[dpdk-dev] [PATCH v2 10/19] mlx4: move mlx4 PMD to drivers/net directory

Or Gerlitz gerlitz.or at gmail.com
Sat May 23 06:46:49 CEST 2015


On Fri, May 15, 2015 at 6:56 PM, Bruce Richardson
<bruce.richardson at intel.com> wrote:
> move mlx4 PMD to drivers/net directory
>
> Signed-off-by: Bruce Richardson <bruce.richardson at intel.com>
> ---
>  drivers/net/Makefile                         |    2 +-
>  drivers/net/mlx4/Makefile                    |  121 +
>  drivers/net/mlx4/mlx4.c                      | 4686 ++++++++++++++++++++++++++
>  drivers/net/mlx4/mlx4.h                      |  157 +
>  drivers/net/mlx4/rte_pmd_mlx4_version.map    |    4 +
>  lib/Makefile                                 |    1 -
>  lib/librte_pmd_mlx4/Makefile                 |  121 -
>  lib/librte_pmd_mlx4/mlx4.c                   | 4686 --------------------------
>  lib/librte_pmd_mlx4/mlx4.h                   |  157 -
>  lib/librte_pmd_mlx4/rte_pmd_mlx4_version.map |    4 -
>  10 files changed, 4969 insertions(+), 4970 deletions(-)
>  create mode 100644 drivers/net/mlx4/Makefile
>  create mode 100644 drivers/net/mlx4/mlx4.c
>  create mode 100644 drivers/net/mlx4/mlx4.h
>  create mode 100644 drivers/net/mlx4/rte_pmd_mlx4_version.map
>  delete mode 100644 lib/librte_pmd_mlx4/Makefile
>  delete mode 100644 lib/librte_pmd_mlx4/mlx4.c
>  delete mode 100644 lib/librte_pmd_mlx4/mlx4.h
>  delete mode 100644 lib/librte_pmd_mlx4/rte_pmd_mlx4_version.map

There's a way to do source movements with git such that history
remains, see for example in the upstream kernel the way the ethernet
drivers were moved from drivers/net to drivers/net/ethernet couple of
years ago.

Please make sure to use that practice here too.

Or.











> +#include <rte_dev.h>
> +#include <rte_mbuf.h>
> +#include <rte_errno.h>
> +#include <rte_mempool.h>
> +#include <rte_prefetch.h>
> +#include <rte_malloc.h>
> +#include <rte_spinlock.h>
> +#include <rte_atomic.h>
> +#include <rte_version.h>
> +#include <rte_log.h>
> +#ifdef PEDANTIC
> +#pragma GCC diagnostic error "-pedantic"
> +#endif
> +
> +/* Generated configuration header. */
> +#include "mlx4_autoconf.h"
> +
> +/* PMD header. */
> +#include "mlx4.h"
> +
> +/* Runtime logging through RTE_LOG() is enabled when not in debugging mode.
> + * Intermediate LOG_*() macros add the required end-of-line characters. */
> +#ifndef NDEBUG
> +#define INFO(...) DEBUG(__VA_ARGS__)
> +#define WARN(...) DEBUG(__VA_ARGS__)
> +#define ERROR(...) DEBUG(__VA_ARGS__)
> +#else
> +#define LOG__(level, m, ...) \
> +       RTE_LOG(level, PMD, MLX4_DRIVER_NAME ": " m "%c", __VA_ARGS__)
> +#define LOG_(level, ...) LOG__(level, __VA_ARGS__, '\n')
> +#define INFO(...) LOG_(INFO, __VA_ARGS__)
> +#define WARN(...) LOG_(WARNING, __VA_ARGS__)
> +#define ERROR(...) LOG_(ERR, __VA_ARGS__)
> +#endif
> +
> +/* Convenience macros for accessing mbuf fields. */
> +#define NEXT(m) ((m)->next)
> +#define DATA_LEN(m) ((m)->data_len)
> +#define PKT_LEN(m) ((m)->pkt_len)
> +#define DATA_OFF(m) ((m)->data_off)
> +#define SET_DATA_OFF(m, o) ((m)->data_off = (o))
> +#define NB_SEGS(m) ((m)->nb_segs)
> +#define PORT(m) ((m)->port)
> +
> +/* Work Request ID data type (64 bit). */
> +typedef union {
> +       struct {
> +               uint32_t id;
> +               uint16_t offset;
> +       } data;
> +       uint64_t raw;
> +} wr_id_t;
> +
> +#define WR_ID(o) (((wr_id_t *)&(o))->data)
> +
> +/* Compile-time check. */
> +static inline void wr_id_t_check(void)
> +{
> +       wr_id_t check[1 + (2 * -!(sizeof(wr_id_t) == sizeof(uint64_t)))];
> +
> +       (void)check;
> +       (void)wr_id_t_check;
> +}
> +
> +/* If raw send operations are available, use them since they are faster. */
> +#ifdef SEND_RAW_WR_SUPPORT
> +typedef struct ibv_send_wr_raw mlx4_send_wr_t;
> +#define mlx4_post_send ibv_post_send_raw
> +#else
> +typedef struct ibv_send_wr mlx4_send_wr_t;
> +#define mlx4_post_send ibv_post_send
> +#endif
> +
> +struct mlx4_rxq_stats {
> +       unsigned int idx; /**< Mapping index. */
> +#ifdef MLX4_PMD_SOFT_COUNTERS
> +       uint64_t ipackets;  /**< Total of successfully received packets. */
> +       uint64_t ibytes;    /**< Total of successfully received bytes. */
> +#endif
> +       uint64_t idropped;  /**< Total of packets dropped when RX ring full. */
> +       uint64_t rx_nombuf; /**< Total of RX mbuf allocation failures. */
> +};
> +
> +struct mlx4_txq_stats {
> +       unsigned int idx; /**< Mapping index. */
> +#ifdef MLX4_PMD_SOFT_COUNTERS
> +       uint64_t opackets; /**< Total of successfully sent packets. */
> +       uint64_t obytes;   /**< Total of successfully sent bytes. */
> +#endif
> +       uint64_t odropped; /**< Total of packets not sent when TX ring full. */
> +};
> +
> +/* RX element (scattered packets). */
> +struct rxq_elt_sp {
> +       struct ibv_recv_wr wr; /* Work Request. */
> +       struct ibv_sge sges[MLX4_PMD_SGE_WR_N]; /* Scatter/Gather Elements. */
> +       struct rte_mbuf *bufs[MLX4_PMD_SGE_WR_N]; /* SGEs buffers. */
> +};
> +
> +/* RX element. */
> +struct rxq_elt {
> +       struct ibv_recv_wr wr; /* Work Request. */
> +       struct ibv_sge sge; /* Scatter/Gather Element. */
> +       /* mbuf pointer is derived from WR_ID(wr.wr_id).offset. */
> +};
> +
> +/* RX queue descriptor. */
> +struct rxq {
> +       struct priv *priv; /* Back pointer to private data. */
> +       struct rte_mempool *mp; /* Memory Pool for allocations. */
> +       struct ibv_mr *mr; /* Memory Region (for mp). */
> +       struct ibv_cq *cq; /* Completion Queue. */
> +       struct ibv_qp *qp; /* Queue Pair. */
> +       /*
> +        * There is exactly one flow configured per MAC address. Each flow
> +        * may contain several specifications, one per configured VLAN ID.
> +        */
> +       BITFIELD_DECLARE(mac_configured, uint32_t, MLX4_MAX_MAC_ADDRESSES);
> +       struct ibv_exp_flow *mac_flow[MLX4_MAX_MAC_ADDRESSES];
> +       struct ibv_exp_flow *promisc_flow; /* Promiscuous flow. */
> +       struct ibv_exp_flow *allmulti_flow; /* Multicast flow. */
> +       unsigned int port_id; /* Port ID for incoming packets. */
> +       unsigned int elts_n; /* (*elts)[] length. */
> +       union {
> +               struct rxq_elt_sp (*sp)[]; /* Scattered RX elements. */
> +               struct rxq_elt (*no_sp)[]; /* RX elements. */
> +       } elts;
> +       unsigned int sp:1; /* Use scattered RX elements. */
> +       uint32_t mb_len; /* Length of a mp-issued mbuf. */
> +       struct mlx4_rxq_stats stats; /* RX queue counters. */
> +       unsigned int socket; /* CPU socket ID for allocations. */
> +};
> +
> +/* TX element. */
> +struct txq_elt {
> +       mlx4_send_wr_t wr; /* Work Request. */
> +       struct ibv_sge sges[MLX4_PMD_SGE_WR_N]; /* Scatter/Gather Elements. */
> +       /* mbuf pointer is derived from WR_ID(wr.wr_id).offset. */
> +};
> +
> +/* Linear buffer type. It is used when transmitting buffers with too many
> + * segments that do not fit the hardware queue (see max_send_sge).
> + * Extra segments are copied (linearized) in such buffers, replacing the
> + * last SGE during TX.
> + * The size is arbitrary but large enough to hold a jumbo frame with
> + * 8 segments considering mbuf.buf_len is about 2048 bytes. */
> +typedef uint8_t linear_t[16384];
> +
> +/* TX queue descriptor. */
> +struct txq {
> +       struct priv *priv; /* Back pointer to private data. */
> +       struct {
> +               struct rte_mempool *mp; /* Cached Memory Pool. */
> +               struct ibv_mr *mr; /* Memory Region (for mp). */
> +               uint32_t lkey; /* mr->lkey */
> +       } mp2mr[MLX4_PMD_TX_MP_CACHE]; /* MP to MR translation table. */
> +       struct ibv_cq *cq; /* Completion Queue. */
> +       struct ibv_qp *qp; /* Queue Pair. */
> +#if MLX4_PMD_MAX_INLINE > 0
> +       uint32_t max_inline; /* Max inline send size <= MLX4_PMD_MAX_INLINE. */
> +#endif
> +       unsigned int elts_n; /* (*elts)[] length. */
> +       struct txq_elt (*elts)[]; /* TX elements. */
> +       unsigned int elts_head; /* Current index in (*elts)[]. */
> +       unsigned int elts_tail; /* First element awaiting completion. */
> +       unsigned int elts_comp; /* Number of completion requests. */
> +       struct mlx4_txq_stats stats; /* TX queue counters. */
> +       linear_t (*elts_linear)[]; /* Linearized buffers. */
> +       struct ibv_mr *mr_linear; /* Memory Region for linearized buffers. */
> +       unsigned int socket; /* CPU socket ID for allocations. */
> +};
> +
> +struct priv {
> +       struct rte_eth_dev *dev; /* Ethernet device. */
> +       struct ibv_context *ctx; /* Verbs context. */
> +       struct ibv_device_attr device_attr; /* Device properties. */
> +       struct ibv_port_attr port_attr; /* Physical port properties. */
> +       struct ibv_pd *pd; /* Protection Domain. */
> +       /*
> +        * MAC addresses array and configuration bit-field.
> +        * An extra entry that cannot be modified by the DPDK is reserved
> +        * for broadcast frames (destination MAC address ff:ff:ff:ff:ff:ff).
> +        */
> +       struct ether_addr mac[MLX4_MAX_MAC_ADDRESSES];
> +       BITFIELD_DECLARE(mac_configured, uint32_t, MLX4_MAX_MAC_ADDRESSES);
> +       /* VLAN filters. */
> +       struct {
> +               unsigned int enabled:1; /* If enabled. */
> +               unsigned int id:12; /* VLAN ID (0-4095). */
> +       } vlan_filter[MLX4_MAX_VLAN_IDS]; /* VLAN filters table. */
> +       /* Device properties. */
> +       uint16_t mtu; /* Configured MTU. */
> +       uint8_t port; /* Physical port number. */
> +       unsigned int started:1; /* Device started, flows enabled. */
> +       unsigned int promisc:1; /* Device in promiscuous mode. */
> +       unsigned int promisc_ok:1; /* Promiscuous flow is supported. */
> +       unsigned int allmulti:1; /* Device receives all multicast packets. */
> +       unsigned int hw_qpg:1; /* QP groups are supported. */
> +       unsigned int hw_tss:1; /* TSS is supported. */
> +       unsigned int hw_rss:1; /* RSS is supported. */
> +       unsigned int rss:1; /* RSS is enabled. */
> +       unsigned int vf:1; /* This is a VF device. */
> +#ifdef INLINE_RECV
> +       unsigned int inl_recv_size; /* Inline recv size */
> +#endif
> +       unsigned int max_rss_tbl_sz; /* Maximum number of RSS queues. */
> +       /* RX/TX queues. */
> +       struct rxq rxq_parent; /* Parent queue when RSS is enabled. */
> +       unsigned int rxqs_n; /* RX queues array size. */
> +       unsigned int txqs_n; /* TX queues array size. */
> +       struct rxq *(*rxqs)[]; /* RX queues. */
> +       struct txq *(*txqs)[]; /* TX queues. */
> +       rte_spinlock_t lock; /* Lock for control functions. */
> +};
> +
> +/**
> + * Lock private structure to protect it from concurrent access in the
> + * control path.
> + *
> + * @param priv
> + *   Pointer to private structure.
> + */
> +static void
> +priv_lock(struct priv *priv)
> +{
> +       rte_spinlock_lock(&priv->lock);
> +}
> +
> +/**
> + * Unlock private structure.
> + *
> + * @param priv
> + *   Pointer to private structure.
> + */
> +static void
> +priv_unlock(struct priv *priv)
> +{
> +       rte_spinlock_unlock(&priv->lock);
> +}
> +
> +/* Allocate a buffer on the stack and fill it with a printf format string. */
> +#define MKSTR(name, ...) \
> +       char name[snprintf(NULL, 0, __VA_ARGS__) + 1]; \
> +       \
> +       snprintf(name, sizeof(name), __VA_ARGS__)
> +
> +/**
> + * 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.
> + */
> +static int
> +priv_get_ifname(const struct priv *priv, char (*ifname)[IF_NAMESIZE])
> +{
> +       int ret = -1;
> +       DIR *dir;
> +       struct dirent *dent;
> +
> +       {
> +               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_id;
> +               int r;
> +
> +               if ((name[0] == '.') &&
> +                   ((name[1] == '\0') ||
> +                    ((name[1] == '.') && (name[2] == '\0'))))
> +                       continue;
> +
> +               MKSTR(path, "%s/device/net/%s/dev_id",
> +                     priv->ctx->device->ibdev_path, name);
> +
> +               file = fopen(path, "rb");
> +               if (file == NULL)
> +                       continue;
> +               r = fscanf(file, "%x", &dev_id);
> +               fclose(file);
> +               if ((r == 1) && (dev_id == (priv->port - 1u))) {
> +                       snprintf(*ifname, sizeof(*ifname), "%s", name);
> +                       ret = 0;
> +                       break;
> +               }
> +       }
> +       closedir(dir);
> +       return ret;
> +}
> +
> +/**
> + * 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.
> + */
> +static 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;
> +}
> +
> +/**
> + * 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.
> + */
> +static 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)
> +{
> +       return priv_set_sysfs_ulong(priv, "mtu", mtu);
> +}
> +
> +/**
> + * 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.
> + */
> +static 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;
> +       return priv_set_sysfs_ulong(priv, "flags", tmp);
> +}
> +
> +/* Device configuration. */
> +
> +static int
> +rxq_setup(struct rte_eth_dev *dev, struct rxq *rxq, uint16_t desc,
> +         unsigned int socket, const struct rte_eth_rxconf *conf,
> +         struct rte_mempool *mp);
> +
> +static void
> +rxq_cleanup(struct rxq *rxq);
> +
> +/**
> + * Ethernet device configuration.
> + *
> + * Prepare the driver for a given number of TX and RX queues.
> + * Allocate parent RSS queue when several RX queues are requested.
> + *
> + * @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 tmp;
> +       int ret;
> +
> +       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->rxqs_n)
> +               return 0;
> +       INFO("%p: RX queues number update: %u -> %u",
> +            (void *)dev, priv->rxqs_n, rxqs_n);
> +       /* If RSS is enabled, disable it first. */
> +       if (priv->rss) {
> +               unsigned int i;
> +
> +               /* Only if there are no remaining child RX queues. */
> +               for (i = 0; (i != priv->rxqs_n); ++i)
> +                       if ((*priv->rxqs)[i] != NULL)
> +                               return EINVAL;
> +               rxq_cleanup(&priv->rxq_parent);
> +               priv->rss = 0;
> +               priv->rxqs_n = 0;
> +       }
> +       if (rxqs_n <= 1) {
> +               /* Nothing else to do. */
> +               priv->rxqs_n = rxqs_n;
> +               return 0;
> +       }
> +       /* Allocate a new RSS parent queue if supported by hardware. */
> +       if (!priv->hw_rss) {
> +               ERROR("%p: only a single RX queue can be configured when"
> +                     " hardware doesn't support RSS",
> +                     (void *)dev);
> +               return EINVAL;
> +       }
> +       /* Fail if hardware doesn't support that many RSS queues. */
> +       if (rxqs_n >= priv->max_rss_tbl_sz) {
> +               ERROR("%p: only %u RX queues can be configured for RSS",
> +                     (void *)dev, priv->max_rss_tbl_sz);
> +               return EINVAL;
> +       }
> +       priv->rss = 1;
> +       tmp = priv->rxqs_n;
> +       priv->rxqs_n = rxqs_n;
> +       ret = rxq_setup(dev, &priv->rxq_parent, 0, 0, NULL, NULL);
> +       if (!ret)
> +               return 0;
> +       /* Failure, rollback. */
> +       priv->rss = 0;
> +       priv->rxqs_n = tmp;
> +       assert(ret > 0);
> +       return ret;
> +}
> +
> +/**
> + * DPDK callback for Ethernet device configuration.
> + *
> + * @param dev
> + *   Pointer to Ethernet device structure.
> + *
> + * @return
> + *   0 on success, negative errno value on failure.
> + */
> +static int
> +mlx4_dev_configure(struct rte_eth_dev *dev)
> +{
> +       struct priv *priv = dev->data->dev_private;
> +       int ret;
> +
> +       priv_lock(priv);
> +       ret = dev_configure(dev);
> +       assert(ret >= 0);
> +       priv_unlock(priv);
> +       return -ret;
> +}
> +
> +/* TX queues handling. */
> +
> +/**
> + * Allocate TX queue elements.
> + *
> + * @param txq
> + *   Pointer to TX queue structure.
> + * @param elts_n
> + *   Number of elements to allocate.
> + *
> + * @return
> + *   0 on success, errno value on failure.
> + */
> +static int
> +txq_alloc_elts(struct txq *txq, unsigned int elts_n)
> +{
> +       unsigned int i;
> +       struct txq_elt (*elts)[elts_n] =
> +               rte_calloc_socket("TXQ", 1, sizeof(*elts), 0, txq->socket);
> +       linear_t (*elts_linear)[elts_n] =
> +               rte_calloc_socket("TXQ", 1, sizeof(*elts_linear), 0,
> +                                 txq->socket);
> +       struct ibv_mr *mr_linear = NULL;
> +       int ret = 0;
> +
> +       if ((elts == NULL) || (elts_linear == NULL)) {
> +               ERROR("%p: can't allocate packets array", (void *)txq);
> +               ret = ENOMEM;
> +               goto error;
> +       }
> +       mr_linear =
> +               ibv_reg_mr(txq->priv->pd, elts_linear, sizeof(*elts_linear),
> +                          (IBV_ACCESS_LOCAL_WRITE | IBV_ACCESS_REMOTE_WRITE));
> +       if (mr_linear == NULL) {
> +               ERROR("%p: unable to configure MR, ibv_reg_mr() failed",
> +                     (void *)txq);
> +               ret = EINVAL;
> +               goto error;
> +       }
> +       for (i = 0; (i != elts_n); ++i) {
> +               struct txq_elt *elt = &(*elts)[i];
> +               mlx4_send_wr_t *wr = &elt->wr;
> +
> +               /* Configure WR. */
> +               WR_ID(wr->wr_id).id = i;
> +               WR_ID(wr->wr_id).offset = 0;
> +               wr->sg_list = &elt->sges[0];
> +               wr->opcode = IBV_WR_SEND;
> +               /* Other fields are updated during TX. */
> +       }
> +       DEBUG("%p: allocated and configured %u WRs", (void *)txq, elts_n);
> +       txq->elts_n = elts_n;
> +       txq->elts = elts;
> +       txq->elts_head = 0;
> +       txq->elts_tail = 0;
> +       txq->elts_comp = 0;
> +       txq->elts_linear = elts_linear;
> +       txq->mr_linear = mr_linear;
> +       assert(ret == 0);
> +       return 0;
> +error:
> +       if (mr_linear != NULL)
> +               claim_zero(ibv_dereg_mr(mr_linear));
> +
> +       rte_free(elts_linear);
> +       rte_free(elts);
> +
> +       DEBUG("%p: failed, freed everything", (void *)txq);
> +       assert(ret > 0);
> +       return ret;
> +}
> +
> +/**
> + * Free TX queue elements.
> + *
> + * @param txq
> + *   Pointer to TX queue structure.
> + */
> +static void
> +txq_free_elts(struct txq *txq)
> +{
> +       unsigned int i;
> +       unsigned int elts_n = txq->elts_n;
> +       struct txq_elt (*elts)[elts_n] = txq->elts;
> +       linear_t (*elts_linear)[elts_n] = txq->elts_linear;
> +       struct ibv_mr *mr_linear = txq->mr_linear;
> +
> +       DEBUG("%p: freeing WRs", (void *)txq);
> +       txq->elts_n = 0;
> +       txq->elts = NULL;
> +       txq->elts_linear = NULL;
> +       txq->mr_linear = NULL;
> +       if (mr_linear != NULL)
> +               claim_zero(ibv_dereg_mr(mr_linear));
> +
> +       rte_free(elts_linear);
> +       if (elts == NULL)
> +               return;
> +       for (i = 0; (i != elemof(*elts)); ++i) {
> +               struct txq_elt *elt = &(*elts)[i];
> +
> +               if (WR_ID(elt->wr.wr_id).offset == 0)
> +                       continue;
> +               rte_pktmbuf_free((void *)(elt->sges[0].addr -
> +                                         WR_ID(elt->wr.wr_id).offset));
> +       }
> +       rte_free(elts);
> +}
> +
> +
> +/**
> + * Clean up a TX queue.
> + *
> + * Destroy objects, free allocated memory and reset the structure for reuse.
> + *
> + * @param txq
> + *   Pointer to TX queue structure.
> + */
> +static void
> +txq_cleanup(struct txq *txq)
> +{
> +       size_t i;
> +
> +       DEBUG("cleaning up %p", (void *)txq);
> +       txq_free_elts(txq);
> +       if (txq->qp != NULL)
> +               claim_zero(ibv_destroy_qp(txq->qp));
> +       if (txq->cq != NULL)
> +               claim_zero(ibv_destroy_cq(txq->cq));
> +       for (i = 0; (i != elemof(txq->mp2mr)); ++i) {
> +               if (txq->mp2mr[i].mp == NULL)
> +                       break;
> +               assert(txq->mp2mr[i].mr != NULL);
> +               claim_zero(ibv_dereg_mr(txq->mp2mr[i].mr));
> +       }
> +       memset(txq, 0, sizeof(*txq));
> +}
> +
> +/**
> + * Manage TX completions.
> + *
> + * When sending a burst, mlx4_tx_burst() posts several WRs.
> + * To improve performance, a completion event is only required for the last of
> + * them. Doing so discards completion information for other WRs, but this
> + * information would not be used anyway.
> + *
> + * @param txq
> + *   Pointer to TX queue structure.
> + *
> + * @return
> + *   0 on success, -1 on failure.
> + */
> +static int
> +txq_complete(struct txq *txq)
> +{
> +       unsigned int elts_comp = txq->elts_comp;
> +       unsigned int elts_tail;
> +       const unsigned int elts_n = txq->elts_n;
> +       struct ibv_wc wcs[elts_comp];
> +       int wcs_n;
> +
> +       if (unlikely(elts_comp == 0))
> +               return 0;
> +#ifdef DEBUG_SEND
> +       DEBUG("%p: processing %u work requests completions",
> +             (void *)txq, elts_comp);
> +#endif
> +       wcs_n = ibv_poll_cq(txq->cq, elts_comp, wcs);
> +       if (unlikely(wcs_n == 0))
> +               return 0;
> +       if (unlikely(wcs_n < 0)) {
> +               DEBUG("%p: ibv_poll_cq() failed (wcs_n=%d)",
> +                     (void *)txq, wcs_n);
> +               return -1;
> +       }
> +       elts_comp -= wcs_n;
> +       assert(elts_comp <= txq->elts_comp);
> +       /*
> +        * Work Completion ID contains the associated element index in
> +        * (*txq->elts)[]. Since WCs are returned in order, we only need to
> +        * look at the last WC to clear older Work Requests.
> +        *
> +        * Assume WC status is successful as nothing can be done about it
> +        * anyway.
> +        */
> +       elts_tail = WR_ID(wcs[wcs_n - 1].wr_id).id;
> +       /* Consume the last WC. */
> +       if (++elts_tail >= elts_n)
> +               elts_tail = 0;
> +       txq->elts_tail = elts_tail;
> +       txq->elts_comp = elts_comp;
> +       return 0;
> +}
> +
> +/**
> + * Get Memory Region (MR) <-> Memory Pool (MP) association from txq->mp2mr[].
> + * Add MP to txq->mp2mr[] if it's not registered yet. If mp2mr[] is full,
> + * remove an entry first.
> + *
> + * @param txq
> + *   Pointer to TX queue structure.
> + * @param[in] mp
> + *   Memory Pool for which a Memory Region lkey must be returned.
> + *
> + * @return
> + *   mr->lkey on success, (uint32_t)-1 on failure.
> + */
> +static uint32_t
> +txq_mp2mr(struct txq *txq, struct rte_mempool *mp)
> +{
> +       unsigned int i;
> +       struct ibv_mr *mr;
> +
> +       for (i = 0; (i != elemof(txq->mp2mr)); ++i) {
> +               if (unlikely(txq->mp2mr[i].mp == NULL)) {
> +                       /* Unknown MP, add a new MR for it. */
> +                       break;
> +               }
> +               if (txq->mp2mr[i].mp == mp) {
> +                       assert(txq->mp2mr[i].lkey != (uint32_t)-1);
> +                       assert(txq->mp2mr[i].mr->lkey == txq->mp2mr[i].lkey);
> +                       return txq->mp2mr[i].lkey;
> +               }
> +       }
> +       /* Add a new entry, register MR first. */
> +       DEBUG("%p: discovered new memory pool %p", (void *)txq, (void *)mp);
> +       mr = ibv_reg_mr(txq->priv->pd,
> +                       (void *)mp->elt_va_start,
> +                       (mp->elt_va_end - mp->elt_va_start),
> +                       (IBV_ACCESS_LOCAL_WRITE | IBV_ACCESS_REMOTE_WRITE));
> +       if (unlikely(mr == NULL)) {
> +               DEBUG("%p: unable to configure MR, ibv_reg_mr() failed.",
> +                     (void *)txq);
> +               return (uint32_t)-1;
> +       }
> +       if (unlikely(i == elemof(txq->mp2mr))) {
> +               /* Table is full, remove oldest entry. */
> +               DEBUG("%p: MR <-> MP table full, dropping oldest entry.",
> +                     (void *)txq);
> +               --i;
> +               claim_zero(ibv_dereg_mr(txq->mp2mr[i].mr));
> +               memmove(&txq->mp2mr[0], &txq->mp2mr[1],
> +                       (sizeof(txq->mp2mr) - sizeof(txq->mp2mr[0])));
> +       }
> +       /* Store the new entry. */
> +       txq->mp2mr[i].mp = mp;
> +       txq->mp2mr[i].mr = mr;
> +       txq->mp2mr[i].lkey = mr->lkey;
> +       DEBUG("%p: new MR lkey for MP %p: 0x%08" PRIu32,
> +             (void *)txq, (void *)mp, txq->mp2mr[i].lkey);
> +       return txq->mp2mr[i].lkey;
> +}
> +
> +/**
> + * Copy scattered mbuf contents to a single linear buffer.
> + *
> + * @param[out] linear
> + *   Linear output buffer.
> + * @param[in] buf
> + *   Scattered input buffer.
> + *
> + * @return
> + *   Number of bytes copied to the output buffer or 0 if not large enough.
> + */
> +static unsigned int
> +linearize_mbuf(linear_t *linear, struct rte_mbuf *buf)
> +{
> +       unsigned int size = 0;
> +       unsigned int offset;
> +
> +       do {
> +               unsigned int len = DATA_LEN(buf);
> +
> +               offset = size;
> +               size += len;
> +               if (unlikely(size > sizeof(*linear)))
> +                       return 0;
> +               memcpy(&(*linear)[offset],
> +                      rte_pktmbuf_mtod(buf, uint8_t *),
> +                      len);
> +               buf = NEXT(buf);
> +       } while (buf != NULL);
> +       return size;
> +}
> +
> +/**
> + * DPDK callback for TX.
> + *
> + * @param dpdk_txq
> + *   Generic pointer to TX queue structure.
> + * @param[in] pkts
> + *   Packets to transmit.
> + * @param pkts_n
> + *   Number of packets in array.
> + *
> + * @return
> + *   Number of packets successfully transmitted (<= pkts_n).
> + */
> +static uint16_t
> +mlx4_tx_burst(void *dpdk_txq, struct rte_mbuf **pkts, uint16_t pkts_n)
> +{
> +       struct txq *txq = (struct txq *)dpdk_txq;
> +       mlx4_send_wr_t head;
> +       mlx4_send_wr_t **wr_next = &head.next;
> +       mlx4_send_wr_t *bad_wr;
> +       unsigned int elts_head = txq->elts_head;
> +       const unsigned int elts_tail = txq->elts_tail;
> +       const unsigned int elts_n = txq->elts_n;
> +       unsigned int i;
> +       unsigned int max;
> +       int err;
> +
> +       txq_complete(txq);
> +       max = (elts_n - (elts_head - elts_tail));
> +       if (max > elts_n)
> +               max -= elts_n;
> +       assert(max >= 1);
> +       assert(max <= elts_n);
> +       /* Always leave one free entry in the ring. */
> +       --max;
> +       if (max == 0)
> +               return 0;
> +       if (max > pkts_n)
> +               max = pkts_n;
> +       for (i = 0; (i != max); ++i) {
> +               struct rte_mbuf *buf = pkts[i];
> +               struct txq_elt *elt = &(*txq->elts)[elts_head];
> +               mlx4_send_wr_t *wr = &elt->wr;
> +               unsigned int segs = NB_SEGS(buf);
> +#if (MLX4_PMD_MAX_INLINE > 0) || defined(MLX4_PMD_SOFT_COUNTERS)
> +               unsigned int sent_size = 0;
> +#endif
> +               unsigned int j;
> +               int linearize = 0;
> +
> +               /* Clean up old buffer. */
> +               if (likely(WR_ID(wr->wr_id).offset != 0)) {
> +                       struct rte_mbuf *tmp = (void *)
> +                               (elt->sges[0].addr - WR_ID(wr->wr_id).offset);
> +
> +                       /* Faster than rte_pktmbuf_free(). */
> +                       do {
> +                               struct rte_mbuf *next = NEXT(tmp);
> +
> +                               rte_pktmbuf_free_seg(tmp);
> +                               tmp = next;
> +                       } while (tmp != NULL);
> +               }
> +#ifndef NDEBUG
> +               /* For assert(). */
> +               WR_ID(wr->wr_id).offset = 0;
> +               for (j = 0; ((int)j < wr->num_sge); ++j) {
> +                       elt->sges[j].addr = 0;
> +                       elt->sges[j].length = 0;
> +                       elt->sges[j].lkey = 0;
> +               }
> +               wr->next = NULL;
> +               wr->num_sge = 0;
> +#endif
> +               /* Sanity checks, most of which are only relevant with
> +                * debugging enabled. */
> +               assert(WR_ID(wr->wr_id).id == elts_head);
> +               assert(WR_ID(wr->wr_id).offset == 0);
> +               assert(wr->next == NULL);
> +               assert(wr->sg_list == &elt->sges[0]);
> +               assert(wr->num_sge == 0);
> +               assert(wr->opcode == IBV_WR_SEND);
> +               /* When there are too many segments, extra segments are
> +                * linearized in the last SGE. */
> +               if (unlikely(segs > elemof(elt->sges))) {
> +                       segs = (elemof(elt->sges) - 1);
> +                       linearize = 1;
> +               }
> +               /* Set WR fields. */
> +               assert(((uintptr_t)rte_pktmbuf_mtod(buf, char *) -
> +                       (uintptr_t)buf) <= 0xffff);
> +               WR_ID(wr->wr_id).offset =
> +                       ((uintptr_t)rte_pktmbuf_mtod(buf, char *) -
> +                        (uintptr_t)buf);
> +               wr->num_sge = segs;
> +               /* Register segments as SGEs. */
> +               for (j = 0; (j != segs); ++j) {
> +                       struct ibv_sge *sge = &elt->sges[j];
> +                       uint32_t lkey;
> +
> +                       /* Retrieve Memory Region key for this memory pool. */
> +                       lkey = txq_mp2mr(txq, buf->pool);
> +                       if (unlikely(lkey == (uint32_t)-1)) {
> +                               /* MR does not exist. */
> +                               DEBUG("%p: unable to get MP <-> MR"
> +                                     " association", (void *)txq);
> +                               /* Clean up TX element. */
> +                               WR_ID(elt->wr.wr_id).offset = 0;
> +#ifndef NDEBUG
> +                               /* For assert(). */
> +                               while (j) {
> +                                       --j;
> +                                       --sge;
> +                                       sge->addr = 0;
> +                                       sge->length = 0;
> +                                       sge->lkey = 0;
> +                               }
> +                               wr->num_sge = 0;
> +#endif
> +                               goto stop;
> +                       }
> +                       /* Sanity checks, only relevant with debugging
> +                        * enabled. */
> +                       assert(sge->addr == 0);
> +                       assert(sge->length == 0);
> +                       assert(sge->lkey == 0);
> +                       /* Update SGE. */
> +                       sge->addr = (uintptr_t)rte_pktmbuf_mtod(buf, char *);
> +                       if (txq->priv->vf)
> +                               rte_prefetch0((volatile void *)sge->addr);
> +                       sge->length = DATA_LEN(buf);
> +                       sge->lkey = lkey;
> +#if (MLX4_PMD_MAX_INLINE > 0) || defined(MLX4_PMD_SOFT_COUNTERS)
> +                       sent_size += sge->length;
> +#endif
> +                       buf = NEXT(buf);
> +               }
> +               /* If buf is not NULL here and is not going to be linearized,
> +                * nb_segs is not valid. */
> +               assert(j == segs);
> +               assert((buf == NULL) || (linearize));
> +               /* Linearize extra segments. */
> +               if (linearize) {
> +                       struct ibv_sge *sge = &elt->sges[segs];
> +                       linear_t *linear = &(*txq->elts_linear)[elts_head];
> +                       unsigned int size = linearize_mbuf(linear, buf);
> +
> +                       assert(segs == (elemof(elt->sges) - 1));
> +                       if (size == 0) {
> +                               /* Invalid packet. */
> +                               DEBUG("%p: packet too large to be linearized.",
> +                                     (void *)txq);
> +                               /* Clean up TX element. */
> +                               WR_ID(elt->wr.wr_id).offset = 0;
> +#ifndef NDEBUG
> +                               /* For assert(). */
> +                               while (j) {
> +                                       --j;
> +                                       --sge;
> +                                       sge->addr = 0;
> +                                       sge->length = 0;
> +                                       sge->lkey = 0;
> +                               }
> +                               wr->num_sge = 0;
> +#endif
> +                               goto stop;
> +                       }
> +                       /* If MLX4_PMD_SGE_WR_N is 1, free mbuf immediately
> +                        * and clear offset from WR ID. */
> +                       if (elemof(elt->sges) == 1) {
> +                               do {
> +                                       struct rte_mbuf *next = NEXT(buf);
> +
> +                                       rte_pktmbuf_free_seg(buf);
> +                                       buf = next;
> +                               } while (buf != NULL);
> +                               WR_ID(wr->wr_id).offset = 0;
> +                       }
> +                       /* Set WR fields and fill SGE with linear buffer. */
> +                       ++wr->num_sge;
> +                       /* Sanity checks, only relevant with debugging
> +                        * enabled. */
> +                       assert(sge->addr == 0);
> +                       assert(sge->length == 0);
> +                       assert(sge->lkey == 0);
> +                       /* Update SGE. */
> +                       sge->addr = (uintptr_t)&(*linear)[0];
> +                       sge->length = size;
> +                       sge->lkey = txq->mr_linear->lkey;
> +#if (MLX4_PMD_MAX_INLINE > 0) || defined(MLX4_PMD_SOFT_COUNTERS)
> +                       sent_size += size;
> +#endif
> +               }
> +               /* Link WRs together for ibv_post_send(). */
> +               *wr_next = wr;
> +               wr_next = &wr->next;
> +#if MLX4_PMD_MAX_INLINE > 0
> +               if (sent_size <= txq->max_inline)
> +                       wr->send_flags = IBV_SEND_INLINE;
> +               else
> +#endif
> +                       wr->send_flags = 0;
> +               if (++elts_head >= elts_n)
> +                       elts_head = 0;
> +#ifdef MLX4_PMD_SOFT_COUNTERS
> +               /* Increment sent bytes counter. */
> +               txq->stats.obytes += sent_size;
> +#endif
> +       }
> +stop:
> +       /* Take a shortcut if nothing must be sent. */
> +       if (unlikely(i == 0))
> +               return 0;
> +#ifdef MLX4_PMD_SOFT_COUNTERS
> +       /* Increment sent packets counter. */
> +       txq->stats.opackets += i;
> +#endif
> +       *wr_next = NULL;
> +       /* The last WR is the only one asking for a completion event. */
> +       containerof(wr_next, mlx4_send_wr_t, next)->
> +               send_flags |= IBV_SEND_SIGNALED;
> +       err = mlx4_post_send(txq->qp, head.next, &bad_wr);
> +       if (unlikely(err)) {
> +               unsigned int unsent = 0;
> +
> +               /* An error occurred, completion event is lost. Fix counters. */
> +               while (bad_wr != NULL) {
> +                       struct txq_elt *elt =
> +                               containerof(bad_wr, struct txq_elt, wr);
> +                       mlx4_send_wr_t *wr = &elt->wr;
> +                       mlx4_send_wr_t *next = wr->next;
> +#if defined(MLX4_PMD_SOFT_COUNTERS) || !defined(NDEBUG)
> +                       unsigned int j;
> +#endif
> +
> +                       assert(wr == bad_wr);
> +                       /* Clean up TX element without freeing it, caller
> +                        * should take care of this. */
> +                       WR_ID(elt->wr.wr_id).offset = 0;
> +#ifdef MLX4_PMD_SOFT_COUNTERS
> +                       for (j = 0; ((int)j < wr->num_sge); ++j)
> +                               txq->stats.obytes -= wr->sg_list[j].length;
> +#endif
> +                       ++unsent;
> +#ifndef NDEBUG
> +                       /* For assert(). */
> +                       for (j = 0; ((int)j < wr->num_sge); ++j) {
> +                               elt->sges[j].addr = 0;
> +                               elt->sges[j].length = 0;
> +                               elt->sges[j].lkey = 0;
> +                       }
> +                       wr->next = NULL;
> +                       wr->num_sge = 0;
> +#endif
> +                       bad_wr = next;
> +               }
> +#ifdef MLX4_PMD_SOFT_COUNTERS
> +               txq->stats.opackets -= unsent;
> +#endif
> +               assert(i >= unsent);
> +               i -= unsent;
> +               /* "Unsend" remaining packets. */
> +               elts_head -= unsent;
> +               if (elts_head >= elts_n)
> +                       elts_head += elts_n;
> +               assert(elts_head < elts_n);
> +               DEBUG("%p: mlx4_post_send() failed, %u unprocessed WRs: %s",
> +                     (void *)txq, unsent,
> +                     ((err <= -1) ? "Internal error" : strerror(err)));
> +       } else
> +               ++txq->elts_comp;
> +       txq->elts_head = elts_head;
> +       return i;
> +}
> +
> +/**
> + * Configure a TX queue.
> + *
> + * @param dev
> + *   Pointer to Ethernet device structure.
> + * @param txq
> + *   Pointer to TX queue structure.
> + * @param desc
> + *   Number of descriptors to configure in queue.
> + * @param socket
> + *   NUMA socket on which memory must be allocated.
> + * @param[in] conf
> + *   Thresholds parameters.
> + *
> + * @return
> + *   0 on success, errno value on failure.
> + */
> +static int
> +txq_setup(struct rte_eth_dev *dev, struct txq *txq, uint16_t desc,
> +         unsigned int socket, const struct rte_eth_txconf *conf)
> +{
> +       struct priv *priv = dev->data->dev_private;
> +       struct txq tmpl = {
> +               .priv = priv,
> +               .socket = socket
> +       };
> +       union {
> +               struct ibv_qp_init_attr init;
> +               struct ibv_exp_qp_attr mod;
> +       } attr;
> +       int ret = 0;
> +
> +       (void)conf; /* Thresholds configuration (ignored). */
> +       if ((desc == 0) || (desc % MLX4_PMD_SGE_WR_N)) {
> +               ERROR("%p: invalid number of TX descriptors (must be a"
> +                     " multiple of %d)", (void *)dev, desc);
> +               return EINVAL;
> +       }
> +       desc /= MLX4_PMD_SGE_WR_N;
> +       /* MRs will be registered in mp2mr[] later. */
> +       tmpl.cq = ibv_create_cq(priv->ctx, desc, NULL, NULL, 0);
> +       if (tmpl.cq == NULL) {
> +               ret = ENOMEM;
> +               ERROR("%p: CQ creation failure: %s",
> +                     (void *)dev, strerror(ret));
> +               goto error;
> +       }
> +       DEBUG("priv->device_attr.max_qp_wr is %d",
> +             priv->device_attr.max_qp_wr);
> +       DEBUG("priv->device_attr.max_sge is %d",
> +             priv->device_attr.max_sge);
> +       attr.init = (struct ibv_qp_init_attr){
> +               /* CQ to be associated with the send queue. */
> +               .send_cq = tmpl.cq,
> +               /* CQ to be associated with the receive queue. */
> +               .recv_cq = tmpl.cq,
> +               .cap = {
> +                       /* Max number of outstanding WRs. */
> +                       .max_send_wr = ((priv->device_attr.max_qp_wr < desc) ?
> +                                       priv->device_attr.max_qp_wr :
> +                                       desc),
> +                       /* Max number of scatter/gather elements in a WR. */
> +                       .max_send_sge = ((priv->device_attr.max_sge <
> +                                         MLX4_PMD_SGE_WR_N) ?
