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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 | 62 | #define ACPI_PROCESSOR_CLASS "processor" |
1da177e4 LT |
63 | #define ACPI_PROCESSOR_DEVICE_NAME "Processor" |
64 | #define ACPI_PROCESSOR_FILE_INFO "info" | |
65 | #define ACPI_PROCESSOR_FILE_THROTTLING "throttling" | |
66 | #define ACPI_PROCESSOR_FILE_LIMIT "limit" | |
67 | #define ACPI_PROCESSOR_NOTIFY_PERFORMANCE 0x80 | |
68 | #define ACPI_PROCESSOR_NOTIFY_POWER 0x81 | |
01854e69 | 69 | #define ACPI_PROCESSOR_NOTIFY_THROTTLING 0x82 |
1da177e4 LT |
70 | |
71 | #define ACPI_PROCESSOR_LIMIT_USER 0 | |
72 | #define ACPI_PROCESSOR_LIMIT_THERMAL 1 | |
73 | ||
1da177e4 | 74 | #define _COMPONENT ACPI_PROCESSOR_COMPONENT |
f52fd66d | 75 | ACPI_MODULE_NAME("processor_core"); |
1da177e4 | 76 | |
f52fd66d | 77 | MODULE_AUTHOR("Paul Diefenbaugh"); |
7cda93e0 | 78 | MODULE_DESCRIPTION("ACPI Processor Driver"); |
1da177e4 LT |
79 | MODULE_LICENSE("GPL"); |
80 | ||
4be44fcd LB |
81 | static int acpi_processor_add(struct acpi_device *device); |
82 | static int acpi_processor_start(struct acpi_device *device); | |
83 | static int acpi_processor_remove(struct acpi_device *device, int type); | |
1da177e4 | 84 | static int acpi_processor_info_open_fs(struct inode *inode, struct file *file); |
7ec0a729 | 85 | static void acpi_processor_notify(struct acpi_device *device, u32 event); |
1da177e4 LT |
86 | static acpi_status acpi_processor_hotadd_init(acpi_handle handle, int *p_cpu); |
87 | static int acpi_processor_handle_eject(struct acpi_processor *pr); | |
01854e69 | 88 | |
1da177e4 | 89 | |
1ba90e3a | 90 | static const struct acpi_device_id processor_device_ids[] = { |
ad93a765 | 91 | {ACPI_PROCESSOR_OBJECT_HID, 0}, |
1ba90e3a TR |
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, | |
7ec0a729 | 107 | .notify = acpi_processor_notify, |
4be44fcd | 108 | }, |
1da177e4 LT |
109 | }; |
110 | ||
111 | #define INSTALL_NOTIFY_HANDLER 1 | |
112 | #define UNINSTALL_NOTIFY_HANDLER 2 | |
113 | ||
d7508032 | 114 | static const struct file_operations acpi_processor_info_fops = { |
cf7acfab | 115 | .owner = THIS_MODULE, |
4be44fcd LB |
116 | .open = acpi_processor_info_open_fs, |
117 | .read = seq_read, | |
118 | .llseek = seq_lseek, | |
119 | .release = single_release, | |
1da177e4 LT |
120 | }; |
121 | ||
706546d0 | 122 | DEFINE_PER_CPU(struct acpi_processor *, processors); |
9f222718 | 123 | struct acpi_processor_errata errata __read_mostly; |
2a2a6471 ZY |
124 | static int set_no_mwait(const struct dmi_system_id *id) |
125 | { | |
126 | printk(KERN_NOTICE PREFIX "%s detected - " | |
d0057413 | 127 | "disabling mwait for CPU C-states\n", id->ident); |
2a2a6471 ZY |
128 | idle_nomwait = 1; |
129 | return 0; | |
130 | } | |
131 | ||
132 | static struct dmi_system_id __cpuinitdata processor_idle_dmi_table[] = { | |
133 | { | |
134 | set_no_mwait, "IFL91 board", { | |
135 | DMI_MATCH(DMI_BIOS_VENDOR, "COMPAL"), | |
136 | DMI_MATCH(DMI_SYS_VENDOR, "ZEPTO"), | |
137 | DMI_MATCH(DMI_PRODUCT_VERSION, "3215W"), | |
138 | DMI_MATCH(DMI_BOARD_NAME, "IFL91") }, NULL}, | |
139 | { | |
140 | set_no_mwait, "Extensa 5220", { | |
141 | DMI_MATCH(DMI_BIOS_VENDOR, "Phoenix Technologies LTD"), | |
3df8a905 | 142 | DMI_MATCH(DMI_SYS_VENDOR, "Acer"), |
2a2a6471 ZY |
143 | DMI_MATCH(DMI_PRODUCT_VERSION, "0100"), |
144 | DMI_MATCH(DMI_BOARD_NAME, "Columbia") }, NULL}, | |
145 | {}, | |
146 | }; | |
1da177e4 | 147 | |
1da177e4 LT |
148 | /* -------------------------------------------------------------------------- |
149 | Errata Handling | |
150 | -------------------------------------------------------------------------- */ | |
151 | ||
4be44fcd | 152 | static int acpi_processor_errata_piix4(struct pci_dev *dev) |
1da177e4 | 153 | { |
4be44fcd LB |
154 | u8 value1 = 0; |
155 | u8 value2 = 0; | |
1da177e4 | 156 | |
1da177e4 LT |
157 | |
158 | if (!dev) | |
d550d98d | 159 | return -EINVAL; |
1da177e4 LT |
160 | |
161 | /* | |
162 | * Note that 'dev' references the PIIX4 ACPI Controller. | |
163 | */ | |
164 | ||
44c10138 | 165 | switch (dev->revision) { |
1da177e4 LT |
166 | case 0: |
167 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found PIIX4 A-step\n")); | |
168 | break; | |
169 | case 1: | |
170 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found PIIX4 B-step\n")); | |
171 | break; | |
172 | case 2: | |
173 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found PIIX4E\n")); | |
174 | break; | |
175 | case 3: | |
176 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found PIIX4M\n")); | |
177 | break; | |
178 | default: | |
179 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found unknown PIIX4\n")); | |
180 | break; | |
181 | } | |
182 | ||
44c10138 | 183 | switch (dev->revision) { |
1da177e4 LT |
184 | |
185 | case 0: /* PIIX4 A-step */ | |
186 | case 1: /* PIIX4 B-step */ | |
187 | /* | |
188 | * See specification changes #13 ("Manual Throttle Duty Cycle") | |
189 | * and #14 ("Enabling and Disabling Manual Throttle"), plus | |
190 | * erratum #5 ("STPCLK# Deassertion Time") from the January | |
