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ff540b76 GH |
1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2 | ||
3 | #include <linux/module.h> | |
4 | ||
5 | #include <drm/drm_gem_ttm_helper.h> | |
6 | ||
7 | /** | |
8 | * DOC: overview | |
9 | * | |
10 | * This library provides helper functions for gem objects backed by | |
11 | * ttm. | |
12 | */ | |
13 | ||
14 | /** | |
15 | * drm_gem_ttm_print_info() - Print &ttm_buffer_object info for debugfs | |
16 | * @p: DRM printer | |
17 | * @indent: Tab indentation level | |
18 | * @gem: GEM object | |
19 | * | |
20 | * This function can be used as &drm_gem_object_funcs.print_info | |
21 | * callback. | |
22 | */ | |
23 | void drm_gem_ttm_print_info(struct drm_printer *p, unsigned int indent, | |
24 | const struct drm_gem_object *gem) | |
25 | { | |
141f6357 | 26 | static const char * const plname[] = { |
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27 | [ TTM_PL_SYSTEM ] = "system", |
28 | [ TTM_PL_TT ] = "tt", | |
29 | [ TTM_PL_VRAM ] = "vram", | |
30 | [ TTM_PL_PRIV ] = "priv", | |
31 | ||
32 | [ 16 ] = "cached", | |
33 | [ 17 ] = "uncached", | |
34 | [ 18 ] = "wc", | |
35 | [ 19 ] = "contig", | |
36 | ||
37 | [ 21 ] = "pinned", /* NO_EVICT */ | |
38 | [ 22 ] = "topdown", | |
39 | }; | |
40 | const struct ttm_buffer_object *bo = drm_gem_ttm_of_gem(gem); | |
41 | ||
42 | drm_printf_indent(p, indent, "placement="); | |
141f6357 | 43 | drm_print_bits(p, bo->mem.placement, plname, ARRAY_SIZE(plname)); |
ff540b76 GH |
44 | drm_printf(p, "\n"); |
45 | ||
54d04ea8 | 46 | if (bo->mem.bus.is_iomem) |
ff540b76 GH |
47 | drm_printf_indent(p, indent, "bus.offset=%lx\n", |
48 | (unsigned long)bo->mem.bus.offset); | |
ff540b76 GH |
49 | } |
50 | EXPORT_SYMBOL(drm_gem_ttm_print_info); | |
51 | ||
43676605 TZ |
52 | /** |
53 | * drm_gem_ttm_vmap() - vmap &ttm_buffer_object | |
54 | * @gem: GEM object. | |
55 | * @map: [out] returns the dma-buf mapping. | |
56 | * | |
57 | * Maps a GEM object with ttm_bo_vmap(). This function can be used as | |
58 | * &drm_gem_object_funcs.vmap callback. | |
59 | * | |
60 | * Returns: | |
61 | * 0 on success, or a negative errno code otherwise. | |
62 | */ | |
63 | int drm_gem_ttm_vmap(struct drm_gem_object *gem, | |
64 | struct dma_buf_map *map) | |
65 | { | |
66 | struct ttm_buffer_object *bo = drm_gem_ttm_of_gem(gem); | |
67 | ||
68 | return ttm_bo_vmap(bo, map); | |
69 | } | |
70 | EXPORT_SYMBOL(drm_gem_ttm_vmap); | |
71 | ||
72 | /** | |
73 | * drm_gem_ttm_vunmap() - vunmap &ttm_buffer_object | |
74 | * @gem: GEM object. | |
75 | * @map: dma-buf mapping. | |
76 | * | |
77 | * Unmaps a GEM object with ttm_bo_vunmap(). This function can be used as | |
78 | * &drm_gem_object_funcs.vmap callback. | |
79 | */ | |
80 | void drm_gem_ttm_vunmap(struct drm_gem_object *gem, | |
81 | struct dma_buf_map *map) | |
82 | { | |
83 | struct ttm_buffer_object *bo = drm_gem_ttm_of_gem(gem); | |
84 | ||
85 | ttm_bo_vunmap(bo, map); | |
86 | } | |
87 | EXPORT_SYMBOL(drm_gem_ttm_vunmap); | |
88 | ||
231927d9 GH |
89 | /** |
90 | * drm_gem_ttm_mmap() - mmap &ttm_buffer_object | |
91 | * @gem: GEM object. | |
92 | * @vma: vm area. | |
93 | * | |
94 | * This function can be used as &drm_gem_object_funcs.mmap | |
95 | * callback. | |
96 | */ | |
97 | int drm_gem_ttm_mmap(struct drm_gem_object *gem, | |
98 | struct vm_area_struct *vma) | |
99 | { | |
100 | struct ttm_buffer_object *bo = drm_gem_ttm_of_gem(gem); | |
9786b65b | 101 | int ret; |
231927d9 | 102 | |
9786b65b GH |
103 | ret = ttm_bo_mmap_obj(vma, bo); |
104 | if (ret < 0) | |
105 | return ret; | |
106 | ||
107 | /* | |
108 | * ttm has its own object refcounting, so drop gem reference | |
109 | * to avoid double accounting counting. | |
110 | */ | |
be6ee102 | 111 | drm_gem_object_put(gem); |
9786b65b GH |
112 | |
113 | return 0; | |
231927d9 GH |
114 | } |
115 | EXPORT_SYMBOL(drm_gem_ttm_mmap); | |
116 | ||
ff540b76 GH |
117 | MODULE_DESCRIPTION("DRM gem ttm helpers"); |
118 | MODULE_LICENSE("GPL"); |