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Commit b4f34597 authored by Noa Osherovich's avatar Noa Osherovich Committed by Doug Ledford
Browse files

IB/mlx5: Expose multi-packet RQ capabilities 



This patch reports the device's striding RQ capabilities to
the user-space:
- min/max_single_stride_log_num_of_bytes: Log of min/max number of
  bytes in a single stride.
- min/max_single_wqe_log_num_of_strides: Log of min/max number of
  strides in a single WQE.
- supported_qpts: A bit mask to know which QP types support multi-
  packet RQ, for now only Raw Packet QPs.

Signed-off-by: default avatarNoa Osherovich <noaos@mellanox.com>
Reviewed-by: default avatarMajd Dibbiny <majd@mellanox.com>
Signed-off-by: default avatarLeon Romanovsky <leon@kernel.org>
Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
parent b156269d

drivers/infiniband/hw/mlx5/main.c

+16 −0
Original line number Original line Diff line number Diff line
@@ -848,6 +848,22 @@ static int mlx5_ib_query_device(struct ib_device *ibdev, 
		}

		}

	}

	}





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

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

		if (MLX5_CAP_GEN(mdev, striding_rq)) {

			resp.striding_rq_caps.min_single_stride_log_num_of_bytes =

				MLX5_MIN_SINGLE_STRIDE_LOG_NUM_BYTES;

			resp.striding_rq_caps.max_single_stride_log_num_of_bytes =

				MLX5_MAX_SINGLE_STRIDE_LOG_NUM_BYTES;

			resp.striding_rq_caps.min_single_wqe_log_num_of_strides =

				MLX5_MIN_SINGLE_WQE_LOG_NUM_STRIDES;

			resp.striding_rq_caps.max_single_wqe_log_num_of_strides =

				MLX5_MAX_SINGLE_WQE_LOG_NUM_STRIDES;

			resp.striding_rq_caps.supported_qpts =

				BIT(IB_QPT_RAW_PACKET);

		}

	}



	if (uhw->outlen) {

	if (uhw->outlen) {

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

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

drivers/infiniband/hw/mlx5/mlx5_ib.h

+5 −0
Original line number Original line Diff line number Diff line
@@ -256,6 +256,11 @@ enum mlx5_ib_wq_flags { 
	MLX5_IB_WQ_FLAGS_DELAY_DROP = 0x1,

	MLX5_IB_WQ_FLAGS_DELAY_DROP = 0x1,

};

};





#define MLX5_MIN_SINGLE_WQE_LOG_NUM_STRIDES 9

#define MLX5_MAX_SINGLE_WQE_LOG_NUM_STRIDES 16

#define MLX5_MIN_SINGLE_STRIDE_LOG_NUM_BYTES 6

#define MLX5_MAX_SINGLE_STRIDE_LOG_NUM_BYTES 13



struct mlx5_ib_rwq {

struct mlx5_ib_rwq {

	struct ib_wq		ibwq;

	struct ib_wq		ibwq;

	struct mlx5_core_qp	core_qp;

	struct mlx5_core_qp	core_qp;

include/uapi/rdma/mlx5-abi.h

+14 −0
Original line number Original line Diff line number Diff line
@@ -190,6 +190,19 @@ struct mlx5_ib_sw_parsing_caps { 
	__u32 supported_qpts;

	__u32 supported_qpts;

};

};





struct mlx5_ib_striding_rq_caps {

	__u32 min_single_stride_log_num_of_bytes;

	__u32 max_single_stride_log_num_of_bytes;

	__u32 min_single_wqe_log_num_of_strides;

	__u32 max_single_wqe_log_num_of_strides;



	/* Corresponding bit will be set if qp type from

	 * 'enum ib_qp_type' is supported, e.g.

	 * supported_qpts |= 1 << IB_QPT_RAW_PACKET

	 */

	__u32 supported_qpts;

};



struct mlx5_ib_query_device_resp {

struct mlx5_ib_query_device_resp {

	__u32	comp_mask;

	__u32	comp_mask;

	__u32	response_length;

	__u32	response_length;
@@ -200,6 +213,7 @@ struct mlx5_ib_query_device_resp { 
	__u32	mlx5_ib_support_multi_pkt_send_wqes;

	__u32	mlx5_ib_support_multi_pkt_send_wqes;

	__u32	reserved;

	__u32	reserved;

	struct mlx5_ib_sw_parsing_caps sw_parsing_caps;

	struct mlx5_ib_sw_parsing_caps sw_parsing_caps;

	struct mlx5_ib_striding_rq_caps striding_rq_caps;

};

};





struct mlx5_ib_create_cq {

struct mlx5_ib_create_cq {