Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * acpi_processor.c - ACPI Processor Driver ($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 | * This program is free software; you can redistribute it and/or modify | |
13 | * it under the terms of the GNU General Public License as published by | |
14 | * the Free Software Foundation; either version 2 of the License, or (at | |
15 | * your option) any later version. | |
16 | * | |
17 | * This program is distributed in the hope that it will be useful, but | |
18 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
20 | * General Public License for more details. | |
21 | * | |
22 | * You should have received a copy of the GNU General Public License along | |
23 | * with this program; if not, write to the Free Software Foundation, Inc., | |
24 | * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. | |
25 | * | |
26 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
27 | * TBD: | |
28 | * 1. Make # power states dynamic. | |
29 | * 2. Support duty_cycle values that span bit 4. | |
30 | * 3. Optimize by having scheduler determine business instead of | |
31 | * having us try to calculate it here. | |
32 | * 4. Need C1 timing -- must modify kernel (IRQ handler) to get this. | |
33 | */ | |
34 | ||
35 | #include <linux/kernel.h> | |
36 | #include <linux/module.h> | |
37 | #include <linux/init.h> | |
38 | #include <linux/types.h> | |
39 | #include <linux/pci.h> | |
40 | #include <linux/pm.h> | |
41 | #include <linux/cpufreq.h> | |
42 | #include <linux/cpu.h> | |
43 | #include <linux/proc_fs.h> | |
44 | #include <linux/seq_file.h> | |
45 | #include <linux/dmi.h> | |
46 | #include <linux/moduleparam.h> | |
4f86d3a8 | 47 | #include <linux/cpuidle.h> |
1da177e4 LT |
48 | |
49 | #include <asm/io.h> | |
50 | #include <asm/system.h> | |
51 | #include <asm/cpu.h> | |
52 | #include <asm/delay.h> | |
53 | #include <asm/uaccess.h> | |
54 | #include <asm/processor.h> | |
55 | #include <asm/smp.h> | |
56 | #include <asm/acpi.h> | |
57 | ||
58 | #include <acpi/acpi_bus.h> | |
59 | #include <acpi/acpi_drivers.h> | |
60 | #include <acpi/processor.h> | |
61 | ||
1da177e4 LT |
62 | #define ACPI_PROCESSOR_COMPONENT 0x01000000 |
63 | #define ACPI_PROCESSOR_CLASS "processor" | |
1da177e4 LT |
64 | #define ACPI_PROCESSOR_DEVICE_NAME "Processor" |
65 | #define ACPI_PROCESSOR_FILE_INFO "info" | |
66 | #define ACPI_PROCESSOR_FILE_THROTTLING "throttling" | |
67 | #define ACPI_PROCESSOR_FILE_LIMIT "limit" | |
68 | #define ACPI_PROCESSOR_NOTIFY_PERFORMANCE 0x80 | |
69 | #define ACPI_PROCESSOR_NOTIFY_POWER 0x81 | |
01854e69 | 70 | #define ACPI_PROCESSOR_NOTIFY_THROTTLING 0x82 |
1da177e4 LT |
71 | |
72 | #define ACPI_PROCESSOR_LIMIT_USER 0 | |
73 | #define ACPI_PROCESSOR_LIMIT_THERMAL 1 | |
74 | ||
1da177e4 | 75 | #define _COMPONENT ACPI_PROCESSOR_COMPONENT |
f52fd66d | 76 | ACPI_MODULE_NAME("processor_core"); |
1da177e4 | 77 | |
f52fd66d | 78 | MODULE_AUTHOR("Paul Diefenbaugh"); |
7cda93e0 | 79 | MODULE_DESCRIPTION("ACPI Processor Driver"); |
1da177e4 LT |
80 | MODULE_LICENSE("GPL"); |
81 | ||
4be44fcd LB |
82 | static int acpi_processor_add(struct acpi_device *device); |
83 | static int acpi_processor_start(struct acpi_device *device); | |
84 | static int acpi_processor_remove(struct acpi_device *device, int type); | |
1da177e4 | 85 | static int acpi_processor_info_open_fs(struct inode *inode, struct file *file); |
4be44fcd | 86 | static void acpi_processor_notify(acpi_handle handle, u32 event, void *data); |
1da177e4 LT |
87 | static acpi_status acpi_processor_hotadd_init(acpi_handle handle, int *p_cpu); |
88 | static int acpi_processor_handle_eject(struct acpi_processor *pr); | |
01854e69 LY |
89 | extern int acpi_processor_tstate_has_changed(struct acpi_processor *pr); |
90 | ||
1da177e4 | 91 | |
1ba90e3a TR |
92 | static const struct acpi_device_id processor_device_ids[] = { |
93 | {ACPI_PROCESSOR_HID, 0}, | |
94 | {"", 0}, | |
95 | }; | |
96 | MODULE_DEVICE_TABLE(acpi, processor_device_ids); | |
97 | ||
1da177e4 | 98 | static struct acpi_driver acpi_processor_driver = { |
c2b6705b | 99 | .name = "processor", |
4be44fcd | 100 | .class = ACPI_PROCESSOR_CLASS, |
1ba90e3a | 101 | .ids = processor_device_ids, |
4be44fcd LB |
102 | .ops = { |
103 | .add = acpi_processor_add, | |
104 | .remove = acpi_processor_remove, | |
105 | .start = acpi_processor_start, | |
b04e7bdb TG |
106 | .suspend = acpi_processor_suspend, |
107 | .resume = acpi_processor_resume, | |
4be44fcd | 108 | }, |
1da177e4 LT |
109 | }; |
110 | ||
111 | #define INSTALL_NOTIFY_HANDLER 1 | |
112 | #define UNINSTALL_NOTIFY_HANDLER 2 | |
113 | ||
d7508032 | 114 | static const struct file_operations acpi_processor_info_fops = { |
4be44fcd LB |
115 | .open = acpi_processor_info_open_fs, |
116 | .read = seq_read, | |
117 | .llseek = seq_lseek, | |
118 | .release = single_release, | |
1da177e4 LT |
119 | }; |
120 | ||
4be44fcd | 121 | struct acpi_processor *processors[NR_CPUS]; |
9f222718 | 122 | struct acpi_processor_errata errata __read_mostly; |
1da177e4 | 123 | |
1da177e4 LT |
