/******************************************************************************* * * Module Name: rsxface - Public interfaces to the resource manager * ******************************************************************************/ /****************************************************************************** * * 1. Copyright Notice * * Some or all of this work - Copyright (c) 1999 - 2018, 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 "acresrc.h" #include "acnamesp.h" #define _COMPONENT ACPI_RESOURCES ACPI_MODULE_NAME ("rsxface") /* Local macros for 16,32-bit to 64-bit conversion */ #define ACPI_COPY_FIELD(Out, In, Field) ((Out)->Field = (In)->Field) #define ACPI_COPY_ADDRESS(Out, In) \ ACPI_COPY_FIELD(Out, In, ResourceType); \ ACPI_COPY_FIELD(Out, In, ProducerConsumer); \ ACPI_COPY_FIELD(Out, In, Decode); \ ACPI_COPY_FIELD(Out, In, MinAddressFixed); \ ACPI_COPY_FIELD(Out, In, MaxAddressFixed); \ ACPI_COPY_FIELD(Out, In, Info); \ ACPI_COPY_FIELD(Out, In, Address.Granularity); \ ACPI_COPY_FIELD(Out, In, Address.Minimum); \ ACPI_COPY_FIELD(Out, In, Address.Maximum); \ ACPI_COPY_FIELD(Out, In, Address.TranslationOffset); \ ACPI_COPY_FIELD(Out, In, Address.AddressLength); \ ACPI_COPY_FIELD(Out, In, ResourceSource); /* Local prototypes */ static ACPI_STATUS AcpiRsMatchVendorResource ( ACPI_RESOURCE *Resource, void *Context); static ACPI_STATUS AcpiRsValidateParameters ( ACPI_HANDLE DeviceHandle, ACPI_BUFFER *Buffer, ACPI_NAMESPACE_NODE **ReturnNode); /******************************************************************************* * * FUNCTION: AcpiRsValidateParameters * * PARAMETERS: DeviceHandle - Handle to a device * Buffer - Pointer to a data buffer * ReturnNode - Pointer to where the device node is returned * * RETURN: Status * * DESCRIPTION: Common parameter validation for resource interfaces * ******************************************************************************/ static ACPI_STATUS AcpiRsValidateParameters ( ACPI_HANDLE DeviceHandle, ACPI_BUFFER *Buffer, ACPI_NAMESPACE_NODE **ReturnNode) { ACPI_STATUS Status; ACPI_NAMESPACE_NODE *Node; ACPI_FUNCTION_TRACE (RsValidateParameters); /* * Must have a valid handle to an ACPI device */ if (!DeviceHandle) { return_ACPI_STATUS (AE_BAD_PARAMETER); } Node = AcpiNsValidateHandle (DeviceHandle); if (!Node) { return_ACPI_STATUS (AE_BAD_PARAMETER); } if (Node->Type != ACPI_TYPE_DEVICE) { return_ACPI_STATUS (AE_TYPE); } /* * Validate the user buffer object * * if there is a non-zero buffer length we also need a valid pointer in * the buffer. If it's a zero buffer length, we'll be returning the * needed buffer size (later), so keep going. */ Status = AcpiUtValidateBuffer (Buffer); if (ACPI_FAILURE (Status)) { return_ACPI_STATUS (Status); } *ReturnNode = Node; return_ACPI_STATUS (AE_OK); } /******************************************************************************* * * FUNCTION: AcpiGetIrqRoutingTable * * PARAMETERS: DeviceHandle - Handle to the Bus device we are querying * RetBuffer - Pointer to a buffer to receive the * current resources for the device * * RETURN: Status * * DESCRIPTION: This function is called to get the IRQ routing table for a * specific bus. The caller must first acquire a handle for the * desired bus. The routine table is placed in the buffer pointed * to by the RetBuffer variable parameter. * * If the function fails an appropriate status will be returned * and the value of RetBuffer is undefined. * * This function attempts to execute the _PRT method contained in * the object indicated by the passed DeviceHandle. * ******************************************************************************/ ACPI_STATUS AcpiGetIrqRoutingTable ( ACPI_HANDLE DeviceHandle, ACPI_BUFFER *RetBuffer) { ACPI_STATUS Status; ACPI_NAMESPACE_NODE *Node; ACPI_FUNCTION_TRACE (AcpiGetIrqRoutingTable); /* Validate parameters then dispatch to internal routine */ Status = AcpiRsValidateParameters (DeviceHandle, RetBuffer, &Node); if (ACPI_FAILURE (Status)) { return_ACPI_STATUS (Status); } Status = AcpiRsGetPrtMethodData (Node, RetBuffer); return_ACPI_STATUS (Status); } ACPI_EXPORT_SYMBOL (AcpiGetIrqRoutingTable) /******************************************************************************* * * FUNCTION: AcpiGetCurrentResources * * PARAMETERS: DeviceHandle - Handle to the device object for the * device we are querying * RetBuffer - Pointer to a buffer to receive the * current resources for the device * * RETURN: Status * * DESCRIPTION: This function is called to get the current resources for a * specific device. The caller must first acquire a handle for * the desired device. The resource data is placed in the buffer * pointed to by the RetBuffer variable parameter. * * If the function fails an appropriate status will be returned * and the value of RetBuffer is undefined. * * This function attempts to execute the _CRS method contained in * the object indicated by the passed DeviceHandle. * ******************************************************************************/ ACPI_STATUS AcpiGetCurrentResources ( ACPI_HANDLE DeviceHandle, ACPI_BUFFER *RetBuffer) { ACPI_STATUS Status; ACPI_NAMESPACE_NODE *Node; ACPI_FUNCTION_TRACE (AcpiGetCurrentResources); /* Validate parameters then dispatch to internal routine */ Status = AcpiRsValidateParameters (DeviceHandle, RetBuffer, &Node); if (ACPI_FAILURE (Status)) { return_ACPI_STATUS (Status); } Status = AcpiRsGetCrsMethodData (Node, RetBuffer); return_ACPI_STATUS (Status); } ACPI_EXPORT_SYMBOL (AcpiGetCurrentResources) /******************************************************************************* * * FUNCTION: AcpiGetPossibleResources * * PARAMETERS: DeviceHandle - Handle to the device object for the * device we are querying * RetBuffer - Pointer to a buffer to receive the * resources for the device * * RETURN: Status * * DESCRIPTION: This function is called to get a list of the possible resources * for a specific device. The caller must first acquire a handle * for the desired device. The resource data is placed in the * buffer pointed to by the RetBuffer variable. * * If the function fails an appropriate status will be returned * and the value of RetBuffer is undefined. * ******************************************************************************/ ACPI_STATUS AcpiGetPossibleResources ( ACPI_HANDLE DeviceHandle, ACPI_BUFFER *RetBuffer) { ACPI_STATUS Status; ACPI_NAMESPACE_NODE *Node; ACPI_FUNCTION_TRACE (AcpiGetPossibleResources); /* Validate parameters then dispatch to internal routine */ Status = AcpiRsValidateParameters (DeviceHandle, RetBuffer, &Node); if (ACPI_FAILURE (Status)) { return_ACPI_STATUS (Status); } Status = AcpiRsGetPrsMethodData (Node, RetBuffer); return_ACPI_STATUS (Status); } ACPI_EXPORT_SYMBOL (AcpiGetPossibleResources) /******************************************************************************* * * FUNCTION: AcpiSetCurrentResources * * PARAMETERS: DeviceHandle - Handle to the device object for the * device we are setting resources * InBuffer - Pointer to a buffer containing the * resources to be set for the device * * RETURN: Status * * DESCRIPTION: This function is called to set the current resources for a * specific device. The caller must first acquire a handle for * the desired device. The resource data is passed to the routine * the buffer pointed to by the InBuffer variable. * ******************************************************************************/ ACPI_STATUS AcpiSetCurrentResources ( ACPI_HANDLE DeviceHandle, ACPI_BUFFER *InBuffer) { ACPI_STATUS Status; ACPI_NAMESPACE_NODE *Node; ACPI_FUNCTION_TRACE (AcpiSetCurrentResources); /* Validate the buffer, don't allow zero length */ if ((!InBuffer) || (!InBuffer->Pointer) || (!InBuffer->Length)) { return_ACPI_STATUS (AE_BAD_PARAMETER); } /* Validate parameters then dispatch to internal routine */ Status = AcpiRsValidateParameters (DeviceHandle, InBuffer, &Node); if (ACPI_FAILURE (Status)) { return_ACPI_STATUS (Status); } Status = AcpiRsSetSrsMethodData (Node, InBuffer); return_ACPI_STATUS (Status); } ACPI_EXPORT_SYMBOL (AcpiSetCurrentResources) /******************************************************************************* * * FUNCTION: AcpiGetEventResources * * PARAMETERS: DeviceHandle - Handle to the device object for the * device we are getting resources * InBuffer - Pointer to a buffer containing the * resources to be set for the device * * RETURN: Status * * DESCRIPTION: This function is called to get the event resources for a * specific device. The