IB/mlx5: Exposing modify CQ callback to uverbs layer

Exposed mlx5_ib_modify_cq to be called from ib device
verb list.

Signed-off-by: Yonatan Cohen <yonatanc@mellanox.com>
Reviewed-by: Majd Dibbiny <majd@mellanox.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Doug Ledford <dledford@redhat.com>

3 files changed, 8 insertions, 1 deletions

diff --git a/drivers/infiniband/hw/mlx5/cq.c b/drivers/infiniband/hw/mlx5/cq.c
index 01b218a3c277..18705cbcdc8c 100644
--- a/drivers/infiniband/hw/mlx5/cq.c
+++ b/drivers/infiniband/hw/mlx5/cq.c
@@ -1149,6 +1149,9 @@ int mlx5_ib_modify_cq(struct ib_cq *cq, u16 cq_count, u16 cq_period)
         if (!MLX5_CAP_GEN(dev->mdev, cq_moderation))
                 return -ENOSYS;
 
+        if (cq_period > MLX5_MAX_CQ_PERIOD)
+                return -EINVAL;
+
         err = mlx5_core_modify_cq_moderation(dev->mdev, &mcq->mcq,
                                              cq_period, cq_count);
         if (err)
diff --git a/drivers/infiniband/hw/mlx5/main.c b/drivers/infiniband/hw/mlx5/main.c
index d2aadb13637b..5a0ed6a499f4 100644
--- a/drivers/infiniband/hw/mlx5/main.c
+++ b/drivers/infiniband/hw/mlx5/main.c
@@ -4022,7 +4022,8 @@ static void *mlx5_ib_add(struct mlx5_core_dev *mdev)
                 (1ull << IB_USER_VERBS_EX_CMD_QUERY_DEVICE)     |
                 (1ull << IB_USER_VERBS_EX_CMD_CREATE_CQ)        |
                 (1ull << IB_USER_VERBS_EX_CMD_CREATE_QP)        |
-                (1ull << IB_USER_VERBS_EX_CMD_MODIFY_QP);
+                (1ull << IB_USER_VERBS_EX_CMD_MODIFY_QP)        |
+                (1ull << IB_USER_VERBS_EX_CMD_MODIFY_CQ);
 
         dev->ib_dev.query_device        = mlx5_ib_query_device;
         dev->ib_dev.query_port          = mlx5_ib_query_port;
diff --git a/include/linux/mlx5/cq.h b/include/linux/mlx5/cq.h
index cc718e245b1e..6be357b219ec 100644
--- a/include/linux/mlx5/cq.h
+++ b/include/linux/mlx5/cq.h
@@ -128,6 +128,9 @@ enum {
         CQE_SIZE_128_PAD = 2,
 };
 
+#define MLX5_MAX_CQ_PERIOD (BIT(__mlx5_bit_sz(cqc, cq_period)) - 1)
+#define MLX5_MAX_CQ_COUNT (BIT(__mlx5_bit_sz(cqc, cq_max_count)) - 1)
+
 static inline int cqe_sz_to_mlx_sz(u8 size, int padding_128_en)
 {
         return padding_128_en ? CQE_SIZE_128_PAD :