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 acpi_status acpi_bus_get_status_handle(acpi_handle handle,
93 unsigned long long *sta)
97 status = acpi_evaluate_integer(handle, "_STA", NULL, sta);
98 if (ACPI_SUCCESS(status))
101 if (status == AE_NOT_FOUND) {
102 *sta = ACPI_STA_DEVICE_PRESENT | ACPI_STA_DEVICE_ENABLED |
103 ACPI_STA_DEVICE_UI | ACPI_STA_DEVICE_FUNCTIONING;
109 int acpi_bus_get_status(struct acpi_device *device)
112 unsigned long long sta;
114 status = acpi_bus_get_status_handle(device->handle, &sta);
115 if (ACPI_FAILURE(status))
118 STRUCT_TO_INT(device->status) = (int) sta;
120 if (device->status.functional && !device->status.present) {
121 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] status [%08x]: "
122 "functional but not present;\n",
124 (u32) STRUCT_TO_INT(device->status)));
127 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] status [%08x]\n",
129 (u32) STRUCT_TO_INT(device->status)));
132 EXPORT_SYMBOL(acpi_bus_get_status);
134 void acpi_bus_private_data_handler(acpi_handle handle,
139 EXPORT_SYMBOL(acpi_bus_private_data_handler);
141 int acpi_bus_get_private_data(acpi_handle handle, void **data)
148 status = acpi_get_data(handle, acpi_bus_private_data_handler, data);
149 if (ACPI_FAILURE(status) || !*data) {
150 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No context for object [%p]\n",
157 EXPORT_SYMBOL(acpi_bus_get_private_data);
159 void acpi_bus_no_hotplug(acpi_handle handle)
161 struct acpi_device *adev = NULL;
163 acpi_bus_get_device(handle, &adev);
165 adev->flags.no_hotplug = true;
167 EXPORT_SYMBOL_GPL(acpi_bus_no_hotplug);
169 static void acpi_print_osc_error(acpi_handle handle,
170 struct acpi_osc_context *context, char *error)
172 struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER};
175 if (ACPI_FAILURE(acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer)))
176 printk(KERN_DEBUG "%s\n", error);
178 printk(KERN_DEBUG "%s:%s\n", (char *)buffer.pointer, error);
179 kfree(buffer.pointer);
181 printk(KERN_DEBUG"_OSC request data:");
182 for (i = 0; i < context->cap.length; i += sizeof(u32))
183 printk("%x ", *((u32 *)(context->cap.pointer + i)));
187 acpi_status acpi_str_to_uuid(char *str, u8 *uuid)
190 static int opc_map_to_uuid[16] = {6, 4, 2, 0, 11, 9, 16, 14, 19, 21,
191 24, 26, 28, 30, 32, 34};
193 if (strlen(str) != 36)
194 return AE_BAD_PARAMETER;
195 for (i = 0; i < 36; i++) {
196 if (i == 8 || i == 13 || i == 18 || i == 23) {
198 return AE_BAD_PARAMETER;
199 } else if (!isxdigit(str[i]))
200 return AE_BAD_PARAMETER;
202 for (i = 0; i < 16; i++) {
203 uuid[i] = hex_to_bin(str[opc_map_to_uuid[i]]) << 4;
204 uuid[i] |= hex_to_bin(str[opc_map_to_uuid[i] + 1]);
208 EXPORT_SYMBOL_GPL(acpi_str_to_uuid);
210 acpi_status acpi_run_osc(acpi_handle handle, struct acpi_osc_context *context)
213 struct acpi_object_list input;
214 union acpi_object in_params[4];
215 union acpi_object *out_obj;
218 struct acpi_buffer output = {ACPI_ALLOCATE_BUFFER, NULL};
222 if (ACPI_FAILURE(acpi_str_to_uuid(context->uuid_str, uuid)))
224 context->ret.length = ACPI_ALLOCATE_BUFFER;
225 context->ret.pointer = NULL;
227 /* Setting up input parameters */
229 input.pointer = in_params;
230 in_params[0].type = ACPI_TYPE_BUFFER;
231 in_params[0].buffer.length = 16;
232 in_params[0].buffer.pointer = uuid;