> +                                        priv->device_attr.max_sge :
> +                                        MLX4_PMD_SGE_WR_N),
> +#if MLX4_PMD_MAX_INLINE > 0
> +                       .max_inline_data = MLX4_PMD_MAX_INLINE,
> +#endif
> +               },
> +               .qp_type = IBV_QPT_RAW_PACKET,
> +               /* Do *NOT* enable this, completions events are managed per
> +                * TX burst. */
> +               .sq_sig_all = 0
> +       };
> +       tmpl.qp = ibv_create_qp(priv->pd, &attr.init);
> +       if (tmpl.qp == NULL) {
> +               ret = (errno ? errno : EINVAL);
> +               ERROR("%p: QP creation failure: %s",
> +                     (void *)dev, strerror(ret));
> +               goto error;
> +       }
> +#if MLX4_PMD_MAX_INLINE > 0
> +       /* ibv_create_qp() updates this value. */
> +       tmpl.max_inline = attr.init.cap.max_inline_data;
> +#endif
> +       attr.mod = (struct ibv_exp_qp_attr){
> +               /* Move the QP to this state. */
> +               .qp_state = IBV_QPS_INIT,
> +               /* Primary port number. */
> +               .port_num = priv->port
> +       };
> +       ret = ibv_exp_modify_qp(tmpl.qp, &attr.mod,
> +                               (IBV_EXP_QP_STATE | IBV_EXP_QP_PORT));
> +       if (ret) {
> +               ERROR("%p: QP state to IBV_QPS_INIT failed: %s",
> +                     (void *)dev, strerror(ret));
> +               goto error;
> +       }
> +       ret = txq_alloc_elts(&tmpl, desc);
> +       if (ret) {
> +               ERROR("%p: TXQ allocation failed: %s",
> +                     (void *)dev, strerror(ret));
> +               goto error;
> +       }
> +       attr.mod = (struct ibv_exp_qp_attr){
> +               .qp_state = IBV_QPS_RTR
> +       };
> +       ret = ibv_exp_modify_qp(tmpl.qp, &attr.mod, IBV_EXP_QP_STATE);
> +       if (ret) {
> +               ERROR("%p: QP state to IBV_QPS_RTR failed: %s",
> +                     (void *)dev, strerror(ret));
> +               goto error;
> +       }
> +       attr.mod.qp_state = IBV_QPS_RTS;
> +       ret = ibv_exp_modify_qp(tmpl.qp, &attr.mod, IBV_EXP_QP_STATE);
> +       if (ret) {
> +               ERROR("%p: QP state to IBV_QPS_RTS failed: %s",
> +                     (void *)dev, strerror(ret));
> +               goto error;
> +       }
> +       /* Clean up txq in case we're reinitializing it. */
> +       DEBUG("%p: cleaning-up old txq just in case", (void *)txq);
> +       txq_cleanup(txq);
> +       *txq = tmpl;
> +       DEBUG("%p: txq updated with %p", (void *)txq, (void *)&tmpl);
> +       assert(ret == 0);
> +       return 0;
> +error:
> +       txq_cleanup(&tmpl);
> +       assert(ret > 0);
> +       return ret;
> +}
> +
> +/**
> + * DPDK callback to configure a TX queue.
> + *
> + * @param dev
> + *   Pointer to Ethernet device structure.
> + * @param idx
> + *   TX queue index.
> + * @param desc
> + *   Number of descriptors to configure in queue.
> + * @param socket
> + *   NUMA socket on which memory must be allocated.
> + * @param[in] conf
> + *   Thresholds parameters.
> + *
> + * @return
> + *   0 on success, negative errno value on failure.
> + */
> +static int
> +mlx4_tx_queue_setup(struct rte_eth_dev *dev, uint16_t idx, uint16_t desc,
> +                   unsigned int socket, const struct rte_eth_txconf *conf)
> +{
> +       struct priv *priv = dev->data->dev_private;
> +       struct txq *txq = (*priv->txqs)[idx];
> +       int ret;
> +
> +       priv_lock(priv);
> +       DEBUG("%p: configuring queue %u for %u descriptors",
> +             (void *)dev, idx, desc);
> +       if (idx >= priv->txqs_n) {
> +               ERROR("%p: queue index out of range (%u >= %u)",
> +                     (void *)dev, idx, priv->txqs_n);
> +               priv_unlock(priv);
> +               return -EOVERFLOW;
> +       }
> +       if (txq != NULL) {
> +               DEBUG("%p: reusing already allocated queue index %u (%p)",
> +                     (void *)dev, idx, (void *)txq);
> +               if (priv->started) {
> +                       priv_unlock(priv);
> +                       return -EEXIST;
> +               }
> +               (*priv->txqs)[idx] = NULL;
> +               txq_cleanup(txq);
> +       } else {
> +               txq = rte_calloc_socket("TXQ", 1, sizeof(*txq), 0, socket);
> +               if (txq == NULL) {
> +                       ERROR("%p: unable to allocate queue index %u",
> +                             (void *)dev, idx);
> +                       priv_unlock(priv);
> +                       return -ENOMEM;
> +               }
> +       }
> +       ret = txq_setup(dev, txq, desc, socket, conf);
> +       if (ret)
> +               rte_free(txq);
> +       else {
> +               txq->stats.idx = idx;
> +               DEBUG("%p: adding TX queue %p to list",
> +                     (void *)dev, (void *)txq);
> +               (*priv->txqs)[idx] = txq;
> +               /* Update send callback. */
> +               dev->tx_pkt_burst = mlx4_tx_burst;
> +       }
> +       priv_unlock(priv);
> +       return -ret;
> +}
> +
> +/**
> + * DPDK callback to release a TX queue.
> + *
> + * @param dpdk_txq
> + *   Generic TX queue pointer.
> + */
> +static void
> +mlx4_tx_queue_release(void *dpdk_txq)
> +{
> +       struct txq *txq = (struct txq *)dpdk_txq;
> +       struct priv *priv;
> +       unsigned int i;
> +
> +       if (txq == NULL)
> +               return;
> +       priv = txq->priv;
> +       priv_lock(priv);
> +       for (i = 0; (i != priv->txqs_n); ++i)
> +               if ((*priv->txqs)[i] == txq) {
> +                       DEBUG("%p: removing TX queue %p from list",
> +                             (void *)priv->dev, (void *)txq);
> +                       (*priv->txqs)[i] = NULL;
> +                       break;
> +               }
> +       txq_cleanup(txq);
> +       rte_free(txq);
> +       priv_unlock(priv);
> +}
> +
> +/* RX queues handling. */
> +
> +/**
> + * Allocate RX queue elements with scattered packets support.
> + *
> + * @param rxq
> + *   Pointer to RX queue structure.
> + * @param elts_n
> + *   Number of elements to allocate.
> + * @param[in] pool
> + *   If not NULL, fetch buffers from this array instead of allocating them
> + *   with rte_pktmbuf_alloc().
> + *
> + * @return
> + *   0 on success, errno value on failure.
> + */
> +static int
> +rxq_alloc_elts_sp(struct rxq *rxq, unsigned int elts_n,
> +                 struct rte_mbuf **pool)
> +{
> +       unsigned int i;
> +       struct rxq_elt_sp (*elts)[elts_n] =
> +               rte_calloc_socket("RXQ elements", 1, sizeof(*elts), 0,
> +                                 rxq->socket);
> +       int ret = 0;
> +
> +       if (elts == NULL) {
> +               ERROR("%p: can't allocate packets array", (void *)rxq);
> +               ret = ENOMEM;
> +               goto error;
> +       }
> +       /* For each WR (packet). */
> +       for (i = 0; (i != elts_n); ++i) {
> +               unsigned int j;
> +               struct rxq_elt_sp *elt = &(*elts)[i];
> +               struct ibv_recv_wr *wr = &elt->wr;
> +               struct ibv_sge (*sges)[(elemof(elt->sges))] = &elt->sges;
> +
> +               /* These two arrays must have the same size. */
> +               assert(elemof(elt->sges) == elemof(elt->bufs));
> +               /* Configure WR. */
> +               wr->wr_id = i;
> +               wr->next = &(*elts)[(i + 1)].wr;
> +               wr->sg_list = &(*sges)[0];
> +               wr->num_sge = elemof(*sges);
> +               /* For each SGE (segment). */
> +               for (j = 0; (j != elemof(elt->bufs)); ++j) {
> +                       struct ibv_sge *sge = &(*sges)[j];
> +                       struct rte_mbuf *buf;
> +
> +                       if (pool != NULL) {
> +                               buf = *(pool++);
> +                               assert(buf != NULL);
> +                               rte_pktmbuf_reset(buf);
> +                       } else
> +                               buf = rte_pktmbuf_alloc(rxq->mp);
> +                       if (buf == NULL) {
> +                               assert(pool == NULL);
> +                               ERROR("%p: empty mbuf pool", (void *)rxq);
> +                               ret = ENOMEM;
> +                               goto error;
> +                       }
> +                       elt->bufs[j] = buf;
> +                       /* Headroom is reserved by rte_pktmbuf_alloc(). */
> +                       assert(DATA_OFF(buf) == RTE_PKTMBUF_HEADROOM);
> +                       /* Buffer is supposed to be empty. */
> +                       assert(rte_pktmbuf_data_len(buf) == 0);
> +                       assert(rte_pktmbuf_pkt_len(buf) == 0);
> +                       /* sge->addr must be able to store a pointer. */
> +                       assert(sizeof(sge->addr) >= sizeof(uintptr_t));
> +                       if (j == 0) {
> +                               /* The first SGE keeps its headroom. */
> +                               sge->addr = (uintptr_t)rte_pktmbuf_mtod(buf,
> +                                                                       char *);
> +                               sge->length = (buf->buf_len -
> +                                              RTE_PKTMBUF_HEADROOM);
> +                       } else {
> +                               /* Subsequent SGEs lose theirs. */
> +                               assert(DATA_OFF(buf) == RTE_PKTMBUF_HEADROOM);
> +                               SET_DATA_OFF(buf, 0);
> +                               sge->addr = (uintptr_t)buf->buf_addr;
> +                               sge->length = buf->buf_len;
> +                       }
> +                       sge->lkey = rxq->mr->lkey;
> +                       /* Redundant check for tailroom. */
> +                       assert(sge->length == rte_pktmbuf_tailroom(buf));
> +               }
> +       }
> +       /* The last WR pointer must be NULL. */
> +       (*elts)[(i - 1)].wr.next = NULL;
> +       DEBUG("%p: allocated and configured %u WRs (%zu segments)",
> +             (void *)rxq, elts_n, (elts_n * elemof((*elts)[0].sges)));
> +       rxq->elts_n = elts_n;
> +       rxq->elts.sp = elts;
> +       assert(ret == 0);
> +       return 0;
> +error:
> +       if (elts != NULL) {
> +               assert(pool == NULL);
> +               for (i = 0; (i != elemof(*elts)); ++i) {
> +                       unsigned int j;
> +                       struct rxq_elt_sp *elt = &(*elts)[i];
> +
> +                       for (j = 0; (j != elemof(elt->bufs)); ++j) {
> +                               struct rte_mbuf *buf = elt->bufs[j];
> +
> +                               if (buf != NULL)
> +                                       rte_pktmbuf_free_seg(buf);
> +                       }
> +               }
> +               rte_free(elts);
> +       }
> +       DEBUG("%p: failed, freed everything", (void *)rxq);
> +       assert(ret > 0);
> +       return ret;
> +}
> +
> +/**
> + * Free RX queue elements with scattered packets support.
> + *
> + * @param rxq
> + *   Pointer to RX queue structure.
> + */
> +static void
> +rxq_free_elts_sp(struct rxq *rxq)
> +{
> +       unsigned int i;
> +       unsigned int elts_n = rxq->elts_n;
> +       struct rxq_elt_sp (*elts)[elts_n] = rxq->elts.sp;
> +
> +       DEBUG("%p: freeing WRs", (void *)rxq);
> +       rxq->elts_n = 0;
> +       rxq->elts.sp = NULL;
> +       if (elts == NULL)
> +               return;
> +       for (i = 0; (i != elemof(*elts)); ++i) {
> +               unsigned int j;
> +               struct rxq_elt_sp *elt = &(*elts)[i];
> +
> +               for (j = 0; (j != elemof(elt->bufs)); ++j) {
> +                       struct rte_mbuf *buf = elt->bufs[j];
> +
> +                       if (buf != NULL)
> +                               rte_pktmbuf_free_seg(buf);
> +               }
> +       }
> +       rte_free(elts);
> +}
> +
> +/**
> + * Allocate RX queue elements.
> + *
> + * @param rxq
> + *   Pointer to RX queue structure.
> + * @param elts_n
> + *   Number of elements to allocate.
> + * @param[in] pool
> + *   If not NULL, fetch buffers from this array instead of allocating them
> + *   with rte_pktmbuf_alloc().
> + *
> + * @return
> + *   0 on success, errno value on failure.
> + */
> +static int
> +rxq_alloc_elts(struct rxq *rxq, unsigned int elts_n, struct rte_mbuf **pool)
> +{
> +       unsigned int i;
> +       struct rxq_elt (*elts)[elts_n] =
> +               rte_calloc_socket("RXQ elements", 1, sizeof(*elts), 0,
> +                                 rxq->socket);
> +       int ret = 0;
> +
> +       if (elts == NULL) {
> +               ERROR("%p: can't allocate packets array", (void *)rxq);
> +               ret = ENOMEM;
> +               goto error;
> +       }
> +       /* For each WR (packet). */
> +       for (i = 0; (i != elts_n); ++i) {
> +               struct rxq_elt *elt = &(*elts)[i];
> +               struct ibv_recv_wr *wr = &elt->wr;
> +               struct ibv_sge *sge = &(*elts)[i].sge;
> +               struct rte_mbuf *buf;
> +
> +               if (pool != NULL) {
> +                       buf = *(pool++);
> +                       assert(buf != NULL);
> +                       rte_pktmbuf_reset(buf);
> +               } else
> +                       buf = rte_pktmbuf_alloc(rxq->mp);
> +               if (buf == NULL) {
> +                       assert(pool == NULL);
> +                       ERROR("%p: empty mbuf pool", (void *)rxq);
> +                       ret = ENOMEM;
> +                       goto error;
> +               }
> +               /* Configure WR. Work request ID contains its own index in
> +                * the elts array and the offset between SGE buffer header and
> +                * its data. */
> +               WR_ID(wr->wr_id).id = i;
> +               WR_ID(wr->wr_id).offset =
> +                       (((uintptr_t)buf->buf_addr + RTE_PKTMBUF_HEADROOM) -
> +                        (uintptr_t)buf);
> +               wr->next = &(*elts)[(i + 1)].wr;
> +               wr->sg_list = sge;
> +               wr->num_sge = 1;
> +               /* Headroom is reserved by rte_pktmbuf_alloc(). */
> +               assert(DATA_OFF(buf) == RTE_PKTMBUF_HEADROOM);
> +               /* Buffer is supposed to be empty. */
> +               assert(rte_pktmbuf_data_len(buf) == 0);
> +               assert(rte_pktmbuf_pkt_len(buf) == 0);
> +               /* sge->addr must be able to store a pointer. */
> +               assert(sizeof(sge->addr) >= sizeof(uintptr_t));
> +               /* SGE keeps its headroom. */
> +               sge->addr = (uintptr_t)
> +                       ((uint8_t *)buf->buf_addr + RTE_PKTMBUF_HEADROOM);
> +               sge->length = (buf->buf_len - RTE_PKTMBUF_HEADROOM);
> +               sge->lkey = rxq->mr->lkey;
> +               /* Redundant check for tailroom. */
> +               assert(sge->length == rte_pktmbuf_tailroom(buf));
> +               /* Make sure elts index and SGE mbuf pointer can be deduced
> +                * from WR ID. */
> +               if ((WR_ID(wr->wr_id).id != i) ||
> +                   ((void *)(sge->addr - WR_ID(wr->wr_id).offset) != buf)) {
> +                       ERROR("%p: cannot store index and offset in WR ID",
> +                             (void *)rxq);
> +                       sge->addr = 0;
> +                       rte_pktmbuf_free(buf);
> +                       ret = EOVERFLOW;
> +                       goto error;
> +               }
> +       }
> +       /* The last WR pointer must be NULL. */
> +       (*elts)[(i - 1)].wr.next = NULL;
> +       DEBUG("%p: allocated and configured %u single-segment WRs",
> +             (void *)rxq, elts_n);
> +       rxq->elts_n = elts_n;
> +       rxq->elts.no_sp = elts;
> +       assert(ret == 0);
> +       return 0;
> +error:
> +       if (elts != NULL) {
> +               assert(pool == NULL);
> +               for (i = 0; (i != elemof(*elts)); ++i) {
> +                       struct rxq_elt *elt = &(*elts)[i];
> +                       struct rte_mbuf *buf;
> +
> +                       if (elt->sge.addr == 0)
> +                               continue;
> +                       assert(WR_ID(elt->wr.wr_id).id == i);
> +                       buf = (void *)
> +                               (elt->sge.addr - WR_ID(elt->wr.wr_id).offset);
> +                       rte_pktmbuf_free_seg(buf);
> +               }
> +               rte_free(elts);
> +       }
> +       DEBUG("%p: failed, freed everything", (void *)rxq);
> +       assert(ret > 0);
> +       return ret;
> +}
> +
> +/**
> + * Free RX queue elements.
> + *
> + * @param rxq
> + *   Pointer to RX queue structure.
> + */
> +static void
> +rxq_free_elts(struct rxq *rxq)
> +{
> +       unsigned int i;
> +       unsigned int elts_n = rxq->elts_n;
> +       struct rxq_elt (*elts)[elts_n] = rxq->elts.no_sp;
> +
> +       DEBUG("%p: freeing WRs", (void *)rxq);
> +       rxq->elts_n = 0;
> +       rxq->elts.no_sp = NULL;
> +       if (elts == NULL)
> +               return;
> +       for (i = 0; (i != elemof(*elts)); ++i) {
> +               struct rxq_elt *elt = &(*elts)[i];
> +               struct rte_mbuf *buf;
> +
> +               if (elt->sge.addr == 0)
> +                       continue;
> +               assert(WR_ID(elt->wr.wr_id).id == i);
> +               buf = (void *)(elt->sge.addr - WR_ID(elt->wr.wr_id).offset);
> +               rte_pktmbuf_free_seg(buf);
> +       }
> +       rte_free(elts);
> +}
> +
> +/**
> + * Unregister a MAC address from a RX queue.
> + *
> + * @param rxq
> + *   Pointer to RX queue structure.
> + * @param mac_index
> + *   MAC address index.
> + */
> +static void
> +rxq_mac_addr_del(struct rxq *rxq, unsigned int mac_index)
> +{
> +#ifndef NDEBUG
> +       struct priv *priv = rxq->priv;
> +       const uint8_t (*mac)[ETHER_ADDR_LEN] =
> +               (const uint8_t (*)[ETHER_ADDR_LEN])
> +               priv->mac[mac_index].addr_bytes;
> +#endif
> +
> +       assert(mac_index < elemof(priv->mac));
> +       if (!BITFIELD_ISSET(rxq->mac_configured, mac_index)) {
> +               assert(rxq->mac_flow[mac_index] == NULL);
> +               return;
> +       }
> +       DEBUG("%p: removing MAC address %02x:%02x:%02x:%02x:%02x:%02x"
> +             " index %u",
> +             (void *)rxq,
> +             (*mac)[0], (*mac)[1], (*mac)[2], (*mac)[3], (*mac)[4], (*mac)[5],
> +             mac_index);
> +       assert(rxq->mac_flow[mac_index] != NULL);
> +       claim_zero(ibv_exp_destroy_flow(rxq->mac_flow[mac_index]));
> +       rxq->mac_flow[mac_index] = NULL;
> +       BITFIELD_RESET(rxq->mac_configured, mac_index);
> +}
> +
> +/**
> + * Unregister all MAC addresses from a RX queue.
> + *
> + * @param rxq
> + *   Pointer to RX queue structure.
> + */
> +static void
> +rxq_mac_addrs_del(struct rxq *rxq)
> +{
> +       struct priv *priv = rxq->priv;
> +       unsigned int i;
> +
> +       for (i = 0; (i != elemof(priv->mac)); ++i)
> +               rxq_mac_addr_del(rxq, i);
> +}
> +
> +static int rxq_promiscuous_enable(struct rxq *);
> +static void rxq_promiscuous_disable(struct rxq *);
> +
> +/**
> + * Register a MAC address in a RX queue.
> + *
> + * @param rxq
> + *   Pointer to RX queue structure.
> + * @param mac_index
> + *   MAC address index to register.
> + *
> + * @return
> + *   0 on success, errno value on failure.
> + */
> +static int
> +rxq_mac_addr_add(struct rxq *rxq, unsigned int mac_index)
> +{
> +       struct priv *priv = rxq->priv;
> +       const uint8_t (*mac)[ETHER_ADDR_LEN] =
> +               (const uint8_t (*)[ETHER_ADDR_LEN])
> +               priv->mac[mac_index].addr_bytes;
> +       unsigned int vlans = 0;
> +       unsigned int specs = 0;
> +       unsigned int i, j;
> +       struct ibv_exp_flow *flow;
> +
> +       assert(mac_index < elemof(priv->mac));
> +       if (BITFIELD_ISSET(rxq->mac_configured, mac_index))
> +               rxq_mac_addr_del(rxq, mac_index);
> +       /* Number of configured VLANs. */
> +       for (i = 0; (i != elemof(priv->vlan_filter)); ++i)
> +               if (priv->vlan_filter[i].enabled)
> +                       ++vlans;
> +       specs = (vlans ? vlans : 1);
> +
> +       /* Allocate flow specification on the stack. */
> +       struct ibv_exp_flow_attr data
> +               [1 +
> +                (sizeof(struct ibv_exp_flow_spec_eth[specs]) /
> +                 sizeof(struct ibv_exp_flow_attr)) +
> +                !!(sizeof(struct ibv_exp_flow_spec_eth[specs]) %
> +                   sizeof(struct ibv_exp_flow_attr))];
> +       struct ibv_exp_flow_attr *attr = (void *)&data[0];
> +       struct ibv_exp_flow_spec_eth *spec = (void *)&data[1];
> +
> +       /*
> +        * No padding must be inserted by the compiler between attr and spec.
> +        * This layout is expected by libibverbs.
> +        */
> +       assert(((uint8_t *)attr + sizeof(*attr)) == (uint8_t *)spec);
> +       *attr = (struct ibv_exp_flow_attr){
> +               .type = IBV_EXP_FLOW_ATTR_NORMAL,
> +               .num_of_specs = specs,
> +               .port = priv->port,
> +               .flags = 0
> +       };
> +       *spec = (struct ibv_exp_flow_spec_eth){
> +               .type = IBV_EXP_FLOW_SPEC_ETH,
> +               .size = sizeof(*spec),
> +               .val = {
> +                       .dst_mac = {
> +                               (*mac)[0], (*mac)[1], (*mac)[2],
> +                               (*mac)[3], (*mac)[4], (*mac)[5]
> +                       }
> +               },
> +               .mask = {
> +                       .dst_mac = "\xff\xff\xff\xff\xff\xff",
> +                       .vlan_tag = (vlans ? htons(0xfff) : 0)
> +               }
> +       };
> +       /* Fill VLAN specifications. */
> +       for (i = 0, j = 0; (i != elemof(priv->vlan_filter)); ++i) {
> +               if (!priv->vlan_filter[i].enabled)
> +                       continue;
> +               assert(j != vlans);
> +               if (j)
> +                       spec[j] = spec[0];
> +               spec[j].val.vlan_tag = htons(priv->vlan_filter[i].id);
> +               ++j;
> +       }
> +       DEBUG("%p: adding MAC address %02x:%02x:%02x:%02x:%02x:%02x index %u"
> +             " (%u VLAN(s) configured)",
> +             (void *)rxq,
> +             (*mac)[0], (*mac)[1], (*mac)[2], (*mac)[3], (*mac)[4], (*mac)[5],
> +             mac_index,
> +             vlans);
> +       /* Create related flow. */
> +       errno = 0;
> +       flow = ibv_exp_create_flow(rxq->qp, attr);
> +       if (flow == NULL) {
> +               int err = errno;
> +
> +               /* Flow creation failure is not fatal when in DMFS A0 mode.
> +                * Ignore error if promiscuity is already enabled or can be
> +                * enabled. */
> +               if (priv->promisc_ok)
> +                       return 0;
> +               if ((rxq->promisc_flow != NULL) ||
> +                   (rxq_promiscuous_enable(rxq) == 0)) {
> +                       if (rxq->promisc_flow != NULL)
> +                               rxq_promiscuous_disable(rxq);
> +                       WARN("cannot configure normal flow but promiscuous"
> +                            " mode is fine, assuming promiscuous optimization"
> +                            " is enabled"
> +                            " (options mlx4_core log_num_mgm_entry_size=-7)");
> +                       priv->promisc_ok = 1;
> +                       return 0;
> +               }
> +               errno = err;
> +               /* It's not clear whether errno is always set in this case. */
> +               ERROR("%p: flow configuration failed, errno=%d: %s",
> +                     (void *)rxq, errno,
> +                     (errno ? strerror(errno) : "Unknown error"));
> +               if (errno)
> +                       return errno;
> +               return EINVAL;
> +       }
> +       assert(rxq->mac_flow[mac_index] == NULL);
> +       rxq->mac_flow[mac_index] = flow;
> +       BITFIELD_SET(rxq->mac_configured, mac_index);
> +       return 0;
> +}
> +
> +/**
> + * Register all MAC addresses in a RX queue.
> + *
> + * @param rxq
> + *   Pointer to RX queue structure.
> + *
> + * @return
> + *   0 on success, errno value on failure.
> + */
> +static int
> +rxq_mac_addrs_add(struct rxq *rxq)
> +{
> +       struct priv *priv = rxq->priv;
> +       unsigned int i;
> +       int ret;
> +
> +       for (i = 0; (i != elemof(priv->mac)); ++i) {
> +               if (!BITFIELD_ISSET(priv->mac_configured, i))
> +                       continue;
> +               ret = rxq_mac_addr_add(rxq, i);
> +               if (!ret)
> +                       continue;
> +               /* Failure, rollback. */
> +               while (i != 0)
> +                       rxq_mac_addr_del(rxq, --i);
> +               assert(ret > 0);
> +               return ret;
> +       }
> +       return 0;
> +}
> +
> +/**
> + * Unregister a MAC address.
> + *
> + * In RSS mode, the MAC address is unregistered from the parent queue,
> + * otherwise it is unregistered from each queue directly.
> + *
> + * @param priv
> + *   Pointer to private structure.
> + * @param mac_index
> + *   MAC address index.
> + */
> +static void
> +priv_mac_addr_del(struct priv *priv, unsigned int mac_index)
> +{
> +       unsigned int i;
> +
> +       assert(mac_index < elemof(priv->mac));
> +       if (!BITFIELD_ISSET(priv->mac_configured, mac_index))
> +               return;
> +       if (priv->rss) {
> +               rxq_mac_addr_del(&priv->rxq_parent, mac_index);
> +               goto end;
> +       }
> +       for (i = 0; (i != priv->dev->data->nb_rx_queues); ++i)
> +               rxq_mac_addr_del((*priv->rxqs)[i], mac_index);
> +end:
> +       BITFIELD_RESET(priv->mac_configured, mac_index);
> +}
> +
> +/**
> + * Register a MAC address.
> + *
> + * In RSS mode, the MAC address is registered in the parent queue,
> + * otherwise it is registered in each queue directly.
> + *
> + * @param priv
> + *   Pointer to private structure.
> + * @param mac_index
> + *   MAC address index to use.
> + * @param mac
> + *   MAC address to register.
> + *
> + * @return
> + *   0 on success, errno value on failure.
> + */
> +static int
> +priv_mac_addr_add(struct priv *priv, unsigned int mac_index,
> +                 const uint8_t (*mac)[ETHER_ADDR_LEN])
> +{
> +       unsigned int i;
> +       int ret;
> +
> +       assert(mac_index < elemof(priv->mac));
> +       /* First, make sure this address isn't already configured. */
> +       for (i = 0; (i != elemof(priv->mac)); ++i) {
> +               /* Skip this index, it's going to be reconfigured. */
> +               if (i == mac_index)
> +                       continue;
> +               if (!BITFIELD_ISSET(priv->mac_configured, i))
> +                       continue;
> +               if (memcmp(priv->mac[i].addr_bytes, *mac, sizeof(*mac)))
> +                       continue;
> +               /* Address already configured elsewhere, return with error. */
> +               return EADDRINUSE;
> +       }
> +       if (BITFIELD_ISSET(priv->mac_configured, mac_index))
> +               priv_mac_addr_del(priv, mac_index);
> +       priv->mac[mac_index] = (struct ether_addr){
> +               {
> +                       (*mac)[0], (*mac)[1], (*mac)[2],
> +                       (*mac)[3], (*mac)[4], (*mac)[5]
> +               }
> +       };
> +       /* If device isn't started, this is all we need to do. */
> +       if (!priv->started) {
> +#ifndef NDEBUG
> +               /* Verify that all queues have this index disabled. */
> +               for (i = 0; (i != priv->rxqs_n); ++i) {
> +                       if ((*priv->rxqs)[i] == NULL)
> +                               continue;
> +                       assert(!BITFIELD_ISSET
> +                              ((*priv->rxqs)[i]->mac_configured, mac_index));
> +               }
> +#endif
> +               goto end;
> +       }
> +       if (priv->rss) {
> +               ret = rxq_mac_addr_add(&priv->rxq_parent, mac_index);
> +               if (ret)
> +                       return ret;
> +               goto end;
> +       }
> +       for (i = 0; (i != priv->rxqs_n); ++i) {
> +               if ((*priv->rxqs)[i] == NULL)
> +                       continue;
> +               ret = rxq_mac_addr_add((*priv->rxqs)[i], mac_index);
> +               if (!ret)
> +                       continue;
> +               /* Failure, rollback. */
> +               while (i != 0)
> +                       if ((*priv->rxqs)[(--i)] != NULL)
> +                               rxq_mac_addr_del((*priv->rxqs)[i], mac_index);
> +               return ret;
> +       }
> +end:
> +       BITFIELD_SET(priv->mac_configured, mac_index);
> +       return 0;
> +}
> +
> +/**
> + * Enable allmulti mode in a RX queue.
> + *
> + * @param rxq
> + *   Pointer to RX queue structure.
> + *
> + * @return
> + *   0 on success, errno value on failure.
> + */
> +static int
> +rxq_allmulticast_enable(struct rxq *rxq)
> +{
> +       struct ibv_exp_flow *flow;
> +       struct ibv_exp_flow_attr attr = {
> +               .type = IBV_EXP_FLOW_ATTR_MC_DEFAULT,
> +               .num_of_specs = 0,
> +               .port = rxq->priv->port,
> +               .flags = 0
> +       };
> +
> +       DEBUG("%p: enabling allmulticast mode", (void *)rxq);
> +       if (rxq->allmulti_flow != NULL)
> +               return EBUSY;
> +       errno = 0;
> +       flow = ibv_exp_create_flow(rxq->qp, &attr);
> +       if (flow == NULL) {
> +               /* It's not clear whether errno is always set in this case. */
> +               ERROR("%p: flow configuration failed, errno=%d: %s",
> +                     (void *)rxq, errno,
> +                     (errno ? strerror(errno) : "Unknown error"));
> +               if (errno)
> +                       return errno;
> +               return EINVAL;
> +       }
> +       rxq->allmulti_flow = flow;
> +       DEBUG("%p: allmulticast mode enabled", (void *)rxq);
> +       return 0;
> +}
> +
> +/**
> + * Disable allmulti mode in a RX queue.
> + *
> + * @param rxq
> + *   Pointer to RX queue structure.
> + */
> +static void
> +rxq_allmulticast_disable(struct rxq *rxq)
> +{
> +       DEBUG("%p: disabling allmulticast mode", (void *)rxq);
> +       if (rxq->allmulti_flow == NULL)
> +               return;
> +       claim_zero(ibv_exp_destroy_flow(rxq->allmulti_flow));
> +       rxq->allmulti_flow = NULL;
> +       DEBUG("%p: allmulticast mode disabled", (void *)rxq);
> +}
> +
> +/**
> + * Enable promiscuous mode in a RX queue.
> + *
> + * @param rxq
> + *   Pointer to RX queue structure.
> + *
> + * @return
> + *   0 on success, errno value on failure.
> + */
> +static int
> +rxq_promiscuous_enable(struct rxq *rxq)
> +{
> +       struct ibv_exp_flow *flow;
> +       struct ibv_exp_flow_attr attr = {
> +               .type = IBV_EXP_FLOW_ATTR_ALL_DEFAULT,
> +               .num_of_specs = 0,
> +               .port = rxq->priv->port,
> +               .flags = 0
> +       };
> +
> +       if (rxq->priv->vf)
> +               return 0;
> +       DEBUG("%p: enabling promiscuous mode", (void *)rxq);
> +       if (rxq->promisc_flow != NULL)
> +               return EBUSY;
> +       errno = 0;
> +       flow = ibv_exp_create_flow(rxq->qp, &attr);
> +       if (flow == NULL) {
> +               /* It's not clear whether errno is always set in this case. */
> +               ERROR("%p: flow configuration failed, errno=%d: %s",
> +                     (void *)rxq, errno,
> +                     (errno ? strerror(errno) : "Unknown error"));
> +               if (errno)
> +                       return errno;
> +               return EINVAL;
> +       }
> +       rxq->promisc_flow = flow;
> +       DEBUG("%p: promiscuous mode enabled", (void *)rxq);
> +       return 0;
> +}
> +
> +/**
> + * Disable promiscuous mode in a RX queue.
> + *
> + * @param rxq
> + *   Pointer to RX queue structure.
> + */
> +static void
> +rxq_promiscuous_disable(struct rxq *rxq)
> +{
> +       if (rxq->priv->vf)
> +               return;
> +       DEBUG("%p: disabling promiscuous mode", (void *)rxq);
> +       if (rxq->promisc_flow == NULL)
> +               return;
> +       claim_zero(ibv_exp_destroy_flow(rxq->promisc_flow));
> +       rxq->promisc_flow = NULL;
> +       DEBUG("%p: promiscuous mode disabled", (void *)rxq);
> +}
> +
> +/**
> + * Clean up a RX queue.
> + *
> + * Destroy objects, free allocated memory and reset the structure for reuse.
> + *
> + * @param rxq
> + *   Pointer to RX queue structure.
> + */
> +static void
> +rxq_cleanup(struct rxq *rxq)
> +{
> +       DEBUG("cleaning up %p", (void *)rxq);
> +       if (rxq->sp)
> +               rxq_free_elts_sp(rxq);
> +       else
> +               rxq_free_elts(rxq);
> +       if (rxq->qp != NULL) {
> +               rxq_promiscuous_disable(rxq);
> +               rxq_allmulticast_disable(rxq);
> +               rxq_mac_addrs_del(rxq);
> +               claim_zero(ibv_destroy_qp(rxq->qp));
> +       }
> +       if (rxq->cq != NULL)
> +               claim_zero(ibv_destroy_cq(rxq->cq));
> +       if (rxq->mr != NULL)
> +               claim_zero(ibv_dereg_mr(rxq->mr));
> +       memset(rxq, 0, sizeof(*rxq));
> +}
> +
> +static uint16_t
> +mlx4_rx_burst(void *dpdk_rxq, struct rte_mbuf **pkts, uint16_t pkts_n);
> +
> +/**
> + * DPDK callback for RX with scattered packets support.
> + *
> + * @param dpdk_rxq
> + *   Generic pointer to RX queue structure.
> + * @param[out] pkts
> + *   Array to store received packets.
> + * @param pkts_n
> + *   Maximum number of packets in array.
> + *
> + * @return
> + *   Number of packets successfully received (<= pkts_n).
> + */
> +static uint16_t
> +mlx4_rx_burst_sp(void *dpdk_rxq, struct rte_mbuf **pkts, uint16_t pkts_n)
> +{
> +       struct rxq *rxq = (struct rxq *)dpdk_rxq;
> +       struct rxq_elt_sp (*elts)[rxq->elts_n] = rxq->elts.sp;
> +       struct ibv_wc wcs[pkts_n];
> +       struct ibv_recv_wr head;
> +       struct ibv_recv_wr **next = &head.next;
> +       struct ibv_recv_wr *bad_wr;
> +       int ret = 0;
> +       int wcs_n;
> +       int i;
> +
> +       if (unlikely(!rxq->sp))
> +               return mlx4_rx_burst(dpdk_rxq, pkts, pkts_n);
> +       if (unlikely(elts == NULL)) /* See RTE_DEV_CMD_SET_MTU. */
> +               return 0;
> +       wcs_n = ibv_poll_cq(rxq->cq, pkts_n, wcs);
> +       if (unlikely(wcs_n == 0))
> +               return 0;
> +       if (unlikely(wcs_n < 0)) {
> +               DEBUG("rxq=%p, ibv_poll_cq() failed (wc_n=%d)",
> +                     (void *)rxq, wcs_n);
> +               return 0;
> +       }
> +       assert(wcs_n <= (int)pkts_n);
> +       /* For each work completion. */
> +       for (i = 0; (i != wcs_n); ++i) {
> +               struct ibv_wc *wc = &wcs[i];
> +               uint64_t wr_id = wc->wr_id;
> +               uint32_t len = wc->byte_len;
> +               struct rxq_elt_sp *elt = &(*elts)[wr_id];
> +               struct ibv_recv_wr *wr = &elt->wr;
> +               struct rte_mbuf *pkt_buf = NULL; /* Buffer returned in pkts. */
> +               struct rte_mbuf **pkt_buf_next = &pkt_buf;
> +               unsigned int seg_headroom = RTE_PKTMBUF_HEADROOM;
> +               unsigned int j = 0;
> +
> +               /* Sanity checks. */
> +               assert(wr_id < rxq->elts_n);
> +               assert(wr_id == wr->wr_id);
> +               assert(wr->sg_list == elt->sges);
> +               assert(wr->num_sge == elemof(elt->sges));
> +               /* Link completed WRs together for repost. */
> +               *next = wr;
> +               next = &wr->next;
> +               if (unlikely(wc->status != IBV_WC_SUCCESS)) {
> +                       /* Whatever, just repost the offending WR. */
> +                       DEBUG("rxq=%p, wr_id=%" PRIu64 ": bad work completion"
> +                             " status (%d): %s",
> +                             (void *)rxq, wc->wr_id, wc->status,
> +                             ibv_wc_status_str(wc->status));
> +#ifdef MLX4_PMD_SOFT_COUNTERS
> +                       /* Increase dropped packets counter. */
> +                       ++rxq->stats.idropped;
> +#endif
> +                       goto repost;
> +               }
> +               /*
> +                * Replace spent segments with new ones, concatenate and
> +                * return them as pkt_buf.
> +                */
> +               while (1) {
> +                       struct ibv_sge *sge = &elt->sges[j];
> +                       struct rte_mbuf *seg = elt->bufs[j];
> +                       struct rte_mbuf *rep;
> +                       unsigned int seg_tailroom;
> +
> +                       /*
> +                        * Fetch initial bytes of packet descriptor into a
> +                        * cacheline while allocating rep.
> +                        */
> +                       rte_prefetch0(seg);
> +                       rep = __rte_mbuf_raw_alloc(rxq->mp);
> +                       if (unlikely(rep == NULL)) {
> +                               /*
> +                                * Unable to allocate a replacement mbuf,
> +                                * repost WR.
> +                                */
> +                               DEBUG("rxq=%p, wr_id=%" PRIu64 ":"
> +                                     " can't allocate a new mbuf",
> +                                     (void *)rxq, wr_id);
> +                               if (pkt_buf != NULL)
> +                                       rte_pktmbuf_free(pkt_buf);
> +                               /* Increase out of memory counters. */
> +                               ++rxq->stats.rx_nombuf;
> +                               ++rxq->priv->dev->data->rx_mbuf_alloc_failed;
> +                               goto repost;
> +                       }
> +#ifndef NDEBUG
> +                       /* Poison user-modifiable fields in rep. */
> +                       NEXT(rep) = (void *)((uintptr_t)-1);
> +                       SET_DATA_OFF(rep, 0xdead);
> +                       DATA_LEN(rep) = 0xd00d;
> +                       PKT_LEN(rep) = 0xdeadd00d;
> +                       NB_SEGS(rep) = 0x2a;
> +                       PORT(rep) = 0x2a;
> +                       rep->ol_flags = -1;
> +#endif
> +                       assert(rep->buf_len == seg->buf_len);
> +                       assert(rep->buf_len == rxq->mb_len);
> +                       /* Reconfigure sge to use rep instead of seg. */
> +                       assert(sge->lkey == rxq->mr->lkey);
> +                       sge->addr = ((uintptr_t)rep->buf_addr + seg_headroom);
> +                       elt->bufs[j] = rep;
> +                       ++j;
> +                       /* Update pkt_buf if it's the first segment, or link
> +                        * seg to the previous one and update pkt_buf_next. */
> +                       *pkt_buf_next = seg;
> +                       pkt_buf_next = &NEXT(seg);
> +                       /* Update seg information. */
> +                       seg_tailroom = (seg->buf_len - seg_headroom);
> +                       assert(sge->length == seg_tailroom);
> +                       SET_DATA_OFF(seg, seg_headroom);
> +                       if (likely(len <= seg_tailroom)) {
> +                               /* Last segment. */
> +                               DATA_LEN(seg) = len;
> +                               PKT_LEN(seg) = len;
> +                               /* Sanity check. */
> +                               assert(rte_pktmbuf_headroom(seg) ==
> +                                      seg_headroom);
> +                               assert(rte_pktmbuf_tailroom(seg) ==
> +                                      (seg_tailroom - len));
> +                               break;
> +                       }
> +                       DATA_LEN(seg) = seg_tailroom;
> +                       PKT_LEN(seg) = seg_tailroom;
> +                       /* Sanity check. */
> +                       assert(rte_pktmbuf_headroom(seg) == seg_headroom);
> +                       assert(rte_pktmbuf_tailroom(seg) == 0);
> +                       /* Fix len and clear headroom for next segments. */
> +                       len -= seg_tailroom;
> +                       seg_headroom = 0;
> +               }
> +               /* Update head and tail segments. */
> +               *pkt_buf_next = NULL;
> +               assert(pkt_buf != NULL);
> +               assert(j != 0);
> +               NB_SEGS(pkt_buf) = j;
> +               PORT(pkt_buf) = rxq->port_id;
> +               PKT_LEN(pkt_buf) = wc->byte_len;
> +               pkt_buf->ol_flags = 0;
> +
> +               /* Return packet. */
> +               *(pkts++) = pkt_buf;
> +               ++ret;
> +#ifdef MLX4_PMD_SOFT_COUNTERS
> +               /* Increase bytes counter. */
> +               rxq->stats.ibytes += wc->byte_len;
> +#endif
> +repost:
> +               continue;
> +       }
> +       *next = NULL;
> +       /* Repost WRs. */
> +#ifdef DEBUG_RECV
> +       DEBUG("%p: reposting %d WRs starting from %" PRIu64 " (%p)",
> +             (void *)rxq, wcs_n, wcs[0].wr_id, (void *)head.next);
> +#endif
> +       i = ibv_post_recv(rxq->qp, head.next, &bad_wr);
> +       if (unlikely(i)) {
> +               /* Inability to repost WRs is fatal. */
> +               DEBUG("%p: ibv_post_recv(): failed for WR %p: %s",
> +                     (void *)rxq->priv,
> +                     (void *)bad_wr,
> +                     strerror(i));
> +               abort();
> +       }
> +#ifdef MLX4_PMD_SOFT_COUNTERS
> +       /* Increase packets counter. */
> +       rxq->stats.ipackets += ret;
> +#endif
> +       return ret;
> +}
> +
> +/**
> + * DPDK callback for RX.
> + *
> + * The following function is the same as mlx4_rx_burst_sp(), except it doesn't
> + * manage scattered packets. Improves performance when MRU is lower than the
> + * size of the first segment.
> + *
> + * @param dpdk_rxq
> + *   Generic pointer to RX queue structure.
> + * @param[out] pkts
> + *   Array to store received packets.
