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 | ||
a192a958 LB |
62 | #define PREFIX "ACPI: " |
63 | ||
1da177e4 | 64 | #define ACPI_PROCESSOR_CLASS "processor" |
1da177e4 LT |
65 | #define ACPI_PROCESSOR_DEVICE_NAME "Processor" |
66 | #define ACPI_PROCESSOR_FILE_INFO "info" | |
67 | #define ACPI_PROCESSOR_FILE_THROTTLING "throttling" | |
68 | #define ACPI_PROCESSOR_FILE_LIMIT "limit" | |
69 | #define ACPI_PROCESSOR_NOTIFY_PERFORMANCE 0x80 | |
70 | #define ACPI_PROCESSOR_NOTIFY_POWER 0x81 | |
01854e69 | 71 | #define ACPI_PROCESSOR_NOTIFY_THROTTLING 0x82 |
1da177e4 LT |
72 | |
73 | #define ACPI_PROCESSOR_LIMIT_USER 0 | |
74 | #define ACPI_PROCESSOR_LIMIT_THERMAL 1 | |
75 | ||
1da177e4 | 76 | #define _COMPONENT ACPI_PROCESSOR_COMPONENT |
f52fd66d | 77 | ACPI_MODULE_NAME("processor_core"); |
1da177e4 | 78 | |
f52fd66d | 79 | MODULE_AUTHOR("Paul Diefenbaugh"); |
7cda93e0 | 80 | MODULE_DESCRIPTION("ACPI Processor Driver"); |
1da177e4 LT |
81 | MODULE_LICENSE("GPL"); |
82 | ||
4be44fcd | 83 | static int acpi_processor_add(struct acpi_device *device); |
4be44fcd | 84 | static int acpi_processor_remove(struct acpi_device *device, int type); |
74cad4ee | 85 | #ifdef CONFIG_ACPI_PROCFS |
1da177e4 | 86 | static int acpi_processor_info_open_fs(struct inode *inode, struct file *file); |
74cad4ee | 87 | #endif |
7ec0a729 | 88 | static void acpi_processor_notify(struct acpi_device *device, u32 event); |
1da177e4 LT |
89 | static acpi_status acpi_processor_hotadd_init(acpi_handle handle, int *p_cpu); |
90 | static int acpi_processor_handle_eject(struct acpi_processor *pr); | |
01854e69 | 91 | |
1da177e4 | 92 | |
1ba90e3a | 93 | static const struct acpi_device_id processor_device_ids[] = { |
ad93a765 | 94 | {ACPI_PROCESSOR_OBJECT_HID, 0}, |
9eccbc2f | 95 | {"ACPI0007", 0}, |
1ba90e3a TR |
96 | {"", 0}, |
97 | }; | |
98 | MODULE_DEVICE_TABLE(acpi, processor_device_ids); | |
99 | ||
1da177e4 | 100 | static struct acpi_driver acpi_processor_driver = { |
c2b6705b | 101 | .name = "processor", |
4be44fcd | 102 | .class = ACPI_PROCESSOR_CLASS, |
1ba90e3a | 103 | .ids = processor_device_ids, |
4be44fcd LB |
104 | .ops = { |
105 | .add = acpi_processor_add, | |
106 | .remove = acpi_processor_remove, | |
b04e7bdb TG |
107 | .suspend = acpi_processor_suspend, |
108 | .resume = acpi_processor_resume, | |
7ec0a729 | 109 | .notify = acpi_processor_notify, |
4be44fcd | 110 | }, |
1da177e4 LT |
111 | }; |
112 | ||
113 | #define INSTALL_NOTIFY_HANDLER 1 | |
114 | #define UNINSTALL_NOTIFY_HANDLER 2 | |
74cad4ee | 115 | #ifdef CONFIG_ACPI_PROCFS |
d7508032 | 116 | static const struct file_operations acpi_processor_info_fops = { |
cf7acfab | 117 | .owner = THIS_MODULE, |
4be44fcd LB |
118 | .open = acpi_processor_info_open_fs, |
119 | .read = seq_read, | |
120 | .llseek = seq_lseek, | |
121 | .release = single_release, | |
1da177e4 | 122 | }; |
74cad4ee | 123 | #endif |
1da177e4 | 124 | |
706546d0 | 125 | DEFINE_PER_CPU(struct acpi_processor *, processors); |
0f1d683f NC |
126 | EXPORT_PER_CPU_SYMBOL(processors); |
127 | ||
9f222718 | 128 | struct acpi_processor_errata errata __read_mostly; |
1da177e4 | 129 | |
1da177e4 LT |
130 | /* -------------------------------------------------------------------------- |
131 | Errata Handling | |
132 | -------------------------------------------------------------------------- */ | |
133 | ||
4be44fcd | 134 | static int acpi_processor_errata_piix4(struct pci_dev *dev) |
1da177e4 | 135 | { |
4be44fcd LB |
136 | u8 value1 = 0; |
137 | u8 value2 = 0; | |
1da177e4 | 138 | |
1da177e4 LT |
139 | |
140 | if (!dev) | |
d550d98d | 141 | return -EINVAL; |
1da177e4 LT |
142 | |
143 | /* | |
144 | * Note that 'dev' references the PIIX4 ACPI Controller. | |
145 | */ | |
146 | ||
44c10138 | 147 | switch (dev->revision) { |
1da177e4 LT |
148 | case 0: |
149 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found PIIX4 A-step\n")); | |
150 | break; | |
151 | case 1: | |
152 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found PIIX4 B-step\n")); | |
153 | break; | |
154 | case 2: | |
155 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found PIIX4E\n")); | |
156 | break; | |
157 | case 3: | |
158 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found PIIX4M\n")); | |
159 | break; | |
160 | default: | |
161 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found unknown PIIX4\n")); | |
162 | break; | |
163 | } | |
164 | ||
44c10138 | 165 | switch (dev->revision) { |
1da177e4 LT |
166 | |
167 | case 0: /* PIIX4 A-step */ | |
168 | case 1: /* PIIX4 B-step */ | |
169 | /* | |
170 | * See specification changes #13 ("Manual Throttle Duty Cycle") | |
171 | * and #14 ("Enabling and Disabling Manual Throttle"), plus | |
172 | * erratum #5 ("STPCLK# Deassertion Time") from the January | |
173 | * 2002 PIIX4 specification update. Applies to only older | |
174 | * PIIX4 models. | |
175 | */ | |
176 | errata.piix4.throttle = 1; | |
177 | ||
178 | case 2: /* PIIX4E */ | |
179 | case 3: /* PIIX4M */ | |
180 | /* | |
181 | * See erratum #18 ("C3 Power State/BMIDE and Type-F DMA | |
182 | * Livelock") from the January 2002 PIIX4 specification update. | |
