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* i.mx6ul with DSA in multi chip addressing mode - no MDIO access
@ 2019-07-03 13:10 Benjamin Beckmeyer
  2019-07-03 15:55 ` Andrew Lunn
  0 siblings, 1 reply; 13+ messages in thread
From: Benjamin Beckmeyer @ 2019-07-03 13:10 UTC (permalink / raw)
  To: netdev

Hey folks,

I'm having a problem with a custom i.mx6ul board. When DSA is loaded I can't 
get access to the switch via MDIO, but the DSA is working properly. I set up
a bridge for testing and the switch is in forwarding mode and i can ping the 
board. But the MDIO access isn't working at address 2 for the switch. When I 
delete the DSA from the devicetree and start the board up, I can access the 
switch via MDIO.

With DSA up and running:

mii -i 2 0 0x9800
mii -i 2 1
phyid:2, reg:0x01 -> 0x4000
mii -i 2 0 0x9803
mii -i 2 1
phyid:2, reg:0x01 -> 0x4000
mii -i 2 1 0x1883
mii -i 2 1
phyid:2, reg:0x01 -> 0x4000

No DSA:

mii -i 2 0 0x9800
mii -i 2 1
phyid:2, reg:0x01 -> 0xde04
mii -i 2 0 0x9803
mii -i 2 1
phyid:2, reg:0x01 -> 0x3901
mii -i 2 1 0x1883
mii -i 2 1
phyid:2, reg:0x01 -> 0x1883

Here is the device tree for our board:
&mdio0 {
        switch0: switch0@2 {
                compatible = "marvell,mv88e6190";
                reg = <2>;
                pinctrl-0 = <&pinctrl_gpios>;
                reset-gpios = <&gpio4 16 GPIO_ACTIVE_LOW>;

                dsa,member = <0 0>;

                ports {
                        #address-cells = <1>;
                        #size-cells = <0>;

                        port@0 {
                                reg = <0>;
                                label = "cpu";
                                ethernet = <&fec1>;
                                phy-mode = "rmii";
                                fixed-link {
                                        speed = <100>;
                                        full-duplex;
                                };
                        };

                        port@1 {
                                reg = <1>;
                                label = "lan1";
                        };
                        port@2 {
                                reg = <2>;
                                label = "lan2";
                        };

                        port@3 {
                                reg = <3>;
                                label = "lan3";
                        };

                        port@4 {
                                reg = <4>;
                                label = "lan4";
                        };

                        port@5 {
                                reg = <5>;
                                label = "lan5";
                        };

                        port@6 {
                                reg = <6>;
                                label = "lan6";
                        };

                        port@7 {
                                reg = <7>;
                                label = "lan7";
                        };
                        port@8 {
                                reg = <8>;
                                label = "lan8";
                        };
                        port@9 {
                                reg = <9>;
                                label = "serdes1";
                                fixed-link {
                                        speed = <1000>;
                                        full-duplex;
                                };
                        };
                        port@10 {
                                reg = <10>;
                                label = "serdes2";
                                fixed-link {
                                        speed = <1000>;
                                        full-duplex;
                                };
                        };
                };
        };
};

On a different custom board we have another switching chip in single chip 
addressing mode the MDIO access works like a charm with activated DSA.

Currently I'm on linux-4.14.118. Other kernels (4.19.55, 5.1.14) I've 
tested stuck at or reboot while DSA is loading. Same devicetree there.
Let me know if you need some more input.

Thanks in advance for your help.

Best regards, 
Benjamin Beckmeyer


^ permalink raw reply	[flat|nested] 13+ messages in thread
* Re: i.mx6ul with DSA in multi chip addressing mode - no MDIO access
  2019-07-03 13:10 i.mx6ul with DSA in multi chip addressing mode - no MDIO access Benjamin Beckmeyer
@ 2019-07-03 15:55 ` Andrew Lunn
  2019-07-04  4:33   ` Benjamin Beckmeyer
  2019-07-04  8:54   ` Benjamin Beckmeyer
  0 siblings, 2 replies; 13+ messages in thread
From: Andrew Lunn @ 2019-07-03 15:55 UTC (permalink / raw)
  To: Benjamin Beckmeyer; +Cc: netdev

On Wed, Jul 03, 2019 at 03:10:34PM +0200, Benjamin Beckmeyer wrote:
> Hey folks,
> 
> I'm having a problem with a custom i.mx6ul board. When DSA is loaded I can't 
> get access to the switch via MDIO, but the DSA is working properly. I set up
> a bridge for testing and the switch is in forwarding mode and i can ping the 
> board. But the MDIO access isn't working at address 2 for the switch. When I 
> delete the DSA from the devicetree and start the board up, I can access the 
> switch via MDIO.
> 
> With DSA up and running:
> 
> mii -i 2 0 0x9800
> mii -i 2 1
> phyid:2, reg:0x01 -> 0x4000
> mii -i 2 0 0x9803
> mii -i 2 1
> phyid:2, reg:0x01 -> 0x4000
> mii -i 2 1 0x1883
> mii -i 2 1
> phyid:2, reg:0x01 -> 0x4000

Hi Benjamin

I'm guessing that the driver is also using register 0 and 1 at the
same time you are, e.g. to poll the PHYs for link status etc.

There are trace points for MDIO, so you can get the kernel to log all
registers access. That should confirm if i'm right.

	  Andrew

^ permalink raw reply	[flat|nested] 13+ messages in thread
* Re: i.mx6ul with DSA in multi chip addressing mode - no MDIO access
  2019-07-03 15:55 ` Andrew Lunn
@ 2019-07-04  4:33   ` Benjamin Beckmeyer
  2019-07-04  8:54   ` Benjamin Beckmeyer
  1 sibling, 0 replies; 13+ messages in thread
From: Benjamin Beckmeyer @ 2019-07-04  4:33 UTC (permalink / raw)
  To: Andrew Lunn; +Cc: netdev


On 03.07.19 17:55, Andrew Lunn wrote:
> On Wed, Jul 03, 2019 at 03:10:34PM +0200, Benjamin Beckmeyer wrote:
>> Hey folks,
>>
>> I'm having a problem with a custom i.mx6ul board. When DSA is loaded I can't 
>> get access to the switch via MDIO, but the DSA is working properly. I set up
>> a bridge for testing and the switch is in forwarding mode and i can ping the 
>> board. But the MDIO access isn't working at address 2 for the switch. When I 
>> delete the DSA from the devicetree and start the board up, I can access the 
>> switch via MDIO.
>>
>> With DSA up and running:
>>
>> mii -i 2 0 0x9800
>> mii -i 2 1
>> phyid:2, reg:0x01 -> 0x4000
>> mii -i 2 0 0x9803
>> mii -i 2 1
>> phyid:2, reg:0x01 -> 0x4000
>> mii -i 2 1 0x1883
>> mii -i 2 1
>> phyid:2, reg:0x01 -> 0x4000
> Hi Benjamin
>
> I'm guessing that the driver is also using register 0 and 1 at the
> same time you are, e.g. to poll the PHYs for link status etc.
>
> There are trace points for MDIO, so you can get the kernel to log all
> registers access. That should confirm if i'm right.
>
> 	  Andrew

Hi Andrew,
I will do so. Haven't done it before, so maybe it takes some time.

I'm just wondering why I haven't these problems with another switching
chip. Here we use the 88E6390 in multi chip addressing mode, in the 
other custom board we have a 88E6321 in single chip addressing mode, 
but there the registers would be polled too. Maybe you know a answer?

Thanks again for your fast reply.


^ permalink raw reply	[flat|nested] 13+ messages in thread
* Re: i.mx6ul with DSA in multi chip addressing mode - no MDIO access
  2019-07-03 15:55 ` Andrew Lunn
  2019-07-04  4:33   ` Benjamin Beckmeyer
@ 2019-07-04  8:54   ` Benjamin Beckmeyer
  2019-07-04 13:27     ` Andrew Lunn
  1 sibling, 1 reply; 13+ messages in thread
From: Benjamin Beckmeyer @ 2019-07-04  8:54 UTC (permalink / raw)
  To: Andrew Lunn; +Cc: netdev


On 03.07.19 17:55, Andrew Lunn wrote:
> On Wed, Jul 03, 2019 at 03:10:34PM +0200, Benjamin Beckmeyer wrote:
>> Hey folks,
>>
>> I'm having a problem with a custom i.mx6ul board. When DSA is loaded I can't 
>> get access to the switch via MDIO, but the DSA is working properly. I set up
>> a bridge for testing and the switch is in forwarding mode and i can ping the 
>> board. But the MDIO access isn't working at address 2 for the switch. When I 
>> delete the DSA from the devicetree and start the board up, I can access the 
>> switch via MDIO.
>>
>> With DSA up and running:
>>
>> mii -i 2 0 0x9800
>> mii -i 2 1
>> phyid:2, reg:0x01 -> 0x4000
>> mii -i 2 0 0x9803
>> mii -i 2 1
>> phyid:2, reg:0x01 -> 0x4000
>> mii -i 2 1 0x1883
>> mii -i 2 1
>> phyid:2, reg:0x01 -> 0x4000
> Hi Benjamin
>
> I'm guessing that the driver is also using register 0 and 1 at the
> same time you are, e.g. to poll the PHYs for link status etc.
>
> There are trace points for MDIO, so you can get the kernel to log all
> registers access. That should confirm if i'm right.
>
> 	  Andrew

Hi Andrew,
you were absolutly right. The bus is really busy the whole time, I've 
checked that with the tracepoints in mdio_access.

