975 lines
28 KiB
C
975 lines
28 KiB
C
/******************************************************************************
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*
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* Module Name: evxface - External interfaces for ACPI events
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* $Revision: 1.165 $
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*
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*****************************************************************************/
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/******************************************************************************
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*
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* 1. Copyright Notice
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*
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* Some or all of this work - Copyright (c) 1999 - 2007, Intel Corp.
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* All rights reserved.
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*
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* 2. License
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*
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* 2.1. This is your license from Intel Corp. under its intellectual property
|
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* rights. You may have additional license terms from the party that provided
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* you this software, covering your right to use that party's intellectual
|
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* property rights.
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*
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* 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
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* copy of the source code appearing in this file ("Covered Code") an
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* irrevocable, perpetual, worldwide license under Intel's copyrights in the
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* base code distributed originally by Intel ("Original Intel Code") to copy,
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* make derivatives, distribute, use and display any portion of the Covered
|
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* Code in any form, with the right to sublicense such rights; and
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*
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* 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
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* license (with the right to sublicense), under only those claims of Intel
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* patents that are infringed by the Original Intel Code, to make, use, sell,
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* offer to sell, and import the Covered Code and derivative works thereof
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* solely to the minimum extent necessary to exercise the above copyright
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|
* license, and in no event shall the patent license extend to any additions
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* to or modifications of the Original Intel Code. No other license or right
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* is granted directly or by implication, estoppel or otherwise;
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*
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* The above copyright and patent license is granted only if the following
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* conditions are met:
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*
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* 3. Conditions
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*
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* 3.1. Redistribution of Source with Rights to Further Distribute Source.
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* Redistribution of source code of any substantial portion of the Covered
|
|
* Code or modification with rights to further distribute source must include
|
|
* the above Copyright Notice, the above License, this list of Conditions,
|
|
* and the following Disclaimer and Export Compliance provision. In addition,
|
|
* Licensee must cause all Covered Code to which Licensee contributes to
|
|
* contain a file documenting the changes Licensee made to create that Covered
|
|
* Code and the date of any change. Licensee must include in that file the
|
|
* documentation of any changes made by any predecessor Licensee. Licensee
|
|
* must include a prominent statement that the modification is derived,
|
|
* directly or indirectly, from Original Intel Code.
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|
*
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|
* 3.2. Redistribution of Source with no Rights to Further Distribute Source.
|
|
* Redistribution of source code of any substantial portion of the Covered
|
|
* Code or modification without rights to further distribute source must
|
|
* include the following Disclaimer and Export Compliance provision in the
|
|
* documentation and/or other materials provided with distribution. In
|
|
* addition, Licensee may not authorize further sublicense of source of any
|
|
* portion of the Covered Code, and must include terms to the effect that the
|
|
* license from Licensee to its licensee is limited to the intellectual
|
|
* property embodied in the software Licensee provides to its licensee, and
|
|
* not to intellectual property embodied in modifications its licensee may
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|
* make.
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*
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|
* 3.3. Redistribution of Executable. Redistribution in executable form of any
|
|
* substantial portion of the Covered Code or modification must reproduce the
|
|
* above Copyright Notice, and the following Disclaimer and Export Compliance
|
|
* provision in the documentation and/or other materials provided with the
|
|
* distribution.
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*
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* 3.4. Intel retains all right, title, and interest in and to the Original
|
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* Intel Code.
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*
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* 3.5. Neither the name Intel nor any other trademark owned or controlled by
|
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* Intel shall be used in advertising or otherwise to promote the sale, use or
|
|
* other dealings in products derived from or relating to the Covered Code
|
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* without prior written authorization from Intel.
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*
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* 4. Disclaimer and Export Compliance
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*
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* 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
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* HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
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* IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE,
|
|
* INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY
|
|
* UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY
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|
* IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
|
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* PARTICULAR PURPOSE.
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*
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* 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
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* OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
|
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* COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
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* SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
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* CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
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* HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
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* SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
|
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* LIMITED REMEDY.
