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 <firstname.lastname@example.org>
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 email@example.com. This page was obtained from the project's upstream Git repository ⟨https://github.com/linux-rdma/rdma-core.git⟩ on 2022-12-17. (At that time, the date of the most recent commit that was found in the repository was 2022-12-09.) 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 firstname.lastname@example.org libibverbs 2006-10-31 IBV_CREATE_CQ(3)
Pages that refer to this page: ibv_create_comp_channel(3), ibv_create_cq_ex(3), ibv_get_cq_event(3), ibv_modify_cq(3)