LXR linux/include/drm/ttm/ttm_page

   1/*
   2 * Copyright (c) Red Hat Inc.
   3
   4 * Permission is hereby granted, free of charge, to any person obtaining a
   5 * copy of this software and associated documentation files (the "Software"),
   6 * to deal in the Software without restriction, including without limitation
   7 * the rights to use, copy, modify, merge, publish, distribute, sub license,
   8 * and/or sell copies of the Software, and to permit persons to whom the
   9 * Software is furnished to do so, subject to the following conditions:
  10 *
  11 * The above copyright notice and this permission notice (including the
  12 * next paragraph) shall be included in all copies or substantial portions
  13 * of the Software.
  14 *
  15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
  18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  21 * DEALINGS IN THE SOFTWARE.
  22 *
  23 * Authors: Dave Airlie <airlied@redhat.com>
  24 *          Jerome Glisse <jglisse@redhat.com>
  25 */
  26#ifndef TTM_PAGE_ALLOC
  27#define TTM_PAGE_ALLOC
  28
  29#include <drm/ttm/ttm_bo_driver.h>
  30#include <drm/ttm/ttm_memory.h>
  31
  32/**
  33 * Initialize pool allocator.
  34 */
  35int ttm_page_alloc_init(struct ttm_mem_global *glob, unsigned max_pages);
  36/**
  37 * Free pool allocator.
  38 */
  39void ttm_page_alloc_fini(void);
  40
  41/**
  42 * ttm_pool_populate:
  43 *
  44 * @ttm: The struct ttm_tt to contain the backing pages.
  45 *
  46 * Add backing pages to all of @ttm
  47 */
  48extern int ttm_pool_populate(struct ttm_tt *ttm);
  49
  50/**
  51 * ttm_pool_unpopulate:
  52 *
  53 * @ttm: The struct ttm_tt which to free backing pages.
  54 *
  55 * Free all pages of @ttm
  56 */
  57extern void ttm_pool_unpopulate(struct ttm_tt *ttm);
  58
  59/**
  60 * Output the state of pools to debugfs file
  61 */
  62extern int ttm_page_alloc_debugfs(struct seq_file *m, void *data);
  63
  64
  65#ifdef CONFIG_SWIOTLB
  66/**
  67 * Initialize pool allocator.
  68 */
  69int ttm_dma_page_alloc_init(struct ttm_mem_global *glob, unsigned max_pages);
  70
  71/**
  72 * Free pool allocator.
  73 */
  74void ttm_dma_page_alloc_fini(void);
  75
  76/**
  77 * Output the state of pools to debugfs file
  78 */
  79extern int ttm_dma_page_alloc_debugfs(struct seq_file *m, void *data);
  80
  81extern int ttm_dma_populate(struct ttm_dma_tt *ttm_dma, struct device *dev);
  82extern void ttm_dma_unpopulate(struct ttm_dma_tt *ttm_dma, struct device *dev);
  83
  84#else
  85static inline int ttm_dma_page_alloc_init(struct ttm_mem_global *glob,
  86                                          unsigned max_pages)
  87{
  88        return -ENODEV;
  89}
  90
  91static inline void ttm_dma_page_alloc_fini(void) { return; }
  92
  93static inline int ttm_dma_page_alloc_debugfs(struct seq_file *m, void *data)
  94{
  95        return 0;
  96}
  97#endif
  98
  99#endif
 100