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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; |
2a2a6471 ZY |
123 | static int set_no_mwait(const struct dmi_system_id *id) |
124 | { | |
125 | printk(KERN_NOTICE PREFIX "%s detected - " | |
d0057413 | 126 | "disabling mwait for CPU C-states\n", id->ident); |
2a2a6471 ZY |
127 | idle_nomwait = 1; |
128 | return 0; | |
129 | } | |
130 | ||
131 | static struct dmi_system_id __cpuinitdata processor_idle_dmi_table[] = { | |
132 | { | |
133 | set_no_mwait, "IFL91 board", { | |
134 | DMI_MATCH(DMI_BIOS_VENDOR, "COMPAL"), | |
135 | DMI_MATCH(DMI_SYS_VENDOR, "ZEPTO"), | |
136 | DMI_MATCH(DMI_PRODUCT_VERSION, "3215W"), | |
137 | DMI_MATCH(DMI_BOARD_NAME, "IFL91") }, NULL}, | |
138 | { | |
139 | set_no_mwait, "Extensa 5220", { | |
140 | DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies LTD"), | |
3df8a905 | 141 | DMI_MATCH(DMI_SYS_VENDOR, "Acer"), |
2a2a6471 ZY |
142 | DMI_MATCH(DMI_PRODUCT_VERSION, "0100"), |
143 | DMI_MATCH(DMI_BOARD_NAME, "Columbia") }, NULL}, | |
144 | {}, | |
145 | }; | |
1da177e4 | 146 | |
1da177e4 LT |
147 | /* -------------------------------------------------------------------------- |
148 | Errata Handling | |
149 | -------------------------------------------------------------------------- */ | |
150 | ||
4be44fcd | 151 | static int acpi_processor_errata_piix4(struct pci_dev *dev) |
1da177e4 | 152 | { |
4be44fcd LB |
153 | u8 value1 = 0; |
154 | u8 value2 = 0; | |
1da177e4 | 155 | |
1da177e4 LT |
156 | |
157 | if (!dev) | |
d550d98d | 158 | return -EINVAL; |
1da177e4 LT |
159 | |
160 | /* | |
161 | * Note that 'dev' references the PIIX4 ACPI Controller. | |
162 | */ | |
163 | ||
44c10138 | 164 | switch (dev->revision) { |
1da177e4 LT |
165 | case 0: |
166 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found PIIX4 A-step\n")); | |
167 | break; | |
168 | case 1: | |
169 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found PIIX4 B-step\n")); | |
170 | break; | |
171 | case 2: | |
172 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found PIIX4E\n")); | |
173 | break; | |
174 | case 3: | |
175 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found PIIX4M\n")); | |
176 | break; | |
177 | default: | |
178 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found unknown PIIX4\n")); | |
179 | break; | |
180 | } | |
181 | ||
44c10138 | 182 | switch (dev->revision) { |
1da177e4 LT |
183 | |
184 | case 0: /* PIIX4 A-step */ | |
185 | case 1: /* PIIX4 B-step */ | |
186 | /* | |
187 | * See specification changes #13 ("Manual Throttle Duty Cycle") | |
188 | * and #14 ("Enabling and Disabling Manual Throttle"), plus | |
189 | * erratum #5 ("STPCLK# Deassertion Time") from the January | |
190 | * 2002 PIIX4 specification update. Applies to only older | |
191 | * PIIX4 models. | |
192 | */ | |
193 | errata.piix4.throttle = 1; | |
194 | ||
195 | case 2: /* PIIX4E */ | |
196 | case 3: /* PIIX4M */ | |
197 | /* | |
198 | * See erratum #18 ("C3 Power State/BMIDE and Type-F DMA | |
199 | * Livelock") from the January 2002 PIIX4 specification update. | |
200 | * Applies to all PIIX4 models. | |
201 | */ | |
202 | ||
203 | /* | |
204 | * BM-IDE | |
205 | * ------ | |
206 | * Find the PIIX4 IDE Controller and get the Bus Master IDE | |
207 | * Status register address. We'll use this later to read | |
208 | * each IDE controller's DMA status to make sure we catch all | |
209 | * DMA activity. | |
210 | */ | |
211 | dev = pci_get_subsys(PCI_VENDOR_ID_INTEL, | |
4be44fcd LB |
212 | PCI_DEVICE_ID_INTEL_82371AB, |
213 | PCI_ANY_ID, PCI_ANY_ID, NULL); | |
1da177e4 LT |
214 | if (dev) { |
215 | errata.piix4.bmisx = pci_resource_start(dev, 4); | |
216 | pci_dev_put(dev); | |
217 | } | |
218 | ||
219 | /* | |
220 | * Type-F DMA | |
221 | * ---------- | |
222 | * Find the PIIX4 ISA Controller and read the Motherboard | |
223 | * DMA controller's status to see if Type-F (Fast) DMA mode | |
224 | * is enabled (bit 7) on either channel. Note that we'll | |
225 | * disable C3 support if this is enabled, as some legacy | |
226 | * devices won't operate well if fast DMA is disabled. | |
227 | */ | |
228 | dev = pci_get_subsys(PCI_VENDOR_ID_INTEL, | |
4be44fcd LB |
229 | PCI_DEVICE_ID_INTEL_82371AB_0, |
230 | PCI_ANY_ID, PCI_ANY_ID, NULL); | |
1da177e4 LT |
231 | if (dev) { |
232 | pci_read_config_byte(dev, 0x76, &value1); | |
233 | pci_read_config_byte(dev, 0x77, &value2); | |
234 | if ((value1 & 0x80) || (value2 & 0x80)) | |
235 | errata.piix4.fdma = 1; | |
236 | pci_dev_put(dev); | |
237 | } | |
238 | ||
239 | break; | |
240 | } | |
241 | ||
242 | if (errata.piix4.bmisx) | |
243 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 244 | "Bus master activity detection (BM-IDE) erratum enabled\n")); |
1da177e4 LT |
245 | if (errata.piix4.fdma) |
246 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 247 | "Type-F DMA livelock erratum (C3 disabled)\n")); |
1da177e4 | 248 | |
