text: /*	$OpenBSD: ttm_page_alloc.h,v 1.1 2013/08/12 04:11:53 jsg Exp $	*/
  /*
   * Copyright (c) Red Hat Inc.
  
   * Permission is hereby granted, free of charge, to any person obtaining a
   * copy of this software and associated documentation files (the "Software"),
   * to deal in the Software without restriction, including without limitation
   * the rights to use, copy, modify, merge, publish, distribute, sub license,
   * and/or sell copies of the Software, and to permit persons to whom the
   * Software is furnished to do so, subject to the following conditions:
   *
   * The above copyright notice and this permission notice (including the
   * next paragraph) shall be included in all copies or substantial portions
   * of the Software.
   *
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
   * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
   * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
   * DEALINGS IN THE SOFTWARE.
   *
   * Authors: Dave Airlie <airlied@redhat.com>
   *          Jerome Glisse <jglisse@redhat.com>
   */
  #ifndef TTM_PAGE_ALLOC
  #define TTM_PAGE_ALLOC
  
  #include <dev/pci/drm/ttm/ttm_bo_driver.h>
  #include <dev/pci/drm/ttm/ttm_memory.h>
  
  /**
   * Initialize pool allocator.
   */
  int ttm_page_alloc_init(struct ttm_mem_global *glob, unsigned max_pages);
  /**
   * Free pool allocator.
   */
  void ttm_page_alloc_fini(void);
  
  /**
   * ttm_pool_populate:
   *
   * @ttm: The struct ttm_tt to contain the backing pages.
   *
   * Add backing pages to all of @ttm
   */
  extern int ttm_pool_populate(struct ttm_tt *ttm);
  
  /**
   * ttm_pool_unpopulate:
   *
   * @ttm: The struct ttm_tt which to free backing pages.
   *
   * Free all pages of @ttm
   */
  extern void ttm_pool_unpopulate(struct ttm_tt *ttm);
  
  /**
   * Output the state of pools to debugfs file
   */
  #ifdef notyet
  extern int ttm_page_alloc_debugfs(struct seq_file *m, void *data);
  #endif
  
  
  #ifdef CONFIG_SWIOTLB
  /**
   * Initialize pool allocator.
   */
  int ttm_dma_page_alloc_init(struct ttm_mem_global *glob, unsigned max_pages);
  
  /**
   * Free pool allocator.
   */
  void ttm_dma_page_alloc_fini(void);
  
  /**
   * Output the state of pools to debugfs file
   */
  extern int ttm_dma_page_alloc_debugfs(struct seq_file *m, void *data);
  
  extern int ttm_dma_populate(struct ttm_dma_tt *ttm_dma, struct device *dev);
  extern void ttm_dma_unpopulate(struct ttm_dma_tt *ttm_dma, struct device *dev);
  
  #else
  static inline int ttm_dma_page_alloc_init(struct ttm_mem_global *glob,
  					  unsigned max_pages)
  {
  	return -ENODEV;
  }
  
  static inline void ttm_dma_page_alloc_fini(void) { return; }
  
  #ifdef notyet
  static inline int ttm_dma_page_alloc_debugfs(struct seq_file *m, void *data)
  {
  	return 0;
  }
  #endif
  #endif
  
  #endif
  