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
virtio_dev_rx_queue_done(void * rxq,uint16_t offset)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
vq_ring_free_inorder(struct virtqueue * vq,uint16_t desc_idx,uint16_t num)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
vq_ring_free_chain(struct virtqueue * vq,uint16_t desc_idx)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
virtio_update_packet_stats(struct virtnet_stats * stats,struct rte_mbuf * mbuf)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
virtio_rx_stats_updated(struct virtnet_rx * rxvq,struct rte_mbuf * m)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
virtqueue_dequeue_burst_rx_packed(struct virtqueue * vq,struct rte_mbuf ** rx_pkts,uint32_t * len,uint16_t num)135 virtqueue_dequeue_burst_rx_packed(struct virtqueue *vq,
136 struct rte_mbuf **rx_pkts,
137 uint32_t *len,
138 uint16_t num)
139 {
140 struct rte_mbuf *cookie;
141 uint16_t used_idx;
142 uint16_t id;
143 struct vring_packed_desc *desc;
144 uint16_t i;
145
146 desc = vq->vq_packed.ring.desc;
147
148 for (i = 0; i < num; i++) {
149 used_idx = vq->vq_used_cons_idx;
150 /* desc_is_used has a load-acquire or rte_io_rmb inside
151 * and wait for used desc in virtqueue.
152 */
153 if (!desc_is_used(&desc[used_idx], vq))
154 return i;
155 len[i] = desc[used_idx].len;
156 id = desc[used_idx].id;
157 cookie = (struct rte_mbuf *)vq->vq_descx[id].cookie;
158 if (unlikely(cookie == NULL)) {
159 PMD_DRV_LOG(ERR, "vring descriptor with no mbuf cookie at %u",
160 vq->vq_used_cons_idx);
161 break;
162 }
163 rte_prefetch0(cookie);
164 rte_packet_prefetch(rte_pktmbuf_mtod(cookie, void *));
165 rx_pkts[i] = cookie;
166
167 vq->vq_free_cnt++;
168 vq->vq_used_cons_idx++;
169 if (vq->vq_used_cons_idx >= vq->vq_nentries) {
170 vq->vq_used_cons_idx -= vq->vq_nentries;
171 vq->vq_packed.used_wrap_counter ^= 1;
172 }
173 }
174
175 return i;
176 }
177
178 static uint16_t
virtqueue_dequeue_burst_rx(struct virtqueue * vq,struct rte_mbuf ** rx_pkts,uint32_t * len,uint16_t num)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
virtqueue_dequeue_rx_inorder(struct virtqueue * vq,struct rte_mbuf ** rx_pkts,uint32_t * len,uint16_t num)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
virtqueue_enqueue_refill_inorder(struct virtqueue * vq,struct rte_mbuf ** cookies,uint16_t num)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
virtqueue_enqueue_recv_refill(struct virtqueue * vq,struct rte_mbuf ** cookie,uint16_t num)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
virtqueue_enqueue_recv_refill_packed(struct virtqueue * vq,struct rte_mbuf ** cookie,uint16_t num)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
virtio_tso_fix_cksum(struct rte_mbuf * m)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
virtqueue_enqueue_xmit_inorder(struct virtnet_tx * txvq,struct rte_mbuf ** cookies,uint16_t num)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
virtqueue_enqueue_xmit_packed_fast(struct virtnet_tx * txvq,struct rte_mbuf * cookie,int in_order)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
virtqueue_enqueue_xmit(struct virtnet_tx * txvq,struct rte_mbuf * cookie,uint16_t needed,int use_indirect,int can_push,int in_order)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
virtio_dev_cq_start(struct rte_eth_dev * dev)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
virtio_dev_rx_queue_setup(struct rte_eth_dev * dev,uint16_t queue_idx,uint16_t nb_desc,unsigned int socket_id __rte_unused,const struct rte_eth_rxconf * rx_conf,struct rte_mempool * mp)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
virtio_dev_rx_queue_setup_finish(struct rte_eth_dev * dev,uint16_t queue_idx)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
virtio_dev_tx_queue_setup(struct rte_eth_dev * dev,uint16_t queue_idx,uint16_t nb_desc,unsigned int socket_id __rte_unused,const struct rte_eth_txconf * tx_conf)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
virtio_dev_tx_queue_setup_finish(struct rte_eth_dev * dev,uint16_t queue_idx)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
virtio_discard_rxbuf(struct virtqueue * vq,struct rte_mbuf * m)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
virtio_discard_rxbuf_inorder(struct virtqueue * vq,struct rte_mbuf * m)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
virtio_rx_offload(struct rte_mbuf * m,struct virtio_net_hdr * hdr)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 if (rte_raw_cksum_mbuf(m, hdr->csum_start,
914 rte_pktmbuf_pkt_len(m) - hdr->csum_start,
915 &csum) < 0)
916 return -EINVAL;
917 if (likely(csum != 0xffff))
918 csum = ~csum;
919 off = hdr->csum_offset + hdr->csum_start;