183 | * Applies to all PIIX4 models. | |
184 | */ | |
185 | ||
186 | /* | |
187 | * BM-IDE | |
188 | * ------ | |
189 | * Find the PIIX4 IDE Controller and get the Bus Master IDE | |
190 | * Status register address. We'll use this later to read | |
191 | * each IDE controller's DMA status to make sure we catch all | |
192 | * DMA activity. | |
193 | */ | |
194 | dev = pci_get_subsys(PCI_VENDOR_ID_INTEL, | |
4be44fcd LB |
195 | PCI_DEVICE_ID_INTEL_82371AB, |
196 | PCI_ANY_ID, PCI_ANY_ID, NULL); | |
1da177e4 LT |
197 | if (dev) { |
198 | errata.piix4.bmisx = pci_resource_start(dev, 4); | |
199 | pci_dev_put(dev); | |
200 | } | |
201 | ||
202 | /* | |
203 | * Type-F DMA | |
204 | * ---------- | |
205 | * Find the PIIX4 ISA Controller and read the Motherboard | |
206 | * DMA controller's status to see if Type-F (Fast) DMA mode | |
207 | * is enabled (bit 7) on either channel. Note that we'll | |
208 | * disable C3 support if this is enabled, as some legacy | |
209 | * devices won't operate well if fast DMA is disabled. | |
210 | */ | |
211 | dev = pci_get_subsys(PCI_VENDOR_ID_INTEL, | |
4be44fcd LB |
212 | PCI_DEVICE_ID_INTEL_82371AB_0, |
213 | PCI_ANY_ID, PCI_ANY_ID, NULL); | |
1da177e4 LT |
214 | if (dev) { |
215 | pci_read_config_byte(dev, 0x76, &value1); | |
216 | pci_read_config_byte(dev, 0x77, &value2); | |
217 | if ((value1 & 0x80) || (value2 & 0x80)) | |
218 | errata.piix4.fdma = 1; | |
219 | pci_dev_put(dev); | |
220 | } | |
221 | ||
222 | break; | |
223 | } | |
224 | ||
225 | if (errata.piix4.bmisx) | |
226 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 227 | "Bus master activity detection (BM-IDE) erratum enabled\n")); |
1da177e4 LT |
228 | if (errata.piix4.fdma) |
229 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 230 | "Type-F DMA livelock erratum (C3 disabled)\n")); |
1da177e4 | 231 | |
d550d98d | 232 | return 0; |
1da177e4 LT |
233 | } |
234 | ||
8713cbef | 235 | static int acpi_processor_errata(struct acpi_processor *pr) |
1da177e4 | 236 | { |
4be44fcd LB |
237 | int result = 0; |
238 | struct pci_dev *dev = NULL; | |
1da177e4 | 239 | |
1da177e4 LT |
240 | |
241 | if (!pr) | |
d550d98d | 242 | return -EINVAL; |
1da177e4 LT |
243 | |
244 | /* | |
245 | * PIIX4 | |
246 | */ | |
247 | dev = pci_get_subsys(PCI_VENDOR_ID_INTEL, | |
4be44fcd LB |
248 | PCI_DEVICE_ID_INTEL_82371AB_3, PCI_ANY_ID, |
249 | PCI_ANY_ID, NULL); | |
1da177e4 LT |
250 | if (dev) { |
251 | result = acpi_processor_errata_piix4(dev); | |
252 | pci_dev_put(dev); | |
253 | } | |
254 | ||
d550d98d | 255 | return result; |
1da177e4 LT |
256 | } |
257 | ||
1da177e4 LT |
258 | /* -------------------------------------------------------------------------- |
259 | FS Interface (/proc) | |
260 | -------------------------------------------------------------------------- */ | |
261 | ||
74cad4ee | 262 | #ifdef CONFIG_ACPI_PROCFS |
4be44fcd | 263 | static struct proc_dir_entry *acpi_processor_dir = NULL; |
1da177e4 LT |
264 | |
265 | static int acpi_processor_info_seq_show(struct seq_file *seq, void *offset) | |
266 | { | |
50dd0969 | 267 | struct acpi_processor *pr = seq->private; |
1da177e4 | 268 | |
1da177e4 LT |
269 | |
270 | if (!pr) | |
271 | goto end; | |
272 | ||
273 | seq_printf(seq, "processor id: %d\n" | |
4be44fcd LB |
274 | "acpi id: %d\n" |
275 | "bus mastering control: %s\n" | |
276 | "power management: %s\n" | |
277 | "throttling control: %s\n" | |
278 | "limit interface: %s\n", | |
279 | pr->id, | |
280 | pr->acpi_id, | |
281 | pr->flags.bm_control ? "yes" : "no", | |
282 | pr->flags.power ? "yes" : "no", | |
283 | pr->flags.throttling ? "yes" : "no", | |
284 | pr->flags.limit ? "yes" : "no"); | |
285 | ||
286 | end: | |
d550d98d | 287 | return 0; |
1da177e4 LT |
288 | } |
289 | ||
290 | static int acpi_processor_info_open_fs(struct inode *inode, struct file *file) | |
291 | { | |
292 | return single_open(file, acpi_processor_info_seq_show, | |
4be44fcd | 293 | PDE(inode)->data); |
1da177e4 LT |
294 | } |
295 | ||
bf8b4542 | 296 | static int __cpuinit acpi_processor_add_fs(struct acpi_device *device) |
1da177e4 | 297 | { |
4be44fcd | 298 | struct proc_dir_entry *entry = NULL; |
1da177e4 | 299 | |
1da177e4 LT |
300 | |
301 | if (!acpi_device_dir(device)) { | |
302 | acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), | |
4be44fcd | 303 | acpi_processor_dir); |
1da177e4 | 304 | if (!acpi_device_dir(device)) |
d550d98d | 305 | return -ENODEV; |
1da177e4 | 306 | } |
1da177e4 LT |
307 | |
308 | /* 'info' [R] */ | |
cf7acfab DL |
309 | entry = proc_create_data(ACPI_PROCESSOR_FILE_INFO, |
310 | S_IRUGO, acpi_device_dir(device), | |
311 | &acpi_processor_info_fops, | |
312 | acpi_driver_data(device)); | |
1da177e4 | 313 | if (!entry) |
d550d98d | 314 | return -EIO; |
1da177e4 LT |
315 | |
316 | /* 'throttling' [R/W] */ | |
cf7acfab DL |
317 | entry = proc_create_data(ACPI_PROCESSOR_FILE_THROTTLING, |
318 | S_IFREG | S_IRUGO | S_IWUSR, | |
319 | acpi_device_dir(device), | |
320 | &acpi_processor_throttling_fops, | |
321 | acpi_driver_data(device)); | |
1da177e4 | 322 | if (!entry) |
d550d98d | 323 | return -EIO; |
1da177e4 LT |
