diff options
Diffstat (limited to 'drivers/acpi/acpica/evxface.c')
| -rw-r--r-- | drivers/acpi/acpica/evxface.c | 928 |
1 files changed, 554 insertions, 374 deletions
diff --git a/drivers/acpi/acpica/evxface.c b/drivers/acpi/acpica/evxface.c index 2fe0809d4eb..11e5803b8b4 100644 --- a/drivers/acpi/acpica/evxface.c +++ b/drivers/acpi/acpica/evxface.c @@ -5,7 +5,7 @@ *****************************************************************************/ /* - * Copyright (C) 2000 - 2008, Intel Corp. + * Copyright (C) 2000 - 2014, Intel Corp. * All rights reserved. * * Redistribution and use in source and binary forms, with or without @@ -41,6 +41,8 @@ * POSSIBILITY OF SUCH DAMAGES. */ +#define EXPORT_ACPI_INTERFACES + #include <acpi/acpi.h> #include "accommon.h" #include "acnamesp.h" @@ -50,503 +52,668 @@ #define _COMPONENT ACPI_EVENTS ACPI_MODULE_NAME("evxface") + /******************************************************************************* * - * FUNCTION: acpi_install_exception_handler + * FUNCTION: acpi_install_notify_handler * - * PARAMETERS: Handler - Pointer to the handler function for the - * event + * PARAMETERS: device - The device for which notifies will be handled + * handler_type - The type of handler: + * ACPI_SYSTEM_NOTIFY: System Handler (00-7F) + * ACPI_DEVICE_NOTIFY: Device Handler (80-FF) + * ACPI_ALL_NOTIFY: Both System and Device + * handler - Address of the handler + * context - Value passed to the handler on each GPE * * RETURN: Status * - * DESCRIPTION: Saves the pointer to the handler function + * DESCRIPTION: Install a handler for notifications on an ACPI Device, + * thermal_zone, or Processor object. + * + * NOTES: The Root namespace object may have only one handler for each + * type of notify (System/Device). Device/Thermal/Processor objects + * may have one device notify handler, and multiple system notify + * handlers. * ******************************************************************************/ -#ifdef ACPI_FUTURE_USAGE -acpi_status acpi_install_exception_handler(acpi_exception_handler handler) +acpi_status +acpi_install_notify_handler(acpi_handle device, + u32 handler_type, + acpi_notify_handler handler, void *context) { + struct acpi_namespace_node *node = + ACPI_CAST_PTR(struct acpi_namespace_node, device); + union acpi_operand_object *obj_desc; + union acpi_operand_object *handler_obj; acpi_status status; + u32 i; - ACPI_FUNCTION_TRACE(acpi_install_exception_handler); + ACPI_FUNCTION_TRACE(acpi_install_notify_handler); - status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); + /* Parameter validation */ + + if ((!device) || (!handler) || (!handler_type) || + (handler_type > ACPI_MAX_NOTIFY_HANDLER_TYPE)) { + return_ACPI_STATUS(AE_BAD_PARAMETER); + } + + status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); if (ACPI_FAILURE(status)) { return_ACPI_STATUS(status); } - /* Don't allow two handlers. */ + /* + * Root Object: + * Registering a notify handler on the root object indicates that the + * caller wishes to receive notifications for all objects. Note that + * only one global handler can be registered per notify type. + * Ensure that a handler is not already installed. + */ + if (device == ACPI_ROOT_OBJECT) { + for (i = 0; i < ACPI_NUM_NOTIFY_TYPES; i++) { + if (handler_type & (i + 1)) { + if (acpi_gbl_global_notify[i].handler) { + status = AE_ALREADY_EXISTS; + goto unlock_and_exit; + } + + acpi_gbl_global_notify[i].handler = handler; + acpi_gbl_global_notify[i].context = context; + } + } - if (acpi_gbl_exception_handler) { - status = AE_ALREADY_EXISTS; - goto cleanup; + goto unlock_and_exit; /* Global notify handler installed, all done */ } - /* Install the handler */ + /* + * All Other Objects: + * Caller will only receive notifications specific to the target + * object. Note that only certain object types are allowed to + * receive notifications. + */ - acpi_gbl_exception_handler = handler; + /* Are Notifies allowed on this object? */ - cleanup: - (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS); + if (!acpi_ev_is_notify_object(node)) { + status = AE_TYPE; + goto unlock_and_exit; + } + + /* Check for an existing internal object, might not exist */ + + obj_desc = acpi_ns_get_attached_object(node); + if (!obj_desc) { + + /* Create a new object */ + + obj_desc = acpi_ut_create_internal_object(node->type); + if (!obj_desc) { + status = AE_NO_MEMORY; + goto unlock_and_exit; + } + + /* Attach new object to the Node, remove local reference */ + + status = acpi_ns_attach_object(device, obj_desc, node->type); + acpi_ut_remove_reference(obj_desc); + if (ACPI_FAILURE(status)) { + goto unlock_and_exit; + } + } + + /* Ensure