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 virtio_update_packet_stats(struct virtnet_stats *stats, struct rte_mbuf *mbuf)
95 uint32_t s = mbuf->pkt_len;
96 struct rte_ether_addr *ea;
101 stats->size_bins[1]++;
102 } else if (s > 64 && s < 1024) {
105 /* count zeros, and offset into correct bin */
106 bin = (sizeof(s) * 8) - __builtin_clz(s) - 5;
107 stats->size_bins[bin]++;
110 stats->size_bins[0]++;
112 stats->size_bins[6]++;
114 stats->size_bins[7]++;
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))
127 virtio_rx_stats_updated(struct virtnet_rx *rxvq, struct rte_mbuf *m)
129 VIRTIO_DUMP_PACKET(m, m->data_len);
131 virtio_update_packet_stats(&rxvq->stats, m);
135 virtqueue_dequeue_burst_rx_packed(struct virtqueue *vq,
136 struct rte_mbuf **rx_pkts,
140 struct rte_mbuf *cookie;
143 struct vring_packed_desc *desc;
146 desc = vq->vq_packed.ring.desc;
148 for (i = 0; i < num; i++) {
149 used_idx = vq->vq_used_cons_idx;
150 /* desc_is_used has a load-acquire or rte_cio_rmb inside
151 * and wait for used desc in virtqueue.
153 if (!desc_is_used(&desc[used_idx], vq))
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);
163 rte_prefetch0(cookie);
164 rte_packet_prefetch(rte_pktmbuf_mtod(cookie, void *));
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;
179 virtqueue_dequeue_burst_rx(struct virtqueue *vq, struct rte_mbuf **rx_pkts,
180 uint32_t *len, uint16_t num)
182 struct vring_used_elem *uep;
183 struct rte_mbuf *cookie;
184 uint16_t used_idx, desc_idx;
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;
193 cookie = (struct rte_mbuf *)vq->vq_descx[desc_idx].cookie;
195 if (unlikely(cookie == NULL)) {
196 PMD_DRV_LOG(ERR, "vring descriptor with no mbuf cookie at %u",
197 vq->vq_used_cons_idx);
201 rte_prefetch0(cookie);
202 rte_packet_prefetch(rte_pktmbuf_mtod(cookie, void *));
204 vq->vq_used_cons_idx++;
205 vq_ring_free_chain(vq, desc_idx);
206 vq->vq_descx[desc_idx].cookie = NULL;
213 virtqueue_dequeue_rx_inorder(struct virtqueue *vq,
214 struct rte_mbuf **rx_pkts,
218 struct vring_used_elem *uep;
219 struct rte_mbuf *cookie;
220 uint16_t used_idx = 0;
223 if (unlikely(num == 0))
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];
231 cookie = (struct rte_mbuf *)vq->vq_descx[used_idx].cookie;
233 if (unlikely(cookie == NULL)) {
234 PMD_DRV_LOG(ERR, "vring descriptor with no mbuf cookie at %u",
235 vq->vq_used_cons_idx);
239 rte_prefetch0(cookie);
240 rte_packet_prefetch(rte_pktmbuf_mtod(cookie, void *));
242 vq->vq_used_cons_idx++;
243 vq->vq_descx[used_idx].cookie = NULL;
246 vq_ring_free_inorder(vq, used_idx, i);
251 virtqueue_enqueue_refill_inorder(struct virtqueue *vq,
252 struct rte_mbuf **cookies,
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;
260 if (unlikely(vq->vq_free_cnt == 0))
262 if (unlikely(vq->vq_free_cnt < num))
265 head_idx = vq->vq_desc_head_idx & (vq->vq_nentries - 1);
266 start_dp = vq->vq_split.ring.desc;
269 idx = head_idx & (vq->vq_nentries - 1);
270 dxp = &vq->vq_descx[idx];
271 dxp->cookie = (void *)cookies[i];
275 VIRTIO_MBUF_ADDR(cookies[i], vq) +
276 RTE_PKTMBUF_HEADROOM - hw->vtnet_hdr_size;
278 cookies[i]->buf_len -
279 RTE_PKTMBUF_HEADROOM +
281 start_dp[idx].flags = VRING_DESC_F_WRITE;
283 vq_update_avail_ring(vq, idx);
288 vq->vq_desc_head_idx += num;
289 vq->vq_free_cnt = (uint16_t)(vq->vq_free_cnt - num);
294 virtqueue_enqueue_recv_refill(struct virtqueue *vq, struct rte_mbuf **cookie,
297 struct vq_desc_extra *dxp;
298 struct virtio_hw *hw = vq->hw;
299 struct vring_desc *start_dp = vq->vq_split.ring.desc;
302 if (unlikely(vq->vq_free_cnt == 0))
304 if (unlikely(vq->vq_free_cnt < num))
307 if (unlikely(vq->vq_desc_head_idx >= vq->vq_nentries))
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];
317 VIRTIO_MBUF_ADDR(cookie[i], vq) +
318 RTE_PKTMBUF_HEADROOM - hw->vtnet_hdr_size;
320 cookie[i]->buf_len - RTE_PKTMBUF_HEADROOM +
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;
331 vq->vq_free_cnt = (uint16_t)(vq->vq_free_cnt - num);
337 virtqueue_enqueue_recv_refill_packed(struct virtqueue *vq,
338 struct rte_mbuf **cookie, uint16_t num)
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;
347 if (unlikely(vq->vq_free_cnt == 0))
349 if (unlikely(vq->vq_free_cnt < num))
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];
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;
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;
367 virtqueue_store_flags_packed(&start_dp[idx], flags,
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;
377 vq->vq_free_cnt = (uint16_t)(vq->vq_free_cnt - num);
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
386 virtio_tso_fix_cksum(struct rte_mbuf *m)
388 /* common case: header is not fragmented */
389 if (likely(rte_pktmbuf_data_len(m) >= m->l2_len + m->l3_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;
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) -
407 ip6h = (struct rte_ipv6_hdr *)iph;
408 ip_paylen = ip6h->payload_len;
411 /* calculate the new phdr checksum not including ip_paylen */
412 prev_cksum = th->cksum;
415 tmp = (tmp & 0xffff) + (tmp >> 16);
418 /* replace it in the packet */
419 th->cksum = new_cksum;
427 virtqueue_enqueue_xmit_inorder(struct virtnet_tx *txvq,
428 struct rte_mbuf **cookies,
431 struct vq_desc_extra *dxp;
432 struct virtqueue *vq = txvq->vq;
433 struct vring_desc *start_dp;
434 struct virtio_net_hdr *hdr;
436 int16_t head_size = vq->hw->vtnet_hdr_size;
439 idx = vq->vq_desc_head_idx;
440 start_dp = vq->vq_split.ring.desc;
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];
447 virtio_update_packet_stats(&txvq->stats, cookies[i]);
449 hdr = rte_pktmbuf_mtod_offset(cookies[i],
450 struct virtio_net_hdr *, -head_size);
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);
456 virtqueue_xmit_offload(hdr, cookies[i], true);
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;
464 vq_update_avail_ring(vq, idx);
470 vq->vq_free_cnt = (uint16_t)(vq->vq_free_cnt - num);
471 vq->vq_desc_head_idx = idx & (vq->vq_nentries - 1);
