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#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_types.h>#include <linux/time64.h>
/* * Flags to control the behaviour when attaching a device to its PM domains. * * PD_FLAG_NO_DEV_LINK: As the default behaviour creates a device-link * for every PM domain that gets attached, this * flag can be used to skip that. * * PD_FLAG_DEV_LINK_ON: Add the DL_FLAG_RPM_ACTIVE to power-on the * supplier and its PM domain when creating the * device-links. * * PD_FLAG_REQUIRED_OPP: Assign required_devs for the required OPPs. The * index of the required OPP must correspond to the * index in the array of the pd_names. If pd_names * isn't specified, the index just follows the * index for the attached PM domain. * * PD_FLAG_ATTACH_POWER_ON: Power on the domain during attach. * * PD_FLAG_DETACH_POWER_OFF: Power off the domain during detach. * */#define PD_FLAG_NO_DEV_LINK BIT(0)#define PD_FLAG_DEV_LINK_ON BIT(1)#define PD_FLAG_REQUIRED_OPP BIT(2)#define PD_FLAG_ATTACH_POWER_ON BIT(3)#define PD_FLAG_DETACH_POWER_OFF BIT(4)
struct dev_pm_domain_attach_data { const char * const *pd_names; u32 num_pd_names; u32 pd_flags;};
struct dev_pm_domain_list { struct device **pd_devs; struct device_link **pd_links; u32 *opp_tokens; u32 num_pds;};
/* * Flags to control the behaviour of a genpd. * * These flags may be set in the struct generic_pm_domain's flags field by a * genpd backend driver. The flags must be set before it calls pm_genpd_init(), * which initializes a genpd. * * GENPD_FLAG_PM_CLK: Instructs genpd to use the PM clk framework, * while powering on/off attached devices. * * GENPD_FLAG_IRQ_SAFE: This informs genpd that its backend callbacks, * ->power_on|off(), doesn't sleep. Hence, these * can be invoked from within atomic context, which * enables genpd to power on/off the PM domain, * even when pm_runtime_is_irq_safe() returns true, * for any of its attached devices. Note that, a * genpd having this flag set, requires its * masterdomains to also have it set. * * GENPD_FLAG_ALWAYS_ON: Instructs genpd to always keep the PM domain * powered on. * * GENPD_FLAG_ACTIVE_WAKEUP: Instructs genpd to keep the PM domain powered * on, in case any of its attached devices is used * in the wakeup path to serve system wakeups. * * GENPD_FLAG_CPU_DOMAIN: Instructs genpd that it should expect to get * devices attached, which may belong to CPUs or * possibly have subdomains with CPUs attached. * This flag enables the genpd backend driver to * deploy idle power management support for CPUs * and groups of CPUs. Note that, the backend * driver must then comply with the so called, * last-man-standing algorithm, for the CPUs in the * PM domain. * * GENPD_FLAG_RPM_ALWAYS_ON: Instructs genpd to always keep the PM domain * powered on except for system suspend. * * GENPD_FLAG_MIN_RESIDENCY: Enable the genpd governor to consider its * components' next wakeup when determining the * optimal idle state. * * GENPD_FLAG_OPP_TABLE_FW: The genpd provider supports performance states, * but its corresponding OPP tables are not * described in DT, but are given directly by FW. * * GENPD_FLAG_DEV_NAME_FW: Instructs genpd to generate an unique device name * using ida. It is used by genpd providers which * get their genpd-names directly from FW. * * GENPD_FLAG_NO_SYNC_STATE: The ->sync_state() support is implemented in a * genpd provider specific way, likely through a * parent device node. This flag makes genpd to * skip its internal support for this. * * GENPD_FLAG_NO_STAY_ON: For genpd OF providers a powered-on PM domain at * initialization is prevented from being * powered-off until the ->sync_state() callback is * invoked. This flag informs genpd to allow a * power-off without waiting for ->sync_state(). */#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)#define GENPD_FLAG_OPP_TABLE_FW (1U << 7)#define GENPD_FLAG_DEV_NAME_FW (1U << 8)#define GENPD_FLAG_NO_SYNC_STATE (1U << 9)#define GENPD_FLAG_NO_STAY_ON (1U << 10)
enum gpd_status { GENPD_STATE_ON = 0, /* PM domain is on */ GENPD_STATE_OFF, /* PM domain is off */};
