On Tue, Jan 23, 2007 at 02:22:17PM +0100, Hans Petter Selasky wrote:
> iommu_dvmamap_sync_range() calls iommu_strbuf_flush()
> 
> #define iommu_strbuf_flush(i, v) do {                                   \
>         if ((i)->sb_flush)                                              \
>                 bus_space_write_8((i)->sb_is->is_bustag, (i)->sb_sb,    \
>                         STRBUFREG(strbuf_pgflush), (v));                \
>         } while (0)
> 
> 
> What I see is that "bus_dmamap_sync()" ends up calling "bus_space_write_8()" 
> to synchronize the memory.

Check the ASI used by the bus handle (from memory I guess that would 
be something like (i)->sb_sb._asi).

Martin