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1da177e4 LT |
1 | /* |
2 | * processor_perflib.c - ACPI Processor P-States Library ($Revision: 71 $) | |
3 | * | |
4 | * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com> | |
5 | * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> | |
6 | * Copyright (C) 2004 Dominik Brodowski <linux@brodo.de> | |
7 | * Copyright (C) 2004 Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com> | |
8 | * - Added processor hotplug support | |
9 | * | |
10 | * | |
11 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
12 | * | |
13 | * This program is free software; you can redistribute it and/or modify | |
14 | * it under the terms of the GNU General Public License as published by | |
15 | * the Free Software Foundation; either version 2 of the License, or (at | |
16 | * your option) any later version. | |
17 | * | |
18 | * This program is distributed in the hope that it will be useful, but | |
19 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
20 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
21 | * General Public License for more details. | |
22 | * | |
23 | * You should have received a copy of the GNU General Public License along | |
24 | * with this program; if not, write to the Free Software Foundation, Inc., | |
25 | * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. | |
26 | * | |
27 | */ | |
28 | ||
1da177e4 LT |
29 | #include <linux/kernel.h> |
30 | #include <linux/module.h> | |
31 | #include <linux/init.h> | |
32 | #include <linux/cpufreq.h> | |
33 | ||
34 | #ifdef CONFIG_X86_ACPI_CPUFREQ_PROC_INTF | |
35 | #include <linux/proc_fs.h> | |
36 | #include <linux/seq_file.h> | |
65c19bbd | 37 | #include <linux/mutex.h> |
1da177e4 LT |
38 | |
39 | #include <asm/uaccess.h> | |
40 | #endif | |
41 | ||
42 | #include <acpi/acpi_bus.h> | |
43 | #include <acpi/processor.h> | |
44 | ||
1da177e4 LT |
45 | #define ACPI_PROCESSOR_COMPONENT 0x01000000 |
46 | #define ACPI_PROCESSOR_CLASS "processor" | |
1da177e4 LT |
47 | #define ACPI_PROCESSOR_FILE_PERFORMANCE "performance" |
48 | #define _COMPONENT ACPI_PROCESSOR_COMPONENT | |
f52fd66d | 49 | ACPI_MODULE_NAME("processor_perflib"); |
1da177e4 | 50 | |
65c19bbd | 51 | static DEFINE_MUTEX(performance_mutex); |
1da177e4 LT |
52 | |
53 | /* | |
54 | * _PPC support is implemented as a CPUfreq policy notifier: | |
55 | * This means each time a CPUfreq driver registered also with | |
56 | * the ACPI core is asked to change the speed policy, the maximum | |
57 | * value is adjusted so that it is within the platform limit. | |
58 | * | |
59 | * Also, when a new platform limit value is detected, the CPUfreq | |
60 | * policy is adjusted accordingly. | |
61 | */ | |
62 | ||
63 | #define PPC_REGISTERED 1 | |
64 | #define PPC_IN_USE 2 | |
65 | ||
66 | static int acpi_processor_ppc_status = 0; | |
67 | ||
68 | static int acpi_processor_ppc_notifier(struct notifier_block *nb, | |
4be44fcd | 69 | unsigned long event, void *data) |
1da177e4 LT |
70 | { |
71 | struct cpufreq_policy *policy = data; | |
72 | struct acpi_processor *pr; | |
73 | unsigned int ppc = 0; | |
74 | ||
65c19bbd | 75 | mutex_lock(&performance_mutex); |
1da177e4 LT |
76 | |
77 | if (event != CPUFREQ_INCOMPATIBLE) | |
78 | goto out; | |
79 | ||
80 | pr = processors[policy->cpu]; | |
81 | if (!pr || !pr->performance) | |
82 | goto out; | |
83 | ||
4be44fcd | 84 | ppc = (unsigned int)pr->performance_platform_limit; |
1da177e4 | 85 | |
0916bd3e | 86 | if (ppc >= pr->performance->state_count) |
