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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 | 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; |
02df8b93 | 268 | |
05131ecc | 269 | status = acpi_evaluate_object(pr->handle, "_PDC", pdc_in, NULL); |
02df8b93 | 270 | |
05131ecc | 271 | if (ACPI_FAILURE(status)) |
4be44fcd | 272 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
05131ecc | 273 | "Could not evaluate _PDC, using legacy perf. control...\n")); |
02df8b93 | 274 | |
d550d98d | 275 | return status; |
02df8b93 VP |
276 | } |
277 | ||
1da177e4 LT |
278 | /* -------------------------------------------------------------------------- |
279 | FS Interface (/proc) | |
280 | -------------------------------------------------------------------------- */ | |
281 | ||
4be44fcd | 282 | static struct proc_dir_entry *acpi_processor_dir = NULL; |
1da177e4 LT |
283 | |
284 | static int acpi_processor_info_seq_show(struct seq_file *seq, void *offset) | |
285 | { | |
50dd0969 | 286 | struct acpi_processor *pr = seq->private; |
1da177e4 | 287 | |
1da177e4 LT |
288 | |
289 | if (!pr) | |
290 | goto end; | |
291 | ||
292 | seq_printf(seq, "processor id: %d\n" | |
4be44fcd LB |
293 | "acpi id: %d\n" |
294 | "bus mastering control: %s\n" | |
295 | "power management: %s\n" | |
296 | "throttling control: %s\n" | |
297 | "limit interface: %s\n", | |
298 | pr->id, | |
299 | pr->acpi_id, | |
300 | pr->flags.bm_control ? "yes" : "no", | |
301 | pr->flags.power ? "yes" : "no", | |
302 | pr->flags.throttling ? "yes" : "no", | |
303 | pr->flags.limit ? "yes" : "no"); | |
304 | ||
305 | end: | |
d550d98d | 306 | return 0; |
1da177e4 LT |
307 | } |
308 | ||
309 | static int acpi_processor_info_open_fs(struct inode *inode, struct file *file) | |
310 | { | |
311 | return single_open(file, acpi_processor_info_seq_show, | |
4be44fcd | 312 | PDE(inode)->data); |
1da177e4 LT |
313 | } |
314 | ||
4be44fcd | 315 | static int acpi_processor_add_fs(struct acpi_device *device) |
1da177e4 | 316 | { |
4be44fcd | 317 | struct proc_dir_entry *entry = NULL; |
1da177e4 | 318 | |
1da177e4 LT |
319 | |
320 | if (!acpi_device_dir(device)) { | |
321 | acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), | |
4be44fcd | 322 | acpi_processor_dir); |
1da177e4 | 323 | if (!acpi_device_dir(device)) |
d550d98d | 324 | return -ENODEV; |
1da177e4 LT |
325 | } |
326 | acpi_device_dir(device)->owner = THIS_MODULE; | |
327 | ||
328 | /* 'info' [R] */ | |
cf7acfab DL |
329 | entry = proc_create_data(ACPI_PROCESSOR_FILE_INFO, |
330 | S_IRUGO, acpi_device_dir(device), | |
331 | &acpi_processor_info_fops, | |
332 | acpi_driver_data(device)); | |
1da177e4 | 333 | if (!entry) |
d550d98d | 334 | return -EIO; |
1da177e4 LT |
335 | |
336 | /* 'throttling' [R/W] */ | |
cf7acfab DL |
337 | entry = proc_create_data(ACPI_PROCESSOR_FILE_THROTTLING, |
338 | S_IFREG | S_IRUGO | S_IWUSR, | |
339 | acpi_device_dir(device), | |
340 | &acpi_processor_throttling_fops, | |
341 | acpi_driver_data(device)); | |
1da177e4 | 342 | if (!entry) |
d550d98d | 343 | return -EIO; |
1da177e4 LT |
344 | |
345 | /* 'limit' [R/W] */ | |
cf7acfab DL |
346 | entry = proc_create_data(ACPI_PROCESSOR_FILE_LIMIT, |
347 | S_IFREG | S_IRUGO | S_IWUSR, | |
348 | acpi_device_dir(device), | |
349 | &acpi_processor_limit_fops, | |
350 | acpi_driver_data(device)); | |
1da177e4 | 351 | if (!entry) |
d550d98d | 352 | return -EIO; |
d550d98d | 353 | return 0; |
1da177e4 LT |
354 | } |
355 | ||
4be44fcd | 356 | static int acpi_processor_remove_fs(struct acpi_device *device) |
1da177e4 | 357 | { |
1da177e4 LT |
358 | |
359 | if (acpi_device_dir(device)) { | |
4be44fcd LB |
360 | remove_proc_entry(ACPI_PROCESSOR_FILE_INFO, |
361 | acpi_device_dir(device)); | |
1da177e4 | 362 | remove_proc_entry(ACPI_PROCESSOR_FILE_THROTTLING, |
4be44fcd LB |
363 | acpi_device_dir(device)); |
364 | remove_proc_entry(ACPI_PROCESSOR_FILE_LIMIT, | |
365 | acpi_device_dir(device)); | |
1da177e4 LT |
366 | remove_proc_entry(acpi_device_bid(device), acpi_processor_dir); |
