341 строка
9.7 KiB
C
341 строка
9.7 KiB
C
/******************************************************************************
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*
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* Module Name: evmisc - Miscellaneous event manager support functions
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*
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*****************************************************************************/
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/*
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* Copyright (C) 2000 - 2012, Intel Corp.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification.
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* 2. Redistributions in binary form must reproduce at minimum a disclaimer
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* substantially similar to the "NO WARRANTY" disclaimer below
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* ("Disclaimer") and any redistribution must be conditioned upon
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* including a substantially similar Disclaimer requirement for further
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* binary redistribution.
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* 3. Neither the names of the above-listed copyright holders nor the names
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* of any contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* NO WARRANTY
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGES.
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*/
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#include <acpi/acpi.h>
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#include "accommon.h"
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#include "acevents.h"
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#include "acnamesp.h"
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#define _COMPONENT ACPI_EVENTS
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ACPI_MODULE_NAME("evmisc")
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/* Local prototypes */
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static void ACPI_SYSTEM_XFACE acpi_ev_notify_dispatch(void *context);
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/*******************************************************************************
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*
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* FUNCTION: acpi_ev_is_notify_object
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*
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* PARAMETERS: Node - Node to check
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*
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* RETURN: TRUE if notifies allowed on this object
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*
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* DESCRIPTION: Check type of node for a object that supports notifies.
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*
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* TBD: This could be replaced by a flag bit in the node.
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*
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******************************************************************************/
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u8 acpi_ev_is_notify_object(struct acpi_namespace_node *node)
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{
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switch (node->type) {
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case ACPI_TYPE_DEVICE:
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case ACPI_TYPE_PROCESSOR:
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case ACPI_TYPE_THERMAL:
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/*
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* These are the ONLY objects that can receive ACPI notifications
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*/
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return (TRUE);
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default:
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return (FALSE);
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}
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ev_queue_notify_request
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*
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* PARAMETERS: Node - NS node for the notified object
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* notify_value - Value from the Notify() request
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*
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* RETURN: Status
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*
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* DESCRIPTION: Dispatch a device notification event to a previously
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* installed handler.
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*
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******************************************************************************/
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acpi_status
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acpi_ev_queue_notify_request(struct acpi_namespace_node * node,
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u32 notify_value)
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{
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union acpi_operand_object *obj_desc;
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union acpi_operand_object *handler_obj = NULL;
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union acpi_generic_state *notify_info;
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acpi_status status = AE_OK;
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ACPI_FUNCTION_NAME(ev_queue_notify_request);
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/*
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* For value 3 (Ejection Request), some device method may need to be run.
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* For value 2 (Device Wake) if _PRW exists, the _PS0 method may need
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* to be run.
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* For value 0x80 (Status Change) on the power button or sleep button,
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* initiate soft-off or sleep operation?
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*/
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ACPI_DEBUG_PRINT((ACPI_DB_INFO,
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"Dispatching Notify on [%4.4s] Node %p Value 0x%2.2X (%s)\n",
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acpi_ut_get_node_name(node), node, notify_value,
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acpi_ut_get_notify_name(notify_value)));
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/* Get the notify object attached to the NS Node */
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obj_desc = acpi_ns_get_attached_object(node);
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if (obj_desc) {
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/* We have the notify object, Get the right handler */
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switch (node->type) {
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/* Notify allowed only on these types */
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case ACPI_TYPE_DEVICE:
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case ACPI_TYPE_THERMAL:
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case ACPI_TYPE_PROCESSOR:
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if (notify_value <= ACPI_MAX_SYS_NOTIFY) {
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handler_obj =
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obj_desc->common_notify.system_notify;
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} else {
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handler_obj =
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obj_desc->common_notify.device_notify;
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}
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break;
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default:
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/* All other types are not supported */
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return (AE_TYPE);
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}
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}
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/*
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* If there is any handler to run, schedule the dispatcher.
