Imported Upstream version 16.04

Change-Id: I77eadcd8538a9122e4773cbe55b24033dc451757
Signed-off-by: C.J. Collier <cjcollier@linuxfoundation.org>

1 files changed, 1282 insertions, 0 deletions

diff --git a/drivers/net/mlx5/mlx5_ethdev.c b/drivers/net/mlx5/mlx5_ethdev.c
new file mode 100644
index 00000000..36b369e7
--- /dev/null
+++ b/drivers/net/mlx5/mlx5_ethdev.c
@@ -0,0 +1,1282 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright 2015 6WIND S.A.
+ *   Copyright 2015 Mellanox.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in
+ *       the documentation and/or other materials provided with the
+ *       distribution.
+ *     * Neither the name of 6WIND S.A. nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <stddef.h>
+#include <assert.h>
+#include <unistd.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <dirent.h>
+#include <net/if.h>
+#include <sys/ioctl.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <linux/if.h>
+#include <linux/ethtool.h>
+#include <linux/sockios.h>
+#include <fcntl.h>
+
+/* DPDK headers don't like -pedantic. */
+#ifdef PEDANTIC
+#pragma GCC diagnostic ignored "-pedantic"
+#endif
+#include <rte_atomic.h>
+#include <rte_ethdev.h>
+#include <rte_mbuf.h>
+#include <rte_common.h>
+#include <rte_interrupts.h>
+#include <rte_alarm.h>
+#include <rte_malloc.h>
+#ifdef PEDANTIC
+#pragma GCC diagnostic error "-pedantic"
+#endif
+
+#include "mlx5.h"
+#include "mlx5_rxtx.h"
+#include "mlx5_utils.h"
+
+/**
+ * Return private structure associated with an Ethernet device.
+ *
+ * @param dev
+ *   Pointer to Ethernet device structure.
+ *
+ * @return
+ *   Pointer to private structure.
+ */
+struct priv *
+mlx5_get_priv(struct rte_eth_dev *dev)
+{
+	struct mlx5_secondary_data *sd;
+
+	if (!mlx5_is_secondary())
+		return dev->data->dev_private;
+	sd = &mlx5_secondary_data[dev->data->port_id];
+	return sd->data.dev_private;
+}
+
+/**
+ * Check if running as a secondary process.
+ *
+ * @return
+ *   Nonzero if running as a secondary process.
+ */
+inline int
+mlx5_is_secondary(void)
+{
+	return rte_eal_process_type() != RTE_PROC_PRIMARY;
+}
+
+/**
+ * Get interface name from private structure.
+ *
+ * @param[in] priv
+ *   Pointer to private structure.
+ * @param[out] ifname
+ *   Interface name output buffer.
+ *
+ * @return
+ *   0 on success, -1 on failure and errno is set.
+ */
+int
+priv_get_ifname(const struct priv *priv, char (*ifname)[IF_NAMESIZE])
+{
+	DIR *dir;
+	struct dirent *dent;
+	unsigned int dev_type = 0;
+	unsigned int dev_port_prev = ~0u;
+	char match[IF_NAMESIZE] = "";
+
+	{
+		MKSTR(path, "%s/device/net", priv->ctx->device->ibdev_path);
+
+		dir = opendir(path);
+		if (dir == NULL)
+			return -1;
+	}
+	while ((dent = readdir(dir)) != NULL) {
+		char *name = dent->d_name;
+		FILE *file;
+		unsigned int dev_port;
+		int r;
+
+		if ((name[0] == '.') &&
+		    ((name[1] == '\0') ||
+		     ((name[1] == '.') && (name[2] == '\0'))))
+			continue;
+
+		MKSTR(path, "%s/device/net/%s/%s",
+		      priv->ctx->device->ibdev_path, name,
+		      (dev_type ? "dev_id" : "dev_port"));
+
+		file = fopen(path, "rb");
+		if (file == NULL) {
+			if (errno != ENOENT)
+				continue;
+			/*
+			 * Switch to dev_id when dev_port does not exist as
+			 * is the case with Linux kernel versions < 3.15.
+			 */
+try_dev_id:
+			match[0] = '\0';
+			if (dev_type)
+				break;
+			dev_type = 1;
+			dev_port_prev = ~0u;
+			rewinddir(dir);
+			continue;
+		}
+		r = fscanf(file, (dev_type ? "%x" : "%u"), &dev_port);
+		fclose(file);
+		if (r != 1)
+			continue;
+		/*
+		 * Switch to dev_id when dev_port returns the same value for
+		 * all ports. May happen when using a MOFED release older than
+		 * 3.0 with a Linux kernel >= 3.15.
+		 */
+		if (dev_port == dev_port_prev)
+			goto try_dev_id;
+		dev_port_prev = dev_port;
+		if (dev_port == (priv->port - 1u))
+			snprintf(match, sizeof(match), "%s", name);
+	}
+	closedir(dir);
+	if (match[0] == '\0')
+		return -1;
+	strncpy(*ifname, match, sizeof(*ifname));
+	return 0;
+}
+
+/**
+ * Read from sysfs entry.
