Commit | Line | Data |
---|---|---|
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 | 89 | |
1da177e4 | 90 | |
1ba90e3a TR |
91 | static const struct acpi_device_id processor_device_ids[] = { |
92 | {ACPI_PROCESSOR_HID, 0}, | |
93 | {"", 0}, | |
94 | }; | |
95 | MODULE_DEVICE_TABLE(acpi, processor_device_ids); | |
96 | ||
1da177e4 | 97 | static struct acpi_driver acpi_processor_driver = { |
c2b6705b | 98 | .name = "processor", |
4be44fcd | 99 | .class = ACPI_PROCESSOR_CLASS, |
1ba90e3a | 100 | .ids = processor_device_ids, |
4be44fcd LB |
101 | .ops = { |
102 | .add = acpi_processor_add, | |
103 | .remove = acpi_processor_remove, | |
104 | .start = acpi_processor_start, | |
b04e7bdb TG |
105 | .suspend = acpi_processor_suspend, |
106 | .resume = acpi_processor_resume, | |
4be44fcd | 107 | }, |
1da177e4 LT |
108 | }; |
109 | ||
110 | #define INSTALL_NOTIFY_HANDLER 1 | |
111 | #define UNINSTALL_NOTIFY_HANDLER 2 | |
112 | ||
d7508032 | 113 | static const struct file_operations acpi_processor_info_fops = { |
cf7acfab | 114 | .owner = THIS_MODULE, |
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 | ||
706546d0 | 121 | DEFINE_PER_CPU(struct acpi_processor *, processors); |
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; |
da5e09a1 ZY |
268 | if (idle_nomwait) { |
269 | /* | |
270 | * If mwait is disabled for CPU C-states, the C2C3_FFH access | |
271 | * mode will be disabled in the parameter of _PDC object. | |
272 | * Of course C1_FFH access mode will also be disabled. | |
273 | */ | |
274 | union acpi_object *obj; | |
275 | u32 *buffer = NULL; | |
02df8b93 | 276 | |
da5e09a1 ZY |
277 | obj = pdc_in->pointer; |
278 | buffer = (u32 *)(obj->buffer.pointer); | |
279 | buffer[2] &= ~(ACPI_PDC_C_C2C3_FFH | ACPI_PDC_C_C1_FFH); | |
280 | ||
281 | } | |
05131ecc | 282 | status = acpi_evaluate_object(pr->handle, "_PDC", pdc_in, NULL); |
02df8b93 | 283 | |
05131ecc | 284 | if (ACPI_FAILURE(status)) |
4be44fcd | 285 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
05131ecc | 286 | "Could not evaluate _PDC, using legacy perf. control...\n")); |
02df8b93 | 287 | |
d550d98d | 288 | return status; |
02df8b93 VP |
289 | } |
290 | ||
1da177e4 LT |
291 | /* -------------------------------------------------------------------------- |
292 | FS Interface (/proc) | |
293 | -------------------------------------------------------------------------- */ | |
294 | ||
4be44fcd | 295 | static struct proc_dir_entry *acpi_processor_dir = NULL; |
1da177e4 LT |
296 | |
297 | static int acpi_processor_info_seq_show(struct seq_file *seq, void *offset) | |
298 | { | |
50dd0969 | 299 | struct acpi_processor *pr = seq->private; |
1da177e4 | 300 | |
1da177e4 LT |
301 | |
302 | if (!pr) | |
303 | goto end; | |
304 | ||
305 | seq_printf(seq, "processor id: %d\n" | |
4be44fcd LB |
306 | "acpi id: %d\n" |
307 | "bus mastering control: %s\n" | |
308 | "power management: %s\n" | |
309 | "throttling control: %s\n" | |
310 | "limit interface: %s\n", | |
311 | pr->id, | |
312 | pr->acpi_id, | |
313 | pr->flags.bm_control ? "yes" : "no", | |
314 | pr->flags.power ? "yes" : "no", | |
315 | pr->flags.throttling ? "yes" : "no", | |
316 | pr->flags.limit ? "yes" : "no"); | |
317 | ||
318 | end: | |
d550d98d | 319 | return 0; |
1da177e4 LT |
320 | } |
321 | ||
322 | static int acpi_processor_info_open_fs(struct inode *inode, struct file *file) | |
323 | { | |
324 | return single_open(file, acpi_processor_info_seq_show, | |
4be44fcd | 325 | PDE(inode)->data); |
1da177e4 LT |
326 | } |
327 | ||
4be44fcd | 328 | static int acpi_processor_add_fs(struct acpi_device *device) |
1da177e4 | 329 | { |
4be44fcd | 330 | struct proc_dir_entry *entry = NULL; |
1da177e4 | 331 | |
1da177e4 LT |
332 | |
333 | if (!acpi_device_dir(device)) { | |
334 | acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), | |
4be44fcd | 335 | acpi_processor_dir); |
1da177e4 | 336 | if (!acpi_device_dir(device)) |
d550d98d | 337 | return -ENODEV; |
1da177e4 LT |
338 | } |
339 | acpi_device_dir(device)->owner = THIS_MODULE; | |
340 | ||
341 | /* 'info' [R] */ | |
cf7acfab DL |
342 | entry = proc_create_data(ACPI_PROCESSOR_FILE_INFO, |
343 | S_IRUGO, acpi_device_dir(device), | |
344 | &acpi_processor_info_fops, | |
