include/linux/pm_qos.h - third_party/kernel - Git at Google


            
            /* 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_IDLE

            
            s32 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);

            
            #else

            
            static 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

            
            enum 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);

            
            }

            
            #else

            
            static 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
	/* 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_IDLE
	s32 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);
	#else
	static 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
	enum 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);
	}
	#else
	static 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