Commit 7e43a2a5 authored by Bodong Wang's avatar Bodong Wang Committed by Doug Ledford
Browse files

IB/mlx5: Report mlx5 CQE compression caps during query 



The capabilities include:
- Max number of compressed and aggregated CQEs in a single session,
  while zero means unsupported.
- For Responder, there are two formats of mini CQE: mini CQE with Rx
  hash and mini CQE with checksum. They're mutual exclusive.

Signed-off-by: default avatarBodong Wang <bodong@mellanox.com>
Reviewed-by: default avatarMatan Barak <matanb@mellanox.com>
Signed-off-by: default avatarLeon Romanovsky <leon@kernel.org>
Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
parent 191ded4a

drivers/infiniband/hw/mlx5/main.c

+10 −0
Original line number Diff line number Diff line
@@ -683,6 +683,16 @@ static int mlx5_ib_query_device(struct ib_device *ibdev, 
	if (field_avail(typeof(resp), reserved, uhw->outlen))

		resp.response_length += sizeof(resp.reserved);



	if (field_avail(typeof(resp), cqe_comp_caps, uhw->outlen)) {

		resp.cqe_comp_caps.max_num =

			MLX5_CAP_GEN(dev->mdev, cqe_compression) ?

			MLX5_CAP_GEN(dev->mdev, cqe_compression_max_num) : 0;

		resp.cqe_comp_caps.supported_format =

			MLX5_IB_CQE_RES_FORMAT_HASH |

			MLX5_IB_CQE_RES_FORMAT_CSUM;

		resp.response_length += sizeof(resp.cqe_comp_caps);

	}



	if (uhw->outlen) {

		err = ib_copy_to_udata(uhw, &resp, resp.response_length);

include/uapi/rdma/mlx5-abi.h

+12 −0
Original line number Diff line number Diff line
@@ -124,11 +124,23 @@ struct mlx5_ib_rss_caps { 
	__u8 reserved[7];

};



enum mlx5_ib_cqe_comp_res_format {

	MLX5_IB_CQE_RES_FORMAT_HASH	= 1 << 0,

	MLX5_IB_CQE_RES_FORMAT_CSUM	= 1 << 1,

	MLX5_IB_CQE_RES_RESERVED	= 1 << 2,

};



struct mlx5_ib_cqe_comp_caps {

	__u32 max_num;

	__u32 supported_format; /* enum mlx5_ib_cqe_comp_res_format */

};



struct mlx5_ib_query_device_resp {

	__u32	comp_mask;

	__u32	response_length;

	struct	mlx5_ib_tso_caps tso_caps;

	struct	mlx5_ib_rss_caps rss_caps;

	struct	mlx5_ib_cqe_comp_caps cqe_comp_caps;

	__u32	mlx5_ib_support_multi_pkt_send_wqes;

	__u32	reserved;

};

CRA Git | Maintained and supported by SUSTech CRA and CCSE