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Message-ID: <BN0PR08MB6951015C28F25C9B7E011ADA83D19@BN0PR08MB6951.namprd08.prod.outlook.com>
Date: Wed, 18 May 2022 18:58:31 +0000
From: "Pighin, Anthony (Nokia - CA/Ottawa)" <anthony.pighin@...ia.com>
To: "thomas.lendacky@....com" <thomas.lendacky@....com>
CC: "netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: PROBLEM: XGBE unable to autoneg when advertising only 1GbE KX mode
Tested on Linux 5.15.22.
Step 1. Force (both sides) of the Link to advertise 1000baseKX/Full only
root@...alhost:~# ethtool --change bp3 advertise 0x20000
root@...alhost:~# ethtool bp3
Settings for bp3:
Supported ports: [ Backplane ]
Supported link modes: 1000baseKX/Full
10000baseKR/Full
10000baseR_FEC
Supported pause frame use: Symmetric Receive-only
Supports auto-negotiation: Yes
Supported FEC modes: Not reported
Advertised link modes: 1000baseKX/Full
Advertised pause frame use: No
Advertised auto-negotiation: Yes
Advertised FEC modes: Not reported
Speed: Unknown!
Duplex: Unknown! (255)
Port: None
PHYAD: 0
Transceiver: internal
Auto-negotiation: on
Current message level: 0x00000034 (52)
link ifdown ifup
Link detected: no
Step 2. Bring Up both sides of the Link:
root@...alhost:~# ip link set bp3 up
Result. Link stays Down:
root@...alhost:~# ethtool bp3
Settings for bp3:
Supported ports: [ Backplane ]
Supported link modes: 1000baseKX/Full
10000baseKR/Full
10000baseR_FEC
Supported pause frame use: Symmetric Receive-only
Supports auto-negotiation: Yes
Supported FEC modes: Not reported
Advertised link modes: 1000baseKX/Full
Advertised pause frame use: No
Advertised auto-negotiation: Yes
Advertised FEC modes: Not reported
Link partner advertised link modes: Not reported
Link partner advertised pause frame use: No
Link partner advertised auto-negotiation: Yes
Link partner advertised FEC modes: Not reported
Speed: Unknown!
Duplex: Full
Port: None
PHYAD: 0
Transceiver: internal
Auto-negotiation: on
Current message level: 0x00000034 (52)
link ifdown ifup
Link detected: no
Step 3. Change one side of the Link to advertise 1000baseKX/Full and 10000baseKR/Full:
root@...alhost:~# ethtool --change bp3 advertise 0xa000
Result: Link comes Up at 1000baseKX/Full:
root@...alhost:~# ethtool bp3
Settings for bp3:
Supported ports: [ Backplane ]
Supported link modes: 1000baseKX/Full
10000baseKR/Full
10000baseR_FEC
Supported pause frame use: Symmetric Receive-only
Supports auto-negotiation: Yes
Supported FEC modes: Not reported
Advertised link modes: 1000baseKX/Full
10000baseKR/Full
Advertised pause frame use: No
Advertised auto-negotiation: Yes
Advertised FEC modes: Not reported
Link partner advertised link modes: 1000baseKX/Full
Link partner advertised pause frame use: No
Link partner advertised auto-negotiation: Yes
Link partner advertised FEC modes: Not reported
Speed: 1000Mb/s
Duplex: Full
Port: None
PHYAD: 0
Transceiver: internal
Auto-negotiation: on
Current message level: 0x00000034 (52)
link ifdown ifup
Link detected: yes
Logs during initial Link up failures (when only advertising 1000baseKX/Full):
[ 581.429431] xgbe_isr_task:493: amd-xgbe 0000:0d:00.7 bp3: DMA_ISR=0x00020000