+ *
+ * @param[in] priv
+ *   Pointer to private structure.
+ * @param[in] entry
+ *   Entry name relative to sysfs path.
+ * @param[out] buf
+ *   Data output buffer.
+ * @param size
+ *   Buffer size.
+ *
+ * @return
+ *   0 on success, -1 on failure and errno is set.
+ */
+static int
+priv_sysfs_read(const struct priv *priv, const char *entry,
+		char *buf, size_t size)
+{
+	char ifname[IF_NAMESIZE];
+	FILE *file;
+	int ret;
+	int err;
+
+	if (priv_get_ifname(priv, &ifname))
+		return -1;
+
+	MKSTR(path, "%s/device/net/%s/%s", priv->ctx->device->ibdev_path,
+	      ifname, entry);
+
+	file = fopen(path, "rb");
+	if (file == NULL)
+		return -1;
+	ret = fread(buf, 1, size, file);
+	err = errno;
+	if (((size_t)ret < size) && (ferror(file)))
+		ret = -1;
+	else
+		ret = size;
+	fclose(file);
+	errno = err;
+	return ret;
+}
+
+/**
+ * Write to sysfs entry.
+ *
+ * @param[in] priv
+ *   Pointer to private structure.
+ * @param[in] entry
+ *   Entry name relative to sysfs path.
+ * @param[in] buf
+ *   Data buffer.
+ * @param size
+ *   Buffer size.
+ *
+ * @return
+ *   0 on success, -1 on failure and errno is set.
+ */
+static int
+priv_sysfs_write(const struct priv *priv, const char *entry,
+		 char *buf, size_t size)
+{
+	char ifname[IF_NAMESIZE];
+	FILE *file;
+	int ret;
+	int err;
+
+	if (priv_get_ifname(priv, &ifname))
+		return -1;
+
+	MKSTR(path, "%s/device/net/%s/%s", priv->ctx->device->ibdev_path,
+	      ifname, entry);
+
+	file = fopen(path, "wb");
+	if (file == NULL)
+		return -1;
+	ret = fwrite(buf, 1, size, file);
+	err = errno;
+	if (((size_t)ret < size) || (ferror(file)))
+		ret = -1;
+	else
+		ret = size;
+	fclose(file);
+	errno = err;
+	return ret;
+}
+
+/**
+ * Get unsigned long sysfs property.
+ *
+ * @param priv
+ *   Pointer to private structure.
+ * @param[in] name
+ *   Entry name relative to sysfs path.
+ * @param[out] value
+ *   Value output buffer.
+ *
+ * @return
+ *   0 on success, -1 on failure and errno is set.
+ */
+static int
+priv_get_sysfs_ulong(struct priv *priv, const char *name, unsigned long *value)
+{
+	int ret;
+	unsigned long value_ret;
+	char value_str[32];
+
+	ret = priv_sysfs_read(priv, name, value_str, (sizeof(value_str) - 1));
+	if (ret == -1) {
+		DEBUG("cannot read %s value from sysfs: %s",
+		      name, strerror(errno));
+		return -1;
+	}
+	value_str[ret] = '\0';
+	errno = 0;
+	value_ret = strtoul(value_str, NULL, 0);
+	if (errno) {
+		DEBUG("invalid %s value `%s': %s", name, value_str,
+		      strerror(errno));
+		return -1;
+	}
+	*value = value_ret;
+	return 0;
+}
+
+/**
+ * Set unsigned long sysfs property.
+ *
+ * @param priv
+ *   Pointer to private structure.
+ * @param[in] name
+ *   Entry name relative to sysfs path.
+ * @param value
+ *   Value to set.
+ *
+ * @return
+ *   0 on success, -1 on failure and errno is set.
+ */
+static int
+priv_set_sysfs_ulong(struct priv *priv, const char *name, unsigned long value)
+{
+	int ret;
+	MKSTR(value_str, "%lu", value);
+
+	ret = priv_sysfs_write(priv, name, value_str, (sizeof(value_str) - 1));
+	if (ret == -1) {
+		DEBUG("cannot write %s `%s' (%lu) to sysfs: %s",
+		      name, value_str, value, strerror(errno));
+		return -1;
+	}
+	return 0;
+}
+
+/**
+ * Perform ifreq ioctl() on associated Ethernet device.
+ *
+ * @param[in] priv
+ *   Pointer to private structure.
+ * @param req
+ *   Request number to pass to ioctl().
+ * @param[out] ifr
+ *   Interface request structure output buffer.
+ *
+ * @return
+ *   0 on success, -1 on failure and errno is set.
+ */
+int
+priv_ifreq(const struct priv *priv, int req, struct ifreq *ifr)
+{
+	int sock = socket(PF_INET, SOCK_DGRAM, IPPROTO_IP);
+	int ret = -1;
+
+	if (sock == -1)
+		return ret;
+	if (priv_get_ifname(priv, &ifr->ifr_name) == 0)
+		ret = ioctl(sock, req, ifr);
+	close(sock);
+	return ret;
+}
+
+/**
+ * Get device MTU.
