# Copyright(c) 2010-2014 Intel Corporation
#
+from __future__ import print_function
import sys
import os
import getopt
devices = {}
# list of supported DPDK drivers
dpdk_drivers = ["igb_uio", "vfio-pci", "uio_pci_generic"]
+# list of currently loaded kernel modules
+loaded_modules = None
# command-line arg flags
b_flag = None
return subprocess.Popen(args, stdout=subprocess.PIPE,
stderr=stderr).communicate()[0]
+# check if a specific kernel module is loaded
+def module_is_loaded(module):
+ global loaded_modules
+
+ if module == 'vfio_pci':
+ module = 'vfio-pci'
+
+ if loaded_modules:
+ return module in loaded_modules
+
+ # Get list of sysfs modules (both built-in and dynamically loaded)
+ sysfs_path = '/sys/module/'
+
+ # Get the list of directories in sysfs_path
+ sysfs_mods = [m for m in os.listdir(sysfs_path)
+ if os.path.isdir(os.path.join(sysfs_path, m))]
+
+ # special case for vfio_pci (module is named vfio-pci,
+ # but its .ko is named vfio_pci)
+ sysfs_mods = [a if a != 'vfio_pci' else 'vfio-pci' for a in sysfs_mods]
+
+ loaded_modules = sysfs_mods
+
+ return module in sysfs_mods
+
def check_modules():
'''Checks that igb_uio is loaded'''
mods = [{"Name": driver, "Found": False} for driver in dpdk_drivers]
# first check if module is loaded
- try:
- # Get list of sysfs modules (both built-in and dynamically loaded)
- sysfs_path = '/sys/module/'
-
- # Get the list of directories in sysfs_path
- sysfs_mods = [os.path.join(sysfs_path, o) for o
- in os.listdir(sysfs_path)
- if os.path.isdir(os.path.join(sysfs_path, o))]
-
- # Extract the last element of '/sys/module/abc' in the array
- sysfs_mods = [a.split('/')[-1] for a in sysfs_mods]
-
- # special case for vfio_pci (module is named vfio-pci,
- # but its .ko is named vfio_pci)
- sysfs_mods = [a if a != 'vfio_pci' else 'vfio-pci' for a in sysfs_mods]
-
- for mod in mods:
- if mod["Name"] in sysfs_mods:
- mod["Found"] = True
- except:
- pass
+ for mod in mods:
+ if module_is_loaded(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:
- if b_flag in dpdk_drivers:
- print("Error - no supported modules(DPDK driver) are loaded")
- sys.exit(1)
- else:
- print("Warning - no supported modules(DPDK driver) are loaded")
+ print("Warning: no supported DPDK kernel modules are loaded", file=sys.stderr)
# change DPDK driver list to only contain drivers that are loaded
dpdk_drivers = [mod["Name"] for mod in mods if mod["Found"]]
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)
+ raise ValueError("Unknown device: %s. "
+ "Please specify device in \"bus:slot.func\" format" % dev_name)
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"]))
+ print("Notice: %s %s %s is not currently managed by any driver" %
+ (dev["Slot"], dev["Device_str"], dev["Interface"]), file=sys.stderr)
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))
+ print("Warning: routing table indicates that interface %s is active. "
+ "Skipping unbind" % dev_id, file=sys.stderr)
return
# write to /sys to unbind
try:
f = open(filename, "a")
except:
- print("Error: unbind failed for %s - Cannot open %s"
- % (dev_id, filename))
- sys.exit(1)
+ sys.exit("Error: unbind failed for %s - Cannot open %s" %
+ (dev_id, filename))
f.write(dev_id)
f.close()
# 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))
+ print("Warning: routing table indicates that interface %s is active. "
+ "Not modifying" % dev_id, file=sys.stderr)
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))
+ print("Notice: %s already bound to driver %s, skipping" %
+ (dev_id, driver), file=sys.stderr)
return
else:
saved_driver = dev["Driver_str"]
f = open(filename, "w")
except:
print("Error: bind failed for %s - Cannot open %s"
- % (dev_id, filename))
