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Commit | Line | Data |
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f0765c71 DC |
1 | package PVE::SysFSTools; |
2 | ||
3 | use strict; | |
4 | use warnings; | |
5 | ||
6 | use IO::File; | |
7 | ||
8 | use PVE::Tools qw(file_read_firstline dir_glob_foreach); | |
9 | ||
10 | my $pcisysfs = "/sys/bus/pci"; | |
bf94e590 | 11 | my $pciregex = "([a-f0-9]{4}):([a-f0-9]{2}):([a-f0-9]{2})\.([a-f0-9])"; |
f0765c71 DC |
12 | |
13 | sub lspci { | |
4ca3851c | 14 | my ($filter) = @_; |
f0765c71 DC |
15 | |
16 | my $devices = {}; | |
17 | ||
bf94e590 DC |
18 | dir_glob_foreach("$pcisysfs/devices", $pciregex, sub { |
19 | my (undef, undef, $bus, $slot, $function) = @_; | |
20 | my $id = "$bus:$slot"; | |
4ca3851c | 21 | return if defined($filter) && $id ne $filter; |
f0765c71 DC |
22 | my $res = { id => $id, function => $function}; |
23 | push @{$devices->{$id}}, $res; | |
24 | }); | |
25 | ||
26 | # Entries should be sorted by functions. | |
27 | foreach my $id (keys %$devices) { | |
28 | my $dev = $devices->{$id}; | |
29 | $devices->{$id} = [ sort { $a->{function} <=> $b->{function} } @$dev ]; | |
30 | } | |
31 | ||
32 | return $devices; | |
33 | } | |
34 | ||
35 | sub check_iommu_support{ | |
36 | #fixme : need to check IOMMU support | |
37 | #http://www.linux-kvm.org/page/How_to_assign_devices_with_VT-d_in_KVM | |
38 | ||
39 | my $iommu=1; | |
40 | return $iommu; | |
41 | ||
42 | } | |
43 | ||
44 | sub file_write { | |
45 | my ($filename, $buf) = @_; | |
46 | ||
47 | my $fh = IO::File->new($filename, "w"); | |
48 | return undef if !$fh; | |
49 | ||
50 | my $res = print $fh $buf; | |
51 | ||
52 | $fh->close(); | |
53 | ||
54 | return $res; | |
55 | } | |
56 | ||
57 | sub pci_device_info { | |
58 | my ($name) = @_; | |
59 | ||
60 | my $res; | |
61 | ||
bf94e590 | 62 | return undef if $name !~ m/^${pciregex}$/; |
f0765c71 DC |
63 | my ($domain, $bus, $slot, $func) = ($1, $2, $3, $4); |
64 | ||
65 | my $irq = file_read_firstline("$pcisysfs/devices/$name/irq"); | |
66 | return undef if !defined($irq) || $irq !~ m/^\d+$/; | |
67 | ||
68 | my $vendor = file_read_firstline("$pcisysfs/devices/$name/vendor"); | |
69 | return undef if !defined($vendor) || $vendor !~ s/^0x//; | |
70 | ||
71 | my $product = file_read_firstline("$pcisysfs/devices/$name/device"); | |
72 | return undef if !defined($product) || $product !~ s/^0x//; | |
73 | ||
74 | $res = { | |
75 | name => $name, | |
76 | vendor => $vendor, | |
77 | product => $product, | |
78 | domain => $domain, | |
79 | bus => $bus, | |
80 | slot => $slot, | |
81 | func => $func, | |
82 | irq => $irq, | |
83 | has_fl_reset => -f "$pcisysfs/devices/$name/reset" || 0, | |
84 | }; | |
85 | ||
86 | return $res; | |
87 | } | |
88 | ||
89 | sub pci_dev_reset { | |
90 | my ($dev) = @_; | |
91 | ||
92 | my $name = $dev->{name}; | |
93 | ||
94 | my $fn = "$pcisysfs/devices/$name/reset"; | |
95 | ||
96 | return file_write($fn, "1"); | |
97 | } | |
98 | ||
99 | sub pci_dev_bind_to_vfio { | |
100 | my ($dev) = @_; | |
101 | ||
102 | my $name = $dev->{name}; | |
103 | ||
104 | my $vfio_basedir = "$pcisysfs/drivers/vfio-pci"; | |
105 | ||
106 | if (!-d $vfio_basedir) { | |
107 | system("/sbin/modprobe vfio-pci >/dev/null 2>/dev/null"); | |
108 | } | |
109 | die "Cannot find vfio-pci module!\n" if !-d $vfio_basedir; | |
110 | ||
111 | my $testdir = "$vfio_basedir/$name"; | |
112 | return 1 if -d $testdir; | |
113 | ||
114 | my $data = "$dev->{vendor} $dev->{product}"; | |
115 | return undef if !file_write("$vfio_basedir/new_id", $data); | |
116 | ||
117 | my $fn = "$pcisysfs/devices/$name/driver/unbind"; | |
118 | if (!file_write($fn, $name)) { | |
119 | return undef if -f $fn; | |
120 | } | |
121 | ||
122 | $fn = "$vfio_basedir/bind"; | |
123 | if (! -d $testdir) { | |
124 | return undef if !file_write($fn, $name); | |
125 | } | |
126 | ||
127 | return -d $testdir; | |
128 | } | |
129 | ||
130 | sub pci_dev_group_bind_to_vfio { | |
131 | my ($pciid) = @_; | |
132 | ||
133 | my $vfio_basedir = "$pcisysfs/drivers/vfio-pci"; | |
134 | ||
135 | if (!-d $vfio_basedir) { | |
136 | system("/sbin/modprobe vfio-pci >/dev/null 2>/dev/null"); | |
137 | } | |
138 | die "Cannot find vfio-pci module!\n" if !-d $vfio_basedir; | |
139 | ||
140 | # get IOMMU group devices | |
141 | opendir(my $D, "$pcisysfs/devices/0000:$pciid/iommu_group/devices/") || die "Cannot open iommu_group: $!\n"; | |
142 | my @devs = grep /^0000:/, readdir($D); | |
143 | closedir($D); | |
144 | ||
145 | foreach my $pciid (@devs) { | |
146 | $pciid =~ m/^([:\.\da-f]+)$/ or die "PCI ID $pciid not valid!\n"; | |
147 | ||
148 | # pci bridges, switches or root ports are not supported | |
149 | # they have a pci_bus subdirectory so skip them | |
150 | next if (-e "$pcisysfs/devices/$pciid/pci_bus"); | |
151 | ||
152 | my $info = pci_device_info($1); | |
153 | pci_dev_bind_to_vfio($info) || die "Cannot bind $pciid to vfio\n"; | |
154 | } | |
155 | ||
156 | return 1; | |
157 | } | |
158 | ||
159 | 1; |