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ae2a1040 TH |
1 | /************************************************************************** |
2 | * | |
3 | * Copyright © 2011 VMware, Inc., Palo Alto, CA., USA | |
4 | * All Rights Reserved. | |
5 | * | |
6 | * Permission is hereby granted, free of charge, to any person obtaining a | |
7 | * copy of this software and associated documentation files (the | |
8 | * "Software"), to deal in the Software without restriction, including | |
9 | * without limitation the rights to use, copy, modify, merge, publish, | |
10 | * distribute, sub license, and/or sell copies of the Software, and to | |
11 | * permit persons to whom the Software is furnished to do so, subject to | |
12 | * the following conditions: | |
13 | * | |
14 | * The above copyright notice and this permission notice (including the | |
15 | * next paragraph) shall be included in all copies or substantial portions | |
16 | * of the Software. | |
17 | * | |
18 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
19 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
20 | * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL | |
21 | * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, | |
22 | * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR | |
23 | * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE | |
24 | * USE OR OTHER DEALINGS IN THE SOFTWARE. | |
25 | * | |
26 | **************************************************************************/ | |
27 | ||
760285e7 | 28 | #include <drm/drmP.h> |
ae2a1040 TH |
29 | #include "vmwgfx_drv.h" |
30 | ||
31 | #define VMW_FENCE_WRAP (1 << 31) | |
32 | ||
33 | struct vmw_fence_manager { | |
34 | int num_fence_objects; | |
35 | struct vmw_private *dev_priv; | |
36 | spinlock_t lock; | |
ae2a1040 TH |
37 | struct list_head fence_list; |
38 | struct work_struct work; | |
39 | u32 user_fence_size; | |
40 | u32 fence_size; | |
57c5ee79 | 41 | u32 event_fence_action_size; |
ae2a1040 TH |
42 | bool fifo_down; |
43 | struct list_head cleanup_list; | |
57c5ee79 TH |
44 | uint32_t pending_actions[VMW_ACTION_MAX]; |
45 | struct mutex goal_irq_mutex; | |
46 | bool goal_irq_on; /* Protected by @goal_irq_mutex */ | |
47 | bool seqno_valid; /* Protected by @lock, and may not be set to true | |
48 | without the @goal_irq_mutex held. */ | |
ae2a1040 TH |
49 | }; |
50 | ||
51 | struct vmw_user_fence { | |
52 | struct ttm_base_object base; | |
53 | struct vmw_fence_obj fence; | |
54 | }; | |
55 | ||
56 | /** | |
57c5ee79 | 57 | * struct vmw_event_fence_action - fence action that delivers a drm event. |
ae2a1040 | 58 | * |
57c5ee79 TH |
59 | * @e: A struct drm_pending_event that controls the event delivery. |
60 | * @action: A struct vmw_fence_action to hook up to a fence. | |
61 | * @fence: A referenced pointer to the fence to keep it alive while @action | |
62 | * hangs on it. | |
63 | * @dev: Pointer to a struct drm_device so we can access the event stuff. | |
64 | * @kref: Both @e and @action has destructors, so we need to refcount. | |
65 | * @size: Size accounted for this object. | |
66 | * @tv_sec: If non-null, the variable pointed to will be assigned | |
67 | * current time tv_sec val when the fence signals. | |
68 | * @tv_usec: Must be set if @tv_sec is set, and the variable pointed to will | |
69 | * be assigned the current time tv_usec val when the fence signals. | |
70 | */ | |
71 | struct vmw_event_fence_action { | |
57c5ee79 | 72 | struct vmw_fence_action action; |
6b82ef50 | 73 | struct list_head fpriv_head; |
8b7de6aa JB |
74 | |
75 | struct drm_pending_event *event; | |
57c5ee79 TH |
76 | struct vmw_fence_obj *fence; |
77 | struct drm_device *dev; | |
8b7de6aa | 78 | |
57c5ee79 TH |
79 | uint32_t *tv_sec; |
80 | uint32_t *tv_usec; | |
81 | }; | |
82 | ||
83 | /** | |
84 | * Note on fencing subsystem usage of irqs: | |
85 | * Typically the vmw_fences_update function is called | |
86 | * | |
87 | * a) When a new fence seqno has been submitted by the fifo code. | |
88 | * b) On-demand when we have waiters. Sleeping waiters will switch on the | |
89 | * ANY_FENCE irq and call vmw_fences_update function each time an ANY_FENCE | |
90 | * irq is received. When the last fence waiter is gone, that IRQ is masked | |
91 | * away. | |
92 | * | |
93 | * In situations where there are no waiters and we don't submit any new fences, | |
94 | * fence objects may not be signaled. This is perfectly OK, since there are | |
95 | * no consumers of the signaled data, but that is NOT ok when there are fence | |
96 | * actions attached to a fence. The fencing subsystem then makes use of the | |
97 | * FENCE_GOAL irq and sets the fence goal seqno to that of the next fence | |
98 | * which has an action attached, and each time vmw_fences_update is called, | |
99 | * the subsystem makes sure the fence goal seqno is updated. | |
100 | * | |
101 | * The fence goal seqno irq is on as long as there are unsignaled fence | |
102 | * objects with actions attached to them. | |
ae2a1040 TH |
103 | */ |
104 | ||
105 | static void vmw_fence_obj_destroy_locked(struct kref *kref) | |
106 | { | |
107 | struct vmw_fence_obj *fence = | |
108 | container_of(kref, struct vmw_fence_obj, kref); | |
109 | ||
110 | struct vmw_fence_manager *fman = fence->fman; | |
