[deliverable/linux.git] / include / linux / pm_qos.h

#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/miscdevice.h>
#include <linux/device.h>
#include <linux/workqueue.h>

enum {
	PM_QOS_RESERVED = 0,
	PM_QOS_CPU_DMA_LATENCY,
	PM_QOS_NETWORK_LATENCY,
	PM_QOS_NETWORK_THROUGHPUT,

	/* 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_CPU_DMA_LAT_DEFAULT_VALUE	(2000 * USEC_PER_SEC)
#define PM_QOS_NETWORK_LAT_DEFAULT_VALUE	(2000 * USEC_PER_SEC)
#define PM_QOS_NETWORK_THROUGHPUT_DEFAULT_VALUE	0
#define PM_QOS_RESUME_LATENCY_DEFAULT_VALUE	0
#define PM_QOS_LATENCY_TOLERANCE_DEFAULT_VALUE	0
#define PM_QOS_LATENCY_TOLERANCE_NO_CONSTRAINT	(-1)
#define PM_QOS_LATENCY_ANY			((s32)(~(__u32)0 >> 1))

#define PM_QOS_FLAG_NO_POWER_OFF	(1 << 0)
#define PM_QOS_FLAG_REMOTE_WAKEUP	(1 << 1)

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_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 */
};

/*
 * 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_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;
}

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_read_value(struct device *dev);
s32 dev_pm_qos_read_value(struct device *dev);
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);
int dev_pm_qos_remove_notifier(struct device *dev,
			       struct notifier_block *notifier);
int dev_pm_qos_add_global_notifier(struct notifier_block *notifier);
int dev_pm_qos_remove_global_notifier(struct notifier_block *notifier);
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);
#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_read_value(struct device *dev)
			{ return 0; }
static inline s32 dev_pm_qos_read_value(struct device *dev)
			{ 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)
			{ return 0; }
static inline int dev_pm_qos_remove_notifier(struct device *dev,
					     struct notifier_block *notifier)
			{ return 0; }
static inline int dev_pm_qos_add_global_notifier(
					struct notifier_block *notifier)
			{ return 0; }
static inline int dev_pm_qos_remove_global_notifier(
					struct notifier_block *notifier)
			{ 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; }
#endif

#ifdef CONFIG_PM_RUNTIME
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);

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;
}
#else
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 s32 dev_pm_qos_requested_resume_latency(struct device *dev) { return 0; }
static inline s32 dev_pm_qos_requested_flags(struct device *dev) { return 0; }
#endif

