NAME

       ibv_create_cq, ibv_destroy_cq - create or destroy a completion queue (CQ)

SYNOPSIS

       #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);

DESCRIPTION

       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.

RETURN VALUE

       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).

NOTES

       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.

SEE ALSO

       ibv_resize_cq(3), ibv_req_notify_cq(3), ibv_ack_cq_events(3), ibv_create_qp(3)

AUTHORS

       Dotan Barak <dotanba@gmail.com>