bump version to 12.2.12-pve1

[ceph.git] / ceph / src / dpdk / drivers / net / mlx5 / mlx5_ethdev.c

/*-
 *   BSD LICENSE
 *
 *   Copyright 2015 6WIND S.A.
 *   Copyright 2015 Mellanox.
 *
 *   Redistribution and use in source and binary forms, with or without
 *   modification, are permitted provided that the following conditions
 *   are met:
 *
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in
 *       the documentation and/or other materials provided with the
 *       distribution.
 *     * Neither the name of 6WIND S.A. nor the names of its
 *       contributors may be used to endorse or promote products derived
 *       from this software without specific prior written permission.
 *
 *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include <stddef.h>
#include <assert.h>
#include <unistd.h>
#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <errno.h>
#include <dirent.h>
#include <net/if.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <linux/ethtool.h>
#include <linux/sockios.h>
#include <fcntl.h>

/* DPDK headers don't like -pedantic. */
#ifdef PEDANTIC
#pragma GCC diagnostic ignored "-Wpedantic"
#endif
#include <rte_atomic.h>
#include <rte_ethdev.h>
#include <rte_mbuf.h>
#include <rte_common.h>
#include <rte_interrupts.h>
#include <rte_alarm.h>
#include <rte_malloc.h>
#ifdef PEDANTIC
#pragma GCC diagnostic error "-Wpedantic"
#endif

#include "mlx5.h"
#include "mlx5_rxtx.h"
#include "mlx5_utils.h"

/**
 * Return private structure associated with an Ethernet device.
 *
 * @param dev
 *   Pointer to Ethernet device structure.
 *
 * @return
 *   Pointer to private structure.
 */
struct priv *
mlx5_get_priv(struct rte_eth_dev *dev)
{
        struct mlx5_secondary_data *sd;

        if (!mlx5_is_secondary())
                return dev->data->dev_private;
        sd = &mlx5_secondary_data[dev->data->port_id];
        return sd->data.dev_private;
}

/**
 * Check if running as a secondary process.
 *
 * @return
 *   Nonzero if running as a secondary process.
 */
inline int
mlx5_is_secondary(void)
{
        return rte_eal_process_type() != RTE_PROC_PRIMARY;
}

/**
 * Get interface name from private structure.
 *
 * @param[in] priv
 *   Pointer to private structure.
 * @param[out] ifname
 *   Interface name output buffer.
 *
 * @return
 *   0 on success, -1 on failure and errno is set.
 */
int
priv_get_ifname(const struct priv *priv, char (*ifname)[IF_NAMESIZE])
{
        DIR *dir;
        struct dirent *dent;
        unsigned int dev_type = 0;
        unsigned int dev_port_prev = ~0u;
        char match[IF_NAMESIZE] = "";

        {
                MKSTR(path, "%s/device/net", priv->ctx->device->ibdev_path);

                dir = opendir(path);
                if (dir == NULL)
                        return -1;
        }
        while ((dent = readdir(dir)) != NULL) {
                char *name = dent->d_name;
                FILE *file;
                unsigned int dev_port;
                int r;

                if ((name[0] == '.') &&
                    ((name[1] == '\0') ||
                     ((name[1] == '.') && (name[2] == '\0'))))
                        continue;

                MKSTR(path, "%s/device/net/%s/%s",
                      priv->ctx->device->ibdev_path, name,
                      (dev_type ? "dev_id" : "dev_port"));

                file = fopen(path, "rb");
                if (file == NULL) {
                        if (errno != ENOENT)
                                continue;
                        /*
                         * Switch to dev_id when dev_port does not exist as
                         * is the case with Linux kernel versions < 3.15.
                         */
try_dev_id:
                        match[0] = '\0';
                        if (dev_type)
                                break;
                        dev_type = 1;
                        dev_port_prev = ~0u;
                        rewinddir(dir);
                        continue;
                }
                r = fscanf(file, (dev_type ? "%x" : "%u"), &dev_port);
                fclose(file);
                if (r != 1)
                        continue;
                /*
                 * Switch to dev_id when dev_port returns the same value for
                 * all ports. May happen when using a MOFED release older than
                 * 3.0 with a Linux kernel >= 3.15.
                 */
                if (dev_port == dev_port_prev)
                        goto try_dev_id;
                dev_port_prev = dev_port;
                if (dev_port == (priv->port - 1u))
                        snprintf(match, sizeof(match), "%s", name);
        }
        closedir(dir);
        if (match[0] == '\0')
                return -1;
        strncpy(*ifname, match, sizeof(*ifname));
        return 0;
}

/**
 * Read from sysfs entry.
 *
 * @param[in] priv
 *   Pointer to private structure.
 * @param[in] entry
 *   Entry name relative to sysfs path.
 * @param[out] buf
 *   Data output buffer.
 * @param size
 *   Buffer size.
 *
 * @return
 *   0 on success, -1 on failure and errno is set.
 */
static int
priv_sysfs_read(const struct priv *priv, const char *entry,
                char *buf, size_t size)
{
        char ifname[IF_NAMESIZE];
        FILE *file;
        int ret;
        int err;

        if (priv_get_ifname(priv, &ifname))
                return -1;

        MKSTR(path, "%s/device/net/%s/%s", priv->ctx->device->ibdev_path,
              ifname, entry);

        file = fopen(path, "rb");
        if (file == NULL)
                return -1;
        ret = fread(buf, 1, size, file);
        err = errno;
        if (((size_t)ret < size) && (ferror(file)))
                ret = -1;
        else
                ret = size;
        fclose(file);
        errno = err;
        return ret;
}

/**
 * Write to sysfs entry.
 *
 * @param[in] priv
 *   Pointer to private structure.
 * @param[in] entry
 *   Entry name relative to sysfs path.
 * @param[in] buf
 *   Data buffer.
 * @param size
 *   Buffer size.
 *
 * @return
 *   0 on success, -1 on failure and errno is set.
 */
static int
priv_sysfs_write(const struct priv *priv, const char *entry,
                 char *buf, size_t size)
{
        char ifname[IF_NAMESIZE];
        FILE *file;
        int ret;
        int err;

        if (priv_get_ifname(priv, &ifname))
                return -1;