345 | acpi_driver_data(device)); | |
1da177e4 | 346 | if (!entry) |
d550d98d | 347 | return -EIO; |
1da177e4 LT |
348 | |
349 | /* 'throttling' [R/W] */ | |
cf7acfab DL |
350 | entry = proc_create_data(ACPI_PROCESSOR_FILE_THROTTLING, |
351 | S_IFREG | S_IRUGO | S_IWUSR, | |
352 | acpi_device_dir(device), | |
353 | &acpi_processor_throttling_fops, | |
354 | acpi_driver_data(device)); | |
1da177e4 | 355 | if (!entry) |
d550d98d | 356 | return -EIO; |
1da177e4 LT |
357 | |
358 | /* 'limit' [R/W] */ | |
cf7acfab DL |
359 | entry = proc_create_data(ACPI_PROCESSOR_FILE_LIMIT, |
360 | S_IFREG | S_IRUGO | S_IWUSR, | |
361 | acpi_device_dir(device), | |
362 | &acpi_processor_limit_fops, | |
363 | acpi_driver_data(device)); | |
1da177e4 | 364 | if (!entry) |
d550d98d | 365 | return -EIO; |
d550d98d | 366 | return 0; |
1da177e4 LT |
367 | } |
368 | ||
4be44fcd | 369 | static int acpi_processor_remove_fs(struct acpi_device *device) |
1da177e4 | 370 | { |
1da177e4 LT |
371 | |
372 | if (acpi_device_dir(device)) { | |
4be44fcd LB |
373 | remove_proc_entry(ACPI_PROCESSOR_FILE_INFO, |
374 | acpi_device_dir(device)); | |
1da177e4 | 375 | remove_proc_entry(ACPI_PROCESSOR_FILE_THROTTLING, |
4be44fcd LB |
376 | acpi_device_dir(device)); |
377 | remove_proc_entry(ACPI_PROCESSOR_FILE_LIMIT, | |
378 | acpi_device_dir(device)); | |
1da177e4 LT |
379 | remove_proc_entry(acpi_device_bid(device), acpi_processor_dir); |
380 | acpi_device_dir(device) = NULL; | |
381 | } | |
382 | ||
d550d98d | 383 | return 0; |
1da177e4 LT |
384 | } |
385 | ||
386 | /* Use the acpiid in MADT to map cpus in case of SMP */ | |
f18c5a08 | 387 | |
1da177e4 | 388 | #ifndef CONFIG_SMP |
11bf04c4 | 389 | static int get_cpu_id(acpi_handle handle, u32 acpi_id) {return -1;} |
1da177e4 LT |
390 | #else |
391 | ||
f18c5a08 AS |
392 | static struct acpi_table_madt *madt; |
393 | ||
394 | static int map_lapic_id(struct acpi_subtable_header *entry, | |
395 | u32 acpi_id, int *apic_id) | |
396 | { | |
397 | struct acpi_madt_local_apic *lapic = | |
398 | (struct acpi_madt_local_apic *)entry; | |
399 | if ((lapic->lapic_flags & ACPI_MADT_ENABLED) && | |
400 | lapic->processor_id == acpi_id) { | |
401 | *apic_id = lapic->id; | |
402 | return 1; | |
403 | } | |
404 | return 0; | |
405 | } | |
406 | ||
407 | static int map_lsapic_id(struct acpi_subtable_header *entry, | |
408 | u32 acpi_id, int *apic_id) | |
409 | { | |
410 | struct acpi_madt_local_sapic *lsapic = | |
411 | (struct acpi_madt_local_sapic *)entry; | |
412 | /* Only check enabled APICs*/ | |
413 | if (lsapic->lapic_flags & ACPI_MADT_ENABLED) { | |
414 | /* First check against id */ | |
415 | if (lsapic->processor_id == acpi_id) { | |
615d5f23 | 416 | *apic_id = (lsapic->id << 8) | lsapic->eid; |
f18c5a08 AS |
417 | return 1; |
418 | /* Check against optional uid */ | |
419 | } else if (entry->length >= 16 && | |
420 | lsapic->uid == acpi_id) { | |
421 | *apic_id = lsapic->uid; | |
422 | return 1; | |
423 | } | |
424 | } | |
425 | return 0; | |
426 | } | |
427 | ||
f18c5a08 AS |
428 | static int map_madt_entry(u32 acpi_id) |
429 | { | |
430 | unsigned long madt_end, entry; | |
431 | int apic_id = -1; | |
432 | ||
433 | if (!madt) | |
434 | return apic_id; | |
435 | ||
436 | entry = (unsigned long)madt; | |
437 | madt_end = entry + madt->header.length; | |
438 | ||
439 | /* Parse all entries looking for a match. */ | |
440 | ||
441 | entry += sizeof(struct acpi_table_madt); | |
442 | while (entry + sizeof(struct acpi_subtable_header) < madt_end) { | |
443 | struct acpi_subtable_header *header = | |
444 | (struct acpi_subtable_header *)entry; | |
445 | if (header->type == ACPI_MADT_TYPE_LOCAL_APIC) { | |
446 | if (map_lapic_id(header, acpi_id, &apic_id)) | |
447 | break; | |
448 | } else if (header->type == ACPI_MADT_TYPE_LOCAL_SAPIC) { | |
449 | if (map_lsapic_id(header, acpi_id, &apic_id)) | |
450 | break; | |
451 | } | |
452 | entry += header->length; | |
453 | } | |
454 | return apic_id; | |
455 | } | |
456 | ||
457 | static int map_mat_entry(acpi_handle handle, u32 acpi_id) | |
458 | { | |
459 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
460 | union acpi_object *obj; | |
461 | struct acpi_subtable_header *header; | |
