Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 1 | /* |
| 2 | * drivers/base/sync.c |
| 3 | * |
| 4 | * Copyright (C) 2012 Google, Inc. |
| 5 | * |
| 6 | * This software is licensed under the terms of the GNU General Public |
| 7 | * License version 2, as published by the Free Software Foundation, and |
| 8 | * may be copied, distributed, and modified under those terms. |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | * GNU General Public License for more details. |
| 14 | * |
| 15 | */ |
| 16 | |
Erik Gilling | af7582f | 2013-02-28 16:43:00 -0800 | [diff] [blame] | 17 | #include <linux/debugfs.h> |
Erik Gilling | 8edb4ad | 2013-02-28 16:43:06 -0800 | [diff] [blame] | 18 | #include <linux/export.h> |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 19 | #include <linux/file.h> |
| 20 | #include <linux/fs.h> |
| 21 | #include <linux/kernel.h> |
Erik Gilling | 57b505b | 2013-02-28 16:43:04 -0800 | [diff] [blame] | 22 | #include <linux/poll.h> |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 23 | #include <linux/sched.h> |
Erik Gilling | af7582f | 2013-02-28 16:43:00 -0800 | [diff] [blame] | 24 | #include <linux/seq_file.h> |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 25 | #include <linux/slab.h> |
| 26 | #include <linux/uaccess.h> |
| 27 | #include <linux/anon_inodes.h> |
| 28 | |
| 29 | #include "sync.h" |
| 30 | |
Erik Gilling | b699a64 | 2013-02-28 16:43:23 -0800 | [diff] [blame] | 31 | #define CREATE_TRACE_POINTS |
| 32 | #include "trace/sync.h" |
| 33 | |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 34 | static const struct fence_ops android_fence_ops; |
| 35 | static const struct file_operations sync_fence_fops; |
Erik Gilling | af7582f | 2013-02-28 16:43:00 -0800 | [diff] [blame] | 36 | |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 37 | struct sync_timeline *sync_timeline_create(const struct sync_timeline_ops *ops, |
| 38 | int size, const char *name) |
| 39 | { |
| 40 | struct sync_timeline *obj; |
| 41 | |
| 42 | if (size < sizeof(struct sync_timeline)) |
| 43 | return NULL; |
| 44 | |
| 45 | obj = kzalloc(size, GFP_KERNEL); |
| 46 | if (obj == NULL) |
| 47 | return NULL; |
| 48 | |
Erik Gilling | c5b86b7 | 2013-02-28 16:43:11 -0800 | [diff] [blame] | 49 | kref_init(&obj->kref); |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 50 | obj->ops = ops; |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 51 | obj->context = fence_context_alloc(1); |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 52 | strlcpy(obj->name, name, sizeof(obj->name)); |
| 53 | |
| 54 | INIT_LIST_HEAD(&obj->child_list_head); |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 55 | INIT_LIST_HEAD(&obj->active_list_head); |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 56 | spin_lock_init(&obj->child_list_lock); |
| 57 | |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 58 | sync_timeline_debug_add(obj); |
Erik Gilling | af7582f | 2013-02-28 16:43:00 -0800 | [diff] [blame] | 59 | |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 60 | return obj; |
| 61 | } |
Erik Gilling | 8edb4ad | 2013-02-28 16:43:06 -0800 | [diff] [blame] | 62 | EXPORT_SYMBOL(sync_timeline_create); |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 63 | |
Erik Gilling | c5b86b7 | 2013-02-28 16:43:11 -0800 | [diff] [blame] | 64 | static void sync_timeline_free(struct kref *kref) |
Erik Gilling | af7582f | 2013-02-28 16:43:00 -0800 | [diff] [blame] | 65 | { |
Erik Gilling | c5b86b7 | 2013-02-28 16:43:11 -0800 | [diff] [blame] | 66 | struct sync_timeline *obj = |
| 67 | container_of(kref, struct sync_timeline, kref); |
Erik Gilling | af7582f | 2013-02-28 16:43:00 -0800 | [diff] [blame] | 68 | |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 69 | sync_timeline_debug_remove(obj); |
Erik Gilling | af7582f | 2013-02-28 16:43:00 -0800 | [diff] [blame] | 70 | |
Alistair Strachan | 5cf045f | 2014-02-04 16:08:36 -0800 | [diff] [blame] | 71 | if (obj->ops->release_obj) |
| 72 | obj->ops->release_obj(obj); |
| 73 | |
Erik Gilling | af7582f | 2013-02-28 16:43:00 -0800 | [diff] [blame] | 74 | kfree(obj); |
| 75 | } |
| 76 | |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 77 | static void sync_timeline_get(struct sync_timeline *obj) |
| 78 | { |
| 79 | kref_get(&obj->kref); |
| 80 | } |
| 81 | |
| 82 | static void sync_timeline_put(struct sync_timeline *obj) |
| 83 | { |
| 84 | kref_put(&obj->kref, sync_timeline_free); |
| 85 | } |