475 virtqueue_enqueue_xmit_packed_fast(struct virtnet_tx *txvq,
476 struct rte_mbuf *cookie,
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;
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];
490 dxp = &vq->vq_descx[id];
492 dxp->cookie = cookie;
494 flags = vq->vq_packed.cached_flags;
496 /* prepend cannot fail, checked by caller */
497 hdr = rte_pktmbuf_mtod_offset(cookie, struct virtio_net_hdr *,
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);
504 virtqueue_xmit_offload(hdr, cookie, true);
506 dp->addr = VIRTIO_MBUF_DATA_DMA_ADDR(cookie, vq) - head_size;
507 dp->len = cookie->data_len + head_size;
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;
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;
523 virtqueue_store_flags_packed(dp, flags, vq->hw->weak_barriers);
527 virtqueue_enqueue_xmit(struct virtnet_tx *txvq, struct rte_mbuf *cookie,
528 uint16_t needed, int use_indirect, int can_push,
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;
541 head_idx = vq->vq_desc_head_idx;
544 dxp = &vq->vq_descx[vq->vq_avail_idx & (vq->vq_nentries - 1)];
546 dxp = &vq->vq_descx[idx];
547 dxp->cookie = (void *)cookie;
548 dxp->ndescs = needed;
550 start_dp = vq->vq_split.ring.desc;
553 /* prepend cannot fail, checked by caller */
554 hdr = rte_pktmbuf_mtod_offset(cookie, struct virtio_net_hdr *,
556 prepend_header = true;
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.
565 * the first slot in indirect ring is already preset
566 * to point to the header in reserved region
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;
574 /* loop below will fill in rest of the indirect elements */
575 start_dp = txr[idx].tx_indir;
578 /* setup first tx ring slot to point to header
579 * stored in reserved region.
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;
587 idx = start_dp[idx].next;
590 virtqueue_xmit_offload(hdr, cookie, vq->hw->has_tx_offload);
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;
600 start_dp[idx].flags = cookie->next ? VRING_DESC_F_NEXT : 0;
601 idx = start_dp[idx].next;
602 } while ((cookie = cookie->next) != NULL);
605 idx = vq->vq_split.ring.desc[head_idx].next;
607 vq->vq_free_cnt = (uint16_t)(vq->vq_free_cnt - needed);
609 vq->vq_desc_head_idx = idx;
610 vq_update_avail_ring(vq, head_idx);
613 if (vq->vq_desc_head_idx == VQ_RING_DESC_CHAIN_END)
614 vq->vq_desc_tail_idx = idx;
619 virtio_dev_cq_start(struct rte_eth_dev *dev)
621 struct virtio_hw *hw = dev->data->dev_private;
623 if (hw->cvq && hw->cvq->vq) {
624 rte_spinlock_init(&hw->cvq->lock);
625 VIRTQUEUE_DUMP((struct virtqueue *)hw->cvq->vq);
630 virtio_dev_rx_queue_setup(struct rte_eth_dev *dev,
633 unsigned int socket_id __rte_unused,
634 const struct rte_eth_rxconf *rx_conf,
635 struct rte_mempool *mp)
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;
643 PMD_INIT_FUNC_TRACE();
645 if (rx_conf->rx_deferred_start) {
646 PMD_INIT_LOG(ERR, "Rx deferred start is not supported");
650 rx_free_thresh = rx_conf->rx_free_thresh;
651 if (rx_free_thresh == 0)
653 RTE_MIN(vq->vq_nentries / 4, DEFAULT_RX_FREE_THRESH);
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);
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",
667 rx_free_thresh, dev->data->port_id, queue_idx);
670 vq->vq_free_thresh = rx_free_thresh;
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);
677 rxvq->queue_id = queue_idx;
679 dev->data->rx_queues[queue_idx] = rxvq;
685 virtio_dev_rx_queue_setup_finish(struct rte_eth_dev *dev, uint16_t queue_idx)
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;
694 bool in_order = vtpci_with_feature(hw, VIRTIO_F_IN_ORDER);
696 PMD_INIT_FUNC_TRACE();
698 /* Allocate blank mbufs for the each rx descriptor */
701 if (hw->use_vec_rx && !vtpci_packed_queue(hw)) {
702 for (desc_idx = 0; desc_idx < vq->vq_nentries;
704 vq->vq_split.ring.avail->ring[desc_idx] = desc_idx;
705 vq->vq_split.ring.desc[desc_idx].flags =
709 virtio_rxq_vec_setup(rxvq);
712 memset(&rxvq->fake_mbuf, 0, sizeof(rxvq->fake_mbuf));
713 for (desc_idx = 0; desc_idx < RTE_PMD_VIRTIO_RX_MAX_BURST;
715 vq->sw_ring[vq->vq_nentries + desc_idx] =
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;
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];
729 if (!rte_pktmbuf_alloc_bulk(rxvq->mpool, pkts,
731 error = virtqueue_enqueue_refill_inorder(vq,
734 if (unlikely(error)) {
735 for (i = 0; i < free_cnt; i++)
736 rte_pktmbuf_free(pkts[i]);
741 vq_update_avail_idx(vq);
744 while (!virtqueue_full(vq)) {
745 m = rte_mbuf_raw_alloc(rxvq->mpool);
749 /* Enqueue allocated buffers */
750 if (vtpci_packed_queue(vq->hw))
751 error = virtqueue_enqueue_recv_refill_packed(vq,
754 error = virtqueue_enqueue_recv_refill(vq,
763 if (!vtpci_packed_queue(vq->hw))
764 vq_update_avail_idx(vq);
767 PMD_INIT_LOG(DEBUG, "Allocated %d bufs", nbufs);
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
782 virtio_dev_tx_queue_setup(struct rte_eth_dev *dev,
785 unsigned int socket_id __rte_unused,
786 const struct rte_eth_txconf *tx_conf)
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;
794 PMD_INIT_FUNC_TRACE();
796 if (tx_conf->tx_deferred_start) {
797 PMD_INIT_LOG(ERR, "Tx deferred start is not supported");
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);
806 txvq->queue_id = queue_idx;
808 tx_free_thresh = tx_conf->tx_free_thresh;
809 if (tx_free_thresh == 0)
811 RTE_MIN(vq->vq_nentries / 4, DEFAULT_TX_FREE_THRESH);
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",
818 tx_free_thresh, dev->data->port_id, queue_idx);
822 vq->vq_free_thresh = tx_free_thresh;
824 dev->data->tx_queues[queue_idx] = txvq;
829 virtio_dev_tx_queue_setup_finish(struct rte_eth_dev *dev,
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];
836 PMD_INIT_FUNC_TRACE();
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;
849 virtio_discard_rxbuf(struct virtqueue *vq, struct rte_mbuf *m)
853 * Requeue the discarded mbuf. This should always be
854 * successful since it was just dequeued.
