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ACPICA: minimal patch to integrate new tables into Linux
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / acpi / processor_perflib.c
CommitLineData
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"
47#define ACPI_PROCESSOR_DRIVER_NAME "ACPI Processor Driver"
48#define ACPI_PROCESSOR_FILE_PERFORMANCE "performance"
49#define _COMPONENT ACPI_PROCESSOR_COMPONENT
4be44fcd 50ACPI_MODULE_NAME("acpi_processor")
1da177e4 51
65c19bbd 52static DEFINE_MUTEX(performance_mutex);
1da177e4
LT		 53
54/*
55 * _PPC support is implemented as a CPUfreq policy notifier:
56 * This means each time a CPUfreq driver registered also with
57 * the ACPI core is asked to change the speed policy, the maximum
58 * value is adjusted so that it is within the platform limit.
59 *
60 * Also, when a new platform limit value is detected, the CPUfreq
61 * policy is adjusted accordingly.
62 */
63
64#define PPC_REGISTERED 1
65#define PPC_IN_USE 2
66
67static int acpi_processor_ppc_status = 0;
68
69static int acpi_processor_ppc_notifier(struct notifier_block *nb,
4be44fcd 70 unsigned long event, void *data)
1da177e4
LT		 71{
72 struct cpufreq_policy *policy = data;
73 struct acpi_processor *pr;
74 unsigned int ppc = 0;
75
65c19bbd 76 mutex_lock(&performance_mutex);
1da177e4
LT		 77
78 if (event != CPUFREQ_INCOMPATIBLE)
79 goto out;
80
81 pr = processors[policy->cpu];
82 if (!pr || !pr->performance)
83 goto out;
84
4be44fcd 85 ppc = (unsigned int)pr->performance_platform_limit;
1da177e4 86
0916bd3e 87 if (ppc >= pr->performance->state_count)
1da177e4
LT		 88 goto out;
89
90 cpufreq_verify_within_limits(policy, 0,
4be44fcd
LB		 91 pr->performance->states[ppc].
92 core_frequency * 1000);
1da177e4 93
4be44fcd 94 out:
65c19bbd 95 mutex_unlock(&performance_mutex);
1da177e4
LT		 96
97 return 0;
98}
99
1da177e4
LT		 100static struct notifier_block acpi_ppc_notifier_block = {
101 .notifier_call = acpi_processor_ppc_notifier,
102};
103
4be44fcd 104static int acpi_processor_get_platform_limit(struct acpi_processor *pr)
1da177e4 105{
4be44fcd
LB		 106 acpi_status status = 0;
107 unsigned long ppc = 0;
1da177e4 108
1da177e4
LT		 109
110 if (!pr)
d550d98d 111 return -EINVAL;
1da177e4
LT		 112
113 /*
114 * _PPC indicates the maximum state currently supported by the platform
115 * (e.g. 0 = states 0..n; 1 = states 1..n; etc.
116 */
117 status = acpi_evaluate_integer(pr->handle, "_PPC", NULL, &ppc);
118
119 if (status != AE_NOT_FOUND)
120 acpi_processor_ppc_status |= PPC_IN_USE;
121
4be44fcd 122 if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
a6fc6720 123 ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PPC"));
d550d98d 124 return -ENODEV;
1da177e4
LT		 125 }
126
4be44fcd 127 pr->performance_platform_limit = (int)ppc;
1da177e4 128
d550d98d 129 return 0;
1da177e4
LT		 130}
131
4be44fcd 132int acpi_processor_ppc_has_changed(struct acpi_processor *pr)
1da177e4
LT		 133{
134 int ret = acpi_processor_get_platform_limit(pr);
135 if (ret < 0)
136 return (ret);
137 else
138 return cpufreq_update_policy(pr->id);
139}
140
4be44fcd
LB		 141void acpi_processor_ppc_init(void)
142{
143 if (!cpufreq_register_notifier
144 (&acpi_ppc_notifier_block, CPUFREQ_POLICY_NOTIFIER))
1da177e4
