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 = { |
cf7acfab | 115 | .owner = THIS_MODULE, |
4be44fcd LB |
116 | .open = acpi_processor_info_open_fs, |
117 | .read = seq_read, | |
118 | .llseek = seq_lseek, | |
119 | .release = single_release, | |
1da177e4 LT |
120 | }; |
121 | ||
4be44fcd | 122 | struct acpi_processor *processors[NR_CPUS]; |
9f222718 | 123 | struct acpi_processor_errata errata __read_mostly; |
1da177e4 | 124 | |
1da177e4 LT |
125 | /* -------------------------------------------------------------------------- |
126 | Errata Handling | |
127 | -------------------------------------------------------------------------- */ | |
128 | ||
4be44fcd | 129 | static int acpi_processor_errata_piix4(struct pci_dev *dev) |
1da177e4 | 130 | { |
4be44fcd LB |
131 | u8 value1 = 0; |
132 | u8 value2 = 0; | |
1da177e4 | 133 | |
1da177e4 LT |
134 | |
135 | if (!dev) | |
d550d98d | 136 | return -EINVAL; |
1da177e4 LT |
137 | |
138 | /* | |
139 | * Note that 'dev' references the PIIX4 ACPI Controller. | |
140 | */ | |
141 | ||
44c10138 | 142 | switch (dev->revision) { |
1da177e4 LT |
143 | case 0: |
144 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found PIIX4 A-step\n")); | |
145 | break; | |
146 | case 1: | |
147 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found PIIX4 B-step\n")); | |
148 | break; | |
149 | case 2: | |
150 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found PIIX4E\n")); | |
151 | break; | |
152 | case 3: | |
153 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found PIIX4M\n")); | |
154 | break; | |
155 | default: | |
156 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found unknown PIIX4\n")); | |
157 | break; | |
158 | } | |
159 | ||
44c10138 | 160 | switch (dev->revision) { |
1da177e4 LT |
161 | |
162 | case 0: /* PIIX4 A-step */ | |
163 | case 1: /* PIIX4 B-step */ | |
164 | /* | |
165 | * See specification changes #13 ("Manual Throttle Duty Cycle") | |
166 | * and #14 ("Enabling and Disabling Manual Throttle"), plus | |
167 | * erratum #5 ("STPCLK# Deassertion Time") from the January | |
168 | * 2002 PIIX4 specification update. Applies to only older | |
169 | * PIIX4 models. | |
170 | */ | |
171 | errata.piix4.throttle = 1; | |
172 | ||
173 | case 2: /* PIIX4E */ | |
174 | case 3: /* PIIX4M */ | |
175 | /* | |
176 | * See erratum #18 ("C3 Power State/BMIDE and Type-F DMA | |
177 | * Livelock") from the January 2002 PIIX4 specification update. | |
178 | * Applies to all PIIX4 models. | |
179 | */ | |
180 | ||
181 | /* | |
182 | * BM-IDE | |
183 | * ------ | |
184 | * Find the PIIX4 IDE Controller and get the Bus Master IDE | |
185 | * Status register address. We'll use this later to read | |
186 | * each IDE controller's DMA status to make sure we catch all | |
187 | * DMA activity. | |
188 | */ | |
189 | dev = pci_get_subsys(PCI_VENDOR_ID_INTEL, | |
4be44fcd LB |
190 | PCI_DEVICE_ID_INTEL_82371AB, |
191 | PCI_ANY_ID, PCI_ANY_ID, NULL); | |
1da177e4 LT |
192 | if (dev) { |
193 | errata.piix4.bmisx = pci_resource_start(dev, 4); | |
194 | pci_dev_put(dev); | |
195 | } | |
196 | ||
197 | /* | |
198 | * Type-F DMA | |
199 | * ---------- | |
200 | * Find the PIIX4 ISA Controller and read the Motherboard | |
201 | * DMA controller's status to see if Type-F (Fast) DMA mode | |
202 | * is enabled (bit 7) on either channel. Note that we'll | |
203 | * disable C3 support if this is enabled, as some legacy | |
204 | * devices won't operate well if fast DMA is disabled. | |
205 | */ | |
206 | dev = pci_get_subsys(PCI_VENDOR_ID_INTEL, | |
4be44fcd LB |
207 | PCI_DEVICE_ID_INTEL_82371AB_0, |
208 | PCI_ANY_ID, PCI_ANY_ID, NULL); | |
1da177e4 LT |
209 | if (dev) { |
210 | pci_read_config_byte(dev, 0x76, &value1); | |
211 | pci_read_config_byte(dev, 0x77, &value2); | |
212 | if ((value1 & 0x80) || (value2 & 0x80)) | |
213 | errata.piix4.fdma = 1; | |
214 | pci_dev_put(dev); | |
215 | } | |
216 | ||
217 | break; | |
218 | } | |
219 | ||
220 | if (errata.piix4.bmisx) | |
221 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 222 | "Bus master activity detection (BM-IDE) erratum enabled\n")); |
1da177e4 LT |
223 | if (errata.piix4.fdma) |
224 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 225 | "Type-F DMA livelock erratum (C3 disabled)\n")); |
1da177e4 | 226 | |
d550d98d | 227 | return 0; |
1da177e4 LT |
228 | } |
229 | ||
8713cbef | 230 | static int acpi_processor_errata(struct acpi_processor *pr) |
1da177e4 | 231 | { |
4be44fcd LB |
232 | int result = 0; |
233 | struct pci_dev *dev = NULL; | |
1da177e4 | 234 | |
1da177e4 LT |
235 | |
236 | if (!pr) | |
d550d98d | 237 | return -EINVAL; |
1da177e4 LT |
238 | |
239 | /* | |
240 | * PIIX4 | |
