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28#include <drm/drmP.h>
29#include "vmwgfx_drv.h"
30
31#define VMW_FENCE_WRAP (1 << 31)
32
33struct vmw_fence_manager {
34 int num_fence_objects;
35 struct vmw_private *dev_priv;
36 spinlock_t lock;
37 struct list_head fence_list;
38 struct work_struct work;
39 u32 user_fence_size;
40 u32 fence_size;
41 u32 event_fence_action_size;
42 bool fifo_down;
43 struct list_head cleanup_list;
44 uint32_t pending_actions[VMW_ACTION_MAX];
45 struct mutex goal_irq_mutex;
46 bool goal_irq_on;
47 bool seqno_valid;
48
49 unsigned ctx;
50};
51
52struct vmw_user_fence {
53 struct ttm_base_object base;
54 struct vmw_fence_obj fence;
55};
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72struct vmw_event_fence_action {
73 struct vmw_fence_action action;
74 struct list_head fpriv_head;
75
76 struct drm_pending_event *event;
77 struct vmw_fence_obj *fence;
78 struct drm_device *dev;
79
80 uint32_t *tv_sec;
81 uint32_t *tv_usec;
82};
83
84static struct vmw_fence_manager *
85fman_from_fence(struct vmw_fence_obj *fence)
86{
87 return container_of(fence->base.lock, struct vmw_fence_manager, lock);
88}
89
90
91
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110
111
112static void vmw_fence_obj_destroy(struct fence *f)
113{
114 struct vmw_fence_obj *fence =
115 container_of(f, struct vmw_fence_obj, base);
116
117 struct vmw_fence_manager *fman = fman_from_fence(fence);
118 unsigned long irq_flags;
119
120 spin_lock_irqsave(&fman->lock, irq_flags);
121 list_del_init(&fence->head);
122 --fman->num_fence_objects;
123 spin_unlock_irqrestore(&fman->lock, irq_flags);
124 fence->destroy(fence);
125}
126
127static const char *vmw_fence_get_driver_name(struct fence *f)
128{
129 return "vmwgfx";
130}
131
132static const char *vmw_fence_get_timeline_name(struct fence *f)
133{
134 return "svga";
135}
136
137static bool vmw_fence_enable_signaling(struct fence *f)
138{
139 struct vmw_fence_obj *fence =
140 container_of(f, struct vmw_fence_obj, base);
141
142 struct vmw_fence_manager *fman = fman_from_fence(fence);
143 struct vmw_private *dev_priv = fman->dev_priv;
144
145 u32 *fifo_mem = dev_priv->mmio_virt;
146 u32 seqno = vmw_mmio_read(fifo_mem + SVGA_FIFO_FENCE);
147 if (seqno - fence->base.seqno < VMW_FENCE_WRAP)
148 return false;
149
150 vmw_fifo_ping_host(dev_priv, SVGA_SYNC_GENERIC);
151
152 return true;
153}
154
155struct vmwgfx_wait_cb {
156 struct fence_cb base;
157 struct task_struct *task;
158};
159
160static void
161vmwgfx_wait_cb(struct fence *fence, struct fence_cb *cb)
162{
163 struct vmwgfx_wait_cb *wait =
164 container_of(cb, struct vmwgfx_wait_cb, base);
165
166 wake_up_process(wait->task);
167}
168
169static void __vmw_fences_update(struct vmw_fence_manager *fman);
170
171static long vmw_fence_wait(struct fence *f, bool intr, signed long timeout)
172{
173 struct vmw_fence_obj *fence =
174 container_of(f, struct vmw_fence_obj, base);
175
176 struct vmw_fence_manager *fman = fman_from_fence(fence);
177 struct vmw_private *dev_priv = fman->dev_priv;
178 struct vmwgfx_wait_cb cb;
179 long ret = timeout;
180 unsigned long irq_flags;
181
182 if (likely(vmw_fence_obj_signaled(fence)))
183 return timeout;
184
185 vmw_fifo_ping_host(dev_priv, SVGA_SYNC_GENERIC);
186 vmw_seqno_waiter_add(dev_priv);
187
