2 * acpi_bus.c - ACPI Bus Driver ($Revision: 80 $)
4 * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
6 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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.
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.
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.
22 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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>
32 #include <linux/device.h>
33 #include <linux/proc_fs.h>
34 #include <linux/acpi.h>
35 #include <linux/slab.h>
37 #include <asm/mpspec.h>
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>
48 #define _COMPONENT ACPI_BUS_COMPONENT
49 ACPI_MODULE_NAME("bus");
51 struct acpi_device *acpi_root;
52 struct proc_dir_entry *acpi_root_dir;
53 EXPORT_SYMBOL(acpi_root_dir);
55 #define STRUCT_TO_INT(s) (*((int*)&s))
59 static int set_copy_dsdt(const struct dmi_system_id *id)
61 printk(KERN_NOTICE "%s detected - "
62 "force copy of DSDT to local memory\n", id->ident);
63 acpi_gbl_copy_dsdt_locally = 1;
67 static struct dmi_system_id dsdt_dmi_table[] __initdata = {
69 * Invoke DSDT corruption work-around on all Toshiba Satellite.
70 * https://bugzilla.kernel.org/show_bug.cgi?id=14679
73 .callback = set_copy_dsdt,
74 .ident = "TOSHIBA Satellite",
76 DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"),
77 DMI_MATCH(DMI_PRODUCT_NAME, "Satellite"),
83 static struct dmi_system_id dsdt_dmi_table[] __initdata = {
88 /* --------------------------------------------------------------------------
90 -------------------------------------------------------------------------- */
92 int acpi_bus_get_device(acpi_handle handle, struct acpi_device **device)
99 /* TBD: Support fixed-feature devices */
101 status = acpi_get_data(handle, acpi_bus_data_handler, (void **)device);
102 if (ACPI_FAILURE(status) || !*device) {
103 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No context for object [%p]\n",
111 EXPORT_SYMBOL(acpi_bus_get_device);
113 acpi_status acpi_bus_get_status_handle(acpi_handle handle,
114 unsigned long long *sta)
118 status = acpi_evaluate_integer(handle, "_STA", NULL, sta);
119 if (ACPI_SUCCESS(status))
122 if (status == AE_NOT_FOUND) {
123 *sta = ACPI_STA_DEVICE_PRESENT | ACPI_STA_DEVICE_ENABLED |
124 ACPI_STA_DEVICE_UI | ACPI_STA_DEVICE_FUNCTIONING;
130 int acpi_bus_get_status(struct acpi_device *device)
133 unsigned long long sta;
135 status = acpi_bus_get_status_handle(device->handle, &sta);
136 if (ACPI_FAILURE(status))
139 STRUCT_TO_INT(device->status) = (int) sta;
141 if (device->status.functional && !device->status.present) {
142 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] status [%08x]: "
143 "functional but not present;\n",
145 (u32) STRUCT_TO_INT(device->status)));
148 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] status [%08x]\n",
150 (u32) STRUCT_TO_INT(device->status)));
153 EXPORT_SYMBOL(acpi_bus_get_status);
155 void acpi_bus_private_data_handler(acpi_handle handle,
160 EXPORT_SYMBOL(acpi_bus_private_data_handler);
162 int acpi_bus_get_private_data(acpi_handle handle, void **data)
169 status = acpi_get_data(handle, acpi_bus_private_data_handler, data);
170 if (ACPI_FAILURE(status) || !*data) {
171 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No context for object [%p]\n",
178 EXPORT_SYMBOL(acpi_bus_get_private_data);
180 static void acpi_print_osc_error(acpi_handle handle,
