On Mon, Mar 19, 2018 at 02:10:09PM +0100, Antoine Tenart wrote: > Hi Andrew, > > On Mon, Mar 19, 2018 at 01:59:53PM +0100, Andrew Lunn wrote: > > > > If they don't have PHYs, how are the connected to the outside world? > > On 7k/8k you have the following scheme for 10G only interfaces: > > MAC -- Comphy -- PHY -- SFP cage -- ... > > Or > > MAC -- Comphy -- SFP cage -- ... > > The comphy provides serdes lanes, and can be configured in various > modes (SGMII, 2500SGMII, 10GKR...).
Right - the correct mode is dependent on the SFP module plugged into the cage. Trying to describe this by ignoring the SFP cage isn't going to work out well for end-user functionality, though is fine if you're just hacking a configuration to test (which would not be suitable for mainline kernels!) As I've recently replied to Yan, this is a configuration I haven't tested yet, and it's entirely possible that phylink may need some tweaks for it. What you have is a very similar setup to what is on Clearfog with its SFP cage, where the SFP cage is connected directly to the Armada 388. That only has to deal with 2500base-X / 1000base-X / SGMII and not 10G. What I want is to avoid hacks as much as possible here - if there is a short-coming with SFP/phylink here, we need to address that properly. -- RMK's Patch system: http://www.armlinux.org.uk/developer/patches/ FTTC broadband for 0.8mile line in suburbia: sync at 8.8Mbps down 630kbps up According to speedtest.net: 8.21Mbps down 510kbps up
