/******************************************************************************
*
* Module Name: evgpeutil - GPE utilities
*
*****************************************************************************/
/******************************************************************************
*
* 1. Copyright Notice
*
* Some or all of this work - Copyright (c) 1999 - 2011, Intel Corp.
* All rights reserved.
*
* 2. License
*
* 2.1. This is your license from Intel Corp. under its intellectual property
* rights. You may have additional license terms from the party that provided
* you this software, covering your right to use that party's intellectual
* property rights.
*
* 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a
* copy of the source code appearing in this file ("Covered Code") an
* irrevocable, perpetual, worldwide license under Intel's copyrights in the
* base code distributed originally by Intel ("Original Intel Code") to copy,
* make derivatives, distribute, use and display any portion of the Covered
* Code in any form, with the right to sublicense such rights; and
*
* 2.3. Intel grants Licensee a non-exclusive and non-transferable patent
* license (with the right to sublicense), under only those claims of Intel
* patents that are infringed by the Original Intel Code, to make, use, sell,
* offer to sell, and import the Covered Code and derivative works thereof
* solely to the minimum extent necessary to exercise the above copyright
* license, and in no event shall the patent license extend to any additions
* to or modifications of the Original Intel Code. No other license or right
* is granted directly or by implication, estoppel or otherwise;
*
* The above copyright and patent license is granted only if the following
* conditions are met:
*
* 3. Conditions
*
* 3.1. Redistribution of Source with Rights to Further Distribute Source.
* 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.
*
* 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
* make.
*
* 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.
*
* 3.4. Intel retains all right, title, and interest in and to the Original
* Intel Code.
*
* 3.5. Neither the name Intel nor any other trademark owned or controlled by
* 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
* without prior written authorization from Intel.
*
* 4. Disclaimer and Export Compliance
*
* 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED
* HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE
* 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
* IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A
* PARTICULAR PURPOSE.
*
* 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES
* OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR
* COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT,
* SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY
* CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL
* HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS
* SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY
* LIMITED REMEDY.
*
* 4.3. Licensee shall not export, either directly or indirectly, any of this
* software or system incorporating such software without first obtaining any
* 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
* 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
* U.S. Export Administration Regulations. Licensee agrees that neither it nor
* any of its subsidiaries will export/re-export any technical data, process,
* software, or service, directly or indirectly, to any country for which the
* United States government or any agency thereof requires an export license,
* other governmental approval, or letter of assurance, without first obtaining
* such license, approval or letter.
*
*****************************************************************************/
#include "acpi.h"
#include "accommon.h"
#include "acevents.h"
#define _COMPONENT ACPI_EVENTS
ACPI_MODULE_NAME ("evgpeutil")
/*******************************************************************************
*
* FUNCTION: AcpiEvWalkGpeList
*
* PARAMETERS: GpeWalkCallback - Routine called for each GPE block
* Context - Value passed to callback
*
* RETURN: Status
*
* DESCRIPTION: Walk the GPE lists.
*
******************************************************************************/
ACPI_STATUS
AcpiEvWalkGpeList (
ACPI_GPE_CALLBACK GpeWalkCallback,
void *Context)
{
ACPI_GPE_BLOCK_INFO *GpeBlock;
ACPI_GPE_XRUPT_INFO *GpeXruptInfo;
ACPI_STATUS Status = AE_OK;
ACPI_CPU_FLAGS Flags;
ACPI_FUNCTION_TRACE (EvWalkGpeList);
Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock);
/* Walk the interrupt level descriptor list */
GpeXruptInfo = AcpiGbl_GpeXruptListHead;
while (GpeXruptInfo)
{
/* Walk all Gpe Blocks attached to this interrupt level */
GpeBlock = GpeXruptInfo->GpeBlockListHead;
while (GpeBlock)
{
/* One callback per GPE block */
Status = GpeWalkCallback (GpeXruptInfo, GpeBlock, Context);
if (ACPI_FAILURE (Status))
{
if (Status == AE_CTRL_END) /* Callback abort */
{
Status = AE_OK;
}
goto UnlockAndExit;
}
GpeBlock = GpeBlock->Next;
}
GpeXruptInfo = GpeXruptInfo->Next;
}
UnlockAndExit:
AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);
return_ACPI_STATUS (Status);
}
/*******************************************************************************
*
* FUNCTION: AcpiEvValidGpeEvent
*
* PARAMETERS: GpeEventInfo - Info for this GPE
*
* RETURN: TRUE if the GpeEvent is valid
*
* DESCRIPTION: Validate a GPE event. DO NOT CALL FROM INTERRUPT LEVEL.