181 struct acpi_osc_context *context, char *error)
183 struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER};
186 if (ACPI_FAILURE(acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer)))
187 printk(KERN_DEBUG "%s\n", error);
189 printk(KERN_DEBUG "%s:%s\n", (char *)buffer.pointer, error);
190 kfree(buffer.pointer);
192 printk(KERN_DEBUG"_OSC request data:");
193 for (i = 0; i < context->cap.length; i += sizeof(u32))
194 printk("%x ", *((u32 *)(context->cap.pointer + i)));
198 static acpi_status acpi_str_to_uuid(char *str, u8 *uuid)
201 static int opc_map_to_uuid[16] = {6, 4, 2, 0, 11, 9, 16, 14, 19, 21,
202 24, 26, 28, 30, 32, 34};
204 if (strlen(str) != 36)
205 return AE_BAD_PARAMETER;
206 for (i = 0; i < 36; i++) {
207 if (i == 8 || i == 13 || i == 18 || i == 23) {
209 return AE_BAD_PARAMETER;
210 } else if (!isxdigit(str[i]))
211 return AE_BAD_PARAMETER;
213 for (i = 0; i < 16; i++) {
214 uuid[i] = hex_to_bin(str[opc_map_to_uuid[i]]) << 4;
215 uuid[i] |= hex_to_bin(str[opc_map_to_uuid[i] + 1]);
220 acpi_status acpi_run_osc(acpi_handle handle, struct acpi_osc_context *context)
223 struct acpi_object_list input;
224 union acpi_object in_params[4];
225 union acpi_object *out_obj;
228 struct acpi_buffer output = {ACPI_ALLOCATE_BUFFER, NULL};
232 if (ACPI_FAILURE(acpi_str_to_uuid(context->uuid_str, uuid)))
234 context->ret.length = ACPI_ALLOCATE_BUFFER;
235 context->ret.pointer = NULL;
237 /* Setting up input parameters */
239 input.pointer = in_params;
240 in_params[0].type = ACPI_TYPE_BUFFER;
241 in_params[0].buffer.length = 16;
242 in_params[0].buffer.pointer = uuid;
243 in_params[1].type = ACPI_TYPE_INTEGER;
244 in_params[1].integer.value = context->rev;
245 in_params[2].type = ACPI_TYPE_INTEGER;
246 in_params[2].integer.value = context->cap.length/sizeof(u32);
247 in_params[3].type = ACPI_TYPE_BUFFER;
248 in_params[3].buffer.length = context->cap.length;
249 in_params[3].buffer.pointer = context->cap.pointer;
251 status = acpi_evaluate_object(handle, "_OSC", &input, &output);
252 if (ACPI_FAILURE(status))
256 return AE_NULL_OBJECT;
258 out_obj = output.pointer;
259 if (out_obj->type != ACPI_TYPE_BUFFER
260 || out_obj->buffer.length != context->cap.length) {
261 acpi_print_osc_error(handle, context,
262 "_OSC evaluation returned wrong type");
266 /* Need to ignore the bit0 in result code */
267 errors = *((u32 *)out_obj->buffer.pointer) & ~(1 << 0);
269 if (errors & OSC_REQUEST_ERROR)
270 acpi_print_osc_error(handle, context,
271 "_OSC request failed");
272 if (errors & OSC_INVALID_UUID_ERROR)
273 acpi_print_osc_error(handle, context,
274 "_OSC invalid UUID");
275 if (errors & OSC_INVALID_REVISION_ERROR)
276 acpi_print_osc_error(handle, context,
277 "_OSC invalid revision");
278 if (errors & OSC_CAPABILITIES_MASK_ERROR) {
279 if (((u32 *)context->cap.pointer)[OSC_QUERY_TYPE]
289 context->ret.length = out_obj->buffer.length;
290 context->ret.pointer = kmemdup(out_obj->buffer.pointer,
291 context->ret.length, GFP_KERNEL);
292 if (!context->ret.pointer) {
293 status = AE_NO_MEMORY;
299 kfree(output.pointer);
301 context->ret.pointer = NULL;
304 EXPORT_SYMBOL(acpi_run_osc);
306 bool osc_sb_apei_support_acked;
307 static u8 sb_uuid_str[] = "0811B06E-4A27-44F9-8D60-3CBBC22E7B48";
308 static void acpi_bus_osc_support(void)
311 struct acpi_osc_context context = {
312 .uuid_str = sb_uuid_str,
315 .cap.pointer = capbuf,
319 capbuf[OSC_QUERY_TYPE] = OSC_QUERY_ENABLE;
