diff options
Diffstat (limited to 'drivers/acpi/processor_thermal.c')
-rw-r--r-- | drivers/acpi/processor_thermal.c | 153 |
1 files changed, 69 insertions, 84 deletions
diff --git a/drivers/acpi/processor_thermal.c b/drivers/acpi/processor_thermal.c index 12bd980a12e9..37528c3b64b0 100644 --- a/drivers/acpi/processor_thermal.c +++ b/drivers/acpi/processor_thermal.c | |||
@@ -43,20 +43,16 @@ | |||
43 | #define ACPI_PROCESSOR_CLASS "processor" | 43 | #define ACPI_PROCESSOR_CLASS "processor" |
44 | #define ACPI_PROCESSOR_DRIVER_NAME "ACPI Processor Driver" | 44 | #define ACPI_PROCESSOR_DRIVER_NAME "ACPI Processor Driver" |
45 | #define _COMPONENT ACPI_PROCESSOR_COMPONENT | 45 | #define _COMPONENT ACPI_PROCESSOR_COMPONENT |
46 | ACPI_MODULE_NAME ("acpi_processor") | 46 | ACPI_MODULE_NAME("acpi_processor") |
47 | |||
48 | 47 | ||
49 | /* -------------------------------------------------------------------------- | 48 | /* -------------------------------------------------------------------------- |
50 | Limit Interface | 49 | Limit Interface |
51 | -------------------------------------------------------------------------- */ | 50 | -------------------------------------------------------------------------- */ |
52 | 51 | static int acpi_processor_apply_limit(struct acpi_processor *pr) | |
53 | static int | ||
54 | acpi_processor_apply_limit ( | ||
55 | struct acpi_processor* pr) | ||
56 | { | 52 | { |
57 | int result = 0; | 53 | int result = 0; |
58 | u16 px = 0; | 54 | u16 px = 0; |
59 | u16 tx = 0; | 55 | u16 tx = 0; |
60 | 56 | ||
61 | ACPI_FUNCTION_TRACE("acpi_processor_apply_limit"); | 57 | ACPI_FUNCTION_TRACE("acpi_processor_apply_limit"); |
62 | 58 | ||
@@ -80,19 +76,17 @@ acpi_processor_apply_limit ( | |||
80 | pr->limit.state.px = px; | 76 | pr->limit.state.px = px; |
81 | pr->limit.state.tx = tx; | 77 | pr->limit.state.tx = tx; |
82 | 78 | ||
83 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Processor [%d] limit set to (P%d:T%d)\n", | 79 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
84 | pr->id, | 80 | "Processor [%d] limit set to (P%d:T%d)\n", pr->id, |
85 | pr->limit.state.px, | 81 | pr->limit.state.px, pr->limit.state.tx)); |
86 | pr->limit.state.tx)); | ||
87 | 82 | ||
88 | end: | 83 | end: |
89 | if (result) | 84 | if (result) |
90 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Unable to set limit\n")); | 85 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Unable to set limit\n")); |
91 | 86 | ||
92 | return_VALUE(result); | 87 | return_VALUE(result); |
93 | } | 88 | } |
94 | 89 | ||
95 | |||
96 | #ifdef CONFIG_CPU_FREQ | 90 | #ifdef CONFIG_CPU_FREQ |
97 | 91 | ||
98 | /* If a passive cooling situation is detected, primarily CPUfreq is used, as it | 92 | /* If a passive cooling situation is detected, primarily CPUfreq is used, as it |
@@ -104,7 +98,6 @@ end: | |||
104 | static unsigned int cpufreq_thermal_reduction_pctg[NR_CPUS]; | 98 | static unsigned int cpufreq_thermal_reduction_pctg[NR_CPUS]; |
105 | static unsigned int acpi_thermal_cpufreq_is_init = 0; | 99 | static unsigned int acpi_thermal_cpufreq_is_init = 0; |
