1 /**************************************************************************
3 * Copyright © 2011 VMware, Inc., Palo Alto, CA., USA
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:
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
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.
26 **************************************************************************/
29 #include "vmwgfx_drv.h"
31 #define VMW_FENCE_WRAP (1 << 31)
33 struct vmw_fence_manager {
34 int num_fence_objects;
35 struct vmw_private *dev_priv;
37 struct list_head fence_list;
38 struct work_struct work;
41 u32 event_fence_action_size;
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; /* 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. */
51 struct vmw_user_fence {
52 struct ttm_base_object base;
53 struct vmw_fence_obj fence;
57 * struct vmw_event_fence_action - fence action that delivers a drm event.
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
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.
71 struct vmw_event_fence_action {
72 struct vmw_fence_action action;
74 struct drm_pending_event *event;
75 struct vmw_fence_obj *fence;
76 struct drm_device *dev;
83 * Note on fencing subsystem usage of irqs:
84 * Typically the vmw_fences_update function is called
86 * a) When a new fence seqno has been submitted by the fifo code.
87 * b) On-demand when we have waiters. Sleeping waiters will switch on the
88 * ANY_FENCE irq and call vmw_fences_update function each time an ANY_FENCE
89 * irq is received. When the last fence waiter is gone, that IRQ is masked
92 * In situations where there are no waiters and we don't submit any new fences,
93 * fence objects may not be signaled. This is perfectly OK, since there are
94 * no consumers of the signaled data, but that is NOT ok when there are fence
95 * actions attached to a fence. The fencing subsystem then makes use of the
96 * FENCE_GOAL irq and sets the fence goal seqno to that of the next fence
97 * which has an action attached, and each time vmw_fences_update is called,
98 * the subsystem makes sure the fence goal seqno is updated.
100 * The fence goal seqno irq is on as long as there are unsignaled fence
101 * objects with actions attached to them.
104 static void vmw_fence_obj_destroy_locked(struct kref *kref)
106 struct vmw_fence_obj *fence =
107 container_of(kref, struct vmw_fence_obj, kref);
109 struct vmw_fence_manager *fman = fence->fman;
110 unsigned int num_fences;
112 list_del_init(&fence->head);
113 num_fences = --fman->num_fence_objects;
114 spin_unlock_irq(&fman->lock);
116 fence->destroy(fence);
120 spin_lock_irq(&fman->lock);
125 * Execute signal actions on fences recently signaled.
126 * This is done from a workqueue so we don't have to execute
127 * signal actions from atomic context.
130 static void vmw_fence_work_func(struct work_struct *work)
132 struct vmw_fence_manager *fman =
133 container_of(work, struct vmw_fence_manager, work);
134 struct list_head list;
135 struct vmw_fence_action *action, *next_action;
139 INIT_LIST_HEAD(&list);
140 mutex_lock(&fman->goal_irq_mutex);
142 spin_lock_irq(&fman->lock);
143 list_splice_init(&fman->cleanup_list, &list);
144 seqno_valid = fman->seqno_valid;
145 spin_unlock_irq(&fman->lock);
147 if (!seqno_valid && fman->goal_irq_on) {
148 fman->goal_irq_on = false;
149 vmw_goal_waiter_remove(fman->dev_priv);
151 mutex_unlock(&fman->goal_irq_mutex);
153 if (list_empty(&list))
157 * At this point, only we should be able to manipulate the
158 * list heads of the actions we have on the private list.
159 * hence fman::lock not held.
