[linux-2.6-block.git] / include / linux / pm_qos.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LINUX_PM_QOS_H
#define _LINUX_PM_QOS_H
/* interface for the pm_qos_power infrastructure of the linux kernel.
 *
 * Mark Gross <mgross@linux.intel.com>
 */
#include <linux/plist.h>
#include <linux/notifier.h>
#include <linux/device.h>
#include <linux/workqueue.h>

enum {
	PM_QOS_RESERVED = 0,
	PM_QOS_CPU_DMA_LATENCY,

	/* insert new class ID */
	PM_QOS_NUM_CLASSES,
};

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_DMA_LAT_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	(-1)
#define PM_QOS_LATENCY_TOLERANCE_NO_CONSTRAINT	(-1)

#define PM_QOS_FLAG_NO_POWER_OFF	(1 << 0)

struct pm_qos_request {
	struct plist_node node;
	int pm_qos_class;
	struct delayed_work work; /* for pm_qos_update_request_timeout */
};

struct pm_qos_flags_request {
	struct list_head node;
	s32 flags;	/* Do not change to 64 bit */
};

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;
	} data;
	struct device *dev;
};

enum pm_qos_type {
	PM_QOS_UNITIALIZED,
	PM_QOS_MAX,		/* return the largest value */
	PM_QOS_MIN,		/* return the smallest value */
	PM_QOS_SUM		/* return the sum */
};

/*
 * 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_flags {
	struct list_head list;
	s32 effective_flags;	/* Do not change to 64 bit */
};

struct dev_pm_qos {
	struct pm_qos_constraints resume_latency;
	struct pm_qos_constraints latency_tolerance;
	struct pm_qos_constraints min_frequency;
	struct pm_qos_constraints max_frequency;
	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;
	struct dev_pm_qos_request *min_frequency_req;
	struct dev_pm_qos_request *max_frequency_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;
}

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);
void pm_qos_add_request(struct pm_qos_request *req, int pm_qos_class,
			s32 value);
void pm_qos_update_request(struct pm_qos_request *req,
			   s32 new_value);
void pm_qos_update_request_timeout(struct pm_qos_request *req,
				   s32 new_value, unsigned long timeout_us);
void pm_qos_remove_request(struct pm_qos_request *req);

int pm_qos_request(int pm_qos_class);
int pm_qos_add_notifier(int pm_qos_class, struct notifier_block *notifier);
int pm_qos_remove_notifier(int pm_qos_class, struct notifier_block *notifier);
int pm_qos_request_active(struct pm_qos_request *req);
s32 pm_qos_read_value(struct pm_qos_constraints *c);

#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

#define FREQ_QOS_MIN_DEFAULT_VALUE	0
#define FREQ_QOS_MAX_DEFAULT_VALUE	(-1)

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;
};