124 | /* -------------------------------------------------------------------------- |
125 | Errata Handling | |
126 | -------------------------------------------------------------------------- */ | |
127 | ||
4be44fcd | 128 | static int acpi_processor_errata_piix4(struct pci_dev *dev) |
1da177e4 | 129 | { |
4be44fcd LB |
130 | u8 value1 = 0; |
131 | u8 value2 = 0; | |
1da177e4 | 132 | |
1da177e4 LT |
133 | |
134 | if (!dev) | |
d550d98d | 135 | return -EINVAL; |
1da177e4 LT |
136 | |
137 | /* | |
138 | * Note that 'dev' references the PIIX4 ACPI Controller. | |
139 | */ | |
140 | ||
44c10138 | 141 | switch (dev->revision) { |
1da177e4 LT |
142 | case 0: |
143 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found PIIX4 A-step\n")); | |
144 | break; | |
145 | case 1: | |
146 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found PIIX4 B-step\n")); | |
147 | break; | |
148 | case 2: | |
149 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found PIIX4E\n")); | |
150 | break; | |
151 | case 3: | |
152 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found PIIX4M\n")); | |
153 | break; | |
154 | default: | |
155 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found unknown PIIX4\n")); | |
156 | break; | |
157 | } | |
158 | ||
44c10138 | 159 | switch (dev->revision) { |
1da177e4 LT |
160 | |
161 | case 0: /* PIIX4 A-step */ | |
162 | case 1: /* PIIX4 B-step */ | |
163 | /* | |
164 | * See specification changes #13 ("Manual Throttle Duty Cycle") | |
165 | * and #14 ("Enabling and Disabling Manual Throttle"), plus | |
166 | * erratum #5 ("STPCLK# Deassertion Time") from the January | |
167 | * 2002 PIIX4 specification update. Applies to only older | |
168 | * PIIX4 models. | |
169 | */ | |
170 | errata.piix4.throttle = 1; | |
171 | ||
172 | case 2: /* PIIX4E */ | |
173 | case 3: /* PIIX4M */ | |
174 | /* | |
175 | * See erratum #18 ("C3 Power State/BMIDE and Type-F DMA | |
176 | * Livelock") from the January 2002 PIIX4 specification update. | |
177 | * Applies to all PIIX4 models. | |
178 | */ | |
179 | ||
180 | /* | |
181 | * BM-IDE | |
182 | * ------ | |
183 | * Find the PIIX4 IDE Controller and get the Bus Master IDE | |
184 | * Status register address. We'll use this later to read | |
185 | * each IDE controller's DMA status to make sure we catch all | |
186 | * DMA activity. | |
187 | */ | |
188 | dev = pci_get_subsys(PCI_VENDOR_ID_INTEL, | |
4be44fcd LB |
189 | PCI_DEVICE_ID_INTEL_82371AB, |
190 | PCI_ANY_ID, PCI_ANY_ID, NULL); | |
1da177e4 LT |
191 | if (dev) { |
192 | errata.piix4.bmisx = pci_resource_start(dev, 4); | |
193 | pci_dev_put(dev); | |
194 | } | |
195 | ||
196 | /* | |
197 | * Type-F DMA | |
198 | * ---------- | |
199 | * Find the PIIX4 ISA Controller and read the Motherboard | |
200 | * DMA controller's status to see if Type-F (Fast) DMA mode | |
201 | * is enabled (bit 7) on either channel. Note that we'll | |
202 | * disable C3 support if this is enabled, as some legacy | |
203 | * devices won't operate well if fast DMA is disabled. | |
204 | */ | |
205 | dev = pci_get_subsys(PCI_VENDOR_ID_INTEL, | |
4be44fcd LB |
206 | PCI_DEVICE_ID_INTEL_82371AB_0, |
207 | PCI_ANY_ID, PCI_ANY_ID, NULL); | |
1da177e4 LT |
208 | if (dev) { |
209 | pci_read_config_byte(dev, 0x76, &value1); | |
210 | pci_read_config_byte(dev, 0x77, &value2); | |
211 | if ((value1 & 0x80) || (value2 & 0x80)) | |
212 | errata.piix4.fdma = 1; | |
213 | pci_dev_put(dev); | |
214 | } | |
215 | ||
216 | break; | |
217 | } | |
218 | ||
219 | if (errata.piix4.bmisx) | |
220 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 221 | "Bus master activity detection (BM-IDE) erratum enabled\n")); |
1da177e4 LT |
222 | if (errata.piix4.fdma) |
223 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 224 | "Type-F DMA livelock erratum (C3 disabled)\n")); |
1da177e4 | 225 | |
d550d98d | 226 | return 0; |
1da177e4 LT |
227 | } |
228 | ||
8713cbef | 229 | static int acpi_processor_errata(struct acpi_processor *pr) |
1da177e4 | 230 | { |
4be44fcd LB |
231 | int result = 0; |
232 | struct pci_dev *dev = NULL; | |
1da177e4 | 233 | |
1da177e4 LT |
234 | |
235 | if (!pr) | |
d550d98d | 236 | return -EINVAL; |
1da177e4 LT |
237 | |
238 | /* | |
239 | * PIIX4 | |
240 | */ | |
241 | dev = pci_get_subsys(PCI_VENDOR_ID_INTEL, | |
4be44fcd LB |
242 | PCI_DEVICE_ID_INTEL_82371AB_3, PCI_ANY_ID, |
243 | PCI_ANY_ID, NULL); | |
1da177e4 LT |
244 | if (dev) { |
245 | result = acpi_processor_errata_piix4(dev); | |
246 | pci_dev_put(dev); | |
247 | } | |
248 | ||
d550d98d | 249 | return result; |
1da177e4 LT |
250 | } |
251 | ||
02df8b93 | 252 | /* -------------------------------------------------------------------------- |
0b28002f | 253 | Common ACPI processor functions |
02df8b93 VP |
254 | -------------------------------------------------------------------------- */ |
255 | ||
256 | /* | |
257 | * _PDC is required for a BIOS-OS handshake for most of the newer | |
258 | * ACPI processor features. | |
259 | */ | |
05131ecc | 260 | static int acpi_processor_set_pdc(struct acpi_processor *pr) |
02df8b93 | 261 | { |
05131ecc | 262 | struct acpi_object_list *pdc_in = pr->pdc; |
