/******************************************************************************
*
* Module Name: evregion - ACPI AddressSpace (OpRegion) handler dispatch
*
*****************************************************************************/
/******************************************************************************
*
* 1. Copyright Notice
*
* Some or all of this work - Copyright (c) 1999 - 2010, 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.
*
*****************************************************************************/
#define __EVREGION_C__
#include "acpi.h"
#include "accommon.h"
#include "acevents.h"
#include "acnamesp.h"
#include "acinterp.h"
#define _COMPONENT ACPI_EVENTS
ACPI_MODULE_NAME ("evregion")
/* Local prototypes */
static BOOLEAN
AcpiEvHasDefaultHandler (
ACPI_NAMESPACE_NODE *Node,
ACPI_ADR_SPACE_TYPE SpaceId);
static ACPI_STATUS
AcpiEvRegRun (
ACPI_HANDLE ObjHandle,
UINT32 Level,
void *Context,
void **ReturnValue);
static ACPI_STATUS
AcpiEvInstallHandler (
ACPI_HANDLE ObjHandle,
UINT32 Level,
void *Context,
void **ReturnValue);
/* These are the address spaces that will get default handlers */
#define ACPI_NUM_DEFAULT_SPACES 4
static UINT8 AcpiGbl_DefaultAddressSpaces[ACPI_NUM_DEFAULT_SPACES] =
{
ACPI_ADR_SPACE_SYSTEM_MEMORY,
ACPI_ADR_SPACE_SYSTEM_IO,
ACPI_ADR_SPACE_PCI_CONFIG,
ACPI_ADR_SPACE_DATA_TABLE
};
/*******************************************************************************
*
* FUNCTION: AcpiEvInstallRegionHandlers
*
* PARAMETERS: None
*
* RETURN: Status
*
* DESCRIPTION: Installs the core subsystem default address space handlers.
*
******************************************************************************/
ACPI_STATUS
AcpiEvInstallRegionHandlers (
void)
{
ACPI_STATUS Status;
UINT32 i;
ACPI_FUNCTION_TRACE (EvInstallRegionHandlers);
Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
/*
* All address spaces (PCI Config, EC, SMBus) are scope dependent and
* registration must occur for a specific device.
*
* In the case of the system memory and IO address spaces there is
* currently no device associated with the address space. For these we
* use the root.
*
* We install the default PCI config space handler at the root so that
* this space is immediately available even though the we have not
* enumerated all the PCI Root Buses yet. This is to conform to the ACPI
* specification which states that the PCI config space must be always
* available -- even though we are nowhere near ready to find the PCI root
* buses at this point.
*
* NOTE: We ignore AE_ALREADY_EXISTS because this means that a handler
* has already been installed (via AcpiInstallAddressSpaceHandler).
* Similar for AE_SAME_HANDLER.
*/
for (i = 0; i < ACPI_NUM_DEFAULT_SPACES; i++)
{
Status = AcpiEvInstallSpaceHandler (AcpiGbl_RootNode,
AcpiGbl_DefaultAddressSpaces[i],
ACPI_DEFAULT_HANDLER, NULL, NULL);
switch (Status)
{
case AE_OK:
case AE_SAME_HANDLER:
case AE_ALREADY_EXISTS:
/* These exceptions are all OK */
Status = AE_OK;
break;
default:
goto UnlockAndExit;
}
}
UnlockAndExit:
(void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
return_ACPI_STATUS (Status);
}
/*******************************************************************************
*
* FUNCTION: AcpiEvHasDefaultHandler
*
* PARAMETERS: Node - Namespace node for the device
* SpaceId - The address space ID
*
* RETURN: TRUE if default handler is installed, FALSE otherwise
*
* DESCRIPTION: Check if the default handler is installed for the requested
* space ID.
