2 # SPDX-License-Identifier: BSD-3-Clause
3 # Copyright(c) 2010-2014 Intel Corporation
13 from os.path import exists, basename
14 from os.path import join as path_join
16 # The PCI base class for all devices
17 network_class = {'Class': '02', 'Vendor': None, 'Device': None,
18 'SVendor': None, 'SDevice': None}
19 acceleration_class = {'Class': '12', 'Vendor': None, 'Device': None,
20 'SVendor': None, 'SDevice': None}
21 ifpga_class = {'Class': '12', 'Vendor': '8086', 'Device': '0b30',
22 'SVendor': None, 'SDevice': None}
23 encryption_class = {'Class': '10', 'Vendor': None, 'Device': None,
24 'SVendor': None, 'SDevice': None}
25 intel_processor_class = {'Class': '0b', 'Vendor': '8086', 'Device': None,
26 'SVendor': None, 'SDevice': None}
27 cavium_sso = {'Class': '08', 'Vendor': '177d', 'Device': 'a04b,a04d',
28 'SVendor': None, 'SDevice': None}
29 cavium_fpa = {'Class': '08', 'Vendor': '177d', 'Device': 'a053',
30 'SVendor': None, 'SDevice': None}
31 cavium_pkx = {'Class': '08', 'Vendor': '177d', 'Device': 'a0dd,a049',
32 'SVendor': None, 'SDevice': None}
33 cavium_tim = {'Class': '08', 'Vendor': '177d', 'Device': 'a051',
34 'SVendor': None, 'SDevice': None}
35 cavium_zip = {'Class': '12', 'Vendor': '177d', 'Device': 'a037',
36 'SVendor': None, 'SDevice': None}
37 avp_vnic = {'Class': '05', 'Vendor': '1af4', 'Device': '1110',
38 'SVendor': None, 'SDevice': None}
40 octeontx2_sso = {'Class': '08', 'Vendor': '177d', 'Device': 'a0f9,a0fa',
41 'SVendor': None, 'SDevice': None}
42 octeontx2_npa = {'Class': '08', 'Vendor': '177d', 'Device': 'a0fb,a0fc',
43 'SVendor': None, 'SDevice': None}
44 octeontx2_dma = {'Class': '08', 'Vendor': '177d', 'Device': 'a081',
45 'SVendor': None, 'SDevice': None}
46 octeontx2_ree = {'Class': '08', 'Vendor': '177d', 'Device': 'a0f4',
47 'SVendor': None, 'SDevice': None}
48 cnxk_bphy = {'Class': '08', 'Vendor': '177d', 'Device': 'a089',
49 'SVendor': None, 'SDevice': None}
50 cnxk_bphy_cgx = {'Class': '08', 'Vendor': '177d', 'Device': 'a059,a060',
51 'SVendor': None, 'SDevice': None}
53 intel_dlb = {'Class': '0b', 'Vendor': '8086', 'Device': '270b,2710,2714',
54 'SVendor': None, 'SDevice': None}
55 intel_ioat_bdw = {'Class': '08', 'Vendor': '8086',
56 'Device': '6f20,6f21,6f22,6f23,6f24,6f25,6f26,6f27,6f2e,6f2f',
57 'SVendor': None, 'SDevice': None}
58 intel_ioat_skx = {'Class': '08', 'Vendor': '8086', 'Device': '2021',
59 'SVendor': None, 'SDevice': None}
60 intel_ioat_icx = {'Class': '08', 'Vendor': '8086', 'Device': '0b00',
61 'SVendor': None, 'SDevice': None}
62 intel_idxd_spr = {'Class': '08', 'Vendor': '8086', 'Device': '0b25',
63 'SVendor': None, 'SDevice': None}
64 intel_ntb_skx = {'Class': '06', 'Vendor': '8086', 'Device': '201c',
65 'SVendor': None, 'SDevice': None}
66 intel_ntb_icx = {'Class': '06', 'Vendor': '8086', 'Device': '347e',
67 'SVendor': None, 'SDevice': None}
69 network_devices = [network_class, cavium_pkx, avp_vnic, ifpga_class]
70 baseband_devices = [acceleration_class]
71 crypto_devices = [encryption_class, intel_processor_class]
72 eventdev_devices = [cavium_sso, cavium_tim, intel_dlb, octeontx2_sso]
73 mempool_devices = [cavium_fpa, octeontx2_npa]
74 compress_devices = [cavium_zip]
75 regex_devices = [octeontx2_ree]
76 misc_devices = [cnxk_bphy, cnxk_bphy_cgx, intel_ioat_bdw, intel_ioat_skx, intel_ioat_icx, intel_idxd_spr,
77 intel_ntb_skx, intel_ntb_icx,
80 # global dict ethernet devices present. Dictionary indexed by PCI address.