191 | * 2002 PIIX4 specification update. Applies to only older | |
192 | * PIIX4 models. | |
193 | */ | |
194 | errata.piix4.throttle = 1; | |
195 | ||
196 | case 2: /* PIIX4E */ | |
197 | case 3: /* PIIX4M */ | |
198 | /* | |
199 | * See erratum #18 ("C3 Power State/BMIDE and Type-F DMA | |
200 | * Livelock") from the January 2002 PIIX4 specification update. | |
201 | * Applies to all PIIX4 models. | |
202 | */ | |
203 | ||
204 | /* | |
205 | * BM-IDE | |
206 | * ------ | |
207 | * Find the PIIX4 IDE Controller and get the Bus Master IDE | |
208 | * Status register address. We'll use this later to read | |
209 | * each IDE controller's DMA status to make sure we catch all | |
210 | * DMA activity. | |
211 | */ | |
212 | dev = pci_get_subsys(PCI_VENDOR_ID_INTEL, | |
4be44fcd LB |
213 | PCI_DEVICE_ID_INTEL_82371AB, |
214 | PCI_ANY_ID, PCI_ANY_ID, NULL); | |
1da177e4 LT |
215 | if (dev) { |
216 | errata.piix4.bmisx = pci_resource_start(dev, 4); | |
217 | pci_dev_put(dev); | |
218 | } | |
219 | ||
220 | /* | |
221 | * Type-F DMA | |
222 | * ---------- | |
223 | * Find the PIIX4 ISA Controller and read the Motherboard | |
224 | * DMA controller's status to see if Type-F (Fast) DMA mode | |
225 | * is enabled (bit 7) on either channel. Note that we'll | |
226 | * disable C3 support if this is enabled, as some legacy | |
227 | * devices won't operate well if fast DMA is disabled. | |
228 | */ | |
229 | dev = pci_get_subsys(PCI_VENDOR_ID_INTEL, | |
4be44fcd LB |
230 | PCI_DEVICE_ID_INTEL_82371AB_0, |
231 | PCI_ANY_ID, PCI_ANY_ID, NULL); | |
1da177e4 LT |
232 | if (dev) { |
233 | pci_read_config_byte(dev, 0x76, &value1); | |
234 | pci_read_config_byte(dev, 0x77, &value2); | |
235 | if ((value1 & 0x80) || (value2 & 0x80)) | |
236 | errata.piix4.fdma = 1; | |
237 | pci_dev_put(dev); | |
238 | } | |
239 | ||
240 | break; | |
241 | } | |
242 | ||
243 | if (errata.piix4.bmisx) | |
244 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 245 | "Bus master activity detection (BM-IDE) erratum enabled\n")); |
1da177e4 LT |
246 | if (errata.piix4.fdma) |
247 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 248 | "Type-F DMA livelock erratum (C3 disabled)\n")); |
1da177e4 | 249 | |
d550d98d | 250 | return 0; |
1da177e4 LT |
251 | } |
252 | ||
8713cbef | 253 | static int acpi_processor_errata(struct acpi_processor *pr) |
1da177e4 | 254 | { |
4be44fcd LB |
255 | int result = 0; |
256 | struct pci_dev *dev = NULL; | |
1da177e4 | 257 | |
1da177e4 LT |
258 | |
259 | if (!pr) | |
d550d98d | 260 | return -EINVAL; |
1da177e4 LT |
261 | |
262 | /* | |
263 | * PIIX4 | |
264 | */ | |
265 | dev = pci_get_subsys(PCI_VENDOR_ID_INTEL, | |
4be44fcd LB |
266 | PCI_DEVICE_ID_INTEL_82371AB_3, PCI_ANY_ID, |
267 | PCI_ANY_ID, NULL); | |
1da177e4 LT |
268 | if (dev) { |
269 | result = acpi_processor_errata_piix4(dev); | |
270 | pci_dev_put(dev); | |
271 | } | |
272 | ||
d550d98d | 273 | return result; |
1da177e4 LT |
274 | } |
275 | ||
02df8b93 | 276 | /* -------------------------------------------------------------------------- |
0b28002f | 277 | Common ACPI processor functions |
02df8b93 VP |
278 | -------------------------------------------------------------------------- */ |
279 | ||
280 | /* | |
281 | * _PDC is required for a BIOS-OS handshake for most of the newer | |
282 | * ACPI processor features. | |
283 | */ | |
05131ecc | 284 | static int acpi_processor_set_pdc(struct acpi_processor *pr) |
02df8b93 | 285 | { |
05131ecc | 286 | struct acpi_object_list *pdc_in = pr->pdc; |
4be44fcd | 287 | acpi_status status = AE_OK; |
02df8b93 | 288 | |
02df8b93 | 289 | |
05131ecc | 290 | if (!pdc_in) |
d550d98d | 291 | return status; |
da5e09a1 ZY |
292 | if (idle_nomwait) { |
293 | /* | |
294 | * If mwait is disabled for CPU C-states, the C2C3_FFH access | |
295 | * mode will be disabled in the parameter of _PDC object. | |
296 | * Of course C1_FFH access mode will also be disabled. | |
297 | */ | |
298 | union acpi_object *obj; | |
299 | u32 *buffer = NULL; | |
02df8b93 | 300 | |
da5e09a1 ZY |
301 | obj = pdc_in->pointer; |
302 | buffer = (u32 *)(obj->buffer.pointer); | |
303 | buffer[2] &= ~(ACPI_PDC_C_C2C3_FFH | ACPI_PDC_C_C1_FFH); | |
304 | ||
305 | } | |
05131ecc | 306 | status = acpi_evaluate_object(pr->handle, "_PDC", pdc_in, NULL); |
02df8b93 | 307 | |
05131ecc | 308 | if (ACPI_FAILURE(status)) |
4be44fcd | 309 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
05131ecc | 310 | "Could not evaluate _PDC, using legacy perf. control...\n")); |
02df8b93 | 311 | |
d550d98d | 312 | return status; |
02df8b93 VP |
313 | } |
314 | ||
1da177e4 LT |
315 | /* -------------------------------------------------------------------------- |
316 | FS Interface (/proc) | |
317 | -------------------------------------------------------------------------- */ | |
318 | ||
4be44fcd | 319 | static struct proc_dir_entry *acpi_processor_dir = NULL; |
1da177e4 LT |
320 | |
321 | static int acpi_processor_info_seq_show(struct seq_file *seq, void *offset) | |
322 | { | |
50dd0969 | 323 | struct acpi_processor *pr = seq->private; |
1da177e4 | 324 | |
1da177e4 LT |
