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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23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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44 #include <sys/ioctl.h>
45 #include <sys/socket.h>
46 #include <sys/utsname.h>
47 #include <netinet/in.h>
48 #include <linux/ethtool.h>
49 #include <linux/sockios.h>
50 #include <linux/version.h>
53 /* DPDK headers don't like -pedantic. */
55 #pragma GCC diagnostic ignored "-Wpedantic"
57 #include <rte_atomic.h>
58 #include <rte_ethdev.h>
60 #include <rte_common.h>
61 #include <rte_interrupts.h>
62 #include <rte_alarm.h>
63 #include <rte_malloc.h>
65 #pragma GCC diagnostic error "-Wpedantic"
69 #include "mlx5_rxtx.h"
70 #include "mlx5_utils.h"
72 /* Add defines in case the running kernel is not the same as user headers. */
73 #ifndef ETHTOOL_GLINKSETTINGS
74 struct ethtool_link_settings {
83 uint8_t eth_tp_mdix_ctrl;
84 int8_t link_mode_masks_nwords;
86 uint32_t link_mode_masks[];
89 #define ETHTOOL_GLINKSETTINGS 0x0000004c
90 #define ETHTOOL_LINK_MODE_1000baseT_Full_BIT 5
91 #define ETHTOOL_LINK_MODE_Autoneg_BIT 6
92 #define ETHTOOL_LINK_MODE_1000baseKX_Full_BIT 17
93 #define ETHTOOL_LINK_MODE_10000baseKX4_Full_BIT 18
94 #define ETHTOOL_LINK_MODE_10000baseKR_Full_BIT 19
95 #define ETHTOOL_LINK_MODE_10000baseR_FEC_BIT 20
96 #define ETHTOOL_LINK_MODE_20000baseMLD2_Full_BIT 21
97 #define ETHTOOL_LINK_MODE_20000baseKR2_Full_BIT 22
98 #define ETHTOOL_LINK_MODE_40000baseKR4_Full_BIT 23
99 #define ETHTOOL_LINK_MODE_40000baseCR4_Full_BIT 24
100 #define ETHTOOL_LINK_MODE_40000baseSR4_Full_BIT 25
101 #define ETHTOOL_LINK_MODE_40000baseLR4_Full_BIT 26
102 #define ETHTOOL_LINK_MODE_56000baseKR4_Full_BIT 27
103 #define ETHTOOL_LINK_MODE_56000baseCR4_Full_BIT 28
104 #define ETHTOOL_LINK_MODE_56000baseSR4_Full_BIT 29
105 #define ETHTOOL_LINK_MODE_56000baseLR4_Full_BIT 30
107 #ifndef HAVE_ETHTOOL_LINK_MODE_25G
108 #define ETHTOOL_LINK_MODE_25000baseCR_Full_BIT 31
109 #define ETHTOOL_LINK_MODE_25000baseKR_Full_BIT 32
110 #define ETHTOOL_LINK_MODE_25000baseSR_Full_BIT 33
112 #ifndef HAVE_ETHTOOL_LINK_MODE_50G
113 #define ETHTOOL_LINK_MODE_50000baseCR2_Full_BIT 34
114 #define ETHTOOL_LINK_MODE_50000baseKR2_Full_BIT 35
116 #ifndef HAVE_ETHTOOL_LINK_MODE_100G
117 #define ETHTOOL_LINK_MODE_100000baseKR4_Full_BIT 36
118 #define ETHTOOL_LINK_MODE_100000baseSR4_Full_BIT 37
119 #define ETHTOOL_LINK_MODE_100000baseCR4_Full_BIT 38
120 #define ETHTOOL_LINK_MODE_100000baseLR4_ER4_Full_BIT 39
122 #define ETHTOOL_LINK_MODE_MASK_MAX_KERNEL_NU32 (SCHAR_MAX)
125 * Return private structure associated with an Ethernet device.
128 * Pointer to Ethernet device structure.
131 * Pointer to private structure.
134 mlx5_get_priv(struct rte_eth_dev *dev)
136 struct mlx5_secondary_data *sd;
138 if (!mlx5_is_secondary())
139 return dev->data->dev_private;
140 sd = &mlx5_secondary_data[dev->data->port_id];
141 return sd->data.dev_private;
145 * Check if running as a secondary process.
148 * Nonzero if running as a secondary process.
151 mlx5_is_secondary(void)
153 return rte_eal_process_type() != RTE_PROC_PRIMARY;
157 * Get interface name from private structure.
160 * Pointer to private structure.
162 * Interface name output buffer.
165 * 0 on success, -1 on failure and errno is set.
168 priv_get_ifname(const struct priv *priv, char (*ifname)[IF_NAMESIZE])
172 unsigned int dev_type = 0;
173 unsigned int dev_port_prev = ~0u;
174 char match[IF_NAMESIZE] = "";
177 MKSTR(path, "%s/device/net", priv->ctx->device->ibdev_path);
183 while ((dent = readdir(dir)) != NULL) {
184 char *name = dent->d_name;
186 unsigned int dev_port;
189 if ((name[0] == '.') &&
190 ((name[1] == '\0') ||
191 ((name[1] == '.') && (name[2] == '\0'))))
194 MKSTR(path, "%s/device/net/%s/%s",
195 priv->ctx->device->ibdev_path, name,
196 (dev_type ? "dev_id" : "dev_port"));
198 file = fopen(path, "rb");
203 * Switch to dev_id when dev_port does not exist as
204 * is the case with Linux kernel versions < 3.15.
215 r = fscanf(file, (dev_type ? "%x" : "%u"), &dev_port);
220 * Switch to dev_id when dev_port returns the same value for
221 * all ports. May happen when using a MOFED release older than
222 * 3.0 with a Linux kernel >= 3.15.
