]>
Commit | Line | Data |
---|---|---|
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 | ||
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 | |
35 | #include <asm/cpufeature.h> | |
36 | #endif | |
37 | ||
38 | #include <acpi/acpi_bus.h> | |
39 | #include <acpi/acpi_drivers.h> | |
40 | #include <acpi/processor.h> | |
41 | ||
42 | #define ACPI_PROCESSOR_CLASS "processor" | |
43 | #define ACPI_PROCESSOR_FILE_PERFORMANCE "performance" | |
44 | #define _COMPONENT ACPI_PROCESSOR_COMPONENT | |
45 | ACPI_MODULE_NAME("processor_perflib"); | |
46 | ||
47 | static DEFINE_MUTEX(performance_mutex); | |
48 | ||
49 | /* Use cpufreq debug layer for _PPC changes. */ | |
50 | #define cpufreq_printk(msg...) cpufreq_debug_printk(CPUFREQ_DEBUG_CORE, \ | |
51 | "cpufreq-core", msg) | |
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 | /* ignore_ppc: | |
64 | * -1 -> cpufreq low level drivers not initialized -> _PSS, etc. not called yet | |
65 | * ignore _PPC | |
66 | * 0 -> cpufreq low level drivers initialized -> consider _PPC values | |
67 | * 1 -> ignore _PPC totally -> forced by user through boot param | |
68 | */ | |
69 | static int ignore_ppc = -1; | |
70 | module_param(ignore_ppc, int, 0644); | |
71 | MODULE_PARM_DESC(ignore_ppc, "If the frequency of your machine gets wrongly" \ | |
72 | "limited by BIOS, this should help"); | |
73 | ||
74 | #define PPC_REGISTERED 1 | |
75 | #define PPC_IN_USE 2 | |
76 | ||
77 | static int acpi_processor_ppc_status; | |
78 | ||
79 | static int acpi_processor_ppc_notifier(struct notifier_block *nb, | |
80 | unsigned long event, void *data) | |
81 | { | |
82 | struct cpufreq_policy *policy = data; | |
83 | struct acpi_processor *pr; | |
84 | unsigned int ppc = 0; | |
85 | ||
86 | if (event == CPUFREQ_START && ignore_ppc <= 0) { | |
87 | ignore_ppc = 0; | |
88 | return 0; | |
89 | } | |
90 | ||
91 | if (ignore_ppc) | |
92 | return 0; | |
93 | ||
94 | if (event != CPUFREQ_INCOMPATIBLE) | |
95 | return 0; | |
96 | ||
97 | mutex_lock(&performance_mutex); | |
98 | ||
99 | pr = per_cpu(processors, policy->cpu); | |
100 | if (!pr || !pr->performance) | |
101 | goto out; | |
102 | ||
103 | ppc = (unsigned int)pr->performance_platform_limit; | |
104 | ||
105 | if (ppc >= pr->performance->state_count) | |
106 | goto out; | |
107 | ||
108 | cpufreq_verify_within_limits(policy, 0, | |
109 | pr->performance->states[ppc]. | |
110 | core_frequency * 1000); | |
111 | ||
112 | out: | |
113 | mutex_unlock(&performance_mutex); | |
114 | ||
115 | return 0; | |
116 | } | |
117 | ||
118 | static struct notifier_block acpi_ppc_notifier_block = { | |
119 | .notifier_call = acpi_processor_ppc_notifier, | |
120 | }; | |
121 | ||
122 | static int acpi_processor_get_platform_limit(struct acpi_processor *pr) | |
123 | { | |
124 | acpi_status status = 0; | |
125 | unsigned long long ppc = 0; | |
126 | ||
127 | ||
128 | if (!pr) | |
129 | return -EINVAL; | |
130 | ||
131 | /* | |
132 | * _PPC indicates the maximum state currently supported by the platform | |
133 | * (e.g. 0 = states 0..n; 1 = states 1..n; etc. | |
134 | */ | |
