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