* Should be called only when the GPE lists are semaphore locked
* and not subject to change.
*
******************************************************************************/
BOOLEAN
AcpiEvValidGpeEvent (
ACPI_GPE_EVENT_INFO *GpeEventInfo)
{
ACPI_GPE_XRUPT_INFO *GpeXruptBlock;
ACPI_GPE_BLOCK_INFO *GpeBlock;
ACPI_FUNCTION_ENTRY ();
/* No need for spin lock since we are not changing any list elements */
/* Walk the GPE interrupt levels */
GpeXruptBlock = AcpiGbl_GpeXruptListHead;
while (GpeXruptBlock)
{
GpeBlock = GpeXruptBlock->GpeBlockListHead;
/* Walk the GPE blocks on this interrupt level */
while (GpeBlock)
{
if ((&GpeBlock->EventInfo[0] <= GpeEventInfo) &&
(&GpeBlock->EventInfo[GpeBlock->GpeCount] > GpeEventInfo))
{
return (TRUE);
}
GpeBlock = GpeBlock->Next;
}
GpeXruptBlock = GpeXruptBlock->Next;
}
return (FALSE);
}
/*******************************************************************************
*
* FUNCTION: AcpiEvGetGpeDevice
*
* PARAMETERS: GPE_WALK_CALLBACK
*
* RETURN: Status
*
* DESCRIPTION: Matches the input GPE index (0-CurrentGpeCount) with a GPE
* block device. NULL if the GPE is one of the FADT-defined GPEs.
*
******************************************************************************/
ACPI_STATUS
AcpiEvGetGpeDevice (
ACPI_GPE_XRUPT_INFO *GpeXruptInfo,
ACPI_GPE_BLOCK_INFO *GpeBlock,
void *Context)
{
ACPI_GPE_DEVICE_INFO *Info = Context;
/* Increment Index by the number of GPEs in this block */
Info->NextBlockBaseIndex += GpeBlock->GpeCount;
if (Info->Index < Info->NextBlockBaseIndex)
{
/*
* The GPE index is within this block, get the node. Leave the node
* NULL for the FADT-defined GPEs
*/
if ((GpeBlock->Node)->Type == ACPI_TYPE_DEVICE)
{
Info->GpeDevice = GpeBlock->Node;
}
Info->Status = AE_OK;
return (AE_CTRL_END);
}
return (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: AcpiEvGetGpeXruptBlock
*
* PARAMETERS: InterruptNumber - Interrupt for a GPE block
*
* RETURN: A GPE interrupt block
*
* DESCRIPTION: Get or Create a GPE interrupt block. There is one interrupt
* block per unique interrupt level used for GPEs. Should be
* called only when the GPE lists are semaphore locked and not
* subject to change.