But I'm still wondering why isn't that with a single chip addressing 
mode configured switch? I mean, okay, the switch has more ports, but
I've checked the accesses for both. The 6321(single chip addressing 
mode) has around 4-5 accesses to the MDIO bus and the 6390(multi chip 
addressing mode) has around 600 accesses per second. 

Thanks, 
Benjamin


^ permalink raw reply	[flat|nested] 13+ messages in thread
* Re: i.mx6ul with DSA in multi chip addressing mode - no MDIO access
  2019-07-04  8:54   ` Benjamin Beckmeyer
@ 2019-07-04 13:27     ` Andrew Lunn
  2019-07-04 14:39       ` Benjamin Beckmeyer
  0 siblings, 1 reply; 13+ messages in thread
From: Andrew Lunn @ 2019-07-04 13:27 UTC (permalink / raw)
  To: Benjamin Beckmeyer; +Cc: netdev

On Thu, Jul 04, 2019 at 10:54:47AM +0200, Benjamin Beckmeyer wrote:
> 
> On 03.07.19 17:55, Andrew Lunn wrote:
> > On Wed, Jul 03, 2019 at 03:10:34PM +0200, Benjamin Beckmeyer wrote:
> >> Hey folks,
> >>
> >> I'm having a problem with a custom i.mx6ul board. When DSA is loaded I can't 
> >> get access to the switch via MDIO, but the DSA is working properly. I set up
> >> a bridge for testing and the switch is in forwarding mode and i can ping the 
> >> board. But the MDIO access isn't working at address 2 for the switch. When I 
> >> delete the DSA from the devicetree and start the board up, I can access the 
> >> switch via MDIO.
> >>
> >> With DSA up and running:
> >>
> >> mii -i 2 0 0x9800
> >> mii -i 2 1
> >> phyid:2, reg:0x01 -> 0x4000
> >> mii -i 2 0 0x9803
> >> mii -i 2 1
> >> phyid:2, reg:0x01 -> 0x4000
> >> mii -i 2 1 0x1883
> >> mii -i 2 1
> >> phyid:2, reg:0x01 -> 0x4000
> > Hi Benjamin
> >
> > I'm guessing that the driver is also using register 0 and 1 at the
> > same time you are, e.g. to poll the PHYs for link status etc.
> >
> > There are trace points for MDIO, so you can get the kernel to log all
> > registers access. That should confirm if i'm right.
> >
> > 	  Andrew
> 
> Hi Andrew,
> you were absolutly right. The bus is really busy the whole time, I've 
> checked that with the tracepoints in mdio_access.
> 
> But I'm still wondering why isn't that with a single chip addressing 
> mode configured switch? I mean, okay, the switch has more ports, but
> I've checked the accesses for both. The 6321(single chip addressing 
> mode) has around 4-5 accesses to the MDIO bus and the 6390(multi chip 
> addressing mode) has around 600 accesses per second. 

Hi Benjamin

In single chip mode, reading a register is atomic. With multi-chip,
you need to access two registers, so it clearly is not atomic. And so
any other action on the bus will cause you problems when doing things
from user space without being able to take the register mutex.

But 4-5 vs 600 suggests you don't have the interrupt line in your
device tree. If you have the interrupt line connected to a GPIO, and
the driver knows about it, it has no need to poll the PHYs. I also
added support for 'polled interrupts', as a fall back when then
interrupt is not listed in device tree. 10 times a second the driver
polls the interrupt status register, and if any interrupts have
happened within the switch, it triggers the needed handlers. Reading
one status register every 100ms is much less effort than reading all
the PHY status registers once per second.

Still, 600 per second sounds too high. Do you have an SNMP agent
getting statistics?

	Andrew

^ permalink raw reply	[flat|nested] 13+ messages in thread
* Re: i.mx6ul with DSA in multi chip addressing mode - no MDIO access
  2019-07-04 13:27     ` Andrew Lunn
@ 2019-07-04 14:39       ` Benjamin Beckmeyer
  2019-07-04 15:53         ` Andrew Lunn
  0 siblings, 1 reply; 13+ messages in thread
From: Benjamin Beckmeyer @ 2019-07-04 14:39 UTC (permalink / raw)
  To: Andrew Lunn; +Cc: netdev

> On Thu, Jul 04, 2019 at 10:54:47AM +0200, Benjamin Beckmeyer wrote:
>> On 03.07.19 17:55, Andrew Lunn wrote:
>>> On Wed, Jul 03, 2019 at 03:10:34PM +0200, Benjamin Beckmeyer wrote:
>>>> Hey folks,
>>>>
>>>> I'm having a problem with a custom i.mx6ul board. When DSA is loaded I can't 
>>>> get access to the switch via MDIO, but the DSA is working properly. I set up
>>>> a bridge for testing and the switch is in forwarding mode and i can ping the 
>>>> board. But the MDIO access isn't working at address 2 for the switch. When I 
>>>> delete the DSA from the devicetree and start the board up, I can access the 
>>>> switch via MDIO.
>>>>
>>>> With DSA up and running:
>>>>
>>>> mii -i 2 0 0x9800
>>>> mii -i 2 1
>>>> phyid:2, reg:0x01 -> 0x4000
>>>> mii -i 2 0 0x9803
>>>> mii -i 2 1
>>>> phyid:2, reg:0x01 -> 0x4000
>>>> mii -i 2 1 0x1883
>>>> mii -i 2 1
>>>> phyid:2, reg:0x01 -> 0x4000
>>> Hi Benjamin
>>>
>>> I'm guessing that the driver is also using register 0 and 1 at the
>>> same time you are, e.g. to poll the PHYs for link status etc.
>>>
>>> There are trace points for MDIO, so you can get the kernel to log all
>>> registers access. That should confirm if i'm right.
>>>
>>> 	  Andrew
>> Hi Andrew,
>> you were absolutly right. The bus is really busy the whole time, I've 
>> checked that with the tracepoints in mdio_access.
>>
>> But I'm still wondering why isn't that with a single chip addressing 
>> mode configured switch? I mean, okay, the switch has more ports, but
>> I've checked the accesses for both. The 6321(single chip addressing 
>> mode) has around 4-5 accesses to the MDIO bus and the 6390(multi chip 
>> addressing mode) has around 600 accesses per second. 
> Hi Benjamin
>
> In single chip mode, reading a register is atomic. With multi-chip,
> you need to access two registers, so it clearly is not atomic. And so
> any other action on the bus will cause you problems when doing things
> from user space without being able to take the register mutex.
>
> But 4-5 vs 600 suggests you don't have the interrupt line in your
> device tree. If you have the interrupt line connected to a GPIO, and
> the driver knows about it, it has no need to poll the PHYs. I also
> added support for 'polled interrupts', as a fall back when then
> interrupt is not listed in device tree. 10 times a second the driver
> polls the interrupt status register, and if any interrupts have
> happened within the switch, it triggers the needed handlers. Reading
> one status register every 100ms is much less effort than reading all
> the PHY status registers once per second.
>
> Still, 600 per second sounds too high. Do you have an SNMP agent
> getting statistics?
>
> 	Andrew

Hi Andrew,
thanks for the hint with the interrupt line. I added it now but I'm 
having the same problem. But it is older kernel and tomorrow I will try
a newer kernel in which your patch with the polled setup is applied to.
And I will get an oscilloscop to look if anything is happening on the 
interrupt line. 

Is this device tree snip correct (about interrupts)?

--snip

&fec1 {
        pinctrl-names = "default";
        pinctrl-0 = <&pinctrl_enet1>;
        reset-gpios = <&gpio5 9 GPIO_ACTIVE_LOW>;
        phy-supply = <&reg_3v3>;
        phy-mode = "rmii";
        phy-handle = <&fecphy1>;
        status = "okay";

        mdio0: mdio {
                #address-cells = <1>;
                #size-cells = <0>;

                fecphy1: fecphy1@1 {
                        reg = <0x1>;
                };
        };
};

&mdio0 {
        interrupt-parent = <&gpio1>;
        interrupts = <3 IRQ_TYPE_LEVEL_HIGH>;

        switch0: switch0@2 {
                compatible = "marvell,mv88e6190";
                reg = <2>;
                pinctrl-0 = <&pinctrl_gpios>;
                reset-gpios = <&gpio4 16 GPIO_ACTIVE_LOW>;
                dsa,member = <0 0>;

                ports {
                        #address-cells = <1>;
                        #size-cells = <0>;

                        port@0 {
                                reg = <0>;
                                label = "cpu";
                                ethernet = <&fec1>;
                                phy-mode = "rmii";
                                fixed-link {
                                        speed = <100>;
                                        full-duplex;
                                };
                        };

--snip

There is no SNMP agent running at all.

Cheers, 
Benjamin


^ permalink raw reply	[flat|nested] 13+ messages in thread
* Re: i.mx6ul with DSA in multi chip addressing mode - no MDIO access
  2019-07-04 14:39       ` Benjamin Beckmeyer
@ 2019-07-04 15:53         ` Andrew Lunn
  2019-07-05 12:41           ` Benjamin Beckmeyer
  0 siblings, 1 reply; 13+ messages in thread
From: Andrew Lunn @ 2019-07-04 15:53 UTC (permalink / raw)
  To: Benjamin Beckmeyer; +Cc: netdev

> &mdio0 {
>         interrupt-parent = <&gpio1>;
>         interrupts = <3 IRQ_TYPE_LEVEL_HIGH>;
> 
>         switch0: switch0@2 {
>                 compatible = "marvell,mv88e6190";
>                 reg = <2>;
>                 pinctrl-0 = <&pinctrl_gpios>;
>                 reset-gpios = <&gpio4 16 GPIO_ACTIVE_LOW>;
>                 dsa,member = <0 0>;

This is wrong. The interrupt is a switch property, not an MDIO bus
property. So it belongs inside the switch node.