| 86 | |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 87 | void sync_timeline_destroy(struct sync_timeline *obj) |
| 88 | { |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 89 | obj->destroyed = true; |
Niv Yehezkel | 2960660 | 2014-05-24 10:28:07 -0400 | [diff] [blame] | 90 | /* |
| 91 | * Ensure timeline is marked as destroyed before |
| 92 | * changing timeline's fences status. |
| 93 | */ |
Prakash Kamliya | ac5b705 | 2014-02-04 16:08:35 -0800 | [diff] [blame] | 94 | smp_wmb(); |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 95 | |
Erik Gilling | c5b86b7 | 2013-02-28 16:43:11 -0800 | [diff] [blame] | 96 | /* |
Prakash Kamliya | ac5b705 | 2014-02-04 16:08:35 -0800 | [diff] [blame] | 97 | * signal any children that their parent is going away. |
Erik Gilling | c5b86b7 | 2013-02-28 16:43:11 -0800 | [diff] [blame] | 98 | */ |
Prakash Kamliya | ac5b705 | 2014-02-04 16:08:35 -0800 | [diff] [blame] | 99 | sync_timeline_signal(obj); |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 100 | sync_timeline_put(obj); |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 101 | } |
Erik Gilling | 8edb4ad | 2013-02-28 16:43:06 -0800 | [diff] [blame] | 102 | EXPORT_SYMBOL(sync_timeline_destroy); |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 103 | |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 104 | void sync_timeline_signal(struct sync_timeline *obj) |
| 105 | { |
| 106 | unsigned long flags; |
| 107 | LIST_HEAD(signaled_pts); |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 108 | struct sync_pt *pt, *next; |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 109 | |
Erik Gilling | b699a64 | 2013-02-28 16:43:23 -0800 | [diff] [blame] | 110 | trace_sync_timeline(obj); |
| 111 | |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 112 | spin_lock_irqsave(&obj->child_list_lock, flags); |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 113 | |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 114 | list_for_each_entry_safe(pt, next, &obj->active_list_head, |
| 115 | active_list) { |
| 116 | if (fence_is_signaled_locked(&pt->base)) |
Alistair Strachan | 8e43c9c | 2015-03-24 14:51:31 -0700 | [diff] [blame] | 117 | list_del_init(&pt->active_list); |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 118 | } |
| 119 | |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 120 | spin_unlock_irqrestore(&obj->child_list_lock, flags); |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 121 | } |
Erik Gilling | 8edb4ad | 2013-02-28 16:43:06 -0800 | [diff] [blame] | 122 | EXPORT_SYMBOL(sync_timeline_signal); |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 123 | |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 124 | struct sync_pt *sync_pt_create(struct sync_timeline *obj, int size) |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 125 | { |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 126 | unsigned long flags; |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 127 | struct sync_pt *pt; |
| 128 | |
| 129 | if (size < sizeof(struct sync_pt)) |
| 130 | return NULL; |
| 131 | |
| 132 | pt = kzalloc(size, GFP_KERNEL); |
| 133 | if (pt == NULL) |
| 134 | return NULL; |
| 135 | |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 136 | spin_lock_irqsave(&obj->child_list_lock, flags); |
| 137 | sync_timeline_get(obj); |
| 138 | fence_init(&pt->base, &android_fence_ops, &obj->child_list_lock, |
| 139 | obj->context, ++obj->value); |
| 140 | list_add_tail(&pt->child_list, &obj->child_list_head); |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 141 | INIT_LIST_HEAD(&pt->active_list); |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 142 | spin_unlock_irqrestore(&obj->child_list_lock, flags); |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 143 | return pt; |
| 144 | } |
Erik Gilling | 8edb4ad | 2013-02-28 16:43:06 -0800 | [diff] [blame] | 145 | EXPORT_SYMBOL(sync_pt_create); |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 146 | |
| 147 | void sync_pt_free(struct sync_pt *pt) |
| 148 | { |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 149 | fence_put(&pt->base); |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 150 | } |
Erik Gilling | 8edb4ad | 2013-02-28 16:43:06 -0800 | [diff] [blame] | 151 | EXPORT_SYMBOL(sync_pt_free); |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 152 | |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 153 | static struct sync_fence *sync_fence_alloc(int size, const char *name) |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 154 | { |