162 list_for_each_entry_safe(action, next_action, &list, head) {
163 list_del_init(&action->head);
165 action->cleanup(action);
170 struct vmw_fence_manager *vmw_fence_manager_init(struct vmw_private *dev_priv)
172 struct vmw_fence_manager *fman = kzalloc(sizeof(*fman), GFP_KERNEL);
174 if (unlikely(fman == NULL))
177 fman->dev_priv = dev_priv;
178 spin_lock_init(&fman->lock);
179 INIT_LIST_HEAD(&fman->fence_list);
180 INIT_LIST_HEAD(&fman->cleanup_list);
181 INIT_WORK(&fman->work, &vmw_fence_work_func);
182 fman->fifo_down = true;
183 fman->user_fence_size = ttm_round_pot(sizeof(struct vmw_user_fence));
184 fman->fence_size = ttm_round_pot(sizeof(struct vmw_fence_obj));
185 fman->event_fence_action_size =
186 ttm_round_pot(sizeof(struct vmw_event_fence_action));
187 mutex_init(&fman->goal_irq_mutex);
192 void vmw_fence_manager_takedown(struct vmw_fence_manager *fman)
194 unsigned long irq_flags;
197 (void) cancel_work_sync(&fman->work);
199 spin_lock_irqsave(&fman->lock, irq_flags);
200 lists_empty = list_empty(&fman->fence_list) &&
201 list_empty(&fman->cleanup_list);
202 spin_unlock_irqrestore(&fman->lock, irq_flags);
204 BUG_ON(!lists_empty);
208 static int vmw_fence_obj_init(struct vmw_fence_manager *fman,
209 struct vmw_fence_obj *fence,
212 void (*destroy) (struct vmw_fence_obj *fence))
214 unsigned long irq_flags;
215 unsigned int num_fences;
218 fence->seqno = seqno;
219 INIT_LIST_HEAD(&fence->seq_passed_actions);
222 fence->signal_mask = mask;
223 kref_init(&fence->kref);
224 fence->destroy = destroy;
225 init_waitqueue_head(&fence->queue);
227 spin_lock_irqsave(&fman->lock, irq_flags);
228 if (unlikely(fman->fifo_down)) {
232 list_add_tail(&fence->head, &fman->fence_list);
233 num_fences = ++fman->num_fence_objects;
236 spin_unlock_irqrestore(&fman->lock, irq_flags);
241 struct vmw_fence_obj *vmw_fence_obj_reference(struct vmw_fence_obj *fence)
243 if (unlikely(fence == NULL))
246 kref_get(&fence->kref);
251 * vmw_fence_obj_unreference
253 * Note that this function may not be entered with disabled irqs since
254 * it may re-enable them in the destroy function.
257 void vmw_fence_obj_unreference(struct vmw_fence_obj **fence_p)
259 struct vmw_fence_obj *fence = *fence_p;
260 struct vmw_fence_manager *fman;
262 if (unlikely(fence == NULL))
267 spin_lock_irq(&fman->lock);
268 BUG_ON(atomic_read(&fence->kref.refcount) == 0);
269 kref_put(&fence->kref, vmw_fence_obj_destroy_locked);
270 spin_unlock_irq(&fman->lock);
273 void vmw_fences_perform_actions(struct vmw_fence_manager *fman,
274 struct list_head *list)
276 struct vmw_fence_action *action, *next_action;
278 list_for_each_entry_safe(action, next_action, list, head) {
279 list_del_init(&action->head);
280 fman->pending_actions[action->type]--;
281 if (action->seq_passed != NULL)
282 action->seq_passed(action);
285 * Add the cleanup action to the cleanup list so that
286 * it will be performed by a worker task.
289 list_add_tail(&action->head, &fman->cleanup_list);
294 * vmw_fence_goal_new_locked - Figure out a new device fence goal
297 * @fman: Pointer to a fence manager.
298 * @passed_seqno: The seqno the device currently signals as passed.
300 * This function should be called with the fence manager lock held.
301 * It is typically called when we have a new passed_seqno, and
302 * we might need to update the fence goal. It checks to see whether
303 * the current fence goal has already passed, and, in that case,
304 * scans through all unsignaled fences to get the next fence object with an
305 * action attached, and sets the seqno of that fence as a new fence goal.
307 * returns true if the device goal seqno was updated. False otherwise.
309 static bool vmw_fence_goal_new_locked(struct vmw_fence_manager *fman,
313 __le32 __iomem *fifo_mem;
314 struct vmw_fence_obj *fence;
316 if (likely(!fman->seqno_valid))
319 fifo_mem = fman->dev_priv->mmio_virt;
320 goal_seqno = ioread32(fifo_mem + SVGA_FIFO_FENCE_GOAL);
321 if (likely(passed_seqno - goal_seqno >= VMW_FENCE_WRAP))
324 fman->seqno_valid = false;
325 list_for_each_entry(fence, &fman->fence_list, head) {
326 if (!list_empty(&fence->seq_passed_actions)) {
327 fman->seqno_valid = true;
328 iowrite32(fence->seqno,
329 fifo_mem + SVGA_FIFO_FENCE_GOAL);
339 * vmw_fence_goal_check_locked - Replace the device fence goal seqno if
342 * @fence: Pointer to a struct vmw_fence_obj the seqno of which should be
343 * considered as a device fence goal.
