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1/*
2 * acpi_bus.c - ACPI Bus Driver ($Revision: 80 $)
3 *
4 * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
5 *
6 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or (at
11 * your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful, but
14 * WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License along
19 * with this program; if not, write to the Free Software Foundation, Inc.,
20 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
21 *
22 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
23 */
24
25#include <linux/module.h>
26#include <linux/init.h>
27#include <linux/ioport.h>
28#include <linux/kernel.h>
29#include <linux/list.h>
30#include <linux/sched.h>
31#include <linux/pm.h>
32#include <linux/device.h>
33#include <linux/proc_fs.h>
34#include <linux/acpi.h>
35#include <linux/slab.h>
36#ifdef CONFIG_X86
37#include <asm/mpspec.h>
38#endif
39#include <linux/pci.h>
40#include <acpi/acpi_bus.h>
41#include <acpi/acpi_drivers.h>
42#include <acpi/apei.h>
43#include <linux/dmi.h>
44#include <linux/suspend.h>
45
46#include "internal.h"
47
48#define _COMPONENT ACPI_BUS_COMPONENT
49ACPI_MODULE_NAME("bus");
50
51struct acpi_device *acpi_root;
52struct proc_dir_entry *acpi_root_dir;
53EXPORT_SYMBOL(acpi_root_dir);
54
55#define STRUCT_TO_INT(s) (*((int*)&s))
56
57
58#ifdef CONFIG_X86
59static int set_copy_dsdt(const struct dmi_system_id *id)
60{
61 printk(KERN_NOTICE "%s detected - "
62 "force copy of DSDT to local memory\n", id->ident);
63 acpi_gbl_copy_dsdt_locally = 1;
64 return 0;
65}
66
67static struct dmi_system_id dsdt_dmi_table[] __initdata = {
68 /*
69 * Invoke DSDT corruption work-around on all Toshiba Satellite.
70 * https://bugzilla.kernel.org/show_bug.cgi?id=14679
71 */
72 {
73 .callback = set_copy_dsdt,
74 .ident = "TOSHIBA Satellite",
75 .matches = {
76 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
77 DMI_MATCH(DMI_PRODUCT_NAME, "Satellite"),
78 },
79 },
80 {}
81};
82#else
83static struct dmi_system_id dsdt_dmi_table[] __initdata = {
84 {}
85};
86#endif
87
88/* --------------------------------------------------------------------------
89 Device Management
90 -------------------------------------------------------------------------- */
91
92int acpi_bus_get_device(acpi_handle handle, struct acpi_device **device)
93{
94 acpi_status status = AE_OK;
95
96
97 if (!device)
98 return -EINVAL;
99
100 /* TBD: Support fixed-feature devices */
101
102 status = acpi_get_data(handle, acpi_bus_data_handler, (void **)device);
103 if (ACPI_FAILURE(status) || !*device) {
104 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No context for object [%p]\n",
105 handle));
106 return -ENODEV;
107 }
108
109 return 0;
110}
111
112EXPORT_SYMBOL(acpi_bus_get_device);
113
114acpi_status acpi_bus_get_status_handle(acpi_handle handle,
115 unsigned long long *sta)
116{
117 acpi_status status;
118
119 status = acpi_evaluate_integer(handle, "_STA", NULL, sta);
120 if (ACPI_SUCCESS(status))
121 return AE_OK;
122
123 if (status == AE_NOT_FOUND) {
124 *sta = ACPI_STA_DEVICE_PRESENT | ACPI_STA_DEVICE_ENABLED |
125 ACPI_STA_DEVICE_UI | ACPI_STA_DEVICE_FUNCTIONING;
126 return AE_OK;
127 }
128 return status;
129}
130
131int acpi_bus_get_status(struct acpi_device *device)
132{
133 acpi_status status;
134 unsigned long long sta;
135
136 status = acpi_bus_get_status_handle(device->handle, &sta);
137 if (ACPI_FAILURE(status))
138 return -ENODEV;
139
140 STRUCT_TO_INT(device->status) = (int) sta;
141
142 if (device->status.functional && !device->status.present) {
143 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] status [%08x]: "
144 "functional but not present;\n",
145 device->pnp.bus_id,
146 (u32) STRUCT_TO_INT(device->status)));
147 }
148
149 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] status [%08x]\n",
150 device->pnp.bus_id,
151 (u32) STRUCT_TO_INT(device->status)));
152 return 0;
153}
154EXPORT_SYMBOL(acpi_bus_get_status);
155
156void acpi_bus_private_data_handler(acpi_handle handle,
157 void *context)
158{
159 return;
160}
161EXPORT_SYMBOL(acpi_bus_private_data_handler);
162
163int acpi_bus_get_private_data(acpi_handle handle, void **data)
164{
165 acpi_status status = AE_OK;
166
167 if (!*data)
168 return -EINVAL;
169
170 status = acpi_get_data(handle, acpi_bus_private_data_handler, data);
171 if (ACPI_FAILURE(status) || !*data) {
172 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No context for object [%p]\n",
173 handle));
174 return -ENODEV;
175 }
176
177 return 0;
178}
179EXPORT_SYMBOL(acpi_bus_get_private_data);
180
181/* --------------------------------------------------------------------------
182 Power Management
183 -------------------------------------------------------------------------- */
184
185static int __acpi_bus_get_power(struct acpi_device *device, int *state)
186{
187 int result = 0;
188 acpi_status status = 0;
189 unsigned long long psc = 0;
190
191 if (!device || !state)
192 return -EINVAL;
193
194 *state = ACPI_STATE_UNKNOWN;
195
196 if (device->flags.power_manageable) {
197 /*
198 * Get the device's power state either directly (via _PSC) or
199 * indirectly (via power resources).
200 */
201 if (device->power.flags.power_resources) {
202 result = acpi_power_get_inferred_state(device, state);
203 if (result)
204 return result;
205 } else if (device->power.flags.explicit_get) {
206 status = acpi_evaluate_integer(device->handle, "_PSC",
207 NULL, &psc);
208 if (ACPI_FAILURE(status))
209 return -ENODEV;
210 *state = (int)psc;
211 }
212 } else {
213 /* TBD: Non-recursive algorithm for walking up hierarchy. */
214 *state = device->parent ?
215 device->parent->power.state : ACPI_STATE_D0;
216 }
217
218 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] power state is D%d\n",
219 device->pnp.bus_id, *state));
220
221 return 0;
222}
223
224
225static int __acpi_bus_set_power(struct acpi_device *device, int state)
226{
227 int result = 0;
228 acpi_status status = AE_OK;
229 char object_name[5] = { '_', 'P', 'S', '0' + state, '\0' };
230
231 if (!device || (state < ACPI_STATE_D0) || (state > ACPI_STATE_D3_COLD))
232 return -EINVAL;
233
234 /* Make sure this is a valid target state */
235
236 if (state == device->power.state) {
237 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device is already at D%d\n",
238 state));
239 return 0;
240 }
241
242 if (!device->power.states[state].flags.valid) {
243 printk(KERN_WARNING PREFIX "Device does not support D%d\n", state);
244 return -ENODEV;
245 }
246 if (device->parent && (state < device->parent->power.state)) {
247 printk(KERN_WARNING PREFIX
248 "Cannot set device to a higher-powered"
249 " state than parent\n");
250 return -ENODEV;
251 }
252
253 /*
254 * Transition Power
255 * ----------------
256 * On transitions to a high-powered state we first apply power (via
257 * power resources) then evalute _PSx. Conversly for transitions to
258 * a lower-powered state.
