netdev - Re: [net-next 02/12] i40e: Implement DDP support in i40e driver

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Date:   Fri, 1 Mar 2019 11:19:54 -0800
From:   Jakub Kicinski <jakub.kicinski@...ronome.com>
To:     Jeff Kirsher <jeffrey.t.kirsher@...el.com>
Cc:     davem@...emloft.net,
        Aleksandr Loktionov <aleksandr.loktionov@...el.com>,
        netdev@...r.kernel.org, nhorman@...hat.com, sassmann@...hat.com,
        Andrew Bowers <andrewx.bowers@...el.com>
Subject: Re: [net-next 02/12] i40e: Implement DDP support in i40e driver

On Thu, 28 Feb 2019 21:03:42 -0800, Jeff Kirsher wrote:
> From: Aleksandr Loktionov <aleksandr.loktionov@...el.com>
> 
> This patch introduces DDP (Dynamic Device Personalization) which allows
> loading profiles that change the way internal parser interprets processed
> frames. To load DDP profiles it utilizes ethtool flash feature. The files
> with recipes must be located in /var/lib/firmware directory. Afterwards
> the recipe can be loaded by invoking:
> 
>     ethtool -f <if_name> <file_name> 100
>     ethtool -f <if_name> - 100
> 
> See further usage details of this feature in the i40e documentation, or
> visit
> https://software.intel.com/en-us/articles/dynamic-device-personalization-for-intel-ethernet-700-series

This link talks about DPDK only, is this useful for Linux networking?

> The driver shall verify DDP profile can be loaded in accordance with
> the rules:
> * Package with Group ID 0 are exclusive and can only be loaded the first.
> * Packages with Group ID 0x01-0xFE can only be loaded simultaneously
>    with the packages from the same group.
> * Packages with Group ID 0xFF are compatible with all other packages.
> 
> Signed-off-by: Aleksandr Loktionov <aleksandr.loktionov@...el.com>
> Tested-by: Andrew Bowers <andrewx.bowers@...el.com>
> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@...el.com>