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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. struct device;
  33.  
  34. /**
  35.  * Initialize pool allocator.
  36.  */
  37. int ttm_page_alloc_init(struct ttm_mem_global *glob, unsigned max_pages);
  38. /**
  39.  * Free pool allocator.
  40.  */
  41. void ttm_page_alloc_fini(void);
  42.  
  43. /**
  44.  * ttm_pool_populate:
  45.  *
  46.  * @ttm: The struct ttm_tt to contain the backing pages.
  47.  *
  48.  * Add backing pages to all of @ttm
  49.  */
  50. extern int ttm_pool_populate(struct ttm_tt *ttm);
  51.  
  52. /**
  53.  * ttm_pool_unpopulate:
  54.  *
  55.  * @ttm: The struct ttm_tt which to free backing pages.
  56.  *
  57.  * Free all pages of @ttm
  58.  */
  59. extern void ttm_pool_unpopulate(struct ttm_tt *ttm);
  60.  
  61. /**
  62.  * Output the state of pools to debugfs file
  63.  */
  64. extern int ttm_page_alloc_debugfs(struct seq_file *m, void *data);
  65.  
  66.  
  67. #if defined(CONFIG_SWIOTLB) || defined(CONFIG_INTEL_IOMMU)
  68. /**
  69.  * Initialize pool allocator.
  70.  */
  71. int ttm_dma_page_alloc_init(struct ttm_mem_global *glob, unsigned max_pages);
  72.  
  73. /**
  74.  * Free pool allocator.
  75.  */
  76. void ttm_dma_page_alloc_fini(void);
  77.  
  78. /**
  79.  * Output the state of pools to debugfs file
  80.  */
  81. extern int ttm_dma_page_alloc_debugfs(struct seq_file *m, void *data);
  82.  
  83. extern int ttm_dma_populate(struct ttm_dma_tt *ttm_dma, struct device *dev);
  84. extern void ttm_dma_unpopulate(struct ttm_dma_tt *ttm_dma, struct device *dev);
  85.  
  86. #else
  87. static inline int ttm_dma_page_alloc_init(struct ttm_mem_global *glob,
  88.                                           unsigned max_pages)
  89. {
  90.         return -ENODEV;
  91. }
  92.  
  93. static inline void ttm_dma_page_alloc_fini(void) { return; }
  94.  
  95. static inline int ttm_dma_page_alloc_debugfs(struct seq_file *m, void *data)
  96. {
  97.         return 0;
  98. }
  99. static inline int ttm_dma_populate(struct ttm_dma_tt *ttm_dma,
  100.                                    struct device *dev)
  101. {
  102.         return -ENOMEM;
  103. }
  104. static inline void ttm_dma_unpopulate(struct ttm_dma_tt *ttm_dma,
  105.                                       struct device *dev)
  106. {
  107. }
  108. #endif
  109.  
  110. #endif
  111.