1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright(c) 2010-2014 Intel Corporation
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>
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>
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"
36 #ifdef RTE_LIBRTE_VIRTIO_DEBUG_DUMP
37 #define VIRTIO_DUMP_PACKET(m, len) rte_pktmbuf_dump(stdout, m, len)
39 #define VIRTIO_DUMP_PACKET(m, len) do { } while (0)
43 virtio_dev_rx_queue_done(void *rxq, uint16_t offset)
45 struct virtnet_rx *rxvq = rxq;
46 struct virtqueue *vq = rxvq->vq;
48 return VIRTQUEUE_NUSED(vq) >= offset;
52 vq_ring_free_inorder(struct virtqueue *vq, uint16_t desc_idx, uint16_t num)
54 vq->vq_free_cnt += num;
55 vq->vq_desc_tail_idx = desc_idx & (vq->vq_nentries - 1);
59 vq_ring_free_chain(struct virtqueue *vq, uint16_t desc_idx)
61 struct vring_desc *dp, *dp_tail;
62 struct vq_desc_extra *dxp;
63 uint16_t desc_idx_last = desc_idx;
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];
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).
81 if (vq->vq_desc_tail_idx == VQ_RING_DESC_CHAIN_END) {
82 vq->vq_desc_head_idx = desc_idx;
84 dp_tail = &vq->vq_split.ring.desc[vq->vq_desc_tail_idx];
85 dp_tail->next = desc_idx;
88 vq->vq_desc_tail_idx = desc_idx_last;
89 dp->next = VQ_RING_DESC_CHAIN_END;
93 vq_ring_free_id_packed(struct virtqueue *vq, uint16_t id)
95 struct vq_desc_extra *dxp;
97 dxp = &vq->vq_descx[id];
98 vq->vq_free_cnt += dxp->ndescs;
100 if (vq->vq_desc_tail_idx == VQ_RING_DESC_CHAIN_END)
101 vq->vq_desc_head_idx = id;
103 vq->vq_descx[vq->vq_desc_tail_idx].next = id;
105 vq->vq_desc_tail_idx = id;
106 dxp->next = VQ_RING_DESC_CHAIN_END;
110 virtio_update_packet_stats(struct virtnet_stats *stats, struct rte_mbuf *mbuf)
112 uint32_t s = mbuf->pkt_len;
113 struct rte_ether_addr *ea;
118 stats->size_bins[1]++;
119 } else if (s > 64 && s < 1024) {
122 /* count zeros, and offset into correct bin */
123 bin = (sizeof(s) * 8) - __builtin_clz(s) - 5;
124 stats->size_bins[bin]++;
127 stats->size_bins[0]++;
129 stats->size_bins[6]++;
131 stats->size_bins[7]++;
134 ea = rte_pktmbuf_mtod(mbuf, struct rte_ether_addr *);
135 if (rte_is_multicast_ether_addr(ea)) {
136 if (rte_is_broadcast_ether_addr(ea))
144 virtio_rx_stats_updated(struct virtnet_rx *rxvq, struct rte_mbuf *m)
146 VIRTIO_DUMP_PACKET(m, m->data_len);
148 virtio_update_packet_stats(&rxvq->stats, m);
152 virtqueue_dequeue_burst_rx_packed(struct virtqueue *vq,
153 struct rte_mbuf **rx_pkts,
157 struct rte_mbuf *cookie;
160 struct vring_packed_desc *desc;
163 desc = vq->vq_packed.ring.desc;
165 for (i = 0; i < num; i++) {
166 used_idx = vq->vq_used_cons_idx;
167 /* desc_is_used has a load-acquire or rte_cio_rmb inside
168 * and wait for used desc in virtqueue.
170 if (!desc_is_used(&desc[used_idx], vq))
172 len[i] = desc[used_idx].len;
173 id = desc[used_idx].id;
174 cookie = (struct rte_mbuf *)vq->vq_descx[id].cookie;
175 if (unlikely(cookie == NULL)) {
176 PMD_DRV_LOG(ERR, "vring descriptor with no mbuf cookie at %u",
177 vq->vq_used_cons_idx);
180 rte_prefetch0(cookie);
181 rte_packet_prefetch(rte_pktmbuf_mtod(cookie, void *));
185 vq->vq_used_cons_idx++;
186 if (vq->vq_used_cons_idx >= vq->vq_nentries) {
187 vq->vq_used_cons_idx -= vq->vq_nentries;
188 vq->vq_packed.used_wrap_counter ^= 1;
196 virtqueue_dequeue_burst_rx(struct virtqueue *vq, struct rte_mbuf **rx_pkts,
197 uint32_t *len, uint16_t num)
199 struct vring_used_elem *uep;
200 struct rte_mbuf *cookie;
201 uint16_t used_idx, desc_idx;
204 /* Caller does the check */
205 for (i = 0; i < num ; i++) {
206 used_idx = (uint16_t)(vq->vq_used_cons_idx & (vq->vq_nentries - 1));
207 uep = &vq->vq_split.ring.used->ring[used_idx];
208 desc_idx = (uint16_t) uep->id;
210 cookie = (struct rte_mbuf *)vq->vq_descx[desc_idx].cookie;
212 if (unlikely(cookie == NULL)) {
213 PMD_DRV_LOG(ERR, "vring descriptor with no mbuf cookie at %u",
214 vq->vq_used_cons_idx);
218 rte_prefetch0(cookie);
219 rte_packet_prefetch(rte_pktmbuf_mtod(cookie, void *));
221 vq->vq_used_cons_idx++;
222 vq_ring_free_chain(vq, desc_idx);
223 vq->vq_descx[desc_idx].cookie = NULL;
230 virtqueue_dequeue_rx_inorder(struct virtqueue *vq,
231 struct rte_mbuf **rx_pkts,
235 struct vring_used_elem *uep;
236 struct rte_mbuf *cookie;
237 uint16_t used_idx = 0;
240 if (unlikely(num == 0))
243 for (i = 0; i < num; i++) {
244 used_idx = vq->vq_used_cons_idx & (vq->vq_nentries - 1);
245 /* Desc idx same as used idx */
246 uep = &vq->vq_split.ring.used->ring[used_idx];
248 cookie = (struct rte_mbuf *)vq->vq_descx[used_idx].cookie;
250 if (unlikely(cookie == NULL)) {
251 PMD_DRV_LOG(ERR, "vring descriptor with no mbuf cookie at %u",
252 vq->vq_used_cons_idx);
256 rte_prefetch0(cookie);
257 rte_packet_prefetch(rte_pktmbuf_mtod(cookie, void *));
259 vq->vq_used_cons_idx++;
260 vq->vq_descx[used_idx].cookie = NULL;
263 vq_ring_free_inorder(vq, used_idx, i);
267 #ifndef DEFAULT_TX_FREE_THRESH
268 #define DEFAULT_TX_FREE_THRESH 32
272 virtio_xmit_cleanup_inorder_packed(struct virtqueue *vq, int num)
274 uint16_t used_idx, id, curr_id, free_cnt = 0;
275 uint16_t size = vq->vq_nentries;
276 struct vring_packed_desc *desc = vq->vq_packed.ring.desc;
277 struct vq_desc_extra *dxp;
279 used_idx = vq->vq_used_cons_idx;
280 /* desc_is_used has a load-acquire or rte_cio_rmb inside
281 * and wait for used desc in virtqueue.
283 while (num > 0 && desc_is_used(&desc[used_idx], vq)) {
284 id = desc[used_idx].id;
287 dxp = &vq->vq_descx[used_idx];
288 used_idx += dxp->ndescs;
289 free_cnt += dxp->ndescs;
291 if (used_idx >= size) {
293 vq->vq_packed.used_wrap_counter ^= 1;
295 if (dxp->cookie != NULL) {
296 rte_pktmbuf_free(dxp->cookie);
299 } while (curr_id != id);
301 vq->vq_used_cons_idx = used_idx;
302 vq->vq_free_cnt += free_cnt;
306 virtio_xmit_cleanup_normal_packed(struct virtqueue *vq, int num)
308 uint16_t used_idx, id;
309 uint16_t size = vq->vq_nentries;
310 struct vring_packed_desc *desc = vq->vq_packed.ring.desc;
311 struct vq_desc_extra *dxp;
313 used_idx = vq->vq_used_cons_idx;
314 /* desc_is_used has a load-acquire or rte_cio_rmb inside
315 * and wait for used desc in virtqueue.
