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; |
| 27 | struct sync_pt; |
Gustavo Padovan | d7fdb0a | 2016-01-21 10:49:19 -0200 | [diff] [blame] | 28 | struct sync_file; |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 29 | |
| 30 | /** |
| 31 | * struct sync_timeline_ops - sync object implementation ops |
Masanari Iida | 4e20eff | 2013-10-31 14:20:25 +0900 | [diff] [blame] | 32 | * @driver_name: name of the implementation |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 33 | * @has_signaled: returns: |
| 34 | * 1 if pt has signaled |
| 35 | * 0 if pt has not signaled |
| 36 | * <0 on error |
Masanari Iida | 4e20eff | 2013-10-31 14:20:25 +0900 | [diff] [blame] | 37 | * @fill_driver_data: write implementation specific driver data to data. |
Erik Gilling | 79ba152 | 2013-02-28 16:43:02 -0800 | [diff] [blame] | 38 | * should return an error if there is not enough room |
| 39 | * as specified by size. This information is returned |
| 40 | * to userspace by SYNC_IOC_FENCE_INFO. |
Erik Gilling | dbd5239 | 2013-02-28 16:43:21 -0800 | [diff] [blame] | 41 | * @timeline_value_str: fill str with the value of the sync_timeline's counter |
| 42 | * @pt_value_str: fill str with the value of the sync_pt |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 43 | */ |
| 44 | struct sync_timeline_ops { |
| 45 | const char *driver_name; |
| 46 | |
| 47 | /* required */ |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 48 | int (*has_signaled)(struct sync_pt *pt); |
| 49 | |
Erik Gilling | 79ba152 | 2013-02-28 16:43:02 -0800 | [diff] [blame] | 50 | /* optional */ |
| 51 | int (*fill_driver_data)(struct sync_pt *syncpt, void *data, int size); |
Erik Gilling | dbd5239 | 2013-02-28 16:43:21 -0800 | [diff] [blame] | 52 | |
| 53 | /* optional */ |
| 54 | void (*timeline_value_str)(struct sync_timeline *timeline, char *str, |
| 55 | int size); |
| 56 | |
| 57 | /* optional */ |
| 58 | void (*pt_value_str)(struct sync_pt *pt, char *str, int size); |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 59 | }; |
| 60 | |
| 61 | /** |
| 62 | * struct sync_timeline - sync object |
Erik Gilling | c5b86b7 | 2013-02-28 16:43:11 -0800 | [diff] [blame] | 63 | * @kref: reference count on fence. |
Masanari Iida | 4e20eff | 2013-10-31 14:20:25 +0900 | [diff] [blame] | 64 | * @ops: ops that define the implementation of the sync_timeline |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 65 | * @name: name of the sync_timeline. Useful for debugging |
Masanari Iida | 4e20eff | 2013-10-31 14:20:25 +0900 | [diff] [blame] | 66 | * @destroyed: set when sync_timeline is destroyed |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 67 | * @child_list_head: list of children sync_pts for this sync_timeline |
| 68 | * @child_list_lock: lock protecting @child_list_head, destroyed, and |
| 69 | * sync_pt.status |
| 70 | * @active_list_head: list of active (unsignaled/errored) sync_pts |
Erik Gilling | af7582f | 2013-02-28 16:43:00 -0800 | [diff] [blame] | 71 | * @sync_timeline_list: membership in global sync_timeline_list |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 72 | */ |
| 73 | struct sync_timeline { |
Erik Gilling | c5b86b7 | 2013-02-28 16:43:11 -0800 | [diff] [blame] | 74 | struct kref kref; |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 75 | const struct sync_timeline_ops *ops; |
| 76 | char name[32]; |
| 77 | |
| 78 | /* protected by child_list_lock */ |
| 79 | bool destroyed; |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 80 | int context, value; |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 81 | |
| 82 | struct list_head child_list_head; |
| 83 | spinlock_t child_list_lock; |
| 84 | |
| 85 | struct list_head active_list_head; |
Erik Gilling | af7582f | 2013-02-28 16:43:00 -0800 | [diff] [blame] | 86 | |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 87 | #ifdef CONFIG_DEBUG_FS |
Erik Gilling | af7582f | 2013-02-28 16:43:00 -0800 | [diff] [blame] | 88 | struct list_head sync_timeline_list; |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 89 | #endif |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 90 | }; |
| 91 | |
| 92 | /** |
| 93 | * struct sync_pt - sync point |
Gustavo Padovan | 9b32381 | 2016-01-21 10:49:14 -0200 | [diff] [blame] | 94 | * @base: base fence class |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 95 | * @child_list: membership in sync_timeline.child_list_head |