462 | int apic_id = -1; | |
463 | ||
464 | if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer))) | |
465 | goto exit; | |
466 | ||
467 | if (!buffer.length || !buffer.pointer) | |
468 | goto exit; | |
469 | ||
470 | obj = buffer.pointer; | |
471 | if (obj->type != ACPI_TYPE_BUFFER || | |
472 | obj->buffer.length < sizeof(struct acpi_subtable_header)) { | |
473 | goto exit; | |
474 | } | |
475 | ||
476 | header = (struct acpi_subtable_header *)obj->buffer.pointer; | |
477 | if (header->type == ACPI_MADT_TYPE_LOCAL_APIC) { | |
478 | map_lapic_id(header, acpi_id, &apic_id); | |
479 | } else if (header->type == ACPI_MADT_TYPE_LOCAL_SAPIC) { | |
480 | map_lsapic_id(header, acpi_id, &apic_id); | |
481 | } | |
482 | ||
483 | exit: | |
484 | if (buffer.pointer) | |
485 | kfree(buffer.pointer); | |
486 | return apic_id; | |
487 | } | |
488 | ||
11bf04c4 | 489 | static int get_cpu_id(acpi_handle handle, u32 acpi_id) |
1da177e4 | 490 | { |
4a35a46b | 491 | int i; |
f18c5a08 | 492 | int apic_id = -1; |
1da177e4 | 493 | |
f18c5a08 AS |
494 | apic_id = map_mat_entry(handle, acpi_id); |
495 | if (apic_id == -1) | |
496 | apic_id = map_madt_entry(acpi_id); | |
497 | if (apic_id == -1) | |
498 | return apic_id; | |
1da177e4 | 499 | |
fbb43ab0 | 500 | for_each_possible_cpu(i) { |
71b31233 | 501 | if (cpu_physical_id(i) == apic_id) |
4a35a46b | 502 | return i; |
1da177e4 LT |
503 | } |
504 | return -1; | |
505 | } | |
506 | #endif | |
507 | ||
508 | /* -------------------------------------------------------------------------- | |
509 | Driver Interface | |
510 | -------------------------------------------------------------------------- */ | |
511 | ||
11bf04c4 | 512 | static int acpi_processor_get_info(struct acpi_processor *pr, unsigned has_uid) |
1da177e4 | 513 | { |
4be44fcd LB |
514 | acpi_status status = 0; |
515 | union acpi_object object = { 0 }; | |
516 | struct acpi_buffer buffer = { sizeof(union acpi_object), &object }; | |
df42baa0 | 517 | int cpu_index; |
4be44fcd | 518 | static int cpu0_initialized; |
1da177e4 | 519 | |
1da177e4 LT |
520 | |
521 | if (!pr) | |
d550d98d | 522 | return -EINVAL; |
1da177e4 LT |
523 | |
524 | if (num_online_cpus() > 1) | |
525 | errata.smp = TRUE; | |
526 | ||
527 | acpi_processor_errata(pr); | |
528 | ||
529 | /* | |
530 | * Check to see if we have bus mastering arbitration control. This | |
531 | * is required for proper C3 usage (to maintain cache coherency). | |
532 | */ | |
cee324b1 | 533 | if (acpi_gbl_FADT.pm2_control_block && acpi_gbl_FADT.pm2_control_length) { |
1da177e4 LT |
534 | pr->flags.bm_control = 1; |
535 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd LB |
536 | "Bus mastering arbitration control present\n")); |
537 | } else | |
1da177e4 | 538 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
4be44fcd | 539 | "No bus mastering arbitration control\n")); |
1da177e4 | 540 | |
11bf04c4 AS |
541 | /* Check if it is a Device with HID and UID */ |
542 | if (has_uid) { | |
543 | unsigned long value; | |
544 | status = acpi_evaluate_integer(pr->handle, METHOD_NAME__UID, | |
545 | NULL, &value); | |
546 | if (ACPI_FAILURE(status)) { | |
547 | printk(KERN_ERR PREFIX "Evaluating processor _UID\n"); | |
548 | return -ENODEV; | |
549 | } | |
550 | pr->acpi_id = value; | |
551 | } else { | |
552 | /* | |
553 | * Evalute the processor object. Note that it is common on SMP to | |
554 | * have the first (boot) processor with a valid PBLK address while | |
555 | * all others have a NULL address. | |
556 | */ | |
557 | status = acpi_evaluate_object(pr->handle, NULL, NULL, &buffer); | |
558 | if (ACPI_FAILURE(status)) { | |
559 | printk(KERN_ERR PREFIX "Evaluating processor object\n"); | |
560 | return -ENODEV; | |
561 | } | |
1da177e4 | 562 | |
11bf04c4 AS |
563 | /* |
564 | * TBD: Synch processor ID (via LAPIC/LSAPIC structures) on SMP. | |
565 | * >>> 'acpi_get_processor_id(acpi_id, &id)' in arch/xxx/acpi.c | |
566 | */ | |
567 | pr->acpi_id = object.processor.proc_id; | |
568 | } | |
569 | cpu_index = get_cpu_id(pr->handle, pr->acpi_id); | |
1da177e4 | 570 | |
4be44fcd | 571 | /* Handle UP system running SMP kernel, with no LAPIC in MADT */ |
