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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
70
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
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
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
181static void acpi_print_osc_error(acpi_handle handle,
182 struct acpi_osc_context *context, char *error)
183{
184 struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER};
185 int i;
186
187 if (ACPI_FAILURE(acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer)))
188 printk(KERN_DEBUG "%s\n", error);
189 else {
190 printk(KERN_DEBUG "%s:%s\n", (char *)buffer.pointer, error);
191 kfree(buffer.pointer);
192 }
193 printk(KERN_DEBUG"_OSC request data:");
194 for (i = 0; i < context->cap.length; i += sizeof(u32))
195 printk("%x ", *((u32 *)(context->cap.pointer + i)));
196 printk("\n");
197}
198
199static acpi_status acpi_str_to_uuid(char *str, u8 *uuid)
200{
201 int i;
202 static int opc_map_to_uuid[16] = {6, 4, 2, 0, 11, 9, 16, 14, 19, 21,
203 24, 26, 28, 30, 32, 34};
204
205 if (strlen(str) != 36)
206 return AE_BAD_PARAMETER;
207 for (i = 0; i < 36; i++) {
208 if (i == 8 || i == 13 || i == 18 || i == 23) {
209 if (str[i] != '-')
210 return AE_BAD_PARAMETER;
211 } else if (!isxdigit(str[i]))
212 return AE_BAD_PARAMETER;
213 }
214 for (i = 0; i < 16; i++) {
215 uuid[i] = hex_to_bin(str[opc_map_to_uuid[i]]) << 4;
216 uuid[i] |= hex_to_bin(str[opc_map_to_uuid[i] + 1]);
217 }
218 return AE_OK;
219}
220
221acpi_status acpi_run_osc(acpi_handle handle, struct acpi_osc_context *context)
222{
223 acpi_status status;
224 struct acpi_object_list input;
225 union acpi_object in_params[4];
226 union acpi_object *out_obj;
227 u8 uuid[16];
228 u32 errors;
229 struct acpi_buffer output = {ACPI_ALLOCATE_BUFFER, NULL};
230
231 if (!context)
232 return AE_ERROR;
233 if (ACPI_FAILURE(acpi_str_to_uuid(context->uuid_str, uuid)))
234 return AE_ERROR;
235 context->ret.length = ACPI_ALLOCATE_BUFFER;
236 context->ret.pointer = NULL;
237
238
239 input.count = 4;
240 input.pointer = in_params;
241 in_params[0].type = ACPI_TYPE_BUFFER;
242 in_params[0].buffer.length = 16;
243 in_params[0].buffer.pointer = uuid;
244 in_params[1].type = ACPI_TYPE_INTEGER;
245 in_params[1].integer.value = context->rev;
246 in_params[2].type = ACPI_TYPE_INTEGER;
247 in_params[2].integer.value = context->cap.length/sizeof(u32);
248 in_params[3].type = ACPI_TYPE_BUFFER;
249 in_params[3].buffer.length = context->cap.length;
250 in_params[3].buffer.pointer = context->cap.pointer;
251
252 status = acpi_evaluate_object(handle, "_OSC", &input, &output);
253 if (ACPI_FAILURE(status))
254 return status;
255
256 if (!output.length)
257 return AE_NULL_OBJECT;
258
259 out_obj = output.pointer;
260 if (out_obj->type != ACPI_TYPE_BUFFER
261 || out_obj->buffer.length != context->cap.length) {
262 acpi_print_osc_error(handle, context,
263 "_OSC evaluation returned wrong type");
264 status = AE_TYPE;
265 goto out_kfree;
266 }
267
268 errors = *((u32 *)out_obj->buffer.pointer) & ~(1 << 0);
269 if (errors) {
