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IB/mlx5: Expose multi-packet RQ capabilities

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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: 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 18:01:12 +03:00 committed by Doug Ledford
parent b156269d88
commit b4f34597a5
3 changed files with 35 additions and 0 deletions
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16
drivers/infiniband/hw/mlx5/main.c
View File

@ -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);

5
drivers/infiniband/hw/mlx5/mlx5_ib.h
View File

@ -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;

14
include/uapi/rdma/mlx5-abi.h
View File

@ -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 {