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*
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* 4.3. Licensee shall not export, either directly or indirectly, any of this
|
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* software or system incorporating such software without first obtaining any
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* required license or other approval from the U. S. Department of Commerce or
|
|
* any other agency or department of the United States Government. In the
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|
* event Licensee exports any such software from the United States or
|
|
* re-exports any such software from a foreign destination, Licensee shall
|
|
* ensure that the distribution and export/re-export of the software is in
|
|
* compliance with all laws, regulations, orders, or other restrictions of the
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* U.S. Export Administration Regulations. Licensee agrees that neither it nor
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* any of its subsidiaries will export/re-export any technical data, process,
|
|
* software, or service, directly or indirectly, to any country for which the
|
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* United States government or any agency thereof requires an export license,
|
|
* other governmental approval, or letter of assurance, without first obtaining
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* such license, approval or letter.
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*
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*****************************************************************************/
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#define __EVXFACE_C__
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#include <contrib/dev/acpica/acpi.h>
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#include <contrib/dev/acpica/acnamesp.h>
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#include <contrib/dev/acpica/acevents.h>
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#include <contrib/dev/acpica/acinterp.h>
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#define _COMPONENT ACPI_EVENTS
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ACPI_MODULE_NAME ("evxface")
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|
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/*******************************************************************************
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*
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* FUNCTION: AcpiInstallExceptionHandler
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*
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* PARAMETERS: Handler - Pointer to the handler function for the
|
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* event
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*
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* RETURN: Status
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*
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* DESCRIPTION: Saves the pointer to the handler function
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiInstallExceptionHandler (
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ACPI_EXCEPTION_HANDLER Handler)
|
|
{
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ACPI_STATUS Status;
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|
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ACPI_FUNCTION_TRACE (AcpiInstallExceptionHandler);
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|
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Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS);
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if (ACPI_FAILURE (Status))
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{
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return_ACPI_STATUS (Status);
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}
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/* Don't allow two handlers. */
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if (AcpiGbl_ExceptionHandler)
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{
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Status = AE_ALREADY_EXISTS;
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goto Cleanup;
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}
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/* Install the handler */
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AcpiGbl_ExceptionHandler = Handler;
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Cleanup:
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(void) AcpiUtReleaseMutex (ACPI_MTX_EVENTS);
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return_ACPI_STATUS (Status);
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}
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ACPI_EXPORT_SYMBOL (AcpiInstallExceptionHandler)
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/*******************************************************************************
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*
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* FUNCTION: AcpiInstallFixedEventHandler
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*
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|
* PARAMETERS: Event - Event type to enable.
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|
* Handler - Pointer to the handler function for the
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* event
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|
* Context - Value passed to the handler on each GPE
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*
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* RETURN: Status
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*
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* DESCRIPTION: Saves the pointer to the handler function and then enables the
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* event.
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*
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******************************************************************************/
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ACPI_STATUS
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AcpiInstallFixedEventHandler (
|
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UINT32 Event,
|
|
ACPI_EVENT_HANDLER Handler,
|
|
void *Context)
|
|
{
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|
ACPI_STATUS Status;
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|
|
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ACPI_FUNCTION_TRACE (AcpiInstallFixedEventHandler);
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|
|
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/* Parameter validation */
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if (Event > ACPI_EVENT_MAX)
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{
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return_ACPI_STATUS (AE_BAD_PARAMETER);
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}
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|
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|
Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS);
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if (ACPI_FAILURE (Status))
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|
{
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|
return_ACPI_STATUS (Status);
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|
}
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|
|
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/* Don't allow two handlers. */
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|
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if (NULL != AcpiGbl_FixedEventHandlers[Event].Handler)
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{
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Status = AE_ALREADY_EXISTS;
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goto Cleanup;
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}
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/* Install the handler before enabling the event */
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AcpiGbl_FixedEventHandlers[Event].Handler = Handler;
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AcpiGbl_FixedEventHandlers[Event].Context = Context;
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Status = AcpiEnableEvent (Event, 0);
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if (ACPI_FAILURE (Status))
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{
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ACPI_WARNING ((AE_INFO, "Could not enable fixed event %X", Event));
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/* Remove the handler */
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AcpiGbl_FixedEventHandlers[Event].Handler = NULL;
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AcpiGbl_FixedEventHandlers[Event].Context = NULL;
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}
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else
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{
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ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
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"Enabled fixed event %X, Handler=%p\n", Event, Handler));
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}
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Cleanup:
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(void) AcpiUtReleaseMutex (ACPI_MTX_EVENTS);
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return_ACPI_STATUS (Status);
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}
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ACPI_EXPORT_SYMBOL (AcpiInstallFixedEventHandler)
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|
|
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/*******************************************************************************
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*
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* FUNCTION: AcpiRemoveFixedEventHandler
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*
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|
* PARAMETERS: Event - Event type to disable.
