4 * Copyright 2015 6WIND S.A.
5 * Copyright 2015 Mellanox.
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8 * modification, are permitted provided that the following conditions
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15 * the documentation and/or other materials provided with the
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44 #include <sys/ioctl.h>
45 #include <sys/socket.h>
46 #include <netinet/in.h>
48 #include <linux/ethtool.h>
49 #include <linux/sockios.h>
52 /* DPDK headers don't like -pedantic. */
54 #pragma GCC diagnostic ignored "-pedantic"
56 #include <rte_atomic.h>
57 #include <rte_ethdev.h>
59 #include <rte_common.h>
60 #include <rte_interrupts.h>
61 #include <rte_alarm.h>
62 #include <rte_malloc.h>
64 #pragma GCC diagnostic error "-pedantic"
68 #include "mlx5_rxtx.h"
69 #include "mlx5_utils.h"
72 * Return private structure associated with an Ethernet device.
75 * Pointer to Ethernet device structure.
78 * Pointer to private structure.
81 mlx5_get_priv(struct rte_eth_dev *dev)
83 struct mlx5_secondary_data *sd;
85 if (!mlx5_is_secondary())
86 return dev->data->dev_private;
87 sd = &mlx5_secondary_data[dev->data->port_id];
88 return sd->data.dev_private;
92 * Check if running as a secondary process.
95 * Nonzero if running as a secondary process.
98 mlx5_is_secondary(void)
100 return rte_eal_process_type() != RTE_PROC_PRIMARY;
104 * Get interface name from private structure.
107 * Pointer to private structure.
109 * Interface name output buffer.
112 * 0 on success, -1 on failure and errno is set.
115 priv_get_ifname(const struct priv *priv, char (*ifname)[IF_NAMESIZE])
119 unsigned int dev_type = 0;
120 unsigned int dev_port_prev = ~0u;
121 char match[IF_NAMESIZE] = "";
124 MKSTR(path, "%s/device/net", priv->ctx->device->ibdev_path);
130 while ((dent = readdir(dir)) != NULL) {
131 char *name = dent->d_name;
133 unsigned int dev_port;
136 if ((name[0] == '.') &&
137 ((name[1] == '\0') ||
138 ((name[1] == '.') && (name[2] == '\0'))))
141 MKSTR(path, "%s/device/net/%s/%s",
142 priv->ctx->device->ibdev_path, name,
143 (dev_type ? "dev_id" : "dev_port"));
145 file = fopen(path, "rb");
150 * Switch to dev_id when dev_port does not exist as
151 * is the case with Linux kernel versions < 3.15.
162 r = fscanf(file, (dev_type ? "%x" : "%u"), &dev_port);
167 * Switch to dev_id when dev_port returns the same value for
168 * all ports. May happen when using a MOFED release older than
169 * 3.0 with a Linux kernel >= 3.15.
171 if (dev_port == dev_port_prev)
173 dev_port_prev = dev_port;
174 if (dev_port == (priv->port - 1u))
175 snprintf(match, sizeof(match), "%s", name);
178 if (match[0] == '\0')
180 strncpy(*ifname, match, sizeof(*ifname));
185 * Read from sysfs entry.
188 * Pointer to private structure.
190 * Entry name relative to sysfs path.
192 * Data output buffer.
197 * 0 on success, -1 on failure and errno is set.
200 priv_sysfs_read(const struct priv *priv, const char *entry,
201 char *buf, size_t size)
203 char ifname[IF_NAMESIZE];
208 if (priv_get_ifname(priv, &ifname))
211 MKSTR(path, "%s/device/net/%s/%s", priv->ctx->device->ibdev_path,
214 file = fopen(path, "rb");
217 ret = fread(buf, 1, size, file);
219 if (((size_t)ret < size) && (ferror(file)))
229 * Write to sysfs entry.
232 * Pointer to private structure.
234 * Entry name relative to sysfs path.
