4 * Copyright 2015 6WIND S.A.
5 * Copyright 2015 Mellanox.
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41 /* ISO C doesn't support unnamed structs/unions, disabling -pedantic. */
43 #pragma GCC diagnostic ignored "-pedantic"
45 #include <infiniband/verbs.h>
47 #pragma GCC diagnostic error "-pedantic"
50 /* DPDK headers don't like -pedantic. */
52 #pragma GCC diagnostic ignored "-pedantic"
55 #include <rte_malloc.h>
56 #include <rte_ethdev.h>
57 #include <rte_common.h>
59 #pragma GCC diagnostic error "-pedantic"
63 #include "mlx5_rxtx.h"
64 #include "mlx5_utils.h"
65 #include "mlx5_autoconf.h"
66 #include "mlx5_defs.h"
68 /* Initialization data for hash RX queues. */
69 const struct hash_rxq_init hash_rxq_init[] = {
71 .hash_fields = (IBV_EXP_RX_HASH_SRC_IPV4 |
72 IBV_EXP_RX_HASH_DST_IPV4 |
73 IBV_EXP_RX_HASH_SRC_PORT_TCP |
74 IBV_EXP_RX_HASH_DST_PORT_TCP),
75 .dpdk_rss_hf = ETH_RSS_NONFRAG_IPV4_TCP,
77 .flow_spec.tcp_udp = {
78 .type = IBV_EXP_FLOW_SPEC_TCP,
79 .size = sizeof(hash_rxq_init[0].flow_spec.tcp_udp),
81 .underlayer = &hash_rxq_init[HASH_RXQ_IPV4],
84 .hash_fields = (IBV_EXP_RX_HASH_SRC_IPV4 |
85 IBV_EXP_RX_HASH_DST_IPV4 |
86 IBV_EXP_RX_HASH_SRC_PORT_UDP |
87 IBV_EXP_RX_HASH_DST_PORT_UDP),
88 .dpdk_rss_hf = ETH_RSS_NONFRAG_IPV4_UDP,
90 .flow_spec.tcp_udp = {
91 .type = IBV_EXP_FLOW_SPEC_UDP,
92 .size = sizeof(hash_rxq_init[0].flow_spec.tcp_udp),
94 .underlayer = &hash_rxq_init[HASH_RXQ_IPV4],
97 .hash_fields = (IBV_EXP_RX_HASH_SRC_IPV4 |
98 IBV_EXP_RX_HASH_DST_IPV4),
99 .dpdk_rss_hf = (ETH_RSS_IPV4 |
103 .type = IBV_EXP_FLOW_SPEC_IPV4,
104 .size = sizeof(hash_rxq_init[0].flow_spec.ipv4),
106 .underlayer = &hash_rxq_init[HASH_RXQ_ETH],
108 #ifdef HAVE_FLOW_SPEC_IPV6
110 .hash_fields = (IBV_EXP_RX_HASH_SRC_IPV6 |
111 IBV_EXP_RX_HASH_DST_IPV6 |
112 IBV_EXP_RX_HASH_SRC_PORT_TCP |
113 IBV_EXP_RX_HASH_DST_PORT_TCP),
114 .dpdk_rss_hf = ETH_RSS_NONFRAG_IPV6_TCP,
116 .flow_spec.tcp_udp = {
117 .type = IBV_EXP_FLOW_SPEC_TCP,
118 .size = sizeof(hash_rxq_init[0].flow_spec.tcp_udp),
120 .underlayer = &hash_rxq_init[HASH_RXQ_IPV6],
123 .hash_fields = (IBV_EXP_RX_HASH_SRC_IPV6 |
124 IBV_EXP_RX_HASH_DST_IPV6 |
125 IBV_EXP_RX_HASH_SRC_PORT_UDP |
126 IBV_EXP_RX_HASH_DST_PORT_UDP),
127 .dpdk_rss_hf = ETH_RSS_NONFRAG_IPV6_UDP,
129 .flow_spec.tcp_udp = {
130 .type = IBV_EXP_FLOW_SPEC_UDP,
131 .size = sizeof(hash_rxq_init[0].flow_spec.tcp_udp),
133 .underlayer = &hash_rxq_init[HASH_RXQ_IPV6],
136 .hash_fields = (IBV_EXP_RX_HASH_SRC_IPV6 |
137 IBV_EXP_RX_HASH_DST_IPV6),
138 .dpdk_rss_hf = (ETH_RSS_IPV6 |
142 .type = IBV_EXP_FLOW_SPEC_IPV6,
143 .size = sizeof(hash_rxq_init[0].flow_spec.ipv6),
145 .underlayer = &hash_rxq_init[HASH_RXQ_ETH],
147 #endif /* HAVE_FLOW_SPEC_IPV6 */
153 .type = IBV_EXP_FLOW_SPEC_ETH,
154 .size = sizeof(hash_rxq_init[0].flow_spec.eth),
160 /* Number of entries in hash_rxq_init[]. */
161 const unsigned int hash_rxq_init_n = RTE_DIM(hash_rxq_init);
163 /* Initialization data for hash RX queue indirection tables. */
164 static const struct ind_table_init ind_table_init[] = {
166 .max_size = -1u, /* Superseded by HW limitations. */
168 1 << HASH_RXQ_TCPV4 |
169 1 << HASH_RXQ_UDPV4 |
171 #ifdef HAVE_FLOW_SPEC_IPV6
172 1 << HASH_RXQ_TCPV6 |
173 1 << HASH_RXQ_UDPV6 |
175 #endif /* HAVE_FLOW_SPEC_IPV6 */
177 #ifdef HAVE_FLOW_SPEC_IPV6
179 #else /* HAVE_FLOW_SPEC_IPV6 */
181 #endif /* HAVE_FLOW_SPEC_IPV6 */
185 .hash_types = 1 << HASH_RXQ_ETH,
190 #define IND_TABLE_INIT_N RTE_DIM(ind_table_init)
192 /* Default RSS hash key also used for ConnectX-3. */
193 uint8_t rss_hash_default_key[] = {
194 0x2c, 0xc6, 0x81, 0xd1,
195 0x5b, 0xdb, 0xf4, 0xf7,
196 0xfc, 0xa2, 0x83, 0x19,
197 0xdb, 0x1a, 0x3e, 0x94,
198 0x6b, 0x9e, 0x38, 0xd9,
199 0x2c, 0x9c, 0x03, 0xd1,
200 0xad, 0x99, 0x44, 0xa7,
201 0xd9, 0x56, 0x3d, 0x59,
202 0x06, 0x3c, 0x25, 0xf3,
203 0xfc, 0x1f, 0xdc, 0x2a,
206 /* Length of the default RSS hash key. */
207 const size_t rss_hash_default_key_len = sizeof(rss_hash_default_key);
210 * Populate flow steering rule for a given hash RX queue type using
211 * information from hash_rxq_init[]. Nothing is written to flow_attr when
212 * flow_attr_size is not large enough, but the required size is still returned.
