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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 | 12 | |
a70972cd DC |
13 | my $parse_pci_ids = sub { |
14 | my $ids = {}; | |
15 | ||
16 | open(my $fh, '<', "/usr/share/misc/pci.ids") | |
17 | or return $ids; | |
18 | ||
19 | my $curvendor; | |
20 | my $curdevice; | |
21 | while (my $line = <$fh>) { | |
22 | if ($line =~ m/^([0-9a-fA-F]{4})\s+(.*)$/) { | |
23 | $curvendor = ($ids->{"0x$1"} = {}); | |
24 | $curvendor->{name} = $2; | |
25 | } elsif ($line =~ m/^\t([0-9a-fA-F]{4})\s+(.*)$/) { | |
26 | $curdevice = ($curvendor->{devices}->{"0x$1"} = {}); | |
27 | $curdevice->{name} = $2; | |
28 | } elsif ($line =~ m/^\t\t([0-9a-fA-F]{4}) ([0-9a-fA-F]{4})\s+(.*)$/) { | |
29 | $curdevice->{subs}->{"0x$1"}->{"0x$2"} = $3; | |
30 | } | |
31 | } | |
f0765c71 | 32 | |
a70972cd DC |
33 | return $ids; |
34 | }; | |
f0765c71 | 35 | |
a70972cd DC |
36 | # returns a list of pci devices |
37 | # | |
38 | # filter is either a string (then it tries to match to the id) | |
39 | # or a sub ref (then it adds the device if the sub returns truthy) | |
40 | # | |
41 | # verbose also returns iommu groups, subvendor/device and the | |
42 | # human readable names from /usr/share/misc/pci.ids | |
43 | sub lspci { | |
44 | my ($filter, $verbose) = @_; | |
b5dacd10 | 45 | |
a70972cd DC |
46 | my $devices = []; |
47 | my $ids = {}; | |
48 | if ($verbose) { | |
49 | $ids = $parse_pci_ids->(); | |
50 | } | |
b5dacd10 | 51 | |
a70972cd DC |
52 | dir_glob_foreach("$pcisysfs/devices", $pciregex, sub { |
53 | my ($fullid, $domain, $bus, $slot, $function) = @_; | |
54 | my $id = "$bus:$slot.$function"; | |
55 | ||
56 | if (defined($filter) && !ref($filter) && $id !~ m/^\Q$filter\E/) { | |
57 | return; # filter ids early | |
58 | } | |
59 | ||
60 | my $devdir = "$pcisysfs/devices/$fullid"; | |
61 | ||
62 | my $vendor = file_read_firstline("$devdir/vendor"); | |
63 | my $device = file_read_firstline("$devdir/device"); | |
64 | my $class = file_read_firstline("$devdir/class"); | |
65 | ||
66 | my $res = { | |
67 | id => $id, | |
68 | vendor => $vendor, | |
69 | device => $device, | |
70 | class => $class, | |
71 | }; | |
72 | ||
73 | if (defined($filter) && ref($filter) eq 'CODE' && !$filter->($res)) { | |
74 | return; | |
75 | } | |
76 | ||
77 | if ($verbose) { | |
78 | $res->{iommugroup} = -1; | |
79 | if (-e "$devdir/iommu_group") { | |
80 | my ($iommugroup) = (readlink("$devdir/iommu_group") =~ m/\/(\d+)$/); | |
81 | $res->{iommugroup} = int($iommugroup); | |
82 | } | |
83 | ||
84 | if (-d "$devdir/mdev_supported_types") { | |
85 | $res->{mdev} = 1; | |
86 | } | |
87 | ||
88 | my $device_hash = $ids->{$vendor}->{devices}->{$device} // {}; | |
89 | ||
90 | my $sub_vendor = file_read_firstline("$devdir/subsystem_vendor"); | |
91 | my $sub_device = file_read_firstline("$devdir/subsystem_device"); | |
92 | ||
93 | my $vendor_name = $ids->{$vendor}->{name}; | |
94 | my $device_name = $device_hash->{name}; | |
95 | my $sub_vendor_name = $ids->{$sub_vendor}->{name}; | |
96 | my $sub_device_name = $device_hash->{subs}->{$sub_vendor}->{$sub_device}; | |
97 | ||
