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1 | /* |
2 | * Copyright © 2017 Red Hat | |
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, sublicense, | |
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 next | |
12 | * paragraph) shall be included in all copies or substantial portions of the | |
13 | * 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 NONINFRINGEMENT. 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 DEALINGS | |
21 | * IN THE SOFTWARE. | |
22 | * | |
23 | * Authors: | |
24 | * | |
25 | */ | |
26 | #ifndef __DRM_SYNCOBJ_H__ | |
27 | #define __DRM_SYNCOBJ_H__ | |
28 | ||
29 | #include "linux/dma-fence.h" | |
30 | ||
31 | /** | |
32 | * struct drm_syncobj - sync object. | |
33 | * | |
34 | * This structure defines a generic sync object which wraps a dma fence. | |
35 | */ | |
36 | struct drm_syncobj { | |
37 | /** | |
38 | * @refcount: | |
39 | * | |
40 | * Reference count of this object. | |
41 | */ | |
42 | struct kref refcount; | |
43 | /** | |
44 | * @fence: | |
45 | * NULL or a pointer to the fence bound to this object. | |
46 | */ | |
47 | struct dma_fence *fence; | |
48 | /** | |
49 | * @file: | |
50 | * a file backing for this syncobj. | |
51 | */ | |
52 | struct file *file; | |
53 | }; | |
54 | ||
55 | void drm_syncobj_free(struct kref *kref); | |
56 | ||
57 | /** | |
58 | * drm_syncobj_get - acquire a syncobj reference | |
59 | * @obj: sync object | |
60 | * | |
61 | * This acquires additional reference to @obj. It is illegal to call this | |
62 | * without already holding a reference. No locks required. | |
63 | */ | |
64 | static inline void | |
65 | drm_syncobj_get(struct drm_syncobj *obj) | |
66 | { | |
67 | kref_get(&obj->refcount); | |
68 | } | |
69 | ||
70 | /** | |
71 | * drm_syncobj_put - release a reference to a sync object. | |
72 | * @obj: sync object. | |
73 | */ | |
74 | static inline void | |
75 | drm_syncobj_put(struct drm_syncobj *obj) | |
76 | { | |
77 | kref_put(&obj->refcount, drm_syncobj_free); | |
78 | } | |
79 | ||
80 | struct drm_syncobj *drm_syncobj_find(struct drm_file *file_private, | |
81 | u32 handle); | |
00fc2c26 | 82 | void drm_syncobj_replace_fence(struct drm_syncobj *syncobj, |
e9083420 DA |
83 | struct dma_fence *fence); |
84 | int drm_syncobj_fence_get(struct drm_file *file_private, | |
85 | u32 handle, | |
86 | struct dma_fence **fence); | |
87 | void drm_syncobj_free(struct kref *kref); | |
88 | ||
89 | #endif |