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. Scythe Mugen MAX
  2. Intel Core i7 5960X Haswell-E On Linux
  3. Intel 80GB 530 Series M.2 SSD On Linux
  4. With A New Motherboard, The Core i7 5960X Haswell-E Lights Up
Latest Linux Articles
  1. MSAA RadeonSI Gallium3D Performance Preview
  2. Intel Core i7 5960X CPU Core Scaling Under Linux
  3. AMD RadeonSI Gallium3D Performance For 4K Linux Gaming
  4. 9-Way File-System Comparison With A SSD On The Linux 3.17 Kernel
Latest Linux News
  1. Nouveau For Linux 3.18 Gains DP Audio, More Re-Clocking
  2. SUSE Gets Bought Out Again
  3. Enlightenment E19 Officially Released With Its Own Wayland Compositor
  4. OpenMediaVault 1.0 Released As New Linux NAS Alternative
  5. VESA Releases DisplayPort 1.3, Pushes 32.4 Gbits/sec
  6. Opera 25 Beta Has Bookmarks & Linux Support
  7. LLVM Clang Now Builds Even More Debian Packages
  8. Pyston 0.2 Is A Heck Of A Lot Better At Running Python Programs
  9. Linux 3.17-rc5 Kernel Released
  10. FreeBSD 10.1 In Beta Ahead Of Planned Release Next Month
Latest Forum Discussions
  1. New Group Calls For Boycotting Systemd
  2. support for first generation UVD blocks (RV6xx, RS780, RS880 and RV790)
  3. Nvidia joins the ranks of Apple and Microsoft
  4. Hd 6850
  5. nv and xorg.conf under Debian PPC
  6. X.Org Is Looking For Some Female Help
  7. FSF Issues Their Rebuttal To Apple's New iPhone, Watch & Apple Pay
  8. Updated and Optimized Ubuntu Free Graphics Drivers