LT		 145 acpi_processor_ppc_status |= PPC_REGISTERED;
146 else
4be44fcd
LB		 147 printk(KERN_DEBUG
148 "Warning: Processor Platform Limit not supported.\n");
1da177e4
LT		 149}
150
4be44fcd
LB		 151void acpi_processor_ppc_exit(void)
152{
1da177e4 153 if (acpi_processor_ppc_status & PPC_REGISTERED)
4be44fcd
LB		 154 cpufreq_unregister_notifier(&acpi_ppc_notifier_block,
155 CPUFREQ_POLICY_NOTIFIER);
1da177e4
LT		 156
157 acpi_processor_ppc_status &= ~PPC_REGISTERED;
158}
159
4be44fcd 160static int acpi_processor_get_performance_control(struct acpi_processor *pr)
1da177e4 161{
4be44fcd
LB		 162 int result = 0;
163 acpi_status status = 0;
164 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
165 union acpi_object *pct = NULL;
166 union acpi_object obj = { 0 };
1da177e4 167
1da177e4
LT		 168
169 status = acpi_evaluate_object(pr->handle, "_PCT", NULL, &buffer);
4be44fcd 170 if (ACPI_FAILURE(status)) {
a6fc6720 171 ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PCT"));
d550d98d 172 return -ENODEV;
1da177e4
LT		 173 }
174
4be44fcd 175 pct = (union acpi_object *)buffer.pointer;
1da177e4 176 if (!pct || (pct->type != ACPI_TYPE_PACKAGE)
4be44fcd 177 || (pct->package.count != 2)) {
6468463a 178 printk(KERN_ERR PREFIX "Invalid _PCT data\n");
1da177e4
LT		 179 result = -EFAULT;
180 goto end;
181 }
182
183 /*
184 * control_register
185 */
186
187 obj = pct->package.elements[0];
188
189 if ((obj.type != ACPI_TYPE_BUFFER)
4be44fcd
LB		 190 || (obj.buffer.length < sizeof(struct acpi_pct_register))
191 || (obj.buffer.pointer == NULL)) {
6468463a 192 printk(KERN_ERR PREFIX "Invalid _PCT data (control_register)\n");
1da177e4
LT		 193 result = -EFAULT;
194 goto end;
195 }
4be44fcd
LB		 196 memcpy(&pr->performance->control_register, obj.buffer.pointer,
197 sizeof(struct acpi_pct_register));
1da177e4
LT		 198
199 /*
200 * status_register
201 */
202
203 obj = pct->package.elements[1];
204
205 if ((obj.type != ACPI_TYPE_BUFFER)
4be44fcd
LB		 206 || (obj.buffer.length < sizeof(struct acpi_pct_register))
207 || (obj.buffer.pointer == NULL)) {
6468463a 208 printk(KERN_ERR PREFIX "Invalid _PCT data (status_register)\n");
1da177e4
LT		 209 result = -EFAULT;
210 goto end;
211 }
212
4be44fcd
LB		 213 memcpy(&pr->performance->status_register, obj.buffer.pointer,
214 sizeof(struct acpi_pct_register));
1da177e4 215
4be44fcd 216 end:
02438d87 217 kfree(buffer.pointer);
1da177e4 218
d550d98d 219 return result;
1da177e4
LT		 220}
221
4be44fcd 222static int acpi_processor_get_performance_states(struct acpi_processor *pr)
1da177e4 223{
4be44fcd
LB		 224 int result = 0;
225 acpi_status status = AE_OK;
226 struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
227 struct acpi_buffer format = { sizeof("NNNNNN"), "NNNNNN" };
228 struct acpi_buffer state = { 0, NULL };
229 union acpi_object *pss = NULL;
230 int i;
1da177e4 231
1da177e4
LT		 232
233 status = acpi_evaluate_object(pr->handle, "_PSS", NULL, &buffer);
4be44fcd 234 if (ACPI_FAILURE(status)) {
a6fc6720 235 ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PSS"));
d550d98d 236 return -ENODEV;
1da177e4
LT		 237 }
238
50dd0969 239 pss = buffer.pointer;
1da177e4 240 if (!pss || (pss->type != ACPI_TYPE_PACKAGE)) {
6468463a 241 printk(KERN_ERR PREFIX "Invalid _PSS data\n");
