Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 1 | /* |
| 2 | * include/linux/sync.h |
| 3 | * |
| 4 | * Copyright (C) 2012 Google, Inc. |
| 5 | * |
| 6 | * This program is distributed in the hope that it will be useful, |
| 7 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 8 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 9 | * GNU General Public License for more details. |
| 10 | * |
| 11 | */ |
| 12 | |
| 13 | #ifndef _LINUX_SYNC_H |
| 14 | #define _LINUX_SYNC_H |
| 15 | |
| 16 | #include <linux/types.h> |
Erik Gilling | 0154417 | 2013-02-28 16:43:10 -0800 | [diff] [blame] | 17 | #include <linux/kref.h> |
Erik Gilling | 97a8484 | 2013-02-28 16:42:59 -0800 | [diff] [blame] | 18 | #include <linux/ktime.h> |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 19 | #include <linux/list.h> |
| 20 | #include <linux/spinlock.h> |
| 21 | #include <linux/wait.h> |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 22 | #include <linux/fence.h> |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 23 | |
Colin Cross | 64907b9 | 2014-02-17 13:58:32 -0800 | [diff] [blame] | 24 | #include "uapi/sync.h" |
| 25 | |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 26 | struct sync_timeline; |
Gustavo Padovan | d7fdb0a | 2016-01-21 10:49:19 -0200 | [diff] [blame] | 27 | struct sync_file; |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 28 | |
| 29 | /** |
| 30 | * struct sync_timeline_ops - sync object implementation ops |
Masanari Iida | 4e20eff | 2013-10-31 14:20:25 +0900 | [diff] [blame] | 31 | * @driver_name: name of the implementation |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 32 | * @has_signaled: returns: |
| 33 | * 1 if pt has signaled |
| 34 | * 0 if pt has not signaled |
| 35 | * <0 on error |
Masanari Iida | 4e20eff | 2013-10-31 14:20:25 +0900 | [diff] [blame] | 36 | * @fill_driver_data: write implementation specific driver data to data. |
Erik Gilling | 79ba152 | 2013-02-28 16:43:02 -0800 | [diff] [blame] | 37 | * should return an error if there is not enough room |
| 38 | * as specified by size. This information is returned |
| 39 | * to userspace by SYNC_IOC_FENCE_INFO. |
Erik Gilling | dbd5239 | 2013-02-28 16:43:21 -0800 | [diff] [blame] | 40 | * @timeline_value_str: fill str with the value of the sync_timeline's counter |
Gustavo Padovan | b55b54b | 2016-01-21 10:49:21 -0200 | [diff] [blame^] | 41 | * @fence_value_str: fill str with the value of the fence |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 42 | */ |
| 43 | struct sync_timeline_ops { |
| 44 | const char *driver_name; |
| 45 | |
| 46 | /* required */ |
Gustavo Padovan | b55b54b | 2016-01-21 10:49:21 -0200 | [diff] [blame^] | 47 | int (*has_signaled)(struct fence *fence); |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 48 | |
Erik Gilling | 79ba152 | 2013-02-28 16:43:02 -0800 | [diff] [blame] | 49 | /* optional */ |
Gustavo Padovan | b55b54b | 2016-01-21 10:49:21 -0200 | [diff] [blame^] | 50 | int (*fill_driver_data)(struct fence *fence, void *data, int size); |
Erik Gilling | dbd5239 | 2013-02-28 16:43:21 -0800 | [diff] [blame] | 51 | |
| 52 | /* optional */ |
| 53 | void (*timeline_value_str)(struct sync_timeline *timeline, char *str, |
| 54 | int size); |
| 55 | |
| 56 | /* optional */ |
Gustavo Padovan | b55b54b | 2016-01-21 10:49:21 -0200 | [diff] [blame^] | 57 | void (*fence_value_str)(struct fence *fence, char *str, int size); |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 58 | }; |
| 59 | |
| 60 | /** |
| 61 | * struct sync_timeline - sync object |
Erik Gilling | c5b86b7 | 2013-02-28 16:43:11 -0800 | [diff] [blame] | 62 | * @kref: reference count on fence. |
Masanari Iida | 4e20eff | 2013-10-31 14:20:25 +0900 | [diff] [blame] | 63 | * @ops: ops that define the implementation of the sync_timeline |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 64 | * @name: name of the sync_timeline. Useful for debugging |
