Commit | Line | Data |
---|---|---|
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); | |
b19926d4 BN |
407 | if (!ret) { |
408 | /* If the requested seqno is already signaled | |
409 | * drm_syncobj_find_fence may return a NULL | |
410 | * fence. To make sure the recipient gets | |
411 | * signalled, use a new fence instead. | |
412 | */ | |
413 | if (!*fence) | |
414 | *fence = dma_fence_get_stub(); | |
415 | ||
a37eef63 | 416 | goto out; |
b19926d4 | 417 | } |
bc9c80fe CK |
418 | dma_fence_put(*fence); |
419 | } else { | |
131280a1 EA |
420 | ret = -EINVAL; |
421 | } | |
bc9c80fe CK |
422 | |
423 | if (!(flags & DRM_SYNCOBJ_WAIT_FLAGS_WAIT_FOR_SUBMIT)) | |
a37eef63 | 424 | goto out; |
bc9c80fe CK |
425 | |
426 | memset(&wait, 0, sizeof(wait)); | |
427 | wait.task = current; | |
428 | wait.point = point; | |
429 | drm_syncobj_fence_add_wait(syncobj, &wait); | |
430 | ||
431 | do { | |
432 | set_current_state(TASK_INTERRUPTIBLE); | |
433 | if (wait.fence) { | |
434 | ret = 0; | |
435 | break; | |
436 | } | |
437 | if (timeout == 0) { | |
438 | ret = -ETIME; | |
439 | break; | |
440 | } | |
441 | ||
442 | if (signal_pending(current)) { | |
443 | ret = -ERESTARTSYS; | |
444 | break; | |
445 | } | |
446 | ||
447 | timeout = schedule_timeout(timeout); | |
448 | } while (1); | |
449 | ||
450 | __set_current_state(TASK_RUNNING); | |
451 | *fence = wait.fence; | |
452 | ||
453 | if (wait.node.next) | |
454 | drm_syncobj_remove_wait(syncobj, &wait); | |
455 | ||
a37eef63 DV |
456 | out: |
457 | drm_syncobj_put(syncobj); | |
458 | ||
e9083420 DA |
459 | return ret; |
460 | } | |
afaf5923 | 461 | EXPORT_SYMBOL(drm_syncobj_find_fence); |
e9083420 DA |
462 | |
463 | /** | |
464 | * drm_syncobj_free - free a sync object. | |
465 | * @kref: kref to free. | |
466 | * | |
467 | * Only to be called from kref_put in drm_syncobj_put. | |
468 | */ | |
469 | void drm_syncobj_free(struct kref *kref) | |
470 | { | |
471 | struct drm_syncobj *syncobj = container_of(kref, | |
472 | struct drm_syncobj, | |
473 | refcount); | |
0b258ed1 | 474 | drm_syncobj_replace_fence(syncobj, NULL); |
e9083420 DA |
475 | kfree(syncobj); |
476 | } | |
477 | EXPORT_SYMBOL(drm_syncobj_free); | |
478 | ||
1321fd2c MO |
479 | /** |
480 | * drm_syncobj_create - create a new syncobj | |
481 | * @out_syncobj: returned syncobj | |
482 | * @flags: DRM_SYNCOBJ_* flags | |
483 | * @fence: if non-NULL, the syncobj will represent this fence | |
924fe8df DV |
484 | * |
485 | * This is the first function to create a sync object. After creating, drivers | |
486 | * probably want to make it available to userspace, either through | |
487 | * drm_syncobj_get_handle() or drm_syncobj_get_fd(). | |
488 | * | |
489 | * Returns 0 on success or a negative error value on failure. | |
1321fd2c MO |
490 | */ |
491 | int drm_syncobj_create(struct drm_syncobj **out_syncobj, uint32_t flags, | |
492 | struct dma_fence *fence) | |
e9083420 | 493 | { |
fd921693 | 494 | int ret; |
e9083420 DA |
495 | struct drm_syncobj *syncobj; |
496 | ||
497 | syncobj = kzalloc(sizeof(struct drm_syncobj), GFP_KERNEL); | |
498 | if (!syncobj) | |
499 | return -ENOMEM; | |
500 | ||
501 | kref_init(&syncobj->refcount); | |
9c19fb10 | 502 | INIT_LIST_HEAD(&syncobj->cb_list); |
131280a1 | 503 | spin_lock_init(&syncobj->lock); |
e9083420 | 504 | |
fd921693 DS |
505 | if (flags & DRM_SYNCOBJ_CREATE_SIGNALED) { |
506 | ret = drm_syncobj_assign_null_handle(syncobj); | |
507 | if (ret < 0) { | |
508 | drm_syncobj_put(syncobj); | |
509 | return ret; | |
510 | } | |
511 | } | |
1fc08218 | 512 | |
1321fd2c | 513 | if (fence) |
0b258ed1 | 514 | drm_syncobj_replace_fence(syncobj, fence); |
1321fd2c MO |
515 | |
516 | *out_syncobj = syncobj; | |
517 | return 0; | |
518 | } | |
519 | EXPORT_SYMBOL(drm_syncobj_create); | |
520 | ||
521 | /** | |
522 | * drm_syncobj_get_handle - get a handle from a syncobj | |
924fe8df DV |
523 | * @file_private: drm file private pointer |
524 | * @syncobj: Sync object to export | |
525 | * @handle: out parameter with the new handle | |
526 | * | |
527 | * Exports a sync object created with drm_syncobj_create() as a handle on | |
528 | * @file_private to userspace. | |
529 | * | |
530 | * Returns 0 on success or a negative error value on failure. | |
1321fd2c MO |
531 | */ |
532 | int drm_syncobj_get_handle(struct drm_file *file_private, | |
533 | struct drm_syncobj *syncobj, u32 *handle) | |
534 | { | |
535 | int ret; | |
536 | ||
537 | /* take a reference to put in the idr */ | |
538 | drm_syncobj_get(syncobj); | |
539 | ||
e9083420 DA |
540 | idr_preload(GFP_KERNEL); |
541 | spin_lock(&file_private->syncobj_table_lock); | |
542 | ret = idr_alloc(&file_private->syncobj_idr, syncobj, 1, 0, GFP_NOWAIT); | |
543 | spin_unlock(&file_private->syncobj_table_lock); | |
544 | ||
545 | idr_preload_end(); | |
546 | ||
547 | if (ret < 0) { | |
548 | drm_syncobj_put(syncobj); | |
549 | return ret; | |
550 | } | |
551 | ||
552 | *handle = ret; | |
553 | return 0; | |
554 | } | |
1321fd2c MO |
555 | EXPORT_SYMBOL(drm_syncobj_get_handle); |
556 | ||
557 | static int drm_syncobj_create_as_handle(struct drm_file *file_private, | |
558 | u32 *handle, uint32_t flags) | |
559 | { | |
560 | int ret; | |
561 | struct drm_syncobj *syncobj; | |
562 | ||
563 | ret = drm_syncobj_create(&syncobj, flags, NULL); | |
564 | if (ret) | |
565 | return ret; | |
566 | ||
567 | ret = drm_syncobj_get_handle(file_private, syncobj, handle); | |
568 | drm_syncobj_put(syncobj); | |
569 | return ret; | |
570 | } | |
e9083420 DA |
571 | |
572 | static int drm_syncobj_destroy(struct drm_file *file_private, | |
573 | u32 handle) | |
574 | { | |
575 | struct drm_syncobj *syncobj; | |
576 | ||
577 | spin_lock(&file_private->syncobj_table_lock); | |
578 | syncobj = idr_remove(&file_private->syncobj_idr, handle); | |
579 | spin_unlock(&file_private->syncobj_table_lock); | |
580 | ||
581 | if (!syncobj) | |
582 | return -EINVAL; | |
583 | ||
584 | drm_syncobj_put(syncobj); | |
585 | return 0; | |
586 | } | |
587 | ||
588 | static int drm_syncobj_file_release(struct inode *inode, struct file *file) | |
589 | { | |
590 | struct drm_syncobj *syncobj = file->private_data; | |
591 | ||
592 | drm_syncobj_put(syncobj); | |
593 | return 0; | |
594 | } | |
595 | ||
596 | static const struct file_operations drm_syncobj_file_fops = { | |
597 | .release = drm_syncobj_file_release, | |
598 | }; | |
599 | ||
924fe8df DV |
600 | /** |
601 | * drm_syncobj_get_fd - get a file descriptor from a syncobj | |
602 | * @syncobj: Sync object to export | |
603 | * @p_fd: out parameter with the new file descriptor | |
604 | * | |
605 | * Exports a sync object created with drm_syncobj_create() as a file descriptor. | |
606 | * | |
607 | * Returns 0 on success or a negative error value on failure. | |
608 | */ | |
684fd0af | 609 | int drm_syncobj_get_fd(struct drm_syncobj *syncobj, int *p_fd) |
e9083420 | 610 | { |
e7cdf5c8 | 611 | struct file *file; |
e9083420 DA |
612 | int fd; |
613 | ||
e9083420 | 614 | fd = get_unused_fd_flags(O_CLOEXEC); |
684fd0af | 615 | if (fd < 0) |
e9083420 | 616 | return fd; |
e9083420 | 617 | |
e7cdf5c8 CW |
618 | file = anon_inode_getfile("syncobj_file", |
619 | &drm_syncobj_file_fops, | |
620 | syncobj, 0); | |
621 | if (IS_ERR(file)) { | |
622 | put_unused_fd(fd); | |
623 | return PTR_ERR(file); | |
e9083420 | 624 | } |
e7cdf5c8 CW |
625 | |
626 | drm_syncobj_get(syncobj); | |
627 | fd_install(fd, file); | |
628 | ||
e9083420 DA |
629 | *p_fd = fd; |
630 | return 0; | |
684fd0af MO |
631 | } |
632 | EXPORT_SYMBOL(drm_syncobj_get_fd); | |
633 | ||
634 | static int drm_syncobj_handle_to_fd(struct drm_file *file_private, | |
635 | u32 handle, int *p_fd) | |
636 | { | |
637 | struct drm_syncobj *syncobj = drm_syncobj_find(file_private, handle); | |
638 | int ret; | |
639 | ||
640 | if (!syncobj) | |
641 | return -EINVAL; | |
642 | ||
643 | ret = drm_syncobj_get_fd(syncobj, p_fd); | |
e9083420 DA |
644 | drm_syncobj_put(syncobj); |
645 | return ret; | |
646 | } | |
647 | ||
e9083420 DA |
648 | static int drm_syncobj_fd_to_handle(struct drm_file *file_private, |
649 | int fd, u32 *handle) | |
650 | { | |
e7cdf5c8 | 651 | struct drm_syncobj *syncobj; |
fb386243 | 652 | struct fd f = fdget(fd); |
e9083420 DA |
653 | int ret; |
654 | ||
fb386243 | 655 | if (!f.file) |
e9083420 DA |
656 | return -EINVAL; |
657 | ||
fb386243 AV |
658 | if (f.file->f_op != &drm_syncobj_file_fops) { |
659 | fdput(f); | |
e7cdf5c8 CW |
660 | return -EINVAL; |
661 | } | |
662 | ||
e9083420 | 663 | /* take a reference to put in the idr */ |
fb386243 | 664 | syncobj = f.file->private_data; |
e9083420 DA |
665 | drm_syncobj_get(syncobj); |
666 | ||
667 | idr_preload(GFP_KERNEL); | |
668 | spin_lock(&file_private->syncobj_table_lock); | |
669 | ret = idr_alloc(&file_private->syncobj_idr, syncobj, 1, 0, GFP_NOWAIT); | |
670 | spin_unlock(&file_private->syncobj_table_lock); | |
671 | idr_preload_end(); | |
672 | ||
e7cdf5c8 CW |
673 | if (ret > 0) { |
674 | *handle = ret; | |
675 | ret = 0; | |
676 | } else | |
677 | drm_syncobj_put(syncobj); | |
678 | ||
fb386243 | 679 | fdput(f); |
e7cdf5c8 | 680 | return ret; |
e9083420 DA |
681 | } |
682 | ||
a32c94af VS |
683 | static int drm_syncobj_import_sync_file_fence(struct drm_file *file_private, |
684 | int fd, int handle) | |
3ee45a3b DA |
685 | { |
686 | struct dma_fence *fence = sync_file_get_fence(fd); | |