324 | |
325 | /* 'limit' [R/W] */ | |
cf7acfab DL |
326 | entry = proc_create_data(ACPI_PROCESSOR_FILE_LIMIT, |
327 | S_IFREG | S_IRUGO | S_IWUSR, | |
328 | acpi_device_dir(device), | |
329 | &acpi_processor_limit_fops, | |
330 | acpi_driver_data(device)); | |
1da177e4 | 331 | if (!entry) |
d550d98d | 332 | return -EIO; |
d550d98d | 333 | return 0; |
1da177e4 | 334 | } |
4be44fcd | 335 | static int acpi_processor_remove_fs(struct acpi_device *device) |
1da177e4 | 336 | { |
1da177e4 LT |
337 | |
338 | if (acpi_device_dir(device)) { | |
4be44fcd LB |
339 | remove_proc_entry(ACPI_PROCESSOR_FILE_INFO, |
340 | acpi_device_dir(device)); | |
1da177e4 | 341 | remove_proc_entry(ACPI_PROCESSOR_FILE_THROTTLING, |
4be44fcd LB |
342 | acpi_device_dir(device)); |
343 | remove_proc_entry(ACPI_PROCESSOR_FILE_LIMIT, | |
344 | acpi_device_dir(device)); | |
1da177e4 LT |
345 | remove_proc_entry(acpi_device_bid(device), acpi_processor_dir); |
346 | acpi_device_dir(device) = NULL; | |
347 | } | |
348 | ||
d550d98d | 349 | return 0; |
1da177e4 | 350 | } |
74cad4ee ZY |
351 | #else |
352 | static inline int acpi_processor_add_fs(struct acpi_device *device) | |
353 | { | |
354 | return 0; | |
355 | } | |
356 | static inline int acpi_processor_remove_fs(struct acpi_device *device) | |
357 | { | |
358 | return 0; | |
359 | } | |
360 | #endif | |
1da177e4 LT |
361 | |
362 | /* Use the acpiid in MADT to map cpus in case of SMP */ | |
f18c5a08 | 363 | |
1da177e4 | 364 | #ifndef CONFIG_SMP |
b26e9286 | 365 | static int get_cpu_id(acpi_handle handle, int type, u32 acpi_id) { return -1; } |
1da177e4 LT |
366 | #else |
367 | ||
f18c5a08 AS |
368 | static struct acpi_table_madt *madt; |
369 | ||
370 | static int map_lapic_id(struct acpi_subtable_header *entry, | |
371 | u32 acpi_id, int *apic_id) | |
372 | { | |
373 | struct acpi_madt_local_apic *lapic = | |
374 | (struct acpi_madt_local_apic *)entry; | |
375 | if ((lapic->lapic_flags & ACPI_MADT_ENABLED) && | |
376 | lapic->processor_id == acpi_id) { | |
377 | *apic_id = lapic->id; | |
378 | return 1; | |
379 | } | |
380 | return 0; | |
381 | } | |
382 | ||
7237d3de SS |
383 | static int map_x2apic_id(struct acpi_subtable_header *entry, |
384 | int device_declaration, u32 acpi_id, int *apic_id) | |
385 | { | |
386 | struct acpi_madt_local_x2apic *apic = | |
387 | (struct acpi_madt_local_x2apic *)entry; | |
388 | u32 tmp = apic->local_apic_id; | |
389 | ||
390 | /* Only check enabled APICs*/ | |
391 | if (!(apic->lapic_flags & ACPI_MADT_ENABLED)) | |
392 | return 0; | |
393 | ||
394 | /* Device statement declaration type */ | |
395 | if (device_declaration) { | |
396 | if (apic->uid == acpi_id) | |
397 | goto found; | |
398 | } | |
399 | ||
400 | return 0; | |
401 | found: | |
402 | *apic_id = tmp; | |
403 | return 1; | |
404 | } | |
405 | ||
f18c5a08 | 406 | static int map_lsapic_id(struct acpi_subtable_header *entry, |
b26e9286 | 407 | int device_declaration, u32 acpi_id, int *apic_id) |
f18c5a08 AS |
408 | { |
409 | struct acpi_madt_local_sapic *lsapic = | |
410 | (struct acpi_madt_local_sapic *)entry; | |
b26e9286 MS |
411 | u32 tmp = (lsapic->id << 8) | lsapic->eid; |
412 | ||
f18c5a08 | 413 | /* Only check enabled APICs*/ |
b26e9286 MS |
414 | if (!(lsapic->lapic_flags & ACPI_MADT_ENABLED)) |
415 | return 0; | |
416 | ||
417 | /* Device statement declaration type */ | |
418 | if (device_declaration) { | |
419 | if (entry->length < 16) | |
420 | printk(KERN_ERR PREFIX | |
421 | "Invalid LSAPIC with Device type processor (SAPIC ID %#x)\n", | |
422 | tmp); | |
423 | else if (lsapic->uid == acpi_id) | |
424 | goto found; | |
425 | /* Processor statement declaration type */ | |
426 | } else if (lsapic->processor_id == acpi_id) | |
427 | goto found; | |
428 | ||
f18c5a08 | 429 | return 0; |
b26e9286 MS |
430 | found: |
431 | *apic_id = tmp; | |
432 | return 1; | |
f18c5a08 AS |
433 | } |
434 | ||
b26e9286 | 435 | static int map_madt_entry(int type, u32 acpi_id) |
f18c5a08 AS |
436 | { |
437 | unsigned long madt_end, entry; | |
438 | int apic_id = -1; | |
439 | ||
440 | if (!madt) | |
441 | return apic_id; | |
442 | ||
443 | entry = (unsigned long)madt; | |
444 | madt_end = entry + madt->header.length; | |
445 | ||
446 | /* Parse all entries looking for a match. */ | |
447 | ||
448 | entry += sizeof(struct acpi_table_madt); | |
449 | while (entry + sizeof(struct acpi_subtable_header) < madt_end) { | |
450 | struct acpi_subtable_header *header = | |
451 | (struct acpi_subtable_header *)entry; | |
452 | if (header->type == ACPI_MADT_TYPE_LOCAL_APIC) { | |
453 | if (map_lapic_id(header, acpi_id, &apic_id)) | |
454 | break; | |
7237d3de SS |
455 | } else if (header->type == ACPI_MADT_TYPE_LOCAL_X2APIC) { |
456 | if (map_x2apic_id(header, type, acpi_id, &apic_id)) | |
457 | break; | |
f18c5a08 | 458 | } else if (header->type == ACPI_MADT_TYPE_LOCAL_SAPIC) { |
b26e9286 | 459 | if (map_lsapic_id(header, type, acpi_id, &apic_id)) |
f18c5a08 AS |
460 | break; |
461 | } | |
462 | entry += header->length; | |
463 | } | |
464 | return apic_id; | |
465 | } | |
466 | ||
b26e9286 | 467 | static int map_mat_entry(acpi_handle handle, int type, u32 acpi_id) |