	  Andrew

^ permalink raw reply	[flat|nested] 13+ messages in thread
* Re: i.mx6ul with DSA in multi chip addressing mode - no MDIO access
  2019-07-04 15:53         ` Andrew Lunn
@ 2019-07-05 12:41           ` Benjamin Beckmeyer
  2019-07-05 14:36             ` Andrew Lunn
  0 siblings, 1 reply; 13+ messages in thread
From: Benjamin Beckmeyer @ 2019-07-05 12:41 UTC (permalink / raw)
  To: Andrew Lunn; +Cc: netdev

>> &mdio0 {
>>         interrupt-parent = <&gpio1>;
>>         interrupts = <3 IRQ_TYPE_LEVEL_HIGH>;
>>
>>         switch0: switch0@2 {
>>                 compatible = "marvell,mv88e6190";
>>                 reg = <2>;
>>                 pinctrl-0 = <&pinctrl_gpios>;
>>                 reset-gpios = <&gpio4 16 GPIO_ACTIVE_LOW>;
>>                 dsa,member = <0 0>;
> This is wrong. The interrupt is a switch property, not an MDIO bus
> property. So it belongs inside the switch node.
>
> 	  Andrew

Hi Andrew,

in the documentation for Marvell DSA the interrupt properties are in 
the MDIO part. Maybe the documentation for device tree is wrong or 
unclear?

I switched to the kernel 5.1.16 to take advantage of your new code.
At the moment I deleted all interrupt properties from my device tree 
and if I get you right now the access should be trigger all 100ms but 
I have accesses within the tracing about 175 times a second.

Here is a snip from my trace without IRQ
2188000.etherne-223   [000] ....   109.932406: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x01 val:0x40a8
 2188000.etherne-223   [000] ....   109.932501: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1b64
 2188000.etherne-223   [000] ....   109.933113: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9b60
 2188000.etherne-223   [000] ....   109.933261: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1b60
 2188000.etherne-223   [000] ....   109.933359: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x01 val:0xc801
 2188000.etherne-223   [000] ....   110.041683: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1b60
 2188000.etherne-223   [000] ....   110.041817: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9b60
 2188000.etherne-223   [000] ....   110.041919: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1b60
 2188000.etherne-223   [000] ....   110.042025: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x01 val:0xc801

Am I doing it right with the tracing points? I run just

echo 1 > /sys/kernel/debug/tracing/events/mdio/mdio_access/enable
cat /sys/kernel/debug/tracing/trace

Here is the another device tree I tried, but with this I get accesses 
on the bus in about every 50 microseconds!

--snip
&mdio0 {
        switch0: switch0@2 {
                compatible = "marvell,mv88e6190";
                reg = <2>;
                pinctrl-0 = <&pinctrl_switch_irq>;
                interrupt-parent = <&gpio1>;
                interrupts = <3 IRQ_TYPE_LEVEL_LOW>;
                interrupt-controller;
                #interrupt-cells = <2>;
                dsa,member = <0 0>;

                ports {
                        #address-cells = <1>;
                        #size-cells = <0>;
--snip

Here is a snip from my trace with IRQ.
irq/54-2188000.-223   [000] ....   958.940744: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1b64
 irq/54-2188000.-223   [000] ....   958.940800: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9b60
 irq/54-2188000.-223   [000] ....   958.940857: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1b60
 irq/54-2188000.-223   [000] ....   958.940914: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x01 val:0xc801
 irq/54-2188000.-223   [000] ....   958.940984: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1b60
 irq/54-2188000.-223   [000] ....   958.941043: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9b60
 irq/54-2188000.-223   [000] ....   958.941100: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1b60
 irq/54-2188000.-223   [000] ....   958.941158: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x01 val:0xc801
 irq/54-2188000.-223   [000] ....   958.941218: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1b60
 irq/54-2188000.-223   [000] ....   958.941276: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9b64

Thanks,
Benny


^ permalink raw reply	[flat|nested] 13+ messages in thread
* Re: i.mx6ul with DSA in multi chip addressing mode - no MDIO access
  2019-07-05 12:41           ` Benjamin Beckmeyer
@ 2019-07-05 14:36             ` Andrew Lunn
  2019-07-08 13:55               ` Benjamin Beckmeyer
  0 siblings, 1 reply; 13+ messages in thread
From: Andrew Lunn @ 2019-07-05 14:36 UTC (permalink / raw)
  To: Benjamin Beckmeyer; +Cc: netdev

On Fri, Jul 05, 2019 at 02:41:43PM +0200, Benjamin Beckmeyer wrote:
> >> &mdio0 {
> >>         interrupt-parent = <&gpio1>;
> >>         interrupts = <3 IRQ_TYPE_LEVEL_HIGH>;
> >>
> >>         switch0: switch0@2 {
> >>                 compatible = "marvell,mv88e6190";
> >>                 reg = <2>;
> >>                 pinctrl-0 = <&pinctrl_gpios>;
> >>                 reset-gpios = <&gpio4 16 GPIO_ACTIVE_LOW>;
> >>                 dsa,member = <0 0>;
> > This is wrong. The interrupt is a switch property, not an MDIO bus
> > property. So it belongs inside the switch node.
> >
> > 	  Andrew
> 
> Hi Andrew,
> 
> in the documentation for Marvell DSA the interrupt properties are in 
> the MDIO part. Maybe the documentation for device tree is wrong or 
> unclear?

Ah. Yes. The documentation is wrong. I will fix that.

> 
> I switched to the kernel 5.1.16 to take advantage of your new code.
> At the moment I deleted all interrupt properties from my device tree 
> and if I get you right now the access should be trigger all 100ms but 
> I have accesses within the tracing about 175 times a second.
> 
> Here is a snip from my trace without IRQ
> 2188000.etherne-223   [000] ....   109.932406: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x01 val:0x40a8
>  2188000.etherne-223   [000] ....   109.932501: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1b64
>  2188000.etherne-223   [000] ....   109.933113: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9b60
>  2188000.etherne-223   [000] ....   109.933261: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1b60
>  2188000.etherne-223   [000] ....   109.933359: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x01 val:0xc801

>  2188000.etherne-223   [000] ....   110.041683: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1b60
>  2188000.etherne-223   [000] ....   110.041817: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9b60
>  2188000.etherne-223   [000] ....   110.041919: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1b60
>  2188000.etherne-223   [000] ....   110.042025: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x01 val:0xc801

These four access are one switch register access. The first read will
be checking that the busy bit is not set. The second sets up a read to
switch register 0x00 device address 1b, i.e. global 1. So this is the
interrupt status register. The third read is checking that the busy
bit is cleared. And the last is the actual value of the register.

> 
> Am I doing it right with the tracing points? I run just
> 
> echo 1 > /sys/kernel/debug/tracing/events/mdio/mdio_access/enable
> cat /sys/kernel/debug/tracing/trace

That looks correct.

I think you are going to have to parse the register writes/reads to
figure out what switch registers it is accessing. That should
hopefully make it clearer why it is making so many accesses.

> Here is the another device tree I tried, but with this I get accesses 
> on the bus in about every 50 microseconds!
> 
> --snip
> &mdio0 {
>         switch0: switch0@2 {
>                 compatible = "marvell,mv88e6190";
>                 reg = <2>;
>                 pinctrl-0 = <&pinctrl_switch_irq>;
>                 interrupt-parent = <&gpio1>;
>                 interrupts = <3 IRQ_TYPE_LEVEL_LOW>;
>                 interrupt-controller;
>                 #interrupt-cells = <2>;
>                 dsa,member = <0 0>;
> 
>                 ports {
>                         #address-cells = <1>;
>                         #size-cells = <0>;
> --snip

That looks sensible.

     Andrew

^ permalink raw reply	[flat|nested] 13+ messages in thread
* Re: i.mx6ul with DSA in multi chip addressing mode - no MDIO access
  2019-07-05 14:36             ` Andrew Lunn
@ 2019-07-08 13:55               ` Benjamin Beckmeyer
  2019-07-08 14:57                 ` Andrew Lunn
  0 siblings, 1 reply; 13+ messages in thread
From: Benjamin Beckmeyer @ 2019-07-08 13:55 UTC (permalink / raw)
  To: Andrew Lunn; +Cc: netdev

> I think you are going to have to parse the register writes/reads to
> figure out what switch registers it is accessing. That should
> hopefully make it clearer why it is making so many accesses.

Hi Andrew,
I got it working a little bit better. When I'm fast enough I can read
the registers I want but it isn't a solution.

Here is an output of the tracing even with my custom accesses.
mii -i 2 0 0x9b60; mii -i 2 1
phyid:2, reg:0x01 -> 0xc801

Do you know how to delete EEInt bit? It is always one. And now all 
accesses coming from the kworker thread. Maybe this is your polling 
function?

I view the INT pin on an oscilloscope but it never changed. So maybe
this is the problem. We just soldered a pull-up to that pin but it 
still never changend. Maybe you have an idea?

