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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 - " | |
126 | "disable mwait for CPU C-stetes\n", id->ident); | |
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"), | |
141 | DMI_MATCH(DMI_SYS_VENDOR, "ACER"), | |
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 JL |
716 | |
717 | printk(KERN_INFO PREFIX | |
718 | "%s is registered as cooling_device%d\n", | |
719 | device->dev.bus_id, pr->cdev->id); | |
720 | ||
721 | result = sysfs_create_link(&device->dev.kobj, | |
722 | &pr->cdev->device.kobj, | |
723 | "thermal_cooling"); | |
724 | if (result) | |
725 | printk(KERN_ERR PREFIX "Create sysfs link\n"); | |
726 | result = sysfs_create_link(&pr->cdev->device.kobj, | |
727 | &device->dev.kobj, | |
728 | "device"); | |
729 | if (result) | |
730 | printk(KERN_ERR PREFIX "Create sysfs link\n"); | |
d9460fd2 | 731 | |
1da177e4 LT |
732 | if (pr->flags.throttling) { |
733 | printk(KERN_INFO PREFIX "%s [%s] (supports", | |
4be44fcd | 734 | acpi_device_name(device), acpi_device_bid(device)); |
1da177e4 LT |
735 | printk(" %d throttling states", pr->throttling.state_count); |
736 | printk(")\n"); | |
737 | } | |
738 | ||
4be44fcd | 739 | end: |
1da177e4 | 740 | |
d550d98d | 741 | return result; |
1da177e4 LT |
742 | } |
743 | ||
4be44fcd | 744 | static void acpi_processor_notify(acpi_handle handle, u32 event, void *data) |
1da177e4 | 745 | { |
50dd0969 | 746 | struct acpi_processor *pr = data; |
4be44fcd | 747 | struct acpi_device *device = NULL; |
e790cc8b | 748 | int saved; |
1da177e4 LT |
749 | |
750 | if (!pr) | |
d550d98d | 751 | return; |
1da177e4 LT |
752 | |
753 | if (acpi_bus_get_device(pr->handle, &device)) | |
d550d98d | 754 | return; |
1da177e4 LT |
755 | |
756 | switch (event) { | |
757 | case ACPI_PROCESSOR_NOTIFY_PERFORMANCE: | |
e790cc8b | 758 | saved = pr->performance_platform_limit; |
1da177e4 | 759 | acpi_processor_ppc_has_changed(pr); |
e790cc8b AS |
760 | if (saved == pr->performance_platform_limit) |
761 | break; | |
14e04fb3 | 762 | acpi_bus_generate_proc_event(device, event, |
4be44fcd | 763 | pr->performance_platform_limit); |
962ce8ca ZR |
764 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
765 | device->dev.bus_id, event, | |
766 | pr->performance_platform_limit); | |
1da177e4 LT |
767 | break; |
768 | case ACPI_PROCESSOR_NOTIFY_POWER: | |
769 | acpi_processor_cst_has_changed(pr); | |
14e04fb3 | 770 | acpi_bus_generate_proc_event(device, event, 0); |
962ce8ca ZR |
771 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
772 | device->dev.bus_id, event, 0); | |
1da177e4 | 773 | break; |
01854e69 LY |
774 | case ACPI_PROCESSOR_NOTIFY_THROTTLING: |
775 | acpi_processor_tstate_has_changed(pr); | |
14e04fb3 | 776 | acpi_bus_generate_proc_event(device, event, 0); |
962ce8ca ZR |
777 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
