netdev - Re: [PATCH net-next v2 6/9] net: macsec: hardware offloading infrastructure

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Date:   Tue, 13 Aug 2019 11:46:40 +0000
From:   Igor Russkikh <Igor.Russkikh@...antia.com>
To:     Andrew Lunn <andrew@...n.ch>,
        Antoine Tenart <antoine.tenart@...tlin.com>
CC:     "davem@...emloft.net" <davem@...emloft.net>,
        "sd@...asysnail.net" <sd@...asysnail.net>,
        "f.fainelli@...il.com" <f.fainelli@...il.com>,
        "hkallweit1@...il.com" <hkallweit1@...il.com>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "thomas.petazzoni@...tlin.com" <thomas.petazzoni@...tlin.com>,
        "alexandre.belloni@...tlin.com" <alexandre.belloni@...tlin.com>,
        "allan.nielsen@...rochip.com" <allan.nielsen@...rochip.com>,
        "camelia.groza@....com" <camelia.groza@....com>,
        Simon Edelhaus <Simon.Edelhaus@...antia.com>
Subject: Re: [PATCH net-next v2 6/9] net: macsec: hardware offloading
 infrastructure



On 10.08.2019 19:34, Andrew Lunn wrote:
> On Thu, Aug 08, 2019 at 04:05:57PM +0200, Antoine Tenart wrote:

>> The MACsec configuration is passed to device drivers supporting it
>> through macsec_hw_offload() which is called from the MACsec genl
>> helpers. This function calls the macsec ops of PHY and Ethernet
>> drivers in two steps
> 
> Hi Antoine, Igor
> 
> It is great that you are thinking how a MAC driver would make use of
> this. But on the flip side, we don't usual add an API unless there is
> a user. And as far as i see, you only add a PHY level implementation,
> not a MAC level.
> 
> Igor, what is your interest here? I know the Aquantia PHY can do
> MACsec, but i guess you are more interested in the atlantic and AQC111
> MAC drivers which hide the PHY behind firmware rather than make use of
> the Linux aquantia PHY driver. Are you likely to be contributing a MAC
> driver level implementation of MACsec soon?

Hi Andrew,

Yes, we are interested in MAC level MACSec offload implementation.
Although in our solution macsec engine itself is in Phy, we do
actively use firmware support in areas of configuration, interrupt management.

So from SW perspective that'll be MAC driver level macsec.

Regards,
  Igor