#endif
Commit	Line	Data
e8db0be1 JP	1	#ifndef _LINUX_PM_QOS_H
e8db0be1 JP	2	#define _LINUX_PM_QOS_H
d82b3518 MG	3	/* interface for the pm_qos_power infrastructure of the linux kernel.
d82b3518 MG	4	*
bf1db69f	5	* Mark Gross <mgross@linux.intel.com>
d82b3518	6	*/
82f68251	7	#include <linux/plist.h>
d82b3518 MG	8	#include <linux/notifier.h>
d82b3518 MG	9	#include <linux/miscdevice.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,
	16	PM_QOS_NETWORK_LATENCY,
	17	PM_QOS_NETWORK_THROUGHPUT,
	18
	19	/* insert new class ID */
	20	PM_QOS_NUM_CLASSES,
	21	};
d82b3518	22
ae0fb4b7 RW	23	enum pm_qos_flags_status {
	24	PM_QOS_FLAGS_UNDEFINED = -1,
	25	PM_QOS_FLAGS_NONE,
	26	PM_QOS_FLAGS_SOME,
	27	PM_QOS_FLAGS_ALL,
	28	};
	29
d82b3518 MG	30	#define PM_QOS_DEFAULT_VALUE -1
d82b3518 MG	31
333c5ae9 TC	32	#define PM_QOS_CPU_DMA_LAT_DEFAULT_VALUE (2000 * USEC_PER_SEC)
	33	#define PM_QOS_NETWORK_LAT_DEFAULT_VALUE (2000 * USEC_PER_SEC)
	34	#define PM_QOS_NETWORK_THROUGHPUT_DEFAULT_VALUE 0
b02f6695	35	#define PM_QOS_RESUME_LATENCY_DEFAULT_VALUE 0
2d984ad1 RW	36	#define PM_QOS_LATENCY_TOLERANCE_DEFAULT_VALUE 0
	37	#define PM_QOS_LATENCY_TOLERANCE_NO_CONSTRAINT (-1)
	38	#define PM_QOS_LATENCY_ANY ((s32)(~(__u32)0 >> 1))
333c5ae9	39
e39473d0 RW	40	#define PM_QOS_FLAG_NO_POWER_OFF (1 << 0)
	41	#define PM_QOS_FLAG_REMOTE_WAKEUP (1 << 1)
	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,
ae0fb4b7 RW	57	DEV_PM_QOS_FLAGS,
	58	};
	59
91ff4cb8	60	struct dev_pm_qos_request {
ae0fb4b7	61	enum dev_pm_qos_req_type type;
021c870b RW	62	union {
021c870b RW	63	struct plist_node pnode;
ae0fb4b7	64	struct pm_qos_flags_request flr;
021c870b	65	} data;
91ff4cb8 JP	66	struct device *dev;
	67	};
	68
4e1779ba JP	69	enum pm_qos_type {
	70	PM_QOS_UNITIALIZED,
	71	PM_QOS_MAX, /* return the largest value */
	72	PM_QOS_MIN /* return the smallest value */
	73	};
	74
	75	/*
5efbe427 RW	76	* Note: The lockless read path depends on the CPU accessing target_value
5efbe427 RW	77	* or effective_flags atomically. Atomic access is only guaranteed on all CPU
4e1779ba JP	78	* types linux supports for 32 bit quantites
	79	*/
	80	struct pm_qos_constraints {
	81	struct plist_head list;
	82	s32 target_value; /* Do not change to 64 bit */
	83	s32 default_value;
327adaed	84	s32 no_constraint_value;
4e1779ba JP	85	enum pm_qos_type type;
	86	struct blocking_notifier_head *notifiers;
	87	};
	88
5efbe427 RW	89	struct pm_qos_flags {
	90	struct list_head list;
	91	s32 effective_flags; /* Do not change to 64 bit */
	92	};
	93
5f986c59	94	struct dev_pm_qos {
b02f6695	95	struct pm_qos_constraints resume_latency;
2d984ad1	96	struct pm_qos_constraints latency_tolerance;
ae0fb4b7	97	struct pm_qos_flags flags;
b02f6695	98	struct dev_pm_qos_request *resume_latency_req;
2d984ad1	99	struct dev_pm_qos_request *latency_tolerance_req;
e39473d0	100	struct dev_pm_qos_request *flags_req;
5f986c59 RW	101	};
5f986c59 RW	102
abe98ec2 JP	103	/* Action requested to pm_qos_update_target */
	104	enum pm_qos_req_action {
	105	PM_QOS_ADD_REQ, /* Add a new request */
	106	PM_QOS_UPDATE_REQ, /* Update an existing request */
	107	PM_QOS_REMOVE_REQ /* Remove an existing request */
	108	};
	109
91ff4cb8 JP	110	static inline int dev_pm_qos_request_active(struct dev_pm_qos_request *req)
