2 # SPDX-License-Identifier: BSD-3-Clause
3 # Copyright(c) 2016 Neil Horman <nhorman@tuxdriver.com>
5 # -------------------------------------------------------------------------
7 # Utility to dump PMD_INFO_STRING support from an object file
9 # -------------------------------------------------------------------------
10 from __future__ import print_function
11 from __future__ import unicode_literals
18 from elftools.common.exceptions import ELFError
19 from elftools.common.py3compat import byte2int
20 from elftools.elf.elffile import ELFFile
21 from optparse import OptionParser
23 # For running from development directory. It should take precedence over the
24 # installed pyelftools.
25 sys.path.insert(0, '.')
30 # ===========================================
35 Class for vendors. This is the top level class
36 for the devices belong to a specific vendor.
37 self.devices is the device dictionary
38 subdevices are in each device.
41 def __init__(self, vendorStr):
43 Class initializes with the raw line from pci.ids
44 Parsing takes place inside __init__
46 self.ID = vendorStr.split()[0]
47 self.name = vendorStr.replace("%s " % self.ID, "").rstrip()
50 def addDevice(self, deviceStr):
52 Adds a device to self.devices
53 takes the raw line from pci.ids
57 if devID in self.devices:
60 self.devices[devID] = Device(deviceStr)
63 print(self.ID, self.name)
64 for id, dev in self.devices.items():
67 def find_device(self, devid):
68 # convert to a hex string and remove 0x
69 devid = hex(devid)[2:]
71 return self.devices[devid]
73 return Device("%s Unknown Device" % devid)
78 def __init__(self, deviceStr):
80 Class for each device.
81 Each vendor has its own devices dictionary.
84 self.ID = s.split()[0]
85 self.name = s.replace("%s " % self.ID, "")
89 print("\t%s\t%s" % (self.ID, self.name))
90 for subID, subdev in self.subdevices.items():
93 def addSubDevice(self, subDeviceStr):
95 Adds a subvendor, subdevice to device.
96 Uses raw line from pci.ids
98 s = subDeviceStr.strip()
102 subDeviceName = s.split(" ")[-1]
103 devID = "%s:%s" % (subVendorID, subDeviceID)
104 self.subdevices[devID] = SubDevice(
105 subVendorID, subDeviceID, subDeviceName)
107 def find_subid(self, subven, subdev):
108 subven = hex(subven)[2:]
109 subdev = hex(subdev)[2:]
110 devid = "%s:%s" % (subven, subdev)
113 return self.subdevices[devid]
115 if (subven == "ffff" and subdev == "ffff"):
116 return SubDevice("ffff", "ffff", "(All Subdevices)")
118 return SubDevice(subven, subdev, "(Unknown Subdevice)")
123 Class for subdevices.
126 def __init__(self, vendor, device, name):
128 Class initializes with vendorid, deviceid and name
130 self.vendorID = vendor
131 self.deviceID = device
135 print("\t\t%s\t%s\t%s" % (self.vendorID, self.deviceID, self.name))
140 Top class for all pci.ids entries.
141 All queries will be asked to this class.
142 PCIIds.vendors["0e11"].devices["0046"].\
143 subdevices["0e11:4091"].name = "Smart Array 6i"
146 def __init__(self, filename):