81 # Each device within this is itself a dictionary of device properties
83 # list of supported DPDK drivers
84 dpdk_drivers = ["igb_uio", "vfio-pci", "uio_pci_generic"]
85 # list of currently loaded kernel modules
88 # command-line arg flags
94 # check if a specific kernel module is loaded
95 def module_is_loaded(module):
98 if module == 'vfio_pci':
102 return module in loaded_modules
104 # Get list of sysfs modules (both built-in and dynamically loaded)
105 sysfs_path = '/sys/module/'
107 # Get the list of directories in sysfs_path
108 sysfs_mods = [m for m in os.listdir(sysfs_path)
109 if os.path.isdir(os.path.join(sysfs_path, m))]
111 # special case for vfio_pci (module is named vfio-pci,
112 # but its .ko is named vfio_pci)
113 sysfs_mods = [a if a != 'vfio_pci' else 'vfio-pci' for a in sysfs_mods]
115 loaded_modules = sysfs_mods
117 # add built-in modules as loaded
118 release = platform.uname().release
119 filename = os.path.join("/lib/modules/", release, "modules.builtin")
120 if os.path.exists(filename):
122 with open(filename) as f:
123 loaded_modules += [os.path.splitext(os.path.basename(mod))[0] for mod in f]
125 print("Warning: cannot read list of built-in kernel modules")
127 return module in loaded_modules
131 '''Checks that igb_uio is loaded'''
134 # list of supported modules
135 mods = [{"Name": driver, "Found": False} for driver in dpdk_drivers]
137 # first check if module is loaded
139 if module_is_loaded(mod["Name"]):
142 # check if we have at least one loaded module
143 if True not in [mod["Found"] for mod in mods] and b_flag is not None:
144 print("Warning: no supported DPDK kernel modules are loaded", file=sys.stderr)
146 # change DPDK driver list to only contain drivers that are loaded
147 dpdk_drivers = [mod["Name"] for mod in mods if mod["Found"]]
150 def has_driver(dev_id):
151 '''return true if a device is assigned to a driver. False otherwise'''
152 return "Driver_str" in devices[dev_id]
155 def get_pci_device_details(dev_id, probe_lspci):
156 '''This function gets additional details for a PCI device'''
160 extra_info = subprocess.check_output(["lspci", "-vmmks", dev_id]).splitlines()
161 # parse lspci details
162 for line in extra_info:
165 name, value = line.decode("utf8").split("\t", 1)
166 name = name.strip(":") + "_str"
168 # check for a unix interface name
169 device["Interface"] = ""
170 for base, dirs, _ in os.walk("/sys/bus/pci/devices/%s/" % dev_id):
172 device["Interface"] = \
173 ",".join(os.listdir(os.path.join(base, "net")))
175 # check if a port is used for ssh connection
176 device["Ssh_if"] = False
177 device["Active"] = ""
182 '''This function clears any old data'''
186 def get_device_details(devices_type):
187 '''This function populates the "devices" dictionary. The keys used are
188 the pci addresses (domain:bus:slot.func). The values are themselves
189 dictionaries - one for each NIC.'''
