1. Computers
  2. Display Drivers
  3. Graphics Cards
  4. Memory
  5. Motherboards
  6. Processors
  7. Software
  8. Storage
  9. Operating Systems


Facebook RSS Twitter Twitter Google Plus


Phoronix Test Suite

OpenBenchmarking.org

Last Minute For Linux 3.4: DMA-BUF PRIME Support

Linux Kernel

Published on 30 March 2012 10:13 AM EDT
Written by Michael Larabel in Linux Kernel
5 Comments

David Airlie has a last-minute pull request for the Linux 3.4 kernel following last week's main DRM pull. This latest Git pull request is set to introduce DMA-BUF PRIME support in the mainline kernel.

What this work does is setup the DRM DMA-BUF interface layer that they call PRIME. The initial DMA-BUF support, worked on by Linaro developers and others, was pushed into the Linux 3.3 kernel but isn't widely used yet in the mainline tree. For those not familiar with the DMA-BUF buffer sharing infrastructure for the kernel, see DMA-BUF Is Ready To Push Forward Linux Drivers and NVIDIA Talks Of Optimus Possibilities For Linux. This work is especially important for ARM hardware and graphics drivers.

The PRIME pull for Linux 3.4 doesn't implement any driver support, but is just the underlying work to make this DMA-BUF implementation available to DRM drivers. They hope to have something ready in terms of driver implementation for the next kernel cycle (the Linux 3.5 kernel). At the moment there is work on Nouveau, i915, UDL (DisplayLink), Samsung Exynos, and Texas Instruments OMAP for taking advantage of this open-source work. There's also VGEM involvement.

This new work is exposed via the DMA_SHARED_BUFFER kernel configuration option and automatically enabled for building when building DRM driver support.

The DMA-BUF PRIME pull request can be viewed at LKML.org.

About The Author
Michael Larabel is the principal author of Phoronix.com and founded the web-site in 2004 with a focus on enriching the Linux hardware experience and being the largest web-site devoted to Linux hardware reviews, particularly for products relevant to Linux gamers and enthusiasts but also commonly reviewing servers/workstations and embedded Linux devices. Michael has written more than 10,000 articles covering the state of Linux hardware support, Linux performance, graphics hardware drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated testing software. He can be followed via and or contacted via .
Latest Linux Hardware Reviews
  1. Rosewill RS-MI-01: An Ultra Low-Cost Mini-ITX Chassis
  2. D-Link DCS-2330L HD Wireless Network Camera
  3. Gigabyte AM1M-S2H
  4. AMD's New Athlon/Semprons Give Old Phenom CPUs A Big Run For The Money
Latest Linux Articles
  1. Red Hat Enterprise Linux 7.0 RC Benchmarks
  2. AMD Catalyst 14.4 Brings Few Linux Performance Improvements
  3. The Performance Of Fedora 20 Updated
  4. Clang Fights GCC On AMD's Athlon AM1 APU With Jaguar Cores
Latest Linux News
  1. More Steam Linux Tests/Benchmarks Might Be Coming
  2. NVIDIA's Amazing Single-Board ARM Computer Might Be Delayed
  3. Fedora 21 To Get A Playground, New Features
  4. PC-BSD Is Developing Its Own Desktop Environment
  5. Valve Is Bringing VOGL To Windows & Working On Regression Tests
  6. Canonical Is Taking Over Linux 3.13 Kernel Maintenance
  7. Google Web Designer Is Now Natively Available On Linux
  8. Ubuntu 14.10 Is Codenamed The Utopic Unicorn
  9. Audacious 3.5 Lightweight Audio Player Released
  10. Steam Updated For Ubuntu 14.04 LTS, SteamOS
  11. DNF 0.5 Yum Replacement Now Supports Groups
  12. Red Hat Enterprise Linux 7.0 Is Looking Fantastic
Latest Forum Discussions
  1. HTPC-upgrade advice: AMD Richland A8-7600 or Kaveri A10-6700T ???
  2. The GNOME Foundation Is Running Short On Money
  3. What Else Would You Like To See On Phoronix This Spring?
  4. Linux Kernel Developers Fed Up With Ridiculous Bugs In Systemd
  5. The Most Amazing OpenGL Tech Demo In 64kb
  6. Announcing radeontop, a tool for viewing the GPU usage
  7. New card. Open source drivers only.
  8. Script for Fan Speed Control