111 | unsigned int num_fences; | |
112 | ||
113 | list_del_init(&fence->head); | |
114 | num_fences = --fman->num_fence_objects; | |
115 | spin_unlock_irq(&fman->lock); | |
116 | if (fence->destroy) | |
117 | fence->destroy(fence); | |
118 | else | |
119 | kfree(fence); | |
120 | ||
121 | spin_lock_irq(&fman->lock); | |
122 | } | |
123 | ||
124 | ||
125 | /** | |
126 | * Execute signal actions on fences recently signaled. | |
127 | * This is done from a workqueue so we don't have to execute | |
128 | * signal actions from atomic context. | |
129 | */ | |
130 | ||
131 | static void vmw_fence_work_func(struct work_struct *work) | |
132 | { | |
133 | struct vmw_fence_manager *fman = | |
134 | container_of(work, struct vmw_fence_manager, work); | |
135 | struct list_head list; | |
136 | struct vmw_fence_action *action, *next_action; | |
57c5ee79 | 137 | bool seqno_valid; |
ae2a1040 TH |
138 | |
139 | do { | |
140 | INIT_LIST_HEAD(&list); | |
57c5ee79 TH |
141 | mutex_lock(&fman->goal_irq_mutex); |
142 | ||
ae2a1040 TH |
143 | spin_lock_irq(&fman->lock); |
144 | list_splice_init(&fman->cleanup_list, &list); | |
57c5ee79 | 145 | seqno_valid = fman->seqno_valid; |
ae2a1040 TH |
146 | spin_unlock_irq(&fman->lock); |
147 | ||
57c5ee79 TH |
148 | if (!seqno_valid && fman->goal_irq_on) { |
149 | fman->goal_irq_on = false; | |
150 | vmw_goal_waiter_remove(fman->dev_priv); | |
151 | } | |
152 | mutex_unlock(&fman->goal_irq_mutex); | |
153 | ||
ae2a1040 TH |
154 | if (list_empty(&list)) |
155 | return; | |
156 | ||
157 | /* | |
158 | * At this point, only we should be able to manipulate the | |
159 | * list heads of the actions we have on the private list. | |
57c5ee79 | 160 | * hence fman::lock not held. |
ae2a1040 TH |
161 | */ |
162 | ||
163 | list_for_each_entry_safe(action, next_action, &list, head) { | |
164 | list_del_init(&action->head); | |
57c5ee79 TH |
165 | if (action->cleanup) |
166 | action->cleanup(action); | |
ae2a1040 TH |
167 | } |
168 | } while (1); | |
169 | } | |
170 | ||
171 | struct vmw_fence_manager *vmw_fence_manager_init(struct vmw_private *dev_priv) | |
172 | { | |
173 | struct vmw_fence_manager *fman = kzalloc(sizeof(*fman), GFP_KERNEL); | |
174 | ||
175 | if (unlikely(fman == NULL)) | |
176 | return NULL; | |
177 | ||
178 | fman->dev_priv = dev_priv; | |
179 | spin_lock_init(&fman->lock); | |
180 | INIT_LIST_HEAD(&fman->fence_list); | |
181 | INIT_LIST_HEAD(&fman->cleanup_list); | |
182 | INIT_WORK(&fman->work, &vmw_fence_work_func); | |
183 | fman->fifo_down = true; | |
184 | fman->user_fence_size = ttm_round_pot(sizeof(struct vmw_user_fence)); | |
185 | fman->fence_size = ttm_round_pot(sizeof(struct vmw_fence_obj)); | |
57c5ee79 TH |
186 | fman->event_fence_action_size = |
187 | ttm_round_pot(sizeof(struct vmw_event_fence_action)); | |
188 | mutex_init(&fman->goal_irq_mutex); | |
ae2a1040 TH |
189 | |
190 | return fman; | |
191 | } | |
192 | ||
193 | void vmw_fence_manager_takedown(struct vmw_fence_manager *fman) | |
194 | { | |
195 | unsigned long irq_flags; | |
196 | bool lists_empty; | |
197 | ||
198 | (void) cancel_work_sync(&fman->work); | |
199 | ||
200 | spin_lock_irqsave(&fman->lock, irq_flags); | |
201 | lists_empty = list_empty(&fman->fence_list) && | |
202 | list_empty(&fman->cleanup_list); | |
203 | spin_unlock_irqrestore(&fman->lock, irq_flags); | |
204 | ||
205 | BUG_ON(!lists_empty); | |
206 | kfree(fman); | |
207 | } | |
208 | ||
209 | static int vmw_fence_obj_init(struct vmw_fence_manager *fman, | |
210 | struct vmw_fence_obj *fence, | |
211 | u32 seqno, | |
212 | uint32_t mask, | |
213 | void (*destroy) (struct vmw_fence_obj *fence)) | |
214 | { | |
215 | unsigned long irq_flags; | |
216 | unsigned int num_fences; | |
217 | int ret = 0; | |
218 | ||
219 | fence->seqno = seqno; | |
220 | INIT_LIST_HEAD(&fence->seq_passed_actions); | |
221 | fence->fman = fman; | |
222 | fence->signaled = 0; | |
223 | fence->signal_mask = mask; | |
224 | kref_init(&fence->kref); | |
225 | fence->destroy = destroy; | |
226 | init_waitqueue_head(&fence->queue); | |
227 | ||
228 | spin_lock_irqsave(&fman->lock, irq_flags); | |
229 | if (unlikely(fman->fifo_down)) { | |
230 | ret = -EBUSY; | |
231 | goto out_unlock; | |
232 | } | |
233 | list_add_tail(&fence->head, &fman->fence_list); | |
234 | num_fences = ++fman->num_fence_objects; | |
235 | ||
236 | out_unlock: | |
237 | spin_unlock_irqrestore(&fman->lock, irq_flags); | |
238 | return ret; | |
239 | ||
240 | } | |
241 | ||
242 | struct vmw_fence_obj *vmw_fence_obj_reference(struct vmw_fence_obj *fence) | |
243 | { | |
e93daed8 TH |
244 | if (unlikely(fence == NULL)) |
245 | return NULL; | |
246 | ||
ae2a1040 TH |
247 | kref_get(&fence->kref); |
248 | return fence; | |
249 | } | |
250 | ||
251 | /** | |
252 | * vmw_fence_obj_unreference | |
253 | * | |
254 | * Note that this function may not be entered with disabled irqs since | |
255 | * it may re-enable them in the destroy function. | |
256 | * | |
257 | */ | |
258 | void vmw_fence_obj_unreference(struct vmw_fence_obj **fence_p) | |
259 | { | |
260 | struct vmw_fence_obj *fence = *fence_p; | |
e93daed8 TH |
261 | struct vmw_fence_manager *fman; |
262 | ||
263 | if (unlikely(fence == NULL)) | |
264 | return; | |
ae2a1040 | 265 | |
e93daed8 | 266 | fman = fence->fman; |
