NVidia has begun publishing documentation for open driver development.

Nvidia has begun publishing free documentation on the interfaces of its graphics chips. This will improve the open nouveau driver.
The published information includes information about the Maxwell, Pascal, Volta and Kepler families; there is currently no information about Turing chips. The information includes data about the BIOS, initialization and device management, power consumption modes, frequency control, etc.
All published information is available on GitHub.

Source: linux.org.ru