cpumask: convert shared_cpu_map in acpi_processor* structs to cpumask_var_t
[linux-2.6.git] / drivers / acpi / processor_perflib.c
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_ACPI_CPUFREQ_PROC_INTF
35 #include <linux/proc_fs.h>
36 #include <linux/seq_file.h>
37 #include <linux/mutex.h>
38
39 #include <asm/uaccess.h>
40 #endif
41
42 #ifdef CONFIG_X86
43 #include <asm/cpufeature.h>
44 #endif
45
46 #include <acpi/acpi_bus.h>
47 #include <acpi/acpi_drivers.h>
48 #include <acpi/processor.h>
49
50 #define ACPI_PROCESSOR_CLASS            "processor"
51 #define ACPI_PROCESSOR_FILE_PERFORMANCE "performance"
52 #define _COMPONENT              ACPI_PROCESSOR_COMPONENT
53 ACPI_MODULE_NAME("processor_perflib");
54
55 static DEFINE_MUTEX(performance_mutex);
56
57 /* Use cpufreq debug layer for _PPC changes. */
58 #define cpufreq_printk(msg...) cpufreq_debug_printk(CPUFREQ_DEBUG_CORE, \
59                                                 "cpufreq-core", msg)
60
61 /*
62  * _PPC support is implemented as a CPUfreq policy notifier:
63  * This means each time a CPUfreq driver registered also with
64  * the ACPI core is asked to change the speed policy, the maximum
65  * value is adjusted so that it is within the platform limit.
66  *
67  * Also, when a new platform limit value is detected, the CPUfreq
68  * policy is adjusted accordingly.
69  */
70
71 /* ignore_ppc:
72  * -1 -> cpufreq low level drivers not initialized -> _PSS, etc. not called yet
73  *       ignore _PPC
74  *  0 -> cpufreq low level drivers initialized -> consider _PPC values
75  *  1 -> ignore _PPC totally -> forced by user through boot param
76  */
77 static int ignore_ppc = -1;
78 module_param(ignore_ppc, int, 0644);
79 MODULE_PARM_DESC(ignore_ppc, "If the frequency of your machine gets wrongly" \
80                  "limited by BIOS, this should help");
81
82 #define PPC_REGISTERED   1
83 #define PPC_IN_USE       2
84
85 static int acpi_processor_ppc_status;
86
87 static int acpi_processor_ppc_notifier(struct notifier_block *nb,
88                                        unsigned long event, void *data)
89 {
90         struct cpufreq_policy *policy = data;
91         struct acpi_processor *pr;
92         unsigned int ppc = 0;
93
94         if (event == CPUFREQ_START && ignore_ppc <= 0) {
95                 ignore_ppc = 0;
96                 return 0;
97         }
98
99         if (ignore_ppc)
100                 return 0;
101
102         if (event != CPUFREQ_INCOMPATIBLE)
103                 return 0;
104
105         mutex_lock(&performance_mutex);
106
107         pr = per_cpu(processors, policy->cpu);
108         if (!pr || !pr->performance)
109                 goto out;
110
111         ppc = (unsigned int)pr->performance_platform_limit;
112
113         if (ppc >= pr->performance->state_count)
114                 goto out;
115
116         cpufreq_verify_within_limits(policy, 0,
117                                      pr->performance->states[ppc].
118                                      core_frequency * 1000);
119
120       out:
121         mutex_unlock(&performance_mutex);
122
123         return 0;
124 }
125
126 static struct notifier_block acpi_ppc_notifier_block = {
127         .notifier_call = acpi_processor_ppc_notifier,
128 };
129
130 static int acpi_processor_get_platform_limit(struct acpi_processor *pr)
131 {
132         acpi_status status = 0;
133         unsigned long long ppc = 0;
134
135
136         if (!pr)
137                 return -EINVAL;
138
139         /*
140          * _PPC indicates the maximum state currently supported by the platform
141          * (e.g. 0 = states 0..n; 1 = states 1..n; etc.
