Date:   Wed, 13 Nov 2019 13:58:30 +0000
From:   Rudolf Spring <rudolf.spring@...il.com>
To:     Siva Reddy Kallam <siva.kallam@...adcom.com>
Cc:     Michael Chan <michael.chan@...adcom.com>,
        Netdev <netdev@...r.kernel.org>
Subject: Re: Gentoo Linux 5.x - Tigon3

You should be able to reproduce it with the following conditions. Build a bridge interface and add only the tg3. Bridge config like this:

config_eth0=“null"
config_br0="192.168.1.1 netmask 255.255.255.0 brd 192.168.1.255"
bridge_br0=“eth0”

The computer should be configured as router and have a 2nd interface connected to the internet.
net.ipv4.ip_forward = 1

Access this Router from another computer and start downloading a large file and simultaneously browse the internet. Tg3 crashes instantly and repeatedly.

> On 13 Nov 2019, at 12:52, Rudolf Spring <rudolf.spring@...il.com> wrote:
> 
> The problem is annoying. Any suggestions.
> 
> This happens if I download a 5GB iso file and surf the internet simultaneously. I think I will go back to 4.19.  
> 
> [140077.602708] tg3 0000:01:00.0 eth0: Link is down
> [140077.886946] br0: port 1(eth0) entered disabled state
> [140081.391091] tg3 0000:01:00.0 eth0: Link is up at 1000 Mbps, full duplex
> [140081.391095] tg3 0000:01:00.0 eth0: Flow control is on for TX and on for RX
> [140081.391108] tg3 0000:01:00.0 eth0: EEE is enabled
> [140081.391132] br0: port 1(eth0) entered blocking state
> [140081.391134] br0: port 1(eth0) entered forwarding state
> [140617.773819] tg3 0000:01:00.0 eth0: Link is down
> [140618.059022] br0: port 1(eth0) entered disabled state
> [140621.542857] tg3 0000:01:00.0 eth0: Link is up at 1000 Mbps, full duplex
> [140621.542859] tg3 0000:01:00.0 eth0: Flow control is on for TX and on for RX
> [140621.542860] tg3 0000:01:00.0 eth0: EEE is enabled
> [140621.542872] br0: port 1(eth0) entered blocking state
> [140621.542874] br0: port 1(eth0) entered forwarding state
> [140688.432489] tg3 0000:01:00.0 eth0: Link is down
> [140688.717079] br0: port 1(eth0) entered disabled state
> [140692.181432] tg3 0000:01:00.0 eth0: Link is up at 1000 Mbps, full duplex
> [140692.181434] tg3 0000:01:00.0 eth0: Flow control is on for TX and on for RX
> [140692.181435] tg3 0000:01:00.0 eth0: EEE is enabled
> [140692.181447] br0: port 1(eth0) entered blocking state
> [140692.181449] br0: port 1(eth0) entered forwarding state
> [141381.695473] tg3 0000:01:00.0 eth0: Link is down
> [141381.979806] br0: port 1(eth0) entered disabled state
> [141385.484010] tg3 0000:01:00.0 eth0: Link is up at 1000 Mbps, full duplex
> [141385.484012] tg3 0000:01:00.0 eth0: Flow control is on for TX and on for RX
> [141385.484013] tg3 0000:01:00.0 eth0: EEE is enabled
> [141385.484030] br0: port 1(eth0) entered blocking state
> [141385.484032] br0: port 1(eth0) entered forwarding state
> [141948.494116] tg3 0000:01:00.0 eth0: Link is down
> [141948.779708] br0: port 1(eth0) entered disabled state
> [141952.243529] tg3 0000:01:00.0 eth0: Link is up at 1000 Mbps, full duplex
> [141952.243536] tg3 0000:01:00.0 eth0: Flow control is on for TX and on for RX
> [141952.243539] tg3 0000:01:00.0 eth0: EEE is enabled
> [141952.243573] br0: port 1(eth0) entered blocking state
> [141952.243576] br0: port 1(eth0) entered forwarding state
> 
> 
>> On 11 Nov 2019, at 13:44, Rudolf Spring <rudolf.spring@...il.com> wrote:
>> 
>> Problem remains. Workaround not successful.
