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

[Tushar Mulkar <tusharmulkar@gmail.com>]

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