TDSTAT_OWN
if (rxstat & TDSTAT_OWN) {
if (txstat & TDSTAT_OWN)
txd->td_status = htole32(TDSTAT_OWN);
(nexttx == firsttx) ? 0 : htole32(TDSTAT_OWN);
sc->sc_txdescs[firsttx].td_status |= htole32(TDSTAT_OWN);
__rxd->td_status = htole32(TDSTAT_OWN|TDSTAT_Rx_FS|TDSTAT_Rx_LS); \