1da177e4 LT |
87 | goto out; |
88 | ||
89 | cpufreq_verify_within_limits(policy, 0, | |
4be44fcd LB |
90 | pr->performance->states[ppc]. |
91 | core_frequency * 1000); | |
1da177e4 | 92 | |
4be44fcd | 93 | out: |
65c19bbd | 94 | mutex_unlock(&performance_mutex); |
1da177e4 LT |
95 | |
96 | return 0; | |
97 | } | |
98 | ||
1da177e4 LT |
99 | static struct notifier_block acpi_ppc_notifier_block = { |
100 | .notifier_call = acpi_processor_ppc_notifier, | |
101 | }; | |
102 | ||
4be44fcd | 103 | static int acpi_processor_get_platform_limit(struct acpi_processor *pr) |
1da177e4 | 104 | { |
4be44fcd LB |
105 | acpi_status status = 0; |
106 | unsigned long ppc = 0; | |
1da177e4 | 107 | |
1da177e4 LT |
108 | |
109 | if (!pr) | |
d550d98d | 110 | return -EINVAL; |
1da177e4 LT |
111 | |
112 | /* | |
113 | * _PPC indicates the maximum state currently supported by the platform | |
114 | * (e.g. 0 = states 0..n; 1 = states 1..n; etc. | |
115 | */ | |
116 | status = acpi_evaluate_integer(pr->handle, "_PPC", NULL, &ppc); | |
117 | ||
118 | if (status != AE_NOT_FOUND) | |
119 | acpi_processor_ppc_status |= PPC_IN_USE; | |
120 | ||
4be44fcd | 121 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { |
a6fc6720 | 122 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PPC")); |
d550d98d | 123 | return -ENODEV; |
1da177e4 LT |
124 | } |
125 | ||
4be44fcd | 126 | pr->performance_platform_limit = (int)ppc; |
1da177e4 | 127 | |
d550d98d | 128 | return 0; |
1da177e4 LT |
129 | } |
130 | ||
4be44fcd | 131 | int acpi_processor_ppc_has_changed(struct acpi_processor *pr) |
1da177e4 LT |
132 | { |
133 | int ret = acpi_processor_get_platform_limit(pr); | |
134 | if (ret < 0) | |
135 | return (ret); | |
136 | else | |
137 | return cpufreq_update_policy(pr->id); | |
138 | } | |
139 | ||
4be44fcd LB |
140 | void acpi_processor_ppc_init(void) |
141 | { | |
142 | if (!cpufreq_register_notifier | |
143 | (&acpi_ppc_notifier_block, CPUFREQ_POLICY_NOTIFIER)) | |
1da177e4 LT |
144 | acpi_processor_ppc_status |= PPC_REGISTERED; |
145 | else | |
4be44fcd LB |
146 | printk(KERN_DEBUG |
147 | "Warning: Processor Platform Limit not supported.\n"); | |
1da177e4 LT |
148 | } |
149 | ||
4be44fcd LB |
150 | void acpi_processor_ppc_exit(void) |
151 | { | |
1da177e4 | 152 | if (acpi_processor_ppc_status & PPC_REGISTERED) |
4be44fcd LB |
153 | cpufreq_unregister_notifier(&acpi_ppc_notifier_block, |
154 | CPUFREQ_POLICY_NOTIFIER); | |
1da177e4 LT |
155 | |
156 | acpi_processor_ppc_status &= ~PPC_REGISTERED; | |
157 | } | |
158 | ||
4be44fcd | 159 | static int acpi_processor_get_performance_control(struct acpi_processor *pr) |
1da177e4 | 160 | { |
4be44fcd LB |
161 | int result = 0; |
162 | acpi_status status = 0; | |
163 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
164 | union acpi_object *pct = NULL; | |
165 | union acpi_object obj = { 0 }; | |
1da177e4 | 166 | |
1da177e4 LT |
167 | |
168 | status = acpi_evaluate_object(pr->handle, "_PCT", NULL, &buffer); | |
4be44fcd | 169 | if (ACPI_FAILURE(status)) { |
a6fc6720 | 170 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PCT")); |
d550d98d | 171 | return -ENODEV; |
1da177e4 LT |
172 | } |
173 | ||
4be44fcd | 174 | pct = (union acpi_object *)buffer.pointer; |
1da177e4 | 175 | if (!pct || (pct->type != ACPI_TYPE_PACKAGE) |
4be44fcd | 176 | || (pct->package.count != 2)) { |
6468463a | 177 | printk(KERN_ERR PREFIX "Invalid _PCT data\n"); |
1da177e4 LT |
178 | result = -EFAULT; |
179 | goto end; | |
180 | } | |
181 | ||
