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Date: Sat, 18 Jul 2020 02:37:41 +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 Fri, 17 Jul 2020 at 21:26, Russell King - ARM Linux admin
<linux@...linux.org.uk> wrote:
> Both ends really need to agree, and I'd suggest cp1_eth2 needs to drop
> the fixed-link stanza and instead use ``managed = "in-band";'' to be
> in agreement with the configuration at the switch.
>
> Martin, can you modify
> arch/arm64/boot/dts/marvell/armada-8040-clearfog-gt-8k.dts to test
> that please?
eth2 now doesn't come up
$ ip link set eth2 up
RTNETLINK answers: No such device
$ dmesg
...
mvpp2 f4000000.ethernet eth2: could not attach PHY (-19)
...
A working dmesg looks like:
$ 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 fixed/2500base-x link mode
mvpp2 f4000000.ethernet eth2: Link is Up - 2.5Gbps/Full - flow control off
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 eth2: Link is Down
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 fixed/2500base-x link mode
mvpp2 f4000000.ethernet eth2: Link is Up - 2.5Gbps/Full - flow control off
mvpp2 f4000000.ethernet eth2: Link is Down
mvpp2 f4000000.ethernet eth2: configuring for fixed/2500base-x link mode
mvpp2 f4000000.ethernet eth2: Link is Up - 2.5Gbps/Full - flow control off
mvpp2 f4000000.ethernet eth1: Link is Up - 1Gbps/Full - flow control rx/tx
With the DTS patch it looks like:
$ 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: could not attach PHY (-19)
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 eth1: Link is Up - 1Gbps/Full - flow control rx/tx
Output from regs just in case it helps:
$ cat /sys/kernel/debug/mv88e6xxx.0/regs
GLOBAL GLOBAL2 SERDES 0 1 2 3 4 5
0: c801 0 ffff 9e07 1e4f 100f 100f 1e4f 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 43c 43c 43c 43c 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: 3f7 0 ffff 0 0 0 0 0 0
d: ffff 555 ffff 0 0 0 0 0 0
e: ffff 1 ffff 0 0 0 0 0 0
f: ffff 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: 200 110f ffff 8000 8000 8000 8000 8000 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 0 0 0 0 0
I also tried "in-band-status", which has a "working" dmesg but doesn't
tx or rx packets; so basically the same as mainline without patching
the DTS.
Just to make sure I applied the right change, here is the diff:
diff --git a/arch/arm64/boot/dts/marvell/armada-8040-clearfog-gt-8k.dts
b/arch/arm64/boot/dts/marvell/armada-8040-clearfog-gt-8k.dts
index c8243da71041..957ca7e69c1a 100644
--- a/arch/arm64/boot/dts/marvell/armada-8040-clearfog-gt-8k.dts
+++ b/arch/arm64/boot/dts/marvell/armada-8040-clearfog-gt-8k.dts
@@ -454,10 +454,7 @@ &cp1_eth2 {
status = "okay";
phy-mode = "2500base-x";
phys = <&cp1_comphy5 2>;
- fixed-link {
- speed = <2500>;
- full-duplex;
- };
+ managed = "in-band";
};
&cp1_spi1 {
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