HNSDV_CREATE_QP(3)

NAME
hnsdv_create_qp - creates a HNS specific queue pair (QP)

SYNOPSIS

        #include <infiniband/hnsdv.h>
        struct ibv_qp *hnsdv_create_qp(struct ibv_context *context,
                                       struct ibv_qp_init_attr_ex *qp_attr,
                                       struct hnsdv_qp_init_attr *hns_attr);

DESCRIPTION
hnsdv_create_qp() creates a HNS specific queue pair (QP) with specific driver properties.

ARGUMENTS
Please see ibv_create_qp_ex(3) man page for context and qp_attr.

  hns_attr

        struct hnsdv_qp_init_attr {
                uint64_t comp_mask;
                uint32_t create_flags;
                uint8_t congest_type;
                uint8_t reserved[3];
        };

comp_mask
    Bitmask specifying what fields in the structure are valid:

        HNSDV_QP_INIT_ATTR_MASK_QP_CONGEST_TYPE:
            Valid values in congest_type. Allow setting a congestion control algorithm for QP.

create_flags
    Enable the QP of a feature.

congest_type
    Type of congestion control algorithm:

    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_create_qp() returns a pointer to the created QP, on error NULL will be returned and errno will be set.

SEE ALSO
ibv_create_qp_ex(3)

AUTHOR
Junxian Huang huangjunxian6@hisilicon.com