142          */
143         status = acpi_evaluate_integer(pr->handle, "_PPC", NULL, &ppc);
144
145         if (status != AE_NOT_FOUND)
146                 acpi_processor_ppc_status |= PPC_IN_USE;
147
148         if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
149                 ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PPC"));
150                 return -ENODEV;
151         }
152
153         cpufreq_printk("CPU %d: _PPC is %d - frequency %s limited\n", pr->id,
154                        (int)ppc, ppc ? "" : "not");
155
156         pr->performance_platform_limit = (int)ppc;
157
158         return 0;
159 }
160
161 int acpi_processor_ppc_has_changed(struct acpi_processor *pr)
162 {
163         int ret;
164
165         if (ignore_ppc)
166                 return 0;
167
168         ret = acpi_processor_get_platform_limit(pr);
169
170         if (ret < 0)
171                 return (ret);
172         else
173                 return cpufreq_update_policy(pr->id);
174 }
175
176 void acpi_processor_ppc_init(void)
177 {
178         if (!cpufreq_register_notifier
179             (&acpi_ppc_notifier_block, CPUFREQ_POLICY_NOTIFIER))
180                 acpi_processor_ppc_status |= PPC_REGISTERED;
181         else
182                 printk(KERN_DEBUG
183                        "Warning: Processor Platform Limit not supported.\n");
184 }
185
186 void acpi_processor_ppc_exit(void)
187 {
188         if (acpi_processor_ppc_status & PPC_REGISTERED)
189                 cpufreq_unregister_notifier(&acpi_ppc_notifier_block,
190                                             CPUFREQ_POLICY_NOTIFIER);
191
192         acpi_processor_ppc_status &= ~PPC_REGISTERED;
193 }
194
195 static int acpi_processor_get_performance_control(struct acpi_processor *pr)
196 {
197         int result = 0;
198         acpi_status status = 0;
199         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
200         union acpi_object *pct = NULL;
201         union acpi_object obj = { 0 };
202
203
204         status = acpi_evaluate_object(pr->handle, "_PCT", NULL, &buffer);
205         if (ACPI_FAILURE(status)) {
206                 ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PCT"));
207                 return -ENODEV;
208         }
209
210         pct = (union acpi_object *)buffer.pointer;
211         if (!pct || (pct->type != ACPI_TYPE_PACKAGE)
212             || (pct->package.count != 2)) {
213                 printk(KERN_ERR PREFIX "Invalid _PCT data\n");
214                 result = -EFAULT;
215                 goto end;
216         }
217
218         /*
219          * control_register
220          */
221
222         obj = pct->package.elements[0];
223
224         if ((obj.type != ACPI_TYPE_BUFFER)
225             || (obj.buffer.length < sizeof(struct acpi_pct_register))
226             || (obj.buffer.pointer == NULL)) {
227                 printk(KERN_ERR PREFIX "Invalid _PCT data (control_register)\n");
228                 result = -EFAULT;
229                 goto end;
230         }
231         memcpy(&pr->performance->control_register, obj.buffer.pointer,
232                sizeof(struct acpi_pct_register));
233
234         /*
235          * status_register
236          */
237
238         obj = pct->package.elements[1];
239
240         if ((obj.type != ACPI_TYPE_BUFFER)
241             || (obj.buffer.length < sizeof(struct acpi_pct_register))
242             || (obj.buffer.pointer == NULL)) {
243                 printk(KERN_ERR PREFIX "Invalid _PCT data (status_register)\n");
244                 result = -EFAULT;
245                 goto end;
246         }
247
248         memcpy(&pr->performance->status_register, obj.buffer.pointer,
249                sizeof(struct acpi_pct_register));
250
251       end:
252         kfree(buffer.pointer);
253
254         return result;
255 }
256
257 static int acpi_processor_get_performance_states(struct acpi_processor *pr)
258 {
259         int result = 0;
260         acpi_status status = AE_OK;
261         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
262         struct acpi_buffer format = { sizeof("NNNNNN"), "NNNNNN" };
263         struct acpi_buffer state = { 0, NULL };
264         union acpi_object *pss = NULL;
265         int i;
266
267
268         status = acpi_evaluate_object(pr->handle, "_PSS", NULL, &buffer);
269         if (ACPI_FAILURE(status)) {
270                 ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PSS"));
271                 return -ENODEV;
272         }
273
274         pss = buffer.pointer;
275         if (!pss || (pss->type != ACPI_TYPE_PACKAGE)) {
