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f-stack/freebsd/contrib/dev/acpica/components/resources/rsxface.c

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/*******************************************************************************
*
* Module Name: rsxface - Public interfaces to the resource manager
*
******************************************************************************/
/******************************************************************************
*
* 1. Copyright Notice
*
* Some or all of this work - Copyright (c) 1999 - 2020, 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 <contrib/dev/acpica/include/acpi.h>
#include <contrib/dev/acpica/include/accommon.h>
#include <contrib/dev/acpica/include/acresrc.h>
#include <contrib/dev/acpica/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_NAMESEG (Name, METHOD_NAME__CRS) &&
!ACPI_COMPARE_NAMESEG (Name, METHOD_NAME__PRS) &&
!ACPI_COMPARE_NAMESEG (Name, METHOD_NAME__AEI) &&
!ACPI_COMPARE_NAMESEG (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)
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