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#!/usr/bin/perl
use lib qw(/usr/lib/libDrakX);
use File::FnMatch;
use MDK::Common;
use list_modules;
use modalias;
#- known bugs:
#- o does not match subvendors, they have to be handled on a case-by-case basis
#- o does not match PCI class (thus ahci won't match jmicron devices)
my @ignored_modules = (
"intelfb", "savagefb", "tdfxfb", qr/_agp$/,
qr/_rng$/,
);
my @preferred_modules = (
"ahci", #- prefer over ata_piix (install will still try both), depends on BIOS settins
#- do not prefer ata_piix, since it would override piix choice
"bcm43xx", #- prefer over b43, b43legacy and ssb
"dpt_i2o", #- prefer over i2o_core
"dmfe", #- prefer over tulip, it only lists supported devices
"c4", #- subvendors listed in c4 driver seems not to be supported by DAC960
"i2c_viapro", #- prefer over via686a
"ipr", #- subvendors listed in ipr driver seems not to be supported by DAC960
"mxser_new", #- experimental clone of mxser
"pata_netcell", "pata_ns87410", #- no non-libata implementation, prefer over generic module
"prism54", #- prefer over p54pci
"ipw3945", #- prefer over iwl3945, which has some stability/performance issues
"rt2400", "rt2500", "rt2570", "rt61", "rt73", #- prefer legacy Ralink drivers
"skge", #- prefer over sk98lin
qr/^snd_/, #- prefer alsa drivers
"sx", #- prefer over specialix (sx matches subvendors)
);
my @depreciated_modules = (
"generic", #- prefer full implementation
"gspca", #- kernel hackers value it as poorly coded
"ir_usb", #- false positive because of pattern
qr/^pata_/, #- don't use libata drivers for now
"usb_storage", #- false positive because we don't use subvendors/subdevices
"snd_usb_audio", #- prefer video camera drivers if any
);
my @preferred_categories = (
"disk/ide",
"disk/scsi",
);
#- For the following categories, the deferred modules are ignored, and
#- an explicit alias is set even if only one module match exactly.
#- This allows to workaround modules having class wildcards, which isn't supported.
my %category_deferred_modules = (
#- prefer "generic" non-libata module or full implementation
"disk/ide" => [ "ata_generic" ],
"disk/sata" => [ "ata_generic", "pata_acpi" ],
"input/tablet" => [ "usbmouse" ],
);
sub build_modalias {
my ($class, $vendor, $device) = @_;
{
pci => "pci:v0000${vendor}d0000${device}sv*sd*bc*i*",
usb => "usb:v${vendor}p${device}d*dc*dsc*dp*ic*isc*ip*",
}->{$class};
}
sub match_module {
my ($module, $pattern) = @_;
ref $pattern eq 'Regexp' ? $module =~ $pattern : $module eq $pattern;
}
sub grep_non_matching {
my ($modules, $list) = @_;
grep {
my $m = $_->[1];
every { !match_module($m, $_) } @$list;
} @$modules;
}
sub grep_matching {
my ($modules, $list) = @_;
grep {
my $m = $_->[1];
grep { match_module($m, $_) } @$list;
} @$modules;
}
sub print_module {
my ($modalias, $aliases, $class_other) = @_;
my @aliases = group_by2(@$aliases);
my @other = grep { File::FnMatch::fnmatch($_->[0], $modalias) } @$class_other;
my @modules = uniq_ { $_->[1] } @aliases, @other;
@modules or return;
my @category_deferred_modules;
foreach (map { list_modules::module2category($_->[1]) } @modules) {
push @category_deferred_modules, @{$category_deferred_modules{$_} || []}
}
@modules > 1 || @category_deferred_modules or return;
my @non_ignored = grep_non_matching(\@modules, [ @ignored_modules, @category_deferred_modules ]);
if (@non_ignored == 1) {
print "alias $modalias $non_ignored[0][1]\n";
return;
} elsif (@non_ignored == 0) {
print "alias $modalias off\n";
return;
}
@modules = @non_ignored;
my @non_depreciated = grep_non_matching(\@modules, \@depreciated_modules);
if (@non_depreciated == 1) {
print "alias $modalias $non_depreciated[0][1]\n";
return;
}
@modules = @non_depreciated if @non_depreciated > 1;
my @preferred = grep_matching(\@modules, \@preferred_modules);
@preferred or @preferred = grep { member(module2category($_->[1]), @preferred_categories) } @modules;
if (@preferred == 1) {
print "alias $modalias $preferred[0][1]\n";
return;
}
print STDERR "unable to choose for $modalias " . join(" ", map { $_->[1] } @modules) . "\n";
}
my $alias_group = {};
modalias::parse_path($alias_group, "../lst/fallback-modules.alias");
foreach my $class (qw(pci pcmcia usb)) {
my @class_other = group_by2(@{$alias_group->{$class}{other}});
foreach my $vendor (sort(keys(%{$alias_group->{$class}}))) {
$vendor eq "other" and next;
foreach my $device (sort(keys(%{$alias_group->{$class}{$vendor}}))) {
my $modalias = build_modalias($class, $vendor, $device);
print_module($modalias, $alias_group->{$class}{$vendor}{$device}, \@class_other);
}
}
}
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