ae2a1040 TH |
267 | *fence_p = NULL; |
268 | spin_lock_irq(&fman->lock); | |
269 | BUG_ON(atomic_read(&fence->kref.refcount) == 0); | |
270 | kref_put(&fence->kref, vmw_fence_obj_destroy_locked); | |
271 | spin_unlock_irq(&fman->lock); | |
272 | } | |
273 | ||
274 | void vmw_fences_perform_actions(struct vmw_fence_manager *fman, | |
275 | struct list_head *list) | |
276 | { | |
277 | struct vmw_fence_action *action, *next_action; | |
278 | ||
279 | list_for_each_entry_safe(action, next_action, list, head) { | |
280 | list_del_init(&action->head); | |
57c5ee79 | 281 | fman->pending_actions[action->type]--; |
ae2a1040 TH |
282 | if (action->seq_passed != NULL) |
283 | action->seq_passed(action); | |
284 | ||
285 | /* | |
286 | * Add the cleanup action to the cleanup list so that | |
287 | * it will be performed by a worker task. | |
288 | */ | |
289 | ||
57c5ee79 TH |
290 | list_add_tail(&action->head, &fman->cleanup_list); |
291 | } | |
292 | } | |
293 | ||
294 | /** | |
295 | * vmw_fence_goal_new_locked - Figure out a new device fence goal | |
296 | * seqno if needed. | |
297 | * | |
298 | * @fman: Pointer to a fence manager. | |
299 | * @passed_seqno: The seqno the device currently signals as passed. | |
300 | * | |
301 | * This function should be called with the fence manager lock held. | |
302 | * It is typically called when we have a new passed_seqno, and | |
303 | * we might need to update the fence goal. It checks to see whether | |
304 | * the current fence goal has already passed, and, in that case, | |
305 | * scans through all unsignaled fences to get the next fence object with an | |
306 | * action attached, and sets the seqno of that fence as a new fence goal. | |
307 | * | |
308 | * returns true if the device goal seqno was updated. False otherwise. | |
309 | */ | |
310 | static bool vmw_fence_goal_new_locked(struct vmw_fence_manager *fman, | |
311 | u32 passed_seqno) | |
312 | { | |
313 | u32 goal_seqno; | |
314 | __le32 __iomem *fifo_mem; | |
315 | struct vmw_fence_obj *fence; | |
316 | ||
317 | if (likely(!fman->seqno_valid)) | |
318 | return false; | |
319 | ||
320 | fifo_mem = fman->dev_priv->mmio_virt; | |
321 | goal_seqno = ioread32(fifo_mem + SVGA_FIFO_FENCE_GOAL); | |
322 | if (likely(passed_seqno - goal_seqno >= VMW_FENCE_WRAP)) | |
323 | return false; | |
324 | ||
325 | fman->seqno_valid = false; | |
326 | list_for_each_entry(fence, &fman->fence_list, head) { | |
327 | if (!list_empty(&fence->seq_passed_actions)) { | |
328 | fman->seqno_valid = true; | |
329 | iowrite32(fence->seqno, | |
330 | fifo_mem + SVGA_FIFO_FENCE_GOAL); | |
331 | break; | |
332 | } | |
ae2a1040 | 333 | } |
57c5ee79 TH |
334 | |
335 | return true; | |
336 | } | |
337 | ||
338 | ||
339 | /** | |
340 | * vmw_fence_goal_check_locked - Replace the device fence goal seqno if | |
341 | * needed. | |
342 | * | |
343 | * @fence: Pointer to a struct vmw_fence_obj the seqno of which should be | |
344 | * considered as a device fence goal. | |
345 | * | |
346 | * This function should be called with the fence manager lock held. | |
347 | * It is typically called when an action has been attached to a fence to | |
348 | * check whether the seqno of that fence should be used for a fence | |
349 | * goal interrupt. This is typically needed if the current fence goal is | |
350 | * invalid, or has a higher seqno than that of the current fence object. | |
351 | * | |
352 | * returns true if the device goal seqno was updated. False otherwise. | |
353 | */ | |
354 | static bool vmw_fence_goal_check_locked(struct vmw_fence_obj *fence) | |
355 | { | |
356 | u32 goal_seqno; | |
357 | __le32 __iomem *fifo_mem; | |
358 | ||
359 | if (fence->signaled & DRM_VMW_FENCE_FLAG_EXEC) | |
360 | return false; | |
361 | ||
362 | fifo_mem = fence->fman->dev_priv->mmio_virt; | |
363 | goal_seqno = ioread32(fifo_mem + SVGA_FIFO_FENCE_GOAL); | |
364 | if (likely(fence->fman->seqno_valid && | |
365 | goal_seqno - fence->seqno < VMW_FENCE_WRAP)) | |
366 | return false; | |
367 | ||
368 | iowrite32(fence->seqno, fifo_mem + SVGA_FIFO_FENCE_GOAL); | |
369 | fence->fman->seqno_valid = true; | |
370 | ||
371 | return true; | |
ae2a1040 TH |
372 | } |
373 | ||
57c5ee79 | 374 | void vmw_fences_update(struct vmw_fence_manager *fman) |
ae2a1040 TH |
375 | { |
376 | unsigned long flags; | |
377 | struct vmw_fence_obj *fence, *next_fence; | |
378 | struct list_head action_list; | |
57c5ee79 TH |
379 | bool needs_rerun; |
380 | uint32_t seqno, new_seqno; | |
381 | __le32 __iomem *fifo_mem = fman->dev_priv->mmio_virt; | |
ae2a1040 | 382 | |
57c5ee79 TH |
383 | seqno = ioread32(fifo_mem + SVGA_FIFO_FENCE); |
384 | rerun: | |
ae2a1040 TH |
385 | spin_lock_irqsave(&fman->lock, flags); |
386 | list_for_each_entry_safe(fence, next_fence, &fman->fence_list, head) { | |
387 | if (seqno - fence->seqno < VMW_FENCE_WRAP) { | |
388 | list_del_init(&fence->head); | |
389 | fence->signaled |= DRM_VMW_FENCE_FLAG_EXEC; | |
390 | INIT_LIST_HEAD(&action_list); | |
391 | list_splice_init(&fence->seq_passed_actions, | |
392 | &action_list); | |
393 | vmw_fences_perform_actions(fman, &action_list); | |
394 | wake_up_all(&fence->queue); | |
57c5ee79 TH |
395 | } else |
396 | break; | |
ae2a1040 | 397 | } |
57c5ee79 TH |
398 | |
399 | needs_rerun = vmw_fence_goal_new_locked(fman, seqno); | |