+ *
+ * @param priv
+ *   Pointer to private structure.
+ * @param[out] mtu
+ *   MTU value output buffer.
+ *
+ * @return
+ *   0 on success, -1 on failure and errno is set.
+ */
+int
+priv_get_mtu(struct priv *priv, uint16_t *mtu)
+{
+	unsigned long ulong_mtu;
+
+	if (priv_get_sysfs_ulong(priv, "mtu", &ulong_mtu) == -1)
+		return -1;
+	*mtu = ulong_mtu;
+	return 0;
+}
+
+/**
+ * Set device MTU.
+ *
+ * @param priv
+ *   Pointer to private structure.
+ * @param mtu
+ *   MTU value to set.
+ *
+ * @return
+ *   0 on success, -1 on failure and errno is set.
+ */
+static int
+priv_set_mtu(struct priv *priv, uint16_t mtu)
+{
+	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.
+ */
+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);
+}
+
+/**
+ * Ethernet device configuration.
+ *
+ * Prepare the driver for a given number of TX and RX queues.
+ *
+ * @param dev
+ *   Pointer to Ethernet device structure.
+ *
+ * @return
+ *   0 on success, errno value on failure.
+ */
+static int
+dev_configure(struct rte_eth_dev *dev)
+{
+	struct priv *priv = dev->data->dev_private;
+	unsigned int rxqs_n = dev->data->nb_rx_queues;
+	unsigned int txqs_n = dev->data->nb_tx_queues;
+	unsigned int i;
+	unsigned int j;
+	unsigned int reta_idx_n;
+
+	priv->rss_hf = dev->data->dev_conf.rx_adv_conf.rss_conf.rss_hf;
+	priv->rxqs = (void *)dev->data->rx_queues;
+	priv->txqs = (void *)dev->data->tx_queues;
+	if (txqs_n != priv->txqs_n) {
+		INFO("%p: TX queues number update: %u -> %u",
+		     (void *)dev, priv->txqs_n, txqs_n);
+		priv->txqs_n = txqs_n;
+	}
+	if (rxqs_n > priv->ind_table_max_size) {
+		ERROR("cannot handle this many RX queues (%u)", rxqs_n);
+		return EINVAL;
+	}
+	if (rxqs_n == priv->rxqs_n)
+		return 0;
+	INFO("%p: RX queues number update: %u -> %u",
+	     (void *)dev, priv->rxqs_n, rxqs_n);
+	priv->rxqs_n = rxqs_n;
+	/* If the requested number of RX queues is not a power of two, use the
+	 * maximum indirection table size for better balancing.
+	 * The result is always rounded to the next power of two. */
+	reta_idx_n = (1 << log2above((rxqs_n & (rxqs_n - 1)) ?
+				     priv->ind_table_max_size :
+				     rxqs_n));
+	if (priv_rss_reta_index_resize(priv, reta_idx_n))
+		return ENOMEM;
+	/* When the number of RX queues is not a power of two, the remaining
+	 * table entries are padded with reused WQs and hashes are not spread
+	 * uniformly. */
+	for (i = 0, j = 0; (i != reta_idx_n); ++i) {
+		(*priv->reta_idx)[i] = j;
+		if (++j == rxqs_n)
+			j = 0;
+	}
+	return 0;
+}
+
+/**
+ * DPDK callback for Ethernet device configuration.
+ *
+ * @param dev
+ *   Pointer to Ethernet device structure.
+ *
+ * @return
+ *   0 on success, negative errno value on failure.
+ */
+int
+mlx5_dev_configure(struct rte_eth_dev *dev)
+{
+	struct priv *priv = dev->data->dev_private;
+	int ret;
+
+	if (mlx5_is_secondary())
+		return -E_RTE_SECONDARY;
+
+	priv_lock(priv);
+	ret = dev_configure(dev);
+	assert(ret >= 0);
+	priv_unlock(priv);
+	return -ret;
+}
+
+/**
+ * DPDK callback to get information about the device.
+ *
+ * @param dev
+ *   Pointer to Ethernet device structure.
+ * @param[out] info
+ *   Info structure output buffer.
+ */
+void
+mlx5_dev_infos_get(struct rte_eth_dev *dev, struct rte_eth_dev_info *info)
+{
+	struct priv *priv = mlx5_get_priv(dev);
+	unsigned int max;
+	char ifname[IF_NAMESIZE];
+
+	priv_lock(priv);
+	/* FIXME: we should ask the device for these values. */
+	info->min_rx_bufsize = 32;
+	info->max_rx_pktlen = 65536;
+	/*
+	 * Since we need one CQ per QP, the limit is the minimum number
+	 * between the two values.
+	 */
+	max = ((priv->device_attr.max_cq > priv->device_attr.max_qp) ?
