New upstream version 17.11-rc3

Change-Id: I6a5baa40612fe0c20f30b5fa773a6cbbac63a685
Signed-off-by: Luca Boccassi <luca.boccassi@gmail.com>

1 files changed, 1047 insertions, 0 deletions

diff --git a/drivers/net/mlx4/mlx4_ethdev.c b/drivers/net/mlx4/mlx4_ethdev.c
new file mode 100644
index 00000000..c2ea4db1
--- /dev/null
+++ b/drivers/net/mlx4/mlx4_ethdev.c
@@ -0,0 +1,1047 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright 2017 6WIND S.A.
+ *   Copyright 2017 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.
+ */
+
+/**
+ * @file
+ * Miscellaneous control operations for mlx4 driver.
+ */
+
+#include <assert.h>
+#include <dirent.h>
+#include <errno.h>
+#include <linux/ethtool.h>
+#include <linux/sockios.h>
+#include <net/if.h>
+#include <netinet/ip.h>
+#include <stddef.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/ioctl.h>
+#include <sys/socket.h>
+#include <unistd.h>
+
+/* Verbs headers do not support -pedantic. */
+#ifdef PEDANTIC
+#pragma GCC diagnostic ignored "-Wpedantic"
+#endif
+#include <infiniband/verbs.h>
+#ifdef PEDANTIC
+#pragma GCC diagnostic error "-Wpedantic"
+#endif
+
+#include <rte_bus_pci.h>
+#include <rte_errno.h>
+#include <rte_ethdev.h>
+#include <rte_ether.h>
+#include <rte_flow.h>
+#include <rte_pci.h>
+
+#include "mlx4.h"
+#include "mlx4_flow.h"
+#include "mlx4_rxtx.h"
+#include "mlx4_utils.h"
+
+/**
+ * Get interface name from private structure.
+ *
+ * @param[in] priv
+ *   Pointer to private structure.
+ * @param[out] ifname
+ *   Interface name output buffer.
+ *
+ * @return
+ *   0 on success, negative errno value otherwise and rte_errno is set.
+ */
+int
+mlx4_get_ifname(const struct priv *priv, char (*ifname)[IF_NAMESIZE])
+{
+	DIR *dir;
+	struct dirent *dent;
+	unsigned int dev_type = 0;
+	unsigned int dev_port_prev = ~0u;
+	char match[IF_NAMESIZE] = "";
+
+	{
+		MKSTR(path, "%s/device/net", priv->ctx->device->ibdev_path);
+
+		dir = opendir(path);
+		if (dir == NULL) {
+			rte_errno = errno;
+			return -rte_errno;
+		}
+	}
+	while ((dent = readdir(dir)) != NULL) {
+		char *name = dent->d_name;
+		FILE *file;
+		unsigned int dev_port;
+		int r;
+
+		if ((name[0] == '.') &&
+		    ((name[1] == '\0') ||
+		     ((name[1] == '.') && (name[2] == '\0'))))
+			continue;
+
+		MKSTR(path, "%s/device/net/%s/%s",
+		      priv->ctx->device->ibdev_path, name,
+		      (dev_type ? "dev_id" : "dev_port"));
+
+		file = fopen(path, "rb");
+		if (file == NULL) {
+			if (errno != ENOENT)
+				continue;
+			/*
+			 * Switch to dev_id when dev_port does not exist as
+			 * is the case with Linux kernel versions < 3.15.
+			 */
+try_dev_id:
+			match[0] = '\0';
+			if (dev_type)
+				break;
+			dev_type = 1;
+			dev_port_prev = ~0u;
+			rewinddir(dir);
+			continue;
+		}
+		r = fscanf(file, (dev_type ? "%x" : "%u"), &dev_port);
+		fclose(file);
+		if (r != 1)
+			continue;
+		/*
+		 * Switch to dev_id when dev_port returns the same value for
+		 * all ports. May happen when using a MOFED release older than
+		 * 3.0 with a Linux kernel >= 3.15.
+		 */
+		if (dev_port == dev_port_prev)
+			goto try_dev_id;
+		dev_port_prev = dev_port;
+		if (dev_port == (priv->port - 1u))
+			snprintf(match, sizeof(match), "%s", name);
+	}
+	closedir(dir);
+	if (match[0] == '\0') {
+		rte_errno = ENODEV;
+		return -rte_errno;
+	}
+	strncpy(*ifname, match, sizeof(*ifname));
+	return 0;
+}
+
+/**
+ * Read from sysfs entry.
