AMDGPU
The AMDGPU driver is AMD's open source GPU driver which comes included with the Linux kernel.
An absence of critical technical documentation has historically slowed growth and adoption of developer ecosystems for GPU virtualization.
This CC-BY-4.0 licensed content can either be used with attribution, or used as inspiration for new documentation, created by GPU vendors for public commercial distribution as developer documentation.
Where possible, this documentation will clearly label dates and versions of observed-but-not-guaranteed behaviour vs. vendor-documented stable interfaces/behaviour with guarantees of forward or backward compatibility.
This software's source code can be viewed here.
This OpenMdev page should aim to provide similar insights about APIs exposed to Linux developers to those documented on the OpenRM Driver API page.
This page may provide some of the required information from which details immediately relevant to graphics mediation can be consolidated: