[PATCH] drm/amdgpu: add VRAM lost query

[Nicolai Hähnle]

On 09.10.2017 17:53, Christian König wrote:
> From: Christian König <christian.koenig at amd.com>
> 
> Allows userspace to figure out if VRAM was lost.
> 
> Signed-off-by: Christian König <christian.koenig at amd.com>

Yes, I think we can use this in Mesa. We'll need to actually code this 
up, but for now this patch is:

Reviewed-by: Nicolai Hähnle <nicolai.haehnle at amd.com>


> ---
>   drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c | 3 +++
>   include/uapi/drm/amdgpu_drm.h           | 1 +
>   2 files changed, 4 insertions(+)
> 
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
> index 0fc36b2..49cc496 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c
> @@ -762,6 +762,9 @@ static int amdgpu_info_ioctl(struct drm_device *dev, void *data, struct drm_file
>   		}
>   		return copy_to_user(out, &ui32, min(size, 4u)) ? -EFAULT : 0;
>   	}
> +	case AMDGPU_INFO_VRAM_LOST_COUNTER:
> +		ui32 = atomic_read(&adev->vram_lost_counter);
> +		return copy_to_user(out, &ui32, min(size, 4u)) ? -EFAULT : 0;
>   	default:
>   		DRM_DEBUG_KMS("Invalid request %d\n", info->query);
>   		return -EINVAL;
> diff --git a/include/uapi/drm/amdgpu_drm.h b/include/uapi/drm/amdgpu_drm.h
> index 3bf41a6..de0a2ac 100644
> --- a/include/uapi/drm/amdgpu_drm.h
> +++ b/include/uapi/drm/amdgpu_drm.h
> @@ -632,6 +632,7 @@ struct drm_amdgpu_cs_chunk_data {
>   	#define AMDGPU_INFO_SENSOR_VDDGFX		0x7
>   /* Number of VRAM page faults on CPU access. */
>   #define AMDGPU_INFO_NUM_VRAM_CPU_PAGE_FAULTS	0x1E
> +#define AMDGPU_INFO_VRAM_LOST_COUNTER		0x1F
>   
>   #define AMDGPU_INFO_MMR_SE_INDEX_SHIFT	0
>   #define AMDGPU_INFO_MMR_SE_INDEX_MASK	0xff
> 


-- 
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Aber vergiss niemals, wie sie sein sollte.