DXGKDDI_BUILDTESTCOMMANDBUFFER callback function (d3dkmddi.h)
KMD's DXGKDDI_BUILDTESTCOMMANDBUFFER function builds a test command buffer for kernel-mode testing.
Syntax
DXGKDDI_BUILDTESTCOMMANDBUFFER DxgkddiBuildtestcommandbuffer;
NTSTATUS DxgkddiBuildtestcommandbuffer(
IN_CONST_HANDLE hAdapter,
INOUT_PDXGKARG_BUILDTESTCOMMANDBUFFER pArgs
)
{...}
Parameters
hAdapter
[in] A handle to a context block that is associated with a display adapter. The kernel-mode display miniport driver (KMD) previously provided this handle to Dxgkrnl in the MiniportDeviceContext output parameter of the DxgkDdiAddDevice function.
pArgs
[in/out] Pointer to a DXGKARG_BUILDTESTCOMMANDBUFFER structure that describes the test command buffer to build.
Return value
DXGKDDI_BUILDTESTCOMMANDBUFFER returns NTSTATUS_SUCCESS if the function succeeds. Otherwise, it returns an appropriate NTSTATUS code such as STATUS_BUFFER_OVERFLOW.
Remarks
DXGKDDI_BUILDTESTCOMMANDBUFFER builds a command buffer with device-specific instructions for a set of simple commands. KMD returns a pointer to this function in pfnBuildTestCommandBuffer via DxgkDdiQueryFeatureInterface(DXGK_FEATURE_KERNEL_MODE_TESTING).
When pDmaBuffer is NULL or is too small, KMD needs to set the required size for the buffer in DmaBufferSize and return STATUS_BUFFER_OVERFLOW.
When pDmaBufferPrivateData is NULL or too small and KMD needs to generate private data, KMD needs to set the required size in DmaBufferPrivateDataSize and return STATUS_BUFFER_OVERFLOW.
The KMD must calculate the size of both buffers in the same call.
For more information, see Kernel-mode testing.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Windows 11, version 24H2 (WDDM 3.2) |
| Header | d3dkmddi.h |
| IRQL | PASSIVE_LEVEL |