diff options
Diffstat (limited to 'drivers/acpi/bus.c')
| -rw-r--r-- | drivers/acpi/bus.c | 706 |
1 files changed, 706 insertions, 0 deletions
diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c new file mode 100644 index 000000000..513e7230e --- /dev/null +++ b/drivers/acpi/bus.c @@ -0,0 +1,706 @@ +/* + * acpi_bus.c - ACPI Bus Driver ($Revision: 80 $) + * + * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> + * + * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + * + * 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 <linux/module.h> +#include <linux/init.h> +#include <linux/ioport.h> +#include <linux/kernel.h> +#include <linux/list.h> +#include <linux/sched.h> +#include <linux/pm.h> +#include <linux/device.h> +#include <linux/proc_fs.h> +#include <linux/acpi.h> +#include <linux/slab.h> +#include <linux/regulator/machine.h> +#ifdef CONFIG_X86 +#include <asm/mpspec.h> +#endif +#include <linux/pci.h> +#include <acpi/apei.h> +#include <linux/dmi.h> +#include <linux/suspend.h> + +#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 +#ifdef CONFIG_ACPI_CUSTOM_DSDT +static inline int set_copy_dsdt(const struct dmi_system_id *id) +{ + return 0; +} +#else +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; +} +#endif + +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); + +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; + u32 ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE; + bool hotplug_event = false; + + switch (type) { + case ACPI_NOTIFY_BUS_CHECK: + acpi_handle_debug(handle, "ACPI_NOTIFY_BUS_CHECK event\n"); + hotplug_event = true; + break; + + case ACPI_NOTIFY_DEVICE_CHECK: + acpi_handle_debug(handle, "ACPI_NOTIFY_DEVICE_CHECK event\n"); + hotplug_event = true; + 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"); + hotplug_event = true; + 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); + + if (hotplug_event && ACPI_SUCCESS(acpi_hotplug_schedule(adev, type))) + return; + + 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_GIC: + message = "GIC"; + 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; +} + +/** + * acpi_early_init - Initialize ACPICA and populate the ACPI namespace. + * + * The ACPI tables are accessible after this, but the handling of events has not + * been initialized and the global lock is not available yet, so AML should not + * be executed at this point. + * + * Doing this before switching the EFI runtime services to virtual mode allows + * the EfiBootServices memory to be freed slightly earlier on boot. + */ +void __init acpi_early_init(void) +{ + acpi_status status; + + if (acpi_disabled) + return; + + printk(KERN_INFO PREFIX "Core revision %08x\n", ACPI_CA_VERSION); + + /* It's safe to verify table checksums during late stage */ + acpi_gbl_verify_table_checksum = TRUE; + + /* 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 + return; + + error0: + disable_acpi(); +} + +/** + * acpi_subsystem_init - Finalize the early initialization of ACPI. + * + * Switch over the platform to the ACPI mode (if possible), initialize the + * handling of ACPI events, install the interrupt and global lock handlers. + * + * Doing this too early is generally unsafe, but at the same time it needs to be + * done before all things that really depend on ACPI. The right spot appears to + * be before finalizing the EFI initialization. + */ +void __init acpi_subsystem_init(void) +{ + acpi_status status; + + if (acpi_disabled) + return; + + status = acpi_enable_subsystem(~ACPI_NO_ACPI_ENABLE); + if (ACPI_FAILURE(status)) { + printk(KERN_ERR PREFIX "Unable to enable ACPI\n"); + disable_acpi(); + } else { + /* + * 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(); + } +} + +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); |