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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300301302303304305306307308309310311312313314315316317318319320321322323324325326327328329/* SPDX-License-Identifier: GPL-2.0 *//* * Definitions related to Power Management Quality of Service (PM QoS). * * Copyright (C) 2020 Intel Corporation * * Authors: * Mark Gross <mgross@linux.intel.com> * Rafael J. Wysocki <rafael.j.wysocki@intel.com> */
#ifndef _LINUX_PM_QOS_H#define _LINUX_PM_QOS_H
#include <linux/plist.h>#include <linux/notifier.h>#include <linux/device.h>
enum pm_qos_flags_status { PM_QOS_FLAGS_UNDEFINED = -1, PM_QOS_FLAGS_NONE, PM_QOS_FLAGS_SOME, PM_QOS_FLAGS_ALL,};
#define PM_QOS_DEFAULT_VALUE (-1)#define PM_QOS_LATENCY_ANY S32_MAX#define PM_QOS_LATENCY_ANY_NS ((s64)PM_QOS_LATENCY_ANY * NSEC_PER_USEC)
#define PM_QOS_CPU_LATENCY_DEFAULT_VALUE (2000 * USEC_PER_SEC)#define PM_QOS_RESUME_LATENCY_DEFAULT_VALUE PM_QOS_LATENCY_ANY#define PM_QOS_RESUME_LATENCY_NO_CONSTRAINT PM_QOS_LATENCY_ANY#define PM_QOS_RESUME_LATENCY_NO_CONSTRAINT_NS PM_QOS_LATENCY_ANY_NS#define PM_QOS_LATENCY_TOLERANCE_DEFAULT_VALUE 0#define PM_QOS_MIN_FREQUENCY_DEFAULT_VALUE 0#define PM_QOS_MAX_FREQUENCY_DEFAULT_VALUE FREQ_QOS_MAX_DEFAULT_VALUE#define PM_QOS_LATENCY_TOLERANCE_NO_CONSTRAINT (-1)
#define PM_QOS_FLAG_NO_POWER_OFF (1 << 0)
enum pm_qos_type { PM_QOS_UNITIALIZED, PM_QOS_MAX, /* return the largest value */ PM_QOS_MIN, /* return the smallest value */};
/* * Note: The lockless read path depends on the CPU accessing target_value * or effective_flags atomically. Atomic access is only guaranteed on all CPU * types linux supports for 32 bit quantites */struct pm_qos_constraints { struct plist_head list; s32 target_value; /* Do not change to 64 bit */ s32 default_value; s32 no_constraint_value; enum pm_qos_type type; struct blocking_notifier_head *notifiers;};
struct pm_qos_request { struct plist_node node; struct pm_qos_constraints *qos;};
struct pm_qos_flags_request { struct list_head node; s32 flags; /* Do not change to 64 bit */};
struct pm_qos_flags { struct list_head list; s32 effective_flags; /* Do not change to 64 bit */};
#define FREQ_QOS_MIN_DEFAULT_VALUE 0#define FREQ_QOS_MAX_DEFAULT_VALUE S32_MAX
enum freq_qos_req_type { FREQ_QOS_MIN = 1, FREQ_QOS_MAX,};
struct freq_constraints { struct pm_qos_constraints min_freq; struct blocking_notifier_head min_freq_notifiers; struct pm_qos_constraints max_freq; struct blocking_notifier_head max_freq_notifiers;};
struct freq_qos_request { enum freq_qos_req_type type; struct plist_node pnode; struct freq_constraints *qos;};
enum dev_pm_qos_req_type { DEV_PM_QOS_RESUME_LATENCY = 1, DEV_PM_QOS_LATENCY_TOLERANCE, DEV_PM_QOS_MIN_FREQUENCY, DEV_PM_QOS_MAX_FREQUENCY, DEV_PM_QOS_FLAGS,};
struct dev_pm_qos_request { enum dev_pm_qos_req_type type; union { struct plist_node pnode; struct pm_qos_flags_request flr; struct freq_qos_request freq; } data; struct device *dev;};
struct dev_pm_qos { struct pm_qos_constraints resume_latency; struct pm_qos_constraints latency_tolerance; struct freq_constraints freq; struct pm_qos_flags flags; struct dev_pm_qos_request *resume_latency_req; struct dev_pm_qos_request *latency_tolerance_req; struct dev_pm_qos_request *flags_req;};
/* Action requested to pm_qos_update_target */enum pm_qos_req_action { PM_QOS_ADD_REQ, /* Add a new request */ PM_QOS_UPDATE_REQ, /* Update an existing request */ PM_QOS_REMOVE_REQ /* Remove an existing request */};