4be44fcd | 263 | acpi_status status = AE_OK; |
02df8b93 | 264 | |
02df8b93 | 265 | |
05131ecc | 266 | if (!pdc_in) |
d550d98d | 267 | return status; |
02df8b93 | 268 | |
05131ecc | 269 | status = acpi_evaluate_object(pr->handle, "_PDC", pdc_in, NULL); |
02df8b93 | 270 | |
05131ecc | 271 | if (ACPI_FAILURE(status)) |
4be44fcd | 272 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
05131ecc | 273 | "Could not evaluate _PDC, using legacy perf. control...\n")); |
02df8b93 | 274 | |
d550d98d | 275 | return status; |
02df8b93 VP |
276 | } |
277 | ||
1da177e4 LT |
278 | /* -------------------------------------------------------------------------- |
279 | FS Interface (/proc) | |
280 | -------------------------------------------------------------------------- */ | |
281 | ||
4be44fcd | 282 | static struct proc_dir_entry *acpi_processor_dir = NULL; |
1da177e4 LT |
283 | |
284 | static int acpi_processor_info_seq_show(struct seq_file *seq, void *offset) | |
285 | { | |
50dd0969 | 286 | struct acpi_processor *pr = seq->private; |
1da177e4 | 287 | |
1da177e4 LT |
288 | |
289 | if (!pr) | |
290 | goto end; | |
291 | ||
292 | seq_printf(seq, "processor id: %d\n" | |
4be44fcd LB |
293 | "acpi id: %d\n" |
294 | "bus mastering control: %s\n" | |
295 | "power management: %s\n" | |
296 | "throttling control: %s\n" | |
297 | "limit interface: %s\n", | |
298 | pr->id, | |
299 | pr->acpi_id, | |
300 | pr->flags.bm_control ? "yes" : "no", | |
301 | pr->flags.power ? "yes" : "no", | |
302 | pr->flags.throttling ? "yes" : "no", | |
303 | pr->flags.limit ? "yes" : "no"); | |
304 | ||
305 | end: | |
d550d98d | 306 | return 0; |
1da177e4 LT |
307 | } |
308 | ||
309 | static int acpi_processor_info_open_fs(struct inode *inode, struct file *file) | |
310 | { | |
311 | return single_open(file, acpi_processor_info_seq_show, | |
4be44fcd | 312 | PDE(inode)->data); |
1da177e4 LT |
313 | } |
314 | ||
4be44fcd | 315 | static int acpi_processor_add_fs(struct acpi_device *device) |
1da177e4 | 316 | { |
4be44fcd | 317 | struct proc_dir_entry *entry = NULL; |
1da177e4 | 318 | |
1da177e4 LT |
319 | |
320 | if (!acpi_device_dir(device)) { | |
321 | acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), | |
4be44fcd | 322 | acpi_processor_dir); |
1da177e4 | 323 | if (!acpi_device_dir(device)) |
d550d98d | 324 | return -ENODEV; |
1da177e4 LT |
325 | } |
326 | acpi_device_dir(device)->owner = THIS_MODULE; | |
327 | ||
328 | /* 'info' [R] */ | |
329 | entry = create_proc_entry(ACPI_PROCESSOR_FILE_INFO, | |
4be44fcd | 330 | S_IRUGO, acpi_device_dir(device)); |
1da177e4 | 331 | if (!entry) |
d550d98d | 332 | return -EIO; |
1da177e4 LT |
333 | else { |
334 | entry->proc_fops = &acpi_processor_info_fops; | |
335 | entry->data = acpi_driver_data(device); | |
336 | entry->owner = THIS_MODULE; | |
337 | } | |
338 | ||
339 | /* 'throttling' [R/W] */ | |
340 | entry = create_proc_entry(ACPI_PROCESSOR_FILE_THROTTLING, | |
4be44fcd LB |
341 | S_IFREG | S_IRUGO | S_IWUSR, |
342 | acpi_device_dir(device)); | |
1da177e4 | 343 | if (!entry) |
d550d98d | 344 | return -EIO; |
1da177e4 LT |
345 | else { |
346 | entry->proc_fops = &acpi_processor_throttling_fops; | |
1da177e4 LT |
347 | entry->data = acpi_driver_data(device); |
348 | entry->owner = THIS_MODULE; | |
349 | } | |
350 | ||
351 | /* 'limit' [R/W] */ | |
352 | entry = create_proc_entry(ACPI_PROCESSOR_FILE_LIMIT, | |
4be44fcd LB |
353 | S_IFREG | S_IRUGO | S_IWUSR, |
354 | acpi_device_dir(device)); | |
1da177e4 | 355 | if (!entry) |
d550d98d | 356 | return -EIO; |
1da177e4 LT |
357 | else { |
358 | entry->proc_fops = &acpi_processor_limit_fops; | |
1da177e4 LT |
359 | entry->data = acpi_driver_data(device); |
360 | entry->owner = THIS_MODULE; | |
361 | } | |
362 | ||
d550d98d | 363 | return 0; |
1da177e4 LT |
364 | } |
365 | ||
4be44fcd | 366 | static int acpi_processor_remove_fs(struct acpi_device *device) |
1da177e4 | 367 | { |
1da177e4 LT |
368 | |
369 | if (acpi_device_dir(device)) { | |
4be44fcd LB |
370 | remove_proc_entry(ACPI_PROCESSOR_FILE_INFO, |
371 | acpi_device_dir(device)); | |
1da177e4 | 372 | remove_proc_entry(ACPI_PROCESSOR_FILE_THROTTLING, |
4be44fcd LB |
373 | acpi_device_dir(device)); |
374 | remove_proc_entry(ACPI_PROCESSOR_FILE_LIMIT, | |
375 | acpi_device_dir(device)); | |
1da177e4 LT |
376 | remove_proc_entry(acpi_device_bid(device), acpi_processor_dir); |
377 | acpi_device_dir(device) = NULL; | |
378 | } | |
379 | ||
d550d98d | 380 | return 0; |
1da177e4 LT |
381 | } |
382 | ||
383 | /* Use the acpiid in MADT to map cpus in case of SMP */ | |
f18c5a08 | 384 | |
1da177e4 | 385 | #ifndef CONFIG_SMP |
11bf04c4 | 386 | static int get_cpu_id(acpi_handle handle, u32 acpi_id) {return -1;} |
1da177e4 LT |
387 | #else |
388 | ||
f18c5a08 AS |
389 | static struct acpi_table_madt *madt; |
390 | ||
391 | static int map_lapic_id(struct acpi_subtable_header *entry, | |
392 | u32 acpi_id, int *apic_id) | |
393 | { | |
394 | struct acpi_madt_local_apic *lapic = | |
395 | (struct acpi_madt_local_apic *)entry; | |
396 | if ((lapic->lapic_flags & ACPI_MADT_ENABLED) && | |
397 | lapic->processor_id == acpi_id) { | |
