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+.\" Licensed under the OpenIB.org BSD license (FreeBSD Variant) - See COPYING.md
+.TH "RDMA_CREATE_QP" 3 "2007-05-15" "librdmacm" "Librdmacm Programmer's Manual" librdmacm
+.SH NAME
+rdma_create_qp \- Allocate a QP.
+.SH SYNOPSIS
+.B "#include <rdma/rdma_cma.h>"
+.P
+.B "int" rdma_create_qp
+.BI "(struct rdma_cm_id *" id ","
+.BI "struct ibv_pd *" pd ","
+.BI "struct ibv_qp_init_attr *" qp_init_attr ");"
+.SH ARGUMENTS
+.IP "id" 12
+RDMA identifier.
+.IP "pd" 12
+Optional protection domain for the QP.
+.IP "qp_init_attr" 12
+Initial QP attributes.
+.SH "DESCRIPTION"
+Allocate a QP associated with the specified rdma_cm_id and transition it
+for sending and receiving.
+.SH "RETURN VALUE"
+Returns 0 on success, or -1 on error.  If an error occurs, errno will be
+set to indicate the failure reason.
+.SH "NOTES"
+The rdma_cm_id must be bound to a local RDMA device before calling this
+function, and the protection domain must be for that same device.
+QPs allocated to an rdma_cm_id are automatically transitioned by the
+librdmacm through their states.  After being allocated, the QP will be
+ready to handle posting of receives.  If the QP is unconnected, it will
+be ready to post sends.
+.P
+If a protection domain is not given - pd parameter is NULL - then
+the rdma_cm_id will be created using a default protection domain.  One
+default protection domain is allocated per RDMA device.
+.P
+The initial QP attributes are specified by the qp_init_attr parameter.  The
+send_cq and recv_cq fields in the ibv_qp_init_attr are optional.  If
+a send or receive completion queue is not specified, then a CQ will be
+allocated by the rdma_cm for the QP, along with corresponding completion
+channels.  Completion channels and CQ data created by the rdma_cm are
+exposed to the user through the rdma_cm_id structure.
+.P
+The actual capabilities and properties of the created QP will be
+returned to the user through the qp_init_attr parameter.  An rdma_cm_id
+may only be associated with a single QP.
+.SH "SEE ALSO"
+rdma_bind_addr(3), rdma_resolve_addr(3), rdma_destroy_qp(3), ibv_create_qp(3),
+ibv_modify_qp(3)