[ 581.429437] xgbe_isr_task:542: amd-xgbe 0000:0d:00.7 bp3: MAC_ISR=0x03000001
[ 581.429722] xgbe_isr_task:493: amd-xgbe 0000:0d:00.7 bp3: DMA_ISR=0x00020000
[ 581.429724] xgbe_isr_task:542: amd-xgbe 0000:0d:00.7 bp3: MAC_ISR=0x02000001
[ 581.542950] xgbe_isr_task:493: amd-xgbe 0000:0d:00.7 bp3: DMA_ISR=0x00020000
[ 581.542954] xgbe_isr_task:542: amd-xgbe 0000:0d:00.7 bp3: MAC_ISR=0x00000001
[ 581.661399] xgbe_check_link_timeout:1292: amd-xgbe 0000:0d:00.7 bp3: AN link timeout
[ 581.661403] __xgbe_phy_config_aneg:1214: amd-xgbe 0000:0d:00.7 bp3: AN PHY configuration
[ 581.663591] xgbe_phy_kx_1000_mode:2160: amd-xgbe 0000:0d:00.7 bp3: 1GbE KX mode set
[ 581.663602] xgbe_an73_disable:422: amd-xgbe 0000:0d:00.7 bp3: CL73 AN disabled
[ 581.663618] xgbe_an37_disable:381: amd-xgbe 0000:0d:00.7 bp3: CL37 AN disabled
[ 581.663639] xgbe_an73_init:1051: amd-xgbe 0000:0d:00.7 bp3: CL73 AN initialized
[ 581.663650] xgbe_an73_restart:412: amd-xgbe 0000:0d:00.7 bp3: CL73 AN enabled/restarted
[ 581.763656] xgbe_an_isr_task:695: amd-xgbe 0000:0d:00.7 bp3: AN interrupt received
[ 581.763672] xgbe_an73_state_machine:847: amd-xgbe 0000:0d:00.7 bp3: CL73 AN Incompatible-Link
[ 581.763676] xgbe_an73_state_machine:907: amd-xgbe 0000:0d:00.7 bp3: CL73 AN result: No-Link
[ 581.763682] xgbe_isr_task:493: amd-xgbe 0000:0d:00.7 bp3: DMA_ISR=0x00020000
[ 581.763685] xgbe_isr_task:542: amd-xgbe 0000:0d:00.7 bp3: MAC_ISR=0x02000001
[ 581.764848] xgbe_isr_task:493: amd-xgbe 0000:0d:00.7 bp3: DMA_ISR=0x00020000
[ 581.764851] xgbe_isr_task:542: amd-xgbe 0000:0d:00.7 bp3: MAC_ISR=0x03000001
[ 581.765865] xgbe_isr_task:493: amd-xgbe 0000:0d:00.7 bp3: DMA_ISR=0x00020000
[ 581.765867] xgbe_isr_task:542: amd-xgbe 0000:0d:00.7 bp3: MAC_ISR=0x02000001
[ 581.766258] xgbe_isr_task:493: amd-xgbe 0000:0d:00.7 bp3: DMA_ISR=0x00020000
[ 581.766260] xgbe_isr_task:542: amd-xgbe 0000:0d:00.7 bp3: MAC_ISR=0x03000001
[ 581.767364] xgbe_phy_kr_mode:2132: amd-xgbe 0000:0d:00.7 bp3: 10GbE KR mode set
[ 581.767593] xgbe_isr_task:493: amd-xgbe 0000:0d:00.7 bp3: DMA_ISR=0x00020000
[ 581.767596] xgbe_isr_task:542: amd-xgbe 0000:0d:00.7 bp3: MAC_ISR=0x02000001
[ 581.769699] xgbe_phy_power_off:2053: amd-xgbe 0000:0d:00.7 bp3: phy powered off
[ 581.772065] xgbe_isr_task:493: amd-xgbe 0000:0d:00.7 bp3: DMA_ISR=0x00020000
[ 581.772068] xgbe_isr_task:542: amd-xgbe 0000:0d:00.7 bp3: MAC_ISR=0x03000001
[ 581.773534] xgbe_isr_task:493: amd-xgbe 0000:0d:00.7 bp3: DMA_ISR=0x00020000
[ 581.773537] xgbe_isr_task:542: amd-xgbe 0000:0d:00.7 bp3: MAC_ISR=0x02000001
[ 581.773593] xgbe_phy_kr_mode:2132: amd-xgbe 0000:0d:00.7 bp3: 10GbE KR mode set
[ 581.773604] xgbe_an73_disable:422: amd-xgbe 0000:0d:00.7 bp3: CL73 AN disabled
[ 581.773619] xgbe_an37_disable:381: amd-xgbe 0000:0d:00.7 bp3: CL37 AN disabled
[ 581.773626] xgbe_an73_state_machine:913: amd-xgbe 0000:0d:00.7 bp3: PHY Reset
[ 581.773628] xgbe_an73_state_machine:847: amd-xgbe 0000:0d:00.7 bp3: CL73 AN Ready
[ 581.773723] xgbe_isr_task:493: amd-xgbe 0000:0d:00.7 bp3: DMA_ISR=0x00020000
[ 581.773726] xgbe_isr_task:542: amd-xgbe 0000:0d:00.7 bp3: MAC_ISR=0x00000001
Anthony
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