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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 | * | |
f246ff5c JE |
32 | * DRM synchronisation objects (syncobj, see struct &drm_syncobj) provide a |
33 | * container for a synchronization primitive which can be used by userspace | |
34 | * to explicitly synchronize GPU commands, can be shared between userspace | |
35 | * processes, and can be shared between different DRM drivers. | |
36 | * Their primary use-case is to implement Vulkan fences and semaphores. | |
37 | * The syncobj userspace API provides ioctls for several operations: | |
e9083420 | 38 | * |
f246ff5c JE |
39 | * - Creation and destruction of syncobjs |
40 | * - Import and export of syncobjs to/from a syncobj file descriptor | |
41 | * - Import and export a syncobj's underlying fence to/from a sync file | |
42 | * - Reset a syncobj (set its fence to NULL) | |
43 | * - Signal a syncobj (set a trivially signaled fence) | |
44 | * - Wait for a syncobj's fence to appear and be signaled | |
5e60a10e | 45 | * |
77d1a6db LL |
46 | * The syncobj userspace API also provides operations to manipulate a syncobj |
47 | * in terms of a timeline of struct &dma_fence_chain rather than a single | |
48 | * struct &dma_fence, through the following operations: | |
49 | * | |
50 | * - Signal a given point on the timeline | |
51 | * - Wait for a given point to appear and/or be signaled | |
52 | * - Import and export from/to a given point of a timeline | |
53 | * | |
f246ff5c JE |
54 | * At it's core, a syncobj is simply a wrapper around a pointer to a struct |
55 | * &dma_fence which may be NULL. | |
56 | * When a syncobj is first created, its pointer is either NULL or a pointer | |
57 | * to an already signaled fence depending on whether the | |
58 | * &DRM_SYNCOBJ_CREATE_SIGNALED flag is passed to | |
59 | * &DRM_IOCTL_SYNCOBJ_CREATE. | |
77d1a6db LL |
60 | * |
61 | * If the syncobj is considered as a binary (its state is either signaled or | |
62 | * unsignaled) primitive, when GPU work is enqueued in a DRM driver to signal | |
63 | * the syncobj, the syncobj's fence is replaced with a fence which will be | |
64 | * signaled by the completion of that work. | |
65 | * If the syncobj is considered as a timeline primitive, when GPU work is | |
66 | * enqueued in a DRM driver to signal the a given point of the syncobj, a new | |
67 | * struct &dma_fence_chain pointing to the DRM driver's fence and also | |
68 | * pointing to the previous fence that was in the syncobj. The new struct | |
69 | * &dma_fence_chain fence replace the syncobj's fence and will be signaled by | |
70 | * completion of the DRM driver's work and also any work associated with the | |
71 | * fence previously in the syncobj. | |
72 | * | |
73 | * When GPU work which waits on a syncobj is enqueued in a DRM driver, at the | |
74 | * time the work is enqueued, it waits on the syncobj's fence before | |
75 | * submitting the work to hardware. That fence is either : | |
76 | * | |
77 | * - The syncobj's current fence if the syncobj is considered as a binary | |
78 | * primitive. | |
79 | * - The struct &dma_fence associated with a given point if the syncobj is | |
80 | * considered as a timeline primitive. | |
81 | * | |
82 | * If the syncobj's fence is NULL or not present in the syncobj's timeline, | |
83 | * the enqueue operation is expected to fail. | |
84 | * | |
85 | * With binary syncobj, all manipulation of the syncobjs's fence happens in | |
86 | * terms of the current fence at the time the ioctl is called by userspace | |
87 | * regardless of whether that operation is an immediate host-side operation | |
88 | * (signal or reset) or or an operation which is enqueued in some driver | |
89 | * queue. &DRM_IOCTL_SYNCOBJ_RESET and &DRM_IOCTL_SYNCOBJ_SIGNAL can be used | |
90 | * to manipulate a syncobj from the host by resetting its pointer to NULL or | |
f246ff5c | 91 | * setting its pointer to a fence which is already signaled. |
e9083420 | 92 | * |
77d1a6db LL |
93 | * With a timeline syncobj, all manipulation of the synobj's fence happens in |
94 | * terms of a u64 value referring to point in the timeline. See | |
95 | * dma_fence_chain_find_seqno() to see how a given point is found in the | |
96 | * timeline. | |
97 | * | |
98 | * Note that applications should be careful to always use timeline set of | |
99 | * ioctl() when dealing with syncobj considered as timeline. Using a binary | |
100 | * set of ioctl() with a syncobj considered as timeline could result incorrect | |
101 | * synchronization. The use of binary syncobj is supported through the | |
102 | * timeline set of ioctl() by using a point value of 0, this will reproduce | |
103 | * the behavior of the binary set of ioctl() (for example replace the | |
104 | * syncobj's fence when signaling). | |
105 | * | |
e9083420 | 106 | * |
f246ff5c JE |
107 | * Host-side wait on syncobjs |
108 | * -------------------------- | |
109 | * | |
110 | * &DRM_IOCTL_SYNCOBJ_WAIT takes an array of syncobj handles and does a | |
111 | * host-side wait on all of the syncobj fences simultaneously. | |
112 | * If &DRM_SYNCOBJ_WAIT_FLAGS_WAIT_ALL is set, the wait ioctl will wait on | |
113 | * all of the syncobj fences to be signaled before it returns. | |
114 | * Otherwise, it returns once at least one syncobj fence has been signaled | |
115 | * and the index of a signaled fence is written back to the client. | |
116 | * | |
117 | * Unlike the enqueued GPU work dependencies which fail if they see a NULL | |
118 | * fence in a syncobj, if &DRM_SYNCOBJ_WAIT_FLAGS_WAIT_FOR_SUBMIT is set, | |
119 | * the host-side wait will first wait for the syncobj to receive a non-NULL | |
120 | * fence and then wait on that fence. | |
121 | * If &DRM_SYNCOBJ_WAIT_FLAGS_WAIT_FOR_SUBMIT is not set and any one of the | |
122 | * syncobjs in the array has a NULL fence, -EINVAL will be returned. | |
123 | * Assuming the syncobj starts off with a NULL fence, this allows a client | |
124 | * to do a host wait in one thread (or process) which waits on GPU work | |
125 | * submitted in another thread (or process) without having to manually | |
126 | * synchronize between the two. | |
127 | * This requirement is inherited from the Vulkan fence API. | |
128 | * | |
77d1a6db LL |
129 | * Similarly, &DRM_IOCTL_SYNCOBJ_TIMELINE_WAIT takes an array of syncobj |
130 | * handles as well as an array of u64 points and does a host-side wait on all | |
131 | * of syncobj fences at the given points simultaneously. | |
132 | * | |
133 | * &DRM_IOCTL_SYNCOBJ_TIMELINE_WAIT also adds the ability to wait for a given | |
134 | * fence to materialize on the timeline without waiting for the fence to be | |
135 | * signaled by using the &DRM_SYNCOBJ_WAIT_FLAGS_WAIT_AVAILABLE flag. This | |
136 | * requirement is inherited from the wait-before-signal behavior required by | |
137 | * the Vulkan timeline semaphore API. | |
138 | * | |
f246ff5c JE |
139 | * |
