4 * Copyright 2012 6WIND S.A.
5 * Copyright 2012 Mellanox
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8 * modification, are permitted provided that the following conditions
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12 * notice, this list of conditions and the following disclaimer.
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14 * notice, this list of conditions and the following disclaimer in
15 * the documentation and/or other materials provided with the
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23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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46 #include <sys/ioctl.h>
47 #include <sys/socket.h>
48 #include <netinet/in.h>
49 #include <linux/ethtool.h>
50 #include <linux/sockios.h>
53 #include <rte_ether.h>
54 #include <rte_ethdev.h>
55 #include <rte_ethdev_pci.h>
58 #include <rte_errno.h>
59 #include <rte_mempool.h>
60 #include <rte_prefetch.h>
61 #include <rte_malloc.h>
62 #include <rte_spinlock.h>
64 #include <rte_alarm.h>
65 #include <rte_memory.h>
67 #include <rte_kvargs.h>
68 #include <rte_interrupts.h>
69 #include <rte_branch_prediction.h>
71 /* Generated configuration header. */
72 #include "mlx4_autoconf.h"
76 #include "mlx4_flow.h"
78 /* Convenience macros for accessing mbuf fields. */
79 #define NEXT(m) ((m)->next)
80 #define DATA_LEN(m) ((m)->data_len)
81 #define PKT_LEN(m) ((m)->pkt_len)
82 #define DATA_OFF(m) ((m)->data_off)
83 #define SET_DATA_OFF(m, o) ((m)->data_off = (o))
84 #define NB_SEGS(m) ((m)->nb_segs)
85 #define PORT(m) ((m)->port)
87 /* Work Request ID data type (64 bit). */
96 #define WR_ID(o) (((wr_id_t *)&(o))->data)
98 /** Configuration structure for device arguments. */
101 uint32_t present; /**< Bit-field for existing ports. */
102 uint32_t enabled; /**< Bit-field for user-enabled ports. */
106 /* Available parameters list. */
107 const char *pmd_mlx4_init_params[] = {
113 mlx4_rx_intr_enable(struct rte_eth_dev *dev, uint16_t idx);
116 mlx4_rx_intr_disable(struct rte_eth_dev *dev, uint16_t idx);
119 priv_rx_intr_vec_enable(struct priv *priv);
122 priv_rx_intr_vec_disable(struct priv *priv);
125 * Lock private structure to protect it from concurrent access in the
129 * Pointer to private structure.
131 void priv_lock(struct priv *priv)
133 rte_spinlock_lock(&priv->lock);
137 * Unlock private structure.
140 * Pointer to private structure.
142 void priv_unlock(struct priv *priv)
144 rte_spinlock_unlock(&priv->lock);
147 /* Allocate a buffer on the stack and fill it with a printf format string. */
148 #define MKSTR(name, ...) \
149 char name[snprintf(NULL, 0, __VA_ARGS__) + 1]; \
151 snprintf(name, sizeof(name), __VA_ARGS__)
154 * Get interface name from private structure.
157 * Pointer to private structure.
159 * Interface name output buffer.
162 * 0 on success, -1 on failure and errno is set.
165 priv_get_ifname(const struct priv *priv, char (*ifname)[IF_NAMESIZE])
169 unsigned int dev_type = 0;
170 unsigned int dev_port_prev = ~0u;
171 char match[IF_NAMESIZE] = "";
174 MKSTR(path, "%s/device/net", priv->ctx->device->ibdev_path);
180 while ((dent = readdir(dir)) != NULL) {
181 char *name = dent->d_name;
183 unsigned int dev_port;
186 if ((name[0] == '.') &&
187 ((name[1] == '\0') ||
188 ((name[1] == '.') && (name[2] == '\0'))))
191 MKSTR(path, "%s/device/net/%s/%s",
192 priv->ctx->device->ibdev_path, name,
193 (dev_type ? "dev_id" : "dev_port"));
195 file = fopen(path, "rb");
200 * Switch to dev_id when dev_port does not exist as
201 * is the case with Linux kernel versions < 3.15.
212 r = fscanf(file, (dev_type ? "%x" : "%u"), &dev_port);
217 * Switch to dev_id when dev_port returns the same value for
218 * all ports. May happen when using a MOFED release older than
219 * 3.0 with a Linux kernel >= 3.15.
221 if (dev_port == dev_port_prev)
223 dev_port_prev = dev_port;
224 if (dev_port == (priv->port - 1u))
225 snprintf(match, sizeof(match), "%s", name);
228 if (match[0] == '\0')
230 strncpy(*ifname, match, sizeof(*ifname));
235 * Read from sysfs entry.
238 * Pointer to private structure.
240 * Entry name relative to sysfs path.
242 * Data output buffer.
247 * 0 on success, -1 on failure and errno is set.
250 priv_sysfs_read(const struct priv *priv, const char *entry,
251 char *buf, size_t size)
253 char ifname[IF_NAMESIZE];
258 if (priv_get_ifname(priv, &ifname))
261 MKSTR(path, "%s/device/net/%s/%s", priv->ctx->device->ibdev_path,
264 file = fopen(path, "rb");
267 ret = fread(buf, 1, size, file);
269 if (((size_t)ret < size) && (ferror(file)))
279 * Write to sysfs entry.
282 * Pointer to private structure.
284 * Entry name relative to sysfs path.
291 * 0 on success, -1 on failure and errno is set.
294 priv_sysfs_write(const struct priv *priv, const char *entry,
295 char *buf, size_t size)
297 char ifname[IF_NAMESIZE];
302 if (priv_get_ifname(priv, &ifname))
305 MKSTR(path, "%s/device/net/%s/%s", priv->ctx->device->ibdev_path,
308 file = fopen(path, "wb");
311 ret = fwrite(buf, 1, size, file);
313 if (((size_t)ret < size) || (ferror(file)))
323 * Get unsigned long sysfs property.
326 * Pointer to private structure.
328 * Entry name relative to sysfs path.
330 * Value output buffer.
333 * 0 on success, -1 on failure and errno is set.
336 priv_get_sysfs_ulong(struct priv *priv, const char *name, unsigned long *value)
339 unsigned long value_ret;
342 ret = priv_sysfs_read(priv, name, value_str, (sizeof(value_str) - 1));
344 DEBUG("cannot read %s value from sysfs: %s",
345 name, strerror(errno));
348 value_str[ret] = '\0';
350 value_ret = strtoul(value_str, NULL, 0);
352 DEBUG("invalid %s value `%s': %s", name, value_str,
361 * Set unsigned long sysfs property.
364 * Pointer to private structure.
366 * Entry name relative to sysfs path.
371 * 0 on success, -1 on failure and errno is set.
374 priv_set_sysfs_ulong(struct priv *priv, const char *name, unsigned long value)
377 MKSTR(value_str, "%lu", value);
379 ret = priv_sysfs_write(priv, name, value_str, (sizeof(value_str) - 1));
381 DEBUG("cannot write %s `%s' (%lu) to sysfs: %s",
382 name, value_str, value, strerror(errno));
389 * Perform ifreq ioctl() on associated Ethernet device.
392 * Pointer to private structure.
394 * Request number to pass to ioctl().
396 * Interface request structure output buffer.
399 * 0 on success, -1 on failure and errno is set.
402 priv_ifreq(const struct priv *priv, int req, struct ifreq *ifr)
404 int sock = socket(PF_INET, SOCK_DGRAM, IPPROTO_IP);
409 if (priv_get_ifname(priv, &ifr->ifr_name) == 0)
410 ret = ioctl(sock, req, ifr);
419 * Pointer to private structure.
421 * MTU value output buffer.
424 * 0 on success, -1 on failure and errno is set.
427 priv_get_mtu(struct priv *priv, uint16_t *mtu)
429 unsigned long ulong_mtu;
431 if (priv_get_sysfs_ulong(priv, "mtu", &ulong_mtu) == -1)
441 * Pointer to private structure.
446 * 0 on success, -1 on failure and errno is set.
449 priv_set_mtu(struct priv *priv, uint16_t mtu)
453 if (priv_set_sysfs_ulong(priv, "mtu", mtu) ||
454 priv_get_mtu(priv, &new_mtu))
466 * Pointer to private structure.
468 * Bitmask for flags that must remain untouched.
470 * Bitmask for flags to modify.
473 * 0 on success, -1 on failure and errno is set.
476 priv_set_flags(struct priv *priv, unsigned int keep, unsigned int flags)
480 if (priv_get_sysfs_ulong(priv, "flags", &tmp) == -1)
483 tmp |= (flags & (~keep));
484 return priv_set_sysfs_ulong(priv, "flags", tmp);
487 /* Device configuration. */
490 txq_setup(struct rte_eth_dev *dev, struct txq *txq, uint16_t desc,
491 unsigned int socket, const struct rte_eth_txconf *conf);
494 txq_cleanup(struct txq *txq);
497 rxq_setup(struct rte_eth_dev *dev, struct rxq *rxq, uint16_t desc,
498 unsigned int socket, const struct rte_eth_rxconf *conf,
499 struct rte_mempool *mp);
502 rxq_cleanup(struct rxq *rxq);
505 priv_mac_addr_del(struct priv *priv);
508 * Ethernet device configuration.
510 * Prepare the driver for a given number of TX and RX queues.
513 * Pointer to Ethernet device structure.
516 * 0 on success, errno value on failure.
519 dev_configure(struct rte_eth_dev *dev)
521 struct priv *priv = dev->data->dev_private;
522 unsigned int rxqs_n = dev->data->nb_rx_queues;
523 unsigned int txqs_n = dev->data->nb_tx_queues;
525 priv->rxqs = (void *)dev->data->rx_queues;
526 priv->txqs = (void *)dev->data->tx_queues;
527 if (txqs_n != priv->txqs_n) {
528 INFO("%p: TX queues number update: %u -> %u",
529 (void *)dev, priv->txqs_n, txqs_n);
530 priv->txqs_n = txqs_n;
532 if (rxqs_n != priv->rxqs_n) {
533 INFO("%p: Rx queues number update: %u -> %u",
534 (void *)dev, priv->rxqs_n, rxqs_n);
535 priv->rxqs_n = rxqs_n;
541 * DPDK callback for Ethernet device configuration.
544 * Pointer to Ethernet device structure.
547 * 0 on success, negative errno value on failure.
550 mlx4_dev_configure(struct rte_eth_dev *dev)
552 struct priv *priv = dev->data->dev_private;
556 ret = dev_configure(dev);
562 static uint16_t mlx4_tx_burst(void *, struct rte_mbuf **, uint16_t);
563 static uint16_t removed_rx_burst(void *, struct rte_mbuf **, uint16_t);
565 /* TX queues handling. */
568 * Allocate TX queue elements.
571 * Pointer to TX queue structure.
573 * Number of elements to allocate.
576 * 0 on success, errno value on failure.
579 txq_alloc_elts(struct txq *txq, unsigned int elts_n)
582 struct txq_elt (*elts)[elts_n] =
583 rte_calloc_socket("TXQ", 1, sizeof(*elts), 0, txq->socket);
587 ERROR("%p: can't allocate packets array", (void *)txq);
591 for (i = 0; (i != elts_n); ++i) {
592 struct txq_elt *elt = &(*elts)[i];
596 DEBUG("%p: allocated and configured %u WRs", (void *)txq, elts_n);
597 txq->elts_n = elts_n;
602 /* Request send completion every MLX4_PMD_TX_PER_COMP_REQ packets or
603 * at least 4 times per ring. */
604 txq->elts_comp_cd_init =
605 ((MLX4_PMD_TX_PER_COMP_REQ < (elts_n / 4)) ?
606 MLX4_PMD_TX_PER_COMP_REQ : (elts_n / 4));
607 txq->elts_comp_cd = txq->elts_comp_cd_init;
613 DEBUG("%p: failed, freed everything", (void *)txq);
619 * Free TX queue elements.
622 * Pointer to TX queue structure.
