4 * Copyright 2015 6WIND S.A.
5 * Copyright 2015 Mellanox.
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8 * modification, are permitted provided that the following conditions
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42 /* ISO C doesn't support unnamed structs/unions, disabling -pedantic. */
44 #pragma GCC diagnostic ignored "-Wpedantic"
46 #include <infiniband/verbs.h>
47 #include <infiniband/arch.h>
48 #include <infiniband/mlx5_hw.h>
50 #pragma GCC diagnostic error "-Wpedantic"
53 /* DPDK headers don't like -pedantic. */
55 #pragma GCC diagnostic ignored "-Wpedantic"
58 #include <rte_malloc.h>
59 #include <rte_ethdev.h>
60 #include <rte_common.h>
61 #include <rte_interrupts.h>
62 #include <rte_debug.h>
64 #pragma GCC diagnostic error "-Wpedantic"
68 #include "mlx5_rxtx.h"
69 #include "mlx5_utils.h"
70 #include "mlx5_autoconf.h"
71 #include "mlx5_defs.h"
73 /* Initialization data for hash RX queues. */
74 const struct hash_rxq_init hash_rxq_init[] = {
76 .hash_fields = (IBV_EXP_RX_HASH_SRC_IPV4 |
77 IBV_EXP_RX_HASH_DST_IPV4 |
78 IBV_EXP_RX_HASH_SRC_PORT_TCP |
79 IBV_EXP_RX_HASH_DST_PORT_TCP),
80 .dpdk_rss_hf = ETH_RSS_NONFRAG_IPV4_TCP,
82 .flow_spec.tcp_udp = {
83 .type = IBV_EXP_FLOW_SPEC_TCP,
84 .size = sizeof(hash_rxq_init[0].flow_spec.tcp_udp),
86 .underlayer = &hash_rxq_init[HASH_RXQ_IPV4],
89 .hash_fields = (IBV_EXP_RX_HASH_SRC_IPV4 |
90 IBV_EXP_RX_HASH_DST_IPV4 |
91 IBV_EXP_RX_HASH_SRC_PORT_UDP |
92 IBV_EXP_RX_HASH_DST_PORT_UDP),
93 .dpdk_rss_hf = ETH_RSS_NONFRAG_IPV4_UDP,
95 .flow_spec.tcp_udp = {
96 .type = IBV_EXP_FLOW_SPEC_UDP,
97 .size = sizeof(hash_rxq_init[0].flow_spec.tcp_udp),
99 .underlayer = &hash_rxq_init[HASH_RXQ_IPV4],
102 .hash_fields = (IBV_EXP_RX_HASH_SRC_IPV4 |
103 IBV_EXP_RX_HASH_DST_IPV4),
104 .dpdk_rss_hf = (ETH_RSS_IPV4 |
108 .type = IBV_EXP_FLOW_SPEC_IPV4,
109 .size = sizeof(hash_rxq_init[0].flow_spec.ipv4),
111 .underlayer = &hash_rxq_init[HASH_RXQ_ETH],
114 .hash_fields = (IBV_EXP_RX_HASH_SRC_IPV6 |
115 IBV_EXP_RX_HASH_DST_IPV6 |
116 IBV_EXP_RX_HASH_SRC_PORT_TCP |
117 IBV_EXP_RX_HASH_DST_PORT_TCP),
118 .dpdk_rss_hf = ETH_RSS_NONFRAG_IPV6_TCP,
120 .flow_spec.tcp_udp = {
121 .type = IBV_EXP_FLOW_SPEC_TCP,
122 .size = sizeof(hash_rxq_init[0].flow_spec.tcp_udp),
124 .underlayer = &hash_rxq_init[HASH_RXQ_IPV6],
127 .hash_fields = (IBV_EXP_RX_HASH_SRC_IPV6 |
128 IBV_EXP_RX_HASH_DST_IPV6 |
129 IBV_EXP_RX_HASH_SRC_PORT_UDP |
130 IBV_EXP_RX_HASH_DST_PORT_UDP),
131 .dpdk_rss_hf = ETH_RSS_NONFRAG_IPV6_UDP,
133 .flow_spec.tcp_udp = {
134 .type = IBV_EXP_FLOW_SPEC_UDP,
135 .size = sizeof(hash_rxq_init[0].flow_spec.tcp_udp),
137 .underlayer = &hash_rxq_init[HASH_RXQ_IPV6],
140 .hash_fields = (IBV_EXP_RX_HASH_SRC_IPV6 |
141 IBV_EXP_RX_HASH_DST_IPV6),
142 .dpdk_rss_hf = (ETH_RSS_IPV6 |
146 .type = IBV_EXP_FLOW_SPEC_IPV6,
147 .size = sizeof(hash_rxq_init[0].flow_spec.ipv6),
149 .underlayer = &hash_rxq_init[HASH_RXQ_ETH],
156 .type = IBV_EXP_FLOW_SPEC_ETH,
157 .size = sizeof(hash_rxq_init[0].flow_spec.eth),
163 /* Number of entries in hash_rxq_init[]. */
164 const unsigned int hash_rxq_init_n = RTE_DIM(hash_rxq_init);
166 /* Initialization data for hash RX queue indirection tables. */
167 static const struct ind_table_init ind_table_init[] = {
169 .max_size = -1u, /* Superseded by HW limitations. */
171 1 << HASH_RXQ_TCPV4 |
172 1 << HASH_RXQ_UDPV4 |
174 1 << HASH_RXQ_TCPV6 |
175 1 << HASH_RXQ_UDPV6 |
182 .hash_types = 1 << HASH_RXQ_ETH,
187 #define IND_TABLE_INIT_N RTE_DIM(ind_table_init)
189 /* Default RSS hash key also used for ConnectX-3. */
190 uint8_t rss_hash_default_key[] = {