> + * @param pkts_n
> + *   Maximum number of packets in array.
> + *
> + * @return
> + *   Number of packets successfully received (<= pkts_n).
> + */
> +static uint16_t
> +mlx4_rx_burst(void *dpdk_rxq, struct rte_mbuf **pkts, uint16_t pkts_n)
> +{
> +       struct rxq *rxq = (struct rxq *)dpdk_rxq;
> +       struct rxq_elt (*elts)[rxq->elts_n] = rxq->elts.no_sp;
> +       struct ibv_wc wcs[pkts_n];
> +       struct ibv_recv_wr head;
> +       struct ibv_recv_wr **next = &head.next;
> +       struct ibv_recv_wr *bad_wr;
> +       int ret = 0;
> +       int wcs_n;
> +       int i;
> +
> +       if (unlikely(rxq->sp))
> +               return mlx4_rx_burst_sp(dpdk_rxq, pkts, pkts_n);
> +       wcs_n = ibv_poll_cq(rxq->cq, pkts_n, wcs);
> +       if (unlikely(wcs_n == 0))
> +               return 0;
> +       if (unlikely(wcs_n < 0)) {
> +               DEBUG("rxq=%p, ibv_poll_cq() failed (wc_n=%d)",
> +                     (void *)rxq, wcs_n);
> +               return 0;
> +       }
> +       assert(wcs_n <= (int)pkts_n);
> +       /* For each work completion. */
> +       for (i = 0; (i != wcs_n); ++i) {
> +               struct ibv_wc *wc = &wcs[i];
> +               uint64_t wr_id = wc->wr_id;
> +               uint32_t len = wc->byte_len;
> +               struct rxq_elt *elt = &(*elts)[WR_ID(wr_id).id];
> +               struct ibv_recv_wr *wr = &elt->wr;
> +               struct rte_mbuf *seg =
> +                       (void *)(elt->sge.addr - WR_ID(wr_id).offset);
> +               struct rte_mbuf *rep;
> +
> +               /* Sanity checks. */
> +               assert(WR_ID(wr_id).id < rxq->elts_n);
> +               assert(wr_id == wr->wr_id);
> +               assert(wr->sg_list == &elt->sge);
> +               assert(wr->num_sge == 1);
> +               /* Link completed WRs together for repost. */
> +               *next = wr;
> +               next = &wr->next;
> +               if (unlikely(wc->status != IBV_WC_SUCCESS)) {
> +                       /* Whatever, just repost the offending WR. */
> +                       DEBUG("rxq=%p, wr_id=%" PRIu32 ": bad work completion"
> +                             " status (%d): %s",
> +                             (void *)rxq, WR_ID(wr_id).id, wc->status,
> +                             ibv_wc_status_str(wc->status));
> +#ifdef MLX4_PMD_SOFT_COUNTERS
> +                       /* Increase dropped packets counter. */
> +                       ++rxq->stats.idropped;
> +#endif
> +                       goto repost;
> +               }
> +               /*
> +                * Fetch initial bytes of packet descriptor into a
> +                * cacheline while allocating rep.
> +                */
> +               rte_prefetch0(seg);
> +               rep = __rte_mbuf_raw_alloc(rxq->mp);
> +               if (unlikely(rep == NULL)) {
> +                       /*
> +                        * Unable to allocate a replacement mbuf,
> +                        * repost WR.
> +                        */
> +                       DEBUG("rxq=%p, wr_id=%" PRIu32 ":"
> +                             " can't allocate a new mbuf",
> +                             (void *)rxq, WR_ID(wr_id).id);
> +                       /* Increase out of memory counters. */
> +                       ++rxq->stats.rx_nombuf;
> +                       ++rxq->priv->dev->data->rx_mbuf_alloc_failed;
> +                       goto repost;
> +               }
> +
> +               /* Reconfigure sge to use rep instead of seg. */
> +               elt->sge.addr = (uintptr_t)rep->buf_addr + RTE_PKTMBUF_HEADROOM;
> +               assert(elt->sge.lkey == rxq->mr->lkey);
> +               WR_ID(wr->wr_id).offset =
> +                       (((uintptr_t)rep->buf_addr + RTE_PKTMBUF_HEADROOM) -
> +                        (uintptr_t)rep);
> +               assert(WR_ID(wr->wr_id).id == WR_ID(wr_id).id);
> +
> +               /* Update seg information. */
> +               SET_DATA_OFF(seg, RTE_PKTMBUF_HEADROOM);
> +               NB_SEGS(seg) = 1;
> +               PORT(seg) = rxq->port_id;
> +               NEXT(seg) = NULL;
> +               PKT_LEN(seg) = len;
> +               DATA_LEN(seg) = len;
> +               seg->ol_flags = 0;
> +
> +               /* Return packet. */
> +               *(pkts++) = seg;
> +               ++ret;
> +#ifdef MLX4_PMD_SOFT_COUNTERS
> +               /* Increase bytes counter. */
> +               rxq->stats.ibytes += wc->byte_len;
> +#endif
> +repost:
> +               continue;
> +       }
> +       *next = NULL;
> +       /* Repost WRs. */
> +#ifdef DEBUG_RECV
> +       DEBUG("%p: reposting %d WRs starting from %" PRIu32 " (%p)",
> +             (void *)rxq, wcs_n, WR_ID(wcs[0].wr_id).id, (void *)head.next);
> +#endif
> +       i = ibv_post_recv(rxq->qp, head.next, &bad_wr);
> +       if (unlikely(i)) {
> +               /* Inability to repost WRs is fatal. */
> +               DEBUG("%p: ibv_post_recv(): failed for WR %p: %s",
> +                     (void *)rxq->priv,
> +                     (void *)bad_wr,
> +                     strerror(i));
> +               abort();
> +       }
> +#ifdef MLX4_PMD_SOFT_COUNTERS
> +       /* Increase packets counter. */
> +       rxq->stats.ipackets += ret;
> +#endif
> +       return ret;
> +}
> +
> +#ifdef INLINE_RECV
> +
> +/**
> + * Allocate a Queue Pair in case inline receive is supported.
> + *
> + * @param priv
> + *   Pointer to private structure.
> + * @param cq
> + *   Completion queue to associate with QP.
> + * @param desc
> + *   Number of descriptors in QP (hint only).
> + *
> + * @return
> + *   QP pointer or NULL in case of error.
> + */
> +static struct ibv_qp *
> +rxq_setup_qp(struct priv *priv, struct ibv_cq *cq, uint16_t desc)
> +{
> +       struct ibv_exp_qp_init_attr attr = {
> +               /* CQ to be associated with the send queue. */
> +               .send_cq = cq,
> +               /* CQ to be associated with the receive queue. */
> +               .recv_cq = cq,
> +               .max_inl_recv = priv->inl_recv_size,
> +               .cap = {
> +                       /* Max number of outstanding WRs. */
> +                       .max_recv_wr = ((priv->device_attr.max_qp_wr < desc) ?
> +                                       priv->device_attr.max_qp_wr :
> +                                       desc),
> +                       /* Max number of scatter/gather elements in a WR. */
> +                       .max_recv_sge = ((priv->device_attr.max_sge <
> +                                         MLX4_PMD_SGE_WR_N) ?
> +                                        priv->device_attr.max_sge :
> +                                        MLX4_PMD_SGE_WR_N),
> +               },
> +               .qp_type = IBV_QPT_RAW_PACKET,
> +               .pd = priv->pd
> +       };
> +
> +       attr.comp_mask = IBV_EXP_QP_INIT_ATTR_PD;
> +       attr.comp_mask |= IBV_EXP_QP_INIT_ATTR_INL_RECV;
> +
> +       return ibv_exp_create_qp(priv->ctx, &attr);
> +}
> +
> +#else /* INLINE_RECV */
> +
> +/**
> + * Allocate a Queue Pair.
> + *
> + * @param priv
> + *   Pointer to private structure.
> + * @param cq
> + *   Completion queue to associate with QP.
> + * @param desc
> + *   Number of descriptors in QP (hint only).
> + *
> + * @return
> + *   QP pointer or NULL in case of error.
> + */
> +static struct ibv_qp *
> +rxq_setup_qp(struct priv *priv, struct ibv_cq *cq, uint16_t desc)
> +{
> +       struct ibv_qp_init_attr attr = {
> +               /* CQ to be associated with the send queue. */
> +               .send_cq = cq,
> +               /* CQ to be associated with the receive queue. */
> +               .recv_cq = cq,
> +               .cap = {
> +                       /* Max number of outstanding WRs. */
> +                       .max_recv_wr = ((priv->device_attr.max_qp_wr < desc) ?
> +                                       priv->device_attr.max_qp_wr :
> +                                       desc),
> +                       /* Max number of scatter/gather elements in a WR. */
> +                       .max_recv_sge = ((priv->device_attr.max_sge <
> +                                         MLX4_PMD_SGE_WR_N) ?
> +                                        priv->device_attr.max_sge :
> +                                        MLX4_PMD_SGE_WR_N),
> +               },
> +               .qp_type = IBV_QPT_RAW_PACKET
> +       };
> +
> +       return ibv_create_qp(priv->pd, &attr);
> +}
> +
> +#endif /* INLINE_RECV */
> +
> +#ifdef RSS_SUPPORT
> +
> +/**
> + * Allocate a RSS Queue Pair.
> + *
> + * @param priv
> + *   Pointer to private structure.
> + * @param cq
> + *   Completion queue to associate with QP.
> + * @param desc
> + *   Number of descriptors in QP (hint only).
> + * @param parent
> + *   If nonzero, create a parent QP, otherwise a child.
> + *
> + * @return
> + *   QP pointer or NULL in case of error.
> + */
> +static struct ibv_qp *
> +rxq_setup_qp_rss(struct priv *priv, struct ibv_cq *cq, uint16_t desc,
> +                int parent)
> +{
> +       struct ibv_exp_qp_init_attr attr = {
> +               /* CQ to be associated with the send queue. */
> +               .send_cq = cq,
> +               /* CQ to be associated with the receive queue. */
> +               .recv_cq = cq,
> +#ifdef INLINE_RECV
> +               .max_inl_recv = priv->inl_recv_size,
> +#endif
> +               .cap = {
> +                       /* Max number of outstanding WRs. */
> +                       .max_recv_wr = ((priv->device_attr.max_qp_wr < desc) ?
> +                                       priv->device_attr.max_qp_wr :
> +                                       desc),
> +                       /* Max number of scatter/gather elements in a WR. */
> +                       .max_recv_sge = ((priv->device_attr.max_sge <
> +                                         MLX4_PMD_SGE_WR_N) ?
> +                                        priv->device_attr.max_sge :
> +                                        MLX4_PMD_SGE_WR_N),
> +               },
> +               .qp_type = IBV_QPT_RAW_PACKET,
> +               .comp_mask = (IBV_EXP_QP_INIT_ATTR_PD |
> +                             IBV_EXP_QP_INIT_ATTR_QPG),
> +               .pd = priv->pd
> +       };
> +
> +#ifdef INLINE_RECV
> +       attr.comp_mask |= IBV_EXP_QP_INIT_ATTR_INL_RECV;
> +#endif
> +       if (parent) {
> +               attr.qpg.qpg_type = IBV_EXP_QPG_PARENT;
> +               /* TSS isn't necessary. */
> +               attr.qpg.parent_attrib.tss_child_count = 0;
> +               attr.qpg.parent_attrib.rss_child_count = priv->rxqs_n;
> +               DEBUG("initializing parent RSS queue");
> +       } else {
> +               attr.qpg.qpg_type = IBV_EXP_QPG_CHILD_RX;
> +               attr.qpg.qpg_parent = priv->rxq_parent.qp;
> +               DEBUG("initializing child RSS queue");
> +       }
> +       return ibv_exp_create_qp(priv->ctx, &attr);
> +}
> +
> +#endif /* RSS_SUPPORT */
> +
> +/**
> + * Reconfigure a RX queue with new parameters.
> + *
> + * rxq_rehash() does not allocate mbufs, which, if not done from the right
> + * thread (such as a control thread), may corrupt the pool.
> + * In case of failure, the queue is left untouched.
> + *
> + * @param dev
> + *   Pointer to Ethernet device structure.
> + * @param rxq
> + *   RX queue pointer.
> + *
> + * @return
> + *   0 on success, errno value on failure.
> + */
> +static int
> +rxq_rehash(struct rte_eth_dev *dev, struct rxq *rxq)
> +{
> +       struct priv *priv = rxq->priv;
> +       struct rxq tmpl = *rxq;
> +       unsigned int mbuf_n;
> +       unsigned int desc_n;
> +       struct rte_mbuf **pool;
> +       unsigned int i, k;
> +       struct ibv_exp_qp_attr mod;
> +       struct ibv_recv_wr *bad_wr;
> +       int err;
> +       int parent = (rxq == &priv->rxq_parent);
> +
> +       if (parent) {
> +               ERROR("%p: cannot rehash parent queue %p",
> +                     (void *)dev, (void *)rxq);
> +               return EINVAL;
> +       }
> +       DEBUG("%p: rehashing queue %p", (void *)dev, (void *)rxq);
> +       /* Number of descriptors and mbufs currently allocated. */
> +       desc_n = (tmpl.elts_n * (tmpl.sp ? MLX4_PMD_SGE_WR_N : 1));
> +       mbuf_n = desc_n;
> +       /* Enable scattered packets support for this queue if necessary. */
> +       if ((dev->data->dev_conf.rxmode.jumbo_frame) &&
> +           (dev->data->dev_conf.rxmode.max_rx_pkt_len >
> +            (tmpl.mb_len - RTE_PKTMBUF_HEADROOM))) {
> +               tmpl.sp = 1;
> +               desc_n /= MLX4_PMD_SGE_WR_N;
> +       } else
> +               tmpl.sp = 0;
> +       DEBUG("%p: %s scattered packets support (%u WRs)",
> +             (void *)dev, (tmpl.sp ? "enabling" : "disabling"), desc_n);
> +       /* If scatter mode is the same as before, nothing to do. */
> +       if (tmpl.sp == rxq->sp) {
> +               DEBUG("%p: nothing to do", (void *)dev);
> +               return 0;
> +       }
> +       /* Remove attached flows if RSS is disabled (no parent queue). */
> +       if (!priv->rss) {
> +               rxq_allmulticast_disable(&tmpl);
> +               rxq_promiscuous_disable(&tmpl);
> +               rxq_mac_addrs_del(&tmpl);
> +               /* Update original queue in case of failure. */
> +               rxq->allmulti_flow = tmpl.allmulti_flow;
> +               rxq->promisc_flow = tmpl.promisc_flow;
> +               memcpy(rxq->mac_configured, tmpl.mac_configured,
> +                      sizeof(rxq->mac_configured));
> +               memcpy(rxq->mac_flow, tmpl.mac_flow, sizeof(rxq->mac_flow));
> +       }
> +       /* From now on, any failure will render the queue unusable.
> +        * Reinitialize QP. */
> +       mod = (struct ibv_exp_qp_attr){ .qp_state = IBV_QPS_RESET };
> +       err = ibv_exp_modify_qp(tmpl.qp, &mod, IBV_EXP_QP_STATE);
> +       if (err) {
> +               ERROR("%p: cannot reset QP: %s", (void *)dev, strerror(err));
> +               assert(err > 0);
> +               return err;
> +       }
> +       err = ibv_resize_cq(tmpl.cq, desc_n);
> +       if (err) {
> +               ERROR("%p: cannot resize CQ: %s", (void *)dev, strerror(err));
> +               assert(err > 0);
> +               return err;
> +       }
> +       mod = (struct ibv_exp_qp_attr){
> +               /* Move the QP to this state. */
> +               .qp_state = IBV_QPS_INIT,
> +               /* Primary port number. */
> +               .port_num = priv->port
> +       };
> +       err = ibv_exp_modify_qp(tmpl.qp, &mod,
> +                               (IBV_EXP_QP_STATE |
> +#ifdef RSS_SUPPORT
> +                                (parent ? IBV_EXP_QP_GROUP_RSS : 0) |
> +#endif /* RSS_SUPPORT */
> +                                IBV_EXP_QP_PORT));
> +       if (err) {
> +               ERROR("%p: QP state to IBV_QPS_INIT failed: %s",
> +                     (void *)dev, strerror(err));
> +               assert(err > 0);
> +               return err;
> +       };
> +       /* Reconfigure flows. Do not care for errors. */
> +       if (!priv->rss) {
> +               rxq_mac_addrs_add(&tmpl);
> +               if (priv->promisc)
> +                       rxq_promiscuous_enable(&tmpl);
> +               if (priv->allmulti)
> +                       rxq_allmulticast_enable(&tmpl);
> +               /* Update original queue in case of failure. */
> +               rxq->allmulti_flow = tmpl.allmulti_flow;
> +               rxq->promisc_flow = tmpl.promisc_flow;
> +               memcpy(rxq->mac_configured, tmpl.mac_configured,
> +                      sizeof(rxq->mac_configured));
> +               memcpy(rxq->mac_flow, tmpl.mac_flow, sizeof(rxq->mac_flow));
> +       }
> +       /* Allocate pool. */
> +       pool = rte_malloc(__func__, (mbuf_n * sizeof(*pool)), 0);
> +       if (pool == NULL) {
> +               ERROR("%p: cannot allocate memory", (void *)dev);
> +               return ENOBUFS;
> +       }
> +       /* Snatch mbufs from original queue. */
> +       k = 0;
> +       if (rxq->sp) {
> +               struct rxq_elt_sp (*elts)[rxq->elts_n] = rxq->elts.sp;
> +
> +               for (i = 0; (i != elemof(*elts)); ++i) {
> +                       struct rxq_elt_sp *elt = &(*elts)[i];
> +                       unsigned int j;
> +
> +                       for (j = 0; (j != elemof(elt->bufs)); ++j) {
> +                               assert(elt->bufs[j] != NULL);
> +                               pool[k++] = elt->bufs[j];
> +                       }
> +               }
> +       } else {
> +               struct rxq_elt (*elts)[rxq->elts_n] = rxq->elts.no_sp;
> +
> +               for (i = 0; (i != elemof(*elts)); ++i) {
> +                       struct rxq_elt *elt = &(*elts)[i];
> +                       struct rte_mbuf *buf = (void *)
> +                               (elt->sge.addr - WR_ID(elt->wr.wr_id).offset);
> +
> +                       assert(WR_ID(elt->wr.wr_id).id == i);
> +                       pool[k++] = buf;
> +               }
> +       }
> +       assert(k == mbuf_n);
> +       tmpl.elts_n = 0;
> +       tmpl.elts.sp = NULL;
> +       assert((void *)&tmpl.elts.sp == (void *)&tmpl.elts.no_sp);
> +       err = ((tmpl.sp) ?
> +              rxq_alloc_elts_sp(&tmpl, desc_n, pool) :
> +              rxq_alloc_elts(&tmpl, desc_n, pool));
> +       if (err) {
> +               ERROR("%p: cannot reallocate WRs, aborting", (void *)dev);
> +               rte_free(pool);
> +               assert(err > 0);
> +               return err;
> +       }
> +       assert(tmpl.elts_n == desc_n);
> +       assert(tmpl.elts.sp != NULL);
> +       rte_free(pool);
> +       /* Clean up original data. */
> +       rxq->elts_n = 0;
> +       rte_free(rxq->elts.sp);
> +       rxq->elts.sp = NULL;
> +       /* Post WRs. */
> +       err = ibv_post_recv(tmpl.qp,
> +                           (tmpl.sp ?
> +                            &(*tmpl.elts.sp)[0].wr :
> +                            &(*tmpl.elts.no_sp)[0].wr),
> +                           &bad_wr);
> +       if (err) {
> +               ERROR("%p: ibv_post_recv() failed for WR %p: %s",
> +                     (void *)dev,
> +                     (void *)bad_wr,
> +                     strerror(err));
> +               goto skip_rtr;
> +       }
> +       mod = (struct ibv_exp_qp_attr){
> +               .qp_state = IBV_QPS_RTR
> +       };
> +       err = ibv_exp_modify_qp(tmpl.qp, &mod, IBV_EXP_QP_STATE);
> +       if (err)
> +               ERROR("%p: QP state to IBV_QPS_RTR failed: %s",
> +                     (void *)dev, strerror(err));
> +skip_rtr:
> +       *rxq = tmpl;
> +       assert(err >= 0);
> +       return err;
> +}
> +
> +/**
> + * Configure a RX queue.
> + *
> + * @param dev
> + *   Pointer to Ethernet device structure.
> + * @param rxq
> + *   Pointer to RX queue structure.
> + * @param desc
> + *   Number of descriptors to configure in queue.
> + * @param socket
> + *   NUMA socket on which memory must be allocated.
> + * @param[in] conf
> + *   Thresholds parameters.
> + * @param mp
> + *   Memory pool for buffer allocations.
> + *
> + * @return
> + *   0 on success, errno value on failure.
> + */
> +static int
> +rxq_setup(struct rte_eth_dev *dev, struct rxq *rxq, uint16_t desc,
> +         unsigned int socket, const struct rte_eth_rxconf *conf,
> +         struct rte_mempool *mp)
> +{
> +       struct priv *priv = dev->data->dev_private;
> +       struct rxq tmpl = {
> +               .priv = priv,
> +               .mp = mp,
> +               .socket = socket
> +       };
> +       struct ibv_exp_qp_attr mod;
> +       struct ibv_recv_wr *bad_wr;
> +       struct rte_mbuf *buf;
> +       int ret = 0;
> +       int parent = (rxq == &priv->rxq_parent);
> +
> +       (void)conf; /* Thresholds configuration (ignored). */
> +       /*
> +        * If this is a parent queue, hardware must support RSS and
> +        * RSS must be enabled.
> +        */
> +       assert((!parent) || ((priv->hw_rss) && (priv->rss)));
> +       if (parent) {
> +               /* Even if unused, ibv_create_cq() requires at least one
> +                * descriptor. */
> +               desc = 1;
> +               goto skip_mr;
> +       }
> +       if ((desc == 0) || (desc % MLX4_PMD_SGE_WR_N)) {
> +               ERROR("%p: invalid number of RX descriptors (must be a"
> +                     " multiple of %d)", (void *)dev, desc);
> +               return EINVAL;
> +       }
> +       /* Get mbuf length. */
> +       buf = rte_pktmbuf_alloc(mp);
> +       if (buf == NULL) {
> +               ERROR("%p: unable to allocate mbuf", (void *)dev);
> +               return ENOMEM;
> +       }
> +       tmpl.mb_len = buf->buf_len;
> +       assert((rte_pktmbuf_headroom(buf) +
> +               rte_pktmbuf_tailroom(buf)) == tmpl.mb_len);
> +       assert(rte_pktmbuf_headroom(buf) == RTE_PKTMBUF_HEADROOM);
> +       rte_pktmbuf_free(buf);
> +       /* Enable scattered packets support for this queue if necessary. */
> +       if ((dev->data->dev_conf.rxmode.jumbo_frame) &&
> +           (dev->data->dev_conf.rxmode.max_rx_pkt_len >
> +            (tmpl.mb_len - RTE_PKTMBUF_HEADROOM))) {
> +               tmpl.sp = 1;
> +               desc /= MLX4_PMD_SGE_WR_N;
> +       }
> +       DEBUG("%p: %s scattered packets support (%u WRs)",
> +             (void *)dev, (tmpl.sp ? "enabling" : "disabling"), desc);
> +       /* Use the entire RX mempool as the memory region. */
> +       tmpl.mr = ibv_reg_mr(priv->pd,
> +                            (void *)mp->elt_va_start,
> +                            (mp->elt_va_end - mp->elt_va_start),
> +                            (IBV_ACCESS_LOCAL_WRITE |
> +                             IBV_ACCESS_REMOTE_WRITE));
> +       if (tmpl.mr == NULL) {
> +               ret = EINVAL;
> +               ERROR("%p: MR creation failure: %s",
> +                     (void *)dev, strerror(ret));
> +               goto error;
> +       }
> +skip_mr:
> +       tmpl.cq = ibv_create_cq(priv->ctx, desc, NULL, NULL, 0);
> +       if (tmpl.cq == NULL) {
> +               ret = ENOMEM;
> +               ERROR("%p: CQ creation failure: %s",
> +                     (void *)dev, strerror(ret));
> +               goto error;
> +       }
> +       DEBUG("priv->device_attr.max_qp_wr is %d",
> +             priv->device_attr.max_qp_wr);
> +       DEBUG("priv->device_attr.max_sge is %d",
> +             priv->device_attr.max_sge);
> +#ifdef RSS_SUPPORT
> +       if (priv->rss)
> +               tmpl.qp = rxq_setup_qp_rss(priv, tmpl.cq, desc, parent);
> +       else
> +#endif /* RSS_SUPPORT */
> +               tmpl.qp = rxq_setup_qp(priv, tmpl.cq, desc);
> +       if (tmpl.qp == NULL) {
> +               ret = (errno ? errno : EINVAL);
> +               ERROR("%p: QP creation failure: %s",
> +                     (void *)dev, strerror(ret));
> +               goto error;
> +       }
> +       mod = (struct ibv_exp_qp_attr){
> +               /* Move the QP to this state. */
> +               .qp_state = IBV_QPS_INIT,
> +               /* Primary port number. */
> +               .port_num = priv->port
> +       };
> +       ret = ibv_exp_modify_qp(tmpl.qp, &mod,
> +                               (IBV_EXP_QP_STATE |
> +#ifdef RSS_SUPPORT
> +                                (parent ? IBV_EXP_QP_GROUP_RSS : 0) |
> +#endif /* RSS_SUPPORT */
> +                                IBV_EXP_QP_PORT));
> +       if (ret) {
> +               ERROR("%p: QP state to IBV_QPS_INIT failed: %s",
> +                     (void *)dev, strerror(ret));
> +               goto error;
> +       }
> +       if ((parent) || (!priv->rss))  {
> +               /* Configure MAC and broadcast addresses. */
> +               ret = rxq_mac_addrs_add(&tmpl);
> +               if (ret) {
> +                       ERROR("%p: QP flow attachment failed: %s",
> +                             (void *)dev, strerror(ret));
> +                       goto error;
> +               }
> +       }
> +       /* Allocate descriptors for RX queues, except for the RSS parent. */
> +       if (parent)
> +               goto skip_alloc;
> +       if (tmpl.sp)
> +               ret = rxq_alloc_elts_sp(&tmpl, desc, NULL);
> +       else
> +               ret = rxq_alloc_elts(&tmpl, desc, NULL);
> +       if (ret) {
> +               ERROR("%p: RXQ allocation failed: %s",
> +                     (void *)dev, strerror(ret));
> +               goto error;
> +       }
> +       ret = ibv_post_recv(tmpl.qp,
> +                           (tmpl.sp ?
> +                            &(*tmpl.elts.sp)[0].wr :
> +                            &(*tmpl.elts.no_sp)[0].wr),
> +                           &bad_wr);
> +       if (ret) {
> +               ERROR("%p: ibv_post_recv() failed for WR %p: %s",
> +                     (void *)dev,
> +                     (void *)bad_wr,
> +                     strerror(ret));
> +               goto error;
> +       }
> +skip_alloc:
> +       mod = (struct ibv_exp_qp_attr){
> +               .qp_state = IBV_QPS_RTR
> +       };
> +       ret = ibv_exp_modify_qp(tmpl.qp, &mod, IBV_EXP_QP_STATE);
> +       if (ret) {
> +               ERROR("%p: QP state to IBV_QPS_RTR failed: %s",
> +                     (void *)dev, strerror(ret));
> +               goto error;
> +       }
> +       /* Save port ID. */
> +       tmpl.port_id = dev->data->port_id;
> +       DEBUG("%p: RTE port ID: %u", (void *)rxq, tmpl.port_id);
> +       /* Clean up rxq in case we're reinitializing it. */
> +       DEBUG("%p: cleaning-up old rxq just in case", (void *)rxq);
> +       rxq_cleanup(rxq);
> +       *rxq = tmpl;
> +       DEBUG("%p: rxq updated with %p", (void *)rxq, (void *)&tmpl);
> +       assert(ret == 0);
> +       return 0;
> +error:
> +       rxq_cleanup(&tmpl);
> +       assert(ret > 0);
> +       return ret;
> +}
> +
> +/**
> + * DPDK callback to configure a RX queue.
> + *
> + * @param dev
> + *   Pointer to Ethernet device structure.
> + * @param idx
> + *   RX queue index.
> + * @param desc
> + *   Number of descriptors to configure in queue.
> + * @param socket
> + *   NUMA socket on which memory must be allocated.
> + * @param[in] conf
> + *   Thresholds parameters.
> + * @param mp
> + *   Memory pool for buffer allocations.
> + *
> + * @return
> + *   0 on success, negative errno value on failure.
> + */
> +static int
> +mlx4_rx_queue_setup(struct rte_eth_dev *dev, uint16_t idx, uint16_t desc,
> +                   unsigned int socket, const struct rte_eth_rxconf *conf,
> +                   struct rte_mempool *mp)
> +{
> +       struct priv *priv = dev->data->dev_private;
> +       struct rxq *rxq = (*priv->rxqs)[idx];
> +       int ret;
> +
> +       priv_lock(priv);
> +       DEBUG("%p: configuring queue %u for %u descriptors",
> +             (void *)dev, idx, desc);
> +       if (idx >= priv->rxqs_n) {
> +               ERROR("%p: queue index out of range (%u >= %u)",
> +                     (void *)dev, idx, priv->rxqs_n);
> +               priv_unlock(priv);
> +               return -EOVERFLOW;
> +       }
> +       if (rxq != NULL) {
> +               DEBUG("%p: reusing already allocated queue index %u (%p)",
> +                     (void *)dev, idx, (void *)rxq);
> +               if (priv->started) {
> +                       priv_unlock(priv);
> +                       return -EEXIST;
> +               }
> +               (*priv->rxqs)[idx] = NULL;
> +               rxq_cleanup(rxq);
> +       } else {
> +               rxq = rte_calloc_socket("RXQ", 1, sizeof(*rxq), 0, socket);
> +               if (rxq == NULL) {
> +                       ERROR("%p: unable to allocate queue index %u",
> +                             (void *)dev, idx);
> +                       priv_unlock(priv);
> +                       return -ENOMEM;
> +               }
> +       }
> +       ret = rxq_setup(dev, rxq, desc, socket, conf, mp);
> +       if (ret)
> +               rte_free(rxq);
> +       else {
> +               rxq->stats.idx = idx;
> +               DEBUG("%p: adding RX queue %p to list",
> +                     (void *)dev, (void *)rxq);
> +               (*priv->rxqs)[idx] = rxq;
> +               /* Update receive callback. */
> +               if (rxq->sp)
> +                       dev->rx_pkt_burst = mlx4_rx_burst_sp;
> +               else
> +                       dev->rx_pkt_burst = mlx4_rx_burst;
> +       }
> +       priv_unlock(priv);
> +       return -ret;
> +}
> +
> +/**
> + * DPDK callback to release a RX queue.
> + *
> + * @param dpdk_rxq
> + *   Generic RX queue pointer.
> + */
> +static void
> +mlx4_rx_queue_release(void *dpdk_rxq)
> +{
> +       struct rxq *rxq = (struct rxq *)dpdk_rxq;
> +       struct priv *priv;
> +       unsigned int i;
> +
> +       if (rxq == NULL)
> +               return;
> +       priv = rxq->priv;
> +       priv_lock(priv);
> +       assert(rxq != &priv->rxq_parent);
> +       for (i = 0; (i != priv->rxqs_n); ++i)
> +               if ((*priv->rxqs)[i] == rxq) {
> +                       DEBUG("%p: removing RX queue %p from list",
> +                             (void *)priv->dev, (void *)rxq);
> +                       (*priv->rxqs)[i] = NULL;
> +                       break;
> +               }
> +       rxq_cleanup(rxq);
> +       rte_free(rxq);
> +       priv_unlock(priv);
> +}
> +
> +/**
> + * DPDK callback to start the device.
> + *
> + * Simulate device start by attaching all configured flows.
> + *
> + * @param dev
> + *   Pointer to Ethernet device structure.
> + *
> + * @return
> + *   0 on success, negative errno value on failure.
> + */
> +static int
> +mlx4_dev_start(struct rte_eth_dev *dev)
> +{
> +       struct priv *priv = dev->data->dev_private;
> +       unsigned int i = 0;
> +       unsigned int r;
> +       struct rxq *rxq;
> +
> +       priv_lock(priv);
> +       if (priv->started) {
> +               priv_unlock(priv);
> +               return 0;
> +       }
> +       DEBUG("%p: attaching configured flows to all RX queues", (void *)dev);
> +       priv->started = 1;
> +       if (priv->rss) {
> +               rxq = &priv->rxq_parent;
> +               r = 1;
> +       } else {
> +               rxq = (*priv->rxqs)[0];
> +               r = priv->rxqs_n;
> +       }
> +       /* Iterate only once when RSS is enabled. */
> +       do {
> +               int ret;
> +
> +               /* Ignore nonexistent RX queues. */
> +               if (rxq == NULL)
> +                       continue;
> +               ret = rxq_mac_addrs_add(rxq);
> +               if (!ret && priv->promisc)
> +                       ret = rxq_promiscuous_enable(rxq);
> +               if (!ret && priv->allmulti)
> +                       ret = rxq_allmulticast_enable(rxq);
> +               if (!ret)
> +                       continue;
> +               WARN("%p: QP flow attachment failed: %s",
> +                    (void *)dev, strerror(ret));
> +               /* Rollback. */
> +               while (i != 0) {
> +                       rxq = (*priv->rxqs)[--i];
> +                       if (rxq != NULL) {
> +                               rxq_allmulticast_disable(rxq);
> +                               rxq_promiscuous_disable(rxq);
> +                               rxq_mac_addrs_del(rxq);
> +                       }
> +               }
> +               priv->started = 0;
> +               return -ret;
> +       } while ((--r) && ((rxq = (*priv->rxqs)[++i]), i));
> +       priv_unlock(priv);
> +       return 0;
> +}
> +
> +/**
> + * DPDK callback to stop the device.
> + *
> + * Simulate device stop by detaching all configured flows.
> + *
> + * @param dev
> + *   Pointer to Ethernet device structure.
> + */
> +static void
> +mlx4_dev_stop(struct rte_eth_dev *dev)
> +{
> +       struct priv *priv = dev->data->dev_private;
> +       unsigned int i = 0;
> +       unsigned int r;
> +       struct rxq *rxq;
> +
> +       priv_lock(priv);
> +       if (!priv->started) {
> +               priv_unlock(priv);
> +               return;
> +       }
> +       DEBUG("%p: detaching flows from all RX queues", (void *)dev);
> +       priv->started = 0;
> +       if (priv->rss) {
> +               rxq = &priv->rxq_parent;
> +               r = 1;
> +       } else {
> +               rxq = (*priv->rxqs)[0];
> +               r = priv->rxqs_n;
> +       }
> +       /* Iterate only once when RSS is enabled. */
> +       do {
> +               /* Ignore nonexistent RX queues. */
> +               if (rxq == NULL)
> +                       continue;
> +               rxq_allmulticast_disable(rxq);
> +               rxq_promiscuous_disable(rxq);
> +               rxq_mac_addrs_del(rxq);
> +       } while ((--r) && ((rxq = (*priv->rxqs)[++i]), i));
> +       priv_unlock(priv);
> +}
> +
> +/**
> + * Dummy DPDK callback for TX.
> + *
> + * This function is used to temporarily replace the real callback during
> + * unsafe control operations on the queue, or in case of error.
> + *
> + * @param dpdk_txq
> + *   Generic pointer to TX queue structure.
> + * @param[in] pkts
> + *   Packets to transmit.
> + * @param pkts_n
> + *   Number of packets in array.
> + *
> + * @return
> + *   Number of packets successfully transmitted (<= pkts_n).
> + */
> +static uint16_t
> +removed_tx_burst(void *dpdk_txq, struct rte_mbuf **pkts, uint16_t pkts_n)
> +{
> +       (void)dpdk_txq;
> +       (void)pkts;
> +       (void)pkts_n;
> +       return 0;
> +}
> +
> +/**
> + * Dummy DPDK callback for RX.
> + *
> + * This function is used to temporarily replace the real callback during
> + * unsafe control operations on the queue, or in case of error.
> + *
> + * @param dpdk_rxq
> + *   Generic pointer to RX queue structure.
> + * @param[out] pkts
> + *   Array to store received packets.
> + * @param pkts_n
> + *   Maximum number of packets in array.
> + *
> + * @return
> + *   Number of packets successfully received (<= pkts_n).
> + */
> +static uint16_t
> +removed_rx_burst(void *dpdk_rxq, struct rte_mbuf **pkts, uint16_t pkts_n)
> +{
> +       (void)dpdk_rxq;
> +       (void)pkts;
> +       (void)pkts_n;
> +       return 0;
> +}
> +
> +/**
> + * DPDK callback to close the device.
> + *
> + * Destroy all queues and objects, free memory.
> + *
> + * @param dev
> + *   Pointer to Ethernet device structure.
> + */
> +static void
> +mlx4_dev_close(struct rte_eth_dev *dev)
> +{
> +       struct priv *priv = dev->data->dev_private;
> +       void *tmp;
> +       unsigned int i;
> +
> +       priv_lock(priv);
> +       DEBUG("%p: closing device \"%s\"",
> +             (void *)dev,
> +             ((priv->ctx != NULL) ? priv->ctx->device->name : ""));
> +       /* Prevent crashes when queues are still in use. This is unfortunately
> +        * still required for DPDK 1.3 because some programs (such as testpmd)
> +        * never release them before closing the device. */
> +       dev->rx_pkt_burst = removed_rx_burst;
> +       dev->tx_pkt_burst = removed_tx_burst;
> +       if (priv->rxqs != NULL) {
> +               /* XXX race condition if mlx4_rx_burst() is still running. */
> +               usleep(1000);
> +               for (i = 0; (i != priv->rxqs_n); ++i) {
> +                       tmp = (*priv->rxqs)[i];
> +                       if (tmp == NULL)
> +                               continue;
> +                       (*priv->rxqs)[i] = NULL;
> +                       rxq_cleanup(tmp);
> +                       rte_free(tmp);
> +               }
> +               priv->rxqs_n = 0;
> +               priv->rxqs = NULL;
> +       }
> +       if (priv->txqs != NULL) {
> +               /* XXX race condition if mlx4_tx_burst() is still running. */
> +               usleep(1000);
> +               for (i = 0; (i != priv->txqs_n); ++i) {
> +                       tmp = (*priv->txqs)[i];
> +                       if (tmp == NULL)
> +                               continue;
> +                       (*priv->txqs)[i] = NULL;
> +                       txq_cleanup(tmp);
> +                       rte_free(tmp);
> +               }
> +               priv->txqs_n = 0;
> +               priv->txqs = NULL;
> +       }
> +       if (priv->rss)
> +               rxq_cleanup(&priv->rxq_parent);
> +       if (priv->pd != NULL) {
> +               assert(priv->ctx != NULL);
> +               claim_zero(ibv_dealloc_pd(priv->pd));
> +               claim_zero(ibv_close_device(priv->ctx));
> +       } else
> +               assert(priv->ctx == NULL);
> +       priv_unlock(priv);
> +       memset(priv, 0, sizeof(*priv));
> +}
> +
> +/**
> + * DPDK callback to get information about the device.
> + *
> + * @param dev
> + *   Pointer to Ethernet device structure.
> + * @param[out] info
> + *   Info structure output buffer.
> + */
> +static void
> +mlx4_dev_infos_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *info)
> +{
> +       struct priv *priv = dev->data->dev_private;
> +       unsigned int max;
> +
> +       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 = elemof(priv->mac);
> +       priv_unlock(priv);
> +}
> +
> +/**
> + * DPDK callback to get device statistics.
> + *
> + * @param dev
> + *   Pointer to Ethernet device structure.
> + * @param[out] stats
> + *   Stats structure output buffer.
> + */
> +static void
> +mlx4_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
> +{
> +       struct priv *priv = dev->data->dev_private;
> +       struct rte_eth_stats tmp = {0};
> +       unsigned int i;
> +       unsigned int idx;
> +
> +       priv_lock(priv);
> +       /* Add software counters. */
> +       for (i = 0; (i != priv->rxqs_n); ++i) {
> +               struct rxq *rxq = (*priv->rxqs)[i];
> +
> +               if (rxq == NULL)
> +                       continue;
> +               idx = rxq->stats.idx;
> +               if (idx < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
> +#ifdef MLX4_PMD_SOFT_COUNTERS
> +                       tmp.q_ipackets[idx] += rxq->stats.ipackets;
> +                       tmp.q_ibytes[idx] += rxq->stats.ibytes;
> +#endif
> +                       tmp.q_errors[idx] += (rxq->stats.idropped +
> +                                             rxq->stats.rx_nombuf);
> +               }
> +#ifdef MLX4_PMD_SOFT_COUNTERS
> +               tmp.ipackets += rxq->stats.ipackets;
> +               tmp.ibytes += rxq->stats.ibytes;
> +#endif
> +               tmp.ierrors += rxq->stats.idropped;
> +               tmp.rx_nombuf += rxq->stats.rx_nombuf;
> +       }
> +       for (i = 0; (i != priv->txqs_n); ++i) {
> +               struct txq *txq = (*priv->txqs)[i];
> +
> +               if (txq == NULL)
> +                       continue;
> +               idx = txq->stats.idx;
> +               if (idx < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
> +#ifdef MLX4_PMD_SOFT_COUNTERS
> +                       tmp.q_opackets[idx] += txq->stats.opackets;
> +                       tmp.q_obytes[idx] += txq->stats.obytes;
> +#endif
> +                       tmp.q_errors[idx] += txq->stats.odropped;
> +               }
> +#ifdef MLX4_PMD_SOFT_COUNTERS
> +               tmp.opackets += txq->stats.opackets;
> +               tmp.obytes += txq->stats.obytes;
> +#endif
> +               tmp.oerrors += txq->stats.odropped;
> +       }
> +#ifndef MLX4_PMD_SOFT_COUNTERS
> +       /* FIXME: retrieve and add hardware counters. */
> +#endif
> +       *stats = tmp;
> +       priv_unlock(priv);
> +}
> +
> +/**
> + * DPDK callback to clear device statistics.
> + *
> + * @param dev
> + *   Pointer to Ethernet device structure.
> + */
> +static void
> +mlx4_stats_reset(struct rte_eth_dev *dev)
> +{
> +       struct priv *priv = dev->data->dev_private;
> +       unsigned int i;
> +       unsigned int idx;
> +
> +       priv_lock(priv);
> +       for (i = 0; (i != priv->rxqs_n); ++i) {
> +               if ((*priv->rxqs)[i] == NULL)
> +                       continue;
> +               idx = (*priv->rxqs)[i]->stats.idx;
> +               (*priv->rxqs)[i]->stats =
> +                       (struct mlx4_rxq_stats){ .idx = idx };
> +       }
> +       for (i = 0; (i != priv->txqs_n); ++i) {
> +               if ((*priv->txqs)[i] == NULL)
> +                       continue;
> +               idx = (*priv->rxqs)[i]->stats.idx;
> +               (*priv->txqs)[i]->stats =
> +                       (struct mlx4_txq_stats){ .idx = idx };
> +       }
> +#ifndef MLX4_PMD_SOFT_COUNTERS
> +       /* FIXME: reset hardware counters. */
> +#endif
> +       priv_unlock(priv);
> +}
> +
> +/**
> + * DPDK callback to remove a MAC address.
> + *
> + * @param dev
> + *   Pointer to Ethernet device structure.
> + * @param index
> + *   MAC address index.