625 txq_free_elts(struct txq *txq)
627 unsigned int elts_n = txq->elts_n;
628 unsigned int elts_head = txq->elts_head;
629 unsigned int elts_tail = txq->elts_tail;
630 struct txq_elt (*elts)[elts_n] = txq->elts;
632 DEBUG("%p: freeing WRs", (void *)txq);
637 txq->elts_comp_cd = 0;
638 txq->elts_comp_cd_init = 0;
642 while (elts_tail != elts_head) {
643 struct txq_elt *elt = &(*elts)[elts_tail];
645 assert(elt->buf != NULL);
646 rte_pktmbuf_free(elt->buf);
649 memset(elt, 0x77, sizeof(*elt));
651 if (++elts_tail == elts_n)
659 * Clean up a TX queue.
661 * Destroy objects, free allocated memory and reset the structure for reuse.
664 * Pointer to TX queue structure.
667 txq_cleanup(struct txq *txq)
671 DEBUG("cleaning up %p", (void *)txq);
674 claim_zero(ibv_destroy_qp(txq->qp));
676 claim_zero(ibv_destroy_cq(txq->cq));
677 for (i = 0; (i != elemof(txq->mp2mr)); ++i) {
678 if (txq->mp2mr[i].mp == NULL)
680 assert(txq->mp2mr[i].mr != NULL);
681 claim_zero(ibv_dereg_mr(txq->mp2mr[i].mr));
683 memset(txq, 0, sizeof(*txq));
687 * Manage TX completions.
689 * When sending a burst, mlx4_tx_burst() posts several WRs.
690 * To improve performance, a completion event is only required once every
691 * MLX4_PMD_TX_PER_COMP_REQ sends. Doing so discards completion information
692 * for other WRs, but this information would not be used anyway.
695 * Pointer to TX queue structure.
698 * 0 on success, -1 on failure.
701 txq_complete(struct txq *txq)
703 unsigned int elts_comp = txq->elts_comp;
704 unsigned int elts_tail = txq->elts_tail;
705 const unsigned int elts_n = txq->elts_n;
706 struct ibv_wc wcs[elts_comp];
709 if (unlikely(elts_comp == 0))
711 wcs_n = ibv_poll_cq(txq->cq, elts_comp, wcs);
712 if (unlikely(wcs_n == 0))
714 if (unlikely(wcs_n < 0)) {
715 DEBUG("%p: ibv_poll_cq() failed (wcs_n=%d)",
720 assert(elts_comp <= txq->elts_comp);
722 * Assume WC status is successful as nothing can be done about it
725 elts_tail += wcs_n * txq->elts_comp_cd_init;
726 if (elts_tail >= elts_n)
728 txq->elts_tail = elts_tail;
729 txq->elts_comp = elts_comp;
733 struct mlx4_check_mempool_data {
739 /* Called by mlx4_check_mempool() when iterating the memory chunks. */
740 static void mlx4_check_mempool_cb(struct rte_mempool *mp,
741 void *opaque, struct rte_mempool_memhdr *memhdr,
744 struct mlx4_check_mempool_data *data = opaque;
749 /* It already failed, skip the next chunks. */
752 /* It is the first chunk. */
753 if (data->start == NULL && data->end == NULL) {
754 data->start = memhdr->addr;
755 data->end = data->start + memhdr->len;
758 if (data->end == memhdr->addr) {
759 data->end += memhdr->len;
762 if (data->start == (char *)memhdr->addr + memhdr->len) {
763 data->start -= memhdr->len;
766 /* Error, mempool is not virtually contigous. */
771 * Check if a mempool can be used: it must be virtually contiguous.
774 * Pointer to memory pool.
776 * Pointer to the start address of the mempool virtual memory area
778 * Pointer to the end address of the mempool virtual memory area
781 * 0 on success (mempool is virtually contiguous), -1 on error.
783 static int mlx4_check_mempool(struct rte_mempool *mp, uintptr_t *start,
786 struct mlx4_check_mempool_data data;
788 memset(&data, 0, sizeof(data));
789 rte_mempool_mem_iter(mp, mlx4_check_mempool_cb, &data);
790 *start = (uintptr_t)data.start;
791 *end = (uintptr_t)data.end;
796 /* For best performance, this function should not be inlined. */
797 static struct ibv_mr *mlx4_mp2mr(struct ibv_pd *, struct rte_mempool *)
801 * Register mempool as a memory region.
804 * Pointer to protection domain.
806 * Pointer to memory pool.
809 * Memory region pointer, NULL in case of error.
811 static struct ibv_mr *
812 mlx4_mp2mr(struct ibv_pd *pd, struct rte_mempool *mp)
814 const struct rte_memseg *ms = rte_eal_get_physmem_layout();
819 if (mlx4_check_mempool(mp, &start, &end) != 0) {
820 ERROR("mempool %p: not virtually contiguous",
825 DEBUG("mempool %p area start=%p end=%p size=%zu",
826 (void *)mp, (void *)start, (void *)end,
827 (size_t)(end - start));
828 /* Round start and end to page boundary if found in memory segments. */
829 for (i = 0; (i < RTE_MAX_MEMSEG) && (ms[i].addr != NULL); ++i) {
830 uintptr_t addr = (uintptr_t)ms[i].addr;
831 size_t len = ms[i].len;
832 unsigned int align = ms[i].hugepage_sz;
834 if ((start > addr) && (start < addr + len))
835 start = RTE_ALIGN_FLOOR(start, align);
836 if ((end > addr) && (end < addr + len))
837 end = RTE_ALIGN_CEIL(end, align);
839 DEBUG("mempool %p using start=%p end=%p size=%zu for MR",
840 (void *)mp, (void *)start, (void *)end,
841 (size_t)(end - start));
842 return ibv_reg_mr(pd,
845 IBV_ACCESS_LOCAL_WRITE);
849 * Get Memory Pool (MP) from mbuf. If mbuf is indirect, the pool from which
850 * the cloned mbuf is allocated is returned instead.
856 * Memory pool where data is located for given mbuf.
858 static struct rte_mempool *
859 txq_mb2mp(struct rte_mbuf *buf)
861 if (unlikely(RTE_MBUF_INDIRECT(buf)))
862 return rte_mbuf_from_indirect(buf)->pool;
867 * Get Memory Region (MR) <-> Memory Pool (MP) association from txq->mp2mr[].
868 * Add MP to txq->mp2mr[] if it's not registered yet. If mp2mr[] is full,
869 * remove an entry first.
872 * Pointer to TX queue structure.
874 * Memory Pool for which a Memory Region lkey must be returned.
877 * mr->lkey on success, (uint32_t)-1 on failure.
880 txq_mp2mr(struct txq *txq, struct rte_mempool *mp)
885 for (i = 0; (i != elemof(txq->mp2mr)); ++i) {
886 if (unlikely(txq->mp2mr[i].mp == NULL)) {
887 /* Unknown MP, add a new MR for it. */
890 if (txq->mp2mr[i].mp == mp) {
891 assert(txq->mp2mr[i].lkey != (uint32_t)-1);
892 assert(txq->mp2mr[i].mr->lkey == txq->mp2mr[i].lkey);
893 return txq->mp2mr[i].lkey;
896 /* Add a new entry, register MR first. */
897 DEBUG("%p: discovered new memory pool \"%s\" (%p)",
898 (void *)txq, mp->name, (void *)mp);
899 mr = mlx4_mp2mr(txq->priv->pd, mp);
900 if (unlikely(mr == NULL)) {
901 DEBUG("%p: unable to configure MR, ibv_reg_mr() failed.",
905 if (unlikely(i == elemof(txq->mp2mr))) {
906 /* Table is full, remove oldest entry. */
907 DEBUG("%p: MR <-> MP table full, dropping oldest entry.",
910 claim_zero(ibv_dereg_mr(txq->mp2mr[0].mr));
911 memmove(&txq->mp2mr[0], &txq->mp2mr[1],
912 (sizeof(txq->mp2mr) - sizeof(txq->mp2mr[0])));
914 /* Store the new entry. */
915 txq->mp2mr[i].mp = mp;
916 txq->mp2mr[i].mr = mr;
917 txq->mp2mr[i].lkey = mr->lkey;
918 DEBUG("%p: new MR lkey for MP \"%s\" (%p): 0x%08" PRIu32,
919 (void *)txq, mp->name, (void *)mp, txq->mp2mr[i].lkey);
920 return txq->mp2mr[i].lkey;
923 struct txq_mp2mr_mbuf_check_data {
928 * Callback function for rte_mempool_obj_iter() to check whether a given
929 * mempool object looks like a mbuf.
932 * The mempool pointer
934 * Context data (struct txq_mp2mr_mbuf_check_data). Contains the
939 * Object index, unused.
942 txq_mp2mr_mbuf_check(struct rte_mempool *mp, void *arg, void *obj,
943 uint32_t index __rte_unused)
945 struct txq_mp2mr_mbuf_check_data *data = arg;
946 struct rte_mbuf *buf = obj;
948 /* Check whether mbuf structure fits element size and whether mempool
949 * pointer is valid. */
950 if (sizeof(*buf) > mp->elt_size || buf->pool != mp)
955 * Iterator function for rte_mempool_walk() to register existing mempools and
956 * fill the MP to MR cache of a TX queue.
959 * Memory Pool to register.
961 * Pointer to TX queue structure.
964 txq_mp2mr_iter(struct rte_mempool *mp, void *arg)
966 struct txq *txq = arg;
967 struct txq_mp2mr_mbuf_check_data data = {
971 /* Register mempool only if the first element looks like a mbuf. */
972 if (rte_mempool_obj_iter(mp, txq_mp2mr_mbuf_check, &data) == 0 ||
979 * DPDK callback for TX.
982 * Generic pointer to TX queue structure.
984 * Packets to transmit.
986 * Number of packets in array.
989 * Number of packets successfully transmitted (<= pkts_n).
992 mlx4_tx_burst(void *dpdk_txq, struct rte_mbuf **pkts, uint16_t pkts_n)
994 struct txq *txq = (struct txq *)dpdk_txq;
995 struct ibv_send_wr *wr_head = NULL;
996 struct ibv_send_wr **wr_next = &wr_head;
997 struct ibv_send_wr *wr_bad = NULL;
998 unsigned int elts_head = txq->elts_head;
999 const unsigned int elts_n = txq->elts_n;
1000 unsigned int elts_comp_cd = txq->elts_comp_cd;
1001 unsigned int elts_comp = 0;
1006 assert(elts_comp_cd != 0);
1008 max = (elts_n - (elts_head - txq->elts_tail));
1012 assert(max <= elts_n);
1013 /* Always leave one free entry in the ring. */
1019 for (i = 0; (i != max); ++i) {
1020 struct rte_mbuf *buf = pkts[i];
1021 unsigned int elts_head_next =
1022 (((elts_head + 1) == elts_n) ? 0 : elts_head + 1);
1023 struct txq_elt *elt_next = &(*txq->elts)[elts_head_next];
1024 struct txq_elt *elt = &(*txq->elts)[elts_head];
1025 struct ibv_send_wr *wr = &elt->wr;
1026 unsigned int segs = NB_SEGS(buf);
1027 unsigned int sent_size = 0;
1028 uint32_t send_flags = 0;
1030 /* Clean up old buffer. */
1031 if (likely(elt->buf != NULL)) {
1032 struct rte_mbuf *tmp = elt->buf;
1036 memset(elt, 0x66, sizeof(*elt));
1038 /* Faster than rte_pktmbuf_free(). */
1040 struct rte_mbuf *next = NEXT(tmp);
1042 rte_pktmbuf_free_seg(tmp);
1044 } while (tmp != NULL);
1046 /* Request TX completion. */
1047 if (unlikely(--elts_comp_cd == 0)) {
1048 elts_comp_cd = txq->elts_comp_cd_init;
1050 send_flags |= IBV_SEND_SIGNALED;
1052 if (likely(segs == 1)) {
1053 struct ibv_sge *sge = &elt->sge;
1058 /* Retrieve buffer information. */
1059 addr = rte_pktmbuf_mtod(buf, uintptr_t);
1060 length = DATA_LEN(buf);
1061 /* Retrieve Memory Region key for this memory pool. */
1062 lkey = txq_mp2mr(txq, txq_mb2mp(buf));
1063 if (unlikely(lkey == (uint32_t)-1)) {
1064 /* MR does not exist. */
1065 DEBUG("%p: unable to get MP <-> MR"
1066 " association", (void *)txq);
1067 /* Clean up TX element. */
1071 /* Update element. */
1074 rte_prefetch0((volatile void *)
1076 RTE_MBUF_PREFETCH_TO_FREE(elt_next->buf);
1078 sge->length = length;
1080 sent_size += length;
1085 if (sent_size <= txq->max_inline)
1086 send_flags |= IBV_SEND_INLINE;
1087 elts_head = elts_head_next;
1088 /* Increment sent bytes counter. */
1089 txq->stats.obytes += sent_size;
1091 wr->sg_list = &elt->sge;
1093 wr->opcode = IBV_WR_SEND;
1094 wr->send_flags = send_flags;
1096 wr_next = &wr->next;
1099 /* Take a shortcut if nothing must be sent. */
1100 if (unlikely(i == 0))
1102 /* Increment sent packets counter. */
1103 txq->stats.opackets += i;
1104 /* Ring QP doorbell. */
1107 err = ibv_post_send(txq->qp, wr_head, &wr_bad);
1108 if (unlikely(err)) {
1109 uint64_t obytes = 0;
1110 uint64_t opackets = 0;
1112 /* Rewind bad WRs. */
1113 while (wr_bad != NULL) {
1116 /* Force completion request if one was lost. */
1117 if (wr_bad->send_flags & IBV_SEND_SIGNALED) {
1122 for (j = 0; j < wr_bad->num_sge; ++j)
1123 obytes += wr_bad->sg_list[j].length;
1124 elts_head = (elts_head ? elts_head : elts_n) - 1;
1125 wr_bad = wr_bad->next;
1127 txq->stats.opackets -= opackets;
1128 txq->stats.obytes -= obytes;
1130 DEBUG("%p: ibv_post_send() failed, %" PRIu64 " packets"
1131 " (%" PRIu64 " bytes) rejected: %s",
1135 (err <= -1) ? "Internal error" : strerror(err));
1137 txq->elts_head = elts_head;
1138 txq->elts_comp += elts_comp;
1139 txq->elts_comp_cd = elts_comp_cd;
1144 * Configure a TX queue.