148 Prepares the directories.
149 Checks local data file.
150 Tries to load from local, if not found, downloads from web
156 self.readLocal(filename)
159 def reportVendors(self):
160 """Reports the vendors
162 for vid, v in self.vendors.items():
165 def report(self, vendor=None):
167 Reports everything for all vendors or a specific vendor
168 PCIIds.report() reports everything
169 PCIIDs.report("0e11") reports only "Compaq Computer Corporation"
171 if vendor is not None:
172 self.vendors[vendor].report()
174 for vID, v in self.vendors.items():
177 def find_vendor(self, vid):
178 # convert vid to a hex string and remove the 0x
182 return self.vendors[vid]
184 return Vendor("%s Unknown Vendor" % (vid))
186 def findDate(self, content):
188 if l.find("Date:") > -1:
189 return l.split()[-2].replace("-", "")
193 if len(self.contents) < 1:
194 print("data/%s-pci.ids not found" % self.date)
198 for l in self.contents:
201 elif len(l.strip()) == 0:
204 if l.find("\t\t") == 0:
205 self.vendors[vendorID].devices[
206 deviceID].addSubDevice(l)
207 elif l.find("\t") == 0:
208 deviceID = l.strip().split()[0]
209 self.vendors[vendorID].addDevice(l)
211 vendorID = l.split()[0]
212 self.vendors[vendorID] = Vendor(l)
214 def readLocal(self, filename):
218 with io.open(filename, 'r', encoding='utf-8') as f:
219 self.contents = f.readlines()
220 self.date = self.findDate(self.contents)
224 Loads database from local. If there is no file,
225 it creates a new one from web
227 self.date = idsfile[0].split("/")[1].split("-")[0]
231 # =======================================
233 def search_file(filename, search_path):
234 """ Given a search path, find file with requested name """
235 for path in string.split(search_path, ":"):
236 candidate = os.path.join(path, filename)
237 if os.path.exists(candidate):
238 return os.path.abspath(candidate)
242 class ReadElf(object):
243 """ display_* methods are used to emit output into the output stream
246 def __init__(self, file, output):
248 stream object with the ELF file to read
251 output stream to write to
253 self.elffile = ELFFile(file)
256 # Lazily initialized if a debug dump is requested
257 self._dwarfinfo = None
259 self._versioninfo = None
261 def _section_from_spec(self, spec):
262 """ Retrieve a section given a "spec" (either number or name).
263 Return None if no such section exists in the file.
267 if num < self.elffile.num_sections():
268 return self.elffile.get_section(num)
272 # Not a number. Must be a name then
273 section = self.elffile.get_section_by_name(force_unicode(spec))
275 # No match with a unicode name.
276 # Some versions of pyelftools (<= 0.23) store internal strings
277 # as bytes. Try again with the name encoded as bytes.
278 section = self.elffile.get_section_by_name(force_bytes(spec))
281 def pretty_print_pmdinfo(self, pmdinfo):
284 for i in pmdinfo["pci_ids"]:
285 vendor = pcidb.find_vendor(i[0])
286 device = vendor.find_device(i[1])
287 subdev = device.find_subid(i[2], i[3])
288 print("%s (%s) : %s (%s) %s" %
289 (vendor.name, vendor.ID, device.name,
290 device.ID, subdev.name))
292 def parse_pmd_info_string(self, mystring):
296 optional_pmd_info = [
297 {'id': 'params', 'tag': 'PMD PARAMETERS'},
298 {'id': 'kmod', 'tag': 'PMD KMOD DEPENDENCIES'}
301 i = mystring.index("=")
302 mystring = mystring[i + 2:]
303 pmdinfo = json.loads(mystring)
306 print(json.dumps(pmdinfo))
309 print("PMD NAME: " + pmdinfo["name"])
310 for i in optional_pmd_info:
312 print("%s: %s" % (i['tag'], pmdinfo[i['id']]))
316 if (len(pmdinfo["pci_ids"]) != 0):
317 print("PMD HW SUPPORT:")
318 if pcidb is not None:
319 self.pretty_print_pmdinfo(pmdinfo)
321 print("VENDOR\t DEVICE\t SUBVENDOR\t SUBDEVICE")
322 for i in pmdinfo["pci_ids"]:
323 print("0x%04x\t 0x%04x\t 0x%04x\t\t 0x%04x" %
324 (i[0], i[1], i[2], i[3]))
328 def display_pmd_info_strings(self, section_spec):
329 """ Display a strings dump of a section. section_spec is either a
330 section number or a name.