778 | device->dev.bus_id, event, 0); | |
1da177e4 LT |
779 | default: |
780 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 781 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
782 | break; |
783 | } | |
784 | ||
d550d98d | 785 | return; |
1da177e4 LT |
786 | } |
787 | ||
729c6ba3 VP |
788 | static int acpi_cpu_soft_notify(struct notifier_block *nfb, |
789 | unsigned long action, void *hcpu) | |
790 | { | |
791 | unsigned int cpu = (unsigned long)hcpu; | |
706546d0 | 792 | struct acpi_processor *pr = per_cpu(processors, cpu); |
729c6ba3 VP |
793 | |
794 | if (action == CPU_ONLINE && pr) { | |
795 | acpi_processor_ppc_has_changed(pr); | |
796 | acpi_processor_cst_has_changed(pr); | |
797 | acpi_processor_tstate_has_changed(pr); | |
798 | } | |
799 | return NOTIFY_OK; | |
800 | } | |
801 | ||
802 | static struct notifier_block acpi_cpu_notifier = | |
803 | { | |
804 | .notifier_call = acpi_cpu_soft_notify, | |
805 | }; | |
806 | ||
4be44fcd | 807 | static int acpi_processor_add(struct acpi_device *device) |
1da177e4 | 808 | { |
4be44fcd | 809 | struct acpi_processor *pr = NULL; |
1da177e4 | 810 | |
1da177e4 LT |
811 | |
812 | if (!device) | |
d550d98d | 813 | return -EINVAL; |
1da177e4 | 814 | |
36bcbec7 | 815 | pr = kzalloc(sizeof(struct acpi_processor), GFP_KERNEL); |
1da177e4 | 816 | if (!pr) |
d550d98d | 817 | return -ENOMEM; |
1da177e4 LT |
818 | |
819 | pr->handle = device->handle; | |
820 | strcpy(acpi_device_name(device), ACPI_PROCESSOR_DEVICE_NAME); | |
821 | strcpy(acpi_device_class(device), ACPI_PROCESSOR_CLASS); | |
822 | acpi_driver_data(device) = pr; | |
823 | ||
d550d98d | 824 | return 0; |
1da177e4 LT |
825 | } |
826 | ||
4be44fcd | 827 | static int acpi_processor_remove(struct acpi_device *device, int type) |
1da177e4 | 828 | { |
4be44fcd LB |
829 | acpi_status status = AE_OK; |
830 | struct acpi_processor *pr = NULL; | |
1da177e4 | 831 | |
1da177e4 LT |
832 | |
833 | if (!device || !acpi_driver_data(device)) | |
d550d98d | 834 | return -EINVAL; |
1da177e4 | 835 | |
50dd0969 | 836 | pr = acpi_driver_data(device); |
1da177e4 | 837 | |
fbb43ab0 | 838 | if (pr->id >= nr_cpu_ids) { |
1da177e4 | 839 | kfree(pr); |
d550d98d | 840 | return 0; |
1da177e4 LT |
841 | } |
842 | ||
843 | if (type == ACPI_BUS_REMOVAL_EJECT) { | |
844 | if (acpi_processor_handle_eject(pr)) | |
d550d98d | 845 | return -EINVAL; |
1da177e4 LT |
846 | } |
847 | ||
848 | acpi_processor_power_exit(pr, device); | |
849 | ||
850 | status = acpi_remove_notify_handler(pr->handle, ACPI_DEVICE_NOTIFY, | |
4be44fcd | 851 | acpi_processor_notify); |
1da177e4 | 852 | |
9f1eb99c ZR |
853 | sysfs_remove_link(&device->dev.kobj, "sysdev"); |
854 | ||
1da177e4 LT |
855 | acpi_processor_remove_fs(device); |
856 | ||
f28bb45e ZY |
857 | if (pr->cdev) { |
858 | sysfs_remove_link(&device->dev.kobj, "thermal_cooling"); | |
859 | sysfs_remove_link(&pr->cdev->device.kobj, "device"); | |
860 | thermal_cooling_device_unregister(pr->cdev); | |
861 | pr->cdev = NULL; | |
862 | } | |
d9460fd2 | 863 | |
706546d0 MT |
864 | per_cpu(processors, pr->id) = NULL; |
865 | per_cpu(processor_device_array, pr->id) = NULL; | |
1da177e4 LT |
866 | kfree(pr); |
867 | ||
d550d98d | 868 | return 0; |
1da177e4 LT |
869 | } |
870 | ||
871 | #ifdef CONFIG_ACPI_HOTPLUG_CPU | |
872 | /**************************************************************************** | |
873 | * Acpi processor hotplug support * | |
874 | ****************************************************************************/ | |
875 | ||
4be44fcd | 876 | static int is_processor_present(acpi_handle handle) |
1da177e4 | 877 | { |
4be44fcd LB |
878 | acpi_status status; |
879 | unsigned long sta = 0; | |
1da177e4 | 880 | |
1da177e4 LT |
881 | |
882 | status = acpi_evaluate_integer(handle, "_STA", NULL, &sta); | |
cfaf3747 ZR |
883 | |
884 | if (ACPI_SUCCESS(status) && (sta & ACPI_STA_DEVICE_PRESENT)) | |
885 | return 1; | |
886 | ||
d0ce46f5 ZR |
887 | /* |
888 | * _STA is mandatory for a processor that supports hot plug | |
889 | */ | |
890 | if (status == AE_NOT_FOUND) | |
891 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
892 | "Processor does not support hot plug\n")); | |
893 | else | |
894 | ACPI_EXCEPTION((AE_INFO, status, | |
895 | "Processor Device is not present")); | |
cfaf3747 | 896 | return 0; |
1da177e4 LT |
897 | } |
898 | ||
1da177e4 | 899 | static |
4be44fcd | 900 | int acpi_processor_device_add(acpi_handle handle, struct acpi_device **device) |
1da177e4 | 901 | { |
4be44fcd LB |
902 | acpi_handle phandle; |
903 | struct acpi_device *pdev; | |
904 | struct acpi_processor *pr; | |
1da177e4 | 905 | |
1da177e4 LT |
906 | |
907 | if (acpi_get_parent(handle, &phandle)) { | |
d550d98d | 908 | return -ENODEV; |
1da177e4 LT |
909 | } |
910 | ||
911 | if (acpi_bus_get_device(phandle, &pdev)) { | |
d550d98d | 912 | return -ENODEV; |
1da177e4 LT |
913 | } |
914 | ||
915 | if (acpi_bus_add(device, pdev, handle, ACPI_BUS_TYPE_PROCESSOR)) { | |
d550d98d | 916 | return -ENODEV; |
1da177e4 LT |
917 | } |
918 | ||
3fb02738 | 919 | acpi_bus_start(*device); |
1da177e4 LT |
920 | |
921 | pr = acpi_driver_data(*device); | |
922 | if (!pr) | |
d550d98d | 923 | return -ENODEV; |
1da177e4 | 924 | |
fbb43ab0 | 925 | if ((pr->id >= 0) && (pr->id < nr_cpu_ids)) { |
f883d9db | 926 | kobject_uevent(&(*device)->dev.kobj, KOBJ_ONLINE); |
1da177e4 | 927 | } |
d550d98d | 928 | return 0; |
1da177e4 LT |
929 | } |
930 | ||
b95e9e8d SR |
931 | static void __ref acpi_processor_hotplug_notify(acpi_handle handle, |
932 | u32 event, void *data) | |
1da177e4 | 933 | { |
4be44fcd LB |
934 | struct acpi_processor *pr; |
935 | struct acpi_device *device = NULL; | |
1da177e4 LT |
936 | int result; |
937 | ||
1da177e4 LT |
938 | |
939 | switch (event) { | |
940 | case ACPI_NOTIFY_BUS_CHECK: | |