687 | struct drm_syncobj *syncobj; | |
688 | ||
689 | if (!fence) | |
690 | return -EINVAL; | |
691 | ||
692 | syncobj = drm_syncobj_find(file_private, handle); | |
693 | if (!syncobj) { | |
694 | dma_fence_put(fence); | |
695 | return -ENOENT; | |
696 | } | |
697 | ||
0b258ed1 | 698 | drm_syncobj_replace_fence(syncobj, fence); |
3ee45a3b DA |
699 | dma_fence_put(fence); |
700 | drm_syncobj_put(syncobj); | |
701 | return 0; | |
702 | } | |
703 | ||
a32c94af VS |
704 | static int drm_syncobj_export_sync_file(struct drm_file *file_private, |
705 | int handle, int *p_fd) | |
3ee45a3b DA |
706 | { |
707 | int ret; | |
708 | struct dma_fence *fence; | |
709 | struct sync_file *sync_file; | |
710 | int fd = get_unused_fd_flags(O_CLOEXEC); | |
711 | ||
712 | if (fd < 0) | |
713 | return fd; | |
714 | ||
649fdce2 | 715 | ret = drm_syncobj_find_fence(file_private, handle, 0, 0, &fence); |
3ee45a3b DA |
716 | if (ret) |
717 | goto err_put_fd; | |
718 | ||
719 | sync_file = sync_file_create(fence); | |
720 | ||
721 | dma_fence_put(fence); | |
722 | ||
723 | if (!sync_file) { | |
724 | ret = -EINVAL; | |
725 | goto err_put_fd; | |
726 | } | |
727 | ||
728 | fd_install(fd, sync_file->file); | |
729 | ||
730 | *p_fd = fd; | |
731 | return 0; | |
732 | err_put_fd: | |
733 | put_unused_fd(fd); | |
734 | return ret; | |
735 | } | |
e9083420 | 736 | /** |
0ae865ef | 737 | * drm_syncobj_open - initializes syncobj file-private structures at devnode open time |
e9083420 DA |
738 | * @file_private: drm file-private structure to set up |
739 | * | |
740 | * Called at device open time, sets up the structure for handling refcounting | |
741 | * of sync objects. | |
742 | */ | |
743 | void | |
744 | drm_syncobj_open(struct drm_file *file_private) | |
745 | { | |
e86584c5 | 746 | idr_init_base(&file_private->syncobj_idr, 1); |
e9083420 DA |
747 | spin_lock_init(&file_private->syncobj_table_lock); |
748 | } | |
749 | ||
750 | static int | |
751 | drm_syncobj_release_handle(int id, void *ptr, void *data) | |
752 | { | |
753 | struct drm_syncobj *syncobj = ptr; | |
754 | ||
755 | drm_syncobj_put(syncobj); | |
756 | return 0; | |
757 | } | |
758 | ||
759 | /** | |
760 | * drm_syncobj_release - release file-private sync object resources | |
e9083420 DA |
761 | * @file_private: drm file-private structure to clean up |
762 | * | |
763 | * Called at close time when the filp is going away. | |
764 | * | |
765 | * Releases any remaining references on objects by this filp. | |
766 | */ | |
767 | void | |
768 | drm_syncobj_release(struct drm_file *file_private) | |
769 | { | |
770 | idr_for_each(&file_private->syncobj_idr, | |
771 | &drm_syncobj_release_handle, file_private); | |
772 | idr_destroy(&file_private->syncobj_idr); | |
773 | } | |
774 | ||
775 | int | |
776 | drm_syncobj_create_ioctl(struct drm_device *dev, void *data, | |
777 | struct drm_file *file_private) | |
778 | { | |
779 | struct drm_syncobj_create *args = data; | |
780 | ||
781 | if (!drm_core_check_feature(dev, DRIVER_SYNCOBJ)) | |
69fdf420 | 782 | return -EOPNOTSUPP; |
e9083420 DA |
783 | |
784 | /* no valid flags yet */ | |
131280a1 | 785 | if (args->flags & ~DRM_SYNCOBJ_CREATE_SIGNALED) |
e9083420 DA |
786 | return -EINVAL; |
787 | ||
1321fd2c MO |
788 | return drm_syncobj_create_as_handle(file_private, |
789 | &args->handle, args->flags); | |
e9083420 DA |
790 | } |
791 | ||
792 | int | |
793 | drm_syncobj_destroy_ioctl(struct drm_device *dev, void *data, | |
794 | struct drm_file *file_private) | |
795 | { | |
796 | struct drm_syncobj_destroy *args = data; | |
797 | ||
798 | if (!drm_core_check_feature(dev, DRIVER_SYNCOBJ)) | |
69fdf420 | 799 | return -EOPNOTSUPP; |
e9083420 DA |
800 | |
801 | /* make sure padding is empty */ | |
802 | if (args->pad) | |
803 | return -EINVAL; | |
804 | return drm_syncobj_destroy(file_private, args->handle); | |
805 | } | |
806 | ||
807 | int | |
808 | drm_syncobj_handle_to_fd_ioctl(struct drm_device *dev, void *data, | |
809 | struct drm_file *file_private) | |
810 | { | |
811 | struct drm_syncobj_handle *args = data; | |
812 | ||
813 | if (!drm_core_check_feature(dev, DRIVER_SYNCOBJ)) | |
69fdf420 | 814 | return -EOPNOTSUPP; |
e9083420 | 815 | |
3ee45a3b | 816 | if (args->pad) |
e9083420 DA |
817 | return -EINVAL; |
818 | ||
3ee45a3b DA |
819 | if (args->flags != 0 && |
820 | args->flags != DRM_SYNCOBJ_HANDLE_TO_FD_FLAGS_EXPORT_SYNC_FILE) | |
821 | return -EINVAL; | |
822 | ||
823 | if (args->flags & DRM_SYNCOBJ_HANDLE_TO_FD_FLAGS_EXPORT_SYNC_FILE) | |
824 | return drm_syncobj_export_sync_file(file_private, args->handle, | |
825 | &args->fd); | |
826 | ||
e9083420 DA |
827 | return drm_syncobj_handle_to_fd(file_private, args->handle, |
828 | &args->fd); | |