| 96 | * @active_list: membership in sync_timeline.active_list_head |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 97 | */ |
| 98 | struct sync_pt { |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 99 | struct fence base; |
| 100 | |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 101 | struct list_head child_list; |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 102 | struct list_head active_list; |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 103 | }; |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 104 | |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 105 | static inline struct sync_timeline *sync_pt_parent(struct sync_pt *pt) |
| 106 | { |
| 107 | return container_of(pt->base.lock, struct sync_timeline, |
| 108 | child_list_lock); |
| 109 | } |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 110 | |
Gustavo Padovan | d7fdb0a | 2016-01-21 10:49:19 -0200 | [diff] [blame] | 111 | struct sync_file_cb { |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 112 | struct fence_cb cb; |
Gustavo Padovan | c88b26d | 2016-01-21 10:49:20 -0200 | [diff] [blame^] | 113 | struct fence *fence; |
Gustavo Padovan | d7fdb0a | 2016-01-21 10:49:19 -0200 | [diff] [blame] | 114 | struct sync_file *sync_file; |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 115 | }; |
| 116 | |
| 117 | /** |
Gustavo Padovan | d7fdb0a | 2016-01-21 10:49:19 -0200 | [diff] [blame] | 118 | * struct sync_file - sync file to export to the userspace |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 119 | * @file: file representing this fence |
Masanari Iida | 4e20eff | 2013-10-31 14:20:25 +0900 | [diff] [blame] | 120 | * @kref: reference count on fence. |
Gustavo Padovan | d7fdb0a | 2016-01-21 10:49:19 -0200 | [diff] [blame] | 121 | * @name: name of sync_file. Useful for debugging |
| 122 | * @sync_file_list: membership in global file list |
Gustavo Padovan | 9b32381 | 2016-01-21 10:49:14 -0200 | [diff] [blame] | 123 | * @num_fences number of sync_pts in the fence |
| 124 | * @wq: wait queue for fence signaling |
| 125 | * @status: 0: signaled, >0:active, <0: error |
| 126 | * @cbs: sync_pts callback information |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 127 | */ |
Gustavo Padovan | d7fdb0a | 2016-01-21 10:49:19 -0200 | [diff] [blame] | 128 | struct sync_file { |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 129 | struct file *file; |
Erik Gilling | 0154417 | 2013-02-28 16:43:10 -0800 | [diff] [blame] | 130 | struct kref kref; |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 131 | char name[32]; |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 132 | #ifdef CONFIG_DEBUG_FS |
Gustavo Padovan | d7fdb0a | 2016-01-21 10:49:19 -0200 | [diff] [blame] | 133 | struct list_head sync_file_list; |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 134 | #endif |
| 135 | int num_fences; |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 136 | |
| 137 | wait_queue_head_t wq; |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 138 | atomic_t status; |
Erik Gilling | af7582f | 2013-02-28 16:43:00 -0800 | [diff] [blame] | 139 | |
Gustavo Padovan | d7fdb0a | 2016-01-21 10:49:19 -0200 | [diff] [blame] | 140 | struct sync_file_cb cbs[]; |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 141 | }; |
| 142 | |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 143 | /* |
| 144 | * API for sync_timeline implementers |
| 145 | */ |
| 146 | |
| 147 | /** |
| 148 | * sync_timeline_create() - creates a sync object |
Masanari Iida | 4e20eff | 2013-10-31 14:20:25 +0900 | [diff] [blame] | 149 | * @ops: specifies the implementation ops for the object |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 150 | * @size: size to allocate for this obj |
| 151 | * @name: sync_timeline name |
| 152 | * |
Masanari Iida | 4e20eff | 2013-10-31 14:20:25 +0900 | [diff] [blame] | 153 | * Creates a new sync_timeline which will use the implementation specified by |
| 154 | * @ops. @size bytes will be allocated allowing for implementation specific |
Gustavo Padovan | 9b32381 | 2016-01-21 10:49:14 -0200 | [diff] [blame] | 155 | * data to be kept after the generic sync_timeline struct. Returns the |
| 156 | * sync_timeline object or NULL in case of error. |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 157 | */ |
| 158 | struct sync_timeline *sync_timeline_create(const struct sync_timeline_ops *ops, |
| 159 | int size, const char *name); |
| 160 | |
| 161 | /** |
