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From: Tomasz K <tomasz.kasowicz@gmail.com>
Date: Wed, 9 Apr 2014 16:03:55 +0200
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Subject: [dpdk-dev] l2fwd not working on PF while working on VF
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Dear All

I have a setup with Intel 82576 DPDK NIC.
For one of the available DPDK ports i have created 8 VFs using igb_uio
based on steps presented in programmers guide. Some of them are attached to
VM, some maybe used on host

After some tests with l2fwd application i found out that it is not working
for PF, but works perfectly for any VF (both on host and in VM).

I'm still trying to find root cause of this issue but maybe someone
encountered such problem

Thanks in advance
Tomasz Kasowicz

Setup:
Intel(R) Xeon(R) CPU E31220 @ 3.10GHz running Ubuntu 12.04 LTS

pci_unbind.py --status

Network devices using IGB_UIO driver
====================================
0000:01:00.1 '82576NS Gigabit Network Connection' drv=igb_uio unused=igb
0000:02:11.1 '82576 Virtual Function' drv=igb_uio unused=igbvf

Network devices using kernel driver
===================================
0000:00:19.0 '82579LM Gigabit Network Connection' if=eth1 drv=e1000e
unused= *Active*
0000:01:00.0 '82576NS Gigabit Network Connection' if=eth0 drv=igb
unused=igb_uio *Active*
0000:02:10.1 '82576 Virtual Function' if= drv=pci-stub unused=igbvf,igb_uio
0000:02:10.3 '82576 Virtual Function' if= drv=pci-stub unused=igbvf,igb_uio
0000:02:10.5 '82576 Virtual Function' if= drv=pci-stub unused=igbvf,igb_uio
0000:02:10.7 '82576 Virtual Function' if= drv=pci-stub unused=igbvf,igb_uio
0000:02:11.3 '82576 Virtual Function' if= drv=pci-stub unused=igbvf,igb_uio
0000:02:11.5 '82576 Virtual Function' if= drv=pci-stub unused=igbvf,igb_uio
0000:02:11.7 '82576 Virtual Function' if= drv=pci-stub unused=igbvf,igb_uio
0000:04:00.0 '82574L Gigabit Network Connection' if=eth3 drv=e1000e
unused=igb_uio

Other network devices
=====================
<none>


cat /sys/bus/pci/devices/0000\:01\:00.1/max_vfs
8

ls -alrt /sys/bus/pci/devices/0000\:01\:00.1/virtfn*
lrwxrwxrwx 1 root root 0 Apr  9 12:09
/sys/bus/pci/devices/0000:01:00.1/virtfn7 -> ../0000:02:11.7
lrwxrwxrwx 1 root root 0 Apr  9 12:09
/sys/bus/pci/devices/0000:01:00.1/virtfn6 -> ../0000:02:11.5
lrwxrwxrwx 1 root root 0 Apr  9 12:09
/sys/bus/pci/devices/0000:01:00.1/virtfn5 -> ../0000:02:11.3
lrwxrwxrwx 1 root root 0 Apr  9 12:09
/sys/bus/pci/devices/0000:01:00.1/virtfn4 -> ../0000:02:11.1
lrwxrwxrwx 1 root root 0 Apr  9 12:09
/sys/bus/pci/devices/0000:01:00.1/virtfn3 -> ../0000:02:10.7
lrwxrwxrwx 1 root root 0 Apr  9 12:09
/sys/bus/pci/devices/0000:01:00.1/virtfn2 -> ../0000:02:10.5
lrwxrwxrwx 1 root root 0 Apr  9 12:09
/sys/bus/pci/devices/0000:01:00.1/virtfn1 -> ../0000:02:10.3
lrwxrwxrwx 1 root root 0 Apr  9 12:09
/sys/bus/pci/devices/0000:01:00.1/virtfn0 -> ../0000:02:10.1