>> 
>> tx_mac_errors: 19
>> 
>> eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 9000
>>       ether a8:20:66:28:e6:95  txqueuelen 1000  (Ethernet)
>>       RX packets 450085  bytes 287538677 (274.2 MiB)
>>       RX errors 0  dropped 0  overruns 0  frame 0
>>       TX packets 381863  bytes 444155170 (423.5 MiB)
>>       TX errors 19  dropped 0 overruns 0  carrier 0  collisions 0
>>       device interrupt 16  
>> 
>> 
>> [ 9257.566343] tg3 0000:01:00.0 eth0: Link is down
>> [ 9257.849823] br0: port 1(eth0) entered disabled state
>> [ 9261.358018] tg3 0000:01:00.0 eth0: Link is up at 1000 Mbps, full duplex
>> [ 9261.358022] tg3 0000:01:00.0 eth0: Flow control is on for TX and on for RX
>> [ 9261.358025] tg3 0000:01:00.0 eth0: EEE is enabled
>> [ 9261.358064] br0: port 1(eth0) entered blocking state
>> [ 9261.358066] br0: port 1(eth0) entered forwarding state
>> 
>>> On 11 Nov 2019, at 08:15, Rudolf Spring <rudolf.spring@...il.com> wrote:
>>> 
>>> I found a workaround. Changing the mac of br0 to the mac of the tg3 and so far no more tx mac errors. I’m not sure but its probably a bridge and not a tg3 problem. With kernel < 5.0 this was not necessary.
>>> 
>>>> On 31 Oct 2019, at 19:42, Rudolf Spring <rudolf.spring@...il.com> wrote:
>>>> 
>>>> I’m using it in bridged mode with wlan adapters and hostapd. The problem only happens if I access over eth0 not over wlan0 or wlan1. STP is not the problem. Same config with 4.19 has no problems only after 5.0.
>>>> 
>>>> driver: tg3
>>>> version: 3.137
>>>> firmware-version: 57766a-v1.13
>>>> expansion-rom-version: 
>>>> bus-info: 0000:01:00.0
>>>> supports-statistics: yes
>>>> supports-test: yes
>>>> supports-eeprom-access: yes
>>>> supports-register-dump: yes
>>>> supports-priv-flags: no
>>>> 
>>>>> On 31 Oct 2019, at 11:49, Siva Reddy Kallam <siva.kallam@...adcom.com> wrote:
>>>>> 
>>>>> Tried reproducing local with 5.4.0-rc3 kernel and I couldn't observe the issue.
>>>>> I used the internet for almost 15-20 mins and no MAC errors observed.
>>>>> Can you please provide ethtool -i output? I will use the same f/w
>>>>> version and try.
>>>>> 
>>>>> On Fri, Oct 18, 2019 at 12:21 PM Siva Reddy Kallam
>>>>> <siva.kallam@...adcom.com> wrote:
>>>>>> 
>>>>>> On Thu, Oct 17, 2019 at 11:03 PM Rudolf Spring <rudolf.spring@...il.com> wrote:
>>>>>>> 
>>>>>>> Can you reproduce the error in the lab ? Same behaviour with Kernel 5.3.6.
>>>>>>> 
>>>>>> Yes. We are trying to reproduce in our local lab.  We will update once
>>>>>> we have reproduction.