135 | status = acpi_evaluate_integer(pr->handle, "_PPC", NULL, &ppc); | |
136 | ||
137 | if (status != AE_NOT_FOUND) | |
138 | acpi_processor_ppc_status |= PPC_IN_USE; | |
139 | ||
140 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { | |
141 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PPC")); | |
142 | return -ENODEV; | |
143 | } | |
144 | ||
145 | cpufreq_printk("CPU %d: _PPC is %d - frequency %s limited\n", pr->id, | |
146 | (int)ppc, ppc ? "" : "not"); | |
147 | ||
148 | pr->performance_platform_limit = (int)ppc; | |
149 | ||
150 | return 0; | |
151 | } | |
152 | ||
153 | int acpi_processor_ppc_has_changed(struct acpi_processor *pr) | |
154 | { | |
155 | int ret; | |
156 | ||
157 | if (ignore_ppc) | |
158 | return 0; | |
159 | ||
160 | ret = acpi_processor_get_platform_limit(pr); | |
161 | ||
162 | if (ret < 0) | |
163 | return (ret); | |
164 | else | |
165 | return cpufreq_update_policy(pr->id); | |
166 | } | |
167 | ||
168 | void acpi_processor_ppc_init(void) | |
169 | { | |
170 | if (!cpufreq_register_notifier | |
171 | (&acpi_ppc_notifier_block, CPUFREQ_POLICY_NOTIFIER)) | |
172 | acpi_processor_ppc_status |= PPC_REGISTERED; | |
173 | else | |
174 | printk(KERN_DEBUG | |
175 | "Warning: Processor Platform Limit not supported.\n"); | |
176 | } | |
177 | ||
178 | void acpi_processor_ppc_exit(void) | |
179 | { | |
180 | if (acpi_processor_ppc_status & PPC_REGISTERED) | |
181 | cpufreq_unregister_notifier(&acpi_ppc_notifier_block, | |
182 | CPUFREQ_POLICY_NOTIFIER); | |
183 | ||
184 | acpi_processor_ppc_status &= ~PPC_REGISTERED; | |
185 | } | |
186 | ||
187 | static int acpi_processor_get_performance_control(struct acpi_processor *pr) | |
188 | { | |
189 | int result = 0; | |
190 | acpi_status status = 0; | |
191 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
192 | union acpi_object *pct = NULL; | |
193 | union acpi_object obj = { 0 }; | |
194 | ||
195 | ||
196 | status = acpi_evaluate_object(pr->handle, "_PCT", NULL, &buffer); | |
197 | if (ACPI_FAILURE(status)) { | |
198 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PCT")); | |
199 | return -ENODEV; | |
200 | } | |
201 | ||
202 | pct = (union acpi_object *)buffer.pointer; | |
203 | if (!pct || (pct->type != ACPI_TYPE_PACKAGE) | |
204 | || (pct->package.count != 2)) { | |
205 | printk(KERN_ERR PREFIX "Invalid _PCT data\n"); | |
206 | result = -EFAULT; | |
207 | goto end; | |
208 | } | |
209 | ||
210 | /* | |
211 | * control_register | |
212 | */ | |
213 | ||
214 | obj = pct->package.elements[0]; | |
215 | ||
216 | if ((obj.type != ACPI_TYPE_BUFFER) | |
217 | || (obj.buffer.length < sizeof(struct acpi_pct_register)) | |
218 | || (obj.buffer.pointer == NULL)) { | |
219 | printk(KERN_ERR PREFIX "Invalid _PCT data (control_register)\n"); | |
220 | result = -EFAULT; | |
221 | goto end; | |
222 | } | |
223 | memcpy(&pr->performance->control_register, obj.buffer.pointer, | |
224 | sizeof(struct acpi_pct_register)); | |
225 | ||
226 | /* | |
227 | * status_register | |
228 | */ | |
229 | ||
230 | obj = pct->package.elements[1]; | |
231 | ||
232 | if ((obj.type != ACPI_TYPE_BUFFER) | |
