How to use the newly amdgpu.ko rebuild by myself

[ccnankai]

After I rebuild amdgpu.ko, how can I use the latest amdgpu.ko, I tried removing the old amdgpu module, but it keeps being used.

$sudo rmmod amdgpu
rmmod: ERROR: Module amdgpu is in use
$sudo insmod amdgpu.ko
insmod: ERROR: could not insert module amdgpu.ko: File exists

Is there any way to fix this, run the latest modules.

[fxkamd]

I would recommend a reboot. Removing the module on a running system is tricky. You'd need to kill any Xserver or compositor running on your system and disconnect the framebuffer console from the amdgpu driver.

[ccnankai]

@fxkamd Got it .Thank very much. I am a beginner, I am learning gpu driver development by myself. Is there is a lot of ambiguous information when reading the driver, such as vimd, pasid, map_queues_cpsch and so on. Is there any documentation available?

[fxkamd]

What you're asking for is not end-user documentation. More like architectural or developer on-boarding documentation. Unfortunately there isn't much public information of that kind, other than comments in the source code itself. If you are interested in contributing to the driver, a good place to start would be the mailing list [email protected], which is where all the upstream code changes are reviewed and discussed.

You may also find some basic info generated from the source code here: https://docs.kernel.org/gpu/amdgpu/index.html

A public clone of our internal upstream development branch (amd-staging-drm-next) can be found on gitlab: https://gitlab.freedesktop.org/agd5f/linux