HNSDV_QUERY_DEVICE(3)

NAME
hnsdv_query_device - Query hns device specific attributes

SYNOPSIS

        #include <infiniband/hnsdv.h>
        int hnsdv_query_device(struct ibv_context *context,
                               struct hnsdv_context *attrs_out);

DESCRIPTION
hnsdv_query_device() Queries hns device specific attributes.

ARGUMENTS
Please see ibv_query_device(3) man page for context.

  attrs_out

        struct hnsdv_context {
                uint64_t comp_mask;
                uint64_t flags;
                uint8_t congest_type;
                uint8_t reserved[7];
        };

comp_mask
    Bitmask specifying what fields in the structure are valid:

    HNSDV_CONTEXT_MASK_CONGEST_TYPE: Congestion control algorithm is supported.

congest_type
    Bitmask of supported congestion control algorithms.

    HNSDV_QP_CREATE_ENABLE_DCQCN: Data Center Quantized Congestion Notification HNSDV_QP_CREATE_ENABLE_LDCP: Low Delay Control Protocol HNSDV_QP_CREATE_ENABLE_HC3: Huawei Converged Congestion Control HNSDV_QP_CREATE_ENABLE_DIP: Destination IP based Quantized Congestion Notification

RETURN VALUE
hnsdv_query_device() returns 0 on success, or the value of errno on failure (which indicates the failure reason).

SEE ALSO
ibv_query_device(3)

NOTES

•   flags is an out field and currently has no values.

AUTHORS
Junxian Huang huangjunxian6@hisilicon.com