[PATCH v2 00/14] Introduce the lwIP network stack

[Tom Rini]

On Fri, May 24, 2024 at 06:19:54PM +0200, Jerome Forissier wrote:

> This is a rework of a patch series by Maxim Uvarov: "net/lwip: add lwip
> library for the network stack" [1]. The goal is to introduce the lwIP TCP/IP
> stack [2] [3] as an alternative to the current implementation in net/,
> selectable with Kconfig, and ultimately keep only lwIP if possible. Some
> reasons for doing so are:
> - Make the support of HTTPS in the wget command easier. Javier T. (CC'd)
> has some additional lwIP and Mbed TLS patches to do so. With that it
> becomes possible to fetch and launch a distro installer such as Debian
> etc. directly from the U-Boot shell.
> - Possibly benefit from additional features implemented in lwIP
> - Less code to maintain in U-Boot
> 
> The first patch introduces a new Kconfig symbol: NET_LWIP, which selects
> the lwIP implementation instead of the current one (NET). Contrary to the
> approach chosen by Maxim in [1], NET_LWIP and NET cannot be enabled
> simultaneously. The rationale is we want to start from a clean state and
> not pull potentially duplicated functionality from both stacks. Note
> however that a few files are still built in net/, they are the ones
> related to ethernet device management and the ethernet bootflow.
> 
> The second patch imports the lwIP code as a Git subtree under
> lib/lwip/lwip. Some glue code is added under lib/lwip/u-boot.

For next time, please just make it a pre-req to run the git subtree
command (and note it in the cover letter).

In more specific feedback, I tried this on a Pi 3, and:
U-Boot> tftpboot 200000 EFI/arm64/helloworld.efi
TFTP from server 192.168.1.10; our IP address is 192.168.1.100
Filename 'EFI/arm64/helloworld.efi'.
Load address: 0x200000
Loading:
....
FAILED test/py/tests/test_efi_loader.py::test_efi_helloworld_net - u_boot_spawn.Timeout

So some amount of networking is working (that's a reasonable dhcp
response it got), but tftp'ing a file fails.

-- 
Tom
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