[PATCH 03/13] drm/amdgpu/UAPI: add new CS chunk for GFX shadow buffers

[Marek Olšák]

gds_va is unnecessary.

Marek

On Thu, Mar 30, 2023 at 3:18 PM Alex Deucher <alexander.deucher at amd.com>
wrote:

> For GFX11, the UMD needs to allocate some shadow buffers
> to be used for preemption.  The UMD allocates the buffers
> and passes the GPU virtual address to the kernel since the
> kernel will program the packet that specified these
> addresses as part of its IB submission frame.
>
> v2: UMD passes shadow init to tell kernel when to initialize
>     the shadow
>
> Reviewed-by: Christian König <christian.koenig at amd.com>
> 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 b6eb90df5d05..3d9474af6566 100644
> --- a/include/uapi/drm/amdgpu_drm.h
> +++ b/include/uapi/drm/amdgpu_drm.h
> @@ -592,6 +592,7 @@ struct drm_amdgpu_gem_va {
>  #define AMDGPU_CHUNK_ID_SCHEDULED_DEPENDENCIES 0x07
>  #define AMDGPU_CHUNK_ID_SYNCOBJ_TIMELINE_WAIT    0x08
>  #define AMDGPU_CHUNK_ID_SYNCOBJ_TIMELINE_SIGNAL  0x09
> +#define AMDGPU_CHUNK_ID_CP_GFX_SHADOW   0x0a
>
>  struct drm_amdgpu_cs_chunk {
>         __u32           chunk_id;
> @@ -708,6 +709,15 @@ struct drm_amdgpu_cs_chunk_data {
>         };
>  };
>
> +#define AMDGPU_CS_CHUNK_CP_GFX_SHADOW_FLAGS_INIT_SHADOW         0x1
> +
> +struct drm_amdgpu_cs_chunk_cp_gfx_shadow {
> +       __u64 shadow_va;
> +       __u64 csa_va;
> +       __u64 gds_va;
> +       __u64 flags;
> +};
> +
>  /*
>   *  Query h/w info: Flag that this is integrated (a.h.a. fusion) GPU
>   *
> --
> 2.39.2
>
>
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