TXP_OFFSET2IDX
TXP_OFFSET2IDX(letoh32(*(sc->sc_txhir.r_off)))))
TXP_OFFSET2IDX(letoh32(*(sc->sc_txlor.r_off)))))
end = TXP_OFFSET2IDX(letoh32(hv->hv_rx_buf_read_idx));
i = TXP_OFFSET2IDX(letoh32(hv->hv_rx_buf_write_idx));
u_int32_t idx = TXP_OFFSET2IDX(letoh32(*(r->r_off)));