191 0x2c, 0xc6, 0x81, 0xd1,
192 0x5b, 0xdb, 0xf4, 0xf7,
193 0xfc, 0xa2, 0x83, 0x19,
194 0xdb, 0x1a, 0x3e, 0x94,
195 0x6b, 0x9e, 0x38, 0xd9,
196 0x2c, 0x9c, 0x03, 0xd1,
197 0xad, 0x99, 0x44, 0xa7,
198 0xd9, 0x56, 0x3d, 0x59,
199 0x06, 0x3c, 0x25, 0xf3,
200 0xfc, 0x1f, 0xdc, 0x2a,
203 /* Length of the default RSS hash key. */
204 const size_t rss_hash_default_key_len = sizeof(rss_hash_default_key);
207 * Populate flow steering rule for a given hash RX queue type using
208 * information from hash_rxq_init[]. Nothing is written to flow_attr when
209 * flow_attr_size is not large enough, but the required size is still returned.
212 * Pointer to private structure.
213 * @param[out] flow_attr
214 * Pointer to flow attribute structure to fill. Note that the allocated
215 * area must be larger and large enough to hold all flow specifications.
216 * @param flow_attr_size
217 * Entire size of flow_attr and trailing room for flow specifications.
219 * Hash RX queue type to use for flow steering rule.
222 * Total size of the flow attribute buffer. No errors are defined.
225 priv_flow_attr(struct priv *priv, struct ibv_exp_flow_attr *flow_attr,
226 size_t flow_attr_size, enum hash_rxq_type type)
228 size_t offset = sizeof(*flow_attr);
229 const struct hash_rxq_init *init = &hash_rxq_init[type];
231 assert(priv != NULL);
232 assert((size_t)type < RTE_DIM(hash_rxq_init));
234 offset += init->flow_spec.hdr.size;
235 init = init->underlayer;
236 } while (init != NULL);
237 if (offset > flow_attr_size)
239 flow_attr_size = offset;
240 init = &hash_rxq_init[type];
241 *flow_attr = (struct ibv_exp_flow_attr){
242 .type = IBV_EXP_FLOW_ATTR_NORMAL,
243 /* Priorities < 3 are reserved for flow director. */
244 .priority = init->flow_priority + 3,
250 offset -= init->flow_spec.hdr.size;
251 memcpy((void *)((uintptr_t)flow_attr + offset),
253 init->flow_spec.hdr.size);
254 ++flow_attr->num_of_specs;
255 init = init->underlayer;
256 } while (init != NULL);
257 return flow_attr_size;
261 * Convert hash type position in indirection table initializer to
262 * hash RX queue type.
265 * Indirection table initializer.
267 * Hash type position.
270 * Hash RX queue type.
272 static enum hash_rxq_type
273 hash_rxq_type_from_pos(const struct ind_table_init *table, unsigned int pos)
275 enum hash_rxq_type type = HASH_RXQ_TCPV4;
277 assert(pos < table->hash_types_n);
279 if ((table->hash_types & (1 << type)) && (pos-- == 0))
287 * Filter out disabled hash RX queue types from ind_table_init[].
290 * Pointer to private structure.
295 * Number of table entries.
298 priv_make_ind_table_init(struct priv *priv,
299 struct ind_table_init (*table)[IND_TABLE_INIT_N])
304 unsigned int table_n = 0;
305 /* Mandatory to receive frames not handled by normal hash RX queues. */
306 unsigned int hash_types_sup = 1 << HASH_RXQ_ETH;
308 rss_hf = priv->rss_hf;
309 /* Process other protocols only if more than one queue. */
310 if (priv->rxqs_n > 1)
311 for (i = 0; (i != hash_rxq_init_n); ++i)
312 if (rss_hf & hash_rxq_init[i].dpdk_rss_hf)
313 hash_types_sup |= (1 << i);
315 /* Filter out entries whose protocols are not in the set. */
316 for (i = 0, j = 0; (i != IND_TABLE_INIT_N); ++i) {
320 /* j is increased only if the table has valid protocols. */
322 (*table)[j] = ind_table_init[i];
323 (*table)[j].hash_types &= hash_types_sup;
324 for (h = 0, nb = 0; (h != hash_rxq_init_n); ++h)
325 if (((*table)[j].hash_types >> h) & 0x1)
327 (*table)[i].hash_types_n = nb;
337 * Initialize hash RX queues and indirection table.
340 * Pointer to private structure.
343 * 0 on success, errno value on failure.
