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>

1 files changed, 3 insertions, 1 deletions

diff --git a/include/linux/mlx4/device.h b/include/linux/mlx4/device.h
index 371086fd946..8f659cc2996 100644
--- a/include/linux/mlx4/device.h
+++ b/include/linux/mlx4/device.h
@@ -206,6 +206,7 @@ struct mlx4_caps {
         int                     reserved_cqs;
         int                     num_eqs;
         int                     reserved_eqs;
+        int                     num_comp_vectors;
         int                     num_mpts;
         int                     num_mtt_segs;
         int                     fmr_reserved_mtts;
@@ -328,6 +329,7 @@ struct mlx4_cq {
         int                     arm_sn;
 
         int                     cqn;
+        unsigned                vector;
 
         atomic_t                refcount;
         struct completion       free;
@@ -437,7 +439,7 @@ void mlx4_free_hwq_res(struct mlx4_dev *mdev, struct mlx4_hwq_resources *wqres,
 
 int mlx4_cq_alloc(struct mlx4_dev *dev, int nent, struct mlx4_mtt *mtt,
                   struct mlx4_uar *uar, u64 db_rec, struct mlx4_cq *cq,
-                  int collapsed);
+                  unsigned vector, int collapsed);
 void mlx4_cq_free(struct mlx4_dev *dev, struct mlx4_cq *cq);
 
 int mlx4_qp_reserve_range(struct mlx4_dev *dev, int cnt, int align, int *base);