d550d98d | 249 | return 0; |
1da177e4 LT |
250 | } |
251 | ||
8713cbef | 252 | static int acpi_processor_errata(struct acpi_processor *pr) |
1da177e4 | 253 | { |
4be44fcd LB |
254 | int result = 0; |
255 | struct pci_dev *dev = NULL; | |
1da177e4 | 256 | |
1da177e4 LT |
257 | |
258 | if (!pr) | |
d550d98d | 259 | return -EINVAL; |
1da177e4 LT |
260 | |
261 | /* | |
262 | * PIIX4 | |
263 | */ | |
264 | dev = pci_get_subsys(PCI_VENDOR_ID_INTEL, | |
4be44fcd LB |
265 | PCI_DEVICE_ID_INTEL_82371AB_3, PCI_ANY_ID, |
266 | PCI_ANY_ID, NULL); | |
1da177e4 LT |
267 | if (dev) { |
268 | result = acpi_processor_errata_piix4(dev); | |
269 | pci_dev_put(dev); | |
270 | } | |
271 | ||
d550d98d | 272 | return result; |
1da177e4 LT |
273 | } |
274 | ||
02df8b93 | 275 | /* -------------------------------------------------------------------------- |
0b28002f | 276 | Common ACPI processor functions |
02df8b93 VP |
277 | -------------------------------------------------------------------------- */ |
278 | ||
279 | /* | |
280 | * _PDC is required for a BIOS-OS handshake for most of the newer | |
281 | * ACPI processor features. | |
282 | */ | |
05131ecc | 283 | static int acpi_processor_set_pdc(struct acpi_processor *pr) |
02df8b93 | 284 | { |
05131ecc | 285 | struct acpi_object_list *pdc_in = pr->pdc; |
4be44fcd | 286 | acpi_status status = AE_OK; |
02df8b93 | 287 | |
02df8b93 | 288 | |
05131ecc | 289 | if (!pdc_in) |
d550d98d | 290 | return status; |
da5e09a1 ZY |
291 | if (idle_nomwait) { |
292 | /* | |
293 | * If mwait is disabled for CPU C-states, the C2C3_FFH access | |
294 | * mode will be disabled in the parameter of _PDC object. | |
295 | * Of course C1_FFH access mode will also be disabled. | |
296 | */ | |
297 | union acpi_object *obj; | |
298 | u32 *buffer = NULL; | |
02df8b93 | 299 | |
da5e09a1 ZY |
300 | obj = pdc_in->pointer; |
301 | buffer = (u32 *)(obj->buffer.pointer); | |
302 | buffer[2] &= ~(ACPI_PDC_C_C2C3_FFH | ACPI_PDC_C_C1_FFH); | |
303 | ||
304 | } | |
05131ecc | 305 | status = acpi_evaluate_object(pr->handle, "_PDC", pdc_in, NULL); |
02df8b93 | 306 | |
05131ecc | 307 | if (ACPI_FAILURE(status)) |
4be44fcd | 308 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
05131ecc | 309 | "Could not evaluate _PDC, using legacy perf. control...\n")); |
02df8b93 | 310 | |
d550d98d | 311 | return status; |
02df8b93 VP |
312 | } |
313 | ||
1da177e4 LT |
314 | /* -------------------------------------------------------------------------- |
315 | FS Interface (/proc) | |
316 | -------------------------------------------------------------------------- */ | |
317 | ||
4be44fcd | 318 | static struct proc_dir_entry *acpi_processor_dir = NULL; |
1da177e4 LT |
319 | |
320 | static int acpi_processor_info_seq_show(struct seq_file *seq, void *offset) | |
321 | { | |
50dd0969 | 322 | struct acpi_processor *pr = seq->private; |
1da177e4 | 323 | |
1da177e4 LT |
324 | |
325 | if (!pr) | |
326 | goto end; | |
327 | ||
328 | seq_printf(seq, "processor id: %d\n" | |
4be44fcd LB |
329 | "acpi id: %d\n" |
330 | "bus mastering control: %s\n" | |
331 | "power management: %s\n" | |
332 | "throttling control: %s\n" | |
333 | "limit interface: %s\n", | |
334 | pr->id, | |
335 | pr->acpi_id, | |
336 | pr->flags.bm_control ? "yes" : "no", | |
337 | pr->flags.power ? "yes" : "no", | |
338 | pr->flags.throttling ? "yes" : "no", | |
339 | pr->flags.limit ? "yes" : "no"); | |
340 | ||
341 | end: | |
d550d98d | 342 | return 0; |
1da177e4 LT |
343 | } |
344 | ||
345 | static int acpi_processor_info_open_fs(struct inode *inode, struct file *file) | |
346 | { | |
347 | return single_open(file, acpi_processor_info_seq_show, | |
4be44fcd | 348 | PDE(inode)->data); |
1da177e4 LT |
349 | } |
350 | ||
4be44fcd | 351 | static int acpi_processor_add_fs(struct acpi_device *device) |
1da177e4 | 352 | { |
4be44fcd | 353 | struct proc_dir_entry *entry = NULL; |
1da177e4 | 354 | |
1da177e4 LT |
355 | |
356 | if (!acpi_device_dir(device)) { | |
357 | acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), | |
4be44fcd | 358 | acpi_processor_dir); |
1da177e4 | 359 | if (!acpi_device_dir(device)) |
d550d98d | 360 | return -ENODEV; |
1da177e4 LT |
361 | } |
362 | acpi_device_dir(device)->owner = THIS_MODULE; | |
363 | ||
364 | /* 'info' [R] */ | |
cf7acfab DL |
365 | entry = proc_create_data(ACPI_PROCESSOR_FILE_INFO, |
366 | S_IRUGO, acpi_device_dir(device), | |
367 | &acpi_processor_info_fops, | |
368 | acpi_driver_data(device)); | |
1da177e4 | 369 | if (!entry) |
d550d98d | 370 | return -EIO; |
1da177e4 LT |
371 | |
372 | /* 'throttling' [R/W] */ | |
cf7acfab DL |
373 | entry = proc_create_data(ACPI_PROCESSOR_FILE_THROTTLING, |
374 | S_IFREG | S_IRUGO | S_IWUSR, | |
375 | acpi_device_dir(device), | |
376 | &acpi_processor_throttling_fops, | |
377 | acpi_driver_data(device)); | |
1da177e4 | 378 | if (!entry) |
d550d98d | 379 | return -EIO; |
1da177e4 LT |
380 | |
381 | /* 'limit' [R/W] */ | |
cf7acfab DL |