+	       priv->device_attr.max_qp : priv->device_attr.max_cq);
+	/* If max >= 65535 then max = 0, max_rx_queues is uint16_t. */
+	if (max >= 65535)
+		max = 65535;
+	info->max_rx_queues = max;
+	info->max_tx_queues = max;
+	info->max_mac_addrs = RTE_DIM(priv->mac);
+	info->rx_offload_capa =
+		(priv->hw_csum ?
+		 (DEV_RX_OFFLOAD_IPV4_CKSUM |
+		  DEV_RX_OFFLOAD_UDP_CKSUM |
+		  DEV_RX_OFFLOAD_TCP_CKSUM) :
+		 0);
+	info->tx_offload_capa = DEV_TX_OFFLOAD_VLAN_INSERT;
+	if (priv->hw_csum)
+		info->tx_offload_capa |=
+			(DEV_TX_OFFLOAD_IPV4_CKSUM |
+			 DEV_TX_OFFLOAD_UDP_CKSUM |
+			 DEV_TX_OFFLOAD_TCP_CKSUM);
+	if (priv_get_ifname(priv, &ifname) == 0)
+		info->if_index = if_nametoindex(ifname);
+	/* FIXME: RETA update/query API expects the callee to know the size of
+	 * the indirection table, for this PMD the size varies depending on
+	 * the number of RX queues, it becomes impossible to find the correct
+	 * size if it is not fixed.
+	 * The API should be updated to solve this problem. */
+	info->reta_size = priv->ind_table_max_size;
+	info->speed_capa =
+			ETH_LINK_SPEED_1G |
+			ETH_LINK_SPEED_10G |
+			ETH_LINK_SPEED_20G |
+			ETH_LINK_SPEED_25G |
+			ETH_LINK_SPEED_40G |
+			ETH_LINK_SPEED_50G |
+			ETH_LINK_SPEED_56G |
+			ETH_LINK_SPEED_100G;
+	priv_unlock(priv);
+}
+
+const uint32_t *
+mlx5_dev_supported_ptypes_get(struct rte_eth_dev *dev)
+{
+	static const uint32_t ptypes[] = {
+		/* refers to rxq_cq_to_pkt_type() */
+		RTE_PTYPE_L3_IPV4,
+		RTE_PTYPE_L3_IPV6,
+		RTE_PTYPE_INNER_L3_IPV4,
+		RTE_PTYPE_INNER_L3_IPV6,
+		RTE_PTYPE_UNKNOWN
+
+	};
+
+	if (dev->rx_pkt_burst == mlx5_rx_burst ||
+	    dev->rx_pkt_burst == mlx5_rx_burst_sp)
+		return ptypes;
+	return NULL;
+}
+
+/**
+ * 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
+mlx5_link_update_unlocked(struct rte_eth_dev *dev, int wait_to_complete)
+{
+	struct priv *priv = mlx5_get_priv(dev);
+	struct ethtool_cmd edata = {
+		.cmd = ETHTOOL_GSET
+	};
+	struct ifreq ifr;
+	struct rte_eth_link dev_link;
+	int link_speed = 0;
+
+	(void)wait_to_complete;
+	if (priv_ifreq(priv, SIOCGIFFLAGS, &ifr)) {
+		WARN("ioctl(SIOCGIFFLAGS) failed: %s", strerror(errno));
+		return -1;
+	}
+	memset(&dev_link, 0, sizeof(dev_link));
+	dev_link.link_status = ((ifr.ifr_flags & IFF_UP) &&
+				(ifr.ifr_flags & IFF_RUNNING));
+	ifr.ifr_data = &edata;
+	if (priv_ifreq(priv, SIOCETHTOOL, &ifr)) {
+		WARN("ioctl(SIOCETHTOOL, ETHTOOL_GSET) failed: %s",
+		     strerror(errno));
+		return -1;
+	}
+	link_speed = ethtool_cmd_speed(&edata);
+	if (link_speed == -1)
+		dev_link.link_speed = 0;
+	else
+		dev_link.link_speed = link_speed;
+	dev_link.link_duplex = ((edata.duplex == DUPLEX_HALF) ?
+				ETH_LINK_HALF_DUPLEX : ETH_LINK_FULL_DUPLEX);
+	dev_link.link_autoneg = !(dev->data->dev_conf.link_speeds &
+			ETH_LINK_SPEED_FIXED);
+	if (memcmp(&dev_link, &dev->data->dev_link, sizeof(dev_link))) {
+		/* Link status changed. */
+		dev->data->dev_link = dev_link;
+		return 0;
+	}
+	/* Link status is still the same. */
+	return -1;
+}
+
+/**
+ * DPDK callback to retrieve physical link information.
+ *
+ * @param dev
+ *   Pointer to Ethernet device structure.
+ * @param wait_to_complete
+ *   Wait for request completion (ignored).
+ */
+int
+mlx5_link_update(struct rte_eth_dev *dev, int wait_to_complete)
+{
+	struct priv *priv = mlx5_get_priv(dev);
+	int ret;
+
+	priv_lock(priv);
+	ret = mlx5_link_update_unlocked(dev, wait_to_complete);
+	priv_unlock(priv);
+	return ret;
+}
+
+/**
+ * DPDK callback to change the MTU.