215 * Pointer to private structure.
216 * @param[out] flow_attr
217 * Pointer to flow attribute structure to fill. Note that the allocated
218 * area must be larger and large enough to hold all flow specifications.
219 * @param flow_attr_size
220 * Entire size of flow_attr and trailing room for flow specifications.
222 * Hash RX queue type to use for flow steering rule.
225 * Total size of the flow attribute buffer. No errors are defined.
228 priv_flow_attr(struct priv *priv, struct ibv_exp_flow_attr *flow_attr,
229 size_t flow_attr_size, enum hash_rxq_type type)
231 size_t offset = sizeof(*flow_attr);
232 const struct hash_rxq_init *init = &hash_rxq_init[type];
234 assert(priv != NULL);
235 assert((size_t)type < RTE_DIM(hash_rxq_init));
237 offset += init->flow_spec.hdr.size;
238 init = init->underlayer;
239 } while (init != NULL);
240 if (offset > flow_attr_size)
242 flow_attr_size = offset;
243 init = &hash_rxq_init[type];
244 *flow_attr = (struct ibv_exp_flow_attr){
245 .type = IBV_EXP_FLOW_ATTR_NORMAL,
246 #ifdef MLX5_FDIR_SUPPORT
247 /* Priorities < 3 are reserved for flow director. */
248 .priority = init->flow_priority + 3,
249 #else /* MLX5_FDIR_SUPPORT */
250 .priority = init->flow_priority,
251 #endif /* MLX5_FDIR_SUPPORT */
257 offset -= init->flow_spec.hdr.size;
258 memcpy((void *)((uintptr_t)flow_attr + offset),
260 init->flow_spec.hdr.size);
261 ++flow_attr->num_of_specs;
262 init = init->underlayer;
263 } while (init != NULL);
264 return flow_attr_size;
268 * Convert hash type position in indirection table initializer to
269 * hash RX queue type.
272 * Indirection table initializer.
274 * Hash type position.
277 * Hash RX queue type.
279 static enum hash_rxq_type
280 hash_rxq_type_from_pos(const struct ind_table_init *table, unsigned int pos)
282 enum hash_rxq_type type = 0;
284 assert(pos < table->hash_types_n);
286 if ((table->hash_types & (1 << type)) && (pos-- == 0))
294 * Filter out disabled hash RX queue types from ind_table_init[].
297 * Pointer to private structure.
302 * Number of table entries.
305 priv_make_ind_table_init(struct priv *priv,
306 struct ind_table_init (*table)[IND_TABLE_INIT_N])
311 unsigned int table_n = 0;
312 /* Mandatory to receive frames not handled by normal hash RX queues. */
313 unsigned int hash_types_sup = 1 << HASH_RXQ_ETH;
315 rss_hf = priv->rss_hf;
316 /* Process other protocols only if more than one queue. */
317 if (priv->rxqs_n > 1)
318 for (i = 0; (i != hash_rxq_init_n); ++i)
319 if (rss_hf & hash_rxq_init[i].dpdk_rss_hf)
320 hash_types_sup |= (1 << i);
322 /* Filter out entries whose protocols are not in the set. */
323 for (i = 0, j = 0; (i != IND_TABLE_INIT_N); ++i) {
327 /* j is increased only if the table has valid protocols. */
329 (*table)[j] = ind_table_init[i];
330 (*table)[j].hash_types &= hash_types_sup;
331 for (h = 0, nb = 0; (h != hash_rxq_init_n); ++h)
332 if (((*table)[j].hash_types >> h) & 0x1)
334 (*table)[i].hash_types_n = nb;
344 * Initialize hash RX queues and indirection table.
347 * Pointer to private structure.
350 * 0 on success, errno value on failure.
