[mirror_ubuntu-bionic-kernel.git] / include / linux / pm_domain.h

/*
 * pm_domain.h - Definitions and headers related to device power domains.
 *
 * Copyright (C) 2011 Rafael J. Wysocki <rjw@sisk.pl>, Renesas Electronics Corp.
 *
 * This file is released under the GPLv2.
 */

#ifndef _LINUX_PM_DOMAIN_H
#define _LINUX_PM_DOMAIN_H

#include <linux/device.h>

enum gpd_status {
	GPD_STATE_ACTIVE = 0,	/* PM domain is active */
	GPD_STATE_WAIT_MASTER,	/* PM domain's master is being waited for */
	GPD_STATE_BUSY,		/* Something is happening to the PM domain */
	GPD_STATE_REPEAT,	/* Power off in progress, to be repeated */
	GPD_STATE_POWER_OFF,	/* PM domain is off */
};

struct dev_power_governor {
	bool (*power_down_ok)(struct dev_pm_domain *domain);
	bool (*stop_ok)(struct device *dev);
};

struct gpd_dev_ops {
	int (*start)(struct device *dev);
	int (*stop)(struct device *dev);
	int (*save_state)(struct device *dev);
	int (*restore_state)(struct device *dev);
	int (*suspend)(struct device *dev);
	int (*suspend_late)(struct device *dev);
	int (*resume_early)(struct device *dev);
	int (*resume)(struct device *dev);
	int (*freeze)(struct device *dev);
	int (*freeze_late)(struct device *dev);
	int (*thaw_early)(struct device *dev);
	int (*thaw)(struct device *dev);
	bool (*active_wakeup)(struct device *dev);
};

struct generic_pm_domain {
	struct dev_pm_domain domain;	/* PM domain operations */
	struct list_head gpd_list_node;	/* Node in the global PM domains list */
	struct list_head master_links;	/* Links with PM domain as a master */
	struct list_head slave_links;	/* Links with PM domain as a slave */
	struct list_head dev_list;	/* List of devices */
	struct mutex lock;
	struct dev_power_governor *gov;
	struct work_struct power_off_work;
	unsigned int in_progress;	/* Number of devices being suspended now */
	atomic_t sd_count;	/* Number of subdomains with power "on" */
	enum gpd_status status;	/* Current state of the domain */
	wait_queue_head_t status_wait_queue;
	struct task_struct *poweroff_task;	/* Powering off task */
	unsigned int resume_count;	/* Number of devices being resumed */
	unsigned int device_count;	/* Number of devices */
	unsigned int suspended_count;	/* System suspend device counter */
	unsigned int prepared_count;	/* Suspend counter of prepared devices */
	bool suspend_power_off;	/* Power status before system suspend */
	bool dev_irq_safe;	/* Device callbacks are IRQ-safe */
	int (*power_off)(struct generic_pm_domain *domain);
	int (*power_on)(struct generic_pm_domain *domain);
	struct gpd_dev_ops dev_ops;
};

static inline struct generic_pm_domain *pd_to_genpd(struct dev_pm_domain *pd)
{
	return container_of(pd, struct generic_pm_domain, domain);
}

struct gpd_link {
	struct generic_pm_domain *master;
	struct list_head master_node;
	struct generic_pm_domain *slave;
	struct list_head slave_node;
};

struct gpd_timing_data {
	s64 stop_latency_ns;
	s64 start_latency_ns;
	s64 break_even_ns;
};

struct generic_pm_domain_data {
	struct pm_domain_data base;
	struct gpd_dev_ops ops;
	struct gpd_timing_data td;
	bool need_restore;
};

static inline struct generic_pm_domain_data *to_gpd_data(struct pm_domain_data *pdd)
{
	return container_of(pdd, struct generic_pm_domain_data, base);
}

