[RFC PATCH v2 0/2] Add DSA MultiCPU port support

[Daniel Golle]

On Sun, Jan 23, 2022 at 01:35:24AM +0100, Ansuel Smith wrote:
> This adds the hack patches for DSA multicpu support.
> I still have to clean patch 1, 3, 4 but considering this is still a bit WIP
> I decided to clean and provide a correct patches for the final version.
> 
> This version won't change the logic by DSA that assing every port to the first
> cpu port. A init script is required to change the cpu port at runtime.

Imho we should also add patch

 From: LGA1150 <dqfext at gmail.com>
 Date: Mon, 17 May 2021 10:34:58 +0200
 Subject: [PATCH] net: dsa: add dts-property default_cpu

so this can be done in device-tree rather than using an init-script.

> This change was done for the only reason that a round-robin way can't be trusted
> and is too random. Some cpu port in some switch (brcm) for example doesn't
> behave the same way and randomly assigning the cpu port would cause
> problems/malfunctions.

I agree that round-robin is not such a good idea, the commit message of
the patch itself will also have to be updated to reflect that change.

> 
> v2:
> - Rework iproute logic to not pollute link
> - Rework the round-robin cpu port assign logic
> 
> Ansuel Smith (2):
>   linux: introduce multi-cpu dsa patch
>   iproute2: add support for cpu set
> 
>  ...101-iplink_allow_to_change_cpu_value.patch |  81 ++++++++++
>  ...net-dsa-allow_for_multiple_CPU_ports.patch | 151 ++++++++++++++++++
>  ...add_ndo_for_setting_the_cpu_property.patch | 113 +++++++++++++
>  ..._set_cpu_for_changing_ports_CPU_port.patch |  89 +++++++++++
>  ...clude-net-add-dsa_cpu_ports-function.patch |  34 ++++
>  5 files changed, 468 insertions(+)
>  create mode 100644 package/network/utils/iproute2/patches/101-iplink_allow_to_change_cpu_value.patch
>  create mode 100644 target/linux/generic/hack-5.10/780-1-net-dsa-allow_for_multiple_CPU_ports.patch
>  create mode 100644 target/linux/generic/hack-5.10/780-2-net-add_ndo_for_setting_the_cpu_property.patch
>  create mode 100644 target/linux/generic/hack-5.10/780-3-net-dsa-implement_ndo_set_cpu_for_changing_ports_CPU_port.patch
>  create mode 100644 target/linux/generic/hack-5.10/780-4-include-net-add-dsa_cpu_ports-function.patch
> 
> -- 
> 2.33.1
> 
> 
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