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IB/mlx5: Add support for CQE compressing

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CQE compressing reduces PCI overhead by coalescing and compressing
multiple CQEs into a single merged CQE. Successful compressing
improves message rate especially for small packet traffic.

CQE compressing is supported for all 64B CQE formats (with certain
limitations) generated by RQ/Responder or by SQ/Requestor.

Signed-off-by: Bodong Wang <bodong@mellanox.com>
Reviewed-by: Matan Barak <matanb@mellanox.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Bodong Wang
2016-10-31 12:16:45 +02:00
committed by Doug Ledford
parent 7e43a2a5ba
commit 1cbe6fc86c
2 changed files with 32 additions and 2 deletions
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4
include/uapi/rdma/mlx5-abi.h
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@@ -149,7 +149,9 @@ struct mlx5_ib_create_cq {
__u64 buf_addr;
__u64 db_addr;
__u32 cqe_size;
__u32 reserved; /* explicit padding (optional on i386) */
__u8 cqe_comp_en;
__u8 cqe_comp_res_format;
__u16 reserved; /* explicit padding (optional on i386) */
};
struct mlx5_ib_create_cq_resp {