920 if (rte_pktmbuf_data_len(m) >= off + 1)
921 *rte_pktmbuf_mtod_offset(m, uint16_t *,
922 off) = csum;
923 }
924 } else if (hdr->flags & VIRTIO_NET_HDR_F_DATA_VALID && l4_supported) {
925 m->ol_flags |= PKT_RX_L4_CKSUM_GOOD;
926 }
927
928 /* GSO request, save required information in mbuf */
929 if (hdr->gso_type != VIRTIO_NET_HDR_GSO_NONE) {
930 /* Check unsupported modes */
931 if ((hdr->gso_type & VIRTIO_NET_HDR_GSO_ECN) ||
932 (hdr->gso_size == 0)) {
933 return -EINVAL;
934 }
935
936 /* Update mss lengthes in mbuf */
937 m->tso_segsz = hdr->gso_size;
938 switch (hdr->gso_type & ~VIRTIO_NET_HDR_GSO_ECN) {
939 case VIRTIO_NET_HDR_GSO_TCPV4:
940 case VIRTIO_NET_HDR_GSO_TCPV6:
941 m->ol_flags |= PKT_RX_LRO | \
942 PKT_RX_L4_CKSUM_NONE;
943 break;
944 default:
945 return -EINVAL;
946 }
947 }
948
949 return 0;
950 }
951
952 #define DESC_PER_CACHELINE (RTE_CACHE_LINE_SIZE / sizeof(struct vring_desc))
953 uint16_t
virtio_recv_pkts(void * rx_queue,struct rte_mbuf ** rx_pkts,uint16_t nb_pkts)954 virtio_recv_pkts(void *rx_queue, struct rte_mbuf **rx_pkts, uint16_t nb_pkts)
955 {
956 struct virtnet_rx *rxvq = rx_queue;
957 struct virtqueue *vq = rxvq->vq;
958 struct virtio_hw *hw = vq->hw;
959 struct rte_mbuf *rxm;
960 uint16_t nb_used, num, nb_rx;
961 uint32_t len[VIRTIO_MBUF_BURST_SZ];
962 struct rte_mbuf *rcv_pkts[VIRTIO_MBUF_BURST_SZ];
963 int error;
964 uint32_t i, nb_enqueued;
965 uint32_t hdr_size;
966 struct virtio_net_hdr *hdr;
967
968 nb_rx = 0;
969 if (unlikely(hw->started == 0))
970 return nb_rx;
971
972 nb_used = virtqueue_nused(vq);
973
974 num = likely(nb_used <= nb_pkts) ? nb_used : nb_pkts;
975 if (unlikely(num > VIRTIO_MBUF_BURST_SZ))
976 num = VIRTIO_MBUF_BURST_SZ;
977 if (likely(num > DESC_PER_CACHELINE))
978 num = num - ((vq->vq_used_cons_idx + num) % DESC_PER_CACHELINE);
979
980 num = virtqueue_dequeue_burst_rx(vq, rcv_pkts, len, num);
981 PMD_RX_LOG(DEBUG, "used:%d dequeue:%d", nb_used, num);
982
983 nb_enqueued = 0;
984 hdr_size = hw->vtnet_hdr_size;
985
986 for (i = 0; i < num ; i++) {
987 rxm = rcv_pkts[i];
988
989 PMD_RX_LOG(DEBUG, "packet len:%d", len[i]);
990
991 if (unlikely(len[i] < hdr_size + RTE_ETHER_HDR_LEN)) {
992 PMD_RX_LOG(ERR, "Packet drop");
993 nb_enqueued++;
994 virtio_discard_rxbuf(vq, rxm);
995 rxvq->stats.errors++;
996 continue;
997 }
998
999 rxm->port = rxvq->port_id;
1000 rxm->data_off = RTE_PKTMBUF_HEADROOM;
1001 rxm->ol_flags = 0;
1002 rxm->vlan_tci = 0;
1003
1004 rxm->pkt_len = (uint32_t)(len[i] - hdr_size);
1005 rxm->data_len = (uint16_t)(len[i] - hdr_size);
1006
1007 hdr = (struct virtio_net_hdr *)((char *)rxm->buf_addr +
1008 RTE_PKTMBUF_HEADROOM - hdr_size);
1009
1010 if (hw->vlan_strip)
1011 rte_vlan_strip(rxm);
1012
1013 if (hw->has_rx_offload && virtio_rx_offload(rxm, hdr) < 0) {
1014 virtio_discard_rxbuf(vq, rxm);
1015 rxvq->stats.errors++;
1016 continue;
1017 }
1018
1019 virtio_rx_stats_updated(rxvq, rxm);
1020
1021 rx_pkts[nb_rx++] = rxm;
1022 }
1023
1024 rxvq->stats.packets += nb_rx;
1025
1026 /* Allocate new mbuf for the used descriptor */
1027 if (likely(!virtqueue_full(vq))) {
1028 uint16_t free_cnt = vq->vq_free_cnt;
1029 struct rte_mbuf *new_pkts[free_cnt];
1030
1031 if (likely(rte_pktmbuf_alloc_bulk(rxvq->mpool, new_pkts,
1032 free_cnt) == 0)) {
1033 error = virtqueue_enqueue_recv_refill(vq, new_pkts,
1034 free_cnt);
1035 if (unlikely(error)) {
1036 for (i = 0; i < free_cnt; i++)
1037 rte_pktmbuf_free(new_pkts[i]);
1038 }
1039 nb_enqueued += free_cnt;
1040 } else {
1041 struct rte_eth_dev *dev =
1042 &rte_eth_devices[rxvq->port_id];
1043 dev->data->rx_mbuf_alloc_failed += free_cnt;
1044 }
1045 }
1046
1047 if (likely(nb_enqueued)) {
1048 vq_update_avail_idx(vq);
1049
1050 if (unlikely(virtqueue_kick_prepare(vq))) {
1051 virtqueue_notify(vq);
1052 PMD_RX_LOG(DEBUG, "Notified");
1053 }
1054 }
1055
1056 return nb_rx;
1057 }
1058
1059 uint16_t
virtio_recv_pkts_packed(void * rx_queue,struct rte_mbuf ** rx_pkts,uint16_t nb_pkts)1060 virtio_recv_pkts_packed(void *rx_queue, struct rte_mbuf **rx_pkts,
1061 uint16_t nb_pkts)
1062 {
1063 struct virtnet_rx *rxvq = rx_queue;
1064 struct virtqueue *vq = rxvq->vq;
1065 struct virtio_hw *hw = vq->hw;
1066 struct rte_mbuf *rxm;
1067 uint16_t num, nb_rx;
1068 uint32_t len[VIRTIO_MBUF_BURST_SZ];
1069 struct rte_mbuf *rcv_pkts[VIRTIO_MBUF_BURST_SZ];
1070 int error;
1071 uint32_t i, nb_enqueued;
1072 uint32_t hdr_size;
1073 struct virtio_net_hdr *hdr;
1074
1075 nb_rx = 0;
1076 if (unlikely(hw->started == 0))
1077 return nb_rx;
1078
1079 num = RTE_MIN(VIRTIO_MBUF_BURST_SZ, nb_pkts);
1080 if (likely(num > DESC_PER_CACHELINE))
1081 num = num - ((vq->vq_used_cons_idx + num) % DESC_PER_CACHELINE);
1082
1083 num = virtqueue_dequeue_burst_rx_packed(vq, rcv_pkts, len, num);
