From afbd4d8470ad2e0b3bd5dd84b983bb343b4451f9 Mon Sep 17 00:00:00 2001 From: Ludovic Courtès Date: Thu, 3 Nov 2022 14:37:45 +0100 Subject: linux-modules: Add 'load-pci-device-database'. * gnu/build/linux-modules.scm (read-pci-device-database) (load-pci-device-database): New procedures. --- gnu/build/linux-modules.scm | 74 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 74 insertions(+) diff --git a/gnu/build/linux-modules.scm b/gnu/build/linux-modules.scm index 09cf752bef..3b1f512663 100644 --- a/gnu/build/linux-modules.scm +++ b/gnu/build/linux-modules.scm @@ -60,6 +60,7 @@ (define-module (gnu build linux-modules) storage-pci-device? network-pci-device? display-pci-device? + load-pci-device-database current-module-debugging-port @@ -488,6 +489,79 @@ (define class (find-files "/sys/bus/pci/devices" #:stat lstat))) +(define (read-pci-device-database port) + "Parse the 'pci.ids' database that ships with the pciutils package and is +maintained at ." + (define (comment? str) + (string-prefix? "#" (string-trim str))) + (define (blank? str) + (string-null? (string-trim-both str))) + (define (device? str) + (eqv? #\tab (string-ref str 0))) + (define (subvendor? str) + (string-prefix? "\t\t" str)) + (define (class? str) + (string-prefix? "C " str)) + (define (parse-id-line str) + (let* ((str (string-trim-both str)) + (space (string-index str char-set:whitespace))) + (values (string->number (string-take str space) 16) + (string-trim (string-drop str (+ 1 space)))))) + (define (finish vendor vendor-id devices table) + (fold (lambda (device table) + (match device + ((device-id . name) + (vhash-consv (logior (ash vendor-id 16) device-id) + (cons vendor name) + table)))) + table + devices)) + + (let loop ((table vlist-null) + (vendor-id #f) + (vendor #f) + (devices '())) + (match (read-line port) + ((? eof-object?) + (let ((table (if (and vendor vendor-id) + (finish vendor vendor-id devices table) + table))) + (lambda (vendor device) + (match (vhash-assv (logior (ash vendor 16) device) table) + (#f + (values #f #f)) + ((_ . (vendor . name)) + (values vendor name)))))) + ((? comment?) + (loop table vendor-id vendor devices)) + ((? blank?) + (loop table vendor-id vendor devices)) + ((? subvendor?) ;currently ignored + (loop table vendor-id vendor devices)) + ((? class?) ;currently ignored + (loop table vendor-id vendor devices)) + ((? device? line) + (let-values (((id name) (parse-id-line line))) + (loop table vendor-id vendor + (if (and vendor-id vendor) ;class or device? + (alist-cons id name devices) + devices)))) + (line + (let ((table (if (and vendor vendor-id) + (finish vendor vendor-id devices table) + table))) + (let-values (((vendor-id vendor) (parse-id-line line))) + (loop table vendor-id vendor '()))))))) + +(define (load-pci-device-database file) + "Read the 'pci.ids' database at FILE (get it from the pciutils package or +from ) and return a lookup procedure that takes a PCI +vendor ID and a device ID (two integers) and returns the vendor name and +device name as two values." + (let ((port (open-file file "r0"))) + (call-with-gzip-input-port port + read-pci-device-database))) + (define (device-module-aliases device) "Return the list of module aliases required by DEVICE, a /dev file name, as in this example: -- cgit v1.2.3