/****************************************************************************** * * Module Name: evrgnini- ACPI AddressSpace (OpRegion) init * $Revision: 1.89 $ * *****************************************************************************/ /****************************************************************************** * * 1. Copyright Notice * * Some or all of this work - Copyright (c) 1999 - 2008, 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 __EVRGNINI_C__ #include "acpi.h" #include "acevents.h" #include "acnamesp.h" #define _COMPONENT ACPI_EVENTS ACPI_MODULE_NAME ("evrgnini") /* Local prototypes */ static BOOLEAN AcpiEvMatchPciRootBridge ( char *Id); static BOOLEAN AcpiEvIsPciRootBridge ( ACPI_NAMESPACE_NODE *Node); /******************************************************************************* * * FUNCTION: AcpiEvSystemMemoryRegionSetup * * PARAMETERS: Handle - Region we are interested in * Function - Start or stop * HandlerContext - Address space handler context * RegionContext - Region specific context * * RETURN: Status * * DESCRIPTION: Setup a SystemMemory operation region * ******************************************************************************/ ACPI_STATUS AcpiEvSystemMemoryRegionSetup ( ACPI_HANDLE Handle, UINT32 Function, void *HandlerContext, void **RegionContext) { ACPI_OPERAND_OBJECT *RegionDesc = (ACPI_OPERAND_OBJECT *) Handle; ACPI_MEM_SPACE_CONTEXT *LocalRegionContext; ACPI_FUNCTION_TRACE (EvSystemMemoryRegionSetup); if (Function == ACPI_REGION_DEACTIVATE) { if (*RegionContext) { LocalRegionContext = (ACPI_MEM_SPACE_CONTEXT *) *RegionContext; /* Delete a cached mapping if present */ if (LocalRegionContext->MappedLength) { AcpiOsUnmapMemory (LocalRegionContext->MappedLogicalAddress, LocalRegionContext->MappedLength); } ACPI_FREE (LocalRegionContext); *RegionContext = NULL; } return_ACPI_STATUS (AE_OK); } /* Create a new context */ LocalRegionContext = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_MEM_SPACE_CONTEXT)); if (!(LocalRegionContext)) { return_ACPI_STATUS (AE_NO_MEMORY); } /* Save the region length and address for use in the handler */ LocalRegionContext->Length = RegionDesc->Region.Length; LocalRegionContext->Address = RegionDesc->Region.Address; *RegionContext = LocalRegionContext; return_ACPI_STATUS (AE_OK); } /******************************************************************************* * * FUNCTION: AcpiEvIoSpaceRegionSetup * * PARAMETERS: Handle - Region we are interested in * Function - Start or stop * HandlerContext - Address space handler context * RegionContext - Region specific context * * RETURN: Status * * DESCRIPTION: Setup a IO operation region * ******************************************************************************/ ACPI_STATUS AcpiEvIoSpaceRegionSetup ( ACPI_HANDLE Handle, UINT32 Function, void *HandlerContext, void **RegionContext) { ACPI_FUNCTION_TRACE (EvIoSpaceRegionSetup); if (Function == ACPI_REGION_DEACTIVATE) { *RegionContext = NULL; } else { *RegionContext = HandlerContext; } return_ACPI_STATUS (AE_OK); } /******************************************************************************* * * FUNCTION: AcpiEvPciConfigRegionSetup * * PARAMETERS: Handle - Region we are interested in * Function - Start or stop * HandlerContext - Address space handler context * RegionContext - Region specific context * * RETURN: Status * * DESCRIPTION: Setup a PCI_Config operation region * * MUTEX: Assumes namespace is not locked * ******************************************************************************/ ACPI_STATUS AcpiEvPciConfigRegionSetup ( ACPI_HANDLE Handle, UINT32 Function, void *HandlerContext, void **RegionContext) { ACPI_STATUS Status = AE_OK; ACPI_INTEGER PciValue; ACPI_PCI_ID *PciId = *RegionContext; ACPI_OPERAND_OBJECT *HandlerObj; ACPI_NAMESPACE_NODE *ParentNode; ACPI_NAMESPACE_NODE *PciRootNode; ACPI_NAMESPACE_NODE *PciDeviceNode; ACPI_OPERAND_OBJECT *RegionObj = (ACPI_OPERAND_OBJECT *) Handle; ACPI_FUNCTION_TRACE (EvPciConfigRegionSetup); HandlerObj = RegionObj->Region.Handler; if (!HandlerObj) { /* * No installed handler. This shouldn't happen because the dispatch * routine checks before we get here, but we check again just in case. */ ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION, "Attempting to init a region %p, with no handler\n", RegionObj)); return_ACPI_STATUS (AE_NOT_EXIST); } *RegionContext = NULL; if (Function == ACPI_REGION_DEACTIVATE) { if (PciId) { ACPI_FREE (PciId); } return_ACPI_STATUS (Status); } ParentNode = AcpiNsGetParentNode (RegionObj->Region.Node); /* * Get the _SEG and _BBN values from the device upon which the handler * is installed. * * We need to get the _SEG and _BBN objects relative to the PCI BUS device. * This is the device the handler has been registered to handle. */ /* * If the AddressSpace.Node is still pointing to the root, we need * to scan upward for a PCI Root bridge and re-associate the OpRegion * handlers with that device. */ if (HandlerObj->AddressSpace.Node == AcpiGbl_RootNode) { /* Start search from the parent object */ PciRootNode = ParentNode; while (PciRootNode != AcpiGbl_RootNode) { /* Get the _HID/_CID in order to detect a RootBridge */ if (AcpiEvIsPciRootBridge (PciRootNode)) { /* Install a handler for this PCI root bridge */ Status = AcpiInstallAddressSpaceHandler ( (ACPI_HANDLE) PciRootNode, ACPI_ADR_SPACE_PCI_CONFIG, ACPI_DEFAULT_HANDLER, NULL, NULL); if (ACPI_FAILURE (Status)) { if (Status == AE_SAME_HANDLER) { /* * It is OK if the handler is already installed on the root * bridge. Still need to return a context object for the * new PCI_Config operation region, however. */ Status = AE_OK; } else { ACPI_EXCEPTION ((AE_INFO, Status, "Could not install PciConfig handler for Root Bridge %4.4s", AcpiUtGetNodeName (PciRootNode))); } } break; } PciRootNode = AcpiNsGetParentNode (PciRootNode); } /* PCI root bridge not found, use namespace root node */ } else { PciRootNode = HandlerObj->AddressSpace.Node; } /* * If this region is now initialized, we are done. * (InstallAddressSpaceHandler could have initialized it) */ if (RegionObj->Region.Flags & AOPOBJ_SETUP_COMPLETE) { return_ACPI_STATUS (AE_OK); } /* Region is still not initialized. Create a new context */ PciId = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_PCI_ID)); if (!PciId) { return_ACPI_STATUS (AE_NO_MEMORY); } /* * For PCI_Config space access, we need the segment, bus, * device and function numbers. Acquire them here. * * Find the parent device object. (This allows the operation region to be * within a subscope under the device, such as a control method.) */ PciDeviceNode = RegionObj->Region.Node; while (PciDeviceNode && (PciDeviceNode->Type != ACPI_TYPE_DEVICE)) { PciDeviceNode = AcpiNsGetParentNode (PciDeviceNode); } if (!PciDeviceNode) { ACPI_FREE (PciId); return_ACPI_STATUS (AE_AML_OPERAND_TYPE); } /* * Get the PCI device and function numbers from the _ADR object * contained in the parent's scope. */ Status = AcpiUtEvaluateNumericObject (METHOD_NAME__ADR, PciDeviceNode, &PciValue); /* * The default is zero, and since the allocation above zeroed * the data, just do nothing on failure. */ if (ACPI_SUCCESS (Status)) { PciId->Device = ACPI_HIWORD (ACPI_LODWORD (PciValue)); PciId->Function = ACPI_LOWORD (ACPI_LODWORD (PciValue)); } /* The PCI segment number comes from the _SEG method */ Status = AcpiUtEvaluateNumericObject (METHOD_NAME__SEG, PciRootNode, &PciValue); if (ACPI_SUCCESS (Status)) { PciId->Segment = ACPI_LOWORD (PciValue); } /* The PCI bus number comes from the _BBN method */ Status = AcpiUtEvaluateNumericObject (METHOD_NAME__BBN, PciRootNode, &PciValue); if (ACPI_SUCCESS (Status)) { PciId->Bus = ACPI_LOWORD (PciValue); } /* Complete this device's PciId */ AcpiOsDerivePciId (PciRootNode, RegionObj->Region.Node, &PciId); *RegionContext = PciId; return_ACPI_STATUS (AE_OK); } /******************************************************************************* * * FUNCTION: AcpiEvMatchPciRootBridge * * PARAMETERS: Id - The HID/CID in string format * * RETURN: TRUE if the Id is a match for a PCI/PCI-Express Root Bridge * * DESCRIPTION: Determine if the input ID is a PCI Root Bridge ID. * ******************************************************************************/ static BOOLEAN AcpiEvMatchPciRootBridge ( char *Id) { /* * Check if this is a PCI root. * ACPI 3.0+: check for a PCI Express root also. */ if (!