224 if (dev_port == dev_port_prev)
226 dev_port_prev = dev_port;
227 if (dev_port == (priv->port - 1u))
228 snprintf(match, sizeof(match), "%s", name);
231 if (match[0] == '\0')
233 strncpy(*ifname, match, sizeof(*ifname));
238 * Read from sysfs entry.
241 * Pointer to private structure.
243 * Entry name relative to sysfs path.
245 * Data output buffer.
250 * 0 on success, -1 on failure and errno is set.
253 priv_sysfs_read(const struct priv *priv, const char *entry,
254 char *buf, size_t size)
256 char ifname[IF_NAMESIZE];
261 if (priv_get_ifname(priv, &ifname))
264 MKSTR(path, "%s/device/net/%s/%s", priv->ctx->device->ibdev_path,
267 file = fopen(path, "rb");
270 ret = fread(buf, 1, size, file);
272 if (((size_t)ret < size) && (ferror(file)))
282 * Write to sysfs entry.
285 * Pointer to private structure.
287 * Entry name relative to sysfs path.
294 * 0 on success, -1 on failure and errno is set.
297 priv_sysfs_write(const struct priv *priv, const char *entry,
298 char *buf, size_t size)
300 char ifname[IF_NAMESIZE];
305 if (priv_get_ifname(priv, &ifname))
308 MKSTR(path, "%s/device/net/%s/%s", priv->ctx->device->ibdev_path,
311 file = fopen(path, "wb");
314 ret = fwrite(buf, 1, size, file);
316 if (((size_t)ret < size) || (ferror(file)))
326 * Get unsigned long sysfs property.
329 * Pointer to private structure.
331 * Entry name relative to sysfs path.
333 * Value output buffer.
336 * 0 on success, -1 on failure and errno is set.
339 priv_get_sysfs_ulong(struct priv *priv, const char *name, unsigned long *value)
342 unsigned long value_ret;
345 ret = priv_sysfs_read(priv, name, value_str, (sizeof(value_str) - 1));
347 DEBUG("cannot read %s value from sysfs: %s",
348 name, strerror(errno));
351 value_str[ret] = '\0';
353 value_ret = strtoul(value_str, NULL, 0);
355 DEBUG("invalid %s value `%s': %s", name, value_str,
364 * Set unsigned long sysfs property.
367 * Pointer to private structure.
369 * Entry name relative to sysfs path.
374 * 0 on success, -1 on failure and errno is set.
377 priv_set_sysfs_ulong(struct priv *priv, const char *name, unsigned long value)
380 MKSTR(value_str, "%lu", value);
382 ret = priv_sysfs_write(priv, name, value_str, (sizeof(value_str) - 1));
384 DEBUG("cannot write %s `%s' (%lu) to sysfs: %s",
385 name, value_str, value, strerror(errno));
392 * Perform ifreq ioctl() on associated Ethernet device.
395 * Pointer to private structure.
397 * Request number to pass to ioctl().
399 * Interface request structure output buffer.
402 * 0 on success, -1 on failure and errno is set.
405 priv_ifreq(const struct priv *priv, int req, struct ifreq *ifr)
407 int sock = socket(PF_INET, SOCK_DGRAM, IPPROTO_IP);
412 if (priv_get_ifname(priv, &ifr->ifr_name) == 0)
413 ret = ioctl(sock, req, ifr);
419 * Return the number of active VFs for the current device.
422 * Pointer to private structure.
423 * @param[out] num_vfs
424 * Number of active VFs.
427 * 0 on success, -1 on failure and errno is set.
430 priv_get_num_vfs(struct priv *priv, uint16_t *num_vfs)
432 /* The sysfs entry name depends on the operating system. */
433 const char **name = (const char *[]){
434 "device/sriov_numvfs",
435 "device/mlx5_num_vfs",
441 unsigned long ulong_num_vfs;
443 ret = priv_get_sysfs_ulong(priv, *name, &ulong_num_vfs);
445 *num_vfs = ulong_num_vfs;
446 } while (*(++name) && ret);
454 * Pointer to private structure.
456 * MTU value output buffer.
459 * 0 on success, -1 on failure and errno is set.
462 priv_get_mtu(struct priv *priv, uint16_t *mtu)
464 unsigned long ulong_mtu;
466 if (priv_get_sysfs_ulong(priv, "mtu", &ulong_mtu) == -1)
476 * Pointer to private structure.
481 * 0 on success, -1 on failure and errno is set.
484 priv_set_mtu(struct priv *priv, uint16_t mtu)
488 if (priv_set_sysfs_ulong(priv, "mtu", mtu) ||
489 priv_get_mtu(priv, &new_mtu))
501 * Pointer to private structure.
503 * Bitmask for flags that must remain untouched.
505 * Bitmask for flags to modify.
508 * 0 on success, -1 on failure and errno is set.
511 priv_set_flags(struct priv *priv, unsigned int keep, unsigned int flags)
515 if (priv_get_sysfs_ulong(priv, "flags", &tmp) == -1)
518 tmp |= (flags & (~keep));
519 return priv_set_sysfs_ulong(priv, "flags", tmp);
523 * Ethernet device configuration.
525 * Prepare the driver for a given number of TX and RX queues.
528 * Pointer to Ethernet device structure.
531 * 0 on success, errno value on failure.
