Subject: Re: linux-next20240208: tg3 driver nw interfaces not getting configured

From: "Aithal, Srikanth" <[email-masked]>
Date: Fri, 9 Feb 2024 09:28:29 +0530

On 2/9/2024 3:48 AM, Heiner Kallweit wrote:
> On 08.02.2024 16:28, Aithal, Srikanth wrote:
>> On 2/8/2024 7:32 PM, Heiner Kallweit wrote:
>>> On 08.02.2024 12:05, Aithal, Srikanth wrote:
>>>> On 2/8/2024 4:16 PM, Heiner Kallweit wrote:
>>>>> On 08.02.2024 09:30, Aithal, Srikanth wrote:
>>>>>> Hi,
>>>>>>
>>>>>> On 6.8.0-rc3-next-20240208, the network interfaces are not getting configured.
>>>>>>
>>>>> Thanks for the report. Could you please elaborate on what "not getting
>>>>> configured" means in detail?
>>>>> - Any error in any log?
>>>>> - Any other error message?
>>>>> - Interface doesn't come up or which specific configuration are you missing?
>>>>>
>>>> I am not seeing any errors in the dmesg,
>>>>
>>>> [    4.019383] tg3 0000:c1:00.0 eth0: Tigon3 [partno(BCM95720) rev 5720000] (PCI Express) MAC address d0:8e:79:bb:95:90
>>>> [    4.019391] tg3 0000:c1:00.0 eth0: attached PHY is 5720C (10/100/1000Base-T Ethernet) (WireSpeed[1], EEE[1])
>>>> [    4.019394] tg3 0000:c1:00.0 eth0: RXcsums[1] LinkChgREG[0] MIirq[0] ASF[1] TSOcap[1]
>>>> [    4.019397] tg3 0000:c1:00.0 eth0: dma_rwctrl[00000001] dma_mask[64-bit]
>>>> [    4.041082] tg3 0000:c1:00.1 eth1: Tigon3 [partno(BCM95720) rev 5720000] (PCI Express) MAC address d0:8e:79:bb:95:91
>>>> [    4.041087] tg3 0000:c1:00.1 eth1: attached PHY is 5720C (10/100/1000Base-T Ethernet) (WireSpeed[1], EEE[1])
>>>> [    4.041090] tg3 0000:c1:00.1 eth1: RXcsums[1] LinkChgREG[0] MIirq[0] ASF[1] TSOcap[1]
>>>> [    4.041092] tg3 0000:c1:00.1 eth1: dma_rwctrl[00000001] dma_mask[64-bit]
>>>> [    4.077483] tg3 0000:c1:00.1 eno8403: renamed from eth1
>>>> [    4.124657] tg3 0000:c1:00.0 eno8303: renamed from eth0
>>>>
>>>> nmcli says interfaces are disconnected:
>>>>
>>>> [root@localhost ~]# nmcli
>>>> eno8303: disconnected
>>>>           "Broadcom and subsidiaries NetXtreme BCM5720"
>>>>           ethernet (tg3), D0:8E:79:BB:95:90, hw, mtu 1500
>>>>
>>>> eno8403: disconnected
>>>>           "Broadcom and subsidiaries NetXtreme BCM5720"
>>>>           ethernet (tg3), D0:8E:79:BB:95:91, hw, mtu 1500
>>>>
>>>> I am attaching host dmesg.
>>>>
>>>
>>> Thanks. dmesg lists no error. Please send output from the following commands.
>>>
>>> ip link
>> 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1000
>>      link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
>> 2: eno8303: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc mq state DOWN mode DEFAULT group default qlen 1000
>>      link/ether d0:8e:79:bb:95:90 brd ff:ff:ff:ff:ff:ff
>>      altname enp193s0f0
>> 3: eno8403: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc mq state DOWN mode DEFAULT group default qlen 1000
>>      link/ether d0:8e:79:bb:95:91 brd ff:ff:ff:ff:ff:ff
>>      altname enp193s0f1
>>
>>> ethtool <if>
>> Settings for eno8303:
>>          Supported ports: [ TP ]
>>          Supported link modes:   10baseT/Half 10baseT/Full
>>                                  100baseT/Half 100baseT/Full
>>                                  1000baseT/Half 1000baseT/Full
>>          Supported pause frame use: No
>>          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: No
>>          Advertised auto-negotiation: Yes
>>          Advertised FEC modes: Not reported
>>          Speed: Unknown!
>>          Duplex: Unknown! (255)
>>          Auto-negotiation: on
>>          Port: Twisted Pair
>>          PHYAD: 1
>>          Transceiver: internal
>>          MDI-X: Unknown
>>          Supports Wake-on: g
>>          Wake-on: d
>>          Current message level: 0x000000ff (255)
>>                                 drv probe link timer ifdown ifup rx_err tx_err
>>          Link detected: no
>>
>> Settings for eno8403:
>>          Supported ports: [ TP ]
>>          Supported link modes:   10baseT/Half 10baseT/Full
>>                                  100baseT/Half 100baseT/Full
>>                                  1000baseT/Half 1000baseT/Full
>>          Supported pause frame use: No
>>          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: No
>>          Advertised auto-negotiation: Yes
