be less than the " 664 "number of RX entries (%u)." 665 " (rx_free_thresh=%u port=%u queue=%u)\n", 666 vq->vq_nentries, 667 rx_free_thresh, dev->data->port_id, queue_idx); 668 return -EINVAL; 669 } 670 vq->vq_free_thresh = rx_free_thresh; 671 672 if (nb_desc == 0 || nb_desc > vq->vq_nentries) 673 nb_desc = vq->vq_nentries; 674 vq->vq_free_cnt = RTE_MIN(vq->vq_free_cnt, nb_desc); 675 676 rxvq = &vq->rxq; 677 rxvq->queue_id = queue_idx; 678 rxvq->mpool = mp; 679 dev->data->rx_queues[queue_idx] = rxvq; 680 681 return 0; 682 } 683 684 int 685 virtio_dev_rx_queue_setup_finish(struct rte_eth_dev *dev, uint16_t queue_idx) 686 { 687 uint16_t vtpci_queue_idx = 2 * queue_idx + VTNET_SQ_RQ_QUEUE_IDX; 688 struct virtio_hw *hw = dev->data->dev_private; 689 struct virtqueue *vq = hw->vqs[vtpci_queue_idx]; 690 struct virtnet_rx *rxvq = &vq->rxq; 691 struct rte_mbuf *m; 692 uint16_t desc_idx; 693 int error, nbufs, i; 694 bool in_order = vtpci_with_feature(hw, VIRTIO_F_IN_ORDER); 695 696 PMD_INIT_FUNC_TRACE(); 697 698 /* Allocate blank mbufs for the each rx descriptor */ 699 nbufs = 0; 700 701 if (hw->use_vec_rx && !vtpci_packed_queue(hw)) { 702 for (desc_idx = 0; desc_idx < vq->vq_nentries; 703 desc_idx++) { 704 vq->vq_split.ring.avail->ring[desc_idx] = desc_idx; 705 vq->vq_split.ring.desc[desc_idx].flags = 706 VRING_DESC_F_WRITE; 707 } 708 709 virtio_rxq_vec_setup(rxvq); 710 } 711 712 memset(&rxvq->fake_mbuf, 0, sizeof(rxvq->fake_mbuf)); 713 for (desc_idx = 0; desc_idx < RTE_PMD_VIRTIO_RX_MAX_BURST; 714 desc_idx++) { 715 vq->sw_ring[vq->vq_nentries + desc_idx] = 716 &rxvq->fake_mbuf; 717 } 718 719 if (hw->use_vec_rx && !vtpci_packed_queue(hw)) { 720 while (vq->vq_free_cnt >= RTE_VIRTIO_VPMD_RX_REARM_THRESH) { 721 virtio_rxq_rearm_vec(rxvq); 722 nbufs += RTE_VIRTIO_VPMD_RX_REARM_THRESH; 723 } 724 } else if (!vtpci_packed_queue(vq->hw) && in_order) { 725 if ((!virtqueue_full(vq))) { 726 uint16_t free_cnt = vq->vq_free_cnt; 727 struct rte_mbuf *pkts[free_cnt]; 728 729 if (!rte_pktmbuf_alloc_bulk(rxvq->mpool, pkts, 730 free_cnt)) { 731 error = virtqueue_enqueue_refill_inorder(vq, 732 pkts, 733 free_cnt); 734 if (unlikely(error)) { 735 for (i = 0; i < free_cnt; i++) 736 rte_pktmbuf_free(pkts[i]); 737 } 738 } 739 740 nbufs += free_cnt; 741 vq_update_avail_idx(vq); 742 } 743 } else { 744 while (!virtqueue_full(vq)) { 745 m = rte_mbuf_raw_alloc(rxvq->mpool); 746 if (m == NULL) 747 break; 748 749 /* Enqueue allocated buffers */ 750 if (vtpci_packed_queue(vq->hw)) 751 error = virtqueue_enqueue_recv_refill_packed(vq, 752 &m, 1); 753 else 754 error = virtqueue_enqueue_recv_refill(vq, 755 &m, 1); 756 if (error) { 757 rte_pktmbuf_free(m); 758 break; 759 } 760 nbufs++; 761 } 762 763 if (!vtpci_packed_queue(vq->hw)) 764 vq_update_avail_idx(vq); 765 } 766 767 PMD_INIT_LOG(DEBUG, "Allocated %d bufs", nbufs); 768 769 VIRTQUEUE_DUMP(vq); 770 771 return 0; 772 } 773 774 /* 775 * struct rte_eth_dev *dev: Used to update dev 776 * uint16_t nb_desc: Defaults to values read from config space 777 * unsigned int socket_id: Used to allocate memzone 778 * const struct rte_eth_txconf *tx_conf: Used to setup tx engine 779 * uint16_t queue_idx: Just used as an index in dev txq list 780 */ 781 int 782 virtio_dev_tx_queue_setup(struct rte_eth_dev *dev, 783 uint16_t queue_idx, 784 uint16_t nb_desc, 785 unsigned int socket_id __rte_unused, 786 const struct rte_eth_txconf *tx_conf) 787 { 788 uint8_t vtpci_queue_idx = 2 * queue_idx + VTNET_SQ_TQ_QUEUE_IDX; 789 struct virtio_hw *hw = dev->data->dev_private; 790 struct virtqueue *vq = hw->vqs[vtpci_queue_idx]; 791 struct virtnet_tx *txvq; 792 uint16_t tx_free_thresh; 793 794 PMD_INIT_FUNC_TRACE(); 795 796 if (tx_conf->tx_deferred_start) { 797 PMD_INIT_LOG(ERR, "Tx deferred start is not supported"); 798 return -EINVAL; 799 } 800 801 if (nb_desc == 0 || nb_desc > vq->vq_nentries) 802 nb_desc = vq->vq_nentries; 803 vq->vq_free_cnt = RTE_MIN(vq->vq_free_cnt, nb_desc); 804 805 txvq = &vq->txq; 806 txvq->queue_id = queue_idx; 807 808 tx_free_thresh = tx_conf->tx_free_thresh; 809 if (tx_free_thresh == 0) 810 tx_free_thresh = 811 RTE_MIN(vq->vq_nentries / 4, DEFAULT_TX_FREE_THRESH); 812 813 if (tx_free_thresh >= (vq->vq_nentries - 3)) { 814 PMD_DRV_LOG(ERR, "tx_free_thresh must be less than the " 815 "number of TX entries minus 3 (%u)." 