*
******************************************************************************/
static BOOLEAN
AcpiEvHasDefaultHandler (
ACPI_NAMESPACE_NODE *Node,
ACPI_ADR_SPACE_TYPE SpaceId)
{
ACPI_OPERAND_OBJECT *ObjDesc;
ACPI_OPERAND_OBJECT *HandlerObj;
/* Must have an existing internal object */
ObjDesc = AcpiNsGetAttachedObject (Node);
if (ObjDesc)
{
HandlerObj = ObjDesc->Device.Handler;
/* Walk the linked list of handlers for this object */
while (HandlerObj)
{
if (HandlerObj->AddressSpace.SpaceId == SpaceId)
{
if (HandlerObj->AddressSpace.HandlerFlags &
ACPI_ADDR_HANDLER_DEFAULT_INSTALLED)
{
return (TRUE);
}
}
HandlerObj = HandlerObj->AddressSpace.Next;
}
}
return (FALSE);
}
/*******************************************************************************
*
* FUNCTION: AcpiEvInitializeOpRegions
*
* PARAMETERS: None
*
* RETURN: Status
*
* DESCRIPTION: Execute _REG methods for all Operation Regions that have
* an installed default region handler.
*
******************************************************************************/
ACPI_STATUS
AcpiEvInitializeOpRegions (
void)
{
ACPI_STATUS Status;
UINT32 i;
ACPI_FUNCTION_TRACE (EvInitializeOpRegions);
Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
/* Run the _REG methods for OpRegions in each default address space */
for (i = 0; i < ACPI_NUM_DEFAULT_SPACES; i++)
{
/*
* Make sure the installed handler is the DEFAULT handler. If not the
* default, the _REG methods will have already been run (when the
* handler was installed)
*/
if (AcpiEvHasDefaultHandler (AcpiGbl_RootNode,
AcpiGbl_DefaultAddressSpaces[i]))
{
Status = AcpiEvExecuteRegMethods (AcpiGbl_RootNode,
AcpiGbl_DefaultAddressSpaces[i]);
}
}
(void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
return_ACPI_STATUS (Status);
}
/*******************************************************************************
*
* FUNCTION: AcpiEvExecuteRegMethod
*
* PARAMETERS: RegionObj - Region object
* Function - Passed to _REG: On (1) or Off (0)
*
* RETURN: Status
*
* DESCRIPTION: Execute _REG method for a region
*
******************************************************************************/
ACPI_STATUS
AcpiEvExecuteRegMethod (
ACPI_OPERAND_OBJECT *RegionObj,
UINT32 Function)
{
ACPI_EVALUATE_INFO *Info;
ACPI_OPERAND_OBJECT *Args[3];
ACPI_OPERAND_OBJECT *RegionObj2;
ACPI_STATUS Status;
ACPI_FUNCTION_TRACE (EvExecuteRegMethod);
RegionObj2 = AcpiNsGetSecondaryObject (RegionObj);
if (!RegionObj2)
{
return_ACPI_STATUS (AE_NOT_EXIST);
}
if (RegionObj2->Extra.Method_REG == NULL)
{
return_ACPI_STATUS (AE_OK);
}
/* Allocate and initialize the evaluation information block */
Info = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_EVALUATE_INFO));
if (!Info)
{
return_ACPI_STATUS (AE_NO_MEMORY);
}
Info->PrefixNode = RegionObj2->Extra.Method_REG;
Info->Pathname = NULL;
Info->Parameters = Args;
Info->Flags = ACPI_IGNORE_RETURN_VALUE;
/*
* The _REG method has two arguments:
*
* Arg0 - Integer:
* Operation region space ID Same value as RegionObj->Region.SpaceId
*
* Arg1 - Integer:
* connection status 1 for connecting the handler, 0 for disconnecting
* the handler (Passed as a parameter)
*/
Args[0] = AcpiUtCreateIntegerObject ((UINT64) RegionObj->Region.SpaceId);
if (!Args[0])
{
Status = AE_NO_MEMORY;
goto Cleanup1;
}
Args[1] = AcpiUtCreateIntegerObject ((UINT64) Function);
if (!Args[1])
{
Status = AE_NO_MEMORY;
goto Cleanup2;
}
Args[2] = NULL; /* Terminate list */
/* Execute the method, no return value */
ACPI_DEBUG_EXEC (
AcpiUtDisplayInitPathname (ACPI_TYPE_METHOD, Info->PrefixNode, NULL));
Status = AcpiNsEvaluate (Info);
AcpiUtRemoveReference (Args[1]);
Cleanup2:
AcpiUtRemoveReference (Args[0]);
Cleanup1:
ACPI_FREE (Info);
return_ACPI_STATUS (Status);
}
/*******************************************************************************
*
* FUNCTION: AcpiEvAddressSpaceDispatch
*
* PARAMETERS: RegionObj - Internal region object
* Function - Read or Write operation
* RegionOffset - Where in the region to read or write
* BitWidth - Field width in bits (8, 16, 32, or 64)
* Value - Pointer to in or out value, must be
* a full 64-bit integer
*
* RETURN: Status
*
* DESCRIPTION: Dispatch an address space or operation region access to
* a previously installed handler.
