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)