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NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | NOTES | SEE ALSO | AUTHORS | COLOPHON |
IBV_CREATE_CQ(3) Libibverbs Programmer's Manual IBV_CREATE_CQ(3)
ibv_create_cq, ibv_destroy_cq - create or destroy a completion queue
(CQ)
#include <infiniband/verbs.h>
struct ibv_cq *ibv_create_cq(struct ibv_context *context, int cqe,
void *cq_context,
struct ibv_comp_channel *channel,
int comp_vector);
int ibv_destroy_cq(struct ibv_cq *cq);
ibv_create_cq() creates a completion queue (CQ) with at least cqe
entries for the RDMA device context context. The pointer cq_context
will be used to set user context pointer of the CQ structure. The
argument channel is optional; if not NULL, the completion channel
channel will be used to return completion events. The CQ will use
the completion vector comp_vector for signaling completion events; it
must be at least zero and less than context->num_comp_vectors.
ibv_destroy_cq() destroys the CQ cq.
ibv_create_cq() returns a pointer to the CQ, or NULL if the request
fails.
ibv_destroy_cq() returns 0 on success, or the value of errno on
failure (which indicates the failure reason).
ibv_create_cq() may create a CQ with size greater than or equal to
the requested size. Check the cqe attribute in the returned CQ for
the actual size.
ibv_destroy_cq() fails if any queue pair is still associated with
this CQ.
ibv_resize_cq(3), ibv_req_notify_cq(3), ibv_ack_cq_events(3),
ibv_create_qp(3)
Dotan Barak <dotanba@gmail.com>
This page is part of the rdma-core (RDMA Core Userspace Libraries and
Daemons) project. Information about the project can be found at
⟨https://github.com/linux-rdma/rdma-core⟩. If you have a bug report
for this manual page, send it to linux-rdma@vger.kernel.org. This
page was obtained from the project's upstream Git repository
⟨https://github.com/linux-rdma/rdma-core.git⟩ on 2020-08-13. (At
that time, the date of the most recent commit that was found in the
repository was 2020-08-05.) If you discover any rendering problems
in this HTML version of the page, or you believe there is a better or
more up-to-date source for the page, or you have corrections or
improvements to the information in this COLOPHON (which is not part
of the original manual page), send a mail to man-pages@man7.org
libibverbs 2006-10-31 IBV_CREATE_CQ(3)
Pages that refer to this page: ibv_ack_cq_events(3) , ibv_create_comp_channel(3) , ibv_create_cq_ex(3) , ibv_destroy_comp_channel(3) , ibv_get_cq_event(3) , ibv_modify_cq(3)