WdfIoResourceListAppendDescriptor function (wdfresource.h)

Artikel
04/18/2022

[Applies to KMDF only]

The WdfIoResourceListAppendDescriptor method adds a resource descriptor to the end of a resource requirements list's logical configuration.

Syntax

NTSTATUS WdfIoResourceListAppendDescriptor(
  [in] WDFIORESLIST            ResourceList,
  [in] PIO_RESOURCE_DESCRIPTOR Descriptor
);

Parameters

[in] ResourceList

A handle to a framework resource-range-list object that represents a logical configuration of hardware resources for a device.

[in] Descriptor

A pointer to an IO_RESOURCE_DESCRIPTOR structure that describes a hardware resource.

Return value

WdfIoResourceListAppendDescriptor returns STATUS_SUCCESS if the operation succeeds. Otherwise, this method might return one of the following values:

Return code	Description
STATUS_INVALID_PARAMETER	An invalid parameter was specified.
STATUS_ACCESS_DENIED	The driver was not allowed to add descriptors to the logical configuration that the ResourceList parameter specified.
STATUS_INSUFFICIENT_RESOURCES	The framework could not allocate space to store the descriptor.

A system bug check occurs if the driver supplies an invalid object handle.

Remarks

The framework copies the contents of the IO_RESOURCE_DESCRIPTOR structure that the Descriptor parameter points to into internal storage, so the driver routine that calls WdfIoResourceListAppendDescriptor can allocate the structure locally. After the driver calls WdfIoResourceListAppendDescriptor, the driver can reuse the IO_RESOURCE_DESCRIPTOR structure.

For more information about resource requirements lists and logical configurations, see Hardware Resources for Framework-Based Drivers.

Examples

The following code example creates an empty logical configuration and adds it to a resource requirements list. Then, the example initializes a resource descriptor and adds the descriptor to the logical configuration.

IO_RESOURCE_DESCRIPTOR  descriptor;
NTSTATUS  status;
WDFIORESLIST  logConfig;

status = WdfIoResourceListCreate(
                                 RequirementsList,
                                 WDF_NO_OBJECT_ATTRIBUTES,
                                 &logConfig
                                 );
if (!NT_SUCCESS(status)) {
    return status;
}

status = WdfIoResourceRequirementsListAppendIoResList(
                                                      RequirementsList,
                                                      logConfig
                                                      );
if (!NT_SUCCESS(status)) {
    return status;
}

RtlZeroMemory(
              &descriptor,
              sizeof(descriptor)
              );

descriptor.Option = 0;
descriptor.Type = CmResourceTypePort;
descriptor.ShareDisposition = CmResourceShareDeviceExclusive;
descriptor.Flags = CM_RESOURCE_PORT_IO|CM_RESOURCE_PORT_16_BIT_DECODE;
descriptor.u.Port.Length = 1;
descriptor.u.Port.Alignment = 0x01;
descriptor.u.Port.MinimumAddress.QuadPart = 0;
descriptor.u.Port.MaximumAddress.QuadPart = 0xFFFF;

status = WdfIoResourceListAppendDescriptor(
                                           logConfig,
                                           &descriptor
                                           );

Requirements

Requirement	Value
Target Platform	Universal
Minimum KMDF version	1.0
Header	wdfresource.h (include Wdf.h)
Library	Wdf01000.sys (see Framework Library Versioning.)
IRQL	<=DISPATCH_LEVEL
DDI compliance rules	DriverCreate(kmdf), KmdfIrql(kmdf), KmdfIrql2(kmdf), KmdfIrqlExplicit(kmdf)

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