317 while (num-- && desc_is_used(&desc[used_idx], vq)) {
318 id = desc[used_idx].id;
319 dxp = &vq->vq_descx[id];
320 vq->vq_used_cons_idx += dxp->ndescs;
321 if (vq->vq_used_cons_idx >= size) {
322 vq->vq_used_cons_idx -= size;
323 vq->vq_packed.used_wrap_counter ^= 1;
325 vq_ring_free_id_packed(vq, id);
326 if (dxp->cookie != NULL) {
327 rte_pktmbuf_free(dxp->cookie);
330 used_idx = vq->vq_used_cons_idx;
334 /* Cleanup from completed transmits. */
336 virtio_xmit_cleanup_packed(struct virtqueue *vq, int num, int in_order)
339 virtio_xmit_cleanup_inorder_packed(vq, num);
341 virtio_xmit_cleanup_normal_packed(vq, num);
345 virtio_xmit_cleanup(struct virtqueue *vq, uint16_t num)
347 uint16_t i, used_idx, desc_idx;
348 for (i = 0; i < num; i++) {
349 struct vring_used_elem *uep;
350 struct vq_desc_extra *dxp;
352 used_idx = (uint16_t)(vq->vq_used_cons_idx & (vq->vq_nentries - 1));
353 uep = &vq->vq_split.ring.used->ring[used_idx];
355 desc_idx = (uint16_t) uep->id;
356 dxp = &vq->vq_descx[desc_idx];
357 vq->vq_used_cons_idx++;
358 vq_ring_free_chain(vq, desc_idx);
360 if (dxp->cookie != NULL) {
361 rte_pktmbuf_free(dxp->cookie);
367 /* Cleanup from completed inorder transmits. */
368 static __rte_always_inline void
369 virtio_xmit_cleanup_inorder(struct virtqueue *vq, uint16_t num)
371 uint16_t i, idx = vq->vq_used_cons_idx;
372 int16_t free_cnt = 0;
373 struct vq_desc_extra *dxp = NULL;
375 if (unlikely(num == 0))
378 for (i = 0; i < num; i++) {
379 dxp = &vq->vq_descx[idx++ & (vq->vq_nentries - 1)];
380 free_cnt += dxp->ndescs;
381 if (dxp->cookie != NULL) {
382 rte_pktmbuf_free(dxp->cookie);
387 vq->vq_free_cnt += free_cnt;
388 vq->vq_used_cons_idx = idx;
392 virtqueue_enqueue_refill_inorder(struct virtqueue *vq,
393 struct rte_mbuf **cookies,
396 struct vq_desc_extra *dxp;
397 struct virtio_hw *hw = vq->hw;
398 struct vring_desc *start_dp;
399 uint16_t head_idx, idx, i = 0;
401 if (unlikely(vq->vq_free_cnt == 0))
403 if (unlikely(vq->vq_free_cnt < num))
406 head_idx = vq->vq_desc_head_idx & (vq->vq_nentries - 1);
407 start_dp = vq->vq_split.ring.desc;
410 idx = head_idx & (vq->vq_nentries - 1);
411 dxp = &vq->vq_descx[idx];
412 dxp->cookie = (void *)cookies[i];
416 VIRTIO_MBUF_ADDR(cookies[i], vq) +
417 RTE_PKTMBUF_HEADROOM - hw->vtnet_hdr_size;
419 cookies[i]->buf_len -
420 RTE_PKTMBUF_HEADROOM +
422 start_dp[idx].flags = VRING_DESC_F_WRITE;
424 vq_update_avail_ring(vq, idx);
429 vq->vq_desc_head_idx += num;
430 vq->vq_free_cnt = (uint16_t)(vq->vq_free_cnt - num);
435 virtqueue_enqueue_recv_refill(struct virtqueue *vq, struct rte_mbuf **cookie,
438 struct vq_desc_extra *dxp;
439 struct virtio_hw *hw = vq->hw;
440 struct vring_desc *start_dp = vq->vq_split.ring.desc;
443 if (unlikely(vq->vq_free_cnt == 0))
445 if (unlikely(vq->vq_free_cnt < num))
448 if (unlikely(vq->vq_desc_head_idx >= vq->vq_nentries))
451 for (i = 0; i < num; i++) {
452 idx = vq->vq_desc_head_idx;
453 dxp = &vq->vq_descx[idx];
454 dxp->cookie = (void *)cookie[i];
458 VIRTIO_MBUF_ADDR(cookie[i], vq) +
459 RTE_PKTMBUF_HEADROOM - hw->vtnet_hdr_size;
461 cookie[i]->buf_len - RTE_PKTMBUF_HEADROOM +
463 start_dp[idx].flags = VRING_DESC_F_WRITE;
464 vq->vq_desc_head_idx = start_dp[idx].next;
465 vq_update_avail_ring(vq, idx);
466 if (vq->vq_desc_head_idx == VQ_RING_DESC_CHAIN_END) {
467 vq->vq_desc_tail_idx = vq->vq_desc_head_idx;
472 vq->vq_free_cnt = (uint16_t)(vq->vq_free_cnt - num);
478 virtqueue_enqueue_recv_refill_packed(struct virtqueue *vq,
479 struct rte_mbuf **cookie, uint16_t num)
481 struct vring_packed_desc *start_dp = vq->vq_packed.ring.desc;
482 uint16_t flags = vq->vq_packed.cached_flags;
483 struct virtio_hw *hw = vq->hw;
484 struct vq_desc_extra *dxp;
488 if (unlikely(vq->vq_free_cnt == 0))
490 if (unlikely(vq->vq_free_cnt < num))
493 for (i = 0; i < num; i++) {
494 idx = vq->vq_avail_idx;
495 dxp = &vq->vq_descx[idx];
496 dxp->cookie = (void *)cookie[i];
499 start_dp[idx].addr = VIRTIO_MBUF_ADDR(cookie[i], vq) +
500 RTE_PKTMBUF_HEADROOM - hw->vtnet_hdr_size;
501 start_dp[idx].len = cookie[i]->buf_len - RTE_PKTMBUF_HEADROOM
502 + hw->vtnet_hdr_size;
504 vq->vq_desc_head_idx = dxp->next;
505 if (vq->vq_desc_head_idx == VQ_RING_DESC_CHAIN_END)
506 vq->vq_desc_tail_idx = vq->vq_desc_head_idx;
508 virtqueue_store_flags_packed(&start_dp[idx], flags,
511 if (++vq->vq_avail_idx >= vq->vq_nentries) {
512 vq->vq_avail_idx -= vq->vq_nentries;
513 vq->vq_packed.cached_flags ^=
514 VRING_PACKED_DESC_F_AVAIL_USED;
515 flags = vq->vq_packed.cached_flags;
518 vq->vq_free_cnt = (uint16_t)(vq->vq_free_cnt - num);
522 /* When doing TSO, the IP length is not included in the pseudo header
523 * checksum of the packet given to the PMD, but for virtio it is
527 virtio_tso_fix_cksum(struct rte_mbuf *m)
529 /* common case: header is not fragmented */
530 if (likely(rte_pktmbuf_data_len(m) >= m->l2_len + m->l3_len +
532 struct rte_ipv4_hdr *iph;
533 struct rte_ipv6_hdr *ip6h;
534 struct rte_tcp_hdr *th;
535 uint16_t prev_cksum, new_cksum, ip_len, ip_paylen;
538 iph = rte_pktmbuf_mtod_offset(m,
539 struct rte_ipv4_hdr *, m->l2_len);
540 th = RTE_PTR_ADD(iph, m->l3_len);
541 if ((iph->version_ihl >> 4) == 4) {
542 iph->hdr_checksum = 0;
543 iph->hdr_checksum = rte_ipv4_cksum(iph);
544 ip_len = iph->total_length;
545 ip_paylen = rte_cpu_to_be_16(rte_be_to_cpu_16(ip_len) -
548 ip6h = (struct rte_ipv6_hdr *)iph;
549 ip_paylen = ip6h->payload_len;
552 /* calculate the new phdr checksum not including ip_paylen */
553 prev_cksum = th->cksum;
556 tmp = (tmp & 0xffff) + (tmp >> 16);
559 /* replace it in the packet */
560 th->cksum = new_cksum;
565 /* avoid write operation when necessary, to lessen cache issues */
566 #define ASSIGN_UNLESS_EQUAL(var, val) do { \
567 if ((var) != (val)) \
571 #define virtqueue_clear_net_hdr(_hdr) do { \
572 ASSIGN_UNLESS_EQUAL((_hdr)->csum_start, 0); \
573 ASSIGN_UNLESS_EQUAL((_hdr)->csum_offset, 0); \
574 ASSIGN_UNLESS_EQUAL((_hdr)->flags, 0); \
575 ASSIGN_UNLESS_EQUAL((_hdr)->gso_type, 0); \
576 ASSIGN_UNLESS_EQUAL((_hdr)->gso_size, 0); \
577 ASSIGN_UNLESS_EQUAL((_hdr)->hdr_len, 0); \
581 virtqueue_xmit_offload(struct virtio_net_hdr *hdr,
582 struct rte_mbuf *cookie,
586 if (cookie->ol_flags & PKT_TX_TCP_SEG)
587 cookie->ol_flags |= PKT_TX_TCP_CKSUM;
589 switch (cookie->ol_flags & PKT_TX_L4_MASK) {
590 case PKT_TX_UDP_CKSUM:
591 hdr->csum_start = cookie->l2_len + cookie->l3_len;
592 hdr->csum_offset = offsetof(struct rte_udp_hdr,
594 hdr->flags = VIRTIO_NET_HDR_F_NEEDS_CSUM;
597 case PKT_TX_TCP_CKSUM:
598 hdr->csum_start = cookie->l2_len + cookie->l3_len;
599 hdr->csum_offset = offsetof(struct rte_tcp_hdr, cksum);
600 hdr->flags = VIRTIO_NET_HDR_F_NEEDS_CSUM;
604 ASSIGN_UNLESS_EQUAL(hdr->csum_start, 0);
605 ASSIGN_UNLESS_EQUAL(hdr->csum_offset, 0);
606 ASSIGN_UNLESS_EQUAL(hdr->flags, 0);
610 /* TCP Segmentation Offload */
611 if (cookie->ol_flags & PKT_TX_TCP_SEG) {
612 hdr->gso_type = (cookie->ol_flags & PKT_TX_IPV6) ?