941 | case ACPI_NOTIFY_DEVICE_CHECK: | |
d6f882e1 GC |
942 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
943 | "Processor driver received %s event\n", | |
4be44fcd | 944 | (event == ACPI_NOTIFY_BUS_CHECK) ? |
d6f882e1 | 945 | "ACPI_NOTIFY_BUS_CHECK" : "ACPI_NOTIFY_DEVICE_CHECK")); |
1da177e4 LT |
946 | |
947 | if (!is_processor_present(handle)) | |
948 | break; | |
949 | ||
950 | if (acpi_bus_get_device(handle, &device)) { | |
951 | result = acpi_processor_device_add(handle, &device); | |
952 | if (result) | |
6468463a LB |
953 | printk(KERN_ERR PREFIX |
954 | "Unable to add the device\n"); | |
1da177e4 LT |
955 | break; |
956 | } | |
957 | ||
958 | pr = acpi_driver_data(device); | |
959 | if (!pr) { | |
6468463a | 960 | printk(KERN_ERR PREFIX "Driver data is NULL\n"); |
1da177e4 LT |
961 | break; |
962 | } | |
963 | ||
fbb43ab0 | 964 | if (pr->id >= 0 && (pr->id < nr_cpu_ids)) { |
f883d9db | 965 | kobject_uevent(&device->dev.kobj, KOBJ_OFFLINE); |
1da177e4 LT |
966 | break; |
967 | } | |
968 | ||
969 | result = acpi_processor_start(device); | |
fbb43ab0 | 970 | if ((!result) && ((pr->id >= 0) && (pr->id < nr_cpu_ids))) { |
f883d9db | 971 | kobject_uevent(&device->dev.kobj, KOBJ_ONLINE); |
1da177e4 | 972 | } else { |
6468463a LB |
973 | printk(KERN_ERR PREFIX "Device [%s] failed to start\n", |
974 | acpi_device_bid(device)); | |
1da177e4 | 975 | } |
4be44fcd | 976 | break; |
1da177e4 | 977 | case ACPI_NOTIFY_EJECT_REQUEST: |
4be44fcd LB |
978 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
979 | "received ACPI_NOTIFY_EJECT_REQUEST\n")); | |
1da177e4 LT |
980 | |
981 | if (acpi_bus_get_device(handle, &device)) { | |
6468463a LB |
982 | printk(KERN_ERR PREFIX |
983 | "Device don't exist, dropping EJECT\n"); | |
1da177e4 LT |
984 | break; |
985 | } | |
986 | pr = acpi_driver_data(device); | |
987 | if (!pr) { | |
6468463a LB |
988 | printk(KERN_ERR PREFIX |
989 | "Driver data is NULL, dropping EJECT\n"); | |
d550d98d | 990 | return; |
1da177e4 LT |
991 | } |
992 | ||
fbb43ab0 | 993 | if ((pr->id < nr_cpu_ids) && (cpu_present(pr->id))) |
f883d9db | 994 | kobject_uevent(&device->dev.kobj, KOBJ_OFFLINE); |
1da177e4 LT |
995 | break; |
996 | default: | |
997 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 998 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
999 | break; |
1000 | } | |
1001 | ||
d550d98d | 1002 | return; |
1da177e4 LT |
1003 | } |
1004 | ||
1005 | static acpi_status | |
1006 | processor_walk_namespace_cb(acpi_handle handle, | |
4be44fcd | 1007 | u32 lvl, void *context, void **rv) |
1da177e4 | 1008 | { |
4be44fcd | 1009 | acpi_status status; |
1da177e4 | 1010 | int *action = context; |
4be44fcd | 1011 | acpi_object_type type = 0; |
1da177e4 LT |
1012 | |
1013 | status = acpi_get_type(handle, &type); | |
1014 | if (ACPI_FAILURE(status)) | |
4be44fcd | 1015 | return (AE_OK); |
1da177e4 LT |
1016 | |
