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e9083420 DA |
1 | /* |
2 | * Copyright 2017 Red Hat | |
5e60a10e DA |
3 | * Parts ported from amdgpu (fence wait code). |
4 | * Copyright 2016 Advanced Micro Devices, Inc. | |
e9083420 DA |
5 | * |
6 | * Permission is hereby granted, free of charge, to any person obtaining a | |
7 | * copy of this software and associated documentation files (the "Software"), | |
8 | * to deal in the Software without restriction, including without limitation | |
9 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, | |
10 | * and/or sell copies of the Software, and to permit persons to whom the | |
11 | * Software is furnished to do so, subject to the following conditions: | |
12 | * | |
13 | * The above copyright notice and this permission notice (including the next | |
14 | * paragraph) shall be included in all copies or substantial portions of the | |
15 | * Software. | |
16 | * | |
17 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
18 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
19 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
20 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
21 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING | |
22 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS | |
23 | * IN THE SOFTWARE. | |
24 | * | |
25 | * Authors: | |
26 | * | |
27 | */ | |
28 | ||
29 | /** | |
30 | * DOC: Overview | |
31 | * | |
924fe8df DV |
32 | * DRM synchronisation objects (syncobj, see struct &drm_syncobj) are |
33 | * persistent objects that contain an optional fence. The fence can be updated | |
34 | * with a new fence, or be NULL. | |
e9083420 | 35 | * |
5e60a10e DA |
36 | * syncobj's can be waited upon, where it will wait for the underlying |
37 | * fence. | |
38 | * | |
e9083420 DA |
39 | * syncobj's can be export to fd's and back, these fd's are opaque and |
40 | * have no other use case, except passing the syncobj between processes. | |
41 | * | |
42 | * Their primary use-case is to implement Vulkan fences and semaphores. | |
43 | * | |
44 | * syncobj have a kref reference count, but also have an optional file. | |
45 | * The file is only created once the syncobj is exported. | |
46 | * The file takes a reference on the kref. | |
47 | */ | |
48 | ||
49 | #include <drm/drmP.h> | |
50 | #include <linux/file.h> | |
51 | #include <linux/fs.h> | |
52 | #include <linux/anon_inodes.h> | |
3ee45a3b | 53 | #include <linux/sync_file.h> |
e7aca503 | 54 | #include <linux/sched/signal.h> |
e9083420 DA |
55 | |
56 | #include "drm_internal.h" | |
57 | #include <drm/drm_syncobj.h> | |
58 | ||
59 | /** | |
60 | * drm_syncobj_find - lookup and reference a sync object. | |
61 | * @file_private: drm file private pointer | |
62 | * @handle: sync object handle to lookup. | |
63 | * | |
924fe8df DV |
64 | * Returns a reference to the syncobj pointed to by handle or NULL. The |
65 | * reference must be released by calling drm_syncobj_put(). | |
e9083420 DA |
66 | */ |
67 | struct drm_syncobj *drm_syncobj_find(struct drm_file *file_private, | |
68 | u32 handle) | |
69 | { | |
70 | struct drm_syncobj *syncobj; | |
71 | ||
72 | spin_lock(&file_private->syncobj_table_lock); | |
73 | ||
74 | /* Check if we currently have a reference on the object */ | |
75 | syncobj = idr_find(&file_private->syncobj_idr, handle); | |
76 | if (syncobj) | |
77 | drm_syncobj_get(syncobj); | |
78 | ||
79 | spin_unlock(&file_private->syncobj_table_lock); | |
80 | ||
81 | return syncobj; | |
82 | } | |
83 | EXPORT_SYMBOL(drm_syncobj_find); | |
84 | ||
9c19fb10 JE |
85 | static void drm_syncobj_add_callback_locked(struct drm_syncobj *syncobj, |
86 | struct drm_syncobj_cb *cb, | |
87 | drm_syncobj_func_t func) | |
88 | { | |
89 | cb->func = func; | |
90 | list_add_tail(&cb->node, &syncobj->cb_list); | |
91 | } | |
92 | ||
131280a1 EA |
93 | static int drm_syncobj_fence_get_or_add_callback(struct drm_syncobj *syncobj, |
94 | struct dma_fence **fence, | |
95 | struct drm_syncobj_cb *cb, | |
96 | drm_syncobj_func_t func) | |
e7aca503 | 97 | { |
131280a1 | 98 | int ret; |
337fe9f5 | 99 | |
131280a1 EA |
100 | *fence = drm_syncobj_fence_get(syncobj); |
101 | if (*fence) | |
102 | return 1; | |
43cf1fc0 | 103 | |