> + */
> +static void
> +mlx4_mac_addr_remove(struct rte_eth_dev *dev, uint32_t index)
> +{
> +       struct priv *priv = dev->data->dev_private;
> +
> +       priv_lock(priv);
> +       DEBUG("%p: removing MAC address from index %" PRIu32,
> +             (void *)dev, index);
> +       if (index >= MLX4_MAX_MAC_ADDRESSES)
> +               goto end;
> +       /* Refuse to remove the broadcast address, this one is special. */
> +       if (!memcmp(priv->mac[index].addr_bytes, "\xff\xff\xff\xff\xff\xff",
> +                   ETHER_ADDR_LEN))
> +               goto end;
> +       priv_mac_addr_del(priv, index);
> +end:
> +       priv_unlock(priv);
> +}
> +
> +/**
> + * DPDK callback to add a MAC address.
> + *
> + * @param dev
> + *   Pointer to Ethernet device structure.
> + * @param mac_addr
> + *   MAC address to register.
> + * @param index
> + *   MAC address index.
> + * @param vmdq
> + *   VMDq pool index to associate address with (ignored).
> + */
> +static void
> +mlx4_mac_addr_add(struct rte_eth_dev *dev, struct ether_addr *mac_addr,
> +                 uint32_t index, uint32_t vmdq)
> +{
> +       struct priv *priv = dev->data->dev_private;
> +
> +       (void)vmdq;
> +       priv_lock(priv);
> +       DEBUG("%p: adding MAC address at index %" PRIu32,
> +             (void *)dev, index);
> +       if (index >= MLX4_MAX_MAC_ADDRESSES)
> +               goto end;
> +       /* Refuse to add the broadcast address, this one is special. */
> +       if (!memcmp(mac_addr->addr_bytes, "\xff\xff\xff\xff\xff\xff",
> +                   ETHER_ADDR_LEN))
> +               goto end;
> +       priv_mac_addr_add(priv, index,
> +                         (const uint8_t (*)[ETHER_ADDR_LEN])
> +                         mac_addr->addr_bytes);
> +end:
> +       priv_unlock(priv);
> +}
> +
> +/**
> + * DPDK callback to enable promiscuous mode.
> + *
> + * @param dev
> + *   Pointer to Ethernet device structure.
> + */
> +static void
> +mlx4_promiscuous_enable(struct rte_eth_dev *dev)
> +{
> +       struct priv *priv = dev->data->dev_private;
> +       unsigned int i;
> +       int ret;
> +
> +       priv_lock(priv);
> +       if (priv->promisc) {
> +               priv_unlock(priv);
> +               return;
> +       }
> +       /* If device isn't started, this is all we need to do. */
> +       if (!priv->started)
> +               goto end;
> +       if (priv->rss) {
> +               ret = rxq_promiscuous_enable(&priv->rxq_parent);
> +               if (ret) {
> +                       priv_unlock(priv);
> +                       return;
> +               }
> +               goto end;
> +       }
> +       for (i = 0; (i != priv->rxqs_n); ++i) {
> +               if ((*priv->rxqs)[i] == NULL)
> +                       continue;
> +               ret = rxq_promiscuous_enable((*priv->rxqs)[i]);
> +               if (!ret)
> +                       continue;
> +               /* Failure, rollback. */
> +               while (i != 0)
> +                       if ((*priv->rxqs)[--i] != NULL)
> +                               rxq_promiscuous_disable((*priv->rxqs)[i]);
> +               priv_unlock(priv);
> +               return;
> +       }
> +end:
> +       priv->promisc = 1;
> +       priv_unlock(priv);
> +}
> +
> +/**
> + * DPDK callback to disable promiscuous mode.
> + *
> + * @param dev
> + *   Pointer to Ethernet device structure.
> + */
> +static void
> +mlx4_promiscuous_disable(struct rte_eth_dev *dev)
> +{
> +       struct priv *priv = dev->data->dev_private;
> +       unsigned int i;
> +
> +       priv_lock(priv);
> +       if (!priv->promisc) {
> +               priv_unlock(priv);
> +               return;
> +       }
> +       if (priv->rss) {
> +               rxq_promiscuous_disable(&priv->rxq_parent);
> +               goto end;
> +       }
> +       for (i = 0; (i != priv->rxqs_n); ++i)
> +               if ((*priv->rxqs)[i] != NULL)
> +                       rxq_promiscuous_disable((*priv->rxqs)[i]);
> +end:
> +       priv->promisc = 0;
> +       priv_unlock(priv);
> +}
> +
> +/**
> + * DPDK callback to enable allmulti mode.
> + *
> + * @param dev
> + *   Pointer to Ethernet device structure.
> + */
> +static void
> +mlx4_allmulticast_enable(struct rte_eth_dev *dev)
> +{
> +       struct priv *priv = dev->data->dev_private;
> +       unsigned int i;
> +       int ret;
> +
> +       priv_lock(priv);
> +       if (priv->allmulti) {
> +               priv_unlock(priv);
> +               return;
> +       }
> +       /* If device isn't started, this is all we need to do. */
> +       if (!priv->started)
> +               goto end;
> +       if (priv->rss) {
> +               ret = rxq_allmulticast_enable(&priv->rxq_parent);
> +               if (ret) {
> +                       priv_unlock(priv);
> +                       return;
> +               }
> +               goto end;
> +       }
> +       for (i = 0; (i != priv->rxqs_n); ++i) {
> +               if ((*priv->rxqs)[i] == NULL)
> +                       continue;
> +               ret = rxq_allmulticast_enable((*priv->rxqs)[i]);
> +               if (!ret)
> +                       continue;
> +               /* Failure, rollback. */
> +               while (i != 0)
> +                       if ((*priv->rxqs)[--i] != NULL)
> +                               rxq_allmulticast_disable((*priv->rxqs)[i]);
> +               priv_unlock(priv);
> +               return;
> +       }
> +end:
> +       priv->allmulti = 1;
> +       priv_unlock(priv);
> +}
> +
> +/**
> + * DPDK callback to disable allmulti mode.
> + *
> + * @param dev
> + *   Pointer to Ethernet device structure.
> + */
> +static void
> +mlx4_allmulticast_disable(struct rte_eth_dev *dev)
> +{
> +       struct priv *priv = dev->data->dev_private;
> +       unsigned int i;
> +
> +       priv_lock(priv);
> +       if (!priv->allmulti) {
> +               priv_unlock(priv);
> +               return;
> +       }
> +       if (priv->rss) {
> +               rxq_allmulticast_disable(&priv->rxq_parent);
> +               goto end;
> +       }
> +       for (i = 0; (i != priv->rxqs_n); ++i)
> +               if ((*priv->rxqs)[i] != NULL)
> +                       rxq_allmulticast_disable((*priv->rxqs)[i]);
> +end:
> +       priv->allmulti = 0;
> +       priv_unlock(priv);
> +}
> +
> +/**
> + * 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).
> + */
> +static int
> +mlx4_link_update_unlocked(struct rte_eth_dev *dev, int wait_to_complete)
> +{
> +       struct priv *priv = dev->data->dev_private;
> +       struct ibv_port_attr port_attr;
> +       static const uint8_t width_mult[] = {
> +               /* Multiplier values taken from devinfo.c in libibverbs. */
> +               0, 1, 4, 0, 8, 0, 0, 0, 12, 0
> +       };
> +
> +       (void)wait_to_complete;
> +       errno = ibv_query_port(priv->ctx, priv->port, &port_attr);
> +       if (errno) {
> +               WARN("port query failed: %s", strerror(errno));
> +               return -1;
> +       }
> +       dev->data->dev_link = (struct rte_eth_link){
> +               .link_speed = (ibv_rate_to_mbps(mult_to_ibv_rate
> +                                               (port_attr.active_speed)) *
> +                              width_mult[(port_attr.active_width %
> +                                          sizeof(width_mult))]),
> +               .link_duplex = ETH_LINK_FULL_DUPLEX,
> +               .link_status = (port_attr.state == IBV_PORT_ACTIVE)
> +       };
> +       if (memcmp(&port_attr, &priv->port_attr, sizeof(port_attr))) {
> +               /* Link status changed. */
> +               priv->port_attr = port_attr;
> +               return 0;
> +       }
> +       /* Link status is still the same. */
> +       return -1;
> +}
> +
> +/**
> + * DPDK callback to retrieve physical link information.
> + *
> + * @param dev
> + *   Pointer to Ethernet device structure.
> + * @param wait_to_complete
> + *   Wait for request completion (ignored).
> + */
> +static int
> +mlx4_link_update(struct rte_eth_dev *dev, int wait_to_complete)
> +{
> +       struct priv *priv = dev->data->dev_private;
> +       int ret;
> +
> +       priv_lock(priv);
> +       ret = mlx4_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.
> + */
> +static int
> +mlx4_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) =
> +               mlx4_rx_burst;
> +
> +       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);
> +       priv->mtu = 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 mlx4_rx_burst() and uses
> +        * removed_rx_burst() instead. */
> +       rte_wmb();
> +       usleep(1000);
> +       /* Reconfigure each RX queue. */
> +       for (i = 0; (i != priv->rxqs_n); ++i) {
> +               struct rxq *rxq = (*priv->rxqs)[i];
> +               unsigned int max_frame_len;
> +               int sp;
> +
> +               if (rxq == NULL)
> +                       continue;
> +               /* Calculate new maximum frame length according to MTU and
> +                * toggle scattered support (sp) if necessary. */
> +               max_frame_len = (priv->mtu + ETHER_HDR_LEN +
> +                                (ETHER_MAX_VLAN_FRAME_LEN - ETHER_MAX_LEN));
> +               sp = (max_frame_len > (rxq->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;
> +               ret = rxq_rehash(dev, rxq);
> +               if (ret) {
> +                       /* Force SP RX if that queue requires it and abort. */
> +                       if (rxq->sp)
> +                               rx_func = mlx4_rx_burst_sp;
> +                       break;
> +               }
> +               /* Reenable non-RSS queue attributes. No need to check
> +                * for errors at this stage. */
> +               if (!priv->rss) {
> +                       rxq_mac_addrs_add(rxq);
> +                       if (priv->promisc)
> +                               rxq_promiscuous_enable(rxq);
> +                       if (priv->allmulti)
> +                               rxq_allmulticast_enable(rxq);
> +               }
> +               /* Scattered burst function takes priority. */
> +               if (rxq->sp)
> +                       rx_func = mlx4_rx_burst_sp;
> +       }
> +       /* 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.
> + */
> +static int
> +mlx4_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;
> +
> +       ifr.ifr_data = ðpause;
> +       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.
> + */
> +static int
> +mlx4_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;
> +
> +       ifr.ifr_data = ðpause;
> +       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;
> +}
> +
> +/**
> + * Configure a VLAN filter.
> + *
> + * @param dev
> + *   Pointer to Ethernet device structure.
> + * @param vlan_id
> + *   VLAN ID to filter.
> + * @param on
> + *   Toggle filter.
> + *
> + * @return
> + *   0 on success, errno value on failure.
> + */
> +static int
> +vlan_filter_set(struct rte_eth_dev *dev, uint16_t vlan_id, int on)
> +{
> +       struct priv *priv = dev->data->dev_private;
> +       unsigned int i;
> +       unsigned int j = -1;
> +
> +       DEBUG("%p: %s VLAN filter ID %" PRIu16,
> +             (void *)dev, (on ? "enable" : "disable"), vlan_id);
> +       for (i = 0; (i != elemof(priv->vlan_filter)); ++i) {
> +               if (!priv->vlan_filter[i].enabled) {
> +                       /* Unused index, remember it. */
> +                       j = i;
> +                       continue;
> +               }
> +               if (priv->vlan_filter[i].id != vlan_id)
> +                       continue;
> +               /* This VLAN ID is already known, use its index. */
> +               j = i;
> +               break;
> +       }
> +       /* Check if there's room for another VLAN filter. */
> +       if (j == (unsigned int)-1)
> +               return ENOMEM;
> +       /*
> +        * VLAN filters apply to all configured MAC addresses, flow
> +        * specifications must be reconfigured accordingly.
> +        */
> +       priv->vlan_filter[j].id = vlan_id;
> +       if ((on) && (!priv->vlan_filter[j].enabled)) {
> +               /*
> +                * Filter is disabled, enable it.
> +                * Rehashing flows in all RX queues is necessary.
> +                */
> +               if (priv->rss)
> +                       rxq_mac_addrs_del(&priv->rxq_parent);
> +               else
> +                       for (i = 0; (i != priv->rxqs_n); ++i)
> +                               if ((*priv->rxqs)[i] != NULL)
> +                                       rxq_mac_addrs_del((*priv->rxqs)[i]);
> +               priv->vlan_filter[j].enabled = 1;
> +               if (priv->started) {
> +                       if (priv->rss)
> +                               rxq_mac_addrs_add(&priv->rxq_parent);
> +                       else
> +                               for (i = 0; (i != priv->rxqs_n); ++i) {
> +                                       if ((*priv->rxqs)[i] == NULL)
> +                                               continue;
> +                                       rxq_mac_addrs_add((*priv->rxqs)[i]);
> +                               }
> +               }
> +       } else if ((!on) && (priv->vlan_filter[j].enabled)) {
> +               /*
> +                * Filter is enabled, disable it.
> +                * Rehashing flows in all RX queues is necessary.
> +                */
> +               if (priv->rss)
> +                       rxq_mac_addrs_del(&priv->rxq_parent);
> +               else
> +                       for (i = 0; (i != priv->rxqs_n); ++i)
> +                               if ((*priv->rxqs)[i] != NULL)
> +                                       rxq_mac_addrs_del((*priv->rxqs)[i]);
> +               priv->vlan_filter[j].enabled = 0;
> +               if (priv->started) {
> +                       if (priv->rss)
> +                               rxq_mac_addrs_add(&priv->rxq_parent);
> +                       else
> +                               for (i = 0; (i != priv->rxqs_n); ++i) {
> +                                       if ((*priv->rxqs)[i] == NULL)
> +                                               continue;
> +                                       rxq_mac_addrs_add((*priv->rxqs)[i]);
> +                               }
> +               }
> +       }
> +       return 0;
> +}
> +
> +/**
> + * DPDK callback to configure a VLAN filter.
> + *
> + * @param dev
> + *   Pointer to Ethernet device structure.
> + * @param vlan_id
> + *   VLAN ID to filter.
> + * @param on
> + *   Toggle filter.
> + *
> + * @return
> + *   0 on success, negative errno value on failure.
> + */
> +static int
> +mlx4_vlan_filter_set(struct rte_eth_dev *dev, uint16_t vlan_id, int on)
> +{
> +       struct priv *priv = dev->data->dev_private;
> +       int ret;
> +
> +       priv_lock(priv);
> +       ret = vlan_filter_set(dev, vlan_id, on);
> +       priv_unlock(priv);
> +       assert(ret >= 0);
> +       return -ret;
> +}
> +
> +static const struct eth_dev_ops mlx4_dev_ops = {
> +       .dev_configure = mlx4_dev_configure,
> +       .dev_start = mlx4_dev_start,
> +       .dev_stop = mlx4_dev_stop,
> +       .dev_close = mlx4_dev_close,
> +       .promiscuous_enable = mlx4_promiscuous_enable,
> +       .promiscuous_disable = mlx4_promiscuous_disable,
> +       .allmulticast_enable = mlx4_allmulticast_enable,
> +       .allmulticast_disable = mlx4_allmulticast_disable,
> +       .link_update = mlx4_link_update,
> +       .stats_get = mlx4_stats_get,
> +       .stats_reset = mlx4_stats_reset,
> +       .queue_stats_mapping_set = NULL,
> +       .dev_infos_get = mlx4_dev_infos_get,
> +       .vlan_filter_set = mlx4_vlan_filter_set,
> +       .vlan_tpid_set = NULL,
> +       .vlan_strip_queue_set = NULL,
> +       .vlan_offload_set = NULL,
> +       .rx_queue_setup = mlx4_rx_queue_setup,
> +       .tx_queue_setup = mlx4_tx_queue_setup,
> +       .rx_queue_release = mlx4_rx_queue_release,
> +       .tx_queue_release = mlx4_tx_queue_release,
> +       .dev_led_on = NULL,
> +       .dev_led_off = NULL,
> +       .flow_ctrl_get = mlx4_dev_get_flow_ctrl,
> +       .flow_ctrl_set = mlx4_dev_set_flow_ctrl,
> +       .priority_flow_ctrl_set = NULL,
> +       .mac_addr_remove = mlx4_mac_addr_remove,
> +       .mac_addr_add = mlx4_mac_addr_add,
> +       .mtu_set = mlx4_dev_set_mtu,
> +       .fdir_add_signature_filter = NULL,
> +       .fdir_update_signature_filter = NULL,
> +       .fdir_remove_signature_filter = NULL,
> +       .fdir_add_perfect_filter = NULL,
> +       .fdir_update_perfect_filter = NULL,
> +       .fdir_remove_perfect_filter = NULL,
> +       .fdir_set_masks = NULL
> +};
> +
> +/**
> + * 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.
> + */
> +static int
> +mlx4_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;
> +}
> +
> +/**
> + * Derive MAC address from port GID.
> + *
> + * @param[out] mac
> + *   MAC address output buffer.
> + * @param port
> + *   Physical port number.
> + * @param[in] gid
> + *   Port GID.
> + */
> +static void
> +mac_from_gid(uint8_t (*mac)[ETHER_ADDR_LEN], uint32_t port, uint8_t *gid)
> +{
> +       memcpy(&(*mac)[0], gid + 8, 3);
> +       memcpy(&(*mac)[3], gid + 13, 3);
> +       if (port == 1)
> +               (*mac)[0] ^= 2;
> +}
> +
> +/* Support up to 32 adapters. */
> +static struct {
> +       struct rte_pci_addr pci_addr; /* associated PCI address */
> +       uint32_t ports; /* physical ports bitfield. */
> +} mlx4_dev[32];
> +
> +/**
> + * Get device index in mlx4_dev[] from PCI bus address.
> + *
> + * @param[in] pci_addr
> + *   PCI bus address to look for.
> + *
> + * @return
> + *   mlx4_dev[] index on success, -1 on failure.
> + */
> +static int
> +mlx4_dev_idx(struct rte_pci_addr *pci_addr)
> +{
> +       unsigned int i;
> +       int ret = -1;
> +
> +       assert(pci_addr != NULL);
> +       for (i = 0; (i != elemof(mlx4_dev)); ++i) {
> +               if ((mlx4_dev[i].pci_addr.domain == pci_addr->domain) &&
> +                   (mlx4_dev[i].pci_addr.bus == pci_addr->bus) &&
> +                   (mlx4_dev[i].pci_addr.devid == pci_addr->devid) &&
> +                   (mlx4_dev[i].pci_addr.function == pci_addr->function))
> +                       return i;
> +               if ((mlx4_dev[i].ports == 0) && (ret == -1))
> +                       ret = i;
> +       }
> +       return ret;
> +}
> +
> +/**
> + * Retrieve integer value from environment variable.
> + *
> + * @param[in] name
> + *   Environment variable name.
> + *
> + * @return
> + *   Integer value, 0 if the variable is not set.
> + */
> +static int
> +mlx4_getenv_int(const char *name)
> +{
> +       const char *val = getenv(name);
> +
> +       if (val == NULL)
> +               return 0;
> +       return atoi(val);
> +}
> +
> +static struct eth_driver mlx4_driver;
> +
> +/**
> + * DPDK callback to register a PCI device.
> + *
> + * This function creates an Ethernet device for each port of a given
> + * PCI device.
> + *
> + * @param[in] pci_drv
> + *   PCI driver structure (mlx4_driver).
> + * @param[in] pci_dev
> + *   PCI device information.
> + *
> + * @return
> + *   0 on success, negative errno value on failure.
> + */
> +static int
> +mlx4_pci_devinit(struct rte_pci_driver *pci_drv, struct rte_pci_device *pci_dev)
> +{
> +       struct ibv_device **list;
> +       struct ibv_device *ibv_dev;
> +       int err = 0;
> +       struct ibv_context *attr_ctx = NULL;
> +       struct ibv_device_attr device_attr;
> +       unsigned int vf;
> +       int idx;
> +       int i;
> +
> +       (void)pci_drv;
> +       assert(pci_drv == &mlx4_driver.pci_drv);
> +       /* Get mlx4_dev[] index. */
> +       idx = mlx4_dev_idx(&pci_dev->addr);
> +       if (idx == -1) {
> +               ERROR("this driver cannot support any more adapters");
> +               return -ENOMEM;
> +       }
> +       DEBUG("using driver device index %d", idx);
> +
> +       /* Save PCI address. */
> +       mlx4_dev[idx].pci_addr = pci_dev->addr;
> +       list = ibv_get_device_list(&i);
> +       if (list == NULL) {
> +               assert(errno);
> +               if (errno == ENOSYS) {
> +                       WARN("cannot list devices, is ib_uverbs loaded?");
> +                       return 0;
> +               }
> +               return -errno;
> +       }
> +       assert(i >= 0);
> +       /*
> +        * For each listed device, check related sysfs entry against
> +        * the provided PCI ID.
> +        */
> +       while (i != 0) {
> +               struct rte_pci_addr pci_addr;
> +
> +               --i;
> +               DEBUG("checking device \"%s\"", list[i]->name);
> +               if (mlx4_ibv_device_to_pci_addr(list[i], &pci_addr))
> +                       continue;
> +               if ((pci_dev->addr.domain != pci_addr.domain) ||
> +                   (pci_dev->addr.bus != pci_addr.bus) ||
> +                   (pci_dev->addr.devid != pci_addr.devid) ||
> +                   (pci_dev->addr.function != pci_addr.function))
> +                       continue;
> +               vf = (pci_dev->id.device_id ==
> +                     PCI_DEVICE_ID_MELLANOX_CONNECTX3VF);
> +               INFO("PCI information matches, using device \"%s\" (VF: %s)",
> +                    list[i]->name, (vf ? "true" : "false"));
> +               attr_ctx = ibv_open_device(list[i]);
> +               err = errno;
> +               break;
> +       }
> +       if (attr_ctx == NULL) {
> +               ibv_free_device_list(list);
> +               switch (err) {
> +               case 0:
> +                       WARN("cannot access device, is mlx4_ib loaded?");
> +                       return 0;
> +               case EINVAL:
> +                       WARN("cannot use device, are drivers up to date?");
> +                       return 0;
> +               }
> +               assert(err > 0);
> +               return -err;
> +       }
> +       ibv_dev = list[i];
> +
> +       DEBUG("device opened");
> +       if (ibv_query_device(attr_ctx, &device_attr))
> +               goto error;
> +       INFO("%u port(s) detected", device_attr.phys_port_cnt);
> +
> +       for (i = 0; i < device_attr.phys_port_cnt; i++) {
> +               uint32_t port = i + 1; /* ports are indexed from one */
> +               uint32_t test = (1 << i);
> +               struct ibv_context *ctx = NULL;
> +               struct ibv_port_attr port_attr;
> +               struct ibv_pd *pd = NULL;
> +               struct priv *priv = NULL;
> +               struct rte_eth_dev *eth_dev;
> +#if defined(INLINE_RECV) || defined(RSS_SUPPORT)
> +               struct ibv_exp_device_attr exp_device_attr;
> +#endif
> +               struct ether_addr mac;
> +               union ibv_gid temp_gid;
> +
> +#ifdef RSS_SUPPORT
> +               exp_device_attr.comp_mask =
> +                       (IBV_EXP_DEVICE_ATTR_EXP_CAP_FLAGS |
> +                        IBV_EXP_DEVICE_ATTR_RSS_TBL_SZ);
> +#endif /* RSS_SUPPORT */
> +
> +               DEBUG("using port %u (%08" PRIx32 ")", port, test);
> +
> +               ctx = ibv_open_device(ibv_dev);
> +               if (ctx == NULL)
> +                       goto port_error;
> +
> +               /* Check port status. */
> +               err = ibv_query_port(ctx, port, &port_attr);
> +               if (err) {
> +                       ERROR("port query failed: %s", strerror(err));
> +                       goto port_error;
> +               }
> +               if (port_attr.state != IBV_PORT_ACTIVE)
> +                       WARN("bad state for port %d: \"%s\" (%d)",
> +                            port, ibv_port_state_str(port_attr.state),
> +                            port_attr.state);
> +
> +               /* Allocate protection domain. */
> +               pd = ibv_alloc_pd(ctx);
> +               if (pd == NULL) {
> +                       ERROR("PD allocation failure");
> +                       err = ENOMEM;
> +                       goto port_error;
> +               }
> +
> +               mlx4_dev[idx].ports |= test;
> +
> +               /* from rte_ethdev.c */
> +               priv = rte_zmalloc("ethdev private structure",
> +                                  sizeof(*priv),
> +                                  RTE_CACHE_LINE_SIZE);
> +               if (priv == NULL) {
> +                       ERROR("priv allocation failure");
> +                       err = ENOMEM;
> +                       goto port_error;
> +               }
> +
> +               priv->ctx = ctx;
> +               priv->device_attr = device_attr;
> +               priv->port_attr = port_attr;
> +               priv->port = port;
> +               priv->pd = pd;
> +               priv->mtu = ETHER_MTU;
> +#ifdef RSS_SUPPORT
> +               if (ibv_exp_query_device(ctx, &exp_device_attr)) {
> +                       INFO("experimental ibv_exp_query_device");
> +                       goto port_error;
> +               }
> +               if ((exp_device_attr.exp_device_cap_flags &
> +                    IBV_EXP_DEVICE_QPG) &&
> +                   (exp_device_attr.exp_device_cap_flags &
> +                    IBV_EXP_DEVICE_UD_RSS) &&
> +                   (exp_device_attr.comp_mask &
> +                    IBV_EXP_DEVICE_ATTR_RSS_TBL_SZ) &&
> +                   (exp_device_attr.max_rss_tbl_sz > 0)) {
> +                       priv->hw_qpg = 1;
> +                       priv->hw_rss = 1;
> +                       priv->max_rss_tbl_sz = exp_device_attr.max_rss_tbl_sz;
> +               } else {
> +                       priv->hw_qpg = 0;
> +                       priv->hw_rss = 0;
> +                       priv->max_rss_tbl_sz = 0;
> +               }
> +               priv->hw_tss = !!(exp_device_attr.exp_device_cap_flags &
> +                                 IBV_EXP_DEVICE_UD_TSS);
> +               DEBUG("device flags: %s%s%s",
> +                     (priv->hw_qpg ? "IBV_DEVICE_QPG " : ""),
> +                     (priv->hw_tss ? "IBV_DEVICE_TSS " : ""),
> +                     (priv->hw_rss ? "IBV_DEVICE_RSS " : ""));
> +               if (priv->hw_rss)
> +                       DEBUG("maximum RSS indirection table size: %u",
> +                             exp_device_attr.max_rss_tbl_sz);
> +#endif /* RSS_SUPPORT */
> +
> +#ifdef INLINE_RECV
> +               priv->inl_recv_size = mlx4_getenv_int("MLX4_INLINE_RECV_SIZE");
> +
> +               if (priv->inl_recv_size) {
> +                       exp_device_attr.comp_mask =
> +                               IBV_EXP_DEVICE_ATTR_INLINE_RECV_SZ;
> +                       if (ibv_exp_query_device(ctx, &exp_device_attr)) {
> +                               INFO("Couldn't query device for inline-receive"
> +                                    " capabilities.");
> +                               priv->inl_recv_size = 0;
> +                       } else {
> +                               if ((unsigned)exp_device_attr.inline_recv_sz <
> +                                   priv->inl_recv_size) {
> +                                       INFO("Max inline-receive (%d) <"
> +                                            " requested inline-receive (%u)",
> +                                            exp_device_attr.inline_recv_sz,
> +                                            priv->inl_recv_size);
> +                                       priv->inl_recv_size =
> +                                               exp_device_attr.inline_recv_sz;
> +                               }
> +                       }
> +                       INFO("Set inline receive size to %u",
> +                            priv->inl_recv_size);
> +               }
> +#endif /* INLINE_RECV */
> +
> +               (void)mlx4_getenv_int;
> +               priv->vf = vf;
> +               if (ibv_query_gid(ctx, port, 0, &temp_gid)) {
> +                       ERROR("ibv_query_gid() failure");
> +                       goto port_error;
> +               }
> +               /* Configure the first MAC address by default. */
> +               mac_from_gid(&mac.addr_bytes, port, temp_gid.raw);
> +               INFO("port %u MAC address is %02x:%02x:%02x:%02x:%02x:%02x",
> +                    priv->port,
> +                    mac.addr_bytes[0], mac.addr_bytes[1],
> +                    mac.addr_bytes[2], mac.addr_bytes[3],
> +                    mac.addr_bytes[4], mac.addr_bytes[5]);
> +               /* Register MAC and broadcast addresses. */
> +               claim_zero(priv_mac_addr_add(priv, 0,
> +                                            (const uint8_t (*)[ETHER_ADDR_LEN])
> +                                            mac.addr_bytes));
> +               claim_zero(priv_mac_addr_add(priv, 1,
> +                                            &(const uint8_t [ETHER_ADDR_LEN])
> +                                            { "\xff\xff\xff\xff\xff\xff" }));
> +#ifndef NDEBUG
> +               {
> +                       char ifname[IF_NAMESIZE];
> +
> +                       if (priv_get_ifname(priv, &ifname) == 0)
> +                               DEBUG("port %u ifname is \"%s\"",
> +                                     priv->port, ifname);
> +                       else
> +                               DEBUG("port %u ifname is unknown", priv->port);
> +               }
> +#endif
> +               /* Get actual MTU if possible. */
> +               priv_get_mtu(priv, &priv->mtu);
> +               DEBUG("port %u MTU is %u", priv->port, priv->mtu);
> +
> +               /* from rte_ethdev.c */
> +               {
> +                       char name[RTE_ETH_NAME_MAX_LEN];
> +
> +                       snprintf(name, sizeof(name), "%s port %u",
> +                                ibv_get_device_name(ibv_dev), port);
> +                       eth_dev = rte_eth_dev_allocate(name, RTE_ETH_DEV_PCI);
> +               }
> +               if (eth_dev == NULL) {
> +                       ERROR("can not allocate rte ethdev");
> +                       err = ENOMEM;
> +                       goto port_error;
> +               }
> +
> +               eth_dev->data->dev_private = priv;
> +               eth_dev->pci_dev = pci_dev;
> +               eth_dev->driver = &mlx4_driver;
> +               eth_dev->data->rx_mbuf_alloc_failed = 0;
> +               eth_dev->data->mtu = ETHER_MTU;
> +
> +               priv->dev = eth_dev;
> +               eth_dev->dev_ops = &mlx4_dev_ops;
> +               eth_dev->data->mac_addrs = priv->mac;
> +
> +               /* Bring Ethernet device up. */
> +               DEBUG("forcing Ethernet interface up");
> +               priv_set_flags(priv, ~IFF_UP, IFF_UP);
> +               continue;
> +
> +port_error:
> +               rte_free(priv);
> +               if (pd)
> +                       claim_zero(ibv_dealloc_pd(pd));
> +               if (ctx)
> +                       claim_zero(ibv_close_device(ctx));
> +               break;
> +       }
> +
> +       /*
> +        * XXX if something went wrong in the loop above, there is a resource
> +        * leak (ctx, pd, priv, dpdk ethdev) but we can do nothing about it as
> +        * long as the dpdk does not provide a way to deallocate a ethdev and a
> +        * way to enumerate the registered ethdevs to free the previous ones.
> +        */
> +
> +       /* no port found, complain */
> +       if (!mlx4_dev[idx].ports) {
> +               err = ENODEV;
> +               goto error;
> +       }
> +
> +error:
> +       if (attr_ctx)
> +               claim_zero(ibv_close_device(attr_ctx));
> +       if (list)
> +               ibv_free_device_list(list);
> +       assert(err >= 0);
> +       return -err;
> +}
> +
> +static const struct rte_pci_id mlx4_pci_id_map[] = {
> +       {
> +               .vendor_id = PCI_VENDOR_ID_MELLANOX,
> +               .device_id = PCI_DEVICE_ID_MELLANOX_CONNECTX3,
> +               .subsystem_vendor_id = PCI_ANY_ID,
> +               .subsystem_device_id = PCI_ANY_ID
> +       },
> +       {
> +               .vendor_id = PCI_VENDOR_ID_MELLANOX,
> +               .device_id = PCI_DEVICE_ID_MELLANOX_CONNECTX3PRO,
> +               .subsystem_vendor_id = PCI_ANY_ID,
> +               .subsystem_device_id = PCI_ANY_ID
> +       },
> +       {
> +               .vendor_id = PCI_VENDOR_ID_MELLANOX,
> +               .device_id = PCI_DEVICE_ID_MELLANOX_CONNECTX3VF,
> +               .subsystem_vendor_id = PCI_ANY_ID,
> +               .subsystem_device_id = PCI_ANY_ID
> +       },
> +       {
> +               .vendor_id = 0
> +       }
> +};
> +
> +static struct eth_driver mlx4_driver = {
> +       .pci_drv = {
> +               .name = MLX4_DRIVER_NAME,
> +               .id_table = mlx4_pci_id_map,
> +               .devinit = mlx4_pci_devinit,
> +       },
> +       .dev_private_size = sizeof(struct priv)
> +};
> +
> +/**
> + * Driver initialization routine.
> + */
> +static int
> +rte_mlx4_pmd_init(const char *name, const char *args)
> +{
> +       (void)name;
> +       (void)args;
> +       rte_eal_pci_register(&mlx4_driver.pci_drv);
> +       return 0;
> +}
> +
> +static struct rte_driver rte_mlx4_driver = {
> +       .type = PMD_PDEV,
> +       .name = MLX4_DRIVER_NAME,
> +       .init = rte_mlx4_pmd_init,
> +};
> +
> +PMD_REGISTER_DRIVER(rte_mlx4_driver)
> diff --git a/drivers/net/mlx4/mlx4.h b/drivers/net/mlx4/mlx4.h
> new file mode 100644
> index 0000000..433aa3b
> --- /dev/null
> +++ b/drivers/net/mlx4/mlx4.h
> @@ -0,0 +1,157 @@
> +/*-
> + *   BSD LICENSE
> + *
> + *   Copyright 2012-2015 6WIND S.A.
> + *   Copyright 2012 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.
> + */
> +
> +#ifndef RTE_PMD_MLX4_H_
> +#define RTE_PMD_MLX4_H_
> +
> +#include <stddef.h>
> +#include <stdint.h>
> +#include <limits.h>
> +
> +/*
> + * Maximum number of simultaneous MAC addresses supported.
> + *
> + * According to ConnectX's Programmer Reference Manual:
> + *   The L2 Address Match is implemented by comparing a MAC/VLAN combination
> + *   of 128 MAC addresses and 127 VLAN values, comprising 128x127 possible
> + *   L2 addresses.
> + */
> +#define MLX4_MAX_MAC_ADDRESSES 128
> +
> +/* Maximum number of simultaneous VLAN filters supported. See above. */
> +#define MLX4_MAX_VLAN_IDS 127
> +
> +/* Maximum number of Scatter/Gather Elements per Work Request. */
> +#ifndef MLX4_PMD_SGE_WR_N
> +#define MLX4_PMD_SGE_WR_N 4
> +#endif
> +
> +/* Maximum size for inline data. */
> +#ifndef MLX4_PMD_MAX_INLINE
> +#define MLX4_PMD_MAX_INLINE 0
> +#endif
> +
> +/*
> + * Maximum number of cached Memory Pools (MPs) per TX queue. Each RTE MP
> + * from which buffers are to be transmitted will have to be mapped by this
> + * driver to their own Memory Region (MR). This is a slow operation.
> + *
> + * This value is always 1 for RX queues.
> + */
> +#ifndef MLX4_PMD_TX_MP_CACHE
> +#define MLX4_PMD_TX_MP_CACHE 8
> +#endif
> +
> +/*
> + * If defined, only use software counters. The PMD will never ask the hardware
> + * for these, and many of them won't be available.
> + */
> +#ifndef MLX4_PMD_SOFT_COUNTERS
> +#define MLX4_PMD_SOFT_COUNTERS 1
> +#endif
> +
> +enum {
> +       PCI_VENDOR_ID_MELLANOX = 0x15b3,
> +};
> +
> +enum {
> +       PCI_DEVICE_ID_MELLANOX_CONNECTX3 = 0x1003,
> +       PCI_DEVICE_ID_MELLANOX_CONNECTX3VF = 0x1004,
> +       PCI_DEVICE_ID_MELLANOX_CONNECTX3PRO = 0x1007,
> +};
> +
> +#define MLX4_DRIVER_NAME "librte_pmd_mlx4"
> +
> +/* Bit-field manipulation. */
> +#define BITFIELD_DECLARE(bf, type, size)                               \
> +       type bf[(((size_t)(size) / (sizeof(type) * CHAR_BIT)) +         \
> +                !!((size_t)(size) % (sizeof(type) * CHAR_BIT)))]
> +#define BITFIELD_DEFINE(bf, type, size)                                        \
> +       BITFIELD_DECLARE((bf), type, (size)) = { 0 }
> +#define BITFIELD_SET(bf, b)                                            \
> +       (assert((size_t)(b) < (sizeof(bf) * CHAR_BIT)),                 \
> +        (void)((bf)[((b) / (sizeof((bf)[0]) * CHAR_BIT))] |=           \
> +               ((size_t)1 << ((b) % (sizeof((bf)[0]) * CHAR_BIT)))))
> +#define BITFIELD_RESET(bf, b)                                          \
> +       (assert((size_t)(b) < (sizeof(bf) * CHAR_BIT)),                 \
> +        (void)((bf)[((b) / (sizeof((bf)[0]) * CHAR_BIT))] &=           \
> +               ~((size_t)1 << ((b) % (sizeof((bf)[0]) * CHAR_BIT)))))
> +#define BITFIELD_ISSET(bf, b)                                          \
> +       (assert((size_t)(b) < (sizeof(bf) * CHAR_BIT)),                 \
> +        !!(((bf)[((b) / (sizeof((bf)[0]) * CHAR_BIT))] &               \
> +            ((size_t)1 << ((b) % (sizeof((bf)[0]) * CHAR_BIT))))))
> +
> +/* Number of elements in array. */
> +#define elemof(a) (sizeof(a) / sizeof((a)[0]))
> +
> +/* Cast pointer p to structure member m to its parent structure of type t. */
> +#define containerof(p, t, m) ((t *)((uint8_t *)(p) - offsetof(t, m)))
> +
> +/* Branch prediction helpers. */
> +#ifndef likely
> +#define likely(c) __builtin_expect(!!(c), 1)
> +#endif
> +#ifndef unlikely
> +#define unlikely(c) __builtin_expect(!!(c), 0)
> +#endif
> +
> +/* Debugging */
> +#ifndef NDEBUG
> +#include <stdio.h>
> +#define DEBUG__(m, ...)                                                \
> +       (fprintf(stderr, "%s:%d: %s(): " m "%c",                \
> +                __FILE__, __LINE__, __func__, __VA_ARGS__),    \
> +        fflush(stderr),                                        \
> +        (void)0)
> +/*
> + * Save/restore errno around DEBUG__().
> + * XXX somewhat undefined behavior, but works.
> + */
> +#define DEBUG_(...)                            \
> +       (errno = ((int []){                     \
> +               *(volatile int *)&errno,        \
> +               (DEBUG__(__VA_ARGS__), 0)       \
> +       })[0])
> +#define DEBUG(...) DEBUG_(__VA_ARGS__, '\n')
> +#define claim_zero(...) assert((__VA_ARGS__) == 0)
> +#define claim_nonzero(...) assert((__VA_ARGS__) != 0)
> +#define claim_positive(...) assert((__VA_ARGS__) >= 0)
> +#else /* NDEBUG */
> +/* No-ops. */
> +#define DEBUG(...) (void)0
> +#define claim_zero(...) (__VA_ARGS__)
> +#define claim_nonzero(...) (__VA_ARGS__)
> +#define claim_positive(...) (__VA_ARGS__)
> +#endif /* NDEBUG */
> +
> +#endif /* RTE_PMD_MLX4_H_ */
> diff --git a/drivers/net/mlx4/rte_pmd_mlx4_version.map b/drivers/net/mlx4/rte_pmd_mlx4_version.map
> new file mode 100644
> index 0000000..ef35398
> --- /dev/null
> +++ b/drivers/net/mlx4/rte_pmd_mlx4_version.map
> @@ -0,0 +1,4 @@
> +DPDK_2.0 {
> +
> +       local: *;
> +};
> diff --git a/lib/Makefile b/lib/Makefile
> index ffd7870..80978cd 100644
> --- a/lib/Makefile
> +++ b/lib/Makefile
> @@ -41,7 +41,6 @@ DIRS-$(CONFIG_RTE_LIBRTE_TIMER) += librte_timer
>  DIRS-$(CONFIG_RTE_LIBRTE_CFGFILE) += librte_cfgfile
>  DIRS-$(CONFIG_RTE_LIBRTE_CMDLINE) += librte_cmdline
>  DIRS-$(CONFIG_RTE_LIBRTE_ETHER) += librte_ether
> -DIRS-$(CONFIG_RTE_LIBRTE_MLX4_PMD) += librte_pmd_mlx4
>  DIRS-$(CONFIG_RTE_LIBRTE_PMD_RING) += librte_pmd_ring
>  DIRS-$(CONFIG_RTE_LIBRTE_PMD_PCAP) += librte_pmd_pcap
>  DIRS-$(CONFIG_RTE_LIBRTE_VIRTIO_PMD) += librte_pmd_virtio
> diff --git a/lib/librte_pmd_mlx4/Makefile b/lib/librte_pmd_mlx4/Makefile
> deleted file mode 100644
> index 97b364a..0000000
> --- a/lib/librte_pmd_mlx4/Makefile
> +++ /dev/null
> @@ -1,121 +0,0 @@
> -#   BSD LICENSE
> -#
> -#   Copyright 2012-2015 6WIND S.A.
> -#   Copyright 2012 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 $(RTE_SDK)/mk/rte.vars.mk
> -
> -# Library name.
> -LIB = librte_pmd_mlx4.a
> -
> -# Sources.
> -SRCS-$(CONFIG_RTE_LIBRTE_MLX4_PMD) += mlx4.c
> -
> -# Dependencies.
> -DEPDIRS-$(CONFIG_RTE_LIBRTE_MLX4_PMD) += lib/librte_ether
> -DEPDIRS-$(CONFIG_RTE_LIBRTE_MLX4_PMD) += lib/librte_mbuf
> -DEPDIRS-$(CONFIG_RTE_LIBRTE_MLX4_PMD) += lib/librte_eal
> -DEPDIRS-$(CONFIG_RTE_LIBRTE_MLX4_PMD) += lib/librte_mempool
> -DEPDIRS-$(CONFIG_RTE_LIBRTE_MLX4_PMD) += lib/librte_malloc
> -
> -# Basic CFLAGS.
> -CFLAGS += -O3
> -CFLAGS += -std=gnu99 -Wall -Wextra
> -CFLAGS += -g
> -CFLAGS += -I.
> -CFLAGS += -D_XOPEN_SOURCE=600
> -CFLAGS += $(WERROR_FLAGS)
> -
> -# A few warnings cannot be avoided in external headers.
> -CFLAGS += -Wno-error=cast-qual
> -
> -EXPORT_MAP := rte_pmd_mlx4_version.map
> -LIBABIVER := 1
> -
> -# DEBUG which is usually provided on the command-line may enable
> -# CONFIG_RTE_LIBRTE_MLX4_DEBUG.
