Project Discussion for GSoC 2023

[Viraj Jagadale]

Hi Daniel and Gabriel,

Thank you for responding. I don't own an ARTY A7-100T board. As suggested,
I will study the GRETH_GBIT manual at the same time. Can I refer to the
DP83848 or LAN8742A documentation for stm32, both of which support legacy
stack and lwip? If not, could you please recommend a device?

Please share the driver for rtems-libbsd with me as it will be very useful
as a starting point.

Regards,
Viraj.

On Tue, Feb 21, 2023 at 2:00 PM <Gabriel.Moyano at dlr.de> wrote:

> Hi Viraj,
>
>
>
> We ported the driver for greth to rtems-libbsd in the past but never got
> to submit it (it might need some further refinement). The driver depends
> on the driver manager (drvmgr). Not sure if this is the best approach but
> it is a good starting point and we’d be happy to share it.
>
>
>
> Best regards,
>
> Gabriel
>
>
>
>
>
> *Von:* devel <devel-bounces at rtems.org> *Im Auftrag von *Daniel Hellstrom
> *Gesendet:* Montag, 20. Februar 2023 15:59
> *An:* Viraj Jagadale <virajjagadale123 at gmail.com>; devel at rtems.org
> *Cc:* kinsey.moore at rtems.org; andrei at chichak.ca
> *Betreff:* Re: Project Discussion for GSoC 2023
>
>
>
> Hi Viraj,
>
> There is an old GRETH network driver as part of the old network stack that
> would be a good reference.
>
> Note that the old driver supports two IPs (GRETH 10/100, and GRETH_GBIT
> 10/100/1000). The GRETH_GBIT IP is mostly backwards compatible with the
> GRETH, but as some additional functionality to off load the CPU with
> UDP/TCP check-summing, unaligned DMA, and scatter-gather DMA for example.
> One approach could be to begin to focus on the more capable GRETH_GBIT IP
> first, section 14:
>
>     https://www.gaisler.com/doc/gr740/GR740-UM-DS-2-5.pdf
>
>     or from the IP manual, section XX:
>
>     https://www.gaisler.com/products/grlib/grip.pdf
>
> Please keep in mind that the GRETH driver will be used by both SPARC/LEON3
> BSP and RISC-V/NOEL-V BSP in the future.
>
> It sounds as a good approach to look at the interface of the LWIP stack
> towards the Network Device Driver, for example the DEC driver to learn
> however the best would be if there is a MAC device supported both by legacy
> stack and the LWIP? Simultaneously you could study the GRETH_GBIT manual
> with register and DMA interface and the old device driver source code?
>
> If you have a ARTY A7-100T board you could use the RISC-V design to get
> access to the GRETH IP easily get started with. The GRMON eval version
> would also work together with it for a hardware-debugger (no additional
> cost required) which you can connect GDB for source debugging if you wish:
>
>     https://www.gaisler.com/index.php/products/processors/noel-v-examples
>
>     https://www.gaisler.com/index.php/products/debug-tools/grmon3
>
> Kind Regards,
> Daniel
>
>
>
>
>
>
>
> On 2023-02-13 04:25, Viraj Jagadale wrote:
>
> Dear Community,
>
> I am interested in contributing to RTEMS and will be participating in GSoC
> 2023. I am interested in projects #4595
> <https://devel.rtems.org/ticket/4595> and #4596
> <https://devel.rtems.org/ticket/4596> because I am passionate about
> networking. I'm currently concentrating solely on #4595. I'm aware that
> I'll need to study and comprehend the lwip stack documentation, as well as
> how the Ethernet protocol is implemented and networking services are
> provided for applications. Then I'll have to devise a strategy for
> designing the driver architecture. I'm thinking about reading the RTEMS
> Legacy Networking User Manual and understanding the DEC 21140 example to
> get started. I'm not sure if this is the right approach, and I'll need your
> advice. I am also willing to help with existing bugs and documentation
> updates.
>
>
>
> Regards,
>
> Viraj Jagadale.
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.rtems.org/pipermail/devel/attachments/20230221/dec0aff4/attachment-0001.htm>