91ff4cb8 JP	111	{
83618092	112	return req->dev != NULL;
91ff4cb8 JP	113	}
91ff4cb8 JP	114
abe98ec2 JP	115	int pm_qos_update_target(struct pm_qos_constraints c, struct plist_node node,
abe98ec2 JP	116	enum pm_qos_req_action action, int value);
5efbe427 RW	117	bool pm_qos_update_flags(struct pm_qos_flags *pqf,
	118	struct pm_qos_flags_request *req,
	119	enum pm_qos_req_action action, s32 val);
cc749986 JP	120	void pm_qos_add_request(struct pm_qos_request *req, int pm_qos_class,
	121	s32 value);
	122	void pm_qos_update_request(struct pm_qos_request *req,
e8db0be1	123	s32 new_value);
c4772d19 MH	124	void pm_qos_update_request_timeout(struct pm_qos_request *req,
c4772d19 MH	125	s32 new_value, unsigned long timeout_us);
cc749986	126	void pm_qos_remove_request(struct pm_qos_request *req);
d82b3518	127
ed77134b MG	128	int pm_qos_request(int pm_qos_class);
	129	int pm_qos_add_notifier(int pm_qos_class, struct notifier_block *notifier);
	130	int pm_qos_remove_notifier(int pm_qos_class, struct notifier_block *notifier);
cc749986	131	int pm_qos_request_active(struct pm_qos_request *req);
b66213cd	132	s32 pm_qos_read_value(struct pm_qos_constraints *c);
91ff4cb8	133
a9b542ee	134	#ifdef CONFIG_PM
ae0fb4b7 RW	135	enum pm_qos_flags_status __dev_pm_qos_flags(struct device *dev, s32 mask);
ae0fb4b7 RW	136	enum pm_qos_flags_status dev_pm_qos_flags(struct device *dev, s32 mask);
00dc9ad1	137	s32 __dev_pm_qos_read_value(struct device *dev);
1a9a9152	138	s32 dev_pm_qos_read_value(struct device *dev);
91ff4cb8	139	int dev_pm_qos_add_request(struct device dev, struct dev_pm_qos_request req,
ae0fb4b7	140	enum dev_pm_qos_req_type type, s32 value);
91ff4cb8 JP	141	int dev_pm_qos_update_request(struct dev_pm_qos_request *req, s32 new_value);
	142	int dev_pm_qos_remove_request(struct dev_pm_qos_request *req);
	143	int dev_pm_qos_add_notifier(struct device *dev,
	144	struct notifier_block *notifier);
	145	int dev_pm_qos_remove_notifier(struct device *dev,
	146	struct notifier_block *notifier);
b66213cd JP	147	int dev_pm_qos_add_global_notifier(struct notifier_block *notifier);
b66213cd JP	148	int dev_pm_qos_remove_global_notifier(struct notifier_block *notifier);
91ff4cb8 JP	149	void dev_pm_qos_constraints_init(struct device *dev);
91ff4cb8 JP	150	void dev_pm_qos_constraints_destroy(struct device *dev);
40a5f8be	151	int dev_pm_qos_add_ancestor_request(struct device *dev,
71d821fd RW	152	struct dev_pm_qos_request *req,
71d821fd RW	153	enum dev_pm_qos_req_type type, s32 value);
e8db0be1	154	#else
ae0fb4b7 RW	155	static inline enum pm_qos_flags_status __dev_pm_qos_flags(struct device *dev,
	156	s32 mask)
	157	{ return PM_QOS_FLAGS_UNDEFINED; }
	158	static inline enum pm_qos_flags_status dev_pm_qos_flags(struct device *dev,
	159	s32 mask)
	160	{ return PM_QOS_FLAGS_UNDEFINED; }
00dc9ad1 RW	161	static inline s32 __dev_pm_qos_read_value(struct device *dev)
00dc9ad1 RW	162	{ return 0; }
1a9a9152 RW	163	static inline s32 dev_pm_qos_read_value(struct device *dev)
1a9a9152 RW	164	{ return 0; }
91ff4cb8 JP	165	static inline int dev_pm_qos_add_request(struct device *dev,
91ff4cb8 JP	166	struct dev_pm_qos_request *req,
ae0fb4b7	167	enum dev_pm_qos_req_type type,
