feat: add hardware nixos module

hosts/andromedae/default.nix

@@ -13,6 +13,8 @@ in
   ];
 
   ataraxia.defaults.role = "desktop";
+  ataraxia.defaults.hardware.cpuVendor = "amd";
+  ataraxia.defaults.hardware.gpuVendor = "amd";
   # Impermanence
   ataraxia.filesystems.zfs.enable = true;
   ataraxia.filesystems.zfs.eraseOnBoot.enable = true;

modules/nixos/hardware/hardware.nix

@@ -0,0 +1,88 @@
+{
+  config,
+  lib,
+  pkgs,
+  ...
+}:
+let
+  inherit (lib) mkEnableOption mkIf mkOption;
+  inherit (lib.types) enum nullOr;
+
+  cfg = config.ataraxia.defaults.hardware;
+in
+{
+  options.ataraxia.defaults.hardware = {
+    enable = mkEnableOption "Default hardware settings";
+    graphics = mkEnableOption "Enable hardware.graphics module";
+    cpuVendor = mkOption {
+      default = null;
+      type = nullOr (enum [
+        "amd"
+        "intel"
+      ]);
+    };
+    gpuVendor = mkOption {
+      default = null;
+      type = nullOr (enum [
+        "amd"
+        "intel"
+        "nvidia"
+      ]);
+    };
+  };
+
+  config = mkIf cfg.enable (
+    lib.mkMerge [
+      {
+        hardware.cpu.${cfg.cpuVendor}.updateMicrocode = true;
+        hardware.enableRedistributableFirmware = true;
+      }
+      (lib.mkIf (cfg.graphics) {
+        boot.initrd.kernelModules =
+          if (cfg.gpuVendor == "amd") then
+            [
+              "amdgpu"
+            ]
+          else if (cfg.gpuVendor == "intel") then
+            [
+              "i915"
+            ]
+          else
+            [ ];
+
+        hardware.graphics = {
+          enable = true;
+          enable32Bit = true;
+          extraPackages =
+            if cfg.gpuVendor == "intel" then
+              [
+                pkgs.intel-media-driver
+                pkgs.intel-vaapi-driver
+                pkgs.libvdpau-va-gl
+              ]
+            else
+              [ ];
+        };
+
+        hardware.amdgpu = lib.mkIf (cfg.gpuVendor == "amd") {
+          opencl.enable = false;
+          initrd.enable = config.boot.initrd.systemd.enable;
+        };
+
+        environment.sessionVariables =
+          if (cfg.gpuVendor == "intel") then
+            {
+              GST_VAAPI_ALL_DRIVERS = "1";
+              LIBVA_DRIVER_NAME = "iHD";
+              VDPAU_DRIVER = "va_gl";
+            }
+          else if (cfg.gpuVendor == "amd") then
+            {
+              AMD_VULKAN_ICD = "RADV";
+            }
+          else
+            { };
+      })
+    ]
+  );
+}

modules/nixos/roles/default.nix

@@ -33,6 +33,7 @@ in
   config =
     let
       baseRole = {
+        ataraxia.defaults.hardware.enable = mkDefault true;
         ataraxia.defaults.locale.enable = mkDefault true;
         ataraxia.defaults.lix.enable = mkDefault true;
         ataraxia.defaults.nix.enable = mkDefault true;
@@ -65,6 +66,7 @@ in
         time.timeZone = "Etc/UTC";
       };
       desktopRole = recursiveUpdate baseRole {
+        ataraxia.defaults.hardware.graphics = mkDefault true;
         ataraxia.defaults.sound.enable = mkDefault true;
 
         location = {