346 priv_create_hash_rxqs(struct priv *priv)
348 struct ibv_exp_wq *wqs[priv->reta_idx_n];
349 struct ind_table_init ind_table_init[IND_TABLE_INIT_N];
350 unsigned int ind_tables_n =
351 priv_make_ind_table_init(priv, &ind_table_init);
352 unsigned int hash_rxqs_n = 0;
353 struct hash_rxq (*hash_rxqs)[] = NULL;
354 struct ibv_exp_rwq_ind_table *(*ind_tables)[] = NULL;
360 assert(priv->ind_tables == NULL);
361 assert(priv->ind_tables_n == 0);
362 assert(priv->hash_rxqs == NULL);
363 assert(priv->hash_rxqs_n == 0);
364 assert(priv->pd != NULL);
365 assert(priv->ctx != NULL);
368 if (priv->rxqs_n == 0)
370 assert(priv->rxqs != NULL);
371 if (ind_tables_n == 0) {
372 ERROR("all hash RX queue types have been filtered out,"
373 " indirection table cannot be created");
376 if (priv->rxqs_n & (priv->rxqs_n - 1)) {
377 INFO("%u RX queues are configured, consider rounding this"
378 " number to the next power of two for better balancing",
380 DEBUG("indirection table extended to assume %u WQs",
383 for (i = 0; (i != priv->reta_idx_n); ++i) {
384 struct rxq_ctrl *rxq_ctrl;
386 rxq_ctrl = container_of((*priv->rxqs)[(*priv->reta_idx)[i]],
387 struct rxq_ctrl, rxq);
388 wqs[i] = rxq_ctrl->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 case HASH_RXQ_FLOW_TYPE_IPV6MULTI:
593 /* If allmulti is enabled, broadcast and ipv6multi
594 * are unnecessary. */
595 return !priv->allmulti_req;
596 case HASH_RXQ_FLOW_TYPE_MAC:
599 /* Unsupported flow type is not allowed. */
606 * Automatically enable/disable flows according to configuration.
612 * 0 on success, errno value on failure.
615 priv_rehash_flows(struct priv *priv)
617 enum hash_rxq_flow_type i;
619 for (i = HASH_RXQ_FLOW_TYPE_PROMISC;
620 i != RTE_DIM((*priv->hash_rxqs)[0].special_flow);
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 * Unlike regular Rx function, vPMD Rx doesn't replace mbufs immediately when
638 * receiving packets. Instead it replaces later in bulk. In rxq->elts[], entries
639 * from rq_pi to rq_ci are owned by device but the rest is already delivered to
640 * application. In order not to reuse those mbufs by rxq_alloc_elts(), this
641 * function must be called to replace used mbufs.
644 * Pointer to RX queue structure.
647 * 0 on success, errno value on failure.
650 rxq_trim_elts(struct rxq *rxq)
652 const uint16_t q_n = (1 << rxq->elts_n);
653 const uint16_t q_mask = q_n - 1;
654 uint16_t used = q_n - (rxq->rq_ci - rxq->rq_pi);
659 for (i = 0; i < used; ++i) {
660 struct rte_mbuf *buf;
661 buf = rte_pktmbuf_alloc(rxq->mp);
664 (*rxq->elts)[(rxq->rq_ci + i) & q_mask] = buf;
666 rxq->rq_pi = rxq->rq_ci;
672 * Allocate RX queue elements.
675 * Pointer to RX queue structure.
677 * Number of elements to allocate.
679 * If not NULL, fetch buffers from this array instead of allocating them
680 * with rte_pktmbuf_alloc().
683 * 0 on success, errno value on failure.
686 rxq_alloc_elts(struct rxq_ctrl *rxq_ctrl, unsigned int elts_n,
687 struct rte_mbuf *(*pool)[])
689 const unsigned int sges_n = 1 << rxq_ctrl->rxq.sges_n;
693 /* Iterate on segments. */
694 for (i = 0; (i != elts_n); ++i) {
695 struct rte_mbuf *buf;
696 volatile struct mlx5_wqe_data_seg *scat =
697 &(*rxq_ctrl->rxq.wqes)[i];
702 rte_pktmbuf_reset(buf);
703 rte_pktmbuf_refcnt_update(buf, 1);
705 buf = rte_pktmbuf_alloc(rxq_ctrl->rxq.mp);
707 assert(pool == NULL);
708 ERROR("%p: empty mbuf pool", (void *)rxq_ctrl);
712 /* Headroom is reserved by rte_pktmbuf_alloc(). */
713 assert(DATA_OFF(buf) == RTE_PKTMBUF_HEADROOM);
714 /* Buffer is supposed to be empty. */
715 assert(rte_pktmbuf_data_len(buf) == 0);
716 assert(rte_pktmbuf_pkt_len(buf) == 0);
718 /* Only the first segment keeps headroom. */
720 SET_DATA_OFF(buf, 0);
721 PORT(buf) = rxq_ctrl->rxq.port_id;
722 DATA_LEN(buf) = rte_pktmbuf_tailroom(buf);
723 PKT_LEN(buf) = DATA_LEN(buf);
725 /* scat->addr must be able to store a pointer. */
726 assert(sizeof(scat->addr) >= sizeof(uintptr_t));
727 *scat = (struct mlx5_wqe_data_seg){
728 .addr = htonll(rte_pktmbuf_mtod(buf, uintptr_t)),
729 .byte_count = htonl(DATA_LEN(buf)),
730 .lkey = htonl(rxq_ctrl->mr->lkey),
732 (*rxq_ctrl->rxq.elts)[i] = buf;
734 DEBUG("%p: allocated and configured %u segments (max %u packets)",
735 (void *)rxq_ctrl, elts_n, elts_n / (1 << rxq_ctrl->rxq.sges_n));
739 assert(pool == NULL);
741 for (i = 0; (i != elts_n); ++i) {
742 if ((*rxq_ctrl->rxq.elts)[i] != NULL)
743 rte_pktmbuf_free_seg((*rxq_ctrl->rxq.elts)[i]);
744 (*rxq_ctrl->rxq.elts)[i] = NULL;
746 DEBUG("%p: failed, freed everything", (void *)rxq_ctrl);
752 * Free RX queue elements.