193 # first loop through and read details for all devices
194 # request machine readable format, with numeric IDs and String
196 dev_lines = subprocess.check_output(["lspci", "-Dvmmnnk"]).splitlines()
197 for dev_line in dev_lines:
199 if device_type_match(dev, devices_type):
200 # Replace "Driver" with "Driver_str" to have consistency of
201 # of dictionary key names
202 if "Driver" in dev.keys():
203 dev["Driver_str"] = dev.pop("Driver")
204 if "Module" in dev.keys():
205 dev["Module_str"] = dev.pop("Module")
206 # use dict to make copy of dev
207 devices[dev["Slot"]] = dict(dev)
208 # Clear previous device's data
211 name, value = dev_line.decode("utf8").split("\t", 1)
212 value_list = value.rsplit(' ', 1)
214 # String stored in <name>_str
215 dev[name.rstrip(":") + '_str'] = value_list[0]
217 dev[name.rstrip(":")] = value_list[len(value_list) - 1] \
218 .rstrip("]").lstrip("[")
220 if devices_type == network_devices:
221 # check what is the interface if any for an ssh connection if
222 # any to this host, so we can mark it later.
224 route = subprocess.check_output(["ip", "-o", "route"])
225 # filter out all lines for 169.254 routes
226 route = "\n".join(filter(lambda ln: not ln.startswith("169.254"),
227 route.decode().splitlines()))
228 rt_info = route.split()
229 for i in range(len(rt_info) - 1):
230 if rt_info[i] == "dev":
231 ssh_if.append(rt_info[i+1])
233 # based on the basic info, get extended text details
234 for d in devices.keys():
235 if not device_type_match(devices[d], devices_type):
238 # get additional info and add it to existing data
239 devices[d] = devices[d].copy()
240 # No need to probe lspci
241 devices[d].update(get_pci_device_details(d, False).items())
243 if devices_type == network_devices:
245 if _if in devices[d]["Interface"].split(","):
246 devices[d]["Ssh_if"] = True
247 devices[d]["Active"] = "*Active*"
250 # add igb_uio to list of supporting modules if needed
251 if "Module_str" in devices[d]:
252 for driver in dpdk_drivers:
253 if driver not in devices[d]["Module_str"]:
254 devices[d]["Module_str"] = \
255 devices[d]["Module_str"] + ",%s" % driver
257 devices[d]["Module_str"] = ",".join(dpdk_drivers)
259 # make sure the driver and module strings do not have any duplicates
261 modules = devices[d]["Module_str"].split(",")
262 if devices[d]["Driver_str"] in modules:
263 modules.remove(devices[d]["Driver_str"])
264 devices[d]["Module_str"] = ",".join(modules)
267 def device_type_match(dev, devices_type):
268 for i in range(len(devices_type)):
270 [x for x in devices_type[i].values() if x is not None])
272 if dev["Class"][0:2] == devices_type[i]["Class"]:
273 match_count = match_count + 1
274 for key in devices_type[i].keys():
275 if key != 'Class' and devices_type[i][key]:
276 value_list = devices_type[i][key].split(',')
277 for value in value_list:
278 if value.strip(' ') == dev[key]:
279 match_count = match_count + 1
280 # count must be the number of non None parameters to match
281 if match_count == param_count:
285 def dev_id_from_dev_name(dev_name):
286 '''Take a device "name" - a string passed in by user to identify a NIC
287 device, and determine the device id - i.e. the domain:bus:slot.func - for
288 it, which can then be used to index into the devices array'''
290 # check if it's already a suitable index
291 if dev_name in devices:
293 # check if it's an index just missing the domain part
294 if "0000:" + dev_name in devices:
295 return "0000:" + dev_name
297 # check if it's an interface name, e.g. eth1
298 for d in devices.keys():
299 if dev_name in devices[d]["Interface"].split(","):
300 return devices[d]["Slot"]
301 # if nothing else matches - error
302 raise ValueError("Unknown device: %s. "
303 "Please specify device in \"bus:slot.func\" format" % dev_name)
306 def unbind_one(dev_id, force):
307 '''Unbind the device identified by "dev_id" from its current driver'''
308 dev = devices[dev_id]
309 if not has_driver(dev_id):
310 print("Notice: %s %s %s is not currently managed by any driver" %
311 (dev["Slot"], dev["Device_str"], dev["Interface"]), file=sys.stderr)
314 # prevent us disconnecting ourselves
315 if dev["Ssh_if"] and not force:
316 print("Warning: routing table indicates that interface %s is active. "
317 "Skipping unbind" % dev_id, file=sys.stderr)
