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 / tag matching */
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_tm_cap tm_cap; /* Tag matching attributes */
};
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 */
};
struct ibv_tm_cap {
uint32_t max_num_tags; /* Tag matching list size */
uint32_t max_ops; /* Number of outstanding tag list operations */
};
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
Referenced By
ibv_get_srq_num(3), ibv_open_xrcd(3), ibv_post_srq_ops(3).