160 	int n = dev->coupled->online_count;  in cpuidle_coupled_parallel_barrier()
193 static inline void cpuidle_coupled_set_ready(struct cpuidle_coupled *coupled)  in cpuidle_coupled_set_ready()  argument
195 	atomic_add(MAX_WAITING_CPUS, &coupled->ready_waiting_counts);  in cpuidle_coupled_set_ready()
213 inline int cpuidle_coupled_set_not_ready(struct cpuidle_coupled *coupled)  in cpuidle_coupled_set_not_ready()  argument
218 	all = coupled->online_count | (coupled->online_count << WAITING_BITS);  in cpuidle_coupled_set_not_ready()
219 	ret = atomic_add_unless(&coupled->ready_waiting_counts,  in cpuidle_coupled_set_not_ready()
231 static inline int cpuidle_coupled_no_cpus_ready(struct cpuidle_coupled *coupled)  in cpuidle_coupled_no_cpus_ready()  argument
233 	int r = atomic_read(&coupled->ready_waiting_counts) >> WAITING_BITS;  in cpuidle_coupled_no_cpus_ready()
243 static inline bool cpuidle_coupled_cpus_ready(struct cpuidle_coupled *coupled)  in cpuidle_coupled_cpus_ready()  argument
245 	int r = atomic_read(&coupled->ready_waiting_counts) >> WAITING_BITS;  in cpuidle_coupled_cpus_ready()
246 	return r == coupled->online_count;  in cpuidle_coupled_cpus_ready()
255 static inline bool cpuidle_coupled_cpus_waiting(struct cpuidle_coupled *coupled)  in cpuidle_coupled_cpus_waiting()  argument
257 	int w = atomic_read(&coupled->ready_waiting_counts) & WAITING_MASK;  in cpuidle_coupled_cpus_waiting()
258 	return w == coupled->online_count;  in cpuidle_coupled_cpus_waiting()
267 static inline int cpuidle_coupled_no_cpus_waiting(struct cpuidle_coupled *coupled)  in cpuidle_coupled_no_cpus_waiting()  argument
269 	int w = atomic_read(&coupled->ready_waiting_counts) & WAITING_MASK;  in cpuidle_coupled_no_cpus_waiting()
281 		struct cpuidle_coupled *coupled)  in cpuidle_coupled_get_state()  argument
293 	for_each_cpu(i, &coupled->coupled_cpus)  in cpuidle_coupled_get_state()
294 		if (cpu_online(i) && coupled->requested_state[i] < state)  in cpuidle_coupled_get_state()
295 			state = coupled->requested_state[i];  in cpuidle_coupled_get_state()
335 		struct cpuidle_coupled *coupled)  in cpuidle_coupled_poke_others()  argument
339 	for_each_cpu(cpu, &coupled->coupled_cpus)  in cpuidle_coupled_poke_others()
354 		struct cpuidle_coupled *coupled, int next_state)  in cpuidle_coupled_set_waiting()  argument
356 	coupled->requested_state[cpu] = next_state;  in cpuidle_coupled_set_waiting()
362 	return atomic_inc_return(&coupled->ready_waiting_counts) & WAITING_MASK;  in cpuidle_coupled_set_waiting()
373 		struct cpuidle_coupled *coupled)  in cpuidle_coupled_set_not_waiting()  argument
381 	atomic_dec(&coupled->ready_waiting_counts);  in cpuidle_coupled_set_not_waiting()
383 	coupled->requested_state[cpu] = CPUIDLE_COUPLED_NOT_IDLE;  in cpuidle_coupled_set_not_waiting()
395 static void cpuidle_coupled_set_done(int cpu, struct cpuidle_coupled *coupled)  in cpuidle_coupled_set_done()  argument
397 	cpuidle_coupled_set_not_waiting(cpu, coupled);  in cpuidle_coupled_set_done()
398 	atomic_sub(MAX_WAITING_CPUS, &coupled->ready_waiting_counts);  in cpuidle_coupled_set_done()
427 static bool cpuidle_coupled_any_pokes_pending(struct cpuidle_coupled *coupled)  in cpuidle_coupled_any_pokes_pending()  argument
432 	cpumask_and(&cpus, cpu_online_mask, &coupled->coupled_cpus);  in cpuidle_coupled_any_pokes_pending()
461 	struct cpuidle_coupled *coupled = dev->coupled;  in cpuidle_enter_state_coupled()  local
464 	if (!coupled)  in cpuidle_enter_state_coupled()
467 	while (coupled->prevent) {  in cpuidle_enter_state_coupled()
484 	w = cpuidle_coupled_set_waiting(dev->cpu, coupled, next_state);  in cpuidle_enter_state_coupled()
492 	if (w == coupled->online_count) {  in cpuidle_enter_state_coupled()
494 		cpuidle_coupled_poke_others(dev->cpu, coupled);  in cpuidle_enter_state_coupled()