188 spin_lock_irqsave(f->lock, irq_flags);
189
190 if (intr && signal_pending(current)) {
191 ret = -ERESTARTSYS;
192 goto out;
193 }
194
195 cb.base.func = vmwgfx_wait_cb;
196 cb.task = current;
197 list_add(&cb.base.node, &f->cb_list);
198
199 while (ret > 0) {
200 __vmw_fences_update(fman);
201 if (test_bit(FENCE_FLAG_SIGNALED_BIT, &f->flags))
202 break;
203
204 if (intr)
205 __set_current_state(TASK_INTERRUPTIBLE);
206 else
207 __set_current_state(TASK_UNINTERRUPTIBLE);
208 spin_unlock_irqrestore(f->lock, irq_flags);
209
210 ret = schedule_timeout(ret);
211
212 spin_lock_irqsave(f->lock, irq_flags);
213 if (ret > 0 && intr && signal_pending(current))
214 ret = -ERESTARTSYS;
215 }
216
217 if (!list_empty(&cb.base.node))
218 list_del(&cb.base.node);
219 __set_current_state(TASK_RUNNING);
220
221out:
222 spin_unlock_irqrestore(f->lock, irq_flags);
223
224 vmw_seqno_waiter_remove(dev_priv);
225
226 return ret;
227}
228
229static struct fence_ops vmw_fence_ops = {
230 .get_driver_name = vmw_fence_get_driver_name,
231 .get_timeline_name = vmw_fence_get_timeline_name,
232 .enable_signaling = vmw_fence_enable_signaling,
233 .wait = vmw_fence_wait,
234 .release = vmw_fence_obj_destroy,
235};
236
237
238
239
240
241
242
243
244static void vmw_fence_work_func(struct work_struct *work)
245{
246 struct vmw_fence_manager *fman =
247 container_of(work, struct vmw_fence_manager, work);
248 struct list_head list;
249 struct vmw_fence_action *action, *next_action;
250 bool seqno_valid;
251
252 do {
253 INIT_LIST_HEAD(&list);
254 mutex_lock(&fman->goal_irq_mutex);
255
256 spin_lock_irq(&fman->lock);
257 list_splice_init(&fman->cleanup_list, &list);
258 seqno_valid = fman->seqno_valid;
259 spin_unlock_irq(&fman->lock);
260
261 if (!seqno_valid && fman->goal_irq_on) {
262 fman->goal_irq_on = false;
263 vmw_goal_waiter_remove(fman->dev_priv);
264 }
265 mutex_unlock(&fman->goal_irq_mutex);
266
267 if (list_empty(&list))
268 return;
269
270
271
272
273
274
275
276 list_for_each_entry_safe(action, next_action, &list, head) {
277 list_del_init(&action->head);
278 if (action->cleanup)
279 action->cleanup(action);
280 }
281 } while (1);
282}
283
284struct vmw_fence_manager *vmw_fence_manager_init(struct vmw_private *dev_priv)
285{
286 struct vmw_fence_manager *fman = kzalloc(sizeof(*fman), GFP_KERNEL);
287
288 if (unlikely(fman == NULL))
289 return NULL;
290
291 fman->dev_priv = dev_priv;
292 spin_lock_init(&fman->lock);
293 INIT_LIST_HEAD(&fman->fence_list);
294 INIT_LIST_HEAD(&fman->cleanup_list);
295 INIT_WORK(&fman->work, &vmw_fence_work_func);
296 fman->fifo_down = true;
297 fman->user_fence_size = ttm_round_pot(sizeof(struct vmw_user_fence));
298 fman->fence_size = ttm_round_pot(sizeof(struct vmw_fence_obj));
299 fman->event_fence_action_size =
300 ttm_round_pot(sizeof(struct vmw_event_fence_action));
301 mutex_init(&fman->goal_irq_mutex);
302 fman->ctx = fence_context_alloc(1);
303
304 return fman;
305}
306
307void vmw_fence_manager_takedown(struct vmw_fence_manager *fman)
308{
309 unsigned long irq_flags;
310 bool lists_empty;
311
312 (void) cancel_work_sync(&fman->work);
313
314 spin_lock_irqsave(&fman->lock, irq_flags);
315 lists_empty = list_empty(&fman->fence_list) &&
316 list_empty(&fman->cleanup_list);
317 spin_unlock_irqrestore(&fman->lock, irq_flags);