1017 | if (type != ACPI_TYPE_PROCESSOR) | |
4be44fcd | 1018 | return (AE_OK); |
1da177e4 | 1019 | |
4be44fcd | 1020 | switch (*action) { |
1da177e4 LT |
1021 | case INSTALL_NOTIFY_HANDLER: |
1022 | acpi_install_notify_handler(handle, | |
4be44fcd LB |
1023 | ACPI_SYSTEM_NOTIFY, |
1024 | acpi_processor_hotplug_notify, | |
1025 | NULL); | |
1da177e4 LT |
1026 | break; |
1027 | case UNINSTALL_NOTIFY_HANDLER: | |
1028 | acpi_remove_notify_handler(handle, | |
4be44fcd LB |
1029 | ACPI_SYSTEM_NOTIFY, |
1030 | acpi_processor_hotplug_notify); | |
1da177e4 LT |
1031 | break; |
1032 | default: | |
1033 | break; | |
1034 | } | |
1035 | ||
4be44fcd | 1036 | return (AE_OK); |
1da177e4 LT |
1037 | } |
1038 | ||
4be44fcd | 1039 | static acpi_status acpi_processor_hotadd_init(acpi_handle handle, int *p_cpu) |
1da177e4 | 1040 | { |
1da177e4 LT |
1041 | |
1042 | if (!is_processor_present(handle)) { | |
d550d98d | 1043 | return AE_ERROR; |
1da177e4 LT |
1044 | } |
1045 | ||
1046 | if (acpi_map_lsapic(handle, p_cpu)) | |
d550d98d | 1047 | return AE_ERROR; |
1da177e4 LT |
1048 | |
1049 | if (arch_register_cpu(*p_cpu)) { | |
1050 | acpi_unmap_lsapic(*p_cpu); | |
d550d98d | 1051 | return AE_ERROR; |
1da177e4 LT |
1052 | } |
1053 | ||
d550d98d | 1054 | return AE_OK; |
1da177e4 LT |
1055 | } |
1056 | ||
4be44fcd | 1057 | static int acpi_processor_handle_eject(struct acpi_processor *pr) |
1da177e4 | 1058 | { |
b62b8ef9 ZR |
1059 | if (cpu_online(pr->id)) |
1060 | cpu_down(pr->id); | |
1061 | ||
1da177e4 LT |
1062 | arch_unregister_cpu(pr->id); |
1063 | acpi_unmap_lsapic(pr->id); | |
4be44fcd | 1064 | return (0); |
1da177e4 LT |
1065 | } |
1066 | #else | |
4be44fcd | 1067 | static acpi_status acpi_processor_hotadd_init(acpi_handle handle, int *p_cpu) |
1da177e4 LT |
1068 | { |
1069 | return AE_ERROR; | |
1070 | } | |
4be44fcd | 1071 | static int acpi_processor_handle_eject(struct acpi_processor *pr) |
1da177e4 | 1072 | { |
4be44fcd | 1073 | return (-EINVAL); |
1da177e4 LT |
1074 | } |
1075 | #endif | |
1076 | ||
1da177e4 LT |
1077 | static |
1078 | void acpi_processor_install_hotplug_notify(void) | |
1079 | { | |
1080 | #ifdef CONFIG_ACPI_HOTPLUG_CPU | |
1081 | int action = INSTALL_NOTIFY_HANDLER; | |
1082 | acpi_walk_namespace(ACPI_TYPE_PROCESSOR, | |
4be44fcd LB |
1083 | ACPI_ROOT_OBJECT, |
1084 | ACPI_UINT32_MAX, | |
1085 | processor_walk_namespace_cb, &action, NULL); | |
1da177e4 | 1086 | #endif |
729c6ba3 | 1087 | register_hotcpu_notifier(&acpi_cpu_notifier); |
1da177e4 LT |
1088 | } |
1089 | ||
1da177e4 LT |
1090 | static |
1091 | void acpi_processor_uninstall_hotplug_notify(void) | |
1092 | { | |
1093 | #ifdef CONFIG_ACPI_HOTPLUG_CPU | |
1094 | int action = UNINSTALL_NOTIFY_HANDLER; | |
1095 | acpi_walk_namespace(ACPI_TYPE_PROCESSOR, | |
4be44fcd LB |
1096 | ACPI_ROOT_OBJECT, |
1097 | ACPI_UINT32_MAX, | |
1098 | processor_walk_namespace_cb, &action, NULL); | |
