drm/amdgpu: add UAPI for allocating doorbell memory

This patch adds flags for a new gem domain AMDGPU_GEM_DOMAIN_DOORBELL
in the UAPI layer.

V2: Drop 'memory' from description (Christian)

Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: Christian Koenig <christian.koenig@amd.com>
Reviewed-by: Christian Koenig <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Shashank Sharma <shashank.sharma@amd.com>

diff --git a/include/uapi/drm/amdgpu_drm.h b/include/uapi/drm/amdgpu_drm.h
index 79b1482..f477eda 100644 (file)
--- a/include/uapi/drm/amdgpu_drm.h
+++ b/include/uapi/drm/amdgpu_drm.h
@@ -94,6 +94,9 @@ extern "C" {
  *
  * %AMDGPU_GEM_DOMAIN_OA       Ordered append, used by 3D or Compute engines
  * for appending data.
+ *
+ * %AMDGPU_GEM_DOMAIN_DOORBELL Doorbell. It is an MMIO region for
+ * signalling user mode queues.
  */
 #define AMDGPU_GEM_DOMAIN_CPU          0x1
 #define AMDGPU_GEM_DOMAIN_GTT          0x2
@@ -101,12 +104,14 @@ extern "C" {
 #define AMDGPU_GEM_DOMAIN_GDS          0x8
 #define AMDGPU_GEM_DOMAIN_GWS          0x10
 #define AMDGPU_GEM_DOMAIN_OA           0x20
+#define AMDGPU_GEM_DOMAIN_DOORBELL     0x40
 #define AMDGPU_GEM_DOMAIN_MASK         (AMDGPU_GEM_DOMAIN_CPU | \
                                         AMDGPU_GEM_DOMAIN_GTT | \
                                         AMDGPU_GEM_DOMAIN_VRAM | \
                                         AMDGPU_GEM_DOMAIN_GDS | \
                                         AMDGPU_GEM_DOMAIN_GWS | \
-                                        AMDGPU_GEM_DOMAIN_OA)
+                                        AMDGPU_GEM_DOMAIN_OA | \
+                                        AMDGPU_GEM_DOMAIN_DOORBELL)
 
 /* Flag that CPU access will be required for the case of VRAM domain */
 #define AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED  (1 << 0)