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* Check for:
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* 1) Global system notify handler
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* 2) Global device notify handler
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* 3) Per-device notify handler
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*/
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if ((acpi_gbl_system_notify.handler &&
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(notify_value <= ACPI_MAX_SYS_NOTIFY)) ||
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(acpi_gbl_device_notify.handler &&
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(notify_value > ACPI_MAX_SYS_NOTIFY)) || handler_obj) {
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notify_info = acpi_ut_create_generic_state();
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if (!notify_info) {
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return (AE_NO_MEMORY);
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}
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if (!handler_obj) {
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ACPI_DEBUG_PRINT((ACPI_DB_INFO,
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"Executing system notify handler for Notify (%4.4s, %X) "
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"node %p\n",
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acpi_ut_get_node_name(node),
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notify_value, node));
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}
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notify_info->common.descriptor_type =
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ACPI_DESC_TYPE_STATE_NOTIFY;
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notify_info->notify.node = node;
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notify_info->notify.value = (u16) notify_value;
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notify_info->notify.handler_obj = handler_obj;
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status =
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acpi_os_execute(OSL_NOTIFY_HANDLER, acpi_ev_notify_dispatch,
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notify_info);
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if (ACPI_FAILURE(status)) {
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acpi_ut_delete_generic_state(notify_info);
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}
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} else {
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/* There is no notify handler (per-device or system) for this device */
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ACPI_DEBUG_PRINT((ACPI_DB_INFO,
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"No notify handler for Notify (%4.4s, %X) node %p\n",
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acpi_ut_get_node_name(node), notify_value,
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node));
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}
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return (status);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ev_notify_dispatch
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*
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* PARAMETERS: Context - To be passed to the notify handler
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*
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* RETURN: None.
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*
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* DESCRIPTION: Dispatch a device notification event to a previously
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* installed handler.
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*
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******************************************************************************/
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static void ACPI_SYSTEM_XFACE acpi_ev_notify_dispatch(void *context)
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{
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union acpi_generic_state *notify_info =
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(union acpi_generic_state *)context;
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acpi_notify_handler global_handler = NULL;
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void *global_context = NULL;
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union acpi_operand_object *handler_obj;
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ACPI_FUNCTION_ENTRY();
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/*
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* We will invoke a global notify handler if installed. This is done
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* _before_ we invoke the per-device handler attached to the device.
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*/
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if (notify_info->notify.value <= ACPI_MAX_SYS_NOTIFY) {
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/* Global system notification handler */
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if (acpi_gbl_system_notify.handler) {
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global_handler = acpi_gbl_system_notify.handler;
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global_context = acpi_gbl_system_notify.context;
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}
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} else {
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/* Global driver notification handler */
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if (acpi_gbl_device_notify.handler) {
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global_handler = acpi_gbl_device_notify.handler;
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global_context = acpi_gbl_device_notify.context;
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}
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}
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/* Invoke the system handler first, if present */
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if (global_handler) {
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global_handler(notify_info->notify.node,
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notify_info->notify.value, global_context);
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}
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/* Now invoke the per-device handler, if present */
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handler_obj = notify_info->notify.handler_obj;
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if (handler_obj) {
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struct acpi_object_notify_handler *notifier;
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notifier = &handler_obj->notify;
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while (notifier) {
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notifier->handler(notify_info->notify.node,
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notify_info->notify.value,
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notifier->context);
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notifier = notifier->next;
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}
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}
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/* All done with the info object */
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acpi_ut_delete_generic_state(notify_info);
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}
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/******************************************************************************
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*
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* FUNCTION: acpi_ev_terminate
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*
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* PARAMETERS: none
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*
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* RETURN: none
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*
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* DESCRIPTION: Disable events and free memory allocated for table storage.
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*
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******************************************************************************/
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void acpi_ev_terminate(void)
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{
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u32 i;
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acpi_status status;
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ACPI_FUNCTION_TRACE(ev_terminate);
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if (acpi_gbl_events_initialized) {
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/*
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* Disable all event-related functionality. In all cases, on error,
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* print a message but obviously we don't abort.
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*/
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/* Disable all fixed events */
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for (i = 0; i < ACPI_NUM_FIXED_EVENTS; i++) {
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status = acpi_disable_event(i, 0);
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if (ACPI_FAILURE(status)) {
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ACPI_ERROR((AE_INFO,
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"Could not disable fixed event %u",
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(u32) i));
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}
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}
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/* Disable all GPEs in all GPE blocks */
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status = acpi_ev_walk_gpe_list(acpi_hw_disable_gpe_block, NULL);
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/* Remove SCI handler */
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status = acpi_ev_remove_sci_handler();
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if (ACPI_FAILURE(status)) {
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ACPI_ERROR((AE_INFO, "Could not remove SCI handler"));
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}
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status = acpi_ev_remove_global_lock_handler();
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if (ACPI_FAILURE(status)) {
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ACPI_ERROR((AE_INFO,
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"Could not remove Global Lock handler"));
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}
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}
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/* Deallocate all handler objects installed within GPE info structs */
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status = acpi_ev_walk_gpe_list(acpi_ev_delete_gpe_handlers, NULL);
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/* Return to original mode if necessary */
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if (acpi_gbl_original_mode == ACPI_SYS_MODE_LEGACY) {
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status = acpi_disable();
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if (ACPI_FAILURE(status)) {
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ACPI_WARNING((AE_INFO, "AcpiDisable failed"));
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}
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}
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return_VOID;
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}
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