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_io_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 num = likely(nb_used <= nb_pkts) ? nb_used : nb_pkts; 974 if (unlikely(num > VIRTIO_MBUF_BURST_SZ)) 975 num = VIRTIO_MBUF_BURST_SZ; 976 if (likely(num > DESC_PER_CACHELINE)) 977 num = num - ((vq->vq_used_cons_idx + num) % DESC_PER_CACHELINE); 978 979 num = virtqueue_dequeue_burst_rx(vq, rcv_pkts, len, num); 980 PMD_RX_LOG(DEBUG, "used:%d dequeue:%d", nb_used, num); 981 982 nb_enqueued = 0; 983 hdr_size = hw->vtnet_hdr_size; 984 985 for (i = 0; i < num ; i++) { 986 rxm = rcv_pkts[i]; 987 988 PMD_RX_LOG(DEBUG, "packet len:%d", len[i]); 989 990 if (unlikely(len[i] < hdr_size + RTE_ETHER_HDR_LEN)) { 991 PMD_RX_LOG(ERR, "Packet drop"); 992 nb_enqueued++; 993 virtio_discard_rxbuf(vq, rxm); 994 rxvq->stats.errors++; 995 continue; 996 } 997 998 rxm->port = rxvq->port_id; 999 rxm->data_off = RTE_PKTMBUF_HEADROOM; 1000 rxm->ol_flags = 0; 1001 rxm->vlan_tci = 0; 1002 1003 rxm->pkt_len = (uint32_t)(len[i] - hdr_size); 1004 rxm->data_len = (uint16_t)(len[i] - hdr_size); 1005 1006 hdr = (struct virtio_net_hdr *)((char *)rxm->buf_addr + 1007 RTE_PKTMBUF_HEADROOM - hdr_size); 1008 1009 if (hw->vlan_strip) 1010 rte_vlan_strip(rxm); 1011 1012 if (hw->has_rx_offload && virtio_rx_offload(rxm, hdr) < 0) { 1013 virtio_discard_rxbuf(vq, rxm); 1014 rxvq->stats.errors++; 1015 continue; 1016 } 1017 1018 virtio_rx_stats_updated(rxvq, rxm); 1019 1020 rx_pkts[nb_rx++] = rxm; 1021 } 1022 1023 rxvq->stats.packets += nb_rx; 1024 1025 /* Allocate new mbuf for the used descriptor */ 1026 if (likely(!virtqueue_full(vq))) { 1027 uint16_t free_cnt = vq->vq_free_cnt; 1028 struct rte_mbuf *new_pkts[free_cnt]; 1029 1030 if (likely(rte_pktmbuf_alloc_bulk(rxvq->mpool, new_pkts, 1031 free_cnt) == 0)) { 1032 error = virtqueue_enqueue_recv_refill(vq, new_pkts, 1033 free_cnt); 1034 if (unlikely(error)) { 1035 for (i = 0; i < free_cnt; i++) 1036 rte_pktmbuf_free(new_pkts[i]); 1037 } 1038 nb_enqueued += free_cnt; 1039 } else { 1040 struct rte_eth_dev *dev = 1041 &rte_eth_devices[rxvq->port_id]; 1042 dev->data->rx_mbuf_alloc_failed += free_cnt; 1043 } 1044 } 1045 1046 if (likely(nb_enqueued)) { 1047 vq_update_avail_idx(vq); 1048 1049 if (unlikely(virtqueue_kick_prepare(vq))) { 1050 virtqueue_notify(vq); 1051 PMD_RX_LOG(DEBUG, "Notified"); 1052 } 1053 } 1054 1055 return nb_rx; 1056 } 1057 1058 uint16_t 1059 virtio_recv_pkts_packed(void *rx_queue, struct rte_mbuf **rx_pkts, 1060 uint16_t nb_pkts) 1061 { 1062 struct virtnet_rx *rxvq = rx_queue; 1063 struct virtqueue *vq = rxvq->vq; 1064 struct virtio_hw *hw = vq->hw; 1065 struct rte_mbuf *rxm; 1066 uint16_t num, nb_rx; 1067 uint32_t len[VIRTIO_MBUF_BURST_SZ]; 1068 struct rte_mbuf *rcv_pkts[VIRTIO_MBUF_BURST_SZ]; 1069 int error; 1070 uint32_t i, nb_enqueued; 1071 uint32_t hdr_size; 1072 struct virtio_net_hdr *hdr; 1073 1074 nb_rx = 0; 1075 if (unlikely(hw->started == 0)) 1076 return nb_rx; 1077 1078 num = RTE_MIN(VIRTIO_MBUF_BURST_SZ, nb_pkts); 1079 if (likely(num > DESC_PER_CACHELINE)) 1080 num = num - ((vq->vq_used_cons_idx + num) % DESC_PER_CACHELINE); 1081 1082 num = virtqueue_dequeue_burst_rx_packed(vq, rcv_pkts, len, num); 1083 PMD_RX_LOG(DEBUG, "dequeue:%d", num); 1084 1085 nb_enqueued = 0; 1086 hdr_size = hw->vtnet_hdr_size; 1087 1088 for (i = 0; i < num; i++) { 1089 rxm = rcv_pkts[i]; 1090 1091 PMD_RX_LOG(DEBUG, "packet len:%d", len[i]); 1092 1093 if (unlikely(len[i] < hdr_size + RTE_ETHER_HDR_LEN)) { 1094 PMD_RX_LOG(ERR, "Packet drop"); 1095 nb_enqueued++; 1096 virtio_discard_rxbuf(vq, rxm); 1097 rxvq->stats.errors++; 1098 continue; 