mlx4_core: Add support for multiple completion event vectors

When using MSI-X mode, create a completion event queue for each CPU.
Report the number of completion EQs in a new struct mlx4_caps member,
num_comp_vectors, and extend the mlx4_cq_alloc() interface with a
vector parameter so that consumers can specify which completion EQ
should be used to report events for the CQ being created.

Signed-off-by: Yevgeny Petrilin <yevgenyp@mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

2 files changed, 2 insertions, 2 deletions

diff --git a/drivers/infiniband/hw/mlx4/cq.c b/drivers/infiniband/hw/mlx4/cq.c
index 18308494a195..2198753bf13d 100644
--- a/drivers/infiniband/hw/mlx4/cq.c
+++ b/drivers/infiniband/hw/mlx4/cq.c
@@ -222,7 +222,7 @@ struct ib_cq *mlx4_ib_create_cq(struct ib_device *ibdev, int entries, int vector
         }
 
         err = mlx4_cq_alloc(dev->dev, entries, &cq->buf.mtt, uar,
-                            cq->db.dma, &cq->mcq, 0);
+                            cq->db.dma, &cq->mcq, vector, 0);
         if (err)
                 goto err_dbmap;
 
diff --git a/drivers/infiniband/hw/mlx4/main.c b/drivers/infiniband/hw/mlx4/main.c
index 2e80f8f47b02..dcefe1fceb5c 100644
--- a/drivers/infiniband/hw/mlx4/main.c
+++ b/drivers/infiniband/hw/mlx4/main.c
@@ -578,7 +578,7 @@ static void *mlx4_ib_add(struct mlx4_dev *dev)
         mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_IB)
                 ibdev->num_ports++;
         ibdev->ib_dev.phys_port_cnt     = ibdev->num_ports;
-        ibdev->ib_dev.num_comp_vectors  = 1;
+        ibdev->ib_dev.num_comp_vectors  = dev->caps.num_comp_vectors;
         ibdev->ib_dev.dma_device        = &dev->pdev->dev;
 
         ibdev->ib_dev.uverbs_abi_ver    = MLX4_IB_UVERBS_ABI_VERSION;