> -ifeq ($(DEBUG),1)
> -CONFIG_RTE_LIBRTE_MLX4_DEBUG := y
> -endif
> -
> -# User-defined CFLAGS.
> -ifeq ($(CONFIG_RTE_LIBRTE_MLX4_DEBUG),y)
> -CFLAGS += -pedantic -UNDEBUG -DPEDANTIC
> -else
> -CFLAGS += -DNDEBUG -UPEDANTIC
> -endif
> -
> -ifdef CONFIG_RTE_LIBRTE_MLX4_SGE_WR_N
> -CFLAGS += -DMLX4_PMD_SGE_WR_N=$(CONFIG_RTE_LIBRTE_MLX4_SGE_WR_N)
> -endif
> -
> -ifdef CONFIG_RTE_LIBRTE_MLX4_MAX_INLINE
> -CFLAGS += -DMLX4_PMD_MAX_INLINE=$(CONFIG_RTE_LIBRTE_MLX4_MAX_INLINE)
> -endif
> -
> -ifdef CONFIG_RTE_LIBRTE_MLX4_TX_MP_CACHE
> -CFLAGS += -DMLX4_PMD_TX_MP_CACHE=$(CONFIG_RTE_LIBRTE_MLX4_TX_MP_CACHE)
> -endif
> -
> -ifdef CONFIG_RTE_LIBRTE_MLX4_SOFT_COUNTERS
> -CFLAGS += -DMLX4_PMD_SOFT_COUNTERS=$(CONFIG_RTE_LIBRTE_MLX4_SOFT_COUNTERS)
> -endif
> -
> -include $(RTE_SDK)/mk/rte.lib.mk
> -
> -# Generate and clean-up mlx4_autoconf.h.
> -
> -export CC CFLAGS CPPFLAGS EXTRA_CFLAGS EXTRA_CPPFLAGS
> -export AUTO_CONFIG_CFLAGS = -Wno-error
> -
> -ifndef V
> -AUTOCONF_OUTPUT := >/dev/null
> -endif
> -
> -mlx4_autoconf.h: $(RTE_SDK)/scripts/auto-config-h.sh
> -       $Q $(RM) -f -- '$@'
> -       $Q sh -- '$<' '$@' \
> -               RSS_SUPPORT \
> -               infiniband/verbs.h \
> -               enum IBV_EXP_DEVICE_UD_RSS $(AUTOCONF_OUTPUT)
> -       $Q sh -- '$<' '$@' \
> -               INLINE_RECV \
> -               infiniband/verbs.h \
> -               enum IBV_EXP_DEVICE_ATTR_INLINE_RECV_SZ $(AUTOCONF_OUTPUT)
> -       $Q sh -- '$<' '$@' \
> -               SEND_RAW_WR_SUPPORT \
> -               infiniband/verbs.h \
> -               type 'struct ibv_send_wr_raw' $(AUTOCONF_OUTPUT)
> -
> -mlx4.o: mlx4_autoconf.h
> -
> -clean_mlx4: FORCE
> -       $Q rm -f -- mlx4_autoconf.h
> -
> -clean: clean_mlx4
> diff --git a/lib/librte_pmd_mlx4/mlx4.c b/lib/librte_pmd_mlx4/mlx4.c
> deleted file mode 100644
> index f915bc1..0000000
> --- a/lib/librte_pmd_mlx4/mlx4.c
> +++ /dev/null
> @@ -1,4686 +0,0 @@
> -/*-
> - *   BSD LICENSE
> - *
> - *   Copyright 2012-2015 6WIND S.A.
> - *   Copyright 2012 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.
> - */
> -
> -/*
> - * Known limitations:
> - * - Multiple RX VLAN filters can be configured, but only the first one
> - *   works properly.
> - * - RSS hash key and options cannot be modified.
> - * - Hardware counters aren't implemented.
> - */
> -
> -/* System headers. */
> -#include <stddef.h>
> -#include <stdio.h>
> -#include <stdlib.h>
> -#include <stdint.h>
> -#include <inttypes.h>
> -#include <string.h>
> -#include <errno.h>
> -#include <unistd.h>
> -#include <limits.h>
> -#include <assert.h>
> -#include <arpa/inet.h>
> -#include <net/if.h>
> -#include <dirent.h>
> -#include <sys/ioctl.h>
> -#include <sys/socket.h>
> -#include <netinet/in.h>
> -#include <linux/if.h>
> -#include <linux/ethtool.h>
> -#include <linux/sockios.h>
> -
> -/* Verbs header. */
> -/* ISO C doesn't support unnamed structs/unions, disabling -pedantic. */
> -#ifdef PEDANTIC
> -#pragma GCC diagnostic ignored "-pedantic"
> -#endif
> -#include <infiniband/verbs.h>
> -#ifdef PEDANTIC
> -#pragma GCC diagnostic error "-pedantic"
> -#endif
> -
> -/* DPDK headers don't like -pedantic. */
> -#ifdef PEDANTIC
> -#pragma GCC diagnostic ignored "-pedantic"
> -#endif
> -#include <rte_config.h>
> -#include <rte_ether.h>
> -#include <rte_ethdev.h>
> -#include <rte_dev.h>
> -#include <rte_mbuf.h>
> -#include <rte_errno.h>
> -#include <rte_mempool.h>
> -#include <rte_prefetch.h>
> -#include <rte_malloc.h>
> -#include <rte_spinlock.h>
> -#include <rte_atomic.h>
> -#include <rte_version.h>
> -#include <rte_log.h>
> -#ifdef PEDANTIC
> -#pragma GCC diagnostic error "-pedantic"
> -#endif
> -
> -/* Generated configuration header. */
> -#include "mlx4_autoconf.h"
> -
> -/* PMD header. */
> -#include "mlx4.h"
> -
> -/* Runtime logging through RTE_LOG() is enabled when not in debugging mode.
> - * Intermediate LOG_*() macros add the required end-of-line characters. */
> -#ifndef NDEBUG
> -#define INFO(...) DEBUG(__VA_ARGS__)
> -#define WARN(...) DEBUG(__VA_ARGS__)
> -#define ERROR(...) DEBUG(__VA_ARGS__)
> -#else
> -#define LOG__(level, m, ...) \
> -       RTE_LOG(level, PMD, MLX4_DRIVER_NAME ": " m "%c", __VA_ARGS__)
> -#define LOG_(level, ...) LOG__(level, __VA_ARGS__, '\n')
> -#define INFO(...) LOG_(INFO, __VA_ARGS__)
> -#define WARN(...) LOG_(WARNING, __VA_ARGS__)
> -#define ERROR(...) LOG_(ERR, __VA_ARGS__)
> -#endif
> -
> -/* Convenience macros for accessing mbuf fields. */
> -#define NEXT(m) ((m)->next)
> -#define DATA_LEN(m) ((m)->data_len)
> -#define PKT_LEN(m) ((m)->pkt_len)
> -#define DATA_OFF(m) ((m)->data_off)
> -#define SET_DATA_OFF(m, o) ((m)->data_off = (o))
> -#define NB_SEGS(m) ((m)->nb_segs)
> -#define PORT(m) ((m)->port)
> -
> -/* Work Request ID data type (64 bit). */
> -typedef union {
> -       struct {
> -               uint32_t id;
> -               uint16_t offset;
> -       } data;
> -       uint64_t raw;
> -} wr_id_t;
> -
> -#define WR_ID(o) (((wr_id_t *)&(o))->data)
> -
> -/* Compile-time check. */
> -static inline void wr_id_t_check(void)
> -{
> -       wr_id_t check[1 + (2 * -!(sizeof(wr_id_t) == sizeof(uint64_t)))];
> -
> -       (void)check;
> -       (void)wr_id_t_check;
> -}
> -
> -/* If raw send operations are available, use them since they are faster. */
> -#ifdef SEND_RAW_WR_SUPPORT
> -typedef struct ibv_send_wr_raw mlx4_send_wr_t;
> -#define mlx4_post_send ibv_post_send_raw
> -#else
> -typedef struct ibv_send_wr mlx4_send_wr_t;
> -#define mlx4_post_send ibv_post_send
> -#endif
> -
> -struct mlx4_rxq_stats {
> -       unsigned int idx; /**< Mapping index. */
> -#ifdef MLX4_PMD_SOFT_COUNTERS
> -       uint64_t ipackets;  /**< Total of successfully received packets. */
> -       uint64_t ibytes;    /**< Total of successfully received bytes. */
> -#endif
> -       uint64_t idropped;  /**< Total of packets dropped when RX ring full. */
> -       uint64_t rx_nombuf; /**< Total of RX mbuf allocation failures. */
> -};
> -
> -struct mlx4_txq_stats {
> -       unsigned int idx; /**< Mapping index. */
> -#ifdef MLX4_PMD_SOFT_COUNTERS
> -       uint64_t opackets; /**< Total of successfully sent packets. */
> -       uint64_t obytes;   /**< Total of successfully sent bytes. */
> -#endif
> -       uint64_t odropped; /**< Total of packets not sent when TX ring full. */
> -};
> -
> -/* RX element (scattered packets). */
> -struct rxq_elt_sp {
> -       struct ibv_recv_wr wr; /* Work Request. */
> -       struct ibv_sge sges[MLX4_PMD_SGE_WR_N]; /* Scatter/Gather Elements. */
> -       struct rte_mbuf *bufs[MLX4_PMD_SGE_WR_N]; /* SGEs buffers. */
> -};
> -
> -/* RX element. */
> -struct rxq_elt {
> -       struct ibv_recv_wr wr; /* Work Request. */
> -       struct ibv_sge sge; /* Scatter/Gather Element. */
> -       /* mbuf pointer is derived from WR_ID(wr.wr_id).offset. */
> -};
> -
> -/* RX queue descriptor. */
> -struct rxq {
> -       struct priv *priv; /* Back pointer to private data. */
> -       struct rte_mempool *mp; /* Memory Pool for allocations. */
> -       struct ibv_mr *mr; /* Memory Region (for mp). */
> -       struct ibv_cq *cq; /* Completion Queue. */
> -       struct ibv_qp *qp; /* Queue Pair. */
> -       /*
> -        * There is exactly one flow configured per MAC address. Each flow
> -        * may contain several specifications, one per configured VLAN ID.
> -        */
> -       BITFIELD_DECLARE(mac_configured, uint32_t, MLX4_MAX_MAC_ADDRESSES);
> -       struct ibv_exp_flow *mac_flow[MLX4_MAX_MAC_ADDRESSES];
> -       struct ibv_exp_flow *promisc_flow; /* Promiscuous flow. */
> -       struct ibv_exp_flow *allmulti_flow; /* Multicast flow. */
> -       unsigned int port_id; /* Port ID for incoming packets. */
> -       unsigned int elts_n; /* (*elts)[] length. */
> -       union {
> -               struct rxq_elt_sp (*sp)[]; /* Scattered RX elements. */
> -               struct rxq_elt (*no_sp)[]; /* RX elements. */
> -       } elts;
> -       unsigned int sp:1; /* Use scattered RX elements. */
> -       uint32_t mb_len; /* Length of a mp-issued mbuf. */
> -       struct mlx4_rxq_stats stats; /* RX queue counters. */
> -       unsigned int socket; /* CPU socket ID for allocations. */
> -};
> -
> -/* TX element. */
> -struct txq_elt {
> -       mlx4_send_wr_t wr; /* Work Request. */
> -       struct ibv_sge sges[MLX4_PMD_SGE_WR_N]; /* Scatter/Gather Elements. */
> -       /* mbuf pointer is derived from WR_ID(wr.wr_id).offset. */
> -};
> -
> -/* Linear buffer type. It is used when transmitting buffers with too many
> - * segments that do not fit the hardware queue (see max_send_sge).
> - * Extra segments are copied (linearized) in such buffers, replacing the
> - * last SGE during TX.
> - * The size is arbitrary but large enough to hold a jumbo frame with
> - * 8 segments considering mbuf.buf_len is about 2048 bytes. */
> -typedef uint8_t linear_t[16384];
> -
> -/* TX queue descriptor. */
> -struct txq {
> -       struct priv *priv; /* Back pointer to private data. */
> -       struct {
> -               struct rte_mempool *mp; /* Cached Memory Pool. */
> -               struct ibv_mr *mr; /* Memory Region (for mp). */
> -               uint32_t lkey; /* mr->lkey */
> -       } mp2mr[MLX4_PMD_TX_MP_CACHE]; /* MP to MR translation table. */
> -       struct ibv_cq *cq; /* Completion Queue. */
> -       struct ibv_qp *qp; /* Queue Pair. */
> -#if MLX4_PMD_MAX_INLINE > 0
> -       uint32_t max_inline; /* Max inline send size <= MLX4_PMD_MAX_INLINE. */
> -#endif
> -       unsigned int elts_n; /* (*elts)[] length. */
> -       struct txq_elt (*elts)[]; /* TX elements. */
> -       unsigned int elts_head; /* Current index in (*elts)[]. */
> -       unsigned int elts_tail; /* First element awaiting completion. */
> -       unsigned int elts_comp; /* Number of completion requests. */
> -       struct mlx4_txq_stats stats; /* TX queue counters. */
> -       linear_t (*elts_linear)[]; /* Linearized buffers. */
> -       struct ibv_mr *mr_linear; /* Memory Region for linearized buffers. */
> -       unsigned int socket; /* CPU socket ID for allocations. */
> -};
> -
> -struct priv {
> -       struct rte_eth_dev *dev; /* Ethernet device. */
> -       struct ibv_context *ctx; /* Verbs context. */
> -       struct ibv_device_attr device_attr; /* Device properties. */
> -       struct ibv_port_attr port_attr; /* Physical port properties. */
> -       struct ibv_pd *pd; /* Protection Domain. */
> -       /*
> -        * MAC addresses array and configuration bit-field.
> -        * An extra entry that cannot be modified by the DPDK is reserved
> -        * for broadcast frames (destination MAC address ff:ff:ff:ff:ff:ff).
> -        */
> -       struct ether_addr mac[MLX4_MAX_MAC_ADDRESSES];
> -       BITFIELD_DECLARE(mac_configured, uint32_t, MLX4_MAX_MAC_ADDRESSES);
> -       /* VLAN filters. */
> -       struct {
> -               unsigned int enabled:1; /* If enabled. */
> -               unsigned int id:12; /* VLAN ID (0-4095). */
> -       } vlan_filter[MLX4_MAX_VLAN_IDS]; /* VLAN filters table. */
> -       /* Device properties. */
> -       uint16_t mtu; /* Configured MTU. */
> -       uint8_t port; /* Physical port number. */
> -       unsigned int started:1; /* Device started, flows enabled. */
> -       unsigned int promisc:1; /* Device in promiscuous mode. */
> -       unsigned int promisc_ok:1; /* Promiscuous flow is supported. */
> -       unsigned int allmulti:1; /* Device receives all multicast packets. */
> -       unsigned int hw_qpg:1; /* QP groups are supported. */
> -       unsigned int hw_tss:1; /* TSS is supported. */
> -       unsigned int hw_rss:1; /* RSS is supported. */
> -       unsigned int rss:1; /* RSS is enabled. */
> -       unsigned int vf:1; /* This is a VF device. */
> -#ifdef INLINE_RECV
> -       unsigned int inl_recv_size; /* Inline recv size */
> -#endif
> -       unsigned int max_rss_tbl_sz; /* Maximum number of RSS queues. */
> -       /* RX/TX queues. */
> -       struct rxq rxq_parent; /* Parent queue when RSS is enabled. */
> -       unsigned int rxqs_n; /* RX queues array size. */
> -       unsigned int txqs_n; /* TX queues array size. */
> -       struct rxq *(*rxqs)[]; /* RX queues. */
> -       struct txq *(*txqs)[]; /* TX queues. */
> -       rte_spinlock_t lock; /* Lock for control functions. */
> -};
> -
> -/**
> - * Lock private structure to protect it from concurrent access in the
> - * control path.
> - *
> - * @param priv
> - *   Pointer to private structure.
> - */
> -static void
> -priv_lock(struct priv *priv)
> -{
> -       rte_spinlock_lock(&priv->lock);
> -}
> -
> -/**
> - * Unlock private structure.
> - *
> - * @param priv
> - *   Pointer to private structure.
> - */
> -static void
> -priv_unlock(struct priv *priv)
> -{
> -       rte_spinlock_unlock(&priv->lock);
> -}
> -
> -/* Allocate a buffer on the stack and fill it with a printf format string. */
> -#define MKSTR(name, ...) \
> -       char name[snprintf(NULL, 0, __VA_ARGS__) + 1]; \
> -       \
> -       snprintf(name, sizeof(name), __VA_ARGS__)
> -
> -/**
> - * 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.
> - */
> -static int
> -priv_get_ifname(const struct priv *priv, char (*ifname)[IF_NAMESIZE])
> -{
> -       int ret = -1;
> -       DIR *dir;
> -       struct dirent *dent;
> -
> -       {
> -               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_id;
> -               int r;
> -
> -               if ((name[0] == '.') &&
> -                   ((name[1] == '\0') ||
> -                    ((name[1] == '.') && (name[2] == '\0'))))
> -                       continue;
> -
> -               MKSTR(path, "%s/device/net/%s/dev_id",
> -                     priv->ctx->device->ibdev_path, name);
> -
> -               file = fopen(path, "rb");
> -               if (file == NULL)
> -                       continue;
> -               r = fscanf(file, "%x", &dev_id);
> -               fclose(file);
> -               if ((r == 1) && (dev_id == (priv->port - 1u))) {
> -                       snprintf(*ifname, sizeof(*ifname), "%s", name);
> -                       ret = 0;
> -                       break;
> -               }
> -       }
> -       closedir(dir);
> -       return ret;
> -}
> -
> -/**
> - * 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.
> - */
> -static 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;
> -}
> -
> -/**
> - * 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.
> - */
> -static 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)
> -{
> -       return priv_set_sysfs_ulong(priv, "mtu", mtu);
> -}
> -
> -/**
> - * 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.
> - */
> -static 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;
> -       return priv_set_sysfs_ulong(priv, "flags", tmp);
> -}
> -
> -/* Device configuration. */
> -
> -static int
> -rxq_setup(struct rte_eth_dev *dev, struct rxq *rxq, uint16_t desc,
> -         unsigned int socket, const struct rte_eth_rxconf *conf,
> -         struct rte_mempool *mp);
> -
> -static void
> -rxq_cleanup(struct rxq *rxq);
> -
> -/**
> - * Ethernet device configuration.
> - *
> - * Prepare the driver for a given number of TX and RX queues.
> - * Allocate parent RSS queue when several RX queues are requested.
> - *
> - * @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 tmp;
> -       int ret;
> -
> -       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->rxqs_n)
> -               return 0;
> -       INFO("%p: RX queues number update: %u -> %u",
> -            (void *)dev, priv->rxqs_n, rxqs_n);
> -       /* If RSS is enabled, disable it first. */
> -       if (priv->rss) {
> -               unsigned int i;
> -
> -               /* Only if there are no remaining child RX queues. */
> -               for (i = 0; (i != priv->rxqs_n); ++i)
> -                       if ((*priv->rxqs)[i] != NULL)
> -                               return EINVAL;
> -               rxq_cleanup(&priv->rxq_parent);
> -               priv->rss = 0;
> -               priv->rxqs_n = 0;
> -       }
> -       if (rxqs_n <= 1) {
> -               /* Nothing else to do. */
> -               priv->rxqs_n = rxqs_n;
> -               return 0;
> -       }
> -       /* Allocate a new RSS parent queue if supported by hardware. */
> -       if (!priv->hw_rss) {
> -               ERROR("%p: only a single RX queue can be configured when"
> -                     " hardware doesn't support RSS",
> -                     (void *)dev);
> -               return EINVAL;
> -       }
> -       /* Fail if hardware doesn't support that many RSS queues. */
> -       if (rxqs_n >= priv->max_rss_tbl_sz) {
> -               ERROR("%p: only %u RX queues can be configured for RSS",
> -                     (void *)dev, priv->max_rss_tbl_sz);
> -               return EINVAL;
> -       }
> -       priv->rss = 1;
> -       tmp = priv->rxqs_n;
> -       priv->rxqs_n = rxqs_n;
> -       ret = rxq_setup(dev, &priv->rxq_parent, 0, 0, NULL, NULL);
> -       if (!ret)
> -               return 0;
> -       /* Failure, rollback. */
> -       priv->rss = 0;
> -       priv->rxqs_n = tmp;
> -       assert(ret > 0);
> -       return ret;
> -}
> -
> -/**
> - * DPDK callback for Ethernet device configuration.
> - *
> - * @param dev
> - *   Pointer to Ethernet device structure.
> - *
> - * @return
> - *   0 on success, negative errno value on failure.
> - */
> -static int
> -mlx4_dev_configure(struct rte_eth_dev *dev)
> -{
> -       struct priv *priv = dev->data->dev_private;
> -       int ret;
> -
> -       priv_lock(priv);
> -       ret = dev_configure(dev);
> -       assert(ret >= 0);
> -       priv_unlock(priv);
> -       return -ret;
> -}
> -
> -/* TX queues handling. */
> -
> -/**
> - * Allocate TX queue elements.
> - *
> - * @param txq
> - *   Pointer to TX queue structure.
> - * @param elts_n
> - *   Number of elements to allocate.
> - *
> - * @return
> - *   0 on success, errno value on failure.
> - */
> -static int
> -txq_alloc_elts(struct txq *txq, unsigned int elts_n)
> -{
> -       unsigned int i;
> -       struct txq_elt (*elts)[elts_n] =
> -               rte_calloc_socket("TXQ", 1, sizeof(*elts), 0, txq->socket);
> -       linear_t (*elts_linear)[elts_n] =
> -               rte_calloc_socket("TXQ", 1, sizeof(*elts_linear), 0,
> -                                 txq->socket);
> -       struct ibv_mr *mr_linear = NULL;
> -       int ret = 0;
> -
> -       if ((elts == NULL) || (elts_linear == NULL)) {
> -               ERROR("%p: can't allocate packets array", (void *)txq);
> -               ret = ENOMEM;
> -               goto error;
> -       }
> -       mr_linear =
> -               ibv_reg_mr(txq->priv->pd, elts_linear, sizeof(*elts_linear),
> -                          (IBV_ACCESS_LOCAL_WRITE | IBV_ACCESS_REMOTE_WRITE));
> -       if (mr_linear == NULL) {
> -               ERROR("%p: unable to configure MR, ibv_reg_mr() failed",
> -                     (void *)txq);
> -               ret = EINVAL;
> -               goto error;
> -       }
> -       for (i = 0; (i != elts_n); ++i) {
> -               struct txq_elt *elt = &(*elts)[i];
> -               mlx4_send_wr_t *wr = &elt->wr;
> -
> -               /* Configure WR. */
> -               WR_ID(wr->wr_id).id = i;
> -               WR_ID(wr->wr_id).offset = 0;
> -               wr->sg_list = &elt->sges[0];
> -               wr->opcode = IBV_WR_SEND;
> -               /* Other fields are updated during TX. */
> -       }
> -       DEBUG("%p: allocated and configured %u WRs", (void *)txq, elts_n);
> -       txq->elts_n = elts_n;
> -       txq->elts = elts;
> -       txq->elts_head = 0;
> -       txq->elts_tail = 0;
> -       txq->elts_comp = 0;
> -       txq->elts_linear = elts_linear;
> -       txq->mr_linear = mr_linear;
> -       assert(ret == 0);
> -       return 0;
> -error:
> -       if (mr_linear != NULL)
> -               claim_zero(ibv_dereg_mr(mr_linear));
> -
> -       rte_free(elts_linear);
> -       rte_free(elts);
> -
> -       DEBUG("%p: failed, freed everything", (void *)txq);
> -       assert(ret > 0);
> -       return ret;
> -}
> -
> -/**
> - * Free TX queue elements.
> - *
> - * @param txq
> - *   Pointer to TX queue structure.
> - */
> -static void
> -txq_free_elts(struct txq *txq)
> -{
> -       unsigned int i;
> -       unsigned int elts_n = txq->elts_n;
> -       struct txq_elt (*elts)[elts_n] = txq->elts;
> -       linear_t (*elts_linear)[elts_n] = txq->elts_linear;
> -       struct ibv_mr *mr_linear = txq->mr_linear;
> -
> -       DEBUG("%p: freeing WRs", (void *)txq);
> -       txq->elts_n = 0;
> -       txq->elts = NULL;
> -       txq->elts_linear = NULL;
> -       txq->mr_linear = NULL;
> -       if (mr_linear != NULL)
> -               claim_zero(ibv_dereg_mr(mr_linear));
> -
> -       rte_free(elts_linear);
> -       if (elts == NULL)
> -               return;
> -       for (i = 0; (i != elemof(*elts)); ++i) {
> -               struct txq_elt *elt = &(*elts)[i];
> -
> -               if (WR_ID(elt->wr.wr_id).offset == 0)
> -                       continue;
> -               rte_pktmbuf_free((void *)(elt->sges[0].addr -
> -                                         WR_ID(elt->wr.wr_id).offset));
> -       }
> -       rte_free(elts);
> -}
> -
> -
> -/**
> - * Clean up a TX queue.
> - *
> - * Destroy objects, free allocated memory and reset the structure for reuse.
> - *
> - * @param txq
> - *   Pointer to TX queue structure.
> - */
> -static void
> -txq_cleanup(struct txq *txq)
> -{
> -       size_t i;
> -
> -       DEBUG("cleaning up %p", (void *)txq);
> -       txq_free_elts(txq);
> -       if (txq->qp != NULL)
> -               claim_zero(ibv_destroy_qp(txq->qp));
> -       if (txq->cq != NULL)
> -               claim_zero(ibv_destroy_cq(txq->cq));
> -       for (i = 0; (i != elemof(txq->mp2mr)); ++i) {
> -               if (txq->mp2mr[i].mp == NULL)
> -                       break;
> -               assert(txq->mp2mr[i].mr != NULL);
> -               claim_zero(ibv_dereg_mr(txq->mp2mr[i].mr));
> -       }
> -       memset(txq, 0, sizeof(*txq));
> -}
> -
> -/**
> - * Manage TX completions.
> - *
> - * When sending a burst, mlx4_tx_burst() posts several WRs.
> - * To improve performance, a completion event is only required for the last of
> - * them. Doing so discards completion information for other WRs, but this
> - * information would not be used anyway.
> - *
> - * @param txq
> - *   Pointer to TX queue structure.
> - *
> - * @return
> - *   0 on success, -1 on failure.
> - */
> -static int
> -txq_complete(struct txq *txq)
> -{
> -       unsigned int elts_comp = txq->elts_comp;
> -       unsigned int elts_tail;
> -       const unsigned int elts_n = txq->elts_n;
> -       struct ibv_wc wcs[elts_comp];
> -       int wcs_n;
> -
> -       if (unlikely(elts_comp == 0))
> -               return 0;
> -#ifdef DEBUG_SEND
> -       DEBUG("%p: processing %u work requests completions",
> -             (void *)txq, elts_comp);
> -#endif
> -       wcs_n = ibv_poll_cq(txq->cq, elts_comp, wcs);
> -       if (unlikely(wcs_n == 0))
> -               return 0;
> -       if (unlikely(wcs_n < 0)) {
> -               DEBUG("%p: ibv_poll_cq() failed (wcs_n=%d)",
> -                     (void *)txq, wcs_n);
> -               return -1;
> -       }
> -       elts_comp -= wcs_n;
> -       assert(elts_comp <= txq->elts_comp);
> -       /*
> -        * Work Completion ID contains the associated element index in
> -        * (*txq->elts)[]. Since WCs are returned in order, we only need to
> -        * look at the last WC to clear older Work Requests.
> -        *
> -        * Assume WC status is successful as nothing can be done about it
> -        * anyway.
> -        */
> -       elts_tail = WR_ID(wcs[wcs_n - 1].wr_id).id;
> -       /* Consume the last WC. */
> -       if (++elts_tail >= elts_n)
> -               elts_tail = 0;
> -       txq->elts_tail = elts_tail;
> -       txq->elts_comp = elts_comp;
> -       return 0;
> -}
> -
> -/**
> - * Get Memory Region (MR) <-> Memory Pool (MP) association from txq->mp2mr[].
> - * Add MP to txq->mp2mr[] if it's not registered yet. If mp2mr[] is full,
> - * remove an entry first.
> - *
> - * @param txq
> - *   Pointer to TX queue structure.
> - * @param[in] mp
> - *   Memory Pool for which a Memory Region lkey must be returned.
> - *
> - * @return
> - *   mr->lkey on success, (uint32_t)-1 on failure.
> - */
> -static uint32_t
> -txq_mp2mr(struct txq *txq, struct rte_mempool *mp)
> -{
> -       unsigned int i;
> -       struct ibv_mr *mr;
> -
> -       for (i = 0; (i != elemof(txq->mp2mr)); ++i) {
> -               if (unlikely(txq->mp2mr[i].mp == NULL)) {
> -                       /* Unknown MP, add a new MR for it. */
> -                       break;
> -               }
> -               if (txq->mp2mr[i].mp == mp) {
> -                       assert(txq->mp2mr[i].lkey != (uint32_t)-1);
> -                       assert(txq->mp2mr[i].mr->lkey == txq->mp2mr[i].lkey);
> -                       return txq->mp2mr[i].lkey;
> -               }
> -       }
> -       /* Add a new entry, register MR first. */
> -       DEBUG("%p: discovered new memory pool %p", (void *)txq, (void *)mp);
> -       mr = ibv_reg_mr(txq->priv->pd,
> -                       (void *)mp->elt_va_start,
> -                       (mp->elt_va_end - mp->elt_va_start),
> -                       (IBV_ACCESS_LOCAL_WRITE | IBV_ACCESS_REMOTE_WRITE));
> -       if (unlikely(mr == NULL)) {
> -               DEBUG("%p: unable to configure MR, ibv_reg_mr() failed.",
> -                     (void *)txq);
> -               return (uint32_t)-1;
> -       }
> -       if (unlikely(i == elemof(txq->mp2mr))) {
> -               /* Table is full, remove oldest entry. */
> -               DEBUG("%p: MR <-> MP table full, dropping oldest entry.",
> -                     (void *)txq);
> -               --i;
> -               claim_zero(ibv_dereg_mr(txq->mp2mr[i].mr));
> -               memmove(&txq->mp2mr[0], &txq->mp2mr[1],
> -                       (sizeof(txq->mp2mr) - sizeof(txq->mp2mr[0])));
> -       }
> -       /* Store the new entry. */
> -       txq->mp2mr[i].mp = mp;
> -       txq->mp2mr[i].mr = mr;
> -       txq->mp2mr[i].lkey = mr->lkey;
> -       DEBUG("%p: new MR lkey for MP %p: 0x%08" PRIu32,
> -             (void *)txq, (void *)mp, txq->mp2mr[i].lkey);
> -       return txq->mp2mr[i].lkey;
> -}
> -
> -/**
> - * Copy scattered mbuf contents to a single linear buffer.
> - *
> - * @param[out] linear
> - *   Linear output buffer.
> - * @param[in] buf
> - *   Scattered input buffer.
> - *
> - * @return
> - *   Number of bytes copied to the output buffer or 0 if not large enough.
> - */
> -static unsigned int
> -linearize_mbuf(linear_t *linear, struct rte_mbuf *buf)
> -{
> -       unsigned int size = 0;
> -       unsigned int offset;
> -
> -       do {
> -               unsigned int len = DATA_LEN(buf);
> -
> -               offset = size;
> -               size += len;
> -               if (unlikely(size > sizeof(*linear)))
> -                       return 0;
> -               memcpy(&(*linear)[offset],
> -                      rte_pktmbuf_mtod(buf, uint8_t *),
> -                      len);
> -               buf = NEXT(buf);
> -       } while (buf != NULL);
> -       return size;
> -}
> -
> -/**
> - * DPDK callback for TX.
> - *
> - * @param dpdk_txq
> - *   Generic pointer to TX queue structure.
> - * @param[in] pkts
> - *   Packets to transmit.
> - * @param pkts_n
> - *   Number of packets in array.
> - *
> - * @return
> - *   Number of packets successfully transmitted (<= pkts_n).
> - */
> -static uint16_t
> -mlx4_tx_burst(void *dpdk_txq, struct rte_mbuf **pkts, uint16_t pkts_n)
> -{
> -       struct txq *txq = (struct txq *)dpdk_txq;
> -       mlx4_send_wr_t head;
> -       mlx4_send_wr_t **wr_next = &head.next;
> -       mlx4_send_wr_t *bad_wr;
> -       unsigned int elts_head = txq->elts_head;
> -       const unsigned int elts_tail = txq->elts_tail;
> -       const unsigned int elts_n = txq->elts_n;
> -       unsigned int i;
> -       unsigned int max;
> -       int err;
> -
> -       txq_complete(txq);
> -       max = (elts_n - (elts_head - elts_tail));
> -       if (max > elts_n)
> -               max -= elts_n;
> -       assert(max >= 1);
> -       assert(max <= elts_n);
> -       /* Always leave one free entry in the ring. */
> -       --max;
> -       if (max == 0)
> -               return 0;
> -       if (max > pkts_n)
> -               max = pkts_n;
> -       for (i = 0; (i != max); ++i) {
> -               struct rte_mbuf *buf = pkts[i];
> -               struct txq_elt *elt = &(*txq->elts)[elts_head];
> -               mlx4_send_wr_t *wr = &elt->wr;
> -               unsigned int segs = NB_SEGS(buf);
> -#if (MLX4_PMD_MAX_INLINE > 0) || defined(MLX4_PMD_SOFT_COUNTERS)
> -               unsigned int sent_size = 0;
> -#endif
> -               unsigned int j;
> -               int linearize = 0;
> -
> -               /* Clean up old buffer. */
> -               if (likely(WR_ID(wr->wr_id).offset != 0)) {
> -                       struct rte_mbuf *tmp = (void *)
> -                               (elt->sges[0].addr - WR_ID(wr->wr_id).offset);
> -
> -                       /* Faster than rte_pktmbuf_free(). */
> -                       do {
> -                               struct rte_mbuf *next = NEXT(tmp);
> -
> -                               rte_pktmbuf_free_seg(tmp);
> -                               tmp = next;
> -                       } while (tmp != NULL);
> -               }
> -#ifndef NDEBUG
> -               /* For assert(). */
> -               WR_ID(wr->wr_id).offset = 0;
> -               for (j = 0; ((int)j < wr->num_sge); ++j) {
> -                       elt->sges[j].addr = 0;
> -                       elt->sges[j].length = 0;
> -                       elt->sges[j].lkey = 0;
> -               }
> -               wr->next = NULL;
> -               wr->num_sge = 0;
> -#endif
> -               /* Sanity checks, most of which are only relevant with
> -                * debugging enabled. */
> -               assert(WR_ID(wr->wr_id).id == elts_head);
> -               assert(WR_ID(wr->wr_id).offset == 0);
> -               assert(wr->next == NULL);
> -               assert(wr->sg_list == &elt->sges[0]);
> -               assert(wr->num_sge == 0);
> -               assert(wr->opcode == IBV_WR_SEND);
> -               /* When there are too many segments, extra segments are
> -                * linearized in the last SGE. */
> -               if (unlikely(segs > elemof(elt->sges))) {
> -                       segs = (elemof(elt->sges) - 1);
> -                       linearize = 1;
> -               }
> -               /* Set WR fields. */
> -               assert(((uintptr_t)rte_pktmbuf_mtod(buf, char *) -
> -                       (uintptr_t)buf) <= 0xffff);
> -               WR_ID(wr->wr_id).offset =
> -                       ((uintptr_t)rte_pktmbuf_mtod(buf, char *) -
> -                        (uintptr_t)buf);
> -               wr->num_sge = segs;
> -               /* Register segments as SGEs. */
> -               for (j = 0; (j != segs); ++j) {
> -                       struct ibv_sge *sge = &elt->sges[j];
> -                       uint32_t lkey;
> -
> -                       /* Retrieve Memory Region key for this memory pool. */
> -                       lkey = txq_mp2mr(txq, buf->pool);
> -                       if (unlikely(lkey == (uint32_t)-1)) {
> -                               /* MR does not exist. */
> -                               DEBUG("%p: unable to get MP <-> MR"
> -                                     " association", (void *)txq);
> -                               /* Clean up TX element. */
> -                               WR_ID(elt->wr.wr_id).offset = 0;
> -#ifndef NDEBUG
> -                               /* For assert(). */
> -                               while (j) {
> -                                       --j;
> -                                       --sge;
> -                                       sge->addr = 0;
> -                                       sge->length = 0;
> -                                       sge->lkey = 0;
> -                               }
> -                               wr->num_sge = 0;
> -#endif
> -                               goto stop;
> -                       }
> -                       /* Sanity checks, only relevant with debugging
> -                        * enabled. */
> -                       assert(sge->addr == 0);
> -                       assert(sge->length == 0);
> -                       assert(sge->lkey == 0);
> -                       /* Update SGE. */
> -                       sge->addr = (uintptr_t)rte_pktmbuf_mtod(buf, char *);
> -                       if (txq->priv->vf)
> -                               rte_prefetch0((volatile void *)sge->addr);
> -                       sge->length = DATA_LEN(buf);
> -                       sge->lkey = lkey;
> -#if (MLX4_PMD_MAX_INLINE > 0) || defined(MLX4_PMD_SOFT_COUNTERS)
> -                       sent_size += sge->length;
> -#endif
> -                       buf = NEXT(buf);
> -               }
> -               /* If buf is not NULL here and is not going to be linearized,
> -                * nb_segs is not valid. */
> -               assert(j == segs);
> -               assert((buf == NULL) || (linearize));
> -               /* Linearize extra segments. */
> -               if (linearize) {
> -                       struct ibv_sge *sge = &elt->sges[segs];
> -                       linear_t *linear = &(*txq->elts_linear)[elts_head];
> -                       unsigned int size = linearize_mbuf(linear, buf);
> -
> -                       assert(segs == (elemof(elt->sges) - 1));
> -                       if (size == 0) {
> -                               /* Invalid packet. */
> -                               DEBUG("%p: packet too large to be linearized.",
> -                                     (void *)txq);
> -                               /* Clean up TX element. */
> -                               WR_ID(elt->wr.wr_id).offset = 0;
> -#ifndef NDEBUG
> -                               /* For assert(). */
> -                               while (j) {
> -                                       --j;
> -                                       --sge;
> -                                       sge->addr = 0;
> -                                       sge->length = 0;
> -                                       sge->lkey = 0;
> -                               }
> -                               wr->num_sge = 0;
> -#endif
> -                               goto stop;
> -                       }
> -                       /* If MLX4_PMD_SGE_WR_N is 1, free mbuf immediately
> -                        * and clear offset from WR ID. */
> -                       if (elemof(elt->sges) == 1) {
> -                               do {
> -                                       struct rte_mbuf *next = NEXT(buf);
> -
> -                                       rte_pktmbuf_free_seg(buf);
> -                                       buf = next;
> -                               } while (buf != NULL);
> -                               WR_ID(wr->wr_id).offset = 0;
> -                       }
> -                       /* Set WR fields and fill SGE with linear buffer. */
> -                       ++wr->num_sge;
> -                       /* Sanity checks, only relevant with debugging
> -                        * enabled. */
> -                       assert(sge->addr == 0);
> -                       assert(sge->length == 0);
> -                       assert(sge->lkey == 0);
> -                       /* Update SGE. */
> -                       sge->addr = (uintptr_t)&(*linear)[0];
> -                       sge->length = size;
> -                       sge->lkey = txq->mr_linear->lkey;
> -#if (MLX4_PMD_MAX_INLINE > 0) || defined(MLX4_PMD_SOFT_COUNTERS)
> -                       sent_size += size;
> -#endif
> -               }
> -               /* Link WRs together for ibv_post_send(). */
> -               *wr_next = wr;
> -               wr_next = &wr->next;
> -#if MLX4_PMD_MAX_INLINE > 0
> -               if (sent_size <= txq->max_inline)
> -                       wr->send_flags = IBV_SEND_INLINE;
> -               else
> -#endif
> -                       wr->send_flags = 0;
> -               if (++elts_head >= elts_n)
> -                       elts_head = 0;
> -#ifdef MLX4_PMD_SOFT_COUNTERS
> -               /* Increment sent bytes counter. */
> -               txq->stats.obytes += sent_size;
> -#endif
> -       }
> -stop:
> -       /* Take a shortcut if nothing must be sent. */
> -       if (unlikely(i == 0))
> -               return 0;
> -#ifdef MLX4_PMD_SOFT_COUNTERS
> -       /* Increment sent packets counter. */
> -       txq->stats.opackets += i;
> -#endif
> -       *wr_next = NULL;
> -       /* The last WR is the only one asking for a completion event. */
> -       containerof(wr_next, mlx4_send_wr_t, next)->
> -               send_flags |= IBV_SEND_SIGNALED;
> -       err = mlx4_post_send(txq->qp, head.next, &bad_wr);
> -       if (unlikely(err)) {
> -               unsigned int unsent = 0;
> -
> -               /* An error occurred, completion event is lost. Fix counters. */
> -               while (bad_wr != NULL) {
> -                       struct txq_elt *elt =
> -                               containerof(bad_wr, struct txq_elt, wr);
> -                       mlx4_send_wr_t *wr = &elt->wr;
> -                       mlx4_send_wr_t *next = wr->next;
> -#if defined(MLX4_PMD_SOFT_COUNTERS) || !defined(NDEBUG)
> -                       unsigned int j;
> -#endif
> -
> -                       assert(wr == bad_wr);
> -                       /* Clean up TX element without freeing it, caller
> -                        * should take care of this. */
> -                       WR_ID(elt->wr.wr_id).offset = 0;
> -#ifdef MLX4_PMD_SOFT_COUNTERS
> -                       for (j = 0; ((int)j < wr->num_sge); ++j)
> -                               txq->stats.obytes -= wr->sg_list[j].length;
> -#endif
> -                       ++unsent;
> -#ifndef NDEBUG
> -                       /* For assert(). */
> -                       for (j = 0; ((int)j < wr->num_sge); ++j) {
> -                               elt->sges[j].addr = 0;
> -                               elt->sges[j].length = 0;
> -                               elt->sges[j].lkey = 0;
> -                       }
> -                       wr->next = NULL;
> -                       wr->num_sge = 0;
> -#endif
> -                       bad_wr = next;
> -               }
> -#ifdef MLX4_PMD_SOFT_COUNTERS
> -               txq->stats.opackets -= unsent;
> -#endif
> -               assert(i >= unsent);
> -               i -= unsent;
> -               /* "Unsend" remaining packets. */
> -               elts_head -= unsent;
> -               if (elts_head >= elts_n)
> -                       elts_head += elts_n;
> -               assert(elts_head < elts_n);
> -               DEBUG("%p: mlx4_post_send() failed, %u unprocessed WRs: %s",
> -                     (void *)txq, unsent,
> -                     ((err <= -1) ? "Internal error" : strerror(err)));
> -       } else
> -               ++txq->elts_comp;
> -       txq->elts_head = elts_head;
> -       return i;
> -}
> -
> -/**
> - * Configure a TX queue.
> - *
> - * @param dev
> - *   Pointer to Ethernet device structure.
> - * @param txq
> - *   Pointer to TX queue structure.
> - * @param desc
> - *   Number of descriptors to configure in queue.
> - * @param socket
> - *   NUMA socket on which memory must be allocated.
> - * @param[in] conf
> - *   Thresholds parameters.
> - *
> - * @return
> - *   0 on success, errno value on failure.
