netdev - Re: [PATCH net-next 1/2] devlink: Add support to set port function as trusted

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Date:   Wed, 19 Jan 2022 22:03:38 -0800
From:   Saeed Mahameed <saeedm@...dia.com>
To:     Parav Pandit <parav@...dia.com>
Cc:     Jakub Kicinski <kuba@...nel.org>,
        Saeed Mahameed <saeed@...nel.org>,
        Sunil Sudhakar Rani <sunrani@...dia.com>,
        Jiri Pirko <jiri@...dia.com>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "davem@...emloft.net" <davem@...emloft.net>,
        Bodong Wang <bodong@...dia.com>
Subject: Re: [PATCH net-next 1/2] devlink: Add support to set port function
 as trusted

On 20 Jan 04:52, Parav Pandit wrote:
>
>> From: Saeed Mahameed <saeedm@...dia.com>
>> Sent: Thursday, January 20, 2022 6:11 AM
>
>[..]
>> >
>> >I do agree you and Saeed that instead of port function param, port function
>> resource is more suitable here even though its bool.
>> >
>>
>> I believe flexibility can be achieved with some FW message? Parav can you
>> investigate ? To be clear here the knob must be specific to sw_steering
>> exposed as memory resource.
>>
>Sure.
>I currently think of user interface something like below,
>I will get back with more plumbing of netlink and enum/string.
>
># to enable
>devlink port function resource set pci/0000:03:00.0/port_index device_memory/sw_steering 1
>

this looks like an abuse of the interface, I literally meant to control the
amount of ICM pages dedicated for SW steering per function, this requires
some FW support, but i think this is the correct direction.

># to disable
>devlink port function resource set pci/0000:03:00.0/port_index device_memory/sw_steering 0 (current default)
>
>Thanks Jakub, Saeed for the inputs and direction.