viommu_dvmamap_append_range
err = viommu_dvmamap_append_range(t, map, pgstart,
err = viommu_dvmamap_append_range(t, map, pgstart,
err = viommu_dvmamap_append_range(t, map, pa,
int viommu_dvmamap_append_range(bus_dma_tag_t, bus_dmamap_t, paddr_t,