4 * Copyright 2015 6WIND S.A.
5 * Copyright 2015 Mellanox.
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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/mlx5dv.h>
49 #pragma GCC diagnostic error "-Wpedantic"
53 #include <rte_malloc.h>
54 #include <rte_ethdev.h>
55 #include <rte_common.h>
56 #include <rte_interrupts.h>
57 #include <rte_debug.h>
61 #include "mlx5_rxtx.h"
62 #include "mlx5_utils.h"
63 #include "mlx5_autoconf.h"
64 #include "mlx5_defs.h"
66 /* Initialization data for hash RX queues. */
67 const struct hash_rxq_init hash_rxq_init[] = {
69 .hash_fields = (IBV_RX_HASH_SRC_IPV4 |
70 IBV_RX_HASH_DST_IPV4 |
71 IBV_RX_HASH_SRC_PORT_TCP |
72 IBV_RX_HASH_DST_PORT_TCP),
73 .dpdk_rss_hf = ETH_RSS_NONFRAG_IPV4_TCP,
75 .flow_spec.tcp_udp = {
76 .type = IBV_FLOW_SPEC_TCP,
77 .size = sizeof(hash_rxq_init[0].flow_spec.tcp_udp),
79 .underlayer = &hash_rxq_init[HASH_RXQ_IPV4],
82 .hash_fields = (IBV_RX_HASH_SRC_IPV4 |
83 IBV_RX_HASH_DST_IPV4 |
84 IBV_RX_HASH_SRC_PORT_UDP |
85 IBV_RX_HASH_DST_PORT_UDP),
86 .dpdk_rss_hf = ETH_RSS_NONFRAG_IPV4_UDP,
88 .flow_spec.tcp_udp = {
89 .type = IBV_FLOW_SPEC_UDP,
90 .size = sizeof(hash_rxq_init[0].flow_spec.tcp_udp),
92 .underlayer = &hash_rxq_init[HASH_RXQ_IPV4],
95 .hash_fields = (IBV_RX_HASH_SRC_IPV4 |
96 IBV_RX_HASH_DST_IPV4),
97 .dpdk_rss_hf = (ETH_RSS_IPV4 |
101 .type = IBV_FLOW_SPEC_IPV4,
102 .size = sizeof(hash_rxq_init[0].flow_spec.ipv4),
104 .underlayer = &hash_rxq_init[HASH_RXQ_ETH],
107 .hash_fields = (IBV_RX_HASH_SRC_IPV6 |
108 IBV_RX_HASH_DST_IPV6 |
109 IBV_RX_HASH_SRC_PORT_TCP |
110 IBV_RX_HASH_DST_PORT_TCP),
111 .dpdk_rss_hf = ETH_RSS_NONFRAG_IPV6_TCP,
113 .flow_spec.tcp_udp = {
114 .type = IBV_FLOW_SPEC_TCP,
115 .size = sizeof(hash_rxq_init[0].flow_spec.tcp_udp),
117 .underlayer = &hash_rxq_init[HASH_RXQ_IPV6],
120 .hash_fields = (IBV_RX_HASH_SRC_IPV6 |
121 IBV_RX_HASH_DST_IPV6 |
122 IBV_RX_HASH_SRC_PORT_UDP |
123 IBV_RX_HASH_DST_PORT_UDP),
124 .dpdk_rss_hf = ETH_RSS_NONFRAG_IPV6_UDP,
126 .flow_spec.tcp_udp = {
127 .type = IBV_FLOW_SPEC_UDP,
128 .size = sizeof(hash_rxq_init[0].flow_spec.tcp_udp),
130 .underlayer = &hash_rxq_init[HASH_RXQ_IPV6],
133 .hash_fields = (IBV_RX_HASH_SRC_IPV6 |
134 IBV_RX_HASH_DST_IPV6),
135 .dpdk_rss_hf = (ETH_RSS_IPV6 |
139 .type = IBV_FLOW_SPEC_IPV6,
140 .size = sizeof(hash_rxq_init[0].flow_spec.ipv6),
142 .underlayer = &hash_rxq_init[HASH_RXQ_ETH],
149 .type = IBV_FLOW_SPEC_ETH,
150 .size = sizeof(hash_rxq_init[0].flow_spec.eth),
156 /* Number of entries in hash_rxq_init[]. */
157 const unsigned int hash_rxq_init_n = RTE_DIM(hash_rxq_init);
159 /* Initialization data for hash RX queue indirection tables. */
160 static const struct ind_table_init ind_table_init[] = {
162 .max_size = -1u, /* Superseded by HW limitations. */
164 1 << HASH_RXQ_TCPV4 |
165 1 << HASH_RXQ_UDPV4 |
167 1 << HASH_RXQ_TCPV6 |
168 1 << HASH_RXQ_UDPV6 |
175 .hash_types = 1 << HASH_RXQ_ETH,
180 #define IND_TABLE_INIT_N RTE_DIM(ind_table_init)
182 /* Default RSS hash key also used for ConnectX-3. */
183 uint8_t rss_hash_default_key[] = {
184 0x2c, 0xc6, 0x81, 0xd1,
185 0x5b, 0xdb, 0xf4, 0xf7,
186 0xfc, 0xa2, 0x83, 0x19,
187 0xdb, 0x1a, 0x3e, 0x94,
188 0x6b, 0x9e, 0x38, 0xd9,
189 0x2c, 0x9c, 0x03, 0xd1,
190 0xad, 0x99, 0x44, 0xa7,
191 0xd9, 0x56, 0x3d, 0x59,
192 0x06, 0x3c, 0x25, 0xf3,
193 0xfc, 0x1f, 0xdc, 0x2a,
196 /* Length of the default RSS hash key. */
197 const size_t rss_hash_default_key_len = sizeof(rss_hash_default_key);
200 * Populate flow steering rule for a given hash RX queue type using
201 * information from hash_rxq_init[]. Nothing is written to flow_attr when
202 * flow_attr_size is not large enough, but the required size is still returned.
