/****************************************************************************** * * Module Name: evregion - ACPI AddressSpace (OpRegion) handler dispatch * *****************************************************************************/ /* * Copyright (C) 2000 - 2011, Intel Corp. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions, and the following disclaimer, * without modification. * 2. Redistributions in binary form must reproduce at minimum a disclaimer * substantially similar to the "NO WARRANTY" disclaimer below * ("Disclaimer") and any redistribution must be conditioned upon * including a substantially similar Disclaimer requirement for further * binary redistribution. * 3. Neither the names of the above-listed copyright holders nor the names * of any contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * Alternatively, this software may be distributed under the terms of the * GNU General Public License ("GPL") version 2 as published by the Free * Software Foundation. * * NO WARRANTY * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGES. */ #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 void AcpiEvOrphanEcRegMethod ( void); 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]); } } AcpiGbl_RegMethodsExecuted = TRUE; (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, ACPI_REG_DISCONNECT); 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); /* Special case for EC: handle "orphan" _REG methods with no region */ if (SpaceId == ACPI_ADR_SPACE_EC) { AcpiEvOrphanEcRegMethod (); } 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, ACPI_REG_CONNECT); return (Status); } /******************************************************************************* * * FUNCTION: AcpiEvOrphanEcRegMethod * * PARAMETERS: None * * RETURN: None * * DESCRIPTION: Execute an "orphan" _REG method that appears under the EC * device. This is a _REG method that has no corresponding region * within the EC device scope. The orphan _REG method appears to * have been enabled by the description of the ECDT in the ACPI * specification: "The availability of the region space can be * detected by providing a _REG method object underneath the * Embedded Controller device." * * To quickly access the EC device, we use the EC_ID that appears * within the ECDT. Otherwise, we would need to perform a time- * consuming namespace walk, executing _HID methods to find the * EC device. * ******************************************************************************/ static void AcpiEvOrphanEcRegMethod ( void) { ACPI_TABLE_ECDT *Table; ACPI_STATUS Status; ACPI_OBJECT_LIST Args; ACPI_OBJECT Objects[2]; ACPI_NAMESPACE_NODE *EcDeviceNode; ACPI_NAMESPACE_NODE *RegMethod; ACPI_NAMESPACE_NODE *NextNode; ACPI_FUNCTION_TRACE (EvOrphanEcRegMethod); /* Get the ECDT (if present in system) */ Status = AcpiGetTable (ACPI_SIG_ECDT, 0, ACPI_CAST_INDIRECT_PTR (ACPI_TABLE_HEADER, &Table)); if (ACPI_FAILURE (Status)) { return_VOID; } /* We need a valid EC_ID string */ if (!(*Table->Id)) { return_VOID; } /* Namespace is currently locked, must release */ (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE); /* Get a handle to the EC device referenced in the ECDT */ Status = AcpiGetHandle (NULL, ACPI_CAST_PTR (char, Table->Id), ACPI_CAST_PTR (ACPI_HANDLE, &EcDeviceNode)); if (ACPI_FAILURE (Status)) { goto Exit; } /* Get a handle to a _REG method immediately under the EC device */ Status = AcpiGetHandle (EcDeviceNode, METHOD_NAME__REG, ACPI_CAST_PTR (ACPI_HANDLE, &RegMethod)); if (ACPI_FAILURE (Status)) { goto Exit; } /* * Execute the _REG method only if there is no Operation Region in * this scope with the Embedded Controller space ID. Otherwise, it * will already have been executed. Note, this allows for Regions * with other space IDs to be present; but the code below will then * execute the _REG method with the EC space ID argument. */ NextNode = AcpiNsGetNextNode (EcDeviceNode, NULL); while (NextNode) { if ((NextNode->Type == ACPI_TYPE_REGION) && (NextNode->Object) && (NextNode->Object->Region.SpaceId == ACPI_ADR_SPACE_EC)) { goto Exit; /* Do not execute _REG */ } NextNode = AcpiNsGetNextNode (EcDeviceNode, NextNode); } /* Evaluate the _REG(EC,Connect) method */ Args.Count = 2; Args.Pointer = Objects; Objects[0].Type = ACPI_TYPE_INTEGER; Objects[0].Integer.Value = ACPI_ADR_SPACE_EC; Objects[1].Type = ACPI_TYPE_INTEGER; Objects[1].Integer.Value = ACPI_REG_CONNECT; Status = AcpiEvaluateObject (RegMethod, NULL, &Args, NULL); Exit: /* We ignore all errors from above, don't care */ Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE); return_VOID; }