259 */
260 if (state < device->power.state) {
261 if (device->power.flags.power_resources) {
262 result = acpi_power_transition(device, state);
263 if (result)
264 goto end;
265 }
266 if (device->power.states[state].flags.explicit_set) {
267 status = acpi_evaluate_object(device->handle,
268 object_name, NULL, NULL);
269 if (ACPI_FAILURE(status)) {
270 result = -ENODEV;
271 goto end;
272 }
273 }
274 } else {
275 if (device->power.states[state].flags.explicit_set) {
276 status = acpi_evaluate_object(device->handle,
277 object_name, NULL, NULL);
278 if (ACPI_FAILURE(status)) {
279 result = -ENODEV;
280 goto end;
281 }
282 }
283 if (device->power.flags.power_resources) {
284 result = acpi_power_transition(device, state);
285 if (result)
286 goto end;
287 }
288 }
289
290 end:
291 if (result)
292 printk(KERN_WARNING PREFIX
293 "Device [%s] failed to transition to D%d\n",
294 device->pnp.bus_id, state);
295 else {
296 device->power.state = state;
297 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
298 "Device [%s] transitioned to D%d\n",
299 device->pnp.bus_id, state));
300 }
301
302 return result;
303}
304
305
306int acpi_bus_set_power(acpi_handle handle, int state)
307{
308 struct acpi_device *device;
309 int result;
310
311 result = acpi_bus_get_device(handle, &device);
312 if (result)
313 return result;
314
315 if (!device->flags.power_manageable) {
316 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
317 "Device [%s] is not power manageable\n",
318 dev_name(&device->dev)));
319 return -ENODEV;
320 }
321
322 return __acpi_bus_set_power(device, state);
323}
324EXPORT_SYMBOL(acpi_bus_set_power);
325
326
327int acpi_bus_init_power(struct acpi_device *device)
328{
329 int state;
330 int result;
331
332 if (!device)
333 return -EINVAL;
334
335 device->power.state = ACPI_STATE_UNKNOWN;
336
337 result = __acpi_bus_get_power(device, &state);
338 if (result)
339 return result;
340
341 if (device->power.flags.power_resources)
342 result = acpi_power_on_resources(device, state);
343
344 if (!result)
345 device->power.state = state;
346
347 return result;
348}
349
350
351int acpi_bus_update_power(acpi_handle handle, int *state_p)
352{
353 struct acpi_device *device;
354 int state;
355 int result;
356
357 result = acpi_bus_get_device(handle, &device);
358 if (result)
359 return result;
360
361 result = __acpi_bus_get_power(device, &state);
362 if (result)
363 return result;
364
365 result = __acpi_bus_set_power(device, state);
366 if (!result && state_p)
367 *state_p = state;
368
369 return result;
370}
371EXPORT_SYMBOL_GPL(acpi_bus_update_power);
372
373
374bool acpi_bus_power_manageable(acpi_handle handle)
375{
376 struct acpi_device *device;
377 int result;
378
379 result = acpi_bus_get_device(handle, &device);
380 return result ? false : device->flags.power_manageable;
381}
382
383EXPORT_SYMBOL(acpi_bus_power_manageable);
384
385bool acpi_bus_can_wakeup(acpi_handle handle)
386{
387 struct acpi_device *device;
388 int result;
389
390 result = acpi_bus_get_device(handle, &device);
391 return result ? false : device->wakeup.flags.valid;
392}
393
394EXPORT_SYMBOL(acpi_bus_can_wakeup);
395
396static void acpi_print_osc_error(acpi_handle handle,
397 struct acpi_osc_context *context, char *error)
398{
399 struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER};
400 int i;
401
402 if (ACPI_FAILURE(acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer)))
403 printk(KERN_DEBUG "%s\n", error);
404 else {
405 printk(KERN_DEBUG "%s:%s\n", (char *)buffer.pointer, error);
406 kfree(buffer.pointer);
407 }
408 printk(KERN_DEBUG"_OSC request data:");
409 for (i = 0; i < context->cap.length; i += sizeof(u32))
410 printk("%x ", *((u32 *)(context->cap.pointer + i)));
411 printk("\n");
412}
413
414static acpi_status acpi_str_to_uuid(char *str, u8 *uuid)
415{
416 int i;
417 static int opc_map_to_uuid[16] = {6, 4, 2, 0, 11, 9, 16, 14, 19, 21,
418 24, 26, 28, 30, 32, 34};
419
420 if (strlen(str) != 36)
421 return AE_BAD_PARAMETER;
422 for (i = 0; i < 36; i++) {
423 if (i == 8 || i == 13 || i == 18 || i == 23) {
424 if (str[i] != '-')
425 return AE_BAD_PARAMETER;
426 } else if (!isxdigit(str[i]))
427 return AE_BAD_PARAMETER;
428 }
429 for (i = 0; i < 16; i++) {
430 uuid[i] = hex_to_bin(str[opc_map_to_uuid[i]]) << 4;
431 uuid[i] |= hex_to_bin(str[opc_map_to_uuid[i] + 1]);
432 }
433 return AE_OK;
434}
435
436acpi_status acpi_run_osc(acpi_handle handle, struct acpi_osc_context *context)
437{
438 acpi_status status;
439 struct acpi_object_list input;
440 union acpi_object in_params[4];
441 union acpi_object *out_obj;
442 u8 uuid[16];
443 u32 errors;
444 struct acpi_buffer output = {ACPI_ALLOCATE_BUFFER, NULL};
445
446 if (!context)
447 return AE_ERROR;
448 if (ACPI_FAILURE(acpi_str_to_uuid(context->uuid_str, uuid)))
449 return AE_ERROR;
450 context->ret.length = ACPI_ALLOCATE_BUFFER;
451 context->ret.pointer = NULL;
452
453 /* Setting up input parameters */
454 input.count = 4;
455 input.pointer = in_params;
456 in_params[0].type = ACPI_TYPE_BUFFER;
457 in_params[0].buffer.length = 16;
458 in_params[0].buffer.pointer = uuid;
459 in_params[1].type = ACPI_TYPE_INTEGER;
460 in_params[1].integer.value = context->rev;
461 in_params[2].type = ACPI_TYPE_INTEGER;
462 in_params[2].integer.value = context->cap.length/sizeof(u32);
463 in_params[3].type = ACPI_TYPE_BUFFER;
464 in_params[3].buffer.length = context->cap.length;
465 in_params[3].buffer.pointer = context->cap.pointer;
466
467 status = acpi_evaluate_object(handle, "_OSC", &input, &output);
468 if (ACPI_FAILURE(status))
469 return status;
470
471 if (!output.length)
472 return AE_NULL_OBJECT;
473
474 out_obj = output.pointer;
475 if (out_obj->type != ACPI_TYPE_BUFFER
476 || out_obj->buffer.length != context->cap.length) {
477 acpi_print_osc_error(handle, context,
478 "_OSC evaluation returned wrong type");
479 status = AE_TYPE;
480 goto out_kfree;
481 }
482 /* Need to ignore the bit0 in result code */
483 errors = *((u32 *)out_obj->buffer.pointer) & ~(1 << 0);
484 if (errors) {
485 if (errors & OSC_REQUEST_ERROR)
486 acpi_print_osc_error(handle, context,
487 "_OSC request failed");
488 if (errors & OSC_INVALID_UUID_ERROR)
489 acpi_print_osc_error(handle, context,
490 "_OSC invalid UUID");
491 if (errors & OSC_INVALID_REVISION_ERROR)
492 acpi_print_osc_error(handle, context,
493 "_OSC invalid revision");
494 if (errors & OSC_CAPABILITIES_MASK_ERROR) {
495 if (((u32 *)context->cap.pointer)[OSC_QUERY_TYPE]
496 & OSC_QUERY_ENABLE)
497 goto out_success;
498 status = AE_SUPPORT;
499 goto out_kfree;
500 }
501 status = AE_ERROR;
502 goto out_kfree;
503 }
504out_success:
505 context->ret.length = out_obj->buffer.length;
506 context->ret.pointer = kmalloc(context->ret.length, GFP_KERNEL);
507 if (!context->ret.pointer) {
508 status = AE_NO_MEMORY;
509 goto out_kfree;
510 }
511 memcpy(context->ret.pointer, out_obj->buffer.pointer,
512 context->ret.length);
513 status = AE_OK;
514
515out_kfree:
516 kfree(output.pointer);
517 if (status != AE_OK)
518 context->ret.pointer = NULL;
519 return status;
520}
521EXPORT_SYMBOL(acpi_run_osc);
522
523bool osc_sb_apei_support_acked;
524static u8 sb_uuid_str[] = "0811B06E-4A27-44F9-8D60-3CBBC22E7B48";
525static void acpi_bus_osc_support(void)
526{
527 u32 capbuf[2];
528 struct acpi_osc_context context = {
529 .uuid_str = sb_uuid_str,
530 .rev = 1,
531 .cap.length = 8,
532 .cap.pointer = capbuf,
533 };
534 acpi_handle handle;
535
536 capbuf[OSC_QUERY_TYPE] = OSC_QUERY_ENABLE;
537 capbuf[OSC_SUPPORT_TYPE] = OSC_SB_PR3_SUPPORT; /* _PR3 is in use */
538#if defined(CONFIG_ACPI_PROCESSOR_AGGREGATOR) ||\
539 defined(CONFIG_ACPI_PROCESSOR_AGGREGATOR_MODULE)