318
319 BUG_ON(!lists_empty);
320 kfree(fman);
321}
322
323static int vmw_fence_obj_init(struct vmw_fence_manager *fman,
324 struct vmw_fence_obj *fence, u32 seqno,
325 void (*destroy) (struct vmw_fence_obj *fence))
326{
327 unsigned long irq_flags;
328 int ret = 0;
329
330 fence_init(&fence->base, &vmw_fence_ops, &fman->lock,
331 fman->ctx, seqno);
332 INIT_LIST_HEAD(&fence->seq_passed_actions);
333 fence->destroy = destroy;
334
335 spin_lock_irqsave(&fman->lock, irq_flags);
336 if (unlikely(fman->fifo_down)) {
337 ret = -EBUSY;
338 goto out_unlock;
339 }
340 list_add_tail(&fence->head, &fman->fence_list);
341 ++fman->num_fence_objects;
342
343out_unlock:
344 spin_unlock_irqrestore(&fman->lock, irq_flags);
345 return ret;
346
347}
348
349static void vmw_fences_perform_actions(struct vmw_fence_manager *fman,
350 struct list_head *list)
351{
352 struct vmw_fence_action *action, *next_action;
353
354 list_for_each_entry_safe(action, next_action, list, head) {
355 list_del_init(&action->head);
356 fman->pending_actions[action->type]--;
357 if (action->seq_passed != NULL)
358 action->seq_passed(action);
359
360
361
362
363
364
365 list_add_tail(&action->head, &fman->cleanup_list);
366 }
367}
368
369
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373
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375
376
377
378
379
380
381
382
383
384
385static bool vmw_fence_goal_new_locked(struct vmw_fence_manager *fman,
386 u32 passed_seqno)
387{
388 u32 goal_seqno;
389 u32 *fifo_mem;
390 struct vmw_fence_obj *fence;
391
392 if (likely(!fman->seqno_valid))
393 return false;
394
395 fifo_mem = fman->dev_priv->mmio_virt;
396 goal_seqno = vmw_mmio_read(fifo_mem + SVGA_FIFO_FENCE_GOAL);
397 if (likely(passed_seqno - goal_seqno >= VMW_FENCE_WRAP))
398 return false;
399
400 fman->seqno_valid = false;
401 list_for_each_entry(fence, &fman->fence_list, head) {
402 if (!list_empty(&fence->seq_passed_actions)) {
403 fman->seqno_valid = true;
404 vmw_mmio_write(fence->base.seqno,
405 fifo_mem + SVGA_FIFO_FENCE_GOAL);
406 break;
407 }
408 }
409
410 return true;
411}
412
413
414
415
416
417
418
419
420
421
422
423
424
425
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427
428
429static bool vmw_fence_goal_check_locked(struct vmw_fence_obj *fence)
430{
431 struct vmw_fence_manager *fman = fman_from_fence(fence);
432 u32 goal_seqno;
433 u32 *fifo_mem;
434
435 if (fence_is_signaled_locked(&fence->base))
436 return false;
437
438 fifo_mem = fman->dev_priv->mmio_virt;
439 goal_seqno = vmw_mmio_read(fifo_mem + SVGA_FIFO_FENCE_GOAL);
440 if (likely(fman->seqno_valid &&
441 goal_seqno - fence->base.seqno < VMW_FENCE_WRAP))
442 return false;
443
444 vmw_mmio_write(fence->base.seqno, fifo_mem + SVGA_FIFO_FENCE_GOAL);
445 fman->seqno_valid = true;
446
447 return true;
448}
449
450static void __vmw_fences_update(struct vmw_fence_manager *fman)
451{
452 struct vmw_fence_obj *fence, *next_fence;
453 struct list_head action_list;
454 bool needs_rerun;
455 uint32_t seqno, new_seqno;
456 u32 *fifo_mem = fman->dev_priv->mmio_virt;
457
458 seqno = vmw_mmio_read(fifo_mem + SVGA_FIFO_FENCE);
459rerun:
460 list_for_each_entry_safe(fence, next_fence, &fman->fence_list, head) {
461 if (seqno - fence->base.seqno < VMW_FENCE_WRAP) {
462 list_del_init(&fence->head);