613 VIRTIO_NET_HDR_GSO_TCPV6 :
614 VIRTIO_NET_HDR_GSO_TCPV4;
615 hdr->gso_size = cookie->tso_segsz;
621 ASSIGN_UNLESS_EQUAL(hdr->gso_type, 0);
622 ASSIGN_UNLESS_EQUAL(hdr->gso_size, 0);
623 ASSIGN_UNLESS_EQUAL(hdr->hdr_len, 0);
629 virtqueue_enqueue_xmit_inorder(struct virtnet_tx *txvq,
630 struct rte_mbuf **cookies,
633 struct vq_desc_extra *dxp;
634 struct virtqueue *vq = txvq->vq;
635 struct vring_desc *start_dp;
636 struct virtio_net_hdr *hdr;
638 uint16_t head_size = vq->hw->vtnet_hdr_size;
641 idx = vq->vq_desc_head_idx;
642 start_dp = vq->vq_split.ring.desc;
645 idx = idx & (vq->vq_nentries - 1);
646 dxp = &vq->vq_descx[vq->vq_avail_idx & (vq->vq_nentries - 1)];
647 dxp->cookie = (void *)cookies[i];
649 virtio_update_packet_stats(&txvq->stats, cookies[i]);
651 hdr = (struct virtio_net_hdr *)(char *)cookies[i]->buf_addr +
652 cookies[i]->data_off - head_size;
654 /* if offload disabled, hdr is not zeroed yet, do it now */
655 if (!vq->hw->has_tx_offload)
656 virtqueue_clear_net_hdr(hdr);
658 virtqueue_xmit_offload(hdr, cookies[i], true);
661 VIRTIO_MBUF_DATA_DMA_ADDR(cookies[i], vq) - head_size;
662 start_dp[idx].len = cookies[i]->data_len + head_size;
663 start_dp[idx].flags = 0;
666 vq_update_avail_ring(vq, idx);
672 vq->vq_free_cnt = (uint16_t)(vq->vq_free_cnt - num);
673 vq->vq_desc_head_idx = idx & (vq->vq_nentries - 1);
677 virtqueue_enqueue_xmit_packed_fast(struct virtnet_tx *txvq,
678 struct rte_mbuf *cookie,
681 struct virtqueue *vq = txvq->vq;
682 struct vring_packed_desc *dp;
683 struct vq_desc_extra *dxp;
684 uint16_t idx, id, flags;
685 uint16_t head_size = vq->hw->vtnet_hdr_size;
686 struct virtio_net_hdr *hdr;
688 id = in_order ? vq->vq_avail_idx : vq->vq_desc_head_idx;
689 idx = vq->vq_avail_idx;
690 dp = &vq->vq_packed.ring.desc[idx];
692 dxp = &vq->vq_descx[id];
694 dxp->cookie = cookie;
696 flags = vq->vq_packed.cached_flags;
698 /* prepend cannot fail, checked by caller */
699 hdr = (struct virtio_net_hdr *)(char *)cookie->buf_addr +
700 cookie->data_off - head_size;
702 /* if offload disabled, hdr is not zeroed yet, do it now */
703 if (!vq->hw->has_tx_offload)
704 virtqueue_clear_net_hdr(hdr);
706 virtqueue_xmit_offload(hdr, cookie, true);
708 dp->addr = VIRTIO_MBUF_DATA_DMA_ADDR(cookie, vq) - head_size;
709 dp->len = cookie->data_len + head_size;
712 if (++vq->vq_avail_idx >= vq->vq_nentries) {
713 vq->vq_avail_idx -= vq->vq_nentries;
714 vq->vq_packed.cached_flags ^= VRING_PACKED_DESC_F_AVAIL_USED;
720 vq->vq_desc_head_idx = dxp->next;
721 if (vq->vq_desc_head_idx == VQ_RING_DESC_CHAIN_END)
722 vq->vq_desc_tail_idx = VQ_RING_DESC_CHAIN_END;
725 virtqueue_store_flags_packed(dp, flags, vq->hw->weak_barriers);
729 virtqueue_enqueue_xmit_packed(struct virtnet_tx *txvq, struct rte_mbuf *cookie,
730 uint16_t needed, int can_push, int in_order)
732 struct virtio_tx_region *txr = txvq->virtio_net_hdr_mz->addr;
733 struct vq_desc_extra *dxp;
734 struct virtqueue *vq = txvq->vq;
735 struct vring_packed_desc *start_dp, *head_dp;
736 uint16_t idx, id, head_idx, head_flags;
737 uint16_t head_size = vq->hw->vtnet_hdr_size;
738 struct virtio_net_hdr *hdr;
740 bool prepend_header = false;
742 id = in_order ? vq->vq_avail_idx : vq->vq_desc_head_idx;
744 dxp = &vq->vq_descx[id];
745 dxp->ndescs = needed;
746 dxp->cookie = cookie;
748 head_idx = vq->vq_avail_idx;
751 start_dp = vq->vq_packed.ring.desc;
753 head_dp = &vq->vq_packed.ring.desc[idx];
754 head_flags = cookie->next ? VRING_DESC_F_NEXT : 0;
755 head_flags |= vq->vq_packed.cached_flags;
758 /* prepend cannot fail, checked by caller */
759 hdr = (struct virtio_net_hdr *)(char *)cookie->buf_addr +
760 cookie->data_off - head_size;
761 prepend_header = true;
763 /* if offload disabled, it is not zeroed below, do it now */
764 if (!vq->hw->has_tx_offload)
765 virtqueue_clear_net_hdr(hdr);
767 /* setup first tx ring slot to point to header
768 * stored in reserved region.
770 start_dp[idx].addr = txvq->virtio_net_hdr_mem +
771 RTE_PTR_DIFF(&txr[idx].tx_hdr, txr);
772 start_dp[idx].len = vq->hw->vtnet_hdr_size;
773 hdr = (struct virtio_net_hdr *)&txr[idx].tx_hdr;
775 if (idx >= vq->vq_nentries) {
776 idx -= vq->vq_nentries;
777 vq->vq_packed.cached_flags ^=
778 VRING_PACKED_DESC_F_AVAIL_USED;
782 virtqueue_xmit_offload(hdr, cookie, vq->hw->has_tx_offload);
787 start_dp[idx].addr = VIRTIO_MBUF_DATA_DMA_ADDR(cookie, vq);
788 start_dp[idx].len = cookie->data_len;
789 if (prepend_header) {
790 start_dp[idx].addr -= head_size;
791 start_dp[idx].len += head_size;
792 prepend_header = false;
795 if (likely(idx != head_idx)) {
796 flags = cookie->next ? VRING_DESC_F_NEXT : 0;
797 flags |= vq->vq_packed.cached_flags;
798 start_dp[idx].flags = flags;
802 if (idx >= vq->vq_nentries) {
803 idx -= vq->vq_nentries;
804 vq->vq_packed.cached_flags ^=
805 VRING_PACKED_DESC_F_AVAIL_USED;
807 } while ((cookie = cookie->next) != NULL);
809 start_dp[prev].id = id;
811 vq->vq_free_cnt = (uint16_t)(vq->vq_free_cnt - needed);
812 vq->vq_avail_idx = idx;
815 vq->vq_desc_head_idx = dxp->next;
816 if (vq->vq_desc_head_idx == VQ_RING_DESC_CHAIN_END)
817 vq->vq_desc_tail_idx = VQ_RING_DESC_CHAIN_END;
820 virtqueue_store_flags_packed(head_dp, head_flags,
821 vq->hw->weak_barriers);
825 virtqueue_enqueue_xmit(struct virtnet_tx *txvq, struct rte_mbuf *cookie,
826 uint16_t needed, int use_indirect, int can_push,
829 struct virtio_tx_region *txr = txvq->virtio_net_hdr_mz->addr;
830 struct vq_desc_extra *dxp;
831 struct virtqueue *vq = txvq->vq;
832 struct vring_desc *start_dp;
833 uint16_t seg_num = cookie->nb_segs;
834 uint16_t head_idx, idx;
835 uint16_t head_size = vq->hw->vtnet_hdr_size;
836 bool prepend_header = false;
837 struct virtio_net_hdr *hdr;
839 head_idx = vq->vq_desc_head_idx;
842 dxp = &vq->vq_descx[vq->vq_avail_idx & (vq->vq_nentries - 1)];
844 dxp = &vq->vq_descx[idx];
845 dxp->cookie = (void *)cookie;
846 dxp->ndescs = needed;
848 start_dp = vq->vq_split.ring.desc;
851 /* prepend cannot fail, checked by caller */
852 hdr = (struct virtio_net_hdr *)(char *)cookie->buf_addr +
853 cookie->data_off - head_size;
854 prepend_header = true;
856 /* if offload disabled, it is not zeroed below, do it now */
857 if (!vq->hw->has_tx_offload)
858 virtqueue_clear_net_hdr(hdr);
859 } else if (use_indirect) {
860 /* setup tx ring slot to point to indirect
861 * descriptor list stored in reserved region.
863 * the first slot in indirect ring is already preset
864 * to point to the header in reserved region
866 start_dp[idx].addr = txvq->virtio_net_hdr_mem +
867 RTE_PTR_DIFF(&txr[idx].tx_indir, txr);
868 start_dp[idx].len = (seg_num + 1) * sizeof(struct vring_desc);
869 start_dp[idx].flags = VRING_DESC_F_INDIRECT;
870 hdr = (struct virtio_net_hdr *)&txr[idx].tx_hdr;
872 /* loop below will fill in rest of the indirect elements */
873 start_dp = txr[idx].tx_indir;
876 /* setup first tx ring slot to point to header
877 * stored in reserved region.
