One of the Google Summer of Code projects pertaining to Mesa / X.Org is to bring-up open-source OpenCL support with the Gallium3D driver architecture. There's long been a branch of Mesa dubbed "Clover" that provides an OpenCL state tracker for the Gallium3D driver architecture, but it hasn't been usable as there's a lot of work to be finished. This GSoC project attempts to change that and there's already been a big milestone achieved...
June 20, 2011
Gallium3D Clover Can Now Execute OpenCL Native Kernels
Read more at Phoronix