755 * Pointer to RX queue structure.
758 rxq_free_elts(struct rxq_ctrl *rxq_ctrl)
762 DEBUG("%p: freeing WRs", (void *)rxq_ctrl);
763 if (rxq_ctrl->rxq.elts == NULL)
766 for (i = 0; (i != (1u << rxq_ctrl->rxq.elts_n)); ++i) {
767 if ((*rxq_ctrl->rxq.elts)[i] != NULL)
768 rte_pktmbuf_free_seg((*rxq_ctrl->rxq.elts)[i]);
769 (*rxq_ctrl->rxq.elts)[i] = NULL;
774 * Clean up a RX queue.
776 * Destroy objects, free allocated memory and reset the structure for reuse.
779 * Pointer to RX queue structure.
782 rxq_cleanup(struct rxq_ctrl *rxq_ctrl)
784 DEBUG("cleaning up %p", (void *)rxq_ctrl);
785 rxq_free_elts(rxq_ctrl);
786 if (rxq_ctrl->fdir_queue != NULL)
787 priv_fdir_queue_destroy(rxq_ctrl->priv, rxq_ctrl->fdir_queue);
788 if (rxq_ctrl->wq != NULL)
789 claim_zero(ibv_exp_destroy_wq(rxq_ctrl->wq));
790 if (rxq_ctrl->cq != NULL)
791 claim_zero(ibv_destroy_cq(rxq_ctrl->cq));
792 if (rxq_ctrl->channel != NULL)
793 claim_zero(ibv_destroy_comp_channel(rxq_ctrl->channel));
794 if (rxq_ctrl->mr != NULL)
795 claim_zero(ibv_dereg_mr(rxq_ctrl->mr));
796 memset(rxq_ctrl, 0, sizeof(*rxq_ctrl));
800 * Initialize RX queue.
803 * Pointer to RX queue control template.
806 * 0 on success, errno value on failure.
809 rxq_setup(struct rxq_ctrl *tmpl)
811 struct ibv_cq *ibcq = tmpl->cq;
812 struct ibv_mlx5_cq_info cq_info;
813 struct mlx5_rwq *rwq = container_of(tmpl->wq, struct mlx5_rwq, wq);
814 struct rte_mbuf *(*elts)[1 << tmpl->rxq.elts_n] =
815 rte_calloc_socket("RXQ", 1, sizeof(*elts), 0, tmpl->socket);
817 if (ibv_mlx5_exp_get_cq_info(ibcq, &cq_info)) {
818 ERROR("Unable to query CQ info. check your OFED.");
821 if (cq_info.cqe_size != RTE_CACHE_LINE_SIZE) {
822 ERROR("Wrong MLX5_CQE_SIZE environment variable value: "
823 "it should be set to %u", RTE_CACHE_LINE_SIZE);
828 tmpl->rxq.rq_db = rwq->rq.db;
829 tmpl->rxq.cqe_n = log2above(cq_info.cqe_cnt);
833 tmpl->rxq.cq_db = cq_info.dbrec;
835 (volatile struct mlx5_wqe_data_seg (*)[])
836 (uintptr_t)rwq->rq.buff;
838 (volatile struct mlx5_cqe (*)[])
839 (uintptr_t)cq_info.buf;
840 tmpl->rxq.elts = elts;
845 * Configure a RX queue.
848 * Pointer to Ethernet device structure.
850 * Pointer to RX queue structure.
852 * Number of descriptors to configure in queue.
854 * NUMA socket on which memory must be allocated.
856 * Thresholds parameters.
858 * Memory pool for buffer allocations.
861 * 0 on success, errno value on failure.
