/* * acpi_bus.c - ACPI Bus Driver ($Revision: 80 $) * * Copyright (C) 2001, 2002 Paul Diefenbaugh * * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or (at * your option) any later version. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU General Public License along * with this program; if not, write to the Free Software Foundation, Inc., * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. * * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */ #include #include #include #include #include #include #include #include #include #include #include #include #ifdef CONFIG_X86 #include #endif #include #include #include #include #include "internal.h" #define _COMPONENT ACPI_BUS_COMPONENT ACPI_MODULE_NAME("bus"); struct acpi_device *acpi_root; struct proc_dir_entry *acpi_root_dir; EXPORT_SYMBOL(acpi_root_dir); #ifdef CONFIG_X86 static int set_copy_dsdt(const struct dmi_system_id *id) { printk(KERN_NOTICE "%s detected - " "force copy of DSDT to local memory\n", id->ident); acpi_gbl_copy_dsdt_locally = 1; return 0; } static struct dmi_system_id dsdt_dmi_table[] __initdata = { /* * Invoke DSDT corruption work-around on all Toshiba Satellite. * https://bugzilla.kernel.org/show_bug.cgi?id=14679 */ { .callback = set_copy_dsdt, .ident = "TOSHIBA Satellite", .matches = { DMI_MATCH(DMI_SYS_VENDOR, "TOSHIBA"), DMI_MATCH(DMI_PRODUCT_NAME, "Satellite"), }, }, {} }; #else static struct dmi_system_id dsdt_dmi_table[] __initdata = { {} }; #endif /* -------------------------------------------------------------------------- Device Management -------------------------------------------------------------------------- */ acpi_status acpi_bus_get_status_handle(acpi_handle handle, unsigned long long *sta) { acpi_status status; status = acpi_evaluate_integer(handle, "_STA", NULL, sta); if (ACPI_SUCCESS(status)) return AE_OK; if (status == AE_NOT_FOUND) { *sta = ACPI_STA_DEVICE_PRESENT | ACPI_STA_DEVICE_ENABLED | ACPI_STA_DEVICE_UI | ACPI_STA_DEVICE_FUNCTIONING; return AE_OK; } return status; } int acpi_bus_get_status(struct acpi_device *device) { acpi_status status; unsigned long long sta; status = acpi_bus_get_status_handle(device->handle, &sta); if (ACPI_FAILURE(status)) return -ENODEV; acpi_set_device_status(device, sta); if (device->status.functional && !device->status.present) { ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] status [%08x]: " "functional but not present;\n", device->pnp.bus_id, (u32)sta)); } ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Device [%s] status [%08x]\n", device->pnp.bus_id, (u32)sta)); return 0; } EXPORT_SYMBOL(acpi_bus_get_status); void acpi_bus_private_data_handler(acpi_handle handle, void *context) { return; } EXPORT_SYMBOL(acpi_bus_private_data_handler); int acpi_bus_attach_private_data(acpi_handle handle, void *data) { acpi_status status; status = acpi_attach_data(handle, acpi_bus_private_data_handler, data); if (ACPI_FAILURE(status)) { acpi_handle_debug(handle, "Error attaching device data\n"); return -ENODEV; } return 0; } EXPORT_SYMBOL_GPL(acpi_bus_attach_private_data); int acpi_bus_get_private_data(acpi_handle handle, void **data) { acpi_status status; if (!*data) return -EINVAL; status = acpi_get_data(handle, acpi_bus_private_data_handler, data); if (ACPI_FAILURE(status)) { acpi_handle_debug(handle, "No context for object\n"); return -ENODEV; } return 0; } EXPORT_SYMBOL_GPL(acpi_bus_get_private_data); void acpi_bus_detach_private_data(acpi_handle handle) { acpi_detach_data(handle, acpi_bus_private_data_handler); } EXPORT_SYMBOL_GPL(acpi_bus_detach_private_data); void acpi_bus_no_hotplug(acpi_handle handle) { struct acpi_device *adev = NULL; acpi_bus_get_device(handle, &adev); if (adev) adev->flags.no_hotplug = true; } EXPORT_SYMBOL_GPL(acpi_bus_no_hotplug); static void acpi_print_osc_error(acpi_handle handle, struct acpi_osc_context *context, char *error) { struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER}; int i; if (ACPI_FAILURE(acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer))) printk(KERN_DEBUG "%s\n", error); else { printk(KERN_DEBUG "%s:%s\n", (char *)buffer.pointer, error); kfree(buffer.pointer); } printk(KERN_DEBUG"_OSC request data:"); for (i = 0; i < context->cap.length; i += sizeof(u32)) printk("%x ", *((u32 *)(context->cap.pointer + i))); printk("\n"); } acpi_status acpi_str_to_uuid(char *str, u8 *uuid) { int i; static int opc_map_to_uuid[16] = {6, 4, 2, 0, 11, 9, 16, 14, 19, 21, 24, 26, 28, 30, 32, 34}; if (strlen(str) != 36) return AE_BAD_PARAMETER; for (i = 0; i < 36; i++) { if (i == 8 || i == 13 || i == 18 || i == 23) { if (str[i] != '-') return AE_BAD_PARAMETER; } else if (!isxdigit(str[i])) return AE_BAD_PARAMETER; } for (i = 0; i < 16; i++) { uuid[i] = hex_to_bin(str[opc_map_to_uuid[i]]) << 4; uuid[i] |= hex_to_bin(str[opc_map_to_uuid[i] + 1]); } return AE_OK; } EXPORT_SYMBOL_GPL(acpi_str_to_uuid); acpi_status acpi_run_osc(acpi_handle handle, struct acpi_osc_context *context) { acpi_status status; struct acpi_object_list input; union acpi_object in_params[4]; union acpi_object *out_obj; u8 uuid[16]; u32 errors; struct acpi_buffer output = {ACPI_ALLOCATE_BUFFER, NULL}; if (!context) return AE_ERROR; if (ACPI_FAILURE(acpi_str_to_uuid(context->uuid_str, uuid))) return AE_ERROR; context->ret.length = ACPI_ALLOCATE_BUFFER; context->ret.pointer = NULL; /* Setting up input parameters */ input.count = 4; input.pointer = in_params; in_params[0].type = ACPI_TYPE_BUFFER; in_params[0].buffer.length = 16; in_params[0].buffer.pointer = uuid; in_params[1].type = ACPI_TYPE_INTEGER; in_params[1].integer.value = context->rev; in_params[2].type = ACPI_TYPE_INTEGER; in_params[2].integer.value = context->cap.length/sizeof(u32); in_params[3].type = ACPI_TYPE_BUFFER; in_params[3].buffer.length = context->cap.length; in_params[3].buffer.pointer = context->cap.pointer; status = acpi_evaluate_object(handle, "_OSC", &input, &output); if (ACPI_FAILURE(status)) return status; if (!output.length) return AE_NULL_OBJECT; out_obj = output.pointer; if (out_obj->type != ACPI_TYPE_BUFFER || out_obj->buffer.length != context->cap.length) { acpi_print_osc_error(handle, context, "_OSC evaluation returned wrong type"); status = AE_TYPE; goto out_kfree; } /* Need to ignore the bit0 in result code */ errors = *((u32 *)out_obj->buffer.pointer) & ~(1 << 0); if (errors) { if (errors & OSC_REQUEST_ERROR) acpi_print_osc_error(handle, context, "_OSC request failed"); if (errors & OSC_INVALID_UUID_ERROR) acpi_print_osc_error(handle, context, "_OSC invalid UUID"); if (errors & OSC_INVALID_REVISION_ERROR) acpi_print_osc_error(handle, context, "_OSC invalid revision"); if (errors & OSC_CAPABILITIES_MASK_ERROR) { if (((u32 *)context->cap.pointer)[OSC_QUERY_DWORD] & OSC_QUERY_ENABLE) goto out_success; status = AE_SUPPORT; goto out_kfree; } status = AE_ERROR; goto out_kfree; } out_success: context->ret.length = out_obj->buffer.length; context->ret.pointer = kmemdup(out_obj->buffer.pointer, context->ret.length, GFP_KERNEL); if (!context->ret.pointer) { status = AE_NO_MEMORY; goto out_kfree; } status = AE_OK; out_kfree: kfree(output.pointer); if (status != AE_OK) context->ret.pointer = NULL; return status; } EXPORT_SYMBOL(acpi_run_osc); bool osc_sb_apei_support_acked; static u8 sb_uuid_str[] = "0811B06E-4A27-44F9-8D60-3CBBC22E7B48"; static void acpi_bus_osc_support(void) { u32 capbuf[2]; struct acpi_osc_context context = { .uuid_str = sb_uuid_str, .rev = 1, .cap.length = 8, .cap.pointer = capbuf, }; acpi_handle handle; capbuf[OSC_QUERY_DWORD] = OSC_QUERY_ENABLE; capbuf[OSC_SUPPORT_DWORD] = OSC_SB_PR3_SUPPORT; /* _PR3 is in use */ #if defined(CONFIG_ACPI_PROCESSOR_AGGREGATOR) ||\ defined(CONFIG_ACPI_PROCESSOR_AGGREGATOR_MODULE) capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_PAD_SUPPORT; #endif #if defined(CONFIG_ACPI_PROCESSOR) || defined(CONFIG_ACPI_PROCESSOR_MODULE) capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_PPC_OST_SUPPORT; #endif capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_HOTPLUG_OST_SUPPORT; if (!ghes_disable) capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_APEI_SUPPORT; if (ACPI_FAILURE(acpi_get_handle(NULL, "\\_SB", &handle))) return; if (ACPI_SUCCESS(acpi_run_osc(handle, &context))) { u32 *capbuf_ret = context.ret.pointer; if (context.ret.length > OSC_SUPPORT_DWORD) osc_sb_apei_support_acked = capbuf_ret[OSC_SUPPORT_DWORD] & OSC_SB_APEI_SUPPORT; kfree(context.ret.pointer); } /* do we need to check other returned cap? Sounds no */ } /* -------------------------------------------------------------------------- Notification Handling -------------------------------------------------------------------------- */ /** * acpi_bus_notify * --------------- * Callback for all 'system-level' device notifications (values 0x00-0x7F). */ static void acpi_bus_notify(acpi_handle handle, u32 type, void *data) { struct acpi_device *adev; struct acpi_driver *driver; acpi_status status; u32 ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE; switch (type) { case ACPI_NOTIFY_BUS_CHECK: acpi_handle_debug(handle, "ACPI_NOTIFY_BUS_CHECK event\n"); break; case ACPI_NOTIFY_DEVICE_CHECK: acpi_handle_debug(handle, "ACPI_NOTIFY_DEVICE_CHECK event\n"); break; case ACPI_NOTIFY_DEVICE_WAKE: acpi_handle_debug(handle, "ACPI_NOTIFY_DEVICE_WAKE event\n"); break; case ACPI_NOTIFY_EJECT_REQUEST: acpi_handle_debug(handle, "ACPI_NOTIFY_EJECT_REQUEST event\n"); break; case ACPI_NOTIFY_DEVICE_CHECK_LIGHT: acpi_handle_debug(handle, "ACPI_NOTIFY_DEVICE_CHECK_LIGHT event\n"); /* TBD: Exactly what does 'light' mean? */ break; case ACPI_NOTIFY_FREQUENCY_MISMATCH: acpi_handle_err(handle, "Device cannot be configured due " "to a frequency mismatch\n"); break; case ACPI_NOTIFY_BUS_MODE_MISMATCH: acpi_handle_err(handle, "Device cannot be configured due " "to a bus mode mismatch\n"); break; case ACPI_NOTIFY_POWER_FAULT: acpi_handle_err(handle, "Device has suffered a power fault\n"); break; default: acpi_handle_debug(handle, "Unknown event type 0x%x\n", type); break; } adev = acpi_bus_get_acpi_device(handle); if (!adev) goto err; driver = adev->driver; if (driver && driver->ops.notify && (driver->flags & ACPI_DRIVER_ALL_NOTIFY_EVENTS)) driver->ops.notify(adev, type); switch (type) { case ACPI_NOTIFY_BUS_CHECK: case ACPI_NOTIFY_DEVICE_CHECK: case ACPI_NOTIFY_EJECT_REQUEST: status = acpi_hotplug_schedule(adev, type); if (ACPI_SUCCESS(status)) return; default: break; } acpi_bus_put_acpi_device(adev); return; err: acpi_evaluate_ost(handle, type, ost_code, NULL); } /* -------------------------------------------------------------------------- Initialization/Cleanup -------------------------------------------------------------------------- */ static int __init acpi_bus_init_irq(void) { acpi_status status; char *message = NULL; /* * Let the system know what interrupt model we are using by * evaluating the \_PIC object, if exists. */ switch (acpi_irq_model) { case ACPI_IRQ_MODEL_PIC: message = "PIC"; break; case ACPI_IRQ_MODEL_IOAPIC: message = "IOAPIC"; break; case ACPI_IRQ_MODEL_IOSAPIC: message = "IOSAPIC"; break; case ACPI_IRQ_MODEL_PLATFORM: message = "platform specific model"; break; default: printk(KERN_WARNING PREFIX "Unknown interrupt routing model\n"); return -ENODEV; } printk(KERN_INFO PREFIX "Using %s for interrupt routing\n", message); status = acpi_execute_simple_method(NULL, "\\_PIC", acpi_irq_model); if (ACPI_FAILURE(status) && (status != AE_NOT_FOUND)) { ACPI_EXCEPTION((AE_INFO, status, "Evaluating _PIC")); return -ENODEV; } return 0; } u8 acpi_gbl_permanent_mmap; void __init acpi_early_init(void) { acpi_status status; if (acpi_disabled) return; printk(KERN_INFO PREFIX "Core revision %08x\n", ACPI_CA_VERSION); /* enable workarounds, unless strict ACPI spec. compliance */ if (!acpi_strict) acpi_gbl_enable_interpreter_slack = TRUE; acpi_gbl_permanent_mmap = 1; /* * If the machine falls into the DMI check table, * DSDT will be copied to memory */ dmi_check_system(dsdt_dmi_table); status = acpi_reallocate_root_table(); if (ACPI_FAILURE(status)) { printk(KERN_ERR PREFIX "Unable to reallocate ACPI tables\n"); goto error0; } status = acpi_initialize_subsystem(); if (ACPI_FAILURE(status)) { printk(KERN_ERR PREFIX "Unable to initialize the ACPI Interpreter\n"); goto error0; } status = acpi_load_tables(); if (ACPI_FAILURE(status)) { printk(KERN_ERR PREFIX "Unable to load the System Description Tables\n"); goto error0; } #ifdef CONFIG_X86 if (!acpi_ioapic) { /* compatible (0) means level (3) */ if (!