[Serious] busdma bug in -current in relation to USB hardware -
marius at alchemy.franken.de
Sun Dec 7 16:19:50 UTC 2008
On Sat, Dec 06, 2008 at 01:34:54PM +0100, Hans Petter Selasky wrote:
> After various feedback from several people I have made a new patch proposal
> that will fix the busdma problem.
> Review wanted!
> I don't know how to patch the psyco interface for SUN. Maybe there is nothing
> that needs to be patched?
Neither sparc64 nor sun4u has support for bounce buffers; it's
not really worth the effort to implement IOMMU-bypass and bounce
buffers for the few devices only doing < 32-bit DMA and for
>= 32-bit DMA the IOMMU takes care of the address translation
for all practical purposes. In any case this isn't specific to
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