463 fence_signal_locked(&fence->base);
464 INIT_LIST_HEAD(&action_list);
465 list_splice_init(&fence->seq_passed_actions,
466 &action_list);
467 vmw_fences_perform_actions(fman, &action_list);
468 } else
469 break;
470 }
471
472
473
474
475
476
477
478 needs_rerun = vmw_fence_goal_new_locked(fman, seqno);
479 if (unlikely(needs_rerun)) {
480 new_seqno = vmw_mmio_read(fifo_mem + SVGA_FIFO_FENCE);
481 if (new_seqno != seqno) {
482 seqno = new_seqno;
483 goto rerun;
484 }
485 }
486
487 if (!list_empty(&fman->cleanup_list))
488 (void) schedule_work(&fman->work);
489}
490
491void vmw_fences_update(struct vmw_fence_manager *fman)
492{
493 unsigned long irq_flags;
494
495 spin_lock_irqsave(&fman->lock, irq_flags);
496 __vmw_fences_update(fman);
497 spin_unlock_irqrestore(&fman->lock, irq_flags);
498}
499
500bool vmw_fence_obj_signaled(struct vmw_fence_obj *fence)
501{
502 struct vmw_fence_manager *fman = fman_from_fence(fence);
503
504 if (test_bit(FENCE_FLAG_SIGNALED_BIT, &fence->base.flags))
505 return 1;
506
507 vmw_fences_update(fman);
508
509 return fence_is_signaled(&fence->base);
510}
511
512int vmw_fence_obj_wait(struct vmw_fence_obj *fence, bool lazy,
513 bool interruptible, unsigned long timeout)
514{
515 long ret = fence_wait_timeout(&fence->base, interruptible, timeout);
516
517 if (likely(ret > 0))
518 return 0;
519 else if (ret == 0)
520 return -EBUSY;
521 else
522 return ret;
523}
524
525void vmw_fence_obj_flush(struct vmw_fence_obj *fence)
526{
527 struct vmw_private *dev_priv = fman_from_fence(fence)->dev_priv;
528
529 vmw_fifo_ping_host(dev_priv, SVGA_SYNC_GENERIC);
530}
531
532static void vmw_fence_destroy(struct vmw_fence_obj *fence)
533{
534 fence_free(&fence->base);
535}
536
537int vmw_fence_create(struct vmw_fence_manager *fman,
538 uint32_t seqno,
539 struct vmw_fence_obj **p_fence)
540{
541 struct vmw_fence_obj *fence;
542 int ret;
543
544 fence = kzalloc(sizeof(*fence), GFP_KERNEL);
545 if (unlikely(fence == NULL))
546 return -ENOMEM;
547
548 ret = vmw_fence_obj_init(fman, fence, seqno,
549 vmw_fence_destroy);
550 if (unlikely(ret != 0))
551 goto out_err_init;
552
553 *p_fence = fence;
554 return 0;
555
556out_err_init:
557 kfree(fence);
558 return ret;
559}
560
561
562static void vmw_user_fence_destroy(struct vmw_fence_obj *fence)
563{
564 struct vmw_user_fence *ufence =
565 container_of(fence, struct vmw_user_fence, fence);
566 struct vmw_fence_manager *fman = fman_from_fence(fence);
567
568 ttm_base_object_kfree(ufence, base);
569
570
571
572 ttm_mem_global_free(vmw_mem_glob(fman->dev_priv),
573 fman->user_fence_size);
574}
575
576static void vmw_user_fence_base_release(struct ttm_base_object **p_base)
577{
578 struct ttm_base_object *base = *p_base;
579 struct vmw_user_fence *ufence =
580 container_of(base, struct vmw_user_fence, base);
581 struct vmw_fence_obj *fence = &ufence->fence;
582
583 *p_base = NULL;
584 vmw_fence_obj_unreference(&fence);
585}
586
587int vmw_user_fence_create(struct drm_file *file_priv,
588 struct vmw_fence_manager *fman,
589 uint32_t seqno,
590 struct vmw_fence_obj **p_fence,
591 uint32_t *p_handle)
592{
593 struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
594 struct vmw_user_fence *ufence;
595 struct vmw_fence_obj *tmp;
596 struct ttm_mem_global *mem_glob = vmw_mem_glob(fman->dev_priv);