| 155 | struct sync_fence *fence; |
| 156 | |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 157 | fence = kzalloc(size, GFP_KERNEL); |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 158 | if (fence == NULL) |
| 159 | return NULL; |
| 160 | |
| 161 | fence->file = anon_inode_getfile("sync_fence", &sync_fence_fops, |
| 162 | fence, 0); |
Wei Yongjun | 5969136 | 2013-03-11 21:45:34 +0800 | [diff] [blame] | 163 | if (IS_ERR(fence->file)) |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 164 | goto err; |
| 165 | |
Erik Gilling | 0154417 | 2013-02-28 16:43:10 -0800 | [diff] [blame] | 166 | kref_init(&fence->kref); |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 167 | strlcpy(fence->name, name, sizeof(fence->name)); |
| 168 | |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 169 | init_waitqueue_head(&fence->wq); |
Erik Gilling | af7582f | 2013-02-28 16:43:00 -0800 | [diff] [blame] | 170 | |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 171 | return fence; |
| 172 | |
| 173 | err: |
| 174 | kfree(fence); |
| 175 | return NULL; |
| 176 | } |
| 177 | |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 178 | static void fence_check_cb_func(struct fence *f, struct fence_cb *cb) |
| 179 | { |
| 180 | struct sync_fence_cb *check; |
| 181 | struct sync_fence *fence; |
| 182 | |
| 183 | check = container_of(cb, struct sync_fence_cb, cb); |
| 184 | fence = check->fence; |
| 185 | |
| 186 | if (atomic_dec_and_test(&fence->status)) |
| 187 | wake_up_all(&fence->wq); |
| 188 | } |
| 189 | |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 190 | /* TODO: implement a create which takes more that one sync_pt */ |
| 191 | struct sync_fence *sync_fence_create(const char *name, struct sync_pt *pt) |
| 192 | { |
| 193 | struct sync_fence *fence; |
| 194 | |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 195 | fence = sync_fence_alloc(offsetof(struct sync_fence, cbs[1]), name); |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 196 | if (fence == NULL) |
| 197 | return NULL; |
| 198 | |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 199 | fence->num_fences = 1; |
| 200 | atomic_set(&fence->status, 1); |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 201 | |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 202 | fence->cbs[0].sync_pt = &pt->base; |
| 203 | fence->cbs[0].fence = fence; |
| 204 | if (fence_add_callback(&pt->base, &fence->cbs[0].cb, |
| 205 | fence_check_cb_func)) |
| 206 | atomic_dec(&fence->status); |
| 207 | |
| 208 | sync_fence_debug_add(fence); |
Erik Gilling | eeb2f57 | 2013-02-28 16:43:19 -0800 | [diff] [blame] | 209 | |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 210 | return fence; |
| 211 | } |
Erik Gilling | 8edb4ad | 2013-02-28 16:43:06 -0800 | [diff] [blame] | 212 | EXPORT_SYMBOL(sync_fence_create); |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 213 | |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 214 | struct sync_fence *sync_fence_fdget(int fd) |
| 215 | { |
| 216 | struct file *file = fget(fd); |
| 217 | |
| 218 | if (file == NULL) |
| 219 | return NULL; |
| 220 | |
| 221 | if (file->f_op != &sync_fence_fops) |
| 222 | goto err; |
| 223 | |
| 224 | return file->private_data; |
| 225 | |
| 226 | err: |
| 227 | fput(file); |
| 228 | return NULL; |
| 229 | } |
Erik Gilling | 8edb4ad | 2013-02-28 16:43:06 -0800 | [diff] [blame] | 230 | EXPORT_SYMBOL(sync_fence_fdget); |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 231 | |
| 232 | void sync_fence_put(struct sync_fence *fence) |
| 233 | { |
| 234 | fput(fence->file); |
| 235 | } |
Erik Gilling | 8edb4ad | 2013-02-28 16:43:06 -0800 | [diff] [blame] | 236 | EXPORT_SYMBOL(sync_fence_put); |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 237 | |
| 238 | void sync_fence_install(struct sync_fence *fence, int fd) |
| 239 | { |
| 240 | fd_install(fd, fence->file); |
| 241 | } |
Erik Gilling | 8edb4ad | 2013-02-28 16:43:06 -0800 | [diff] [blame] | 242 | EXPORT_SYMBOL(sync_fence_install); |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 243 | |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 244 | static void sync_fence_add_pt(struct sync_fence *fence, |
| 245 | int *i, struct fence *pt) |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 246 | { |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 247 | fence->cbs[*i].sync_pt = pt; |
