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.moy...@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-boun...@rtems.org> *Im Auftrag von *Daniel Hellstrom > *Gesendet:* Montag, 20. Februar 2023 15:59 > *An:* Viraj Jagadale <virajjagadale...@gmail.com>; devel@rtems.org > *Cc:* kinsey.mo...@rtems.org; and...@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. > >
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