[dpdk-dev] dpdk-devbind can't be used misc with kernel tools

Tu, LijuanX A lijuanx.a.tu at intel.com
Wed Apr 26 08:19:55 CEST 2017

Hi Guduri,

I am a tester from intel dpdk team. I get a issues on usertools/dpdk-devbind.py

With the usertools/dpdk-devbind.py , I can't bind driver as expect.

I use the "dpdk-devbind.py" bind pci to igb_uio, then I using kernel tools  bind pci  to ixgbe,
I can bind pci to igb_uio successfully ,but it  bind back to ixgbe failed..

Bind pci to igb_uio and then  bind to ixgbe ,both use "dpdk-devbind.py", it works well.

Could you . have a look at this as soon as possible ,it block the daily regression test.
Thank you very much.

There are my test env and steps:

dpdk commit eba33e87ad37626604be7186e746751f99691084
Components: usertools/dpdk-devbind.py
kernel: 4.8.6-300.fc25.x86_64
driver: ixgbe
version: 5.0.4
firmware-version: 0x61bf0001
Expect: we can use dpdk-devbind.py to bind or unbind PCI-device, we also can use kernel tools to bind or unbind PCI-device, such as :
# ./dpdk-devbind.py --bind=igb_uio 0000:05:00.0
0000:05:00.0 '82599ES 10-Gigabit SFI/SFP+ Network Connection 10fb' drv=igb_uio unused=

# echo "8086 10fd" >/sys/bus/pci/drivers/ixgbe/new_id
# echo "0000:05:00.0" >/sys/bus/pci/devices/0000\:05\:00.0/driver/unbind
# echo "0000:05:00.0" >/sys/bus/pci/drivers/ixgbe/
# echo "0000:05:00.0" >/sys/bus/pci/drivers/ixgbe/bind
-bash: echo: write error: No such device
0000:05:00.0 '82599ES 10-Gigabit SFI/SFP+ Network Connection' unused=ixgbe,igb_uio
It can't bind to ixgbe, expect it can bind to ixgbe.
I think the related commit are ::
commit 2fc3502935700243d9a6d903166e6fd11e429843
Author: Guduri Prathyusha <gprathyusha at caviumnetworks.com>
Date:   Wed Mar 22 19:41:29 2017 +0530
usertools: use optimized driver override scheme to bind

commit c3ce205d5729867bd1c4c4429a80e01a528d5905
Author: Guduri Prathyusha <gprathyusha at caviumnetworks.com>
Date:   Wed Mar 22 19:41:28 2017 +0530
    usertools: optimize lspci invocation

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