DXGKDDI_QUERYADAPTERINFO callback function (d3dkmddi.h)
The display miniport's (KMD's) DxgkDdiQueryAdapterInfo function retrieves configuration information from the graphics adapter.
Syntax
DXGKDDI_QUERYADAPTERINFO DxgkddiQueryadapterinfo;
NTSTATUS DxgkddiQueryadapterinfo(
[in] IN_CONST_HANDLE hAdapter,
[in] IN_CONST_PDXGKARG_QUERYADAPTERINFO pQueryAdapterInfo
)
{...}
Parameters
[in] hAdapter
A handle to a context block that is associated with a display adapter. The KMD previously provided this handle to Dxgkrnl in the MiniportDeviceContext output parameter of the DxgkDdiAddDevice function.
[in] pQueryAdapterInfo
A pointer to a DXGKARG_QUERYADAPTERINFO structure that the KMD fills with the configuration information for the graphics adapter.
Return value
DxgkDdiQueryAdapterInfo returns one of the following values:
| Return code | Description |
|---|---|
| STATUS_SUCCESS | DxgkDdiQueryAdapterInfo successfully retrieved the configuration information. |
| STATUS_INVALID_PARAMETER | Parameters that were passed to DxgkDdiQueryAdapterInfo contained errors that prevented it from completing. |
| STATUS_NO_MEMORY | DxgkDdiQueryAdapterInfo could not allocate memory that was required for it to complete. |
| STATUS_GRAPHICS_DRIVER_MISMATCH | The display miniport driver is not compatible with the user-mode display driver that initiated the call to DxgkDdiQueryAdapterInfo (that is, supplied private data for a query to the display miniport driver). |
Remarks
When the user-mode display driver calls the pfnQueryAdapterInfoCb function, a call to the DxgkDdiQueryAdapterInfo function is initiated.
If DxgkDdiQueryAdapterInfo receives the DXGKQAITYPE_UMDRIVERPRIVATE value in the Type member of the DXGKARG_QUERYADAPTERINFO structure that the pQueryAdapterInfo parameter points to, pOutputData points to a proprietary structure that KMD fills with the configuration information that is necessary for the user-mode display driver to identify the adapter.
If Dxgkrnl specifies the DXGKQAITYPE_DRIVERCAPS value in the Type member of DXGKARG_QUERYADAPTERINFO when the subsystem calls DxgkDdiQueryAdapterInfo, the display miniport driver should populate the provided DXGK_DRIVERCAPS structure with information that the subsystem can use.
If the DirectX graphics kernel subsystem supplies the DXGKQAITYPE_QUERYSEGMENT value in the Type member of DXGKARG_QUERYADAPTERINFO, the display miniport driver should provide information about the memory segments that it supports. For more information about memory segments, see Initializing Use of Memory Segments.
DxgkDdiQueryAdapterInfo should be made pageable.
All drivers that support WDDM 2.6 and greater must implement the DxgkDdiQueryAdapterInfo callback.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Windows Vista |
| Target Platform | Desktop |
| Header | d3dkmddi.h |
| IRQL | PASSIVE_LEVEL |