131280a1 EA |
104 | spin_lock(&syncobj->lock); |
105 | /* We've already tried once to get a fence and failed. Now that we | |
106 | * have the lock, try one more time just to be sure we don't add a | |
107 | * callback when a fence has already been set. | |
108 | */ | |
109 | if (syncobj->fence) { | |
110 | *fence = dma_fence_get(rcu_dereference_protected(syncobj->fence, | |
111 | lockdep_is_held(&syncobj->lock))); | |
112 | ret = 1; | |
113 | } else { | |
114 | *fence = NULL; | |
43cf1fc0 | 115 | drm_syncobj_add_callback_locked(syncobj, cb, func); |
131280a1 EA |
116 | ret = 0; |
117 | } | |
118 | spin_unlock(&syncobj->lock); | |
9c19fb10 | 119 | |
131280a1 | 120 | return ret; |
48197bc5 CZ |
121 | } |
122 | ||
131280a1 EA |
123 | void drm_syncobj_add_callback(struct drm_syncobj *syncobj, |
124 | struct drm_syncobj_cb *cb, | |
125 | drm_syncobj_func_t func) | |
48197bc5 | 126 | { |
131280a1 EA |
127 | spin_lock(&syncobj->lock); |
128 | drm_syncobj_add_callback_locked(syncobj, cb, func); | |
129 | spin_unlock(&syncobj->lock); | |
48197bc5 CZ |
130 | } |
131 | ||
131280a1 EA |
132 | void drm_syncobj_remove_callback(struct drm_syncobj *syncobj, |
133 | struct drm_syncobj_cb *cb) | |
48197bc5 | 134 | { |
131280a1 EA |
135 | spin_lock(&syncobj->lock); |
136 | list_del_init(&cb->node); | |
137 | spin_unlock(&syncobj->lock); | |
48197bc5 CZ |
138 | } |
139 | ||
e9083420 DA |
140 | /** |
141 | * drm_syncobj_replace_fence - replace fence in a sync object. | |
e9083420 DA |
142 | * @syncobj: Sync object to replace fence in |
143 | * @fence: fence to install in sync file. | |
144 | * | |
0b258ed1 | 145 | * This replaces the fence on a sync object. |
e9083420 | 146 | */ |
00fc2c26 | 147 | void drm_syncobj_replace_fence(struct drm_syncobj *syncobj, |
e9083420 DA |
148 | struct dma_fence *fence) |
149 | { | |
131280a1 EA |
150 | struct dma_fence *old_fence; |
151 | struct drm_syncobj_cb *cur, *tmp; | |
152 | ||
153 | if (fence) | |
154 | dma_fence_get(fence); | |
155 | ||
156 | spin_lock(&syncobj->lock); | |
157 | ||
158 | old_fence = rcu_dereference_protected(syncobj->fence, | |
159 | lockdep_is_held(&syncobj->lock)); | |
160 | rcu_assign_pointer(syncobj->fence, fence); | |
9c19fb10 | 161 | |
131280a1 | 162 | if (fence != old_fence) { |
9c19fb10 JE |
163 | list_for_each_entry_safe(cur, tmp, &syncobj->cb_list, node) { |
164 | list_del_init(&cur->node); | |
165 | cur->func(syncobj, cur); | |
166 | } | |
167 | } | |
131280a1 EA |
168 | |
169 | spin_unlock(&syncobj->lock); | |
170 | ||
171 | dma_fence_put(old_fence); | |
e9083420 DA |
172 | } |
173 | EXPORT_SYMBOL(drm_syncobj_replace_fence); | |
174 | ||
86bbd89d CK |
175 | /** |
176 | * drm_syncobj_assign_null_handle - assign a stub fence to the sync object | |
177 | * @syncobj: sync object to assign the fence on | |
178 | * | |
179 | * Assign a already signaled stub fence to the sync object. | |
180 | */ | |
181 | static void drm_syncobj_assign_null_handle(struct drm_syncobj *syncobj) | |
1fc08218 | 182 | { |
86bbd89d | 183 | struct dma_fence *fence = dma_fence_get_stub(); |
1fc08218 | 184 | |
0b258ed1 | 185 | drm_syncobj_replace_fence(syncobj, fence); |
86bbd89d | 186 | dma_fence_put(fence); |
1fc08218 JE |
187 | } |
188 | ||
924fe8df DV |
189 | /** |
190 | * drm_syncobj_find_fence - lookup and reference the fence in a sync object | |
191 | * @file_private: drm file private pointer | |
192 | * @handle: sync object handle to lookup. | |
0a6730ea | 193 | * @point: timeline point |
871edc96 | 194 | * @flags: DRM_SYNCOBJ_WAIT_FLAGS_WAIT_FOR_SUBMIT or not |
924fe8df DV |
195 | * @fence: out parameter for the fence |
196 | * | |
197 | * This is just a convenience function that combines drm_syncobj_find() and | |
131280a1 | 198 | * drm_syncobj_fence_get(). |
924fe8df DV |
199 | * |
200 | * Returns 0 on success or a negative error value on failure. On success @fence | |
201 | * contains a reference to the fence, which must be released by calling | |
202 | * dma_fence_put(). | |
203 | */ | |
afaf5923 | 204 | int drm_syncobj_find_fence(struct drm_file *file_private, |
649fdce2 | 205 | u32 handle, u64 point, u64 flags, |
afaf5923 | 206 | struct dma_fence **fence) |
e9083420 DA |
207 | { |