enum genpd_notication { GENPD_NOTIFY_PRE_OFF = 0, GENPD_NOTIFY_OFF, GENPD_NOTIFY_PRE_ON, GENPD_NOTIFY_ON,};
enum genpd_sync_state { GENPD_SYNC_STATE_OFF = 0, GENPD_SYNC_STATE_SIMPLE, GENPD_SYNC_STATE_ONECELL,};
struct dev_power_governor { bool (*system_power_down_ok)(struct dev_pm_domain *domain); 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; ktime_t next_hrtimer; ktime_t last_enter; bool reflect_residency; bool cached_power_down_ok; bool cached_power_down_state_idx;};
struct genpd_power_state { const char *name; s64 power_off_latency_ns; s64 power_on_latency_ns; s64 residency_ns; u64 usage; u64 rejected; u64 above; u64 below; u64 usage_s2idle; struct fwnode_handle *fwnode; u64 idle_time; void *data;};
struct genpd_lock_ops;struct opp_table;
struct generic_pm_domain { struct device dev; struct dev_pm_domain domain; /* PM domain operations */ struct list_head gpd_list_node; /* Node in the global PM domains list */ struct list_head parent_links; /* Links with PM domain as a parent */ struct list_head child_links; /* Links with PM domain as a child */ struct list_head dev_list; /* List of devices */ struct dev_power_governor *gov; struct genpd_governor_data *gd; /* Data used by a genpd governor. */ struct work_struct power_off_work; struct fwnode_handle *provider; /* Identity of the domain provider */ bool has_provider; const char *name; atomic_t sd_count; /* Number of subdomains with power "on" */ enum gpd_status status; /* Current state of the domain */ unsigned int device_count; /* Number of devices */ unsigned int device_id; /* unique device id */ unsigned int suspended_count; /* System suspend device counter */ unsigned int prepared_count; /* Suspend counter of prepared devices */ unsigned int performance_state; /* Aggregated max performance state */ cpumask_var_t cpus; /* A cpumask of the attached CPUs */ bool synced_poweroff; /* A consumer needs a synced poweroff */ bool stay_on; /* Stay powered-on during boot. */ enum genpd_sync_state sync_state; /* How sync_state is managed. */ int (*power_off)(struct generic_pm_domain *domain); int (*power_on)(struct generic_pm_domain *domain); struct raw_notifier_head power_notifiers; /* Power on/off notifiers */ struct opp_table *opp_table; /* OPP table of the genpd */ int (*set_performance_state)(struct generic_pm_domain *genpd, unsigned int state); struct gpd_dev_ops dev_ops; int (*set_hwmode_dev)(struct generic_pm_domain *domain, struct device *dev, bool enable); bool (*get_hwmode_dev)(struct generic_pm_domain *domain, struct device *dev); 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; /* Bit field of configs for genpd */ struct genpd_power_state *states; void (*free_states)(struct genpd_power_state *states, unsigned int state_count); unsigned int state_count; /* number of states */ unsigned int state_idx; /* state that genpd will go to when off */ 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; }; struct { raw_spinlock_t raw_slock; unsigned long raw_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;
/* Sub-domain's per-master domain performance state */ 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; unsigned int opp_token; bool hw_mode; bool rpm_always_on; void *data;};
#ifdef CONFIG_PM_GENERIC_DOMAINSstatic 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);void pm_genpd_inc_rejected(struct generic_pm_domain *genpd, unsigned int state_idx);struct device *dev_to_genpd_dev(struct device *dev);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);ktime_t dev_pm_genpd_get_next_hrtimer(struct device *dev);void dev_pm_genpd_synced_poweroff(struct device *dev);int dev_pm_genpd_set_hwmode(struct device *dev, bool enable);bool dev_pm_genpd_get_hwmode(struct device *dev);int dev_pm_genpd_rpm_always_on(struct device *dev, bool on);bool dev_pm_genpd_is_on(struct device *dev);
extern struct dev_power_governor simple_qos_governor;extern struct dev_power_governor pm_domain_always_on_gov;#ifdef CONFIG_CPU_IDLEextern 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 void pm_genpd_inc_rejected(struct generic_pm_domain *genpd, unsigned int state_idx){ }