|
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* Handler - Address of the handler
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*
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* RETURN: Status
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*
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* DESCRIPTION: Disables the event and unregisters the event handler.
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*
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******************************************************************************/
|
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ACPI_STATUS
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AcpiRemoveFixedEventHandler (
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UINT32 Event,
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ACPI_EVENT_HANDLER Handler)
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{
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ACPI_STATUS Status = AE_OK;
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|
|
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ACPI_FUNCTION_TRACE (AcpiRemoveFixedEventHandler);
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|
|
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/* Parameter validation */
|
|
|
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if (Event > ACPI_EVENT_MAX)
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{
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return_ACPI_STATUS (AE_BAD_PARAMETER);
|
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}
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Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS);
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if (ACPI_FAILURE (Status))
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{
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return_ACPI_STATUS (Status);
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}
|
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|
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/* Disable the event before removing the handler */
|
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Status = AcpiDisableEvent (Event, 0);
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|
|
/* Always Remove the handler */
|
|
|
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AcpiGbl_FixedEventHandlers[Event].Handler = NULL;
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AcpiGbl_FixedEventHandlers[Event].Context = NULL;
|
|
|
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if (ACPI_FAILURE (Status))
|
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{
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ACPI_WARNING ((AE_INFO,
|
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"Could not write to fixed event enable register %X", Event));
|
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}
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else
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{