140 | * Import/export of syncobjs | |
141 | * ------------------------- | |
142 | * | |
143 | * &DRM_IOCTL_SYNCOBJ_FD_TO_HANDLE and &DRM_IOCTL_SYNCOBJ_HANDLE_TO_FD | |
144 | * provide two mechanisms for import/export of syncobjs. | |
145 | * | |
146 | * The first lets the client import or export an entire syncobj to a file | |
147 | * descriptor. | |
148 | * These fd's are opaque and have no other use case, except passing the | |
149 | * syncobj between processes. | |
150 | * All exported file descriptors and any syncobj handles created as a | |
151 | * result of importing those file descriptors own a reference to the | |
152 | * same underlying struct &drm_syncobj and the syncobj can be used | |
153 | * persistently across all the processes with which it is shared. | |
154 | * The syncobj is freed only once the last reference is dropped. | |
155 | * Unlike dma-buf, importing a syncobj creates a new handle (with its own | |
156 | * reference) for every import instead of de-duplicating. | |
157 | * The primary use-case of this persistent import/export is for shared | |
158 | * Vulkan fences and semaphores. | |
159 | * | |
160 | * The second import/export mechanism, which is indicated by | |
161 | * &DRM_SYNCOBJ_FD_TO_HANDLE_FLAGS_IMPORT_SYNC_FILE or | |
162 | * &DRM_SYNCOBJ_HANDLE_TO_FD_FLAGS_EXPORT_SYNC_FILE lets the client | |
163 | * import/export the syncobj's current fence from/to a &sync_file. | |
164 | * When a syncobj is exported to a sync file, that sync file wraps the | |
165 | * sycnobj's fence at the time of export and any later signal or reset | |
166 | * operations on the syncobj will not affect the exported sync file. | |
167 | * When a sync file is imported into a syncobj, the syncobj's fence is set | |
168 | * to the fence wrapped by that sync file. | |
169 | * Because sync files are immutable, resetting or signaling the syncobj | |
170 | * will not affect any sync files whose fences have been imported into the | |
171 | * syncobj. | |
77d1a6db LL |
172 | * |
173 | * | |
174 | * Import/export of timeline points in timeline syncobjs | |
175 | * ----------------------------------------------------- | |
176 | * | |
177 | * &DRM_IOCTL_SYNCOBJ_TRANSFER provides a mechanism to transfer a struct | |
178 | * &dma_fence_chain of a syncobj at a given u64 point to another u64 point | |
179 | * into another syncobj. | |
180 | * | |
181 | * Note that if you want to transfer a struct &dma_fence_chain from a given | |
182 | * point on a timeline syncobj from/into a binary syncobj, you can use the | |
183 | * point 0 to mean take/replace the fence in the syncobj. | |
e9083420 DA |
184 | */ |
185 | ||
0500c04e | 186 | #include <linux/anon_inodes.h> |
e9083420 DA |
187 | #include <linux/file.h> |
188 | #include <linux/fs.h> | |
e7aca503 | 189 | #include <linux/sched/signal.h> |
0500c04e SR |
190 | #include <linux/sync_file.h> |
191 | #include <linux/uaccess.h> | |
e9083420 | 192 | |
d89281c5 | 193 | #include <drm/drm.h> |
0500c04e SR |
194 | #include <drm/drm_drv.h> |
195 | #include <drm/drm_file.h> | |
196 | #include <drm/drm_gem.h> | |
197 | #include <drm/drm_print.h> | |
e9083420 | 198 | #include <drm/drm_syncobj.h> |
b9436986 | 199 | #include <drm/drm_utils.h> |
e9083420 | 200 | |
0500c04e SR |
201 | #include "drm_internal.h" |
202 | ||
61a98b1b CK |
203 | struct syncobj_wait_entry { |
204 | struct list_head node; | |
205 | struct task_struct *task; | |
206 | struct dma_fence *fence; | |
207 | struct dma_fence_cb fence_cb; | |
01d6c357 | 208 | u64 point; |
61a98b1b CK |
209 | }; |
210 | ||
211 | static void syncobj_wait_syncobj_func(struct drm_syncobj *syncobj, | |
212 | struct syncobj_wait_entry *wait); | |
213 | ||
e9083420 DA |
214 | /** |
215 | * drm_syncobj_find - lookup and reference a sync object. | |
216 | * @file_private: drm file private pointer | |
217 | * @handle: sync object handle to lookup. | |
218 | * | |
924fe8df DV |
219 | * Returns a reference to the syncobj pointed to by handle or NULL. The |
220 | * reference must be released by calling drm_syncobj_put(). | |
e9083420 DA |
221 | */ |
222 | struct drm_syncobj *drm_syncobj_find(struct drm_file *file_private, | |
223 | u32 handle) | |
224 | { | |
225 | struct drm_syncobj *syncobj; | |
226 | ||
227 | spin_lock(&file_private->syncobj_table_lock); | |
228 | ||
229 | /* Check if we currently have a reference on the object */ | |
230 | syncobj = idr_find(&file_private->syncobj_idr, handle); | |
231 | if (syncobj) | |
232 | drm_syncobj_get(syncobj); | |
233 | ||
234 | spin_unlock(&file_private->syncobj_table_lock); | |
235 | ||
236 | return syncobj; | |
237 | } | |
238 | EXPORT_SYMBOL(drm_syncobj_find); | |
239 | ||
61a98b1b CK |
240 | static void drm_syncobj_fence_add_wait(struct drm_syncobj *syncobj, |
241 | struct syncobj_wait_entry *wait) | |
9c19fb10 | 242 | { |
01d6c357 CZ |
243 | struct dma_fence *fence; |
244 | ||
61a98b1b CK |
245 | if (wait->fence) |
246 | return; | |
43cf1fc0 | 247 | |
131280a1 EA |
248 | spin_lock(&syncobj->lock); |
249 | /* We've already tried once to get a fence and failed. Now that we | |
250 | * have the lock, try one more time just to be sure we don't add a | |
251 | * callback when a fence has already been set. | |
252 | */ | |
01d6c357 CZ |
253 | fence = dma_fence_get(rcu_dereference_protected(syncobj->fence, 1)); |
254 | if (!fence || dma_fence_chain_find_seqno(&fence, wait->point)) { | |
255 | dma_fence_put(fence); | |
61a98b1b | 256 | list_add_tail(&wait->node, &syncobj->cb_list); |
01d6c357 CZ |
257 | } else if (!fence) { |
258 | wait->fence = dma_fence_get_stub(); | |
259 | } else { | |
260 | wait->fence = fence; | |
261 | } | |
131280a1 | 262 | spin_unlock(&syncobj->lock); |
48197bc5 CZ |
263 | } |
264 | ||
61a98b1b CK |
265 | static void drm_syncobj_remove_wait(struct drm_syncobj *syncobj, |
266 | struct syncobj_wait_entry *wait) | |
48197bc5 | 267 | { |
61a98b1b CK |
268 | if (!wait->node.next) |
269 | return; | |
48197bc5 | 270 | |
131280a1 | 271 | spin_lock(&syncobj->lock); |
61a98b1b | 272 | list_del_init(&wait->node); |
131280a1 | 273 | spin_unlock(&syncobj->lock); |
48197bc5 CZ |
274 | } |
275 | ||
44f8a139 CK |
276 | /** |
277 | * drm_syncobj_add_point - add new timeline point to the syncobj | |
278 | * @syncobj: sync object to add timeline point do | |
279 | * @chain: chain node to use to add the point | |
280 | * @fence: fence to encapsulate in the chain node | |
281 | * @point: sequence number to use for the point | |
282 | * | |
283 | * Add the chain node as new timeline point to the syncobj. | |
284 | */ | |
285 | void drm_syncobj_add_point(struct drm_syncobj *syncobj, | |
286 | struct dma_fence_chain *chain, | |
287 | struct dma_fence *fence, | |
288 | uint64_t point) | |
289 | { | |
290 | struct syncobj_wait_entry *cur, *tmp; | |
291 | struct dma_fence *prev; | |
292 | ||
293 | dma_fence_get(fence); | |
294 | ||
295 | spin_lock(&syncobj->lock); | |
296 | ||
297 | prev = drm_syncobj_fence_get(syncobj); | |
