PAGES_PER_SGE
max_sge = ((max_sge + PAGES_PER_SGE - 1) &
(~(PAGES_PER_SGE - 1))) >> PAGES_PER_SGE_SHIFT;
if (pages > 8 * PAGES_PER_SGE) {
for (i = 0, j = 0; i < pages; i += PAGES_PER_SGE, j++) {
for (i = 0, j = 0; i < frags; i += PAGES_PER_SGE, j++) {
#define SGE_PAGES (SGE_PAGE_SIZE * PAGES_PER_SGE)