netdev - Re: [PATCH net-next 1/4] mlx5: Make building eswitch configurable

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Message-ID: <CALzJLG_v2HxsdPdX5H=T51RGmaMMnXVxzihuPN66a9RxDadEcw@mail.gmail.com>
Date:   Fri, 27 Jan 2017 19:38:56 +0200
From:   Saeed Mahameed <saeedm@....mellanox.co.il>
To:     Or Gerlitz <gerlitz.or@...il.com>
Cc:     Tom Herbert <tom@...bertland.com>,
        Saeed Mahameed <saeedm@...lanox.com>,
        David Miller <davem@...emloft.net>,
        Linux Netdev List <netdev@...r.kernel.org>,
        Kernel Team <kernel-team@...com>
Subject: Re: [PATCH net-next 1/4] mlx5: Make building eswitch configurable

On Fri, Jan 27, 2017 at 7:34 AM, Or Gerlitz <gerlitz.or@...il.com> wrote:
> On Fri, Jan 27, 2017 at 1:32 AM, Tom Herbert <tom@...bertland.com> wrote:
>> Add a configuration option (CONFIG_MLX5_CORE_ESWITCH) for controlling
>> whether the eswitch code is built. Change Kconfig and Makefile
>> accordingly.
>
> Tom, FWIW, please note that the basic e-switch functionality is needed
> also when SRIOV isn't of use, this is for a multi host configuration.
>

Right, set_l2_table_entry@...itch.c need to be called by PF for any UC
MAC address wanted by VF or PF.
To keep one flow in the code, the implementation is done as part of eswitch.

so in multi-host configuration (where there are 4 PFs) each PF should
invoke set_l2_table_entry_cmd  for each one of its own UC MACs.

populating the l2 table is done using the whole eswitch event driven
mechanisms, it is not easy and IMH not right to separate eswitch
tables from l2 table (same management logic, different tables).

Anyways as Or stated this is just an FYI, eswitch needs to be enabled
on Multi-host configuration.

> Or.
>
> My WW (and same for the rest of the IL team..) has ended so I will be
> able to further look on this series and comment on Sunday.