This article describes system-supplied, kernel-mode interfaces provided through the DirectX graphics kernel subsystem (Dxgkrnl.sys).
- The display port driver is a part of Dxgkrnl.sys.
- 核心模式顯示迷你埠驅動程式 （KMD） 是由圖形硬體廠商實作。
For descriptions of other functions implemented by Dxgkrnl, see articles such as:
Dxgkrnl Interface
A KMD's DriverEntry function calls the operating system's DxgkInitialize function, which causes Dxgkrnl to be loaded and initialized.
Once loaded, Dxgkrnl.sys provides the KMD with pointers to its functions by passing a DXGKRNL_INTERFACE structure to the KMD's DxgkDdiStartDevice function. Dxgkrnl's function pointers have a DxgkCb prefix.
The DXGKRNL_INTERFACE structure also contains a handle to a particular display adapter. 顯示埠驅動程式會產生此控制代碼。 The KMD passes this handle as an argument each time it calls any of the functions in DXGKRNL_INTERFACE.
顯示埠驅動程式介面
The KMD gets the display port driver's interfaces by calling Dxgkrnl's DxgkCbQueryServices function with a DXGK_SERVICES value that specifies the type of interface that the KMD wants. 顯示埠驅動程式所提供的服務包括 AGP（加速圖形埠）服務、偵錯報表服務、計時作業服務等等。