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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 | ||
a192a958 LB |
62 | #define PREFIX "ACPI: " |
63 | ||
1da177e4 | 64 | #define ACPI_PROCESSOR_CLASS "processor" |
1da177e4 LT |
65 | #define ACPI_PROCESSOR_DEVICE_NAME "Processor" |
66 | #define ACPI_PROCESSOR_FILE_INFO "info" | |
67 | #define ACPI_PROCESSOR_FILE_THROTTLING "throttling" | |
68 | #define ACPI_PROCESSOR_FILE_LIMIT "limit" | |
69 | #define ACPI_PROCESSOR_NOTIFY_PERFORMANCE 0x80 | |
70 | #define ACPI_PROCESSOR_NOTIFY_POWER 0x81 | |
01854e69 | 71 | #define ACPI_PROCESSOR_NOTIFY_THROTTLING 0x82 |
1da177e4 LT |
72 | |
73 | #define ACPI_PROCESSOR_LIMIT_USER 0 | |
74 | #define ACPI_PROCESSOR_LIMIT_THERMAL 1 | |
75 | ||
1da177e4 | 76 | #define _COMPONENT ACPI_PROCESSOR_COMPONENT |
f52fd66d | 77 | ACPI_MODULE_NAME("processor_core"); |
1da177e4 | 78 | |
f52fd66d | 79 | MODULE_AUTHOR("Paul Diefenbaugh"); |
7cda93e0 | 80 | MODULE_DESCRIPTION("ACPI Processor Driver"); |
1da177e4 LT |
81 | MODULE_LICENSE("GPL"); |
82 | ||
4be44fcd | 83 | static int acpi_processor_add(struct acpi_device *device); |
4be44fcd | 84 | static int acpi_processor_remove(struct acpi_device *device, int type); |
74cad4ee | 85 | #ifdef CONFIG_ACPI_PROCFS |
1da177e4 | 86 | static int acpi_processor_info_open_fs(struct inode *inode, struct file *file); |
74cad4ee | 87 | #endif |
7ec0a729 | 88 | static void acpi_processor_notify(struct acpi_device *device, u32 event); |
1da177e4 LT |
89 | static acpi_status acpi_processor_hotadd_init(acpi_handle handle, int *p_cpu); |
90 | static int acpi_processor_handle_eject(struct acpi_processor *pr); | |
01854e69 | 91 | |
1da177e4 | 92 | |
1ba90e3a | 93 | static const struct acpi_device_id processor_device_ids[] = { |
ad93a765 | 94 | {ACPI_PROCESSOR_OBJECT_HID, 0}, |
9eccbc2f | 95 | {"ACPI0007", 0}, |
1ba90e3a TR |
96 | {"", 0}, |
97 | }; | |
98 | MODULE_DEVICE_TABLE(acpi, processor_device_ids); | |
99 | ||
1da177e4 | 100 | static struct acpi_driver acpi_processor_driver = { |
c2b6705b | 101 | .name = "processor", |
4be44fcd | 102 | .class = ACPI_PROCESSOR_CLASS, |
1ba90e3a | 103 | .ids = processor_device_ids, |
4be44fcd LB |
104 | .ops = { |
105 | .add = acpi_processor_add, | |
106 | .remove = acpi_processor_remove, | |
b04e7bdb TG |
107 | .suspend = acpi_processor_suspend, |
108 | .resume = acpi_processor_resume, | |
7ec0a729 | 109 | .notify = acpi_processor_notify, |
4be44fcd | 110 | }, |
1da177e4 LT |
111 | }; |
112 | ||
113 | #define INSTALL_NOTIFY_HANDLER 1 | |
114 | #define UNINSTALL_NOTIFY_HANDLER 2 | |
74cad4ee | 115 | #ifdef CONFIG_ACPI_PROCFS |
d7508032 | 116 | static const struct file_operations acpi_processor_info_fops = { |
cf7acfab | 117 | .owner = THIS_MODULE, |
4be44fcd LB |
118 | .open = acpi_processor_info_open_fs, |
119 | .read = seq_read, | |
120 | .llseek = seq_lseek, | |
121 | .release = single_release, | |
1da177e4 | 122 | }; |
74cad4ee | 123 | #endif |
1da177e4 | 124 | |
706546d0 | 125 | DEFINE_PER_CPU(struct acpi_processor *, processors); |
9f222718 | 126 | struct acpi_processor_errata errata __read_mostly; |
2a2a6471 ZY |
127 | static int set_no_mwait(const struct dmi_system_id *id) |
128 | { | |
129 | printk(KERN_NOTICE PREFIX "%s detected - " | |
d0057413 | 130 | "disabling mwait for CPU C-states\n", id->ident); |
2a2a6471 ZY |
131 | idle_nomwait = 1; |
132 | return 0; | |
133 | } | |
134 | ||
135 | static struct dmi_system_id __cpuinitdata processor_idle_dmi_table[] = { | |
136 | { | |
137 | set_no_mwait, "IFL91 board", { | |
138 | DMI_MATCH(DMI_BIOS_VENDOR, "COMPAL"), | |
139 | DMI_MATCH(DMI_SYS_VENDOR, "ZEPTO"), | |
140 | DMI_MATCH(DMI_PRODUCT_VERSION, "3215W"), | |
141 | DMI_MATCH(DMI_BOARD_NAME, "IFL91") }, NULL}, | |
142 | { | |
143 | set_no_mwait, "Extensa 5220", { | |
144 | DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies LTD"), | |
3df8a905 | 145 | DMI_MATCH(DMI_SYS_VENDOR, "Acer"), |
2a2a6471 ZY |
146 | DMI_MATCH(DMI_PRODUCT_VERSION, "0100"), |
147 | DMI_MATCH(DMI_BOARD_NAME, "Columbia") }, NULL}, | |
148 | {}, | |
149 | }; | |
1da177e4 | 150 | |
1da177e4 LT |
151 | /* -------------------------------------------------------------------------- |
152 | Errata Handling | |
153 | -------------------------------------------------------------------------- */ | |
154 | ||
4be44fcd | 155 | static int acpi_processor_errata_piix4(struct pci_dev *dev) |
1da177e4 | 156 | { |
4be44fcd LB |
157 | u8 value1 = 0; |
158 | u8 value2 = 0; | |
1da177e4 | 159 | |
1da177e4 LT |
160 | |
161 | if (!dev) | |
d550d98d | 162 | return -EINVAL; |
1da177e4 LT |
163 | |
164 | /* | |
165 | * Note that 'dev' references the PIIX4 ACPI Controller. | |
166 | */ | |
167 | ||
44c10138 | 168 | switch (dev->revision) { |
1da177e4 LT |
169 | case 0: |
170 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found PIIX4 A-step\n")); | |
171 | break; | |
172 | case 1: | |
173 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found PIIX4 B-step\n")); | |
174 | break; | |
175 | case 2: | |
176 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found PIIX4E\n")); | |
177 | break; | |
178 | case 3: | |
179 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found PIIX4M\n")); | |
180 | break; | |
181 | default: | |
182 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found unknown PIIX4\n")); | |
183 | break; | |
184 | } | |
185 | ||
44c10138 | 186 | switch (dev->revision) { |
1da177e4 LT |
187 | |
188 | case 0: /* PIIX4 A-step */ | |
189 | case 1: /* PIIX4 B-step */ | |
