99 lines
3 KiB
Nix
99 lines
3 KiB
Nix
{ config, lib, pkgs, ... }:
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let
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cfg = config.services.rshim;
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rshimCommand = [ "${cfg.package}/bin/rshim" ]
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++ lib.optionals (cfg.backend != null) [ "--backend ${cfg.backend}" ]
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++ lib.optionals (cfg.device != null) [ "--device ${cfg.device}" ]
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++ lib.optionals (cfg.index != null) [ "--index ${builtins.toString cfg.index}" ]
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++ [ "--log-level ${builtins.toString cfg.log-level}" ]
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;
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in
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{
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options.services.rshim = {
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enable = lib.mkEnableOption (lib.mdDoc "user-space rshim driver for the BlueField SoC");
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package = lib.mkPackageOptionMD pkgs "rshim-user-space" { };
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backend = lib.mkOption {
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type = with lib.types; nullOr (enum [ "usb" "pcie" "pcie_lf" ]);
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description = lib.mdDoc ''
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Specify the backend to attach. If not specified, the driver will scan
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all rshim backends unless the `device` option is given with a device
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name specified.
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'';
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default = null;
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example = "pcie";
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};
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device = lib.mkOption {
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type = with lib.types; nullOr str;
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description = lib.mdDoc ''
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Specify the device name to attach. The backend driver can be deduced
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from the device name, thus the `backend` option is not needed.
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'';
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default = null;
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example = "pcie-04:00.2";
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};
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index = lib.mkOption {
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type = with lib.types; nullOr int;
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description = lib.mdDoc ''
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Specify the index to create device path `/dev/rshim<index>`. It's also
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used to create network interface name `tmfifo_net<index>`. This option
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is needed when multiple rshim instances are running.
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'';
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default = null;
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example = 1;
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};
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log-level = lib.mkOption {
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type = lib.types.int;
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description = lib.mdDoc ''
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Specify the log level (0:none, 1:error, 2:warning, 3:notice, 4:debug).
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'';
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default = 2;
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example = 4;
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};
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config = lib.mkOption {
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type = with lib.types; attrsOf (oneOf [ int str ]);
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description = lib.mdDoc ''
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Structural setting for the rshim configuration file
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(`/etc/rshim.conf`). It can be used to specify the static mapping
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between rshim devices and rshim names. It can also be used to ignore
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some rshim devices.
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'';
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default = { };
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example = {
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DISPLAY_LEVEL = 0;
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rshim0 = "usb-2-1.7";
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none = "usb-1-1.4";
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};
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};
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};
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config = lib.mkIf cfg.enable {
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environment.etc = lib.mkIf (cfg.config != { }) {
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"rshim.conf".text = lib.generators.toKeyValue
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{ mkKeyValue = lib.generators.mkKeyValueDefault { } " "; }
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cfg.config;
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};
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systemd.services.rshim = {
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after = [ "network.target" ];
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serviceConfig = {
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Restart = "always";
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Type = "forking";
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ExecStart = [
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(lib.concatStringsSep " \\\n" rshimCommand)
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];
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KillMode = "control-group";
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};
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wantedBy = [ "multi-user.target" ];
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};
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};
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meta.maintainers = with lib.maintainers; [ nikstur ];
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}
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