| 248 | fence->cbs[*i].fence = fence; |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 249 | |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 250 | if (!fence_add_callback(pt, &fence->cbs[*i].cb, fence_check_cb_func)) { |
| 251 | fence_get(pt); |
| 252 | (*i)++; |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 253 | } |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 254 | } |
| 255 | |
| 256 | struct sync_fence *sync_fence_merge(const char *name, |
| 257 | struct sync_fence *a, struct sync_fence *b) |
| 258 | { |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 259 | int num_fences = a->num_fences + b->num_fences; |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 260 | struct sync_fence *fence; |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 261 | int i, i_a, i_b; |
| 262 | unsigned long size = offsetof(struct sync_fence, cbs[num_fences]); |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 263 | |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 264 | fence = sync_fence_alloc(size, name); |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 265 | if (fence == NULL) |
| 266 | return NULL; |
| 267 | |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 268 | atomic_set(&fence->status, num_fences); |
Ørjan Eide | 713648f | 2013-02-28 16:43:24 -0800 | [diff] [blame] | 269 | |
Erik Gilling | eeb2f57 | 2013-02-28 16:43:19 -0800 | [diff] [blame] | 270 | /* |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 271 | * Assume sync_fence a and b are both ordered and have no |
| 272 | * duplicates with the same context. |
| 273 | * |
| 274 | * If a sync_fence can only be created with sync_fence_merge |
| 275 | * and sync_fence_create, this is a reasonable assumption. |
Erik Gilling | eeb2f57 | 2013-02-28 16:43:19 -0800 | [diff] [blame] | 276 | */ |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 277 | for (i = i_a = i_b = 0; i_a < a->num_fences && i_b < b->num_fences; ) { |
| 278 | struct fence *pt_a = a->cbs[i_a].sync_pt; |
| 279 | struct fence *pt_b = b->cbs[i_b].sync_pt; |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 280 | |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 281 | if (pt_a->context < pt_b->context) { |
| 282 | sync_fence_add_pt(fence, &i, pt_a); |
| 283 | |
| 284 | i_a++; |
| 285 | } else if (pt_a->context > pt_b->context) { |
| 286 | sync_fence_add_pt(fence, &i, pt_b); |
| 287 | |
| 288 | i_b++; |
| 289 | } else { |
| 290 | if (pt_a->seqno - pt_b->seqno <= INT_MAX) |
| 291 | sync_fence_add_pt(fence, &i, pt_a); |
| 292 | else |
| 293 | sync_fence_add_pt(fence, &i, pt_b); |
| 294 | |
| 295 | i_a++; |
| 296 | i_b++; |
| 297 | } |
| 298 | } |
| 299 | |
| 300 | for (; i_a < a->num_fences; i_a++) |
| 301 | sync_fence_add_pt(fence, &i, a->cbs[i_a].sync_pt); |
| 302 | |
| 303 | for (; i_b < b->num_fences; i_b++) |
| 304 | sync_fence_add_pt(fence, &i, b->cbs[i_b].sync_pt); |
| 305 | |
| 306 | if (num_fences > i) |
| 307 | atomic_sub(num_fences - i, &fence->status); |
| 308 | fence->num_fences = i; |
| 309 | |
| 310 | sync_fence_debug_add(fence); |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 311 | return fence; |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 312 | } |
Erik Gilling | 8edb4ad | 2013-02-28 16:43:06 -0800 | [diff] [blame] | 313 | EXPORT_SYMBOL(sync_fence_merge); |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 314 | |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 315 | int sync_fence_wake_up_wq(wait_queue_t *curr, unsigned mode, |
| 316 | int wake_flags, void *key) |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 317 | { |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 318 | struct sync_fence_waiter *wait; |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 319 | |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 320 | wait = container_of(curr, struct sync_fence_waiter, work); |
| 321 | list_del_init(&wait->work.task_list); |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 322 | |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 323 | wait->callback(wait->work.private, wait); |
| 324 | return 1; |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 325 | } |
| 326 | |
| 327 | int sync_fence_wait_async(struct sync_fence *fence, |