Masanari Iida | 4e20eff | 2013-10-31 14:20:25 +0900 | [diff] [blame] | 162 | * sync_timeline_destroy() - destroys a sync object |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 163 | * @obj: sync_timeline to destroy |
| 164 | * |
Masanari Iida | 4e20eff | 2013-10-31 14:20:25 +0900 | [diff] [blame] | 165 | * A sync implementation should call this when the @obj is going away |
| 166 | * (i.e. module unload.) @obj won't actually be freed until all its children |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 167 | * sync_pts are freed. |
| 168 | */ |
| 169 | void sync_timeline_destroy(struct sync_timeline *obj); |
| 170 | |
| 171 | /** |
| 172 | * sync_timeline_signal() - signal a status change on a sync_timeline |
| 173 | * @obj: sync_timeline to signal |
| 174 | * |
Masanari Iida | 4e20eff | 2013-10-31 14:20:25 +0900 | [diff] [blame] | 175 | * A sync implementation should call this any time one of it's sync_pts |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 176 | * has signaled or has an error condition. |
| 177 | */ |
| 178 | void sync_timeline_signal(struct sync_timeline *obj); |
| 179 | |
| 180 | /** |
| 181 | * sync_pt_create() - creates a sync pt |
| 182 | * @parent: sync_pt's parent sync_timeline |
| 183 | * @size: size to allocate for this pt |
| 184 | * |
Masanari Iida | 4e20eff | 2013-10-31 14:20:25 +0900 | [diff] [blame] | 185 | * Creates a new sync_pt as a child of @parent. @size bytes will be |
| 186 | * allocated allowing for implementation specific data to be kept after |
Gustavo Padovan | 9b32381 | 2016-01-21 10:49:14 -0200 | [diff] [blame] | 187 | * the generic sync_timeline struct. Returns the sync_pt object or |
| 188 | * NULL in case of error. |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 189 | */ |
| 190 | struct sync_pt *sync_pt_create(struct sync_timeline *parent, int size); |
| 191 | |
| 192 | /** |
| 193 | * sync_pt_free() - frees a sync pt |
| 194 | * @pt: sync_pt to free |
| 195 | * |
| 196 | * This should only be called on sync_pts which have been created but |
| 197 | * not added to a fence. |
| 198 | */ |
| 199 | void sync_pt_free(struct sync_pt *pt); |
| 200 | |
| 201 | /** |
Gustavo Padovan | d7fdb0a | 2016-01-21 10:49:19 -0200 | [diff] [blame] | 202 | * sync_file_create() - creates a sync file |
| 203 | * @name: name of file to create |
| 204 | * @pt: sync_pt to add to the file |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 205 | * |
Gustavo Padovan | d7fdb0a | 2016-01-21 10:49:19 -0200 | [diff] [blame] | 206 | * Creates a sync_file containg @pt. Once this is called, the sync_file takes |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 207 | * ownership of @pt. |
| 208 | */ |
Gustavo Padovan | d7fdb0a | 2016-01-21 10:49:19 -0200 | [diff] [blame] | 209 | struct sync_file *sync_file_create(const char *name, struct sync_pt *pt); |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 210 | |
Maarten Lankhorst | 0f477c6 | 2015-12-11 13:11:50 +0000 | [diff] [blame] | 211 | /** |
Gustavo Padovan | d7fdb0a | 2016-01-21 10:49:19 -0200 | [diff] [blame] | 212 | * sync_file_create_dma() - creates a sync file from dma-fence |
| 213 | * @name: name of file to create |
| 214 | * @pt: dma-fence to add to the file |
Maarten Lankhorst | 0f477c6 | 2015-12-11 13:11:50 +0000 | [diff] [blame] | 215 | * |
Gustavo Padovan | d7fdb0a | 2016-01-21 10:49:19 -0200 | [diff] [blame] | 216 | * 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] | 217 | * ownership of @pt. |
| 218 | */ |
Gustavo Padovan | d7fdb0a | 2016-01-21 10:49:19 -0200 | [diff] [blame] | 219 | 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] | 220 | |
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 | * API for sync_file consumers |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 223 | */ |
| 224 | |
| 225 | /** |
Gustavo Padovan | d7fdb0a | 2016-01-21 10:49:19 -0200 | [diff] [blame] | 226 | * sync_file_merge() - merge two sync_files |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 227 | * @name: name of new fence |
Gustavo Padovan | d7fdb0a | 2016-01-21 10:49:19 -0200 | [diff] [blame] | 228 | * @a: sync_file a |
| 229 | * @b: sync_file b |
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 | * Creates a new sync_file which contains copies of all the sync_pts in both |
| 232 | * @a and @b. @a and @b remain valid, independent sync_file. Returns the |
| 233 | * new merged sync_file or NULL in case of error. |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 234 | */ |
