WDM drivers

WDM driver is classified into three types :

• Bus driver
• Function driver
• Filter driver

Function driver :

• A function driver is a specific individual device, such as a printer.

Bus driver :

• Bus driver uses individual buses like PCI, SCSI, and USB, adapter or bridges. It is reported to the child device that is connected to the bus.

Filter driver :

•  It is I/O request for a device, which is a class of device or bus device.