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Message-ID: <CAOAjy5SewXHQVnywzin-2LiqWyPcjTvG9zzaiVRtwfCG=jU1Kw@mail.gmail.com>
Date:   Sat, 18 Jul 2020 09:43:47 +0000
From:   Martin Rowe <martin.p.rowe@...il.com>
To:     Russell King - ARM Linux admin <linux@...linux.org.uk>
Cc:     Andrew Lunn <andrew@...n.ch>, netdev@...r.kernel.org,
        davem@...emloft.net, vivien.didelot@...il.com
Subject: Re: bug: net: dsa: mv88e6xxx: unable to tx or rx with Clearfog GT 8K
 (with git bisect)

On Sat, 18 Jul 2020 at 08:50, Russell King - ARM Linux admin
<linux@...linux.org.uk> wrote:
> Sorry, it should have been ``managed = "in-band-status";'' rather than
> just "in-band".

Below are the outputs with "in-band-status". It functions the same as
not reverting the patch; interface comes up, when bridged the two
physical machines connected can ping each other, but nothing can tx or
rx from the GT 8K.

$ dmesg |grep f4000000
mvpp2 f4000000.ethernet: using 8 per-cpu buffers
mvpp2 f4000000.ethernet eth1: Using firmware node mac address d0:63:b4:01:00:00
mvpp2 f4000000.ethernet eth2: Using firmware node mac address d0:63:b4:01:00:02
mvpp2 f4000000.ethernet eth2: configuring for inband/2500base-x link mode
mvpp2 f4000000.ethernet eth1: PHY [f412a200.mdio-mii:00] driver
[Marvell 88E1510] (irq=POLL)
mvpp2 f4000000.ethernet eth1: configuring for phy/sgmii link mode
mv88e6085 f412a200.mdio-mii:04 lan2 (uninitialized): PHY
[!cp1!config-space@...00000!mdio@...200!switch0@...dio:11] driver
[Marvell 88E6390] (irq=72)
mv88e6085 f412a200.mdio-mii:04 lan1 (uninitialized): PHY
[!cp1!config-space@...00000!mdio@...200!switch0@...dio:12] driver
[Marvell 88E6390] (irq=73)
mv88e6085 f412a200.mdio-mii:04 lan4 (uninitialized): PHY
[!cp1!config-space@...00000!mdio@...200!switch0@...dio:13] driver
[Marvell 88E6390] (irq=74)
mv88e6085 f412a200.mdio-mii:04 lan3 (uninitialized): PHY
[!cp1!config-space@...00000!mdio@...200!switch0@...dio:14] driver
[Marvell 88E6390] (irq=75)
mvpp2 f4000000.ethernet: all ports have a low MTU, switching to per-cpu buffers
mvpp2 f4000000.ethernet: using 8 per-cpu buffers
mvpp2 f4000000.ethernet eth1: PHY [f412a200.mdio-mii:00] driver
[Marvell 88E1510] (irq=POLL)
mvpp2 f4000000.ethernet eth1: configuring for phy/sgmii link mode
mvpp2 f4000000.ethernet eth2: configuring for inband/2500base-x link mode
mvpp2 f4000000.ethernet eth2: configuring for inband/2500base-x link mode
mvpp2 f4000000.ethernet eth2: Link is Up - 2.5Gbps/Full - flow control rx/tx
mvpp2 f4000000.ethernet eth1: Link is Up - 1Gbps/Full - flow control rx/tx

$ cat /sys/kernel/debug/mv88e6xxx.0/regs
    GLOBAL GLOBAL2 SERDES     0    1    2    3    4    5
 0:  c801       0    ffff  9e07 9e5f 100f 100f 9e6f 170b
 1:     0    803e    ffff     3    3    3    3    3 201f
 2:     0       0    ffff  ff00    0    0    0    0    0
 3:     0       0    ffff  3400 3400 3400 3400 3400 3400
 4:  40a8     258    ffff    7c  43f  43c  43c  43f 373f
 5:  1000     4f0    ffff     0    0    0    0    0    0
 6:     0    1f0f    ffff    7e   7c   7a   76   6e   5f
 7:     0    703f    ffff     1    0    0    0    0    0
 8:     0    7800    ffff  2080 2080 2080 2080 2080 2080
 9:     0    1500    ffff     1    1    1    1    1    1
 a:   509       0    ffff  8000    0    0    0    0    0
 b:  3000    31ff    ffff     1    2    4    8   10    0
 c:   207       0    ffff     0    0    0    0    0    0
 d:  3333     529    ffff     0    0    0    0    0    0
 e:     1       6    ffff     0    0    0    0    0    0
 f:     3     f00    ffff  9100 9100 9100 9100 9100 dada
10:     0       0    ffff     0    0    0    0    0    0
11:     0       0    ffff     0    0    0    0    0    0
12:  5555       0    ffff     0    0    0    0    0    0
13:  5555     303    ffff     0    0    0    0    0    0
14:  aaaa       0    ffff     0    0    0    0    0    0
15:  aaaa       0    ffff     0    0    0    0    0    0
16:  ffff       0       0     0   33   33   33   33    0
17:  ffff       0    ffff     0    0    0    0    0    0
18:  fa41    15f6    ffff  3210 3210 3210 3210 3210 3210
19:     0       0    ffff  7654 7654 7654 7654 7654 7654
1a:   3ff       0    ffff     0    0    0    0 1ea0 a100
1b:   16b    110f    ffff  8000 8000 8000 8000 8092 8000
1c:   7c0       0    ffff     0    0    0    0    0    0
1d:  1400       0    ffff     0    0    0    0    0    0
1e:     0       0    ffff  f000 f000 f000 f000 f000 f000
1f:     0       0    ffff     0   bf    0    0   f2    0

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