91ff4cb8 JP	168	s32 value)
	169	{ return 0; }
	170	static inline int dev_pm_qos_update_request(struct dev_pm_qos_request *req,
	171	s32 new_value)
	172	{ return 0; }
	173	static inline int dev_pm_qos_remove_request(struct dev_pm_qos_request *req)
	174	{ return 0; }
	175	static inline int dev_pm_qos_add_notifier(struct device *dev,
	176	struct notifier_block *notifier)
	177	{ return 0; }
	178	static inline int dev_pm_qos_remove_notifier(struct device *dev,
	179	struct notifier_block *notifier)
	180	{ return 0; }
b66213cd JP	181	static inline int dev_pm_qos_add_global_notifier(
	182	struct notifier_block *notifier)
	183	{ return 0; }
	184	static inline int dev_pm_qos_remove_global_notifier(
	185	struct notifier_block *notifier)
	186	{ return 0; }
91ff4cb8	187	static inline void dev_pm_qos_constraints_init(struct device *dev)
1a9a9152 RW	188	{
	189	dev->power.power_state = PMSG_ON;
	190	}
91ff4cb8	191	static inline void dev_pm_qos_constraints_destroy(struct device *dev)
1a9a9152 RW	192	{
	193	dev->power.power_state = PMSG_INVALID;
	194	}
40a5f8be	195	static inline int dev_pm_qos_add_ancestor_request(struct device *dev,
71d821fd RW	196	struct dev_pm_qos_request *req,
	197	enum dev_pm_qos_req_type type,
	198	s32 value)
40a5f8be	199	{ return 0; }
e8db0be1	200	#endif
d82b3518	201
85dc0b8a RW	202	#ifdef CONFIG_PM_RUNTIME
	203	int dev_pm_qos_expose_latency_limit(struct device *dev, s32 value);
	204	void dev_pm_qos_hide_latency_limit(struct device *dev);
e39473d0 RW	205	int dev_pm_qos_expose_flags(struct device *dev, s32 value);
	206	void dev_pm_qos_hide_flags(struct device *dev);
	207	int dev_pm_qos_update_flags(struct device *dev, s32 mask, bool set);
2d984ad1 RW	208	s32 dev_pm_qos_get_user_latency_tolerance(struct device *dev);
2d984ad1 RW	209	int dev_pm_qos_update_user_latency_tolerance(struct device *dev, s32 val);
e39473d0	210
b02f6695	211	static inline s32 dev_pm_qos_requested_resume_latency(struct device *dev)
e39473d0	212	{
b02f6695	213	return dev->power.qos->resume_latency_req->data.pnode.prio;
e39473d0 RW	214	}
	215
	216	static inline s32 dev_pm_qos_requested_flags(struct device *dev)
	217	{
	218	return dev->power.qos->flags_req->data.flr.flags;
	219	}
85dc0b8a RW	220	#else
	221	static inline int dev_pm_qos_expose_latency_limit(struct device *dev, s32 value)
	222	{ return 0; }
	223	static inline void dev_pm_qos_hide_latency_limit(struct device *dev) {}
e39473d0 RW	224	static inline int dev_pm_qos_expose_flags(struct device *dev, s32 value)
	225	{ return 0; }
	226	static inline void dev_pm_qos_hide_flags(struct device *dev) {}
	227	static inline int dev_pm_qos_update_flags(struct device *dev, s32 m, bool set)
	228	{ return 0; }
2d984ad1 RW	229	static inline s32 dev_pm_qos_get_user_latency_tolerance(struct device *dev)
	230	{ return PM_QOS_LATENCY_TOLERANCE_NO_CONSTRAINT; }
	231	static inline int dev_pm_qos_update_user_latency_tolerance(struct device *dev, s32 val)
	232	{ return 0; }
e39473d0	233
b02f6695	234	static inline s32 dev_pm_qos_requested_resume_latency(struct device *dev) { return 0; }
e39473d0	235	static inline s32 dev_pm_qos_requested_flags(struct device *dev) { return 0; }
85dc0b8a RW	236	#endif
85dc0b8a RW	237
82f68251	238	#endif