DMAR_CAP_FRO
frir = (DMAR_CAP_FRO(unit->hw_cap) + i) * 16;
DMAR_CAP_MGAW(unit->hw_cap), DMAR_CAP_FRO(unit->hw_cap),
frir = (DMAR_CAP_FRO(unit->hw_cap) + fri) * 16;
frir = (DMAR_CAP_FRO(unit->hw_cap) + i) * 16;