182 | /* | |
183 | * control_register | |
184 | */ | |
185 | ||
186 | obj = pct->package.elements[0]; | |
187 | ||
188 | if ((obj.type != ACPI_TYPE_BUFFER) | |
4be44fcd LB |
189 | || (obj.buffer.length < sizeof(struct acpi_pct_register)) |
190 | || (obj.buffer.pointer == NULL)) { | |
6468463a | 191 | printk(KERN_ERR PREFIX "Invalid _PCT data (control_register)\n"); |
1da177e4 LT |
192 | result = -EFAULT; |
193 | goto end; | |
194 | } | |
4be44fcd LB |
195 | memcpy(&pr->performance->control_register, obj.buffer.pointer, |
196 | sizeof(struct acpi_pct_register)); | |
1da177e4 LT |
197 | |
198 | /* | |
199 | * status_register | |
200 | */ | |
201 | ||
202 | obj = pct->package.elements[1]; | |
203 | ||
204 | if ((obj.type != ACPI_TYPE_BUFFER) | |
4be44fcd LB |
205 | || (obj.buffer.length < sizeof(struct acpi_pct_register)) |
206 | || (obj.buffer.pointer == NULL)) { | |
6468463a | 207 | printk(KERN_ERR PREFIX "Invalid _PCT data (status_register)\n"); |
1da177e4 LT |
208 | result = -EFAULT; |
209 | goto end; | |
210 | } | |
211 | ||
4be44fcd LB |
212 | memcpy(&pr->performance->status_register, obj.buffer.pointer, |
213 | sizeof(struct acpi_pct_register)); | |
1da177e4 | 214 | |
4be44fcd | 215 | end: |
02438d87 | 216 | kfree(buffer.pointer); |
1da177e4 | 217 | |
d550d98d | 218 | return result; |
1da177e4 LT |
219 | } |
220 | ||
4be44fcd | 221 | static int acpi_processor_get_performance_states(struct acpi_processor *pr) |
1da177e4 | 222 | { |
4be44fcd LB |
223 | int result = 0; |
224 | acpi_status status = AE_OK; | |
225 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
226 | struct acpi_buffer format = { sizeof("NNNNNN"), "NNNNNN" }; | |
227 | struct acpi_buffer state = { 0, NULL }; | |
228 | union acpi_object *pss = NULL; | |
229 | int i; | |
1da177e4 | 230 | |
1da177e4 LT |
231 | |
232 | status = acpi_evaluate_object(pr->handle, "_PSS", NULL, &buffer); | |
4be44fcd | 233 | if (ACPI_FAILURE(status)) { |
a6fc6720 | 234 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PSS")); |
d550d98d | 235 | return -ENODEV; |
1da177e4 LT |
236 | } |
237 | ||
50dd0969 | 238 | pss = buffer.pointer; |
1da177e4 | 239 | if (!pss || (pss->type != ACPI_TYPE_PACKAGE)) { |
6468463a | 240 | printk(KERN_ERR PREFIX "Invalid _PSS data\n"); |
1da177e4 LT |
241 | result = -EFAULT; |
242 | goto end; | |
243 | } | |
244 | ||
245 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found %d performance states\n", | |
4be44fcd | 246 | pss->package.count)); |
1da177e4 LT |
247 | |
248 | pr->performance->state_count = pss->package.count; | |
4be44fcd LB |
249 | pr->performance->states = |
250 | kmalloc(sizeof(struct acpi_processor_px) * pss->package.count, | |
251 | GFP_KERNEL); | |
1da177e4 LT |
252 | if (!pr->performance->states) { |
253 | result = -ENOMEM; | |
254 | goto end; | |
255 | } | |
256 | ||
257 | for (i = 0; i < pr->performance->state_count; i++) { | |
258 | ||
259 | struct acpi_processor_px *px = &(pr->performance->states[i]); | |
260 | ||
261 | state.length = sizeof(struct acpi_processor_px); | |
262 | state.pointer = px; | |
263 | ||
264 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Extracting state %d\n", i)); | |
265 | ||
266 | status = acpi_extract_package(&(pss->package.elements[i]), | |
4be44fcd | 267 | &format, &state); |
1da177e4 | 268 | if (ACPI_FAILURE(status)) { |
a6fc6720 | 269 | ACPI_EXCEPTION((AE_INFO, status, "Invalid _PSS data")); |
1da177e4 LT |
270 | result = -EFAULT; |
271 | kfree(pr->performance->states); | |
272 | goto end; | |
273 | } | |
