243 static void dummy_systimer_rearm(struct dummy_systimer_pcm *dpcm)  in dummy_systimer_rearm()  argument
245 	mod_timer(&dpcm->timer, jiffies +  in dummy_systimer_rearm()
246 		DIV_ROUND_UP(dpcm->frac_period_rest, dpcm->rate));  in dummy_systimer_rearm()
249 static void dummy_systimer_update(struct dummy_systimer_pcm *dpcm)  in dummy_systimer_update()  argument
253 	delta = jiffies - dpcm->base_time;  in dummy_systimer_update()
256 	dpcm->base_time += delta;  in dummy_systimer_update()
257 	delta *= dpcm->rate;  in dummy_systimer_update()
258 	dpcm->frac_pos += delta;  in dummy_systimer_update()
259 	while (dpcm->frac_pos >= dpcm->frac_buffer_size)  in dummy_systimer_update()
260 		dpcm->frac_pos -= dpcm->frac_buffer_size;  in dummy_systimer_update()
261 	while (dpcm->frac_period_rest <= delta) {  in dummy_systimer_update()
262 		dpcm->elapsed++;  in dummy_systimer_update()
263 		dpcm->frac_period_rest += dpcm->frac_period_size;  in dummy_systimer_update()
265 	dpcm->frac_period_rest -= delta;  in dummy_systimer_update()
270 	struct dummy_systimer_pcm *dpcm = substream->runtime->private_data;  in dummy_systimer_start()  local
271 	spin_lock(&dpcm->lock);  in dummy_systimer_start()
272 	dpcm->base_time = jiffies;  in dummy_systimer_start()
273 	dummy_systimer_rearm(dpcm);  in dummy_systimer_start()
274 	spin_unlock(&dpcm->lock);  in dummy_systimer_start()
280 	struct dummy_systimer_pcm *dpcm = substream->runtime->private_data;  in dummy_systimer_stop()  local
281 	spin_lock(&dpcm->lock);  in dummy_systimer_stop()
282 	del_timer(&dpcm->timer);  in dummy_systimer_stop()
283 	spin_unlock(&dpcm->lock);  in dummy_systimer_stop()
290 	struct dummy_systimer_pcm *dpcm = runtime->private_data;  in dummy_systimer_prepare()  local
292 	dpcm->frac_pos = 0;  in dummy_systimer_prepare()
293 	dpcm->rate = runtime->rate;  in dummy_systimer_prepare()
294 	dpcm->frac_buffer_size = runtime->buffer_size * HZ;  in dummy_systimer_prepare()
295 	dpcm->frac_period_size = runtime->period_size * HZ;  in dummy_systimer_prepare()
296 	dpcm->frac_period_rest = dpcm->frac_period_size;  in dummy_systimer_prepare()
297 	dpcm->elapsed = 0;  in dummy_systimer_prepare()
304 	struct dummy_systimer_pcm *dpcm = from_timer(dpcm, t, timer);  in dummy_systimer_callback()  local
308 	spin_lock_irqsave(&dpcm->lock, flags);  in dummy_systimer_callback()
309 	dummy_systimer_update(dpcm);  in dummy_systimer_callback()
310 	dummy_systimer_rearm(dpcm);  in dummy_systimer_callback()
311 	elapsed = dpcm->elapsed;  in dummy_systimer_callback()
312 	dpcm->elapsed = 0;  in dummy_systimer_callback()
313 	spin_unlock_irqrestore(&dpcm->lock, flags);  in dummy_systimer_callback()
315 		snd_pcm_period_elapsed(dpcm->substream);  in dummy_systimer_callback()
321 	struct dummy_systimer_pcm *dpcm = substream->runtime->private_data;  in dummy_systimer_pointer()  local
324 	spin_lock(&dpcm->lock);  in dummy_systimer_pointer()
325 	dummy_systimer_update(dpcm);  in dummy_systimer_pointer()
326 	pos = dpcm->frac_pos / HZ;  in dummy_systimer_pointer()
