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Message-ID: <CAJ+vNU1-zoug5CoN4=Ut1AL-8ykqfWKGTvJBkFPajR_Z1OCURQ@mail.gmail.com>
Date: Mon, 14 Nov 2022 11:33:49 -0800
From: Tim Harvey <tharvey@...eworks.com>
To: Sean Anderson <sean.anderson@...o.com>
Cc: netdev <netdev@...r.kernel.org>,
Russell King <linux@...linux.org.uk>,
"David S. Miller" <davem@...emloft.net>
Subject: Re: status of rate adaptation
On Fri, Nov 11, 2022 at 2:38 PM Sean Anderson <sean.anderson@...o.com> wrote:
>
> On 11/11/22 17:14, Tim Harvey wrote:
> > On Fri, Nov 11, 2022 at 1:54 PM Sean Anderson <sean.anderson@...o.com> wrote:
> >>
> >> On 11/11/22 16:20, Tim Harvey wrote:
> >> > On Fri, Nov 11, 2022 at 12:58 PM Sean Anderson <sean.anderson@...o.com> wrote:
> >> >>
> >> >> On 11/11/22 15:57, Sean Anderson wrote:
> >> >> > Hi Tim,
> >> >> >
> >> >> > On 11/11/22 15:44, Tim Harvey wrote:
> >> >> >> Greetings,
> >> >> >>
> >> >> >> I've noticed some recent commits that appear to add rate adaptation support:
> >> >> >> 3c42563b3041 net: phy: aquantia: Add support for rate matching
> >> >> >> 7de26bf144f6 net: phy: aquantia: Add some additional phy interfaces
> >> >> >> b7e9294885b6 net: phylink: Adjust advertisement based on rate matching
> >> >> >> ae0e4bb2a0e0 net: phylink: Adjust link settings based on rate matching
> >> >> >> 0c3e10cb4423 net: phy: Add support for rate matching
> >> >> >>
> >> >> >> I have a board with an AQR113C PHY over XFI that functions properly at
> >> >> >> 10Gbe links but still not at 1Gbe,2.5Gbe,5.0Gbe,100M with v6.1-rc4
> >> >> >>
> >> >> >> Should I expect this to work now at those lower rates
> >> >> >
> >> >> > Yes.
> >> >
> >> > Sean,
> >> >
> >> > Good to hear - thank you for your work on this feature!
> >> >
> >> >> >
> >> >> >> and if so what kind of debug information or testing can I provide?
> >> >> >
> >> >> > Please send
> >> >> >
> >> >> > - Your test procedure (how do you select 1G?)
> >> >> > - Device tree node for the interface
> >> >> > - Output of ethtool (on both ends if possible).
> >> >> > - Kernel logs with debug enabled for drivers/phylink.c
> >> >>
> >> >> Sorry, this should be drivers/net/phy/phylink.c
> >> >>
> >> >> >
> >> >> > That should be enough to get us started.
> >> >> >
> >> >> > --Sean
> >> >>
> >> >
> >> > I'm currently testing by bringing up the network interface while
> >> > connected to a 10gbe switch, verifying link and traffic, then forcing
> >> > the switch port to 1000mbps.