353 priv_create_hash_rxqs(struct priv *priv)
355 struct ibv_exp_wq *wqs[priv->reta_idx_n];
356 struct ind_table_init ind_table_init[IND_TABLE_INIT_N];
357 unsigned int ind_tables_n =
358 priv_make_ind_table_init(priv, &ind_table_init);
359 unsigned int hash_rxqs_n = 0;
360 struct hash_rxq (*hash_rxqs)[] = NULL;
361 struct ibv_exp_rwq_ind_table *(*ind_tables)[] = NULL;
367 assert(priv->ind_tables == NULL);
368 assert(priv->ind_tables_n == 0);
369 assert(priv->hash_rxqs == NULL);
370 assert(priv->hash_rxqs_n == 0);
371 assert(priv->pd != NULL);
372 assert(priv->ctx != NULL);
373 if (priv->rxqs_n == 0)
375 assert(priv->rxqs != NULL);
376 if (ind_tables_n == 0) {
377 ERROR("all hash RX queue types have been filtered out,"
378 " indirection table cannot be created");
381 if (priv->rxqs_n & (priv->rxqs_n - 1)) {
382 INFO("%u RX queues are configured, consider rounding this"
383 " number to the next power of two for better balancing",
385 DEBUG("indirection table extended to assume %u WQs",
388 for (i = 0; (i != priv->reta_idx_n); ++i)
389 wqs[i] = (*priv->rxqs)[(*priv->reta_idx)[i]]->wq;
390 /* Get number of hash RX queues to configure. */
391 for (i = 0, hash_rxqs_n = 0; (i != ind_tables_n); ++i)
392 hash_rxqs_n += ind_table_init[i].hash_types_n;
393 DEBUG("allocating %u hash RX queues for %u WQs, %u indirection tables",
394 hash_rxqs_n, priv->rxqs_n, ind_tables_n);
395 /* Create indirection tables. */
396 ind_tables = rte_calloc(__func__, ind_tables_n,
397 sizeof((*ind_tables)[0]), 0);
398 if (ind_tables == NULL) {
400 ERROR("cannot allocate indirection tables container: %s",
404 for (i = 0; (i != ind_tables_n); ++i) {
405 struct ibv_exp_rwq_ind_table_init_attr ind_init_attr = {
407 .log_ind_tbl_size = 0, /* Set below. */
411 unsigned int ind_tbl_size = ind_table_init[i].max_size;
412 struct ibv_exp_rwq_ind_table *ind_table;
414 if (priv->reta_idx_n < ind_tbl_size)
415 ind_tbl_size = priv->reta_idx_n;
416 ind_init_attr.log_ind_tbl_size = log2above(ind_tbl_size);
418 ind_table = ibv_exp_create_rwq_ind_table(priv->ctx,
420 if (ind_table != NULL) {
421 (*ind_tables)[i] = ind_table;
424 /* Not clear whether errno is set. */
425 err = (errno ? errno : EINVAL);
426 ERROR("RX indirection table creation failed with error %d: %s",
430 /* Allocate array that holds hash RX queues and related data. */
431 hash_rxqs = rte_calloc(__func__, hash_rxqs_n,
432 sizeof((*hash_rxqs)[0]), 0);
433 if (hash_rxqs == NULL) {
435 ERROR("cannot allocate hash RX queues container: %s",
439 for (i = 0, j = 0, k = 0;
440 ((i != hash_rxqs_n) && (j != ind_tables_n));
442 struct hash_rxq *hash_rxq = &(*hash_rxqs)[i];
443 enum hash_rxq_type type =
444 hash_rxq_type_from_pos(&ind_table_init[j], k);
445 struct rte_eth_rss_conf *priv_rss_conf =
446 (*priv->rss_conf)[type];
447 struct ibv_exp_rx_hash_conf hash_conf = {
448 .rx_hash_function = IBV_EXP_RX_HASH_FUNC_TOEPLITZ,
449 .rx_hash_key_len = (priv_rss_conf ?
450 priv_rss_conf->rss_key_len :
451 rss_hash_default_key_len),
452 .rx_hash_key = (priv_rss_conf ?
453 priv_rss_conf->rss_key :
454 rss_hash_default_key),
455 .rx_hash_fields_mask = hash_rxq_init[type].hash_fields,
456 .rwq_ind_tbl = (*ind_tables)[j],
458 struct ibv_exp_qp_init_attr qp_init_attr = {
459 .max_inl_recv = 0, /* Currently not supported. */
460 .qp_type = IBV_QPT_RAW_PACKET,
461 .comp_mask = (IBV_EXP_QP_INIT_ATTR_PD |
462 IBV_EXP_QP_INIT_ATTR_RX_HASH),
464 .rx_hash_conf = &hash_conf,
465 .port_num = priv->port,
468 DEBUG("using indirection table %u for hash RX queue %u type %d",
470 *hash_rxq = (struct hash_rxq){
472 .qp = ibv_exp_create_qp(priv->ctx, &qp_init_attr),
475 if (hash_rxq->qp == NULL) {
476 err = (errno ? errno : EINVAL);
477 ERROR("Hash RX QP creation failure: %s",
481 if (++k < ind_table_init[j].hash_types_n)
483 /* Switch to the next indirection table and reset hash RX
484 * queue type array index. */
488 priv->ind_tables = ind_tables;
489 priv->ind_tables_n = ind_tables_n;
490 priv->hash_rxqs = hash_rxqs;
491 priv->hash_rxqs_n = hash_rxqs_n;
495 if (hash_rxqs != NULL) {
496 for (i = 0; (i != hash_rxqs_n); ++i) {
497 struct ibv_qp *qp = (*hash_rxqs)[i].qp;
501 claim_zero(ibv_destroy_qp(qp));
505 if (ind_tables != NULL) {
506 for (j = 0; (j != ind_tables_n); ++j) {
507 struct ibv_exp_rwq_ind_table *ind_table =
510 if (ind_table == NULL)
512 claim_zero(ibv_exp_destroy_rwq_ind_table(ind_table));
514 rte_free(ind_tables);
520 * Clean up hash RX queues and indirection table.
523 * Pointer to private structure.
526 priv_destroy_hash_rxqs(struct priv *priv)
530 DEBUG("destroying %u hash RX queues", priv->hash_rxqs_n);
531 if (priv->hash_rxqs_n == 0) {
532 assert(priv->hash_rxqs == NULL);
533 assert(priv->ind_tables == NULL);
536 for (i = 0; (i != priv->hash_rxqs_n); ++i) {
537 struct hash_rxq *hash_rxq = &(*priv->hash_rxqs)[i];
540 assert(hash_rxq->priv == priv);
541 assert(hash_rxq->qp != NULL);
542 /* Also check that there are no remaining flows. */
543 for (j = 0; (j != RTE_DIM(hash_rxq->special_flow)); ++j)
545 (k != RTE_DIM(hash_rxq->special_flow[j]));
547 assert(hash_rxq->special_flow[j][k] == NULL);
548 for (j = 0; (j != RTE_DIM(hash_rxq->mac_flow)); ++j)
549 for (k = 0; (k != RTE_DIM(hash_rxq->mac_flow[j])); ++k)
550 assert(hash_rxq->mac_flow[j][k] == NULL);
551 claim_zero(ibv_destroy_qp(hash_rxq->qp));
553 priv->hash_rxqs_n = 0;
554 rte_free(priv->hash_rxqs);
555 priv->hash_rxqs = NULL;
556 for (i = 0; (i != priv->ind_tables_n); ++i) {
557 struct ibv_exp_rwq_ind_table *ind_table =
558 (*priv->ind_tables)[i];
560 assert(ind_table != NULL);
561 claim_zero(ibv_exp_destroy_rwq_ind_table(ind_table));
563 priv->ind_tables_n = 0;
564 rte_free(priv->ind_tables);
565 priv->ind_tables = NULL;
569 * Check whether a given flow type is allowed.
572 * Pointer to private structure.
574 * Flow type to check.
577 * Nonzero if the given flow type is allowed.