205 * Pointer to private structure.
206 * @param[out] flow_attr
207 * Pointer to flow attribute structure to fill. Note that the allocated
208 * area must be larger and large enough to hold all flow specifications.
209 * @param flow_attr_size
210 * Entire size of flow_attr and trailing room for flow specifications.
212 * Hash RX queue type to use for flow steering rule.
215 * Total size of the flow attribute buffer. No errors are defined.
218 priv_flow_attr(struct priv *priv, struct ibv_flow_attr *flow_attr,
219 size_t flow_attr_size, enum hash_rxq_type type)
221 size_t offset = sizeof(*flow_attr);
222 const struct hash_rxq_init *init = &hash_rxq_init[type];
224 assert(priv != NULL);
225 assert((size_t)type < RTE_DIM(hash_rxq_init));
227 offset += init->flow_spec.hdr.size;
228 init = init->underlayer;
229 } while (init != NULL);
230 if (offset > flow_attr_size)
232 flow_attr_size = offset;
233 init = &hash_rxq_init[type];
234 *flow_attr = (struct ibv_flow_attr){
235 .type = IBV_FLOW_ATTR_NORMAL,
236 /* Priorities < 3 are reserved for flow director. */
237 .priority = init->flow_priority + 3,
243 offset -= init->flow_spec.hdr.size;
244 memcpy((void *)((uintptr_t)flow_attr + offset),
246 init->flow_spec.hdr.size);
247 ++flow_attr->num_of_specs;
248 init = init->underlayer;
249 } while (init != NULL);
250 return flow_attr_size;
254 * Convert hash type position in indirection table initializer to
255 * hash RX queue type.
258 * Indirection table initializer.
260 * Hash type position.
263 * Hash RX queue type.
265 static enum hash_rxq_type
266 hash_rxq_type_from_pos(const struct ind_table_init *table, unsigned int pos)
268 enum hash_rxq_type type = HASH_RXQ_TCPV4;
270 assert(pos < table->hash_types_n);
272 if ((table->hash_types & (1 << type)) && (pos-- == 0))
280 * Filter out disabled hash RX queue types from ind_table_init[].
283 * Pointer to private structure.
288 * Number of table entries.
291 priv_make_ind_table_init(struct priv *priv,
292 struct ind_table_init (*table)[IND_TABLE_INIT_N])
297 unsigned int table_n = 0;
298 /* Mandatory to receive frames not handled by normal hash RX queues. */
299 unsigned int hash_types_sup = 1 << HASH_RXQ_ETH;
301 rss_hf = priv->rss_hf;
302 /* Process other protocols only if more than one queue. */
303 if (priv->rxqs_n > 1)
304 for (i = 0; (i != hash_rxq_init_n); ++i)
305 if (rss_hf & hash_rxq_init[i].dpdk_rss_hf)
306 hash_types_sup |= (1 << i);
308 /* Filter out entries whose protocols are not in the set. */
309 for (i = 0, j = 0; (i != IND_TABLE_INIT_N); ++i) {
313 /* j is increased only if the table has valid protocols. */
315 (*table)[j] = ind_table_init[i];
316 (*table)[j].hash_types &= hash_types_sup;
317 for (h = 0, nb = 0; (h != hash_rxq_init_n); ++h)
318 if (((*table)[j].hash_types >> h) & 0x1)
320 (*table)[i].hash_types_n = nb;
330 * Initialize hash RX queues and indirection table.
333 * Pointer to private structure.
336 * 0 on success, errno value on failure.
339 priv_create_hash_rxqs(struct priv *priv)
341 struct ibv_wq *wqs[priv->reta_idx_n];
342 struct ind_table_init ind_table_init[IND_TABLE_INIT_N];
343 unsigned int ind_tables_n =
344 priv_make_ind_table_init(priv, &ind_table_init);
345 unsigned int hash_rxqs_n = 0;
346 struct hash_rxq (*hash_rxqs)[] = NULL;
347 struct ibv_rwq_ind_table *(*ind_tables)[] = NULL;
353 assert(priv->ind_tables == NULL);
354 assert(priv->ind_tables_n == 0);
355 assert(priv->hash_rxqs == NULL);
356 assert(priv->hash_rxqs_n == 0);
357 assert(priv->pd != NULL);
358 assert(priv->ctx != NULL);
361 if (priv->rxqs_n == 0)
363 assert(priv->rxqs != NULL);
364 if (ind_tables_n == 0) {
365 ERROR("all hash RX queue types have been filtered out,"
366 " indirection table cannot be created");
369 if (priv->rxqs_n & (priv->rxqs_n - 1)) {
370 INFO("%u RX queues are configured, consider rounding this"
371 " number to the next power of two for better balancing",
373 DEBUG("indirection table extended to assume %u WQs",
376 for (i = 0; (i != priv->reta_idx_n); ++i) {
377 struct rxq_ctrl *rxq_ctrl;
379 rxq_ctrl = container_of((*priv->rxqs)[(*priv->reta_idx)[i]],
380 struct rxq_ctrl, rxq);
381 wqs[i] = rxq_ctrl->wq;
383 /* Get number of hash RX queues to configure. */
384 for (i = 0, hash_rxqs_n = 0; (i != ind_tables_n); ++i)
385 hash_rxqs_n += ind_table_init[i].hash_types_n;
386 DEBUG("allocating %u hash RX queues for %u WQs, %u indirection tables",
387 hash_rxqs_n, priv->rxqs_n, ind_tables_n);
388 /* Create indirection tables. */
389 ind_tables = rte_calloc(__func__, ind_tables_n,
390 sizeof((*ind_tables)[0]), 0);
391 if (ind_tables == NULL) {
393 ERROR("cannot allocate indirection tables container: %s",
397 for (i = 0; (i != ind_tables_n); ++i) {
398 struct ibv_rwq_ind_table_init_attr ind_init_attr = {
399 .log_ind_tbl_size = 0, /* Set below. */
403 unsigned int ind_tbl_size = ind_table_init[i].max_size;
404 struct ibv_rwq_ind_table *ind_table;
406 if (priv->reta_idx_n < ind_tbl_size)
407 ind_tbl_size = priv->reta_idx_n;
408 ind_init_attr.log_ind_tbl_size = log2above(ind_tbl_size);
410 ind_table = ibv_create_rwq_ind_table(priv->ctx,
412 if (ind_table != NULL) {
413 (*ind_tables)[i] = ind_table;
416 /* Not clear whether errno is set. */
417 err = (errno ? errno : EINVAL);
418 ERROR("RX indirection table creation failed with error %d: %s",
422 /* Allocate array that holds hash RX queues and related data. */
423 hash_rxqs = rte_calloc(__func__, hash_rxqs_n,
424 sizeof((*hash_rxqs)[0]), 0);
425 if (hash_rxqs == NULL) {
427 ERROR("cannot allocate hash RX queues container: %s",
431 for (i = 0, j = 0, k = 0;
432 ((i != hash_rxqs_n) && (j != ind_tables_n));
434 struct hash_rxq *hash_rxq = &(*hash_rxqs)[i];
435 enum hash_rxq_type type =
436 hash_rxq_type_from_pos(&ind_table_init[j], k);
437 struct rte_eth_rss_conf *priv_rss_conf =
438 (*priv->rss_conf)[type];
439 struct ibv_rx_hash_conf hash_conf = {
440 .rx_hash_function = IBV_RX_HASH_FUNC_TOEPLITZ,
441 .rx_hash_key_len = (priv_rss_conf ?
