Linux Kernel Programming Part 2 - Char Device Drivers and Kernel Synchronization: Create user-kernel interfaces work with peripheral I/O and handle hardware interrupts

Discover how to write high-quality character driver code interface with userspace work with chip memory and gain an in-depth understanding of working with hardware interrupts and kernel synchronizationKey FeaturesDelve into hardware interrupt handling threaded IRQs tasklets softirqs and understand which to use whenExplore powerful techniques to perform user-kernel interfacing peripheral I/O and use kernel mechanismsWork with key kernel synchronization primitives to solve kernel concurrency issuesBook DescriptionLinux Kernel Programming Part 2 - Char Device Drivers and Kernel Synchronization is an ideal companion guide to the Linux Kernel Programming book. This book provides a comprehensive introduction for those new to Linux device driver development and will have you up and running with writing misc class character device driver code (on the 5.4 LTS Linux kernel) in next to no time. Youll begin by learning how to write a simple and complete misc class character driver before interfacing your driver with user-mode processes via procfs sysfs debugfs netlink sockets and ioctl. Youll then find out how to work with hardware I/O memory. The book covers working with hardware interrupts in depth and helps you understand interrupt request (IRQ) allocation threaded IRQ handlers tasklets and softirqs. Youll also explore the practical usage of useful kernel mechanisms setting up delays timers kernel threads and workqueues. Finally youll discover how to deal with the complexity of kernel synchronization with locking technologies (mutexes spinlocks and atomic/refcount operators) including more advanced topics such as cache effects a primer on lock-free techniques deadlock avoidance (with lockdep) and kernel lock debugging techniques. By the end of this Linux kernel book youll have learned the fundamentals of writing Linux character device driver code for real-world projects and products.What you will learnGet to grips with the basics of the modern Linux Device Model (LDM)Write a simple yet complete misc class character device driverPerform user-kernel interfacing using popular methodsUnderstand and handle hardware interrupts confidentlyPerform I/O on peripheral hardware chip memoryExplore kernel APIs to work with delays timers kthreads and workqueuesUnderstand kernel concurrency issuesWork with key kernel synchronization primitives and discover how to detect and avoid deadlockWho this book is forAn understanding of the topics covered in the Linux Kernel Programming book is highly recommended to make the most of this book. This book is for Linux programmers beginning to find their way with device driver development. Linux device driver developers looking to overcome frequent and common kernel/driver development issues as well as perform common driver tasks such as user-kernel interfaces performing peripheral I/O handling hardware interrupts and dealing with concurrency will benefit from this book. A basic understanding of Linux kernel internals (and common APIs) kernel module development and C programming is required.