270 if (errors & OSC_REQUEST_ERROR)
271 acpi_print_osc_error(handle, context,
272 "_OSC request failed");
273 if (errors & OSC_INVALID_UUID_ERROR)
274 acpi_print_osc_error(handle, context,
275 "_OSC invalid UUID");
276 if (errors & OSC_INVALID_REVISION_ERROR)
277 acpi_print_osc_error(handle, context,
278 "_OSC invalid revision");
279 if (errors & OSC_CAPABILITIES_MASK_ERROR) {
280 if (((u32 *)context->cap.pointer)[OSC_QUERY_TYPE]
281 & OSC_QUERY_ENABLE)
282 goto out_success;
283 status = AE_SUPPORT;
284 goto out_kfree;
285 }
286 status = AE_ERROR;
287 goto out_kfree;
288 }
289out_success:
290 context->ret.length = out_obj->buffer.length;
291 context->ret.pointer = kmemdup(out_obj->buffer.pointer,
292 context->ret.length, GFP_KERNEL);
293 if (!context->ret.pointer) {
294 status = AE_NO_MEMORY;
295 goto out_kfree;
296 }
297 status = AE_OK;
298
299out_kfree:
300 kfree(output.pointer);
301 if (status != AE_OK)
302 context->ret.pointer = NULL;
303 return status;
304}
305EXPORT_SYMBOL(acpi_run_osc);
306
307bool osc_sb_apei_support_acked;
308static u8 sb_uuid_str[] = "0811B06E-4A27-44F9-8D60-3CBBC22E7B48";
309static void acpi_bus_osc_support(void)
310{
311 u32 capbuf[2];
312 struct acpi_osc_context context = {
313 .uuid_str = sb_uuid_str,
314 .rev = 1,
315 .cap.length = 8,
316 .cap.pointer = capbuf,
317 };
318 acpi_handle handle;
319
320 capbuf[OSC_QUERY_TYPE] = OSC_QUERY_ENABLE;
321 capbuf[OSC_SUPPORT_TYPE] = OSC_SB_PR3_SUPPORT;
322#if defined(CONFIG_ACPI_PROCESSOR_AGGREGATOR) ||\
323 defined(CONFIG_ACPI_PROCESSOR_AGGREGATOR_MODULE)
324 capbuf[OSC_SUPPORT_TYPE] |= OSC_SB_PAD_SUPPORT;
325#endif
326
327#if defined(CONFIG_ACPI_PROCESSOR) || defined(CONFIG_ACPI_PROCESSOR_MODULE)
328 capbuf[OSC_SUPPORT_TYPE] |= OSC_SB_PPC_OST_SUPPORT;
329#endif
330
331#ifdef ACPI_HOTPLUG_OST
332 capbuf[OSC_SUPPORT_TYPE] |= OSC_SB_HOTPLUG_OST_SUPPORT;
333#endif
334
335 if (!ghes_disable)
336 capbuf[OSC_SUPPORT_TYPE] |= OSC_SB_APEI_SUPPORT;
337 if (ACPI_FAILURE(acpi_get_handle(NULL, "\\_SB", &handle)))
338 return;
339 if (ACPI_SUCCESS(acpi_run_osc(handle, &context))) {
340 u32 *capbuf_ret = context.ret.pointer;
341 if (context.ret.length > OSC_SUPPORT_TYPE)
342 osc_sb_apei_support_acked =
343 capbuf_ret[OSC_SUPPORT_TYPE] & OSC_SB_APEI_SUPPORT;
344 kfree(context.ret.pointer);
345 }
346
347}
348
349
350
351
352
353#ifdef CONFIG_ACPI_PROC_EVENT
354static DEFINE_SPINLOCK(acpi_bus_event_lock);
355
356LIST_HEAD(acpi_bus_event_list);
357DECLARE_WAIT_QUEUE_HEAD(acpi_bus_event_queue);
358
359extern int event_is_open;
360
361int acpi_bus_generate_proc_event4(const char *device_class, const char *bus_id, u8 type, int data)
362{
363 struct acpi_bus_event *event;
364 unsigned long flags = 0;
365
366
367 if (!event_is_open)
368 return 0;
369
370 event = kzalloc(sizeof(struct acpi_bus_event), GFP_ATOMIC);
371 if (!event)
372 return -ENOMEM;
373
374 strcpy(event->device_class, device_class);
375 strcpy(event->bus_id, bus_id);
376 event->type = type;
377 event->data = data;
378
379 spin_lock_irqsave(&acpi_bus_event_lock, flags);
380 list_add_tail(&event->node, &acpi_bus_event_list);
