FN_VMB_CHANNEL_GET_MMIO_SPACE callback function

Description

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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.

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.

Prototype

//Declaration

FN_VMB_CHANNEL_GET_MMIO_SPACE FnVmbChannelGetMmioSpace;

// Definition

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

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.

See also

VmbServerChannelInitSetMmioMegabytes

VmbChannelAllocate