274 | ||
275 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd LB |
276 | "State [%d]: core_frequency[%d] power[%d] transition_latency[%d] bus_master_latency[%d] control[0x%x] status[0x%x]\n", |
277 | i, | |
278 | (u32) px->core_frequency, | |
279 | (u32) px->power, | |
280 | (u32) px->transition_latency, | |
281 | (u32) px->bus_master_latency, | |
282 | (u32) px->control, (u32) px->status)); | |
1da177e4 LT |
283 | |
284 | if (!px->core_frequency) { | |
6468463a LB |
285 | printk(KERN_ERR PREFIX |
286 | "Invalid _PSS data: freq is zero\n"); | |
1da177e4 LT |
287 | result = -EFAULT; |
288 | kfree(pr->performance->states); | |
289 | goto end; | |
290 | } | |
291 | } | |
292 | ||
4be44fcd | 293 | end: |
02438d87 | 294 | kfree(buffer.pointer); |
1da177e4 | 295 | |
d550d98d | 296 | return result; |
1da177e4 LT |
297 | } |
298 | ||
4be44fcd | 299 | static int acpi_processor_get_performance_info(struct acpi_processor *pr) |
1da177e4 | 300 | { |
4be44fcd LB |
301 | int result = 0; |
302 | acpi_status status = AE_OK; | |
303 | acpi_handle handle = NULL; | |
1da177e4 | 304 | |
1da177e4 LT |
305 | |
306 | if (!pr || !pr->performance || !pr->handle) | |
d550d98d | 307 | return -EINVAL; |
1da177e4 | 308 | |
1da177e4 LT |
309 | status = acpi_get_handle(pr->handle, "_PCT", &handle); |
310 | if (ACPI_FAILURE(status)) { | |
311 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 312 | "ACPI-based processor performance control unavailable\n")); |
d550d98d | 313 | return -ENODEV; |
1da177e4 LT |
314 | } |
315 | ||
316 | result = acpi_processor_get_performance_control(pr); | |
317 | if (result) | |
d550d98d | 318 | return result; |
1da177e4 LT |
319 | |
320 | result = acpi_processor_get_performance_states(pr); | |
321 | if (result) | |
d550d98d | 322 | return result; |
1da177e4 | 323 | |
d550d98d | 324 | return 0; |
1da177e4 LT |
325 | } |
326 | ||
4be44fcd LB |
327 | int acpi_processor_notify_smm(struct module *calling_module) |
328 | { | |
329 | acpi_status status; | |
330 | static int is_done = 0; | |
1da177e4 | 331 | |
1da177e4 LT |
332 | |
333 | if (!(acpi_processor_ppc_status & PPC_REGISTERED)) | |
d550d98d | 334 | return -EBUSY; |
1da177e4 LT |
335 | |
336 | if (!try_module_get(calling_module)) | |
d550d98d | 337 | return -EINVAL; |
1da177e4 LT |
338 | |
339 | /* is_done is set to negative if an error occured, | |
340 | * and to postitive if _no_ error occured, but SMM | |
341 | * was already notified. This avoids double notification | |
342 | * which might lead to unexpected results... | |
343 | */ | |
344 | if (is_done > 0) { | |
345 | module_put(calling_module); | |
d550d98d | 346 | return 0; |
4be44fcd | 347 | } else if (is_done < 0) { |
1da177e4 | 348 | module_put(calling_module); |
d550d98d | 349 | return is_done; |
1da177e4 LT |
350 | } |
351 | ||
352 | is_done = -EIO; | |
353 | ||
ad71860a | 354 | /* Can't write pstate_control to smi_command if either value is zero */ |
cee324b1 | 355 | if ((!acpi_gbl_FADT.smi_command) || (!acpi_gbl_FADT.pstate_control)) { |
ad71860a | 356 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No SMI port or pstate_control\n")); |
1da177e4 | 357 | module_put(calling_module); |
d550d98d | 358 | return 0; |
1da177e4 LT |
359 | } |
360 | ||
4be44fcd | 361 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
ad71860a | 362 | "Writing pstate_control [0x%x] to smi_command [0x%x]\n", |
cee324b1 | 363 | acpi_gbl_FADT.pstate_control, acpi_gbl_FADT.smi_command)); |
1da177e4 | 364 | |
cee324b1 AS |
