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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 $pciregex = "([a-f0-9]{4}):([a-f0-9]{2}):([a-f0-9]{2})\.([a-f0-9])"; |
f0765c71 DC |
12 | |
13 | sub lspci { | |
b5dacd10 | 14 | my ($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 $devices; | |
34 | } | |
35 | ||
44a4db5b DC |
36 | sub get_mdev_types { |
37 | my ($id) = @_; | |
38 | ||
39 | my $fullid = $id; | |
40 | if ($id !~ m/^[0-9a-fA-f]{4}:/) { | |
41 | $fullid = "0000:$id"; | |
42 | } | |
43 | ||
44 | my $types = []; | |
45 | ||
46 | my $mdev_path = "$pcisysfs/devices/$fullid/mdev_supported_types"; | |
47 | if (!-d $mdev_path) { | |
48 | return $types; | |
49 | } | |
50 | ||
51 | dir_glob_foreach($mdev_path, '[^\.].*', sub { | |
52 | my ($type) = @_; | |
53 | ||
54 | my $type_path = "$mdev_path/$type"; | |
55 | ||
56 | my $available = int(file_read_firstline("$type_path/available_instances")); | |
57 | my $description = PVE::Tools::file_get_contents("$type_path/description"); | |
58 | ||
59 | push @$types, { | |
60 | type => $type, | |
61 | description => $description, | |
62 | available => $available, | |
63 | }; | |
64 | }); | |
65 | ||
66 | return $types; | |
67 | } | |
68 | ||
f0765c71 | 69 | sub check_iommu_support{ |
63075acb | 70 | # we have IOMMU support if /sys/class/iommu/ is populated |
a923104f | 71 | return PVE::Tools::dir_glob_regex('/sys/class/iommu/', "[^\.].*"); |
f0765c71 DC |
72 | } |
73 | ||
74 | sub file_write { | |
75 | my ($filename, $buf) = @_; | |
76 | ||
77 | my $fh = IO::File->new($filename, "w"); | |
78 | return undef if !$fh; | |
79 | ||
80 | my $res = print $fh $buf; | |
81 | ||
82 | $fh->close(); | |
83 | ||
84 | return $res; | |
85 | } | |
86 | ||
87 | sub pci_device_info { | |
88 | my ($name) = @_; | |
89 | ||
90 | my $res; | |
91 | ||
bf94e590 | 92 | return undef if $name !~ m/^${pciregex}$/; |
f0765c71 DC |
93 | my ($domain, $bus, $slot, $func) = ($1, $2, $3, $4); |
94 | ||
95 | my $irq = file_read_firstline("$pcisysfs/devices/$name/irq"); | |
96 | return undef if !defined($irq) || $irq !~ m/^\d+$/; | |
97 | ||
98 | my $vendor = file_read_firstline("$pcisysfs/devices/$name/vendor"); | |
99 | return undef if !defined($vendor) || $vendor !~ s/^0x//; | |
100 | ||
101 | my $product = file_read_firstline("$pcisysfs/devices/$name/device"); | |
102 | return undef if !defined($product) || $product !~ s/^0x//; | |
103 | ||
104 | $res = { | |
105 | name => $name, | |
106 | vendor => $vendor, | |
107 | product => $product, | |
108 | domain => $domain, | |
109 | bus => $bus, | |
110 | slot => $slot, | |
111 | func => $func, | |
112 | irq => $irq, | |
113 | has_fl_reset => -f "$pcisysfs/devices/$name/reset" || 0, | |
114 | }; | |
115 | ||
116 | return $res; | |
117 | } | |
118 | ||
119 | sub pci_dev_reset { | |
120 | my ($dev) = @_; | |
121 | ||
122 | my $name = $dev->{name}; | |
123 | ||
124 | my $fn = "$pcisysfs/devices/$name/reset"; | |
125 | ||
126 | return file_write($fn, "1"); | |
