DXGKCB_WRITE_DEVICE_SPACE callback function

The DxgkCbWriteDeviceSpace function writes to a device configuration space or the expansion ROM of a display adapter.

Syntax

DXGKCB_WRITE_DEVICE_SPACE DxgkcbWriteDeviceSpace;

NTSTATUS DxgkcbWriteDeviceSpace(
  HANDLE DeviceHandle,
  ULONG DataType,
  PVOID Buffer,
  ULONG Offset,
  ULONG Length,
  PULONG BytesWritten
)
{...}

Parameters

DeviceHandle

A handle that represents a display adapter. The display miniport driver previously obtained this handle in the DeviceHandle member of the DXGKRNL_INTERFACE structure that was passed to DxgkDdiStartDevice.

DataType

The type of write transaction to be performed. This parameter must be one of the following values, which are defined in Dispmprt.h:

DXGK_WHICHSPACE_BRIDGE

Write to the parent bus device's configuration space.

DXGK_WHICHSPACE_CONFIG

Write to the display adapter's configuration space.

DXGK_WHICHSPACE_MCH

Write to the configuration space of a memory controller hub that is a peer to the adapter's parent bus.

DXGK_WHICHSPACE_ROM

Write to the display adapter's expansion ROM.

Buffer

A pointer to a buffer that supplies the data to be written to the configuration space.

Offset

The offset, in bytes, into the configuration space, at which the write transaction begins.

Length

The number of bytes to be written.

BytesWritten

A pointer to a ULONG-typed variable that receives the number of bytes actually written.

Return Value

DxgkCbWriteDeviceSpace returns one of the following values:

Return code Description
STATUS_SUCCESS The function succeeded.
STATUS_INVALID_PARAMETER The DeviceHandle, DataType, or Buffer parameter is invalid.
STATUS_UNSUCCESSFUL The function was unable to write the data.

Requirements

   
Minimum supported client Available in Windows Vista and later versions of the Windows operating systems.
Target Platform Desktop
Header dispmprt.h (include Dispmprt.h)
IRQL PASSIVE_LEVEL

See Also

DxgkCbReadDeviceSpace