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Linaro Decides On Memory Management APIs

Ubuntu

Published on 12 May 2011 02:54 AM EDT
Written by Michael Larabel in Ubuntu
1 Comment

For the past three days at UDS Budapest there's been a mini summit to work on deciding about what to do for video memory management on SoC/embedded devices. The open-source graphics drivers for desktops/notebooks are fine with GEM/TTM, but they don't work so well for System-on-Chip designs. The hope from this mini-summit was to lay the groundwork to solve this issue and they hope they have come up with an attack plan.

Back in April there were hopes by the Linaro developers to unify the Linux video memory management APIs so that there could be more to share between embedded and desktop/mobile graphics, etc. There were some concerns over these plans as it possibly just being a fork of GEM or the like.

After three afternoons of debating, the outcome is that the new Linaro video memory management solution will involve extending the DMA and IOMMU APIs. Once the DMA and IOMMU APIs have been extended to their liking, an effort will be made to move to a single sub-system (more than likely using GEM buffers) and the ability to pass these buffers between sub-systems. GEM and CMA will need to be slightly re-worked as a result.

The official notes for the UDS Budapest Linaro graphics memory management mini-summit can be found for day 3, day 2, and day 1.

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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