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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>