+ *
+ * @param[in] priv
+ *   Pointer to private structure.
+ * @param[in] entry
+ *   Entry name relative to sysfs path.
+ * @param[out] buf
+ *   Data output buffer.
+ * @param size
+ *   Buffer size.
+ *
+ * @return
+ *   Number of bytes read on success, negative errno value otherwise and
+ *   rte_errno is set.
+ */
+static int
+mlx4_sysfs_read(const struct priv *priv, const char *entry,
+		char *buf, size_t size)
+{
+	char ifname[IF_NAMESIZE];
+	FILE *file;
+	int ret;
+
+	ret = mlx4_get_ifname(priv, &ifname);
+	if (ret)
+		return ret;
+
+	MKSTR(path, "%s/device/net/%s/%s", priv->ctx->device->ibdev_path,
+	      ifname, entry);
+
+	file = fopen(path, "rb");
+	if (file == NULL) {
+		rte_errno = errno;
+		return -rte_errno;
+	}
+	ret = fread(buf, 1, size, file);
+	if ((size_t)ret < size && ferror(file)) {
+		rte_errno = EIO;
+		ret = -rte_errno;
+	} else {
+		ret = size;
+	}
+	fclose(file);
+	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
+ *   Number of bytes written on success, negative errno value otherwise and
+ *   rte_errno is set.
+ */
+static int
+mlx4_sysfs_write(const struct priv *priv, const char *entry,
+		 char *buf, size_t size)
+{
+	char ifname[IF_NAMESIZE];
+	FILE *file;
+	int ret;
+
+	ret = mlx4_get_ifname(priv, &ifname);
+	if (ret)
+		return ret;
+
+	MKSTR(path, "%s/device/net/%s/%s", priv->ctx->device->ibdev_path,
+	      ifname, entry);
+
+	file = fopen(path, "wb");
+	if (file == NULL) {
+		rte_errno = errno;
+		return -rte_errno;
+	}
+	ret = fwrite(buf, 1, size, file);
+	if ((size_t)ret < size || ferror(file)) {
+		rte_errno = EIO;
+		ret = -rte_errno;
+	} else {
+		ret = size;
+	}
+	fclose(file);
+	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, negative errno value otherwise and rte_errno is set.
+ */
+static int
+mlx4_get_sysfs_ulong(struct priv *priv, const char *name, unsigned long *value)
+{
+	int ret;
+	unsigned long value_ret;
+	char value_str[32];
+
+	ret = mlx4_sysfs_read(priv, name, value_str, (sizeof(value_str) - 1));
+	if (ret < 0) {
+		DEBUG("cannot read %s value from sysfs: %s",
+		      name, strerror(rte_errno));
+		return ret;
+	}
+	value_str[ret] = '\0';
+	errno = 0;
+	value_ret = strtoul(value_str, NULL, 0);
+	if (errno) {
+		rte_errno = errno;
+		DEBUG("invalid %s value `%s': %s", name, value_str,
+		      strerror(rte_errno));
+		return -rte_errno;
+	}
+	*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, negative errno value otherwise and rte_errno is set.
+ */
+static int
+mlx4_set_sysfs_ulong(struct priv *priv, const char *name, unsigned long value)
+{
+	int ret;
+	MKSTR(value_str, "%lu", value);
+
+	ret = mlx4_sysfs_write(priv, name, value_str, (sizeof(value_str) - 1));
+	if (ret < 0) {
+		DEBUG("cannot write %s `%s' (%lu) to sysfs: %s",
+		      name, value_str, value, strerror(rte_errno));
+		return ret;
+	}
+	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, negative errno value otherwise and rte_errno is set.
+ */
+static int
+mlx4_ifreq(const struct priv *priv, int req, struct ifreq *ifr)
+{
+	int sock = socket(PF_INET, SOCK_DGRAM, IPPROTO_IP);
+	int ret;
+
+	if (sock == -1) {
+		rte_errno = errno;
+		return -rte_errno;
+	}
+	ret = mlx4_get_ifname(priv, &ifr->ifr_name);
+	if (!ret && ioctl(sock, req, ifr) == -1) {
+		rte_errno = errno;
+		ret = -rte_errno;
+	}
+	close(sock);
+	return ret;
+}
+
+/**
+ * Get MAC address by querying netdevice.
