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  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.  */
  35. int ttm_page_alloc_init(struct ttm_mem_global *glob, unsigned max_pages);
  36. /**
  37.  * Free pool allocator.
  38.  */
  39. void 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.  */
  48. extern 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.  */
  57. extern void ttm_pool_unpopulate(struct ttm_tt *ttm);
  58.  
  59. /**
  60.  * Output the state of pools to debugfs file
  61.  */
  62. extern int ttm_page_alloc_debugfs(struct seq_file *m, void *data);
  63.  
  64.  
  65. #ifdef CONFIG_SWIOTLB
  66. /**
  67.  * Initialize pool allocator.
  68.  */
  69. int ttm_dma_page_alloc_init(struct ttm_mem_global *glob, unsigned max_pages);
  70.  
  71. /**
  72.  * Free pool allocator.
  73.  */
  74. void ttm_dma_page_alloc_fini(void);
  75.  
  76. /**
  77.  * Output the state of pools to debugfs file
  78.  */
  79. extern int ttm_dma_page_alloc_debugfs(struct seq_file *m, void *data);
  80.  
  81. extern int ttm_dma_populate(struct ttm_dma_tt *ttm_dma, struct device *dev);
  82. extern void ttm_dma_unpopulate(struct ttm_dma_tt *ttm_dma, struct device *dev);
  83.  
  84. #else
  85. static inline int ttm_dma_page_alloc_init(struct ttm_mem_global *glob,
  86.                                           unsigned max_pages)
  87. {
  88.         return -ENODEV;
  89. }
  90.  
  91. static inline void ttm_dma_page_alloc_fini(void) { return; }
  92.  
  93. static inline int ttm_dma_page_alloc_debugfs(struct seq_file *m, void *data)
  94. {
  95.         return 0;
  96. }
  97. #endif
  98.  
  99. #endif
  100.