Masanari Iida | 4e20eff | 2013-10-31 14:20:25 +0900 | [diff] [blame] | 65 | * @destroyed: set when sync_timeline is destroyed |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 66 | * @child_list_head: list of children sync_pts for this sync_timeline |
| 67 | * @child_list_lock: lock protecting @child_list_head, destroyed, and |
Gustavo Padovan | b55b54b | 2016-01-21 10:49:21 -0200 | [diff] [blame^] | 68 | * fence.status |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 69 | * @active_list_head: list of active (unsignaled/errored) sync_pts |
Erik Gilling | af7582f | 2013-02-28 16:43:00 -0800 | [diff] [blame] | 70 | * @sync_timeline_list: membership in global sync_timeline_list |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 71 | */ |
| 72 | struct sync_timeline { |
Erik Gilling | c5b86b7 | 2013-02-28 16:43:11 -0800 | [diff] [blame] | 73 | struct kref kref; |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 74 | const struct sync_timeline_ops *ops; |
| 75 | char name[32]; |
| 76 | |
| 77 | /* protected by child_list_lock */ |
| 78 | bool destroyed; |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 79 | int context, value; |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 80 | |
| 81 | struct list_head child_list_head; |
| 82 | spinlock_t child_list_lock; |
| 83 | |
| 84 | struct list_head active_list_head; |
Erik Gilling | af7582f | 2013-02-28 16:43:00 -0800 | [diff] [blame] | 85 | |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 86 | #ifdef CONFIG_DEBUG_FS |
Erik Gilling | af7582f | 2013-02-28 16:43:00 -0800 | [diff] [blame] | 87 | struct list_head sync_timeline_list; |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 88 | #endif |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 89 | }; |
| 90 | |
Gustavo Padovan | b55b54b | 2016-01-21 10:49:21 -0200 | [diff] [blame^] | 91 | static inline struct sync_timeline *fence_parent(struct fence *fence) |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 92 | { |
Gustavo Padovan | b55b54b | 2016-01-21 10:49:21 -0200 | [diff] [blame^] | 93 | return container_of(fence->lock, struct sync_timeline, |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 94 | child_list_lock); |
| 95 | } |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 96 | |
Gustavo Padovan | d7fdb0a | 2016-01-21 10:49:19 -0200 | [diff] [blame] | 97 | struct sync_file_cb { |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 98 | struct fence_cb cb; |
Gustavo Padovan | c88b26d | 2016-01-21 10:49:20 -0200 | [diff] [blame] | 99 | struct fence *fence; |
Gustavo Padovan | d7fdb0a | 2016-01-21 10:49:19 -0200 | [diff] [blame] | 100 | struct sync_file *sync_file; |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 101 | }; |
| 102 | |
| 103 | /** |
Gustavo Padovan | d7fdb0a | 2016-01-21 10:49:19 -0200 | [diff] [blame] | 104 | * struct sync_file - sync file to export to the userspace |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 105 | * @file: file representing this fence |
Masanari Iida | 4e20eff | 2013-10-31 14:20:25 +0900 | [diff] [blame] | 106 | * @kref: reference count on fence. |
Gustavo Padovan | d7fdb0a | 2016-01-21 10:49:19 -0200 | [diff] [blame] | 107 | * @name: name of sync_file. Useful for debugging |
| 108 | * @sync_file_list: membership in global file list |
Gustavo Padovan | 9b32381 | 2016-01-21 10:49:14 -0200 | [diff] [blame] | 109 | * @num_fences number of sync_pts in the fence |
| 110 | * @wq: wait queue for fence signaling |
| 111 | * @status: 0: signaled, >0:active, <0: error |
| 112 | * @cbs: sync_pts callback information |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 113 | */ |
Gustavo Padovan | d7fdb0a | 2016-01-21 10:49:19 -0200 | [diff] [blame] | 114 | struct sync_file { |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 115 | struct file *file; |
