# Do not modify this file!  It was generated by ‘nixos-generate-config’
# and may be overwritten by future invocations.  Please make changes
# to /etc/nixos/configuration.nix instead.
{ config, lib, pkgs, modulesPath, ... }:

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

  # 1) Make sure modules are available early so the probe can succeed
  boot.initrd.kernelModules = [ "vfio" "vfio_pci" "vfio_iommu_type1" "ahci" ];

  # 2) Also load them again in the running system
  boot.kernelModules = [ "vfio" "vfio_pci" "vfio_iommu_typoe1" "ahci" ];

  # 3) Kernel params to turn on IOMMU and bind your card to vfio-pci
  boot.kernelParams = lib.mkForce [
    # for AMD hosts (use the intel line if you’re on Intel)
    "amd_iommu=on"
    "iommu=pt"

    # helps isolate PCIe ports if your card shares groups
    "pci_acs_override=downstream,multifunction"
  ];

  boot.initrd.availableKernelModules = [ "xhci_pci" "ahci" "nvme" "usb_storage" "usbhid" "sd_mod" ];

  # Bind per-device via udev using driver_override and drivers_probe
  services.udev.extraRules = ''
    # Bind 0000:09:00.0 to vfio-pci
    ACTION=="add", SUBSYSTEM=="pci", KERNEL=="0000:09:00.0", \
      ATTR{driver_override}="vfio-pci", \
      RUN+="/bin/sh -c 'modprobe vfio-pci; echo 0000:09:00.0 > /sys/bus/pci/drivers_probe'"

    # Bind 0000:08:00.0 to ahci (host)
    ACTION=="add", SUBSYSTEM=="pci", KERNEL=="0000:08:00.0", \
      ATTR{driver_override}="ahci", \
      RUN+="/bin/sh -c 'modprobe ahci; echo 0000:08:00.0 > /sys/bus/pci/drivers_probe'"
  '';

  boot.kernel.sysctl."net.ipv4.conf.all.forwarding" = true;

  swapDevices =
    [ { device = "/dev/disk/by-uuid/7e34cdc3-bd48-435a-8ea2-e1fe43926262"; }
    ];

  # Enables DHCP on each ethernet and wireless interface. In case of scripted networking
  # (the default) this is the recommended approach. When using systemd-networkd it's
  # still possible to use this option, but it's recommended to use it in conjunction
  # with explicit per-interface declarations with `networking.interfaces.<interface>.useDHCP`.
  networking.useDHCP = lib.mkDefault true;
  # networking.interfaces.enp3s0.useDHCP = lib.mkDefault true;

  nixpkgs.hostPlatform = lib.mkDefault "x86_64-linux";
  hardware.cpu.amd.updateMicrocode = lib.mkDefault config.hardware.enableRedistributableFirmware;

  services.xserver.videoDrivers = [ "nvidia" ];
  hardware.nvidia = {
    package = config.boot.kernelPackages.nvidiaPackages.legacy_470;
    modesetting.enable = true;
    powerManagement.enable = true;
    open = false; # <--- this must be false for proprietary
    nvidiaSettings = true;
  };
  nixpkgs.config.allowUnfree = true;
  nixpkgs.config.nvidia.acceptLicense = true;
}