ravenna-alsa-lkm-bondagit: init at unstable-2023-07-16

[mrobbetts]

Description of changes

Init the (customized) Merging Technologies Ravenna ALSA kernel module from https://github.com/bondagit/ravenna-alsa-lkm/

This module provides AES67 capability, (alongside a user-space control process, such as the aes67-daemon project, for which a NixOS PR will follow).

I have this running on my x86-64 linux system, enabled via:

boot.extraModulePackages = [ config.boot.kernelPackages.ravenna-alsa-lkm-bondagit ];

and auto-loaded with:

boot.kernelModules = [ ... "MergingRavennaALSA" ];

One question I have is, the upstream documentation notes that this module requires a kernel with:

NETFILTER
HIGH_RES_TIMERS
NETLINK

options enabled, but I couldn't figure out a way to define such a requirement from inside the driver's module package. One thought is, this driver is only really going to be pulled in as a dependency of the aes67-daemon package, for which I have a NixOS module, and these requirements can be encoded there. Is this the standard approach?

Things done

• Built on platform(s)
  • x86_64-linux
  • aarch64-linux
  • x86_64-darwin
  • aarch64-darwin
• For non-Linux: Is sandbox = true set in nix.conf? (See Nix manual)
• Tested, as applicable:
  • NixOS test(s) (look inside nixos/tests)
  • and/or package tests
  • or, for functions and "core" functionality, tests in lib/tests or pkgs/test
  • made sure NixOS tests are linked to the relevant packages
• Tested compilation of all packages that depend on this change using nix-shell -p nixpkgs-review --run "nixpkgs-review rev HEAD". Note: all changes have to be committed, also see nixpkgs-review usage
• Tested basic functionality of all binary files (usually in ./result/bin/)
• 23.11 Release Notes (or backporting 23.05 Release notes)
  • (Package updates) Added a release notes entry if the change is major or breaking
  • (Module updates) Added a release notes entry if the change is significant
  • (Module addition) Added a release notes entry if adding a new NixOS module
• Fits CONTRIBUTING.md.

[mrobbetts]

(gentle bump)

[FliegendeWurst]

Please format with the new formatter.

[FliegendeWurst]

Suggested change

	description = "Merging Technologies' ALSA driver implementation of Ravenna and AES67, with additional work by bondagit";
	description = "Technologies' ALSA driver implementation of Ravenna and AES67";

[FliegendeWurst]

GPLv3 is odd for a kernel module. Are you sure it is correct?