367 | acpi_device_dir(device) = NULL; | |
368 | } | |
369 | ||
d550d98d | 370 | return 0; |
1da177e4 LT |
371 | } |
372 | ||
373 | /* Use the acpiid in MADT to map cpus in case of SMP */ | |
f18c5a08 | 374 | |
1da177e4 | 375 | #ifndef CONFIG_SMP |
11bf04c4 | 376 | static int get_cpu_id(acpi_handle handle, u32 acpi_id) {return -1;} |
1da177e4 LT |
377 | #else |
378 | ||
f18c5a08 AS |
379 | static struct acpi_table_madt *madt; |
380 | ||
381 | static int map_lapic_id(struct acpi_subtable_header *entry, | |
382 | u32 acpi_id, int *apic_id) | |
383 | { | |
384 | struct acpi_madt_local_apic *lapic = | |
385 | (struct acpi_madt_local_apic *)entry; | |
386 | if ((lapic->lapic_flags & ACPI_MADT_ENABLED) && | |
387 | lapic->processor_id == acpi_id) { | |
388 | *apic_id = lapic->id; | |
389 | return 1; | |
390 | } | |
391 | return 0; | |
392 | } | |
393 | ||
394 | static int map_lsapic_id(struct acpi_subtable_header *entry, | |
395 | u32 acpi_id, int *apic_id) | |
396 | { | |
397 | struct acpi_madt_local_sapic *lsapic = | |
398 | (struct acpi_madt_local_sapic *)entry; | |
399 | /* Only check enabled APICs*/ | |
400 | if (lsapic->lapic_flags & ACPI_MADT_ENABLED) { | |
401 | /* First check against id */ | |
402 | if (lsapic->processor_id == acpi_id) { | |
615d5f23 | 403 | *apic_id = (lsapic->id << 8) | lsapic->eid; |
f18c5a08 AS |
404 | return 1; |
405 | /* Check against optional uid */ | |
406 | } else if (entry->length >= 16 && | |
407 | lsapic->uid == acpi_id) { | |
408 | *apic_id = lsapic->uid; | |
409 | return 1; | |
410 | } | |
411 | } | |
412 | return 0; | |
413 | } | |
414 | ||
f18c5a08 AS |
415 | static int map_madt_entry(u32 acpi_id) |
416 | { | |
417 | unsigned long madt_end, entry; | |
418 | int apic_id = -1; | |
419 | ||
420 | if (!madt) | |
421 | return apic_id; | |
422 | ||
423 | entry = (unsigned long)madt; | |
424 | madt_end = entry + madt->header.length; | |
425 | ||
426 | /* Parse all entries looking for a match. */ | |
427 | ||
428 | entry += sizeof(struct acpi_table_madt); | |
429 | while (entry + sizeof(struct acpi_subtable_header) < madt_end) { | |
430 | struct acpi_subtable_header *header = | |
431 | (struct acpi_subtable_header *)entry; | |
432 | if (header->type == ACPI_MADT_TYPE_LOCAL_APIC) { | |
433 | if (map_lapic_id(header, acpi_id, &apic_id)) | |
434 | break; | |
435 | } else if (header->type == ACPI_MADT_TYPE_LOCAL_SAPIC) { | |
436 | if (map_lsapic_id(header, acpi_id, &apic_id)) | |
437 | break; | |
438 | } | |
439 | entry += header->length; | |
440 | } | |
441 | return apic_id; | |
442 | } | |
443 | ||
444 | static int map_mat_entry(acpi_handle handle, u32 acpi_id) | |
445 | { | |
446 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
447 | union acpi_object *obj; | |
448 | struct acpi_subtable_header *header; | |
449 | int apic_id = -1; | |
450 | ||
451 | if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer))) | |
452 | goto exit; | |
453 | ||
454 | if (!buffer.length || !buffer.pointer) | |
455 | goto exit; | |
456 | ||
457 | obj = buffer.pointer; | |
458 | if (obj->type != ACPI_TYPE_BUFFER || | |
459 | obj->buffer.length < sizeof(struct acpi_subtable_header)) { | |
460 | goto exit; | |
461 | } | |
462 | ||
463 | header = (struct acpi_subtable_header *)obj->buffer.pointer; | |
464 | if (header->type == ACPI_MADT_TYPE_LOCAL_APIC) { | |
465 | map_lapic_id(header, acpi_id, &apic_id); | |
466 | } else if (header->type == ACPI_MADT_TYPE_LOCAL_SAPIC) { | |
467 | map_lsapic_id(header, acpi_id, &apic_id); | |
468 | } | |
469 | ||
470 | exit: | |
471 | if (buffer.pointer) | |
472 | kfree(buffer.pointer); | |
473 | return apic_id; | |
474 | } | |
475 | ||
11bf04c4 | 476 | static int get_cpu_id(acpi_handle handle, u32 acpi_id) |
1da177e4 | 477 | { |
4a35a46b | 478 | int i; |
f18c5a08 | 479 | int apic_id = -1; |
1da177e4 | 480 | |
f18c5a08 AS |
481 | apic_id = map_mat_entry(handle, acpi_id); |
482 | if (apic_id == -1) | |
483 | apic_id = map_madt_entry(acpi_id); | |
484 | if (apic_id == -1) | |
485 | return apic_id; | |