190 | /* | |
191 | * See specification changes #13 ("Manual Throttle Duty Cycle") | |
192 | * and #14 ("Enabling and Disabling Manual Throttle"), plus | |
193 | * erratum #5 ("STPCLK# Deassertion Time") from the January | |
194 | * 2002 PIIX4 specification update. Applies to only older | |
195 | * PIIX4 models. | |
196 | */ | |
197 | errata.piix4.throttle = 1; | |
198 | ||
199 | case 2: /* PIIX4E */ | |
200 | case 3: /* PIIX4M */ | |
201 | /* | |
202 | * See erratum #18 ("C3 Power State/BMIDE and Type-F DMA | |
203 | * Livelock") from the January 2002 PIIX4 specification update. | |
204 | * Applies to all PIIX4 models. | |
205 | */ | |
206 | ||
207 | /* | |
208 | * BM-IDE | |
209 | * ------ | |
210 | * Find the PIIX4 IDE Controller and get the Bus Master IDE | |
211 | * Status register address. We'll use this later to read | |
212 | * each IDE controller's DMA status to make sure we catch all | |
213 | * DMA activity. | |
214 | */ | |
215 | dev = pci_get_subsys(PCI_VENDOR_ID_INTEL, | |
4be44fcd LB |
216 | PCI_DEVICE_ID_INTEL_82371AB, |
217 | PCI_ANY_ID, PCI_ANY_ID, NULL); | |
1da177e4 LT |
218 | if (dev) { |
219 | errata.piix4.bmisx = pci_resource_start(dev, 4); | |
220 | pci_dev_put(dev); | |
221 | } | |
222 | ||
223 | /* | |
224 | * Type-F DMA | |
225 | * ---------- | |
226 | * Find the PIIX4 ISA Controller and read the Motherboard | |
227 | * DMA controller's status to see if Type-F (Fast) DMA mode | |
228 | * is enabled (bit 7) on either channel. Note that we'll | |
229 | * disable C3 support if this is enabled, as some legacy | |
230 | * devices won't operate well if fast DMA is disabled. | |
231 | */ | |
232 | dev = pci_get_subsys(PCI_VENDOR_ID_INTEL, | |
4be44fcd LB |
233 | PCI_DEVICE_ID_INTEL_82371AB_0, |
234 | PCI_ANY_ID, PCI_ANY_ID, NULL); | |
1da177e4 LT |
235 | if (dev) { |
236 | pci_read_config_byte(dev, 0x76, &value1); | |
237 | pci_read_config_byte(dev, 0x77, &value2); | |
238 | if ((value1 & 0x80) || (value2 & 0x80)) | |
239 | errata.piix4.fdma = 1; | |
240 | pci_dev_put(dev); | |
241 | } | |
242 | ||
243 | break; | |
244 | } | |
245 | ||
246 | if (errata.piix4.bmisx) | |
247 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 248 | "Bus master activity detection (BM-IDE) erratum enabled\n")); |
1da177e4 LT |
249 | if (errata.piix4.fdma) |
250 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 251 | "Type-F DMA livelock erratum (C3 disabled)\n")); |
1da177e4 | 252 | |
d550d98d | 253 | return 0; |
1da177e4 LT |
254 | } |
255 | ||
8713cbef | 256 | static int acpi_processor_errata(struct acpi_processor *pr) |
1da177e4 | 257 | { |
4be44fcd LB |
258 | int result = 0; |
259 | struct pci_dev *dev = NULL; | |
1da177e4 | 260 | |
1da177e4 LT |
261 | |
262 | if (!pr) | |
d550d98d | 263 | return -EINVAL; |
1da177e4 LT |
264 | |
265 | /* | |
266 | * PIIX4 | |
267 | */ | |
268 | dev = pci_get_subsys(PCI_VENDOR_ID_INTEL, | |
4be44fcd LB |
269 | PCI_DEVICE_ID_INTEL_82371AB_3, PCI_ANY_ID, |
270 | PCI_ANY_ID, NULL); | |
1da177e4 LT |
271 | if (dev) { |
272 | result = acpi_processor_errata_piix4(dev); | |
273 | pci_dev_put(dev); | |
274 | } | |
275 | ||
d550d98d | 276 | return result; |
1da177e4 LT |
277 | } |
278 | ||
02df8b93 | 279 | /* -------------------------------------------------------------------------- |
0b28002f | 280 | Common ACPI processor functions |
02df8b93 VP |
281 | -------------------------------------------------------------------------- */ |
282 | ||
283 | /* | |
284 | * _PDC is required for a BIOS-OS handshake for most of the newer | |
285 | * ACPI processor features. | |
286 | */ | |
05131ecc | 287 | static int acpi_processor_set_pdc(struct acpi_processor *pr) |
02df8b93 | 288 | { |
05131ecc | 289 | struct acpi_object_list *pdc_in = pr->pdc; |
4be44fcd | 290 | acpi_status status = AE_OK; |
02df8b93 | 291 | |
02df8b93 | 292 | |
05131ecc | 293 | if (!pdc_in) |
d550d98d | 294 | return status; |
da5e09a1 ZY |
295 | if (idle_nomwait) { |
296 | /* | |
297 | * If mwait is disabled for CPU C-states, the C2C3_FFH access | |
298 | * mode will be disabled in the parameter of _PDC object. | |
299 | * Of course C1_FFH access mode will also be disabled. | |
300 | */ | |
301 | union acpi_object *obj; | |
302 | u32 *buffer = NULL; | |
02df8b93 | 303 | |
da5e09a1 ZY |
304 | obj = pdc_in->pointer; |
305 | buffer = (u32 *)(obj->buffer.pointer); | |
306 | buffer[2] &= ~(ACPI_PDC_C_C2C3_FFH | ACPI_PDC_C_C1_FFH); | |
307 | ||
308 | } | |
05131ecc | 309 | status = acpi_evaluate_object(pr->handle, "_PDC", pdc_in, NULL); |
02df8b93 | 310 | |
05131ecc | 311 | if (ACPI_FAILURE(status)) |
4be44fcd | 312 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
05131ecc | 313 | "Could not evaluate _PDC, using legacy perf. control...\n")); |
02df8b93 | 314 | |
d550d98d | 315 | return status; |
02df8b93 VP |
316 | } |
317 | ||
1da177e4 LT |
318 | /* -------------------------------------------------------------------------- |
319 | FS Interface (/proc) | |
320 | -------------------------------------------------------------------------- */ | |
321 | ||
74cad4ee | 322 | #ifdef CONFIG_ACPI_PROCFS |
4be44fcd | 323 | static struct proc_dir_entry *acpi_processor_dir = NULL; |
1da177e4 LT |
324 | |
325 | static int acpi_processor_info_seq_show(struct seq_file *seq, void *offset) | |
326 | { | |
50dd0969 | 327 | struct acpi_processor *pr = seq->private; |
1da177e4 | 328 | |
1da177e4 LT |
329 | |
330 | if (!pr) | |
331 | goto end; | |
332 | ||
333 | seq_printf(seq, "processor id: %d\n" | |
4be44fcd LB |