442 priv_rss_conf->rss_key_len :
443 rss_hash_default_key_len),
444 .rx_hash_key = (priv_rss_conf ?
445 priv_rss_conf->rss_key :
446 rss_hash_default_key),
447 .rx_hash_fields_mask = hash_rxq_init[type].hash_fields,
449 struct ibv_qp_init_attr_ex qp_init_attr = {
450 .qp_type = IBV_QPT_RAW_PACKET,
451 .comp_mask = (IBV_QP_INIT_ATTR_PD |
452 IBV_QP_INIT_ATTR_IND_TABLE |
453 IBV_QP_INIT_ATTR_RX_HASH),
454 .rx_hash_conf = hash_conf,
455 .rwq_ind_tbl = (*ind_tables)[j],
459 DEBUG("using indirection table %u for hash RX queue %u type %d",
461 *hash_rxq = (struct hash_rxq){
463 .qp = ibv_create_qp_ex(priv->ctx, &qp_init_attr),
466 if (hash_rxq->qp == NULL) {
467 err = (errno ? errno : EINVAL);
468 ERROR("Hash RX QP creation failure: %s",
472 if (++k < ind_table_init[j].hash_types_n)
474 /* Switch to the next indirection table and reset hash RX
475 * queue type array index. */
479 priv->ind_tables = ind_tables;
480 priv->ind_tables_n = ind_tables_n;
481 priv->hash_rxqs = hash_rxqs;
482 priv->hash_rxqs_n = hash_rxqs_n;
486 if (hash_rxqs != NULL) {
487 for (i = 0; (i != hash_rxqs_n); ++i) {
488 struct ibv_qp *qp = (*hash_rxqs)[i].qp;
492 claim_zero(ibv_destroy_qp(qp));
496 if (ind_tables != NULL) {
497 for (j = 0; (j != ind_tables_n); ++j) {
498 struct ibv_rwq_ind_table *ind_table =
501 if (ind_table == NULL)
503 claim_zero(ibv_destroy_rwq_ind_table(ind_table));
505 rte_free(ind_tables);
511 * Clean up hash RX queues and indirection table.
514 * Pointer to private structure.
517 priv_destroy_hash_rxqs(struct priv *priv)
521 DEBUG("destroying %u hash RX queues", priv->hash_rxqs_n);
522 if (priv->hash_rxqs_n == 0) {
523 assert(priv->hash_rxqs == NULL);
524 assert(priv->ind_tables == NULL);
527 for (i = 0; (i != priv->hash_rxqs_n); ++i) {
528 struct hash_rxq *hash_rxq = &(*priv->hash_rxqs)[i];
531 assert(hash_rxq->priv == priv);
532 assert(hash_rxq->qp != NULL);
533 /* Also check that there are no remaining flows. */
534 for (j = 0; (j != RTE_DIM(hash_rxq->special_flow)); ++j)
536 (k != RTE_DIM(hash_rxq->special_flow[j]));
538 assert(hash_rxq->special_flow[j][k] == NULL);
539 for (j = 0; (j != RTE_DIM(hash_rxq->mac_flow)); ++j)
540 for (k = 0; (k != RTE_DIM(hash_rxq->mac_flow[j])); ++k)
541 assert(hash_rxq->mac_flow[j][k] == NULL);
542 claim_zero(ibv_destroy_qp(hash_rxq->qp));
544 priv->hash_rxqs_n = 0;
545 rte_free(priv->hash_rxqs);
546 priv->hash_rxqs = NULL;
547 for (i = 0; (i != priv->ind_tables_n); ++i) {
548 struct ibv_rwq_ind_table *ind_table =
549 (*priv->ind_tables)[i];
551 assert(ind_table != NULL);
552 claim_zero(ibv_destroy_rwq_ind_table(ind_table));
554 priv->ind_tables_n = 0;
555 rte_free(priv->ind_tables);
556 priv->ind_tables = NULL;
560 * Check whether a given flow type is allowed.
563 * Pointer to private structure.
565 * Flow type to check.
568 * Nonzero if the given flow type is allowed.