320 # write to /sys to unbind
321 filename = "/sys/bus/pci/drivers/%s/unbind" % dev["Driver_str"]
323 f = open(filename, "a")
325 sys.exit("Error: unbind failed for %s - Cannot open %s" %
331 def bind_one(dev_id, driver, force):
332 '''Bind the device given by "dev_id" to the driver "driver". If the device
333 is already bound to a different driver, it will be unbound first'''
334 dev = devices[dev_id]
335 saved_driver = None # used to rollback any unbind in case of failure
337 # prevent disconnection of our ssh session
338 if dev["Ssh_if"] and not force:
339 print("Warning: routing table indicates that interface %s is active. "
340 "Not modifying" % dev_id, file=sys.stderr)
343 # unbind any existing drivers we don't want
344 if has_driver(dev_id):
345 if dev["Driver_str"] == driver:
346 print("Notice: %s already bound to driver %s, skipping" %
347 (dev_id, driver), file=sys.stderr)
349 saved_driver = dev["Driver_str"]
350 unbind_one(dev_id, force)
351 dev["Driver_str"] = "" # clear driver string
353 # For kernels >= 3.15 driver_override can be used to specify the driver
354 # for a device rather than relying on the driver to provide a positive
355 # match of the device. The existing process of looking up
356 # the vendor and device ID, adding them to the driver new_id,
357 # will erroneously bind other devices too which has the additional burden
358 # of unbinding those devices
359 if driver in dpdk_drivers:
360 filename = "/sys/bus/pci/devices/%s/driver_override" % dev_id
363 f = open(filename, "w")
365 print("Error: bind failed for %s - Cannot open %s"
366 % (dev_id, filename), file=sys.stderr)
369 f.write("%s" % driver)
372 print("Error: bind failed for %s - Cannot write driver %s to "
373 "PCI ID " % (dev_id, driver), file=sys.stderr)
375 # For kernels < 3.15 use new_id to add PCI id's to the driver
377 filename = "/sys/bus/pci/drivers/%s/new_id" % driver
379 f = open(filename, "w")
381 print("Error: bind failed for %s - Cannot open %s"
382 % (dev_id, filename), file=sys.stderr)
385 # Convert Device and Vendor Id to int to write to new_id
386 f.write("%04x %04x" % (int(dev["Vendor"], 16),
387 int(dev["Device"], 16)))
390 print("Error: bind failed for %s - Cannot write new PCI ID to "
391 "driver %s" % (dev_id, driver), file=sys.stderr)
394 # do the bind by writing to /sys
395 filename = "/sys/bus/pci/drivers/%s/bind" % driver
397 f = open(filename, "a")
399 print("Error: bind failed for %s - Cannot open %s"
400 % (dev_id, filename), file=sys.stderr)
401 if saved_driver is not None: # restore any previous driver
402 bind_one(dev_id, saved_driver, force)
408 # for some reason, closing dev_id after adding a new PCI ID to new_id
409 # results in IOError. however, if the device was successfully bound,
410 # we don't care for any errors and can safely ignore IOError
411 tmp = get_pci_device_details(dev_id, True)
412 if "Driver_str" in tmp and tmp["Driver_str"] == driver:
414 print("Error: bind failed for %s - Cannot bind to driver %s"
415 % (dev_id, driver), file=sys.stderr)
416 if saved_driver is not None: # restore any previous driver
417 bind_one(dev_id, saved_driver, force)
420 # For kernels > 3.15 driver_override is used to bind a device to a driver.
421 # Before unbinding it, overwrite driver_override with empty string so that
422 # the device can be bound to any other driver
423 filename = "/sys/bus/pci/devices/%s/driver_override" % dev_id
426 f = open(filename, "w")
428 sys.exit("Error: unbind failed for %s - Cannot open %s"
429 % (dev_id, filename))
434 sys.exit("Error: unbind failed for %s - Cannot open %s"
435 % (dev_id, filename))
438 def unbind_all(dev_list, force=False):
439 """Unbind method, takes a list of device locations"""
441 if dev_list[0] == "dpdk":
442 for d in devices.keys():
443 if "Driver_str" in devices[d]:
444 if devices[d]["Driver_str"] in dpdk_drivers:
445 unbind_one(devices[d]["Slot"], force)
449 dev_list = map(dev_id_from_dev_name, dev_list)
450 except ValueError as ex:
458 def bind_all(dev_list, driver, force=False):
459 """Bind method, takes a list of device locations"""
462 # a common user error is to forget to specify the driver the devices need to
463 # be bound to. check if the driver is a valid device, and if it is, show
464 # a meaningful error.