298 | /* You are adding an unorder point to timeline, which could cause payload returned from query_ioctl is 0! */ | |
299 | if (prev && prev->seqno >= point) | |
70eca5d5 | 300 | DRM_DEBUG("You are adding an unorder point to timeline!\n"); |
44f8a139 CK |
301 | dma_fence_chain_init(chain, prev, fence, point); |
302 | rcu_assign_pointer(syncobj->fence, &chain->base); | |
303 | ||
01d6c357 | 304 | list_for_each_entry_safe(cur, tmp, &syncobj->cb_list, node) |
44f8a139 | 305 | syncobj_wait_syncobj_func(syncobj, cur); |
44f8a139 CK |
306 | spin_unlock(&syncobj->lock); |
307 | ||
308 | /* Walk the chain once to trigger garbage collection */ | |
309 | dma_fence_chain_for_each(fence, prev); | |
310 | dma_fence_put(prev); | |
311 | } | |
312 | EXPORT_SYMBOL(drm_syncobj_add_point); | |
313 | ||
e9083420 DA |
314 | /** |
315 | * drm_syncobj_replace_fence - replace fence in a sync object. | |
e9083420 DA |
316 | * @syncobj: Sync object to replace fence in |
317 | * @fence: fence to install in sync file. | |
318 | * | |
0b258ed1 | 319 | * This replaces the fence on a sync object. |
e9083420 | 320 | */ |
00fc2c26 | 321 | void drm_syncobj_replace_fence(struct drm_syncobj *syncobj, |
e9083420 DA |
322 | struct dma_fence *fence) |
323 | { | |
131280a1 | 324 | struct dma_fence *old_fence; |
61a98b1b | 325 | struct syncobj_wait_entry *cur, *tmp; |
131280a1 EA |
326 | |
327 | if (fence) | |
328 | dma_fence_get(fence); | |
329 | ||
330 | spin_lock(&syncobj->lock); | |
331 | ||
332 | old_fence = rcu_dereference_protected(syncobj->fence, | |
333 | lockdep_is_held(&syncobj->lock)); | |
334 | rcu_assign_pointer(syncobj->fence, fence); | |
9c19fb10 | 335 | |
131280a1 | 336 | if (fence != old_fence) { |
01d6c357 | 337 | list_for_each_entry_safe(cur, tmp, &syncobj->cb_list, node) |
61a98b1b | 338 | syncobj_wait_syncobj_func(syncobj, cur); |
9c19fb10 | 339 | } |
131280a1 EA |
340 | |
341 | spin_unlock(&syncobj->lock); | |
342 | ||
343 | dma_fence_put(old_fence); | |
e9083420 DA |
344 | } |
345 | EXPORT_SYMBOL(drm_syncobj_replace_fence); | |
346 | ||
86bbd89d CK |
347 | /** |
348 | * drm_syncobj_assign_null_handle - assign a stub fence to the sync object | |
349 | * @syncobj: sync object to assign the fence on | |
350 | * | |
351 | * Assign a already signaled stub fence to the sync object. | |
352 | */ | |
fd921693 | 353 | static int drm_syncobj_assign_null_handle(struct drm_syncobj *syncobj) |
1fc08218 | 354 | { |
fd921693 DS |
355 | struct dma_fence *fence = dma_fence_allocate_private_stub(); |
356 | ||
357 | if (IS_ERR(fence)) | |
358 | return PTR_ERR(fence); | |
1fc08218 | 359 | |
0b258ed1 | 360 | drm_syncobj_replace_fence(syncobj, fence); |
86bbd89d | 361 | dma_fence_put(fence); |
fd921693 | 362 | return 0; |
1fc08218 JE |
363 | } |
364 | ||
bc9c80fe CK |
365 | /* 5s default for wait submission */ |
366 | #define DRM_SYNCOBJ_WAIT_FOR_SUBMIT_TIMEOUT 5000000000ULL | |
924fe8df DV |
367 | /** |
368 | * drm_syncobj_find_fence - lookup and reference the fence in a sync object | |
369 | * @file_private: drm file private pointer | |
370 | * @handle: sync object handle to lookup. | |
0a6730ea | 371 | * @point: timeline point |
871edc96 | 372 | * @flags: DRM_SYNCOBJ_WAIT_FLAGS_WAIT_FOR_SUBMIT or not |
924fe8df DV |
373 | * @fence: out parameter for the fence |
374 | * | |
375 | * This is just a convenience function that combines drm_syncobj_find() and | |
131280a1 | 376 | * drm_syncobj_fence_get(). |
924fe8df DV |
377 | * |
378 | * Returns 0 on success or a negative error value on failure. On success @fence | |
379 | * contains a reference to the fence, which must be released by calling | |
380 | * dma_fence_put(). | |
381 | */ | |
afaf5923 | 382 | int drm_syncobj_find_fence(struct drm_file *file_private, |
649fdce2 | 383 | u32 handle, u64 point, u64 flags, |
afaf5923 | 384 | struct dma_fence **fence) |
e9083420 DA |
385 | { |
386 | struct drm_syncobj *syncobj = drm_syncobj_find(file_private, handle); | |
bc9c80fe CK |
387 | struct syncobj_wait_entry wait; |
388 | u64 timeout = nsecs_to_jiffies64(DRM_SYNCOBJ_WAIT_FOR_SUBMIT_TIMEOUT); | |
389 | int ret; | |
e9083420 | 390 | |
131280a1 EA |
391 | if (!syncobj) |
392 | return -ENOENT; | |
393 | ||
7621350c CK |
394 | /* Waiting for userspace with locks help is illegal cause that can |
395 | * trivial deadlock with page faults for example. Make lockdep complain | |
396 | * about it early on. | |
397 | */ | |
398 | if (flags & DRM_SYNCOBJ_WAIT_FLAGS_WAIT_FOR_SUBMIT) { | |
399 | might_sleep(); | |
400 | lockdep_assert_none_held_once(); | |
401 | } | |
402 | ||
131280a1 | 403 | *fence = drm_syncobj_fence_get(syncobj); |
bc9c80fe CK |
404 | |
405 | if (*fence) { | |
406 | ret = dma_fence_chain_find_seqno(fence, point); | |
407 | if (!ret) | |
a37eef63 | 408 | goto out; |
bc9c80fe CK |
409 | dma_fence_put(*fence); |
410 | } else { | |
131280a1 EA |
411 | ret = -EINVAL; |
412 | } | |
bc9c80fe CK |
413 | |
414 | if (!(flags & DRM_SYNCOBJ_WAIT_FLAGS_WAIT_FOR_SUBMIT)) | |
a37eef63 | 415 | goto out; |
bc9c80fe CK |
416 | |
417 | memset(&wait, 0, sizeof(wait)); | |
418 | wait.task = current; | |
419 | wait.point = point; | |
420 | drm_syncobj_fence_add_wait(syncobj, &wait); | |
421 | ||
422 | do { | |
423 | set_current_state(TASK_INTERRUPTIBLE); | |
424 | if (wait.fence) { | |
425 | ret = 0; | |
426 | break; | |
427 | } | |
428 | if (timeout == 0) { | |
429 | ret = -ETIME; | |
430 | break; | |
431 | } | |
432 | ||
433 | if (signal_pending(current)) { | |
434 | ret = -ERESTARTSYS; | |
435 | break; | |
436 | } | |
437 | ||
438 | timeout = schedule_timeout(timeout); | |
439 | } while (1); | |
440 | ||
441 | __set_current_state(TASK_RUNNING); | |
442 | *fence = wait.fence; | |
443 | ||
444 | if (wait.node.next) | |
445 | drm_syncobj_remove_wait(syncobj, &wait); | |
446 | ||
a37eef63 DV |
447 | out: |
448 | drm_syncobj_put(syncobj); | |
449 | ||
e9083420 DA |
450 | return ret; |
451 | } | |
afaf5923 | 452 | EXPORT_SYMBOL(drm_syncobj_find_fence); |
e9083420 DA |
453 | |
454 | /** | |
455 | * drm_syncobj_free - free a sync object. | |
456 | * @kref: kref to free. | |
457 | * | |
458 | * Only to be called from kref_put in drm_syncobj_put. | |
459 | */ | |
460 | void drm_syncobj_free(struct kref *kref) | |
461 | { | |
462 | struct drm_syncobj *syncobj = container_of(kref, | |
463 | struct drm_syncobj, | |
464 | refcount); | |
0b258ed1 | 465 | drm_syncobj_replace_fence(syncobj, NULL); |
e9083420 DA |
466 | kfree(syncobj); |
467 | } | |
468 | EXPORT_SYMBOL(drm_syncobj_free); | |
469 | ||
1321fd2c MO |
470 | /** |
471 | * drm_syncobj_create - create a new syncobj | |
472 | * @out_syncobj: returned syncobj | |
473 | * @flags: DRM_SYNCOBJ_* flags | |
474 | * @fence: if non-NULL, the syncobj will represent this fence | |
924fe8df DV |
475 | * |
476 | * This is the first function to create a sync object. After creating, drivers | |
477 | * probably want to make it available to userspace, either through | |
478 | * drm_syncobj_get_handle() or drm_syncobj_get_fd(). | |
479 | * | |
