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TOMOYO Linux Cross Reference
Linux/include/drm/ttm/ttm_page_alloc.h

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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 int ttm_pool_populate(struct ttm_tt *ttm, struct ttm_operation_ctx *ctx);
 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 void ttm_pool_unpopulate(struct ttm_tt *ttm);
 60 
 61 /**
 62  * Populates and DMA maps pages to fullfil a ttm_dma_populate() request
 63  */
 64 int ttm_populate_and_map_pages(struct device *dev, struct ttm_dma_tt *tt,
 65                                 struct ttm_operation_ctx *ctx);
 66 
 67 /**
 68  * Unpopulates and DMA unmaps pages as part of a
 69  * ttm_dma_unpopulate() request */
 70 void ttm_unmap_and_unpopulate_pages(struct device *dev, struct ttm_dma_tt *tt);
 71 
 72 /**
 73  * Output the state of pools to debugfs file
 74  */
 75 int ttm_page_alloc_debugfs(struct seq_file *m, void *data);
 76 
 77 #if defined(CONFIG_SWIOTLB) || defined(CONFIG_INTEL_IOMMU)
 78 /**
 79  * Initialize pool allocator.
 80  */
 81 int ttm_dma_page_alloc_init(struct ttm_mem_global *glob, unsigned max_pages);
 82 
 83 /**
 84  * Free pool allocator.
 85  */
 86 void ttm_dma_page_alloc_fini(void);
 87 
 88 /**
 89  * Output the state of pools to debugfs file
 90  */
 91 int ttm_dma_page_alloc_debugfs(struct seq_file *m, void *data);
 92 
 93 int ttm_dma_populate(struct ttm_dma_tt *ttm_dma, struct device *dev,
 94                         struct ttm_operation_ctx *ctx);
 95 void ttm_dma_unpopulate(struct ttm_dma_tt *ttm_dma, struct device *dev);
 96 
 97 #else
 98 static inline int ttm_dma_page_alloc_init(struct ttm_mem_global *glob,
 99                                           unsigned max_pages)
100 {
101         return -ENODEV;
102 }
103 
104 static inline void ttm_dma_page_alloc_fini(void) { return; }
105 
106 static inline int ttm_dma_page_alloc_debugfs(struct seq_file *m, void *data)
107 {
108         return 0;
109 }
110 static inline int ttm_dma_populate(struct ttm_dma_tt *ttm_dma,
111                                 struct device *dev,
112                                 struct ttm_operation_ctx *ctx)
113 {
114         return -ENOMEM;
115 }
116 static inline void ttm_dma_unpopulate(struct ttm_dma_tt *ttm_dma,
117                                       struct device *dev)
118 {
119 }
120 #endif
121 
122 #endif
123 

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