534 dev_configure(struct rte_eth_dev *dev)
536 struct priv *priv = dev->data->dev_private;
537 unsigned int rxqs_n = dev->data->nb_rx_queues;
538 unsigned int txqs_n = dev->data->nb_tx_queues;
541 unsigned int reta_idx_n;
543 priv->rss_hf = dev->data->dev_conf.rx_adv_conf.rss_conf.rss_hf;
544 priv->rxqs = (void *)dev->data->rx_queues;
545 priv->txqs = (void *)dev->data->tx_queues;
546 if (txqs_n != priv->txqs_n) {
547 INFO("%p: TX queues number update: %u -> %u",
548 (void *)dev, priv->txqs_n, txqs_n);
549 priv->txqs_n = txqs_n;
551 if (rxqs_n > priv->ind_table_max_size) {
552 ERROR("cannot handle this many RX queues (%u)", rxqs_n);
555 if (rxqs_n == priv->rxqs_n)
557 INFO("%p: RX queues number update: %u -> %u",
558 (void *)dev, priv->rxqs_n, rxqs_n);
559 priv->rxqs_n = rxqs_n;
560 /* If the requested number of RX queues is not a power of two, use the
561 * maximum indirection table size for better balancing.
562 * The result is always rounded to the next power of two. */
563 reta_idx_n = (1 << log2above((rxqs_n & (rxqs_n - 1)) ?
564 priv->ind_table_max_size :
566 if (priv_rss_reta_index_resize(priv, reta_idx_n))
568 /* When the number of RX queues is not a power of two, the remaining
569 * table entries are padded with reused WQs and hashes are not spread
571 for (i = 0, j = 0; (i != reta_idx_n); ++i) {
572 (*priv->reta_idx)[i] = j;
580 * DPDK callback for Ethernet device configuration.
583 * Pointer to Ethernet device structure.
586 * 0 on success, negative errno value on failure.
589 mlx5_dev_configure(struct rte_eth_dev *dev)
591 struct priv *priv = dev->data->dev_private;
594 if (mlx5_is_secondary())
595 return -E_RTE_SECONDARY;
598 ret = dev_configure(dev);
605 * DPDK callback to get information about the device.
608 * Pointer to Ethernet device structure.
610 * Info structure output buffer.
613 mlx5_dev_infos_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *info)
615 struct priv *priv = mlx5_get_priv(dev);
617 char ifname[IF_NAMESIZE];
620 /* FIXME: we should ask the device for these values. */
621 info->min_rx_bufsize = 32;
622 info->max_rx_pktlen = 65536;
624 * Since we need one CQ per QP, the limit is the minimum number
625 * between the two values.
627 max = ((priv->device_attr.max_cq > priv->device_attr.max_qp) ?
628 priv->device_attr.max_qp : priv->device_attr.max_cq);
629 /* If max >= 65535 then max = 0, max_rx_queues is uint16_t. */
632 info->max_rx_queues = max;
633 info->max_tx_queues = max;
634 info->max_mac_addrs = RTE_DIM(priv->mac);
635 info->rx_offload_capa =
637 (DEV_RX_OFFLOAD_IPV4_CKSUM |
638 DEV_RX_OFFLOAD_UDP_CKSUM |
639 DEV_RX_OFFLOAD_TCP_CKSUM) :
641 (priv->hw_vlan_strip ? DEV_RX_OFFLOAD_VLAN_STRIP : 0);
643 info->tx_offload_capa = DEV_TX_OFFLOAD_VLAN_INSERT;
645 info->tx_offload_capa |=
646 (DEV_TX_OFFLOAD_IPV4_CKSUM |
647 DEV_TX_OFFLOAD_UDP_CKSUM |
648 DEV_TX_OFFLOAD_TCP_CKSUM);
649 if (priv_get_ifname(priv, &ifname) == 0)
650 info->if_index = if_nametoindex(ifname);
651 /* FIXME: RETA update/query API expects the callee to know the size of
652 * the indirection table, for this PMD the size varies depending on
653 * the number of RX queues, it becomes impossible to find the correct
654 * size if it is not fixed.
655 * The API should be updated to solve this problem. */
656 info->reta_size = priv->ind_table_max_size;
657 info->hash_key_size = ((*priv->rss_conf) ?
658 (*priv->rss_conf)[0]->rss_key_len :
660 info->speed_capa = priv->link_speed_capa;
665 mlx5_dev_supported_ptypes_get(struct rte_eth_dev *dev)
667 static const uint32_t ptypes[] = {
668 /* refers to rxq_cq_to_pkt_type() */
669 RTE_PTYPE_L3_IPV4_EXT_UNKNOWN,
670 RTE_PTYPE_L3_IPV6_EXT_UNKNOWN,
671 RTE_PTYPE_INNER_L3_IPV4_EXT_UNKNOWN,
672 RTE_PTYPE_INNER_L3_IPV6_EXT_UNKNOWN,
677 if (dev->rx_pkt_burst == mlx5_rx_burst)
683 * Retrieve physical link information (unlocked version using legacy ioctl).
686 * Pointer to Ethernet device structure.
687 * @param wait_to_complete
688 * Wait for request completion (ignored).
691 mlx5_link_update_unlocked_gset(struct rte_eth_dev *dev, int wait_to_complete)
693 struct priv *priv = mlx5_get_priv(dev);
694 struct ethtool_cmd edata = {
695 .cmd = ETHTOOL_GSET /* Deprecated since Linux v4.5. */
698 struct rte_eth_link dev_link;
701 (void)wait_to_complete;
702 if (priv_ifreq(priv, SIOCGIFFLAGS, &ifr)) {
703 WARN("ioctl(SIOCGIFFLAGS) failed: %s", strerror(errno));
706 memset(&dev_link, 0, sizeof(dev_link));
707 dev_link.link_status = ((ifr.ifr_flags & IFF_UP) &&
708 (ifr.ifr_flags & IFF_RUNNING));
709 ifr.ifr_data = (void *)&edata;
710 if (priv_ifreq(priv, SIOCETHTOOL, &ifr)) {
711 WARN("ioctl(SIOCETHTOOL, ETHTOOL_GSET) failed: %s",
715 link_speed = ethtool_cmd_speed(&edata);
716 if (link_speed == -1)
717 dev_link.link_speed = 0;
719 dev_link.link_speed = link_speed;
720 priv->link_speed_capa = 0;
721 if (edata.supported & SUPPORTED_Autoneg)
722 priv->link_speed_capa |= ETH_LINK_SPEED_AUTONEG;
723 if (edata.supported & (SUPPORTED_1000baseT_Full |
724 SUPPORTED_1000baseKX_Full))
725 priv->link_speed_capa |= ETH_LINK_SPEED_1G;
726 if (edata.supported & SUPPORTED_10000baseKR_Full)
727 priv->link_speed_capa |= ETH_LINK_SPEED_10G;
728 if (edata.supported & (SUPPORTED_40000baseKR4_Full |
729 SUPPORTED_40000baseCR4_Full |
730 SUPPORTED_40000baseSR4_Full |
731 SUPPORTED_40000baseLR4_Full))
732 priv->link_speed_capa |= ETH_LINK_SPEED_40G;
733 dev_link.link_duplex = ((edata.duplex == DUPLEX_HALF) ?