208 | struct drm_syncobj *syncobj = drm_syncobj_find(file_private, handle); | |
131280a1 | 209 | int ret = 0; |
e9083420 | 210 | |
131280a1 EA |
211 | if (!syncobj) |
212 | return -ENOENT; | |
213 | ||
214 | *fence = drm_syncobj_fence_get(syncobj); | |
215 | if (!*fence) { | |
216 | ret = -EINVAL; | |
217 | } | |
218 | drm_syncobj_put(syncobj); | |
e9083420 DA |
219 | return ret; |
220 | } | |
afaf5923 | 221 | EXPORT_SYMBOL(drm_syncobj_find_fence); |
e9083420 DA |
222 | |
223 | /** | |
224 | * drm_syncobj_free - free a sync object. | |
225 | * @kref: kref to free. | |
226 | * | |
227 | * Only to be called from kref_put in drm_syncobj_put. | |
228 | */ | |
229 | void drm_syncobj_free(struct kref *kref) | |
230 | { | |
231 | struct drm_syncobj *syncobj = container_of(kref, | |
232 | struct drm_syncobj, | |
233 | refcount); | |
0b258ed1 | 234 | drm_syncobj_replace_fence(syncobj, NULL); |
e9083420 DA |
235 | kfree(syncobj); |
236 | } | |
237 | EXPORT_SYMBOL(drm_syncobj_free); | |
238 | ||
1321fd2c MO |
239 | /** |
240 | * drm_syncobj_create - create a new syncobj | |
241 | * @out_syncobj: returned syncobj | |
242 | * @flags: DRM_SYNCOBJ_* flags | |
243 | * @fence: if non-NULL, the syncobj will represent this fence | |
924fe8df DV |
244 | * |
245 | * This is the first function to create a sync object. After creating, drivers | |
246 | * probably want to make it available to userspace, either through | |
247 | * drm_syncobj_get_handle() or drm_syncobj_get_fd(). | |
248 | * | |
249 | * Returns 0 on success or a negative error value on failure. | |
1321fd2c MO |
250 | */ |
251 | int drm_syncobj_create(struct drm_syncobj **out_syncobj, uint32_t flags, | |
252 | struct dma_fence *fence) | |
e9083420 | 253 | { |
e9083420 DA |
254 | struct drm_syncobj *syncobj; |
255 | ||
256 | syncobj = kzalloc(sizeof(struct drm_syncobj), GFP_KERNEL); | |
257 | if (!syncobj) | |
258 | return -ENOMEM; | |
259 | ||
260 | kref_init(&syncobj->refcount); | |
9c19fb10 | 261 | INIT_LIST_HEAD(&syncobj->cb_list); |
131280a1 | 262 | spin_lock_init(&syncobj->lock); |
e9083420 | 263 | |
86bbd89d CK |
264 | if (flags & DRM_SYNCOBJ_CREATE_SIGNALED) |
265 | drm_syncobj_assign_null_handle(syncobj); | |
1fc08218 | 266 | |
1321fd2c | 267 | if (fence) |
0b258ed1 | 268 | drm_syncobj_replace_fence(syncobj, fence); |
1321fd2c MO |
269 | |
270 | *out_syncobj = syncobj; | |
271 | return 0; | |
272 | } | |
273 | EXPORT_SYMBOL(drm_syncobj_create); | |
274 | ||
275 | /** | |
276 | * drm_syncobj_get_handle - get a handle from a syncobj | |
924fe8df DV |
277 | * @file_private: drm file private pointer |
278 | * @syncobj: Sync object to export | |
279 | * @handle: out parameter with the new handle | |
280 | * | |
281 | * Exports a sync object created with drm_syncobj_create() as a handle on | |
282 | * @file_private to userspace. | |
283 | * | |
284 | * Returns 0 on success or a negative error value on failure. | |
1321fd2c MO |
285 | */ |
286 | int drm_syncobj_get_handle(struct drm_file *file_private, | |
287 | struct drm_syncobj *syncobj, u32 *handle) | |
288 | { | |
289 | int ret; | |
290 | ||
291 | /* take a reference to put in the idr */ | |
292 | drm_syncobj_get(syncobj); | |
293 | ||
e9083420 DA |
294 | idr_preload(GFP_KERNEL); |
295 | spin_lock(&file_private->syncobj_table_lock); | |
296 | ret = idr_alloc(&file_private->syncobj_idr, syncobj, 1, 0, GFP_NOWAIT); | |
297 | spin_unlock(&file_private->syncobj_table_lock); | |
298 | ||
299 | idr_preload_end(); | |
300 | ||
301 | if (ret < 0) { | |
302 | drm_syncobj_put(syncobj); | |
303 | return ret; | |
304 | } | |
305 | ||
306 | *handle = ret; | |
307 | return 0; | |
308 | } | |
1321fd2c MO |
309 | EXPORT_SYMBOL(drm_syncobj_get_handle); |
310 | ||
311 | static int drm_syncobj_create_as_handle(struct drm_file *file_private, | |
312 | u32 *handle, uint32_t flags) | |
313 | { | |
314 | int ret; | |
315 | struct drm_syncobj *syncobj; | |
316 | ||
317 | ret = drm_syncobj_create(&syncobj, flags, NULL); | |
318 | if (ret) | |
319 | return ret; | |
320 | ||
321 | ret = drm_syncobj_get_handle(file_private, syncobj, handle); | |
322 | drm_syncobj_put(syncobj); | |
323 | return ret; | |
324 | } | |
e9083420 DA |
325 | |
326 | static int drm_syncobj_destroy(struct drm_file *file_private, | |