df42baa0 | 572 | if (!cpu0_initialized && (cpu_index == -1) && |
4be44fcd LB |
573 | (num_online_cpus() == 1)) { |
574 | cpu_index = 0; | |
575 | } | |
576 | ||
577 | cpu0_initialized = 1; | |
578 | ||
579 | pr->id = cpu_index; | |
580 | ||
581 | /* | |
582 | * Extra Processor objects may be enumerated on MP systems with | |
583 | * less than the max # of CPUs. They should be ignored _iff | |
584 | * they are physically not present. | |
585 | */ | |
f18c5a08 | 586 | if (pr->id == -1) { |
4be44fcd LB |
587 | if (ACPI_FAILURE |
588 | (acpi_processor_hotadd_init(pr->handle, &pr->id))) { | |
d550d98d | 589 | return -ENODEV; |
4be44fcd LB |
590 | } |
591 | } | |
1da177e4 LT |
592 | |
593 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Processor [%d:%d]\n", pr->id, | |
4be44fcd | 594 | pr->acpi_id)); |
1da177e4 LT |
595 | |
596 | if (!object.processor.pblk_address) | |
597 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No PBLK (NULL address)\n")); | |
598 | else if (object.processor.pblk_length != 6) | |
6468463a LB |
599 | printk(KERN_ERR PREFIX "Invalid PBLK length [%d]\n", |
600 | object.processor.pblk_length); | |
1da177e4 LT |
601 | else { |
602 | pr->throttling.address = object.processor.pblk_address; | |
cee324b1 AS |
603 | pr->throttling.duty_offset = acpi_gbl_FADT.duty_offset; |
604 | pr->throttling.duty_width = acpi_gbl_FADT.duty_width; | |
1da177e4 LT |
605 | |
606 | pr->pblk = object.processor.pblk_address; | |
607 | ||
608 | /* | |
609 | * We don't care about error returns - we just try to mark | |
610 | * these reserved so that nobody else is confused into thinking | |
611 | * that this region might be unused.. | |
612 | * | |
613 | * (In particular, allocating the IO range for Cardbus) | |
614 | */ | |
615 | request_region(pr->throttling.address, 6, "ACPI CPU throttle"); | |
616 | } | |
617 | ||
fe086a7b AC |
618 | /* |
619 | * If ACPI describes a slot number for this CPU, we can use it | |
620 | * ensure we get the right value in the "physical id" field | |
621 | * of /proc/cpuinfo | |
622 | */ | |
623 | status = acpi_evaluate_object(pr->handle, "_SUN", NULL, &buffer); | |
624 | if (ACPI_SUCCESS(status)) | |
625 | arch_fix_phys_package_id(pr->id, object.integer.value); | |
626 | ||
d550d98d | 627 | return 0; |
1da177e4 LT |
628 | } |
629 | ||
706546d0 | 630 | static DEFINE_PER_CPU(void *, processor_device_array); |
cd8e2b48 | 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; | |
9f1eb99c | 637 | struct sys_device *sysdev; |
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 | ||
fbb43ab0 | 647 | BUG_ON((pr->id >= nr_cpu_ids) || (pr->id < 0)); |
1da177e4 | 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 | */ | |
706546d0 MT |
654 | if (per_cpu(processor_device_array, pr->id) != NULL && |
655 | per_cpu(processor_device_array, pr->id) != device) { | |
4fdb2a05 | 656 | printk(KERN_WARNING "BIOS reported wrong ACPI id " |
0eacee58 | 657 | "for the processor\n"); |
d550d98d | 658 | return -ENODEV; |
cd8e2b48 | 659 | } |
706546d0 | 660 | per_cpu(processor_device_array, pr->id) = device; |
cd8e2b48 | 661 | |
706546d0 | 662 | per_cpu(processors, pr->id) = pr; |
1da177e4 LT |
663 | |
664 | result = acpi_processor_add_fs(device); | |
665 | if (result) | |
666 | goto end; | |
667 | ||
9f1eb99c ZR |
668 | sysdev = get_cpu_sysdev(pr->id); |
669 | if (sysfs_create_link(&device->dev.kobj, &sysdev->kobj, "sysdev")) | |
670 | return -EFAULT; | |
671 | ||
1da177e4 | 672 | status = acpi_install_notify_handler(pr->handle, ACPI_DEVICE_NOTIFY, |
4be44fcd | 673 | acpi_processor_notify, pr); |
1da177e4 | 674 | |
05131ecc VP |
675 | /* _PDC call should be done before doing anything else (if reqd.). */ |
676 | arch_acpi_processor_init_pdc(pr); | |
677 | acpi_processor_set_pdc(pr); | |
0ac3c571 ZY |
678 | #ifdef CONFIG_CPU_FREQ |
679 | acpi_processor_ppc_has_changed(pr); | |
680 | #endif | |
681 | acpi_processor_get_throttling_info(pr); | |
682 | acpi_processor_get_limit_info(pr); | |
683 | ||
05131ecc | 684 | |
1da177e4 LT |
685 | acpi_processor_power_init(pr, device); |
686 | ||
d9460fd2 ZR |
687 | pr->cdev = thermal_cooling_device_register("Processor", device, |
688 | &processor_cooling_ops); | |
d76628c6 TS |
689 | if (IS_ERR(pr->cdev)) { |