233 in_params[1].type = ACPI_TYPE_INTEGER;
234 in_params[1].integer.value = context->rev;
235 in_params[2].type = ACPI_TYPE_INTEGER;
236 in_params[2].integer.value = context->cap.length/sizeof(u32);
237 in_params[3].type = ACPI_TYPE_BUFFER;
238 in_params[3].buffer.length = context->cap.length;
239 in_params[3].buffer.pointer = context->cap.pointer;
241 status = acpi_evaluate_object(handle, "_OSC", &input, &output);
242 if (ACPI_FAILURE(status))
246 return AE_NULL_OBJECT;
248 out_obj = output.pointer;
249 if (out_obj->type != ACPI_TYPE_BUFFER
250 || out_obj->buffer.length != context->cap.length) {
251 acpi_print_osc_error(handle, context,
252 "_OSC evaluation returned wrong type");
256 /* Need to ignore the bit0 in result code */
257 errors = *((u32 *)out_obj->buffer.pointer) & ~(1 << 0);
259 if (errors & OSC_REQUEST_ERROR)
260 acpi_print_osc_error(handle, context,
261 "_OSC request failed");
262 if (errors & OSC_INVALID_UUID_ERROR)
263 acpi_print_osc_error(handle, context,
264 "_OSC invalid UUID");
265 if (errors & OSC_INVALID_REVISION_ERROR)
266 acpi_print_osc_error(handle, context,
267 "_OSC invalid revision");
268 if (errors & OSC_CAPABILITIES_MASK_ERROR) {
269 if (((u32 *)context->cap.pointer)[OSC_QUERY_DWORD]
279 context->ret.length = out_obj->buffer.length;
280 context->ret.pointer = kmemdup(out_obj->buffer.pointer,
281 context->ret.length, GFP_KERNEL);
282 if (!context->ret.pointer) {
283 status = AE_NO_MEMORY;
289 kfree(output.pointer);
291 context->ret.pointer = NULL;
294 EXPORT_SYMBOL(acpi_run_osc);
296 bool osc_sb_apei_support_acked;
297 static u8 sb_uuid_str[] = "0811B06E-4A27-44F9-8D60-3CBBC22E7B48";
298 static void acpi_bus_osc_support(void)
301 struct acpi_osc_context context = {
302 .uuid_str = sb_uuid_str,
305 .cap.pointer = capbuf,
309 capbuf[OSC_QUERY_DWORD] = OSC_QUERY_ENABLE;
310 capbuf[OSC_SUPPORT_DWORD] = OSC_SB_PR3_SUPPORT; /* _PR3 is in use */
311 #if defined(CONFIG_ACPI_PROCESSOR_AGGREGATOR) ||\
312 defined(CONFIG_ACPI_PROCESSOR_AGGREGATOR_MODULE)
313 capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_PAD_SUPPORT;
316 #if defined(CONFIG_ACPI_PROCESSOR) || defined(CONFIG_ACPI_PROCESSOR_MODULE)
317 capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_PPC_OST_SUPPORT;
320 #ifdef ACPI_HOTPLUG_OST
321 capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_HOTPLUG_OST_SUPPORT;
325 capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_APEI_SUPPORT;
326 if (ACPI_FAILURE(acpi_get_handle(NULL, "\\_SB", &handle)))
328 if (ACPI_SUCCESS(acpi_run_osc(handle, &context))) {
329 u32 *capbuf_ret = context.ret.pointer;
330 if (context.ret.length > OSC_SUPPORT_DWORD)
331 osc_sb_apei_support_acked =
332 capbuf_ret[OSC_SUPPORT_DWORD] & OSC_SB_APEI_SUPPORT;
333 kfree(context.ret.pointer);
335 /* do we need to check other returned cap? Sounds no */
338 /* --------------------------------------------------------------------------
339 Notification Handling
340 -------------------------------------------------------------------------- */
342 static void acpi_bus_check_device(acpi_handle handle)
344 struct acpi_device *device;
346 struct acpi_device_status old_status;
348 if (acpi_bus_get_device(handle, &device))
353 old_status = device->status;
356 * Make sure this device's parent is present before we go about
357 * messing with the device.