480 | * Returns 0 on success or a negative error value on failure. | |
1321fd2c MO |
481 | */ |
482 | int drm_syncobj_create(struct drm_syncobj **out_syncobj, uint32_t flags, | |
483 | struct dma_fence *fence) | |
e9083420 | 484 | { |
fd921693 | 485 | int ret; |
e9083420 DA |
486 | struct drm_syncobj *syncobj; |
487 | ||
488 | syncobj = kzalloc(sizeof(struct drm_syncobj), GFP_KERNEL); | |
489 | if (!syncobj) | |
490 | return -ENOMEM; | |
491 | ||
492 | kref_init(&syncobj->refcount); | |
9c19fb10 | 493 | INIT_LIST_HEAD(&syncobj->cb_list); |
131280a1 | 494 | spin_lock_init(&syncobj->lock); |
e9083420 | 495 | |
fd921693 DS |
496 | if (flags & DRM_SYNCOBJ_CREATE_SIGNALED) { |
497 | ret = drm_syncobj_assign_null_handle(syncobj); | |
498 | if (ret < 0) { | |
499 | drm_syncobj_put(syncobj); | |
500 | return ret; | |
501 | } | |
502 | } | |
1fc08218 | 503 | |
1321fd2c | 504 | if (fence) |
0b258ed1 | 505 | drm_syncobj_replace_fence(syncobj, fence); |
1321fd2c MO |
506 | |
507 | *out_syncobj = syncobj; | |
508 | return 0; | |
509 | } | |
510 | EXPORT_SYMBOL(drm_syncobj_create); | |
511 | ||
512 | /** | |
513 | * drm_syncobj_get_handle - get a handle from a syncobj | |
924fe8df DV |
514 | * @file_private: drm file private pointer |
515 | * @syncobj: Sync object to export | |
516 | * @handle: out parameter with the new handle | |
517 | * | |
518 | * Exports a sync object created with drm_syncobj_create() as a handle on | |
519 | * @file_private to userspace. | |
520 | * | |
521 | * Returns 0 on success or a negative error value on failure. | |
1321fd2c MO |
522 | */ |
523 | int drm_syncobj_get_handle(struct drm_file *file_private, | |
524 | struct drm_syncobj *syncobj, u32 *handle) | |
525 | { | |
526 | int ret; | |
527 | ||
528 | /* take a reference to put in the idr */ | |
529 | drm_syncobj_get(syncobj); | |
530 | ||
e9083420 DA |
531 | idr_preload(GFP_KERNEL); |
532 | spin_lock(&file_private->syncobj_table_lock); | |
533 | ret = idr_alloc(&file_private->syncobj_idr, syncobj, 1, 0, GFP_NOWAIT); | |
534 | spin_unlock(&file_private->syncobj_table_lock); | |
535 | ||
536 | idr_preload_end(); | |
537 | ||
538 | if (ret < 0) { | |
539 | drm_syncobj_put(syncobj); | |
540 | return ret; | |
541 | } | |
542 | ||
543 | *handle = ret; | |
544 | return 0; | |
545 | } | |
1321fd2c MO |
546 | EXPORT_SYMBOL(drm_syncobj_get_handle); |
547 | ||
548 | static int drm_syncobj_create_as_handle(struct drm_file *file_private, | |
549 | u32 *handle, uint32_t flags) | |
550 | { | |
551 | int ret; | |
552 | struct drm_syncobj *syncobj; | |
553 | ||
554 | ret = drm_syncobj_create(&syncobj, flags, NULL); | |
555 | if (ret) | |
556 | return ret; | |
557 | ||
558 | ret = drm_syncobj_get_handle(file_private, syncobj, handle); | |
559 | drm_syncobj_put(syncobj); | |
560 | return ret; | |
561 | } | |
e9083420 DA |
562 | |
563 | static int drm_syncobj_destroy(struct drm_file *file_private, | |
564 | u32 handle) | |
565 | { | |
566 | struct drm_syncobj *syncobj; | |
567 | ||
568 | spin_lock(&file_private->syncobj_table_lock); | |
569 | syncobj = idr_remove(&file_private->syncobj_idr, handle); | |
570 | spin_unlock(&file_private->syncobj_table_lock); | |
571 | ||
572 | if (!syncobj) | |
573 | return -EINVAL; | |
574 | ||
575 | drm_syncobj_put(syncobj); | |
576 | return 0; | |
577 | } | |
578 | ||
579 | static int drm_syncobj_file_release(struct inode *inode, struct file *file) | |
580 | { | |
581 | struct drm_syncobj *syncobj = file->private_data; | |
582 | ||
583 | drm_syncobj_put(syncobj); | |
584 | return 0; | |
585 | } | |
586 | ||
587 | static const struct file_operations drm_syncobj_file_fops = { | |
588 | .release = drm_syncobj_file_release, | |
589 | }; | |
590 | ||
924fe8df DV |
591 | /** |
592 | * drm_syncobj_get_fd - get a file descriptor from a syncobj | |
593 | * @syncobj: Sync object to export | |
594 | * @p_fd: out parameter with the new file descriptor | |
595 | * | |
596 | * Exports a sync object created with drm_syncobj_create() as a file descriptor. | |
597 | * | |
598 | * Returns 0 on success or a negative error value on failure. | |
599 | */ | |
684fd0af | 600 | int drm_syncobj_get_fd(struct drm_syncobj *syncobj, int *p_fd) |
e9083420 | 601 | { |
e7cdf5c8 | 602 | struct file *file; |
e9083420 DA |
603 | int fd; |
604 | ||
e9083420 | 605 | fd = get_unused_fd_flags(O_CLOEXEC); |
684fd0af | 606 | if (fd < 0) |
e9083420 | 607 | return fd; |
e9083420 | 608 | |
e7cdf5c8 CW |
609 | file = anon_inode_getfile("syncobj_file", |
610 | &drm_syncobj_file_fops, | |
611 | syncobj, 0); | |
612 | if (IS_ERR(file)) { | |
613 | put_unused_fd(fd); | |
614 | return PTR_ERR(file); | |
e9083420 | 615 | } |
e7cdf5c8 CW |
616 | |
617 | drm_syncobj_get(syncobj); | |
618 | fd_install(fd, file); | |
619 | ||
e9083420 DA |
620 | *p_fd = fd; |
621 | return 0; | |
684fd0af MO |
622 | } |
623 | EXPORT_SYMBOL(drm_syncobj_get_fd); | |
624 | ||
625 | static int drm_syncobj_handle_to_fd(struct drm_file *file_private, | |
626 | u32 handle, int *p_fd) | |
627 | { | |
628 | struct drm_syncobj *syncobj = drm_syncobj_find(file_private, handle); | |
629 | int ret; | |
630 | ||
631 | if (!syncobj) | |
632 | return -EINVAL; | |
633 | ||
634 | ret = drm_syncobj_get_fd(syncobj, p_fd); | |
e9083420 DA |
635 | drm_syncobj_put(syncobj); |
636 | return ret; | |
637 | } | |
638 | ||
e9083420 DA |
639 | static int drm_syncobj_fd_to_handle(struct drm_file *file_private, |
640 | int fd, u32 *handle) | |
641 | { | |
e7cdf5c8 | 642 | struct drm_syncobj *syncobj; |
fb386243 | 643 | struct fd f = fdget(fd); |
e9083420 DA |
644 | int ret; |
645 | ||
fb386243 | 646 | if (!f.file) |
e9083420 DA |
647 | return -EINVAL; |
648 | ||
fb386243 AV |
649 | if (f.file->f_op != &drm_syncobj_file_fops) { |
650 | fdput(f); | |
e7cdf5c8 CW |
651 | return -EINVAL; |
652 | } | |
653 | ||
e9083420 | 654 | /* take a reference to put in the idr */ |
fb386243 | 655 | syncobj = f.file->private_data; |
e9083420 DA |
656 | drm_syncobj_get(syncobj); |
657 | ||
658 | idr_preload(GFP_KERNEL); | |
659 | spin_lock(&file_private->syncobj_table_lock); | |
660 | ret = idr_alloc(&file_private->syncobj_idr, syncobj, 1, 0, GFP_NOWAIT); | |
661 | spin_unlock(&file_private->syncobj_table_lock); | |
662 | idr_preload_end(); | |
663 | ||
e7cdf5c8 CW |
664 | if (ret > 0) { |
665 | *handle = ret; | |
666 | ret = 0; | |
667 | } else | |
668 | drm_syncobj_put(syncobj); | |
669 | ||
fb386243 | 670 | fdput(f); |
e7cdf5c8 | 671 | return ret; |
e9083420 DA |
672 | } |
673 | ||
a32c94af VS |
674 | static int drm_syncobj_import_sync_file_fence(struct drm_file *file_private, |
675 | int fd, int handle) | |
3ee45a3b DA |
676 | { |
677 | struct dma_fence *fence = sync_file_get_fence(fd); | |
678 | struct drm_syncobj *syncobj; | |
679 | ||
680 | if (!fence) | |
681 | return -EINVAL; | |
682 | ||
683 | syncobj = drm_syncobj_find(file_private, handle); | |
684 | if (!syncobj) { | |
685 | dma_fence_put(fence); | |
686 | return -ENOENT; | |
687 | } | |
688 | ||