241 | */ | |
242 | dev = pci_get_subsys(PCI_VENDOR_ID_INTEL, | |
4be44fcd LB |
243 | PCI_DEVICE_ID_INTEL_82371AB_3, PCI_ANY_ID, |
244 | PCI_ANY_ID, NULL); | |
1da177e4 LT |
245 | if (dev) { |
246 | result = acpi_processor_errata_piix4(dev); | |
247 | pci_dev_put(dev); | |
248 | } | |
249 | ||
d550d98d | 250 | return result; |
1da177e4 LT |
251 | } |
252 | ||
02df8b93 | 253 | /* -------------------------------------------------------------------------- |
0b28002f | 254 | Common ACPI processor functions |
02df8b93 VP |
255 | -------------------------------------------------------------------------- */ |
256 | ||
257 | /* | |
258 | * _PDC is required for a BIOS-OS handshake for most of the newer | |
259 | * ACPI processor features. | |
260 | */ | |
05131ecc | 261 | static int acpi_processor_set_pdc(struct acpi_processor *pr) |
02df8b93 | 262 | { |
05131ecc | 263 | struct acpi_object_list *pdc_in = pr->pdc; |
4be44fcd | 264 | acpi_status status = AE_OK; |
02df8b93 | 265 | |
02df8b93 | 266 | |
05131ecc | 267 | if (!pdc_in) |
d550d98d | 268 | return status; |
02df8b93 | 269 | |
05131ecc | 270 | status = acpi_evaluate_object(pr->handle, "_PDC", pdc_in, NULL); |
02df8b93 | 271 | |
05131ecc | 272 | if (ACPI_FAILURE(status)) |
4be44fcd | 273 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
05131ecc | 274 | "Could not evaluate _PDC, using legacy perf. control...\n")); |
02df8b93 | 275 | |
d550d98d | 276 | return status; |
02df8b93 VP |
277 | } |
278 | ||
1da177e4 LT |
279 | /* -------------------------------------------------------------------------- |
280 | FS Interface (/proc) | |
281 | -------------------------------------------------------------------------- */ | |
282 | ||
4be44fcd | 283 | static struct proc_dir_entry *acpi_processor_dir = NULL; |
1da177e4 LT |
284 | |
285 | static int acpi_processor_info_seq_show(struct seq_file *seq, void *offset) | |
286 | { | |
50dd0969 | 287 | struct acpi_processor *pr = seq->private; |
1da177e4 | 288 | |
1da177e4 LT |
289 | |
290 | if (!pr) | |
291 | goto end; | |
292 | ||
293 | seq_printf(seq, "processor id: %d\n" | |
4be44fcd LB |
294 | "acpi id: %d\n" |
295 | "bus mastering control: %s\n" | |
296 | "power management: %s\n" | |
297 | "throttling control: %s\n" | |
298 | "limit interface: %s\n", | |
299 | pr->id, | |
300 | pr->acpi_id, | |
301 | pr->flags.bm_control ? "yes" : "no", | |
302 | pr->flags.power ? "yes" : "no", | |
303 | pr->flags.throttling ? "yes" : "no", | |
304 | pr->flags.limit ? "yes" : "no"); | |
305 | ||
306 | end: | |
d550d98d | 307 | return 0; |
1da177e4 LT |
308 | } |
309 | ||
310 | static int acpi_processor_info_open_fs(struct inode *inode, struct file *file) | |
311 | { | |
312 | return single_open(file, acpi_processor_info_seq_show, | |
4be44fcd | 313 | PDE(inode)->data); |
1da177e4 LT |
314 | } |
315 | ||
4be44fcd | 316 | static int acpi_processor_add_fs(struct acpi_device *device) |
1da177e4 | 317 | { |
4be44fcd | 318 | struct proc_dir_entry *entry = NULL; |
1da177e4 | 319 | |
1da177e4 LT |
320 | |
321 | if (!acpi_device_dir(device)) { | |
322 | acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), | |
4be44fcd | 323 | acpi_processor_dir); |
1da177e4 | 324 | if (!acpi_device_dir(device)) |
d550d98d | 325 | return -ENODEV; |
1da177e4 LT |
326 | } |
327 | acpi_device_dir(device)->owner = THIS_MODULE; | |
328 | ||
329 | /* 'info' [R] */ | |
cf7acfab DL |
330 | entry = proc_create_data(ACPI_PROCESSOR_FILE_INFO, |
331 | S_IRUGO, acpi_device_dir(device), | |
332 | &acpi_processor_info_fops, | |
333 | acpi_driver_data(device)); | |
1da177e4 | 334 | if (!entry) |
d550d98d | 335 | return -EIO; |
1da177e4 LT |
336 | |
337 | /* 'throttling' [R/W] */ | |
cf7acfab DL |
338 | entry = proc_create_data(ACPI_PROCESSOR_FILE_THROTTLING, |
339 | S_IFREG | S_IRUGO | S_IWUSR, | |
340 | acpi_device_dir(device), | |
341 | &acpi_processor_throttling_fops, | |
342 | acpi_driver_data(device)); | |
1da177e4 | 343 | if (!entry) |
d550d98d | 344 | return -EIO; |
1da177e4 LT |
345 | |
346 | /* 'limit' [R/W] */ | |
cf7acfab DL |
347 | entry = proc_create_data(ACPI_PROCESSOR_FILE_LIMIT, |
348 | S_IFREG | S_IRUGO | S_IWUSR, | |
349 | acpi_device_dir(device), | |
350 | &acpi_processor_limit_fops, | |
351 | acpi_driver_data(device)); | |
1da177e4 | 352 | if (!entry) |
d550d98d | 353 | return -EIO; |
d550d98d | 354 | return 0; |
1da177e4 LT |
355 | } |
356 | ||
4be44fcd | 357 | static int acpi_processor_remove_fs(struct acpi_device *device) |
1da177e4 | 358 | { |
1da177e4 LT |
359 | |
360 | if (acpi_device_dir(device)) { | |
4be44fcd LB |
361 | remove_proc_entry(ACPI_PROCESSOR_FILE_INFO, |
362 | acpi_device_dir(device)); | |