327 | u32 handle) | |
328 | { | |
329 | struct drm_syncobj *syncobj; | |
330 | ||
331 | spin_lock(&file_private->syncobj_table_lock); | |
332 | syncobj = idr_remove(&file_private->syncobj_idr, handle); | |
333 | spin_unlock(&file_private->syncobj_table_lock); | |
334 | ||
335 | if (!syncobj) | |
336 | return -EINVAL; | |
337 | ||
338 | drm_syncobj_put(syncobj); | |
339 | return 0; | |
340 | } | |
341 | ||
342 | static int drm_syncobj_file_release(struct inode *inode, struct file *file) | |
343 | { | |
344 | struct drm_syncobj *syncobj = file->private_data; | |
345 | ||
346 | drm_syncobj_put(syncobj); | |
347 | return 0; | |
348 | } | |
349 | ||
350 | static const struct file_operations drm_syncobj_file_fops = { | |
351 | .release = drm_syncobj_file_release, | |
352 | }; | |
353 | ||
924fe8df DV |
354 | /** |
355 | * drm_syncobj_get_fd - get a file descriptor from a syncobj | |
356 | * @syncobj: Sync object to export | |
357 | * @p_fd: out parameter with the new file descriptor | |
358 | * | |
359 | * Exports a sync object created with drm_syncobj_create() as a file descriptor. | |
360 | * | |
361 | * Returns 0 on success or a negative error value on failure. | |
362 | */ | |
684fd0af | 363 | int drm_syncobj_get_fd(struct drm_syncobj *syncobj, int *p_fd) |
e9083420 | 364 | { |
e7cdf5c8 | 365 | struct file *file; |
e9083420 DA |
366 | int fd; |
367 | ||
e9083420 | 368 | fd = get_unused_fd_flags(O_CLOEXEC); |
684fd0af | 369 | if (fd < 0) |
e9083420 | 370 | return fd; |
e9083420 | 371 | |
e7cdf5c8 CW |
372 | file = anon_inode_getfile("syncobj_file", |
373 | &drm_syncobj_file_fops, | |
374 | syncobj, 0); | |
375 | if (IS_ERR(file)) { | |
376 | put_unused_fd(fd); | |
377 | return PTR_ERR(file); | |
e9083420 | 378 | } |
e7cdf5c8 CW |
379 | |
380 | drm_syncobj_get(syncobj); | |
381 | fd_install(fd, file); | |
382 | ||
e9083420 DA |
383 | *p_fd = fd; |
384 | return 0; | |
684fd0af MO |
385 | } |
386 | EXPORT_SYMBOL(drm_syncobj_get_fd); | |
387 | ||
388 | static int drm_syncobj_handle_to_fd(struct drm_file *file_private, | |
389 | u32 handle, int *p_fd) | |
390 | { | |
391 | struct drm_syncobj *syncobj = drm_syncobj_find(file_private, handle); | |
392 | int ret; | |
393 | ||
394 | if (!syncobj) | |
395 | return -EINVAL; | |
396 | ||
397 | ret = drm_syncobj_get_fd(syncobj, p_fd); | |
e9083420 DA |
398 | drm_syncobj_put(syncobj); |
399 | return ret; | |
400 | } | |
401 | ||
e9083420 DA |
402 | static int drm_syncobj_fd_to_handle(struct drm_file *file_private, |
403 | int fd, u32 *handle) | |
404 | { | |
e7cdf5c8 CW |
405 | struct drm_syncobj *syncobj; |
406 | struct file *file; | |
e9083420 DA |
407 | int ret; |
408 | ||
e7cdf5c8 CW |
409 | file = fget(fd); |
410 | if (!file) | |
e9083420 DA |
411 | return -EINVAL; |
412 | ||
e7cdf5c8 CW |
413 | if (file->f_op != &drm_syncobj_file_fops) { |
414 | fput(file); | |
415 | return -EINVAL; | |
416 | } | |
417 | ||
e9083420 | 418 | /* take a reference to put in the idr */ |
e7cdf5c8 | 419 | syncobj = file->private_data; |
e9083420 DA |
420 | drm_syncobj_get(syncobj); |
421 | ||
422 | idr_preload(GFP_KERNEL); | |
423 | spin_lock(&file_private->syncobj_table_lock); | |
424 | ret = idr_alloc(&file_private->syncobj_idr, syncobj, 1, 0, GFP_NOWAIT); | |
425 | spin_unlock(&file_private->syncobj_table_lock); | |
426 | idr_preload_end(); | |
427 | ||
e7cdf5c8 CW |
428 | if (ret > 0) { |
429 | *handle = ret; | |
430 | ret = 0; | |
431 | } else | |
432 | drm_syncobj_put(syncobj); | |
433 | ||
434 | fput(file); | |
435 | return ret; | |
e9083420 DA |
436 | } |
437 | ||
a32c94af VS |
438 | static int drm_syncobj_import_sync_file_fence(struct drm_file *file_private, |
439 | int fd, int handle) | |
3ee45a3b DA |
440 | { |
441 | struct dma_fence *fence = sync_file_get_fence(fd); | |
442 | struct drm_syncobj *syncobj; | |
443 | ||
444 | if (!fence) | |
445 | return -EINVAL; | |
446 | ||
447 | syncobj = drm_syncobj_find(file_private, handle); | |
448 | if (!syncobj) { | |
449 | dma_fence_put(fence); | |
450 | return -ENOENT; | |
451 | } | |
452 | ||
0b258ed1 | 453 | drm_syncobj_replace_fence(syncobj, fence); |
3ee45a3b DA |
454 | dma_fence_put(fence); |
455 | drm_syncobj_put(syncobj); | |
456 | return 0; | |
457 | } | |
458 | ||
a32c94af VS |