879 start_dp[idx].addr = txvq->virtio_net_hdr_mem +
880 RTE_PTR_DIFF(&txr[idx].tx_hdr, txr);
881 start_dp[idx].len = vq->hw->vtnet_hdr_size;
882 start_dp[idx].flags = VRING_DESC_F_NEXT;
883 hdr = (struct virtio_net_hdr *)&txr[idx].tx_hdr;
885 idx = start_dp[idx].next;
888 virtqueue_xmit_offload(hdr, cookie, vq->hw->has_tx_offload);
891 start_dp[idx].addr = VIRTIO_MBUF_DATA_DMA_ADDR(cookie, vq);
892 start_dp[idx].len = cookie->data_len;
893 if (prepend_header) {
894 start_dp[idx].addr -= head_size;
895 start_dp[idx].len += head_size;
896 prepend_header = false;
898 start_dp[idx].flags = cookie->next ? VRING_DESC_F_NEXT : 0;
899 idx = start_dp[idx].next;
900 } while ((cookie = cookie->next) != NULL);
903 idx = vq->vq_split.ring.desc[head_idx].next;
905 vq->vq_free_cnt = (uint16_t)(vq->vq_free_cnt - needed);
907 vq->vq_desc_head_idx = idx;
908 vq_update_avail_ring(vq, head_idx);
911 if (vq->vq_desc_head_idx == VQ_RING_DESC_CHAIN_END)
912 vq->vq_desc_tail_idx = idx;
917 virtio_dev_cq_start(struct rte_eth_dev *dev)
919 struct virtio_hw *hw = dev->data->dev_private;
921 if (hw->cvq && hw->cvq->vq) {
922 rte_spinlock_init(&hw->cvq->lock);
923 VIRTQUEUE_DUMP((struct virtqueue *)hw->cvq->vq);
928 virtio_dev_rx_queue_setup(struct rte_eth_dev *dev,
931 unsigned int socket_id __rte_unused,
932 const struct rte_eth_rxconf *rx_conf,
933 struct rte_mempool *mp)
935 uint16_t vtpci_queue_idx = 2 * queue_idx + VTNET_SQ_RQ_QUEUE_IDX;
936 struct virtio_hw *hw = dev->data->dev_private;
937 struct virtqueue *vq = hw->vqs[vtpci_queue_idx];
938 struct virtnet_rx *rxvq;
940 PMD_INIT_FUNC_TRACE();
942 if (rx_conf->rx_deferred_start) {
943 PMD_INIT_LOG(ERR, "Rx deferred start is not supported");
947 if (nb_desc == 0 || nb_desc > vq->vq_nentries)
948 nb_desc = vq->vq_nentries;
949 vq->vq_free_cnt = RTE_MIN(vq->vq_free_cnt, nb_desc);
952 rxvq->queue_id = queue_idx;
954 dev->data->rx_queues[queue_idx] = rxvq;
960 virtio_dev_rx_queue_setup_finish(struct rte_eth_dev *dev, uint16_t queue_idx)
962 uint16_t vtpci_queue_idx = 2 * queue_idx + VTNET_SQ_RQ_QUEUE_IDX;
963 struct virtio_hw *hw = dev->data->dev_private;
964 struct virtqueue *vq = hw->vqs[vtpci_queue_idx];
965 struct virtnet_rx *rxvq = &vq->rxq;
970 PMD_INIT_FUNC_TRACE();
972 /* Allocate blank mbufs for the each rx descriptor */
975 if (hw->use_simple_rx) {
976 for (desc_idx = 0; desc_idx < vq->vq_nentries;
978 vq->vq_split.ring.avail->ring[desc_idx] = desc_idx;
979 vq->vq_split.ring.desc[desc_idx].flags =
983 virtio_rxq_vec_setup(rxvq);
986 memset(&rxvq->fake_mbuf, 0, sizeof(rxvq->fake_mbuf));
987 for (desc_idx = 0; desc_idx < RTE_PMD_VIRTIO_RX_MAX_BURST;
989 vq->sw_ring[vq->vq_nentries + desc_idx] =
993 if (hw->use_simple_rx) {
994 while (vq->vq_free_cnt >= RTE_VIRTIO_VPMD_RX_REARM_THRESH) {
995 virtio_rxq_rearm_vec(rxvq);
996 nbufs += RTE_VIRTIO_VPMD_RX_REARM_THRESH;
998 } else if (hw->use_inorder_rx) {
999 if ((!virtqueue_full(vq))) {
1000 uint16_t free_cnt = vq->vq_free_cnt;
1001 struct rte_mbuf *pkts[free_cnt];
1003 if (!rte_pktmbuf_alloc_bulk(rxvq->mpool, pkts,
1005 error = virtqueue_enqueue_refill_inorder(vq,
1008 if (unlikely(error)) {
1009 for (i = 0; i < free_cnt; i++)
1010 rte_pktmbuf_free(pkts[i]);
1015 vq_update_avail_idx(vq);
1018 while (!virtqueue_full(vq)) {
1019 m = rte_mbuf_raw_alloc(rxvq->mpool);
1023 /* Enqueue allocated buffers */
1024 if (vtpci_packed_queue(vq->hw))
1025 error = virtqueue_enqueue_recv_refill_packed(vq,
1028 error = virtqueue_enqueue_recv_refill(vq,
1031 rte_pktmbuf_free(m);
1037 if (!vtpci_packed_queue(vq->hw))
1038 vq_update_avail_idx(vq);
1041 PMD_INIT_LOG(DEBUG, "Allocated %d bufs", nbufs);
1049 * struct rte_eth_dev *dev: Used to update dev
1050 * uint16_t nb_desc: Defaults to values read from config space
1051 * unsigned int socket_id: Used to allocate memzone
1052 * const struct rte_eth_txconf *tx_conf: Used to setup tx engine
1053 * uint16_t queue_idx: Just used as an index in dev txq list
1056 virtio_dev_tx_queue_setup(struct rte_eth_dev *dev,
1059 unsigned int socket_id __rte_unused,
1060 const struct rte_eth_txconf *tx_conf)
1062 uint8_t vtpci_queue_idx = 2 * queue_idx + VTNET_SQ_TQ_QUEUE_IDX;
1063 struct virtio_hw *hw = dev->data->dev_private;
1064 struct virtqueue *vq = hw->vqs[vtpci_queue_idx];
1065 struct virtnet_tx *txvq;
1066 uint16_t tx_free_thresh;
1068 PMD_INIT_FUNC_TRACE();
1070 if (nb_desc == 0 || nb_desc > vq->vq_nentries)
1071 nb_desc = vq->vq_nentries;
1072 vq->vq_free_cnt = RTE_MIN(vq->vq_free_cnt, nb_desc);
1075 txvq->queue_id = queue_idx;
1077 tx_free_thresh = tx_conf->tx_free_thresh;
1078 if (tx_free_thresh == 0)
1080 RTE_MIN(vq->vq_nentries / 4, DEFAULT_TX_FREE_THRESH);
1082 if (tx_free_thresh >= (vq->vq_nentries - 3)) {
1083 RTE_LOG(ERR, PMD, "tx_free_thresh must be less than the "
1084 "number of TX entries minus 3 (%u)."
1085 " (tx_free_thresh=%u port=%u queue=%u)\n",
1086 vq->vq_nentries - 3,
1087 tx_free_thresh, dev->data->port_id, queue_idx);
1091 vq->vq_free_thresh = tx_free_thresh;
1093 dev->data->tx_queues[queue_idx] = txvq;
1098 virtio_dev_tx_queue_setup_finish(struct rte_eth_dev *dev,
1101 uint8_t vtpci_queue_idx = 2 * queue_idx + VTNET_SQ_TQ_QUEUE_IDX;
1102 struct virtio_hw *hw = dev->data->dev_private;
1103 struct virtqueue *vq = hw->vqs[vtpci_queue_idx];
1105 PMD_INIT_FUNC_TRACE();
1107 if (!vtpci_packed_queue(hw)) {
1108 if (hw->use_inorder_tx)
1109 vq->vq_split.ring.desc[vq->vq_nentries - 1].next = 0;
1118 virtio_discard_rxbuf(struct virtqueue *vq, struct rte_mbuf *m)
1122 * Requeue the discarded mbuf. This should always be
1123 * successful since it was just dequeued.
1125 if (vtpci_packed_queue(vq->hw))
1126 error = virtqueue_enqueue_recv_refill_packed(vq, &m, 1);
1128 error = virtqueue_enqueue_recv_refill(vq, &m, 1);
1130 if (unlikely(error)) {
1131 RTE_LOG(ERR, PMD, "cannot requeue discarded mbuf");
1132 rte_pktmbuf_free(m);
1137 virtio_discard_rxbuf_inorder(struct virtqueue *vq, struct rte_mbuf *m)
1141 error = virtqueue_enqueue_refill_inorder(vq, &m, 1);
1142 if (unlikely(error)) {
1143 RTE_LOG(ERR, PMD, "cannot requeue discarded mbuf");
1144 rte_pktmbuf_free(m);
1148 /* Optionally fill offload information in structure */
1150 virtio_rx_offload(struct rte_mbuf *m, struct virtio_net_hdr *hdr)
1152 struct rte_net_hdr_lens hdr_lens;
1153 uint32_t hdrlen, ptype;
1154 int l4_supported = 0;
1157 if (hdr->flags == 0 && hdr->gso_type == VIRTIO_NET_HDR_GSO_NONE)
1160 m->ol_flags |= PKT_RX_IP_CKSUM_UNKNOWN;
1162 ptype = rte_net_get_ptype(m, &hdr_lens, RTE_PTYPE_ALL_MASK);
1163 m->packet_type = ptype;
1164 if ((ptype & RTE_PTYPE_L4_MASK) == RTE_PTYPE_L4_TCP ||
1165 (ptype & RTE_PTYPE_L4_MASK) == RTE_PTYPE_L4_UDP ||
1166 (ptype & RTE_PTYPE_L4_MASK) == RTE_PTYPE_L4_SCTP)
1169 if (hdr->flags & VIRTIO_NET_HDR_F_NEEDS_CSUM) {
1170 hdrlen = hdr_lens.l2_len + hdr_lens.l3_len + hdr_lens.l4_len;
1171 if (hdr->csum_start <= hdrlen && l4_supported) {
1172 m->ol_flags |= PKT_RX_L4_CKSUM_NONE;
1174 /* Unknown proto or tunnel, do sw cksum. We can assume
1175 * the cksum field is in the first segment since the
1176 * buffers we provided to the host are large enough.