864 rxq_ctrl_setup(struct rte_eth_dev *dev, struct rxq_ctrl *rxq_ctrl,
865 uint16_t desc, unsigned int socket,
866 const struct rte_eth_rxconf *conf, struct rte_mempool *mp)
868 struct priv *priv = dev->data->dev_private;
869 struct rxq_ctrl tmpl = {
873 .elts_n = log2above(desc),
875 .rss_hash = priv->rxqs_n > 1,
878 struct ibv_exp_wq_attr mod;
880 struct ibv_exp_cq_init_attr cq;
881 struct ibv_exp_wq_init_attr wq;
882 struct ibv_exp_cq_attr cq_attr;
884 unsigned int mb_len = rte_pktmbuf_data_room_size(mp);
885 unsigned int cqe_n = desc - 1;
886 struct rte_mbuf *(*elts)[desc] = NULL;
889 (void)conf; /* Thresholds configuration (ignored). */
890 /* Enable scattered packets support for this queue if necessary. */
891 assert(mb_len >= RTE_PKTMBUF_HEADROOM);
892 if (dev->data->dev_conf.rxmode.max_rx_pkt_len <=
893 (mb_len - RTE_PKTMBUF_HEADROOM)) {
895 } else if (dev->data->dev_conf.rxmode.enable_scatter) {
897 RTE_PKTMBUF_HEADROOM +
898 dev->data->dev_conf.rxmode.max_rx_pkt_len;
902 * Determine the number of SGEs needed for a full packet
903 * and round it to the next power of two.
905 sges_n = log2above((size / mb_len) + !!(size % mb_len));
906 tmpl.rxq.sges_n = sges_n;
907 /* Make sure rxq.sges_n did not overflow. */
908 size = mb_len * (1 << tmpl.rxq.sges_n);
909 size -= RTE_PKTMBUF_HEADROOM;
910 if (size < dev->data->dev_conf.rxmode.max_rx_pkt_len) {
911 ERROR("%p: too many SGEs (%u) needed to handle"
912 " requested maximum packet size %u",
915 dev->data->dev_conf.rxmode.max_rx_pkt_len);
919 WARN("%p: the requested maximum Rx packet size (%u) is"
920 " larger than a single mbuf (%u) and scattered"
921 " mode has not been requested",
923 dev->data->dev_conf.rxmode.max_rx_pkt_len,
924 mb_len - RTE_PKTMBUF_HEADROOM);
926 DEBUG("%p: maximum number of segments per packet: %u",
927 (void *)dev, 1 << tmpl.rxq.sges_n);
928 if (desc % (1 << tmpl.rxq.sges_n)) {
929 ERROR("%p: number of RX queue descriptors (%u) is not a"
930 " multiple of SGEs per packet (%u)",
933 1 << tmpl.rxq.sges_n);
936 /* Toggle RX checksum offload if hardware supports it. */
938 tmpl.rxq.csum = !!dev->data->dev_conf.rxmode.hw_ip_checksum;
939 if (priv->hw_csum_l2tun)
940 tmpl.rxq.csum_l2tun =
941 !!dev->data->dev_conf.rxmode.hw_ip_checksum;
942 /* Use the entire RX mempool as the memory region. */
943 tmpl.mr = mlx5_mp2mr(priv->pd, mp);
944 if (tmpl.mr == NULL) {
946 ERROR("%p: MR creation failure: %s",
947 (void *)dev, strerror(ret));
950 if (dev->data->dev_conf.intr_conf.rxq) {
951 tmpl.channel = ibv_create_comp_channel(priv->ctx);
952 if (tmpl.channel == NULL) {
954 ERROR("%p: Rx interrupt completion channel creation"
956 (void *)dev, strerror(ret));
960 attr.cq = (struct ibv_exp_cq_init_attr){
963 if (priv->cqe_comp) {
964 attr.cq.comp_mask |= IBV_EXP_CQ_INIT_ATTR_FLAGS;
965 attr.cq.flags |= IBV_EXP_CQ_COMPRESSED_CQE;
967 * For vectorized Rx, it must not be doubled in order to
968 * make cq_ci and rq_ci aligned.
970 if (rxq_check_vec_support(&tmpl.rxq) < 0)
971 cqe_n = (desc * 2) - 1; /* Double the number of CQEs. */
973 tmpl.cq = ibv_exp_create_cq(priv->ctx, cqe_n, NULL, tmpl.channel, 0,
975 if (tmpl.cq == NULL) {
977 ERROR("%p: CQ creation failure: %s",
978 (void *)dev, strerror(ret));
981 DEBUG("priv->device_attr.max_qp_wr is %d",
982 priv->device_attr.max_qp_wr);
983 DEBUG("priv->device_attr.max_sge is %d",
984 priv->device_attr.max_sge);
985 /* Configure VLAN stripping. */
986 tmpl.rxq.vlan_strip = (priv->hw_vlan_strip &&
987 !!dev->data->dev_conf.rxmode.hw_vlan_strip);
988 attr.wq = (struct ibv_exp_wq_init_attr){
989 .wq_context = NULL, /* Could be useful in the future. */
990 .wq_type = IBV_EXP_WQT_RQ,
991 /* Max number of outstanding WRs. */
992 .max_recv_wr = desc >> tmpl.rxq.sges_n,
993 /* Max number of scatter/gather elements in a WR. */
994 .max_recv_sge = 1 << tmpl.rxq.sges_n,
998 IBV_EXP_CREATE_WQ_VLAN_OFFLOADS |
1000 .vlan_offloads = (tmpl.rxq.vlan_strip ?