233 | || (obj.buffer.length < sizeof(struct acpi_pct_register)) | |
234 | || (obj.buffer.pointer == NULL)) { | |
235 | printk(KERN_ERR PREFIX "Invalid _PCT data (status_register)\n"); | |
236 | result = -EFAULT; | |
237 | goto end; | |
238 | } | |
239 | ||
240 | memcpy(&pr->performance->status_register, obj.buffer.pointer, | |
241 | sizeof(struct acpi_pct_register)); | |
242 | ||
243 | end: | |
244 | kfree(buffer.pointer); | |
245 | ||
246 | return result; | |
247 | } | |
248 | ||
249 | static int acpi_processor_get_performance_states(struct acpi_processor *pr) | |
250 | { | |
251 | int result = 0; | |
252 | acpi_status status = AE_OK; | |
253 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
254 | struct acpi_buffer format = { sizeof("NNNNNN"), "NNNNNN" }; | |
255 | struct acpi_buffer state = { 0, NULL }; | |
256 | union acpi_object *pss = NULL; | |
257 | int i; | |
258 | ||
259 | ||
260 | status = acpi_evaluate_object(pr->handle, "_PSS", NULL, &buffer); | |
261 | if (ACPI_FAILURE(status)) { | |
262 | ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PSS")); | |
263 | return -ENODEV; | |
264 | } | |
265 | ||
266 | pss = buffer.pointer; | |
267 | if (!pss || (pss->type != ACPI_TYPE_PACKAGE)) { | |
268 | printk(KERN_ERR PREFIX "Invalid _PSS data\n"); | |
269 | result = -EFAULT; | |
270 | goto end; | |
271 | } | |
272 | ||
273 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found %d performance states\n", | |
274 | pss->package.count)); | |
275 | ||
276 | pr->performance->state_count = pss->package.count; | |
277 | pr->performance->states = | |
278 | kmalloc(sizeof(struct acpi_processor_px) * pss->package.count, | |
279 | GFP_KERNEL); | |
280 | if (!pr->performance->states) { | |
281 | result = -ENOMEM; | |
282 | goto end; | |
283 | } | |
284 | ||
285 | for (i = 0; i < pr->performance->state_count; i++) { | |
286 | ||
287 | struct acpi_processor_px *px = &(pr->performance->states[i]); | |
288 | ||
289 | state.length = sizeof(struct acpi_processor_px); | |
290 | state.pointer = px; | |
291 | ||
292 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Extracting state %d\n", i)); | |
293 | ||
294 | status = acpi_extract_package(&(pss->package.elements[i]), | |
295 | &format, &state); | |
296 | if (ACPI_FAILURE(status)) { | |
297 | ACPI_EXCEPTION((AE_INFO, status, "Invalid _PSS data")); | |
298 | result = -EFAULT; | |
299 | kfree(pr->performance->states); | |
300 | goto end; | |
301 | } | |
302 | ||
303 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
304 | "State [%d]: core_frequency[%d] power[%d] transition_latency[%d] bus_master_latency[%d] control[0x%x] status[0x%x]\n", | |
305 | i, | |
306 | (u32) px->core_frequency, | |
307 | (u32) px->power, | |
308 | (u32) px->transition_latency, | |
309 | (u32) px->bus_master_latency, | |
310 | (u32) px->control, (u32) px->status)); | |
311 | ||
312 | if (!px->core_frequency) { | |
313 | printk(KERN_ERR PREFIX | |
314 | "Invalid _PSS data: freq is zero\n"); | |
315 | result = -EFAULT; | |
316 | kfree(pr->performance->states); | |
317 | goto end; | |
318 | } | |
319 | } | |
320 | ||
321 | end: | |
322 | kfree(buffer.pointer); | |