#ifdef CONFIG_PM_GENERIC_DOMAINS
static inline struct generic_pm_domain_data *dev_gpd_data(struct device *dev)
{
	return to_gpd_data(dev->power.subsys_data->domain_data);
}

extern struct dev_power_governor simple_qos_governor;

extern struct generic_pm_domain *dev_to_genpd(struct device *dev);
extern int __pm_genpd_add_device(struct generic_pm_domain *genpd,
				 struct device *dev,
				 struct gpd_timing_data *td);

static inline int pm_genpd_add_device(struct generic_pm_domain *genpd,
				      struct device *dev)
{
	return __pm_genpd_add_device(genpd, dev, NULL);
}

extern int pm_genpd_remove_device(struct generic_pm_domain *genpd,
				  struct device *dev);
extern int pm_genpd_add_subdomain(struct generic_pm_domain *genpd,
				  struct generic_pm_domain *new_subdomain);
extern int pm_genpd_remove_subdomain(struct generic_pm_domain *genpd,
				     struct generic_pm_domain *target);
extern int pm_genpd_add_callbacks(struct device *dev,
				  struct gpd_dev_ops *ops,
				  struct gpd_timing_data *td);
extern int __pm_genpd_remove_callbacks(struct device *dev, bool clear_td);
extern void pm_genpd_init(struct generic_pm_domain *genpd,
			  struct dev_power_governor *gov, bool is_off);

extern int pm_genpd_poweron(struct generic_pm_domain *genpd);

extern bool default_stop_ok(struct device *dev);

#else

static inline struct generic_pm_domain *dev_to_genpd(struct device *dev)
{
	return ERR_PTR(-ENOSYS);
}
static inline int __pm_genpd_add_device(struct generic_pm_domain *genpd,
					struct device *dev,
					struct gpd_timing_data *td)
{
	return -ENOSYS;
}
static inline int pm_genpd_add_device(struct generic_pm_domain *genpd,
				      struct device *dev)
{
	return -ENOSYS;
}
static inline int pm_genpd_remove_device(struct generic_pm_domain *genpd,
					 struct device *dev)
{
	return -ENOSYS;
}
static inline int pm_genpd_add_subdomain(struct generic_pm_domain *genpd,
					 struct generic_pm_domain *new_sd)
{
	return -ENOSYS;
}
static inline int pm_genpd_remove_subdomain(struct generic_pm_domain *genpd,
					    struct generic_pm_domain *target)
{
	return -ENOSYS;
}
static inline int pm_genpd_add_callbacks(struct device *dev,
					 struct gpd_dev_ops *ops,
					 struct gpd_timing_data *td)
{
	return -ENOSYS;
}
static inline int __pm_genpd_remove_callbacks(struct device *dev, bool clear_td)
{
	return -ENOSYS;
}
static inline void pm_genpd_init(struct generic_pm_domain *genpd, bool is_off)
{
}
static inline int pm_genpd_poweron(struct generic_pm_domain *genpd)
{
	return -ENOSYS;
}
static inline bool default_stop_ok(struct device *dev)
{
	return false;
}
#endif

static inline int pm_genpd_remove_callbacks(struct device *dev)
{
	return __pm_genpd_remove_callbacks(dev, true);
}

#ifdef CONFIG_PM_GENERIC_DOMAINS_RUNTIME
extern void genpd_queue_power_off_work(struct generic_pm_domain *genpd);
extern void pm_genpd_poweroff_unused(void);
#else
static inline void genpd_queue_power_off_work(struct generic_pm_domain *gpd) {}
static inline void pm_genpd_poweroff_unused(void) {}
#endif

