i354 autoneg-off link issue

[ASath1]

Hi,

I am observing a strange issue with i354 when auto-negotiation is turned off.

The device I have has 6 ethernet ports. Port 1 and 2 are based on i210 and port

3 to 6 are based on i354 (connected thru an external PHY). The CPU is Atom

Rangeley (4 core).

I have connected ports 3 and 4 back to back with an external cable. When the link is forced to 100M/Full duplex with auto-negotiation off on both the ports, the link does not come up.Whereas the link comes up fine when eth3 (i354) and eth1 (i210) are connected back to back and forced to 100M/Full duplex with auto-negotiation off.This issue is seen with DPDK (16.04) and also linux kernel (ubuntu 14.04).Is this a known issue ?Following are logs when running the test using ethtool from linuxadmin@Ananda-Desk:~$ lspci | grep Ethernet00:14.0 Ethernet controller: Intel Corporation Ethernet Connection I354 (rev 03) - eth200:14.1 Ethernet controller: Intel Corporation Ethernet Connection I354 (rev 03) - eth300:14.2 Ethernet controller: Intel Corporation Ethernet Connection I354 (rev 03) - eth400:14.3 Ethernet controller: Intel Corporation Ethernet Connection I354 (rev 03) - eth501:00.0 Ethernet controller: Intel Corporation I210 Gigabit Network Connection (rev 03) - eth002:00.0 Ethernet controller: Intel Corporation I210 Gigabit Network Connection (rev 03) - eth1admin@Ananda-Desk:~$ ethtool -i eth3driver: igbversion: 5.2.13-kfirmware-version: 0.0.0bus-info: 0000:00:14.1supports-statistics: yessupports-test: yessupports-eeprom-access: yessupports-register-dump: yessupports-priv-flags: no[Force 100M/Full on eth3]admin@Ananda-Desk:~$ sudo ethtool -s eth3 autoneg off duplex full speed 100admin@Ananda-Desk:~$ ethtool eth3Settings for eth3: Supported ports: [ TP ] Supported link modes: 10baseT/Half 10baseT/Full 100baseT/Half 100baseT/Full 1000baseT/Full Supported pause frame use: Symmetric Supports auto-negotiation: Yes Advertised link modes: Not reported Advertised pause frame use: Symmetric Advertised auto-negotiation: No Speed: 100Mb/s Duplex: Full Port: Twisted Pair PHYAD: 1 Transceiver: internal Auto-negotiation: off MDI-X: off (auto)Cannot get wake-on-lan settings: Operation not permitted Current message level: 0x00000007 (7) drv probe link Link detected: yesadmin@Ananda-Desk:~$ ethtool eth4Settings for eth4: Supported ports: [ TP ] Supported link modes: 10baseT/Half 10baseT/Full 100baseT/Half 100baseT/Full 1000baseT/Full Supported pause frame use: Symmetric Supports auto-negotiation: Yes Advertised link modes: 10baseT/Half 10baseT/Full 100baseT/Half 100baseT/Full 1000baseT/Full Advertised pause frame use: Symmetric Advertised auto-negotiation: Yes Speed: 100Mb/s Duplex: Half Port: Twisted Pair PHYAD: 2 Transceiver: internal Auto-negotiation: on MDI-X: on (auto)Cannot get wake-on-lan settings: Operation not permitted Current message level: 0x00000007 (7) drv probe link Link detected: yes[Force 100M/Full on eth4]admin@Ananda-Desk:~$ sudo ethtool -s eth4 autoneg off duplex full speed 100admin@Ananda-Desk:~$admin@Ananda-Desk:~$ ethtool eth4Settings for eth4: Supported ports: [ TP ] Supported link modes: 10baseT/Half 10baseT/Full 100baseT/Half 100baseT/Full 1000baseT/Full Supported pause frame use: Symmetric Supports auto-negotiation: Yes Advertised link modes: Not reported Advertised pause frame use: Symmetric Advertised auto-negotiation: No Speed: Unknown! Duplex: Unknown! (255) Port: Twisted Pair PHYAD: 2 Transceiver: internal Auto-negotiation: off MDI-X: on (auto)Cannot get wake-on-lan settings: Operation not permitted Current message level: 0x00000007 (7) drv probe link Link detected: no <<<<<<<<<<<<<<<p> admin@Ananda-Desk:~$ ethtool eth3Settings for eth3: Supported ports: [ TP ] Supported link modes: 10baseT/Half 10baseT/Full 100baseT/Half 100baseT/Full 1000baseT/Full

XXXWHITESPACEXX...

[AlHill]

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