gen8_set_pte
gen8_set_pte(base + offset / I915_GTT_PAGE_SIZE,
gen8_set_pte(&base[i++], pte_encode | addr);
gen8_set_pte(pte, ggtt->vm.pte_encode(addr, pat_index, flags));
gen8_set_pte(gte++, vm->scratch[0]->encode);
gen8_set_pte(gte++, pte_encode | addr);
gen8_set_pte(gte++, vm->scratch[0]->encode);
gen8_set_pte(>t_base[i], scratch_pte);