0b258ed1 | 689 | drm_syncobj_replace_fence(syncobj, fence); |
3ee45a3b DA |
690 | dma_fence_put(fence); |
691 | drm_syncobj_put(syncobj); | |
692 | return 0; | |
693 | } | |
694 | ||
a32c94af VS |
695 | static int drm_syncobj_export_sync_file(struct drm_file *file_private, |
696 | int handle, int *p_fd) | |
3ee45a3b DA |
697 | { |
698 | int ret; | |
699 | struct dma_fence *fence; | |
700 | struct sync_file *sync_file; | |
701 | int fd = get_unused_fd_flags(O_CLOEXEC); | |
702 | ||
703 | if (fd < 0) | |
704 | return fd; | |
705 | ||
649fdce2 | 706 | ret = drm_syncobj_find_fence(file_private, handle, 0, 0, &fence); |
3ee45a3b DA |
707 | if (ret) |
708 | goto err_put_fd; | |
709 | ||
710 | sync_file = sync_file_create(fence); | |
711 | ||
712 | dma_fence_put(fence); | |
713 | ||
714 | if (!sync_file) { | |
715 | ret = -EINVAL; | |
716 | goto err_put_fd; | |
717 | } | |
718 | ||
719 | fd_install(fd, sync_file->file); | |
720 | ||
721 | *p_fd = fd; | |
722 | return 0; | |
723 | err_put_fd: | |
724 | put_unused_fd(fd); | |
725 | return ret; | |
726 | } | |
e9083420 DA |
727 | /** |
728 | * drm_syncobj_open - initalizes syncobj file-private structures at devnode open time | |
e9083420 DA |
729 | * @file_private: drm file-private structure to set up |
730 | * | |
731 | * Called at device open time, sets up the structure for handling refcounting | |
732 | * of sync objects. | |
733 | */ | |
734 | void | |
735 | drm_syncobj_open(struct drm_file *file_private) | |
736 | { | |
e86584c5 | 737 | idr_init_base(&file_private->syncobj_idr, 1); |
e9083420 DA |
738 | spin_lock_init(&file_private->syncobj_table_lock); |
739 | } | |
740 | ||
741 | static int | |
742 | drm_syncobj_release_handle(int id, void *ptr, void *data) | |
743 | { | |
744 | struct drm_syncobj *syncobj = ptr; | |
745 | ||
746 | drm_syncobj_put(syncobj); | |
747 | return 0; | |
748 | } | |
749 | ||
750 | /** | |
751 | * drm_syncobj_release - release file-private sync object resources | |
e9083420 DA |
752 | * @file_private: drm file-private structure to clean up |
753 | * | |
754 | * Called at close time when the filp is going away. | |
755 | * | |
756 | * Releases any remaining references on objects by this filp. | |
757 | */ | |
758 | void | |
759 | drm_syncobj_release(struct drm_file *file_private) | |
760 | { | |
761 | idr_for_each(&file_private->syncobj_idr, | |
762 | &drm_syncobj_release_handle, file_private); | |
763 | idr_destroy(&file_private->syncobj_idr); | |
764 | } | |
765 | ||
766 | int | |
767 | drm_syncobj_create_ioctl(struct drm_device *dev, void *data, | |
768 | struct drm_file *file_private) | |
769 | { | |
770 | struct drm_syncobj_create *args = data; | |
771 | ||
772 | if (!drm_core_check_feature(dev, DRIVER_SYNCOBJ)) | |
69fdf420 | 773 | return -EOPNOTSUPP; |
e9083420 DA |
774 | |
775 | /* no valid flags yet */ | |
131280a1 | 776 | if (args->flags & ~DRM_SYNCOBJ_CREATE_SIGNALED) |
e9083420 DA |
777 | return -EINVAL; |
778 | ||
1321fd2c MO |
779 | return drm_syncobj_create_as_handle(file_private, |
780 | &args->handle, args->flags); | |
e9083420 DA |
781 | } |
782 | ||
783 | int | |
784 | drm_syncobj_destroy_ioctl(struct drm_device *dev, void *data, | |
785 | struct drm_file *file_private) | |
786 | { | |
787 | struct drm_syncobj_destroy *args = data; | |
788 | ||
789 | if (!drm_core_check_feature(dev, DRIVER_SYNCOBJ)) | |
69fdf420 | 790 | return -EOPNOTSUPP; |
e9083420 DA |
791 | |
792 | /* make sure padding is empty */ | |
793 | if (args->pad) | |
794 | return -EINVAL; | |
795 | return drm_syncobj_destroy(file_private, args->handle); | |
796 | } | |
797 | ||
798 | int | |
799 | drm_syncobj_handle_to_fd_ioctl(struct drm_device *dev, void *data, | |
800 | struct drm_file *file_private) | |
801 | { | |
802 | struct drm_syncobj_handle *args = data; | |
803 | ||
804 | if (!drm_core_check_feature(dev, DRIVER_SYNCOBJ)) | |
69fdf420 | 805 | return -EOPNOTSUPP; |
e9083420 | 806 | |
3ee45a3b | 807 | if (args->pad) |
e9083420 DA |
808 | return -EINVAL; |
809 | ||
3ee45a3b DA |
810 | if (args->flags != 0 && |
811 | args->flags != DRM_SYNCOBJ_HANDLE_TO_FD_FLAGS_EXPORT_SYNC_FILE) | |
812 | return -EINVAL; | |
813 | ||
814 | if (args->flags & DRM_SYNCOBJ_HANDLE_TO_FD_FLAGS_EXPORT_SYNC_FILE) | |
815 | return drm_syncobj_export_sync_file(file_private, args->handle, | |
816 | &args->fd); | |
817 | ||
e9083420 DA |
818 | return drm_syncobj_handle_to_fd(file_private, args->handle, |
819 | &args->fd); | |
820 | } | |
821 | ||
822 | int | |
823 | drm_syncobj_fd_to_handle_ioctl(struct drm_device *dev, void *data, | |
824 | struct drm_file *file_private) | |
825 | { | |
826 | struct drm_syncobj_handle *args = data; | |
827 | ||
828 | if (!drm_core_check_feature(dev, DRIVER_SYNCOBJ)) | |
69fdf420 | 829 | return -EOPNOTSUPP; |
e9083420 | 830 | |
3ee45a3b DA |
831 | if (args->pad) |
832 | return -EINVAL; | |
833 | ||
834 | if (args->flags != 0 && | |
835 | args->flags != DRM_SYNCOBJ_FD_TO_HANDLE_FLAGS_IMPORT_SYNC_FILE) | |
e9083420 DA |
836 | return -EINVAL; |
837 | ||
3ee45a3b DA |
838 | if (args->flags & DRM_SYNCOBJ_FD_TO_HANDLE_FLAGS_IMPORT_SYNC_FILE) |
839 | return drm_syncobj_import_sync_file_fence(file_private, | |
840 | args->fd, | |
841 | args->handle); | |
842 | ||
e9083420 DA |
843 | return drm_syncobj_fd_to_handle(file_private, args->fd, |
844 | &args->handle); | |
845 | } | |
5e60a10e | 846 | |
ea569910 CZ |
847 | static int drm_syncobj_transfer_to_timeline(struct drm_file *file_private, |
848 | struct drm_syncobj_transfer *args) | |
849 | { | |
850 | struct drm_syncobj *timeline_syncobj = NULL; | |
851 | struct dma_fence *fence; | |
852 | struct dma_fence_chain *chain; | |
853 | int ret; | |
854 | ||
855 | timeline_syncobj = drm_syncobj_find(file_private, args->dst_handle); | |
856 | if (!timeline_syncobj) { | |
857 | return -ENOENT; | |
858 | } | |
859 | ret = drm_syncobj_find_fence(file_private, args->src_handle, | |
860 | args->src_point, args->flags, | |
861 | &fence); | |
862 | if (ret) | |
863 | goto err; | |
864 | chain = kzalloc(sizeof(struct dma_fence_chain), GFP_KERNEL); | |
865 | if (!chain) { | |
866 | ret = -ENOMEM; | |
867 | goto err1; | |
868 | } | |
869 | drm_syncobj_add_point(timeline_syncobj, chain, fence, args->dst_point); | |
870 | err1: | |
871 | dma_fence_put(fence); | |
872 | err: | |
873 | drm_syncobj_put(timeline_syncobj); | |
874 | ||
875 | return ret; | |
876 | } | |
877 | ||
878 | static int | |
879 | drm_syncobj_transfer_to_binary(struct drm_file *file_private, | |
880 | struct drm_syncobj_transfer *args) | |
881 | { | |
882 | struct drm_syncobj *binary_syncobj = NULL; | |
883 | struct dma_fence *fence; | |
884 | int ret; | |
885 | ||
886 | binary_syncobj = drm_syncobj_find(file_private, args->dst_handle); | |
887 | if (!binary_syncobj) | |
888 | return -ENOENT; | |
889 | ret = drm_syncobj_find_fence(file_private, args->src_handle, | |
890 | args->src_point, args->flags, &fence); | |
891 | if (ret) | |
892 | goto err; | |
893 | drm_syncobj_replace_fence(binary_syncobj, fence); | |