332 section = self._section_from_spec(section_spec)
336 data = section.data()
339 while dataptr < len(data):
340 while (dataptr < len(data) and
341 not (32 <= byte2int(data[dataptr]) <= 127)):
344 if dataptr >= len(data):
348 while endptr < len(data) and byte2int(data[endptr]) != 0:
351 # pyelftools may return byte-strings, force decode them
352 mystring = force_unicode(data[dataptr:endptr])
353 rc = mystring.find("PMD_INFO_STRING")
355 self.parse_pmd_info_string(mystring)
359 def find_librte_eal(self, section):
360 for tag in section.iter_tags():
361 # pyelftools may return byte-strings, force decode them
362 if force_unicode(tag.entry.d_tag) == 'DT_NEEDED':
363 if "librte_eal" in force_unicode(tag.needed):
364 return force_unicode(tag.needed)
367 def search_for_autoload_path(self):
372 section = self._section_from_spec(".dynamic")
374 eallib = self.find_librte_eal(section)
375 if eallib is not None:
376 ldlibpath = os.environ.get('LD_LIBRARY_PATH')
377 if ldlibpath is None:
379 dtr = self.get_dt_runpath(section)
380 library = search_file(eallib,
381 dtr + ":" + ldlibpath +
382 ":/usr/lib64:/lib64:/usr/lib:/lib")
385 if raw_output is False:
386 print("Scanning for autoload path in %s" % library)
387 scanfile = io.open(library, 'rb')
388 scanelf = ReadElf(scanfile, sys.stdout)
389 except AttributeError:
390 # Not a dynamic binary
396 section = scanelf._section_from_spec(".rodata")
398 if scanfile is not None:
402 data = section.data()
405 while dataptr < len(data):
406 while (dataptr < len(data) and
407 not (32 <= byte2int(data[dataptr]) <= 127)):
410 if dataptr >= len(data):
414 while endptr < len(data) and byte2int(data[endptr]) != 0:
417 # pyelftools may return byte-strings, force decode them
418 mystring = force_unicode(data[dataptr:endptr])
419 rc = mystring.find("DPDK_PLUGIN_PATH")
421 rc = mystring.find("=")
422 return (mystring[rc + 1:], library)
425 if scanfile is not None:
429 def get_dt_runpath(self, dynsec):
430 for tag in dynsec.iter_tags():
431 # pyelftools may return byte-strings, force decode them
432 if force_unicode(tag.entry.d_tag) == 'DT_RUNPATH':
433 return force_unicode(tag.runpath)
436 def process_dt_needed_entries(self):
437 """ Look to see if there are any DT_NEEDED entries in the binary
438 And process those if there are
442 ldlibpath = os.environ.get('LD_LIBRARY_PATH')
443 if ldlibpath is None:
446 dynsec = self._section_from_spec(".dynamic")
448 runpath = self.get_dt_runpath(dynsec)
449 except AttributeError:
450 # dynsec is None, just return
453 for tag in dynsec.iter_tags():
454 # pyelftools may return byte-strings, force decode them
455 if force_unicode(tag.entry.d_tag) == 'DT_NEEDED':
456 if 'librte_pmd' in force_unicode(tag.needed):
457 library = search_file(force_unicode(tag.needed),
458 runpath + ":" + ldlibpath +
459 ":/usr/lib64:/lib64:/usr/lib:/lib")
460 if library is not None:
461 if raw_output is False:
462 print("Scanning %s for pmd information" % library)
463 with io.open(library, 'rb') as file:
465 libelf = ReadElf(file, sys.stdout)
467 print("%s is no an ELF file" % library)
469 libelf.process_dt_needed_entries()
470 libelf.display_pmd_info_strings(".rodata")
474 # compat: remove force_unicode & force_bytes when pyelftools<=0.23 support is
476 def force_unicode(s):
477 if hasattr(s, 'decode') and callable(s.decode):
478 s = s.decode('latin-1') # same encoding used in pyelftools py3compat
483 if hasattr(s, 'encode') and callable(s.encode):
484 s = s.encode('latin-1') # same encoding used in pyelftools py3compat