382 | entry = proc_create_data(ACPI_PROCESSOR_FILE_LIMIT, |
383 | S_IFREG | S_IRUGO | S_IWUSR, | |
384 | acpi_device_dir(device), | |
385 | &acpi_processor_limit_fops, | |
386 | acpi_driver_data(device)); | |
1da177e4 | 387 | if (!entry) |
d550d98d | 388 | return -EIO; |
d550d98d | 389 | return 0; |
1da177e4 LT |
390 | } |
391 | ||
4be44fcd | 392 | static int acpi_processor_remove_fs(struct acpi_device *device) |
1da177e4 | 393 | { |
1da177e4 LT |
394 | |
395 | if (acpi_device_dir(device)) { | |
4be44fcd LB |
396 | remove_proc_entry(ACPI_PROCESSOR_FILE_INFO, |
397 | acpi_device_dir(device)); | |
1da177e4 | 398 | remove_proc_entry(ACPI_PROCESSOR_FILE_THROTTLING, |
4be44fcd LB |
399 | acpi_device_dir(device)); |
400 | remove_proc_entry(ACPI_PROCESSOR_FILE_LIMIT, | |
401 | acpi_device_dir(device)); | |
1da177e4 LT |
402 | remove_proc_entry(acpi_device_bid(device), acpi_processor_dir); |
403 | acpi_device_dir(device) = NULL; | |
404 | } | |
405 | ||
d550d98d | 406 | return 0; |
1da177e4 LT |
407 | } |
408 | ||
409 | /* Use the acpiid in MADT to map cpus in case of SMP */ | |
f18c5a08 | 410 | |
1da177e4 | 411 | #ifndef CONFIG_SMP |
11bf04c4 | 412 | static int get_cpu_id(acpi_handle handle, u32 acpi_id) {return -1;} |
1da177e4 LT |
413 | #else |
414 | ||
f18c5a08 AS |
415 | static struct acpi_table_madt *madt; |
416 | ||
417 | static int map_lapic_id(struct acpi_subtable_header *entry, | |
418 | u32 acpi_id, int *apic_id) | |
419 | { | |
420 | struct acpi_madt_local_apic *lapic = | |
421 | (struct acpi_madt_local_apic *)entry; | |
422 | if ((lapic->lapic_flags & ACPI_MADT_ENABLED) && | |
423 | lapic->processor_id == acpi_id) { | |
424 | *apic_id = lapic->id; | |
425 | return 1; | |
426 | } | |
427 | return 0; | |
428 | } | |
429 | ||
430 | static int map_lsapic_id(struct acpi_subtable_header *entry, | |
431 | u32 acpi_id, int *apic_id) | |
432 | { | |
433 | struct acpi_madt_local_sapic *lsapic = | |
434 | (struct acpi_madt_local_sapic *)entry; | |
435 | /* Only check enabled APICs*/ | |
436 | if (lsapic->lapic_flags & ACPI_MADT_ENABLED) { | |
437 | /* First check against id */ | |
438 | if (lsapic->processor_id == acpi_id) { | |
615d5f23 | 439 | *apic_id = (lsapic->id << 8) | lsapic->eid; |
f18c5a08 AS |
440 | return 1; |
441 | /* Check against optional uid */ | |
442 | } else if (entry->length >= 16 && | |
443 | lsapic->uid == acpi_id) { | |
444 | *apic_id = lsapic->uid; | |
445 | return 1; | |
446 | } | |
447 | } | |
448 | return 0; | |
449 | } | |
450 | ||
f18c5a08 AS |
451 | static int map_madt_entry(u32 acpi_id) |
452 | { | |
453 | unsigned long madt_end, entry; | |
454 | int apic_id = -1; | |
455 | ||
456 | if (!madt) | |
457 | return apic_id; | |
458 | ||
459 | entry = (unsigned long)madt; | |
460 | madt_end = entry + madt->header.length; | |
461 | ||
462 | /* Parse all entries looking for a match. */ | |
463 | ||
464 | entry += sizeof(struct acpi_table_madt); | |
465 | while (entry + sizeof(struct acpi_subtable_header) < madt_end) { | |
466 | struct acpi_subtable_header *header = | |
467 | (struct acpi_subtable_header *)entry; | |
468 | if (header->type == ACPI_MADT_TYPE_LOCAL_APIC) { | |
469 | if (map_lapic_id(header, acpi_id, &apic_id)) | |
470 | break; | |
471 | } else if (header->type == ACPI_MADT_TYPE_LOCAL_SAPIC) { | |
472 | if (map_lsapic_id(header, acpi_id, &apic_id)) | |
473 | break; | |
474 | } | |
475 | entry += header->length; | |
476 | } | |
477 | return apic_id; | |
478 | } | |
479 | ||
480 | static int map_mat_entry(acpi_handle handle, u32 acpi_id) | |
481 | { | |
482 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
483 | union acpi_object *obj; | |
484 | struct acpi_subtable_header *header; | |
485 | int apic_id = -1; | |
486 | ||
487 | if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer))) | |
488 | goto exit; | |
489 | ||
490 | if (!buffer.length || !buffer.pointer) | |
491 | goto exit; | |
492 | ||
493 | obj = buffer.pointer; | |
494 | if (obj->type != ACPI_TYPE_BUFFER || | |
495 | obj->buffer.length < sizeof(struct acpi_subtable_header)) { | |
496 | goto exit; | |
497 | } | |
498 | ||
499 | header = (struct acpi_subtable_header *)obj->buffer.pointer; | |
500 | if (header->type == ACPI_MADT_TYPE_LOCAL_APIC) { | |
501 | map_lapic_id(header, acpi_id, &apic_id); | |
502 | } else if (header->type == ACPI_MADT_TYPE_LOCAL_SAPIC) { | |
503 | map_lsapic_id(header, acpi_id, &apic_id); | |
504 | } | |
505 | ||
506 | exit: | |
507 | if (buffer.pointer) | |
508 | kfree(buffer.pointer); | |
509 | return apic_id; | |
510 | } | |
511 | ||
11bf04c4 | 512 | static int get_cpu_id(acpi_handle handle, u32 acpi_id) |
1da177e4 | 513 | { |
4a35a46b | 514 | int i; |
f18c5a08 | 515 | int apic_id = -1; |
1da177e4 | 516 | |
f18c5a08 AS |
517 | apic_id = map_mat_entry(handle, acpi_id); |
518 | if (apic_id == -1) | |
519 | apic_id = map_madt_entry(acpi_id); | |
520 | if (apic_id == -1) | |
521 | return apic_id; | |
1da177e4 | 522 | |
