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Resources: New interface, AcpiWalkResourceBuffer.

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Implements a new interface for walking resource lists that it
at a lower level than the existing AcpiWalkResources.
(Method is not executed.)
This commit is contained in:
Robert Moore 2012-11-14 12:55:26 -08:00
parent 03eda6d584
commit 76a480aa64
3 changed files with 86 additions and 32 deletions
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108
source/components/resources/rsxface.c
View File

@ -546,7 +546,7 @@ ACPI_EXPORT_SYMBOL (AcpiResourceToAddress64)
*
* RETURN: Status
*
* DESCRIPTION: Walk a resource template for the specified evice to find a
* 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.
*
@ -658,63 +658,45 @@ AcpiRsMatchVendorResource (
/*******************************************************************************
*
* FUNCTION: AcpiWalkResources
* FUNCTION: AcpiWalkResourceBuffer
*
* 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)
* 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: Retrieves the current or possible resource list for the
* specified device. The UserFunction is called once for
* each resource in the list.
* DESCRIPTION: Walks the input resource template. The UserFunction is called
* once for each resource in the list.
*
******************************************************************************/
ACPI_STATUS
AcpiWalkResources (
ACPI_HANDLE DeviceHandle,
char *Name,
AcpiWalkResourceBuffer (
ACPI_BUFFER *Buffer,
ACPI_WALK_RESOURCE_CALLBACK UserFunction,
void *Context)
{
ACPI_STATUS Status;
ACPI_BUFFER Buffer;
ACPI_STATUS Status = AE_OK;
ACPI_RESOURCE *Resource;
ACPI_RESOURCE *ResourceEnd;
ACPI_FUNCTION_TRACE (AcpiWalkResources);
ACPI_FUNCTION_TRACE (AcpiWalkResourceBuffer);
/* 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)))
if (!Buffer || !Buffer->Pointer || !UserFunction)
{
return_ACPI_STATUS (AE_BAD_PARAMETER);
}
/* Get the _CRS/_PRS/_AEI resource list */
/* Buffer contains the resource list and length */
Buffer.Length = ACPI_ALLOCATE_LOCAL_BUFFER;
Status = AcpiRsGetMethodData (DeviceHandle, Name, &Buffer);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
/* Buffer now contains the resource list */
Resource = ACPI_CAST_PTR (ACPI_RESOURCE, Buffer.Pointer);
ResourceEnd = ACPI_ADD_PTR (ACPI_RESOURCE, Buffer.Pointer, Buffer.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) */
@ -754,6 +736,68 @@ AcpiWalkResources (
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)
* 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)))
{
return_ACPI_STATUS (AE_BAD_PARAMETER);
}
/* Get the _CRS/_PRS/_AEI 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);
}

6
source/include/acpixf.h
View File

@ -689,6 +689,12 @@ AcpiGetEventResources (
ACPI_HANDLE DeviceHandle,
ACPI_BUFFER *RetBuffer);
ACPI_STATUS
AcpiWalkResourceBuffer (
ACPI_BUFFER *Buffer,
ACPI_WALK_RESOURCE_CALLBACK UserFunction,
void *Context);
ACPI_STATUS
AcpiWalkResources (
ACPI_HANDLE Device,

4
source/include/actypes.h
View File

@ -976,6 +976,10 @@ typedef struct acpi_buffer
} ACPI_BUFFER;
/* Free a buffer created in an ACPI_BUFFER via ACPI_ALLOCATE_LOCAL_BUFFER */
#define ACPI_FREE_BUFFER(b) ACPI_FREE(b.Pointer)
/*
* NameType for AcpiGetName