Commit | Line | Data |
---|---|---|
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> | |
47 | ||
48 | #include <asm/io.h> | |
49 | #include <asm/system.h> | |
50 | #include <asm/cpu.h> | |
51 | #include <asm/delay.h> | |
52 | #include <asm/uaccess.h> | |
53 | #include <asm/processor.h> | |
54 | #include <asm/smp.h> | |
55 | #include <asm/acpi.h> | |
56 | ||
57 | #include <acpi/acpi_bus.h> | |
58 | #include <acpi/acpi_drivers.h> | |
59 | #include <acpi/processor.h> | |
60 | ||
1da177e4 LT |
61 | #define ACPI_PROCESSOR_COMPONENT 0x01000000 |
62 | #define ACPI_PROCESSOR_CLASS "processor" | |
63 | #define ACPI_PROCESSOR_DRIVER_NAME "ACPI Processor Driver" | |
64 | #define ACPI_PROCESSOR_DEVICE_NAME "Processor" | |
65 | #define ACPI_PROCESSOR_FILE_INFO "info" | |
66 | #define ACPI_PROCESSOR_FILE_THROTTLING "throttling" | |
67 | #define ACPI_PROCESSOR_FILE_LIMIT "limit" | |
68 | #define ACPI_PROCESSOR_NOTIFY_PERFORMANCE 0x80 | |
69 | #define ACPI_PROCESSOR_NOTIFY_POWER 0x81 | |
70 | ||
71 | #define ACPI_PROCESSOR_LIMIT_USER 0 | |
72 | #define ACPI_PROCESSOR_LIMIT_THERMAL 1 | |
73 | ||
74 | #define ACPI_STA_PRESENT 0x00000001 | |
75 | ||
76 | #define _COMPONENT ACPI_PROCESSOR_COMPONENT | |
4be44fcd | 77 | ACPI_MODULE_NAME("acpi_processor") |
1da177e4 | 78 | |
4be44fcd | 79 | MODULE_AUTHOR("Paul Diefenbaugh"); |
1da177e4 LT |
80 | MODULE_DESCRIPTION(ACPI_PROCESSOR_DRIVER_NAME); |
81 | MODULE_LICENSE("GPL"); | |
82 | ||
4be44fcd LB |
83 | static int acpi_processor_add(struct acpi_device *device); |
84 | static int acpi_processor_start(struct acpi_device *device); | |
85 | static int acpi_processor_remove(struct acpi_device *device, int type); | |
1da177e4 | 86 | static int acpi_processor_info_open_fs(struct inode *inode, struct file *file); |
4be44fcd | 87 | static void acpi_processor_notify(acpi_handle handle, u32 event, void *data); |
1da177e4 LT |
88 | static acpi_status acpi_processor_hotadd_init(acpi_handle handle, int *p_cpu); |
89 | static int acpi_processor_handle_eject(struct acpi_processor *pr); | |
90 | ||
91 | static struct acpi_driver acpi_processor_driver = { | |
4be44fcd LB |
92 | .name = ACPI_PROCESSOR_DRIVER_NAME, |
93 | .class = ACPI_PROCESSOR_CLASS, | |
94 | .ids = ACPI_PROCESSOR_HID, | |
95 | .ops = { | |
96 | .add = acpi_processor_add, | |
97 | .remove = acpi_processor_remove, | |
98 | .start = acpi_processor_start, | |
99 | }, | |
1da177e4 LT |
100 | }; |
101 | ||
102 | #define INSTALL_NOTIFY_HANDLER 1 | |
103 | #define UNINSTALL_NOTIFY_HANDLER 2 | |
104 | ||
d7508032 | 105 | static const struct file_operations acpi_processor_info_fops = { |
4be44fcd LB |
106 | .open = acpi_processor_info_open_fs, |
107 | .read = seq_read, | |
108 | .llseek = seq_lseek, | |
109 | .release = single_release, | |
1da177e4 LT |
110 | }; |
111 | ||
4be44fcd | 112 | struct acpi_processor *processors[NR_CPUS]; |
9f222718 | 113 | struct acpi_processor_errata errata __read_mostly; |
1da177e4 | 114 | |
1da177e4 LT |
115 | /* -------------------------------------------------------------------------- |
116 | Errata Handling | |
117 | -------------------------------------------------------------------------- */ | |
118 | ||
4be44fcd | 119 | static int acpi_processor_errata_piix4(struct pci_dev *dev) |
1da177e4 | 120 | { |
4be44fcd LB |
121 | u8 rev = 0; |
122 | u8 value1 = 0; | |
123 | u8 value2 = 0; | |
1da177e4 | 124 | |
1da177e4 LT |
125 | |
126 | if (!dev) | |
d550d98d | 127 | return -EINVAL; |
1da177e4 LT |
128 | |
129 | /* | |
130 | * Note that 'dev' references the PIIX4 ACPI Controller. | |
131 | */ | |
132 | ||
133 | pci_read_config_byte(dev, PCI_REVISION_ID, &rev); | |
134 | ||
135 | switch (rev) { | |
136 | case 0: | |
137 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found PIIX4 A-step\n")); | |
138 | break; | |
139 | case 1: | |
140 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found PIIX4 B-step\n")); | |
141 | break; | |
142 | case 2: | |
143 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found PIIX4E\n")); | |
144 | break; | |
145 | case 3: | |
146 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found PIIX4M\n")); | |