320 capbuf[OSC_SUPPORT_TYPE] = OSC_SB_PR3_SUPPORT; /* _PR3 is in use */
321 #if defined(CONFIG_ACPI_PROCESSOR_AGGREGATOR) ||\
322 defined(CONFIG_ACPI_PROCESSOR_AGGREGATOR_MODULE)
323 capbuf[OSC_SUPPORT_TYPE] |= OSC_SB_PAD_SUPPORT;
326 #if defined(CONFIG_ACPI_PROCESSOR) || defined(CONFIG_ACPI_PROCESSOR_MODULE)
327 capbuf[OSC_SUPPORT_TYPE] |= OSC_SB_PPC_OST_SUPPORT;
330 #ifdef ACPI_HOTPLUG_OST
331 capbuf[OSC_SUPPORT_TYPE] |= OSC_SB_HOTPLUG_OST_SUPPORT;
335 capbuf[OSC_SUPPORT_TYPE] |= OSC_SB_APEI_SUPPORT;
336 if (ACPI_FAILURE(acpi_get_handle(NULL, "\\_SB", &handle)))
338 if (ACPI_SUCCESS(acpi_run_osc(handle, &context))) {
339 u32 *capbuf_ret = context.ret.pointer;
340 if (context.ret.length > OSC_SUPPORT_TYPE)
341 osc_sb_apei_support_acked =
342 capbuf_ret[OSC_SUPPORT_TYPE] & OSC_SB_APEI_SUPPORT;
343 kfree(context.ret.pointer);
345 /* do we need to check other returned cap? Sounds no */
348 /* --------------------------------------------------------------------------
350 -------------------------------------------------------------------------- */
352 #ifdef CONFIG_ACPI_PROC_EVENT
353 static DEFINE_SPINLOCK(acpi_bus_event_lock);
355 LIST_HEAD(acpi_bus_event_list);
356 DECLARE_WAIT_QUEUE_HEAD(acpi_bus_event_queue);
358 extern int event_is_open;
360 int acpi_bus_generate_proc_event4(const char *device_class, const char *bus_id, u8 type, int data)
362 struct acpi_bus_event *event;
365 /* drop event on the floor if no one's listening */
369 event = kzalloc(sizeof(struct acpi_bus_event), GFP_ATOMIC);
373 strcpy(event->device_class, device_class);
374 strcpy(event->bus_id, bus_id);
378 spin_lock_irqsave(&acpi_bus_event_lock, flags);
379 list_add_tail(&event->node, &acpi_bus_event_list);
380 spin_unlock_irqrestore(&acpi_bus_event_lock, flags);
382 wake_up_interruptible(&acpi_bus_event_queue);
388 EXPORT_SYMBOL_GPL(acpi_bus_generate_proc_event4);
390 int acpi_bus_generate_proc_event(struct acpi_device *device, u8 type, int data)
394 return acpi_bus_generate_proc_event4(device->pnp.device_class,
395 device->pnp.bus_id, type, data);
398 EXPORT_SYMBOL(acpi_bus_generate_proc_event);
400 int acpi_bus_receive_event(struct acpi_bus_event *event)
403 struct acpi_bus_event *entry = NULL;
405 DECLARE_WAITQUEUE(wait, current);
411 if (list_empty(&acpi_bus_event_list)) {
413 set_current_state(TASK_INTERRUPTIBLE);
414 add_wait_queue(&acpi_bus_event_queue, &wait);
416 if (list_empty(&acpi_bus_event_list))
419 remove_wait_queue(&acpi_bus_event_queue, &wait);
420 set_current_state(TASK_RUNNING);
422 if (signal_pending(current))
426 spin_lock_irqsave(&acpi_bus_event_lock, flags);
427 if (!list_empty(&acpi_bus_event_list)) {
428 entry = list_entry(acpi_bus_event_list.next,
429 struct acpi_bus_event, node);
430 list_del(&entry->node);
432 spin_unlock_irqrestore(&acpi_bus_event_lock, flags);
437 memcpy(event, entry, sizeof(struct acpi_bus_event));
444 #endif /* CONFIG_ACPI_PROC_EVENT */
446 /* --------------------------------------------------------------------------
447 Notification Handling
448 -------------------------------------------------------------------------- */
450 static void acpi_bus_check_device(acpi_handle handle)
452 struct acpi_device *device;
454 struct acpi_device_status old_status;
456 if (acpi_bus_get_device(handle, &device))
461 old_status = device->status;
464 * Make sure this device's parent is present before we go about
465 * messing with the device.