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_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
Commit	Line	Data
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
e8db0be1 JP	2	#ifndef _LINUX_PM_QOS_H
e8db0be1 JP	3	#define _LINUX_PM_QOS_H
d82b3518 MG	4	/* interface for the pm_qos_power infrastructure of the linux kernel.
d82b3518 MG	5	*
bf1db69f	6	* Mark Gross <mgross@linux.intel.com>
d82b3518	7	*/
82f68251	8	#include <linux/plist.h>
d82b3518	9	#include <linux/notifier.h>
1a9a9152	10	#include <linux/device.h>
c4772d19	11	#include <linux/workqueue.h>
d82b3518	12
d031e1de AF	13	enum {
	14	PM_QOS_RESERVED = 0,
	15	PM_QOS_CPU_DMA_LATENCY,
d031e1de AF	16
	17	/* insert new class ID */
	18	PM_QOS_NUM_CLASSES,
	19	};
d82b3518	20
ae0fb4b7 RW	21	enum pm_qos_flags_status {
	22	PM_QOS_FLAGS_UNDEFINED = -1,
	23	PM_QOS_FLAGS_NONE,
	24	PM_QOS_FLAGS_SOME,
	25	PM_QOS_FLAGS_ALL,
	26	};
	27
0759e80b RW	28	#define PM_QOS_DEFAULT_VALUE (-1)
	29	#define PM_QOS_LATENCY_ANY S32_MAX
	30	#define PM_QOS_LATENCY_ANY_NS ((s64)PM_QOS_LATENCY_ANY * NSEC_PER_USEC)
d82b3518	31
333c5ae9	32	#define PM_QOS_CPU_DMA_LAT_DEFAULT_VALUE (2000 * USEC_PER_SEC)
0759e80b RW	33	#define PM_QOS_RESUME_LATENCY_DEFAULT_VALUE PM_QOS_LATENCY_ANY
	34	#define PM_QOS_RESUME_LATENCY_NO_CONSTRAINT PM_QOS_LATENCY_ANY
	35	#define PM_QOS_RESUME_LATENCY_NO_CONSTRAINT_NS PM_QOS_LATENCY_ANY_NS
2d984ad1	36	#define PM_QOS_LATENCY_TOLERANCE_DEFAULT_VALUE 0
208637b3 VK	37	#define PM_QOS_MIN_FREQUENCY_DEFAULT_VALUE 0
208637b3 VK	38	#define PM_QOS_MAX_FREQUENCY_DEFAULT_VALUE (-1)
2d984ad1	39	#define PM_QOS_LATENCY_TOLERANCE_NO_CONSTRAINT (-1)
333c5ae9	40
e39473d0	41	#define PM_QOS_FLAG_NO_POWER_OFF (1 << 0)
e39473d0	42
cc749986 JP	43	struct pm_qos_request {
cc749986 JP	44	struct plist_node node;
82f68251	45	int pm_qos_class;
c4772d19	46	struct delayed_work work; /* for pm_qos_update_request_timeout */
82f68251	47	};
d82b3518	48
5efbe427 RW	49	struct pm_qos_flags_request {
	50	struct list_head node;
	51	s32 flags; /* Do not change to 64 bit */
	52	};
	53
ae0fb4b7	54	enum dev_pm_qos_req_type {
b02f6695	55	DEV_PM_QOS_RESUME_LATENCY = 1,
2d984ad1	56	DEV_PM_QOS_LATENCY_TOLERANCE,
208637b3 VK	57	DEV_PM_QOS_MIN_FREQUENCY,
208637b3 VK	58	DEV_PM_QOS_MAX_FREQUENCY,
ae0fb4b7 RW	59	DEV_PM_QOS_FLAGS,
	60	};
	61
91ff4cb8	62	struct dev_pm_qos_request {
ae0fb4b7	63	enum dev_pm_qos_req_type type;
021c870b RW	64	union {
021c870b RW	65	struct plist_node pnode;
ae0fb4b7	66	struct pm_qos_flags_request flr;
021c870b	67	} data;
91ff4cb8 JP	68	struct device *dev;
	69	};
	70
4e1779ba JP	71	enum pm_qos_type {
	72	PM_QOS_UNITIALIZED,
	73	PM_QOS_MAX, /* return the largest value */
7990da71 TV	74	PM_QOS_MIN, /* return the smallest value */
7990da71 TV	75	PM_QOS_SUM /* return the sum */
4e1779ba JP	76	};
	77
	78	/*
5efbe427 RW	79	* Note: The lockless read path depends on the CPU accessing target_value
5efbe427 RW	80	* or effective_flags atomically. Atomic access is only guaranteed on all CPU
4e1779ba JP	81	* types linux supports for 32 bit quantites
	82	*/
	83	struct pm_qos_constraints {
	84	struct plist_head list;
	85	s32 target_value; /* Do not change to 64 bit */
	86	s32 default_value;
327adaed	87	s32 no_constraint_value;
4e1779ba JP	88	enum pm_qos_type type;
	89	struct blocking_notifier_head *notifiers;
	90	};
	91