> - */
> -static int
> -txq_setup(struct rte_eth_dev *dev, struct txq *txq, uint16_t desc,
> -         unsigned int socket, const struct rte_eth_txconf *conf)
> -{
> -       struct priv *priv = dev->data->dev_private;
> -       struct txq tmpl = {
> -               .priv = priv,
> -               .socket = socket
> -       };
> -       union {
> -               struct ibv_qp_init_attr init;
> -               struct ibv_exp_qp_attr mod;
> -       } attr;
> -       int ret = 0;
> -
> -       (void)conf; /* Thresholds configuration (ignored). */
> -       if ((desc == 0) || (desc % MLX4_PMD_SGE_WR_N)) {
> -               ERROR("%p: invalid number of TX descriptors (must be a"
> -                     " multiple of %d)", (void *)dev, desc);
> -               return EINVAL;
> -       }
> -       desc /= MLX4_PMD_SGE_WR_N;
> -       /* MRs will be registered in mp2mr[] later. */
> -       tmpl.cq = ibv_create_cq(priv->ctx, desc, NULL, NULL, 0);
> -       if (tmpl.cq == NULL) {
> -               ret = ENOMEM;
> -               ERROR("%p: CQ creation failure: %s",
> -                     (void *)dev, strerror(ret));
> -               goto error;
> -       }
> -       DEBUG("priv->device_attr.max_qp_wr is %d",
> -             priv->device_attr.max_qp_wr);
> -       DEBUG("priv->device_attr.max_sge is %d",
> -             priv->device_attr.max_sge);
> -       attr.init = (struct ibv_qp_init_attr){
> -               /* CQ to be associated with the send queue. */
> -               .send_cq = tmpl.cq,
> -               /* CQ to be associated with the receive queue. */
> -               .recv_cq = tmpl.cq,
> -               .cap = {
> -                       /* Max number of outstanding WRs. */
> -                       .max_send_wr = ((priv->device_attr.max_qp_wr < desc) ?
> -                                       priv->device_attr.max_qp_wr :
> -                                       desc),
> -                       /* Max number of scatter/gather elements in a WR. */
> -                       .max_send_sge = ((priv->device_attr.max_sge <
> -                                         MLX4_PMD_SGE_WR_N) ?
> -                                        priv->device_attr.max_sge :
> -                                        MLX4_PMD_SGE_WR_N),
> -#if MLX4_PMD_MAX_INLINE > 0
> -                       .max_inline_data = MLX4_PMD_MAX_INLINE,
> -#endif
> -               },
> -               .qp_type = IBV_QPT_RAW_PACKET,
> -               /* Do *NOT* enable this, completions events are managed per
> -                * TX burst. */
> -               .sq_sig_all = 0
> -       };
> -       tmpl.qp = ibv_create_qp(priv->pd, &attr.init);
> -       if (tmpl.qp == NULL) {
> -               ret = (errno ? errno : EINVAL);
> -               ERROR("%p: QP creation failure: %s",
> -                     (void *)dev, strerror(ret));
> -               goto error;
> -       }
> -#if MLX4_PMD_MAX_INLINE > 0
> -       /* ibv_create_qp() updates this value. */
> -       tmpl.max_inline = attr.init.cap.max_inline_data;
> -#endif
> -       attr.mod = (struct ibv_exp_qp_attr){
> -               /* Move the QP to this state. */
> -               .qp_state = IBV_QPS_INIT,
> -               /* Primary port number. */
> -               .port_num = priv->port
> -       };
> -       ret = ibv_exp_modify_qp(tmpl.qp, &attr.mod,
> -                               (IBV_EXP_QP_STATE | IBV_EXP_QP_PORT));
> -       if (ret) {
> -               ERROR("%p: QP state to IBV_QPS_INIT failed: %s",
> -                     (void *)dev, strerror(ret));
> -               goto error;
> -       }
> -       ret = txq_alloc_elts(&tmpl, desc);
> -       if (ret) {
> -               ERROR("%p: TXQ allocation failed: %s",
> -                     (void *)dev, strerror(ret));
> -               goto error;
> -       }
> -       attr.mod = (struct ibv_exp_qp_attr){
> -               .qp_state = IBV_QPS_RTR
> -       };
> -       ret = ibv_exp_modify_qp(tmpl.qp, &attr.mod, IBV_EXP_QP_STATE);
> -       if (ret) {
> -               ERROR("%p: QP state to IBV_QPS_RTR failed: %s",
> -                     (void *)dev, strerror(ret));
> -               goto error;
> -       }
> -       attr.mod.qp_state = IBV_QPS_RTS;
> -       ret = ibv_exp_modify_qp(tmpl.qp, &attr.mod, IBV_EXP_QP_STATE);
> -       if (ret) {
> -               ERROR("%p: QP state to IBV_QPS_RTS failed: %s",
> -                     (void *)dev, strerror(ret));
> -               goto error;
> -       }
> -       /* Clean up txq in case we're reinitializing it. */
> -       DEBUG("%p: cleaning-up old txq just in case", (void *)txq);
> -       txq_cleanup(txq);
> -       *txq = tmpl;
> -       DEBUG("%p: txq updated with %p", (void *)txq, (void *)&tmpl);
> -       assert(ret == 0);
> -       return 0;
> -error:
> -       txq_cleanup(&tmpl);
> -       assert(ret > 0);
> -       return ret;
> -}
> -
> -/**
> - * DPDK callback to configure a TX queue.
> - *
> - * @param dev
> - *   Pointer to Ethernet device structure.
> - * @param idx
> - *   TX queue index.
> - * @param desc
> - *   Number of descriptors to configure in queue.
> - * @param socket
> - *   NUMA socket on which memory must be allocated.
> - * @param[in] conf
> - *   Thresholds parameters.
> - *
> - * @return
> - *   0 on success, negative errno value on failure.
> - */
> -static int
> -mlx4_tx_queue_setup(struct rte_eth_dev *dev, uint16_t idx, uint16_t desc,
> -                   unsigned int socket, const struct rte_eth_txconf *conf)
> -{
> -       struct priv *priv = dev->data->dev_private;
> -       struct txq *txq = (*priv->txqs)[idx];
> -       int ret;
> -
> -       priv_lock(priv);
> -       DEBUG("%p: configuring queue %u for %u descriptors",
> -             (void *)dev, idx, desc);
> -       if (idx >= priv->txqs_n) {
> -               ERROR("%p: queue index out of range (%u >= %u)",
> -                     (void *)dev, idx, priv->txqs_n);
> -               priv_unlock(priv);
> -               return -EOVERFLOW;
> -       }
> -       if (txq != NULL) {
> -               DEBUG("%p: reusing already allocated queue index %u (%p)",
> -                     (void *)dev, idx, (void *)txq);
> -               if (priv->started) {
> -                       priv_unlock(priv);
> -                       return -EEXIST;
> -               }
> -               (*priv->txqs)[idx] = NULL;
> -               txq_cleanup(txq);
> -       } else {
> -               txq = rte_calloc_socket("TXQ", 1, sizeof(*txq), 0, socket);
> -               if (txq == NULL) {
> -                       ERROR("%p: unable to allocate queue index %u",
> -                             (void *)dev, idx);
> -                       priv_unlock(priv);
> -                       return -ENOMEM;
> -               }
> -       }
> -       ret = txq_setup(dev, txq, desc, socket, conf);
> -       if (ret)
> -               rte_free(txq);
> -       else {
> -               txq->stats.idx = idx;
> -               DEBUG("%p: adding TX queue %p to list",
> -                     (void *)dev, (void *)txq);
> -               (*priv->txqs)[idx] = txq;
> -               /* Update send callback. */
> -               dev->tx_pkt_burst = mlx4_tx_burst;
> -       }
> -       priv_unlock(priv);
> -       return -ret;
> -}
> -
> -/**
> - * DPDK callback to release a TX queue.
> - *
> - * @param dpdk_txq
> - *   Generic TX queue pointer.
> - */
> -static void
> -mlx4_tx_queue_release(void *dpdk_txq)
> -{
> -       struct txq *txq = (struct txq *)dpdk_txq;
> -       struct priv *priv;
> -       unsigned int i;
> -
> -       if (txq == NULL)
> -               return;
> -       priv = txq->priv;
> -       priv_lock(priv);
> -       for (i = 0; (i != priv->txqs_n); ++i)
> -               if ((*priv->txqs)[i] == txq) {
> -                       DEBUG("%p: removing TX queue %p from list",
> -                             (void *)priv->dev, (void *)txq);
> -                       (*priv->txqs)[i] = NULL;
> -                       break;
> -               }
> -       txq_cleanup(txq);
> -       rte_free(txq);
> -       priv_unlock(priv);
> -}
> -
> -/* RX queues handling. */
> -
> -/**
> - * Allocate RX queue elements with scattered packets support.
> - *
> - * @param rxq
> - *   Pointer to RX queue structure.
> - * @param elts_n
> - *   Number of elements to allocate.
> - * @param[in] pool
> - *   If not NULL, fetch buffers from this array instead of allocating them
> - *   with rte_pktmbuf_alloc().
> - *
> - * @return
> - *   0 on success, errno value on failure.
> - */
> -static int
> -rxq_alloc_elts_sp(struct rxq *rxq, unsigned int elts_n,
> -                 struct rte_mbuf **pool)
> -{
> -       unsigned int i;
> -       struct rxq_elt_sp (*elts)[elts_n] =
> -               rte_calloc_socket("RXQ elements", 1, sizeof(*elts), 0,
> -                                 rxq->socket);
> -       int ret = 0;
> -
> -       if (elts == NULL) {
> -               ERROR("%p: can't allocate packets array", (void *)rxq);
> -               ret = ENOMEM;
> -               goto error;
> -       }
> -       /* For each WR (packet). */
> -       for (i = 0; (i != elts_n); ++i) {
> -               unsigned int j;
> -               struct rxq_elt_sp *elt = &(*elts)[i];
> -               struct ibv_recv_wr *wr = &elt->wr;
> -               struct ibv_sge (*sges)[(elemof(elt->sges))] = &elt->sges;
> -
> -               /* These two arrays must have the same size. */
> -               assert(elemof(elt->sges) == elemof(elt->bufs));
> -               /* Configure WR. */
> -               wr->wr_id = i;
> -               wr->next = &(*elts)[(i + 1)].wr;
> -               wr->sg_list = &(*sges)[0];
> -               wr->num_sge = elemof(*sges);
> -               /* For each SGE (segment). */
> -               for (j = 0; (j != elemof(elt->bufs)); ++j) {
> -                       struct ibv_sge *sge = &(*sges)[j];
> -                       struct rte_mbuf *buf;
> -
> -                       if (pool != NULL) {
> -                               buf = *(pool++);
> -                               assert(buf != NULL);
> -                               rte_pktmbuf_reset(buf);
> -                       } else
> -                               buf = rte_pktmbuf_alloc(rxq->mp);
> -                       if (buf == NULL) {
> -                               assert(pool == NULL);
> -                               ERROR("%p: empty mbuf pool", (void *)rxq);
> -                               ret = ENOMEM;
> -                               goto error;
> -                       }
> -                       elt->bufs[j] = buf;
> -                       /* Headroom is reserved by rte_pktmbuf_alloc(). */
> -                       assert(DATA_OFF(buf) == RTE_PKTMBUF_HEADROOM);
> -                       /* Buffer is supposed to be empty. */
> -                       assert(rte_pktmbuf_data_len(buf) == 0);
> -                       assert(rte_pktmbuf_pkt_len(buf) == 0);
> -                       /* sge->addr must be able to store a pointer. */
> -                       assert(sizeof(sge->addr) >= sizeof(uintptr_t));
> -                       if (j == 0) {
> -                               /* The first SGE keeps its headroom. */
> -                               sge->addr = (uintptr_t)rte_pktmbuf_mtod(buf,
> -                                                                       char *);
> -                               sge->length = (buf->buf_len -
> -                                              RTE_PKTMBUF_HEADROOM);
> -                       } else {
> -                               /* Subsequent SGEs lose theirs. */
> -                               assert(DATA_OFF(buf) == RTE_PKTMBUF_HEADROOM);
> -                               SET_DATA_OFF(buf, 0);
> -                               sge->addr = (uintptr_t)buf->buf_addr;
> -                               sge->length = buf->buf_len;
> -                       }
> -                       sge->lkey = rxq->mr->lkey;
> -                       /* Redundant check for tailroom. */
> -                       assert(sge->length == rte_pktmbuf_tailroom(buf));
> -               }
> -       }
> -       /* The last WR pointer must be NULL. */
> -       (*elts)[(i - 1)].wr.next = NULL;
> -       DEBUG("%p: allocated and configured %u WRs (%zu segments)",
> -             (void *)rxq, elts_n, (elts_n * elemof((*elts)[0].sges)));
> -       rxq->elts_n = elts_n;
> -       rxq->elts.sp = elts;
> -       assert(ret == 0);
> -       return 0;
> -error:
> -       if (elts != NULL) {
> -               assert(pool == NULL);
> -               for (i = 0; (i != elemof(*elts)); ++i) {
> -                       unsigned int j;
> -                       struct rxq_elt_sp *elt = &(*elts)[i];
> -
> -                       for (j = 0; (j != elemof(elt->bufs)); ++j) {
> -                               struct rte_mbuf *buf = elt->bufs[j];
> -
> -                               if (buf != NULL)
> -                                       rte_pktmbuf_free_seg(buf);
> -                       }
> -               }
> -               rte_free(elts);
> -       }
> -       DEBUG("%p: failed, freed everything", (void *)rxq);
> -       assert(ret > 0);
> -       return ret;
> -}
> -
> -/**
> - * Free RX queue elements with scattered packets support.
> - *
> - * @param rxq
> - *   Pointer to RX queue structure.
> - */
> -static void
> -rxq_free_elts_sp(struct rxq *rxq)
> -{
> -       unsigned int i;
> -       unsigned int elts_n = rxq->elts_n;
> -       struct rxq_elt_sp (*elts)[elts_n] = rxq->elts.sp;
> -
> -       DEBUG("%p: freeing WRs", (void *)rxq);
> -       rxq->elts_n = 0;
> -       rxq->elts.sp = NULL;
> -       if (elts == NULL)
> -               return;
> -       for (i = 0; (i != elemof(*elts)); ++i) {
> -               unsigned int j;
> -               struct rxq_elt_sp *elt = &(*elts)[i];
> -
> -               for (j = 0; (j != elemof(elt->bufs)); ++j) {
> -                       struct rte_mbuf *buf = elt->bufs[j];
> -
> -                       if (buf != NULL)
> -                               rte_pktmbuf_free_seg(buf);
> -               }
> -       }
> -       rte_free(elts);
> -}
> -
> -/**
> - * Allocate RX queue elements.
> - *
> - * @param rxq
> - *   Pointer to RX queue structure.
> - * @param elts_n
> - *   Number of elements to allocate.
> - * @param[in] pool
> - *   If not NULL, fetch buffers from this array instead of allocating them
> - *   with rte_pktmbuf_alloc().
> - *
> - * @return
> - *   0 on success, errno value on failure.
> - */
> -static int
> -rxq_alloc_elts(struct rxq *rxq, unsigned int elts_n, struct rte_mbuf **pool)
> -{
> -       unsigned int i;
> -       struct rxq_elt (*elts)[elts_n] =
> -               rte_calloc_socket("RXQ elements", 1, sizeof(*elts), 0,
> -                                 rxq->socket);
> -       int ret = 0;
> -
> -       if (elts == NULL) {
> -               ERROR("%p: can't allocate packets array", (void *)rxq);
> -               ret = ENOMEM;
> -               goto error;
> -       }
> -       /* For each WR (packet). */
> -       for (i = 0; (i != elts_n); ++i) {
> -               struct rxq_elt *elt = &(*elts)[i];
> -               struct ibv_recv_wr *wr = &elt->wr;
> -               struct ibv_sge *sge = &(*elts)[i].sge;
> -               struct rte_mbuf *buf;
> -
> -               if (pool != NULL) {
> -                       buf = *(pool++);
> -                       assert(buf != NULL);
> -                       rte_pktmbuf_reset(buf);
> -               } else
> -                       buf = rte_pktmbuf_alloc(rxq->mp);
> -               if (buf == NULL) {
> -                       assert(pool == NULL);
> -                       ERROR("%p: empty mbuf pool", (void *)rxq);
> -                       ret = ENOMEM;
> -                       goto error;
> -               }
> -               /* Configure WR. Work request ID contains its own index in
> -                * the elts array and the offset between SGE buffer header and
> -                * its data. */
> -               WR_ID(wr->wr_id).id = i;
> -               WR_ID(wr->wr_id).offset =
> -                       (((uintptr_t)buf->buf_addr + RTE_PKTMBUF_HEADROOM) -
> -                        (uintptr_t)buf);
> -               wr->next = &(*elts)[(i + 1)].wr;
> -               wr->sg_list = sge;
> -               wr->num_sge = 1;
> -               /* Headroom is reserved by rte_pktmbuf_alloc(). */
> -               assert(DATA_OFF(buf) == RTE_PKTMBUF_HEADROOM);
> -               /* Buffer is supposed to be empty. */
> -               assert(rte_pktmbuf_data_len(buf) == 0);
> -               assert(rte_pktmbuf_pkt_len(buf) == 0);
> -               /* sge->addr must be able to store a pointer. */
> -               assert(sizeof(sge->addr) >= sizeof(uintptr_t));
> -               /* SGE keeps its headroom. */
> -               sge->addr = (uintptr_t)
> -                       ((uint8_t *)buf->buf_addr + RTE_PKTMBUF_HEADROOM);
> -               sge->length = (buf->buf_len - RTE_PKTMBUF_HEADROOM);
> -               sge->lkey = rxq->mr->lkey;
> -               /* Redundant check for tailroom. */
> -               assert(sge->length == rte_pktmbuf_tailroom(buf));
> -               /* Make sure elts index and SGE mbuf pointer can be deduced
> -                * from WR ID. */
> -               if ((WR_ID(wr->wr_id).id != i) ||
> -                   ((void *)(sge->addr - WR_ID(wr->wr_id).offset) != buf)) {
> -                       ERROR("%p: cannot store index and offset in WR ID",
> -                             (void *)rxq);
> -                       sge->addr = 0;
> -                       rte_pktmbuf_free(buf);
> -                       ret = EOVERFLOW;
> -                       goto error;
> -               }
> -       }
> -       /* The last WR pointer must be NULL. */
> -       (*elts)[(i - 1)].wr.next = NULL;
> -       DEBUG("%p: allocated and configured %u single-segment WRs",
> -             (void *)rxq, elts_n);
> -       rxq->elts_n = elts_n;
> -       rxq->elts.no_sp = elts;
> -       assert(ret == 0);
> -       return 0;
> -error:
> -       if (elts != NULL) {
> -               assert(pool == NULL);
> -               for (i = 0; (i != elemof(*elts)); ++i) {
> -                       struct rxq_elt *elt = &(*elts)[i];
> -                       struct rte_mbuf *buf;
> -
> -                       if (elt->sge.addr == 0)
> -                               continue;
> -                       assert(WR_ID(elt->wr.wr_id).id == i);
> -                       buf = (void *)
> -                               (elt->sge.addr - WR_ID(elt->wr.wr_id).offset);
> -                       rte_pktmbuf_free_seg(buf);
> -               }
> -               rte_free(elts);
> -       }
> -       DEBUG("%p: failed, freed everything", (void *)rxq);
> -       assert(ret > 0);
> -       return ret;
> -}
> -
> -/**
> - * Free RX queue elements.
> - *
> - * @param rxq
> - *   Pointer to RX queue structure.
> - */
> -static void
> -rxq_free_elts(struct rxq *rxq)
> -{
> -       unsigned int i;
> -       unsigned int elts_n = rxq->elts_n;
> -       struct rxq_elt (*elts)[elts_n] = rxq->elts.no_sp;
> -
> -       DEBUG("%p: freeing WRs", (void *)rxq);
> -       rxq->elts_n = 0;
> -       rxq->elts.no_sp = NULL;
> -       if (elts == NULL)
> -               return;
> -       for (i = 0; (i != elemof(*elts)); ++i) {
> -               struct rxq_elt *elt = &(*elts)[i];
> -               struct rte_mbuf *buf;
> -
> -               if (elt->sge.addr == 0)
> -                       continue;
> -               assert(WR_ID(elt->wr.wr_id).id == i);
> -               buf = (void *)(elt->sge.addr - WR_ID(elt->wr.wr_id).offset);
> -               rte_pktmbuf_free_seg(buf);
> -       }
> -       rte_free(elts);
> -}
> -
> -/**
> - * Unregister a MAC address from a RX queue.
> - *
> - * @param rxq
> - *   Pointer to RX queue structure.
> - * @param mac_index
> - *   MAC address index.
> - */
> -static void
> -rxq_mac_addr_del(struct rxq *rxq, unsigned int mac_index)
> -{
> -#ifndef NDEBUG
> -       struct priv *priv = rxq->priv;
> -       const uint8_t (*mac)[ETHER_ADDR_LEN] =
> -               (const uint8_t (*)[ETHER_ADDR_LEN])
> -               priv->mac[mac_index].addr_bytes;
> -#endif
> -
> -       assert(mac_index < elemof(priv->mac));
> -       if (!BITFIELD_ISSET(rxq->mac_configured, mac_index)) {
> -               assert(rxq->mac_flow[mac_index] == NULL);
> -               return;
> -       }
> -       DEBUG("%p: removing MAC address %02x:%02x:%02x:%02x:%02x:%02x"
> -             " index %u",
> -             (void *)rxq,
> -             (*mac)[0], (*mac)[1], (*mac)[2], (*mac)[3], (*mac)[4], (*mac)[5],
> -             mac_index);
> -       assert(rxq->mac_flow[mac_index] != NULL);
> -       claim_zero(ibv_exp_destroy_flow(rxq->mac_flow[mac_index]));
> -       rxq->mac_flow[mac_index] = NULL;
> -       BITFIELD_RESET(rxq->mac_configured, mac_index);
> -}
> -
> -/**
> - * Unregister all MAC addresses from a RX queue.
> - *
> - * @param rxq
> - *   Pointer to RX queue structure.
> - */
> -static void
> -rxq_mac_addrs_del(struct rxq *rxq)
> -{
> -       struct priv *priv = rxq->priv;
> -       unsigned int i;
> -
> -       for (i = 0; (i != elemof(priv->mac)); ++i)
> -               rxq_mac_addr_del(rxq, i);
> -}
> -
> -static int rxq_promiscuous_enable(struct rxq *);
> -static void rxq_promiscuous_disable(struct rxq *);
> -
> -/**
> - * Register a MAC address in a RX queue.
> - *
> - * @param rxq
> - *   Pointer to RX queue structure.
> - * @param mac_index
> - *   MAC address index to register.
> - *
> - * @return
> - *   0 on success, errno value on failure.
> - */
> -static int
> -rxq_mac_addr_add(struct rxq *rxq, unsigned int mac_index)
> -{
> -       struct priv *priv = rxq->priv;
> -       const uint8_t (*mac)[ETHER_ADDR_LEN] =
> -               (const uint8_t (*)[ETHER_ADDR_LEN])
> -               priv->mac[mac_index].addr_bytes;
> -       unsigned int vlans = 0;
> -       unsigned int specs = 0;
> -       unsigned int i, j;
> -       struct ibv_exp_flow *flow;
> -
> -       assert(mac_index < elemof(priv->mac));
> -       if (BITFIELD_ISSET(rxq->mac_configured, mac_index))
> -               rxq_mac_addr_del(rxq, mac_index);
> -       /* Number of configured VLANs. */
> -       for (i = 0; (i != elemof(priv->vlan_filter)); ++i)
> -               if (priv->vlan_filter[i].enabled)
> -                       ++vlans;
> -       specs = (vlans ? vlans : 1);
> -
> -       /* Allocate flow specification on the stack. */
> -       struct ibv_exp_flow_attr data
> -               [1 +
> -                (sizeof(struct ibv_exp_flow_spec_eth[specs]) /
> -                 sizeof(struct ibv_exp_flow_attr)) +
> -                !!(sizeof(struct ibv_exp_flow_spec_eth[specs]) %
> -                   sizeof(struct ibv_exp_flow_attr))];
> -       struct ibv_exp_flow_attr *attr = (void *)&data[0];
> -       struct ibv_exp_flow_spec_eth *spec = (void *)&data[1];
> -
> -       /*
> -        * No padding must be inserted by the compiler between attr and spec.
> -        * This layout is expected by libibverbs.
> -        */
> -       assert(((uint8_t *)attr + sizeof(*attr)) == (uint8_t *)spec);
> -       *attr = (struct ibv_exp_flow_attr){
> -               .type = IBV_EXP_FLOW_ATTR_NORMAL,
> -               .num_of_specs = specs,
> -               .port = priv->port,
> -               .flags = 0
> -       };
> -       *spec = (struct ibv_exp_flow_spec_eth){
> -               .type = IBV_EXP_FLOW_SPEC_ETH,
> -               .size = sizeof(*spec),
> -               .val = {
> -                       .dst_mac = {
> -                               (*mac)[0], (*mac)[1], (*mac)[2],
> -                               (*mac)[3], (*mac)[4], (*mac)[5]
> -                       }
> -               },
> -               .mask = {
> -                       .dst_mac = "\xff\xff\xff\xff\xff\xff",
> -                       .vlan_tag = (vlans ? htons(0xfff) : 0)
> -               }
> -       };
> -       /* Fill VLAN specifications. */
> -       for (i = 0, j = 0; (i != elemof(priv->vlan_filter)); ++i) {
> -               if (!priv->vlan_filter[i].enabled)
> -                       continue;
> -               assert(j != vlans);
> -               if (j)
> -                       spec[j] = spec[0];
> -               spec[j].val.vlan_tag = htons(priv->vlan_filter[i].id);
> -               ++j;
> -       }
> -       DEBUG("%p: adding MAC address %02x:%02x:%02x:%02x:%02x:%02x index %u"
> -             " (%u VLAN(s) configured)",
> -             (void *)rxq,
> -             (*mac)[0], (*mac)[1], (*mac)[2], (*mac)[3], (*mac)[4], (*mac)[5],
> -             mac_index,
> -             vlans);
> -       /* Create related flow. */
> -       errno = 0;
> -       flow = ibv_exp_create_flow(rxq->qp, attr);
> -       if (flow == NULL) {
> -               int err = errno;
> -
> -               /* Flow creation failure is not fatal when in DMFS A0 mode.
> -                * Ignore error if promiscuity is already enabled or can be
> -                * enabled. */
> -               if (priv->promisc_ok)
> -                       return 0;
> -               if ((rxq->promisc_flow != NULL) ||
> -                   (rxq_promiscuous_enable(rxq) == 0)) {
> -                       if (rxq->promisc_flow != NULL)
> -                               rxq_promiscuous_disable(rxq);
> -                       WARN("cannot configure normal flow but promiscuous"
> -                            " mode is fine, assuming promiscuous optimization"
> -                            " is enabled"
> -                            " (options mlx4_core log_num_mgm_entry_size=-7)");
> -                       priv->promisc_ok = 1;
> -                       return 0;
> -               }
> -               errno = err;
> -               /* It's not clear whether errno is always set in this case. */
> -               ERROR("%p: flow configuration failed, errno=%d: %s",
> -                     (void *)rxq, errno,
> -                     (errno ? strerror(errno) : "Unknown error"));
> -               if (errno)
> -                       return errno;
> -               return EINVAL;
> -       }
> -       assert(rxq->mac_flow[mac_index] == NULL);
> -       rxq->mac_flow[mac_index] = flow;
> -       BITFIELD_SET(rxq->mac_configured, mac_index);
> -       return 0;
> -}
> -
> -/**
> - * Register all MAC addresses in a RX queue.
> - *
> - * @param rxq
> - *   Pointer to RX queue structure.
> - *
> - * @return
> - *   0 on success, errno value on failure.
> - */
> -static int
> -rxq_mac_addrs_add(struct rxq *rxq)
> -{
> -       struct priv *priv = rxq->priv;
> -       unsigned int i;
> -       int ret;
> -
> -       for (i = 0; (i != elemof(priv->mac)); ++i) {
> -               if (!BITFIELD_ISSET(priv->mac_configured, i))
> -                       continue;
> -               ret = rxq_mac_addr_add(rxq, i);
> -               if (!ret)
> -                       continue;
> -               /* Failure, rollback. */
> -               while (i != 0)
> -                       rxq_mac_addr_del(rxq, --i);
> -               assert(ret > 0);
> -               return ret;
> -       }
> -       return 0;
> -}
> -
> -/**
> - * Unregister a MAC address.
> - *
> - * In RSS mode, the MAC address is unregistered from the parent queue,
> - * otherwise it is unregistered from each queue directly.
> - *
> - * @param priv
> - *   Pointer to private structure.
> - * @param mac_index
> - *   MAC address index.
> - */
> -static void
> -priv_mac_addr_del(struct priv *priv, unsigned int mac_index)
> -{
> -       unsigned int i;
> -
> -       assert(mac_index < elemof(priv->mac));
> -       if (!BITFIELD_ISSET(priv->mac_configured, mac_index))
> -               return;
> -       if (priv->rss) {
> -               rxq_mac_addr_del(&priv->rxq_parent, mac_index);
> -               goto end;
> -       }
> -       for (i = 0; (i != priv->dev->data->nb_rx_queues); ++i)
> -               rxq_mac_addr_del((*priv->rxqs)[i], mac_index);
> -end:
> -       BITFIELD_RESET(priv->mac_configured, mac_index);
> -}
> -
> -/**
> - * Register a MAC address.
> - *
> - * In RSS mode, the MAC address is registered in the parent queue,
> - * otherwise it is registered in each queue directly.
> - *
> - * @param priv
> - *   Pointer to private structure.
> - * @param mac_index
> - *   MAC address index to use.
> - * @param mac
> - *   MAC address to register.
> - *
> - * @return
> - *   0 on success, errno value on failure.
> - */
> -static int
> -priv_mac_addr_add(struct priv *priv, unsigned int mac_index,
> -                 const uint8_t (*mac)[ETHER_ADDR_LEN])
> -{
> -       unsigned int i;
> -       int ret;
> -
> -       assert(mac_index < elemof(priv->mac));
> -       /* First, make sure this address isn't already configured. */
> -       for (i = 0; (i != elemof(priv->mac)); ++i) {
> -               /* Skip this index, it's going to be reconfigured. */
> -               if (i == mac_index)
> -                       continue;
> -               if (!BITFIELD_ISSET(priv->mac_configured, i))
> -                       continue;
> -               if (memcmp(priv->mac[i].addr_bytes, *mac, sizeof(*mac)))
> -                       continue;
> -               /* Address already configured elsewhere, return with error. */
> -               return EADDRINUSE;
> -       }
> -       if (BITFIELD_ISSET(priv->mac_configured, mac_index))
> -               priv_mac_addr_del(priv, mac_index);
> -       priv->mac[mac_index] = (struct ether_addr){
> -               {
> -                       (*mac)[0], (*mac)[1], (*mac)[2],
> -                       (*mac)[3], (*mac)[4], (*mac)[5]
> -               }
> -       };
> -       /* If device isn't started, this is all we need to do. */
> -       if (!priv->started) {
> -#ifndef NDEBUG
> -               /* Verify that all queues have this index disabled. */
> -               for (i = 0; (i != priv->rxqs_n); ++i) {
> -                       if ((*priv->rxqs)[i] == NULL)
> -                               continue;
> -                       assert(!BITFIELD_ISSET
> -                              ((*priv->rxqs)[i]->mac_configured, mac_index));
> -               }
> -#endif
> -               goto end;
> -       }
> -       if (priv->rss) {
> -               ret = rxq_mac_addr_add(&priv->rxq_parent, mac_index);
> -               if (ret)
> -                       return ret;
> -               goto end;
> -       }
> -       for (i = 0; (i != priv->rxqs_n); ++i) {
> -               if ((*priv->rxqs)[i] == NULL)
> -                       continue;
> -               ret = rxq_mac_addr_add((*priv->rxqs)[i], mac_index);
> -               if (!ret)
> -                       continue;
> -               /* Failure, rollback. */
> -               while (i != 0)
> -                       if ((*priv->rxqs)[(--i)] != NULL)
> -                               rxq_mac_addr_del((*priv->rxqs)[i], mac_index);
> -               return ret;
> -       }
> -end:
> -       BITFIELD_SET(priv->mac_configured, mac_index);
> -       return 0;
> -}
> -
> -/**
> - * Enable allmulti mode in a RX queue.
> - *
> - * @param rxq
> - *   Pointer to RX queue structure.
> - *
> - * @return
> - *   0 on success, errno value on failure.
> - */
> -static int
> -rxq_allmulticast_enable(struct rxq *rxq)
> -{
> -       struct ibv_exp_flow *flow;
> -       struct ibv_exp_flow_attr attr = {
> -               .type = IBV_EXP_FLOW_ATTR_MC_DEFAULT,
> -               .num_of_specs = 0,
> -               .port = rxq->priv->port,
> -               .flags = 0
> -       };
> -
> -       DEBUG("%p: enabling allmulticast mode", (void *)rxq);
> -       if (rxq->allmulti_flow != NULL)
> -               return EBUSY;
> -       errno = 0;
> -       flow = ibv_exp_create_flow(rxq->qp, &attr);
> -       if (flow == NULL) {
> -               /* It's not clear whether errno is always set in this case. */
> -               ERROR("%p: flow configuration failed, errno=%d: %s",
> -                     (void *)rxq, errno,
> -                     (errno ? strerror(errno) : "Unknown error"));
> -               if (errno)
> -                       return errno;
> -               return EINVAL;
> -       }
> -       rxq->allmulti_flow = flow;
> -       DEBUG("%p: allmulticast mode enabled", (void *)rxq);
> -       return 0;
> -}
> -
> -/**
> - * Disable allmulti mode in a RX queue.
> - *
> - * @param rxq
> - *   Pointer to RX queue structure.
> - */
> -static void
> -rxq_allmulticast_disable(struct rxq *rxq)
> -{
> -       DEBUG("%p: disabling allmulticast mode", (void *)rxq);
> -       if (rxq->allmulti_flow == NULL)
> -               return;
> -       claim_zero(ibv_exp_destroy_flow(rxq->allmulti_flow));
> -       rxq->allmulti_flow = NULL;
> -       DEBUG("%p: allmulticast mode disabled", (void *)rxq);
> -}
> -
> -/**
> - * Enable promiscuous mode in a RX queue.
> - *
> - * @param rxq
> - *   Pointer to RX queue structure.
> - *
> - * @return
> - *   0 on success, errno value on failure.
> - */
> -static int
> -rxq_promiscuous_enable(struct rxq *rxq)
> -{
> -       struct ibv_exp_flow *flow;
> -       struct ibv_exp_flow_attr attr = {
> -               .type = IBV_EXP_FLOW_ATTR_ALL_DEFAULT,
> -               .num_of_specs = 0,
> -               .port = rxq->priv->port,
> -               .flags = 0
> -       };
> -
> -       if (rxq->priv->vf)
> -               return 0;
> -       DEBUG("%p: enabling promiscuous mode", (void *)rxq);
> -       if (rxq->promisc_flow != NULL)
> -               return EBUSY;
> -       errno = 0;
> -       flow = ibv_exp_create_flow(rxq->qp, &attr);
> -       if (flow == NULL) {
> -               /* It's not clear whether errno is always set in this case. */
> -               ERROR("%p: flow configuration failed, errno=%d: %s",
> -                     (void *)rxq, errno,
> -                     (errno ? strerror(errno) : "Unknown error"));
> -               if (errno)
> -                       return errno;
> -               return EINVAL;
> -       }
> -       rxq->promisc_flow = flow;
> -       DEBUG("%p: promiscuous mode enabled", (void *)rxq);
> -       return 0;
> -}
> -
> -/**
> - * Disable promiscuous mode in a RX queue.
> - *
> - * @param rxq
> - *   Pointer to RX queue structure.
> - */
> -static void
> -rxq_promiscuous_disable(struct rxq *rxq)
> -{
> -       if (rxq->priv->vf)
> -               return;
> -       DEBUG("%p: disabling promiscuous mode", (void *)rxq);
> -       if (rxq->promisc_flow == NULL)
> -               return;
> -       claim_zero(ibv_exp_destroy_flow(rxq->promisc_flow));
> -       rxq->promisc_flow = NULL;
> -       DEBUG("%p: promiscuous mode disabled", (void *)rxq);
> -}
> -
> -/**
> - * Clean up a RX queue.
> - *
> - * Destroy objects, free allocated memory and reset the structure for reuse.
> - *
> - * @param rxq
> - *   Pointer to RX queue structure.
> - */
> -static void
> -rxq_cleanup(struct rxq *rxq)
> -{
> -       DEBUG("cleaning up %p", (void *)rxq);
> -       if (rxq->sp)
> -               rxq_free_elts_sp(rxq);
> -       else
> -               rxq_free_elts(rxq);
> -       if (rxq->qp != NULL) {
> -               rxq_promiscuous_disable(rxq);
> -               rxq_allmulticast_disable(rxq);
> -               rxq_mac_addrs_del(rxq);
> -               claim_zero(ibv_destroy_qp(rxq->qp));
> -       }
> -       if (rxq->cq != NULL)
> -               claim_zero(ibv_destroy_cq(rxq->cq));
> -       if (rxq->mr != NULL)
> -               claim_zero(ibv_dereg_mr(rxq->mr));
> -       memset(rxq, 0, sizeof(*rxq));
> -}
> -
> -static uint16_t
> -mlx4_rx_burst(void *dpdk_rxq, struct rte_mbuf **pkts, uint16_t pkts_n);
> -
> -/**
> - * DPDK callback for RX with scattered packets support.
> - *
> - * @param dpdk_rxq
> - *   Generic pointer to RX queue structure.
> - * @param[out] pkts
> - *   Array to store received packets.
> - * @param pkts_n
> - *   Maximum number of packets in array.
> - *
> - * @return
> - *   Number of packets successfully received (<= pkts_n).
> - */
> -static uint16_t
> -mlx4_rx_burst_sp(void *dpdk_rxq, struct rte_mbuf **pkts, uint16_t pkts_n)
> -{
> -       struct rxq *rxq = (struct rxq *)dpdk_rxq;
> -       struct rxq_elt_sp (*elts)[rxq->elts_n] = rxq->elts.sp;
> -       struct ibv_wc wcs[pkts_n];
> -       struct ibv_recv_wr head;
> -       struct ibv_recv_wr **next = &head.next;
> -       struct ibv_recv_wr *bad_wr;
> -       int ret = 0;
> -       int wcs_n;
> -       int i;
> -
> -       if (unlikely(!rxq->sp))
> -               return mlx4_rx_burst(dpdk_rxq, pkts, pkts_n);
> -       if (unlikely(elts == NULL)) /* See RTE_DEV_CMD_SET_MTU. */
> -               return 0;
> -       wcs_n = ibv_poll_cq(rxq->cq, pkts_n, wcs);
> -       if (unlikely(wcs_n == 0))
> -               return 0;
> -       if (unlikely(wcs_n < 0)) {
> -               DEBUG("rxq=%p, ibv_poll_cq() failed (wc_n=%d)",
> -                     (void *)rxq, wcs_n);
> -               return 0;
> -       }
> -       assert(wcs_n <= (int)pkts_n);
> -       /* For each work completion. */
> -       for (i = 0; (i != wcs_n); ++i) {
> -               struct ibv_wc *wc = &wcs[i];
> -               uint64_t wr_id = wc->wr_id;
> -               uint32_t len = wc->byte_len;
> -               struct rxq_elt_sp *elt = &(*elts)[wr_id];
> -               struct ibv_recv_wr *wr = &elt->wr;
> -               struct rte_mbuf *pkt_buf = NULL; /* Buffer returned in pkts. */
> -               struct rte_mbuf **pkt_buf_next = &pkt_buf;
> -               unsigned int seg_headroom = RTE_PKTMBUF_HEADROOM;
> -               unsigned int j = 0;
> -
> -               /* Sanity checks. */
> -               assert(wr_id < rxq->elts_n);
> -               assert(wr_id == wr->wr_id);
> -               assert(wr->sg_list == elt->sges);
> -               assert(wr->num_sge == elemof(elt->sges));
> -               /* Link completed WRs together for repost. */
> -               *next = wr;
> -               next = &wr->next;
> -               if (unlikely(wc->status != IBV_WC_SUCCESS)) {
> -                       /* Whatever, just repost the offending WR. */
> -                       DEBUG("rxq=%p, wr_id=%" PRIu64 ": bad work completion"
> -                             " status (%d): %s",
> -                             (void *)rxq, wc->wr_id, wc->status,
> -                             ibv_wc_status_str(wc->status));
> -#ifdef MLX4_PMD_SOFT_COUNTERS
> -                       /* Increase dropped packets counter. */
> -                       ++rxq->stats.idropped;
> -#endif
> -                       goto repost;
> -               }
> -               /*
> -                * Replace spent segments with new ones, concatenate and
> -                * return them as pkt_buf.
> -                */
> -               while (1) {
> -                       struct ibv_sge *sge = &elt->sges[j];
> -                       struct rte_mbuf *seg = elt->bufs[j];
> -                       struct rte_mbuf *rep;
> -                       unsigned int seg_tailroom;
> -
> -                       /*
> -                        * Fetch initial bytes of packet descriptor into a
> -                        * cacheline while allocating rep.
> -                        */
> -                       rte_prefetch0(seg);
> -                       rep = __rte_mbuf_raw_alloc(rxq->mp);
> -                       if (unlikely(rep == NULL)) {
> -                               /*
> -                                * Unable to allocate a replacement mbuf,
> -                                * repost WR.
