154 строки
5.0 KiB
C
154 строки
5.0 KiB
C
#ifndef _LINUX_PM_QOS_H
|
|
#define _LINUX_PM_QOS_H
|
|
/* interface for the pm_qos_power infrastructure of the linux kernel.
|
|
*
|
|
* Mark Gross <mgross@linux.intel.com>
|
|
*/
|
|
#include <linux/plist.h>
|
|
#include <linux/notifier.h>
|
|
#include <linux/miscdevice.h>
|
|
#include <linux/device.h>
|
|
#include <linux/workqueue.h>
|
|
|
|
enum {
|
|
PM_QOS_RESERVED = 0,
|
|
PM_QOS_CPU_DMA_LATENCY,
|
|
PM_QOS_NETWORK_LATENCY,
|
|
PM_QOS_NETWORK_THROUGHPUT,
|
|
|
|
/* insert new class ID */
|
|
PM_QOS_NUM_CLASSES,
|
|
};
|
|
|
|
#define PM_QOS_DEFAULT_VALUE -1
|
|
|
|
#define PM_QOS_CPU_DMA_LAT_DEFAULT_VALUE (2000 * USEC_PER_SEC)
|
|
#define PM_QOS_NETWORK_LAT_DEFAULT_VALUE (2000 * USEC_PER_SEC)
|
|
#define PM_QOS_NETWORK_THROUGHPUT_DEFAULT_VALUE 0
|
|
#define PM_QOS_DEV_LAT_DEFAULT_VALUE 0
|
|
|
|
struct pm_qos_request {
|
|
struct plist_node node;
|
|
int pm_qos_class;
|
|
struct delayed_work work; /* for pm_qos_update_request_timeout */
|
|
};
|
|
|
|
struct dev_pm_qos_request {
|
|
struct plist_node node;
|
|
struct device *dev;
|
|
};
|
|
|
|
enum pm_qos_type {
|
|
PM_QOS_UNITIALIZED,
|
|
PM_QOS_MAX, /* return the largest value */
|
|
PM_QOS_MIN /* return the smallest value */
|
|
};
|
|
|
|
/*
|
|
* Note: The lockless read path depends on the CPU accessing
|
|
* target_value atomically. Atomic access is only guaranteed on all CPU
|
|
* types linux supports for 32 bit quantites
|
|
*/
|
|
struct pm_qos_constraints {
|
|
struct plist_head list;
|
|
s32 target_value; /* Do not change to 64 bit */
|
|
s32 default_value;
|
|
enum pm_qos_type type;
|
|
struct blocking_notifier_head *notifiers;
|
|
};
|
|
|
|
/* Action requested to pm_qos_update_target */
|
|
enum pm_qos_req_action {
|
|
PM_QOS_ADD_REQ, /* Add a new request */
|
|
PM_QOS_UPDATE_REQ, /* Update an existing request */
|
|
PM_QOS_REMOVE_REQ /* Remove an existing request */
|
|
};
|
|
|
|
static inline int dev_pm_qos_request_active(struct dev_pm_qos_request *req)
|
|
{
|
|
return req->dev != NULL;
|
|
}
|
|
|
|
int pm_qos_update_target(struct pm_qos_constraints *c, struct plist_node *node,
|
|
enum pm_qos_req_action action, int value);
|
|
void pm_qos_add_request(struct pm_qos_request *req, int pm_qos_class,
|
|
s32 value);
|
|
void pm_qos_update_request(struct pm_qos_request *req,
|
|
s32 new_value);
|
|
void pm_qos_update_request_timeout(struct pm_qos_request *req,
|
|
s32 new_value, unsigned long timeout_us);
|
|
void pm_qos_remove_request(struct pm_qos_request *req);
|
|
|
|
int pm_qos_request(int pm_qos_class);
|
|
int pm_qos_add_notifier(int pm_qos_class, struct notifier_block *notifier);
|
|
int pm_qos_remove_notifier(int pm_qos_class, struct notifier_block *notifier);
|
|
int pm_qos_request_active(struct pm_qos_request *req);
|
|
s32 pm_qos_read_value(struct pm_qos_constraints *c);
|
|
|
|
#ifdef CONFIG_PM
|
|
s32 __dev_pm_qos_read_value(struct device *dev);
|
|
s32 dev_pm_qos_read_value(struct device *dev);
|
|
int dev_pm_qos_add_request(struct device *dev, struct dev_pm_qos_request *req,
|
|
s32 value);
|
|
int dev_pm_qos_update_request(struct dev_pm_qos_request *req, s32 new_value);
|
|
int dev_pm_qos_remove_request(struct dev_pm_qos_request *req);
|
|
int dev_pm_qos_add_notifier(struct device *dev,
|
|
struct notifier_block *notifier);
|
|
int dev_pm_qos_remove_notifier(struct device *dev,
|
|
struct notifier_block *notifier);
|
|
int dev_pm_qos_add_global_notifier(struct notifier_block *notifier);
|
|
int dev_pm_qos_remove_global_notifier(struct notifier_block *notifier);
|
|
void dev_pm_qos_constraints_init(struct device *dev);
|
|
void dev_pm_qos_constraints_destroy(struct device *dev);
|
|
int dev_pm_qos_add_ancestor_request(struct device *dev,
|
|
struct dev_pm_qos_request *req, s32 value);
|
|
#else
|
|
static inline s32 __dev_pm_qos_read_value(struct device *dev)
|
|
{ return 0; }
|
|
static inline s32 dev_pm_qos_read_value(struct device *dev)
|
|
{ return 0; }
|
|
static inline int dev_pm_qos_add_request(struct device *dev,
|
|
struct dev_pm_qos_request *req,
|
|
s32 value)
|
|
{ return 0; }
|
|
static inline int dev_pm_qos_update_request(struct dev_pm_qos_request *req,
|
|
s32 new_value)
|
|
{ return 0; }
|
|
static inline int dev_pm_qos_remove_request(struct dev_pm_qos_request *req)
|
|
{ return 0; }
|
|
static inline int dev_pm_qos_add_notifier(struct device *dev,
|
|
struct notifier_block *notifier)
|
|
{ return 0; }
|
|
static inline int dev_pm_qos_remove_notifier(struct device *dev,
|
|
struct notifier_block *notifier)
|
|
{ return 0; }
|
|
static inline int dev_pm_qos_add_global_notifier(
|
|
struct notifier_block *notifier)
|
|
{ return 0; }
|
|
static inline int dev_pm_qos_remove_global_notifier(
|
|
struct notifier_block *notifier)
|
|
{ return 0; }
|
|
static inline void dev_pm_qos_constraints_init(struct device *dev)
|
|
{
|
|
dev->power.power_state = PMSG_ON;
|
|
}
|
|
static inline void dev_pm_qos_constraints_destroy(struct device *dev)
|
|
{
|
|
dev->power.power_state = PMSG_INVALID;
|
|
}
|
|
static inline int dev_pm_qos_add_ancestor_request(struct device *dev,
|
|
struct dev_pm_qos_request *req, s32 value)
|
|
{ return 0; }
|
|
#endif
|
|
|
|
#ifdef CONFIG_PM_RUNTIME
|
|
int dev_pm_qos_expose_latency_limit(struct device *dev, s32 value);
|
|
void dev_pm_qos_hide_latency_limit(struct device *dev);
|
|
#else
|
|
static inline int dev_pm_qos_expose_latency_limit(struct device *dev, s32 value)
|
|
{ return 0; }
|
|
static inline void dev_pm_qos_hide_latency_limit(struct device *dev) {}
|
|
#endif
|
|
|
|
#endif
|