ibv_create_srq_ex(3) — Linux manual page


IBV_CREATE_SRQ_EX(3) Libibverbs Programmer's Manual IBV_CREATE_SRQ_EX(3)

NAME         top

       ibv_create_srq_ex, ibv_destroy_srq - create or destroy a shared
       receive queue (SRQ)

SYNOPSIS         top

       #include <infiniband/verbs.h>

       struct ibv_srq *ibv_create_srq_ex(struct ibv_context *context, struct
                                      ibv_srq_init_attr_ex *srq_init_attr_ex);

       int ibv_destroy_srq(struct ibv_srq *srq);

DESCRIPTION         top

       ibv_create_srq_ex() creates a shared receive queue (SRQ)
       supporting both basic and xrc modes.  The argument
       srq_init_attr_ex is an ibv_srq_init_attr_ex struct, as defined in

       struct ibv_srq_init_attr_ex {
               void                   *srq_context;    /* Associated context of the SRQ */
               struct ibv_srq_attr     attr;           /* SRQ attributes */
               uint32_t                comp_mask;      /* Identifies valid fields */
               enum ibv_srq_type       srq_type;       /* Basic / XRC / tag matching */
               struct ibv_pd          *pd;             /* PD associated with the SRQ */
               struct ibv_xrcd        *xrcd;           /* XRC domain to associate with the SRQ */
               struct ibv_cq          *cq;             /* CQ to associate with the SRQ for XRC mode */
               struct ibv_tm_cap       tm_cap;         /* Tag matching attributes */

       struct ibv_srq_attr {
               uint32_t                max_wr;         /* Requested max number of outstanding work requests (WRs) in the SRQ */
               uint32_t                max_sge;        /* Requested max number of scatter elements per WR */
               uint32_t                srq_limit;      /* The limit value of the SRQ */

       struct ibv_tm_cap {
               uint32_t                max_num_tags;   /* Tag matching list size */
               uint32_t                max_ops;        /* Number of outstanding tag list operations */

       The function ibv_create_srq_ex() will update the srq_init_attr_ex
       struct with the original values of the SRQ that was created; the
       values of max_wr and max_sge will be greater than or equal to the
       values requested.

       ibv_destroy_srq() destroys the SRQ srq.

RETURN VALUE         top

       ibv_create_srq_ex() returns a pointer to the created SRQ, or NULL
       if the request fails.

       ibv_destroy_srq() returns 0 on success, or the value of errno on
       failure (which indicates the failure reason).

NOTES         top

       ibv_destroy_srq() fails if any queue pair is still associated
       with this SRQ.

SEE ALSO         top

       ibv_alloc_pd(3), ibv_modify_srq(3), ibv_query_srq(3)

AUTHORS         top

       Yishai Hadas <yishaih@mellanox.com>

COLOPHON         top

       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 2023-12-22.  (At
       that time, the date of the most recent commit that was found in
       the repository was 2023-12-20.)  If you discover any rendering
       problems in this HTML version of the page, or you believe there
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       (which is not part of the original manual page), send a mail to

libibverbs                     2013-06-26           IBV_CREATE_SRQ_EX(3)

Pages that refer to this page: ibv_open_xrcd(3)ibv_post_srq_ops(3)