f18c5a08 AS |
468 | { |
469 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
470 | union acpi_object *obj; | |
471 | struct acpi_subtable_header *header; | |
472 | int apic_id = -1; | |
473 | ||
474 | if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer))) | |
475 | goto exit; | |
476 | ||
477 | if (!buffer.length || !buffer.pointer) | |
478 | goto exit; | |
479 | ||
480 | obj = buffer.pointer; | |
481 | if (obj->type != ACPI_TYPE_BUFFER || | |
482 | obj->buffer.length < sizeof(struct acpi_subtable_header)) { | |
483 | goto exit; | |
484 | } | |
485 | ||
486 | header = (struct acpi_subtable_header *)obj->buffer.pointer; | |
487 | if (header->type == ACPI_MADT_TYPE_LOCAL_APIC) { | |
488 | map_lapic_id(header, acpi_id, &apic_id); | |
489 | } else if (header->type == ACPI_MADT_TYPE_LOCAL_SAPIC) { | |
b26e9286 | 490 | map_lsapic_id(header, type, acpi_id, &apic_id); |
f18c5a08 AS |
491 | } |
492 | ||
493 | exit: | |
494 | if (buffer.pointer) | |
495 | kfree(buffer.pointer); | |
496 | return apic_id; | |
497 | } | |
498 | ||
b26e9286 | 499 | static int get_cpu_id(acpi_handle handle, int type, u32 acpi_id) |
1da177e4 | 500 | { |
4a35a46b | 501 | int i; |
f18c5a08 | 502 | int apic_id = -1; |
1da177e4 | 503 | |
b26e9286 | 504 | apic_id = map_mat_entry(handle, type, acpi_id); |
f18c5a08 | 505 | if (apic_id == -1) |
b26e9286 | 506 | apic_id = map_madt_entry(type, acpi_id); |
f18c5a08 AS |
507 | if (apic_id == -1) |
508 | return apic_id; | |
1da177e4 | 509 | |
fbb43ab0 | 510 | for_each_possible_cpu(i) { |
71b31233 | 511 | if (cpu_physical_id(i) == apic_id) |
4a35a46b | 512 | return i; |
1da177e4 LT |
513 | } |
514 | return -1; | |
515 | } | |
516 | #endif | |
517 | ||
518 | /* -------------------------------------------------------------------------- | |
519 | Driver Interface | |
520 | -------------------------------------------------------------------------- */ | |
521 | ||
b26e9286 | 522 | static int acpi_processor_get_info(struct acpi_device *device) |
1da177e4 | 523 | { |
4be44fcd LB |
524 | acpi_status status = 0; |
525 | union acpi_object object = { 0 }; | |
526 | struct acpi_buffer buffer = { sizeof(union acpi_object), &object }; | |
b26e9286 MS |
527 | struct acpi_processor *pr; |
528 | int cpu_index, device_declaration = 0; | |
4be44fcd | 529 | static int cpu0_initialized; |
1da177e4 | 530 | |
b26e9286 | 531 | pr = acpi_driver_data(device); |
1da177e4 | 532 | if (!pr) |
d550d98d | 533 | return -EINVAL; |
1da177e4 LT |
534 | |
535 | if (num_online_cpus() > 1) | |
536 | errata.smp = TRUE; | |
537 | ||
538 | acpi_processor_errata(pr); | |
539 | ||
540 | /* | |
541 | * Check to see if we have bus mastering arbitration control. This | |
542 | * is required for proper C3 usage (to maintain cache coherency). | |
543 | */ | |
cee324b1 | 544 | if (acpi_gbl_FADT.pm2_control_block && acpi_gbl_FADT.pm2_control_length) { |
1da177e4 LT |
545 | pr->flags.bm_control = 1; |
546 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd LB |
547 | "Bus mastering arbitration control present\n")); |
548 | } else | |
1da177e4 | 549 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
4be44fcd | 550 | "No bus mastering arbitration control\n")); |
1da177e4 | 551 | |
6cc73b48 BH |
552 | if (!strcmp(acpi_device_hid(device), ACPI_PROCESSOR_OBJECT_HID)) { |
553 | /* Declared with "Processor" statement; match ProcessorID */ | |
554 | status = acpi_evaluate_object(pr->handle, NULL, NULL, &buffer); | |
555 | if (ACPI_FAILURE(status)) { | |
556 | printk(KERN_ERR PREFIX "Evaluating processor object\n"); | |
557 | return -ENODEV; | |
558 | } | |
559 | ||
560 | /* | |
561 | * TBD: Synch processor ID (via LAPIC/LSAPIC structures) on SMP. | |
562 | * >>> 'acpi_get_processor_id(acpi_id, &id)' in | |
563 | * arch/xxx/acpi.c | |
564 | */ | |
565 | pr->acpi_id = object.processor.proc_id; | |
566 | } else { | |
b26e9286 MS |
567 | /* |
568 | * Declared with "Device" statement; match _UID. | |
569 | * Note that we don't handle string _UIDs yet. | |
570 | */ | |
27663c58 | 571 | unsigned long long value; |
11bf04c4 AS |
572 | status = acpi_evaluate_integer(pr->handle, METHOD_NAME__UID, |
573 | NULL, &value); | |
574 | if (ACPI_FAILURE(status)) { | |
b26e9286 MS |
575 | printk(KERN_ERR PREFIX |
576 | "Evaluating processor _UID [%#x]\n", status); | |
11bf04c4 AS |
577 | return -ENODEV; |
578 | } | |
b26e9286 | 579 | device_declaration = 1; |
11bf04c4 | 580 | pr->acpi_id = value; |
11bf04c4 | 581 | } |
b26e9286 | 582 | cpu_index = get_cpu_id(pr->handle, device_declaration, pr->acpi_id); |
1da177e4 | 583 | |
4be44fcd | 584 | /* Handle UP system running SMP kernel, with no LAPIC in MADT */ |
df42baa0 | 585 | if (!cpu0_initialized && (cpu_index == -1) && |
4be44fcd LB |
586 | (num_online_cpus() == 1)) { |
587 | cpu_index = 0; | |
588 | } | |
589 | ||
590 | cpu0_initialized = 1; | |
591 | ||
592 | pr->id = cpu_index; | |
593 | ||
594 | /* | |
595 | * Extra Processor objects may be enumerated on MP systems with | |
596 | * less than the max # of CPUs. They should be ignored _iff | |
597 | * they are physically not present. | |
598 | */ | |