400 | ||
ae2a1040 TH |
401 | if (!list_empty(&fman->cleanup_list)) |
402 | (void) schedule_work(&fman->work); | |
403 | spin_unlock_irqrestore(&fman->lock, flags); | |
ae2a1040 | 404 | |
57c5ee79 TH |
405 | /* |
406 | * Rerun if the fence goal seqno was updated, and the | |
407 | * hardware might have raced with that update, so that | |
408 | * we missed a fence_goal irq. | |
409 | */ | |
410 | ||
411 | if (unlikely(needs_rerun)) { | |
412 | new_seqno = ioread32(fifo_mem + SVGA_FIFO_FENCE); | |
413 | if (new_seqno != seqno) { | |
414 | seqno = new_seqno; | |
415 | goto rerun; | |
416 | } | |
417 | } | |
418 | } | |
ae2a1040 TH |
419 | |
420 | bool vmw_fence_obj_signaled(struct vmw_fence_obj *fence, | |
421 | uint32_t flags) | |
422 | { | |
423 | struct vmw_fence_manager *fman = fence->fman; | |
424 | unsigned long irq_flags; | |
425 | uint32_t signaled; | |
426 | ||
427 | spin_lock_irqsave(&fman->lock, irq_flags); | |
428 | signaled = fence->signaled; | |
429 | spin_unlock_irqrestore(&fman->lock, irq_flags); | |
430 | ||
431 | flags &= fence->signal_mask; | |
432 | if ((signaled & flags) == flags) | |
433 | return 1; | |
434 | ||
57c5ee79 TH |
435 | if ((signaled & DRM_VMW_FENCE_FLAG_EXEC) == 0) |
436 | vmw_fences_update(fman); | |
ae2a1040 TH |
437 | |
438 | spin_lock_irqsave(&fman->lock, irq_flags); | |
439 | signaled = fence->signaled; | |
440 | spin_unlock_irqrestore(&fman->lock, irq_flags); | |
441 | ||
442 | return ((signaled & flags) == flags); | |
443 | } | |
444 | ||
445 | int vmw_fence_obj_wait(struct vmw_fence_obj *fence, | |
446 | uint32_t flags, bool lazy, | |
447 | bool interruptible, unsigned long timeout) | |
448 | { | |
449 | struct vmw_private *dev_priv = fence->fman->dev_priv; | |
450 | long ret; | |
451 | ||
452 | if (likely(vmw_fence_obj_signaled(fence, flags))) | |
453 | return 0; | |
454 | ||
455 | vmw_fifo_ping_host(dev_priv, SVGA_SYNC_GENERIC); | |
456 | vmw_seqno_waiter_add(dev_priv); | |
457 | ||
458 | if (interruptible) | |
459 | ret = wait_event_interruptible_timeout | |
460 | (fence->queue, | |
461 | vmw_fence_obj_signaled(fence, flags), | |
462 | timeout); | |
463 | else | |
464 | ret = wait_event_timeout | |
465 | (fence->queue, | |
466 | vmw_fence_obj_signaled(fence, flags), | |
467 | timeout); | |
468 | ||
469 | vmw_seqno_waiter_remove(dev_priv); | |
470 | ||
471 | if (unlikely(ret == 0)) | |
472 | ret = -EBUSY; | |
473 | else if (likely(ret > 0)) | |
474 | ret = 0; | |
475 | ||
476 | return ret; | |
477 | } | |
478 | ||
479 | void vmw_fence_obj_flush(struct vmw_fence_obj *fence) | |
480 | { | |
481 | struct vmw_private *dev_priv = fence->fman->dev_priv; | |
482 | ||
483 | vmw_fifo_ping_host(dev_priv, SVGA_SYNC_GENERIC); | |
484 | } | |
485 | ||
486 | static void vmw_fence_destroy(struct vmw_fence_obj *fence) | |
487 | { | |
488 | struct vmw_fence_manager *fman = fence->fman; | |
489 | ||
490 | kfree(fence); | |
491 | /* | |
492 | * Free kernel space accounting. | |
493 | */ | |
494 | ttm_mem_global_free(vmw_mem_glob(fman->dev_priv), | |
495 | fman->fence_size); | |
496 | } | |
497 | ||
498 | int vmw_fence_create(struct vmw_fence_manager *fman, | |
499 | uint32_t seqno, | |
500 | uint32_t mask, | |
501 | struct vmw_fence_obj **p_fence) | |
502 | { | |
503 | struct ttm_mem_global *mem_glob = vmw_mem_glob(fman->dev_priv); | |
504 | struct vmw_fence_obj *fence; | |
505 | int ret; | |
506 | ||
507 | ret = ttm_mem_global_alloc(mem_glob, fman->fence_size, | |
508 | false, false); | |
509 | if (unlikely(ret != 0)) | |
510 | return ret; | |
511 | ||
512 | fence = kzalloc(sizeof(*fence), GFP_KERNEL); | |
513 | if (unlikely(fence == NULL)) { | |
514 | ret = -ENOMEM; | |
515 | goto out_no_object; | |
516 | } | |
517 | ||
518 | ret = vmw_fence_obj_init(fman, fence, seqno, mask, | |
519 | vmw_fence_destroy); | |
520 | if (unlikely(ret != 0)) | |
521 | goto out_err_init; | |
522 | ||
523 | *p_fence = fence; | |
524 | return 0; | |
525 | ||
526 | out_err_init: | |
527 | kfree(fence); | |
528 | out_no_object: | |
529 | ttm_mem_global_free(mem_glob, fman->fence_size); | |
530 | return ret; | |
531 | } | |
532 | ||
533 | ||
534 | static void vmw_user_fence_destroy(struct vmw_fence_obj *fence) | |
535 | { | |
536 | struct vmw_user_fence *ufence = | |
537 | container_of(fence, struct vmw_user_fence, fence); | |
538 | struct vmw_fence_manager *fman = fence->fman; | |
539 | ||
540 | kfree(ufence); | |
541 | /* | |
542 | * Free kernel space accounting. | |
543 | */ | |
544 | ttm_mem_global_free(vmw_mem_glob(fman->dev_priv), | |
545 | fman->user_fence_size); | |
546 | } | |
547 | ||
548 | static void vmw_user_fence_base_release(struct ttm_base_object **p_base) | |
549 | { | |
550 | struct ttm_base_object *base = *p_base; | |
551 | struct vmw_user_fence *ufence = | |
552 | container_of(base, struct vmw_user_fence, base); | |
553 | struct vmw_fence_obj *fence = &ufence->fence; | |
554 | ||
555 | *p_base = NULL; | |
556 | vmw_fence_obj_unreference(&fence); | |
557 | } | |
558 | ||
559 | int vmw_user_fence_create(struct drm_file *file_priv, | |
560 | struct vmw_fence_manager *fman, | |
561 | uint32_t seqno, | |
562 | uint32_t mask, | |
563 | struct vmw_fence_obj **p_fence, | |
564 | uint32_t *p_handle) | |
565 | { | |
566 | struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile; | |
