IB/mlx5: Add CQ moderation capability to query_device

query_device can now obtain the maximum values for
cq_max_count and cq_period, needed for cq moderation.
Signed-off-by: NYonatan Cohen <yonatanc@mellanox.com>
Reviewed-by: NMajd Dibbiny <majd@mellanox.com>
Signed-off-by: NLeon Romanovsky <leon@kernel.org>
Signed-off-by: NDoug Ledford <dledford@redhat.com>

drivers/infiniband/hw/mlx5/main.c

@@ -790,6 +790,13 @@ static int mlx5_ib_query_device(struct ib_device *ibdev,
 		props->tm_caps.max_sge = MLX5_TM_MAX_SGE;
 	}
 
+	if (MLX5_CAP_GEN(dev->mdev, cq_moderation)) {
+		props->cq_caps.max_cq_moderation_count =
+						MLX5_MAX_CQ_COUNT;
+		props->cq_caps.max_cq_moderation_period =
+						MLX5_MAX_CQ_PERIOD;
+	}
+
 	if (field_avail(typeof(resp), cqe_comp_caps, uhw->outlen)) {
 		resp.cqe_comp_caps.max_num =
 			MLX5_CAP_GEN(dev->mdev, cqe_compression) ?