*
******************************************************************************/
ACPI_STATUS
AcpiEvAddressSpaceDispatch (
ACPI_OPERAND_OBJECT *RegionObj,
UINT32 Function,
UINT32 RegionOffset,
UINT32 BitWidth,
UINT64 *Value)
{
ACPI_STATUS Status;
ACPI_ADR_SPACE_HANDLER Handler;
ACPI_ADR_SPACE_SETUP RegionSetup;
ACPI_OPERAND_OBJECT *HandlerDesc;
ACPI_OPERAND_OBJECT *RegionObj2;
void *RegionContext = NULL;
ACPI_FUNCTION_TRACE (EvAddressSpaceDispatch);
RegionObj2 = AcpiNsGetSecondaryObject (RegionObj);
if (!RegionObj2)
{
return_ACPI_STATUS (AE_NOT_EXIST);
}
/* Ensure that there is a handler associated with this region */
HandlerDesc = RegionObj->Region.Handler;
if (!HandlerDesc)
{
ACPI_ERROR ((AE_INFO,
"No handler for Region [%4.4s] (%p) [%s]",
AcpiUtGetNodeName (RegionObj->Region.Node),
RegionObj, AcpiUtGetRegionName (RegionObj->Region.SpaceId)));
return_ACPI_STATUS (AE_NOT_EXIST);
}
/*
* It may be the case that the region has never been initialized.
* Some types of regions require special init code
*/
if (!(RegionObj->Region.Flags & AOPOBJ_SETUP_COMPLETE))
{
/* This region has not been initialized yet, do it */
RegionSetup = HandlerDesc->AddressSpace.Setup;
if (!RegionSetup)
{
/* No initialization routine, exit with error */
ACPI_ERROR ((AE_INFO,
"No init routine for region(%p) [%s]",
RegionObj, AcpiUtGetRegionName (RegionObj->Region.SpaceId)));
return_ACPI_STATUS (AE_NOT_EXIST);
}
/*
* We must exit the interpreter because the region setup will
* potentially execute control methods (for example, the _REG method
* for this region)
*/
AcpiExExitInterpreter ();
Status = RegionSetup (RegionObj, ACPI_REGION_ACTIVATE,
HandlerDesc->AddressSpace.Context, &RegionContext);
/* Re-enter the interpreter */
AcpiExEnterInterpreter ();
/* Check for failure of the Region Setup */
if (ACPI_FAILURE (Status))
{
ACPI_EXCEPTION ((AE_INFO, Status,
"During region initialization: [%s]",
AcpiUtGetRegionName (RegionObj->Region.SpaceId)));
return_ACPI_STATUS (Status);
}
/* Region initialization may have been completed by RegionSetup */
if (!(RegionObj->Region.Flags & AOPOBJ_SETUP_COMPLETE))
{
RegionObj->Region.Flags |= AOPOBJ_SETUP_COMPLETE;
if (RegionObj2->Extra.RegionContext)
{
/* The handler for this region was already installed */
ACPI_FREE (RegionContext);
}
else
{
/*
* Save the returned context for use in all accesses to
* this particular region
*/
RegionObj2->Extra.RegionContext = RegionContext;
}
}
}
/* We have everything we need, we can invoke the address space handler */
Handler = HandlerDesc->AddressSpace.Handler;
ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION,
"Handler %p (@%p) Address %8.8X%8.8X [%s]\n",
&RegionObj->Region.Handler->AddressSpace, Handler,
ACPI_FORMAT_NATIVE_UINT (RegionObj->Region.Address + RegionOffset),
AcpiUtGetRegionName (RegionObj->Region.SpaceId)));
if (!(HandlerDesc->AddressSpace.HandlerFlags &
ACPI_ADDR_HANDLER_DEFAULT_INSTALLED))
{
/*
* For handlers other than the default (supplied) handlers, we must
* exit the interpreter because the handler *might* block -- we don't
* know what it will do, so we can't hold the lock on the intepreter.
