[U-Boot-Board-Maintainers] Raspberry pi 4 - u-boot - genet / scb

[Florian Fainelli]

On 12/12/19 3:59 AM, Matthias Brugger wrote:
> 
> 
> On 12/12/2019 11:41, Andre Przywara wrote:
>> On Wed, 11 Dec 2019 10:23:16 +0100
>> Matthias Brugger <matthias.bgg at gmail.com> wrote:
>>
>> Hi,
>>
>>> On 09/12/2019 14:33, Sascha Dewald wrote:
>>>> Hello Amit,
>>>>
>>>> no problem.
>>>>
>>>> Is there some git feature branch, to have a look ?  
>>>
>>> Yes I'd love to have a look as well :)
>>
>> We will send an RFC later this week, Amit is doing some cleanup now. At the moment transfers work up to 256 packets (375KB when using TFTP), at this point it breaks, because recycling DMA descriptors is not working for some reason. I haven't found any documentation for the MAC, so I am reverse engineering the Linux driver and doing printf and tcpdump debugging right now. Looking forward to people joining us in this effort ;-)
>>
> 
> Thanks for the update. I CC'ed Florian who I think is the SW expert on that
> chip. Maybe he can help you.

Transfers work for up to 256 packets in which direction? Are you
properly consuming descriptors that were produced by the RDMA (on
receive), conversely, polling the TDMA consumer index on transmit? Can
you share your code somewhere so I could see if there are obvious problems?
-- 
Florian