829 | } | |
830 | ||
831 | int | |
832 | drm_syncobj_fd_to_handle_ioctl(struct drm_device *dev, void *data, | |
833 | struct drm_file *file_private) | |
834 | { | |
835 | struct drm_syncobj_handle *args = data; | |
836 | ||
837 | if (!drm_core_check_feature(dev, DRIVER_SYNCOBJ)) | |
69fdf420 | 838 | return -EOPNOTSUPP; |
e9083420 | 839 | |
3ee45a3b DA |
840 | if (args->pad) |
841 | return -EINVAL; | |
842 | ||
843 | if (args->flags != 0 && | |
844 | args->flags != DRM_SYNCOBJ_FD_TO_HANDLE_FLAGS_IMPORT_SYNC_FILE) | |
e9083420 DA |
845 | return -EINVAL; |
846 | ||
3ee45a3b DA |
847 | if (args->flags & DRM_SYNCOBJ_FD_TO_HANDLE_FLAGS_IMPORT_SYNC_FILE) |
848 | return drm_syncobj_import_sync_file_fence(file_private, | |
849 | args->fd, | |
850 | args->handle); | |
851 | ||
e9083420 DA |
852 | return drm_syncobj_fd_to_handle(file_private, args->fd, |
853 | &args->handle); | |
854 | } | |
5e60a10e | 855 | |
ea569910 CZ |
856 | static int drm_syncobj_transfer_to_timeline(struct drm_file *file_private, |
857 | struct drm_syncobj_transfer *args) | |
858 | { | |
859 | struct drm_syncobj *timeline_syncobj = NULL; | |
860 | struct dma_fence *fence; | |
861 | struct dma_fence_chain *chain; | |
862 | int ret; | |
863 | ||
864 | timeline_syncobj = drm_syncobj_find(file_private, args->dst_handle); | |
865 | if (!timeline_syncobj) { | |
866 | return -ENOENT; | |
867 | } | |
868 | ret = drm_syncobj_find_fence(file_private, args->src_handle, | |
869 | args->src_point, args->flags, | |
870 | &fence); | |
871 | if (ret) | |
872 | goto err; | |
440d0f12 | 873 | chain = dma_fence_chain_alloc(); |
ea569910 CZ |
874 | if (!chain) { |
875 | ret = -ENOMEM; | |
876 | goto err1; | |
877 | } | |
878 | drm_syncobj_add_point(timeline_syncobj, chain, fence, args->dst_point); | |
879 | err1: | |
880 | dma_fence_put(fence); | |
881 | err: | |
882 | drm_syncobj_put(timeline_syncobj); | |
883 | ||
884 | return ret; | |
885 | } | |
886 | ||
887 | static int | |
888 | drm_syncobj_transfer_to_binary(struct drm_file *file_private, | |
889 | struct drm_syncobj_transfer *args) | |
890 | { | |
891 | struct drm_syncobj *binary_syncobj = NULL; | |
892 | struct dma_fence *fence; | |
893 | int ret; | |
894 | ||
895 | binary_syncobj = drm_syncobj_find(file_private, args->dst_handle); | |
896 | if (!binary_syncobj) | |
897 | return -ENOENT; | |
898 | ret = drm_syncobj_find_fence(file_private, args->src_handle, | |
899 | args->src_point, args->flags, &fence); | |
900 | if (ret) | |
901 | goto err; | |
902 | drm_syncobj_replace_fence(binary_syncobj, fence); | |
903 | dma_fence_put(fence); | |
904 | err: | |
905 | drm_syncobj_put(binary_syncobj); | |
906 | ||
907 | return ret; | |
908 | } | |
909 | int | |
910 | drm_syncobj_transfer_ioctl(struct drm_device *dev, void *data, | |
911 | struct drm_file *file_private) | |
912 | { | |
913 | struct drm_syncobj_transfer *args = data; | |
914 | int ret; | |
915 | ||
060cebb2 | 916 | if (!drm_core_check_feature(dev, DRIVER_SYNCOBJ_TIMELINE)) |
5ec77638 | 917 | return -EOPNOTSUPP; |
ea569910 CZ |
918 | |
919 | if (args->pad) | |
920 | return -EINVAL; | |
921 | ||
922 | if (args->dst_point) | |
923 | ret = drm_syncobj_transfer_to_timeline(file_private, args); | |
924 | else | |
925 | ret = drm_syncobj_transfer_to_binary(file_private, args); | |
926 | ||
927 | return ret; | |
928 | } | |
929 | ||
e7aca503 JE |
930 | static void syncobj_wait_fence_func(struct dma_fence *fence, |
931 | struct dma_fence_cb *cb) | |
932 | { | |
933 | struct syncobj_wait_entry *wait = | |
934 | container_of(cb, struct syncobj_wait_entry, fence_cb); | |
935 | ||
936 | wake_up_process(wait->task); | |
937 | } | |
938 | ||
939 | static void syncobj_wait_syncobj_func(struct drm_syncobj *syncobj, | |
61a98b1b | 940 | struct syncobj_wait_entry *wait) |
e7aca503 | 941 | { |
01d6c357 CZ |
942 | struct dma_fence *fence; |
943 | ||
131280a1 | 944 | /* This happens inside the syncobj lock */ |
01d6c357 CZ |
945 | fence = rcu_dereference_protected(syncobj->fence, |
946 | lockdep_is_held(&syncobj->lock)); | |
947 | dma_fence_get(fence); | |
948 | if (!fence || dma_fence_chain_find_seqno(&fence, wait->point)) { | |
949 | dma_fence_put(fence); | |
950 | return; | |
951 | } else if (!fence) { | |
952 | wait->fence = dma_fence_get_stub(); | |
953 | } else { | |
954 | wait->fence = fence; | |
955 | } | |
956 | ||
e7aca503 | 957 | wake_up_process(wait->task); |
01d6c357 | 958 | list_del_init(&wait->node); |
e7aca503 JE |
959 | } |
960 | ||
961 | static signed long drm_syncobj_array_wait_timeout(struct drm_syncobj **syncobjs, | |
01d6c357 | 962 | void __user *user_points, |
e7aca503 JE |
963 | uint32_t count, |
964 | uint32_t flags, | |
965 | signed long timeout, | |
