efadv_query_cq3
Query efa specific completion queue attributes
Usage
-
#include <infiniband/efadv.h> int efadv_query_cq(struct ibv_cq *ibvcq, struct efadv_cq_attr *attr, uint32_t inlen);
Overview
efadv_query_cq() queries device-specific Completion Queue attributes.
Compatibility is handled using the comp_mask and inlen fields.
-
struct efadv_cq_attr { uint64_t comp_mask; uint8_t *buffer; uint32_t entry_size; uint32_t num_entries; uint32_t *doorbell; };
- inlen
-
In: Size of struct efadv_cq_attr.
- comp_mask
-
Compatibility mask.
- buffer
-
Completion queue buffer.
- entry_size
-
Size of each completion queue entry.
- num_entries
-
Maximal number of entries in the completion queue.
- doorbell
-
Reverse doorbell used to update the device of polled entries and to request notifications. NULL when not in use for this Completion Queue.
Return value
efadv_query_cq() returns 0 on success, or the value of errno on failure (which indicates the failure reason).
Notes
- •
-
Compatibility mask (comp_mask) is an out field and currently has no values.