[PATCH 02/10] drm/amdgpu/UAPI: add new CS chunk for GFX shadow buffers

[Alex Deucher]

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.

Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
---
 include/uapi/drm/amdgpu_drm.h | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/include/uapi/drm/amdgpu_drm.h b/include/uapi/drm/amdgpu_drm.h
index cb22bb78c373..be43d5f96534 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 +709,12 @@ struct drm_amdgpu_cs_chunk_data {
 	};
 };
 
+struct drm_amdgpu_cs_chunk_cp_gfx_shadow {
+       __u64 shadow_va;
+       __u64 csa_va;
+       __u64 gds_va;
+};
+
 /*
  *  Query h/w info: Flag that this is integrated (a.h.a. fusion) GPU
  *
-- 
2.39.2