ADSTAT_OWN
__rxd->ad_status = ADSTAT_OWN|ADSTAT_Rx_FS|ADSTAT_Rx_LS; \
if (rxstat & ADSTAT_OWN) {
if (txstat & ADSTAT_OWN)
(nexttx == firsttx) ? 0 : ADSTAT_OWN;
sc->sc_txdescs[firsttx].ad_status |= ADSTAT_OWN;