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;;; SPDX-License-Identifier: GPL-3.0-or-later
;;; Copyright © 2022, 2024 Hilton Chain <hako@ultrarare.space>
(define-module (nongnu services nvidia)
#:use-module (guix gexp)
#:use-module (guix records)
#:use-module (gnu packages)
#:use-module (gnu packages linux)
#:use-module (gnu services)
#:use-module (gnu services base)
#:use-module (gnu services linux)
#:use-module (gnu services shepherd)
#:use-module (nongnu packages nvidia)
#:export (nvidia-configuration
nvidia-configuration?
nvidia-configuration-record?
nvidia-service-type))
(define-record-type* <nvidia-configuration>
nvidia-configuration make-nvidia-configuration
nvidia-configuration?
(driver nvidia-configuration-driver
(default nvda)) ; file-like
(firmware nvidia-configuration-firmware
(default nvidia-firmware)) ; file-like
(module nvidia-configuration-module
(default nvidia-module))) ; file-like
(define (nvidia-shepherd-service config)
(let ((nvidia-driver (nvidia-configuration-driver config))
(nvidia-smi (file-append nvidia-driver "/bin/nvidia-smi")))
(list (shepherd-service
(documentation "Prepare system environment for NVIDIA driver.")
(provision '(nvidia))
(requirement '(udev))
(one-shot? #t)
(modules '(((guix build utils) #:select (invoke/quiet))
((rnrs io ports) #:select (get-line))))
(start
#~(lambda _
(when (file-exists? "/proc/driver/nvidia")
(let ((modprobe (call-with-input-file
"/proc/sys/kernel/modprobe" get-line)))
(false-if-exception
(begin
(invoke/quiet modprobe "--" "nvidia_uvm")
(invoke/quiet #$nvidia-smi)))))))))))
(define nvidia-service-type
(service-type
(name 'nvidia)
(extensions
(list (service-extension shepherd-root-service-type
nvidia-shepherd-service)
(service-extension profile-service-type
(compose list nvidia-configuration-driver))
(service-extension udev-service-type
(compose list nvidia-configuration-driver))
(service-extension firmware-service-type
(compose list nvidia-configuration-firmware))
(service-extension linux-loadable-module-service-type
(compose list nvidia-configuration-module))))
(default-value (nvidia-configuration))
(description "Prepare system environment for NVIDIA driver.")))
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