Hi Daniel, On Tue, 2016-08-16 at 17:12 +0200, Daniel Golle wrote: > Hi Alexey, > > On Tue, Aug 16, 2016 at 06:06:20AM +0000, Alexey Brodkin wrote: > > > > Hi Felix, > > > > On Wed, 2016-07-27 at 17:19 +0200, Felix Fietkau wrote: > > > > > > On 2016-07-27 14:11, Alexey Brodkin wrote: > > > > > > > > > > > > For some [still unknown] reason in ARC SDP boards > > > > DW GMAC doesn't enter promiscuous mode if eth0 gets > > > > added to the br-lan interface before Ethernet PHY finishes > > > > autonegotiation (PHY gets reset on DW GMAC start). > > > > > > I think this is something we need to look at more closely instead of > > > just papering over it in this way. By the way, arc* aren't the only ones > > > using stmmac, ipq806x uses it as well and might be equally affected. > > > Did you check if the network stack tells the driver to go into promisc > > > mode? Or does the frame filtering registers simply get clobbered > > > somewhere internally? > > > > > > Let's do some more testing and get this fixed properly... > > > > So I spent quite some time with that, short summary could be found here: > > http://lists.infradead.org/pipermail/linux-snps-arc/2016-August/001395.html > > > > Probably most important summary for us here is: > > ------------------------->8-------------------------- > > Unfortunately I cannot figure out why GMAC behaves that way. > > As per GMAC's databook the only reason for it to not react on a register > > being written is missing input clock but there's no reason for the > > clock to be missing and I don't seem to have a way to check if there's > > a problem with clock or not. > > ------------------------->8-------------------------- > > > > It worth trying on other boards with DW GMAC but the only other board > > except ARC SDP ones is Cubieboard2 with sunxi-gmac (which is a kind of > > DW GMAC as I may see from its Linux's driver) but on CB2 all works as > > exected. If somebody wants to volunteer I'll be more than happy to work > > with him/her trying to get more datapoints. > > stmac/dwmac works as expected on Oxford/PLXTECH OX82x/NAS782x (oxnas > target on OpenWrt/LEDE) as well.
That's good to know but remember what was my use-case to reproduce the problem in questions - DW GMAC must be put in promisq mode while PHY has no link established (the simplest option is to unplug the cable). Have you tried exactly that scenario? -Alexey _______________________________________________ Lede-dev mailing list Lede-dev@lists.infradead.org http://lists.infradead.org/mailman/listinfo/lede-dev