276                 printk(KERN_ERR PREFIX "Invalid _PSS data\n");
277                 result = -EFAULT;
278                 goto end;
279         }
280
281         ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found %d performance states\n",
282                           pss->package.count));
283
284         pr->performance->state_count = pss->package.count;
285         pr->performance->states =
286             kmalloc(sizeof(struct acpi_processor_px) * pss->package.count,
287                     GFP_KERNEL);
288         if (!pr->performance->states) {
289                 result = -ENOMEM;
290                 goto end;
291         }
292
293         for (i = 0; i < pr->performance->state_count; i++) {
294
295                 struct acpi_processor_px *px = &(pr->performance->states[i]);
296
297                 state.length = sizeof(struct acpi_processor_px);
298                 state.pointer = px;
299
300                 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Extracting state %d\n", i));
301
302                 status = acpi_extract_package(&(pss->package.elements[i]),
303                                               &format, &state);
304                 if (ACPI_FAILURE(status)) {
305                         ACPI_EXCEPTION((AE_INFO, status, "Invalid _PSS data"));
306                         result = -EFAULT;
307                         kfree(pr->performance->states);
308                         goto end;
309                 }
310
311                 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
312                                   "State [%d]: core_frequency[%d] power[%d] transition_latency[%d] bus_master_latency[%d] control[0x%x] status[0x%x]\n",
313                                   i,
314                                   (u32) px->core_frequency,
315                                   (u32) px->power,
316                                   (u32) px->transition_latency,
317                                   (u32) px->bus_master_latency,
318                                   (u32) px->control, (u32) px->status));
319
320                 if (!px->core_frequency) {
321                         printk(KERN_ERR PREFIX
322                                     "Invalid _PSS data: freq is zero\n");
323                         result = -EFAULT;
324                         kfree(pr->performance->states);
325                         goto end;
326                 }
327         }
328
329       end:
330         kfree(buffer.pointer);
331
332         return result;
333 }
334
335 static int acpi_processor_get_performance_info(struct acpi_processor *pr)
336 {
337         int result = 0;
338         acpi_status status = AE_OK;
339         acpi_handle handle = NULL;
340
341         if (!pr || !pr->performance || !pr->handle)
342                 return -EINVAL;
343
344         status = acpi_get_handle(pr->handle, "_PCT", &handle);
345         if (ACPI_FAILURE(status)) {
346                 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
347                                   "ACPI-based processor performance control unavailable\n"));
348                 return -ENODEV;
349         }
350
351         result = acpi_processor_get_performance_control(pr);
352         if (result)
353                 goto update_bios;
354
355         result = acpi_processor_get_performance_states(pr);
356         if (result)
357                 goto update_bios;
358
359         return 0;
360
361         /*
362          * Having _PPC but missing frequencies (_PSS, _PCT) is a very good hint that
363          * the BIOS is older than the CPU and does not know its frequencies
364          */
365  update_bios:
366 #ifdef CONFIG_X86
367         if (ACPI_SUCCESS(acpi_get_handle(pr->handle, "_PPC", &handle))){
368                 if(boot_cpu_has(X86_FEATURE_EST))
369                         printk(KERN_WARNING FW_BUG "BIOS needs update for CPU "
370                                "frequency support\n");
371         }
372 #endif
373         return result;
374 }
375
376 int acpi_processor_notify_smm(struct module *calling_module)
377 {
378         acpi_status status;
379         static int is_done = 0;
380
381
382         if (!(acpi_processor_ppc_status & PPC_REGISTERED))
383                 return -EBUSY;
384
385         if (!try_module_get(calling_module))
386                 return -EINVAL;
387
388         /* is_done is set to negative if an error occured,
389          * and to postitive if _no_ error occured, but SMM
390          * was already notified. This avoids double notification
391          * which might lead to unexpected results...