467 if (device->parent && !device->parent->status.present) {
468 device->status = device->parent->status;
472 status = acpi_bus_get_status(device);
473 if (ACPI_FAILURE(status))
476 if (STRUCT_TO_INT(old_status) == STRUCT_TO_INT(device->status))
480 * Device Insertion/Removal
482 if ((device->status.present) && !(old_status.present)) {
483 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device insertion detected\n"));
484 /* TBD: Handle device insertion */
485 } else if (!(device->status.present) && (old_status.present)) {
486 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device removal detected\n"));
487 /* TBD: Handle device removal */
491 static void acpi_bus_check_scope(acpi_handle handle)
494 acpi_bus_check_device(handle);
497 * TBD: Enumerate child devices within this device's scope and
498 * run acpi_bus_check_device()'s on them.
505 * Callback for all 'system-level' device notifications (values 0x00-0x7F).
507 static void acpi_bus_notify(acpi_handle handle, u32 type, void *data)
509 struct acpi_device *device = NULL;
510 struct acpi_driver *driver;
512 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Notification %#02x to handle %p\n",
517 case ACPI_NOTIFY_BUS_CHECK:
518 acpi_bus_check_scope(handle);
520 * TBD: We'll need to outsource certain events to non-ACPI
521 * drivers via the device manager (device.c).
525 case ACPI_NOTIFY_DEVICE_CHECK:
526 acpi_bus_check_device(handle);
528 * TBD: We'll need to outsource certain events to non-ACPI
529 * drivers via the device manager (device.c).
533 case ACPI_NOTIFY_DEVICE_WAKE:
537 case ACPI_NOTIFY_EJECT_REQUEST:
541 case ACPI_NOTIFY_DEVICE_CHECK_LIGHT:
542 /* TBD: Exactly what does 'light' mean? */
545 case ACPI_NOTIFY_FREQUENCY_MISMATCH:
549 case ACPI_NOTIFY_BUS_MODE_MISMATCH:
553 case ACPI_NOTIFY_POWER_FAULT:
558 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
559 "Received unknown/unsupported notification [%08x]\n",
564 acpi_bus_get_device(handle, &device);
566 driver = device->driver;
567 if (driver && driver->ops.notify &&
568 (driver->flags & ACPI_DRIVER_ALL_NOTIFY_EVENTS))
569 driver->ops.notify(device, type);
573 /* --------------------------------------------------------------------------
574 Initialization/Cleanup
575 -------------------------------------------------------------------------- */
577 static int __init acpi_bus_init_irq(void)
580 char *message = NULL;
584 * Let the system know what interrupt model we are using by
585 * evaluating the \_PIC object, if exists.
588 switch (acpi_irq_model) {
589 case ACPI_IRQ_MODEL_PIC:
592 case ACPI_IRQ_MODEL_IOAPIC:
595 case ACPI_IRQ_MODEL_IOSAPIC:
598 case ACPI_IRQ_MODEL_PLATFORM:
599 message = "platform specific model";
602 printk(KERN_WARNING PREFIX "Unknown interrupt routing model\n");
606 printk(KERN_INFO PREFIX "Using %s for interrupt routing\n", message);
608 status = acpi_execute_simple_method(NULL, "\\_PIC", acpi_irq_model);
609 if (ACPI_FAILURE(status) && (status != AE_NOT_FOUND)) {
610 ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PIC"));
617 u8 acpi_gbl_permanent_mmap;
620 void __init acpi_early_init(void)
627 printk(KERN_INFO PREFIX "Core revision %08x\n", ACPI_CA_VERSION);
629 /* enable workarounds, unless strict ACPI spec. compliance */
631 acpi_gbl_enable_interpreter_slack = TRUE;
633 acpi_gbl_permanent_mmap = 1;
636 * If the machine falls into the DMI check table,
637 * DSDT will be copied to memory