325 | |
326 | if (!pr) | |
327 | goto end; | |
328 | ||
329 | seq_printf(seq, "processor id: %d\n" | |
4be44fcd LB |
330 | "acpi id: %d\n" |
331 | "bus mastering control: %s\n" | |
332 | "power management: %s\n" | |
333 | "throttling control: %s\n" | |
334 | "limit interface: %s\n", | |
335 | pr->id, | |
336 | pr->acpi_id, | |
337 | pr->flags.bm_control ? "yes" : "no", | |
338 | pr->flags.power ? "yes" : "no", | |
339 | pr->flags.throttling ? "yes" : "no", | |
340 | pr->flags.limit ? "yes" : "no"); | |
341 | ||
342 | end: | |
d550d98d | 343 | return 0; |
1da177e4 LT |
344 | } |
345 | ||
346 | static int acpi_processor_info_open_fs(struct inode *inode, struct file *file) | |
347 | { | |
348 | return single_open(file, acpi_processor_info_seq_show, | |
4be44fcd | 349 | PDE(inode)->data); |
1da177e4 LT |
350 | } |
351 | ||
4be44fcd | 352 | static int acpi_processor_add_fs(struct acpi_device *device) |
1da177e4 | 353 | { |
4be44fcd | 354 | struct proc_dir_entry *entry = NULL; |
1da177e4 | 355 | |
1da177e4 LT |
356 | |
357 | if (!acpi_device_dir(device)) { | |
358 | acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), | |
4be44fcd | 359 | acpi_processor_dir); |
1da177e4 | 360 | if (!acpi_device_dir(device)) |
d550d98d | 361 | return -ENODEV; |
1da177e4 | 362 | } |
1da177e4 LT |
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 |
b26e9286 | 412 | static int get_cpu_id(acpi_handle handle, int type, 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 | ||
7237d3de SS |
430 | static int map_x2apic_id(struct acpi_subtable_header *entry, |
431 | int device_declaration, u32 acpi_id, int *apic_id) | |
432 | { | |
433 | struct acpi_madt_local_x2apic *apic = | |
434 | (struct acpi_madt_local_x2apic *)entry; | |
435 | u32 tmp = apic->local_apic_id; | |
436 | ||
437 | /* Only check enabled APICs*/ | |
438 | if (!(apic->lapic_flags & ACPI_MADT_ENABLED)) | |
439 | return 0; | |
440 | ||
441 | /* Device statement declaration type */ | |
442 | if (device_declaration) { | |
443 | if (apic->uid == acpi_id) | |
444 | goto found; | |
445 | } | |
446 | ||
447 | return 0; | |
448 | found: | |
449 | *apic_id = tmp; | |
450 | return 1; | |
451 | } | |
452 | ||
f18c5a08 | 453 | static int map_lsapic_id(struct acpi_subtable_header *entry, |
b26e9286 | 454 | int device_declaration, u32 acpi_id, int *apic_id) |
f18c5a08 AS |
455 | { |
456 | struct acpi_madt_local_sapic *lsapic = | |
457 | (struct acpi_madt_local_sapic *)entry; | |
b26e9286 MS |
458 | u32 tmp = (lsapic->id << 8) | lsapic->eid; |
459 | ||
f18c5a08 | 460 | /* Only check enabled APICs*/ |
b26e9286 MS |
461 | if (!(lsapic->lapic_flags & ACPI_MADT_ENABLED)) |
462 | return 0; | |
463 | ||
464 | /* Device statement declaration type */ | |
465 | if (device_declaration) { | |
466 | if (entry->length < 16) | |
467 | printk(KERN_ERR PREFIX | |
468 | "Invalid LSAPIC with Device type processor (SAPIC ID %#x)\n", | |
469 | tmp); | |
470 | else if (lsapic->uid == acpi_id) | |
471 | goto found; | |
472 | /* Processor statement declaration type */ | |
473 | } else if (lsapic->processor_id == acpi_id) | |
474 | goto found; | |
475 | ||
f18c5a08 | 476 | return 0; |
b26e9286 MS |
477 | found: |
478 | *apic_id = tmp; | |
479 | return 1; | |
f18c5a08 AS |
480 | } |
481 | ||
b26e9286 | 482 | static int map_madt_entry(int type, u32 acpi_id) |
f18c5a08 AS |
483 | { |
484 | unsigned long madt_end, entry; | |
485 | int apic_id = -1; | |
486 | ||
487 | if (!madt) | |
488 | return apic_id; | |
489 | ||
490 | entry = (unsigned long)madt; | |
491 | madt_end = entry + madt->header.length; | |
492 | ||
493 | /* Parse all entries looking for a match. */ | |
494 | ||
495 | entry += sizeof(struct acpi_table_madt); | |
496 | while (entry + sizeof(struct acpi_subtable_header) < madt_end) { | |
497 | struct acpi_subtable_header *header = | |
498 | (struct acpi_subtable_header *)entry; | |
499 | if (header->type == ACPI_MADT_TYPE_LOCAL_APIC) { | |
500 | if (map_lapic_id(header, acpi_id, &apic_id)) | |
501 | break; | |
7237d3de SS |
502 | } else if (header->type == ACPI_MADT_TYPE_LOCAL_X2APIC) { |
503 | if (map_x2apic_id(header, type, acpi_id, &apic_id)) | |
504 | break; | |
f18c5a08 | 505 | } else if (header->type == ACPI_MADT_TYPE_LOCAL_SAPIC) { |
b26e9286 | 506 | if (map_lsapic_id(header, type, acpi_id, &apic_id)) |
f18c5a08 AS |
507 | break; |
508 | } | |
509 | entry += header->length; | |
510 | } | |
511 | return apic_id; | |
512 | } | |
513 | ||
b26e9286 | 514 | static int map_mat_entry(acpi_handle handle, int type, u32 acpi_id) |
f18c5a08 AS |
515 | { |
516 | struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; | |
517 | union acpi_object *obj; | |
518 | struct acpi_subtable_header *header; | |
519 | int apic_id = -1; | |
520 | ||
521 | if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer))) | |
522 | goto exit; | |
523 | ||
524 | if (!buffer.length || !buffer.pointer) | |
525 | goto exit; | |
526 | ||
527 | obj = buffer.pointer; | |
528 | if (obj->type != ACPI_TYPE_BUFFER || | |
529 | obj->buffer.length < sizeof(struct acpi_subtable_header)) { | |
530 | goto exit; | |