Erik Gilling | 0154417 | 2013-02-28 16:43:10 -0800 | [diff] [blame] | 116 | struct kref kref; |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 117 | char name[32]; |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 118 | #ifdef CONFIG_DEBUG_FS |
Gustavo Padovan | d7fdb0a | 2016-01-21 10:49:19 -0200 | [diff] [blame] | 119 | struct list_head sync_file_list; |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 120 | #endif |
| 121 | int num_fences; |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 122 | |
| 123 | wait_queue_head_t wq; |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 124 | atomic_t status; |
Erik Gilling | af7582f | 2013-02-28 16:43:00 -0800 | [diff] [blame] | 125 | |
Gustavo Padovan | d7fdb0a | 2016-01-21 10:49:19 -0200 | [diff] [blame] | 126 | struct sync_file_cb cbs[]; |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 127 | }; |
| 128 | |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 129 | /* |
| 130 | * API for sync_timeline implementers |
| 131 | */ |
| 132 | |
| 133 | /** |
| 134 | * sync_timeline_create() - creates a sync object |
Masanari Iida | 4e20eff | 2013-10-31 14:20:25 +0900 | [diff] [blame] | 135 | * @ops: specifies the implementation ops for the object |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 136 | * @size: size to allocate for this obj |
| 137 | * @name: sync_timeline name |
| 138 | * |
Masanari Iida | 4e20eff | 2013-10-31 14:20:25 +0900 | [diff] [blame] | 139 | * Creates a new sync_timeline which will use the implementation specified by |
| 140 | * @ops. @size bytes will be allocated allowing for implementation specific |
Gustavo Padovan | 9b32381 | 2016-01-21 10:49:14 -0200 | [diff] [blame] | 141 | * data to be kept after the generic sync_timeline struct. Returns the |
| 142 | * sync_timeline object or NULL in case of error. |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 143 | */ |
| 144 | struct sync_timeline *sync_timeline_create(const struct sync_timeline_ops *ops, |
| 145 | int size, const char *name); |
| 146 | |
| 147 | /** |
Masanari Iida | 4e20eff | 2013-10-31 14:20:25 +0900 | [diff] [blame] | 148 | * sync_timeline_destroy() - destroys a sync object |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 149 | * @obj: sync_timeline to destroy |
| 150 | * |
Masanari Iida | 4e20eff | 2013-10-31 14:20:25 +0900 | [diff] [blame] | 151 | * A sync implementation should call this when the @obj is going away |
| 152 | * (i.e. module unload.) @obj won't actually be freed until all its children |
Gustavo Padovan | b55b54b | 2016-01-21 10:49:21 -0200 | [diff] [blame^] | 153 | * fences are freed. |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 154 | */ |
| 155 | void sync_timeline_destroy(struct sync_timeline *obj); |
| 156 | |
| 157 | /** |
| 158 | * sync_timeline_signal() - signal a status change on a sync_timeline |
| 159 | * @obj: sync_timeline to signal |
| 160 | * |
Gustavo Padovan | b55b54b | 2016-01-21 10:49:21 -0200 | [diff] [blame^] | 161 | * A sync implementation should call this any time one of it's fences |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 162 | * has signaled or has an error condition. |
| 163 | */ |
| 164 | void sync_timeline_signal(struct sync_timeline *obj); |
| 165 | |
| 166 | /** |
| 167 | * sync_pt_create() - creates a sync pt |
Gustavo Padovan | b55b54b | 2016-01-21 10:49:21 -0200 | [diff] [blame^] | 168 | * @parent: fence's parent sync_timeline |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 169 | * @size: size to allocate for this pt |
| 170 | * |
Gustavo Padovan | b55b54b | 2016-01-21 10:49:21 -0200 | [diff] [blame^] | 171 | * Creates a new fence as a child of @parent. @size bytes will be |
Masanari Iida | 4e20eff | 2013-10-31 14:20:25 +0900 | [diff] [blame] | 172 | * allocated allowing for implementation specific data to be kept after |
Gustavo Padovan | b55b54b | 2016-01-21 10:49:21 -0200 | [diff] [blame^] | 173 | * the generic sync_timeline struct. Returns the fence object or |