381 spin_unlock_irqrestore(&acpi_bus_event_lock, flags);
382
383 wake_up_interruptible(&acpi_bus_event_queue);
384
385 return 0;
386
387}
388
389EXPORT_SYMBOL_GPL(acpi_bus_generate_proc_event4);
390
391int acpi_bus_generate_proc_event(struct acpi_device *device, u8 type, int data)
392{
393 if (!device)
394 return -EINVAL;
395 return acpi_bus_generate_proc_event4(device->pnp.device_class,
396 device->pnp.bus_id, type, data);
397}
398
399EXPORT_SYMBOL(acpi_bus_generate_proc_event);
400
401int acpi_bus_receive_event(struct acpi_bus_event *event)
402{
403 unsigned long flags = 0;
404 struct acpi_bus_event *entry = NULL;
405
406 DECLARE_WAITQUEUE(wait, current);
407
408
409 if (!event)
410 return -EINVAL;
411
412 if (list_empty(&acpi_bus_event_list)) {
413
414 set_current_state(TASK_INTERRUPTIBLE);
415 add_wait_queue(&acpi_bus_event_queue, &wait);
416
417 if (list_empty(&acpi_bus_event_list))
418 schedule();
419
420 remove_wait_queue(&acpi_bus_event_queue, &wait);
421 set_current_state(TASK_RUNNING);
422
423 if (signal_pending(current))
424 return -ERESTARTSYS;
425 }
426
427 spin_lock_irqsave(&acpi_bus_event_lock, flags);
428 if (!list_empty(&acpi_bus_event_list)) {
429 entry = list_entry(acpi_bus_event_list.next,
430 struct acpi_bus_event, node);
431 list_del(&entry->node);
432 }
433 spin_unlock_irqrestore(&acpi_bus_event_lock, flags);
434
435 if (!entry)
436 return -ENODEV;
437
438 memcpy(event, entry, sizeof(struct acpi_bus_event));
439
440 kfree(entry);
441
442 return 0;
443}
444
445#endif
446
447
448
449
450
451static void acpi_bus_check_device(acpi_handle handle)
452{
453 struct acpi_device *device;
454 acpi_status status;
455 struct acpi_device_status old_status;
456
457 if (acpi_bus_get_device(handle, &device))
458 return;
459 if (!device)
460 return;
461
462 old_status = device->status;
463
464
465
466
467
468 if (device->parent && !device->parent->status.present) {
469 device->status = device->parent->status;
470 return;
471 }
472
473 status = acpi_bus_get_status(device);
474 if (ACPI_FAILURE(status))
475 return;
476
477 if (STRUCT_TO_INT(old_status) == STRUCT_TO_INT(device->status))
478 return;
479
480
481
482
483 if ((device->status.present) && !(old_status.present)) {
484 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device insertion detected\n"));
485
486 } else if (!(device->status.present) && (old_status.present)) {
487 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device removal detected\n"));
488
489 }
490}
491
492static void acpi_bus_check_scope(acpi_handle handle)
493{
494
495 acpi_bus_check_device(handle);
496
497
498
499
500
501}
502
503static BLOCKING_NOTIFIER_HEAD(acpi_bus_notify_list);
504int register_acpi_bus_notifier(struct notifier_block *nb)
505{
506 return blocking_notifier_chain_register(&acpi_bus_notify_list, nb);
507}
508EXPORT_SYMBOL_GPL(register_acpi_bus_notifier);
509
510void unregister_acpi_bus_notifier(struct notifier_block *nb)
511{
512 blocking_notifier_chain_unregister(&acpi_bus_notify_list, nb);
513}
514EXPORT_SYMBOL_GPL(unregister_acpi_bus_notifier);
515
516
517
518
