FN_VMB_CHANNEL_GET_MMIO_SPACE callback function

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The VmbChannelGetMmioSpace function retrieves the kernel virtual address of the MMIO space allocated to a channel. This MMIO space is reserved via VmbServerChannelInitSetMmioMegabytes. This function is only valid after the open channel callback has been received.

Syntax

FN_VMB_CHANNEL_GET_MMIO_SPACE FnVmbChannelGetMmioSpace;

void FnVmbChannelGetMmioSpace(
  VMBCHANNEL Channel,
  UINT64 *MmioAddress,
  UINT64 *MmioSize
)
{...}

Parameters

Channel

A handle for the channel. Allocated by VmbChannelAllocate.

*MmioAddress

A pointer to a PVOID to fill with the MMIO physical address.

*MmioSize

A pointer to the returned size of the MMIO space.

Return Value

This function does not return a value.

Remarks

Important

This function is called through the VMBus Kernel Mode Client Library (KMCL) interface, provided by the Vmbkmcl.sys bus driver. This is a client function accessed from the KMCL_CLIENT_INTERFACE_V1 structure.

For more information, see the Remarks section of the KMCL_CLIENT_INTERFACE_V1.

Requirements

   
Minimum supported client Windows 10, version 1803
Header vmbuskernelmodeclientlibapi.h

See Also

VmbServerChannelInitSetMmioMegabytes

VmbChannelAllocate