IB/mlx5: Allow creation of a multi-packet RQ

Allow creation of a multi-packet receive queue.

In order to create a multi-packet RQ, the following fields in
the mlx5_ib_rwq should be set:
- log_num_strides: Log of number of strides per WQE
- single_stride_log_num_of_bytes: Log of a single stride size
- two_byte_shift_en: When enabled, hardware pads 2 bytes of zeros
  before writing the message to memory (e.g. for the IP alignment).

Signed-off-by: Noa Osherovich <noaos@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>

1 files changed, 7 insertions, 1 deletions

diff --git a/include/uapi/rdma/mlx5-abi.h b/include/uapi/rdma/mlx5-abi.h
index 0832d9502200..b1d5b87ba3fd 100644
--- a/include/uapi/rdma/mlx5-abi.h
+++ b/include/uapi/rdma/mlx5-abi.h
@@ -308,6 +308,10 @@ struct mlx5_ib_alloc_mw {
 	__u16	reserved2;
 };
 
+enum mlx5_ib_create_wq_mask {
+	MLX5_IB_CREATE_WQ_STRIDING_RQ	= (1 << 0),
+};
+
 struct mlx5_ib_create_wq {
 	__u64   buf_addr;
 	__u64   db_addr;
@@ -316,7 +320,9 @@ struct mlx5_ib_create_wq {
 	__u32   user_index;
 	__u32   flags;
 	__u32   comp_mask;
-	__u32   reserved;
+	__u32	single_stride_log_num_of_bytes;
+	__u32	single_wqe_log_num_of_strides;
+	__u32	two_byte_shift_en;
 };
 
 struct mlx5_ib_create_ah_resp {