1177 * In case of SCTP, this will be wrong since it's a CRC
1178 * but there's nothing we can do.
1180 uint16_t csum = 0, off;
1182 rte_raw_cksum_mbuf(m, hdr->csum_start,
1183 rte_pktmbuf_pkt_len(m) - hdr->csum_start,
1185 if (likely(csum != 0xffff))
1187 off = hdr->csum_offset + hdr->csum_start;
1188 if (rte_pktmbuf_data_len(m) >= off + 1)
1189 *rte_pktmbuf_mtod_offset(m, uint16_t *,
1192 } else if (hdr->flags & VIRTIO_NET_HDR_F_DATA_VALID && l4_supported) {
1193 m->ol_flags |= PKT_RX_L4_CKSUM_GOOD;
1196 /* GSO request, save required information in mbuf */
1197 if (hdr->gso_type != VIRTIO_NET_HDR_GSO_NONE) {
1198 /* Check unsupported modes */
1199 if ((hdr->gso_type & VIRTIO_NET_HDR_GSO_ECN) ||
1200 (hdr->gso_size == 0)) {
1204 /* Update mss lengthes in mbuf */
1205 m->tso_segsz = hdr->gso_size;
1206 switch (hdr->gso_type & ~VIRTIO_NET_HDR_GSO_ECN) {
1207 case VIRTIO_NET_HDR_GSO_TCPV4:
1208 case VIRTIO_NET_HDR_GSO_TCPV6:
1209 m->ol_flags |= PKT_RX_LRO | \
1210 PKT_RX_L4_CKSUM_NONE;
1220 #define VIRTIO_MBUF_BURST_SZ 64
1221 #define DESC_PER_CACHELINE (RTE_CACHE_LINE_SIZE / sizeof(struct vring_desc))
1223 virtio_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts, uint16_t nb_pkts)
1225 struct virtnet_rx *rxvq = rx_queue;
1226 struct virtqueue *vq = rxvq->vq;
1227 struct virtio_hw *hw = vq->hw;
1228 struct rte_mbuf *rxm;
1229 uint16_t nb_used, num, nb_rx;
1230 uint32_t len[VIRTIO_MBUF_BURST_SZ];
1231 struct rte_mbuf *rcv_pkts[VIRTIO_MBUF_BURST_SZ];
1233 uint32_t i, nb_enqueued;
1235 struct virtio_net_hdr *hdr;
1238 if (unlikely(hw->started == 0))
1241 nb_used = VIRTQUEUE_NUSED(vq);
1243 virtio_rmb(hw->weak_barriers);
1245 num = likely(nb_used <= nb_pkts) ? nb_used : nb_pkts;
1246 if (unlikely(num > VIRTIO_MBUF_BURST_SZ))
1247 num = VIRTIO_MBUF_BURST_SZ;
1248 if (likely(num > DESC_PER_CACHELINE))
1249 num = num - ((vq->vq_used_cons_idx + num) % DESC_PER_CACHELINE);
1251 num = virtqueue_dequeue_burst_rx(vq, rcv_pkts, len, num);
1252 PMD_RX_LOG(DEBUG, "used:%d dequeue:%d", nb_used, num);
1255 hdr_size = hw->vtnet_hdr_size;
1257 for (i = 0; i < num ; i++) {
1260 PMD_RX_LOG(DEBUG, "packet len:%d", len[i]);
1262 if (unlikely(len[i] < hdr_size + RTE_ETHER_HDR_LEN)) {
1263 PMD_RX_LOG(ERR, "Packet drop");
1265 virtio_discard_rxbuf(vq, rxm);
1266 rxvq->stats.errors++;
1270 rxm->port = rxvq->port_id;
1271 rxm->data_off = RTE_PKTMBUF_HEADROOM;
1275 rxm->pkt_len = (uint32_t)(len[i] - hdr_size);
1276 rxm->data_len = (uint16_t)(len[i] - hdr_size);
1278 hdr = (struct virtio_net_hdr *)((char *)rxm->buf_addr +
1279 RTE_PKTMBUF_HEADROOM - hdr_size);
1282 rte_vlan_strip(rxm);
1284 if (hw->has_rx_offload && virtio_rx_offload(rxm, hdr) < 0) {
1285 virtio_discard_rxbuf(vq, rxm);
1286 rxvq->stats.errors++;
1290 virtio_rx_stats_updated(rxvq, rxm);
1292 rx_pkts[nb_rx++] = rxm;
1295 rxvq->stats.packets += nb_rx;
1297 /* Allocate new mbuf for the used descriptor */
1298 if (likely(!virtqueue_full(vq))) {
1299 uint16_t free_cnt = vq->vq_free_cnt;
1300 struct rte_mbuf *new_pkts[free_cnt];
1302 if (likely(rte_pktmbuf_alloc_bulk(rxvq->mpool, new_pkts,
1304 error = virtqueue_enqueue_recv_refill(vq, new_pkts,
1306 if (unlikely(error)) {
1307 for (i = 0; i < free_cnt; i++)
1308 rte_pktmbuf_free(new_pkts[i]);
1310 nb_enqueued += free_cnt;
1312 struct rte_eth_dev *dev =
1313 &rte_eth_devices[rxvq->port_id];
1314 dev->data->rx_mbuf_alloc_failed += free_cnt;
1318 if (likely(nb_enqueued)) {
1319 vq_update_avail_idx(vq);
1321 if (unlikely(virtqueue_kick_prepare(vq))) {
1322 virtqueue_notify(vq);
1323 PMD_RX_LOG(DEBUG, "Notified");
1331 virtio_recv_pkts_packed(void *rx_queue, struct rte_mbuf **rx_pkts,
1334 struct virtnet_rx *rxvq = rx_queue;
1335 struct virtqueue *vq = rxvq->vq;
1336 struct virtio_hw *hw = vq->hw;
1337 struct rte_mbuf *rxm;
1338 uint16_t num, nb_rx;
1339 uint32_t len[VIRTIO_MBUF_BURST_SZ];
1340 struct rte_mbuf *rcv_pkts[VIRTIO_MBUF_BURST_SZ];
1342 uint32_t i, nb_enqueued;
1344 struct virtio_net_hdr *hdr;
1347 if (unlikely(hw->started == 0))
1350 num = RTE_MIN(VIRTIO_MBUF_BURST_SZ, nb_pkts);
1351 if (likely(num > DESC_PER_CACHELINE))
1352 num = num - ((vq->vq_used_cons_idx + num) % DESC_PER_CACHELINE);
1354 num = virtqueue_dequeue_burst_rx_packed(vq, rcv_pkts, len, num);
1355 PMD_RX_LOG(DEBUG, "dequeue:%d", num);
1358 hdr_size = hw->vtnet_hdr_size;
1360 for (i = 0; i < num; i++) {
1363 PMD_RX_LOG(DEBUG, "packet len:%d", len[i]);
1365 if (unlikely(len[i] < hdr_size + RTE_ETHER_HDR_LEN)) {
1366 PMD_RX_LOG(ERR, "Packet drop");
1368 virtio_discard_rxbuf(vq, rxm);
1369 rxvq->stats.errors++;
1373 rxm->port = rxvq->port_id;
1374 rxm->data_off = RTE_PKTMBUF_HEADROOM;
1378 rxm->pkt_len = (uint32_t)(len[i] - hdr_size);
1379 rxm->data_len = (uint16_t)(len[i] - hdr_size);
1381 hdr = (struct virtio_net_hdr *)((char *)rxm->buf_addr +
1382 RTE_PKTMBUF_HEADROOM - hdr_size);
1385 rte_vlan_strip(rxm);
1387 if (hw->has_rx_offload && virtio_rx_offload(rxm, hdr) < 0) {
1388 virtio_discard_rxbuf(vq, rxm);
1389 rxvq->stats.errors++;
1393 virtio_rx_stats_updated(rxvq, rxm);
1395 rx_pkts[nb_rx++] = rxm;
1398 rxvq->stats.packets += nb_rx;
1400 /* Allocate new mbuf for the used descriptor */
1401 if (likely(!virtqueue_full(vq))) {
1402 uint16_t free_cnt = vq->vq_free_cnt;
1403 struct rte_mbuf *new_pkts[free_cnt];
1405 if (likely(rte_pktmbuf_alloc_bulk(rxvq->mpool, new_pkts,
1407 error = virtqueue_enqueue_recv_refill_packed(vq,
1408 new_pkts, free_cnt);
1409 if (unlikely(error)) {
1410 for (i = 0; i < free_cnt; i++)
1411 rte_pktmbuf_free(new_pkts[i]);
1413 nb_enqueued += free_cnt;
1415 struct rte_eth_dev *dev =
1416 &rte_eth_devices[rxvq->port_id];
1417 dev->data->rx_mbuf_alloc_failed += free_cnt;
1421 if (likely(nb_enqueued)) {
1422 if (unlikely(virtqueue_kick_prepare_packed(vq))) {
1423 virtqueue_notify(vq);
1424 PMD_RX_LOG(DEBUG, "Notified");
1433 virtio_recv_pkts_inorder(void *rx_queue,
1434 struct rte_mbuf **rx_pkts,
1437 struct virtnet_rx *rxvq = rx_queue;
1438 struct virtqueue *vq = rxvq->vq;
1439 struct virtio_hw *hw = vq->hw;
1440 struct rte_mbuf *rxm;
1441 struct rte_mbuf *prev = NULL;
1442 uint16_t nb_used, num, nb_rx;
1443 uint32_t len[VIRTIO_MBUF_BURST_SZ];
1444 struct rte_mbuf *rcv_pkts[VIRTIO_MBUF_BURST_SZ];