1099 } 1100 1101 rxm->port = rxvq->port_id; 1102 rxm->data_off = RTE_PKTMBUF_HEADROOM; 1103 rxm->ol_flags = 0; 1104 rxm->vlan_tci = 0; 1105 1106 rxm->pkt_len = (uint32_t)(len[i] - hdr_size); 1107 rxm->data_len = (uint16_t)(len[i] - hdr_size); 1108 1109 hdr = (struct virtio_net_hdr *)((char *)rxm->buf_addr + 1110 RTE_PKTMBUF_HEADROOM - hdr_size); 1111 1112 if (hw->vlan_strip) 1113 rte_vlan_strip(rxm); 1114 1115 if (hw->has_rx_offload && virtio_rx_offload(rxm, hdr) < 0) { 1116 virtio_discard_rxbuf(vq, rxm); 1117 rxvq->stats.errors++; 1118 continue; 1119 } 1120 1121 virtio_rx_stats_updated(rxvq, rxm); 1122 1123 rx_pkts[nb_rx++] = rxm; 1124 } 1125 1126 rxvq->stats.packets += nb_rx; 1127 1128 /* Allocate new mbuf for the used descriptor */ 1129 if (likely(!virtqueue_full(vq))) { 1130 uint16_t free_cnt = vq->vq_free_cnt; 1131 struct rte_mbuf *new_pkts[free_cnt]; 1132 1133 if (likely(rte_pktmbuf_alloc_bulk(rxvq->mpool, new_pkts, 1134 free_cnt) == 0)) { 1135 error = virtqueue_enqueue_recv_refill_packed(vq, 1136 new_pkts, free_cnt); 1137 if (unlikely(error)) { 1138 for (i = 0; i < free_cnt; i++) 1139 rte_pktmbuf_free(new_pkts[i]); 1140 } 1141 nb_enqueued += free_cnt; 1142 } else { 1143 struct rte_eth_dev *dev = 1144 &rte_eth_devices[rxvq->port_id]; 1145 dev->data->rx_mbuf_alloc_failed += free_cnt; 1146 } 1147 } 1148 1149 if (likely(nb_enqueued)) { 1150 if (unlikely(virtqueue_kick_prepare_packed(vq))) { 1151 virtqueue_notify(vq); 1152 PMD_RX_LOG(DEBUG, "Notified"); 1153 } 1154 } 1155 1156 return nb_rx; 1157 } 1158 1159 1160 uint16_t 1161 virtio_recv_pkts_inorder(void *rx_queue, 1162 struct rte_mbuf **rx_pkts, 1163 uint16_t nb_pkts) 1164 { 1165 struct virtnet_rx *rxvq = rx_queue; 1166 struct virtqueue *vq = rxvq->vq; 1167 struct virtio_hw *hw = vq->hw; 1168 struct rte_mbuf *rxm; 1169 struct rte_mbuf *prev = NULL; 1170 uint16_t nb_used, num, nb_rx; 1171 uint32_t len[VIRTIO_MBUF_BURST_SZ]; 1172 struct rte_mbuf *rcv_pkts[VIRTIO_MBUF_BURST_SZ]; 1173 int error; 1174 uint32_t nb_enqueued; 1175 uint32_t seg_num; 1176 uint32_t seg_res; 1177 uint32_t hdr_size; 1178 int32_t i; 1179 1180 nb_rx = 0; 1181 if (unlikely(hw->started == 0)) 1182 return nb_rx; 1183 1184 nb_used = virtqueue_nused(vq); 1185 nb_used = RTE_MIN(nb_used, nb_pkts); 1186 nb_used = RTE_MIN(nb_used, VIRTIO_MBUF_BURST_SZ); 1187 1188 PMD_RX_LOG(DEBUG, "used:%d", nb_used); 1189 1190 nb_enqueued = 0; 1191 seg_num = 1; 1192 seg_res = 0; 1193 hdr_size = hw->vtnet_hdr_size; 1194 1195 num = virtqueue_dequeue_rx_inorder(vq, rcv_pkts, len, nb_used); 1196 1197 for (i = 0; i < num; i++) { 1198 struct virtio_net_hdr_mrg_rxbuf *header; 1199 1200 PMD_RX_LOG(DEBUG, "dequeue:%d", num); 1201 PMD_RX_LOG(DEBUG, "packet len:%d", len[i]); 1202 1203 rxm = rcv_pkts[i]; 1204 1205 if (unlikely(len[i] < hdr_size + RTE_ETHER_HDR_LEN)) { 1206 PMD_RX_LOG(ERR, "Packet drop"); 1207 nb_enqueued++; 1208 virtio_discard_rxbuf_inorder(vq, rxm); 1209 rxvq->stats.errors++; 1210 continue; 1211 } 1212 1213 header = (struct virtio_net_hdr_mrg_rxbuf *) 1214 ((char *)rxm->buf_addr + RTE_PKTMBUF_HEADROOM 1215 - hdr_size); 1216 1217 if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF)) { 1218 seg_num = header->num_buffers; 1219 if (seg_num == 0) 1220 seg_num = 1; 1221 } else { 1222 seg_num = 1; 1223 } 1224 1225 rxm->data_off = RTE_PKTMBUF_HEADROOM; 1226 rxm->nb_segs = seg_num; 1227 rxm->ol_flags = 0; 1228 rxm->vlan_tci = 0; 1229 rxm->pkt_len = (uint32_t)(len[i] - hdr_size); 1230 rxm->data_len = (uint16_t)(len[i] - hdr_size); 1231 1232 rxm->port = rxvq->port_id; 1233 1234 rx_pkts[nb_rx] = rxm; 1235 prev = rxm; 1236 1237 if (vq->hw->has_rx_offload && 1238 virtio_rx_offload(rxm, &header->hdr) < 0) { 1239 virtio_discard_rxbuf_inorder(vq, rxm); 1240 rxvq->stats.errors++; 1241 continue; 1242 } 1243 1244 if (hw->vlan_strip) 1245 rte_vlan_strip(rx_pkts[nb_rx]); 1246 1247 seg_res = seg_num - 1; 1248 1249 /* Merge remaining segments */ 1250 while (seg_res != 0 && i < (num - 1)) { 1251 i++; 1252 1253 rxm = rcv_pkts[i]; 1254 rxm->data_off = RTE_PKTMBUF_HEADROOM - hdr_size; 1255 rxm->pkt_len = (uint32_t)(len[i]); 1256 rxm->data_len = (uint16_t)(len[i]); 1257 1258 rx_pkts[nb_rx]->pkt_len += (uint32_t)(len[i]); 1259 1260 prev->next = rxm; 1261 prev = rxm; 1262 seg_res -= 1; 1263 } 1264 1265 if (!seg_res) { 1266 virtio_rx_stats_updated(rxvq, rx_pkts[nb_rx]); 1267 nb_rx++; 1268 } 1269 } 1270 1271 /* Last packet still need merge segments */ 1272 while (seg_res != 0) { 1273 uint16_t rcv_cnt = RTE_MIN((uint16_t)seg_res, 1274 VIRTIO_MBUF_BURST_SZ); 1275 1276 if (likely(virtqueue_nused(vq) >= rcv_cnt)) { 1277 num = virtqueue_dequeue_rx_inorder(vq, rcv_pkts, len, 1278 rcv_cnt); 1279 uint16_t extra_idx = 0; 1280 1281 rcv_cnt = num; 1282 while (extra_idx < rcv_cnt) { 1283 rxm = rcv_pkts[extra_idx]; 1284 rxm->data_off = 1285 RTE_PKTMBUF_HEADROOM - hdr_size; 1286 rxm->pkt_len = (uint32_t)(len[extra_idx]); 1287 rxm->data_len = (uint16_t)(len[extra_idx]); 1288 prev->next = rxm; 1289 prev = rxm; 1290 rx_pkts[nb_rx]->pkt_len += len[extra_idx]; 1291 extra_idx += 1; 1292 }; 1293 seg_res -= rcv_cnt; 1294 1295 if (!seg_res) { 1296 virtio_rx_stats_updated(rxvq, rx_pkts[nb_rx]); 1297 nb_rx++; 1298 } 1299 } else { 1300 PMD_RX_LOG(ERR, 1301 "No enough segments for packet."); 1302 rte_pktmbuf_free(rx_pkts[nb_rx]); 1303 rxvq->stats.errors++; 1304 break; 1305 } 1306 } 1307 1308 rxvq->stats.packets += nb_rx; 1309 1310 /* Allocate new mbuf for the used descriptor */ 1311 1312 if (likely(!virtqueue_full(vq))) { 1313 /* free_cnt may include mrg descs */ 1314 uint16_t free_cnt = vq->vq_free_cnt; 1315 struct rte_mbuf *new_pkts[free_cnt]; 1316 1317 if (!rte_pktmbuf_alloc_bulk(rxvq->mpool, new_pkts, free_cnt)) { 1318 error = virtqueue_enqueue_refill_inorder(vq, new_pkts, 1319 free_cnt); 1320 if (unlikely(error)) { 1321 for (i = 0; i < free_cnt; i++) 1322 rte_pktmbuf_free(new_pkts[i]); 1323 } 1324 nb_enqueued += free_cnt; 1325 } else { 1326 struct rte_eth_dev *dev = 1327 &rte_eth_devices[rxvq->port_id]; 1328 dev->data->rx_mbuf_alloc_failed += free_cnt; 1329 } 1330 } 1331 1332 if (likely(nb_enqueued)) { 1333 vq_update_avail_idx(vq); 1334 1335 if (unlikely(virtqueue_kick_prepare(vq))) { 1336 virtqueue_notify(vq); 1337 PMD_RX_LOG(DEBUG, "Notified"); 1338 } 1339 } 1340 1341 return nb_rx; 1342 } 1343 1344 uint16_t 1345 virtio_recv_mergeable_pkts(void *rx_queue, 1346 struct rte_mbuf **rx_pkts, 1347 uint16_t nb_pkts) 1348 { 1349 struct virtnet_rx *rxvq = rx_queue; 1350 struct virtqueue *vq = rxvq->vq; 1351 struct virtio_hw *hw = vq->hw; 1352 struct rte_mbuf *rxm; 1353 struct rte_mbuf *prev = NULL; 1354 uint16_t nb_used, num, nb_rx = 0; 1355 uint32_t len[VIRTIO_MBUF_BURST_SZ]; 1356 struct rte_mbuf *rcv_pkts[VIRTIO_MBUF_BURST_SZ]; 1357 int error; 1358 uint32_t nb_enqueued = 0; 1359 uint32_t seg_num = 0; 1360 uint32_t seg_res = 0; 1361 uint32_t hdr_size = hw->vtnet_hdr_size; 1362 int32_t i; 1363 1364 if (unlikely(hw->started == 0)) 1365 return nb_rx; 1366 1367 nb_used = virtqueue_nused(vq); 1368 1369 PMD_RX_LOG(DEBUG, "used:%d", nb_used); 1370 1371 num = likely(nb_used <= nb_pkts) ? nb_used : nb_pkts; 1372 if (unlikely(num > VIRTIO_MBUF_BURST_SZ)) 1373 num = VIRTIO_MBUF_BURST_SZ; 1374 if (likely(num > DESC_PER_CACHELINE)) 1375 num = num - ((vq->vq_used_cons_idx + num) % 1376 DESC_PER_CACHELINE); 1377 1378 1379 num = virtqueue_dequeue_burst_rx(vq, rcv_pkts, len, num); 1380 1381 for (i = 0; i < num; i++) { 1382 struct virtio_net_hdr_mrg_rxbuf *header; 1383 1384 PMD_RX_LOG(DEBUG, "dequeue:%d", num); 1385 PMD_RX_LOG(DEBUG, "packet len:%d", len[i]); 1386 1387 rxm = rcv_pkts[i]; 1388 1389 if (unlikely(len[i] < hdr_size + RTE_ETHER_HDR_LEN)) { 1390 PMD_RX_LOG(ERR, "Packet drop"); 1391 nb_enqueued++; 1392 virtio_discard_rxbuf(vq, rxm); 1393 rxvq->stats.errors++; 1394 continue; 1395 } 1396 1397 header = (struct virtio_net_hdr_mrg_rxbuf *) 1398 ((char *)rxm->buf_addr + RTE_PKTMBUF_HEADROOM 1399 - hdr_size); 1400 seg_num = header->num_buffers; 1401 if (seg_num == 0) 1402 seg_num = 1; 1403 1404 rxm->data_off = RTE_PKTMBUF_HEADROOM; 1405 rxm->nb_segs = seg_num; 1406 rxm->ol_flags = 0; 1407 rxm->vlan_tci = 0; 1408 rxm->pkt_len = (uint32_t)(len[i] - hdr_size); 1409 rxm->data_len = (uint16_t)(len[i] - hdr_size); 1410 1411 rxm->port = rxvq->port_id; 1412 1413 rx_pkts[nb_rx] = rxm; 1414 prev = rxm; 1415 1416 if (hw->has_rx_offload && 1417 virtio_rx_offload(rxm, &header->hdr) < 0) { 1418 virtio_discard_rxbuf(vq, rxm); 1419 rxvq->stats.errors++; 1420 continue; 1421 } 1422 1423 if (hw->vlan_strip) 1424 rte_vlan_strip(rx_pkts[nb_rx]); 1425 1426 seg_res = seg_num - 1; 1427 1428 /* Merge remaining segments */ 1429 while (seg_res != 0 && i < (num - 1)) { 1430 i++; 1431 1432 rxm = rcv_pkts[i]; 1433 rxm->data_off = RTE_PKTMBUF_HEADROOM - hdr_size; 1434 rxm->pkt_len = (uint32_t)(len[i]); 1435 rxm->data_len = (uint16_t)(len[i]); 1436 1437 rx_pkts[nb_rx]->pkt_len += (uint32_t)(len[i]); 1438 1439 prev->next = rxm; 1440 prev = rxm; 1441 seg_res -= 1; 1442 } 1443 1444 if (!seg_res) { 1445 virtio_rx_stats_updated(rxvq, rx_pkts[nb_rx]); 1446 nb_rx++; 1447 } 1448 } 1449 1450 /* Last packet still need merge segments */ 1451 while (seg_res != 0) { 1452 uint16_t rcv_cnt = RTE_MIN((uint16_t)seg_res, 1453 VIRTIO_MBUF_BURST_SZ); 1454 1455 if (likely(virtqueue_nused(vq) >= rcv_cnt)) { 1456 num = virtqueue_dequeue_burst_rx(vq, rcv_pkts, len, 1457 rcv_cnt); 1458 uint16_t extra_idx = 0; 1459 1460 rcv_cnt = num; 1461 while (extra_idx < rcv_cnt) { 1462 rxm = rcv_pkts[extra_idx]; 1463 rxm->data_off = 1464 RTE_PKTMBUF_HEADROOM - hdr_size; 1465 rxm->pkt_len = (uint32_t)(len[extra_idx]); 1466 rxm->data_len = (uint16_t)(len[extra_idx]); 1467 prev->next = rxm; 1468 prev = rxm; 1469 rx_pkts[nb_rx]->pkt_len += len[extra_idx]; 1470 extra_idx += 1; 1471 }; 1472 seg_res -= rcv_cnt; 1473 1474 if (!seg_res) { 1475 virtio_rx_stats_updated(rxvq, rx_pkts[nb_rx]); 1476 nb_rx++; 1477 } 1478 } else { 1479 PMD_RX_LOG(ERR, 1480 "No enough segments for packet."); 1481 rte_pktmbuf_free(rx_pkts[nb_rx]); 1482 rxvq->stats.errors++; 1483 break; 1484 } 1485 } 1486 1487 rxvq->stats.packets += nb_rx; 1488 1489 /* Allocate new mbuf for the used descriptor */ 1490 if (likely(!virtqueue_full(vq))) { 1491 /* free_cnt may include mrg descs */ 1492 uint16_t free_cnt = vq->vq_free_cnt; 1493 struct rte_mbuf *new_pkts[free_cnt]; 1494 1495 if (!rte_pktmbuf_alloc_bulk(rxvq->mpool, new_pkts, free_cnt)) { 1496 error = virtqueue_enqueue_recv_refill(vq, new_pkts, 1497 free_cnt); 1498 if (unlikely(error)) { 1499 for (i = 0; i < free_cnt; i++) 1500 rte_pktmbuf_free(new_pkts[i]); 1501 } 1502 nb_enqueued += free_cnt; 1503 } else { 1504 struct rte_eth_dev *dev = 1505 &rte_eth_devices[rxvq->port_id]; 1506 dev->data->rx_mbuf_alloc_failed += free_cnt; 1507 } 1508 } 1509 1510 if (likely(nb_enqueued)) { 1511 vq_update_avail_idx(vq); 1512 1513 if (unlikely(virtqueue_kick_prepare(vq))) { 