1 // SPDX-License-Identifier: GPL-2.0
2
3 #include <stdio.h>
4 #include <errno.h>
5 #include <stdlib.h>
6 #include <string.h>
7
8 #include "helpers/helpers.h"
9 #include "helpers/sysfs.h"
10 #include "cpufreq.h"
11 #include "cpupower_intern.h"
12
13 #if defined(__i386__) || defined(__x86_64__)
14
15 #define MSR_AMD_HWCR 0xc0010015
16
cpufreq_has_x86_boost_support(unsigned int cpu,int * support,int * active,int * states)17 int cpufreq_has_x86_boost_support(unsigned int cpu, int *support, int *active,
18 int *states)
19 {
20 int ret;
21 unsigned long long val;
22 char linebuf[MAX_LINE_LEN];
23 char path[SYSFS_PATH_MAX];
24 char *endp;
25
26 *support = *active = *states = 0;
27
28 if (cpupower_cpu_info.caps & CPUPOWER_CAP_AMD_CPB) {
29 *support = 1;
30
31 /* AMD Family 0x17 does not utilize PCI D18F4 like prior
32 * families and has no fixed discrete boost states but
33 * has Hardware determined variable increments instead.
34 */
35
36 if (cpupower_cpu_info.caps & CPUPOWER_CAP_AMD_CPB_MSR) {
37 if (!read_msr(cpu, MSR_AMD_HWCR, &val)) {
38 if (!(val & CPUPOWER_AMD_CPBDIS))
39 *active = 1;
40 }
41 } else {
42 ret = amd_pci_get_num_boost_states(active, states);
43 if (ret)
44 return ret;
45 }
46 } else if (cpupower_cpu_info.caps & CPUPOWER_CAP_AMD_PSTATE) {
47 amd_pstate_boost_init(cpu, support, active);
48 } else if (cpupower_cpu_info.caps & CPUPOWER_CAP_INTEL_IDA) {
49 *support = *active = 1;
50
51 snprintf(path, sizeof(path), PATH_TO_CPU "intel_pstate/no_turbo");
52
53 if (!is_valid_path(path))
54 return 0;
55
56 if (cpupower_read_sysfs(path, linebuf, MAX_LINE_LEN) == 0)
57 return -1;
58
59 val = strtol(linebuf, &endp, 0);
60 if (endp == linebuf || errno == ERANGE)
61 return -1;
62
63 *active = !val;
64 }
65 return 0;
66 }
67
cpupower_set_intel_turbo_boost(int turbo_boost)68 int cpupower_set_intel_turbo_boost(int turbo_boost)
69 {
70 char path[SYSFS_PATH_MAX];
71 char linebuf[2] = {};
72
73 snprintf(path, sizeof(path), PATH_TO_CPU "intel_pstate/no_turbo");
74
75 /* Fallback to generic solution when intel_pstate driver not running */
76 if (!is_valid_path(path))
77 return cpupower_set_generic_turbo_boost(turbo_boost);
78
79 snprintf(linebuf, sizeof(linebuf), "%d", !turbo_boost);
80
81 if (cpupower_write_sysfs(path, linebuf, 2) <= 0)
82 return -1;
83
84 return 0;
85 }
86
cpupower_intel_get_perf_bias(unsigned int cpu)87 int cpupower_intel_get_perf_bias(unsigned int cpu)
88 {
89 char linebuf[MAX_LINE_LEN];
90 char path[SYSFS_PATH_MAX];
91 unsigned long val;
92 char *endp;
93
94 if (!(cpupower_cpu_info.caps & CPUPOWER_CAP_PERF_BIAS))
95 return -1;
96
97 snprintf(path, sizeof(path), PATH_TO_CPU "cpu%u/power/energy_perf_bias", cpu);
98
99 if (cpupower_read_sysfs(path, linebuf, MAX_LINE_LEN) == 0)
100 return -1;
101
102 val = strtol(linebuf, &endp, 0);
103 if (endp == linebuf || errno == ERANGE)
104 return -1;
105
106 return val;
107 }
108
cpupower_intel_set_perf_bias(unsigned int cpu,unsigned int val)109 int cpupower_intel_set_perf_bias(unsigned int cpu, unsigned int val)
110 {
111 char path[SYSFS_PATH_MAX];
112 char linebuf[3] = {};
113
114 if (!(cpupower_cpu_info.caps & CPUPOWER_CAP_PERF_BIAS))
115 return -1;
116
117 snprintf(path, sizeof(path), PATH_TO_CPU "cpu%u/power/energy_perf_bias", cpu);
118 snprintf(linebuf, sizeof(linebuf), "%d", val);
119
120 if (cpupower_write_sysfs(path, linebuf, 3) <= 0)
121 return -1;
122
123 return 0;
124 }
125
cpupower_set_epp(unsigned int cpu,char * epp)126 int cpupower_set_epp(unsigned int cpu, char *epp)
127 {
128 char path[SYSFS_PATH_MAX];
129 char linebuf[30] = {};
130
131 snprintf(path, sizeof(path),
132 PATH_TO_CPU "cpu%u/cpufreq/energy_performance_preference", cpu);
133
134 if (!is_valid_path(path))
135 return -1;
136
137 snprintf(linebuf, sizeof(linebuf), "%s", epp);
138
139 if (cpupower_write_sysfs(path, linebuf, 30) <= 0)
140 return -1;
141
142 return 0;
143 }
144
cpupower_set_amd_pstate_mode(char * mode)145 int cpupower_set_amd_pstate_mode(char *mode)
146 {
147 char path[SYSFS_PATH_MAX];
148 char linebuf[20] = {};
149
150 snprintf(path, sizeof(path), PATH_TO_CPU "amd_pstate/status");
151
152 if (!is_valid_path(path))
153 return -1;
154
155 snprintf(linebuf, sizeof(linebuf), "%s\n", mode);
156
157 if (cpupower_write_sysfs(path, linebuf, 20) <= 0)
158 return -1;
