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Nouveau Lands Maxwell GPU Support In Mesa Gallium3D

Mesa

Published on 15 May 2014 12:00 AM EDT
Written by Michael Larabel in Mesa
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The open-source, reverse-engineered Nouveau driver has landed initial support for NVIDIA Maxwell graphics processors within its Mesa Gallium3D Linux graphics driver.

Landing within the Linux 3.15 kernel is initial NVIDIA Maxwell support from the kernel-side with Nouveau's Direct Rendering Manager. That support is still a first-stab at the support for this hardware that first began appearing in February in the form of the GeForce GTX 750 series. That Nouveau DRM code update for Maxwell is enough to light up the Maxwell GPUs with kernel-based mode-setting, but acceleration support is currently dependent upon the binary driver's microcode/firmware for proper hardware initialization.

On the user-space Gallium3D driver side, the work has been more of a challenge since Maxwell is a completely new instruction set architecture (ISA) compared to the Kepler GeForce GTX 600/700 series. After much work though, Ben Skeggs of Red Hat was able to push the initial code for Nouveau Maxwell into mainline Mesa.

Nouveau Lands Maxwell GPU Support In Mesa Gallium3D


The work that was pushed on Wednesday includes adding a new SM50 shader compiler back-end, enabling support for Maxwell boards, and other changes. The NVIDIA Maxwell support is built atop the Nouveau "NVC0" Gallium3D driver that supports the Fermi (GeForce 400/500) and Kepler (GeForce 600/700) series GPUs and now Kepler (GeForce GTX 750 and other upcoming products).

Soon as I get a chance to play with Linux 3.15 paired with this new Mesa 10.3-devel code and using the external firmware, I'll see how the support is working out. Sadly, like other NVIDIA GPUs on Nouveau, the biggest limitation will likely come down to its lack of re-clocking support for driving the hardware at maximum performance -- see Wednesday's Intel vs. Radeon vs. Nouveau On Linux 3.15 + Mesa 10.3-devel article for more details.

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 .
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