*/
AcpiExExitInterpreter();
}
/* Call the handler */
Status = Handler (Function,
(RegionObj->Region.Address + RegionOffset), BitWidth, Value,
HandlerDesc->AddressSpace.Context, RegionObj2->Extra.RegionContext);
if (ACPI_FAILURE (Status))
{
ACPI_EXCEPTION ((AE_INFO, Status, "Returned by Handler for [%s]",
AcpiUtGetRegionName (RegionObj->Region.SpaceId)));
}
if (!(HandlerDesc->AddressSpace.HandlerFlags &
ACPI_ADDR_HANDLER_DEFAULT_INSTALLED))
{
/*
* We just returned from a non-default handler, we must re-enter the
* interpreter
*/
AcpiExEnterInterpreter ();
}
return_ACPI_STATUS (Status);
}
/*******************************************************************************
*
* FUNCTION: AcpiEvDetachRegion
*
* PARAMETERS: RegionObj - Region Object
* AcpiNsIsLocked - Namespace Region Already Locked?
*
* RETURN: None
*
* DESCRIPTION: Break the association between the handler and the region
* this is a two way association.
*
******************************************************************************/
void
AcpiEvDetachRegion(
ACPI_OPERAND_OBJECT *RegionObj,
BOOLEAN AcpiNsIsLocked)
{
ACPI_OPERAND_OBJECT *HandlerObj;
ACPI_OPERAND_OBJECT *ObjDesc;
ACPI_OPERAND_OBJECT **LastObjPtr;
ACPI_ADR_SPACE_SETUP RegionSetup;
void **RegionContext;
ACPI_OPERAND_OBJECT *RegionObj2;
ACPI_STATUS Status;
ACPI_FUNCTION_TRACE (EvDetachRegion);
RegionObj2 = AcpiNsGetSecondaryObject (RegionObj);
if (!RegionObj2)
{
return_VOID;
}
RegionContext = &RegionObj2->Extra.RegionContext;
/* Get the address handler from the region object */
HandlerObj = RegionObj->Region.Handler;
if (!HandlerObj)
{
/* This region has no handler, all done */
return_VOID;
}
/* Find this region in the handler's list */
ObjDesc = HandlerObj->AddressSpace.RegionList;
LastObjPtr = &HandlerObj->AddressSpace.RegionList;
while (ObjDesc)
{
/* Is this the correct Region? */
if (ObjDesc == RegionObj)
{
ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION,
"Removing Region %p from address handler %p\n",
RegionObj, HandlerObj));
/* This is it, remove it from the handler's list */
*LastObjPtr = ObjDesc->Region.Next;
ObjDesc->Region.Next = NULL; /* Must clear field */
if (AcpiNsIsLocked)
{
Status = AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE);
if (ACPI_FAILURE (Status))
{
return_VOID;
}
}
/* Now stop region accesses by executing the _REG method */
Status = AcpiEvExecuteRegMethod (RegionObj, 0);
if (ACPI_FAILURE (Status))
{
ACPI_EXCEPTION ((AE_INFO, Status, "from region _REG, [%s]",
AcpiUtGetRegionName (RegionObj->Region.SpaceId)));
}
if (AcpiNsIsLocked)
{
Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE);
if (ACPI_FAILURE (Status))
{
return_VOID;
}
}
/*
* If the region has been activated, call the setup handler with
* the deactivate notification
*/
if (RegionObj->Region.Flags & AOPOBJ_SETUP_COMPLETE)
{