1da177e4 | 486 | |
fbb43ab0 | 487 | for_each_possible_cpu(i) { |
71b31233 | 488 | if (cpu_physical_id(i) == apic_id) |
4a35a46b | 489 | return i; |
1da177e4 LT |
490 | } |
491 | return -1; | |
492 | } | |
493 | #endif | |
494 | ||
495 | /* -------------------------------------------------------------------------- | |
496 | Driver Interface | |
497 | -------------------------------------------------------------------------- */ | |
498 | ||
11bf04c4 | 499 | static int acpi_processor_get_info(struct acpi_processor *pr, unsigned has_uid) |
1da177e4 | 500 | { |
4be44fcd LB |
501 | acpi_status status = 0; |
502 | union acpi_object object = { 0 }; | |
503 | struct acpi_buffer buffer = { sizeof(union acpi_object), &object }; | |
df42baa0 | 504 | int cpu_index; |
4be44fcd | 505 | static int cpu0_initialized; |
1da177e4 | 506 | |
1da177e4 LT |
507 | |
508 | if (!pr) | |
d550d98d | 509 | return -EINVAL; |
1da177e4 LT |
510 | |
511 | if (num_online_cpus() > 1) | |
512 | errata.smp = TRUE; | |
513 | ||
514 | acpi_processor_errata(pr); | |
515 | ||
516 | /* | |
517 | * Check to see if we have bus mastering arbitration control. This | |
518 | * is required for proper C3 usage (to maintain cache coherency). | |
519 | */ | |
cee324b1 | 520 | if (acpi_gbl_FADT.pm2_control_block && acpi_gbl_FADT.pm2_control_length) { |
1da177e4 LT |
521 | pr->flags.bm_control = 1; |
522 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd LB |
523 | "Bus mastering arbitration control present\n")); |
524 | } else | |
1da177e4 | 525 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
4be44fcd | 526 | "No bus mastering arbitration control\n")); |
1da177e4 | 527 | |
11bf04c4 AS |
528 | /* Check if it is a Device with HID and UID */ |
529 | if (has_uid) { | |
530 | unsigned long value; | |
531 | status = acpi_evaluate_integer(pr->handle, METHOD_NAME__UID, | |
532 | NULL, &value); | |
533 | if (ACPI_FAILURE(status)) { | |
534 | printk(KERN_ERR PREFIX "Evaluating processor _UID\n"); | |
535 | return -ENODEV; | |
536 | } | |
537 | pr->acpi_id = value; | |
538 | } else { | |
539 | /* | |
540 | * Evalute the processor object. Note that it is common on SMP to | |
541 | * have the first (boot) processor with a valid PBLK address while | |
542 | * all others have a NULL address. | |
543 | */ | |
544 | status = acpi_evaluate_object(pr->handle, NULL, NULL, &buffer); | |
545 | if (ACPI_FAILURE(status)) { | |
546 | printk(KERN_ERR PREFIX "Evaluating processor object\n"); | |
547 | return -ENODEV; | |
548 | } | |
1da177e4 | 549 | |
11bf04c4 AS |
550 | /* |
551 | * TBD: Synch processor ID (via LAPIC/LSAPIC structures) on SMP. | |
552 | * >>> 'acpi_get_processor_id(acpi_id, &id)' in arch/xxx/acpi.c | |
553 | */ | |
554 | pr->acpi_id = object.processor.proc_id; | |
555 | } | |
556 | cpu_index = get_cpu_id(pr->handle, pr->acpi_id); | |
1da177e4 | 557 | |
4be44fcd | 558 | /* Handle UP system running SMP kernel, with no LAPIC in MADT */ |
df42baa0 | 559 | if (!cpu0_initialized && (cpu_index == -1) && |
4be44fcd LB |
560 | (num_online_cpus() == 1)) { |
561 | cpu_index = 0; | |
562 | } | |
563 | ||
564 | cpu0_initialized = 1; | |
565 | ||
566 | pr->id = cpu_index; | |
567 | ||
568 | /* | |
569 | * Extra Processor objects may be enumerated on MP systems with | |
570 | * less than the max # of CPUs. They should be ignored _iff | |
571 | * they are physically not present. | |
572 | */ | |
f18c5a08 | 573 | if (pr->id == -1) { |
4be44fcd LB |
574 | if (ACPI_FAILURE |
575 | (acpi_processor_hotadd_init(pr->handle, &pr->id))) { | |
d550d98d | 576 | return -ENODEV; |
4be44fcd LB |
577 | } |
578 | } | |
1da177e4 LT |
579 | |
580 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Processor [%d:%d]\n", pr->id, | |
4be44fcd | 581 | pr->acpi_id)); |
1da177e4 LT |
582 | |
583 | if (!object.processor.pblk_address) | |
584 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No PBLK (NULL address)\n")); | |
585 | else if (object.processor.pblk_length != 6) | |
6468463a LB |
586 | printk(KERN_ERR PREFIX "Invalid PBLK length [%d]\n", |