(acpi_sci_flags & ACPI_MADT_TRIGGER_MASK)) { acpi_sci_flags &= ~ACPI_MADT_TRIGGER_MASK; acpi_sci_flags |= ACPI_MADT_TRIGGER_LEVEL; } /* Set PIC-mode SCI trigger type */ acpi_pic_sci_set_trigger(acpi_gbl_FADT.sci_interrupt, (acpi_sci_flags & ACPI_MADT_TRIGGER_MASK) >> 2); } else { /* * now that acpi_gbl_FADT is initialized, * update it with result from INT_SRC_OVR parsing */ acpi_gbl_FADT.sci_interrupt = acpi_sci_override_gsi; } #endif status = acpi_enable_subsystem(~ACPI_NO_ACPI_ENABLE); if (ACPI_FAILURE(status)) { printk(KERN_ERR PREFIX "Unable to enable ACPI\n"); goto error0; } /* * If the system is using ACPI then we can be reasonably * confident that any regulators are managed by the firmware * so tell the regulator core it has everything it needs to * know. */ regulator_has_full_constraints(); return; error0: disable_acpi(); return; } static int __init acpi_bus_init(void) { int result; acpi_status status; acpi_os_initialize1(); status = acpi_enable_subsystem(ACPI_NO_ACPI_ENABLE); if (ACPI_FAILURE(status)) { printk(KERN_ERR PREFIX "Unable to start the ACPI Interpreter\n"); goto error1; } /* * ACPI 2.0 requires the EC driver to be loaded and work before * the EC device is found in the namespace (i.e. before acpi_initialize_objects() * is called). * * This is accomplished by looking for the ECDT table, and getting * the EC parameters out of that. */ status = acpi_ec_ecdt_probe(); /* Ignore result. Not having an ECDT is not fatal. */ status = acpi_initialize_objects(ACPI_FULL_INITIALIZATION); if (ACPI_FAILURE(status)) { printk(KERN_ERR PREFIX "Unable to initialize ACPI objects\n"); goto error1; } /* * _OSC method may exist in module level code, * so it must be run after ACPI_FULL_INITIALIZATION */ acpi_bus_osc_support(); /* * _PDC control method may load dynamic SSDT tables, * and we need to install the table handler before that. */ acpi_sysfs_init(); acpi_early_processor_set_pdc(); /* * Maybe EC region is required at bus_scan/acpi_get_devices. So it * is necessary to enable it as early as possible. */ acpi_boot_ec_enable(); printk(KERN_INFO PREFIX "Interpreter enabled\n"); /* Initialize sleep structures */ acpi_sleep_init(); /* * Get the system interrupt model and evaluate \_PIC. */ result = acpi_bus_init_irq(); if (result) goto error1; /* * Register the for all standard device notifications. */ status = acpi_install_notify_handler(ACPI_ROOT_OBJECT, ACPI_SYSTEM_NOTIFY, &acpi_bus_notify, NULL); if (ACPI_FAILURE(status)) { printk(KERN_ERR PREFIX "Unable to register for device notifications\n"); goto error1; } /* * Create the top ACPI proc directory */ acpi_root_dir = proc_mkdir(ACPI_BUS_FILE_ROOT, NULL); return 0; /* Mimic structured exception handling */ error1: acpi_terminate(); return -ENODEV; } struct kobject *acpi_kobj; EXPORT_SYMBOL_GPL(acpi_kobj); static int __init acpi_init(void) { int result; if (acpi_disabled) { printk(KERN_INFO PREFIX "Interpreter disabled.\n"); return -ENODEV; } acpi_kobj = kobject_create_and_add("acpi", firmware_kobj); if (!acpi_kobj) { printk(KERN_WARNING "%s: kset create error\n", __func__); acpi_kobj = NULL; } init_acpi_device_notify(); result = acpi_bus_init(); if (result) { disable_acpi(); return result; } pci_mmcfg_late_init(); acpi_scan_init(); acpi_ec_init(); acpi_debugfs_init(); acpi_sleep_proc_init(); acpi_wakeup_device_init(); return 0; } subsys_initcall(acpi_init);