241 * 0 on success, -1 on failure and errno is set.
244 priv_sysfs_write(const struct priv *priv, const char *entry,
245 char *buf, size_t size)
247 char ifname[IF_NAMESIZE];
252 if (priv_get_ifname(priv, &ifname))
255 MKSTR(path, "%s/device/net/%s/%s", priv->ctx->device->ibdev_path,
258 file = fopen(path, "wb");
261 ret = fwrite(buf, 1, size, file);
263 if (((size_t)ret < size) || (ferror(file)))
273 * Get unsigned long sysfs property.
276 * Pointer to private structure.
278 * Entry name relative to sysfs path.
280 * Value output buffer.
283 * 0 on success, -1 on failure and errno is set.
286 priv_get_sysfs_ulong(struct priv *priv, const char *name, unsigned long *value)
289 unsigned long value_ret;
292 ret = priv_sysfs_read(priv, name, value_str, (sizeof(value_str) - 1));
294 DEBUG("cannot read %s value from sysfs: %s",
295 name, strerror(errno));
298 value_str[ret] = '\0';
300 value_ret = strtoul(value_str, NULL, 0);
302 DEBUG("invalid %s value `%s': %s", name, value_str,
311 * Set unsigned long sysfs property.
314 * Pointer to private structure.
316 * Entry name relative to sysfs path.
321 * 0 on success, -1 on failure and errno is set.
324 priv_set_sysfs_ulong(struct priv *priv, const char *name, unsigned long value)
327 MKSTR(value_str, "%lu", value);
329 ret = priv_sysfs_write(priv, name, value_str, (sizeof(value_str) - 1));
331 DEBUG("cannot write %s `%s' (%lu) to sysfs: %s",
332 name, value_str, value, strerror(errno));
339 * Perform ifreq ioctl() on associated Ethernet device.
342 * Pointer to private structure.
344 * Request number to pass to ioctl().
346 * Interface request structure output buffer.
349 * 0 on success, -1 on failure and errno is set.
352 priv_ifreq(const struct priv *priv, int req, struct ifreq *ifr)
354 int sock = socket(PF_INET, SOCK_DGRAM, IPPROTO_IP);
359 if (priv_get_ifname(priv, &ifr->ifr_name) == 0)
360 ret = ioctl(sock, req, ifr);
369 * Pointer to private structure.
371 * MTU value output buffer.
374 * 0 on success, -1 on failure and errno is set.
377 priv_get_mtu(struct priv *priv, uint16_t *mtu)
379 unsigned long ulong_mtu;
381 if (priv_get_sysfs_ulong(priv, "mtu", &ulong_mtu) == -1)
391 * Pointer to private structure.
396 * 0 on success, -1 on failure and errno is set.
399 priv_set_mtu(struct priv *priv, uint16_t mtu)
401 return priv_set_sysfs_ulong(priv, "mtu", mtu);
408 * Pointer to private structure.
410 * Bitmask for flags that must remain untouched.
412 * Bitmask for flags to modify.
415 * 0 on success, -1 on failure and errno is set.
418 priv_set_flags(struct priv *priv, unsigned int keep, unsigned int flags)
422 if (priv_get_sysfs_ulong(priv, "flags", &tmp) == -1)
426 return priv_set_sysfs_ulong(priv, "flags", tmp);
430 * Ethernet device configuration.
432 * Prepare the driver for a given number of TX and RX queues.
435 * Pointer to Ethernet device structure.
438 * 0 on success, errno value on failure.