> -                                */
> -                               DEBUG("rxq=%p, wr_id=%" PRIu64 ":"
> -                                     " can't allocate a new mbuf",
> -                                     (void *)rxq, wr_id);
> -                               if (pkt_buf != NULL)
> -                                       rte_pktmbuf_free(pkt_buf);
> -                               /* Increase out of memory counters. */
> -                               ++rxq->stats.rx_nombuf;
> -                               ++rxq->priv->dev->data->rx_mbuf_alloc_failed;
> -                               goto repost;
> -                       }
> -#ifndef NDEBUG
> -                       /* Poison user-modifiable fields in rep. */
> -                       NEXT(rep) = (void *)((uintptr_t)-1);
> -                       SET_DATA_OFF(rep, 0xdead);
> -                       DATA_LEN(rep) = 0xd00d;
> -                       PKT_LEN(rep) = 0xdeadd00d;
> -                       NB_SEGS(rep) = 0x2a;
> -                       PORT(rep) = 0x2a;
> -                       rep->ol_flags = -1;
> -#endif
> -                       assert(rep->buf_len == seg->buf_len);
> -                       assert(rep->buf_len == rxq->mb_len);
> -                       /* Reconfigure sge to use rep instead of seg. */
> -                       assert(sge->lkey == rxq->mr->lkey);
> -                       sge->addr = ((uintptr_t)rep->buf_addr + seg_headroom);
> -                       elt->bufs[j] = rep;
> -                       ++j;
> -                       /* Update pkt_buf if it's the first segment, or link
> -                        * seg to the previous one and update pkt_buf_next. */
> -                       *pkt_buf_next = seg;
> -                       pkt_buf_next = &NEXT(seg);
> -                       /* Update seg information. */
> -                       seg_tailroom = (seg->buf_len - seg_headroom);
> -                       assert(sge->length == seg_tailroom);
> -                       SET_DATA_OFF(seg, seg_headroom);
> -                       if (likely(len <= seg_tailroom)) {
> -                               /* Last segment. */
> -                               DATA_LEN(seg) = len;
> -                               PKT_LEN(seg) = len;
> -                               /* Sanity check. */
> -                               assert(rte_pktmbuf_headroom(seg) ==
> -                                      seg_headroom);
> -                               assert(rte_pktmbuf_tailroom(seg) ==
> -                                      (seg_tailroom - len));
> -                               break;
> -                       }
> -                       DATA_LEN(seg) = seg_tailroom;
> -                       PKT_LEN(seg) = seg_tailroom;
> -                       /* Sanity check. */
> -                       assert(rte_pktmbuf_headroom(seg) == seg_headroom);
> -                       assert(rte_pktmbuf_tailroom(seg) == 0);
> -                       /* Fix len and clear headroom for next segments. */
> -                       len -= seg_tailroom;
> -                       seg_headroom = 0;
> -               }
> -               /* Update head and tail segments. */
> -               *pkt_buf_next = NULL;
> -               assert(pkt_buf != NULL);
> -               assert(j != 0);
> -               NB_SEGS(pkt_buf) = j;
> -               PORT(pkt_buf) = rxq->port_id;
> -               PKT_LEN(pkt_buf) = wc->byte_len;
> -               pkt_buf->ol_flags = 0;
> -
> -               /* Return packet. */
> -               *(pkts++) = pkt_buf;
> -               ++ret;
> -#ifdef MLX4_PMD_SOFT_COUNTERS
> -               /* Increase bytes counter. */
> -               rxq->stats.ibytes += wc->byte_len;
> -#endif
> -repost:
> -               continue;
> -       }
> -       *next = NULL;
> -       /* Repost WRs. */
> -#ifdef DEBUG_RECV
> -       DEBUG("%p: reposting %d WRs starting from %" PRIu64 " (%p)",
> -             (void *)rxq, wcs_n, wcs[0].wr_id, (void *)head.next);
> -#endif
> -       i = ibv_post_recv(rxq->qp, head.next, &bad_wr);
> -       if (unlikely(i)) {
> -               /* Inability to repost WRs is fatal. */
> -               DEBUG("%p: ibv_post_recv(): failed for WR %p: %s",
> -                     (void *)rxq->priv,
> -                     (void *)bad_wr,
> -                     strerror(i));
> -               abort();
> -       }
> -#ifdef MLX4_PMD_SOFT_COUNTERS
> -       /* Increase packets counter. */
> -       rxq->stats.ipackets += ret;
> -#endif
> -       return ret;
> -}
> -
> -/**
> - * DPDK callback for RX.
> - *
> - * The following function is the same as mlx4_rx_burst_sp(), except it doesn't
> - * manage scattered packets. Improves performance when MRU is lower than the
> - * size of the first segment.
> - *
> - * @param dpdk_rxq
> - *   Generic pointer to RX queue structure.
> - * @param[out] pkts
> - *   Array to store received packets.
> - * @param pkts_n
> - *   Maximum number of packets in array.
> - *
> - * @return
> - *   Number of packets successfully received (<= pkts_n).
> - */
> -static uint16_t
> -mlx4_rx_burst(void *dpdk_rxq, struct rte_mbuf **pkts, uint16_t pkts_n)
> -{
> -       struct rxq *rxq = (struct rxq *)dpdk_rxq;
> -       struct rxq_elt (*elts)[rxq->elts_n] = rxq->elts.no_sp;
> -       struct ibv_wc wcs[pkts_n];
> -       struct ibv_recv_wr head;
> -       struct ibv_recv_wr **next = &head.next;
> -       struct ibv_recv_wr *bad_wr;
> -       int ret = 0;
> -       int wcs_n;
> -       int i;
> -
> -       if (unlikely(rxq->sp))
> -               return mlx4_rx_burst_sp(dpdk_rxq, pkts, pkts_n);
> -       wcs_n = ibv_poll_cq(rxq->cq, pkts_n, wcs);
> -       if (unlikely(wcs_n == 0))
> -               return 0;
> -       if (unlikely(wcs_n < 0)) {
> -               DEBUG("rxq=%p, ibv_poll_cq() failed (wc_n=%d)",
> -                     (void *)rxq, wcs_n);
> -               return 0;
> -       }
> -       assert(wcs_n <= (int)pkts_n);
> -       /* For each work completion. */
> -       for (i = 0; (i != wcs_n); ++i) {
> -               struct ibv_wc *wc = &wcs[i];
> -               uint64_t wr_id = wc->wr_id;
> -               uint32_t len = wc->byte_len;
> -               struct rxq_elt *elt = &(*elts)[WR_ID(wr_id).id];
> -               struct ibv_recv_wr *wr = &elt->wr;
> -               struct rte_mbuf *seg =
> -                       (void *)(elt->sge.addr - WR_ID(wr_id).offset);
> -               struct rte_mbuf *rep;
> -
> -               /* Sanity checks. */
> -               assert(WR_ID(wr_id).id < rxq->elts_n);
> -               assert(wr_id == wr->wr_id);
> -               assert(wr->sg_list == &elt->sge);
> -               assert(wr->num_sge == 1);
> -               /* Link completed WRs together for repost. */
> -               *next = wr;
> -               next = &wr->next;
> -               if (unlikely(wc->status != IBV_WC_SUCCESS)) {
> -                       /* Whatever, just repost the offending WR. */
> -                       DEBUG("rxq=%p, wr_id=%" PRIu32 ": bad work completion"
> -                             " status (%d): %s",
> -                             (void *)rxq, WR_ID(wr_id).id, wc->status,
> -                             ibv_wc_status_str(wc->status));
> -#ifdef MLX4_PMD_SOFT_COUNTERS
> -                       /* Increase dropped packets counter. */
> -                       ++rxq->stats.idropped;
> -#endif
> -                       goto repost;
> -               }
> -               /*
> -                * Fetch initial bytes of packet descriptor into a
> -                * cacheline while allocating rep.
> -                */
> -               rte_prefetch0(seg);
> -               rep = __rte_mbuf_raw_alloc(rxq->mp);
> -               if (unlikely(rep == NULL)) {
> -                       /*
> -                        * Unable to allocate a replacement mbuf,
> -                        * repost WR.
> -                        */
> -                       DEBUG("rxq=%p, wr_id=%" PRIu32 ":"
> -                             " can't allocate a new mbuf",
> -                             (void *)rxq, WR_ID(wr_id).id);
> -                       /* Increase out of memory counters. */
> -                       ++rxq->stats.rx_nombuf;
> -                       ++rxq->priv->dev->data->rx_mbuf_alloc_failed;
> -                       goto repost;
> -               }
> -
> -               /* Reconfigure sge to use rep instead of seg. */
> -               elt->sge.addr = (uintptr_t)rep->buf_addr + RTE_PKTMBUF_HEADROOM;
> -               assert(elt->sge.lkey == rxq->mr->lkey);
> -               WR_ID(wr->wr_id).offset =
> -                       (((uintptr_t)rep->buf_addr + RTE_PKTMBUF_HEADROOM) -
> -                        (uintptr_t)rep);
> -               assert(WR_ID(wr->wr_id).id == WR_ID(wr_id).id);
> -
> -               /* Update seg information. */
> -               SET_DATA_OFF(seg, RTE_PKTMBUF_HEADROOM);
> -               NB_SEGS(seg) = 1;
> -               PORT(seg) = rxq->port_id;
> -               NEXT(seg) = NULL;
> -               PKT_LEN(seg) = len;
> -               DATA_LEN(seg) = len;
> -               seg->ol_flags = 0;
> -
> -               /* Return packet. */
> -               *(pkts++) = seg;
> -               ++ret;
> -#ifdef MLX4_PMD_SOFT_COUNTERS
> -               /* Increase bytes counter. */
> -               rxq->stats.ibytes += wc->byte_len;
> -#endif
> -repost:
> -               continue;
> -       }
> -       *next = NULL;
> -       /* Repost WRs. */
> -#ifdef DEBUG_RECV
> -       DEBUG("%p: reposting %d WRs starting from %" PRIu32 " (%p)",
> -             (void *)rxq, wcs_n, WR_ID(wcs[0].wr_id).id, (void *)head.next);
> -#endif
> -       i = ibv_post_recv(rxq->qp, head.next, &bad_wr);
> -       if (unlikely(i)) {
> -               /* Inability to repost WRs is fatal. */
> -               DEBUG("%p: ibv_post_recv(): failed for WR %p: %s",
> -                     (void *)rxq->priv,
> -                     (void *)bad_wr,
> -                     strerror(i));
> -               abort();
> -       }
> -#ifdef MLX4_PMD_SOFT_COUNTERS
> -       /* Increase packets counter. */
> -       rxq->stats.ipackets += ret;
> -#endif
> -       return ret;
> -}
> -
> -#ifdef INLINE_RECV
> -
> -/**
> - * Allocate a Queue Pair in case inline receive is supported.
> - *
> - * @param priv
> - *   Pointer to private structure.
> - * @param cq
> - *   Completion queue to associate with QP.
> - * @param desc
> - *   Number of descriptors in QP (hint only).
> - *
> - * @return
> - *   QP pointer or NULL in case of error.
> - */
> -static struct ibv_qp *
> -rxq_setup_qp(struct priv *priv, struct ibv_cq *cq, uint16_t desc)
> -{
> -       struct ibv_exp_qp_init_attr attr = {
> -               /* CQ to be associated with the send queue. */
> -               .send_cq = cq,
> -               /* CQ to be associated with the receive queue. */
> -               .recv_cq = cq,
> -               .max_inl_recv = priv->inl_recv_size,
> -               .cap = {
> -                       /* Max number of outstanding WRs. */
> -                       .max_recv_wr = ((priv->device_attr.max_qp_wr < desc) ?
> -                                       priv->device_attr.max_qp_wr :
> -                                       desc),
> -                       /* Max number of scatter/gather elements in a WR. */
> -                       .max_recv_sge = ((priv->device_attr.max_sge <
> -                                         MLX4_PMD_SGE_WR_N) ?
> -                                        priv->device_attr.max_sge :
> -                                        MLX4_PMD_SGE_WR_N),
> -               },
> -               .qp_type = IBV_QPT_RAW_PACKET,
> -               .pd = priv->pd
> -       };
> -
> -       attr.comp_mask = IBV_EXP_QP_INIT_ATTR_PD;
> -       attr.comp_mask |= IBV_EXP_QP_INIT_ATTR_INL_RECV;
> -
> -       return ibv_exp_create_qp(priv->ctx, &attr);
> -}
> -
> -#else /* INLINE_RECV */
> -
> -/**
> - * Allocate a Queue Pair.
> - *
> - * @param priv
> - *   Pointer to private structure.
> - * @param cq
> - *   Completion queue to associate with QP.
> - * @param desc
> - *   Number of descriptors in QP (hint only).
> - *
> - * @return
> - *   QP pointer or NULL in case of error.
> - */
> -static struct ibv_qp *
> -rxq_setup_qp(struct priv *priv, struct ibv_cq *cq, uint16_t desc)
> -{
> -       struct ibv_qp_init_attr attr = {
> -               /* CQ to be associated with the send queue. */
> -               .send_cq = cq,
> -               /* CQ to be associated with the receive queue. */
> -               .recv_cq = cq,
> -               .cap = {
> -                       /* Max number of outstanding WRs. */
> -                       .max_recv_wr = ((priv->device_attr.max_qp_wr < desc) ?
> -                                       priv->device_attr.max_qp_wr :
> -                                       desc),
> -                       /* Max number of scatter/gather elements in a WR. */
> -                       .max_recv_sge = ((priv->device_attr.max_sge <
> -                                         MLX4_PMD_SGE_WR_N) ?
> -                                        priv->device_attr.max_sge :
> -                                        MLX4_PMD_SGE_WR_N),
> -               },
> -               .qp_type = IBV_QPT_RAW_PACKET
> -       };
> -
> -       return ibv_create_qp(priv->pd, &attr);
> -}
> -
> -#endif /* INLINE_RECV */
> -
> -#ifdef RSS_SUPPORT
> -
> -/**
> - * Allocate a RSS Queue Pair.
> - *
> - * @param priv
> - *   Pointer to private structure.
> - * @param cq
> - *   Completion queue to associate with QP.
> - * @param desc
> - *   Number of descriptors in QP (hint only).
> - * @param parent
> - *   If nonzero, create a parent QP, otherwise a child.
> - *
> - * @return
> - *   QP pointer or NULL in case of error.
> - */
> -static struct ibv_qp *
> -rxq_setup_qp_rss(struct priv *priv, struct ibv_cq *cq, uint16_t desc,
> -                int parent)
> -{
> -       struct ibv_exp_qp_init_attr attr = {
> -               /* CQ to be associated with the send queue. */
> -               .send_cq = cq,
> -               /* CQ to be associated with the receive queue. */
> -               .recv_cq = cq,
> -#ifdef INLINE_RECV
> -               .max_inl_recv = priv->inl_recv_size,
> -#endif
> -               .cap = {
> -                       /* Max number of outstanding WRs. */
> -                       .max_recv_wr = ((priv->device_attr.max_qp_wr < desc) ?
> -                                       priv->device_attr.max_qp_wr :
> -                                       desc),
> -                       /* Max number of scatter/gather elements in a WR. */
> -                       .max_recv_sge = ((priv->device_attr.max_sge <
> -                                         MLX4_PMD_SGE_WR_N) ?
> -                                        priv->device_attr.max_sge :
> -                                        MLX4_PMD_SGE_WR_N),
> -               },
> -               .qp_type = IBV_QPT_RAW_PACKET,
> -               .comp_mask = (IBV_EXP_QP_INIT_ATTR_PD |
> -                             IBV_EXP_QP_INIT_ATTR_QPG),
> -               .pd = priv->pd
> -       };
> -
> -#ifdef INLINE_RECV
> -       attr.comp_mask |= IBV_EXP_QP_INIT_ATTR_INL_RECV;
> -#endif
> -       if (parent) {
> -               attr.qpg.qpg_type = IBV_EXP_QPG_PARENT;
> -               /* TSS isn't necessary. */
> -               attr.qpg.parent_attrib.tss_child_count = 0;
> -               attr.qpg.parent_attrib.rss_child_count = priv->rxqs_n;
> -               DEBUG("initializing parent RSS queue");
> -       } else {
> -               attr.qpg.qpg_type = IBV_EXP_QPG_CHILD_RX;
> -               attr.qpg.qpg_parent = priv->rxq_parent.qp;
> -               DEBUG("initializing child RSS queue");
> -       }
> -       return ibv_exp_create_qp(priv->ctx, &attr);
> -}
> -
> -#endif /* RSS_SUPPORT */
> -
> -/**
> - * Reconfigure a RX queue with new parameters.
> - *
> - * rxq_rehash() does not allocate mbufs, which, if not done from the right
> - * thread (such as a control thread), may corrupt the pool.
> - * In case of failure, the queue is left untouched.
> - *
> - * @param dev
> - *   Pointer to Ethernet device structure.
> - * @param rxq
> - *   RX queue pointer.
> - *
> - * @return
> - *   0 on success, errno value on failure.
> - */
> -static int
> -rxq_rehash(struct rte_eth_dev *dev, struct rxq *rxq)
> -{
> -       struct priv *priv = rxq->priv;
> -       struct rxq tmpl = *rxq;
> -       unsigned int mbuf_n;
> -       unsigned int desc_n;
> -       struct rte_mbuf **pool;
> -       unsigned int i, k;
> -       struct ibv_exp_qp_attr mod;
> -       struct ibv_recv_wr *bad_wr;
> -       int err;
> -       int parent = (rxq == &priv->rxq_parent);
> -
> -       if (parent) {
> -               ERROR("%p: cannot rehash parent queue %p",
> -                     (void *)dev, (void *)rxq);
> -               return EINVAL;
> -       }
> -       DEBUG("%p: rehashing queue %p", (void *)dev, (void *)rxq);
> -       /* Number of descriptors and mbufs currently allocated. */
> -       desc_n = (tmpl.elts_n * (tmpl.sp ? MLX4_PMD_SGE_WR_N : 1));
> -       mbuf_n = desc_n;
> -       /* Enable scattered packets support for this queue if necessary. */
> -       if ((dev->data->dev_conf.rxmode.jumbo_frame) &&
> -           (dev->data->dev_conf.rxmode.max_rx_pkt_len >
> -            (tmpl.mb_len - RTE_PKTMBUF_HEADROOM))) {
> -               tmpl.sp = 1;
> -               desc_n /= MLX4_PMD_SGE_WR_N;
> -       } else
> -               tmpl.sp = 0;
> -       DEBUG("%p: %s scattered packets support (%u WRs)",
> -             (void *)dev, (tmpl.sp ? "enabling" : "disabling"), desc_n);
> -       /* If scatter mode is the same as before, nothing to do. */
> -       if (tmpl.sp == rxq->sp) {
> -               DEBUG("%p: nothing to do", (void *)dev);
> -               return 0;
> -       }
> -       /* Remove attached flows if RSS is disabled (no parent queue). */
> -       if (!priv->rss) {
> -               rxq_allmulticast_disable(&tmpl);
> -               rxq_promiscuous_disable(&tmpl);
> -               rxq_mac_addrs_del(&tmpl);
> -               /* Update original queue in case of failure. */
> -               rxq->allmulti_flow = tmpl.allmulti_flow;
> -               rxq->promisc_flow = tmpl.promisc_flow;
> -               memcpy(rxq->mac_configured, tmpl.mac_configured,
> -                      sizeof(rxq->mac_configured));
> -               memcpy(rxq->mac_flow, tmpl.mac_flow, sizeof(rxq->mac_flow));
> -       }
> -       /* From now on, any failure will render the queue unusable.
> -        * Reinitialize QP. */
> -       mod = (struct ibv_exp_qp_attr){ .qp_state = IBV_QPS_RESET };
> -       err = ibv_exp_modify_qp(tmpl.qp, &mod, IBV_EXP_QP_STATE);
> -       if (err) {
> -               ERROR("%p: cannot reset QP: %s", (void *)dev, strerror(err));
> -               assert(err > 0);
> -               return err;
> -       }
> -       err = ibv_resize_cq(tmpl.cq, desc_n);
> -       if (err) {
> -               ERROR("%p: cannot resize CQ: %s", (void *)dev, strerror(err));
> -               assert(err > 0);
> -               return err;
> -       }
> -       mod = (struct ibv_exp_qp_attr){
> -               /* Move the QP to this state. */
> -               .qp_state = IBV_QPS_INIT,
> -               /* Primary port number. */
> -               .port_num = priv->port
> -       };
> -       err = ibv_exp_modify_qp(tmpl.qp, &mod,
> -                               (IBV_EXP_QP_STATE |
> -#ifdef RSS_SUPPORT
> -                                (parent ? IBV_EXP_QP_GROUP_RSS : 0) |
> -#endif /* RSS_SUPPORT */
> -                                IBV_EXP_QP_PORT));
> -       if (err) {
> -               ERROR("%p: QP state to IBV_QPS_INIT failed: %s",
> -                     (void *)dev, strerror(err));
> -               assert(err > 0);
> -               return err;
> -       };
> -       /* Reconfigure flows. Do not care for errors. */
> -       if (!priv->rss) {
> -               rxq_mac_addrs_add(&tmpl);
> -               if (priv->promisc)
> -                       rxq_promiscuous_enable(&tmpl);
> -               if (priv->allmulti)
> -                       rxq_allmulticast_enable(&tmpl);
> -               /* Update original queue in case of failure. */
> -               rxq->allmulti_flow = tmpl.allmulti_flow;
> -               rxq->promisc_flow = tmpl.promisc_flow;
> -               memcpy(rxq->mac_configured, tmpl.mac_configured,
> -                      sizeof(rxq->mac_configured));
> -               memcpy(rxq->mac_flow, tmpl.mac_flow, sizeof(rxq->mac_flow));
> -       }
> -       /* Allocate pool. */
> -       pool = rte_malloc(__func__, (mbuf_n * sizeof(*pool)), 0);
> -       if (pool == NULL) {
> -               ERROR("%p: cannot allocate memory", (void *)dev);
> -               return ENOBUFS;
> -       }
> -       /* Snatch mbufs from original queue. */
> -       k = 0;
> -       if (rxq->sp) {
> -               struct rxq_elt_sp (*elts)[rxq->elts_n] = rxq->elts.sp;
> -
> -               for (i = 0; (i != elemof(*elts)); ++i) {
> -                       struct rxq_elt_sp *elt = &(*elts)[i];
> -                       unsigned int j;
> -
> -                       for (j = 0; (j != elemof(elt->bufs)); ++j) {
> -                               assert(elt->bufs[j] != NULL);
> -                               pool[k++] = elt->bufs[j];
> -                       }
> -               }
> -       } else {
> -               struct rxq_elt (*elts)[rxq->elts_n] = rxq->elts.no_sp;
> -
> -               for (i = 0; (i != elemof(*elts)); ++i) {
> -                       struct rxq_elt *elt = &(*elts)[i];
> -                       struct rte_mbuf *buf = (void *)
> -                               (elt->sge.addr - WR_ID(elt->wr.wr_id).offset);
> -
> -                       assert(WR_ID(elt->wr.wr_id).id == i);
> -                       pool[k++] = buf;
> -               }
> -       }
> -       assert(k == mbuf_n);
> -       tmpl.elts_n = 0;
> -       tmpl.elts.sp = NULL;
> -       assert((void *)&tmpl.elts.sp == (void *)&tmpl.elts.no_sp);
> -       err = ((tmpl.sp) ?
> -              rxq_alloc_elts_sp(&tmpl, desc_n, pool) :
> -              rxq_alloc_elts(&tmpl, desc_n, pool));
> -       if (err) {
> -               ERROR("%p: cannot reallocate WRs, aborting", (void *)dev);
> -               rte_free(pool);
> -               assert(err > 0);
> -               return err;
> -       }
> -       assert(tmpl.elts_n == desc_n);
> -       assert(tmpl.elts.sp != NULL);
> -       rte_free(pool);
> -       /* Clean up original data. */
> -       rxq->elts_n = 0;
> -       rte_free(rxq->elts.sp);
> -       rxq->elts.sp = NULL;
> -       /* Post WRs. */
> -       err = ibv_post_recv(tmpl.qp,
> -                           (tmpl.sp ?
> -                            &(*tmpl.elts.sp)[0].wr :
> -                            &(*tmpl.elts.no_sp)[0].wr),
> -                           &bad_wr);
> -       if (err) {
> -               ERROR("%p: ibv_post_recv() failed for WR %p: %s",
> -                     (void *)dev,
> -                     (void *)bad_wr,
> -                     strerror(err));
> -               goto skip_rtr;
> -       }
> -       mod = (struct ibv_exp_qp_attr){
> -               .qp_state = IBV_QPS_RTR
> -       };
> -       err = ibv_exp_modify_qp(tmpl.qp, &mod, IBV_EXP_QP_STATE);
> -       if (err)
> -               ERROR("%p: QP state to IBV_QPS_RTR failed: %s",
> -                     (void *)dev, strerror(err));
> -skip_rtr:
> -       *rxq = tmpl;
> -       assert(err >= 0);
> -       return err;
> -}
> -
> -/**
> - * Configure a RX queue.
> - *
> - * @param dev
> - *   Pointer to Ethernet device structure.
> - * @param rxq
> - *   Pointer to RX queue structure.
> - * @param desc
> - *   Number of descriptors to configure in queue.
> - * @param socket
> - *   NUMA socket on which memory must be allocated.
> - * @param[in] conf
> - *   Thresholds parameters.
> - * @param mp
> - *   Memory pool for buffer allocations.
> - *
> - * @return
> - *   0 on success, errno value on failure.
> - */
> -static int
> -rxq_setup(struct rte_eth_dev *dev, struct rxq *rxq, uint16_t desc,
> -         unsigned int socket, const struct rte_eth_rxconf *conf,
> -         struct rte_mempool *mp)
> -{
> -       struct priv *priv = dev->data->dev_private;
> -       struct rxq tmpl = {
> -               .priv = priv,
> -               .mp = mp,
> -               .socket = socket
> -       };
> -       struct ibv_exp_qp_attr mod;
> -       struct ibv_recv_wr *bad_wr;
> -       struct rte_mbuf *buf;
> -       int ret = 0;
> -       int parent = (rxq == &priv->rxq_parent);
> -
> -       (void)conf; /* Thresholds configuration (ignored). */
> -       /*
> -        * If this is a parent queue, hardware must support RSS and
> -        * RSS must be enabled.
> -        */
> -       assert((!parent) || ((priv->hw_rss) && (priv->rss)));
> -       if (parent) {
> -               /* Even if unused, ibv_create_cq() requires at least one
> -                * descriptor. */
> -               desc = 1;
> -               goto skip_mr;
> -       }
> -       if ((desc == 0) || (desc % MLX4_PMD_SGE_WR_N)) {
> -               ERROR("%p: invalid number of RX descriptors (must be a"
> -                     " multiple of %d)", (void *)dev, desc);
> -               return EINVAL;
> -       }
> -       /* Get mbuf length. */
> -       buf = rte_pktmbuf_alloc(mp);
> -       if (buf == NULL) {
> -               ERROR("%p: unable to allocate mbuf", (void *)dev);
> -               return ENOMEM;
> -       }
> -       tmpl.mb_len = buf->buf_len;
> -       assert((rte_pktmbuf_headroom(buf) +
> -               rte_pktmbuf_tailroom(buf)) == tmpl.mb_len);
> -       assert(rte_pktmbuf_headroom(buf) == RTE_PKTMBUF_HEADROOM);
> -       rte_pktmbuf_free(buf);
> -       /* Enable scattered packets support for this queue if necessary. */
> -       if ((dev->data->dev_conf.rxmode.jumbo_frame) &&
> -           (dev->data->dev_conf.rxmode.max_rx_pkt_len >
> -            (tmpl.mb_len - RTE_PKTMBUF_HEADROOM))) {
> -               tmpl.sp = 1;
> -               desc /= MLX4_PMD_SGE_WR_N;
> -       }
> -       DEBUG("%p: %s scattered packets support (%u WRs)",
> -             (void *)dev, (tmpl.sp ? "enabling" : "disabling"), desc);
> -       /* Use the entire RX mempool as the memory region. */
> -       tmpl.mr = ibv_reg_mr(priv->pd,
> -                            (void *)mp->elt_va_start,
> -                            (mp->elt_va_end - mp->elt_va_start),
> -                            (IBV_ACCESS_LOCAL_WRITE |
> -                             IBV_ACCESS_REMOTE_WRITE));
> -       if (tmpl.mr == NULL) {
> -               ret = EINVAL;
> -               ERROR("%p: MR creation failure: %s",
> -                     (void *)dev, strerror(ret));
> -               goto error;
> -       }
> -skip_mr:
> -       tmpl.cq = ibv_create_cq(priv->ctx, desc, NULL, NULL, 0);
> -       if (tmpl.cq == NULL) {
> -               ret = ENOMEM;
> -               ERROR("%p: CQ creation failure: %s",
> -                     (void *)dev, strerror(ret));
> -               goto error;
> -       }
> -       DEBUG("priv->device_attr.max_qp_wr is %d",
> -             priv->device_attr.max_qp_wr);
> -       DEBUG("priv->device_attr.max_sge is %d",
> -             priv->device_attr.max_sge);
> -#ifdef RSS_SUPPORT
> -       if (priv->rss)
> -               tmpl.qp = rxq_setup_qp_rss(priv, tmpl.cq, desc, parent);
> -       else
> -#endif /* RSS_SUPPORT */
> -               tmpl.qp = rxq_setup_qp(priv, tmpl.cq, desc);
> -       if (tmpl.qp == NULL) {
> -               ret = (errno ? errno : EINVAL);
> -               ERROR("%p: QP creation failure: %s",
> -                     (void *)dev, strerror(ret));
> -               goto error;
> -       }
> -       mod = (struct ibv_exp_qp_attr){
> -               /* Move the QP to this state. */
> -               .qp_state = IBV_QPS_INIT,
> -               /* Primary port number. */
> -               .port_num = priv->port
> -       };
> -       ret = ibv_exp_modify_qp(tmpl.qp, &mod,
> -                               (IBV_EXP_QP_STATE |
> -#ifdef RSS_SUPPORT
> -                                (parent ? IBV_EXP_QP_GROUP_RSS : 0) |
> -#endif /* RSS_SUPPORT */
> -                                IBV_EXP_QP_PORT));
> -       if (ret) {
> -               ERROR("%p: QP state to IBV_QPS_INIT failed: %s",
> -                     (void *)dev, strerror(ret));
> -               goto error;
> -       }
> -       if ((parent) || (!priv->rss))  {
> -               /* Configure MAC and broadcast addresses. */
> -               ret = rxq_mac_addrs_add(&tmpl);
> -               if (ret) {
> -                       ERROR("%p: QP flow attachment failed: %s",
> -                             (void *)dev, strerror(ret));
> -                       goto error;
> -               }
> -       }
> -       /* Allocate descriptors for RX queues, except for the RSS parent. */
> -       if (parent)
> -               goto skip_alloc;
> -       if (tmpl.sp)
> -               ret = rxq_alloc_elts_sp(&tmpl, desc, NULL);
> -       else
> -               ret = rxq_alloc_elts(&tmpl, desc, NULL);
> -       if (ret) {
> -               ERROR("%p: RXQ allocation failed: %s",
> -                     (void *)dev, strerror(ret));
> -               goto error;
> -       }
> -       ret = ibv_post_recv(tmpl.qp,
> -                           (tmpl.sp ?
> -                            &(*tmpl.elts.sp)[0].wr :
> -                            &(*tmpl.elts.no_sp)[0].wr),
> -                           &bad_wr);
> -       if (ret) {
> -               ERROR("%p: ibv_post_recv() failed for WR %p: %s",
> -                     (void *)dev,
> -                     (void *)bad_wr,
> -                     strerror(ret));
> -               goto error;
> -       }
> -skip_alloc:
> -       mod = (struct ibv_exp_qp_attr){
> -               .qp_state = IBV_QPS_RTR
> -       };
> -       ret = ibv_exp_modify_qp(tmpl.qp, &mod, IBV_EXP_QP_STATE);
> -       if (ret) {
> -               ERROR("%p: QP state to IBV_QPS_RTR failed: %s",
> -                     (void *)dev, strerror(ret));
> -               goto error;
> -       }
> -       /* Save port ID. */
> -       tmpl.port_id = dev->data->port_id;
> -       DEBUG("%p: RTE port ID: %u", (void *)rxq, tmpl.port_id);
> -       /* Clean up rxq in case we're reinitializing it. */
> -       DEBUG("%p: cleaning-up old rxq just in case", (void *)rxq);
> -       rxq_cleanup(rxq);
> -       *rxq = tmpl;
> -       DEBUG("%p: rxq updated with %p", (void *)rxq, (void *)&tmpl);
> -       assert(ret == 0);
> -       return 0;
> -error:
> -       rxq_cleanup(&tmpl);
> -       assert(ret > 0);
> -       return ret;
> -}
> -
> -/**
> - * DPDK callback to configure a RX queue.
> - *
> - * @param dev
> - *   Pointer to Ethernet device structure.
> - * @param idx
> - *   RX queue index.
> - * @param desc
> - *   Number of descriptors to configure in queue.
> - * @param socket
> - *   NUMA socket on which memory must be allocated.
> - * @param[in] conf
> - *   Thresholds parameters.
> - * @param mp
> - *   Memory pool for buffer allocations.
> - *
> - * @return
> - *   0 on success, negative errno value on failure.
> - */
> -static int
> -mlx4_rx_queue_setup(struct rte_eth_dev *dev, uint16_t idx, uint16_t desc,
> -                   unsigned int socket, const struct rte_eth_rxconf *conf,
> -                   struct rte_mempool *mp)
> -{
> -       struct priv *priv = dev->data->dev_private;
> -       struct rxq *rxq = (*priv->rxqs)[idx];
> -       int ret;
> -
> -       priv_lock(priv);
> -       DEBUG("%p: configuring queue %u for %u descriptors",
> -             (void *)dev, idx, desc);
> -       if (idx >= priv->rxqs_n) {
> -               ERROR("%p: queue index out of range (%u >= %u)",
> -                     (void *)dev, idx, priv->rxqs_n);
> -               priv_unlock(priv);
> -               return -EOVERFLOW;
> -       }
> -       if (rxq != NULL) {
> -               DEBUG("%p: reusing already allocated queue index %u (%p)",
> -                     (void *)dev, idx, (void *)rxq);
> -               if (priv->started) {
> -                       priv_unlock(priv);
> -                       return -EEXIST;
> -               }
> -               (*priv->rxqs)[idx] = NULL;
> -               rxq_cleanup(rxq);
> -       } else {
> -               rxq = rte_calloc_socket("RXQ", 1, sizeof(*rxq), 0, socket);
> -               if (rxq == NULL) {
> -                       ERROR("%p: unable to allocate queue index %u",
> -                             (void *)dev, idx);
> -                       priv_unlock(priv);
> -                       return -ENOMEM;
> -               }
> -       }
> -       ret = rxq_setup(dev, rxq, desc, socket, conf, mp);
> -       if (ret)
> -               rte_free(rxq);
> -       else {
> -               rxq->stats.idx = idx;
> -               DEBUG("%p: adding RX queue %p to list",
> -                     (void *)dev, (void *)rxq);
> -               (*priv->rxqs)[idx] = rxq;
> -               /* Update receive callback. */
> -               if (rxq->sp)
> -                       dev->rx_pkt_burst = mlx4_rx_burst_sp;
> -               else
> -                       dev->rx_pkt_burst = mlx4_rx_burst;
> -       }
> -       priv_unlock(priv);
> -       return -ret;
> -}
> -
> -/**
> - * DPDK callback to release a RX queue.
> - *
> - * @param dpdk_rxq
> - *   Generic RX queue pointer.
> - */
> -static void
> -mlx4_rx_queue_release(void *dpdk_rxq)
> -{
> -       struct rxq *rxq = (struct rxq *)dpdk_rxq;
> -       struct priv *priv;
> -       unsigned int i;
> -
> -       if (rxq == NULL)
> -               return;
> -       priv = rxq->priv;
> -       priv_lock(priv);
> -       assert(rxq != &priv->rxq_parent);
> -       for (i = 0; (i != priv->rxqs_n); ++i)
> -               if ((*priv->rxqs)[i] == rxq) {
> -                       DEBUG("%p: removing RX queue %p from list",
> -                             (void *)priv->dev, (void *)rxq);
> -                       (*priv->rxqs)[i] = NULL;
> -                       break;
> -               }
> -       rxq_cleanup(rxq);
> -       rte_free(rxq);
> -       priv_unlock(priv);
> -}
> -
> -/**
> - * DPDK callback to start the device.
> - *
> - * Simulate device start by attaching all configured flows.
> - *
> - * @param dev
> - *   Pointer to Ethernet device structure.
> - *
> - * @return
> - *   0 on success, negative errno value on failure.
> - */
> -static int
> -mlx4_dev_start(struct rte_eth_dev *dev)
> -{
> -       struct priv *priv = dev->data->dev_private;
> -       unsigned int i = 0;
> -       unsigned int r;
> -       struct rxq *rxq;
> -
> -       priv_lock(priv);
> -       if (priv->started) {
> -               priv_unlock(priv);
> -               return 0;
> -       }
> -       DEBUG("%p: attaching configured flows to all RX queues", (void *)dev);
> -       priv->started = 1;
> -       if (priv->rss) {
> -               rxq = &priv->rxq_parent;
> -               r = 1;
> -       } else {
> -               rxq = (*priv->rxqs)[0];
> -               r = priv->rxqs_n;
> -       }
> -       /* Iterate only once when RSS is enabled. */
> -       do {
> -               int ret;
> -
> -               /* Ignore nonexistent RX queues. */
> -               if (rxq == NULL)
> -                       continue;
> -               ret = rxq_mac_addrs_add(rxq);
> -               if (!ret && priv->promisc)
> -                       ret = rxq_promiscuous_enable(rxq);
> -               if (!ret && priv->allmulti)
> -                       ret = rxq_allmulticast_enable(rxq);
> -               if (!ret)
> -                       continue;
> -               WARN("%p: QP flow attachment failed: %s",
> -                    (void *)dev, strerror(ret));
> -               /* Rollback. */
> -               while (i != 0) {
> -                       rxq = (*priv->rxqs)[--i];
> -                       if (rxq != NULL) {
> -                               rxq_allmulticast_disable(rxq);
> -                               rxq_promiscuous_disable(rxq);
> -                               rxq_mac_addrs_del(rxq);
> -                       }
> -               }
> -               priv->started = 0;
> -               return -ret;
> -       } while ((--r) && ((rxq = (*priv->rxqs)[++i]), i));
> -       priv_unlock(priv);
> -       return 0;
> -}
> -
> -/**
> - * DPDK callback to stop the device.
> - *
> - * Simulate device stop by detaching all configured flows.
> - *
> - * @param dev
> - *   Pointer to Ethernet device structure.
> - */
> -static void
> -mlx4_dev_stop(struct rte_eth_dev *dev)
> -{
> -       struct priv *priv = dev->data->dev_private;
> -       unsigned int i = 0;
> -       unsigned int r;
> -       struct rxq *rxq;
> -
> -       priv_lock(priv);
> -       if (!priv->started) {
> -               priv_unlock(priv);
> -               return;
> -       }
> -       DEBUG("%p: detaching flows from all RX queues", (void *)dev);
> -       priv->started = 0;
> -       if (priv->rss) {
> -               rxq = &priv->rxq_parent;
> -               r = 1;
> -       } else {
> -               rxq = (*priv->rxqs)[0];
> -               r = priv->rxqs_n;
> -       }
> -       /* Iterate only once when RSS is enabled. */
> -       do {
> -               /* Ignore nonexistent RX queues. */
> -               if (rxq == NULL)
> -                       continue;
> -               rxq_allmulticast_disable(rxq);
> -               rxq_promiscuous_disable(rxq);
> -               rxq_mac_addrs_del(rxq);
> -       } while ((--r) && ((rxq = (*priv->rxqs)[++i]), i));
> -       priv_unlock(priv);
> -}
> -
> -/**
> - * Dummy DPDK callback for TX.
> - *
> - * This function is used to temporarily replace the real callback during
> - * unsafe control operations on the queue, or in case of error.
> - *
> - * @param dpdk_txq
> - *   Generic pointer to TX queue structure.
> - * @param[in] pkts
> - *   Packets to transmit.
> - * @param pkts_n
> - *   Number of packets in array.
> - *
> - * @return
> - *   Number of packets successfully transmitted (<= pkts_n).
> - */
> -static uint16_t
> -removed_tx_burst(void *dpdk_txq, struct rte_mbuf **pkts, uint16_t pkts_n)
> -{
> -       (void)dpdk_txq;
> -       (void)pkts;
> -       (void)pkts_n;
> -       return 0;
> -}
> -
> -/**
> - * Dummy DPDK callback for RX.
> - *
> - * This function is used to temporarily replace the real callback during
> - * unsafe control operations on the queue, or in case of error.
> - *
> - * @param dpdk_rxq
> - *   Generic pointer to RX queue structure.
> - * @param[out] pkts
> - *   Array to store received packets.
> - * @param pkts_n
> - *   Maximum number of packets in array.
> - *
> - * @return
> - *   Number of packets successfully received (<= pkts_n).
> - */
> -static uint16_t
> -removed_rx_burst(void *dpdk_rxq, struct rte_mbuf **pkts, uint16_t pkts_n)
> -{
> -       (void)dpdk_rxq;
> -       (void)pkts;
> -       (void)pkts_n;
> -       return 0;
> -}
> -
> -/**
> - * DPDK callback to close the device.
> - *
> - * Destroy all queues and objects, free memory.
> - *
> - * @param dev
> - *   Pointer to Ethernet device structure.
> - */
> -static void
> -mlx4_dev_close(struct rte_eth_dev *dev)
> -{
> -       struct priv *priv = dev->data->dev_private;
> -       void *tmp;
> -       unsigned int i;
> -
> -       priv_lock(priv);
> -       DEBUG("%p: closing device \"%s\"",
> -             (void *)dev,
> -             ((priv->ctx != NULL) ? priv->ctx->device->name : ""));
> -       /* Prevent crashes when queues are still in use. This is unfortunately
> -        * still required for DPDK 1.3 because some programs (such as testpmd)
> -        * never release them before closing the device. */
> -       dev->rx_pkt_burst = removed_rx_burst;
> -       dev->tx_pkt_burst = removed_tx_burst;
> -       if (priv->rxqs != NULL) {
> -               /* XXX race condition if mlx4_rx_burst() is still running. */
> -               usleep(1000);
> -               for (i = 0; (i != priv->rxqs_n); ++i) {
> -                       tmp = (*priv->rxqs)[i];
> -                       if (tmp == NULL)
> -                               continue;
> -                       (*priv->rxqs)[i] = NULL;
> -                       rxq_cleanup(tmp);
> -                       rte_free(tmp);
> -               }
> -               priv->rxqs_n = 0;
> -               priv->rxqs = NULL;
> -       }
> -       if (priv->txqs != NULL) {
> -               /* XXX race condition if mlx4_tx_burst() is still running. */
> -               usleep(1000);
> -               for (i = 0; (i != priv->txqs_n); ++i) {
> -                       tmp = (*priv->txqs)[i];
> -                       if (tmp == NULL)
> -                               continue;
> -                       (*priv->txqs)[i] = NULL;
> -                       txq_cleanup(tmp);
> -                       rte_free(tmp);
> -               }
> -               priv->txqs_n = 0;
> -               priv->txqs = NULL;
> -       }
> -       if (priv->rss)
> -               rxq_cleanup(&priv->rxq_parent);
> -       if (priv->pd != NULL) {
> -               assert(priv->ctx != NULL);
> -               claim_zero(ibv_dealloc_pd(priv->pd));
> -               claim_zero(ibv_close_device(priv->ctx));
> -       } else
> -               assert(priv->ctx == NULL);
> -       priv_unlock(priv);
> -       memset(priv, 0, sizeof(*priv));
> -}
> -
> -/**
> - * DPDK callback to get information about the device.
> - *
> - * @param dev
> - *   Pointer to Ethernet device structure.
> - * @param[out] info
> - *   Info structure output buffer.
> - */
> -static void
> -mlx4_dev_infos_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *info)
> -{
> -       struct priv *priv = dev->data->dev_private;
> -       unsigned int max;
> -
> -       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 = elemof(priv->mac);
> -       priv_unlock(priv);
> -}
> -
> -/**
> - * DPDK callback to get device statistics.
> - *
> - * @param dev
> - *   Pointer to Ethernet device structure.
> - * @param[out] stats
> - *   Stats structure output buffer.
