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

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Message-ID: <CALzJLG9YXBzXAOrtth7SX8n3S5cN3ZSmKax4FOGiTr7SY8gobg@mail.gmail.com>
Date:   Fri, 27 Jan 2017 20:05:07 +0200
From:   Saeed Mahameed <saeedm@....mellanox.co.il>
To:     Tom Herbert <tom@...bertland.com>
Cc:     Or Gerlitz <gerlitz.or@...il.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 7:50 PM, Tom Herbert <tom@...bertland.com> wrote:
> On Fri, Jan 27, 2017 at 9:38 AM, Saeed Mahameed
> <saeedm@....mellanox.co.il> wrote:
>> 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.
>>
> What indicate a multi-host configuration?

nothing in the driver, it is transparent.

>
>>> 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.