1446 uint32_t nb_enqueued;
1453 if (unlikely(hw->started == 0))
1456 nb_used = VIRTQUEUE_NUSED(vq);
1457 nb_used = RTE_MIN(nb_used, nb_pkts);
1458 nb_used = RTE_MIN(nb_used, VIRTIO_MBUF_BURST_SZ);
1460 virtio_rmb(hw->weak_barriers);
1462 PMD_RX_LOG(DEBUG, "used:%d", nb_used);
1467 hdr_size = hw->vtnet_hdr_size;
1469 num = virtqueue_dequeue_rx_inorder(vq, rcv_pkts, len, nb_used);
1471 for (i = 0; i < num; i++) {
1472 struct virtio_net_hdr_mrg_rxbuf *header;
1474 PMD_RX_LOG(DEBUG, "dequeue:%d", num);
1475 PMD_RX_LOG(DEBUG, "packet len:%d", len[i]);
1479 if (unlikely(len[i] < hdr_size + RTE_ETHER_HDR_LEN)) {
1480 PMD_RX_LOG(ERR, "Packet drop");
1482 virtio_discard_rxbuf_inorder(vq, rxm);
1483 rxvq->stats.errors++;
1487 header = (struct virtio_net_hdr_mrg_rxbuf *)
1488 ((char *)rxm->buf_addr + RTE_PKTMBUF_HEADROOM
1491 if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF)) {
1492 seg_num = header->num_buffers;
1499 rxm->data_off = RTE_PKTMBUF_HEADROOM;
1500 rxm->nb_segs = seg_num;
1503 rxm->pkt_len = (uint32_t)(len[i] - hdr_size);
1504 rxm->data_len = (uint16_t)(len[i] - hdr_size);
1506 rxm->port = rxvq->port_id;
1508 rx_pkts[nb_rx] = rxm;
1511 if (vq->hw->has_rx_offload &&
1512 virtio_rx_offload(rxm, &header->hdr) < 0) {
1513 virtio_discard_rxbuf_inorder(vq, rxm);
1514 rxvq->stats.errors++;
1519 rte_vlan_strip(rx_pkts[nb_rx]);
1521 seg_res = seg_num - 1;
1523 /* Merge remaining segments */
1524 while (seg_res != 0 && i < (num - 1)) {
1528 rxm->data_off = RTE_PKTMBUF_HEADROOM - hdr_size;
1529 rxm->pkt_len = (uint32_t)(len[i]);
1530 rxm->data_len = (uint16_t)(len[i]);
1532 rx_pkts[nb_rx]->pkt_len += (uint32_t)(len[i]);
1540 virtio_rx_stats_updated(rxvq, rx_pkts[nb_rx]);
1545 /* Last packet still need merge segments */
1546 while (seg_res != 0) {
1547 uint16_t rcv_cnt = RTE_MIN((uint16_t)seg_res,
1548 VIRTIO_MBUF_BURST_SZ);
1550 if (likely(VIRTQUEUE_NUSED(vq) >= rcv_cnt)) {
1551 virtio_rmb(hw->weak_barriers);
1552 num = virtqueue_dequeue_rx_inorder(vq, rcv_pkts, len,
1554 uint16_t extra_idx = 0;
1557 while (extra_idx < rcv_cnt) {
1558 rxm = rcv_pkts[extra_idx];
1560 RTE_PKTMBUF_HEADROOM - hdr_size;
1561 rxm->pkt_len = (uint32_t)(len[extra_idx]);
1562 rxm->data_len = (uint16_t)(len[extra_idx]);
1565 rx_pkts[nb_rx]->pkt_len += len[extra_idx];
1571 virtio_rx_stats_updated(rxvq, rx_pkts[nb_rx]);
1576 "No enough segments for packet.");
1577 rte_pktmbuf_free(rx_pkts[nb_rx]);
1578 rxvq->stats.errors++;
1583 rxvq->stats.packets += nb_rx;
1585 /* Allocate new mbuf for the used descriptor */
1587 if (likely(!virtqueue_full(vq))) {
1588 /* free_cnt may include mrg descs */
1589 uint16_t free_cnt = vq->vq_free_cnt;
1590 struct rte_mbuf *new_pkts[free_cnt];
1592 if (!rte_pktmbuf_alloc_bulk(rxvq->mpool, new_pkts, free_cnt)) {
1593 error = virtqueue_enqueue_refill_inorder(vq, new_pkts,
1595 if (unlikely(error)) {
1596 for (i = 0; i < free_cnt; i++)
1597 rte_pktmbuf_free(new_pkts[i]);
1599 nb_enqueued += free_cnt;
1601 struct rte_eth_dev *dev =
1602 &rte_eth_devices[rxvq->port_id];
1603 dev->data->rx_mbuf_alloc_failed += free_cnt;
1607 if (likely(nb_enqueued)) {
1608 vq_update_avail_idx(vq);
1610 if (unlikely(virtqueue_kick_prepare(vq))) {
1611 virtqueue_notify(vq);
1612 PMD_RX_LOG(DEBUG, "Notified");
1620 virtio_recv_mergeable_pkts(void *rx_queue,
1621 struct rte_mbuf **rx_pkts,
1624 struct virtnet_rx *rxvq = rx_queue;
1625 struct virtqueue *vq = rxvq->vq;
1626 struct virtio_hw *hw = vq->hw;
1627 struct rte_mbuf *rxm;
1628 struct rte_mbuf *prev = NULL;
1629 uint16_t nb_used, num, nb_rx = 0;
1630 uint32_t len[VIRTIO_MBUF_BURST_SZ];
1631 struct rte_mbuf *rcv_pkts[VIRTIO_MBUF_BURST_SZ];
1633 uint32_t nb_enqueued = 0;
1634 uint32_t seg_num = 0;
1635 uint32_t seg_res = 0;
1636 uint32_t hdr_size = hw->vtnet_hdr_size;
1639 if (unlikely(hw->started == 0))
1642 nb_used = VIRTQUEUE_NUSED(vq);
1644 virtio_rmb(hw->weak_barriers);
1646 PMD_RX_LOG(DEBUG, "used:%d", nb_used);
1648 num = likely(nb_used <= nb_pkts) ? nb_used : nb_pkts;
1649 if (unlikely(num > VIRTIO_MBUF_BURST_SZ))
1650 num = VIRTIO_MBUF_BURST_SZ;
1651 if (likely(num > DESC_PER_CACHELINE))
1652 num = num - ((vq->vq_used_cons_idx + num) %
1653 DESC_PER_CACHELINE);
1656 num = virtqueue_dequeue_burst_rx(vq, rcv_pkts, len, num);
1658 for (i = 0; i < num; i++) {
1659 struct virtio_net_hdr_mrg_rxbuf *header;
1661 PMD_RX_LOG(DEBUG, "dequeue:%d", num);
1662 PMD_RX_LOG(DEBUG, "packet len:%d", len[i]);
1666 if (unlikely(len[i] < hdr_size + RTE_ETHER_HDR_LEN)) {
1667 PMD_RX_LOG(ERR, "Packet drop");
1669 virtio_discard_rxbuf(vq, rxm);
1670 rxvq->stats.errors++;
1674 header = (struct virtio_net_hdr_mrg_rxbuf *)
1675 ((char *)rxm->buf_addr + RTE_PKTMBUF_HEADROOM
1677 seg_num = header->num_buffers;
1681 rxm->data_off = RTE_PKTMBUF_HEADROOM;
1682 rxm->nb_segs = seg_num;
1685 rxm->pkt_len = (uint32_t)(len[i] - hdr_size);
1686 rxm->data_len = (uint16_t)(len[i] - hdr_size);
1688 rxm->port = rxvq->port_id;
1690 rx_pkts[nb_rx] = rxm;
1693 if (hw->has_rx_offload &&
1694 virtio_rx_offload(rxm, &header->hdr) < 0) {
1695 virtio_discard_rxbuf(vq, rxm);
1696 rxvq->stats.errors++;
1701 rte_vlan_strip(rx_pkts[nb_rx]);
1703 seg_res = seg_num - 1;
1705 /* Merge remaining segments */
1706 while (seg_res != 0 && i < (num - 1)) {
1710 rxm->data_off = RTE_PKTMBUF_HEADROOM - hdr_size;
1711 rxm->pkt_len = (uint32_t)(len[i]);
1712 rxm->data_len = (uint16_t)(len[i]);
1714 rx_pkts[nb_rx]->pkt_len += (uint32_t)(len[i]);
1722 virtio_rx_stats_updated(rxvq, rx_pkts[nb_rx]);
1727 /* Last packet still need merge segments */
1728 while (seg_res != 0) {
1729 uint16_t rcv_cnt = RTE_MIN((uint16_t)seg_res,
1730 VIRTIO_MBUF_BURST_SZ);
1732 if (likely(VIRTQUEUE_NUSED(vq) >= rcv_cnt)) {
1733 virtio_rmb(hw->weak_barriers);
1734 num = virtqueue_dequeue_burst_rx(vq, rcv_pkts, len,
1736 uint16_t extra_idx = 0;
1739 while (extra_idx < rcv_cnt) {
1740 rxm = rcv_pkts[extra_idx];
1742 RTE_PKTMBUF_HEADROOM - hdr_size;
1743 rxm->pkt_len = (uint32_t)(len[extra_idx]);
1744 rxm->data_len = (uint16_t)(len[extra_idx]);
1747 rx_pkts[nb_rx]->pkt_len += len[extra_idx];
1753 virtio_rx_stats_updated(rxvq, rx_pkts[nb_rx]);
1758 "No enough segments for packet.");
1759 rte_pktmbuf_free(rx_pkts[nb_rx]);
