DXGKDDI_SETVIRTUALFUNCTIONPOWERSTATE - NtDoc

Native API online documentation, based on the System Informer (formerly Process Hacker) phnt headers 
// dispmprt.h

DXGKDDI_SETVIRTUALFUNCTIONPOWERSTATE DxgkddiSetvirtualfunctionpowerstate;

NTSTATUS DxgkddiSetvirtualfunctionpowerstate(
  [in] HANDLE Context,
  [in] DXGKARG_SETVIRTUALFUNCTIONPOWERSTATE *pArgs
)
{...}
View the official Windows Driver Kit DDI reference

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Windows Driver Kit DDI reference (nc-dispmprt-dxgkddi_setvirtualfunctionpowerstate)

DXGKDDI_SETVIRTUALFUNCTIONPOWERSTATE callback function

Description

This routine allows a non-privileged virtual machine to change the power state of a PCI Express SR-IOV Virtual Function.

Parameters

Context [in]

The miniport context that is returned by the driver in the DXGKDDI_SRIOV_INTERFACE structure.

pArgs [in]

A pointer to a DXGKARG_SETVIRTUALFUNCTIONPOWERSTATE structure.

Return value

Return STATUS_SUCCESS if the operation succeeds.

Prototype

//Declaration

DXGKDDI_SETVIRTUALFUNCTIONPOWERSTATE DxgkddiSetvirtualfunctionpowerstate;

// Definition

NTSTATUS DxgkddiSetvirtualfunctionpowerstate
(
    HANDLE Context
    DXGKARG_SETVIRTUALFUNCTIONPOWERSTATE * pArgs
)
{...}

Remarks

When all vGPUs are in a D3 state and if the Host doesn’t need the GPU, the physical GPU will be put into a D3 Cold state in which case the PF and all of the VF will become inaccessible until the GPU is powered up again. Upon power up we expect the same PF/VF configuration to be in effect as before the power down.

See also

View the official Windows Driver Kit DDI reference

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