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f54d1867 CW |
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_DMA_FENCE_ARRAY_H | |
21 | #define __LINUX_DMA_FENCE_ARRAY_H | |
22 | ||
23 | #include <linux/dma-fence.h> | |
03e4e0a9 | 24 | #include <linux/irq_work.h> |
f54d1867 CW |
25 | |
26 | /** | |
27 | * struct dma_fence_array_cb - callback helper for fence array | |
28 | * @cb: fence callback structure for signaling | |
29 | * @array: reference to the parent fence array object | |
30 | */ | |
31 | struct dma_fence_array_cb { | |
32 | struct dma_fence_cb cb; | |
33 | struct dma_fence_array *array; | |
34 | }; | |
35 | ||
36 | /** | |
37 | * struct dma_fence_array - fence to represent an array of fences | |
38 | * @base: fence base class | |
39 | * @lock: spinlock for fence handling | |
40 | * @num_fences: number of fences in the array | |
41 | * @num_pending: fences in the array still pending | |
42 | * @fences: array of the fences | |
3725cd09 | 43 | * @work: internal irq_work function |
f54d1867 CW |
44 | */ |
45 | struct dma_fence_array { | |
46 | struct dma_fence base; | |
47 | ||
48 | spinlock_t lock; | |
49 | unsigned num_fences; | |
50 | atomic_t num_pending; | |
51 | struct dma_fence **fences; | |
03e4e0a9 CW |
52 | |
53 | struct irq_work work; | |
f54d1867 CW |
54 | }; |
55 | ||
56 | extern const struct dma_fence_ops dma_fence_array_ops; | |
57 | ||
58 | /** | |
59 | * dma_fence_is_array - check if a fence is from the array subsclass | |
60 | * @fence: fence to test | |
61 | * | |
62 | * Return true if it is a dma_fence_array and false otherwise. | |
63 | */ | |
64 | static inline bool dma_fence_is_array(struct dma_fence *fence) | |
65 | { | |
66 | return fence->ops == &dma_fence_array_ops; | |
67 | } | |
68 | ||
69 | /** | |
70 | * to_dma_fence_array - cast a fence to a dma_fence_array | |
71 | * @fence: fence to cast to a dma_fence_array | |
72 | * | |
73 | * Returns NULL if the fence is not a dma_fence_array, | |
74 | * or the dma_fence_array otherwise. | |
75 | */ | |
76 | static inline struct dma_fence_array * | |
77 | to_dma_fence_array(struct dma_fence *fence) | |
78 | { | |
79 | if (fence->ops != &dma_fence_array_ops) | |
80 | return NULL; | |
81 | ||
82 | return container_of(fence, struct dma_fence_array, base); | |
83 | } | |
84 | ||
85 | struct dma_fence_array *dma_fence_array_create(int num_fences, | |
86 | struct dma_fence **fences, | |
87 | u64 context, unsigned seqno, | |
88 | bool signal_on_any); | |
89 | ||
d5b72a21 PZ |
90 | bool dma_fence_match_context(struct dma_fence *fence, u64 context); |
91 | ||
f54d1867 | 92 | #endif /* __LINUX_DMA_FENCE_ARRAY_H */ |