459 | static int drm_syncobj_export_sync_file(struct drm_file *file_private, |
460 | int handle, int *p_fd) | |
3ee45a3b DA |
461 | { |
462 | int ret; | |
463 | struct dma_fence *fence; | |
464 | struct sync_file *sync_file; | |
465 | int fd = get_unused_fd_flags(O_CLOEXEC); | |
466 | ||
467 | if (fd < 0) | |
468 | return fd; | |
469 | ||
649fdce2 | 470 | ret = drm_syncobj_find_fence(file_private, handle, 0, 0, &fence); |
3ee45a3b DA |
471 | if (ret) |
472 | goto err_put_fd; | |
473 | ||
474 | sync_file = sync_file_create(fence); | |
475 | ||
476 | dma_fence_put(fence); | |
477 | ||
478 | if (!sync_file) { | |
479 | ret = -EINVAL; | |
480 | goto err_put_fd; | |
481 | } | |
482 | ||
483 | fd_install(fd, sync_file->file); | |
484 | ||
485 | *p_fd = fd; | |
486 | return 0; | |
487 | err_put_fd: | |
488 | put_unused_fd(fd); | |
489 | return ret; | |
490 | } | |
e9083420 DA |
491 | /** |
492 | * drm_syncobj_open - initalizes syncobj file-private structures at devnode open time | |
e9083420 DA |
493 | * @file_private: drm file-private structure to set up |
494 | * | |
495 | * Called at device open time, sets up the structure for handling refcounting | |
496 | * of sync objects. | |
497 | */ | |
498 | void | |
499 | drm_syncobj_open(struct drm_file *file_private) | |
500 | { | |
e86584c5 | 501 | idr_init_base(&file_private->syncobj_idr, 1); |
e9083420 DA |
502 | spin_lock_init(&file_private->syncobj_table_lock); |
503 | } | |
504 | ||
505 | static int | |
506 | drm_syncobj_release_handle(int id, void *ptr, void *data) | |
507 | { | |
508 | struct drm_syncobj *syncobj = ptr; | |
509 | ||
510 | drm_syncobj_put(syncobj); | |
511 | return 0; | |
512 | } | |
513 | ||
514 | /** | |
515 | * drm_syncobj_release - release file-private sync object resources | |
e9083420 DA |
516 | * @file_private: drm file-private structure to clean up |
517 | * | |
518 | * Called at close time when the filp is going away. | |
519 | * | |
520 | * Releases any remaining references on objects by this filp. | |
521 | */ | |
522 | void | |
523 | drm_syncobj_release(struct drm_file *file_private) | |
524 | { | |
525 | idr_for_each(&file_private->syncobj_idr, | |
526 | &drm_syncobj_release_handle, file_private); | |
527 | idr_destroy(&file_private->syncobj_idr); | |
528 | } | |
529 | ||
530 | int | |
531 | drm_syncobj_create_ioctl(struct drm_device *dev, void *data, | |
532 | struct drm_file *file_private) | |
533 | { | |
534 | struct drm_syncobj_create *args = data; | |
535 | ||
536 | if (!drm_core_check_feature(dev, DRIVER_SYNCOBJ)) | |
69fdf420 | 537 | return -EOPNOTSUPP; |
e9083420 DA |
538 | |
539 | /* no valid flags yet */ | |
131280a1 | 540 | if (args->flags & ~DRM_SYNCOBJ_CREATE_SIGNALED) |
e9083420 DA |
541 | return -EINVAL; |
542 | ||
1321fd2c MO |
543 | return drm_syncobj_create_as_handle(file_private, |
544 | &args->handle, args->flags); | |
e9083420 DA |
545 | } |
546 | ||
547 | int | |
548 | drm_syncobj_destroy_ioctl(struct drm_device *dev, void *data, | |
549 | struct drm_file *file_private) | |
550 | { | |
551 | struct drm_syncobj_destroy *args = data; | |
552 | ||
553 | if (!drm_core_check_feature(dev, DRIVER_SYNCOBJ)) | |
69fdf420 | 554 | return -EOPNOTSUPP; |
e9083420 DA |
555 | |
556 | /* make sure padding is empty */ | |
557 | if (args->pad) | |
558 | return -EINVAL; | |
559 | return drm_syncobj_destroy(file_private, args->handle); | |
560 | } | |
561 | ||
562 | int | |
563 | drm_syncobj_handle_to_fd_ioctl(struct drm_device *dev, void *data, | |
564 | struct drm_file *file_private) | |
565 | { | |
566 | struct drm_syncobj_handle *args = data; | |
567 | ||
568 | if (!drm_core_check_feature(dev, DRIVER_SYNCOBJ)) | |
69fdf420 | 569 | return -EOPNOTSUPP; |
e9083420 | 570 | |
3ee45a3b | 571 | if (args->pad) |
e9083420 DA |
572 | return -EINVAL; |
573 | ||
3ee45a3b DA |
574 | if (args->flags != 0 && |
575 | args->flags != DRM_SYNCOBJ_HANDLE_TO_FD_FLAGS_EXPORT_SYNC_FILE) | |
576 | return -EINVAL; | |
577 | ||
578 | if (args->flags & DRM_SYNCOBJ_HANDLE_TO_FD_FLAGS_EXPORT_SYNC_FILE) | |
579 | return drm_syncobj_export_sync_file(file_private, args->handle, | |
580 | &args->fd); | |
581 | ||
e9083420 DA |
582 | return drm_syncobj_handle_to_fd(file_private, args->handle, |
