428 строки
13 KiB
C
428 строки
13 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
|
|
/*
|
|
* pm_domain.h - Definitions and headers related to device power domains.
|
|
*
|
|
* Copyright (C) 2011 Rafael J. Wysocki <rjw@sisk.pl>, Renesas Electronics Corp.
|
|
*/
|
|
|
|
#ifndef _LINUX_PM_DOMAIN_H
|
|
#define _LINUX_PM_DOMAIN_H
|
|
|
|
#include <linux/device.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>
|
|
|
|
/*
|
|
* 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.
|
|
*/
|
|
#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)
|
|
|
|
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,
|
|
};
|
|
|
|
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_power_state {
|
|
s64 power_off_latency_ns;
|
|
s64 power_on_latency_ns;
|
|
s64 residency_ns;
|
|
u64 usage;
|
|
u64 rejected;
|
|
struct fwnode_handle *fwnode;
|
|
ktime_t 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; /* 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 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 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 */
|
|
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 */
|
|
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;
|
|
s64 max_off_time_ns; /* Maximum allowed "suspended" time. */
|
|
bool max_off_time_changed;
|
|
bool cached_power_down_ok;
|
|
bool cached_power_down_state_idx;
|
|
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 */
|
|
ktime_t on_time;
|
|
ktime_t 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;
|
|
|
|
/* 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;
|
|
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;
|
|
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);
|
|
|
|
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 -ENOTSUPP;
|
|
}
|
|
|
|
static inline int dev_pm_genpd_set_performance_state(struct device *dev,
|
|
unsigned int state)
|
|
{
|
|
return -ENOTSUPP;
|
|
}
|
|
|
|
static inline int dev_pm_genpd_add_notifier(struct device *dev,
|
|
struct notifier_block *nb)
|
|
{
|
|
return -ENOTSUPP;
|
|
}
|
|
|
|
static inline int dev_pm_genpd_remove_notifier(struct device *dev)
|
|
{
|
|
return -ENOTSUPP;
|
|
}
|
|
|
|
#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 pm_genpd_syscore_poweroff(struct device *dev);
|
|
void pm_genpd_syscore_poweron(struct device *dev);
|
|
#else
|
|
static inline void pm_genpd_syscore_poweroff(struct device *dev) {}
|
|
static inline void pm_genpd_syscore_poweron(struct device *dev) {}
|
|
#endif
|
|
|
|
/* OF PM domain providers */
|
|
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 /* !CONFIG_PM_GENERIC_DOMAINS_OF */
|
|
static inline int of_genpd_add_provider_simple(struct device_node *np,
|
|
struct generic_pm_domain *genpd)
|
|
{
|
|
return -ENOTSUPP;
|
|
}
|
|
|
|
static inline int of_genpd_add_provider_onecell(struct device_node *np,
|
|
struct genpd_onecell_data *data)
|
|
{
|
|
return -ENOTSUPP;
|
|
}
|
|
|
|
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(-ENOTSUPP);
|
|
}
|
|
#endif /* CONFIG_PM_GENERIC_DOMAINS_OF */
|
|
|
|
#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 /* _LINUX_PM_DOMAIN_H */
|