>>>>>>> 
>>>>>>> eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 9000
>>>>>>>    ether a8:20:66:28:e6:95  txqueuelen 1000  (Ethernet)
>>>>>>>    RX packets 13844854  bytes 2298858755 (2.1 GiB)
>>>>>>>    RX errors 0  dropped 2  overruns 0  frame 0
>>>>>>>    TX packets 14831625  bytes 75684684566 (70.4 GiB)
>>>>>>>    TX errors 158  dropped 0 overruns 0  carrier 0  collisions 0
>>>>>>>    device interrupt 16
>>>>>>> 
>>>>>>> tx_octets: 75686159197
>>>>>>> tx_collisions: 0
>>>>>>> tx_xon_sent: 0
>>>>>>> tx_xoff_sent: 0
>>>>>>> tx_flow_control: 0
>>>>>>> tx_mac_errors: 158
>>>>>>> tx_single_collisions: 0
>>>>>>> tx_mult_collisions: 0
>>>>>>> tx_deferred: 0
>>>>>>> tx_excessive_collisions: 0
>>>>>>> tx_late_collisions: 0
>>>>>>> tx_collide_2times: 0
>>>>>>> tx_collide_3times: 0
>>>>>>> tx_collide_4times: 0
>>>>>>> tx_collide_5times: 0
>>>>>>> tx_collide_6times: 0
>>>>>>> tx_collide_7times: 0
>>>>>>> tx_collide_8times: 0
>>>>>>> tx_collide_9times: 0
>>>>>>> tx_collide_10times: 0
>>>>>>> tx_collide_11times: 0
>>>>>>> tx_collide_12times: 0
>>>>>>> tx_collide_13times: 0
>>>>>>> tx_collide_14times: 0
>>>>>>> tx_collide_15times: 0
>>>>>>> tx_ucast_packets: 14400082
>>>>>>> tx_mcast_packets: 435104
>>>>>>> tx_bcast_packets: 1542
>>>>>>> tx_carrier_sense_errors: 0
>>>>>>> tx_discards: 0
>>>>>>> tx_errors: 0
>>>>>>> 
>>>>>>> 
>>>>>>>> On 4 Oct 2019, at 14:53, Rudolf Spring <rudolf.spring@...il.com> wrote:
>>>>>>>> 
>>>>>>>> With Kernel 5.3.2. Interesting all are tx_mac_errors.
>>>>>>>> 
>>>>>>>> ifconfig  eth0
>>>>>>>> eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 9000
>>>>>>>>   ether a8:20:66:28:e6:95  txqueuelen 1000  (Ethernet)
>>>>>>>>   RX packets 1649204  bytes 775261068 (739.3 MiB)
>>>>>>>>   RX errors 0  dropped 0  overruns 0  frame 0
>>>>>>>>   TX packets 1144621  bytes 1241414276 (1.1 GiB)
>>>>>>>>   TX errors 369  dropped 0 overruns 0  carrier 0  collisions 0
>>>>>>>>   device interrupt 16
>>>>>>>> 
>>>>>>>> ethtool -S eth0
>>>>>>>> NIC statistics:
>>>>>>>> rx_octets: 752756285
>>>>>>>> rx_fragments: 0
>>>>>>>> rx_ucast_packets: 1132211
>>>>>>>> rx_mcast_packets: 128115
>>>>>>>> rx_bcast_packets: 372162
>>>>>>>> rx_fcs_errors: 0
>>>>>>>> rx_align_errors: 0
>>>>>>>> rx_xon_pause_rcvd: 0
>>>>>>>> rx_xoff_pause_rcvd: 0
>>>>>>>> rx_mac_ctrl_rcvd: 0
>>>>>>>> rx_xoff_entered: 0
>>>>>>>> rx_frame_too_long_errors: 0