1084 PMD_RX_LOG(DEBUG, "dequeue:%d", num);
1085
1086 nb_enqueued = 0;
1087 hdr_size = hw->vtnet_hdr_size;
1088
1089 for (i = 0; i < num; i++) {
1090 rxm = rcv_pkts[i];
1091
1092 PMD_RX_LOG(DEBUG, "packet len:%d", len[i]);
1093
1094 if (unlikely(len[i] < hdr_size + RTE_ETHER_HDR_LEN)) {
1095 PMD_RX_LOG(ERR, "Packet drop");
1096 nb_enqueued++;
1097 virtio_discard_rxbuf(vq, rxm);
1098 rxvq->stats.errors++;
1099 continue;
1100 }
1101
1102 rxm->port = rxvq->port_id;
1103 rxm->data_off = RTE_PKTMBUF_HEADROOM;
1104 rxm->ol_flags = 0;
1105 rxm->vlan_tci = 0;
1106
1107 rxm->pkt_len = (uint32_t)(len[i] - hdr_size);
1108 rxm->data_len = (uint16_t)(len[i] - hdr_size);
1109
1110 hdr = (struct virtio_net_hdr *)((char *)rxm->buf_addr +
1111 RTE_PKTMBUF_HEADROOM - hdr_size);
1112
1113 if (hw->vlan_strip)
1114 rte_vlan_strip(rxm);
1115
1116 if (hw->has_rx_offload && virtio_rx_offload(rxm, hdr) < 0) {
1117 virtio_discard_rxbuf(vq, rxm);
1118 rxvq->stats.errors++;
1119 continue;
1120 }
1121
1122 virtio_rx_stats_updated(rxvq, rxm);
1123
1124 rx_pkts[nb_rx++] = rxm;
1125 }
1126
1127 rxvq->stats.packets += nb_rx;
1128
1129 /* Allocate new mbuf for the used descriptor */
1130 if (likely(!virtqueue_full(vq))) {
1131 uint16_t free_cnt = vq->vq_free_cnt;
1132 struct rte_mbuf *new_pkts[free_cnt];
1133
1134 if (likely(rte_pktmbuf_alloc_bulk(rxvq->mpool, new_pkts,
1135 free_cnt) == 0)) {
1136 error = virtqueue_enqueue_recv_refill_packed(vq,
1137 new_pkts, free_cnt);
1138 if (unlikely(error)) {
1139 for (i = 0; i < free_cnt; i++)
1140 rte_pktmbuf_free(new_pkts[i]);
1141 }
1142 nb_enqueued += free_cnt;
1143 } else {
1144 struct rte_eth_dev *dev =
1145 &rte_eth_devices[rxvq->port_id];
1146 dev->data->rx_mbuf_alloc_failed += free_cnt;
1147 }
1148 }
1149
1150 if (likely(nb_enqueued)) {
1151 if (unlikely(virtqueue_kick_prepare_packed(vq))) {
1152 virtqueue_notify(vq);
1153 PMD_RX_LOG(DEBUG, "Notified");
1154 }
1155 }
1156
1157 return nb_rx;
1158 }
1159
1160
1161 uint16_t
virtio_recv_pkts_inorder(void * rx_queue,struct rte_mbuf ** rx_pkts,uint16_t nb_pkts)1162 virtio_recv_pkts_inorder(void *rx_queue,
1163 struct rte_mbuf **rx_pkts,
1164 uint16_t nb_pkts)
1165 {
1166 struct virtnet_rx *rxvq = rx_queue;
1167 struct virtqueue *vq = rxvq->vq;
1168 struct virtio_hw *hw = vq->hw;
1169 struct rte_mbuf *rxm;
1170 struct rte_mbuf *prev = NULL;
1171 uint16_t nb_used, num, nb_rx;
1172 uint32_t len[VIRTIO_MBUF_BURST_SZ];
1173 struct rte_mbuf *rcv_pkts[VIRTIO_MBUF_BURST_SZ];
1174 int error;
1175 uint32_t nb_enqueued;
1176 uint32_t seg_num;
1177 uint32_t seg_res;
1178 uint32_t hdr_size;
1179 int32_t i;
1180
1181 nb_rx = 0;
1182 if (unlikely(hw->started == 0))
1183 return nb_rx;
1184
1185 nb_used = virtqueue_nused(vq);
1186 nb_used = RTE_MIN(nb_used, nb_pkts);
1187 nb_used = RTE_MIN(nb_used, VIRTIO_MBUF_BURST_SZ);
1188
1189 PMD_RX_LOG(DEBUG, "used:%d", nb_used);
1190
1191 nb_enqueued = 0;
1192 seg_num = 1;
1193 seg_res = 0;
1194 hdr_size = hw->vtnet_hdr_size;
1195
1196 num = virtqueue_dequeue_rx_inorder(vq, rcv_pkts, len, nb_used);
1197
1198 for (i = 0; i < num; i++) {
1199 struct virtio_net_hdr_mrg_rxbuf *header;
1200
1201 PMD_RX_LOG(DEBUG, "dequeue:%d", num);
1202 PMD_RX_LOG(DEBUG, "packet len:%d", len[i]);
1203
1204 rxm = rcv_pkts[i];
1205
1206 if (unlikely(len[i] < hdr_size + RTE_ETHER_HDR_LEN)) {
1207 PMD_RX_LOG(ERR, "Packet drop");
1208 nb_enqueued++;
1209 virtio_discard_rxbuf_inorder(vq, rxm);
1210 rxvq->stats.errors++;
1211 continue;
1212 }
1213
1214 header = (struct virtio_net_hdr_mrg_rxbuf *)
1215 ((char *)rxm->buf_addr + RTE_PKTMBUF_HEADROOM
1216 - hdr_size);
1217
1218 if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF)) {
1219 seg_num = header->num_buffers;
1220 if (seg_num == 0)
1221 seg_num = 1;
1222 } else {
1223 seg_num = 1;
1224 }
1225
1226 rxm->data_off = RTE_PKTMBUF_HEADROOM;
1227 rxm->nb_segs = seg_num;
1228 rxm->ol_flags = 0;
1229 rxm->vlan_tci = 0;
1230 rxm->pkt_len = (uint32_t)(len[i] - hdr_size);
1231 rxm->data_len = (uint16_t)(len[i] - hdr_size);
1232
1233 rxm->port = rxvq->port_id;
1234
1235 rx_pkts[nb_rx] = rxm;
1236 prev = rxm;
1237
1238 if (vq->hw->has_rx_offload &&
1239 virtio_rx_offload(rxm, &header->hdr) < 0) {
1240 virtio_discard_rxbuf_inorder(vq, rxm);
1241 rxvq->stats.errors++;
1242 continue;
1243 }
1244
1245 if (hw->vlan_strip)
1246 rte_vlan_strip(rx_pkts[nb_rx]);
1247
1248 seg_res = seg_num - 1;
1249
1250 /* Merge remaining segments */
1251 while (seg_res != 0 && i < (num - 1)) {
1252 i++;
1253
1254 rxm = rcv_pkts[i];
1255 rxm->data_off = RTE_PKTMBUF_HEADROOM - hdr_size;
1256 rxm->pkt_len = (uint32_t)(len[i]);
1257 rxm->data_len = (uint16_t)(len[i]);
1258