359 if (device->parent && !device->parent->status.present) {
360 device->status = device->parent->status;
364 status = acpi_bus_get_status(device);
365 if (ACPI_FAILURE(status))
368 if (STRUCT_TO_INT(old_status) == STRUCT_TO_INT(device->status))
372 * Device Insertion/Removal
374 if ((device->status.present) && !(old_status.present)) {
375 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device insertion detected\n"));
376 /* TBD: Handle device insertion */
377 } else if (!(device->status.present) && (old_status.present)) {
378 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device removal detected\n"));
379 /* TBD: Handle device removal */
383 static void acpi_bus_check_scope(acpi_handle handle)
386 acpi_bus_check_device(handle);
389 * TBD: Enumerate child devices within this device's scope and
390 * run acpi_bus_check_device()'s on them.
397 * Callback for all 'system-level' device notifications (values 0x00-0x7F).
399 static void acpi_bus_notify(acpi_handle handle, u32 type, void *data)
401 struct acpi_device *device = NULL;
402 struct acpi_driver *driver;
404 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Notification %#02x to handle %p\n",
409 case ACPI_NOTIFY_BUS_CHECK:
410 acpi_bus_check_scope(handle);
412 * TBD: We'll need to outsource certain events to non-ACPI
413 * drivers via the device manager (device.c).
417 case ACPI_NOTIFY_DEVICE_CHECK:
418 acpi_bus_check_device(handle);
420 * TBD: We'll need to outsource certain events to non-ACPI
421 * drivers via the device manager (device.c).
425 case ACPI_NOTIFY_DEVICE_WAKE:
429 case ACPI_NOTIFY_EJECT_REQUEST:
433 case ACPI_NOTIFY_DEVICE_CHECK_LIGHT:
434 /* TBD: Exactly what does 'light' mean? */
437 case ACPI_NOTIFY_FREQUENCY_MISMATCH:
441 case ACPI_NOTIFY_BUS_MODE_MISMATCH:
445 case ACPI_NOTIFY_POWER_FAULT:
450 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
451 "Received unknown/unsupported notification [%08x]\n",
456 acpi_bus_get_device(handle, &device);
458 driver = device->driver;
459 if (driver && driver->ops.notify &&
460 (driver->flags & ACPI_DRIVER_ALL_NOTIFY_EVENTS))
461 driver->ops.notify(device, type);
465 /* --------------------------------------------------------------------------
466 Initialization/Cleanup
467 -------------------------------------------------------------------------- */
469 static int __init acpi_bus_init_irq(void)
472 char *message = NULL;
476 * Let the system know what interrupt model we are using by
477 * evaluating the \_PIC object, if exists.
480 switch (acpi_irq_model) {
481 case ACPI_IRQ_MODEL_PIC:
484 case ACPI_IRQ_MODEL_IOAPIC:
487 case ACPI_IRQ_MODEL_IOSAPIC:
490 case ACPI_IRQ_MODEL_PLATFORM:
491 message = "platform specific model";
494 printk(KERN_WARNING PREFIX "Unknown interrupt routing model\n");
498 printk(KERN_INFO PREFIX "Using %s for interrupt routing\n", message);
500 status = acpi_execute_simple_method(NULL, "\\_PIC", acpi_irq_model);
501 if (ACPI_FAILURE(status) && (status != AE_NOT_FOUND)) {
502 ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PIC"));
509 u8 acpi_gbl_permanent_mmap;
512 void __init acpi_early_init(void)
519 printk(KERN_INFO PREFIX "Core revision %08x\n", ACPI_CA_VERSION);
521 /* enable workarounds, unless strict ACPI spec. compliance */
523 acpi_gbl_enable_interpreter_slack = TRUE;
525 acpi_gbl_permanent_mmap = 1;
528 * If the machine falls into the DMI check table,
529 * DSDT will be copied to memory
