646b892680
Some checks failed
Periodic Merges (6h) / master → staging-nixos (push) Failing after 12m50s
Periodic Merges (6h) / master → staging-next (push) Failing after 12m54s
Periodic Merges (24h) / merge-base(master,staging) → haskell-updates (push) Failing after 11m54s
Periodic Merges (6h) / staging-next → staging (push) Failing after 12m13s
Periodic Merges (24h) / staging-next-25.05 → staging-25.05 (push) Failing after 13m24s
Periodic Merges (24h) / release-25.05 → staging-next-25.05 (push) Failing after 14m28s
54 lines
1.0 KiB
Nix
54 lines
1.0 KiB
Nix
{ config, lib, ... }:
|
|
|
|
with lib;
|
|
|
|
let
|
|
|
|
cfg = config.powerManagement.scsiLinkPolicy;
|
|
|
|
kernel = config.boot.kernelPackages.kernel;
|
|
|
|
allowedValues = [
|
|
"min_power"
|
|
"max_performance"
|
|
"medium_power"
|
|
"med_power_with_dipm"
|
|
];
|
|
|
|
in
|
|
|
|
{
|
|
###### interface
|
|
|
|
options = {
|
|
|
|
powerManagement.scsiLinkPolicy = mkOption {
|
|
default = null;
|
|
type = types.nullOr (types.enum allowedValues);
|
|
description = ''
|
|
SCSI link power management policy. The kernel default is
|
|
"max_performance".
|
|
|
|
"med_power_with_dipm" is supported by kernel versions
|
|
4.15 and newer.
|
|
'';
|
|
};
|
|
|
|
};
|
|
|
|
###### implementation
|
|
|
|
config = mkIf (cfg != null) {
|
|
|
|
assertions = singleton {
|
|
assertion = (cfg == "med_power_with_dipm") -> versionAtLeast kernel.version "4.15";
|
|
message = "med_power_with_dipm is not supported for kernels older than 4.15";
|
|
};
|
|
|
|
services.udev.extraRules = ''
|
|
SUBSYSTEM=="scsi_host", ACTION=="add", KERNEL=="host*", ATTR{link_power_management_policy}="${cfg}"
|
|
'';
|
|
};
|
|
|
|
}
|