>>>>>>>> rx_jabbers: 0
>>>>>>>> rx_undersize_packets: 0
>>>>>>>> rx_in_length_errors: 0
>>>>>>>> rx_out_length_errors: 0
>>>>>>>> rx_64_or_less_octet_packets: 0
>>>>>>>> rx_65_to_127_octet_packets: 0
>>>>>>>> rx_128_to_255_octet_packets: 0
>>>>>>>> rx_256_to_511_octet_packets: 0
>>>>>>>> rx_512_to_1023_octet_packets: 0
>>>>>>>> rx_1024_to_1522_octet_packets: 0
>>>>>>>> rx_1523_to_2047_octet_packets: 0
>>>>>>>> rx_2048_to_4095_octet_packets: 0
>>>>>>>> rx_4096_to_8191_octet_packets: 0
>>>>>>>> rx_8192_to_9022_octet_packets: 0
>>>>>>>> tx_octets: 1236703101
>>>>>>>> tx_collisions: 0
>>>>>>>> tx_xon_sent: 0
>>>>>>>> tx_xoff_sent: 0
>>>>>>>> tx_flow_control: 0
>>>>>>>> tx_mac_errors: 369
>>>>>>>> tx_single_collisions: 0
>>>>>>>> tx_mult_collisions: 0
>>>>>>>> tx_deferred: 0
>>>>>>>> tx_excessive_collisions: 0
>>>>>>>> tx_late_collisions: 0
>>>>>>>> tx_collide_2times: 0
>>>>>>>> tx_collide_3times: 0
>>>>>>>> tx_collide_4times: 0
>>>>>>>> tx_collide_5times: 0
>>>>>>>> tx_collide_6times: 0
>>>>>>>> tx_collide_7times: 0
>>>>>>>> tx_collide_8times: 0
>>>>>>>> tx_collide_9times: 0
>>>>>>>> tx_collide_10times: 0
>>>>>>>> tx_collide_11times: 0
>>>>>>>> tx_collide_12times: 0
>>>>>>>> tx_collide_13times: 0
>>>>>>>> tx_collide_14times: 0
>>>>>>>> tx_collide_15times: 0
>>>>>>>> tx_ucast_packets: 986854
>>>>>>>> tx_mcast_packets: 146951
>>>>>>>> tx_bcast_packets: 1117
>>>>>>>> tx_carrier_sense_errors: 0
>>>>>>>> tx_discards: 0
>>>>>>>> tx_errors: 0
>>>>>>>> dma_writeq_full: 0
>>>>>>>> dma_write_prioq_full: 0
>>>>>>>> rxbds_empty: 0
>>>>>>>> rx_discards: 0
>>>>>>>> rx_errors: 0
>>>>>>>> rx_threshold_hit: 0
>>>>>>>> dma_readq_full: 0
>>>>>>>> dma_read_prioq_full: 0
>>>>>>>> tx_comp_queue_full: 0
>>>>>>>> ring_set_send_prod_index: 0
>>>>>>>> ring_status_update: 0
>>>>>>>> nic_irqs: 0
>>>>>>>> nic_avoided_irqs: 0
>>>>>>>> nic_tx_threshold_hit: 0
>>>>>>>> mbuf_lwm_thresh_hit: 0
>>>>>>>> 
>>>>>>>>> On 4 Oct 2019, at 12:52, Siva Reddy Kallam <siva.kallam@...adcom.com> wrote:
>>>>>>>>> 
>>>>>>>>> 
>>>>>>>>> 
>>>>>>>>> On Wed, Oct 2, 2019 at 10:05 PM Rudolf Spring <rudolf.spring@...il.com> wrote:
>>>>>>>>> The output of dmesg and ethtool is identical between 4.19.72 and 5.3.2. Any suggestions ?
>>>>>>>>> Can you please provide the output of "ethtool -S eth0" command?
>>>>>>>>> In the mean time, I will review the register dump and also try to reproduce in our lab.