1147 * Pointer to Ethernet device structure.
1149 * Pointer to TX queue structure.
1151 * Number of descriptors to configure in queue.
1153 * NUMA socket on which memory must be allocated.
1155 * Thresholds parameters.
1158 * 0 on success, errno value on failure.
1161 txq_setup(struct rte_eth_dev *dev, struct txq *txq, uint16_t desc,
1162 unsigned int socket, const struct rte_eth_txconf *conf)
1164 struct priv *priv = dev->data->dev_private;
1170 struct ibv_qp_init_attr init;
1171 struct ibv_qp_attr mod;
1175 (void)conf; /* Thresholds configuration (ignored). */
1179 ERROR("%p: invalid number of Tx descriptors", (void *)dev);
1182 /* MRs will be registered in mp2mr[] later. */
1183 tmpl.cq = ibv_create_cq(priv->ctx, desc, NULL, NULL, 0);
1184 if (tmpl.cq == NULL) {
1186 ERROR("%p: CQ creation failure: %s",
1187 (void *)dev, strerror(ret));
1190 DEBUG("priv->device_attr.max_qp_wr is %d",
1191 priv->device_attr.max_qp_wr);
1192 DEBUG("priv->device_attr.max_sge is %d",
1193 priv->device_attr.max_sge);
1194 attr.init = (struct ibv_qp_init_attr){
1195 /* CQ to be associated with the send queue. */
1197 /* CQ to be associated with the receive queue. */
1200 /* Max number of outstanding WRs. */
1201 .max_send_wr = ((priv->device_attr.max_qp_wr < desc) ?
1202 priv->device_attr.max_qp_wr :
1204 /* Max number of scatter/gather elements in a WR. */
1206 .max_inline_data = MLX4_PMD_MAX_INLINE,
1208 .qp_type = IBV_QPT_RAW_PACKET,
1209 /* Do *NOT* enable this, completions events are managed per
1213 tmpl.qp = ibv_create_qp(priv->pd, &attr.init);
1214 if (tmpl.qp == NULL) {
1215 ret = (errno ? errno : EINVAL);
1216 ERROR("%p: QP creation failure: %s",
1217 (void *)dev, strerror(ret));
1220 /* ibv_create_qp() updates this value. */
1221 tmpl.max_inline = attr.init.cap.max_inline_data;
1222 attr.mod = (struct ibv_qp_attr){
1223 /* Move the QP to this state. */
1224 .qp_state = IBV_QPS_INIT,
1225 /* Primary port number. */
1226 .port_num = priv->port
1228 ret = ibv_modify_qp(tmpl.qp, &attr.mod, IBV_QP_STATE | IBV_QP_PORT);
1230 ERROR("%p: QP state to IBV_QPS_INIT failed: %s",
1231 (void *)dev, strerror(ret));
1234 ret = txq_alloc_elts(&tmpl, desc);
1236 ERROR("%p: TXQ allocation failed: %s",
1237 (void *)dev, strerror(ret));
1240 attr.mod = (struct ibv_qp_attr){
1241 .qp_state = IBV_QPS_RTR
1243 ret = ibv_modify_qp(tmpl.qp, &attr.mod, IBV_QP_STATE);
1245 ERROR("%p: QP state to IBV_QPS_RTR failed: %s",
1246 (void *)dev, strerror(ret));
1249 attr.mod.qp_state = IBV_QPS_RTS;
1250 ret = ibv_modify_qp(tmpl.qp, &attr.mod, IBV_QP_STATE);
1252 ERROR("%p: QP state to IBV_QPS_RTS failed: %s",
1253 (void *)dev, strerror(ret));
1256 /* Clean up txq in case we're reinitializing it. */
1257 DEBUG("%p: cleaning-up old txq just in case", (void *)txq);
1260 DEBUG("%p: txq updated with %p", (void *)txq, (void *)&tmpl);
1261 /* Pre-register known mempools. */
1262 rte_mempool_walk(txq_mp2mr_iter, txq);
1272 * DPDK callback to configure a TX queue.
1275 * Pointer to Ethernet device structure.
1279 * Number of descriptors to configure in queue.
1281 * NUMA socket on which memory must be allocated.
1283 * Thresholds parameters.
1286 * 0 on success, negative errno value on failure.
1289 mlx4_tx_queue_setup(struct rte_eth_dev *dev, uint16_t idx, uint16_t desc,
1290 unsigned int socket, const struct rte_eth_txconf *conf)
1292 struct priv *priv = dev->data->dev_private;
1293 struct txq *txq = (*priv->txqs)[idx];
1297 DEBUG("%p: configuring queue %u for %u descriptors",
1298 (void *)dev, idx, desc);
1299 if (idx >= priv->txqs_n) {
1300 ERROR("%p: queue index out of range (%u >= %u)",
1301 (void *)dev, idx, priv->txqs_n);
1306 DEBUG("%p: reusing already allocated queue index %u (%p)",
1307 (void *)dev, idx, (void *)txq);
1308 if (priv->started) {
1312 (*priv->txqs)[idx] = NULL;
1315 txq = rte_calloc_socket("TXQ", 1, sizeof(*txq), 0, socket);
1317 ERROR("%p: unable to allocate queue index %u",
1323 ret = txq_setup(dev, txq, desc, socket, conf);
1327 txq->stats.idx = idx;
1328 DEBUG("%p: adding TX queue %p to list",
1329 (void *)dev, (void *)txq);
1330 (*priv->txqs)[idx] = txq;
1331 /* Update send callback. */
1332 dev->tx_pkt_burst = mlx4_tx_burst;
1339 * DPDK callback to release a TX queue.
1342 * Generic TX queue pointer.
1345 mlx4_tx_queue_release(void *dpdk_txq)
1347 struct txq *txq = (struct txq *)dpdk_txq;
1355 for (i = 0; (i != priv->txqs_n); ++i)
1356 if ((*priv->txqs)[i] == txq) {
1357 DEBUG("%p: removing TX queue %p from list",
1358 (void *)priv->dev, (void *)txq);
1359 (*priv->txqs)[i] = NULL;
1367 /* RX queues handling. */
1370 * Allocate RX queue elements.
1373 * Pointer to RX queue structure.
1375 * Number of elements to allocate.
1378 * 0 on success, errno value on failure.
1381 rxq_alloc_elts(struct rxq *rxq, unsigned int elts_n)
1384 struct rxq_elt (*elts)[elts_n] =
1385 rte_calloc_socket("RXQ elements", 1, sizeof(*elts), 0,
1390 ERROR("%p: can't allocate packets array", (void *)rxq);
1394 /* For each WR (packet). */
1395 for (i = 0; (i != elts_n); ++i) {
1396 struct rxq_elt *elt = &(*elts)[i];
1397 struct ibv_recv_wr *wr = &elt->wr;
1398 struct ibv_sge *sge = &(*elts)[i].sge;
1399 struct rte_mbuf *buf = rte_pktmbuf_alloc(rxq->mp);
1402 ERROR("%p: empty mbuf pool", (void *)rxq);
1406 /* Configure WR. Work request ID contains its own index in
1407 * the elts array and the offset between SGE buffer header and
1409 WR_ID(wr->wr_id).id = i;
1410 WR_ID(wr->wr_id).offset =
1411 (((uintptr_t)buf->buf_addr + RTE_PKTMBUF_HEADROOM) -
1413 wr->next = &(*elts)[(i + 1)].wr;
1416 /* Headroom is reserved by rte_pktmbuf_alloc(). */
1417 assert(DATA_OFF(buf) == RTE_PKTMBUF_HEADROOM);
1418 /* Buffer is supposed to be empty. */
1419 assert(rte_pktmbuf_data_len(buf) == 0);
1420 assert(rte_pktmbuf_pkt_len(buf) == 0);
1421 /* sge->addr must be able to store a pointer. */
1422 assert(sizeof(sge->addr) >= sizeof(uintptr_t));
1423 /* SGE keeps its headroom. */
1424 sge->addr = (uintptr_t)
1425 ((uint8_t *)buf->buf_addr + RTE_PKTMBUF_HEADROOM);
1426 sge->length = (buf->buf_len - RTE_PKTMBUF_HEADROOM);
1427 sge->lkey = rxq->mr->lkey;
1428 /* Redundant check for tailroom. */
1429 assert(sge->length == rte_pktmbuf_tailroom(buf));
1430 /* Make sure elts index and SGE mbuf pointer can be deduced
1432 if ((WR_ID(wr->wr_id).id != i) ||
1433 ((void *)((uintptr_t)sge->addr -
1434 WR_ID(wr->wr_id).offset) != buf)) {
1435 ERROR("%p: cannot store index and offset in WR ID",
1438 rte_pktmbuf_free(buf);
1443 /* The last WR pointer must be NULL. */
1444 (*elts)[(i - 1)].wr.next = NULL;
1445 DEBUG("%p: allocated and configured %u single-segment WRs",
1446 (void *)rxq, elts_n);
1447 rxq->elts_n = elts_n;
1454 for (i = 0; (i != elemof(*elts)); ++i) {
1455 struct rxq_elt *elt = &(*elts)[i];
1456 struct rte_mbuf *buf;
1458 if (elt->sge.addr == 0)
1460 assert(WR_ID(elt->wr.wr_id).id == i);
1461 buf = (void *)((uintptr_t)elt->sge.addr -
1462 WR_ID(elt->wr.wr_id).offset);
1463 rte_pktmbuf_free_seg(buf);
1467 DEBUG("%p: failed, freed everything", (void *)rxq);
1473 * Free RX queue elements.
1476 * Pointer to RX queue structure.