816 " (tx_free_thresh=%u port=%u queue=%u)\n", 817 vq->vq_nentries - 3, 818 tx_free_thresh, dev->data->port_id, queue_idx); 819 return -EINVAL; 820 } 821 822 vq->vq_free_thresh = tx_free_thresh; 823 824 dev->data->tx_queues[queue_idx] = txvq; 825 return 0; 826 } 827 828 int 829 virtio_dev_tx_queue_setup_finish(struct rte_eth_dev *dev, 830 uint16_t queue_idx) 831 { 832 uint8_t vtpci_queue_idx = 2 * queue_idx + VTNET_SQ_TQ_QUEUE_IDX; 833 struct virtio_hw *hw = dev->data->dev_private; 834 struct virtqueue *vq = hw->vqs[vtpci_queue_idx]; 835 836 PMD_INIT_FUNC_TRACE(); 837 838 if (!vtpci_packed_queue(hw)) { 839 if (vtpci_with_feature(hw, VIRTIO_F_IN_ORDER)) 840 vq->vq_split.ring.desc[vq->vq_nentries - 1].next = 0; 841 } 842 843 VIRTQUEUE_DUMP(vq); 844 845 return 0; 846 } 847 848 static inline void 849 virtio_discard_rxbuf(struct virtqueue *vq, struct rte_mbuf *m) 850 { 851 int error; 852 /* 853 * Requeue the discarded mbuf. This should always be 854 * successful since it was just dequeued. 855 */ 856 if (vtpci_packed_queue(vq->hw)) 857 error = virtqueue_enqueue_recv_refill_packed(vq, &m, 1); 858 else 859 error = virtqueue_enqueue_recv_refill(vq, &m, 1); 860 861 if (unlikely(error)) { 862 PMD_DRV_LOG(ERR, "cannot requeue discarded mbuf"); 863 rte_pktmbuf_free(m); 864 } 865 } 866 867 static inline void 868 virtio_discard_rxbuf_inorder(struct virtqueue *vq, struct rte_mbuf *m) 869 { 870 int error; 871 872 error = virtqueue_enqueue_refill_inorder(vq, &m, 1); 873 if (unlikely(error)) { 874 PMD_DRV_LOG(ERR, "cannot requeue discarded mbuf"); 875 rte_pktmbuf_free(m); 876 } 877 } 878 879 /* Optionally fill offload information in structure */ 880 static inline int 881 virtio_rx_offload(struct rte_mbuf *m, struct virtio_net_hdr *hdr) 882 { 883 struct rte_net_hdr_lens hdr_lens; 884 uint32_t hdrlen, ptype; 885 int l4_supported = 0; 886 887 /* nothing to do */ 888 if (hdr->flags == 0 && hdr->gso_type == VIRTIO_NET_HDR_GSO_NONE) 889 return 0; 890 891 m->ol_flags |= PKT_RX_IP_CKSUM_UNKNOWN; 892 893 ptype = rte_net_get_ptype(m, &hdr_lens, RTE_PTYPE_ALL_MASK); 894 m->packet_type = ptype; 895 if ((ptype & RTE_PTYPE_L4_MASK) == RTE_PTYPE_L4_TCP || 896 (ptype & RTE_PTYPE_L4_MASK) == RTE_PTYPE_L4_UDP || 897 (ptype & RTE_PTYPE_L4_MASK) == RTE_PTYPE_L4_SCTP) 898 l4_supported = 1; 899 900 if (hdr->flags & VIRTIO_NET_HDR_F_NEEDS_CSUM) { 901 hdrlen = hdr_lens.l2_len + hdr_lens.l3_len + hdr_lens.l4_len; 902 if (hdr->csum_start <= hdrlen && l4_supported) { 903 m->ol_flags |= PKT_RX_L4_CKSUM_NONE; 904 } else { 905 /* Unknown proto or tunnel, do sw cksum. We can assume 906 * the cksum field is in the first segment since the 907 * buffers we provided to the host are large enough. 908 * In case of SCTP, this will be wrong since it's a CRC 909 * but there's nothing we can do. 910 */ 911 uint16_t csum = 0, off; 912 913 rte_raw_cksum_mbuf(m, hdr->csum_start, 914 rte_pktmbuf_pkt_len(m) - hdr->csum_start, 915 &csum); 916 if (likely(csum != 0xffff)) 917 csum = ~csum; 918 off = hdr->csum_offset + hdr->csum_start; 919 if (rte_pktmbuf_data_len(m) >= off + 1) 920 *rte_pktmbuf_mtod_offset(m, uint16_t *, 921 off) = csum; 922 } 923 } else if (hdr->flags & VIRTIO_NET_HDR_F_DATA_VALID && l4_supported) { 924 m->ol_flags |= PKT_RX_L4_CKSUM_GOOD; 925 } 926 927 /* GSO request, save required information in mbuf */ 928 if (hdr->gso_type != VIRTIO_NET_HDR_GSO_NONE) { 929 /* Check unsupported modes */ 930 if ((hdr->gso_type & VIRTIO_NET_HDR_GSO_ECN) || 931 (hdr->gso_size == 0)) { 932 return -EINVAL; 933 } 934 935 /* Update mss lengthes in mbuf */ 936 m->tso_segsz = hdr->gso_size; 937 switch (hdr->gso_type & ~VIRTIO_NET_HDR_GSO_ECN) { 938 case VIRTIO_NET_HDR_GSO_TCPV4: 939 case VIRTIO_NET_HDR_GSO_TCPV6: 940 m->ol_flags |= PKT_RX_LRO | \ 941 PKT_RX_L4_CKSUM_NONE; 942 break; 943 default: 944 return -EINVAL; 945 } 946 } 947 948 return 0; 949 } 950 951 #define DESC_PER_CACHELINE (RTE_CACHE_LINE_SIZE / sizeof(struct vring_desc)) 952 uint16_t 953 virtio_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts, uint16_t nb_pkts) 954 { 955 struct virtnet_rx *rxvq = rx_queue; 956 struct virtqueue *vq = rxvq->vq; 957 struct virtio_hw *hw = vq->hw; 958 struct rte_mbuf *rxm; 959 uint16_t nb_used, num, nb_rx; 960 uint32_t len[VIRTIO_MBUF_BURST_SZ]; 961 struct rte_mbuf *rcv_pkts[VIRTIO_MBUF_BURST_SZ]; 962 int error; 963 uint32_t i, nb_enqueued; 964 uint32_t hdr_size; 965 struct virtio_net_hdr *hdr; 966 967 nb_rx = 0; 968 if (unlikely(hw->started == 0)) 969 return nb_rx; 970 971 nb_used = VIRTQUEUE_NUSED(vq); 972 973 virtio_rmb(hw->weak_barriers); 974 975 num = likely(nb_used <= nb_pkts) ? nb_used : nb_pkts; 976 if (unlikely(num > VIRTIO_MBUF_BURST_SZ)) 977 num = VIRTIO_MBUF_BURST_SZ; 978 if (likely(num > DESC_PER_CACHELINE)) 979 num = num - ((vq->vq_used_cons_idx + num) % DESC_PER_CACHELINE); 980 981 num = virtqueue_dequeue_burst_rx(vq, rcv_pkts, len, num); 982 PMD_RX_LOG(DEBUG, "used:%d dequeue:%d", nb_used, num); 983 984 nb_enqueued = 0; 985 hdr_size = hw->vtnet_hdr_size; 986 987 for (i = 0; i < num ; i++) { 988 rxm = rcv_pkts[i]; 989 990 PMD_RX_LOG(DEBUG, "packet