Kernel modules
Download as PPTX, PDF0 likes719 views
This document discusses several important Android kernel modules. It begins by outlining key network modules like Netlink for IPC, network schedulers for packet sequencing, Netfilter for packet filtering, and Nftables as a new packet filtering framework. For sound, it describes ALSA as the software API for sound card drivers. Regarding graphics, it mentions the Direct Rendering Manager for interfacing with GPUs and configuring display modes, and the Graphics Execution Manager for managing graphics memory. Finally, it notes the evdev input driver handles input from devices like keyboards and mice.
Kernel modules
- 1. Android Kernel Modules By : Alaa Abdelmoneam (Elmagic) Egypt
- 2. Kernel Modules : •1-Network : -Netlink. -Network Scheduler. -Netfilter and nftables . 2-Sound : -Advanced Linux Sound Architecture .
- 3. Kernel Modules (Contd) •3- Graphics : -Direct rendering manager . -Graphics Execution manager . 4- Input : -evdev(event device).
- 4. Network •** Netlink ** Netlink is a socket family used for IPC between the kernel and user space processes, as well as between user processes (e.g. Unix domain sockets) or a mixture of both types. Netlink is a flexible, robust, wire-format communications channel typically used for kernel to user communication although it can also be used for user to user and kernel to kernel communications.
- 5. Network (Contd) •** Network Scheduler ** A network scheduler, also called packet scheduler, is an arbiter program that manages the sequence of network packets in the transmit and receive queues of the network interface controller, which is a circular data buffer. There are several network schedulers available for the different operating system kernels, that implement many of the existing network scheduling algorithms.
- 6. Network (Contd) •** Netfilter ** Netfilter is a framework inside the Linux kernel which offers flexibility for various networking-related operations to be implemented in form of customized handlers. Netfilter offers various options for packet filtering, network address translation, and port translation. These functions provide the functionality required for directing packets through a network, as well as for providing ability to prohibit packets from reaching sensitive locations within a computer network.
- 7. Network (Contd) •** Nftables ** nftables is the project that aims to replace the existing {ip,ip6,arp,eb}tables framework. Basically, this project provides a new packet filtering framework .
- 8. Sound •**Advanced Linux Sound Architecture** (ALSA) is a software framework and part of the Linux kernel that provides an application programming interface (API) for sound card device drivers. Some of the goals of the ALSA project at its inception were automatic configuration of sound-card hardware and graceful handling of multiple sound devices in a system, goals which it has largely met. ALSA is released under the GNU General Public License (GPL) and the GNU Lesser General Public License (LGPL).
- 9. Graphics •**Direct rendering manager** The Direct Rendering Manager (DRM) is a subsystem of the Linux kernel responsible for interfacing with GPUs of modern video cards. DRM exposes an API that user space programs can use to send commands and data to the GPU, and perform operations like configuring the mode setting of the display. The Direct Rendering Manager can be compiled into the Linux kernel or loaded via the standard module interface.
- 10. Graphics (Contd) •** Graphic Execution Manager** The Graphics Execution Manager (GEM) is a computer software system developed by Intel to do memory management for device drivers for graphics chipsets. GEM is part of the Direct Rendering Manager. GEM manages graphics memory (which means dealing with Non- Uniform Memory Access (NUMA) on modern graphics chipsets) and controls the execution context for graphics-related code
- 11. Input •**evdev** In computing, evdev (for event device) is a component of the Linux kernel for handling input (from keyboards, mice, joysticks, etc.) and a closely related input driver for both the X.Org Server and Wayland compositors.
- 12. Finally Contact Me : Facebook : https://www.facebook.com/elmagic.alaa.395