98 | $res->{vendor_name} = $vendor_name if defined($vendor_name); | |
99 | $res->{device_name} = $device_name if defined($device_name); | |
100 | $res->{subsystem_vendor} = $sub_vendor if defined($sub_vendor); | |
101 | $res->{subsystem_device} = $sub_device if defined($sub_device); | |
102 | $res->{subsystem_vendor_name} = $sub_vendor_name if defined($sub_vendor_name); | |
103 | $res->{subsystem_device_name} = $sub_device_name if defined($sub_device_name); | |
104 | } | |
105 | ||
106 | push @$devices, $res; | |
f0765c71 DC |
107 | }); |
108 | ||
a70972cd DC |
109 | # Entries should be sorted by ids |
110 | $devices = [ sort { $a->{id} cmp $b->{id} } @$devices ]; | |
f0765c71 DC |
111 | |
112 | return $devices; | |
113 | } | |
114 | ||
44a4db5b DC |
115 | sub get_mdev_types { |
116 | my ($id) = @_; | |
117 | ||
118 | my $fullid = $id; | |
119 | if ($id !~ m/^[0-9a-fA-f]{4}:/) { | |
120 | $fullid = "0000:$id"; | |
121 | } | |
122 | ||
123 | my $types = []; | |
124 | ||
125 | my $mdev_path = "$pcisysfs/devices/$fullid/mdev_supported_types"; | |
126 | if (!-d $mdev_path) { | |
127 | return $types; | |
128 | } | |
129 | ||
130 | dir_glob_foreach($mdev_path, '[^\.].*', sub { | |
131 | my ($type) = @_; | |
132 | ||
133 | my $type_path = "$mdev_path/$type"; | |
134 | ||
135 | my $available = int(file_read_firstline("$type_path/available_instances")); | |
136 | my $description = PVE::Tools::file_get_contents("$type_path/description"); | |
137 | ||
138 | push @$types, { | |
139 | type => $type, | |
140 | description => $description, | |
141 | available => $available, | |
142 | }; | |
143 | }); | |
144 | ||
145 | return $types; | |
146 | } | |
147 | ||
f0765c71 | 148 | sub check_iommu_support{ |
63075acb | 149 | # we have IOMMU support if /sys/class/iommu/ is populated |
a923104f | 150 | return PVE::Tools::dir_glob_regex('/sys/class/iommu/', "[^\.].*"); |
f0765c71 DC |
151 | } |
152 | ||
153 | sub file_write { | |
154 | my ($filename, $buf) = @_; | |
155 | ||
156 | my $fh = IO::File->new($filename, "w"); | |
157 | return undef if !$fh; | |
158 | ||
159 | my $res = print $fh $buf; | |
160 | ||
161 | $fh->close(); | |
162 | ||
163 | return $res; | |
164 | } | |
165 | ||
166 | sub pci_device_info { | |
167 | my ($name) = @_; | |
168 | ||
169 | my $res; | |
170 | ||
bf94e590 | 171 | return undef if $name !~ m/^${pciregex}$/; |
f0765c71 DC |
172 | my ($domain, $bus, $slot, $func) = ($1, $2, $3, $4); |
173 | ||
174 | my $irq = file_read_firstline("$pcisysfs/devices/$name/irq"); | |
175 | return undef if !defined($irq) || $irq !~ m/^\d+$/; | |
176 | ||
177 | my $vendor = file_read_firstline("$pcisysfs/devices/$name/vendor"); | |
178 | return undef if !defined($vendor) || $vendor !~ s/^0x//; | |
179 | ||
180 | my $product = file_read_firstline("$pcisysfs/devices/$name/device"); | |
181 | return undef if !defined($product) || $product !~ s/^0x//; | |
182 | ||
183 | $res = { | |
184 | name => $name, | |
185 | vendor => $vendor, | |
186 | product => $product, | |
187 | domain => $domain, | |
188 | bus => $bus, | |
189 | slot => $slot, | |
190 | func => $func, | |
191 | irq => $irq, | |
