1dee76c032
Add uio_pci_generic to the list of supported kernel drivers. Signed-off-by: Danny Zhou <danny.zhou@intel.com> Tested-by: Qun Wan <qun.wan@intel.com> Signed-off-by: Bruce Richardson <bruce.richardson@intel.com> Acked-by: Declan Doherty <declan.doherty@intel.com>
537 lines
20 KiB
Python
Executable File
537 lines
20 KiB
Python
Executable File
#! /usr/bin/python
|
|
#
|
|
# BSD LICENSE
|
|
#
|
|
# Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
|
|
# All rights reserved.
|
|
#
|
|
# Redistribution and use in source and binary forms, with or without
|
|
# modification, are permitted provided that the following conditions
|
|
# are met:
|
|
#
|
|
# * Redistributions of source code must retain the above copyright
|
|
# notice, this list of conditions and the following disclaimer.
|
|
# * Redistributions in binary form must reproduce the above copyright
|
|
# notice, this list of conditions and the following disclaimer in
|
|
# the documentation and/or other materials provided with the
|
|
# distribution.
|
|
# * Neither the name of Intel Corporation nor the names of its
|
|
# contributors may be used to endorse or promote products derived
|
|
# from this software without specific prior written permission.
|
|
#
|
|
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
|
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
|
# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
|
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
|
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
|
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
#
|
|
|
|
import sys, os, getopt, subprocess
|
|
from os.path import exists, abspath, dirname, basename
|
|
|
|
|
|
# The PCI device class for ETHERNET devices
|
|
ETHERNET_CLASS = "0200"
|
|
|
|
# global dict ethernet devices present. Dictionary indexed by PCI address.
|
|
# Each device within this is itself a dictionary of device properties
|
|
devices = {}
|
|
# list of supported DPDK drivers
|
|
dpdk_drivers = [ "igb_uio", "vfio-pci", "uio_pci_generic" ]
|
|
|
|
# command-line arg flags
|
|
b_flag = None
|
|
status_flag = False
|
|
force_flag = False
|
|
args = []
|
|
|
|
def usage():
|
|
'''Print usage information for the program'''
|
|
argv0 = basename(sys.argv[0])
|
|
print """
|
|
Usage:
|
|
------
|
|
|
|
%(argv0)s [options] DEVICE1 DEVICE2 ....
|
|
|
|
where DEVICE1, DEVICE2 etc, are specified via PCI "domain:bus:slot.func" syntax
|
|
or "bus:slot.func" syntax. For devices bound to Linux kernel drivers, they may
|
|
also be referred to by Linux interface name e.g. eth0, eth1, em0, em1, etc.
|
|
|
|
Options:
|
|
--help, --usage:
|
|
Display usage information and quit
|
|
|
|
--status:
|
|
Print the current status of all known network interfaces.
|
|
For each device, it displays the PCI domain, bus, slot and function,
|
|
along with a text description of the device. Depending upon whether the
|
|
device is being used by a kernel driver, the igb_uio driver, or no
|
|
driver, other relevant information will be displayed:
|
|
* the Linux interface name e.g. if=eth0
|
|
* the driver being used e.g. drv=igb_uio
|
|
* any suitable drivers not currently using that device
|
|
e.g. unused=igb_uio
|
|
NOTE: if this flag is passed along with a bind/unbind option, the status
|
|
display will always occur after the other operations have taken place.
|
|
|
|
-b driver, --bind=driver:
|
|
Select the driver to use or \"none\" to unbind the device
|
|
|
|
-u, --unbind:
|
|
Unbind a device (Equivalent to \"-b none\")
|
|
|
|
--force:
|
|
By default, devices which are used by Linux - as indicated by having
|
|
routes in the routing table - cannot be modified. Using the --force
|
|
flag overrides this behavior, allowing active links to be forcibly
|
|
unbound.
|
|
WARNING: This can lead to loss of network connection and should be used
|
|
with caution.
|
|
|
|
Examples:
|
|
---------
|
|
|
|
To display current device status:
|
|
%(argv0)s --status
|
|
|
|
To bind eth1 from the current driver and move to use igb_uio
|
|
%(argv0)s --bind=igb_uio eth1
|
|
|
|
To unbind 0000:01:00.0 from using any driver
|
|
%(argv0)s -u 0000:01:00.0
|
|
|
|
To bind 0000:02:00.0 and 0000:02:00.1 to the ixgbe kernel driver
|
|
%(argv0)s -b ixgbe 02:00.0 02:00.1
|
|
|
|
""" % locals() # replace items from local variables
|
|
|
|
# This is roughly compatible with check_output function in subprocess module
|
|
# which is only available in python 2.7.
|
|
def check_output(args, stderr=None):
|
|
'''Run a command and capture its output'''
|
|
return subprocess.Popen(args, stdout=subprocess.PIPE,
|
|
stderr=stderr).communicate()[0]
|
|
|
|
def find_module(mod):
|
|
'''find the .ko file for kernel module named mod.