        MKSTR(path, "%s/device/net/%s/%s", priv->ctx->device->ibdev_path,
              ifname, entry);

        file = fopen(path, "wb");
        if (file == NULL)
                return -1;
        ret = fwrite(buf, 1, size, file);
        err = errno;
        if (((size_t)ret < size) || (ferror(file)))
                ret = -1;
        else
                ret = size;
        fclose(file);
        errno = err;
        return ret;
}

/**
 * Get unsigned long sysfs property.
 *
 * @param priv
 *   Pointer to private structure.
 * @param[in] name
 *   Entry name relative to sysfs path.
 * @param[out] value
 *   Value output buffer.
 *
 * @return
 *   0 on success, -1 on failure and errno is set.
 */
static int
priv_get_sysfs_ulong(struct priv *priv, const char *name, unsigned long *value)
{
        int ret;
        unsigned long value_ret;
        char value_str[32];

        ret = priv_sysfs_read(priv, name, value_str, (sizeof(value_str) - 1));
        if (ret == -1) {
                DEBUG("cannot read %s value from sysfs: %s",
                      name, strerror(errno));
                return -1;
        }
        value_str[ret] = '\0';
        errno = 0;
        value_ret = strtoul(value_str, NULL, 0);
        if (errno) {
                DEBUG("invalid %s value `%s': %s", name, value_str,
                      strerror(errno));
                return -1;
        }
        *value = value_ret;
        return 0;
}

/**
 * Set unsigned long sysfs property.
 *
 * @param priv
 *   Pointer to private structure.
 * @param[in] name
 *   Entry name relative to sysfs path.
 * @param value
 *   Value to set.
 *
 * @return
 *   0 on success, -1 on failure and errno is set.
 */
static int
priv_set_sysfs_ulong(struct priv *priv, const char *name, unsigned long value)
{
        int ret;
        MKSTR(value_str, "%lu", value);

        ret = priv_sysfs_write(priv, name, value_str, (sizeof(value_str) - 1));
        if (ret == -1) {
                DEBUG("cannot write %s `%s' (%lu) to sysfs: %s",
                      name, value_str, value, strerror(errno));
                return -1;
        }
        return 0;
}

/**
 * Perform ifreq ioctl() on associated Ethernet device.
 *
 * @param[in] priv
 *   Pointer to private structure.
 * @param req
 *   Request number to pass to ioctl().
 * @param[out] ifr
 *   Interface request structure output buffer.
 *
 * @return
 *   0 on success, -1 on failure and errno is set.
 */
int
priv_ifreq(const struct priv *priv, int req, struct ifreq *ifr)
{
        int sock = socket(PF_INET, SOCK_DGRAM, IPPROTO_IP);
        int ret = -1;

        if (sock == -1)
                return ret;
        if (priv_get_ifname(priv, &ifr->ifr_name) == 0)
                ret = ioctl(sock, req, ifr);
        close(sock);
        return ret;
}

/**
 * Return the number of active VFs for the current device.
 *
 * @param[in] priv
 *   Pointer to private structure.
 * @param[out] num_vfs
 *   Number of active VFs.
 *
 * @return
 *   0 on success, -1 on failure and errno is set.
 */
int
priv_get_num_vfs(struct priv *priv, uint16_t *num_vfs)
{
        /* The sysfs entry name depends on the operating system. */
        const char **name = (const char *[]){
                "device/sriov_numvfs",
                "device/mlx5_num_vfs",
                NULL,
        };
        int ret;

        do {
                unsigned long ulong_num_vfs;

                ret = priv_get_sysfs_ulong(priv, *name, &ulong_num_vfs);
                if (!ret)
                        *num_vfs = ulong_num_vfs;
        } while (*(++name) && ret);
        return ret;
}

/**
 * Get device MTU.
 *
 * @param priv
 *   Pointer to private structure.
 * @param[out] mtu
 *   MTU value output buffer.
 *
 * @return
 *   0 on success, -1 on failure and errno is set.
 */
int
priv_get_mtu(struct priv *priv, uint16_t *mtu)
{
        unsigned long ulong_mtu;

        if (priv_get_sysfs_ulong(priv, "mtu", &ulong_mtu) == -1)
                return -1;
        *mtu = ulong_mtu;
        return 0;
}

/**
 * Set device MTU.
 *
 * @param priv
 *   Pointer to private structure.
 * @param mtu
 *   MTU value to set.
 *
 * @return
 *   0 on success, -1 on failure and errno is set.
 */
static int
priv_set_mtu(struct priv *priv, uint16_t mtu)
{
        uint16_t new_mtu;

        if (priv_set_sysfs_ulong(priv, "mtu", mtu) ||
            priv_get_mtu(priv, &new_mtu))
                return -1;
        if (new_mtu == mtu)
                return 0;
        errno = EINVAL;
        return -1;
}

/**
 * Set device flags.
 *
 * @param priv
 *   Pointer to private structure.
 * @param keep
 *   Bitmask for flags that must remain untouched.
 * @param flags
 *   Bitmask for flags to modify.
 *
 * @return
 *   0 on success, -1 on failure and errno is set.
 */
int
priv_set_flags(struct priv *priv, unsigned int keep, unsigned int flags)
{
        unsigned long tmp;

        if (priv_get_sysfs_ulong(priv, "flags", &tmp) == -1)
                return -1;
        tmp &= keep;
        tmp |= (flags & (~keep));
        return priv_set_sysfs_ulong(priv, "flags", tmp);
}

/**
 * Ethernet device configuration.
 *
 * Prepare the driver for a given number of TX and RX queues.
 *
 * @param dev
 *   Pointer to Ethernet device structure.
 *
 * @return
 *   0 on success, errno value on failure.
 */
static int
dev_configure(struct rte_eth_dev *dev)
{
        struct priv *priv = dev->data->dev_private;
        unsigned int rxqs_n = dev->data->nb_rx_queues;
        unsigned int txqs_n = dev->data->nb_tx_queues;
        unsigned int i;
        unsigned int j;
        unsigned int reta_idx_n;