345 * This function should be called with the fence manager lock held.
346 * It is typically called when an action has been attached to a fence to
347 * check whether the seqno of that fence should be used for a fence
348 * goal interrupt. This is typically needed if the current fence goal is
349 * invalid, or has a higher seqno than that of the current fence object.
351 * returns true if the device goal seqno was updated. False otherwise.
353 static bool vmw_fence_goal_check_locked(struct vmw_fence_obj *fence)
356 __le32 __iomem *fifo_mem;
358 if (fence->signaled & DRM_VMW_FENCE_FLAG_EXEC)
361 fifo_mem = fence->fman->dev_priv->mmio_virt;
362 goal_seqno = ioread32(fifo_mem + SVGA_FIFO_FENCE_GOAL);
363 if (likely(fence->fman->seqno_valid &&
364 goal_seqno - fence->seqno < VMW_FENCE_WRAP))
367 iowrite32(fence->seqno, fifo_mem + SVGA_FIFO_FENCE_GOAL);
368 fence->fman->seqno_valid = true;
373 void vmw_fences_update(struct vmw_fence_manager *fman)
376 struct vmw_fence_obj *fence, *next_fence;
377 struct list_head action_list;
379 uint32_t seqno, new_seqno;
380 __le32 __iomem *fifo_mem = fman->dev_priv->mmio_virt;
382 seqno = ioread32(fifo_mem + SVGA_FIFO_FENCE);
384 spin_lock_irqsave(&fman->lock, flags);
385 list_for_each_entry_safe(fence, next_fence, &fman->fence_list, head) {
386 if (seqno - fence->seqno < VMW_FENCE_WRAP) {
387 list_del_init(&fence->head);
388 fence->signaled |= DRM_VMW_FENCE_FLAG_EXEC;
389 INIT_LIST_HEAD(&action_list);
390 list_splice_init(&fence->seq_passed_actions,
392 vmw_fences_perform_actions(fman, &action_list);
393 wake_up_all(&fence->queue);
398 needs_rerun = vmw_fence_goal_new_locked(fman, seqno);
400 if (!list_empty(&fman->cleanup_list))
401 (void) schedule_work(&fman->work);
402 spin_unlock_irqrestore(&fman->lock, flags);
405 * Rerun if the fence goal seqno was updated, and the
406 * hardware might have raced with that update, so that
407 * we missed a fence_goal irq.
410 if (unlikely(needs_rerun)) {
411 new_seqno = ioread32(fifo_mem + SVGA_FIFO_FENCE);
412 if (new_seqno != seqno) {
419 bool vmw_fence_obj_signaled(struct vmw_fence_obj *fence,
422 struct vmw_fence_manager *fman = fence->fman;
423 unsigned long irq_flags;
426 spin_lock_irqsave(&fman->lock, irq_flags);
427 signaled = fence->signaled;
428 spin_unlock_irqrestore(&fman->lock, irq_flags);
430 flags &= fence->signal_mask;
431 if ((signaled & flags) == flags)
434 if ((signaled & DRM_VMW_FENCE_FLAG_EXEC) == 0)
435 vmw_fences_update(fman);
437 spin_lock_irqsave(&fman->lock, irq_flags);
438 signaled = fence->signaled;
439 spin_unlock_irqrestore(&fman->lock, irq_flags);
441 return ((signaled & flags) == flags);
444 int vmw_fence_obj_wait(struct vmw_fence_obj *fence,
445 uint32_t flags, bool lazy,
446 bool interruptible, unsigned long timeout)
448 struct vmw_private *dev_priv = fence->fman->dev_priv;
451 if (likely(vmw_fence_obj_signaled(fence, flags)))
454 vmw_fifo_ping_host(dev_priv, SVGA_SYNC_GENERIC);
455 vmw_seqno_waiter_add(dev_priv);
458 ret = wait_event_interruptible_timeout
460 vmw_fence_obj_signaled(fence, flags),
463 ret = wait_event_timeout
465 vmw_fence_obj_signaled(fence, flags),
468 vmw_seqno_waiter_remove(dev_priv);
470 if (unlikely(ret == 0))
472 else if (likely(ret > 0))
478 void vmw_fence_obj_flush(struct vmw_fence_obj *fence)
480 struct vmw_private *dev_priv = fence->fman->dev_priv;
482 vmw_fifo_ping_host(dev_priv, SVGA_SYNC_GENERIC);
485 static void vmw_fence_destroy(struct vmw_fence_obj *fence)
487 struct vmw_fence_manager *fman = fence->fman;
491 * Free kernel space accounting.