|
|
Searches the $RTE_SDK/$RTE_TARGET directory, the kernel
|
|
modules directory and finally under the parent directory of
|
|
the script '''
|
|
# check $RTE_SDK/$RTE_TARGET directory
|
|
if 'RTE_SDK' in os.environ and 'RTE_TARGET' in os.environ:
|
|
path = "%s/%s/kmod/%s.ko" % (os.environ['RTE_SDK'],\
|
|
os.environ['RTE_TARGET'], mod)
|
|
if exists(path):
|
|
return path
|
|
|
|
# check using depmod
|
|
try:
|
|
depmod_out = check_output(["modinfo", "-n", mod], \
|
|
stderr=subprocess.STDOUT).lower()
|
|
if "error" not in depmod_out:
|
|
path = depmod_out.strip()
|
|
if exists(path):
|
|
return path
|
|
except: # if modinfo can't find module, it fails, so continue
|
|
pass
|
|
|
|
# check for a copy based off current path
|
|
tools_dir = dirname(abspath(sys.argv[0]))
|
|
if (tools_dir.endswith("tools")):
|
|
base_dir = dirname(tools_dir)
|
|
find_out = check_output(["find", base_dir, "-name", mod + ".ko"])
|
|
if len(find_out) > 0: #something matched
|
|
path = find_out.splitlines()[0]
|
|
if exists(path):
|
|
return path
|
|
|
|
def check_modules():
|
|
'''Checks that igb_uio is loaded'''
|
|
global dpdk_drivers
|
|
|
|
fd = file("/proc/modules")
|
|
loaded_mods = fd.readlines()
|
|
fd.close()
|
|
|
|
# list of supported modules
|
|
mods = [{"Name" : driver, "Found" : False} for driver in dpdk_drivers]
|
|
|
|
# first check if module is loaded
|
|
for line in loaded_mods:
|
|
for mod in mods:
|
|
if line.startswith(mod["Name"]):
|
|
mod["Found"] = True
|
|
# special case for vfio_pci (module is named vfio-pci,
|
|
# but its .ko is named vfio_pci)
|
|
elif line.replace("_", "-").startswith(mod["Name"]):
|
|
mod["Found"] = True
|
|
|
|
# check if we have at least one loaded module
|
|
if True not in [mod["Found"] for mod in mods] and b_flag is not None:
|
|
print "Error - no supported modules are loaded"
|
|
sys.exit(1)
|
|
|
|
# change DPDK driver list to only contain drivers that are loaded
|
|
dpdk_drivers = [mod["Name"] for mod in mods if mod["Found"]]
|
|
|
|
def has_driver(dev_id):
|
|
'''return true if a device is assigned to a driver. False otherwise'''
|
|
return "Driver_str" in devices[dev_id]
|
|
|
|
def get_pci_device_details(dev_id):
|
|
'''This function gets additional details for a PCI device'''
|
|
device = {}
|
|
|
|
extra_info = check_output(["lspci", "-vmmks", dev_id]).splitlines()
|
|
|
|
# parse lspci details
|
|
for line in extra_info:
|
|
if len(line) == 0:
|
|
continue
|
|
name, value = line.split("\t", 1)
|
|
name = name.strip(":") + "_str"
|
|
device[name] = value
|
|
# check for a unix interface name
|
|
sys_path = "/sys/bus/pci/devices/%s/net/" % dev_id
|
|
if exists(sys_path):
|
|
device["Interface"] = ",".join(os.listdir(sys_path))
|
|
else:
|
|
device["Interface"] = ""
|
|
# check if a port is used for ssh connection
|
|
device["Ssh_if"] = False
|
|
device["Active"] = ""
|
|
|
|
return device
|
|
|
|
def get_nic_details():
|
|
'''This function populates the "devices" dictionary. The keys used are
|
|
the pci addresses (domain:bus:slot.func). The values are themselves
|
|
dictionaries - one for each NIC.'''
