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minix/drivers/acpi/events/evregion.c
Tomas Hruby 9560b6dea8 ACPI driver 
- 99% of the code is Intel's ACPICA. The license is compliant with BSD
  and GNU and virtually all systems that use ACPI use this code, For
  instance it is part of the Linux kernel.

- The only minix specific files are

  acpi.c
  osminixxf.c
  platform/acminix.h

  and

  include/minix/acpi.h

- At the moment the driver does not register interrupt hooks which I
  believe is mainly for handling PnP, events like "battery level is
  low" and power management. Should not be difficult to add it if need
  be.

- The interface to the outside world is virtually non-existent except
  a trivial message based service for PCI driver to query which device
  is connected to what IRQ line. This will evolve as more components
  start using this driver. VM, Scheduler and IOMMU are the possible
  users right now.

- because of dependency on a native 64bit (long long, part of c99) it
  is compiled only with a gnu-like compilers which in case of Minix
  includes gcc llvm-gcc and clang
2010-09-02 15:44:04 +00:00

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/******************************************************************************
*
* 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);
}
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