So what I think is, because of the EEInt bit is never set back to one 
i will poll it as fast as possible.

root@DistroKit:~ cat /sys/kernel/debug/tracing/trace
# tracer: nop
#
# entries-in-buffer/entries-written: 568/568   #P:1
#
#                              _-----=> irqs-off
#                             / _----=> need-resched
#                            | / _---=> hardirq/softirq
#                            || / _--=> preempt-depth
#                            ||| /     delay
#           TASK-PID   CPU#  ||||    TIMESTAMP  FUNCTION
#              | |       |   ||||       |         |
     kworker/0:2-106   [000] ....   209.532531: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1521
     kworker/0:2-106   [000] ....   209.532649: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9941
     kworker/0:2-106   [000] ....   209.532741: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1941
     kworker/0:2-106   [000] ....   209.532835: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x01 val:0x203e
     kworker/0:2-106   [000] ....   209.532937: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1941
     kworker/0:2-106   [000] ....   209.533027: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x01 val:0x201e
     kworker/0:2-106   [000] ....   209.533632: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9541
     kworker/0:2-106   [000] ....   209.533765: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1541
     kworker/0:2-106   [000] ....   209.533875: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1541
     kworker/0:2-106   [000] ....   209.534470: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9941
     kworker/0:2-106   [000] ....   209.534603: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1941
     kworker/0:2-106   [000] ....   209.534695: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x01 val:0x201e
     kworker/0:2-106   [000] ....   209.535296: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1941
     kworker/0:2-106   [000] ....   209.535429: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x01 val:0x201e
     kworker/0:2-106   [000] ....   209.535529: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9541
     kworker/0:2-106   [000] ....   209.536129: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1541
     kworker/0:2-106   [000] ....   209.536266: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1541
     kworker/0:2-106   [000] ....   209.536364: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9941
     kworker/0:2-106   [000] ....   209.536955: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1941
     kworker/0:2-106   [000] ....   209.537097: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x01 val:0x201e
     kworker/0:2-106   [000] ....   209.537194: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1941
     kworker/0:2-106   [000] ....   209.537355: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x01 val:0x201e
     kworker/0:2-106   [000] ....   209.537487: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9541
     kworker/0:2-106   [000] ....   209.537608: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1541
     kworker/0:2-106   [000] ....   209.537739: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1541
     kworker/0:2-106   [000] ....   209.537890: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9941
     kworker/0:2-106   [000] ....   209.540203: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1941
     kworker/0:2-106   [000] ....   209.540323: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x01 val:0x201e
     kworker/0:2-106   [000] ....   209.540469: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1941
     kworker/0:2-106   [000] ....   209.540568: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x01 val:0x203e
     kworker/0:2-106   [000] ....   209.540666: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9541
     kworker/0:2-106   [000] ....   209.540768: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1541
     kworker/0:2-106   [000] ....   210.491498: mdio_access: 2188000.ethernet-1 read  phy:0x01 reg:0x01 val:0x786d
     kworker/0:2-106   [000] ....   210.491619: mdio_access: 2188000.ethernet-1 read  phy:0x01 reg:0x05 val:0x0080
     kworker/0:2-106   [000] ....   210.491762: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1541
     kworker/0:2-106   [000] ....   210.491860: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9921
     kworker/0:2-106   [000] ....   210.491953: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1921
     kworker/0:2-106   [000] ....   210.492052: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x01 val:0x203e
     kworker/0:2-106   [000] ....   210.492146: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1921
     kworker/0:2-106   [000] ....   210.492244: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x01 val:0x201e
     kworker/0:2-106   [000] ....   210.492332: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9521
     kworker/0:2-106   [000] ....   210.493008: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1521
     kworker/0:2-106   [000] ....   210.493160: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1521
     kworker/0:2-106   [000] ....   210.493252: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9921
     kworker/0:2-106   [000] ....   210.493342: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1921
     kworker/0:2-106   [000] ....   210.494000: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x01 val:0x201e
     kworker/0:2-106   [000] ....   210.494137: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1921
     kworker/0:2-106   [000] ....   210.494236: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x01 val:0x201e
     kworker/0:2-106   [000] ....   210.494914: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9521
     kworker/0:2-106   [000] ....   210.495050: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1521
     kworker/0:2-106   [000] ....   210.495156: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1521
     kworker/0:2-106   [000] ....   210.495823: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9921
     kworker/0:2-106   [000] ....   210.495958: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1921
     kworker/0:2-106   [000] ....   210.496052: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x01 val:0x201e
     kworker/0:2-106   [000] ....   210.496646: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1921
     kworker/0:2-106   [000] ....   210.496781: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x01 val:0x201e
     kworker/0:2-106   [000] ....   210.496876: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9521
     kworker/0:2-106   [000] ....   210.497466: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1521
     kworker/0:2-106   [000] ....   210.497615: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1521
     kworker/0:2-106   [000] ....   210.497715: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9921
     kworker/0:2-106   [000] ....   210.497870: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1921
     kworker/0:2-106   [000] ....   210.498433: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x01 val:0x201e
     kworker/0:2-106   [000] ....   210.498582: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1921
     kworker/0:2-106   [000] ....   210.498843: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x01 val:0x203e
     kworker/0:2-106   [000] ....   210.498948: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9521
     kworker/0:2-106   [000] ....   210.499519: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1521
     kworker/0:1-14    [000] ....   210.572569: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1521
     kworker/0:1-14    [000] ....   210.572687: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9941
     kworker/0:1-14    [000] ....   210.572790: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1941
     kworker/0:1-14    [000] ....   210.572884: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x01 val:0x203e
     kworker/0:1-14    [000] ....   210.573502: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1941
     kworker/0:1-14    [000] ....   210.573653: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x01 val:0x201e
     kworker/0:1-14    [000] ....   210.573747: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9541
     kworker/0:1-14    [000] ....   210.573844: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1541
     kworker/0:1-14    [000] ....   210.574447: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1541
     kworker/0:1-14    [000] ....   210.574585: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9941
     kworker/0:1-14    [000] ....   210.574682: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1941
     kworker/0:1-14    [000] ....   210.575275: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x01 val:0x201e
     kworker/0:1-14    [000] ....   210.575412: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1941
     kworker/0:1-14    [000] ....   210.575514: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x01 val:0x201e
     kworker/0:1-14    [000] ....   210.576103: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9541
     kworker/0:1-14    [000] ....   210.576242: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1541
     kworker/0:1-14    [000] ....   210.576346: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1541
     kworker/0:1-14    [000] ....   210.576502: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9941
     kworker/0:1-14    [000] ....   210.576596: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1941
     kworker/0:1-14    [000] ....   210.576723: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x01 val:0x201e
     kworker/0:1-14    [000] ....   210.576850: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1941
     kworker/0:1-14    [000] ....   210.576978: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x01 val:0x201e
     kworker/0:1-14    [000] ....   210.577073: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9541
     kworker/0:1-14    [000] ....   210.577201: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1541
     kworker/0:1-14    [000] ....   210.577328: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1541
     kworker/0:1-14    [000] ....   210.577452: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9941
     kworker/0:1-14    [000] ....   210.577651: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1941
     kworker/0:1-14    [000] ....   210.577780: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x01 val:0x201e
     kworker/0:1-14    [000] ....   210.580149: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1941
     kworker/0:1-14    [000] ....   210.580261: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x01 val:0x203e
     kworker/0:1-14    [000] ....   210.580365: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9541
     kworker/0:1-14    [000] ....   210.580509: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1541
             mii-387   [000] ....   210.646652: mdio_access: 2188000.ethernet-1 write phy:0x22 reg:0x00 val:0x9b60
             mii-388   [000] ....   210.659304: mdio_access: 2188000.ethernet-1 read  phy:0x22 reg:0x01 val:0xc801
     kworker/0:2-106   [000] ....   211.531394: mdio_access: 2188000.ethernet-1 read  phy:0x01 reg:0x01 val:0x786d
     kworker/0:2-106   [000] ....   211.531526: mdio_access: 2188000.ethernet-1 read  phy:0x01 reg:0x05 val:0x0080
     kworker/0:2-106   [000] ....   211.531725: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1b60
     kworker/0:2-106   [000] ....   211.531835: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9921
     kworker/0:2-106   [000] ....   211.531936: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1921
     kworker/0:2-106   [000] ....   211.532033: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x01 val:0x203e
     kworker/0:2-106   [000] ....   211.532131: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1921
     kworker/0:2-106   [000] ....   211.532223: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x01 val:0x201e
     kworker/0:2-106   [000] ....   211.532316: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9521
     kworker/0:2-106   [000] ....   211.532486: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1521
     kworker/0:2-106   [000] ....   211.532603: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1521
     kworker/0:2-106   [000] ....   211.532707: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9921
     kworker/0:2-106   [000] ....   211.532806: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1921
     kworker/0:2-106   [000] ....   211.532902: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x01 val:0x201e
     kworker/0:2-106   [000] ....   211.532993: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1921
     kworker/0:2-106   [000] ....   211.533683: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x01 val:0x201e
     kworker/0:2-106   [000] ....   211.533832: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9521
     kworker/0:2-106   [000] ....   211.533939: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1521
     kworker/0:2-106   [000] ....   211.534613: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1521
     kworker/0:2-106   [000] ....   211.534754: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9921
     kworker/0:2-106   [000] ....   211.535418: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1921
     kworker/0:2-106   [000] ....   211.535550: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x01 val:0x201e
     kworker/0:2-106   [000] ....   211.535647: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1921
     kworker/0:2-106   [000] ....   211.536398: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x01 val:0x201e
     kworker/0:2-106   [000] ....   211.536524: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9521
     kworker/0:2-106   [000] ....   211.536629: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1521
     kworker/0:2-106   [000] ....   211.537235: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1521
     kworker/0:2-106   [000] ....   211.537373: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9921
     kworker/0:2-106   [000] ....   211.537467: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1921
     kworker/0:2-106   [000] ....   211.538068: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x01 val:0x201e
     kworker/0:2-106   [000] ....   211.538209: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1921
     kworker/0:2-106   [000] ....   211.538310: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x01 val:0x203e
     kworker/0:2-106   [000] ....   211.538472: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9521
     kworker/0:2-106   [000] ....   211.538564: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1521
     kworker/0:1-14    [000] ....   211.612565: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1521
     kworker/0:1-14    [000] ....   211.612685: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9941
     kworker/0:1-14    [000] ....   211.612776: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1941
     kworker/0:1-14    [000] ....   211.612876: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x01 val:0x203e
