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