# global dict ethernet devices present. Dictionary indexed by PCI address.
# Each device within this is itself a dictionary of device properties
devices = {}
-# list of vendor:device pairs (again stored as dictionary) supported by igb_uio
-module_dev_ids = []
def usage():
'''Print usage information for the program'''
return path
def check_modules():
- '''Checks that the needed modules (igb_uio) is loaded, and then
- determine from the .ko file, what its supported device ids are'''
- global module_dev_ids
+ '''Checks that igb_uio is loaded'''
fd = file("/proc/modules")
loaded_mods = fd.readlines()
print "Error - module %s not loaded" %mod
sys.exit(1)
- # now find the .ko and get list of supported vendor/dev-ids
- modpath = find_module(mod)
- if modpath is None:
- print "Cannot find module file %s" % (mod + ".ko")
- sys.exit(1)
- depmod_output = check_output(["depmod", "-n", modpath]).splitlines()
- for line in depmod_output:
- if not line.startswith("alias"):
- continue
- if not line.endswith(mod):
- continue
- lineparts = line.split()
- if not(lineparts[1].startswith("pci:")):
- continue;
- else:
- lineparts[1] = lineparts[1][4:]
- vendor = lineparts[1][:9]
- device = lineparts[1][9:18]
- if vendor.startswith("v") and device.startswith("d"):
- module_dev_ids.append({"Vendor": int(vendor[1:],16),
- "Device": int(device[1:],16)})
-
-def is_supported_device(dev_id):
- '''return true if device is supported by igb_uio, false otherwise'''
- for dev in module_dev_ids:
- if (dev["Vendor"] == devices[dev_id]["Vendor"] and
- dev["Device"] == devices[dev_id]["Device"]):
- return True
- return False
-
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
# based on the basic info, get extended text details
for d in devices.keys():
- extra_info = check_output(["lspci", "-vmmks", d]).splitlines()
- # parse lspci details
- for line in extra_info:
- if len(line) == 0:
- continue
- name, value = line.split("\t", 1)
- name = name.strip(":") + "_str"
- devices[d][name] = value
- # check for a unix interface name
- sys_path = "/sys/bus/pci/devices/%s/net/" % d
- if exists(sys_path):
- devices[d]["Interface"] = ",".join(os.listdir(sys_path))
- else:
- devices[d]["Interface"] = ""
- # check if a port is used for ssh connection
- devices[d]["Ssh_if"] = False
- devices[d]["Active"] = ""
+ # 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
break;
# add igb_uio to list of supporting modules if needed
- if is_supported_device(d):
- if "Module_str" in devices[d]:
- if "igb_uio" not in devices[d]["Module_str"]:
- devices[d]["Module_str"] = devices[d]["Module_str"] + ",igb_uio"
- else:
- devices[d]["Module_str"] = "igb_uio"
- if "Module_str" not in devices[d]:
- devices[d]["Module_str"] = "<none>"
+ if "Module_str" in devices[d]:
+ if "igb_uio" not in devices[d]["Module_str"]:
+ devices[d]["Module_str"] = devices[d]["Module_str"] + ",igb_uio"
+ else:
+ devices[d]["Module_str"] = "igb_uio"
+
# make sure the driver and module strings do not have any duplicates
if has_driver(d):
modules = devices[d]["Module_str"].split(",")
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 == "igb_uio":
+ 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.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)
git.droids-corp.org / dpdk.git / blobdiff