> >> >
> >> > The board has a CN9130 on it (NIC is mvpp2) and the dt node snippets are:
> >> >
> >> > #include "cn9130.dtsi" /* include SoC device tree */
> >> >
> >> > &cp0_xmdio {
> >> > pinctrl-names = "default";
> >> > pinctrl-0 = <&cp0_xsmi_pins>;
> >> > status = "okay";
> >> >
> >> > phy1: ethernet-phy@8 {
> >> > compatible = "ethernet-phy-ieee802.3-c45";
> >> > reg = <8>;
> >> > };
> >> > };
> >> >
> >> > &cp0_ethernet {
> >> > status = "okay";
> >> > };
> >> >
> >> > /* 10GbE XFI AQR113C */
> >> > &cp0_eth0 {
> >> > status = "okay";
> >> > phy = <&phy1>;
> >> > phy-mode = "10gbase-r";
> >> > phys = <&cp0_comphy4 0>;
> >> > };
> >> >
> >> > Here are some logs with debug enabled in drivers/net/phy/phylink.c and
> >> > some additional debug in mvpp2.c and aquantia_main.c:
> >> > # ifconfig eth0 192.168.1.22
> >> > [ 8.882437] aqr107_config_init state=1:ready an=1 link=0 duplex=255
> >> > speed=-1 26:10gbase-r
> >> > [ 8.891391] aqr107_chip_info FW 5.6, Build 7, Provisioning 6
> >> > [ 8.898165] aqr107_resume
> >> > [ 8.902853] aqr107_get_rate_matching state=1:ready an=1 link=0
> >> > duplex=255 speed=-1 26:10gbase-r 0:
> >> > [ 8.911932] mvpp2 f2000000.ethernet eth0: PHY
> >> > [f212a600.mdio-mii:08] driver [Aquantia AQR113C] (irq=POLL)
> >> > [ 8.921577] mvpp2 f2000000.ethernet eth0: phy: 10gbase-r setting
> >> > supported 00000000,00018000,000e706f advertising
> >> > 00000000,00018000,000e706f
> >> > [ 8.934349] mvpp2 f2000000.ethernet eth0: mac link down
> >> > [ 8.948812] mvpp2 f2000000.ethernet eth0: configuring for
> >> > phy/10gbase-r link mode
> >> > [ 8.956350] mvpp2 f2000000.ethernet eth0: major config 10gbase-r
> >> > [ 8.962414] mvpp2 f2000000.ethernet eth0: phylink_mac_config:
> >> > mode=phy/10gbase-r/Unknown/Unknown/none adv=00000000,00000000,00000000
> >> > pause=00 link=0 an=0
> >> > [ 8.976252] mvpp2 f2000000.ethernet eth0: mac link down
> >> > [ 8.976267] aqr107_resume
> >> > [ 8.988970] mvpp2 f2000000.ethernet eth0: phy link down
> >> > 10gbase-r/10Gbps/Full/none/off
> >> > [ 8.997086] aqr107_link_change_notify state=5:nolink an=1 link=0
> >> > duplex=1 speed=10000 26:10gbase-r
> >> > [ 14.112540] mvpp2 f2000000.ethernet eth0: mac link up
> >> > [ 14.112594] mvpp2 f2000000.ethernet eth0: Link is Up - 10Gbps/Full
> >> > - flow control off
> >> > [ 14.112673] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
> >> > [ 14.118198] mvpp2 f2000000.ethernet eth0: phy link up
> >> > 10gbase-r/10Gbps/Full/none/off
> >> > [ 14.139808] aqr107_link_change_notify state=4:running an=1 link=1
> >> > duplex=1 speed=10000 26:10gbase-r
> >> >
> >> > # ethtool eth0
> >> > Settings for eth0:
> >> > Supported ports: [ ]
> >> > Supported link modes: 10baseT/Half 10baseT/Full
> >> > 100baseT/Half 100baseT/Full
> >>
> >> 10/100 half duplex aren't achievable with rate matching (and we avoid
> >> turning them on), so they must be coming from somewhere else. I wonder
> >> if this is because PHY_INTERFACE_MODE_SGMII is set in
> >> supported_interfaces.
> >>
> >> I wonder if you could enable USXGMII? Seems like mvpp2 with comphy
> >> should support it. I'm not sure if the aquantia driver is set up for it.
> >
> > This appears to trigger an issue from mvpp2:
> > mvpp2 f2000000.ethernet eth0: validation of usxgmii with support
> > 00000000,00018000,000e706f and advertisement
> > 00000000,00018000,000e706f failed: -EINVAL
>
> Ah, I forgot this was a separate phy mode. Disregard this.