894 | dma_fence_put(fence); | |
895 | err: | |
896 | drm_syncobj_put(binary_syncobj); | |
897 | ||
898 | return ret; | |
899 | } | |
900 | int | |
901 | drm_syncobj_transfer_ioctl(struct drm_device *dev, void *data, | |
902 | struct drm_file *file_private) | |
903 | { | |
904 | struct drm_syncobj_transfer *args = data; | |
905 | int ret; | |
906 | ||
060cebb2 | 907 | if (!drm_core_check_feature(dev, DRIVER_SYNCOBJ_TIMELINE)) |
5ec77638 | 908 | return -EOPNOTSUPP; |
ea569910 CZ |
909 | |
910 | if (args->pad) | |
911 | return -EINVAL; | |
912 | ||
913 | if (args->dst_point) | |
914 | ret = drm_syncobj_transfer_to_timeline(file_private, args); | |
915 | else | |
916 | ret = drm_syncobj_transfer_to_binary(file_private, args); | |
917 | ||
918 | return ret; | |
919 | } | |
920 | ||
e7aca503 JE |
921 | static void syncobj_wait_fence_func(struct dma_fence *fence, |
922 | struct dma_fence_cb *cb) | |
923 | { | |
924 | struct syncobj_wait_entry *wait = | |
925 | container_of(cb, struct syncobj_wait_entry, fence_cb); | |
926 | ||
927 | wake_up_process(wait->task); | |
928 | } | |
929 | ||
930 | static void syncobj_wait_syncobj_func(struct drm_syncobj *syncobj, | |
61a98b1b | 931 | struct syncobj_wait_entry *wait) |
e7aca503 | 932 | { |
01d6c357 CZ |
933 | struct dma_fence *fence; |
934 | ||
131280a1 | 935 | /* This happens inside the syncobj lock */ |
01d6c357 CZ |
936 | fence = rcu_dereference_protected(syncobj->fence, |
937 | lockdep_is_held(&syncobj->lock)); | |
938 | dma_fence_get(fence); | |
939 | if (!fence || dma_fence_chain_find_seqno(&fence, wait->point)) { | |
940 | dma_fence_put(fence); | |
941 | return; | |
942 | } else if (!fence) { | |
943 | wait->fence = dma_fence_get_stub(); | |
944 | } else { | |
945 | wait->fence = fence; | |
946 | } | |
947 | ||
e7aca503 | 948 | wake_up_process(wait->task); |
01d6c357 | 949 | list_del_init(&wait->node); |
e7aca503 JE |
950 | } |
951 | ||
952 | static signed long drm_syncobj_array_wait_timeout(struct drm_syncobj **syncobjs, | |
01d6c357 | 953 | void __user *user_points, |
e7aca503 JE |
954 | uint32_t count, |
955 | uint32_t flags, | |
956 | signed long timeout, | |
957 | uint32_t *idx) | |
958 | { | |
959 | struct syncobj_wait_entry *entries; | |
960 | struct dma_fence *fence; | |
01d6c357 | 961 | uint64_t *points; |
e7aca503 JE |
962 | uint32_t signaled_count, i; |
963 | ||
7621350c CK |
964 | if (flags & DRM_SYNCOBJ_WAIT_FLAGS_WAIT_FOR_SUBMIT) |
965 | lockdep_assert_none_held_once(); | |
966 | ||
01d6c357 CZ |
967 | points = kmalloc_array(count, sizeof(*points), GFP_KERNEL); |
968 | if (points == NULL) | |
e7aca503 JE |
969 | return -ENOMEM; |
970 | ||
01d6c357 CZ |
971 | if (!user_points) { |
972 | memset(points, 0, count * sizeof(uint64_t)); | |
973 | ||
974 | } else if (copy_from_user(points, user_points, | |
975 | sizeof(uint64_t) * count)) { | |
976 | timeout = -EFAULT; | |
977 | goto err_free_points; | |
978 | } | |
979 | ||
980 | entries = kcalloc(count, sizeof(*entries), GFP_KERNEL); | |
981 | if (!entries) { | |
982 | timeout = -ENOMEM; | |
983 | goto err_free_points; | |
984 | } | |
e7aca503 JE |
985 | /* Walk the list of sync objects and initialize entries. We do |
986 | * this up-front so that we can properly return -EINVAL if there is | |
987 | * a syncobj with a missing fence and then never have the chance of | |
988 | * returning -EINVAL again. | |
989 | */ | |
990 | signaled_count = 0; | |
991 | for (i = 0; i < count; ++i) { | |
01d6c357 CZ |
992 | struct dma_fence *fence; |
993 | ||
e7aca503 | 994 | entries[i].task = current; |
01d6c357 CZ |
995 | entries[i].point = points[i]; |
996 | fence = drm_syncobj_fence_get(syncobjs[i]); | |
997 | if (!fence || dma_fence_chain_find_seqno(&fence, points[i])) { | |
998 | dma_fence_put(fence); | |
e7aca503 JE |
999 | if (flags & DRM_SYNCOBJ_WAIT_FLAGS_WAIT_FOR_SUBMIT) { |
1000 | continue; | |
1001 | } else { | |
12fec62a | 1002 | timeout = -EINVAL; |
e7aca503 JE |
1003 | goto cleanup_entries; |
1004 | } | |
1005 | } | |
1006 | ||
01d6c357 CZ |
1007 | if (fence) |
1008 | entries[i].fence = fence; | |
1009 | else | |
1010 | entries[i].fence = dma_fence_get_stub(); | |
1011 | ||
1012 | if ((flags & DRM_SYNCOBJ_WAIT_FLAGS_WAIT_AVAILABLE) || | |
1013 | dma_fence_is_signaled(entries[i].fence)) { | |
e7aca503 JE |
1014 | if (signaled_count == 0 && idx) |
1015 | *idx = i; | |
1016 | signaled_count++; | |
1017 | } | |
1018 | } | |
1019 | ||
e7aca503 JE |
1020 | if (signaled_count == count || |
1021 | (signaled_count > 0 && | |
1022 | !(flags & DRM_SYNCOBJ_WAIT_FLAGS_WAIT_ALL))) | |
1023 | goto cleanup_entries; | |
1024 | ||
1025 | /* There's a very annoying laxness in the dma_fence API here, in | |
1026 | * that backends are not required to automatically report when a | |
1027 | * fence is signaled prior to fence->ops->enable_signaling() being | |
1028 | * called. So here if we fail to match signaled_count, we need to | |
1029 | * fallthough and try a 0 timeout wait! | |
1030 | */ | |
1031 | ||
1032 | if (flags & DRM_SYNCOBJ_WAIT_FLAGS_WAIT_FOR_SUBMIT) { | |
61a98b1b CK |
1033 | for (i = 0; i < count; ++i) |
1034 | drm_syncobj_fence_add_wait(syncobjs[i], &entries[i]); | |
e7aca503 JE |
1035 | } |
1036 | ||
1037 | do { | |
1038 | set_current_state(TASK_INTERRUPTIBLE); | |
1039 | ||
1040 | signaled_count = 0; | |
1041 | for (i = 0; i < count; ++i) { | |
1042 | fence = entries[i].fence; | |
1043 | if (!fence) | |
1044 | continue; | |
1045 | ||
01d6c357 CZ |
1046 | if ((flags & DRM_SYNCOBJ_WAIT_FLAGS_WAIT_AVAILABLE) || |
1047 | dma_fence_is_signaled(fence) || | |
e7aca503 JE |
1048 | (!entries[i].fence_cb.func && |
1049 | dma_fence_add_callback(fence, | |
1050 | &entries[i].fence_cb, | |
1051 | syncobj_wait_fence_func))) { | |
1052 | /* The fence has been signaled */ | |
1053 | if (flags & DRM_SYNCOBJ_WAIT_FLAGS_WAIT_ALL) { | |
1054 | signaled_count++; | |
1055 | } else { | |
1056 | if (idx) | |
1057 | *idx = i; | |
1058 | goto done_waiting; | |
1059 | } | |
1060 | } | |
1061 | } | |
1062 | ||
1063 | if (signaled_count == count) | |
1064 | goto done_waiting; | |
1065 | ||
1066 | if (timeout == 0) { | |
12fec62a | 1067 | timeout = -ETIME; |
e7aca503 JE |
1068 | goto done_waiting; |
1069 | } | |
1070 | ||
12fec62a CW |
1071 | if (signal_pending(current)) { |
1072 | timeout = -ERESTARTSYS; | |
1073 | goto done_waiting; | |
1074 | } | |
e7aca503 | 1075 | |
12fec62a CW |
1076 | timeout = schedule_timeout(timeout); |
1077 | } while (1); | |
e7aca503 JE |
1078 | |
1079 | done_waiting: | |
1080 | __set_current_state(TASK_RUNNING); | |
1081 | ||
1082 | cleanup_entries: | |
1083 | for (i = 0; i < count; ++i) { | |
61a98b1b | 1084 | drm_syncobj_remove_wait(syncobjs[i], &entries[i]); |
e7aca503 JE |
1085 | if (entries[i].fence_cb.func) |
1086 | dma_fence_remove_callback(entries[i].fence, | |
1087 | &entries[i].fence_cb); | |
1088 | dma_fence_put(entries[i].fence); | |
1089 | } | |
1090 | kfree(entries); | |
1091 | ||
01d6c357 CZ |
1092 | err_free_points: |