        priv->rss_hf = dev->data->dev_conf.rx_adv_conf.rss_conf.rss_hf;
        priv->rxqs = (void *)dev->data->rx_queues;
        priv->txqs = (void *)dev->data->tx_queues;
        if (txqs_n != priv->txqs_n) {
                INFO("%p: TX queues number update: %u -> %u",
                     (void *)dev, priv->txqs_n, txqs_n);
                priv->txqs_n = txqs_n;
        }
        if (rxqs_n > priv->ind_table_max_size) {
                ERROR("cannot handle this many RX queues (%u)", rxqs_n);
                return EINVAL;
        }
        if (rxqs_n == priv->rxqs_n)
                return 0;
        INFO("%p: RX queues number update: %u -> %u",
             (void *)dev, priv->rxqs_n, rxqs_n);
        priv->rxqs_n = rxqs_n;
        /* If the requested number of RX queues is not a power of two, use the
         * maximum indirection table size for better balancing.
         * The result is always rounded to the next power of two. */
        reta_idx_n = (1 << log2above((rxqs_n & (rxqs_n - 1)) ?
                                     priv->ind_table_max_size :
                                     rxqs_n));
        if (priv_rss_reta_index_resize(priv, reta_idx_n))
                return ENOMEM;
        /* When the number of RX queues is not a power of two, the remaining
         * table entries are padded with reused WQs and hashes are not spread
         * uniformly. */
        for (i = 0, j = 0; (i != reta_idx_n); ++i) {
                (*priv->reta_idx)[i] = j;
                if (++j == rxqs_n)
                        j = 0;
        }
        return 0;
}

/**
 * DPDK callback for Ethernet device configuration.
 *
 * @param dev
 *   Pointer to Ethernet device structure.
 *
 * @return
 *   0 on success, negative errno value on failure.
 */
int
mlx5_dev_configure(struct rte_eth_dev *dev)
{
        struct priv *priv = dev->data->dev_private;
        int ret;

        if (mlx5_is_secondary())
                return -E_RTE_SECONDARY;

        priv_lock(priv);
        ret = dev_configure(dev);
        assert(ret >= 0);
        priv_unlock(priv);
        return -ret;
}

/**
 * DPDK callback to get information about the device.
 *
 * @param dev
 *   Pointer to Ethernet device structure.
 * @param[out] info
 *   Info structure output buffer.
 */
void
mlx5_dev_infos_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *info)
{
        struct priv *priv = mlx5_get_priv(dev);
        unsigned int max;
        char ifname[IF_NAMESIZE];

        priv_lock(priv);
        /* FIXME: we should ask the device for these values. */
        info->min_rx_bufsize = 32;
        info->max_rx_pktlen = 65536;
        /*
         * Since we need one CQ per QP, the limit is the minimum number
         * between the two values.
         */
        max = ((priv->device_attr.max_cq > priv->device_attr.max_qp) ?
               priv->device_attr.max_qp : priv->device_attr.max_cq);
        /* If max >= 65535 then max = 0, max_rx_queues is uint16_t. */
        if (max >= 65535)
                max = 65535;
        info->max_rx_queues = max;
        info->max_tx_queues = max;
        info->max_mac_addrs = RTE_DIM(priv->mac);
        info->rx_offload_capa =
                (priv->hw_csum ?
                 (DEV_RX_OFFLOAD_IPV4_CKSUM |
                  DEV_RX_OFFLOAD_UDP_CKSUM |
                  DEV_RX_OFFLOAD_TCP_CKSUM) :
                 0) |
                (priv->hw_vlan_strip ? DEV_RX_OFFLOAD_VLAN_STRIP : 0);
        if (!priv->mps)
                info->tx_offload_capa = DEV_TX_OFFLOAD_VLAN_INSERT;
        if (priv->hw_csum)
                info->tx_offload_capa |=
                        (DEV_TX_OFFLOAD_IPV4_CKSUM |
                         DEV_TX_OFFLOAD_UDP_CKSUM |
                         DEV_TX_OFFLOAD_TCP_CKSUM);
        if (priv_get_ifname(priv, &ifname) == 0)
                info->if_index = if_nametoindex(ifname);
        /* FIXME: RETA update/query API expects the callee to know the size of
         * the indirection table, for this PMD the size varies depending on
         * the number of RX queues, it becomes impossible to find the correct
         * size if it is not fixed.
         * The API should be updated to solve this problem. */
        info->reta_size = priv->ind_table_max_size;
        info->hash_key_size = ((*priv->rss_conf) ?
                               (*priv->rss_conf)[0]->rss_key_len :
                               0);
        info->speed_capa = priv->link_speed_capa;
        priv_unlock(priv);
}

const uint32_t *
mlx5_dev_supported_ptypes_get(struct rte_eth_dev *dev)
{
        static const uint32_t ptypes[] = {
                /* refers to rxq_cq_to_pkt_type() */
                RTE_PTYPE_L3_IPV4,
                RTE_PTYPE_L3_IPV6,
                RTE_PTYPE_INNER_L3_IPV4,
                RTE_PTYPE_INNER_L3_IPV6,
                RTE_PTYPE_UNKNOWN

        };

        if (dev->rx_pkt_burst == mlx5_rx_burst)
                return ptypes;
        return NULL;
}

/**
 * Retrieve physical link information (unlocked version using legacy ioctl).
 *
 * @param dev
 *   Pointer to Ethernet device structure.
 * @param wait_to_complete
 *   Wait for request completion (ignored).
 */
static int
mlx5_link_update_unlocked_gset(struct rte_eth_dev *dev, int wait_to_complete)
{
        struct priv *priv = mlx5_get_priv(dev);
        struct ethtool_cmd edata = {
                .cmd = ETHTOOL_GSET /* Deprecated since Linux v4.5. */
        };
        struct ifreq ifr;
        struct rte_eth_link dev_link;
        int link_speed = 0;

