Heya!
I have noticed that with sun7i-dwmac driver (OLinuxino Lime2 eMMC), link
detection fails consistently with certain 1000Mbit partners (for example Huawei
B525s-23a 4g modem ethernet outputs and RTL8153-based USB3.0 ethernet dongle),
but the same hardware works properly with certain other link partners (100Mbit
GL AR150
for example).
(Just need to test with another 1000Mbit switch at the office).
I first thought it could be a regression, but I went from current master to as
far back
as 5.2.0-rc6 where it was still broken.
Failure is basically following:
[ 10.971485] sun7i-dwmac 1c50000.ethernet eth0: PHY [stmmac-0:01] driver
[Generic PHY]
[ 10.980841] sun7i-dwmac 1c50000.ethernet eth0: No Safety Features support
found
[ 10.988291] sun7i-dwmac 1c50000.ethernet eth0: RX IPC Checksum Offload
disabled
[ 10.995694] sun7i-dwmac 1c50000.ethernet eth0: No MAC Management Counters
available
[ 11.003381] sun7i-dwmac 1c50000.ethernet eth0: PTP not supported by HW
[ 11.009927] sun7i-dwmac 1c50000.ethernet eth0: configuring for phy/rgmii
link mode
... link and activity leds go blank ...
... remove and replug and link is detected again ...
[ 19.371894] sun7i-dwmac 1c50000.ethernet eth0: Link is Up - 1Gbps/Full -
flow control rx/tx
Ethtool output in case link is down:
[snip]
Supported ports: [ TP MII ]
Supported link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Half 1000baseT/Full
Supported pause frame use: Symmetric Receive-only
Supports auto-negotiation: Yes
Supported FEC modes: Not reported
Advertised link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Half 1000baseT/Full
Advertised pause frame use: Symmetric Receive-only
Advertised auto-negotiation: Yes
Advertised FEC modes: Not reported
Speed: Unknown!
Duplex: Unknown! (255)
Port: MII
PHYAD: 1
Transceiver: internal
Auto-negotiation: on
Supports Wake-on: d
Wake-on: d
Current message level: 0x0000003f (63)
drv probe link timer ifdown ifup
Link detected: no
[/snip]
And ethtool output in case cable is removed and replugged:
[snip]
ethtool eth0
Settings for eth0:
...cut...
Advertised pause frame use: Symmetric Receive-only
Advertised auto-negotiation: Yes
Advertised FEC modes: Not reported
Link partner advertised link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Full
Link partner advertised pause frame use: Symmetric
Link partner advertised auto-negotiation: Yes
Link partner advertised FEC modes: Not reported
Speed: 1000Mb/s
Duplex: Full
Port: MII
PHYAD: 1
Transceiver: internal
Auto-negotiation: on
Supports Wake-on: d
Wake-on: d
Current message level: 0x0000003f (63)
drv probe link timer ifdown ifup
Link detected: yes
[/snip]
With 100Mbit link partner (GL Inet AR150), the link is pulled up almost
immediately:
[ 15.531754] sun7i-dwmac 1c50000.ethernet eth0: Link is Up - 100Mbps/Full -
flow control rx/tx
[snip]
Settings for eth0:
... cut ...
Link partner advertised link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
Link partner advertised pause frame use: Symmetric Receive-only
Link partner advertised auto-negotiation: Yes
Link partner advertised FEC modes: Not reported
Speed: 100Mb/s
Duplex: Full
Port: MII
PHYAD: 1
Transceiver: internal
Auto-negotiation: on
Supports Wake-on: d
Wake-on: d
Current message level: 0x0000003f (63)
drv probe link timer ifdown ifup
Link detected: yes
[/snip]
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