caller must first acquire a handle for * the desired device. The resource data is passed to the routine * the buffer pointed to by the InBuffer variable. Uses the * _AEI method. * ******************************************************************************/ ACPI_STATUS AcpiGetEventResources ( ACPI_HANDLE DeviceHandle, ACPI_BUFFER *RetBuffer) { ACPI_STATUS Status; ACPI_NAMESPACE_NODE *Node; ACPI_FUNCTION_TRACE (AcpiGetEventResources); /* Validate parameters then dispatch to internal routine */ Status = AcpiRsValidateParameters (DeviceHandle, RetBuffer, &Node); if (ACPI_FAILURE (Status)) { return_ACPI_STATUS (Status); } Status = AcpiRsGetAeiMethodData (Node, RetBuffer); return_ACPI_STATUS (Status); } ACPI_EXPORT_SYMBOL (AcpiGetEventResources) /****************************************************************************** * * FUNCTION: AcpiResourceToAddress64 * * PARAMETERS: Resource - Pointer to a resource * Out - Pointer to the users's return buffer * (a struct acpi_resource_address64) * * RETURN: Status * * DESCRIPTION: If the resource is an address16, address32, or address64, * copy it to the address64 return buffer. This saves the * caller from having to duplicate code for different-sized * addresses. * ******************************************************************************/ ACPI_STATUS AcpiResourceToAddress64 ( ACPI_RESOURCE *Resource, ACPI_RESOURCE_ADDRESS64 *Out) { ACPI_RESOURCE_ADDRESS16 *Address16; ACPI_RESOURCE_ADDRESS32 *Address32; if (!Resource || !Out) { return (AE_BAD_PARAMETER); } /* Convert 16 or 32 address descriptor to 64 */ switch (Resource->Type) { case ACPI_RESOURCE_TYPE_ADDRESS16: Address16 = ACPI_CAST_PTR ( ACPI_RESOURCE_ADDRESS16, &Resource->Data); ACPI_COPY_ADDRESS (Out, Address16); break; case ACPI_RESOURCE_TYPE_ADDRESS32: Address32 = ACPI_CAST_PTR ( ACPI_RESOURCE_ADDRESS32, &Resource->Data); ACPI_COPY_ADDRESS (Out, Address32); break; case ACPI_RESOURCE_TYPE_ADDRESS64: /* Simple copy for 64 bit source */ memcpy (Out, &Resource->Data, sizeof (ACPI_RESOURCE_ADDRESS64)); break; default: return (AE_BAD_PARAMETER); } return (AE_OK); } ACPI_EXPORT_SYMBOL (AcpiResourceToAddress64) /******************************************************************************* * * FUNCTION: AcpiGetVendorResource * * PARAMETERS: DeviceHandle - Handle for the parent device object * Name - Method name for the parent resource * (METHOD_NAME__CRS or METHOD_NAME__PRS) * Uuid - Pointer to the UUID to be matched. * includes both subtype and 16-byte UUID * RetBuffer - Where the vendor resource is returned * * RETURN: Status * * DESCRIPTION: Walk a resource template for the specified device to find a * vendor-defined resource that matches the supplied UUID and * UUID subtype. Returns a ACPI_RESOURCE of type Vendor. * ******************************************************************************/ ACPI_STATUS AcpiGetVendorResource ( ACPI_HANDLE DeviceHandle, char *Name, ACPI_VENDOR_UUID *Uuid, ACPI_BUFFER *RetBuffer) { ACPI_VENDOR_WALK_INFO Info; ACPI_STATUS Status; /* Other parameters are validated by AcpiWalkResources */ if (!Uuid || !RetBuffer) { return (AE_BAD_PARAMETER); } Info.Uuid = Uuid; Info.Buffer = RetBuffer; Info.Status = AE_NOT_EXIST; /* Walk the _CRS or _PRS resource list for this device */ Status = AcpiWalkResources ( DeviceHandle, Name, AcpiRsMatchVendorResource, &Info); if (ACPI_FAILURE (Status)) { return (Status); } return (Info.Status); } ACPI_EXPORT_SYMBOL (AcpiGetVendorResource) /******************************************************************************* * * FUNCTION: AcpiRsMatchVendorResource * * PARAMETERS: ACPI_WALK_RESOURCE_CALLBACK * * RETURN: Status * * DESCRIPTION: Match a vendor resource via the ACPI 3.0 UUID * ******************************************************************************/ static ACPI_STATUS AcpiRsMatchVendorResource ( ACPI_RESOURCE *Resource, void *Context) { ACPI_VENDOR_WALK_INFO *Info = Context; ACPI_RESOURCE_VENDOR_TYPED *Vendor; ACPI_BUFFER *Buffer; ACPI_STATUS Status; /* Ignore all descriptors except Vendor */ if (Resource->Type != ACPI_RESOURCE_TYPE_VENDOR) { return (AE_OK); } Vendor = &Resource->Data.VendorTyped; /* * For a valid match, these conditions must hold: * * 1) Length of descriptor data must be at least as