398 | *apic_id = lapic->id; | |
399 | return 1; | |
400 | } | |
401 | return 0; | |
402 | } | |
403 | ||
404 | static int map_lsapic_id(struct acpi_subtable_header *entry, | |
405 | u32 acpi_id, int *apic_id) | |
406 | { | |
407 | struct acpi_madt_local_sapic *lsapic = | |
408 | (struct acpi_madt_local_sapic *)entry; | |
409 | /* Only check enabled APICs*/ | |
410 | if (lsapic->lapic_flags & ACPI_MADT_ENABLED) { | |
411 | /* First check against id */ | |
412 | if (lsapic->processor_id == acpi_id) { | |
615d5f23 | 413 | *apic_id = (lsapic->id << 8) | lsapic->eid; |
f18c5a08 AS |
414 | return 1; |
415 | /* Check against optional uid */ | |
416 | } else if (entry->length >= 16 && | |
417 | lsapic->uid == acpi_id) { | |
418 | *apic_id = lsapic->uid; | |
419 | return 1; | |
420 | } | |
421 | } | |
422 | return 0; | |
423 | } | |
424 | ||
1da177e4 | 425 | #ifdef CONFIG_IA64 |
1da177e4 | 426 | #define arch_cpu_to_apicid ia64_cpu_to_sapicid |
1da177e4 | 427 | #else |
1da177e4 | 428 | #define arch_cpu_to_apicid x86_cpu_to_apicid |
1da177e4 LT |
429 | #endif |
430 | ||
f18c5a08 AS |
431 | static int map_madt_entry(u32 acpi_id) |
432 | { | |
433 | unsigned long madt_end, entry; | |
434 | int apic_id = -1; | |
435 | ||
436 | if (!madt) | |
437 | return apic_id; | |
438 | ||
439 | entry = (unsigned long)madt; | |
440 | madt_end = entry + madt->header.length; | |
441 | ||
442 | /* Parse all entries looking for a match. */ | |
443 | ||
444 | entry += sizeof(struct acpi_table_madt); | |
445 | while (entry + sizeof(struct acpi_subtable_header) < madt_end) { | |
446 | struct acpi_subtable_header *header = | |
447 | (struct acpi_subtable_header *)entry; | |
448 | if (header->type == ACPI_MADT_TYPE_LOCAL_APIC) { | |
449 | if (map_lapic_id(header, acpi_id, &apic_id)) | |
450 | break; | |
451 | } else if (header->type == ACPI_MADT_TYPE_LOCAL_SAPIC) { | |
452 | if (map_lsapic_id(header, acpi_id, &apic_id)) | |
453 | break; | |
454 | } | |
455 | entry += header->length; | |
456 | } | |
457 | return apic_id; | |
458 | } | |
459 | ||
460 | static int map_mat_entry(acpi_handle handle, u32 acpi_id) | |
461 | { | |
462 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
463 | union acpi_object *obj; | |
464 | struct acpi_subtable_header *header; | |
465 | int apic_id = -1; | |
466 | ||
467 | if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer))) | |
468 | goto exit; | |
469 | ||
470 | if (!buffer.length || !buffer.pointer) | |
471 | goto exit; | |
472 | ||
473 | obj = buffer.pointer; | |
474 | if (obj->type != ACPI_TYPE_BUFFER || | |
475 | obj->buffer.length < sizeof(struct acpi_subtable_header)) { | |
476 | goto exit; | |
477 | } | |
478 | ||
479 | header = (struct acpi_subtable_header *)obj->buffer.pointer; | |
480 | if (header->type == ACPI_MADT_TYPE_LOCAL_APIC) { | |
481 | map_lapic_id(header, acpi_id, &apic_id); | |
482 | } else if (header->type == ACPI_MADT_TYPE_LOCAL_SAPIC) { | |
483 | map_lsapic_id(header, acpi_id, &apic_id); | |
484 | } | |
485 | ||
486 | exit: | |
487 | if (buffer.pointer) | |
488 | kfree(buffer.pointer); | |
489 | return apic_id; | |
490 | } | |
491 | ||
11bf04c4 | 492 | static int get_cpu_id(acpi_handle handle, u32 acpi_id) |
1da177e4 | 493 | { |
4a35a46b | 494 | int i; |
f18c5a08 | 495 | int apic_id = -1; |
1da177e4 | 496 | |
f18c5a08 AS |
497 | apic_id = map_mat_entry(handle, acpi_id); |
498 | if (apic_id == -1) | |
499 | apic_id = map_madt_entry(acpi_id); | |
500 | if (apic_id == -1) | |
501 | return apic_id; | |
1da177e4 | 502 | |
f18c5a08 | 503 | for (i = 0; i < NR_CPUS; ++i) { |
4a35a46b LB |
504 | if (arch_cpu_to_apicid[i] == apic_id) |
505 | return i; | |
1da177e4 LT |
506 | } |
507 | return -1; | |
508 | } | |
509 | #endif | |
510 | ||
511 | /* -------------------------------------------------------------------------- | |
512 | Driver Interface | |
513 | -------------------------------------------------------------------------- */ | |
514 | ||
11bf04c4 | 515 | static int acpi_processor_get_info(struct acpi_processor *pr, unsigned has_uid) |
1da177e4 | 516 | { |
4be44fcd LB |
517 | acpi_status status = 0; |
518 | union acpi_object object = { 0 }; | |
519 | struct acpi_buffer buffer = { sizeof(union acpi_object), &object }; | |
df42baa0 | 520 | int cpu_index; |
4be44fcd | 521 | static int cpu0_initialized; |
1da177e4 | 522 | |
1da177e4 LT |
523 | |
524 | if (!pr) | |
d550d98d | 525 | return -EINVAL; |
1da177e4 LT |
526 | |
527 | if (num_online_cpus() > 1) | |
528 | errata.smp = TRUE; | |
529 | ||
530 | acpi_processor_errata(pr); | |
531 | ||
532 | /* | |
533 | * Check to see if we have bus mastering arbitration control. This | |
534 | * is required for proper C3 usage (to maintain cache coherency). | |
535 | */ | |
cee324b1 | 536 | if (acpi_gbl_FADT.pm2_control_block && acpi_gbl_FADT.pm2_control_length) { |
1da177e4 LT |
537 | pr->flags.bm_control = 1; |
538 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd LB |
539 | "Bus mastering arbitration control present\n")); |
540 | } else | |
1da177e4 | 541 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