1259 rx_pkts[nb_rx]->pkt_len += (uint32_t)(len[i]);
1260
1261 prev->next = rxm;
1262 prev = rxm;
1263 seg_res -= 1;
1264 }
1265
1266 if (!seg_res) {
1267 virtio_rx_stats_updated(rxvq, rx_pkts[nb_rx]);
1268 nb_rx++;
1269 }
1270 }
1271
1272 /* Last packet still need merge segments */
1273 while (seg_res != 0) {
1274 uint16_t rcv_cnt = RTE_MIN((uint16_t)seg_res,
1275 VIRTIO_MBUF_BURST_SZ);
1276
1277 if (likely(virtqueue_nused(vq) >= rcv_cnt)) {
1278 num = virtqueue_dequeue_rx_inorder(vq, rcv_pkts, len,
1279 rcv_cnt);
1280 uint16_t extra_idx = 0;
1281
1282 rcv_cnt = num;
1283 while (extra_idx < rcv_cnt) {
1284 rxm = rcv_pkts[extra_idx];
1285 rxm->data_off =
1286 RTE_PKTMBUF_HEADROOM - hdr_size;
1287 rxm->pkt_len = (uint32_t)(len[extra_idx]);
1288 rxm->data_len = (uint16_t)(len[extra_idx]);
1289 prev->next = rxm;
1290 prev = rxm;
1291 rx_pkts[nb_rx]->pkt_len += len[extra_idx];
1292 extra_idx += 1;
1293 };
1294 seg_res -= rcv_cnt;
1295
1296 if (!seg_res) {
1297 virtio_rx_stats_updated(rxvq, rx_pkts[nb_rx]);
1298 nb_rx++;
1299 }
1300 } else {
1301 PMD_RX_LOG(ERR,
1302 "No enough segments for packet.");
1303 rte_pktmbuf_free(rx_pkts[nb_rx]);
1304 rxvq->stats.errors++;
1305 break;
1306 }
1307 }
1308
1309 rxvq->stats.packets += nb_rx;
1310
1311 /* Allocate new mbuf for the used descriptor */
1312
1313 if (likely(!virtqueue_full(vq))) {
1314 /* free_cnt may include mrg descs */
1315 uint16_t free_cnt = vq->vq_free_cnt;
1316 struct rte_mbuf *new_pkts[free_cnt];
1317
1318 if (!rte_pktmbuf_alloc_bulk(rxvq->mpool, new_pkts, free_cnt)) {
1319 error = virtqueue_enqueue_refill_inorder(vq, new_pkts,
1320 free_cnt);
1321 if (unlikely(error)) {
1322 for (i = 0; i < free_cnt; i++)
1323 rte_pktmbuf_free(new_pkts[i]);
1324 }
1325 nb_enqueued += free_cnt;
1326 } else {
1327 struct rte_eth_dev *dev =
1328 &rte_eth_devices[rxvq->port_id];
1329 dev->data->rx_mbuf_alloc_failed += free_cnt;
1330 }
1331 }
1332
1333 if (likely(nb_enqueued)) {
1334 vq_update_avail_idx(vq);
1335
1336 if (unlikely(virtqueue_kick_prepare(vq))) {
1337 virtqueue_notify(vq);
1338 PMD_RX_LOG(DEBUG, "Notified");
1339 }
1340 }
1341
1342 return nb_rx;
1343 }
1344
1345 uint16_t
virtio_recv_mergeable_pkts(void * rx_queue,struct rte_mbuf ** rx_pkts,uint16_t nb_pkts)1346 virtio_recv_mergeable_pkts(void *rx_queue,
1347 struct rte_mbuf **rx_pkts,
1348 uint16_t nb_pkts)
1349 {
1350 struct virtnet_rx *rxvq = rx_queue;
1351 struct virtqueue *vq = rxvq->vq;
1352 struct virtio_hw *hw = vq->hw;
1353 struct rte_mbuf *rxm;
1354 struct rte_mbuf *prev = NULL;
1355 uint16_t nb_used, num, nb_rx = 0;
1356 uint32_t len[VIRTIO_MBUF_BURST_SZ];
1357 struct rte_mbuf *rcv_pkts[VIRTIO_MBUF_BURST_SZ];
1358 int error;
1359 uint32_t nb_enqueued = 0;
1360 uint32_t seg_num = 0;
1361 uint32_t seg_res = 0;
1362 uint32_t hdr_size = hw->vtnet_hdr_size;
1363 int32_t i;
1364
1365 if (unlikely(hw->started == 0))
1366 return nb_rx;
1367
1368 nb_used = virtqueue_nused(vq);
1369
1370 PMD_RX_LOG(DEBUG, "used:%d", nb_used);
1371
1372 num = likely(nb_used <= nb_pkts) ? nb_used : nb_pkts;
1373 if (unlikely(num > VIRTIO_MBUF_BURST_SZ))
1374 num = VIRTIO_MBUF_BURST_SZ;
1375 if (likely(num > DESC_PER_CACHELINE))
1376 num = num - ((vq->vq_used_cons_idx + num) %
1377 DESC_PER_CACHELINE);
1378
1379
1380 num = virtqueue_dequeue_burst_rx(vq, rcv_pkts, len, num);
1381
1382 for (i = 0; i < num; i++) {
1383 struct virtio_net_hdr_mrg_rxbuf *header;
1384
1385 PMD_RX_LOG(DEBUG, "dequeue:%d", num);
1386 PMD_RX_LOG(DEBUG, "packet len:%d", len[i]);
1387
1388 rxm = rcv_pkts[i];
1389
1390 if (unlikely(len[i] < hdr_size + RTE_ETHER_HDR_LEN)) {
1391 PMD_RX_LOG(ERR, "Packet drop");
1392 nb_enqueued++;
1393 virtio_discard_rxbuf(vq, rxm);
1394 rxvq->stats.errors++;
1395 continue;
1396 }
1397
1398 header = (struct virtio_net_hdr_mrg_rxbuf *)
1399 ((char *)rxm->buf_addr + RTE_PKTMBUF_HEADROOM
1400 - hdr_size);
1401 seg_num = header->num_buffers;
1402 if (seg_num == 0)
1403 seg_num = 1;
1404
1405 rxm->data_off = RTE_PKTMBUF_HEADROOM;
1406 rxm->nb_segs = seg_num;
1407 rxm->ol_flags = 0;
1408 rxm->vlan_tci = 0;
1409 rxm->pkt_len = (uint32_t)(len[i] - hdr_size);
1410 rxm->data_len = (uint16_t)(len[i] - hdr_size);
1411
1412 rxm->port = rxvq->port_id;
1413
1414 rx_pkts[nb_rx] = rxm;
1415 prev = rxm;
1416
1417 if (hw->has_rx_offload &&
1418 virtio_rx_offload(rxm, &header->hdr) < 0) {
1419 virtio_discard_rxbuf(vq, rxm);
1420 rxvq->stats.errors++;
1421 continue;
1422 }
1423
1424 if (hw->vlan_strip)
1425 rte_vlan_strip(rx_pkts[nb_rx]);
1426
1427 seg_res = seg_num - 1;
1428
1429 /* Merge remaining segments */
1430 while (seg_res != 0 && i < (num - 1)) {
1431 i++;
1432
1433 rxm = rcv_pkts[i];
1434 rxm->data_off = RTE_PKTMBUF_HEADROOM - hdr_size;
1435 rxm->pkt_len = (uint32_t)(len[i]);