long as a UUID struct * 2) The UUID subtypes must match * 3) The UUID data must match */ if ((Vendor->ByteLength < (ACPI_UUID_LENGTH + 1)) || (Vendor->UuidSubtype != Info->Uuid->Subtype) || (memcmp (Vendor->Uuid, Info->Uuid->Data, ACPI_UUID_LENGTH))) { return (AE_OK); } /* Validate/Allocate/Clear caller buffer */ Buffer = Info->Buffer; Status = AcpiUtInitializeBuffer (Buffer, Resource->Length); if (ACPI_FAILURE (Status)) { return (Status); } /* Found the correct resource, copy and return it */ memcpy (Buffer->Pointer, Resource, Resource->Length); Buffer->Length = Resource->Length; /* Found the desired descriptor, terminate resource walk */ Info->Status = AE_OK; return (AE_CTRL_TERMINATE); } /******************************************************************************* * * FUNCTION: AcpiWalkResourceBuffer * * PARAMETERS: Buffer - Formatted buffer returned by one of the * various Get*Resource functions * UserFunction - Called for each resource * Context - Passed to UserFunction * * RETURN: Status * * DESCRIPTION: Walks the input resource template. The UserFunction is called * once for each resource in the list. * ******************************************************************************/ ACPI_STATUS AcpiWalkResourceBuffer ( ACPI_BUFFER *Buffer, ACPI_WALK_RESOURCE_CALLBACK UserFunction, void *Context) { ACPI_STATUS Status = AE_OK; ACPI_RESOURCE *Resource; ACPI_RESOURCE *ResourceEnd; ACPI_FUNCTION_TRACE (AcpiWalkResourceBuffer); /* Parameter validation */ if (!Buffer || !Buffer->Pointer || !UserFunction) { return_ACPI_STATUS (AE_BAD_PARAMETER); } /* Buffer contains the resource list and length */ Resource = ACPI_CAST_PTR (ACPI_RESOURCE, Buffer->Pointer); ResourceEnd = ACPI_ADD_PTR ( ACPI_RESOURCE, Buffer->Pointer, Buffer->Length); /* Walk the resource list until the EndTag is found (or buffer end) */ while (Resource < ResourceEnd) { /* Sanity check the resource type */ if (Resource->Type > ACPI_RESOURCE_TYPE_MAX) { Status = AE_AML_INVALID_RESOURCE_TYPE; break; } /* Sanity check the length. It must not be zero, or we loop forever */ if (!Resource->Length) { return_ACPI_STATUS (AE_AML_BAD_RESOURCE_LENGTH); } /* Invoke the user function, abort on any error returned */ Status = UserFunction (Resource, Context); if (ACPI_FAILURE (Status)) { if (Status == AE_CTRL_TERMINATE) { /* This is an OK termination by the user function */ Status = AE_OK; } break; } /* EndTag indicates end-of-list */ if (Resource->Type == ACPI_RESOURCE_TYPE_END_TAG) { break; } /* Get the next resource descriptor */ Resource = ACPI_NEXT_RESOURCE (Resource); } return_ACPI_STATUS (Status); } ACPI_EXPORT_SYMBOL (AcpiWalkResourceBuffer) /******************************************************************************* * * FUNCTION: AcpiWalkResources * * PARAMETERS: DeviceHandle - Handle to the device object for the * device we are querying * Name - Method name of the resources we want. * (METHOD_NAME__CRS, METHOD_NAME__PRS, or * METHOD_NAME__AEI or METHOD_NAME__DMA) * UserFunction - Called for each resource * Context - Passed to UserFunction * * RETURN: Status * * DESCRIPTION: Retrieves the current or possible resource list for the * specified device. The UserFunction is called once for * each resource in the list. * ******************************************************************************/ ACPI_STATUS AcpiWalkResources ( ACPI_HANDLE DeviceHandle, char *Name, ACPI_WALK_RESOURCE_CALLBACK UserFunction, void *Context) { ACPI_STATUS Status; ACPI_BUFFER Buffer; ACPI_FUNCTION_TRACE (AcpiWalkResources); /* Parameter validation */ if (!DeviceHandle || !UserFunction || !Name || (!ACPI_COMPARE_NAME (Name, METHOD_NAME__CRS) && !ACPI_COMPARE_NAME (Name, METHOD_NAME__PRS) && !ACPI_COMPARE_NAME (Name, METHOD_NAME__AEI) && !ACPI_COMPARE_NAME (Name, METHOD_NAME__DMA))) { return_ACPI_STATUS (AE_BAD_PARAMETER); } /* Get the _CRS/_PRS/_AEI/_DMA resource list */ Buffer.Length = ACPI_ALLOCATE_LOCAL_BUFFER; Status = AcpiRsGetMethodData (DeviceHandle, Name, &Buffer); if (ACPI_FAILURE (Status)) { return_ACPI_STATUS (Status); } /* Walk the resource list and cleanup */ Status = AcpiWalkResourceBuffer (&Buffer, UserFunction, Context); ACPI_FREE (Buffer.Pointer); return_ACPI_STATUS (Status); } ACPI_EXPORT_SYMBOL (AcpiWalkResources)