466 dev_id_from_dev_name(driver)
467 # if we've made it this far, this means that the "driver" was a valid
468 # device string, so it's probably not a valid driver name.
469 sys.exit("Error: Driver '%s' does not look like a valid driver. " \
470 "Did you forget to specify the driver to bind devices to?" % driver)
472 # driver generated error - it's not a valid device ID, so all is well
475 # check if we're attempting to bind to a driver that isn't loaded
476 if not module_is_loaded(driver.replace('-', '_')):
477 sys.exit("Error: Driver '%s' is not loaded." % driver)
480 dev_list = map(dev_id_from_dev_name, dev_list)
481 except ValueError as ex:
485 bind_one(d, driver, force)
487 # For kernels < 3.15 when binding devices to a generic driver
488 # (i.e. one that doesn't have a PCI ID table) using new_id, some devices
489 # that are not bound to any other driver could be bound even if no one has
490 # asked them to. hence, we check the list of drivers again, and see if
491 # some of the previously-unbound devices were erroneously bound.
492 if not exists("/sys/bus/pci/devices/%s/driver_override" % d):
493 for d in devices.keys():
494 # skip devices that were already bound or that we know should be bound
495 if "Driver_str" in devices[d] or d in dev_list:
498 # update information about this device
499 devices[d] = dict(devices[d].items() +
500 get_pci_device_details(d, True).items())
502 # check if updated information indicates that the device was bound
503 if "Driver_str" in devices[d]:
507 def display_devices(title, dev_list, extra_params=None):
508 '''Displays to the user the details of a list of devices given in
509 "dev_list". The "extra_params" parameter, if given, should contain a string
510 with %()s fields in it for replacement by the named fields in each
511 device's dictionary.'''
512 strings = [] # this holds the strings to print. We sort before printing
513 print("\n%s" % title)
514 print("="*len(title))
516 strings.append("<none>")
519 if extra_params is not None:
520 strings.append("%s '%s %s' %s" % (dev["Slot"],
525 strings.append("%s '%s'" % (dev["Slot"], dev["Device_str"]))
526 # sort before printing, so that the entries appear in PCI order
528 print("\n".join(strings)) # print one per line
530 def show_device_status(devices_type, device_name, if_field=False):
536 # split our list of network devices into the three categories above
537 for d in devices.keys():
538 if device_type_match(devices[d], devices_type):
539 if not has_driver(d):
540 no_drv.append(devices[d])
542 if devices[d]["Driver_str"] in dpdk_drivers:
543 dpdk_drv.append(devices[d])
545 kernel_drv.append(devices[d])
547 n_devs = len(dpdk_drv) + len(kernel_drv) + len(no_drv)
549 # don't bother displaying anything if there are no devices
551 msg = "No '%s' devices detected" % device_name
554 print("".join('=' * len(msg)))
557 # print each category separately, so we can clearly see what's used by DPDK
559 display_devices("%s devices using DPDK-compatible driver" % device_name,
560 dpdk_drv, "drv=%(Driver_str)s unused=%(Module_str)s")
564 if_text = "if=%(Interface)s "
565 display_devices("%s devices using kernel driver" % device_name, kernel_drv,
566 if_text + "drv=%(Driver_str)s "
567 "unused=%(Module_str)s %(Active)s")
569 display_devices("Other %s devices" % device_name, no_drv,
570 "unused=%(Module_str)s")
573 '''Function called when the script is passed the "--status" option.