531 | } | |
532 | ||
533 | header = (struct acpi_subtable_header *)obj->buffer.pointer; | |
534 | if (header->type == ACPI_MADT_TYPE_LOCAL_APIC) { | |
535 | map_lapic_id(header, acpi_id, &apic_id); | |
536 | } else if (header->type == ACPI_MADT_TYPE_LOCAL_SAPIC) { | |
b26e9286 | 537 | map_lsapic_id(header, type, acpi_id, &apic_id); |
f18c5a08 AS |
538 | } |
539 | ||
540 | exit: | |
541 | if (buffer.pointer) | |
542 | kfree(buffer.pointer); | |
543 | return apic_id; | |
544 | } | |
545 | ||
b26e9286 | 546 | static int get_cpu_id(acpi_handle handle, int type, u32 acpi_id) |
1da177e4 | 547 | { |
4a35a46b | 548 | int i; |
f18c5a08 | 549 | int apic_id = -1; |
1da177e4 | 550 | |
b26e9286 | 551 | apic_id = map_mat_entry(handle, type, acpi_id); |
f18c5a08 | 552 | if (apic_id == -1) |
b26e9286 | 553 | apic_id = map_madt_entry(type, acpi_id); |
f18c5a08 AS |
554 | if (apic_id == -1) |
555 | return apic_id; | |
1da177e4 | 556 | |
fbb43ab0 | 557 | for_each_possible_cpu(i) { |
71b31233 | 558 | if (cpu_physical_id(i) == apic_id) |
4a35a46b | 559 | return i; |
1da177e4 LT |
560 | } |
561 | return -1; | |
562 | } | |
563 | #endif | |
564 | ||
565 | /* -------------------------------------------------------------------------- | |
566 | Driver Interface | |
567 | -------------------------------------------------------------------------- */ | |
568 | ||
b26e9286 | 569 | static int acpi_processor_get_info(struct acpi_device *device) |
1da177e4 | 570 | { |
4be44fcd LB |
571 | acpi_status status = 0; |
572 | union acpi_object object = { 0 }; | |
573 | struct acpi_buffer buffer = { sizeof(union acpi_object), &object }; | |
b26e9286 MS |
574 | struct acpi_processor *pr; |
575 | int cpu_index, device_declaration = 0; | |
4be44fcd | 576 | static int cpu0_initialized; |
1da177e4 | 577 | |
b26e9286 | 578 | pr = acpi_driver_data(device); |
1da177e4 | 579 | if (!pr) |
d550d98d | 580 | return -EINVAL; |
1da177e4 LT |
581 | |
582 | if (num_online_cpus() > 1) | |
583 | errata.smp = TRUE; | |
584 | ||
585 | acpi_processor_errata(pr); | |
586 | ||
587 | /* | |
588 | * Check to see if we have bus mastering arbitration control. This | |
589 | * is required for proper C3 usage (to maintain cache coherency). | |
590 | */ | |
cee324b1 | 591 | if (acpi_gbl_FADT.pm2_control_block && acpi_gbl_FADT.pm2_control_length) { |
1da177e4 LT |
592 | pr->flags.bm_control = 1; |
593 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd LB |
594 | "Bus mastering arbitration control present\n")); |
595 | } else | |
1da177e4 | 596 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
4be44fcd | 597 | "No bus mastering arbitration control\n")); |
1da177e4 | 598 | |
b26e9286 MS |
599 | if (!strcmp(acpi_device_hid(device), ACPI_PROCESSOR_HID)) { |
600 | /* | |
601 | * Declared with "Device" statement; match _UID. | |
602 | * Note that we don't handle string _UIDs yet. | |
603 | */ | |
27663c58 | 604 | unsigned long long value; |
11bf04c4 AS |
605 | status = acpi_evaluate_integer(pr->handle, METHOD_NAME__UID, |
606 | NULL, &value); | |
607 | if (ACPI_FAILURE(status)) { | |
b26e9286 MS |
608 | printk(KERN_ERR PREFIX |
609 | "Evaluating processor _UID [%#x]\n", status); | |
11bf04c4 AS |
610 | return -ENODEV; |
611 | } | |
b26e9286 | 612 | device_declaration = 1; |
11bf04c4 AS |
613 | pr->acpi_id = value; |
614 | } else { | |
b26e9286 | 615 | /* Declared with "Processor" statement; match ProcessorID */ |
11bf04c4 AS |
616 | status = acpi_evaluate_object(pr->handle, NULL, NULL, &buffer); |
617 | if (ACPI_FAILURE(status)) { | |
618 | printk(KERN_ERR PREFIX "Evaluating processor object\n"); | |
619 | return -ENODEV; | |
620 | } | |
1da177e4 | 621 | |
11bf04c4 | 622 | /* |
5b53ed69 MS |
623 | * TBD: Synch processor ID (via LAPIC/LSAPIC structures) on SMP. |
624 | * >>> 'acpi_get_processor_id(acpi_id, &id)' in | |
625 | * arch/xxx/acpi.c | |
626 | */ | |
11bf04c4 AS |
627 | pr->acpi_id = object.processor.proc_id; |
628 | } | |
b26e9286 | 629 | cpu_index = get_cpu_id(pr->handle, device_declaration, pr->acpi_id); |
1da177e4 | 630 | |
4be44fcd | 631 | /* Handle UP system running SMP kernel, with no LAPIC in MADT */ |
df42baa0 | 632 | if (!cpu0_initialized && (cpu_index == -1) && |
4be44fcd LB |
633 | (num_online_cpus() == 1)) { |
634 | cpu_index = 0; | |
635 | } | |
636 | ||
637 | cpu0_initialized = 1; | |
638 | ||
639 | pr->id = cpu_index; | |
640 | ||
641 | /* | |
642 | * Extra Processor objects may be enumerated on MP systems with | |
643 | * less than the max # of CPUs. They should be ignored _iff | |
644 | * they are physically not present. | |
645 | */ | |
f18c5a08 | 646 | if (pr->id == -1) { |
4be44fcd LB |
647 | if (ACPI_FAILURE |
648 | (acpi_processor_hotadd_init(pr->handle, &pr->id))) { | |
d550d98d | 649 | return -ENODEV; |
4be44fcd LB |
650 | } |
651 | } | |
1da177e4 LT |
652 | |
653 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Processor [%d:%d]\n", pr->id, | |
4be44fcd | 654 | pr->acpi_id)); |
1da177e4 LT |
655 | |
656 | if (!object.processor.pblk_address) | |
657 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No PBLK (NULL address)\n")); | |