f18c5a08 | 599 | if (pr->id == -1) { |
4be44fcd LB |
600 | if (ACPI_FAILURE |
601 | (acpi_processor_hotadd_init(pr->handle, &pr->id))) { | |
d550d98d | 602 | return -ENODEV; |
4be44fcd LB |
603 | } |
604 | } | |
7a04b849 ZY |
605 | /* |
606 | * On some boxes several processors use the same processor bus id. | |
607 | * But they are located in different scope. For example: | |
608 | * \_SB.SCK0.CPU0 | |
609 | * \_SB.SCK1.CPU0 | |
610 | * Rename the processor device bus id. And the new bus id will be | |
611 | * generated as the following format: | |
612 | * CPU+CPU ID. | |
613 | */ | |
614 | sprintf(acpi_device_bid(device), "CPU%X", pr->id); | |
1da177e4 | 615 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Processor [%d:%d]\n", pr->id, |
4be44fcd | 616 | pr->acpi_id)); |
1da177e4 LT |
617 | |
618 | if (!object.processor.pblk_address) | |
619 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No PBLK (NULL address)\n")); | |
620 | else if (object.processor.pblk_length != 6) | |
6468463a LB |
621 | printk(KERN_ERR PREFIX "Invalid PBLK length [%d]\n", |
622 | object.processor.pblk_length); | |
1da177e4 LT |
623 | else { |
624 | pr->throttling.address = object.processor.pblk_address; | |
cee324b1 AS |
625 | pr->throttling.duty_offset = acpi_gbl_FADT.duty_offset; |
626 | pr->throttling.duty_width = acpi_gbl_FADT.duty_width; | |
1da177e4 LT |
627 | |
628 | pr->pblk = object.processor.pblk_address; | |
629 | ||
630 | /* | |
631 | * We don't care about error returns - we just try to mark | |
632 | * these reserved so that nobody else is confused into thinking | |
633 | * that this region might be unused.. | |
634 | * | |
635 | * (In particular, allocating the IO range for Cardbus) | |
636 | */ | |
637 | request_region(pr->throttling.address, 6, "ACPI CPU throttle"); | |
638 | } | |
639 | ||
fe086a7b AC |
640 | /* |
641 | * If ACPI describes a slot number for this CPU, we can use it | |
642 | * ensure we get the right value in the "physical id" field | |
643 | * of /proc/cpuinfo | |
644 | */ | |
645 | status = acpi_evaluate_object(pr->handle, "_SUN", NULL, &buffer); | |
646 | if (ACPI_SUCCESS(status)) | |
647 | arch_fix_phys_package_id(pr->id, object.integer.value); | |
648 | ||
d550d98d | 649 | return 0; |
1da177e4 LT |
650 | } |
651 | ||
706546d0 | 652 | static DEFINE_PER_CPU(void *, processor_device_array); |
cd8e2b48 | 653 | |
7ec0a729 | 654 | static void acpi_processor_notify(struct acpi_device *device, u32 event) |
1da177e4 | 655 | { |
7ec0a729 | 656 | struct acpi_processor *pr = acpi_driver_data(device); |
e790cc8b | 657 | int saved; |
1da177e4 LT |
658 | |
659 | if (!pr) | |
d550d98d | 660 | return; |
1da177e4 | 661 | |
1da177e4 LT |
662 | switch (event) { |
663 | case ACPI_PROCESSOR_NOTIFY_PERFORMANCE: | |
e790cc8b | 664 | saved = pr->performance_platform_limit; |
d81c45e1 | 665 | acpi_processor_ppc_has_changed(pr, 1); |
e790cc8b AS |
666 | if (saved == pr->performance_platform_limit) |
667 | break; | |
14e04fb3 | 668 | acpi_bus_generate_proc_event(device, event, |
4be44fcd | 669 | pr->performance_platform_limit); |
962ce8ca | 670 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
0794469d | 671 | dev_name(&device->dev), event, |
962ce8ca | 672 | pr->performance_platform_limit); |
1da177e4 LT |
673 | break; |
674 | case ACPI_PROCESSOR_NOTIFY_POWER: | |
675 | acpi_processor_cst_has_changed(pr); | |
14e04fb3 | 676 | acpi_bus_generate_proc_event(device, event, 0); |
962ce8ca | 677 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
0794469d | 678 | dev_name(&device->dev), event, 0); |
1da177e4 | 679 | break; |
01854e69 LY |
680 | case ACPI_PROCESSOR_NOTIFY_THROTTLING: |
681 | acpi_processor_tstate_has_changed(pr); | |
14e04fb3 | 682 | acpi_bus_generate_proc_event(device, event, 0); |
962ce8ca | 683 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
0794469d | 684 | dev_name(&device->dev), event, 0); |
1da177e4 LT |
685 | default: |
686 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 687 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
688 | break; |
689 | } | |
690 | ||
d550d98d | 691 | return; |
1da177e4 LT |
692 | } |
693 | ||
729c6ba3 VP |
694 | static int acpi_cpu_soft_notify(struct notifier_block *nfb, |
695 | unsigned long action, void *hcpu) | |
696 | { | |
697 | unsigned int cpu = (unsigned long)hcpu; | |
706546d0 | 698 | struct acpi_processor *pr = per_cpu(processors, cpu); |
729c6ba3 VP |
699 | |
700 | if (action == CPU_ONLINE && pr) { | |
d81c45e1 | 701 | acpi_processor_ppc_has_changed(pr, 0); |
729c6ba3 VP |
702 | acpi_processor_cst_has_changed(pr); |
703 | acpi_processor_tstate_has_changed(pr); | |
704 | } | |
705 | return NOTIFY_OK; | |
706 | } | |
707 | ||
708 | static struct notifier_block acpi_cpu_notifier = | |
709 | { | |
710 | .notifier_call = acpi_cpu_soft_notify, | |
711 | }; | |
712 | ||
941b10fa | 713 | static int __cpuinit acpi_processor_add(struct acpi_device *device) |
1da177e4 | 714 | { |
4be44fcd | 715 | struct acpi_processor *pr = NULL; |
970b0492 BH |
716 | int result = 0; |
717 | struct sys_device *sysdev; | |
1da177e4 | 718 | |
36bcbec7 | 719 | pr = kzalloc(sizeof(struct acpi_processor), GFP_KERNEL); |