#endif /* _LINUX_PM_DOMAIN_H */
Commit	Line	Data
f721889f RW	1	/*
	2	* pm_domain.h - Definitions and headers related to device power domains.
	3	*
	4	* Copyright (C) 2011 Rafael J. Wysocki <rjw@sisk.pl>, Renesas Electronics Corp.
	5	*
	6	* This file is released under the GPLv2.
	7	*/
	8
	9	#ifndef _LINUX_PM_DOMAIN_H
	10	#define _LINUX_PM_DOMAIN_H
	11
	12	#include <linux/device.h>
	13
17b75eca RW	14	enum gpd_status {
17b75eca RW	15	GPD_STATE_ACTIVE = 0, /* PM domain is active */
17877eb5	16	GPD_STATE_WAIT_MASTER, /* PM domain's master is being waited for */
17b75eca	17	GPD_STATE_BUSY, /* Something is happening to the PM domain */
c6d22b37	18	GPD_STATE_REPEAT, /* Power off in progress, to be repeated */
17b75eca RW	19	GPD_STATE_POWER_OFF, /* PM domain is off */
17b75eca RW	20	};
596ba34b	21
f721889f RW	22	struct dev_power_governor {
f721889f RW	23	bool (power_down_ok)(struct dev_pm_domain domain);
b02c999a	24	bool (stop_ok)(struct device dev);
f721889f RW	25	};
f721889f RW	26
d5e4cbfe RW	27	struct gpd_dev_ops {
	28	int (start)(struct device dev);
	29	int (stop)(struct device dev);
ecf00475 RW	30	int (save_state)(struct device dev);
ecf00475 RW	31	int (restore_state)(struct device dev);
d23b9b00 RW	32	int (suspend)(struct device dev);
	33	int (suspend_late)(struct device dev);
	34	int (resume_early)(struct device dev);
	35	int (resume)(struct device dev);
	36	int (freeze)(struct device dev);
	37	int (freeze_late)(struct device dev);
	38	int (thaw_early)(struct device dev);
	39	int (thaw)(struct device dev);
d5e4cbfe RW	40	bool (active_wakeup)(struct device dev);
	41	};
	42
f721889f RW	43	struct generic_pm_domain {
f721889f RW	44	struct dev_pm_domain domain; /* PM domain operations */
5125bbf3	45	struct list_head gpd_list_node; /* Node in the global PM domains list */
5063ce15 RW	46	struct list_head master_links; /* Links with PM domain as a master */
5063ce15 RW	47	struct list_head slave_links; /* Links with PM domain as a slave */
f721889f RW	48	struct list_head dev_list; /* List of devices */
	49	struct mutex lock;
	50	struct dev_power_governor *gov;
	51	struct work_struct power_off_work;
	52	unsigned int in_progress; /* Number of devices being suspended now */
c4bb3160	53	atomic_t sd_count; /* Number of subdomains with power "on" */
17b75eca RW	54	enum gpd_status status; /* Current state of the domain */
17b75eca RW	55	wait_queue_head_t status_wait_queue;
c6d22b37 RW	56	struct task_struct poweroff_task; / Powering off task */
c6d22b37 RW	57	unsigned int resume_count; /* Number of devices being resumed */
596ba34b RW	58	unsigned int device_count; /* Number of devices */
	59	unsigned int suspended_count; /* System suspend device counter */
	60	unsigned int prepared_count; /* Suspend counter of prepared devices */
	61	bool suspend_power_off; /* Power status before system suspend */
0aa2a221	62	bool dev_irq_safe; /* Device callbacks are IRQ-safe */
f721889f RW	63	int (power_off)(struct generic_pm_domain domain);
f721889f RW	64	int (power_on)(struct generic_pm_domain domain);
d5e4cbfe	65	struct gpd_dev_ops dev_ops;
f721889f RW	66	};
f721889f RW	67
596ba34b RW	68	static inline struct generic_pm_domain pd_to_genpd(struct dev_pm_domain pd)
	69	{
	70	return container_of(pd, struct generic_pm_domain, domain);
	71	}
	72
5063ce15 RW	73	struct gpd_link {
	74	struct generic_pm_domain *master;
	75	struct list_head master_node;
	76	struct generic_pm_domain *slave;
	77	struct list_head slave_node;
	78	};
	79
b02c999a RW	80	struct gpd_timing_data {
	81	s64 stop_latency_ns;
	82	s64 start_latency_ns;
	83	s64 break_even_ns;
	84	};
	85
cd0ea672 RW	86	struct generic_pm_domain_data {
cd0ea672 RW	87	struct pm_domain_data base;
d5e4cbfe	88	struct gpd_dev_ops ops;
b02c999a	89	struct gpd_timing_data td;
cd0ea672 RW	90	bool need_restore;
	91	};
	92
	93	static inline struct generic_pm_domain_data to_gpd_data(struct pm_domain_data pdd)