392          */
393         if (is_done > 0) {
394                 module_put(calling_module);
395                 return 0;
396         } else if (is_done < 0) {
397                 module_put(calling_module);
398                 return is_done;
399         }
400
401         is_done = -EIO;
402
403         /* Can't write pstate_control to smi_command if either value is zero */
404         if ((!acpi_gbl_FADT.smi_command) || (!acpi_gbl_FADT.pstate_control)) {
405                 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No SMI port or pstate_control\n"));
406                 module_put(calling_module);
407                 return 0;
408         }
409
410         ACPI_DEBUG_PRINT((ACPI_DB_INFO,
411                           "Writing pstate_control [0x%x] to smi_command [0x%x]\n",
412                           acpi_gbl_FADT.pstate_control, acpi_gbl_FADT.smi_command));
413
414         status = acpi_os_write_port(acpi_gbl_FADT.smi_command,
415                                     (u32) acpi_gbl_FADT.pstate_control, 8);
416         if (ACPI_FAILURE(status)) {
417                 ACPI_EXCEPTION((AE_INFO, status,
418                                 "Failed to write pstate_control [0x%x] to "
419                                 "smi_command [0x%x]", acpi_gbl_FADT.pstate_control,
420                                 acpi_gbl_FADT.smi_command));
421                 module_put(calling_module);
422                 return status;
423         }
424
425         /* Success. If there's no _PPC, we need to fear nothing, so
426          * we can allow the cpufreq driver to be rmmod'ed. */
427         is_done = 1;
428
429         if (!(acpi_processor_ppc_status & PPC_IN_USE))
430                 module_put(calling_module);
431
432         return 0;
433 }
434
435 EXPORT_SYMBOL(acpi_processor_notify_smm);
436
437 #ifdef CONFIG_X86_ACPI_CPUFREQ_PROC_INTF
438 /* /proc/acpi/processor/../performance interface (DEPRECATED) */
439
440 static int acpi_processor_perf_open_fs(struct inode *inode, struct file *file);
441 static struct file_operations acpi_processor_perf_fops = {
442         .owner = THIS_MODULE,
443         .open = acpi_processor_perf_open_fs,
444         .read = seq_read,
445         .llseek = seq_lseek,
446         .release = single_release,
447 };
448
449 static int acpi_processor_perf_seq_show(struct seq_file *seq, void *offset)
450 {
451         struct acpi_processor *pr = seq->private;
452         int i;
453
454
455         if (!pr)
456                 goto end;
457
458         if (!pr->performance) {
459                 seq_puts(seq, "<not supported>\n");
460                 goto end;
461         }
462
463         seq_printf(seq, "state count:             %d\n"
464                    "active state:            P%d\n",
465                    pr->performance->state_count, pr->performance->state);
466
467         seq_puts(seq, "states:\n");
468         for (i = 0; i < pr->performance->state_count; i++)
469                 seq_printf(seq,
470                            "   %cP%d:                  %d MHz, %d mW, %d uS\n",
471                            (i == pr->performance->state ? '*' : ' '), i,
472                            (u32) pr->performance->states[i].core_frequency,
473                            (u32) pr->performance->states[i].power,
474                            (u32) pr->performance->states[i].transition_latency);
475
476       end:
477         return 0;
478 }
479
480 static int acpi_processor_perf_open_fs(struct inode *inode, struct file *file)
481 {
482         return single_open(file, acpi_processor_perf_seq_show,
483                            PDE(inode)->data);
484 }
485
486 static void acpi_cpufreq_add_file(struct acpi_processor *pr)
487 {
488         struct acpi_device *device = NULL;
489
490
491         if (acpi_bus_get_device(pr->handle, &device))
492                 return;
493
494         /* add file 'performance' [R/W] */
495         proc_create_data(ACPI_PROCESSOR_FILE_PERFORMANCE, S_IFREG | S_IRUGO,
496                          acpi_device_dir(device),
497                          &acpi_processor_perf_fops, acpi_driver_data(device));
498         return;
499 }
500
501 static void acpi_cpufreq_remove_file(struct acpi_processor *pr)
502 {
503         struct acpi_device *device = NULL;
504
505
506         if (acpi_bus_get_device(pr->handle, &device))
507                 return;
508
509         /* remove file 'performance' */
510         remove_proc_entry(ACPI_PROCESSOR_FILE_PERFORMANCE,
511                           acpi_device_dir(device));
512
513         return;
514 }
515
516 #else
517 static void acpi_cpufreq_add_file(struct acpi_processor *pr)
518 {
519         return;
520 }
521 static void acpi_cpufreq_remove_file(struct acpi_processor *pr)
522 {
523         return;
524 }
525 #endif                          /* CONFIG_X86_ACPI_CPUFREQ_PROC_INTF */
526
527 static int acpi_processor_get_psd(struct acpi_processor *pr)
528 {
529         int result = 0;
530         acpi_status status = AE_OK;
531         struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL};
532         struct acpi_buffer format = {sizeof("NNNNN"), "NNNNN"};
533         struct acpi_buffer state = {0, NULL};