147 | break; | |
148 | default: | |
149 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found unknown PIIX4\n")); | |
150 | break; | |
151 | } | |
152 | ||
153 | switch (rev) { | |
154 | ||
155 | case 0: /* PIIX4 A-step */ | |
156 | case 1: /* PIIX4 B-step */ | |
157 | /* | |
158 | * See specification changes #13 ("Manual Throttle Duty Cycle") | |
159 | * and #14 ("Enabling and Disabling Manual Throttle"), plus | |
160 | * erratum #5 ("STPCLK# Deassertion Time") from the January | |
161 | * 2002 PIIX4 specification update. Applies to only older | |
162 | * PIIX4 models. | |
163 | */ | |
164 | errata.piix4.throttle = 1; | |
165 | ||
166 | case 2: /* PIIX4E */ | |
167 | case 3: /* PIIX4M */ | |
168 | /* | |
169 | * See erratum #18 ("C3 Power State/BMIDE and Type-F DMA | |
170 | * Livelock") from the January 2002 PIIX4 specification update. | |
171 | * Applies to all PIIX4 models. | |
172 | */ | |
173 | ||
174 | /* | |
175 | * BM-IDE | |
176 | * ------ | |
177 | * Find the PIIX4 IDE Controller and get the Bus Master IDE | |
178 | * Status register address. We'll use this later to read | |
179 | * each IDE controller's DMA status to make sure we catch all | |
180 | * DMA activity. | |
181 | */ | |
182 | dev = pci_get_subsys(PCI_VENDOR_ID_INTEL, | |
4be44fcd LB |
183 | PCI_DEVICE_ID_INTEL_82371AB, |
184 | PCI_ANY_ID, PCI_ANY_ID, NULL); | |
1da177e4 LT |
185 | if (dev) { |
186 | errata.piix4.bmisx = pci_resource_start(dev, 4); | |
187 | pci_dev_put(dev); | |
188 | } | |
189 | ||
190 | /* | |
191 | * Type-F DMA | |
192 | * ---------- | |
193 | * Find the PIIX4 ISA Controller and read the Motherboard | |
194 | * DMA controller's status to see if Type-F (Fast) DMA mode | |
195 | * is enabled (bit 7) on either channel. Note that we'll | |
196 | * disable C3 support if this is enabled, as some legacy | |
197 | * devices won't operate well if fast DMA is disabled. | |
198 | */ | |
199 | dev = pci_get_subsys(PCI_VENDOR_ID_INTEL, | |
4be44fcd LB |
200 | PCI_DEVICE_ID_INTEL_82371AB_0, |
201 | PCI_ANY_ID, PCI_ANY_ID, NULL); | |
1da177e4 LT |
202 | if (dev) { |
203 | pci_read_config_byte(dev, 0x76, &value1); | |
204 | pci_read_config_byte(dev, 0x77, &value2); | |
205 | if ((value1 & 0x80) || (value2 & 0x80)) | |
206 | errata.piix4.fdma = 1; | |
207 | pci_dev_put(dev); | |
208 | } | |
209 | ||
210 | break; | |
211 | } | |
212 | ||
213 | if (errata.piix4.bmisx) | |
214 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 215 | "Bus master activity detection (BM-IDE) erratum enabled\n")); |
1da177e4 LT |
216 | if (errata.piix4.fdma) |
217 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 218 | "Type-F DMA livelock erratum (C3 disabled)\n")); |
1da177e4 | 219 | |
d550d98d | 220 | return 0; |
1da177e4 LT |
221 | } |
222 | ||
8713cbef | 223 | static int acpi_processor_errata(struct acpi_processor *pr) |
1da177e4 | 224 | { |
4be44fcd LB |
225 | int result = 0; |
226 | struct pci_dev *dev = NULL; | |
1da177e4 | 227 | |
1da177e4 LT |
228 | |
229 | if (!pr) | |
d550d98d | 230 | return -EINVAL; |
1da177e4 LT |
231 | |
232 | /* | |
233 | * PIIX4 | |
234 | */ | |
235 | dev = pci_get_subsys(PCI_VENDOR_ID_INTEL, | |
4be44fcd LB |
236 | PCI_DEVICE_ID_INTEL_82371AB_3, PCI_ANY_ID, |
237 | PCI_ANY_ID, NULL); | |
1da177e4 LT |
238 | if (dev) { |
239 | result = acpi_processor_errata_piix4(dev); | |
240 | pci_dev_put(dev); | |
241 | } | |
242 | ||
d550d98d | 243 | return result; |
1da177e4 LT |
244 | } |
245 | ||
02df8b93 | 246 | /* -------------------------------------------------------------------------- |
0b28002f | 247 | Common ACPI processor functions |
02df8b93 VP |
248 | -------------------------------------------------------------------------- */ |
249 | ||
250 | /* | |
251 | * _PDC is required for a BIOS-OS handshake for most of the newer | |
252 | * ACPI processor features. | |
253 | */ | |
05131ecc | 254 | static int acpi_processor_set_pdc(struct acpi_processor *pr) |
02df8b93 | 255 | { |
05131ecc | 256 | struct acpi_object_list *pdc_in = pr->pdc; |
4be44fcd | 257 | acpi_status status = AE_OK; |
02df8b93 | 258 | |
02df8b93 | 259 | |