658 | else if (object.processor.pblk_length != 6) | |
6468463a LB |
659 | printk(KERN_ERR PREFIX "Invalid PBLK length [%d]\n", |
660 | object.processor.pblk_length); | |
1da177e4 LT |
661 | else { |
662 | pr->throttling.address = object.processor.pblk_address; | |
cee324b1 AS |
663 | pr->throttling.duty_offset = acpi_gbl_FADT.duty_offset; |
664 | pr->throttling.duty_width = acpi_gbl_FADT.duty_width; | |
1da177e4 LT |
665 | |
666 | pr->pblk = object.processor.pblk_address; | |
667 | ||
668 | /* | |
669 | * We don't care about error returns - we just try to mark | |
670 | * these reserved so that nobody else is confused into thinking | |
671 | * that this region might be unused.. | |
672 | * | |
673 | * (In particular, allocating the IO range for Cardbus) | |
674 | */ | |
675 | request_region(pr->throttling.address, 6, "ACPI CPU throttle"); | |
676 | } | |
677 | ||
fe086a7b AC |
678 | /* |
679 | * If ACPI describes a slot number for this CPU, we can use it | |
680 | * ensure we get the right value in the "physical id" field | |
681 | * of /proc/cpuinfo | |
682 | */ | |
683 | status = acpi_evaluate_object(pr->handle, "_SUN", NULL, &buffer); | |
684 | if (ACPI_SUCCESS(status)) | |
685 | arch_fix_phys_package_id(pr->id, object.integer.value); | |
686 | ||
d550d98d | 687 | return 0; |
1da177e4 LT |
688 | } |
689 | ||
706546d0 | 690 | static DEFINE_PER_CPU(void *, processor_device_array); |
cd8e2b48 | 691 | |
7af8b660 | 692 | static int __cpuinit acpi_processor_start(struct acpi_device *device) |
1da177e4 | 693 | { |
4be44fcd | 694 | int result = 0; |
4be44fcd | 695 | struct acpi_processor *pr; |
9f1eb99c | 696 | struct sys_device *sysdev; |
1da177e4 LT |
697 | |
698 | pr = acpi_driver_data(device); | |
699 | ||
b26e9286 | 700 | result = acpi_processor_get_info(device); |
1da177e4 LT |
701 | if (result) { |
702 | /* Processor is physically not present */ | |
d550d98d | 703 | return 0; |
1da177e4 LT |
704 | } |
705 | ||
fbb43ab0 | 706 | BUG_ON((pr->id >= nr_cpu_ids) || (pr->id < 0)); |
1da177e4 | 707 | |
cd8e2b48 VP |
708 | /* |
709 | * Buggy BIOS check | |
710 | * ACPI id of processors can be reported wrongly by the BIOS. | |
711 | * Don't trust it blindly | |
712 | */ | |
706546d0 MT |
713 | if (per_cpu(processor_device_array, pr->id) != NULL && |
714 | per_cpu(processor_device_array, pr->id) != device) { | |
4fdb2a05 | 715 | printk(KERN_WARNING "BIOS reported wrong ACPI id " |
0eacee58 | 716 | "for the processor\n"); |
d550d98d | 717 | return -ENODEV; |
cd8e2b48 | 718 | } |
706546d0 | 719 | per_cpu(processor_device_array, pr->id) = device; |
cd8e2b48 | 720 | |
706546d0 | 721 | per_cpu(processors, pr->id) = pr; |
1da177e4 LT |
722 | |
723 | result = acpi_processor_add_fs(device); | |
724 | if (result) | |
725 | goto end; | |
726 | ||
9f1eb99c ZR |
727 | sysdev = get_cpu_sysdev(pr->id); |
728 | if (sysfs_create_link(&device->dev.kobj, &sysdev->kobj, "sysdev")) | |
729 | return -EFAULT; | |
730 | ||
05131ecc VP |
731 | /* _PDC call should be done before doing anything else (if reqd.). */ |
732 | arch_acpi_processor_init_pdc(pr); | |
733 | acpi_processor_set_pdc(pr); | |
0ac3c571 ZY |
734 | #ifdef CONFIG_CPU_FREQ |
735 | acpi_processor_ppc_has_changed(pr); | |
736 | #endif | |
737 | acpi_processor_get_throttling_info(pr); | |
738 | acpi_processor_get_limit_info(pr); | |
739 | ||
05131ecc | 740 | |
1da177e4 LT |
741 | acpi_processor_power_init(pr, device); |
742 | ||
d9460fd2 ZR |
743 | pr->cdev = thermal_cooling_device_register("Processor", device, |
744 | &processor_cooling_ops); | |
d76628c6 TS |
745 | if (IS_ERR(pr->cdev)) { |
746 | result = PTR_ERR(pr->cdev); | |
747 | goto end; | |
748 | } | |
9030062f | 749 | |
fc3a8828 GKH |
750 | dev_info(&device->dev, "registered as cooling_device%d\n", |
751 | pr->cdev->id); | |
9030062f JL |
752 | |
753 | result = sysfs_create_link(&device->dev.kobj, | |
754 | &pr->cdev->device.kobj, | |
755 | "thermal_cooling"); | |
756 | if (result) | |
757 | printk(KERN_ERR PREFIX "Create sysfs link\n"); | |
758 | result = sysfs_create_link(&pr->cdev->device.kobj, | |
759 | &device->dev.kobj, | |
760 | "device"); | |
761 | if (result) | |
762 | printk(KERN_ERR PREFIX "Create sysfs link\n"); | |
d9460fd2 | 763 | |
1da177e4 LT |
764 | if (pr->flags.throttling) { |
765 | printk(KERN_INFO PREFIX "%s [%s] (supports", | |
4be44fcd | 766 | acpi_device_name(device), acpi_device_bid(device)); |
1da177e4 LT |
767 | printk(" %d throttling states", pr->throttling.state_count); |
768 | printk(")\n"); | |
769 | } | |
770 | ||
4be44fcd | 771 | end: |
1da177e4 | 772 | |
d550d98d | 773 | return result; |
1da177e4 LT |
774 | } |
775 | ||
7ec0a729 | 776 | static void acpi_processor_notify(struct acpi_device *device, u32 event) |
1da177e4 | 777 | { |
7ec0a729 | 778 | struct acpi_processor *pr = acpi_driver_data(device); |
e790cc8b | 779 | int saved; |
1da177e4 LT |
780 | |
781 | if (!pr) | |
d550d98d | 782 | return; |
1da177e4 | 783 | |
1da177e4 LT |
784 | switch (event) { |
785 | case ACPI_PROCESSOR_NOTIFY_PERFORMANCE: | |
e790cc8b | 786 | saved = pr->performance_platform_limit; |