     kworker/0:1-14    [000] ....   211.612964: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1941
     kworker/0:1-14    [000] ....   211.613580: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x01 val:0x201e
     kworker/0:1-14    [000] ....   211.613727: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9541
     kworker/0:1-14    [000] ....   211.613829: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1541
     kworker/0:1-14    [000] ....   211.613931: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1541
     kworker/0:1-14    [000] ....   211.614531: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9941
     kworker/0:1-14    [000] ....   211.614674: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1941
     kworker/0:1-14    [000] ....   211.614768: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x01 val:0x201e
     kworker/0:1-14    [000] ....   211.615374: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1941
     kworker/0:1-14    [000] ....   211.615505: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x01 val:0x201e
     kworker/0:1-14    [000] ....   211.615602: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9541
     kworker/0:1-14    [000] ....   211.616194: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1541
     kworker/0:1-14    [000] ....   211.616340: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1541
     kworker/0:1-14    [000] ....   211.616444: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9941
     kworker/0:1-14    [000] ....   211.616535: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1941
     kworker/0:1-14    [000] ....   211.616696: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x01 val:0x201e
     kworker/0:1-14    [000] ....   211.616795: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1941
     kworker/0:1-14    [000] ....   211.616925: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x01 val:0x201e
     kworker/0:1-14    [000] ....   211.617052: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9541
     kworker/0:1-14    [000] ....   211.617176: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1541
     kworker/0:1-14    [000] ....   211.617273: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1541
     kworker/0:1-14    [000] ....   211.617398: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9941
     kworker/0:1-14    [000] ....   211.617524: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1941
     kworker/0:1-14    [000] ....   211.617649: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x01 val:0x201e
     kworker/0:1-14    [000] ....   211.617775: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1941
     kworker/0:1-14    [000] ....   211.617959: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x01 val:0x203e
     kworker/0:1-14    [000] ....   211.620269: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9541
     kworker/0:1-14    [000] ....   211.620379: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1541
     kworker/0:2-106   [000] ....   212.571491: mdio_access: 2188000.ethernet-1 read  phy:0x01 reg:0x01 val:0x786d
     kworker/0:2-106   [000] ....   212.571624: mdio_access: 2188000.ethernet-1 read  phy:0x01 reg:0x05 val:0x0080
     kworker/0:2-106   [000] ....   212.571781: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1541
     kworker/0:2-106   [000] ....   212.571886: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9921
     kworker/0:2-106   [000] ....   212.571981: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1921
     kworker/0:2-106   [000] ....   212.572079: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x01 val:0x203e
     kworker/0:2-106   [000] ....   212.572181: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1921
     kworker/0:2-106   [000] ....   212.572272: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x01 val:0x201e
     kworker/0:2-106   [000] ....   212.572953: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9521
     kworker/0:2-106   [000] ....   212.573091: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1521
     kworker/0:2-106   [000] ....   212.573191: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1521
     kworker/0:2-106   [000] ....   212.573859: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9921
     kworker/0:2-106   [000] ....   212.573998: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1921
     kworker/0:2-106   [000] ....   212.574097: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x01 val:0x201e
     kworker/0:2-106   [000] ....   212.574756: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1921
     kworker/0:2-106   [000] ....   212.574899: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x01 val:0x201e
     kworker/0:2-106   [000] ....   212.575000: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9521
     kworker/0:2-106   [000] ....   212.575658: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1521
     kworker/0:2-106   [000] ....   212.575808: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1521
     kworker/0:2-106   [000] ....   212.575909: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9921
     kworker/0:2-106   [000] ....   212.576565: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1921
     kworker/0:2-106   [000] ....   212.576699: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x01 val:0x201e
     kworker/0:2-106   [000] ....   212.576797: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1921
     kworker/0:2-106   [000] ....   212.576890: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x01 val:0x201e
     kworker/0:2-106   [000] ....   212.576982: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9521
     kworker/0:2-106   [000] ....   212.577567: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1521
     kworker/0:2-106   [000] ....   212.577720: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1521
     kworker/0:2-106   [000] ....   212.577823: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9921
     kworker/0:2-106   [000] ....   212.577914: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1921
     kworker/0:2-106   [000] ....   212.578071: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x01 val:0x201e
     kworker/0:2-106   [000] ....   212.578641: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1921
     kworker/0:2-106   [000] ....   212.578876: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x01 val:0x203e
     kworker/0:2-106   [000] ....   212.578978: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9521
     kworker/0:2-106   [000] ....   212.579074: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1521
     kworker/0:1-14    [000] ....   212.652559: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1521
     kworker/0:1-14    [000] ....   212.652682: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9941
     kworker/0:1-14    [000] ....   212.652772: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1941
     kworker/0:1-14    [000] ....   212.652871: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x01 val:0x203e
     kworker/0:1-14    [000] ....   212.652965: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1941
     kworker/0:1-14    [000] ....   212.653054: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x01 val:0x201e
     kworker/0:1-14    [000] ....   212.653668: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9541
     kworker/0:1-14    [000] ....   212.653803: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1541
     kworker/0:1-14    [000] ....   212.653909: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1541
     kworker/0:1-14    [000] ....   212.654511: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9941
     kworker/0:1-14    [000] ....   212.654646: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1941
     kworker/0:1-14    [000] ....   212.654745: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x01 val:0x201e
     kworker/0:1-14    [000] ....   212.655343: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1941
     kworker/0:1-14    [000] ....   212.655485: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x01 val:0x201e
     kworker/0:1-14    [000] ....   212.655583: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9541
     kworker/0:1-14    [000] ....   212.655746: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1541
     kworker/0:1-14    [000] ....   212.655844: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1541
     kworker/0:1-14    [000] ....   212.655981: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9941
     kworker/0:1-14    [000] ....   212.656115: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1941
     kworker/0:1-14    [000] ....   212.656245: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x01 val:0x201e
     kworker/0:1-14    [000] ....   212.656381: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1941
     kworker/0:1-14    [000] ....   212.656514: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x01 val:0x201e
     kworker/0:1-14    [000] ....   212.656641: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9541
     kworker/0:1-14    [000] ....   212.656767: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1541
     kworker/0:1-14    [000] ....   212.656895: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1541
     kworker/0:1-14    [000] ....   212.657018: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9941
     kworker/0:1-14    [000] ....   212.657142: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1941
     kworker/0:1-14    [000] ....   212.657339: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x01 val:0x201e
     kworker/0:1-14    [000] ....   212.657471: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1941
     kworker/0:1-14    [000] ....   212.657595: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x01 val:0x203e
     kworker/0:1-14    [000] ....   212.657691: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9541
     kworker/0:1-14    [000] ....   212.657869: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1541
     kworker/0:2-106   [000] ....   213.611366: mdio_access: 2188000.ethernet-1 read  phy:0x01 reg:0x01 val:0x786d
     kworker/0:2-106   [000] ....   213.611493: mdio_access: 2188000.ethernet-1 read  phy:0x01 reg:0x05 val:0x0080
     kworker/0:2-106   [000] ....   213.611682: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1541
     kworker/0:2-106   [000] ....   213.611798: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9921
     kworker/0:2-106   [000] ....   213.611898: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1921
     kworker/0:2-106   [000] ....   213.611990: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x01 val:0x203e
     kworker/0:2-106   [000] ....   213.612086: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1921
     kworker/0:2-106   [000] ....   213.612179: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x01 val:0x201e
     kworker/0:2-106   [000] ....   213.612284: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9521
     kworker/0:2-106   [000] ....   213.612385: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1521
     kworker/0:2-106   [000] ....   213.612495: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1521
     kworker/0:2-106   [000] ....   213.612591: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9921
     kworker/0:2-106   [000] ....   213.612686: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1921
     kworker/0:2-106   [000] ....   213.612791: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x01 val:0x201e
     kworker/0:2-106   [000] ....   213.612887: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1921
     kworker/0:2-106   [000] ....   213.612982: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x01 val:0x201e
     kworker/0:2-106   [000] ....   213.613074: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9521
     kworker/0:2-106   [000] ....   213.613165: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1521
     kworker/0:2-106   [000] ....   213.613269: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1521
     kworker/0:2-106   [000] ....   213.613362: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9921
     kworker/0:2-106   [000] ....   213.613457: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1921
     kworker/0:2-106   [000] ....   213.613549: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x01 val:0x201e
     kworker/0:2-106   [000] ....   213.613642: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1921
     kworker/0:2-106   [000] ....   213.613733: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x01 val:0x201e
     kworker/0:2-106   [000] ....   213.613823: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9521
     kworker/0:2-106   [000] ....   213.613922: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1521
     kworker/0:2-106   [000] ....   213.614022: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1521
     kworker/0:2-106   [000] ....   213.614116: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9921
     kworker/0:2-106   [000] ....   213.614209: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1921
     kworker/0:2-106   [000] ....   213.614299: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x01 val:0x201e
     kworker/0:2-106   [000] ....   213.614390: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1921
     kworker/0:2-106   [000] ....   213.614482: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x01 val:0x203e
     kworker/0:2-106   [000] ....   213.614574: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9521
     kworker/0:2-106   [000] ....   213.614667: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1521
     kworker/0:1-14    [000] ....   213.692647: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1521
     kworker/0:1-14    [000] ....   213.692763: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9941
     kworker/0:1-14    [000] ....   213.692857: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1941
     kworker/0:1-14    [000] ....   213.692956: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x01 val:0x203e
     kworker/0:1-14    [000] ....   213.693052: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1941
     kworker/0:1-14    [000] ....   213.693137: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x01 val:0x201e
     kworker/0:1-14    [000] ....   213.693299: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9541
     kworker/0:1-14    [000] ....   213.693441: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1541
     kworker/0:1-14    [000] ....   213.693587: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1541
     kworker/0:1-14    [000] ....   213.693728: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9941
     kworker/0:1-14    [000] ....   213.693858: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1941
     kworker/0:1-14    [000] ....   213.693988: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x01 val:0x201e
     kworker/0:1-14    [000] ....   213.694108: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1941
     kworker/0:1-14    [000] ....   213.694231: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x01 val:0x201e
     kworker/0:1-14    [000] ....   213.694354: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9541