323 | ||
324 | return result; | |
325 | } | |
326 | ||
327 | static int acpi_processor_get_performance_info(struct acpi_processor *pr) | |
328 | { | |
329 | int result = 0; | |
330 | acpi_status status = AE_OK; | |
331 | acpi_handle handle = NULL; | |
332 | ||
333 | if (!pr || !pr->performance || !pr->handle) | |
334 | return -EINVAL; | |
335 | ||
336 | status = acpi_get_handle(pr->handle, "_PCT", &handle); | |
337 | if (ACPI_FAILURE(status)) { | |
338 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
339 | "ACPI-based processor performance control unavailable\n")); | |
340 | return -ENODEV; | |
341 | } | |
342 | ||
343 | result = acpi_processor_get_performance_control(pr); | |
344 | if (result) | |
345 | goto update_bios; | |
346 | ||
347 | result = acpi_processor_get_performance_states(pr); | |
348 | if (result) | |
349 | goto update_bios; | |
350 | ||
351 | return 0; | |
352 | ||
353 | /* | |
354 | * Having _PPC but missing frequencies (_PSS, _PCT) is a very good hint that | |
355 | * the BIOS is older than the CPU and does not know its frequencies | |
356 | */ | |
357 | update_bios: | |
358 | #ifdef CONFIG_X86 | |
359 | if (ACPI_SUCCESS(acpi_get_handle(pr->handle, "_PPC", &handle))){ | |
360 | if(boot_cpu_has(X86_FEATURE_EST)) | |
361 | printk(KERN_WARNING FW_BUG "BIOS needs update for CPU " | |
362 | "frequency support\n"); | |
363 | } | |
364 | #endif | |
365 | return result; | |
366 | } | |
367 | ||
368 | int acpi_processor_notify_smm(struct module *calling_module) | |
369 | { | |
370 | acpi_status status; | |
371 | static int is_done = 0; | |
372 | ||
373 | ||
374 | if (!(acpi_processor_ppc_status & PPC_REGISTERED)) | |
375 | return -EBUSY; | |
376 | ||
377 | if (!try_module_get(calling_module)) | |
378 | return -EINVAL; | |
379 | ||
380 | /* is_done is set to negative if an error occured, | |
381 | * and to postitive if _no_ error occured, but SMM | |
382 | * was already notified. This avoids double notification | |
383 | * which might lead to unexpected results... | |
384 | */ | |
385 | if (is_done > 0) { | |
386 | module_put(calling_module); | |
387 | return 0; | |
388 | } else if (is_done < 0) { | |
389 | module_put(calling_module); | |
390 | return is_done; | |
391 | } | |
392 | ||
393 | is_done = -EIO; | |
394 | ||
395 | /* Can't write pstate_control to smi_command if either value is zero */ | |
396 | if ((!acpi_gbl_FADT.smi_command) || (!acpi_gbl_FADT.pstate_control)) { | |
397 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No SMI port or pstate_control\n")); | |
398 | module_put(calling_module); | |
399 | return 0; | |
400 | } | |
401 | ||
402 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
403 | "Writing pstate_control [0x%x] to smi_command [0x%x]\n", | |
404 | acpi_gbl_FADT.pstate_control, acpi_gbl_FADT.smi_command)); | |
405 | ||
406 | status = acpi_os_write_port(acpi_gbl_FADT.smi_command, | |
407 | (u32) acpi_gbl_FADT.pstate_control, 8); | |
408 | if (ACPI_FAILURE(status)) { | |
409 | ACPI_EXCEPTION((AE_INFO, status, | |
410 | "Failed to write pstate_control [0x%x] to " | |
411 | "smi_command [0x%x]", acpi_gbl_FADT.pstate_control, | |