580 priv_allow_flow_type(struct priv *priv, enum hash_rxq_flow_type type)
582 /* Only FLOW_TYPE_PROMISC is allowed when promiscuous mode
583 * has been requested. */
584 if (priv->promisc_req)
585 return type == HASH_RXQ_FLOW_TYPE_PROMISC;
587 case HASH_RXQ_FLOW_TYPE_PROMISC:
588 return !!priv->promisc_req;
589 case HASH_RXQ_FLOW_TYPE_ALLMULTI:
590 return !!priv->allmulti_req;
591 case HASH_RXQ_FLOW_TYPE_BROADCAST:
592 #ifdef HAVE_FLOW_SPEC_IPV6
593 case HASH_RXQ_FLOW_TYPE_IPV6MULTI:
594 #endif /* HAVE_FLOW_SPEC_IPV6 */
595 /* If allmulti is enabled, broadcast and ipv6multi
596 * are unnecessary. */
597 return !priv->allmulti_req;
598 case HASH_RXQ_FLOW_TYPE_MAC:
601 /* Unsupported flow type is not allowed. */
608 * Automatically enable/disable flows according to configuration.
614 * 0 on success, errno value on failure.
617 priv_rehash_flows(struct priv *priv)
621 for (i = 0; (i != RTE_DIM((*priv->hash_rxqs)[0].special_flow)); ++i)
622 if (!priv_allow_flow_type(priv, i)) {
623 priv_special_flow_disable(priv, i);
625 int ret = priv_special_flow_enable(priv, i);
630 if (priv_allow_flow_type(priv, HASH_RXQ_FLOW_TYPE_MAC))
631 return priv_mac_addrs_enable(priv);
632 priv_mac_addrs_disable(priv);
637 * Allocate RX queue elements with scattered packets support.
640 * Pointer to RX queue structure.
642 * Number of elements to allocate.
644 * If not NULL, fetch buffers from this array instead of allocating them
645 * with rte_pktmbuf_alloc().
648 * 0 on success, errno value on failure.
651 rxq_alloc_elts_sp(struct rxq *rxq, unsigned int elts_n,
652 struct rte_mbuf **pool)
655 struct rxq_elt_sp (*elts)[elts_n] =
656 rte_calloc_socket("RXQ elements", 1, sizeof(*elts), 0,
661 ERROR("%p: can't allocate packets array", (void *)rxq);
665 /* For each WR (packet). */
666 for (i = 0; (i != elts_n); ++i) {
668 struct rxq_elt_sp *elt = &(*elts)[i];
669 struct ibv_sge (*sges)[RTE_DIM(elt->sges)] = &elt->sges;
671 /* These two arrays must have the same size. */
672 assert(RTE_DIM(elt->sges) == RTE_DIM(elt->bufs));
673 /* For each SGE (segment). */
674 for (j = 0; (j != RTE_DIM(elt->bufs)); ++j) {
675 struct ibv_sge *sge = &(*sges)[j];
676 struct rte_mbuf *buf;
681 rte_pktmbuf_reset(buf);
683 buf = rte_pktmbuf_alloc(rxq->mp);
685 assert(pool == NULL);
686 ERROR("%p: empty mbuf pool", (void *)rxq);
691 /* Headroom is reserved by rte_pktmbuf_alloc(). */
692 assert(DATA_OFF(buf) == RTE_PKTMBUF_HEADROOM);
693 /* Buffer is supposed to be empty. */
694 assert(rte_pktmbuf_data_len(buf) == 0);
695 assert(rte_pktmbuf_pkt_len(buf) == 0);
696 /* sge->addr must be able to store a pointer. */
697 assert(sizeof(sge->addr) >= sizeof(uintptr_t));
699 /* The first SGE keeps its headroom. */
700 sge->addr = rte_pktmbuf_mtod(buf, uintptr_t);
701 sge->length = (buf->buf_len -
702 RTE_PKTMBUF_HEADROOM);
704 /* Subsequent SGEs lose theirs. */
705 assert(DATA_OFF(buf) == RTE_PKTMBUF_HEADROOM);
706 SET_DATA_OFF(buf, 0);
707 sge->addr = (uintptr_t)buf->buf_addr;
708 sge->length = buf->buf_len;
710 sge->lkey = rxq->mr->lkey;
711 /* Redundant check for tailroom. */
712 assert(sge->length == rte_pktmbuf_tailroom(buf));
715 DEBUG("%p: allocated and configured %u WRs (%zu segments)",
716 (void *)rxq, elts_n, (elts_n * RTE_DIM((*elts)[0].sges)));
717 rxq->elts_n = elts_n;
724 assert(pool == NULL);
725 for (i = 0; (i != RTE_DIM(*elts)); ++i) {
727 struct rxq_elt_sp *elt = &(*elts)[i];
729 for (j = 0; (j != RTE_DIM(elt->bufs)); ++j) {
730 struct rte_mbuf *buf = elt->bufs[j];
733 rte_pktmbuf_free_seg(buf);
738 DEBUG("%p: failed, freed everything", (void *)rxq);
744 * Free RX queue elements with scattered packets support.
747 * Pointer to RX queue structure.
750 rxq_free_elts_sp(struct rxq *rxq)
753 unsigned int elts_n = rxq->elts_n;
754 struct rxq_elt_sp (*elts)[elts_n] = rxq->elts.sp;
756 DEBUG("%p: freeing WRs", (void *)rxq);
761 for (i = 0; (i != RTE_DIM(*elts)); ++i) {
763 struct rxq_elt_sp *elt = &(*elts)[i];
765 for (j = 0; (j != RTE_DIM(elt->bufs)); ++j) {
766 struct rte_mbuf *buf = elt->bufs[j];
769 rte_pktmbuf_free_seg(buf);
776 * Allocate RX queue elements.
779 * Pointer to RX queue structure.
781 * Number of elements to allocate.
783 * If not NULL, fetch buffers from this array instead of allocating them
784 * with rte_pktmbuf_alloc().
787 * 0 on success, errno value on failure.