1093 | kfree(points); | |
1094 | ||
12fec62a | 1095 | return timeout; |
e7aca503 JE |
1096 | } |
1097 | ||
5e60a10e DA |
1098 | /** |
1099 | * drm_timeout_abs_to_jiffies - calculate jiffies timeout from absolute value | |
1100 | * | |
1101 | * @timeout_nsec: timeout nsec component in ns, 0 for poll | |
1102 | * | |
1103 | * Calculate the timeout in jiffies from an absolute time in sec/nsec. | |
1104 | */ | |
877b3729 | 1105 | signed long drm_timeout_abs_to_jiffies(int64_t timeout_nsec) |
5e60a10e DA |
1106 | { |
1107 | ktime_t abs_timeout, now; | |
1108 | u64 timeout_ns, timeout_jiffies64; | |
1109 | ||
1110 | /* make 0 timeout means poll - absolute 0 doesn't seem valid */ | |
1111 | if (timeout_nsec == 0) | |
1112 | return 0; | |
1113 | ||
1114 | abs_timeout = ns_to_ktime(timeout_nsec); | |
1115 | now = ktime_get(); | |
1116 | ||
1117 | if (!ktime_after(abs_timeout, now)) | |
1118 | return 0; | |
1119 | ||
1120 | timeout_ns = ktime_to_ns(ktime_sub(abs_timeout, now)); | |
1121 | ||
1122 | timeout_jiffies64 = nsecs_to_jiffies64(timeout_ns); | |
1123 | /* clamp timeout to avoid infinite timeout */ | |
1124 | if (timeout_jiffies64 >= MAX_SCHEDULE_TIMEOUT - 1) | |
1125 | return MAX_SCHEDULE_TIMEOUT - 1; | |
1126 | ||
1127 | return timeout_jiffies64 + 1; | |
1128 | } | |
877b3729 | 1129 | EXPORT_SYMBOL(drm_timeout_abs_to_jiffies); |
5e60a10e | 1130 | |
e7aca503 JE |
1131 | static int drm_syncobj_array_wait(struct drm_device *dev, |
1132 | struct drm_file *file_private, | |
1133 | struct drm_syncobj_wait *wait, | |
01d6c357 CZ |
1134 | struct drm_syncobj_timeline_wait *timeline_wait, |
1135 | struct drm_syncobj **syncobjs, bool timeline) | |
5e60a10e | 1136 | { |
01d6c357 | 1137 | signed long timeout = 0; |
5e60a10e DA |
1138 | uint32_t first = ~0; |
1139 | ||
01d6c357 CZ |
1140 | if (!timeline) { |
1141 | timeout = drm_timeout_abs_to_jiffies(wait->timeout_nsec); | |
1142 | timeout = drm_syncobj_array_wait_timeout(syncobjs, | |
1143 | NULL, | |
1144 | wait->count_handles, | |
1145 | wait->flags, | |
1146 | timeout, &first); | |
1147 | if (timeout < 0) | |
1148 | return timeout; | |
1149 | wait->first_signaled = first; | |
1150 | } else { | |
1151 | timeout = drm_timeout_abs_to_jiffies(timeline_wait->timeout_nsec); | |
1152 | timeout = drm_syncobj_array_wait_timeout(syncobjs, | |
1153 | u64_to_user_ptr(timeline_wait->points), | |
1154 | timeline_wait->count_handles, | |
1155 | timeline_wait->flags, | |
1156 | timeout, &first); | |
1157 | if (timeout < 0) | |
1158 | return timeout; | |
1159 | timeline_wait->first_signaled = first; | |
1160 | } | |
5e60a10e DA |
1161 | return 0; |
1162 | } | |
1163 | ||
3e6fb72d | 1164 | static int drm_syncobj_array_find(struct drm_file *file_private, |
9e554462 VS |
1165 | void __user *user_handles, |
1166 | uint32_t count_handles, | |
3e6fb72d | 1167 | struct drm_syncobj ***syncobjs_out) |
5e60a10e | 1168 | { |
3e6fb72d | 1169 | uint32_t i, *handles; |
e7aca503 | 1170 | struct drm_syncobj **syncobjs; |
3e6fb72d | 1171 | int ret; |
5e60a10e | 1172 | |
3e6fb72d | 1173 | handles = kmalloc_array(count_handles, sizeof(*handles), GFP_KERNEL); |
5e60a10e DA |
1174 | if (handles == NULL) |
1175 | return -ENOMEM; | |
1176 | ||
3e6fb72d JE |
1177 | if (copy_from_user(handles, user_handles, |
1178 | sizeof(uint32_t) * count_handles)) { | |
5e60a10e DA |
1179 | ret = -EFAULT; |
1180 | goto err_free_handles; | |
1181 | } | |
1182 | ||
3e6fb72d JE |
1183 | syncobjs = kmalloc_array(count_handles, sizeof(*syncobjs), GFP_KERNEL); |
1184 | if (syncobjs == NULL) { | |
5e60a10e DA |
1185 | ret = -ENOMEM; |
1186 | goto err_free_handles; | |
1187 | } | |
1188 | ||
3e6fb72d | 1189 | for (i = 0; i < count_handles; i++) { |
e7aca503 JE |
1190 | syncobjs[i] = drm_syncobj_find(file_private, handles[i]); |
1191 | if (!syncobjs[i]) { | |
1192 | ret = -ENOENT; | |
3e6fb72d | 1193 | goto err_put_syncobjs; |
e7aca503 | 1194 | } |
5e60a10e DA |
1195 | } |
1196 | ||
3e6fb72d JE |
1197 | kfree(handles); |
1198 | *syncobjs_out = syncobjs; | |
1199 | return 0; | |
5e60a10e | 1200 | |
3e6fb72d | 1201 | err_put_syncobjs: |
e7aca503 JE |
1202 | while (i-- > 0) |
1203 | drm_syncobj_put(syncobjs[i]); | |
1204 | kfree(syncobjs); | |
5e60a10e DA |
1205 | err_free_handles: |
1206 | kfree(handles); | |
1207 | ||
1208 | return ret; | |
1209 | } | |
3e6fb72d JE |
1210 | |
1211 | static void drm_syncobj_array_free(struct drm_syncobj **syncobjs, | |
1212 | uint32_t count) | |
1213 | { | |
1214 | uint32_t i; | |
948de842 | 1215 | |
3e6fb72d JE |
1216 | for (i = 0; i < count; i++) |
1217 | drm_syncobj_put(syncobjs[i]); | |
1218 | kfree(syncobjs); | |
1219 | } | |
1220 | ||
1221 | int | |
1222 | drm_syncobj_wait_ioctl(struct drm_device *dev, void *data, | |
1223 | struct drm_file *file_private) | |
1224 | { | |
1225 | struct drm_syncobj_wait *args = data; | |
1226 | struct drm_syncobj **syncobjs; | |
1227 | int ret = 0; | |
1228 | ||
1229 | if (!drm_core_check_feature(dev, DRIVER_SYNCOBJ)) | |
69fdf420 | 1230 | return -EOPNOTSUPP; |
3e6fb72d JE |
1231 | |
1232 | if (args->flags & ~(DRM_SYNCOBJ_WAIT_FLAGS_WAIT_ALL | | |
1233 | DRM_SYNCOBJ_WAIT_FLAGS_WAIT_FOR_SUBMIT)) | |
1234 | return -EINVAL; | |
1235 | ||
1236 | if (args->count_handles == 0) | |
1237 | return -EINVAL; | |
1238 | ||
1239 | ret = drm_syncobj_array_find(file_private, | |
1240 | u64_to_user_ptr(args->handles), | |
1241 | args->count_handles, | |
1242 | &syncobjs); | |
1243 | if (ret < 0) | |
1244 | return ret; | |
1245 | ||
1246 | ret = drm_syncobj_array_wait(dev, file_private, | |
01d6c357 | 1247 | args, NULL, syncobjs, false); |
3e6fb72d JE |
1248 | |
1249 | drm_syncobj_array_free(syncobjs, args->count_handles); | |
1250 | ||
1251 | return ret; | |
1252 | } | |
aa4035d2 | 1253 | |
01d6c357 CZ |
1254 | int |
1255 | drm_syncobj_timeline_wait_ioctl(struct drm_device *dev, void *data, | |
1256 | struct drm_file *file_private) | |
1257 | { | |
1258 | struct drm_syncobj_timeline_wait *args = data; | |
1259 | struct drm_syncobj **syncobjs; | |
1260 | int ret = 0; | |
1261 | ||
060cebb2 | 1262 | if (!drm_core_check_feature(dev, DRIVER_SYNCOBJ_TIMELINE)) |
5ec77638 | 1263 | return -EOPNOTSUPP; |
01d6c357 CZ |
1264 | |
1265 | if (args->flags & ~(DRM_SYNCOBJ_WAIT_FLAGS_WAIT_ALL | | |
1266 | DRM_SYNCOBJ_WAIT_FLAGS_WAIT_FOR_SUBMIT | | |
1267 | DRM_SYNCOBJ_WAIT_FLAGS_WAIT_AVAILABLE)) | |
1268 | return -EINVAL; | |
1269 | ||
1270 | if (args->count_handles == 0) | |
1271 | return -EINVAL; | |
1272 | ||
1273 | ret = drm_syncobj_array_find(file_private, | |
1274 | u64_to_user_ptr(args->handles), | |
1275 | args->count_handles, | |
1276 | &syncobjs); | |
1277 | if (ret < 0) | |
1278 | return ret; | |
1279 | ||
1280 | ret = drm_syncobj_array_wait(dev, file_private, | |
1281 | NULL, args, syncobjs, true); | |
3e6fb72d JE |
1282 | |
1283 | drm_syncobj_array_free(syncobjs, args->count_handles); | |
1284 | ||
1285 | return ret; | |
1286 | } | |
aa4035d2 | 1287 | |
01d6c357 | 1288 | |
aa4035d2 JE |
1289 | int |