4be44fcd | 542 | "No bus mastering arbitration control\n")); |
1da177e4 | 543 | |
11bf04c4 AS |
544 | /* Check if it is a Device with HID and UID */ |
545 | if (has_uid) { | |
546 | unsigned long value; | |
547 | status = acpi_evaluate_integer(pr->handle, METHOD_NAME__UID, | |
548 | NULL, &value); | |
549 | if (ACPI_FAILURE(status)) { | |
550 | printk(KERN_ERR PREFIX "Evaluating processor _UID\n"); | |
551 | return -ENODEV; | |
552 | } | |
553 | pr->acpi_id = value; | |
554 | } else { | |
555 | /* | |
556 | * Evalute the processor object. Note that it is common on SMP to | |
557 | * have the first (boot) processor with a valid PBLK address while | |
558 | * all others have a NULL address. | |
559 | */ | |
560 | status = acpi_evaluate_object(pr->handle, NULL, NULL, &buffer); | |
561 | if (ACPI_FAILURE(status)) { | |
562 | printk(KERN_ERR PREFIX "Evaluating processor object\n"); | |
563 | return -ENODEV; | |
564 | } | |
1da177e4 | 565 | |
11bf04c4 AS |
566 | /* |
567 | * TBD: Synch processor ID (via LAPIC/LSAPIC structures) on SMP. | |
568 | * >>> 'acpi_get_processor_id(acpi_id, &id)' in arch/xxx/acpi.c | |
569 | */ | |
570 | pr->acpi_id = object.processor.proc_id; | |
571 | } | |
572 | cpu_index = get_cpu_id(pr->handle, pr->acpi_id); | |
1da177e4 | 573 | |
4be44fcd | 574 | /* Handle UP system running SMP kernel, with no LAPIC in MADT */ |
df42baa0 | 575 | if (!cpu0_initialized && (cpu_index == -1) && |
4be44fcd LB |
576 | (num_online_cpus() == 1)) { |
577 | cpu_index = 0; | |
578 | } | |
579 | ||
580 | cpu0_initialized = 1; | |
581 | ||
582 | pr->id = cpu_index; | |
583 | ||
584 | /* | |
585 | * Extra Processor objects may be enumerated on MP systems with | |
586 | * less than the max # of CPUs. They should be ignored _iff | |
587 | * they are physically not present. | |
588 | */ | |
f18c5a08 | 589 | if (pr->id == -1) { |
4be44fcd LB |
590 | if (ACPI_FAILURE |
591 | (acpi_processor_hotadd_init(pr->handle, &pr->id))) { | |
d550d98d | 592 | return -ENODEV; |
4be44fcd LB |
593 | } |
594 | } | |
1da177e4 LT |
595 | |
596 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Processor [%d:%d]\n", pr->id, | |
4be44fcd | 597 | pr->acpi_id)); |
1da177e4 LT |
598 | |
599 | if (!object.processor.pblk_address) | |
600 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No PBLK (NULL address)\n")); | |
601 | else if (object.processor.pblk_length != 6) | |
6468463a LB |
602 | printk(KERN_ERR PREFIX "Invalid PBLK length [%d]\n", |
603 | object.processor.pblk_length); | |
1da177e4 LT |
604 | else { |
605 | pr->throttling.address = object.processor.pblk_address; | |
cee324b1 AS |
606 | pr->throttling.duty_offset = acpi_gbl_FADT.duty_offset; |
607 | pr->throttling.duty_width = acpi_gbl_FADT.duty_width; | |
1da177e4 LT |
608 | |
609 | pr->pblk = object.processor.pblk_address; | |
610 | ||
611 | /* | |
612 | * We don't care about error returns - we just try to mark | |
613 | * these reserved so that nobody else is confused into thinking | |
614 | * that this region might be unused.. | |
615 | * | |
616 | * (In particular, allocating the IO range for Cardbus) | |
617 | */ | |
618 | request_region(pr->throttling.address, 6, "ACPI CPU throttle"); | |
619 | } | |
620 | ||
621 | #ifdef CONFIG_CPU_FREQ | |
622 | acpi_processor_ppc_has_changed(pr); | |
623 | #endif | |
624 | acpi_processor_get_throttling_info(pr); | |
625 | acpi_processor_get_limit_info(pr); | |
626 | ||
d550d98d | 627 | return 0; |
1da177e4 LT |
628 | } |
629 | ||
cd8e2b48 VP |
630 | static void *processor_device_array[NR_CPUS]; |
631 | ||
7af8b660 | 632 | static int __cpuinit acpi_processor_start(struct acpi_device *device) |
1da177e4 | 633 | { |
4be44fcd LB |
634 | int result = 0; |
635 | acpi_status status = AE_OK; | |
636 | struct acpi_processor *pr; | |
1da177e4 | 637 | |
1da177e4 LT |
638 | |
639 | pr = acpi_driver_data(device); | |
640 | ||
11bf04c4 | 641 | result = acpi_processor_get_info(pr, device->flags.unique_id); |
1da177e4 LT |
642 | if (result) { |
643 | /* Processor is physically not present */ | |
d550d98d | 644 | return 0; |
1da177e4 LT |
645 | } |
646 | ||
647 | BUG_ON((pr->id >= NR_CPUS) || (pr->id < 0)); | |
648 | ||
cd8e2b48 VP |
649 | /* |
650 | * Buggy BIOS check | |
651 | * ACPI id of processors can be reported wrongly by the BIOS. | |
652 | * Don't trust it blindly | |
653 | */ | |
654 | if (processor_device_array[pr->id] != NULL && | |
50dd0969 | 655 | processor_device_array[pr->id] != device) { |
0eacee58 LB |
656 | printk(KERN_WARNING "BIOS reported wrong ACPI id" |
657 | "for the processor\n"); | |
d550d98d | 658 | return -ENODEV; |
cd8e2b48 | 659 | } |
50dd0969 | 660 | processor_device_array[pr->id] = device; |
cd8e2b48 | 661 | |
1da177e4 LT |
662 | processors[pr->id] = pr; |
663 | ||
664 | result = acpi_processor_add_fs(device); | |
665 | if (result) | |
666 | goto end; | |
667 | ||
668 | status = acpi_install_notify_handler(pr->handle, ACPI_DEVICE_NOTIFY, | |
4be44fcd | 669 | acpi_processor_notify, pr); |
1da177e4 | 670 | |
05131ecc VP |
671 | /* _PDC call should be done before doing anything else (if reqd.). */ |
672 | arch_acpi_processor_init_pdc(pr); | |
