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_EN‐
              ABLE_LDCP: Low Delay Control Protocol HNSDV_QP_CREATE_ENABLE_HC3: Huawei Converged Congestion Con‐
              trol 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>

hns                                                2024-02-06                                 HNSDV_CREATE_QP(3)