365 | status = acpi_os_write_port(acpi_gbl_FADT.smi_command, |
366 | (u32) acpi_gbl_FADT.pstate_control, 8); | |
4be44fcd | 367 | if (ACPI_FAILURE(status)) { |
a6fc6720 | 368 | ACPI_EXCEPTION((AE_INFO, status, |
ad71860a | 369 | "Failed to write pstate_control [0x%x] to " |
cee324b1 AS |
370 | "smi_command [0x%x]", acpi_gbl_FADT.pstate_control, |
371 | acpi_gbl_FADT.smi_command)); | |
1da177e4 | 372 | module_put(calling_module); |
d550d98d | 373 | return status; |
1da177e4 LT |
374 | } |
375 | ||
376 | /* Success. If there's no _PPC, we need to fear nothing, so | |
377 | * we can allow the cpufreq driver to be rmmod'ed. */ | |
378 | is_done = 1; | |
379 | ||
380 | if (!(acpi_processor_ppc_status & PPC_IN_USE)) | |
381 | module_put(calling_module); | |
382 | ||
d550d98d | 383 | return 0; |
1da177e4 | 384 | } |
1da177e4 | 385 | |
4be44fcd | 386 | EXPORT_SYMBOL(acpi_processor_notify_smm); |
1da177e4 LT |
387 | |
388 | #ifdef CONFIG_X86_ACPI_CPUFREQ_PROC_INTF | |
389 | /* /proc/acpi/processor/../performance interface (DEPRECATED) */ | |
390 | ||
391 | static int acpi_processor_perf_open_fs(struct inode *inode, struct file *file); | |
392 | static struct file_operations acpi_processor_perf_fops = { | |
4be44fcd LB |
393 | .open = acpi_processor_perf_open_fs, |
394 | .read = seq_read, | |
395 | .llseek = seq_lseek, | |
396 | .release = single_release, | |
1da177e4 LT |
397 | }; |
398 | ||
399 | static int acpi_processor_perf_seq_show(struct seq_file *seq, void *offset) | |
400 | { | |
50dd0969 | 401 | struct acpi_processor *pr = seq->private; |
4be44fcd | 402 | int i; |
1da177e4 | 403 | |
1da177e4 LT |
404 | |
405 | if (!pr) | |
406 | goto end; | |
407 | ||
408 | if (!pr->performance) { | |
409 | seq_puts(seq, "<not supported>\n"); | |
410 | goto end; | |
411 | } | |
412 | ||
413 | seq_printf(seq, "state count: %d\n" | |
4be44fcd LB |
414 | "active state: P%d\n", |
415 | pr->performance->state_count, pr->performance->state); | |
1da177e4 LT |
416 | |
417 | seq_puts(seq, "states:\n"); | |
418 | for (i = 0; i < pr->performance->state_count; i++) | |
4be44fcd LB |
419 | seq_printf(seq, |
420 | " %cP%d: %d MHz, %d mW, %d uS\n", | |
421 | (i == pr->performance->state ? '*' : ' '), i, | |
422 | (u32) pr->performance->states[i].core_frequency, | |
423 | (u32) pr->performance->states[i].power, | |
424 | (u32) pr->performance->states[i].transition_latency); | |
425 | ||
426 | end: | |
d550d98d | 427 | return 0; |
1da177e4 LT |
428 | } |
429 | ||
430 | static int acpi_processor_perf_open_fs(struct inode *inode, struct file *file) | |
431 | { | |
432 | return single_open(file, acpi_processor_perf_seq_show, | |
4be44fcd | 433 | PDE(inode)->data); |
1da177e4 LT |
434 | } |
435 | ||
4be44fcd | 436 | static void acpi_cpufreq_add_file(struct acpi_processor *pr) |
1da177e4 | 437 | { |
4be44fcd LB |
438 | struct proc_dir_entry *entry = NULL; |
439 | struct acpi_device *device = NULL; | |
1da177e4 | 440 | |
1da177e4 LT |
441 | |
442 | if (acpi_bus_get_device(pr->handle, &device)) | |
d550d98d | 443 | return; |
1da177e4 LT |
444 | |
445 | /* add file 'performance' [R/W] */ | |
446 | entry = create_proc_entry(ACPI_PROCESSOR_FILE_PERFORMANCE, | |
632786ce | 447 | S_IFREG | S_IRUGO, |
4be44fcd | 448 | acpi_device_dir(device)); |
a6fc6720 | 449 | if (entry){ |
1da177e4 | 450 | entry->proc_fops = &acpi_processor_perf_fops; |
1da177e4 LT |
451 | entry->data = acpi_driver_data(device); |
452 | entry->owner = THIS_MODULE; | |
453 | } | |
d550d98d | 454 | return; |
1da177e4 LT |
455 | } |
456 | ||
