netdev - Re: [PATCH net-next v3 5/5] net: documentation: add docs for MAC/PHY support in DPAA2

lists.openwall.net		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: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20191029020810.GJ15259@lunn.ch>
Date:   Tue, 29 Oct 2019 03:08:10 +0100
From:   Andrew Lunn <andrew@...n.ch>
To:     Ioana Ciornei <ioana.ciornei@....com>
Cc:     davem@...emloft.net, netdev@...r.kernel.org,
        laurentiu.tudor@....com, f.fainelli@...il.com,
        linux@...linux.org.uk
Subject: Re: [PATCH net-next v3 5/5] net: documentation: add docs for MAC/PHY
 support in DPAA2

> +DPAA2 Software Architecture
> +---------------------------
> +
> +Among other DPAA2 objects, the fsl-mc bus exports DPNI objects (abstracting a
> +network interface) and DPMAC objects (abstracting a MAC). The dpaa2-eth driver
> +probes on the DPNI object and connects to and configures a DPMAC object with
> +the help of phylink.

Does a DPMAC object always connect to a PHY? Can a DPMAC connect to
another DPMAC? I guess you would not normally do that, you would
connect a DPNI to a DPNI? But can you connect a DPMAC to a switch?

I guess it actually does not matter. Phylib/Phylink has the concept of
a fixed-link, which is used when there is no PHY and you need to
emulate it in order to configure the MAC. That will work here.

	Andrew