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Handling Command Submission For The Intel DRM Driver

Intel

Published on 01 November 2012 10:50 AM EDT
Written by Michael Larabel in Intel
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If you liked yesterday's post by Daniel Vetter of Intel's Open-Source Technology Center that covered going over the Graphics Execution Manager for memory management, today he's around with a second part that details command submission handling for the Intel open-source Linux driver.

For those interested in low-level details of GPU driver development whether it be for curiosity or wanting to get into driver development, part two covers the Intel command submission process.
As I've alluded already, gpu command submission on intel hardware happens by sending a special buffer object with rendering commands to the kernel for execution on the gpu, the so called batch buffer. The ioctl to do this is called execbuf. Now this buffer contains tons of references to various other buffer objects which contain textures, render buffers, depth&stencil buffers, vertices, all kinds of gpu specific things like shaders and also quite some state buffers which e.g. describe the configuration of specific (fixed-function) gpu units.
Continue reading on Daniel's blog.

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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