734 ETH_LINK_HALF_DUPLEX : ETH_LINK_FULL_DUPLEX);
735 dev_link.link_autoneg = !(dev->data->dev_conf.link_speeds &
736 ETH_LINK_SPEED_FIXED);
737 if (memcmp(&dev_link, &dev->data->dev_link, sizeof(dev_link))) {
738 /* Link status changed. */
739 dev->data->dev_link = dev_link;
742 /* Link status is still the same. */
747 * Retrieve physical link information (unlocked version using new ioctl).
750 * Pointer to Ethernet device structure.
751 * @param wait_to_complete
752 * Wait for request completion (ignored).
755 mlx5_link_update_unlocked_gs(struct rte_eth_dev *dev, int wait_to_complete)
757 struct priv *priv = mlx5_get_priv(dev);
758 __extension__ struct {
759 struct ethtool_link_settings edata;
760 uint32_t link_mode_data[3 *
761 ETHTOOL_LINK_MODE_MASK_MAX_KERNEL_NU32];
765 struct rte_eth_link dev_link;
768 (void)wait_to_complete;
769 if (priv_ifreq(priv, SIOCGIFFLAGS, &ifr)) {
770 WARN("ioctl(SIOCGIFFLAGS) failed: %s", strerror(errno));
773 memset(&dev_link, 0, sizeof(dev_link));
774 dev_link.link_status = ((ifr.ifr_flags & IFF_UP) &&
775 (ifr.ifr_flags & IFF_RUNNING));
776 memset(&ecmd, 0, sizeof(ecmd));
777 ecmd.edata.cmd = ETHTOOL_GLINKSETTINGS;
778 ifr.ifr_data = (void *)&ecmd;
779 if (priv_ifreq(priv, SIOCETHTOOL, &ifr)) {
780 DEBUG("ioctl(SIOCETHTOOL, ETHTOOL_GLINKSETTINGS) failed: %s",
784 ecmd.edata.link_mode_masks_nwords = -ecmd.edata.link_mode_masks_nwords;
785 if (priv_ifreq(priv, SIOCETHTOOL, &ifr)) {
786 DEBUG("ioctl(SIOCETHTOOL, ETHTOOL_GLINKSETTINGS) failed: %s",
790 dev_link.link_speed = ecmd.edata.speed;
791 sc = ecmd.edata.link_mode_masks[0] |
792 ((uint64_t)ecmd.edata.link_mode_masks[1] << 32);
793 priv->link_speed_capa = 0;
794 if (sc & ETHTOOL_LINK_MODE_Autoneg_BIT)
795 priv->link_speed_capa |= ETH_LINK_SPEED_AUTONEG;
796 if (sc & (ETHTOOL_LINK_MODE_1000baseT_Full_BIT |
797 ETHTOOL_LINK_MODE_1000baseKX_Full_BIT))
798 priv->link_speed_capa |= ETH_LINK_SPEED_1G;
799 if (sc & (ETHTOOL_LINK_MODE_10000baseKX4_Full_BIT |
800 ETHTOOL_LINK_MODE_10000baseKR_Full_BIT |
801 ETHTOOL_LINK_MODE_10000baseR_FEC_BIT))
802 priv->link_speed_capa |= ETH_LINK_SPEED_10G;
803 if (sc & (ETHTOOL_LINK_MODE_20000baseMLD2_Full_BIT |
804 ETHTOOL_LINK_MODE_20000baseKR2_Full_BIT))
805 priv->link_speed_capa |= ETH_LINK_SPEED_20G;
806 if (sc & (ETHTOOL_LINK_MODE_40000baseKR4_Full_BIT |
807 ETHTOOL_LINK_MODE_40000baseCR4_Full_BIT |
808 ETHTOOL_LINK_MODE_40000baseSR4_Full_BIT |
809 ETHTOOL_LINK_MODE_40000baseLR4_Full_BIT))
810 priv->link_speed_capa |= ETH_LINK_SPEED_40G;
811 if (sc & (ETHTOOL_LINK_MODE_56000baseKR4_Full_BIT |
812 ETHTOOL_LINK_MODE_56000baseCR4_Full_BIT |
813 ETHTOOL_LINK_MODE_56000baseSR4_Full_BIT |
814 ETHTOOL_LINK_MODE_56000baseLR4_Full_BIT))
815 priv->link_speed_capa |= ETH_LINK_SPEED_56G;
816 if (sc & (ETHTOOL_LINK_MODE_25000baseCR_Full_BIT |
817 ETHTOOL_LINK_MODE_25000baseKR_Full_BIT |
818 ETHTOOL_LINK_MODE_25000baseSR_Full_BIT))
819 priv->link_speed_capa |= ETH_LINK_SPEED_25G;
820 if (sc & (ETHTOOL_LINK_MODE_50000baseCR2_Full_BIT |
821 ETHTOOL_LINK_MODE_50000baseKR2_Full_BIT))
822 priv->link_speed_capa |= ETH_LINK_SPEED_50G;
823 if (sc & (ETHTOOL_LINK_MODE_100000baseKR4_Full_BIT |
824 ETHTOOL_LINK_MODE_100000baseSR4_Full_BIT |
825 ETHTOOL_LINK_MODE_100000baseCR4_Full_BIT |
826 ETHTOOL_LINK_MODE_100000baseLR4_ER4_Full_BIT))
827 priv->link_speed_capa |= ETH_LINK_SPEED_100G;
828 dev_link.link_duplex = ((ecmd.edata.duplex == DUPLEX_HALF) ?