540 capbuf[OSC_SUPPORT_TYPE] |= OSC_SB_PAD_SUPPORT;
541#endif
542
543#if defined(CONFIG_ACPI_PROCESSOR) || defined(CONFIG_ACPI_PROCESSOR_MODULE)
544 capbuf[OSC_SUPPORT_TYPE] |= OSC_SB_PPC_OST_SUPPORT;
545#endif
546
547 if (!ghes_disable)
548 capbuf[OSC_SUPPORT_TYPE] |= OSC_SB_APEI_SUPPORT;
549 if (ACPI_FAILURE(acpi_get_handle(NULL, "\\_SB", &handle)))
550 return;
551 if (ACPI_SUCCESS(acpi_run_osc(handle, &context))) {
552 u32 *capbuf_ret = context.ret.pointer;
553 if (context.ret.length > OSC_SUPPORT_TYPE)
554 osc_sb_apei_support_acked =
555 capbuf_ret[OSC_SUPPORT_TYPE] & OSC_SB_APEI_SUPPORT;
556 kfree(context.ret.pointer);
557 }
558 /* do we need to check other returned cap? Sounds no */
559}
560
561/* --------------------------------------------------------------------------
562 Event Management
563 -------------------------------------------------------------------------- */
564
565#ifdef CONFIG_ACPI_PROC_EVENT
566static DEFINE_SPINLOCK(acpi_bus_event_lock);
567
568LIST_HEAD(acpi_bus_event_list);
569DECLARE_WAIT_QUEUE_HEAD(acpi_bus_event_queue);
570
571extern int event_is_open;
572
573int acpi_bus_generate_proc_event4(const char *device_class, const char *bus_id, u8 type, int data)
574{
575 struct acpi_bus_event *event;
576 unsigned long flags = 0;
577
578 /* drop event on the floor if no one's listening */
579 if (!event_is_open)
580 return 0;
581
582 event = kzalloc(sizeof(struct acpi_bus_event), GFP_ATOMIC);
583 if (!event)
584 return -ENOMEM;
585
586 strcpy(event->device_class, device_class);
587 strcpy(event->bus_id, bus_id);
588 event->type = type;
589 event->data = data;
590
591 spin_lock_irqsave(&acpi_bus_event_lock, flags);
592 list_add_tail(&event->node, &acpi_bus_event_list);
593 spin_unlock_irqrestore(&acpi_bus_event_lock, flags);
594
595 wake_up_interruptible(&acpi_bus_event_queue);
596
597 return 0;
598
599}
600
601EXPORT_SYMBOL_GPL(acpi_bus_generate_proc_event4);
602
603int acpi_bus_generate_proc_event(struct acpi_device *device, u8 type, int data)
604{
605 if (!device)
606 return -EINVAL;
607 return acpi_bus_generate_proc_event4(device->pnp.device_class,
608 device->pnp.bus_id, type, data);
609}
610
611EXPORT_SYMBOL(acpi_bus_generate_proc_event);
612
613int acpi_bus_receive_event(struct acpi_bus_event *event)
614{
615 unsigned long flags = 0;
616 struct acpi_bus_event *entry = NULL;
617
618 DECLARE_WAITQUEUE(wait, current);
619
620
621 if (!event)
622 return -EINVAL;
623
624 if (list_empty(&acpi_bus_event_list)) {
625
626 set_current_state(TASK_INTERRUPTIBLE);
627 add_wait_queue(&acpi_bus_event_queue, &wait);
628
629 if (list_empty(&acpi_bus_event_list))
630 schedule();
631
632 remove_wait_queue(&acpi_bus_event_queue, &wait);
633 set_current_state(TASK_RUNNING);
634
635 if (signal_pending(current))
636 return -ERESTARTSYS;
637 }
638
639 spin_lock_irqsave(&acpi_bus_event_lock, flags);
640 if (!list_empty(&acpi_bus_event_list)) {
641 entry = list_entry(acpi_bus_event_list.next,
642 struct acpi_bus_event, node);
643 list_del(&entry->node);
644 }
645 spin_unlock_irqrestore(&acpi_bus_event_lock, flags);
646
647 if (!entry)
648 return -ENODEV;
649
650 memcpy(event, entry, sizeof(struct acpi_bus_event));
651
652 kfree(entry);
653
654 return 0;
655}
656
657#endif /* CONFIG_ACPI_PROC_EVENT */
658
659/* --------------------------------------------------------------------------
660 Notification Handling
661 -------------------------------------------------------------------------- */
662
663static void acpi_bus_check_device(acpi_handle handle)
664{
665 struct acpi_device *device;
666 acpi_status status;
667 struct acpi_device_status old_status;
668
669 if (acpi_bus_get_device(handle, &device))
670 return;
671 if (!device)
672 return;
673
674 old_status = device->status;
675
676 /*
677 * Make sure this device's parent is present before we go about
678 * messing with the device.
679 */
680 if (device->parent && !device->parent->status.present) {
681 device->status = device->parent->status;
682 return;
683 }
684
685 status = acpi_bus_get_status(device);
686 if (ACPI_FAILURE(status))
687 return;
688
689 if (STRUCT_TO_INT(old_status) == STRUCT_TO_INT(device->status))
690 return;
691
692 /*
693 * Device Insertion/Removal
694 */
695 if ((device->status.present) && !(old_status.present)) {
696 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device insertion detected\n"));
697 /* TBD: Handle device insertion */
698 } else if (!(device->status.present) && (old_status.present)) {
699 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device removal detected\n"));
700 /* TBD: Handle device removal */
701 }
702}
703
704static void acpi_bus_check_scope(acpi_handle handle)
705{
706 /* Status Change? */
707 acpi_bus_check_device(handle);
708
709 /*
710 * TBD: Enumerate child devices within this device's scope and
711 * run acpi_bus_check_device()'s on them.
712 */
713}
714
715static BLOCKING_NOTIFIER_HEAD(acpi_bus_notify_list);
716int register_acpi_bus_notifier(struct notifier_block *nb)
717{
718 return blocking_notifier_chain_register(&acpi_bus_notify_list, nb);
719}
720EXPORT_SYMBOL_GPL(register_acpi_bus_notifier);
721
722void unregister_acpi_bus_notifier(struct notifier_block *nb)
723{
724 blocking_notifier_chain_unregister(&acpi_bus_notify_list, nb);
725}
726EXPORT_SYMBOL_GPL(unregister_acpi_bus_notifier);
727
728/**
729 * acpi_bus_notify
730 * ---------------
731 * Callback for all 'system-level' device notifications (values 0x00-0x7F).
732 */
733static void acpi_bus_notify(acpi_handle handle, u32 type, void *data)
734{
735 struct acpi_device *device = NULL;
736 struct acpi_driver *driver;
737
738 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Notification %#02x to handle %p\n",
739 type, handle));
740
741 blocking_notifier_call_chain(&acpi_bus_notify_list,
742 type, (void *)handle);
743
744 switch (type) {
745
746 case ACPI_NOTIFY_BUS_CHECK:
747 acpi_bus_check_scope(handle);
748 /*
749 * TBD: We'll need to outsource certain events to non-ACPI
750 * drivers via the device manager (device.c).
751 */
752 break;
753
754 case ACPI_NOTIFY_DEVICE_CHECK:
755 acpi_bus_check_device(handle);
756 /*
757 * TBD: We'll need to outsource certain events to non-ACPI
758 * drivers via the device manager (device.c).
759 */
760 break;
761
762 case ACPI_NOTIFY_DEVICE_WAKE:
763 /* TBD */
764 break;
765
766 case ACPI_NOTIFY_EJECT_REQUEST:
767 /* TBD */
768 break;
769
770 case ACPI_NOTIFY_DEVICE_CHECK_LIGHT:
771 /* TBD: Exactly what does 'light' mean? */
772 break;
773
774 case ACPI_NOTIFY_FREQUENCY_MISMATCH:
775 /* TBD */
776 break;
777
778 case ACPI_NOTIFY_BUS_MODE_MISMATCH:
779 /* TBD */
780 break;
781
782 case ACPI_NOTIFY_POWER_FAULT:
783 /* TBD */
784 break;
785
786 default:
787 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
788 "Received unknown/unsupported notification [%08x]\n",
789 type));
790 break;
791 }
792
793 acpi_bus_get_device(handle, &device);
794 if (device) {
795 driver = device->driver;
796 if (driver && driver->ops.notify &&
797 (driver->flags & ACPI_DRIVER_ALL_NOTIFY_EVENTS))
798 driver->ops.notify(device, type);
799 }
800}
801
802/* --------------------------------------------------------------------------
803 Initialization/Cleanup
804 -------------------------------------------------------------------------- */
805
806static int __init acpi_bus_init_irq(void)
807{
808 acpi_status status = AE_OK;
809 union acpi_object arg = { ACPI_TYPE_INTEGER };
810 struct acpi_object_list arg_list = { 1, &arg };
811 char *message = NULL;
812
813
814 /*
815 * Let the system know what interrupt model we are using by
816 * evaluating the \_PIC object, if exists.