159
160 return 0;
161 }
162
cpupower_amd_pstate_enabled(void)163 bool cpupower_amd_pstate_enabled(void)
164 {
165 char *driver = cpufreq_get_driver(0);
166 bool ret = false;
167
168 if (!driver)
169 return ret;
170
171 if (!strncmp(driver, "amd", 3))
172 ret = true;
173
174 cpufreq_put_driver(driver);
175
176 return ret;
177 }
178
179 #endif /* #if defined(__i386__) || defined(__x86_64__) */
180
cpufreq_has_generic_boost_support(bool * active)181 int cpufreq_has_generic_boost_support(bool *active)
182 {
183 char path[SYSFS_PATH_MAX];
184 char linebuf[2] = {};
185 unsigned long val;
186 char *endp;
187
188 snprintf(path, sizeof(path), PATH_TO_CPU "cpufreq/boost");
189
190 if (!is_valid_path(path))
191 return -EACCES;
192
193 if (cpupower_read_sysfs(path, linebuf, 2) <= 0)
194 return -EINVAL;
195
196 val = strtoul(linebuf, &endp, 0);
197 if (endp == linebuf || errno == ERANGE)
198 return -EINVAL;
199
200 switch (val) {
201 case 0:
202 *active = false;
203 break;
204 case 1:
205 *active = true;
206 break;
207 default:
208 return -EINVAL;
209 }
210
211 return 0;
212 }
213
214 /* get_cpustate
215 *
216 * Gather the information of all online CPUs into bitmask struct
217 */
get_cpustate(void)218 void get_cpustate(void)
219 {
220 unsigned int cpu = 0;
221
222 bitmask_clearall(online_cpus);
223 bitmask_clearall(offline_cpus);
224
225 for (cpu = bitmask_first(cpus_chosen);
226 cpu <= bitmask_last(cpus_chosen); cpu++) {
227
228 if (cpupower_is_cpu_online(cpu) == 1)
229 bitmask_setbit(online_cpus, cpu);
230 else
231 bitmask_setbit(offline_cpus, cpu);
232
233 continue;
234 }
235 }
236
237 /* print_online_cpus
238 *
239 * Print the CPU numbers of all CPUs that are online currently
240 */
print_online_cpus(void)241 void print_online_cpus(void)
242 {
243 int str_len = 0;
244 char *online_cpus_str = NULL;
245
246 str_len = online_cpus->size * 5;
247 online_cpus_str = (void *)malloc(sizeof(char) * str_len);
248
249 if (!bitmask_isallclear(online_cpus)) {
250 bitmask_displaylist(online_cpus_str, str_len, online_cpus);
251 printf(_("Following CPUs are online:\n%s\n"), online_cpus_str);
252 }
253 }
254
255 /* print_offline_cpus
256 *
257 * Print the CPU numbers of all CPUs that are offline currently
258 */
print_offline_cpus(void)259 void print_offline_cpus(void)
260 {
261 int str_len = 0;
262 char *offline_cpus_str = NULL;
263
264 str_len = offline_cpus->size * 5;
265 offline_cpus_str = (void *)malloc(sizeof(char) * str_len);
266
267 if (!bitmask_isallclear(offline_cpus)) {
268 bitmask_displaylist(offline_cpus_str, str_len, offline_cpus);
269 printf(_("Following CPUs are offline:\n%s\n"), offline_cpus_str);
270 printf(_("cpupower set operation was not performed on them\n"));
271 }
272 }
273
274 /*
275 * print_speed
276 *
277 * Print the exact CPU frequency with appropriate unit
278 */
print_speed(unsigned long speed,int no_rounding)279 void print_speed(unsigned long speed, int no_rounding)
280 {
281 unsigned long tmp;
282
283 if (no_rounding) {
284 if (speed > 1000000)
285 printf("%u.%06u GHz", ((unsigned int)speed / 1000000),
286 ((unsigned int)speed % 1000000));
287 else if (speed > 1000)
288 printf("%u.%03u MHz", ((unsigned int)speed / 1000),
289 (unsigned int)(speed % 1000));
290 else
291 printf("%lu kHz", speed);
292 } else {
293 if (speed > 1000000) {
294 tmp = speed % 10000;
295 if (tmp >= 5000)
296 speed += 10000;
297 printf("%u.%02u GHz", ((unsigned int)speed / 1000000),
298 ((unsigned int)(speed % 1000000) / 10000));
299 } else if (speed > 100000) {
300 tmp = speed % 1000;
301 if (tmp >= 500)
302 speed += 1000;
303 printf("%u MHz", ((unsigned int)speed / 1000));
304 } else if (speed > 1000) {
305 tmp = speed % 100;
306 if (tmp >= 50)
307 speed += 100;
308 printf("%u.%01u MHz", ((unsigned int)speed / 1000),
309 ((unsigned int)(speed % 1000) / 100));
310 }
311 }
312 }
313
cpupower_set_generic_turbo_boost(int turbo_boost)314 int cpupower_set_generic_turbo_boost(int turbo_boost)
315 {
316 char path[SYSFS_PATH_MAX];
317 char linebuf[2] = {};
318
319 snprintf(path, sizeof(path), PATH_TO_CPU "cpufreq/boost");
320
321 if (!is_valid_path(path))
322 return -1;
323
324 snprintf(linebuf, sizeof(linebuf), "%d", turbo_boost);
325
326 if (cpupower_write_sysfs(path, linebuf, 2) <= 0)
327 return -1;
328
329 return 0;
330 }
331