MAX_SPQ_PENDING
#define FW_DROP_LEVEL(bp) (3 + MAX_SPQ_PENDING + MAX_AGG_QS(bp))
atomic_set(&bp->cq_spq_left, MAX_SPQ_PENDING);
min_t(int, MAX_SP_DESC_CNT - MAX_SPQ_PENDING, NUM_EQ_DESC) - 1);