xref: /linux/tools/power/cpupower/utils/helpers/sysfs.h (revision 498495dba268b20e8eadd7fe93c140c68b6cc9d2)
1  /* SPDX-License-Identifier: GPL-2.0 */
2  #ifndef __CPUPOWER_HELPERS_SYSFS_H__
3  #define __CPUPOWER_HELPERS_SYSFS_H__
4  
5  #define PATH_TO_CPU "/sys/devices/system/cpu/"
6  #define MAX_LINE_LEN 255
7  #define SYSFS_PATH_MAX 255
8  
9  extern unsigned int sysfs_read_file(const char *path, char *buf, size_t buflen);
10  
11  extern unsigned int sysfs_idlestate_file_exists(unsigned int cpu,
12  						unsigned int idlestate,
13  						const char *fname);
14  
15  extern int sysfs_is_cpu_online(unsigned int cpu);
16  
17  extern int sysfs_is_idlestate_disabled(unsigned int cpu,
18  				       unsigned int idlestate);
19  extern int sysfs_idlestate_disable(unsigned int cpu, unsigned int idlestate,
20  				   unsigned int disable);
21  extern unsigned long sysfs_get_idlestate_latency(unsigned int cpu,
22  						unsigned int idlestate);
23  extern unsigned long sysfs_get_idlestate_usage(unsigned int cpu,
24  					unsigned int idlestate);
25  extern unsigned long long sysfs_get_idlestate_time(unsigned int cpu,
26  						unsigned int idlestate);
27  extern char *sysfs_get_idlestate_name(unsigned int cpu,
28  				unsigned int idlestate);
29  extern char *sysfs_get_idlestate_desc(unsigned int cpu,
30  				unsigned int idlestate);
31  extern unsigned int sysfs_get_idlestate_count(unsigned int cpu);
32  
33  extern char *sysfs_get_cpuidle_governor(void);
34  extern char *sysfs_get_cpuidle_driver(void);
35  
36  extern int sysfs_get_sched(const char *smt_mc);
37  extern int sysfs_set_sched(const char *smt_mc, int val);
38  
39  #endif /* __CPUPOWER_HELPERS_SYSFS_H__ */
40