817 */
818
819 switch (acpi_irq_model) {
820 case ACPI_IRQ_MODEL_PIC:
821 message = "PIC";
822 break;
823 case ACPI_IRQ_MODEL_IOAPIC:
824 message = "IOAPIC";
825 break;
826 case ACPI_IRQ_MODEL_IOSAPIC:
827 message = "IOSAPIC";
828 break;
829 case ACPI_IRQ_MODEL_PLATFORM:
830 message = "platform specific model";
831 break;
832 default:
833 printk(KERN_WARNING PREFIX "Unknown interrupt routing model\n");
834 return -ENODEV;
835 }
836
837 printk(KERN_INFO PREFIX "Using %s for interrupt routing\n", message);
838
839 arg.integer.value = acpi_irq_model;
840
841 status = acpi_evaluate_object(NULL, "\\_PIC", &arg_list, NULL);
842 if (ACPI_FAILURE(status) && (status != AE_NOT_FOUND)) {
843 ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PIC"));
844 return -ENODEV;
845 }
846
847 return 0;
848}
849
850u8 acpi_gbl_permanent_mmap;
851
852
853void __init acpi_early_init(void)
854{
855 acpi_status status = AE_OK;
856
857 if (acpi_disabled)
858 return;
859
860 printk(KERN_INFO PREFIX "Core revision %08x\n", ACPI_CA_VERSION);
861
862 /* enable workarounds, unless strict ACPI spec. compliance */
863 if (!acpi_strict)
864 acpi_gbl_enable_interpreter_slack = TRUE;
865
866 acpi_gbl_permanent_mmap = 1;
867
868 /*
869 * If the machine falls into the DMI check table,
870 * DSDT will be copied to memory
871 */
872 dmi_check_system(dsdt_dmi_table);
873
874 status = acpi_reallocate_root_table();
875 if (ACPI_FAILURE(status)) {
876 printk(KERN_ERR PREFIX
877 "Unable to reallocate ACPI tables\n");
878 goto error0;
879 }
880
881 status = acpi_initialize_subsystem();
882 if (ACPI_FAILURE(status)) {
883 printk(KERN_ERR PREFIX
884 "Unable to initialize the ACPI Interpreter\n");
885 goto error0;
886 }
887
888 status = acpi_load_tables();
889 if (ACPI_FAILURE(status)) {
890 printk(KERN_ERR PREFIX
891 "Unable to load the System Description Tables\n");
892 goto error0;
893 }
894
895#ifdef CONFIG_X86
896 if (!acpi_ioapic) {
897 /* compatible (0) means level (3) */
898 if (!(acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)) {
899 acpi_sci_flags &= ~ACPI_MADT_TRIGGER_MASK;
900 acpi_sci_flags |= ACPI_MADT_TRIGGER_LEVEL;
901 }
902 /* Set PIC-mode SCI trigger type */
903 acpi_pic_sci_set_trigger(acpi_gbl_FADT.sci_interrupt,
904 (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2);
905 } else {
906 /*
907 * now that acpi_gbl_FADT is initialized,
908 * update it with result from INT_SRC_OVR parsing
909 */
910 acpi_gbl_FADT.sci_interrupt = acpi_sci_override_gsi;
911 }
912#endif
913
914 status =
915 acpi_enable_subsystem(~
916 (ACPI_NO_HARDWARE_INIT |
917 ACPI_NO_ACPI_ENABLE));
918 if (ACPI_FAILURE(status)) {
919 printk(KERN_ERR PREFIX "Unable to enable ACPI\n");
920 goto error0;
921 }
922
923 return;
924
925 error0:
926 disable_acpi();
927 return;
928}
929
930static int __init acpi_bus_init(void)
931{
932 int result = 0;
933 acpi_status status = AE_OK;
934 extern acpi_status acpi_os_initialize1(void);
935
936 acpi_os_initialize1();
937
938 status =
939 acpi_enable_subsystem(ACPI_NO_HARDWARE_INIT | ACPI_NO_ACPI_ENABLE);
940 if (ACPI_FAILURE(status)) {
941 printk(KERN_ERR PREFIX
942 "Unable to start the ACPI Interpreter\n");
943 goto error1;
944 }
945
946 /*
947 * ACPI 2.0 requires the EC driver to be loaded and work before
948 * the EC device is found in the namespace (i.e. before acpi_initialize_objects()
949 * is called).
950 *
951 * This is accomplished by looking for the ECDT table, and getting
952 * the EC parameters out of that.
953 */
954 status = acpi_ec_ecdt_probe();
955 /* Ignore result. Not having an ECDT is not fatal. */
956
957 acpi_bus_osc_support();
958
959 status = acpi_initialize_objects(ACPI_FULL_INITIALIZATION);
960 if (ACPI_FAILURE(status)) {
961 printk(KERN_ERR PREFIX "Unable to initialize ACPI objects\n");
962 goto error1;
963 }
964
965 /*
966 * _PDC control method may load dynamic SSDT tables,
967 * and we need to install the table handler before that.
968 */
969 acpi_sysfs_init();
970
971 acpi_early_processor_set_pdc();
972
973 /*
974 * Maybe EC region is required at bus_scan/acpi_get_devices. So it
975 * is necessary to enable it as early as possible.
976 */
977 acpi_boot_ec_enable();
978
979 printk(KERN_INFO PREFIX "Interpreter enabled\n");
980
981 /* Initialize sleep structures */
982 acpi_sleep_init();
983
984 /*
985 * Get the system interrupt model and evaluate \_PIC.
986 */
987 result = acpi_bus_init_irq();
988 if (result)
989 goto error1;
990
991 /*
992 * Register the for all standard device notifications.
993 */
994 status =
995 acpi_install_notify_handler(ACPI_ROOT_OBJECT, ACPI_SYSTEM_NOTIFY,
996 &acpi_bus_notify, NULL);
997 if (ACPI_FAILURE(status)) {
998 printk(KERN_ERR PREFIX
999 "Unable to register for device notifications\n");
1000 goto error1;
1001 }
1002
1003 /*
1004 * Create the top ACPI proc directory
1005 */
1006 acpi_root_dir = proc_mkdir(ACPI_BUS_FILE_ROOT, NULL);
1007
1008 return 0;
1009
1010 /* Mimic structured exception handling */
1011 error1:
1012 acpi_terminate();
1013 return -ENODEV;
1014}
1015
1016struct kobject *acpi_kobj;
1017
1018static int __init acpi_init(void)
1019{
1020 int result;
1021
1022 if (acpi_disabled) {
1023 printk(KERN_INFO PREFIX "Interpreter disabled.\n");
1024 return -ENODEV;
1025 }
1026
1027 acpi_kobj = kobject_create_and_add("acpi", firmware_kobj);
1028 if (!acpi_kobj) {
1029 printk(KERN_WARNING "%s: kset create error\n", __func__);
1030 acpi_kobj = NULL;
1031 }
1032
1033 init_acpi_device_notify();
1034 result = acpi_bus_init();
1035 if (result) {
1036 disable_acpi();
1037 return result;
1038 }
1039
1040 pci_mmcfg_late_init();
1041 acpi_scan_init();
1042 acpi_ec_init();
1043 acpi_debugfs_init();
1044 acpi_sleep_proc_init();
1045 acpi_wakeup_device_init();
1046 return 0;
1047}
1048
1049subsys_initcall(acpi_init);
1/*
2 * acpi_bus.c - ACPI Bus Driver ($Revision: 80 $)
3 *
4 * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
5 *
6 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; either version 2 of the License, or (at
11 * your option) any later version.
