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1 | /* |
2 | * fence-array: aggregates fence to be waited together | |
3 | * | |
4 | * Copyright (C) 2016 Collabora Ltd | |
5 | * Copyright (C) 2016 Advanced Micro Devices, Inc. | |
6 | * Authors: | |
7 | * Gustavo Padovan <gustavo@padovan.org> | |
8 | * Christian König <christian.koenig@amd.com> | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify it | |
11 | * under the terms of the GNU General Public License version 2 as published by | |
12 | * the Free Software Foundation. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, but WITHOUT | |
15 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
16 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
17 | * more details. | |
18 | */ | |
19 | ||
20 | #ifndef __LINUX_FENCE_ARRAY_H | |
21 | #define __LINUX_FENCE_ARRAY_H | |
22 | ||
23 | #include <linux/fence.h> | |
24 | ||
25 | /** | |
26 | * struct fence_array_cb - callback helper for fence array | |
27 | * @cb: fence callback structure for signaling | |
28 | * @array: reference to the parent fence array object | |
29 | */ | |
30 | struct fence_array_cb { | |
31 | struct fence_cb cb; | |
32 | struct fence_array *array; | |
33 | }; | |
34 | ||
35 | /** | |
36 | * struct fence_array - fence to represent an array of fences | |
37 | * @base: fence base class | |
38 | * @lock: spinlock for fence handling | |
39 | * @num_fences: number of fences in the array | |
40 | * @num_pending: fences in the array still pending | |
41 | * @fences: array of the fences | |
42 | */ | |
43 | struct fence_array { | |
44 | struct fence base; | |
45 | ||
46 | spinlock_t lock; | |
47 | unsigned num_fences; | |
48 | atomic_t num_pending; | |
49 | struct fence **fences; | |
50 | }; | |
51 | ||
52 | extern const struct fence_ops fence_array_ops; | |
53 | ||
54 | /** | |
55 | * to_fence_array - cast a fence to a fence_array | |
56 | * @fence: fence to cast to a fence_array | |
57 | * | |
58 | * Returns NULL if the fence is not a fence_array, | |
59 | * or the fence_array otherwise. | |
60 | */ | |
61 | static inline struct fence_array *to_fence_array(struct fence *fence) | |
62 | { | |
63 | if (fence->ops != &fence_array_ops) | |
64 | return NULL; | |
65 | ||
66 | return container_of(fence, struct fence_array, base); | |
67 | } | |
68 | ||
69 | struct fence_array *fence_array_create(int num_fences, struct fence **fences, | |
f7104568 CK |
70 | u64 context, unsigned seqno, |
71 | bool signal_on_any); | |
b3dfbdf2 GP |
72 | |
73 | #endif /* __LINUX_FENCE_ARRAY_H */ |