(ACPI_STRNCMP (Id, PCI_ROOT_HID_STRING, sizeof (PCI_ROOT_HID_STRING))) || !(ACPI_STRNCMP (Id, PCI_EXPRESS_ROOT_HID_STRING, sizeof (PCI_EXPRESS_ROOT_HID_STRING)))) { return (TRUE); } return (FALSE); } /******************************************************************************* * * FUNCTION: AcpiEvIsPciRootBridge * * PARAMETERS: Node - Device node being examined * * RETURN: TRUE if device is a PCI/PCI-Express Root Bridge * * DESCRIPTION: Determine if the input device represents a PCI Root Bridge by * examining the _HID and _CID for the device. * ******************************************************************************/ static BOOLEAN AcpiEvIsPciRootBridge ( ACPI_NAMESPACE_NODE *Node) { ACPI_STATUS Status; ACPI_DEVICE_ID Hid; ACPI_COMPATIBLE_ID_LIST *Cid; UINT32 i; /* * Get the _HID and check for a PCI Root Bridge */ Status = AcpiUtExecute_HID (Node, &Hid); if (ACPI_FAILURE (Status)) { return (FALSE); } if (AcpiEvMatchPciRootBridge (Hid.Value)) { return (TRUE); } /* * The _HID did not match. * Get the _CID and check for a PCI Root Bridge */ Status = AcpiUtExecute_CID (Node, &Cid); if (ACPI_FAILURE (Status)) { return (FALSE); } /* Check all _CIDs in the returned list */ for (i = 0; i < Cid->Count; i++) { if (AcpiEvMatchPciRootBridge (Cid->Id[i].Value)) { ACPI_FREE (Cid); return (TRUE); } } ACPI_FREE (Cid); return (FALSE); } /******************************************************************************* * * FUNCTION: AcpiEvPciBarRegionSetup * * PARAMETERS: Handle - Region we are interested in * Function - Start or stop * HandlerContext - Address space handler context * RegionContext - Region specific context * * RETURN: Status * * DESCRIPTION: Setup a PciBAR operation region * * MUTEX: Assumes namespace is not locked * ******************************************************************************/ ACPI_STATUS AcpiEvPciBarRegionSetup ( ACPI_HANDLE Handle, UINT32 Function, void *HandlerContext, void **RegionContext) { ACPI_FUNCTION_TRACE (EvPciBarRegionSetup); return_ACPI_STATUS (AE_OK); } /******************************************************************************* * * FUNCTION: AcpiEvCmosRegionSetup * * PARAMETERS: Handle - Region we are interested in * Function - Start or stop * HandlerContext - Address space handler context * RegionContext - Region specific context * * RETURN: Status * * DESCRIPTION: Setup a CMOS operation region * * MUTEX: Assumes namespace is not locked * ******************************************************************************/ ACPI_STATUS AcpiEvCmosRegionSetup ( ACPI_HANDLE Handle, UINT32 Function, void *HandlerContext, void **RegionContext) { ACPI_FUNCTION_TRACE (EvCmosRegionSetup); return_ACPI_STATUS (AE_OK); } /******************************************************************************* * * FUNCTION: AcpiEvDefaultRegionSetup * * PARAMETERS: Handle - Region we are interested in * Function - Start or stop * HandlerContext - Address space handler context * RegionContext - Region specific context * * RETURN: Status * * DESCRIPTION: Default region initialization * ******************************************************************************/ ACPI_STATUS AcpiEvDefaultRegionSetup ( ACPI_HANDLE Handle, UINT32 Function, void *HandlerContext, void **RegionContext) { ACPI_FUNCTION_TRACE (EvDefaultRegionSetup); if (Function == ACPI_REGION_DEACTIVATE) { *RegionContext = NULL; } else { *RegionContext = HandlerContext; } return_ACPI_STATUS (AE_OK); } /******************************************************************************* * * FUNCTION: AcpiEvInitializeRegion * * PARAMETERS: RegionObj - Region we are initializing * AcpiNsLocked - Is namespace locked? * * RETURN: Status * * DESCRIPTION: Initializes the region, finds any _REG methods and saves them * for execution at a later time * * Get the appropriate address space handler for a newly * created region. * * This also performs address space specific initialization. For * example, PCI regions must have an _ADR object that contains * a PCI address in the scope of the definition. This address is * required to perform an access to PCI config space. * * MUTEX: Interpreter should be unlocked, because we may run the _REG * method for this region. * ******************************************************************************/ ACPI_STATUS AcpiEvInitializeRegion ( ACPI_OPERAND_OBJECT *RegionObj, BOOLEAN AcpiNsLocked) { ACPI_OPERAND_OBJECT *HandlerObj; ACPI_OPERAND_OBJECT *ObjDesc; ACPI_ADR_SPACE_TYPE SpaceId; ACPI_NAMESPACE_NODE *Node; ACPI_STATUS Status; ACPI_NAMESPACE_NODE *MethodNode; ACPI_NAME *RegNamePtr = (ACPI_NAME *) METHOD_NAME__REG; ACPI_OPERAND_OBJECT *RegionObj2; ACPI_FUNCTION_TRACE_U32 (EvInitializeRegion, AcpiNsLocked); if (!RegionObj) { return_ACPI_STATUS (AE_BAD_PARAMETER); } if (RegionObj->Common.Flags & AOPOBJ_OBJECT_INITIALIZED) { return_ACPI_STATUS (AE_OK); } RegionObj2 = AcpiNsGetSecondaryObject (RegionObj); if (!RegionObj2) { return_ACPI_STATUS (AE_NOT_EXIST); } Node = AcpiNsGetParentNode (RegionObj->Region.Node); SpaceId = RegionObj->Region.SpaceId; /* Setup defaults */ RegionObj->Region.Handler = NULL; RegionObj2->Extra.Method_REG = NULL; RegionObj->Common.Flags &= ~(AOPOBJ_SETUP_COMPLETE); RegionObj->Common.Flags |= AOPOBJ_OBJECT_INITIALIZED; /* Find any "_REG" method associated with this region definition */ Status = AcpiNsSearchOneScope ( *RegNamePtr, Node, ACPI_TYPE_METHOD, &MethodNode); if (ACPI_SUCCESS (Status)) { /* * The _REG method is optional and there can be only one per region * definition. This will be executed when the handler is attached * or removed */ RegionObj2->Extra.Method_REG = MethodNode; } /* * The following loop depends upon the root Node having no parent * ie: AcpiGbl_RootNode->ParentEntry being set to NULL */ while (Node) { /* Check to see if a handler exists */ HandlerObj = NULL; ObjDesc = AcpiNsGetAttachedObject (Node); if (ObjDesc) { /* Can only be a handler if the object exists */ switch (Node->Type) { case ACPI_TYPE_DEVICE: HandlerObj = ObjDesc->Device.Handler; break; case ACPI_TYPE_PROCESSOR: HandlerObj = ObjDesc->Processor.Handler; break; case ACPI_TYPE_THERMAL: HandlerObj = ObjDesc->ThermalZone.Handler; break; default: /* Ignore other objects */ break; } while (HandlerObj) { /* Is this handler of the correct type? */ if (HandlerObj->AddressSpace.SpaceId == SpaceId) { /* Found correct handler */ ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION, "Found handler %p for region %p in obj %p\n", HandlerObj, RegionObj, ObjDesc)); Status = AcpiEvAttachRegion (HandlerObj, RegionObj, AcpiNsLocked); /* * Tell all users that this region is usable by running the _REG * method */ if (AcpiNsLocked) { Status = AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE); if (ACPI_FAILURE (Status)) { return_ACPI_STATUS (Status); } } Status = AcpiEvExecuteRegMethod (RegionObj, 1); if (AcpiNsLocked) { Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE); if (ACPI_FAILURE (Status)) { return_ACPI_STATUS (Status); } } return_ACPI_STATUS (AE_OK); } /* Try next handler in the list */ HandlerObj = HandlerObj->AddressSpace.Next; } } /* * This node does not have the handler we need; * Pop up one level */ Node = AcpiNsGetParentNode (Node); } /* If we get here, there is no handler for this region */ ACPI_DEBUG_PRINT ((ACPI_DB_OPREGION, "No handler for RegionType %s(%X) (RegionObj %p)\n", AcpiUtGetRegionName (SpaceId), SpaceId, RegionObj)); return_ACPI_STATUS (AE_NOT_EXIST); }