| amdgpu replaced both the in-kernel open-source "radeon" driver, which was already open source, and the proprietary "fglrx" driver. But the user-space portions are probably more significant for performance than the kernel drivers. Here we have: - r300 and r600 (open source OpenGL backend for older hardware, sits on top of the radeon kernel driver, not much development happening) - radeonsi (open source OpenGL backend for newer hardware, sits on top of either the radeon or amdgpu kernel drivers depending on hardware version and kernel configuration) - fglrx (closed source OpenGL driver on top of the fglrx kernel driver, both obsolete now) - radv (open source Vulkan driver on top of amdgpu) - amgpu-pro (closed source Vulkan driver on top of amdgpu) - not sure if there is also still a proprietary OpenGL driver but if there is no one should care since radeonsi works well enough - amdvlk (open source dumps of amdgpu-pro without proprietary shader compiler on top of amdgpu) Then you have different shader compilers which also significantly affect both shader compile time and runtime performance: - internal compiler used by r600 - LLVM (used by radeonsi and amdvlk) - ACO (used by radv and possibly radeonsi these days) - AMD's proprietary compiler (used by fglrx and amdgpu-pro) And for X.org you also have different display drivers (fglrx, radeon, modesetting). |