673 | acpi_processor_set_pdc(pr); | |
674 | ||
1da177e4 LT |
675 | acpi_processor_power_init(pr, device); |
676 | ||
677 | if (pr->flags.throttling) { | |
678 | printk(KERN_INFO PREFIX "%s [%s] (supports", | |
4be44fcd | 679 | acpi_device_name(device), acpi_device_bid(device)); |
1da177e4 LT |
680 | printk(" %d throttling states", pr->throttling.state_count); |
681 | printk(")\n"); | |
682 | } | |
683 | ||
4be44fcd | 684 | end: |
1da177e4 | 685 | |
d550d98d | 686 | return result; |
1da177e4 LT |
687 | } |
688 | ||
4be44fcd | 689 | static void acpi_processor_notify(acpi_handle handle, u32 event, void *data) |
1da177e4 | 690 | { |
50dd0969 | 691 | struct acpi_processor *pr = data; |
4be44fcd | 692 | struct acpi_device *device = NULL; |
1da177e4 | 693 | |
1da177e4 LT |
694 | |
695 | if (!pr) | |
d550d98d | 696 | return; |
1da177e4 LT |
697 | |
698 | if (acpi_bus_get_device(pr->handle, &device)) | |
d550d98d | 699 | return; |
1da177e4 LT |
700 | |
701 | switch (event) { | |
702 | case ACPI_PROCESSOR_NOTIFY_PERFORMANCE: | |
703 | acpi_processor_ppc_has_changed(pr); | |
14e04fb3 | 704 | acpi_bus_generate_proc_event(device, event, |
4be44fcd | 705 | pr->performance_platform_limit); |
962ce8ca ZR |
706 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
707 | device->dev.bus_id, event, | |
708 | pr->performance_platform_limit); | |
1da177e4 LT |
709 | break; |
710 | case ACPI_PROCESSOR_NOTIFY_POWER: | |
711 | acpi_processor_cst_has_changed(pr); | |
14e04fb3 | 712 | acpi_bus_generate_proc_event(device, event, 0); |
962ce8ca ZR |
713 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
714 | device->dev.bus_id, event, 0); | |
1da177e4 | 715 | break; |
01854e69 LY |
716 | case ACPI_PROCESSOR_NOTIFY_THROTTLING: |
717 | acpi_processor_tstate_has_changed(pr); | |
14e04fb3 | 718 | acpi_bus_generate_proc_event(device, event, 0); |
962ce8ca ZR |
719 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
720 | device->dev.bus_id, event, 0); | |
1da177e4 LT |
721 | default: |
722 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 723 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
724 | break; |
725 | } | |
726 | ||
d550d98d | 727 | return; |
1da177e4 LT |
728 | } |
729 | ||
729c6ba3 VP |
730 | static int acpi_cpu_soft_notify(struct notifier_block *nfb, |
731 | unsigned long action, void *hcpu) | |
732 | { | |
733 | unsigned int cpu = (unsigned long)hcpu; | |
734 | struct acpi_processor *pr = processors[cpu]; | |
735 | ||
736 | if (action == CPU_ONLINE && pr) { | |
737 | acpi_processor_ppc_has_changed(pr); | |
738 | acpi_processor_cst_has_changed(pr); | |
739 | acpi_processor_tstate_has_changed(pr); | |
740 | } | |
741 | return NOTIFY_OK; | |
742 | } | |
743 | ||
744 | static struct notifier_block acpi_cpu_notifier = | |
745 | { | |
746 | .notifier_call = acpi_cpu_soft_notify, | |
747 | }; | |
748 | ||
4be44fcd | 749 | static int acpi_processor_add(struct acpi_device *device) |
1da177e4 | 750 | { |
4be44fcd | 751 | struct acpi_processor *pr = NULL; |
1da177e4 | 752 | |
1da177e4 LT |
753 | |
754 | if (!device) | |
d550d98d | 755 | return -EINVAL; |
1da177e4 | 756 | |
36bcbec7 | 757 | pr = kzalloc(sizeof(struct acpi_processor), GFP_KERNEL); |
1da177e4 | 758 | if (!pr) |
d550d98d | 759 | return -ENOMEM; |
1da177e4 LT |
760 | |
761 | pr->handle = device->handle; | |
762 | strcpy(acpi_device_name(device), ACPI_PROCESSOR_DEVICE_NAME); | |
763 | strcpy(acpi_device_class(device), ACPI_PROCESSOR_CLASS); | |
764 | acpi_driver_data(device) = pr; | |
765 | ||
d550d98d | 766 | return 0; |
1da177e4 LT |
767 | } |
768 | ||
4be44fcd | 769 | static int acpi_processor_remove(struct acpi_device *device, int type) |
1da177e4 | 770 | { |
4be44fcd LB |
771 | acpi_status status = AE_OK; |
772 | struct acpi_processor *pr = NULL; | |
1da177e4 | 773 | |
1da177e4 LT |
774 | |
775 | if (!device || !acpi_driver_data(device)) | |
d550d98d | 776 | return -EINVAL; |
1da177e4 | 777 | |
50dd0969 | 778 | pr = acpi_driver_data(device); |
1da177e4 LT |
779 | |
780 | if (pr->id >= NR_CPUS) { | |
781 | kfree(pr); | |
d550d98d | 782 | return 0; |
1da177e4 LT |
783 | } |
784 | ||
785 | if (type == ACPI_BUS_REMOVAL_EJECT) { | |
786 | if (acpi_processor_handle_eject(pr)) | |
d550d98d | 787 | return -EINVAL; |
1da177e4 LT |
788 | } |
789 | ||
790 | acpi_processor_power_exit(pr, device); | |
791 | ||
792 | status = acpi_remove_notify_handler(pr->handle, ACPI_DEVICE_NOTIFY, | |
4be44fcd | 793 | acpi_processor_notify); |
1da177e4 LT |
794 | |
795 | acpi_processor_remove_fs(device); | |
796 | ||
797 | processors[pr->id] = NULL; | |
798 | ||
799 | kfree(pr); | |
800 | ||
d550d98d | 801 | return 0; |
1da177e4 LT |
802 | } |
803 | ||
804 | #ifdef CONFIG_ACPI_HOTPLUG_CPU | |
805 | /**************************************************************************** | |
806 | * Acpi processor hotplug support * | |
807 | ****************************************************************************/ | |
808 | ||
809 | static int is_processor_present(acpi_handle handle); | |
810 | ||
4be44fcd | 811 | static int is_processor_present(acpi_handle handle) |
1da177e4 | 812 | { |