+ % (dev_id, filename), file=sys.stderr)
return
try:
f.write("%s" % driver)
f.close()
except:
print("Error: bind failed for %s - Cannot write driver %s to "
- "PCI ID " % (dev_id, driver))
+ "PCI ID " % (dev_id, driver), file=sys.stderr)
return
# For kernels < 3.15 use new_id to add PCI id's to the driver
else:
f = open(filename, "w")
except:
print("Error: bind failed for %s - Cannot open %s"
- % (dev_id, filename))
+ % (dev_id, filename), file=sys.stderr)
return
try:
# Convert Device and Vendor Id to int to write to new_id
f.close()
except:
print("Error: bind failed for %s - Cannot write new PCI ID to "
- "driver %s" % (dev_id, driver))
+ "driver %s" % (dev_id, driver), file=sys.stderr)
return
# do the bind by writing to /sys
f = open(filename, "a")
except:
print("Error: bind failed for %s - Cannot open %s"
- % (dev_id, filename))
+ % (dev_id, filename), file=sys.stderr)
if saved_driver is not None: # restore any previous driver
bind_one(dev_id, saved_driver, force)
return
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))
+ % (dev_id, driver), file=sys.stderr)
if saved_driver is not None: # restore any previous driver
bind_one(dev_id, saved_driver, force)
return
try:
f = open(filename, "w")
except:
- print("Error: unbind failed for %s - Cannot open %s"
+ sys.exit("Error: unbind failed for %s - Cannot open %s"
% (dev_id, filename))
- sys.exit(1)
try:
f.write("\00")
f.close()
except:
- print("Error: unbind failed for %s - Cannot open %s"
+ sys.exit("Error: unbind failed for %s - Cannot open %s"
% (dev_id, filename))
- sys.exit(1)
def unbind_all(dev_list, force=False):
unbind_one(devices[d]["Slot"], force)
return
- dev_list = map(dev_id_from_dev_name, dev_list)
+ try:
+ dev_list = map(dev_id_from_dev_name, dev_list)
+ except ValueError as ex:
+ print(ex)
+ sys.exit(1)
+
for d in dev_list:
unbind_one(d, force)
"""Bind method, takes a list of device locations"""
global devices
- dev_list = map(dev_id_from_dev_name, dev_list)
+ # a common user error is to forget to specify the driver the devices need to
+ # be bound to. check if the driver is a valid device, and if it is, show
+ # a meaningful error.
+ try:
+ dev_id_from_dev_name(driver)
+ # if we've made it this far, this means that the "driver" was a valid
+ # device string, so it's probably not a valid driver name.
+ sys.exit("Error: Driver '%s' does not look like a valid driver. " \
+ "Did you forget to specify the driver to bind devices to?" % driver)
+ except ValueError:
+ # driver generated error - it's not a valid device ID, so all is well
+ pass
+
+ # check if we're attempting to bind to a driver that isn't loaded
+ if not module_is_loaded(driver.replace('-','_')):
+ sys.exit("Error: Driver '%s' is not loaded." % driver)
+
+ try:
+ dev_list = map(dev_id_from_dev_name, dev_list)
+ except ValueError as ex:
+ sys.exit(ex)
for d in dev_list:
bind_one(d, driver, 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)
+ sys.exit("Error: binding and unbinding are mutually exclusive")
if opt == "-u" or opt == "--unbind":
b_flag = "none"
else:
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])
+ print("Error: No action specified for devices. "
+ "Please give a -b or -u option", file=sys.stderr)
+ usage()
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])
+ print("Error: No devices specified.", file=sys.stderr)
+ usage()
sys.exit(1)
if b_flag == "none" or b_flag == "None":
ret = subprocess.call(['which', 'lspci'],
stdout=devnull, stderr=devnull)
if ret != 0:
- print("'lspci' not found - please install 'pciutils'")
- sys.exit(1)
+ sys.exit("'lspci' not found - please install 'pciutils'")
parse_args()
check_modules()
clear_data()
git.droids-corp.org / dpdk.git / blobdiff