334 | "acpi id: %d\n" |
335 | "bus mastering control: %s\n" | |
336 | "power management: %s\n" | |
337 | "throttling control: %s\n" | |
338 | "limit interface: %s\n", | |
339 | pr->id, | |
340 | pr->acpi_id, | |
341 | pr->flags.bm_control ? "yes" : "no", | |
342 | pr->flags.power ? "yes" : "no", | |
343 | pr->flags.throttling ? "yes" : "no", | |
344 | pr->flags.limit ? "yes" : "no"); | |
345 | ||
346 | end: | |
d550d98d | 347 | return 0; |
1da177e4 LT |
348 | } |
349 | ||
350 | static int acpi_processor_info_open_fs(struct inode *inode, struct file *file) | |
351 | { | |
352 | return single_open(file, acpi_processor_info_seq_show, | |
4be44fcd | 353 | PDE(inode)->data); |
1da177e4 LT |
354 | } |
355 | ||
bf8b4542 | 356 | static int __cpuinit acpi_processor_add_fs(struct acpi_device *device) |
1da177e4 | 357 | { |
4be44fcd | 358 | struct proc_dir_entry *entry = NULL; |
1da177e4 | 359 | |
1da177e4 LT |
360 | |
361 | if (!acpi_device_dir(device)) { | |
362 | acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), | |
4be44fcd | 363 | acpi_processor_dir); |
1da177e4 | 364 | if (!acpi_device_dir(device)) |
d550d98d | 365 | return -ENODEV; |
1da177e4 | 366 | } |
1da177e4 LT |
367 | |
368 | /* 'info' [R] */ | |
cf7acfab DL |
369 | entry = proc_create_data(ACPI_PROCESSOR_FILE_INFO, |
370 | S_IRUGO, acpi_device_dir(device), | |
371 | &acpi_processor_info_fops, | |
372 | acpi_driver_data(device)); | |
1da177e4 | 373 | if (!entry) |
d550d98d | 374 | return -EIO; |
1da177e4 LT |
375 | |
376 | /* 'throttling' [R/W] */ | |
cf7acfab DL |
377 | entry = proc_create_data(ACPI_PROCESSOR_FILE_THROTTLING, |
378 | S_IFREG | S_IRUGO | S_IWUSR, | |
379 | acpi_device_dir(device), | |
380 | &acpi_processor_throttling_fops, | |
381 | acpi_driver_data(device)); | |
1da177e4 | 382 | if (!entry) |
d550d98d | 383 | return -EIO; |
1da177e4 LT |
384 | |
385 | /* 'limit' [R/W] */ | |
cf7acfab DL |
386 | entry = proc_create_data(ACPI_PROCESSOR_FILE_LIMIT, |
387 | S_IFREG | S_IRUGO | S_IWUSR, | |
388 | acpi_device_dir(device), | |
389 | &acpi_processor_limit_fops, | |
390 | acpi_driver_data(device)); | |
1da177e4 | 391 | if (!entry) |
d550d98d | 392 | return -EIO; |
d550d98d | 393 | return 0; |
1da177e4 | 394 | } |
4be44fcd | 395 | static int acpi_processor_remove_fs(struct acpi_device *device) |
1da177e4 | 396 | { |
1da177e4 LT |
397 | |
398 | if (acpi_device_dir(device)) { | |
4be44fcd LB |
399 | remove_proc_entry(ACPI_PROCESSOR_FILE_INFO, |
400 | acpi_device_dir(device)); | |
1da177e4 | 401 | remove_proc_entry(ACPI_PROCESSOR_FILE_THROTTLING, |
4be44fcd LB |
402 | acpi_device_dir(device)); |
403 | remove_proc_entry(ACPI_PROCESSOR_FILE_LIMIT, | |
404 | acpi_device_dir(device)); | |
1da177e4 LT |
405 | remove_proc_entry(acpi_device_bid(device), acpi_processor_dir); |
406 | acpi_device_dir(device) = NULL; | |
407 | } | |
408 | ||
d550d98d | 409 | return 0; |
1da177e4 | 410 | } |
74cad4ee ZY |
411 | #else |
412 | static inline int acpi_processor_add_fs(struct acpi_device *device) | |
413 | { | |
414 | return 0; | |
415 | } | |
416 | static inline int acpi_processor_remove_fs(struct acpi_device *device) | |
417 | { | |
418 | return 0; | |
419 | } | |
420 | #endif | |
1da177e4 LT |
421 | |
422 | /* Use the acpiid in MADT to map cpus in case of SMP */ | |
f18c5a08 | 423 | |
1da177e4 | 424 | #ifndef CONFIG_SMP |
b26e9286 | 425 | static int get_cpu_id(acpi_handle handle, int type, u32 acpi_id) { return -1; } |
1da177e4 LT |
426 | #else |
427 | ||
f18c5a08 AS |
428 | static struct acpi_table_madt *madt; |
429 | ||
430 | static int map_lapic_id(struct acpi_subtable_header *entry, | |
431 | u32 acpi_id, int *apic_id) | |
432 | { | |
433 | struct acpi_madt_local_apic *lapic = | |
434 | (struct acpi_madt_local_apic *)entry; | |
435 | if ((lapic->lapic_flags & ACPI_MADT_ENABLED) && | |
436 | lapic->processor_id == acpi_id) { | |
437 | *apic_id = lapic->id; | |
438 | return 1; | |
439 | } | |
440 | return 0; | |
441 | } | |
442 | ||
7237d3de SS |
443 | static int map_x2apic_id(struct acpi_subtable_header *entry, |
444 | int device_declaration, u32 acpi_id, int *apic_id) | |
445 | { | |
446 | struct acpi_madt_local_x2apic *apic = | |
447 | (struct acpi_madt_local_x2apic *)entry; | |
448 | u32 tmp = apic->local_apic_id; | |
449 | ||
450 | /* Only check enabled APICs*/ | |
451 | if (!(apic->lapic_flags & ACPI_MADT_ENABLED)) | |
452 | return 0; | |
453 | ||
454 | /* Device statement declaration type */ | |
455 | if (device_declaration) { | |
456 | if (apic->uid == acpi_id) | |
457 | goto found; | |
458 | } | |
459 | ||
460 | return 0; | |
461 | found: | |
462 | *apic_id = tmp; | |
463 | return 1; | |
464 | } | |
465 | ||
f18c5a08 | 466 | static int map_lsapic_id(struct acpi_subtable_header *entry, |
b26e9286 | 467 | int device_declaration, u32 acpi_id, int *apic_id) |
f18c5a08 AS |
468 | { |
469 | struct acpi_madt_local_sapic *lsapic = | |
470 | (struct acpi_madt_local_sapic *)entry; | |
b26e9286 MS |
471 | u32 tmp = (lsapic->id << 8) | lsapic->eid; |
472 | ||
f18c5a08 | 473 | /* Only check enabled APICs*/ |
b26e9286 MS |
474 | if (!(lsapic->lapic_flags & ACPI_MADT_ENABLED)) |
475 | return 0; | |
476 | ||
477 | /* Device statement declaration type */ | |
478 | if (device_declaration) { | |
479 | if (entry->length < 16) | |
480 | printk(KERN_ERR PREFIX | |
481 | "Invalid LSAPIC with Device type processor (SAPIC ID %#x)\n", | |
482 | tmp); | |
483 | else if (lsapic->uid == acpi_id) | |
484 | goto found; | |
485 | /* Processor statement declaration type */ | |
