[v3] usertools/dpdk-devbind: add support for PCI wildcards
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Commit Message
When binding or unbinding a range of devices, it can be useful to use
wildcards to specify the devices rather than repeating the same prefix
multiple times. We can use the python "glob" module to give us this
functionality - at least for PCI devices - by checking /sys for matching
files.
Examples of use from my system:
./dpdk-devbind.py -b vfio-pci 80:04.*
./dpdk-devbind.py -u 80:04.[2-7]
The first example binds eight devices, 80:04.0..80:04.7, to vfio-pci. The
second then unbinds six of those devices, 80:04.2..80:04.7, from any
driver.
Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
Tested-by: Ferruh Yigit <ferruh.yigit@intel.com>
---
V3: fix typo in help text additions
V2: added help text additions
---
usertools/dpdk-devbind.py | 16 ++++++++++++++++
1 file changed, 16 insertions(+)
@@ -8,6 +8,7 @@
import os
import getopt
import subprocess
+from glob import glob
from os.path import exists, abspath, dirname, basename
if sys.version_info.major < 3:
@@ -89,6 +90,8 @@ def usage():
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.
+If devices are specified using PCI <domain:>bus:device:func format, then
+shell wildcards and ranges may be used, e.g. 80:04.*, 80:04.[0-3]
Options:
--help, --usage:
@@ -145,6 +148,9 @@ def usage():
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
+To bind all functions on device 0000:02:00 to ixgbe kernel driver
+ %(argv0)s -b ixgbe 02:00.*
+
""" % locals()) # replace items from local variables
@@ -689,6 +695,16 @@ def parse_args():
else:
b_flag = arg
+ # resolve any PCI globs in the args
+ new_args = []
+ sysfs_path = "/sys/bus/pci/devices/"
+ for arg in args:
+ globbed_arg = glob(sysfs_path + arg) + glob(sysfs_path + "0000:" + arg)
+ if globbed_arg:
+ new_args.extend([a[len(sysfs_path):] for a in globbed_arg])
+ else:
+ new_args.append(arg)
+ args = new_args
def do_arg_actions():
'''do the actual action requested by the user'''