static inline int dev_pm_qos_request_active(struct dev_pm_qos_request *req){ return req->dev != NULL;}
s32 pm_qos_read_value(struct pm_qos_constraints *c);int pm_qos_update_target(struct pm_qos_constraints *c, struct plist_node *node, enum pm_qos_req_action action, int value);bool pm_qos_update_flags(struct pm_qos_flags *pqf, struct pm_qos_flags_request *req, enum pm_qos_req_action action, s32 val);
#ifdef CONFIG_CPU_IDLEs32 cpu_latency_qos_limit(void);bool cpu_latency_qos_request_active(struct pm_qos_request *req);void cpu_latency_qos_add_request(struct pm_qos_request *req, s32 value);void cpu_latency_qos_update_request(struct pm_qos_request *req, s32 new_value);void cpu_latency_qos_remove_request(struct pm_qos_request *req);#elsestatic inline s32 cpu_latency_qos_limit(void) { return INT_MAX; }static inline bool cpu_latency_qos_request_active(struct pm_qos_request *req){ return false;}static inline void cpu_latency_qos_add_request(struct pm_qos_request *req, s32 value) {}static inline void cpu_latency_qos_update_request(struct pm_qos_request *req, s32 new_value) {}static inline void cpu_latency_qos_remove_request(struct pm_qos_request *req) {}#endif
#ifdef CONFIG_PM_QOS_CPU_SYSTEM_WAKEUPs32 cpu_wakeup_latency_qos_limit(void);#elsestatic inline s32 cpu_wakeup_latency_qos_limit(void){ return PM_QOS_RESUME_LATENCY_NO_CONSTRAINT;}#endif
#ifdef CONFIG_PMenum pm_qos_flags_status __dev_pm_qos_flags(struct device *dev, s32 mask);enum pm_qos_flags_status dev_pm_qos_flags(struct device *dev, s32 mask);s32 __dev_pm_qos_resume_latency(struct device *dev);s32 dev_pm_qos_read_value(struct device *dev, enum dev_pm_qos_req_type type);int dev_pm_qos_add_request(struct device *dev, struct dev_pm_qos_request *req, enum dev_pm_qos_req_type type, s32 value);int dev_pm_qos_update_request(struct dev_pm_qos_request *req, s32 new_value);int dev_pm_qos_remove_request(struct dev_pm_qos_request *req);int dev_pm_qos_add_notifier(struct device *dev, struct notifier_block *notifier, enum dev_pm_qos_req_type type);int dev_pm_qos_remove_notifier(struct device *dev, struct notifier_block *notifier, enum dev_pm_qos_req_type type);void dev_pm_qos_constraints_init(struct device *dev);void dev_pm_qos_constraints_destroy(struct device *dev);int dev_pm_qos_add_ancestor_request(struct device *dev, struct dev_pm_qos_request *req, enum dev_pm_qos_req_type type, s32 value);int dev_pm_qos_expose_latency_limit(struct device *dev, s32 value);void dev_pm_qos_hide_latency_limit(struct device *dev);int dev_pm_qos_expose_flags(struct device *dev, s32 value);void dev_pm_qos_hide_flags(struct device *dev);int dev_pm_qos_update_flags(struct device *dev, s32 mask, bool set);s32 dev_pm_qos_get_user_latency_tolerance(struct device *dev);int dev_pm_qos_update_user_latency_tolerance(struct device *dev, s32 val);int dev_pm_qos_expose_latency_tolerance(struct device *dev);void dev_pm_qos_hide_latency_tolerance(struct device *dev);
static inline s32 dev_pm_qos_requested_resume_latency(struct device *dev){ return dev->power.qos->resume_latency_req->data.pnode.prio;}
static inline s32 dev_pm_qos_requested_flags(struct device *dev){ return dev->power.qos->flags_req->data.flr.flags;}
