IRDMA_RING_USED_QUANTA
if ((IRDMA_RING_USED_QUANTA(_ring) + (_count)) < size) { \
(IRDMA_RING_USED_QUANTA(_ring) == (IRDMA_RING_SIZE(_ring) - 1)) \
(IRDMA_RING_USED_QUANTA(_ring) == (IRDMA_RING_SIZE(_ring) - 257)) \
(IRDMA_RING_USED_QUANTA(_ring) != 0) \
(IRDMA_RING_SIZE(_ring) - IRDMA_RING_USED_QUANTA(_ring) - 1) \
(IRDMA_RING_SIZE(_ring) - IRDMA_RING_USED_QUANTA(_ring) - 257) \
pending_work = IRDMA_RING_USED_QUANTA(cqp->sc_cqp.sq_ring);