>
> >>
> >> > 1000baseT/Full
> >> > 10000baseT/Full
> >> > 1000baseKX/Full
> >> > 10000baseKX4/Full
> >> > 10000baseKR/Full
> >> > 2500baseT/Full
> >> > 5000baseT/Full
> >> > Supported pause frame use: Symmetric Receive-only
> >> > Supports auto-negotiation: Yes
> >> > Supported FEC modes: Not reported
> >> > Advertised link modes: 10baseT/Half 10baseT/Full
> >> > 100baseT/Half 100baseT/Full
> >> > 1000baseT/Full
> >> > 10000baseT/Full
> >> > 1000baseKX/Full
> >> > 10000baseKX4/Full
> >> > 10000baseKR/Full
> >> > 2500baseT/Full
> >> > 5000baseT/Full
> >> > Advertised pause frame use: Symmetric Receive-only
> >> > Advertised auto-negotiation: Yes
> >> > Advertised FEC modes: Not reported
> >> > Link partner advertised link modes: 100baseT/Half 100baseT/Full
> >> > 1000baseT/Half 1000baseT/Full
> >> > 10000baseT/Full
> >> > 2500baseT/Full
> >> > 5000baseT/Full
> >> > Link partner advertised pause frame use: No
> >> > Link partner advertised auto-negotiation: Yes
> >> > Link partner advertised FEC modes: Not reported
> >> > Speed: 10000Mb/s
> >> > Duplex: Full
> >> > Port: Twisted Pair
> >> > PHYAD: 8
> >> > Transceiver: external
> >> > Auto-negotiation: on
> >> > MDI-X: Unknown
> >> > Link detected: yes
> >> > # ping 192.168.1.146 -c5
> >> > PING 192.168.1.146 (192.168.1.146): 56 data bytes
> >> > 64 bytes from 192.168.1.146: seq=0 ttl=64 time=0.991 ms
> >> > 64 bytes from 192.168.1.146: seq=1 ttl=64 time=0.267 ms
> >> > 64 bytes from 192.168.1.146: seq=2 ttl=64 time=0.271 ms
> >> > 64 bytes from 192.168.1.146: seq=3 ttl=64 time=0.280 ms
> >> > 64 bytes from 192.168.1.146: seq=4 ttl=64 time=0.271 ms
> >> >
> >> > --- 192.168.1.146 ping statistics ---
> >> > 5 packets transmitted, 5 packets received, 0% packet loss
> >> > round-trip min/avg/max = 0.267/0.416/0.991 ms
> >> > # # force switch port to 1G
> >> > [ 193.343494] mvpp2 f2000000.ethernet eth0: phy link down
> >> > 10gbase-r/Unknown/Unknown/none/off
> >> > [ 193.343539] mvpp2 f2000000.ethernet eth0: mac link down
> >> > [ 193.344524] mvpp2 f2000000.ethernet eth0: Link is Down
> >> > [ 193.351973] aqr107_link_change_notify state=5:nolink an=1 link=0
> >> > duplex=255 speed=-1 26:10gbase-r
> >> > [ 197.472489] mvpp2 f2000000.ethernet eth0: phy link up /1Gbps/Full/pause/off
> >>
> >> Well, it looks like we have selected PHY_INTERFACE_MODE_NA. Can you send
> >> the value of MDIO_PHYXS_VEND_IF_STATUS (dev 4, reg 0xe812)? Please also
> >> send the global config registers (dev 0x1e, reg 0x0310 through 0x031f)
> >> and the vendor provisioning registers (dev 4, reg 0xc440 through
> >> 0xc449).
> >
> > yes, this is what I've been looking at as well. When forced to 1000m
> > the register shows a phy type of 11 which according to the aqr113
> > datasheet is XFI 5G:
> > aqr107_read_status STATUS=0x00001258 (type=11) state=4:running an=1
> > link=1 duplex=1 speed=1000 interface=0
>
> That's pretty strange. Seems like it's rate adapting from 5g instead of
> 10g. Is SERDES Mode in the Global System Configuration For 1G register
> set to XFI?
1E.31C=0x0106:
Rate Adaptation Method: 2=Pause Rate Adaptation
SERDES Mode: 6=XFI/2 (XFI 5G)
Tim
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