486 | } else if (lsapic->processor_id == acpi_id) | |
487 | goto found; | |
488 | ||
f18c5a08 | 489 | return 0; |
b26e9286 MS |
490 | found: |
491 | *apic_id = tmp; | |
492 | return 1; | |
f18c5a08 AS |
493 | } |
494 | ||
b26e9286 | 495 | static int map_madt_entry(int type, u32 acpi_id) |
f18c5a08 AS |
496 | { |
497 | unsigned long madt_end, entry; | |
498 | int apic_id = -1; | |
499 | ||
500 | if (!madt) | |
501 | return apic_id; | |
502 | ||
503 | entry = (unsigned long)madt; | |
504 | madt_end = entry + madt->header.length; | |
505 | ||
506 | /* Parse all entries looking for a match. */ | |
507 | ||
508 | entry += sizeof(struct acpi_table_madt); | |
509 | while (entry + sizeof(struct acpi_subtable_header) < madt_end) { | |
510 | struct acpi_subtable_header *header = | |
511 | (struct acpi_subtable_header *)entry; | |
512 | if (header->type == ACPI_MADT_TYPE_LOCAL_APIC) { | |
513 | if (map_lapic_id(header, acpi_id, &apic_id)) | |
514 | break; | |
7237d3de SS |
515 | } else if (header->type == ACPI_MADT_TYPE_LOCAL_X2APIC) { |
516 | if (map_x2apic_id(header, type, acpi_id, &apic_id)) | |
517 | break; | |
f18c5a08 | 518 | } else if (header->type == ACPI_MADT_TYPE_LOCAL_SAPIC) { |
b26e9286 | 519 | if (map_lsapic_id(header, type, acpi_id, &apic_id)) |
f18c5a08 AS |
520 | break; |
521 | } | |
522 | entry += header->length; | |
523 | } | |
524 | return apic_id; | |
525 | } | |
526 | ||
b26e9286 | 527 | static int map_mat_entry(acpi_handle handle, int type, u32 acpi_id) |
f18c5a08 AS |
528 | { |
529 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
530 | union acpi_object *obj; | |
531 | struct acpi_subtable_header *header; | |
532 | int apic_id = -1; | |
533 | ||
534 | if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer))) | |
535 | goto exit; | |
536 | ||
537 | if (!buffer.length || !buffer.pointer) | |
538 | goto exit; | |
539 | ||
540 | obj = buffer.pointer; | |
541 | if (obj->type != ACPI_TYPE_BUFFER || | |
542 | obj->buffer.length < sizeof(struct acpi_subtable_header)) { | |
543 | goto exit; | |
544 | } | |
545 | ||
546 | header = (struct acpi_subtable_header *)obj->buffer.pointer; | |
547 | if (header->type == ACPI_MADT_TYPE_LOCAL_APIC) { | |
548 | map_lapic_id(header, acpi_id, &apic_id); | |
549 | } else if (header->type == ACPI_MADT_TYPE_LOCAL_SAPIC) { | |
b26e9286 | 550 | map_lsapic_id(header, type, acpi_id, &apic_id); |
f18c5a08 AS |
551 | } |
552 | ||
553 | exit: | |
554 | if (buffer.pointer) | |
555 | kfree(buffer.pointer); | |
556 | return apic_id; | |
557 | } | |
558 | ||
b26e9286 | 559 | static int get_cpu_id(acpi_handle handle, int type, u32 acpi_id) |
1da177e4 | 560 | { |
4a35a46b | 561 | int i; |
f18c5a08 | 562 | int apic_id = -1; |
1da177e4 | 563 | |
b26e9286 | 564 | apic_id = map_mat_entry(handle, type, acpi_id); |
f18c5a08 | 565 | if (apic_id == -1) |
b26e9286 | 566 | apic_id = map_madt_entry(type, acpi_id); |
f18c5a08 AS |
567 | if (apic_id == -1) |
568 | return apic_id; | |
1da177e4 | 569 | |
fbb43ab0 | 570 | for_each_possible_cpu(i) { |
71b31233 | 571 | if (cpu_physical_id(i) == apic_id) |
4a35a46b | 572 | return i; |
1da177e4 LT |
573 | } |
574 | return -1; | |
575 | } | |
576 | #endif | |
577 | ||
578 | /* -------------------------------------------------------------------------- | |
579 | Driver Interface | |
580 | -------------------------------------------------------------------------- */ | |
581 | ||
b26e9286 | 582 | static int acpi_processor_get_info(struct acpi_device *device) |
1da177e4 | 583 | { |
4be44fcd LB |
584 | acpi_status status = 0; |
585 | union acpi_object object = { 0 }; | |
586 | struct acpi_buffer buffer = { sizeof(union acpi_object), &object }; | |
b26e9286 MS |
587 | struct acpi_processor *pr; |
588 | int cpu_index, device_declaration = 0; | |
4be44fcd | 589 | static int cpu0_initialized; |
1da177e4 | 590 | |
b26e9286 | 591 | pr = acpi_driver_data(device); |
1da177e4 | 592 | if (!pr) |
d550d98d | 593 | return -EINVAL; |
1da177e4 LT |
594 | |
595 | if (num_online_cpus() > 1) | |
596 | errata.smp = TRUE; | |
597 | ||
598 | acpi_processor_errata(pr); | |
599 | ||
600 | /* | |
601 | * Check to see if we have bus mastering arbitration control. This | |
602 | * is required for proper C3 usage (to maintain cache coherency). | |
603 | */ | |
cee324b1 | 604 | if (acpi_gbl_FADT.pm2_control_block && acpi_gbl_FADT.pm2_control_length) { |
1da177e4 LT |
605 | pr->flags.bm_control = 1; |
606 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd LB |
607 | "Bus mastering arbitration control present\n")); |
608 | } else | |
1da177e4 | 609 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
4be44fcd | 610 | "No bus mastering arbitration control\n")); |
1da177e4 | 611 | |
6cc73b48 BH |
612 | if (!strcmp(acpi_device_hid(device), ACPI_PROCESSOR_OBJECT_HID)) { |
613 | /* Declared with "Processor" statement; match ProcessorID */ | |
614 | status = acpi_evaluate_object(pr->handle, NULL, NULL, &buffer); | |
615 | if (ACPI_FAILURE(status)) { | |
616 | printk(KERN_ERR PREFIX "Evaluating processor object\n"); | |
617 | return -ENODEV; | |
618 | } | |
619 | ||
620 | /* | |
621 | * TBD: Synch processor ID (via LAPIC/LSAPIC structures) on SMP. | |
622 | * >>> 'acpi_get_processor_id(acpi_id, &id)' in | |
623 | * arch/xxx/acpi.c | |
624 | */ | |
625 | pr->acpi_id = object.processor.proc_id; | |
626 | } else { | |
b26e9286 MS |
627 | /* |
628 | * Declared with "Device" statement; match _UID. | |
629 | * Note that we don't handle string _UIDs yet. | |