>>          Advertised FEC modes: Not reported
>>          Speed: Unknown!
>>          Duplex: Unknown! (255)
>>          Auto-negotiation: on
>>          Port: Twisted Pair
>>          PHYAD: 2
>>          Transceiver: internal
>>          MDI-X: Unknown
>>          Supports Wake-on: g
>>          Wake-on: d
>>          Current message level: 0x000000ff (255)
>>                                 drv probe link timer ifdown ifup rx_err tx_err
>>          Link detected: no
>>
>>> ethtool --show-eee <if>
>> EEE settings for eno8403:
>>          EEE status: enabled - inactive
>>          Tx LPI: 2047 (us)
>>          Supported EEE link modes:  100baseT/Full
>>                                     1000baseT/Full
>>          Advertised EEE link modes:  100baseT/Full
>>                                      1000baseT/Full
>>          Link partner advertised EEE link modes:  Not reported
>>
>> EEE settings for eno8303:
>>          EEE status: enabled - inactive
>>          Tx LPI: 2047 (us)
>>          Supported EEE link modes:  100baseT/Full
>>                                     1000baseT/Full
>>          Advertised EEE link modes:  100baseT/Full
>>                                      1000baseT/Full
>>          Link partner advertised EEE link modes:  Not reported
>>
>>>
>>> If the interfaces aren't up, please try to bring them up manually and see what happens.
>>> ip link set <if> up
>> Nothing happens.
>> [root@localhost ~]# ip link set eno8303 up
>> [root@localhost ~]# ip link set eno8403 up
>> [root@localhost ~]# ip link
>> 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1000
>>      link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
>> 2: eno8303: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc mq state DOWN mode DEFAULT group default qlen 1000
>>      link/ether d0:8e:79:bb:95:90 brd ff:ff:ff:ff:ff:ff
>>      altname enp193s0f0
>> 3: eno8403: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc mq state DOWN mode DEFAULT group default qlen 1000
>>      link/ether d0:8e:79:bb:95:91 brd ff:ff:ff:ff:ff:ff
>>      altname enp193s0f1
>>
>>>
>>>
>>>>>> I have 'NetXtreme BCM5720 Gigabit Ethernet PCIe'
>>>>>>           configuration: autonegotiation=on broadcast=yes driver=tg3
>>>>>>
>>>>>> If I revert below commit I am able to get back the interfaces mentioned.
>>>>>>
>>>>>> commit 9bc791341bc9a5c22b94889aa37993bb69faa317
>>>>>> Author: Heiner Kallweit <[email-masked]>
>>>>>> Date:   Sat Feb 3 22:12:50 2024 +0100
>>>>>>
>>>>>>        tg3: convert EEE handling to use linkmode bitmaps
>>>>>>
>>>>>>        Convert EEE handling to use linkmode bitmaps. This prepares for
>>>>>>        removing the legacy bitmaps from struct ethtool_keee.
>>>>>>        No functional change intended.
>>>>>>
>>>>>>        Note: The change to mii_eee_cap1_mod_linkmode_t(tp->eee.advertised, val)
>>>>>>        in tg3_phy_autoneg_cfg() isn't completely obvious, but it doesn't change
>>>>>>        the current functionality.
>>>>>>
>>>>>>        Signed-off-by: Heiner Kallweit <[email-masked]>
>>>>>>        Reviewed-by: Andrew Lunn <[email-masked]>
>>>>>>        Link: https://lore.kernel.org/r/[email-masked]
>>>>>>        Signed-off-by: Jakub Kicinski <[email-masked]>
>>>>>>
>>>>>>
>>>>>> The same works fine on 6.8.0-rc3-next-20240207.
>>>>>>
>>>>>> Thanks,
>>>>>> Srikanth Aithal
>>>>>> [email-masked]
>>>>> Heiner
>>>
>>
> 
> Could you please test whether the following fixes the issue for you?
> 
> The uninitialized struct ethtool_keee causes the bug because
> mii_eee_cap1_mod_linkmode_t() leaves unknown bits as-is.
> 
> ---
>   drivers/net/ethernet/broadcom/tg3.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/net/ethernet/broadcom/tg3.c b/drivers/net/ethernet/broadcom/tg3.c
> index 50f674031..7d0a2f5f3 100644
> --- a/drivers/net/ethernet/broadcom/tg3.c
> +++ b/drivers/net/ethernet/broadcom/tg3.c
> @@ -4616,7 +4616,7 @@ static int tg3_init_5401phy_dsp(struct tg3 *tp)
>   
>   static bool tg3_phy_eee_config_ok(struct tg3 *tp)
>   {
> -	struct ethtool_keee eee;
> +	struct ethtool_keee eee = {};
>   
>   	if (!(tp->phy_flags & TG3_PHYFLG_EEE_CAP))
>   		return true;

This fix on top of next20240208 resolves the issue. Thank you.

Tested-by: Srikanth Aithal <[email-masked]>