4be44fcd | 457 | static void acpi_cpufreq_remove_file(struct acpi_processor *pr) |
1da177e4 | 458 | { |
4be44fcd | 459 | struct acpi_device *device = NULL; |
1da177e4 | 460 | |
1da177e4 LT |
461 | |
462 | if (acpi_bus_get_device(pr->handle, &device)) | |
d550d98d | 463 | return; |
1da177e4 LT |
464 | |
465 | /* remove file 'performance' */ | |
466 | remove_proc_entry(ACPI_PROCESSOR_FILE_PERFORMANCE, | |
4be44fcd | 467 | acpi_device_dir(device)); |
1da177e4 | 468 | |
d550d98d | 469 | return; |
1da177e4 LT |
470 | } |
471 | ||
472 | #else | |
4be44fcd LB |
473 | static void acpi_cpufreq_add_file(struct acpi_processor *pr) |
474 | { | |
475 | return; | |
476 | } | |
477 | static void acpi_cpufreq_remove_file(struct acpi_processor *pr) | |
478 | { | |
479 | return; | |
480 | } | |
481 | #endif /* CONFIG_X86_ACPI_CPUFREQ_PROC_INTF */ | |
1da177e4 | 482 | |
3b2d9942 VP |
483 | static int acpi_processor_get_psd(struct acpi_processor *pr) |
484 | { | |
485 | int result = 0; | |
486 | acpi_status status = AE_OK; | |
487 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; | |
488 | struct acpi_buffer format = {sizeof("NNNNN"), "NNNNN"}; | |
489 | struct acpi_buffer state = {0, NULL}; | |
490 | union acpi_object *psd = NULL; | |
491 | struct acpi_psd_package *pdomain; | |
492 | ||
3b2d9942 VP |
493 | status = acpi_evaluate_object(pr->handle, "_PSD", NULL, &buffer); |
494 | if (ACPI_FAILURE(status)) { | |
9011bff4 | 495 | return -ENODEV; |
3b2d9942 VP |
496 | } |
497 | ||
50dd0969 | 498 | psd = buffer.pointer; |
3b2d9942 VP |
499 | if (!psd || (psd->type != ACPI_TYPE_PACKAGE)) { |
500 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid _PSD data\n")); | |
501 | result = -EFAULT; | |
502 | goto end; | |
503 | } | |
504 | ||
505 | if (psd->package.count != 1) { | |
506 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid _PSD data\n")); | |
507 | result = -EFAULT; | |
508 | goto end; | |
509 | } | |
510 | ||
511 | pdomain = &(pr->performance->domain_info); | |
512 | ||
513 | state.length = sizeof(struct acpi_psd_package); | |
514 | state.pointer = pdomain; | |
515 | ||
516 | status = acpi_extract_package(&(psd->package.elements[0]), | |
517 | &format, &state); | |
518 | if (ACPI_FAILURE(status)) { | |
519 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid _PSD data\n")); | |
520 | result = -EFAULT; | |
521 | goto end; | |
522 | } | |
523 | ||
524 | if (pdomain->num_entries != ACPI_PSD_REV0_ENTRIES) { | |
525 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Unknown _PSD:num_entries\n")); | |
526 | result = -EFAULT; | |
527 | goto end; | |
528 | } | |
529 | ||
530 | if (pdomain->revision != ACPI_PSD_REV0_REVISION) { | |
531 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Unknown _PSD:revision\n")); | |
532 | result = -EFAULT; | |
533 | goto end; | |
534 | } | |
535 | ||
536 | end: | |
02438d87 | 537 | kfree(buffer.pointer); |
9011bff4 | 538 | return result; |
3b2d9942 VP |
539 | } |
540 | ||
541 | int acpi_processor_preregister_performance( | |
50109292 | 542 | struct acpi_processor_performance *performance) |
3b2d9942 VP |
543 | { |
544 | int count, count_target; | |
545 | int retval = 0; | |
546 | unsigned int i, j; | |
547 | cpumask_t covered_cpus; | |
548 | struct acpi_processor *pr; | |
549 | struct acpi_psd_package *pdomain; | |
550 | struct acpi_processor *match_pr; | |
551 | struct acpi_psd_package *match_pdomain; | |
552 | ||
785fcccd | 553 | mutex_lock(&performance_mutex); |
3b2d9942 VP |
554 | |
555 | retval = 0; | |
