ti_stats
TI_RING_DMA_ADDR(sc, ti_info.ti_stats);
struct ti_stats *stats = &sc->ti_rdata->ti_info.ti_stats;
TI_RING_DMASYNC(sc, ti_info.ti_stats, BUS_DMASYNC_POSTREAD);
TI_RING_DMASYNC(sc, ti_info.ti_stats, BUS_DMASYNC_PREREAD);
struct ti_stats ti_stats;