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nVidia: Support dynamic (fine-grained) power management

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Svein Ove Aas 2020-10-14 16:17:53 +01:00 committed by Dmitry Kalinkin
parent 6021ab7820
commit c9f8884592
1 changed files with 40 additions and 1 deletions
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41
nixos/modules/hardware/video/nvidia.nix
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@ -63,6 +63,15 @@ in
'';
};
hardware.nvidia.powerManagement.finegrained = mkOption {
type = types.bool;
default = false;
description = ''
Experimental power management of PRIME offload. For more information, see
the NVIDIA docs, chapter 22. PCI-Express runtime power management.
'';
};
hardware.nvidia.modesetting.enable = mkOption {
type = types.bool;
default = false;
@ -193,6 +202,14 @@ in
assertion = !(syncCfg.enable && offloadCfg.enable);
message = "Only one NVIDIA PRIME solution may be used at a time.";
}
{
assertion = !(syncCfg.enable && cfg.powerManagement.finegrained);
message = "Sync precludes powering down the NVIDIA GPU.";
}
{
assertion = cfg.powerManagement.enable -> offloadCfg.enable;
message = "Fine-grained power management requires offload to be enabled.";
}
];
# If Optimus/PRIME is enabled, we:
@ -228,6 +245,7 @@ in
''
BusID "${pCfg.nvidiaBusId}"
${optionalString syncCfg.allowExternalGpu "Option \"AllowExternalGpus\""}
${optionalString cfg.powerManagement.finegrained "Option \"NVreg_DynamicPowerManagement=0x02\""}
'';
screenSection =
''
@ -315,14 +333,35 @@ in
boot.kernelParams = optional (offloadCfg.enable || cfg.modesetting.enable) "nvidia-drm.modeset=1"
++ optional cfg.powerManagement.enable "nvidia.NVreg_PreserveVideoMemoryAllocations=1";
# Create /dev/nvidia-uvm when the nvidia-uvm module is loaded.
services.udev.extraRules =
''
# Create /dev/nvidia-uvm when the nvidia-uvm module is loaded.
KERNEL=="nvidia", RUN+="${pkgs.runtimeShell} -c 'mknod -m 666 /dev/nvidiactl c $$(grep nvidia-frontend /proc/devices | cut -d \ -f 1) 255'"
KERNEL=="nvidia_modeset", RUN+="${pkgs.runtimeShell} -c 'mknod -m 666 /dev/nvidia-modeset c $$(grep nvidia-frontend /proc/devices | cut -d \ -f 1) 254'"
KERNEL=="card*", SUBSYSTEM=="drm", DRIVERS=="nvidia", RUN+="${pkgs.runtimeShell} -c 'mknod -m 666 /dev/nvidia%n c $$(grep nvidia-frontend /proc/devices | cut -d \ -f 1) %n'"
KERNEL=="nvidia_uvm", RUN+="${pkgs.runtimeShell} -c 'mknod -m 666 /dev/nvidia-uvm c $$(grep nvidia-uvm /proc/devices | cut -d \ -f 1) 0'"
KERNEL=="nvidia_uvm", RUN+="${pkgs.runtimeShell} -c 'mknod -m 666 /dev/nvidia-uvm-tools c $$(grep nvidia-uvm /proc/devices | cut -d \ -f 1) 0'"
'' + optionalString cfg.powerManagement.finegrained ''
# Remove NVIDIA USB xHCI Host Controller devices, if present
ACTION=="add", SUBSYSTEM=="pci", ATTR{vendor}=="0x10de", ATTR{class}=="0x0c0330", ATTR{remove}="1"
# Remove NVIDIA USB Type-C UCSI devices, if present
ACTION=="add", SUBSYSTEM=="pci", ATTR{vendor}=="0x10de", ATTR{class}=="0x0c8000", ATTR{remove}="1"
# Remove NVIDIA Audio devices, if present
ACTION=="add", SUBSYSTEM=="pci", ATTR{vendor}=="0x10de", ATTR{class}=="0x040300", ATTR{remove}="1"
# Enable runtime PM for NVIDIA VGA/3D controller devices on driver bind
ACTION=="bind", SUBSYSTEM=="pci", ATTR{vendor}=="0x10de", ATTR{class}=="0x030000", TEST=="power/control", ATTR{power/control}="auto"
ACTION=="bind", SUBSYSTEM=="pci", ATTR{vendor}=="0x10de", ATTR{class}=="0x030200", TEST=="power/control", ATTR{power/control}="auto"
# Disable runtime PM for NVIDIA VGA/3D controller devices on driver unbind
ACTION=="unbind", SUBSYSTEM=="pci", ATTR{vendor}=="0x10de", ATTR{class}=="0x030000", TEST=="power/control", ATTR{power/control}="on"
ACTION=="unbind", SUBSYSTEM=="pci", ATTR{vendor}=="0x10de", ATTR{class}=="0x030200", TEST=="power/control", ATTR{power/control}="on"
'';
boot.extraModprobeConfig = mkIf cfg.powerManagement.finegrained ''
options nvidia "NVreg_DynamicPowerManagement=0x02"
'';
boot.blacklistedKernelModules = [ "nouveau" "nvidiafb" ];