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_flee_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． PCl Drivers The PCI Interface A LookBackl． 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
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