|
|
global devices
|
|
global dpdk_drivers
|
|
|
|
# clear any old data
|
|
devices = {}
|
|
# first loop through and read details for all devices
|
|
# request machine readable format, with numeric IDs
|
|
dev = {};
|
|
dev_lines = check_output(["lspci", "-Dvmmn"]).splitlines()
|
|
for dev_line in dev_lines:
|
|
if (len(dev_line) == 0):
|
|
if dev["Class"] == ETHERNET_CLASS:
|
|
#convert device and vendor ids to numbers, then add to global
|
|
dev["Vendor"] = int(dev["Vendor"],16)
|
|
dev["Device"] = int(dev["Device"],16)
|
|
devices[dev["Slot"]] = dict(dev) # use dict to make copy of dev
|
|
else:
|
|
name, value = dev_line.split("\t", 1)
|
|
dev[name.rstrip(":")] = value
|
|
|
|
# check what is the interface if any for an ssh connection if
|
|
# any to this host, so we can mark it later.
|
|
ssh_if = []
|
|
route = check_output(["ip", "-o", "route"])
|
|
# filter out all lines for 169.254 routes
|
|
route = "\n".join(filter(lambda ln: not ln.startswith("169.254"),
|
|
route.splitlines()))
|
|
rt_info = route.split()
|
|
for i in xrange(len(rt_info) - 1):
|
|
if rt_info[i] == "dev":
|
|
ssh_if.append(rt_info[i+1])
|
|
|
|
# based on the basic info, get extended text details
|
|
for d in devices.keys():
|
|
# get additional info and add it to existing data
|
|
devices[d] = dict(devices[d].items() +
|
|
get_pci_device_details(d).items())
|
|
|
|
for _if in ssh_if:
|
|
if _if in devices[d]["Interface"].split(","):
|
|
devices[d]["Ssh_if"] = True
|
|
devices[d]["Active"] = "*Active*"
|
|
break;
|
|
|
|
# add igb_uio to list of supporting modules if needed
|
|
if "Module_str" in devices[d]:
|
|
for driver in dpdk_drivers:
|
|
if driver not in devices[d]["Module_str"]:
|
|
devices[d]["Module_str"] = devices[d]["Module_str"] + ",%s" % driver
|
|
else:
|
|
devices[d]["Module_str"] = ",".join(dpdk_drivers)
|
|
|
|
# make sure the driver and module strings do not have any duplicates
|
|
if has_driver(d):
|
|
modules = devices[d]["Module_str"].split(",")
|
|
if devices[d]["Driver_str"] in modules:
|
|
modules.remove(devices[d]["Driver_str"])
|
|
devices[d]["Module_str"] = ",".join(modules)
|
|
|
|
def dev_id_from_dev_name(dev_name):
|
|
'''Take a device "name" - a string passed in by user to identify a NIC
|
|
device, and determine the device id - i.e. the domain:bus:slot.func - for
|
|
it, which can then be used to index into the devices array'''
|
|
dev = None
|
|
# check if it's already a suitable index
|
|
if dev_name in devices:
|
|
return dev_name
|
|
# check if it's an index just missing the domain part
|
|
elif "0000:" + dev_name in devices:
|
|
return "0000:" + dev_name
|
|
else:
|
|
# check if it's an interface name, e.g. eth1
|
|
for d in devices.keys():
|
|
if dev_name in devices[d]["Interface"].split(","):
|
|
return devices[d]["Slot"]
|
|
# if nothing else matches - error
|
|
print "Unknown device: %s. " \
|
|
"Please specify device in \"bus:slot.func\" format" % dev_name
|
|
sys.exit(1)
|
|
|
|
def unbind_one(dev_id, force):
|
|
'''Unbind the device identified by "dev_id" from its current driver'''
|
|
dev = devices[dev_id]
|
|
if not has_driver(dev_id):
|
|
print "%s %s %s is not currently managed by any driver\n" % \
|
|
(dev["Slot"], dev["Device_str"], dev["Interface"])
|
|
return
|
|
|
|
# prevent us disconnecting ourselves
|
|
if dev["Ssh_if"] and not force:
|
|
print "Routing table indicates that interface %s is active" \
|
|
". Skipping unbind" % (dev_id)
|
|
return
|
|
|
|
# write to /sys to unbind
|
|
filename = "/sys/bus/pci/drivers/%s/unbind" % dev["Driver_str"]
|
|
try:
|
|
f = open(filename, "a")
|
|
except:
|
|
print "Error: unbind failed for %s - Cannot open %s" % (dev_id, filename)
|
|
sys/exit(1)
|
|
f.write(dev_id)
|
|
f.close()
|
|
|
|
def bind_one(dev_id, driver, force):