1479 rxq_free_elts(struct rxq *rxq)
1482 unsigned int elts_n = rxq->elts_n;
1483 struct rxq_elt (*elts)[elts_n] = rxq->elts;
1485 DEBUG("%p: freeing WRs", (void *)rxq);
1490 for (i = 0; (i != elemof(*elts)); ++i) {
1491 struct rxq_elt *elt = &(*elts)[i];
1492 struct rte_mbuf *buf;
1494 if (elt->sge.addr == 0)
1496 assert(WR_ID(elt->wr.wr_id).id == i);
1497 buf = (void *)((uintptr_t)elt->sge.addr -
1498 WR_ID(elt->wr.wr_id).offset);
1499 rte_pktmbuf_free_seg(buf);
1505 * Unregister a MAC address.
1508 * Pointer to private structure.
1511 priv_mac_addr_del(struct priv *priv)
1514 uint8_t (*mac)[ETHER_ADDR_LEN] = &priv->mac.addr_bytes;
1517 if (!priv->mac_flow)
1519 DEBUG("%p: removing MAC address %02x:%02x:%02x:%02x:%02x:%02x",
1521 (*mac)[0], (*mac)[1], (*mac)[2], (*mac)[3], (*mac)[4], (*mac)[5]);
1522 claim_zero(ibv_destroy_flow(priv->mac_flow));
1523 priv->mac_flow = NULL;
1527 * Register a MAC address.
1529 * The MAC address is registered in queue 0.
1532 * Pointer to private structure.
1535 * 0 on success, errno value on failure.
1538 priv_mac_addr_add(struct priv *priv)
1540 uint8_t (*mac)[ETHER_ADDR_LEN] = &priv->mac.addr_bytes;
1542 struct ibv_flow *flow;
1544 /* If device isn't started, this is all we need to do. */
1549 if (*priv->rxqs && (*priv->rxqs)[0])
1550 rxq = (*priv->rxqs)[0];
1554 /* Allocate flow specification on the stack. */
1555 struct __attribute__((packed)) {
1556 struct ibv_flow_attr attr;
1557 struct ibv_flow_spec_eth spec;
1559 struct ibv_flow_attr *attr = &data.attr;
1560 struct ibv_flow_spec_eth *spec = &data.spec;
1563 priv_mac_addr_del(priv);
1565 * No padding must be inserted by the compiler between attr and spec.
1566 * This layout is expected by libibverbs.
1568 assert(((uint8_t *)attr + sizeof(*attr)) == (uint8_t *)spec);
1569 *attr = (struct ibv_flow_attr){
1570 .type = IBV_FLOW_ATTR_NORMAL,
1576 *spec = (struct ibv_flow_spec_eth){
1577 .type = IBV_FLOW_SPEC_ETH,
1578 .size = sizeof(*spec),
1581 (*mac)[0], (*mac)[1], (*mac)[2],
1582 (*mac)[3], (*mac)[4], (*mac)[5]
1586 .dst_mac = "\xff\xff\xff\xff\xff\xff",
1589 DEBUG("%p: adding MAC address %02x:%02x:%02x:%02x:%02x:%02x",
1591 (*mac)[0], (*mac)[1], (*mac)[2], (*mac)[3], (*mac)[4], (*mac)[5]);
1592 /* Create related flow. */
1594 flow = ibv_create_flow(rxq->qp, attr);
1596 /* It's not clear whether errno is always set in this case. */
1597 ERROR("%p: flow configuration failed, errno=%d: %s",
1599 (errno ? strerror(errno) : "Unknown error"));
1604 assert(priv->mac_flow == NULL);
1605 priv->mac_flow = flow;
1610 * Clean up a RX queue.
1612 * Destroy objects, free allocated memory and reset the structure for reuse.
1615 * Pointer to RX queue structure.
1618 rxq_cleanup(struct rxq *rxq)
1620 struct ibv_exp_release_intf_params params;
1622 DEBUG("cleaning up %p", (void *)rxq);
1624 if (rxq->if_qp != NULL) {
1625 assert(rxq->priv != NULL);
1626 assert(rxq->priv->ctx != NULL);
1627 assert(rxq->qp != NULL);
1628 params = (struct ibv_exp_release_intf_params){
1631 claim_zero(ibv_exp_release_intf(rxq->priv->ctx,
1635 if (rxq->if_cq != NULL) {
1636 assert(rxq->priv != NULL);
1637 assert(rxq->priv->ctx != NULL);
1638 assert(rxq->cq != NULL);
1639 params = (struct ibv_exp_release_intf_params){
1642 claim_zero(ibv_exp_release_intf(rxq->priv->ctx,
1646 if (rxq->qp != NULL)
1647 claim_zero(ibv_destroy_qp(rxq->qp));
1648 if (rxq->cq != NULL)
1649 claim_zero(ibv_destroy_cq(rxq->cq));
1650 if (rxq->channel != NULL)
1651 claim_zero(ibv_destroy_comp_channel(rxq->channel));
1652 if (rxq->mr != NULL)
1653 claim_zero(ibv_dereg_mr(rxq->mr));
1654 memset(rxq, 0, sizeof(*rxq));
1658 * DPDK callback for RX.
1660 * The following function doesn't manage scattered packets.
1663 * Generic pointer to RX queue structure.
1665 * Array to store received packets.
1667 * Maximum number of packets in array.
1670 * Number of packets successfully received (<= pkts_n).
1673 mlx4_rx_burst(void *dpdk_rxq, struct rte_mbuf **pkts, uint16_t pkts_n)
1675 struct rxq *rxq = (struct rxq *)dpdk_rxq;
1676 struct rxq_elt (*elts)[rxq->elts_n] = rxq->elts;
1677 const unsigned int elts_n = rxq->elts_n;
1678 unsigned int elts_head = rxq->elts_head;
1679 struct ibv_sge sges[pkts_n];
1681 unsigned int pkts_ret = 0;
1684 for (i = 0; (i != pkts_n); ++i) {
1685 struct rxq_elt *elt = &(*elts)[elts_head];
1686 struct ibv_recv_wr *wr = &elt->wr;
1687 uint64_t wr_id = wr->wr_id;
1689 struct rte_mbuf *seg = (void *)((uintptr_t)elt->sge.addr -
1690 WR_ID(wr_id).offset);
1691 struct rte_mbuf *rep;
1694 /* Sanity checks. */
1695 assert(WR_ID(wr_id).id < rxq->elts_n);
1696 assert(wr->sg_list == &elt->sge);
1697 assert(wr->num_sge == 1);
1698 assert(elts_head < rxq->elts_n);
1699 assert(rxq->elts_head < rxq->elts_n);
1701 * Fetch initial bytes of packet descriptor into a
1702 * cacheline while allocating rep.
1704 rte_mbuf_prefetch_part1(seg);
1705 rte_mbuf_prefetch_part2(seg);
1706 ret = rxq->if_cq->poll_length_flags(rxq->cq, NULL, NULL,
1708 if (unlikely(ret < 0)) {
1712 DEBUG("rxq=%p, poll_length() failed (ret=%d)",
1714 /* ibv_poll_cq() must be used in case of failure. */
1715 wcs_n = ibv_poll_cq(rxq->cq, 1, &wc);
1716 if (unlikely(wcs_n == 0))
1718 if (unlikely(wcs_n < 0)) {
1719 DEBUG("rxq=%p, ibv_poll_cq() failed (wcs_n=%d)",
1720 (void *)rxq, wcs_n);
1724 if (unlikely(wc.status != IBV_WC_SUCCESS)) {
1725 /* Whatever, just repost the offending WR. */
1726 DEBUG("rxq=%p, wr_id=%" PRIu64 ": bad work"
1727 " completion status (%d): %s",
1728 (void *)rxq, wc.wr_id, wc.status,
1729 ibv_wc_status_str(wc.status));
1730 /* Increment dropped packets counter. */
1731 ++rxq->stats.idropped;
1732 /* Add SGE to array for repost. */
1741 rep = rte_mbuf_raw_alloc(rxq->mp);
1742 if (unlikely(rep == NULL)) {
1744 * Unable to allocate a replacement mbuf,
1747 DEBUG("rxq=%p, wr_id=%" PRIu32 ":"
1748 " can't allocate a new mbuf",
1749 (void *)rxq, WR_ID(wr_id).id);
1750 /* Increase out of memory counters. */
1751 ++rxq->stats.rx_nombuf;
1752 ++rxq->priv->dev->data->rx_mbuf_alloc_failed;
1753 /* Add SGE to array for repost. */
1758 /* Reconfigure sge to use rep instead of seg. */
1759 elt->sge.addr = (uintptr_t)rep->buf_addr + RTE_PKTMBUF_HEADROOM;
1760 assert(elt->sge.lkey == rxq->mr->lkey);
1761 WR_ID(wr->wr_id).offset =
1762 (((uintptr_t)rep->buf_addr + RTE_PKTMBUF_HEADROOM) -
1764 assert(WR_ID(wr->wr_id).id == WR_ID(wr_id).id);
1766 /* Add SGE to array for repost. */
1769 /* Update seg information. */
1770 SET_DATA_OFF(seg, RTE_PKTMBUF_HEADROOM);
1772 PORT(seg) = rxq->port_id;
1775 DATA_LEN(seg) = len;
1776 seg->packet_type = 0;
1779 /* Return packet. */
1782 /* Increase bytes counter. */
1783 rxq->stats.ibytes += len;
1785 if (++elts_head >= elts_n)
1789 if (unlikely(i == 0))
1792 ret = rxq->if_qp->recv_burst(rxq->qp, sges, i);
1793 if (unlikely(ret)) {
1794 /* Inability to repost WRs is fatal. */
1795 DEBUG("%p: recv_burst(): failed (ret=%d)",
1800 rxq->elts_head = elts_head;
1801 /* Increase packets counter. */
1802 rxq->stats.ipackets += pkts_ret;
1807 * Allocate a Queue Pair.
1808 * Optionally setup inline receive if supported.
1811 * Pointer to private structure.
1813 * Completion queue to associate with QP.
1815 * Number of descriptors in QP (hint only).
1818 * QP pointer or NULL in case of error.
1820 static struct ibv_qp *
1821 rxq_setup_qp(struct priv *priv, struct ibv_cq *cq, uint16_t desc)
1823 struct ibv_qp_init_attr attr = {
1824 /* CQ to be associated with the send queue. */
1826 /* CQ to be associated with the receive queue. */
1829 /* Max number of outstanding WRs. */
1830 .max_recv_wr = ((priv->device_attr.max_qp_wr < desc) ?
1831 priv->device_attr.max_qp_wr :
1833 /* Max number of scatter/gather elements in a WR. */
1836 .qp_type = IBV_QPT_RAW_PACKET,
1839 return ibv_create_qp(priv->pd, &attr);
1843 * Configure a RX queue.
1846 * Pointer to Ethernet device structure.
1848 * Pointer to RX queue structure.
1850 * Number of descriptors to configure in queue.
1852 * NUMA socket on which memory must be allocated.
1854 * Thresholds parameters.
1856 * Memory pool for buffer allocations.
1859 * 0 on success, errno value on failure.