05131ecc | 260 | if (!pdc_in) |
d550d98d | 261 | return status; |
02df8b93 | 262 | |
05131ecc | 263 | status = acpi_evaluate_object(pr->handle, "_PDC", pdc_in, NULL); |
02df8b93 | 264 | |
05131ecc | 265 | if (ACPI_FAILURE(status)) |
4be44fcd | 266 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
05131ecc | 267 | "Could not evaluate _PDC, using legacy perf. control...\n")); |
02df8b93 | 268 | |
d550d98d | 269 | return status; |
02df8b93 VP |
270 | } |
271 | ||
1da177e4 LT |
272 | /* -------------------------------------------------------------------------- |
273 | FS Interface (/proc) | |
274 | -------------------------------------------------------------------------- */ | |
275 | ||
4be44fcd | 276 | static struct proc_dir_entry *acpi_processor_dir = NULL; |
1da177e4 LT |
277 | |
278 | static int acpi_processor_info_seq_show(struct seq_file *seq, void *offset) | |
279 | { | |
50dd0969 | 280 | struct acpi_processor *pr = seq->private; |
1da177e4 | 281 | |
1da177e4 LT |
282 | |
283 | if (!pr) | |
284 | goto end; | |
285 | ||
286 | seq_printf(seq, "processor id: %d\n" | |
4be44fcd LB |
287 | "acpi id: %d\n" |
288 | "bus mastering control: %s\n" | |
289 | "power management: %s\n" | |
290 | "throttling control: %s\n" | |
291 | "limit interface: %s\n", | |
292 | pr->id, | |
293 | pr->acpi_id, | |
294 | pr->flags.bm_control ? "yes" : "no", | |
295 | pr->flags.power ? "yes" : "no", | |
296 | pr->flags.throttling ? "yes" : "no", | |
297 | pr->flags.limit ? "yes" : "no"); | |
298 | ||
299 | end: | |
d550d98d | 300 | return 0; |
1da177e4 LT |
301 | } |
302 | ||
303 | static int acpi_processor_info_open_fs(struct inode *inode, struct file *file) | |
304 | { | |
305 | return single_open(file, acpi_processor_info_seq_show, | |
4be44fcd | 306 | PDE(inode)->data); |
1da177e4 LT |
307 | } |
308 | ||
4be44fcd | 309 | static int acpi_processor_add_fs(struct acpi_device *device) |
1da177e4 | 310 | { |
4be44fcd | 311 | struct proc_dir_entry *entry = NULL; |
1da177e4 | 312 | |
1da177e4 LT |
313 | |
314 | if (!acpi_device_dir(device)) { | |
315 | acpi_device_dir(device) = proc_mkdir(acpi_device_bid(device), | |
4be44fcd | 316 | acpi_processor_dir); |
1da177e4 | 317 | if (!acpi_device_dir(device)) |
d550d98d | 318 | return -ENODEV; |
1da177e4 LT |
319 | } |
320 | acpi_device_dir(device)->owner = THIS_MODULE; | |
321 | ||
322 | /* 'info' [R] */ | |
323 | entry = create_proc_entry(ACPI_PROCESSOR_FILE_INFO, | |
4be44fcd | 324 | S_IRUGO, acpi_device_dir(device)); |
1da177e4 | 325 | if (!entry) |
d550d98d | 326 | return -EIO; |
1da177e4 LT |
327 | else { |
328 | entry->proc_fops = &acpi_processor_info_fops; | |
329 | entry->data = acpi_driver_data(device); | |
330 | entry->owner = THIS_MODULE; | |
331 | } | |
332 | ||
333 | /* 'throttling' [R/W] */ | |
334 | entry = create_proc_entry(ACPI_PROCESSOR_FILE_THROTTLING, | |
4be44fcd LB |
335 | S_IFREG | S_IRUGO | S_IWUSR, |
336 | acpi_device_dir(device)); | |
1da177e4 | 337 | if (!entry) |
d550d98d | 338 | return -EIO; |
1da177e4 LT |
339 | else { |
340 | entry->proc_fops = &acpi_processor_throttling_fops; | |
1da177e4 LT |
341 | entry->data = acpi_driver_data(device); |
342 | entry->owner = THIS_MODULE; | |
343 | } | |
344 | ||
345 | /* 'limit' [R/W] */ | |
346 | entry = create_proc_entry(ACPI_PROCESSOR_FILE_LIMIT, | |
4be44fcd LB |
347 | S_IFREG | S_IRUGO | S_IWUSR, |
348 | acpi_device_dir(device)); | |
1da177e4 | 349 | if (!entry) |
d550d98d | 350 | return -EIO; |
1da177e4 LT |
351 | else { |
352 | entry->proc_fops = &acpi_processor_limit_fops; | |
1da177e4 LT |
353 | entry->data = acpi_driver_data(device); |
354 | entry->owner = THIS_MODULE; | |
355 | } | |
356 | ||
d550d98d | 357 | return 0; |
1da177e4 LT |
358 | } |
359 | ||
4be44fcd | 360 | static int acpi_processor_remove_fs(struct acpi_device *device) |
1da177e4 | 361 | { |
1da177e4 LT |
362 | |
363 | if (acpi_device_dir(device)) { | |
4be44fcd LB |
364 | remove_proc_entry(ACPI_PROCESSOR_FILE_INFO, |
365 | acpi_device_dir(device)); | |
1da177e4 | 366 | remove_proc_entry(ACPI_PROCESSOR_FILE_THROTTLING, |
4be44fcd LB |
367 | acpi_device_dir(device)); |