5efbe427 RW	92	struct pm_qos_flags {
	93	struct list_head list;
	94	s32 effective_flags; /* Do not change to 64 bit */
	95	};
	96
5f986c59	97	struct dev_pm_qos {
b02f6695	98	struct pm_qos_constraints resume_latency;
2d984ad1	99	struct pm_qos_constraints latency_tolerance;
208637b3 VK	100	struct pm_qos_constraints min_frequency;
208637b3 VK	101	struct pm_qos_constraints max_frequency;
ae0fb4b7	102	struct pm_qos_flags flags;
b02f6695	103	struct dev_pm_qos_request *resume_latency_req;
2d984ad1	104	struct dev_pm_qos_request *latency_tolerance_req;
e39473d0	105	struct dev_pm_qos_request *flags_req;
208637b3 VK	106	struct dev_pm_qos_request *min_frequency_req;
208637b3 VK	107	struct dev_pm_qos_request *max_frequency_req;
5f986c59 RW	108	};
5f986c59 RW	109
abe98ec2 JP	110	/* Action requested to pm_qos_update_target */
	111	enum pm_qos_req_action {
	112	PM_QOS_ADD_REQ, /* Add a new request */
	113	PM_QOS_UPDATE_REQ, /* Update an existing request */
	114	PM_QOS_REMOVE_REQ /* Remove an existing request */
	115	};
	116
91ff4cb8 JP	117	static inline int dev_pm_qos_request_active(struct dev_pm_qos_request *req)
91ff4cb8 JP	118	{
83618092	119	return req->dev != NULL;
91ff4cb8 JP	120	}
91ff4cb8 JP	121
abe98ec2 JP	122	int pm_qos_update_target(struct pm_qos_constraints c, struct plist_node node,
abe98ec2 JP	123	enum pm_qos_req_action action, int value);
5efbe427 RW	124	bool pm_qos_update_flags(struct pm_qos_flags *pqf,
	125	struct pm_qos_flags_request *req,
	126	enum pm_qos_req_action action, s32 val);
cc749986 JP	127	void pm_qos_add_request(struct pm_qos_request *req, int pm_qos_class,
	128	s32 value);
	129	void pm_qos_update_request(struct pm_qos_request *req,
e8db0be1	130	s32 new_value);
c4772d19 MH	131	void pm_qos_update_request_timeout(struct pm_qos_request *req,
c4772d19 MH	132	s32 new_value, unsigned long timeout_us);
cc749986	133	void pm_qos_remove_request(struct pm_qos_request *req);
d82b3518	134
ed77134b MG	135	int pm_qos_request(int pm_qos_class);
	136	int pm_qos_add_notifier(int pm_qos_class, struct notifier_block *notifier);
	137	int pm_qos_remove_notifier(int pm_qos_class, struct notifier_block *notifier);
cc749986	138	int pm_qos_request_active(struct pm_qos_request *req);
b66213cd	139	s32 pm_qos_read_value(struct pm_qos_constraints *c);
91ff4cb8	140
a9b542ee	141	#ifdef CONFIG_PM
ae0fb4b7 RW	142	enum pm_qos_flags_status __dev_pm_qos_flags(struct device *dev, s32 mask);
ae0fb4b7 RW	143	enum pm_qos_flags_status dev_pm_qos_flags(struct device *dev, s32 mask);
8262331e	144	s32 __dev_pm_qos_resume_latency(struct device *dev);
2a79ea5e	145	s32 dev_pm_qos_read_value(struct device *dev, enum dev_pm_qos_req_type type);
91ff4cb8	146	int dev_pm_qos_add_request(struct device dev, struct dev_pm_qos_request req,
ae0fb4b7	147	enum dev_pm_qos_req_type type, s32 value);
91ff4cb8 JP	148	int dev_pm_qos_update_request(struct dev_pm_qos_request *req, s32 new_value);
	149	int dev_pm_qos_remove_request(struct dev_pm_qos_request *req);
	150	int dev_pm_qos_add_notifier(struct device *dev,
0b07ee94 VK	151	struct notifier_block *notifier,
0b07ee94 VK	152	enum dev_pm_qos_req_type type);
91ff4cb8	153	int dev_pm_qos_remove_notifier(struct device *dev,
0b07ee94 VK	154	struct notifier_block *notifier,
0b07ee94 VK	155	enum dev_pm_qos_req_type type);
91ff4cb8 JP	156	void dev_pm_qos_constraints_init(struct device *dev);