441 dev_configure(struct rte_eth_dev *dev)
443 struct priv *priv = dev->data->dev_private;
444 unsigned int rxqs_n = dev->data->nb_rx_queues;
445 unsigned int txqs_n = dev->data->nb_tx_queues;
448 unsigned int reta_idx_n;
450 priv->rss_hf = dev->data->dev_conf.rx_adv_conf.rss_conf.rss_hf;
451 priv->rxqs = (void *)dev->data->rx_queues;
452 priv->txqs = (void *)dev->data->tx_queues;
453 if (txqs_n != priv->txqs_n) {
454 INFO("%p: TX queues number update: %u -> %u",
455 (void *)dev, priv->txqs_n, txqs_n);
456 priv->txqs_n = txqs_n;
458 if (rxqs_n > priv->ind_table_max_size) {
459 ERROR("cannot handle this many RX queues (%u)", rxqs_n);
462 if (rxqs_n == priv->rxqs_n)
464 INFO("%p: RX queues number update: %u -> %u",
465 (void *)dev, priv->rxqs_n, rxqs_n);
466 priv->rxqs_n = rxqs_n;
467 /* If the requested number of RX queues is not a power of two, use the
468 * maximum indirection table size for better balancing.
469 * The result is always rounded to the next power of two. */
470 reta_idx_n = (1 << log2above((rxqs_n & (rxqs_n - 1)) ?
471 priv->ind_table_max_size :
473 if (priv_rss_reta_index_resize(priv, reta_idx_n))
475 /* When the number of RX queues is not a power of two, the remaining
476 * table entries are padded with reused WQs and hashes are not spread
478 for (i = 0, j = 0; (i != reta_idx_n); ++i) {
479 (*priv->reta_idx)[i] = j;
487 * DPDK callback for Ethernet device configuration.
490 * Pointer to Ethernet device structure.
493 * 0 on success, negative errno value on failure.
496 mlx5_dev_configure(struct rte_eth_dev *dev)
498 struct priv *priv = dev->data->dev_private;
501 if (mlx5_is_secondary())
502 return -E_RTE_SECONDARY;
505 ret = dev_configure(dev);
512 * DPDK callback to get information about the device.
515 * Pointer to Ethernet device structure.
517 * Info structure output buffer.
520 mlx5_dev_infos_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *info)
522 struct priv *priv = mlx5_get_priv(dev);
524 char ifname[IF_NAMESIZE];
527 /* FIXME: we should ask the device for these values. */
528 info->min_rx_bufsize = 32;
529 info->max_rx_pktlen = 65536;
531 * Since we need one CQ per QP, the limit is the minimum number
532 * between the two values.
534 max = ((priv->device_attr.max_cq > priv->device_attr.max_qp) ?
535 priv->device_attr.max_qp : priv->device_attr.max_cq);
536 /* If max >= 65535 then max = 0, max_rx_queues is uint16_t. */
539 info->max_rx_queues = max;
540 info->max_tx_queues = max;
541 info->max_mac_addrs = RTE_DIM(priv->mac);
542 info->rx_offload_capa =
544 (DEV_RX_OFFLOAD_IPV4_CKSUM |
545 DEV_RX_OFFLOAD_UDP_CKSUM |
546 DEV_RX_OFFLOAD_TCP_CKSUM) :
548 info->tx_offload_capa = DEV_TX_OFFLOAD_VLAN_INSERT;
550 info->tx_offload_capa |=
551 (DEV_TX_OFFLOAD_IPV4_CKSUM |
552 DEV_TX_OFFLOAD_UDP_CKSUM |
553 DEV_TX_OFFLOAD_TCP_CKSUM);
554 if (priv_get_ifname(priv, &ifname) == 0)
555 info->if_index = if_nametoindex(ifname);
556 /* FIXME: RETA update/query API expects the callee to know the size of
557 * the indirection table, for this PMD the size varies depending on
558 * the number of RX queues, it becomes impossible to find the correct
559 * size if it is not fixed.
560 * The API should be updated to solve this problem. */
561 info->reta_size = priv->ind_table_max_size;
574 mlx5_dev_supported_ptypes_get(struct rte_eth_dev *dev)
576 static const uint32_t ptypes[] = {
577 /* refers to rxq_cq_to_pkt_type() */
580 RTE_PTYPE_INNER_L3_IPV4,
581 RTE_PTYPE_INNER_L3_IPV6,
586 if (dev->rx_pkt_burst == mlx5_rx_burst ||
587 dev->rx_pkt_burst == mlx5_rx_burst_sp)
593 * DPDK callback to retrieve physical link information (unlocked version).