368 | remove_proc_entry(ACPI_PROCESSOR_FILE_LIMIT, | |
369 | acpi_device_dir(device)); | |
1da177e4 LT |
370 | remove_proc_entry(acpi_device_bid(device), acpi_processor_dir); |
371 | acpi_device_dir(device) = NULL; | |
372 | } | |
373 | ||
d550d98d | 374 | return 0; |
1da177e4 LT |
375 | } |
376 | ||
377 | /* Use the acpiid in MADT to map cpus in case of SMP */ | |
378 | #ifndef CONFIG_SMP | |
df42baa0 | 379 | #define convert_acpiid_to_cpu(acpi_id) (-1) |
1da177e4 LT |
380 | #else |
381 | ||
382 | #ifdef CONFIG_IA64 | |
383 | #define arch_acpiid_to_apicid ia64_acpiid_to_sapicid | |
384 | #define arch_cpu_to_apicid ia64_cpu_to_sapicid | |
385 | #define ARCH_BAD_APICID (0xffff) | |
386 | #else | |
387 | #define arch_acpiid_to_apicid x86_acpiid_to_apicid | |
388 | #define arch_cpu_to_apicid x86_cpu_to_apicid | |
389 | #define ARCH_BAD_APICID (0xff) | |
390 | #endif | |
391 | ||
df42baa0 | 392 | static int convert_acpiid_to_cpu(u8 acpi_id) |
1da177e4 LT |
393 | { |
394 | u16 apic_id; | |
4a35a46b | 395 | int i; |
1da177e4 LT |
396 | |
397 | apic_id = arch_acpiid_to_apicid[acpi_id]; | |
398 | if (apic_id == ARCH_BAD_APICID) | |
399 | return -1; | |
400 | ||
401 | for (i = 0; i < NR_CPUS; i++) { | |
4a35a46b LB |
402 | if (arch_cpu_to_apicid[i] == apic_id) |
403 | return i; | |
1da177e4 LT |
404 | } |
405 | return -1; | |
406 | } | |
407 | #endif | |
408 | ||
409 | /* -------------------------------------------------------------------------- | |
410 | Driver Interface | |
411 | -------------------------------------------------------------------------- */ | |
412 | ||
4be44fcd | 413 | static int acpi_processor_get_info(struct acpi_processor *pr) |
1da177e4 | 414 | { |
4be44fcd LB |
415 | acpi_status status = 0; |
416 | union acpi_object object = { 0 }; | |
417 | struct acpi_buffer buffer = { sizeof(union acpi_object), &object }; | |
df42baa0 | 418 | int cpu_index; |
4be44fcd | 419 | static int cpu0_initialized; |
1da177e4 | 420 | |
1da177e4 LT |
421 | |
422 | if (!pr) | |
d550d98d | 423 | return -EINVAL; |
1da177e4 LT |
424 | |
425 | if (num_online_cpus() > 1) | |
426 | errata.smp = TRUE; | |
427 | ||
428 | acpi_processor_errata(pr); | |
429 | ||
430 | /* | |
431 | * Check to see if we have bus mastering arbitration control. This | |
432 | * is required for proper C3 usage (to maintain cache coherency). | |
433 | */ | |
ad71860a | 434 | if (acpi_fadt.pm2_control_block && acpi_fadt.pm2_control_length) { |
1da177e4 LT |
435 | pr->flags.bm_control = 1; |
436 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd LB |
437 | "Bus mastering arbitration control present\n")); |
438 | } else | |
1da177e4 | 439 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
4be44fcd | 440 | "No bus mastering arbitration control\n")); |
1da177e4 LT |
441 | |
442 | /* | |
443 | * Evalute the processor object. Note that it is common on SMP to | |
444 | * have the first (boot) processor with a valid PBLK address while | |
445 | * all others have a NULL address. | |
446 | */ | |
447 | status = acpi_evaluate_object(pr->handle, NULL, NULL, &buffer); | |
448 | if (ACPI_FAILURE(status)) { | |
6468463a | 449 | printk(KERN_ERR PREFIX "Evaluating processor object\n"); |
d550d98d | 450 | return -ENODEV; |
1da177e4 LT |
451 | } |
452 | ||
453 | /* | |
454 | * TBD: Synch processor ID (via LAPIC/LSAPIC structures) on SMP. | |
4be44fcd | 455 | * >>> 'acpi_get_processor_id(acpi_id, &id)' in arch/xxx/acpi.c |
1da177e4 LT |
456 | */ |
457 | pr->acpi_id = object.processor.proc_id; | |
458 | ||
4a35a46b | 459 | cpu_index = convert_acpiid_to_cpu(pr->acpi_id); |
1da177e4 | 460 | |
4be44fcd | 461 | /* Handle UP system running SMP kernel, with no LAPIC in MADT */ |
df42baa0 | 462 | if (!cpu0_initialized && (cpu_index == -1) && |
4be44fcd LB |
463 | (num_online_cpus() == 1)) { |
464 | cpu_index = 0; | |
465 | } | |
466 | ||
467 | cpu0_initialized = 1; | |
468 | ||
469 | pr->id = cpu_index; | |
470 | ||
471 | /* | |
472 | * Extra Processor objects may be enumerated on MP systems with | |
473 | * less than the max # of CPUs. They should be ignored _iff | |
474 | * they are physically not present. | |
