diff options
| -rw-r--r-- | gnu/build/linux-modules.scm | 61 |
1 files changed, 60 insertions, 1 deletions
diff --git a/gnu/build/linux-modules.scm b/gnu/build/linux-modules.scm index 053720574b..09cf752bef 100644 --- a/gnu/build/linux-modules.scm +++ b/gnu/build/linux-modules.scm @@ -1,5 +1,5 @@ ;;; GNU Guix --- Functional package management for GNU -;;; Copyright © 2014, 2016, 2018, 2019 Ludovic Courtès <ludo@gnu.org> +;;; Copyright © 2014, 2016, 2018, 2019, 2022 Ludovic Courtès <ludo@gnu.org> ;;; Copyright © 2017 Mathieu Othacehe <m.othacehe@gmail.com> ;;; Copyright © 2018 Danny Milosavljevic <dannym@scratchpost.org> ;;; @@ -28,6 +28,7 @@ #:use-module (rnrs io ports) #:use-module (rnrs bytevectors) #:use-module (srfi srfi-1) + #:use-module (srfi srfi-9 gnu) #:use-module (srfi srfi-11) #:use-module (srfi srfi-26) #:use-module (ice-9 ftw) @@ -50,6 +51,16 @@ load-linux-module* load-linux-modules-from-directory + pci-devices + pci-device? + pci-device-vendor + pci-device-id + pci-device-class + pci-device-module-alias + storage-pci-device? + network-pci-device? + display-pci-device? + current-module-debugging-port device-module-aliases @@ -429,6 +440,54 @@ key such as 'MAJOR or 'DEVTYPE and each cdr is the corresponding value." (line (loop (cons (key=value->pair line) result)))))) +;; PCI device known to the Linux kernel. +(define-immutable-record-type <pci-device> + (pci-device vendor device class module-alias) + pci-device? + (vendor pci-device-vendor) ;integer + (device pci-device-id) ;integer + (class pci-device-class) ;integer + (module-alias pci-device-module-alias)) ;string | #f + +(define (pci-device-class-predicate mask bits) + (lambda (device) + "Return true if DEVICE has the chosen class." + (= (logand mask (pci-device-class device)) bits))) + +(define storage-pci-device? ;"Mass storage controller" class + (pci-device-class-predicate #xff0000 #x010000)) +(define network-pci-device? ;"Network controller" class + (pci-device-class-predicate #xff0000 #x020000)) +(define display-pci-device? ;"Display controller" class + (pci-device-class-predicate #xff0000 #x030000)) + +(define (pci-devices) + "Return the list of PCI devices of the system (<pci-device> records)." + (define (read-hex port) + (let ((line (read-line port))) + (and (string? line) + (string-prefix? "0x" line) + (string->number (string-drop line 2) 16)))) + + (filter-map (lambda (directory) + (define properties + (call-with-input-file (string-append directory "/uevent") + read-uevent)) + (define vendor + (call-with-input-file (string-append directory "/vendor") + read-hex)) + (define device + (call-with-input-file (string-append directory "/device") + read-hex)) + (define class + (call-with-input-file (string-append directory "/class") + read-hex)) + + (pci-device vendor device class + (assq-ref properties 'MODALIAS))) + (find-files "/sys/bus/pci/devices" + #:stat lstat))) + (define (device-module-aliases device) "Return the list of module aliases required by DEVICE, a /dev file name, as in this example: |