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>
diff --git a/drivers/infiniband/hw/mlx5/mlx5_ib.h b/drivers/infiniband/hw/mlx5/mlx5_ib.h
index 8de4085..e7deaa0 100644
--- a/drivers/infiniband/hw/mlx5/mlx5_ib.h
+++ b/drivers/infiniband/hw/mlx5/mlx5_ib.h
@@ -254,6 +254,7 @@ struct mlx5_ib_wq {
enum mlx5_ib_wq_flags {
MLX5_IB_WQ_FLAGS_DELAY_DROP = 0x1,
+ MLX5_IB_WQ_FLAGS_STRIDING_RQ = 0x2,
};
#define MLX5_MIN_SINGLE_WQE_LOG_NUM_STRIDES 9
@@ -269,6 +270,9 @@ struct mlx5_ib_rwq {
u32 log_rq_size;
u32 rq_page_offset;
u32 log_page_size;
+ u32 log_num_strides;
+ u32 two_byte_shift_en;
+ u32 single_stride_log_num_of_bytes;
struct ib_umem *umem;
size_t buf_size;
unsigned int page_shift;