Re: [PATCH v3 2/7] drm/amdgpu: Cache result of last reset at reset domain level.

["Christian König" <christian.koenig@amd.com>]

Am 25.05.22 um 21:04 schrieb Andrey Grodzovsky:
> Will be read by executors of async reset like debugfs.
>
> Signed-off-by: Andrey Grodzovsky <andrey.grodzovsky@amd.com>
> ---
>   drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 6 ++++--
>   drivers/gpu/drm/amd/amdgpu/amdgpu_reset.c  | 1 +
>   drivers/gpu/drm/amd/amdgpu/amdgpu_reset.h  | 1 +
>   3 files changed, 6 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> index 4daa0e893965..bfdd8883089a 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> @@ -5307,6 +5307,8 @@ int amdgpu_device_gpu_recover_imp(struct amdgpu_device *adev,
>   
>   	if (r)
>   		dev_info(adev->dev, "GPU reset end with ret = %d\n", r);
> +
> +	atomic_set(&adev->reset_domain->reset_res, r);
>   	return r;
>   }
>   
> @@ -5321,7 +5323,7 @@ static void amdgpu_device_queue_gpu_recover_work(struct work_struct *work)
>   {
>   	struct amdgpu_recover_work_struct *recover_work = container_of(work, struct amdgpu_recover_work_struct, base);
>   
> -	recover_work->ret = amdgpu_device_gpu_recover_imp(recover_work->adev, recover_work->job);
> +	amdgpu_device_gpu_recover_imp(recover_work->adev, recover_work->job);
>   }
>   /*
>    * Serialize gpu recover into reset domain single threaded wq
> @@ -5338,7 +5340,7 @@ int amdgpu_device_gpu_recover(struct amdgpu_device *adev,
>   
>   	flush_work(&work.base);
>   
> -	return work.ret;
> +	return atomic_read(&adev->reset_domain->reset_res);
>   }
>   
>   /**
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_reset.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_reset.c
> index c80af0889773..32c86a0b145c 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_reset.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_reset.c
> @@ -132,6 +132,7 @@ struct amdgpu_reset_domain *amdgpu_reset_create_reset_domain(enum amdgpu_reset_d
>   	}
>   
>   	atomic_set(&reset_domain->in_gpu_reset, 0);
> +	atomic_set(&reset_domain->reset_res, 0);
>   	init_rwsem(&reset_domain->sem);
>   
>   	return reset_domain;
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_reset.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_reset.h
> index 1949dbe28a86..9e55a5d7a825 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_reset.h
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_reset.h
> @@ -82,6 +82,7 @@ struct amdgpu_reset_domain {
>   	enum amdgpu_reset_domain_type type;
>   	struct rw_semaphore sem;
>   	atomic_t in_gpu_reset;
> +	atomic_t reset_res;

Maybe we should both atomics into "active" and "result" since they are 
already part of the reset domain.

But only a nit pick, feel free to add Reviewed-by: Christian König 
<christian.koenig@amd.com> either way.

Regards,
Christian.

>   };
>   
>