IB/mlx4: Add support for resizing CQs

Signed-off-by: Vladimir Sokolovsky <vlad@mellanox.co.il>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

1 files changed, 9 insertions, 0 deletions

diff --git a/drivers/infiniband/hw/mlx4/mlx4_ib.h b/drivers/infiniband/hw/mlx4/mlx4_ib.h
index ef8ad96e1432..9e637323c155 100644
--- a/drivers/infiniband/hw/mlx4/mlx4_ib.h
+++ b/drivers/infiniband/hw/mlx4/mlx4_ib.h
@@ -78,13 +78,21 @@ struct mlx4_ib_cq_buf {
         struct mlx4_mtt         mtt;
 };
 
+struct mlx4_ib_cq_resize {
+        struct mlx4_ib_cq_buf   buf;
+        int                     cqe;
+};
+
 struct mlx4_ib_cq {
         struct ib_cq            ibcq;
         struct mlx4_cq          mcq;
         struct mlx4_ib_cq_buf   buf;
+        struct mlx4_ib_cq_resize *resize_buf;
         struct mlx4_ib_db       db;
         spinlock_t              lock;
+        struct mutex            resize_mutex;
         struct ib_umem         *umem;
+        struct ib_umem         *resize_umem;
 };
 
 struct mlx4_ib_mr {
@@ -255,6 +263,7 @@ struct ib_mr *mlx4_ib_reg_user_mr(struct ib_pd *pd, u64 start, u64 length,
 int mlx4_ib_dereg_mr(struct ib_mr *mr);
 
 int mlx4_ib_modify_cq(struct ib_cq *cq, u16 cq_count, u16 cq_period);
+int mlx4_ib_resize_cq(struct ib_cq *ibcq, int entries, struct ib_udata *udata);
 struct ib_cq *mlx4_ib_create_cq(struct ib_device *ibdev, int entries, int vector,
                                 struct ib_ucontext *context,
                                 struct ib_udata *udata);