587 | object.processor.pblk_length); | |
1da177e4 LT |
588 | else { |
589 | pr->throttling.address = object.processor.pblk_address; | |
cee324b1 AS |
590 | pr->throttling.duty_offset = acpi_gbl_FADT.duty_offset; |
591 | pr->throttling.duty_width = acpi_gbl_FADT.duty_width; | |
1da177e4 LT |
592 | |
593 | pr->pblk = object.processor.pblk_address; | |
594 | ||
595 | /* | |
596 | * We don't care about error returns - we just try to mark | |
597 | * these reserved so that nobody else is confused into thinking | |
598 | * that this region might be unused.. | |
599 | * | |
600 | * (In particular, allocating the IO range for Cardbus) | |
601 | */ | |
602 | request_region(pr->throttling.address, 6, "ACPI CPU throttle"); | |
603 | } | |
604 | ||
fe086a7b AC |
605 | /* |
606 | * If ACPI describes a slot number for this CPU, we can use it | |
607 | * ensure we get the right value in the "physical id" field | |
608 | * of /proc/cpuinfo | |
609 | */ | |
610 | status = acpi_evaluate_object(pr->handle, "_SUN", NULL, &buffer); | |
611 | if (ACPI_SUCCESS(status)) | |
612 | arch_fix_phys_package_id(pr->id, object.integer.value); | |
613 | ||
d550d98d | 614 | return 0; |
1da177e4 LT |
615 | } |
616 | ||
706546d0 | 617 | static DEFINE_PER_CPU(void *, processor_device_array); |
cd8e2b48 | 618 | |
7af8b660 | 619 | static int __cpuinit acpi_processor_start(struct acpi_device *device) |
1da177e4 | 620 | { |
4be44fcd LB |
621 | int result = 0; |
622 | acpi_status status = AE_OK; | |
623 | struct acpi_processor *pr; | |
9f1eb99c | 624 | struct sys_device *sysdev; |
1da177e4 LT |
625 | |
626 | pr = acpi_driver_data(device); | |
627 | ||
11bf04c4 | 628 | result = acpi_processor_get_info(pr, device->flags.unique_id); |
1da177e4 LT |
629 | if (result) { |
630 | /* Processor is physically not present */ | |
d550d98d | 631 | return 0; |
1da177e4 LT |
632 | } |
633 | ||
fbb43ab0 | 634 | BUG_ON((pr->id >= nr_cpu_ids) || (pr->id < 0)); |
1da177e4 | 635 | |
cd8e2b48 VP |
636 | /* |
637 | * Buggy BIOS check | |
638 | * ACPI id of processors can be reported wrongly by the BIOS. | |
639 | * Don't trust it blindly | |
640 | */ | |
706546d0 MT |
641 | if (per_cpu(processor_device_array, pr->id) != NULL && |
642 | per_cpu(processor_device_array, pr->id) != device) { | |
4fdb2a05 | 643 | printk(KERN_WARNING "BIOS reported wrong ACPI id " |
0eacee58 | 644 | "for the processor\n"); |
d550d98d | 645 | return -ENODEV; |
cd8e2b48 | 646 | } |
706546d0 | 647 | per_cpu(processor_device_array, pr->id) = device; |
cd8e2b48 | 648 | |
706546d0 | 649 | per_cpu(processors, pr->id) = pr; |
1da177e4 LT |
650 | |
651 | result = acpi_processor_add_fs(device); | |
652 | if (result) | |
653 | goto end; | |
654 | ||
9f1eb99c ZR |
655 | sysdev = get_cpu_sysdev(pr->id); |
656 | if (sysfs_create_link(&device->dev.kobj, &sysdev->kobj, "sysdev")) | |
657 | return -EFAULT; | |
658 | ||
1da177e4 | 659 | status = acpi_install_notify_handler(pr->handle, ACPI_DEVICE_NOTIFY, |
4be44fcd | 660 | acpi_processor_notify, pr); |
1da177e4 | 661 | |
05131ecc VP |
662 | /* _PDC call should be done before doing anything else (if reqd.). */ |
663 | arch_acpi_processor_init_pdc(pr); | |
664 | acpi_processor_set_pdc(pr); | |
0ac3c571 ZY |
665 | #ifdef CONFIG_CPU_FREQ |
666 | acpi_processor_ppc_has_changed(pr); | |
667 | #endif | |
668 | acpi_processor_get_throttling_info(pr); | |
669 | acpi_processor_get_limit_info(pr); | |
670 | ||
05131ecc | 671 | |
1da177e4 LT |
672 | acpi_processor_power_init(pr, device); |
673 | ||
d9460fd2 ZR |
674 | pr->cdev = thermal_cooling_device_register("Processor", device, |
675 | &processor_cooling_ops); | |
d76628c6 TS |
676 | if (IS_ERR(pr->cdev)) { |
677 | result = PTR_ERR(pr->cdev); | |
678 | goto end; | |
679 | } | |
9030062f JL |
680 | |
681 | printk(KERN_INFO PREFIX | |
682 | "%s is registered as cooling_device%d\n", | |
683 | device->dev.bus_id, pr->cdev->id); | |
684 | ||
685 | result = sysfs_create_link(&device->dev.kobj, | |
686 | &pr->cdev->device.kobj, | |
687 | "thermal_cooling"); | |