493 ttm_mem_global_free(vmw_mem_glob(fman->dev_priv),
497 int vmw_fence_create(struct vmw_fence_manager *fman,
500 struct vmw_fence_obj **p_fence)
502 struct ttm_mem_global *mem_glob = vmw_mem_glob(fman->dev_priv);
503 struct vmw_fence_obj *fence;
506 ret = ttm_mem_global_alloc(mem_glob, fman->fence_size,
508 if (unlikely(ret != 0))
511 fence = kzalloc(sizeof(*fence), GFP_KERNEL);
512 if (unlikely(fence == NULL)) {
517 ret = vmw_fence_obj_init(fman, fence, seqno, mask,
519 if (unlikely(ret != 0))
528 ttm_mem_global_free(mem_glob, fman->fence_size);
533 static void vmw_user_fence_destroy(struct vmw_fence_obj *fence)
535 struct vmw_user_fence *ufence =
536 container_of(fence, struct vmw_user_fence, fence);
537 struct vmw_fence_manager *fman = fence->fman;
541 * Free kernel space accounting.
543 ttm_mem_global_free(vmw_mem_glob(fman->dev_priv),
544 fman->user_fence_size);
547 static void vmw_user_fence_base_release(struct ttm_base_object **p_base)
549 struct ttm_base_object *base = *p_base;
550 struct vmw_user_fence *ufence =
551 container_of(base, struct vmw_user_fence, base);
552 struct vmw_fence_obj *fence = &ufence->fence;
555 vmw_fence_obj_unreference(&fence);
558 int vmw_user_fence_create(struct drm_file *file_priv,
559 struct vmw_fence_manager *fman,
562 struct vmw_fence_obj **p_fence,
565 struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
566 struct vmw_user_fence *ufence;
567 struct vmw_fence_obj *tmp;
568 struct ttm_mem_global *mem_glob = vmw_mem_glob(fman->dev_priv);
572 * Kernel memory space accounting, since this object may
573 * be created by a user-space request.
576 ret = ttm_mem_global_alloc(mem_glob, fman->user_fence_size,
578 if (unlikely(ret != 0))
581 ufence = kzalloc(sizeof(*ufence), GFP_KERNEL);
582 if (unlikely(ufence == NULL)) {
587 ret = vmw_fence_obj_init(fman, &ufence->fence, seqno,
588 mask, vmw_user_fence_destroy);
589 if (unlikely(ret != 0)) {
595 * The base object holds a reference which is freed in
596 * vmw_user_fence_base_release.
598 tmp = vmw_fence_obj_reference(&ufence->fence);
599 ret = ttm_base_object_init(tfile, &ufence->base, false,
601 &vmw_user_fence_base_release, NULL);
604 if (unlikely(ret != 0)) {
606 * Free the base object's reference
608 vmw_fence_obj_unreference(&tmp);
612 *p_fence = &ufence->fence;
613 *p_handle = ufence->base.hash.key;
617 tmp = &ufence->fence;
618 vmw_fence_obj_unreference(&tmp);
620 ttm_mem_global_free(mem_glob, fman->user_fence_size);
626 * vmw_fence_fifo_down - signal all unsignaled fence objects.
629 void vmw_fence_fifo_down(struct vmw_fence_manager *fman)
631 unsigned long irq_flags;
632 struct list_head action_list;
636 * The list may be altered while we traverse it, so always
637 * restart when we've released the fman->lock.