597 int ret;
598
599
600
601
602
603
604 ret = ttm_mem_global_alloc(mem_glob, fman->user_fence_size,
605 false, false);
606 if (unlikely(ret != 0))
607 return ret;
608
609 ufence = kzalloc(sizeof(*ufence), GFP_KERNEL);
610 if (unlikely(ufence == NULL)) {
611 ret = -ENOMEM;
612 goto out_no_object;
613 }
614
615 ret = vmw_fence_obj_init(fman, &ufence->fence, seqno,
616 vmw_user_fence_destroy);
617 if (unlikely(ret != 0)) {
618 kfree(ufence);
619 goto out_no_object;
620 }
621
622
623
624
625
626 tmp = vmw_fence_obj_reference(&ufence->fence);
627 ret = ttm_base_object_init(tfile, &ufence->base, false,
628 VMW_RES_FENCE,
629 &vmw_user_fence_base_release, NULL);
630
631
632 if (unlikely(ret != 0)) {
633
634
635
636 vmw_fence_obj_unreference(&tmp);
637 goto out_err;
638 }
639
640 *p_fence = &ufence->fence;
641 *p_handle = ufence->base.hash.key;
642
643 return 0;
644out_err:
645 tmp = &ufence->fence;
646 vmw_fence_obj_unreference(&tmp);
647out_no_object:
648 ttm_mem_global_free(mem_glob, fman->user_fence_size);
649 return ret;
650}
651
652
653
654
655
656
657void vmw_fence_fifo_down(struct vmw_fence_manager *fman)
658{
659 struct list_head action_list;
660 int ret;
661
662
663
664
665
666
667 spin_lock_irq(&fman->lock);
668 fman->fifo_down = true;
669 while (!list_empty(&fman->fence_list)) {
670 struct vmw_fence_obj *fence =
671 list_entry(fman->fence_list.prev, struct vmw_fence_obj,
672 head);
673 fence_get(&fence->base);
674 spin_unlock_irq(&fman->lock);
675
676 ret = vmw_fence_obj_wait(fence, false, false,
677 VMW_FENCE_WAIT_TIMEOUT);
678
679 if (unlikely(ret != 0)) {
680 list_del_init(&fence->head);
681 fence_signal(&fence->base);
682 INIT_LIST_HEAD(&action_list);
683 list_splice_init(&fence->seq_passed_actions,
684 &action_list);
685 vmw_fences_perform_actions(fman, &action_list);
686 }
687
688 BUG_ON(!list_empty(&fence->head));
689 fence_put(&fence->base);
690 spin_lock_irq(&fman->lock);
691 }
692 spin_unlock_irq(&fman->lock);
693}
694
695void vmw_fence_fifo_up(struct vmw_fence_manager *fman)
696{
697 unsigned long irq_flags;
698
699 spin_lock_irqsave(&fman->lock, irq_flags);
700 fman->fifo_down = false;
701 spin_unlock_irqrestore(&fman->lock, irq_flags);
702}
703
704
705int vmw_fence_obj_wait_ioctl(struct drm_device *dev, void *data,
706 struct drm_file *file_priv)
707{
708 struct drm_vmw_fence_wait_arg *arg =
709 (struct drm_vmw_fence_wait_arg *)data;
710 unsigned long timeout;
711 struct ttm_base_object *base;
712 struct vmw_fence_obj *fence;
713 struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
714 int ret;
715 uint64_t wait_timeout = ((uint64_t)arg->timeout_us * HZ);
716
717
718
719
720
721
722 wait_timeout = (wait_timeout >> 20) + (wait_timeout >> 24) -
723 (wait_timeout >> 26);
724
725 if (!arg->cookie_valid) {
726 arg->cookie_valid = 1;
727 arg->kernel_cookie = jiffies + wait_timeout;
728 }
729
730 base = ttm_base_object_lookup(tfile, arg->handle);
731 if (unlikely(base == NULL)) {
732 printk(KERN_ERR "Wait invalid fence object handle "
733 "0x%08lx.\n",
734 (unsigned long)arg->handle);
735 return -EINVAL;
736 }
737
738 fence = &(container_of(base, struct vmw_user_fence, base)->fence);
739
740 timeout = jiffies;
741 if (time_after_eq(timeout, (unsigned long)arg->kernel_cookie)) {
742 ret = ((vmw_fence_obj_signaled(fence)) ?