Erik Gilling | c0f61a4 | 2013-02-28 16:43:05 -0800 | [diff] [blame] | 328 | struct sync_fence_waiter *waiter) |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 329 | { |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 330 | int err = atomic_read(&fence->status); |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 331 | unsigned long flags; |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 332 | |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 333 | if (err < 0) |
| 334 | return err; |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 335 | |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 336 | if (!err) |
| 337 | return 1; |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 338 | |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 339 | init_waitqueue_func_entry(&waiter->work, sync_fence_wake_up_wq); |
| 340 | waiter->work.private = fence; |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 341 | |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 342 | spin_lock_irqsave(&fence->wq.lock, flags); |
| 343 | err = atomic_read(&fence->status); |
| 344 | if (err > 0) |
| 345 | __add_wait_queue_tail(&fence->wq, &waiter->work); |
| 346 | spin_unlock_irqrestore(&fence->wq.lock, flags); |
| 347 | |
| 348 | if (err < 0) |
| 349 | return err; |
| 350 | |
| 351 | return !err; |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 352 | } |
Erik Gilling | 8edb4ad | 2013-02-28 16:43:06 -0800 | [diff] [blame] | 353 | EXPORT_SYMBOL(sync_fence_wait_async); |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 354 | |
Erik Gilling | c0f61a4 | 2013-02-28 16:43:05 -0800 | [diff] [blame] | 355 | int sync_fence_cancel_async(struct sync_fence *fence, |
| 356 | struct sync_fence_waiter *waiter) |
| 357 | { |
Erik Gilling | c0f61a4 | 2013-02-28 16:43:05 -0800 | [diff] [blame] | 358 | unsigned long flags; |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 359 | int ret = 0; |
Erik Gilling | c0f61a4 | 2013-02-28 16:43:05 -0800 | [diff] [blame] | 360 | |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 361 | spin_lock_irqsave(&fence->wq.lock, flags); |
| 362 | if (!list_empty(&waiter->work.task_list)) |
| 363 | list_del_init(&waiter->work.task_list); |
| 364 | else |
| 365 | ret = -ENOENT; |
| 366 | spin_unlock_irqrestore(&fence->wq.lock, flags); |
Erik Gilling | c0f61a4 | 2013-02-28 16:43:05 -0800 | [diff] [blame] | 367 | return ret; |
| 368 | } |
Erik Gilling | 8edb4ad | 2013-02-28 16:43:06 -0800 | [diff] [blame] | 369 | EXPORT_SYMBOL(sync_fence_cancel_async); |
Erik Gilling | c0f61a4 | 2013-02-28 16:43:05 -0800 | [diff] [blame] | 370 | |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 371 | int sync_fence_wait(struct sync_fence *fence, long timeout) |
| 372 | { |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 373 | long ret; |
| 374 | int i; |
| 375 | |
| 376 | if (timeout < 0) |
| 377 | timeout = MAX_SCHEDULE_TIMEOUT; |
| 378 | else |
| 379 | timeout = msecs_to_jiffies(timeout); |
Erik Gilling | b699a64 | 2013-02-28 16:43:23 -0800 | [diff] [blame] | 380 | |
| 381 | trace_sync_wait(fence, 1); |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 382 | for (i = 0; i < fence->num_fences; ++i) |
| 383 | trace_sync_pt(fence->cbs[i].sync_pt); |
| 384 | ret = wait_event_interruptible_timeout(fence->wq, |
| 385 | atomic_read(&fence->status) <= 0, |
| 386 | timeout); |
Erik Gilling | b699a64 | 2013-02-28 16:43:23 -0800 | [diff] [blame] | 387 | trace_sync_wait(fence, 0); |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 388 | |
Grzegorz Swirski | 220f115 | 2014-09-02 20:24:04 +0100 | [diff] [blame] | 389 | if (ret < 0) { |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 390 | return ret; |
Grzegorz Swirski | 220f115 | 2014-09-02 20:24:04 +0100 | [diff] [blame] | 391 | } else if (ret == 0) { |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 392 | if (timeout) { |
Jamie Gennis | 573632c | 2013-02-28 16:43:26 -0800 | [diff] [blame] | 393 | pr_info("fence timeout on [%p] after %dms\n", fence, |
| 394 | jiffies_to_msecs(timeout)); |
| 395 | sync_dump(); |
| 396 | } |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 397 | return -ETIME; |
Erik Gilling | f56388f | 2013-02-28 16:43:15 -0800 | [diff] [blame] | 398 | } |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 399 | |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 400 | ret = atomic_read(&fence->status); |
| 401 | if (ret) { |
| 402 | pr_info("fence error %ld on [%p]\n", ret, fence); |
| 403 | sync_dump(); |
| 404 | } |
| 405 | return ret; |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 406 | } |