640 spin_lock_irqsave(&fman->lock, irq_flags);
641 fman->fifo_down = true;
642 while (!list_empty(&fman->fence_list)) {
643 struct vmw_fence_obj *fence =
644 list_entry(fman->fence_list.prev, struct vmw_fence_obj,
646 kref_get(&fence->kref);
647 spin_unlock_irq(&fman->lock);
649 ret = vmw_fence_obj_wait(fence, fence->signal_mask,
651 VMW_FENCE_WAIT_TIMEOUT);
653 if (unlikely(ret != 0)) {
654 list_del_init(&fence->head);
655 fence->signaled |= DRM_VMW_FENCE_FLAG_EXEC;
656 INIT_LIST_HEAD(&action_list);
657 list_splice_init(&fence->seq_passed_actions,
659 vmw_fences_perform_actions(fman, &action_list);
660 wake_up_all(&fence->queue);
663 spin_lock_irq(&fman->lock);
665 BUG_ON(!list_empty(&fence->head));
666 kref_put(&fence->kref, vmw_fence_obj_destroy_locked);
668 spin_unlock_irqrestore(&fman->lock, irq_flags);
671 void vmw_fence_fifo_up(struct vmw_fence_manager *fman)
673 unsigned long irq_flags;
675 spin_lock_irqsave(&fman->lock, irq_flags);
676 fman->fifo_down = false;
677 spin_unlock_irqrestore(&fman->lock, irq_flags);
681 int vmw_fence_obj_wait_ioctl(struct drm_device *dev, void *data,
682 struct drm_file *file_priv)
684 struct drm_vmw_fence_wait_arg *arg =
685 (struct drm_vmw_fence_wait_arg *)data;
686 unsigned long timeout;
687 struct ttm_base_object *base;
688 struct vmw_fence_obj *fence;
689 struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
691 uint64_t wait_timeout = ((uint64_t)arg->timeout_us * HZ);
694 * 64-bit division not present on 32-bit systems, so do an
695 * approximation. (Divide by 1000000).
698 wait_timeout = (wait_timeout >> 20) + (wait_timeout >> 24) -
699 (wait_timeout >> 26);
701 if (!arg->cookie_valid) {
702 arg->cookie_valid = 1;
703 arg->kernel_cookie = jiffies + wait_timeout;
706 base = ttm_base_object_lookup(tfile, arg->handle);
707 if (unlikely(base == NULL)) {
708 printk(KERN_ERR "Wait invalid fence object handle "
710 (unsigned long)arg->handle);
714 fence = &(container_of(base, struct vmw_user_fence, base)->fence);
717 if (time_after_eq(timeout, (unsigned long)arg->kernel_cookie)) {
718 ret = ((vmw_fence_obj_signaled(fence, arg->flags)) ?
723 timeout = (unsigned long)arg->kernel_cookie - timeout;
725 ret = vmw_fence_obj_wait(fence, arg->flags, arg->lazy, true, timeout);
728 ttm_base_object_unref(&base);
731 * Optionally unref the fence object.
734 if (ret == 0 && (arg->wait_options & DRM_VMW_WAIT_OPTION_UNREF))
735 return ttm_ref_object_base_unref(tfile, arg->handle,
740 int vmw_fence_obj_signaled_ioctl(struct drm_device *dev, void *data,
741 struct drm_file *file_priv)
743 struct drm_vmw_fence_signaled_arg *arg =
744 (struct drm_vmw_fence_signaled_arg *) data;
745 struct ttm_base_object *base;
746 struct vmw_fence_obj *fence;
747 struct vmw_fence_manager *fman;
748 struct ttm_object_file *tfile = vmw_fpriv(file_priv)->tfile;
749 struct vmw_private *dev_priv = vmw_priv(dev);
751 base = ttm_base_object_lookup(tfile, arg->handle);
752 if (unlikely(base == NULL)) {
753 printk(KERN_ERR "Fence signaled invalid fence object handle "
755 (unsigned long)arg->handle);
759 fence = &(container_of(base, struct vmw_user_fence, base)->fence);
762 arg->signaled = vmw_fence_obj_signaled(fence, arg->flags);
763 spin_lock_irq(&fman->lock);
765 arg->signaled_flags = fence->signaled;
766 arg->passed_seqno = dev_priv->last_read_seqno;
767 spin_unlock_irq(&fman->lock);
769 ttm_base_object_unref(&base);
775 int vmw_fence_obj_unref_ioctl(struct drm_device *dev, void *data,
776 struct drm_file *file_priv)
778 struct drm_vmw_fence_arg *arg =
779 (struct drm_vmw_fence_arg *) data;
781 return ttm_ref_object_base_unref(vmw_fpriv(file_priv)->tfile,
788 * vmw_event_fence_action_seq_passed
790 * @action: The struct vmw_fence_action embedded in a struct
791 * vmw_event_fence_action.
793 * This function is called when the seqno of the fence where @action is
794 * attached has passed. It queues the event on the submitter's event list.
