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| 3391 | Serge | 1 | /* |
| 2 | * Copyright (c) Red Hat Inc. |
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| 3 | |||
| 4 | * Permission is hereby granted, free of charge, to any person obtaining a |
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| 5 | * copy of this software and associated documentation files (the "Software"), |
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| 6 | * to deal in the Software without restriction, including without limitation |
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| 7 | * the rights to use, copy, modify, merge, publish, distribute, sub license, |
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| 8 | * and/or sell copies of the Software, and to permit persons to whom the |
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| 9 | * Software is furnished to do so, subject to the following conditions: |
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| 10 | * |
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| 11 | * The above copyright notice and this permission notice (including the |
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| 12 | * next paragraph) shall be included in all copies or substantial portions |
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| 13 | * of the Software. |
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| 14 | * |
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| 15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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| 16 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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| 17 | * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL |
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| 18 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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| 19 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
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| 20 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
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| 21 | * DEALINGS IN THE SOFTWARE. |
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| 22 | * |
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| 23 | * Authors: Dave Airlie |
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| 24 | * Jerome Glisse |
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| 25 | */ |
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| 26 | #ifndef TTM_PAGE_ALLOC |
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| 27 | #define TTM_PAGE_ALLOC |
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| 28 | |||
| 29 | #include |
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| 30 | #include |
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| 31 | |||
| 32 | /** |
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| 33 | * Initialize pool allocator. |
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| 34 | */ |
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| 35 | int ttm_page_alloc_init(struct ttm_mem_global *glob, unsigned max_pages); |
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| 36 | /** |
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| 37 | * Free pool allocator. |
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| 38 | */ |
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| 39 | void ttm_page_alloc_fini(void); |
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| 40 | |||
| 41 | /** |
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| 42 | * ttm_pool_populate: |
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| 43 | * |
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| 44 | * @ttm: The struct ttm_tt to contain the backing pages. |
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| 45 | * |
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| 46 | * Add backing pages to all of @ttm |
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| 47 | */ |
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| 48 | extern int ttm_pool_populate(struct ttm_tt *ttm); |
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| 49 | |||
| 50 | /** |
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| 51 | * ttm_pool_unpopulate: |
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| 52 | * |
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| 53 | * @ttm: The struct ttm_tt which to free backing pages. |
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| 54 | * |
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| 55 | * Free all pages of @ttm |
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| 56 | */ |
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| 57 | extern void ttm_pool_unpopulate(struct ttm_tt *ttm); |
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| 58 | |||
| 59 | /** |
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| 60 | * Output the state of pools to debugfs file |
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| 61 | */ |
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| 62 | extern int ttm_page_alloc_debugfs(struct seq_file *m, void *data); |
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| 63 | |||
| 64 | |||
| 65 | #ifdef CONFIG_SWIOTLB |
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| 66 | /** |
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| 67 | * Initialize pool allocator. |
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| 68 | */ |
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| 69 | int ttm_dma_page_alloc_init(struct ttm_mem_global *glob, unsigned max_pages); |
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| 70 | |||
| 71 | /** |
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| 72 | * Free pool allocator. |
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| 73 | */ |
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| 74 | void ttm_dma_page_alloc_fini(void); |
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| 75 | |||
| 76 | /** |
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| 77 | * Output the state of pools to debugfs file |
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| 78 | */ |
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| 79 | extern int ttm_dma_page_alloc_debugfs(struct seq_file *m, void *data); |
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| 80 | |||
| 81 | extern int ttm_dma_populate(struct ttm_dma_tt *ttm_dma, struct device *dev); |
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| 82 | extern void ttm_dma_unpopulate(struct ttm_dma_tt *ttm_dma, struct device *dev); |
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| 83 | |||
| 84 | #else |
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| 85 | static inline int ttm_dma_page_alloc_init(struct ttm_mem_global *glob, |
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| 86 | unsigned max_pages) |
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| 87 | { |
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| 88 | return -ENODEV; |
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| 89 | } |
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| 90 | |||
| 91 | static inline void ttm_dma_page_alloc_fini(void) { return; } |
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| 92 | |||
| 93 | static inline int ttm_dma_page_alloc_debugfs(struct seq_file *m, void *data) |
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| 94 | { |
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| 95 | return 0; |
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| 96 | } |
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| 97 | #endif |
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| 98 | |||
| 99 | #endif |