12 *
13 * This program is distributed in the hope that it will be useful, but
14 * WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License along
19 * with this program; if not, write to the Free Software Foundation, Inc.,
20 * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
21 *
22 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
23 */
24
25#include <linux/module.h>
26#include <linux/init.h>
27#include <linux/ioport.h>
28#include <linux/kernel.h>
29#include <linux/list.h>
30#include <linux/sched.h>
31#include <linux/pm.h>
32#include <linux/device.h>
33#include <linux/proc_fs.h>
34#include <linux/acpi.h>
35#include <linux/slab.h>
36#ifdef CONFIG_X86
37#include <asm/mpspec.h>
38#endif
39#include <linux/pci.h>
40#include <acpi/acpi_bus.h>
41#include <acpi/acpi_drivers.h>
42#include <acpi/apei.h>
43#include <linux/dmi.h>
44#include <linux/suspend.h>
45
46#include "internal.h"
47
48#define _COMPONENT ACPI_BUS_COMPONENT
49ACPI_MODULE_NAME("bus");
50
51struct acpi_device *acpi_root;
52struct proc_dir_entry *acpi_root_dir;
53EXPORT_SYMBOL(acpi_root_dir);
54
55#define STRUCT_TO_INT(s) (*((int*)&s))
56
57
58#ifdef CONFIG_X86
59static int set_copy_dsdt(const struct dmi_system_id *id)
60{
61 printk(KERN_NOTICE "%s detected - "
62 "force copy of DSDT to local memory\n", id->ident);
63 acpi_gbl_copy_dsdt_locally = 1;
64 return 0;
65}
66
67static struct dmi_system_id dsdt_dmi_table[] __initdata = {
68 /*
69 * Invoke DSDT corruption work-around on all Toshiba Satellite.
70 * https://bugzilla.kernel.org/show_bug.cgi?id=14679
71 */
72 {
73 .callback = set_copy_dsdt,
74 .ident = "TOSHIBA Satellite",
75 .matches = {
76 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
77 DMI_MATCH(DMI_PRODUCT_NAME, "Satellite"),
78 },
79 },
80 {}
81};
82#else
83static struct dmi_system_id dsdt_dmi_table[] __initdata = {
84 {}
85};
86#endif
87
88/* --------------------------------------------------------------------------
89 Device Management
90 -------------------------------------------------------------------------- */
91
92int acpi_bus_get_device(acpi_handle handle, struct acpi_device **device)
93{
94 acpi_status status = AE_OK;
95
96
97 if (!device)
98 return -EINVAL;
99
100 /* TBD: Support fixed-feature devices */
101
102 status = acpi_get_data(handle, acpi_bus_data_handler, (void **)device);
103 if (ACPI_FAILURE(status) || !*device) {
104 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No context for object [%p]\n",
105 handle));
106 return -ENODEV;
107 }
108
109 return 0;
110}
111
112EXPORT_SYMBOL(acpi_bus_get_device);
113
114acpi_status acpi_bus_get_status_handle(acpi_handle handle,
115 unsigned long long *sta)
116{
117 acpi_status status;
118
119 status = acpi_evaluate_integer(handle, "_STA", NULL, sta);
120 if (ACPI_SUCCESS(status))
121 return AE_OK;
122
123 if (status == AE_NOT_FOUND) {
124 *sta = ACPI_STA_DEVICE_PRESENT | ACPI_STA_DEVICE_ENABLED |
125 ACPI_STA_DEVICE_UI | ACPI_STA_DEVICE_FUNCTIONING;
126 return AE_OK;
127 }
128 return status;
129}
130
131int acpi_bus_get_status(struct acpi_device *device)
132{
133 acpi_status status;
134 unsigned long long sta;
135
136 status = acpi_bus_get_status_handle(device->handle, &sta);
137 if (ACPI_FAILURE(status))
138 return -ENODEV;
139
140 STRUCT_TO_INT(device->status) = (int) sta;
141
142 if (device->status.functional && !device->status.present) {
143 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] status [%08x]: "
144 "functional but not present;\n",
145 device->pnp.bus_id,
146 (u32) STRUCT_TO_INT(device->status)));
147 }
148
149 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] status [%08x]\n",
150 device->pnp.bus_id,
151 (u32) STRUCT_TO_INT(device->status)));
152 return 0;
153}
154EXPORT_SYMBOL(acpi_bus_get_status);
155
156void acpi_bus_private_data_handler(acpi_handle handle,
157 void *context)
158{
159 return;
160}
161EXPORT_SYMBOL(acpi_bus_private_data_handler);
162
163int acpi_bus_get_private_data(acpi_handle handle, void **data)
164{
165 acpi_status status = AE_OK;
166
167 if (!*data)
168 return -EINVAL;
169
170 status = acpi_get_data(handle, acpi_bus_private_data_handler, data);
171 if (ACPI_FAILURE(status) || !*data) {
172 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No context for object [%p]\n",
173 handle));
174 return -ENODEV;
175 }
176
177 return 0;
178}
179EXPORT_SYMBOL(acpi_bus_get_private_data);
180
181/* --------------------------------------------------------------------------
182 Power Management
183 -------------------------------------------------------------------------- */
184
185static const char *state_string(int state)
186{
187 switch (state) {
188 case ACPI_STATE_D0:
189 return "D0";
190 case ACPI_STATE_D1:
191 return "D1";
192 case ACPI_STATE_D2:
193 return "D2";
194 case ACPI_STATE_D3_HOT:
195 return "D3hot";
196 case ACPI_STATE_D3_COLD:
197 return "D3";
198 default:
199 return "(unknown)";
200 }
201}
202
203static int __acpi_bus_get_power(struct acpi_device *device, int *state)
204{
205 int result = ACPI_STATE_UNKNOWN;
206
207 if (!device || !state)
208 return -EINVAL;
209
210 if (!device->flags.power_manageable) {
211 /* TBD: Non-recursive algorithm for walking up hierarchy. */
212 *state = device->parent ?
213 device->parent->power.state : ACPI_STATE_D0;
214 goto out;
215 }
216
217 /*
218 * Get the device's power state either directly (via _PSC) or
219 * indirectly (via power resources).
220 */
221 if (device->power.flags.explicit_get) {
222 unsigned long long psc;
223 acpi_status status = acpi_evaluate_integer(device->handle,
224 "_PSC", NULL, &psc);
225 if (ACPI_FAILURE(status))
226 return -ENODEV;
227
228 result = psc;
229 }
230 /* The test below covers ACPI_STATE_UNKNOWN too. */
231 if (result <= ACPI_STATE_D2) {
232 ; /* Do nothing. */
233 } else if (device->power.flags.power_resources) {
234 int error = acpi_power_get_inferred_state(device, &result);
235 if (error)
236 return error;
237 } else if (result == ACPI_STATE_D3_HOT) {
238 result = ACPI_STATE_D3;
239 }
240
241 /*
242 * If we were unsure about the device parent's power state up to this
243 * point, the fact that the device is in D0 implies that the parent has
244 * to be in D0 too.
245 */
246 if (device->parent && device->parent->power.state == ACPI_STATE_UNKNOWN
247 && result == ACPI_STATE_D0)
248 device->parent->power.state = ACPI_STATE_D0;
249
250 *state = result;
251
252 out:
253 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] power state is %s\n",
254 device->pnp.bus_id, state_string(*state)));
255
256 return 0;
257}
258
259
260static int __acpi_bus_set_power(struct acpi_device *device, int state)
261{
262 int result = 0;
263 acpi_status status = AE_OK;
264 char object_name[5] = { '_', 'P', 'S', '0' + state, '\0' };
265
266 if (!device || (state < ACPI_STATE_D0) || (state > ACPI_STATE_D3_COLD))
267 return -EINVAL;
268
269 /* Make sure this is a valid target state */
270
271 if (state == device->power.state) {
272 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device is already at %s\n",
273 state_string(state)));
274 return 0;
275 }
276
277 if (!device->power.states[state].flags.valid) {
278 printk(KERN_WARNING PREFIX "Device does not support %s\n",
279 state_string(state));
280 return -ENODEV;
281 }
282 if (device->parent && (state < device->parent->power.state)) {
283 printk(KERN_WARNING PREFIX
284 "Cannot set device to a higher-powered"
285 " state than parent\n");
286 return -ENODEV;
287 }
288
289 /* For D3cold we should execute _PS3, not _PS4. */
290 if (state == ACPI_STATE_D3_COLD)
291 object_name[3] = '3';
292
293 /*
294 * Transition Power
295 * ----------------
296 * On transitions to a high-powered state we first apply power (via
297 * power resources) then evalute _PSx. Conversly for transitions to
298 * a lower-powered state.
