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ibv_create_wq(3) — Linux manual page

IBV_CREATE_WQ(3)      Libibverbs Programmer's ManualIBV_CREATE_WQ(3)

NAME        top

       ibv_create_wq, ibv_destroy_wq - create or destroy a Work Queue       (WQ).

SYNOPSIS        top

#include <infiniband/verbs.h>struct ibv_wq *ibv_create_wq(struct ibv_context*context,struct ibv_wq_init_attr*wq_init_attr);int ibv_destroy_wq(struct ibv_wq*wq);

DESCRIPTION        top

ibv_create_wq()creates a WQ associated with the ibv_contextcontext.  The argumentwq_init_attr is an ibv_wq_init_attr struct,       as defined in <infiniband/verbs.h>.       struct ibv_wq_init_attr {               void                      *wq_context;    /* Associated context of the WQ */               enum ibv_wq_type           wq_type;       /* WQ type */               uint32_t                   max_wr;        /* Requested max number of outstanding WRs in the WQ */               uint32_t                   max_sge;       /* Requested max number of scatter/gather (s/g) elements per WR in the WQ */               struct  ibv_pd            *pd;            /* PD to be associated with the WQ */               struct  ibv_cq            *cq;            /* CQ to be associated with the WQ */               uint32_t                   comp_mask;     /* Identifies valid fields. Use ibv_wq_init_attr_mask */               uint32_t                   create_flags    /* Creation flags for this WQ, use enum ibv_wq_flags */       };       enum ibv_wq_flags {               IBV_WQ_FLAGS_CVLAN_STRIPPING            = 1 << 0, /* CVLAN field will be stripped from incoming packets */               IBV_WQ_FLAGS_SCATTER_FCS                = 1 << 1, /* FCS field will be scattered to host memory */               IBV_WQ_FLAGS_DELAY_DROP                 = 1 << 2, /* Packets won't be dropped immediately if no receive WQEs */               IBV_WQ_FLAGS_PCI_WRITE_END_PADDING      = 1 << 3, /* Incoming packets will be padded to cacheline size */               IBV_WQ_FLAGS_RESERVED                   = 1 << 4,       };       The functionibv_create_wq()will update thewq_init_attr->max_wr       andwq_init_attr->max_sge fields with the actual WQ values of the       WQ that was created; the values will be greater than or equal to       the values requested.ibv_destroy_wq()destroys the WQwq.

RETURN VALUE        top

ibv_create_wq()returns a pointer to the created WQ, or NULL if       the request fails.ibv_destroy_wq()returns 0 on success, or the value of errno on       failure (which indicates the failure reason).

SEE ALSO        top

ibv_modify_wq(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                      2016-07-27IBV_CREATE_WQ(3)

Pages that refer to this page:ibv_create_rwq_ind_table(3), ibv_modify_wq(3)

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