596 * Pointer to Ethernet device structure.
597 * @param wait_to_complete
598 * Wait for request completion (ignored).
601 mlx5_link_update_unlocked(struct rte_eth_dev *dev, int wait_to_complete)
603 struct priv *priv = mlx5_get_priv(dev);
604 struct ethtool_cmd edata = {
608 struct rte_eth_link dev_link;
611 (void)wait_to_complete;
612 if (priv_ifreq(priv, SIOCGIFFLAGS, &ifr)) {
613 WARN("ioctl(SIOCGIFFLAGS) failed: %s", strerror(errno));
616 memset(&dev_link, 0, sizeof(dev_link));
617 dev_link.link_status = ((ifr.ifr_flags & IFF_UP) &&
618 (ifr.ifr_flags & IFF_RUNNING));
619 ifr.ifr_data = &edata;
620 if (priv_ifreq(priv, SIOCETHTOOL, &ifr)) {
621 WARN("ioctl(SIOCETHTOOL, ETHTOOL_GSET) failed: %s",
625 link_speed = ethtool_cmd_speed(&edata);
626 if (link_speed == -1)
627 dev_link.link_speed = 0;
629 dev_link.link_speed = link_speed;
630 dev_link.link_duplex = ((edata.duplex == DUPLEX_HALF) ?
631 ETH_LINK_HALF_DUPLEX : ETH_LINK_FULL_DUPLEX);
632 if (memcmp(&dev_link, &dev->data->dev_link, sizeof(dev_link))) {
633 /* Link status changed. */
634 dev->data->dev_link = dev_link;
637 /* Link status is still the same. */
642 * DPDK callback to retrieve physical link information.
645 * Pointer to Ethernet device structure.
646 * @param wait_to_complete
647 * Wait for request completion (ignored).
650 mlx5_link_update(struct rte_eth_dev *dev, int wait_to_complete)
652 struct priv *priv = mlx5_get_priv(dev);
656 ret = mlx5_link_update_unlocked(dev, wait_to_complete);
662 * DPDK callback to change the MTU.
664 * Setting the MTU affects hardware MRU (packets larger than the MTU cannot be
665 * received). Use this as a hint to enable/disable scattered packets support
666 * and improve performance when not needed.
667 * Since failure is not an option, reconfiguring queues on the fly is not
671 * Pointer to Ethernet device structure.
676 * 0 on success, negative errno value on failure.
679 mlx5_dev_set_mtu(struct rte_eth_dev *dev, uint16_t mtu)
681 struct priv *priv = dev->data->dev_private;
684 uint16_t (*rx_func)(void *, struct rte_mbuf **, uint16_t) =
687 if (mlx5_is_secondary())
688 return -E_RTE_SECONDARY;
691 /* Set kernel interface MTU first. */
692 if (priv_set_mtu(priv, mtu)) {
694 WARN("cannot set port %u MTU to %u: %s", priv->port, mtu,
698 DEBUG("adapter port %u MTU set to %u", priv->port, mtu);
700 /* Temporarily replace RX handler with a fake one, assuming it has not
701 * been copied elsewhere. */
702 dev->rx_pkt_burst = removed_rx_burst;
703 /* Make sure everyone has left mlx5_rx_burst() and uses
704 * removed_rx_burst() instead. */
707 /* Reconfigure each RX queue. */
708 for (i = 0; (i != priv->rxqs_n); ++i) {
709 struct rxq *rxq = (*priv->rxqs)[i];
710 unsigned int max_frame_len;
715 /* Calculate new maximum frame length according to MTU and
716 * toggle scattered support (sp) if necessary. */
717 max_frame_len = (priv->mtu + ETHER_HDR_LEN +
718 (ETHER_MAX_VLAN_FRAME_LEN - ETHER_MAX_LEN));
719 sp = (max_frame_len > (rxq->mb_len - RTE_PKTMBUF_HEADROOM));
720 /* Provide new values to rxq_setup(). */
721 dev->data->dev_conf.rxmode.jumbo_frame = sp;
722 dev->data->dev_conf.rxmode.max_rx_pkt_len = max_frame_len;
723 ret = rxq_rehash(dev, rxq);
725 /* Force SP RX if that queue requires it and abort. */
727 rx_func = mlx5_rx_burst_sp;
730 /* Scattered burst function takes priority. */
732 rx_func = mlx5_rx_burst_sp;
734 /* Burst functions can now be called again. */
736 dev->rx_pkt_burst = rx_func;
744 * DPDK callback to get flow control status.