127 | } | |
128 | ||
129 | sub pci_dev_bind_to_vfio { | |
130 | my ($dev) = @_; | |
131 | ||
132 | my $name = $dev->{name}; | |
133 | ||
134 | my $vfio_basedir = "$pcisysfs/drivers/vfio-pci"; | |
135 | ||
136 | if (!-d $vfio_basedir) { | |
137 | system("/sbin/modprobe vfio-pci >/dev/null 2>/dev/null"); | |
138 | } | |
139 | die "Cannot find vfio-pci module!\n" if !-d $vfio_basedir; | |
140 | ||
141 | my $testdir = "$vfio_basedir/$name"; | |
142 | return 1 if -d $testdir; | |
143 | ||
144 | my $data = "$dev->{vendor} $dev->{product}"; | |
145 | return undef if !file_write("$vfio_basedir/new_id", $data); | |
146 | ||
147 | my $fn = "$pcisysfs/devices/$name/driver/unbind"; | |
148 | if (!file_write($fn, $name)) { | |
149 | return undef if -f $fn; | |
150 | } | |
151 | ||
152 | $fn = "$vfio_basedir/bind"; | |
153 | if (! -d $testdir) { | |
154 | return undef if !file_write($fn, $name); | |
155 | } | |
156 | ||
157 | return -d $testdir; | |
158 | } | |
159 | ||
160 | sub pci_dev_group_bind_to_vfio { | |
161 | my ($pciid) = @_; | |
162 | ||
163 | my $vfio_basedir = "$pcisysfs/drivers/vfio-pci"; | |
164 | ||
165 | if (!-d $vfio_basedir) { | |
166 | system("/sbin/modprobe vfio-pci >/dev/null 2>/dev/null"); | |
167 | } | |
168 | die "Cannot find vfio-pci module!\n" if !-d $vfio_basedir; | |
169 | ||
170 | # get IOMMU group devices | |
171 | opendir(my $D, "$pcisysfs/devices/0000:$pciid/iommu_group/devices/") || die "Cannot open iommu_group: $!\n"; | |
172 | my @devs = grep /^0000:/, readdir($D); | |
173 | closedir($D); | |
174 | ||
175 | foreach my $pciid (@devs) { | |
176 | $pciid =~ m/^([:\.\da-f]+)$/ or die "PCI ID $pciid not valid!\n"; | |
177 | ||
178 | # pci bridges, switches or root ports are not supported | |
179 | # they have a pci_bus subdirectory so skip them | |
180 | next if (-e "$pcisysfs/devices/$pciid/pci_bus"); | |
181 | ||
182 | my $info = pci_device_info($1); | |
183 | pci_dev_bind_to_vfio($info) || die "Cannot bind $pciid to vfio\n"; | |
184 | } | |
185 | ||
186 | return 1; | |
187 | } | |
188 | ||
44a4db5b DC |
189 | sub pci_create_mdev_device { |
190 | my ($pciid, $uuid, $type) = @_; | |
191 | ||
192 | my $basedir = "$pcisysfs/devices/0000:$pciid"; | |
193 | my $mdev_dir = "$basedir/mdev_supported_types"; | |
194 | ||
195 | die "pci device '$pciid' does not support mediated devices \n" | |
196 | if !-d $mdev_dir; | |
197 | ||
198 | die "pci device '$pciid' has no type '$type'\n" | |
199 | if !-d "$mdev_dir/$type"; | |
200 | ||
201 | if (-d "$basedir/$uuid") { | |
202 | # it already exists, checking type | |
203 | my $typelink = readlink("$basedir/$uuid/mdev_type"); | |
204 | my ($existingtype) = $typelink =~ m|/([^/]+)$|; | |
205 | die "mdev instance '$uuid' already exits, but type is not '$type'\n" | |
206 | if $type ne $existingtype; | |
207 | ||
208 | # instance exists, so use it but warn the user | |
209 | warn "mdev instance '$uuid' already existed, using it.\n"; | |
210 | return undef; | |
211 | } | |
