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ibv_create_srq_ex(3) — Linux manual page

IBV_CREATE_SRQ_EX(3)  Libibverbs Programmer's ManualIBV_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, structibv_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 argumentsrq_init_attr_ex is an ibv_srq_init_attr_ex struct, as defined in       <infiniband/verbs.h>.       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 functionibv_create_srq_ex()will update thesrq_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 SRQsrq.

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 therdma-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 2025-08-11.  (At       that time, the date of the most recent commit that was found in       the repository was 2025-08-04.)  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 isnot part of the original manual page), send a mail to       man-pages@man7.orglibibverbs                      2013-06-26IBV_CREATE_SRQ_EX(3)

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

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