From 72881024d06611b10fb825d8f693e33b97760342 Mon Sep 17 00:00:00 2001
From: xeals <dev@xeal.me>
Date: Sat, 17 Oct 2020 11:59:01 +1100
Subject: [PATCH] services: port amdgpu services from private config

---
 modules/default.nix                           |  7 +-
 modules/services/hardware/amdgpu-common.nix   | 17 +++++
 modules/services/hardware/amdgpu-fan.nix      | 71 +++++++++++++++++++
 modules/services/hardware/amdgpu-pwm.nix      | 29 ++++++++
 .../hardware/radeon-profile-daemon.nix        | 29 ++++++++
 5 files changed, 150 insertions(+), 3 deletions(-)
 create mode 100644 modules/services/hardware/amdgpu-common.nix
 create mode 100644 modules/services/hardware/amdgpu-fan.nix
 create mode 100644 modules/services/hardware/amdgpu-pwm.nix
 create mode 100644 modules/services/hardware/radeon-profile-daemon.nix

diff --git a/modules/default.nix b/modules/default.nix
index 84ccb1a..5263bd7 100644
--- a/modules/default.nix
+++ b/modules/default.nix
@@ -1,6 +1,7 @@
 {
-  # Add your NixOS modules here
-  #
-  # my-module = ./my-module;
+  amdgpu-common = ./services/hardware/amdgpu-common.nix;
+  amdgpu-fan = ./services/hardware/amdgpu-fan.nix;
+  amdgpu-pwm = ./services/hardware/amdgpu-pwm.nix;
+  radeon-profile-daemon = ./services/hardware/radeon-profile-daemon.nix;
 }
 
diff --git a/modules/services/hardware/amdgpu-common.nix b/modules/services/hardware/amdgpu-common.nix
new file mode 100644
index 0000000..572d70a
--- /dev/null
+++ b/modules/services/hardware/amdgpu-common.nix
@@ -0,0 +1,17 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+{
+  options.services.amdgpu = {
+    cards = mkOption {
+      type = types.listOf types.str;
+      default = [ "card0" ];
+      example = literalExample ''[ "card0" ]'';
+      description = ''
+        A list of cards to enable fan configuration for. The identifiers for
+        each device can be found in /sys/class/drm/ as card0, card1, etc.
+      '';
+    };
+  };
+}
diff --git a/modules/services/hardware/amdgpu-fan.nix b/modules/services/hardware/amdgpu-fan.nix
new file mode 100644
index 0000000..3e810de
--- /dev/null
+++ b/modules/services/hardware/amdgpu-fan.nix
@@ -0,0 +1,71 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let
+
+  acfg = config.services.amdgpu;
+  cfg = config.services.amdgpu.fan;
+
+in
+
+{
+  options.services.amdgpu.fan = {
+    enable = mkEnableOption "amdgpu-fan";
+
+    speedMatrix = mkOption {
+      type = with types; listOf (listOf int);
+      # Translated from upstream default config. Since it tries to write the
+      # config if it's not found, we want some kind of default.
+      default = [
+        [ 0 0 ]
+        [ 30 33 ]
+        [ 45 50 ]
+        [ 60 66 ]
+        [ 65 69 ]
+        [ 70 75 ]
+        [ 75 89 ]
+        [ 80 100 ]
+      ];
+      example = literalExample ''
+        [
+          [ 0 0 ]
+          [ 40 30 ]
+          [ 60 50 ]
+          [ 80 100 ]
+        ]
+      '';
+      description = ''
+        A list of temperature-fan speed pairs. The temperature is specified in
+        degrees celcius, and speed is specified in %.
+      '';
+    };
+  };
+
+  config = mkIf cfg.enable {
+    assertions = singleton {
+      assertion = all (speeds: length speeds == 2) cfg.speedMatrix;
+      message = "services.amdgpu-fan.speedMatrix must be a list of paired lists";
+    };
+
+    environment.etc."amdgpu-fan.yml".text = builtins.toJSON {
+      speed_matrix = cfg.speedMatrix;
+      cards = acfg.cards;
+    };
+
+    powerManagement.resumeCommands = "${pkgs.systemd}/bin/systemctl try-restart amdgpu-fan";
+
+    # Translated from the upstream service file.
+    systemd.services = {
+      amdgpu-fan = {
+        description = "amdgpu fan controller";
+        wantedBy = [ "default.target" ];
+        after = [ "enable-manual-amdgpu-fan.service" ];
+        serviceConfig = {
+          ExecStart = "${pkgs.amdgpu-fan}/bin/amdgpu-fan";
+          Restart = "always";
+        };
+      };
+    };
+  };
+}
diff --git a/modules/services/hardware/amdgpu-pwm.nix b/modules/services/hardware/amdgpu-pwm.nix
new file mode 100644
index 0000000..5849f5b
--- /dev/null
+++ b/modules/services/hardware/amdgpu-pwm.nix
@@ -0,0 +1,29 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let
+
+  acfg = config.services.amdgpu;
+  cfg = config.services.amdgpu.pwm;
+
+in
+
+{
+  options.services.amdgpu.pwm = {
+    enable = mkEnableOption "amdgpu-pwm";
+  };
+
+  config = mkIf cfg.enable {
+    systemd.services.amdgpu-pwm = {
+      description = "enable manual configuration of AMDGPU fans";
+      wantedBy = [ "default.target" ];
+      script =
+        let
+          enablePwm = card: "echo 1 > /sys/class/drm/${card}/device/hwmon/hwmon1/pwm1_enable";
+        in
+        lib.concatStringsSep "\n" (map enablePwm acfg.cards);
+      serviceConfig.Type = "oneshot";
+    };
+  };
+}
diff --git a/modules/services/hardware/radeon-profile-daemon.nix b/modules/services/hardware/radeon-profile-daemon.nix
new file mode 100644
index 0000000..4d4b90b
--- /dev/null
+++ b/modules/services/hardware/radeon-profile-daemon.nix
@@ -0,0 +1,29 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let
+
+  cfg = config.services.radeon-profile-daemon;
+
+in
+
+{
+  options.services.radeon-profile-daemon = {
+    enable = mkEnableOption "radeon-profile-daemon";
+  };
+
+  config = mkIf cfg.enable {
+    systemd.services = {
+      radeon-profile-daemon = {
+        description = "radeon-profile daemon";
+        wantedBy = [ "multi-user.target" ];
+        after = [ "enable-manual-amdgpu-fan.service" ];
+        serviceConfig = {
+          Type = "simple";
+          ExecStart = "${pkgs.radeon-profile-daemon}/bin/radeon-profile-daemon";
+        };
+      };
+    };
+  };
+}