1da177e4 | 720 | if (!pr) |
d550d98d | 721 | return -ENOMEM; |
1da177e4 | 722 | |
eaa95840 | 723 | if (!zalloc_cpumask_var(&pr->throttling.shared_cpu_map, GFP_KERNEL)) { |
2fdf66b4 RR |
724 | kfree(pr); |
725 | return -ENOMEM; | |
726 | } | |
727 | ||
1da177e4 LT |
728 | pr->handle = device->handle; |
729 | strcpy(acpi_device_name(device), ACPI_PROCESSOR_DEVICE_NAME); | |
730 | strcpy(acpi_device_class(device), ACPI_PROCESSOR_CLASS); | |
db89b4f0 | 731 | device->driver_data = pr; |
1da177e4 | 732 | |
b26e9286 | 733 | result = acpi_processor_get_info(device); |
1da177e4 LT |
734 | if (result) { |
735 | /* Processor is physically not present */ | |
d550d98d | 736 | return 0; |
1da177e4 LT |
737 | } |
738 | ||
fbb43ab0 | 739 | BUG_ON((pr->id >= nr_cpu_ids) || (pr->id < 0)); |
1da177e4 | 740 | |
cd8e2b48 VP |
741 | /* |
742 | * Buggy BIOS check | |
743 | * ACPI id of processors can be reported wrongly by the BIOS. | |
744 | * Don't trust it blindly | |
745 | */ | |
706546d0 MT |
746 | if (per_cpu(processor_device_array, pr->id) != NULL && |
747 | per_cpu(processor_device_array, pr->id) != device) { | |
4fdb2a05 | 748 | printk(KERN_WARNING "BIOS reported wrong ACPI id " |
0eacee58 | 749 | "for the processor\n"); |
970b0492 BH |
750 | result = -ENODEV; |
751 | goto err_free_cpumask; | |
cd8e2b48 | 752 | } |
706546d0 | 753 | per_cpu(processor_device_array, pr->id) = device; |
cd8e2b48 | 754 | |
706546d0 | 755 | per_cpu(processors, pr->id) = pr; |
1da177e4 LT |
756 | |
757 | result = acpi_processor_add_fs(device); | |
758 | if (result) | |
970b0492 | 759 | goto err_free_cpumask; |
1da177e4 | 760 | |
9f1eb99c | 761 | sysdev = get_cpu_sysdev(pr->id); |
d4e05261 BH |
762 | if (sysfs_create_link(&device->dev.kobj, &sysdev->kobj, "sysdev")) { |
763 | result = -EFAULT; | |
764 | goto err_remove_fs; | |
765 | } | |
9f1eb99c | 766 | |
05131ecc | 767 | /* _PDC call should be done before doing anything else (if reqd.). */ |
43bab25c | 768 | acpi_processor_set_pdc(pr->handle); |
7b768f07 | 769 | |
0ac3c571 | 770 | #ifdef CONFIG_CPU_FREQ |
d81c45e1 | 771 | acpi_processor_ppc_has_changed(pr, 0); |
0ac3c571 ZY |
772 | #endif |
773 | acpi_processor_get_throttling_info(pr); | |
774 | acpi_processor_get_limit_info(pr); | |
775 | ||
05131ecc | 776 | |
1da177e4 LT |
777 | acpi_processor_power_init(pr, device); |
778 | ||
d9460fd2 ZR |
779 | pr->cdev = thermal_cooling_device_register("Processor", device, |
780 | &processor_cooling_ops); | |
d76628c6 TS |
781 | if (IS_ERR(pr->cdev)) { |
782 | result = PTR_ERR(pr->cdev); | |
d4e05261 | 783 | goto err_power_exit; |
d76628c6 | 784 | } |
9030062f | 785 | |
13c41157 | 786 | dev_dbg(&device->dev, "registered as cooling_device%d\n", |
fc3a8828 | 787 | pr->cdev->id); |
9030062f JL |
788 | |
789 | result = sysfs_create_link(&device->dev.kobj, | |
790 | &pr->cdev->device.kobj, | |
791 | "thermal_cooling"); | |
d4e05261 | 792 | if (result) { |
9030062f | 793 | printk(KERN_ERR PREFIX "Create sysfs link\n"); |
d4e05261 BH |
794 | goto err_thermal_unregister; |
795 | } | |
9030062f JL |
796 | result = sysfs_create_link(&pr->cdev->device.kobj, |
797 | &device->dev.kobj, | |
798 | "device"); | |
d4e05261 | 799 | if (result) { |
9030062f | 800 | printk(KERN_ERR PREFIX "Create sysfs link\n"); |
d4e05261 BH |
801 | goto err_remove_sysfs; |
802 | } | |
d9460fd2 | 803 | |
d550d98d | 804 | return 0; |
d4e05261 BH |
805 | |
806 | err_remove_sysfs: | |
807 | sysfs_remove_link(&device->dev.kobj, "thermal_cooling"); | |
808 | err_thermal_unregister: | |
809 | thermal_cooling_device_unregister(pr->cdev); | |
810 | err_power_exit: | |
811 | acpi_processor_power_exit(pr, device); | |
812 | err_remove_fs: | |
813 | acpi_processor_remove_fs(device); | |
970b0492 BH |
814 | err_free_cpumask: |
815 | free_cpumask_var(pr->throttling.shared_cpu_map); | |
1da177e4 | 816 | |
d550d98d | 817 | return result; |
1da177e4 LT |
818 | } |
819 | ||
4be44fcd | 820 | static int acpi_processor_remove(struct acpi_device *device, int type) |
1da177e4 | 821 | { |
4be44fcd | 822 | struct acpi_processor *pr = NULL; |
1da177e4 | 823 | |
1da177e4 LT |
824 | |
825 | if (!device || !acpi_driver_data(device)) | |
d550d98d | 826 | return -EINVAL; |
1da177e4 | 827 | |
50dd0969 | 828 | pr = acpi_driver_data(device); |
1da177e4 | 829 | |
2fdf66b4 RR |
830 | if (pr->id >= nr_cpu_ids) |
831 | goto free; | |
1da177e4 LT |
832 | |
833 | if (type == ACPI_BUS_REMOVAL_EJECT) { | |
834 | if (acpi_processor_handle_eject(pr)) | |
d550d98d | 835 | return -EINVAL; |
1da177e4 LT |
836 | } |
837 | ||
838 | acpi_processor_power_exit(pr, device); | |
839 | ||
9f1eb99c ZR |
840 | sysfs_remove_link(&device->dev.kobj, "sysdev"); |
841 | ||
1da177e4 LT |
842 | acpi_processor_remove_fs(device); |
843 | ||
f28bb45e ZY |
844 | if (pr->cdev) { |
845 | sysfs_remove_link(&device->dev.kobj, "thermal_cooling"); | |
846 | sysfs_remove_link(&pr->cdev->device.kobj, "device"); | |
847 | thermal_cooling_device_unregister(pr->cdev); | |
848 | pr->cdev = NULL; | |
849 | } | |
d9460fd2 | 850 | |
706546d0 MT |
851 | per_cpu(processors, pr->id) = NULL; |
852 | per_cpu(processor_device_array, pr->id) = NULL; | |