        (void)wait_to_complete;
        if (priv_ifreq(priv, SIOCGIFFLAGS, &ifr)) {
                WARN("ioctl(SIOCGIFFLAGS) failed: %s", strerror(errno));
                return -1;
        }
        memset(&dev_link, 0, sizeof(dev_link));
        dev_link.link_status = ((ifr.ifr_flags & IFF_UP) &&
                                (ifr.ifr_flags & IFF_RUNNING));
        ifr.ifr_data = (void *)&edata;
        if (priv_ifreq(priv, SIOCETHTOOL, &ifr)) {
                WARN("ioctl(SIOCETHTOOL, ETHTOOL_GSET) failed: %s",
                     strerror(errno));
                return -1;
        }
        link_speed = ethtool_cmd_speed(&edata);
        if (link_speed == -1)
                dev_link.link_speed = 0;
        else
                dev_link.link_speed = link_speed;
        priv->link_speed_capa = 0;
        if (edata.supported & SUPPORTED_Autoneg)
                priv->link_speed_capa |= ETH_LINK_SPEED_AUTONEG;
        if (edata.supported & (SUPPORTED_1000baseT_Full |
                               SUPPORTED_1000baseKX_Full))
                priv->link_speed_capa |= ETH_LINK_SPEED_1G;
        if (edata.supported & SUPPORTED_10000baseKR_Full)
                priv->link_speed_capa |= ETH_LINK_SPEED_10G;
        if (edata.supported & (SUPPORTED_40000baseKR4_Full |
                               SUPPORTED_40000baseCR4_Full |
                               SUPPORTED_40000baseSR4_Full |
                               SUPPORTED_40000baseLR4_Full))
                priv->link_speed_capa |= ETH_LINK_SPEED_40G;
        dev_link.link_duplex = ((edata.duplex == DUPLEX_HALF) ?
                                ETH_LINK_HALF_DUPLEX : ETH_LINK_FULL_DUPLEX);
        dev_link.link_autoneg = !(dev->data->dev_conf.link_speeds &
                        ETH_LINK_SPEED_FIXED);
        if (memcmp(&dev_link, &dev->data->dev_link, sizeof(dev_link))) {
                /* Link status changed. */
                dev->data->dev_link = dev_link;
                return 0;
        }
        /* Link status is still the same. */
        return -1;
}

/**
 * Retrieve physical link information (unlocked version using new ioctl from
 * Linux 4.5).
 *
 * @param dev
 *   Pointer to Ethernet device structure.
 * @param wait_to_complete
 *   Wait for request completion (ignored).
 */
static int
mlx5_link_update_unlocked_gs(struct rte_eth_dev *dev, int wait_to_complete)
{
#ifdef ETHTOOL_GLINKSETTINGS
        struct priv *priv = mlx5_get_priv(dev);
        struct ethtool_link_settings edata = {
                .cmd = ETHTOOL_GLINKSETTINGS,
        };
        struct ifreq ifr;
        struct rte_eth_link dev_link;
        uint64_t sc;

        (void)wait_to_complete;
        if (priv_ifreq(priv, SIOCGIFFLAGS, &ifr)) {
                WARN("ioctl(SIOCGIFFLAGS) failed: %s", strerror(errno));
                return -1;
        }
        memset(&dev_link, 0, sizeof(dev_link));
        dev_link.link_status = ((ifr.ifr_flags & IFF_UP) &&
                                (ifr.ifr_flags & IFF_RUNNING));
        ifr.ifr_data = (void *)&edata;
        if (priv_ifreq(priv, SIOCETHTOOL, &ifr)) {
                DEBUG("ioctl(SIOCETHTOOL, ETHTOOL_GLINKSETTINGS) failed: %s",
                      strerror(errno));
                return -1;
        }
        dev_link.link_speed = edata.speed;
        sc = edata.link_mode_masks[0] |
                ((uint64_t)edata.link_mode_masks[1] << 32);
        priv->link_speed_capa = 0;
        /* Link speeds available in kernel v4.5. */
        if (sc & ETHTOOL_LINK_MODE_Autoneg_BIT)
                priv->link_speed_capa |= ETH_LINK_SPEED_AUTONEG;
        if (sc & (ETHTOOL_LINK_MODE_1000baseT_Full_BIT |
                  ETHTOOL_LINK_MODE_1000baseKX_Full_BIT))
                priv->link_speed_capa |= ETH_LINK_SPEED_1G;
        if (sc & (ETHTOOL_LINK_MODE_10000baseKX4_Full_BIT |
                  ETHTOOL_LINK_MODE_10000baseKR_Full_BIT |
                  ETHTOOL_LINK_MODE_10000baseR_FEC_BIT))
                priv->link_speed_capa |= ETH_LINK_SPEED_10G;
        if (sc & (ETHTOOL_LINK_MODE_20000baseMLD2_Full_BIT |
                  ETHTOOL_LINK_MODE_20000baseKR2_Full_BIT))
                priv->link_speed_capa |= ETH_LINK_SPEED_20G;
        if (sc & (ETHTOOL_LINK_MODE_40000baseKR4_Full_BIT |
                  ETHTOOL_LINK_MODE_40000baseCR4_Full_BIT |
                  ETHTOOL_LINK_MODE_40000baseSR4_Full_BIT |
                  ETHTOOL_LINK_MODE_40000baseLR4_Full_BIT))
                priv->link_speed_capa |= ETH_LINK_SPEED_40G;
        if (sc & (ETHTOOL_LINK_MODE_56000baseKR4_Full_BIT |
                  ETHTOOL_LINK_MODE_56000baseCR4_Full_BIT |
                  ETHTOOL_LINK_MODE_56000baseSR4_Full_BIT |
                  ETHTOOL_LINK_MODE_56000baseLR4_Full_BIT))
                priv->link_speed_capa |= ETH_LINK_SPEED_56G;
        /* Link speeds available in kernel v4.6. */
#ifdef HAVE_ETHTOOL_LINK_MODE_25G
        if (sc & (ETHTOOL_LINK_MODE_25000baseCR_Full_BIT |
                  ETHTOOL_LINK_MODE_25000baseKR_Full_BIT |
                  ETHTOOL_LINK_MODE_25000baseSR_Full_BIT))
                priv->link_speed_capa |= ETH_LINK_SPEED_25G;
#endif
#ifdef HAVE_ETHTOOL_LINK_MODE_50G
        if (sc & (ETHTOOL_LINK_MODE_50000baseCR2_Full_BIT |
                  ETHTOOL_LINK_MODE_50000baseKR2_Full_BIT))
                priv->link_speed_capa |= ETH_LINK_SPEED_50G;
#endif
#ifdef HAVE_ETHTOOL_LINK_MODE_100G
        if (sc & (ETHTOOL_LINK_MODE_100000baseKR4_Full_BIT |
                  ETHTOOL_LINK_MODE_100000baseSR4_Full_BIT |
                  ETHTOOL_LINK_MODE_100000baseCR4_Full_BIT |
                  ETHTOOL_LINK_MODE_100000baseLR4_ER4_Full_BIT))
                priv->link_speed_capa |= ETH_LINK_SPEED_100G;
#endif
        dev_link.link_duplex = ((edata.duplex == DUPLEX_HALF) ?
                                ETH_LINK_HALF_DUPLEX : ETH_LINK_FULL_DUPLEX);
        dev_link.link_autoneg = !(dev->data->dev_conf.link_speeds &
                                  ETH_LINK_SPEED_FIXED);
        if (memcmp(&dev_link, &dev->data->dev_link, sizeof(dev_link))) {
                /* Link status changed. */
                dev->data->dev_link = dev_link;
                return 0;
        }
#else
        (void)dev;
        (void)wait_to_complete;
#endif
        /* Link status is still the same. */
        return -1;
}