630 | */ | |
27663c58 | 631 | unsigned long long value; |
11bf04c4 AS |
632 | status = acpi_evaluate_integer(pr->handle, METHOD_NAME__UID, |
633 | NULL, &value); | |
634 | if (ACPI_FAILURE(status)) { | |
b26e9286 MS |
635 | printk(KERN_ERR PREFIX |
636 | "Evaluating processor _UID [%#x]\n", status); | |
11bf04c4 AS |
637 | return -ENODEV; |
638 | } | |
b26e9286 | 639 | device_declaration = 1; |
11bf04c4 | 640 | pr->acpi_id = value; |
11bf04c4 | 641 | } |
b26e9286 | 642 | cpu_index = get_cpu_id(pr->handle, device_declaration, pr->acpi_id); |
1da177e4 | 643 | |
4be44fcd | 644 | /* Handle UP system running SMP kernel, with no LAPIC in MADT */ |
df42baa0 | 645 | if (!cpu0_initialized && (cpu_index == -1) && |
4be44fcd LB |
646 | (num_online_cpus() == 1)) { |
647 | cpu_index = 0; | |
648 | } | |
649 | ||
650 | cpu0_initialized = 1; | |
651 | ||
652 | pr->id = cpu_index; | |
653 | ||
654 | /* | |
655 | * Extra Processor objects may be enumerated on MP systems with | |
656 | * less than the max # of CPUs. They should be ignored _iff | |
657 | * they are physically not present. | |
658 | */ | |
f18c5a08 | 659 | if (pr->id == -1) { |
4be44fcd LB |
660 | if (ACPI_FAILURE |
661 | (acpi_processor_hotadd_init(pr->handle, &pr->id))) { | |
d550d98d | 662 | return -ENODEV; |
4be44fcd LB |
663 | } |
664 | } | |
7a04b849 ZY |
665 | /* |
666 | * On some boxes several processors use the same processor bus id. | |
667 | * But they are located in different scope. For example: | |
668 | * \_SB.SCK0.CPU0 | |
669 | * \_SB.SCK1.CPU0 | |
670 | * Rename the processor device bus id. And the new bus id will be | |
671 | * generated as the following format: | |
672 | * CPU+CPU ID. | |
673 | */ | |
674 | sprintf(acpi_device_bid(device), "CPU%X", pr->id); | |
1da177e4 | 675 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Processor [%d:%d]\n", pr->id, |
4be44fcd | 676 | pr->acpi_id)); |
1da177e4 LT |
677 | |
678 | if (!object.processor.pblk_address) | |
679 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No PBLK (NULL address)\n")); | |
680 | else if (object.processor.pblk_length != 6) | |
6468463a LB |
681 | printk(KERN_ERR PREFIX "Invalid PBLK length [%d]\n", |
682 | object.processor.pblk_length); | |
1da177e4 LT |
683 | else { |
684 | pr->throttling.address = object.processor.pblk_address; | |
cee324b1 AS |
685 | pr->throttling.duty_offset = acpi_gbl_FADT.duty_offset; |
686 | pr->throttling.duty_width = acpi_gbl_FADT.duty_width; | |
1da177e4 LT |
687 | |
688 | pr->pblk = object.processor.pblk_address; | |
689 | ||
690 | /* | |
691 | * We don't care about error returns - we just try to mark | |
692 | * these reserved so that nobody else is confused into thinking | |
693 | * that this region might be unused.. | |
694 | * | |
695 | * (In particular, allocating the IO range for Cardbus) | |
696 | */ | |
697 | request_region(pr->throttling.address, 6, "ACPI CPU throttle"); | |
698 | } | |
699 | ||
fe086a7b AC |
700 | /* |
701 | * If ACPI describes a slot number for this CPU, we can use it | |
702 | * ensure we get the right value in the "physical id" field | |
703 | * of /proc/cpuinfo | |
704 | */ | |
705 | status = acpi_evaluate_object(pr->handle, "_SUN", NULL, &buffer); | |
706 | if (ACPI_SUCCESS(status)) | |
707 | arch_fix_phys_package_id(pr->id, object.integer.value); | |
708 | ||
d550d98d | 709 | return 0; |
1da177e4 LT |
710 | } |
711 | ||
706546d0 | 712 | static DEFINE_PER_CPU(void *, processor_device_array); |
cd8e2b48 | 713 | |
7ec0a729 | 714 | static void acpi_processor_notify(struct acpi_device *device, u32 event) |
1da177e4 | 715 | { |
7ec0a729 | 716 | struct acpi_processor *pr = acpi_driver_data(device); |
e790cc8b | 717 | int saved; |
1da177e4 LT |
718 | |
719 | if (!pr) | |
d550d98d | 720 | return; |
1da177e4 | 721 | |
1da177e4 LT |
722 | switch (event) { |
723 | case ACPI_PROCESSOR_NOTIFY_PERFORMANCE: | |
e790cc8b | 724 | saved = pr->performance_platform_limit; |
d81c45e1 | 725 | acpi_processor_ppc_has_changed(pr, 1); |
e790cc8b AS |
726 | if (saved == pr->performance_platform_limit) |
727 | break; | |
14e04fb3 | 728 | acpi_bus_generate_proc_event(device, event, |
4be44fcd | 729 | pr->performance_platform_limit); |
962ce8ca | 730 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
0794469d | 731 | dev_name(&device->dev), event, |
962ce8ca | 732 | pr->performance_platform_limit); |
1da177e4 LT |
733 | break; |
734 | case ACPI_PROCESSOR_NOTIFY_POWER: | |
735 | acpi_processor_cst_has_changed(pr); | |
14e04fb3 | 736 | acpi_bus_generate_proc_event(device, event, 0); |
962ce8ca | 737 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
0794469d | 738 | dev_name(&device->dev), event, 0); |
1da177e4 | 739 | break; |
01854e69 LY |
740 | case ACPI_PROCESSOR_NOTIFY_THROTTLING: |
741 | acpi_processor_tstate_has_changed(pr); | |
14e04fb3 | 742 | acpi_bus_generate_proc_event(device, event, 0); |
962ce8ca | 743 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
0794469d | 744 | dev_name(&device->dev), event, 0); |
1da177e4 LT |
745 | default: |
746 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 747 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
748 | break; |
749 | } | |
750 | ||
d550d98d | 751 | return; |
1da177e4 LT |
752 | } |
753 | ||
729c6ba3 VP |
754 | static int acpi_cpu_soft_notify(struct notifier_block *nfb, |
755 | unsigned long action, void *hcpu) | |
756 | { | |
757 | unsigned int cpu = (unsigned long)hcpu; | |
706546d0 | 758 | struct acpi_processor *pr = per_cpu(processors, cpu); |