     kworker/0:1-14    [000] ....   213.694473: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1541
     kworker/0:1-14    [000] ....   213.694599: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1541
     kworker/0:1-14    [000] ....   213.694723: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9941
     kworker/0:1-14    [000] ....   213.694842: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1941
     kworker/0:1-14    [000] ....   213.694963: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x01 val:0x201e
     kworker/0:1-14    [000] ....   213.695087: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1941
     kworker/0:1-14    [000] ....   213.695211: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x01 val:0x201e
     kworker/0:1-14    [000] ....   213.695341: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9541
     kworker/0:1-14    [000] ....   213.695464: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1541
     kworker/0:1-14    [000] ....   213.695587: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1541
     kworker/0:1-14    [000] ....   213.695679: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9941
     kworker/0:1-14    [000] ....   213.695800: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1941
     kworker/0:1-14    [000] ....   213.695928: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x01 val:0x201e
     kworker/0:1-14    [000] ....   213.696049: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1941
     kworker/0:1-14    [000] ....   213.696169: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x01 val:0x203e
     kworker/0:1-14    [000] ....   213.696290: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9541
     kworker/0:1-14    [000] ....   213.696414: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1541
     kworker/0:2-106   [000] ....   214.651403: mdio_access: 2188000.ethernet-1 read  phy:0x01 reg:0x01 val:0x786d
     kworker/0:2-106   [000] ....   214.651531: mdio_access: 2188000.ethernet-1 read  phy:0x01 reg:0x05 val:0x0080
     kworker/0:2-106   [000] ....   214.651712: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1541
     kworker/0:2-106   [000] ....   214.651815: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9921
     kworker/0:2-106   [000] ....   214.651915: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1921
     kworker/0:2-106   [000] ....   214.652014: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x01 val:0x203e
     kworker/0:2-106   [000] ....   214.652692: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1921
     kworker/0:2-106   [000] ....   214.652840: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x01 val:0x201e
     kworker/0:2-106   [000] ....   214.652936: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9521
     kworker/0:2-106   [000] ....   214.653030: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1521
     kworker/0:2-106   [000] ....   214.653697: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1521
     kworker/0:2-106   [000] ....   214.653831: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9921
     kworker/0:2-106   [000] ....   214.653932: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1921
     kworker/0:2-106   [000] ....   214.654596: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x01 val:0x201e
     kworker/0:2-106   [000] ....   214.654736: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1921
     kworker/0:2-106   [000] ....   214.654836: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x01 val:0x201e
     kworker/0:2-106   [000] ....   214.655587: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9521
     kworker/0:2-106   [000] ....   214.655715: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1521
     kworker/0:2-106   [000] ....   214.655820: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1521
     kworker/0:2-106   [000] ....   214.656492: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9921
     kworker/0:2-106   [000] ....   214.656628: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1921
     kworker/0:2-106   [000] ....   214.656723: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x01 val:0x201e
     kworker/0:2-106   [000] ....   214.657325: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1921
     kworker/0:2-106   [000] ....   214.657462: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x01 val:0x201e
     kworker/0:2-106   [000] ....   214.657559: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9521
     kworker/0:2-106   [000] ....   214.657711: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1521
     kworker/0:2-106   [000] ....   214.658284: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1521
     kworker/0:2-106   [000] ....   214.658425: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9921
     kworker/0:2-106   [000] ....   214.658520: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1921
     kworker/0:2-106   [000] ....   214.658682: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x01 val:0x201e
     kworker/0:2-106   [000] ....   214.658915: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1921
     kworker/0:2-106   [000] ....   214.659011: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x01 val:0x203e
     kworker/0:2-106   [000] ....   214.659662: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9521
     kworker/0:2-106   [000] ....   214.659802: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1521
     kworker/0:1-14    [000] ....   214.732556: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1521
     kworker/0:1-14    [000] ....   214.732681: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9941
     kworker/0:1-14    [000] ....   214.732785: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1941
     kworker/0:1-14    [000] ....   214.732882: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x01 val:0x203e
     kworker/0:1-14    [000] ....   214.732994: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1941
     kworker/0:1-14    [000] ....   214.733089: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x01 val:0x201e
     kworker/0:1-14    [000] ....   214.733700: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9541
     kworker/0:1-14    [000] ....   214.733841: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1541
     kworker/0:1-14    [000] ....   214.733945: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1541
     kworker/0:1-14    [000] ....   214.734539: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9941
     kworker/0:1-14    [000] ....   214.734675: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1941
     kworker/0:1-14    [000] ....   214.734842: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x01 val:0x201e
     kworker/0:1-14    [000] ....   214.734944: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1941
     kworker/0:1-14    [000] ....   214.735080: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x01 val:0x201e
     kworker/0:1-14    [000] ....   214.735211: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9541
     kworker/0:1-14    [000] ....   214.735341: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1541
     kworker/0:1-14    [000] ....   214.735479: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1541
     kworker/0:1-14    [000] ....   214.735613: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9941
     kworker/0:1-14    [000] ....   214.735742: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1941
     kworker/0:1-14    [000] ....   214.735871: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x01 val:0x201e
     kworker/0:1-14    [000] ....   214.735999: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1941
     kworker/0:1-14    [000] ....   214.736123: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x01 val:0x201e
     kworker/0:1-14    [000] ....   214.736245: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9541
     kworker/0:1-14    [000] ....   214.736363: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1541
     kworker/0:1-14    [000] ....   214.736488: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1541
     kworker/0:1-14    [000] ....   214.736611: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9941
     kworker/0:1-14    [000] ....   214.736733: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1941
     kworker/0:1-14    [000] ....   214.736859: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x01 val:0x201e
     kworker/0:1-14    [000] ....   214.736953: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1941
     kworker/0:1-14    [000] ....   214.737074: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x01 val:0x203e
     kworker/0:1-14    [000] ....   214.737194: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9541
     kworker/0:1-14    [000] ....   214.737313: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1541
             mii-389   [000] ....   214.750875: mdio_access: 2188000.ethernet-1 write phy:0x22 reg:0x00 val:0x9b60
             mii-390   [000] ....   214.759035: mdio_access: 2188000.ethernet-1 read  phy:0x22 reg:0x01 val:0xc801
             mii-391   [000] ....   215.302713: mdio_access: 2188000.ethernet-1 write phy:0x22 reg:0x00 val:0x9b60
             mii-392   [000] ....   215.315237: mdio_access: 2188000.ethernet-1 read  phy:0x22 reg:0x01 val:0xc801
     kworker/0:2-106   [000] ....   215.691372: mdio_access: 2188000.ethernet-1 read  phy:0x01 reg:0x01 val:0x786d
     kworker/0:2-106   [000] ....   215.691498: mdio_access: 2188000.ethernet-1 read  phy:0x01 reg:0x05 val:0x0080
     kworker/0:2-106   [000] ....   215.691688: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1b60
     kworker/0:2-106   [000] ....   215.691794: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9921
     kworker/0:2-106   [000] ....   215.691894: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1921
     kworker/0:2-106   [000] ....   215.692061: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x01 val:0x203e
     kworker/0:2-106   [000] ....   215.692174: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1921
     kworker/0:2-106   [000] ....   215.692270: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x01 val:0x201e
     kworker/0:2-106   [000] ....   215.692370: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9521
     kworker/0:2-106   [000] ....   215.692465: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1521
     kworker/0:2-106   [000] ....   215.692566: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1521
     kworker/0:2-106   [000] ....   215.692658: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9921
     kworker/0:2-106   [000] ....   215.693346: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1921
     kworker/0:2-106   [000] ....   215.693481: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x01 val:0x201e
     kworker/0:2-106   [000] ....   215.693575: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1921
     kworker/0:2-106   [000] ....   215.694168: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x01 val:0x201e
     kworker/0:2-106   [000] ....   215.694319: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9521
     kworker/0:2-106   [000] ....   215.694422: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1521
     kworker/0:2-106   [000] ....   215.695026: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1521
     kworker/0:2-106   [000] ....   215.695158: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9921
     kworker/0:2-106   [000] ....   215.695253: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1921
     kworker/0:2-106   [000] ....   215.695344: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x01 val:0x201e
     kworker/0:2-106   [000] ....   215.695940: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1921
     kworker/0:2-106   [000] ....   215.696074: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x01 val:0x201e
     kworker/0:2-106   [000] ....   215.696172: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9521
     kworker/0:2-106   [000] ....   215.696775: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1521
     kworker/0:2-106   [000] ....   215.696920: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1521
     kworker/0:2-106   [000] ....   215.697017: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9921
     kworker/0:2-106   [000] ....   215.697617: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1921
     kworker/0:2-106   [000] ....   215.697752: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x01 val:0x201e
     kworker/0:2-106   [000] ....   215.697849: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1921
     kworker/0:2-106   [000] ....   215.697943: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x01 val:0x203e
     kworker/0:2-106   [000] ....   215.698180: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9521
     kworker/0:2-106   [000] ....   215.698865: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1521
     kworker/0:1-14    [000] ....   215.772572: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1521
     kworker/0:1-14    [000] ....   215.772693: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9941
     kworker/0:1-14    [000] ....   215.772790: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1941
     kworker/0:1-14    [000] ....   215.772891: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x01 val:0x203e
     kworker/0:1-14    [000] ....   215.772985: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1941
     kworker/0:1-14    [000] ....   215.773078: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x01 val:0x201e
     kworker/0:1-14    [000] ....   215.773684: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9541
     kworker/0:1-14    [000] ....   215.773818: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1541
     kworker/0:1-14    [000] ....   215.773931: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1541
     kworker/0:1-14    [000] ....   215.774524: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9941
     kworker/0:1-14    [000] ....   215.774661: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1941
     kworker/0:1-14    [000] ....   215.774752: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x01 val:0x201e
     kworker/0:1-14    [000] ....   215.775351: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1941
     kworker/0:1-14    [000] ....   215.775483: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x01 val:0x201e
     kworker/0:1-14    [000] ....   215.775578: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9541
     kworker/0:1-14    [000] ....   215.776174: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1541
     kworker/0:1-14    [000] ....   215.776318: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1541
     kworker/0:1-14    [000] ....   215.776417: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9941
     kworker/0:1-14    [000] ....   215.776567: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1941
     kworker/0:1-14    [000] ....   215.776704: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x01 val:0x201e
     kworker/0:1-14    [000] ....   215.776831: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1941
     kworker/0:1-14    [000] ....   215.776971: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x01 val:0x201e
     kworker/0:1-14    [000] ....   215.777070: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9541