1760 rxvq->stats.errors++;
1765 rxvq->stats.packets += nb_rx;
1767 /* Allocate new mbuf for the used descriptor */
1768 if (likely(!virtqueue_full(vq))) {
1769 /* free_cnt may include mrg descs */
1770 uint16_t free_cnt = vq->vq_free_cnt;
1771 struct rte_mbuf *new_pkts[free_cnt];
1773 if (!rte_pktmbuf_alloc_bulk(rxvq->mpool, new_pkts, free_cnt)) {
1774 error = virtqueue_enqueue_recv_refill(vq, new_pkts,
1776 if (unlikely(error)) {
1777 for (i = 0; i < free_cnt; i++)
1778 rte_pktmbuf_free(new_pkts[i]);
1780 nb_enqueued += free_cnt;
1782 struct rte_eth_dev *dev =
1783 &rte_eth_devices[rxvq->port_id];
1784 dev->data->rx_mbuf_alloc_failed += free_cnt;
1788 if (likely(nb_enqueued)) {
1789 vq_update_avail_idx(vq);
1791 if (unlikely(virtqueue_kick_prepare(vq))) {
1792 virtqueue_notify(vq);
1793 PMD_RX_LOG(DEBUG, "Notified");
1801 virtio_recv_mergeable_pkts_packed(void *rx_queue,
1802 struct rte_mbuf **rx_pkts,
1805 struct virtnet_rx *rxvq = rx_queue;
1806 struct virtqueue *vq = rxvq->vq;
1807 struct virtio_hw *hw = vq->hw;
1808 struct rte_mbuf *rxm;
1809 struct rte_mbuf *prev = NULL;
1810 uint16_t num, nb_rx = 0;
1811 uint32_t len[VIRTIO_MBUF_BURST_SZ];
1812 struct rte_mbuf *rcv_pkts[VIRTIO_MBUF_BURST_SZ];
1813 uint32_t nb_enqueued = 0;
1814 uint32_t seg_num = 0;
1815 uint32_t seg_res = 0;
1816 uint32_t hdr_size = hw->vtnet_hdr_size;
1820 if (unlikely(hw->started == 0))
1825 if (unlikely(num > VIRTIO_MBUF_BURST_SZ))
1826 num = VIRTIO_MBUF_BURST_SZ;
1827 if (likely(num > DESC_PER_CACHELINE))
1828 num = num - ((vq->vq_used_cons_idx + num) % DESC_PER_CACHELINE);
1830 num = virtqueue_dequeue_burst_rx_packed(vq, rcv_pkts, len, num);
1832 for (i = 0; i < num; i++) {
1833 struct virtio_net_hdr_mrg_rxbuf *header;
1835 PMD_RX_LOG(DEBUG, "dequeue:%d", num);
1836 PMD_RX_LOG(DEBUG, "packet len:%d", len[i]);
1840 if (unlikely(len[i] < hdr_size + RTE_ETHER_HDR_LEN)) {
1841 PMD_RX_LOG(ERR, "Packet drop");
1843 virtio_discard_rxbuf(vq, rxm);
1844 rxvq->stats.errors++;
1848 header = (struct virtio_net_hdr_mrg_rxbuf *)((char *)
1849 rxm->buf_addr + RTE_PKTMBUF_HEADROOM - hdr_size);
1850 seg_num = header->num_buffers;
1855 rxm->data_off = RTE_PKTMBUF_HEADROOM;
1856 rxm->nb_segs = seg_num;
1859 rxm->pkt_len = (uint32_t)(len[i] - hdr_size);
1860 rxm->data_len = (uint16_t)(len[i] - hdr_size);
1862 rxm->port = rxvq->port_id;
1863 rx_pkts[nb_rx] = rxm;
1866 if (hw->has_rx_offload &&
1867 virtio_rx_offload(rxm, &header->hdr) < 0) {
1868 virtio_discard_rxbuf(vq, rxm);
1869 rxvq->stats.errors++;
1874 rte_vlan_strip(rx_pkts[nb_rx]);
1876 seg_res = seg_num - 1;
1878 /* Merge remaining segments */
1879 while (seg_res != 0 && i < (num - 1)) {
1883 rxm->data_off = RTE_PKTMBUF_HEADROOM - hdr_size;
1884 rxm->pkt_len = (uint32_t)(len[i]);
1885 rxm->data_len = (uint16_t)(len[i]);
1887 rx_pkts[nb_rx]->pkt_len += (uint32_t)(len[i]);
1895 virtio_rx_stats_updated(rxvq, rx_pkts[nb_rx]);
1900 /* Last packet still need merge segments */
1901 while (seg_res != 0) {
1902 uint16_t rcv_cnt = RTE_MIN((uint16_t)seg_res,
1903 VIRTIO_MBUF_BURST_SZ);
1904 uint16_t extra_idx = 0;
1906 rcv_cnt = virtqueue_dequeue_burst_rx_packed(vq, rcv_pkts,
1908 if (unlikely(rcv_cnt == 0)) {
1909 PMD_RX_LOG(ERR, "No enough segments for packet.");
1910 rte_pktmbuf_free(rx_pkts[nb_rx]);
1911 rxvq->stats.errors++;
1915 while (extra_idx < rcv_cnt) {
1916 rxm = rcv_pkts[extra_idx];
1918 rxm->data_off = RTE_PKTMBUF_HEADROOM - hdr_size;
1919 rxm->pkt_len = (uint32_t)(len[extra_idx]);
1920 rxm->data_len = (uint16_t)(len[extra_idx]);
1924 rx_pkts[nb_rx]->pkt_len += len[extra_idx];
1929 virtio_rx_stats_updated(rxvq, rx_pkts[nb_rx]);
1934 rxvq->stats.packets += nb_rx;
1936 /* Allocate new mbuf for the used descriptor */
1937 if (likely(!virtqueue_full(vq))) {
1938 /* free_cnt may include mrg descs */
1939 uint16_t free_cnt = vq->vq_free_cnt;
1940 struct rte_mbuf *new_pkts[free_cnt];
1942 if (!rte_pktmbuf_alloc_bulk(rxvq->mpool, new_pkts, free_cnt)) {
1943 error = virtqueue_enqueue_recv_refill_packed(vq,
1944 new_pkts, free_cnt);
1945 if (unlikely(error)) {
1946 for (i = 0; i < free_cnt; i++)
1947 rte_pktmbuf_free(new_pkts[i]);
1949 nb_enqueued += free_cnt;
1951 struct rte_eth_dev *dev =
1952 &rte_eth_devices[rxvq->port_id];
1953 dev->data->rx_mbuf_alloc_failed += free_cnt;
1957 if (likely(nb_enqueued)) {
1958 if (unlikely(virtqueue_kick_prepare_packed(vq))) {
1959 virtqueue_notify(vq);
1960 PMD_RX_LOG(DEBUG, "Notified");
1968 virtio_xmit_pkts_prepare(void *tx_queue __rte_unused, struct rte_mbuf **tx_pkts,
1974 for (nb_tx = 0; nb_tx < nb_pkts; nb_tx++) {
1975 struct rte_mbuf *m = tx_pkts[nb_tx];
1977 #ifdef RTE_LIBRTE_ETHDEV_DEBUG
1978 error = rte_validate_tx_offload(m);
1979 if (unlikely(error)) {
1985 /* Do VLAN tag insertion */
1986 if (unlikely(m->ol_flags & PKT_TX_VLAN_PKT)) {
1987 error = rte_vlan_insert(&m);
1988 /* rte_vlan_insert() may change pointer
1989 * even in the case of failure
1993 if (unlikely(error)) {
1999 error = rte_net_intel_cksum_prepare(m);
2000 if (unlikely(error)) {
2005 if (m->ol_flags & PKT_TX_TCP_SEG)
2006 virtio_tso_fix_cksum(m);
2013 virtio_xmit_pkts_packed(void *tx_queue, struct rte_mbuf **tx_pkts,
2016 struct virtnet_tx *txvq = tx_queue;
2017 struct virtqueue *vq = txvq->vq;
2018 struct virtio_hw *hw = vq->hw;
2019 uint16_t hdr_size = hw->vtnet_hdr_size;
2021 bool in_order = hw->use_inorder_tx;
2023 if (unlikely(hw->started == 0 && tx_pkts != hw->inject_pkts))
2026 if (unlikely(nb_pkts < 1))
2029 PMD_TX_LOG(DEBUG, "%d packets to xmit", nb_pkts);
2031 if (nb_pkts > vq->vq_free_cnt)
2032 virtio_xmit_cleanup_packed(vq, nb_pkts - vq->vq_free_cnt,
2035 for (nb_tx = 0; nb_tx < nb_pkts; nb_tx++) {
2036 struct rte_mbuf *txm = tx_pkts[nb_tx];
2037 int can_push = 0, slots, need;
2039 /* optimize ring usage */
2040 if ((vtpci_with_feature(hw, VIRTIO_F_ANY_LAYOUT) ||
2041 vtpci_with_feature(hw, VIRTIO_F_VERSION_1)) &&
2042 rte_mbuf_refcnt_read(txm) == 1 &&
2043 RTE_MBUF_DIRECT(txm) &&
2044 txm->nb_segs == 1 &&
2045 rte_pktmbuf_headroom(txm) >= hdr_size &&
2046 rte_is_aligned(rte_pktmbuf_mtod(txm, char *),
2047 __alignof__(struct virtio_net_hdr_mrg_rxbuf)))
2050 /* How many main ring entries are needed to this Tx?
