#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
#include <rte_ethdev.h>
#include <rte_mbuf.h>
#include <rte_common.h>
+#include <rte_interrupts.h>
+#include <rte_alarm.h>
#ifdef PEDANTIC
#pragma GCC diagnostic error "-pedantic"
#endif
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.
*
* 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.
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;
+ unsigned int i;
+ unsigned int j;
+ unsigned int reta_idx_n;
priv->rxqs = (void *)dev->data->rx_queues;
priv->txqs = (void *)dev->data->tx_queues;
(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);
- /* 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;
+ /* 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;
}
/**
max = 65535;
info->max_rx_queues = max;
info->max_tx_queues = max;
- /* Last array entry is reserved for broadcast. */
- info->max_mac_addrs = (RTE_DIM(priv->mac) - 1);
+ info->max_mac_addrs = RTE_DIM(priv->mac);
info->rx_offload_capa =
(priv->hw_csum ?
(DEV_RX_OFFLOAD_IPV4_CKSUM |
0);
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;
+ 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 = dev->data->dev_private;
+ 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);
+ 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 = dev->data->dev_private;
+ 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;
+
+ 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;
+
+ 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.
+ */
+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;
+
+ 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;
}
/**
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;
+}