nixos-config/machines/hitagi/hardware-configuration.nix

{ config, lib, modulesPath, pkgs, ... }:

{
  imports = [
    (modulesPath + "/installer/scan/not-detected.nix")
  ];

  boot = {
    # fan control configuration from https://gist.github.com/bakman2/e801f342aaa7cade62d7bd54fd3eabd8
    kernelModules = [ "kvm-amd" "it87" ];
    kernelParams = [ "acpi_enforce_resources=lax" ]; # allow it87 to load
    extraModulePackages = with config.boot.kernelPackages; [ it87 ];
    extraModprobeConfig = ''
      options it87 force_id=0x8688
    '';
    loader = {
      grub.enable = false;
      systemd-boot.enable = true;
      efi.canTouchEfiVariables = true;
    };
    initrd = {
      availableKernelModules = [ "aesni_intel" "ahci" "ehci_pci" "nvme" "sd_mod" "sr_mod" "usb_storage" "usbhid" "xhci_pci" ];
      kernelModules = [ "dm-snapshot" ];
      luks.devices = {
        root = {
          name = "root";
          device = "/dev/disk/by-uuid/1607bb2a-329b-4252-b11a-b43eb6b7bf0c";
          preLVM = true;
          allowDiscards = true;
        };
      };
    };
  };

  fileSystems = {
    "/" = {
      device = "/dev/disk/by-uuid/9e6b279e-6995-44da-b673-21b9e23a5278";
      fsType = "btrfs";
      options = [ "discard=async" "noatime" "compress=zstd" ];
    };

    "/boot" = {
      device = "/dev/disk/by-uuid/75DA-DFE2";
      fsType = "vfat";
    };

    "/data" = {
      device = "/dev/mapper/data";
      fsType = "btrfs";
      options = [ "compress=zstd" ];
      encrypted = {
        label = "data";
        enable = true;
        blkDev = "/dev/disk/by-uuid/7f4ba71e-3aca-4294-b37f-49f37b584dbd";
        keyFile = "/mnt-root/root/luks-data";
      };
    };

    "/data/ssd" = {
      device = "/dev/mapper/data-ssd";
      fsType = "btrfs";
      options = [ "discard=async" "noatime" "compress=zstd" ];
      encrypted = {
        # !!! HACK
        label = "data-ssd --allow-discards";
        enable = true;
        blkDev = "/dev/disk/by-uuid/41baa168-7fa0-4eb3-b314-50766ddf126d";
        keyFile = "/mnt-root/root/luks-data";
      };
    };
  };

  swapDevices = [
    { device = "/dev/disk/by-uuid/2774d182-ddc9-4d79-886e-995fcd60a88a"; }
  ];

  # GPU
  hardware.opengl.extraPackages = with pkgs; [
    rocm-opencl-icd
  ];

  environment.systemPackages = with pkgs; [
    clinfo
    radeontop
    rocm-smi
  ];

  # https://www.reddit.com/r/gigabyte/comments/p5ewjn/b550i_pro_ax_f13_bios_sleep_issue_on_linux/
  systemd.services.suspend-fix = {
    wantedBy = [ "multi-user.target" ];
    description = "Fix suspend";

    script = ''
      if grep -q "GPP0	.*	\*enabled" /proc/acpi/wakeup; then
          echo GPP0 > /proc/acpi/wakeup
          echo "Disabled wakeup for GPP0"
      else
          echo "Wakeup for GPP0 already disabled"
      fi
    '';

    serviceConfig = {
      Type = "oneshot";
    };
  };

  sbruder.fancontrol = {
    enable = true;
    enableDefaultMapping = true;
    fans = {
      front = {
        pwmFile = "/sys/class/hwmon/hwmon1/pwm4";
        rpmFile = "/sys/class/hwmon/hwmon1/fan4_input";
        pwmLineStart = 50;
        neverStop = true;
      };
      back = {
        pwmFile = "/sys/class/hwmon/hwmon1/pwm2";
        rpmFile = "/sys/class/hwmon/hwmon1/fan2_input";
      };
    };
    sensors = {
      cpu = {
        file = "/sys/class/hwmon/hwmon2/temp3_input";
        min = 50;
        max = 80;
      };
      gpu = {
        file = "/sys/class/hwmon/hwmon4/temp1_input";
        min = 50;
        max = 70;
      };
      nvme = {
        file = "/sys/class/hwmon/hwmon0/temp1_input";
        min = 40;
        max = 70;
      };
    };
  };
}