688 | if (result) | |
689 | printk(KERN_ERR PREFIX "Create sysfs link\n"); | |
690 | result = sysfs_create_link(&pr->cdev->device.kobj, | |
691 | &device->dev.kobj, | |
692 | "device"); | |
693 | if (result) | |
694 | printk(KERN_ERR PREFIX "Create sysfs link\n"); | |
d9460fd2 | 695 | |
1da177e4 LT |
696 | if (pr->flags.throttling) { |
697 | printk(KERN_INFO PREFIX "%s [%s] (supports", | |
4be44fcd | 698 | acpi_device_name(device), acpi_device_bid(device)); |
1da177e4 LT |
699 | printk(" %d throttling states", pr->throttling.state_count); |
700 | printk(")\n"); | |
701 | } | |
702 | ||
4be44fcd | 703 | end: |
1da177e4 | 704 | |
d550d98d | 705 | return result; |
1da177e4 LT |
706 | } |
707 | ||
4be44fcd | 708 | static void acpi_processor_notify(acpi_handle handle, u32 event, void *data) |
1da177e4 | 709 | { |
50dd0969 | 710 | struct acpi_processor *pr = data; |
4be44fcd | 711 | struct acpi_device *device = NULL; |
e790cc8b | 712 | int saved; |
1da177e4 LT |
713 | |
714 | if (!pr) | |
d550d98d | 715 | return; |
1da177e4 LT |
716 | |
717 | if (acpi_bus_get_device(pr->handle, &device)) | |
d550d98d | 718 | return; |
1da177e4 LT |
719 | |
720 | switch (event) { | |
721 | case ACPI_PROCESSOR_NOTIFY_PERFORMANCE: | |
e790cc8b | 722 | saved = pr->performance_platform_limit; |
1da177e4 | 723 | acpi_processor_ppc_has_changed(pr); |
e790cc8b AS |
724 | if (saved == pr->performance_platform_limit) |
725 | break; | |
14e04fb3 | 726 | acpi_bus_generate_proc_event(device, event, |
4be44fcd | 727 | pr->performance_platform_limit); |
962ce8ca ZR |
728 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
729 | device->dev.bus_id, event, | |
730 | pr->performance_platform_limit); | |
1da177e4 LT |
731 | break; |
732 | case ACPI_PROCESSOR_NOTIFY_POWER: | |
733 | acpi_processor_cst_has_changed(pr); | |
14e04fb3 | 734 | acpi_bus_generate_proc_event(device, event, 0); |
962ce8ca ZR |
735 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
736 | device->dev.bus_id, event, 0); | |
1da177e4 | 737 | break; |
01854e69 LY |
738 | case ACPI_PROCESSOR_NOTIFY_THROTTLING: |
739 | acpi_processor_tstate_has_changed(pr); | |
14e04fb3 | 740 | acpi_bus_generate_proc_event(device, event, 0); |
962ce8ca ZR |
741 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
742 | device->dev.bus_id, event, 0); | |
1da177e4 LT |
743 | default: |
744 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 745 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
746 | break; |
747 | } | |
748 | ||
d550d98d | 749 | return; |
1da177e4 LT |
750 | } |
751 | ||
729c6ba3 VP |
752 | static int acpi_cpu_soft_notify(struct notifier_block *nfb, |
753 | unsigned long action, void *hcpu) | |
754 | { | |
755 | unsigned int cpu = (unsigned long)hcpu; | |
706546d0 | 756 | struct acpi_processor *pr = per_cpu(processors, cpu); |
729c6ba3 VP |
757 | |
758 | if (action == CPU_ONLINE && pr) { | |
759 | acpi_processor_ppc_has_changed(pr); | |
760 | acpi_processor_cst_has_changed(pr); | |
761 | acpi_processor_tstate_has_changed(pr); | |
762 | } | |
763 | return NOTIFY_OK; | |
764 | } | |
765 | ||
766 | static struct notifier_block acpi_cpu_notifier = | |
767 | { | |
768 | .notifier_call = acpi_cpu_soft_notify, | |
769 | }; | |
770 | ||
4be44fcd | 771 | static int acpi_processor_add(struct acpi_device *device) |
1da177e4 | 772 | { |
4be44fcd | 773 | struct acpi_processor *pr = NULL; |
1da177e4 | 774 | |
1da177e4 LT |
775 | |
776 | if (!device) | |
d550d98d | 777 | return -EINVAL; |
1da177e4 | 778 | |
36bcbec7 | 779 | pr = kzalloc(sizeof(struct acpi_processor), GFP_KERNEL); |
1da177e4 | 780 | if (!pr) |
d550d98d | 781 | return -ENOMEM; |
1da177e4 LT |
782 | |
783 | pr->handle = device->handle; | |
784 | strcpy(acpi_device_name(device), ACPI_PROCESSOR_DEVICE_NAME); | |
785 | strcpy(acpi_device_class(device), ACPI_PROCESSOR_CLASS); | |
786 | acpi_driver_data(device) = pr; | |
787 | ||
d550d98d | 788 | return 0; |
1da177e4 LT |
789 | } |
790 | ||
4be44fcd | 791 | static int acpi_processor_remove(struct acpi_device *device, int type) |
