Hi Andy,
On Wed, 17 Nov 2021 at 01:50, Andy Shevchenko <andy.shevchenko at gmail.com> wrote:
>
> On Wed, Nov 10, 2021 at 9:47 PM Andy Shevchenko
> <andy.shevchenko at gmail.com> wrote:
> >
> > Hi!
> >
> > What is the Best Known Method to enable NetConsole over USB ethernet
> > gadget on DWC3?
>
> Any insight anyone? v2022.01-rc2 behaves the same way.
> It was checked that in USB host mode and external card the netconsole
> setup works.
I haven't tried it, but it would be nice it it worked!
- Simon
>
> > Currently I have a "blinking" type of network interface (from the host
> > side) and it's too hard to understand all the mysterious ways of this
> > setup.
> >
> > I have set std* to "nc,serial" (*) to be able to have the network
> > console be set up and running.
> >
> > *) "serial" is just for the initial boot strap, this is a product
> > ready Android tablet that users are not supposed to solder wires on
> > its PCB. No need to say that I have another similar device
> > (https://lore.kernel.org/u-boot/CAHp75VdPTU-THtHi3eRiD7rd_tC90fC66AiUvzMnoF2Ky0J_HQ@mail.gmail.com/T/#u)
> > that has no serial interface at all, and I can't do anything about it
> > due to lack of support from U-Boot.
> >
> > Unfortunately it goes this direction (in net_loop() call)
> > net_init();
> > if (eth_is_on_demand_init()) {
> > eth_halt();
> > eth_set_current();
> > ret = eth_init();
> > if (ret < 0) {
> > eth_halt();
> > return ret;
> > }
> >
> > The problem here is that the gadget timeouts for some reason and of
> > course for the default 3 seconds I may not have enough time to set up
> > the network on the host side. Moreover, if by luck I manage to achieve
> > that, it still doesn't work.
> >
> > --- net_loop Entry
> > Trying usb_ether
> > 0
> > - 0 'dwc3'
> > - found
> > using dwc3-gadget, OUT ep2out IN ep2in STATUS ep3in
> > MAC de:ad:be:ef:00:01
> > HOST MAC de:ad:be:ef:00:00
> > ...
> > dwc3-generic-peripheral dwc3: Transfer Not Ready while ep0out in state
> > 'Data Phase'dwc3-generic-peripheral dwc3:
> > Transfer Complete while ep0out in state 'Status Phase'The remote end
> > did not respond in time.eth_reset_config
> > dwc3-generic-peripheral dwc3: request 36561380 from ep3in completed
> > 0/8 ===> -108
> > event 00 --> -108
> > eth_unbind...
> > FAIL
> >
> > ...and repeat...
> >
> > Conclusion it is not working at all.
> >
> > Expectations:
> > the USB gadget leaves UDC in state that the host would be able to set
> > up the link and the netconsole would be able to send data to it.
> >
> > How to achieve that?
> >
> > Alternative: serial function of the composite device. As of today not
> > an option — it simply does not exist in the U-Boot. Anybody is working
> > on that?
> >
> > --
> > With Best Regards,
> > Andy Shevchenko
>
>
>
> --
> With Best Regards,
> Andy Shevchenko