856 if (vtpci_packed_queue(vq->hw))
857 error = virtqueue_enqueue_recv_refill_packed(vq, &m, 1);
859 error = virtqueue_enqueue_recv_refill(vq, &m, 1);
861 if (unlikely(error)) {
862 PMD_DRV_LOG(ERR, "cannot requeue discarded mbuf");
868 virtio_discard_rxbuf_inorder(struct virtqueue *vq, struct rte_mbuf *m)
872 error = virtqueue_enqueue_refill_inorder(vq, &m, 1);
873 if (unlikely(error)) {
874 PMD_DRV_LOG(ERR, "cannot requeue discarded mbuf");
879 /* Optionally fill offload information in structure */
881 virtio_rx_offload(struct rte_mbuf *m, struct virtio_net_hdr *hdr)
883 struct rte_net_hdr_lens hdr_lens;
884 uint32_t hdrlen, ptype;
885 int l4_supported = 0;
888 if (hdr->flags == 0 && hdr->gso_type == VIRTIO_NET_HDR_GSO_NONE)
891 m->ol_flags |= PKT_RX_IP_CKSUM_UNKNOWN;
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)
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;
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.
911 uint16_t csum = 0, off;
913 rte_raw_cksum_mbuf(m, hdr->csum_start,
914 rte_pktmbuf_pkt_len(m) - hdr->csum_start,
916 if (likely(csum != 0xffff))
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 *,
923 } else if (hdr->flags & VIRTIO_NET_HDR_F_DATA_VALID && l4_supported) {
924 m->ol_flags |= PKT_RX_L4_CKSUM_GOOD;
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)) {
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;
951 #define DESC_PER_CACHELINE (RTE_CACHE_LINE_SIZE / sizeof(struct vring_desc))
953 virtio_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts, uint16_t nb_pkts)
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];
963 uint32_t i, nb_enqueued;
965 struct virtio_net_hdr *hdr;
968 if (unlikely(hw->started == 0))
971 nb_used = VIRTQUEUE_NUSED(vq);
973 virtio_rmb(hw->weak_barriers);
975 num = likely(nb_used <= nb_pkts) ? nb_used : nb_pkts;
976 if (unlikely(num > VIRTIO_MBUF_BURST_SZ))
977 num = VIRTIO_MBUF_BURST_SZ;
978 if (likely(num > DESC_PER_CACHELINE))
979 num = num - ((vq->vq_used_cons_idx + num) % DESC_PER_CACHELINE);
981 num = virtqueue_dequeue_burst_rx(vq, rcv_pkts, len, num);
982 PMD_RX_LOG(DEBUG, "used:%d dequeue:%d", nb_used, num);
985 hdr_size = hw->vtnet_hdr_size;
987 for (i = 0; i < num ; i++) {
990 PMD_RX_LOG(DEBUG, "packet len:%d", len[i]);
992 if (unlikely(len[i] < hdr_size + RTE_ETHER_HDR_LEN)) {
993 PMD_RX_LOG(ERR, "Packet drop");
995 virtio_discard_rxbuf(vq, rxm);
996 rxvq->stats.errors++;
1000 rxm->port = rxvq->port_id;
1001 rxm->data_off = RTE_PKTMBUF_HEADROOM;
1005 rxm->pkt_len = (uint32_t)(len[i] - hdr_size);
1006 rxm->data_len = (uint16_t)(len[i] - hdr_size);
1008 hdr = (struct virtio_net_hdr *)((char *)rxm->buf_addr +
1009 RTE_PKTMBUF_HEADROOM - hdr_size);
1012 rte_vlan_strip(rxm);
1014 if (hw->has_rx_offload && virtio_rx_offload(rxm, hdr) < 0) {
1015 virtio_discard_rxbuf(vq, rxm);
1016 rxvq->stats.errors++;
1020 virtio_rx_stats_updated(rxvq, rxm);
1022 rx_pkts[nb_rx++] = rxm;
1025 rxvq->stats.packets += nb_rx;
1027 /* Allocate new mbuf for the used descriptor */
1028 if (likely(!virtqueue_full(vq))) {
1029 uint16_t free_cnt = vq->vq_free_cnt;
1030 struct rte_mbuf *new_pkts[free_cnt];
1032 if (likely(rte_pktmbuf_alloc_bulk(rxvq->mpool, new_pkts,
1034 error = virtqueue_enqueue_recv_refill(vq, new_pkts,
1036 if (unlikely(error)) {
1037 for (i = 0; i < free_cnt; i++)
1038 rte_pktmbuf_free(new_pkts[i]);
1040 nb_enqueued += free_cnt;
1042 struct rte_eth_dev *dev =
1043 &rte_eth_devices[rxvq->port_id];
1044 dev->data->rx_mbuf_alloc_failed += free_cnt;
1048 if (likely(nb_enqueued)) {
1049 vq_update_avail_idx(vq);
1051 if (unlikely(virtqueue_kick_prepare(vq))) {
1052 virtqueue_notify(vq);
1053 PMD_RX_LOG(DEBUG, "Notified");
1061 virtio_recv_pkts_packed(void *rx_queue, struct rte_mbuf **rx_pkts,
1064 struct virtnet_rx *rxvq = rx_queue;
1065 struct virtqueue *vq = rxvq->vq;
1066 struct virtio_hw *hw = vq->hw;
1067 struct rte_mbuf *rxm;
1068 uint16_t num, nb_rx;
1069 uint32_t len[VIRTIO_MBUF_BURST_SZ];
1070 struct rte_mbuf *rcv_pkts[VIRTIO_MBUF_BURST_SZ];
1072 uint32_t i, nb_enqueued;
1074 struct virtio_net_hdr *hdr;
1077 if (unlikely(hw->started == 0))
1080 num = RTE_MIN(VIRTIO_MBUF_BURST_SZ, nb_pkts);
