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333 lines
9.2 KiB
C
333 lines
9.2 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 - 2019, 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.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
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AcpiEvNotifyDispatch (
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void *Context);
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/*******************************************************************************
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*
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* FUNCTION: AcpiEvIsNotifyObject
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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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BOOLEAN
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AcpiEvIsNotifyObject (
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ACPI_NAMESPACE_NODE *Node)
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{
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switch (Node->Type)
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{
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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: AcpiEvQueueNotifyRequest
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*
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* PARAMETERS: Node - NS node for the notified object
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* NotifyValue - 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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AcpiEvQueueNotifyRequest (
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ACPI_NAMESPACE_NODE *Node,
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UINT32 NotifyValue)
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{
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ACPI_OPERAND_OBJECT *ObjDesc;
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ACPI_OPERAND_OBJECT *HandlerListHead = NULL;
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ACPI_GENERIC_STATE *Info;
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UINT8 HandlerListId = 0;
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ACPI_STATUS Status = AE_OK;
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ACPI_FUNCTION_NAME (EvQueueNotifyRequest);
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/* Are Notifies allowed on this object? */
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if (!AcpiEvIsNotifyObject (Node))
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{
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return (AE_TYPE);
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}
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/* Get the correct notify list type (System or Device) */
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if (NotifyValue <= ACPI_MAX_SYS_NOTIFY)
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{
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HandlerListId = ACPI_SYSTEM_HANDLER_LIST;
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}
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else
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{
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HandlerListId = ACPI_DEVICE_HANDLER_LIST;
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}
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/* Get the notify object attached to the namespace Node */
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ObjDesc = AcpiNsGetAttachedObject (Node);
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if (ObjDesc)
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{
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/* We have an attached object, Get the correct handler list */
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HandlerListHead = ObjDesc->CommonNotify.NotifyList[HandlerListId];
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}
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/*
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* If there is no notify handler (Global or Local)
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* for this object, just ignore the notify
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*/
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if (!AcpiGbl_GlobalNotify[HandlerListId].Handler && !HandlerListHead)
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{
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ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
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"No notify handler for Notify, ignoring (%4.4s, %X) node %p\n",
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AcpiUtGetNodeName (Node), NotifyValue, Node));
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return (AE_OK);
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}
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/* Setup notify info and schedule the notify dispatcher */
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Info = AcpiUtCreateGenericState ();
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if (!Info)
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{
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return (AE_NO_MEMORY);
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}
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Info->Common.DescriptorType = ACPI_DESC_TYPE_STATE_NOTIFY;
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Info->Notify.Node = Node;
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Info->Notify.Value = (UINT16) NotifyValue;
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Info->Notify.HandlerListId = HandlerListId;
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Info->Notify.HandlerListHead = HandlerListHead;
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Info->Notify.Global = &AcpiGbl_GlobalNotify[HandlerListId];
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ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
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"Dispatching Notify on [%4.4s] (%s) Value 0x%2.2X (%s) Node %p\n",
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AcpiUtGetNodeName (Node), AcpiUtGetTypeName (Node->Type),
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NotifyValue, AcpiUtGetNotifyName (NotifyValue, ACPI_TYPE_ANY), Node));
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Status = AcpiOsExecute (OSL_NOTIFY_HANDLER,
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AcpiEvNotifyDispatch, Info);
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if (ACPI_FAILURE (Status))
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{
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AcpiUtDeleteGenericState (Info);
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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: AcpiEvNotifyDispatch
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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
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AcpiEvNotifyDispatch (
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void *Context)
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{
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ACPI_GENERIC_STATE *Info = (ACPI_GENERIC_STATE *) Context;
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ACPI_OPERAND_OBJECT *HandlerObj;
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ACPI_FUNCTION_ENTRY ();
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/* Invoke a global notify handler if installed */
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if (Info->Notify.Global->Handler)
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{
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Info->Notify.Global->Handler (Info->Notify.Node,
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Info->Notify.Value,
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Info->Notify.Global->Context);
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}
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/* Now invoke the local notify handler(s) if any are installed */
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HandlerObj = Info->Notify.HandlerListHead;
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while (HandlerObj)
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{
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HandlerObj->Notify.Handler (Info->Notify.Node,
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Info->Notify.Value,
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HandlerObj->Notify.Context);
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HandlerObj = HandlerObj->Notify.Next[Info->Notify.HandlerListId];
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}
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/* All done with the info object */
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AcpiUtDeleteGenericState (Info);
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}
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#if (!ACPI_REDUCED_HARDWARE)
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/******************************************************************************
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*
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* FUNCTION: AcpiEvTerminate
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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
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AcpiEvTerminate (
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void)
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{
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UINT32 i;
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ACPI_STATUS Status;
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ACPI_FUNCTION_TRACE (EvTerminate);
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if (AcpiGbl_EventsInitialized)
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{
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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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{
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Status = AcpiDisableEvent (i, 0);
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if (ACPI_FAILURE (Status))
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{
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ACPI_ERROR ((AE_INFO,
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"Could not disable fixed event %u", (UINT32) 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 = AcpiEvWalkGpeList (AcpiHwDisableGpeBlock, NULL);
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Status = AcpiEvRemoveGlobalLockHandler ();
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if (ACPI_FAILURE(Status))
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{
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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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AcpiGbl_EventsInitialized = FALSE;
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}
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/* Remove SCI handlers */
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Status = AcpiEvRemoveAllSciHandlers ();
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if (ACPI_FAILURE(Status))
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{
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ACPI_ERROR ((AE_INFO,
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"Could not remove SCI handler"));
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}
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/* Deallocate all handler objects installed within GPE info structs */
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Status = AcpiEvWalkGpeList (AcpiEvDeleteGpeHandlers, NULL);
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/* Return to original mode if necessary */
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if (AcpiGbl_OriginalMode == ACPI_SYS_MODE_LEGACY)
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{
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Status = AcpiDisable ();
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if (ACPI_FAILURE (Status))
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{
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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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#endif /* !ACPI_REDUCED_HARDWARE */
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