src/util/get-pci-ids

   1 #! /usr/bin/perl -w
   2
   3 # get-pci-ids: extract pci vendor/device ids from linux net drivers
   4
   5 # Copyright (C) 2003 Georg Baum <gbaum@users.sf.net>
   6
   7 # This program is free software; you can redistribute it and/or modify
   8 # it under the terms of the GNU General Public License as published by
   9 # the Free Software Foundation; either version 2 of the License, or
  10 # (at your option) any later version.
  11
  12 # This program is distributed in the hope that it will be useful,
  13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 # GNU General Public License for more details.
  16
  17 # You should have received a copy of the GNU General Public License
  18 # along with this program; if not, write to the Free Software
  19 # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  20
  21
  22 # Known bugs/limitations:
  23 # - Does not recognize all drivers because some require special cflags.
  24 #   Fails also on some drivers that do belong to other architectures
  25 #   than the one of the machine this script is running on.
  26 #   This is currently not so important because all drivers that have an
  27 #   Etherboot counterpart are recognized.
  28
  29
  30 use strict;
  31 use File::Basename "dirname";
  32 use POSIX "uname";
  33
  34 # Where to find the kernel sources
  35 my $kernel_src = "/usr/src/linux";
  36
  37 if($#ARGV >= 0) {
  38         $kernel_src = shift;
  39 }
  40
  41 # Sanity checks
  42 if($#ARGV >= 0) {
  43         print STDERR "Too many arguments.\n";
  44         print STDERR "Usage: get-pci-ids [path to kernel sources]\n";
  45         print STDERR "       /usr/src/linux is assumed if no path is given.\n";
  46         exit 1;
  47 }
  48
  49 unless(-f "$kernel_src/include/linux/version.h") {
  50         print STDERR "Could not find $kernel_src/include/linux/version.h.\n";
  51         print STDERR "$kernel_src is probably no Linux kernel source tree.\n";
  52         exit 1;
  53 }
  54
  55 # Flags that are needed to preprocess the drivers.
  56 # Some drivers need optimization
  57 my $cflags="-D__KERNEL__ -I$kernel_src/include -I$kernel_src/net/inet -O2";
  58
  59 # The C preprocessor. It needs to spit out the preprocessed source on stdout.
  60 my $cpp="gcc -E";
  61
  62 # List of drivers. We parse every .c file. It does not harm if it does not contain a driver.
  63 my @drivers = split /\s+/, `find $kernel_src/drivers/net -name '*.c' | sort`;
  64
  65 # Kernel version
  66 my $version = `grep UTS_RELEASE $kernel_src/include/linux/version.h`;
  67 chomp $version;
  68 $version =~ s/\s*#define\s+UTS_RELEASE\s+"(\S+)".*$/$1/g;
  69
  70 # Architecture
  71 my @uname = uname();
  72
  73
  74 # Print header
  75 print "# PCI vendor/device ids extracted from Linux $version on $uname[4] at " . gmtime() . "\n";
  76
  77 my $driver;
  78
  79 # Process the drivers
  80 foreach $driver (@drivers) {
  81
  82         # Preprocess to expand macros
  83         my $command = "$cpp $cflags -I" . dirname($driver) . " $driver";
  84         open  DRIVER, "$command |" or die "Could not execute\n\"$command\".\n";
  85
  86         # Extract the pci_device_id structure
  87         my $found = 0;
  88         my $line = "";
  89         my @lines;
  90         while(<DRIVER>) {
  91                 if(/^\s*static\s+struct\s+pci_device_id/) {
  92                         # This file contains a driver. Print the name.
  93                         $driver =~ s!$kernel_src/drivers/net/!!g;
  94                         print "\n$driver\n";
  95                         $found = 1;
  96                         next;
  97                 }
  98                 if($found == 1){
  99                         if(/\};/ or /{\s*0\s*,?\s*}/) {
 100                                 # End of struct
 101                                 $found = 0;
 102                         } else {
 103                                 chomp;
 104                                 if(/\}\s*,?\s*\n?$/) {
 105                                         # This line contains a full entry or the last part of it.
 106                                         $_ = $line . $_;
 107                                         $line = "";
 108                                         s/[,\{\};\(\)]//g;      # Strip punctuation
 109                                         s/^\s+//g;              # Eat whitespace at beginning of line
 110                                         tr[A-Z][a-z];           # Convert to lowercase
 111                                         # Push the vendor and device id to @lines if this line is not empty.
 112                                         # We ignore everything else that might be there
 113                                         my ($vendor_id, $device_id, $remainder) = split /\W+/, $_, 3;
 114                                         push @lines, "$vendor_id $device_id\n" if($vendor_id && $device_id);
 115                                 } else {
 116                                         # This line does contain a partial entry. Remember it.
 117                                         $line .= "$_ ";
 118                                 }
 119                         }
 120                 }
 121         }
 122         close DRIVER;           # No "or die", because $cpp fails on some files
 123
 124         # Now print out the sorted values
 125         @lines = sort @lines;
 126         my $lastline = "";
 127         foreach(@lines) {
 128                 # Print each vendor/device id combination only once.
 129                 # Some drivers (e.g. e100) do contain subfamilies
 130                 print if($_ ne $lastline);
 131                 $lastline = $_;
 132         }
 133 }
 134
 135