> - */
> -static void
> -mlx4_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
> -{
> -       struct priv *priv = dev->data->dev_private;
> -       struct rte_eth_stats tmp = {0};
> -       unsigned int i;
> -       unsigned int idx;
> -
> -       priv_lock(priv);
> -       /* Add software counters. */
> -       for (i = 0; (i != priv->rxqs_n); ++i) {
> -               struct rxq *rxq = (*priv->rxqs)[i];
> -
> -               if (rxq == NULL)
> -                       continue;
> -               idx = rxq->stats.idx;
> -               if (idx < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
> -#ifdef MLX4_PMD_SOFT_COUNTERS
> -                       tmp.q_ipackets[idx] += rxq->stats.ipackets;
> -                       tmp.q_ibytes[idx] += rxq->stats.ibytes;
> -#endif
> -                       tmp.q_errors[idx] += (rxq->stats.idropped +
> -                                             rxq->stats.rx_nombuf);
> -               }
> -#ifdef MLX4_PMD_SOFT_COUNTERS
> -               tmp.ipackets += rxq->stats.ipackets;
> -               tmp.ibytes += rxq->stats.ibytes;
> -#endif
> -               tmp.ierrors += rxq->stats.idropped;
> -               tmp.rx_nombuf += rxq->stats.rx_nombuf;
> -       }
> -       for (i = 0; (i != priv->txqs_n); ++i) {
> -               struct txq *txq = (*priv->txqs)[i];
> -
> -               if (txq == NULL)
> -                       continue;
> -               idx = txq->stats.idx;
> -               if (idx < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
> -#ifdef MLX4_PMD_SOFT_COUNTERS
> -                       tmp.q_opackets[idx] += txq->stats.opackets;
> -                       tmp.q_obytes[idx] += txq->stats.obytes;
> -#endif
> -                       tmp.q_errors[idx] += txq->stats.odropped;
> -               }
> -#ifdef MLX4_PMD_SOFT_COUNTERS
> -               tmp.opackets += txq->stats.opackets;
> -               tmp.obytes += txq->stats.obytes;
> -#endif
> -               tmp.oerrors += txq->stats.odropped;
> -       }
> -#ifndef MLX4_PMD_SOFT_COUNTERS
> -       /* FIXME: retrieve and add hardware counters. */
> -#endif
> -       *stats = tmp;
> -       priv_unlock(priv);
> -}
> -
> -/**
> - * DPDK callback to clear device statistics.
> - *
> - * @param dev
> - *   Pointer to Ethernet device structure.
> - */
> -static void
> -mlx4_stats_reset(struct rte_eth_dev *dev)
> -{
> -       struct priv *priv = dev->data->dev_private;
> -       unsigned int i;
> -       unsigned int idx;
> -
> -       priv_lock(priv);
> -       for (i = 0; (i != priv->rxqs_n); ++i) {
> -               if ((*priv->rxqs)[i] == NULL)
> -                       continue;
> -               idx = (*priv->rxqs)[i]->stats.idx;
> -               (*priv->rxqs)[i]->stats =
> -                       (struct mlx4_rxq_stats){ .idx = idx };
> -       }
> -       for (i = 0; (i != priv->txqs_n); ++i) {
> -               if ((*priv->txqs)[i] == NULL)
> -                       continue;
> -               idx = (*priv->rxqs)[i]->stats.idx;
> -               (*priv->txqs)[i]->stats =
> -                       (struct mlx4_txq_stats){ .idx = idx };
> -       }
> -#ifndef MLX4_PMD_SOFT_COUNTERS
> -       /* FIXME: reset hardware counters. */
> -#endif
> -       priv_unlock(priv);
> -}
> -
> -/**
> - * DPDK callback to remove a MAC address.
> - *
> - * @param dev
> - *   Pointer to Ethernet device structure.
> - * @param index
> - *   MAC address index.
> - */
> -static void
> -mlx4_mac_addr_remove(struct rte_eth_dev *dev, uint32_t index)
> -{
> -       struct priv *priv = dev->data->dev_private;
> -
> -       priv_lock(priv);
> -       DEBUG("%p: removing MAC address from index %" PRIu32,
> -             (void *)dev, index);
> -       if (index >= MLX4_MAX_MAC_ADDRESSES)
> -               goto end;
> -       /* Refuse to remove the broadcast address, this one is special. */
> -       if (!memcmp(priv->mac[index].addr_bytes, "\xff\xff\xff\xff\xff\xff",
> -                   ETHER_ADDR_LEN))
> -               goto end;
> -       priv_mac_addr_del(priv, index);
> -end:
> -       priv_unlock(priv);
> -}
> -
> -/**
> - * DPDK callback to add a MAC address.
> - *
> - * @param dev
> - *   Pointer to Ethernet device structure.
> - * @param mac_addr
> - *   MAC address to register.
> - * @param index
> - *   MAC address index.
> - * @param vmdq
> - *   VMDq pool index to associate address with (ignored).
> - */
> -static void
> -mlx4_mac_addr_add(struct rte_eth_dev *dev, struct ether_addr *mac_addr,
> -                 uint32_t index, uint32_t vmdq)
> -{
> -       struct priv *priv = dev->data->dev_private;
> -
> -       (void)vmdq;
> -       priv_lock(priv);
> -       DEBUG("%p: adding MAC address at index %" PRIu32,
> -             (void *)dev, index);
> -       if (index >= MLX4_MAX_MAC_ADDRESSES)
> -               goto end;
> -       /* Refuse to add the broadcast address, this one is special. */
> -       if (!memcmp(mac_addr->addr_bytes, "\xff\xff\xff\xff\xff\xff",
> -                   ETHER_ADDR_LEN))
> -               goto end;
> -       priv_mac_addr_add(priv, index,
> -                         (const uint8_t (*)[ETHER_ADDR_LEN])
> -                         mac_addr->addr_bytes);
> -end:
> -       priv_unlock(priv);
> -}
> -
> -/**
> - * DPDK callback to enable promiscuous mode.
> - *
> - * @param dev
> - *   Pointer to Ethernet device structure.
> - */
> -static void
> -mlx4_promiscuous_enable(struct rte_eth_dev *dev)
> -{
> -       struct priv *priv = dev->data->dev_private;
> -       unsigned int i;
> -       int ret;
> -
> -       priv_lock(priv);
> -       if (priv->promisc) {
> -               priv_unlock(priv);
> -               return;
> -       }
> -       /* If device isn't started, this is all we need to do. */
> -       if (!priv->started)
> -               goto end;
> -       if (priv->rss) {
> -               ret = rxq_promiscuous_enable(&priv->rxq_parent);
> -               if (ret) {
> -                       priv_unlock(priv);
> -                       return;
> -               }
> -               goto end;
> -       }
> -       for (i = 0; (i != priv->rxqs_n); ++i) {
> -               if ((*priv->rxqs)[i] == NULL)
> -                       continue;
> -               ret = rxq_promiscuous_enable((*priv->rxqs)[i]);
> -               if (!ret)
> -                       continue;
> -               /* Failure, rollback. */
> -               while (i != 0)
> -                       if ((*priv->rxqs)[--i] != NULL)
> -                               rxq_promiscuous_disable((*priv->rxqs)[i]);
> -               priv_unlock(priv);
> -               return;
> -       }
> -end:
> -       priv->promisc = 1;
> -       priv_unlock(priv);
> -}
> -
> -/**
> - * DPDK callback to disable promiscuous mode.
> - *
> - * @param dev
> - *   Pointer to Ethernet device structure.
> - */
> -static void
> -mlx4_promiscuous_disable(struct rte_eth_dev *dev)
> -{
> -       struct priv *priv = dev->data->dev_private;
> -       unsigned int i;
> -
> -       priv_lock(priv);
> -       if (!priv->promisc) {
> -               priv_unlock(priv);
> -               return;
> -       }
> -       if (priv->rss) {
> -               rxq_promiscuous_disable(&priv->rxq_parent);
> -               goto end;
> -       }
> -       for (i = 0; (i != priv->rxqs_n); ++i)
> -               if ((*priv->rxqs)[i] != NULL)
> -                       rxq_promiscuous_disable((*priv->rxqs)[i]);
> -end:
> -       priv->promisc = 0;
> -       priv_unlock(priv);
> -}
> -
> -/**
> - * DPDK callback to enable allmulti mode.
> - *
> - * @param dev
> - *   Pointer to Ethernet device structure.
> - */
> -static void
> -mlx4_allmulticast_enable(struct rte_eth_dev *dev)
> -{
> -       struct priv *priv = dev->data->dev_private;
> -       unsigned int i;
> -       int ret;
> -
> -       priv_lock(priv);
> -       if (priv->allmulti) {
> -               priv_unlock(priv);
> -               return;
> -       }
> -       /* If device isn't started, this is all we need to do. */
> -       if (!priv->started)
> -               goto end;
> -       if (priv->rss) {
> -               ret = rxq_allmulticast_enable(&priv->rxq_parent);
> -               if (ret) {
> -                       priv_unlock(priv);
> -                       return;
> -               }
> -               goto end;
> -       }
> -       for (i = 0; (i != priv->rxqs_n); ++i) {
> -               if ((*priv->rxqs)[i] == NULL)
> -                       continue;
> -               ret = rxq_allmulticast_enable((*priv->rxqs)[i]);
> -               if (!ret)
> -                       continue;
> -               /* Failure, rollback. */
> -               while (i != 0)
> -                       if ((*priv->rxqs)[--i] != NULL)
> -                               rxq_allmulticast_disable((*priv->rxqs)[i]);
> -               priv_unlock(priv);
> -               return;
> -       }
> -end:
> -       priv->allmulti = 1;
> -       priv_unlock(priv);
> -}
> -
> -/**
> - * DPDK callback to disable allmulti mode.
> - *
> - * @param dev
> - *   Pointer to Ethernet device structure.
> - */
> -static void
> -mlx4_allmulticast_disable(struct rte_eth_dev *dev)
> -{
> -       struct priv *priv = dev->data->dev_private;
> -       unsigned int i;
> -
> -       priv_lock(priv);
> -       if (!priv->allmulti) {
> -               priv_unlock(priv);
> -               return;
> -       }
> -       if (priv->rss) {
> -               rxq_allmulticast_disable(&priv->rxq_parent);
> -               goto end;
> -       }
> -       for (i = 0; (i != priv->rxqs_n); ++i)
> -               if ((*priv->rxqs)[i] != NULL)
> -                       rxq_allmulticast_disable((*priv->rxqs)[i]);
> -end:
> -       priv->allmulti = 0;
> -       priv_unlock(priv);
> -}
> -
> -/**
> - * 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).
> - */
> -static int
> -mlx4_link_update_unlocked(struct rte_eth_dev *dev, int wait_to_complete)
> -{
> -       struct priv *priv = dev->data->dev_private;
> -       struct ibv_port_attr port_attr;
> -       static const uint8_t width_mult[] = {
> -               /* Multiplier values taken from devinfo.c in libibverbs. */
> -               0, 1, 4, 0, 8, 0, 0, 0, 12, 0
> -       };
> -
> -       (void)wait_to_complete;
> -       errno = ibv_query_port(priv->ctx, priv->port, &port_attr);
> -       if (errno) {
> -               WARN("port query failed: %s", strerror(errno));
> -               return -1;
> -       }
> -       dev->data->dev_link = (struct rte_eth_link){
> -               .link_speed = (ibv_rate_to_mbps(mult_to_ibv_rate
> -                                               (port_attr.active_speed)) *
> -                              width_mult[(port_attr.active_width %
> -                                          sizeof(width_mult))]),
> -               .link_duplex = ETH_LINK_FULL_DUPLEX,
> -               .link_status = (port_attr.state == IBV_PORT_ACTIVE)
> -       };
> -       if (memcmp(&port_attr, &priv->port_attr, sizeof(port_attr))) {
> -               /* Link status changed. */
> -               priv->port_attr = port_attr;
> -               return 0;
> -       }
> -       /* Link status is still the same. */
> -       return -1;
> -}
> -
> -/**
> - * DPDK callback to retrieve physical link information.
> - *
> - * @param dev
> - *   Pointer to Ethernet device structure.
> - * @param wait_to_complete
> - *   Wait for request completion (ignored).
> - */
> -static int
> -mlx4_link_update(struct rte_eth_dev *dev, int wait_to_complete)
> -{
> -       struct priv *priv = dev->data->dev_private;
> -       int ret;
> -
> -       priv_lock(priv);
> -       ret = mlx4_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.
> - */
> -static int
> -mlx4_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) =
> -               mlx4_rx_burst;
> -
> -       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);
> -       priv->mtu = 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 mlx4_rx_burst() and uses
> -        * removed_rx_burst() instead. */
> -       rte_wmb();
> -       usleep(1000);
> -       /* Reconfigure each RX queue. */
> -       for (i = 0; (i != priv->rxqs_n); ++i) {
> -               struct rxq *rxq = (*priv->rxqs)[i];
> -               unsigned int max_frame_len;
> -               int sp;
> -
> -               if (rxq == NULL)
> -                       continue;
> -               /* Calculate new maximum frame length according to MTU and
> -                * toggle scattered support (sp) if necessary. */
> -               max_frame_len = (priv->mtu + ETHER_HDR_LEN +
> -                                (ETHER_MAX_VLAN_FRAME_LEN - ETHER_MAX_LEN));
> -               sp = (max_frame_len > (rxq->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;
> -               ret = rxq_rehash(dev, rxq);
> -               if (ret) {
> -                       /* Force SP RX if that queue requires it and abort. */
> -                       if (rxq->sp)
> -                               rx_func = mlx4_rx_burst_sp;
> -                       break;
> -               }
> -               /* Reenable non-RSS queue attributes. No need to check
> -                * for errors at this stage. */
> -               if (!priv->rss) {
> -                       rxq_mac_addrs_add(rxq);
> -                       if (priv->promisc)
> -                               rxq_promiscuous_enable(rxq);
> -                       if (priv->allmulti)
> -                               rxq_allmulticast_enable(rxq);
> -               }
> -               /* Scattered burst function takes priority. */
> -               if (rxq->sp)
> -                       rx_func = mlx4_rx_burst_sp;
> -       }
> -       /* 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.
> - */
> -static int
> -mlx4_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;
> -
> -       ifr.ifr_data = ðpause;
> -       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.
> - */
> -static int
> -mlx4_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;
> -
> -       ifr.ifr_data = ðpause;
> -       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;
> -}
> -
> -/**
> - * Configure a VLAN filter.
> - *
> - * @param dev
> - *   Pointer to Ethernet device structure.
> - * @param vlan_id
> - *   VLAN ID to filter.
> - * @param on
> - *   Toggle filter.
> - *
> - * @return
> - *   0 on success, errno value on failure.
> - */
> -static int
> -vlan_filter_set(struct rte_eth_dev *dev, uint16_t vlan_id, int on)
> -{
> -       struct priv *priv = dev->data->dev_private;
> -       unsigned int i;
> -       unsigned int j = -1;
> -
> -       DEBUG("%p: %s VLAN filter ID %" PRIu16,
> -             (void *)dev, (on ? "enable" : "disable"), vlan_id);
> -       for (i = 0; (i != elemof(priv->vlan_filter)); ++i) {
> -               if (!priv->vlan_filter[i].enabled) {
> -                       /* Unused index, remember it. */
> -                       j = i;
> -                       continue;
> -               }
> -               if (priv->vlan_filter[i].id != vlan_id)
> -                       continue;
> -               /* This VLAN ID is already known, use its index. */
> -               j = i;
> -               break;
> -       }
> -       /* Check if there's room for another VLAN filter. */
> -       if (j == (unsigned int)-1)
> -               return ENOMEM;
> -       /*
> -        * VLAN filters apply to all configured MAC addresses, flow
> -        * specifications must be reconfigured accordingly.
> -        */
> -       priv->vlan_filter[j].id = vlan_id;
> -       if ((on) && (!priv->vlan_filter[j].enabled)) {
> -               /*
> -                * Filter is disabled, enable it.
> -                * Rehashing flows in all RX queues is necessary.
> -                */
> -               if (priv->rss)
> -                       rxq_mac_addrs_del(&priv->rxq_parent);
> -               else
> -                       for (i = 0; (i != priv->rxqs_n); ++i)
> -                               if ((*priv->rxqs)[i] != NULL)
> -                                       rxq_mac_addrs_del((*priv->rxqs)[i]);
> -               priv->vlan_filter[j].enabled = 1;
> -               if (priv->started) {
> -                       if (priv->rss)
> -                               rxq_mac_addrs_add(&priv->rxq_parent);
> -                       else
> -                               for (i = 0; (i != priv->rxqs_n); ++i) {
> -                                       if ((*priv->rxqs)[i] == NULL)
> -                                               continue;
> -                                       rxq_mac_addrs_add((*priv->rxqs)[i]);
> -                               }
> -               }
> -       } else if ((!on) && (priv->vlan_filter[j].enabled)) {
> -               /*
> -                * Filter is enabled, disable it.
> -                * Rehashing flows in all RX queues is necessary.
> -                */
> -               if (priv->rss)
> -                       rxq_mac_addrs_del(&priv->rxq_parent);
> -               else
> -                       for (i = 0; (i != priv->rxqs_n); ++i)
> -                               if ((*priv->rxqs)[i] != NULL)
> -                                       rxq_mac_addrs_del((*priv->rxqs)[i]);
> -               priv->vlan_filter[j].enabled = 0;
> -               if (priv->started) {
> -                       if (priv->rss)
> -                               rxq_mac_addrs_add(&priv->rxq_parent);
> -                       else
> -                               for (i = 0; (i != priv->rxqs_n); ++i) {
> -                                       if ((*priv->rxqs)[i] == NULL)
> -                                               continue;
> -                                       rxq_mac_addrs_add((*priv->rxqs)[i]);
> -                               }
> -               }
> -       }
> -       return 0;
> -}
> -
> -/**
> - * DPDK callback to configure a VLAN filter.
> - *
> - * @param dev
> - *   Pointer to Ethernet device structure.
> - * @param vlan_id
> - *   VLAN ID to filter.
> - * @param on
> - *   Toggle filter.
> - *
> - * @return
> - *   0 on success, negative errno value on failure.
> - */
> -static int
> -mlx4_vlan_filter_set(struct rte_eth_dev *dev, uint16_t vlan_id, int on)
> -{
> -       struct priv *priv = dev->data->dev_private;
> -       int ret;
> -
> -       priv_lock(priv);
> -       ret = vlan_filter_set(dev, vlan_id, on);
> -       priv_unlock(priv);
> -       assert(ret >= 0);
> -       return -ret;
> -}
> -
> -static const struct eth_dev_ops mlx4_dev_ops = {
> -       .dev_configure = mlx4_dev_configure,
> -       .dev_start = mlx4_dev_start,
> -       .dev_stop = mlx4_dev_stop,
> -       .dev_close = mlx4_dev_close,
> -       .promiscuous_enable = mlx4_promiscuous_enable,
> -       .promiscuous_disable = mlx4_promiscuous_disable,
> -       .allmulticast_enable = mlx4_allmulticast_enable,
> -       .allmulticast_disable = mlx4_allmulticast_disable,
> -       .link_update = mlx4_link_update,
> -       .stats_get = mlx4_stats_get,
> -       .stats_reset = mlx4_stats_reset,
> -       .queue_stats_mapping_set = NULL,
> -       .dev_infos_get = mlx4_dev_infos_get,
> -       .vlan_filter_set = mlx4_vlan_filter_set,
> -       .vlan_tpid_set = NULL,
> -       .vlan_strip_queue_set = NULL,
> -       .vlan_offload_set = NULL,
> -       .rx_queue_setup = mlx4_rx_queue_setup,
> -       .tx_queue_setup = mlx4_tx_queue_setup,
> -       .rx_queue_release = mlx4_rx_queue_release,
> -       .tx_queue_release = mlx4_tx_queue_release,
> -       .dev_led_on = NULL,
> -       .dev_led_off = NULL,
> -       .flow_ctrl_get = mlx4_dev_get_flow_ctrl,
> -       .flow_ctrl_set = mlx4_dev_set_flow_ctrl,
> -       .priority_flow_ctrl_set = NULL,
> -       .mac_addr_remove = mlx4_mac_addr_remove,
> -       .mac_addr_add = mlx4_mac_addr_add,
> -       .mtu_set = mlx4_dev_set_mtu,
> -       .fdir_add_signature_filter = NULL,
> -       .fdir_update_signature_filter = NULL,
> -       .fdir_remove_signature_filter = NULL,
> -       .fdir_add_perfect_filter = NULL,
> -       .fdir_update_perfect_filter = NULL,
> -       .fdir_remove_perfect_filter = NULL,
> -       .fdir_set_masks = NULL
> -};
> -
> -/**
> - * 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.
> - */
> -static int
> -mlx4_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;
> -}
> -
> -/**
> - * Derive MAC address from port GID.
> - *
> - * @param[out] mac
> - *   MAC address output buffer.
> - * @param port
> - *   Physical port number.
> - * @param[in] gid
> - *   Port GID.
> - */
> -static void
> -mac_from_gid(uint8_t (*mac)[ETHER_ADDR_LEN], uint32_t port, uint8_t *gid)
> -{
> -       memcpy(&(*mac)[0], gid + 8, 3);
> -       memcpy(&(*mac)[3], gid + 13, 3);
> -       if (port == 1)
> -               (*mac)[0] ^= 2;
> -}
> -
> -/* Support up to 32 adapters. */
> -static struct {
> -       struct rte_pci_addr pci_addr; /* associated PCI address */
> -       uint32_t ports; /* physical ports bitfield. */
> -} mlx4_dev[32];
> -
> -/**
> - * Get device index in mlx4_dev[] from PCI bus address.
> - *
> - * @param[in] pci_addr
> - *   PCI bus address to look for.
> - *
> - * @return
> - *   mlx4_dev[] index on success, -1 on failure.
> - */
> -static int
> -mlx4_dev_idx(struct rte_pci_addr *pci_addr)
> -{
> -       unsigned int i;
> -       int ret = -1;
> -
> -       assert(pci_addr != NULL);
> -       for (i = 0; (i != elemof(mlx4_dev)); ++i) {
> -               if ((mlx4_dev[i].pci_addr.domain == pci_addr->domain) &&
> -                   (mlx4_dev[i].pci_addr.bus == pci_addr->bus) &&
> -                   (mlx4_dev[i].pci_addr.devid == pci_addr->devid) &&
> -                   (mlx4_dev[i].pci_addr.function == pci_addr->function))
> -                       return i;
> -               if ((mlx4_dev[i].ports == 0) && (ret == -1))
> -                       ret = i;
> -       }
> -       return ret;
> -}
> -
> -/**
> - * Retrieve integer value from environment variable.
> - *
> - * @param[in] name
> - *   Environment variable name.
> - *
> - * @return
> - *   Integer value, 0 if the variable is not set.
> - */
> -static int
> -mlx4_getenv_int(const char *name)
> -{
> -       const char *val = getenv(name);
> -
> -       if (val == NULL)
> -               return 0;
> -       return atoi(val);
> -}
> -
> -static struct eth_driver mlx4_driver;
> -
> -/**
> - * DPDK callback to register a PCI device.
> - *
> - * This function creates an Ethernet device for each port of a given
> - * PCI device.
> - *
> - * @param[in] pci_drv
> - *   PCI driver structure (mlx4_driver).
> - * @param[in] pci_dev
> - *   PCI device information.
> - *
> - * @return
> - *   0 on success, negative errno value on failure.
> - */
> -static int
> -mlx4_pci_devinit(struct rte_pci_driver *pci_drv, struct rte_pci_device *pci_dev)
> -{
> -       struct ibv_device **list;
> -       struct ibv_device *ibv_dev;
> -       int err = 0;
> -       struct ibv_context *attr_ctx = NULL;
> -       struct ibv_device_attr device_attr;
> -       unsigned int vf;
> -       int idx;
> -       int i;
> -
> -       (void)pci_drv;
> -       assert(pci_drv == &mlx4_driver.pci_drv);
> -       /* Get mlx4_dev[] index. */
> -       idx = mlx4_dev_idx(&pci_dev->addr);
> -       if (idx == -1) {
> -               ERROR("this driver cannot support any more adapters");
> -               return -ENOMEM;
> -       }
> -       DEBUG("using driver device index %d", idx);
> -
> -       /* Save PCI address. */
> -       mlx4_dev[idx].pci_addr = pci_dev->addr;
> -       list = ibv_get_device_list(&i);
> -       if (list == NULL) {
> -               assert(errno);
> -               if (errno == ENOSYS) {
> -                       WARN("cannot list devices, is ib_uverbs loaded?");
> -                       return 0;
> -               }
> -               return -errno;
> -       }
> -       assert(i >= 0);
> -       /*
> -        * For each listed device, check related sysfs entry against
> -        * the provided PCI ID.
> -        */
> -       while (i != 0) {
> -               struct rte_pci_addr pci_addr;
> -
> -               --i;
> -               DEBUG("checking device \"%s\"", list[i]->name);
> -               if (mlx4_ibv_device_to_pci_addr(list[i], &pci_addr))
> -                       continue;
> -               if ((pci_dev->addr.domain != pci_addr.domain) ||
> -                   (pci_dev->addr.bus != pci_addr.bus) ||
> -                   (pci_dev->addr.devid != pci_addr.devid) ||
> -                   (pci_dev->addr.function != pci_addr.function))
> -                       continue;
> -               vf = (pci_dev->id.device_id ==
> -                     PCI_DEVICE_ID_MELLANOX_CONNECTX3VF);
> -               INFO("PCI information matches, using device \"%s\" (VF: %s)",
> -                    list[i]->name, (vf ? "true" : "false"));
> -               attr_ctx = ibv_open_device(list[i]);
> -               err = errno;
> -               break;
> -       }
> -       if (attr_ctx == NULL) {
> -               ibv_free_device_list(list);
> -               switch (err) {
> -               case 0:
> -                       WARN("cannot access device, is mlx4_ib loaded?");
> -                       return 0;
> -               case EINVAL:
> -                       WARN("cannot use device, are drivers up to date?");
> -                       return 0;
> -               }
> -               assert(err > 0);
> -               return -err;
> -       }
> -       ibv_dev = list[i];
> -
> -       DEBUG("device opened");
> -       if (ibv_query_device(attr_ctx, &device_attr))
> -               goto error;
> -       INFO("%u port(s) detected", device_attr.phys_port_cnt);
> -
> -       for (i = 0; i < device_attr.phys_port_cnt; i++) {
> -               uint32_t port = i + 1; /* ports are indexed from one */
> -               uint32_t test = (1 << i);
> -               struct ibv_context *ctx = NULL;
> -               struct ibv_port_attr port_attr;
> -               struct ibv_pd *pd = NULL;
> -               struct priv *priv = NULL;
> -               struct rte_eth_dev *eth_dev;
> -#if defined(INLINE_RECV) || defined(RSS_SUPPORT)
> -               struct ibv_exp_device_attr exp_device_attr;
> -#endif
> -               struct ether_addr mac;
> -               union ibv_gid temp_gid;
> -
> -#ifdef RSS_SUPPORT
> -               exp_device_attr.comp_mask =
> -                       (IBV_EXP_DEVICE_ATTR_EXP_CAP_FLAGS |
> -                        IBV_EXP_DEVICE_ATTR_RSS_TBL_SZ);
> -#endif /* RSS_SUPPORT */
> -
> -               DEBUG("using port %u (%08" PRIx32 ")", port, test);
> -
> -               ctx = ibv_open_device(ibv_dev);
> -               if (ctx == NULL)
> -                       goto port_error;
> -
> -               /* Check port status. */
> -               err = ibv_query_port(ctx, port, &port_attr);
> -               if (err) {
> -                       ERROR("port query failed: %s", strerror(err));
> -                       goto port_error;
> -               }
> -               if (port_attr.state != IBV_PORT_ACTIVE)
> -                       WARN("bad state for port %d: \"%s\" (%d)",
> -                            port, ibv_port_state_str(port_attr.state),
> -                            port_attr.state);
> -
> -               /* Allocate protection domain. */
> -               pd = ibv_alloc_pd(ctx);
> -               if (pd == NULL) {
> -                       ERROR("PD allocation failure");
> -                       err = ENOMEM;
> -                       goto port_error;
> -               }
> -
> -               mlx4_dev[idx].ports |= test;
> -
> -               /* from rte_ethdev.c */
> -               priv = rte_zmalloc("ethdev private structure",
> -                                  sizeof(*priv),
> -                                  RTE_CACHE_LINE_SIZE);
> -               if (priv == NULL) {
> -                       ERROR("priv allocation failure");
> -                       err = ENOMEM;
> -                       goto port_error;
> -               }
> -
> -               priv->ctx = ctx;
> -               priv->device_attr = device_attr;
> -               priv->port_attr = port_attr;
> -               priv->port = port;
> -               priv->pd = pd;
> -               priv->mtu = ETHER_MTU;
> -#ifdef RSS_SUPPORT
> -               if (ibv_exp_query_device(ctx, &exp_device_attr)) {
> -                       INFO("experimental ibv_exp_query_device");
> -                       goto port_error;
> -               }
> -               if ((exp_device_attr.exp_device_cap_flags &
> -                    IBV_EXP_DEVICE_QPG) &&
> -                   (exp_device_attr.exp_device_cap_flags &
> -                    IBV_EXP_DEVICE_UD_RSS) &&
> -                   (exp_device_attr.comp_mask &
> -                    IBV_EXP_DEVICE_ATTR_RSS_TBL_SZ) &&
> -                   (exp_device_attr.max_rss_tbl_sz > 0)) {
> -                       priv->hw_qpg = 1;
> -                       priv->hw_rss = 1;
> -                       priv->max_rss_tbl_sz = exp_device_attr.max_rss_tbl_sz;
> -               } else {
> -                       priv->hw_qpg = 0;
> -                       priv->hw_rss = 0;
> -                       priv->max_rss_tbl_sz = 0;
> -               }
> -               priv->hw_tss = !!(exp_device_attr.exp_device_cap_flags &
> -                                 IBV_EXP_DEVICE_UD_TSS);
> -               DEBUG("device flags: %s%s%s",
> -                     (priv->hw_qpg ? "IBV_DEVICE_QPG " : ""),
> -                     (priv->hw_tss ? "IBV_DEVICE_TSS " : ""),
> -                     (priv->hw_rss ? "IBV_DEVICE_RSS " : ""));
> -               if (priv->hw_rss)
> -                       DEBUG("maximum RSS indirection table size: %u",
> -                             exp_device_attr.max_rss_tbl_sz);
> -#endif /* RSS_SUPPORT */
> -
> -#ifdef INLINE_RECV
> -               priv->inl_recv_size = mlx4_getenv_int("MLX4_INLINE_RECV_SIZE");
> -
> -               if (priv->inl_recv_size) {
> -                       exp_device_attr.comp_mask =
> -                               IBV_EXP_DEVICE_ATTR_INLINE_RECV_SZ;
> -                       if (ibv_exp_query_device(ctx, &exp_device_attr)) {
> -                               INFO("Couldn't query device for inline-receive"
> -                                    " capabilities.");
> -                               priv->inl_recv_size = 0;
> -                       } else {
> -                               if ((unsigned)exp_device_attr.inline_recv_sz <
> -                                   priv->inl_recv_size) {
> -                                       INFO("Max inline-receive (%d) <"
> -                                            " requested inline-receive (%u)",
> -                                            exp_device_attr.inline_recv_sz,
> -                                            priv->inl_recv_size);
> -                                       priv->inl_recv_size =
> -                                               exp_device_attr.inline_recv_sz;
> -                               }
> -                       }
> -                       INFO("Set inline receive size to %u",
> -                            priv->inl_recv_size);
> -               }
> -#endif /* INLINE_RECV */
> -
> -               (void)mlx4_getenv_int;
> -               priv->vf = vf;
> -               if (ibv_query_gid(ctx, port, 0, &temp_gid)) {
> -                       ERROR("ibv_query_gid() failure");
> -                       goto port_error;
> -               }
> -               /* Configure the first MAC address by default. */
> -               mac_from_gid(&mac.addr_bytes, port, temp_gid.raw);
> -               INFO("port %u MAC address is %02x:%02x:%02x:%02x:%02x:%02x",
> -                    priv->port,
> -                    mac.addr_bytes[0], mac.addr_bytes[1],
> -                    mac.addr_bytes[2], mac.addr_bytes[3],
> -                    mac.addr_bytes[4], mac.addr_bytes[5]);
> -               /* Register MAC and broadcast addresses. */
> -               claim_zero(priv_mac_addr_add(priv, 0,
> -                                            (const uint8_t (*)[ETHER_ADDR_LEN])
> -                                            mac.addr_bytes));
> -               claim_zero(priv_mac_addr_add(priv, 1,
> -                                            &(const uint8_t [ETHER_ADDR_LEN])
> -                                            { "\xff\xff\xff\xff\xff\xff" }));
> -#ifndef NDEBUG
> -               {
> -                       char ifname[IF_NAMESIZE];
> -
> -                       if (priv_get_ifname(priv, &ifname) == 0)
> -                               DEBUG("port %u ifname is \"%s\"",
> -                                     priv->port, ifname);
> -                       else
> -                               DEBUG("port %u ifname is unknown", priv->port);
> -               }
> -#endif
> -               /* Get actual MTU if possible. */
> -               priv_get_mtu(priv, &priv->mtu);
> -               DEBUG("port %u MTU is %u", priv->port, priv->mtu);
> -
> -               /* from rte_ethdev.c */
> -               {
> -                       char name[RTE_ETH_NAME_MAX_LEN];
> -
> -                       snprintf(name, sizeof(name), "%s port %u",
> -                                ibv_get_device_name(ibv_dev), port);
> -                       eth_dev = rte_eth_dev_allocate(name, RTE_ETH_DEV_PCI);
> -               }
> -               if (eth_dev == NULL) {
> -                       ERROR("can not allocate rte ethdev");
> -                       err = ENOMEM;
> -                       goto port_error;
> -               }
> -
> -               eth_dev->data->dev_private = priv;
> -               eth_dev->pci_dev = pci_dev;
> -               eth_dev->driver = &mlx4_driver;
> -               eth_dev->data->rx_mbuf_alloc_failed = 0;
> -               eth_dev->data->mtu = ETHER_MTU;
> -
> -               priv->dev = eth_dev;
> -               eth_dev->dev_ops = &mlx4_dev_ops;
> -               eth_dev->data->mac_addrs = priv->mac;
> -
> -               /* Bring Ethernet device up. */
> -               DEBUG("forcing Ethernet interface up");
> -               priv_set_flags(priv, ~IFF_UP, IFF_UP);
> -               continue;
> -
> -port_error:
> -               rte_free(priv);
> -               if (pd)
> -                       claim_zero(ibv_dealloc_pd(pd));
> -               if (ctx)
> -                       claim_zero(ibv_close_device(ctx));
> -               break;
> -       }
> -
> -       /*
> -        * XXX if something went wrong in the loop above, there is a resource
> -        * leak (ctx, pd, priv, dpdk ethdev) but we can do nothing about it as
> -        * long as the dpdk does not provide a way to deallocate a ethdev and a
> -        * way to enumerate the registered ethdevs to free the previous ones.
> -        */
> -
> -       /* no port found, complain */
> -       if (!mlx4_dev[idx].ports) {
> -               err = ENODEV;
> -               goto error;
> -       }
> -
> -error:
> -       if (attr_ctx)
> -               claim_zero(ibv_close_device(attr_ctx));
> -       if (list)
> -               ibv_free_device_list(list);
> -       assert(err >= 0);
> -       return -err;
> -}
> -
> -static const struct rte_pci_id mlx4_pci_id_map[] = {
> -       {
> -               .vendor_id = PCI_VENDOR_ID_MELLANOX,
> -               .device_id = PCI_DEVICE_ID_MELLANOX_CONNECTX3,
> -               .subsystem_vendor_id = PCI_ANY_ID,
> -               .subsystem_device_id = PCI_ANY_ID
> -       },
> -       {
> -               .vendor_id = PCI_VENDOR_ID_MELLANOX,
> -               .device_id = PCI_DEVICE_ID_MELLANOX_CONNECTX3PRO,
> -               .subsystem_vendor_id = PCI_ANY_ID,
> -               .subsystem_device_id = PCI_ANY_ID
> -       },
> -       {
> -               .vendor_id = PCI_VENDOR_ID_MELLANOX,
> -               .device_id = PCI_DEVICE_ID_MELLANOX_CONNECTX3VF,
> -               .subsystem_vendor_id = PCI_ANY_ID,
> -               .subsystem_device_id = PCI_ANY_ID
> -       },
> -       {
> -               .vendor_id = 0
> -       }
> -};
> -
> -static struct eth_driver mlx4_driver = {
> -       .pci_drv = {
> -               .name = MLX4_DRIVER_NAME,
> -               .id_table = mlx4_pci_id_map,
> -               .devinit = mlx4_pci_devinit,
> -       },
> -       .dev_private_size = sizeof(struct priv)
> -};
> -
> -/**
> - * Driver initialization routine.
> - */
> -static int
> -rte_mlx4_pmd_init(const char *name, const char *args)
> -{
> -       (void)name;
> -       (void)args;
> -       rte_eal_pci_register(&mlx4_driver.pci_drv);
> -       return 0;
> -}
> -
> -static struct rte_driver rte_mlx4_driver = {
> -       .type = PMD_PDEV,
> -       .name = MLX4_DRIVER_NAME,
> -       .init = rte_mlx4_pmd_init,
> -};
> -
> -PMD_REGISTER_DRIVER(rte_mlx4_driver)
> diff --git a/lib/librte_pmd_mlx4/mlx4.h b/lib/librte_pmd_mlx4/mlx4.h
> deleted file mode 100644
> index 433aa3b..0000000
> --- a/lib/librte_pmd_mlx4/mlx4.h
> +++ /dev/null
> @@ -1,157 +0,0 @@
> -/*-
> - *   BSD LICENSE
> - *
> - *   Copyright 2012-2015 6WIND S.A.
> - *   Copyright 2012 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.
> - */
> -
> -#ifndef RTE_PMD_MLX4_H_
> -#define RTE_PMD_MLX4_H_
> -
> -#include <stddef.h>
> -#include <stdint.h>
> -#include <limits.h>
> -
> -/*
> - * Maximum number of simultaneous MAC addresses supported.
> - *
> - * According to ConnectX's Programmer Reference Manual:
> - *   The L2 Address Match is implemented by comparing a MAC/VLAN combination
> - *   of 128 MAC addresses and 127 VLAN values, comprising 128x127 possible
> - *   L2 addresses.
> - */
> -#define MLX4_MAX_MAC_ADDRESSES 128
> -
> -/* Maximum number of simultaneous VLAN filters supported. See above. */
> -#define MLX4_MAX_VLAN_IDS 127
> -
> -/* Maximum number of Scatter/Gather Elements per Work Request. */
> -#ifndef MLX4_PMD_SGE_WR_N
> -#define MLX4_PMD_SGE_WR_N 4
> -#endif
> -
> -/* Maximum size for inline data. */
> -#ifndef MLX4_PMD_MAX_INLINE
> -#define MLX4_PMD_MAX_INLINE 0
> -#endif
> -
> -/*
> - * Maximum number of cached Memory Pools (MPs) per TX queue. Each RTE MP
> - * from which buffers are to be transmitted will have to be mapped by this
> - * driver to their own Memory Region (MR). This is a slow operation.
> - *
> - * This value is always 1 for RX queues.
> - */
> -#ifndef MLX4_PMD_TX_MP_CACHE
> -#define MLX4_PMD_TX_MP_CACHE 8
> -#endif
> -
> -/*
> - * If defined, only use software counters. The PMD will never ask the hardware
> - * for these, and many of them won't be available.
> - */
> -#ifndef MLX4_PMD_SOFT_COUNTERS
> -#define MLX4_PMD_SOFT_COUNTERS 1
> -#endif
> -
> -enum {
> -       PCI_VENDOR_ID_MELLANOX = 0x15b3,
> -};
> -
> -enum {
> -       PCI_DEVICE_ID_MELLANOX_CONNECTX3 = 0x1003,
> -       PCI_DEVICE_ID_MELLANOX_CONNECTX3VF = 0x1004,
> -       PCI_DEVICE_ID_MELLANOX_CONNECTX3PRO = 0x1007,
> -};
> -
> -#define MLX4_DRIVER_NAME "librte_pmd_mlx4"
> -
> -/* Bit-field manipulation. */
> -#define BITFIELD_DECLARE(bf, type, size)                               \
> -       type bf[(((size_t)(size) / (sizeof(type) * CHAR_BIT)) +         \
> -                !!((size_t)(size) % (sizeof(type) * CHAR_BIT)))]
> -#define BITFIELD_DEFINE(bf, type, size)                                        \
> -       BITFIELD_DECLARE((bf), type, (size)) = { 0 }
> -#define BITFIELD_SET(bf, b)                                            \
> -       (assert((size_t)(b) < (sizeof(bf) * CHAR_BIT)),                 \
> -        (void)((bf)[((b) / (sizeof((bf)[0]) * CHAR_BIT))] |=           \
> -               ((size_t)1 << ((b) % (sizeof((bf)[0]) * CHAR_BIT)))))
> -#define BITFIELD_RESET(bf, b)                                          \
> -       (assert((size_t)(b) < (sizeof(bf) * CHAR_BIT)),                 \
> -        (void)((bf)[((b) / (sizeof((bf)[0]) * CHAR_BIT))] &=           \
> -               ~((size_t)1 << ((b) % (sizeof((bf)[0]) * CHAR_BIT)))))
> -#define BITFIELD_ISSET(bf, b)                                          \
> -       (assert((size_t)(b) < (sizeof(bf) * CHAR_BIT)),                 \
> -        !!(((bf)[((b) / (sizeof((bf)[0]) * CHAR_BIT))] &               \
> -            ((size_t)1 << ((b) % (sizeof((bf)[0]) * CHAR_BIT))))))
> -
> -/* Number of elements in array. */
> -#define elemof(a) (sizeof(a) / sizeof((a)[0]))
> -
> -/* Cast pointer p to structure member m to its parent structure of type t. */
> -#define containerof(p, t, m) ((t *)((uint8_t *)(p) - offsetof(t, m)))
> -
> -/* Branch prediction helpers. */
> -#ifndef likely
> -#define likely(c) __builtin_expect(!!(c), 1)
> -#endif
> -#ifndef unlikely
> -#define unlikely(c) __builtin_expect(!!(c), 0)
> -#endif
> -
> -/* Debugging */
> -#ifndef NDEBUG
> -#include <stdio.h>
> -#define DEBUG__(m, ...)                                                \
> -       (fprintf(stderr, "%s:%d: %s(): " m "%c",                \
> -                __FILE__, __LINE__, __func__, __VA_ARGS__),    \
> -        fflush(stderr),                                        \
> -        (void)0)
> -/*
> - * Save/restore errno around DEBUG__().
> - * XXX somewhat undefined behavior, but works.
> - */
> -#define DEBUG_(...)                            \
> -       (errno = ((int []){                     \
> -               *(volatile int *)&errno,        \
> -               (DEBUG__(__VA_ARGS__), 0)       \
> -       })[0])
> -#define DEBUG(...) DEBUG_(__VA_ARGS__, '\n')
> -#define claim_zero(...) assert((__VA_ARGS__) == 0)
> -#define claim_nonzero(...) assert((__VA_ARGS__) != 0)
> -#define claim_positive(...) assert((__VA_ARGS__) >= 0)
> -#else /* NDEBUG */
> -/* No-ops. */
> -#define DEBUG(...) (void)0
> -#define claim_zero(...) (__VA_ARGS__)
> -#define claim_nonzero(...) (__VA_ARGS__)
> -#define claim_positive(...) (__VA_ARGS__)
> -#endif /* NDEBUG */
> -
> -#endif /* RTE_PMD_MLX4_H_ */
> diff --git a/lib/librte_pmd_mlx4/rte_pmd_mlx4_version.map b/lib/librte_pmd_mlx4/rte_pmd_mlx4_version.map
> deleted file mode 100644
> index ef35398..0000000
> --- a/lib/librte_pmd_mlx4/rte_pmd_mlx4_version.map
> +++ /dev/null
> @@ -1,4 +0,0 @@
> -DPDK_2.0 {
> -
> -       local: *;
> -};
> --
> 2.1.0
>


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