412 | acpi_gbl_FADT.smi_command)); | |
413 | module_put(calling_module); | |
414 | return status; | |
415 | } | |
416 | ||
417 | /* Success. If there's no _PPC, we need to fear nothing, so | |
418 | * we can allow the cpufreq driver to be rmmod'ed. */ | |
419 | is_done = 1; | |
420 | ||
421 | if (!(acpi_processor_ppc_status & PPC_IN_USE)) | |
422 | module_put(calling_module); | |
423 | ||
424 | return 0; | |
425 | } | |
426 | ||
427 | EXPORT_SYMBOL(acpi_processor_notify_smm); | |
428 | ||
429 | static int acpi_processor_get_psd(struct acpi_processor *pr) | |
430 | { | |
431 | int result = 0; | |
432 | acpi_status status = AE_OK; | |
433 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; | |
434 | struct acpi_buffer format = {sizeof("NNNNN"), "NNNNN"}; | |
435 | struct acpi_buffer state = {0, NULL}; | |
436 | union acpi_object *psd = NULL; | |
437 | struct acpi_psd_package *pdomain; | |
438 | ||
439 | status = acpi_evaluate_object(pr->handle, "_PSD", NULL, &buffer); | |
440 | if (ACPI_FAILURE(status)) { | |
441 | return -ENODEV; | |
442 | } | |
443 | ||
444 | psd = buffer.pointer; | |
445 | if (!psd || (psd->type != ACPI_TYPE_PACKAGE)) { | |
446 | printk(KERN_ERR PREFIX "Invalid _PSD data\n"); | |
447 | result = -EFAULT; | |
448 | goto end; | |
449 | } | |
450 | ||
451 | if (psd->package.count != 1) { | |
452 | printk(KERN_ERR PREFIX "Invalid _PSD data\n"); | |
453 | result = -EFAULT; | |
454 | goto end; | |
455 | } | |
456 | ||
457 | pdomain = &(pr->performance->domain_info); | |
458 | ||
459 | state.length = sizeof(struct acpi_psd_package); | |
460 | state.pointer = pdomain; | |
461 | ||
462 | status = acpi_extract_package(&(psd->package.elements[0]), | |
463 | &format, &state); | |
464 | if (ACPI_FAILURE(status)) { | |
465 | printk(KERN_ERR PREFIX "Invalid _PSD data\n"); | |
466 | result = -EFAULT; | |
467 | goto end; | |
468 | } | |
469 | ||
470 | if (pdomain->num_entries != ACPI_PSD_REV0_ENTRIES) { | |
471 | printk(KERN_ERR PREFIX "Unknown _PSD:num_entries\n"); | |
472 | result = -EFAULT; | |
473 | goto end; | |
474 | } | |
475 | ||
476 | if (pdomain->revision != ACPI_PSD_REV0_REVISION) { | |
477 | printk(KERN_ERR PREFIX "Unknown _PSD:revision\n"); | |
478 | result = -EFAULT; | |
479 | goto end; | |
480 | } | |
481 | ||
482 | if (pdomain->coord_type != DOMAIN_COORD_TYPE_SW_ALL && | |
483 | pdomain->coord_type != DOMAIN_COORD_TYPE_SW_ANY && | |
484 | pdomain->coord_type != DOMAIN_COORD_TYPE_HW_ALL) { | |
485 | printk(KERN_ERR PREFIX "Invalid _PSD:coord_type\n"); | |
486 | result = -EFAULT; | |
487 | goto end; | |
488 | } | |
489 | end: | |
490 | kfree(buffer.pointer); | |
491 | return result; | |
492 | } | |
493 | ||
494 | int acpi_processor_preregister_performance( | |
495 | struct acpi_processor_performance *performance) | |
496 | { | |
497 | int count, count_target; | |
498 | int retval = 0; | |
499 | unsigned int i, j; | |
500 | cpumask_var_t covered_cpus; | |
501 | struct acpi_processor *pr; | |
502 | struct acpi_psd_package *pdomain; | |
503 | struct acpi_processor *match_pr; | |
504 | struct acpi_psd_package *match_pdomain; | |