1081 if (likely(num > DESC_PER_CACHELINE))
1082 num = num - ((vq->vq_used_cons_idx + num) % DESC_PER_CACHELINE);
1084 num = virtqueue_dequeue_burst_rx_packed(vq, rcv_pkts, len, num);
1085 PMD_RX_LOG(DEBUG, "dequeue:%d", num);
1088 hdr_size = hw->vtnet_hdr_size;
1090 for (i = 0; i < num; i++) {
1093 PMD_RX_LOG(DEBUG, "packet len:%d", len[i]);
1095 if (unlikely(len[i] < hdr_size + RTE_ETHER_HDR_LEN)) {
1096 PMD_RX_LOG(ERR, "Packet drop");
1098 virtio_discard_rxbuf(vq, rxm);
1099 rxvq->stats.errors++;
1103 rxm->port = rxvq->port_id;
1104 rxm->data_off = RTE_PKTMBUF_HEADROOM;
1108 rxm->pkt_len = (uint32_t)(len[i] - hdr_size);
1109 rxm->data_len = (uint16_t)(len[i] - hdr_size);
1111 hdr = (struct virtio_net_hdr *)((char *)rxm->buf_addr +
1112 RTE_PKTMBUF_HEADROOM - hdr_size);
1115 rte_vlan_strip(rxm);
1117 if (hw->has_rx_offload && virtio_rx_offload(rxm, hdr) < 0) {
1118 virtio_discard_rxbuf(vq, rxm);
1119 rxvq->stats.errors++;
1123 virtio_rx_stats_updated(rxvq, rxm);
1125 rx_pkts[nb_rx++] = rxm;
1128 rxvq->stats.packets += nb_rx;
1130 /* Allocate new mbuf for the used descriptor */
1131 if (likely(!virtqueue_full(vq))) {
1132 uint16_t free_cnt = vq->vq_free_cnt;
1133 struct rte_mbuf *new_pkts[free_cnt];
1135 if (likely(rte_pktmbuf_alloc_bulk(rxvq->mpool, new_pkts,
1137 error = virtqueue_enqueue_recv_refill_packed(vq,
1138 new_pkts, free_cnt);
1139 if (unlikely(error)) {
1140 for (i = 0; i < free_cnt; i++)
1141 rte_pktmbuf_free(new_pkts[i]);
1143 nb_enqueued += free_cnt;
1145 struct rte_eth_dev *dev =
1146 &rte_eth_devices[rxvq->port_id];
1147 dev->data->rx_mbuf_alloc_failed += free_cnt;
1151 if (likely(nb_enqueued)) {
1152 if (unlikely(virtqueue_kick_prepare_packed(vq))) {
1153 virtqueue_notify(vq);
1154 PMD_RX_LOG(DEBUG, "Notified");
1163 virtio_recv_pkts_inorder(void *rx_queue,
1164 struct rte_mbuf **rx_pkts,
1167 struct virtnet_rx *rxvq = rx_queue;
1168 struct virtqueue *vq = rxvq->vq;
1169 struct virtio_hw *hw = vq->hw;
1170 struct rte_mbuf *rxm;
1171 struct rte_mbuf *prev = NULL;
1172 uint16_t nb_used, num, nb_rx;
1173 uint32_t len[VIRTIO_MBUF_BURST_SZ];
1174 struct rte_mbuf *rcv_pkts[VIRTIO_MBUF_BURST_SZ];
1176 uint32_t nb_enqueued;
1183 if (unlikely(hw->started == 0))
1186 nb_used = VIRTQUEUE_NUSED(vq);
1187 nb_used = RTE_MIN(nb_used, nb_pkts);
1188 nb_used = RTE_MIN(nb_used, VIRTIO_MBUF_BURST_SZ);
1190 virtio_rmb(hw->weak_barriers);
1192 PMD_RX_LOG(DEBUG, "used:%d", nb_used);
1197 hdr_size = hw->vtnet_hdr_size;
1199 num = virtqueue_dequeue_rx_inorder(vq, rcv_pkts, len, nb_used);
1201 for (i = 0; i < num; i++) {
1202 struct virtio_net_hdr_mrg_rxbuf *header;
1204 PMD_RX_LOG(DEBUG, "dequeue:%d", num);
1205 PMD_RX_LOG(DEBUG, "packet len:%d", len[i]);
1209 if (unlikely(len[i] < hdr_size + RTE_ETHER_HDR_LEN)) {
1210 PMD_RX_LOG(ERR, "Packet drop");
1212 virtio_discard_rxbuf_inorder(vq, rxm);
1213 rxvq->stats.errors++;
1217 header = (struct virtio_net_hdr_mrg_rxbuf *)
1218 ((char *)rxm->buf_addr + RTE_PKTMBUF_HEADROOM
1221 if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF)) {
1222 seg_num = header->num_buffers;
1229 rxm->data_off = RTE_PKTMBUF_HEADROOM;
1230 rxm->nb_segs = seg_num;
1233 rxm->pkt_len = (uint32_t)(len[i] - hdr_size);
1234 rxm->data_len = (uint16_t)(len[i] - hdr_size);
1236 rxm->port = rxvq->port_id;
1238 rx_pkts[nb_rx] = rxm;
1241 if (vq->hw->has_rx_offload &&
1242 virtio_rx_offload(rxm, &header->hdr) < 0) {
1243 virtio_discard_rxbuf_inorder(vq, rxm);
1244 rxvq->stats.errors++;
1249 rte_vlan_strip(rx_pkts[nb_rx]);
1251 seg_res = seg_num - 1;
1253 /* Merge remaining segments */
1254 while (seg_res != 0 && i < (num - 1)) {
1258 rxm->data_off = RTE_PKTMBUF_HEADROOM - hdr_size;
1259 rxm->pkt_len = (uint32_t)(len[i]);
1260 rxm->data_len = (uint16_t)(len[i]);
1262 rx_pkts[nb_rx]->pkt_len += (uint32_t)(len[i]);
1270 virtio_rx_stats_updated(rxvq, rx_pkts[nb_rx]);
1275 /* Last packet still need merge segments */
1276 while (seg_res != 0) {
1277 uint16_t rcv_cnt = RTE_MIN((uint16_t)seg_res,
1278 VIRTIO_MBUF_BURST_SZ);
1280 if (likely(VIRTQUEUE_NUSED(vq) >= rcv_cnt)) {
1281 virtio_rmb(hw->weak_barriers);
1282 num = virtqueue_dequeue_rx_inorder(vq, rcv_pkts, len,
1284 uint16_t extra_idx = 0;
