NAME

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

SYNOPSIS

       #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

       ibv_create_wq()  creates  a  WQ  associated  with  the  ibv_context context.  The argument
       wq_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    function    ibv_create_wq()    will    update    the    wq_init_attr->max_wr    and
       wq_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 WQ wq.

RETURN VALUE

       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

       ibv_modify_wq(3),

AUTHORS

       Yishai Hadas <yishaih@mellanox.com>