795 * This function is always called from atomic context, and may be called
798 static void vmw_event_fence_action_seq_passed(struct vmw_fence_action *action)
800 struct vmw_event_fence_action *eaction =
801 container_of(action, struct vmw_event_fence_action, action);
802 struct drm_device *dev = eaction->dev;
803 struct drm_file *file_priv = eaction->event->file_priv;
804 unsigned long irq_flags;
806 spin_lock_irqsave(&dev->event_lock, irq_flags);
808 if (likely(eaction->tv_sec != NULL)) {
811 do_gettimeofday(&tv);
812 *eaction->tv_sec = tv.tv_sec;
813 *eaction->tv_usec = tv.tv_usec;
816 list_add_tail(&eaction->event->link, &file_priv->event_list);
817 wake_up_all(&file_priv->event_wait);
818 spin_unlock_irqrestore(&dev->event_lock, irq_flags);
822 * vmw_event_fence_action_cleanup
824 * @action: The struct vmw_fence_action embedded in a struct
825 * vmw_event_fence_action.
827 * This function is the struct vmw_fence_action destructor. It's typically
828 * called from a workqueue.
830 static void vmw_event_fence_action_cleanup(struct vmw_fence_action *action)
832 struct vmw_event_fence_action *eaction =
833 container_of(action, struct vmw_event_fence_action, action);
835 vmw_fence_obj_unreference(&eaction->fence);
841 * vmw_fence_obj_add_action - Add an action to a fence object.
843 * @fence - The fence object.
844 * @action - The action to add.
846 * Note that the action callbacks may be executed before this function
849 void vmw_fence_obj_add_action(struct vmw_fence_obj *fence,
850 struct vmw_fence_action *action)
852 struct vmw_fence_manager *fman = fence->fman;
853 unsigned long irq_flags;
854 bool run_update = false;
856 mutex_lock(&fman->goal_irq_mutex);
857 spin_lock_irqsave(&fman->lock, irq_flags);
859 fman->pending_actions[action->type]++;
860 if (fence->signaled & DRM_VMW_FENCE_FLAG_EXEC) {
861 struct list_head action_list;
863 INIT_LIST_HEAD(&action_list);
864 list_add_tail(&action->head, &action_list);
865 vmw_fences_perform_actions(fman, &action_list);
867 list_add_tail(&action->head, &fence->seq_passed_actions);
870 * This function may set fman::seqno_valid, so it must
871 * be run with the goal_irq_mutex held.
873 run_update = vmw_fence_goal_check_locked(fence);
876 spin_unlock_irqrestore(&fman->lock, irq_flags);
879 if (!fman->goal_irq_on) {
880 fman->goal_irq_on = true;
881 vmw_goal_waiter_add(fman->dev_priv);
883 vmw_fences_update(fman);
885 mutex_unlock(&fman->goal_irq_mutex);
890 * vmw_event_fence_action_create - Post an event for sending when a fence
891 * object seqno has passed.
893 * @file_priv: The file connection on which the event should be posted.
894 * @fence: The fence object on which to post the event.
895 * @event: Event to be posted. This event should've been alloced
896 * using k[mz]alloc, and should've been completely initialized.
897 * @interruptible: Interruptible waits if possible.
899 * As a side effect, the object pointed to by @event may have been
900 * freed when this function returns. If this function returns with
901 * an error code, the caller needs to free that object.