747 * Pointer to Ethernet device structure.
748 * @param[out] fc_conf
749 * Flow control output buffer.
752 * 0 on success, negative errno value on failure.
755 mlx5_dev_get_flow_ctrl(struct rte_eth_dev *dev, struct rte_eth_fc_conf *fc_conf)
757 struct priv *priv = dev->data->dev_private;
759 struct ethtool_pauseparam ethpause = {
760 .cmd = ETHTOOL_GPAUSEPARAM
764 if (mlx5_is_secondary())
765 return -E_RTE_SECONDARY;
767 ifr.ifr_data = ðpause;
769 if (priv_ifreq(priv, SIOCETHTOOL, &ifr)) {
771 WARN("ioctl(SIOCETHTOOL, ETHTOOL_GPAUSEPARAM)"
777 fc_conf->autoneg = ethpause.autoneg;
778 if (ethpause.rx_pause && ethpause.tx_pause)
779 fc_conf->mode = RTE_FC_FULL;
780 else if (ethpause.rx_pause)
781 fc_conf->mode = RTE_FC_RX_PAUSE;
782 else if (ethpause.tx_pause)
783 fc_conf->mode = RTE_FC_TX_PAUSE;
785 fc_conf->mode = RTE_FC_NONE;
795 * DPDK callback to modify flow control parameters.
798 * Pointer to Ethernet device structure.
800 * Flow control parameters.
803 * 0 on success, negative errno value on failure.
806 mlx5_dev_set_flow_ctrl(struct rte_eth_dev *dev, struct rte_eth_fc_conf *fc_conf)
808 struct priv *priv = dev->data->dev_private;
810 struct ethtool_pauseparam ethpause = {
811 .cmd = ETHTOOL_SPAUSEPARAM
815 if (mlx5_is_secondary())
816 return -E_RTE_SECONDARY;
818 ifr.ifr_data = ðpause;
819 ethpause.autoneg = fc_conf->autoneg;
820 if (((fc_conf->mode & RTE_FC_FULL) == RTE_FC_FULL) ||
821 (fc_conf->mode & RTE_FC_RX_PAUSE))
822 ethpause.rx_pause = 1;
824 ethpause.rx_pause = 0;
826 if (((fc_conf->mode & RTE_FC_FULL) == RTE_FC_FULL) ||
827 (fc_conf->mode & RTE_FC_TX_PAUSE))
828 ethpause.tx_pause = 1;
830 ethpause.tx_pause = 0;
833 if (priv_ifreq(priv, SIOCETHTOOL, &ifr)) {
835 WARN("ioctl(SIOCETHTOOL, ETHTOOL_SPAUSEPARAM)"
849 * Get PCI information from struct ibv_device.
852 * Pointer to Ethernet device structure.
853 * @param[out] pci_addr
854 * PCI bus address output buffer.
857 * 0 on success, -1 on failure and errno is set.