1da177e4 | 363 | remove_proc_entry(ACPI_PROCESSOR_FILE_THROTTLING, |
4be44fcd LB |
364 | acpi_device_dir(device)); |
365 | remove_proc_entry(ACPI_PROCESSOR_FILE_LIMIT, | |
366 | acpi_device_dir(device)); | |
1da177e4 LT |
367 | remove_proc_entry(acpi_device_bid(device), acpi_processor_dir); |
368 | acpi_device_dir(device) = NULL; | |
369 | } | |
370 | ||
d550d98d | 371 | return 0; |
1da177e4 LT |
372 | } |
373 | ||
374 | /* Use the acpiid in MADT to map cpus in case of SMP */ | |
f18c5a08 | 375 | |
1da177e4 | 376 | #ifndef CONFIG_SMP |
11bf04c4 | 377 | static int get_cpu_id(acpi_handle handle, u32 acpi_id) {return -1;} |
1da177e4 LT |
378 | #else |
379 | ||
f18c5a08 AS |
380 | static struct acpi_table_madt *madt; |
381 | ||
382 | static int map_lapic_id(struct acpi_subtable_header *entry, | |
383 | u32 acpi_id, int *apic_id) | |
384 | { | |
385 | struct acpi_madt_local_apic *lapic = | |
386 | (struct acpi_madt_local_apic *)entry; | |
387 | if ((lapic->lapic_flags & ACPI_MADT_ENABLED) && | |
388 | lapic->processor_id == acpi_id) { | |
389 | *apic_id = lapic->id; | |
390 | return 1; | |
391 | } | |
392 | return 0; | |
393 | } | |
394 | ||
395 | static int map_lsapic_id(struct acpi_subtable_header *entry, | |
396 | u32 acpi_id, int *apic_id) | |
397 | { | |
398 | struct acpi_madt_local_sapic *lsapic = | |
399 | (struct acpi_madt_local_sapic *)entry; | |
400 | /* Only check enabled APICs*/ | |
401 | if (lsapic->lapic_flags & ACPI_MADT_ENABLED) { | |
402 | /* First check against id */ | |
403 | if (lsapic->processor_id == acpi_id) { | |
615d5f23 | 404 | *apic_id = (lsapic->id << 8) | lsapic->eid; |
f18c5a08 AS |
405 | return 1; |
406 | /* Check against optional uid */ | |
407 | } else if (entry->length >= 16 && | |
408 | lsapic->uid == acpi_id) { | |
409 | *apic_id = lsapic->uid; | |
410 | return 1; | |
411 | } | |
412 | } | |
413 | return 0; | |
414 | } | |
415 | ||
f18c5a08 AS |
416 | static int map_madt_entry(u32 acpi_id) |
417 | { | |
418 | unsigned long madt_end, entry; | |
419 | int apic_id = -1; | |
420 | ||
421 | if (!madt) | |
422 | return apic_id; | |
423 | ||
424 | entry = (unsigned long)madt; | |
425 | madt_end = entry + madt->header.length; | |
426 | ||
427 | /* Parse all entries looking for a match. */ | |
428 | ||
429 | entry += sizeof(struct acpi_table_madt); | |
430 | while (entry + sizeof(struct acpi_subtable_header) < madt_end) { | |
431 | struct acpi_subtable_header *header = | |
432 | (struct acpi_subtable_header *)entry; | |
433 | if (header->type == ACPI_MADT_TYPE_LOCAL_APIC) { | |
434 | if (map_lapic_id(header, acpi_id, &apic_id)) | |
435 | break; | |
436 | } else if (header->type == ACPI_MADT_TYPE_LOCAL_SAPIC) { | |
437 | if (map_lsapic_id(header, acpi_id, &apic_id)) | |
438 | break; | |
439 | } | |
440 | entry += header->length; | |
441 | } | |
442 | return apic_id; | |
443 | } | |
444 | ||
445 | static int map_mat_entry(acpi_handle handle, u32 acpi_id) | |
446 | { | |
447 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
448 | union acpi_object *obj; | |
449 | struct acpi_subtable_header *header; | |
450 | int apic_id = -1; | |
451 | ||
452 | if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer))) | |
453 | goto exit; | |
454 | ||
455 | if (!buffer.length || !buffer.pointer) | |
456 | goto exit; | |
457 | ||
458 | obj = buffer.pointer; | |
459 | if (obj->type != ACPI_TYPE_BUFFER || | |
460 | obj->buffer.length < sizeof(struct acpi_subtable_header)) { | |
461 | goto exit; | |
462 | } | |
463 | ||
464 | header = (struct acpi_subtable_header *)obj->buffer.pointer; | |
465 | if (header->type == ACPI_MADT_TYPE_LOCAL_APIC) { | |
466 | map_lapic_id(header, acpi_id, &apic_id); | |
467 | } else if (header->type == ACPI_MADT_TYPE_LOCAL_SAPIC) { | |
468 | map_lsapic_id(header, acpi_id, &apic_id); | |
469 | } | |
470 | ||
471 | exit: | |
472 | if (buffer.pointer) | |
473 | kfree(buffer.pointer); | |
474 | return apic_id; | |
475 | } | |
476 | ||
11bf04c4 | 477 | static int get_cpu_id(acpi_handle handle, u32 acpi_id) |
1da177e4 | 478 | { |
4a35a46b | 479 | int i; |
f18c5a08 | 480 | int apic_id = -1; |
1da177e4 | 481 | |
f18c5a08 AS |
482 | apic_id = map_mat_entry(handle, acpi_id); |
483 | if (apic_id == -1) | |
484 | apic_id = map_madt_entry(acpi_id); | |
485 | if (apic_id == -1) | |
486 | return apic_id; | |
1da177e4 | 487 | |
fbb43ab0 | 488 | for_each_possible_cpu(i) { |
71b31233 | 489 | if (cpu_physical_id(i) == apic_id) |
4a35a46b | 490 | return i; |
1da177e4 LT |
491 | } |
492 | return -1; | |
493 | } | |
494 | #endif | |
495 | ||
496 | /* -------------------------------------------------------------------------- | |
497 | Driver Interface | |