	94	{
	95	return container_of(pdd, struct generic_pm_domain_data, base);
	96	}
	97
f721889f	98	#ifdef CONFIG_PM_GENERIC_DOMAINS
d5e4cbfe RW	99	static inline struct generic_pm_domain_data dev_gpd_data(struct device dev)
	100	{
	101	return to_gpd_data(dev->power.subsys_data->domain_data);
	102	}
	103
b02c999a RW	104	extern struct dev_power_governor simple_qos_governor;
	105
	106	extern struct generic_pm_domain dev_to_genpd(struct device dev);
	107	extern int __pm_genpd_add_device(struct generic_pm_domain *genpd,
	108	struct device *dev,
	109	struct gpd_timing_data *td);
	110
	111	static inline int pm_genpd_add_device(struct generic_pm_domain *genpd,
	112	struct device *dev)
	113	{
	114	return __pm_genpd_add_device(genpd, dev, NULL);
	115	}
	116
f721889f RW	117	extern int pm_genpd_remove_device(struct generic_pm_domain *genpd,
	118	struct device *dev);
	119	extern int pm_genpd_add_subdomain(struct generic_pm_domain *genpd,
	120	struct generic_pm_domain *new_subdomain);
	121	extern int pm_genpd_remove_subdomain(struct generic_pm_domain *genpd,
	122	struct generic_pm_domain *target);
b02c999a RW	123	extern int pm_genpd_add_callbacks(struct device *dev,
	124	struct gpd_dev_ops *ops,
	125	struct gpd_timing_data *td);
	126	extern int __pm_genpd_remove_callbacks(struct device *dev, bool clear_td);
f721889f RW	127	extern void pm_genpd_init(struct generic_pm_domain *genpd,
f721889f RW	128	struct dev_power_governor *gov, bool is_off);
b02c999a	129
18b4f3f5	130	extern int pm_genpd_poweron(struct generic_pm_domain *genpd);
b02c999a RW	131
	132	extern bool default_stop_ok(struct device *dev);
	133
f721889f	134	#else
b02c999a RW	135
	136	static inline struct generic_pm_domain dev_to_genpd(struct device dev)
	137	{
	138	return ERR_PTR(-ENOSYS);
	139	}
	140	static inline int __pm_genpd_add_device(struct generic_pm_domain *genpd,
	141	struct device *dev,
	142	struct gpd_timing_data *td)
	143	{
	144	return -ENOSYS;
	145	}
f721889f RW	146	static inline int pm_genpd_add_device(struct generic_pm_domain *genpd,
	147	struct device *dev)
	148	{
	149	return -ENOSYS;
	150	}
	151	static inline int pm_genpd_remove_device(struct generic_pm_domain *genpd,
	152	struct device *dev)
	153	{
	154	return -ENOSYS;
	155	}
	156	static inline int pm_genpd_add_subdomain(struct generic_pm_domain *genpd,
	157	struct generic_pm_domain *new_sd)
	158	{
	159	return -ENOSYS;
	160	}
	161	static inline int pm_genpd_remove_subdomain(struct generic_pm_domain *genpd,
	162	struct generic_pm_domain *target)
	163	{
	164	return -ENOSYS;
	165	}
d5e4cbfe	166	static inline int pm_genpd_add_callbacks(struct device *dev,
b02c999a RW	167	struct gpd_dev_ops *ops,
b02c999a RW	168	struct gpd_timing_data *td)
d5e4cbfe RW	169	{
	170	return -ENOSYS;
	171	}
b02c999a	172	static inline int __pm_genpd_remove_callbacks(struct device *dev, bool clear_td)
d5e4cbfe RW	173	{
	174	return -ENOSYS;
	175	}
b02c999a RW	176	static inline void pm_genpd_init(struct generic_pm_domain *genpd, bool is_off)
	177	{
	178	}
18b4f3f5 MD	179	static inline int pm_genpd_poweron(struct generic_pm_domain *genpd)
	180	{
	181	return -ENOSYS;
	182	}
b02c999a RW	183	static inline bool default_stop_ok(struct device *dev)
	184	{
	185	return false;
	186	}
17f2ae7f RW	187	#endif
17f2ae7f RW	188
b02c999a RW	189	static inline int pm_genpd_remove_callbacks(struct device *dev)
	190	{
	191	return __pm_genpd_remove_callbacks(dev, true);
	192	}
	193
17f2ae7f RW	194	#ifdef CONFIG_PM_GENERIC_DOMAINS_RUNTIME
	195	extern void genpd_queue_power_off_work(struct generic_pm_domain *genpd);
	196	extern void pm_genpd_poweroff_unused(void);
	197	#else
0bc5b2de	198	static inline void genpd_queue_power_off_work(struct generic_pm_domain *gpd) {}
17f2ae7f	199	static inline void pm_genpd_poweroff_unused(void) {}
f721889f RW	200	#endif
	201
	202	#endif /* _LINUX_PM_DOMAIN_H */