1da177e4 | 787 | acpi_processor_ppc_has_changed(pr); |
e790cc8b AS |
788 | if (saved == pr->performance_platform_limit) |
789 | break; | |
14e04fb3 | 790 | acpi_bus_generate_proc_event(device, event, |
4be44fcd | 791 | pr->performance_platform_limit); |
962ce8ca | 792 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
0794469d | 793 | dev_name(&device->dev), event, |
962ce8ca | 794 | pr->performance_platform_limit); |
1da177e4 LT |
795 | break; |
796 | case ACPI_PROCESSOR_NOTIFY_POWER: | |
797 | acpi_processor_cst_has_changed(pr); | |
14e04fb3 | 798 | acpi_bus_generate_proc_event(device, event, 0); |
962ce8ca | 799 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
0794469d | 800 | dev_name(&device->dev), event, 0); |
1da177e4 | 801 | break; |
01854e69 LY |
802 | case ACPI_PROCESSOR_NOTIFY_THROTTLING: |
803 | acpi_processor_tstate_has_changed(pr); | |
14e04fb3 | 804 | acpi_bus_generate_proc_event(device, event, 0); |
962ce8ca | 805 | acpi_bus_generate_netlink_event(device->pnp.device_class, |
0794469d | 806 | dev_name(&device->dev), event, 0); |
1da177e4 LT |
807 | default: |
808 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 809 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
810 | break; |
811 | } | |
812 | ||
d550d98d | 813 | return; |
1da177e4 LT |
814 | } |
815 | ||
729c6ba3 VP |
816 | static int acpi_cpu_soft_notify(struct notifier_block *nfb, |
817 | unsigned long action, void *hcpu) | |
818 | { | |
819 | unsigned int cpu = (unsigned long)hcpu; | |
706546d0 | 820 | struct acpi_processor *pr = per_cpu(processors, cpu); |
729c6ba3 VP |
821 | |
822 | if (action == CPU_ONLINE && pr) { | |
823 | acpi_processor_ppc_has_changed(pr); | |
824 | acpi_processor_cst_has_changed(pr); | |
825 | acpi_processor_tstate_has_changed(pr); | |
826 | } | |
827 | return NOTIFY_OK; | |
828 | } | |
829 | ||
830 | static struct notifier_block acpi_cpu_notifier = | |
831 | { | |
832 | .notifier_call = acpi_cpu_soft_notify, | |
833 | }; | |
834 | ||
4be44fcd | 835 | static int acpi_processor_add(struct acpi_device *device) |
1da177e4 | 836 | { |
4be44fcd | 837 | struct acpi_processor *pr = NULL; |
1da177e4 | 838 | |
1da177e4 LT |
839 | |
840 | if (!device) | |
d550d98d | 841 | return -EINVAL; |
1da177e4 | 842 | |
36bcbec7 | 843 | pr = kzalloc(sizeof(struct acpi_processor), GFP_KERNEL); |
1da177e4 | 844 | if (!pr) |
d550d98d | 845 | return -ENOMEM; |
1da177e4 | 846 | |
2fdf66b4 RR |
847 | if (!alloc_cpumask_var(&pr->throttling.shared_cpu_map, GFP_KERNEL)) { |
848 | kfree(pr); | |
849 | return -ENOMEM; | |
850 | } | |
851 | ||
1da177e4 LT |
852 | pr->handle = device->handle; |
853 | strcpy(acpi_device_name(device), ACPI_PROCESSOR_DEVICE_NAME); | |
854 | strcpy(acpi_device_class(device), ACPI_PROCESSOR_CLASS); | |
db89b4f0 | 855 | device->driver_data = pr; |
1da177e4 | 856 | |
d550d98d | 857 | return 0; |
1da177e4 LT |
858 | } |
859 | ||
4be44fcd | 860 | static int acpi_processor_remove(struct acpi_device *device, int type) |
1da177e4 | 861 | { |
4be44fcd | 862 | struct acpi_processor *pr = NULL; |
1da177e4 | 863 | |
1da177e4 LT |
864 | |
865 | if (!device || !acpi_driver_data(device)) | |
d550d98d | 866 | return -EINVAL; |
1da177e4 | 867 | |
50dd0969 | 868 | pr = acpi_driver_data(device); |
1da177e4 | 869 | |
2fdf66b4 RR |
870 | if (pr->id >= nr_cpu_ids) |
871 | goto free; | |
1da177e4 LT |
872 | |
873 | if (type == ACPI_BUS_REMOVAL_EJECT) { | |
874 | if (acpi_processor_handle_eject(pr)) | |
d550d98d | 875 | return -EINVAL; |
1da177e4 LT |
876 | } |
877 | ||
878 | acpi_processor_power_exit(pr, device); | |
879 | ||
9f1eb99c ZR |
880 | sysfs_remove_link(&device->dev.kobj, "sysdev"); |
881 | ||
1da177e4 LT |
882 | acpi_processor_remove_fs(device); |
883 | ||
f28bb45e ZY |
884 | if (pr->cdev) { |
885 | sysfs_remove_link(&device->dev.kobj, "thermal_cooling"); | |
886 | sysfs_remove_link(&pr->cdev->device.kobj, "device"); | |
887 | thermal_cooling_device_unregister(pr->cdev); | |
888 | pr->cdev = NULL; | |
889 | } | |
d9460fd2 | 890 | |
706546d0 MT |
891 | per_cpu(processors, pr->id) = NULL; |
892 | per_cpu(processor_device_array, pr->id) = NULL; | |
2fdf66b4 RR |
893 | |
894 | free: | |
895 | free_cpumask_var(pr->throttling.shared_cpu_map); | |
1da177e4 LT |
896 | kfree(pr); |
897 | ||
d550d98d | 898 | return 0; |
1da177e4 LT |
899 | } |
900 | ||
901 | #ifdef CONFIG_ACPI_HOTPLUG_CPU | |
902 | /**************************************************************************** | |
903 | * Acpi processor hotplug support * | |
904 | ****************************************************************************/ | |
905 | ||
4be44fcd | 906 | static int is_processor_present(acpi_handle handle) |
1da177e4 | 907 | { |
4be44fcd | 908 | acpi_status status; |
27663c58 | 909 | unsigned long long sta = 0; |
1da177e4 | 910 | |
1da177e4 LT |
911 | |
912 | status = acpi_evaluate_integer(handle, "_STA", NULL, &sta); | |
cfaf3747 ZR |
913 | |
914 | if (ACPI_SUCCESS(status) && (sta & ACPI_STA_DEVICE_PRESENT)) | |
915 | return 1; | |
916 | ||
d0ce46f5 ZR |
917 | /* |
918 | * _STA is mandatory for a processor that supports hot plug | |