+ *
+ * Setting the MTU affects hardware MRU (packets larger than the MTU cannot be
+ * received). Use this as a hint to enable/disable scattered packets support
+ * and improve performance when not needed.
+ * Since failure is not an option, reconfiguring queues on the fly is not
+ * recommended.
+ *
+ * @param dev
+ *   Pointer to Ethernet device structure.
+ * @param in_mtu
+ *   New MTU.
+ *
+ * @return
+ *   0 on success, negative errno value on failure.
+ */
+int
+mlx5_dev_set_mtu(struct rte_eth_dev *dev, uint16_t mtu)
+{
+	struct priv *priv = dev->data->dev_private;
+	int ret = 0;
+	unsigned int i;
+	uint16_t (*rx_func)(void *, struct rte_mbuf **, uint16_t) =
+		mlx5_rx_burst;
+
+	if (mlx5_is_secondary())
+		return -E_RTE_SECONDARY;
+
+	priv_lock(priv);
+	/* Set kernel interface MTU first. */
+	if (priv_set_mtu(priv, mtu)) {
+		ret = errno;
+		WARN("cannot set port %u MTU to %u: %s", priv->port, mtu,
+		     strerror(ret));
+		goto out;
+	} else
+		DEBUG("adapter port %u MTU set to %u", priv->port, mtu);
+	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 mlx5_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 = mlx5_rx_burst_sp;
+			break;
+		}
+		/* Scattered burst function takes priority. */
+		if (rxq->sp)
+			rx_func = mlx5_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.
+ */
+int
+mlx5_dev_get_flow_ctrl(struct rte_eth_dev *dev, struct rte_eth_fc_conf *fc_conf)
+{
+	struct priv *priv = dev->data->dev_private;
+	struct ifreq ifr;
+	struct ethtool_pauseparam ethpause = {
+		.cmd = ETHTOOL_GPAUSEPARAM
+	};
+	int ret;
+
+	if (mlx5_is_secondary())
+		return -E_RTE_SECONDARY;
+
+	ifr.ifr_data = &ethpause;
+	priv_lock(priv);
+	if (priv_ifreq(priv, SIOCETHTOOL, &ifr)) {
+		ret = errno;
+		WARN("ioctl(SIOCETHTOOL, ETHTOOL_GPAUSEPARAM)"
+		     " failed: %s",
+		     strerror(ret));
+		goto out;
+	}
+
+	fc_conf->autoneg = ethpause.autoneg;
+	if (ethpause.rx_pause && ethpause.tx_pause)
+		fc_conf->mode = RTE_FC_FULL;
+	else if (ethpause.rx_pause)
+		fc_conf->mode = RTE_FC_RX_PAUSE;
+	else if (ethpause.tx_pause)
+		fc_conf->mode = RTE_FC_TX_PAUSE;
+	else
+		fc_conf->mode = RTE_FC_NONE;
+	ret = 0;
+
+out:
+	priv_unlock(priv);
+	assert(ret >= 0);
+	return -ret;
+}
+
+/**
+ * DPDK callback to modify flow control parameters.
+ *
+ * @param dev
+ *   Pointer to Ethernet device structure.
+ * @param[in] fc_conf
+ *   Flow control parameters.
+ *
+ * @return
+ *   0 on success, negative errno value on failure.
+ */
+int
+mlx5_dev_set_flow_ctrl(struct rte_eth_dev *dev, struct rte_eth_fc_conf *fc_conf)
+{
+	struct priv *priv = dev->data->dev_private;
+	struct ifreq ifr;
+	struct ethtool_pauseparam ethpause = {
+		.cmd = ETHTOOL_SPAUSEPARAM
+	};
+	int ret;
+
+	if (mlx5_is_secondary())
+		return -E_RTE_SECONDARY;
+
+	ifr.ifr_data = &ethpause;
+	ethpause.autoneg = fc_conf->autoneg;
+	if (((fc_conf->mode & RTE_FC_FULL) == RTE_FC_FULL) ||
+	    (fc_conf->mode & RTE_FC_RX_PAUSE))
+		ethpause.rx_pause = 1;
+	else
+		ethpause.rx_pause = 0;
+
+	if (((fc_conf->mode & RTE_FC_FULL) == RTE_FC_FULL) ||
+	    (fc_conf->mode & RTE_FC_TX_PAUSE))
+		ethpause.tx_pause = 1;
+	else
+		ethpause.tx_pause = 0;
+
+	priv_lock(priv);
+	if (priv_ifreq(priv, SIOCETHTOOL, &ifr)) {
+		ret = errno;
+		WARN("ioctl(SIOCETHTOOL, ETHTOOL_SPAUSEPARAM)"
+		     " failed: %s",
+		     strerror(ret));
+		goto out;
+	}
+	ret = 0;
+
+out:
+	priv_unlock(priv);
+	assert(ret >= 0);
+	return -ret;
+}
+
+/**
+ * Get PCI information from struct ibv_device.