>>>>>>>>> 0000:01:00.0: enabling device (0000 -> 0002)
>>>>>>>>> [    1.140738] tg3 0000:01:00.0 eth0: Tigon3 [partno(BCM957766a) rev 57766001] (PCI Express) MAC address a8:20:66:28:e6:95
>>>>>>>>> [    1.140741] tg3 0000:01:00.0 eth0: attached PHY is 57765 (10/100/1000Base-T Ethernet) (WireSpeed[1], EEE[1])
>>>>>>>>> [    1.140743] tg3 0000:01:00.0 eth0: RXcsums[1] LinkChgREG[0] MIirq[0] ASF[0] TSOcap[1]
>>>>>>>>> [    1.140744] tg3 0000:01:00.0 eth0: dma_rwctrl[00000001] dma_mask[64-bit]
>>>>>>>>> [   10.290239] tg3 0000:01:00.0 eth0: Link is up at 1000 Mbps, full duplex
>>>>>>>>> [   10.290241] tg3 0000:01:00.0 eth0: Flow control is on for TX and on for RX
>>>>>>>>> [   10.290242] tg3 0000:01:00.0 eth0: EEE is enabled
>>>>>>>>> 
>>>>>>>>> ethtool eth0
>>>>>>>>> Settings for eth0:
>>>>>>>>>   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: Symmetric
>>>>>>>>>   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: Twisted Pair
>>>>>>>>>   PHYAD: 1
>>>>>>>>>   Transceiver: internal
>>>>>>>>>   Auto-negotiation: on
>>>>>>>>>   MDI-X: off
>>>>>>>>>   Supports Wake-on: g
>>>>>>>>>   Wake-on: g
>>>>>>>>>   Current message level: 0x000000ff (255)
>>>>>>>>>                          drv probe link timer ifdown ifup rx_err tx_err
>>>>>>>>>   Link detected: yes
>>>>>>>>> 
>>>>>>>>> ethtool -a eth0
>>>>>>>>> Pause parameters for eth0:
>>>>>>>>> Autonegotiate:  on
>>>>>>>>> RX:             on
>>>>>>>>> TX:             on
>>>>>>>>> RX negotiated:  on
>>>>>>>>> TX negotiated:  on
>>>>>>>>> 
>>>>>>>>> ethtool -g eth0
>>>>>>>>> Ring parameters for eth0:
>>>>>>>>> Pre-set maximums:
>>>>>>>>> RX:             511
>>>>>>>>> RX Mini:        0
>>>>>>>>> RX Jumbo:       255
>>>>>>>>> TX:             511
>>>>>>>>> Current hardware settings:
>>>>>>>>> RX:             200
>>>>>>>>> RX Mini:        0
>>>>>>>>> RX Jumbo:       100
>>>>>>>>> TX:             511
>>>>>>>>> 
>>>>>>>>> ethtool -c eth0
>>>>>>>>> Coalesce parameters for eth0:
>>>>>>>>> Adaptive RX: off  TX: off
>>>>>>>>> stats-block-usecs: 0
>>>>>>>>> sample-interval: 0
>>>>>>>>> pkt-rate-low: 0
>>>>>>>>> pkt-rate-high: 0
>>>>>>>>> 
>>>>>>>>> rx-usecs: 20
>>>>>>>>> rx-frames: 5
>>>>>>>>> rx-usecs-irq: 0
>>>>>>>>> rx-frames-irq: 5
>>>>>>>>> 
>>>>>>>>> tx-usecs: 72
>>>>>>>>> tx-frames: 53
>>>>>>>>> tx-usecs-irq: 0
>>>>>>>>> tx-frames-irq: 5
>>>>>>>>> 
>>>>>>>>> rx-usecs-low: 0
>>>>>>>>> rx-frame-low: 0
>>>>>>>>> tx-usecs-low: 0
>>>>>>>>> tx-frame-low: 0
>>>>>>>>> 
>>>>>>>>> rx-usecs-high: 0
>>>>>>>>> rx-frame-high: 0
>>>>>>>>> tx-usecs-high: 0
>>>>>>>>> tx-frame-high: 0
>>>>>>>>> 
>>>>>>>>> ethtool -k eth0
>>>>>>>>> Features for eth0:
>>>>>>>>> rx-checksumming: on
>>>>>>>>> tx-checksumming: on
>>>>>>>>>   tx-checksum-ipv4: on
>>>>>>>>>   tx-checksum-ip-generic: off [fixed]