+ *
+ * @param[in] priv
+ *   Pointer to private structure.
+ * @param[out] mac
+ *   MAC address output buffer.
+ *
+ * @return
+ *   0 on success, negative errno value otherwise and rte_errno is set.
+ */
+int
+mlx4_get_mac(struct priv *priv, uint8_t (*mac)[ETHER_ADDR_LEN])
+{
+	struct ifreq request;
+	int ret = mlx4_ifreq(priv, SIOCGIFHWADDR, &request);
+
+	if (ret)
+		return ret;
+	memcpy(mac, request.ifr_hwaddr.sa_data, ETHER_ADDR_LEN);
+	return 0;
+}
+
+/**
+ * Get device MTU.
+ *
+ * @param priv
+ *   Pointer to private structure.
+ * @param[out] mtu
+ *   MTU value output buffer.
+ *
+ * @return
+ *   0 on success, negative errno value otherwise and rte_errno is set.
+ */
+int
+mlx4_mtu_get(struct priv *priv, uint16_t *mtu)
+{
+	unsigned long ulong_mtu = 0;
+	int ret = mlx4_get_sysfs_ulong(priv, "mtu", &ulong_mtu);
+
+	if (ret)
+		return ret;
+	*mtu = ulong_mtu;
+	return 0;
+}
+
+/**
+ * DPDK callback to change the MTU.
+ *
+ * @param priv
+ *   Pointer to Ethernet device structure.
+ * @param mtu
+ *   MTU value to set.
+ *
+ * @return
+ *   0 on success, negative errno value otherwise and rte_errno is set.
+ */
+int
+mlx4_mtu_set(struct rte_eth_dev *dev, uint16_t mtu)
+{
+	struct priv *priv = dev->data->dev_private;
+	uint16_t new_mtu;
+	int ret = mlx4_set_sysfs_ulong(priv, "mtu", mtu);
+
+	if (ret)
+		return ret;
+	ret = mlx4_mtu_get(priv, &new_mtu);
+	if (ret)
+		return ret;
+	if (new_mtu == mtu) {
+		priv->mtu = mtu;
+		return 0;
+	}
+	rte_errno = EINVAL;
+	return -rte_errno;
+}
+
+/**
+ * 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, negative errno value otherwise and rte_errno is set.
+ */
+static int
+mlx4_set_flags(struct priv *priv, unsigned int keep, unsigned int flags)
+{
+	unsigned long tmp = 0;
+	int ret = mlx4_get_sysfs_ulong(priv, "flags", &tmp);
+
+	if (ret)
+		return ret;
+	tmp &= keep;
+	tmp |= (flags & (~keep));
+	return mlx4_set_sysfs_ulong(priv, "flags", tmp);
+}
+
+/**
+ * Change the link state (UP / DOWN).
+ *
+ * @param priv
+ *   Pointer to Ethernet device private data.
+ * @param up
+ *   Nonzero for link up, otherwise link down.
+ *
+ * @return
+ *   0 on success, negative errno value otherwise and rte_errno is set.
+ */
+static int
+mlx4_dev_set_link(struct priv *priv, int up)
+{
+	int err;
+
+	if (up) {
+		err = mlx4_set_flags(priv, ~IFF_UP, IFF_UP);
+		if (err)
+			return err;
+	} else {
+		err = mlx4_set_flags(priv, ~IFF_UP, ~IFF_UP);
+		if (err)
+			return err;
+	}
+	return 0;
+}
+
+/**
+ * DPDK callback to bring the link DOWN.
+ *
+ * @param dev
+ *   Pointer to Ethernet device structure.
+ *
+ * @return
+ *   0 on success, negative errno value otherwise and rte_errno is set.
+ */
+int
+mlx4_dev_set_link_down(struct rte_eth_dev *dev)
+{
+	struct priv *priv = dev->data->dev_private;
+
+	return mlx4_dev_set_link(priv, 0);
+}
+
+/**
+ * DPDK callback to bring the link UP.
+ *
+ * @param dev
+ *   Pointer to Ethernet device structure.
+ *
+ * @return
+ *   0 on success, negative errno value otherwise and rte_errno is set.