1287 while (extra_idx < rcv_cnt) {
1288 rxm = rcv_pkts[extra_idx];
1290 RTE_PKTMBUF_HEADROOM - hdr_size;
1291 rxm->pkt_len = (uint32_t)(len[extra_idx]);
1292 rxm->data_len = (uint16_t)(len[extra_idx]);
1295 rx_pkts[nb_rx]->pkt_len += len[extra_idx];
1301 virtio_rx_stats_updated(rxvq, rx_pkts[nb_rx]);
1306 "No enough segments for packet.");
1307 rte_pktmbuf_free(rx_pkts[nb_rx]);
1308 rxvq->stats.errors++;
1313 rxvq->stats.packets += nb_rx;
1315 /* Allocate new mbuf for the used descriptor */
1317 if (likely(!virtqueue_full(vq))) {
1318 /* free_cnt may include mrg descs */
1319 uint16_t free_cnt = vq->vq_free_cnt;
1320 struct rte_mbuf *new_pkts[free_cnt];
1322 if (!rte_pktmbuf_alloc_bulk(rxvq->mpool, new_pkts, free_cnt)) {
1323 error = virtqueue_enqueue_refill_inorder(vq, new_pkts,
1325 if (unlikely(error)) {
1326 for (i = 0; i < free_cnt; i++)
1327 rte_pktmbuf_free(new_pkts[i]);
1329 nb_enqueued += free_cnt;
1331 struct rte_eth_dev *dev =
1332 &rte_eth_devices[rxvq->port_id];
1333 dev->data->rx_mbuf_alloc_failed += free_cnt;
1337 if (likely(nb_enqueued)) {
1338 vq_update_avail_idx(vq);
1340 if (unlikely(virtqueue_kick_prepare(vq))) {
1341 virtqueue_notify(vq);
1342 PMD_RX_LOG(DEBUG, "Notified");
1350 virtio_recv_mergeable_pkts(void *rx_queue,
1351 struct rte_mbuf **rx_pkts,
1354 struct virtnet_rx *rxvq = rx_queue;
1355 struct virtqueue *vq = rxvq->vq;
1356 struct virtio_hw *hw = vq->hw;
1357 struct rte_mbuf *rxm;
1358 struct rte_mbuf *prev = NULL;
1359 uint16_t nb_used, num, nb_rx = 0;
1360 uint32_t len[VIRTIO_MBUF_BURST_SZ];
1361 struct rte_mbuf *rcv_pkts[VIRTIO_MBUF_BURST_SZ];
1363 uint32_t nb_enqueued = 0;
1364 uint32_t seg_num = 0;
1365 uint32_t seg_res = 0;
1366 uint32_t hdr_size = hw->vtnet_hdr_size;
1369 if (unlikely(hw->started == 0))
1372 nb_used = VIRTQUEUE_NUSED(vq);
1374 virtio_rmb(hw->weak_barriers);
1376 PMD_RX_LOG(DEBUG, "used:%d", nb_used);
1378 num = likely(nb_used <= nb_pkts) ? nb_used : nb_pkts;
1379 if (unlikely(num > VIRTIO_MBUF_BURST_SZ))
1380 num = VIRTIO_MBUF_BURST_SZ;
1381 if (likely(num > DESC_PER_CACHELINE))
1382 num = num - ((vq->vq_used_cons_idx + num) %
1383 DESC_PER_CACHELINE);
1386 num = virtqueue_dequeue_burst_rx(vq, rcv_pkts, len, num);
1388 for (i = 0; i < num; i++) {
1389 struct virtio_net_hdr_mrg_rxbuf *header;
1391 PMD_RX_LOG(DEBUG, "dequeue:%d", num);
1392 PMD_RX_LOG(DEBUG, "packet len:%d", len[i]);
1396 if (unlikely(len[i] < hdr_size + RTE_ETHER_HDR_LEN)) {
1397 PMD_RX_LOG(ERR, "Packet drop");
1399 virtio_discard_rxbuf(vq, rxm);
1400 rxvq->stats.errors++;
1404 header = (struct virtio_net_hdr_mrg_rxbuf *)
1405 ((char *)rxm->buf_addr + RTE_PKTMBUF_HEADROOM
1407 seg_num = header->num_buffers;
1411 rxm->data_off = RTE_PKTMBUF_HEADROOM;
1412 rxm->nb_segs = seg_num;
1415 rxm->pkt_len = (uint32_t)(len[i] - hdr_size);
1416 rxm->data_len = (uint16_t)(len[i] - hdr_size);
1418 rxm->port = rxvq->port_id;
1420 rx_pkts[nb_rx] = rxm;
1423 if (hw->has_rx_offload &&
1424 virtio_rx_offload(rxm, &header->hdr) < 0) {
1425 virtio_discard_rxbuf(vq, rxm);
1426 rxvq->stats.errors++;
1431 rte_vlan_strip(rx_pkts[nb_rx]);
1433 seg_res = seg_num - 1;
1435 /* Merge remaining segments */
1436 while (seg_res != 0 && i < (num - 1)) {
1440 rxm->data_off = RTE_PKTMBUF_HEADROOM - hdr_size;
1441 rxm->pkt_len = (uint32_t)(len[i]);
1442 rxm->data_len = (uint16_t)(len[i]);
1444 rx_pkts[nb_rx]->pkt_len += (uint32_t)(len[i]);
1452 virtio_rx_stats_updated(rxvq, rx_pkts[nb_rx]);
1457 /* Last packet still need merge segments */
1458 while (seg_res != 0) {
1459 uint16_t rcv_cnt = RTE_MIN((uint16_t)seg_res,
1460 VIRTIO_MBUF_BURST_SZ);
1462 if (likely(VIRTQUEUE_NUSED(vq) >= rcv_cnt)) {
1463 virtio_rmb(hw->weak_barriers);
1464 num = virtqueue_dequeue_burst_rx(vq, rcv_pkts, len,
1466 uint16_t extra_idx = 0;
1469 while (extra_idx < rcv_cnt) {
1470 rxm = rcv_pkts[extra_idx];
1472 RTE_PKTMBUF_HEADROOM - hdr_size;
1473 rxm->pkt_len = (uint32_t)(len[extra_idx]);
1474 rxm->data_len = (uint16_t)(len[extra_idx]);
1477 rx_pkts[nb_rx]->pkt_len += len[extra_idx];
1483 virtio_rx_stats_updated(rxvq, rx_pkts[nb_rx]);
1488 "No enough segments for packet.");
1489 rte_pktmbuf_free(rx_pkts[nb_rx]);