1514 virtqueue_notify(vq); 1515 PMD_RX_LOG(DEBUG, "Notified"); 1516 } 1517 } 1518 1519 return nb_rx; 1520 } 1521 1522 uint16_t 1523 virtio_recv_mergeable_pkts_packed(void *rx_queue, 1524 struct rte_mbuf **rx_pkts, 1525 uint16_t nb_pkts) 1526 { 1527 struct virtnet_rx *rxvq = rx_queue; 1528 struct virtqueue *vq = rxvq->vq; 1529 struct virtio_hw *hw = vq->hw; 1530 struct rte_mbuf *rxm; 1531 struct rte_mbuf *prev = NULL; 1532 uint16_t num, nb_rx = 0; 1533 uint32_t len[VIRTIO_MBUF_BURST_SZ]; 1534 struct rte_mbuf *rcv_pkts[VIRTIO_MBUF_BURST_SZ]; 1535 uint32_t nb_enqueued = 0; 1536 uint32_t seg_num = 0; 1537 uint32_t seg_res = 0; 1538 uint32_t hdr_size = hw->vtnet_hdr_size; 1539 int32_t i; 1540 int error; 1541 1542 if (unlikely(hw->started == 0)) 1543 return nb_rx; 1544 1545 1546 num = nb_pkts; 1547 if (unlikely(num > VIRTIO_MBUF_BURST_SZ)) 1548 num = VIRTIO_MBUF_BURST_SZ; 1549 if (likely(num > DESC_PER_CACHELINE)) 1550 num = num - ((vq->vq_used_cons_idx + num) % DESC_PER_CACHELINE); 1551 1552 num = virtqueue_dequeue_burst_rx_packed(vq, rcv_pkts, len, num); 1553 1554 for (i = 0; i < num; i++) { 1555 struct virtio_net_hdr_mrg_rxbuf *header; 1556 1557 PMD_RX_LOG(DEBUG, "dequeue:%d", num); 1558 PMD_RX_LOG(DEBUG, "packet len:%d", len[i]); 1559 1560 rxm = rcv_pkts[i]; 1561 1562 if (unlikely(len[i] < hdr_size + RTE_ETHER_HDR_LEN)) { 1563 PMD_RX_LOG(ERR, "Packet drop"); 1564 nb_enqueued++; 1565 virtio_discard_rxbuf(vq, rxm); 1566 rxvq->stats.errors++; 1567 continue; 1568 } 1569 1570 header = (struct virtio_net_hdr_mrg_rxbuf *)((char *) 1571 rxm->buf_addr + RTE_PKTMBUF_HEADROOM - hdr_size); 1572 seg_num = header->num_buffers; 1573 1574 if (seg_num == 0) 1575 seg_num = 1; 1576 1577 rxm->data_off = RTE_PKTMBUF_HEADROOM; 1578 rxm->nb_segs = seg_num; 1579 rxm->ol_flags = 0; 1580 rxm->vlan_tci = 0; 1581 rxm->pkt_len = (uint32_t)(len[i] - hdr_size); 1582 rxm->data_len = (uint16_t)(len[i] - hdr_size); 1583 1584 rxm->port = rxvq->port_id; 1585 rx_pkts[nb_rx] = rxm; 1586 prev = rxm; 1587 1588 if (hw->has_rx_offload && 1589 virtio_rx_offload(rxm, &header->hdr) < 0) { 1590 virtio_discard_rxbuf(vq, rxm); 1591 rxvq->stats.errors++; 1592 continue; 1593 } 1594 1595 if (hw->vlan_strip) 1596 rte_vlan_strip(rx_pkts[nb_rx]); 1597 1598 seg_res = seg_num - 1; 1599 1600 /* Merge remaining segments */ 1601 while (seg_res != 0 && i < (num - 1)) { 1602 i++; 1603 1604 rxm = rcv_pkts[i]; 1605 rxm->data_off = RTE_PKTMBUF_HEADROOM - hdr_size; 1606 rxm->pkt_len = (uint32_t)(len[i]); 1607 rxm->data_len = (uint16_t)(len[i]); 1608 1609 rx_pkts[nb_rx]->pkt_len += (uint32_t)(len[i]); 1610 1611 prev->next = rxm; 1612 prev = rxm; 1613 seg_res -= 1; 1614 } 1615 1616 if (!seg_res) { 1617 virtio_rx_stats_updated(rxvq, rx_pkts[nb_rx]); 1618 nb_rx++; 1619 } 1620 } 1621 1622 /* Last packet still need merge segments */ 1623 while (seg_res != 0) { 1624 uint16_t rcv_cnt = RTE_MIN((uint16_t)seg_res, 1625 VIRTIO_MBUF_BURST_SZ); 1626 uint16_t extra_idx = 0; 1627 1628 rcv_cnt = virtqueue_dequeue_burst_rx_packed(vq, rcv_pkts, 1629 len, rcv_cnt); 1630 if (unlikely(rcv_cnt == 0)) { 1631 PMD_RX_LOG(ERR, "No enough segments for packet."); 1632 rte_pktmbuf_free(rx_pkts[nb_rx]); 1633 rxvq->stats.errors++; 1634 break; 1635 } 1636 1637 while (extra_idx < rcv_cnt) { 1638 rxm = rcv_pkts[extra_idx]; 1639 1640 rxm->data_off = RTE_PKTMBUF_HEADROOM - hdr_size; 1641 rxm->pkt_len = (uint32_t)(len[extra_idx]); 1642 rxm->data_len = (uint16_t)(len[extra_idx]); 1643 1644 prev->next = rxm; 1645 prev = rxm; 1646 rx_pkts[nb_rx]->pkt_len += len[extra_idx]; 1647 extra_idx += 1; 1648 } 1649 seg_res -= rcv_cnt; 1650 if (!seg_res) { 1651 