     kworker/0:1-14    [000] ....   215.777199: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1541
     kworker/0:1-14    [000] ....   215.777335: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1541
     kworker/0:1-14    [000] ....   215.777469: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9941
     kworker/0:1-14    [000] ....   215.777589: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1941
     kworker/0:1-14    [000] ....   215.777707: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x01 val:0x201e
     kworker/0:1-14    [000] ....   215.777888: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1941
     kworker/0:1-14    [000] ....   215.780209: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x01 val:0x203e
     kworker/0:1-14    [000] ....   215.780334: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9541
     kworker/0:1-14    [000] ....   215.780433: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1541
             mii-393   [000] ....   215.855952: mdio_access: 2188000.ethernet-1 write phy:0x22 reg:0x00 val:0x9b60
             mii-394   [000] ....   215.867854: mdio_access: 2188000.ethernet-1 read  phy:0x22 reg:0x01 val:0xc801
     kworker/0:2-106   [000] ....   216.731386: mdio_access: 2188000.ethernet-1 read  phy:0x01 reg:0x01 val:0x786d
     kworker/0:2-106   [000] ....   216.731518: mdio_access: 2188000.ethernet-1 read  phy:0x01 reg:0x05 val:0x0080
     kworker/0:2-106   [000] ....   216.731706: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1b60
     kworker/0:2-106   [000] ....   216.731808: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9921
     kworker/0:2-106   [000] ....   216.731907: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1921
     kworker/0:2-106   [000] ....   216.731999: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x01 val:0x203e
     kworker/0:2-106   [000] ....   216.732681: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1921
     kworker/0:2-106   [000] ....   216.732829: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x01 val:0x201e
     kworker/0:2-106   [000] ....   216.732929: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9521
     kworker/0:2-106   [000] ....   216.733598: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1521
     kworker/0:2-106   [000] ....   216.733739: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1521
     kworker/0:2-106   [000] ....   216.733835: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9921
     kworker/0:2-106   [000] ....   216.734495: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1921
     kworker/0:2-106   [000] ....   216.734633: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x01 val:0x201e
     kworker/0:2-106   [000] ....   216.734737: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1921
     kworker/0:2-106   [000] ....   216.735400: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x01 val:0x201e
     kworker/0:2-106   [000] ....   216.735544: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9521
     kworker/0:2-106   [000] ....   216.735645: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1521
     kworker/0:2-106   [000] ....   216.736310: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1521
     kworker/0:2-106   [000] ....   216.736443: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9921
     kworker/0:2-106   [000] ....   216.736539: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1921
     kworker/0:2-106   [000] ....   216.736633: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x01 val:0x201e
     kworker/0:2-106   [000] ....   216.737223: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1921
     kworker/0:2-106   [000] ....   216.737355: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x01 val:0x201e
     kworker/0:2-106   [000] ....   216.737448: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9521
     kworker/0:2-106   [000] ....   216.737610: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1521
     kworker/0:2-106   [000] ....   216.737712: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1521
     kworker/0:2-106   [000] ....   216.738280: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9921
     kworker/0:2-106   [000] ....   216.738415: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1921
     kworker/0:2-106   [000] ....   216.738508: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x01 val:0x201e
     kworker/0:2-106   [000] ....   216.738679: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1921
     kworker/0:2-106   [000] ....   216.738867: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x01 val:0x203e
     kworker/0:2-106   [000] ....   216.738965: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9521
     kworker/0:2-106   [000] ....   216.739532: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1521
     kworker/0:1-14    [000] ....   216.812558: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1521
     kworker/0:1-14    [000] ....   216.812673: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9941
     kworker/0:1-14    [000] ....   216.812778: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1941
     kworker/0:1-14    [000] ....   216.812874: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x01 val:0x203e
     kworker/0:1-14    [000] ....   216.812968: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1941
     kworker/0:1-14    [000] ....   216.813583: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x01 val:0x201e
     kworker/0:1-14    [000] ....   216.813732: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9541
     kworker/0:1-14    [000] ....   216.813835: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1541
     kworker/0:1-14    [000] ....   216.814444: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1541
     kworker/0:1-14    [000] ....   216.814574: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9941
     kworker/0:1-14    [000] ....   216.814685: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1941
     kworker/0:1-14    [000] ....   216.815288: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x01 val:0x201e
     kworker/0:1-14    [000] ....   216.815424: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1941
     kworker/0:1-14    [000] ....   216.815526: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x01 val:0x201e
     kworker/0:1-14    [000] ....   216.816115: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9541
     kworker/0:1-14    [000] ....   216.816258: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1541
     kworker/0:1-14    [000] ....   216.816365: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1541
     kworker/0:1-14    [000] ....   216.816958: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9941
     kworker/0:1-14    [000] ....   216.817089: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1941
     kworker/0:1-14    [000] ....   216.817184: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x01 val:0x201e
     kworker/0:1-14    [000] ....   216.817282: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1941
     kworker/0:1-14    [000] ....   216.817437: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x01 val:0x201e
     kworker/0:1-14    [000] ....   216.817569: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9541
     kworker/0:1-14    [000] ....   216.817694: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1541
     kworker/0:1-14    [000] ....   216.817977: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1541
     kworker/0:1-14    [000] ....   216.820294: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9941
     kworker/0:1-14    [000] ....   216.820419: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1941
     kworker/0:1-14    [000] ....   216.820565: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x01 val:0x201e
     kworker/0:1-14    [000] ....   216.820670: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1941
     kworker/0:1-14    [000] ....   216.820761: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x01 val:0x203e
     kworker/0:1-14    [000] ....   216.820867: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9541
     kworker/0:1-14    [000] ....   216.821018: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1541
     kworker/0:1-14    [000] ....   217.771340: mdio_access: 2188000.ethernet-1 read  phy:0x01 reg:0x01 val:0x786d
     kworker/0:1-14    [000] ....   217.771464: mdio_access: 2188000.ethernet-1 read  phy:0x01 reg:0x05 val:0x0080
     kworker/0:1-14    [000] ....   217.771642: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1541
     kworker/0:1-14    [000] ....   217.771744: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9921
     kworker/0:1-14    [000] ....   217.771850: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1921
     kworker/0:1-14    [000] ....   217.771959: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x01 val:0x203e
     kworker/0:1-14    [000] ....   217.772051: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1921
     kworker/0:1-14    [000] ....   217.772149: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x01 val:0x201e
     kworker/0:1-14    [000] ....   217.772247: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9521
     kworker/0:1-14    [000] ....   217.772337: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1521
     kworker/0:1-14    [000] ....   217.772451: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1521
     kworker/0:1-14    [000] ....   217.772546: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9921
     kworker/0:1-14    [000] ....   217.772649: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1921
     kworker/0:1-14    [000] ....   217.772749: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x01 val:0x201e
     kworker/0:1-14    [000] ....   217.772857: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1921
     kworker/0:1-14    [000] ....   217.772958: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x01 val:0x201e
     kworker/0:1-14    [000] ....   217.773048: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9521
     kworker/0:1-14    [000] ....   217.773135: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1521
     kworker/0:1-14    [000] ....   217.773235: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1521
     kworker/0:1-14    [000] ....   217.773925: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9921
     kworker/0:1-14    [000] ....   217.774074: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1921
     kworker/0:1-14    [000] ....   217.774171: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x01 val:0x201e
     kworker/0:1-14    [000] ....   217.774845: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1921
     kworker/0:1-14    [000] ....   217.774981: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x01 val:0x201e
     kworker/0:1-14    [000] ....   217.775080: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9521
     kworker/0:1-14    [000] ....   217.775739: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1521
     kworker/0:1-14    [000] ....   217.775901: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1521
     kworker/0:1-14    [000] ....   217.776010: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9921
     kworker/0:1-14    [000] ....   217.776669: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1921
     kworker/0:1-14    [000] ....   217.776814: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x01 val:0x201e
     kworker/0:1-14    [000] ....   217.776918: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1921
     kworker/0:1-14    [000] ....   217.777513: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x01 val:0x203e
     kworker/0:1-14    [000] ....   217.777651: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9521
     kworker/0:1-14    [000] ....   217.778251: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1521
     kworker/0:2-106   [000] ....   217.852560: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1521
     kworker/0:2-106   [000] ....   217.852675: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9941
     kworker/0:2-106   [000] ....   217.852775: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1941
     kworker/0:2-106   [000] ....   217.852869: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x01 val:0x203e
     kworker/0:2-106   [000] ....   217.852964: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1941
     kworker/0:2-106   [000] ....   217.853577: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x01 val:0x201e
     kworker/0:2-106   [000] ....   217.853724: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9541
     kworker/0:2-106   [000] ....   217.853823: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1541
     kworker/0:2-106   [000] ....   217.854427: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1541
     kworker/0:2-106   [000] ....   217.854565: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9941
     kworker/0:2-106   [000] ....   217.854665: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1941
     kworker/0:2-106   [000] ....   217.855252: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x01 val:0x201e
     kworker/0:2-106   [000] ....   217.855394: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1941
     kworker/0:2-106   [000] ....   217.855494: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x01 val:0x201e
     kworker/0:2-106   [000] ....   217.856084: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9541
     kworker/0:2-106   [000] ....   217.856218: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1541
     kworker/0:2-106   [000] ....   217.856318: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1541
     kworker/0:2-106   [000] ....   217.856480: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9941
     kworker/0:2-106   [000] ....   217.856585: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1941
     kworker/0:2-106   [000] ....   217.856717: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x01 val:0x201e
     kworker/0:2-106   [000] ....   217.856852: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1941
     kworker/0:2-106   [000] ....   217.856943: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x01 val:0x201e
     kworker/0:2-106   [000] ....   217.857070: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9541
     kworker/0:2-106   [000] ....   217.857196: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1541
     kworker/0:2-106   [000] ....   217.857325: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1541
     kworker/0:2-106   [000] ....   217.857449: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9941
     kworker/0:2-106   [000] ....   217.857573: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1941
     kworker/0:2-106   [000] ....   217.857693: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x01 val:0x201e
     kworker/0:2-106   [000] ....   217.857874: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1941
     kworker/0:2-106   [000] ....   217.860193: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x01 val:0x203e
     kworker/0:2-106   [000] ....   217.860306: mdio_access: 2188000.ethernet-1 write phy:0x02 reg:0x00 val:0x9541
     kworker/0:2-106   [000] ....   217.860451: mdio_access: 2188000.ethernet-1 read  phy:0x02 reg:0x00 val:0x1541