>>>>>>>>>   tx-checksum-ipv6: on
>>>>>>>>>   tx-checksum-fcoe-crc: off [fixed]
>>>>>>>>>   tx-checksum-sctp: off [fixed]
>>>>>>>>> scatter-gather: on
>>>>>>>>>   tx-scatter-gather: on
>>>>>>>>>   tx-scatter-gather-fraglist: off [fixed]
>>>>>>>>> tcp-segmentation-offload: on
>>>>>>>>>   tx-tcp-segmentation: on
>>>>>>>>>   tx-tcp-ecn-segmentation: on
>>>>>>>>>   tx-tcp-mangleid-segmentation: off
>>>>>>>>>   tx-tcp6-segmentation: on
>>>>>>>>> udp-fragmentation-offload: off
>>>>>>>>> generic-segmentation-offload: on
>>>>>>>>> generic-receive-offload: on
>>>>>>>>> large-receive-offload: off [fixed]
>>>>>>>>> rx-vlan-offload: on [fixed]
>>>>>>>>> tx-vlan-offload: on [fixed]
>>>>>>>>> ntuple-filters: off [fixed]
>>>>>>>>> receive-hashing: off [fixed]
>>>>>>>>> highdma: on
>>>>>>>>> rx-vlan-filter: off [fixed]
>>>>>>>>> vlan-challenged: off [fixed]
>>>>>>>>> tx-lockless: off [fixed]
>>>>>>>>> netns-local: off [fixed]
>>>>>>>>> tx-gso-robust: off [fixed]
>>>>>>>>> tx-fcoe-segmentation: off [fixed]
>>>>>>>>> tx-gre-segmentation: off [fixed]
>>>>>>>>> tx-gre-csum-segmentation: off [fixed]
>>>>>>>>> tx-ipxip4-segmentation: off [fixed]
>>>>>>>>> tx-ipxip6-segmentation: off [fixed]
>>>>>>>>> tx-udp_tnl-segmentation: off [fixed]
>>>>>>>>> tx-udp_tnl-csum-segmentation: off [fixed]
>>>>>>>>> tx-gso-partial: off [fixed]
>>>>>>>>> tx-sctp-segmentation: off [fixed]
>>>>>>>>> tx-esp-segmentation: off [fixed]
>>>>>>>>> tx-udp-segmentation: off [fixed]
>>>>>>>>> fcoe-mtu: off [fixed]
>>>>>>>>> tx-nocache-copy: off
>>>>>>>>> loopback: off [fixed]
>>>>>>>>> rx-fcs: off [fixed]
>>>>>>>>> rx-all: off [fixed]
>>>>>>>>> tx-vlan-stag-hw-insert: off [fixed]
>>>>>>>>> rx-vlan-stag-hw-parse: off [fixed]
>>>>>>>>> rx-vlan-stag-filter: off [fixed]
>>>>>>>>> l2-fwd-offload: off [fixed]
>>>>>>>>> hw-tc-offload: off [fixed]
>>>>>>>>> esp-hw-offload: off [fixed]
>>>>>>>>> esp-tx-csum-hw-offload: off [fixed]
>>>>>>>>> rx-udp_tunnel-port-offload: off [fixed]
>>>>>>>>> tls-hw-tx-offload: off [fixed]
>>>>>>>>> tls-hw-rx-offload: off [fixed]
>>>>>>>>> rx-gro-hw: off [fixed]
>>>>>>>>> tls-hw-record: off [fixed]
>>>>>>>>> 
>>>>>>>>> ethtool -n eth0
>>>>>>>>> 4 RX rings available
>>>>>>>>> rxclass: Cannot get RX class rule count: Operation not supported
>>>>>>>>> RX classification rule retrieval failed
>>>>>>>>> 
>>>>>>>>> ethtool -t eth0
>>>>>>>>> The test result is PASS
>>>>>>>>> The test extra info:
>>>>>>>>> nvram test        (online)       0
>>>>>>>>> link test         (online)       0
>>>>>>>>> register test     (offline)      0
>>>>>>>>> memory test       (offline)      0
>>>>>>>>> mac loopback test (offline)      0
>>>>>>>>> phy loopback test (offline)      0
>>>>>>>>> ext loopback test (offline)      0
>>>>>>>>> interrupt test    (offline)      0
