netdev - Aw: Re: Re: Re: [PATCH v2] net: mtk_sgmii: implement mtk_pcs

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Date:   Sat, 22 Oct 2022 12:52:00 +0200
From:   Frank Wunderlich <frank-w@...lic-files.de>
To:     "Russell King (Oracle)" <linux@...linux.org.uk>
Cc:     Frank Wunderlich <linux@...web.de>,
        linux-mediatek@...ts.infradead.org,
        Alexander Couzens <lynxis@...0.eu>,
        Felix Fietkau <nbd@....name>, John Crispin <john@...ozen.org>,
        Sean Wang <sean.wang@...iatek.com>,
        Mark Lee <Mark-MC.Lee@...iatek.com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        netdev@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Subject: Aw: Re: Re: Re: [PATCH v2] net: mtk_sgmii: implement mtk_pcs_ops

> Gesendet: Samstag, 22. Oktober 2022 um 11:11 Uhr
> Von: "Russell King (Oracle)" <linux@...linux.org.uk>

> Please try this untested patch, which should setup the PCS to perform
> autonegotiation when using in-band mode for 1000base-X, write the
> correct to offset 8, and set the link timer correctly.

hi,

this patch breaks connectivity at least on the sfp-port (eth1).

root@...-r3:~# ip link set eth1 up
[   65.457521] mtk_soc_eth 15100000.ethernet eth1: configuring for inband/1000base-x link mode
root@...-r3:~# [   65.522936] offset:0 0x2c1140
[   65.522950] offset:4 0x4d544950
[   65.525914] offset:8 0x40e041a0
[   65.529064] mtk_soc_eth 15100000.ethernet eth1: Link is Up - 1Gbps/Unknown - flow control off
[   65.540733] IPv6: ADDRCONF(NETDEV_CHANGE): eth1: link becomes ready

root@...-r3:~# ip a a 192.168.0.19/24 dev eth1
root@...-r3:~# ip r a default via 192.168.0.10
root@...-r3:~# iperf3 -c 192.168.0.21 #ping does not work too
iperf3: error - unable to send control message: Bad file descriptor
root@...-r3:~# ethtool eth1
[  177.346183] offset:0 0x2c1140
[  177.346202] offset:4 0x4d544950
Settings for eth[  177.349168] offset:8 0x40e041a0
1:
        Supported p[  177.352477] offset:0 0x2c1140
[  177.356952] offset:4 0x4d544950

        Supported link modes:   1000baseX/Full
        Supported pause frame use: Symmetric Receive-only
        Supports auto-negotiation: Yes
        Supported FEC modes: Not reported
        Advertised link modes:  1000baseX/Full
        Advertised pause frame use: Symmetric Receive-only
        Advertised auto-negotiation: Yes
        Advertised FEC modes: Not reported
        Speed: 1000Mb/s
        Duplex: Unknown! (255)
        Auto-negotiation: on
        Port: FIBRE
        PHYAD: 0
        Transceiver: internal
        Current message level: 0x000000ff (255)
                               drv probe link timer ifdown ifup rx_err tx_err
        Link detected: yes
root@...-r3:~#

from sgmii_init
[    1.091796] dev: 1 offset:0 0x81140
[    1.094977] dev: 1 offset:4 0x4d544950
[    1.098456] dev: 1 offset:8 0x1
...
pcs_get_state
[   65.522936] offset:0 0x2c1140
[   65.522950] offset:4 0x4d544950
[   65.525914] offset:8 0x40e041a0
[  177.346183] offset:0 0x2c1140
[  177.346202] offset:4 0x4d544950
[  177.349168] offset:8 0x40e041a0
[  177.352477] offset:0 0x2c1140
[  177.356952] offset:4 0x4d544950

regards Frank