475 | */ | |
df42baa0 | 476 | if (cpu_index == -1) { |
4be44fcd LB |
477 | if (ACPI_FAILURE |
478 | (acpi_processor_hotadd_init(pr->handle, &pr->id))) { | |
d550d98d | 479 | return -ENODEV; |
4be44fcd LB |
480 | } |
481 | } | |
1da177e4 LT |
482 | |
483 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Processor [%d:%d]\n", pr->id, | |
4be44fcd | 484 | pr->acpi_id)); |
1da177e4 LT |
485 | |
486 | if (!object.processor.pblk_address) | |
487 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No PBLK (NULL address)\n")); | |
488 | else if (object.processor.pblk_length != 6) | |
6468463a LB |
489 | printk(KERN_ERR PREFIX "Invalid PBLK length [%d]\n", |
490 | object.processor.pblk_length); | |
1da177e4 LT |
491 | else { |
492 | pr->throttling.address = object.processor.pblk_address; | |
493 | pr->throttling.duty_offset = acpi_fadt.duty_offset; | |
494 | pr->throttling.duty_width = acpi_fadt.duty_width; | |
495 | ||
496 | pr->pblk = object.processor.pblk_address; | |
497 | ||
498 | /* | |
499 | * We don't care about error returns - we just try to mark | |
500 | * these reserved so that nobody else is confused into thinking | |
501 | * that this region might be unused.. | |
502 | * | |
503 | * (In particular, allocating the IO range for Cardbus) | |
504 | */ | |
505 | request_region(pr->throttling.address, 6, "ACPI CPU throttle"); | |
506 | } | |
507 | ||
508 | #ifdef CONFIG_CPU_FREQ | |
509 | acpi_processor_ppc_has_changed(pr); | |
510 | #endif | |
511 | acpi_processor_get_throttling_info(pr); | |
512 | acpi_processor_get_limit_info(pr); | |
513 | ||
d550d98d | 514 | return 0; |
1da177e4 LT |
515 | } |
516 | ||
cd8e2b48 VP |
517 | static void *processor_device_array[NR_CPUS]; |
518 | ||
7af8b660 | 519 | static int __cpuinit acpi_processor_start(struct acpi_device *device) |
1da177e4 | 520 | { |
4be44fcd LB |
521 | int result = 0; |
522 | acpi_status status = AE_OK; | |
523 | struct acpi_processor *pr; | |
1da177e4 | 524 | |
1da177e4 LT |
525 | |
526 | pr = acpi_driver_data(device); | |
527 | ||
528 | result = acpi_processor_get_info(pr); | |
529 | if (result) { | |
530 | /* Processor is physically not present */ | |
d550d98d | 531 | return 0; |
1da177e4 LT |
532 | } |
533 | ||
534 | BUG_ON((pr->id >= NR_CPUS) || (pr->id < 0)); | |
535 | ||
cd8e2b48 VP |
536 | /* |
537 | * Buggy BIOS check | |
538 | * ACPI id of processors can be reported wrongly by the BIOS. | |
539 | * Don't trust it blindly | |
540 | */ | |
541 | if (processor_device_array[pr->id] != NULL && | |
50dd0969 | 542 | processor_device_array[pr->id] != device) { |
0eacee58 LB |
543 | printk(KERN_WARNING "BIOS reported wrong ACPI id" |
544 | "for the processor\n"); | |
d550d98d | 545 | return -ENODEV; |
cd8e2b48 | 546 | } |
50dd0969 | 547 | processor_device_array[pr->id] = device; |
cd8e2b48 | 548 | |
1da177e4 LT |
549 | processors[pr->id] = pr; |
550 | ||
551 | result = acpi_processor_add_fs(device); | |
552 | if (result) | |
553 | goto end; | |
554 | ||
555 | status = acpi_install_notify_handler(pr->handle, ACPI_DEVICE_NOTIFY, | |
4be44fcd | 556 | acpi_processor_notify, pr); |
1da177e4 | 557 | |
05131ecc VP |
558 | /* _PDC call should be done before doing anything else (if reqd.). */ |
559 | arch_acpi_processor_init_pdc(pr); | |
560 | acpi_processor_set_pdc(pr); | |
561 | ||
1da177e4 LT |
562 | acpi_processor_power_init(pr, device); |
563 | ||
564 | if (pr->flags.throttling) { | |
565 | printk(KERN_INFO PREFIX "%s [%s] (supports", | |
4be44fcd | 566 | acpi_device_name(device), acpi_device_bid(device)); |
1da177e4 LT |
567 | printk(" %d throttling states", pr->throttling.state_count); |
568 | printk(")\n"); | |
569 | } | |
570 | ||
4be44fcd | 571 | end: |
1da177e4 | 572 | |
d550d98d | 573 | return result; |
1da177e4 LT |
574 | } |
575 | ||
4be44fcd | 576 | static void acpi_processor_notify(acpi_handle handle, u32 event, void *data) |
1da177e4 | 577 | { |
50dd0969 | 578 | struct acpi_processor *pr = data; |
4be44fcd | 579 | struct acpi_device *device = NULL; |
1da177e4 | 580 | |
1da177e4 LT |
581 | |
582 | if (!pr) | |
d550d98d | 583 | return; |
1da177e4 LT |