729c6ba3 VP |
759 | |
760 | if (action == CPU_ONLINE && pr) { | |
d81c45e1 | 761 | acpi_processor_ppc_has_changed(pr, 0); |
729c6ba3 VP |
762 | acpi_processor_cst_has_changed(pr); |
763 | acpi_processor_tstate_has_changed(pr); | |
764 | } | |
765 | return NOTIFY_OK; | |
766 | } | |
767 | ||
768 | static struct notifier_block acpi_cpu_notifier = | |
769 | { | |
770 | .notifier_call = acpi_cpu_soft_notify, | |
771 | }; | |
772 | ||
941b10fa | 773 | static int __cpuinit acpi_processor_add(struct acpi_device *device) |
1da177e4 | 774 | { |
4be44fcd | 775 | struct acpi_processor *pr = NULL; |
970b0492 BH |
776 | int result = 0; |
777 | struct sys_device *sysdev; | |
1da177e4 | 778 | |
36bcbec7 | 779 | pr = kzalloc(sizeof(struct acpi_processor), GFP_KERNEL); |
1da177e4 | 780 | if (!pr) |
d550d98d | 781 | return -ENOMEM; |
1da177e4 | 782 | |
eaa95840 | 783 | if (!zalloc_cpumask_var(&pr->throttling.shared_cpu_map, GFP_KERNEL)) { |
2fdf66b4 RR |
784 | kfree(pr); |
785 | return -ENOMEM; | |
786 | } | |
787 | ||
1da177e4 LT |
788 | pr->handle = device->handle; |
789 | strcpy(acpi_device_name(device), ACPI_PROCESSOR_DEVICE_NAME); | |
790 | strcpy(acpi_device_class(device), ACPI_PROCESSOR_CLASS); | |
db89b4f0 | 791 | device->driver_data = pr; |
1da177e4 | 792 | |
b26e9286 | 793 | result = acpi_processor_get_info(device); |
1da177e4 LT |
794 | if (result) { |
795 | /* Processor is physically not present */ | |
d550d98d | 796 | return 0; |
1da177e4 LT |
797 | } |
798 | ||
fbb43ab0 | 799 | BUG_ON((pr->id >= nr_cpu_ids) || (pr->id < 0)); |
1da177e4 | 800 | |
cd8e2b48 VP |
801 | /* |
802 | * Buggy BIOS check | |
803 | * ACPI id of processors can be reported wrongly by the BIOS. | |
804 | * Don't trust it blindly | |
805 | */ | |
706546d0 MT |
806 | if (per_cpu(processor_device_array, pr->id) != NULL && |
807 | per_cpu(processor_device_array, pr->id) != device) { | |
4fdb2a05 | 808 | printk(KERN_WARNING "BIOS reported wrong ACPI id " |
0eacee58 | 809 | "for the processor\n"); |
970b0492 BH |
810 | result = -ENODEV; |
811 | goto err_free_cpumask; | |
cd8e2b48 | 812 | } |
706546d0 | 813 | per_cpu(processor_device_array, pr->id) = device; |
cd8e2b48 | 814 | |
706546d0 | 815 | per_cpu(processors, pr->id) = pr; |
1da177e4 LT |
816 | |
817 | result = acpi_processor_add_fs(device); | |
818 | if (result) | |
970b0492 | 819 | goto err_free_cpumask; |
1da177e4 | 820 | |
9f1eb99c | 821 | sysdev = get_cpu_sysdev(pr->id); |
d4e05261 BH |
822 | if (sysfs_create_link(&device->dev.kobj, &sysdev->kobj, "sysdev")) { |
823 | result = -EFAULT; | |
824 | goto err_remove_fs; | |
825 | } | |
9f1eb99c | 826 | |
05131ecc VP |
827 | /* _PDC call should be done before doing anything else (if reqd.). */ |
828 | arch_acpi_processor_init_pdc(pr); | |
829 | acpi_processor_set_pdc(pr); | |
7b768f07 PV |
830 | arch_acpi_processor_cleanup_pdc(pr); |
831 | ||
0ac3c571 | 832 | #ifdef CONFIG_CPU_FREQ |
d81c45e1 | 833 | acpi_processor_ppc_has_changed(pr, 0); |
0ac3c571 ZY |
834 | #endif |
835 | acpi_processor_get_throttling_info(pr); | |
836 | acpi_processor_get_limit_info(pr); | |
837 | ||
05131ecc | 838 | |
1da177e4 LT |
839 | acpi_processor_power_init(pr, device); |
840 | ||
d9460fd2 ZR |
841 | pr->cdev = thermal_cooling_device_register("Processor", device, |
842 | &processor_cooling_ops); | |
d76628c6 TS |
843 | if (IS_ERR(pr->cdev)) { |
844 | result = PTR_ERR(pr->cdev); | |
d4e05261 | 845 | goto err_power_exit; |
d76628c6 | 846 | } |
9030062f | 847 | |
13c41157 | 848 | dev_dbg(&device->dev, "registered as cooling_device%d\n", |
fc3a8828 | 849 | pr->cdev->id); |
9030062f JL |
850 | |
851 | result = sysfs_create_link(&device->dev.kobj, | |
852 | &pr->cdev->device.kobj, | |
853 | "thermal_cooling"); | |
d4e05261 | 854 | if (result) { |
9030062f | 855 | printk(KERN_ERR PREFIX "Create sysfs link\n"); |
d4e05261 BH |
856 | goto err_thermal_unregister; |
857 | } | |
9030062f JL |
858 | result = sysfs_create_link(&pr->cdev->device.kobj, |
859 | &device->dev.kobj, | |
860 | "device"); | |
d4e05261 | 861 | if (result) { |
9030062f | 862 | printk(KERN_ERR PREFIX "Create sysfs link\n"); |
d4e05261 BH |
863 | goto err_remove_sysfs; |
864 | } | |
d9460fd2 | 865 | |
d550d98d | 866 | return 0; |
d4e05261 BH |
867 | |
868 | err_remove_sysfs: | |
869 | sysfs_remove_link(&device->dev.kobj, "thermal_cooling"); | |
870 | err_thermal_unregister: | |
871 | thermal_cooling_device_unregister(pr->cdev); | |
872 | err_power_exit: | |
873 | acpi_processor_power_exit(pr, device); | |
874 | err_remove_fs: | |
875 | acpi_processor_remove_fs(device); | |
970b0492 BH |
876 | err_free_cpumask: |
877 | free_cpumask_var(pr->throttling.shared_cpu_map); | |
1da177e4 | 878 | |
d550d98d | 879 | return result; |
1da177e4 LT |
880 | } |
881 | ||
4be44fcd | 882 | static int acpi_processor_remove(struct acpi_device *device, int type) |
1da177e4 | 883 | { |
4be44fcd | 884 | struct acpi_processor *pr = NULL; |
1da177e4 | 885 | |
1da177e4 LT |
886 | |
887 | if (!device || !acpi_driver_data(device)) | |
d550d98d | 888 | return -EINVAL; |
1da177e4 | 889 | |
50dd0969 | 890 | pr = acpi_driver_data(device); |
1da177e4 | 891 | |
2fdf66b4 RR |
892 | if (pr->id >= nr_cpu_ids) |
893 | goto free; | |
1da177e4 LT |
894 | |
895 | if (type == ACPI_BUS_REMOVAL_EJECT) { | |
896 | if (acpi_processor_handle_eject(pr)) | |
d550d98d | 897 | return -EINVAL; |
1da177e4 LT |
898 | } |
899 | ||
900 | acpi_processor_power_exit(pr, device); | |
901 | ||
9f1eb99c ZR |
902 | sysfs_remove_link(&device->dev.kobj, "sysdev"); |
