 For example, in July 2014 AMD published a set of 83 patches to be merged into Linux kernel mainline 3.17 for supporting their Graphics Core Next-based Radeon graphics cards.The special driver titled "HSA kernel driver" resides in the directory /drivers/gpu/hsa while the DRM-graphics device drivers reside in /drivers/gpu/drm and augments the already existent DRM driver for Radeon cards.This very first implementation focuses on a single and works alongside the existing Radeon kernel graphics driver (kgd).