/**
 * DPDK callback to retrieve physical link information (unlocked version).
 *
 * @param dev
 *   Pointer to Ethernet device structure.
 * @param wait_to_complete
 *   Wait for request completion (ignored).
 */
int
mlx5_link_update_unlocked(struct rte_eth_dev *dev, int wait_to_complete)
{
        int ret;

        ret = mlx5_link_update_unlocked_gs(dev, wait_to_complete);
        if (ret < 0)
                ret = mlx5_link_update_unlocked_gset(dev, wait_to_complete);
        return ret;
}

/**
 * DPDK callback to retrieve physical link information.
 *
 * @param dev
 *   Pointer to Ethernet device structure.
 * @param wait_to_complete
 *   Wait for request completion (ignored).
 */
int
mlx5_link_update(struct rte_eth_dev *dev, int wait_to_complete)
{
        struct priv *priv = mlx5_get_priv(dev);
        int ret;

        priv_lock(priv);
        ret = mlx5_link_update_unlocked(dev, wait_to_complete);
        priv_unlock(priv);
        return ret;
}

/**
 * DPDK callback to change the MTU.
 *
 * Setting the MTU affects hardware MRU (packets larger than the MTU cannot be
 * received). Use this as a hint to enable/disable scattered packets support
 * and improve performance when not needed.
 * Since failure is not an option, reconfiguring queues on the fly is not
 * recommended.
 *
 * @param dev
 *   Pointer to Ethernet device structure.
 * @param in_mtu
 *   New MTU.
 *
 * @return
 *   0 on success, negative errno value on failure.
 */
int
mlx5_dev_set_mtu(struct rte_eth_dev *dev, uint16_t mtu)
{
        struct priv *priv = dev->data->dev_private;
        int ret = 0;
        unsigned int i;
        uint16_t (*rx_func)(void *, struct rte_mbuf **, uint16_t) =
                mlx5_rx_burst;
        unsigned int max_frame_len;
        int rehash;
        int restart = priv->started;

        if (mlx5_is_secondary())
                return -E_RTE_SECONDARY;

        priv_lock(priv);
        /* Set kernel interface MTU first. */
        if (priv_set_mtu(priv, mtu)) {
                ret = errno;
                WARN("cannot set port %u MTU to %u: %s", priv->port, mtu,
                     strerror(ret));
                goto out;
        } else
                DEBUG("adapter port %u MTU set to %u", priv->port, mtu);
        /* Temporarily replace RX handler with a fake one, assuming it has not
         * been copied elsewhere. */
        dev->rx_pkt_burst = removed_rx_burst;
        /* Make sure everyone has left mlx5_rx_burst() and uses
         * removed_rx_burst() instead. */
        rte_wmb();
        usleep(1000);
        /* MTU does not include header and CRC. */
        max_frame_len = ETHER_HDR_LEN + mtu + ETHER_CRC_LEN;
        /* Check if at least one queue is going to need a SGE update. */
        for (i = 0; i != priv->rxqs_n; ++i) {
                struct rxq *rxq = (*priv->rxqs)[i];
                unsigned int mb_len;
                unsigned int size = RTE_PKTMBUF_HEADROOM + max_frame_len;
                unsigned int sges_n;

                if (rxq == NULL)
                        continue;
                mb_len = rte_pktmbuf_data_room_size(rxq->mp);
                assert(mb_len >= RTE_PKTMBUF_HEADROOM);
                /*
                 * Determine the number of SGEs needed for a full packet
                 * and round it to the next power of two.
                 */
                sges_n = log2above((size / mb_len) + !!(size % mb_len));
                if (sges_n != rxq->sges_n)
                        break;
        }
        /*
         * If all queues have the right number of SGEs, a simple rehash
         * of their buffers is enough, otherwise SGE information can only
         * be updated in a queue by recreating it. All resources that depend
         * on queues (flows, indirection tables) must be recreated as well in
         * that case.
         */
        rehash = (i == priv->rxqs_n);
        if (!rehash) {
                /* Clean up everything as with mlx5_dev_stop(). */
                priv_special_flow_disable_all(priv);
                priv_mac_addrs_disable(priv);
                priv_destroy_hash_rxqs(priv);
                priv_fdir_disable(priv);
                priv_dev_interrupt_handler_uninstall(priv, dev);
        }
recover:
        /* Reconfigure each RX queue. */
        for (i = 0; (i != priv->rxqs_n); ++i) {
                struct rxq *rxq = (*priv->rxqs)[i];
                struct rxq_ctrl *rxq_ctrl =
                        container_of(rxq, struct rxq_ctrl, rxq);
                int sp;
                unsigned int mb_len;
                unsigned int tmp;

                if (rxq == NULL)
                        continue;
                mb_len = rte_pktmbuf_data_room_size(rxq->mp);
                assert(mb_len >= RTE_PKTMBUF_HEADROOM);
                /* Toggle scattered support (sp) if necessary. */
                sp = (max_frame_len > (mb_len - RTE_PKTMBUF_HEADROOM));
                /* Provide new values to rxq_setup(). */
                dev->data->dev_conf.rxmode.jumbo_frame = sp;
                dev->data->dev_conf.rxmode.max_rx_pkt_len = max_frame_len;
                if (rehash)
                        ret = rxq_rehash(dev, rxq_ctrl);
                else
                        ret = rxq_ctrl_setup(dev, rxq_ctrl, 1 << rxq->elts_n,
                                             rxq_ctrl->socket, NULL, rxq->mp);
                if (!ret)
                        continue;
                /* Attempt to roll back in case of error. */
                tmp = (mb_len << rxq->sges_n) - RTE_PKTMBUF_HEADROOM;
                if (max_frame_len != tmp) {
                        max_frame_len = tmp;
                        goto recover;
                }
                /* Double fault, disable RX. */
                break;
        }
        /*
         * Use a safe RX burst function in case of error, otherwise mimic
         * mlx5_dev_start().
         */
        if (ret) {
                ERROR("unable to reconfigure RX queues, RX disabled");
                rx_func = removed_rx_burst;
        } else if (restart &&
                 !rehash &&
                 !priv_create_hash_rxqs(priv) &&
                 !priv_rehash_flows(priv)) {
                if (dev->data->dev_conf.fdir_conf.mode == RTE_FDIR_MODE_NONE)
                        priv_fdir_enable(priv);
                priv_dev_interrupt_handler_install(priv, dev);
        }
        priv->mtu = mtu;
        /* Burst functions can now be called again. */
        rte_wmb();
        dev->rx_pkt_burst = rx_func;
out:
        priv_unlock(priv);
        assert(ret >= 0);
        return -ret;
}