1da177e4
LT		 242 result = -EFAULT;
243 goto end;
244 }
245
246 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found %d performance states\n",
4be44fcd 247 pss->package.count));
1da177e4
LT		 248
249 pr->performance->state_count = pss->package.count;
4be44fcd
LB		 250 pr->performance->states =
251 kmalloc(sizeof(struct acpi_processor_px) * pss->package.count,
252 GFP_KERNEL);
1da177e4
LT		 253 if (!pr->performance->states) {
254 result = -ENOMEM;
255 goto end;
256 }
257
258 for (i = 0; i < pr->performance->state_count; i++) {
259
260 struct acpi_processor_px *px = &(pr->performance->states[i]);
261
262 state.length = sizeof(struct acpi_processor_px);
263 state.pointer = px;
264
265 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Extracting state %d\n", i));
266
267 status = acpi_extract_package(&(pss->package.elements[i]),
4be44fcd 268 &format, &state);
1da177e4 269 if (ACPI_FAILURE(status)) {
a6fc6720 270 ACPI_EXCEPTION((AE_INFO, status, "Invalid _PSS data"));
1da177e4
LT		 271 result = -EFAULT;
272 kfree(pr->performance->states);
273 goto end;
274 }
275
276 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
4be44fcd
LB		 277 "State [%d]: core_frequency[%d] power[%d] transition_latency[%d] bus_master_latency[%d] control[0x%x] status[0x%x]\n",
278 i,
279 (u32) px->core_frequency,
280 (u32) px->power,
281 (u32) px->transition_latency,
282 (u32) px->bus_master_latency,
283 (u32) px->control, (u32) px->status));
1da177e4
LT		 284
285 if (!px->core_frequency) {
6468463a
LB		 286 printk(KERN_ERR PREFIX
287 "Invalid _PSS data: freq is zero\n");
1da177e4
LT		 288 result = -EFAULT;
289 kfree(pr->performance->states);
290 goto end;
291 }
292 }
293
4be44fcd 294 end:
02438d87 295 kfree(buffer.pointer);
1da177e4 296
d550d98d 297 return result;
1da177e4
LT		 298}
299
4be44fcd 300static int acpi_processor_get_performance_info(struct acpi_processor *pr)
1da177e4 301{
4be44fcd
LB		 302 int result = 0;
303 acpi_status status = AE_OK;
304 acpi_handle handle = NULL;
1da177e4 305
1da177e4
LT		 306
307 if (!pr || !pr->performance || !pr->handle)
d550d98d 308 return -EINVAL;
1da177e4 309
1da177e4
LT		 310 status = acpi_get_handle(pr->handle, "_PCT", &handle);
311 if (ACPI_FAILURE(status)) {
312 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
4be44fcd 313 "ACPI-based processor performance control unavailable\n"));
d550d98d 314 return -ENODEV;
1da177e4
LT		 315 }
316
317 result = acpi_processor_get_performance_control(pr);
318 if (result)
d550d98d 319 return result;
1da177e4
LT		 320
321 result = acpi_processor_get_performance_states(pr);
322 if (result)
d550d98d 323 return result;
1da177e4 324
d550d98d 325 return 0;
1da177e4
LT		 326}
327
4be44fcd
LB		 328int acpi_processor_notify_smm(struct module *calling_module)
329{
330 acpi_status status;
331 static int is_done = 0;
1da177e4 332
1da177e4
LT		 333
334 if (!(acpi_processor_ppc_status & PPC_REGISTERED))
d550d98d 335 return -EBUSY;
1da177e4
LT		 336
337 if (!try_module_get(calling_module))
d550d98d 338 return -EINVAL;
1da177e4
LT		 339
340 /* is_done is set to negative if an error occured,
341 * and to postitive if _no_ error occured, but SMM
342 * was already notified. This avoids double notification
343 * which might lead to unexpected results...