Gustavo Padovan | 9b32381 | 2016-01-21 10:49:14 -0200 | [diff] [blame] | 174 | * NULL in case of error. |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 175 | */ |
Gustavo Padovan | b55b54b | 2016-01-21 10:49:21 -0200 | [diff] [blame^] | 176 | struct fence *sync_pt_create(struct sync_timeline *parent, int size); |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 177 | |
| 178 | /** |
Gustavo Padovan | b55b54b | 2016-01-21 10:49:21 -0200 | [diff] [blame^] | 179 | * sync_fence_create() - creates a sync fence |
| 180 | * @name: name of fence to create |
| 181 | * @fence: fence to add to the sync_fence |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 182 | * |
Gustavo Padovan | b55b54b | 2016-01-21 10:49:21 -0200 | [diff] [blame^] | 183 | * Creates a sync_file containg @fence. Once this is called, the sync_file |
| 184 | * takes ownership of @fence. |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 185 | */ |
Gustavo Padovan | b55b54b | 2016-01-21 10:49:21 -0200 | [diff] [blame^] | 186 | struct sync_file *sync_file_create(const char *name, struct fence *fence); |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 187 | |
Maarten Lankhorst | 0f477c6 | 2015-12-11 13:11:50 +0000 | [diff] [blame] | 188 | /** |
Gustavo Padovan | d7fdb0a | 2016-01-21 10:49:19 -0200 | [diff] [blame] | 189 | * sync_file_create_dma() - creates a sync file from dma-fence |
| 190 | * @name: name of file to create |
| 191 | * @pt: dma-fence to add to the file |
Maarten Lankhorst | 0f477c6 | 2015-12-11 13:11:50 +0000 | [diff] [blame] | 192 | * |
Gustavo Padovan | d7fdb0a | 2016-01-21 10:49:19 -0200 | [diff] [blame] | 193 | * Creates a sync_file containg @pt. Once this is called, the fence takes |
Maarten Lankhorst | 0f477c6 | 2015-12-11 13:11:50 +0000 | [diff] [blame] | 194 | * ownership of @pt. |
| 195 | */ |
Gustavo Padovan | d7fdb0a | 2016-01-21 10:49:19 -0200 | [diff] [blame] | 196 | struct sync_file *sync_file_create_dma(const char *name, struct fence *pt); |
Maarten Lankhorst | 0f477c6 | 2015-12-11 13:11:50 +0000 | [diff] [blame] | 197 | |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 198 | /* |
Gustavo Padovan | d7fdb0a | 2016-01-21 10:49:19 -0200 | [diff] [blame] | 199 | * API for sync_file consumers |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 200 | */ |
| 201 | |
| 202 | /** |
Gustavo Padovan | d7fdb0a | 2016-01-21 10:49:19 -0200 | [diff] [blame] | 203 | * sync_file_merge() - merge two sync_files |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 204 | * @name: name of new fence |
Gustavo Padovan | d7fdb0a | 2016-01-21 10:49:19 -0200 | [diff] [blame] | 205 | * @a: sync_file a |
| 206 | * @b: sync_file b |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 207 | * |
Gustavo Padovan | b55b54b | 2016-01-21 10:49:21 -0200 | [diff] [blame^] | 208 | * Creates a new sync_file which contains copies of all the fences in both |
Gustavo Padovan | d7fdb0a | 2016-01-21 10:49:19 -0200 | [diff] [blame] | 209 | * @a and @b. @a and @b remain valid, independent sync_file. Returns the |
| 210 | * new merged sync_file or NULL in case of error. |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 211 | */ |
Gustavo Padovan | d7fdb0a | 2016-01-21 10:49:19 -0200 | [diff] [blame] | 212 | struct sync_file *sync_file_merge(const char *name, |
| 213 | struct sync_file *a, struct sync_file *b); |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 214 | |
| 215 | /** |
Gustavo Padovan | d7fdb0a | 2016-01-21 10:49:19 -0200 | [diff] [blame] | 216 | * sync_file_fdget() - get a sync_file from an fd |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 217 | * @fd: fd referencing a fence |
| 218 | * |
Gustavo Padovan | d7fdb0a | 2016-01-21 10:49:19 -0200 | [diff] [blame] | 219 | * Ensures @fd references a valid sync_file, increments the refcount of the |
| 220 | * backing file. Returns the sync_file or NULL in case of error. |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 221 | */ |
