include/drm/ttm/ttm_page_alloc.h

   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