574 Displays to the user what devices are bound to the igb_uio driver, the
575 kernel driver or to no driver'''
577 if status_dev in ["net", "all"]:
578 show_device_status(network_devices, "Network", if_field=True)
580 if status_dev in ["baseband", "all"]:
581 show_device_status(baseband_devices, "Baseband")
583 if status_dev in ["crypto", "all"]:
584 show_device_status(crypto_devices, "Crypto")
586 if status_dev in ["event", "all"]:
587 show_device_status(eventdev_devices, "Eventdev")
589 if status_dev in ["mempool", "all"]:
590 show_device_status(mempool_devices, "Mempool")
592 if status_dev in ["compress", "all"]:
593 show_device_status(compress_devices, "Compress")
595 if status_dev in ["misc", "all"]:
596 show_device_status(misc_devices, "Misc (rawdev)")
598 if status_dev in ["regex", "all"]:
599 show_device_status(regex_devices, "Regex")
603 '''Returns a list containing either:
604 * List of PCI B:D:F matching arg, using shell wildcards e.g. 80:04.*
605 * Only the passed arg if matching list is empty'''
606 sysfs_path = "/sys/bus/pci/devices"
607 for _glob in [arg, '0000:' + arg]:
608 paths = [basename(path) for path in glob(path_join(sysfs_path, _glob))]
615 '''Parses the command-line arguments given by the user and takes the
616 appropriate action for each'''
623 parser = argparse.ArgumentParser(
624 description='Utility to bind and unbind devices from Linux kernel',
625 formatter_class=argparse.RawDescriptionHelpFormatter,
630 To display current device status:
633 To display current network device status:
634 %(prog)s --status-dev net
636 To bind eth1 from the current driver and move to use vfio-pci
637 %(prog)s --bind=vfio-pci eth1
639 To unbind 0000:01:00.0 from using any driver
640 %(prog)s -u 0000:01:00.0
642 To bind 0000:02:00.0 and 0000:02:00.1 to the ixgbe kernel driver
643 %(prog)s -b ixgbe 02:00.0 02:00.1
650 help="Print the current status of all known devices.")
653 help="Print the status of given device group.",
654 choices=['baseband', 'compress', 'crypto', 'event',
655 'mempool', 'misc', 'net', 'regex'])
656 bind_group = parser.add_mutually_exclusive_group()
657 bind_group.add_argument(
661 help="Select the driver to use or \"none\" to unbind the device")
662 bind_group.add_argument(
666 help="Unbind a device (equivalent to \"-b none\")")
671 Override restriction on binding devices in use by Linux"
672 WARNING: This can lead to loss of network connection and should be used with caution.
679 Device specified as PCI "domain:bus:slot.func" syntax or "bus:slot.func" syntax.
680 For devices bound to Linux kernel drivers, they may be referred to by interface name.
683 opt = parser.parse_args()
687 status_dev = opt.status_dev
699 if not b_flag and not status_flag:
700 print("Error: No action specified for devices. "
701 "Please give a --bind, --ubind or --status option",
706 if b_flag and not args:
707 print("Error: No devices specified.", file=sys.stderr)
711 # resolve any PCI globs in the args
714 new_args.extend(pci_glob(arg))
717 def do_arg_actions():
718 '''do the actual action requested by the user'''
724 if b_flag in ["none", "None"]:
725 unbind_all(args, force_flag)
726 elif b_flag is not None:
727 bind_all(args, b_flag, force_flag)
729 if b_flag is not None:
731 # refresh if we have changed anything
732 get_device_details(network_devices)
733 get_device_details(baseband_devices)
734 get_device_details(crypto_devices)
735 get_device_details(eventdev_devices)
736 get_device_details(mempool_devices)
737 get_device_details(compress_devices)
738 get_device_details(regex_devices)
739 get_device_details(misc_devices)
744 '''program main function'''
745 # check if lspci is installed, suppress any output
746 with open(os.devnull, 'w') as devnull:
747 ret = subprocess.call(['which', 'lspci'],
748 stdout=devnull, stderr=devnull)
750 sys.exit("'lspci' not found - please install 'pciutils'")
754 get_device_details(network_devices)
755 get_device_details(baseband_devices)
756 get_device_details(crypto_devices)
757 get_device_details(eventdev_devices)
758 get_device_details(mempool_devices)
759 get_device_details(compress_devices)
760 get_device_details(regex_devices)
761 get_device_details(misc_devices)
764 if __name__ == "__main__":