567 | struct vmw_user_fence *ufence; | |
568 | struct vmw_fence_obj *tmp; | |
569 | struct ttm_mem_global *mem_glob = vmw_mem_glob(fman->dev_priv); | |
570 | int ret; | |
571 | ||
572 | /* | |
573 | * Kernel memory space accounting, since this object may | |
574 | * be created by a user-space request. | |
575 | */ | |
576 | ||
577 | ret = ttm_mem_global_alloc(mem_glob, fman->user_fence_size, | |
578 | false, false); | |
579 | if (unlikely(ret != 0)) | |
580 | return ret; | |
581 | ||
582 | ufence = kzalloc(sizeof(*ufence), GFP_KERNEL); | |
583 | if (unlikely(ufence == NULL)) { | |
584 | ret = -ENOMEM; | |
585 | goto out_no_object; | |
586 | } | |
587 | ||
588 | ret = vmw_fence_obj_init(fman, &ufence->fence, seqno, | |
589 | mask, vmw_user_fence_destroy); | |
590 | if (unlikely(ret != 0)) { | |
591 | kfree(ufence); | |
592 | goto out_no_object; | |
593 | } | |
594 | ||
595 | /* | |
596 | * The base object holds a reference which is freed in | |
597 | * vmw_user_fence_base_release. | |
598 | */ | |
599 | tmp = vmw_fence_obj_reference(&ufence->fence); | |
600 | ret = ttm_base_object_init(tfile, &ufence->base, false, | |
601 | VMW_RES_FENCE, | |
602 | &vmw_user_fence_base_release, NULL); | |
603 | ||
604 | ||
605 | if (unlikely(ret != 0)) { | |
606 | /* | |
607 | * Free the base object's reference | |
608 | */ | |
609 | vmw_fence_obj_unreference(&tmp); | |
610 | goto out_err; | |
611 | } | |
612 | ||
613 | *p_fence = &ufence->fence; | |
614 | *p_handle = ufence->base.hash.key; | |
615 | ||
616 | return 0; | |
617 | out_err: | |
618 | tmp = &ufence->fence; | |
619 | vmw_fence_obj_unreference(&tmp); | |
620 | out_no_object: | |
621 | ttm_mem_global_free(mem_glob, fman->user_fence_size); | |
622 | return ret; | |
623 | } | |
624 | ||
625 | ||
626 | /** | |
627 | * vmw_fence_fifo_down - signal all unsignaled fence objects. | |
628 | */ | |
629 | ||
630 | void vmw_fence_fifo_down(struct vmw_fence_manager *fman) | |
631 | { | |
632 | unsigned long irq_flags; | |
633 | struct list_head action_list; | |
634 | int ret; | |
635 | ||
636 | /* | |
637 | * The list may be altered while we traverse it, so always | |
638 | * restart when we've released the fman->lock. | |
639 | */ | |
640 | ||
641 | spin_lock_irqsave(&fman->lock, irq_flags); | |
642 | fman->fifo_down = true; | |
643 | while (!list_empty(&fman->fence_list)) { | |
644 | struct vmw_fence_obj *fence = | |
645 | list_entry(fman->fence_list.prev, struct vmw_fence_obj, | |
646 | head); | |
647 | kref_get(&fence->kref); | |
648 | spin_unlock_irq(&fman->lock); | |
649 | ||
650 | ret = vmw_fence_obj_wait(fence, fence->signal_mask, | |
651 | false, false, | |
652 | VMW_FENCE_WAIT_TIMEOUT); | |
653 | ||
654 | if (unlikely(ret != 0)) { | |
655 | list_del_init(&fence->head); | |
656 | fence->signaled |= DRM_VMW_FENCE_FLAG_EXEC; | |
657 | INIT_LIST_HEAD(&action_list); | |
658 | list_splice_init(&fence->seq_passed_actions, | |
659 | &action_list); | |
660 | vmw_fences_perform_actions(fman, &action_list); | |
661 | wake_up_all(&fence->queue); | |
662 | } | |
663 | ||
664 | spin_lock_irq(&fman->lock); | |
665 | ||
666 | BUG_ON(!list_empty(&fence->head)); | |
667 | kref_put(&fence->kref, vmw_fence_obj_destroy_locked); | |
668 | } | |
669 | spin_unlock_irqrestore(&fman->lock, irq_flags); | |
670 | } | |
671 | ||
672 | void vmw_fence_fifo_up(struct vmw_fence_manager *fman) | |
673 | { | |
674 | unsigned long irq_flags; | |
675 | ||
676 | spin_lock_irqsave(&fman->lock, irq_flags); | |
677 | fman->fifo_down = false; | |
678 | spin_unlock_irqrestore(&fman->lock, irq_flags); | |
679 | } | |
680 | ||
681 | ||
682 | int vmw_fence_obj_wait_ioctl(struct drm_device *dev, void *data, | |
683 | struct drm_file *file_priv) | |
684 | { | |
685 | struct drm_vmw_fence_wait_arg *arg = | |
686 | (struct drm_vmw_fence_wait_arg *)data; | |
687 | unsigned long timeout; | |
688 | struct ttm_base_object *base; | |
689 | struct vmw_fence_obj *fence; | |
690 | struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile; | |
691 | int ret; | |
692 | uint64_t wait_timeout = ((uint64_t)arg->timeout_us * HZ); | |
693 | ||
694 | /* | |
695 | * 64-bit division not present on 32-bit systems, so do an | |
696 | * approximation. (Divide by 1000000). | |
697 | */ | |
698 | ||
699 | wait_timeout = (wait_timeout >> 20) + (wait_timeout >> 24) - | |
700 | (wait_timeout >> 26); | |
701 | ||
702 | if (!arg->cookie_valid) { | |
703 | arg->cookie_valid = 1; | |
704 | arg->kernel_cookie = jiffies + wait_timeout; | |
705 | } | |
706 | ||
707 | base = ttm_base_object_lookup(tfile, arg->handle); | |
708 | if (unlikely(base == NULL)) { | |
709 | printk(KERN_ERR "Wait invalid fence object handle " | |
710 | "0x%08lx.\n", | |
711 | (unsigned long)arg->handle); | |
712 | return -EINVAL; | |
713 | } | |
714 | ||
715 | fence = &(container_of(base, struct vmw_user_fence, base)->fence); | |
716 | ||
717 | timeout = jiffies; | |
718 | if (time_after_eq(timeout, (unsigned long)arg->kernel_cookie)) { | |
719 | ret = ((vmw_fence_obj_signaled(fence, arg->flags)) ? | |
720 | 0 : -EBUSY); | |
721 | goto out; | |
722 | } | |
723 | ||
724 | timeout = (unsigned long)arg->kernel_cookie - timeout; | |
725 | ||
726 | ret = vmw_fence_obj_wait(fence, arg->flags, arg->lazy, true, timeout); | |