829 ETH_LINK_HALF_DUPLEX : ETH_LINK_FULL_DUPLEX);
830 dev_link.link_autoneg = !(dev->data->dev_conf.link_speeds &
831 ETH_LINK_SPEED_FIXED);
832 if (memcmp(&dev_link, &dev->data->dev_link, sizeof(dev_link))) {
833 /* Link status changed. */
834 dev->data->dev_link = dev_link;
837 /* Link status is still the same. */
842 * DPDK callback to retrieve physical link information (unlocked version).
845 * Pointer to Ethernet device structure.
846 * @param wait_to_complete
847 * Wait for request completion (ignored).
850 mlx5_link_update_unlocked(struct rte_eth_dev *dev, int wait_to_complete)
852 struct utsname utsname;
855 if (uname(&utsname) == -1 ||
856 sscanf(utsname.release, "%d.%d.%d",
857 &ver[0], &ver[1], &ver[2]) != 3 ||
858 KERNEL_VERSION(ver[0], ver[1], ver[2]) < KERNEL_VERSION(4, 9, 0))
859 return mlx5_link_update_unlocked_gset(dev, wait_to_complete);
860 return mlx5_link_update_unlocked_gs(dev, wait_to_complete);
864 * DPDK callback to retrieve physical link information.
867 * Pointer to Ethernet device structure.
868 * @param wait_to_complete
869 * Wait for request completion (ignored).
872 mlx5_link_update(struct rte_eth_dev *dev, int wait_to_complete)
874 struct priv *priv = mlx5_get_priv(dev);
878 ret = mlx5_link_update_unlocked(dev, wait_to_complete);
884 * DPDK callback to change the MTU.
886 * Setting the MTU affects hardware MRU (packets larger than the MTU cannot be
887 * received). Use this as a hint to enable/disable scattered packets support
888 * and improve performance when not needed.
889 * Since failure is not an option, reconfiguring queues on the fly is not
893 * Pointer to Ethernet device structure.
898 * 0 on success, negative errno value on failure.
901 mlx5_dev_set_mtu(struct rte_eth_dev *dev, uint16_t mtu)
903 struct priv *priv = dev->data->dev_private;
906 uint16_t (*rx_func)(void *, struct rte_mbuf **, uint16_t) =
908 unsigned int max_frame_len;
910 int restart = priv->started;
912 if (mlx5_is_secondary())
913 return -E_RTE_SECONDARY;
916 /* Set kernel interface MTU first. */
917 if (priv_set_mtu(priv, mtu)) {
919 WARN("cannot set port %u MTU to %u: %s", priv->port, mtu,
923 DEBUG("adapter port %u MTU set to %u", priv->port, mtu);
924 /* Temporarily replace RX handler with a fake one, assuming it has not
925 * been copied elsewhere. */
926 dev->rx_pkt_burst = removed_rx_burst;
927 /* Make sure everyone has left mlx5_rx_burst() and uses
928 * removed_rx_burst() instead. */
931 /* MTU does not include header and CRC. */
932 max_frame_len = ETHER_HDR_LEN + mtu + ETHER_CRC_LEN;
933 /* Check if at least one queue is going to need a SGE update. */
934 for (i = 0; i != priv->rxqs_n; ++i) {
935 struct rxq *rxq = (*priv->rxqs)[i];
937 unsigned int size = RTE_PKTMBUF_HEADROOM + max_frame_len;
942 mb_len = rte_pktmbuf_data_room_size(rxq->mp);
943 assert(mb_len >= RTE_PKTMBUF_HEADROOM);
945 * Determine the number of SGEs needed for a full packet
946 * and round it to the next power of two.
948 sges_n = log2above((size / mb_len) + !!(size % mb_len));
949 if (sges_n != rxq->sges_n)
953 * If all queues have the right number of SGEs, a simple rehash
954 * of their buffers is enough, otherwise SGE information can only
955 * be updated in a queue by recreating it. All resources that depend
956 * on queues (flows, indirection tables) must be recreated as well in
959 rehash = (i == priv->rxqs_n);
961 /* Clean up everything as with mlx5_dev_stop(). */
962 priv_special_flow_disable_all(priv);
963 priv_mac_addrs_disable(priv);
964 priv_destroy_hash_rxqs(priv);
965 priv_fdir_disable(priv);
966 priv_dev_interrupt_handler_uninstall(priv, dev);
969 /* Reconfigure each RX queue. */
970 for (i = 0; (i != priv->rxqs_n); ++i) {
971 struct rxq *rxq = (*priv->rxqs)[i];
972 struct rxq_ctrl *rxq_ctrl =
973 container_of(rxq, struct rxq_ctrl, rxq);
980 mb_len = rte_pktmbuf_data_room_size(rxq->mp);
981 assert(mb_len >= RTE_PKTMBUF_HEADROOM);
982 /* Toggle scattered support (sp) if necessary. */
983 sp = (max_frame_len > (mb_len - RTE_PKTMBUF_HEADROOM));
984 /* Provide new values to rxq_setup(). */
985 dev->data->dev_conf.rxmode.jumbo_frame = sp;
986 dev->data->dev_conf.rxmode.max_rx_pkt_len = max_frame_len;
988 ret = rxq_rehash(dev, rxq_ctrl);
990 ret = rxq_ctrl_setup(dev, rxq_ctrl, 1 << rxq->elts_n,
991 rxq_ctrl->socket, NULL, rxq->mp);
994 /* Attempt to roll back in case of error. */
995 tmp = (mb_len << rxq->sges_n) - RTE_PKTMBUF_HEADROOM;
996 if (max_frame_len != tmp) {
1000 /* Double fault, disable RX. */
1004 * Use a safe RX burst function in case of error, otherwise mimic
1008 ERROR("unable to reconfigure RX queues, RX disabled");
1009 rx_func = removed_rx_burst;
1010 } else if (restart &&
1012 !priv_create_hash_rxqs(priv) &&
1013 !priv_rehash_flows(priv)) {
1014 if (dev->data->dev_conf.fdir_conf.mode == RTE_FDIR_MODE_NONE)
1015 priv_fdir_enable(priv);
1016 priv_dev_interrupt_handler_install(priv, dev);
1019 /* Burst functions can now be called again. */
1021 dev->rx_pkt_burst = rx_func;
1029 * DPDK callback to get flow control status.