static inline s32 dev_pm_qos_raw_resume_latency(struct device *dev){ return IS_ERR_OR_NULL(dev->power.qos) ? PM_QOS_RESUME_LATENCY_NO_CONSTRAINT : pm_qos_read_value(&dev->power.qos->resume_latency);}#elsestatic inline enum pm_qos_flags_status __dev_pm_qos_flags(struct device *dev, s32 mask) { return PM_QOS_FLAGS_UNDEFINED; }static inline enum pm_qos_flags_status dev_pm_qos_flags(struct device *dev, s32 mask) { return PM_QOS_FLAGS_UNDEFINED; }static inline s32 __dev_pm_qos_resume_latency(struct device *dev) { return PM_QOS_RESUME_LATENCY_NO_CONSTRAINT; }static inline s32 dev_pm_qos_read_value(struct device *dev, enum dev_pm_qos_req_type type){ switch (type) { case DEV_PM_QOS_RESUME_LATENCY: return PM_QOS_RESUME_LATENCY_NO_CONSTRAINT; case DEV_PM_QOS_MIN_FREQUENCY: return PM_QOS_MIN_FREQUENCY_DEFAULT_VALUE; case DEV_PM_QOS_MAX_FREQUENCY: return PM_QOS_MAX_FREQUENCY_DEFAULT_VALUE; default: WARN_ON(1); return 0; }}
static inline int dev_pm_qos_add_request(struct device *dev, struct dev_pm_qos_request *req, enum dev_pm_qos_req_type type, s32 value) { return 0; }static inline int dev_pm_qos_update_request(struct dev_pm_qos_request *req, s32 new_value) { return 0; }static inline int dev_pm_qos_remove_request(struct dev_pm_qos_request *req) { return 0; }static inline int dev_pm_qos_add_notifier(struct device *dev, struct notifier_block *notifier, enum dev_pm_qos_req_type type) { return 0; }static inline int dev_pm_qos_remove_notifier(struct device *dev, struct notifier_block *notifier, enum dev_pm_qos_req_type type) { return 0; }static inline void dev_pm_qos_constraints_init(struct device *dev){ dev->power.power_state = PMSG_ON;}static inline void dev_pm_qos_constraints_destroy(struct device *dev){ dev->power.power_state = PMSG_INVALID;}static inline int dev_pm_qos_add_ancestor_request(struct device *dev, struct dev_pm_qos_request *req, enum dev_pm_qos_req_type type, s32 value) { return 0; }static inline int dev_pm_qos_expose_latency_limit(struct device *dev, s32 value) { return 0; }static inline void dev_pm_qos_hide_latency_limit(struct device *dev) {}static inline int dev_pm_qos_expose_flags(struct device *dev, s32 value) { return 0; }static inline void dev_pm_qos_hide_flags(struct device *dev) {}static inline int dev_pm_qos_update_flags(struct device *dev, s32 m, bool set) { return 0; }static inline s32 dev_pm_qos_get_user_latency_tolerance(struct device *dev) { return PM_QOS_LATENCY_TOLERANCE_NO_CONSTRAINT; }static inline int dev_pm_qos_update_user_latency_tolerance(struct device *dev, s32 val) { return 0; }static inline int dev_pm_qos_expose_latency_tolerance(struct device *dev) { return 0; }static inline void dev_pm_qos_hide_latency_tolerance(struct device *dev) {}
static inline s32 dev_pm_qos_requested_resume_latency(struct device *dev){ return PM_QOS_RESUME_LATENCY_NO_CONSTRAINT;}static inline s32 dev_pm_qos_requested_flags(struct device *dev) { return 0; }static inline s32 dev_pm_qos_raw_resume_latency(struct device *dev){ return PM_QOS_RESUME_LATENCY_NO_CONSTRAINT;}#endif
static inline int freq_qos_request_active(struct freq_qos_request *req){ return !IS_ERR_OR_NULL(req->qos);}
void freq_constraints_init(struct freq_constraints *qos);
s32 freq_qos_read_value(struct freq_constraints *qos, enum freq_qos_req_type type);
int freq_qos_add_request(struct freq_constraints *qos, struct freq_qos_request *req, enum freq_qos_req_type type, s32 value);int freq_qos_update_request(struct freq_qos_request *req, s32 new_value);int freq_qos_remove_request(struct freq_qos_request *req);int freq_qos_apply(struct freq_qos_request *req, enum pm_qos_req_action action, s32 value);
int freq_qos_add_notifier(struct freq_constraints *qos, enum freq_qos_req_type type, struct notifier_block *notifier);int freq_qos_remove_notifier(struct freq_constraints *qos, enum freq_qos_req_type type, struct notifier_block *notifier);
#endif