2051 * any_layout => number of segments
2052 * default => number of segments + 1
2054 slots = txm->nb_segs + !can_push;
2055 need = slots - vq->vq_free_cnt;
2057 /* Positive value indicates it need free vring descriptors */
2058 if (unlikely(need > 0)) {
2059 virtio_xmit_cleanup_packed(vq, need, in_order);
2060 need = slots - vq->vq_free_cnt;
2061 if (unlikely(need > 0)) {
2063 "No free tx descriptors to transmit");
2068 /* Enqueue Packet buffers */
2070 virtqueue_enqueue_xmit_packed_fast(txvq, txm, in_order);
2072 virtqueue_enqueue_xmit_packed(txvq, txm, slots, 0,
2075 virtio_update_packet_stats(&txvq->stats, txm);
2078 txvq->stats.packets += nb_tx;
2080 if (likely(nb_tx)) {
2081 if (unlikely(virtqueue_kick_prepare_packed(vq))) {
2082 virtqueue_notify(vq);
2083 PMD_TX_LOG(DEBUG, "Notified backend after xmit");
2091 virtio_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts, uint16_t nb_pkts)
2093 struct virtnet_tx *txvq = tx_queue;
2094 struct virtqueue *vq = txvq->vq;
2095 struct virtio_hw *hw = vq->hw;
2096 uint16_t hdr_size = hw->vtnet_hdr_size;
2097 uint16_t nb_used, nb_tx = 0;
2099 if (unlikely(hw->started == 0 && tx_pkts != hw->inject_pkts))
2102 if (unlikely(nb_pkts < 1))
2105 PMD_TX_LOG(DEBUG, "%d packets to xmit", nb_pkts);
2106 nb_used = VIRTQUEUE_NUSED(vq);
2108 virtio_rmb(hw->weak_barriers);
2109 if (likely(nb_used > vq->vq_nentries - vq->vq_free_thresh))
2110 virtio_xmit_cleanup(vq, nb_used);
2112 for (nb_tx = 0; nb_tx < nb_pkts; nb_tx++) {
2113 struct rte_mbuf *txm = tx_pkts[nb_tx];
2114 int can_push = 0, use_indirect = 0, slots, need;
2116 /* optimize ring usage */
2117 if ((vtpci_with_feature(hw, VIRTIO_F_ANY_LAYOUT) ||
2118 vtpci_with_feature(hw, VIRTIO_F_VERSION_1)) &&
2119 rte_mbuf_refcnt_read(txm) == 1 &&
2120 RTE_MBUF_DIRECT(txm) &&
2121 txm->nb_segs == 1 &&
2122 rte_pktmbuf_headroom(txm) >= hdr_size &&
2123 rte_is_aligned(rte_pktmbuf_mtod(txm, char *),
2124 __alignof__(struct virtio_net_hdr_mrg_rxbuf)))
2126 else if (vtpci_with_feature(hw, VIRTIO_RING_F_INDIRECT_DESC) &&
2127 txm->nb_segs < VIRTIO_MAX_TX_INDIRECT)
2130 /* How many main ring entries are needed to this Tx?
2131 * any_layout => number of segments
2133 * default => number of segments + 1
2135 slots = use_indirect ? 1 : (txm->nb_segs + !can_push);
2136 need = slots - vq->vq_free_cnt;
2138 /* Positive value indicates it need free vring descriptors */
2139 if (unlikely(need > 0)) {
2140 nb_used = VIRTQUEUE_NUSED(vq);
2141 virtio_rmb(hw->weak_barriers);
2142 need = RTE_MIN(need, (int)nb_used);
2144 virtio_xmit_cleanup(vq, need);
2145 need = slots - vq->vq_free_cnt;
2146 if (unlikely(need > 0)) {
2148 "No free tx descriptors to transmit");
2153 /* Enqueue Packet buffers */
2154 virtqueue_enqueue_xmit(txvq, txm, slots, use_indirect,
2157 virtio_update_packet_stats(&txvq->stats, txm);
2160 txvq->stats.packets += nb_tx;
2162 if (likely(nb_tx)) {
2163 vq_update_avail_idx(vq);
2165 if (unlikely(virtqueue_kick_prepare(vq))) {
2166 virtqueue_notify(vq);
2167 PMD_TX_LOG(DEBUG, "Notified backend after xmit");
2174 static __rte_always_inline int
2175 virtio_xmit_try_cleanup_inorder(struct virtqueue *vq, uint16_t need)
2177 uint16_t nb_used, nb_clean, nb_descs;
2178 struct virtio_hw *hw = vq->hw;
2180 nb_descs = vq->vq_free_cnt + need;
2181 nb_used = VIRTQUEUE_NUSED(vq);
2182 virtio_rmb(hw->weak_barriers);
2183 nb_clean = RTE_MIN(need, (int)nb_used);
2185 virtio_xmit_cleanup_inorder(vq, nb_clean);
2187 return nb_descs - vq->vq_free_cnt;
2191 virtio_xmit_pkts_inorder(void *tx_queue,
2192 struct rte_mbuf **tx_pkts,
2195 struct virtnet_tx *txvq = tx_queue;
2196 struct virtqueue *vq = txvq->vq;
2197 struct virtio_hw *hw = vq->hw;
2198 uint16_t hdr_size = hw->vtnet_hdr_size;
2199 uint16_t nb_used, nb_tx = 0, nb_inorder_pkts = 0;
2200 struct rte_mbuf *inorder_pkts[nb_pkts];
2203 if (unlikely(hw->started == 0 && tx_pkts != hw->inject_pkts))
2206 if (unlikely(nb_pkts < 1))
2210 PMD_TX_LOG(DEBUG, "%d packets to xmit", nb_pkts);
2211 nb_used = VIRTQUEUE_NUSED(vq);
2213 virtio_rmb(hw->weak_barriers);
2214 if (likely(nb_used > vq->vq_nentries - vq->vq_free_thresh))
2215 virtio_xmit_cleanup_inorder(vq, nb_used);
2217 for (nb_tx = 0; nb_tx < nb_pkts; nb_tx++) {
2218 struct rte_mbuf *txm = tx_pkts[nb_tx];
2221 /* optimize ring usage */
2222 if ((vtpci_with_feature(hw, VIRTIO_F_ANY_LAYOUT) ||
2223 vtpci_with_feature(hw, VIRTIO_F_VERSION_1)) &&
2224 rte_mbuf_refcnt_read(txm) == 1 &&
2225 RTE_MBUF_DIRECT(txm) &&
2226 txm->nb_segs == 1 &&
2227 rte_pktmbuf_headroom(txm) >= hdr_size &&
2228 rte_is_aligned(rte_pktmbuf_mtod(txm, char *),
2229 __alignof__(struct virtio_net_hdr_mrg_rxbuf))) {
2230 inorder_pkts[nb_inorder_pkts] = txm;
2236 if (nb_inorder_pkts) {
2237 need = nb_inorder_pkts - vq->vq_free_cnt;
2238 if (unlikely(need > 0)) {
2239 need = virtio_xmit_try_cleanup_inorder(vq,
2241 if (unlikely(need > 0)) {
2243 "No free tx descriptors to "
2248 virtqueue_enqueue_xmit_inorder(txvq, inorder_pkts,
2250 nb_inorder_pkts = 0;
2253 slots = txm->nb_segs + 1;
2254 need = slots - vq->vq_free_cnt;
2255 if (unlikely(need > 0)) {
2256 need = virtio_xmit_try_cleanup_inorder(vq, slots);
2258 if (unlikely(need > 0)) {
2260 "No free tx descriptors to transmit");
2264 /* Enqueue Packet buffers */
2265 virtqueue_enqueue_xmit(txvq, txm, slots, 0, 0, 1);
2267 virtio_update_packet_stats(&txvq->stats, txm);
2270 /* Transmit all inorder packets */
2271 if (nb_inorder_pkts) {
2272 need = nb_inorder_pkts - vq->vq_free_cnt;
2273 if (unlikely(need > 0)) {
2274 need = virtio_xmit_try_cleanup_inorder(vq,
2276 if (unlikely(need > 0)) {
2278 "No free tx descriptors to transmit");
2279 nb_inorder_pkts = vq->vq_free_cnt;
2284 virtqueue_enqueue_xmit_inorder(txvq, inorder_pkts,
2288 txvq->stats.packets += nb_tx;
2290 if (likely(nb_tx)) {
2291 vq_update_avail_idx(vq);
2293 if (unlikely(virtqueue_kick_prepare(vq))) {
2294 virtqueue_notify(vq);
2295 PMD_TX_LOG(DEBUG, "Notified backend after xmit");