790 rxq_alloc_elts(struct rxq *rxq, unsigned int elts_n, struct rte_mbuf **pool)
793 struct rxq_elt (*elts)[elts_n] =
794 rte_calloc_socket("RXQ elements", 1, sizeof(*elts), 0,
799 ERROR("%p: can't allocate packets array", (void *)rxq);
803 /* For each WR (packet). */
804 for (i = 0; (i != elts_n); ++i) {
805 struct rxq_elt *elt = &(*elts)[i];
806 struct ibv_sge *sge = &(*elts)[i].sge;
807 struct rte_mbuf *buf;
812 rte_pktmbuf_reset(buf);
814 buf = rte_pktmbuf_alloc(rxq->mp);
816 assert(pool == NULL);
817 ERROR("%p: empty mbuf pool", (void *)rxq);
822 /* Headroom is reserved by rte_pktmbuf_alloc(). */
823 assert(DATA_OFF(buf) == RTE_PKTMBUF_HEADROOM);
824 /* Buffer is supposed to be empty. */
825 assert(rte_pktmbuf_data_len(buf) == 0);
826 assert(rte_pktmbuf_pkt_len(buf) == 0);
827 /* sge->addr must be able to store a pointer. */
828 assert(sizeof(sge->addr) >= sizeof(uintptr_t));
829 /* SGE keeps its headroom. */
830 sge->addr = (uintptr_t)
831 ((uint8_t *)buf->buf_addr + RTE_PKTMBUF_HEADROOM);
832 sge->length = (buf->buf_len - RTE_PKTMBUF_HEADROOM);
833 sge->lkey = rxq->mr->lkey;
834 /* Redundant check for tailroom. */
835 assert(sge->length == rte_pktmbuf_tailroom(buf));
837 DEBUG("%p: allocated and configured %u single-segment WRs",
838 (void *)rxq, elts_n);
839 rxq->elts_n = elts_n;
841 rxq->elts.no_sp = elts;
846 assert(pool == NULL);
847 for (i = 0; (i != RTE_DIM(*elts)); ++i) {
848 struct rxq_elt *elt = &(*elts)[i];
849 struct rte_mbuf *buf = elt->buf;
852 rte_pktmbuf_free_seg(buf);
856 DEBUG("%p: failed, freed everything", (void *)rxq);
862 * Free RX queue elements.
865 * Pointer to RX queue structure.
868 rxq_free_elts(struct rxq *rxq)
871 unsigned int elts_n = rxq->elts_n;
872 struct rxq_elt (*elts)[elts_n] = rxq->elts.no_sp;
874 DEBUG("%p: freeing WRs", (void *)rxq);
876 rxq->elts.no_sp = NULL;
879 for (i = 0; (i != RTE_DIM(*elts)); ++i) {
880 struct rxq_elt *elt = &(*elts)[i];
881 struct rte_mbuf *buf = elt->buf;
884 rte_pktmbuf_free_seg(buf);
890 * Clean up a RX queue.
892 * Destroy objects, free allocated memory and reset the structure for reuse.
895 * Pointer to RX queue structure.
898 rxq_cleanup(struct rxq *rxq)
900 struct ibv_exp_release_intf_params params;
902 DEBUG("cleaning up %p", (void *)rxq);
904 rxq_free_elts_sp(rxq);
909 if (rxq->if_wq != NULL) {
910 assert(rxq->priv != NULL);
911 assert(rxq->priv->ctx != NULL);
912 assert(rxq->wq != NULL);
913 params = (struct ibv_exp_release_intf_params){
916 claim_zero(ibv_exp_release_intf(rxq->priv->ctx,
920 if (rxq->if_cq != NULL) {
921 assert(rxq->priv != NULL);
922 assert(rxq->priv->ctx != NULL);
923 assert(rxq->cq != NULL);
924 params = (struct ibv_exp_release_intf_params){
927 claim_zero(ibv_exp_release_intf(rxq->priv->ctx,
932 claim_zero(ibv_exp_destroy_wq(rxq->wq));
934 claim_zero(ibv_destroy_cq(rxq->cq));
935 if (rxq->rd != NULL) {
936 struct ibv_exp_destroy_res_domain_attr attr = {
940 assert(rxq->priv != NULL);
941 assert(rxq->priv->ctx != NULL);
942 claim_zero(ibv_exp_destroy_res_domain(rxq->priv->ctx,
947 claim_zero(ibv_dereg_mr(rxq->mr));
948 memset(rxq, 0, sizeof(*rxq));
952 * Reconfigure a RX queue with new parameters.
954 * rxq_rehash() does not allocate mbufs, which, if not done from the right
955 * thread (such as a control thread), may corrupt the pool.
956 * In case of failure, the queue is left untouched.
959 * Pointer to Ethernet device structure.
964 * 0 on success, errno value on failure.
967 rxq_rehash(struct rte_eth_dev *dev, struct rxq *rxq)
969 struct priv *priv = rxq->priv;
970 struct rxq tmpl = *rxq;
973 struct rte_mbuf **pool;
975 struct ibv_exp_wq_attr mod;
978 DEBUG("%p: rehashing queue %p", (void *)dev, (void *)rxq);
979 /* Number of descriptors and mbufs currently allocated. */
980 desc_n = (tmpl.elts_n * (tmpl.sp ? MLX5_PMD_SGE_WR_N : 1));
982 /* Toggle RX checksum offload if hardware supports it. */
984 tmpl.csum = !!dev->data->dev_conf.rxmode.hw_ip_checksum;
985 rxq->csum = tmpl.csum;
987 if (priv->hw_csum_l2tun) {
988 tmpl.csum_l2tun = !!dev->data->dev_conf.rxmode.hw_ip_checksum;
989 rxq->csum_l2tun = tmpl.csum_l2tun;
991 /* Enable scattered packets support for this queue if necessary. */
992 if ((dev->data->dev_conf.rxmode.jumbo_frame) &&
993 (dev->data->dev_conf.rxmode.max_rx_pkt_len >
994 (tmpl.mb_len - RTE_PKTMBUF_HEADROOM))) {
996 desc_n /= MLX5_PMD_SGE_WR_N;
999 DEBUG("%p: %s scattered packets support (%u WRs)",
1000 (void *)dev, (tmpl.sp ? "enabling" : "disabling"), desc_n);
1001 /* If scatter mode is the same as before, nothing to do. */
1002 if (tmpl.sp == rxq->sp) {
1003 DEBUG("%p: nothing to do", (void *)dev);
1006 /* From now on, any failure will render the queue unusable.