727 | ||
728 | out: | |
729 | ttm_base_object_unref(&base); | |
730 | ||
731 | /* | |
732 | * Optionally unref the fence object. | |
733 | */ | |
734 | ||
735 | if (ret == 0 && (arg->wait_options & DRM_VMW_WAIT_OPTION_UNREF)) | |
736 | return ttm_ref_object_base_unref(tfile, arg->handle, | |
737 | TTM_REF_USAGE); | |
738 | return ret; | |
739 | } | |
740 | ||
741 | int vmw_fence_obj_signaled_ioctl(struct drm_device *dev, void *data, | |
742 | struct drm_file *file_priv) | |
743 | { | |
744 | struct drm_vmw_fence_signaled_arg *arg = | |
745 | (struct drm_vmw_fence_signaled_arg *) data; | |
746 | struct ttm_base_object *base; | |
747 | struct vmw_fence_obj *fence; | |
748 | struct vmw_fence_manager *fman; | |
749 | struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile; | |
750 | struct vmw_private *dev_priv = vmw_priv(dev); | |
751 | ||
752 | base = ttm_base_object_lookup(tfile, arg->handle); | |
753 | if (unlikely(base == NULL)) { | |
754 | printk(KERN_ERR "Fence signaled invalid fence object handle " | |
755 | "0x%08lx.\n", | |
756 | (unsigned long)arg->handle); | |
757 | return -EINVAL; | |
758 | } | |
759 | ||
760 | fence = &(container_of(base, struct vmw_user_fence, base)->fence); | |
761 | fman = fence->fman; | |
762 | ||
763 | arg->signaled = vmw_fence_obj_signaled(fence, arg->flags); | |
764 | spin_lock_irq(&fman->lock); | |
765 | ||
766 | arg->signaled_flags = fence->signaled; | |
767 | arg->passed_seqno = dev_priv->last_read_seqno; | |
768 | spin_unlock_irq(&fman->lock); | |
769 | ||
770 | ttm_base_object_unref(&base); | |
771 | ||
772 | return 0; | |
773 | } | |
774 | ||
775 | ||
776 | int vmw_fence_obj_unref_ioctl(struct drm_device *dev, void *data, | |
777 | struct drm_file *file_priv) | |
778 | { | |
779 | struct drm_vmw_fence_arg *arg = | |
780 | (struct drm_vmw_fence_arg *) data; | |
781 | ||
782 | return ttm_ref_object_base_unref(vmw_fpriv(file_priv)->tfile, | |
783 | arg->handle, | |
784 | TTM_REF_USAGE); | |
785 | } | |
57c5ee79 | 786 | |
6b82ef50 TH |
787 | /** |
788 | * vmw_event_fence_fpriv_gone - Remove references to struct drm_file objects | |
789 | * | |
790 | * @fman: Pointer to a struct vmw_fence_manager | |
791 | * @event_list: Pointer to linked list of struct vmw_event_fence_action objects | |
792 | * with pointers to a struct drm_file object about to be closed. | |
793 | * | |
794 | * This function removes all pending fence events with references to a | |
795 | * specific struct drm_file object about to be closed. The caller is required | |
796 | * to pass a list of all struct vmw_event_fence_action objects with such | |
797 | * events attached. This function is typically called before the | |
798 | * struct drm_file object's event management is taken down. | |
799 | */ | |
800 | void vmw_event_fence_fpriv_gone(struct vmw_fence_manager *fman, | |
801 | struct list_head *event_list) | |
802 | { | |
803 | struct vmw_event_fence_action *eaction; | |
804 | struct drm_pending_event *event; | |
805 | unsigned long irq_flags; | |
806 | ||
807 | while (1) { | |
808 | spin_lock_irqsave(&fman->lock, irq_flags); | |
809 | if (list_empty(event_list)) | |
810 | goto out_unlock; | |
811 | eaction = list_first_entry(event_list, | |
812 | struct vmw_event_fence_action, | |
813 | fpriv_head); | |
814 | list_del_init(&eaction->fpriv_head); | |
815 | event = eaction->event; | |
816 | eaction->event = NULL; | |
817 | spin_unlock_irqrestore(&fman->lock, irq_flags); | |
818 | event->destroy(event); | |
819 | } | |
820 | out_unlock: | |
821 | spin_unlock_irqrestore(&fman->lock, irq_flags); | |
822 | } | |
823 | ||
57c5ee79 TH |
824 | |
825 | /** | |
826 | * vmw_event_fence_action_seq_passed | |
827 | * | |
828 | * @action: The struct vmw_fence_action embedded in a struct | |
829 | * vmw_event_fence_action. | |
830 | * | |
831 | * This function is called when the seqno of the fence where @action is | |
832 | * attached has passed. It queues the event on the submitter's event list. | |
833 | * This function is always called from atomic context, and may be called | |
8b7de6aa | 834 | * from irq context. |
57c5ee79 TH |
835 | */ |
836 | static void vmw_event_fence_action_seq_passed(struct vmw_fence_action *action) | |
837 | { | |
838 | struct vmw_event_fence_action *eaction = | |
839 | container_of(action, struct vmw_event_fence_action, action); | |
840 | struct drm_device *dev = eaction->dev; | |
6b82ef50 TH |
841 | struct drm_pending_event *event = eaction->event; |
842 | struct drm_file *file_priv; | |
57c5ee79 TH |
843 | unsigned long irq_flags; |
844 | ||
6b82ef50 TH |
845 | if (unlikely(event == NULL)) |
846 | return; | |
847 | ||
848 | file_priv = event->file_priv; | |
57c5ee79 TH |
849 | spin_lock_irqsave(&dev->event_lock, irq_flags); |
850 | ||
851 | if (likely(eaction->tv_sec != NULL)) { | |
852 | struct timeval tv; | |
853 | ||
854 | do_gettimeofday(&tv); | |
855 | *eaction->tv_sec = tv.tv_sec; | |
856 | *eaction->tv_usec = tv.tv_usec; | |
857 | } | |
858 | ||
6b82ef50 | 859 | list_del_init(&eaction->fpriv_head); |
8b7de6aa | 860 | list_add_tail(&eaction->event->link, &file_priv->event_list); |
6b82ef50 | 861 | eaction->event = NULL; |
57c5ee79 TH |
862 | wake_up_all(&file_priv->event_wait); |
863 | spin_unlock_irqrestore(&dev->event_lock, irq_flags); | |
864 | } | |