4be44fcd LB |
813 | acpi_status status; |
814 | unsigned long sta = 0; | |
1da177e4 | 815 | |
1da177e4 LT |
816 | |
817 | status = acpi_evaluate_integer(handle, "_STA", NULL, &sta); | |
a0bd4ac4 | 818 | if (ACPI_FAILURE(status) || !(sta & ACPI_STA_DEVICE_PRESENT)) { |
a6fc6720 | 819 | ACPI_EXCEPTION((AE_INFO, status, "Processor Device is not present")); |
d550d98d | 820 | return 0; |
1da177e4 | 821 | } |
d550d98d | 822 | return 1; |
1da177e4 LT |
823 | } |
824 | ||
1da177e4 | 825 | static |
4be44fcd | 826 | int acpi_processor_device_add(acpi_handle handle, struct acpi_device **device) |
1da177e4 | 827 | { |
4be44fcd LB |
828 | acpi_handle phandle; |
829 | struct acpi_device *pdev; | |
830 | struct acpi_processor *pr; | |
1da177e4 | 831 | |
1da177e4 LT |
832 | |
833 | if (acpi_get_parent(handle, &phandle)) { | |
d550d98d | 834 | return -ENODEV; |
1da177e4 LT |
835 | } |
836 | ||
837 | if (acpi_bus_get_device(phandle, &pdev)) { | |
d550d98d | 838 | return -ENODEV; |
1da177e4 LT |
839 | } |
840 | ||
841 | if (acpi_bus_add(device, pdev, handle, ACPI_BUS_TYPE_PROCESSOR)) { | |
d550d98d | 842 | return -ENODEV; |
1da177e4 LT |
843 | } |
844 | ||
3fb02738 | 845 | acpi_bus_start(*device); |
1da177e4 LT |
846 | |
847 | pr = acpi_driver_data(*device); | |
848 | if (!pr) | |
d550d98d | 849 | return -ENODEV; |
1da177e4 | 850 | |
4be44fcd | 851 | if ((pr->id >= 0) && (pr->id < NR_CPUS)) { |
f883d9db | 852 | kobject_uevent(&(*device)->dev.kobj, KOBJ_ONLINE); |
1da177e4 | 853 | } |
d550d98d | 854 | return 0; |
1da177e4 LT |
855 | } |
856 | ||
1da177e4 | 857 | static void |
4be44fcd | 858 | acpi_processor_hotplug_notify(acpi_handle handle, u32 event, void *data) |
1da177e4 | 859 | { |
4be44fcd LB |
860 | struct acpi_processor *pr; |
861 | struct acpi_device *device = NULL; | |
1da177e4 LT |
862 | int result; |
863 | ||
1da177e4 LT |
864 | |
865 | switch (event) { | |
866 | case ACPI_NOTIFY_BUS_CHECK: | |
867 | case ACPI_NOTIFY_DEVICE_CHECK: | |
868 | printk("Processor driver received %s event\n", | |
4be44fcd LB |
869 | (event == ACPI_NOTIFY_BUS_CHECK) ? |
870 | "ACPI_NOTIFY_BUS_CHECK" : "ACPI_NOTIFY_DEVICE_CHECK"); | |
1da177e4 LT |
871 | |
872 | if (!is_processor_present(handle)) | |
873 | break; | |
874 | ||
875 | if (acpi_bus_get_device(handle, &device)) { | |
876 | result = acpi_processor_device_add(handle, &device); | |
877 | if (result) | |
6468463a LB |
878 | printk(KERN_ERR PREFIX |
879 | "Unable to add the device\n"); | |
1da177e4 LT |
880 | break; |
881 | } | |
882 | ||
883 | pr = acpi_driver_data(device); | |
884 | if (!pr) { | |
6468463a | 885 | printk(KERN_ERR PREFIX "Driver data is NULL\n"); |
1da177e4 LT |
886 | break; |
887 | } | |
888 | ||
889 | if (pr->id >= 0 && (pr->id < NR_CPUS)) { | |
f883d9db | 890 | kobject_uevent(&device->dev.kobj, KOBJ_OFFLINE); |
1da177e4 LT |
891 | break; |
892 | } | |
893 | ||
894 | result = acpi_processor_start(device); | |
4be44fcd | 895 | if ((!result) && ((pr->id >= 0) && (pr->id < NR_CPUS))) { |
f883d9db | 896 | kobject_uevent(&device->dev.kobj, KOBJ_ONLINE); |
1da177e4 | 897 | } else { |
6468463a LB |
898 | printk(KERN_ERR PREFIX "Device [%s] failed to start\n", |
899 | acpi_device_bid(device)); | |
1da177e4 | 900 | } |
4be44fcd | 901 | break; |
1da177e4 | 902 | case ACPI_NOTIFY_EJECT_REQUEST: |
4be44fcd LB |
903 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
904 | "received ACPI_NOTIFY_EJECT_REQUEST\n")); | |
1da177e4 LT |
905 | |
906 | if (acpi_bus_get_device(handle, &device)) { | |
6468463a LB |
907 | printk(KERN_ERR PREFIX |
908 | "Device don't exist, dropping EJECT\n"); | |
1da177e4 LT |
909 | break; |
910 | } | |
911 | pr = acpi_driver_data(device); | |
912 | if (!pr) { | |
6468463a LB |
913 | printk(KERN_ERR PREFIX |
914 | "Driver data is NULL, dropping EJECT\n"); | |
d550d98d | 915 | return; |
1da177e4 LT |
916 | } |
917 | ||
918 | if ((pr->id < NR_CPUS) && (cpu_present(pr->id))) | |
f883d9db | 919 | kobject_uevent(&device->dev.kobj, KOBJ_OFFLINE); |
1da177e4 LT |
920 | break; |
921 | default: | |
922 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 923 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
924 | break; |
925 | } | |
926 | ||
d550d98d | 927 | return; |
1da177e4 LT |
928 | } |
929 | ||
930 | static acpi_status | |
931 | processor_walk_namespace_cb(acpi_handle handle, | |
4be44fcd | 932 | u32 lvl, void *context, void **rv) |
1da177e4 | 933 | { |
4be44fcd | 934 | acpi_status status; |
1da177e4 | 935 | int *action = context; |
4be44fcd | 936 | acpi_object_type type = 0; |
1da177e4 LT |
937 | |
938 | status = acpi_get_type(handle, &type); | |
939 | if (ACPI_FAILURE(status)) | |
4be44fcd | 940 | return (AE_OK); |
1da177e4 LT |
941 | |
942 | if (type != ACPI_TYPE_PROCESSOR) | |
4be44fcd | 943 | return (AE_OK); |
1da177e4 | 944 | |
4be44fcd | 945 | switch (*action) { |
1da177e4 LT |
946 | case INSTALL_NOTIFY_HANDLER: |
947 | acpi_install_notify_handler(handle, | |
4be44fcd LB |
948 | ACPI_SYSTEM_NOTIFY, |
949 | acpi_processor_hotplug_notify, | |
950 | NULL); | |
1da177e4 LT |
951 | break; |
952 | case UNINSTALL_NOTIFY_HANDLER: | |