1001 IBV_EXP_RECEIVE_WQ_CVLAN_STRIP :
1004 /* By default, FCS (CRC) is stripped by hardware. */
1005 if (dev->data->dev_conf.rxmode.hw_strip_crc) {
1006 tmpl.rxq.crc_present = 0;
1007 } else if (priv->hw_fcs_strip) {
1008 /* Ask HW/Verbs to leave CRC in place when supported. */
1009 attr.wq.flags |= IBV_EXP_CREATE_WQ_FLAG_SCATTER_FCS;
1010 attr.wq.comp_mask |= IBV_EXP_CREATE_WQ_FLAGS;
1011 tmpl.rxq.crc_present = 1;
1013 WARN("%p: CRC stripping has been disabled but will still"
1014 " be performed by hardware, make sure MLNX_OFED and"
1015 " firmware are up to date",
1017 tmpl.rxq.crc_present = 0;
1019 DEBUG("%p: CRC stripping is %s, %u bytes will be subtracted from"
1020 " incoming frames to hide it",
1022 tmpl.rxq.crc_present ? "disabled" : "enabled",
1023 tmpl.rxq.crc_present << 2);
1024 if (!mlx5_getenv_int("MLX5_PMD_ENABLE_PADDING"))
1025 ; /* Nothing else to do. */
1026 else if (priv->hw_padding) {
1027 INFO("%p: enabling packet padding on queue %p",
1028 (void *)dev, (void *)rxq_ctrl);
1029 attr.wq.flags |= IBV_EXP_CREATE_WQ_FLAG_RX_END_PADDING;
1030 attr.wq.comp_mask |= IBV_EXP_CREATE_WQ_FLAGS;
1032 WARN("%p: packet padding has been requested but is not"
1033 " supported, make sure MLNX_OFED and firmware are"
1037 tmpl.wq = ibv_exp_create_wq(priv->ctx, &attr.wq);
1038 if (tmpl.wq == NULL) {
1039 ret = (errno ? errno : EINVAL);
1040 ERROR("%p: WQ creation failure: %s",
1041 (void *)dev, strerror(ret));
1045 * Make sure number of WRs*SGEs match expectations since a queue
1046 * cannot allocate more than "desc" buffers.
1048 if (((int)attr.wq.max_recv_wr != (desc >> tmpl.rxq.sges_n)) ||
1049 ((int)attr.wq.max_recv_sge != (1 << tmpl.rxq.sges_n))) {
1050 ERROR("%p: requested %u*%u but got %u*%u WRs*SGEs",
1052 (desc >> tmpl.rxq.sges_n), (1 << tmpl.rxq.sges_n),
1053 attr.wq.max_recv_wr, attr.wq.max_recv_sge);
1058 tmpl.rxq.port_id = dev->data->port_id;
1059 DEBUG("%p: RTE port ID: %u", (void *)rxq_ctrl, tmpl.rxq.port_id);
1060 /* Change queue state to ready. */
1061 mod = (struct ibv_exp_wq_attr){
1062 .attr_mask = IBV_EXP_WQ_ATTR_STATE,
1063 .wq_state = IBV_EXP_WQS_RDY,
1065 ret = ibv_exp_modify_wq(tmpl.wq, &mod);
1067 ERROR("%p: WQ state to IBV_EXP_WQS_RDY failed: %s",
1068 (void *)dev, strerror(ret));
1071 ret = rxq_setup(&tmpl);
1073 ERROR("%p: cannot initialize RX queue structure: %s",
1074 (void *)dev, strerror(ret));
1077 /* Reuse buffers from original queue if possible. */
1078 if (rxq_ctrl->rxq.elts_n) {
1079 assert(1 << rxq_ctrl->rxq.elts_n == desc);
1080 assert(rxq_ctrl->rxq.elts != tmpl.rxq.elts);
1081 ret = rxq_trim_elts(&rxq_ctrl->rxq);
1083 ret = rxq_alloc_elts(&tmpl, desc, rxq_ctrl->rxq.elts);
1085 ret = rxq_alloc_elts(&tmpl, desc, NULL);
1087 ERROR("%p: RXQ allocation failed: %s",
1088 (void *)dev, strerror(ret));
1091 /* Clean up rxq in case we're reinitializing it. */
1092 DEBUG("%p: cleaning-up old rxq just in case", (void *)rxq_ctrl);
1093 rxq_cleanup(rxq_ctrl);
1094 /* Move mbuf pointers to dedicated storage area in RX queue. */
1095 elts = (void *)(rxq_ctrl + 1);
1096 rte_memcpy(elts, tmpl.rxq.elts, sizeof(*elts));
1098 memset(tmpl.rxq.elts, 0x55, sizeof(*elts));
1100 rte_free(tmpl.rxq.elts);
1101 tmpl.rxq.elts = elts;
1103 /* Update doorbell counter. */
1104 rxq_ctrl->rxq.rq_ci = desc >> rxq_ctrl->rxq.sges_n;
1106 *rxq_ctrl->rxq.rq_db = htonl(rxq_ctrl->rxq.rq_ci);
1107 DEBUG("%p: rxq updated with %p", (void *)rxq_ctrl, (void *)&tmpl);
1111 elts = tmpl.rxq.elts;
1119 * DPDK callback to configure a RX queue.