static inline struct device *dev_to_genpd_dev(struct device *dev){ return ERR_PTR(-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){ }
static inline ktime_t dev_pm_genpd_get_next_hrtimer(struct device *dev){ return KTIME_MAX;}static inline void dev_pm_genpd_synced_poweroff(struct device *dev){ }
static inline int dev_pm_genpd_set_hwmode(struct device *dev, bool enable){ return -EOPNOTSUPP;}
static inline bool dev_pm_genpd_get_hwmode(struct device *dev){ return false;}
static inline int dev_pm_genpd_rpm_always_on(struct device *dev, bool on){ return -EOPNOTSUPP;}
static inline bool dev_pm_genpd_is_on(struct device *dev){ return false;}
#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_SLEEPvoid dev_pm_genpd_suspend(struct device *dev);void dev_pm_genpd_resume(struct device *dev);#elsestatic inline void dev_pm_genpd_suspend(struct device *dev) {}static inline void dev_pm_genpd_resume(struct device *dev) {}#endif
/* OF PM domain providers */struct of_device_id;
typedef struct generic_pm_domain *(*genpd_xlate_t)(const 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_OFint 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(const struct of_phandle_args *args, struct device *dev);int of_genpd_add_subdomain(const struct of_phandle_args *parent_spec, const struct of_phandle_args *subdomain_spec);int of_genpd_remove_subdomain(const struct of_phandle_args *parent_spec, const 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);void of_genpd_sync_state(struct device_node *np);int of_genpd_add_child_ids(struct device_node *np, struct genpd_onecell_data *data);int of_genpd_remove_child_ids(struct device_node *np, struct genpd_onecell_data *data);
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 /* !CONFIG_PM_GENERIC_DOMAINS_OF */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(const struct of_phandle_args *args, struct device *dev){ return -ENODEV;}
static inline int of_genpd_add_subdomain(const struct of_phandle_args *parent_spec, const struct of_phandle_args *subdomain_spec){ return -ENODEV;}
static inline int of_genpd_remove_subdomain(const struct of_phandle_args *parent_spec, const 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 void of_genpd_sync_state(struct device_node *np) {}
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 inlinestruct generic_pm_domain *of_genpd_remove_last(struct device_node *np){ return ERR_PTR(-EOPNOTSUPP);}
static inline int of_genpd_add_child_ids(struct device_node *np, struct genpd_onecell_data *data){ return -EOPNOTSUPP;}
static inline int of_genpd_remove_child_ids(struct device_node *np, struct genpd_onecell_data *data){ return -EOPNOTSUPP;}#endif /* CONFIG_PM_GENERIC_DOMAINS_OF */
#ifdef CONFIG_PMint dev_pm_domain_attach(struct device *dev, u32 flags);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);int dev_pm_domain_attach_list(struct device *dev, const struct dev_pm_domain_attach_data *data, struct dev_pm_domain_list **list);int devm_pm_domain_attach_list(struct device *dev, const struct dev_pm_domain_attach_data *data, struct dev_pm_domain_list **list);void dev_pm_domain_detach(struct device *dev, bool power_off);void dev_pm_domain_detach_list(struct dev_pm_domain_list *list);int dev_pm_domain_start(struct device *dev);void dev_pm_domain_set(struct device *dev, struct dev_pm_domain *pd);int dev_pm_domain_set_performance_state(struct device *dev, unsigned int state);#elsestatic inline int dev_pm_domain_attach(struct device *dev, u32 flags){ 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 int dev_pm_domain_attach_list(struct device *dev, const struct dev_pm_domain_attach_data *data, struct dev_pm_domain_list **list){ return 0;}
static inline int devm_pm_domain_attach_list(struct device *dev, const struct dev_pm_domain_attach_data *data, struct dev_pm_domain_list **list){ return 0;}
static inline void dev_pm_domain_detach(struct device *dev, bool power_off) {}static inline void dev_pm_domain_detach_list(struct dev_pm_domain_list *list) {}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) {}static inline int dev_pm_domain_set_performance_state(struct device *dev, unsigned int state){ return 0;}#endif
#endif /* _LINUX_PM_DOMAIN_H */