1490 rxvq->stats.errors++;
1495 rxvq->stats.packets += nb_rx;
1497 /* Allocate new mbuf for the used descriptor */
1498 if (likely(!virtqueue_full(vq))) {
1499 /* free_cnt may include mrg descs */
1500 uint16_t free_cnt = vq->vq_free_cnt;
1501 struct rte_mbuf *new_pkts[free_cnt];
1503 if (!rte_pktmbuf_alloc_bulk(rxvq->mpool, new_pkts, free_cnt)) {
1504 error = virtqueue_enqueue_recv_refill(vq, new_pkts,
1506 if (unlikely(error)) {
1507 for (i = 0; i < free_cnt; i++)
1508 rte_pktmbuf_free(new_pkts[i]);
1510 nb_enqueued += free_cnt;
1512 struct rte_eth_dev *dev =
1513 &rte_eth_devices[rxvq->port_id];
1514 dev->data->rx_mbuf_alloc_failed += free_cnt;
1518 if (likely(nb_enqueued)) {
1519 vq_update_avail_idx(vq);
1521 if (unlikely(virtqueue_kick_prepare(vq))) {
1522 virtqueue_notify(vq);
1523 PMD_RX_LOG(DEBUG, "Notified");
1531 virtio_recv_mergeable_pkts_packed(void *rx_queue,
1532 struct rte_mbuf **rx_pkts,
1535 struct virtnet_rx *rxvq = rx_queue;
1536 struct virtqueue *vq = rxvq->vq;
1537 struct virtio_hw *hw = vq->hw;
1538 struct rte_mbuf *rxm;
1539 struct rte_mbuf *prev = NULL;
1540 uint16_t num, nb_rx = 0;
1541 uint32_t len[VIRTIO_MBUF_BURST_SZ];
1542 struct rte_mbuf *rcv_pkts[VIRTIO_MBUF_BURST_SZ];
1543 uint32_t nb_enqueued = 0;
1544 uint32_t seg_num = 0;
1545 uint32_t seg_res = 0;
1546 uint32_t hdr_size = hw->vtnet_hdr_size;
1550 if (unlikely(hw->started == 0))
1555 if (unlikely(num > VIRTIO_MBUF_BURST_SZ))
1556 num = VIRTIO_MBUF_BURST_SZ;
1557 if (likely(num > DESC_PER_CACHELINE))
1558 num = num - ((vq->vq_used_cons_idx + num) % DESC_PER_CACHELINE);
1560 num = virtqueue_dequeue_burst_rx_packed(vq, rcv_pkts, len, num);
1562 for (i = 0; i < num; i++) {
1563 struct virtio_net_hdr_mrg_rxbuf *header;
1565 PMD_RX_LOG(DEBUG, "dequeue:%d", num);
1566 PMD_RX_LOG(DEBUG, "packet len:%d", len[i]);
1570 if (unlikely(len[i] < hdr_size + RTE_ETHER_HDR_LEN)) {
1571 PMD_RX_LOG(ERR, "Packet drop");
1573 virtio_discard_rxbuf(vq, rxm);
1574 rxvq->stats.errors++;
1578 header = (struct virtio_net_hdr_mrg_rxbuf *)((char *)
1579 rxm->buf_addr + RTE_PKTMBUF_HEADROOM - hdr_size);
1580 seg_num = header->num_buffers;
1585 rxm->data_off = RTE_PKTMBUF_HEADROOM;
1586 rxm->nb_segs = seg_num;
1589 rxm->pkt_len = (uint32_t)(len[i] - hdr_size);
1590 rxm->data_len = (uint16_t)(len[i] - hdr_size);
1592 rxm->port = rxvq->port_id;
1593 rx_pkts[nb_rx] = rxm;
1596 if (hw->has_rx_offload &&
1597 virtio_rx_offload(rxm, &header->hdr) < 0) {
1598 virtio_discard_rxbuf(vq, rxm);
1599 rxvq->stats.errors++;
1604 rte_vlan_strip(rx_pkts[nb_rx]);
1606 seg_res = seg_num - 1;
1608 /* Merge remaining segments */
1609 while (seg_res != 0 && i < (num - 1)) {
1613 rxm->data_off = RTE_PKTMBUF_HEADROOM - hdr_size;
1614 rxm->pkt_len = (uint32_t)(len[i]);
1615 rxm->data_len = (uint16_t)(len[i]);
1617 rx_pkts[nb_rx]->pkt_len += (uint32_t)(len[i]);
1625 virtio_rx_stats_updated(rxvq, rx_pkts[nb_rx]);
1630 /* Last packet still need merge segments */
1631 while (seg_res != 0) {
1632 uint16_t rcv_cnt = RTE_MIN((uint16_t)seg_res,
1633 VIRTIO_MBUF_BURST_SZ);
1634 uint16_t extra_idx = 0;
1636 rcv_cnt = virtqueue_dequeue_burst_rx_packed(vq, rcv_pkts,
1638 if (unlikely(rcv_cnt == 0)) {
1639 PMD_RX_LOG(ERR, "No enough segments for packet.");
1640 rte_pktmbuf_free(rx_pkts[nb_rx]);
1641 rxvq->stats.errors++;
1645 while (extra_idx < rcv_cnt) {
1646 rxm = rcv_pkts[extra_idx];
1648 rxm->data_off = RTE_PKTMBUF_HEADROOM - hdr_size;
1649 rxm->pkt_len = (uint32_t)(len[extra_idx]);
1650 rxm->data_len = (uint16_t)(len[extra_idx]);
1654 rx_pkts[nb_rx]->pkt_len += len[extra_idx];
1659 virtio_rx_stats_updated(rxvq, rx_pkts[nb_rx]);
1664 rxvq->stats.packets += nb_rx;
1666 /* Allocate new mbuf for the used descriptor */
1667 if (likely(!virtqueue_full(vq))) {
1668 /* free_cnt may include mrg descs */
1669 uint16_t free_cnt = vq->vq_free_cnt;
1670 struct rte_mbuf *new_pkts[free_cnt];
1672 if (!rte_pktmbuf_alloc_bulk(rxvq->mpool, new_pkts, free_cnt)) {
1673 error = virtqueue_enqueue_recv_refill_packed(vq,
1674 new_pkts, free_cnt);
1675 if (unlikely(error)) {
1676 for (i = 0; i < free_cnt; i++)
1677 rte_pktmbuf_free(new_pkts[i]);
1679 nb_enqueued += free_cnt;
