lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  linux-cve-announce  PHC 
Open Source and information security mailing list archives
Hash Suite for Android: free password hash cracker in your pocket
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date:   Mon, 18 Jul 2022 13:40:45 -0400
From:   Sean Anderson <>
To:     Andrew Lunn <>
Cc:     "Russell King (Oracle)" <>,
        "David S . Miller" <>,
        Jakub Kicinski <>,
        Madalin Bucur <>,,
        Paolo Abeni <>,
        Eric Dumazet <>,,,
        Alexandru Marginean <>,
        Heiner Kallweit <>,
        Vladimir Oltean <>
Subject: Re: [PATCH net-next v3 08/47] net: phylink: Support differing link
 speeds and interface speeds

On 7/18/22 1:28 PM, Andrew Lunn wrote:
>> > I am rather worried that we have drivers using ->speed today in their
>> > mac_config and we're redefining what that means in this patch.
>> Well, kind of. Previously, interface speed was defined to be link speed,
>> and both were just "speed". The MAC driver doesn't really care what the
>> link speed is if there is a phy, just how fast the phy interface mode
>> speed is.
> I'm not sure that is true. At least for SGMII, the MAC is passed the
> line side speed, which can be 10, 100, or 1G. The PHY interface mode
> speed is fixed at 1G, since it is SGMII, but the MAC needs to know if
> it needs to repeat symbols because the line side speed is lower than
> the host side speed.

Right. In this case the phy interface speed is changing, so the MAC
needs to know about it. I suppose a more precise definition would be
something like

> The data rate of the media-independent interface between the MAC and
> the phy, without taking into account protocol overhead or flow control,
> but including encoding overhead.

as opposed to the link speed which is

> The data rate of the medium between the local device and the link
> partner, without ...


Powered by blists - more mailing lists