[dpdk-users] PF link status is not getting detected correctly by dpdk driver in VM

[Tushar Mulkar]

I think the IX710 device doesn't support the Link Change Interrupt. I have
enabled the debug traces and I could see following in the messages


Jan 10 02:07:53 <hostname>  packet-forwarding[1518]: rte_eth_dev_configure:
driver net_i40e_vf does not support lsc


Also I could verify that the virtual function bound to kernel (i.e. i40evf
) is able to detect the link failure in the PF.


Tushar



On Wed, Jan 10, 2018 at 12:18 PM, Tushar Mulkar <tusharmulkar at gmail.com>
wrote:

> Hi All,
>
>    I am using "Ethernet Controller X710 for 10GbE SFP+" SRIOV NIC card on
> the host with 8 VFs. Out of these VFs two VFs are associated with a VM, one
> VF is bound to Linux kernel driver i40evf and another is bound to dpdk pmd
> i.e. igb_uio.
>    when there is a link fault on the  hardware nic, the fault is not
> detected for the VF that is bound to dpdk. Instead it is detecting medium
> change from 10GBase-SR to 100BASE-TXFD. Is there any configuration, that
> will allow me to detect the link state on hardware NIC in the VM ?
>
>    Basically I want to get the Link change notification on the dpdk
> application in VM.
>
>    I tried to register for the link state change interrupt but the
> "rte_eth_dev_configure" fails with error code -22
>
>    I believe link-state auto actually means replicate PF link-state to VF
>    Current Config :
>
>
>    [root at ironman <https://dpdk.org/ml/listinfo/dev> tmp]# ip link show p2p2
>     34: p2p2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP
> mode DEFAULT qlen 1000
>      link/ether xx:xx:xx:xx:xx:xx brd ff:ff:ff:ff:ff:ff
>     vf 0 MAC xx:xx:xx:xx:xx:01, spoof checking on, link-state auto, trust off
>     vf 1 MAC xx:xx:xx:xx:xx:02, spoof checking on, link-state auto, trust off
>     vf 2 MAC xx:xx:xx:xx:xx:03, spoof checking on, link-state auto, trust off
>     vf 3 MAC 00:00:00:00:00:00, spoof checking on, link-state auto, trust off
>     vf 4 MAC 00:00:00:00:00:00, spoof checking on, link-state auto, trust off
>     vf 5 MAC 00:00:00:00:00:00, spoof checking on, link-state auto, trust off
>     vf 6 MAC 00:00:00:00:00:00, spoof checking on, link-state auto, trust off
>     vf 7 MAC 00:00:00:00:00:00, spoof checking on, link-state auto, trust off
>
>
> Regards,
> Tushar
>
>