571 priv_allow_flow_type(struct priv *priv, enum hash_rxq_flow_type type)
573 /* Only FLOW_TYPE_PROMISC is allowed when promiscuous mode
574 * has been requested. */
575 if (priv->promisc_req)
576 return type == HASH_RXQ_FLOW_TYPE_PROMISC;
578 case HASH_RXQ_FLOW_TYPE_PROMISC:
579 return !!priv->promisc_req;
580 case HASH_RXQ_FLOW_TYPE_ALLMULTI:
581 return !!priv->allmulti_req;
582 case HASH_RXQ_FLOW_TYPE_BROADCAST:
583 case HASH_RXQ_FLOW_TYPE_IPV6MULTI:
584 /* If allmulti is enabled, broadcast and ipv6multi
585 * are unnecessary. */
586 return !priv->allmulti_req;
587 case HASH_RXQ_FLOW_TYPE_MAC:
590 /* Unsupported flow type is not allowed. */
597 * Automatically enable/disable flows according to configuration.
603 * 0 on success, errno value on failure.
606 priv_rehash_flows(struct priv *priv)
608 enum hash_rxq_flow_type i;
610 for (i = HASH_RXQ_FLOW_TYPE_PROMISC;
611 i != RTE_DIM((*priv->hash_rxqs)[0].special_flow);
613 if (!priv_allow_flow_type(priv, i)) {
614 priv_special_flow_disable(priv, i);
616 int ret = priv_special_flow_enable(priv, i);
621 if (priv_allow_flow_type(priv, HASH_RXQ_FLOW_TYPE_MAC))
622 return priv_mac_addrs_enable(priv);
623 priv_mac_addrs_disable(priv);
628 * Allocate RX queue elements.
631 * Pointer to RX queue structure.
633 * Number of elements to allocate.
636 * 0 on success, errno value on failure.
639 rxq_alloc_elts(struct rxq_ctrl *rxq_ctrl, unsigned int elts_n)
641 const unsigned int sges_n = 1 << rxq_ctrl->rxq.sges_n;
645 /* Iterate on segments. */
646 for (i = 0; (i != elts_n); ++i) {
647 struct rte_mbuf *buf;
648 volatile struct mlx5_wqe_data_seg *scat =
649 &(*rxq_ctrl->rxq.wqes)[i];
651 buf = rte_pktmbuf_alloc(rxq_ctrl->rxq.mp);
653 ERROR("%p: empty mbuf pool", (void *)rxq_ctrl);
657 /* Headroom is reserved by rte_pktmbuf_alloc(). */
658 assert(DATA_OFF(buf) == RTE_PKTMBUF_HEADROOM);
659 /* Buffer is supposed to be empty. */
660 assert(rte_pktmbuf_data_len(buf) == 0);
661 assert(rte_pktmbuf_pkt_len(buf) == 0);
663 /* Only the first segment keeps headroom. */
665 SET_DATA_OFF(buf, 0);
666 PORT(buf) = rxq_ctrl->rxq.port_id;
667 DATA_LEN(buf) = rte_pktmbuf_tailroom(buf);
668 PKT_LEN(buf) = DATA_LEN(buf);
670 /* scat->addr must be able to store a pointer. */
671 assert(sizeof(scat->addr) >= sizeof(uintptr_t));
672 *scat = (struct mlx5_wqe_data_seg){
674 rte_cpu_to_be_64(rte_pktmbuf_mtod(buf, uintptr_t)),
675 .byte_count = rte_cpu_to_be_32(DATA_LEN(buf)),
676 .lkey = rte_cpu_to_be_32(rxq_ctrl->mr->lkey),
678 (*rxq_ctrl->rxq.elts)[i] = buf;
680 if (rxq_check_vec_support(&rxq_ctrl->rxq) > 0) {
681 struct rxq *rxq = &rxq_ctrl->rxq;
682 struct rte_mbuf *mbuf_init = &rxq->fake_mbuf;
684 assert(rxq->elts_n == rxq->cqe_n);
685 /* Initialize default rearm_data for vPMD. */
686 mbuf_init->data_off = RTE_PKTMBUF_HEADROOM;
687 rte_mbuf_refcnt_set(mbuf_init, 1);
688 mbuf_init->nb_segs = 1;
689 mbuf_init->port = rxq->port_id;
691 * prevent compiler reordering:
692 * rearm_data covers previous fields.
694 rte_compiler_barrier();
695 rxq->mbuf_initializer = *(uint64_t *)&mbuf_init->rearm_data;
696 /* Padding with a fake mbuf for vectorized Rx. */
697 for (i = 0; i < MLX5_VPMD_DESCS_PER_LOOP; ++i)
698 (*rxq->elts)[elts_n + i] = &rxq->fake_mbuf;
700 DEBUG("%p: allocated and configured %u segments (max %u packets)",
701 (void *)rxq_ctrl, elts_n, elts_n / (1 << rxq_ctrl->rxq.sges_n));
706 for (i = 0; (i != elts_n); ++i) {
707 if ((*rxq_ctrl->rxq.elts)[i] != NULL)
708 rte_pktmbuf_free_seg((*rxq_ctrl->rxq.elts)[i]);
709 (*rxq_ctrl->rxq.elts)[i] = NULL;
711 DEBUG("%p: failed, freed everything", (void *)rxq_ctrl);
717 * Free RX queue elements.
720 * Pointer to RX queue structure.
723 rxq_free_elts(struct rxq_ctrl *rxq_ctrl)
725 struct rxq *rxq = &rxq_ctrl->rxq;
726 const uint16_t q_n = (1 << rxq->elts_n);
727 const uint16_t q_mask = q_n - 1;
728 uint16_t used = q_n - (rxq->rq_ci - rxq->rq_pi);
731 DEBUG("%p: freeing WRs", (void *)rxq_ctrl);
732 if (rxq->elts == NULL)
735 * Some mbuf in the Ring belongs to the application. They cannot be
738 if (rxq_check_vec_support(rxq) > 0) {
739 for (i = 0; i < used; ++i)
740 (*rxq->elts)[(rxq->rq_ci + i) & q_mask] = NULL;
741 rxq->rq_pi = rxq->rq_ci;
743 for (i = 0; (i != (1u << rxq->elts_n)); ++i) {
744 if ((*rxq->elts)[i] != NULL)
745 rte_pktmbuf_free_seg((*rxq->elts)[i]);
746 (*rxq->elts)[i] = NULL;
751 * Clean up a RX queue.
