A lot of it is software, but not necessarily in the driver. Nouveau folks pretty much gave up and use NVidia's firmware blob going forward. While that's mostly

A lot of it is software, but not necessarily in the driver. Nouveau folks pretty much gave up and use NVidia's firmware blob going forward. While that's mostly due to NVidia not cooperating in making crucial capabilities of the GPU available to non-signed firmware blobs, the upside is that it will hopefully significantly reduce the effort connected with wiring up new hardware components on the GPU.