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drm: Create drm_send_event helpers
Use them in the core vblank code and exynos/vmwgfx drivers. Note that the difference between wake_up_all and _interruptible in vmwgfx doesn't matter since the only waiter is the core code in drm_fops.c. And that is interruptible. v2: Adjust existing kerneldoc too. Reviewed-by: Alex Deucher <alexander.deucher@amd.com> (v1) Acked-by: Daniel Stone <daniels@collabora.com> Cc: Alex Deucher <alexander.deucher@amd.com> Cc: Thomas Hellstrom <thellstrom@vmware.com> Cc: Inki Dae <inki.dae@samsung.com> Link: http://patchwork.freedesktop.org/patch/msgid/1452548477-15905-6-git-send-email-daniel.vetter@ffwll.ch Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> [danvet: Squash in compile fixup, spotted by 0-day.] Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
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@ -687,7 +687,9 @@ EXPORT_SYMBOL(drm_poll);
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* This function prepares the passed in event for eventual delivery. If the event
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* doesn't get delivered (because the IOCTL fails later on, before queuing up
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* anything) then the even must be cancelled and freed using
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* drm_event_cancel_free().
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* drm_event_cancel_free(). Successfully initialized events should be sent out
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* using drm_send_event() or drm_send_event_locked() to signal completion of the
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* asynchronous event to userspace.
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*
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* If callers embedded @p into a larger structure it must be allocated with
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* kmalloc and @p must be the first member element.
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@ -743,3 +745,41 @@ void drm_event_cancel_free(struct drm_device *dev,
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p->destroy(p);
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}
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EXPORT_SYMBOL(drm_event_cancel_free);
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/**
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* drm_send_event_locked - send DRM event to file descriptor
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* @dev: DRM device
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* @e: DRM event to deliver
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*
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* This function sends the event @e, initialized with drm_event_reserve_init(),
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* to its associated userspace DRM file. Callers must already hold
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* dev->event_lock, see drm_send_event() for the unlocked version.
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*/
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void drm_send_event_locked(struct drm_device *dev, struct drm_pending_event *e)
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{
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assert_spin_locked(&dev->event_lock);
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list_add_tail(&e->link,
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&e->file_priv->event_list);
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wake_up_interruptible(&e->file_priv->event_wait);
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}
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EXPORT_SYMBOL(drm_send_event_locked);
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/**
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* drm_send_event - send DRM event to file descriptor
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* @dev: DRM device
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* @e: DRM event to deliver
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*
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* This function sends the event @e, initialized with drm_event_reserve_init(),
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* to its associated userspace DRM file. This function acquires dev->event_lock,
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* see drm_send_event_locked() for callers which already hold this lock.
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*/
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void drm_send_event(struct drm_device *dev, struct drm_pending_event *e)
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{
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unsigned long irqflags;
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spin_lock_irqsave(&dev->event_lock, irqflags);
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drm_send_event_locked(dev, e);
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spin_unlock_irqrestore(&dev->event_lock, irqflags);
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}
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EXPORT_SYMBOL(drm_send_event);
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@ -983,15 +983,12 @@ static void send_vblank_event(struct drm_device *dev,
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struct drm_pending_vblank_event *e,
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unsigned long seq, struct timeval *now)
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{
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assert_spin_locked(&dev->event_lock);
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e->event.sequence = seq;
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e->event.tv_sec = now->tv_sec;
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e->event.tv_usec = now->tv_usec;
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list_add_tail(&e->base.link,
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&e->base.file_priv->event_list);
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wake_up_interruptible(&e->base.file_priv->event_wait);
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drm_send_event_locked(dev, &e->base);
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trace_drm_vblank_event_delivered(e->base.pid, e->pipe,
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e->event.sequence);
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}
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@ -880,7 +880,6 @@ static void g2d_finish_event(struct g2d_data *g2d, u32 cmdlist_no)
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struct g2d_runqueue_node *runqueue_node = g2d->runqueue_node;
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struct drm_exynos_pending_g2d_event *e;
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struct timeval now;
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unsigned long flags;
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if (list_empty(&runqueue_node->event_list))
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return;
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@ -893,10 +892,7 @@ static void g2d_finish_event(struct g2d_data *g2d, u32 cmdlist_no)
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e->event.tv_usec = now.tv_usec;
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e->event.cmdlist_no = cmdlist_no;
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spin_lock_irqsave(&drm_dev->event_lock, flags);
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list_move_tail(&e->base.link, &e->base.file_priv->event_list);
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wake_up_interruptible(&e->base.file_priv->event_wait);
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spin_unlock_irqrestore(&drm_dev->event_lock, flags);
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drm_send_event(drm_dev, &e->base);
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}
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static irqreturn_t g2d_irq_handler(int irq, void *dev_id)
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@ -1407,7 +1407,6 @@ static int ipp_send_event(struct exynos_drm_ippdrv *ippdrv,
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struct drm_exynos_ipp_send_event *e;
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struct list_head *head;
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struct timeval now;
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unsigned long flags;
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u32 tbuf_id[EXYNOS_DRM_OPS_MAX] = {0, };
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int ret, i;
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@ -1520,10 +1519,7 @@ static int ipp_send_event(struct exynos_drm_ippdrv *ippdrv,
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for_each_ipp_ops(i)
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e->event.buf_id[i] = tbuf_id[i];
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spin_lock_irqsave(&drm_dev->event_lock, flags);
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list_move_tail(&e->base.link, &e->base.file_priv->event_list);
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wake_up_interruptible(&e->base.file_priv->event_wait);
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spin_unlock_irqrestore(&drm_dev->event_lock, flags);
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drm_send_event(drm_dev, &e->base);
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mutex_unlock(&c_node->event_lock);
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DRM_DEBUG_KMS("done cmd[%d]prop_id[%d]buf_id[%d]\n",
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@ -880,9 +880,8 @@ static void vmw_event_fence_action_seq_passed(struct vmw_fence_action *action)
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}
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list_del_init(&eaction->fpriv_head);
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list_add_tail(&eaction->event->link, &file_priv->event_list);
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eaction->event = NULL;
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wake_up_all(&file_priv->event_wait);
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drm_send_event_locked(dev, eaction->event);
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spin_unlock_irqrestore(&dev->event_lock, irq_flags);
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}
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@ -932,6 +932,8 @@ int drm_event_reserve_init(struct drm_device *dev,
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struct drm_event *e);
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void drm_event_cancel_free(struct drm_device *dev,
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struct drm_pending_event *p);
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void drm_send_event_locked(struct drm_device *dev, struct drm_pending_event *e);
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void drm_send_event(struct drm_device *dev, struct drm_pending_event *e);
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/* Misc. IOCTL support (drm_ioctl.c) */
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int drm_noop(struct drm_device *dev, void *data,
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