pci/ctxfi/cttimer.c

144 static void ct_xfitimer_irq_rearm(struct ct_timer *atimer, int ticks)
146 	struct hw *hw = atimer->atc->hw;
150 	if (!atimer->running)
152 	atimer->running = 1;
155 static void ct_xfitimer_irq_stop(struct ct_timer *atimer)
157 	if (atimer->running) {
158 		struct hw *hw = atimer->atc->hw;
161 		atimer->running = 0;
165 static inline unsigned int ct_xfitimer_get_wc(struct ct_timer *atimer)
167 	struct hw *hw = atimer->atc->hw;
179 static int ct_xfitimer_reprogram(struct ct_timer *atimer, int can_update)
186 	if (list_empty(&atimer->running_head)) {
187 		ct_xfitimer_irq_stop(atimer);
188 		atimer->reprogram = 0; /* clear flag */
192 	wc = ct_xfitimer_get_wc(atimer);
193 	diff = wc - atimer->wc;
194 	atimer->wc = wc;
195 	list_for_each_entry(ti, &atimer->running_head, running_list) {
223 	ct_xfitimer_irq_rearm(atimer, min_intr);
224 	atimer->reprogram = 0; /* clear flag */
229 static void ct_xfitimer_check_period(struct ct_timer *atimer)
234 	spin_lock_irqsave(&atimer->list_lock, flags);
235 	list_for_each_entry(ti, &atimer->instance_head, instance_list) {
241 	spin_unlock_irqrestore(&atimer->list_lock, flags);
245 static void ct_xfitimer_callback(struct ct_timer *atimer)
250 	spin_lock_irqsave(&atimer->lock, flags);
251 	atimer->irq_handling = 1;
253 		update = ct_xfitimer_reprogram(atimer, 1);
254 		spin_unlock(&atimer->lock);
256 			ct_xfitimer_check_period(atimer);
257 		spin_lock(&atimer->lock);
258 	} while (atimer->reprogram);
259 	atimer->irq_handling = 0;
260 	spin_unlock_irqrestore(&atimer->lock, flags);
272 static void ct_xfitimer_update(struct ct_timer *atimer)
276 	spin_lock_irqsave(&atimer->lock, flags);
277 	if (atimer->irq_handling) {
279 		atimer->reprogram = 1;
280 		spin_unlock_irqrestore(&atimer->lock, flags);
284 	ct_xfitimer_irq_stop(atimer);
285 	ct_xfitimer_reprogram(atimer, 0);
286 	spin_unlock_irqrestore(&atimer->lock, flags);
291 	struct ct_timer *atimer = ti->timer_base;
294 	spin_lock_irqsave(&atimer->lock, flags);
296 		atimer->wc = ct_xfitimer_get_wc(atimer);
299 	list_add(&ti->running_list, &atimer->running_head);
300 	spin_unlock_irqrestore(&atimer->lock, flags);
301 	ct_xfitimer_update(atimer);
306 	struct ct_timer *atimer = ti->timer_base;
309 	spin_lock_irqsave(&atimer->lock, flags);
312 	spin_unlock_irqrestore(&atimer->lock, flags);
313 	ct_xfitimer_update(atimer);
316 static void ct_xfitimer_free_global(struct ct_timer *atimer)
318 	ct_xfitimer_irq_stop(atimer);
334 ct_timer_instance_new(struct ct_timer *atimer, struct ct_atc_pcm *apcm)
344 	ti->timer_base = atimer;
347 	if (atimer->ops->init)
348 		atimer->ops->init(ti);
350 	spin_lock_irq(&atimer->list_lock);
351 	list_add(&ti->instance_list, &atimer->instance_head);
352 	spin_unlock_irq(&atimer->list_lock);
367 	struct ct_timer *atimer = ti->timer_base;
368 	atimer->ops->start(ti);
373 	struct ct_timer *atimer = ti->timer_base;
374 	atimer->ops->stop(ti);
379 	struct ct_timer *atimer = ti->timer_base;
381 	atimer->ops->stop(ti); /* to be sure */
382 	if (atimer->ops->free_instance)
383 		atimer->ops->free_instance(ti);
385 	spin_lock_irq(&atimer->list_lock);
387 	spin_unlock_irq(&atimer->list_lock);
407 	struct ct_timer *atimer;
410 	atimer = kzalloc(sizeof(*atimer), GFP_KERNEL);
411 	if (!atimer)
413 	spin_lock_init(&atimer->lock);
414 	spin_lock_init(&atimer->list_lock);
415 	INIT_LIST_HEAD(&atimer->instance_head);
416 	INIT_LIST_HEAD(&atimer->running_head);
417 	atimer->atc = atc;
421 		atimer->ops = &ct_xfitimer_ops;
422 		hw->irq_callback_data = atimer;
426 		atimer->ops = &ct_systimer_ops;
428 	return atimer;
431 void ct_timer_free(struct ct_timer *atimer)
433 	struct hw *hw = atimer->atc->hw;
435 	if (atimer->ops->free_global)
436 		atimer->ops->free_global(atimer);
437 	kfree(atimer);