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Date: Thu, 5 Nov 2020 15:38:26 +0000
From: Alayev Michael <malayev@....co.il>
To: "mic.al.linux@...il.com" <mic.al.linux@...il.com>,
"andrew@...n.ch" <andrew@...n.ch>
CC: "netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: net: dsa: mv88e6xxx : linux v5.4 crash
Hello Andrew,
This is my system's network topology. It relies on Xilinx's Zynq-7000 soc.
zynq-7000 switch0 switch1
(cpu) mv88e6390x mv88e6390x
------- --------- ---------
| | | | | |
| gem0|------|p0 p10|-----|p10 |
| | | | | |
| | --------- ---------
| | |mdio_addr=2 | mdio_addr=3
| | | |
| |-------------------------------|
| | |
| | | mv88e1510(debug_phy)
| | | mdio_addr=1 --------
| | --------------------| |
| | | |
| gem1|------------------------| |
| | | |
| | --------
-------
I have built a v5.4 linux kernel for it and its ethernet network defined in the device-tree as follows
(arch/arm/boot/dts/zynq-zed.dts gem0 and gem1) :
> Please fix your email client and
> post the DT file for review. I will
> then point out some of the errors.
Tried to fix it, and indented it again:
&gem0 {
status = "okay";
phy-mode = "rgmii-id";
phy-handle = <&phy0>;
fixed-link {
speed = <1000>;
full-duplex;
};
> The diagram you showed had gem0 connected directly to the switch. So
> this phy-handle is wrong. Or the diagram is wrong.
The diagram is correct. I have commented the phy-mode and phy-handle in 'gem0' definition and got error:
'macb e000b000.ethernet eth0: no PHY found'
dbg_phy: phy@1 {
reg = <1>;
label = "debug";
};
switch0: switch@2 {
compatible = "marvell,mv88e6190";
#address-cells = <1>;
#size-cells = <0>;
reg = <2>;
dsa,member = <0 0>;
ports {
#address-cells = <1>;
#size-cells = <0>;
switch0phy1: port@0 {
reg = <0>;
label = "uid208-cpu";
ethernet = <&gem0>;
phy-mode = "rgmii-id";
> You have gem0 using phy-mode = "rgmii-id" as well. Both doing delays
> will not work. You should drop the one in gem0.
As I've mentioned above, I dropped it but got error.
fixed-link {
speed = <1000>;
full-duplex;
};
};
port@1 {
reg = <1>;
label = "uid201-1A";
};
port@2 {
reg = <2>;
label = "uid202-2A-p9-1A";
phy-mode = "1000base-x";
fixed-link {
speed = <1000>;
full-duplex;
};
};
port@3 {
reg = <3>;
label = "uid203-3A-p9-2A";
phy-mode = "1000base-x";
fixed-link {
speed = <1000>;
full-duplex;
};
};
port@4 {
reg = <4>;
label = "uid204-4A-p9-3A";
phy-mode = "1000base-x";
fixed-link {
speed = <1000>;
full-duplex;
};
};
port@5 {
reg = <5>;
label = "uid205-5A";
};
port@6 {
reg = <6>;
label = "uid206-6A";
};
port@7 {
reg = <7>;
label = "uid207-7A";
};
port@8 {
reg = <8>;
label = "uid208-8A";
};
port@9 {
reg = <9>;
label = "uid209-9A-p9-0A";
phy-mode = "1000base-x";
fixed-link {
speed = <1000>;
full-duplex;
};
};
> Why both 1000base-x and fixed link? Do you have an SFP connected? If
> so, describe the SFP in DT.
I do have SFP connected. In my previous DT on linux v4.14 I didn’t have it on DT and it worked fine.
How do I describe it here?
switch0port10: port@10 {
reg = <10>;
label = "dsa";
link = <&switch1port10>;
phy-mode = "1000base-x";
fixed-link {
speed = <1000>;
full-duplex;
};
};
};//ports
};//switch0
switch1: switch@3 {
compatible = "marvell,mv88e6190";
#address-cells = <1>;
#size-cells = <0>;
reg = <3>;
dsa,member = <0 1>;
ports {
#address-cells = <1>;
#size-cells = <0>;
port@1 {
reg = <1>;
label = "uid211-1B";
};
port@2 {
reg = <2>;
label = "uid212-2B-p9-1B";
phy-mode = "1000base-x";
fixed-link {
speed = <1000>;
full-duplex;
};
};
port@3 {
reg = <3>;
label = "uid213-3B-p9-2B";
phy-mode = "1000base-x";
fixed-link {
speed = <1000>;
full-duplex;
};
};
port@4 {
reg = <4>;
label = "uid214-4B-p9-3B";
phy-mode = "1000base-x";
fixed-link {
speed = <1000>;
full-duplex;
};
};
port@5 {
reg = <5>;
label = "uid215-5B";
};
port@6 {
reg = <6>;
label = "uid216-6B";
};
port@7 {
reg = <7>;
label = "uid217-7B";
};
port@8 {
reg = <8>;
label = "uid218-8B";
};
port@9 {
reg = <9>;
label = "uid219-9B-p9-0B";
phy-mode = "1000base-x";
fixed-link {
speed = <1000>;
full-duplex;
};
};
switch1port10: port@10 {
reg = <10>;
label = "dsa";
link = <&switch0port10>;
phy-mode = "1000base-x";
fixed-link {
speed = <1000>;
full-duplex;
};
};
};//ports
};//switch1
};//gem0
&gem1 {
status = "okay";
phy-handle = <&dbg_phy>;
};
> This is a 6390X right? Why limit it to 1000base-X when it could be
> doing 10G?
Yes. In the 4.14 DT I've tried to put speed=2500 but it didn’t work.
Its crashes on linux startup. What should be fixed in my dts/dtsi?
Thank you
Michael Alayev
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