len:%d", len[i]); 991 992 if (unlikely(len[i] < hdr_size + RTE_ETHER_HDR_LEN)) { 993 PMD_RX_LOG(ERR, "Packet drop"); 994 nb_enqueued++; 995 virtio_discard_rxbuf(vq, rxm); 996 rxvq->stats.errors++; 997 continue; 998 } 999 1000 rxm->port = rxvq->port_id; 1001 rxm->data_off = RTE_PKTMBUF_HEADROOM; 1002 rxm->ol_flags = 0; 1003 rxm->vlan_tci = 0; 1004 1005 rxm->pkt_len = (uint32_t)(len[i] - hdr_size); 1006 rxm->data_len = (uint16_t)(len[i] - hdr_size); 1007 1008 hdr = (struct virtio_net_hdr *)((char *)rxm->buf_addr + 1009 RTE_PKTMBUF_HEADROOM - hdr_size); 1010 1011 if (hw->vlan_strip) 1012 rte_vlan_strip(rxm); 1013 1014 if (hw->has_rx_offload && virtio_rx_offload(rxm, hdr) < 0) { 1015 virtio_discard_rxbuf(vq, rxm); 1016 rxvq->stats.errors++; 1017 continue; 1018 } 1019 1020 virtio_rx_stats_updated(rxvq, rxm); 1021 1022 rx_pkts[nb_rx++] = rxm; 1023 } 1024 1025 rxvq->stats.packets += nb_rx; 1026 1027 /* Allocate new mbuf for the used descriptor */ 1028 if (likely(!virtqueue_full(vq))) { 1029 uint16_t free_cnt = vq->vq_free_cnt; 1030 struct rte_mbuf *new_pkts[free_cnt]; 1031 1032 if (likely(rte_pktmbuf_alloc_bulk(rxvq->mpool, new_pkts, 1033 free_cnt) == 0)) { 1034 error = virtqueue_enqueue_recv_refill(vq, new_pkts, 1035 free_cnt); 1036 if (unlikely(error)) { 1037 for (i = 0; i < free_cnt; i++) 1038 rte_pktmbuf_free(new_pkts[i]); 1039 } 1040 nb_enqueued += free_cnt; 1041 } else { 1042 struct rte_eth_dev *dev = 1043 &rte_eth_devices[rxvq->port_id]; 1044 dev->data->rx_mbuf_alloc_failed += free_cnt; 1045 } 1046 } 1047 1048 if (likely(nb_enqueued)) { 1049 vq_update_avail_idx(vq); 1050 1051 if (unlikely(virtqueue_kick_prepare(vq))) { 1052 virtqueue_notify(vq); 1053 PMD_RX_LOG(DEBUG, "Notified"); 1054 } 1055 } 1056 1057 return nb_rx; 1058 } 1059 1060 uint16_t 1061 virtio_recv_pkts_packed(void *rx_queue, struct rte_mbuf **rx_pkts, 1062 uint16_t nb_pkts) 1063 { 1064 struct virtnet_rx *rxvq = rx_queue; 1065 struct virtqueue *vq = rxvq->vq; 1066 struct virtio_hw *hw = vq->hw; 1067 struct rte_mbuf *rxm; 1068 uint16_t num, nb_rx; 1069 uint32_t len[VIRTIO_MBUF_BURST_SZ]; 1070 struct rte_mbuf *rcv_pkts[VIRTIO_MBUF_BURST_SZ]; 1071 int error; 1072 uint32_t i, nb_enqueued; 1073 uint32_t hdr_size; 1074 struct virtio_net_hdr *hdr; 1075 1076 nb_rx = 0; 1077 if (unlikely(hw->started == 0)) 1078 return nb_rx; 1079 1080 num = RTE_MIN(VIRTIO_MBUF_BURST_SZ, nb_pkts); 1081 if (likely(num > DESC_PER_CACHELINE)) 1082 num = num - ((vq->vq_used_cons_idx + num) % DESC_PER_CACHELINE); 1083 1084 num = virtqueue_dequeue_burst_rx_packed(vq, rcv_pkts, len, num); 1085 PMD_RX_LOG(DEBUG, "dequeue:%d", num); 1086 1087 nb_enqueued = 0; 1088 hdr_size = hw->vtnet_hdr_size; 1089 1090 for (i = 0; i < num; i++) { 1091 rxm = rcv_pkts[i]; 1092 1093 PMD_RX_LOG(DEBUG, "packet len:%d", len[i]); 1094 1095 if (unlikely(len[i] < hdr_size + RTE_ETHER_HDR_LEN)) { 1096 PMD_RX_LOG(ERR, "Packet drop"); 1097 nb_enqueued++; 1098 virtio_discard_rxbuf(vq, rxm); 1099 rxvq->stats.errors++; 1100 continue; 1101 } 1102 1103 rxm->port = rxvq->port_id; 1104 rxm->data_off = RTE_PKTMBUF_HEADROOM; 1105 rxm->ol_flags = 0; 1106 rxm->vlan_tci = 0; 1107 1108 rxm->pkt_len = (uint32_t)(len[i] - hdr_size); 1109 rxm->data_len = (uint16_t)(len[i] - hdr_size); 1110 1111 hdr = (struct virtio_net_hdr *)((char *)rxm->buf_addr + 1112 RTE_PKTMBUF_HEADROOM - hdr_size); 1113 1114 if (hw->vlan_strip) 1115 rte_vlan_strip(rxm); 1116 1117 if (hw->has_rx_offload && virtio_rx_offload(rxm, hdr) < 0) { 1118 virtio_discard_rxbuf(vq, rxm); 1119 rxvq->stats.errors++; 1120 continue; 1121 } 1122 1123 virtio_rx_stats_updated(rxvq, rxm); 1124 1125 rx_pkts[nb_rx++] = rxm; 1126 } 1127 1128 rxvq->stats.packets += nb_rx; 1129 1130 /* Allocate new mbuf for the used descriptor */ 1131 if (likely(!virtqueue_full(vq))) { 1132 uint16_t free_cnt = vq->vq_free_cnt; 1133 struct rte_mbuf *new_pkts[free_cnt]; 1134 1135 if (likely(rte_pktmbuf_alloc_bulk(rxvq->mpool, new_pkts, 1136 free_cnt) == 0)) { 1137 error = virtqueue_enqueue_recv_refill_packed(vq, 1138 new_pkts, free_cnt); 1139 if (unlikely(error)) { 1140 for (i = 0; i < free_cnt; i++) 1141 rte_pktmbuf_free(new_pkts[i]); 1142 } 1143 nb_enqueued += free_cnt; 1144 } else { 1145 struct rte_eth_dev *dev = 1146 &rte_eth_devices[rxvq->port_id]; 1147 dev->data->rx_mbuf_alloc_failed += free_cnt; 1148 } 1149 } 1150 1151 if (likely(nb_enqueued)) { 1152 if (unlikely(virtqueue_kick_prepare_packed(vq))) { 1153 virtqueue_notify(vq); 1154 PMD_RX_LOG(DEBUG, "Notified"); 1155 } 1156 } 1157 1158 return nb_rx; 1159 } 1160 1161 1162 uint16_t 1163 virtio_recv_pkts_inorder(void *rx_queue, 1164 struct rte_mbuf **rx_pkts, 1165 uint16_t nb_pkts) 1166 { 1167 struct virtnet_rx *rxvq = rx_queue; 1168 struct virtqueue *vq = rxvq->vq; 1169 struct virtio_hw *hw = vq->hw; 1170 struct rte_mbuf *rxm; 1171 struct rte_mbuf *prev = NULL; 1172 uint16_t nb_used, num, nb_rx; 1173 uint32_t len[VIRTIO_MBUF_BURST_SZ]; 1174 struct rte_mbuf *rcv_pkts[VIRTIO_MBUF_BURST_SZ]; 1175 int error; 1176 uint32_t nb_enqueued; 1177 uint32_t seg_num; 1178 uint32_t seg_res; 1179 uint32_t hdr_size; 1180 int32_t i; 1181 1182 nb_rx = 0; 1183 if (unlikely(hw->started == 0)) 1184 return nb_rx; 1185 1186 nb_used = VIRTQUEUE_NUSED(vq); 1187 nb_used = RTE_MIN(nb_used, nb_pkts); 1188 nb_used = RTE_MIN(nb_used, VIRTIO_MBUF_BURST_SZ); 1189 1190 virtio_rmb(hw->weak_barriers); 1191 1192 PMD_RX_LOG(DEBUG, "used:%d", nb_used); 1193 1194 nb_enqueued = 0; 1195 seg_num = 1; 1196 seg_res = 0; 1197 hdr_size = hw->vtnet_hdr_size; 1198 1199 num = virtqueue_dequeue_rx_inorder(vq, rcv_pkts, len, nb_used); 1200 1201 for (i = 0; i < num; i++) { 1202 struct virtio_net_hdr_mrg_rxbuf *header; 1203 1204 PMD_RX_LOG(DEBUG, "dequeue:%d", num); 1205 PMD_RX_LOG(DEBUG, "packet len:%d", len[i]); 1206 1207 rxm = rcv_pkts[i]; 1208 1209 if (unlikely(len[i] < hdr_size + RTE_ETHER_HDR_LEN)) { 1210 PMD_RX_LOG(ERR, "Packet drop"); 1211 nb_enqueued++; 1212 virtio_discard_rxbuf_inorder(vq, rxm); 1213 rxvq->stats.errors++; 1214 continue; 1215 } 1216 1217 header = (struct virtio_net_hdr_mrg_rxbuf *) 1218 ((char *)rxm->buf_addr + RTE_PKTMBUF_HEADROOM 1219 - hdr_size); 1220 1221 if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF)) { 1222 seg_num = header->num_buffers; 1223 if (seg_num == 0) 1224 seg_num = 1; 1225 } else { 1226 seg_num = 1; 1227 } 1228 1229 rxm->data_off = RTE_PKTMBUF_HEADROOM; 1230 rxm->nb_segs = seg_num; 1231 rxm->ol_flags = 0; 1232 rxm->vlan_tci = 0; 1233 rxm->pkt_len = (uint32_t)(len[i] - hdr_size); 1234 rxm->data_len = (uint16_t)(len[i] - hdr_size); 1235 1236 rxm->port = rxvq->port_id; 1237 1238 rx_pkts[nb_rx] = rxm; 1239 prev = rxm; 1240 1241 if (vq->hw->has_rx_offload && 1242 virtio_rx_offload(rxm, &header->hdr) < 0) { 1243 virtio_discard_rxbuf_inorder(vq, rxm); 1244 rxvq->stats.errors++; 1245 continue; 1246 } 1247 1248 if (hw->vlan_strip) 1249 rte_vlan_strip(rx_pkts[nb_rx]); 1250 1251 seg_res = seg_num - 1; 1252 1253 /* Merge remaining segments */ 1254 while (seg_res != 0 && i < (num - 1)) { 1255 i++; 1256 1257 rxm = rcv_pkts[i]; 1258 rxm->data_off = RTE_PKTMBUF_HEADROOM - hdr_size; 1259 rxm->pkt_len = (uint32_t)(len[i]); 1260 rxm->data_len = (uint16_t)(len[i]); 1261 1262 rx_pkts[nb_rx]->pkt_len += (uint32_t)(len[i]); 1263 1264 prev->next = rxm; 1265 prev = rxm; 1266 seg_res -= 1; 1267 } 1268 1269 if (!seg_res) { 1270 virtio_rx_stats_updated(rxvq, rx_pkts[nb_rx]); 1271 nb_rx++; 1272 } 1273 } 1274 1275 /* Last packet still need merge segments */ 1276 while (seg_res != 0) { 1277 uint16_t rcv_cnt = RTE_MIN((uint16_t)seg_res, 1278 VIRTIO_MBUF_BURST_SZ); 1279 1280 if (likely(VIRTQUEUE_NUSED(vq) >= rcv_cnt)) { 1281 virtio_rmb(hw->weak_barriers); 1282 num = virtqueue_dequeue_rx_inorder(vq, rcv_pkts, len, 1283 rcv_cnt); 1284 uint16_t extra_idx = 0; 1285 1286 rcv_cnt = num; 1287 while (extra_idx < rcv_cnt) { 1288 rxm = rcv_pkts[extra_idx]; 1289 rxm->data_off = 1290 RTE_PKTMBUF_HEADROOM - hdr_size; 1291 rxm->pkt_len = (uint32_t)(len[extra_idx]); 1292 rxm->data_len = (uint16_t)(len[extra_idx]); 1293 prev->next = rxm; 1294 prev = rxm; 1295 rx_pkts[nb_rx]->pkt_len += len[extra_idx]; 1296 extra_idx += 1; 1297 }; 1298 seg_res -= rcv_cnt; 1299 1300 if (!seg_res) { 1301 virtio_rx_stats_updated(rxvq, rx_pkts[nb_rx]); 1302 nb_rx++; 1303 } 1304 } else { 1305 PMD_RX_LOG(ERR, 1306 "No enough segments for packet."); 1307 rte_pktmbuf_free(rx_pkts[nb_rx]); 1308 rxvq->stats.errors++; 1309 break; 1310 } 1311 } 1312 1313 rxvq->stats.packets += nb_rx; 1314 1315 /* Allocate new mbuf for the used descriptor */ 1316 1317 if (likely(!virtqueue_full(vq))) { 1318 /* free_cnt may include mrg descs */ 1319 uint16_t free_cnt = vq->vq_free_cnt; 1320 struct rte_mbuf *new_pkts[free_cnt]; 1321 1322 if (!rte_pktmbuf_alloc_bulk(rxvq->mpool, new_pkts, free_cnt)) { 1323 error = virtqueue_enqueue_refill_inorder(vq, new_pkts, 1324 free_cnt); 1325 if (unlikely(error)) { 1326 for (i = 0; i < free_cnt; i++) 1327 rte_pktmbuf_free(new_pkts[i]); 1328 } 1329 nb_enqueued += free_cnt; 1330 } else { 1331 struct rte_eth_dev *dev = 1332 &rte_eth_devices[rxvq->port_id]; 1333 dev->data->rx_mbuf_alloc_failed += free_cnt; 1334 } 1335 } 1336 1337 if (likely(nb_enqueued)) { 1338 vq_update_avail_idx(vq); 1339 1340 if (unlikely(virtqueue_kick_prepare(vq))) { 1341 virtqueue_notify(vq); 1342 PMD_RX_LOG(DEBUG, "Notified"); 1343 } 1344 } 1345 1346 return nb_rx; 1347 } 1348 1349 uint16_t 1350 virtio_recv_mergeable_pkts(void *rx_queue, 1351 struct