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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 $pciregex = "([a-f0-9]{4}):([a-f0-9]{2}):([a-f0-9]{2})\.([a-f0-9])"; |
f0765c71 DC |
12 | |
13 | sub lspci { | |
b5dacd10 | 14 | my ($id_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) = @_; | |
b5dacd10 | 20 | |
bf94e590 | 21 | my $id = "$bus:$slot"; |
b5dacd10 TL |
22 | return if defined($id_filter) && $id_filter ne $id; |
23 | ||
24 | push @{$devices->{$id}}, { id => $id, function => $function }; | |
f0765c71 DC |
25 | }); |
26 | ||
27 | # Entries should be sorted by functions. | |
28 | foreach my $id (keys %$devices) { | |
29 | my $dev = $devices->{$id}; | |
30 | $devices->{$id} = [ sort { $a->{function} <=> $b->{function} } @$dev ]; | |
31 | } | |
32 | ||
33 | return $devices; | |
34 | } | |
35 | ||
36 | sub check_iommu_support{ | |
63075acb | 37 | # we have IOMMU support if /sys/class/iommu/ is populated |
a923104f | 38 | return PVE::Tools::dir_glob_regex('/sys/class/iommu/', "[^\.].*"); |
f0765c71 DC |
39 | } |
40 | ||
41 | sub file_write { | |
42 | my ($filename, $buf) = @_; | |
43 | ||
44 | my $fh = IO::File->new($filename, "w"); | |
45 | return undef if !$fh; | |
46 | ||
47 | my $res = print $fh $buf; | |
48 | ||
49 | $fh->close(); | |
50 | ||
51 | return $res; | |
52 | } | |
53 | ||
54 | sub pci_device_info { | |
55 | my ($name) = @_; | |
56 | ||
57 | my $res; | |
58 | ||
bf94e590 | 59 | return undef if $name !~ m/^${pciregex}$/; |
f0765c71 DC |
60 | my ($domain, $bus, $slot, $func) = ($1, $2, $3, $4); |
61 | ||
62 | my $irq = file_read_firstline("$pcisysfs/devices/$name/irq"); | |
63 | return undef if !defined($irq) || $irq !~ m/^\d+$/; | |
64 | ||
65 | my $vendor = file_read_firstline("$pcisysfs/devices/$name/vendor"); | |
66 | return undef if !defined($vendor) || $vendor !~ s/^0x//; | |
67 | ||
68 | my $product = file_read_firstline("$pcisysfs/devices/$name/device"); | |
69 | return undef if !defined($product) || $product !~ s/^0x//; | |
70 | ||
71 | $res = { | |
72 | name => $name, | |
73 | vendor => $vendor, | |
74 | product => $product, | |
75 | domain => $domain, | |
76 | bus => $bus, | |
77 | slot => $slot, | |
78 | func => $func, | |
79 | irq => $irq, | |
80 | has_fl_reset => -f "$pcisysfs/devices/$name/reset" || 0, | |
81 | }; | |
82 | ||
83 | return $res; | |
84 | } | |
85 | ||
86 | sub pci_dev_reset { | |
87 | my ($dev) = @_; | |
88 | ||
89 | my $name = $dev->{name}; | |
90 | ||
91 | my $fn = "$pcisysfs/devices/$name/reset"; | |
92 | ||
93 | return file_write($fn, "1"); | |
94 | } | |
95 | ||
96 | sub pci_dev_bind_to_vfio { | |
97 | my ($dev) = @_; | |
98 | ||
99 | my $name = $dev->{name}; | |
100 | ||
101 | my $vfio_basedir = "$pcisysfs/drivers/vfio-pci"; | |
102 | ||
103 | if (!-d $vfio_basedir) { | |
104 | system("/sbin/modprobe vfio-pci >/dev/null 2>/dev/null"); | |
105 | } | |
106 | die "Cannot find vfio-pci module!\n" if !-d $vfio_basedir; | |
107 | ||
108 | my $testdir = "$vfio_basedir/$name"; | |
109 | return 1 if -d $testdir; | |
110 | ||
111 | my $data = "$dev->{vendor} $dev->{product}"; | |
112 | return undef if !file_write("$vfio_basedir/new_id", $data); | |
113 | ||
114 | my $fn = "$pcisysfs/devices/$name/driver/unbind"; | |
115 | if (!file_write($fn, $name)) { | |