212 | ||
213 | my $instances = file_read_firstline("$mdev_dir/$type/available_instances"); | |
214 | my ($avail) = $instances =~ m/^(\d+)$/; | |
215 | die "pci device '$pciid' has no available instances of '$type'\n" | |
216 | if $avail < 1; | |
217 | ||
218 | die "could not create 'type' for pci devices '$pciid'\n" | |
219 | if !file_write("$mdev_dir/$type/create", $uuid); | |
220 | ||
221 | return undef; | |
222 | } | |
223 | ||
224 | sub pci_cleanup_mdev_device { | |
225 | my ($pciid, $uuid) = @_; | |
226 | ||
227 | my $basedir = "$pcisysfs/devices/0000:$pciid/$uuid"; | |
228 | ||
229 | if (! -e $basedir) { | |
230 | return 1; # no cleanup necessary if it does not exist | |
231 | } | |
232 | ||
233 | return file_write("$basedir/remove", "1"); | |
234 | } | |
235 | ||
236 | # encode the hostpci index and vmid into the uuid | |
237 | sub generate_mdev_uuid { | |
238 | my ($vmid, $index) = @_; | |
239 | ||
240 | my $string = sprintf("%08d-0000-0000-0000-%012d", $index, $vmid); | |
241 | ||
242 | return $string; | |
243 | } | |
244 | ||
6eb61ecd DC |
245 | # idea is from usbutils package (/usr/bin/usb-devices) script |
246 | sub __scan_usb_device { | |
247 | my ($res, $devpath, $parent, $level) = @_; | |
248 | ||
249 | return if ! -d $devpath; | |
250 | return if $level && $devpath !~ m/^.*[-.](\d+)$/; | |
251 | my $port = $level ? int($1 - 1) : 0; | |
252 | ||
253 | my $busnum = int(file_read_firstline("$devpath/busnum")); | |
254 | my $devnum = int(file_read_firstline("$devpath/devnum")); | |
255 | ||
256 | my $d = { | |
257 | port => $port, | |
258 | level => $level, | |
259 | busnum => $busnum, | |
260 | devnum => $devnum, | |
261 | speed => file_read_firstline("$devpath/speed"), | |
262 | class => hex(file_read_firstline("$devpath/bDeviceClass")), | |
263 | vendid => file_read_firstline("$devpath/idVendor"), | |
264 | prodid => file_read_firstline("$devpath/idProduct"), | |
265 | }; | |
266 | ||
267 | if ($level) { | |
268 | my $usbpath = $devpath; | |
269 | $usbpath =~ s|^.*/\d+\-||; | |
270 | $d->{usbpath} = $usbpath; | |
271 | } | |
272 | ||
273 | my $product = file_read_firstline("$devpath/product"); | |
274 | $d->{product} = $product if $product; | |
275 | ||
276 | my $manu = file_read_firstline("$devpath/manufacturer"); | |
277 | $d->{manufacturer} = $manu if $manu; | |
278 | ||
279 | my $serial => file_read_firstline("$devpath/serial"); | |
280 | $d->{serial} = $serial if $serial; | |
281 | ||
282 | push @$res, $d; | |
283 | ||
284 | foreach my $subdev (<$devpath/$busnum-*>) { | |
285 | next if $subdev !~ m|/$busnum-[0-9]+(\.[0-9]+)*$|; | |
286 | __scan_usb_device($res, $subdev, $devnum, $level + 1); | |
287 | } | |
288 | ||
289 | }; | |
290 | ||
291 | sub scan_usb { | |
292 | ||
293 | my $devlist = []; | |
294 | ||
295 | foreach my $device (</sys/bus/usb/devices/usb*>) { | |
296 | __scan_usb_device($devlist, $device, 0, 0); | |
297 | } | |
298 | ||
299 | return $devlist; | |
300 | } | |
301 | ||
f0765c71 | 302 | 1; |