583 | &args->fd); | |
584 | } | |
585 | ||
586 | int | |
587 | drm_syncobj_fd_to_handle_ioctl(struct drm_device *dev, void *data, | |
588 | struct drm_file *file_private) | |
589 | { | |
590 | struct drm_syncobj_handle *args = data; | |
591 | ||
592 | if (!drm_core_check_feature(dev, DRIVER_SYNCOBJ)) | |
69fdf420 | 593 | return -EOPNOTSUPP; |
e9083420 | 594 | |
3ee45a3b DA |
595 | if (args->pad) |
596 | return -EINVAL; | |
597 | ||
598 | if (args->flags != 0 && | |
599 | args->flags != DRM_SYNCOBJ_FD_TO_HANDLE_FLAGS_IMPORT_SYNC_FILE) | |
e9083420 DA |
600 | return -EINVAL; |
601 | ||
3ee45a3b DA |
602 | if (args->flags & DRM_SYNCOBJ_FD_TO_HANDLE_FLAGS_IMPORT_SYNC_FILE) |
603 | return drm_syncobj_import_sync_file_fence(file_private, | |
604 | args->fd, | |
605 | args->handle); | |
606 | ||
e9083420 DA |
607 | return drm_syncobj_fd_to_handle(file_private, args->fd, |
608 | &args->handle); | |
609 | } | |
5e60a10e | 610 | |
e7aca503 JE |
611 | struct syncobj_wait_entry { |
612 | struct task_struct *task; | |
613 | struct dma_fence *fence; | |
614 | struct dma_fence_cb fence_cb; | |
615 | struct drm_syncobj_cb syncobj_cb; | |
616 | }; | |
617 | ||
618 | static void syncobj_wait_fence_func(struct dma_fence *fence, | |
619 | struct dma_fence_cb *cb) | |
620 | { | |
621 | struct syncobj_wait_entry *wait = | |
622 | container_of(cb, struct syncobj_wait_entry, fence_cb); | |
623 | ||
624 | wake_up_process(wait->task); | |
625 | } | |
626 | ||
627 | static void syncobj_wait_syncobj_func(struct drm_syncobj *syncobj, | |
628 | struct drm_syncobj_cb *cb) | |
629 | { | |
630 | struct syncobj_wait_entry *wait = | |
631 | container_of(cb, struct syncobj_wait_entry, syncobj_cb); | |
632 | ||
131280a1 EA |
633 | /* This happens inside the syncobj lock */ |
634 | wait->fence = dma_fence_get(rcu_dereference_protected(syncobj->fence, | |
635 | lockdep_is_held(&syncobj->lock))); | |
e7aca503 JE |
636 | wake_up_process(wait->task); |
637 | } | |
638 | ||
639 | static signed long drm_syncobj_array_wait_timeout(struct drm_syncobj **syncobjs, | |
640 | uint32_t count, | |
641 | uint32_t flags, | |
642 | signed long timeout, | |
643 | uint32_t *idx) | |
644 | { | |
645 | struct syncobj_wait_entry *entries; | |
646 | struct dma_fence *fence; | |
e7aca503 JE |
647 | uint32_t signaled_count, i; |
648 | ||
649 | entries = kcalloc(count, sizeof(*entries), GFP_KERNEL); | |
650 | if (!entries) | |
651 | return -ENOMEM; | |
652 | ||
653 | /* Walk the list of sync objects and initialize entries. We do | |
654 | * this up-front so that we can properly return -EINVAL if there is | |
655 | * a syncobj with a missing fence and then never have the chance of | |
656 | * returning -EINVAL again. | |
657 | */ | |
658 | signaled_count = 0; | |
659 | for (i = 0; i < count; ++i) { | |
660 | entries[i].task = current; | |
131280a1 | 661 | entries[i].fence = drm_syncobj_fence_get(syncobjs[i]); |
e7aca503 JE |
662 | if (!entries[i].fence) { |
663 | if (flags & DRM_SYNCOBJ_WAIT_FLAGS_WAIT_FOR_SUBMIT) { | |
664 | continue; | |
665 | } else { | |
12fec62a | 666 | timeout = -EINVAL; |
e7aca503 JE |
667 | goto cleanup_entries; |
668 | } | |
669 | } | |
670 | ||
671 | if (dma_fence_is_signaled(entries[i].fence)) { | |
672 | if (signaled_count == 0 && idx) | |
673 | *idx = i; | |
674 | signaled_count++; | |
675 | } | |
676 | } | |
677 | ||
e7aca503 JE |
678 | if (signaled_count == count || |
679 | (signaled_count > 0 && | |
680 | !(flags & DRM_SYNCOBJ_WAIT_FLAGS_WAIT_ALL))) | |
681 | goto cleanup_entries; | |
682 | ||
683 | /* There's a very annoying laxness in the dma_fence API here, in | |
684 | * that backends are not required to automatically report when a | |
685 | * fence is signaled prior to fence->ops->enable_signaling() being | |
686 | * called. So here if we fail to match signaled_count, we need to | |
687 | * fallthough and try a 0 timeout wait! | |
688 | */ | |
689 | ||
690 | if (flags & DRM_SYNCOBJ_WAIT_FLAGS_WAIT_FOR_SUBMIT) { | |
691 | for (i = 0; i < count; ++i) { | |
692 | drm_syncobj_fence_get_or_add_callback(syncobjs[i], | |
693 | &entries[i].fence, | |
694 | &entries[i].syncobj_cb, | |
695 | syncobj_wait_syncobj_func); | |
696 | } | |
697 | } | |
698 | ||
699 | do { | |