+ */
+int
+mlx4_dev_set_link_up(struct rte_eth_dev *dev)
+{
+	struct priv *priv = dev->data->dev_private;
+
+	return mlx4_dev_set_link(priv, 1);
+}
+
+/**
+ * Supported Rx mode toggles.
+ *
+ * Even and odd values respectively stand for off and on.
+ */
+enum rxmode_toggle {
+	RXMODE_TOGGLE_PROMISC_OFF,
+	RXMODE_TOGGLE_PROMISC_ON,
+	RXMODE_TOGGLE_ALLMULTI_OFF,
+	RXMODE_TOGGLE_ALLMULTI_ON,
+};
+
+/**
+ * Helper function to toggle promiscuous and all multicast modes.
+ *
+ * @param dev
+ *   Pointer to Ethernet device structure.
+ * @param toggle
+ *   Toggle to set.
+ */
+static void
+mlx4_rxmode_toggle(struct rte_eth_dev *dev, enum rxmode_toggle toggle)
+{
+	struct priv *priv = dev->data->dev_private;
+	const char *mode;
+	struct rte_flow_error error;
+
+	switch (toggle) {
+	case RXMODE_TOGGLE_PROMISC_OFF:
+	case RXMODE_TOGGLE_PROMISC_ON:
+		mode = "promiscuous";
+		dev->data->promiscuous = toggle & 1;
+		break;
+	case RXMODE_TOGGLE_ALLMULTI_OFF:
+	case RXMODE_TOGGLE_ALLMULTI_ON:
+		mode = "all multicast";
+		dev->data->all_multicast = toggle & 1;
+		break;
+	}
+	if (!mlx4_flow_sync(priv, &error))
+		return;
+	ERROR("cannot toggle %s mode (code %d, \"%s\"),"
+	      " flow error type %d, cause %p, message: %s",
+	      mode, rte_errno, strerror(rte_errno), error.type, error.cause,
+	      error.message ? error.message : "(unspecified)");
+}
+
+/**
+ * DPDK callback to enable promiscuous mode.
+ *
+ * @param dev
+ *   Pointer to Ethernet device structure.
+ */
+void
+mlx4_promiscuous_enable(struct rte_eth_dev *dev)
+{
+	mlx4_rxmode_toggle(dev, RXMODE_TOGGLE_PROMISC_ON);
+}
+
+/**
+ * DPDK callback to disable promiscuous mode.
+ *
+ * @param dev
+ *   Pointer to Ethernet device structure.
+ */
+void
+mlx4_promiscuous_disable(struct rte_eth_dev *dev)
+{
+	mlx4_rxmode_toggle(dev, RXMODE_TOGGLE_PROMISC_OFF);
+}
+
+/**
+ * DPDK callback to enable all multicast mode.
+ *
+ * @param dev
+ *   Pointer to Ethernet device structure.
+ */
+void
+mlx4_allmulticast_enable(struct rte_eth_dev *dev)
+{
+	mlx4_rxmode_toggle(dev, RXMODE_TOGGLE_ALLMULTI_ON);
+}
+
+/**
+ * DPDK callback to disable all multicast mode.
+ *
+ * @param dev
+ *   Pointer to Ethernet device structure.
+ */
+void
+mlx4_allmulticast_disable(struct rte_eth_dev *dev)
+{
+	mlx4_rxmode_toggle(dev, RXMODE_TOGGLE_ALLMULTI_OFF);
+}
+
+/**
+ * DPDK callback to remove a MAC address.
+ *
+ * @param dev
+ *   Pointer to Ethernet device structure.
+ * @param index
+ *   MAC address index.
+ */
+void
+mlx4_mac_addr_remove(struct rte_eth_dev *dev, uint32_t index)
+{
+	struct priv *priv = dev->data->dev_private;
+	struct rte_flow_error error;
+
+	if (index >= RTE_DIM(priv->mac)) {
+		rte_errno = EINVAL;
+		return;
+	}
+	memset(&priv->mac[index], 0, sizeof(priv->mac[index]));
+	if (!mlx4_flow_sync(priv, &error))
+		return;
+	ERROR("failed to synchronize flow rules after removing MAC address"
+	      " at index %d (code %d, \"%s\"),"
+	      " flow error type %d, cause %p, message: %s",
+	      index, rte_errno, strerror(rte_errno), error.type, error.cause,
+	      error.message ? error.message : "(unspecified)");
+}
+
+/**
+ * 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).