498 | -------------------------------------------------------------------------- */ | |
499 | ||
11bf04c4 | 500 | static int acpi_processor_get_info(struct acpi_processor *pr, unsigned has_uid) |
1da177e4 | 501 | { |
4be44fcd LB |
502 | acpi_status status = 0; |
503 | union acpi_object object = { 0 }; | |
504 | struct acpi_buffer buffer = { sizeof(union acpi_object), &object }; | |
df42baa0 | 505 | int cpu_index; |
4be44fcd | 506 | static int cpu0_initialized; |
1da177e4 | 507 | |
1da177e4 LT |
508 | |
509 | if (!pr) | |
d550d98d | 510 | return -EINVAL; |
1da177e4 LT |
511 | |
512 | if (num_online_cpus() > 1) | |
513 | errata.smp = TRUE; | |
514 | ||
515 | acpi_processor_errata(pr); | |
516 | ||
517 | /* | |
518 | * Check to see if we have bus mastering arbitration control. This | |
519 | * is required for proper C3 usage (to maintain cache coherency). | |
520 | */ | |
cee324b1 | 521 | if (acpi_gbl_FADT.pm2_control_block && acpi_gbl_FADT.pm2_control_length) { |
1da177e4 LT |
522 | pr->flags.bm_control = 1; |
523 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd LB |
524 | "Bus mastering arbitration control present\n")); |
525 | } else | |
1da177e4 | 526 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
4be44fcd | 527 | "No bus mastering arbitration control\n")); |
1da177e4 | 528 | |
11bf04c4 AS |
529 | /* Check if it is a Device with HID and UID */ |
530 | if (has_uid) { | |
531 | unsigned long value; | |
532 | status = acpi_evaluate_integer(pr->handle, METHOD_NAME__UID, | |
533 | NULL, &value); | |
534 | if (ACPI_FAILURE(status)) { | |
535 | printk(KERN_ERR PREFIX "Evaluating processor _UID\n"); | |
536 | return -ENODEV; | |
537 | } | |
538 | pr->acpi_id = value; | |
539 | } else { | |
540 | /* | |
541 | * Evalute the processor object. Note that it is common on SMP to | |
542 | * have the first (boot) processor with a valid PBLK address while | |
543 | * all others have a NULL address. | |
544 | */ | |
545 | status = acpi_evaluate_object(pr->handle, NULL, NULL, &buffer); | |
546 | if (ACPI_FAILURE(status)) { | |
547 | printk(KERN_ERR PREFIX "Evaluating processor object\n"); | |
548 | return -ENODEV; | |
549 | } | |
1da177e4 | 550 | |
11bf04c4 AS |
551 | /* |
552 | * TBD: Synch processor ID (via LAPIC/LSAPIC structures) on SMP. | |
553 | * >>> 'acpi_get_processor_id(acpi_id, &id)' in arch/xxx/acpi.c | |
554 | */ | |
555 | pr->acpi_id = object.processor.proc_id; | |
556 | } | |
557 | cpu_index = get_cpu_id(pr->handle, pr->acpi_id); | |
1da177e4 | 558 | |
4be44fcd | 559 | /* Handle UP system running SMP kernel, with no LAPIC in MADT */ |
df42baa0 | 560 | if (!cpu0_initialized && (cpu_index == -1) && |
4be44fcd LB |
561 | (num_online_cpus() == 1)) { |
562 | cpu_index = 0; | |
563 | } | |
564 | ||
565 | cpu0_initialized = 1; | |
566 | ||
567 | pr->id = cpu_index; | |
568 | ||
569 | /* | |
570 | * Extra Processor objects may be enumerated on MP systems with | |
571 | * less than the max # of CPUs. They should be ignored _iff | |
572 | * they are physically not present. | |
573 | */ | |
f18c5a08 | 574 | if (pr->id == -1) { |
4be44fcd LB |
575 | if (ACPI_FAILURE |
576 | (acpi_processor_hotadd_init(pr->handle, &pr->id))) { | |
d550d98d | 577 | return -ENODEV; |
4be44fcd LB |
578 | } |
579 | } | |
1da177e4 LT |
580 | |
581 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Processor [%d:%d]\n", pr->id, | |
4be44fcd | 582 | pr->acpi_id)); |
1da177e4 LT |
583 | |
584 | if (!object.processor.pblk_address) | |
585 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No PBLK (NULL address)\n")); | |
586 | else if (object.processor.pblk_length != 6) | |
6468463a LB |
587 | printk(KERN_ERR PREFIX "Invalid PBLK length [%d]\n", |
588 | object.processor.pblk_length); | |
1da177e4 LT |
589 | else { |
590 | pr->throttling.address = object.processor.pblk_address; | |
cee324b1 AS |
591 | pr->throttling.duty_offset = acpi_gbl_FADT.duty_offset; |
592 | pr->throttling.duty_width = acpi_gbl_FADT.duty_width; | |
1da177e4 LT |
593 | |
594 | pr->pblk = object.processor.pblk_address; | |
595 | ||
596 | /* | |
597 | * We don't care about error returns - we just try to mark | |
598 | * these reserved so that nobody else is confused into thinking | |
599 | * that this region might be unused.. | |
600 | * | |
601 | * (In particular, allocating the IO range for Cardbus) | |
602 | */ | |
603 | request_region(pr->throttling.address, 6, "ACPI CPU throttle"); | |
604 | } | |
605 | ||
d550d98d | 606 | return 0; |
1da177e4 LT |
607 | } |
608 | ||
cd8e2b48 VP |
609 | static void *processor_device_array[NR_CPUS]; |
610 | ||
7af8b660 | 611 | static int __cpuinit acpi_processor_start(struct acpi_device *device) |
1da177e4 | 612 | { |
4be44fcd LB |
