commit 1fb9876e9bf895ea4127ff17180f1b2ab37771b6
author Yevgeny Petrilin <yevgenyp@mellanox.co.il> Tue Mar 22 22:37:52 2011 +0000
committer David S. Miller <davem@davemloft.net> Wed Mar 23 12:24:18 2011 -0700
tree 4d26408ec346531ee99e01c0c397c73e782cacef
parent 0b7ca5a928e2271bbc225e9e1ac1f22e9fbee54f

mlx4_en: using new mlx4 interrupt scheme

Each RX ring will have its own interrupt vector, and TX rings will share one
(we mostly use polling for TX completions).
The vectors are assigned first time device is opened, and its name includes
the interface name and ring number.

Signed-off-by: Markuze Alex <markuze@mellanox.co.il>
Signed-off-by: Yevgeny Petrilin <yevgenyp@mellanox.co.il>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/mlx4/en_cq.c

diff --git a/drivers/net/mlx4/en_cq.c b/drivers/net/mlx4/en_cq.c
index 21786ad..ec4b6d0 100644
--- a/drivers/net/mlx4/en_cq.c
+++ b/drivers/net/mlx4/en_cq.c
@@ -51,13 +51,10 @@
 	int err;
 
 	cq->size = entries;
-	if (mode == RX) {
+	if (mode == RX)
 		cq->buf_size = cq->size * sizeof(struct mlx4_cqe);
-		cq->vector   = ring % mdev->dev->caps.num_comp_vectors;
-	} else {
+	else
 		cq->buf_size = sizeof(struct mlx4_cqe);
-		cq->vector   = 0;
-	}
 
 	cq->ring = ring;
 	cq->is_tx = mode;
@@ -80,7 +77,8 @@
 int mlx4_en_activate_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq)
 {
 	struct mlx4_en_dev *mdev = priv->mdev;
-	int err;
+	int err = 0;
+	char name[25];
 
 	cq->dev = mdev->pndev[priv->port];
 	cq->mcq.set_ci_db  = cq->wqres.db.db;
@@ -89,6 +87,29 @@
 	*cq->mcq.arm_db    = 0;
 	memset(cq->buf, 0, cq->buf_size);
 
+	if (cq->is_tx == RX) {
+		if (mdev->dev->caps.comp_pool) {
+			if (!cq->vector) {
+				sprintf(name , "%s-rx-%d", priv->dev->name, cq->ring);
+				if (mlx4_assign_eq(mdev->dev, name, &cq->vector)) {
+					cq->vector = (cq->ring + 1 + priv->port) %
+						mdev->dev->caps.num_comp_vectors;
+					mlx4_warn(mdev, "Failed Assigning an EQ to "
+						  "%s_rx-%d ,Falling back to legacy EQ's\n",
+						  priv->dev->name, cq->ring);
+				}
+			}
+		} else {
+			cq->vector = (cq->ring + 1 + priv->port) %
+				mdev->dev->caps.num_comp_vectors;
+		}
+	} else {
+		if (!cq->vector || !mdev->dev->caps.comp_pool) {
+			/*Fallback to legacy pool in case of error*/
+			cq->vector   = 0;
+		}
+	}
+
 	if (!cq->is_tx)
 		cq->size = priv->rx_ring[cq->ring].actual_size;
 
@@ -112,12 +133,15 @@
 	return 0;
 }
 
-void mlx4_en_destroy_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq)
+void mlx4_en_destroy_cq(struct mlx4_en_priv *priv, struct mlx4_en_cq *cq,
+			bool reserve_vectors)
 {
 	struct mlx4_en_dev *mdev = priv->mdev;
 
 	mlx4_en_unmap_buffer(&cq->wqres.buf);
 	mlx4_free_hwq_res(mdev->dev, &cq->wqres, cq->buf_size);
+	if (priv->mdev->dev->caps.comp_pool && cq->vector && !reserve_vectors)
+		mlx4_release_eq(priv->mdev->dev, cq->vector);
 	cq->buf_size = 0;
 	cq->buf = NULL;
 }