fbb43ab0 | 523 | for_each_possible_cpu(i) { |
71b31233 | 524 | if (cpu_physical_id(i) == apic_id) |
4a35a46b | 525 | return i; |
1da177e4 LT |
526 | } |
527 | return -1; | |
528 | } | |
529 | #endif | |
530 | ||
531 | /* -------------------------------------------------------------------------- | |
532 | Driver Interface | |
533 | -------------------------------------------------------------------------- */ | |
534 | ||
11bf04c4 | 535 | static int acpi_processor_get_info(struct acpi_processor *pr, unsigned has_uid) |
1da177e4 | 536 | { |
4be44fcd LB |
537 | acpi_status status = 0; |
538 | union acpi_object object = { 0 }; | |
539 | struct acpi_buffer buffer = { sizeof(union acpi_object), &object }; | |
df42baa0 | 540 | int cpu_index; |
4be44fcd | 541 | static int cpu0_initialized; |
1da177e4 | 542 | |
1da177e4 LT |
543 | |
544 | if (!pr) | |
d550d98d | 545 | return -EINVAL; |
1da177e4 LT |
546 | |
547 | if (num_online_cpus() > 1) | |
548 | errata.smp = TRUE; | |
549 | ||
550 | acpi_processor_errata(pr); | |
551 | ||
552 | /* | |
553 | * Check to see if we have bus mastering arbitration control. This | |
554 | * is required for proper C3 usage (to maintain cache coherency). | |
555 | */ | |
cee324b1 | 556 | if (acpi_gbl_FADT.pm2_control_block && acpi_gbl_FADT.pm2_control_length) { |
1da177e4 LT |
557 | pr->flags.bm_control = 1; |
558 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd LB |
559 | "Bus mastering arbitration control present\n")); |
560 | } else | |
1da177e4 | 561 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
4be44fcd | 562 | "No bus mastering arbitration control\n")); |
1da177e4 | 563 | |
11bf04c4 AS |
564 | /* Check if it is a Device with HID and UID */ |
565 | if (has_uid) { | |
566 | unsigned long value; | |
567 | status = acpi_evaluate_integer(pr->handle, METHOD_NAME__UID, | |
568 | NULL, &value); | |
569 | if (ACPI_FAILURE(status)) { | |
570 | printk(KERN_ERR PREFIX "Evaluating processor _UID\n"); | |
571 | return -ENODEV; | |
572 | } | |
573 | pr->acpi_id = value; | |
574 | } else { | |
575 | /* | |
576 | * Evalute the processor object. Note that it is common on SMP to | |
577 | * have the first (boot) processor with a valid PBLK address while | |
578 | * all others have a NULL address. | |
579 | */ | |
580 | status = acpi_evaluate_object(pr->handle, NULL, NULL, &buffer); | |
581 | if (ACPI_FAILURE(status)) { | |
582 | printk(KERN_ERR PREFIX "Evaluating processor object\n"); | |
583 | return -ENODEV; | |
584 | } | |
1da177e4 | 585 | |
11bf04c4 AS |
586 | /* |
587 | * TBD: Synch processor ID (via LAPIC/LSAPIC structures) on SMP. | |
588 | * >>> 'acpi_get_processor_id(acpi_id, &id)' in arch/xxx/acpi.c | |
589 | */ | |
590 | pr->acpi_id = object.processor.proc_id; | |
591 | } | |
592 | cpu_index = get_cpu_id(pr->handle, pr->acpi_id); | |
1da177e4 | 593 | |
4be44fcd | 594 | /* Handle UP system running SMP kernel, with no LAPIC in MADT */ |
df42baa0 | 595 | if (!cpu0_initialized && (cpu_index == -1) && |
4be44fcd LB |
596 | (num_online_cpus() == 1)) { |
597 | cpu_index = 0; | |
598 | } | |
599 | ||
600 | cpu0_initialized = 1; | |
601 | ||
602 | pr->id = cpu_index; | |
603 | ||
604 | /* | |
605 | * Extra Processor objects may be enumerated on MP systems with | |
606 | * less than the max # of CPUs. They should be ignored _iff | |
607 | * they are physically not present. | |
608 | */ | |
f18c5a08 | 609 | if (pr->id == -1) { |
4be44fcd LB |
610 | if (ACPI_FAILURE |
611 | (acpi_processor_hotadd_init(pr->handle, &pr->id))) { | |
d550d98d | 612 | return -ENODEV; |
4be44fcd LB |
613 | } |
614 | } | |
1da177e4 LT |
615 | |
616 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Processor [%d:%d]\n", pr->id, | |
4be44fcd | 617 | pr->acpi_id)); |
1da177e4 LT |
618 | |
619 | if (!object.processor.pblk_address) | |
620 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No PBLK (NULL address)\n")); | |
621 | else if (object.processor.pblk_length != 6) | |
6468463a LB |
622 | printk(KERN_ERR PREFIX "Invalid PBLK length [%d]\n", |
623 | object.processor.pblk_length); | |
1da177e4 LT |
624 | else { |
625 | pr->throttling.address = object.processor.pblk_address; | |
cee324b1 AS |
626 | pr->throttling.duty_offset = acpi_gbl_FADT.duty_offset; |
627 | pr->throttling.duty_width = acpi_gbl_FADT.duty_width; | |
1da177e4 LT |
628 | |
629 | pr->pblk = object.processor.pblk_address; | |
630 | ||
631 | /* | |
632 | * We don't care about error returns - we just try to mark | |
633 | * these reserved so that nobody else is confused into thinking | |
634 | * that this region might be unused.. | |
635 | * | |
636 | * (In particular, allocating the IO range for Cardbus) | |
637 | */ | |
638 | request_region(pr->throttling.address, 6, "ACPI CPU throttle"); | |
639 | } | |
640 | ||
fe086a7b AC |
641 | /* |
642 | * If ACPI describes a slot number for this CPU, we can use it | |
643 | * ensure we get the right value in the "physical id" field | |
644 | * of /proc/cpuinfo | |