*
******************************************************************************/
ACPI_GPE_XRUPT_INFO *
AcpiEvGetGpeXruptBlock (
UINT32 InterruptNumber)
{
ACPI_GPE_XRUPT_INFO *NextGpeXrupt;
ACPI_GPE_XRUPT_INFO *GpeXrupt;
ACPI_STATUS Status;
ACPI_CPU_FLAGS Flags;
ACPI_FUNCTION_TRACE (EvGetGpeXruptBlock);
/* No need for lock since we are not changing any list elements here */
NextGpeXrupt = AcpiGbl_GpeXruptListHead;
while (NextGpeXrupt)
{
if (NextGpeXrupt->InterruptNumber == InterruptNumber)
{
return_PTR (NextGpeXrupt);
}
NextGpeXrupt = NextGpeXrupt->Next;
}
/* Not found, must allocate a new xrupt descriptor */
GpeXrupt = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_GPE_XRUPT_INFO));
if (!GpeXrupt)
{
return_PTR (NULL);
}
GpeXrupt->InterruptNumber = InterruptNumber;
/* Install new interrupt descriptor with spin lock */
Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock);
if (AcpiGbl_GpeXruptListHead)
{
NextGpeXrupt = AcpiGbl_GpeXruptListHead;
while (NextGpeXrupt->Next)
{
NextGpeXrupt = NextGpeXrupt->Next;
}
NextGpeXrupt->Next = GpeXrupt;
GpeXrupt->Previous = NextGpeXrupt;
}
else
{
AcpiGbl_GpeXruptListHead = GpeXrupt;
}
AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);
/* Install new interrupt handler if not SCI_INT */
if (InterruptNumber != AcpiGbl_FADT.SciInterrupt)
{
Status = AcpiOsInstallInterruptHandler (InterruptNumber,
AcpiEvGpeXruptHandler, GpeXrupt);
if (ACPI_FAILURE (Status))
{
ACPI_ERROR ((AE_INFO,
"Could not install GPE interrupt handler at level 0x%X",
InterruptNumber));
return_PTR (NULL);
}
}
return_PTR (GpeXrupt);
}
/*******************************************************************************
*
* FUNCTION: AcpiEvDeleteGpeXrupt
*
* PARAMETERS: GpeXrupt - A GPE interrupt info block
*
* RETURN: Status
*
* DESCRIPTION: Remove and free a GpeXrupt block. Remove an associated
* interrupt handler if not the SCI interrupt.
*
******************************************************************************/
ACPI_STATUS
AcpiEvDeleteGpeXrupt (
ACPI_GPE_XRUPT_INFO *GpeXrupt)
{
ACPI_STATUS Status;
ACPI_CPU_FLAGS Flags;
ACPI_FUNCTION_TRACE (EvDeleteGpeXrupt);
/* We never want to remove the SCI interrupt handler */
if (GpeXrupt->InterruptNumber == AcpiGbl_FADT.SciInterrupt)
{
GpeXrupt->GpeBlockListHead = NULL;
return_ACPI_STATUS (AE_OK);
}
/* Disable this interrupt */
Status = AcpiOsRemoveInterruptHandler (
GpeXrupt->InterruptNumber, AcpiEvGpeXruptHandler);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
/* Unlink the interrupt block with lock */
Flags = AcpiOsAcquireLock (AcpiGbl_GpeLock);
if (GpeXrupt->Previous)
{
GpeXrupt->Previous->Next = GpeXrupt->Next;
}
else
{
/* No previous, update list head */
AcpiGbl_GpeXruptListHead = GpeXrupt->Next;
}
if (GpeXrupt->Next)
{
GpeXrupt->Next->Previous = GpeXrupt->Previous;
}
AcpiOsReleaseLock (AcpiGbl_GpeLock, Flags);
/* Free the block */
ACPI_FREE (GpeXrupt);
return_ACPI_STATUS (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: AcpiEvDeleteGpeHandlers
*
* PARAMETERS: GpeXruptInfo - GPE Interrupt info
* GpeBlock - Gpe Block info
*
* RETURN: Status
*
* DESCRIPTION: Delete all Handler objects found in the GPE data structs.
* Used only prior to termination.
*
******************************************************************************/
ACPI_STATUS
AcpiEvDeleteGpeHandlers (
ACPI_GPE_XRUPT_INFO *GpeXruptInfo,
ACPI_GPE_BLOCK_INFO *GpeBlock,
void *Context)
{
ACPI_GPE_EVENT_INFO *GpeEventInfo;
UINT32 i;
UINT32 j;
ACPI_FUNCTION_TRACE (EvDeleteGpeHandlers);
/* Examine each GPE Register within the block */
for (i = 0; i < GpeBlock->RegisterCount; i++)
{
/* Now look at the individual GPEs in this byte register */
for (j = 0; j < ACPI_GPE_REGISTER_WIDTH; j++)
{
GpeEventInfo = &GpeBlock->EventInfo[((ACPI_SIZE) i *
ACPI_GPE_REGISTER_WIDTH) + j];
if ((GpeEventInfo->Flags & ACPI_GPE_DISPATCH_MASK) ==
ACPI_GPE_DISPATCH_HANDLER)
{
ACPI_FREE (GpeEventInfo->Dispatch.Handler);
GpeEventInfo->Dispatch.Handler = NULL;
GpeEventInfo->Flags &= ~ACPI_GPE_DISPATCH_MASK;
}
}
}
return_ACPI_STATUS (AE_OK);
}