BUFMGR_MODE
tw32(BUFMGR_MODE, val);
if (tr32(BUFMGR_MODE) & BUFMGR_MODE_ENABLE)
tw32(BUFMGR_MODE, 0);
tg3_rd32_loop(tp, regs, BUFMGR_MODE, 0x58);
case BUFMGR_MODE:
err |= tg3_stop_block(tp, BUFMGR_MODE, BUFMGR_MODE_ENABLE, silent);