860 mlx5_ibv_device_to_pci_addr(const struct ibv_device *device,
861 struct rte_pci_addr *pci_addr)
865 MKSTR(path, "%s/device/uevent", device->ibdev_path);
867 file = fopen(path, "rb");
870 while (fgets(line, sizeof(line), file) == line) {
871 size_t len = strlen(line);
874 /* Truncate long lines. */
875 if (len == (sizeof(line) - 1))
876 while (line[(len - 1)] != '\n') {
880 line[(len - 1)] = ret;
882 /* Extract information. */
885 "%" SCNx16 ":%" SCNx8 ":%" SCNx8 ".%" SCNx8 "\n",
889 &pci_addr->function) == 4) {
899 * Link status handler.
902 * Pointer to private structure.
904 * Pointer to the rte_eth_dev structure.
907 * Nonzero if the callback process can be called immediately.
910 priv_dev_link_status_handler(struct priv *priv, struct rte_eth_dev *dev)
912 struct ibv_async_event event;
916 /* Read all message and acknowledge them. */
918 if (ibv_get_async_event(priv->ctx, &event))
921 if (event.event_type == IBV_EVENT_PORT_ACTIVE ||
922 event.event_type == IBV_EVENT_PORT_ERR)
925 DEBUG("event type %d on port %d not handled",
926 event.event_type, event.element.port_num);
927 ibv_ack_async_event(&event);
930 if (port_change ^ priv->pending_alarm) {
931 struct rte_eth_link *link = &dev->data->dev_link;
933 priv->pending_alarm = 0;
934 mlx5_link_update_unlocked(dev, 0);
935 if (((link->link_speed == 0) && link->link_status) ||
936 ((link->link_speed != 0) && !link->link_status)) {
937 /* Inconsistent status, check again later. */
938 priv->pending_alarm = 1;
939 rte_eal_alarm_set(MLX5_ALARM_TIMEOUT_US,
940 mlx5_dev_link_status_handler,
949 * Handle delayed link status event.
952 * Registered argument.
955 mlx5_dev_link_status_handler(void *arg)
957 struct rte_eth_dev *dev = arg;
958 struct priv *priv = dev->data->dev_private;
962 assert(priv->pending_alarm == 1);
963 ret = priv_dev_link_status_handler(priv, dev);
966 _rte_eth_dev_callback_process(dev, RTE_ETH_EVENT_INTR_LSC);
970 * Handle interrupts from the NIC.
972 * @param[in] intr_handle
978 mlx5_dev_interrupt_handler(struct rte_intr_handle *intr_handle, void *cb_arg)
980 struct rte_eth_dev *dev = cb_arg;
981 struct priv *priv = dev->data->dev_private;
986 ret = priv_dev_link_status_handler(priv, dev);
989 _rte_eth_dev_callback_process(dev, RTE_ETH_EVENT_INTR_LSC);
993 * Uninstall interrupt handler.
996 * Pointer to private structure.
998 * Pointer to the rte_eth_dev structure.
1001 priv_dev_interrupt_handler_uninstall(struct priv *priv, struct rte_eth_dev *dev)
1003 if (!dev->data->dev_conf.intr_conf.lsc)
1005 rte_intr_callback_unregister(&priv->intr_handle,
1006 mlx5_dev_interrupt_handler,
1008 if (priv->pending_alarm)
1009 rte_eal_alarm_cancel(mlx5_dev_link_status_handler, dev);
1010 priv->pending_alarm = 0;
1011 priv->intr_handle.fd = 0;
1012 priv->intr_handle.type = 0;
1016 * Install interrupt handler.
1019 * Pointer to private structure.
1021 * Pointer to the rte_eth_dev structure.