344 */
345 if (is_done > 0) {
346 module_put(calling_module);
d550d98d 347 return 0;
4be44fcd 348 } else if (is_done < 0) {
1da177e4 349 module_put(calling_module);
d550d98d 350 return is_done;
1da177e4
LT		 351 }
352
353 is_done = -EIO;
354
ad71860a
AS		 355 /* Can't write pstate_control to smi_command if either value is zero */
356 if ((!acpi_fadt.smi_command) || (!acpi_fadt.pstate_control)) {
357 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No SMI port or pstate_control\n"));
1da177e4 358 module_put(calling_module);
d550d98d 359 return 0;
1da177e4
LT		 360 }
361
4be44fcd 362 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
ad71860a
AS		 363 "Writing pstate_control [0x%x] to smi_command [0x%x]\n",
364 acpi_fadt.pstate_control, acpi_fadt.smi_command));
1da177e4 365
ad71860a
AS		 366 status = acpi_os_write_port(acpi_fadt.smi_command,
367 (u32) acpi_fadt.pstate_control, 8);
4be44fcd 368 if (ACPI_FAILURE(status)) {
a6fc6720 369 ACPI_EXCEPTION((AE_INFO, status,
ad71860a
AS		 370 "Failed to write pstate_control [0x%x] to "
371 "smi_command [0x%x]", acpi_fadt.pstate_control,
372 acpi_fadt.smi_command));
1da177e4 373 module_put(calling_module);
d550d98d 374 return status;
1da177e4
LT		 375 }
376
377 /* Success. If there's no _PPC, we need to fear nothing, so
378 * we can allow the cpufreq driver to be rmmod'ed. */
379 is_done = 1;
380
381 if (!(acpi_processor_ppc_status & PPC_IN_USE))
382 module_put(calling_module);
383
d550d98d 384 return 0;
1da177e4 385}
1da177e4 386
4be44fcd 387EXPORT_SYMBOL(acpi_processor_notify_smm);
1da177e4
LT		 388
389#ifdef CONFIG_X86_ACPI_CPUFREQ_PROC_INTF
390/* /proc/acpi/processor/../performance interface (DEPRECATED) */
391
392static int acpi_processor_perf_open_fs(struct inode *inode, struct file *file);
393static struct file_operations acpi_processor_perf_fops = {
4be44fcd
LB		 394 .open = acpi_processor_perf_open_fs,
395 .read = seq_read,
396 .llseek = seq_lseek,
397 .release = single_release,
1da177e4
LT		 398};
399
400static int acpi_processor_perf_seq_show(struct seq_file *seq, void *offset)
401{
50dd0969 402 struct acpi_processor *pr = seq->private;
4be44fcd 403 int i;
1da177e4 404
1da177e4
LT		 405
406 if (!pr)
407 goto end;
408
409 if (!pr->performance) {
410 seq_puts(seq, "<not supported>\n");
411 goto end;
412 }
413
414 seq_printf(seq, "state count: %d\n"
4be44fcd
LB		 415 "active state: P%d\n",
416 pr->performance->state_count, pr->performance->state);
1da177e4
LT		 417
418 seq_puts(seq, "states:\n");
419 for (i = 0; i < pr->performance->state_count; i++)
4be44fcd
LB		 420 seq_printf(seq,
421 " %cP%d: %d MHz, %d mW, %d uS\n",
422 (i == pr->performance->state ? '*' : ' '), i,
423 (u32) pr->performance->states[i].core_frequency,
424 (u32) pr->performance->states[i].power,
425 (u32) pr->performance->states[i].transition_latency);
426
427 end:
d550d98d 428 return 0;
1da177e4
LT		 429}
430
431static int acpi_processor_perf_open_fs(struct inode *inode, struct file *file)
432{
433 return single_open(file, acpi_processor_perf_seq_show,
4be44fcd 434 PDE(inode)->data);
1da177e4
LT		 435}
436
437static ssize_t
4be44fcd
LB		 438acpi_processor_write_performance(struct file *file,
439 const char __user * buffer,
440 size_t count, loff_t * data)
1da177e4 441{
4be44fcd 442 int result = 0;
50dd0969
JE		 443 struct seq_file *m = file->private_data;
444 struct acpi_processor *pr = m->private;
1da177e4 445 struct acpi_processor_performance *perf;
4be44fcd
LB		 446 char state_string[12] = { '\0' };