Cheers,
Benjamin


^ permalink raw reply	[flat|nested] 13+ messages in thread
* Re: i.mx6ul with DSA in multi chip addressing mode - no MDIO access
  2019-07-08 13:55               ` Benjamin Beckmeyer
@ 2019-07-08 14:57                 ` Andrew Lunn
  2019-07-09 13:20                   ` Benjamin Beckmeyer
  0 siblings, 1 reply; 13+ messages in thread
From: Andrew Lunn @ 2019-07-08 14:57 UTC (permalink / raw)
  To: Benjamin Beckmeyer; +Cc: netdev

> Hi Andrew,
> I got it working a little bit better. When I'm fast enough I can read
> the registers I want but it isn't a solution.

Why do you need to read registers?

What you actually might be interested in is the debugfs patches in
Viviens github tree.

> Here is an output of the tracing even with my custom accesses.
> mii -i 2 0 0x9b60; mii -i 2 1
> phyid:2, reg:0x01 -> 0xc801
> 
> Do you know how to delete EEInt bit? It is always one. And now all 
> accesses coming from the kworker thread. Maybe this is your polling 
> function?

EEInt should clear on read for older chips. For 6390, it might be
necessary to read global 2, register 0x13, index 03.
 
> I view the INT pin on an oscilloscope but it never changed. So maybe
> this is the problem. We just soldered a pull-up to that pin but it 
> still never changend. Maybe you have an idea?

The EEInt bit is probably masked. So it will not generate in
interrupt.

> So what I think is, because of the EEInt bit is never set back to one 
> i will poll it as fast as possible.

Is it forever looping in mv88e6xxx_g1_irq_thread_work? Or is it the
polling code, mv88e6xxx_irq_poll() firing every 100ms?

	Andrew

^ permalink raw reply	[flat|nested] 13+ messages in thread
* Re: i.mx6ul with DSA in multi chip addressing mode - no MDIO access
  2019-07-08 14:57                 ` Andrew Lunn
@ 2019-07-09 13:20                   ` Benjamin Beckmeyer
  2019-07-09 13:52                     ` Andrew Lunn
  0 siblings, 1 reply; 13+ messages in thread
From: Benjamin Beckmeyer @ 2019-07-09 13:20 UTC (permalink / raw)
  To: Andrew Lunn; +Cc: netdev

>> Hi Andrew,
>> I got it working a little bit better. When I'm fast enough I can read
>> the registers I want but it isn't a solution.
> Why do you need to read registers?
>
> What you actually might be interested in is the debugfs patches in
> Viviens github tree.
>
>> Here is an output of the tracing even with my custom accesses.
>> mii -i 2 0 0x9b60; mii -i 2 1
>> phyid:2, reg:0x01 -> 0xc801
>>
>> Do you know how to delete EEInt bit? It is always one. And now all 
>> accesses coming from the kworker thread. Maybe this is your polling 
>> function?
> EEInt should clear on read for older chips. For 6390, it might be
> necessary to read global 2, register 0x13, index 03.
>  
>> I view the INT pin on an oscilloscope but it never changed. So maybe
>> this is the problem. We just soldered a pull-up to that pin but it 
>> still never changend. Maybe you have an idea?
> The EEInt bit is probably masked. So it will not generate in
> interrupt.
>
>> So what I think is, because of the EEInt bit is never set back to one 
>> i will poll it as fast as possible.
> Is it forever looping in mv88e6xxx_g1_irq_thread_work? Or is it the
> polling code, mv88e6xxx_irq_poll() firing every 100ms?
>
> 	Andrew

Hi Andrew,
good news first, it seems to be running ;-).

The interrupt GPIO pin was not correctly configured in the device tree.

For now we have around 68 accesses per second, I think this is okay 
because we even have indirect access, so the bus must be more busy.

What do you think about it?

Why we need access to the bus is because we have some software which was 
using the DSDT driver and now we want to switch to the UMSD driver.
But we hope that we can forget about all the UMSD driver stuff and the 
DSDT driver stuff as well and just use the DSA part from the kernel.
To be honest, so far I don't know what functions we need from the driver
which aren't supported by the DSA.

Thanks again for your help and patience.

Cheers,
Benny


^ permalink raw reply	[flat|nested] 13+ messages in thread
* Re: i.mx6ul with DSA in multi chip addressing mode - no MDIO access
  2019-07-09 13:20                   ` Benjamin Beckmeyer
@ 2019-07-09 13:52                     ` Andrew Lunn
  0 siblings, 0 replies; 13+ messages in thread
From: Andrew Lunn @ 2019-07-09 13:52 UTC (permalink / raw)
  To: Benjamin Beckmeyer; +Cc: netdev

> Hi Andrew,
> good news first, it seems to be running ;-).

Great.

> 
> The interrupt GPIO pin was not correctly configured in the device tree.
> 
> For now we have around 68 accesses per second, I think this is okay 
> because we even have indirect access, so the bus must be more busy.

That sounds reasonable.

> Why we need access to the bus is because we have some software which was 
> using the DSDT driver and now we want to switch to the UMSD driver.
> But we hope that we can forget about all the UMSD driver stuff and the 
> DSDT driver stuff as well and just use the DSA part from the kernel.
> To be honest, so far I don't know what functions we need from the driver
> which aren't supported by the DSA.

You should take a close look at what you actually need. Using
DSDT/UMSD at the same time as mainline DSA does not sound like a good
idea. One can stomp over the other.

If you do decide to do this, you are going to need to add a new API to
allow DSDT/UMSD to get reliable access to the registers. You need to
take the chip->reg_lock to give you exclusive access to the
indirection registers. That also won't be accepted into mainline. We
don't want user space drivers...

      Andrew

^ permalink raw reply	[flat|nested] 13+ messages in thread
end of thread, other threads:[~2019-07-09 13:53 UTC | newest]

Thread overview: 13+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2019-07-03 13:10 i.mx6ul with DSA in multi chip addressing mode - no MDIO access Benjamin Beckmeyer
2019-07-03 15:55 ` Andrew Lunn
2019-07-04  4:33   ` Benjamin Beckmeyer
2019-07-04  8:54   ` Benjamin Beckmeyer
2019-07-04 13:27     ` Andrew Lunn
2019-07-04 14:39       ` Benjamin Beckmeyer
2019-07-04 15:53         ` Andrew Lunn
2019-07-05 12:41           ` Benjamin Beckmeyer
2019-07-05 14:36             ` Andrew Lunn
2019-07-08 13:55               ` Benjamin Beckmeyer
2019-07-08 14:57                 ` Andrew Lunn
2019-07-09 13:20                   ` Benjamin Beckmeyer
2019-07-09 13:52                     ` Andrew Lunn

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