1007 * Reinitialize WQ. */
1008 mod = (struct ibv_exp_wq_attr){
1009 .attr_mask = IBV_EXP_WQ_ATTR_STATE,
1010 .wq_state = IBV_EXP_WQS_RESET,
1012 err = ibv_exp_modify_wq(tmpl.wq, &mod);
1014 ERROR("%p: cannot reset WQ: %s", (void *)dev, strerror(err));
1018 /* Allocate pool. */
1019 pool = rte_malloc(__func__, (mbuf_n * sizeof(*pool)), 0);
1021 ERROR("%p: cannot allocate memory", (void *)dev);
1024 /* Snatch mbufs from original queue. */
1027 struct rxq_elt_sp (*elts)[rxq->elts_n] = rxq->elts.sp;
1029 for (i = 0; (i != RTE_DIM(*elts)); ++i) {
1030 struct rxq_elt_sp *elt = &(*elts)[i];
1033 for (j = 0; (j != RTE_DIM(elt->bufs)); ++j) {
1034 assert(elt->bufs[j] != NULL);
1035 pool[k++] = elt->bufs[j];
1039 struct rxq_elt (*elts)[rxq->elts_n] = rxq->elts.no_sp;
1041 for (i = 0; (i != RTE_DIM(*elts)); ++i) {
1042 struct rxq_elt *elt = &(*elts)[i];
1043 struct rte_mbuf *buf = elt->buf;
1048 assert(k == mbuf_n);
1050 tmpl.elts.sp = NULL;
1051 assert((void *)&tmpl.elts.sp == (void *)&tmpl.elts.no_sp);
1053 rxq_alloc_elts_sp(&tmpl, desc_n, pool) :
1054 rxq_alloc_elts(&tmpl, desc_n, pool));
1056 ERROR("%p: cannot reallocate WRs, aborting", (void *)dev);
1061 assert(tmpl.elts_n == desc_n);
1062 assert(tmpl.elts.sp != NULL);
1064 /* Clean up original data. */
1066 rte_free(rxq->elts.sp);
1067 rxq->elts.sp = NULL;
1068 /* Change queue state to ready. */
1069 mod = (struct ibv_exp_wq_attr){
1070 .attr_mask = IBV_EXP_WQ_ATTR_STATE,
1071 .wq_state = IBV_EXP_WQS_RDY,
1073 err = ibv_exp_modify_wq(tmpl.wq, &mod);
1075 ERROR("%p: WQ state to IBV_EXP_WQS_RDY failed: %s",
1076 (void *)dev, strerror(err));
1080 assert(tmpl.if_wq != NULL);
1082 struct rxq_elt_sp (*elts)[tmpl.elts_n] = tmpl.elts.sp;
1084 for (i = 0; (i != RTE_DIM(*elts)); ++i) {
1085 err = tmpl.if_wq->recv_sg_list
1088 RTE_DIM((*elts)[i].sges));
1093 struct rxq_elt (*elts)[tmpl.elts_n] = tmpl.elts.no_sp;
1095 for (i = 0; (i != RTE_DIM(*elts)); ++i) {
1096 err = tmpl.if_wq->recv_burst(
1105 ERROR("%p: failed to post SGEs with error %d",
1107 /* Set err because it does not contain a valid errno value. */
1112 tmpl.recv = tmpl.if_wq->recv_sg_list;
1114 tmpl.recv = tmpl.if_wq->recv_burst;
1122 * Configure a RX queue.
1125 * Pointer to Ethernet device structure.
1127 * Pointer to RX queue structure.
1129 * Number of descriptors to configure in queue.
1131 * NUMA socket on which memory must be allocated.
1133 * Thresholds parameters.
1135 * Memory pool for buffer allocations.
1138 * 0 on success, errno value on failure.
1141 rxq_setup(struct rte_eth_dev *dev, struct rxq *rxq, uint16_t desc,
1142 unsigned int socket, const struct rte_eth_rxconf *conf,
1143 struct rte_mempool *mp)
1145 struct priv *priv = dev->data->dev_private;
1151 struct ibv_exp_wq_attr mod;
1153 struct ibv_exp_query_intf_params params;
1154 struct ibv_exp_cq_init_attr cq;
1155 struct ibv_exp_res_domain_init_attr rd;
1156 struct ibv_exp_wq_init_attr wq;
1158 enum ibv_exp_query_intf_status status;
1159 struct rte_mbuf *buf;
1162 unsigned int cq_size = desc;
1164 (void)conf; /* Thresholds configuration (ignored). */
1165 if ((desc == 0) || (desc % MLX5_PMD_SGE_WR_N)) {
1166 ERROR("%p: invalid number of RX descriptors (must be a"
1167 " multiple of %d)", (void *)dev, MLX5_PMD_SGE_WR_N);
1170 /* Get mbuf length. */
1171 buf = rte_pktmbuf_alloc(mp);
1173 ERROR("%p: unable to allocate mbuf", (void *)dev);
1176 tmpl.mb_len = buf->buf_len;
1177 assert((rte_pktmbuf_headroom(buf) +
1178 rte_pktmbuf_tailroom(buf)) == tmpl.mb_len);
1179 assert(rte_pktmbuf_headroom(buf) == RTE_PKTMBUF_HEADROOM);
1180 rte_pktmbuf_free(buf);
1181 /* Toggle RX checksum offload if hardware supports it. */
1183 tmpl.csum = !!dev->data->dev_conf.rxmode.hw_ip_checksum;
1184 if (priv->hw_csum_l2tun)
1185 tmpl.csum_l2tun = !!dev->data->dev_conf.rxmode.hw_ip_checksum;
1186 /* Enable scattered packets support for this queue if necessary. */
1187 if ((dev->data->dev_conf.rxmode.jumbo_frame) &&
1188 (dev->data->dev_conf.rxmode.max_rx_pkt_len >
1189 (tmpl.mb_len - RTE_PKTMBUF_HEADROOM))) {
1191 desc /= MLX5_PMD_SGE_WR_N;
1193 DEBUG("%p: %s scattered packets support (%u WRs)",
1194 (void *)dev, (tmpl.sp ? "enabling" : "disabling"), desc);
1195 /* Use the entire RX mempool as the memory region. */
1196 tmpl.mr = mlx5_mp2mr(priv->pd, mp);
