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