1032 * Pointer to Ethernet device structure.
1033 * @param[out] fc_conf
1034 * Flow control output buffer.
1037 * 0 on success, negative errno value on failure.
1040 mlx5_dev_get_flow_ctrl(struct rte_eth_dev *dev, struct rte_eth_fc_conf *fc_conf)
1042 struct priv *priv = dev->data->dev_private;
1044 struct ethtool_pauseparam ethpause = {
1045 .cmd = ETHTOOL_GPAUSEPARAM
1049 if (mlx5_is_secondary())
1050 return -E_RTE_SECONDARY;
1052 ifr.ifr_data = (void *)ðpause;
1054 if (priv_ifreq(priv, SIOCETHTOOL, &ifr)) {
1056 WARN("ioctl(SIOCETHTOOL, ETHTOOL_GPAUSEPARAM)"
1062 fc_conf->autoneg = ethpause.autoneg;
1063 if (ethpause.rx_pause && ethpause.tx_pause)
1064 fc_conf->mode = RTE_FC_FULL;
1065 else if (ethpause.rx_pause)
1066 fc_conf->mode = RTE_FC_RX_PAUSE;
1067 else if (ethpause.tx_pause)
1068 fc_conf->mode = RTE_FC_TX_PAUSE;
1070 fc_conf->mode = RTE_FC_NONE;
1080 * DPDK callback to modify flow control parameters.
1083 * Pointer to Ethernet device structure.
1084 * @param[in] fc_conf
1085 * Flow control parameters.
1088 * 0 on success, negative errno value on failure.
1091 mlx5_dev_set_flow_ctrl(struct rte_eth_dev *dev, struct rte_eth_fc_conf *fc_conf)
1093 struct priv *priv = dev->data->dev_private;
1095 struct ethtool_pauseparam ethpause = {
1096 .cmd = ETHTOOL_SPAUSEPARAM
1100 if (mlx5_is_secondary())
1101 return -E_RTE_SECONDARY;
1103 ifr.ifr_data = (void *)ðpause;
1104 ethpause.autoneg = fc_conf->autoneg;
1105 if (((fc_conf->mode & RTE_FC_FULL) == RTE_FC_FULL) ||
1106 (fc_conf->mode & RTE_FC_RX_PAUSE))
1107 ethpause.rx_pause = 1;
1109 ethpause.rx_pause = 0;
1111 if (((fc_conf->mode & RTE_FC_FULL) == RTE_FC_FULL) ||
1112 (fc_conf->mode & RTE_FC_TX_PAUSE))
1113 ethpause.tx_pause = 1;
1115 ethpause.tx_pause = 0;
1118 if (priv_ifreq(priv, SIOCETHTOOL, &ifr)) {
1120 WARN("ioctl(SIOCETHTOOL, ETHTOOL_SPAUSEPARAM)"
1134 * Get PCI information from struct ibv_device.
1137 * Pointer to Ethernet device structure.
1138 * @param[out] pci_addr
1139 * PCI bus address output buffer.
1142 * 0 on success, -1 on failure and errno is set.
1145 mlx5_ibv_device_to_pci_addr(const struct ibv_device *device,
1146 struct rte_pci_addr *pci_addr)
1150 MKSTR(path, "%s/device/uevent", device->ibdev_path);
1152 file = fopen(path, "rb");
1155 while (fgets(line, sizeof(line), file) == line) {
1156 size_t len = strlen(line);
1159 /* Truncate long lines. */
1160 if (len == (sizeof(line) - 1))
1161 while (line[(len - 1)] != '\n') {
1165 line[(len - 1)] = ret;
1167 /* Extract information. */
1170 "%" SCNx16 ":%" SCNx8 ":%" SCNx8 ".%" SCNx8 "\n",
1174 &pci_addr->function) == 4) {
1184 * Link status handler.
1187 * Pointer to private structure.
1189 * Pointer to the rte_eth_dev structure.
1192 * Nonzero if the callback process can be called immediately.
1195 priv_dev_link_status_handler(struct priv *priv, struct rte_eth_dev *dev)
1197 struct ibv_async_event event;
1198 struct rte_eth_link *link = &dev->data->dev_link;
1201 /* Read all message and acknowledge them. */
1203 if (ibv_get_async_event(priv->ctx, &event))
1206 if (event.event_type != IBV_EVENT_PORT_ACTIVE &&
1207 event.event_type != IBV_EVENT_PORT_ERR)
1208 DEBUG("event type %d on port %d not handled",
1209 event.event_type, event.element.port_num);
1210 ibv_ack_async_event(&event);
1212 mlx5_link_update(dev, 0);
1213 if (((link->link_speed == 0) && link->link_status) ||
1214 ((link->link_speed != 0) && !link->link_status)) {
1215 if (!priv->pending_alarm) {
1216 /* Inconsistent status, check again later. */
1217 priv->pending_alarm = 1;
1218 rte_eal_alarm_set(MLX5_ALARM_TIMEOUT_US,
1219 mlx5_dev_link_status_handler,
1229 * Handle delayed link status event.
