drm/ttm: remove embedded vma_offset_manager

No users left.  Drivers either setup vma_offset_manager themself
(vmwgfx) or pass the gem vma_offset_manager to ttm_bo_device_init
(all other drivers).
Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Christian König <christian.koenig@amd.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20190905070509.22407-9-kraxel@redhat.com

drivers/gpu/drm/ttm/ttm_bo.c

@@ -1704,8 +1704,6 @@ int ttm_bo_device_release(struct ttm_bo_device *bdev)
 			pr_debug("Swap list %d was clean\n", i);
 	spin_unlock(&glob->lru_lock);
 
-	drm_vma_offset_manager_destroy(&bdev->_vma_manager);
-
 	if (!ret)
 		ttm_bo_global_release();
 
@@ -1722,8 +1720,8 @@ int ttm_bo_device_init(struct ttm_bo_device *bdev,
 	struct ttm_bo_global *glob = &ttm_bo_glob;
 	int ret;
 
-	if (!vma_manager)
-		vma_manager = &bdev->_vma_manager;
+	if (WARN_ON(vma_manager == NULL))
+		return -EINVAL;
 
 	ret = ttm_bo_global_init();
 	if (ret)
@@ -1742,9 +1740,6 @@ int ttm_bo_device_init(struct ttm_bo_device *bdev,
 		goto out_no_sys;
 
 	bdev->vma_manager = vma_manager;
-	drm_vma_offset_manager_init(&bdev->_vma_manager,
-				    DRM_FILE_PAGE_OFFSET_START,
-				    DRM_FILE_PAGE_OFFSET_SIZE);
 	INIT_DELAYED_WORK(&bdev->wq, ttm_bo_delayed_workqueue);
 	INIT_LIST_HEAD(&bdev->ddestroy);
 	bdev->dev_mapping = mapping;

include/drm/ttm/ttm_bo_driver.h

@@ -442,7 +442,6 @@ extern struct ttm_bo_global {
  * @driver: Pointer to a struct ttm_bo_driver struct setup by the driver.
  * @man: An array of mem_type_managers.
  * @vma_manager: Address space manager (pointer)
- * @_vma_manager: Address space manager (enbedded)
  * lru_lock: Spinlock that protects the buffer+device lru lists and
  * ddestroy lists.
  * @dev_mapping: A pointer to the struct address_space representing the
@@ -466,7 +465,6 @@ struct ttm_bo_device {
 	 * Protected by internal locks.
 	 */
 	struct drm_vma_offset_manager *vma_manager;
-	struct drm_vma_offset_manager _vma_manager;
 
 	/*
 	 * Protected by the global:lru lock.
@@ -587,7 +585,7 @@ int ttm_bo_device_release(struct ttm_bo_device *bdev);
  * @glob: A pointer to an initialized struct ttm_bo_global.
  * @driver: A pointer to a struct ttm_bo_driver set up by the caller.
  * @mapping: The address space to use for this bo.
- * @vma_manager: A pointer to a vma manager or NULL.
+ * @vma_manager: A pointer to a vma manager.
  * @file_page_offset: Offset into the device address space that is available
  * for buffer data. This ensures compatibility with other users of the
  * address space.