RX_SGE_USABLE_PER_PAGE
(RX_SGE_USABLE_PER_PAGE * RX_SGE_NUM_PAGES)) {
#define RX_SGE_USABLE (RX_SGE_USABLE_PER_PAGE * RX_SGE_NUM_PAGES)
((((x) & RX_SGE_PER_PAGE_MASK) == (RX_SGE_USABLE_PER_PAGE - 1)) \
((NUM_SGE_REQ(sc) + RX_SGE_USABLE_PER_PAGE - 1) / RX_SGE_USABLE_PER_PAGE)