Provided by: libibverbs-dev_28.0-1ubuntu1_amd64
NAME
mlx5dv_create_qp - creates a queue pair (QP)
SYNOPSIS
#include <infiniband/mlx5dv.h> struct ibv_qp *mlx5dv_create_qp(struct ibv_context *context, struct ibv_qp_init_attr_ex *qp_attr, struct mlx5dv_qp_init_attr *mlx5_qp_attr)
DESCRIPTION
mlx5dv_create_qp() creates a queue pair (QP) with specific driver properties.
ARGUMENTS
Please see ibv_create_qp_ex(3) man page for context and qp_attr. mlx5_qp_attr struct mlx5dv_qp_init_attr { uint64_t comp_mask; uint32_t create_flags; struct mlx5dv_dc_init_attr dc_init_attr; uint64_t send_ops_flags; }; comp_mask Bitmask specifying what fields in the structure are valid: MLX5DV_QP_INIT_ATTR_MASK_QP_CREATE_FLAGS: valid values in create_flags MLX5DV_QP_INIT_ATTR_MASK_DC: valid values in dc_init_attr MLX5DV_QP_INIT_ATTR_MASK_SEND_OPS_FLAGS: valid values in send_ops_flags create_flags A bitwise OR of the various values described below. MLX5DV_QP_CREATE_TUNNEL_OFFLOADS: Enable offloading such as checksum and LRO for incoming tunneling traffic. MLX5DV_QP_CREATE_TIR_ALLOW_SELF_LOOPBACK_UC: Allow receiving loopback unicast traffic. MLX5DV_QP_CREATE_TIR_ALLOW_SELF_LOOPBACK_MC: Allow receiving loopback multicast traffic. MLX5DV_QP_CREATE_DISABLE_SCATTER_TO_CQE: Disable scatter to CQE feature which is enabled by default. MLX5DV_QP_CREATE_ALLOW_SCATTER_TO_CQE: Allow scatter to CQE for requester even if the qp was not configured to signal all WRs. MLX5DV_QP_CREATE_PACKET_BASED_CREDIT_MODE: Set QP to work in end-to-end packet-based credit, instead of the default message-based credits (IB spec. section 9.7.7.2). It is the applications responsibility to make sure that the peer QP is configured with same mode. dc_init_attr DC init attributes. dc_init_attr struct mlx5dv_dc_init_attr { enum mlx5dv_dc_type dc_type; uint64_t dct_access_key; }; dc_type MLX5DV_DCTYPE_DCT QP type: Target DC. MLX5DV_DCTYPE_DCI QP type: Initiator DC. dct_access_key used to create a DCT QP. send_ops_flags A bitwise OR of the various values described below. MLX5DV_QP_EX_WITH_MR_INTERLEAVED: Enables the mlx5dv_wr_mr_interleaved() work requset on this QP. MLX5DV_QP_EX_WITH_MR_LIST: Enables the mlx5dv_wr_mr_list() work requset on this QP.
NOTES
mlx5dv_qp_ex_from_ibv_qp_ex() is used to get struct mlx5dv_qp_ex for accessing the send ops interfaces when IBV_QP_INIT_ATTR_SEND_OPS_FLAGS is used.
RETURN VALUE
mlx5dv_create_qp() returns a pointer to the created QP, on error NULL will be returned and errno will be set.
SEE ALSO
ibv_query_device_ex(3), ibv_create_qp_ex(3),
AUTHOR
Yonatan Cohen <yonatanc@mellanox.com>