rdma_cqe
#define QLNXR_CQE_SIZE (sizeof(union rdma_cqe))
union rdma_cqe *latest_cqe;
union rdma_cqe *toggle_cqe;
is_valid_cqe(struct qlnxr_cq *cq, union rdma_cqe *cqe)
union rdma_cqe *cqe = cq->latest_cqe;