447 unsigned int new_state = 0;
448 struct cpufreq_policy policy;
1da177e4 449
1da177e4
LT		 450
451 if (!pr || (count > sizeof(state_string) - 1))
d550d98d 452 return -EINVAL;
1da177e4
LT		 453
454 perf = pr->performance;
455 if (!perf)
d550d98d 456 return -EINVAL;
1da177e4
LT		 457
458 if (copy_from_user(state_string, buffer, count))
d550d98d 459 return -EFAULT;
1da177e4
LT		 460
461 state_string[count] = '\0';
462 new_state = simple_strtoul(state_string, NULL, 0);
463
464 if (new_state >= perf->state_count)
d550d98d 465 return -EINVAL;
1da177e4
LT		 466
467 cpufreq_get_policy(&policy, pr->id);
468
469 policy.cpu = pr->id;
470 policy.min = perf->states[new_state].core_frequency * 1000;
471 policy.max = perf->states[new_state].core_frequency * 1000;
472
473 result = cpufreq_set_policy(&policy);
474 if (result)
d550d98d 475 return result;
1da177e4 476
d550d98d 477 return count;
1da177e4
LT		 478}
479
4be44fcd 480static void acpi_cpufreq_add_file(struct acpi_processor *pr)
1da177e4 481{
4be44fcd
LB		 482 struct proc_dir_entry *entry = NULL;
483 struct acpi_device *device = NULL;
1da177e4 484
1da177e4
LT		 485
486 if (acpi_bus_get_device(pr->handle, &device))
d550d98d 487 return;
1da177e4
LT		 488
489 /* add file 'performance' [R/W] */
490 entry = create_proc_entry(ACPI_PROCESSOR_FILE_PERFORMANCE,
4be44fcd
LB		 491 S_IFREG | S_IRUGO | S_IWUSR,
492 acpi_device_dir(device));
a6fc6720 493 if (entry){
d479e908 494 acpi_processor_perf_fops.write = acpi_processor_write_performance;
1da177e4 495 entry->proc_fops = &acpi_processor_perf_fops;
1da177e4
LT		 496 entry->data = acpi_driver_data(device);
497 entry->owner = THIS_MODULE;
498 }
d550d98d 499 return;
1da177e4
LT		 500}
501
4be44fcd 502static void acpi_cpufreq_remove_file(struct acpi_processor *pr)
1da177e4 503{
4be44fcd 504 struct acpi_device *device = NULL;
1da177e4 505
1da177e4
LT		 506
507 if (acpi_bus_get_device(pr->handle, &device))
d550d98d 508 return;
1da177e4
LT		 509
510 /* remove file 'performance' */
511 remove_proc_entry(ACPI_PROCESSOR_FILE_PERFORMANCE,
4be44fcd 512 acpi_device_dir(device));
1da177e4 513
d550d98d 514 return;
1da177e4
LT		 515}
516
517#else
4be44fcd
LB		 518static void acpi_cpufreq_add_file(struct acpi_processor *pr)
519{
520 return;
521}
522static void acpi_cpufreq_remove_file(struct acpi_processor *pr)
523{
524 return;
525}
526#endif /* CONFIG_X86_ACPI_CPUFREQ_PROC_INTF */
1da177e4 527
3b2d9942
VP		 528static int acpi_processor_get_psd(struct acpi_processor *pr)
529{
530 int result = 0;
531 acpi_status status = AE_OK;
532 struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL};
533 struct acpi_buffer format = {sizeof("NNNNN"), "NNNNN"};
534 struct acpi_buffer state = {0, NULL};
535 union acpi_object *psd = NULL;
536 struct acpi_psd_package *pdomain;
537
3b2d9942
VP		 538 status = acpi_evaluate_object(pr->handle, "_PSD", NULL, &buffer);
539 if (ACPI_FAILURE(status)) {
9011bff4 540 return -ENODEV;
3b2d9942
VP		 541 }
542
50dd0969 543 psd = buffer.pointer;
3b2d9942
VP		 544 if (!psd || (psd->type != ACPI_TYPE_PACKAGE)) {
545 ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid _PSD data\n"));
546 result = -EFAULT;
547 goto end;
548 }
549
550 if (psd->package.count != 1) {
551 ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid _PSD data\n"));
552 result = -EFAULT;
553 goto end;
554 }
555
556 pdomain = &(pr->performance->domain_info);
557
558 state.length = sizeof(struct acpi_psd_package);
559 state.pointer = pdomain;