903 | ||
1da177e4 LT |
904 | acpi_processor_remove_fs(device); |
905 | ||
f28bb45e ZY |
906 | if (pr->cdev) { |
907 | sysfs_remove_link(&device->dev.kobj, "thermal_cooling"); | |
908 | sysfs_remove_link(&pr->cdev->device.kobj, "device"); | |
909 | thermal_cooling_device_unregister(pr->cdev); | |
910 | pr->cdev = NULL; | |
911 | } | |
d9460fd2 | 912 | |
706546d0 MT |
913 | per_cpu(processors, pr->id) = NULL; |
914 | per_cpu(processor_device_array, pr->id) = NULL; | |
2fdf66b4 RR |
915 | |
916 | free: | |
917 | free_cpumask_var(pr->throttling.shared_cpu_map); | |
1da177e4 LT |
918 | kfree(pr); |
919 | ||
d550d98d | 920 | return 0; |
1da177e4 LT |
921 | } |
922 | ||
923 | #ifdef CONFIG_ACPI_HOTPLUG_CPU | |
924 | /**************************************************************************** | |
925 | * Acpi processor hotplug support * | |
926 | ****************************************************************************/ | |
927 | ||
4be44fcd | 928 | static int is_processor_present(acpi_handle handle) |
1da177e4 | 929 | { |
4be44fcd | 930 | acpi_status status; |
27663c58 | 931 | unsigned long long sta = 0; |
1da177e4 | 932 | |
1da177e4 LT |
933 | |
934 | status = acpi_evaluate_integer(handle, "_STA", NULL, &sta); | |
cfaf3747 ZR |
935 | |
936 | if (ACPI_SUCCESS(status) && (sta & ACPI_STA_DEVICE_PRESENT)) | |
937 | return 1; | |
938 | ||
d0ce46f5 ZR |
939 | /* |
940 | * _STA is mandatory for a processor that supports hot plug | |
941 | */ | |
942 | if (status == AE_NOT_FOUND) | |
943 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
944 | "Processor does not support hot plug\n")); | |
945 | else | |
946 | ACPI_EXCEPTION((AE_INFO, status, | |
947 | "Processor Device is not present")); | |
cfaf3747 | 948 | return 0; |
1da177e4 LT |
949 | } |
950 | ||
1da177e4 | 951 | static |
4be44fcd | 952 | int acpi_processor_device_add(acpi_handle handle, struct acpi_device **device) |
1da177e4 | 953 | { |
4be44fcd LB |
954 | acpi_handle phandle; |
955 | struct acpi_device *pdev; | |
1da177e4 | 956 | |
1da177e4 LT |
957 | |
958 | if (acpi_get_parent(handle, &phandle)) { | |
d550d98d | 959 | return -ENODEV; |
1da177e4 LT |
960 | } |
961 | ||
962 | if (acpi_bus_get_device(phandle, &pdev)) { | |
d550d98d | 963 | return -ENODEV; |
1da177e4 LT |
964 | } |
965 | ||
966 | if (acpi_bus_add(device, pdev, handle, ACPI_BUS_TYPE_PROCESSOR)) { | |
d550d98d | 967 | return -ENODEV; |
1da177e4 LT |
968 | } |
969 | ||
d550d98d | 970 | return 0; |
1da177e4 LT |
971 | } |
972 | ||
b95e9e8d SR |
973 | static void __ref acpi_processor_hotplug_notify(acpi_handle handle, |
974 | u32 event, void *data) | |
1da177e4 | 975 | { |
4be44fcd LB |
976 | struct acpi_processor *pr; |
977 | struct acpi_device *device = NULL; | |
1da177e4 LT |
978 | int result; |
979 | ||
1da177e4 LT |
980 | |
981 | switch (event) { | |
982 | case ACPI_NOTIFY_BUS_CHECK: | |
983 | case ACPI_NOTIFY_DEVICE_CHECK: | |
d6f882e1 GC |
984 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
985 | "Processor driver received %s event\n", | |
4be44fcd | 986 | (event == ACPI_NOTIFY_BUS_CHECK) ? |
d6f882e1 | 987 | "ACPI_NOTIFY_BUS_CHECK" : "ACPI_NOTIFY_DEVICE_CHECK")); |
1da177e4 LT |
988 | |
989 | if (!is_processor_present(handle)) | |
990 | break; | |
991 | ||
992 | if (acpi_bus_get_device(handle, &device)) { | |
993 | result = acpi_processor_device_add(handle, &device); | |
994 | if (result) | |
6468463a LB |
995 | printk(KERN_ERR PREFIX |
996 | "Unable to add the device\n"); | |
1da177e4 LT |
997 | break; |
998 | } | |
4be44fcd | 999 | break; |
1da177e4 | 1000 | case ACPI_NOTIFY_EJECT_REQUEST: |
4be44fcd LB |
1001 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
1002 | "received ACPI_NOTIFY_EJECT_REQUEST\n")); | |
1da177e4 LT |
1003 | |
1004 | if (acpi_bus_get_device(handle, &device)) { | |
6468463a LB |
1005 | printk(KERN_ERR PREFIX |
1006 | "Device don't exist, dropping EJECT\n"); | |
1da177e4 LT |
1007 | break; |
1008 | } | |
1009 | pr = acpi_driver_data(device); | |
1010 | if (!pr) { | |
6468463a LB |
1011 | printk(KERN_ERR PREFIX |
1012 | "Driver data is NULL, dropping EJECT\n"); | |
d550d98d | 1013 | return; |
1da177e4 | 1014 | } |
1da177e4 LT |
1015 | break; |
1016 | default: | |
1017 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 1018 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
1019 | break; |
1020 | } | |
1021 | ||
d550d98d | 1022 | return; |
1da177e4 LT |
1023 | } |
1024 | ||
1025 | static acpi_status | |
1026 | processor_walk_namespace_cb(acpi_handle handle, | |
4be44fcd | 1027 | u32 lvl, void *context, void **rv) |
1da177e4 | 1028 | { |
4be44fcd | 1029 | acpi_status status; |
1da177e4 | 1030 | int *action = context; |
4be44fcd | 1031 | acpi_object_type type = 0; |
1da177e4 LT |
1032 | |
1033 | status = acpi_get_type(handle, &type); | |
1034 | if (ACPI_FAILURE(status)) | |
4be44fcd | 1035 | return (AE_OK); |
1da177e4 LT |
1036 | |
1037 | if (type != ACPI_TYPE_PROCESSOR) | |
4be44fcd | 1038 | return (AE_OK); |
1da177e4 | 1039 | |
4be44fcd | 1040 | switch (*action) { |
1da177e4 LT |
1041 | case INSTALL_NOTIFY_HANDLER: |
1042 | acpi_install_notify_handler(handle, | |
4be44fcd LB |
1043 | ACPI_SYSTEM_NOTIFY, |
1044 | acpi_processor_hotplug_notify, | |
1045 | NULL); | |
1da177e4 LT |
1046 | break; |
1047 | case UNINSTALL_NOTIFY_HANDLER: | |
1048 | acpi_remove_notify_handler(handle, | |
4be44fcd LB |
1049 | ACPI_SYSTEM_NOTIFY, |
1050 | acpi_processor_hotplug_notify); | |
1da177e4 LT |
1051 | break; |
1052 | default: | |
1053 | break; | |