+ *
+ * @param device
+ *   Pointer to Ethernet device structure.
+ * @param[out] pci_addr
+ *   PCI bus address output buffer.
+ *
+ * @return
+ *   0 on success, -1 on failure and errno is set.
+ */
+int
+mlx5_ibv_device_to_pci_addr(const struct ibv_device *device,
+			    struct rte_pci_addr *pci_addr)
+{
+	FILE *file;
+	char line[32];
+	MKSTR(path, "%s/device/uevent", device->ibdev_path);
+
+	file = fopen(path, "rb");
+	if (file == NULL)
+		return -1;
+	while (fgets(line, sizeof(line), file) == line) {
+		size_t len = strlen(line);
+		int ret;
+
+		/* Truncate long lines. */
+		if (len == (sizeof(line) - 1))
+			while (line[(len - 1)] != '\n') {
+				ret = fgetc(file);
+				if (ret == EOF)
+					break;
+				line[(len - 1)] = ret;
+			}
+		/* Extract information. */
+		if (sscanf(line,
+			   "PCI_SLOT_NAME="
+			   "%" SCNx16 ":%" SCNx8 ":%" SCNx8 ".%" SCNx8 "\n",
+			   &pci_addr->domain,
+			   &pci_addr->bus,
+			   &pci_addr->devid,
+			   &pci_addr->function) == 4) {
+			ret = 0;
+			break;
+		}
+	}
+	fclose(file);
+	return 0;
+}
+
+/**
+ * Link status handler.
+ *
+ * @param priv
+ *   Pointer to private structure.
+ * @param dev
+ *   Pointer to the rte_eth_dev structure.
+ *
+ * @return
+ *   Nonzero if the callback process can be called immediately.
+ */
+static int
+priv_dev_link_status_handler(struct priv *priv, struct rte_eth_dev *dev)
+{
+	struct ibv_async_event event;
+	int port_change = 0;
+	int ret = 0;
+
+	/* Read all message and acknowledge them. */
+	for (;;) {
+		if (ibv_get_async_event(priv->ctx, &event))
+			break;
+
+		if (event.event_type == IBV_EVENT_PORT_ACTIVE ||
+		    event.event_type == IBV_EVENT_PORT_ERR)
+			port_change = 1;
+		else
+			DEBUG("event type %d on port %d not handled",
+			      event.event_type, event.element.port_num);
+		ibv_ack_async_event(&event);
+	}
+
+	if (port_change ^ priv->pending_alarm) {
+		struct rte_eth_link *link = &dev->data->dev_link;
+
+		priv->pending_alarm = 0;
+		mlx5_link_update_unlocked(dev, 0);
+		if (((link->link_speed == 0) && link->link_status) ||
+		    ((link->link_speed != 0) && !link->link_status)) {
+			/* Inconsistent status, check again later. */
+			priv->pending_alarm = 1;
+			rte_eal_alarm_set(MLX5_ALARM_TIMEOUT_US,
+					  mlx5_dev_link_status_handler,
+					  dev);
+		} else
+			ret = 1;
+	}
+	return ret;
+}
+
+/**
+ * Handle delayed link status event.
+ *
+ * @param arg
+ *   Registered argument.
+ */
+void
+mlx5_dev_link_status_handler(void *arg)
+{
+	struct rte_eth_dev *dev = arg;
+	struct priv *priv = dev->data->dev_private;
+	int ret;
+
+	priv_lock(priv);
+	assert(priv->pending_alarm == 1);
+	ret = priv_dev_link_status_handler(priv, dev);
+	priv_unlock(priv);
+	if (ret)
+		_rte_eth_dev_callback_process(dev, RTE_ETH_EVENT_INTR_LSC);
+}
+
+/**
+ * Handle interrupts from the NIC.
+ *
+ * @param[in] intr_handle
+ *   Interrupt handler.
+ * @param cb_arg
+ *   Callback argument.
+ */
+void
+mlx5_dev_interrupt_handler(struct rte_intr_handle *intr_handle, void *cb_arg)
+{
+	struct rte_eth_dev *dev = cb_arg;
+	struct priv *priv = dev->data->dev_private;
+	int ret;
+
+	(void)intr_handle;
+	priv_lock(priv);
+	ret = priv_dev_link_status_handler(priv, dev);
+	priv_unlock(priv);
+	if (ret)
+		_rte_eth_dev_callback_process(dev, RTE_ETH_EVENT_INTR_LSC);
+}
+
+/**
+ * Uninstall interrupt handler.
+ *
+ * @param priv
+ *   Pointer to private structure.
+ * @param dev
+ *   Pointer to the rte_eth_dev structure.
+ */
+void
+priv_dev_interrupt_handler_uninstall(struct priv *priv, struct rte_eth_dev *dev)
+{
+	if (!dev->data->dev_conf.intr_conf.lsc)
+		return;
+	rte_intr_callback_unregister(&priv->intr_handle,
+				     mlx5_dev_interrupt_handler,
+				     dev);
+	if (priv->pending_alarm)
+		rte_eal_alarm_cancel(mlx5_dev_link_status_handler, dev);
+	priv->pending_alarm = 0;
+	priv->intr_handle.fd = 0;
+	priv->intr_handle.type = 0;
+}
+
+/**
+ * Install interrupt handler.