>>>>>>>>> 
>>>>>>>>> ethtool -T eth0
>>>>>>>>> Time stamping parameters for eth0:
>>>>>>>>> Capabilities:
>>>>>>>>>   software-transmit     (SOF_TIMESTAMPING_TX_SOFTWARE)
>>>>>>>>>   software-receive      (SOF_TIMESTAMPING_RX_SOFTWARE)
>>>>>>>>>   software-system-clock (SOF_TIMESTAMPING_SOFTWARE)
>>>>>>>>> PTP Hardware Clock: none
>>>>>>>>> Hardware Transmit Timestamp Modes:
>>>>>>>>>   off                   (HWTSTAMP_TX_OFF)
>>>>>>>>>   on                    (HWTSTAMP_TX_ON)
>>>>>>>>> Hardware Receive Filter Modes:
>>>>>>>>>   none                  (HWTSTAMP_FILTER_NONE)
>>>>>>>>>   ptpv1-l4-event        (HWTSTAMP_FILTER_PTP_V1_L4_EVENT)
>>>>>>>>>   ptpv2-l4-event        (HWTSTAMP_FILTER_PTP_V2_L4_EVENT)
>>>>>>>>>   ptpv2-l2-event        (HWTSTAMP_FILTER_PTP_V2_L2_EVENT)
>>>>>>>>> 
>>>>>>>>> ethtool -l eth0
>>>>>>>>> Channel parameters for eth0:
>>>>>>>>> Pre-set maximums:
>>>>>>>>> RX:             4
>>>>>>>>> TX:             1
>>>>>>>>> Other:          0
>>>>>>>>> Combined:       0
>>>>>>>>> Current hardware settings:
>>>>>>>>> RX:             4
>>>>>>>>> TX:             1
>>>>>>>>> Other:          0
>>>>>>>>> Combined:       0
>>>>>>>>> 
>>>>>>>>> ethtool --show-eee eth0
>>>>>>>>> EEE Settings for eth0:
>>>>>>>>>   EEE status: enabled - active
>>>>>>>>>   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:  100baseT/Full
>>>>>>>>>                                            1000baseT/Full
>>>>>>>>> 
>>>>>>>>>> These are all the tg3 changes between 4.19 and 5.0:
>>>>>>>>>> 
>>>>>>>>>> 750afb08ca71 cross-tree: phase out dma_zalloc_coherent()
>>>>>>>>>> cddaf02bcb73 tg3: optionally use eth_platform_get_mac_address() to get
>>>>>>>>>> mac address
>>>>>>>>>> 3c1bcc8614db net: ethernet: Convert phydev advertize and supported
>>>>>>>>>> from u32 to link mode
>>>>>>>>>> 6fe42e228dc2 tg3: extend PTP gettime function to read system clock
>>>>>>>>>> 310fc0513ea9 tg3: Fix fall-through annotations
>>>>>>>>>> 22b7d29926b5 net: ethernet: Add helper to determine if pause
>>>>>>>>>> configuration is supported
>>>>>>>>>> 70814e819c11 net: ethernet: Add helper for set_pauseparam for Asym Pause
>>>>>>>>>> af8d9bb2f2f4 net: ethernet: Add helper for MACs which support asym pause
>>>>>>>>>> 04b7d41d8046 net: ethernet: Fix up drivers masking pause support
>>>>>>>>>> 58056c1e1b0e net: ethernet: Use phy_set_max_speed() to limit advertised speed
>>>>>>>>>> 
>>>>>>>>>> Most of the changes are related to PHY settings.  I suggest that you
>>>>>>>>>> check the link settings, including speed, pause, asym pause, etc
>>>>>>>>>> between the working kernel and the non-working kernel to see if there
>>>>>>>>>> are differences in the settings.
>>>>>>>>> 
>>>>>>>> 
>>>>>>> 
>>>> 
>>> 
>> 
> 

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