966 | uint32_t *idx) | |
967 | { | |
968 | struct syncobj_wait_entry *entries; | |
969 | struct dma_fence *fence; | |
01d6c357 | 970 | uint64_t *points; |
e7aca503 JE |
971 | uint32_t signaled_count, i; |
972 | ||
7621350c CK |
973 | if (flags & DRM_SYNCOBJ_WAIT_FLAGS_WAIT_FOR_SUBMIT) |
974 | lockdep_assert_none_held_once(); | |
975 | ||
01d6c357 CZ |
976 | points = kmalloc_array(count, sizeof(*points), GFP_KERNEL); |
977 | if (points == NULL) | |
e7aca503 JE |
978 | return -ENOMEM; |
979 | ||
01d6c357 CZ |
980 | if (!user_points) { |
981 | memset(points, 0, count * sizeof(uint64_t)); | |
982 | ||
983 | } else if (copy_from_user(points, user_points, | |
984 | sizeof(uint64_t) * count)) { | |
985 | timeout = -EFAULT; | |
986 | goto err_free_points; | |
987 | } | |
988 | ||
989 | entries = kcalloc(count, sizeof(*entries), GFP_KERNEL); | |
990 | if (!entries) { | |
991 | timeout = -ENOMEM; | |
992 | goto err_free_points; | |
993 | } | |
e7aca503 JE |
994 | /* Walk the list of sync objects and initialize entries. We do |
995 | * this up-front so that we can properly return -EINVAL if there is | |
996 | * a syncobj with a missing fence and then never have the chance of | |
997 | * returning -EINVAL again. | |
998 | */ | |
999 | signaled_count = 0; | |
1000 | for (i = 0; i < count; ++i) { | |
01d6c357 CZ |
1001 | struct dma_fence *fence; |
1002 | ||
e7aca503 | 1003 | entries[i].task = current; |
01d6c357 CZ |
1004 | entries[i].point = points[i]; |
1005 | fence = drm_syncobj_fence_get(syncobjs[i]); | |
1006 | if (!fence || dma_fence_chain_find_seqno(&fence, points[i])) { | |
1007 | dma_fence_put(fence); | |
e7aca503 JE |
1008 | if (flags & DRM_SYNCOBJ_WAIT_FLAGS_WAIT_FOR_SUBMIT) { |
1009 | continue; | |
1010 | } else { | |
12fec62a | 1011 | timeout = -EINVAL; |
e7aca503 JE |
1012 | goto cleanup_entries; |
1013 | } | |
1014 | } | |
1015 | ||
01d6c357 CZ |
1016 | if (fence) |
1017 | entries[i].fence = fence; | |
1018 | else | |
1019 | entries[i].fence = dma_fence_get_stub(); | |
1020 | ||
1021 | if ((flags & DRM_SYNCOBJ_WAIT_FLAGS_WAIT_AVAILABLE) || | |
1022 | dma_fence_is_signaled(entries[i].fence)) { | |
e7aca503 JE |
1023 | if (signaled_count == 0 && idx) |
1024 | *idx = i; | |
1025 | signaled_count++; | |
1026 | } | |
1027 | } | |
1028 | ||
e7aca503 JE |
1029 | if (signaled_count == count || |
1030 | (signaled_count > 0 && | |
1031 | !(flags & DRM_SYNCOBJ_WAIT_FLAGS_WAIT_ALL))) | |
1032 | goto cleanup_entries; | |
1033 | ||
1034 | /* There's a very annoying laxness in the dma_fence API here, in | |
1035 | * that backends are not required to automatically report when a | |
1036 | * fence is signaled prior to fence->ops->enable_signaling() being | |
1037 | * called. So here if we fail to match signaled_count, we need to | |
1038 | * fallthough and try a 0 timeout wait! | |
1039 | */ | |
1040 | ||
1041 | if (flags & DRM_SYNCOBJ_WAIT_FLAGS_WAIT_FOR_SUBMIT) { | |
61a98b1b CK |
1042 | for (i = 0; i < count; ++i) |
1043 | drm_syncobj_fence_add_wait(syncobjs[i], &entries[i]); | |
e7aca503 JE |
1044 | } |
1045 | ||
1046 | do { | |
1047 | set_current_state(TASK_INTERRUPTIBLE); | |
1048 | ||
1049 | signaled_count = 0; | |
1050 | for (i = 0; i < count; ++i) { | |
1051 | fence = entries[i].fence; | |
1052 | if (!fence) | |
1053 | continue; | |
1054 | ||
01d6c357 CZ |
1055 | if ((flags & DRM_SYNCOBJ_WAIT_FLAGS_WAIT_AVAILABLE) || |
1056 | dma_fence_is_signaled(fence) || | |
e7aca503 JE |
1057 | (!entries[i].fence_cb.func && |
1058 | dma_fence_add_callback(fence, | |
1059 | &entries[i].fence_cb, | |
1060 | syncobj_wait_fence_func))) { | |
1061 | /* The fence has been signaled */ | |
1062 | if (flags & DRM_SYNCOBJ_WAIT_FLAGS_WAIT_ALL) { | |
1063 | signaled_count++; | |
1064 | } else { | |
1065 | if (idx) | |
1066 | *idx = i; | |
1067 | goto done_waiting; | |
1068 | } | |
1069 | } | |
1070 | } | |
1071 | ||
1072 | if (signaled_count == count) | |
1073 | goto done_waiting; | |
1074 | ||
1075 | if (timeout == 0) { | |
12fec62a | 1076 | timeout = -ETIME; |
e7aca503 JE |
1077 | goto done_waiting; |
1078 | } | |
1079 | ||
12fec62a CW |
1080 | if (signal_pending(current)) { |
1081 | timeout = -ERESTARTSYS; | |
1082 | goto done_waiting; | |
1083 | } | |
e7aca503 | 1084 | |
12fec62a CW |
1085 | timeout = schedule_timeout(timeout); |
1086 | } while (1); | |
e7aca503 JE |
1087 | |
1088 | done_waiting: | |
1089 | __set_current_state(TASK_RUNNING); | |
1090 | ||
1091 | cleanup_entries: | |
1092 | for (i = 0; i < count; ++i) { | |
61a98b1b | 1093 | drm_syncobj_remove_wait(syncobjs[i], &entries[i]); |
e7aca503 JE |
1094 | if (entries[i].fence_cb.func) |
1095 | dma_fence_remove_callback(entries[i].fence, | |
1096 | &entries[i].fence_cb); | |