/**
 * DPDK callback to get flow control status.
 *
 * @param dev
 *   Pointer to Ethernet device structure.
 * @param[out] fc_conf
 *   Flow control output buffer.
 *
 * @return
 *   0 on success, negative errno value on failure.
 */
int
mlx5_dev_get_flow_ctrl(struct rte_eth_dev *dev, struct rte_eth_fc_conf *fc_conf)
{
        struct priv *priv = dev->data->dev_private;
        struct ifreq ifr;
        struct ethtool_pauseparam ethpause = {
                .cmd = ETHTOOL_GPAUSEPARAM
        };
        int ret;

        if (mlx5_is_secondary())
                return -E_RTE_SECONDARY;

        ifr.ifr_data = (void *)&ethpause;
        priv_lock(priv);
        if (priv_ifreq(priv, SIOCETHTOOL, &ifr)) {
                ret = errno;
                WARN("ioctl(SIOCETHTOOL, ETHTOOL_GPAUSEPARAM)"
                     " failed: %s",
                     strerror(ret));
                goto out;
        }

        fc_conf->autoneg = ethpause.autoneg;
        if (ethpause.rx_pause && ethpause.tx_pause)
                fc_conf->mode = RTE_FC_FULL;
        else if (ethpause.rx_pause)
                fc_conf->mode = RTE_FC_RX_PAUSE;
        else if (ethpause.tx_pause)
                fc_conf->mode = RTE_FC_TX_PAUSE;
        else
                fc_conf->mode = RTE_FC_NONE;
        ret = 0;

out:
        priv_unlock(priv);
        assert(ret >= 0);
        return -ret;
}

/**
 * DPDK callback to modify flow control parameters.
 *
 * @param dev
 *   Pointer to Ethernet device structure.
 * @param[in] fc_conf
 *   Flow control parameters.
 *
 * @return
 *   0 on success, negative errno value on failure.
 */
int
mlx5_dev_set_flow_ctrl(struct rte_eth_dev *dev, struct rte_eth_fc_conf *fc_conf)
{
        struct priv *priv = dev->data->dev_private;
        struct ifreq ifr;
        struct ethtool_pauseparam ethpause = {
                .cmd = ETHTOOL_SPAUSEPARAM
        };
        int ret;

        if (mlx5_is_secondary())
                return -E_RTE_SECONDARY;

        ifr.ifr_data = (void *)&ethpause;
        ethpause.autoneg = fc_conf->autoneg;
        if (((fc_conf->mode & RTE_FC_FULL) == RTE_FC_FULL) ||
            (fc_conf->mode & RTE_FC_RX_PAUSE))
                ethpause.rx_pause = 1;
        else
                ethpause.rx_pause = 0;

        if (((fc_conf->mode & RTE_FC_FULL) == RTE_FC_FULL) ||
            (fc_conf->mode & RTE_FC_TX_PAUSE))
                ethpause.tx_pause = 1;
        else
                ethpause.tx_pause = 0;

        priv_lock(priv);
        if (priv_ifreq(priv, SIOCETHTOOL, &ifr)) {
                ret = errno;
                WARN("ioctl(SIOCETHTOOL, ETHTOOL_SPAUSEPARAM)"
                     " failed: %s",
                     strerror(ret));
                goto out;
        }
        ret = 0;

out:
        priv_unlock(priv);
        assert(ret >= 0);
        return -ret;
}

/**
 * Get PCI information from struct ibv_device.
 *
 * @param device
 *   Pointer to Ethernet device structure.
 * @param[out] pci_addr
 *   PCI bus address output buffer.
 *
 * @return
 *   0 on success, -1 on failure and errno is set.
 */
int
mlx5_ibv_device_to_pci_addr(const struct ibv_device *device,
                            struct rte_pci_addr *pci_addr)
{
        FILE *file;
        char line[32];
        MKSTR(path, "%s/device/uevent", device->ibdev_path);

        file = fopen(path, "rb");
        if (file == NULL)
                return -1;
        while (fgets(line, sizeof(line), file) == line) {
                size_t len = strlen(line);
                int ret;

                /* Truncate long lines. */
                if (len == (sizeof(line) - 1))
                        while (line[(len - 1)] != '\n') {
                                ret = fgetc(file);
                                if (ret == EOF)
                                        break;
                                line[(len - 1)] = ret;
                        }
                /* Extract information. */
                if (sscanf(line,
                           "PCI_SLOT_NAME="
                           "%" SCNx16 ":%" SCNx8 ":%" SCNx8 ".%" SCNx8 "\n",
                           &pci_addr->domain,
                           &pci_addr->bus,
                           &pci_addr->devid,
                           &pci_addr->function) == 4) {
                        ret = 0;
                        break;
                }
        }
        fclose(file);
        return 0;
}

/**
 * Link status handler.
 *
 * @param priv
 *   Pointer to private structure.
 * @param dev
 *   Pointer to the rte_eth_dev structure.
 *
 * @return
 *   Nonzero if the callback process can be called immediately.
 */
static int
priv_dev_link_status_handler(struct priv *priv, struct rte_eth_dev *dev)
{
        struct ibv_async_event event;
        int port_change = 0;
        int ret = 0;