560
561 status = acpi_extract_package(&(psd->package.elements[0]),
562 &format, &state);
563 if (ACPI_FAILURE(status)) {
564 ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Invalid _PSD data\n"));
565 result = -EFAULT;
566 goto end;
567 }
568
569 if (pdomain->num_entries != ACPI_PSD_REV0_ENTRIES) {
570 ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Unknown _PSD:num_entries\n"));
571 result = -EFAULT;
572 goto end;
573 }
574
575 if (pdomain->revision != ACPI_PSD_REV0_REVISION) {
576 ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Unknown _PSD:revision\n"));
577 result = -EFAULT;
578 goto end;
579 }
580
581end:
02438d87 582 kfree(buffer.pointer);
9011bff4 583 return result;
3b2d9942
VP		 584}
585
586int acpi_processor_preregister_performance(
587 struct acpi_processor_performance **performance)
588{
589 int count, count_target;
590 int retval = 0;
591 unsigned int i, j;
592 cpumask_t covered_cpus;
593 struct acpi_processor *pr;
594 struct acpi_psd_package *pdomain;
595 struct acpi_processor *match_pr;
596 struct acpi_psd_package *match_pdomain;
597
785fcccd 598 mutex_lock(&performance_mutex);
3b2d9942
VP		 599
600 retval = 0;
601
602 /* Call _PSD for all CPUs */
193de0c7 603 for_each_possible_cpu(i) {
3b2d9942
VP		 604 pr = processors[i];
605 if (!pr) {
606 /* Look only at processors in ACPI namespace */
607 continue;
608 }
609
610 if (pr->performance) {
611 retval = -EBUSY;
612 continue;
613 }
614
615 if (!performance || !performance[i]) {
616 retval = -EINVAL;
617 continue;
618 }
619
620 pr->performance = performance[i];
621 cpu_set(i, pr->performance->shared_cpu_map);
622 if (acpi_processor_get_psd(pr)) {
623 retval = -EINVAL;
624 continue;
625 }
626 }
627 if (retval)
628 goto err_ret;
629
630 /*
631 * Now that we have _PSD data from all CPUs, lets setup P-state
632 * domain info.
633 */
193de0c7 634 for_each_possible_cpu(i) {
3b2d9942
VP		 635 pr = processors[i];
636 if (!pr)
637 continue;
638
639 /* Basic validity check for domain info */
640 pdomain = &(pr->performance->domain_info);
641 if ((pdomain->revision != ACPI_PSD_REV0_REVISION) ||
642 (pdomain->num_entries != ACPI_PSD_REV0_ENTRIES)) {
643 retval = -EINVAL;
644 goto err_ret;
645 }
646 if (pdomain->coord_type != DOMAIN_COORD_TYPE_SW_ALL &&
647 pdomain->coord_type != DOMAIN_COORD_TYPE_SW_ANY &&
648 pdomain->coord_type != DOMAIN_COORD_TYPE_HW_ALL) {
649 retval = -EINVAL;
650 goto err_ret;
651 }
652 }
653
654 cpus_clear(covered_cpus);
193de0c7 655 for_each_possible_cpu(i) {
3b2d9942
VP		 656 pr = processors[i];
657 if (!pr)
658 continue;
659
660 if (cpu_isset(i, covered_cpus))
661 continue;
662
663 pdomain = &(pr->performance->domain_info);
664 cpu_set(i, pr->performance->shared_cpu_map);
665 cpu_set(i, covered_cpus);
666 if (pdomain->num_processors <= 1)
667 continue;
668
669 /* Validate the Domain info */
670 count_target = pdomain->num_processors;
671 count = 1;
46f18e3a 672 if (pdomain->coord_type == DOMAIN_COORD_TYPE_SW_ALL)
3b2d9942 673 pr->performance->shared_type = CPUFREQ_SHARED_TYPE_ALL;
46f18e3a
VP		 674 else if (pdomain->coord_type == DOMAIN_COORD_TYPE_HW_ALL)
675 pr->performance->shared_type = CPUFREQ_SHARED_TYPE_HW;
676 else if (pdomain->coord_type == DOMAIN_COORD_TYPE_SW_ANY)
3b2d9942 677 pr->performance->shared_type = CPUFREQ_SHARED_TYPE_ANY;
3b2d9942 678
193de0c7 679 for_each_possible_cpu(j) {
3b2d9942
VP		 680 if (i == j)
681 continue;
682
683 match_pr = processors[j];
684 if (!match_pr)
685 continue;
686
