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Diffstat (limited to 'include/linux/pm_domain.h')
-rw-r--r--include/linux/pm_domain.h129
1 files changed, 115 insertions, 14 deletions
diff --git a/include/linux/pm_domain.h b/include/linux/pm_domain.h
index f9ec1736a11..a03a0ad998b 100644
--- a/include/linux/pm_domain.h
+++ b/include/linux/pm_domain.h
@@ -10,9 +10,11 @@
#define _LINUX_PM_DOMAIN_H
#include <linux/device.h>
+#include <linux/err.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 */
@@ -20,20 +22,37 @@ enum gpd_status {
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 sd_node; /* Node in the parent's subdomain list */
- struct generic_pm_domain *parent; /* Parent PM domain */
- struct list_head sd_list; /* List of dubdomains */
+ 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;
+ char *name;
unsigned int in_progress; /* Number of devices being suspended now */
- unsigned int sd_count; /* Number of subdomains with power "on" */
+ 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 */
@@ -42,11 +61,15 @@ struct generic_pm_domain {
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);
+ s64 power_off_latency_ns;
int (*power_on)(struct generic_pm_domain *domain);
- int (*start_device)(struct device *dev);
- int (*stop_device)(struct device *dev);
- bool (*active_wakeup)(struct device *dev);
+ s64 power_on_latency_ns;
+ struct gpd_dev_ops dev_ops;
+ s64 break_even_ns; /* Power break even for the entire domain. */
+ s64 max_off_time_ns; /* Maximum allowed "suspended" time. */
+ ktime_t power_off_time;
};
static inline struct generic_pm_domain *pd_to_genpd(struct dev_pm_domain *pd)
@@ -54,25 +77,82 @@ static inline struct generic_pm_domain *pd_to_genpd(struct dev_pm_domain *pd)
return container_of(pd, struct generic_pm_domain, domain);
}
-struct dev_list_entry {
- struct list_head node;
- struct device *dev;
+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 save_state_latency_ns;
+ s64 restore_state_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
-extern int pm_genpd_add_device(struct generic_pm_domain *genpd,
- struct device *dev);
+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);
+
+extern struct dev_power_governor pm_domain_always_on_gov;
#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)
{
@@ -93,14 +173,35 @@ static inline int pm_genpd_remove_subdomain(struct generic_pm_domain *genpd,
{
return -ENOSYS;
}
-static inline void pm_genpd_init(struct generic_pm_domain *genpd,
- struct dev_power_governor *gov, bool is_off) {}
+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;
+}
+#define pm_domain_always_on_gov NULL
#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);