drm/amdgpu: apply top reserved VA space to pre Vega10 as well

Reserve VA space at the top for older generations as well.
Signed-off-by: NChristian König <christian.koenig@amd.com>
Reviewed-by: NAlex Deucher <alexander.deucher@amd.com>
Acked-by: NMonk Liu <monk.liu@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

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

@@ -580,11 +580,11 @@ static int amdgpu_info_ioctl(struct drm_device *dev, void *data, struct drm_file
 			dev_info.ids_flags |= AMDGPU_IDS_FLAGS_PREEMPTION;
 
 		vm_size = adev->vm_manager.max_pfn * AMDGPU_GPU_PAGE_SIZE;
+		vm_size -= AMDGPU_VA_RESERVED_SIZE;
 		dev_info.virtual_address_offset = AMDGPU_VA_RESERVED_SIZE;
 		dev_info.virtual_address_max =
 			min(vm_size, AMDGPU_VA_HOLE_START);
 
-		vm_size -= AMDGPU_VA_RESERVED_SIZE;
 		if (vm_size > AMDGPU_VA_HOLE_START) {
 			dev_info.high_va_offset = AMDGPU_VA_HOLE_END;
 			dev_info.high_va_max = AMDGPU_VA_HOLE_END | vm_size;

drivers/gpu/drm/amd/amdgpu/gmc_v6_0.c

@@ -469,7 +469,8 @@ static void gmc_v6_0_set_prt(struct amdgpu_device *adev, bool enable)
 
 	if (enable) {
 		uint32_t low = AMDGPU_VA_RESERVED_SIZE >> AMDGPU_GPU_PAGE_SHIFT;
-		uint32_t high = adev->vm_manager.max_pfn;
+		uint32_t high = adev->vm_manager.max_pfn -
+			(AMDGPU_VA_RESERVED_SIZE >> AMDGPU_GPU_PAGE_SHIFT);
 
 		WREG32(mmVM_PRT_APERTURE0_LOW_ADDR, low);
 		WREG32(mmVM_PRT_APERTURE1_LOW_ADDR, low);

drivers/gpu/drm/amd/amdgpu/gmc_v7_0.c

@@ -562,7 +562,8 @@ static void gmc_v7_0_set_prt(struct amdgpu_device *adev, bool enable)
 
 	if (enable) {
 		uint32_t low = AMDGPU_VA_RESERVED_SIZE >> AMDGPU_GPU_PAGE_SHIFT;
-		uint32_t high = adev->vm_manager.max_pfn;
+		uint32_t high = adev->vm_manager.max_pfn -
+			(AMDGPU_VA_RESERVED_SIZE >> AMDGPU_GPU_PAGE_SHIFT);
 
 		WREG32(mmVM_PRT_APERTURE0_LOW_ADDR, low);
 		WREG32(mmVM_PRT_APERTURE1_LOW_ADDR, low);

drivers/gpu/drm/amd/amdgpu/gmc_v8_0.c

@@ -762,7 +762,8 @@ static void gmc_v8_0_set_prt(struct amdgpu_device *adev, bool enable)
 
 	if (enable) {
 		uint32_t low = AMDGPU_VA_RESERVED_SIZE >> AMDGPU_GPU_PAGE_SHIFT;
-		uint32_t high = adev->vm_manager.max_pfn;
+		uint32_t high = adev->vm_manager.max_pfn -
+			(AMDGPU_VA_RESERVED_SIZE >> AMDGPU_GPU_PAGE_SHIFT);
 
 		WREG32(mmVM_PRT_APERTURE0_LOW_ADDR, low);
 		WREG32(mmVM_PRT_APERTURE1_LOW_ADDR, low);