ARM GLX Khadas VIM Pro - Ethernet detected as only 10Mbps and stalled after some traffic

Tue Jun 27 10:14:45 PDT 2017

Hi,
There are other user reporting same issue while using mainline kernel
but using Ubuntu, so this is for sure not Distribution related. For me
see the [0]. I hope someone would get time after 4.12 release to try
fix this issue.

Regards,

[0] http://forum.khadas.com/t/ubuntu-server-rom-linux-mainline-v170624-pre-alpha-version-emmc-installation/803/12

On Thu, Jun 15, 2017 at 4:40 PM, crow <crow at linux.org.ba> wrote:
> Hi,
>
> On Sun, Jun 11, 2017 at 7:03 PM, crow <crow at linux.org.ba> wrote:
>> Hi Andrew,
>>
>> On Sun, Jun 11, 2017 at 5:21 PM, Andrew Lunn <andrew at lunn.ch> wrote:
>>>> Thank your for the suggestion, and thanks Martin to explaining me over
>>>> IRC what actually I should do.
>>>>
>>>> I recompiled mainline kernel 4.12-rc4 with the Amlogic driver:
>>>> replaced drivers/net/phy/meson-gxl.c with
>>>> https://github.com/khadas/linux/blob/ubuntu-4.9/drivers/amlogic/ethernet/phy/amlogic.c
>>>>
>>>> But this did not solve the issue. As soon as i start git clone i lose
>>>> network connection to device (no session timeout/disconnect this time,
>>>> but I am unable to reconnect over SSH or to get OK ping replay back).
>>>
>>
>> 1) First problem reported I can't reproduce anymore, every reboot/cold
>> boot with mainline kernel the Ethernet speed is detected as
>> "100Mbps/Full" , but as seen in first post there was this issue.
>
> Once I did setup u-boot to have network in u-boot and did just an ping
> to activate network. And after boot Ethernet was detected as 10Mbps.
> But again was not able to reproduce it. I double check that I have 5E
> cable.
>
> in u-boot Ethernet is detected as below
> kvim#ping x.x.x.x
> Speed: 100, full duplex
> Using dwmac.c9410000 device
> host x.x.x.x is alive
> kvim#
>
> then I let ArchLinuxArm to boot and found out I can't connect to
> device over SSH. Check over serial console and found:
>
> # dmesg | tail -n 10
> [    8.334790] meson8b-dwmac c9410000.ethernet eth0: device MAC
> address 00:15:18:01:81:31
> [    8.436668] Meson GXL Internal PHY 0.e40908ff:08: attached PHY
> driver [Meson GXL Internal PHY] (mii_bus:phy_addr=0.e40908ff:08,
> irq=-1)
> [    8.535171] meson8b-dwmac c9410000.ethernet eth0: PTP not supported by HW
> [   10.225264] brcmfmac: brcmf_c_preinit_dcmds: Firmware version =
> wl0: Mar  1 2015 07:29:38 version 7.45.18 (r538002) FWID 01-6a2c8ad4
> [   10.635703] meson8b-dwmac c9410000.ethernet eth0: Link is Up -
> 10Mbps/Half - flow control off
> # uname -a
> Linux khadasvimpro 4.12.0-rc4-3-ARCH #1 SMP Thu Jun 8 00:17:20 CEST
> 2017 aarch64 GNU/Linux
> #
> # mii-tool -vvv eth0
> Using SIOCGMIIPHY=0x8947
> eth0: no autonegotiation,, link ok
>   registers for MII PHY 8:
>     1000 782d 0181 4400 01e1 0001 0005 2001
>     ffff ffff ffff ffff ffff ffff ffff ffff
>     0040 0002 40e8 5400 1c1c 0000 0000 aaaa
>     fff0 ffff 0000 000a 1407 0040 0000 105a
>   product info: vendor 00:60:51, model 0 rev 0
>   basic mode:   autonegotiation enabled
>   basic status: autonegotiation complete, link ok
>   capabilities: 1000baseT-HD 1000baseT-FD 100baseTx-FD 100baseTx-HD
> 10baseT-FD 10baseT-HD
>   advertising:  1000baseT-HD 1000baseT-FD 100baseTx-FD 100baseTx-HD
> 10baseT-FD 10baseT-HD
> #
> # ifconfig eth0 down && ifconfig eth0 up
> [ 1972.596690] Meson GXL Internal PHY 0.e40908ff:08: attached PHY
> driver [Meson GXL Internal PHY] (mii_bus:phy_addr=0.e40908ff:08,
> irq=-1)