virtio_rx_stats_updated(rxvq, rx_pkts[nb_rx]); 1652 nb_rx++; 1653 } 1654 } 1655 1656 rxvq->stats.packets += nb_rx; 1657 1658 /* Allocate new mbuf for the used descriptor */ 1659 if (likely(!virtqueue_full(vq))) { 1660 /* free_cnt may include mrg descs */ 1661 uint16_t free_cnt = vq->vq_free_cnt; 1662 struct rte_mbuf *new_pkts[free_cnt]; 1663 1664 if (!rte_pktmbuf_alloc_bulk(rxvq->mpool, new_pkts, free_cnt)) { 1665 error = virtqueue_enqueue_recv_refill_packed(vq, 1666 new_pkts, free_cnt); 1667 if (unlikely(error)) { 1668 for (i = 0; i < free_cnt; i++) 1669 rte_pktmbuf_free(new_pkts[i]); 1670 } 1671 nb_enqueued += free_cnt; 1672 } else { 1673 struct rte_eth_dev *dev = 1674 &rte_eth_devices[rxvq->port_id]; 1675 dev->data->rx_mbuf_alloc_failed += free_cnt; 1676 } 1677 } 1678 1679 if (likely(nb_enqueued)) { 1680 if (unlikely(virtqueue_kick_prepare_packed(vq))) { 1681 virtqueue_notify(vq); 1682 PMD_RX_LOG(DEBUG, "Notified"); 1683 } 1684 } 1685 1686 return nb_rx; 1687 } 1688 1689 uint16_t 1690 virtio_xmit_pkts_prepare(void *tx_queue __rte_unused, struct rte_mbuf **tx_pkts, 1691 uint16_t nb_pkts) 1692 { 1693 uint16_t nb_tx; 1694 int error; 1695 1696 for (nb_tx = 0; nb_tx < nb_pkts; nb_tx++) { 1697 struct rte_mbuf *m = tx_pkts[nb_tx]; 1698 1699 #ifdef RTE_LIBRTE_ETHDEV_DEBUG 1700 error = rte_validate_tx_offload(m); 1701 if (unlikely(error)) { 1702 rte_errno = -error; 1703 break; 1704 } 1705 #endif 1706 1707 /* Do VLAN tag insertion */ 1708 if (unlikely(m->ol_flags & PKT_TX_VLAN_PKT)) { 1709 error = rte_vlan_insert(&m); 1710 /* rte_vlan_insert() may change pointer 1711 * even in the case of failure 1712 */ 1713 tx_pkts[nb_tx] = m; 1714 1715 if (unlikely(error)) { 1716 rte_errno = -error; 1717 break; 1718 } 1719 } 1720 1721 error = rte_net_intel_cksum_prepare(m); 1722 if (unlikely(error)) { 1723 rte_errno = -error; 1724 break; 1725 } 1726 1727 if (m->ol_flags & PKT_TX_TCP_SEG) 1728 virtio_tso_fix_cksum(m); 1729 } 1730 1731 return nb_tx; 1732 } 1733 1734 uint16_t 1735 virtio_xmit_pkts_packed(void *tx_queue, struct rte_mbuf **tx_pkts, 1736 uint16_t nb_pkts) 1737 { 1738 struct virtnet_tx *txvq = tx_queue; 1739 struct virtqueue *vq = txvq->vq; 1740 struct virtio_hw *hw = vq->hw; 1741 uint16_t hdr_size = hw->vtnet_hdr_size; 1742 uint16_t nb_tx = 0; 1743 bool in_order = vtpci_with_feature(hw, VIRTIO_F_IN_ORDER); 1744 1745 if (unlikely(hw->started == 0 && tx_pkts != hw->inject_pkts)) 1746 return nb_tx; 1747 1748 if (unlikely(nb_pkts < 1)) 1749 return nb_pkts; 1750 1751 PMD_TX_LOG(DEBUG, "%d packets to xmit", nb_pkts); 1752 1753 if (nb_pkts > vq->vq_free_cnt) 1754 virtio_xmit_cleanup_packed(vq, nb_pkts - vq->vq_free_cnt, 1755 in_order); 1756 1757 for (nb_tx = 0; nb_tx < nb_pkts; nb_tx++) { 1758 struct rte_mbuf *txm = tx_pkts[nb_tx]; 1759 int can_push = 0, use_indirect = 0, slots, need; 1760 1761 /* optimize ring usage */ 1762 if ((vtpci_with_feature(hw, VIRTIO_F_ANY_LAYOUT) || 1763 vtpci_with_feature(hw, VIRTIO_F_VERSION_1)) && 1764 rte_mbuf_refcnt_read(txm) == 1 && 1765 RTE_MBUF_DIRECT(txm) && 1766 txm->nb_segs == 1 && 1767 rte_pktmbuf_headroom(txm) >= hdr_size && 1768 rte_is_aligned(rte_pktmbuf_mtod(txm, char *), 1769 __alignof__(struct virtio_net_hdr_mrg_rxbuf))) 1770 can_push = 1; 1771 else if (vtpci_with_feature(hw, VIRTIO_RING_F_INDIRECT_DESC) && 1772 txm->nb_segs < VIRTIO_MAX_TX_INDIRECT) 1773 use_indirect = 1; 1774 /* How many main ring entries are needed to this Tx? 1775 * indirect => 1 1776 * any_layout => number of segments 1777 * default => number of segments + 1 1778 */ 1779 slots = use_indirect ? 