613 | int result = 0; |
614 | acpi_status status = AE_OK; | |
615 | struct acpi_processor *pr; | |
1da177e4 | 616 | |
1da177e4 LT |
617 | |
618 | pr = acpi_driver_data(device); | |
619 | ||
11bf04c4 | 620 | result = acpi_processor_get_info(pr, device->flags.unique_id); |
1da177e4 LT |
621 | if (result) { |
622 | /* Processor is physically not present */ | |
d550d98d | 623 | return 0; |
1da177e4 LT |
624 | } |
625 | ||
fbb43ab0 | 626 | BUG_ON((pr->id >= nr_cpu_ids) || (pr->id < 0)); |
1da177e4 | 627 | |
cd8e2b48 VP |
628 | /* |
629 | * Buggy BIOS check | |
630 | * ACPI id of processors can be reported wrongly by the BIOS. | |
631 | * Don't trust it blindly | |
632 | */ | |
633 | if (processor_device_array[pr->id] != NULL && | |
50dd0969 | 634 | processor_device_array[pr->id] != device) { |
4fdb2a05 | 635 | printk(KERN_WARNING "BIOS reported wrong ACPI id " |
0eacee58 | 636 | "for the processor\n"); |
d550d98d | 637 | return -ENODEV; |
cd8e2b48 | 638 | } |
50dd0969 | 639 | processor_device_array[pr->id] = device; |
cd8e2b48 | 640 | |
1da177e4 LT |
641 | processors[pr->id] = pr; |
642 | ||
643 | result = acpi_processor_add_fs(device); | |
644 | if (result) | |
645 | goto end; | |
646 | ||
647 | status = acpi_install_notify_handler(pr->handle, ACPI_DEVICE_NOTIFY, | |
4be44fcd | 648 | acpi_processor_notify, pr); |
1da177e4 | 649 | |
05131ecc VP |
650 | /* _PDC call should be done before doing anything else (if reqd.). */ |
651 | arch_acpi_processor_init_pdc(pr); | |
652 | acpi_processor_set_pdc(pr); | |
0ac3c571 ZY |
653 | #ifdef CONFIG_CPU_FREQ |
654 | acpi_processor_ppc_has_changed(pr); | |
655 | #endif | |
656 | acpi_processor_get_throttling_info(pr); | |
657 | acpi_processor_get_limit_info(pr); | |
658 | ||
05131ecc | 659 | |
1da177e4 LT |
660 | acpi_processor_power_init(pr, device); |
661 | ||
d9460fd2 ZR |
662 | pr->cdev = thermal_cooling_device_register("Processor", device, |
663 | &processor_cooling_ops); | |
d76628c6 TS |
664 | if (IS_ERR(pr->cdev)) { |
665 | result = PTR_ERR(pr->cdev); | |
666 | goto end; | |
667 | } | |
48d3d826 IM |
668 | if (pr->cdev) { |
669 | printk(KERN_INFO PREFIX | |
670 | "%s is registered as cooling_device%d\n", | |
671 | device->dev.bus_id, pr->cdev->id); | |
672 | ||
673 | result = sysfs_create_link(&device->dev.kobj, | |
674 | &pr->cdev->device.kobj, | |
675 | "thermal_cooling"); | |
676 | if (result) | |
677 | return result; | |
678 | result = sysfs_create_link(&pr->cdev->device.kobj, | |
679 | &device->dev.kobj, | |
680 | "device"); | |
681 | if (result) | |
682 | return result; | |
683 | } | |
d9460fd2 | 684 | |
1da177e4 LT |
685 | if (pr->flags.throttling) { |
686 | printk(KERN_INFO PREFIX "%s [%s] (supports", | |
4be44fcd | 687 | acpi_device_name(device), acpi_device_bid(device)); |
1da177e4 LT |
688 | printk(" %d throttling states", pr->throttling.state_count); |
689 | printk(")\n"); | |
690 | } | |
691 | ||
4be44fcd | 692 | end: |
1da177e4 | 693 | |
d550d98d | 694 | return result; |
1da177e4 LT |
695 | } |
696 | ||
4be44fcd | 697 | static void acpi_processor_notify(acpi_handle handle, u32 event, void *data) |
1da177e4 | 698 | { |
50dd0969 | 699 | struct acpi_processor *pr = data; |
4be44fcd | 700 | struct acpi_device *device = NULL; |
e790cc8b | 701 | int saved; |
1da177e4 LT |
702 | |
703 | if (!pr) | |
d550d98d | 704 | return; |
1da177e4 LT |
705 | |
706 | if (acpi_bus_get_device(pr->handle, &device)) | |
d550d98d | 707 | return; |
1da177e4 LT |
708 | |
709 | switch (event) { | |
710 | case ACPI_PROCESSOR_NOTIFY_PERFORMANCE: | |
e790cc8b | 711 | saved = pr->performance_platform_limit; |
1da177e4 | 712 | acpi_processor_ppc_has_changed(pr); |
e790cc8b AS |
713 | if (saved == pr->performance_platform_limit) |
714 | break; | |
14e04fb3 | 715 | acpi_bus_generate_proc_event(device, event, |
4be44fcd | 716 | pr->performance_platform_limit); |
962ce8ca ZR |
717 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
718 | device->dev.bus_id, event, | |
719 | pr->performance_platform_limit); | |
1da177e4 LT |
720 | break; |
721 | case ACPI_PROCESSOR_NOTIFY_POWER: | |
722 | acpi_processor_cst_has_changed(pr); | |
14e04fb3 | 723 | acpi_bus_generate_proc_event(device, event, 0); |
962ce8ca ZR |
724 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
725 | device->dev.bus_id, event, 0); | |
1da177e4 | 726 | break; |
01854e69 LY |
727 | case ACPI_PROCESSOR_NOTIFY_THROTTLING: |
728 | acpi_processor_tstate_has_changed(pr); | |
14e04fb3 | 729 | acpi_bus_generate_proc_event(device, event, 0); |
962ce8ca ZR |
730 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
731 | device->dev.bus_id, event, 0); | |
1da177e4 LT |
732 | default: |