645 | */ | |
646 | status = acpi_evaluate_object(pr->handle, "_SUN", NULL, &buffer); | |
647 | if (ACPI_SUCCESS(status)) | |
648 | arch_fix_phys_package_id(pr->id, object.integer.value); | |
649 | ||
d550d98d | 650 | return 0; |
1da177e4 LT |
651 | } |
652 | ||
706546d0 | 653 | static DEFINE_PER_CPU(void *, processor_device_array); |
cd8e2b48 | 654 | |
7af8b660 | 655 | static int __cpuinit acpi_processor_start(struct acpi_device *device) |
1da177e4 | 656 | { |
4be44fcd LB |
657 | int result = 0; |
658 | acpi_status status = AE_OK; | |
659 | struct acpi_processor *pr; | |
9f1eb99c | 660 | struct sys_device *sysdev; |
1da177e4 LT |
661 | |
662 | pr = acpi_driver_data(device); | |
663 | ||
11bf04c4 | 664 | result = acpi_processor_get_info(pr, device->flags.unique_id); |
1da177e4 LT |
665 | if (result) { |
666 | /* Processor is physically not present */ | |
d550d98d | 667 | return 0; |
1da177e4 LT |
668 | } |
669 | ||
fbb43ab0 | 670 | BUG_ON((pr->id >= nr_cpu_ids) || (pr->id < 0)); |
1da177e4 | 671 | |
cd8e2b48 VP |
672 | /* |
673 | * Buggy BIOS check | |
674 | * ACPI id of processors can be reported wrongly by the BIOS. | |
675 | * Don't trust it blindly | |
676 | */ | |
706546d0 MT |
677 | if (per_cpu(processor_device_array, pr->id) != NULL && |
678 | per_cpu(processor_device_array, pr->id) != device) { | |
4fdb2a05 | 679 | printk(KERN_WARNING "BIOS reported wrong ACPI id " |
0eacee58 | 680 | "for the processor\n"); |
d550d98d | 681 | return -ENODEV; |
cd8e2b48 | 682 | } |
706546d0 | 683 | per_cpu(processor_device_array, pr->id) = device; |
cd8e2b48 | 684 | |
706546d0 | 685 | per_cpu(processors, pr->id) = pr; |
1da177e4 LT |
686 | |
687 | result = acpi_processor_add_fs(device); | |
688 | if (result) | |
689 | goto end; | |
690 | ||
9f1eb99c ZR |
691 | sysdev = get_cpu_sysdev(pr->id); |
692 | if (sysfs_create_link(&device->dev.kobj, &sysdev->kobj, "sysdev")) | |
693 | return -EFAULT; | |
694 | ||
1da177e4 | 695 | status = acpi_install_notify_handler(pr->handle, ACPI_DEVICE_NOTIFY, |
4be44fcd | 696 | acpi_processor_notify, pr); |
1da177e4 | 697 | |
05131ecc VP |
698 | /* _PDC call should be done before doing anything else (if reqd.). */ |
699 | arch_acpi_processor_init_pdc(pr); | |
700 | acpi_processor_set_pdc(pr); | |
0ac3c571 ZY |
701 | #ifdef CONFIG_CPU_FREQ |
702 | acpi_processor_ppc_has_changed(pr); | |
703 | #endif | |
704 | acpi_processor_get_throttling_info(pr); | |
705 | acpi_processor_get_limit_info(pr); | |
706 | ||
05131ecc | 707 | |
1da177e4 LT |
708 | acpi_processor_power_init(pr, device); |
709 | ||
d9460fd2 ZR |
710 | pr->cdev = thermal_cooling_device_register("Processor", device, |
711 | &processor_cooling_ops); | |
d76628c6 TS |
712 | if (IS_ERR(pr->cdev)) { |
713 | result = PTR_ERR(pr->cdev); | |
714 | goto end; | |
715 | } | |
9030062f | 716 | |
fc3a8828 GKH |
717 | dev_info(&device->dev, "registered as cooling_device%d\n", |
718 | pr->cdev->id); | |
9030062f JL |
719 | |
720 | result = sysfs_create_link(&device->dev.kobj, | |
721 | &pr->cdev->device.kobj, | |
722 | "thermal_cooling"); | |
723 | if (result) | |
724 | printk(KERN_ERR PREFIX "Create sysfs link\n"); | |
725 | result = sysfs_create_link(&pr->cdev->device.kobj, | |
726 | &device->dev.kobj, | |
727 | "device"); | |
728 | if (result) | |
729 | printk(KERN_ERR PREFIX "Create sysfs link\n"); | |
d9460fd2 | 730 | |
1da177e4 LT |
731 | if (pr->flags.throttling) { |
732 | printk(KERN_INFO PREFIX "%s [%s] (supports", | |
4be44fcd | 733 | acpi_device_name(device), acpi_device_bid(device)); |
1da177e4 LT |
734 | printk(" %d throttling states", pr->throttling.state_count); |
735 | printk(")\n"); | |
736 | } | |
737 | ||
4be44fcd | 738 | end: |
1da177e4 | 739 | |
d550d98d | 740 | return result; |
1da177e4 LT |
741 | } |
742 | ||
4be44fcd | 743 | static void acpi_processor_notify(acpi_handle handle, u32 event, void *data) |
1da177e4 | 744 | { |
50dd0969 | 745 | struct acpi_processor *pr = data; |
4be44fcd | 746 | struct acpi_device *device = NULL; |
e790cc8b | 747 | int saved; |
1da177e4 LT |
748 | |
749 | if (!pr) | |
d550d98d | 750 | return; |
1da177e4 LT |
751 | |
752 | if (acpi_bus_get_device(pr->handle, &device)) | |
d550d98d | 753 | return; |
1da177e4 LT |
754 | |
755 | switch (event) { | |
756 | case ACPI_PROCESSOR_NOTIFY_PERFORMANCE: | |
e790cc8b | 757 | saved = pr->performance_platform_limit; |
1da177e4 | 758 | acpi_processor_ppc_has_changed(pr); |
e790cc8b AS |
759 | if (saved == pr->performance_platform_limit) |
760 | break; | |
14e04fb3 | 761 | acpi_bus_generate_proc_event(device, event, |
4be44fcd | 762 | pr->performance_platform_limit); |
962ce8ca ZR |
763 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
764 | device->dev.bus_id, event, | |
765 | pr->performance_platform_limit); | |
1da177e4 LT |
766 | break; |
767 | case ACPI_PROCESSOR_NOTIFY_POWER: | |
768 | acpi_processor_cst_has_changed(pr); | |
14e04fb3 | 769 | acpi_bus_generate_proc_event(device, event, 0); |
962ce8ca ZR |
