Re: genphy_read_status() vs. 1000bT Pause capability
From: Russell King - ARM Linux <linux@armlinux.org.uk>
Date: 2017-03-28 11:37:22
On Tue, Mar 28, 2017 at 10:11:24PM +1100, Benjamin Herrenschmidt wrote:
On Tue, 2017-03-28 at 10:42 +0100, Russell King - ARM Linux wrote:quoted
The 1000X definitions are for 1000BaseX (fiber), not for 1000BaseT (copper). I have a working setup here with gigabit pause. The pause bits come from bits 11 and 10, just like for older copper PHYs. Your link parter is indicating that it has no pause capability. That means you can't use pause.Interesting. I tried and it worked :-) Could be something funny in the config of our switches.
It could be that the switch supports pause frames, but it's not advertised because there's some corner cases that it doesn't work. I know that SolidRun have run into switches that corrupt ethernet frames when pause is used. (I don't know off hand which they are, but I could ask the question.) -- RMK's Patch system: http://www.armlinux.org.uk/developer/patches/ FTTC broadband for 0.8mile line: currently at 9.6Mbps down 400kbps up according to speedtest.net.