drm/amdgpu: Add per device sdma_doorbell_range field

Different ASIC has different sdma doorbell range. Add
a per device sdma_doorbell_range field and initialize
it.
Signed-off-by: Oak Zeng <Oak.Zeng@amd.com>
Reviewed-by: Philip Yang <Philip.Yang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/amdgpu_doorbell.h

@@ -72,6 +72,8 @@ struct amdgpu_doorbell_index {
 		} uvd_vce;
 	};
 	uint32_t max_assignment;
+	/* Per engine SDMA doorbell size in dword */
+	uint32_t sdma_doorbell_range;
 };
 
 typedef enum _AMDGPU_DOORBELL_ASSIGNMENT

drivers/gpu/drm/amd/amdgpu/vega10_reg_init.c

@@ -83,5 +83,6 @@ void vega10_doorbell_index_init(struct amdgpu_device *adev)
 	adev->doorbell_index.uvd_vce.vce_ring6_7 = AMDGPU_DOORBELL64_VCE_RING6_7;
 	/* In unit of dword doorbell */
 	adev->doorbell_index.max_assignment = AMDGPU_DOORBELL64_MAX_ASSIGNMENT << 1;
+	adev->doorbell_index.sdma_doorbell_range = 4;
 }
 

drivers/gpu/drm/amd/amdgpu/vega20_reg_init.c

@@ -86,5 +86,6 @@ void vega20_doorbell_index_init(struct amdgpu_device *adev)
 	adev->doorbell_index.uvd_vce.vce_ring4_5 = AMDGPU_VEGA20_DOORBELL64_VCE_RING4_5;
 	adev->doorbell_index.uvd_vce.vce_ring6_7 = AMDGPU_VEGA20_DOORBELL64_VCE_RING6_7;
 	adev->doorbell_index.max_assignment = AMDGPU_VEGA20_DOORBELL_MAX_ASSIGNMENT << 1;
+	adev->doorbell_index.sdma_doorbell_range = 20;
 }