projects / mirror_ubuntu-zesty-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| b3dfbdf2 GP |
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 */ |