1da177e4 | 1099 | #endif |
729c6ba3 | 1100 | unregister_hotcpu_notifier(&acpi_cpu_notifier); |
1da177e4 LT |
1101 | } |
1102 | ||
1103 | /* | |
1104 | * We keep the driver loaded even when ACPI is not running. | |
1105 | * This is needed for the powernow-k8 driver, that works even without | |
1106 | * ACPI, but needs symbols from this driver | |
1107 | */ | |
1108 | ||
4be44fcd | 1109 | static int __init acpi_processor_init(void) |
1da177e4 | 1110 | { |
4be44fcd | 1111 | int result = 0; |
1da177e4 | 1112 | |
1da177e4 LT |
1113 | memset(&errata, 0, sizeof(errata)); |
1114 | ||
f18c5a08 AS |
1115 | #ifdef CONFIG_SMP |
1116 | if (ACPI_FAILURE(acpi_get_table(ACPI_SIG_MADT, 0, | |
1117 | (struct acpi_table_header **)&madt))) | |
70c0846e | 1118 | madt = NULL; |
f18c5a08 AS |
1119 | #endif |
1120 | ||
1da177e4 LT |
1121 | acpi_processor_dir = proc_mkdir(ACPI_PROCESSOR_CLASS, acpi_root_dir); |
1122 | if (!acpi_processor_dir) | |
83822fc9 | 1123 | return -ENOMEM; |
1da177e4 LT |
1124 | acpi_processor_dir->owner = THIS_MODULE; |
1125 | ||
2a2a6471 ZY |
1126 | /* |
1127 | * Check whether the system is DMI table. If yes, OSPM | |
1128 | * should not use mwait for CPU-states. | |
1129 | */ | |
1130 | dmi_check_system(processor_idle_dmi_table); | |
4f86d3a8 LB |
1131 | result = cpuidle_register_driver(&acpi_idle_driver); |
1132 | if (result < 0) | |
1133 | goto out_proc; | |
1134 | ||
1da177e4 | 1135 | result = acpi_bus_register_driver(&acpi_processor_driver); |
4f86d3a8 LB |
1136 | if (result < 0) |
1137 | goto out_cpuidle; | |
1da177e4 LT |
1138 | |
1139 | acpi_processor_install_hotplug_notify(); | |
1140 | ||
1141 | acpi_thermal_cpufreq_init(); | |
1142 | ||
1143 | acpi_processor_ppc_init(); | |
1144 | ||
1180509f ZY |
1145 | acpi_processor_throttling_init(); |
1146 | ||
d550d98d | 1147 | return 0; |
4f86d3a8 LB |
1148 | |
1149 | out_cpuidle: | |
1150 | cpuidle_unregister_driver(&acpi_idle_driver); | |
1151 | ||
1152 | out_proc: | |
1153 | remove_proc_entry(ACPI_PROCESSOR_CLASS, acpi_root_dir); | |
1154 | ||
1155 | return result; | |
1da177e4 LT |
1156 | } |
1157 | ||
4be44fcd | 1158 | static void __exit acpi_processor_exit(void) |
1da177e4 | 1159 | { |
1da177e4 LT |
1160 | acpi_processor_ppc_exit(); |
1161 | ||
1162 | acpi_thermal_cpufreq_exit(); | |
1163 | ||
1164 | acpi_processor_uninstall_hotplug_notify(); | |
1165 | ||
1166 | acpi_bus_unregister_driver(&acpi_processor_driver); | |
1167 | ||
4f86d3a8 LB |
1168 | cpuidle_unregister_driver(&acpi_idle_driver); |
1169 | ||
1da177e4 LT |
1170 | remove_proc_entry(ACPI_PROCESSOR_CLASS, acpi_root_dir); |
1171 | ||
d550d98d | 1172 | return; |
1da177e4 LT |
1173 | } |
1174 | ||
1da177e4 LT |
1175 | module_init(acpi_processor_init); |
1176 | module_exit(acpi_processor_exit); | |
1177 | ||
1178 | EXPORT_SYMBOL(acpi_processor_set_thermal_limit); | |
1179 | ||
1180 | MODULE_ALIAS("processor"); |