IE_CMD_NOP_LINK
sc->ie_bus_write16(sc, IE_CMD_NOP_LINK(sc->nop_cmds, cur),
sc->ie_bus_write16(sc, IE_CMD_NOP_LINK(sc->nop_cmds, prev),
sc->ie_bus_write16(sc, IE_CMD_NOP_LINK(sc->nop_cmds, n),