1IBV_CREATE_CQ(3) Libibverbs Programmer's Manual IBV_CREATE_CQ(3)
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6 ibv_create_cq, ibv_destroy_cq - create or destroy a completion queue
7 (CQ)
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10 #include <infiniband/verbs.h>
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12 struct ibv_cq *ibv_create_cq(struct ibv_context *context, int cqe,
13 void *cq_context,
14 struct ibv_comp_channel *channel,
15 int comp_vector);
16 int ibv_destroy_cq(struct ibv_cq *cq);
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19 ibv_create_cq() creates a completion queue (CQ) with at least cqe
20 entries for the InfiniBand device context context. The pointer cq_con‐
21 text will be used to set user context pointer of the CQ structure. The
22 argument channel is optional; if not NULL, the completion channel chan‐
23 nel will be used to return completion events. The CQ will use the com‐
24 pletion vector comp_vector for signaling completion events; it must be
25 at least zero and less than context->num_comp_vectors.
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27 ibv_destroy_cq() destroys the CQ cq.
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30 ibv_create_cq() returns a pointer to the CQ, or NULL if the request
31 fails.
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33 ibv_destroy_cq() returns 0 on success, or the value of errno on failure
34 (which indicates the failure reason).
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37 ibv_create_cq() may create a CQ with size greater than or equal to the
38 requested size. Check the cqe attribute in the returned CQ for the
39 actual size.
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41 ibv_destroy_cq() fails if any queue pair is still associated with this
42 CQ.
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45 ibv_resize_cq(3), ibv_req_notify_cq(3), ibv_create_qp(3)
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48 Dotan Barak <dotanb@mellanox.co.il>
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52libibverbs 2006-10-31 IBV_CREATE_CQ(3)