1862 rxq_setup(struct rte_eth_dev *dev, struct rxq *rxq, uint16_t desc,
1863 unsigned int socket, const struct rte_eth_rxconf *conf,
1864 struct rte_mempool *mp)
1866 struct priv *priv = dev->data->dev_private;
1872 struct ibv_qp_attr mod;
1874 struct ibv_exp_query_intf_params params;
1876 enum ibv_exp_query_intf_status status;
1877 struct ibv_recv_wr *bad_wr;
1878 unsigned int mb_len;
1881 (void)conf; /* Thresholds configuration (ignored). */
1882 mb_len = rte_pktmbuf_data_room_size(mp);
1884 ERROR("%p: invalid number of Rx descriptors", (void *)dev);
1887 /* Enable scattered packets support for this queue if necessary. */
1888 assert(mb_len >= RTE_PKTMBUF_HEADROOM);
1889 if (dev->data->dev_conf.rxmode.max_rx_pkt_len <=
1890 (mb_len - RTE_PKTMBUF_HEADROOM)) {
1892 } else if (dev->data->dev_conf.rxmode.enable_scatter) {
1893 WARN("%p: scattered mode has been requested but is"
1894 " not supported, this may lead to packet loss",
1897 WARN("%p: the requested maximum Rx packet size (%u) is"
1898 " larger than a single mbuf (%u) and scattered"
1899 " mode has not been requested",
1901 dev->data->dev_conf.rxmode.max_rx_pkt_len,
1902 mb_len - RTE_PKTMBUF_HEADROOM);
1904 /* Use the entire RX mempool as the memory region. */
1905 tmpl.mr = mlx4_mp2mr(priv->pd, mp);
1906 if (tmpl.mr == NULL) {
1908 ERROR("%p: MR creation failure: %s",
1909 (void *)dev, strerror(ret));
1912 if (dev->data->dev_conf.intr_conf.rxq) {
1913 tmpl.channel = ibv_create_comp_channel(priv->ctx);
1914 if (tmpl.channel == NULL) {
1916 ERROR("%p: Rx interrupt completion channel creation"
1918 (void *)dev, strerror(ret));
1922 tmpl.cq = ibv_create_cq(priv->ctx, desc, NULL, tmpl.channel, 0);
1923 if (tmpl.cq == NULL) {
1925 ERROR("%p: CQ creation failure: %s",
1926 (void *)dev, strerror(ret));
1929 DEBUG("priv->device_attr.max_qp_wr is %d",
1930 priv->device_attr.max_qp_wr);
1931 DEBUG("priv->device_attr.max_sge is %d",
1932 priv->device_attr.max_sge);
1933 tmpl.qp = rxq_setup_qp(priv, tmpl.cq, desc);
1934 if (tmpl.qp == NULL) {
1935 ret = (errno ? errno : EINVAL);
1936 ERROR("%p: QP creation failure: %s",
1937 (void *)dev, strerror(ret));
1940 mod = (struct ibv_qp_attr){
1941 /* Move the QP to this state. */
1942 .qp_state = IBV_QPS_INIT,
1943 /* Primary port number. */
1944 .port_num = priv->port
1946 ret = ibv_modify_qp(tmpl.qp, &mod, IBV_QP_STATE | IBV_QP_PORT);
1948 ERROR("%p: QP state to IBV_QPS_INIT failed: %s",
1949 (void *)dev, strerror(ret));
1952 ret = rxq_alloc_elts(&tmpl, desc);
1954 ERROR("%p: RXQ allocation failed: %s",
1955 (void *)dev, strerror(ret));
1958 ret = ibv_post_recv(tmpl.qp, &(*tmpl.elts)[0].wr, &bad_wr);
1960 ERROR("%p: ibv_post_recv() failed for WR %p: %s",
1966 mod = (struct ibv_qp_attr){
1967 .qp_state = IBV_QPS_RTR
1969 ret = ibv_modify_qp(tmpl.qp, &mod, IBV_QP_STATE);
1971 ERROR("%p: QP state to IBV_QPS_RTR failed: %s",
1972 (void *)dev, strerror(ret));
1976 tmpl.port_id = dev->data->port_id;
1977 DEBUG("%p: RTE port ID: %u", (void *)rxq, tmpl.port_id);
1978 attr.params = (struct ibv_exp_query_intf_params){
1979 .intf_scope = IBV_EXP_INTF_GLOBAL,
1980 .intf = IBV_EXP_INTF_CQ,
1983 tmpl.if_cq = ibv_exp_query_intf(priv->ctx, &attr.params, &status);
1984 if (tmpl.if_cq == NULL) {
1985 ERROR("%p: CQ interface family query failed with status %d",
1986 (void *)dev, status);
1989 attr.params = (struct ibv_exp_query_intf_params){
1990 .intf_scope = IBV_EXP_INTF_GLOBAL,
1991 .intf = IBV_EXP_INTF_QP_BURST,
1994 tmpl.if_qp = ibv_exp_query_intf(priv->ctx, &attr.params, &status);
1995 if (tmpl.if_qp == NULL) {
1996 ERROR("%p: QP interface family query failed with status %d",
1997 (void *)dev, status);
2000 /* Clean up rxq in case we're reinitializing it. */
2001 DEBUG("%p: cleaning-up old rxq just in case", (void *)rxq);
2004 DEBUG("%p: rxq updated with %p", (void *)rxq, (void *)&tmpl);
2014 * DPDK callback to configure a RX queue.
2017 * Pointer to Ethernet device structure.
2021 * Number of descriptors to configure in queue.
2023 * NUMA socket on which memory must be allocated.
2025 * Thresholds parameters.
2027 * Memory pool for buffer allocations.
2030 * 0 on success, negative errno value on failure.
2033 mlx4_rx_queue_setup(struct rte_eth_dev *dev, uint16_t idx, uint16_t desc,
2034 unsigned int socket, const struct rte_eth_rxconf *conf,
2035 struct rte_mempool *mp)
2037 struct priv *priv = dev->data->dev_private;
2038 struct rxq *rxq = (*priv->rxqs)[idx];
2042 DEBUG("%p: configuring queue %u for %u descriptors",
2043 (void *)dev, idx, desc);
2044 if (idx >= priv->rxqs_n) {
2045 ERROR("%p: queue index out of range (%u >= %u)",
2046 (void *)dev, idx, priv->rxqs_n);
2051 DEBUG("%p: reusing already allocated queue index %u (%p)",
2052 (void *)dev, idx, (void *)rxq);
2053 if (priv->started) {
2057 (*priv->rxqs)[idx] = NULL;
2059 priv_mac_addr_del(priv);
2062 rxq = rte_calloc_socket("RXQ", 1, sizeof(*rxq), 0, socket);
2064 ERROR("%p: unable to allocate queue index %u",
2070 ret = rxq_setup(dev, rxq, desc, socket, conf, mp);
2074 rxq->stats.idx = idx;
2075 DEBUG("%p: adding RX queue %p to list",
2076 (void *)dev, (void *)rxq);
2077 (*priv->rxqs)[idx] = rxq;
2078 /* Update receive callback. */
2079 dev->rx_pkt_burst = mlx4_rx_burst;
2086 * DPDK callback to release a RX queue.
2089 * Generic RX queue pointer.
2092 mlx4_rx_queue_release(void *dpdk_rxq)
2094 struct rxq *rxq = (struct rxq *)dpdk_rxq;
2102 for (i = 0; (i != priv->rxqs_n); ++i)
2103 if ((*priv->rxqs)[i] == rxq) {
2104 DEBUG("%p: removing RX queue %p from list",
2105 (void *)priv->dev, (void *)rxq);
2106 (*priv->rxqs)[i] = NULL;
2108 priv_mac_addr_del(priv);
2117 priv_dev_interrupt_handler_install(struct priv *, struct rte_eth_dev *);
2120 priv_dev_removal_interrupt_handler_install(struct priv *, struct rte_eth_dev *);
2123 priv_dev_link_interrupt_handler_install(struct priv *, struct rte_eth_dev *);
2126 * DPDK callback to start the device.
2128 * Simulate device start by attaching all configured flows.
2131 * Pointer to Ethernet device structure.
2134 * 0 on success, negative errno value on failure.
2137 mlx4_dev_start(struct rte_eth_dev *dev)
2139 struct priv *priv = dev->data->dev_private;
2143 if (priv->started) {
2147 DEBUG("%p: attaching configured flows to all RX queues", (void *)dev);
2149 ret = priv_mac_addr_add(priv);
2152 ret = priv_dev_link_interrupt_handler_install(priv, dev);
2154 ERROR("%p: LSC handler install failed",
2158 ret = priv_dev_removal_interrupt_handler_install(priv, dev);
2160 ERROR("%p: RMV handler install failed",
2164 ret = priv_rx_intr_vec_enable(priv);
2166 ERROR("%p: Rx interrupt vector creation failed",
2170 ret = mlx4_priv_flow_start(priv);
2172 ERROR("%p: flow start failed: %s",
2173 (void *)dev, strerror(ret));
2180 priv_mac_addr_del(priv);
2187 * DPDK callback to stop the device.
2189 * Simulate device stop by detaching all configured flows.
2192 * Pointer to Ethernet device structure.
2195 mlx4_dev_stop(struct rte_eth_dev *dev)
2197 struct priv *priv = dev->data->dev_private;
2200 if (!priv->started) {
2204 DEBUG("%p: detaching flows from all RX queues", (void *)dev);
2206 mlx4_priv_flow_stop(priv);
2207 priv_mac_addr_del(priv);
2212 * Dummy DPDK callback for TX.
2214 * This function is used to temporarily replace the real callback during
2215 * unsafe control operations on the queue, or in case of error.
2218 * Generic pointer to TX queue structure.
2220 * Packets to transmit.
2222 * Number of packets in array.
2225 * Number of packets successfully transmitted (<= pkts_n).
2228 removed_tx_burst(void *dpdk_txq, struct rte_mbuf **pkts, uint16_t pkts_n)
2237 * Dummy DPDK callback for RX.
2239 * This function is used to temporarily replace the real callback during
2240 * unsafe control operations on the queue, or in case of error.
2243 * Generic pointer to RX queue structure.
2245 * Array to store received packets.
2247 * Maximum number of packets in array.
2250 * Number of packets successfully received (<= pkts_n).
2253 removed_rx_burst(void *dpdk_rxq, struct rte_mbuf **pkts, uint16_t pkts_n)
2262 priv_dev_interrupt_handler_uninstall(struct priv *, struct rte_eth_dev *);
2265 priv_dev_removal_interrupt_handler_uninstall(struct priv *,
2266 struct rte_eth_dev *);
2269 priv_dev_link_interrupt_handler_uninstall(struct priv *, struct rte_eth_dev *);
2272 * DPDK callback to close the device.
2274 * Destroy all queues and objects, free memory.
2277 * Pointer to Ethernet device structure.
2280 mlx4_dev_close(struct rte_eth_dev *dev)
2282 struct priv *priv = dev->data->dev_private;
2289 DEBUG("%p: closing device \"%s\"",
2291 ((priv->ctx != NULL) ? priv->ctx->device->name : ""));
2292 priv_mac_addr_del(priv);
2293 /* Prevent crashes when queues are still in use. This is unfortunately
2294 * still required for DPDK 1.3 because some programs (such as testpmd)
2295 * never release them before closing the device. */
2296 dev->rx_pkt_burst = removed_rx_burst;
2297 dev->tx_pkt_burst = removed_tx_burst;
2298 if (priv->rxqs != NULL) {
2299 /* XXX race condition if mlx4_rx_burst() is still running. */
2301 for (i = 0; (i != priv->rxqs_n); ++i) {
2302 tmp = (*priv->rxqs)[i];
2305 (*priv->rxqs)[i] = NULL;
2312 if (priv->txqs != NULL) {
2313 /* XXX race condition if mlx4_tx_burst() is still running. */
2315 for (i = 0; (i != priv->txqs_n); ++i) {
2316 tmp = (*priv->txqs)[i];
2319 (*priv->txqs)[i] = NULL;
2326 if (priv->pd != NULL) {
2327 assert(priv->ctx != NULL);
2328 claim_zero(ibv_dealloc_pd(priv->pd));
2329 claim_zero(ibv_close_device(priv->ctx));
2331 assert(priv->ctx == NULL);
2332 priv_dev_removal_interrupt_handler_uninstall(priv, dev);
2333 priv_dev_link_interrupt_handler_uninstall(priv, dev);
2334 priv_rx_intr_vec_disable(priv);
2336 memset(priv, 0, sizeof(*priv));
2340 * Change the link state (UP / DOWN).
2343 * Pointer to Ethernet device private data.
2345 * Nonzero for link up, otherwise link down.
2348 * 0 on success, errno value on failure.
2351 priv_set_link(struct priv *priv, int up)
2353 struct rte_eth_dev *dev = priv->dev;
2357 err = priv_set_flags(priv, ~IFF_UP, IFF_UP);
2360 dev->rx_pkt_burst = mlx4_rx_burst;
2362 err = priv_set_flags(priv, ~IFF_UP, ~IFF_UP);
2365 dev->rx_pkt_burst = removed_rx_burst;
2366 dev->tx_pkt_burst = removed_tx_burst;
2372 * DPDK callback to bring the link DOWN.