        /* Read all message and acknowledge them. */
        for (;;) {
                if (ibv_get_async_event(priv->ctx, &event))
                        break;

                if (event.event_type == IBV_EVENT_PORT_ACTIVE ||
                    event.event_type == IBV_EVENT_PORT_ERR)
                        port_change = 1;
                else
                        DEBUG("event type %d on port %d not handled",
                              event.event_type, event.element.port_num);
                ibv_ack_async_event(&event);
        }

        if (port_change ^ priv->pending_alarm) {
                struct rte_eth_link *link = &dev->data->dev_link;

                priv->pending_alarm = 0;
                mlx5_link_update_unlocked(dev, 0);
                if (((link->link_speed == 0) && link->link_status) ||
                    ((link->link_speed != 0) && !link->link_status)) {
                        /* Inconsistent status, check again later. */
                        priv->pending_alarm = 1;
                        rte_eal_alarm_set(MLX5_ALARM_TIMEOUT_US,
                                          mlx5_dev_link_status_handler,
                                          dev);
                } else
                        ret = 1;
        }
        return ret;
}

/**
 * Handle delayed link status event.
 *
 * @param arg
 *   Registered argument.
 */
void
mlx5_dev_link_status_handler(void *arg)
{
        struct rte_eth_dev *dev = arg;
        struct priv *priv = dev->data->dev_private;
        int ret;

        priv_lock(priv);
        assert(priv->pending_alarm == 1);
        ret = priv_dev_link_status_handler(priv, dev);
        priv_unlock(priv);
        if (ret)
                _rte_eth_dev_callback_process(dev, RTE_ETH_EVENT_INTR_LSC, NULL);
}

/**
 * Handle interrupts from the NIC.
 *
 * @param[in] intr_handle
 *   Interrupt handler.
 * @param cb_arg
 *   Callback argument.
 */
void
mlx5_dev_interrupt_handler(struct rte_intr_handle *intr_handle, void *cb_arg)
{
        struct rte_eth_dev *dev = cb_arg;
        struct priv *priv = dev->data->dev_private;
        int ret;

        (void)intr_handle;
        priv_lock(priv);
        ret = priv_dev_link_status_handler(priv, dev);
        priv_unlock(priv);
        if (ret)
                _rte_eth_dev_callback_process(dev, RTE_ETH_EVENT_INTR_LSC, NULL);
}

/**
 * Uninstall interrupt handler.
 *
 * @param priv
 *   Pointer to private structure.
 * @param dev
 *   Pointer to the rte_eth_dev structure.
 */
void
priv_dev_interrupt_handler_uninstall(struct priv *priv, struct rte_eth_dev *dev)
{
        if (!dev->data->dev_conf.intr_conf.lsc)
                return;
        rte_intr_callback_unregister(&priv->intr_handle,
                                     mlx5_dev_interrupt_handler,
                                     dev);
        if (priv->pending_alarm)
                rte_eal_alarm_cancel(mlx5_dev_link_status_handler, dev);
        priv->pending_alarm = 0;
        priv->intr_handle.fd = 0;
        priv->intr_handle.type = RTE_INTR_HANDLE_UNKNOWN;
}

/**
 * Install interrupt handler.
 *
 * @param priv
 *   Pointer to private structure.
 * @param dev
 *   Pointer to the rte_eth_dev structure.
 */
void
priv_dev_interrupt_handler_install(struct priv *priv, struct rte_eth_dev *dev)
{
        int rc, flags;

        if (!dev->data->dev_conf.intr_conf.lsc)
                return;
        assert(priv->ctx->async_fd > 0);
        flags = fcntl(priv->ctx->async_fd, F_GETFL);
        rc = fcntl(priv->ctx->async_fd, F_SETFL, flags | O_NONBLOCK);
        if (rc < 0) {
                INFO("failed to change file descriptor async event queue");
                dev->data->dev_conf.intr_conf.lsc = 0;
        } else {
                priv->intr_handle.fd = priv->ctx->async_fd;
                priv->intr_handle.type = RTE_INTR_HANDLE_EXT;
                rte_intr_callback_register(&priv->intr_handle,
                                           mlx5_dev_interrupt_handler,
                                           dev);
        }
}

/**
 * Change the link state (UP / DOWN).
 *
 * @param priv
 *   Pointer to Ethernet device structure.
 * @param up
 *   Nonzero for link up, otherwise link down.
 *
 * @return
 *   0 on success, errno value on failure.
 */
static int
priv_set_link(struct priv *priv, int up)
{
        struct rte_eth_dev *dev = priv->dev;
        int err;

        if (up) {
                err = priv_set_flags(priv, ~IFF_UP, IFF_UP);
                if (err)
                        return err;
                priv_select_tx_function(priv);
                priv_select_rx_function(priv);
        } else {
                err = priv_set_flags(priv, ~IFF_UP, ~IFF_UP);
                if (err)
                        return err;
                dev->rx_pkt_burst = removed_rx_burst;
                dev->tx_pkt_burst = removed_tx_burst;
        }
        return 0;
}

/**
 * DPDK callback to bring the link DOWN.
 *
 * @param dev
 *   Pointer to Ethernet device structure.
 *
 * @return
 *   0 on success, errno value on failure.
 */
int
mlx5_set_link_down(struct rte_eth_dev *dev)
{
        struct priv *priv = dev->data->dev_private;
        int err;

        priv_lock(priv);
        err = priv_set_link(priv, 0);
        priv_unlock(priv);
        return err;
}

/**
 * DPDK callback to bring the link UP.
 *
 * @param dev
 *   Pointer to Ethernet device structure.
 *
 * @return
 *   0 on success, errno value on failure.
 */
int
mlx5_set_link_up(struct rte_eth_dev *dev)
{
        struct priv *priv = dev->data->dev_private;
        int err;

        priv_lock(priv);
        err = priv_set_link(priv, 1);
        priv_unlock(priv);
        return err;
}

/**
 * Configure secondary process queues from a private data pointer (primary
 * or secondary) and update burst callbacks. Can take place only once.
 *
 * All queues must have been previously created by the primary process to
 * avoid undefined behavior.
 *
 * @param priv
 *   Private data pointer from either primary or secondary process.
 *
 * @return
 *   Private data pointer from secondary process, NULL in case of error.
 */
struct priv *
mlx5_secondary_data_setup(struct priv *priv)
{
        unsigned int port_id = 0;
        struct mlx5_secondary_data *sd;
        void **tx_queues;
        void **rx_queues;
        unsigned int nb_tx_queues;
        unsigned int nb_rx_queues;
        unsigned int i;

