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Preface 
1. An Introduction to Device Drivers

      The Role of the Device Driver 

      Splitting the Kernel 

      Classes of Devices and Modules 

      Security Issues 

      Version Numbering 

      License Terms 

      Joining the Kernel Development Community 

      Overview of the Book 
2. Building and Running Modules

      Setting Up Your Test System 

      The Hello World Module 

      Kernel Modules Versus Applications 

      Compiling and Loading 

      The Kernel Symbol Table 

      Preliminaries 

      Initialization and Shutdown 

      Module Parameters 

      Doing It in User Space 

      Quick Reference 
3. Char Drivers

      The Design of scull 

      Major and Minor Numbers 

      Some Important Data Structures 

      Char Device Registration 

      open and release 

      scull's Memory Usage 

      read and write 

      Playing with the New Devices 

      Quick Reference 
4. Debugging Techniques

      Debugging Support in the Kernel 

      Debugging by Printing 

      Debugging by Querying 

      Debugging by Watching 

      Debugging System Faults 

      Debuggers and Related Tools 
5. Concurrency and Race Conditions

      Pitfalls in scull 

      Concurrency and Its Management 

      Semaphores and Mutexes 

      Completions 

      Spinlocks 

      Locking Traps 

      Alternatives to Locking 

      Quick Reference 
6. Advanced Char Driver Operations

      ioctl 

      Blocking I/O 

      poll and select 

      Asynchronous Notification 

      Seeking a Device 

      Access Control on a Device File 

      Quick Reference 
7. Time, Delays, and Deferred Work

      Measuring Time Lapses 

      Knowing the Current Time 

      Delaying Execution 

      Kernel Timers 

      Tasklets 

      Workqueues 

      Quick Reference 
8. Allocating Memory

      The Real Story of kmalloc 

      Lookaside Caches 

      get_free_page and Friends 

      vmalloc and Friends 

      Per-CPU Variables 

      Obtaining Large Buffers 

      Quick Reference 
9. Communicating with Hardware

      I/O Ports and I/O Memory 

      Using I/O Ports 

      An I/O Port Example 

      Using I/O Memory 

      Quick Reference 
10. Interrupt Handling

      Preparing the Parallel Port 

      Installing an Interrupt Handler 

      Implementing a Handler 

      Top and Bottom Halves 

      Interrupt Sharing 

      Interrupt-Driven I/O 

      Quick Reference 
11. Data Types in the Kernel

      Use of Standard C Types 

      Assigning an Explicit Size to Data Items 

      Interface-Specific Types 

      Other Portability Issues 

      Linked Lists 

      Quick Reference 
12. PCI Drivers

      The PCI Interface 

      A Look Back: ISA 

      PC/104 and PC/104+ 

      Other PC Buses 

      SBus 

      NuBus 

      External Buses 

      Quick Reference 
13. USB Drivers

      USB Device Basics 

      USB and Sysfs 

      USB Urbs 

      Writing a USB Driver 

      USB Transfers Without Urbs 

      Quick Reference 
14. The Linux Device Model

      Kobjects, Ksets, and Subsystems 

      Low-Level Sysfs Operations 

      Hotplug Event Generation 

      Buses, Devices, and Drivers 

      Classes 

      Putting It All Together 

      Hotplug 

      Dealing with Firmware 

      Quick Reference 
15. Memory Mapping and DMA

      Memory Management in Linux 

      The mmap Device Operation 

      Performing Direct I/O 

      Direct Memory Access 

      Quick Reference 
16. Block Drivers

      Registration 

      The Block Device Operations 

      Request Processing 

      Some Other Details 

      Quick Reference 
17. Network Drivers

      How snull Is Designed 

      Connecting to the Kernel 

      The net_device Structure in Detail 

      Opening and Closing 

      Packet Transmission 

      Packet Reception 

      The Interrupt Handler 

      Receive Interrupt Mitigation 

      Changes in Link State 

      The Socket Buffers 

      MAC Address Resolution 

      Custom ioctl Commands 

      Statistical Information 

      Multicast 

      A Few Other Details 

      Quick Reference 
18. TTY Drivers

      A Small TTY Driver 

      tty_driver Function Pointers 

      TTY Line Settings 

      ioctls 

      proc and sysfs Handling of TTY Devices 

      The tty_driver Structure in Detail 

      The tty_operations Structure in Detail 

      The tty_struct Structure in Detail 

      Quick Reference 
Bibliography 
Index