+ *
+ * @param priv
+ *   Pointer to private structure.
+ * @param dev
+ *   Pointer to the rte_eth_dev structure.
+ */
+void
+priv_dev_interrupt_handler_install(struct priv *priv, struct rte_eth_dev *dev)
+{
+	int rc, flags;
+
+	if (!dev->data->dev_conf.intr_conf.lsc)
+		return;
+	assert(priv->ctx->async_fd > 0);
+	flags = fcntl(priv->ctx->async_fd, F_GETFL);
+	rc = fcntl(priv->ctx->async_fd, F_SETFL, flags | O_NONBLOCK);
+	if (rc < 0) {
+		INFO("failed to change file descriptor async event queue");
+		dev->data->dev_conf.intr_conf.lsc = 0;
+	} else {
+		priv->intr_handle.fd = priv->ctx->async_fd;
+		priv->intr_handle.type = RTE_INTR_HANDLE_EXT;
+		rte_intr_callback_register(&priv->intr_handle,
+					   mlx5_dev_interrupt_handler,
+					   dev);
+	}
+}
+
+/**
+ * Change the link state (UP / DOWN).
+ *
+ * @param dev
+ *   Pointer to Ethernet device structure.
+ * @param up
+ *   Nonzero for link up, otherwise link down.
+ *
+ * @return
+ *   0 on success, errno value on failure.
+ */
+static int
+priv_set_link(struct priv *priv, int up)
+{
+	struct rte_eth_dev *dev = priv->dev;
+	int err;
+	unsigned int i;
+
+	if (up) {
+		err = priv_set_flags(priv, ~IFF_UP, IFF_UP);
+		if (err)
+			return err;
+		for (i = 0; i < priv->rxqs_n; i++)
+			if ((*priv->rxqs)[i]->sp)
+				break;
+		/* Check if an sp queue exists.
+		 * Note: Some old frames might be received.
+		 */
+		if (i == priv->rxqs_n)
+			dev->rx_pkt_burst = mlx5_rx_burst;
+		else
+			dev->rx_pkt_burst = mlx5_rx_burst_sp;
+		dev->tx_pkt_burst = mlx5_tx_burst;
+	} else {
+		err = priv_set_flags(priv, ~IFF_UP, ~IFF_UP);
+		if (err)
+			return err;
+		dev->rx_pkt_burst = removed_rx_burst;
+		dev->tx_pkt_burst = removed_tx_burst;
+	}
+	return 0;
+}
+
+/**
+ * DPDK callback to bring the link DOWN.
+ *
+ * @param dev
+ *   Pointer to Ethernet device structure.
+ *
+ * @return
+ *   0 on success, errno value on failure.
+ */
+int
+mlx5_set_link_down(struct rte_eth_dev *dev)
+{
+	struct priv *priv = dev->data->dev_private;
+	int err;
+
+	priv_lock(priv);
+	err = priv_set_link(priv, 0);
+	priv_unlock(priv);
+	return err;
+}
+
+/**
+ * DPDK callback to bring the link UP.
+ *
+ * @param dev
+ *   Pointer to Ethernet device structure.
+ *
+ * @return
+ *   0 on success, errno value on failure.
+ */
+int
+mlx5_set_link_up(struct rte_eth_dev *dev)
+{
+	struct priv *priv = dev->data->dev_private;
+	int err;
+
+	priv_lock(priv);
+	err = priv_set_link(priv, 1);
+	priv_unlock(priv);
+	return err;
+}
+
+/**
+ * Configure secondary process queues from a private data pointer (primary
+ * or secondary) and update burst callbacks. Can take place only once.
+ *
+ * All queues must have been previously created by the primary process to
+ * avoid undefined behavior.
+ *
+ * @param priv
+ *   Private data pointer from either primary or secondary process.
+ *
+ * @return
+ *   Private data pointer from secondary process, NULL in case of error.