753 * Destroy objects, free allocated memory and reset the structure for reuse.
756 * Pointer to RX queue structure.
759 rxq_cleanup(struct rxq_ctrl *rxq_ctrl)
761 DEBUG("cleaning up %p", (void *)rxq_ctrl);
762 rxq_free_elts(rxq_ctrl);
763 if (rxq_ctrl->wq != NULL)
764 claim_zero(ibv_destroy_wq(rxq_ctrl->wq));
765 if (rxq_ctrl->cq != NULL)
766 claim_zero(ibv_destroy_cq(rxq_ctrl->cq));
767 if (rxq_ctrl->channel != NULL)
768 claim_zero(ibv_destroy_comp_channel(rxq_ctrl->channel));
769 if (rxq_ctrl->mr != NULL)
770 claim_zero(ibv_dereg_mr(rxq_ctrl->mr));
771 memset(rxq_ctrl, 0, sizeof(*rxq_ctrl));
775 * Initialize RX queue.
778 * Pointer to RX queue control template.
781 * 0 on success, errno value on failure.
784 rxq_setup(struct rxq_ctrl *tmpl)
786 struct ibv_cq *ibcq = tmpl->cq;
787 struct mlx5dv_cq cq_info;
788 struct mlx5dv_rwq rwq;
789 const uint16_t desc_n =
790 (1 << tmpl->rxq.elts_n) + tmpl->priv->rx_vec_en *
791 MLX5_VPMD_DESCS_PER_LOOP;
792 struct rte_mbuf *(*elts)[desc_n] =
793 rte_calloc_socket("RXQ", 1, sizeof(*elts), 0, tmpl->socket);
794 struct mlx5dv_obj obj;
798 obj.cq.out = &cq_info;
799 obj.rwq.in = tmpl->wq;
801 ret = mlx5dv_init_obj(&obj, MLX5DV_OBJ_CQ | MLX5DV_OBJ_RWQ);
805 if (cq_info.cqe_size != RTE_CACHE_LINE_SIZE) {
806 ERROR("Wrong MLX5_CQE_SIZE environment variable value: "
807 "it should be set to %u", RTE_CACHE_LINE_SIZE);
812 tmpl->rxq.rq_db = rwq.dbrec;
813 tmpl->rxq.cqe_n = log2above(cq_info.cqe_cnt);
817 tmpl->rxq.cq_db = cq_info.dbrec;
819 (volatile struct mlx5_wqe_data_seg (*)[])
822 (volatile struct mlx5_cqe (*)[])
823 (uintptr_t)cq_info.buf;
824 tmpl->rxq.elts = elts;
825 tmpl->rxq.cq_uar = cq_info.cq_uar;
826 tmpl->rxq.cqn = cq_info.cqn;
827 tmpl->rxq.cq_arm_sn = 0;
832 * Configure a RX queue.
835 * Pointer to Ethernet device structure.
837 * Pointer to RX queue structure.
839 * Number of descriptors to configure in queue.
841 * NUMA socket on which memory must be allocated.
843 * Thresholds parameters.
845 * Memory pool for buffer allocations.
848 * 0 on success, errno value on failure.
851 rxq_ctrl_setup(struct rte_eth_dev *dev, struct rxq_ctrl *rxq_ctrl,
852 uint16_t desc, unsigned int socket,
853 const struct rte_eth_rxconf *conf, struct rte_mempool *mp)
855 struct priv *priv = dev->data->dev_private;
856 struct rxq_ctrl tmpl = {
860 .elts_n = log2above(desc),
862 .rss_hash = priv->rxqs_n > 1,
865 struct ibv_wq_attr mod;
867 struct ibv_cq_init_attr_ex cq;
868 struct ibv_wq_init_attr wq;
869 struct ibv_cq_ex cq_attr;
871 unsigned int mb_len = rte_pktmbuf_data_room_size(mp);
872 unsigned int cqe_n = desc - 1;
873 const uint16_t desc_n =
874 desc + priv->rx_vec_en * MLX5_VPMD_DESCS_PER_LOOP;
875 struct rte_mbuf *(*elts)[desc_n] = NULL;
878 (void)conf; /* Thresholds configuration (ignored). */
879 /* Enable scattered packets support for this queue if necessary. */
880 assert(mb_len >= RTE_PKTMBUF_HEADROOM);
881 if (dev->data->dev_conf.rxmode.max_rx_pkt_len <=
882 (mb_len - RTE_PKTMBUF_HEADROOM)) {
884 } else if (dev->data->dev_conf.rxmode.enable_scatter) {
886 RTE_PKTMBUF_HEADROOM +
887 dev->data->dev_conf.rxmode.max_rx_pkt_len;
891 * Determine the number of SGEs needed for a full packet
892 * and round it to the next power of two.