299 */
300 if (state < device->power.state) {
301 if (device->power.flags.power_resources) {
302 result = acpi_power_transition(device, state);
303 if (result)
304 goto end;
305 }
306 if (device->power.states[state].flags.explicit_set) {
307 status = acpi_evaluate_object(device->handle,
308 object_name, NULL, NULL);
309 if (ACPI_FAILURE(status)) {
310 result = -ENODEV;
311 goto end;
312 }
313 }
314 } else {
315 if (device->power.states[state].flags.explicit_set) {
316 status = acpi_evaluate_object(device->handle,
317 object_name, NULL, NULL);
318 if (ACPI_FAILURE(status)) {
319 result = -ENODEV;
320 goto end;
321 }
322 }
323 if (device->power.flags.power_resources) {
324 result = acpi_power_transition(device, state);
325 if (result)
326 goto end;
327 }
328 }
329
330 end:
331 if (result)
332 printk(KERN_WARNING PREFIX
333 "Device [%s] failed to transition to %s\n",
334 device->pnp.bus_id, state_string(state));
335 else {
336 device->power.state = state;
337 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
338 "Device [%s] transitioned to %s\n",
339 device->pnp.bus_id, state_string(state)));
340 }
341
342 return result;
343}
344
345
346int acpi_bus_set_power(acpi_handle handle, int state)
347{
348 struct acpi_device *device;
349 int result;
350
351 result = acpi_bus_get_device(handle, &device);
352 if (result)
353 return result;
354
355 if (!device->flags.power_manageable) {
356 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
357 "Device [%s] is not power manageable\n",
358 dev_name(&device->dev)));
359 return -ENODEV;
360 }
361
362 return __acpi_bus_set_power(device, state);
363}
364EXPORT_SYMBOL(acpi_bus_set_power);
365
366
367int acpi_bus_init_power(struct acpi_device *device)
368{
369 int state;
370 int result;
371
372 if (!device)
373 return -EINVAL;
374
375 device->power.state = ACPI_STATE_UNKNOWN;
376
377 result = __acpi_bus_get_power(device, &state);
378 if (result)
379 return result;
380
381 if (device->power.flags.power_resources)
382 result = acpi_power_on_resources(device, state);
383
384 if (!result)
385 device->power.state = state;
386
387 return result;
388}
389
390
391int acpi_bus_update_power(acpi_handle handle, int *state_p)
392{
393 struct acpi_device *device;
394 int state;
395 int result;
396
397 result = acpi_bus_get_device(handle, &device);
398 if (result)
399 return result;
400
401 result = __acpi_bus_get_power(device, &state);
402 if (result)
403 return result;
404
405 result = __acpi_bus_set_power(device, state);
406 if (!result && state_p)
407 *state_p = state;
408
409 return result;
410}
411EXPORT_SYMBOL_GPL(acpi_bus_update_power);
412
413
414bool acpi_bus_power_manageable(acpi_handle handle)
415{
416 struct acpi_device *device;
417 int result;
418
419 result = acpi_bus_get_device(handle, &device);
420 return result ? false : device->flags.power_manageable;
421}
422
423EXPORT_SYMBOL(acpi_bus_power_manageable);
424
425bool acpi_bus_can_wakeup(acpi_handle handle)
426{
427 struct acpi_device *device;
428 int result;
429
430 result = acpi_bus_get_device(handle, &device);
431 return result ? false : device->wakeup.flags.valid;
432}
433
434EXPORT_SYMBOL(acpi_bus_can_wakeup);
435
436static void acpi_print_osc_error(acpi_handle handle,
437 struct acpi_osc_context *context, char *error)
438{
439 struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER};
440 int i;
441
442 if (ACPI_FAILURE(acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer)))
443 printk(KERN_DEBUG "%s\n", error);
444 else {
445 printk(KERN_DEBUG "%s:%s\n", (char *)buffer.pointer, error);
446 kfree(buffer.pointer);
447 }
448 printk(KERN_DEBUG"_OSC request data:");
449 for (i = 0; i < context->cap.length; i += sizeof(u32))
450 printk("%x ", *((u32 *)(context->cap.pointer + i)));
451 printk("\n");
452}
453
454static acpi_status acpi_str_to_uuid(char *str, u8 *uuid)
455{
456 int i;
457 static int opc_map_to_uuid[16] = {6, 4, 2, 0, 11, 9, 16, 14, 19, 21,
458 24, 26, 28, 30, 32, 34};
459
460 if (strlen(str) != 36)
461 return AE_BAD_PARAMETER;
462 for (i = 0; i < 36; i++) {
463 if (i == 8 || i == 13 || i == 18 || i == 23) {
464 if (str[i] != '-')
465 return AE_BAD_PARAMETER;
466 } else if (!isxdigit(str[i]))
467 return AE_BAD_PARAMETER;
468 }
469 for (i = 0; i < 16; i++) {
470 uuid[i] = hex_to_bin(str[opc_map_to_uuid[i]]) << 4;
471 uuid[i] |= hex_to_bin(str[opc_map_to_uuid[i] + 1]);
472 }
473 return AE_OK;
474}
475
476acpi_status acpi_run_osc(acpi_handle handle, struct acpi_osc_context *context)
477{
478 acpi_status status;
479 struct acpi_object_list input;
480 union acpi_object in_params[4];
481 union acpi_object *out_obj;
482 u8 uuid[16];
483 u32 errors;
484 struct acpi_buffer output = {ACPI_ALLOCATE_BUFFER, NULL};
485
486 if (!context)
487 return AE_ERROR;
488 if (ACPI_FAILURE(acpi_str_to_uuid(context->uuid_str, uuid)))
489 return AE_ERROR;
490 context->ret.length = ACPI_ALLOCATE_BUFFER;
491 context->ret.pointer = NULL;
492
493 /* Setting up input parameters */
494 input.count = 4;
495 input.pointer = in_params;
496 in_params[0].type = ACPI_TYPE_BUFFER;
497 in_params[0].buffer.length = 16;
498 in_params[0].buffer.pointer = uuid;
499 in_params[1].type = ACPI_TYPE_INTEGER;
500 in_params[1].integer.value = context->rev;
501 in_params[2].type = ACPI_TYPE_INTEGER;
502 in_params[2].integer.value = context->cap.length/sizeof(u32);
503 in_params[3].type = ACPI_TYPE_BUFFER;
504 in_params[3].buffer.length = context->cap.length;
505 in_params[3].buffer.pointer = context->cap.pointer;
506
507 status = acpi_evaluate_object(handle, "_OSC", &input, &output);
508 if (ACPI_FAILURE(status))
509 return status;
510
511 if (!output.length)
512 return AE_NULL_OBJECT;
513
514 out_obj = output.pointer;
515 if (out_obj->type != ACPI_TYPE_BUFFER
516 || out_obj->buffer.length != context->cap.length) {
517 acpi_print_osc_error(handle, context,
518 "_OSC evaluation returned wrong type");
519 status = AE_TYPE;
520 goto out_kfree;
521 }
522 /* Need to ignore the bit0 in result code */
523 errors = *((u32 *)out_obj->buffer.pointer) & ~(1 << 0);
524 if (errors) {
525 if (errors & OSC_REQUEST_ERROR)
526 acpi_print_osc_error(handle, context,
527 "_OSC request failed");
528 if (errors & OSC_INVALID_UUID_ERROR)
529 acpi_print_osc_error(handle, context,
530 "_OSC invalid UUID");
531 if (errors & OSC_INVALID_REVISION_ERROR)
532 acpi_print_osc_error(handle, context,
533 "_OSC invalid revision");
534 if (errors & OSC_CAPABILITIES_MASK_ERROR) {
535 if (((u32 *)context->cap.pointer)[OSC_QUERY_TYPE]
536 & OSC_QUERY_ENABLE)
537 goto out_success;
538 status = AE_SUPPORT;
539 goto out_kfree;
540 }
541 status = AE_ERROR;
542 goto out_kfree;
543 }
544out_success:
545 context->ret.length = out_obj->buffer.length;
546 context->ret.pointer = kmalloc(context->ret.length, GFP_KERNEL);
547 if (!context->ret.pointer) {
548 status = AE_NO_MEMORY;
549 goto out_kfree;
550 }
551 memcpy(context->ret.pointer, out_obj->buffer.pointer,
552 context->ret.length);
553 status = AE_OK;