|
|
'''Bind the device given by "dev_id" to the driver "driver". If the device
|
|
is already bound to a different driver, it will be unbound first'''
|
|
dev = devices[dev_id]
|
|
saved_driver = None # used to rollback any unbind in case of failure
|
|
|
|
# prevent disconnection of our ssh session
|
|
if dev["Ssh_if"] and not force:
|
|
print "Routing table indicates that interface %s is active" \
|
|
". Not modifying" % (dev_id)
|
|
return
|
|
|
|
# unbind any existing drivers we don't want
|
|
if has_driver(dev_id):
|
|
if dev["Driver_str"] == driver:
|
|
print "%s already bound to driver %s, skipping\n" % (dev_id, driver)
|
|
return
|
|
else:
|
|
saved_driver = dev["Driver_str"]
|
|
unbind_one(dev_id, force)
|
|
dev["Driver_str"] = "" # clear driver string
|
|
|
|
# if we are binding to one of DPDK drivers, add PCI id's to that driver
|
|
if driver in dpdk_drivers:
|
|
filename = "/sys/bus/pci/drivers/%s/new_id" % driver
|
|
try:
|
|
f = open(filename, "w")
|
|
except:
|
|
print "Error: bind failed for %s - Cannot open %s" % (dev_id, filename)
|
|
return
|
|
try:
|
|
f.write("%04x %04x" % (dev["Vendor"], dev["Device"]))
|
|
f.close()
|
|
except:
|
|
print "Error: bind failed for %s - Cannot write new PCI ID to " \
|
|
"driver %s" % (dev_id, driver)
|
|
return
|
|
|
|
# do the bind by writing to /sys
|
|
filename = "/sys/bus/pci/drivers/%s/bind" % driver
|
|
try:
|
|
f = open(filename, "a")
|
|
except:
|
|
print "Error: bind failed for %s - Cannot open %s" % (dev_id, filename)
|
|
if saved_driver is not None: # restore any previous driver
|
|
bind_one(dev_id, saved_driver, force)
|
|
return
|
|
try:
|
|
f.write(dev_id)
|
|
f.close()
|
|
except:
|
|
# for some reason, closing dev_id after adding a new PCI ID to new_id
|
|
# results in IOError. however, if the device was successfully bound,
|
|
# we don't care for any errors and can safely ignore IOError
|
|
tmp = get_pci_device_details(dev_id)
|
|
if "Driver_str" in tmp and tmp["Driver_str"] == driver:
|
|
return
|
|
print "Error: bind failed for %s - Cannot bind to driver %s" % (dev_id, driver)
|
|
if saved_driver is not None: # restore any previous driver
|
|
bind_one(dev_id, saved_driver, force)
|
|
return
|
|
|
|
|
|
def unbind_all(dev_list, force=False):
|
|
"""Unbind method, takes a list of device locations"""
|
|
dev_list = map(dev_id_from_dev_name, dev_list)
|
|
for d in dev_list:
|
|
unbind_one(d, force)
|
|
|
|
def bind_all(dev_list, driver, force=False):
|
|
"""Unbind method, takes a list of device locations"""
|
|
global devices
|
|
|
|
dev_list = map(dev_id_from_dev_name, dev_list)
|
|
|
|
for d in dev_list:
|
|
bind_one(d, driver, force)
|
|
|
|
# when binding devices to a generic driver (i.e. one that doesn't have a
|
|
# PCI ID table), some devices that are not bound to any other driver could
|
|
# be bound even if no one has asked them to. hence, we check the list of
|
|
# drivers again, and see if some of the previously-unbound devices were
|
|
# erroneously bound.
|
|
for d in devices.keys():
|
|
# skip devices that were already bound or that we know should be bound
|
|
if "Driver_str" in devices[d] or d in dev_list:
|
|
continue
|
|
|
|
# update information about this device
|
|
devices[d] = dict(devices[d].items() +
|
|
get_pci_device_details(d).items())
|
|
|
|
# check if updated information indicates that the device was bound
|
|
if "Driver_str" in devices[d]:
|
|
unbind_one(d, force)
|
|
|
|
def display_devices(title, dev_list, extra_params = None):
|
|
'''Displays to the user the details of a list of devices given in "dev_list"
|
|
The "extra_params" parameter, if given, should contain a string with
|
|
%()s fields in it for replacement by the named fields in each device's
|
|
dictionary.'''
