[ovs-discuss] [ovs-dev] adding dpdk ports sharing same pci address to ovs-dpdk bridge

[devendra rawat]

Hi Kevin,

On Fri, Sep 8, 2017 at 12:24 AM, Kevin Traynor <ktraynor at redhat.com> wrote:

> On 09/07/2017 06:47 PM, Darrell Ball wrote:
> > Adding discuss at openvswitch.org
> >
> > The related changes went into 2.7
> >
> >
> >
> > On 9/7/17, 3:51 AM, "ovs-dev-bounces at openvswitch.org on behalf of
> devendra rawat" <ovs-dev-bounces at openvswitch.org on behalf of
> devendra.rawat.singh at gmail.com> wrote:
> >
> >     Hi,
> >
> >     I have compiled and built ovs-dpdk using DPDK v17.08 and OVS v2.8.0.
> The
> >     NIC that I am using is Mellanox ConnectX-3 Pro, which is a dual port
> 10G
> >     NIC. The problem with this NIC is that it provides only one PCI
> address for
> >     both the 10G ports.
> >
> >     So when I am trying to add the two DPDK ports to my br0 bridge
> >
> >     # ovs-vsctl --no-wait add-port br0 dpdk0 -- set Interface dpdk0
> type=dpdk
> >     options:dpdk-devargs=0002:01:00.0
> >
> >     # ovs-vsctl --no-wait add-port br0 dpdk1 -- set Interface dpdk1
> type=dpdk
> >     options:dpdk-devargs=0002:01:00.0
> >
>
> Were you able to confirm those addresses by running ./dpdk-devbind.py -s
> in your <dpdk_src>/tools dir?
>

On running dpdk-devbind.py --status , I can see the ConnectX-3 pro NIC,
having only one PCI address.

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

Network devices using kernel driver
===================================
0002:01:00.0 'MT27520 Family [ConnectX-3 Pro] 1007' if=enP4p1s0d1,enP4p1s0
drv=mlx4_core unused=
0006:01:00.0 'I210 Gigabit Network Connection 1533' if=enP6p1s0 drv=igb
unused= *Active*



>     The port dpdk1 is added successfully and able to transfer data, but
adding
>     dpdk0 to br0 fails:
>
>     2017-09-06T14:19:20Z|00045|netdev_dpdk|INFO|Port 0: e4:1d:2d:4f:78:60
>     2017-09-06T14:19:20Z|00046|bridge|INFO|bridge br0: added interface
dpdk1 on
>     port 1
>     2017-09-06T14:19:20Z|00047|bridge|INFO|bridge br0: added interface
br0 on
>     port 65534
>     2017-09-06T14:19:20Z|00048|dpif_netlink|WARN|Generic Netlink family
>     'ovs_datapath' does not exist. The Open vSwitch kernel module is
probably
>     not loaded.
>     2017-09-06T14:19:20Z|00049|netdev_dpdk|WARN|'dpdk0' is trying to use
device
>     '0002:01:00.0' which is already in use by 'dpdk1'
>     2017-09-06T14:19:20Z|00050|netdev|WARN|dpdk0: could not set
configuration
>     (Address already in use)
>     2017-09-06T14:19:20Z|00051|bridge|INFO|bridge br0: using datapath ID
>     0000e41d2d4f7860
>
>
>     With OVS v2.6.1 I never had this problem as dpdk-devargs was not
mandatory
>     and just specifying port name was enough to add that port to bridge.
>
>     Is there a way to add port both ports to bridge ?
>
>     Thanks,
>     Devendra
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