1197 if (tmpl.mr == NULL) {
1199 ERROR("%p: MR creation failure: %s",
1200 (void *)dev, strerror(ret));
1203 attr.rd = (struct ibv_exp_res_domain_init_attr){
1204 .comp_mask = (IBV_EXP_RES_DOMAIN_THREAD_MODEL |
1205 IBV_EXP_RES_DOMAIN_MSG_MODEL),
1206 .thread_model = IBV_EXP_THREAD_SINGLE,
1207 .msg_model = IBV_EXP_MSG_HIGH_BW,
1209 tmpl.rd = ibv_exp_create_res_domain(priv->ctx, &attr.rd);
1210 if (tmpl.rd == NULL) {
1212 ERROR("%p: RD creation failure: %s",
1213 (void *)dev, strerror(ret));
1216 attr.cq = (struct ibv_exp_cq_init_attr){
1217 .comp_mask = IBV_EXP_CQ_INIT_ATTR_RES_DOMAIN,
1218 .res_domain = tmpl.rd,
1220 tmpl.cq = ibv_exp_create_cq(priv->ctx, cq_size, NULL, NULL, 0,
1222 if (tmpl.cq == NULL) {
1224 ERROR("%p: CQ creation failure: %s",
1225 (void *)dev, strerror(ret));
1228 DEBUG("priv->device_attr.max_qp_wr is %d",
1229 priv->device_attr.max_qp_wr);
1230 DEBUG("priv->device_attr.max_sge is %d",
1231 priv->device_attr.max_sge);
1232 /* Configure VLAN stripping. */
1233 tmpl.vlan_strip = dev->data->dev_conf.rxmode.hw_vlan_strip;
1234 attr.wq = (struct ibv_exp_wq_init_attr){
1235 .wq_context = NULL, /* Could be useful in the future. */
1236 .wq_type = IBV_EXP_WQT_RQ,
1237 /* Max number of outstanding WRs. */
1238 .max_recv_wr = ((priv->device_attr.max_qp_wr < (int)cq_size) ?
1239 priv->device_attr.max_qp_wr :
1241 /* Max number of scatter/gather elements in a WR. */
1242 .max_recv_sge = ((priv->device_attr.max_sge <
1243 MLX5_PMD_SGE_WR_N) ?
1244 priv->device_attr.max_sge :
1249 IBV_EXP_CREATE_WQ_RES_DOMAIN |
1250 #ifdef HAVE_EXP_DEVICE_ATTR_VLAN_OFFLOADS
1251 IBV_EXP_CREATE_WQ_VLAN_OFFLOADS |
1252 #endif /* HAVE_EXP_DEVICE_ATTR_VLAN_OFFLOADS */
1254 .res_domain = tmpl.rd,
1255 #ifdef HAVE_EXP_DEVICE_ATTR_VLAN_OFFLOADS
1256 .vlan_offloads = (tmpl.vlan_strip ?
1257 IBV_EXP_RECEIVE_WQ_CVLAN_STRIP :
1259 #endif /* HAVE_EXP_DEVICE_ATTR_VLAN_OFFLOADS */
1262 #ifdef HAVE_VERBS_FCS
1263 /* By default, FCS (CRC) is stripped by hardware. */
1264 if (dev->data->dev_conf.rxmode.hw_strip_crc) {
1265 tmpl.crc_present = 0;
1266 } else if (priv->hw_fcs_strip) {
1267 /* Ask HW/Verbs to leave CRC in place when supported. */
1268 attr.wq.flags |= IBV_EXP_CREATE_WQ_FLAG_SCATTER_FCS;
1269 attr.wq.comp_mask |= IBV_EXP_CREATE_WQ_FLAGS;
1270 tmpl.crc_present = 1;
1272 WARN("%p: CRC stripping has been disabled but will still"
1273 " be performed by hardware, make sure MLNX_OFED and"
1274 " firmware are up to date",
1276 tmpl.crc_present = 0;
1278 DEBUG("%p: CRC stripping is %s, %u bytes will be subtracted from"
1279 " incoming frames to hide it",
1281 tmpl.crc_present ? "disabled" : "enabled",
1282 tmpl.crc_present << 2);
1283 #endif /* HAVE_VERBS_FCS */
1285 #ifdef HAVE_VERBS_RX_END_PADDING
1286 if (!mlx5_getenv_int("MLX5_PMD_ENABLE_PADDING"))
1287 ; /* Nothing else to do. */
1288 else if (priv->hw_padding) {
1289 INFO("%p: enabling packet padding on queue %p",
1290 (void *)dev, (void *)rxq);
1291 attr.wq.flags |= IBV_EXP_CREATE_WQ_FLAG_RX_END_PADDING;
1292 attr.wq.comp_mask |= IBV_EXP_CREATE_WQ_FLAGS;
1294 WARN("%p: packet padding has been requested but is not"
1295 " supported, make sure MLNX_OFED and firmware are"
1298 #endif /* HAVE_VERBS_RX_END_PADDING */
1300 tmpl.wq = ibv_exp_create_wq(priv->ctx, &attr.wq);
1301 if (tmpl.wq == NULL) {
1302 ret = (errno ? errno : EINVAL);
1303 ERROR("%p: WQ creation failure: %s",
1304 (void *)dev, strerror(ret));
1308 ret = rxq_alloc_elts_sp(&tmpl, desc, NULL);
1310 ret = rxq_alloc_elts(&tmpl, desc, NULL);
1312 ERROR("%p: RXQ allocation failed: %s",
1313 (void *)dev, strerror(ret));
1317 tmpl.port_id = dev->data->port_id;
1318 DEBUG("%p: RTE port ID: %u", (void *)rxq, tmpl.port_id);
1319 attr.params = (struct ibv_exp_query_intf_params){
1320 .intf_scope = IBV_EXP_INTF_GLOBAL,
1321 #ifdef HAVE_EXP_DEVICE_ATTR_VLAN_OFFLOADS
1323 #endif /* HAVE_EXP_DEVICE_ATTR_VLAN_OFFLOADS */
1324 .intf = IBV_EXP_INTF_CQ,
1327 tmpl.if_cq = ibv_exp_query_intf(priv->ctx, &attr.params, &status);
1328 if (tmpl.if_cq == NULL) {
1329 ERROR("%p: CQ interface family query failed with status %d",
1330 (void *)dev, status);
1333 attr.params = (struct ibv_exp_query_intf_params){
1334 .intf_scope = IBV_EXP_INTF_GLOBAL,
1335 .intf = IBV_EXP_INTF_WQ,
