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CentOS 7.0 - man page for ibv_create_srq_ex (centos section 3)

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

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

SYNOPSIS
       #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
       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
       <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 */
	       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_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 */
       };

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

SEE ALSO
       ibv_alloc_pd(3), ibv_modify_srq(3), ibv_query_srq(3)

AUTHORS
       Yishai Hadas <yishaih@mellanox.com>

libibverbs				    2013-06-26			     IBV_CREATE_SRQ_EX(3)


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