[PATCH] drm/amdgpu: reserve GDS resources statically

[Marek Olšák]

To be fair, since we have only 7 user VMIDs and 8 chunks of GDS, we
can make the 8th GDS chunk global and allocatable and use it based on
a CS flag. It would need more work and a lot of testing though. I
don't think we can do the testing part now because of the complexity
of interactions between per-VMID GDS and global GDS, but it's
certainly something that people could add in the future.

Marek

On Thu, Sep 13, 2018 at 3:04 PM, Marek Olšák <maraeo at gmail.com> wrote:
> I was thinking about that too, but it would be too much trouble for
> something we don't need.
>
> Marek
>
> On Thu, Sep 13, 2018 at 2:57 PM, Deucher, Alexander
> <Alexander.Deucher at amd.com> wrote:
>> Why don't we just fix up the current GDS code so it works the same as vram
>> and then we can add a new CS or context flag to ignore the current static
>> allocation for gfx.  We can ignore data persistence if it's too much
>> trouble.  Assume you always have to init the memory before you use it.
>> That's already the case.
>>
>>
>> Alex