584 | |
585 | if (acpi_bus_get_device(pr->handle, &device)) | |
d550d98d | 586 | return; |
1da177e4 LT |
587 | |
588 | switch (event) { | |
589 | case ACPI_PROCESSOR_NOTIFY_PERFORMANCE: | |
590 | acpi_processor_ppc_has_changed(pr); | |
591 | acpi_bus_generate_event(device, event, | |
4be44fcd | 592 | pr->performance_platform_limit); |
1da177e4 LT |
593 | break; |
594 | case ACPI_PROCESSOR_NOTIFY_POWER: | |
595 | acpi_processor_cst_has_changed(pr); | |
596 | acpi_bus_generate_event(device, event, 0); | |
597 | break; | |
598 | default: | |
599 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 600 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
601 | break; |
602 | } | |
603 | ||
d550d98d | 604 | return; |
1da177e4 LT |
605 | } |
606 | ||
4be44fcd | 607 | static int acpi_processor_add(struct acpi_device *device) |
1da177e4 | 608 | { |
4be44fcd | 609 | struct acpi_processor *pr = NULL; |
1da177e4 | 610 | |
1da177e4 LT |
611 | |
612 | if (!device) | |
d550d98d | 613 | return -EINVAL; |
1da177e4 | 614 | |
36bcbec7 | 615 | pr = kzalloc(sizeof(struct acpi_processor), GFP_KERNEL); |
1da177e4 | 616 | if (!pr) |
d550d98d | 617 | return -ENOMEM; |
1da177e4 LT |
618 | |
619 | pr->handle = device->handle; | |
620 | strcpy(acpi_device_name(device), ACPI_PROCESSOR_DEVICE_NAME); | |
621 | strcpy(acpi_device_class(device), ACPI_PROCESSOR_CLASS); | |
622 | acpi_driver_data(device) = pr; | |
623 | ||
d550d98d | 624 | return 0; |
1da177e4 LT |
625 | } |
626 | ||
4be44fcd | 627 | static int acpi_processor_remove(struct acpi_device *device, int type) |
1da177e4 | 628 | { |
4be44fcd LB |
629 | acpi_status status = AE_OK; |
630 | struct acpi_processor *pr = NULL; | |
1da177e4 | 631 | |
1da177e4 LT |
632 | |
633 | if (!device || !acpi_driver_data(device)) | |
d550d98d | 634 | return -EINVAL; |
1da177e4 | 635 | |
50dd0969 | 636 | pr = acpi_driver_data(device); |
1da177e4 LT |
637 | |
638 | if (pr->id >= NR_CPUS) { | |
639 | kfree(pr); | |
d550d98d | 640 | return 0; |
1da177e4 LT |
641 | } |
642 | ||
643 | if (type == ACPI_BUS_REMOVAL_EJECT) { | |
644 | if (acpi_processor_handle_eject(pr)) | |
d550d98d | 645 | return -EINVAL; |
1da177e4 LT |
646 | } |
647 | ||
648 | acpi_processor_power_exit(pr, device); | |
649 | ||
650 | status = acpi_remove_notify_handler(pr->handle, ACPI_DEVICE_NOTIFY, | |
4be44fcd | 651 | acpi_processor_notify); |
1da177e4 LT |
652 | |
653 | acpi_processor_remove_fs(device); | |
654 | ||
655 | processors[pr->id] = NULL; | |
656 | ||
657 | kfree(pr); | |
658 | ||
d550d98d | 659 | return 0; |
1da177e4 LT |
660 | } |
661 | ||
662 | #ifdef CONFIG_ACPI_HOTPLUG_CPU | |
663 | /**************************************************************************** | |
664 | * Acpi processor hotplug support * | |
665 | ****************************************************************************/ | |
666 | ||
667 | static int is_processor_present(acpi_handle handle); | |
668 | ||
4be44fcd | 669 | static int is_processor_present(acpi_handle handle) |
1da177e4 | 670 | { |
4be44fcd LB |
671 | acpi_status status; |
672 | unsigned long sta = 0; | |
1da177e4 | 673 | |
1da177e4 LT |
674 | |
675 | status = acpi_evaluate_integer(handle, "_STA", NULL, &sta); | |
676 | if (ACPI_FAILURE(status) || !(sta & ACPI_STA_PRESENT)) { | |
a6fc6720 | 677 | ACPI_EXCEPTION((AE_INFO, status, "Processor Device is not present")); |
d550d98d | 678 | return 0; |
1da177e4 | 679 | } |
d550d98d | 680 | return 1; |
1da177e4 LT |
681 | } |
682 | ||
1da177e4 | 683 | static |
4be44fcd | 684 | int acpi_processor_device_add(acpi_handle handle, struct acpi_device **device) |
1da177e4 | 685 | { |
4be44fcd LB |
686 | acpi_handle phandle; |
687 | struct acpi_device *pdev; | |
688 | struct acpi_processor *pr; | |
1da177e4 | 689 | |
1da177e4 LT |
690 | |
691 | if (acpi_get_parent(handle, &phandle)) { | |
d550d98d | 692 | return -ENODEV; |
1da177e4 LT |
693 | } |
694 | ||
695 | if (acpi_bus_get_device(phandle, &pdev)) { | |
d550d98d | 696 | return -ENODEV; |
1da177e4 LT |
697 | } |
698 | ||
699 | if (acpi_bus_add(device, pdev, handle, ACPI_BUS_TYPE_PROCESSOR)) { | |
d550d98d | 700 | return -ENODEV; |