2375 * Pointer to Ethernet device structure.
2378 * 0 on success, errno value on failure.
2381 mlx4_set_link_down(struct rte_eth_dev *dev)
2383 struct priv *priv = dev->data->dev_private;
2387 err = priv_set_link(priv, 0);
2393 * DPDK callback to bring the link UP.
2396 * Pointer to Ethernet device structure.
2399 * 0 on success, errno value on failure.
2402 mlx4_set_link_up(struct rte_eth_dev *dev)
2404 struct priv *priv = dev->data->dev_private;
2408 err = priv_set_link(priv, 1);
2413 * DPDK callback to get information about the device.
2416 * Pointer to Ethernet device structure.
2418 * Info structure output buffer.
2421 mlx4_dev_infos_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *info)
2423 struct priv *priv = dev->data->dev_private;
2425 char ifname[IF_NAMESIZE];
2427 info->pci_dev = RTE_ETH_DEV_TO_PCI(dev);
2432 /* FIXME: we should ask the device for these values. */
2433 info->min_rx_bufsize = 32;
2434 info->max_rx_pktlen = 65536;
2436 * Since we need one CQ per QP, the limit is the minimum number
2437 * between the two values.
2439 max = ((priv->device_attr.max_cq > priv->device_attr.max_qp) ?
2440 priv->device_attr.max_qp : priv->device_attr.max_cq);
2441 /* If max >= 65535 then max = 0, max_rx_queues is uint16_t. */
2444 info->max_rx_queues = max;
2445 info->max_tx_queues = max;
2446 /* Last array entry is reserved for broadcast. */
2447 info->max_mac_addrs = 1;
2448 info->rx_offload_capa = 0;
2449 info->tx_offload_capa = 0;
2450 if (priv_get_ifname(priv, &ifname) == 0)
2451 info->if_index = if_nametoindex(ifname);
2454 ETH_LINK_SPEED_10G |
2455 ETH_LINK_SPEED_20G |
2456 ETH_LINK_SPEED_40G |
2462 * DPDK callback to get device statistics.
2465 * Pointer to Ethernet device structure.
2467 * Stats structure output buffer.
2470 mlx4_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
2472 struct priv *priv = dev->data->dev_private;
2473 struct rte_eth_stats tmp = {0};
2480 /* Add software counters. */
2481 for (i = 0; (i != priv->rxqs_n); ++i) {
2482 struct rxq *rxq = (*priv->rxqs)[i];
2486 idx = rxq->stats.idx;
2487 if (idx < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
2488 tmp.q_ipackets[idx] += rxq->stats.ipackets;
2489 tmp.q_ibytes[idx] += rxq->stats.ibytes;
2490 tmp.q_errors[idx] += (rxq->stats.idropped +
2491 rxq->stats.rx_nombuf);
2493 tmp.ipackets += rxq->stats.ipackets;
2494 tmp.ibytes += rxq->stats.ibytes;
2495 tmp.ierrors += rxq->stats.idropped;
2496 tmp.rx_nombuf += rxq->stats.rx_nombuf;
2498 for (i = 0; (i != priv->txqs_n); ++i) {
2499 struct txq *txq = (*priv->txqs)[i];
2503 idx = txq->stats.idx;
2504 if (idx < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
2505 tmp.q_opackets[idx] += txq->stats.opackets;
2506 tmp.q_obytes[idx] += txq->stats.obytes;
2507 tmp.q_errors[idx] += txq->stats.odropped;
2509 tmp.opackets += txq->stats.opackets;
2510 tmp.obytes += txq->stats.obytes;
2511 tmp.oerrors += txq->stats.odropped;
2518 * DPDK callback to clear device statistics.
2521 * Pointer to Ethernet device structure.
2524 mlx4_stats_reset(struct rte_eth_dev *dev)
2526 struct priv *priv = dev->data->dev_private;
2533 for (i = 0; (i != priv->rxqs_n); ++i) {
2534 if ((*priv->rxqs)[i] == NULL)
2536 idx = (*priv->rxqs)[i]->stats.idx;
2537 (*priv->rxqs)[i]->stats =
2538 (struct mlx4_rxq_stats){ .idx = idx };
2540 for (i = 0; (i != priv->txqs_n); ++i) {
2541 if ((*priv->txqs)[i] == NULL)
2543 idx = (*priv->txqs)[i]->stats.idx;
2544 (*priv->txqs)[i]->stats =
2545 (struct mlx4_txq_stats){ .idx = idx };
2551 * DPDK callback to retrieve physical link information.
2554 * Pointer to Ethernet device structure.
2555 * @param wait_to_complete
2556 * Wait for request completion (ignored).
2559 mlx4_link_update(struct rte_eth_dev *dev, int wait_to_complete)
2561 const struct priv *priv = dev->data->dev_private;
2562 struct ethtool_cmd edata = {
2566 struct rte_eth_link dev_link;
2569 /* priv_lock() is not taken to allow concurrent calls. */
2573 (void)wait_to_complete;
2574 if (priv_ifreq(priv, SIOCGIFFLAGS, &ifr)) {
2575 WARN("ioctl(SIOCGIFFLAGS) failed: %s", strerror(errno));
2578 memset(&dev_link, 0, sizeof(dev_link));
2579 dev_link.link_status = ((ifr.ifr_flags & IFF_UP) &&
2580 (ifr.ifr_flags & IFF_RUNNING));
2581 ifr.ifr_data = (void *)&edata;
2582 if (priv_ifreq(priv, SIOCETHTOOL, &ifr)) {
2583 WARN("ioctl(SIOCETHTOOL, ETHTOOL_GSET) failed: %s",
2587 link_speed = ethtool_cmd_speed(&edata);
2588 if (link_speed == -1)
2589 dev_link.link_speed = 0;
2591 dev_link.link_speed = link_speed;
2592 dev_link.link_duplex = ((edata.duplex == DUPLEX_HALF) ?
2593 ETH_LINK_HALF_DUPLEX : ETH_LINK_FULL_DUPLEX);
2594 dev_link.link_autoneg = !(dev->data->dev_conf.link_speeds &
2595 ETH_LINK_SPEED_FIXED);
2596 if (memcmp(&dev_link, &dev->data->dev_link, sizeof(dev_link))) {
2597 /* Link status changed. */
2598 dev->data->dev_link = dev_link;
2601 /* Link status is still the same. */
2606 * DPDK callback to change the MTU.
2609 * Pointer to Ethernet device structure.
2614 * 0 on success, negative errno value on failure.
2617 mlx4_dev_set_mtu(struct rte_eth_dev *dev, uint16_t mtu)
2619 struct priv *priv = dev->data->dev_private;
2623 /* Set kernel interface MTU first. */
2624 if (priv_set_mtu(priv, mtu)) {
2626 WARN("cannot set port %u MTU to %u: %s", priv->port, mtu,
2630 DEBUG("adapter port %u MTU set to %u", priv->port, mtu);
2639 * DPDK callback to get flow control status.
2642 * Pointer to Ethernet device structure.
2643 * @param[out] fc_conf
2644 * Flow control output buffer.
2647 * 0 on success, negative errno value on failure.
2650 mlx4_dev_get_flow_ctrl(struct rte_eth_dev *dev, struct rte_eth_fc_conf *fc_conf)
2652 struct priv *priv = dev->data->dev_private;
2654 struct ethtool_pauseparam ethpause = {
2655 .cmd = ETHTOOL_GPAUSEPARAM
2659 ifr.ifr_data = (void *)ðpause;
2661 if (priv_ifreq(priv, SIOCETHTOOL, &ifr)) {
2663 WARN("ioctl(SIOCETHTOOL, ETHTOOL_GPAUSEPARAM)"
2669 fc_conf->autoneg = ethpause.autoneg;
2670 if (ethpause.rx_pause && ethpause.tx_pause)
2671 fc_conf->mode = RTE_FC_FULL;
2672 else if (ethpause.rx_pause)
2673 fc_conf->mode = RTE_FC_RX_PAUSE;
2674 else if (ethpause.tx_pause)
2675 fc_conf->mode = RTE_FC_TX_PAUSE;
2677 fc_conf->mode = RTE_FC_NONE;
2687 * DPDK callback to modify flow control parameters.
2690 * Pointer to Ethernet device structure.
2691 * @param[in] fc_conf
2692 * Flow control parameters.
2695 * 0 on success, negative errno value on failure.
2698 mlx4_dev_set_flow_ctrl(struct rte_eth_dev *dev, struct rte_eth_fc_conf *fc_conf)
2700 struct priv *priv = dev->data->dev_private;
2702 struct ethtool_pauseparam ethpause = {
2703 .cmd = ETHTOOL_SPAUSEPARAM
2707 ifr.ifr_data = (void *)ðpause;
2708 ethpause.autoneg = fc_conf->autoneg;
2709 if (((fc_conf->mode & RTE_FC_FULL) == RTE_FC_FULL) ||
2710 (fc_conf->mode & RTE_FC_RX_PAUSE))
2711 ethpause.rx_pause = 1;
2713 ethpause.rx_pause = 0;
2715 if (((fc_conf->mode & RTE_FC_FULL) == RTE_FC_FULL) ||
2716 (fc_conf->mode & RTE_FC_TX_PAUSE))
2717 ethpause.tx_pause = 1;
2719 ethpause.tx_pause = 0;
2722 if (priv_ifreq(priv, SIOCETHTOOL, &ifr)) {
2724 WARN("ioctl(SIOCETHTOOL, ETHTOOL_SPAUSEPARAM)"
2737 const struct rte_flow_ops mlx4_flow_ops = {
2738 .validate = mlx4_flow_validate,
2739 .create = mlx4_flow_create,
2740 .destroy = mlx4_flow_destroy,
2741 .flush = mlx4_flow_flush,
2743 .isolate = mlx4_flow_isolate,
2747 * Manage filter operations.
2750 * Pointer to Ethernet device structure.
2751 * @param filter_type
2754 * Operation to perform.
2756 * Pointer to operation-specific structure.
2759 * 0 on success, negative errno value on failure.
2762 mlx4_dev_filter_ctrl(struct rte_eth_dev *dev,
2763 enum rte_filter_type filter_type,
2764 enum rte_filter_op filter_op,
2769 switch (filter_type) {
2770 case RTE_ETH_FILTER_GENERIC:
2771 if (filter_op != RTE_ETH_FILTER_GET)
2773 *(const void **)arg = &mlx4_flow_ops;
2776 ERROR("%p: filter type (%d) not supported",
2777 (void *)dev, filter_type);
2783 static const struct eth_dev_ops mlx4_dev_ops = {
2784 .dev_configure = mlx4_dev_configure,
2785 .dev_start = mlx4_dev_start,
2786 .dev_stop = mlx4_dev_stop,
2787 .dev_set_link_down = mlx4_set_link_down,
2788 .dev_set_link_up = mlx4_set_link_up,
2789 .dev_close = mlx4_dev_close,
2790 .link_update = mlx4_link_update,
2791 .stats_get = mlx4_stats_get,
2792 .stats_reset = mlx4_stats_reset,
2793 .dev_infos_get = mlx4_dev_infos_get,
2794 .rx_queue_setup = mlx4_rx_queue_setup,
2795 .tx_queue_setup = mlx4_tx_queue_setup,
2796 .rx_queue_release = mlx4_rx_queue_release,
2797 .tx_queue_release = mlx4_tx_queue_release,
2798 .flow_ctrl_get = mlx4_dev_get_flow_ctrl,
2799 .flow_ctrl_set = mlx4_dev_set_flow_ctrl,
2800 .mtu_set = mlx4_dev_set_mtu,
2801 .filter_ctrl = mlx4_dev_filter_ctrl,
2802 .rx_queue_intr_enable = mlx4_rx_intr_enable,
2803 .rx_queue_intr_disable = mlx4_rx_intr_disable,
2807 * Get PCI information from struct ibv_device.
2810 * Pointer to Ethernet device structure.
2811 * @param[out] pci_addr
2812 * PCI bus address output buffer.
