The IoMapTransfer routine is obsolete and exported only to support existing drivers. See MapTransfer instead.
PHYSICAL_ADDRESS IoMapTransfer( IN PADAPTER_OBJECT AdapterObject, IN PMDL Mdl, IN PVOID MapRegisterBase, IN PVOID CurrentVa, IN OUT PULONG Length, IN BOOLEAN WriteToDevice );
Obsolete. This routine is exported only to support existing drivers. Use MapTransfer instead.