RegionSetup = HandlerObj->AddressSpace.Setup;
Status = RegionSetup (RegionObj, ACPI_REGION_DEACTIVATE,
HandlerObj->AddressSpace.Context, RegionContext);
/* Init routine may fail, Just ignore errors */
if (ACPI_FAILURE (Status))
{
ACPI_EXCEPTION ((AE_INFO, Status,
"from region handler - deactivate, [%s]",
AcpiUtGetRegionName (RegionObj->Region.SpaceId)));
}
RegionObj->Region.Flags &= ~(AOPOBJ_SETUP_COMPLETE);
}
/*
* Remove handler reference in the region
*
* NOTE: this doesn't mean that the region goes away, the region
* is just inaccessible as indicated to the _REG method
*
* If the region is on the handler's list, this must be the
* region's handler
*/
RegionObj->Region.Handler = NULL;
AcpiUtRemoveReference (HandlerObj);
return_VOID;
}
/* Walk the linked list of handlers */
LastObjPtr = &ObjDesc->Region.Next;
ObjDesc = ObjDesc->Region.Next;
}
/* If we get here, the region was not in the handler's region list */
ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION,
"Cannot remove region %p from address handler %p\n",
RegionObj, HandlerObj));
return_VOID;
}
/*******************************************************************************
*
* FUNCTION: AcpiEvAttachRegion
*
* PARAMETERS: HandlerObj - Handler Object
* RegionObj - Region Object
* AcpiNsIsLocked - Namespace Region Already Locked?
*
* RETURN: None
*
* DESCRIPTION: Create the association between the handler and the region
* this is a two way association.
*
******************************************************************************/
ACPI_STATUS
AcpiEvAttachRegion (
ACPI_OPERAND_OBJECT *HandlerObj,
ACPI_OPERAND_OBJECT *RegionObj,
BOOLEAN AcpiNsIsLocked)
{
ACPI_FUNCTION_TRACE (EvAttachRegion);
ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION,
"Adding Region [%4.4s] %p to address handler %p [%s]\n",
AcpiUtGetNodeName (RegionObj->Region.Node),
RegionObj, HandlerObj,
AcpiUtGetRegionName (RegionObj->Region.SpaceId)));
/* Link this region to the front of the handler's list */
RegionObj->Region.Next = HandlerObj->AddressSpace.RegionList;
HandlerObj->AddressSpace.RegionList = RegionObj;
/* Install the region's handler */
if (RegionObj->Region.Handler)
{
return_ACPI_STATUS (AE_ALREADY_EXISTS);
}
RegionObj->Region.Handler = HandlerObj;
AcpiUtAddReference (HandlerObj);
return_ACPI_STATUS (AE_OK);
}
/*******************************************************************************
*
* FUNCTION: AcpiEvInstallHandler
*
* PARAMETERS: WalkNamespace callback
*
* DESCRIPTION: This routine installs an address handler into objects that are
* of type Region or Device.
*
* If the Object is a Device, and the device has a handler of
* the same type then the search is terminated in that branch.
*
* This is because the existing handler is closer in proximity
* to any more regions than the one we are trying to install.