        /* priv must be valid at this point. */
        assert(priv != NULL);
        /* priv->dev must also be valid but may point to local memory from
         * another process, possibly with the same address and must not
         * be dereferenced yet. */
        assert(priv->dev != NULL);
        /* Determine port ID by finding out where priv comes from. */
        while (1) {
                sd = &mlx5_secondary_data[port_id];
                rte_spinlock_lock(&sd->lock);
                /* Primary process? */
                if (sd->primary_priv == priv)
                        break;
                /* Secondary process? */
                if (sd->data.dev_private == priv)
                        break;
                rte_spinlock_unlock(&sd->lock);
                if (++port_id == RTE_DIM(mlx5_secondary_data))
                        port_id = 0;
        }
        /* Switch to secondary private structure. If private data has already
         * been updated by another thread, there is nothing else to do. */
        priv = sd->data.dev_private;
        if (priv->dev->data == &sd->data)
                goto end;
        /* Sanity checks. Secondary private structure is supposed to point
         * to local eth_dev, itself still pointing to the shared device data
         * structure allocated by the primary process. */
        assert(sd->shared_dev_data != &sd->data);
        assert(sd->data.nb_tx_queues == 0);
        assert(sd->data.tx_queues == NULL);
        assert(sd->data.nb_rx_queues == 0);
        assert(sd->data.rx_queues == NULL);
        assert(priv != sd->primary_priv);
        assert(priv->dev->data == sd->shared_dev_data);
        assert(priv->txqs_n == 0);
        assert(priv->txqs == NULL);
        assert(priv->rxqs_n == 0);
        assert(priv->rxqs == NULL);
        nb_tx_queues = sd->shared_dev_data->nb_tx_queues;
        nb_rx_queues = sd->shared_dev_data->nb_rx_queues;
        /* Allocate local storage for queues. */
        tx_queues = rte_zmalloc("secondary ethdev->tx_queues",
                                sizeof(sd->data.tx_queues[0]) * nb_tx_queues,
                                RTE_CACHE_LINE_SIZE);
        rx_queues = rte_zmalloc("secondary ethdev->rx_queues",
                                sizeof(sd->data.rx_queues[0]) * nb_rx_queues,
                                RTE_CACHE_LINE_SIZE);
        if (tx_queues == NULL || rx_queues == NULL)
                goto error;
        /* Lock to prevent control operations during setup. */
        priv_lock(priv);
        /* TX queues. */
        for (i = 0; i != nb_tx_queues; ++i) {
                struct txq *primary_txq = (*sd->primary_priv->txqs)[i];
                struct txq_ctrl *primary_txq_ctrl;
                struct txq_ctrl *txq_ctrl;

                if (primary_txq == NULL)
                        continue;
                primary_txq_ctrl = container_of(primary_txq,
                                                struct txq_ctrl, txq);
                txq_ctrl = rte_calloc_socket("TXQ", 1, sizeof(*txq_ctrl) +
                                             (1 << primary_txq->elts_n) *
                                             sizeof(struct rte_mbuf *), 0,
                                             primary_txq_ctrl->socket);
                if (txq_ctrl != NULL) {
                        if (txq_ctrl_setup(priv->dev,
                                           txq_ctrl,
                                           1 << primary_txq->elts_n,
                                           primary_txq_ctrl->socket,
                                           NULL) == 0) {
                                txq_ctrl->txq.stats.idx =
                                        primary_txq->stats.idx;
                                tx_queues[i] = &txq_ctrl->txq;
                                continue;
                        }
                        rte_free(txq_ctrl);
                }
                while (i) {
                        txq_ctrl = tx_queues[--i];
                        txq_cleanup(txq_ctrl);
                        rte_free(txq_ctrl);
                }
                goto error;
        }
        /* RX queues. */
        for (i = 0; i != nb_rx_queues; ++i) {
                struct rxq_ctrl *primary_rxq =
                        container_of((*sd->primary_priv->rxqs)[i],
                                     struct rxq_ctrl, rxq);

                if (primary_rxq == NULL)
                        continue;
                /* Not supported yet. */
                rx_queues[i] = NULL;
        }
        /* Update everything. */
        priv->txqs = (void *)tx_queues;
        priv->txqs_n = nb_tx_queues;
        priv->rxqs = (void *)rx_queues;
        priv->rxqs_n = nb_rx_queues;
        sd->data.rx_queues = rx_queues;
        sd->data.tx_queues = tx_queues;
        sd->data.nb_rx_queues = nb_rx_queues;
        sd->data.nb_tx_queues = nb_tx_queues;
        sd->data.dev_link = sd->shared_dev_data->dev_link;
        sd->data.mtu = sd->shared_dev_data->mtu;
        memcpy(sd->data.rx_queue_state, sd->shared_dev_data->rx_queue_state,
               sizeof(sd->data.rx_queue_state));
        memcpy(sd->data.tx_queue_state, sd->shared_dev_data->tx_queue_state,
               sizeof(sd->data.tx_queue_state));
        sd->data.dev_flags = sd->shared_dev_data->dev_flags;
        /* Use local data from now on. */
        rte_mb();
        priv->dev->data = &sd->data;
        rte_mb();
        priv_select_tx_function(priv);
        priv_select_rx_function(priv);
        priv_unlock(priv);
end:
        /* More sanity checks. */
        assert(priv->dev->data == &sd->data);
        rte_spinlock_unlock(&sd->lock);
        return priv;
error:
        priv_unlock(priv);
        rte_free(tx_queues);
        rte_free(rx_queues);
        rte_spinlock_unlock(&sd->lock);
        return NULL;
}

/**
 * Configure the TX function to use.
 *
 * @param priv
 *   Pointer to private structure.
 */
void
priv_select_tx_function(struct priv *priv)
{
        priv->dev->tx_pkt_burst = mlx5_tx_burst;
        /* Display warning for unsupported configurations. */
        if (priv->sriov && priv->mps)
                WARN("multi-packet send WQE cannot be used on a SR-IOV setup");
        /* Select appropriate TX function. */
        if ((priv->sriov == 0) && priv->mps && priv->txq_inline) {
                priv->dev->tx_pkt_burst = mlx5_tx_burst_mpw_inline;
                DEBUG("selected MPW inline TX function");
        } else if ((priv->sriov == 0) && priv->mps) {
                priv->dev->tx_pkt_burst = mlx5_tx_burst_mpw;
                DEBUG("selected MPW TX function");
        }
}

/**
 * Configure the RX function to use.
 *
 * @param priv
 *   Pointer to private structure.
 */
void
priv_select_rx_function(struct priv *priv)
{
        priv->dev->rx_pkt_burst = mlx5_rx_burst;
}