nongnu: Add nvidia-service-type.

* nongnu/services/nvidia.scm: New file.
(<nvidia-configuration>): New data type.
(nvidia-shepherd-service,nvidia-service-type): New variables.
* nongnu/packages/nvidia.scm (nvidia-driver)[description]: Adjust accordingly.

Signed-off-by: Jonathan Brielmaier <jonathan.brielmaier@web.de>

nongnu/packages/nvidia.scm

@@ -256,12 +256,12 @@ KERNEL==\"nvidia_uvm\", RUN+=\"@sh@ -c '@mknod@ -m 666 /dev/nvidia-uvm-tools c $
            wayland))
     (home-page "https://www.nvidia.com")
     (synopsis "Proprietary NVIDIA driver")
-    (description "This is the evil NVIDIA driver.  Don't forget to add
+    (description
-@code{nvidia-driver} to the @code{udev-rules} in your @file{config.scm}:
+     "This is the evil NVIDIA driver.  Don't forget to add @code{service
-@code{(simple-service 'custom-udev-rules udev-service-type (list
+nvidia-service-type} to your @file{config.scm}.  Further xorg should be
-nvidia-driver))}.  Further xorg should be configured by adding: @code{(modules
+configured by adding: @code{(modules (cons* nvidia-driver
-(cons* nvidia-driver %default-xorg-modules)) (drivers '(\"nvidia\"))} to
+%default-xorg-modules)) (drivers '(\"nvidia\"))} to @code{xorg-configuration}.
-@code{xorg-configuration}.")
+")
     (license
      (license:nonfree
       (format #f "file:///share/doc/nvidia-driver-~a/LICENSE" version)))))

nongnu/services/nvidia.scm

@@ -0,0 +1,71 @@
+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2022 Hilton Chain <hako@ultrarare.space>
+;;;
+;;; This file is not part of GNU Guix.
+;;;
+;;; This program is free software: you can redistribute it and/or modify
+;;; it under the terms of the GNU General Public License as published by
+;;; the Free Software Foundation, either version 3 of the License, or
+;;; (at your option) any later version.
+;;;
+;;; This program is distributed in the hope that it will be useful,
+;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+;;; GNU General Public License for more details.
+;;;
+;;; You should have received a copy of the GNU General Public License
+;;; along with this program.  If not, see <https://www.gnu.org/licenses/>.
+
+(define-module (nongnu services nvidia)
+  #: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 (guix gexp)
+  #:use-module (guix records)
+  #: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?
+  (nvidia-driver   nvidia-configuration-nvidia-driver
+                   (default (list nvidia-driver)))         ; list of file-like
+  (nvidia-firmware nvidia-configuration-nvidia-firmware
+                   (default (list nvidia-firmware)))       ; list of file-like
+  (nvidia-module   nvidia-configuration-nvidia-module
+                   (default (list nvidia-module)))         ; list of file-like
+  (modules         nvidia-configuration-modules
+                   (default (list "nvidia-uvm"))))         ; list of string
+
+(define (nvidia-shepherd-service config)
+  (list (shepherd-service
+         (documentation "Unload nvidia-uvm module on powering off.")
+         (provision '(nvidia))
+         (requirement '(user-processes))
+         (start #~(const #t))
+         (stop #~(lambda _
+                   (let ((rmmod #$(file-append kmod "/bin/rmmod")))
+                     (zero? (system* rmmod "nvidia-uvm"))))))))
+
+(define nvidia-service-type
+  (service-type
+   (name 'nvidia)
+   (extensions
+    (list (service-extension shepherd-root-service-type
+                             nvidia-shepherd-service)
+          (service-extension udev-service-type
+                             nvidia-configuration-nvidia-driver)
+          (service-extension firmware-service-type
+                             nvidia-configuration-nvidia-firmware)
+          (service-extension linux-loadable-module-service-type
+                             nvidia-configuration-nvidia-module)
+          (service-extension kernel-module-loader-service-type
+                             nvidia-configuration-modules)))
+   (default-value (nvidia-configuration))
+   (description "Load NVIDIA modules.")))