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

[Alex Deucher]

On Wed, Sep 10, 2014 at 12:03 AM, Michel Dänzer <michel at daenzer.net> wrote:
> 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.

Applied.  thanks!

Alex