GL_AMD_pinned_memory Lands In Mesa
Written by Michael Larabel in AMD on 17 February 2015 at 02:00 PM EST. 9 Comments
AMD --
Support for the GL_AMD_pinned_memory OpenGL extension has landed within Mesa and is implemented for the R600g and RadeonSI Gallium3D drivers. This patch series also lands the Userptr support for the open-source AMD graphics drivers on the user-space side.

Earlier this month I wrote about GL_AMD_pinned_memory Comes To The Open-Source Radeon Driver with patches written by AMD's Marek Olšák. As of today in Mesa Git master all of that work is in place to expose the AMD_pinned_memory extension, user pointer support, etc.

From the OpenGL.org registry, "This extension defines an interface that allows improved control of the physical memory used by the graphics device. It allows an existing page of system memory allocated by the application to be used as memory directly accessible to the graphics processor. One example application of this functionality would be to be able to avoid an explicit synchronous copy with sub-system of the application; for instance it is possible to directly draw from a system memory copy of a video image."

This feature will be part of the Mesa 10.6 release in about three months.
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