[Mesa-dev] [PATCH] drm/radeon: Add RADEON_GEM_CPU_ACCESS BO creation flag

[Michel Dänzer]

On 10.09.2014 01:28, Alex Deucher wrote:
> On Mon, Sep 8, 2014 at 9:15 PM, Michel Dänzer <michel at daenzer.net> wrote:
>> On 09.09.2014 09:47, Michel Dänzer wrote:
>>> On 09.09.2014 02:36, Alex Deucher wrote:
>>>>
>>>> Updated version with comments integrated.
>>>
>>> [...]
>>>
>>>> @@ -314,10 +314,12 @@ int radeon_bo_pin_restricted(struct radeon_bo
>>>> *bo, u32 domain, u64 max_offset,
>>>>           unsigned lpfn = 0;
>>>>
>>>>           /* force to pin into visible video ram */
>>>> -        if (bo->placements[i].flags & TTM_PL_FLAG_VRAM)
>>>> -            lpfn = bo->rdev->mc.visible_vram_size >> PAGE_SHIFT;
>>>> -        else
>>>> +        if (bo->placements[i].flags & TTM_PL_FLAG_VRAM) {
>>>> +            if (!(bo->flags & RADEON_GEM_NO_CPU_ACCESS))
>>>> +                lpfn = bo->rdev->mc.visible_vram_size >> PAGE_SHIFT;
>>>> +        } else {
>>>>               lpfn = bo->rdev->mc.gtt_size >> PAGE_SHIFT; /* ??? */
>>>> +        }
>>>
>>> The else block can be removed as well, but that can be done in another
>>> patch.
>>
>> Actually, I just noticed a problem, the following if statement:
>>
>>>                if (max_offset)
>>>                        lpfn = min (lpfn, (unsigned)(max_offset >> PAGE_SHIFT));
>>
>> This will ignore max_offset if lpfn is 0. So either go with v1 of this hunk,
>> or rebase on top of the patch below.
>>
>
> Rebased on your patch and attached.

My patch didn't handle max_offset == 0 correctly. Attaching a fixed v2 
patch and your patch rebased on top of that.


-- 
Earthling Michel Dänzer            |                  http://www.amd.com
Libre software enthusiast          |                Mesa and X developer
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