EFADV_QUERY_CQ(3)           EFA Direct Verbs Manual          EFADV_QUERY_CQ(3)

NAME
       efadv_query_cq - Query EFA specific Completion Queue attributes

SYNOPSIS
              #include <infiniband/efadv.h>

              int efadv_query_cq(struct ibv_cq *ibvcq, struct efadv_cq_attr *attr,
                                 uint32_t inlen);

DESCRIPTION
       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;
              };

       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.

RETURN VALUE
       efadv_query_cq() returns 0 on success, or the value of errno on failure
       (which indicates the failure reason).

SEE ALSO
       efadv(7)

NOTES
       o Compatibility mask (comp_mask) is an out field and currently has no
         values.

AUTHORS
       Michael Margolin <mrgolin@amazon.com>

efa                               2025-04-15                 EFADV_QUERY_CQ(3)