690 | result = PTR_ERR(pr->cdev); | |
691 | goto end; | |
692 | } | |
9030062f JL |
693 | |
694 | printk(KERN_INFO PREFIX | |
695 | "%s is registered as cooling_device%d\n", | |
696 | device->dev.bus_id, pr->cdev->id); | |
697 | ||
698 | result = sysfs_create_link(&device->dev.kobj, | |
699 | &pr->cdev->device.kobj, | |
700 | "thermal_cooling"); | |
701 | if (result) | |
702 | printk(KERN_ERR PREFIX "Create sysfs link\n"); | |
703 | result = sysfs_create_link(&pr->cdev->device.kobj, | |
704 | &device->dev.kobj, | |
705 | "device"); | |
706 | if (result) | |
707 | printk(KERN_ERR PREFIX "Create sysfs link\n"); | |
d9460fd2 | 708 | |
1da177e4 LT |
709 | if (pr->flags.throttling) { |
710 | printk(KERN_INFO PREFIX "%s [%s] (supports", | |
4be44fcd | 711 | acpi_device_name(device), acpi_device_bid(device)); |
1da177e4 LT |
712 | printk(" %d throttling states", pr->throttling.state_count); |
713 | printk(")\n"); | |
714 | } | |
715 | ||
4be44fcd | 716 | end: |
1da177e4 | 717 | |
d550d98d | 718 | return result; |
1da177e4 LT |
719 | } |
720 | ||
4be44fcd | 721 | static void acpi_processor_notify(acpi_handle handle, u32 event, void *data) |
1da177e4 | 722 | { |
50dd0969 | 723 | struct acpi_processor *pr = data; |
4be44fcd | 724 | struct acpi_device *device = NULL; |
e790cc8b | 725 | int saved; |
1da177e4 LT |
726 | |
727 | if (!pr) | |
d550d98d | 728 | return; |
1da177e4 LT |
729 | |
730 | if (acpi_bus_get_device(pr->handle, &device)) | |
d550d98d | 731 | return; |
1da177e4 LT |
732 | |
733 | switch (event) { | |
734 | case ACPI_PROCESSOR_NOTIFY_PERFORMANCE: | |
e790cc8b | 735 | saved = pr->performance_platform_limit; |
1da177e4 | 736 | acpi_processor_ppc_has_changed(pr); |
e790cc8b AS |
737 | if (saved == pr->performance_platform_limit) |
738 | break; | |
14e04fb3 | 739 | acpi_bus_generate_proc_event(device, event, |
4be44fcd | 740 | pr->performance_platform_limit); |
962ce8ca ZR |
741 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
742 | device->dev.bus_id, event, | |
743 | pr->performance_platform_limit); | |
1da177e4 LT |
744 | break; |
745 | case ACPI_PROCESSOR_NOTIFY_POWER: | |
746 | acpi_processor_cst_has_changed(pr); | |
14e04fb3 | 747 | acpi_bus_generate_proc_event(device, event, 0); |
962ce8ca ZR |
748 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
749 | device->dev.bus_id, event, 0); | |
1da177e4 | 750 | break; |
01854e69 LY |
751 | case ACPI_PROCESSOR_NOTIFY_THROTTLING: |
752 | acpi_processor_tstate_has_changed(pr); | |
14e04fb3 | 753 | acpi_bus_generate_proc_event(device, event, 0); |
962ce8ca ZR |
754 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
755 | device->dev.bus_id, event, 0); | |
1da177e4 LT |
756 | default: |
757 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 758 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
759 | break; |
760 | } | |
761 | ||
d550d98d | 762 | return; |
1da177e4 LT |
763 | } |
764 | ||
729c6ba3 VP |
765 | static int acpi_cpu_soft_notify(struct notifier_block *nfb, |
766 | unsigned long action, void *hcpu) | |
767 | { | |
768 | unsigned int cpu = (unsigned long)hcpu; | |
706546d0 | 769 | struct acpi_processor *pr = per_cpu(processors, cpu); |
729c6ba3 VP |
770 | |
771 | if (action == CPU_ONLINE && pr) { | |
772 | acpi_processor_ppc_has_changed(pr); | |
773 | acpi_processor_cst_has_changed(pr); | |
774 | acpi_processor_tstate_has_changed(pr); | |
775 | } | |
776 | return NOTIFY_OK; | |
777 | } | |
778 | ||
779 | static struct notifier_block acpi_cpu_notifier = | |
780 | { | |
781 | .notifier_call = acpi_cpu_soft_notify, | |
782 | }; | |
783 | ||
4be44fcd | 784 | static int acpi_processor_add(struct acpi_device *device) |
1da177e4 | 785 | { |
4be44fcd | 786 | struct acpi_processor *pr = NULL; |
1da177e4 | 787 | |
1da177e4 LT |
788 | |
789 | if (!device) | |
d550d98d | 790 | return -EINVAL; |
1da177e4 | 791 | |
36bcbec7 | 792 | pr = kzalloc(sizeof(struct acpi_processor), GFP_KERNEL); |
1da177e4 | 793 | if (!pr) |
d550d98d | 794 | return -ENOMEM; |
1da177e4 LT |
795 | |
796 | pr->handle = device->handle; | |
797 | strcpy(acpi_device_name(device), ACPI_PROCESSOR_DEVICE_NAME); | |
798 | strcpy(acpi_device_class(device), ACPI_PROCESSOR_CLASS); | |
799 | acpi_driver_data(device) = pr; | |