700 | set_current_state(TASK_INTERRUPTIBLE); | |
701 | ||
702 | signaled_count = 0; | |
703 | for (i = 0; i < count; ++i) { | |
704 | fence = entries[i].fence; | |
705 | if (!fence) | |
706 | continue; | |
707 | ||
708 | if (dma_fence_is_signaled(fence) || | |
709 | (!entries[i].fence_cb.func && | |
710 | dma_fence_add_callback(fence, | |
711 | &entries[i].fence_cb, | |
712 | syncobj_wait_fence_func))) { | |
713 | /* The fence has been signaled */ | |
714 | if (flags & DRM_SYNCOBJ_WAIT_FLAGS_WAIT_ALL) { | |
715 | signaled_count++; | |
716 | } else { | |
717 | if (idx) | |
718 | *idx = i; | |
719 | goto done_waiting; | |
720 | } | |
721 | } | |
722 | } | |
723 | ||
724 | if (signaled_count == count) | |
725 | goto done_waiting; | |
726 | ||
727 | if (timeout == 0) { | |
12fec62a | 728 | timeout = -ETIME; |
e7aca503 JE |
729 | goto done_waiting; |
730 | } | |
731 | ||
12fec62a CW |
732 | if (signal_pending(current)) { |
733 | timeout = -ERESTARTSYS; | |
734 | goto done_waiting; | |
735 | } | |
e7aca503 | 736 | |
12fec62a CW |
737 | timeout = schedule_timeout(timeout); |
738 | } while (1); | |
e7aca503 JE |
739 | |
740 | done_waiting: | |
741 | __set_current_state(TASK_RUNNING); | |
742 | ||
743 | cleanup_entries: | |
744 | for (i = 0; i < count; ++i) { | |
745 | if (entries[i].syncobj_cb.func) | |
746 | drm_syncobj_remove_callback(syncobjs[i], | |
747 | &entries[i].syncobj_cb); | |
748 | if (entries[i].fence_cb.func) | |
749 | dma_fence_remove_callback(entries[i].fence, | |
750 | &entries[i].fence_cb); | |
751 | dma_fence_put(entries[i].fence); | |
752 | } | |
753 | kfree(entries); | |
754 | ||
12fec62a | 755 | return timeout; |
e7aca503 JE |
756 | } |
757 | ||
5e60a10e DA |
758 | /** |
759 | * drm_timeout_abs_to_jiffies - calculate jiffies timeout from absolute value | |
760 | * | |
761 | * @timeout_nsec: timeout nsec component in ns, 0 for poll | |
762 | * | |
763 | * Calculate the timeout in jiffies from an absolute time in sec/nsec. | |
764 | */ | |
765 | static signed long drm_timeout_abs_to_jiffies(int64_t timeout_nsec) | |
766 | { | |
767 | ktime_t abs_timeout, now; | |
768 | u64 timeout_ns, timeout_jiffies64; | |
769 | ||
770 | /* make 0 timeout means poll - absolute 0 doesn't seem valid */ | |
771 | if (timeout_nsec == 0) | |
772 | return 0; | |
773 | ||
774 | abs_timeout = ns_to_ktime(timeout_nsec); | |
775 | now = ktime_get(); | |
776 | ||
777 | if (!ktime_after(abs_timeout, now)) | |
778 | return 0; | |
779 | ||
780 | timeout_ns = ktime_to_ns(ktime_sub(abs_timeout, now)); | |
781 | ||
782 | timeout_jiffies64 = nsecs_to_jiffies64(timeout_ns); | |
783 | /* clamp timeout to avoid infinite timeout */ | |
784 | if (timeout_jiffies64 >= MAX_SCHEDULE_TIMEOUT - 1) | |
785 | return MAX_SCHEDULE_TIMEOUT - 1; | |
786 | ||
787 | return timeout_jiffies64 + 1; | |
788 | } | |
789 | ||
e7aca503 JE |
790 | static int drm_syncobj_array_wait(struct drm_device *dev, |
791 | struct drm_file *file_private, | |
792 | struct drm_syncobj_wait *wait, | |
793 | struct drm_syncobj **syncobjs) | |
5e60a10e DA |
794 | { |
795 | signed long timeout = drm_timeout_abs_to_jiffies(wait->timeout_nsec); | |
5e60a10e DA |
796 | uint32_t first = ~0; |
797 | ||
12fec62a CW |
798 | timeout = drm_syncobj_array_wait_timeout(syncobjs, |
799 | wait->count_handles, | |
800 | wait->flags, | |
801 | timeout, &first); | |
802 | if (timeout < 0) | |
803 | return timeout; | |
5e60a10e DA |
804 | |
805 | wait->first_signaled = first; | |
5e60a10e DA |
806 | return 0; |
807 | } | |
808 | ||
3e6fb72d | 809 | static int drm_syncobj_array_find(struct drm_file *file_private, |
9e554462 VS |
810 | void __user *user_handles, |
811 | uint32_t count_handles, | |
3e6fb72d | 812 | struct drm_syncobj ***syncobjs_out) |
5e60a10e | 813 | { |
3e6fb72d | 814 | uint32_t i, *handles; |
e7aca503 | 815 | struct drm_syncobj **syncobjs; |
3e6fb72d | 816 | int ret; |
5e60a10e | 817 | |
3e6fb72d | 818 | handles = kmalloc_array(count_handles, sizeof(*handles), GFP_KERNEL); |
5e60a10e DA |
819 | if (handles == NULL) |
820 | return -ENOMEM; | |
821 | ||
3e6fb72d JE |
822 | if (copy_from_user(handles, user_handles, |
823 | sizeof(uint32_t) * count_handles)) { | |
5e60a10e DA |
824 | ret = -EFAULT; |
825 | goto err_free_handles; | |
826 | } | |