106 | 100 | ||
107 | |||
108 | static int cpu_has_cpufreq(unsigned int cpu) | 101 | static int cpu_has_cpufreq(unsigned int cpu) |
109 | { | 102 | { |
110 | struct cpufreq_policy policy; | 103 | struct cpufreq_policy policy; |
@@ -115,7 +108,6 @@ static int cpu_has_cpufreq(unsigned int cpu) | |||
115 | return 0; | 108 | return 0; |
116 | } | 109 | } |
117 | 110 | ||
118 | |||
119 | static int acpi_thermal_cpufreq_increase(unsigned int cpu) | 111 | static int acpi_thermal_cpufreq_increase(unsigned int cpu) |
120 | { | 112 | { |
121 | if (!cpu_has_cpufreq(cpu)) | 113 | if (!cpu_has_cpufreq(cpu)) |
@@ -130,7 +122,6 @@ static int acpi_thermal_cpufreq_increase(unsigned int cpu) | |||
130 | return -ERANGE; | 122 | return -ERANGE; |
131 | } | 123 | } |
132 | 124 | ||
133 | |||
134 | static int acpi_thermal_cpufreq_decrease(unsigned int cpu) | 125 | static int acpi_thermal_cpufreq_decrease(unsigned int cpu) |
135 | { | 126 | { |
136 | if (!cpu_has_cpufreq(cpu)) | 127 | if (!cpu_has_cpufreq(cpu)) |
@@ -145,11 +136,8 @@ static int acpi_thermal_cpufreq_decrease(unsigned int cpu) | |||
145 | return -ERANGE; | 136 | return -ERANGE; |
146 | } | 137 | } |
147 | 138 | ||
148 | 139 | static int acpi_thermal_cpufreq_notifier(struct notifier_block *nb, | |
149 | static int acpi_thermal_cpufreq_notifier( | 140 | unsigned long event, void *data) |
150 | struct notifier_block *nb, | ||
151 | unsigned long event, | ||
152 | void *data) | ||
153 | { | 141 | { |
154 | struct cpufreq_policy *policy = data; | 142 | struct cpufreq_policy *policy = data; |
155 | unsigned long max_freq = 0; | 143 | unsigned long max_freq = 0; |
@@ -157,68 +145,74 @@ static int acpi_thermal_cpufreq_notifier( | |||
157 | if (event != CPUFREQ_ADJUST) | 145 | if (event != CPUFREQ_ADJUST) |
158 | goto out; | 146 | goto out; |
159 | 147 | ||
160 | max_freq = (policy->cpuinfo.max_freq * (100 - cpufreq_thermal_reduction_pctg[policy->cpu])) / 100; | 148 | max_freq = |
149 | (policy->cpuinfo.max_freq * | ||
150 | (100 - cpufreq_thermal_reduction_pctg[policy->cpu])) / 100; | ||
161 | 151 | ||
162 | cpufreq_verify_within_limits(policy, 0, max_freq); | 152 | cpufreq_verify_within_limits(policy, 0, max_freq); |
163 | 153 | ||
164 | out: | 154 | out: |
165 | return 0; | 155 | return 0; |
166 | } | 156 | } |
167 | 157 | ||
168 | |||
169 | static struct notifier_block acpi_thermal_cpufreq_notifier_block = { | 158 | static struct notifier_block acpi_thermal_cpufreq_notifier_block = { |
170 | .notifier_call = acpi_thermal_cpufreq_notifier, | 159 | .notifier_call = acpi_thermal_cpufreq_notifier, |
171 | }; | 160 | }; |
172 | 161 | ||
173 | 162 | void acpi_thermal_cpufreq_init(void) | |
174 | void acpi_thermal_cpufreq_init(void) { | 163 | { |
175 | int i; | 164 | int i; |
176 | 165 | ||
177 | for (i=0; i<NR_CPUS; i++) | 166 | for (i = 0; i < NR_CPUS; i++) |
178 | cpufreq_thermal_reduction_pctg[i] = 0; | 167 | cpufreq_thermal_reduction_pctg[i] = 0; |
179 | 168 | ||
180 | i = cpufreq_register_notifier(&acpi_thermal_cpufreq_notifier_block, CPUFREQ_POLICY_NOTIFIER); | 169 | i = cpufreq_register_notifier(&acpi_thermal_cpufreq_notifier_block, |
170 | CPUFREQ_POLICY_NOTIFIER); | ||
181 | if (!i) | 171 | if (!i) |
182 | acpi_thermal_cpufreq_is_init = 1; | 172 | acpi_thermal_cpufreq_is_init = 1; |
183 | } | 173 | } |
184 | 174 | ||
185 | void acpi_thermal_cpufreq_exit(void) { | 175 | void acpi_thermal_cpufreq_exit(void) |
176 | { | ||
186 | if (acpi_thermal_cpufreq_is_init) | 177 | if (acpi_thermal_cpufreq_is_init) |
187 | cpufreq_unregister_notifier(&acpi_thermal_cpufreq_notifier_block, CPUFREQ_POLICY_NOTIFIER); | 178 | cpufreq_unregister_notifier |
179 | (&acpi_thermal_cpufreq_notifier_block, | ||
180 | CPUFREQ_POLICY_NOTIFIER); | ||
188 | 181 | ||
189 | acpi_thermal_cpufreq_is_init = 0; | 182 | acpi_thermal_cpufreq_is_init = 0; |
190 | } | 183 | } |
191 | 184 | ||
192 | #else /* ! CONFIG_CPU_FREQ */ | 185 | #else /* ! CONFIG_CPU_FREQ */ |
193 | |||
194 | static int acpi_thermal_cpufreq_increase(unsigned int cpu) { return -ENODEV; } | ||
195 | static int acpi_thermal_cpufreq_decrease(unsigned int cpu) { return -ENODEV; } | ||
196 | 186 | ||
187 | static int acpi_thermal_cpufreq_increase(unsigned int cpu) | ||
188 | { | ||
189 | return -ENODEV; | ||
190 | } | ||
191 | static int acpi_thermal_cpufreq_decrease(unsigned int cpu) | ||
192 | { | ||
193 | return -ENODEV; | ||
194 | } | ||
197 | 195 | ||
198 | #endif | 196 | #endif |
199 | 197 | ||
200 | 198 | int acpi_processor_set_thermal_limit(acpi_handle handle, int type) | |
201 | int | ||
202 | acpi_processor_set_thermal_limit ( | ||
203 | acpi_handle handle, | ||
204 | int type) | ||
205 | { | 199 | { |
206 | int result = 0; | 200 | int result = 0; |
207 | struct acpi_processor *pr = NULL; | 201 | struct acpi_processor *pr = NULL; |
208 | struct acpi_device *device = NULL; | 202 | struct acpi_device *device = NULL; |
209 | int tx = 0; | 203 | int tx = 0; |
210 | 204 | ||
211 | ACPI_FUNCTION_TRACE("acpi_processor_set_thermal_limit"); | 205 | ACPI_FUNCTION_TRACE("acpi_processor_set_thermal_limit"); |
212 | 206 | ||
213 | if ((type < ACPI_PROCESSOR_LIMIT_NONE) | 207 | if ((type < ACPI_PROCESSOR_LIMIT_NONE) |
214 | || (type > ACPI_PROCESSOR_LIMIT_DECREMENT)) | 208 | || (type > ACPI_PROCESSOR_LIMIT_DECREMENT)) |
215 | return_VALUE(-EINVAL); | 209 | return_VALUE(-EINVAL); |
216 | 210 | ||
217 | result = acpi_bus_get_device(handle, &device); | 211 | result = acpi_bus_get_device(handle, &device); |
218 | if (result) | 212 | if (result) |
219 | return_VALUE(result); | 213 | return_VALUE(result); |
220 | 214 | ||
221 | pr = (struct acpi_processor *) acpi_driver_data(device); | 215 | pr = (struct acpi_processor *)acpi_driver_data(device); |
222 | if (!pr) | 216 | if (!pr) |
223 | return_VALUE(-ENODEV); | 217 | return_VALUE(-ENODEV); |
224 | 218 | ||
@@ -250,12 +244,12 @@ acpi_processor_set_thermal_limit ( | |||
250 | goto end; | 244 | goto end; |
251 | else if (result == -ERANGE) | 245 | else if (result == -ERANGE) |
252 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | 246 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
253 | "At maximum performance state\n")); | 247 | "At maximum performance state\n")); |
254 | 248 | ||
255 | if (pr->flags.throttling) { | 249 | if (pr->flags.throttling) { |
256 | if (tx == (pr->throttling.state_count - 1)) | 250 | if (tx == (pr->throttling.state_count - 1)) |
257 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | 251 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
258 | "At maximum throttling state\n")); | 252 | "At maximum throttling state\n")); |
259 | else | 253 | else |
260 | tx++; | 254 | tx++; |
261 | } | 255 | } |
@@ -267,7 +261,7 @@ acpi_processor_set_thermal_limit ( | |||
267 | if (pr->flags.throttling) { | 261 | if (pr->flags.throttling) { |
268 | if (tx == 0) | 262 | if (tx == 0) |
269 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | 263 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
270 | "At minimum throttling state\n")); | 264 | "At minimum throttling state\n")); |
271 | else { | 265 | else { |
272 | tx--; | 266 | tx--; |
273 | goto end; | 267 | goto end; |
@@ -277,12 +271,12 @@ acpi_processor_set_thermal_limit ( | |||
277 | result = acpi_thermal_cpufreq_decrease(pr->id); | 271 | result = acpi_thermal_cpufreq_decrease(pr->id); |
278 | if (result == -ERANGE) | 272 | if (result == -ERANGE) |
279 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | 273 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
280 | "At minimum performance state\n")); | 274 | "At minimum performance state\n")); |
281 | 275 | ||
282 | break; | 276 | break; |
283 | } | 277 | } |
284 | 278 | ||
285 | end: | 279 | end: |
286 | if (pr->flags.throttling) { | 280 | if (pr->flags.throttling) { |
287 | pr->limit.thermal.px = 0; | 281 | pr->limit.thermal.px = 0; |
288 | pr->limit.thermal.tx = tx; | 282 | pr->limit.thermal.tx = tx; |
@@ -293,18 +287,14 @@ end: | |||
293 | "Unable to set thermal limit\n")); | 287 | "Unable to set thermal limit\n")); |
294 | 288 | ||
295 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Thermal limit now (P%d:T%d)\n", | 289 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Thermal limit now (P%d:T%d)\n", |
296 | pr->limit.thermal.px, | 290 | pr->limit.thermal.px, pr->limit.thermal.tx)); |
297 | pr->limit.thermal.tx)); | ||
298 | } else | 291 | } else |
299 | result = 0; | 292 | result = 0; |
300 | 293 | ||
301 | return_VALUE(result); | 294 | return_VALUE(result); |
302 | } | 295 | } |
303 | 296 | ||
304 | 297 | int acpi_processor_get_limit_info(struct acpi_processor *pr) | |
305 | int | ||
306 | acpi_processor_get_limit_info ( | ||
307 | struct acpi_processor *pr) | ||
308 | { | 298 | { |
309 | ACPI_FUNCTION_TRACE("acpi_processor_get_limit_info"); | 299 | ACPI_FUNCTION_TRACE("acpi_processor_get_limit_info"); |
310 | 300 | ||
@@ -317,12 +307,11 @@ acpi_processor_get_limit_info ( | |||
317 | return_VALUE(0); | 307 | return_VALUE(0); |
318 | } | 308 | } |
319 | 309 | ||
320 | |||
321 | /* /proc interface */ | 310 | /* /proc interface */ |
322 | 311 | ||
323 | static int acpi_processor_limit_seq_show(struct seq_file *seq, void *offset) | 312 | static int acpi_processor_limit_seq_show(struct seq_file *seq, void *offset) |