733 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 734 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
735 | break; |
736 | } | |
737 | ||
d550d98d | 738 | return; |
1da177e4 LT |
739 | } |
740 | ||
729c6ba3 VP |
741 | static int acpi_cpu_soft_notify(struct notifier_block *nfb, |
742 | unsigned long action, void *hcpu) | |
743 | { | |
744 | unsigned int cpu = (unsigned long)hcpu; | |
745 | struct acpi_processor *pr = processors[cpu]; | |
746 | ||
747 | if (action == CPU_ONLINE && pr) { | |
748 | acpi_processor_ppc_has_changed(pr); | |
749 | acpi_processor_cst_has_changed(pr); | |
750 | acpi_processor_tstate_has_changed(pr); | |
751 | } | |
752 | return NOTIFY_OK; | |
753 | } | |
754 | ||
755 | static struct notifier_block acpi_cpu_notifier = | |
756 | { | |
757 | .notifier_call = acpi_cpu_soft_notify, | |
758 | }; | |
759 | ||
4be44fcd | 760 | static int acpi_processor_add(struct acpi_device *device) |
1da177e4 | 761 | { |
4be44fcd | 762 | struct acpi_processor *pr = NULL; |
1da177e4 | 763 | |
1da177e4 LT |
764 | |
765 | if (!device) | |
d550d98d | 766 | return -EINVAL; |
1da177e4 | 767 | |
36bcbec7 | 768 | pr = kzalloc(sizeof(struct acpi_processor), GFP_KERNEL); |
1da177e4 | 769 | if (!pr) |
d550d98d | 770 | return -ENOMEM; |
1da177e4 LT |
771 | |
772 | pr->handle = device->handle; | |
773 | strcpy(acpi_device_name(device), ACPI_PROCESSOR_DEVICE_NAME); | |
774 | strcpy(acpi_device_class(device), ACPI_PROCESSOR_CLASS); | |
775 | acpi_driver_data(device) = pr; | |
776 | ||
d550d98d | 777 | return 0; |
1da177e4 LT |
778 | } |
779 | ||
4be44fcd | 780 | static int acpi_processor_remove(struct acpi_device *device, int type) |
1da177e4 | 781 | { |
4be44fcd LB |
782 | acpi_status status = AE_OK; |
783 | struct acpi_processor *pr = NULL; | |
1da177e4 | 784 | |
1da177e4 LT |
785 | |
786 | if (!device || !acpi_driver_data(device)) | |
d550d98d | 787 | return -EINVAL; |
1da177e4 | 788 | |
50dd0969 | 789 | pr = acpi_driver_data(device); |
1da177e4 | 790 | |
fbb43ab0 | 791 | if (pr->id >= nr_cpu_ids) { |
1da177e4 | 792 | kfree(pr); |
d550d98d | 793 | return 0; |
1da177e4 LT |
794 | } |
795 | ||
796 | if (type == ACPI_BUS_REMOVAL_EJECT) { | |
797 | if (acpi_processor_handle_eject(pr)) | |
d550d98d | 798 | return -EINVAL; |
1da177e4 LT |
799 | } |
800 | ||
801 | acpi_processor_power_exit(pr, device); | |
802 | ||
803 | status = acpi_remove_notify_handler(pr->handle, ACPI_DEVICE_NOTIFY, | |
4be44fcd | 804 | acpi_processor_notify); |
1da177e4 LT |
805 | |
806 | acpi_processor_remove_fs(device); | |
807 | ||
f28bb45e ZY |
808 | if (pr->cdev) { |
809 | sysfs_remove_link(&device->dev.kobj, "thermal_cooling"); | |
810 | sysfs_remove_link(&pr->cdev->device.kobj, "device"); | |
811 | thermal_cooling_device_unregister(pr->cdev); | |
812 | pr->cdev = NULL; | |
813 | } | |
d9460fd2 | 814 | |
1da177e4 | 815 | processors[pr->id] = NULL; |
ba62b077 | 816 | processor_device_array[pr->id] = NULL; |
1da177e4 LT |
817 | kfree(pr); |
818 | ||
d550d98d | 819 | return 0; |
1da177e4 LT |
820 | } |
821 | ||
822 | #ifdef CONFIG_ACPI_HOTPLUG_CPU | |
823 | /**************************************************************************** | |
824 | * Acpi processor hotplug support * | |
825 | ****************************************************************************/ | |
826 | ||
4be44fcd | 827 | static int is_processor_present(acpi_handle handle) |
1da177e4 | 828 | { |
4be44fcd LB |
829 | acpi_status status; |
830 | unsigned long sta = 0; | |
1da177e4 | 831 | |
1da177e4 LT |
832 | |
833 | status = acpi_evaluate_integer(handle, "_STA", NULL, &sta); | |
cfaf3747 ZR |
834 | |
835 | if (ACPI_SUCCESS(status) && (sta & ACPI_STA_DEVICE_PRESENT)) | |
836 | return 1; | |
837 | ||
d0ce46f5 ZR |
838 | /* |
839 | * _STA is mandatory for a processor that supports hot plug | |
840 | */ | |
841 | if (status == AE_NOT_FOUND) | |
842 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
843 | "Processor does not support hot plug\n")); | |
844 | else | |
845 | ACPI_EXCEPTION((AE_INFO, status, | |
846 | "Processor Device is not present")); | |
cfaf3747 | 847 | return 0; |
1da177e4 LT |
848 | } |
849 | ||
1da177e4 | 850 | static |
4be44fcd | 851 | int acpi_processor_device_add(acpi_handle handle, struct acpi_device **device) |
1da177e4 | 852 | { |
4be44fcd LB |
853 | acpi_handle phandle; |
854 | struct acpi_device *pdev; | |
855 | struct acpi_processor *pr; | |
1da177e4 | 856 | |
1da177e4 LT |
857 | |
858 | if (acpi_get_parent(handle, &phandle)) { | |
d550d98d | 859 | return -ENODEV; |
1da177e4 LT |
860 | } |
861 | ||
862 | if (acpi_bus_get_device(phandle, &pdev)) { | |
d550d98d | 863 | return -ENODEV; |
1da177e4 LT |
864 | } |
865 | ||