*
******************************************************************************/
static ACPI_STATUS
AcpiEvInstallHandler (
ACPI_HANDLE ObjHandle,
UINT32 Level,
void *Context,
void **ReturnValue)
{
ACPI_OPERAND_OBJECT *HandlerObj;
ACPI_OPERAND_OBJECT *NextHandlerObj;
ACPI_OPERAND_OBJECT *ObjDesc;
ACPI_NAMESPACE_NODE *Node;
ACPI_STATUS Status;
ACPI_FUNCTION_NAME (EvInstallHandler);
HandlerObj = (ACPI_OPERAND_OBJECT *) Context;
/* Parameter validation */
if (!HandlerObj)
{
return (AE_OK);
}
/* Convert and validate the device handle */
Node = AcpiNsValidateHandle (ObjHandle);
if (!Node)
{
return (AE_BAD_PARAMETER);
}
/*
* We only care about regions and objects that are allowed to have
* address space handlers
*/
if ((Node->Type != ACPI_TYPE_DEVICE) &&
(Node->Type != ACPI_TYPE_REGION) &&
(Node != AcpiGbl_RootNode))
{
return (AE_OK);
}
/* Check for an existing internal object */
ObjDesc = AcpiNsGetAttachedObject (Node);
if (!ObjDesc)
{
/* No object, just exit */
return (AE_OK);
}
/* Devices are handled different than regions */
if (ObjDesc->Common.Type == ACPI_TYPE_DEVICE)
{
/* Check if this Device already has a handler for this address space */
NextHandlerObj = ObjDesc->Device.Handler;
while (NextHandlerObj)
{
/* Found a handler, is it for the same address space? */
if (NextHandlerObj->AddressSpace.SpaceId ==
HandlerObj->AddressSpace.SpaceId)
{
ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION,
"Found handler for region [%s] in device %p(%p) "
"handler %p\n",
AcpiUtGetRegionName (HandlerObj->AddressSpace.SpaceId),
ObjDesc, NextHandlerObj, HandlerObj));
/*
* Since the object we found it on was a device, then it
* means that someone has already installed a handler for
* the branch of the namespace from this device on. Just
* bail out telling the walk routine to not traverse this
* branch. This preserves the scoping rule for handlers.
*/
return (AE_CTRL_DEPTH);
}
/* Walk the linked list of handlers attached to this device */
NextHandlerObj = NextHandlerObj->AddressSpace.Next;
}
/*
* As long as the device didn't have a handler for this space we
* don't care about it. We just ignore it and proceed.
*/
return (AE_OK);
}
/* Object is a Region */
if (ObjDesc->Region.SpaceId != HandlerObj->AddressSpace.SpaceId)
{
/* This region is for a different address space, just ignore it */
return (AE_OK);
}
/*
* Now we have a region and it is for the handler's address space type.
*
* First disconnect region for any previous handler (if any)
*/
AcpiEvDetachRegion (ObjDesc, FALSE);
/* Connect the region to the new handler */
Status = AcpiEvAttachRegion (HandlerObj, ObjDesc, FALSE);
return (Status);
}
/*******************************************************************************
*
* FUNCTION: AcpiEvInstallSpaceHandler
*
* PARAMETERS: Node - Namespace node for the device
* SpaceId - The address space ID
* Handler - Address of the handler
* Setup - Address of the setup function
* Context - Value passed to the handler on each access
*
* RETURN: Status
*
* DESCRIPTION: Install a handler for all OpRegions of a given SpaceId.
* Assumes namespace is locked
*
******************************************************************************/
ACPI_STATUS
AcpiEvInstallSpaceHandler (
ACPI_NAMESPACE_NODE *Node,
ACPI_ADR_SPACE_TYPE SpaceId,
ACPI_ADR_SPACE_HANDLER Handler,
ACPI_ADR_SPACE_SETUP Setup,
void *Context)
{
ACPI_OPERAND_OBJECT *ObjDesc;
ACPI_OPERAND_OBJECT *HandlerObj;
ACPI_STATUS Status;
ACPI_OBJECT_TYPE Type;
UINT8 Flags = 0;
ACPI_FUNCTION_TRACE (EvInstallSpaceHandler);
/*
* This registration is valid for only the types below and the root. This
* is where the default handlers get placed.