800 | ||
d550d98d | 801 | return 0; |
1da177e4 LT |
802 | } |
803 | ||
4be44fcd | 804 | static int acpi_processor_remove(struct acpi_device *device, int type) |
1da177e4 | 805 | { |
4be44fcd LB |
806 | acpi_status status = AE_OK; |
807 | struct acpi_processor *pr = NULL; | |
1da177e4 | 808 | |
1da177e4 LT |
809 | |
810 | if (!device || !acpi_driver_data(device)) | |
d550d98d | 811 | return -EINVAL; |
1da177e4 | 812 | |
50dd0969 | 813 | pr = acpi_driver_data(device); |
1da177e4 | 814 | |
fbb43ab0 | 815 | if (pr->id >= nr_cpu_ids) { |
1da177e4 | 816 | kfree(pr); |
d550d98d | 817 | return 0; |
1da177e4 LT |
818 | } |
819 | ||
820 | if (type == ACPI_BUS_REMOVAL_EJECT) { | |
821 | if (acpi_processor_handle_eject(pr)) | |
d550d98d | 822 | return -EINVAL; |
1da177e4 LT |
823 | } |
824 | ||
825 | acpi_processor_power_exit(pr, device); | |
826 | ||
827 | status = acpi_remove_notify_handler(pr->handle, ACPI_DEVICE_NOTIFY, | |
4be44fcd | 828 | acpi_processor_notify); |
1da177e4 | 829 | |
9f1eb99c ZR |
830 | sysfs_remove_link(&device->dev.kobj, "sysdev"); |
831 | ||
1da177e4 LT |
832 | acpi_processor_remove_fs(device); |
833 | ||
f28bb45e ZY |
834 | if (pr->cdev) { |
835 | sysfs_remove_link(&device->dev.kobj, "thermal_cooling"); | |
836 | sysfs_remove_link(&pr->cdev->device.kobj, "device"); | |
837 | thermal_cooling_device_unregister(pr->cdev); | |
838 | pr->cdev = NULL; | |
839 | } | |
d9460fd2 | 840 | |
706546d0 MT |
841 | per_cpu(processors, pr->id) = NULL; |
842 | per_cpu(processor_device_array, pr->id) = NULL; | |
1da177e4 LT |
843 | kfree(pr); |
844 | ||
d550d98d | 845 | return 0; |
1da177e4 LT |
846 | } |
847 | ||
848 | #ifdef CONFIG_ACPI_HOTPLUG_CPU | |
849 | /**************************************************************************** | |
850 | * Acpi processor hotplug support * | |
851 | ****************************************************************************/ | |
852 | ||
4be44fcd | 853 | static int is_processor_present(acpi_handle handle) |
1da177e4 | 854 | { |
4be44fcd LB |
855 | acpi_status status; |
856 | unsigned long sta = 0; | |
1da177e4 | 857 | |
1da177e4 LT |
858 | |
859 | status = acpi_evaluate_integer(handle, "_STA", NULL, &sta); | |
cfaf3747 ZR |
860 | |
861 | if (ACPI_SUCCESS(status) && (sta & ACPI_STA_DEVICE_PRESENT)) | |
862 | return 1; | |
863 | ||
d0ce46f5 ZR |
864 | /* |
865 | * _STA is mandatory for a processor that supports hot plug | |
866 | */ | |
867 | if (status == AE_NOT_FOUND) | |
868 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
869 | "Processor does not support hot plug\n")); | |
870 | else | |
871 | ACPI_EXCEPTION((AE_INFO, status, | |
872 | "Processor Device is not present")); | |
cfaf3747 | 873 | return 0; |
1da177e4 LT |
874 | } |
875 | ||
1da177e4 | 876 | static |
4be44fcd | 877 | int acpi_processor_device_add(acpi_handle handle, struct acpi_device **device) |
1da177e4 | 878 | { |
4be44fcd LB |
879 | acpi_handle phandle; |
880 | struct acpi_device *pdev; | |
881 | struct acpi_processor *pr; | |
1da177e4 | 882 | |
1da177e4 LT |
883 | |
884 | if (acpi_get_parent(handle, &phandle)) { | |
d550d98d | 885 | return -ENODEV; |
1da177e4 LT |
886 | } |
887 | ||
888 | if (acpi_bus_get_device(phandle, &pdev)) { | |
d550d98d | 889 | return -ENODEV; |
1da177e4 LT |
890 | } |
891 | ||
892 | if (acpi_bus_add(device, pdev, handle, ACPI_BUS_TYPE_PROCESSOR)) { | |
d550d98d | 893 | return -ENODEV; |
1da177e4 LT |
894 | } |
895 | ||
3fb02738 | 896 | acpi_bus_start(*device); |
1da177e4 LT |
897 | |
898 | pr = acpi_driver_data(*device); | |
899 | if (!pr) | |
d550d98d | 900 | return -ENODEV; |
1da177e4 | 901 | |
fbb43ab0 | 902 | if ((pr->id >= 0) && (pr->id < nr_cpu_ids)) { |
f883d9db | 903 | kobject_uevent(&(*device)->dev.kobj, KOBJ_ONLINE); |
1da177e4 | 904 | } |
d550d98d | 905 | return 0; |
1da177e4 LT |
906 | } |
907 | ||
b95e9e8d SR |
908 | static void __ref acpi_processor_hotplug_notify(acpi_handle handle, |
909 | u32 event, void *data) | |
1da177e4 | 910 | { |
4be44fcd LB |
911 | struct acpi_processor *pr; |
912 | struct acpi_device *device = NULL; | |
1da177e4 LT |
913 | int result; |
914 | ||
1da177e4 LT |
915 | |
916 | switch (event) { | |
917 | case ACPI_NOTIFY_BUS_CHECK: | |