+ */
+struct priv *
+mlx5_secondary_data_setup(struct priv *priv)
+{
+	unsigned int port_id = 0;
+	struct mlx5_secondary_data *sd;
+	void **tx_queues;
+	void **rx_queues;
+	unsigned int nb_tx_queues;
+	unsigned int nb_rx_queues;
+	unsigned int i;
+
+	/* priv must be valid at this point. */
+	assert(priv != NULL);
+	/* priv->dev must also be valid but may point to local memory from
+	 * another process, possibly with the same address and must not
+	 * be dereferenced yet. */
+	assert(priv->dev != NULL);
+	/* Determine port ID by finding out where priv comes from. */
+	while (1) {
+		sd = &mlx5_secondary_data[port_id];
+		rte_spinlock_lock(&sd->lock);
+		/* Primary process? */
+		if (sd->primary_priv == priv)
+			break;
+		/* Secondary process? */
+		if (sd->data.dev_private == priv)
+			break;
+		rte_spinlock_unlock(&sd->lock);
+		if (++port_id == RTE_DIM(mlx5_secondary_data))
+			port_id = 0;
+	}
+	/* Switch to secondary private structure. If private data has already
+	 * been updated by another thread, there is nothing else to do. */
+	priv = sd->data.dev_private;
+	if (priv->dev->data == &sd->data)
+		goto end;
+	/* Sanity checks. Secondary private structure is supposed to point
+	 * to local eth_dev, itself still pointing to the shared device data
+	 * structure allocated by the primary process. */
+	assert(sd->shared_dev_data != &sd->data);
+	assert(sd->data.nb_tx_queues == 0);
+	assert(sd->data.tx_queues == NULL);
+	assert(sd->data.nb_rx_queues == 0);
+	assert(sd->data.rx_queues == NULL);
+	assert(priv != sd->primary_priv);
+	assert(priv->dev->data == sd->shared_dev_data);
+	assert(priv->txqs_n == 0);
+	assert(priv->txqs == NULL);
+	assert(priv->rxqs_n == 0);
+	assert(priv->rxqs == NULL);
+	nb_tx_queues = sd->shared_dev_data->nb_tx_queues;
+	nb_rx_queues = sd->shared_dev_data->nb_rx_queues;
+	/* Allocate local storage for queues. */
+	tx_queues = rte_zmalloc("secondary ethdev->tx_queues",
+				sizeof(sd->data.tx_queues[0]) * nb_tx_queues,
+				RTE_CACHE_LINE_SIZE);
+	rx_queues = rte_zmalloc("secondary ethdev->rx_queues",
+				sizeof(sd->data.rx_queues[0]) * nb_rx_queues,
+				RTE_CACHE_LINE_SIZE);
+	if (tx_queues == NULL || rx_queues == NULL)
+		goto error;
+	/* Lock to prevent control operations during setup. */
+	priv_lock(priv);
+	/* TX queues. */
+	for (i = 0; i != nb_tx_queues; ++i) {
+		struct txq *primary_txq = (*sd->primary_priv->txqs)[i];
+		struct txq *txq;
+
+		if (primary_txq == NULL)
+			continue;
+		txq = rte_calloc_socket("TXQ", 1, sizeof(*txq), 0,
+					primary_txq->socket);
+		if (txq != NULL) {
+			if (txq_setup(priv->dev,
+				      txq,
+				      primary_txq->elts_n * MLX5_PMD_SGE_WR_N,
+				      primary_txq->socket,
+				      NULL) == 0) {
+				txq->stats.idx = primary_txq->stats.idx;
+				tx_queues[i] = txq;
+				continue;
+			}
+			rte_free(txq);
+		}
+		while (i) {
+			txq = tx_queues[--i];
+			txq_cleanup(txq);
+			rte_free(txq);
+		}
+		goto error;
+	}
+	/* RX queues. */
+	for (i = 0; i != nb_rx_queues; ++i) {
+		struct rxq *primary_rxq = (*sd->primary_priv->rxqs)[i];
+
+		if (primary_rxq == NULL)
+			continue;
+		/* Not supported yet. */
+		rx_queues[i] = NULL;
+	}
+	/* Update everything. */
+	priv->txqs = (void *)tx_queues;
+	priv->txqs_n = nb_tx_queues;
+	priv->rxqs = (void *)rx_queues;
+	priv->rxqs_n = nb_rx_queues;
+	sd->data.rx_queues = rx_queues;
+	sd->data.tx_queues = tx_queues;
+	sd->data.nb_rx_queues = nb_rx_queues;
+	sd->data.nb_tx_queues = nb_tx_queues;
+	sd->data.dev_link = sd->shared_dev_data->dev_link;
+	sd->data.mtu = sd->shared_dev_data->mtu;
+	memcpy(sd->data.rx_queue_state, sd->shared_dev_data->rx_queue_state,
+	       sizeof(sd->data.rx_queue_state));
+	memcpy(sd->data.tx_queue_state, sd->shared_dev_data->tx_queue_state,
+	       sizeof(sd->data.tx_queue_state));
+	sd->data.dev_flags = sd->shared_dev_data->dev_flags;
+	/* Use local data from now on. */
+	rte_mb();
+	priv->dev->data = &sd->data;
+	rte_mb();
+	priv->dev->tx_pkt_burst = mlx5_tx_burst;
+	priv->dev->rx_pkt_burst = removed_rx_burst;
+	priv_unlock(priv);
+end:
+	/* More sanity checks. */
+	assert(priv->dev->tx_pkt_burst == mlx5_tx_burst);
+	assert(priv->dev->rx_pkt_burst == removed_rx_burst);
+	assert(priv->dev->data == &sd->data);
+	rte_spinlock_unlock(&sd->lock);
+	return priv;
+error:
+	priv_unlock(priv);
+	rte_free(tx_queues);
+	rte_free(rx_queues);
+	rte_spinlock_unlock(&sd->lock);
+	return NULL;
+}