534         union acpi_object  *psd = NULL;
535         struct acpi_psd_package *pdomain;
536
537         status = acpi_evaluate_object(pr->handle, "_PSD", NULL, &buffer);
538         if (ACPI_FAILURE(status)) {
539                 return -ENODEV;
540         }
541
542         psd = buffer.pointer;
543         if (!psd || (psd->type != ACPI_TYPE_PACKAGE)) {
544                 printk(KERN_ERR PREFIX "Invalid _PSD data\n");
545                 result = -EFAULT;
546                 goto end;
547         }
548
549         if (psd->package.count != 1) {
550                 printk(KERN_ERR PREFIX "Invalid _PSD data\n");
551                 result = -EFAULT;
552                 goto end;
553         }
554
555         pdomain = &(pr->performance->domain_info);
556
557         state.length = sizeof(struct acpi_psd_package);
558         state.pointer = pdomain;
559
560         status = acpi_extract_package(&(psd->package.elements[0]),
561                 &format, &state);
562         if (ACPI_FAILURE(status)) {
563                 printk(KERN_ERR PREFIX "Invalid _PSD data\n");
564                 result = -EFAULT;
565                 goto end;
566         }
567
568         if (pdomain->num_entries != ACPI_PSD_REV0_ENTRIES) {
569                 printk(KERN_ERR PREFIX "Unknown _PSD:num_entries\n");
570                 result = -EFAULT;
571                 goto end;
572         }
573
574         if (pdomain->revision != ACPI_PSD_REV0_REVISION) {
575                 printk(KERN_ERR PREFIX "Unknown _PSD:revision\n");
576                 result = -EFAULT;
577                 goto end;
578         }
579
580 end:
581         kfree(buffer.pointer);
582         return result;
583 }
584
585 int acpi_processor_preregister_performance(
586                 struct acpi_processor_performance *performance)
587 {
588         int count, count_target;
589         int retval = 0;
590         unsigned int i, j;
591         cpumask_var_t covered_cpus;
592         struct acpi_processor *pr;
593         struct acpi_psd_package *pdomain;
594         struct acpi_processor *match_pr;
595         struct acpi_psd_package *match_pdomain;
596
597         if (!alloc_cpumask_var(&covered_cpus, GFP_KERNEL))
598                 return -ENOMEM;
599
600         mutex_lock(&performance_mutex);
601
602         retval = 0;
603
604         /* Call _PSD for all CPUs */
605         for_each_possible_cpu(i) {
606                 pr = per_cpu(processors, i);
607                 if (!pr) {
608                         /* Look only at processors in ACPI namespace */
609                         continue;
610                 }
611
612                 if (pr->performance) {
613                         retval = -EBUSY;
614                         continue;
615                 }
616
617                 if (!performance || !percpu_ptr(performance, i)) {
618                         retval = -EINVAL;
619                         continue;
620                 }
621
622                 pr->performance = percpu_ptr(performance, i);
623                 cpumask_set_cpu(i, pr->performance->shared_cpu_map);
624                 if (acpi_processor_get_psd(pr)) {
625                         retval = -EINVAL;
626                         continue;
627                 }
628         }
629         if (retval)
630                 goto err_ret;
631
632         /*
633          * Now that we have _PSD data from all CPUs, lets setup P-state 
634          * domain info.
635          */
636         for_each_possible_cpu(i) {
637                 pr = per_cpu(processors, i);
638                 if (!pr)
639                         continue;
640
641                 /* Basic validity check for domain info */
642                 pdomain = &(pr->performance->domain_info);
643                 if ((pdomain->revision != ACPI_PSD_REV0_REVISION) ||
644                     (pdomain->num_entries != ACPI_PSD_REV0_ENTRIES)) {
645                         retval = -EINVAL;
646                         goto err_ret;
647                 }
648                 if (pdomain->coord_type != DOMAIN_COORD_TYPE_SW_ALL &&
649                     pdomain->coord_type != DOMAIN_COORD_TYPE_SW_ANY &&
650                     pdomain->coord_type != DOMAIN_COORD_TYPE_HW_ALL) {
651                         retval = -EINVAL;
652                         goto err_ret;
653                 }
654         }
655
656         cpumask_clear(covered_cpus);
657         for_each_possible_cpu(i) {
658                 pr = per_cpu(processors, i);
659                 if (!pr)
660                         continue;
661
662                 if (cpumask_test_cpu(i, covered_cpus))
663                         continue;
664
665                 pdomain = &(pr->performance->domain_info);
666                 cpumask_set_cpu(i, pr->performance->shared_cpu_map);
667                 cpumask_set_cpu(i, covered_cpus);
668                 if (pdomain->num_processors <= 1)
669                         continue;
670
671                 /* Validate the Domain info */
672                 count_target = pdomain->num_processors;
673                 count = 1;
674                 if (pdomain->coord_type == DOMAIN_COORD_TYPE_SW_ALL)
