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NdisMUnmapIoSpace (NDIS 5.1) function

Note   NDIS 5. x has been deprecated and is superseded by NDIS 6. x. For new NDIS driver development, see Network Drivers Starting with Windows Vista. For information about porting NDIS 5. x drivers to NDIS 6. x, see Porting NDIS 5.x Drivers to NDIS 6.0.

NdisMUnmapIoSpace releases a virtual range mapped by an initialization-time call to NdisMMapIoSpace.

Syntax


VOID NdisMUnmapIoSpace(
  _In_ NDIS_HANDLE MiniportAdapterHandle,
  _In_ PVOID       VirtualAddress,
  _In_ UINT        Length
);

Parameters

MiniportAdapterHandle [in]

Specifies the handle originally input to MiniportInitialize.

VirtualAddress [in]

Specifies the base virtual address for the mapped range that was returned by NdisMMapIoSpace.

Length [in]

Specifies the number of bytes in the range that was mapped with NdisMMapIoSpace.

Return value

None

Remarks

When a miniport driver is unloading, any memory range that it mapped during initialization with NdisMMapIoSpace must be released with a call to NdisMUnmapIoSpace.

The Length passed to NdisMUnmapIoSpace must match the Length originally passed to NdisMMapIoSpace.

NdisMUnmapIoSpace can be called only from a NIC driver's MiniportInitialize and MiniportHalt functions.

Requirements

Target platform

Universal

Version

See NdisMUnmapIoSpace.

Header

Ndis.h (include Ndis.h)

Library

Ndis.lib

IRQL

PASSIVE_LEVEL

See also

MiniportHalt
MiniportInitialize
NdisMMapIoSpace

 

 

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