EFADV_CREATE_QP_EX(3)

NAME
efadv_create_qp_ex - Create EFA specific extended Queue Pair

SYNOPSIS

        #include <infiniband/efadv.h>
        struct ibv_qp *efadv_create_qp_ex(struct ibv_context *ibvctx,
                          struct ibv_qp_init_attr_ex *attr_ex,
                          struct efadv_qp_init_attr *efa_attr,
                          uint32_t inlen);

DESCRIPTION
efadv_create_qp_ex() creates device-specific extended Queue Pair.

The argument attr_ex is an ibv_qp_init_attr_ex struct, as defined in <infiniband/verbs.h>.

Use ibv_qp_to_qp_ex() to get the ibv_qp_ex for accessing the send ops iterator interface, when QP create attr IBV_QP_INIT_ATTR_SEND_OPS_FLAGS is used.

Scalable Reliable Datagram (SRD) transport provides reliable out-of-order delivery, transparently utilizing multiple network paths to reduce network tail latency. Its interface is similar to UD, in particular it supports message size up to MTU, with error handling extended to support reliable communication.

Compatibility is handled using the comp_mask and inlen fields.

        struct efadv_qp_init_attr {
            uint64_t comp_mask;
            uint32_t driver_qp_type;
            uint16_t flags;
            uint8_t sl;
            uint8_t reserved[1];
        };

inlen
    In: Size of struct efadv_qp_init_attr.

comp_mask
    Compatibility mask.

driver_qp_type
    The type of QP to be created:

    EFADV_QP_DRIVER_TYPE_SRD: Create an SRD QP.

flags

        A bitwise OR of the values described below.

    EFADV_QP_FLAGS_UNSOLICITED_WRITE_RECV: Receive WRs will not be consumed for RDMA write with imm.

    EFADV_QP_FLAGS_INLINE_WRITE: QP supports RDMA write with inline operations.

sl  Service Level - 0 value implies default level.

RETURN VALUE
efadv_create_qp_ex() returns a pointer to the created QP, or NULL if the request fails.

SEE ALSO
efadv(7), ibv_create_qp_ex(3)

AUTHORS
Gal Pressman galpress@amazon.com Daniel Kranzdorf dkkranzd@amazon.com