556 | ||
557 | /* Call _PSD for all CPUs */ | |
193de0c7 | 558 | for_each_possible_cpu(i) { |
3b2d9942 VP |
559 | pr = processors[i]; |
560 | if (!pr) { | |
561 | /* Look only at processors in ACPI namespace */ | |
562 | continue; | |
563 | } | |
564 | ||
565 | if (pr->performance) { | |
566 | retval = -EBUSY; | |
567 | continue; | |
568 | } | |
569 | ||
50109292 | 570 | if (!performance || !percpu_ptr(performance, i)) { |
3b2d9942 VP |
571 | retval = -EINVAL; |
572 | continue; | |
573 | } | |
574 | ||
50109292 | 575 | pr->performance = percpu_ptr(performance, i); |
3b2d9942 VP |
576 | cpu_set(i, pr->performance->shared_cpu_map); |
577 | if (acpi_processor_get_psd(pr)) { | |
578 | retval = -EINVAL; | |
579 | continue; | |
580 | } | |
581 | } | |
582 | if (retval) | |
583 | goto err_ret; | |
584 | ||
585 | /* | |
586 | * Now that we have _PSD data from all CPUs, lets setup P-state | |
587 | * domain info. | |
588 | */ | |
193de0c7 | 589 | for_each_possible_cpu(i) { |
3b2d9942 VP |
590 | pr = processors[i]; |
591 | if (!pr) | |
592 | continue; | |
593 | ||
594 | /* Basic validity check for domain info */ | |
595 | pdomain = &(pr->performance->domain_info); | |
596 | if ((pdomain->revision != ACPI_PSD_REV0_REVISION) || | |
597 | (pdomain->num_entries != ACPI_PSD_REV0_ENTRIES)) { | |
598 | retval = -EINVAL; | |
599 | goto err_ret; | |
600 | } | |
601 | if (pdomain->coord_type != DOMAIN_COORD_TYPE_SW_ALL && | |
602 | pdomain->coord_type != DOMAIN_COORD_TYPE_SW_ANY && | |
603 | pdomain->coord_type != DOMAIN_COORD_TYPE_HW_ALL) { | |
604 | retval = -EINVAL; | |
605 | goto err_ret; | |
606 | } | |
607 | } | |
608 | ||
609 | cpus_clear(covered_cpus); | |
193de0c7 | 610 | for_each_possible_cpu(i) { |
3b2d9942 VP |
611 | pr = processors[i]; |
612 | if (!pr) | |
613 | continue; | |
614 | ||
615 | if (cpu_isset(i, covered_cpus)) | |
616 | continue; | |
617 | ||
618 | pdomain = &(pr->performance->domain_info); | |
619 | cpu_set(i, pr->performance->shared_cpu_map); | |
620 | cpu_set(i, covered_cpus); | |
621 | if (pdomain->num_processors <= 1) | |
622 | continue; | |
623 | ||
624 | /* Validate the Domain info */ | |
625 | count_target = pdomain->num_processors; | |
626 | count = 1; | |
46f18e3a | 627 | if (pdomain->coord_type == DOMAIN_COORD_TYPE_SW_ALL) |
3b2d9942 | 628 | pr->performance->shared_type = CPUFREQ_SHARED_TYPE_ALL; |
46f18e3a VP |
629 | else if (pdomain->coord_type == DOMAIN_COORD_TYPE_HW_ALL) |
630 | pr->performance->shared_type = CPUFREQ_SHARED_TYPE_HW; | |
631 | else if (pdomain->coord_type == DOMAIN_COORD_TYPE_SW_ANY) | |
3b2d9942 | 632 | pr->performance->shared_type = CPUFREQ_SHARED_TYPE_ANY; |
3b2d9942 | 633 | |
193de0c7 | 634 | for_each_possible_cpu(j) { |
3b2d9942 VP |
635 | if (i == j) |
636 | continue; | |
637 | ||
638 | match_pr = processors[j]; | |
639 | if (!match_pr) | |
640 | continue; | |
641 | ||
642 | match_pdomain = &(match_pr->performance->domain_info); | |
643 | if (match_pdomain->domain != pdomain->domain) | |
644 | continue; | |
645 | ||
646 | /* Here i and j are in the same domain */ | |
647 | ||
648 | if (match_pdomain->num_processors != count_target) { | |
649 | retval = -EINVAL; | |
650 | goto err_ret; | |
651 | } | |
652 | ||
653 | if (pdomain->coord_type != match_pdomain->coord_type) { | |
654 | retval = -EINVAL; | |
655 | goto err_ret; | |
656 | } | |
657 | ||
658 | cpu_set(j, covered_cpus); | |
659 | cpu_set(j, pr->performance->shared_cpu_map); | |
660 | count++; | |
661 | } | |
662 | ||
193de0c7 | 663 | for_each_possible_cpu(j) { |
