Beispiel #1
0
/*
 * Event handler for periodic broadcast ticks
 */
static void tick_handle_periodic_broadcast(struct clock_event_device *dev)
{
	ktime_t next;

	tick_do_periodic_broadcast();

	/*
	 * The device is in periodic mode. No reprogramming necessary:
	 */
	if (dev->mode == CLOCK_EVT_MODE_PERIODIC)
		return;

	/*
	 * Setup the next period for devices, which do not have
	 * periodic mode. We read dev->next_event first and add to it
	 * when the event alrady expired. clockevents_program_event()
	 * sets dev->next_event only when the event is really
	 * programmed to the device.
	 */
	for (next = dev->next_event; ;) {
		next = ktime_add(next, tick_period);

		if (!clockevents_program_event(dev, next, ktime_get()))
			return;
		tick_do_periodic_broadcast();
	}
}
Beispiel #2
0
/*
 * Event handler for periodic broadcast ticks
 */
static void tick_handle_periodic_broadcast(struct clock_event_device *dev)
{
	ktime_t next;

	raw_spin_lock(&tick_broadcast_lock);

	tick_do_periodic_broadcast();

	/*
	 * The device is in periodic mode. No reprogramming necessary:
	 */
	if (dev->state == CLOCK_EVT_STATE_PERIODIC)
		goto unlock;

	/*
	 * Setup the next period for devices, which do not have
	 * periodic mode. We read dev->next_event first and add to it
	 * when the event already expired. clockevents_program_event()
	 * sets dev->next_event only when the event is really
	 * programmed to the device.
	 */
	for (next = dev->next_event; ;) {
		next = ktime_add(next, tick_period);

		if (!clockevents_program_event(dev, next, false))
			goto unlock;
		tick_do_periodic_broadcast();
	}
unlock:
	raw_spin_unlock(&tick_broadcast_lock);
}
/*
 * Event handler for periodic broadcast ticks
 */
static void tick_handle_periodic_broadcast(struct clock_event_device *dev)
{
	struct tick_device *td = this_cpu_ptr(&tick_cpu_device);
	bool bc_local;

	raw_spin_lock(&tick_broadcast_lock);

	/* Handle spurious interrupts gracefully */
	if (clockevent_state_shutdown(tick_broadcast_device.evtdev)) {
		raw_spin_unlock(&tick_broadcast_lock);
		return;
	}

	bc_local = tick_do_periodic_broadcast();

	if (clockevent_state_oneshot(dev)) {
		ktime_t next = ktime_add(dev->next_event, tick_period);

		clockevents_program_event(dev, next, true);
	}
	raw_spin_unlock(&tick_broadcast_lock);

	/*
	 * We run the handler of the local cpu after dropping
	 * tick_broadcast_lock because the handler might deadlock when
	 * trying to switch to oneshot mode.
	 */
	if (bc_local)
		td->evtdev->event_handler(td->evtdev);
}
Beispiel #4
0
static void tick_handle_periodic_broadcast(struct clock_event_device *dev)
{
	ktime_t next;

	tick_do_periodic_broadcast();

	if (dev->mode == CLOCK_EVT_MODE_PERIODIC)
		return;

	for (next = dev->next_event; ;) {
		next = ktime_add(next, tick_period);

		if (!clockevents_program_event(dev, next, false))
			return;
		tick_do_periodic_broadcast();
	}
}
Beispiel #5
0
/*
 * Event handler for periodic broadcast ticks
 */
static void tick_handle_periodic_broadcast(struct clock_event_device *dev)
{
	dev->next_event.tv64 = KTIME_MAX;

	tick_do_periodic_broadcast();

	/*
	 * The device is in periodic mode. No reprogramming necessary:
	 */
	if (dev->mode == CLOCK_EVT_MODE_PERIODIC)
		return;

	/*
	 * Setup the next period for devices, which do not have
	 * periodic mode:
	 */
	for (;;) {
		ktime_t next = ktime_add(dev->next_event, tick_period);

		if (!clockevents_program_event(dev, next, ktime_get()))
			return;
		tick_do_periodic_broadcast();
	}
}