919 | */ | |
920 | if (status == AE_NOT_FOUND) | |
921 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
922 | "Processor does not support hot plug\n")); | |
923 | else | |
924 | ACPI_EXCEPTION((AE_INFO, status, | |
925 | "Processor Device is not present")); | |
cfaf3747 | 926 | return 0; |
1da177e4 LT |
927 | } |
928 | ||
1da177e4 | 929 | static |
4be44fcd | 930 | int acpi_processor_device_add(acpi_handle handle, struct acpi_device **device) |
1da177e4 | 931 | { |
4be44fcd LB |
932 | acpi_handle phandle; |
933 | struct acpi_device *pdev; | |
934 | struct acpi_processor *pr; | |
1da177e4 | 935 | |
1da177e4 LT |
936 | |
937 | if (acpi_get_parent(handle, &phandle)) { | |
d550d98d | 938 | return -ENODEV; |
1da177e4 LT |
939 | } |
940 | ||
941 | if (acpi_bus_get_device(phandle, &pdev)) { | |
d550d98d | 942 | return -ENODEV; |
1da177e4 LT |
943 | } |
944 | ||
945 | if (acpi_bus_add(device, pdev, handle, ACPI_BUS_TYPE_PROCESSOR)) { | |
d550d98d | 946 | return -ENODEV; |
1da177e4 LT |
947 | } |
948 | ||
3fb02738 | 949 | acpi_bus_start(*device); |
1da177e4 LT |
950 | |
951 | pr = acpi_driver_data(*device); | |
952 | if (!pr) | |
d550d98d | 953 | return -ENODEV; |
1da177e4 | 954 | |
fbb43ab0 | 955 | if ((pr->id >= 0) && (pr->id < nr_cpu_ids)) { |
f883d9db | 956 | kobject_uevent(&(*device)->dev.kobj, KOBJ_ONLINE); |
1da177e4 | 957 | } |
d550d98d | 958 | return 0; |
1da177e4 LT |
959 | } |
960 | ||
b95e9e8d SR |
961 | static void __ref acpi_processor_hotplug_notify(acpi_handle handle, |
962 | u32 event, void *data) | |
1da177e4 | 963 | { |
4be44fcd LB |
964 | struct acpi_processor *pr; |
965 | struct acpi_device *device = NULL; | |
1da177e4 LT |
966 | int result; |
967 | ||
1da177e4 LT |
968 | |
969 | switch (event) { | |
970 | case ACPI_NOTIFY_BUS_CHECK: | |
971 | case ACPI_NOTIFY_DEVICE_CHECK: | |
d6f882e1 GC |
972 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
973 | "Processor driver received %s event\n", | |
4be44fcd | 974 | (event == ACPI_NOTIFY_BUS_CHECK) ? |
d6f882e1 | 975 | "ACPI_NOTIFY_BUS_CHECK" : "ACPI_NOTIFY_DEVICE_CHECK")); |
1da177e4 LT |
976 | |
977 | if (!is_processor_present(handle)) | |
978 | break; | |
979 | ||
980 | if (acpi_bus_get_device(handle, &device)) { | |
981 | result = acpi_processor_device_add(handle, &device); | |
982 | if (result) | |
6468463a LB |
983 | printk(KERN_ERR PREFIX |
984 | "Unable to add the device\n"); | |
1da177e4 LT |
985 | break; |
986 | } | |
987 | ||
988 | pr = acpi_driver_data(device); | |
989 | if (!pr) { | |
6468463a | 990 | printk(KERN_ERR PREFIX "Driver data is NULL\n"); |
1da177e4 LT |
991 | break; |
992 | } | |
993 | ||
fbb43ab0 | 994 | if (pr->id >= 0 && (pr->id < nr_cpu_ids)) { |
f883d9db | 995 | kobject_uevent(&device->dev.kobj, KOBJ_OFFLINE); |
1da177e4 LT |
996 | break; |
997 | } | |
998 | ||
999 | result = acpi_processor_start(device); | |
fbb43ab0 | 1000 | if ((!result) && ((pr->id >= 0) && (pr->id < nr_cpu_ids))) { |
f883d9db | 1001 | kobject_uevent(&device->dev.kobj, KOBJ_ONLINE); |
1da177e4 | 1002 | } else { |
6468463a LB |
1003 | printk(KERN_ERR PREFIX "Device [%s] failed to start\n", |
1004 | acpi_device_bid(device)); | |
1da177e4 | 1005 | } |
4be44fcd | 1006 | break; |
1da177e4 | 1007 | case ACPI_NOTIFY_EJECT_REQUEST: |
4be44fcd LB |
1008 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
1009 | "received ACPI_NOTIFY_EJECT_REQUEST\n")); | |
1da177e4 LT |
1010 | |
1011 | if (acpi_bus_get_device(handle, &device)) { | |
6468463a LB |
1012 | printk(KERN_ERR PREFIX |
1013 | "Device don't exist, dropping EJECT\n"); | |
1da177e4 LT |
1014 | break; |
1015 | } | |
1016 | pr = acpi_driver_data(device); | |
1017 | if (!pr) { | |
6468463a LB |
1018 | printk(KERN_ERR PREFIX |
1019 | "Driver data is NULL, dropping EJECT\n"); | |
d550d98d | 1020 | return; |
1da177e4 LT |
1021 | } |
1022 | ||
fbb43ab0 | 1023 | if ((pr->id < nr_cpu_ids) && (cpu_present(pr->id))) |
f883d9db | 1024 | kobject_uevent(&device->dev.kobj, KOBJ_OFFLINE); |
1da177e4 LT |
1025 | break; |
1026 | default: | |
1027 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 1028 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
1029 | break; |
1030 | } | |
1031 | ||
d550d98d | 1032 | return; |
1da177e4 LT |
1033 | } |
1034 | ||
1035 | static acpi_status | |
1036 | processor_walk_namespace_cb(acpi_handle handle, | |
4be44fcd | 1037 | u32 lvl, void *context, void **rv) |
1da177e4 | 1038 | { |
4be44fcd | 1039 | acpi_status status; |
1da177e4 | 1040 | int *action = context; |
4be44fcd | 1041 | acpi_object_type type = 0; |
1da177e4 LT |
1042 | |
1043 | status = acpi_get_type(handle, &type); | |
1044 | if (ACPI_FAILURE(status)) | |
4be44fcd | 1045 | return (AE_OK); |
1da177e4 LT |
1046 | |
1047 | if (type != ACPI_TYPE_PROCESSOR) | |
4be44fcd | 1048 | return (AE_OK); |
1da177e4 | 1049 | |
4be44fcd | 1050 | switch (*action) { |
1da177e4 LT |
1051 | case INSTALL_NOTIFY_HANDLER: |
1052 | acpi_install_notify_handler(handle, | |
4be44fcd LB |
1053 | ACPI_SYSTEM_NOTIFY, |
1054 | acpi_processor_hotplug_notify, | |
1055 | NULL); | |
1da177e4 LT |
1056 | break; |
1057 | case UNINSTALL_NOTIFY_HANDLER: | |