866 | if (acpi_bus_add(device, pdev, handle, ACPI_BUS_TYPE_PROCESSOR)) { | |
d550d98d | 867 | return -ENODEV; |
1da177e4 LT |
868 | } |
869 | ||
3fb02738 | 870 | acpi_bus_start(*device); |
1da177e4 LT |
871 | |
872 | pr = acpi_driver_data(*device); | |
873 | if (!pr) | |
d550d98d | 874 | return -ENODEV; |
1da177e4 | 875 | |
fbb43ab0 | 876 | if ((pr->id >= 0) && (pr->id < nr_cpu_ids)) { |
f883d9db | 877 | kobject_uevent(&(*device)->dev.kobj, KOBJ_ONLINE); |
1da177e4 | 878 | } |
d550d98d | 879 | return 0; |
1da177e4 LT |
880 | } |
881 | ||
b95e9e8d SR |
882 | static void __ref acpi_processor_hotplug_notify(acpi_handle handle, |
883 | u32 event, void *data) | |
1da177e4 | 884 | { |
4be44fcd LB |
885 | struct acpi_processor *pr; |
886 | struct acpi_device *device = NULL; | |
1da177e4 LT |
887 | int result; |
888 | ||
1da177e4 LT |
889 | |
890 | switch (event) { | |
891 | case ACPI_NOTIFY_BUS_CHECK: | |
892 | case ACPI_NOTIFY_DEVICE_CHECK: | |
d6f882e1 GC |
893 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
894 | "Processor driver received %s event\n", | |
4be44fcd | 895 | (event == ACPI_NOTIFY_BUS_CHECK) ? |
d6f882e1 | 896 | "ACPI_NOTIFY_BUS_CHECK" : "ACPI_NOTIFY_DEVICE_CHECK")); |
1da177e4 LT |
897 | |
898 | if (!is_processor_present(handle)) | |
899 | break; | |
900 | ||
901 | if (acpi_bus_get_device(handle, &device)) { | |
902 | result = acpi_processor_device_add(handle, &device); | |
903 | if (result) | |
6468463a LB |
904 | printk(KERN_ERR PREFIX |
905 | "Unable to add the device\n"); | |
1da177e4 LT |
906 | break; |
907 | } | |
908 | ||
909 | pr = acpi_driver_data(device); | |
910 | if (!pr) { | |
6468463a | 911 | printk(KERN_ERR PREFIX "Driver data is NULL\n"); |
1da177e4 LT |
912 | break; |
913 | } | |
914 | ||
fbb43ab0 | 915 | if (pr->id >= 0 && (pr->id < nr_cpu_ids)) { |
f883d9db | 916 | kobject_uevent(&device->dev.kobj, KOBJ_OFFLINE); |
1da177e4 LT |
917 | break; |
918 | } | |
919 | ||
920 | result = acpi_processor_start(device); | |
fbb43ab0 | 921 | if ((!result) && ((pr->id >= 0) && (pr->id < nr_cpu_ids))) { |
f883d9db | 922 | kobject_uevent(&device->dev.kobj, KOBJ_ONLINE); |
1da177e4 | 923 | } else { |
6468463a LB |
924 | printk(KERN_ERR PREFIX "Device [%s] failed to start\n", |
925 | acpi_device_bid(device)); | |
1da177e4 | 926 | } |
4be44fcd | 927 | break; |
1da177e4 | 928 | case ACPI_NOTIFY_EJECT_REQUEST: |
4be44fcd LB |
929 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
930 | "received ACPI_NOTIFY_EJECT_REQUEST\n")); | |
1da177e4 LT |
931 | |
932 | if (acpi_bus_get_device(handle, &device)) { | |
6468463a LB |
933 | printk(KERN_ERR PREFIX |
934 | "Device don't exist, dropping EJECT\n"); | |
1da177e4 LT |
935 | break; |
936 | } | |
937 | pr = acpi_driver_data(device); | |
938 | if (!pr) { | |
6468463a LB |
939 | printk(KERN_ERR PREFIX |
940 | "Driver data is NULL, dropping EJECT\n"); | |
d550d98d | 941 | return; |
1da177e4 LT |
942 | } |
943 | ||
fbb43ab0 | 944 | if ((pr->id < nr_cpu_ids) && (cpu_present(pr->id))) |
f883d9db | 945 | kobject_uevent(&device->dev.kobj, KOBJ_OFFLINE); |
1da177e4 LT |
946 | break; |
947 | default: | |
948 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 949 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
950 | break; |
951 | } | |
952 | ||
d550d98d | 953 | return; |
1da177e4 LT |
954 | } |
955 | ||
956 | static acpi_status | |
957 | processor_walk_namespace_cb(acpi_handle handle, | |
4be44fcd | 958 | u32 lvl, void *context, void **rv) |
1da177e4 | 959 | { |
4be44fcd | 960 | acpi_status status; |
1da177e4 | 961 | int *action = context; |
4be44fcd | 962 | acpi_object_type type = 0; |
1da177e4 LT |
963 | |
964 | status = acpi_get_type(handle, &type); | |
965 | if (ACPI_FAILURE(status)) | |
4be44fcd | 966 | return (AE_OK); |
1da177e4 LT |
967 | |
968 | if (type != ACPI_TYPE_PROCESSOR) | |
4be44fcd | 969 | return (AE_OK); |
1da177e4 | 970 | |
4be44fcd | 971 | switch (*action) { |
1da177e4 LT |
972 | case INSTALL_NOTIFY_HANDLER: |
973 | acpi_install_notify_handler(handle, | |
4be44fcd LB |
974 | ACPI_SYSTEM_NOTIFY, |
975 | acpi_processor_hotplug_notify, | |
976 | NULL); | |
1da177e4 LT |
977 | break; |
978 | case UNINSTALL_NOTIFY_HANDLER: | |
979 | acpi_remove_notify_handler(handle, | |
4be44fcd LB |
980 | ACPI_SYSTEM_NOTIFY, |
981 | acpi_processor_hotplug_notify); | |
1da177e4 LT |
982 | break; |
983 | default: | |
984 | break; | |
985 | } | |
986 | ||
4be44fcd | 987 | return (AE_OK); |
1da177e4 LT |
988 | } |
989 | ||
4be44fcd | 990 | static acpi_status acpi_processor_hotadd_init(acpi_handle handle, int *p_cpu) |
1da177e4 | 991 | { |
1da177e4 LT |
992 | |
993 | if (!is_processor_present(handle)) { | |
d550d98d | 994 | return AE_ERROR; |
1da177e4 LT |
995 | } |
