Intel x553 hot swap of SFP 10G/1G causes link down and unknown speed

Intel x553 hot swap of SFP 10G/1G causes link down and unknown speed

[Prasanna Panchamukhi]

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Hot swap of  SFPs 10G/1G current is not support on Intel x553 controller
with dpdk 21.11.3


CPU  Intel(R) Atom(TM) CPU C3558R @ 2.40GHz

x553 ports bond to dpdk inserted with 10G and 1G SFPs

# lspci


07:00.0 *Ether*net controller: Intel Corporation *Ether*net Connection X553
10 GbE SFP+ (rev 11)

07:00.1 *Ether*net controller: Intel Corporation *Ether*net Connection X553
10 GbE SFP+ (rev 11)


# /usr/share/dpdk/tools/dpdk-devbind.py --status


Network devices using DPDK-compatible driver

============================================

0

0000:07:00.0 'Ethernet Connection X553 10 GbE SFP+ 15c4' drv=vfio-pci
unused=

0000:07:00.1 'Ethernet Connection X553 10 GbE SFP+ 15c4' drv=vfio-pci

unused=



 et7   Driver PMDPort  HWaddr cc:1a:a3:ff:ea:e9 MTU 9236

        Speed 1,000Mbps Link UP  Duplex FULL Autoneg ON

        RX Queues: 1   RX Queue size: 4096

        TX Queues: 1   TX Queue Size: 1024

    Inc/RX packets: 22,327       bytes: 23,925,237

        dropped: 0

    Out/TX packets: 22,352       bytes: 23,924,291

        dropped: 0


et6   Driver PMDPort  HWaddr cc:1a:a3:ff:ea:e9 MTU 9236

        Speed 10,000Mbps Link UP  Duplex FULL Autoneg ON

        RX Queues: 1   RX Queue size: 4096

        TX Queues: 1   TX Queue Size: 1024

    Inc/RX packets: 2,798,567,431   bytes: 4,186,656,722,403

        dropped: 0

    Out/TX packets: 523,462,096    bytes: 783,087,633,300

        dropped: 28,382



Swap the SFPs with the cable between port6 and port 7.



et7   Driver PMDPort  HWaddr cc:1a:a3:ff:ea:e9 MTU 9236

        Speed UNKNOWN  Link DOWN Duplex HALF Autoneg ON

        RX Queues: 1   RX Queue size: 4096

        TX Queues: 1   TX Queue Size: 1024

    Inc/RX packets: 22,327       bytes: 23,925,237

        dropped: 0

    Out/TX packets: 22,362       bytes: 23,924,891

        dropped: 0

et7   Driver PMDPort  HWaddr cc:1a:a3:ff:ea:e9 MTU 9236

        Speed UNKNOWN  Link DOWN Duplex HALF Autoneg ON

        RX Queues: 1   RX Queue size: 4096

        TX Queues: 1   TX Queue Size: 1024

    Inc/RX packets: 22,327       bytes: 23,925,237

        dropped: 0

    Out/TX packets: 22,362       bytes: 23,924,891

        dropped: 0



Same experiment with Linux ixgbe kernel driver and on hotswap on SFPs both
link and speed were correctly reported. Logs below:




I saw some patches in the archives posted in 2021 which did not make it to
the upstream release that support these features by Stephen.


https://mails.dpdk.org/archives/dev/2021-December/230965.html


Is there a plan to support this feature dpdk like linux kernel ixgbe driver
?


Thanks,

Prasanna

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