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