554
555out_kfree:
556 kfree(output.pointer);
557 if (status != AE_OK)
558 context->ret.pointer = NULL;
559 return status;
560}
561EXPORT_SYMBOL(acpi_run_osc);
562
563bool osc_sb_apei_support_acked;
564static u8 sb_uuid_str[] = "0811B06E-4A27-44F9-8D60-3CBBC22E7B48";
565static void acpi_bus_osc_support(void)
566{
567 u32 capbuf[2];
568 struct acpi_osc_context context = {
569 .uuid_str = sb_uuid_str,
570 .rev = 1,
571 .cap.length = 8,
572 .cap.pointer = capbuf,
573 };
574 acpi_handle handle;
575
576 capbuf[OSC_QUERY_TYPE] = OSC_QUERY_ENABLE;
577 capbuf[OSC_SUPPORT_TYPE] = OSC_SB_PR3_SUPPORT; /* _PR3 is in use */
578#if defined(CONFIG_ACPI_PROCESSOR_AGGREGATOR) ||\
579 defined(CONFIG_ACPI_PROCESSOR_AGGREGATOR_MODULE)
580 capbuf[OSC_SUPPORT_TYPE] |= OSC_SB_PAD_SUPPORT;
581#endif
582
583#if defined(CONFIG_ACPI_PROCESSOR) || defined(CONFIG_ACPI_PROCESSOR_MODULE)
584 capbuf[OSC_SUPPORT_TYPE] |= OSC_SB_PPC_OST_SUPPORT;
585#endif
586
587 if (!ghes_disable)
588 capbuf[OSC_SUPPORT_TYPE] |= OSC_SB_APEI_SUPPORT;
589 if (ACPI_FAILURE(acpi_get_handle(NULL, "\\_SB", &handle)))
590 return;
591 if (ACPI_SUCCESS(acpi_run_osc(handle, &context))) {
592 u32 *capbuf_ret = context.ret.pointer;
593 if (context.ret.length > OSC_SUPPORT_TYPE)
594 osc_sb_apei_support_acked =
595 capbuf_ret[OSC_SUPPORT_TYPE] & OSC_SB_APEI_SUPPORT;
596 kfree(context.ret.pointer);
597 }
598 /* do we need to check other returned cap? Sounds no */
599}
600
601/* --------------------------------------------------------------------------
602 Event Management
603 -------------------------------------------------------------------------- */
604
605#ifdef CONFIG_ACPI_PROC_EVENT
606static DEFINE_SPINLOCK(acpi_bus_event_lock);
607
608LIST_HEAD(acpi_bus_event_list);
609DECLARE_WAIT_QUEUE_HEAD(acpi_bus_event_queue);
610
611extern int event_is_open;
612
613int acpi_bus_generate_proc_event4(const char *device_class, const char *bus_id, u8 type, int data)
614{
615 struct acpi_bus_event *event;
616 unsigned long flags = 0;
617
618 /* drop event on the floor if no one's listening */
619 if (!event_is_open)
620 return 0;
621
622 event = kzalloc(sizeof(struct acpi_bus_event), GFP_ATOMIC);
623 if (!event)
624 return -ENOMEM;
625
626 strcpy(event->device_class, device_class);
627 strcpy(event->bus_id, bus_id);
628 event->type = type;
629 event->data = data;
630
631 spin_lock_irqsave(&acpi_bus_event_lock, flags);
632 list_add_tail(&event->node, &acpi_bus_event_list);
633 spin_unlock_irqrestore(&acpi_bus_event_lock, flags);
634
635 wake_up_interruptible(&acpi_bus_event_queue);
636
637 return 0;
638
639}
640
641EXPORT_SYMBOL_GPL(acpi_bus_generate_proc_event4);
642
643int acpi_bus_generate_proc_event(struct acpi_device *device, u8 type, int data)
644{
645 if (!device)
646 return -EINVAL;
647 return acpi_bus_generate_proc_event4(device->pnp.device_class,
648 device->pnp.bus_id, type, data);
649}
650
651EXPORT_SYMBOL(acpi_bus_generate_proc_event);
652
653int acpi_bus_receive_event(struct acpi_bus_event *event)
654{
655 unsigned long flags = 0;
656 struct acpi_bus_event *entry = NULL;
657
658 DECLARE_WAITQUEUE(wait, current);
659
660
661 if (!event)
662 return -EINVAL;
663
664 if (list_empty(&acpi_bus_event_list)) {
665
666 set_current_state(TASK_INTERRUPTIBLE);
667 add_wait_queue(&acpi_bus_event_queue, &wait);
668
669 if (list_empty(&acpi_bus_event_list))
670 schedule();
671
672 remove_wait_queue(&acpi_bus_event_queue, &wait);
673 set_current_state(TASK_RUNNING);
674
675 if (signal_pending(current))
676 return -ERESTARTSYS;
677 }
678
679 spin_lock_irqsave(&acpi_bus_event_lock, flags);
680 if (!list_empty(&acpi_bus_event_list)) {
681 entry = list_entry(acpi_bus_event_list.next,
682 struct acpi_bus_event, node);
683 list_del(&entry->node);
684 }
685 spin_unlock_irqrestore(&acpi_bus_event_lock, flags);
686
687 if (!entry)
688 return -ENODEV;
689
690 memcpy(event, entry, sizeof(struct acpi_bus_event));
691
692 kfree(entry);
693
694 return 0;
695}
696
697#endif /* CONFIG_ACPI_PROC_EVENT */
698
699/* --------------------------------------------------------------------------
700 Notification Handling
701 -------------------------------------------------------------------------- */
702
703static void acpi_bus_check_device(acpi_handle handle)
704{
705 struct acpi_device *device;
706 acpi_status status;
707 struct acpi_device_status old_status;
708
709 if (acpi_bus_get_device(handle, &device))
710 return;
711 if (!device)
712 return;
713
714 old_status = device->status;
715
716 /*
717 * Make sure this device's parent is present before we go about
718 * messing with the device.
719 */
720 if (device->parent && !device->parent->status.present) {
721 device->status = device->parent->status;
722 return;
723 }
724
725 status = acpi_bus_get_status(device);
726 if (ACPI_FAILURE(status))
727 return;
728
729 if (STRUCT_TO_INT(old_status) == STRUCT_TO_INT(device->status))
730 return;
731
732 /*
733 * Device Insertion/Removal
734 */
735 if ((device->status.present) && !(old_status.present)) {
736 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device insertion detected\n"));
737 /* TBD: Handle device insertion */
738 } else if (!(device->status.present) && (old_status.present)) {
739 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device removal detected\n"));
740 /* TBD: Handle device removal */
741 }
742}
743
744static void acpi_bus_check_scope(acpi_handle handle)
745{
746 /* Status Change? */
747 acpi_bus_check_device(handle);
748
749 /*
750 * TBD: Enumerate child devices within this device's scope and
751 * run acpi_bus_check_device()'s on them.
752 */
753}
754
755static BLOCKING_NOTIFIER_HEAD(acpi_bus_notify_list);
756int register_acpi_bus_notifier(struct notifier_block *nb)
757{
758 return blocking_notifier_chain_register(&acpi_bus_notify_list, nb);
759}
760EXPORT_SYMBOL_GPL(register_acpi_bus_notifier);
761
762void unregister_acpi_bus_notifier(struct notifier_block *nb)
763{
764 blocking_notifier_chain_unregister(&acpi_bus_notify_list, nb);
765}
766EXPORT_SYMBOL_GPL(unregister_acpi_bus_notifier);
767
768/**
769 * acpi_bus_notify
770 * ---------------
771 * Callback for all 'system-level' device notifications (values 0x00-0x7F).
772 */
773static void acpi_bus_notify(acpi_handle handle, u32 type, void *data)
774{
775 struct acpi_device *device = NULL;
776 struct acpi_driver *driver;
777
778 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Notification %#02x to handle %p\n",
779 type, handle));
780
781 blocking_notifier_call_chain(&acpi_bus_notify_list,
782 type, (void *)handle);
783
784 switch (type) {
785
786 case ACPI_NOTIFY_BUS_CHECK:
787 acpi_bus_check_scope(handle);
788 /*
789 * TBD: We'll need to outsource certain events to non-ACPI
790 * drivers via the device manager (device.c).
791 */
792 break;
793
794 case ACPI_NOTIFY_DEVICE_CHECK:
795 acpi_bus_check_device(handle);
796 /*
797 * TBD: We'll need to outsource certain events to non-ACPI
798 * drivers via the device manager (device.c).
