3  * Power Management Quality of Service (PM QoS) support base.
11  * Provided here is an interface for specifying PM QoS dependencies.  It allows
12  * entities depending on QoS constraints to register their requests which are
18  * global CPU latency QoS requests and frequency QoS requests are provided.
51  * @c: List of PM QoS constraint requests.
71 		WARN(1, "Unknown PM QoS type in %s\n", __func__);  in pm_qos_get_value()
82  * pm_qos_update_target - Update a list of PM QoS constraint requests.
83  * @c: List of PM QoS requests.
88  * Update the given list of PM QoS constraint requests, @c, by carrying an
149  * pm_qos_flags_remove_req - Remove device PM QoS flags request.
150  * @pqf: Device PM QoS flags set to remove the request from.
166  * pm_qos_update_flags - Update a set of PM QoS flags.
167  * @pqf: Set of PM QoS flags to update.
213 /* Definitions related to the CPU latency QoS. */
229  * cpu_latency_qos_limit - Return current system-wide CPU latency QoS limit.
237  * cpu_latency_qos_request_active - Check the given PM QoS request.
238  * @req: PM QoS request to check.
240  * Return: 'true' if @req has been added to the CPU latency QoS list, 'false'
245 	return req->qos == &cpu_latency_constraints;  in cpu_latency_qos_request_active()
252 	int ret = pm_qos_update_target(req->qos, &req->node, action, value);  in cpu_latency_qos_apply()
258  * cpu_latency_qos_add_request - Add new CPU latency QoS request.
263  * a new entry to the CPU latency QoS list and recompute the effective QoS
267  * QoS request represented by it.
281 	req->qos = &cpu_latency_constraints;  in cpu_latency_qos_add_request()
287  * cpu_latency_qos_update_request - Modify existing CPU latency QoS request.
288  * @req : QoS request to update.
291  * Use @new_value to update the QoS request represented by @req in the CPU
292  * latency QoS list along with updating the effective constraint value for that
315  * cpu_latency_qos_remove_request - Remove existing CPU latency QoS request.
316  * @req: QoS request to remove.
318  * Remove the CPU latency QoS request represented by @req from the CPU latency
319  * QoS list along with updating the effective constraint value for that list.
338 /* User space interface to the CPU latency QoS via misc device. */
432 /* Definitions related to the frequency QoS below. */
440  * freq_constraints_init - Initialize frequency QoS constraints.
441  * @qos: Frequency QoS constraints to initialize.
443 void freq_constraints_init(struct freq_constraints *qos)  in freq_constraints_init()  argument
447 	c = &qos->min_freq;  in freq_constraints_init()
453 	c->notifiers = &qos->min_freq_notifiers;  in freq_constraints_init()
456 	c = &qos->max_freq;  in freq_constraints_init()
462 	c->notifiers = &qos->max_freq_notifiers;  in freq_constraints_init()
467  * freq_qos_read_value - Get frequency QoS constraint for a given list.
468  * @qos: Constraints to evaluate.
469  * @type: QoS request type.
471 s32 freq_qos_read_value(struct freq_constraints *qos,  in freq_qos_read_value()  argument
478 		ret = IS_ERR_OR_NULL(qos) ?  in freq_qos_read_value()
480 			pm_qos_read_value(&qos->min_freq);  in freq_qos_read_value()
483 		ret = IS_ERR_OR_NULL(qos) ?  in freq_qos_read_value()
485 			pm_qos_read_value(&qos->max_freq);  in freq_qos_read_value()
496  * freq_qos_apply - Add/modify/remove frequency QoS request.
499  * @value: Value to assign to the QoS request.
510 		ret = pm_qos_update_target(&req->qos->min_freq, &req->pnode,  in freq_qos_apply()
514 		ret = pm_qos_update_target(&req->qos->max_freq, &req->pnode,  in freq_qos_apply()
525  * freq_qos_add_request - Insert new frequency QoS request into a given list.
526  * @qos: Constraints to update.
531  * Insert a new entry into the @qos list of requests, recompute the effective
532  * QoS constraint value for that list and initialize the @req object.  The
538 int freq_qos_add_request(struct freq_constraints *qos,  in freq_qos_add_request()  argument
544 	if (IS_ERR_OR_NULL(qos) || !req || freq_qos_value_invalid(value))  in freq_qos_add_request()
551 	req->qos = qos;  in freq_qos_add_request()
555 		req->qos = NULL;  in freq_qos_add_request()
564  * freq_qos_update_request - Modify existing frequency QoS request.
568  * Update an existing frequency QoS request along with the effective constraint
591  * freq_qos_remove_request - Remove frequency QoS request from its list.
594  * Remove the given frequency QoS request from the list of constraints it
612 	req->qos = NULL;  in freq_qos_remove_request()
620  * freq_qos_add_notifier - Add frequency QoS change notifier.
621  * @qos: List of requests to add the notifier to.
625 int freq_qos_add_notifier(struct freq_constraints *qos,  in freq_qos_add_notifier()  argument
631 	if (IS_ERR_OR_NULL(qos) || !notifier)  in freq_qos_add_notifier()
636 		ret = blocking_notifier_chain_register(qos->min_freq.notifiers,  in freq_qos_add_notifier()
640 		ret = blocking_notifier_chain_register(qos->max_freq.notifiers,  in freq_qos_add_notifier()
653  * freq_qos_remove_notifier - Remove frequency QoS change notifier.
654  * @qos: List of requests to remove the notifier from.
658 int freq_qos_remove_notifier(struct freq_constraints *qos,  in freq_qos_remove_notifier()  argument
664 	if (IS_ERR_OR_NULL(qos) || !notifier)  in freq_qos_remove_notifier()
669 		ret = blocking_notifier_chain_unregister(qos->min_freq.notifiers,  in freq_qos_remove_notifier()
673 		ret = blocking_notifier_chain_unregister(qos->max_freq.notifiers,  in freq_qos_remove_notifier()