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This function releases a virtual range mapped by an initialization-time call to the NdisMMapIoSpacefunction.
VOID NdisMUnmapIoSpace( IN NDIS_HANDLE MiniportAdapterHandle , IN PVOID VirtualAddress , IN UINT Length );
Parameters
- MiniportAdapterHandle
- Handle originally input to the MiniportInitializefunction.
- VirtualAddress
- Specifies the base virtual address for the mapped range that was returned by the NdisMMapIoSpacefunction.
- Length
- Specifies the number of bytes in the range that was mapped with
NdisMMapIoSpace.
Remarks
When a miniport is unloading, any memory range that it mapped during initialization with NdisMMapIoSpacemust be released with a call to this function.
The Lengthpassed to this function must match the Lengthoriginally passed to NdisMMapIoSpace.
This function can be called only from an NIC driver's MiniportInitializeand MiniportHaltfunctions.
A driver that calls this function runs at IRQL PASSIVE_LEVEL.
Requirements
Runs on Versions Defined in Include Link to Windows CE OS 2.0 and later Ndis.h Note This API is part of the complete Windows CE OS package as provided by Microsoft. The functionality of a particular platform is determined by the original equipment manufacturer (OEM) and some devices may not support this API.
See Also
Last updated on Tuesday, July 13, 2004