1IBV_CREATE_SRQ_EX(3)    Libibverbs Programmer's Manual    IBV_CREATE_SRQ_EX(3)
2
3
4

NAME

6       ibv_create_srq_ex, ibv_destroy_srq - create or destroy a shared receive
7       queue (SRQ)
8

SYNOPSIS

10       #include <infiniband/verbs.h>
11
12       struct ibv_srq *ibv_create_srq_ex(struct ibv_context *context, struct
13                                      ibv_srq_init_attr_ex *srq_init_attr_ex);
14
15       int ibv_destroy_srq(struct ibv_srq *srq);
16

DESCRIPTION

18       ibv_create_srq_ex() creates a shared  receive  queue  (SRQ)  supporting
19       both  basic  and  xrc  modes.   The  argument  srq_init_attr_ex  is  an
20       ibv_srq_init_attr_ex struct, as defined in <infiniband/verbs.h>.
21
22       struct ibv_srq_init_attr_ex {
23               void                   *srq_context;    /* Associated context of the SRQ */
24               struct ibv_srq_attr     attr;           /* SRQ attributes */
25               uint32_t                comp_mask;      /* Identifies valid fields */
26               enum ibv_srq_type       srq_type;       /* Basic / XRC / tag matching */
27               struct ibv_pd          *pd;             /* PD associated with the SRQ */
28               struct ibv_xrcd        *xrcd;           /* XRC domain to associate with the SRQ */
29               struct ibv_cq          *cq;             /* CQ to associate with the SRQ for XRC mode */
30               struct ibv_tm_cap       tm_cap;         /* Tag matching attributes */
31       };
32
33       struct ibv_srq_attr {
34               uint32_t                max_wr;         /* Requested max number of outstanding work requests (WRs) in the SRQ */
35               uint32_t                max_sge;        /* Requested max number of scatter elements per WR */
36               uint32_t                srq_limit;      /* The limit value of the SRQ */
37       };
38
39       struct ibv_tm_cap {
40               uint32_t                max_num_tags;   /* Tag matching list size */
41               uint32_t                max_ops;        /* Number of outstanding tag list operations */
42       };
43
44
45       The  function  ibv_create_srq_ex()  will  update  the  srq_init_attr_ex
46       struct with the original values of the SRQ that was created; the values
47       of max_wr and max_sge will be greater  than  or  equal  to  the  values
48       requested.
49
50       ibv_destroy_srq() destroys the SRQ srq.
51

RETURN VALUE

53       ibv_create_srq_ex()  returns  a  pointer to the created SRQ, or NULL if
54       the request fails.
55
56       ibv_destroy_srq() returns 0 on success, or the value of errno on  fail‐
57       ure (which indicates the failure reason).
58

NOTES

60       ibv_destroy_srq() fails if any queue pair is still associated with this
61       SRQ.
62

SEE ALSO

64       ibv_alloc_pd(3), ibv_modify_srq(3), ibv_query_srq(3)
65

AUTHORS

67       Yishai Hadas <yishaih@mellanox.com>
68
69
70
71libibverbs                        2013-06-26              IBV_CREATE_SRQ_EX(3)