drm/amdgpu: add invisible pin size statistic

Signed-off-by: Chunming Zhou <David1.Zhou@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
index 62a7780..b77489d 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
@@ -2034,6 +2034,7 @@
 
 	/* tracking pinned memory */
 	u64 vram_pin_size;
+	u64 invisible_pin_size;
 	u64 gart_pin_size;
 
 	/* amdkfd interface */