1290 | drm_syncobj_reset_ioctl(struct drm_device *dev, void *data, | |
1291 | struct drm_file *file_private) | |
1292 | { | |
1293 | struct drm_syncobj_array *args = data; | |
1294 | struct drm_syncobj **syncobjs; | |
1295 | uint32_t i; | |
1296 | int ret; | |
1297 | ||
1298 | if (!drm_core_check_feature(dev, DRIVER_SYNCOBJ)) | |
69fdf420 | 1299 | return -EOPNOTSUPP; |
aa4035d2 JE |
1300 | |
1301 | if (args->pad != 0) | |
1302 | return -EINVAL; | |
1303 | ||
1304 | if (args->count_handles == 0) | |
1305 | return -EINVAL; | |
1306 | ||
1307 | ret = drm_syncobj_array_find(file_private, | |
1308 | u64_to_user_ptr(args->handles), | |
1309 | args->count_handles, | |
1310 | &syncobjs); | |
1311 | if (ret < 0) | |
1312 | return ret; | |
1313 | ||
131280a1 | 1314 | for (i = 0; i < args->count_handles; i++) |
0b258ed1 | 1315 | drm_syncobj_replace_fence(syncobjs[i], NULL); |
131280a1 | 1316 | |
aa4035d2 JE |
1317 | drm_syncobj_array_free(syncobjs, args->count_handles); |
1318 | ||
131280a1 | 1319 | return 0; |
aa4035d2 | 1320 | } |
ffa9443f JE |
1321 | |
1322 | int | |
1323 | drm_syncobj_signal_ioctl(struct drm_device *dev, void *data, | |
1324 | struct drm_file *file_private) | |
1325 | { | |
1326 | struct drm_syncobj_array *args = data; | |
1327 | struct drm_syncobj **syncobjs; | |
1328 | uint32_t i; | |
1329 | int ret; | |
1330 | ||
1331 | if (!drm_core_check_feature(dev, DRIVER_SYNCOBJ)) | |
69fdf420 | 1332 | return -EOPNOTSUPP; |
ffa9443f JE |
1333 | |
1334 | if (args->pad != 0) | |
1335 | return -EINVAL; | |
1336 | ||
1337 | if (args->count_handles == 0) | |
1338 | return -EINVAL; | |
1339 | ||
1340 | ret = drm_syncobj_array_find(file_private, | |
1341 | u64_to_user_ptr(args->handles), | |
1342 | args->count_handles, | |
1343 | &syncobjs); | |
1344 | if (ret < 0) | |
1345 | return ret; | |
1346 | ||
fd921693 DS |
1347 | for (i = 0; i < args->count_handles; i++) { |
1348 | ret = drm_syncobj_assign_null_handle(syncobjs[i]); | |
1349 | if (ret < 0) | |
1350 | break; | |
1351 | } | |
ffa9443f JE |
1352 | |
1353 | drm_syncobj_array_free(syncobjs, args->count_handles); | |
1354 | ||
1355 | return ret; | |
1356 | } | |
27b575a9 | 1357 | |
50d1ebef CZ |
1358 | int |
1359 | drm_syncobj_timeline_signal_ioctl(struct drm_device *dev, void *data, | |
1360 | struct drm_file *file_private) | |
1361 | { | |
1362 | struct drm_syncobj_timeline_array *args = data; | |
1363 | struct drm_syncobj **syncobjs; | |
1364 | struct dma_fence_chain **chains; | |
1365 | uint64_t *points; | |
1366 | uint32_t i, j; | |
1367 | int ret; | |
1368 | ||
060cebb2 | 1369 | if (!drm_core_check_feature(dev, DRIVER_SYNCOBJ_TIMELINE)) |
50d1ebef CZ |
1370 | return -EOPNOTSUPP; |
1371 | ||
2093dea3 | 1372 | if (args->flags != 0) |
50d1ebef CZ |
1373 | return -EINVAL; |
1374 | ||
1375 | if (args->count_handles == 0) | |
1376 | return -EINVAL; | |
1377 | ||
1378 | ret = drm_syncobj_array_find(file_private, | |
1379 | u64_to_user_ptr(args->handles), | |
1380 | args->count_handles, | |
1381 | &syncobjs); | |
1382 | if (ret < 0) | |
1383 | return ret; | |
1384 | ||
1385 | points = kmalloc_array(args->count_handles, sizeof(*points), | |
1386 | GFP_KERNEL); | |
1387 | if (!points) { | |
1388 | ret = -ENOMEM; | |
1389 | goto out; | |
1390 | } | |
1391 | if (!u64_to_user_ptr(args->points)) { | |
1392 | memset(points, 0, args->count_handles * sizeof(uint64_t)); | |
1393 | } else if (copy_from_user(points, u64_to_user_ptr(args->points), | |
1394 | sizeof(uint64_t) * args->count_handles)) { | |
1395 | ret = -EFAULT; | |
1396 | goto err_points; | |
1397 | } | |
1398 | ||
1399 | chains = kmalloc_array(args->count_handles, sizeof(void *), GFP_KERNEL); | |
1400 | if (!chains) { | |
1401 | ret = -ENOMEM; | |
1402 | goto err_points; | |
1403 | } | |
1404 | for (i = 0; i < args->count_handles; i++) { | |
1405 | chains[i] = kzalloc(sizeof(struct dma_fence_chain), GFP_KERNEL); | |
1406 | if (!chains[i]) { | |
1407 | for (j = 0; j < i; j++) | |
1408 | kfree(chains[j]); | |
1409 | ret = -ENOMEM; | |
1410 | goto err_chains; | |
1411 | } | |
1412 | } | |
1413 | ||
1414 | for (i = 0; i < args->count_handles; i++) { | |
1415 | struct dma_fence *fence = dma_fence_get_stub(); | |
1416 | ||
1417 | drm_syncobj_add_point(syncobjs[i], chains[i], | |
1418 | fence, points[i]); | |
1419 | dma_fence_put(fence); | |
1420 | } | |
1421 | err_chains: | |
1422 | kfree(chains); | |
1423 | err_points: | |
1424 | kfree(points); | |
1425 | out: | |
1426 | drm_syncobj_array_free(syncobjs, args->count_handles); | |
1427 | ||
1428 | return ret; | |
1429 | } | |
1430 | ||
27b575a9 CZ |
1431 | int drm_syncobj_query_ioctl(struct drm_device *dev, void *data, |
1432 | struct drm_file *file_private) | |
1433 | { | |
1434 | struct drm_syncobj_timeline_array *args = data; | |
1435 | struct drm_syncobj **syncobjs; | |
1436 | uint64_t __user *points = u64_to_user_ptr(args->points); | |
1437 | uint32_t i; | |
1438 | int ret; | |
1439 | ||
060cebb2 LL |
1440 | if (!drm_core_check_feature(dev, DRIVER_SYNCOBJ_TIMELINE)) |
1441 | return -EOPNOTSUPP; | |
27b575a9 | 1442 | |
2093dea3 | 1443 | if (args->flags & ~DRM_SYNCOBJ_QUERY_FLAGS_LAST_SUBMITTED) |
27b575a9 CZ |
1444 | return -EINVAL; |
1445 | ||
1446 | if (args->count_handles == 0) | |
1447 | return -EINVAL; | |
1448 | ||
1449 | ret = drm_syncobj_array_find(file_private, | |
1450 | u64_to_user_ptr(args->handles), | |
1451 | args->count_handles, | |
1452 | &syncobjs); | |
1453 | if (ret < 0) | |
1454 | return ret; | |
1455 | ||
1456 | for (i = 0; i < args->count_handles; i++) { | |
1457 | struct dma_fence_chain *chain; | |
1458 | struct dma_fence *fence; | |
1459 | uint64_t point; | |
1460 | ||
1461 | fence = drm_syncobj_fence_get(syncobjs[i]); | |
1462 | chain = to_dma_fence_chain(fence); | |
1463 | if (chain) { | |
2093dea3 CZ |
1464 | struct dma_fence *iter, *last_signaled = |
1465 | dma_fence_get(fence); | |
1466 | ||
1467 | if (args->flags & | |
1468 | DRM_SYNCOBJ_QUERY_FLAGS_LAST_SUBMITTED) { | |
1469 | point = fence->seqno; | |
1470 | } else { | |
1471 | dma_fence_chain_for_each(iter, fence) { | |
1472 | if (iter->context != fence->context) { | |
1473 | dma_fence_put(iter); | |
1474 | /* It is most likely that timeline has | |
1475 | * unorder points. */ | |
1476 | break; | |
1477 | } | |
1478 | dma_fence_put(last_signaled); | |
1479 | last_signaled = dma_fence_get(iter); | |
b33b556c | 1480 | } |
2093dea3 CZ |
1481 | point = dma_fence_is_signaled(last_signaled) ? |
1482 | last_signaled->seqno : | |
1483 | to_dma_fence_chain(last_signaled)->prev_seqno; | |
27b575a9 | 1484 | } |
27b575a9 CZ |
1485 | dma_fence_put(last_signaled); |
1486 | } else { | |
1487 | point = 0; | |
1488 | } | |
2093dea3 | 1489 | dma_fence_put(fence); |
27b575a9 CZ |
1490 | ret = copy_to_user(&points[i], &point, sizeof(uint64_t)); |
1491 | ret = ret ? -EFAULT : 0; | |
1492 | if (ret) | |
1493 | break; | |
1494 | } | |
1495 | drm_syncobj_array_free(syncobjs, args->count_handles); | |
1496 | ||
1497 | return ret; | |
1498 | } |