Porting I/O Queues

WDF drivers create queues and register I/O event callbacks in the EvtDriverDeviceAdd callback. By default, each I/O queue object is the child of a device object. The WDF driver can configure the following tasks for each queue:

• Which I/O request types are directed to the queue.
• Whether requests are dispatched in parallel (as soon as they arrive), sequentially (one at a time), or manually (upon driver request).
• Whether I/O event callback routines are called concurrently or serially.
• Whether the framework or the driver manages the queue through system and device power transitions.

For more information about creating queues, see Creating I/O Queues