DXGKDDI_BUILDTESTCOMMANDBUFFER callback function (d3dkmddi.h)

项目
06/21/2024

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

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