Erik Gilling | 8edb4ad | 2013-02-28 16:43:06 -0800 | [diff] [blame] | 407 | EXPORT_SYMBOL(sync_fence_wait); |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 408 | |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 409 | static const char *android_fence_get_driver_name(struct fence *fence) |
| 410 | { |
| 411 | struct sync_pt *pt = container_of(fence, struct sync_pt, base); |
| 412 | struct sync_timeline *parent = sync_pt_parent(pt); |
| 413 | |
| 414 | return parent->ops->driver_name; |
| 415 | } |
| 416 | |
| 417 | static const char *android_fence_get_timeline_name(struct fence *fence) |
| 418 | { |
| 419 | struct sync_pt *pt = container_of(fence, struct sync_pt, base); |
| 420 | struct sync_timeline *parent = sync_pt_parent(pt); |
| 421 | |
| 422 | return parent->name; |
| 423 | } |
| 424 | |
| 425 | static void android_fence_release(struct fence *fence) |
| 426 | { |
| 427 | struct sync_pt *pt = container_of(fence, struct sync_pt, base); |
| 428 | struct sync_timeline *parent = sync_pt_parent(pt); |
| 429 | unsigned long flags; |
| 430 | |
| 431 | spin_lock_irqsave(fence->lock, flags); |
| 432 | list_del(&pt->child_list); |
| 433 | if (WARN_ON_ONCE(!list_empty(&pt->active_list))) |
| 434 | list_del(&pt->active_list); |
| 435 | spin_unlock_irqrestore(fence->lock, flags); |
| 436 | |
| 437 | if (parent->ops->free_pt) |
| 438 | parent->ops->free_pt(pt); |
| 439 | |
| 440 | sync_timeline_put(parent); |
| 441 | fence_free(&pt->base); |
| 442 | } |
| 443 | |
| 444 | static bool android_fence_signaled(struct fence *fence) |
| 445 | { |
| 446 | struct sync_pt *pt = container_of(fence, struct sync_pt, base); |
| 447 | struct sync_timeline *parent = sync_pt_parent(pt); |
| 448 | int ret; |
| 449 | |
| 450 | ret = parent->ops->has_signaled(pt); |
| 451 | if (ret < 0) |
| 452 | fence->status = ret; |
| 453 | return ret; |
| 454 | } |
| 455 | |
| 456 | static bool android_fence_enable_signaling(struct fence *fence) |
| 457 | { |
| 458 | struct sync_pt *pt = container_of(fence, struct sync_pt, base); |
| 459 | struct sync_timeline *parent = sync_pt_parent(pt); |
| 460 | |
| 461 | if (android_fence_signaled(fence)) |
| 462 | return false; |
| 463 | |
| 464 | list_add_tail(&pt->active_list, &parent->active_list_head); |
| 465 | return true; |
| 466 | } |
| 467 | |
| 468 | static int android_fence_fill_driver_data(struct fence *fence, |
| 469 | void *data, int size) |
| 470 | { |
| 471 | struct sync_pt *pt = container_of(fence, struct sync_pt, base); |
| 472 | struct sync_timeline *parent = sync_pt_parent(pt); |
| 473 | |
| 474 | if (!parent->ops->fill_driver_data) |
| 475 | return 0; |
| 476 | return parent->ops->fill_driver_data(pt, data, size); |
| 477 | } |
| 478 | |
| 479 | static void android_fence_value_str(struct fence *fence, |
| 480 | char *str, int size) |
| 481 | { |
| 482 | struct sync_pt *pt = container_of(fence, struct sync_pt, base); |
| 483 | struct sync_timeline *parent = sync_pt_parent(pt); |
| 484 | |
| 485 | if (!parent->ops->pt_value_str) { |
| 486 | if (size) |
| 487 | *str = 0; |
| 488 | return; |
| 489 | } |
| 490 | parent->ops->pt_value_str(pt, str, size); |
| 491 | } |
| 492 | |
| 493 | static void android_fence_timeline_value_str(struct fence *fence, |
| 494 | char *str, int size) |
| 495 | { |
| 496 | struct sync_pt *pt = container_of(fence, struct sync_pt, base); |
| 497 | struct sync_timeline *parent = sync_pt_parent(pt); |
| 498 | |
| 499 | if (!parent->ops->timeline_value_str) { |
| 500 | if (size) |
| 501 | *str = 0; |
| 502 | return; |
| 503 | } |
| 504 | parent->ops->timeline_value_str(parent, str, size); |
| 505 | } |
| 506 | |
| 507 | static const struct fence_ops android_fence_ops = { |
| 508 | .get_driver_name = android_fence_get_driver_name, |
| 509 | .get_timeline_name = android_fence_get_timeline_name, |
| 510 | .enable_signaling = android_fence_enable_signaling, |
| 511 | .signaled = android_fence_signaled, |
| 512 | .wait = fence_default_wait, |
| 513 | .release = android_fence_release, |
| 514 | .fill_driver_data = android_fence_fill_driver_data, |
| 515 | .fence_value_str = android_fence_value_str, |
| 516 | .timeline_value_str = android_fence_timeline_value_str, |
| 517 | }; |
| 518 | |
Erik Gilling | 0154417 | 2013-02-28 16:43:10 -0800 | [diff] [blame] | 519 | static void sync_fence_free(struct kref *kref) |
| 520 | { |
| 521 | struct sync_fence *fence = container_of(kref, struct sync_fence, kref); |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 522 | int i, status = atomic_read(&fence->status); |