996 | ||
997 | if (acpi_map_lsapic(handle, p_cpu)) | |
d550d98d | 998 | return AE_ERROR; |
1da177e4 LT |
999 | |
1000 | if (arch_register_cpu(*p_cpu)) { | |
1001 | acpi_unmap_lsapic(*p_cpu); | |
d550d98d | 1002 | return AE_ERROR; |
1da177e4 LT |
1003 | } |
1004 | ||
d550d98d | 1005 | return AE_OK; |
1da177e4 LT |
1006 | } |
1007 | ||
4be44fcd | 1008 | static int acpi_processor_handle_eject(struct acpi_processor *pr) |
1da177e4 LT |
1009 | { |
1010 | if (cpu_online(pr->id)) { | |
4be44fcd | 1011 | return (-EINVAL); |
1da177e4 LT |
1012 | } |
1013 | arch_unregister_cpu(pr->id); | |
1014 | acpi_unmap_lsapic(pr->id); | |
4be44fcd | 1015 | return (0); |
1da177e4 LT |
1016 | } |
1017 | #else | |
4be44fcd | 1018 | static acpi_status acpi_processor_hotadd_init(acpi_handle handle, int *p_cpu) |
1da177e4 LT |
1019 | { |
1020 | return AE_ERROR; | |
1021 | } | |
4be44fcd | 1022 | static int acpi_processor_handle_eject(struct acpi_processor *pr) |
1da177e4 | 1023 | { |
4be44fcd | 1024 | return (-EINVAL); |
1da177e4 LT |
1025 | } |
1026 | #endif | |
1027 | ||
1da177e4 LT |
1028 | static |
1029 | void acpi_processor_install_hotplug_notify(void) | |
1030 | { | |
1031 | #ifdef CONFIG_ACPI_HOTPLUG_CPU | |
1032 | int action = INSTALL_NOTIFY_HANDLER; | |
1033 | acpi_walk_namespace(ACPI_TYPE_PROCESSOR, | |
4be44fcd LB |
1034 | ACPI_ROOT_OBJECT, |
1035 | ACPI_UINT32_MAX, | |
1036 | processor_walk_namespace_cb, &action, NULL); | |
1da177e4 | 1037 | #endif |
729c6ba3 | 1038 | register_hotcpu_notifier(&acpi_cpu_notifier); |
1da177e4 LT |
1039 | } |
1040 | ||
1da177e4 LT |
1041 | static |
1042 | void acpi_processor_uninstall_hotplug_notify(void) | |
1043 | { | |
1044 | #ifdef CONFIG_ACPI_HOTPLUG_CPU | |
1045 | int action = UNINSTALL_NOTIFY_HANDLER; | |
1046 | acpi_walk_namespace(ACPI_TYPE_PROCESSOR, | |
4be44fcd LB |
1047 | ACPI_ROOT_OBJECT, |
1048 | ACPI_UINT32_MAX, | |
1049 | processor_walk_namespace_cb, &action, NULL); | |
1da177e4 | 1050 | #endif |
729c6ba3 | 1051 | unregister_hotcpu_notifier(&acpi_cpu_notifier); |
1da177e4 LT |
1052 | } |
1053 | ||
1054 | /* | |
1055 | * We keep the driver loaded even when ACPI is not running. | |
1056 | * This is needed for the powernow-k8 driver, that works even without | |
1057 | * ACPI, but needs symbols from this driver | |
1058 | */ | |
1059 | ||
4be44fcd | 1060 | static int __init acpi_processor_init(void) |
1da177e4 | 1061 | { |
4be44fcd | 1062 | int result = 0; |
1da177e4 | 1063 | |
1da177e4 LT |
1064 | |
1065 | memset(&processors, 0, sizeof(processors)); | |
1066 | memset(&errata, 0, sizeof(errata)); | |
1067 | ||
f18c5a08 AS |
1068 | #ifdef CONFIG_SMP |
1069 | if (ACPI_FAILURE(acpi_get_table(ACPI_SIG_MADT, 0, | |
1070 | (struct acpi_table_header **)&madt))) | |
70c0846e | 1071 | madt = NULL; |
f18c5a08 AS |
1072 | #endif |
1073 | ||
1da177e4 LT |
1074 | acpi_processor_dir = proc_mkdir(ACPI_PROCESSOR_CLASS, acpi_root_dir); |
1075 | if (!acpi_processor_dir) | |
83822fc9 | 1076 | return -ENOMEM; |
1da177e4 LT |
1077 | acpi_processor_dir->owner = THIS_MODULE; |
1078 | ||
4f86d3a8 LB |
1079 | result = cpuidle_register_driver(&acpi_idle_driver); |
1080 | if (result < 0) | |
1081 | goto out_proc; | |
1082 | ||
1da177e4 | 1083 | result = acpi_bus_register_driver(&acpi_processor_driver); |
4f86d3a8 LB |
1084 | if (result < 0) |
1085 | goto out_cpuidle; | |
1da177e4 LT |
1086 | |
1087 | acpi_processor_install_hotplug_notify(); | |
1088 | ||
1089 | acpi_thermal_cpufreq_init(); | |
1090 | ||
1091 | acpi_processor_ppc_init(); | |
1092 | ||
1180509f ZY |
1093 | acpi_processor_throttling_init(); |
1094 | ||
d550d98d | 1095 | return 0; |
4f86d3a8 LB |
1096 | |
1097 | out_cpuidle: | |
1098 | cpuidle_unregister_driver(&acpi_idle_driver); | |
1099 | ||
1100 | out_proc: | |
1101 | remove_proc_entry(ACPI_PROCESSOR_CLASS, acpi_root_dir); | |
1102 | ||
1103 | return result; | |
1da177e4 LT |
1104 | } |
1105 | ||
4be44fcd | 1106 | static void __exit acpi_processor_exit(void) |
1da177e4 | 1107 | { |
1da177e4 LT |
1108 | acpi_processor_ppc_exit(); |
1109 | ||
1110 | acpi_thermal_cpufreq_exit(); | |
1111 | ||
1112 | acpi_processor_uninstall_hotplug_notify(); | |
1113 | ||
1114 | acpi_bus_unregister_driver(&acpi_processor_driver); | |
1115 | ||
4f86d3a8 LB |
1116 | cpuidle_unregister_driver(&acpi_idle_driver); |
1117 | ||
1da177e4 LT |
1118 | remove_proc_entry(ACPI_PROCESSOR_CLASS, acpi_root_dir); |
1119 | ||
d550d98d | 1120 | return; |
1da177e4 LT |
1121 | } |
1122 | ||
1da177e4 LT |
1123 | module_init(acpi_processor_init); |
1124 | module_exit(acpi_processor_exit); | |
1125 | ||
1126 | EXPORT_SYMBOL(acpi_processor_set_thermal_limit); | |
1127 | ||
1128 | MODULE_ALIAS("processor"); |