sysfs.c (7483d45f0aee3afc0646d185cabd4af9f6cab58c) sysfs.c (3a53396b0381ec9d5180fd8fe7a681c8ce95fd9a)
1/*
2 * sysfs.c - sysfs support
3 *
4 * (C) 2006-2007 Shaohua Li <shaohua.li@intel.com>
5 *
6 * This code is licenced under the GPL.
7 */
8
9#include <linux/kernel.h>
10#include <linux/cpuidle.h>
11#include <linux/sysfs.h>
12#include <linux/slab.h>
13#include <linux/cpu.h>
1/*
2 * sysfs.c - sysfs support
3 *
4 * (C) 2006-2007 Shaohua Li <shaohua.li@intel.com>
5 *
6 * This code is licenced under the GPL.
7 */
8
9#include <linux/kernel.h>
10#include <linux/cpuidle.h>
11#include <linux/sysfs.h>
12#include <linux/slab.h>
13#include <linux/cpu.h>
14#include <linux/capability.h>
14
15#include "cpuidle.h"
16
17static unsigned int sysfs_switch;
18static int __init cpuidle_sysfs_setup(char *unused)
19{
20 sysfs_switch = 1;
21 return 1;

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217 ssize_t (*show)(struct cpuidle_state *, \
218 struct cpuidle_state_usage *, char *);
219 ssize_t (*store)(struct cpuidle_state *, const char *, size_t);
220};
221
222#define define_one_state_ro(_name, show) \
223static struct cpuidle_state_attr attr_##_name = __ATTR(_name, 0444, show, NULL)
224
15
16#include "cpuidle.h"
17
18static unsigned int sysfs_switch;
19static int __init cpuidle_sysfs_setup(char *unused)
20{
21 sysfs_switch = 1;
22 return 1;

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218 ssize_t (*show)(struct cpuidle_state *, \
219 struct cpuidle_state_usage *, char *);
220 ssize_t (*store)(struct cpuidle_state *, const char *, size_t);
221};
222
223#define define_one_state_ro(_name, show) \
224static struct cpuidle_state_attr attr_##_name = __ATTR(_name, 0444, show, NULL)
225
226#define define_one_state_rw(_name, show, store) \
227static struct cpuidle_state_attr attr_##_name = __ATTR(_name, 0644, show, store)
228
225#define define_show_state_function(_name) \
226static ssize_t show_state_##_name(struct cpuidle_state *state, \
227 struct cpuidle_state_usage *state_usage, char *buf) \
228{ \
229 return sprintf(buf, "%u\n", state->_name);\
230}
231
229#define define_show_state_function(_name) \
230static ssize_t show_state_##_name(struct cpuidle_state *state, \
231 struct cpuidle_state_usage *state_usage, char *buf) \
232{ \
233 return sprintf(buf, "%u\n", state->_name);\
234}
235
236#define define_store_state_function(_name) \
237static ssize_t store_state_##_name(struct cpuidle_state *state, \
238 const char *buf, size_t size) \
239{ \
240 long value; \
241 int err; \
242 if (!capable(CAP_SYS_ADMIN)) \
243 return -EPERM; \
244 err = kstrtol(buf, 0, &value); \
245 if (err) \
246 return err; \
247 if (value) \
248 state->disable = 1; \
249 else \
250 state->disable = 0; \
251 return size; \
252}
253
232#define define_show_state_ull_function(_name) \
233static ssize_t show_state_##_name(struct cpuidle_state *state, \
234 struct cpuidle_state_usage *state_usage, char *buf) \
235{ \
236 return sprintf(buf, "%llu\n", state_usage->_name);\
237}
238
239#define define_show_state_str_function(_name) \

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246}
247
248define_show_state_function(exit_latency)
249define_show_state_function(power_usage)
250define_show_state_ull_function(usage)
251define_show_state_ull_function(time)
252define_show_state_str_function(name)
253define_show_state_str_function(desc)
254#define define_show_state_ull_function(_name) \
255static ssize_t show_state_##_name(struct cpuidle_state *state, \
256 struct cpuidle_state_usage *state_usage, char *buf) \
257{ \
258 return sprintf(buf, "%llu\n", state_usage->_name);\
259}
260
261#define define_show_state_str_function(_name) \

