From c7bf62255edf718f49f3c5279463e23b6a2199ac Mon Sep 17 00:00:00 2001 From: Yongseok Koh Date: Wed, 17 Jan 2018 09:44:13 -0800 Subject: [PATCH] net/mlx5: fix handling link status event Even though link of a port gets down, device still can receive traffic. That is the reason why mlx5_set_link_up/down() switches rx/tx_pkt_burst(). However, if link gets down by an external command (e.g. ifconfig), it isn't effective. It is better to change burst functions when link status change is detected. Fixes: 62072098b54e ("mlx5: support setting link up or down") Cc: stable@dpdk.org Signed-off-by: Yongseok Koh Acked-by: Nelio Laranjeiro --- drivers/net/mlx5/mlx5.c | 1 - drivers/net/mlx5/mlx5.h | 1 + drivers/net/mlx5/mlx5_ethdev.c | 118 ++++++++++++++++++++++++-------- drivers/net/mlx5/mlx5_trigger.c | 23 ++----- 4 files changed, 95 insertions(+), 48 deletions(-) diff --git a/drivers/net/mlx5/mlx5.c b/drivers/net/mlx5/mlx5.c index 1c95f3520e..fc2d59fee5 100644 --- a/drivers/net/mlx5/mlx5.c +++ b/drivers/net/mlx5/mlx5.c @@ -869,7 +869,6 @@ mlx5_pci_probe(struct rte_pci_driver *pci_drv, struct rte_pci_device *pci_dev) /* Bring Ethernet device up. */ DEBUG("forcing Ethernet interface up"); priv_set_flags(priv, ~IFF_UP, IFF_UP); - mlx5_link_update(priv->dev, 1); /* Store device configuration on private structure. */ priv->config = config; continue; diff --git a/drivers/net/mlx5/mlx5.h b/drivers/net/mlx5/mlx5.h index e740a4e777..9a4a59bd48 100644 --- a/drivers/net/mlx5/mlx5.h +++ b/drivers/net/mlx5/mlx5.h @@ -225,6 +225,7 @@ int priv_set_flags(struct priv *, unsigned int, unsigned int); int mlx5_dev_configure(struct rte_eth_dev *); void mlx5_dev_infos_get(struct rte_eth_dev *, struct rte_eth_dev_info *); const uint32_t *mlx5_dev_supported_ptypes_get(struct rte_eth_dev *dev); +int priv_link_update(struct priv *, int); int mlx5_link_update(struct rte_eth_dev *, int); int mlx5_dev_set_mtu(struct rte_eth_dev *, uint16_t); int mlx5_dev_get_flow_ctrl(struct rte_eth_dev *, struct rte_eth_fc_conf *); diff --git a/drivers/net/mlx5/mlx5_ethdev.c b/drivers/net/mlx5/mlx5_ethdev.c index 6f78adc4ab..9a2ebd80ce 100644 --- a/drivers/net/mlx5/mlx5_ethdev.c +++ b/drivers/net/mlx5/mlx5_ethdev.c @@ -885,25 +885,104 @@ mlx5_link_update_unlocked_gs(struct rte_eth_dev *dev, int wait_to_complete) } /** - * DPDK callback to retrieve physical link information. + * Enable receiving and transmitting traffic. * - * @param dev - * Pointer to Ethernet device structure. + * @param priv + * Pointer to private structure. + */ +static void +priv_link_start(struct priv *priv) +{ + struct rte_eth_dev *dev = priv->dev; + int err; + + dev->tx_pkt_burst = priv_select_tx_function(priv, dev); + dev->rx_pkt_burst = priv_select_rx_function(priv, dev); + err = priv_dev_traffic_enable(priv, dev); + if (err) + ERROR("%p: error occurred while configuring control flows: %s", + (void *)priv, strerror(err)); + err = priv_flow_start(priv, &priv->flows); + if (err) + ERROR("%p: error occurred while configuring flows: %s", + (void *)priv, strerror(err)); +} + +/** + * Disable receiving and transmitting traffic. + * + * @param priv + * Pointer to private structure. + */ +static void +priv_link_stop(struct priv *priv) +{ + struct rte_eth_dev *dev = priv->dev; + + priv_flow_stop(priv, &priv->flows); + priv_dev_traffic_disable(priv, dev); + dev->rx_pkt_burst = removed_rx_burst; + dev->tx_pkt_burst = removed_tx_burst; +} + +/** + * Retrieve physical link information and update rx/tx_pkt_burst callbacks + * accordingly. + * + * @param priv + * Pointer to private structure. * @param wait_to_complete * Wait for request completion (ignored). */ int -mlx5_link_update(struct rte_eth_dev *dev, int wait_to_complete) +priv_link_update(struct priv *priv, int wait_to_complete) { + struct rte_eth_dev *dev = priv->dev; struct utsname utsname; int ver[3]; + int ret; + struct rte_eth_link dev_link = dev->data->dev_link; if (uname(&utsname) == -1 || sscanf(utsname.release, "%d.%d.