1436 rxm->data_len = (uint16_t)(len[i]);
1437
1438 rx_pkts[nb_rx]->pkt_len += (uint32_t)(len[i]);
1439
1440 prev->next = rxm;
1441 prev = rxm;
1442 seg_res -= 1;
1443 }
1444
1445 if (!seg_res) {
1446 virtio_rx_stats_updated(rxvq, rx_pkts[nb_rx]);
1447 nb_rx++;
1448 }
1449 }
1450
1451 /* Last packet still need merge segments */
1452 while (seg_res != 0) {
1453 uint16_t rcv_cnt = RTE_MIN((uint16_t)seg_res,
1454 VIRTIO_MBUF_BURST_SZ);
1455
1456 if (likely(virtqueue_nused(vq) >= rcv_cnt)) {
1457 num = virtqueue_dequeue_burst_rx(vq, rcv_pkts, len,
1458 rcv_cnt);
1459 uint16_t extra_idx = 0;
1460
1461 rcv_cnt = num;
1462 while (extra_idx < rcv_cnt) {
1463 rxm = rcv_pkts[extra_idx];
1464 rxm->data_off =
1465 RTE_PKTMBUF_HEADROOM - hdr_size;
1466 rxm->pkt_len = (uint32_t)(len[extra_idx]);
1467 rxm->data_len = (uint16_t)(len[extra_idx]);
1468 prev->next = rxm;
1469 prev = rxm;
1470 rx_pkts[nb_rx]->pkt_len += len[extra_idx];
1471 extra_idx += 1;
1472 };
1473 seg_res -= rcv_cnt;
1474
1475 if (!seg_res) {
1476 virtio_rx_stats_updated(rxvq, rx_pkts[nb_rx]);
1477 nb_rx++;
1478 }
1479 } else {
1480 PMD_RX_LOG(ERR,
1481 "No enough segments for packet.");
1482 rte_pktmbuf_free(rx_pkts[nb_rx]);
1483 rxvq->stats.errors++;
1484 break;
1485 }
1486 }
1487
1488 rxvq->stats.packets += nb_rx;
1489
1490 /* Allocate new mbuf for the used descriptor */
1491 if (likely(!virtqueue_full(vq))) {
1492 /* free_cnt may include mrg descs */
1493 uint16_t free_cnt = vq->vq_free_cnt;
1494 struct rte_mbuf *new_pkts[free_cnt];
1495
1496 if (!rte_pktmbuf_alloc_bulk(rxvq->mpool, new_pkts, free_cnt)) {
1497 error = virtqueue_enqueue_recv_refill(vq, new_pkts,
1498 free_cnt);
1499 if (unlikely(error)) {
1500 for (i = 0; i < free_cnt; i++)
1501 rte_pktmbuf_free(new_pkts[i]);
1502 }
1503 nb_enqueued += free_cnt;
1504 } else {
1505 struct rte_eth_dev *dev =
1506 &rte_eth_devices[rxvq->port_id];
1507 dev->data->rx_mbuf_alloc_failed += free_cnt;
1508 }
1509 }
1510
1511 if (likely(nb_enqueued)) {
1512 vq_update_avail_idx(vq);
1513
1514 if (unlikely(virtqueue_kick_prepare(vq))) {
1515 virtqueue_notify(vq);
1516 PMD_RX_LOG(DEBUG, "Notified");
1517 }
1518 }
1519
1520 return nb_rx;
1521 }
1522
1523 uint16_t
virtio_recv_mergeable_pkts_packed(void * rx_queue,struct rte_mbuf ** rx_pkts,uint16_t nb_pkts)1524 virtio_recv_mergeable_pkts_packed(void *rx_queue,
1525 struct rte_mbuf **rx_pkts,
1526 uint16_t nb_pkts)
1527 {
1528 struct virtnet_rx *rxvq = rx_queue;
1529 struct virtqueue *vq = rxvq->vq;
1530 struct virtio_hw *hw = vq->hw;
1531 struct rte_mbuf *rxm;
1532 struct rte_mbuf *prev = NULL;
1533 uint16_t num, nb_rx = 0;
1534 uint32_t len[VIRTIO_MBUF_BURST_SZ];
1535 struct rte_mbuf *rcv_pkts[VIRTIO_MBUF_BURST_SZ];
1536 uint32_t nb_enqueued = 0;
1537 uint32_t seg_num = 0;
1538 uint32_t seg_res = 0;
1539 uint32_t hdr_size = hw->vtnet_hdr_size;
1540 int32_t i;
1541 int error;
1542
1543 if (unlikely(hw->started == 0))
1544 return nb_rx;
1545
1546
1547 num = nb_pkts;
1548 if (unlikely(num > VIRTIO_MBUF_BURST_SZ))
1549 num = VIRTIO_MBUF_BURST_SZ;
1550 if (likely(num > DESC_PER_CACHELINE))
1551 num = num - ((vq->vq_used_cons_idx + num) % DESC_PER_CACHELINE);
1552
1553 num = virtqueue_dequeue_burst_rx_packed(vq, rcv_pkts, len, num);
1554
1555 for (i = 0; i < num; i++) {
1556 struct virtio_net_hdr_mrg_rxbuf *header;
1557
1558 PMD_RX_LOG(DEBUG, "dequeue:%d", num);
1559 PMD_RX_LOG(DEBUG, "packet len:%d", len[i]);
1560
1561 rxm = rcv_pkts[i];
1562
1563 if (unlikely(len[i] < hdr_size + RTE_ETHER_HDR_LEN)) {
1564 PMD_RX_LOG(ERR, "Packet drop");
1565 nb_enqueued++;
1566 virtio_discard_rxbuf(vq, rxm);
1567 rxvq->stats.errors++;
1568 continue;
1569 }
1570
1571 header = (struct virtio_net_hdr_mrg_rxbuf *)((char *)
1572 rxm->buf_addr + RTE_PKTMBUF_HEADROOM - hdr_size);
1573 seg_num = header->num_buffers;
1574
1575 if (seg_num == 0)
1576 seg_num = 1;
1577
1578 rxm->data_off = RTE_PKTMBUF_HEADROOM;
1579 rxm->nb_segs = seg_num;
1580 rxm->ol_flags = 0;
1581 rxm->vlan_tci = 0;
1582 rxm->pkt_len = (uint32_t)(len[i] - hdr_size);
1583 rxm->data_len = (uint16_t)(len[i] - hdr_size);
1584
1585 rxm->port = rxvq->port_id;
1586 rx_pkts[nb_rx] = rxm;
1587 prev = rxm;
1588
1589 if (hw->has_rx_offload &&
1590 virtio_rx_offload(rxm, &header->hdr) < 0) {
1591 virtio_discard_rxbuf(vq, rxm);
1592 rxvq->stats.errors++;
1593 continue;
1594 }
1595
1596 if (hw->vlan_strip)
1597 rte_vlan_strip(rx_pkts[nb_rx]);
1598
1599 seg_res = seg_num - 1;
1600
1601 /* Merge remaining segments */
1602 while (seg_res != 0 && i < (num - 1)) {
1603 i++;
1604
1605 rxm = rcv_pkts[i];
1606 rxm->data_off = RTE_PKTMBUF_HEADROOM - hdr_size;
1607 rxm->pkt_len = (uint32_t)(len[i]);
1608 rxm->data_len = (uint16_t)(len[i]);