639 dmi_check_system(dsdt_dmi_table);
641 status = acpi_reallocate_root_table();
642 if (ACPI_FAILURE(status)) {
643 printk(KERN_ERR PREFIX
644 "Unable to reallocate ACPI tables\n");
648 status = acpi_initialize_subsystem();
649 if (ACPI_FAILURE(status)) {
650 printk(KERN_ERR PREFIX
651 "Unable to initialize the ACPI Interpreter\n");
655 status = acpi_load_tables();
656 if (ACPI_FAILURE(status)) {
657 printk(KERN_ERR PREFIX
658 "Unable to load the System Description Tables\n");
664 /* compatible (0) means level (3) */
665 if (!(acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)) {
666 acpi_sci_flags &= ~ACPI_MADT_TRIGGER_MASK;
667 acpi_sci_flags |= ACPI_MADT_TRIGGER_LEVEL;
669 /* Set PIC-mode SCI trigger type */
670 acpi_pic_sci_set_trigger(acpi_gbl_FADT.sci_interrupt,
671 (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2);
674 * now that acpi_gbl_FADT is initialized,
675 * update it with result from INT_SRC_OVR parsing
677 acpi_gbl_FADT.sci_interrupt = acpi_sci_override_gsi;
681 status = acpi_enable_subsystem(~ACPI_NO_ACPI_ENABLE);
682 if (ACPI_FAILURE(status)) {
683 printk(KERN_ERR PREFIX "Unable to enable ACPI\n");
694 static int __init acpi_bus_init(void)
698 extern acpi_status acpi_os_initialize1(void);
700 acpi_os_initialize1();
702 status = acpi_enable_subsystem(ACPI_NO_ACPI_ENABLE);
703 if (ACPI_FAILURE(status)) {
704 printk(KERN_ERR PREFIX
705 "Unable to start the ACPI Interpreter\n");
710 * ACPI 2.0 requires the EC driver to be loaded and work before
711 * the EC device is found in the namespace (i.e. before acpi_initialize_objects()
714 * This is accomplished by looking for the ECDT table, and getting
715 * the EC parameters out of that.
717 status = acpi_ec_ecdt_probe();
718 /* Ignore result. Not having an ECDT is not fatal. */
720 status = acpi_initialize_objects(ACPI_FULL_INITIALIZATION);
721 if (ACPI_FAILURE(status)) {
722 printk(KERN_ERR PREFIX "Unable to initialize ACPI objects\n");
727 * _OSC method may exist in module level code,
728 * so it must be run after ACPI_FULL_INITIALIZATION
730 acpi_bus_osc_support();
733 * _PDC control method may load dynamic SSDT tables,
734 * and we need to install the table handler before that.
738 acpi_early_processor_set_pdc();
741 * Maybe EC region is required at bus_scan/acpi_get_devices. So it
742 * is necessary to enable it as early as possible.
744 acpi_boot_ec_enable();
746 printk(KERN_INFO PREFIX "Interpreter enabled\n");
748 /* Initialize sleep structures */
752 * Get the system interrupt model and evaluate \_PIC.
754 result = acpi_bus_init_irq();
759 * Register the for all standard device notifications.
762 acpi_install_notify_handler(ACPI_ROOT_OBJECT, ACPI_SYSTEM_NOTIFY,
763 &acpi_bus_notify, NULL);
764 if (ACPI_FAILURE(status)) {
765 printk(KERN_ERR PREFIX
766 "Unable to register for device notifications\n");
771 * Create the top ACPI proc directory
773 acpi_root_dir = proc_mkdir(ACPI_BUS_FILE_ROOT, NULL);
777 /* Mimic structured exception handling */
783 struct kobject *acpi_kobj;
784 EXPORT_SYMBOL_GPL(acpi_kobj);
786 static int __init acpi_init(void)
791 printk(KERN_INFO PREFIX "Interpreter disabled.\n");
795 acpi_kobj = kobject_create_and_add("acpi", firmware_kobj);
797 printk(KERN_WARNING "%s: kset create error\n", __func__);
801 init_acpi_device_notify();
802 result = acpi_bus_init();
808 pci_mmcfg_late_init();
812 acpi_sleep_proc_init();
813 acpi_wakeup_device_init();
817 subsys_initcall(acpi_init);