827 | ||
3e6fb72d JE |
828 | syncobjs = kmalloc_array(count_handles, sizeof(*syncobjs), GFP_KERNEL); |
829 | if (syncobjs == NULL) { | |
5e60a10e DA |
830 | ret = -ENOMEM; |
831 | goto err_free_handles; | |
832 | } | |
833 | ||
3e6fb72d | 834 | for (i = 0; i < count_handles; i++) { |
e7aca503 JE |
835 | syncobjs[i] = drm_syncobj_find(file_private, handles[i]); |
836 | if (!syncobjs[i]) { | |
837 | ret = -ENOENT; | |
3e6fb72d | 838 | goto err_put_syncobjs; |
e7aca503 | 839 | } |
5e60a10e DA |
840 | } |
841 | ||
3e6fb72d JE |
842 | kfree(handles); |
843 | *syncobjs_out = syncobjs; | |
844 | return 0; | |
5e60a10e | 845 | |
3e6fb72d | 846 | err_put_syncobjs: |
e7aca503 JE |
847 | while (i-- > 0) |
848 | drm_syncobj_put(syncobjs[i]); | |
849 | kfree(syncobjs); | |
5e60a10e DA |
850 | err_free_handles: |
851 | kfree(handles); | |
852 | ||
853 | return ret; | |
854 | } | |
3e6fb72d JE |
855 | |
856 | static void drm_syncobj_array_free(struct drm_syncobj **syncobjs, | |
857 | uint32_t count) | |
858 | { | |
859 | uint32_t i; | |
860 | for (i = 0; i < count; i++) | |
861 | drm_syncobj_put(syncobjs[i]); | |
862 | kfree(syncobjs); | |
863 | } | |
864 | ||
865 | int | |
866 | drm_syncobj_wait_ioctl(struct drm_device *dev, void *data, | |
867 | struct drm_file *file_private) | |
868 | { | |
869 | struct drm_syncobj_wait *args = data; | |
870 | struct drm_syncobj **syncobjs; | |
871 | int ret = 0; | |
872 | ||
873 | if (!drm_core_check_feature(dev, DRIVER_SYNCOBJ)) | |
69fdf420 | 874 | return -EOPNOTSUPP; |
3e6fb72d JE |
875 | |
876 | if (args->flags & ~(DRM_SYNCOBJ_WAIT_FLAGS_WAIT_ALL | | |
877 | DRM_SYNCOBJ_WAIT_FLAGS_WAIT_FOR_SUBMIT)) | |
878 | return -EINVAL; | |
879 | ||
880 | if (args->count_handles == 0) | |
881 | return -EINVAL; | |
882 | ||
883 | ret = drm_syncobj_array_find(file_private, | |
884 | u64_to_user_ptr(args->handles), | |
885 | args->count_handles, | |
886 | &syncobjs); | |
887 | if (ret < 0) | |
888 | return ret; | |
889 | ||
890 | ret = drm_syncobj_array_wait(dev, file_private, | |
891 | args, syncobjs); | |
892 | ||
893 | drm_syncobj_array_free(syncobjs, args->count_handles); | |
894 | ||
895 | return ret; | |
896 | } | |
aa4035d2 JE |
897 | |
898 | int | |
899 | drm_syncobj_reset_ioctl(struct drm_device *dev, void *data, | |
900 | struct drm_file *file_private) | |
901 | { | |
902 | struct drm_syncobj_array *args = data; | |
903 | struct drm_syncobj **syncobjs; | |
904 | uint32_t i; | |
905 | int ret; | |
906 | ||
907 | if (!drm_core_check_feature(dev, DRIVER_SYNCOBJ)) | |
69fdf420 | 908 | return -EOPNOTSUPP; |
aa4035d2 JE |
909 | |
910 | if (args->pad != 0) | |
911 | return -EINVAL; | |
912 | ||
913 | if (args->count_handles == 0) | |
914 | return -EINVAL; | |
915 | ||
916 | ret = drm_syncobj_array_find(file_private, | |
917 | u64_to_user_ptr(args->handles), | |
918 | args->count_handles, | |
919 | &syncobjs); | |
920 | if (ret < 0) | |
921 | return ret; | |
922 | ||
131280a1 | 923 | for (i = 0; i < args->count_handles; i++) |
0b258ed1 | 924 | drm_syncobj_replace_fence(syncobjs[i], NULL); |
131280a1 | 925 | |
aa4035d2 JE |
926 | drm_syncobj_array_free(syncobjs, args->count_handles); |
927 | ||
131280a1 | 928 | return 0; |
aa4035d2 | 929 | } |
ffa9443f JE |
930 | |
931 | int | |
932 | drm_syncobj_signal_ioctl(struct drm_device *dev, void *data, | |
933 | struct drm_file *file_private) | |
934 | { | |
935 | struct drm_syncobj_array *args = data; | |
936 | struct drm_syncobj **syncobjs; | |
937 | uint32_t i; | |
938 | int ret; | |
939 | ||
940 | if (!drm_core_check_feature(dev, DRIVER_SYNCOBJ)) | |
69fdf420 | 941 | return -EOPNOTSUPP; |
ffa9443f JE |
942 | |
943 | if (args->pad != 0) | |
944 | return -EINVAL; | |
945 | ||
946 | if (args->count_handles == 0) | |
947 | return -EINVAL; | |
948 | ||
949 | ret = drm_syncobj_array_find(file_private, | |
950 | u64_to_user_ptr(args->handles), | |
951 | args->count_handles, | |
952 | &syncobjs); | |
953 | if (ret < 0) | |
954 | return ret; | |
955 | ||
86bbd89d CK |
956 | for (i = 0; i < args->count_handles; i++) |
957 | drm_syncobj_assign_null_handle(syncobjs[i]); | |
ffa9443f JE |
958 | |
959 | drm_syncobj_array_free(syncobjs, args->count_handles); | |
960 | ||
961 | return ret; | |
962 | } |