488 def scan_autoload_path(autoload_path):
491 if os.path.exists(autoload_path) is False:
495 dirs = os.listdir(autoload_path)
497 # Couldn't read the directory, give up
501 dpath = os.path.join(autoload_path, d)
502 if os.path.isdir(dpath):
503 scan_autoload_path(dpath)
504 if os.path.isfile(dpath):
506 file = io.open(dpath, 'rb')
507 readelf = ReadElf(file, sys.stdout)
509 # this is likely not an elf file, skip it
512 # No permission to read the file, skip it
515 if raw_output is False:
516 print("Hw Support for library %s" % d)
517 readelf.display_pmd_info_strings(".rodata")
521 def scan_for_autoload_pmds(dpdk_path):
523 search the specified application or path for a pmd autoload path
524 then scan said path for pmds and report hw support
528 if (os.path.isfile(dpdk_path) is False):
529 if raw_output is False:
530 print("Must specify a file name")
533 file = io.open(dpdk_path, 'rb')
535 readelf = ReadElf(file, sys.stdout)
537 if raw_output is False:
538 print("Unable to parse %s" % file)
541 (autoload_path, scannedfile) = readelf.search_for_autoload_path()
542 if not autoload_path:
543 if (raw_output is False):
544 print("No autoload path configured in %s" % dpdk_path)
546 if (raw_output is False):
547 if (scannedfile is None):
548 scannedfile = dpdk_path
549 print("Found autoload path %s in %s" % (autoload_path, scannedfile))
552 if (raw_output is False):
553 print("Discovered Autoload HW Support:")
554 scan_autoload_path(autoload_path)
558 def main(stream=None):
562 pcifile_default = "./pci.ids" # For unknown OS's assume local file
563 if platform.system() == 'Linux':
564 # hwdata is the legacy location, misc is supported going forward
565 pcifile_default = "/usr/share/misc/pci.ids"
566 if not os.path.exists(pcifile_default):
567 pcifile_default = "/usr/share/hwdata/pci.ids"
568 elif platform.system() == 'FreeBSD':
569 pcifile_default = "/usr/local/share/pciids/pci.ids"
570 if not os.path.exists(pcifile_default):
571 pcifile_default = "/usr/share/misc/pci_vendors"
573 optparser = OptionParser(
574 usage='usage: %prog [-hrtp] [-d <pci id file] <elf-file>',
575 description="Dump pmd hardware support info",
576 add_help_option=True)
577 optparser.add_option('-r', '--raw',
578 action='store_true', dest='raw_output',
579 help='Dump raw json strings')
580 optparser.add_option("-d", "--pcidb", dest="pcifile",
581 help="specify a pci database "
582 "to get vendor names from",
583 default=pcifile_default, metavar="FILE")
584 optparser.add_option("-t", "--table", dest="tblout",
585 help="output information on hw support as a "
588 optparser.add_option("-p", "--plugindir", dest="pdir",
589 help="scan dpdk for autoload plugins",
592 options, args = optparser.parse_args()
594 if options.raw_output:
598 pcidb = PCIIds(options.pcifile)
600 print("Pci DB file not found")
604 options.pcifile = None
608 optparser.print_usage()
611 if options.pdir is True:
612 exit(scan_for_autoload_pmds(args[0]))
614 ldlibpath = os.environ.get('LD_LIBRARY_PATH')
615 if (ldlibpath is None):
618 if (os.path.exists(args[0]) is True):
621 myelffile = search_file(
622 args[0], ldlibpath + ":/usr/lib64:/lib64:/usr/lib:/lib")
624 if (myelffile is None):
625 print("File not found")
628 with io.open(myelffile, 'rb') as file:
630 readelf = ReadElf(file, sys.stdout)
631 readelf.process_dt_needed_entries()
632 readelf.display_pmd_info_strings(".rodata")
635 except ELFError as ex:
636 sys.stderr.write('ELF error: %s\n' % ex)
640 # -------------------------------------------------------------------------
641 if __name__ == '__main__':