[PATCH 1/2] dmr/amdgpu: Avoid HW GPU reset for RAS.

[Grodzovsky, Andrey]

On 8/29/19 12:18 PM, Kuehling, Felix wrote:
> On 2019-08-29 10:08 a.m., Grodzovsky, Andrey wrote:
>> Agree, the placement of amdgpu_amdkfd_pre/post _reset in
>> amdgpu_device_lock/unlock_adev is a bit wierd.
>>
> amdgpu_device_reset_sriov already calls amdgpu_amdkfd_pre/post_reset
> itself while it has exclusive access to the GPU.

So in that case amdgpu_amdkfd_pre/post_reset gets called twice - once 
from amdgpu_device_lock/unlock_adev and second time from 
amdgpu_device_reset_sriov, no ? Why is it ?


> It would make sense to
> move the same calls into amdgpu_do_asic_reset for the bare-metal case.


Problem is i am skipping amdgpu_do_asic_reset totally in this case as 
there is no HW reset here so i will just extract it from 
amdgpu_device_lock/unlock_adev

Andrey


>
> Regards,
>     Felix
>
>
>> Andrey
>>
>> On 8/29/19 10:06 AM, Koenig, Christian wrote:
>>>> Felix advised that the way to stop all KFD activity is simply to NOT
>>>> call amdgpu_amdkfd_post_reset so that why I added this. Do you mean you
>>>> prefer amdgpu_amdkfd_post_reset to be outside of amdgpu_device_unlock_adev ?
>>> Yes, exactly. It doesn't seems to be related to the unlock operation in
>>> the first place, but rather only signals the KFD that the reset is
>>> completed.
>>>
>>> Christian.
>>>
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