Date: Sun, 26 May 2013 17:30:57 +0100 From: Joe Holden <lists@rewt.org.uk> To: Juli Mallett <jmallett@FreeBSD.org> Cc: Aleksandr Rybalko <ray@ddteam.net>, "freebsd-mips@FreeBSD.org" <freebsd-mips@freebsd.org> Subject: Re: Ubiquiti EdgeRouter Lite works multi-user with -CURRENT. Message-ID: <51A238C1.1020900@rewt.org.uk> In-Reply-To: <CACVs6=8LFHETGzQ1gcpOV-xnyDQ1acV2nhn6-5BE9d1TW6MGMg@mail.gmail.com> References: <CACVs6=_UHMvo6DSyXzvXxJ0eCcSsC%2Bk3yZ42ia5TGzgHduT2zA@mail.gmail.com> <51952112.9010607@rewt.org.uk> <20130517192206.5db0533f@zeta.dino.sk> <51966CB6.2040701@rewt.org.uk> <CACVs6=-0URQ2f7UqVxRdpuGpf103KOW9CTF6FFCGaGhvg3jOMw@mail.gmail.com> <20130520110659.1d1d2165@zeta.dino.sk> <D1F45DEB-3C3C-42D1-8EDE-94B18AB32152@bsdimp.com> <20130520164001.5f7d99b8@zeta.dino.sk> <C48F8AE6-316B-4C4A-AD2B-739C698B0AAC@bsdimp.com> <20130520172508.087daf7b@zeta.dino.sk> <CACVs6=8_y5Rqo9UHnQwbEancfZOqrqEAhcu=EXGGSGLjvayKVg@mail.gmail.com> <20130523070225.4d9a3a59@zeta.dino.sk> <519DA801.2090205@rewt.org.uk> <20130523075537.37e4bcba@zeta.dino.sk> <CACVs6=-hWxgmUS8fN4_68-di=iZiB-pOeNfh-RfjFRiaOASNTQ@mail.gmail.com> <20130523134206.69ea6994@zeta.dino.sk> <07C411D8-C5D3-4CD4-896B-844F6514C3DF@bsdimp.com> <CACVs6=8FhTND_WtFm%2BmdL2e=DoNXqMsCXg_X8XTNcD9Om6SB7Q@mail.gmail.com> <20130525163545.1fb37ea5@zeta.dino.sk> <CACVs6=8LFHETGzQ1gcpOV-xnyDQ1acV2nhn6-5BE9d1TW6MGMg@mail.gmail.com>
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Juli Mallett wrote: > On Sat, May 25, 2013 at 7:35 AM, Milan Obuch <freebsd-mips@dino.sk> wrote: > >> On Thu, 23 May 2013 10:56:04 -0700, Juli Mallett <jmallett@FreeBSD.org> >> wrote: >> >> [ snip ] >> >>> In this case, I'd say that the most useful thing to instrument is >>> likely cvm_do_timer in sys/mips/cavium/octe/ethernet.c. I'd suggest >>> first changing: >>> >>> 138 if (priv->need_link_update) { >>> 139 updated++; >>> 140 taskqueue_enqueue(cvm_oct_link_taskq, &priv->link_task); >>> 141 } >>> >>> To be just >>> >>> taskqueue_enqueue(cvm_oct_link_taskq, &priv->link_task); >>> >> It took me some time to respond for some reasons, anyway I built a >> kernel with this change and there is something clearly wrong. There is >> basically no change in behavior, if booted with gigabit connection, it >> works with gigabit speed but not with 100 megabit and vice versa. Just >> some cometic change - once per two seconds or so I keep getting on >> console following >> >> octe0: Link down >> octe1: Link down >> octe2: Link down >> >> It looks like some phy register is not read correctly or not correct >> phy register is read and acted upon. Just a guess, of course. >> Interesting thing also not yet mentioned here - ifconfig octeN output >> show correct speed in its media: line. >> >> Also, when changing cables, I got following printed on console: >> >> Port 0 receive error code 13, packet dropped >> >> No idea it if shows something, for now. >> >>> If that helps, then I think there's two things that need to be done: >>> >>> First, we shouldn't use slow-polling to do that anyway, we should just >>> call taskqueue_enqueue whenever we set need_link_update to 1 if it was >>> not 1 already. This is mostly a structural-cosmetic kind of thing. >>> >>> Second, cvm_oct_rgmii_poll in ethernet-rgmii.c is probably wrong in >>> some way. Instrumenting it to print out