[ofa-general] [PATCH] IB/mlx4: interrupt coalescing

[Michael S. Tsirkin]

Enable interrupt coalescing for CQs in mlx4.

Signed-off-by: Michael S. Tsirkin <mst at dev.mellanox.co.il>

---

diff --git a/drivers/net/mlx4/cq.c b/drivers/net/mlx4/cq.c
index 39253d0..b58dd75 100644
--- a/drivers/net/mlx4/cq.c
+++ b/drivers/net/mlx4/cq.c
@@ -42,6 +42,14 @@
 #include "mlx4.h"
 #include "icm.h"
 
+static int cq_max_count = 16;
+static int cq_period = 10;
+
+module_param(cq_max_count, int, 0444);
+MODULE_PARM_DESC(cq_max_count, "number of CQEs to generate event");
+module_param(cq_period, int, 0444);
+MODULE_PARM_DESC(cq_period, "time in usec for CQ event generation");
+
 struct mlx4_cq_context {
 	__be32			flags;
 	u16			reserved1[3];
@@ -174,6 +182,8 @@ int mlx4_cq_alloc(struct mlx4_dev *dev, int nent, struct mlx4_mtt *mtt,
 	cq_context->mtt_base_addr_h = mtt_addr >> 32;
 	cq_context->mtt_base_addr_l = cpu_to_be32(mtt_addr & 0xffffffff);
 	cq_context->db_rec_addr     = cpu_to_be64(db_rec);
+	cq_context->cq_max_count    = cq_max_count;
+	cq_context->cq_period       = cq_period;
 
 	err = mlx4_SW2HW_CQ(dev, mailbox, cq->cqn);
 	mlx4_free_cmd_mailbox(dev, mailbox);


-- 
MST