[dpdk-dev] [PATCH v2 12/13] net/mlx5: update event handler for multiport IB devices

[Viacheslav Ovsiienko <viacheslavo@mellanox.com>]

This patch modifies asynchronous event handler to support multiport
Infiniband devices. Handler queries the event parameters, including
event source port index, and invokes the handler for specific
devices with appropriate port_id.

Signed-off-by: Viacheslav Ovsiienko <viacheslavo@mellanox.com>
---
 drivers/net/mlx5/mlx5_ethdev.c | 101 +++++++++++++++++++++--------------------
 1 file changed, 51 insertions(+), 50 deletions(-)

diff --git a/drivers/net/mlx5/mlx5_ethdev.c b/drivers/net/mlx5/mlx5_ethdev.c
index d41f66b..5871c62 100644
--- a/drivers/net/mlx5/mlx5_ethdev.c
+++ b/drivers/net/mlx5/mlx5_ethdev.c
@@ -1032,66 +1032,67 @@ int mlx5_fw_version_get(struct rte_eth_dev *dev, char *fw_ver, size_t fw_size)
 }
 
 /**
- * Device status handler.
+ * Handle shared asynchronous events the NIC (removal event
+ * and link status change). Supports multiport IB device.
  *
- * @param dev
- *   Pointer to Ethernet device.
- * @param events
- *   Pointer to event flags holder.
- *
- * @return
- *   Events bitmap of callback process which can be called immediately.
+ * @param cb_arg
+ *   Callback argument.
  */
-static uint32_t
-mlx5_dev_status_handler(struct rte_eth_dev *dev)
+void
+mlx5_dev_interrupt_handler(void *cb_arg)
 {
-	struct mlx5_priv *priv = dev->data->dev_private;
+	struct mlx5_ibv_shared *sh = cb_arg;
 	struct ibv_async_event event;
-	uint32_t ret = 0;
 
-	if (mlx5_link_update(dev, 0) == -EAGAIN) {
-		usleep(0);
-		return 0;
-	}
-	/* Read all message and acknowledge them. */
+	/* Read all message from the IB device and acknowledge them. */
 	for (;;) {
-		if (mlx5_glue->get_async_event(priv->sh->ctx, &event))
+		struct rte_eth_dev *dev;
+		uint32_t tmp;
+
+		if (mlx5_glue->get_async_event(sh->ctx, &event))
 			break;
+		/* Retrieve and check IB port index. */
+		tmp = (uint32_t)event.element.port_num;
+		assert(tmp && (tmp <= sh->max_port));
+		if (!tmp ||
+		    tmp > sh->max_port ||
+		    sh->port[tmp - 1].ih_port_id >= RTE_MAX_ETHPORTS) {
+			/*
+			 * Invalid IB port index or no handler
+			 * installed for this port.
+			 */
+			mlx5_glue->ack_async_event(&event);
+			continue;
+		}
+		/* Retrieve ethernet device descriptor. */
+		tmp = sh->port[tmp - 1].ih_port_id;
+		dev = &rte_eth_devices[tmp];
+		tmp = 0;
+		assert(dev);
 		if ((event.event_type == IBV_EVENT_PORT_ACTIVE ||
-			event.event_type == IBV_EVENT_PORT_ERR) &&
-			(dev->data->dev_conf.intr_conf.lsc == 1))
-			ret |= (1 << RTE_ETH_EVENT_INTR_LSC);
-		else if (event.event_type == IBV_EVENT_DEVICE_FATAL &&
-			dev->data->dev_conf.intr_conf.rmv == 1)
-			ret |= (1 << RTE_ETH_EVENT_INTR_RMV);
-		else
-			DRV_LOG(DEBUG,
-				"port %u event type %d on not handled",
-				dev->data->port_id, event.event_type);
+		     event.event_type == IBV_EVENT_PORT_ERR) &&
+			dev->data->dev_conf.intr_conf.lsc) {
+			mlx5_glue->ack_async_event(&event);
+			if (mlx5_link_update(dev, 0) == -EAGAIN) {
+				usleep(0);
+				continue;
+			}
+			_rte_eth_dev_callback_process
+				(dev, RTE_ETH_EVENT_INTR_LSC, NULL);
+			continue;
+		}
+		if (event.event_type == IBV_EVENT_DEVICE_FATAL &&
+		    dev->data->dev_conf.intr_conf.rmv) {
+			mlx5_glue->ack_async_event(&event);
+			_rte_eth_dev_callback_process
+				(dev, RTE_ETH_EVENT_INTR_RMV, NULL);
+			continue;
+		}
+		DRV_LOG(DEBUG,
+			"port %u event type %d on not handled",
+			dev->data->port_id, event.event_type);
 		mlx5_glue->ack_async_event(&event);
 	}
-	return ret;
-}
-
-/**
- * Handle interrupts from the NIC.
- *
- * @param[in] intr_handle
- *   Interrupt handler.
- * @param cb_arg
- *   Callback argument.
- */
-void
-mlx5_dev_interrupt_handler(void *cb_arg)
-{
-	struct rte_eth_dev *dev = cb_arg;
-	uint32_t events;
-
-	events = mlx5_dev_status_handler(dev);
-	if (events & (1 << RTE_ETH_EVENT_INTR_LSC))
-		_rte_eth_dev_callback_process(dev, RTE_ETH_EVENT_INTR_LSC, NULL);
-	if (events & (1 << RTE_ETH_EVENT_INTR_RMV))
-		_rte_eth_dev_callback_process(dev, RTE_ETH_EVENT_INTR_RMV, NULL);
 }
 
 /**
-- 
1.8.3.1