505 | ||
506 | if (!alloc_cpumask_var(&covered_cpus, GFP_KERNEL)) | |
507 | return -ENOMEM; | |
508 | ||
509 | mutex_lock(&performance_mutex); | |
510 | ||
511 | /* | |
512 | * Check if another driver has already registered, and abort before | |
513 | * changing pr->performance if it has. Check input data as well. | |
514 | */ | |
515 | for_each_possible_cpu(i) { | |
516 | pr = per_cpu(processors, i); | |
517 | if (!pr) { | |
518 | /* Look only at processors in ACPI namespace */ | |
519 | continue; | |
520 | } | |
521 | ||
522 | if (pr->performance) { | |
523 | retval = -EBUSY; | |
524 | goto err_out; | |
525 | } | |
526 | ||
527 | if (!performance || !per_cpu_ptr(performance, i)) { | |
528 | retval = -EINVAL; | |
529 | goto err_out; | |
530 | } | |
531 | } | |
532 | ||
533 | /* Call _PSD for all CPUs */ | |
534 | for_each_possible_cpu(i) { | |
535 | pr = per_cpu(processors, i); | |
536 | if (!pr) | |
537 | continue; | |
538 | ||
539 | pr->performance = per_cpu_ptr(performance, i); | |
540 | cpumask_set_cpu(i, pr->performance->shared_cpu_map); | |
541 | if (acpi_processor_get_psd(pr)) { | |
542 | retval = -EINVAL; | |
543 | continue; | |
544 | } | |
545 | } | |
546 | if (retval) | |
547 | goto err_ret; | |
548 | ||
549 | /* | |
550 | * Now that we have _PSD data from all CPUs, lets setup P-state | |
551 | * domain info. | |
552 | */ | |
553 | cpumask_clear(covered_cpus); | |
554 | for_each_possible_cpu(i) { | |
555 | pr = per_cpu(processors, i); | |
556 | if (!pr) | |
557 | continue; | |
558 | ||
559 | if (cpumask_test_cpu(i, covered_cpus)) | |
560 | continue; | |
561 | ||
562 | pdomain = &(pr->performance->domain_info); | |
563 | cpumask_set_cpu(i, pr->performance->shared_cpu_map); | |
564 | cpumask_set_cpu(i, covered_cpus); | |
565 | if (pdomain->num_processors <= 1) | |
566 | continue; | |
567 | ||
568 | /* Validate the Domain info */ | |
569 | count_target = pdomain->num_processors; | |
570 | count = 1; | |
571 | if (pdomain->coord_type == DOMAIN_COORD_TYPE_SW_ALL) | |
572 | pr->performance->shared_type = CPUFREQ_SHARED_TYPE_ALL; | |
573 | else if (pdomain->coord_type == DOMAIN_COORD_TYPE_HW_ALL) | |
574 | pr->performance->shared_type = CPUFREQ_SHARED_TYPE_HW; | |
575 | else if (pdomain->coord_type == DOMAIN_COORD_TYPE_SW_ANY) | |
576 | pr->performance->shared_type = CPUFREQ_SHARED_TYPE_ANY; | |
577 | ||
578 | for_each_possible_cpu(j) { | |
579 | if (i == j) | |
580 | continue; | |
581 | ||
582 | match_pr = per_cpu(processors, j); | |
583 | if (!match_pr) | |
584 | continue; | |
585 | ||
586 | match_pdomain = &(match_pr->performance->domain_info); | |
587 | if (match_pdomain->domain != pdomain->domain) | |
588 | continue; | |
589 | ||
590 | /* Here i and j are in the same domain */ | |
591 | ||
592 | if (match_pdomain->num_processors != count_target) { | |
593 | retval = -EINVAL; | |
594 | goto err_ret; | |
595 | } | |
596 | ||
597 | if (pdomain->coord_type != match_pdomain->coord_type) { | |
598 | retval = -EINVAL; | |
599 | goto err_ret; | |
600 | } | |
601 | ||
602 | cpumask_set_cpu(j, covered_cpus); | |
