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

AMD Releases New Radeon Code: A-Sync DMA Engines

AMD

Published on 11 December 2012 01:37 AM EST
Written by Michael Larabel in AMD
12 Comments

A second update to the Radeon DRM driver has been released that will be pulled into the Linux 3.8 kernel. This second Direct Render Manager update for the Radeon kernel driver provides new code from AMD that was kept internally for months but is now permitted for open-sourcing.

In last week's first Radeon 3.8 driver update there weren't too many interesting changes with it mostly just being minor updates. However, in that earlier mailing list post, AMD's Alex Deucher wrote that new code would be opened up soon with "new bits waiting internally for release."

That code has now been cleared for release. Unfortunately, it's not early Radeon HD 8000 series open-source support, UVD video decoding support, or anything too groundbreaking, but it's still a worthwhile addition to their open-source driver.

The new code that's been cleared for public consumption is support for a-synchronous DMA engines on Radeon GPUs from the Radeon HD 2000 series (R600) up through the Radeon HD 7000 series (Southern Islands). This code has been running internally at AMD for months but was only cleared today.
I've added a new set of patches that adds support for the asynchronous DMA engines on r6xx-SI. These engines are used for ttm bo moves and VM page table updates currently. They could also be exposed via the CS ioctl for userspace use, but I haven't had a chance to add proper CS checker patches for them yet. These patches have been tested extensively internally for months, so they should be pretty solid.
The Radeon DRM changes for Linux 3.8 in this second pull add nearly 2,000 lines of new kernel code. The DRM pull request can be found on the dri-devel list.

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. NVIDIA GeForce GTX 980: The Best GPU For Linux Gamers
  2. ROCCAT LUA: A Linux-Friendly Gaming Mouse
  3. Cheetah Mounts: The Affordable Way To Put Your TV On The Wall
  4. Scythe Mugen MAX
Latest Linux Articles
  1. Preview: Radeon Gallium3D Performance For CS:GO On Linux
  2. XWayland Linux Gaming Performance With GNOME Wayland On Fedora 21
  3. EXT4/Btrfs/XFS/F2FS Benchmarks On Linux 3.17
  4. Fedora 21 Alpha First Impressions: It's Great
Latest Linux News
  1. Borderlands 2 Launches On Steam For Linux
  2. Debian Jessie Might Get Rid Of The kFreeBSD Port
  3. Fedora Might Try A New Scheduling Strategy For Its Releases
  4. AMD's Catalyst Working On A GLSL Shader Cache
  5. OpenMP 4.0 Offloading Is Closer For GCC 5
  6. Wayland Presentation Extension Added To Weston
  7. Intel Skylake Support Rolls Out To Mesa's DRM
  8. VA-API's Libva 1.4.0 Brings VP8 Encoding Support
  9. Operating System U Fails To Live Up To Its Goals
  10. AMD Catalyst 14.9 Officially Released For Linux
Latest Forum Discussions
  1. NVIDIA Alerts Nouveau: They're Starting To Sign/Validate GPU Firmware Images
  2. FSF Issues Statement On Shellshock Bash Vulnerability
  3. New AMD Catalyst drivers out today
  4. Updated and Optimized Ubuntu Free Graphics Drivers
  5. Take the Steam Survey results with a grain of salt. It is flawed.
  6. AMD Wants To Know What's Wrong With Catalyst
  7. New Group Calls For Boycotting Systemd
  8. Counter-Strike: Global Offensive NVIDIA/AMD Benchmarks On Linux