894 sges_n = log2above((size / mb_len) + !!(size % mb_len));
895 tmpl.rxq.sges_n = sges_n;
896 /* Make sure rxq.sges_n did not overflow. */
897 size = mb_len * (1 << tmpl.rxq.sges_n);
898 size -= RTE_PKTMBUF_HEADROOM;
899 if (size < dev->data->dev_conf.rxmode.max_rx_pkt_len) {
900 ERROR("%p: too many SGEs (%u) needed to handle"
901 " requested maximum packet size %u",
904 dev->data->dev_conf.rxmode.max_rx_pkt_len);
908 WARN("%p: the requested maximum Rx packet size (%u) is"
909 " larger than a single mbuf (%u) and scattered"
910 " mode has not been requested",
912 dev->data->dev_conf.rxmode.max_rx_pkt_len,
913 mb_len - RTE_PKTMBUF_HEADROOM);
915 DEBUG("%p: maximum number of segments per packet: %u",
916 (void *)dev, 1 << tmpl.rxq.sges_n);
917 if (desc % (1 << tmpl.rxq.sges_n)) {
918 ERROR("%p: number of RX queue descriptors (%u) is not a"
919 " multiple of SGEs per packet (%u)",
922 1 << tmpl.rxq.sges_n);
925 /* Toggle RX checksum offload if hardware supports it. */
927 tmpl.rxq.csum = !!dev->data->dev_conf.rxmode.hw_ip_checksum;
928 if (priv->hw_csum_l2tun)
929 tmpl.rxq.csum_l2tun =
930 !!dev->data->dev_conf.rxmode.hw_ip_checksum;
931 /* Use the entire RX mempool as the memory region. */
932 tmpl.mr = mlx5_mp2mr(priv->pd, mp);
933 if (tmpl.mr == NULL) {
935 ERROR("%p: MR creation failure: %s",
936 (void *)dev, strerror(ret));
939 if (dev->data->dev_conf.intr_conf.rxq) {
940 tmpl.channel = ibv_create_comp_channel(priv->ctx);
941 if (tmpl.channel == NULL) {
943 ERROR("%p: Rx interrupt completion channel creation"
945 (void *)dev, strerror(ret));
949 attr.cq = (struct ibv_cq_init_attr_ex){
952 if (priv->cqe_comp) {
953 attr.cq.comp_mask |= IBV_CQ_INIT_ATTR_MASK_FLAGS;
954 attr.cq.flags |= MLX5DV_CQ_INIT_ATTR_MASK_COMPRESSED_CQE;
956 * For vectorized Rx, it must not be doubled in order to
957 * make cq_ci and rq_ci aligned.
959 if (rxq_check_vec_support(&tmpl.rxq) < 0)
960 cqe_n = (desc * 2) - 1; /* Double the number of CQEs. */
962 tmpl.cq = ibv_create_cq(priv->ctx, cqe_n, NULL, tmpl.channel, 0);
963 if (tmpl.cq == NULL) {
965 ERROR("%p: CQ creation failure: %s",
966 (void *)dev, strerror(ret));
969 DEBUG("priv->device_attr.max_qp_wr is %d",
970 priv->device_attr.orig_attr.max_qp_wr);
971 DEBUG("priv->device_attr.max_sge is %d",
972 priv->device_attr.orig_attr.max_sge);
973 /* Configure VLAN stripping. */
974 tmpl.rxq.vlan_strip = (priv->hw_vlan_strip &&
975 !!dev->data->dev_conf.rxmode.hw_vlan_strip);
976 attr.wq = (struct ibv_wq_init_attr){
977 .wq_context = NULL, /* Could be useful in the future. */
978 .wq_type = IBV_WQT_RQ,
979 /* Max number of outstanding WRs. */
980 .max_wr = desc >> tmpl.rxq.sges_n,
981 /* Max number of scatter/gather elements in a WR. */
982 .max_sge = 1 << tmpl.rxq.sges_n,
986 IBV_WQ_FLAGS_CVLAN_STRIPPING |
988 .create_flags = (tmpl.rxq.vlan_strip ?
989 IBV_WQ_FLAGS_CVLAN_STRIPPING :
992 /* By default, FCS (CRC) is stripped by hardware. */
993 if (dev->data->dev_conf.rxmode.hw_strip_crc) {
994 tmpl.rxq.crc_present = 0;
995 } else if (priv->hw_fcs_strip) {
996 /* Ask HW/Verbs to leave CRC in place when supported. */
997 attr.wq.create_flags |= IBV_WQ_FLAGS_SCATTER_FCS;
998 attr.wq.comp_mask |= IBV_WQ_INIT_ATTR_FLAGS;
999 tmpl.rxq.crc_present = 1;
1001 WARN("%p: CRC stripping has been disabled but will still"
1002 " be performed by hardware, make sure MLNX_OFED and"
1003 " firmware are up to date",
1005 tmpl.rxq.crc_present = 0;
1007 DEBUG("%p: CRC stripping is %s, %u bytes will be subtracted from"
1008 " incoming frames to hide it",
1010 tmpl.rxq.crc_present ? "disabled" : "enabled",
1011 tmpl.rxq.crc_present << 2);
1012 #ifdef HAVE_IBV_WQ_FLAG_RX_END_PADDING
1013 if (!mlx5_getenv_int("MLX5_PMD_ENABLE_PADDING"))
1014 ; /* Nothing else to do. */
1015 else if (priv->hw_padding) {
1016 INFO("%p: enabling packet padding on queue %p",
1017 (void *)dev, (void *)rxq_ctrl);
1018 attr.wq.create_flags |= IBV_WQ_FLAG_RX_END_PADDING;
1019 attr.wq.comp_mask |= IBV_WQ_INIT_ATTR_FLAGS;
1021 WARN("%p: packet padding has been requested but is not"
1022 " supported, make sure MLNX_OFED and firmware are"
1027 tmpl.wq = ibv_create_wq(priv->ctx, &attr.wq);
1028 if (tmpl.wq == NULL) {
1029 ret = (errno ? errno : EINVAL);
1030 ERROR("%p: WQ creation failure: %s",
1031 (void *)dev, strerror(ret));
1035 * Make sure number of WRs*SGEs match expectations since a queue
1036 * cannot allocate more than "desc" buffers.