1232 * Registered argument.
1235 mlx5_dev_link_status_handler(void *arg)
1237 struct rte_eth_dev *dev = arg;
1238 struct priv *priv = dev->data->dev_private;
1242 assert(priv->pending_alarm == 1);
1243 priv->pending_alarm = 0;
1244 ret = priv_dev_link_status_handler(priv, dev);
1247 _rte_eth_dev_callback_process(dev, RTE_ETH_EVENT_INTR_LSC, NULL);
1251 * Handle interrupts from the NIC.
1253 * @param[in] intr_handle
1254 * Interrupt handler.
1256 * Callback argument.
1259 mlx5_dev_interrupt_handler(struct rte_intr_handle *intr_handle, void *cb_arg)
1261 struct rte_eth_dev *dev = cb_arg;
1262 struct priv *priv = dev->data->dev_private;
1267 ret = priv_dev_link_status_handler(priv, dev);
1270 _rte_eth_dev_callback_process(dev, RTE_ETH_EVENT_INTR_LSC, NULL);
1274 * Uninstall interrupt handler.
1277 * Pointer to private structure.
1279 * Pointer to the rte_eth_dev structure.
1282 priv_dev_interrupt_handler_uninstall(struct priv *priv, struct rte_eth_dev *dev)
1284 if (!dev->data->dev_conf.intr_conf.lsc)
1286 rte_intr_callback_unregister(&priv->intr_handle,
1287 mlx5_dev_interrupt_handler,
1289 if (priv->pending_alarm)
1290 rte_eal_alarm_cancel(mlx5_dev_link_status_handler, dev);
1291 priv->pending_alarm = 0;
1292 priv->intr_handle.fd = 0;
1293 priv->intr_handle.type = RTE_INTR_HANDLE_UNKNOWN;
1297 * Install interrupt handler.
1300 * Pointer to private structure.
1302 * Pointer to the rte_eth_dev structure.
1305 priv_dev_interrupt_handler_install(struct priv *priv, struct rte_eth_dev *dev)
1309 if (!dev->data->dev_conf.intr_conf.lsc)
1311 assert(priv->ctx->async_fd > 0);
1312 flags = fcntl(priv->ctx->async_fd, F_GETFL);
1313 rc = fcntl(priv->ctx->async_fd, F_SETFL, flags | O_NONBLOCK);
1315 INFO("failed to change file descriptor async event queue");
1316 dev->data->dev_conf.intr_conf.lsc = 0;
1318 priv->intr_handle.fd = priv->ctx->async_fd;
1319 priv->intr_handle.type = RTE_INTR_HANDLE_EXT;
1320 rte_intr_callback_register(&priv->intr_handle,
1321 mlx5_dev_interrupt_handler,
1327 * Change the link state (UP / DOWN).
1330 * Pointer to Ethernet device structure.
1332 * Nonzero for link up, otherwise link down.
1335 * 0 on success, errno value on failure.
1338 priv_set_link(struct priv *priv, int up)
1340 struct rte_eth_dev *dev = priv->dev;
1344 err = priv_set_flags(priv, ~IFF_UP, IFF_UP);
1347 priv_select_tx_function(priv);
1348 priv_select_rx_function(priv);
1350 err = priv_set_flags(priv, ~IFF_UP, ~IFF_UP);
1353 dev->rx_pkt_burst = removed_rx_burst;
1354 dev->tx_pkt_burst = removed_tx_burst;
1360 * DPDK callback to bring the link DOWN.
1363 * Pointer to Ethernet device structure.
1366 * 0 on success, errno value on failure.
1369 mlx5_set_link_down(struct rte_eth_dev *dev)
1371 struct priv *priv = dev->data->dev_private;
1375 err = priv_set_link(priv, 0);
1381 * DPDK callback to bring the link UP.
1384 * Pointer to Ethernet device structure.
1387 * 0 on success, errno value on failure.
1390 mlx5_set_link_up(struct rte_eth_dev *dev)
1392 struct priv *priv = dev->data->dev_private;
1396 err = priv_set_link(priv, 1);
1402 * Configure secondary process queues from a private data pointer (primary
1403 * or secondary) and update burst callbacks. Can take place only once.
1405 * All queues must have been previously created by the primary process to
1406 * avoid undefined behavior.
1409 * Private data pointer from either primary or secondary process.
1412 * Private data pointer from secondary process, NULL in case of error.