1122 * Pointer to Ethernet device structure.
1126 * Number of descriptors to configure in queue.
1128 * NUMA socket on which memory must be allocated.
1130 * Thresholds parameters.
1132 * Memory pool for buffer allocations.
1135 * 0 on success, negative errno value on failure.
1138 mlx5_rx_queue_setup(struct rte_eth_dev *dev, uint16_t idx, uint16_t desc,
1139 unsigned int socket, const struct rte_eth_rxconf *conf,
1140 struct rte_mempool *mp)
1142 struct priv *priv = dev->data->dev_private;
1143 struct rxq *rxq = (*priv->rxqs)[idx];
1144 struct rxq_ctrl *rxq_ctrl = container_of(rxq, struct rxq_ctrl, rxq);
1145 const uint16_t desc_pad = MLX5_VPMD_DESCS_PER_LOOP; /* For vPMD. */
1148 if (mlx5_is_secondary())
1149 return -E_RTE_SECONDARY;
1152 if (!rte_is_power_of_2(desc)) {
1153 desc = 1 << log2above(desc);
1154 WARN("%p: increased number of descriptors in RX queue %u"
1155 " to the next power of two (%d)",
1156 (void *)dev, idx, desc);
1158 DEBUG("%p: configuring queue %u for %u descriptors",
1159 (void *)dev, idx, desc);
1160 if (idx >= priv->rxqs_n) {
1161 ERROR("%p: queue index out of range (%u >= %u)",
1162 (void *)dev, idx, priv->rxqs_n);
1167 DEBUG("%p: reusing already allocated queue index %u (%p)",
1168 (void *)dev, idx, (void *)rxq);
1169 if (priv->started) {
1173 (*priv->rxqs)[idx] = NULL;
1174 rxq_cleanup(rxq_ctrl);
1175 /* Resize if rxq size is changed. */
1176 if (rxq_ctrl->rxq.elts_n != log2above(desc)) {
1177 rxq_ctrl = rte_realloc(rxq_ctrl,
1180 sizeof(struct rte_mbuf *),
1181 RTE_CACHE_LINE_SIZE);
1183 ERROR("%p: unable to reallocate queue index %u",
1190 rxq_ctrl = rte_calloc_socket("RXQ", 1, sizeof(*rxq_ctrl) +
1192 sizeof(struct rte_mbuf *),
1194 if (rxq_ctrl == NULL) {
1195 ERROR("%p: unable to allocate queue index %u",
1201 ret = rxq_ctrl_setup(dev, rxq_ctrl, desc, socket, conf, mp);
1205 rxq_ctrl->rxq.stats.idx = idx;
1206 DEBUG("%p: adding RX queue %p to list",
1207 (void *)dev, (void *)rxq_ctrl);
1208 (*priv->rxqs)[idx] = &rxq_ctrl->rxq;
1215 * DPDK callback to release a RX queue.
1218 * Generic RX queue pointer.
1221 mlx5_rx_queue_release(void *dpdk_rxq)
1223 struct rxq *rxq = (struct rxq *)dpdk_rxq;
1224 struct rxq_ctrl *rxq_ctrl;
1228 if (mlx5_is_secondary())
1233 rxq_ctrl = container_of(rxq, struct rxq_ctrl, rxq);
1234 priv = rxq_ctrl->priv;
1236 if (priv_flow_rxq_in_use(priv, rxq))
1237 rte_panic("Rx queue %p is still used by a flow and cannot be"
1238 " removed\n", (void *)rxq_ctrl);
1239 for (i = 0; (i != priv->rxqs_n); ++i)
1240 if ((*priv->rxqs)[i] == rxq) {
1241 DEBUG("%p: removing RX queue %p from list",
1242 (void *)priv->dev, (void *)rxq_ctrl);
1243 (*priv->rxqs)[i] = NULL;
1246 rxq_cleanup(rxq_ctrl);
1252 * DPDK callback for RX in secondary processes.
1254 * This function configures all queues from primary process information
1255 * if necessary before reverting to the normal RX burst callback.
1258 * Generic pointer to RX queue structure.
1260 * Array to store received packets.
1262 * Maximum number of packets in array.
1265 * Number of packets successfully received (<= pkts_n).
1268 mlx5_rx_burst_secondary_setup(void *dpdk_rxq, struct rte_mbuf **pkts,
1271 struct rxq *rxq = dpdk_rxq;
1272 struct rxq_ctrl *rxq_ctrl = container_of(rxq, struct rxq_ctrl, rxq);
1273 struct priv *priv = mlx5_secondary_data_setup(rxq_ctrl->priv);
1274 struct priv *primary_priv;
1280 mlx5_secondary_data[priv->dev->data->port_id].primary_priv;
1281 /* Look for queue index in both private structures. */
1282 for (index = 0; index != priv->rxqs_n; ++index)
1283 if (((*primary_priv->rxqs)[index] == rxq) ||
1284 ((*priv->rxqs)[index] == rxq))
1286 if (index == priv->rxqs_n)
1288 rxq = (*priv->rxqs)[index];
1289 return priv->dev->rx_pkt_burst(rxq, pkts, pkts_n);
1293 * Allocate queue vector and fill epoll fd list for Rx interrupts.