> [ 1972.704156] meson8b-dwmac c9410000.ethernet eth0: PTP not supported by HW
> [ 1974.795698] meson8b-dwmac c9410000.ethernet eth0: Link is Up -
> 100Mbps/Full - flow control off
> #
> # mii-tool -vvv eth0
> Using SIOCGMIIPHY=0x8947
> eth0: negotiated 1000baseT-HD flow-control, link ok
>   registers for MII PHY 8:
>     1000 782d 0181 4400 01e1 c1e1 000f 2001
>     ffff ffff ffff ffff ffff ffff ffff ffff
>     0040 0002 40e8 5400 1c1c 0000 0000 aaaa
>     fff0 ffff 0000 020a 1407 00ca 0000 105a
>   product info: vendor 00:60:51, model 0 rev 0
>   basic mode:   autonegotiation enabled
>   basic status: autonegotiation complete, link ok
>   capabilities: 1000baseT-HD 1000baseT-FD 100baseTx-FD 100baseTx-HD
> 10baseT-FD 10baseT-HD
>   advertising:  1000baseT-HD 1000baseT-FD 100baseTx-FD 100baseTx-HD
> 10baseT-FD 10baseT-HD
>   link partner: 1000baseT-HD 1000baseT-FD 100baseTx-FD 100baseTx-HD
> 10baseT-FD 10baseT-HD
> #
>
> 2) see below
>> 2) see below
>>
>>> So this shows it is more than a PHY problem. The Ethernet MAC driver
>>> is probably also part of the problem.
>>
>> There are some stmmac fixes [1] in soon to be rc5, compiled current
>> master (without amlogic.c) with the fixes but for me the issue still
>> persist. I will compile once released rc5 with amlogic.c and report
>> back.
>>
>>> Are there any mainline kernels which work O.K?
>>
>> Khadas VIM support was added in 4.12-rc1. And I did test all four rc's
>> but without success.
>
> I did test many Kernel builds but all test have failed when
> downloading bigger files / doing git clone.
> As Martin Blumenstingl suggested I start with first commit where
> Khadas VIM support was added [0]. Then also Neil Armstrong suggested
> [1]. Then all 4.12-rc1 - rc5.
> Martin Blumenstingl have also found himself that: "I can reproduce the
> Ethernet problem (tried downloading a 1GiB test file from leaseweb,
> network got stuck after downloading ~70 MiB)". He suggested that I
> should "play with the settings on your switch (disable jumbo frames,
> etc.) to rule out the "exotic" stuff?". Well other device (x86_64)
> connected on this same Switch port does not have any problem
> downloading big files or doing git clone, as well as Khadas VIM with
> Amlogic kernel. Also jumbo frames are not enabled, switch does have
> only standard settings.
>
> I also get questioned which qdisc I use:
> And it seems I am already using fq_codel (ArchLinuxArm uses systemd):
> $ tc -s -p qdisc
> qdisc noqueue 0: dev lo root refcnt 2
>  Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0)
>  backlog 0b 0p requeues 0
> qdisc mq 0: dev eth0 root
>  Sent 7382956 bytes 60703 pkt (dropped 0, overlimits 0 requeues 18)
>  backlog 0b 0p requeues 18
> qdisc fq_codel 0: dev eth0 parent :1 limit 10240p flows 1024 quantum
> 1514 target 5.0ms interval 100.0ms memory_limit 32Mb ecn
>  Sent 7382956 bytes 60703 pkt (dropped 0, overlimits 0 requeues 18)
>  backlog 0b 0p requeues 18
>   maxpacket 54 drop_overlimit 0 new_flow_count 14 ecn_mark 0
>   new_flows_len 0 old_flows_len 0
> $ pacman -Qi systemd
> Name            : systemd
> Version         : 232-8
> Description     : system and service manager
> Architecture    : aarch64
> ...
> $
>
>
> Regards,
>
>>>     Andrew
>>
>> [1] https://github.com/torvalds/linux/commit/426849e6611f2092553f8d53372ae310818a6292
>
> [0] https://github.com/torvalds/linux/commit/e15d2774b8c096f116bf7192b37e8652da71369e
> [1] https://kernel.googlesource.com/pub/scm/linux/kernel/git/khilman/linux-amlogic/+/v4.12/integ