1609
1610 rx_pkts[nb_rx]->pkt_len += (uint32_t)(len[i]);
1611
1612 prev->next = rxm;
1613 prev = rxm;
1614 seg_res -= 1;
1615 }
1616
1617 if (!seg_res) {
1618 virtio_rx_stats_updated(rxvq, rx_pkts[nb_rx]);
1619 nb_rx++;
1620 }
1621 }
1622
1623 /* Last packet still need merge segments */
1624 while (seg_res != 0) {
1625 uint16_t rcv_cnt = RTE_MIN((uint16_t)seg_res,
1626 VIRTIO_MBUF_BURST_SZ);
1627 uint16_t extra_idx = 0;
1628
1629 rcv_cnt = virtqueue_dequeue_burst_rx_packed(vq, rcv_pkts,
1630 len, rcv_cnt);
1631 if (unlikely(rcv_cnt == 0)) {
1632 PMD_RX_LOG(ERR, "No enough segments for packet.");
1633 rte_pktmbuf_free(rx_pkts[nb_rx]);
1634 rxvq->stats.errors++;
1635 break;
1636 }
1637
1638 while (extra_idx < rcv_cnt) {
1639 rxm = rcv_pkts[extra_idx];
1640
1641 rxm->data_off = RTE_PKTMBUF_HEADROOM - hdr_size;
1642 rxm->pkt_len = (uint32_t)(len[extra_idx]);
1643 rxm->data_len = (uint16_t)(len[extra_idx]);
1644
1645 prev->next = rxm;
1646 prev = rxm;
1647 rx_pkts[nb_rx]->pkt_len += len[extra_idx];
1648 extra_idx += 1;
1649 }
1650 seg_res -= rcv_cnt;
1651 if (!seg_res) {
1652 virtio_rx_stats_updated(rxvq, rx_pkts[nb_rx]);
1653 nb_rx++;
1654 }
1655 }
1656
1657 rxvq->stats.packets += nb_rx;
1658
1659 /* Allocate new mbuf for the used descriptor */
1660 if (likely(!virtqueue_full(vq))) {
1661 /* free_cnt may include mrg descs */
1662 uint16_t free_cnt = vq->vq_free_cnt;
1663 struct rte_mbuf *new_pkts[free_cnt];
1664
1665 if (!rte_pktmbuf_alloc_bulk(rxvq->mpool, new_pkts, free_cnt)) {
1666 error = virtqueue_enqueue_recv_refill_packed(vq,
1667 new_pkts, free_cnt);
1668 if (unlikely(error)) {
1669 for (i = 0; i < free_cnt; i++)
1670 rte_pktmbuf_free(new_pkts[i]);
1671 }
1672 nb_enqueued += free_cnt;
1673 } else {
1674 struct rte_eth_dev *dev =
1675 &rte_eth_devices[rxvq->port_id];
1676 dev->data->rx_mbuf_alloc_failed += free_cnt;
1677 }
1678 }
1679
1680 if (likely(nb_enqueued)) {
1681 if (unlikely(virtqueue_kick_prepare_packed(vq))) {
1682 virtqueue_notify(vq);
1683 PMD_RX_LOG(DEBUG, "Notified");
1684 }
1685 }
1686
1687 return nb_rx;
1688 }
1689
1690 uint16_t
virtio_xmit_pkts_prepare(void * tx_queue __rte_unused,struct rte_mbuf ** tx_pkts,uint16_t nb_pkts)1691 virtio_xmit_pkts_prepare(void *tx_queue __rte_unused, struct rte_mbuf **tx_pkts,
1692 uint16_t nb_pkts)
1693 {
1694 uint16_t nb_tx;
1695 int error;
1696
1697 for (nb_tx = 0; nb_tx < nb_pkts; nb_tx++) {
1698 struct rte_mbuf *m = tx_pkts[nb_tx];
1699
1700 #ifdef RTE_LIBRTE_ETHDEV_DEBUG
1701 error = rte_validate_tx_offload(m);
1702 if (unlikely(error)) {
1703 rte_errno = -error;
1704 break;
1705 }
1706 #endif
1707
1708 /* Do VLAN tag insertion */
1709 if (unlikely(m->ol_flags & PKT_TX_VLAN_PKT)) {
1710 error = rte_vlan_insert(&m);
1711 /* rte_vlan_insert() may change pointer
1712 * even in the case of failure
1713 */
1714 tx_pkts[nb_tx] = m;
1715
1716 if (unlikely(error)) {
1717 rte_errno = -error;
1718 break;
1719 }
1720 }
1721
1722 error = rte_net_intel_cksum_prepare(m);
1723 if (unlikely(error)) {
1724 rte_errno = -error;
1725 break;
1726 }
1727
1728 if (m->ol_flags & PKT_TX_TCP_SEG)
1729 virtio_tso_fix_cksum(m);
1730 }
1731
1732 return nb_tx;
1733 }
1734
1735 uint16_t
virtio_xmit_pkts_packed(void * tx_queue,struct rte_mbuf ** tx_pkts,uint16_t nb_pkts)1736 virtio_xmit_pkts_packed(void *tx_queue, struct rte_mbuf **tx_pkts,
1737 uint16_t nb_pkts)
1738 {
1739 struct virtnet_tx *txvq = tx_queue;
1740 struct virtqueue *vq = txvq->vq;
1741 struct virtio_hw *hw = vq->hw;
1742 uint16_t hdr_size = hw->vtnet_hdr_size;
1743 uint16_t nb_tx = 0;
1744 bool in_order = vtpci_with_feature(hw, VIRTIO_F_IN_ORDER);
1745
1746 if (unlikely(hw->started == 0 && tx_pkts != hw->inject_pkts))
1747 return nb_tx;
1748
1749 if (unlikely(nb_pkts < 1))
1750 return nb_pkts;
1751
1752 PMD_TX_LOG(DEBUG, "%d packets to xmit", nb_pkts);
1753
1754 if (nb_pkts > vq->vq_free_cnt)
1755 virtio_xmit_cleanup_packed(vq, nb_pkts - vq->vq_free_cnt,
1756 in_order);
1757
1758 for (nb_tx = 0; nb_tx < nb_pkts; nb_tx++) {
1759 struct rte_mbuf *txm = tx_pkts[nb_tx];
1760 int can_push = 0, use_indirect = 0, slots, need;
1761
1762 /* optimize ring usage */
1763 if ((vtpci_with_feature(hw, VIRTIO_F_ANY_LAYOUT) ||
1764 vtpci_with_feature(hw, VIRTIO_F_VERSION_1)) &&
1765 rte_mbuf_refcnt_read(txm) == 1 &&
1766 RTE_MBUF_DIRECT(txm) &&
1767 txm->nb_segs == 1 &&
1768 rte_pktmbuf_headroom(txm) >= hdr_size &&
1769 rte_is_aligned(rte_pktmbuf_mtod(txm, char *),
1770 __alignof__(struct virtio_net_hdr_mrg_rxbuf)))
1771 can_push = 1;
1772 else if (vtpci_with_feature(hw, VIRTIO_RING_F_INDIRECT_DESC) &&
1773 txm->nb_segs < VIRTIO_MAX_TX_INDIRECT)
1774 use_indirect = 1;
1775 /* How many main ring entries are needed to this Tx?