865 | ||
866 | /** | |
867 | * vmw_event_fence_action_cleanup | |
868 | * | |
869 | * @action: The struct vmw_fence_action embedded in a struct | |
870 | * vmw_event_fence_action. | |
871 | * | |
872 | * This function is the struct vmw_fence_action destructor. It's typically | |
873 | * called from a workqueue. | |
874 | */ | |
875 | static void vmw_event_fence_action_cleanup(struct vmw_fence_action *action) | |
876 | { | |
877 | struct vmw_event_fence_action *eaction = | |
878 | container_of(action, struct vmw_event_fence_action, action); | |
6b82ef50 TH |
879 | struct vmw_fence_manager *fman = eaction->fence->fman; |
880 | unsigned long irq_flags; | |
881 | ||
882 | spin_lock_irqsave(&fman->lock, irq_flags); | |
883 | list_del(&eaction->fpriv_head); | |
884 | spin_unlock_irqrestore(&fman->lock, irq_flags); | |
57c5ee79 TH |
885 | |
886 | vmw_fence_obj_unreference(&eaction->fence); | |
8b7de6aa | 887 | kfree(eaction); |
57c5ee79 TH |
888 | } |
889 | ||
890 | ||
891 | /** | |
892 | * vmw_fence_obj_add_action - Add an action to a fence object. | |
893 | * | |
894 | * @fence - The fence object. | |
895 | * @action - The action to add. | |
896 | * | |
897 | * Note that the action callbacks may be executed before this function | |
898 | * returns. | |
899 | */ | |
900 | void vmw_fence_obj_add_action(struct vmw_fence_obj *fence, | |
901 | struct vmw_fence_action *action) | |
902 | { | |
903 | struct vmw_fence_manager *fman = fence->fman; | |
904 | unsigned long irq_flags; | |
905 | bool run_update = false; | |
906 | ||
907 | mutex_lock(&fman->goal_irq_mutex); | |
908 | spin_lock_irqsave(&fman->lock, irq_flags); | |
909 | ||
910 | fman->pending_actions[action->type]++; | |
911 | if (fence->signaled & DRM_VMW_FENCE_FLAG_EXEC) { | |
912 | struct list_head action_list; | |
913 | ||
914 | INIT_LIST_HEAD(&action_list); | |
915 | list_add_tail(&action->head, &action_list); | |
916 | vmw_fences_perform_actions(fman, &action_list); | |
917 | } else { | |
918 | list_add_tail(&action->head, &fence->seq_passed_actions); | |
919 | ||
920 | /* | |
921 | * This function may set fman::seqno_valid, so it must | |
922 | * be run with the goal_irq_mutex held. | |
923 | */ | |
924 | run_update = vmw_fence_goal_check_locked(fence); | |
925 | } | |
926 | ||
927 | spin_unlock_irqrestore(&fman->lock, irq_flags); | |
928 | ||
929 | if (run_update) { | |
930 | if (!fman->goal_irq_on) { | |
931 | fman->goal_irq_on = true; | |
932 | vmw_goal_waiter_add(fman->dev_priv); | |
933 | } | |
934 | vmw_fences_update(fman); | |
935 | } | |
936 | mutex_unlock(&fman->goal_irq_mutex); | |
937 | ||
938 | } | |
939 | ||
940 | /** | |
941 | * vmw_event_fence_action_create - Post an event for sending when a fence | |
942 | * object seqno has passed. | |
943 | * | |
944 | * @file_priv: The file connection on which the event should be posted. | |
945 | * @fence: The fence object on which to post the event. | |
946 | * @event: Event to be posted. This event should've been alloced | |
947 | * using k[mz]alloc, and should've been completely initialized. | |
948 | * @interruptible: Interruptible waits if possible. | |
949 | * | |
950 | * As a side effect, the object pointed to by @event may have been | |
951 | * freed when this function returns. If this function returns with | |
952 | * an error code, the caller needs to free that object. | |
953 | */ | |
954 | ||
8b7de6aa JB |
955 | int vmw_event_fence_action_queue(struct drm_file *file_priv, |
956 | struct vmw_fence_obj *fence, | |
957 | struct drm_pending_event *event, | |
958 | uint32_t *tv_sec, | |
959 | uint32_t *tv_usec, | |
960 | bool interruptible) | |
57c5ee79 | 961 | { |
0c5d3703 | 962 | struct vmw_event_fence_action *eaction; |
57c5ee79 | 963 | struct vmw_fence_manager *fman = fence->fman; |
6b82ef50 TH |
964 | struct vmw_fpriv *vmw_fp = vmw_fpriv(file_priv); |
965 | unsigned long irq_flags; | |
57c5ee79 TH |
966 | |
967 | eaction = kzalloc(sizeof(*eaction), GFP_KERNEL); | |
8b7de6aa | 968 | if (unlikely(eaction == NULL)) |
57c5ee79 | 969 | return -ENOMEM; |
57c5ee79 | 970 | |
8b7de6aa | 971 | eaction->event = event; |
57c5ee79 TH |
972 | |
973 | eaction->action.seq_passed = vmw_event_fence_action_seq_passed; | |
974 | eaction->action.cleanup = vmw_event_fence_action_cleanup; | |
975 | eaction->action.type = VMW_ACTION_EVENT; | |
976 | ||
977 | eaction->fence = vmw_fence_obj_reference(fence); | |
978 | eaction->dev = fman->dev_priv->dev; | |
57c5ee79 TH |
979 | eaction->tv_sec = tv_sec; |
980 | eaction->tv_usec = tv_usec; | |
981 | ||
6b82ef50 TH |
982 | spin_lock_irqsave(&fman->lock, irq_flags); |
983 | list_add_tail(&eaction->fpriv_head, &vmw_fp->fence_events); | |
984 | spin_unlock_irqrestore(&fman->lock, irq_flags); | |
985 | ||
57c5ee79 TH |
986 | vmw_fence_obj_add_action(fence, &eaction->action); |
987 | ||
988 | return 0; | |
989 | } | |
990 | ||
8b7de6aa JB |
991 | struct vmw_event_fence_pending { |
992 | struct drm_pending_event base; | |
993 | struct drm_vmw_event_fence event; | |
994 | }; | |
995 | ||
996 | int vmw_event_fence_action_create(struct drm_file *file_priv, | |
997 | struct vmw_fence_obj *fence, | |
998 | uint32_t flags, | |
999 | uint64_t user_data, | |
1000 | bool interruptible) | |
1001 | { | |
1002 | struct vmw_event_fence_pending *event; | |
