/******************************************************************************
*
* Module Name: nsxfname - Public interfaces to the ACPI subsystem
* ACPI Namespace oriented interfaces
*
*****************************************************************************/
/*
* Copyright (C) 2000 - 2018, 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 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 <null Parent + relative path>
*/
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)
{
NextIdString = 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_NAME (Table->Signature, ACPI_SIG_DSDT) &&
!ACPI_COMPARE_NAME (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 = 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)