2fdf66b4 RR |
853 | |
854 | free: | |
855 | free_cpumask_var(pr->throttling.shared_cpu_map); | |
1da177e4 LT |
856 | kfree(pr); |
857 | ||
d550d98d | 858 | return 0; |
1da177e4 LT |
859 | } |
860 | ||
861 | #ifdef CONFIG_ACPI_HOTPLUG_CPU | |
862 | /**************************************************************************** | |
863 | * Acpi processor hotplug support * | |
864 | ****************************************************************************/ | |
865 | ||
4be44fcd | 866 | static int is_processor_present(acpi_handle handle) |
1da177e4 | 867 | { |
4be44fcd | 868 | acpi_status status; |
27663c58 | 869 | unsigned long long sta = 0; |
1da177e4 | 870 | |
1da177e4 LT |
871 | |
872 | status = acpi_evaluate_integer(handle, "_STA", NULL, &sta); | |
cfaf3747 ZR |
873 | |
874 | if (ACPI_SUCCESS(status) && (sta & ACPI_STA_DEVICE_PRESENT)) | |
875 | return 1; | |
876 | ||
d0ce46f5 ZR |
877 | /* |
878 | * _STA is mandatory for a processor that supports hot plug | |
879 | */ | |
880 | if (status == AE_NOT_FOUND) | |
881 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
882 | "Processor does not support hot plug\n")); | |
883 | else | |
884 | ACPI_EXCEPTION((AE_INFO, status, | |
885 | "Processor Device is not present")); | |
cfaf3747 | 886 | return 0; |
1da177e4 LT |
887 | } |
888 | ||
1da177e4 | 889 | static |
4be44fcd | 890 | int acpi_processor_device_add(acpi_handle handle, struct acpi_device **device) |
1da177e4 | 891 | { |
4be44fcd LB |
892 | acpi_handle phandle; |
893 | struct acpi_device *pdev; | |
1da177e4 | 894 | |
1da177e4 LT |
895 | |
896 | if (acpi_get_parent(handle, &phandle)) { | |
d550d98d | 897 | return -ENODEV; |
1da177e4 LT |
898 | } |
899 | ||
900 | if (acpi_bus_get_device(phandle, &pdev)) { | |
d550d98d | 901 | return -ENODEV; |
1da177e4 LT |
902 | } |
903 | ||
904 | if (acpi_bus_add(device, pdev, handle, ACPI_BUS_TYPE_PROCESSOR)) { | |
d550d98d | 905 | return -ENODEV; |
1da177e4 LT |
906 | } |
907 | ||
d550d98d | 908 | return 0; |
1da177e4 LT |
909 | } |
910 | ||
b95e9e8d SR |
911 | static void __ref acpi_processor_hotplug_notify(acpi_handle handle, |
912 | u32 event, void *data) | |
1da177e4 | 913 | { |
4be44fcd LB |
914 | struct acpi_processor *pr; |
915 | struct acpi_device *device = NULL; | |
1da177e4 LT |
916 | int result; |
917 | ||
1da177e4 LT |
918 | |
919 | switch (event) { | |
920 | case ACPI_NOTIFY_BUS_CHECK: | |
921 | case ACPI_NOTIFY_DEVICE_CHECK: | |
d6f882e1 GC |
922 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
923 | "Processor driver received %s event\n", | |
4be44fcd | 924 | (event == ACPI_NOTIFY_BUS_CHECK) ? |
d6f882e1 | 925 | "ACPI_NOTIFY_BUS_CHECK" : "ACPI_NOTIFY_DEVICE_CHECK")); |
1da177e4 LT |
926 | |
927 | if (!is_processor_present(handle)) | |
928 | break; | |
929 | ||
930 | if (acpi_bus_get_device(handle, &device)) { | |
931 | result = acpi_processor_device_add(handle, &device); | |
932 | if (result) | |
6468463a LB |
933 | printk(KERN_ERR PREFIX |
934 | "Unable to add the device\n"); | |
1da177e4 LT |
935 | break; |
936 | } | |
4be44fcd | 937 | break; |
1da177e4 | 938 | case ACPI_NOTIFY_EJECT_REQUEST: |
4be44fcd LB |
939 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
940 | "received ACPI_NOTIFY_EJECT_REQUEST\n")); | |
1da177e4 LT |
941 | |
942 | if (acpi_bus_get_device(handle, &device)) { | |
6468463a LB |
943 | printk(KERN_ERR PREFIX |
944 | "Device don't exist, dropping EJECT\n"); | |
1da177e4 LT |
945 | break; |
946 | } | |
947 | pr = acpi_driver_data(device); | |
948 | if (!pr) { | |
6468463a LB |
949 | printk(KERN_ERR PREFIX |
950 | "Driver data is NULL, dropping EJECT\n"); | |
d550d98d | 951 | return; |
1da177e4 | 952 | } |
1da177e4 LT |
953 | break; |
954 | default: | |
955 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 956 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
957 | break; |
958 | } | |
959 | ||
d550d98d | 960 | return; |
1da177e4 LT |
961 | } |
962 | ||
963 | static acpi_status | |
964 | processor_walk_namespace_cb(acpi_handle handle, | |
4be44fcd | 965 | u32 lvl, void *context, void **rv) |
1da177e4 | 966 | { |
4be44fcd | 967 | acpi_status status; |
1da177e4 | 968 | int *action = context; |
4be44fcd | 969 | acpi_object_type type = 0; |
1da177e4 LT |
970 | |
971 | status = acpi_get_type(handle, &type); | |
972 | if (ACPI_FAILURE(status)) | |
4be44fcd | 973 | return (AE_OK); |
1da177e4 LT |
974 | |
975 | if (type != ACPI_TYPE_PROCESSOR) | |
4be44fcd | 976 | return (AE_OK); |
1da177e4 | 977 | |
4be44fcd | 978 | switch (*action) { |
1da177e4 LT |
979 | case INSTALL_NOTIFY_HANDLER: |
980 | acpi_install_notify_handler(handle, | |
4be44fcd LB |
981 | ACPI_SYSTEM_NOTIFY, |
982 | acpi_processor_hotplug_notify, | |
983 | NULL); | |
1da177e4 LT |
984 | break; |
985 | case UNINSTALL_NOTIFY_HANDLER: | |
986 | acpi_remove_notify_handler(handle, | |
4be44fcd LB |
987 | ACPI_SYSTEM_NOTIFY, |
988 | acpi_processor_hotplug_notify); | |
1da177e4 LT |
989 | break; |
990 | default: | |
991 | break; | |
992 | } | |
993 | ||
4be44fcd | 994 | return (AE_OK); |
1da177e4 LT |
995 | } |
996 | ||
4be44fcd | 997 | static acpi_status acpi_processor_hotadd_init(acpi_handle handle, int *p_cpu) |