904 int vmw_event_fence_action_queue(struct drm_file *file_priv,
905 struct vmw_fence_obj *fence,
906 struct drm_pending_event *event,
911 struct vmw_event_fence_action *eaction;
912 struct vmw_fence_manager *fman = fence->fman;
915 eaction = kzalloc(sizeof(*eaction), GFP_KERNEL);
916 if (unlikely(eaction == NULL))
919 eaction->event = event;
921 eaction->action.seq_passed = vmw_event_fence_action_seq_passed;
922 eaction->action.cleanup = vmw_event_fence_action_cleanup;
923 eaction->action.type = VMW_ACTION_EVENT;
925 eaction->fence = vmw_fence_obj_reference(fence);
926 eaction->dev = fman->dev_priv->dev;
927 eaction->tv_sec = tv_sec;
928 eaction->tv_usec = tv_usec;
930 vmw_fence_obj_add_action(fence, &eaction->action);
935 struct vmw_event_fence_pending {
936 struct drm_pending_event base;
937 struct drm_vmw_event_fence event;
940 int vmw_event_fence_action_create(struct drm_file *file_priv,
941 struct vmw_fence_obj *fence,
946 struct vmw_event_fence_pending *event;
947 struct drm_device *dev = fence->fman->dev_priv->dev;
948 unsigned long irq_flags;
951 spin_lock_irqsave(&dev->event_lock, irq_flags);
953 ret = (file_priv->event_space < sizeof(event->event)) ? -EBUSY : 0;
954 if (likely(ret == 0))
955 file_priv->event_space -= sizeof(event->event);
957 spin_unlock_irqrestore(&dev->event_lock, irq_flags);
959 if (unlikely(ret != 0)) {
960 DRM_ERROR("Failed to allocate event space for this file.\n");
965 event = kzalloc(sizeof(event->event), GFP_KERNEL);
966 if (unlikely(event == NULL)) {
967 DRM_ERROR("Failed to allocate an event.\n");
972 event->event.base.type = DRM_VMW_EVENT_FENCE_SIGNALED;
973 event->event.base.length = sizeof(*event);
974 event->event.user_data = user_data;
976 event->base.event = &event->event.base;
977 event->base.file_priv = file_priv;
978 event->base.destroy = (void (*) (struct drm_pending_event *)) kfree;
981 if (flags & DRM_VMW_FE_FLAG_REQ_TIME)
982 ret = vmw_event_fence_action_queue(file_priv, fence,
984 &event->event.tv_sec,
985 &event->event.tv_usec,
988 ret = vmw_event_fence_action_queue(file_priv, fence,
997 event->base.destroy(&event->base);
999 spin_lock_irqsave(&dev->event_lock, irq_flags);
1000 file_priv->event_space += sizeof(*event);
1001 spin_unlock_irqrestore(&dev->event_lock, irq_flags);
1006 int vmw_fence_event_ioctl(struct drm_device *dev, void *data,
1007 struct drm_file *file_priv)
1009 struct vmw_private *dev_priv = vmw_priv(dev);
1010 struct drm_vmw_fence_event_arg *arg =
1011 (struct drm_vmw_fence_event_arg *) data;
1012 struct vmw_fence_obj *fence = NULL;
1013 struct vmw_fpriv *vmw_fp = vmw_fpriv(file_priv);
1014 struct drm_vmw_fence_rep __user *user_fence_rep =
1015 (struct drm_vmw_fence_rep __user *)(unsigned long)
1021 * Look up an existing fence object,
1022 * and if user-space wants a new reference,
1026 struct ttm_base_object *base =
1027 ttm_base_object_lookup(vmw_fp->tfile, arg->handle);
1029 if (unlikely(base == NULL)) {
1030 DRM_ERROR("Fence event invalid fence object handle "
1032 (unsigned long)arg->handle);
1035 fence = &(container_of(base, struct vmw_user_fence,
1037 (void) vmw_fence_obj_reference(fence);
1039 if (user_fence_rep != NULL) {
1042 ret = ttm_ref_object_add(vmw_fp->tfile, base,
1043 TTM_REF_USAGE, &existed);
1044 if (unlikely(ret != 0)) {
1045 DRM_ERROR("Failed to reference a fence "
1047 goto out_no_ref_obj;
1049 handle = base->hash.key;
1051 ttm_base_object_unref(&base);
1055 * Create a new fence object.
1058 ret = vmw_execbuf_fence_commands(file_priv, dev_priv,
1062 if (unlikely(ret != 0)) {
1063 DRM_ERROR("Fence event failed to create fence.\n");
1068 BUG_ON(fence == NULL);
1070 if (arg->flags & DRM_VMW_FE_FLAG_REQ_TIME)
1071 ret = vmw_event_fence_action_create(file_priv, fence,
1076 ret = vmw_event_fence_action_create(file_priv, fence,
1081 if (unlikely(ret != 0)) {
1082 if (ret != -ERESTARTSYS)
1083 DRM_ERROR("Failed to attach event to fence.\n");
1087 vmw_execbuf_copy_fence_user(dev_priv, vmw_fp, 0, user_fence_rep, fence,
1089 vmw_fence_obj_unreference(&fence);
1092 if (user_fence_rep != NULL)
1093 ttm_ref_object_base_unref(vmw_fpriv(file_priv)->tfile,
1094 handle, TTM_REF_USAGE);
1096 vmw_fence_obj_unreference(&fence);