1// SPDX-License-Identifier: GPL-2.0
2#include <unistd.h>
3#include <stdio.h>
4#include <errno.h>
5#include <stdlib.h>
6#include <limits.h>
7#include <string.h>
8#include <ctype.h>
9#include <getopt.h>
10
11#include <cpufreq.h>
12#include <cpuidle.h>
13
14#include "helpers/helpers.h"
15
16static struct option info_opts[] = {
17     {"disable",	required_argument,		NULL, 'd'},
18     {"enable",		required_argument,		NULL, 'e'},
19     {"disable-by-latency", required_argument,		NULL, 'D'},
20     {"enable-all",	no_argument,			NULL, 'E'},
21     { },
22};
23
24
25int cmd_idle_set(int argc, char **argv)
26{
27	extern char *optarg;
28	extern int optind, opterr, optopt;
29	int ret = 0, cont = 1, param = 0, disabled;
30	unsigned long long latency = 0, state_latency;
31	unsigned int cpu = 0, idlestate = 0, idlestates = 0;
32	char *endptr;
33
34	do {
35		ret = getopt_long(argc, argv, "d:e:ED:", info_opts, NULL);
36		if (ret == -1)
37			break;
38		switch (ret) {
39		case '?':
40			param = '?';
41			cont = 0;
42			break;
43		case 'd':
44		case 'e':
45			if (param) {
46				param = -1;
47				cont = 0;
48				break;
49			}
50			param = ret;
51			strtol(optarg, &endptr, 10);
52			if (*endptr != '\0') {
53				printf(_("Bad value: %s, Integer expected\n"), optarg);
54				exit(EXIT_FAILURE);
55			} else {
56				idlestate = atoi(optarg);
57			}
58			break;
59		case 'D':
60			if (param) {
61				param = -1;
62				cont = 0;
63				break;
64			}
65			param = ret;
66			latency = strtoull(optarg, &endptr, 10);
67			if (*endptr != '\0') {
68				printf(_("Bad latency value: %s\n"), optarg);
69				exit(EXIT_FAILURE);
70			}
71			break;
72		case 'E':
73			if (param) {
74				param = -1;
75				cont = 0;
76				break;
77			}
78			param = ret;
79			break;
80		case -1:
81			cont = 0;
82			break;
83		}
84	} while (cont);
85
86	switch (param) {
87	case -1:
88		printf(_("You can't specify more than one "
89			 "output-specific argument\n"));
90		exit(EXIT_FAILURE);
91	case '?':
92		printf(_("invalid or unknown argument\n"));
93		exit(EXIT_FAILURE);
94	}
95
96	get_cpustate();
97
98	/* Default is: set all CPUs */
99	if (bitmask_isallclear(cpus_chosen))
100		bitmask_setall(cpus_chosen);
101
102	for (cpu = bitmask_first(cpus_chosen);
103	     cpu <= bitmask_last(cpus_chosen); cpu++) {
104
105		if (!bitmask_isbitset(cpus_chosen, cpu))
106			continue;
107
108		if (cpupower_is_cpu_online(cpu) != 1)
109			continue;
110
111		idlestates = cpuidle_state_count(cpu);
112		if (idlestates <= 0)
113			continue;
114
115		switch (param) {
116		case 'd':
117			ret = cpuidle_state_disable(cpu, idlestate, 1);
118			if (ret == 0)
119		printf(_("Idlestate %u disabled on CPU %u\n"),  idlestate, cpu);
120			else if (ret == -1)
121		printf(_("Idlestate %u not available on CPU %u\n"),
122		       idlestate, cpu);
123			else if (ret == -2)
124		printf(_("Idlestate disabling not supported by kernel\n"));
125			else
126		printf(_("Idlestate %u not disabled on CPU %u\n"),
127		       idlestate, cpu);
128			break;
129		case 'e':
130			ret = cpuidle_state_disable(cpu, idlestate, 0);
131			if (ret == 0)
132		printf(_("Idlestate %u enabled on CPU %u\n"),  idlestate, cpu);
133			else if (ret == -1)
134		printf(_("Idlestate %u not available on CPU %u\n"),
135		       idlestate, cpu);
136			else if (ret == -2)
137		printf(_("Idlestate enabling not supported by kernel\n"));
138			else
139		printf(_("Idlestate %u not enabled on CPU %u\n"),
140		       idlestate, cpu);
141			break;
142		case 'D':
143			for (idlestate = 0; idlestate < idlestates; idlestate++) {
144				disabled = cpuidle_is_state_disabled
145					(cpu, idlestate);
146				state_latency = cpuidle_state_latency
147					(cpu, idlestate);
148				if (disabled == 1) {
149					if (latency > state_latency){
150						ret = cpuidle_state_disable
151							(cpu, idlestate, 0);
152						if (ret == 0)
153		printf(_("Idlestate %u enabled on CPU %u\n"),  idlestate, cpu);
154					}
155					continue;
156				}
157				if (latency <= state_latency){
158					ret = cpuidle_state_disable
159						(cpu, idlestate, 1);
160					if (ret == 0)
161		printf(_("Idlestate %u disabled on CPU %u\n"), idlestate, cpu);
162				}
163			}
164			break;
165		case 'E':
166			for (idlestate = 0; idlestate < idlestates; idlestate++) {
167				disabled = cpuidle_is_state_disabled
168					(cpu, idlestate);
169				if (disabled == 1) {
170					ret = cpuidle_state_disable
171						(cpu, idlestate, 0);
172					if (ret == 0)
173		printf(_("Idlestate %u enabled on CPU %u\n"), idlestate, cpu);
174				}
175			}
176			break;
177		default:
178			/* Not reachable with proper args checking */
179			printf(_("Invalid or unknown argument\n"));
180			exit(EXIT_FAILURE);
181			break;
182		}
183	}
184
185	print_offline_cpus();
186	return EXIT_SUCCESS;
187}
188