1776 * indirect => 1
1777 * any_layout => number of segments
1778 * default => number of segments + 1
1779 */
1780 slots = use_indirect ? 1 : (txm->nb_segs + !can_push);
1781 need = slots - vq->vq_free_cnt;
1782
1783 /* Positive value indicates it need free vring descriptors */
1784 if (unlikely(need > 0)) {
1785 virtio_xmit_cleanup_packed(vq, need, in_order);
1786 need = slots - vq->vq_free_cnt;
1787 if (unlikely(need > 0)) {
1788 PMD_TX_LOG(ERR,
1789 "No free tx descriptors to transmit");
1790 break;
1791 }
1792 }
1793
1794 /* Enqueue Packet buffers */
1795 if (can_push)
1796 virtqueue_enqueue_xmit_packed_fast(txvq, txm, in_order);
1797 else
1798 virtqueue_enqueue_xmit_packed(txvq, txm, slots,
1799 use_indirect, 0,
1800 in_order);
1801
1802 virtio_update_packet_stats(&txvq->stats, txm);
1803 }
1804
1805 txvq->stats.packets += nb_tx;
1806
1807 if (likely(nb_tx)) {
1808 if (unlikely(virtqueue_kick_prepare_packed(vq))) {
1809 virtqueue_notify(vq);
1810 PMD_TX_LOG(DEBUG, "Notified backend after xmit");
1811 }
1812 }
1813
1814 return nb_tx;
1815 }
1816
1817 uint16_t
virtio_xmit_pkts(void * tx_queue,struct rte_mbuf ** tx_pkts,uint16_t nb_pkts)1818 virtio_xmit_pkts(void *tx_queue, struct rte_mbuf **tx_pkts, uint16_t nb_pkts)
1819 {
1820 struct virtnet_tx *txvq = tx_queue;
1821 struct virtqueue *vq = txvq->vq;
1822 struct virtio_hw *hw = vq->hw;
1823 uint16_t hdr_size = hw->vtnet_hdr_size;
1824 uint16_t nb_used, nb_tx = 0;
1825
1826 if (unlikely(hw->started == 0 && tx_pkts != hw->inject_pkts))
1827 return nb_tx;
1828
1829 if (unlikely(nb_pkts < 1))
1830 return nb_pkts;
1831
1832 PMD_TX_LOG(DEBUG, "%d packets to xmit", nb_pkts);
1833
1834 nb_used = virtqueue_nused(vq);
1835
1836 if (likely(nb_used > vq->vq_nentries - vq->vq_free_thresh))
1837 virtio_xmit_cleanup(vq, nb_used);
1838
1839 for (nb_tx = 0; nb_tx < nb_pkts; nb_tx++) {
1840 struct rte_mbuf *txm = tx_pkts[nb_tx];
1841 int can_push = 0, use_indirect = 0, slots, need;
1842
1843 /* optimize ring usage */
1844 if ((vtpci_with_feature(hw, VIRTIO_F_ANY_LAYOUT) ||
1845 vtpci_with_feature(hw, VIRTIO_F_VERSION_1)) &&
1846 rte_mbuf_refcnt_read(txm) == 1 &&
1847 RTE_MBUF_DIRECT(txm) &&
1848 txm->nb_segs == 1 &&
1849 rte_pktmbuf_headroom(txm) >= hdr_size &&
1850 rte_is_aligned(rte_pktmbuf_mtod(txm, char *),
1851 __alignof__(struct virtio_net_hdr_mrg_rxbuf)))
1852 can_push = 1;
1853 else if (vtpci_with_feature(hw, VIRTIO_RING_F_INDIRECT_DESC) &&
1854 txm->nb_segs < VIRTIO_MAX_TX_INDIRECT)
1855 use_indirect = 1;
1856
1857 /* How many main ring entries are needed to this Tx?