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ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Disabled fixed event %X\n", Event));
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}
|
|
|
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(void) AcpiUtReleaseMutex (ACPI_MTX_EVENTS);
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return_ACPI_STATUS (Status);
|
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}
|
|
|
|
ACPI_EXPORT_SYMBOL (AcpiRemoveFixedEventHandler)
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiInstallNotifyHandler
|
|
*
|
|
* PARAMETERS: Device - The device for which notifies will be handled
|
|
* HandlerType - The type of handler:
|
|
* ACPI_SYSTEM_NOTIFY: SystemHandler (00-7f)
|
|
* ACPI_DEVICE_NOTIFY: DriverHandler (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: Install a handler for notifies on an ACPI device
|
|
*
|
|
******************************************************************************/
|
|
|
|
ACPI_STATUS
|
|
AcpiInstallNotifyHandler (
|
|
ACPI_HANDLE Device,
|
|
UINT32 HandlerType,
|
|
ACPI_NOTIFY_HANDLER Handler,
|
|
void *Context)
|
|
{
|
|
ACPI_OPERAND_OBJECT *ObjDesc;
|
|
ACPI_OPERAND_OBJECT *NotifyObj;
|
|
ACPI_NAMESPACE_NODE *Node;
|
|
ACPI_STATUS Status;
|
|
|
|
|
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ACPI_FUNCTION_TRACE (AcpiInstallNotifyHandler);
|
|
|
|
|
|
/* Parameter validation */
|
|
|
|
if ((!Device) ||
|
|
(!Handler) ||
|
|
(HandlerType > ACPI_MAX_NOTIFY_HANDLER_TYPE))
|
|
{
|
|
return_ACPI_STATUS (AE_BAD_PARAMETER);
|
|
}
|
|
|
|
Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
/* Convert and validate the device handle */
|
|
|
|
Node = AcpiNsMapHandleToNode (Device);
|
|
if (!Node)
|
|
{
|
|
Status = AE_BAD_PARAMETER;
|
|
goto UnlockAndExit;
|
|
}
|
|
|
|
/*
|
|
* 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)
|
|
{
|
|
/* Make sure the handler is not already installed */
|
|
|
|
if (((HandlerType & ACPI_SYSTEM_NOTIFY) &&
|
|
AcpiGbl_SystemNotify.Handler) ||
|
|
((HandlerType & ACPI_DEVICE_NOTIFY) &&
|
|
AcpiGbl_DeviceNotify.Handler))
|
|
{
|
|
Status = AE_ALREADY_EXISTS;
|
|
goto UnlockAndExit;
|
|
}
|
|
|
|
if (HandlerType & ACPI_SYSTEM_NOTIFY)
|
|
{
|
|
AcpiGbl_SystemNotify.Node = Node;
|
|
AcpiGbl_SystemNotify.Handler = Handler;
|
|
AcpiGbl_SystemNotify.Context = Context;
|
|
}
|
|
|
|
if (HandlerType & ACPI_DEVICE_NOTIFY)
|
|
{
|
|
AcpiGbl_DeviceNotify.Node = Node;
|
|
AcpiGbl_DeviceNotify.Handler = Handler;
|
|
AcpiGbl_DeviceNotify.Context = Context;
|
|
}
|
|
|
|
/* Global notify handler installed */
|
|
}
|
|
|
|
/*
|
|
* 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? */
|
|
|
|
if (!AcpiEvIsNotifyObject (Node))
|
|
{
|
|
Status = AE_TYPE;
|
|
goto UnlockAndExit;
|
|
}
|
|
|
|
/* Check for an existing internal object */
|
|
|
|
ObjDesc = AcpiNsGetAttachedObject (Node);
|
|
if (ObjDesc)
|
|
{
|
|
/* Object exists - make sure there's no handler */
|
|
|
|
if (((HandlerType & ACPI_SYSTEM_NOTIFY) &&
|
|
ObjDesc->CommonNotify.SystemNotify) ||
|
|
((HandlerType & ACPI_DEVICE_NOTIFY) &&
|
|
ObjDesc->CommonNotify.DeviceNotify))
|
|
{
|
|
Status = AE_ALREADY_EXISTS;
|
|