3b2d9942 VP |
664 | if (i == j) |
665 | continue; | |
666 | ||
667 | match_pr = processors[j]; | |
668 | if (!match_pr) | |
669 | continue; | |
670 | ||
671 | match_pdomain = &(match_pr->performance->domain_info); | |
672 | if (match_pdomain->domain != pdomain->domain) | |
673 | continue; | |
674 | ||
675 | match_pr->performance->shared_type = | |
676 | pr->performance->shared_type; | |
677 | match_pr->performance->shared_cpu_map = | |
678 | pr->performance->shared_cpu_map; | |
679 | } | |
680 | } | |
681 | ||
682 | err_ret: | |
193de0c7 | 683 | for_each_possible_cpu(i) { |
3b2d9942 VP |
684 | pr = processors[i]; |
685 | if (!pr || !pr->performance) | |
686 | continue; | |
687 | ||
688 | /* Assume no coordination on any error parsing domain info */ | |
689 | if (retval) { | |
690 | cpus_clear(pr->performance->shared_cpu_map); | |
691 | cpu_set(i, pr->performance->shared_cpu_map); | |
692 | pr->performance->shared_type = CPUFREQ_SHARED_TYPE_ALL; | |
693 | } | |
694 | pr->performance = NULL; /* Will be set for real in register */ | |
695 | } | |
696 | ||
785fcccd | 697 | mutex_unlock(&performance_mutex); |
9011bff4 | 698 | return retval; |
3b2d9942 VP |
699 | } |
700 | EXPORT_SYMBOL(acpi_processor_preregister_performance); | |
701 | ||
702 | ||
1da177e4 | 703 | int |
4be44fcd LB |
704 | acpi_processor_register_performance(struct acpi_processor_performance |
705 | *performance, unsigned int cpu) | |
1da177e4 LT |
706 | { |
707 | struct acpi_processor *pr; | |
708 | ||
1da177e4 LT |
709 | |
710 | if (!(acpi_processor_ppc_status & PPC_REGISTERED)) | |
d550d98d | 711 | return -EINVAL; |
1da177e4 | 712 | |
65c19bbd | 713 | mutex_lock(&performance_mutex); |
1da177e4 LT |
714 | |
715 | pr = processors[cpu]; | |
716 | if (!pr) { | |
65c19bbd | 717 | mutex_unlock(&performance_mutex); |
d550d98d | 718 | return -ENODEV; |
1da177e4 LT |
719 | } |
720 | ||
721 | if (pr->performance) { | |
65c19bbd | 722 | mutex_unlock(&performance_mutex); |
d550d98d | 723 | return -EBUSY; |
1da177e4 LT |
724 | } |
725 | ||
a913f507 AM |
726 | WARN_ON(!performance); |
727 | ||
1da177e4 LT |
728 | pr->performance = performance; |
729 | ||
730 | if (acpi_processor_get_performance_info(pr)) { | |
731 | pr->performance = NULL; | |
65c19bbd | 732 | mutex_unlock(&performance_mutex); |
d550d98d | 733 | return -EIO; |
1da177e4 LT |
734 | } |
735 | ||
736 | acpi_cpufreq_add_file(pr); | |
737 | ||
65c19bbd | 738 | mutex_unlock(&performance_mutex); |
d550d98d | 739 | return 0; |
1da177e4 | 740 | } |
1da177e4 | 741 | |
4be44fcd | 742 | EXPORT_SYMBOL(acpi_processor_register_performance); |
1da177e4 LT |
743 | |
744 | void | |
4be44fcd LB |
745 | acpi_processor_unregister_performance(struct acpi_processor_performance |
746 | *performance, unsigned int cpu) | |
1da177e4 LT |
747 | { |
748 | struct acpi_processor *pr; | |
749 | ||
1da177e4 | 750 | |
65c19bbd | 751 | mutex_lock(&performance_mutex); |
1da177e4 LT |
752 | |
753 | pr = processors[cpu]; | |
754 | if (!pr) { | |
65c19bbd | 755 | mutex_unlock(&performance_mutex); |
d550d98d | 756 | return; |
1da177e4 LT |
757 | } |
758 | ||
a913f507 AM |
759 | if (pr->performance) |
760 | kfree(pr->performance->states); | |
1da177e4 LT |
761 | pr->performance = NULL; |
762 | ||
763 | acpi_cpufreq_remove_file(pr); | |
764 | ||
65c19bbd | 765 | mutex_unlock(&performance_mutex); |
1da177e4 | 766 | |
d550d98d | 767 | return; |
1da177e4 | 768 | } |
4be44fcd | 769 | |
1da177e4 | 770 | EXPORT_SYMBOL(acpi_processor_unregister_performance); |