1024 priv_dev_interrupt_handler_install(struct priv *priv, struct rte_eth_dev *dev)
1028 if (!dev->data->dev_conf.intr_conf.lsc)
1030 assert(priv->ctx->async_fd > 0);
1031 flags = fcntl(priv->ctx->async_fd, F_GETFL);
1032 rc = fcntl(priv->ctx->async_fd, F_SETFL, flags | O_NONBLOCK);
1034 INFO("failed to change file descriptor async event queue");
1035 dev->data->dev_conf.intr_conf.lsc = 0;
1037 priv->intr_handle.fd = priv->ctx->async_fd;
1038 priv->intr_handle.type = RTE_INTR_HANDLE_EXT;
1039 rte_intr_callback_register(&priv->intr_handle,
1040 mlx5_dev_interrupt_handler,
1046 * Change the link state (UP / DOWN).
1049 * Pointer to Ethernet device structure.
1051 * Nonzero for link up, otherwise link down.
1054 * 0 on success, errno value on failure.
1057 priv_set_link(struct priv *priv, int up)
1059 struct rte_eth_dev *dev = priv->dev;
1064 err = priv_set_flags(priv, ~IFF_UP, IFF_UP);
1067 for (i = 0; i < priv->rxqs_n; i++)
1068 if ((*priv->rxqs)[i]->sp)
1070 /* Check if an sp queue exists.
1071 * Note: Some old frames might be received.
1073 if (i == priv->rxqs_n)
1074 dev->rx_pkt_burst = mlx5_rx_burst;
1076 dev->rx_pkt_burst = mlx5_rx_burst_sp;
1077 dev->tx_pkt_burst = mlx5_tx_burst;
1079 err = priv_set_flags(priv, ~IFF_UP, ~IFF_UP);
1082 dev->rx_pkt_burst = removed_rx_burst;
1083 dev->tx_pkt_burst = removed_tx_burst;
1089 * DPDK callback to bring the link DOWN.
1092 * Pointer to Ethernet device structure.
1095 * 0 on success, errno value on failure.
1098 mlx5_set_link_down(struct rte_eth_dev *dev)
1100 struct priv *priv = dev->data->dev_private;
1104 err = priv_set_link(priv, 0);
1110 * DPDK callback to bring the link UP.
1113 * Pointer to Ethernet device structure.
1116 * 0 on success, errno value on failure.
1119 mlx5_set_link_up(struct rte_eth_dev *dev)
1121 struct priv *priv = dev->data->dev_private;
1125 err = priv_set_link(priv, 1);
1131 * Configure secondary process queues from a private data pointer (primary
1132 * or secondary) and update burst callbacks. Can take place only once.
1134 * All queues must have been previously created by the primary process to
1135 * avoid undefined behavior.
1138 * Private data pointer from either primary or secondary process.
1141 * Private data pointer from secondary process, NULL in case of error.
1144 mlx5_secondary_data_setup(struct priv *priv)
1146 unsigned int port_id = 0;
1147 struct mlx5_secondary_data *sd;
1150 unsigned int nb_tx_queues;
1151 unsigned int nb_rx_queues;
1154 /* priv must be valid at this point. */
1155 assert(priv != NULL);
1156 /* priv->dev must also be valid but may point to local memory from
1157 * another process, possibly with the same address and must not
1158 * be dereferenced yet. */
1159 assert(priv->dev != NULL);
1160 /* Determine port ID by finding out where priv comes from. */
1162 sd = &mlx5_secondary_data[port_id];
1163 rte_spinlock_lock(&sd->lock);
1164 /* Primary process? */
1165 if (sd->primary_priv == priv)
1167 /* Secondary process? */
1168 if (sd->data.dev_private == priv)
1170 rte_spinlock_unlock(&sd->lock);
1171 if (++port_id == RTE_DIM(mlx5_secondary_data))