Erik Gilling | 0154417 | 2013-02-28 16:43:10 -0800 | [diff] [blame] | 523 | |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 524 | for (i = 0; i < fence->num_fences; ++i) { |
| 525 | if (status) |
| 526 | fence_remove_callback(fence->cbs[i].sync_pt, |
| 527 | &fence->cbs[i].cb); |
| 528 | fence_put(fence->cbs[i].sync_pt); |
| 529 | } |
Erik Gilling | 0154417 | 2013-02-28 16:43:10 -0800 | [diff] [blame] | 530 | |
| 531 | kfree(fence); |
| 532 | } |
| 533 | |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 534 | static int sync_fence_release(struct inode *inode, struct file *file) |
| 535 | { |
| 536 | struct sync_fence *fence = file->private_data; |
| 537 | |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 538 | sync_fence_debug_remove(fence); |
Erik Gilling | cc3c5cd | 2013-02-28 16:43:08 -0800 | [diff] [blame] | 539 | |
Erik Gilling | 0154417 | 2013-02-28 16:43:10 -0800 | [diff] [blame] | 540 | kref_put(&fence->kref, sync_fence_free); |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 541 | return 0; |
| 542 | } |
| 543 | |
Erik Gilling | 57b505b | 2013-02-28 16:43:04 -0800 | [diff] [blame] | 544 | static unsigned int sync_fence_poll(struct file *file, poll_table *wait) |
| 545 | { |
| 546 | struct sync_fence *fence = file->private_data; |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 547 | int status; |
Erik Gilling | 57b505b | 2013-02-28 16:43:04 -0800 | [diff] [blame] | 548 | |
| 549 | poll_wait(file, &fence->wq, wait); |
| 550 | |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 551 | status = atomic_read(&fence->status); |
Erik Gilling | c679212 | 2013-02-28 16:43:18 -0800 | [diff] [blame] | 552 | |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 553 | if (!status) |
Erik Gilling | 57b505b | 2013-02-28 16:43:04 -0800 | [diff] [blame] | 554 | return POLLIN; |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 555 | else if (status < 0) |
Erik Gilling | 57b505b | 2013-02-28 16:43:04 -0800 | [diff] [blame] | 556 | return POLLERR; |
Lucas Tanure | 6a44b50 | 2014-07-15 00:32:35 -0300 | [diff] [blame] | 557 | return 0; |
Erik Gilling | 57b505b | 2013-02-28 16:43:04 -0800 | [diff] [blame] | 558 | } |
| 559 | |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 560 | static long sync_fence_ioctl_wait(struct sync_fence *fence, unsigned long arg) |
| 561 | { |
| 562 | __s32 value; |
| 563 | |
| 564 | if (copy_from_user(&value, (void __user *)arg, sizeof(value))) |
| 565 | return -EFAULT; |
| 566 | |
| 567 | return sync_fence_wait(fence, value); |
| 568 | } |
| 569 | |
| 570 | static long sync_fence_ioctl_merge(struct sync_fence *fence, unsigned long arg) |
| 571 | { |
Yann Droneaud | 9c6cd3b | 2013-08-15 15:10:54 +0200 | [diff] [blame] | 572 | int fd = get_unused_fd_flags(O_CLOEXEC); |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 573 | int err; |
| 574 | struct sync_fence *fence2, *fence3; |
| 575 | struct sync_merge_data data; |
| 576 | |
Rebecca Schultz Zavin | 92ea915a | 2013-02-28 16:43:12 -0800 | [diff] [blame] | 577 | if (fd < 0) |
| 578 | return fd; |
| 579 | |
| 580 | if (copy_from_user(&data, (void __user *)arg, sizeof(data))) { |
| 581 | err = -EFAULT; |
| 582 | goto err_put_fd; |
| 583 | } |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 584 | |
| 585 | fence2 = sync_fence_fdget(data.fd2); |
| 586 | if (fence2 == NULL) { |
| 587 | err = -ENOENT; |
| 588 | goto err_put_fd; |
| 589 | } |
| 590 | |
| 591 | data.name[sizeof(data.name) - 1] = '\0'; |
| 592 | fence3 = sync_fence_merge(data.name, fence, fence2); |
| 593 | if (fence3 == NULL) { |
| 594 | err = -ENOMEM; |
| 595 | goto err_put_fence2; |
| 596 | } |
| 597 | |
| 598 | data.fence = fd; |
| 599 | if (copy_to_user((void __user *)arg, &data, sizeof(data))) { |
| 600 | err = -EFAULT; |
| 601 | goto err_put_fence3; |
| 602 | } |
| 603 | |
| 604 | sync_fence_install(fence3, fd); |
| 605 | sync_fence_put(fence2); |
| 606 | return 0; |
| 607 | |
| 608 | err_put_fence3: |
| 609 | sync_fence_put(fence3); |
| 610 | |
| 611 | err_put_fence2: |
| 612 | sync_fence_put(fence2); |
| 613 | |
| 614 | err_put_fd: |
| 615 | put_unused_fd(fd); |
| 616 | return err; |
| 617 | } |
| 618 | |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 619 | static int sync_fill_pt_info(struct fence *fence, void *data, int size) |
Erik Gilling | 79ba152 | 2013-02-28 16:43:02 -0800 | [diff] [blame] | 620 | { |
| 621 | struct sync_pt_info *info = data; |
| 622 | int ret; |