goto UnlockAndExit;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/* Create a new object */
|
|
|
|
ObjDesc = AcpiUtCreateInternalObject (Node->Type);
|
|
if (!ObjDesc)
|
|
{
|
|
Status = AE_NO_MEMORY;
|
|
goto UnlockAndExit;
|
|
}
|
|
|
|
/* Attach new object to the Node */
|
|
|
|
Status = AcpiNsAttachObject (Device, ObjDesc, Node->Type);
|
|
|
|
/* Remove local reference to the object */
|
|
|
|
AcpiUtRemoveReference (ObjDesc);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
goto UnlockAndExit;
|
|
}
|
|
}
|
|
|
|
/* Install the handler */
|
|
|
|
NotifyObj = AcpiUtCreateInternalObject (ACPI_TYPE_LOCAL_NOTIFY);
|
|
if (!NotifyObj)
|
|
{
|
|
Status = AE_NO_MEMORY;
|
|
goto UnlockAndExit;
|
|
}
|
|
|
|
NotifyObj->Notify.Node = Node;
|
|
NotifyObj->Notify.Handler = Handler;
|
|
NotifyObj->Notify.Context = Context;
|
|
|
|
if (HandlerType & ACPI_SYSTEM_NOTIFY)
|
|
{
|
|
ObjDesc->CommonNotify.SystemNotify = NotifyObj;
|
|
}
|
|
|
|
if (HandlerType & ACPI_DEVICE_NOTIFY)
|
|
{
|
|
ObjDesc->CommonNotify.DeviceNotify = NotifyObj;
|
|
}
|
|
|
|
if (HandlerType == ACPI_ALL_NOTIFY)
|
|
{
|
|
/* Extra ref if installed in both */
|
|
|
|
AcpiUtAddReference (NotifyObj);
|
|
}
|
|
}
|
|
|
|
|
|
UnlockAndExit:
|
|
(void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
ACPI_EXPORT_SYMBOL (AcpiInstallNotifyHandler)
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiRemoveNotifyHandler
|
|
*
|
|
* PARAMETERS: Device - The device for which notifies will be handled
|
|
* HandlerType - The type of handler:
|
|
* ACPI_SYSTEM_NOTIFY: SystemHandler (00-7f)
|
|
* ACPI_DEVICE_NOTIFY: DriverHandler (80-ff)
|
|
* ACPI_ALL_NOTIFY: both system and device
|
|
* Handler - Address of the handler
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Remove a handler for notifies on an ACPI device
|
|
*
|
|
******************************************************************************/
|
|
|
|
ACPI_STATUS
|
|
AcpiRemoveNotifyHandler (
|
|
ACPI_HANDLE Device,
|
|
UINT32 HandlerType,
|
|
ACPI_NOTIFY_HANDLER Handler)
|
|
{
|
|
ACPI_OPERAND_OBJECT *NotifyObj;
|
|
ACPI_OPERAND_OBJECT *ObjDesc;
|
|
ACPI_NAMESPACE_NODE *Node;
|
|
ACPI_STATUS Status;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE (AcpiRemoveNotifyHandler);
|
|
|
|
|
|
/* Parameter validation */
|
|
|
|
if ((!Device) ||
|
|
(!Handler) ||
|
|
(HandlerType > ACPI_MAX_NOTIFY_HANDLER_TYPE))
|
|
{
|
|
return_ACPI_STATUS (AE_BAD_PARAMETER);
|
|
}
|
|
|
|
Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
/* Convert and validate the device handle */
|
|
|
|
Node = AcpiNsMapHandleToNode (Device);
|
|
if (!Node)
|
|
{
|
|
Status = AE_BAD_PARAMETER;
|
|
goto UnlockAndExit;
|
|
}
|
|
|
|
/* Root Object */
|
|
|
|
if (Device == ACPI_ROOT_OBJECT)
|
|
{
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_INFO,
|
|
"Removing notify handler for namespace root object\n"));
|
|
|
|
if (((HandlerType & ACPI_SYSTEM_NOTIFY) &&
|
|
!AcpiGbl_SystemNotify.Handler) ||
|
|
((HandlerType & ACPI_DEVICE_NOTIFY) &&
|
|
!AcpiGbl_DeviceNotify.Handler))
|
|
{
|
|
Status = AE_NOT_EXIST;
|
|
goto UnlockAndExit;
|
|
}
|
|
|
|