+ *
+ * @return
+ *   0 on success, negative errno value otherwise and rte_errno is set.
+ */
+int
+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;
+	struct rte_flow_error error;
+	int ret;
+
+	(void)vmdq;
+	if (index >= RTE_DIM(priv->mac)) {
+		rte_errno = EINVAL;
+		return -rte_errno;
+	}
+	memcpy(&priv->mac[index], mac_addr, sizeof(priv->mac[index]));
+	ret = mlx4_flow_sync(priv, &error);
+	if (!ret)
+		return 0;
+	ERROR("failed to synchronize flow rules after adding MAC address"
+	      " at index %d (code %d, \"%s\"),"
+	      " flow error type %d, cause %p, message: %s",
+	      index, rte_errno, strerror(rte_errno), error.type, error.cause,
+	      error.message ? error.message : "(unspecified)");
+	return ret;
+}
+
+/**
+ * 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 otherwise and rte_errno is set.
+ */
+int
+mlx4_vlan_filter_set(struct rte_eth_dev *dev, uint16_t vlan_id, int on)
+{
+	struct priv *priv = dev->data->dev_private;
+	struct rte_flow_error error;
+	unsigned int vidx = vlan_id / 64;
+	unsigned int vbit = vlan_id % 64;
+	uint64_t *v;
+	int ret;
+
+	if (vidx >= RTE_DIM(dev->data->vlan_filter_conf.ids)) {
+		rte_errno = EINVAL;
+		return -rte_errno;
+	}
+	v = &dev->data->vlan_filter_conf.ids[vidx];
+	*v &= ~(UINT64_C(1) << vbit);
+	*v |= (uint64_t)!!on << vbit;
+	ret = mlx4_flow_sync(priv, &error);
+	if (!ret)
+		return 0;
+	ERROR("failed to synchronize flow rules after %s VLAN filter on ID %u"
+	      " (code %d, \"%s\"), "
+	      " flow error type %d, cause %p, message: %s",
+	      on ? "enabling" : "disabling", vlan_id,
+	      rte_errno, strerror(rte_errno), error.type, error.cause,
+	      error.message ? error.message : "(unspecified)");
+	return ret;
+}
+
+/**
+ * DPDK callback to set the primary MAC address.
+ *
+ * @param dev
+ *   Pointer to Ethernet device structure.
+ * @param mac_addr
+ *   MAC address to register.
+ */
+void
+mlx4_mac_addr_set(struct rte_eth_dev *dev, struct ether_addr *mac_addr)
+{
+	mlx4_mac_addr_add(dev, mac_addr, 0, 0);
+}
+
+/**
+ * DPDK callback to get information about the device.
+ *
+ * @param dev
+ *   Pointer to Ethernet device structure.
+ * @param[out] info
+ *   Info structure output buffer.
+ */
+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;
+	char ifname[IF_NAMESIZE];
+
+	info->pci_dev = RTE_ETH_DEV_TO_PCI(dev);
+	/* FIXME: we should ask the device for these values. */
+	info->min_rx_bufsize = 32;
+	info->max_rx_pktlen = 65536;
+	/*
+	 * Since we need one CQ per QP, the limit is the minimum number
+	 * between the two values.
+	 */
+	max = ((priv->device_attr.max_cq > priv->device_attr.max_qp) ?
+	       priv->device_attr.max_qp : priv->device_attr.max_cq);
+	/* If max >= 65535 then max = 0, max_rx_queues is uint16_t. */
+	if (max >= 65535)
+		max = 65535;
+	info->max_rx_queues = max;
+	info->max_tx_queues = max;
+	info->max_mac_addrs = RTE_DIM(priv->mac);
+	info->rx_offload_capa = 0;
+	info->tx_offload_capa = 0;
+	if (priv->hw_csum) {
+		info->tx_offload_capa |= (DEV_TX_OFFLOAD_IPV4_CKSUM |
+					  DEV_TX_OFFLOAD_UDP_CKSUM |
+					  DEV_TX_OFFLOAD_TCP_CKSUM);
+		info->rx_offload_capa |= (DEV_RX_OFFLOAD_IPV4_CKSUM |
+					  DEV_RX_OFFLOAD_UDP_CKSUM |
+					  DEV_RX_OFFLOAD_TCP_CKSUM);
+	}
+	if (priv->hw_csum_l2tun)
+		info->tx_offload_capa |= DEV_TX_OFFLOAD_OUTER_IPV4_CKSUM;
+	if (mlx4_get_ifname(priv, &ifname) == 0)
+		info->if_index = if_nametoindex(ifname);
+	info->hash_key_size = MLX4_RSS_HASH_KEY_SIZE;
+	info->speed_capa =
+			ETH_LINK_SPEED_1G |
+			ETH_LINK_SPEED_10G |
+			ETH_LINK_SPEED_20G |
+			ETH_LINK_SPEED_40G |
+			ETH_LINK_SPEED_56G;
+}
+
+/**
+ * DPDK callback to get device statistics.