1da177e4 LT |
701 | } |
702 | ||
3fb02738 | 703 | acpi_bus_start(*device); |
1da177e4 LT |
704 | |
705 | pr = acpi_driver_data(*device); | |
706 | if (!pr) | |
d550d98d | 707 | return -ENODEV; |
1da177e4 | 708 | |
4be44fcd | 709 | if ((pr->id >= 0) && (pr->id < NR_CPUS)) { |
312c004d | 710 | kobject_uevent(&(*device)->kobj, KOBJ_ONLINE); |
1da177e4 | 711 | } |
d550d98d | 712 | return 0; |
1da177e4 LT |
713 | } |
714 | ||
1da177e4 | 715 | static void |
4be44fcd | 716 | acpi_processor_hotplug_notify(acpi_handle handle, u32 event, void *data) |
1da177e4 | 717 | { |
4be44fcd LB |
718 | struct acpi_processor *pr; |
719 | struct acpi_device *device = NULL; | |
1da177e4 LT |
720 | int result; |
721 | ||
1da177e4 LT |
722 | |
723 | switch (event) { | |
724 | case ACPI_NOTIFY_BUS_CHECK: | |
725 | case ACPI_NOTIFY_DEVICE_CHECK: | |
726 | printk("Processor driver received %s event\n", | |
4be44fcd LB |
727 | (event == ACPI_NOTIFY_BUS_CHECK) ? |
728 | "ACPI_NOTIFY_BUS_CHECK" : "ACPI_NOTIFY_DEVICE_CHECK"); | |
1da177e4 LT |
729 | |
730 | if (!is_processor_present(handle)) | |
731 | break; | |
732 | ||
733 | if (acpi_bus_get_device(handle, &device)) { | |
734 | result = acpi_processor_device_add(handle, &device); | |
735 | if (result) | |
6468463a LB |
736 | printk(KERN_ERR PREFIX |
737 | "Unable to add the device\n"); | |
1da177e4 LT |
738 | break; |
739 | } | |
740 | ||
741 | pr = acpi_driver_data(device); | |
742 | if (!pr) { | |
6468463a | 743 | printk(KERN_ERR PREFIX "Driver data is NULL\n"); |
1da177e4 LT |
744 | break; |
745 | } | |
746 | ||
747 | if (pr->id >= 0 && (pr->id < NR_CPUS)) { | |
312c004d | 748 | kobject_uevent(&device->kobj, KOBJ_OFFLINE); |
1da177e4 LT |
749 | break; |
750 | } | |
751 | ||
752 | result = acpi_processor_start(device); | |
4be44fcd | 753 | if ((!result) && ((pr->id >= 0) && (pr->id < NR_CPUS))) { |
312c004d | 754 | kobject_uevent(&device->kobj, KOBJ_ONLINE); |
1da177e4 | 755 | } else { |
6468463a LB |
756 | printk(KERN_ERR PREFIX "Device [%s] failed to start\n", |
757 | acpi_device_bid(device)); | |
1da177e4 | 758 | } |
4be44fcd | 759 | break; |
1da177e4 | 760 | case ACPI_NOTIFY_EJECT_REQUEST: |
4be44fcd LB |
761 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
762 | "received ACPI_NOTIFY_EJECT_REQUEST\n")); | |
1da177e4 LT |
763 | |
764 | if (acpi_bus_get_device(handle, &device)) { | |
6468463a LB |
765 | printk(KERN_ERR PREFIX |
766 | "Device don't exist, dropping EJECT\n"); | |
1da177e4 LT |
767 | break; |
768 | } | |
769 | pr = acpi_driver_data(device); | |
770 | if (!pr) { | |
6468463a LB |
771 | printk(KERN_ERR PREFIX |
772 | "Driver data is NULL, dropping EJECT\n"); | |
d550d98d | 773 | return; |
1da177e4 LT |
774 | } |
775 | ||
776 | if ((pr->id < NR_CPUS) && (cpu_present(pr->id))) | |
312c004d | 777 | kobject_uevent(&device->kobj, KOBJ_OFFLINE); |
1da177e4 LT |
778 | break; |
779 | default: | |
780 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, | |
4be44fcd | 781 | "Unsupported event [0x%x]\n", event)); |
1da177e4 LT |
782 | break; |
783 | } | |
784 | ||
d550d98d | 785 | return; |
1da177e4 LT |
786 | } |
787 | ||
788 | static acpi_status | |
789 | processor_walk_namespace_cb(acpi_handle handle, | |
4be44fcd | 790 | u32 lvl, void *context, void **rv) |
1da177e4 | 791 | { |
4be44fcd | 792 | acpi_status status; |
1da177e4 | 793 | int *action = context; |
4be44fcd | 794 | acpi_object_type type = 0; |
1da177e4 LT |
795 | |
796 | status = acpi_get_type(handle, &type); | |
797 | if (ACPI_FAILURE(status)) | |
4be44fcd | 798 | return (AE_OK); |
1da177e4 LT |
799 | |
800 | if (type != ACPI_TYPE_PROCESSOR) | |
4be44fcd | 801 | return (AE_OK); |
1da177e4 | 802 | |
4be44fcd | 803 | switch (*action) { |
1da177e4 LT |
804 | case INSTALL_NOTIFY_HANDLER: |
805 | acpi_install_notify_handler(handle, | |
4be44fcd LB |
806 | ACPI_SYSTEM_NOTIFY, |
807 | acpi_processor_hotplug_notify, | |
808 | NULL); | |
1da177e4 LT |
809 | break; |
810 | case UNINSTALL_NOTIFY_HANDLER: | |
811 | acpi_remove_notify_handler(handle, | |
4be44fcd LB |
812 | ACPI_SYSTEM_NOTIFY, |
813 | acpi_processor_hotplug_notify); | |
