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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[] = { |
ff540b76 GH |
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)); |
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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 | ||
231927d9 GH |
52 | /** |
53 | * drm_gem_ttm_mmap() - mmap &ttm_buffer_object | |
54 | * @gem: GEM object. | |
55 | * @vma: vm area. | |
56 | * | |
57 | * This function can be used as &drm_gem_object_funcs.mmap | |
58 | * callback. | |
59 | */ | |
60 | int drm_gem_ttm_mmap(struct drm_gem_object *gem, | |
61 | struct vm_area_struct *vma) | |
62 | { | |
63 | struct ttm_buffer_object *bo = drm_gem_ttm_of_gem(gem); | |
9786b65b | 64 | int ret; |
231927d9 | 65 | |
9786b65b GH |
66 | ret = ttm_bo_mmap_obj(vma, bo); |
67 | if (ret < 0) | |
68 | return ret; | |
69 | ||
70 | /* | |
71 | * ttm has its own object refcounting, so drop gem reference | |
72 | * to avoid double accounting counting. | |
73 | */ | |
be6ee102 | 74 | drm_gem_object_put(gem); |
9786b65b GH |
75 | |
76 | return 0; | |
231927d9 GH |
77 | } |
78 | EXPORT_SYMBOL(drm_gem_ttm_mmap); | |
79 | ||
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80 | MODULE_DESCRIPTION("DRM gem ttm helpers"); |
81 | MODULE_LICENSE("GPL"); |