[Nouveau] [Mesa-dev] [PATCH v3 0/2] nouveau: support for custom VRAM domains

Ben Skeggs skeggsb at gmail.com
Fri Jun 19 05:38:46 PDT 2015

On 19 June 2015 at 21:51, Martin Peres <martin.peres at free.fr> wrote:
> On 19/06/2015 13:02, Alexandre Courbot wrote:
>> New revision of this patchset that prevents VRAM objects from being
>> allocated on VRAM-less systems like Tegra. This is required for Mesa
>> to work on such systems.
>> Changes since v2:
>> - Use vram_size to detect systems without VRAM and set the correct
>>    domain instead of expecting each chip to set its domain explicitly.
> This question may have been asked a ton of times, but what is the difference
> with the nvac (Ion)?
> Would the nvac have some reserved memory for its usage by the bios which
> would then be used as "VRAM"?
PFB on the dGPU IGPs has facilities to fake VRAM from an area of
"stolen" system memory reserved by the SBIOS.  GK20A/GM20B do not do
this, and require direct (or, via a mmu, whatever) access to system


> In any case, the patchseries sounds simple-enough to be maintainable.
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