HVN_TXD_FLAG_DMAMAP
SET(txd->txd_flags, HVN_TXD_FLAG_DMAMAP);
KASSERTMSG(!ISSET(txd->txd_flags, HVN_TXD_FLAG_DMAMAP),
} else if (ISSET(txd->txd_flags, HVN_TXD_FLAG_DMAMAP)) {
CLR(txd->txd_flags, HVN_TXD_FLAG_DMAMAP);