1 files changed, 71 insertions, 0 deletions
diff --git a/nixos/modules/services/misc/tuxclocker.nix b/nixos/modules/services/misc/tuxclocker.nix
new file mode 100644
index 0000000000000..5969f75b8e30d
--- /dev/null
+++ b/nixos/modules/services/misc/tuxclocker.nix
@@ -0,0 +1,71 @@
+{ config, pkgs, lib, ... }:
+
+with lib;
+
+let
+  cfg = config.programs.tuxclocker;
+in
+{
+  options.programs.tuxclocker = {
+    enable = mkEnableOption (lib.mdDoc ''
+      TuxClocker, a hardware control and monitoring program
+    '');
+
+    enableAMD = mkEnableOption (lib.mdDoc ''
+      AMD GPU controls.
+      Sets the `amdgpu.ppfeaturemask` kernel parameter to 0xfffd7fff to enable all TuxClocker controls
+    '');
+
+    enabledNVIDIADevices = mkOption {
+      type = types.listOf types.int;
+      default = [ ];
+      example = [ 0 1 ];
+      description = lib.mdDoc ''
+        Enable NVIDIA GPU controls for a device by index.
+        Sets the `Coolbits` Xorg option to enable all TuxClocker controls.
+      '';
+    };
+
+    useUnfree = mkOption {
+      type = types.bool;
+      default = false;
+      example = true;
+      description = lib.mdDoc ''
+        Whether to use components requiring unfree dependencies.
+        Disabling this allows you to get everything from the binary cache.
+      '';
+    };
+  };
+
+  config = let
+      package = if cfg.useUnfree then pkgs.tuxclocker else pkgs.tuxclocker-without-unfree;
+    in
+      mkIf cfg.enable {
+        environment.systemPackages = [
+          package
+        ];
+
+        services.dbus.packages = [
+          package
+        ];
+
+        # MSR is used for some features
+        boot.kernelModules = [ "msr" ];
+
+        # https://download.nvidia.com/XFree86/Linux-x86_64/430.14/README/xconfigoptions.html#Coolbits
+        services.xserver.config = let
+          configSection = (i: ''
+            Section "Device"
+              Driver "nvidia"
+              Option "Coolbits" "31"
+              Identifier "Device-nvidia[${toString i}]"
+            EndSection
+          '');
+        in
+          concatStrings (map configSection cfg.enabledNVIDIADevices);
+
+        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/drivers/gpu/drm/amd/include/amd_shared.h#n207
+        # Enable everything modifiable in TuxClocker
+        boot.kernelParams = mkIf cfg.enableAMD [ "amdgpu.ppfeaturemask=0xfffd7fff" ];
+      };
+}