Real Time. Real Time & Embedded Linux Solutions. Linux Kernel Device Drivers משך הקורס 40 שעות לימוד ותרגול בשיטת OJT

Transcription

1 Real Time Group LTD Real Time & Embedded Linux Solutions Linux Kernel Device Drivers משך הקורס 40 שעות לימוד ותרגול בשיטת OJT 1

2 Real Time Group is a multi-disciplinary dynamic and innovative Real-Time O.S. and Embedded Software Solutions Center, established in Providing Bare-Metal and Embedded Linux solutions, professional services and consulting, end-to-end flexible system infrastructure, outsourcing, integration and training services for Hardware, Software and RT-OS \ Embedded Systems. The company is divided into the following three Divisions: Real Time Group College Development Out-sourcing rt-ed.co.il rt-dev.com rt-hr.co.il Training Division: Professional Training Services for Hardware, Software, RT-OS and Embedded systems industries. We provide the knowledge and experience needed to enable professional engineers to Develop, Integrate and QA Hardware, Software and Networking Projects. In order to insure experience, all courses are practical hands-on-training. The latest Development, QA and Automation equipment which are adopted by the industry are used. All students are supplied with Development-Boards for home-work and course projects. 2

3 Course Overview: The Linux Kernel and Device Drivers targets engineers who wish to develop Linux based Kernel modules and device drivers. It's followed by dozens of class and home hands-on exercises and practices. The course starts by introducing the development tools \ environment, essentials of kernel development: kernel architecture, the main APIs, integration of device drivers with other parts of the kernel and with user applications, it goes through different device driver types starting from Character and Block devices and ending with PCIe drivers. Who should attend: HW C programmers who need to program on Linux operating systems. Embedded Linux Developers. Linux system programmers \ Engineers. Prerequisite: Knowledge of Linux administration (Linux Fundamentals). Knowledge in C programming language. 3

4 Linux Kernel and Device Drivers (40 AH) 1. Main characteristics (a) Getting the sources (Class Exercise-1) (b) Source Organization (c) Where is everything? 2. Linux Basic data structures (a) Doubly Linked Lists. (b) RB-trees structure (c) Radix tree 3. Linux Kernel overview (a) Why use Linux Kernel. (b) Supported Architectures. (c) Embedded Linux Distributions. (d) Linux File-System structure. (e) Kernel Version management. (f) What's new in 4.x. (g) System calls. 4. Scheduling in Linux (a) Process Scheduling in Linux (b) Processes, Threads and Tasks (c) Linux scheduling policies, (d) Linux Thread s life (e) Scheduler Classes (f) RT ver Normal policies. (g) The O(1 ) scheduler. (h) The CFS scheduler (i) Nice command effecting CFS 5. Developing Kernel Modules (Class Exercise-4) (a) What are Kernel Modules (b) Compiling a module (c) Kernel loggers (d) Passing arguments to a Modules 4

5 6. Character Device Drivers as LKMs (Class Exercise-5) (a) Simple Char Driver (b) Passing parameters to the module (c) Exporting symbols (d) File Operations 7. Kernel object model (a) Kobjects, (b) Ktypes, (c) Ksets, (d) Attributes, (e) Kernel Events 8. Sysfs Class Exercise-6) (a) Devices, (b) buses, (c) drivers, (d) subsystems 9. Udev (a) What is it used for (b) Uploading messages from kernel to user mode (c) Calling the right driver 10. Memory management (Class Exercise-7) (a) GFP Memory Allocation (Atomic \ Kernel) (b) Working with page frames (c) Contiguous virtual memory Allocation (d) Different allocators (SLAB \SLOB\SLUB) (e) Memory Caches (f) User space memory access 5

6 11. Linux Device Tree (a) Before the Device Tree (b) What is the Device Tree (c) Kernel with device tree (d) Device Tree source files and tools (e) Compiling a Device Tree Blob (f) Connecting the driver to the DT (g) reading properties from DTS (h) Atomic bit operations 12. I/O memory and ports (Class Exercise-9) (a) What are I/O Ports (b) What is Memory mapped I\O (c) Accessing I/O ports \ memory mapped I\O (d) Requesting I/O ports and I/O mapped memory (e) Caching issues (f) Managed APIs (g) Mapping I/O memory in virtual memory (h) Compiler Optimization and Hardware Reordering 13. Wait Queues (Class Exercise-10) (a) What are a waitqueues (b) Declaring a waitqueue (c) Waking up from a waitqueue (d) Exclusive sleeps 14. Interrupts and Exceptions (Class Exercise-11) (a) Behind the scene- do_irq() (b) low level handling (c) Interrupt disabling (d) Top & Bottom halves (e) Differed work (f) software interrupts (g) Tasklets (h) Work queues 6

7 15. Kernel Synchronization (a) How to avoid race conditions (b) Mutex (c) Spin Locks (d) Reader\Writer locks. (e) What to use when. (f) Deadlock situations. (g) Atomic variables. 16. Network Device Drivers (a) Allocation the network device (b) Registration the net_device structure (c) Probing the MAC & PHY chip (d) Working with Socket buffers (e) NIC Device initialization (f) Packet reception (g) Packet transmission (h) NAPI (i) Initializing device operation (j) Network queues (k) Implementing the Davicom MAC and PHY (100Mbps) 7

8 Appendix: 2. Platform Devices 3. Kernel Subsystems: (a) PCI Subsystem, Bus (Class Exercise-13) (b) Working with DMA Controller (c) USB Subsystem (Class Exercise-14) (d) Input Subsystem (Class Exercise-15) 4. Polled input subclass 5. Serial drivers 6. Kernel configuration (Class Exercise-2) 7. Compiling the kernel (Class Exercise-3) 8. Kernel Booting Sequence (What happens after the boot-loader) 9. Timing Measurements 10. RCUs הערות : פתיחת המסלול מותנה במספר נרשמים. המכללה מביאה ידעתם של המשתתפים שיתכנו שינוים בתוכן הקורסים ובמועדם. המכללה מתחייבת להודיע המשתתפים על כל שינוי. המכללה שומרת לעצמה את הזכות לשנות את תכני המסלול בהתאם לשיקול דעתה הבלעדית. 8