91ff4cb8 JP	157	void dev_pm_qos_constraints_destroy(struct device *dev);
40a5f8be	158	int dev_pm_qos_add_ancestor_request(struct device *dev,
71d821fd RW	159	struct dev_pm_qos_request *req,
71d821fd RW	160	enum dev_pm_qos_req_type type, s32 value);
d30d819d RW	161	int dev_pm_qos_expose_latency_limit(struct device *dev, s32 value);
	162	void dev_pm_qos_hide_latency_limit(struct device *dev);
	163	int dev_pm_qos_expose_flags(struct device *dev, s32 value);
	164	void dev_pm_qos_hide_flags(struct device *dev);
	165	int dev_pm_qos_update_flags(struct device *dev, s32 mask, bool set);
	166	s32 dev_pm_qos_get_user_latency_tolerance(struct device *dev);
	167	int dev_pm_qos_update_user_latency_tolerance(struct device *dev, s32 val);
13b2c4a0 MW	168	int dev_pm_qos_expose_latency_tolerance(struct device *dev);
13b2c4a0 MW	169	void dev_pm_qos_hide_latency_tolerance(struct device *dev);
d30d819d RW	170
	171	static inline s32 dev_pm_qos_requested_resume_latency(struct device *dev)
	172	{
	173	return dev->power.qos->resume_latency_req->data.pnode.prio;
	174	}
	175
	176	static inline s32 dev_pm_qos_requested_flags(struct device *dev)
	177	{
	178	return dev->power.qos->flags_req->data.flr.flags;
	179	}
6dbf5cea	180
8262331e	181	static inline s32 dev_pm_qos_raw_resume_latency(struct device *dev)
6dbf5cea RW	182	{
6dbf5cea RW	183	return IS_ERR_OR_NULL(dev->power.qos) ?
0759e80b RW	184	PM_QOS_RESUME_LATENCY_NO_CONSTRAINT :
0759e80b RW	185	pm_qos_read_value(&dev->power.qos->resume_latency);
6dbf5cea	186	}
e8db0be1	187	#else
ae0fb4b7 RW	188	static inline enum pm_qos_flags_status __dev_pm_qos_flags(struct device *dev,
	189	s32 mask)
	190	{ return PM_QOS_FLAGS_UNDEFINED; }
	191	static inline enum pm_qos_flags_status dev_pm_qos_flags(struct device *dev,
	192	s32 mask)
	193	{ return PM_QOS_FLAGS_UNDEFINED; }
8262331e	194	static inline s32 __dev_pm_qos_resume_latency(struct device *dev)
0759e80b	195	{ return PM_QOS_RESUME_LATENCY_NO_CONSTRAINT; }
2a79ea5e VK	196	static inline s32 dev_pm_qos_read_value(struct device *dev,
	197	enum dev_pm_qos_req_type type)
	198	{
	199	switch (type) {
	200	case DEV_PM_QOS_RESUME_LATENCY:
	201	return PM_QOS_RESUME_LATENCY_NO_CONSTRAINT;
208637b3 VK	202	case DEV_PM_QOS_MIN_FREQUENCY:
	203	return PM_QOS_MIN_FREQUENCY_DEFAULT_VALUE;
	204	case DEV_PM_QOS_MAX_FREQUENCY:
	205	return PM_QOS_MAX_FREQUENCY_DEFAULT_VALUE;
2a79ea5e VK	206	default:
	207	WARN_ON(1);
	208	return 0;
	209	}
	210	}
	211
91ff4cb8 JP	212	static inline int dev_pm_qos_add_request(struct device *dev,
91ff4cb8 JP	213	struct dev_pm_qos_request *req,
ae0fb4b7	214	enum dev_pm_qos_req_type type,
91ff4cb8 JP	215	s32 value)
	216	{ return 0; }
	217	static inline int dev_pm_qos_update_request(struct dev_pm_qos_request *req,
	218	s32 new_value)
	219	{ return 0; }
	220	static inline int dev_pm_qos_remove_request(struct dev_pm_qos_request *req)
	221	{ return 0; }
	222	static inline int dev_pm_qos_add_notifier(struct device *dev,
0b07ee94 VK	223	struct notifier_block *notifier,
0b07ee94 VK	224	enum dev_pm_qos_req_type type)
91ff4cb8 JP	225	{ return 0; }
91ff4cb8 JP	226	static inline int dev_pm_qos_remove_notifier(struct device *dev,
0b07ee94 VK	227	struct notifier_block *notifier,
0b07ee94 VK	228	enum dev_pm_qos_req_type type)
91ff4cb8 JP	229	{ return 0; }
