ibv_open_qp(3) — Linux manual page


IBV_OPEN_QP(3)       Libibverbs Programmer's Manual       IBV_OPEN_QP(3)

NAME         top

       ibv_open_qp - open a shareable queue pair (QP)

SYNOPSIS         top

       #include <infiniband/verbs.h>

       struct ibv_qp *ibv_open_qp(struct ibv_context *context,
                                  struct ibv_qp_open_attr *qp_open_attr);

DESCRIPTION         top

       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

       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.

RETURN VALUE         top

       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.

NOTES         top

       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.

SEE ALSO         top

       ibv_alloc_pd(3), ibv_create_qp(3), ibv_create_qp_ex(3),
       ibv_modify_qp(3), ibv_query_qp(3)

AUTHORS         top

       Sean Hefty <sean.hefty@intel.com>

COLOPHON         top

       This page is part of the rdma-core (RDMA Core Userspace Libraries
       and Daemons) project.  Information about the project can be found
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       linux-rdma@vger.kernel.org.  This page was obtained from the
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       ⟨https://github.com/linux-rdma/rdma-core.git⟩ on 2023-12-22.  (At
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libibverbs                     2011-08-12                 IBV_OPEN_QP(3)