1003 | struct drm_device *dev = fence->fman->dev_priv->dev; | |
1004 | unsigned long irq_flags; | |
1005 | int ret; | |
1006 | ||
1007 | spin_lock_irqsave(&dev->event_lock, irq_flags); | |
1008 | ||
1009 | ret = (file_priv->event_space < sizeof(event->event)) ? -EBUSY : 0; | |
1010 | if (likely(ret == 0)) | |
1011 | file_priv->event_space -= sizeof(event->event); | |
1012 | ||
1013 | spin_unlock_irqrestore(&dev->event_lock, irq_flags); | |
1014 | ||
1015 | if (unlikely(ret != 0)) { | |
1016 | DRM_ERROR("Failed to allocate event space for this file.\n"); | |
1017 | goto out_no_space; | |
1018 | } | |
1019 | ||
1020 | ||
68c4fce7 | 1021 | event = kzalloc(sizeof(*event), GFP_KERNEL); |
8b7de6aa JB |
1022 | if (unlikely(event == NULL)) { |
1023 | DRM_ERROR("Failed to allocate an event.\n"); | |
1024 | ret = -ENOMEM; | |
1025 | goto out_no_event; | |
1026 | } | |
1027 | ||
1028 | event->event.base.type = DRM_VMW_EVENT_FENCE_SIGNALED; | |
1029 | event->event.base.length = sizeof(*event); | |
1030 | event->event.user_data = user_data; | |
1031 | ||
1032 | event->base.event = &event->event.base; | |
1033 | event->base.file_priv = file_priv; | |
1034 | event->base.destroy = (void (*) (struct drm_pending_event *)) kfree; | |
1035 | ||
1036 | ||
1037 | if (flags & DRM_VMW_FE_FLAG_REQ_TIME) | |
1038 | ret = vmw_event_fence_action_queue(file_priv, fence, | |
1039 | &event->base, | |
1040 | &event->event.tv_sec, | |
1041 | &event->event.tv_usec, | |
1042 | interruptible); | |
1043 | else | |
1044 | ret = vmw_event_fence_action_queue(file_priv, fence, | |
1045 | &event->base, | |
1046 | NULL, | |
1047 | NULL, | |
1048 | interruptible); | |
1049 | if (ret != 0) | |
1050 | goto out_no_queue; | |
1051 | ||
1052 | out_no_queue: | |
1053 | event->base.destroy(&event->base); | |
1054 | out_no_event: | |
1055 | spin_lock_irqsave(&dev->event_lock, irq_flags); | |
1056 | file_priv->event_space += sizeof(*event); | |
1057 | spin_unlock_irqrestore(&dev->event_lock, irq_flags); | |
1058 | out_no_space: | |
1059 | return ret; | |
1060 | } | |
1061 | ||
57c5ee79 TH |
1062 | int vmw_fence_event_ioctl(struct drm_device *dev, void *data, |
1063 | struct drm_file *file_priv) | |
1064 | { | |
1065 | struct vmw_private *dev_priv = vmw_priv(dev); | |
1066 | struct drm_vmw_fence_event_arg *arg = | |
1067 | (struct drm_vmw_fence_event_arg *) data; | |
1068 | struct vmw_fence_obj *fence = NULL; | |
1069 | struct vmw_fpriv *vmw_fp = vmw_fpriv(file_priv); | |
1070 | struct drm_vmw_fence_rep __user *user_fence_rep = | |
1071 | (struct drm_vmw_fence_rep __user *)(unsigned long) | |
1072 | arg->fence_rep; | |
1073 | uint32_t handle; | |
57c5ee79 TH |
1074 | int ret; |
1075 | ||
1076 | /* | |
1077 | * Look up an existing fence object, | |
1078 | * and if user-space wants a new reference, | |
1079 | * add one. | |
1080 | */ | |
1081 | if (arg->handle) { | |
1082 | struct ttm_base_object *base = | |
1083 | ttm_base_object_lookup(vmw_fp->tfile, arg->handle); | |
1084 | ||
1085 | if (unlikely(base == NULL)) { | |
1086 | DRM_ERROR("Fence event invalid fence object handle " | |
1087 | "0x%08lx.\n", | |
1088 | (unsigned long)arg->handle); | |
1089 | return -EINVAL; | |
1090 | } | |
1091 | fence = &(container_of(base, struct vmw_user_fence, | |
1092 | base)->fence); | |
1093 | (void) vmw_fence_obj_reference(fence); | |
1094 | ||
1095 | if (user_fence_rep != NULL) { | |
1096 | bool existed; | |
1097 | ||
1098 | ret = ttm_ref_object_add(vmw_fp->tfile, base, | |
1099 | TTM_REF_USAGE, &existed); | |
1100 | if (unlikely(ret != 0)) { | |
1101 | DRM_ERROR("Failed to reference a fence " | |
1102 | "object.\n"); | |
1103 | goto out_no_ref_obj; | |
1104 | } | |
1105 | handle = base->hash.key; | |
1106 | } | |
1107 | ttm_base_object_unref(&base); | |
1108 | } | |
1109 | ||
1110 | /* | |
1111 | * Create a new fence object. | |
1112 | */ | |
1113 | if (!fence) { | |
1114 | ret = vmw_execbuf_fence_commands(file_priv, dev_priv, | |
1115 | &fence, | |
1116 | (user_fence_rep) ? | |
1117 | &handle : NULL); | |
1118 | if (unlikely(ret != 0)) { | |
1119 | DRM_ERROR("Fence event failed to create fence.\n"); | |
1120 | return ret; | |
1121 | } | |
1122 | } | |
1123 | ||
1124 | BUG_ON(fence == NULL); | |
1125 | ||
57c5ee79 TH |
1126 | if (arg->flags & DRM_VMW_FE_FLAG_REQ_TIME) |
1127 | ret = vmw_event_fence_action_create(file_priv, fence, | |
8b7de6aa JB |
1128 | arg->flags, |
1129 | arg->user_data, | |
57c5ee79 TH |
1130 | true); |
1131 | else | |
1132 | ret = vmw_event_fence_action_create(file_priv, fence, | |
8b7de6aa JB |
1133 | arg->flags, |
1134 | arg->user_data, | |
57c5ee79 TH |
1135 | true); |
1136 | ||
1137 | if (unlikely(ret != 0)) { | |
1138 | if (ret != -ERESTARTSYS) | |
1139 | DRM_ERROR("Failed to attach event to fence.\n"); | |
8b7de6aa | 1140 | goto out_no_create; |
57c5ee79 TH |
1141 | } |
1142 | ||
1143 | vmw_execbuf_copy_fence_user(dev_priv, vmw_fp, 0, user_fence_rep, fence, | |
1144 | handle); | |
1145 | vmw_fence_obj_unreference(&fence); | |
1146 | return 0; | |
8b7de6aa | 1147 | out_no_create: |
57c5ee79 TH |
1148 | if (user_fence_rep != NULL) |
1149 | ttm_ref_object_base_unref(vmw_fpriv(file_priv)->tfile, | |
1150 | handle, TTM_REF_USAGE); | |
1151 | out_no_ref_obj: | |
1152 | vmw_fence_obj_unreference(&fence); | |
1153 | return ret; | |
1154 | } |