1858 * any_layout => number of segments
1859 * indirect => 1
1860 * default => number of segments + 1
1861 */
1862 slots = use_indirect ? 1 : (txm->nb_segs + !can_push);
1863 need = slots - vq->vq_free_cnt;
1864
1865 /* Positive value indicates it need free vring descriptors */
1866 if (unlikely(need > 0)) {
1867 nb_used = virtqueue_nused(vq);
1868
1869 need = RTE_MIN(need, (int)nb_used);
1870
1871 virtio_xmit_cleanup(vq, need);
1872 need = slots - vq->vq_free_cnt;
1873 if (unlikely(need > 0)) {
1874 PMD_TX_LOG(ERR,
1875 "No free tx descriptors to transmit");
1876 break;
1877 }
1878 }
1879
1880 /* Enqueue Packet buffers */
1881 virtqueue_enqueue_xmit(txvq, txm, slots, use_indirect,
1882 can_push, 0);
1883
1884 virtio_update_packet_stats(&txvq->stats, txm);
1885 }
1886
1887 txvq->stats.packets += nb_tx;
1888
1889 if (likely(nb_tx)) {
1890 vq_update_avail_idx(vq);
1891
1892 if (unlikely(virtqueue_kick_prepare(vq))) {
1893 virtqueue_notify(vq);
1894 PMD_TX_LOG(DEBUG, "Notified backend after xmit");
1895 }
1896 }
1897
1898 return nb_tx;
1899 }
1900
1901 static __rte_always_inline int
virtio_xmit_try_cleanup_inorder(struct virtqueue * vq,uint16_t need)1902 virtio_xmit_try_cleanup_inorder(struct virtqueue *vq, uint16_t need)
1903 {
1904 uint16_t nb_used, nb_clean, nb_descs;
1905
1906 nb_descs = vq->vq_free_cnt + need;
1907 nb_used = virtqueue_nused(vq);
1908 nb_clean = RTE_MIN(need, (int)nb_used);
1909
1910 virtio_xmit_cleanup_inorder(vq, nb_clean);
1911
1912 return nb_descs - vq->vq_free_cnt;
1913 }
1914
1915 uint16_t
virtio_xmit_pkts_inorder(void * tx_queue,struct rte_mbuf ** tx_pkts,uint16_t nb_pkts)1916 virtio_xmit_pkts_inorder(void *tx_queue,
1917 struct rte_mbuf **tx_pkts,
1918 uint16_t nb_pkts)
1919 {
1920 struct virtnet_tx *txvq = tx_queue;
1921 struct virtqueue *vq = txvq->vq;
1922 struct virtio_hw *hw = vq->hw;
1923 uint16_t hdr_size = hw->vtnet_hdr_size;
1924 uint16_t nb_used, nb_tx = 0, nb_inorder_pkts = 0;
1925 struct rte_mbuf *inorder_pkts[nb_pkts];
1926 int need;
1927
1928 if (unlikely(hw->started == 0 && tx_pkts != hw->inject_pkts))
1929 return nb_tx;
1930
1931 if (unlikely(nb_pkts < 1))
1932 return nb_pkts;
1933
1934 VIRTQUEUE_DUMP(vq);
1935 PMD_TX_LOG(DEBUG, "%d packets to xmit", nb_pkts);
1936 nb_used = virtqueue_nused(vq);
1937
1938 if (likely(nb_used > vq->vq_nentries - vq->vq_free_thresh))
1939 virtio_xmit_cleanup_inorder(vq, nb_used);
1940
1941 for (nb_tx = 0; nb_tx < nb_pkts; nb_tx++) {
1942 struct rte_mbuf *txm = tx_pkts[nb_tx];
1943 int slots;
1944
1945 /* optimize ring usage */
1946 if ((vtpci_with_feature(hw, VIRTIO_F_ANY_LAYOUT) ||
1947 vtpci_with_feature(hw, VIRTIO_F_VERSION_1)) &&
1948 rte_mbuf_refcnt_read(txm) == 1 &&
1949 RTE_MBUF_DIRECT(txm) &&
1950 txm->nb_segs == 1 &&
1951 rte_pktmbuf_headroom(txm) >= hdr_size &&
1952 rte_is_aligned(rte_pktmbuf_mtod(txm, char *),
1953 __alignof__(struct virtio_net_hdr_mrg_rxbuf))) {
1954 inorder_pkts[nb_inorder_pkts] = txm;
1955 nb_inorder_pkts++;
1956
1957 continue;
1958 }
1959
1960 if (nb_inorder_pkts) {
1961 need = nb_inorder_pkts - vq->vq_free_cnt;
1962 if (unlikely(need > 0)) {
1963 need = virtio_xmit_try_cleanup_inorder(vq,
1964 need);
1965 if (unlikely(need > 0)) {
1966 PMD_TX_LOG(ERR,
1967 "No free tx descriptors to "
1968 "transmit");
1969 break;
1970 }
1971 }
1972 virtqueue_enqueue_xmit_inorder(txvq, inorder_pkts,
1973 nb_inorder_pkts);
1974 nb_inorder_pkts = 0;
1975 }
1976
1977 slots = txm->nb_segs + 1;
1978 need = slots - vq->vq_free_cnt;
1979 if (unlikely(need > 0)) {
1980 need = virtio_xmit_try_cleanup_inorder(vq, slots);
1981
1982 if (unlikely(need > 0)) {
1983 PMD_TX_LOG(ERR,
1984 "No free tx descriptors to transmit");
1985 break;
1986 }
1987 }
1988 /* Enqueue Packet buffers */
1989 virtqueue_enqueue_xmit(txvq, txm, slots, 0, 0, 1);
1990
1991 virtio_update_packet_stats(&txvq->stats, txm);
1992 }
1993
1994 /* Transmit all inorder packets */
1995 if (nb_inorder_pkts) {
1996 need = nb_inorder_pkts - vq->vq_free_cnt;
1997 if (unlikely(need > 0)) {
1998 need = virtio_xmit_try_cleanup_inorder(vq,
1999 need);
2000 if (unlikely(need > 0)) {
2001 PMD_TX_LOG(ERR,
2002 "No free tx descriptors to transmit");
2003 nb_inorder_pkts = vq->vq_free_cnt;
2004 nb_tx -= need;
2005 }
2006 }
2007
2008 virtqueue_enqueue_xmit_inorder(txvq, inorder_pkts,
2009 nb_inorder_pkts);
2010 }
2011
2012 txvq->stats.packets += nb_tx;
2013
2014 if (likely(nb_tx)) {
2015 vq_update_avail_idx(vq);
2016
2017 if (unlikely(virtqueue_kick_prepare(vq))) {
2018 virtqueue_notify(vq);
2019 PMD_TX_LOG(DEBUG, "Notified backend after xmit");
2020 }
2021 }
2022
2023 VIRTQUEUE_DUMP(vq);
2024
2025 return nb_tx;
2026 }
2027
2028 #ifndef CC_AVX512_SUPPORT
2029 uint16_t
virtio_recv_pkts_packed_vec(void * rx_queue __rte_unused,struct rte_mbuf ** rx_pkts __rte_unused,uint16_t nb_pkts __rte_unused)2030 virtio_recv_pkts_packed_vec(void *rx_queue __rte_unused,
2031 struct rte_mbuf **rx_pkts __rte_unused,
2032 uint16_t nb_pkts __rte_unused)
2033 {
2034 return 0;
2035 }
2036
2037 uint16_t
virtio_xmit_pkts_packed_vec(void * tx_queue __rte_unused,struct rte_mbuf ** tx_pkts __rte_unused,uint16_t nb_pkts __rte_unused)2038 virtio_xmit_pkts_packed_vec(void *tx_queue __rte_unused,
2039 struct rte_mbuf **tx_pkts __rte_unused,
2040 uint16_t nb_pkts __rte_unused)
2041 {
2042 return 0;
2043 }
2044 #endif /* ifndef CC_AVX512_SUPPORT */
2045