MappingAvailable method indicates that a new mapping is available.
This method has no parameters.
The port driver calls the
MappingAvailable method to notify the miniport driver that a new mapping has become available, but it does so only when the miniport driver's previous request for mapping through IPortWavePciStream::GetMapping has been refused.
The port driver (Portcls.sys) can call the
MappingAvailable method at any level equal to or below DISPATCH_LEVEL, depending on the circumstances under which the call is made. As a result, the
MappingAvailable method must be in a non-paged code segment and can only touch non-paged code.
See the discussion of allocator framing in WavePci Latency.
|Header||portcls.h (include Portcls.h)|
|IRQL||<= DISPATCH_LEVEL (see Remarks section)|