| 623 | |
| 624 | if (size < sizeof(struct sync_pt_info)) |
| 625 | return -ENOMEM; |
| 626 | |
| 627 | info->len = sizeof(struct sync_pt_info); |
| 628 | |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 629 | if (fence->ops->fill_driver_data) { |
| 630 | ret = fence->ops->fill_driver_data(fence, info->driver_data, |
| 631 | size - sizeof(*info)); |
Erik Gilling | 79ba152 | 2013-02-28 16:43:02 -0800 | [diff] [blame] | 632 | if (ret < 0) |
| 633 | return ret; |
| 634 | |
| 635 | info->len += ret; |
| 636 | } |
| 637 | |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 638 | strlcpy(info->obj_name, fence->ops->get_timeline_name(fence), |
| 639 | sizeof(info->obj_name)); |
| 640 | strlcpy(info->driver_name, fence->ops->get_driver_name(fence), |
Erik Gilling | 79ba152 | 2013-02-28 16:43:02 -0800 | [diff] [blame] | 641 | sizeof(info->driver_name)); |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 642 | if (fence_is_signaled(fence)) |
| 643 | info->status = fence->status >= 0 ? 1 : fence->status; |
| 644 | else |
| 645 | info->status = 0; |
| 646 | info->timestamp_ns = ktime_to_ns(fence->timestamp); |
Erik Gilling | 79ba152 | 2013-02-28 16:43:02 -0800 | [diff] [blame] | 647 | |
| 648 | return info->len; |
| 649 | } |
| 650 | |
| 651 | static long sync_fence_ioctl_fence_info(struct sync_fence *fence, |
| 652 | unsigned long arg) |
| 653 | { |
| 654 | struct sync_fence_info_data *data; |
Erik Gilling | 79ba152 | 2013-02-28 16:43:02 -0800 | [diff] [blame] | 655 | __u32 size; |
| 656 | __u32 len = 0; |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 657 | int ret, i; |
Erik Gilling | 79ba152 | 2013-02-28 16:43:02 -0800 | [diff] [blame] | 658 | |
| 659 | if (copy_from_user(&size, (void __user *)arg, sizeof(size))) |
| 660 | return -EFAULT; |
| 661 | |
| 662 | if (size < sizeof(struct sync_fence_info_data)) |
| 663 | return -EINVAL; |
| 664 | |
| 665 | if (size > 4096) |
| 666 | size = 4096; |
| 667 | |
| 668 | data = kzalloc(size, GFP_KERNEL); |
| 669 | if (data == NULL) |
| 670 | return -ENOMEM; |
| 671 | |
| 672 | strlcpy(data->name, fence->name, sizeof(data->name)); |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 673 | data->status = atomic_read(&fence->status); |
| 674 | if (data->status >= 0) |
| 675 | data->status = !data->status; |
| 676 | |
Erik Gilling | 79ba152 | 2013-02-28 16:43:02 -0800 | [diff] [blame] | 677 | len = sizeof(struct sync_fence_info_data); |
| 678 | |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 679 | for (i = 0; i < fence->num_fences; ++i) { |
| 680 | struct fence *pt = fence->cbs[i].sync_pt; |
Erik Gilling | 79ba152 | 2013-02-28 16:43:02 -0800 | [diff] [blame] | 681 | |
| 682 | ret = sync_fill_pt_info(pt, (u8 *)data + len, size - len); |
| 683 | |
| 684 | if (ret < 0) |
| 685 | goto out; |
| 686 | |
| 687 | len += ret; |
| 688 | } |
| 689 | |
| 690 | data->len = len; |
| 691 | |
| 692 | if (copy_to_user((void __user *)arg, data, len)) |
| 693 | ret = -EFAULT; |
| 694 | else |
| 695 | ret = 0; |
| 696 | |
| 697 | out: |
| 698 | kfree(data); |
| 699 | |
| 700 | return ret; |
| 701 | } |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 702 | |
| 703 | static long sync_fence_ioctl(struct file *file, unsigned int cmd, |
| 704 | unsigned long arg) |
| 705 | { |
| 706 | struct sync_fence *fence = file->private_data; |
Dipak Zope | 7b1046e | 2014-08-19 04:21:54 -0400 | [diff] [blame] | 707 | |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 708 | switch (cmd) { |
| 709 | case SYNC_IOC_WAIT: |
| 710 | return sync_fence_ioctl_wait(fence, arg); |
| 711 | |
| 712 | case SYNC_IOC_MERGE: |
| 713 | return sync_fence_ioctl_merge(fence, arg); |
Erik Gilling | af7582f | 2013-02-28 16:43:00 -0800 | [diff] [blame] | 714 | |
Erik Gilling | 79ba152 | 2013-02-28 16:43:02 -0800 | [diff] [blame] | 715 | case SYNC_IOC_FENCE_INFO: |
| 716 | return sync_fence_ioctl_fence_info(fence, arg); |
| 717 | |
Erik Gilling | 7ad530b | 2013-02-28 16:42:57 -0800 | [diff] [blame] | 718 | default: |
| 719 | return -ENOTTY; |
| 720 | } |
| 721 | } |
| 722 | |
Maarten Lankhorst | 0f0d840 | 2014-07-01 12:57:31 +0200 | [diff] [blame] | 723 | static const struct file_operations sync_fence_fops = { |
| 724 | .release = sync_fence_release, |
| 725 | .poll = sync_fence_poll, |
| 726 | .unlocked_ioctl = sync_fence_ioctl, |
| 727 | .compat_ioctl = sync_fence_ioctl, |
Erik Gilling | af7582f | 2013-02-28 16:43:00 -0800 | [diff] [blame] | 728 | }; |
| 729 | |