1da177e4 LT |
814 | break; |
815 | default: | |
816 | break; | |
817 | } | |
818 | ||
4be44fcd | 819 | return (AE_OK); |
1da177e4 LT |
820 | } |
821 | ||
4be44fcd | 822 | static acpi_status acpi_processor_hotadd_init(acpi_handle handle, int *p_cpu) |
1da177e4 | 823 | { |
1da177e4 LT |
824 | |
825 | if (!is_processor_present(handle)) { | |
d550d98d | 826 | return AE_ERROR; |
1da177e4 LT |
827 | } |
828 | ||
829 | if (acpi_map_lsapic(handle, p_cpu)) | |
d550d98d | 830 | return AE_ERROR; |
1da177e4 LT |
831 | |
832 | if (arch_register_cpu(*p_cpu)) { | |
833 | acpi_unmap_lsapic(*p_cpu); | |
d550d98d | 834 | return AE_ERROR; |
1da177e4 LT |
835 | } |
836 | ||
d550d98d | 837 | return AE_OK; |
1da177e4 LT |
838 | } |
839 | ||
4be44fcd | 840 | static int acpi_processor_handle_eject(struct acpi_processor *pr) |
1da177e4 LT |
841 | { |
842 | if (cpu_online(pr->id)) { | |
4be44fcd | 843 | return (-EINVAL); |
1da177e4 LT |
844 | } |
845 | arch_unregister_cpu(pr->id); | |
846 | acpi_unmap_lsapic(pr->id); | |
4be44fcd | 847 | return (0); |
1da177e4 LT |
848 | } |
849 | #else | |
4be44fcd | 850 | static acpi_status acpi_processor_hotadd_init(acpi_handle handle, int *p_cpu) |
1da177e4 LT |
851 | { |
852 | return AE_ERROR; | |
853 | } | |
4be44fcd | 854 | static int acpi_processor_handle_eject(struct acpi_processor *pr) |
1da177e4 | 855 | { |
4be44fcd | 856 | return (-EINVAL); |
1da177e4 LT |
857 | } |
858 | #endif | |
859 | ||
1da177e4 LT |
860 | static |
861 | void acpi_processor_install_hotplug_notify(void) | |
862 | { | |
863 | #ifdef CONFIG_ACPI_HOTPLUG_CPU | |
864 | int action = INSTALL_NOTIFY_HANDLER; | |
865 | acpi_walk_namespace(ACPI_TYPE_PROCESSOR, | |
4be44fcd LB |
866 | ACPI_ROOT_OBJECT, |
867 | ACPI_UINT32_MAX, | |
868 | processor_walk_namespace_cb, &action, NULL); | |
1da177e4 LT |
869 | #endif |
870 | } | |
871 | ||
1da177e4 LT |
872 | static |
873 | void acpi_processor_uninstall_hotplug_notify(void) | |
874 | { | |
875 | #ifdef CONFIG_ACPI_HOTPLUG_CPU | |
876 | int action = UNINSTALL_NOTIFY_HANDLER; | |
877 | acpi_walk_namespace(ACPI_TYPE_PROCESSOR, | |
4be44fcd LB |
878 | ACPI_ROOT_OBJECT, |
879 | ACPI_UINT32_MAX, | |
880 | processor_walk_namespace_cb, &action, NULL); | |
1da177e4 LT |
881 | #endif |
882 | } | |
883 | ||
884 | /* | |
885 | * We keep the driver loaded even when ACPI is not running. | |
886 | * This is needed for the powernow-k8 driver, that works even without | |
887 | * ACPI, but needs symbols from this driver | |
888 | */ | |
889 | ||
4be44fcd | 890 | static int __init acpi_processor_init(void) |
1da177e4 | 891 | { |
4be44fcd | 892 | int result = 0; |
1da177e4 | 893 | |
1da177e4 LT |
894 | |
895 | memset(&processors, 0, sizeof(processors)); | |
896 | memset(&errata, 0, sizeof(errata)); | |
897 | ||
898 | acpi_processor_dir = proc_mkdir(ACPI_PROCESSOR_CLASS, acpi_root_dir); | |
899 | if (!acpi_processor_dir) | |
83822fc9 | 900 | return -ENOMEM; |
1da177e4 LT |
901 | acpi_processor_dir->owner = THIS_MODULE; |
902 | ||
903 | result = acpi_bus_register_driver(&acpi_processor_driver); | |
904 | if (result < 0) { | |
905 | remove_proc_entry(ACPI_PROCESSOR_CLASS, acpi_root_dir); | |
83822fc9 | 906 | return result; |
1da177e4 LT |
907 | } |
908 | ||
909 | acpi_processor_install_hotplug_notify(); | |
910 | ||
911 | acpi_thermal_cpufreq_init(); | |
912 | ||
913 | acpi_processor_ppc_init(); | |
914 | ||
d550d98d | 915 | return 0; |
1da177e4 LT |
916 | } |
917 | ||
4be44fcd | 918 | static void __exit acpi_processor_exit(void) |
1da177e4 | 919 | { |
1da177e4 LT |
920 | |
921 | acpi_processor_ppc_exit(); | |
922 | ||
923 | acpi_thermal_cpufreq_exit(); | |
924 | ||
925 | acpi_processor_uninstall_hotplug_notify(); | |
926 | ||
927 | acpi_bus_unregister_driver(&acpi_processor_driver); | |
928 | ||
929 | remove_proc_entry(ACPI_PROCESSOR_CLASS, acpi_root_dir); | |
930 | ||
d550d98d | 931 | return; |
1da177e4 LT |
932 | } |
933 | ||
1da177e4 LT |
934 | module_init(acpi_processor_init); |
935 | module_exit(acpi_processor_exit); | |
936 | ||
937 | EXPORT_SYMBOL(acpi_processor_set_thermal_limit); | |
938 | ||
939 | MODULE_ALIAS("processor"); |