506 	while (!cpuidle_coupled_cpus_waiting(coupled) ||  in cpuidle_enter_state_coupled()
512 			cpuidle_coupled_set_not_waiting(dev->cpu, coupled);  in cpuidle_enter_state_coupled()
516 		if (coupled->prevent) {  in cpuidle_enter_state_coupled()
517 			cpuidle_coupled_set_not_waiting(dev->cpu, coupled);  in cpuidle_enter_state_coupled()
528 		cpuidle_coupled_set_not_waiting(dev->cpu, coupled);  in cpuidle_enter_state_coupled()
547 	cpuidle_coupled_set_ready(coupled);  in cpuidle_enter_state_coupled()
548 	while (!cpuidle_coupled_cpus_ready(coupled)) {  in cpuidle_enter_state_coupled()
550 		if (!cpuidle_coupled_cpus_waiting(coupled))  in cpuidle_enter_state_coupled()
551 			if (!cpuidle_coupled_set_not_ready(coupled))  in cpuidle_enter_state_coupled()
572 	if (cpuidle_coupled_any_pokes_pending(coupled)) {  in cpuidle_enter_state_coupled()
573 		cpuidle_coupled_set_done(dev->cpu, coupled);  in cpuidle_enter_state_coupled()
575 		cpuidle_coupled_parallel_barrier(dev, &coupled->abort_barrier);  in cpuidle_enter_state_coupled()
580 	next_state = cpuidle_coupled_get_state(dev, coupled);  in cpuidle_enter_state_coupled()
584 	cpuidle_coupled_set_done(dev->cpu, coupled);  in cpuidle_enter_state_coupled()
608 	while (!cpuidle_coupled_no_cpus_ready(coupled))  in cpuidle_enter_state_coupled()
614 static void cpuidle_coupled_update_online_cpus(struct cpuidle_coupled *coupled)  in cpuidle_coupled_update_online_cpus()  argument
617 	cpumask_and(&cpus, cpu_online_mask, &coupled->coupled_cpus);  in cpuidle_coupled_update_online_cpus()
618 	coupled->online_count = cpumask_weight(&cpus);  in cpuidle_coupled_update_online_cpus()
634 	struct cpuidle_coupled *coupled;  in cpuidle_coupled_register_device()  local
641 		if (other_dev && other_dev->coupled) {  in cpuidle_coupled_register_device()
642 			coupled = other_dev->coupled;  in cpuidle_coupled_register_device()
648 	coupled = kzalloc(sizeof(struct cpuidle_coupled), GFP_KERNEL);  in cpuidle_coupled_register_device()
649 	if (!coupled)  in cpuidle_coupled_register_device()
652 	coupled->coupled_cpus = dev->coupled_cpus;  in cpuidle_coupled_register_device()
655 	dev->coupled = coupled;  in cpuidle_coupled_register_device()
656 	if (WARN_ON(!cpumask_equal(&dev->coupled_cpus, &coupled->coupled_cpus)))  in cpuidle_coupled_register_device()
657 		coupled->prevent++;  in cpuidle_coupled_register_device()
659 	cpuidle_coupled_update_online_cpus(coupled);  in cpuidle_coupled_register_device()
661 	coupled->refcnt++;  in cpuidle_coupled_register_device()
680 	struct cpuidle_coupled *coupled = dev->coupled;  in cpuidle_coupled_unregister_device()  local
685 	if (--coupled->refcnt)  in cpuidle_coupled_unregister_device()
686 		kfree(coupled);  in cpuidle_coupled_unregister_device()
687 	dev->coupled = NULL;  in cpuidle_coupled_unregister_device()
697 static void cpuidle_coupled_prevent_idle(struct cpuidle_coupled *coupled)  in cpuidle_coupled_prevent_idle()  argument
702 	coupled->prevent++;  in cpuidle_coupled_prevent_idle()
703 	cpuidle_coupled_poke_others(cpu, coupled);  in cpuidle_coupled_prevent_idle()
705 	while (!cpuidle_coupled_no_cpus_waiting(coupled))  in cpuidle_coupled_prevent_idle()
716 static void cpuidle_coupled_allow_idle(struct cpuidle_coupled *coupled)  in cpuidle_coupled_allow_idle()  argument
725 	coupled->prevent--;  in cpuidle_coupled_allow_idle()
727 	cpuidle_coupled_poke_others(cpu, coupled);  in cpuidle_coupled_allow_idle()
761 	if (!dev || !dev->coupled)  in cpuidle_coupled_cpu_notify()
767 		cpuidle_coupled_prevent_idle(dev->coupled);  in cpuidle_coupled_cpu_notify()
771 		cpuidle_coupled_update_online_cpus(dev->coupled);  in cpuidle_coupled_cpu_notify()
775 		cpuidle_coupled_allow_idle(dev->coupled);  in cpuidle_coupled_cpu_notify()