1174 /* Switch to secondary private structure. If private data has already
1175 * been updated by another thread, there is nothing else to do. */
1176 priv = sd->data.dev_private;
1177 if (priv->dev->data == &sd->data)
1179 /* Sanity checks. Secondary private structure is supposed to point
1180 * to local eth_dev, itself still pointing to the shared device data
1181 * structure allocated by the primary process. */
1182 assert(sd->shared_dev_data != &sd->data);
1183 assert(sd->data.nb_tx_queues == 0);
1184 assert(sd->data.tx_queues == NULL);
1185 assert(sd->data.nb_rx_queues == 0);
1186 assert(sd->data.rx_queues == NULL);
1187 assert(priv != sd->primary_priv);
1188 assert(priv->dev->data == sd->shared_dev_data);
1189 assert(priv->txqs_n == 0);
1190 assert(priv->txqs == NULL);
1191 assert(priv->rxqs_n == 0);
1192 assert(priv->rxqs == NULL);
1193 nb_tx_queues = sd->shared_dev_data->nb_tx_queues;
1194 nb_rx_queues = sd->shared_dev_data->nb_rx_queues;
1195 /* Allocate local storage for queues. */
1196 tx_queues = rte_zmalloc("secondary ethdev->tx_queues",
1197 sizeof(sd->data.tx_queues[0]) * nb_tx_queues,
1198 RTE_CACHE_LINE_SIZE);
1199 rx_queues = rte_zmalloc("secondary ethdev->rx_queues",
1200 sizeof(sd->data.rx_queues[0]) * nb_rx_queues,
1201 RTE_CACHE_LINE_SIZE);
1202 if (tx_queues == NULL || rx_queues == NULL)
1204 /* Lock to prevent control operations during setup. */
1207 for (i = 0; i != nb_tx_queues; ++i) {
1208 struct txq *primary_txq = (*sd->primary_priv->txqs)[i];
1211 if (primary_txq == NULL)
1213 txq = rte_calloc_socket("TXQ", 1, sizeof(*txq), 0,
1214 primary_txq->socket);
1216 if (txq_setup(priv->dev,
1218 primary_txq->elts_n * MLX5_PMD_SGE_WR_N,
1219 primary_txq->socket,
1221 txq->stats.idx = primary_txq->stats.idx;
1228 txq = tx_queues[--i];
1235 for (i = 0; i != nb_rx_queues; ++i) {
1236 struct rxq *primary_rxq = (*sd->primary_priv->rxqs)[i];
1238 if (primary_rxq == NULL)
1240 /* Not supported yet. */
1241 rx_queues[i] = NULL;
1243 /* Update everything. */
1244 priv->txqs = (void *)tx_queues;
1245 priv->txqs_n = nb_tx_queues;
1246 priv->rxqs = (void *)rx_queues;
1247 priv->rxqs_n = nb_rx_queues;
1248 sd->data.rx_queues = rx_queues;
1249 sd->data.tx_queues = tx_queues;
1250 sd->data.nb_rx_queues = nb_rx_queues;
1251 sd->data.nb_tx_queues = nb_tx_queues;
1252 sd->data.dev_link = sd->shared_dev_data->dev_link;
1253 sd->data.mtu = sd->shared_dev_data->mtu;
1254 memcpy(sd->data.rx_queue_state, sd->shared_dev_data->rx_queue_state,
1255 sizeof(sd->data.rx_queue_state));
1256 memcpy(sd->data.tx_queue_state, sd->shared_dev_data->tx_queue_state,
1257 sizeof(sd->data.tx_queue_state));
1258 sd->data.dev_flags = sd->shared_dev_data->dev_flags;
1259 /* Use local data from now on. */
1261 priv->dev->data = &sd->data;
1263 priv->dev->tx_pkt_burst = mlx5_tx_burst;
1264 priv->dev->rx_pkt_burst = removed_rx_burst;
1267 /* More sanity checks. */
1268 assert(priv->dev->tx_pkt_burst == mlx5_tx_burst);
1269 assert(priv->dev->rx_pkt_burst == removed_rx_burst);
1270 assert(priv->dev->data == &sd->data);
1271 rte_spinlock_unlock(&sd->lock);
1275 rte_free(tx_queues);
1276 rte_free(rx_queues);
1277 rte_spinlock_unlock(&sd->lock);