519
520
521static void acpi_bus_notify(acpi_handle handle, u32 type, void *data)
522{
523 struct acpi_device *device = NULL;
524 struct acpi_driver *driver;
525
526 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Notification %#02x to handle %p\n",
527 type, handle));
528
529 blocking_notifier_call_chain(&acpi_bus_notify_list,
530 type, (void *)handle);
531
532 switch (type) {
533
534 case ACPI_NOTIFY_BUS_CHECK:
535 acpi_bus_check_scope(handle);
536
537
538
539
540 break;
541
542 case ACPI_NOTIFY_DEVICE_CHECK:
543 acpi_bus_check_device(handle);
544
545
546
547
548 break;
549
550 case ACPI_NOTIFY_DEVICE_WAKE:
551
552 break;
553
554 case ACPI_NOTIFY_EJECT_REQUEST:
555
556 break;
557
558 case ACPI_NOTIFY_DEVICE_CHECK_LIGHT:
559
560 break;
561
562 case ACPI_NOTIFY_FREQUENCY_MISMATCH:
563
564 break;
565
566 case ACPI_NOTIFY_BUS_MODE_MISMATCH:
567
568 break;
569
570 case ACPI_NOTIFY_POWER_FAULT:
571
572 break;
573
574 default:
575 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
576 "Received unknown/unsupported notification [%08x]\n",
577 type));
578 break;
579 }
580
581 acpi_bus_get_device(handle, &device);
582 if (device) {
583 driver = device->driver;
584 if (driver && driver->ops.notify &&
585 (driver->flags & ACPI_DRIVER_ALL_NOTIFY_EVENTS))
586 driver->ops.notify(device, type);
587 }
588}
589
590
591
592
593
594static int __init acpi_bus_init_irq(void)
595{
596 acpi_status status = AE_OK;
597 union acpi_object arg = { ACPI_TYPE_INTEGER };
598 struct acpi_object_list arg_list = { 1, &arg };
599 char *message = NULL;
600
601
602
603
604
605
606
607 switch (acpi_irq_model) {
608 case ACPI_IRQ_MODEL_PIC:
609 message = "PIC";
610 break;
611 case ACPI_IRQ_MODEL_IOAPIC:
612 message = "IOAPIC";
613 break;
614 case ACPI_IRQ_MODEL_IOSAPIC:
615 message = "IOSAPIC";
616 break;
617 case ACPI_IRQ_MODEL_PLATFORM:
618 message = "platform specific model";
619 break;
620 default:
621 printk(KERN_WARNING PREFIX "Unknown interrupt routing model\n");
622 return -ENODEV;
623 }
624
625 printk(KERN_INFO PREFIX "Using %s for interrupt routing\n", message);
626
627 arg.integer.value = acpi_irq_model;
628
629 status = acpi_evaluate_object(NULL, "\\_PIC", &arg_list, NULL);
630 if (ACPI_FAILURE(status) && (status != AE_NOT_FOUND)) {
631 ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PIC"));
632 return -ENODEV;
633 }
634
635 return 0;
636}
637
638u8 acpi_gbl_permanent_mmap;
639
640
641void __init acpi_early_init(void)
642{
643 acpi_status status = AE_OK;
644
645 if (acpi_disabled)
646 return;
647
648 printk(KERN_INFO PREFIX "Core revision %08x\n", ACPI_CA_VERSION);
649
650
651 if (!acpi_strict)
652 acpi_gbl_enable_interpreter_slack = TRUE;
653
654 acpi_gbl_permanent_mmap = 1;
655
656
657
658
659
660 dmi_check_system(dsdt_dmi_table);
661
662 status = acpi_reallocate_root_table();
663 if (ACPI_FAILURE(status)) {
664 printk(KERN_ERR PREFIX
665 "Unable to reallocate ACPI tables\n");
666 goto error0;
667 }
668
669 status = acpi_initialize_subsystem();
670 if (ACPI_FAILURE(status)) {
671 printk(KERN_ERR PREFIX
672 "Unable to initialize the ACPI Interpreter\n");
