tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1#include <unistd.h>
2#include <stdio.h>
3#include <errno.h>
4#include <stdlib.h>
5#include <limits.h>
6#include <string.h>
7#include <ctype.h>
8
9#include <getopt.h>
10
11#include "cpufreq.h"
12#include "helpers/helpers.h"
13#include "helpers/sysfs.h"
14
15static struct option info_opts[] = {
16 { .name = "disable", .has_arg = required_argument, .flag = NULL, .val = 'd'},
17 { .name = "enable", .has_arg = required_argument, .flag = NULL, .val = 'e'},
18 { },
19};
20
21
22int cmd_idle_set(int argc, char **argv)
23{
24 extern char *optarg;
25 extern int optind, opterr, optopt;
26 int ret = 0, cont = 1, param = 0, idlestate = 0;
27 unsigned int cpu = 0;
28
29 do {
30 ret = getopt_long(argc, argv, "d:e:", info_opts, NULL);
31 if (ret == -1)
32 break;
33 switch (ret) {
34 case '?':
35 param = '?';
36 cont = 0;
37 break;
38 case 'd':
39 if (param) {
40 param = -1;
41 cont = 0;
42 break;
43 }
44 param = ret;
45 idlestate = atoi(optarg);
46 break;
47 case 'e':
48 if (param) {
49 param = -1;
50 cont = 0;
51 break;
52 }
53 param = ret;
54 idlestate = atoi(optarg);
55 break;
56 case -1:
57 cont = 0;
58 break;
59 }
60 } while (cont);
61
62 switch (param) {
63 case -1:
64 printf(_("You can't specify more than one "
65 "output-specific argument\n"));
66 exit(EXIT_FAILURE);
67 case '?':
68 printf(_("invalid or unknown argument\n"));
69 exit(EXIT_FAILURE);
70 }
71
72 /* Default is: set all CPUs */
73 if (bitmask_isallclear(cpus_chosen))
74 bitmask_setall(cpus_chosen);
75
76 for (cpu = bitmask_first(cpus_chosen);
77 cpu <= bitmask_last(cpus_chosen); cpu++) {
78
79 if (!bitmask_isbitset(cpus_chosen, cpu))
80 continue;
81
82 switch (param) {
83
84 case 'd':
85 ret = sysfs_idlestate_disable(cpu, idlestate, 1);
86 if (ret == 0)
87 printf(_("Idlestate %u disabled on CPU %u\n"), idlestate, cpu);
88 else if (ret == -1)
89 printf(_("Idlestate %u not available on CPU %u\n"),
90 idlestate, cpu);
91 else if (ret == -2)
92 printf(_("Idlestate disabling not supported by kernel\n"));
93 else
94 printf(_("Idlestate %u not disabled on CPU %u\n"),
95 idlestate, cpu);
96 break;
97 case 'e':
98 ret = sysfs_idlestate_disable(cpu, idlestate, 0);
99 if (ret == 0)
100 printf(_("Idlestate %u enabled on CPU %u\n"), idlestate, cpu);
101 else if (ret == -1)
102 printf(_("Idlestate %u not available on CPU %u\n"),
103 idlestate, cpu);
104 else if (ret == -2)
105 printf(_("Idlestate enabling not supported by kernel\n"));
106 else
107 printf(_("Idlestate %u not enabled on CPU %u\n"),
108 idlestate, cpu);
109 break;
110 default:
111 /* Not reachable with proper args checking */
112 printf(_("Invalid or unknown argument\n"));
113 exit(EXIT_FAILURE);
114 break;
115 }
116 }
117 return EXIT_SUCCESS;
118}