1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3 * (C) 2016 SUSE Software Solutions GmbH
4 * Thomas Renninger <trenn@suse.de>
5 */
6
7 #ifndef __CPUPOWER_RAPL_H__
8 #define __CPUPOWER_RAPL_H__
9
10 #define PATH_TO_POWERCAP "/sys/devices/virtual/powercap"
11 #define PATH_TO_RAPL "/sys/devices/virtual/powercap/intel-rapl"
12 #define PATH_TO_RAPL_CLASS "/sys/devices/virtual/powercap/intel-rapl"
13
14 #define POWERCAP_MAX_CHILD_ZONES 10
15 #define POWERCAP_MAX_TREE_DEPTH 10
16
17 #define MAX_LINE_LEN 4096
18 #define SYSFS_PATH_MAX 255
19
20 #include <stdint.h>
21
22 struct powercap_zone {
23 char name[MAX_LINE_LEN];
24 /*
25 * sys_name relative to PATH_TO_POWERCAP,
26 * do not forget the / in between
27 */
28 char sys_name[SYSFS_PATH_MAX];
29 int tree_depth;
30 struct powercap_zone *parent;
31 struct powercap_zone *children[POWERCAP_MAX_CHILD_ZONES];
32 /* More possible caps or attributes to be added? */
33 uint32_t has_power_uw:1,
34 has_energy_uj:1;
35
36 };
37
38 int powercap_walk_zones(struct powercap_zone *zone,
39 int (*f)(struct powercap_zone *zone));
40
41 struct powercap_zone *powercap_init_zones(void);
42 int powercap_get_enabled(int *mode);
43 int powercap_set_enabled(int mode);
44 int powercap_get_driver(char *driver, int buflen);
45
46 int powercap_get_max_energy_range_uj(struct powercap_zone *zone, uint64_t *val);
47 int powercap_get_energy_uj(struct powercap_zone *zone, uint64_t *val);
48 int powercap_get_max_power_range_uw(struct powercap_zone *zone, uint64_t *val);
49 int powercap_get_power_uw(struct powercap_zone *zone, uint64_t *val);
50 int powercap_zone_get_enabled(struct powercap_zone *zone, int *mode);
51 int powercap_zone_set_enabled(struct powercap_zone *zone, int mode);
52
53
54 #endif /* __CPUPOWER_RAPL_H__ */
55
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