1097 | dma_fence_put(entries[i].fence); | |
1098 | } | |
1099 | kfree(entries); | |
1100 | ||
01d6c357 CZ |
1101 | err_free_points: |
1102 | kfree(points); | |
1103 | ||
12fec62a | 1104 | return timeout; |
e7aca503 JE |
1105 | } |
1106 | ||
5e60a10e DA |
1107 | /** |
1108 | * drm_timeout_abs_to_jiffies - calculate jiffies timeout from absolute value | |
1109 | * | |
1110 | * @timeout_nsec: timeout nsec component in ns, 0 for poll | |
1111 | * | |
1112 | * Calculate the timeout in jiffies from an absolute time in sec/nsec. | |
1113 | */ | |
877b3729 | 1114 | signed long drm_timeout_abs_to_jiffies(int64_t timeout_nsec) |
5e60a10e DA |
1115 | { |
1116 | ktime_t abs_timeout, now; | |
1117 | u64 timeout_ns, timeout_jiffies64; | |
1118 | ||
1119 | /* make 0 timeout means poll - absolute 0 doesn't seem valid */ | |
1120 | if (timeout_nsec == 0) | |
1121 | return 0; | |
1122 | ||
1123 | abs_timeout = ns_to_ktime(timeout_nsec); | |
1124 | now = ktime_get(); | |
1125 | ||
1126 | if (!ktime_after(abs_timeout, now)) | |
1127 | return 0; | |
1128 | ||
1129 | timeout_ns = ktime_to_ns(ktime_sub(abs_timeout, now)); | |
1130 | ||
1131 | timeout_jiffies64 = nsecs_to_jiffies64(timeout_ns); | |
1132 | /* clamp timeout to avoid infinite timeout */ | |
1133 | if (timeout_jiffies64 >= MAX_SCHEDULE_TIMEOUT - 1) | |
1134 | return MAX_SCHEDULE_TIMEOUT - 1; | |
1135 | ||
1136 | return timeout_jiffies64 + 1; | |
1137 | } | |
877b3729 | 1138 | EXPORT_SYMBOL(drm_timeout_abs_to_jiffies); |
5e60a10e | 1139 | |
e7aca503 JE |
1140 | static int drm_syncobj_array_wait(struct drm_device *dev, |
1141 | struct drm_file *file_private, | |
1142 | struct drm_syncobj_wait *wait, | |
01d6c357 CZ |
1143 | struct drm_syncobj_timeline_wait *timeline_wait, |
1144 | struct drm_syncobj **syncobjs, bool timeline) | |
5e60a10e | 1145 | { |
01d6c357 | 1146 | signed long timeout = 0; |
5e60a10e DA |
1147 | uint32_t first = ~0; |
1148 | ||
01d6c357 CZ |
1149 | if (!timeline) { |
1150 | timeout = drm_timeout_abs_to_jiffies(wait->timeout_nsec); | |
1151 | timeout = drm_syncobj_array_wait_timeout(syncobjs, | |
1152 | NULL, | |
1153 | wait->count_handles, | |
1154 | wait->flags, | |
1155 | timeout, &first); | |
1156 | if (timeout < 0) | |
1157 | return timeout; | |
1158 | wait->first_signaled = first; | |
1159 | } else { | |
1160 | timeout = drm_timeout_abs_to_jiffies(timeline_wait->timeout_nsec); | |
1161 | timeout = drm_syncobj_array_wait_timeout(syncobjs, | |
1162 | u64_to_user_ptr(timeline_wait->points), | |
1163 | timeline_wait->count_handles, | |
1164 | timeline_wait->flags, | |
1165 | timeout, &first); | |
1166 | if (timeout < 0) | |
1167 | return timeout; | |
1168 | timeline_wait->first_signaled = first; | |
1169 | } | |
5e60a10e DA |
1170 | return 0; |
1171 | } | |
1172 | ||
3e6fb72d | 1173 | static int drm_syncobj_array_find(struct drm_file *file_private, |
9e554462 VS |
1174 | void __user *user_handles, |
1175 | uint32_t count_handles, | |
3e6fb72d | 1176 | struct drm_syncobj ***syncobjs_out) |
5e60a10e | 1177 | { |
3e6fb72d | 1178 | uint32_t i, *handles; |
e7aca503 | 1179 | struct drm_syncobj **syncobjs; |
3e6fb72d | 1180 | int ret; |
5e60a10e | 1181 | |
3e6fb72d | 1182 | handles = kmalloc_array(count_handles, sizeof(*handles), GFP_KERNEL); |
5e60a10e DA |
1183 | if (handles == NULL) |
1184 | return -ENOMEM; | |
1185 | ||
3e6fb72d JE |
1186 | if (copy_from_user(handles, user_handles, |
1187 | sizeof(uint32_t) * count_handles)) { | |
5e60a10e DA |
1188 | ret = -EFAULT; |
1189 | goto err_free_handles; | |
1190 | } | |
1191 | ||
3e6fb72d JE |
1192 | syncobjs = kmalloc_array(count_handles, sizeof(*syncobjs), GFP_KERNEL); |
1193 | if (syncobjs == NULL) { | |
5e60a10e DA |
1194 | ret = -ENOMEM; |
1195 | goto err_free_handles; | |
1196 | } | |
1197 | ||
3e6fb72d | 1198 | for (i = 0; i < count_handles; i++) { |
e7aca503 JE |
1199 | syncobjs[i] = drm_syncobj_find(file_private, handles[i]); |
1200 | if (!syncobjs[i]) { | |
1201 | ret = -ENOENT; | |
3e6fb72d | 1202 | goto err_put_syncobjs; |
e7aca503 | 1203 | } |
5e60a10e DA |
1204 | } |
1205 | ||
3e6fb72d JE |
1206 | kfree(handles); |
1207 | *syncobjs_out = syncobjs; | |
1208 | return 0; | |
5e60a10e | 1209 | |
3e6fb72d | 1210 | err_put_syncobjs: |
e7aca503 JE |
1211 | while (i-- > 0) |
1212 | drm_syncobj_put(syncobjs[i]); | |
1213 | kfree(syncobjs); | |
5e60a10e DA |
1214 | err_free_handles: |
1215 | kfree(handles); | |
1216 | ||
1217 | return ret; | |
1218 | } | |
3e6fb72d JE |
1219 | |
1220 | static void drm_syncobj_array_free(struct drm_syncobj **syncobjs, | |
1221 | uint32_t count) | |
1222 | { | |
1223 | uint32_t i; | |
948de842 | 1224 | |
3e6fb72d JE |
1225 | for (i = 0; i < count; i++) |
1226 | drm_syncobj_put(syncobjs[i]); | |
