Messages in this thread | | | Date | Tue, 17 Jul 2018 10:47:33 +0900 (JST) | Subject | Re: [RFC PATCH 0/1] net: phy: skip autoneg of ethernet(fec) on network boot | From | Masahiko KIMOTO <> |
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> > You said that the PHY is being configured 3 times, and might be doing > > auto-neg three times. Often a phy will not actually perform auto-neg, > > or do it much faster, if the advertised bits do not change with each > > re-configuration. > > > > So check how u-boot is configuring what is advertised, and look at > > what Linux is configuring. In particularly, look at the pause > > configuration. If pause is configured different in u-boot and Linux, > > try to make it the same. Things might go faster than. > > Thank you. > > I'll try to check out u-boot side by mii command and Linux(server) > side by ethtool.
PHY setting in u-boot and after booting Linux is as follows;
We may avoid second and third auto-neg if both settings in u-boot and in linux make same value, right?
--------------------------------------------------------------------------- => mii dump 1 4 4. (11e1) -- Autonegotiation advertisement register -- (8000:0000) 4.15 = 0 next page able (4000:0000) 4.14 = 0 (reserved) (2000:0000) 4.13 = 0 remote fault (1000:1000) 4.12 = 1 (reserved) (0800:0000) 4.11 = 0 asymmetric pause (0400:0000) 4.10 = 0 pause enable (0200:0000) 4. 9 = 0 100BASE-T4 able (0100:0100) 4. 8 = 1 100BASE-TX full duplex able (0080:0080) 4. 7 = 1 100BASE-TX able (0040:0040) 4. 6 = 1 10BASE-T full duplex able (0020:0020) 4. 5 = 1 10BASE-T able (001f:0001) 4. 4- 0 = 1 selector = IEEE 802.3
=> mii dump 1 5 5. (dd01) -- Autonegotiation partner abilities register -- (8000:8000) 5.15 = 1 next page able (4000:4000) 5.14 = 1 acknowledge (2000:0000) 5.13 = 0 remote fault (1000:1000) 5.12 = 1 (reserved) (0800:0800) 5.11 = 1 asymmetric pause able (0400:0400) 5.10 = 1 pause able (0200:0000) 5. 9 = 0 100BASE-T4 able (0100:0100) 5. 8 = 1 100BASE-X full duplex able (0080:0000) 5. 7 = 0 100BASE-TX able (0040:0000) 5. 6 = 0 10BASE-T full duplex able (0020:0000) 5. 5 = 0 10BASE-T able (001f:0001) 5. 4- 0 = 1 selector = IEEE 802.3
--------------------------------------------------------------------------- root@imx6qdlsabresd:~# ethtool eth0 Settings for eth0: Supported ports: [ TP MII ] Supported link modes: 10baseT/Half 10baseT/Full 100baseT/Half 100baseT/Full 1000baseT/Full Supported pause frame use: Symmetric Supports auto-negotiation: Yes Advertised link modes: 10baseT/Half 10baseT/Full 100baseT/Half 100baseT/Full 1000baseT/Full Advertised pause frame use: Symmetric Advertised auto-negotiation: Yes Link partner advertised link modes: 100baseT/Full 1000baseT/Full Link partner advertised pause frame use: Symmetric Receive-only Link partner advertised auto-negotiation: Yes Speed: 1000Mb/s Duplex: Full Port: MII PHYAD: 1 Transceiver: internal Auto-negotiation: on Supports Wake-on: d Wake-on: d Link detected: yes
root@imx6qdlsabresd:~# ethtool -a eth0 Pause parameters for eth0: Autonegotiate: on RX: off TX: off RX negotiated: on TX negotiated: on
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--------------------------------------------------------------------------- Masahiko KIMOTO,Ph.D. / Cybertrust Japan Co., Ltd. mail: masahiko.kimoto@cybertrust.co.jp web: https://www.cybertrust.co.jp/ https://www.miraclelinux.com/
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