[PATCH 07/11] drm/amdgpu: add UAPI to query GFX shadow sizes

[Marek Olšák]

On Mon, Mar 20, 2023 at 1:38 PM Alex Deucher <alexander.deucher at amd.com>
wrote:

> Add UAPI to query the GFX shadow buffer requirements
> for preemption on GFX11.  UMDs need to specify the shadow
> areas for preemption.
>
> Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
> ---
>  include/uapi/drm/amdgpu_drm.h | 10 ++++++++++
>  1 file changed, 10 insertions(+)
>
> diff --git a/include/uapi/drm/amdgpu_drm.h b/include/uapi/drm/amdgpu_drm.h
> index 3d9474af6566..19a806145371 100644
> --- a/include/uapi/drm/amdgpu_drm.h
> +++ b/include/uapi/drm/amdgpu_drm.h
> @@ -886,6 +886,7 @@ struct drm_amdgpu_cs_chunk_cp_gfx_shadow {
>         #define AMDGPU_INFO_VIDEO_CAPS_DECODE           0
>         /* Subquery id: Encode */
>         #define AMDGPU_INFO_VIDEO_CAPS_ENCODE           1
> +#define AMDGPU_INFO_CP_GFX_SHADOW_SIZE         0x22
>

Can you put this into the device structure instead? Let's minimize the
number of kernel queries as much as possible.

Thanks,
Marek
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