/* SPDX-License-Identifier: GPL-2.0-only */


#ifndef _LINUX_PM_DOMAIN_H
#define _LINUX_PM_DOMAIN_H

#include <linux/device.h>
#include <linux/ktime.h>
#include <linux/mutex.h>
#include <linux/pm.h>
#include <linux/err.h>
#include <linux/of.h>
#include <linux/notifier.h>
#include <linux/spinlock.h>
#include <linux/cpumask.h>


#define GENPD_FLAG_PM_CLK	 (1U << 0)
#define GENPD_FLAG_IRQ_SAFE	 (1U << 1)
#define GENPD_FLAG_ALWAYS_ON	 (1U << 2)
#define GENPD_FLAG_ACTIVE_WAKEUP (1U << 3)
#define GENPD_FLAG_CPU_DOMAIN	 (1U << 4)
#define GENPD_FLAG_RPM_ALWAYS_ON (1U << 5)
#define GENPD_FLAG_MIN_RESIDENCY (1U << 6)

enum gpd_status {
	GENPD_STATE_ON = 0,	
	GENPD_STATE_OFF,	
};

enum genpd_notication {
	GENPD_NOTIFY_PRE_OFF = 0,
	GENPD_NOTIFY_OFF,
	GENPD_NOTIFY_PRE_ON,
	GENPD_NOTIFY_ON,
};

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

struct gpd_dev_ops {
	int (*start)(struct device *dev);
	int (*stop)(struct device *dev);
};

struct genpd_governor_data {
	s64 max_off_time_ns;
	bool max_off_time_changed;
	ktime_t next_wakeup;
	bool cached_power_down_ok;
	bool cached_power_down_state_idx;
};

struct genpd_power_state {
	s64 power_off_latency_ns;
	s64 power_on_latency_ns;
	s64 residency_ns;
	u64 usage;
	u64 rejected;
	struct fwnode_handle *fwnode;
	u64 idle_time;
	void *data;
};

struct genpd_lock_ops;
struct dev_pm_opp;
struct opp_table;

struct generic_pm_domain {
	struct device dev;
	struct dev_pm_domain domain;	
	struct list_head gpd_list_node;	
	struct list_head parent_links;	
	struct list_head child_links;	
	struct list_head dev_list;	
	struct dev_power_governor *gov;
	struct genpd_governor_data *gd;	
	struct work_struct power_off_work;
	struct fwnode_handle *provider;	
	bool has_provider;
	const char *name;
	atomic_t sd_count;	
	enum gpd_status status;	
	unsigned int device_count;	
	unsigned int suspended_count;	
	unsigned int prepared_count;	
	unsigned int performance_state;	
	cpumask_var_t cpus;		
	int (*power_off)(struct generic_pm_domain *domain);
	int (*power_on)(struct generic_pm_domain *domain);
	struct raw_notifier_head power_notifiers; 
	struct opp_table *opp_table;	
	unsigned int (*opp_to_performance_state)(struct generic_pm_domain *genpd,
						 struct dev_pm_opp *opp);
	int (*set_performance_state)(struct generic_pm_domain *genpd,
				     unsigned int state);
	struct gpd_dev_ops dev_ops;
	int (*attach_dev)(struct generic_pm_domain *domain,
			  struct device *dev);
	void (*detach_dev)(struct generic_pm_domain *domain,
			   struct device *dev);
	unsigned int flags;		
	struct genpd_power_state *states;
	void (*free_states)(struct genpd_power_state *states,
			    unsigned int state_count);
	unsigned int state_count; 
	unsigned int state_idx; 
	u64 on_time;
	u64 accounting_time;
	const struct genpd_lock_ops *lock_ops;
	union {
		struct mutex mlock;
		struct {
			spinlock_t slock;
			unsigned long lock_flags;
		};
	};

};