531 dmi_check_system(dsdt_dmi_table);
533 status = acpi_reallocate_root_table();
534 if (ACPI_FAILURE(status)) {
535 printk(KERN_ERR PREFIX
536 "Unable to reallocate ACPI tables\n");
540 status = acpi_initialize_subsystem();
541 if (ACPI_FAILURE(status)) {
542 printk(KERN_ERR PREFIX
543 "Unable to initialize the ACPI Interpreter\n");
547 status = acpi_load_tables();
548 if (ACPI_FAILURE(status)) {
549 printk(KERN_ERR PREFIX
550 "Unable to load the System Description Tables\n");
556 /* compatible (0) means level (3) */
557 if (!(acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)) {
558 acpi_sci_flags &= ~ACPI_MADT_TRIGGER_MASK;
559 acpi_sci_flags |= ACPI_MADT_TRIGGER_LEVEL;
561 /* Set PIC-mode SCI trigger type */
562 acpi_pic_sci_set_trigger(acpi_gbl_FADT.sci_interrupt,
563 (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2);
566 * now that acpi_gbl_FADT is initialized,
567 * update it with result from INT_SRC_OVR parsing
569 acpi_gbl_FADT.sci_interrupt = acpi_sci_override_gsi;
573 status = acpi_enable_subsystem(~ACPI_NO_ACPI_ENABLE);
574 if (ACPI_FAILURE(status)) {
575 printk(KERN_ERR PREFIX "Unable to enable ACPI\n");
586 static int __init acpi_bus_init(void)
591 acpi_os_initialize1();
593 status = acpi_enable_subsystem(ACPI_NO_ACPI_ENABLE);
594 if (ACPI_FAILURE(status)) {
595 printk(KERN_ERR PREFIX
596 "Unable to start the ACPI Interpreter\n");
601 * ACPI 2.0 requires the EC driver to be loaded and work before
602 * the EC device is found in the namespace (i.e. before acpi_initialize_objects()
605 * This is accomplished by looking for the ECDT table, and getting
606 * the EC parameters out of that.
608 status = acpi_ec_ecdt_probe();
609 /* Ignore result. Not having an ECDT is not fatal. */
611 status = acpi_initialize_objects(ACPI_FULL_INITIALIZATION);
612 if (ACPI_FAILURE(status)) {
613 printk(KERN_ERR PREFIX "Unable to initialize ACPI objects\n");
618 * _OSC method may exist in module level code,
619 * so it must be run after ACPI_FULL_INITIALIZATION
621 acpi_bus_osc_support();
624 * _PDC control method may load dynamic SSDT tables,
625 * and we need to install the table handler before that.
629 acpi_early_processor_set_pdc();
632 * Maybe EC region is required at bus_scan/acpi_get_devices. So it
633 * is necessary to enable it as early as possible.
635 acpi_boot_ec_enable();
637 printk(KERN_INFO PREFIX "Interpreter enabled\n");
639 /* Initialize sleep structures */
643 * Get the system interrupt model and evaluate \_PIC.
645 result = acpi_bus_init_irq();
650 * Register the for all standard device notifications.
653 acpi_install_notify_handler(ACPI_ROOT_OBJECT, ACPI_SYSTEM_NOTIFY,
654 &acpi_bus_notify, NULL);
655 if (ACPI_FAILURE(status)) {
656 printk(KERN_ERR PREFIX
657 "Unable to register for device notifications\n");
662 * Create the top ACPI proc directory
664 acpi_root_dir = proc_mkdir(ACPI_BUS_FILE_ROOT, NULL);
668 /* Mimic structured exception handling */
674 struct kobject *acpi_kobj;
675 EXPORT_SYMBOL_GPL(acpi_kobj);
677 static int __init acpi_init(void)
682 printk(KERN_INFO PREFIX "Interpreter disabled.\n");
686 acpi_kobj = kobject_create_and_add("acpi", firmware_kobj);
688 printk(KERN_WARNING "%s: kset create error\n", __func__);
692 init_acpi_device_notify();
693 result = acpi_bus_init();
699 pci_mmcfg_late_init();
703 acpi_sleep_proc_init();
704 acpi_wakeup_device_init();
708 subsys_initcall(acpi_init);