+ *
+ * @param dev
+ *   Pointer to Ethernet device structure.
+ * @param[out] stats
+ *   Stats structure output buffer.
+ */
+int
+mlx4_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
+{
+	struct rte_eth_stats tmp;
+	unsigned int i;
+	unsigned int idx;
+
+	memset(&tmp, 0, sizeof(tmp));
+	/* Add software counters. */
+	for (i = 0; i != dev->data->nb_rx_queues; ++i) {
+		struct rxq *rxq = dev->data->rx_queues[i];
+
+		if (rxq == NULL)
+			continue;
+		idx = rxq->stats.idx;
+		if (idx < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
+			tmp.q_ipackets[idx] += rxq->stats.ipackets;
+			tmp.q_ibytes[idx] += rxq->stats.ibytes;
+			tmp.q_errors[idx] += (rxq->stats.idropped +
+					      rxq->stats.rx_nombuf);
+		}
+		tmp.ipackets += rxq->stats.ipackets;
+		tmp.ibytes += rxq->stats.ibytes;
+		tmp.ierrors += rxq->stats.idropped;
+		tmp.rx_nombuf += rxq->stats.rx_nombuf;
+	}
+	for (i = 0; i != dev->data->nb_tx_queues; ++i) {
+		struct txq *txq = dev->data->tx_queues[i];
+
+		if (txq == NULL)
+			continue;
+		idx = txq->stats.idx;
+		if (idx < RTE_ETHDEV_QUEUE_STAT_CNTRS) {
+			tmp.q_opackets[idx] += txq->stats.opackets;
+			tmp.q_obytes[idx] += txq->stats.obytes;
+			tmp.q_errors[idx] += txq->stats.odropped;
+		}
+		tmp.opackets += txq->stats.opackets;
+		tmp.obytes += txq->stats.obytes;
+		tmp.oerrors += txq->stats.odropped;
+	}
+	*stats = tmp;
+	return 0;
+}
+
+/**
+ * DPDK callback to clear device statistics.
+ *
+ * @param dev
+ *   Pointer to Ethernet device structure.
+ */
+void
+mlx4_stats_reset(struct rte_eth_dev *dev)
+{
+	unsigned int i;
+
+	for (i = 0; i != dev->data->nb_rx_queues; ++i) {
+		struct rxq *rxq = dev->data->rx_queues[i];
+
+		if (rxq)
+			rxq->stats = (struct mlx4_rxq_stats){
+				.idx = rxq->stats.idx,
+			};
+	}
+	for (i = 0; i != dev->data->nb_tx_queues; ++i) {
+		struct txq *txq = dev->data->tx_queues[i];
+
+		if (txq)
+			txq->stats = (struct mlx4_txq_stats){
+				.idx = txq->stats.idx,
+			};
+	}
+}
+
+/**
+ * DPDK callback to retrieve physical link information.
+ *
+ * @param dev
+ *   Pointer to Ethernet device structure.
+ * @param wait_to_complete
+ *   Wait for request completion (ignored).
+ *
+ * @return
+ *   0 on success, negative errno value otherwise and rte_errno is set.