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 *parent;
	struct list_head parent_node;
	struct generic_pm_domain *child;
	struct list_head child_node;

	
	unsigned int performance_state;
	unsigned int prev_performance_state;
};

struct gpd_timing_data {
	s64 suspend_latency_ns;
	s64 resume_latency_ns;
	s64 effective_constraint_ns;
	ktime_t	next_wakeup;
	bool constraint_changed;
	bool cached_suspend_ok;
};

struct pm_domain_data {
	struct list_head list_node;
	struct device *dev;
};

struct generic_pm_domain_data {
	struct pm_domain_data base;
	struct gpd_timing_data *td;
	struct notifier_block nb;
	struct notifier_block *power_nb;
	int cpu;
	unsigned int performance_state;
	unsigned int default_pstate;
	unsigned int rpm_pstate;
	void *data;
};

#ifdef CONFIG_PM_GENERIC_DOMAINS
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);
}

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

int pm_genpd_add_device(struct generic_pm_domain *genpd, struct device *dev);
int pm_genpd_remove_device(struct device *dev);
int pm_genpd_add_subdomain(struct generic_pm_domain *genpd,
			   struct generic_pm_domain *subdomain);
int pm_genpd_remove_subdomain(struct generic_pm_domain *genpd,
			      struct generic_pm_domain *subdomain);
int pm_genpd_init(struct generic_pm_domain *genpd,
		  struct dev_power_governor *gov, bool is_off);
int pm_genpd_remove(struct generic_pm_domain *genpd);
int dev_pm_genpd_set_performance_state(struct device *dev, unsigned int state);
int dev_pm_genpd_add_notifier(struct device *dev, struct notifier_block *nb);
int dev_pm_genpd_remove_notifier(struct device *dev);
void dev_pm_genpd_set_next_wakeup(struct device *dev, ktime_t next);

extern struct dev_power_governor simple_qos_governor;
extern struct dev_power_governor pm_domain_always_on_gov;
#ifdef CONFIG_CPU_IDLE
extern struct dev_power_governor pm_domain_cpu_gov;
#endif
#else

static inline struct generic_pm_domain_data *dev_gpd_data(struct device *dev)
{
	return ERR_PTR(-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 device *dev)
{
	return -ENOSYS;
}
static inline int pm_genpd_add_subdomain(struct generic_pm_domain *genpd,
					 struct generic_pm_domain *subdomain)
{
	return -ENOSYS;
}
static inline int pm_genpd_remove_subdomain(struct generic_pm_domain *genpd,
					    struct generic_pm_domain *subdomain)
{
	return -ENOSYS;
}
static inline int pm_genpd_init(struct generic_pm_domain *genpd,
				struct dev_power_governor *gov, bool is_off)
{
	return -ENOSYS;
}
static inline int pm_genpd_remove(struct generic_pm_domain *genpd)
{
	return -EOPNOTSUPP;
}

static inline int dev_pm_genpd_set_performance_state(struct device *dev,
						     unsigned int state)
{
	return -EOPNOTSUPP;
}

static inline int dev_pm_genpd_add_notifier(struct device *dev,
					    struct notifier_block *nb)
{
	return -EOPNOTSUPP;
}

static inline int dev_pm_genpd_remove_notifier(struct device *dev)
{
	return -EOPNOTSUPP;
}

static inline void dev_pm_genpd_set_next_wakeup(struct device *dev, ktime_t next)
{ }

#define simple_qos_governor		(*(struct dev_power_governor *)(NULL))
#define pm_domain_always_on_gov		(*(struct dev_power_governor *)(NULL))
#endif

#ifdef CONFIG_PM_GENERIC_DOMAINS_SLEEP
void dev_pm_genpd_suspend(struct device *dev);
void dev_pm_genpd_resume(struct device *dev);
#else
static inline void dev_pm_genpd_suspend(struct device *dev) {}
static inline void dev_pm_genpd_resume(struct device *dev) {}
#endif


struct of_device_id;

typedef struct generic_pm_domain *(*genpd_xlate_t)(struct of_phandle_args *args,
						   void *data);

struct genpd_onecell_data {
	struct generic_pm_domain **domains;
	unsigned int num_domains;
	genpd_xlate_t xlate;
};