Gustavo Padovan | d7fdb0a | 2016-01-21 10:49:19 -0200 | [diff] [blame] | 222 | struct sync_file *sync_file_fdget(int fd); |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 223 | |
| 224 | /** |
Gustavo Padovan | d7fdb0a | 2016-01-21 10:49:19 -0200 | [diff] [blame] | 225 | * sync_file_put() - puts a reference of a sync_file |
| 226 | * @sync_file: sync_file to put |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 227 | * |
Gustavo Padovan | d7fdb0a | 2016-01-21 10:49:19 -0200 | [diff] [blame] | 228 | * Puts a reference on @sync_fence. If this is the last reference, the |
| 229 | * sync_fil and all it's sync_pts will be freed |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 230 | */ |
Gustavo Padovan | d7fdb0a | 2016-01-21 10:49:19 -0200 | [diff] [blame] | 231 | void sync_file_put(struct sync_file *sync_file); |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 232 | |
| 233 | /** |
Gustavo Padovan | d7fdb0a | 2016-01-21 10:49:19 -0200 | [diff] [blame] | 234 | * sync_file_install() - installs a sync_file into a file descriptor |
| 235 | * @sync_file: sync_file to install |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 236 | * @fd: file descriptor in which to install the fence |
| 237 | * |
Gustavo Padovan | d7fdb0a | 2016-01-21 10:49:19 -0200 | [diff] [blame] | 238 | * Installs @sync_file into @fd. @fd's should be acquired through |
Heinrich Schuchardt | ae66475 | 2014-09-27 10:52:37 +0200 | [diff] [blame] | 239 | * get_unused_fd_flags(O_CLOEXEC). |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 240 | */ |
Gustavo Padovan | d7fdb0a | 2016-01-21 10:49:19 -0200 | [diff] [blame] | 241 | void sync_file_install(struct sync_file *sync_file, int fd); |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 242 | |
| 243 | /** |
Gustavo Padovan | d7fdb0a | 2016-01-21 10:49:19 -0200 | [diff] [blame] | 244 | * sync_file_wait() - wait on sync file |
| 245 | * @sync_file: file to wait on |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 246 | * @tiemout: timeout in ms |
| 247 | * |
Gustavo Padovan | d7fdb0a | 2016-01-21 10:49:19 -0200 | [diff] [blame] | 248 | * Wait for @sync_file to be signaled or have an error. Waits indefinitely |
Gustavo Padovan | 9b32381 | 2016-01-21 10:49:14 -0200 | [diff] [blame] | 249 | * if @timeout < 0. |
| 250 | * |
| 251 | * Returns 0 if fence signaled, > 0 if it is still active and <0 on error |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 252 | */ |
Gustavo Padovan | d7fdb0a | 2016-01-21 10:49:19 -0200 | [diff] [blame] | 253 | int sync_file_wait(struct sync_file *sync_file, long timeout); |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 254 | |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 255 | #ifdef CONFIG_DEBUG_FS |
| 256 | |
Joe Perches | d30649a | 2015-08-10 14:51:16 -0700 | [diff] [blame] | 257 | void sync_timeline_debug_add(struct sync_timeline *obj); |
| 258 | void sync_timeline_debug_remove(struct sync_timeline *obj); |
Gustavo Padovan | d7fdb0a | 2016-01-21 10:49:19 -0200 | [diff] [blame] | 259 | void sync_file_debug_add(struct sync_file *fence); |
| 260 | void sync_file_debug_remove(struct sync_file *fence); |
Joe Perches | d30649a | 2015-08-10 14:51:16 -0700 | [diff] [blame] | 261 | void sync_dump(void); |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 262 | |
| 263 | #else |
| 264 | # define sync_timeline_debug_add(obj) |
| 265 | # define sync_timeline_debug_remove(obj) |
Gustavo Padovan | d7fdb0a | 2016-01-21 10:49:19 -0200 | [diff] [blame] | 266 | # define sync_file_debug_add(fence) |
| 267 | # define sync_file_debug_remove(fence) |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 268 | # define sync_dump() |
| 269 | #endif |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 270 | |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 271 | #endif /* _LINUX_SYNC_H */ |