drm/amdgpu: Add field in amdgpu_dev to hold reserved doorbell index

This is a preparation work to make reserved doorbell index per device,
instead of using a global macro definition. By doing this, we can easily
change doorbell layout for future ASICs while not affecting ASICs in
production.

Signed-off-by: Oak Zeng <ozeng@amd.com>
Suggested-by: Felix Kuehling <Felix.Kuehling@amd.com>
Suggested-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@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 47a6ba9..66a4da7 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
@@ -810,6 +810,55 @@ struct amd_powerplay {
        uint32_t pp_feature;
 };
 
+/* Reserved doorbells for amdgpu (including multimedia).
+ * KFD can use all the rest in the 2M doorbell bar.
+ * For asic before vega10, doorbell is 32-bit, so the
+ * index/offset is in dword. For vega10 and after, doorbell
+ * can be 64-bit, so the index defined is in qword.
+ */
+struct amdgpu_doorbell_index {
+       uint32_t kiq;
+       uint32_t mec_ring0;
+       uint32_t mec_ring1;
+       uint32_t mec_ring2;
+       uint32_t mec_ring3;
+       uint32_t mec_ring4;
+       uint32_t mec_ring5;
+       uint32_t mec_ring6;
+       uint32_t mec_ring7;
+       uint32_t userqueue_start;
+       uint32_t userqueue_end;
+       uint32_t gfx_ring0;
+       uint32_t sdma_engine0;
+       uint32_t sdma_engine1;
+       uint32_t sdma_engine2;
+       uint32_t sdma_engine3;
+       uint32_t sdma_engine4;
+       uint32_t sdma_engine5;
+       uint32_t sdma_engine6;
+       uint32_t sdma_engine7;
+       uint32_t ih;
+       union {
+               struct {
+                       uint32_t vcn_ring0_1;
+                       uint32_t vcn_ring2_3;
+                       uint32_t vcn_ring4_5;
+                       uint32_t vcn_ring6_7;
+               } vcn;
+               struct {
+                       uint32_t uvd_ring0_1;
+                       uint32_t uvd_ring2_3;
+                       uint32_t uvd_ring4_5;
+                       uint32_t uvd_ring6_7;
+                       uint32_t vce_ring0_1;
+                       uint32_t vce_ring2_3;
+                       uint32_t vce_ring4_5;
+                       uint32_t vce_ring6_7;
+               } uvd_vce;
+       };
+       uint32_t max_assignment;
+};
+
 #define AMDGPU_RESET_MAGIC_NUM 64
 struct amdgpu_device {
        struct device                   *dev;
@@ -1023,6 +1072,7 @@ struct amdgpu_device {
        unsigned long last_mm_index;
        bool                            in_gpu_reset;
        struct mutex  lock_reset;
+       struct amdgpu_doorbell_index doorbell_index;
 };
 
 static inline struct amdgpu_device *amdgpu_ttm_adev(struct ttm_bo_device *bdev)