the various register states >>> and see if a human can see link status changes even if it can't may be >>> helpful. Alternately, you may want/need to look at UBNT's patches for >>> the ERLite. I may have missed some change it requires (if so, please >>> let me know rather than just committing the changes; I've tried to >>> isolate and keep minimal vendor-specific changes since we support so >>> many vendors; not every vendor shares my concern, and a lot of them >>> make the code too complex, or other things we don't want.) It could >>> be just a matter of not using/programming/undermining RGMII in the way >>> the hardware wants, or it could be that we need a PHY driver or >>> something else. >>> >>> Actually, looking at how the hardware is set up, it looks like we >>> should be using a PHY driver already, so it may be that none of that >>> is helpful (since the internal link status management is only used if >>> we don't have a PHY) and the real fix needs to happen in atphy.c. Or >>> that for this hardware we should just use the internal link status >>> management rather than using the PHY. >>> >> In dmesg, following is relevant to ethernet, I think: >> >> octebus0: <Cavium Octeon Ethernet pseudo-bus> on ciu0 >> Interface 0 has 3 ports (RGMII) >> Warning: Enabling IPD when IPD already enabled. >> Warning: Enabling PKO when PKO already enabled. >> octe0: <Cavium Octeon RGMII Ethernet> on octebus0 >> miibus0: <MII bus> on octe0 >> atphy0: <Atheros F1 10/100/1000 PHY> PHY 7 on miibus0 >> atphy0: OUI 0x00c82e, model 0x0007, rev. 2 >> atphy0: none, 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, >> 1000baseSX-FDX, 1000baseT-FDX, 1000baseT-FDX-master, auto octe0: bpf >> attached octe0: Ethernet address: dc:9f:db:29:a3:92 >> octe1: <Cavium Octeon RGMII Ethernet> on octebus0 >> miibus1: <MII bus> on octe1 >> atphy1: <Atheros F1 10/100/1000 PHY> PHY 6 on miibus1 >> atphy1: OUI 0x00c82e, model 0x0007, rev. 2 >> atphy1: none, 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, >> 1000baseSX-FDX, 1000baseT-FDX, 1000baseT-FDX-master, auto octe1: bpf >> attached octe1: Ethernet address: dc:9f:db:29:a3:93 >> octe2: <Cavium Octeon RGMII Ethernet> on octebus0 >> miibus2: <MII bus> on octe2 >> atphy2: <Atheros F1 10/100/1000 PHY> PHY 5 on miibus2 >> atphy2: OUI 0x00c82e, model 0x0007, rev. 2 >> atphy2: none, 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, >> 1000baseSX-FDX, 1000baseT-FDX, 1000baseT-FDX-master, auto octe2: bpf >> attached octe2: Ethernet address: dc:9f:db:29:a3:94 >> >> so maybe something should be done in atphy driver as someone mentioned >> later in this thread or between phy driver and some cavium code... I am >> going to try to undestand the code in cavium/octe directory, but any >> hint would be welcome for sure. >> > > Ok, well, I have a slightly-radical hint :) > > In cvm_oct_mdio_setup_device, set phy_id to -1 instead of to > cvmx_helper_board_get_mii_address(...). It's a silly thought, but I think > there's a chance it might work. This would be using the internal link > state management rather than using a PHY. (This isn't the right change to > make to effect that, but it's worth a shot.) > > Thanks, > Juli. Just gave that a shot - results in unknown link type and no connectivity
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