if (HandlerType & ACPI_SYSTEM_NOTIFY)
|
|
{
|
|
AcpiGbl_SystemNotify.Node = NULL;
|
|
AcpiGbl_SystemNotify.Handler = NULL;
|
|
AcpiGbl_SystemNotify.Context = NULL;
|
|
}
|
|
|
|
if (HandlerType & ACPI_DEVICE_NOTIFY)
|
|
{
|
|
AcpiGbl_DeviceNotify.Node = NULL;
|
|
AcpiGbl_DeviceNotify.Handler = NULL;
|
|
AcpiGbl_DeviceNotify.Context = NULL;
|
|
}
|
|
}
|
|
|
|
/* All Other Objects */
|
|
|
|
else
|
|
{
|
|
/* Notifies allowed on this object? */
|
|
|
|
if (!AcpiEvIsNotifyObject (Node))
|
|
{
|
|
Status = AE_TYPE;
|
|
goto UnlockAndExit;
|
|
}
|
|
|
|
/* Check for an existing internal object */
|
|
|
|
ObjDesc = AcpiNsGetAttachedObject (Node);
|
|
if (!ObjDesc)
|
|
{
|
|
Status = AE_NOT_EXIST;
|
|
goto UnlockAndExit;
|
|
}
|
|
|
|
/* Object exists - make sure there's an existing handler */
|
|
|
|
if (HandlerType & ACPI_SYSTEM_NOTIFY)
|
|
{
|
|
NotifyObj = ObjDesc->CommonNotify.SystemNotify;
|
|
if (!NotifyObj)
|
|
{
|
|
Status = AE_NOT_EXIST;
|
|
goto UnlockAndExit;
|
|
}
|
|
|
|
if (NotifyObj->Notify.Handler != Handler)
|
|
{
|
|
Status = AE_BAD_PARAMETER;
|
|
goto UnlockAndExit;
|
|
}
|
|
|
|
/* Remove the handler */
|
|
|
|
ObjDesc->CommonNotify.SystemNotify = NULL;
|
|
AcpiUtRemoveReference (NotifyObj);
|
|
}
|
|
|
|
if (HandlerType & ACPI_DEVICE_NOTIFY)
|
|
{
|
|
NotifyObj = ObjDesc->CommonNotify.DeviceNotify;
|
|
if (!NotifyObj)
|
|
{
|
|
Status = AE_NOT_EXIST;
|
|
goto UnlockAndExit;
|
|
}
|
|
|
|
if (NotifyObj->Notify.Handler != Handler)
|
|
{
|
|
Status = AE_BAD_PARAMETER;
|
|
goto UnlockAndExit;
|
|
}
|
|
|
|
/* Remove the handler */
|
|
|
|
ObjDesc->CommonNotify.DeviceNotify = NULL;
|
|
AcpiUtRemoveReference (NotifyObj);
|
|
}
|
|
}
|
|
|
|
|
|
UnlockAndExit:
|
|
(void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
ACPI_EXPORT_SYMBOL (AcpiRemoveNotifyHandler)
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiInstallGpeHandler
|
|
*
|
|
* PARAMETERS: GpeDevice - Namespace node for the GPE (NULL for FADT
|
|
* defined GPEs)
|
|
* GpeNumber - The GPE number within the GPE block
|
|
* 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
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Install a handler for a General Purpose Event.
|
|
*
|
|
******************************************************************************/
|
|
|
|
ACPI_STATUS
|
|
AcpiInstallGpeHandler (
|
|
ACPI_HANDLE GpeDevice,
|
|
UINT32 GpeNumber,
|
|
UINT32 Type,
|
|
ACPI_EVENT_HANDLER Address,
|
|
void *Context)
|
|
{
|
|
ACPI_GPE_EVENT_INFO *GpeEventInfo;
|
|
ACPI_HANDLER_INFO *Handler;
|
|
ACPI_STATUS Status;
|
|
ACPI_CPU_FLAGS Flags;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE (AcpiInstallGpeHandler);
|
|
|
|
|
|
/* Parameter validation */
|
|
|
|
if ((!Address) || (Type > ACPI_GPE_XRUPT_TYPE_MASK))
|
|
{
|
|
return_ACPI_STATUS (AE_BAD_PARAMETER);
|
|
}
|
|
|
|
Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
/* Ensure that we have a valid GPE number */
|
|
|
|
GpeEventInfo = AcpiEvGetGpeEventInfo (GpeDevice, GpeNumber);
|
|
if (!GpeEventInfo)
|
|
{
|
|
Status = AE_BAD_PARAMETER;
|
|
goto UnlockAndExit;
|
|
}
|
|
|
|
/* Make sure that there isn't a handler there already */