770 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
771 | device->dev.bus_id, event, 0); | |
1da177e4 | 772 | break; |
01854e69 LY |
773 | case ACPI_PROCESSOR_NOTIFY_THROTTLING: |
774 | acpi_processor_tstate_has_changed(pr); | |
14e04fb3 | 775 | acpi_bus_generate_proc_event(device, event, 0); |
962ce8ca ZR |
776 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
777 | device->dev.bus_id, event, 0); | |
1da177e4 LT |
778 | default: |
779 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 780 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
781 | break; |
782 | } | |
783 | ||
d550d98d | 784 | return; |
1da177e4 LT |
785 | } |
786 | ||
729c6ba3 VP |
787 | static int acpi_cpu_soft_notify(struct notifier_block *nfb, |
788 | unsigned long action, void *hcpu) | |
789 | { | |
790 | unsigned int cpu = (unsigned long)hcpu; | |
706546d0 | 791 | struct acpi_processor *pr = per_cpu(processors, cpu); |
729c6ba3 VP |
792 | |
793 | if (action == CPU_ONLINE && pr) { | |
794 | acpi_processor_ppc_has_changed(pr); | |
795 | acpi_processor_cst_has_changed(pr); | |
796 | acpi_processor_tstate_has_changed(pr); | |
797 | } | |
798 | return NOTIFY_OK; | |
799 | } | |
800 | ||
801 | static struct notifier_block acpi_cpu_notifier = | |
802 | { | |
803 | .notifier_call = acpi_cpu_soft_notify, | |
804 | }; | |
805 | ||
4be44fcd | 806 | static int acpi_processor_add(struct acpi_device *device) |
1da177e4 | 807 | { |
4be44fcd | 808 | struct acpi_processor *pr = NULL; |
1da177e4 | 809 | |
1da177e4 LT |
810 | |
811 | if (!device) | |
d550d98d | 812 | return -EINVAL; |
1da177e4 | 813 | |
36bcbec7 | 814 | pr = kzalloc(sizeof(struct acpi_processor), GFP_KERNEL); |
1da177e4 | 815 | if (!pr) |
d550d98d | 816 | return -ENOMEM; |
1da177e4 LT |
817 | |
818 | pr->handle = device->handle; | |
819 | strcpy(acpi_device_name(device), ACPI_PROCESSOR_DEVICE_NAME); | |
820 | strcpy(acpi_device_class(device), ACPI_PROCESSOR_CLASS); | |
db89b4f0 | 821 | device->driver_data = pr; |
1da177e4 | 822 | |
d550d98d | 823 | return 0; |
1da177e4 LT |
824 | } |
825 | ||
4be44fcd | 826 | static int acpi_processor_remove(struct acpi_device *device, int type) |
1da177e4 | 827 | { |
4be44fcd LB |
828 | acpi_status status = AE_OK; |
829 | struct acpi_processor *pr = NULL; | |
1da177e4 | 830 | |
1da177e4 LT |
831 | |
832 | if (!device || !acpi_driver_data(device)) | |
d550d98d | 833 | return -EINVAL; |
1da177e4 | 834 | |
50dd0969 | 835 | pr = acpi_driver_data(device); |
1da177e4 | 836 | |
fbb43ab0 | 837 | if (pr->id >= nr_cpu_ids) { |
1da177e4 | 838 | kfree(pr); |
d550d98d | 839 | return 0; |
1da177e4 LT |
840 | } |
841 | ||
842 | if (type == ACPI_BUS_REMOVAL_EJECT) { | |
843 | if (acpi_processor_handle_eject(pr)) | |
d550d98d | 844 | return -EINVAL; |
1da177e4 LT |
845 | } |
846 | ||
847 | acpi_processor_power_exit(pr, device); | |
848 | ||
849 | status = acpi_remove_notify_handler(pr->handle, ACPI_DEVICE_NOTIFY, | |
4be44fcd | 850 | acpi_processor_notify); |
1da177e4 | 851 | |
9f1eb99c ZR |
852 | sysfs_remove_link(&device->dev.kobj, "sysdev"); |
853 | ||
1da177e4 LT |
854 | acpi_processor_remove_fs(device); |
855 | ||
f28bb45e ZY |
856 | if (pr->cdev) { |
857 | sysfs_remove_link(&device->dev.kobj, "thermal_cooling"); | |
858 | sysfs_remove_link(&pr->cdev->device.kobj, "device"); | |
859 | thermal_cooling_device_unregister(pr->cdev); | |
860 | pr->cdev = NULL; | |
861 | } | |
d9460fd2 | 862 | |
706546d0 MT |
863 | per_cpu(processors, pr->id) = NULL; |
864 | per_cpu(processor_device_array, pr->id) = NULL; | |
1da177e4 LT |
865 | kfree(pr); |
866 | ||
d550d98d | 867 | return 0; |
1da177e4 LT |
868 | } |
869 | ||
870 | #ifdef CONFIG_ACPI_HOTPLUG_CPU | |
871 | /**************************************************************************** | |
872 | * Acpi processor hotplug support * | |
873 | ****************************************************************************/ | |
874 | ||
4be44fcd | 875 | static int is_processor_present(acpi_handle handle) |
1da177e4 | 876 | { |
4be44fcd LB |
877 | acpi_status status; |
878 | unsigned long sta = 0; | |
1da177e4 | 879 | |
1da177e4 LT |
880 | |
881 | status = acpi_evaluate_integer(handle, "_STA", NULL, &sta); | |
cfaf3747 ZR |
882 | |
883 | if (ACPI_SUCCESS(status) && (sta & ACPI_STA_DEVICE_PRESENT)) | |
884 | return 1; | |
885 | ||
d0ce46f5 ZR |
886 | /* |
887 | * _STA is mandatory for a processor that supports hot plug | |
888 | */ | |
889 | if (status == AE_NOT_FOUND) | |
890 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
891 | "Processor does not support hot plug\n")); | |
892 | else | |
893 | ACPI_EXCEPTION((AE_INFO, status, | |
894 | "Processor Device is not present")); | |
cfaf3747 | 895 | return 0; |
1da177e4 LT |
896 | } |
897 | ||
1da177e4 | 898 | static |
4be44fcd | 899 | int acpi_processor_device_add(acpi_handle handle, struct acpi_device **device) |
1da177e4 | 900 | { |
4be44fcd LB |
901 | acpi_handle phandle; |
902 | struct acpi_device *pdev; | |
