efadv_create_qp_ex - Man Page

#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);

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 reserved[2];
};

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

efadv(7), ibv_create_qp_ex(3)

Gal Pressman galpress@amazon.com\c Daniel Kranzdorf dkkranzd@amazon.com\c