RFC: Radeon multi ring support branch

Jerome Glisse j.glisse at gmail.com
Mon Oct 31 08:05:38 PDT 2011

On Sat, Oct 29, 2011 at 03:00:28PM +0200, Christian König wrote:
> Hello everybody,
> to support multiple compute rings, async DMA engines and UVD we need
> to teach the radeon kernel module how to sync buffers between
> different rings and make some changes to the command submission
> ioctls.
> Since we can't release any documentation about async DMA or UVD
> (yet), my current branch concentrates on getting the additional
> compute rings on cayman running. Unfortunately those rings have
> hardware bugs that can't be worked around, so they are actually not
> very useful in a production environment, but they should do quite
> well for this testing purpose.
> The branch can be found here:
> http://cgit.freedesktop.org/~deathsimple/linux/log/
> Since some of the patches are quite intrusive, constantly rebaseing
> them could get a bit painful. So I would like to see most of the
> stuff included into drm-next, even if we don't make use of the new
> functionality right now.
> Comments welcome,
> Christian.

So for all patches except the interface change see below
Reviewed-by: Jerome Glisse <jglisse at redhat.com>

For the interface change, as discussed previously, i believe prio
should be a userspace argument, kernel could override it.


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