that the handler is not already installed in the lists */ + + for (i = 0; i < ACPI_NUM_NOTIFY_TYPES; i++) { + if (handler_type & (i + 1)) { + handler_obj = obj_desc->common_notify.notify_list[i]; + while (handler_obj) { + if (handler_obj->notify.handler == handler) { + status = AE_ALREADY_EXISTS; + goto unlock_and_exit; + } + + handler_obj = handler_obj->notify.next[i]; + } + } + } + + /* Create and populate a new notify handler object */ + + handler_obj = acpi_ut_create_internal_object(ACPI_TYPE_LOCAL_NOTIFY); + if (!handler_obj) { + status = AE_NO_MEMORY; + goto unlock_and_exit; + } + + handler_obj->notify.node = node; + handler_obj->notify.handler_type = handler_type; + handler_obj->notify.handler = handler; + handler_obj->notify.context = context; + + /* Install the handler at the list head(s) */ + + for (i = 0; i < ACPI_NUM_NOTIFY_TYPES; i++) { + if (handler_type & (i + 1)) { + handler_obj->notify.next[i] = + obj_desc->common_notify.notify_list[i]; + + obj_desc->common_notify.notify_list[i] = handler_obj; + } + } + + /* Add an extra reference if handler was installed in both lists */ + + if (handler_type == ACPI_ALL_NOTIFY) { + acpi_ut_add_reference(handler_obj); + } + +unlock_and_exit: + (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); return_ACPI_STATUS(status); } -ACPI_EXPORT_SYMBOL(acpi_install_exception_handler) -#endif /* ACPI_FUTURE_USAGE */ +ACPI_EXPORT_SYMBOL(acpi_install_notify_handler) + /******************************************************************************* * - * FUNCTION: acpi_install_fixed_event_handler + * FUNCTION: acpi_remove_notify_handler * - * PARAMETERS: Event - Event type to enable. - * Handler - Pointer to the handler function for the - * event - * Context - Value passed to the handler on each GPE + * PARAMETERS: device - The device for which the handler is installed + * handler_type - The type of handler: + * ACPI_SYSTEM_NOTIFY: System Handler (00-7F) + * ACPI_DEVICE_NOTIFY: Device Handler (80-FF) + * ACPI_ALL_NOTIFY: Both System and Device + * handler - Address of the handler * * RETURN: Status * - * DESCRIPTION: Saves the pointer to the handler function and then enables the - * event. + * DESCRIPTION: Remove a handler for notifies on an ACPI device * ******************************************************************************/ acpi_status -acpi_install_fixed_event_handler(u32 event, - acpi_event_handler handler, void *context) +acpi_remove_notify_handler(acpi_handle device, + u32 handler_type, acpi_notify_handler handler) { - acpi_status status; + struct acpi_namespace_node *node = + ACPI_CAST_PTR(struct acpi_namespace_node, device); + union acpi_operand_object *obj_desc; + union acpi_operand_object *handler_obj; + union acpi_operand_object *previous_handler_obj; + acpi_status status = AE_OK; + u32 i; - ACPI_FUNCTION_TRACE(acpi_install_fixed_event_handler); + ACPI_FUNCTION_TRACE(acpi_remove_notify_handler); /* Parameter validation */ - if (event > ACPI_EVENT_MAX) { + if ((!device) || (!handler) || (!handler_type) || + (handler_type > ACPI_MAX_NOTIFY_HANDLER_TYPE)) { return_ACPI_STATUS(AE_BAD_PARAMETER); } - status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); - if (ACPI_FAILURE(status)) { - return_ACPI_STATUS(status); + /* Root Object. Global handlers are removed here */ + + if (device == ACPI_ROOT_OBJECT) { + for (i = 0; i < ACPI_NUM_NOTIFY_TYPES; i++) { + if (handler_type & (i + 1)) { + status = + acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); + if (ACPI_FAILURE(status)) { + return_ACPI_STATUS(status); + } + + if (!acpi_gbl_global_notify[i].handler || + (acpi_gbl_global_notify[i].handler != + handler)) { + status = AE_NOT_EXIST; + goto unlock_and_exit; + } + + ACPI_DEBUG_PRINT((ACPI_DB_INFO, + "Removing global notify handler\n")); + + acpi_gbl_global_notify[i].handler = NULL; + acpi_gbl_global_notify[i].context = NULL; + + (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); + + /* Make sure all deferred notify tasks are completed */ + + acpi_os_wait_events_complete(); + } + } + + return_ACPI_STATUS(AE_OK); } - /* Don't allow two handlers. */ + /* All other objects: Are Notifies allowed on this object? */ - if (NULL != acpi_gbl_fixed_event_handlers[event].handler) { - status = AE_ALREADY_EXISTS; - goto cleanup; + if (!acpi_ev_is_notify_object(node)) { + return_ACPI_STATUS(AE_TYPE); } - /* Install the handler before enabling the event */ + /* Must have an existing internal object */ - acpi_gbl_fixed_event_handlers[event].handler = handler; - acpi_gbl_fixed_event_handlers[event].context = context; + obj_desc = acpi_ns_get_attached_object(node); + if (!obj_desc) { + return_ACPI_STATUS(AE_NOT_EXIST); + } - status = acpi_clear_event(event); - if (ACPI_SUCCESS(status)) - status = acpi_enable_event(event, 0); - if (ACPI_FAILURE(status)) { - ACPI_WARNING((AE_INFO, "Could not enable fixed event %X", - event)); + /* Internal object exists. Find the handler and remove it */ - /* Remove the handler */ + for (i = 0; i < ACPI_NUM_NOTIFY_TYPES; i++) { + if (handler_type & (i + 1)) { + status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); + if (ACPI_FAILURE(status)) { + return_ACPI_STATUS(status); + } - acpi_gbl_fixed_event_handlers[event].handler = NULL; - acpi_gbl_fixed_event_handlers[event].context = NULL; - } else { - ACPI_DEBUG_PRINT((ACPI_DB_INFO, - "Enabled fixed event %X, Handler=%p\n", event, - handler)); + handler_obj = obj_desc->common_notify.notify_list[i]; + previous_handler_obj = NULL; + + /* Attempt to find the handler in the handler list */ + + while (handler_obj && + (handler_obj->notify.handler != handler)) { + previous_handler_obj = handler_obj; + handler_obj = handler_obj->notify.next[i]; + } + + if (!handler_obj) { + status = AE_NOT_EXIST; + goto unlock_and_exit; + } + + /* Remove the handler object from the list */ + + if (previous_handler_obj) { /* Handler is not at the list head */ + previous_handler_obj->notify.next[i] = + handler_obj->notify.next[i]; + } else { /* Handler is at the list head */ + + obj_desc->common_notify.notify_list[i] = + handler_obj->notify.next[i]; + } + + (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); + + /* Make sure all deferred notify tasks are completed */ + + acpi_os_wait_events_complete(); + acpi_ut_remove_reference(handler_obj); + } } - cleanup: - (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS); + return_ACPI_STATUS(status); + +unlock_and_exit: + (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); return_ACPI_STATUS(status); } -ACPI_EXPORT_SYMBOL(acpi_install_fixed_event_handler) +ACPI_EXPORT_SYMBOL(acpi_remove_notify_handler) /******************************************************************************* * - * FUNCTION: acpi_remove_fixed_event_handler + * FUNCTION: acpi_install_exception_handler * - * PARAMETERS: Event - Event type to disable. - * Handler - Address of the handler + * PARAMETERS: handler - Pointer to the handler function for the + * event * * RETURN: Status * - * DESCRIPTION: Disables the event and unregisters the event handler. + * DESCRIPTION: Saves the pointer to the handler function * ******************************************************************************/ -acpi_status -acpi_remove_fixed_event_handler(u32 event, acpi_event_handler handler) +#ifdef ACPI_FUTURE_USAGE +acpi_status acpi_install_exception_handler(acpi_exception_handler handler) { - acpi_status status = AE_OK; - - ACPI_FUNCTION_TRACE(acpi_remove_fixed_event_handler); - - /* Parameter validation */ + acpi_status status; - if (event > ACPI_EVENT_MAX) { - return_ACPI_STATUS(AE_BAD_PARAMETER); - } + ACPI_FUNCTION_TRACE(acpi_install_exception_handler); status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); if (ACPI_FAILURE(status)) { return_ACPI_STATUS(status); } - /* Disable the event before removing the handler */ - - status = acpi_disable_event(event, 0); + /* Don't allow two handlers. */ - /* Always Remove the handler */ + if (acpi_gbl_exception_handler) { + status = AE_ALREADY_EXISTS; + goto cleanup; + } - acpi_gbl_fixed_event_handlers[event].handler = NULL; - acpi_gbl_fixed_event_handlers[event].context = NULL; + /* Install the handler */ - if (ACPI_FAILURE(status)) { - ACPI_WARNING((AE_INFO, - "Could not write to fixed event enable register %X", - event)); - } else { - ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Disabled fixed event %X\n", - event)); - } + acpi_gbl_exception_handler = handler; +cleanup: (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS); return_ACPI_STATUS(status); } -ACPI_EXPORT_SYMBOL(acpi_remove_fixed_event_handler) +ACPI_EXPORT_SYMBOL(acpi_install_exception_handler) +#endif /* ACPI_FUTURE_USAGE */ +#if (!ACPI_REDUCED_HARDWARE) /******************************************************************************* * - * FUNCTION: acpi_install_notify_handler + * FUNCTION: acpi_install_sci_handler * - * PARAMETERS: Device - The device for which notifies will be handled - * handler_type - The type of handler: - * ACPI_SYSTEM_NOTIFY: system_handler (00-7f) - * ACPI_DEVICE_NOTIFY: driver_handler (80-ff) - * ACPI_ALL_NOTIFY: both system and device - * Handler - Address of the handler - * Context - Value passed to the handler on each GPE + * PARAMETERS: address - Address of the handler + * context - Value passed to the handler on each SCI * * RETURN: Status * - * DESCRIPTION: Install a handler for notifies on an ACPI device + * DESCRIPTION: Install a handler for a System Control Interrupt. * ******************************************************************************/ -acpi_status -acpi_install_notify_handler(acpi_handle device, - u32 handler_type, - acpi_notify_handler handler, void *context) +acpi_status acpi_install_sci_handler(acpi_sci_handler address, void *context) { - union acpi_operand_object *obj_desc; - union acpi_operand_object *notify_obj; - struct acpi_namespace_node *node; + struct acpi_sci_handler_info *new_sci_handler; + struct acpi_sci_handler_info *sci_handler; + acpi_cpu_flags flags; acpi_status status; - ACPI_FUNCTION_TRACE(acpi_install_notify_handler); - - /* Parameter validation */ + ACPI_FUNCTION_TRACE(acpi_install_sci_handler); - if ((!device) || - (!handler) || (handler_type > ACPI_MAX_NOTIFY_HANDLER_TYPE)) { + if (!address) { return_ACPI_STATUS(AE_BAD_PARAMETER); } - status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); - if (ACPI_FAILURE(status)) { - return_ACPI_STATUS(status); + /* Allocate and init a handler object */ + + new_sci_handler = ACPI_ALLOCATE(sizeof(struct acpi_sci_handler_info)); + if (!new_sci_handler) { + return_ACPI_STATUS(AE_NO_MEMORY); } - /* Convert and validate the device handle */ + new_sci_handler->address = address; + new_sci_handler->context = context; - node = acpi_ns_validate_handle(device); - if (!node) { - status = AE_BAD_PARAMETER; - goto unlock_and_exit; + status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); + if (ACPI_FAILURE(status)) { + goto exit; } - /* - * Root Object: - * Registering a notify handler on the root object indicates that the - * caller wishes to receive notifications for all objects. Note that - * only one <external> global handler can be regsitered (per notify type). - */ - if (device == ACPI_ROOT_OBJECT) { + /* Lock list during installation */ - /* Make sure the handler is not already installed */ + flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); + sci_handler = acpi_gbl_sci_handler_list; + + /* Ensure handler does not already exist */ - if (((handler_type & ACPI_SYSTEM_NOTIFY) && - acpi_gbl_system_notify.handler) || - ((handler_type & ACPI_DEVICE_NOTIFY) && - acpi_gbl_device_notify.handler)) { + while (sci_handler) { + if (address == sci_handler->address) { status = AE_ALREADY_EXISTS; goto unlock_and_exit; } - if (handler_type & ACPI_SYSTEM_NOTIFY) { - acpi_gbl_system_notify.node = node; - acpi_gbl_system_notify.handler = handler; - acpi_gbl_system_notify.context = context; - } - - if (handler_type & ACPI_DEVICE_NOTIFY) { - acpi_gbl_device_notify.node = node; - acpi_gbl_device_notify.handler = handler; - acpi_gbl_device_notify.context = context; - } - - /* Global notify handler installed */ + sci_handler = sci_handler->next; } - /* - * All Other Objects: - * Caller will only receive notifications specific to the target object. - * Note that only certain object types can receive notifications. - */ - else { - /* Notifies allowed on this object? */ + /* Install the new handler into the global list (at head) */ - if (!acpi_ev_is_notify_object(node)) { - status = AE_TYPE; - goto unlock_and_exit; - } + new_sci_handler->next = acpi_gbl_sci_handler_list; + acpi_gbl_sci_handler_list = new_sci_handler; - /* Check for an existing internal object */ +unlock_and_exit: - obj_desc = acpi_ns_get_attached_object(node); - if (obj_desc) { + acpi_os_release_lock(acpi_gbl_gpe_lock, flags); + (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS); - /* Object exists - make sure there's no handler */ +exit: + if (ACPI_FAILURE(status)) { + ACPI_FREE(new_sci_handler); + } + return_ACPI_STATUS(status); +} - if (((handler_type & ACPI_SYSTEM_NOTIFY) && - obj_desc->common_notify.system_notify) || - ((handler_type & ACPI_DEVICE_NOTIFY) && - obj_desc->common_notify.device_notify)) { - status = AE_ALREADY_EXISTS; - goto unlock_and_exit; - } - } else { - /* Create a new object */ +ACPI_EXPORT_SYMBOL(acpi_install_sci_handler) - obj_desc = acpi_ut_create_internal_object(node->type); - if (!obj_desc) { - status = AE_NO_MEMORY; - goto unlock_and_exit; - } +/******************************************************************************* + * + * FUNCTION: acpi_remove_sci_handler + * + * PARAMETERS: address - Address of the handler + * + * RETURN: Status + * + * DESCRIPTION: Remove a handler for a System Control Interrupt. + * + ******************************************************************************/ +acpi_status acpi_remove_sci_handler(acpi_sci_handler address) +{ + struct acpi_sci_handler_info *prev_sci_handler; + struct acpi_sci_handler_info *next_sci_handler; + acpi_cpu_flags flags; + acpi_status status; - /* Attach new object to the Node */ + ACPI_FUNCTION_TRACE(acpi_remove_sci_handler); - status = - acpi_ns_attach_object(device, obj_desc, node->type); + if (!address) { + return_ACPI_STATUS(AE_BAD_PARAMETER); + } - /* Remove local reference to the object */ + status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); + if (ACPI_FAILURE(status)) { + return_ACPI_STATUS(status); + } - acpi_ut_remove_reference(obj_desc); - if (ACPI_FAILURE(status)) { - goto unlock_and_exit; - } - } + /* Remove the SCI handler with lock */ - /* Install the handler */ + flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); - notify_obj = - acpi_ut_create_internal_object(ACPI_TYPE_LOCAL_NOTIFY); - if (!notify_obj) { - status = AE_NO_MEMORY; - goto unlock_and_exit; - } + prev_sci_handler = NULL; + next_sci_handler = acpi_gbl_sci_handler_list; + while (next_sci_handler) { + if (next_sci_handler->address == address) { - notify_obj->notify.node = node; - notify_obj->notify.handler = handler; - notify_obj->notify.context = context; + /* Unlink and free the SCI handler info block */ - if (handler_type & ACPI_SYSTEM_NOTIFY) { - obj_desc->common_notify.system_notify = notify_obj; - } + if (prev_sci_handler) { + prev_sci_handler->next = next_sci_handler->next; + } else { + acpi_gbl_sci_handler_list = + next_sci_handler->next; + } - if (handler_type & ACPI_DEVICE_NOTIFY) { - obj_desc->common_notify.device_notify = notify_obj; + acpi_os_release_lock(acpi_gbl_gpe_lock, flags); + ACPI_FREE(next_sci_handler); + goto unlock_and_exit; } - if (handler_type == ACPI_ALL_NOTIFY) { - - /* Extra ref if installed in both */ - - acpi_ut_add_reference(notify_obj); - } + prev_sci_handler = next_sci_handler; + next_sci_handler = next_sci_handler->next; } - unlock_and_exit: - (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); + acpi_os_release_lock(acpi_gbl_gpe_lock, flags); + status = AE_NOT_EXIST; + +unlock_and_exit: + (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS); return_ACPI_STATUS(status); } -ACPI_EXPORT_SYMBOL(acpi_install_notify_handler) +ACPI_EXPORT_SYMBOL(acpi_remove_sci_handler) /******************************************************************************* * - * FUNCTION: acpi_remove_notify_handler + * FUNCTION: acpi_install_global_event_handler * - * PARAMETERS: Device - The device for which notifies will be handled - * handler_type - The type of handler: - * ACPI_SYSTEM_NOTIFY: system_handler (00-7f) - * ACPI_DEVICE_NOTIFY: driver_handler (80-ff) - * ACPI_ALL_NOTIFY: both system and device - * Handler - Address of the handler + * PARAMETERS: handler - Pointer to the global event handler function + * context - Value passed to the handler on each event * * RETURN: Status * - * DESCRIPTION: Remove a handler for notifies on an ACPI device + * DESCRIPTION: Saves the pointer to the handler function. The global handler + * is invoked upon each incoming GPE and Fixed Event. It is + * invoked at interrupt level at the time of the event dispatch. + * Can be used to update event counters, etc. * ******************************************************************************/ acpi_status -acpi_remove_notify_handler(acpi_handle device, - u32 handler_type, acpi_notify_handler handler) +acpi_install_global_event_handler(acpi_gbl_event_handler handler, void *context) { - union acpi_operand_object *notify_obj; - union acpi_operand_object *obj_desc; - struct acpi_namespace_node *node; acpi_status status; - ACPI_FUNCTION_TRACE(acpi_remove_notify_handler); + ACPI_FUNCTION_TRACE(acpi_install_global_event_handler); /* Parameter validation */ - if ((!device) || - (!handler) || (handler_type > ACPI_MAX_NOTIFY_HANDLER_TYPE)) { - status = AE_BAD_PARAMETER; - goto exit; + if (!handler) { + return_ACPI_STATUS(AE_BAD_PARAMETER); } - status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); + status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); if (ACPI_FAILURE(status)) { - goto exit; + return_ACPI_STATUS(status); } - /* Convert and validate the device handle */ + /* Don't allow two handlers. */ - node = acpi_ns_validate_handle(device); - if (!node) { - status = AE_BAD_PARAMETER; - goto unlock_and_exit; + if (acpi_gbl_global_event_handler) { + status = AE_ALREADY_EXISTS; + goto cleanup; } - /* Root Object */ + acpi_gbl_global_event_handler = handler; + acpi_gbl_global_event_handler_context = context; - if (device == ACPI_ROOT_OBJECT) { - ACPI_DEBUG_PRINT((ACPI_DB_INFO, - "Removing notify handler for namespace root object\n")); +cleanup: + (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS); + return_ACPI_STATUS(status); +} - if (((handler_type & ACPI_SYSTEM_NOTIFY) && - !acpi_gbl_system_notify.handler) || - ((handler_type & ACPI_DEVICE_NOTIFY) && - !acpi_gbl_device_notify.handler)) { - status = AE_NOT_EXIST; - goto unlock_and_exit; - } +ACPI_EXPORT_SYMBOL(acpi_install_global_event_handler) - /* Make sure all deferred tasks are completed */ +/******************************************************************************* + * + * FUNCTION: acpi_install_fixed_event_handler + * + * PARAMETERS: event - Event type to enable. + * handler - Pointer to the handler function for the + * event + * context - Value passed to the handler on each GPE + * + * RETURN: Status + * + * DESCRIPTION: Saves the pointer to the handler function and then enables the + * event. + * + ******************************************************************************/ +acpi_status +acpi_install_fixed_event_handler(u32 event, + acpi_event_handler handler, void *context) +{ + acpi_status status; - (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); - acpi_os_wait_events_complete(NULL); - status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); - if (ACPI_FAILURE(status)) { - goto exit; - } + ACPI_FUNCTION_TRACE(acpi_install_fixed_event_handler); - if (handler_type & ACPI_SYSTEM_NOTIFY) { - acpi_gbl_system_notify.node = NULL; - acpi_gbl_system_notify.handler = NULL; - acpi_gbl_system_notify.context = NULL; - } + /* Parameter validation */ - if (handler_type & ACPI_DEVICE_NOTIFY) { - acpi_gbl_device_notify.node = NULL; - acpi_gbl_device_notify.handler = NULL; - acpi_gbl_device_notify.context = NULL; - } + if (event > ACPI_EVENT_MAX) { + return_ACPI_STATUS(AE_BAD_PARAMETER); } - /* All Other Objects */ + status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); + if (ACPI_FAILURE(status)) { + return_ACPI_STATUS(status); + } - else { - /* Notifies allowed on this object? */ + /* Do not allow multiple handlers */ - if (!acpi_ev_is_notify_object(node)) { - status = AE_TYPE; - goto unlock_and_exit; - } + if (acpi_gbl_fixed_event_handlers[event].handler) { + status = AE_ALREADY_EXISTS; + goto cleanup; + } - /* Check for an existing internal object */ + /* Install the handler before enabling the event */ - obj_desc = acpi_ns_get_attached_object(node); - if (!obj_desc) { - status = AE_NOT_EXIST; - goto unlock_and_exit; - } + acpi_gbl_fixed_event_handlers[event].handler = handler; + acpi_gbl_fixed_event_handlers[event].context = context; - /* Object exists - make sure there's an existing handler */ + status = acpi_clear_event(event); + if (ACPI_SUCCESS(status)) + status = acpi_enable_event(event, 0); + if (ACPI_FAILURE(status)) { + ACPI_WARNING((AE_INFO, + "Could not enable fixed event - %s (%u)", + acpi_ut_get_event_name(event), event)); - if (handler_type & ACPI_SYSTEM_NOTIFY) { - notify_obj = obj_desc->common_notify.system_notify; - if (!notify_obj) { - status = AE_NOT_EXIST; - goto unlock_and_exit; - } + /* Remove the handler */ - if (notify_obj->notify.handler != handler) { - status = AE_BAD_PARAMETER; - goto unlock_and_exit; - } - /* Make sure all deferred tasks are completed */ + acpi_gbl_fixed_event_handlers[event].handler = NULL; + acpi_gbl_fixed_event_handlers[event].context = NULL; + } else { + ACPI_DEBUG_PRINT((ACPI_DB_INFO, + "Enabled fixed event %s (%X), Handler=%p\n", + acpi_ut_get_event_name(event), event, + handler)); + } - (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); - acpi_os_wait_events_complete(NULL); - status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); - if (ACPI_FAILURE(status)) { - goto exit; - } +cleanup: + (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS); + return_ACPI_STATUS(status); +} - /* Remove the handler */ - obj_desc->common_notify.system_notify = NULL; - acpi_ut_remove_reference(notify_obj); - } +ACPI_EXPORT_SYMBOL(acpi_install_fixed_event_handler) - if (handler_type & ACPI_DEVICE_NOTIFY) { - notify_obj = obj_desc->common_notify.device_notify; - if (!notify_obj) { - status = AE_NOT_EXIST; - goto unlock_and_exit; - } +/******************************************************************************* + * + * FUNCTION: acpi_remove_fixed_event_handler + * + * PARAMETERS: event - Event type to disable. + * handler - Address of the handler + * + * RETURN: Status + * + * DESCRIPTION: Disables the event and unregisters the event handler. + * + ******************************************************************************/ +acpi_status +acpi_remove_fixed_event_handler(u32 event, acpi_event_handler handler) +{ + acpi_status status = AE_OK; - if (notify_obj->notify.handler != handler) { - status = AE_BAD_PARAMETER; - goto unlock_and_exit; - } - /* Make sure all deferred tasks