On Wed, Nov 10, 2021 at 9:47 PM Andy Shevchenko <andy.shevche...@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. > 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...@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