1227 | kfree(syncobjs); | |
1228 | } | |
1229 | ||
1230 | int | |
1231 | drm_syncobj_wait_ioctl(struct drm_device *dev, void *data, | |
1232 | struct drm_file *file_private) | |
1233 | { | |
1234 | struct drm_syncobj_wait *args = data; | |
1235 | struct drm_syncobj **syncobjs; | |
1236 | int ret = 0; | |
1237 | ||
1238 | if (!drm_core_check_feature(dev, DRIVER_SYNCOBJ)) | |
69fdf420 | 1239 | return -EOPNOTSUPP; |
3e6fb72d JE |
1240 | |
1241 | if (args->flags & ~(DRM_SYNCOBJ_WAIT_FLAGS_WAIT_ALL | | |
1242 | DRM_SYNCOBJ_WAIT_FLAGS_WAIT_FOR_SUBMIT)) | |
1243 | return -EINVAL; | |
1244 | ||
1245 | if (args->count_handles == 0) | |
1246 | return -EINVAL; | |
1247 | ||
1248 | ret = drm_syncobj_array_find(file_private, | |
1249 | u64_to_user_ptr(args->handles), | |
1250 | args->count_handles, | |
1251 | &syncobjs); | |
1252 | if (ret < 0) | |
1253 | return ret; | |
1254 | ||
1255 | ret = drm_syncobj_array_wait(dev, file_private, | |
01d6c357 | 1256 | args, NULL, syncobjs, false); |
3e6fb72d JE |
1257 | |
1258 | drm_syncobj_array_free(syncobjs, args->count_handles); | |
1259 | ||
1260 | return ret; | |
1261 | } | |
aa4035d2 | 1262 | |
01d6c357 CZ |
1263 | int |
1264 | drm_syncobj_timeline_wait_ioctl(struct drm_device *dev, void *data, | |
1265 | struct drm_file *file_private) | |
1266 | { | |
1267 | struct drm_syncobj_timeline_wait *args = data; | |
1268 | struct drm_syncobj **syncobjs; | |
1269 | int ret = 0; | |
1270 | ||
060cebb2 | 1271 | if (!drm_core_check_feature(dev, DRIVER_SYNCOBJ_TIMELINE)) |
5ec77638 | 1272 | return -EOPNOTSUPP; |
01d6c357 CZ |
1273 | |
1274 | if (args->flags & ~(DRM_SYNCOBJ_WAIT_FLAGS_WAIT_ALL | | |
1275 | DRM_SYNCOBJ_WAIT_FLAGS_WAIT_FOR_SUBMIT | | |
1276 | DRM_SYNCOBJ_WAIT_FLAGS_WAIT_AVAILABLE)) | |
1277 | return -EINVAL; | |
1278 | ||
1279 | if (args->count_handles == 0) | |
1280 | return -EINVAL; | |
1281 | ||
1282 | ret = drm_syncobj_array_find(file_private, | |
1283 | u64_to_user_ptr(args->handles), | |
1284 | args->count_handles, | |
1285 | &syncobjs); | |
1286 | if (ret < 0) | |
1287 | return ret; | |
1288 | ||
1289 | ret = drm_syncobj_array_wait(dev, file_private, | |
1290 | NULL, args, syncobjs, true); | |
3e6fb72d JE |
1291 | |
1292 | drm_syncobj_array_free(syncobjs, args->count_handles); | |
1293 | ||
1294 | return ret; | |
1295 | } | |
aa4035d2 | 1296 | |
01d6c357 | 1297 | |
aa4035d2 JE |
1298 | int |
1299 | drm_syncobj_reset_ioctl(struct drm_device *dev, void *data, | |
1300 | struct drm_file *file_private) | |
1301 | { | |
1302 | struct drm_syncobj_array *args = data; | |
1303 | struct drm_syncobj **syncobjs; | |
1304 | uint32_t i; | |
1305 | int ret; | |
1306 | ||
1307 | if (!drm_core_check_feature(dev, DRIVER_SYNCOBJ)) | |
69fdf420 | 1308 | return -EOPNOTSUPP; |
aa4035d2 JE |
1309 | |
1310 | if (args->pad != 0) | |
1311 | return -EINVAL; | |
1312 | ||
1313 | if (args->count_handles == 0) | |
1314 | return -EINVAL; | |
1315 | ||
1316 | ret = drm_syncobj_array_find(file_private, | |
1317 | u64_to_user_ptr(args->handles), | |
1318 | args->count_handles, | |
1319 | &syncobjs); | |
1320 | if (ret < 0) | |
1321 | return ret; | |
1322 | ||
131280a1 | 1323 | for (i = 0; i < args->count_handles; i++) |
0b258ed1 | 1324 | drm_syncobj_replace_fence(syncobjs[i], NULL); |
131280a1 | 1325 | |
aa4035d2 JE |
1326 | drm_syncobj_array_free(syncobjs, args->count_handles); |
1327 | ||
131280a1 | 1328 | return 0; |
aa4035d2 | 1329 | } |
ffa9443f JE |
1330 | |
1331 | int | |
1332 | drm_syncobj_signal_ioctl(struct drm_device *dev, void *data, | |
1333 | struct drm_file *file_private) | |
1334 | { | |
1335 | struct drm_syncobj_array *args = data; | |
1336 | struct drm_syncobj **syncobjs; | |
1337 | uint32_t i; | |
1338 | int ret; | |
1339 | ||
1340 | if (!drm_core_check_feature(dev, DRIVER_SYNCOBJ)) | |
69fdf420 | 1341 | return -EOPNOTSUPP; |
ffa9443f JE |
1342 | |
1343 | if (args->pad != 0) | |
1344 | return -EINVAL; | |
1345 | ||
1346 | if (args->count_handles == 0) | |
1347 | return -EINVAL; | |
1348 | ||
1349 | ret = drm_syncobj_array_find(file_private, | |
1350 | u64_to_user_ptr(args->handles), | |
1351 | args->count_handles, | |
1352 | &syncobjs); | |
1353 | if (ret < 0) | |
1354 | return ret; | |
1355 | ||
fd921693 DS |
1356 | for (i = 0; i < args->count_handles; i++) { |
1357 | ret = drm_syncobj_assign_null_handle(syncobjs[i]); | |
1358 | if (ret < 0) | |
1359 | break; | |
1360 | } | |
ffa9443f JE |
1361 | |
1362 | drm_syncobj_array_free(syncobjs, args->count_handles); | |
1363 | ||
1364 | return ret; | |
1365 | } | |
27b575a9 | 1366 | |
50d1ebef CZ |
1367 | int |
1368 | drm_syncobj_timeline_signal_ioctl(struct drm_device *dev, void *data, | |
1369 | struct drm_file *file_private) | |