743 0 : -EBUSY);
744 goto out;
745 }
746
747 timeout = (unsigned long)arg->kernel_cookie - timeout;
748
749 ret = vmw_fence_obj_wait(fence, arg->lazy, true, timeout);
750
751out:
752 ttm_base_object_unref(&base);
753
754
755
756
757
758 if (ret == 0 && (arg->wait_options & DRM_VMW_WAIT_OPTION_UNREF))
759 return ttm_ref_object_base_unref(tfile, arg->handle,
760 TTM_REF_USAGE);
761 return ret;
762}
763
764int vmw_fence_obj_signaled_ioctl(struct drm_device *dev, void *data,
765 struct drm_file *file_priv)
766{
767 struct drm_vmw_fence_signaled_arg *arg =
768 (struct drm_vmw_fence_signaled_arg *) data;
769 struct ttm_base_object *base;
770 struct vmw_fence_obj *fence;
771 struct vmw_fence_manager *fman;
772 struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
773 struct vmw_private *dev_priv = vmw_priv(dev);
774
775 base = ttm_base_object_lookup(tfile, arg->handle);
776 if (unlikely(base == NULL)) {
777 printk(KERN_ERR "Fence signaled invalid fence object handle "
778 "0x%08lx.\n",
779 (unsigned long)arg->handle);
780 return -EINVAL;
781 }
782
783 fence = &(container_of(base, struct vmw_user_fence, base)->fence);
784 fman = fman_from_fence(fence);
785
786 arg->signaled = vmw_fence_obj_signaled(fence);
787
788 arg->signaled_flags = arg->flags;
789 spin_lock_irq(&fman->lock);
790 arg->passed_seqno = dev_priv->last_read_seqno;
791 spin_unlock_irq(&fman->lock);
792
793 ttm_base_object_unref(&base);
794
795 return 0;
796}
797
798
799int vmw_fence_obj_unref_ioctl(struct drm_device *dev, void *data,
800 struct drm_file *file_priv)
801{
802 struct drm_vmw_fence_arg *arg =
803 (struct drm_vmw_fence_arg *) data;
804
805 return ttm_ref_object_base_unref(vmw_fpriv(file_priv)->tfile,
806 arg->handle,
807 TTM_REF_USAGE);
808}
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823void vmw_event_fence_fpriv_gone(struct vmw_fence_manager *fman,
824 struct list_head *event_list)
825{
826 struct vmw_event_fence_action *eaction;
827 struct drm_pending_event *event;
828 unsigned long irq_flags;
829
830 while (1) {
831 spin_lock_irqsave(&fman->lock, irq_flags);
832 if (list_empty(event_list))
833 goto out_unlock;
834 eaction = list_first_entry(event_list,
835 struct vmw_event_fence_action,
836 fpriv_head);
837 list_del_init(&eaction->fpriv_head);
838 event = eaction->event;
839 eaction->event = NULL;
840 spin_unlock_irqrestore(&fman->lock, irq_flags);
841 event->destroy(event);
842 }
843out_unlock:
844 spin_unlock_irqrestore(&fman->lock, irq_flags);
845}
846
847
848
849
850
851
852
853
854
855
856
857
858
859static void vmw_event_fence_action_seq_passed(struct vmw_fence_action *action)
860{
861 struct vmw_event_fence_action *eaction =
862 container_of(action, struct vmw_event_fence_action, action);
863 struct drm_device *dev = eaction->dev;
864 struct drm_pending_event *event = eaction->event;
865 struct drm_file *file_priv;
866 unsigned long irq_flags;
867
868 if (unlikely(event == NULL))
869 return;
870
871 file_priv = event->file_priv;
872 spin_lock_irqsave(&dev->event_lock, irq_flags);
873
874 if (likely(eaction->tv_sec != NULL)) {
875 struct timeval tv;
876
877 do_gettimeofday(&tv);
878 *eaction->tv_sec = tv.tv_sec;
879 *eaction->tv_usec = tv.tv_usec;
880 }
881
882 list_del_init(&eaction->fpriv_head);
883 list_add_tail(&eaction->event->link, &file_priv->event_list);
884 eaction->event = NULL;
885 wake_up_all(&file_priv->event_wait);
886 spin_unlock_irqrestore(&dev->event_lock, irq_flags);
887}
888
889
890
891
892
893
894
895
896
897
898static void vmw_event_fence_action_cleanup(struct vmw_fence_action *action)
