In this module, you will learn about the different types of Linux Kernel drivers and the kernel support for character device drivers. You will learn about fundamental driver data structures and functions for interacting with user space. You will understand the basics of Kernel debugging and how this differs from application debugging. You will implement a unit-tested circular buffer which will be used in future assignments. Finally, you will build a Yocto embedded device image with support for an out of tree kernel module.

In this module, you will learn the basics of concurrency in the Linux kernel, and how to use semaphore and mutex in your device driver to design for concurrent access. You will learn the difference between atomic and non atomic context and strategies for locking in each context. You will modify your socket application to interact with a custom character device based on your tested circular buffer implementation using the concurrency concepts discussed in the module.

In this module, you will learn the purpose and use of the ioctl command for Linux drivers and how the ioctl command is implemented in a driver. You will learn the basics of sleeping and waking up in the Linux kernel and how to handle blocking and non-blocking IO. You will modify your custom Linux kernel driver and Linux application to include ioctl support.