DXGKARG_CREATEDOORBELL structure (d3dkmddi.h)

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The DXGKARG_CREATEDOORBELL structure contains parameters for KMD's DxgkDdiCreateDoorbell callback function.

Syntax

typedef struct _DXGKARG_CREATEDOORBELL {
  HANDLE                       hHwQueue;
  HANDLE                       hDoorbell;
  UINT                         PrivateDriverDataSize;
  void                         *PrivateDriverData;
  HANDLE                       hRingBuffer;
  HANDLE                       hRingBufferControl;
  DXGKARG_CREATEDOORBELL_FLAGS Flags;
} DXGKARG_CREATEDOORBELL;

Members

hHwQueue

[in] Handle to a KMD hardware queue object, which was created in a previous call to D3DKMTCreateHwQueue.

hDoorbell

[in/out] As input, contains the OS's handle to the doorbell. KMD can store the input handle in its tracking structures. As output, hDoorbell contains KMD's kernel-mode handle to the doorbell.

PrivateDriverDataSize

[in] Size, in bytes, of the driver's private data that is associated with the doorbell.

PrivateDriverData

[in/out] Pointer to the driver's private data that is associated with the doorbell.

hRingBuffer

[in] Handle to the ring buffer allocation previously created by UMD. This allocation is GPU visible and already resident. The ResizeRingBufferOperation flag is a hint from UMD to KMD that a doorbell is being recreated for this hardware queue with a new, resized ring buffer.

hRingBufferControl

[in] KMD handle to a ring buffer control allocation previously created by UMD. UMD and KMD can use this allocation as a control area to store ring buffer read/write pointer locations if required. The allocation must be GPU visible and already resident.

Flags

A bit field of DXGKARG_CREATEDOORBELL_FLAGS values specifying the doorbell creation flags.

Requirements

Requirement	Value
Minimum supported client	WIN11_FUTURE
Header	d3dkmddi.h

See also

D3DKMTCreateAllocation

DXGKARG_CREATEDOORBELL_FLAGS

DxgkDdiCreateDoorbell