rte_mbuf **rx_pkts, 1352 uint16_t nb_pkts) 1353 { 1354 struct virtnet_rx *rxvq = rx_queue; 1355 struct virtqueue *vq = rxvq->vq; 1356 struct virtio_hw *hw = vq->hw; 1357 struct rte_mbuf *rxm; 1358 struct rte_mbuf *prev = NULL; 1359 uint16_t nb_used, num, nb_rx = 0; 1360 uint32_t len[VIRTIO_MBUF_BURST_SZ]; 1361 struct rte_mbuf *rcv_pkts[VIRTIO_MBUF_BURST_SZ]; 1362 int error; 1363 uint32_t nb_enqueued = 0; 1364 uint32_t seg_num = 0; 1365 uint32_t seg_res = 0; 1366 uint32_t hdr_size = hw->vtnet_hdr_size; 1367 int32_t i; 1368 1369 if (unlikely(hw->started == 0)) 1370 return nb_rx; 1371 1372 nb_used = VIRTQUEUE_NUSED(vq); 1373 1374 virtio_rmb(hw->weak_barriers); 1375 1376 PMD_RX_LOG(DEBUG, "used:%d", nb_used); 1377 1378 num = likely(nb_used <= nb_pkts) ? nb_used : nb_pkts; 1379 if (unlikely(num > VIRTIO_MBUF_BURST_SZ)) 1380 num = VIRTIO_MBUF_BURST_SZ; 1381 if (likely(num > DESC_PER_CACHELINE)) 1382 num = num - ((vq->vq_used_cons_idx + num) % 1383 DESC_PER_CACHELINE); 1384 1385 1386 num = virtqueue_dequeue_burst_rx(vq, rcv_pkts, len, num); 1387 1388 for (i = 0; i < num; i++) { 1389 struct virtio_net_hdr_mrg_rxbuf *header; 1390 1391 PMD_RX_LOG(DEBUG, "dequeue:%d", num); 1392 PMD_RX_LOG(DEBUG, "packet len:%d", len[i]); 1393 1394 rxm = rcv_pkts[i]; 1395 1396 if (unlikely(len[i] < hdr_size + RTE_ETHER_HDR_LEN)) { 1397 PMD_RX_LOG(ERR, "Packet drop"); 1398 nb_enqueued++; 1399 virtio_discard_rxbuf(vq, rxm); 1400 rxvq->stats.errors++; 1401 continue; 1402 } 1403 1404 header = (struct virtio_net_hdr_mrg_rxbuf *) 1405 ((char *)rxm->buf_addr + RTE_PKTMBUF_HEADROOM 1406 - hdr_size); 1407 seg_num = header->num_buffers; 1408 if (seg_num == 0) 1409 seg_num = 1; 1410 1411 rxm->data_off = RTE_PKTMBUF_HEADROOM; 1412 rxm->nb_segs = seg_num; 1413 rxm->ol_flags = 0; 1414 rxm->vlan_tci = 0; 1415 rxm->pkt_len = (uint32_t)(len[i] - hdr_size); 1416 rxm->data_len = (uint16_t)(len[i] - hdr_size); 1417 1418 rxm->port = rxvq->port_id; 1419 1420 rx_pkts[nb_rx] = rxm; 1421 prev = rxm; 1422 1423 if (hw->has_rx_offload && 1424 virtio_rx_offload(rxm, &header->hdr) < 0) { 1425 virtio_discard_rxbuf(vq, rxm); 1426 rxvq->stats.errors++; 1427 continue; 1428 } 1429 1430 if (hw->vlan_strip) 1431 rte_vlan_strip(rx_pkts[nb_rx]); 1432 1433 seg_res = seg_num - 1; 1434 1435 /* Merge remaining segments */ 1436 while (seg_res != 0 && i < (num - 1)) { 1437 i++; 1438 1439 rxm = rcv_pkts[i]; 1440 rxm->data_off = RTE_PKTMBUF_HEADROOM - hdr_size; 1441 rxm->pkt_len = (uint32_t)(len[i]); 1442 rxm->data_len = (uint16_t)(len[i]); 1443 1444 rx_pkts[nb_rx]->pkt_len += (uint32_t)(len[i]); 1445 1446 prev->next = rxm; 1447 prev = rxm; 1448 seg_res -= 1; 1449 } 1450 1451 if (!seg_res) { 1452 virtio_rx_stats_updated(rxvq, rx_pkts[nb_rx]); 1453 nb_rx++; 1454 } 1455 } 1456 1457 /* Last packet still need merge segments */ 1458 while (seg_res != 0) { 1459 uint16_t rcv_cnt = RTE_MIN((uint16_t)seg_res, 1460 VIRTIO_MBUF_BURST_SZ); 1461 1462 if (likely(VIRTQUEUE_NUSED(vq) >= rcv_cnt)) { 1463 virtio_rmb(hw->weak_barriers); 1464 num = virtqueue_dequeue_burst_rx(vq, rcv_pkts, len, 1465 rcv_cnt); 1466 uint16_t extra_idx = 0; 1467 1468 rcv_cnt = num; 1469 while (extra_idx < rcv_cnt) { 1470 rxm = rcv_pkts[extra_idx]; 1471 rxm->data_off = 1472 RTE_PKTMBUF_HEADROOM - hdr_size; 1473 rxm->pkt_len = (uint32_t)(len[extra_idx]); 1474 rxm->data_len = (uint16_t)(len[extra_idx]); 1475 prev->next = rxm; 1476 prev = rxm; 1477 rx_pkts[nb_rx]->pkt_len += len[extra_idx]; 1478 extra_idx += 1; 1479 }; 1480 seg_res -= rcv_cnt; 1481 1482 if (!seg_res) { 1483 virtio_rx_stats_updated(rxvq, rx_pkts[nb_rx]); 1484 nb_rx++; 1485 } 1486 } else { 1487 PMD_RX_LOG(ERR, 1488 "No enough segments for packet."); 1489 rte_pktmbuf_free(rx_pkts[nb_rx]); 1490 rxvq->stats.errors++; 1491 break; 1492 } 1493 } 1494 1495 rxvq->stats.packets += nb_rx; 1496 1497 /* Allocate new mbuf for the used descriptor */ 1498 if (likely(!virtqueue_full(vq))) { 1499 /* free_cnt may include mrg descs */ 1500 uint16_t free_cnt = vq->vq_free_cnt; 1501 struct rte_mbuf *new_pkts[free_cnt]; 1502 1503 if (!rte_pktmbuf_alloc_bulk(rxvq->mpool, new_pkts, free_cnt)) { 1504 error = virtqueue_enqueue_recv_refill(vq, new_pkts, 1505 free_cnt); 1506 if (unlikely(error)) { 1507 for (i = 0; i < free_cnt; i++) 1508 rte_pktmbuf_free(new_pkts[i]); 1509 } 1510 nb_enqueued += free_cnt; 1511 } else { 1512 struct rte_eth_dev *dev = 1513 &rte_eth_devices[rxvq->port_id]; 1514 dev->data->rx_mbuf_alloc_failed += free_cnt; 1515 } 1516 } 1517 1518 if (likely(nb_enqueued)) { 1519 vq_update_avail_idx(vq); 1520 1521 if (unlikely(virtqueue_kick_prepare(vq))) { 1522 virtqueue_notify(vq); 1523 PMD_RX_LOG(DEBUG, "Notified"); 1524 } 1525 } 1526 1527 return nb_rx; 1528 } 1529 1530 uint16_t 