603 | cpumask_set_cpu(j, pr->performance->shared_cpu_map); | |
604 | count++; | |
605 | } | |
606 | ||
607 | for_each_possible_cpu(j) { | |
608 | if (i == j) | |
609 | continue; | |
610 | ||
611 | match_pr = per_cpu(processors, j); | |
612 | if (!match_pr) | |
613 | continue; | |
614 | ||
615 | match_pdomain = &(match_pr->performance->domain_info); | |
616 | if (match_pdomain->domain != pdomain->domain) | |
617 | continue; | |
618 | ||
619 | match_pr->performance->shared_type = | |
620 | pr->performance->shared_type; | |
621 | cpumask_copy(match_pr->performance->shared_cpu_map, | |
622 | pr->performance->shared_cpu_map); | |
623 | } | |
624 | } | |
625 | ||
626 | err_ret: | |
627 | for_each_possible_cpu(i) { | |
628 | pr = per_cpu(processors, i); | |
629 | if (!pr || !pr->performance) | |
630 | continue; | |
631 | ||
632 | /* Assume no coordination on any error parsing domain info */ | |
633 | if (retval) { | |
634 | cpumask_clear(pr->performance->shared_cpu_map); | |
635 | cpumask_set_cpu(i, pr->performance->shared_cpu_map); | |
636 | pr->performance->shared_type = CPUFREQ_SHARED_TYPE_ALL; | |
637 | } | |
638 | pr->performance = NULL; /* Will be set for real in register */ | |
639 | } | |
640 | ||
641 | err_out: | |
642 | mutex_unlock(&performance_mutex); | |
643 | free_cpumask_var(covered_cpus); | |
644 | return retval; | |
645 | } | |
646 | EXPORT_SYMBOL(acpi_processor_preregister_performance); | |
647 | ||
648 | int | |
649 | acpi_processor_register_performance(struct acpi_processor_performance | |
650 | *performance, unsigned int cpu) | |
651 | { | |
652 | struct acpi_processor *pr; | |
653 | ||
654 | if (!(acpi_processor_ppc_status & PPC_REGISTERED)) | |
655 | return -EINVAL; | |
656 | ||
657 | mutex_lock(&performance_mutex); | |
658 | ||
659 | pr = per_cpu(processors, cpu); | |
660 | if (!pr) { | |
661 | mutex_unlock(&performance_mutex); | |
662 | return -ENODEV; | |
663 | } | |
664 | ||
665 | if (pr->performance) { | |
666 | mutex_unlock(&performance_mutex); | |
667 | return -EBUSY; | |
668 | } | |
669 | ||
670 | WARN_ON(!performance); | |
671 | ||
672 | pr->performance = performance; | |
673 | ||
674 | if (acpi_processor_get_performance_info(pr)) { | |
675 | pr->performance = NULL; | |
676 | mutex_unlock(&performance_mutex); | |
677 | return -EIO; | |
678 | } | |
679 | ||
680 | mutex_unlock(&performance_mutex); | |
681 | return 0; | |
682 | } | |
683 | ||
684 | EXPORT_SYMBOL(acpi_processor_register_performance); | |
685 | ||
686 | void | |
687 | acpi_processor_unregister_performance(struct acpi_processor_performance | |
688 | *performance, unsigned int cpu) | |
689 | { | |
690 | struct acpi_processor *pr; | |
691 | ||
692 | mutex_lock(&performance_mutex); | |
693 | ||
694 | pr = per_cpu(processors, cpu); | |
695 | if (!pr) { | |
696 | mutex_unlock(&performance_mutex); | |
697 | return; | |
698 | } | |
699 | ||
700 | if (pr->performance) | |
701 | kfree(pr->performance->states); | |
702 | pr->performance = NULL; | |
703 | ||
704 | mutex_unlock(&performance_mutex); | |
705 | ||
706 | return; | |
707 | } | |
708 | ||
709 | EXPORT_SYMBOL(acpi_processor_unregister_performance); |