192 | has_fl_reset => -f "$pcisysfs/devices/$name/reset" || 0, | |
193 | }; | |
194 | ||
195 | return $res; | |
196 | } | |
197 | ||
198 | sub pci_dev_reset { | |
199 | my ($dev) = @_; | |
200 | ||
201 | my $name = $dev->{name}; | |
202 | ||
203 | my $fn = "$pcisysfs/devices/$name/reset"; | |
204 | ||
205 | return file_write($fn, "1"); | |
206 | } | |
207 | ||
208 | sub pci_dev_bind_to_vfio { | |
209 | my ($dev) = @_; | |
210 | ||
211 | my $name = $dev->{name}; | |
212 | ||
213 | my $vfio_basedir = "$pcisysfs/drivers/vfio-pci"; | |
214 | ||
215 | if (!-d $vfio_basedir) { | |
216 | system("/sbin/modprobe vfio-pci >/dev/null 2>/dev/null"); | |
217 | } | |
218 | die "Cannot find vfio-pci module!\n" if !-d $vfio_basedir; | |
219 | ||
220 | my $testdir = "$vfio_basedir/$name"; | |
221 | return 1 if -d $testdir; | |
222 | ||
223 | my $data = "$dev->{vendor} $dev->{product}"; | |
224 | return undef if !file_write("$vfio_basedir/new_id", $data); | |
225 | ||
226 | my $fn = "$pcisysfs/devices/$name/driver/unbind"; | |
227 | if (!file_write($fn, $name)) { | |
228 | return undef if -f $fn; | |
229 | } | |
230 | ||
231 | $fn = "$vfio_basedir/bind"; | |
232 | if (! -d $testdir) { | |
233 | return undef if !file_write($fn, $name); | |
234 | } | |
235 | ||
236 | return -d $testdir; | |
237 | } | |
238 | ||
239 | sub pci_dev_group_bind_to_vfio { | |
240 | my ($pciid) = @_; | |
241 | ||
242 | my $vfio_basedir = "$pcisysfs/drivers/vfio-pci"; | |
243 | ||
244 | if (!-d $vfio_basedir) { | |
245 | system("/sbin/modprobe vfio-pci >/dev/null 2>/dev/null"); | |
246 | } | |
247 | die "Cannot find vfio-pci module!\n" if !-d $vfio_basedir; | |
248 | ||
249 | # get IOMMU group devices | |
250 | opendir(my $D, "$pcisysfs/devices/0000:$pciid/iommu_group/devices/") || die "Cannot open iommu_group: $!\n"; | |
251 | my @devs = grep /^0000:/, readdir($D); | |
252 | closedir($D); | |
253 | ||
254 | foreach my $pciid (@devs) { | |
255 | $pciid =~ m/^([:\.\da-f]+)$/ or die "PCI ID $pciid not valid!\n"; | |
256 | ||
257 | # pci bridges, switches or root ports are not supported | |
258 | # they have a pci_bus subdirectory so skip them | |
259 | next if (-e "$pcisysfs/devices/$pciid/pci_bus"); | |
260 | ||
261 | my $info = pci_device_info($1); | |
262 | pci_dev_bind_to_vfio($info) || die "Cannot bind $pciid to vfio\n"; | |
263 | } | |
264 | ||
265 | return 1; | |
266 | } | |
267 | ||
44a4db5b DC |
268 | sub pci_create_mdev_device { |
269 | my ($pciid, $uuid, $type) = @_; | |
270 | ||
271 | my $basedir = "$pcisysfs/devices/0000:$pciid"; | |
272 | my $mdev_dir = "$basedir/mdev_supported_types"; | |
273 | ||
274 | die "pci device '$pciid' does not support mediated devices \n" | |
275 | if !-d $mdev_dir; | |
276 | ||
277 | die "pci device '$pciid' has no type '$type'\n" | |
278 | if !-d "$mdev_dir/$type"; | |
279 | ||
280 | if (-d "$basedir/$uuid") { | |
281 | # it already exists, checking type | |
282 | my $typelink = readlink("$basedir/$uuid/mdev_type"); | |
283 | my ($existingtype) = $typelink =~ m|/([^/]+)$|; | |
284 | die "mdev instance '$uuid' already exits, but type is not '$type'\n" | |
285 | if $type ne $existingtype; | |
286 | ||