1531 virtio_recv_mergeable_pkts_packed(void *rx_queue, 1532 struct rte_mbuf **rx_pkts, 1533 uint16_t nb_pkts) 1534 { 1535 struct virtnet_rx *rxvq = rx_queue; 1536 struct virtqueue *vq = rxvq->vq; 1537 struct virtio_hw *hw = vq->hw; 1538 struct rte_mbuf *rxm; 1539 struct rte_mbuf *prev = NULL; 1540 uint16_t num, nb_rx = 0; 1541 uint32_t len[VIRTIO_MBUF_BURST_SZ]; 1542 struct rte_mbuf *rcv_pkts[VIRTIO_MBUF_BURST_SZ]; 1543 uint32_t nb_enqueued = 0; 1544 uint32_t seg_num = 0; 1545 uint32_t seg_res = 0; 1546 uint32_t hdr_size = hw->vtnet_hdr_size; 1547 int32_t i; 1548 int error; 1549 1550 if (unlikely(hw->started == 0)) 1551 return nb_rx; 1552 1553 1554 num = nb_pkts; 1555 if (unlikely(num > VIRTIO_MBUF_BURST_SZ)) 1556 num = VIRTIO_MBUF_BURST_SZ; 1557 if (likely(num > DESC_PER_CACHELINE)) 1558 num = num - ((vq->vq_used_cons_idx + num) % DESC_PER_CACHELINE); 1559 1560 num = virtqueue_dequeue_burst_rx_packed(vq, rcv_pkts, len, num); 1561 1562 for (i = 0; i < num; i++) { 1563 struct virtio_net_hdr_mrg_rxbuf *header; 1564 1565 PMD_RX_LOG(DEBUG, "dequeue:%d", num); 1566 PMD_RX_LOG(DEBUG, "packet len:%d", len[i]); 1567 1568 rxm = rcv_pkts[i]; 1569 1570 if (unlikely(len[i] < hdr_size + RTE_ETHER_HDR_LEN)) { 1571 PMD_RX_LOG(ERR, "Packet drop"); 1572 nb_enqueued++; 1573 virtio_discard_rxbuf(vq, rxm); 1574 rxvq->stats.errors++; 1575 continue; 1576 } 1577 1578 header = (struct virtio_net_hdr_mrg_rxbuf *)((char *) 1579 rxm->buf_addr + RTE_PKTMBUF_HEADROOM - hdr_size); 1580 seg_num = header->num_buffers; 1581 1582 if (seg_num == 0) 1583 seg_num = 1; 1584 1585 rxm->data_off = RTE_PKTMBUF_HEADROOM; 1586 rxm->nb_segs = seg_num; 1587 rxm->ol_flags = 0; 1588 rxm->vlan_tci = 0; 1589 rxm->pkt_len = (uint32_t)(len[i] - hdr_size); 1590 rxm->data_len = (uint16_t)(len[i] - hdr_size); 1591 1592 rxm->port = rxvq->port_id; 1593 rx_pkts[nb_rx] = rxm; 1594 prev = rxm; 1595 1596 if (hw->has_rx_offload && 1597 virtio_rx_offload(rxm, &header->hdr) < 0) { 1598 virtio_discard_rxbuf(vq, rxm); 1599 rxvq->stats.errors++; 1600 continue; 1601 } 1602 1603 if (hw->vlan_strip) 1604 rte_vlan_strip(rx_pkts[nb_rx]); 1605 1606 seg_res = seg_num - 1; 1607 1608 /* Merge remaining segments */ 1609 while (seg_res != 0 && i < (num - 1)) { 1610 i++; 1611 1612 rxm = rcv_pkts[i]; 1613 rxm->data_off = RTE_PKTMBUF_HEADROOM - hdr_size; 1614 rxm->pkt_len = (uint32_t)(len[i]); 1615 rxm->data_len = (uint16_t)(len[i]); 1616 1617 rx_pkts[nb_rx]->pkt_len += (uint32_t)(len[i]); 1618 1619 prev->next = rxm; 1620 prev = rxm; 1621 seg_res -= 1; 1622 } 1623 1624 if (!seg_res) { 1625 virtio_rx_stats_updated(rxvq, rx_pkts[nb_rx]); 1626 nb_rx++; 1627 } 1628 } 1629 1630 /* Last packet still need merge segments */ 1631 while (seg_res != 0) { 1632 uint16_t rcv_cnt = RTE_MIN((uint16_t)seg_res, 1633 VIRTIO_MBUF_BURST_SZ); 1634 uint16_t extra_idx = 0; 1635 1636 rcv_cnt = virtqueue_dequeue_burst_rx_packed(vq, rcv_pkts, 1637 len, rcv_cnt); 1638 if (unlikely(rcv_cnt == 0)) { 1639 PMD_RX_LOG(ERR, "No enough segments for packet."); 1640 rte_pktmbuf_free(rx_pkts[nb_rx]); 1641 rxvq->stats.errors++; 1642 break; 1643 } 1644 1645 while (extra_idx < rcv_cnt) { 1646 rxm = rcv_pkts[extra_idx]; 1647 1648 rxm->data_off = RTE_PKTMBUF_HEADROOM - hdr_size; 1649 rxm->pkt_len = (uint32_t)(len[extra_idx]); 1650 rxm->data_len = (uint16_t)(len[extra_idx]); 1651 1652 prev->next = rxm; 1653 prev = rxm; 1654 rx_pkts[nb_rx]->pkt_len += len[extra_idx]; 1655 extra_idx += 1; 1656 } 1657 seg_res -= rcv_cnt; 1658 if (!seg_res) { 1659 virtio_rx_stats_updated(rxvq, rx_pkts[nb_rx]); 1660 nb_rx++; 1661 } 1662 } 1663 1664 rxvq->stats.packets += nb_rx; 1665 1666 /* Allocate new mbuf for the used descriptor */ 1667 if (likely(!virtqueue_full(vq))) { 1668 /* free_cnt may include mrg descs */ 1669 uint16_t free_cnt = vq->vq_free_cnt; 1670 struct rte_mbuf *new_pkts[free_cnt]; 1671 1672 if (!rte_pktmbuf_alloc_bulk(rxvq->mpool, new_pkts, free_cnt)) { 1673 error = virtqueue_enqueue_recv_refill_packed(vq, 1674 new_pkts, free_cnt); 1675 if (unlikely(error)) { 1676 for (i = 0; i < free_cnt; i++) 1677 rte_pktmbuf_free(new_pkts[i]); 1678 } 1679 nb_enqueued += free_cnt; 1680 } else { 1681 struct rte_eth_dev *dev = 1682 &rte_eth_devices[rxvq->port_id]; 1683 dev->data->rx_mbuf_alloc_failed += free_cnt; 1684 } 1685 } 1686 1687 if (likely(nb_enqueued)) { 1688 if (unlikely(virtqueue_kick_prepare_packed(vq))) { 1689 virtqueue_notify(vq); 1690 PMD_RX_LOG(DEBUG, "Notified"); 1691 } 1692 } 1693 1694 return nb_rx; 1695 } 1696 1697 uint16_t 1698 virtio_xmit_pkts_prepare(void *tx_queue __rte_unused, struct rte_mbuf **tx_pkts, 1699 uint16_t nb_pkts) 1700 { 1701 uint16_t nb_tx; 1702 int error; 1703 1704 for (nb_tx = 0; nb_tx < nb_pkts; nb_tx++) { 1705 