918 | case ACPI_NOTIFY_DEVICE_CHECK: | |
d6f882e1 GC |
919 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
920 | "Processor driver received %s event\n", | |
4be44fcd | 921 | (event == ACPI_NOTIFY_BUS_CHECK) ? |
d6f882e1 | 922 | "ACPI_NOTIFY_BUS_CHECK" : "ACPI_NOTIFY_DEVICE_CHECK")); |
1da177e4 LT |
923 | |
924 | if (!is_processor_present(handle)) | |
925 | break; | |
926 | ||
927 | if (acpi_bus_get_device(handle, &device)) { | |
928 | result = acpi_processor_device_add(handle, &device); | |
929 | if (result) | |
6468463a LB |
930 | printk(KERN_ERR PREFIX |
931 | "Unable to add the device\n"); | |
1da177e4 LT |
932 | break; |
933 | } | |
934 | ||
935 | pr = acpi_driver_data(device); | |
936 | if (!pr) { | |
6468463a | 937 | printk(KERN_ERR PREFIX "Driver data is NULL\n"); |
1da177e4 LT |
938 | break; |
939 | } | |
940 | ||
fbb43ab0 | 941 | if (pr->id >= 0 && (pr->id < nr_cpu_ids)) { |
f883d9db | 942 | kobject_uevent(&device->dev.kobj, KOBJ_OFFLINE); |
1da177e4 LT |
943 | break; |
944 | } | |
945 | ||
946 | result = acpi_processor_start(device); | |
fbb43ab0 | 947 | if ((!result) && ((pr->id >= 0) && (pr->id < nr_cpu_ids))) { |
f883d9db | 948 | kobject_uevent(&device->dev.kobj, KOBJ_ONLINE); |
1da177e4 | 949 | } else { |
6468463a LB |
950 | printk(KERN_ERR PREFIX "Device [%s] failed to start\n", |
951 | acpi_device_bid(device)); | |
1da177e4 | 952 | } |
4be44fcd | 953 | break; |
1da177e4 | 954 | case ACPI_NOTIFY_EJECT_REQUEST: |
4be44fcd LB |
955 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
956 | "received ACPI_NOTIFY_EJECT_REQUEST\n")); | |
1da177e4 LT |
957 | |
958 | if (acpi_bus_get_device(handle, &device)) { | |
6468463a LB |
959 | printk(KERN_ERR PREFIX |
960 | "Device don't exist, dropping EJECT\n"); | |
1da177e4 LT |
961 | break; |
962 | } | |
963 | pr = acpi_driver_data(device); | |
964 | if (!pr) { | |
6468463a LB |
965 | printk(KERN_ERR PREFIX |
966 | "Driver data is NULL, dropping EJECT\n"); | |
d550d98d | 967 | return; |
1da177e4 LT |
968 | } |
969 | ||
fbb43ab0 | 970 | if ((pr->id < nr_cpu_ids) && (cpu_present(pr->id))) |
f883d9db | 971 | kobject_uevent(&device->dev.kobj, KOBJ_OFFLINE); |
1da177e4 LT |
972 | break; |
973 | default: | |
974 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 975 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
976 | break; |
977 | } | |
978 | ||
d550d98d | 979 | return; |
1da177e4 LT |
980 | } |
981 | ||
982 | static acpi_status | |
983 | processor_walk_namespace_cb(acpi_handle handle, | |
4be44fcd | 984 | u32 lvl, void *context, void **rv) |
1da177e4 | 985 | { |
4be44fcd | 986 | acpi_status status; |
1da177e4 | 987 | int *action = context; |
4be44fcd | 988 | acpi_object_type type = 0; |
1da177e4 LT |
989 | |
990 | status = acpi_get_type(handle, &type); | |
991 | if (ACPI_FAILURE(status)) | |
4be44fcd | 992 | return (AE_OK); |
1da177e4 LT |
993 | |
994 | if (type != ACPI_TYPE_PROCESSOR) | |
4be44fcd | 995 | return (AE_OK); |
1da177e4 | 996 | |
4be44fcd | 997 | switch (*action) { |
1da177e4 LT |
998 | case INSTALL_NOTIFY_HANDLER: |
999 | acpi_install_notify_handler(handle, | |
4be44fcd LB |
1000 | ACPI_SYSTEM_NOTIFY, |
1001 | acpi_processor_hotplug_notify, | |
1002 | NULL); | |
1da177e4 LT |
1003 | break; |
1004 | case UNINSTALL_NOTIFY_HANDLER: | |
1005 | acpi_remove_notify_handler(handle, | |
4be44fcd LB |
1006 | ACPI_SYSTEM_NOTIFY, |
1007 | acpi_processor_hotplug_notify); | |
1da177e4 LT |
1008 | break; |
1009 | default: | |
1010 | break; | |
1011 | } | |
1012 | ||
4be44fcd | 1013 | return (AE_OK); |
1da177e4 LT |
1014 | } |
1015 | ||
4be44fcd | 1016 | static acpi_status acpi_processor_hotadd_init(acpi_handle handle, int *p_cpu) |
1da177e4 | 1017 | { |
1da177e4 LT |
1018 | |
1019 | if (!is_processor_present(handle)) { | |
d550d98d | 1020 | return AE_ERROR; |
1da177e4 LT |
1021 | } |
1022 | ||
1023 | if (acpi_map_lsapic(handle, p_cpu)) | |
d550d98d | 1024 | return AE_ERROR; |
1da177e4 LT |
1025 | |
1026 | if (arch_register_cpu(*p_cpu)) { | |
1027 | acpi_unmap_lsapic(*p_cpu); | |
d550d98d | 1028 | return AE_ERROR; |
1da177e4 LT |
1029 | } |
1030 | ||
d550d98d | 1031 | return AE_OK; |
1da177e4 LT |
1032 | } |
1033 | ||
4be44fcd | 1034 | static int acpi_processor_handle_eject(struct acpi_processor *pr) |
