[PATCH] drm/radeon: remove visible vram size limit on bo allocation

[Alex Deucher]

On Thu, Jul 17, 2014 at 8:41 PM, Michel Dänzer <michel at daenzer.net> wrote:
> On 18.07.2014 01:29, Alex Deucher wrote:
>> @@ -55,10 +55,13 @@ int radeon_gem_object_create(struct radeon_device *rdev, int size,
>>               alignment = PAGE_SIZE;
>>       }
>>
>> -     /* maximun bo size is the minimun btw visible vram and gtt size */
>> -     max_size = min(rdev->mc.visible_vram_size, rdev->mc.gtt_size);
>> +     /* Maximum bo size is the gtt size since we use the gtt to handle
>> +      * vram to system pool migrations.  We could probably remove this
>> +      * check altogether with a little additional work.
>> +      */
>
> This comment needs updating: it's not the full GTT size anymore, and how
> could we remove this check?

I'll update it.  We could remove it if we added support for breaking
down vram <-> system transfers into smaller operations.  E.g., if the
available vram size was twice the size of the available gtt space, we
could transfer the first half, then update the gart table and transfer
the second half.

>
>
>> @@ -331,6 +335,12 @@ int radeon_bo_unpin(struct radeon_bo *bo)
>>       for (i = 0; i < bo->placement.num_placement; i++)
>>               bo->placements[i] &= ~TTM_PL_FLAG_NO_EVICT;
>>       r = ttm_bo_validate(&bo->tbo, &bo->placement, false, false);
>> +     if (likely(r == 0)) {
>> +             if (bo->tbo.mem.mem_type == TTM_PL_VRAM)
>> +                     bo->rdev->vram_pin_size -= radeon_bo_size(bo);
>> +             else
>> +                     bo->rdev->gart_pin_size -= radeon_bo_size(bo);
>> +     }
>>       if (unlikely(r != 0))
>>               dev_err(bo->rdev->dev, "%p validate failed for unpin\n", bo);
>
> Might be better to convert the failure case to use else, no big deal though.

I can fix that.

>
>
> Other than that, the patches look good to me as well.
>

Thanks!

Alex

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