1681 struct rte_eth_dev *dev =
1682 &rte_eth_devices[rxvq->port_id];
1683 dev->data->rx_mbuf_alloc_failed += free_cnt;
1687 if (likely(nb_enqueued)) {
1688 if (unlikely(virtqueue_kick_prepare_packed(vq))) {
1689 virtqueue_notify(vq);
1690 PMD_RX_LOG(DEBUG, "Notified");
1698 virtio_xmit_pkts_prepare(void *tx_queue __rte_unused, struct rte_mbuf **tx_pkts,
1704 for (nb_tx = 0; nb_tx < nb_pkts; nb_tx++) {
1705 struct rte_mbuf *m = tx_pkts[nb_tx];
1707 #ifdef RTE_LIBRTE_ETHDEV_DEBUG
1708 error = rte_validate_tx_offload(m);
1709 if (unlikely(error)) {
1715 /* Do VLAN tag insertion */
1716 if (unlikely(m->ol_flags & PKT_TX_VLAN_PKT)) {
1717 error = rte_vlan_insert(&m);
1718 /* rte_vlan_insert() may change pointer
1719 * even in the case of failure
1723 if (unlikely(error)) {
1729 error = rte_net_intel_cksum_prepare(m);
1730 if (unlikely(error)) {
1735 if (m->ol_flags & PKT_TX_TCP_SEG)
1736 virtio_tso_fix_cksum(m);
1743 virtio_xmit_pkts_packed(void *tx_queue, struct rte_mbuf **tx_pkts,
1746 struct virtnet_tx *txvq = tx_queue;
1747 struct virtqueue *vq = txvq->vq;
1748 struct virtio_hw *hw = vq->hw;
1749 uint16_t hdr_size = hw->vtnet_hdr_size;
1751 bool in_order = vtpci_with_feature(hw, VIRTIO_F_IN_ORDER);
1753 if (unlikely(hw->started == 0 && tx_pkts != hw->inject_pkts))
1756 if (unlikely(nb_pkts < 1))
1759 PMD_TX_LOG(DEBUG, "%d packets to xmit", nb_pkts);
1761 if (nb_pkts > vq->vq_free_cnt)
1762 virtio_xmit_cleanup_packed(vq, nb_pkts - vq->vq_free_cnt,
1765 for (nb_tx = 0; nb_tx < nb_pkts; nb_tx++) {
1766 struct rte_mbuf *txm = tx_pkts[nb_tx];
1767 int can_push = 0, slots, need;
1769 /* optimize ring usage */
1770 if ((vtpci_with_feature(hw, VIRTIO_F_ANY_LAYOUT) ||
1771 vtpci_with_feature(hw, VIRTIO_F_VERSION_1)) &&
1772 rte_mbuf_refcnt_read(txm) == 1 &&
1773 RTE_MBUF_DIRECT(txm) &&
1774 txm->nb_segs == 1 &&
1775 rte_pktmbuf_headroom(txm) >= hdr_size &&
1776 rte_is_aligned(rte_pktmbuf_mtod(txm, char *),
1777 __alignof__(struct virtio_net_hdr_mrg_rxbuf)))
1780 /* How many main ring entries are needed to this Tx?
1781 * any_layout => number of segments
1782 * default => number of segments + 1
1784 slots = txm->nb_segs + !can_push;
1785 need = slots - vq->vq_free_cnt;
1787 /* Positive value indicates it need free vring descriptors */
1788 if (unlikely(need > 0)) {
1789 virtio_xmit_cleanup_packed(vq, need, in_order);
1790 need = slots - vq->vq_free_cnt;
1791 if (unlikely(need > 0)) {
1793 "No free tx descriptors to transmit");
1798 /* Enqueue Packet buffers */
1800 virtqueue_enqueue_xmit_packed_fast(txvq, txm, in_order);
1802 virtqueue_enqueue_xmit_packed(txvq, txm, slots, 0,
1805 virtio_update_packet_stats(&txvq->stats, txm);
1808 txvq->stats.packets += nb_tx;
1810 if (likely(nb_tx)) {
1811 if (unlikely(virtqueue_kick_prepare_packed(vq))) {
1812 virtqueue_notify(vq);
1813 PMD_TX_LOG(DEBUG, "Notified backend after xmit");
1821 virtio_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts, uint16_t nb_pkts)
1823 struct virtnet_tx *txvq = tx_queue;
1824 struct virtqueue *vq = txvq->vq;
1825 struct virtio_hw *hw = vq->hw;
1826 uint16_t hdr_size = hw->vtnet_hdr_size;
1827 uint16_t nb_used, nb_tx = 0;
1829 if (unlikely(hw->started == 0 && tx_pkts != hw->inject_pkts))
1832 if (unlikely(nb_pkts < 1))
1835 PMD_TX_LOG(DEBUG, "%d packets to xmit", nb_pkts);
1836 nb_used = VIRTQUEUE_NUSED(vq);
1838 virtio_rmb(hw->weak_barriers);
1839 if (likely(nb_used > vq->vq_nentries - vq->vq_free_thresh))
1840 virtio_xmit_cleanup(vq, nb_used);
1842 for (nb_tx = 0; nb_tx < nb_pkts; nb_tx++) {
1843 struct rte_mbuf *txm = tx_pkts[nb_tx];
1844 int can_push = 0, use_indirect = 0, slots, need;
1846 /* optimize ring usage */
1847 if ((vtpci_with_feature(hw, VIRTIO_F_ANY_LAYOUT) ||
1848 vtpci_with_feature(hw, VIRTIO_F_VERSION_1)) &&
1849 rte_mbuf_refcnt_read(txm) == 1 &&
1850 RTE_MBUF_DIRECT(txm) &&
1851 txm->nb_segs == 1 &&
1852 rte_pktmbuf_headroom(txm) >= hdr_size &&
1853 rte_is_aligned(rte_pktmbuf_mtod(txm, char *),
1854 __alignof__(struct virtio_net_hdr_mrg_rxbuf)))
1856 else if (vtpci_with_feature(hw, VIRTIO_RING_F_INDIRECT_DESC) &&
1857 txm->nb_segs < VIRTIO_MAX_TX_INDIRECT)
1860 /* How many main ring entries are needed to this Tx?