799 */
800 break;
801
802 case ACPI_NOTIFY_DEVICE_WAKE:
803 /* TBD */
804 break;
805
806 case ACPI_NOTIFY_EJECT_REQUEST:
807 /* TBD */
808 break;
809
810 case ACPI_NOTIFY_DEVICE_CHECK_LIGHT:
811 /* TBD: Exactly what does 'light' mean? */
812 break;
813
814 case ACPI_NOTIFY_FREQUENCY_MISMATCH:
815 /* TBD */
816 break;
817
818 case ACPI_NOTIFY_BUS_MODE_MISMATCH:
819 /* TBD */
820 break;
821
822 case ACPI_NOTIFY_POWER_FAULT:
823 /* TBD */
824 break;
825
826 default:
827 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
828 "Received unknown/unsupported notification [%08x]\n",
829 type));
830 break;
831 }
832
833 acpi_bus_get_device(handle, &device);
834 if (device) {
835 driver = device->driver;
836 if (driver && driver->ops.notify &&
837 (driver->flags & ACPI_DRIVER_ALL_NOTIFY_EVENTS))
838 driver->ops.notify(device, type);
839 }
840}
841
842/* --------------------------------------------------------------------------
843 Initialization/Cleanup
844 -------------------------------------------------------------------------- */
845
846static int __init acpi_bus_init_irq(void)
847{
848 acpi_status status = AE_OK;
849 union acpi_object arg = { ACPI_TYPE_INTEGER };
850 struct acpi_object_list arg_list = { 1, &arg };
851 char *message = NULL;
852
853
854 /*
855 * Let the system know what interrupt model we are using by
856 * evaluating the \_PIC object, if exists.
857 */
858
859 switch (acpi_irq_model) {
860 case ACPI_IRQ_MODEL_PIC:
861 message = "PIC";
862 break;
863 case ACPI_IRQ_MODEL_IOAPIC:
864 message = "IOAPIC";
865 break;
866 case ACPI_IRQ_MODEL_IOSAPIC:
867 message = "IOSAPIC";
868 break;
869 case ACPI_IRQ_MODEL_PLATFORM:
870 message = "platform specific model";
871 break;
872 default:
873 printk(KERN_WARNING PREFIX "Unknown interrupt routing model\n");
874 return -ENODEV;
875 }
876
877 printk(KERN_INFO PREFIX "Using %s for interrupt routing\n", message);
878
879 arg.integer.value = acpi_irq_model;
880
881 status = acpi_evaluate_object(NULL, "\\_PIC", &arg_list, NULL);
882 if (ACPI_FAILURE(status) && (status != AE_NOT_FOUND)) {
883 ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PIC"));
884 return -ENODEV;
885 }
886
887 return 0;
888}
889
890u8 acpi_gbl_permanent_mmap;
891
892
893void __init acpi_early_init(void)
894{
895 acpi_status status = AE_OK;
896
897 if (acpi_disabled)
898 return;
899
900 printk(KERN_INFO PREFIX "Core revision %08x\n", ACPI_CA_VERSION);
901
902 /* enable workarounds, unless strict ACPI spec. compliance */
903 if (!acpi_strict)
904 acpi_gbl_enable_interpreter_slack = TRUE;
905
906 acpi_gbl_permanent_mmap = 1;
907
908 /*
909 * If the machine falls into the DMI check table,
910 * DSDT will be copied to memory
911 */
912 dmi_check_system(dsdt_dmi_table);
913
914 status = acpi_reallocate_root_table();
915 if (ACPI_FAILURE(status)) {
916 printk(KERN_ERR PREFIX
917 "Unable to reallocate ACPI tables\n");
918 goto error0;
919 }
920
921 status = acpi_initialize_subsystem();
922 if (ACPI_FAILURE(status)) {
923 printk(KERN_ERR PREFIX
924 "Unable to initialize the ACPI Interpreter\n");
925 goto error0;
926 }
927
928 status = acpi_load_tables();
929 if (ACPI_FAILURE(status)) {
930 printk(KERN_ERR PREFIX
931 "Unable to load the System Description Tables\n");
932 goto error0;
933 }
934
935#ifdef CONFIG_X86
936 if (!acpi_ioapic) {
937 /* compatible (0) means level (3) */
938 if (!(acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)) {
939 acpi_sci_flags &= ~ACPI_MADT_TRIGGER_MASK;
940 acpi_sci_flags |= ACPI_MADT_TRIGGER_LEVEL;
941 }
942 /* Set PIC-mode SCI trigger type */
943 acpi_pic_sci_set_trigger(acpi_gbl_FADT.sci_interrupt,
944 (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2);
945 } else {
946 /*
947 * now that acpi_gbl_FADT is initialized,
948 * update it with result from INT_SRC_OVR parsing
949 */
950 acpi_gbl_FADT.sci_interrupt = acpi_sci_override_gsi;
951 }
952#endif
953
954 status = acpi_enable_subsystem(~ACPI_NO_ACPI_ENABLE);
955 if (ACPI_FAILURE(status)) {
956 printk(KERN_ERR PREFIX "Unable to enable ACPI\n");
957 goto error0;
958 }
959
960 return;
961
962 error0:
963 disable_acpi();
964 return;
965}
966
967static int __init acpi_bus_init(void)
968{
969 int result = 0;
970 acpi_status status = AE_OK;
971 extern acpi_status acpi_os_initialize1(void);
972
973 acpi_os_initialize1();
974
975 status = acpi_enable_subsystem(ACPI_NO_ACPI_ENABLE);
976 if (ACPI_FAILURE(status)) {
977 printk(KERN_ERR PREFIX
978 "Unable to start the ACPI Interpreter\n");
979 goto error1;
980 }
981
982 /*
983 * ACPI 2.0 requires the EC driver to be loaded and work before
984 * the EC device is found in the namespace (i.e. before acpi_initialize_objects()
985 * is called).
986 *
987 * This is accomplished by looking for the ECDT table, and getting
988 * the EC parameters out of that.
989 */
990 status = acpi_ec_ecdt_probe();
991 /* Ignore result. Not having an ECDT is not fatal. */
992
993 acpi_bus_osc_support();
994
995 status = acpi_initialize_objects(ACPI_FULL_INITIALIZATION);
996 if (ACPI_FAILURE(status)) {
997 printk(KERN_ERR PREFIX "Unable to initialize ACPI objects\n");
998 goto error1;
999 }
1000
1001 /*
1002 * _PDC control method may load dynamic SSDT tables,
1003 * and we need to install the table handler before that.
1004 */
1005 acpi_sysfs_init();
1006
1007 acpi_early_processor_set_pdc();
1008
1009 /*
1010 * Maybe EC region is required at bus_scan/acpi_get_devices. So it
1011 * is necessary to enable it as early as possible.
1012 */
1013 acpi_boot_ec_enable();
1014
1015 printk(KERN_INFO PREFIX "Interpreter enabled\n");
1016
1017 /* Initialize sleep structures */
1018 acpi_sleep_init();
1019
1020 /*
1021 * Get the system interrupt model and evaluate \_PIC.
1022 */
1023 result = acpi_bus_init_irq();
1024 if (result)
1025 goto error1;
1026
1027 /*
1028 * Register the for all standard device notifications.
1029 */
1030 status =
1031 acpi_install_notify_handler(ACPI_ROOT_OBJECT, ACPI_SYSTEM_NOTIFY,
1032 &acpi_bus_notify, NULL);
1033 if (ACPI_FAILURE(status)) {
1034 printk(KERN_ERR PREFIX
1035 "Unable to register for device notifications\n");
1036 goto error1;
1037 }
1038
1039 /*
1040 * Create the top ACPI proc directory
1041 */
1042 acpi_root_dir = proc_mkdir(ACPI_BUS_FILE_ROOT, NULL);
1043
1044 return 0;
1045
1046 /* Mimic structured exception handling */
1047 error1:
1048 acpi_terminate();
1049 return -ENODEV;
1050}
1051
1052struct kobject *acpi_kobj;
1053EXPORT_SYMBOL_GPL(acpi_kobj);
1054
1055static int __init acpi_init(void)
1056{
1057 int result;
1058
1059 if (acpi_disabled) {
1060 printk(KERN_INFO PREFIX "Interpreter disabled.\n");
1061 return -ENODEV;
1062 }
1063
1064 acpi_kobj = kobject_create_and_add("acpi", firmware_kobj);
1065 if (!acpi_kobj) {
1066 printk(KERN_WARNING "%s: kset create error\n", __func__);
1067 acpi_kobj = NULL;
1068 }
1069
1070 init_acpi_device_notify();
1071 result = acpi_bus_init();
1072 if (result) {
1073 disable_acpi();
1074 return result;
1075 }
1076
1077 pci_mmcfg_late_init();
1078 acpi_scan_init();
1079 acpi_ec_init();
1080 acpi_debugfs_init();
1081 acpi_sleep_proc_init();
1082 acpi_wakeup_device_init();
1083 return 0;
1084}
1085
1086subsys_initcall(acpi_init);