|
|
strings = [] # this holds the strings to print. We sort before printing
|
|
print "\n%s" % title
|
|
print "="*len(title)
|
|
if len(dev_list) == 0:
|
|
strings.append("<none>")
|
|
else:
|
|
for dev in dev_list:
|
|
if extra_params is not None:
|
|
strings.append("%s '%s' %s" % (dev["Slot"], \
|
|
dev["Device_str"], extra_params % dev))
|
|
else:
|
|
strings.append("%s '%s'" % (dev["Slot"], dev["Device_str"]))
|
|
# sort before printing, so that the entries appear in PCI order
|
|
strings.sort()
|
|
print "\n".join(strings) # print one per line
|
|
|
|
def show_status():
|
|
'''Function called when the script is passed the "--status" option. Displays
|
|
to the user what devices are bound to the igb_uio driver, the kernel driver
|
|
or to no driver'''
|
|
global dpdk_drivers
|
|
kernel_drv = []
|
|
dpdk_drv = []
|
|
no_drv = []
|
|
|
|
# split our list of devices into the three categories above
|
|
for d in devices.keys():
|
|
if not has_driver(d):
|
|
no_drv.append(devices[d])
|
|
continue
|
|
if devices[d]["Driver_str"] in dpdk_drivers:
|
|
dpdk_drv.append(devices[d])
|
|
else:
|
|
kernel_drv.append(devices[d])
|
|
|
|
# print each category separately, so we can clearly see what's used by DPDK
|
|
display_devices("Network devices using DPDK-compatible driver", dpdk_drv, \
|
|
"drv=%(Driver_str)s unused=%(Module_str)s")
|
|
display_devices("Network devices using kernel driver", kernel_drv,
|
|
"if=%(Interface)s drv=%(Driver_str)s unused=%(Module_str)s %(Active)s")
|
|
display_devices("Other network devices", no_drv,\
|
|
"unused=%(Module_str)s")
|
|
|
|
def parse_args():
|
|
'''Parses the command-line arguments given by the user and takes the
|
|
appropriate action for each'''
|
|
global b_flag
|
|
global status_flag
|
|
global force_flag
|
|
global args
|
|
if len(sys.argv) <= 1:
|
|
usage()
|
|
sys.exit(0)
|
|
|
|
try:
|
|
opts, args = getopt.getopt(sys.argv[1:], "b:u",
|
|
["help", "usage", "status", "force",
|
|
"bind=", "unbind"])
|
|
except getopt.GetoptError, error:
|
|
print str(error)
|
|
print "Run '%s --usage' for further information" % sys.argv[0]
|
|
sys.exit(1)
|
|
|
|
for opt, arg in opts:
|
|
if opt == "--help" or opt == "--usage":
|
|
usage()
|
|
sys.exit(0)
|
|
if opt == "--status":
|
|
status_flag = True
|
|
if opt == "--force":
|
|
force_flag = True
|
|
if opt == "-b" or opt == "-u" or opt == "--bind" or opt == "--unbind":
|
|
if b_flag is not None:
|
|
print "Error - Only one bind or unbind may be specified\n"
|
|
sys.exit(1)
|
|
if opt == "-u" or opt == "--unbind":
|
|
b_flag = "none"
|
|
else:
|
|
b_flag = arg
|
|
|
|
def do_arg_actions():
|
|
'''do the actual action requested by the user'''
|
|
global b_flag
|
|
global status_flag
|
|
global force_flag
|
|
global args
|
|
|
|
if b_flag is None and not status_flag:
|
|
print "Error: No action specified for devices. Please give a -b or -u option"
|
|
print "Run '%s --usage' for further information" % sys.argv[0]
|
|
sys.exit(1)
|
|
|
|
if b_flag is not None and len(args) == 0:
|
|
print "Error: No devices specified."
|
|
print "Run '%s --usage' for further information" % sys.argv[0]
|
|
sys.exit(1)
|
|
|
|
if b_flag == "none" or b_flag == "None":
|
|
unbind_all(args, force_flag)
|
|
elif b_flag is not None:
|
|
bind_all(args, b_flag, force_flag)
|
|
if status_flag:
|
|
if b_flag is not None:
|
|
get_nic_details() # refresh if we have changed anything
|
|
show_status()
|
|
|
|
def main():
|
|
'''program main function'''
|
|
parse_args()
|
|
check_modules()
|
|
get_nic_details()
|
|
do_arg_actions()
|
|
|
|
if __name__ == "__main__":
|
|
main()
|