899{
900 struct vmw_event_fence_action *eaction =
901 container_of(action, struct vmw_event_fence_action, action);
902 struct vmw_fence_manager *fman = fman_from_fence(eaction->fence);
903 unsigned long irq_flags;
904
905 spin_lock_irqsave(&fman->lock, irq_flags);
906 list_del(&eaction->fpriv_head);
907 spin_unlock_irqrestore(&fman->lock, irq_flags);
908
909 vmw_fence_obj_unreference(&eaction->fence);
910 kfree(eaction);
911}
912
913
914
915
916
917
918
919
920
921
922
923static void vmw_fence_obj_add_action(struct vmw_fence_obj *fence,
924 struct vmw_fence_action *action)
925{
926 struct vmw_fence_manager *fman = fman_from_fence(fence);
927 unsigned long irq_flags;
928 bool run_update = false;
929
930 mutex_lock(&fman->goal_irq_mutex);
931 spin_lock_irqsave(&fman->lock, irq_flags);
932
933 fman->pending_actions[action->type]++;
934 if (fence_is_signaled_locked(&fence->base)) {
935 struct list_head action_list;
936
937 INIT_LIST_HEAD(&action_list);
938 list_add_tail(&action->head, &action_list);
939 vmw_fences_perform_actions(fman, &action_list);
940 } else {
941 list_add_tail(&action->head, &fence->seq_passed_actions);
942
943
944
945
946
947 run_update = vmw_fence_goal_check_locked(fence);
948 }
949
950 spin_unlock_irqrestore(&fman->lock, irq_flags);
951
952 if (run_update) {
953 if (!fman->goal_irq_on) {
954 fman->goal_irq_on = true;
955 vmw_goal_waiter_add(fman->dev_priv);
956 }
957 vmw_fences_update(fman);
958 }
959 mutex_unlock(&fman->goal_irq_mutex);
960
961}
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978int vmw_event_fence_action_queue(struct drm_file *file_priv,
979 struct vmw_fence_obj *fence,
980 struct drm_pending_event *event,
981 uint32_t *tv_sec,
982 uint32_t *tv_usec,
983 bool interruptible)
984{
985 struct vmw_event_fence_action *eaction;
986 struct vmw_fence_manager *fman = fman_from_fence(fence);
987 struct vmw_fpriv *vmw_fp = vmw_fpriv(file_priv);
988 unsigned long irq_flags;
989
990 eaction = kzalloc(sizeof(*eaction), GFP_KERNEL);
991 if (unlikely(eaction == NULL))
992 return -ENOMEM;
993
994 eaction->event = event;
995
996 eaction->action.seq_passed = vmw_event_fence_action_seq_passed;
997 eaction->action.cleanup = vmw_event_fence_action_cleanup;
998 eaction->action.type = VMW_ACTION_EVENT;
999
1000 eaction->fence = vmw_fence_obj_reference(fence);
1001 eaction->dev = fman->dev_priv->dev;
1002 eaction->tv_sec = tv_sec;
1003 eaction->tv_usec = tv_usec;
1004
1005 spin_lock_irqsave(&fman->lock, irq_flags);
1006 list_add_tail(&eaction->fpriv_head, &vmw_fp->fence_events);
1007 spin_unlock_irqrestore(&fman->lock, irq_flags);
1008
1009 vmw_fence_obj_add_action(fence, &eaction->action);
1010
1011 return 0;
1012}
1013
1014struct vmw_event_fence_pending {
1015 struct drm_pending_event base;
1016 struct drm_vmw_event_fence event;
1017};
1018
1019static int vmw_event_fence_action_create(struct drm_file *file_priv,
1020 struct vmw_fence_obj *fence,
1021 uint32_t flags,
1022 uint64_t user_data,
1023 bool interruptible)
1024{
1025 struct vmw_event_fence_pending *event;
1026 struct vmw_fence_manager *fman = fman_from_fence(fence);
1027 struct drm_device *dev = fman->dev_priv->dev;
1028 unsigned long irq_flags;
1029 int ret;
1030
1031 spin_lock_irqsave(&dev->event_lock, irq_flags);
1032
1033 ret = (file_priv->event_space < sizeof(event->event)) ? -EBUSY : 0;
1034 if (likely(ret == 0))
1035 file_priv->event_space -= sizeof(event->event);
1036
1037 spin_unlock_irqrestore(&dev->event_lock, irq_flags);
1038
1039 if (unlikely(ret != 0)) {
