tools/power/cpupower/utils/helpers/sysfs.h

   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__ */