F_GLOBALENABLE
t3_set_reg_field(sc, A_SG_CONTROL, F_GLOBALENABLE, F_GLOBALENABLE);
t3_set_reg_field(sc, A_SG_CONTROL, F_GLOBALENABLE, 0);
t4_set_reg_field(adapter, A_SGE_CONTROL, F_GLOBALENABLE, 0);