687 match_pdomain = &(match_pr->performance->domain_info);
688 if (match_pdomain->domain != pdomain->domain)
689 continue;
690
691 /* Here i and j are in the same domain */
692
693 if (match_pdomain->num_processors != count_target) {
694 retval = -EINVAL;
695 goto err_ret;
696 }
697
698 if (pdomain->coord_type != match_pdomain->coord_type) {
699 retval = -EINVAL;
700 goto err_ret;
701 }
702
703 cpu_set(j, covered_cpus);
704 cpu_set(j, pr->performance->shared_cpu_map);
705 count++;
706 }
707
193de0c7 708 for_each_possible_cpu(j) {
3b2d9942
VP		 709 if (i == j)
710 continue;
711
712 match_pr = processors[j];
713 if (!match_pr)
714 continue;
715
716 match_pdomain = &(match_pr->performance->domain_info);
717 if (match_pdomain->domain != pdomain->domain)
718 continue;
719
720 match_pr->performance->shared_type =
721 pr->performance->shared_type;
722 match_pr->performance->shared_cpu_map =
723 pr->performance->shared_cpu_map;
724 }
725 }
726
727err_ret:
193de0c7 728 for_each_possible_cpu(i) {
3b2d9942
VP		 729 pr = processors[i];
730 if (!pr || !pr->performance)
731 continue;
732
733 /* Assume no coordination on any error parsing domain info */
734 if (retval) {
735 cpus_clear(pr->performance->shared_cpu_map);
736 cpu_set(i, pr->performance->shared_cpu_map);
737 pr->performance->shared_type = CPUFREQ_SHARED_TYPE_ALL;
738 }
739 pr->performance = NULL; /* Will be set for real in register */
740 }
741
785fcccd 742 mutex_unlock(&performance_mutex);
9011bff4 743 return retval;
3b2d9942
VP		 744}
745EXPORT_SYMBOL(acpi_processor_preregister_performance);
746
747
1da177e4 748int
4be44fcd
LB		 749acpi_processor_register_performance(struct acpi_processor_performance
750 *performance, unsigned int cpu)
1da177e4
LT		 751{
752 struct acpi_processor *pr;
753
1da177e4
LT		 754
755 if (!(acpi_processor_ppc_status & PPC_REGISTERED))
d550d98d 756 return -EINVAL;
1da177e4 757
65c19bbd 758 mutex_lock(&performance_mutex);
1da177e4
LT		 759
760 pr = processors[cpu];
761 if (!pr) {
65c19bbd 762 mutex_unlock(&performance_mutex);
d550d98d 763 return -ENODEV;
1da177e4
LT		 764 }
765
766 if (pr->performance) {
65c19bbd 767 mutex_unlock(&performance_mutex);
d550d98d 768 return -EBUSY;
1da177e4
LT		 769 }
770
a913f507
AM		 771 WARN_ON(!performance);
772
1da177e4
LT		 773 pr->performance = performance;
774
775 if (acpi_processor_get_performance_info(pr)) {
776 pr->performance = NULL;
65c19bbd 777 mutex_unlock(&performance_mutex);
d550d98d 778 return -EIO;
1da177e4
LT		 779 }
780
781 acpi_cpufreq_add_file(pr);
782
65c19bbd 783 mutex_unlock(&performance_mutex);
d550d98d 784 return 0;
1da177e4 785}
1da177e4 786
4be44fcd 787EXPORT_SYMBOL(acpi_processor_register_performance);
1da177e4
LT		 788
789void
4be44fcd
LB		 790acpi_processor_unregister_performance(struct acpi_processor_performance
791 *performance, unsigned int cpu)
1da177e4
LT		 792{
793 struct acpi_processor *pr;
794
1da177e4 795
65c19bbd 796 mutex_lock(&performance_mutex);
1da177e4
LT		 797
798 pr = processors[cpu];
799 if (!pr) {
65c19bbd 800 mutex_unlock(&performance_mutex);
d550d98d 801 return;
1da177e4
LT		 802 }
803
a913f507
AM		 804 if (pr->performance)
805 kfree(pr->performance->states);
1da177e4
LT		 806 pr->performance = NULL;
807
808 acpi_cpufreq_remove_file(pr);
809
65c19bbd 810 mutex_unlock(&performance_mutex);
1da177e4 811
d550d98d 812 return;
1da177e4 813}
4be44fcd 814
1da177e4 815EXPORT_SYMBOL(acpi_processor_unregister_performance);
kernel source for telekom puls (alcatel/mediatek)