are completed */ + ACPI_FUNCTION_TRACE(acpi_remove_fixed_event_handler); - (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); - acpi_os_wait_events_complete(NULL); - status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); - if (ACPI_FAILURE(status)) { - goto exit; - } + /* Parameter validation */ - /* Remove the handler */ - obj_desc->common_notify.device_notify = NULL; - acpi_ut_remove_reference(notify_obj); - } + if (event > ACPI_EVENT_MAX) { + return_ACPI_STATUS(AE_BAD_PARAMETER); } - unlock_and_exit: - (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); - exit: - if (ACPI_FAILURE(status)) - ACPI_EXCEPTION((AE_INFO, status, "Removing notify handler")); + status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); + if (ACPI_FAILURE(status)) { + return_ACPI_STATUS(status); + } + + /* Disable the event before removing the handler */ + + status = acpi_disable_event(event, 0); + + /* Always Remove the handler */ + + acpi_gbl_fixed_event_handlers[event].handler = NULL; + acpi_gbl_fixed_event_handlers[event].context = NULL; + + if (ACPI_FAILURE(status)) { + ACPI_WARNING((AE_INFO, + "Could not disable fixed event - %s (%u)", + acpi_ut_get_event_name(event), event)); + } else { + ACPI_DEBUG_PRINT((ACPI_DB_INFO, + "Disabled fixed event - %s (%X)\n", + acpi_ut_get_event_name(event), event)); + } + + (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS); return_ACPI_STATUS(status); } -ACPI_EXPORT_SYMBOL(acpi_remove_notify_handler) +ACPI_EXPORT_SYMBOL(acpi_remove_fixed_event_handler) /******************************************************************************* * @@ -555,10 +722,10 @@ ACPI_EXPORT_SYMBOL(acpi_remove_notify_handler) * PARAMETERS: gpe_device - Namespace node for the GPE (NULL for FADT * defined GPEs) * gpe_number - The GPE number within the GPE block - * Type - Whether this GPE should be treated as an + * type - Whether this GPE should be treated as an * edge- or level-triggered interrupt. - * Address - Address of the handler - * Context - Value passed to the handler on each GPE + * address - Address of the handler + * context - Value passed to the handler on each GPE * * RETURN: Status * @@ -568,10 +735,10 @@ ACPI_EXPORT_SYMBOL(acpi_remove_notify_handler) acpi_status acpi_install_gpe_handler(acpi_handle gpe_device, u32 gpe_number, - u32 type, acpi_event_handler address, void *context) + u32 type, acpi_gpe_handler address, void *context) { struct acpi_gpe_event_info *gpe_event_info; - struct acpi_handler_info *handler; + struct acpi_gpe_handler_info *handler; acpi_status status; acpi_cpu_flags flags; @@ -579,22 +746,31 @@ acpi_install_gpe_handler(acpi_handle gpe_device, /* Parameter validation */ - if ((!address) || (type > ACPI_GPE_XRUPT_TYPE_MASK)) { - status = AE_BAD_PARAMETER; - goto exit; + if ((!address) || (type & ~ACPI_GPE_XRUPT_TYPE_MASK)) { + return_ACPI_STATUS(AE_BAD_PARAMETER); } status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); if (ACPI_FAILURE(status)) { - goto exit; + return_ACPI_STATUS(status); + } + + /* Allocate and init handler object (before lock) */ + + handler = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_gpe_handler_info)); + if (!handler) { + status = AE_NO_MEMORY; + goto unlock_and_exit; } + flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); + /* Ensure that we have a valid GPE number */ gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number); if (!gpe_event_info) { status = AE_BAD_PARAMETER; - goto unlock_and_exit; + goto free_and_exit; } /* Make sure that there isn't a handler there already */ @@ -602,34 +778,33 @@ acpi_install_gpe_handler(acpi_handle gpe_device, if ((gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) == ACPI_GPE_DISPATCH_HANDLER) { status = AE_ALREADY_EXISTS; - goto unlock_and_exit; - } - - /* Allocate and init handler object */ - - handler = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_handler_info)); - if (!handler) { - status = AE_NO_MEMORY; - goto unlock_and_exit; + goto free_and_exit; } handler->address = address; handler->context = context; handler->method_node = gpe_event_info->dispatch.method_node; + handler->original_flags = (u8)(gpe_event_info->flags & + (ACPI_GPE_XRUPT_TYPE_MASK | + ACPI_GPE_DISPATCH_MASK)); - /* Disable the GPE before installing the handler */ + /* + * If the GPE is associated with a method, it may have been enabled + * automatically during initialization, in which case it has to be + * disabled now to avoid spurious execution of the handler. + */ - status = acpi_ev_disable_gpe(gpe_event_info); - if (ACPI_FAILURE(status)) { - goto unlock_and_exit; + if ((handler->original_flags & ACPI_GPE_DISPATCH_METHOD) + && gpe_event_info->runtime_count) { + handler->originally_enabled = 1; + (void)acpi_ev_remove_gpe_reference(gpe_event_info); } /* Install the handler */ - flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); gpe_event_info->dispatch.handler = handler; - /* Setup up dispatch flags to indicate handler (vs. method) */ + /* Setup up dispatch flags to indicate handler (vs. method/notify) */ gpe_event_info->flags &= ~(ACPI_GPE_XRUPT_TYPE_MASK | ACPI_GPE_DISPATCH_MASK); @@ -637,13 +812,14 @@ acpi_install_gpe_handler(acpi_handle gpe_device, acpi_os_release_lock(acpi_gbl_gpe_lock, flags); - unlock_and_exit: +unlock_and_exit: (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS); - exit: - if (ACPI_FAILURE(status)) - ACPI_EXCEPTION((AE_INFO, status, - "Installing notify handler failed")); return_ACPI_STATUS(status); + +free_and_exit: + acpi_os_release_lock(acpi_gbl_gpe_lock, flags); + ACPI_FREE(handler); + goto unlock_and_exit; } ACPI_EXPORT_SYMBOL(acpi_install_gpe_handler) @@ -655,7 +831,7 @@ ACPI_EXPORT_SYMBOL(acpi_install_gpe_handler) * PARAMETERS: gpe_device - Namespace node for the GPE (NULL for FADT * defined GPEs) * gpe_number - The event to remove a handler - * Address - Address of the handler + * address - Address of the handler * * RETURN: Status * @@ -664,10 +840,10 @@ ACPI_EXPORT_SYMBOL(acpi_install_gpe_handler) ******************************************************************************/ acpi_status acpi_remove_gpe_handler(acpi_handle gpe_device, - u32 gpe_number, acpi_event_handler address) + u32 gpe_number, acpi_gpe_handler address) { struct acpi_gpe_event_info *gpe_event_info; - struct acpi_handler_info *handler; + struct acpi_gpe_handler_info *handler; acpi_status status; acpi_cpu_flags flags; @@ -684,6 +860,8 @@ acpi_remove_gpe_handler(acpi_handle gpe_device, return_ACPI_STATUS(status); } + flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); + /* Ensure that we have a valid GPE number */ gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number); @@ -707,41 +885,42 @@ acpi_remove_gpe_handler(acpi_handle gpe_device, goto unlock_and_exit; } - /* Disable the GPE before removing the handler */ - - status = acpi_ev_disable_gpe(gpe_event_info); - if (ACPI_FAILURE(status)) { - goto unlock_and_exit; - } - - /* Make sure all deferred tasks are completed */ - - (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS); - acpi_os_wait_events_complete(NULL); - status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS); - if (ACPI_FAILURE(status)) { - return_ACPI_STATUS(status); - } - /* Remove the handler */ - flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); handler = gpe_event_info->dispatch.handler; /* Restore Method node (if any), set dispatch flags */ gpe_event_info->dispatch.method_node = handler->method_node; - gpe_event_info->flags &= ~ACPI_GPE_DISPATCH_MASK; /* Clear bits */ - if (handler->method_node) { - gpe_event_info->flags |= ACPI_GPE_DISPATCH_METHOD; + gpe_event_info->flags &= + ~(ACPI_GPE_XRUPT_TYPE_MASK | ACPI_GPE_DISPATCH_MASK); + gpe_event_info->flags |= handler->original_flags; + + /* + * If the GPE was previously associated with a method and it was + * enabled, it should be enabled at this point to restore the + * post-initialization configuration. + */ + if ((handler->original_flags & ACPI_GPE_DISPATCH_METHOD) && + handler->originally_enabled) { + (void)acpi_ev_add_gpe_reference(gpe_event_info); } + acpi_os_release_lock(acpi_gbl_gpe_lock, flags); + (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS); + + /* Make sure all deferred GPE tasks are completed */ + + acpi_os_wait_events_complete(); /* Now we can free the handler object */ ACPI_FREE(handler); + return_ACPI_STATUS(status); + +unlock_and_exit: + acpi_os_release_lock(acpi_gbl_gpe_lock, flags); - unlock_and_exit: (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS); return_ACPI_STATUS(status); } @@ -752,8 +931,8 @@ ACPI_EXPORT_SYMBOL(acpi_remove_gpe_handler) * * FUNCTION: acpi_acquire_global_lock * - * PARAMETERS: Timeout - How long the caller is willing to wait - * Handle - Where the handle to the lock is returned + * PARAMETERS: timeout - How long the caller is willing to wait + * handle - Where the handle to the lock is returned * (if acquired) * * RETURN: Status @@ -800,7 +979,7 @@ ACPI_EXPORT_SYMBOL(acpi_acquire_global_lock) * * FUNCTION: acpi_release_global_lock * - * PARAMETERS: Handle - Returned from acpi_acquire_global_lock + * PARAMETERS: handle - Returned from acpi_acquire_global_lock * * RETURN: Status * @@ -820,3 +999,4 @@ acpi_status acpi_release_global_lock(u32 handle) } ACPI_EXPORT_SYMBOL(acpi_release_global_lock) +#endif /* !ACPI_REDUCED_HARDWARE */ |