#ifdef CONFIG_PM_GENERIC_DOMAINS_OF
int of_genpd_add_provider_simple(struct device_node *np,
				 struct generic_pm_domain *genpd);
int of_genpd_add_provider_onecell(struct device_node *np,
				  struct genpd_onecell_data *data);
void of_genpd_del_provider(struct device_node *np);
int of_genpd_add_device(struct of_phandle_args *args, struct device *dev);
int of_genpd_add_subdomain(struct of_phandle_args *parent_spec,
			   struct of_phandle_args *subdomain_spec);
int of_genpd_remove_subdomain(struct of_phandle_args *parent_spec,
			      struct of_phandle_args *subdomain_spec);
struct generic_pm_domain *of_genpd_remove_last(struct device_node *np);
int of_genpd_parse_idle_states(struct device_node *dn,
			       struct genpd_power_state **states, int *n);
unsigned int pm_genpd_opp_to_performance_state(struct device *genpd_dev,
					       struct dev_pm_opp *opp);

int genpd_dev_pm_attach(struct device *dev);
struct device *genpd_dev_pm_attach_by_id(struct device *dev,
					 unsigned int index);
struct device *genpd_dev_pm_attach_by_name(struct device *dev,
					   const char *name);
#else 
static inline int of_genpd_add_provider_simple(struct device_node *np,
					struct generic_pm_domain *genpd)
{
	return -EOPNOTSUPP;
}

static inline int of_genpd_add_provider_onecell(struct device_node *np,
					struct genpd_onecell_data *data)
{
	return -EOPNOTSUPP;
}

static inline void of_genpd_del_provider(struct device_node *np) {}

static inline int of_genpd_add_device(struct of_phandle_args *args,
				      struct device *dev)
{
	return -ENODEV;
}

static inline int of_genpd_add_subdomain(struct of_phandle_args *parent_spec,
					 struct of_phandle_args *subdomain_spec)
{
	return -ENODEV;
}

static inline int of_genpd_remove_subdomain(struct of_phandle_args *parent_spec,
					struct of_phandle_args *subdomain_spec)
{
	return -ENODEV;
}

static inline int of_genpd_parse_idle_states(struct device_node *dn,
			struct genpd_power_state **states, int *n)
{
	return -ENODEV;
}

static inline unsigned int
pm_genpd_opp_to_performance_state(struct device *genpd_dev,
				  struct dev_pm_opp *opp)
{
	return 0;
}

static inline int genpd_dev_pm_attach(struct device *dev)
{
	return 0;
}

static inline struct device *genpd_dev_pm_attach_by_id(struct device *dev,
						       unsigned int index)
{
	return NULL;
}

static inline struct device *genpd_dev_pm_attach_by_name(struct device *dev,
							 const char *name)
{
	return NULL;
}

static inline
struct generic_pm_domain *of_genpd_remove_last(struct device_node *np)
{
	return ERR_PTR(-EOPNOTSUPP);
}
#endif 

#ifdef CONFIG_PM
int dev_pm_domain_attach(struct device *dev, bool power_on);
struct device *dev_pm_domain_attach_by_id(struct device *dev,
					  unsigned int index);
struct device *dev_pm_domain_attach_by_name(struct device *dev,
					    const char *name);
void dev_pm_domain_detach(struct device *dev, bool power_off);
int dev_pm_domain_start(struct device *dev);
void dev_pm_domain_set(struct device *dev, struct dev_pm_domain *pd);
#else
static inline int dev_pm_domain_attach(struct device *dev, bool power_on)
{
	return 0;
}
static inline struct device *dev_pm_domain_attach_by_id(struct device *dev,
							unsigned int index)
{
	return NULL;
}
static inline struct device *dev_pm_domain_attach_by_name(struct device *dev,
							  const char *name)
{
	return NULL;
}
static inline void dev_pm_domain_detach(struct device *dev, bool power_off) {}
static inline int dev_pm_domain_start(struct device *dev)
{
	return 0;
}
static inline void dev_pm_domain_set(struct device *dev,
				     struct dev_pm_domain *pd) {}
#endif

#endif 
