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📄 ibv_create_ah.3(1.96 KB)
📄 ibv_create_ah_from_wc.3(1.85 KB)
📄 ibv_create_comp_channel.3(1.83 KB)
📄 ibv_create_cq.3(1.79 KB)
📄 ibv_create_cq_ex.3(6.78 KB)
📄 ibv_create_flow.3(7.92 KB)
📄 ibv_create_qp.3(2.99 KB)
📄 ibv_create_qp_ex.3(4.21 KB)
📄 ibv_create_rwq_ind_table.3(2 KB)
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📄 ibv_get_async_event.3(4.65 KB)
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📄 ibv_get_device_guid.3(737 B)
📄 ibv_get_device_list.3(1.87 KB)
📄 ibv_get_device_name.3(754 B)
📄 ibv_get_srq_num.3(977 B)
📄 ibv_inc_rkey.3(864 B)
📄 ibv_modify_qp.3(7.34 KB)
📄 ibv_modify_srq.3(1.99 KB)
📄 ibv_modify_wq.3(1.31 KB)
📄 ibv_open_device.3(1.19 KB)
📄 ibv_open_qp.3(1.55 KB)
📄 ibv_open_xrcd.3(2.02 KB)
📄 ibv_poll_cq.3(3.18 KB)
📄 ibv_post_recv.3(2.47 KB)
📄 ibv_post_send.3(6.57 KB)
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📄 ibv_query_gid.3(849 B)
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📄 ibv_query_port.3(2.45 KB)
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📄 ibv_query_rt_values_ex.3(1.46 KB)
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📄 ibv_rate_to_mbps.3(1.15 KB)
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📄 ibv_reg_mr.3(2.24 KB)
📄 ibv_req_notify_cq.3(1.5 KB)
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📄 ibv_resize_cq.3(1.12 KB)
📄 ibv_srq_pingpong.1(2.21 KB)
📄 ibv_uc_pingpong.1(2.01 KB)
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📄 ibv_xsrq_pingpong.1(2.14 KB)

Editing: ibv_open_qp.3

.\" -*- nroff -*-
.\" Licensed under the OpenIB.org BSD license (FreeBSD Variant) - See COPYING.md
.\"
.TH IBV_OPEN_QP 3 2011-08-12 libibverbs "Libibverbs Programmer's Manual"
.SH "NAME"
ibv_open_qp \- open a shareable queue pair (QP)
.SH "SYNOPSIS"
.nf
.B #include <infiniband/verbs.h>
.sp
.BI "struct ibv_qp *ibv_open_qp(struct ibv_context " "*context" ,
.BI "                           struct ibv_qp_open_attr " "*qp_open_attr" );
.fi
.SH "DESCRIPTION"
.B ibv_open_qp()
opens an existing queue pair (QP) associated with the extended protection domain
.I xrcd\fR.
The argument
.I qp_open_attr
is an ibv_qp_open_attr struct, as defined in <infiniband/verbs.h>.
.PP
.nf
struct ibv_qp_open_attr {
.in +8
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 */
.fi
.PP
.B ibv_destroy_qp()
closes the opened QP and destroys the underlying QP if it has no
other references.
.I qp\fR.
.SH "RETURN VALUE"
.B ibv_open_qp()
returns a pointer to the opened QP, or NULL if the request fails.
Check the QP number (\fBqp_num\fR) in the returned QP.
.SH "NOTES"
.B 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.
.SH "SEE ALSO"
.BR ibv_alloc_pd (3),
.BR ibv_create_qp (3),
.BR ibv_create_qp_ex (3),
.BR ibv_modify_qp (3),
.BR ibv_query_qp (3)
.SH "AUTHORS"
.TP
Sean Hefty <sean.hefty@intel.com>

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