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1 | /* |
2 | * Copyright (C) 2013 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 FROM, | |
20 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
21 | * SOFTWARE. | |
22 | */ | |
23 | ||
24 | #ifndef DRM_FLIP_WORK_H | |
25 | #define DRM_FLIP_WORK_H | |
26 | ||
27 | #include <linux/kfifo.h> | |
8bd4ae20 | 28 | #include <linux/spinlock.h> |
cabaafc7 RC |
29 | #include <linux/workqueue.h> |
30 | ||
31 | /** | |
32 | * DOC: flip utils | |
33 | * | |
34 | * Util to queue up work to run from work-queue context after flip/vblank. | |
35 | * Typically this can be used to defer unref of framebuffer's, cursor | |
8bd4ae20 BB |
36 | * bo's, etc until after vblank. The APIs are all thread-safe. |
37 | * Moreover, drm_flip_work_queue_task and drm_flip_work_queue can be called | |
38 | * in atomic context. | |
cabaafc7 RC |
39 | */ |
40 | ||
41 | struct drm_flip_work; | |
42 | ||
43 | /* | |
44 | * drm_flip_func_t - callback function | |
45 | * | |
46 | * @work: the flip work | |
47 | * @val: value queued via drm_flip_work_queue() | |
48 | * | |
49 | * Callback function to be called for each of the queue'd work items after | |
50 | * drm_flip_work_commit() is called. | |
51 | */ | |
52 | typedef void (*drm_flip_func_t)(struct drm_flip_work *work, void *val); | |
53 | ||
8bd4ae20 BB |
54 | /** |
55 | * struct drm_flip_task - flip work task | |
56 | * @node: list entry element | |
57 | * @data: data to pass to work->func | |
58 | */ | |
59 | struct drm_flip_task { | |
60 | struct list_head node; | |
61 | void *data; | |
62 | }; | |
63 | ||
cabaafc7 RC |
64 | /** |
65 | * struct drm_flip_work - flip work queue | |
66 | * @name: debug name | |
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67 | * @func: callback fxn called for each committed item |
68 | * @worker: worker which calls @func | |
8bd4ae20 BB |
69 | * @queued: queued tasks |
70 | * @commited: commited tasks | |
71 | * @lock: lock to access queued and commited lists | |
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72 | */ |
73 | struct drm_flip_work { | |
74 | const char *name; | |
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75 | drm_flip_func_t func; |
76 | struct work_struct worker; | |
8bd4ae20 BB |
77 | struct list_head queued; |
78 | struct list_head commited; | |
79 | spinlock_t lock; | |
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80 | }; |
81 | ||
8bd4ae20 BB |
82 | struct drm_flip_task *drm_flip_work_allocate_task(void *data, gfp_t flags); |
83 | void drm_flip_work_queue_task(struct drm_flip_work *work, | |
84 | struct drm_flip_task *task); | |
cabaafc7 RC |
85 | void drm_flip_work_queue(struct drm_flip_work *work, void *val); |
86 | void drm_flip_work_commit(struct drm_flip_work *work, | |
87 | struct workqueue_struct *wq); | |
d7f8db53 | 88 | void drm_flip_work_init(struct drm_flip_work *work, |
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89 | const char *name, drm_flip_func_t func); |
90 | void drm_flip_work_cleanup(struct drm_flip_work *work); | |
91 | ||
92 | #endif /* DRM_FLIP_WORK_H */ |