1038 if (((int)attr.wq.max_wr != (desc >> tmpl.rxq.sges_n)) ||
1039 ((int)attr.wq.max_sge != (1 << tmpl.rxq.sges_n))) {
1040 ERROR("%p: requested %u*%u but got %u*%u WRs*SGEs",
1042 (desc >> tmpl.rxq.sges_n), (1 << tmpl.rxq.sges_n),
1043 attr.wq.max_wr, attr.wq.max_sge);
1048 tmpl.rxq.port_id = dev->data->port_id;
1049 DEBUG("%p: RTE port ID: %u", (void *)rxq_ctrl, tmpl.rxq.port_id);
1050 /* Change queue state to ready. */
1051 mod = (struct ibv_wq_attr){
1052 .attr_mask = IBV_WQ_ATTR_STATE,
1053 .wq_state = IBV_WQS_RDY,
1055 ret = ibv_modify_wq(tmpl.wq, &mod);
1057 ERROR("%p: WQ state to IBV_WQS_RDY failed: %s",
1058 (void *)dev, strerror(ret));
1061 ret = rxq_setup(&tmpl);
1063 ERROR("%p: cannot initialize RX queue structure: %s",
1064 (void *)dev, strerror(ret));
1067 ret = rxq_alloc_elts(&tmpl, desc);
1069 ERROR("%p: RXQ allocation failed: %s",
1070 (void *)dev, strerror(ret));
1073 /* Clean up rxq in case we're reinitializing it. */
1074 DEBUG("%p: cleaning-up old rxq just in case", (void *)rxq_ctrl);
1075 rxq_cleanup(rxq_ctrl);
1076 /* Move mbuf pointers to dedicated storage area in RX queue. */
1077 elts = (void *)(rxq_ctrl + 1);
1078 rte_memcpy(elts, tmpl.rxq.elts, sizeof(*elts));
1080 memset(tmpl.rxq.elts, 0x55, sizeof(*elts));
1082 rte_free(tmpl.rxq.elts);
1083 tmpl.rxq.elts = elts;
1085 /* Update doorbell counter. */
1086 rxq_ctrl->rxq.rq_ci = desc >> rxq_ctrl->rxq.sges_n;
1088 *rxq_ctrl->rxq.rq_db = rte_cpu_to_be_32(rxq_ctrl->rxq.rq_ci);
1089 DEBUG("%p: rxq updated with %p", (void *)rxq_ctrl, (void *)&tmpl);
1093 elts = tmpl.rxq.elts;
1101 * DPDK callback to configure a RX queue.
1104 * Pointer to Ethernet device structure.
1108 * Number of descriptors to configure in queue.
1110 * NUMA socket on which memory must be allocated.
1112 * Thresholds parameters.
1114 * Memory pool for buffer allocations.
1117 * 0 on success, negative errno value on failure.
1120 mlx5_rx_queue_setup(struct rte_eth_dev *dev, uint16_t idx, uint16_t desc,
1121 unsigned int socket, const struct rte_eth_rxconf *conf,
1122 struct rte_mempool *mp)
1124 struct priv *priv = dev->data->dev_private;
1125 struct rxq *rxq = (*priv->rxqs)[idx];
1126 struct rxq_ctrl *rxq_ctrl = container_of(rxq, struct rxq_ctrl, rxq);
1127 const uint16_t desc_n =
1128 desc + priv->rx_vec_en * MLX5_VPMD_DESCS_PER_LOOP;
1131 if (mlx5_is_secondary())
1132 return -E_RTE_SECONDARY;
1135 if (!rte_is_power_of_2(desc)) {
1136 desc = 1 << log2above(desc);
1137 WARN("%p: increased number of descriptors in RX queue %u"
1138 " to the next power of two (%d)",
1139 (void *)dev, idx, desc);
1141 DEBUG("%p: configuring queue %u for %u descriptors",
1142 (void *)dev, idx, desc);
1143 if (idx >= priv->rxqs_n) {
1144 ERROR("%p: queue index out of range (%u >= %u)",
1145 (void *)dev, idx, priv->rxqs_n);
1150 DEBUG("%p: reusing already allocated queue index %u (%p)",
1151 (void *)dev, idx, (void *)rxq);
1152 if (priv->started) {
1156 (*priv->rxqs)[idx] = NULL;
1157 rxq_cleanup(rxq_ctrl);
1158 /* Resize if rxq size is changed. */
1159 if (rxq_ctrl->rxq.elts_n != log2above(desc)) {
1160 rxq_ctrl = rte_realloc(rxq_ctrl,
1161 sizeof(*rxq_ctrl) + desc_n *
1162 sizeof(struct rte_mbuf *),
1163 RTE_CACHE_LINE_SIZE);
1165 ERROR("%p: unable to reallocate queue index %u",
1172 rxq_ctrl = rte_calloc_socket("RXQ", 1, sizeof(*rxq_ctrl) +
1174 sizeof(struct rte_mbuf *),
1176 if (rxq_ctrl == NULL) {
1177 ERROR("%p: unable to allocate queue index %u",
1183 ret = rxq_ctrl_setup(dev, rxq_ctrl, desc, socket, conf, mp);
1187 rxq_ctrl->rxq.stats.idx = idx;
1188 DEBUG("%p: adding RX queue %p to list",
1189 (void *)dev, (void *)rxq_ctrl);
1190 (*priv->rxqs)[idx] = &rxq_ctrl->rxq;
1197 * DPDK callback to release a RX queue.
1200 * Generic RX queue pointer.
1203 mlx5_rx_queue_release(void *dpdk_rxq)
1205 struct rxq *rxq = (struct rxq *)dpdk_rxq;
1206 struct rxq_ctrl *rxq_ctrl;
1210 if (mlx5_is_secondary())
1215 rxq_ctrl = container_of(rxq, struct rxq_ctrl, rxq);
1216 priv = rxq_ctrl->priv;
1218 if (priv_flow_rxq_in_use(priv, rxq))
1219 rte_panic("Rx queue %p is still used by a flow and cannot be"
1220 " removed\n", (void *)rxq_ctrl);
1221 for (i = 0; (i != priv->rxqs_n); ++i)
1222 if ((*priv->rxqs)[i] == rxq) {
1223 DEBUG("%p: removing RX queue %p from list",
1224 (void *)priv->dev, (void *)rxq_ctrl);
1225 (*priv->rxqs)[i] = NULL;
1228 rxq_cleanup(rxq_ctrl);
1234 * Allocate queue vector and fill epoll fd list for Rx interrupts.