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268}
269
270define_show_state_function(exit_latency)
271define_show_state_function(power_usage)
272define_show_state_ull_function(usage)
273define_show_state_ull_function(time)
274define_show_state_str_function(name)
275define_show_state_str_function(desc)
276define_show_state_function(disable)
277define_store_state_function(disable)
254
255define_one_state_ro(name, show_state_name);
256define_one_state_ro(desc, show_state_desc);
257define_one_state_ro(latency, show_state_exit_latency);
258define_one_state_ro(power, show_state_power_usage);
259define_one_state_ro(usage, show_state_usage);
260define_one_state_ro(time, show_state_time);
278
279define_one_state_ro(name, show_state_name);
280define_one_state_ro(desc, show_state_desc);
281define_one_state_ro(latency, show_state_exit_latency);
282define_one_state_ro(power, show_state_power_usage);
283define_one_state_ro(usage, show_state_usage);
284define_one_state_ro(time, show_state_time);
285define_one_state_rw(disable, show_state_disable, store_state_disable);
261
262static struct attribute *cpuidle_state_default_attrs[] = {
263 &attr_name.attr,
264 &attr_desc.attr,
265 &attr_latency.attr,
266 &attr_power.attr,
267 &attr_usage.attr,
268 &attr_time.attr,
286
287static struct attribute *cpuidle_state_default_attrs[] = {
288 &attr_name.attr,
289 &attr_desc.attr,
290 &attr_latency.attr,
291 &attr_power.attr,
292 &attr_usage.attr,
293 &attr_time.attr,
294 &attr_disable.attr,
269 NULL
270};
271
272#define kobj_to_state_obj(k) container_of(k, struct cpuidle_state_kobj, kobj)
273#define kobj_to_state(k) (kobj_to_state_obj(k)->state)
274#define kobj_to_state_usage(k) (kobj_to_state_obj(k)->state_usage)
275#define attr_to_stateattr(a) container_of(a, struct cpuidle_state_attr, attr)
276static ssize_t cpuidle_state_show(struct kobject * kobj,

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282 struct cpuidle_state_attr * cattr = attr_to_stateattr(attr);
283
284 if (cattr->show)
285 ret = cattr->show(state, state_usage, buf);
286
287 return ret;
288}
289
295 NULL
296};
297
298#define kobj_to_state_obj(k) container_of(k, struct cpuidle_state_kobj, kobj)
299#define kobj_to_state(k) (kobj_to_state_obj(k)->state)
300#define kobj_to_state_usage(k) (kobj_to_state_obj(k)->state_usage)
301#define attr_to_stateattr(a) container_of(a, struct cpuidle_state_attr, attr)
302static ssize_t cpuidle_state_show(struct kobject * kobj,

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308 struct cpuidle_state_attr * cattr = attr_to_stateattr(attr);
309
310 if (cattr->show)
311 ret = cattr->show(state, state_usage, buf);
312
313 return ret;
314}
315
316static ssize_t cpuidle_state_store(struct kobject *kobj,
317 struct attribute *attr, const char *buf, size_t size)
318{
319 int ret = -EIO;
320 struct cpuidle_state *state = kobj_to_state(kobj);
321 struct cpuidle_state_attr *cattr = attr_to_stateattr(attr);
322
323 if (cattr->store)
324 ret = cattr->store(state, buf, size);
325
326 return ret;
327}
328
290static const struct sysfs_ops cpuidle_state_sysfs_ops = {
291 .show = cpuidle_state_show,
329static const struct sysfs_ops cpuidle_state_sysfs_ops = {
330 .show = cpuidle_state_show,
331 .store = cpuidle_state_store,
292};
293
294static void cpuidle_state_sysfs_release(struct kobject *kobj)
295{
296 struct cpuidle_state_kobj *state_obj = kobj_to_state_obj(kobj);
297
298 complete(&state_obj->kobj_unregister);
299}

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333
334static void cpuidle_state_sysfs_release(struct kobject *kobj)
335{
336 struct cpuidle_state_kobj *state_obj = kobj_to_state_obj(kobj);
337
338 complete(&state_obj->kobj_unregister);
339}

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