[PATCH v2 13/15] drm/ttm: Add BO and offset arguments for vm_access and vm_fault ttm handlers.

[Thomas Hellström]

On 5/18/21 5:07 PM, Christian König wrote:
> Am 18.05.21 um 16:55 schrieb Thomas Hellström:
>> From: Maarten Lankhorst <maarten.lankhorst at linux.intel.com>
>>
>> This allows other drivers that may not setup the vma in the same way
>> to use the ttm bo helpers.
>
> Uff can you please explain why exactly you need that?
>
> Providing the BO is not much of a problem, but having the BO at 
> different VMA offsets is really a no-go with TTM.
>
> Christian.

The current i915 uapi is using different offsets for different caching 
:/. We're currently working around that by using ttm_bo_type_kernel (no 
TTM vma offset at all) and i915's offset.

/Thomas