Linux Device Drivers

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