1237 * Pointer to private structure.
1240 * 0 on success, negative on failure.
1243 priv_rx_intr_vec_enable(struct priv *priv)
1246 unsigned int rxqs_n = priv->rxqs_n;
1247 unsigned int n = RTE_MIN(rxqs_n, (uint32_t)RTE_MAX_RXTX_INTR_VEC_ID);
1248 unsigned int count = 0;
1249 struct rte_intr_handle *intr_handle = priv->dev->intr_handle;
1251 assert(!mlx5_is_secondary());
1252 if (!priv->dev->data->dev_conf.intr_conf.rxq)
1254 priv_rx_intr_vec_disable(priv);
1255 intr_handle->intr_vec = malloc(sizeof(intr_handle->intr_vec[rxqs_n]));
1256 if (intr_handle->intr_vec == NULL) {
1257 ERROR("failed to allocate memory for interrupt vector,"
1258 " Rx interrupts will not be supported");
1261 intr_handle->type = RTE_INTR_HANDLE_EXT;
1262 for (i = 0; i != n; ++i) {
1263 struct rxq *rxq = (*priv->rxqs)[i];
1264 struct rxq_ctrl *rxq_ctrl =
1265 container_of(rxq, struct rxq_ctrl, rxq);
1270 /* Skip queues that cannot request interrupts. */
1271 if (!rxq || !rxq_ctrl->channel) {
1272 /* Use invalid intr_vec[] index to disable entry. */
1273 intr_handle->intr_vec[i] =
1274 RTE_INTR_VEC_RXTX_OFFSET +
1275 RTE_MAX_RXTX_INTR_VEC_ID;
1278 if (count >= RTE_MAX_RXTX_INTR_VEC_ID) {
1279 ERROR("too many Rx queues for interrupt vector size"
1280 " (%d), Rx interrupts cannot be enabled",
1281 RTE_MAX_RXTX_INTR_VEC_ID);
1282 priv_rx_intr_vec_disable(priv);
1285 fd = rxq_ctrl->channel->fd;
1286 flags = fcntl(fd, F_GETFL);
1287 rc = fcntl(fd, F_SETFL, flags | O_NONBLOCK);
1289 ERROR("failed to make Rx interrupt file descriptor"
1290 " %d non-blocking for queue index %d", fd, i);
1291 priv_rx_intr_vec_disable(priv);
1294 intr_handle->intr_vec[i] = RTE_INTR_VEC_RXTX_OFFSET + count;
1295 intr_handle->efds[count] = fd;
1299 priv_rx_intr_vec_disable(priv);
1301 intr_handle->nb_efd = count;
1306 * Clean up Rx interrupts handler.
1309 * Pointer to private structure.
1312 priv_rx_intr_vec_disable(struct priv *priv)
1314 struct rte_intr_handle *intr_handle = priv->dev->intr_handle;
1316 rte_intr_free_epoll_fd(intr_handle);
1317 free(intr_handle->intr_vec);
1318 intr_handle->nb_efd = 0;
1319 intr_handle->intr_vec = NULL;
1323 * MLX5 CQ notification .
1326 * Pointer to receive queue structure.
1328 * Sequence number per receive queue .
1331 mlx5_arm_cq(struct rxq *rxq, int sq_n_rxq)
1334 uint32_t doorbell_hi;
1336 void *cq_db_reg = (char *)rxq->cq_uar + MLX5_CQ_DOORBELL;
1338 sq_n = sq_n_rxq & MLX5_CQ_SQN_MASK;
1339 doorbell_hi = sq_n << MLX5_CQ_SQN_OFFSET | (rxq->cq_ci & MLX5_CI_MASK);
1340 doorbell = (uint64_t)doorbell_hi << 32;
1341 doorbell |= rxq->cqn;
1342 rxq->cq_db[MLX5_CQ_ARM_DB] = rte_cpu_to_be_32(doorbell_hi);
1344 rte_write64(rte_cpu_to_be_64(doorbell), cq_db_reg);
1348 * DPDK callback for Rx queue interrupt enable.
1351 * Pointer to Ethernet device structure.
1352 * @param rx_queue_id
1356 * 0 on success, negative on failure.
1359 mlx5_rx_intr_enable(struct rte_eth_dev *dev, uint16_t rx_queue_id)
1361 struct priv *priv = mlx5_get_priv(dev);
1362 struct rxq *rxq = (*priv->rxqs)[rx_queue_id];
1363 struct rxq_ctrl *rxq_ctrl = container_of(rxq, struct rxq_ctrl, rxq);
1366 if (!rxq || !rxq_ctrl->channel) {
1369 mlx5_arm_cq(rxq, rxq->cq_arm_sn);
1372 WARN("unable to arm interrupt on rx queue %d", rx_queue_id);
1377 * DPDK callback for Rx queue interrupt disable.
1380 * Pointer to Ethernet device structure.
1381 * @param rx_queue_id
1385 * 0 on success, negative on failure.
1388 mlx5_rx_intr_disable(struct rte_eth_dev *dev, uint16_t rx_queue_id)
1390 struct priv *priv = mlx5_get_priv(dev);
1391 struct rxq *rxq = (*priv->rxqs)[rx_queue_id];
1392 struct rxq_ctrl *rxq_ctrl = container_of(rxq, struct rxq_ctrl, rxq);
1393 struct ibv_cq *ev_cq;
1397 if (!rxq || !rxq_ctrl->channel) {
1400 ret = ibv_get_cq_event(rxq_ctrl->cq->channel, &ev_cq, &ev_ctx);
1402 if (ret || ev_cq != rxq_ctrl->cq)
1406 WARN("unable to disable interrupt on rx queue %d",
1409 ibv_ack_cq_events(rxq_ctrl->cq, 1);