673 goto error0;
674 }
675
676 status = acpi_load_tables();
677 if (ACPI_FAILURE(status)) {
678 printk(KERN_ERR PREFIX
679 "Unable to load the System Description Tables\n");
680 goto error0;
681 }
682
683#ifdef CONFIG_X86
684 if (!acpi_ioapic) {
685
686 if (!(acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)) {
687 acpi_sci_flags &= ~ACPI_MADT_TRIGGER_MASK;
688 acpi_sci_flags |= ACPI_MADT_TRIGGER_LEVEL;
689 }
690
691 acpi_pic_sci_set_trigger(acpi_gbl_FADT.sci_interrupt,
692 (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2);
693 } else {
694
695
696
697
698 acpi_gbl_FADT.sci_interrupt = acpi_sci_override_gsi;
699 }
700#endif
701
702 status = acpi_enable_subsystem(~ACPI_NO_ACPI_ENABLE);
703 if (ACPI_FAILURE(status)) {
704 printk(KERN_ERR PREFIX "Unable to enable ACPI\n");
705 goto error0;
706 }
707
708 return;
709
710 error0:
711 disable_acpi();
712 return;
713}
714
715static int __init acpi_bus_init(void)
716{
717 int result = 0;
718 acpi_status status = AE_OK;
719 extern acpi_status acpi_os_initialize1(void);
720
721 acpi_os_initialize1();
722
723 status = acpi_enable_subsystem(ACPI_NO_ACPI_ENABLE);
724 if (ACPI_FAILURE(status)) {
725 printk(KERN_ERR PREFIX
726 "Unable to start the ACPI Interpreter\n");
727 goto error1;
728 }
729
730
731
732
733
734
735
736
737
738 status = acpi_ec_ecdt_probe();
739
740
741 status = acpi_initialize_objects(ACPI_FULL_INITIALIZATION);
742 if (ACPI_FAILURE(status)) {
743 printk(KERN_ERR PREFIX "Unable to initialize ACPI objects\n");
744 goto error1;
745 }
746
747
748
749
750
751 acpi_bus_osc_support();
752
753
754
755
756
757 acpi_sysfs_init();
758
759 acpi_early_processor_set_pdc();
760
761
762
763
764
765 acpi_boot_ec_enable();
766
767 printk(KERN_INFO PREFIX "Interpreter enabled\n");
768
769
770 acpi_sleep_init();
771
772
773
774
775 result = acpi_bus_init_irq();
776 if (result)
777 goto error1;
778
779
780
781
782 status =
783 acpi_install_notify_handler(ACPI_ROOT_OBJECT, ACPI_SYSTEM_NOTIFY,
784 &acpi_bus_notify, NULL);
785 if (ACPI_FAILURE(status)) {
786 printk(KERN_ERR PREFIX
787 "Unable to register for device notifications\n");
788 goto error1;
789 }
790
791
792
793
794 acpi_root_dir = proc_mkdir(ACPI_BUS_FILE_ROOT, NULL);
795
796 return 0;
797
798
799 error1:
800 acpi_terminate();
801 return -ENODEV;
802}
803
804struct kobject *acpi_kobj;
805EXPORT_SYMBOL_GPL(acpi_kobj);
806
807static int __init acpi_init(void)
808{
809 int result;
810
811 if (acpi_disabled) {
812 printk(KERN_INFO PREFIX "Interpreter disabled.\n");
813 return -ENODEV;
814 }
815
816 acpi_kobj = kobject_create_and_add("acpi", firmware_kobj);
817 if (!acpi_kobj) {
818 printk(KERN_WARNING "%s: kset create error\n", __func__);
819 acpi_kobj = NULL;
820 }
821
822 init_acpi_device_notify();
823 result = acpi_bus_init();
824 if (result) {
825 disable_acpi();
826 return result;
827 }
828
829 pci_mmcfg_late_init();
830 acpi_scan_init();
831 acpi_ec_init();
832 acpi_debugfs_init();
833 acpi_sleep_proc_init();
834 acpi_wakeup_device_init();
835 return 0;
836}
837
838subsys_initcall(acpi_init);
839