324 | { | 313 | { |
325 | struct acpi_processor *pr = (struct acpi_processor *)seq->private; | 314 | struct acpi_processor *pr = (struct acpi_processor *)seq->private; |
326 | 315 | ||
327 | ACPI_FUNCTION_TRACE("acpi_processor_limit_seq_show"); | 316 | ACPI_FUNCTION_TRACE("acpi_processor_limit_seq_show"); |
328 | 317 | ||
@@ -335,34 +324,32 @@ static int acpi_processor_limit_seq_show(struct seq_file *seq, void *offset) | |||
335 | } | 324 | } |
336 | 325 | ||
337 | seq_printf(seq, "active limit: P%d:T%d\n" | 326 | seq_printf(seq, "active limit: P%d:T%d\n" |
338 | "user limit: P%d:T%d\n" | 327 | "user limit: P%d:T%d\n" |
339 | "thermal limit: P%d:T%d\n", | 328 | "thermal limit: P%d:T%d\n", |
340 | pr->limit.state.px, pr->limit.state.tx, | 329 | pr->limit.state.px, pr->limit.state.tx, |
341 | pr->limit.user.px, pr->limit.user.tx, | 330 | pr->limit.user.px, pr->limit.user.tx, |
342 | pr->limit.thermal.px, pr->limit.thermal.tx); | 331 | pr->limit.thermal.px, pr->limit.thermal.tx); |
343 | 332 | ||
344 | end: | 333 | end: |
345 | return_VALUE(0); | 334 | return_VALUE(0); |
346 | } | 335 | } |
347 | 336 | ||
348 | static int acpi_processor_limit_open_fs(struct inode *inode, struct file *file) | 337 | static int acpi_processor_limit_open_fs(struct inode *inode, struct file *file) |
349 | { | 338 | { |
350 | return single_open(file, acpi_processor_limit_seq_show, | 339 | return single_open(file, acpi_processor_limit_seq_show, |
351 | PDE(inode)->data); | 340 | PDE(inode)->data); |
352 | } | 341 | } |
353 | 342 | ||
354 | ssize_t acpi_processor_write_limit ( | 343 | ssize_t acpi_processor_write_limit(struct file * file, |
355 | struct file *file, | 344 | const char __user * buffer, |
356 | const char __user *buffer, | 345 | size_t count, loff_t * data) |
357 | size_t count, | ||
358 | loff_t *data) | ||
359 | { | 346 | { |
360 | int result = 0; | 347 | int result = 0; |
361 | struct seq_file *m = (struct seq_file *)file->private_data; | 348 | struct seq_file *m = (struct seq_file *)file->private_data; |
362 | struct acpi_processor *pr = (struct acpi_processor *)m->private; | 349 | struct acpi_processor *pr = (struct acpi_processor *)m->private; |
363 | char limit_string[25] = {'\0'}; | 350 | char limit_string[25] = { '\0' }; |
364 | int px = 0; | 351 | int px = 0; |
365 | int tx = 0; | 352 | int tx = 0; |
366 | 353 | ||
367 | ACPI_FUNCTION_TRACE("acpi_processor_write_limit"); | 354 | ACPI_FUNCTION_TRACE("acpi_processor_write_limit"); |
368 | 355 | ||
@@ -396,11 +383,9 @@ ssize_t acpi_processor_write_limit ( | |||
396 | return_VALUE(count); | 383 | return_VALUE(count); |
397 | } | 384 | } |
398 | 385 | ||
399 | |||
400 | struct file_operations acpi_processor_limit_fops = { | 386 | struct file_operations acpi_processor_limit_fops = { |
401 | .open = acpi_processor_limit_open_fs, | 387 | .open = acpi_processor_limit_open_fs, |
402 | .read = seq_read, | 388 | .read = seq_read, |
403 | .llseek = seq_lseek, | 389 | .llseek = seq_lseek, |
404 | .release = single_release, | 390 | .release = single_release, |
405 | }; | 391 | }; |
406 | |||