On Mon, Mar 20, 2023 at 1:38 PM Alex Deucher <alexander.deuc...@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.deuc...@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
>
> #define AMDGPU_INFO_MMR_SE_INDEX_SHIFT 0
> #define AMDGPU_INFO_MMR_SE_INDEX_MASK 0xff
> @@ -1203,6 +1204,15 @@ struct drm_amdgpu_info_video_caps {
> struct drm_amdgpu_info_video_codec_info
> codec_info[AMDGPU_INFO_VIDEO_CAPS_CODEC_IDX_COUNT];
> };
>
> +struct drm_amdgpu_info_cp_gfx_shadow_size {
> + __u32 shadow_size;
> + __u32 shadow_alignment;
> + __u32 csa_size;
> + __u32 csa_alignment;
> + __u32 gds_size;
> + __u32 gds_alignment;
>
Can you document the fields? What is CSA? Also, why is GDS there when the
hw deprecated it and replaced it with GDS registers?
Thanks,
Marek