|
|
|
|
if ((GpeEventInfo->Flags & ACPI_GPE_DISPATCH_MASK) == ACPI_GPE_DISPATCH_HANDLER)
|
|
{
|
|
Status = AE_ALREADY_EXISTS;
|
|
goto UnlockAndExit;
|
|
}
|
|
|
|
/* Allocate and init handler object */
|
|
|
|
Handler = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_HANDLER_INFO));
|
|
if (!Handler)
|
|
{
|
|
Status = AE_NO_MEMORY;
|
|
goto UnlockAndExit;
|
|
}
|
|
|
|
Handler->Address = Address;
|
|
Handler->Context = Context;
|
|
Handler->MethodNode = GpeEventInfo->Dispatch.MethodNode;
|
|
|
|
/* Disable the GPE before installing the handler */
|
|
|
|
Status = AcpiEvDisableGpe (GpeEventInfo);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
goto UnlockAndExit;
|
|
}
|
|
|
|
/* Install the handler */
|
|
|
|
Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock);
|
|
GpeEventInfo->Dispatch.Handler = Handler;
|
|
|
|
/* Setup up dispatch flags to indicate handler (vs. method) */
|
|
|
|
GpeEventInfo->Flags &= ~(ACPI_GPE_XRUPT_TYPE_MASK | ACPI_GPE_DISPATCH_MASK); /* Clear bits */
|
|
GpeEventInfo->Flags |= (UINT8) (Type | ACPI_GPE_DISPATCH_HANDLER);
|
|
|
|
AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);
|
|
|
|
|
|
UnlockAndExit:
|
|
(void) AcpiUtReleaseMutex (ACPI_MTX_EVENTS);
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
ACPI_EXPORT_SYMBOL (AcpiInstallGpeHandler)
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiRemoveGpeHandler
|
|
*
|
|
* PARAMETERS: GpeDevice - Namespace node for the GPE (NULL for FADT
|
|
* defined GPEs)
|
|
* GpeNumber - The event to remove a handler
|
|
* Address - Address of the handler
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Remove a handler for a General Purpose AcpiEvent.
|
|
*
|
|
******************************************************************************/
|
|
|
|
ACPI_STATUS
|
|
AcpiRemoveGpeHandler (
|
|
ACPI_HANDLE GpeDevice,
|
|
UINT32 GpeNumber,
|
|
ACPI_EVENT_HANDLER Address)
|
|
{
|
|
ACPI_GPE_EVENT_INFO *GpeEventInfo;
|
|
ACPI_HANDLER_INFO *Handler;
|
|
ACPI_STATUS Status;
|
|
ACPI_CPU_FLAGS Flags;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE (AcpiRemoveGpeHandler);
|
|
|
|
|
|
/* Parameter validation */
|
|
|
|
if (!Address)
|
|
{
|
|
return_ACPI_STATUS (AE_BAD_PARAMETER);
|
|
}
|
|
|
|
Status = AcpiUtAcquireMutex (ACPI_MTX_EVENTS);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
/* Ensure that we have a valid GPE number */
|
|
|
|
GpeEventInfo = AcpiEvGetGpeEventInfo (GpeDevice, GpeNumber);
|
|
if (!GpeEventInfo)
|
|
{
|
|
Status = AE_BAD_PARAMETER;
|
|
goto UnlockAndExit;
|
|
}
|
|
|
|
/* Make sure that a handler is indeed installed */
|
|
|
|
if ((GpeEventInfo->Flags & ACPI_GPE_DISPATCH_MASK) != ACPI_GPE_DISPATCH_HANDLER)
|
|
{
|
|
Status = AE_NOT_EXIST;
|
|
goto UnlockAndExit;
|
|
}
|
|
|
|
/* Make sure that the installed handler is the same */
|
|
|
|
if (GpeEventInfo->Dispatch.Handler->Address != Address)
|
|
{
|
|
Status = AE_BAD_PARAMETER;
|
|
goto UnlockAndExit;
|
|
}
|
|
|
|
/* Disable the GPE before removing the handler */
|
|
|
|
Status = AcpiEvDisableGpe (GpeEventInfo);
|
|
if (ACPI_FAILURE (Status))
|
|
{
|