1040 DRM_ERROR("Failed to allocate event space for this file.\n");
1041 goto out_no_space;
1042 }
1043
1044
1045 event = kzalloc(sizeof(*event), GFP_KERNEL);
1046 if (unlikely(event == NULL)) {
1047 DRM_ERROR("Failed to allocate an event.\n");
1048 ret = -ENOMEM;
1049 goto out_no_event;
1050 }
1051
1052 event->event.base.type = DRM_VMW_EVENT_FENCE_SIGNALED;
1053 event->event.base.length = sizeof(*event);
1054 event->event.user_data = user_data;
1055
1056 event->base.event = &event->event.base;
1057 event->base.file_priv = file_priv;
1058 event->base.destroy = (void (*) (struct drm_pending_event *)) kfree;
1059
1060
1061 if (flags & DRM_VMW_FE_FLAG_REQ_TIME)
1062 ret = vmw_event_fence_action_queue(file_priv, fence,
1063 &event->base,
1064 &event->event.tv_sec,
1065 &event->event.tv_usec,
1066 interruptible);
1067 else
1068 ret = vmw_event_fence_action_queue(file_priv, fence,
1069 &event->base,
1070 NULL,
1071 NULL,
1072 interruptible);
1073 if (ret != 0)
1074 goto out_no_queue;
1075
1076 return 0;
1077
1078out_no_queue:
1079 event->base.destroy(&event->base);
1080out_no_event:
1081 spin_lock_irqsave(&dev->event_lock, irq_flags);
1082 file_priv->event_space += sizeof(*event);
1083 spin_unlock_irqrestore(&dev->event_lock, irq_flags);
1084out_no_space:
1085 return ret;
1086}
1087
1088int vmw_fence_event_ioctl(struct drm_device *dev, void *data,
1089 struct drm_file *file_priv)
1090{
1091 struct vmw_private *dev_priv = vmw_priv(dev);
1092 struct drm_vmw_fence_event_arg *arg =
1093 (struct drm_vmw_fence_event_arg *) data;
1094 struct vmw_fence_obj *fence = NULL;
1095 struct vmw_fpriv *vmw_fp = vmw_fpriv(file_priv);
1096 struct drm_vmw_fence_rep __user *user_fence_rep =
1097 (struct drm_vmw_fence_rep __user *)(unsigned long)
1098 arg->fence_rep;
1099 uint32_t handle;
1100 int ret;
1101
1102
1103
1104
1105
1106
1107 if (arg->handle) {
1108 struct ttm_base_object *base =
1109 ttm_base_object_lookup_for_ref(dev_priv->tdev,
1110 arg->handle);
1111
1112 if (unlikely(base == NULL)) {
1113 DRM_ERROR("Fence event invalid fence object handle "
1114 "0x%08lx.\n",
1115 (unsigned long)arg->handle);
1116 return -EINVAL;
1117 }
1118 fence = &(container_of(base, struct vmw_user_fence,
1119 base)->fence);
1120 (void) vmw_fence_obj_reference(fence);
1121
1122 if (user_fence_rep != NULL) {
1123 bool existed;
1124
1125 ret = ttm_ref_object_add(vmw_fp->tfile, base,
1126 TTM_REF_USAGE, &existed);
1127 if (unlikely(ret != 0)) {
1128 DRM_ERROR("Failed to reference a fence "
1129 "object.\n");
1130 goto out_no_ref_obj;
1131 }
1132 handle = base->hash.key;
1133 }
1134 ttm_base_object_unref(&base);
1135 }
1136
1137
1138
1139
1140 if (!fence) {
1141 ret = vmw_execbuf_fence_commands(file_priv, dev_priv,
1142 &fence,
1143 (user_fence_rep) ?
1144 &handle : NULL);
1145 if (unlikely(ret != 0)) {
1146 DRM_ERROR("Fence event failed to create fence.\n");
1147 return ret;
1148 }
1149 }
1150
1151 BUG_ON(fence == NULL);
1152
1153 ret = vmw_event_fence_action_create(file_priv, fence,
1154 arg->flags,
1155 arg->user_data,
1156 true);
1157 if (unlikely(ret != 0)) {
1158 if (ret != -ERESTARTSYS)
1159 DRM_ERROR("Failed to attach event to fence.\n");
1160 goto out_no_create;
1161 }
1162
1163 vmw_execbuf_copy_fence_user(dev_priv, vmw_fp, 0, user_fence_rep, fence,
1164 handle);
1165 vmw_fence_obj_unreference(&fence);
1166 return 0;
1167out_no_create:
1168 if (user_fence_rep != NULL)
1169 ttm_ref_object_base_unref(vmw_fpriv(file_priv)->tfile,
1170 handle, TTM_REF_USAGE);
1171out_no_ref_obj:
1172 vmw_fence_obj_unreference(&fence);
1173 return ret;
1174}
1175