1da177e4 | 792 | { |
4be44fcd LB |
793 | acpi_status status = AE_OK; |
794 | struct acpi_processor *pr = NULL; | |
1da177e4 | 795 | |
1da177e4 LT |
796 | |
797 | if (!device || !acpi_driver_data(device)) | |
d550d98d | 798 | return -EINVAL; |
1da177e4 | 799 | |
50dd0969 | 800 | pr = acpi_driver_data(device); |
1da177e4 | 801 | |
fbb43ab0 | 802 | if (pr->id >= nr_cpu_ids) { |
1da177e4 | 803 | kfree(pr); |
d550d98d | 804 | return 0; |
1da177e4 LT |
805 | } |
806 | ||
807 | if (type == ACPI_BUS_REMOVAL_EJECT) { | |
808 | if (acpi_processor_handle_eject(pr)) | |
d550d98d | 809 | return -EINVAL; |
1da177e4 LT |
810 | } |
811 | ||
812 | acpi_processor_power_exit(pr, device); | |
813 | ||
814 | status = acpi_remove_notify_handler(pr->handle, ACPI_DEVICE_NOTIFY, | |
4be44fcd | 815 | acpi_processor_notify); |
1da177e4 | 816 | |
9f1eb99c ZR |
817 | sysfs_remove_link(&device->dev.kobj, "sysdev"); |
818 | ||
1da177e4 LT |
819 | acpi_processor_remove_fs(device); |
820 | ||
f28bb45e ZY |
821 | if (pr->cdev) { |
822 | sysfs_remove_link(&device->dev.kobj, "thermal_cooling"); | |
823 | sysfs_remove_link(&pr->cdev->device.kobj, "device"); | |
824 | thermal_cooling_device_unregister(pr->cdev); | |
825 | pr->cdev = NULL; | |
826 | } | |
d9460fd2 | 827 | |
706546d0 MT |
828 | per_cpu(processors, pr->id) = NULL; |
829 | per_cpu(processor_device_array, pr->id) = NULL; | |
1da177e4 LT |
830 | kfree(pr); |
831 | ||
d550d98d | 832 | return 0; |
1da177e4 LT |
833 | } |
834 | ||
835 | #ifdef CONFIG_ACPI_HOTPLUG_CPU | |
836 | /**************************************************************************** | |
837 | * Acpi processor hotplug support * | |
838 | ****************************************************************************/ | |
839 | ||
4be44fcd | 840 | static int is_processor_present(acpi_handle handle) |
1da177e4 | 841 | { |
4be44fcd LB |
842 | acpi_status status; |
843 | unsigned long sta = 0; | |
1da177e4 | 844 | |
1da177e4 LT |
845 | |
846 | status = acpi_evaluate_integer(handle, "_STA", NULL, &sta); | |
cfaf3747 ZR |
847 | |
848 | if (ACPI_SUCCESS(status) && (sta & ACPI_STA_DEVICE_PRESENT)) | |
849 | return 1; | |
850 | ||
d0ce46f5 ZR |
851 | /* |
852 | * _STA is mandatory for a processor that supports hot plug | |
853 | */ | |
854 | if (status == AE_NOT_FOUND) | |
855 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
856 | "Processor does not support hot plug\n")); | |
857 | else | |
858 | ACPI_EXCEPTION((AE_INFO, status, | |
859 | "Processor Device is not present")); | |
cfaf3747 | 860 | return 0; |
1da177e4 LT |
861 | } |
862 | ||
1da177e4 | 863 | static |
4be44fcd | 864 | int acpi_processor_device_add(acpi_handle handle, struct acpi_device **device) |
1da177e4 | 865 | { |
4be44fcd LB |
866 | acpi_handle phandle; |
867 | struct acpi_device *pdev; | |
868 | struct acpi_processor *pr; | |
1da177e4 | 869 | |
1da177e4 LT |
870 | |
871 | if (acpi_get_parent(handle, &phandle)) { | |
d550d98d | 872 | return -ENODEV; |
1da177e4 LT |
873 | } |
874 | ||
875 | if (acpi_bus_get_device(phandle, &pdev)) { | |
d550d98d | 876 | return -ENODEV; |
1da177e4 LT |
877 | } |
878 | ||
879 | if (acpi_bus_add(device, pdev, handle, ACPI_BUS_TYPE_PROCESSOR)) { | |
d550d98d | 880 | return -ENODEV; |
1da177e4 LT |
881 | } |
882 | ||
3fb02738 | 883 | acpi_bus_start(*device); |
1da177e4 LT |
884 | |
885 | pr = acpi_driver_data(*device); | |
886 | if (!pr) | |
d550d98d | 887 | return -ENODEV; |
1da177e4 | 888 | |
fbb43ab0 | 889 | if ((pr->id >= 0) && (pr->id < nr_cpu_ids)) { |
f883d9db | 890 | kobject_uevent(&(*device)->dev.kobj, KOBJ_ONLINE); |
1da177e4 | 891 | } |
d550d98d | 892 | return 0; |
1da177e4 LT |
893 | } |
894 | ||
b95e9e8d SR |
895 | static void __ref acpi_processor_hotplug_notify(acpi_handle handle, |
896 | u32 event, void *data) | |
1da177e4 | 897 | { |
4be44fcd LB |
898 | struct acpi_processor *pr; |
899 | struct acpi_device *device = NULL; | |
1da177e4 LT |
900 | int result; |
901 | ||
1da177e4 LT |
902 | |
903 | switch (event) { | |
904 | case ACPI_NOTIFY_BUS_CHECK: | |