675                         pr->performance->shared_type = CPUFREQ_SHARED_TYPE_ALL;
676                 else if (pdomain->coord_type == DOMAIN_COORD_TYPE_HW_ALL)
677                         pr->performance->shared_type = CPUFREQ_SHARED_TYPE_HW;
678                 else if (pdomain->coord_type == DOMAIN_COORD_TYPE_SW_ANY)
679                         pr->performance->shared_type = CPUFREQ_SHARED_TYPE_ANY;
680
681                 for_each_possible_cpu(j) {
682                         if (i == j)
683                                 continue;
684
685                         match_pr = per_cpu(processors, j);
686                         if (!match_pr)
687                                 continue;
688
689                         match_pdomain = &(match_pr->performance->domain_info);
690                         if (match_pdomain->domain != pdomain->domain)
691                                 continue;
692
693                         /* Here i and j are in the same domain */
694
695                         if (match_pdomain->num_processors != count_target) {
696                                 retval = -EINVAL;
697                                 goto err_ret;
698                         }
699
700                         if (pdomain->coord_type != match_pdomain->coord_type) {
701                                 retval = -EINVAL;
702                                 goto err_ret;
703                         }
704
705                         cpumask_set_cpu(j, covered_cpus);
706                         cpumask_set_cpu(j, pr->performance->shared_cpu_map);
707                         count++;
708                 }
709
710                 for_each_possible_cpu(j) {
711                         if (i == j)
712                                 continue;
713
714                         match_pr = per_cpu(processors, j);
715                         if (!match_pr)
716                                 continue;
717
718                         match_pdomain = &(match_pr->performance->domain_info);
719                         if (match_pdomain->domain != pdomain->domain)
720                                 continue;
721
722                         match_pr->performance->shared_type = 
723                                         pr->performance->shared_type;
724                         cpumask_copy(match_pr->performance->shared_cpu_map,
725                                      pr->performance->shared_cpu_map);
726                 }
727         }
728
729 err_ret:
730         for_each_possible_cpu(i) {
731                 pr = per_cpu(processors, i);
732                 if (!pr || !pr->performance)
733                         continue;
734
735                 /* Assume no coordination on any error parsing domain info */
736                 if (retval) {
737                         cpumask_clear(pr->performance->shared_cpu_map);
738                         cpumask_set_cpu(i, pr->performance->shared_cpu_map);
739                         pr->performance->shared_type = CPUFREQ_SHARED_TYPE_ALL;
740                 }
741                 pr->performance = NULL; /* Will be set for real in register */
742         }
743
744         mutex_unlock(&performance_mutex);
745         free_cpumask_var(covered_cpus);
746         return retval;
747 }
748 EXPORT_SYMBOL(acpi_processor_preregister_performance);
749
750
751 int
752 acpi_processor_register_performance(struct acpi_processor_performance
753                                     *performance, unsigned int cpu)
754 {
755         struct acpi_processor *pr;
756
757
758         if (!(acpi_processor_ppc_status & PPC_REGISTERED))
759                 return -EINVAL;
760
761         mutex_lock(&performance_mutex);
762
763         pr = per_cpu(processors, cpu);
764         if (!pr) {
765                 mutex_unlock(&performance_mutex);
766                 return -ENODEV;
767         }
768
769         if (pr->performance) {
770                 mutex_unlock(&performance_mutex);
771                 return -EBUSY;
772         }
773
774         WARN_ON(!performance);
775
776         pr->performance = performance;
777
778         if (acpi_processor_get_performance_info(pr)) {
779                 pr->performance = NULL;
780                 mutex_unlock(&performance_mutex);
781                 return -EIO;
782         }
783
784         acpi_cpufreq_add_file(pr);
785
786         mutex_unlock(&performance_mutex);
787         return 0;
788 }
789
790 EXPORT_SYMBOL(acpi_processor_register_performance);
791
792 void
793 acpi_processor_unregister_performance(struct acpi_processor_performance
794                                       *performance, unsigned int cpu)
795 {
796         struct acpi_processor *pr;
797
798
799         mutex_lock(&performance_mutex);
800
801         pr = per_cpu(processors, cpu);
802         if (!pr) {
803                 mutex_unlock(&performance_mutex);
804                 return;
805         }
806
807         if (pr->performance)
808                 kfree(pr->performance->states);
809         pr->performance = NULL;
810
811         acpi_cpufreq_remove_file(pr);
812
813         mutex_unlock(&performance_mutex);
814
815         return;
816 }
817
818 EXPORT_SYMBOL(acpi_processor_unregister_performance);