1370 | { | |
1371 | struct drm_syncobj_timeline_array *args = data; | |
1372 | struct drm_syncobj **syncobjs; | |
1373 | struct dma_fence_chain **chains; | |
1374 | uint64_t *points; | |
1375 | uint32_t i, j; | |
1376 | int ret; | |
1377 | ||
060cebb2 | 1378 | if (!drm_core_check_feature(dev, DRIVER_SYNCOBJ_TIMELINE)) |
50d1ebef CZ |
1379 | return -EOPNOTSUPP; |
1380 | ||
2093dea3 | 1381 | if (args->flags != 0) |
50d1ebef CZ |
1382 | return -EINVAL; |
1383 | ||
1384 | if (args->count_handles == 0) | |
1385 | return -EINVAL; | |
1386 | ||
1387 | ret = drm_syncobj_array_find(file_private, | |
1388 | u64_to_user_ptr(args->handles), | |
1389 | args->count_handles, | |
1390 | &syncobjs); | |
1391 | if (ret < 0) | |
1392 | return ret; | |
1393 | ||
1394 | points = kmalloc_array(args->count_handles, sizeof(*points), | |
1395 | GFP_KERNEL); | |
1396 | if (!points) { | |
1397 | ret = -ENOMEM; | |
1398 | goto out; | |
1399 | } | |
1400 | if (!u64_to_user_ptr(args->points)) { | |
1401 | memset(points, 0, args->count_handles * sizeof(uint64_t)); | |
1402 | } else if (copy_from_user(points, u64_to_user_ptr(args->points), | |
1403 | sizeof(uint64_t) * args->count_handles)) { | |
1404 | ret = -EFAULT; | |
1405 | goto err_points; | |
1406 | } | |
1407 | ||
1408 | chains = kmalloc_array(args->count_handles, sizeof(void *), GFP_KERNEL); | |
1409 | if (!chains) { | |
1410 | ret = -ENOMEM; | |
1411 | goto err_points; | |
1412 | } | |
1413 | for (i = 0; i < args->count_handles; i++) { | |
440d0f12 | 1414 | chains[i] = dma_fence_chain_alloc(); |
50d1ebef CZ |
1415 | if (!chains[i]) { |
1416 | for (j = 0; j < i; j++) | |
440d0f12 | 1417 | dma_fence_chain_free(chains[j]); |
50d1ebef CZ |
1418 | ret = -ENOMEM; |
1419 | goto err_chains; | |
1420 | } | |
1421 | } | |
1422 | ||
1423 | for (i = 0; i < args->count_handles; i++) { | |
1424 | struct dma_fence *fence = dma_fence_get_stub(); | |
1425 | ||
1426 | drm_syncobj_add_point(syncobjs[i], chains[i], | |
1427 | fence, points[i]); | |
1428 | dma_fence_put(fence); | |
1429 | } | |
1430 | err_chains: | |
1431 | kfree(chains); | |
1432 | err_points: | |
1433 | kfree(points); | |
1434 | out: | |
1435 | drm_syncobj_array_free(syncobjs, args->count_handles); | |
1436 | ||
1437 | return ret; | |
1438 | } | |
1439 | ||
27b575a9 CZ |
1440 | int drm_syncobj_query_ioctl(struct drm_device *dev, void *data, |
1441 | struct drm_file *file_private) | |
1442 | { | |
1443 | struct drm_syncobj_timeline_array *args = data; | |
1444 | struct drm_syncobj **syncobjs; | |
1445 | uint64_t __user *points = u64_to_user_ptr(args->points); | |
1446 | uint32_t i; | |
1447 | int ret; | |
1448 | ||
060cebb2 LL |
1449 | if (!drm_core_check_feature(dev, DRIVER_SYNCOBJ_TIMELINE)) |
1450 | return -EOPNOTSUPP; | |
27b575a9 | 1451 | |
2093dea3 | 1452 | if (args->flags & ~DRM_SYNCOBJ_QUERY_FLAGS_LAST_SUBMITTED) |
27b575a9 CZ |
1453 | return -EINVAL; |
1454 | ||
1455 | if (args->count_handles == 0) | |
1456 | return -EINVAL; | |
1457 | ||
1458 | ret = drm_syncobj_array_find(file_private, | |
1459 | u64_to_user_ptr(args->handles), | |
1460 | args->count_handles, | |
1461 | &syncobjs); | |
1462 | if (ret < 0) | |
1463 | return ret; | |
1464 | ||
1465 | for (i = 0; i < args->count_handles; i++) { | |
1466 | struct dma_fence_chain *chain; | |
1467 | struct dma_fence *fence; | |
1468 | uint64_t point; | |
1469 | ||
1470 | fence = drm_syncobj_fence_get(syncobjs[i]); | |
1471 | chain = to_dma_fence_chain(fence); | |
1472 | if (chain) { | |
2093dea3 CZ |
1473 | struct dma_fence *iter, *last_signaled = |
1474 | dma_fence_get(fence); | |
1475 | ||
1476 | if (args->flags & | |
1477 | DRM_SYNCOBJ_QUERY_FLAGS_LAST_SUBMITTED) { | |
1478 | point = fence->seqno; | |
1479 | } else { | |
1480 | dma_fence_chain_for_each(iter, fence) { | |
1481 | if (iter->context != fence->context) { | |
1482 | dma_fence_put(iter); | |
1483 | /* It is most likely that timeline has | |
1484 | * unorder points. */ | |
1485 | break; | |
1486 | } | |
1487 | dma_fence_put(last_signaled); | |
1488 | last_signaled = dma_fence_get(iter); | |
b33b556c | 1489 | } |
2093dea3 CZ |
1490 | point = dma_fence_is_signaled(last_signaled) ? |
1491 | last_signaled->seqno : | |
1492 | to_dma_fence_chain(last_signaled)->prev_seqno; | |
27b575a9 | 1493 | } |
27b575a9 CZ |
1494 | dma_fence_put(last_signaled); |
1495 | } else { | |
1496 | point = 0; | |
1497 | } | |
2093dea3 | 1498 | dma_fence_put(fence); |
27b575a9 CZ |
1499 | ret = copy_to_user(&points[i], &point, sizeof(uint64_t)); |
1500 | ret = ret ? -EFAULT : 0; | |
1501 | if (ret) | |
1502 | break; | |
1503 | } | |
1504 | drm_syncobj_array_free(syncobjs, args->count_handles); | |
1505 | ||
1506 | return ret; | |
1507 | } |