%d", &ver[0], &ver[1], &ver[2]) != 3 || KERNEL_VERSION(ver[0], ver[1], ver[2]) < KERNEL_VERSION(4, 9, 0)) - return mlx5_link_update_unlocked_gset(dev, wait_to_complete); - return mlx5_link_update_unlocked_gs(dev, wait_to_complete); + ret = mlx5_link_update_unlocked_gset(dev, wait_to_complete); + else + ret = mlx5_link_update_unlocked_gs(dev, wait_to_complete); + /* If lsc interrupt is disabled, should always be ready for traffic. */ + if (!dev->data->dev_conf.intr_conf.lsc) { + priv_link_start(priv); + return ret; + } + /* Re-select burst callbacks only if link status has been changed. */ + if (!ret && dev_link.link_status != dev->data->dev_link.link_status) { + if (dev->data->dev_link.link_status == ETH_LINK_UP) + priv_link_start(priv); + else + priv_link_stop(priv); + } + return ret; +} + +/** + * DPDK callback to retrieve physical link information. + * + * @param dev + * Pointer to Ethernet device structure. + * @param wait_to_complete + * Wait for request completion (ignored). + */ +int +mlx5_link_update(struct rte_eth_dev *dev, int wait_to_complete) +{ + struct priv *priv = dev->data->dev_private; + int ret; + + priv_lock(priv); + ret = priv_link_update(priv, wait_to_complete); + priv_unlock(priv); + return ret; } /** @@ -1113,7 +1192,7 @@ priv_link_status_update(struct priv *priv) { struct rte_eth_link *link = &priv->dev->data->dev_link; - mlx5_link_update(priv->dev, 0); + priv_link_update(priv, 0); if (((link->link_speed == 0) && link->link_status) || ((link->link_speed != 0) && !link->link_status)) { /* @@ -1312,8 +1391,6 @@ priv_dev_interrupt_handler_install(struct priv *priv, struct rte_eth_dev *dev) * * @param priv * Pointer to private data structure. - * @param dev - * Pointer to rte_eth_dev structure. * @param up * Nonzero for link up, otherwise link down. * @@ -1321,24 +1398,9 @@ priv_dev_interrupt_handler_install(struct priv *priv, struct rte_eth_dev *dev) * 0 on success, errno value on failure. */ static int -priv_dev_set_link(struct priv *priv, struct rte_eth_dev *dev, int up) +priv_dev_set_link(struct priv *priv, int up) { - int err; - - if (up) { - err = priv_set_flags(priv, ~IFF_UP, IFF_UP); - if (err) - return err; - dev->tx_pkt_burst = priv_select_tx_function(priv, dev); - dev->rx_pkt_burst = priv_select_rx_function(priv, dev); - } 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; + return priv_set_flags(priv, ~IFF_UP, up ? IFF_UP : ~IFF_UP); } /** @@ -1357,7 +1419,7 @@ mlx5_set_link_down(struct rte_eth_dev *dev) int err; priv_lock(priv); - err = priv_dev_set_link(priv, dev, 0); + err = priv_dev_set_link(priv, 0); priv_unlock(priv); return err; } @@ -1378,7 +1440,7 @@ mlx5_set_link_up(struct rte_eth_dev *dev) int err; priv_lock(priv); - err = priv_dev_set_link(priv, dev, 1); + err = priv_dev_set_link(priv, 1); priv_unlock(priv); return err; } diff --git a/drivers/net/mlx5/mlx5_trigger.c b/drivers/net/mlx5/mlx5_trigger.c index 1a20967a20..6f5c799b50 100644 --- a/drivers/net/mlx5/mlx5_trigger.c +++ b/drivers/net/mlx5/mlx5_trigger.c @@ -151,38 +151,23 @@ mlx5_dev_start(struct rte_eth_dev *dev) (void *)dev, strerror(err)); goto error; } - /* Update send callback. */ - dev->tx_pkt_burst = priv_select_tx_function(priv, dev); err = priv_rxq_start(priv); if (err) { ERROR("%p: RXQ allocation failed: %s", (void *)dev, strerror(err)); goto error; } - /* Update receive callback. */ - dev->rx_pkt_burst = priv_select_rx_function(priv, dev); - err = priv_dev_traffic_enable(priv, dev); - if (err) { - ERROR("%p: an error occurred while configuring control flows:" - " %s", - (void *)priv, strerror(err)); - goto error; - } - err = priv_flow_start(priv, &priv->flows); - if (err) { - ERROR("%p: an error occurred while configuring flows:" - " %s", - (void *)priv, strerror(err)); - goto error; - } err = priv_rx_intr_vec_enable(priv); if (err) { ERROR("%p: RX interrupt vector creation failed", (void *)priv); goto error; } - priv_dev_interrupt_handler_install(priv, dev); priv_xstats_init(priv); + /* Update link status and Tx/Rx callbacks for the first time. */ + memset(&dev->data->dev_link, 0, sizeof(struct rte_eth_link)); + priv_link_update(priv, 1); + priv_dev_interrupt_handler_install(priv, dev); priv_unlock(priv); return 0; error: -- 2.20.1