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			if (param) {
45				param = -1;
46				cont = 0;
47				break;
48			}
49			param = ret;
50			idlestate = atoi(optarg);
51			break;
52		case 'e':
53			if (param) {
54				param = -1;
55				cont = 0;
56				break;
57			}
58			param = ret;
59			idlestate = atoi(optarg);
60			break;
61		case 'D':
62			if (param) {
63				param = -1;
64				cont = 0;
65				break;
66			}
67			param = ret;
68			latency = strtoull(optarg, &endptr, 10);
69			if (*endptr != '\0') {
70				printf(_("Bad latency value: %s\n"), optarg);
71				exit(EXIT_FAILURE);
72			}
73			break;
74		case 'E':
75			if (param) {
76				param = -1;
77				cont = 0;
78				break;
79			}
80			param = ret;
81			break;
82		case -1:
83			cont = 0;
84			break;
85		}
86	} while (cont);
87
88	switch (param) {
89	case -1:
90		printf(_("You can't specify more than one "
91			 "output-specific argument\n"));
92		exit(EXIT_FAILURE);
93	case '?':
94		printf(_("invalid or unknown argument\n"));
95		exit(EXIT_FAILURE);
96	}
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	return EXIT_SUCCESS;
185}
186