2815 * 0 on success, -1 on failure and errno is set.
2818 mlx4_ibv_device_to_pci_addr(const struct ibv_device *device,
2819 struct rte_pci_addr *pci_addr)
2823 MKSTR(path, "%s/device/uevent", device->ibdev_path);
2825 file = fopen(path, "rb");
2828 while (fgets(line, sizeof(line), file) == line) {
2829 size_t len = strlen(line);
2832 /* Truncate long lines. */
2833 if (len == (sizeof(line) - 1))
2834 while (line[(len - 1)] != '\n') {
2838 line[(len - 1)] = ret;
2840 /* Extract information. */
2843 "%" SCNx32 ":%" SCNx8 ":%" SCNx8 ".%" SCNx8 "\n",
2847 &pci_addr->function) == 4) {
2857 * Get MAC address by querying netdevice.
2860 * struct priv for the requested device.
2862 * MAC address output buffer.
2865 * 0 on success, -1 on failure and errno is set.
2868 priv_get_mac(struct priv *priv, uint8_t (*mac)[ETHER_ADDR_LEN])
2870 struct ifreq request;
2872 if (priv_ifreq(priv, SIOCGIFHWADDR, &request))
2874 memcpy(mac, request.ifr_hwaddr.sa_data, ETHER_ADDR_LEN);
2879 mlx4_dev_link_status_handler(void *);
2881 mlx4_dev_interrupt_handler(void *);
2884 * Link/device status handler.
2887 * Pointer to private structure.
2889 * Pointer to the rte_eth_dev structure.
2891 * Pointer to event flags holder.
2897 priv_dev_status_handler(struct priv *priv, struct rte_eth_dev *dev,
2900 struct ibv_async_event event;
2901 int port_change = 0;
2902 struct rte_eth_link *link = &dev->data->dev_link;
2906 /* Read all message and acknowledge them. */
2908 if (ibv_get_async_event(priv->ctx, &event))
2910 if ((event.event_type == IBV_EVENT_PORT_ACTIVE ||
2911 event.event_type == IBV_EVENT_PORT_ERR) &&
2912 (priv->intr_conf.lsc == 1)) {
2915 } else if (event.event_type == IBV_EVENT_DEVICE_FATAL &&
2916 priv->intr_conf.rmv == 1) {
2917 *events |= (1 << RTE_ETH_EVENT_INTR_RMV);
2920 DEBUG("event type %d on port %d not handled",
2921 event.event_type, event.element.port_num);
2922 ibv_ack_async_event(&event);
2926 mlx4_link_update(dev, 0);
2927 if (((link->link_speed == 0) && link->link_status) ||
2928 ((link->link_speed != 0) && !link->link_status)) {
2929 if (!priv->pending_alarm) {
2930 /* Inconsistent status, check again later. */
2931 priv->pending_alarm = 1;
2932 rte_eal_alarm_set(MLX4_ALARM_TIMEOUT_US,
2933 mlx4_dev_link_status_handler,
2937 *events |= (1 << RTE_ETH_EVENT_INTR_LSC);
2943 * Handle delayed link status event.
2946 * Registered argument.
2949 mlx4_dev_link_status_handler(void *arg)
2951 struct rte_eth_dev *dev = arg;
2952 struct priv *priv = dev->data->dev_private;
2957 assert(priv->pending_alarm == 1);
2958 priv->pending_alarm = 0;
2959 ret = priv_dev_status_handler(priv, dev, &events);
2961 if (ret > 0 && events & (1 << RTE_ETH_EVENT_INTR_LSC))
2962 _rte_eth_dev_callback_process(dev, RTE_ETH_EVENT_INTR_LSC, NULL,
2967 * Handle interrupts from the NIC.
2969 * @param[in] intr_handle
2970 * Interrupt handler.
2972 * Callback argument.
2975 mlx4_dev_interrupt_handler(void *cb_arg)
2977 struct rte_eth_dev *dev = cb_arg;
2978 struct priv *priv = dev->data->dev_private;
2984 ret = priv_dev_status_handler(priv, dev, &ev);
2987 for (i = RTE_ETH_EVENT_UNKNOWN;
2988 i < RTE_ETH_EVENT_MAX;
2990 if (ev & (1 << i)) {
2992 _rte_eth_dev_callback_process(dev, i, NULL,
2998 WARN("%d event%s not processed", ret,
2999 (ret > 1 ? "s were" : " was"));
3004 * Uninstall interrupt handler.
3007 * Pointer to private structure.
3009 * Pointer to the rte_eth_dev structure.
3011 * 0 on success, negative errno value on failure.
3014 priv_dev_interrupt_handler_uninstall(struct priv *priv, struct rte_eth_dev *dev)
3018 if (priv->intr_conf.lsc ||
3019 priv->intr_conf.rmv)
3021 ret = rte_intr_callback_unregister(&priv->intr_handle,
3022 mlx4_dev_interrupt_handler,
3025 ERROR("rte_intr_callback_unregister failed with %d"
3027 (errno ? " (errno: " : ""),
3028 (errno ? strerror(errno) : ""),
3029 (errno ? ")" : ""));
3031 priv->intr_handle.fd = 0;
3032 priv->intr_handle.type = RTE_INTR_HANDLE_UNKNOWN;
3037 * Install interrupt handler.
3040 * Pointer to private structure.
3042 * Pointer to the rte_eth_dev structure.
3044 * 0 on success, negative errno value on failure.
3047 priv_dev_interrupt_handler_install(struct priv *priv,
3048 struct rte_eth_dev *dev)
3053 /* Check whether the interrupt handler has already been installed
3054 * for either type of interrupt
3056 if (priv->intr_conf.lsc &&
3057 priv->intr_conf.rmv &&
3058 priv->intr_handle.fd)
3060 assert(priv->ctx->async_fd > 0);
3061 flags = fcntl(priv->ctx->async_fd, F_GETFL);
3062 rc = fcntl(priv->ctx->async_fd, F_SETFL, flags | O_NONBLOCK);
3064 INFO("failed to change file descriptor async event queue");
3065 dev->data->dev_conf.intr_conf.lsc = 0;
3066 dev->data->dev_conf.intr_conf.rmv = 0;
3069 priv->intr_handle.fd = priv->ctx->async_fd;
3070 priv->intr_handle.type = RTE_INTR_HANDLE_EXT;
3071 rc = rte_intr_callback_register(&priv->intr_handle,
3072 mlx4_dev_interrupt_handler,
3075 ERROR("rte_intr_callback_register failed "
3076 " (errno: %s)", strerror(errno));
3084 * Uninstall interrupt handler.
3087 * Pointer to private structure.
3089 * Pointer to the rte_eth_dev structure.
3091 * 0 on success, negative value on error.
3094 priv_dev_removal_interrupt_handler_uninstall(struct priv *priv,
3095 struct rte_eth_dev *dev)
3097 if (dev->data->dev_conf.intr_conf.rmv) {
3098 priv->intr_conf.rmv = 0;
3099 return priv_dev_interrupt_handler_uninstall(priv, dev);
3105 * Uninstall interrupt handler.
3108 * Pointer to private structure.
3110 * Pointer to the rte_eth_dev structure.
3112 * 0 on success, negative value on error,
3115 priv_dev_link_interrupt_handler_uninstall(struct priv *priv,
3116 struct rte_eth_dev *dev)
3120 if (dev->data->dev_conf.intr_conf.lsc) {
3121 priv->intr_conf.lsc = 0;
3122 ret = priv_dev_interrupt_handler_uninstall(priv, dev);
3126 if (priv->pending_alarm)
3127 if (rte_eal_alarm_cancel(mlx4_dev_link_status_handler,
3129 ERROR("rte_eal_alarm_cancel failed "
3130 " (errno: %s)", strerror(rte_errno));
3133 priv->pending_alarm = 0;
3138 * Install link interrupt handler.
3141 * Pointer to private structure.
3143 * Pointer to the rte_eth_dev structure.
3145 * 0 on success, negative value on error.
3148 priv_dev_link_interrupt_handler_install(struct priv *priv,
3149 struct rte_eth_dev *dev)
3153 if (dev->data->dev_conf.intr_conf.lsc) {
3154 ret = priv_dev_interrupt_handler_install(priv, dev);
3157 priv->intr_conf.lsc = 1;
3163 * Install removal interrupt handler.
3166 * Pointer to private structure.
3168 * Pointer to the rte_eth_dev structure.
3170 * 0 on success, negative value on error.
3173 priv_dev_removal_interrupt_handler_install(struct priv *priv,
3174 struct rte_eth_dev *dev)
3178 if (dev->data->dev_conf.intr_conf.rmv) {
3179 ret = priv_dev_interrupt_handler_install(priv, dev);
3182 priv->intr_conf.rmv = 1;
3188 * Allocate queue vector and fill epoll fd list for Rx interrupts.
3191 * Pointer to private structure.
3194 * 0 on success, negative on failure.
3197 priv_rx_intr_vec_enable(struct priv *priv)
3200 unsigned int rxqs_n = priv->rxqs_n;
3201 unsigned int n = RTE_MIN(rxqs_n, (uint32_t)RTE_MAX_RXTX_INTR_VEC_ID);
3202 unsigned int count = 0;
3203 struct rte_intr_handle *intr_handle = priv->dev->intr_handle;
3205 if (!priv->dev->data->dev_conf.intr_conf.rxq)
3207 priv_rx_intr_vec_disable(priv);
3208 intr_handle->intr_vec = malloc(sizeof(intr_handle->intr_vec[rxqs_n]));
3209 if (intr_handle->intr_vec == NULL) {
3210 ERROR("failed to allocate memory for interrupt vector,"
3211 " Rx interrupts will not be supported");
3214 intr_handle->type = RTE_INTR_HANDLE_EXT;
3215 for (i = 0; i != n; ++i) {
3216 struct rxq *rxq = (*priv->rxqs)[i];
3221 /* Skip queues that cannot request interrupts. */
3222 if (!rxq || !rxq->channel) {
3223 /* Use invalid intr_vec[] index to disable entry. */
3224 intr_handle->intr_vec[i] =
3225 RTE_INTR_VEC_RXTX_OFFSET +
3226 RTE_MAX_RXTX_INTR_VEC_ID;
3229 if (count >= RTE_MAX_RXTX_INTR_VEC_ID) {
3230 ERROR("too many Rx queues for interrupt vector size"
3231 " (%d), Rx interrupts cannot be enabled",
3232 RTE_MAX_RXTX_INTR_VEC_ID);
3233 priv_rx_intr_vec_disable(priv);
3236 fd = rxq->channel->fd;
3237 flags = fcntl(fd, F_GETFL);
3238 rc = fcntl(fd, F_SETFL, flags | O_NONBLOCK);
3240 ERROR("failed to make Rx interrupt file descriptor"
3241 " %d non-blocking for queue index %d", fd, i);
3242 priv_rx_intr_vec_disable(priv);
3245 intr_handle->intr_vec[i] = RTE_INTR_VEC_RXTX_OFFSET + count;
3246 intr_handle->efds[count] = fd;
3250 priv_rx_intr_vec_disable(priv);
3252 intr_handle->nb_efd = count;
3257 * Clean up Rx interrupts handler.
3260 * Pointer to private structure.
3263 priv_rx_intr_vec_disable(struct priv *priv)
3265 struct rte_intr_handle *intr_handle = priv->dev->intr_handle;
3267 rte_intr_free_epoll_fd(intr_handle);
3268 free(intr_handle->intr_vec);
3269 intr_handle->nb_efd = 0;
3270 intr_handle->intr_vec = NULL;
3274 * DPDK callback for Rx queue interrupt enable.
3277 * Pointer to Ethernet device structure.
3282 * 0 on success, negative on failure.
3285 mlx4_rx_intr_enable(struct rte_eth_dev *dev, uint16_t idx)
3287 struct priv *priv = dev->data->dev_private;
3288 struct rxq *rxq = (*priv->rxqs)[idx];
3291 if (!rxq || !rxq->channel)
3294 ret = ibv_req_notify_cq(rxq->cq, 0);
3296 WARN("unable to arm interrupt on rx queue %d", idx);
3301 * DPDK callback for Rx queue interrupt disable.