91ff4cb8 JP	230	static inline void dev_pm_qos_constraints_init(struct device *dev)
1a9a9152 RW	231	{
	232	dev->power.power_state = PMSG_ON;
	233	}
91ff4cb8	234	static inline void dev_pm_qos_constraints_destroy(struct device *dev)
1a9a9152 RW	235	{
	236	dev->power.power_state = PMSG_INVALID;
	237	}
40a5f8be	238	static inline int dev_pm_qos_add_ancestor_request(struct device *dev,
71d821fd RW	239	struct dev_pm_qos_request *req,
	240	enum dev_pm_qos_req_type type,
	241	s32 value)
40a5f8be	242	{ return 0; }
85dc0b8a RW	243	static inline int dev_pm_qos_expose_latency_limit(struct device *dev, s32 value)
	244	{ return 0; }
	245	static inline void dev_pm_qos_hide_latency_limit(struct device *dev) {}
e39473d0 RW	246	static inline int dev_pm_qos_expose_flags(struct device *dev, s32 value)
	247	{ return 0; }
	248	static inline void dev_pm_qos_hide_flags(struct device *dev) {}
	249	static inline int dev_pm_qos_update_flags(struct device *dev, s32 m, bool set)
	250	{ return 0; }
2d984ad1 RW	251	static inline s32 dev_pm_qos_get_user_latency_tolerance(struct device *dev)
	252	{ return PM_QOS_LATENCY_TOLERANCE_NO_CONSTRAINT; }
	253	static inline int dev_pm_qos_update_user_latency_tolerance(struct device *dev, s32 val)
	254	{ return 0; }
13b2c4a0 MW	255	static inline int dev_pm_qos_expose_latency_tolerance(struct device *dev)
	256	{ return 0; }
	257	static inline void dev_pm_qos_hide_latency_tolerance(struct device *dev) {}
e39473d0	258
0759e80b RW	259	static inline s32 dev_pm_qos_requested_resume_latency(struct device *dev)
	260	{
	261	return PM_QOS_RESUME_LATENCY_NO_CONSTRAINT;
	262	}
e39473d0	263	static inline s32 dev_pm_qos_requested_flags(struct device *dev) { return 0; }
8262331e	264	static inline s32 dev_pm_qos_raw_resume_latency(struct device *dev)
0759e80b RW	265	{
	266	return PM_QOS_RESUME_LATENCY_NO_CONSTRAINT;
	267	}
85dc0b8a RW	268	#endif
85dc0b8a RW	269
77751a46 RW	270	#define FREQ_QOS_MIN_DEFAULT_VALUE 0
	271	#define FREQ_QOS_MAX_DEFAULT_VALUE (-1)
	272
	273	enum freq_qos_req_type {
	274	FREQ_QOS_MIN = 1,
	275	FREQ_QOS_MAX,
	276	};
	277
	278	struct freq_constraints {
	279	struct pm_qos_constraints min_freq;
	280	struct blocking_notifier_head min_freq_notifiers;
	281	struct pm_qos_constraints max_freq;
	282	struct blocking_notifier_head max_freq_notifiers;
	283	};
	284
	285	struct freq_qos_request {
	286	enum freq_qos_req_type type;
	287	struct plist_node pnode;
	288	struct freq_constraints *qos;
	289	};
	290
	291	static inline int freq_qos_request_active(struct freq_qos_request *req)
	292	{
	293	return !IS_ERR_OR_NULL(req->qos);
	294	}
	295
	296	void freq_constraints_init(struct freq_constraints *qos);
	297
	298	s32 freq_qos_read_value(struct freq_constraints *qos,
	299	enum freq_qos_req_type type);
	300
	301	int freq_qos_add_request(struct freq_constraints *qos,
	302	struct freq_qos_request *req,
	303	enum freq_qos_req_type type, s32 value);
	304	int freq_qos_update_request(struct freq_qos_request *req, s32 new_value);
	305	int freq_qos_remove_request(struct freq_qos_request *req);
	306
	307	int freq_qos_add_notifier(struct freq_constraints *qos,
	308	enum freq_qos_req_type type,
	309	struct notifier_block *notifier);
	310	int freq_qos_remove_notifier(struct freq_constraints *qos,
	311	enum freq_qos_req_type type,
	312	struct notifier_block *notifier);
	313
82f68251	314	#endif