+ */
+int
+mlx4_link_update(struct rte_eth_dev *dev, int wait_to_complete)
+{
+	const struct priv *priv = dev->data->dev_private;
+	struct ethtool_cmd edata = {
+		.cmd = ETHTOOL_GSET,
+	};
+	struct ifreq ifr;
+	struct rte_eth_link dev_link;
+	int link_speed = 0;
+
+	if (priv == NULL) {
+		rte_errno = EINVAL;
+		return -rte_errno;
+	}
+	(void)wait_to_complete;
+	if (mlx4_ifreq(priv, SIOCGIFFLAGS, &ifr)) {
+		WARN("ioctl(SIOCGIFFLAGS) failed: %s", strerror(rte_errno));
+		return -rte_errno;
+	}
+	memset(&dev_link, 0, sizeof(dev_link));
+	dev_link.link_status = ((ifr.ifr_flags & IFF_UP) &&
+				(ifr.ifr_flags & IFF_RUNNING));
+	ifr.ifr_data = (void *)&edata;
+	if (mlx4_ifreq(priv, SIOCETHTOOL, &ifr)) {
+		WARN("ioctl(SIOCETHTOOL, ETHTOOL_GSET) failed: %s",
+		     strerror(rte_errno));
+		return -rte_errno;
+	}
+	link_speed = ethtool_cmd_speed(&edata);
+	if (link_speed == -1)
+		dev_link.link_speed = 0;
+	else
+		dev_link.link_speed = link_speed;
+	dev_link.link_duplex = ((edata.duplex == DUPLEX_HALF) ?
+				ETH_LINK_HALF_DUPLEX : ETH_LINK_FULL_DUPLEX);
+	dev_link.link_autoneg = !(dev->data->dev_conf.link_speeds &
+				  ETH_LINK_SPEED_FIXED);
+	dev->data->dev_link = dev_link;
+	return 0;
+}
+
+/**
+ * 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 otherwise and rte_errno is set.
+ */
+int
+mlx4_flow_ctrl_get(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 = (void *)&ethpause;
+	if (mlx4_ifreq(priv, SIOCETHTOOL, &ifr)) {
+		ret = rte_errno;
+		WARN("ioctl(SIOCETHTOOL, ETHTOOL_GPAUSEPARAM)"
+		     " failed: %s",
+		     strerror(rte_errno));
+		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:
+	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 otherwise and rte_errno is set.
+ */
+int
+mlx4_flow_ctrl_set(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 = (void *)&ethpause;
+	ethpause.autoneg = fc_conf->autoneg;
+	if (((fc_conf->mode & RTE_FC_FULL) == RTE_FC_FULL) ||
+	    (fc_conf->mode & RTE_FC_RX_PAUSE))
+		ethpause.rx_pause = 1;
+	else
+		ethpause.rx_pause = 0;
+	if (((fc_conf->mode & RTE_FC_FULL) == RTE_FC_FULL) ||
+	    (fc_conf->mode & RTE_FC_TX_PAUSE))
+		ethpause.tx_pause = 1;
+	else
+		ethpause.tx_pause = 0;
+	if (mlx4_ifreq(priv, SIOCETHTOOL, &ifr)) {
+		ret = rte_errno;
+		WARN("ioctl(SIOCETHTOOL, ETHTOOL_SPAUSEPARAM)"
+		     " failed: %s",
+		     strerror(rte_errno));
+		goto out;
+	}
+	ret = 0;
+out:
+	assert(ret >= 0);
+	return -ret;
+}
+
+/**
+ * DPDK callback to retrieve the received packet types that are recognized
+ * by the device.
+ *
+ * @param dev
+ *   Pointer to Ethernet device structure.
+ *
+ * @return
+ *   Pointer to an array of recognized packet types if in Rx burst mode,
+ *   NULL otherwise.
+ */
+const uint32_t *
+mlx4_dev_supported_ptypes_get(struct rte_eth_dev *dev)
+{
+	static const uint32_t ptypes[] = {
+		/* refers to rxq_cq_to_pkt_type() */
+		RTE_PTYPE_L2_ETHER,
+		RTE_PTYPE_L3_IPV4_EXT_UNKNOWN,
+		RTE_PTYPE_L3_IPV6_EXT_UNKNOWN,
+		RTE_PTYPE_L4_FRAG,
+		RTE_PTYPE_L4_TCP,
+		RTE_PTYPE_L4_UDP,
+		RTE_PTYPE_INNER_L3_IPV4_EXT_UNKNOWN,
+		RTE_PTYPE_INNER_L3_IPV6_EXT_UNKNOWN,
+		RTE_PTYPE_UNKNOWN
+	};
+
+	if (dev->rx_pkt_burst == mlx4_rx_burst)
+		return ptypes;
+	return NULL;
+}