287 | # instance exists, so use it but warn the user | |
288 | warn "mdev instance '$uuid' already existed, using it.\n"; | |
289 | return undef; | |
290 | } | |
291 | ||
292 | my $instances = file_read_firstline("$mdev_dir/$type/available_instances"); | |
293 | my ($avail) = $instances =~ m/^(\d+)$/; | |
294 | die "pci device '$pciid' has no available instances of '$type'\n" | |
295 | if $avail < 1; | |
296 | ||
297 | die "could not create 'type' for pci devices '$pciid'\n" | |
298 | if !file_write("$mdev_dir/$type/create", $uuid); | |
299 | ||
300 | return undef; | |
301 | } | |
302 | ||
303 | sub pci_cleanup_mdev_device { | |
304 | my ($pciid, $uuid) = @_; | |
305 | ||
306 | my $basedir = "$pcisysfs/devices/0000:$pciid/$uuid"; | |
307 | ||
308 | if (! -e $basedir) { | |
309 | return 1; # no cleanup necessary if it does not exist | |
310 | } | |
311 | ||
312 | return file_write("$basedir/remove", "1"); | |
313 | } | |
314 | ||
315 | # encode the hostpci index and vmid into the uuid | |
316 | sub generate_mdev_uuid { | |
317 | my ($vmid, $index) = @_; | |
318 | ||
319 | my $string = sprintf("%08d-0000-0000-0000-%012d", $index, $vmid); | |
320 | ||
321 | return $string; | |
322 | } | |
323 | ||
6eb61ecd DC |
324 | # idea is from usbutils package (/usr/bin/usb-devices) script |
325 | sub __scan_usb_device { | |
326 | my ($res, $devpath, $parent, $level) = @_; | |
327 | ||
328 | return if ! -d $devpath; | |
329 | return if $level && $devpath !~ m/^.*[-.](\d+)$/; | |
330 | my $port = $level ? int($1 - 1) : 0; | |
331 | ||
332 | my $busnum = int(file_read_firstline("$devpath/busnum")); | |
333 | my $devnum = int(file_read_firstline("$devpath/devnum")); | |
334 | ||
335 | my $d = { | |
336 | port => $port, | |
337 | level => $level, | |
338 | busnum => $busnum, | |
339 | devnum => $devnum, | |
340 | speed => file_read_firstline("$devpath/speed"), | |
341 | class => hex(file_read_firstline("$devpath/bDeviceClass")), | |
342 | vendid => file_read_firstline("$devpath/idVendor"), | |
343 | prodid => file_read_firstline("$devpath/idProduct"), | |
344 | }; | |
345 | ||
346 | if ($level) { | |
347 | my $usbpath = $devpath; | |
348 | $usbpath =~ s|^.*/\d+\-||; | |
349 | $d->{usbpath} = $usbpath; | |
350 | } | |
351 | ||
352 | my $product = file_read_firstline("$devpath/product"); | |
353 | $d->{product} = $product if $product; | |
354 | ||
355 | my $manu = file_read_firstline("$devpath/manufacturer"); | |
356 | $d->{manufacturer} = $manu if $manu; | |
357 | ||
358 | my $serial => file_read_firstline("$devpath/serial"); | |
359 | $d->{serial} = $serial if $serial; | |
360 | ||
361 | push @$res, $d; | |
362 | ||
363 | foreach my $subdev (<$devpath/$busnum-*>) { | |
364 | next if $subdev !~ m|/$busnum-[0-9]+(\.[0-9]+)*$|; | |
365 | __scan_usb_device($res, $subdev, $devnum, $level + 1); | |
366 | } | |
367 | ||
368 | }; | |
369 | ||
370 | sub scan_usb { | |
371 | ||
372 | my $devlist = []; | |
373 | ||
374 | foreach my $device (</sys/bus/usb/devices/usb*>) { | |
375 | __scan_usb_device($devlist, $device, 0, 0); | |
376 | } | |
377 | ||
378 | return $devlist; | |
379 | } | |
380 | ||
f0765c71 | 381 | 1; |