*/
if ((Node->Type != ACPI_TYPE_DEVICE) &&
(Node->Type != ACPI_TYPE_PROCESSOR) &&
(Node->Type != ACPI_TYPE_THERMAL) &&
(Node != AcpiGbl_RootNode))
{
Status = AE_BAD_PARAMETER;
goto UnlockAndExit;
}
if (Handler == ACPI_DEFAULT_HANDLER)
{
Flags = ACPI_ADDR_HANDLER_DEFAULT_INSTALLED;
switch (SpaceId)
{
case ACPI_ADR_SPACE_SYSTEM_MEMORY:
Handler = AcpiExSystemMemorySpaceHandler;
Setup = AcpiEvSystemMemoryRegionSetup;
break;
case ACPI_ADR_SPACE_SYSTEM_IO:
Handler = AcpiExSystemIoSpaceHandler;
Setup = AcpiEvIoSpaceRegionSetup;
break;
case ACPI_ADR_SPACE_PCI_CONFIG:
Handler = AcpiExPciConfigSpaceHandler;
Setup = AcpiEvPciConfigRegionSetup;
break;
case ACPI_ADR_SPACE_CMOS:
Handler = AcpiExCmosSpaceHandler;
Setup = AcpiEvCmosRegionSetup;
break;
case ACPI_ADR_SPACE_PCI_BAR_TARGET:
Handler = AcpiExPciBarSpaceHandler;
Setup = AcpiEvPciBarRegionSetup;
break;
case ACPI_ADR_SPACE_DATA_TABLE:
Handler = AcpiExDataTableSpaceHandler;
Setup = NULL;
break;
default:
Status = AE_BAD_PARAMETER;
goto UnlockAndExit;
}
}
/* If the caller hasn't specified a setup routine, use the default */
if (!Setup)
{
Setup = AcpiEvDefaultRegionSetup;
}
/* Check for an existing internal object */
ObjDesc = AcpiNsGetAttachedObject (Node);
if (ObjDesc)
{
/*
* The attached device object already exists. Make sure the handler
* is not already installed.
*/
HandlerObj = ObjDesc->Device.Handler;
/* Walk the handler list for this device */
while (HandlerObj)
{
/* Same SpaceId indicates a handler already installed */
if (HandlerObj->AddressSpace.SpaceId == SpaceId)
{
if (HandlerObj->AddressSpace.Handler == Handler)
{
/*
* It is (relatively) OK to attempt to install the SAME
* handler twice. This can easily happen with the
* PCI_Config space.
*/
Status = AE_SAME_HANDLER;
goto UnlockAndExit;
}
else
{
/* A handler is already installed */
Status = AE_ALREADY_EXISTS;
}
goto UnlockAndExit;
}
/* Walk the linked list of handlers */
HandlerObj = HandlerObj->AddressSpace.Next;
}
}
else
{
ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION,
"Creating object on Device %p while installing handler\n", Node));
/* ObjDesc does not exist, create one */
if (Node->Type == ACPI_TYPE_ANY)
{
Type = ACPI_TYPE_DEVICE;
}
else
{
Type = Node->Type;
}
ObjDesc = AcpiUtCreateInternalObject (Type);
if (!ObjDesc)
{
Status = AE_NO_MEMORY;
goto UnlockAndExit;
}
/* Init new descriptor */
ObjDesc->Common.Type = (UINT8) Type;
/* Attach the new object to the Node */
Status = AcpiNsAttachObject (Node, ObjDesc, Type);
/* Remove local reference to the object */
AcpiUtRemoveReference (ObjDesc);
if (ACPI_FAILURE (Status))
{
goto UnlockAndExit;
}
}
ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION,
"Installing address handler for region %s(%X) on Device %4.4s %p(%p)\n",
AcpiUtGetRegionName (SpaceId), SpaceId,
AcpiUtGetNodeName (Node), Node, ObjDesc));
/*
* Install the handler
*
* At this point there is no existing handler. Just allocate the object
* for the handler and link it into the list.