1296 * Pointer to private structure.
1299 * 0 on success, negative on failure.
1302 priv_rx_intr_vec_enable(struct priv *priv)
1305 unsigned int rxqs_n = priv->rxqs_n;
1306 unsigned int n = RTE_MIN(rxqs_n, (uint32_t)RTE_MAX_RXTX_INTR_VEC_ID);
1307 unsigned int count = 0;
1308 struct rte_intr_handle *intr_handle = priv->dev->intr_handle;
1310 if (!priv->dev->data->dev_conf.intr_conf.rxq)
1312 priv_rx_intr_vec_disable(priv);
1313 intr_handle->intr_vec = malloc(sizeof(intr_handle->intr_vec[rxqs_n]));
1314 if (intr_handle->intr_vec == NULL) {
1315 ERROR("failed to allocate memory for interrupt vector,"
1316 " Rx interrupts will not be supported");
1319 intr_handle->type = RTE_INTR_HANDLE_EXT;
1320 for (i = 0; i != n; ++i) {
1321 struct rxq *rxq = (*priv->rxqs)[i];
1322 struct rxq_ctrl *rxq_ctrl =
1323 container_of(rxq, struct rxq_ctrl, rxq);
1328 /* Skip queues that cannot request interrupts. */
1329 if (!rxq || !rxq_ctrl->channel) {
1330 /* Use invalid intr_vec[] index to disable entry. */
1331 intr_handle->intr_vec[i] =
1332 RTE_INTR_VEC_RXTX_OFFSET +
1333 RTE_MAX_RXTX_INTR_VEC_ID;
1336 if (count >= RTE_MAX_RXTX_INTR_VEC_ID) {
1337 ERROR("too many Rx queues for interrupt vector size"
1338 " (%d), Rx interrupts cannot be enabled",
1339 RTE_MAX_RXTX_INTR_VEC_ID);
1340 priv_rx_intr_vec_disable(priv);
1343 fd = rxq_ctrl->channel->fd;
1344 flags = fcntl(fd, F_GETFL);
1345 rc = fcntl(fd, F_SETFL, flags | O_NONBLOCK);
1347 ERROR("failed to make Rx interrupt file descriptor"
1348 " %d non-blocking for queue index %d", fd, i);
1349 priv_rx_intr_vec_disable(priv);
1352 intr_handle->intr_vec[i] = RTE_INTR_VEC_RXTX_OFFSET + count;
1353 intr_handle->efds[count] = fd;
1357 priv_rx_intr_vec_disable(priv);
1359 intr_handle->nb_efd = count;
1364 * Clean up Rx interrupts handler.
1367 * Pointer to private structure.
1370 priv_rx_intr_vec_disable(struct priv *priv)
1372 struct rte_intr_handle *intr_handle = priv->dev->intr_handle;
1374 rte_intr_free_epoll_fd(intr_handle);
1375 free(intr_handle->intr_vec);
1376 intr_handle->nb_efd = 0;
1377 intr_handle->intr_vec = NULL;
1380 #ifdef HAVE_UPDATE_CQ_CI
1383 * DPDK callback for Rx queue interrupt enable.
1386 * Pointer to Ethernet device structure.
1387 * @param rx_queue_id
1391 * 0 on success, negative on failure.
1394 mlx5_rx_intr_enable(struct rte_eth_dev *dev, uint16_t rx_queue_id)
1396 struct priv *priv = mlx5_get_priv(dev);
1397 struct rxq *rxq = (*priv->rxqs)[rx_queue_id];
1398 struct rxq_ctrl *rxq_ctrl = container_of(rxq, struct rxq_ctrl, rxq);
1401 if (!rxq || !rxq_ctrl->channel) {
1404 ibv_mlx5_exp_update_cq_ci(rxq_ctrl->cq, rxq->cq_ci);
1405 ret = ibv_req_notify_cq(rxq_ctrl->cq, 0);
1408 WARN("unable to arm interrupt on rx queue %d", rx_queue_id);
1413 * DPDK callback for Rx queue interrupt disable.
1416 * Pointer to Ethernet device structure.
1417 * @param rx_queue_id
1421 * 0 on success, negative on failure.
1424 mlx5_rx_intr_disable(struct rte_eth_dev *dev, uint16_t rx_queue_id)
1426 struct priv *priv = mlx5_get_priv(dev);
1427 struct rxq *rxq = (*priv->rxqs)[rx_queue_id];
1428 struct rxq_ctrl *rxq_ctrl = container_of(rxq, struct rxq_ctrl, rxq);
1429 struct ibv_cq *ev_cq;
1433 if (!rxq || !rxq_ctrl->channel) {
1436 ret = ibv_get_cq_event(rxq_ctrl->cq->channel, &ev_cq, &ev_ctx);
1437 if (ret || ev_cq != rxq_ctrl->cq)
1441 WARN("unable to disable interrupt on rx queue %d",
1444 ibv_ack_cq_events(rxq_ctrl->cq, 1);
1448 #endif /* HAVE_UPDATE_CQ_CI */