327 	spin_unlock(&dpcm->lock);  in dummy_systimer_pointer()
333 	struct dummy_systimer_pcm *dpcm;  in dummy_systimer_create()  local
335 	dpcm = kzalloc(sizeof(*dpcm), GFP_KERNEL);  in dummy_systimer_create()
336 	if (!dpcm)  in dummy_systimer_create()
338 	substream->runtime->private_data = dpcm;  in dummy_systimer_create()
339 	timer_setup(&dpcm->timer, dummy_systimer_callback, 0);  in dummy_systimer_create()
340 	spin_lock_init(&dpcm->lock);  in dummy_systimer_create()
341 	dpcm->substream = substream;  in dummy_systimer_create()
376 	struct dummy_hrtimer_pcm *dpcm;  in dummy_hrtimer_callback()  local
378 	dpcm = container_of(timer, struct dummy_hrtimer_pcm, timer);  in dummy_hrtimer_callback()
379 	if (!atomic_read(&dpcm->running))  in dummy_hrtimer_callback()
385 	snd_pcm_period_elapsed(dpcm->substream);  in dummy_hrtimer_callback()
386 	if (!atomic_read(&dpcm->running))  in dummy_hrtimer_callback()
389 	hrtimer_forward_now(timer, dpcm->period_time);  in dummy_hrtimer_callback()
395 	struct dummy_hrtimer_pcm *dpcm = substream->runtime->private_data;  in dummy_hrtimer_start()  local
397 	dpcm->base_time = hrtimer_cb_get_time(&dpcm->timer);  in dummy_hrtimer_start()
398 	hrtimer_start(&dpcm->timer, dpcm->period_time, HRTIMER_MODE_REL_SOFT);  in dummy_hrtimer_start()
399 	atomic_set(&dpcm->running, 1);  in dummy_hrtimer_start()
405 	struct dummy_hrtimer_pcm *dpcm = substream->runtime->private_data;  in dummy_hrtimer_stop()  local
407 	atomic_set(&dpcm->running, 0);  in dummy_hrtimer_stop()
408 	if (!hrtimer_callback_running(&dpcm->timer))  in dummy_hrtimer_stop()
409 		hrtimer_cancel(&dpcm->timer);  in dummy_hrtimer_stop()
413 static inline void dummy_hrtimer_sync(struct dummy_hrtimer_pcm *dpcm)  in dummy_hrtimer_sync()  argument
415 	hrtimer_cancel(&dpcm->timer);  in dummy_hrtimer_sync()
422 	struct dummy_hrtimer_pcm *dpcm = runtime->private_data;  in dummy_hrtimer_pointer()  local
426 	delta = ktime_us_delta(hrtimer_cb_get_time(&dpcm->timer),  in dummy_hrtimer_pointer()
427 			       dpcm->base_time);  in dummy_hrtimer_pointer()
436 	struct dummy_hrtimer_pcm *dpcm = runtime->private_data;  in dummy_hrtimer_prepare()  local
441 	dummy_hrtimer_sync(dpcm);  in dummy_hrtimer_prepare()
447 	dpcm->period_time = ktime_set(sec, nsecs);  in dummy_hrtimer_prepare()
454 	struct dummy_hrtimer_pcm *dpcm;  in dummy_hrtimer_create()  local
456 	dpcm = kzalloc(sizeof(*dpcm), GFP_KERNEL);  in dummy_hrtimer_create()
457 	if (!dpcm)  in dummy_hrtimer_create()
459 	substream->runtime->private_data = dpcm;  in dummy_hrtimer_create()
460 	hrtimer_init(&dpcm->timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL_SOFT);  in dummy_hrtimer_create()
461 	dpcm->timer.function = dummy_hrtimer_callback;  in dummy_hrtimer_create()
462 	dpcm->substream = substream;  in dummy_hrtimer_create()
463 	atomic_set(&dpcm->running, 0);  in dummy_hrtimer_create()
469 	struct dummy_hrtimer_pcm *dpcm = substream->runtime->private_data;  in dummy_hrtimer_free()  local
470 	dummy_hrtimer_sync(dpcm);  in dummy_hrtimer_free()
471 	kfree(dpcm);  in dummy_hrtimer_free()