RFC: Radeon multi ring support branch

[Jerome Glisse]

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.

Cheers,
Jerome