1415 mlx5_secondary_data_setup(struct priv *priv)
1417 unsigned int port_id = 0;
1418 struct mlx5_secondary_data *sd;
1421 unsigned int nb_tx_queues;
1422 unsigned int nb_rx_queues;
1425 /* priv must be valid at this point. */
1426 assert(priv != NULL);
1427 /* priv->dev must also be valid but may point to local memory from
1428 * another process, possibly with the same address and must not
1429 * be dereferenced yet. */
1430 assert(priv->dev != NULL);
1431 /* Determine port ID by finding out where priv comes from. */
1433 sd = &mlx5_secondary_data[port_id];
1434 rte_spinlock_lock(&sd->lock);
1435 /* Primary process? */
1436 if (sd->primary_priv == priv)
1438 /* Secondary process? */
1439 if (sd->data.dev_private == priv)
1441 rte_spinlock_unlock(&sd->lock);
1442 if (++port_id == RTE_DIM(mlx5_secondary_data))
1445 /* Switch to secondary private structure. If private data has already
1446 * been updated by another thread, there is nothing else to do. */
1447 priv = sd->data.dev_private;
1448 if (priv->dev->data == &sd->data)
1450 /* Sanity checks. Secondary private structure is supposed to point
1451 * to local eth_dev, itself still pointing to the shared device data
1452 * structure allocated by the primary process. */
1453 assert(sd->shared_dev_data != &sd->data);
1454 assert(sd->data.nb_tx_queues == 0);
1455 assert(sd->data.tx_queues == NULL);
1456 assert(sd->data.nb_rx_queues == 0);
1457 assert(sd->data.rx_queues == NULL);
1458 assert(priv != sd->primary_priv);
1459 assert(priv->dev->data == sd->shared_dev_data);
1460 assert(priv->txqs_n == 0);
1461 assert(priv->txqs == NULL);
1462 assert(priv->rxqs_n == 0);
1463 assert(priv->rxqs == NULL);
1464 nb_tx_queues = sd->shared_dev_data->nb_tx_queues;
1465 nb_rx_queues = sd->shared_dev_data->nb_rx_queues;
1466 /* Allocate local storage for queues. */
1467 tx_queues = rte_zmalloc("secondary ethdev->tx_queues",
1468 sizeof(sd->data.tx_queues[0]) * nb_tx_queues,
1469 RTE_CACHE_LINE_SIZE);
1470 rx_queues = rte_zmalloc("secondary ethdev->rx_queues",
1471 sizeof(sd->data.rx_queues[0]) * nb_rx_queues,
1472 RTE_CACHE_LINE_SIZE);
1473 if (tx_queues == NULL || rx_queues == NULL)
1475 /* Lock to prevent control operations during setup. */
1478 for (i = 0; i != nb_tx_queues; ++i) {
1479 struct txq *primary_txq = (*sd->primary_priv->txqs)[i];
1480 struct txq_ctrl *primary_txq_ctrl;
1481 struct txq_ctrl *txq_ctrl;
1483 if (primary_txq == NULL)
1485 primary_txq_ctrl = container_of(primary_txq,
1486 struct txq_ctrl, txq);
1487 txq_ctrl = rte_calloc_socket("TXQ", 1, sizeof(*txq_ctrl) +
1488 (1 << primary_txq->elts_n) *
1489 sizeof(struct rte_mbuf *), 0,
1490 primary_txq_ctrl->socket);
1491 if (txq_ctrl != NULL) {
1492 if (txq_ctrl_setup(priv->dev,
1494 1 << primary_txq->elts_n,
1495 primary_txq_ctrl->socket,
1497 txq_ctrl->txq.stats.idx =
1498 primary_txq->stats.idx;
1499 tx_queues[i] = &txq_ctrl->txq;
1505 txq_ctrl = tx_queues[--i];
1506 txq_cleanup(txq_ctrl);
1512 for (i = 0; i != nb_rx_queues; ++i) {
1513 struct rxq_ctrl *primary_rxq =
1514 container_of((*sd->primary_priv->rxqs)[i],
1515 struct rxq_ctrl, rxq);
1517 if (primary_rxq == NULL)
1519 /* Not supported yet. */
1520 rx_queues[i] = NULL;
1522 /* Update everything. */
1523 priv->txqs = (void *)tx_queues;
1524 priv->txqs_n = nb_tx_queues;
1525 priv->rxqs = (void *)rx_queues;
1526 priv->rxqs_n = nb_rx_queues;
1527 sd->data.rx_queues = rx_queues;
1528 sd->data.tx_queues = tx_queues;
1529 sd->data.nb_rx_queues = nb_rx_queues;
1530 sd->data.nb_tx_queues = nb_tx_queues;
1531 sd->data.dev_link = sd->shared_dev_data->dev_link;
1532 sd->data.mtu = sd->shared_dev_data->mtu;
1533 memcpy(sd->data.rx_queue_state, sd->shared_dev_data->rx_queue_state,
1534 sizeof(sd->data.rx_queue_state));
1535 memcpy(sd->data.tx_queue_state, sd->shared_dev_data->tx_queue_state,
1536 sizeof(sd->data.tx_queue_state));
1537 sd->data.dev_flags = sd->shared_dev_data->dev_flags;
1538 /* Use local data from now on. */
1540 priv->dev->data = &sd->data;
1542 priv_select_tx_function(priv);
1543 priv_select_rx_function(priv);
1546 /* More sanity checks. */
1547 assert(priv->dev->data == &sd->data);
1548 rte_spinlock_unlock(&sd->lock);
1552 rte_free(tx_queues);
1553 rte_free(rx_queues);
1554 rte_spinlock_unlock(&sd->lock);
1559 * Configure the TX function to use.
1562 * Pointer to private structure.
1565 priv_select_tx_function(struct priv *priv)
1567 priv->dev->tx_pkt_burst = mlx5_tx_burst;
1568 /* Display warning for unsupported configurations. */
1569 if (priv->sriov && priv->mps)
1570 WARN("multi-packet send WQE cannot be used on a SR-IOV setup");
1571 /* Select appropriate TX function. */
1572 if ((priv->sriov == 0) && priv->mps && priv->txq_inline) {
1573 priv->dev->tx_pkt_burst = mlx5_tx_burst_mpw_inline;
1574 DEBUG("selected MPW inline TX function");
1575 } else if ((priv->sriov == 0) && priv->mps) {
1576 priv->dev->tx_pkt_burst = mlx5_tx_burst_mpw;
1577 DEBUG("selected MPW TX function");
1582 * Configure the RX function to use.
1585 * Pointer to private structure.
1588 priv_select_rx_function(struct priv *priv)
1590 priv->dev->rx_pkt_burst = mlx5_rx_burst;