drm/amdgpu: IOCTL interface for PRT support v4

Till GFX8 we can only enable PRT support globally, but with the next hardware
generation we can do this on a per page basis.

Keep the interface consistent by adding PRT mappings and enable
support globally on current hardware when the first mapping is made.

v2: disable PRT support delayed and on all error paths
v3: PRT and other permissions are mutal exclusive,
    PRT mappings don't need a BO.
v4: update PRT mappings durign CS as well, make va_flags 64bit

Signed-off-by: Junwei Zhang <Jerry.Zhang@amd.com>
Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/include/uapi/drm/amdgpu_drm.h b/include/uapi/drm/amdgpu_drm.h
index 5797283c2d79..1c0ddf71193e 100644
--- a/include/uapi/drm/amdgpu_drm.h
+++ b/include/uapi/drm/amdgpu_drm.h
@@ -361,6 +361,8 @@ struct drm_amdgpu_gem_op {
 #define AMDGPU_VM_PAGE_WRITEABLE        (1 << 2)
 /* executable mapping, new for VI */
 #define AMDGPU_VM_PAGE_EXECUTABLE       (1 << 3)
+/* partially resident texture */
+#define AMDGPU_VM_PAGE_PRT              (1 << 4)
 
 struct drm_amdgpu_gem_va {
         /** GEM object handle */