1861 * any_layout => number of segments
1863 * default => number of segments + 1
1865 slots = use_indirect ? 1 : (txm->nb_segs + !can_push);
1866 need = slots - vq->vq_free_cnt;
1868 /* Positive value indicates it need free vring descriptors */
1869 if (unlikely(need > 0)) {
1870 nb_used = VIRTQUEUE_NUSED(vq);
1871 virtio_rmb(hw->weak_barriers);
1872 need = RTE_MIN(need, (int)nb_used);
1874 virtio_xmit_cleanup(vq, need);
1875 need = slots - vq->vq_free_cnt;
1876 if (unlikely(need > 0)) {
1878 "No free tx descriptors to transmit");
1883 /* Enqueue Packet buffers */
1884 virtqueue_enqueue_xmit(txvq, txm, slots, use_indirect,
1887 virtio_update_packet_stats(&txvq->stats, txm);
1890 txvq->stats.packets += nb_tx;
1892 if (likely(nb_tx)) {
1893 vq_update_avail_idx(vq);
1895 if (unlikely(virtqueue_kick_prepare(vq))) {
1896 virtqueue_notify(vq);
1897 PMD_TX_LOG(DEBUG, "Notified backend after xmit");
1904 static __rte_always_inline int
1905 virtio_xmit_try_cleanup_inorder(struct virtqueue *vq, uint16_t need)
1907 uint16_t nb_used, nb_clean, nb_descs;
1908 struct virtio_hw *hw = vq->hw;
1910 nb_descs = vq->vq_free_cnt + need;
1911 nb_used = VIRTQUEUE_NUSED(vq);
1912 virtio_rmb(hw->weak_barriers);
1913 nb_clean = RTE_MIN(need, (int)nb_used);
1915 virtio_xmit_cleanup_inorder(vq, nb_clean);
1917 return nb_descs - vq->vq_free_cnt;
1921 virtio_xmit_pkts_inorder(void *tx_queue,
1922 struct rte_mbuf **tx_pkts,
1925 struct virtnet_tx *txvq = tx_queue;
1926 struct virtqueue *vq = txvq->vq;
1927 struct virtio_hw *hw = vq->hw;
1928 uint16_t hdr_size = hw->vtnet_hdr_size;
1929 uint16_t nb_used, nb_tx = 0, nb_inorder_pkts = 0;
1930 struct rte_mbuf *inorder_pkts[nb_pkts];
1933 if (unlikely(hw->started == 0 && tx_pkts != hw->inject_pkts))
1936 if (unlikely(nb_pkts < 1))
1940 PMD_TX_LOG(DEBUG, "%d packets to xmit", nb_pkts);
1941 nb_used = VIRTQUEUE_NUSED(vq);
1943 virtio_rmb(hw->weak_barriers);
1944 if (likely(nb_used > vq->vq_nentries - vq->vq_free_thresh))
1945 virtio_xmit_cleanup_inorder(vq, nb_used);
1947 for (nb_tx = 0; nb_tx < nb_pkts; nb_tx++) {
1948 struct rte_mbuf *txm = tx_pkts[nb_tx];
1951 /* optimize ring usage */
1952 if ((vtpci_with_feature(hw, VIRTIO_F_ANY_LAYOUT) ||
1953 vtpci_with_feature(hw, VIRTIO_F_VERSION_1)) &&
1954 rte_mbuf_refcnt_read(txm) == 1 &&
1955 RTE_MBUF_DIRECT(txm) &&
1956 txm->nb_segs == 1 &&
1957 rte_pktmbuf_headroom(txm) >= hdr_size &&
1958 rte_is_aligned(rte_pktmbuf_mtod(txm, char *),
1959 __alignof__(struct virtio_net_hdr_mrg_rxbuf))) {
1960 inorder_pkts[nb_inorder_pkts] = txm;
1966 if (nb_inorder_pkts) {
1967 need = nb_inorder_pkts - vq->vq_free_cnt;
1968 if (unlikely(need > 0)) {
1969 need = virtio_xmit_try_cleanup_inorder(vq,
1971 if (unlikely(need > 0)) {
1973 "No free tx descriptors to "
1978 virtqueue_enqueue_xmit_inorder(txvq, inorder_pkts,
1980 nb_inorder_pkts = 0;
1983 slots = txm->nb_segs + 1;
1984 need = slots - vq->vq_free_cnt;
1985 if (unlikely(need > 0)) {
1986 need = virtio_xmit_try_cleanup_inorder(vq, slots);
1988 if (unlikely(need > 0)) {
1990 "No free tx descriptors to transmit");
1994 /* Enqueue Packet buffers */
1995 virtqueue_enqueue_xmit(txvq, txm, slots, 0, 0, 1);
1997 virtio_update_packet_stats(&txvq->stats, txm);
2000 /* Transmit all inorder packets */
2001 if (nb_inorder_pkts) {
2002 need = nb_inorder_pkts - vq->vq_free_cnt;
2003 if (unlikely(need > 0)) {
2004 need = virtio_xmit_try_cleanup_inorder(vq,
2006 if (unlikely(need > 0)) {
2008 "No free tx descriptors to transmit");
2009 nb_inorder_pkts = vq->vq_free_cnt;
2014 virtqueue_enqueue_xmit_inorder(txvq, inorder_pkts,
2018 txvq->stats.packets += nb_tx;
2020 if (likely(nb_tx)) {
2021 vq_update_avail_idx(vq);
2023 if (unlikely(virtqueue_kick_prepare(vq))) {
2024 virtqueue_notify(vq);
2025 PMD_TX_LOG(DEBUG, "Notified backend after xmit");