AMDGPU

AMDGPU is AMD's fully open source unified graphics driver for Linux. AMDGPU officially supports cards built upon GCN 1.2 or higher, though support for GCN 1.0/1.1 is incomplete, it can be enabled by a kernel parameter and some Linux distributions enabled it by default.
AMDGPU also has an optional closed-source component, which operates on top of the open source AMDGPU for alternative 3D application support, known as AMDGPU-PRO.