3304 * Pointer to Ethernet device structure.
3309 * 0 on success, negative on failure.
3312 mlx4_rx_intr_disable(struct rte_eth_dev *dev, uint16_t idx)
3314 struct priv *priv = dev->data->dev_private;
3315 struct rxq *rxq = (*priv->rxqs)[idx];
3316 struct ibv_cq *ev_cq;
3320 if (!rxq || !rxq->channel) {
3323 ret = ibv_get_cq_event(rxq->cq->channel, &ev_cq, &ev_ctx);
3324 if (ret || ev_cq != rxq->cq)
3328 WARN("unable to disable interrupt on rx queue %d",
3331 ibv_ack_cq_events(rxq->cq, 1);
3336 * Verify and store value for device argument.
3339 * Key argument to verify.
3341 * Value associated with key.
3342 * @param[in, out] conf
3343 * Shared configuration data.
3346 * 0 on success, negative errno value on failure.
3349 mlx4_arg_parse(const char *key, const char *val, struct mlx4_conf *conf)
3354 tmp = strtoul(val, NULL, 0);
3356 WARN("%s: \"%s\" is not a valid integer", key, val);
3359 if (strcmp(MLX4_PMD_PORT_KVARG, key) == 0) {
3360 uint32_t ports = rte_log2_u32(conf->ports.present);
3363 ERROR("port index %lu outside range [0,%" PRIu32 ")",
3367 if (!(conf->ports.present & (1 << tmp))) {
3368 ERROR("invalid port index %lu", tmp);
3371 conf->ports.enabled |= 1 << tmp;
3373 WARN("%s: unknown parameter", key);
3380 * Parse device parameters.
3383 * Device arguments structure.
3386 * 0 on success, negative errno value on failure.
3389 mlx4_args(struct rte_devargs *devargs, struct mlx4_conf *conf)
3391 struct rte_kvargs *kvlist;
3392 unsigned int arg_count;
3396 if (devargs == NULL)
3398 kvlist = rte_kvargs_parse(devargs->args, pmd_mlx4_init_params);
3399 if (kvlist == NULL) {
3400 ERROR("failed to parse kvargs");
3403 /* Process parameters. */
3404 for (i = 0; pmd_mlx4_init_params[i]; ++i) {
3405 arg_count = rte_kvargs_count(kvlist, MLX4_PMD_PORT_KVARG);
3406 while (arg_count-- > 0) {
3407 ret = rte_kvargs_process(kvlist,
3408 MLX4_PMD_PORT_KVARG,
3409 (int (*)(const char *,
3419 rte_kvargs_free(kvlist);
3423 static struct rte_pci_driver mlx4_driver;
3426 * DPDK callback to register a PCI device.
3428 * This function creates an Ethernet device for each port of a given
3431 * @param[in] pci_drv
3432 * PCI driver structure (mlx4_driver).
3433 * @param[in] pci_dev
3434 * PCI device information.
3437 * 0 on success, negative errno value on failure.
3440 mlx4_pci_probe(struct rte_pci_driver *pci_drv, struct rte_pci_device *pci_dev)
3442 struct ibv_device **list;
3443 struct ibv_device *ibv_dev;
3445 struct ibv_context *attr_ctx = NULL;
3446 struct ibv_device_attr device_attr;
3447 struct mlx4_conf conf = {
3454 assert(pci_drv == &mlx4_driver);
3456 list = ibv_get_device_list(&i);
3459 if (errno == ENOSYS)
3460 ERROR("cannot list devices, is ib_uverbs loaded?");
3465 * For each listed device, check related sysfs entry against
3466 * the provided PCI ID.
3469 struct rte_pci_addr pci_addr;
3472 DEBUG("checking device \"%s\"", list[i]->name);
3473 if (mlx4_ibv_device_to_pci_addr(list[i], &pci_addr))
3475 if ((pci_dev->addr.domain != pci_addr.domain) ||
3476 (pci_dev->addr.bus != pci_addr.bus) ||
3477 (pci_dev->addr.devid != pci_addr.devid) ||
3478 (pci_dev->addr.function != pci_addr.function))
3480 vf = (pci_dev->id.device_id ==
3481 PCI_DEVICE_ID_MELLANOX_CONNECTX3VF);
3482 INFO("PCI information matches, using device \"%s\" (VF: %s)",
3483 list[i]->name, (vf ? "true" : "false"));
3484 attr_ctx = ibv_open_device(list[i]);
3488 if (attr_ctx == NULL) {
3489 ibv_free_device_list(list);
3492 ERROR("cannot access device, is mlx4_ib loaded?");
3495 ERROR("cannot use device, are drivers up to date?");
3503 DEBUG("device opened");
3504 if (ibv_query_device(attr_ctx, &device_attr)) {
3508 INFO("%u port(s) detected", device_attr.phys_port_cnt);
3510 conf.ports.present |= (UINT64_C(1) << device_attr.phys_port_cnt) - 1;
3511 if (mlx4_args(pci_dev->device.devargs, &conf)) {
3512 ERROR("failed to process device arguments");
3516 /* Use all ports when none are defined */
3517 if (!conf.ports.enabled)
3518 conf.ports.enabled = conf.ports.present;
3519 for (i = 0; i < device_attr.phys_port_cnt; i++) {
3520 uint32_t port = i + 1; /* ports are indexed from one */
3521 struct ibv_context *ctx = NULL;
3522 struct ibv_port_attr port_attr;
3523 struct ibv_pd *pd = NULL;
3524 struct priv *priv = NULL;
3525 struct rte_eth_dev *eth_dev = NULL;
3526 struct ether_addr mac;
3528 /* If port is not enabled, skip. */
3529 if (!(conf.ports.enabled & (1 << i)))
3532 DEBUG("using port %u", port);
3534 ctx = ibv_open_device(ibv_dev);
3540 /* Check port status. */
3541 err = ibv_query_port(ctx, port, &port_attr);
3543 ERROR("port query failed: %s", strerror(err));
3548 if (port_attr.link_layer != IBV_LINK_LAYER_ETHERNET) {
3549 ERROR("port %d is not configured in Ethernet mode",
3555 if (port_attr.state != IBV_PORT_ACTIVE)
3556 DEBUG("port %d is not active: \"%s\" (%d)",
3557 port, ibv_port_state_str(port_attr.state),
3560 /* Allocate protection domain. */
3561 pd = ibv_alloc_pd(ctx);
3563 ERROR("PD allocation failure");
3568 /* from rte_ethdev.c */
3569 priv = rte_zmalloc("ethdev private structure",
3571 RTE_CACHE_LINE_SIZE);
3573 ERROR("priv allocation failure");
3579 priv->device_attr = device_attr;
3582 priv->mtu = ETHER_MTU;
3585 /* Configure the first MAC address by default. */
3586 if (priv_get_mac(priv, &mac.addr_bytes)) {
3587 ERROR("cannot get MAC address, is mlx4_en loaded?"
3588 " (errno: %s)", strerror(errno));
3592 INFO("port %u MAC address is %02x:%02x:%02x:%02x:%02x:%02x",
3594 mac.addr_bytes[0], mac.addr_bytes[1],
3595 mac.addr_bytes[2], mac.addr_bytes[3],
3596 mac.addr_bytes[4], mac.addr_bytes[5]);
3597 /* Register MAC address. */
3599 if (priv_mac_addr_add(priv))
3603 char ifname[IF_NAMESIZE];
3605 if (priv_get_ifname(priv, &ifname) == 0)
3606 DEBUG("port %u ifname is \"%s\"",
3607 priv->port, ifname);
3609 DEBUG("port %u ifname is unknown", priv->port);
3612 /* Get actual MTU if possible. */
3613 priv_get_mtu(priv, &priv->mtu);
3614 DEBUG("port %u MTU is %u", priv->port, priv->mtu);
3616 /* from rte_ethdev.c */
3618 char name[RTE_ETH_NAME_MAX_LEN];
3620 snprintf(name, sizeof(name), "%s port %u",
3621 ibv_get_device_name(ibv_dev), port);
3622 eth_dev = rte_eth_dev_allocate(name);
3624 if (eth_dev == NULL) {
3625 ERROR("can not allocate rte ethdev");
3630 eth_dev->data->dev_private = priv;
3631 eth_dev->data->mac_addrs = &priv->mac;
3632 eth_dev->device = &pci_dev->device;
3634 rte_eth_copy_pci_info(eth_dev, pci_dev);
3636 eth_dev->device->driver = &mlx4_driver.driver;
3639 * Copy and override interrupt handle to prevent it from
3640 * being shared between all ethdev instances of a given PCI
3641 * device. This is required to properly handle Rx interrupts
3644 priv->intr_handle_dev = *eth_dev->intr_handle;
3645 eth_dev->intr_handle = &priv->intr_handle_dev;
3647 priv->dev = eth_dev;
3648 eth_dev->dev_ops = &mlx4_dev_ops;
3649 eth_dev->data->dev_flags |= RTE_ETH_DEV_DETACHABLE;
3651 /* Bring Ethernet device up. */
3652 DEBUG("forcing Ethernet interface up");
3653 priv_set_flags(priv, ~IFF_UP, IFF_UP);
3654 /* Update link status once if waiting for LSC. */
3655 if (eth_dev->data->dev_flags & RTE_ETH_DEV_INTR_LSC)
3656 mlx4_link_update(eth_dev, 0);
3662 claim_zero(ibv_dealloc_pd(pd));
3664 claim_zero(ibv_close_device(ctx));
3666 rte_eth_dev_release_port(eth_dev);
3669 if (i == device_attr.phys_port_cnt)
3673 * XXX if something went wrong in the loop above, there is a resource
3674 * leak (ctx, pd, priv, dpdk ethdev) but we can do nothing about it as
3675 * long as the dpdk does not provide a way to deallocate a ethdev and a
3676 * way to enumerate the registered ethdevs to free the previous ones.
3681 claim_zero(ibv_close_device(attr_ctx));
3683 ibv_free_device_list(list);
3688 static const struct rte_pci_id mlx4_pci_id_map[] = {
3690 RTE_PCI_DEVICE(PCI_VENDOR_ID_MELLANOX,
3691 PCI_DEVICE_ID_MELLANOX_CONNECTX3)
3694 RTE_PCI_DEVICE(PCI_VENDOR_ID_MELLANOX,
3695 PCI_DEVICE_ID_MELLANOX_CONNECTX3PRO)
3698 RTE_PCI_DEVICE(PCI_VENDOR_ID_MELLANOX,
3699 PCI_DEVICE_ID_MELLANOX_CONNECTX3VF)
3706 static struct rte_pci_driver mlx4_driver = {
3708 .name = MLX4_DRIVER_NAME
3710 .id_table = mlx4_pci_id_map,
3711 .probe = mlx4_pci_probe,
3712 .drv_flags = RTE_PCI_DRV_INTR_LSC |
3713 RTE_PCI_DRV_INTR_RMV,
3717 * Driver initialization routine.
3719 RTE_INIT(rte_mlx4_pmd_init);
3721 rte_mlx4_pmd_init(void)
3723 RTE_BUILD_BUG_ON(sizeof(wr_id_t) != sizeof(uint64_t));
3725 * RDMAV_HUGEPAGES_SAFE tells ibv_fork_init() we intend to use
3726 * huge pages. Calling ibv_fork_init() during init allows
3727 * applications to use fork() safely for purposes other than
3728 * using this PMD, which is not supported in forked processes.
3730 setenv("RDMAV_HUGEPAGES_SAFE", "1", 1);
3732 rte_pci_register(&mlx4_driver);
3735 RTE_PMD_EXPORT_NAME(net_mlx4, __COUNTER__);
3736 RTE_PMD_REGISTER_PCI_TABLE(net_mlx4, mlx4_pci_id_map);
3737 RTE_PMD_REGISTER_KMOD_DEP(net_mlx4,
3738 "* ib_uverbs & mlx4_en & mlx4_core & mlx4_ib");