/****************************************************************************** * * Module Name: nsxfname - Public interfaces to the ACPI subsystem * ACPI Namespace oriented interfaces * *****************************************************************************/ /****************************************************************************** * * 1. Copyright Notice * * Some or all of this work - Copyright (c) 1999 - 2021, 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. * ***************************************************************************** * * Alternatively, you may choose to be licensed under the terms of the * following license: * * 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. * * 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 MERCHANTABILITY AND FITNESS FOR * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * 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 DAMAGE. * * Alternatively, you may choose to be licensed under the terms of the * GNU General Public License ("GPL") version 2 as published by the Free * Software Foundation. * *****************************************************************************/ #define EXPORT_ACPI_INTERFACES #include "acpi.h" #include "accommon.h" #include "acnamesp.h" #include "acparser.h" #include "amlcode.h" #define _COMPONENT ACPI_NAMESPACE ACPI_MODULE_NAME ("nsxfname") /* Local prototypes */ static char * AcpiNsCopyDeviceId ( ACPI_PNP_DEVICE_ID *Dest, ACPI_PNP_DEVICE_ID *Source, char *StringArea); /****************************************************************************** * * FUNCTION: AcpiGetHandle * * PARAMETERS: Parent - Object to search under (search scope). * Pathname - Pointer to an asciiz string containing the * name * RetHandle - Where the return handle is returned * * RETURN: Status * * DESCRIPTION: This routine will search for a caller specified name in the * name space. The caller can restrict the search region by * specifying a non NULL parent. The parent value is itself a * namespace handle. * ******************************************************************************/ ACPI_STATUS AcpiGetHandle ( ACPI_HANDLE Parent, ACPI_STRING Pathname, ACPI_HANDLE *RetHandle) { ACPI_STATUS Status; ACPI_NAMESPACE_NODE *Node = NULL; ACPI_NAMESPACE_NODE *PrefixNode = NULL; ACPI_FUNCTION_ENTRY (); /* Parameter Validation */ if (!RetHandle || !Pathname) { return (AE_BAD_PARAMETER); } /* Convert a parent handle to a prefix node */ if (Parent) { PrefixNode = AcpiNsValidateHandle (Parent); if (!PrefixNode) { return (AE_BAD_PARAMETER); } } /* * Valid cases are: * 1) Fully qualified pathname * 2) Parent + Relative pathname * * Error for */ if (ACPI_IS_ROOT_PREFIX (Pathname[0])) { /* Pathname is fully qualified (starts with '\') */ /* Special case for root-only, since we can't search for it */ if (!strcmp (Pathname, ACPI_NS_ROOT_PATH)) { *RetHandle = ACPI_CAST_PTR (ACPI_HANDLE, AcpiGbl_RootNode); return (AE_OK); } } else if (!PrefixNode) { /* Relative path with null prefix is disallowed */ return (AE_BAD_PARAMETER); } /* Find the Node and convert to a handle */ Status = AcpiNsGetNode (PrefixNode, Pathname, ACPI_NS_NO_UPSEARCH, &Node); if (ACPI_SUCCESS (Status)) { *RetHandle = ACPI_CAST_PTR (ACPI_HANDLE, Node); } return (Status); } ACPI_EXPORT_SYMBOL (AcpiGetHandle) /****************************************************************************** * * FUNCTION: AcpiGetName * * PARAMETERS: Handle - Handle to be converted to a pathname * NameType - Full pathname or single segment * Buffer - Buffer for returned path * * RETURN: Pointer to a string containing the fully qualified Name. * * DESCRIPTION: This routine returns the fully qualified name associated with * the Handle parameter. This and the AcpiPathnameToHandle are * complementary functions. * ******************************************************************************/ ACPI_STATUS AcpiGetName ( ACPI_HANDLE Handle, UINT32 NameType, ACPI_BUFFER *Buffer) { ACPI_STATUS Status; /* Parameter validation */ if (NameType > ACPI_NAME_TYPE_MAX) { return (AE_BAD_PARAMETER); } Status = AcpiUtValidateBuffer (Buffer); if (ACPI_FAILURE (Status)) { return (Status); } /* * Wants the single segment ACPI name. * Validate handle and convert to a namespace Node */ Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE); if (ACPI_FAILURE (Status)) { return (Status); } if (NameType == ACPI_FULL_PATHNAME || NameType == ACPI_FULL_PATHNAME_NO_TRAILING) { /* Get the full pathname (From the namespace root) */ Status = AcpiNsHandleToPathname (Handle, Buffer, NameType == ACPI_FULL_PATHNAME ? FALSE : TRUE); } else { /* Get the single name */ Status = AcpiNsHandleToName (Handle, Buffer); } (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE); return (Status); } ACPI_EXPORT_SYMBOL (AcpiGetName) /****************************************************************************** * * FUNCTION: AcpiNsCopyDeviceId * * PARAMETERS: Dest - Pointer to the destination PNP_DEVICE_ID * Source - Pointer to the source PNP_DEVICE_ID * StringArea - Pointer to where to copy the dest string * * RETURN: Pointer to the next string area * * DESCRIPTION: Copy a single PNP_DEVICE_ID, including the string data. * ******************************************************************************/ static char * AcpiNsCopyDeviceId ( ACPI_PNP_DEVICE_ID *Dest, ACPI_PNP_DEVICE_ID *Source, char *StringArea) { /* Create the destination PNP_DEVICE_ID */ Dest->String = StringArea; Dest->Length = Source->Length; /* Copy actual string and return a pointer to the next string area */ memcpy (StringArea, Source->String, Source->Length); return (StringArea + Source->Length); } /****************************************************************************** * * FUNCTION: AcpiGetObjectInfo * * PARAMETERS: Handle - Object Handle * ReturnBuffer - Where the info is returned * * RETURN: Status * * DESCRIPTION: Returns information about an object as gleaned from the * namespace node and possibly by running several standard * control methods (Such as in the case of a device.) * * For Device and Processor objects, run the Device _HID, _UID, _CID, * _CLS, _ADR, _SxW, and _SxD methods. * * Note: Allocates the return buffer, must be freed by the caller. * * Note: This interface is intended to be used during the initial device * discovery namespace traversal. Therefore, no complex methods can be * executed, especially those that access operation regions. Therefore, do * not add any additional methods that could cause problems in this area. * Because of this reason support for the following methods has been removed: * 1) _SUB method was removed (11/2015) * 2) _STA method was removed (02/2018) * ******************************************************************************/ ACPI_STATUS AcpiGetObjectInfo ( ACPI_HANDLE Handle, ACPI_DEVICE_INFO **ReturnBuffer) { ACPI_NAMESPACE_NODE *Node; ACPI_DEVICE_INFO *Info; ACPI_PNP_DEVICE_ID_LIST *CidList = NULL; ACPI_PNP_DEVICE_ID *Hid = NULL; ACPI_PNP_DEVICE_ID *Uid = NULL; ACPI_PNP_DEVICE_ID *Cls = NULL; char *NextIdString; ACPI_OBJECT_TYPE Type; ACPI_NAME Name; UINT8 ParamCount= 0; UINT16 Valid = 0; UINT32 InfoSize; UINT32 i; ACPI_STATUS Status; /* Parameter validation */ if (!Handle || !ReturnBuffer) { return (AE_BAD_PARAMETER); } Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE); if (ACPI_FAILURE (Status)) { return (Status); } Node = AcpiNsValidateHandle (Handle); if (!Node) { (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE); return (AE_BAD_PARAMETER); } /* Get the namespace node data while the namespace is locked */ InfoSize = sizeof (ACPI_DEVICE_INFO); Type = Node->Type; Name = Node->Name.Integer; if (Node->Type == ACPI_TYPE_METHOD) { ParamCount = Node->Object->Method.ParamCount; } Status = AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE); if (ACPI_FAILURE (Status)) { return (Status); } if ((Type == ACPI_TYPE_DEVICE) || (Type == ACPI_TYPE_PROCESSOR)) { /* * Get extra info for ACPI Device/Processor objects only: * Run the Device _HID, _UID, _CLS, and _CID methods. * * Note: none of these methods are required, so they may or may * not be present for this device. The Info->Valid bitfield is used * to indicate which methods were found and run successfully. */ /* Execute the Device._HID method */ Status = AcpiUtExecute_HID (Node, &Hid); if (ACPI_SUCCESS (Status)) { InfoSize += Hid->Length; Valid |= ACPI_VALID_HID; } /* Execute the Device._UID method */ Status = AcpiUtExecute_UID (Node, &Uid); if (ACPI_SUCCESS (Status)) { InfoSize += Uid->Length; Valid |= ACPI_VALID_UID; } /* Execute the Device._CID method */ Status = AcpiUtExecute_CID (Node, &CidList); if (ACPI_SUCCESS (Status)) { /* Add size of CID strings and CID pointer array */ InfoSize += (CidList->ListSize - sizeof (ACPI_PNP_DEVICE_ID_LIST)); Valid |= ACPI_VALID_CID; } /* Execute the Device._CLS method */ Status = AcpiUtExecute_CLS (Node, &Cls); if (ACPI_SUCCESS (Status)) { InfoSize += Cls->Length; Valid |= ACPI_VALID_CLS; } } /* * Now that we have the variable-length data, we can allocate the * return buffer */ Info = ACPI_ALLOCATE_ZEROED (InfoSize); if (!Info) { Status = AE_NO_MEMORY; goto Cleanup; } /* Get the fixed-length data */ if ((Type == ACPI_TYPE_DEVICE) || (Type == ACPI_TYPE_PROCESSOR)) { /* * Get extra info for ACPI Device/Processor objects only: * Run the _ADR and, SxW, and _SxD methods. * * Notes: none of these methods are required, so they may or may * not be present for this device. The Info->Valid bitfield is used * to indicate which methods were found and run successfully. */ /* Execute the Device._ADR method */ Status = AcpiUtEvaluateNumericObject (METHOD_NAME__ADR, Node, &Info->Address); if (ACPI_SUCCESS (Status)) { Valid |= ACPI_VALID_ADR; } /* Execute the Device._SxW methods */ Status = AcpiUtExecutePowerMethods (Node, AcpiGbl_LowestDstateNames, ACPI_NUM_SxW_METHODS, Info->LowestDstates); if (ACPI_SUCCESS (Status)) { Valid |= ACPI_VALID_SXWS; } /* Execute the Device._SxD methods */ Status = AcpiUtExecutePowerMethods (Node, AcpiGbl_HighestDstateNames, ACPI_NUM_SxD_METHODS, Info->HighestDstates); if (ACPI_SUCCESS (Status)) { Valid |= ACPI_VALID_SXDS; } } /* * Create a pointer to the string area of the return buffer. * Point to the end of the base ACPI_DEVICE_INFO structure. */ NextIdString = ACPI_CAST_PTR (char, Info->CompatibleIdList.Ids); if (CidList) { /* Point past the CID PNP_DEVICE_ID array */ NextIdString += ((ACPI_SIZE) CidList->Count * sizeof (ACPI_PNP_DEVICE_ID)); } /* * Copy the HID, UID, and CIDs to the return buffer. The variable-length * strings are copied to the reserved area at the end of the buffer. * * For HID and CID, check if the ID is a PCI Root Bridge. */ if (Hid) { NextIdString = AcpiNsCopyDeviceId (&Info->HardwareId, Hid, NextIdString); if (AcpiUtIsPciRootBridge (Hid->String)) { Info->Flags |= ACPI_PCI_ROOT_BRIDGE; } } if (Uid) { NextIdString = AcpiNsCopyDeviceId (&Info->UniqueId, Uid, NextIdString); } if (CidList) { Info->CompatibleIdList.Count = CidList->Count; Info->CompatibleIdList.ListSize = CidList->ListSize; /* Copy each CID */ for (i = 0; i < CidList->Count; i++) { NextIdString = AcpiNsCopyDeviceId (&Info->CompatibleIdList.Ids[i], &CidList->Ids[i], NextIdString); if (AcpiUtIsPciRootBridge (CidList->Ids[i].String)) { Info->Flags |= ACPI_PCI_ROOT_BRIDGE; } } } if (Cls) { (void) AcpiNsCopyDeviceId (&Info->ClassCode, Cls, NextIdString); } /* Copy the fixed-length data */ Info->InfoSize = InfoSize; Info->Type = Type; Info->Name = Name; Info->ParamCount = ParamCount; Info->Valid = Valid; *ReturnBuffer = Info; Status = AE_OK; Cleanup: if (Hid) { ACPI_FREE (Hid); } if (Uid) { ACPI_FREE (Uid); } if (CidList) { ACPI_FREE (CidList); } if (Cls) { ACPI_FREE (Cls); } return (Status); } ACPI_EXPORT_SYMBOL (AcpiGetObjectInfo) /****************************************************************************** * * FUNCTION: AcpiInstallMethod * * PARAMETERS: Buffer - An ACPI table containing one control method * * RETURN: Status * * DESCRIPTION: Install a control method into the namespace. If the method * name already exists in the namespace, it is overwritten. The * input buffer must contain a valid DSDT or SSDT containing a * single control method. * ******************************************************************************/ ACPI_STATUS AcpiInstallMethod ( UINT8 *Buffer) { ACPI_TABLE_HEADER *Table = ACPI_CAST_PTR (ACPI_TABLE_HEADER, Buffer); UINT8 *AmlBuffer; UINT8 *AmlStart; char *Path; ACPI_NAMESPACE_NODE *Node; ACPI_OPERAND_OBJECT *MethodObj; ACPI_PARSE_STATE ParserState; UINT32 AmlLength; UINT16 Opcode; UINT8 MethodFlags; ACPI_STATUS Status; /* Parameter validation */ if (!Buffer) { return (AE_BAD_PARAMETER); } /* Table must be a DSDT or SSDT */ if (!ACPI_COMPARE_NAMESEG (Table->Signature, ACPI_SIG_DSDT) && !ACPI_COMPARE_NAMESEG (Table->Signature, ACPI_SIG_SSDT)) { return (AE_BAD_HEADER); } /* First AML opcode in the table must be a control method */ ParserState.Aml = Buffer + sizeof (ACPI_TABLE_HEADER); Opcode = AcpiPsPeekOpcode (&ParserState); if (Opcode != AML_METHOD_OP) { return (AE_BAD_PARAMETER); } /* Extract method information from the raw AML */ ParserState.Aml += AcpiPsGetOpcodeSize (Opcode); ParserState.PkgEnd = AcpiPsGetNextPackageEnd (&ParserState); Path = AcpiPsGetNextNamestring (&ParserState); MethodFlags = *ParserState.Aml++; AmlStart = ParserState.Aml; AmlLength = (UINT32) ACPI_PTR_DIFF (ParserState.PkgEnd, AmlStart); /* * Allocate resources up-front. We don't want to have to delete a new * node from the namespace if we cannot allocate memory. */ AmlBuffer = ACPI_ALLOCATE (AmlLength); if (!AmlBuffer) { return (AE_NO_MEMORY); } MethodObj = AcpiUtCreateInternalObject (ACPI_TYPE_METHOD); if (!MethodObj) { ACPI_FREE (AmlBuffer); return (AE_NO_MEMORY); } /* Lock namespace for AcpiNsLookup, we may be creating a new node */ Status = AcpiUtAcquireMutex (ACPI_MTX_NAMESPACE); if (ACPI_FAILURE (Status)) { goto ErrorExit; } /* The lookup either returns an existing node or creates a new one */ Status = AcpiNsLookup (NULL, Path, ACPI_TYPE_METHOD, ACPI_IMODE_LOAD_PASS1, ACPI_NS_DONT_OPEN_SCOPE | ACPI_NS_ERROR_IF_FOUND, NULL, &Node); (void) AcpiUtReleaseMutex (ACPI_MTX_NAMESPACE); if (ACPI_FAILURE (Status)) /* NsLookup */ { if (Status != AE_ALREADY_EXISTS) { goto ErrorExit; } /* Node existed previously, make sure it is a method node */ if (Node->Type != ACPI_TYPE_METHOD) { Status = AE_TYPE; goto ErrorExit; } } /* Copy the method AML to the local buffer */ memcpy (AmlBuffer, AmlStart, AmlLength); /* Initialize the method object with the new method's information */ MethodObj->Method.AmlStart = AmlBuffer; MethodObj->Method.AmlLength = AmlLength; MethodObj->Method.ParamCount = (UINT8) (MethodFlags & AML_METHOD_ARG_COUNT); if (MethodFlags & AML_METHOD_SERIALIZED) { MethodObj->Method.InfoFlags = ACPI_METHOD_SERIALIZED; MethodObj->Method.SyncLevel = (UINT8) ((MethodFlags & AML_METHOD_SYNC_LEVEL) >> 4); } /* * Now that it is complete, we can attach the new method object to * the method Node (detaches/deletes any existing object) */ Status = AcpiNsAttachObject (Node, MethodObj, ACPI_TYPE_METHOD); /* * Flag indicates AML buffer is dynamic, must be deleted later. * Must be set only after attach above. */ Node->Flags |= ANOBJ_ALLOCATED_BUFFER; /* Remove local reference to the method object */ AcpiUtRemoveReference (MethodObj); return (Status); ErrorExit: ACPI_FREE (AmlBuffer); ACPI_FREE (MethodObj); return (Status); } ACPI_EXPORT_SYMBOL (AcpiInstallMethod)