116 | return undef if -f $fn; | |
117 | } | |
118 | ||
119 | $fn = "$vfio_basedir/bind"; | |
120 | if (! -d $testdir) { | |
121 | return undef if !file_write($fn, $name); | |
122 | } | |
123 | ||
124 | return -d $testdir; | |
125 | } | |
126 | ||
127 | sub pci_dev_group_bind_to_vfio { | |
128 | my ($pciid) = @_; | |
129 | ||
130 | my $vfio_basedir = "$pcisysfs/drivers/vfio-pci"; | |
131 | ||
132 | if (!-d $vfio_basedir) { | |
133 | system("/sbin/modprobe vfio-pci >/dev/null 2>/dev/null"); | |
134 | } | |
135 | die "Cannot find vfio-pci module!\n" if !-d $vfio_basedir; | |
136 | ||
137 | # get IOMMU group devices | |
138 | opendir(my $D, "$pcisysfs/devices/0000:$pciid/iommu_group/devices/") || die "Cannot open iommu_group: $!\n"; | |
139 | my @devs = grep /^0000:/, readdir($D); | |
140 | closedir($D); | |
141 | ||
142 | foreach my $pciid (@devs) { | |
143 | $pciid =~ m/^([:\.\da-f]+)$/ or die "PCI ID $pciid not valid!\n"; | |
144 | ||
145 | # pci bridges, switches or root ports are not supported | |
146 | # they have a pci_bus subdirectory so skip them | |
147 | next if (-e "$pcisysfs/devices/$pciid/pci_bus"); | |
148 | ||
149 | my $info = pci_device_info($1); | |
150 | pci_dev_bind_to_vfio($info) || die "Cannot bind $pciid to vfio\n"; | |
151 | } | |
152 | ||
153 | return 1; | |
154 | } | |
155 | ||
6eb61ecd DC |
156 | # idea is from usbutils package (/usr/bin/usb-devices) script |
157 | sub __scan_usb_device { | |
158 | my ($res, $devpath, $parent, $level) = @_; | |
159 | ||
160 | return if ! -d $devpath; | |
161 | return if $level && $devpath !~ m/^.*[-.](\d+)$/; | |
162 | my $port = $level ? int($1 - 1) : 0; | |
163 | ||
164 | my $busnum = int(file_read_firstline("$devpath/busnum")); | |
165 | my $devnum = int(file_read_firstline("$devpath/devnum")); | |
166 | ||
167 | my $d = { | |
168 | port => $port, | |
169 | level => $level, | |
170 | busnum => $busnum, | |
171 | devnum => $devnum, | |
172 | speed => file_read_firstline("$devpath/speed"), | |
173 | class => hex(file_read_firstline("$devpath/bDeviceClass")), | |
174 | vendid => file_read_firstline("$devpath/idVendor"), | |
175 | prodid => file_read_firstline("$devpath/idProduct"), | |
176 | }; | |
177 | ||
178 | if ($level) { | |
179 | my $usbpath = $devpath; | |
180 | $usbpath =~ s|^.*/\d+\-||; | |
181 | $d->{usbpath} = $usbpath; | |
182 | } | |
183 | ||
184 | my $product = file_read_firstline("$devpath/product"); | |
185 | $d->{product} = $product if $product; | |
186 | ||
187 | my $manu = file_read_firstline("$devpath/manufacturer"); | |
188 | $d->{manufacturer} = $manu if $manu; | |
189 | ||
190 | my $serial => file_read_firstline("$devpath/serial"); | |
191 | $d->{serial} = $serial if $serial; | |
192 | ||
193 | push @$res, $d; | |
194 | ||
195 | foreach my $subdev (<$devpath/$busnum-*>) { | |
196 | next if $subdev !~ m|/$busnum-[0-9]+(\.[0-9]+)*$|; | |
197 | __scan_usb_device($res, $subdev, $devnum, $level + 1); | |
198 | } | |
199 | ||
200 | }; | |
201 | ||
202 | sub scan_usb { | |
203 | ||
204 | my $devlist = []; | |
205 | ||
206 | foreach my $device (</sys/bus/usb/devices/usb*>) { | |
207 | __scan_usb_device($devlist, $device, 0, 0); | |
208 | } | |
209 | ||
210 | return $devlist; | |
211 | } | |
212 | ||
f0765c71 | 213 | 1; |