General I/O targets do not support special, device-specific data formats, such as USB request blocks. Before drivers send data to a general I/O target, they must put data into a write buffer in a format that the I/O target can interpret. Likewise, when drivers read data from a general I/O target, the drivers must be able interpret the contents of data buffers that they receive from the target.
General I/O targets are either local or remote:
Local I/O Targets
Each framework-based function driver, filter driver, and miniport driver has a local I/O target for each of the driver's devices. A device's local I/O target is always the next-lower driver in the driver stack.
This section includes: