summaryrefslogtreecommitdiffstats
path: root/src/seastar/dpdk/usertools/dpdk-pmdinfo.py
blob: 46c1be081b9047b50d533fcc9189eccfa84841ad (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
#!/usr/bin/env python

# -------------------------------------------------------------------------
#
# Utility to dump PMD_INFO_STRING support from an object file
#
# -------------------------------------------------------------------------
from __future__ import print_function
import json
import os
import platform
import string
import sys
from elftools.common.exceptions import ELFError
from elftools.common.py3compat import (byte2int, bytes2str, str2bytes)
from elftools.elf.elffile import ELFFile
from optparse import OptionParser

# For running from development directory. It should take precedence over the
# installed pyelftools.
sys.path.insert(0, '.')

raw_output = False
pcidb = None

# ===========================================


class Vendor:
    """
    Class for vendors. This is the top level class
    for the devices belong to a specific vendor.
    self.devices is the device dictionary
    subdevices are in each device.
    """

    def __init__(self, vendorStr):
        """
        Class initializes with the raw line from pci.ids
        Parsing takes place inside __init__
        """
        self.ID = vendorStr.split()[0]
        self.name = vendorStr.replace("%s " % self.ID, "").rstrip()
        self.devices = {}

    def addDevice(self, deviceStr):
        """
        Adds a device to self.devices
        takes the raw line from pci.ids
        """
        s = deviceStr.strip()
        devID = s.split()[0]
        if devID in self.devices:
            pass
        else:
            self.devices[devID] = Device(deviceStr)

    def report(self):
        print(self.ID, self.name)
        for id, dev in self.devices.items():
            dev.report()

    def find_device(self, devid):
        # convert to a hex string and remove 0x
        devid = hex(devid)[2:]
        try:
            return self.devices[devid]
        except:
            return Device("%s  Unknown Device" % devid)


class Device:

    def __init__(self, deviceStr):
        """
        Class for each device.
        Each vendor has its own devices dictionary.
        """
        s = deviceStr.strip()
        self.ID = s.split()[0]
        self.name = s.replace("%s  " % self.ID, "")
        self.subdevices = {}

    def report(self):
        print("\t%s\t%s" % (self.ID, self.name))
        for subID, subdev in self.subdevices.items():
            subdev.report()

    def addSubDevice(self, subDeviceStr):
        """
        Adds a subvendor, subdevice to device.
        Uses raw line from pci.ids
        """
        s = subDeviceStr.strip()
        spl = s.split()
        subVendorID = spl[0]
        subDeviceID = spl[1]
        subDeviceName = s.split("  ")[-1]
        devID = "%s:%s" % (subVendorID, subDeviceID)
        self.subdevices[devID] = SubDevice(
            subVendorID, subDeviceID, subDeviceName)

    def find_subid(self, subven, subdev):
        subven = hex(subven)[2:]
        subdev = hex(subdev)[2:]
        devid = "%s:%s" % (subven, subdev)

        try:
            return self.subdevices[devid]
        except:
            if (subven == "ffff" and subdev == "ffff"):
                return SubDevice("ffff", "ffff", "(All Subdevices)")
            else:
                return SubDevice(subven, subdev, "(Unknown Subdevice)")


class SubDevice:
    """
    Class for subdevices.
    """

    def __init__(self, vendor, device, name):
        """
        Class initializes with vendorid, deviceid and name
        """
        self.vendorID = vendor
        self.deviceID = device
        self.name = name

    def report(self):
        print("\t\t%s\t%s\t%s" % (self.vendorID, self.deviceID, self.name))


class PCIIds:
    """
    Top class for all pci.ids entries.
    All queries will be asked to this class.
    PCIIds.vendors["0e11"].devices["0046"].\
    subdevices["0e11:4091"].name  =  "Smart Array 6i"
    """

    def __init__(self, filename):
        """
        Prepares the directories.
        Checks local data file.
        Tries to load from local, if not found, downloads from web
        """
        self.version = ""
        self.date = ""
        self.vendors = {}
        self.contents = None
        self.readLocal(filename)
        self.parse()

    def reportVendors(self):
        """Reports the vendors
        """
        for vid, v in self.vendors.items():
            print(v.ID, v.name)

    def report(self, vendor=None):
        """
        Reports everything for all vendors or a specific vendor
        PCIIds.report()  reports everything
        PCIIDs.report("0e11") reports only "Compaq Computer Corporation"
        """
        if vendor is not None:
            self.vendors[vendor].report()
        else:
            for vID, v in self.vendors.items():
                v.report()

    def find_vendor(self, vid):
        # convert vid to a hex string and remove the 0x
        vid = hex(vid)[2:]

        try:
            return self.vendors[vid]
        except:
            return Vendor("%s Unknown Vendor" % (vid))

    def findDate(self, content):
        for l in content:
            if l.find("Date:") > -1:
                return l.split()[-2].replace("-", "")
        return None

    def parse(self):
        if len(self.contents) < 1:
            print("data/%s-pci.ids not found" % self.date)
        else:
            vendorID = ""
            deviceID = ""
            for l in self.contents:
                if l[0] == "#":
                    continue
                elif len(l.strip()) == 0:
                    continue
                else:
                    if l.find("\t\t") == 0:
                        self.vendors[vendorID].devices[
                            deviceID].addSubDevice(l)
                    elif l.find("\t") == 0:
                        deviceID = l.strip().split()[0]
                        self.vendors[vendorID].addDevice(l)
                    else:
                        vendorID = l.split()[0]
                        self.vendors[vendorID] = Vendor(l)

    def readLocal(self, filename):
        """
        Reads the local file
        """
        self.contents = open(filename).readlines()
        self.date = self.findDate(self.contents)

    def loadLocal(self):
        """
        Loads database from local. If there is no file,
        it creates a new one from web
        """
        self.date = idsfile[0].split("/")[1].split("-")[0]
        self.readLocal()


# =======================================

def search_file(filename, search_path):
    """ Given a search path, find file with requested name """
    for path in string.split(search_path, ":"):
        candidate = os.path.join(path, filename)
        if os.path.exists(candidate):
            return os.path.abspath(candidate)
    return None


class ReadElf(object):
    """ display_* methods are used to emit output into the output stream
    """

    def __init__(self, file, output):
        """ file:
                stream object with the ELF file to read

            output:
                output stream to write to
        """
        self.elffile = ELFFile(file)
        self.output = output

        # Lazily initialized if a debug dump is requested
        self._dwarfinfo = None

        self._versioninfo = None

    def _section_from_spec(self, spec):
        """ Retrieve a section given a "spec" (either number or name).
            Return None if no such section exists in the file.
        """
        try:
            num = int(spec)
            if num < self.elffile.num_sections():
                return self.elffile.get_section(num)
            else:
                return None
        except ValueError:
            # Not a number. Must be a name then
            return self.elffile.get_section_by_name(str2bytes(spec))

    def pretty_print_pmdinfo(self, pmdinfo):
        global pcidb

        for i in pmdinfo["pci_ids"]:
            vendor = pcidb.find_vendor(i[0])
            device = vendor.find_device(i[1])
            subdev = device.find_subid(i[2], i[3])
            print("%s (%s) : %s (%s) %s" %
                  (vendor.name, vendor.ID, device.name,
                   device.ID, subdev.name))

    def parse_pmd_info_string(self, mystring):
        global raw_output
        global pcidb

        optional_pmd_info = [
            {'id': 'params', 'tag': 'PMD PARAMETERS'},
            {'id': 'kmod', 'tag': 'PMD KMOD DEPENDENCIES'}
        ]

        i = mystring.index("=")
        mystring = mystring[i + 2:]
        pmdinfo = json.loads(mystring)

        if raw_output:
            print(json.dumps(pmdinfo))
            return

        print("PMD NAME: " + pmdinfo["name"])
        for i in optional_pmd_info:
            try:
                print("%s: %s" % (i['tag'], pmdinfo[i['id']]))
            except KeyError:
                continue

        if (len(pmdinfo["pci_ids"]) != 0):
            print("PMD HW SUPPORT:")
            if pcidb is not None:
                self.pretty_print_pmdinfo(pmdinfo)
            else:
                print("VENDOR\t DEVICE\t SUBVENDOR\t SUBDEVICE")
                for i in pmdinfo["pci_ids"]:
                    print("0x%04x\t 0x%04x\t 0x%04x\t\t 0x%04x" %
                          (i[0], i[1], i[2], i[3]))

        print("")

    def display_pmd_info_strings(self, section_spec):
        """ Display a strings dump of a section. section_spec is either a
            section number or a name.
        """
        section = self._section_from_spec(section_spec)
        if section is None:
            return

        data = section.data()
        dataptr = 0

        while dataptr < len(data):
            while (dataptr < len(data) and
                    not (32 <= byte2int(data[dataptr]) <= 127)):
                dataptr += 1

            if dataptr >= len(data):
                break

            endptr = dataptr
            while endptr < len(data) and byte2int(data[endptr]) != 0:
                endptr += 1

            mystring = bytes2str(data[dataptr:endptr])
            rc = mystring.find("PMD_INFO_STRING")
            if (rc != -1):
                self.parse_pmd_info_string(mystring)

            dataptr = endptr

    def find_librte_eal(self, section):
        for tag in section.iter_tags():
            if tag.entry.d_tag == 'DT_NEEDED':
                if "librte_eal" in tag.needed:
                    return tag.needed
        return None

    def search_for_autoload_path(self):
        scanelf = self
        scanfile = None
        library = None

        section = self._section_from_spec(".dynamic")
        try:
            eallib = self.find_librte_eal(section)
            if eallib is not None:
                ldlibpath = os.environ.get('LD_LIBRARY_PATH')
                if ldlibpath is None:
                    ldlibpath = ""
                dtr = self.get_dt_runpath(section)
                library = search_file(eallib,
                                      dtr + ":" + ldlibpath +
                                      ":/usr/lib64:/lib64:/usr/lib:/lib")
                if library is None:
                    return (None, None)
                if raw_output is False:
                    print("Scanning for autoload path in %s" % library)
                scanfile = open(library, 'rb')
                scanelf = ReadElf(scanfile, sys.stdout)
        except AttributeError:
            # Not a dynamic binary
            pass
        except ELFError:
            scanfile.close()
            return (None, None)

        section = scanelf._section_from_spec(".rodata")
        if section is None:
            if scanfile is not None:
                scanfile.close()
            return (None, None)

        data = section.data()
        dataptr = 0

        while dataptr < len(data):
            while (dataptr < len(data) and
                    not (32 <= byte2int(data[dataptr]) <= 127)):
                dataptr += 1

            if dataptr >= len(data):
                break

            endptr = dataptr
            while endptr < len(data) and byte2int(data[endptr]) != 0:
                endptr += 1

            mystring = bytes2str(data[dataptr:endptr])
            rc = mystring.find("DPDK_PLUGIN_PATH")
            if (rc != -1):
                rc = mystring.find("=")
                return (mystring[rc + 1:], library)

            dataptr = endptr
        if scanfile is not None:
            scanfile.close()
        return (None, None)

    def get_dt_runpath(self, dynsec):
        for tag in dynsec.iter_tags():
            if tag.entry.d_tag == 'DT_RUNPATH':
                return tag.runpath
        return ""

    def process_dt_needed_entries(self):
        """ Look to see if there are any DT_NEEDED entries in the binary
            And process those if there are
        """
        global raw_output
        runpath = ""
        ldlibpath = os.environ.get('LD_LIBRARY_PATH')
        if ldlibpath is None:
            ldlibpath = ""

        dynsec = self._section_from_spec(".dynamic")
        try:
            runpath = self.get_dt_runpath(dynsec)
        except AttributeError:
            # dynsec is None, just return
            return

        for tag in dynsec.iter_tags():
            if tag.entry.d_tag == 'DT_NEEDED':
                rc = tag.needed.find(b"librte_pmd")
                if (rc != -1):
                    library = search_file(tag.needed,
                                          runpath + ":" + ldlibpath +
                                          ":/usr/lib64:/lib64:/usr/lib:/lib")
                    if library is not None:
                        if raw_output is False:
                            print("Scanning %s for pmd information" % library)
                        with open(library, 'rb') as file:
                            try:
                                libelf = ReadElf(file, sys.stdout)
                            except ELFError:
                                print("%s is no an ELF file" % library)
                                continue
                            libelf.process_dt_needed_entries()
                            libelf.display_pmd_info_strings(".rodata")
                            file.close()


def scan_autoload_path(autoload_path):
    global raw_output

    if os.path.exists(autoload_path) is False:
        return

    try:
        dirs = os.listdir(autoload_path)
    except OSError:
        # Couldn't read the directory, give up
        return

    for d in dirs:
        dpath = os.path.join(autoload_path, d)
        if os.path.isdir(dpath):
            scan_autoload_path(dpath)
        if os.path.isfile(dpath):
            try:
                file = open(dpath, 'rb')
                readelf = ReadElf(file, sys.stdout)
            except ELFError:
                # this is likely not an elf file, skip it
                continue
            except IOError:
                # No permission to read the file, skip it
                continue

            if raw_output is False:
                print("Hw Support for library %s" % d)
            readelf.display_pmd_info_strings(".rodata")
            file.close()


def scan_for_autoload_pmds(dpdk_path):
    """
    search the specified application or path for a pmd autoload path
    then scan said path for pmds and report hw support
    """
    global raw_output

    if (os.path.isfile(dpdk_path) is False):
        if raw_output is False:
            print("Must specify a file name")
        return

    file = open(dpdk_path, 'rb')
    try:
        readelf = ReadElf(file, sys.stdout)
    except ElfError:
        if raw_output is False:
            print("Unable to parse %s" % file)
        return

    (autoload_path, scannedfile) = readelf.search_for_autoload_path()
    if (autoload_path is None or autoload_path is ""):
        if (raw_output is False):
            print("No autoload path configured in %s" % dpdk_path)
        return
    if (raw_output is False):
        if (scannedfile is None):
            scannedfile = dpdk_path
        print("Found autoload path %s in %s" % (autoload_path, scannedfile))

    file.close()
    if (raw_output is False):
        print("Discovered Autoload HW Support:")
    scan_autoload_path(autoload_path)
    return


def main(stream=None):
    global raw_output
    global pcidb

    pcifile_default = "./pci.ids"  # For unknown OS's assume local file
    if platform.system() == 'Linux':
        pcifile_default = "/usr/share/hwdata/pci.ids"
    elif platform.system() == 'FreeBSD':
        pcifile_default = "/usr/local/share/pciids/pci.ids"
        if not os.path.exists(pcifile_default):
            pcifile_default = "/usr/share/misc/pci_vendors"

    optparser = OptionParser(
        usage='usage: %prog [-hrtp] [-d <pci id file] <elf-file>',
        description="Dump pmd hardware support info",
        add_help_option=True)
    optparser.add_option('-r', '--raw',
                         action='store_true', dest='raw_output',
                         help='Dump raw json strings')
    optparser.add_option("-d", "--pcidb", dest="pcifile",
                         help="specify a pci database "
                              "to get vendor names from",
                         default=pcifile_default, metavar="FILE")
    optparser.add_option("-t", "--table", dest="tblout",
                         help="output information on hw support as a "
                              "hex table",
                         action='store_true')
    optparser.add_option("-p", "--plugindir", dest="pdir",
                         help="scan dpdk for autoload plugins",
                         action='store_true')

    options, args = optparser.parse_args()

    if options.raw_output:
        raw_output = True

    if options.pcifile:
        pcidb = PCIIds(options.pcifile)
        if pcidb is None:
            print("Pci DB file not found")
            exit(1)

    if options.tblout:
        options.pcifile = None
        pcidb = None

    if (len(args) == 0):
        optparser.print_usage()
        exit(1)

    if options.pdir is True:
        exit(scan_for_autoload_pmds(args[0]))

    ldlibpath = os.environ.get('LD_LIBRARY_PATH')
    if (ldlibpath is None):
        ldlibpath = ""

    if (os.path.exists(args[0]) is True):
        myelffile = args[0]
    else:
        myelffile = search_file(
            args[0], ldlibpath + ":/usr/lib64:/lib64:/usr/lib:/lib")

    if (myelffile is None):
        print("File not found")
        sys.exit(1)

    with open(myelffile, 'rb') as file:
        try:
            readelf = ReadElf(file, sys.stdout)
            readelf.process_dt_needed_entries()
            readelf.display_pmd_info_strings(".rodata")
            sys.exit(0)

        except ELFError as ex:
            sys.stderr.write('ELF error: %s\n' % ex)
            sys.exit(1)


# -------------------------------------------------------------------------
if __name__ == '__main__':
    main()