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
synchronization Key Features Delve into hardware interrupt
handling, threaded IRQs, tasklets, softirqs, and understand which
to use when Explore powerful techniques to perform user-kernel
interfacing, peripheral I/O and use kernel mechanisms Work with key
kernel synchronization primitives to solve kernel concurrency
issues Book 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. You'll 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. You'll 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. You'll also explore
the practical usage of useful kernel mechanisms, setting up delays,
timers, kernel threads, and workqueues. Finally, you'll 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, you'll have learned the fundamentals of writing Linux
character device driver code for real-world projects and products.
What you will learn Get to grips with the basics of the modern
Linux Device Model (LDM) Write a simple yet complete misc class
character device driver Perform user-kernel interfacing using
popular methods Understand and handle hardware interrupts
confidently Perform I/O on peripheral hardware chip memory Explore
kernel APIs to work with delays, timers, kthreads, and workqueues
Understand kernel concurrency issues Work with key kernel
synchronization primitives and discover how to detect and avoid
deadlock Who 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.
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