905 | case ACPI_NOTIFY_DEVICE_CHECK: | |
d6f882e1 GC |
906 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
907 | "Processor driver received %s event\n", | |
4be44fcd | 908 | (event == ACPI_NOTIFY_BUS_CHECK) ? |
d6f882e1 | 909 | "ACPI_NOTIFY_BUS_CHECK" : "ACPI_NOTIFY_DEVICE_CHECK")); |
1da177e4 LT |
910 | |
911 | if (!is_processor_present(handle)) | |
912 | break; | |
913 | ||
914 | if (acpi_bus_get_device(handle, &device)) { | |
915 | result = acpi_processor_device_add(handle, &device); | |
916 | if (result) | |
6468463a LB |
917 | printk(KERN_ERR PREFIX |
918 | "Unable to add the device\n"); | |
1da177e4 LT |
919 | break; |
920 | } | |
921 | ||
922 | pr = acpi_driver_data(device); | |
923 | if (!pr) { | |
6468463a | 924 | printk(KERN_ERR PREFIX "Driver data is NULL\n"); |
1da177e4 LT |
925 | break; |
926 | } | |
927 | ||
fbb43ab0 | 928 | if (pr->id >= 0 && (pr->id < nr_cpu_ids)) { |
f883d9db | 929 | kobject_uevent(&device->dev.kobj, KOBJ_OFFLINE); |
1da177e4 LT |
930 | break; |
931 | } | |
932 | ||
933 | result = acpi_processor_start(device); | |
fbb43ab0 | 934 | if ((!result) && ((pr->id >= 0) && (pr->id < nr_cpu_ids))) { |
f883d9db | 935 | kobject_uevent(&device->dev.kobj, KOBJ_ONLINE); |
1da177e4 | 936 | } else { |
6468463a LB |
937 | printk(KERN_ERR PREFIX "Device [%s] failed to start\n", |
938 | acpi_device_bid(device)); | |
1da177e4 | 939 | } |
4be44fcd | 940 | break; |
1da177e4 | 941 | case ACPI_NOTIFY_EJECT_REQUEST: |
4be44fcd LB |
942 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
943 | "received ACPI_NOTIFY_EJECT_REQUEST\n")); | |
1da177e4 LT |
944 | |
945 | if (acpi_bus_get_device(handle, &device)) { | |
6468463a LB |
946 | printk(KERN_ERR PREFIX |
947 | "Device don't exist, dropping EJECT\n"); | |
1da177e4 LT |
948 | break; |
949 | } | |
950 | pr = acpi_driver_data(device); | |
951 | if (!pr) { | |
6468463a LB |
952 | printk(KERN_ERR PREFIX |
953 | "Driver data is NULL, dropping EJECT\n"); | |
d550d98d | 954 | return; |
1da177e4 LT |
955 | } |
956 | ||
fbb43ab0 | 957 | if ((pr->id < nr_cpu_ids) && (cpu_present(pr->id))) |
f883d9db | 958 | kobject_uevent(&device->dev.kobj, KOBJ_OFFLINE); |
1da177e4 LT |
959 | break; |
960 | default: | |
961 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 962 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
963 | break; |
964 | } | |
965 | ||
d550d98d | 966 | return; |
1da177e4 LT |
967 | } |
968 | ||
969 | static acpi_status | |
970 | processor_walk_namespace_cb(acpi_handle handle, | |
4be44fcd | 971 | u32 lvl, void *context, void **rv) |
1da177e4 | 972 | { |
4be44fcd | 973 | acpi_status status; |
1da177e4 | 974 | int *action = context; |
4be44fcd | 975 | acpi_object_type type = 0; |
1da177e4 LT |
976 | |
977 | status = acpi_get_type(handle, &type); | |
978 | if (ACPI_FAILURE(status)) | |
4be44fcd | 979 | return (AE_OK); |
1da177e4 LT |
980 | |
981 | if (type != ACPI_TYPE_PROCESSOR) | |
4be44fcd | 982 | return (AE_OK); |
1da177e4 | 983 | |
4be44fcd | 984 | switch (*action) { |
1da177e4 LT |
985 | case INSTALL_NOTIFY_HANDLER: |
986 | acpi_install_notify_handler(handle, | |
4be44fcd LB |
987 | ACPI_SYSTEM_NOTIFY, |
988 | acpi_processor_hotplug_notify, | |
989 | NULL); | |
1da177e4 LT |
990 | break; |
991 | case UNINSTALL_NOTIFY_HANDLER: | |
992 | acpi_remove_notify_handler(handle, | |
4be44fcd LB |
993 | ACPI_SYSTEM_NOTIFY, |
994 | acpi_processor_hotplug_notify); | |
1da177e4 LT |
995 | break; |
996 | default: | |
997 | break; | |
998 | } | |
999 | ||
4be44fcd | 1000 | return (AE_OK); |
1da177e4 LT |
1001 | } |
1002 | ||
4be44fcd | 1003 | static acpi_status acpi_processor_hotadd_init(acpi_handle handle, int *p_cpu) |
1da177e4 | 1004 | { |
1da177e4 LT |
1005 | |
1006 | if (!is_processor_present(handle)) { | |
d550d98d | 1007 | return AE_ERROR; |
1da177e4 LT |
1008 | } |
1009 | ||
1010 | if (acpi_map_lsapic(handle, p_cpu)) | |
d550d98d | 1011 | return AE_ERROR; |
1da177e4 LT |
1012 | |
1013 | if (arch_register_cpu(*p_cpu)) { | |
1014 | acpi_unmap_lsapic(*p_cpu); | |