1338 tmpl.if_wq = ibv_exp_query_intf(priv->ctx, &attr.params, &status);
1339 if (tmpl.if_wq == NULL) {
1340 ERROR("%p: WQ interface family query failed with status %d",
1341 (void *)dev, status);
1344 /* Change queue state to ready. */
1345 mod = (struct ibv_exp_wq_attr){
1346 .attr_mask = IBV_EXP_WQ_ATTR_STATE,
1347 .wq_state = IBV_EXP_WQS_RDY,
1349 ret = ibv_exp_modify_wq(tmpl.wq, &mod);
1351 ERROR("%p: WQ state to IBV_EXP_WQS_RDY failed: %s",
1352 (void *)dev, strerror(ret));
1357 struct rxq_elt_sp (*elts)[tmpl.elts_n] = tmpl.elts.sp;
1359 for (i = 0; (i != RTE_DIM(*elts)); ++i) {
1360 ret = tmpl.if_wq->recv_sg_list
1363 RTE_DIM((*elts)[i].sges));
1368 struct rxq_elt (*elts)[tmpl.elts_n] = tmpl.elts.no_sp;
1370 for (i = 0; (i != RTE_DIM(*elts)); ++i) {
1371 ret = tmpl.if_wq->recv_burst(
1380 ERROR("%p: failed to post SGEs with error %d",
1382 /* Set ret because it does not contain a valid errno value. */
1386 /* Clean up rxq in case we're reinitializing it. */
1387 DEBUG("%p: cleaning-up old rxq just in case", (void *)rxq);
1390 DEBUG("%p: rxq updated with %p", (void *)rxq, (void *)&tmpl);
1392 /* Assign function in queue. */
1393 #ifdef HAVE_EXP_DEVICE_ATTR_VLAN_OFFLOADS
1394 rxq->poll = rxq->if_cq->poll_length_flags_cvlan;
1395 #else /* HAVE_EXP_DEVICE_ATTR_VLAN_OFFLOADS */
1396 rxq->poll = rxq->if_cq->poll_length_flags;
1397 #endif /* HAVE_EXP_DEVICE_ATTR_VLAN_OFFLOADS */
1399 rxq->recv = rxq->if_wq->recv_sg_list;
1401 rxq->recv = rxq->if_wq->recv_burst;
1410 * DPDK callback to configure a RX queue.
1413 * Pointer to Ethernet device structure.
1417 * Number of descriptors to configure in queue.
1419 * NUMA socket on which memory must be allocated.
1421 * Thresholds parameters.
1423 * Memory pool for buffer allocations.
1426 * 0 on success, negative errno value on failure.
1429 mlx5_rx_queue_setup(struct rte_eth_dev *dev, uint16_t idx, uint16_t desc,
1430 unsigned int socket, const struct rte_eth_rxconf *conf,
1431 struct rte_mempool *mp)
1433 struct priv *priv = dev->data->dev_private;
1434 struct rxq *rxq = (*priv->rxqs)[idx];
1437 if (mlx5_is_secondary())
1438 return -E_RTE_SECONDARY;
1441 DEBUG("%p: configuring queue %u for %u descriptors",
1442 (void *)dev, idx, desc);
1443 if (idx >= priv->rxqs_n) {
1444 ERROR("%p: queue index out of range (%u >= %u)",
1445 (void *)dev, idx, priv->rxqs_n);
1450 DEBUG("%p: reusing already allocated queue index %u (%p)",
1451 (void *)dev, idx, (void *)rxq);
1452 if (priv->started) {
1456 (*priv->rxqs)[idx] = NULL;
1459 rxq = rte_calloc_socket("RXQ", 1, sizeof(*rxq), 0, socket);
1461 ERROR("%p: unable to allocate queue index %u",
1467 ret = rxq_setup(dev, rxq, desc, socket, conf, mp);
1471 rxq->stats.idx = idx;
1472 DEBUG("%p: adding RX queue %p to list",
1473 (void *)dev, (void *)rxq);
1474 (*priv->rxqs)[idx] = rxq;
1475 /* Update receive callback. */
1477 dev->rx_pkt_burst = mlx5_rx_burst_sp;
1479 dev->rx_pkt_burst = mlx5_rx_burst;
1486 * DPDK callback to release a RX queue.
1489 * Generic RX queue pointer.
1492 mlx5_rx_queue_release(void *dpdk_rxq)
1494 struct rxq *rxq = (struct rxq *)dpdk_rxq;
1498 if (mlx5_is_secondary())
1505 for (i = 0; (i != priv->rxqs_n); ++i)
1506 if ((*priv->rxqs)[i] == rxq) {
1507 DEBUG("%p: removing RX queue %p from list",
1508 (void *)priv->dev, (void *)rxq);
1509 (*priv->rxqs)[i] = NULL;
1518 * DPDK callback for RX in secondary processes.
1520 * This function configures all queues from primary process information
1521 * if necessary before reverting to the normal RX burst callback.
1524 * Generic pointer to RX queue structure.
1526 * Array to store received packets.
1528 * Maximum number of packets in array.
1531 * Number of packets successfully received (<= pkts_n).
1534 mlx5_rx_burst_secondary_setup(void *dpdk_rxq, struct rte_mbuf **pkts,
1537 struct rxq *rxq = dpdk_rxq;
1538 struct priv *priv = mlx5_secondary_data_setup(rxq->priv);
1539 struct priv *primary_priv;
1545 mlx5_secondary_data[priv->dev->data->port_id].primary_priv;
1546 /* Look for queue index in both private structures. */
1547 for (index = 0; index != priv->rxqs_n; ++index)
1548 if (((*primary_priv->rxqs)[index] == rxq) ||
1549 ((*priv->rxqs)[index] == rxq))
1551 if (index == priv->rxqs_n)
1553 rxq = (*priv->rxqs)[index];
1554 return priv->dev->rx_pkt_burst(rxq, pkts, pkts_n);