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 <dev/drm2/ttm/ttm_bo_driver.h> 30 #include <dev/drm2/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 /* XXXKIB 63 extern int ttm_page_alloc_debugfs(struct seq_file *m, void *data); 64 */ 65 66 #ifdef CONFIG_SWIOTLB 67 /** 68 * Initialize pool allocator. 69 */ 70 int ttm_dma_page_alloc_init(struct ttm_mem_global *glob, unsigned max_pages); 71 72 /** 73 * Free pool allocator. 74 */ 75 void ttm_dma_page_alloc_fini(void); 76 77 /** 78 * Output the state of pools to debugfs file 79 */ 80 extern int ttm_dma_page_alloc_debugfs(struct seq_file *m, void *data); 81 82 extern int ttm_dma_populate(struct ttm_dma_tt *ttm_dma, struct device *dev); 83 extern void ttm_dma_unpopulate(struct ttm_dma_tt *ttm_dma, struct device *dev); 84 85 #else 86 static inline int ttm_dma_page_alloc_init(struct ttm_mem_global *glob, 87 unsigned max_pages) 88 { 89 return -ENODEV; 90 } 91 92 static inline void ttm_dma_page_alloc_fini(void) { return; } 93 94 /* XXXKIB 95 static inline int ttm_dma_page_alloc_debugfs(struct seq_file *m, void *data) 96 { 97 return 0; 98 } 99 */ 100 #endif 101 102 #endif 103