-*- nroff -*-
Licensed under the OpenIB.org BSD license (FreeBSD Variant) - See COPYING.md

ibv_open_qp - open a shareable queue pair (QP)

 #include <infiniband/verbs.h>  "struct ibv_qp *ibv_open_qp(struct ibv_context " "*context" ,  " struct ibv_qp_open_attr " "*qp_open_attr" ); 

ibv_open_qp() opens an existing queue pair (QP) associated with the extended protection domain xrcd. The argument qp_open_attr is an ibv_qp_open_attr struct, as defined in <infiniband/verbs.h>.

struct ibv_qp_open_attr {
uint32_t comp_mask; /* Identifies valid fields */
uint32_t qp_num; /* QP number */
struct *ibv_xrcd; /* XRC domain */
void *qp_context; /* User defined opaque value */
enum ibv_qp_type qp_type; /* QP transport service type */

ibv_destroy_qp() closes the opened QP and destroys the underlying QP if it has no other references. qp.

ibv_open_qp() returns a pointer to the opened QP, or NULL if the request fails. Check the QP number (qp_num) in the returned QP. ibv_open_qp() will fail if a it is asked to open a QP that does not exist within the xrcd with the specified qp_num and qp_type. ibv_alloc_pd (3), ibv_create_qp (3), ibv_create_qp_ex (3), ibv_modify_qp (3), ibv_query_qp (3)

Sean Hefty <sean.hefty@intel.com>