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

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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>
This commit is contained in:
Noa Osherovich
2017-10-17 18:01:13 +03:00
committed by Doug Ledford
parent b4f34597a5
commit ccc8708790
4 changed files with 56 additions and 9 deletions
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8
include/uapi/rdma/mlx5-abi.h
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@@ -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 {