Re: [dpdk-dev] [Dpdk-ovs] problem in binding interfaces of virtio-pci on the VM

["Polehn, Mike A" <mike.a.polehn@intel.com>]

In this example, the control network 00:03.0, remains unbound to UIO driver but remains attached
 to Linux device driver (ssh access with putty) and just the target interfaces are bound.
Below, it shows all 3 interfaces bound to the uio driver, which are not usable until a task uses the UIO driver. 

[root@F21vm l3fwd-vf]# lspci -nn
00:00.0 Host bridge [0600]: Intel Corporation 440FX - 82441FX PMC [Natoma] [8086:1237] (rev 02)
00:01.0 ISA bridge [0601]: Intel Corporation 82371SB PIIX3 ISA [Natoma/Triton II] [8086:7000]
00:01.1 IDE interface [0101]: Intel Corporation 82371SB PIIX3 IDE [Natoma/Triton II] [8086:7010]
00:01.3 Bridge [0680]: Intel Corporation 82371AB/EB/MB PIIX4 ACPI [8086:7113] (rev 03)
00:02.0 VGA compatible controller [0300]: Cirrus Logic GD 5446 [1013:00b8]
00:03.0 Ethernet controller [0200]: Red Hat, Inc Virtio network device [1af4:1000]
00:04.0 Ethernet controller [0200]: Intel Corporation XL710/X710 Virtual Function [8086:154c] (rev 01)
00:05.0 Ethernet controller [0200]: Intel Corporation XL710/X710 Virtual Function [8086:154c] (rev 01)

[root@F21vm l3fwd-vf]# /usr/src/dpdk/tools/dpdk_nic_bind.py --bind=igb_uio 00:04.0
[root@F21vm l3fwd-vf]# /usr/src/dpdk/tools/dpdk_nic_bind.py --bind=igb_uio 00:05.0
[root@F21vm l3fwd-vf]# /usr/src/dpdk/tools/dpdk_nic_bind.py --status

Network devices using DPDK-compatible driver
============================================
0000:00:04.0 'XL710/X710 Virtual Function' drv=igb_uio unused=i40evf
0000:00:05.0 'XL710/X710 Virtual Function' drv=igb_uio unused=i40evf

Network devices using kernel driver
===================================
0000:00:03.0 'Virtio network device' if= drv=virtio-pci unused=virtio_pci,igb_uio

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

-----Original Message-----
From: Dpdk-ovs [mailto:dpdk-ovs-bounces@lists.01.org] On Behalf Of Srinivasreddy R
Sent: Thursday, February 26, 2015 6:11 AM
To: dev@dpdk.org; dpdk-ovs@lists.01.org
Subject: [Dpdk-ovs] problem in binding interfaces of virtio-pci on the VM

hi ,
I have written sample program for usvhost  supported by ovdk.

i have initialized VM using the below command .
On the VM :

I am able to see two interfaces . and working fine with traffic in rawsocket mode .
my problem is when i bind the interfaces to pmd driver[ ibg_uio ] my virtual machine is getting hanged . and  i am not able to access it further .
now my question is . what may be the reason for the behavior . and how can in debug the root cause .
please help in finding out the problem .



 ./tools/dpdk_nic_bind.py --status

Network devices using DPDK-compatible driver ============================================
<none>

Network devices using kernel driver
===================================
0000:00:03.0 '82540EM Gigabit Ethernet Controller' if=ens3 drv=e1000 unused=igb_uio *Active*
0000:00:04.0 'Virtio network device' if= drv=virtio-pci unused=igb_uio
0000:00:05.0 'Virtio network device' if= drv=virtio-pci unused=igb_uio

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


./dpdk_nic_bind.py --bind=igb_uio 00:04.0 00:05.0



./x86_64-softmmu/qemu-system-x86_64 -cpu host -boot c  -hda /home/utils/images/vm1.img  -m 2048M -smp 3 --enable-kvm -name 'VM1'
-nographic -vnc :1 -pidfile /tmp/vm1.pid -drive file=fat:rw:/tmp/qemu_share,snapshot=off -monitor unix:/tmp/vm1monitor,server,nowait  -net none -no-reboot -mem-path /dev/hugepages -mem-prealloc -netdev type=tap,id=net1,script=no,downscript=no,ifname=usvhost1,vhost=on -device virtio-net-pci,netdev=net1,mac=00:16:3e:00:03:03,csum=off,gso=off,guest_tso4=off,guest_tso6=off,guest_ecn=off
-netdev type=tap,id=net2,script=no,downscript=no,ifname=usvhost2,vhost=on
-device
virtio-net-pci,netdev=net2,mac=00:16:3e:00:03:04,csum=off,gso=off,guest_tso4=off,guest_tso6=off,guest_ecn=off




----------
thanks
srinivas.
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