sysfs.c File Reference

#include <linux/kernel.h>
#include <linux/cpuidle.h>
#include <linux/sysfs.h>
#include <linux/slab.h>
#include <linux/cpu.h>
#include <linux/capability.h>
#include "cpuidle.h"

Go to the source code of this file.

Data Structures
struct	cpuidle_attr
struct	cpuidle_state_attr

Macros
#define	define_one_ro(_name, show)   static struct cpuidle_attr attr_##_name = __ATTR(_name, 0444, show, NULL)
#define	define_one_rw(_name, show, store)   static struct cpuidle_attr attr_##_name = __ATTR(_name, 0644, show, store)
#define	kobj_to_cpuidledev(k)   container_of(k, struct cpuidle_device, kobj)
#define	attr_to_cpuidleattr(a)   container_of(a, struct cpuidle_attr, attr)
#define	define_one_state_ro(_name, show)   static struct cpuidle_state_attr attr_##_name = __ATTR(_name, 0444, show, NULL)
#define	define_one_state_rw(_name, show, store)   static struct cpuidle_state_attr attr_##_name = __ATTR(_name, 0644, show, store)
#define	define_show_state_function(_name)
#define	define_store_state_ull_function(_name)
#define	define_show_state_ull_function(_name)
#define	define_show_state_str_function(_name)
#define	kobj_to_state_obj(k)   container_of(k, struct cpuidle_state_kobj, kobj)
#define	kobj_to_state(k)   (kobj_to_state_obj(k)->state)
#define	kobj_to_state_usage(k)   (kobj_to_state_obj(k)->state_usage)
#define	attr_to_stateattr(a)   container_of(a, struct cpuidle_state_attr, attr)

Functions
	__setup ("cpuidle_sysfs_switch", cpuidle_sysfs_setup)
int	cpuidle_add_interface (struct device *dev)
void	cpuidle_remove_interface (struct device *dev)
	define_show_state_function (exit_latency)
int	cpuidle_add_state_sysfs (struct cpuidle_device *device)
void	cpuidle_remove_state_sysfs (struct cpuidle_device *device)
int	cpuidle_add_sysfs (struct device *cpu_dev)
void	cpuidle_remove_sysfs (struct device *cpu_dev)

Macro Definition Documentation

#define attr_to_cpuidleattr

(

a

)

container_of(a, struct cpuidle_attr, attr)

Definition at line 169 of file sysfs.c.

#define attr_to_stateattr

(

a

)

container_of(a, struct cpuidle_state_attr, attr)

Definition at line 303 of file sysfs.c.

#define define_one_ro	(		_name,
			show
	)		static struct cpuidle_attr attr_##_name = __ATTR(_name, 0444, show, NULL)

Definition at line 163 of file sysfs.c.

#define define_one_rw	(		_name,
			show,
			store
	)		static struct cpuidle_attr attr_##_name = __ATTR(_name, 0644, show, store)

Definition at line 165 of file sysfs.c.

#define define_one_state_ro	(		_name,
			show
	)		static struct cpuidle_state_attr attr_##_name = __ATTR(_name, 0444, show, NULL)

Definition at line 224 of file sysfs.c.

#define define_one_state_rw	(		_name,
			show,
			store
	)		static struct cpuidle_state_attr attr_##_name = __ATTR(_name, 0644, show, store)

Definition at line 227 of file sysfs.c.

#define define_show_state_function

(

_name

)

Value:

static ssize_t show_state_##_name(struct cpuidle_state *state, \
             struct cpuidle_state_usage *state_usage, char *buf) \
{ \
    return sprintf(buf, "%u\n", state->_name);\
}

Definition at line 230 of file sysfs.c.

#define define_show_state_str_function

(

_name

)

Value:

static ssize_t show_state_##_name(struct cpuidle_state *state, \
            struct cpuidle_state_usage *state_usage, char *buf) \
{ \
    if (state->_name[0] == '\0')\
        return sprintf(buf, "<null>\n");\
    return sprintf(buf, "%s\n", state->_name);\
}

Definition at line 263 of file sysfs.c.

#define define_show_state_ull_function

(

_name

)

Value:

static ssize_t show_state_##_name(struct cpuidle_state *state, \
            struct cpuidle_state_usage *state_usage, char *buf) \
{ \
    return sprintf(buf, "%llu\n", state_usage->_name);\
}

Definition at line 256 of file sysfs.c.

#define define_store_state_ull_function

(

_name

)

Value:

static ssize_t store_state_##_name(struct cpuidle_state *state, \
        struct cpuidle_state_usage *state_usage, \
        const char *buf, size_t size) \
{ \
    unsigned long long value; \
    int err; \
    if (!capable(CAP_SYS_ADMIN)) \
        return -EPERM; \
    err = kstrtoull(buf, 0, &value); \
    if (err) \
        return err; \
    if (value) \
        state_usage->_name = 1; \
    else \
        state_usage->_name = 0; \
    return size; \
}

Definition at line 237 of file sysfs.c.

#define kobj_to_cpuidledev

(

k

)

container_of(k, struct cpuidle_device, kobj)

Definition at line 168 of file sysfs.c.

#define kobj_to_state

(

k

)

(kobj_to_state_obj(k)->state)

Definition at line 301 of file sysfs.c.

#define kobj_to_state_obj

(

k

)

container_of(k, struct cpuidle_state_kobj, kobj)

Definition at line 300 of file sysfs.c.

#define kobj_to_state_usage

(

k

)

(kobj_to_state_obj(k)->state_usage)

Definition at line 302 of file sysfs.c.

Function Documentation

__setup	(	"cpuidle_sysfs_switch"	,
		cpuidle_sysfs_setup
	)

int cpuidle_add_interface

(

struct device *

dev

)

cpuidle_add_interface - add CPU global sysfs attributes

Definition at line 141 of file sysfs.c.

int cpuidle_add_state_sysfs

(

struct cpuidle_device *

device

)

cpuidle_add_driver_sysfs - adds driver-specific sysfs attributes : the target device

Definition at line 362 of file sysfs.c.

int cpuidle_add_sysfs

(

struct device *

cpu_dev

)

cpuidle_add_sysfs - creates a sysfs instance for the target device : the target device

Definition at line 411 of file sysfs.c.

void cpuidle_remove_interface

(

struct device *

dev

)

cpuidle_remove_interface - remove CPU global sysfs attributes

Definition at line 152 of file sysfs.c.

void cpuidle_remove_state_sysfs

(

struct cpuidle_device *

device

)

cpuidle_remove_driver_sysfs - removes driver-specific sysfs attributes : the target device

Definition at line 399 of file sysfs.c.

void cpuidle_remove_sysfs

(

struct device *

cpu_dev

)

cpuidle_remove_sysfs - deletes a sysfs instance on the target device : the target device

Definition at line 429 of file sysfs.c.

define_show_state_function

(

exit_latency

)

Definition at line 272 of file sysfs.c.