953 | acpi_remove_notify_handler(handle, | |
4be44fcd LB |
954 | ACPI_SYSTEM_NOTIFY, |
955 | acpi_processor_hotplug_notify); | |
1da177e4 LT |
956 | break; |
957 | default: | |
958 | break; | |
959 | } | |
960 | ||
4be44fcd | 961 | return (AE_OK); |
1da177e4 LT |
962 | } |
963 | ||
4be44fcd | 964 | static acpi_status acpi_processor_hotadd_init(acpi_handle handle, int *p_cpu) |
1da177e4 | 965 | { |
1da177e4 LT |
966 | |
967 | if (!is_processor_present(handle)) { | |
d550d98d | 968 | return AE_ERROR; |
1da177e4 LT |
969 | } |
970 | ||
971 | if (acpi_map_lsapic(handle, p_cpu)) | |
d550d98d | 972 | return AE_ERROR; |
1da177e4 LT |
973 | |
974 | if (arch_register_cpu(*p_cpu)) { | |
975 | acpi_unmap_lsapic(*p_cpu); | |
d550d98d | 976 | return AE_ERROR; |
1da177e4 LT |
977 | } |
978 | ||
d550d98d | 979 | return AE_OK; |
1da177e4 LT |
980 | } |
981 | ||
4be44fcd | 982 | static int acpi_processor_handle_eject(struct acpi_processor *pr) |
1da177e4 LT |
983 | { |
984 | if (cpu_online(pr->id)) { | |
4be44fcd | 985 | return (-EINVAL); |
1da177e4 LT |
986 | } |
987 | arch_unregister_cpu(pr->id); | |
988 | acpi_unmap_lsapic(pr->id); | |
4be44fcd | 989 | return (0); |
1da177e4 LT |
990 | } |
991 | #else | |
4be44fcd | 992 | static acpi_status acpi_processor_hotadd_init(acpi_handle handle, int *p_cpu) |
1da177e4 LT |
993 | { |
994 | return AE_ERROR; | |
995 | } | |
4be44fcd | 996 | static int acpi_processor_handle_eject(struct acpi_processor *pr) |
1da177e4 | 997 | { |
4be44fcd | 998 | return (-EINVAL); |
1da177e4 LT |
999 | } |
1000 | #endif | |
1001 | ||
1da177e4 LT |
1002 | static |
1003 | void acpi_processor_install_hotplug_notify(void) | |
1004 | { | |
1005 | #ifdef CONFIG_ACPI_HOTPLUG_CPU | |
1006 | int action = INSTALL_NOTIFY_HANDLER; | |
1007 | acpi_walk_namespace(ACPI_TYPE_PROCESSOR, | |
4be44fcd LB |
1008 | ACPI_ROOT_OBJECT, |
1009 | ACPI_UINT32_MAX, | |
1010 | processor_walk_namespace_cb, &action, NULL); | |
1da177e4 | 1011 | #endif |
729c6ba3 | 1012 | register_hotcpu_notifier(&acpi_cpu_notifier); |
1da177e4 LT |
1013 | } |
1014 | ||
1da177e4 LT |
1015 | static |
1016 | void acpi_processor_uninstall_hotplug_notify(void) | |
1017 | { | |
1018 | #ifdef CONFIG_ACPI_HOTPLUG_CPU | |
1019 | int action = UNINSTALL_NOTIFY_HANDLER; | |
1020 | acpi_walk_namespace(ACPI_TYPE_PROCESSOR, | |
4be44fcd LB |
1021 | ACPI_ROOT_OBJECT, |
1022 | ACPI_UINT32_MAX, | |
1023 | processor_walk_namespace_cb, &action, NULL); | |
1da177e4 | 1024 | #endif |
729c6ba3 | 1025 | unregister_hotcpu_notifier(&acpi_cpu_notifier); |
1da177e4 LT |
1026 | } |
1027 | ||
1028 | /* | |
1029 | * We keep the driver loaded even when ACPI is not running. | |
1030 | * This is needed for the powernow-k8 driver, that works even without | |
1031 | * ACPI, but needs symbols from this driver | |
1032 | */ | |
1033 | ||
4be44fcd | 1034 | static int __init acpi_processor_init(void) |
1da177e4 | 1035 | { |
4be44fcd | 1036 | int result = 0; |
1da177e4 | 1037 | |
1da177e4 LT |
1038 | |
1039 | memset(&processors, 0, sizeof(processors)); | |
1040 | memset(&errata, 0, sizeof(errata)); | |
1041 | ||
f18c5a08 AS |
1042 | #ifdef CONFIG_SMP |
1043 | if (ACPI_FAILURE(acpi_get_table(ACPI_SIG_MADT, 0, | |
1044 | (struct acpi_table_header **)&madt))) | |
70c0846e | 1045 | madt = NULL; |
f18c5a08 AS |
1046 | #endif |
1047 | ||
1da177e4 LT |
1048 | acpi_processor_dir = proc_mkdir(ACPI_PROCESSOR_CLASS, acpi_root_dir); |
1049 | if (!acpi_processor_dir) | |
83822fc9 | 1050 | return -ENOMEM; |
1da177e4 LT |
1051 | acpi_processor_dir->owner = THIS_MODULE; |
1052 | ||
4f86d3a8 LB |
1053 | result = cpuidle_register_driver(&acpi_idle_driver); |
1054 | if (result < 0) | |
1055 | goto out_proc; | |
1056 | ||
1da177e4 | 1057 | result = acpi_bus_register_driver(&acpi_processor_driver); |
4f86d3a8 LB |
1058 | if (result < 0) |
1059 | goto out_cpuidle; | |
1da177e4 LT |
1060 | |
1061 | acpi_processor_install_hotplug_notify(); | |
1062 | ||
1063 | acpi_thermal_cpufreq_init(); | |
1064 | ||
1065 | acpi_processor_ppc_init(); | |
1066 | ||
d550d98d | 1067 | return 0; |
4f86d3a8 LB |
1068 | |
1069 | out_cpuidle: | |
1070 | cpuidle_unregister_driver(&acpi_idle_driver); | |
1071 | ||
1072 | out_proc: | |
1073 | remove_proc_entry(ACPI_PROCESSOR_CLASS, acpi_root_dir); | |
1074 | ||
1075 | return result; | |
1da177e4 LT |
1076 | } |
1077 | ||
4be44fcd | 1078 | static void __exit acpi_processor_exit(void) |
1da177e4 | 1079 | { |
1da177e4 LT |
1080 | acpi_processor_ppc_exit(); |
1081 | ||
1082 | acpi_thermal_cpufreq_exit(); | |
1083 | ||
1084 | acpi_processor_uninstall_hotplug_notify(); | |
1085 | ||
1086 | acpi_bus_unregister_driver(&acpi_processor_driver); | |
1087 | ||
4f86d3a8 LB |
1088 | cpuidle_unregister_driver(&acpi_idle_driver); |
1089 | ||
1da177e4 LT |
1090 | remove_proc_entry(ACPI_PROCESSOR_CLASS, acpi_root_dir); |
1091 | ||
d550d98d | 1092 | return; |
1da177e4 LT |
1093 | } |
1094 | ||
1da177e4 LT |
1095 | module_init(acpi_processor_init); |
1096 | module_exit(acpi_processor_exit); | |
1097 | ||
1098 | EXPORT_SYMBOL(acpi_processor_set_thermal_limit); | |
1099 | ||
1100 | MODULE_ALIAS("processor"); |