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Merge branch 'pm-qos' into pm-for-linus

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* pm-qos:
  PM / QoS: Update Documentation for the pm_qos and dev_pm_qos frameworks
  PM / QoS: Add function dev_pm_qos_read_value() (v3)
  PM QoS: Add global notification mechanism for device constraints
  PM QoS: Implement per-device PM QoS constraints
  PM QoS: Generalize and export constraints management code
  PM QoS: Reorganize data structs
  PM QoS: Code reorganization
  PM QoS: Minor clean-ups
  PM QoS: Move and rename the implementation files
This commit is contained in:
Rafael J. Wysocki
2011-10-07 23:17:07 +02:00
parent c28b56b1d4 e3cba3243e
commit 9696cc9007
25 changed files with 927 additions and 286 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
include/linux/netdevice.h
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@@ -31,7 +31,7 @@
#include <linux/if_link.h>
#ifdef __KERNEL__
#include <linux/pm_qos_params.h>
#include <linux/pm_qos.h>
#include <linux/timer.h>
#include <linux/delay.h>
#include <linux/atomic.h>
@@ -964,7 +964,7 @@ struct net_device {
*/
char name[IFNAMSIZ];
struct pm_qos_request_list pm_qos_req;
struct pm_qos_request pm_qos_req;
/* device name hash chain */
struct hlist_node name_hlist;

3
include/linux/pm.h
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@@ -326,6 +326,7 @@ extern struct dev_pm_ops generic_subsys_pm_ops;
* requested by a driver.
*/
#define PM_EVENT_INVALID (-1)
#define PM_EVENT_ON 0x0000
#define PM_EVENT_FREEZE 0x0001
#define PM_EVENT_SUSPEND 0x0002
@@ -346,6 +347,7 @@ extern struct dev_pm_ops generic_subsys_pm_ops;
#define PM_EVENT_AUTO_SUSPEND (PM_EVENT_AUTO | PM_EVENT_SUSPEND)
#define PM_EVENT_AUTO_RESUME (PM_EVENT_AUTO | PM_EVENT_RESUME)
#define PMSG_INVALID ((struct pm_message){ .event = PM_EVENT_INVALID, })
#define PMSG_ON ((struct pm_message){ .event = PM_EVENT_ON, })
#define PMSG_FREEZE ((struct pm_message){ .event = PM_EVENT_FREEZE, })
#define PMSG_QUIESCE ((struct pm_message){ .event = PM_EVENT_QUIESCE, })
@@ -481,6 +483,7 @@ struct dev_pm_info {
unsigned long accounting_timestamp;
#endif
struct pm_subsys_data *subsys_data; /* Owned by the subsystem. */
struct pm_qos_constraints *constraints;
};
extern void update_pm_runtime_accounting(struct device *dev);

155
include/linux/pm_qos.h Normal file
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@@ -0,0 +1,155 @@
#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>
#define PM_QOS_RESERVED 0
#define PM_QOS_CPU_DMA_LATENCY 1
#define PM_QOS_NETWORK_LATENCY 2
#define PM_QOS_NETWORK_THROUGHPUT 3
#define PM_QOS_NUM_CLASSES 4
#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 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 != 0;
}
#ifdef CONFIG_PM
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_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);
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);
#else
static inline int pm_qos_update_target(struct pm_qos_constraints *c,
struct plist_node *node,
enum pm_qos_req_action action,
int value)
{ return 0; }
static inline void pm_qos_add_request(struct pm_qos_request *req,
int pm_qos_class, s32 value)
{ return; }
static inline void pm_qos_update_request(struct pm_qos_request *req,
s32 new_value)
{ return; }
static inline void pm_qos_remove_request(struct pm_qos_request *req)
{ return; }
static inline int pm_qos_request(int pm_qos_class)
{ return 0; }
static inline int pm_qos_add_notifier(int pm_qos_class,
struct notifier_block *notifier)
{ return 0; }
static inline int pm_qos_remove_notifier(int pm_qos_class,
struct notifier_block *notifier)
{ return 0; }
static inline int pm_qos_request_active(struct pm_qos_request *req)
{ return 0; }
static inline s32 pm_qos_read_value(struct pm_qos_constraints *c)
{ 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;
}
#endif
#endif

38
include/linux/pm_qos_params.h
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@@ -1,38 +0,0 @@
#ifndef _LINUX_PM_QOS_PARAMS_H
#define _LINUX_PM_QOS_PARAMS_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>
#define PM_QOS_RESERVED 0
#define PM_QOS_CPU_DMA_LATENCY 1
#define PM_QOS_NETWORK_LATENCY 2
#define PM_QOS_NETWORK_THROUGHPUT 3
#define PM_QOS_NUM_CLASSES 4
#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
struct pm_qos_request_list {
struct plist_node list;
int pm_qos_class;
};
void pm_qos_add_request(struct pm_qos_request_list *l, int pm_qos_class, s32 value);
void pm_qos_update_request(struct pm_qos_request_list *pm_qos_req,
s32 new_value);
void pm_qos_remove_request(struct pm_qos_request_list *pm_qos_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_list *req);
#endif