Design Options

These documents describe high-level implementation choices for a device driver.

• Kernel Extension
  This document describes how to implement a device driver as a kernel extension.
• API Export
  This document discusses how to export a device driver API.
• Multiple Unit Support
  This document describes how to support multiple units of hardware with a single device driver.
• Multiple Client Support
  This document describes how multiple clients can access a driver over a single logical channel.