struct rte_mbuf *m = tx_pkts[nb_tx]; 1706 1707 #ifdef RTE_LIBRTE_ETHDEV_DEBUG 1708 error = rte_validate_tx_offload(m); 1709 if (unlikely(error)) { 1710 rte_errno = -error; 1711 break; 1712 } 1713 #endif 1714 1715 /* Do VLAN tag insertion */ 1716 if (unlikely(m->ol_flags & PKT_TX_VLAN_PKT)) { 1717 error = rte_vlan_insert(&m); 1718 /* rte_vlan_insert() may change pointer 1719 * even in the case of failure 1720 */ 1721 tx_pkts[nb_tx] = m; 1722 1723 if (unlikely(error)) { 1724 rte_errno = -error; 1725 break; 1726 } 1727 } 1728 1729 error = rte_net_intel_cksum_prepare(m); 1730 if (unlikely(error)) { 1731 rte_errno = -error; 1732 break; 1733 } 1734 1735 if (m->ol_flags & PKT_TX_TCP_SEG) 1736 virtio_tso_fix_cksum(m); 1737 } 1738 1739 return nb_tx; 1740 } 1741 1742 uint16_t 1743 virtio_xmit_pkts_packed(void *tx_queue, struct rte_mbuf **tx_pkts, 1744 uint16_t nb_pkts) 1745 { 1746 struct virtnet_tx *txvq = tx_queue; 1747 struct virtqueue *vq = txvq->vq; 1748 struct virtio_hw *hw = vq->hw; 1749 uint16_t hdr_size = hw->vtnet_hdr_size; 1750 uint16_t nb_tx = 0; 1751 bool in_order = vtpci_with_feature(hw, VIRTIO_F_IN_ORDER); 1752 1753 if (unlikely(hw->started == 0 && tx_pkts != hw->inject_pkts)) 1754 return nb_tx; 1755 1756 if (unlikely(nb_pkts < 1)) 1757 return nb_pkts; 1758 1759 PMD_TX_LOG(DEBUG, "%d packets to xmit", nb_pkts); 1760 1761 if (nb_pkts > vq->vq_free_cnt) 1762 virtio_xmit_cleanup_packed(vq, nb_pkts - vq->vq_free_cnt, 1763 in_order); 1764 1765 for (nb_tx = 0; nb_tx < nb_pkts; nb_tx++) { 1766 struct rte_mbuf *txm = tx_pkts[nb_tx]; 1767 int can_push = 0, slots, need; 1768 1769 /* optimize ring usage */ 1770 if ((vtpci_with_feature(hw, VIRTIO_F_ANY_LAYOUT) || 1771 vtpci_with_feature(hw, VIRTIO_F_VERSION_1)) && 1772 rte_mbuf_refcnt_read(txm) == 1 && 1773 RTE_MBUF_DIRECT(txm) && 1774 txm->nb_segs == 1 && 1775 rte_pktmbuf_headroom(txm) >= hdr_size && 1776 rte_is_aligned(rte_pktmbuf_mtod(txm, char *), 1777 __alignof__(struct virtio_net_hdr_mrg_rxbuf))) 1778 can_push = 1; 1779 1780 /* How many main ring entries are needed to this Tx? 1781 * any_layout => number of segments 1782 * default => number of segments + 1 1783 */ 1784 slots = txm->nb_segs + !can_push; 1785 need = slots - vq->vq_free_cnt; 1786 1787 /* Positive value indicates it need free vring descriptors */ 1788 if (unlikely(need > 0)) { 1789 virtio_xmit_cleanup_packed(vq, need, in_order); 1790 need = slots - vq->vq_free_cnt; 1791 if (unlikely(need > 0)) { 1792 PMD_TX_LOG(ERR, 1793 "No free tx descriptors to transmit"); 1794 break; 1795 } 1796 } 1797 1798 /* Enqueue Packet buffers */ 1799 if (can_push) 1800 virtqueue_enqueue_xmit_packed_fast(txvq, txm, in_order); 1801 else 1802 virtqueue_enqueue_xmit_packed(txvq, txm, slots, 0, 1803 in_order); 1804 1805 virtio_update_packet_stats(&txvq->stats, txm); 1806 } 1807 1808 txvq->stats.packets += nb_tx; 1809 1810 if (likely(nb_tx)) { 1811 if (unlikely(virtqueue_kick_prepare_packed(vq))) { 1812 virtqueue_notify(vq); 1813 PMD_TX_LOG(DEBUG, "Notified backend after xmit"); 1814 } 1815 } 1816 1817 return nb_tx; 1818 } 1819 1820 uint16_t 1821 virtio_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts, uint16_t nb_pkts) 1822 { 1823 struct virtnet_tx *txvq = tx_queue; 1824 struct virtqueue *vq = txvq->vq; 1825 struct virtio_hw *hw = vq->hw; 1826 uint16_t hdr_size = hw->vtnet_hdr_size; 1827 uint16_t nb_used, nb_tx = 0; 1828 1829 if (unlikely(hw->started == 0 && tx_pkts != hw->inject_pkts)) 1830 return nb_tx; 1831 1832 if (unlikely(nb_pkts < 1)) 1833 return nb_pkts; 1834 1835 PMD_TX_LOG(DEBUG, "%d packets to xmit", nb_pkts); 1836 nb_used = VIRTQUEUE_NUSED(vq); 1837 1838 virtio_rmb(hw->weak_barriers); 1839 if (likely(nb_used > vq->vq_nentries - vq->vq_free_thresh)) 1840 virtio_xmit_cleanup(vq, nb_used); 1841 1842 for (nb_tx = 0; nb_tx < nb_pkts; nb_tx++) { 1843 struct rte_mbuf *txm = tx_pkts[nb_tx]; 1844 int can_push = 0, use_indirect = 0, slots, need; 1845 1846 /* optimize ring usage */ 1847 if ((vtpci_with_feature(hw, VIRTIO_F_ANY_LAYOUT) || 1848 vtpci_with_feature(hw, VIRTIO_F_VERSION_1)) && 1849 rte_mbuf_refcnt_read(txm) == 1 && 1850 RTE_MBUF_DIRECT(txm) && 1851 txm->nb_segs == 1 && 1852 rte_pktmbuf_headroom(txm) >= hdr_size && 1853 rte_is_aligned(rte_pktmbuf_mtod(txm, char *), 1854 __alignof__(struct virtio_net_hdr_mrg_rxbuf))) 1855 can_push = 1; 1856 else if (vtpci_with_feature(hw, VIRTIO_RING_F_INDIRECT_DESC) && 1857 txm->nb_segs < VIRTIO_MAX_TX_INDIRECT) 1858 use_indirect = 1; 1859 1860 /* How many main ring entries are needed to this Tx? 1861 * any_layout => number of segments 1862 * indirect => 1 1863 * default => number of segments + 1 1864 */ 1865 slots = use_indirect ? 1 : (txm->nb_segs + !can_push); 1866 need = slots - vq->vq_free_cnt; 1867 1868 /* Positive value indicates it need free vring descriptors */ 1869 if (unlikely(need > 0)) { 1870 nb_used = VIRTQUEUE_NUSED(vq); 1871 virtio_rmb(hw->weak_barriers); 1872 need = RTE_MIN(need, (int)nb_used); 1873 1874 virtio_xmit_cleanup(vq, need); 1875 need = slots - vq->vq_free_cnt; 1876 if (unlikely(need > 0)) { 1877 PMD_TX_LOG(ERR, 1878 "No free tx descriptors to transmit"); 1879 break; 1880 } 1881 } 1882 1883 /* Enqueue Packet buffers */ 1884 virtqueue_enqueue_xmit(txvq, txm, slots, use_indirect, 1885 can_push, 0); 1886 1887 virtio_update_packet_stats(&txvq->stats, txm); 1888 } 1889 1890 txvq->stats.packets += nb_tx; 1891 1892 if (likely(nb_tx)) { 1893 vq_update_avail_idx(vq); 1894 1895 if (unlikely(virtqueue_kick_prepare(vq))) { 1896 virtqueue_notify(vq); 1897 PMD_TX_LOG(DEBUG, "Notified backend after xmit"); 1898 } 1899 } 1900 1901 return nb_tx; 1902 } 1903 1904 static __rte_always_inline int 1905 virtio_xmit_try_cleanup_inorder(struct virtqueue *vq, uint16_t need) 1906 { 1907 uint16_t nb_used, nb_clean, nb_descs; 1908 struct virtio_hw *hw = vq->hw; 1909 1910 nb_descs = vq->vq_free_cnt + need; 1911 nb_used = VIRTQUEUE_NUSED(vq); 1912 virtio_rmb(hw->weak_barriers); 1913 nb_clean = RTE_MIN(need, (int)nb_used); 1914 1915 virtio_xmit_cleanup_inorder(vq, nb_clean); 1916 1917 return nb_descs - vq->vq_free_cnt; 1918 } 1919 1920 uint16_t 1921 virtio_xmit_pkts_inorder(void *tx_queue, 1922 struct rte_mbuf **tx_pkts, 1923 uint16_t nb_pkts) 1924 { 1925 struct virtnet_tx *txvq = tx_queue; 1926 struct virtqueue *vq = txvq->vq; 1927 struct virtio_hw *hw = vq->hw; 1928 uint16_t hdr_size = hw->vtnet_hdr_size; 1929 uint16_t nb_used, nb_tx = 0, nb_inorder_pkts = 0; 1930 struct rte_mbuf *inorder_pkts[nb_pkts]; 1931 int need; 1932 1933 if (unlikely(hw->started == 0 && tx_pkts != hw->inject_pkts)) 1934 return nb_tx; 1935 1936 if (unlikely(nb_pkts < 1)) 1937 return nb_pkts; 1938 1939 VIRTQUEUE_DUMP(vq); 1940 PMD_TX_LOG(DEBUG, "%d packets to xmit", nb_pkts); 1941 nb_used = VIRTQUEUE_NUSED(vq); 1942 1943 virtio_rmb(hw->weak_barriers); 1944 if (likely(nb_used > vq->vq_nentries - vq->vq_free_thresh)) 1945 virtio_xmit_cleanup_inorder(vq, nb_used); 1946 1947 for (nb_tx = 0; nb_tx < nb_pkts; nb_tx++) { 1948 struct rte_mbuf *txm = tx_pkts[nb_tx]; 1949 int slots; 1950 1951 /* optimize ring usage */ 1952 if ((vtpci_with_feature(hw, VIRTIO_F_ANY_LAYOUT) || 1953 vtpci_with_feature(hw, VIRTIO_F_VERSION_1)) && 1954 rte_mbuf_refcnt_read(txm) == 1 && 1955 RTE_MBUF_DIRECT(txm) && 1956 txm->nb_segs == 1 && 1957 rte_pktmbuf_headroom(txm) >= hdr_size && 1958 rte_is_aligned(rte_pktmbuf_mtod(txm, char *), 1959 __alignof__(struct virtio_net_hdr_mrg_rxbuf))) { 1960 inorder_pkts[nb_inorder_pkts] = txm; 1961 nb_inorder_pkts++; 1962 1963 continue; 1964 } 1965 1966 if (nb_inorder_pkts) { 1967 need = nb_inorder_pkts - vq->vq_free_cnt; 1968 if (unlikely(need > 0)) { 1969 need = virtio_xmit_try_cleanup_inorder(vq, 1970 need); 1971 if (unlikely(need > 0)) { 1972 PMD_TX_LOG(ERR, 1973 "No free tx descriptors to " 1974 "transmit"); 1975 break; 1976 } 1977 } 1978 virtqueue_enqueue_xmit_inorder(txvq, inorder_pkts, 1979 nb_inorder_pkts); 1980 nb_inorder_pkts = 0; 1981 } 1982 1983 slots = txm->nb_segs + 1; 1984 need = slots - vq->vq_free_cnt; 1985 if (unlikely(need > 0)) { 1986 need = virtio_xmit_try_cleanup_inorder(vq, slots); 1987 1988 if (unlikely(need > 0)) { 1989 PMD_TX_LOG(ERR, 1990 "No free tx descriptors to transmit"); 1991 break; 1992 } 1993 } 1994 /* Enqueue Packet buffers */ 1995 virtqueue_enqueue_xmit(txvq, txm, slots, 0, 0, 1); 1996 1997 virtio_update_packet_stats(&txvq->stats, txm); 1998 } 1999 2000 /* Transmit all inorder packets */ 2001 if (nb_inorder_pkts) { 2002 need = nb_inorder_pkts - vq->vq_free_cnt; 2003 if (unlikely(need > 0)) { 2004 need = virtio_xmit_try_cleanup_inorder(vq, 2005 need); 2006 if (unlikely(need > 0)) { 2007 PMD_TX_LOG(ERR, 2008 "No free tx descriptors to transmit"); 2009 nb_inorder_pkts = vq->vq_free_cnt; 2010 nb_tx -= need; 2011 } 2012 } 2013 2014 virtqueue_enqueue_xmit_inorder(txvq, inorder_pkts, 2015 nb_inorder_pkts); 2016 } 2017 2018 txvq->stats.packets += nb_tx; 2019 2020 if (likely(nb_tx)) { 2021 vq_update_avail_idx(vq); 2022 2023 if (unlikely(virtqueue_kick_prepare(vq))) { 2024 virtqueue_notify(vq); 2025 PMD_TX_LOG(DEBUG, "Notified backend after xmit"); 2026 } 2027 } 2028 2029 VIRTQUEUE_DUMP(vq); 2030 2031 return nb_tx; 2032 } 2033 2034 #ifndef CC_AVX512_SUPPORT 2035 uint16_t 2036 virtio_recv_pkts_packed_vec(void *rx_queue __rte_unused, 2037 struct rte_mbuf **rx_pkts __rte_unused, 2038 uint16_t nb_pkts __rte_unused) 2039 { 2040 return 0; 2041 } 2042 #endif /* ifndef CC_AVX512_SUPPORT */ 2043