Re: [PATCH 2/7] drm/amdgpu: add a new identifier for amdgpu_bo

[Nirmoy <nirmodas@amd.com>]

On 5/21/21 2:58 PM, Christian König wrote:
> Am 21.05.21 um 14:45 schrieb Nirmoy Das:
>> Add has_shadow to identify if a BO is shadowed.
>
> Ok that is not going into the right direction.


I was expecting this :) but wasn't sure how to handle it.

>
>
> Instead of identifying which BOs have a shadow we need to identify if 
> this is a VM BO or not.
>
> I think the first think you need to do is to move the shadow handling 
> from amdgpu_cs_validate() into amdgpu_vm_validate_pt_bos().
>
> And then do it only for ttm_bo_type_kernel BOs, cause those are the 
> PD/PT BOs.


Thanks, this sounds good.


Nirmoy

>
> Regards,
> Christian.
>
>>
>> Signed-off-by: Nirmoy Das <nirmoy.das@amd.com>
>> ---
>>   drivers/gpu/drm/amd/amdgpu/amdgpu_object.c | 2 ++
>>   drivers/gpu/drm/amd/amdgpu/amdgpu_object.h | 5 ++---
>>   2 files changed, 4 insertions(+), 3 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c 
>> b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
>> index 61b1edcb490a..eb3ce33cbfff 100644
>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
>> @@ -619,6 +619,7 @@ int amdgpu_bo_create(struct amdgpu_device *adev,
>>       }
>>       if (!bp->resv)
>>           amdgpu_bo_unreserve(bo);
>> +    bo->has_shadow = false;
>>       *bo_ptr = bo;
>>         trace_amdgpu_bo_create(bo);
>> @@ -657,6 +658,7 @@ int amdgpu_bo_create_shadow(struct amdgpu_device 
>> *adev,
>>       r = amdgpu_bo_create(adev, &bp, &bo->shadow);
>>       if (!r) {
>>           bo->shadow->parent = amdgpu_bo_ref(bo);
>> +        bo->has_shadow = true;
>>           mutex_lock(&adev->shadow_list_lock);
>>           list_add_tail(&bo->shadow->shadow_list, &adev->shadow_list);
>>           mutex_unlock(&adev->shadow_list_lock);
>> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h 
>> b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h
>> index a7fbf5f7051e..3a0e6ca88563 100644
>> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h
>> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.h
>> @@ -104,9 +104,8 @@ struct amdgpu_bo {
>>       struct amdgpu_vm_bo_base    *vm_bo;
>>       /* Constant after initialization */
>>       struct amdgpu_bo        *parent;
>> -    struct amdgpu_bo        *shadow;
>> -
>> -
>> +    struct amdgpu_bo                *shadow;
>> +    bool                has_shadow;
>>     #ifdef CONFIG_MMU_NOTIFIER
>>       struct mmu_interval_notifier    notifier;
>
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