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nixos/nvidia: implement prime render offload

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Edmund Wu 2019-08-14 12:41:15 -04:00
parent 632a8a7bb2
commit 026b6010ef
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GPG Key ID: 76AA3F9F2BD3E3A0
1 changed files with 38 additions and 10 deletions
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48
nixos/modules/hardware/video/nvidia.nix
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@ -36,6 +36,8 @@ let
cfg = config.hardware.nvidia;
pCfg = cfg.prime;
syncCfg = pCfg.sync;
offloadCfg = pCfg.offload;
primeEnabled = syncCfg.enable || offloadCfg.enable;
in
{
@ -115,6 +117,18 @@ in
Configure X to allow external NVIDIA GPUs when using optimus.
'';
};
hardware.nvidia.prime.offload.enable = mkOption {
type = types.bool;
default = false;
description = ''
Enable render offload support using the NVIDIA proprietary driver via PRIME.
If this is enabled, then the bus IDs of the NVIDIA and Intel GPUs have to be
specified (<option>hardware.nvidia.prime.nvidiaBusId</option> and
<option>hardware.nvidia.prime.intelBusId</option>).
'';
};
};
config = mkIf enabled {
@ -125,11 +139,19 @@ in
}
{
assertion = syncCfg.enable -> pCfg.nvidiaBusId != "" && pCfg.intelBusId != "";
assertion = primeEnabled -> pCfg.nvidiaBusId != "" && pCfg.intelBusId != "";
message = ''
When NVIDIA Optimus via PRIME is enabled, the GPU bus IDs must configured.
When NVIDIA PRIME is enabled, the GPU bus IDs must configured.
'';
}
{
assertion = offloadCfg.enable -> versionAtLeast nvidia_x11.version "435.21";
message = "NVIDIA PRIME render offload is currently only supported on versions >= 435.21.";
}
{
assertion = !(syncCfg.enable && offloadCfg.enable);
message = "Only one NVIDIA PRIME solution may be used at a time.";
}
];
# If Optimus/PRIME is enabled, we:
@ -144,18 +166,20 @@ in
# - Configure the display manager to run specific `xrandr` commands which will
# configure/enable displays connected to the Intel GPU.
services.xserver.drivers = optional syncCfg.enable {
services.xserver.useGlamor = mkDefault offloadCfg.enable;
services.xserver.drivers = optional primeEnabled {
name = "modesetting";
display = false;
display = offloadCfg.enable;
deviceSection = ''
BusID "${pCfg.intelBusId}"
Option "AccelMethod" "none"
${optionalString syncCfg.enable ''Option "AccelMethod" "none"''}
'';
} ++ singleton {
name = "nvidia";
modules = [ nvidia_x11.bin ];
display = true;
deviceSection = optionalString syncCfg.enable
display = !offloadCfg.enable;
deviceSection = optionalString primeEnabled
''
BusID "${pCfg.nvidiaBusId}"
${optionalString syncCfg.allowExternalGpu "Option \"AllowExternalGpus\""}
@ -169,6 +193,8 @@ in
services.xserver.serverLayoutSection = optionalString syncCfg.enable ''
Inactive "Device-modesetting[0]"
'' + optionalString offloadCfg.enable ''
Option "AllowNVIDIAGPUScreens"
'';
services.xserver.displayManager.setupCommands = optionalString syncCfg.enable ''
@ -181,8 +207,10 @@ in
source = "${nvidia_x11.bin}/share/nvidia/nvidia-application-profiles-rc";
};
hardware.opengl.package = nvidia_x11.out;
hardware.opengl.package32 = nvidia_libs32;
hardware.opengl.package = mkIf (!offloadCfg.enable) nvidia_x11.out;
hardware.opengl.package32 = mkIf (!offloadCfg.enable) nvidia_libs32;
hardware.opengl.extraPackages = optional offloadCfg.enable nvidia_x11.out;
hardware.opengl.extraPackages32 = optional offloadCfg.enable nvidia_libs32;
environment.systemPackages = [ nvidia_x11.bin nvidia_x11.settings ]
++ filter (p: p != null) [ nvidia_x11.persistenced ];
@ -199,7 +227,7 @@ in
optionals config.services.xserver.enable [ "nvidia" "nvidia_modeset" "nvidia_drm" ];
# If requested enable modesetting via kernel parameter.
boot.kernelParams = optional cfg.modesetting.enable "nvidia-drm.modeset=1";
boot.kernelParams = optional (offloadCfg.enable || cfg.modesetting.enable) "nvidia-drm.modeset=1";
# Create /dev/nvidia-uvm when the nvidia-uvm module is loaded.
services.udev.extraRules =