*/
HandlerObj = AcpiUtCreateInternalObject (ACPI_TYPE_LOCAL_ADDRESS_HANDLER);
if (!HandlerObj)
{
Status = AE_NO_MEMORY;
goto UnlockAndExit;
}
/* Init handler obj */
HandlerObj->AddressSpace.SpaceId = (UINT8) SpaceId;
HandlerObj->AddressSpace.HandlerFlags = Flags;
HandlerObj->AddressSpace.RegionList = NULL;
HandlerObj->AddressSpace.Node = Node;
HandlerObj->AddressSpace.Handler = Handler;
HandlerObj->AddressSpace.Context = Context;
HandlerObj->AddressSpace.Setup = Setup;
/* Install at head of Device.AddressSpace list */
HandlerObj->AddressSpace.Next = ObjDesc->Device.Handler;
/*
* The Device object is the first reference on the HandlerObj.
* Each region that uses the handler adds a reference.
*/
ObjDesc->Device.Handler = HandlerObj;
/*
* Walk the namespace finding all of the regions this
* handler will manage.
*
* Start at the device and search the branch toward
* the leaf nodes until either the leaf is encountered or
* a device is detected that has an address handler of the
* same type.
*
* In either case, back up and search down the remainder
* of the branch
*/
Status = AcpiNsWalkNamespace (ACPI_TYPE_ANY, Node, ACPI_UINT32_MAX,
ACPI_NS_WALK_UNLOCK, AcpiEvInstallHandler, NULL,
HandlerObj, NULL);
UnlockAndExit:
return_ACPI_STATUS (Status);
}
/*******************************************************************************
*
* FUNCTION: AcpiEvExecuteRegMethods
*
* PARAMETERS: Node - Namespace node for the device
* SpaceId - The address space ID
*
* RETURN: Status
*
* DESCRIPTION: Run all _REG methods for the input Space ID;
* Note: assumes namespace is locked, or system init time.
*
******************************************************************************/
ACPI_STATUS
AcpiEvExecuteRegMethods (
ACPI_NAMESPACE_NODE *Node,
ACPI_ADR_SPACE_TYPE SpaceId)
{
ACPI_STATUS Status;
ACPI_FUNCTION_TRACE (EvExecuteRegMethods);
/*
* Run all _REG methods for all Operation Regions for this space ID. This
* is a separate walk in order to handle any interdependencies between
* regions and _REG methods. (i.e. handlers must be installed for all
* regions of this Space ID before we can run any _REG methods)
*/
Status = AcpiNsWalkNamespace (ACPI_TYPE_ANY, Node, ACPI_UINT32_MAX,
ACPI_NS_WALK_UNLOCK, AcpiEvRegRun, NULL,
&SpaceId, NULL);
return_ACPI_STATUS (Status);
}
/*******************************************************************************
*
* FUNCTION: AcpiEvRegRun
*
* PARAMETERS: WalkNamespace callback
*
* DESCRIPTION: Run _REG method for region objects of the requested spaceID
*
******************************************************************************/
static ACPI_STATUS
AcpiEvRegRun (
ACPI_HANDLE ObjHandle,
UINT32 Level,
void *Context,
void **ReturnValue)
{
ACPI_OPERAND_OBJECT *ObjDesc;
ACPI_NAMESPACE_NODE *Node;
ACPI_ADR_SPACE_TYPE SpaceId;
ACPI_STATUS Status;
SpaceId = *ACPI_CAST_PTR (ACPI_ADR_SPACE_TYPE, Context);
/* Convert and validate the device handle */
Node = AcpiNsValidateHandle (ObjHandle);
if (!Node)
{
return (AE_BAD_PARAMETER);
}
/*
* We only care about regions.and objects that are allowed to have address
* space handlers
*/
if ((Node->Type != ACPI_TYPE_REGION) &&
(Node != AcpiGbl_RootNode))
{
return (AE_OK);
}
/* Check for an existing internal object */
ObjDesc = AcpiNsGetAttachedObject (Node);
if (!ObjDesc)
{
/* No object, just exit */
return (AE_OK);
}
/* Object is a Region */
if (ObjDesc->Region.SpaceId != SpaceId)
{
/* This region is for a different address space, just ignore it */
return (AE_OK);
}
Status = AcpiEvExecuteRegMethod (ObjDesc, 1);
return (Status);
}