Gustavo Padovan | d7fdb0a | 2016-01-21 10:49:19 -0200 | [diff] [blame] | 235 | struct sync_file *sync_file_merge(const char *name, |
| 236 | struct sync_file *a, struct sync_file *b); |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 237 | |
| 238 | /** |
Gustavo Padovan | d7fdb0a | 2016-01-21 10:49:19 -0200 | [diff] [blame] | 239 | * sync_file_fdget() - get a sync_file from an fd |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 240 | * @fd: fd referencing a fence |
| 241 | * |
Gustavo Padovan | d7fdb0a | 2016-01-21 10:49:19 -0200 | [diff] [blame] | 242 | * Ensures @fd references a valid sync_file, increments the refcount of the |
| 243 | * backing file. Returns the sync_file or NULL in case of error. |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 244 | */ |
Gustavo Padovan | d7fdb0a | 2016-01-21 10:49:19 -0200 | [diff] [blame] | 245 | struct sync_file *sync_file_fdget(int fd); |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 246 | |
| 247 | /** |
Gustavo Padovan | d7fdb0a | 2016-01-21 10:49:19 -0200 | [diff] [blame] | 248 | * sync_file_put() - puts a reference of a sync_file |
| 249 | * @sync_file: sync_file to put |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 250 | * |
Gustavo Padovan | d7fdb0a | 2016-01-21 10:49:19 -0200 | [diff] [blame] | 251 | * Puts a reference on @sync_fence. If this is the last reference, the |
| 252 | * sync_fil and all it's sync_pts will be freed |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 253 | */ |
Gustavo Padovan | d7fdb0a | 2016-01-21 10:49:19 -0200 | [diff] [blame] | 254 | void sync_file_put(struct sync_file *sync_file); |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 255 | |
| 256 | /** |
Gustavo Padovan | d7fdb0a | 2016-01-21 10:49:19 -0200 | [diff] [blame] | 257 | * sync_file_install() - installs a sync_file into a file descriptor |
| 258 | * @sync_file: sync_file to install |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 259 | * @fd: file descriptor in which to install the fence |
| 260 | * |
Gustavo Padovan | d7fdb0a | 2016-01-21 10:49:19 -0200 | [diff] [blame] | 261 | * Installs @sync_file into @fd. @fd's should be acquired through |
Heinrich Schuchardt | ae66475 | 2014-09-27 10:52:37 +0200 | [diff] [blame] | 262 | * get_unused_fd_flags(O_CLOEXEC). |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 263 | */ |
Gustavo Padovan | d7fdb0a | 2016-01-21 10:49:19 -0200 | [diff] [blame] | 264 | void sync_file_install(struct sync_file *sync_file, int fd); |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 265 | |
| 266 | /** |
Gustavo Padovan | d7fdb0a | 2016-01-21 10:49:19 -0200 | [diff] [blame] | 267 | * sync_file_wait() - wait on sync file |
| 268 | * @sync_file: file to wait on |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 269 | * @tiemout: timeout in ms |
| 270 | * |
Gustavo Padovan | d7fdb0a | 2016-01-21 10:49:19 -0200 | [diff] [blame] | 271 | * 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] | 272 | * if @timeout < 0. |
| 273 | * |
| 274 | * 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] | 275 | */ |
Gustavo Padovan | d7fdb0a | 2016-01-21 10:49:19 -0200 | [diff] [blame] | 276 | int sync_file_wait(struct sync_file *sync_file, long timeout); |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 277 | |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 278 | #ifdef CONFIG_DEBUG_FS |
| 279 | |
Joe Perches | d30649a | 2015-08-10 14:51:16 -0700 | [diff] [blame] | 280 | void sync_timeline_debug_add(struct sync_timeline *obj); |
| 281 | void sync_timeline_debug_remove(struct sync_timeline *obj); |
Gustavo Padovan | d7fdb0a | 2016-01-21 10:49:19 -0200 | [diff] [blame] | 282 | void sync_file_debug_add(struct sync_file *fence); |
| 283 | void sync_file_debug_remove(struct sync_file *fence); |
Joe Perches | d30649a | 2015-08-10 14:51:16 -0700 | [diff] [blame] | 284 | void sync_dump(void); |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 285 | |
| 286 | #else |
| 287 | # define sync_timeline_debug_add(obj) |
| 288 | # define sync_timeline_debug_remove(obj) |
Gustavo Padovan | d7fdb0a | 2016-01-21 10:49:19 -0200 | [diff] [blame] | 289 | # define sync_file_debug_add(fence) |
| 290 | # define sync_file_debug_remove(fence) |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 291 | # define sync_dump() |
| 292 | #endif |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 293 | |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 294 | #endif /* _LINUX_SYNC_H */ |