d550d98d | 1015 | return AE_ERROR; |
1da177e4 LT |
1016 | } |
1017 | ||
d550d98d | 1018 | return AE_OK; |
1da177e4 LT |
1019 | } |
1020 | ||
4be44fcd | 1021 | static int acpi_processor_handle_eject(struct acpi_processor *pr) |
1da177e4 | 1022 | { |
b62b8ef9 ZR |
1023 | if (cpu_online(pr->id)) |
1024 | cpu_down(pr->id); | |
1025 | ||
1da177e4 LT |
1026 | arch_unregister_cpu(pr->id); |
1027 | acpi_unmap_lsapic(pr->id); | |
4be44fcd | 1028 | return (0); |
1da177e4 LT |
1029 | } |
1030 | #else | |
4be44fcd | 1031 | static acpi_status acpi_processor_hotadd_init(acpi_handle handle, int *p_cpu) |
1da177e4 LT |
1032 | { |
1033 | return AE_ERROR; | |
1034 | } | |
4be44fcd | 1035 | static int acpi_processor_handle_eject(struct acpi_processor *pr) |
1da177e4 | 1036 | { |
4be44fcd | 1037 | return (-EINVAL); |
1da177e4 LT |
1038 | } |
1039 | #endif | |
1040 | ||
1da177e4 LT |
1041 | static |
1042 | void acpi_processor_install_hotplug_notify(void) | |
1043 | { | |
1044 | #ifdef CONFIG_ACPI_HOTPLUG_CPU | |
1045 | int action = INSTALL_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 | register_hotcpu_notifier(&acpi_cpu_notifier); |
1da177e4 LT |
1052 | } |
1053 | ||
1da177e4 LT |
1054 | static |
1055 | void acpi_processor_uninstall_hotplug_notify(void) | |
1056 | { | |
1057 | #ifdef CONFIG_ACPI_HOTPLUG_CPU | |
1058 | int action = UNINSTALL_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 | unregister_hotcpu_notifier(&acpi_cpu_notifier); |
1da177e4 LT |
1065 | } |
1066 | ||
1067 | /* | |
1068 | * We keep the driver loaded even when ACPI is not running. | |
1069 | * This is needed for the powernow-k8 driver, that works even without | |
1070 | * ACPI, but needs symbols from this driver | |
1071 | */ | |
1072 | ||
4be44fcd | 1073 | static int __init acpi_processor_init(void) |
1da177e4 | 1074 | { |
4be44fcd | 1075 | int result = 0; |
1da177e4 | 1076 | |
1da177e4 LT |
1077 | memset(&errata, 0, sizeof(errata)); |
1078 | ||
f18c5a08 AS |
1079 | #ifdef CONFIG_SMP |
1080 | if (ACPI_FAILURE(acpi_get_table(ACPI_SIG_MADT, 0, | |
1081 | (struct acpi_table_header **)&madt))) | |
70c0846e | 1082 | madt = NULL; |
f18c5a08 AS |
1083 | #endif |
1084 | ||
1da177e4 LT |
1085 | acpi_processor_dir = proc_mkdir(ACPI_PROCESSOR_CLASS, acpi_root_dir); |
1086 | if (!acpi_processor_dir) | |
83822fc9 | 1087 | return -ENOMEM; |
1da177e4 LT |
1088 | acpi_processor_dir->owner = THIS_MODULE; |
1089 | ||
4f86d3a8 LB |
1090 | result = cpuidle_register_driver(&acpi_idle_driver); |
1091 | if (result < 0) | |
1092 | goto out_proc; | |
1093 | ||
1da177e4 | 1094 | result = acpi_bus_register_driver(&acpi_processor_driver); |
4f86d3a8 LB |
1095 | if (result < 0) |
1096 | goto out_cpuidle; | |
1da177e4 LT |
1097 | |
1098 | acpi_processor_install_hotplug_notify(); | |
1099 | ||
1100 | acpi_thermal_cpufreq_init(); | |
1101 | ||
1102 | acpi_processor_ppc_init(); | |
1103 | ||
1180509f ZY |
1104 | acpi_processor_throttling_init(); |
1105 | ||
d550d98d | 1106 | return 0; |
4f86d3a8 LB |
1107 | |
1108 | out_cpuidle: | |
1109 | cpuidle_unregister_driver(&acpi_idle_driver); | |
1110 | ||
1111 | out_proc: | |
1112 | remove_proc_entry(ACPI_PROCESSOR_CLASS, acpi_root_dir); | |
1113 | ||
1114 | return result; | |
1da177e4 LT |
1115 | } |
1116 | ||
4be44fcd | 1117 | static void __exit acpi_processor_exit(void) |
1da177e4 | 1118 | { |
1da177e4 LT |
1119 | acpi_processor_ppc_exit(); |
1120 | ||
1121 | acpi_thermal_cpufreq_exit(); | |
1122 | ||
1123 | acpi_processor_uninstall_hotplug_notify(); | |
1124 | ||
1125 | acpi_bus_unregister_driver(&acpi_processor_driver); | |
1126 | ||
4f86d3a8 LB |
1127 | cpuidle_unregister_driver(&acpi_idle_driver); |
1128 | ||
1da177e4 LT |
1129 | remove_proc_entry(ACPI_PROCESSOR_CLASS, acpi_root_dir); |
1130 | ||
d550d98d | 1131 | return; |
1da177e4 LT |
1132 | } |
1133 | ||
1da177e4 LT |
1134 | module_init(acpi_processor_init); |
1135 | module_exit(acpi_processor_exit); | |
1136 | ||
1137 | EXPORT_SYMBOL(acpi_processor_set_thermal_limit); | |
1138 | ||
1139 | MODULE_ALIAS("processor"); |