903 | struct acpi_processor *pr; | |
1da177e4 | 904 | |
1da177e4 LT |
905 | |
906 | if (acpi_get_parent(handle, &phandle)) { | |
d550d98d | 907 | return -ENODEV; |
1da177e4 LT |
908 | } |
909 | ||
910 | if (acpi_bus_get_device(phandle, &pdev)) { | |
d550d98d | 911 | return -ENODEV; |
1da177e4 LT |
912 | } |
913 | ||
914 | if (acpi_bus_add(device, pdev, handle, ACPI_BUS_TYPE_PROCESSOR)) { | |
d550d98d | 915 | return -ENODEV; |
1da177e4 LT |
916 | } |
917 | ||
3fb02738 | 918 | acpi_bus_start(*device); |
1da177e4 LT |
919 | |
920 | pr = acpi_driver_data(*device); | |
921 | if (!pr) | |
d550d98d | 922 | return -ENODEV; |
1da177e4 | 923 | |
fbb43ab0 | 924 | if ((pr->id >= 0) && (pr->id < nr_cpu_ids)) { |
f883d9db | 925 | kobject_uevent(&(*device)->dev.kobj, KOBJ_ONLINE); |
1da177e4 | 926 | } |
d550d98d | 927 | return 0; |
1da177e4 LT |
928 | } |
929 | ||
b95e9e8d SR |
930 | static void __ref acpi_processor_hotplug_notify(acpi_handle handle, |
931 | u32 event, void *data) | |
1da177e4 | 932 | { |
4be44fcd LB |
933 | struct acpi_processor *pr; |
934 | struct acpi_device *device = NULL; | |
1da177e4 LT |
935 | int result; |
936 | ||
1da177e4 LT |
937 | |
938 | switch (event) { | |
939 | case ACPI_NOTIFY_BUS_CHECK: | |
940 | case ACPI_NOTIFY_DEVICE_CHECK: | |
d6f882e1 GC |
941 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
942 | "Processor driver received %s event\n", | |
4be44fcd | 943 | (event == ACPI_NOTIFY_BUS_CHECK) ? |
d6f882e1 | 944 | "ACPI_NOTIFY_BUS_CHECK" : "ACPI_NOTIFY_DEVICE_CHECK")); |
1da177e4 LT |
945 | |
946 | if (!is_processor_present(handle)) | |
947 | break; | |
948 | ||
949 | if (acpi_bus_get_device(handle, &device)) { | |
950 | result = acpi_processor_device_add(handle, &device); | |
951 | if (result) | |
6468463a LB |
952 | printk(KERN_ERR PREFIX |
953 | "Unable to add the device\n"); | |
1da177e4 LT |
954 | break; |
955 | } | |
956 | ||
957 | pr = acpi_driver_data(device); | |
958 | if (!pr) { | |
6468463a | 959 | printk(KERN_ERR PREFIX "Driver data is NULL\n"); |
1da177e4 LT |
960 | break; |
961 | } | |
962 | ||
fbb43ab0 | 963 | if (pr->id >= 0 && (pr->id < nr_cpu_ids)) { |
f883d9db | 964 | kobject_uevent(&device->dev.kobj, KOBJ_OFFLINE); |
1da177e4 LT |
965 | break; |
966 | } | |
967 | ||
968 | result = acpi_processor_start(device); | |
fbb43ab0 | 969 | if ((!result) && ((pr->id >= 0) && (pr->id < nr_cpu_ids))) { |
f883d9db | 970 | kobject_uevent(&device->dev.kobj, KOBJ_ONLINE); |
1da177e4 | 971 | } else { |
6468463a LB |
972 | printk(KERN_ERR PREFIX "Device [%s] failed to start\n", |
973 | acpi_device_bid(device)); | |
1da177e4 | 974 | } |
4be44fcd | 975 | break; |
1da177e4 | 976 | case ACPI_NOTIFY_EJECT_REQUEST: |
4be44fcd LB |
977 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
978 | "received ACPI_NOTIFY_EJECT_REQUEST\n")); | |
1da177e4 LT |
979 | |
980 | if (acpi_bus_get_device(handle, &device)) { | |
6468463a LB |
981 | printk(KERN_ERR PREFIX |
982 | "Device don't exist, dropping EJECT\n"); | |
1da177e4 LT |
983 | break; |
984 | } | |
985 | pr = acpi_driver_data(device); | |
986 | if (!pr) { | |
6468463a LB |
987 | printk(KERN_ERR PREFIX |
988 | "Driver data is NULL, dropping EJECT\n"); | |
d550d98d | 989 | return; |
1da177e4 LT |
990 | } |
991 | ||
fbb43ab0 | 992 | if ((pr->id < nr_cpu_ids) && (cpu_present(pr->id))) |
f883d9db | 993 | kobject_uevent(&device->dev.kobj, KOBJ_OFFLINE); |
1da177e4 LT |
994 | break; |
995 | default: | |
996 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 997 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
998 | break; |
999 | } | |
1000 | ||
d550d98d | 1001 | return; |
1da177e4 LT |
1002 | } |
1003 | ||
1004 | static acpi_status | |
1005 | processor_walk_namespace_cb(acpi_handle handle, | |
4be44fcd | 1006 | u32 lvl, void *context, void **rv) |
1da177e4 | 1007 | { |
4be44fcd | 1008 | acpi_status status; |
1da177e4 | 1009 | int *action = context; |
4be44fcd | 1010 | acpi_object_type type = 0; |
1da177e4 LT |
1011 | |
1012 | status = acpi_get_type(handle, &type); | |
1013 | if (ACPI_FAILURE(status)) | |
4be44fcd | 1014 | return (AE_OK); |
1da177e4 LT |
1015 | |
1016 | if (type != ACPI_TYPE_PROCESSOR) | |
4be44fcd | 1017 | return (AE_OK); |
1da177e4 | 1018 | |
4be44fcd | 1019 | switch (*action) { |
1da177e4 LT |
1020 | case INSTALL_NOTIFY_HANDLER: |
1021 | acpi_install_notify_handler(handle, | |
4be44fcd LB |
1022 | ACPI_SYSTEM_NOTIFY, |
1023 | acpi_processor_hotplug_notify, | |
1024 | NULL); | |
1da177e4 LT |
1025 | break; |
1026 | case UNINSTALL_NOTIFY_HANDLER: | |
1027 | acpi_remove_notify_handler(handle, | |
4be44fcd LB |
1028 | ACPI_SYSTEM_NOTIFY, |
1029 | acpi_processor_hotplug_notify); | |
1da177e4 LT |
1030 | break; |
1031 | default: | |
1032 | break; | |
1033 | } | |
1034 | ||
4be44fcd | 1035 | return (AE_OK); |
1da177e4 LT |
1036 | } |
1037 | ||
4be44fcd | 1038 | static acpi_status acpi_processor_hotadd_init(acpi_handle handle, int *p_cpu) |
1da177e4 | 1039 | { |
