PCI Radeon 9250 - DRI/DRM in 8.0-RELEASE

[Steve Polyack]

On 12/19/2009 1:09 PM, Robert Noland wrote:
> On Sat, 2009-12-12 at 17:36 -0500, Greg Rowe wrote:
>    
>> The system is still running the pagezero patch if that makes any difference?
>>      
> Ok, you can get rid of that.
>
> I wasn't able to fix this quite like I wanted to, but this should work.
> The fix that I was intending to do, ended up meaning that I had to work
> on our mmap implementation, which I did, but won't be committed until it
> is reviewed. It also required a handful of changes to userland (libdrm,
> and the DDX driver) and broke the KBI so rebuilding even more stuff was
> needed.  The linux guys would not have been happy with me and I would
> have had a fight on my hands.
>
> This patch implements what I wanted to do on 64 bit platforms.  On 32
> bit platforms (i386) it comes with some consequences... On amd64, I've
> adapted the map handle to have an offset of 0 and a globally unique map
> number starting at bit 40.  This means that there are 24 bits for maps
> and each map can describe 1TB of memory.  On i386, I've done the same
> thing except I am only stealing the top 4 bits for the map id, so there
> can only be 15 maps each up to 256MB.  This should be ok since normally
> there are only 6 or 7 maps.
>
> I have run tested this on r600 amd64 so far.  I can test r3/5/6/700,
> Intel and nouveau, but haven't done so yet.  This should be a kernel
> only fix, meaning you should not need to patch or rebuild any of your
> userland apps.  The patch is applicable to -CURRENT, and should work on
> 8-STABLE and possibly 7-STABLE.
>
> http://people.freebsd.org/~rnoland/drm_mmap_fix.patch
>
> robert.
>    
I'm syncing up to 8-STABLE now and doing the builds, but I won't have 
any results back to you until Monday.  I'll let you know if it fixes my 
issue.

Thanks again,
Steve