1 : (txm->nb_segs + !can_push); 1780 need = slots - vq->vq_free_cnt; 1781 1782 /* Positive value indicates it need free vring descriptors */ 1783 if (unlikely(need > 0)) { 1784 virtio_xmit_cleanup_packed(vq, need, in_order); 1785 need = slots - vq->vq_free_cnt; 1786 if (unlikely(need > 0)) { 1787 PMD_TX_LOG(ERR, 1788 "No free tx descriptors to transmit"); 1789 break; 1790 } 1791 } 1792 1793 /* Enqueue Packet buffers */ 1794 if (can_push) 1795 virtqueue_enqueue_xmit_packed_fast(txvq, txm, in_order); 1796 else 1797 virtqueue_enqueue_xmit_packed(txvq, txm, slots, 1798 use_indirect, 0, 1799 in_order); 1800 1801 virtio_update_packet_stats(&txvq->stats, txm); 1802 } 1803 1804 txvq->stats.packets += nb_tx; 1805 1806 if (likely(nb_tx)) { 1807 if (unlikely(virtqueue_kick_prepare_packed(vq))) { 1808 virtqueue_notify(vq); 1809 PMD_TX_LOG(DEBUG, "Notified backend after xmit"); 1810 } 1811 } 1812 1813 return nb_tx; 1814 } 1815 1816 uint16_t 1817 virtio_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts, uint16_t nb_pkts) 1818 { 1819 struct virtnet_tx *txvq = tx_queue; 1820 struct virtqueue *vq = txvq->vq; 1821 struct virtio_hw *hw = vq->hw; 1822 uint16_t hdr_size = hw->vtnet_hdr_size; 1823 uint16_t nb_used, nb_tx = 0; 1824 1825 if (unlikely(hw->started == 0 && tx_pkts != hw->inject_pkts)) 1826 return nb_tx; 1827 1828 if (unlikely(nb_pkts < 1)) 1829 return nb_pkts; 1830 1831 PMD_TX_LOG(DEBUG, "%d packets to xmit", nb_pkts); 1832 1833 nb_used = virtqueue_nused(vq); 1834 1835 if (likely(nb_used > vq->vq_nentries - vq->vq_free_thresh)) 1836 virtio_xmit_cleanup(vq, nb_used); 1837 1838 for (nb_tx = 0; nb_tx < nb_pkts; nb_tx++) { 1839 struct rte_mbuf *txm = tx_pkts[nb_tx]; 1840 int can_push = 0, use_indirect = 0, slots, need; 1841 1842 /* optimize ring usage */ 1843 if ((vtpci_with_feature(hw, VIRTIO_F_ANY_LAYOUT) || 1844 vtpci_with_feature(hw, VIRTIO_F_VERSION_1)) && 1845 rte_mbuf_refcnt_read(txm) == 1 && 1846 RTE_MBUF_DIRECT(txm) && 1847 txm->nb_segs == 1 && 1848 rte_pktmbuf_headroom(txm) >= hdr_size && 1849 rte_is_aligned(rte_pktmbuf_mtod(txm, char *), 1850 __alignof__(struct virtio_net_hdr_mrg_rxbuf))) 1851 can_push = 1; 1852 else if (vtpci_with_feature(hw, VIRTIO_RING_F_INDIRECT_DESC) && 1853 txm->nb_segs < VIRTIO_MAX_TX_INDIRECT) 1854 use_indirect = 1; 1855 1856 /* How many main ring entries are needed to this Tx? 1857 * any_layout => number of segments 1858 * indirect => 1 1859 * default => number of segments + 1 1860 */ 1861 slots = use_indirect ? 1 : (txm->nb_segs + !can_push); 1862 need = slots - vq->vq_free_cnt; 1863 1864 /* Positive value indicates it need free vring descriptors */ 1865 if (unlikely(need > 0)) { 1866 nb_used = virtqueue_nused(vq); 1867 1868 need = RTE_MIN(need, (int)nb_used); 1869 1870 virtio_xmit_cleanup(vq, need); 1871 need = slots - vq->vq_free_cnt; 1872 if (unlikely(need > 0)) { 1873 PMD_TX_LOG(ERR, 1874 "No free tx descriptors to transmit"); 1875 break; 1876 } 1877 } 1878 1879 /* Enqueue Packet buffers */ 1880 virtqueue_enqueue_xmit(txvq, txm, slots, use_indirect, 1881 can_push, 0); 1882 1883 virtio_update_packet_stats(&txvq->stats, txm); 1884 } 1885 1886 txvq->stats.packets += nb_tx; 1887 1888 if (likely(nb_tx)) { 1889 vq_update_avail_idx(vq); 1890 1891 if (unlikely(virtqueue_kick_prepare(vq))) { 1892 virtqueue_notify(vq); 1893 PMD_TX_LOG(DEBUG, "Notified backend after xmit"); 1894 } 1895 } 1896 1897 return nb_tx; 1898 } 1899 1900 static __rte_always_inline int 1901 virtio_xmit_try_cleanup_inorder(struct virtqueue *vq, uint16_t need) 1902 { 1903 uint16_t nb_used, nb_clean, nb_descs; 1904 1905 nb_descs = vq->vq_free_cnt + need; 1906 nb_used = virtqueue_nused(vq); 1907 nb_clean = RTE_MIN(need, (int)nb_used); 1908 1909 virtio_xmit_cleanup_inorder(vq, nb_clean); 1910 1911 return nb_descs - vq->vq_free_cnt; 1912 } 1913 1914 uint16_t 1915 virtio_xmit_pkts_inorder(void *tx_queue, 1916 struct rte_mbuf **tx_pkts, 1917 uint16_t nb_pkts) 1918 { 1919 struct virtnet_tx *txvq = tx_queue; 1920 struct virtqueue *vq = txvq->vq; 1921 struct virtio_hw *hw = vq->hw; 1922 uint16_t hdr_size = hw->vtnet_hdr_size; 1923 uint16_t nb_used, nb_tx = 0, nb_inorder_pkts = 0; 1924 struct rte_mbuf *inorder_pkts[nb_pkts]; 1925 int need; 1926 1927 if (unlikely(hw->started == 0 && tx_pkts != hw->inject_pkts)) 1928 return nb_tx; 1929 1930 if (unlikely(nb_pkts < 1)) 1931 return nb_pkts; 1932 1933 VIRTQUEUE_DUMP(vq); 1934 PMD_TX_LOG(DEBUG, "%d packets to xmit", nb_pkts); 1935 nb_used = virtqueue_nused(vq); 1936 1937 if (likely(nb_used > vq->vq_nentries - vq->vq_free_thresh)) 1938 virtio_xmit_cleanup_inorder(vq, nb_used); 1939 1940 for (nb_tx = 0; nb_tx < nb_pkts; nb_tx++) { 1941 struct rte_mbuf *txm = tx_pkts[nb_tx]; 1942 int slots; 1943 1944 /* optimize ring usage */ 1945 if ((vtpci_with_feature(hw, VIRTIO_F_ANY_LAYOUT) || 1946 vtpci_with_feature(hw, VIRTIO_F_VERSION_1)) && 1947 rte_mbuf_refcnt_read(txm) == 1 && 1948 RTE_MBUF_DIRECT(txm) && 1949 txm->nb_segs == 1 && 1950 rte_pktmbuf_headroom(txm) >= hdr_size && 1951 rte_is_aligned(rte_pktmbuf_mtod(txm, char *), 1952 __alignof__(struct virtio_net_hdr_mrg_rxbuf))) { 1953 inorder_pkts[nb_inorder_pkts] = txm; 1954 nb_inorder_pkts++; 1955 1956 continue; 1957 } 1958 1959 if (nb_inorder_pkts) { 1960 need = nb_inorder_pkts - vq->vq_free_cnt; 1961 if (unlikely(need > 0)) { 1962 need = virtio_xmit_try_cleanup_inorder(vq, 1963 need); 1964 if (unlikely(need > 0)) { 1965 PMD_TX_LOG(ERR, 1966 "No free tx descriptors to " 1967 "transmit"); 1968 break; 1969 } 1970 } 1971 virtqueue_enqueue_xmit_inorder(txvq, inorder_pkts, 1972 nb_inorder_pkts); 1973 nb_inorder_pkts = 0; 1974 } 1975 1976 slots = txm->nb_segs + 1; 1977 need = slots - vq->vq_free_cnt; 1978 if (unlikely(need > 0)) { 1979 need = virtio_xmit_try_cleanup_inorder(vq, slots); 1980 1981 if (unlikely(need > 0)) { 1982 PMD_TX_LOG(ERR, 1983 "No free tx descriptors to transmit"); 1984 break; 1985 } 1986 } 1987 /* Enqueue Packet buffers */ 1988 virtqueue_enqueue_xmit(txvq, txm, slots, 0, 0, 1); 1989 1990 virtio_update_packet_stats(&txvq->stats, txm); 1991 } 1992 1993 /* Transmit all inorder packets */ 1994 if (nb_inorder_pkts) { 1995 need = nb_inorder_pkts - vq->vq_free_cnt; 1996 if (unlikely(need > 0)) { 1997 need = virtio_xmit_try_cleanup_inorder(vq, 1998 need); 1999 if (unlikely(need > 0)) { 2000 PMD_TX_LOG(ERR, 2001 "No free tx descriptors to transmit"); 2002 nb_inorder_pkts = vq->vq_free_cnt; 2003 nb_tx -= need; 2004 } 2005 } 2006 2007 virtqueue_enqueue_xmit_inorder(txvq, inorder_pkts, 2008 nb_inorder_pkts); 2009 } 2010 2011 txvq->stats.packets += nb_tx; 2012 2013 if (likely(nb_tx)) { 2014 vq_update_avail_idx(vq); 2015 2016 if (unlikely(virtqueue_kick_prepare(vq))) { 2017 virtqueue_notify(vq); 2018 PMD_TX_LOG(DEBUG, "Notified backend after xmit"); 2019 } 2020 } 2021 2022 VIRTQUEUE_DUMP(vq); 2023 2024 return nb_tx; 2025 } 2026 2027 #ifndef CC_AVX512_SUPPORT 2028 uint16_t 2029 virtio_recv_pkts_packed_vec(void *rx_queue __rte_unused, 2030 struct rte_mbuf **rx_pkts __rte_unused, 2031 uint16_t nb_pkts __rte_unused) 2032 { 2033 return 0; 2034 } 2035 2036 uint16_t 2037 virtio_xmit_pkts_packed_vec(void *tx_queue __rte_unused, 2038 struct rte_mbuf **tx_pkts __rte_unused, 2039 uint16_t nb_pkts __rte_unused) 2040 { 2041 return 0; 2042 } 2043 #endif /* ifndef CC_AVX512_SUPPORT */ 2044