|
goto UnlockAndExit;
|
|
}
|
|
|
|
/* Remove the handler */
|
|
|
|
Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock);
|
|
Handler = GpeEventInfo->Dispatch.Handler;
|
|
|
|
/* Restore Method node (if any), set dispatch flags */
|
|
|
|
GpeEventInfo->Dispatch.MethodNode = Handler->MethodNode;
|
|
GpeEventInfo->Flags &= ~ACPI_GPE_DISPATCH_MASK; /* Clear bits */
|
|
if (Handler->MethodNode)
|
|
{
|
|
GpeEventInfo->Flags |= ACPI_GPE_DISPATCH_METHOD;
|
|
}
|
|
AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);
|
|
|
|
/* Now we can free the handler object */
|
|
|
|
ACPI_FREE (Handler);
|
|
|
|
|
|
UnlockAndExit:
|
|
(void) AcpiUtReleaseMutex (ACPI_MTX_EVENTS);
|
|
return_ACPI_STATUS (Status);
|
|
}
|
|
|
|
ACPI_EXPORT_SYMBOL (AcpiRemoveGpeHandler)
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiAcquireGlobalLock
|
|
*
|
|
* PARAMETERS: Timeout - How long the caller is willing to wait
|
|
* Handle - Where the handle to the lock is returned
|
|
* (if acquired)
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Acquire the ACPI Global Lock
|
|
*
|
|
* Note: Allows callers with the same thread ID to acquire the global lock
|
|
* multiple times. In other words, externally, the behavior of the global lock
|
|
* is identical to an AML mutex. On the first acquire, a new handle is
|
|
* returned. On any subsequent calls to acquire by the same thread, the same
|
|
* handle is returned.
|
|
*
|
|
******************************************************************************/
|
|
|
|
ACPI_STATUS
|
|
AcpiAcquireGlobalLock (
|
|
UINT16 Timeout,
|
|
UINT32 *Handle)
|
|
{
|
|
ACPI_STATUS Status;
|
|
|
|
|
|
if (!Handle)
|
|
{
|
|
return (AE_BAD_PARAMETER);
|
|
}
|
|
|
|
/* Must lock interpreter to prevent race conditions */
|
|
|
|
AcpiExEnterInterpreter ();
|
|
|
|
Status = AcpiExAcquireMutexObject (Timeout,
|
|
AcpiGbl_GlobalLockMutex, AcpiOsGetThreadId ());
|
|
|
|
if (ACPI_SUCCESS (Status))
|
|
{
|
|
/*
|
|
* If this was the first acquisition of the Global Lock by this thread,
|
|
* create a new handle. Otherwise, return the existing handle.
|
|
*/
|
|
if (AcpiGbl_GlobalLockMutex->Mutex.AcquisitionDepth == 1)
|
|
{
|
|
AcpiGbl_GlobalLockHandle++;
|
|
}
|
|
|
|
/* Return the global lock handle */
|
|
|
|
*Handle = AcpiGbl_GlobalLockHandle;
|
|
}
|
|
|
|
AcpiExExitInterpreter ();
|
|
return (Status);
|
|
}
|
|
|
|
ACPI_EXPORT_SYMBOL (AcpiAcquireGlobalLock)
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: AcpiReleaseGlobalLock
|
|
*
|
|
* PARAMETERS: Handle - Returned from AcpiAcquireGlobalLock
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Release the ACPI Global Lock. The handle must be valid.
|
|
*
|
|
******************************************************************************/
|
|
|
|
ACPI_STATUS
|
|
AcpiReleaseGlobalLock (
|
|
UINT32 Handle)
|
|
{
|
|
ACPI_STATUS Status;
|
|
|
|
|
|
if (!Handle || (Handle != AcpiGbl_GlobalLockHandle))
|
|
{
|
|
return (AE_NOT_ACQUIRED);
|
|
}
|
|
|
|
Status = AcpiExReleaseMutexObject (AcpiGbl_GlobalLockMutex);
|
|
return (Status);
|
|
}
|
|
|
|
ACPI_EXPORT_SYMBOL (AcpiReleaseGlobalLock)
|
|
|