1054 | } | |
1055 | ||
4be44fcd | 1056 | return (AE_OK); |
1da177e4 LT |
1057 | } |
1058 | ||
4be44fcd | 1059 | static acpi_status acpi_processor_hotadd_init(acpi_handle handle, int *p_cpu) |
1da177e4 | 1060 | { |
1da177e4 LT |
1061 | |
1062 | if (!is_processor_present(handle)) { | |
d550d98d | 1063 | return AE_ERROR; |
1da177e4 LT |
1064 | } |
1065 | ||
1066 | if (acpi_map_lsapic(handle, p_cpu)) | |
d550d98d | 1067 | return AE_ERROR; |
1da177e4 LT |
1068 | |
1069 | if (arch_register_cpu(*p_cpu)) { | |
1070 | acpi_unmap_lsapic(*p_cpu); | |
d550d98d | 1071 | return AE_ERROR; |
1da177e4 LT |
1072 | } |
1073 | ||
d550d98d | 1074 | return AE_OK; |
1da177e4 LT |
1075 | } |
1076 | ||
4be44fcd | 1077 | static int acpi_processor_handle_eject(struct acpi_processor *pr) |
1da177e4 | 1078 | { |
b62b8ef9 ZR |
1079 | if (cpu_online(pr->id)) |
1080 | cpu_down(pr->id); | |
1081 | ||
1da177e4 LT |
1082 | arch_unregister_cpu(pr->id); |
1083 | acpi_unmap_lsapic(pr->id); | |
4be44fcd | 1084 | return (0); |
1da177e4 LT |
1085 | } |
1086 | #else | |
4be44fcd | 1087 | static acpi_status acpi_processor_hotadd_init(acpi_handle handle, int *p_cpu) |
1da177e4 LT |
1088 | { |
1089 | return AE_ERROR; | |
1090 | } | |
4be44fcd | 1091 | static int acpi_processor_handle_eject(struct acpi_processor *pr) |
1da177e4 | 1092 | { |
4be44fcd | 1093 | return (-EINVAL); |
1da177e4 LT |
1094 | } |
1095 | #endif | |
1096 | ||
1da177e4 LT |
1097 | static |
1098 | void acpi_processor_install_hotplug_notify(void) | |
1099 | { | |
1100 | #ifdef CONFIG_ACPI_HOTPLUG_CPU | |
1101 | int action = INSTALL_NOTIFY_HANDLER; | |
1102 | acpi_walk_namespace(ACPI_TYPE_PROCESSOR, | |
4be44fcd LB |
1103 | ACPI_ROOT_OBJECT, |
1104 | ACPI_UINT32_MAX, | |
2263576c | 1105 | processor_walk_namespace_cb, NULL, &action, NULL); |
1da177e4 | 1106 | #endif |
729c6ba3 | 1107 | register_hotcpu_notifier(&acpi_cpu_notifier); |
1da177e4 LT |
1108 | } |
1109 | ||
1da177e4 LT |
1110 | static |
1111 | void acpi_processor_uninstall_hotplug_notify(void) | |
1112 | { | |
1113 | #ifdef CONFIG_ACPI_HOTPLUG_CPU | |
1114 | int action = UNINSTALL_NOTIFY_HANDLER; | |
1115 | acpi_walk_namespace(ACPI_TYPE_PROCESSOR, | |
4be44fcd LB |
1116 | ACPI_ROOT_OBJECT, |
1117 | ACPI_UINT32_MAX, | |
2263576c | 1118 | processor_walk_namespace_cb, NULL, &action, NULL); |
1da177e4 | 1119 | #endif |
729c6ba3 | 1120 | unregister_hotcpu_notifier(&acpi_cpu_notifier); |
1da177e4 LT |
1121 | } |
1122 | ||
1123 | /* | |
1124 | * We keep the driver loaded even when ACPI is not running. | |
1125 | * This is needed for the powernow-k8 driver, that works even without | |
1126 | * ACPI, but needs symbols from this driver | |
1127 | */ | |
1128 | ||
4be44fcd | 1129 | static int __init acpi_processor_init(void) |
1da177e4 | 1130 | { |
4be44fcd | 1131 | int result = 0; |
1da177e4 | 1132 | |
ce8442b5 YL |
1133 | if (acpi_disabled) |
1134 | return 0; | |
1135 | ||
1da177e4 LT |
1136 | memset(&errata, 0, sizeof(errata)); |
1137 | ||
f18c5a08 AS |
1138 | #ifdef CONFIG_SMP |
1139 | if (ACPI_FAILURE(acpi_get_table(ACPI_SIG_MADT, 0, | |
1140 | (struct acpi_table_header **)&madt))) | |
70c0846e | 1141 | madt = NULL; |
f18c5a08 | 1142 | #endif |
74cad4ee | 1143 | #ifdef CONFIG_ACPI_PROCFS |
1da177e4 LT |
1144 | acpi_processor_dir = proc_mkdir(ACPI_PROCESSOR_CLASS, acpi_root_dir); |
1145 | if (!acpi_processor_dir) | |
83822fc9 | 1146 | return -ENOMEM; |
74cad4ee | 1147 | #endif |
2a2a6471 ZY |
1148 | /* |
1149 | * Check whether the system is DMI table. If yes, OSPM | |
1150 | * should not use mwait for CPU-states. | |
1151 | */ | |
1152 | dmi_check_system(processor_idle_dmi_table); | |
4f86d3a8 LB |
1153 | result = cpuidle_register_driver(&acpi_idle_driver); |
1154 | if (result < 0) | |
1155 | goto out_proc; | |
1156 | ||
1da177e4 | 1157 | result = acpi_bus_register_driver(&acpi_processor_driver); |
4f86d3a8 LB |
1158 | if (result < 0) |
1159 | goto out_cpuidle; | |
1da177e4 LT |
1160 | |
1161 | acpi_processor_install_hotplug_notify(); | |
1162 | ||
1163 | acpi_thermal_cpufreq_init(); | |
1164 | ||
1165 | acpi_processor_ppc_init(); | |
1166 | ||
1180509f ZY |
1167 | acpi_processor_throttling_init(); |
1168 | ||
d550d98d | 1169 | return 0; |
4f86d3a8 LB |
1170 | |
1171 | out_cpuidle: | |
1172 | cpuidle_unregister_driver(&acpi_idle_driver); | |
1173 | ||
1174 | out_proc: | |
74cad4ee | 1175 | #ifdef CONFIG_ACPI_PROCFS |
4f86d3a8 | 1176 | remove_proc_entry(ACPI_PROCESSOR_CLASS, acpi_root_dir); |
74cad4ee | 1177 | #endif |
4f86d3a8 LB |
1178 | |
1179 | return result; | |
1da177e4 LT |
1180 | } |
1181 | ||
4be44fcd | 1182 | static void __exit acpi_processor_exit(void) |
1da177e4 | 1183 | { |
ce8442b5 YL |
1184 | if (acpi_disabled) |
1185 | return; | |
1186 | ||
1da177e4 LT |
1187 | acpi_processor_ppc_exit(); |
1188 | ||
1189 | acpi_thermal_cpufreq_exit(); | |
1190 | ||
1191 | acpi_processor_uninstall_hotplug_notify(); | |
1192 | ||
1193 | acpi_bus_unregister_driver(&acpi_processor_driver); | |
1194 | ||
4f86d3a8 LB |
1195 | cpuidle_unregister_driver(&acpi_idle_driver); |
1196 | ||
74cad4ee | 1197 | #ifdef CONFIG_ACPI_PROCFS |
1da177e4 | 1198 | remove_proc_entry(ACPI_PROCESSOR_CLASS, acpi_root_dir); |
74cad4ee | 1199 | #endif |
1da177e4 | 1200 | |
d550d98d | 1201 | return; |
1da177e4 LT |
1202 | } |
1203 | ||
1da177e4 LT |
1204 | module_init(acpi_processor_init); |
1205 | module_exit(acpi_processor_exit); | |
1206 | ||
1207 | EXPORT_SYMBOL(acpi_processor_set_thermal_limit); | |
1208 | ||
1209 | MODULE_ALIAS("processor"); |