[dpdk-dev] [PATCH v5] net/mlx5: support device removal event

[Matan Azrad <matan@mellanox.com>]

Extend the LSC event handling to support the device removal as well.

The mlx5 event handling has been made capable of receiving and
signaling several event types at once.

This support includes next:
1. Removal event detection according to the user configuration.
2. Calling to all registered mlx5 removal callbacks.
3. Capabilities extension to include removal interrupt handling.

Signed-off-by: Matan Azrad <matan@mellanox.com>
---
 doc/guides/nics/features/mlx5.ini |  1 +
 drivers/net/mlx5/mlx5.c           |  2 +-
 drivers/net/mlx5/mlx5_ethdev.c    | 13 +++++++++++--
 3 files changed, 13 insertions(+), 3 deletions(-)

V5 for adding support in mlx5 feature doc.

diff --git a/doc/guides/nics/features/mlx5.ini b/doc/guides/nics/features/mlx5.ini
index 2913591..20a1461 100644
--- a/doc/guides/nics/features/mlx5.ini
+++ b/doc/guides/nics/features/mlx5.ini
@@ -7,6 +7,7 @@
 Speed capabilities   = Y
 Link status          = Y
 Link status event    = Y
+Removal event        = Y
 Rx interrupt         = Y
 Queue start/stop     = Y
 MTU update           = Y
diff --git a/drivers/net/mlx5/mlx5.c b/drivers/net/mlx5/mlx5.c
index 32081a4..99a2fb3 100644
--- a/drivers/net/mlx5/mlx5.c
+++ b/drivers/net/mlx5/mlx5.c
@@ -870,7 +870,7 @@ static struct rte_pci_driver mlx5_driver = {
 	},
 	.id_table = mlx5_pci_id_map,
 	.probe = mlx5_pci_probe,
-	.drv_flags = RTE_PCI_DRV_INTR_LSC,
+	.drv_flags = RTE_PCI_DRV_INTR_LSC | RTE_PCI_DRV_INTR_RMV,
 };
 
 /**
diff --git a/drivers/net/mlx5/mlx5_ethdev.c b/drivers/net/mlx5/mlx5_ethdev.c
index 64a8db8..b57de4b 100644
--- a/drivers/net/mlx5/mlx5_ethdev.c
+++ b/drivers/net/mlx5/mlx5_ethdev.c
@@ -1172,6 +1172,9 @@ priv_dev_status_handler(struct priv *priv)
 			event.event_type == IBV_EVENT_PORT_ERR) &&
 			(priv->dev->data->dev_conf.intr_conf.lsc == 1))
 			ret |= (1 << RTE_ETH_EVENT_INTR_LSC);
+		else if (event.event_type == IBV_EVENT_DEVICE_FATAL &&
+			priv->dev->data->dev_conf.intr_conf.rmv == 1)
+			ret |= (1 << RTE_ETH_EVENT_INTR_RMV);
 		else
 			DEBUG("event type %d on port %d not handled",
 			      event.event_type, event.element.port_num);
@@ -1227,6 +1230,9 @@ mlx5_dev_interrupt_handler(void *cb_arg)
 	if (events & (1 << RTE_ETH_EVENT_INTR_LSC))
 		_rte_eth_dev_callback_process(dev, RTE_ETH_EVENT_INTR_LSC, NULL,
 					      NULL);
+	if (events & (1 << RTE_ETH_EVENT_INTR_RMV))
+		_rte_eth_dev_callback_process(dev, RTE_ETH_EVENT_INTR_RMV, NULL,
+					      NULL);
 }
 
 /**
@@ -1240,7 +1246,8 @@ mlx5_dev_interrupt_handler(void *cb_arg)
 void
 priv_dev_interrupt_handler_uninstall(struct priv *priv, struct rte_eth_dev *dev)
 {
-	if (!dev->data->dev_conf.intr_conf.lsc)
+	if (!dev->data->dev_conf.intr_conf.lsc &&
+		!dev->data->dev_conf.intr_conf.rmv)
 		return;
 	rte_intr_callback_unregister(&priv->intr_handle,
 				     mlx5_dev_interrupt_handler,
@@ -1265,7 +1272,8 @@ priv_dev_interrupt_handler_install(struct priv *priv, struct rte_eth_dev *dev)
 {
 	int rc, flags;
 
-	if (!dev->data->dev_conf.intr_conf.lsc)
+	if (!dev->data->dev_conf.intr_conf.lsc &&
+		!dev->data->dev_conf.intr_conf.rmv)
 		return;
 	assert(priv->ctx->async_fd > 0);
 	flags = fcntl(priv->ctx->async_fd, F_GETFL);
@@ -1273,6 +1281,7 @@ priv_dev_interrupt_handler_install(struct priv *priv, struct rte_eth_dev *dev)
 	if (rc < 0) {
 		INFO("failed to change file descriptor async event queue");
 		dev->data->dev_conf.intr_conf.lsc = 0;
+		dev->data->dev_conf.intr_conf.rmv = 0;
 	} else {
 		priv->intr_handle.fd = priv->ctx->async_fd;
 		priv->intr_handle.type = RTE_INTR_HANDLE_EXT;
-- 
2.7.4