1058 | acpi_remove_notify_handler(handle, | |
4be44fcd LB |
1059 | ACPI_SYSTEM_NOTIFY, |
1060 | acpi_processor_hotplug_notify); | |
1da177e4 LT |
1061 | break; |
1062 | default: | |
1063 | break; | |
1064 | } | |
1065 | ||
4be44fcd | 1066 | return (AE_OK); |
1da177e4 LT |
1067 | } |
1068 | ||
4be44fcd | 1069 | static acpi_status acpi_processor_hotadd_init(acpi_handle handle, int *p_cpu) |
1da177e4 | 1070 | { |
1da177e4 LT |
1071 | |
1072 | if (!is_processor_present(handle)) { | |
d550d98d | 1073 | return AE_ERROR; |
1da177e4 LT |
1074 | } |
1075 | ||
1076 | if (acpi_map_lsapic(handle, p_cpu)) | |
d550d98d | 1077 | return AE_ERROR; |
1da177e4 LT |
1078 | |
1079 | if (arch_register_cpu(*p_cpu)) { | |
1080 | acpi_unmap_lsapic(*p_cpu); | |
d550d98d | 1081 | return AE_ERROR; |
1da177e4 LT |
1082 | } |
1083 | ||
d550d98d | 1084 | return AE_OK; |
1da177e4 LT |
1085 | } |
1086 | ||
4be44fcd | 1087 | static int acpi_processor_handle_eject(struct acpi_processor *pr) |
1da177e4 | 1088 | { |
b62b8ef9 ZR |
1089 | if (cpu_online(pr->id)) |
1090 | cpu_down(pr->id); | |
1091 | ||
1da177e4 LT |
1092 | arch_unregister_cpu(pr->id); |
1093 | acpi_unmap_lsapic(pr->id); | |
4be44fcd | 1094 | return (0); |
1da177e4 LT |
1095 | } |
1096 | #else | |
4be44fcd | 1097 | static acpi_status acpi_processor_hotadd_init(acpi_handle handle, int *p_cpu) |
1da177e4 LT |
1098 | { |
1099 | return AE_ERROR; | |
1100 | } | |
4be44fcd | 1101 | static int acpi_processor_handle_eject(struct acpi_processor *pr) |
1da177e4 | 1102 | { |
4be44fcd | 1103 | return (-EINVAL); |
1da177e4 LT |
1104 | } |
1105 | #endif | |
1106 | ||
1da177e4 LT |
1107 | static |
1108 | void acpi_processor_install_hotplug_notify(void) | |
1109 | { | |
1110 | #ifdef CONFIG_ACPI_HOTPLUG_CPU | |
1111 | int action = INSTALL_NOTIFY_HANDLER; | |
1112 | acpi_walk_namespace(ACPI_TYPE_PROCESSOR, | |
4be44fcd LB |
1113 | ACPI_ROOT_OBJECT, |
1114 | ACPI_UINT32_MAX, | |
1115 | processor_walk_namespace_cb, &action, NULL); | |
1da177e4 | 1116 | #endif |
729c6ba3 | 1117 | register_hotcpu_notifier(&acpi_cpu_notifier); |
1da177e4 LT |
1118 | } |
1119 | ||
1da177e4 LT |
1120 | static |
1121 | void acpi_processor_uninstall_hotplug_notify(void) | |
1122 | { | |
1123 | #ifdef CONFIG_ACPI_HOTPLUG_CPU | |
1124 | int action = UNINSTALL_NOTIFY_HANDLER; | |
1125 | acpi_walk_namespace(ACPI_TYPE_PROCESSOR, | |
4be44fcd LB |
1126 | ACPI_ROOT_OBJECT, |
1127 | ACPI_UINT32_MAX, | |
1128 | processor_walk_namespace_cb, &action, NULL); | |
1da177e4 | 1129 | #endif |
729c6ba3 | 1130 | unregister_hotcpu_notifier(&acpi_cpu_notifier); |
1da177e4 LT |
1131 | } |
1132 | ||
1133 | /* | |
1134 | * We keep the driver loaded even when ACPI is not running. | |
1135 | * This is needed for the powernow-k8 driver, that works even without | |
1136 | * ACPI, but needs symbols from this driver | |
1137 | */ | |
1138 | ||
4be44fcd | 1139 | static int __init acpi_processor_init(void) |
1da177e4 | 1140 | { |
4be44fcd | 1141 | int result = 0; |
1da177e4 | 1142 | |
1da177e4 LT |
1143 | memset(&errata, 0, sizeof(errata)); |
1144 | ||
f18c5a08 AS |
1145 | #ifdef CONFIG_SMP |
1146 | if (ACPI_FAILURE(acpi_get_table(ACPI_SIG_MADT, 0, | |
1147 | (struct acpi_table_header **)&madt))) | |
70c0846e | 1148 | madt = NULL; |
f18c5a08 AS |
1149 | #endif |
1150 | ||
1da177e4 LT |
1151 | acpi_processor_dir = proc_mkdir(ACPI_PROCESSOR_CLASS, acpi_root_dir); |
1152 | if (!acpi_processor_dir) | |
83822fc9 | 1153 | return -ENOMEM; |
1da177e4 | 1154 | |
2a2a6471 ZY |
1155 | /* |
1156 | * Check whether the system is DMI table. If yes, OSPM | |
1157 | * should not use mwait for CPU-states. | |
1158 | */ | |
1159 | dmi_check_system(processor_idle_dmi_table); | |
4f86d3a8 LB |
1160 | result = cpuidle_register_driver(&acpi_idle_driver); |
1161 | if (result < 0) | |
1162 | goto out_proc; | |
1163 | ||
1da177e4 | 1164 | result = acpi_bus_register_driver(&acpi_processor_driver); |
4f86d3a8 LB |
1165 | if (result < 0) |
1166 | goto out_cpuidle; | |
1da177e4 LT |
1167 | |
1168 | acpi_processor_install_hotplug_notify(); | |
1169 | ||
1170 | acpi_thermal_cpufreq_init(); | |
1171 | ||
1172 | acpi_processor_ppc_init(); | |
1173 | ||
1180509f ZY |
1174 | acpi_processor_throttling_init(); |
1175 | ||
d550d98d | 1176 | return 0; |
4f86d3a8 LB |
1177 | |
1178 | out_cpuidle: | |
1179 | cpuidle_unregister_driver(&acpi_idle_driver); | |
1180 | ||
1181 | out_proc: | |
1182 | remove_proc_entry(ACPI_PROCESSOR_CLASS, acpi_root_dir); | |
1183 | ||
1184 | return result; | |
1da177e4 LT |
1185 | } |
1186 | ||
4be44fcd | 1187 | static void __exit acpi_processor_exit(void) |
1da177e4 | 1188 | { |
1da177e4 LT |
1189 | acpi_processor_ppc_exit(); |
1190 | ||
1191 | acpi_thermal_cpufreq_exit(); | |
1192 | ||
1193 | acpi_processor_uninstall_hotplug_notify(); | |
1194 | ||
1195 | acpi_bus_unregister_driver(&acpi_processor_driver); | |
1196 | ||
4f86d3a8 LB |
1197 | cpuidle_unregister_driver(&acpi_idle_driver); |
1198 | ||
1da177e4 LT |
1199 | remove_proc_entry(ACPI_PROCESSOR_CLASS, acpi_root_dir); |
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"); |