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

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Date:   Mon, 4 Mar 2019 08:41:59 +0000
From:   "Loktionov, Aleksandr" <aleksandr.loktionov@...el.com>
To:     Jakub Kicinski <jakub.kicinski@...ronome.com>,
        "Kirsher, Jeffrey T" <jeffrey.t.kirsher@...el.com>
CC:     "davem@...emloft.net" <davem@...emloft.net>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "nhorman@...hat.com" <nhorman@...hat.com>,
        "sassmann@...hat.com" <sassmann@...hat.com>,
        "Bowers, AndrewX" <andrewx.bowers@...el.com>
Subject: RE: [net-next 02/12] i40e: Implement DDP support in i40e driver

Good day dear ALL

Yes this link is 90% about DDP in DPDK usage, but other 10% about DDP.
IMHO we need to provide a link so interested users can find what DDP is.


Alex
ND ITP Linux 40G base driver TL 



-----Original Message-----
From: Jakub Kicinski [mailto:jakub.kicinski@...ronome.com] 
Sent: Friday, March 1, 2019 8:20 PM
To: Kirsher, Jeffrey T <jeffrey.t.kirsher@...el.com>
Cc: davem@...emloft.net; Loktionov, Aleksandr <aleksandr.loktionov@...el.com>; netdev@...r.kernel.org; nhorman@...hat.com; sassmann@...hat.com; Bowers, AndrewX <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-personalizati
> on-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>
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