1da177e4 | 1035 | { |
b62b8ef9 ZR |
1036 | if (cpu_online(pr->id)) |
1037 | cpu_down(pr->id); | |
1038 | ||
1da177e4 LT |
1039 | arch_unregister_cpu(pr->id); |
1040 | acpi_unmap_lsapic(pr->id); | |
4be44fcd | 1041 | return (0); |
1da177e4 LT |
1042 | } |
1043 | #else | |
4be44fcd | 1044 | static acpi_status acpi_processor_hotadd_init(acpi_handle handle, int *p_cpu) |
1da177e4 LT |
1045 | { |
1046 | return AE_ERROR; | |
1047 | } | |
4be44fcd | 1048 | static int acpi_processor_handle_eject(struct acpi_processor *pr) |
1da177e4 | 1049 | { |
4be44fcd | 1050 | return (-EINVAL); |
1da177e4 LT |
1051 | } |
1052 | #endif | |
1053 | ||
1da177e4 LT |
1054 | static |
1055 | void acpi_processor_install_hotplug_notify(void) | |
1056 | { | |
1057 | #ifdef CONFIG_ACPI_HOTPLUG_CPU | |
1058 | int action = INSTALL_NOTIFY_HANDLER; | |
1059 | acpi_walk_namespace(ACPI_TYPE_PROCESSOR, | |
4be44fcd LB |
1060 | ACPI_ROOT_OBJECT, |
1061 | ACPI_UINT32_MAX, | |
1062 | processor_walk_namespace_cb, &action, NULL); | |
1da177e4 | 1063 | #endif |
729c6ba3 | 1064 | register_hotcpu_notifier(&acpi_cpu_notifier); |
1da177e4 LT |
1065 | } |
1066 | ||
1da177e4 LT |
1067 | static |
1068 | void acpi_processor_uninstall_hotplug_notify(void) | |
1069 | { | |
1070 | #ifdef CONFIG_ACPI_HOTPLUG_CPU | |
1071 | int action = UNINSTALL_NOTIFY_HANDLER; | |
1072 | acpi_walk_namespace(ACPI_TYPE_PROCESSOR, | |
4be44fcd LB |
1073 | ACPI_ROOT_OBJECT, |
1074 | ACPI_UINT32_MAX, | |
1075 | processor_walk_namespace_cb, &action, NULL); | |
1da177e4 | 1076 | #endif |
729c6ba3 | 1077 | unregister_hotcpu_notifier(&acpi_cpu_notifier); |
1da177e4 LT |
1078 | } |
1079 | ||
1080 | /* | |
1081 | * We keep the driver loaded even when ACPI is not running. | |
1082 | * This is needed for the powernow-k8 driver, that works even without | |
1083 | * ACPI, but needs symbols from this driver | |
1084 | */ | |
1085 | ||
4be44fcd | 1086 | static int __init acpi_processor_init(void) |
1da177e4 | 1087 | { |
4be44fcd | 1088 | int result = 0; |
1da177e4 | 1089 | |
1da177e4 LT |
1090 | memset(&errata, 0, sizeof(errata)); |
1091 | ||
f18c5a08 AS |
1092 | #ifdef CONFIG_SMP |
1093 | if (ACPI_FAILURE(acpi_get_table(ACPI_SIG_MADT, 0, | |
1094 | (struct acpi_table_header **)&madt))) | |
70c0846e | 1095 | madt = NULL; |
f18c5a08 AS |
1096 | #endif |
1097 | ||
1da177e4 LT |
1098 | acpi_processor_dir = proc_mkdir(ACPI_PROCESSOR_CLASS, acpi_root_dir); |
1099 | if (!acpi_processor_dir) | |
83822fc9 | 1100 | return -ENOMEM; |
1da177e4 LT |
1101 | acpi_processor_dir->owner = THIS_MODULE; |
1102 | ||
4f86d3a8 LB |
1103 | result = cpuidle_register_driver(&acpi_idle_driver); |
1104 | if (result < 0) | |
1105 | goto out_proc; | |
1106 | ||
1da177e4 | 1107 | result = acpi_bus_register_driver(&acpi_processor_driver); |
4f86d3a8 LB |
1108 | if (result < 0) |
1109 | goto out_cpuidle; | |
1da177e4 LT |
1110 | |
1111 | acpi_processor_install_hotplug_notify(); | |
1112 | ||
1113 | acpi_thermal_cpufreq_init(); | |
1114 | ||
1115 | acpi_processor_ppc_init(); | |
1116 | ||
1180509f ZY |
1117 | acpi_processor_throttling_init(); |
1118 | ||
d550d98d | 1119 | return 0; |
4f86d3a8 LB |
1120 | |
1121 | out_cpuidle: | |
1122 | cpuidle_unregister_driver(&acpi_idle_driver); | |
1123 | ||
1124 | out_proc: | |
1125 | remove_proc_entry(ACPI_PROCESSOR_CLASS, acpi_root_dir); | |
1126 | ||
1127 | return result; | |
1da177e4 LT |
1128 | } |
1129 | ||
4be44fcd | 1130 | static void __exit acpi_processor_exit(void) |
1da177e4 | 1131 | { |
1da177e4 LT |
1132 | acpi_processor_ppc_exit(); |
1133 | ||
1134 | acpi_thermal_cpufreq_exit(); | |
1135 | ||
1136 | acpi_processor_uninstall_hotplug_notify(); | |
1137 | ||
1138 | acpi_bus_unregister_driver(&acpi_processor_driver); | |
1139 | ||
4f86d3a8 LB |
1140 | cpuidle_unregister_driver(&acpi_idle_driver); |
1141 | ||
1da177e4 LT |
1142 | remove_proc_entry(ACPI_PROCESSOR_CLASS, acpi_root_dir); |
1143 | ||
d550d98d | 1144 | return; |
1da177e4 LT |
1145 | } |
1146 | ||
1da177e4 LT |
1147 | module_init(acpi_processor_init); |
1148 | module_exit(acpi_processor_exit); | |
1149 | ||
1150 | EXPORT_SYMBOL(acpi_processor_set_thermal_limit); | |
1151 | ||
1152 | MODULE_ALIAS("processor"); |