1da177e4 | 998 | { |
1da177e4 LT |
999 | |
1000 | if (!is_processor_present(handle)) { | |
d550d98d | 1001 | return AE_ERROR; |
1da177e4 LT |
1002 | } |
1003 | ||
1004 | if (acpi_map_lsapic(handle, p_cpu)) | |
d550d98d | 1005 | return AE_ERROR; |
1da177e4 LT |
1006 | |
1007 | if (arch_register_cpu(*p_cpu)) { | |
1008 | acpi_unmap_lsapic(*p_cpu); | |
d550d98d | 1009 | return AE_ERROR; |
1da177e4 LT |
1010 | } |
1011 | ||
d550d98d | 1012 | return AE_OK; |
1da177e4 LT |
1013 | } |
1014 | ||
4be44fcd | 1015 | static int acpi_processor_handle_eject(struct acpi_processor *pr) |
1da177e4 | 1016 | { |
b62b8ef9 ZR |
1017 | if (cpu_online(pr->id)) |
1018 | cpu_down(pr->id); | |
1019 | ||
1da177e4 LT |
1020 | arch_unregister_cpu(pr->id); |
1021 | acpi_unmap_lsapic(pr->id); | |
4be44fcd | 1022 | return (0); |
1da177e4 LT |
1023 | } |
1024 | #else | |
4be44fcd | 1025 | static acpi_status acpi_processor_hotadd_init(acpi_handle handle, int *p_cpu) |
1da177e4 LT |
1026 | { |
1027 | return AE_ERROR; | |
1028 | } | |
4be44fcd | 1029 | static int acpi_processor_handle_eject(struct acpi_processor *pr) |
1da177e4 | 1030 | { |
4be44fcd | 1031 | return (-EINVAL); |
1da177e4 LT |
1032 | } |
1033 | #endif | |
1034 | ||
1da177e4 LT |
1035 | static |
1036 | void acpi_processor_install_hotplug_notify(void) | |
1037 | { | |
1038 | #ifdef CONFIG_ACPI_HOTPLUG_CPU | |
1039 | int action = INSTALL_NOTIFY_HANDLER; | |
1040 | acpi_walk_namespace(ACPI_TYPE_PROCESSOR, | |
4be44fcd LB |
1041 | ACPI_ROOT_OBJECT, |
1042 | ACPI_UINT32_MAX, | |
2263576c | 1043 | processor_walk_namespace_cb, NULL, &action, NULL); |
1da177e4 | 1044 | #endif |
729c6ba3 | 1045 | register_hotcpu_notifier(&acpi_cpu_notifier); |
1da177e4 LT |
1046 | } |
1047 | ||
1da177e4 LT |
1048 | static |
1049 | void acpi_processor_uninstall_hotplug_notify(void) | |
1050 | { | |
1051 | #ifdef CONFIG_ACPI_HOTPLUG_CPU | |
1052 | int action = UNINSTALL_NOTIFY_HANDLER; | |
1053 | acpi_walk_namespace(ACPI_TYPE_PROCESSOR, | |
4be44fcd LB |
1054 | ACPI_ROOT_OBJECT, |
1055 | ACPI_UINT32_MAX, | |
2263576c | 1056 | processor_walk_namespace_cb, NULL, &action, NULL); |
1da177e4 | 1057 | #endif |
729c6ba3 | 1058 | unregister_hotcpu_notifier(&acpi_cpu_notifier); |
1da177e4 LT |
1059 | } |
1060 | ||
1061 | /* | |
1062 | * We keep the driver loaded even when ACPI is not running. | |
1063 | * This is needed for the powernow-k8 driver, that works even without | |
1064 | * ACPI, but needs symbols from this driver | |
1065 | */ | |
1066 | ||
4be44fcd | 1067 | static int __init acpi_processor_init(void) |
1da177e4 | 1068 | { |
4be44fcd | 1069 | int result = 0; |
1da177e4 | 1070 | |
ce8442b5 YL |
1071 | if (acpi_disabled) |
1072 | return 0; | |
1073 | ||
1da177e4 LT |
1074 | memset(&errata, 0, sizeof(errata)); |
1075 | ||
f18c5a08 AS |
1076 | #ifdef CONFIG_SMP |
1077 | if (ACPI_FAILURE(acpi_get_table(ACPI_SIG_MADT, 0, | |
1078 | (struct acpi_table_header **)&madt))) | |
70c0846e | 1079 | madt = NULL; |
f18c5a08 | 1080 | #endif |
74cad4ee | 1081 | #ifdef CONFIG_ACPI_PROCFS |
1da177e4 LT |
1082 | acpi_processor_dir = proc_mkdir(ACPI_PROCESSOR_CLASS, acpi_root_dir); |
1083 | if (!acpi_processor_dir) | |
83822fc9 | 1084 | return -ENOMEM; |
74cad4ee | 1085 | #endif |
4f86d3a8 LB |
1086 | result = cpuidle_register_driver(&acpi_idle_driver); |
1087 | if (result < 0) | |
1088 | goto out_proc; | |
1089 | ||
1da177e4 | 1090 | result = acpi_bus_register_driver(&acpi_processor_driver); |
4f86d3a8 LB |
1091 | if (result < 0) |
1092 | goto out_cpuidle; | |
1da177e4 LT |
1093 | |
1094 | acpi_processor_install_hotplug_notify(); | |
1095 | ||
1096 | acpi_thermal_cpufreq_init(); | |
1097 | ||
1098 | acpi_processor_ppc_init(); | |
1099 | ||
1180509f ZY |
1100 | acpi_processor_throttling_init(); |
1101 | ||
d550d98d | 1102 | return 0; |
4f86d3a8 LB |
1103 | |
1104 | out_cpuidle: | |
1105 | cpuidle_unregister_driver(&acpi_idle_driver); | |
1106 | ||
1107 | out_proc: | |
74cad4ee | 1108 | #ifdef CONFIG_ACPI_PROCFS |
4f86d3a8 | 1109 | remove_proc_entry(ACPI_PROCESSOR_CLASS, acpi_root_dir); |
74cad4ee | 1110 | #endif |
4f86d3a8 LB |
1111 | |
1112 | return result; | |
1da177e4 LT |
1113 | } |
1114 | ||
4be44fcd | 1115 | static void __exit acpi_processor_exit(void) |
1da177e4 | 1116 | { |
ce8442b5 YL |
1117 | if (acpi_disabled) |
1118 | return; | |
1119 | ||
1da177e4 LT |
1120 | acpi_processor_ppc_exit(); |
1121 | ||
1122 | acpi_thermal_cpufreq_exit(); | |
1123 | ||
1124 | acpi_processor_uninstall_hotplug_notify(); | |
1125 | ||
1126 | acpi_bus_unregister_driver(&acpi_processor_driver); | |
1127 | ||
4f86d3a8 LB |
1128 | cpuidle_unregister_driver(&acpi_idle_driver); |
1129 | ||
74cad4ee | 1130 | #ifdef CONFIG_ACPI_PROCFS |
1da177e4 | 1131 | remove_proc_entry(ACPI_PROCESSOR_CLASS, acpi_root_dir); |
74cad4ee | 1132 | #endif |
1da177e4 | 1133 | |
d550d98d | 1134 | return; |
1da177e4 LT |
1135 | } |
1136 | ||
1da177e4 LT |
1137 | module_init(acpi_processor_init); |
1138 | module_exit(acpi_processor_exit); | |
1139 | ||
1140 | EXPORT_SYMBOL(acpi_processor_set_thermal_limit); | |
1141 | ||
1142 | MODULE_ALIAS("processor"); |