1da177e4 LT |
1040 | |
1041 | if (!is_processor_present(handle)) { | |
d550d98d | 1042 | return AE_ERROR; |
1da177e4 LT |
1043 | } |
1044 | ||
1045 | if (acpi_map_lsapic(handle, p_cpu)) | |
d550d98d | 1046 | return AE_ERROR; |
1da177e4 LT |
1047 | |
1048 | if (arch_register_cpu(*p_cpu)) { | |
1049 | acpi_unmap_lsapic(*p_cpu); | |
d550d98d | 1050 | return AE_ERROR; |
1da177e4 LT |
1051 | } |
1052 | ||
d550d98d | 1053 | return AE_OK; |
1da177e4 LT |
1054 | } |
1055 | ||
4be44fcd | 1056 | static int acpi_processor_handle_eject(struct acpi_processor *pr) |
1da177e4 | 1057 | { |
b62b8ef9 ZR |
1058 | if (cpu_online(pr->id)) |
1059 | cpu_down(pr->id); | |
1060 | ||
1da177e4 LT |
1061 | arch_unregister_cpu(pr->id); |
1062 | acpi_unmap_lsapic(pr->id); | |
4be44fcd | 1063 | return (0); |
1da177e4 LT |
1064 | } |
1065 | #else | |
4be44fcd | 1066 | static acpi_status acpi_processor_hotadd_init(acpi_handle handle, int *p_cpu) |
1da177e4 LT |
1067 | { |
1068 | return AE_ERROR; | |
1069 | } | |
4be44fcd | 1070 | static int acpi_processor_handle_eject(struct acpi_processor *pr) |
1da177e4 | 1071 | { |
4be44fcd | 1072 | return (-EINVAL); |
1da177e4 LT |
1073 | } |
1074 | #endif | |
1075 | ||
1da177e4 LT |
1076 | static |
1077 | void acpi_processor_install_hotplug_notify(void) | |
1078 | { | |
1079 | #ifdef CONFIG_ACPI_HOTPLUG_CPU | |
1080 | int action = INSTALL_NOTIFY_HANDLER; | |
1081 | acpi_walk_namespace(ACPI_TYPE_PROCESSOR, | |
4be44fcd LB |
1082 | ACPI_ROOT_OBJECT, |
1083 | ACPI_UINT32_MAX, | |
1084 | processor_walk_namespace_cb, &action, NULL); | |
1da177e4 | 1085 | #endif |
729c6ba3 | 1086 | register_hotcpu_notifier(&acpi_cpu_notifier); |
1da177e4 LT |
1087 | } |
1088 | ||
1da177e4 LT |
1089 | static |
1090 | void acpi_processor_uninstall_hotplug_notify(void) | |
1091 | { | |
1092 | #ifdef CONFIG_ACPI_HOTPLUG_CPU | |
1093 | int action = UNINSTALL_NOTIFY_HANDLER; | |
1094 | acpi_walk_namespace(ACPI_TYPE_PROCESSOR, | |
4be44fcd LB |
1095 | ACPI_ROOT_OBJECT, |
1096 | ACPI_UINT32_MAX, | |
1097 | processor_walk_namespace_cb, &action, NULL); | |
1da177e4 | 1098 | #endif |
729c6ba3 | 1099 | unregister_hotcpu_notifier(&acpi_cpu_notifier); |
1da177e4 LT |
1100 | } |
1101 | ||
1102 | /* | |
1103 | * We keep the driver loaded even when ACPI is not running. | |
1104 | * This is needed for the powernow-k8 driver, that works even without | |
1105 | * ACPI, but needs symbols from this driver | |
1106 | */ | |
1107 | ||
4be44fcd | 1108 | static int __init acpi_processor_init(void) |
1da177e4 | 1109 | { |
4be44fcd | 1110 | int result = 0; |
1da177e4 | 1111 | |
1da177e4 LT |
1112 | memset(&errata, 0, sizeof(errata)); |
1113 | ||
f18c5a08 AS |
1114 | #ifdef CONFIG_SMP |
1115 | if (ACPI_FAILURE(acpi_get_table(ACPI_SIG_MADT, 0, | |
1116 | (struct acpi_table_header **)&madt))) | |
70c0846e | 1117 | madt = NULL; |
f18c5a08 AS |
1118 | #endif |
1119 | ||
1da177e4 LT |
1120 | acpi_processor_dir = proc_mkdir(ACPI_PROCESSOR_CLASS, acpi_root_dir); |
1121 | if (!acpi_processor_dir) | |
83822fc9 | 1122 | return -ENOMEM; |
1da177e4 LT |
1123 | acpi_processor_dir->owner = THIS_MODULE; |
1124 | ||
2a2a6471 ZY |
1125 | /* |
1126 | * Check whether the system is DMI table. If yes, OSPM | |
1127 | * should not use mwait for CPU-states. | |
1128 | */ | |
1129 | dmi_check_system(processor_idle_dmi_table); | |
4f86d3a8 LB |
1130 | result = cpuidle_register_driver(&acpi_idle_driver); |
1131 | if (result < 0) | |
1132 | goto out_proc; | |
1133 | ||
1da177e4 | 1134 | result = acpi_bus_register_driver(&acpi_processor_driver); |
4f86d3a8 LB |
1135 | if (result < 0) |
1136 | goto out_cpuidle; | |
1da177e4 LT |
1137 | |
1138 | acpi_processor_install_hotplug_notify(); | |
1139 | ||
1140 | acpi_thermal_cpufreq_init(); | |
1141 | ||
1142 | acpi_processor_ppc_init(); | |
1143 | ||
1180509f ZY |
1144 | acpi_processor_throttling_init(); |
1145 | ||
d550d98d | 1146 | return 0; |
4f86d3a8 LB |
1147 | |
1148 | out_cpuidle: | |
1149 | cpuidle_unregister_driver(&acpi_idle_driver); | |
1150 | ||
1151 | out_proc: | |
1152 | remove_proc_entry(ACPI_PROCESSOR_CLASS, acpi_root_dir); | |
1153 | ||
1154 | return result; | |
1da177e4 LT |
1155 | } |
1156 | ||
4be44fcd | 1157 | static void __exit acpi_processor_exit(void) |
1da177e4 | 1158 | { |
1da177e4 LT |
1159 | acpi_processor_ppc_exit(); |
1160 | ||
1161 | acpi_thermal_cpufreq_exit(); | |
1162 | ||
1163 | acpi_processor_uninstall_hotplug_notify(); | |
1164 | ||
1165 | acpi_bus_unregister_driver(&acpi_processor_driver); | |
1166 | ||
4f86d3a8 LB |
1167 | cpuidle_unregister_driver(&acpi_idle_driver); |
1168 | ||
1da177e4 LT |
1169 | remove_proc_entry(ACPI_PROCESSOR_CLASS, acpi_root_dir); |
1170 | ||
d550d98d | 1171 | return; |
1da177e4 LT |
1172 | } |
1173 | ||
1da177e4 LT |
1174 | module_init(acpi_processor_init); |
1175 | module_exit(acpi_processor_exit); | |
1176 | ||
1177 | EXPORT_SYMBOL(acpi_processor_set_thermal_limit); | |
1178 | ||
1179 | MODULE_ALIAS("processor"); |