DP83867IS: Inquiry regarding Ethernet speed degradation issue

Hi JH,

This is not a known issue. Can you please share a register dump from 0x0 - 0x1E of the DP83867?

Best regards,

Greg

Hi Greg,

Thank you for your reply.

Below is the customer's response.

root@cl-rfsoc-v2021_2:~# for r in $(seq 0 31); do

>     v=$(phytool read eth0/3/$r)

>     printf "0x%02x: 0x%04x\n" $r $((v))

> done

0x00: 0x1140

0x01: 0x796d

0x02: 0x2000

0x03: 0xa231

0x04: 0x09e1

0x05: 0xc5e1

0x06: 0x006d

0x07: 0x2001

0x08: 0x4801

0x09: 0x0300

0x0a: 0x3800

0x0b: 0x0000

0x0c: 0x0000

0x0d: 0x401f

0x0e: 0x00a8

0x0f: 0x3000

0x10: 0x5048

0x11: 0xae02

0x12: 0x0000

0x13: 0x0000

0x14: 0x2bc7

0x15: 0x1437

0x16: 0x0000

0x17: 0x0040

0x18: 0x6b50

0x19: 0x4444

0x1a: 0x0002

0x1b: 0x0000

0x1c: 0x0000

0x1d: 0x0000

0x1e: 0x0202

0x1f: 0x0000

root@cl-rfsoc-v2021_2:~# ethtool eth0

Settings for eth0:

        Supported ports: [ TP    MII ]

        Supported link modes:   10baseT/Half 10baseT/Full

                                100baseT/Half 100baseT/Full

                                1000baseT/Half 1000baseT/Full

        Supported pause frame use: Transmit-only

        Supports auto-negotiation: Yes

        Supported FEC modes: Not reported

        Advertised link modes:  10baseT/Half 10baseT/Full

                                100baseT/Half 100baseT/Full

                                1000baseT/Half 1000baseT/Full

        Advertised pause frame use: Transmit-only

        Advertised auto-negotiation: Yes

        Advertised FEC modes: Not reported

        Link partner advertised link modes:  10baseT/Half 10baseT/Full

                                             100baseT/Half 100baseT/Full

                                             1000baseT/Full

        Link partner advertised pause frame use: Symmetric

        Link partner advertised auto-negotiation: Yes

        Link partner advertised FEC modes: Not reported

        Speed: 1000Mb/s

        Duplex: Full

        Auto-negotiation: on

        master-slave cfg: preferred slave

        master-slave status: slave

        Port: MII

        PHYAD: 3

        Transceiver: external

        Link detected: yes

root@cl-rfsoc-v2021_2:~# dmesg | grep DP83867

[    5.159824] macb ff0b0000.ethernet eth0: PHY [ff0e0000.ethernet-ffffffff:03] driver [TI DP83867] (irq=POLL)

[    5.230292] macb ff0e0000.ethernet eth1: PHY [ff0e0000.ethernet-ffffffff:0c] driver [TI DP83867] (irq=POLL)

[    7.448802] macb ff0b0000.ethernet eth0: PHY [ff0e0000.ethernet-ffffffff:03] driver [TI DP83867] (irq=POLL)

[    7.513164] macb ff0e0000.ethernet eth1: PHY [ff0e0000.ethernet-ffffffff:0c] driver [TI DP83867] (irq=POLL)

root@cl-rfsoc-v2021_2:~# dmesg | grep eth0

[    2.378276] macb ff0b0000.ethernet eth0: Cadence GEM rev 0x50070106 at 0xff0b0000 irq 36 (2a:6c:23:95:c8:2e)

[    5.159824] macb ff0b0000.ethernet eth0: PHY [ff0e0000.ethernet-ffffffff:03] driver [TI DP83867] (irq=POLL)

[    5.159838] macb ff0b0000.ethernet eth0: configuring for phy/rgmii-id link mode

[    7.448802] macb ff0b0000.ethernet eth0: PHY [ff0e0000.ethernet-ffffffff:03] driver [TI DP83867] (irq=POLL)

[    7.448816] macb ff0b0000.ethernet eth0: configuring for phy/rgmii-id link mode

[   14.627206] macb ff0b0000.ethernet eth0: Link is Up - 1Gbps/Full - flow control off

[   14.627238] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready

[   19.745723] macb ff0b0000.ethernet eth0: Link is Down

[   26.914511] macb ff0b0000.ethernet eth0: Link is Up - 1Gbps/Full - flow control off

root@cl-rfsoc-v2021_2:~#

root@cl-rfsoc-v2021_2:~# iperf -s -i 1

------------------------------------------------------------

Server listening on TCP port 5001

TCP window size:  128 KByte (default)

------------------------------------------------------------

[  4] local 10.2.2.1 port 5001 connected with 10.2.2.11 port 33394

[ ID] Interval       Transfer     Bandwidth

[  4]  0.0- 1.0 sec  9.22 MBytes  77.3 Mbits/sec

[  4]  1.0- 2.0 sec  7.02 MBytes  58.9 Mbits/sec

[  4]  2.0- 3.0 sec  0.00 Bytes  0.00 bits/sec

[  4]  3.0- 4.0 sec   581 KBytes  4.76 Mbits/sec

[  4]  4.0- 5.0 sec  22.4 MBytes   188 Mbits/sec

[  4]  5.0- 6.0 sec  6.57 MBytes  55.1 Mbits/sec

[  4]  6.0- 7.0 sec  7.89 MBytes  66.2 Mbits/sec

[  4]  7.0- 8.0 sec  4.93 MBytes  41.4 Mbits/sec

[  4]  8.0- 9.0 sec  7.51 MBytes  63.0 Mbits/sec

[  4]  9.0-10.0 sec  6.49 MBytes  54.5 Mbits/sec

[  4]  0.0-10.0 sec  72.6 MBytes  60.8 Mbits/sec

root@cl-rfsoc-v2021_2:~# iperf -c 10.2.2.11 -i 1

------------------------------------------------------------

Client connecting to 10.2.2.11, TCP port 5001

TCP window size:  170 KByte (default)

------------------------------------------------------------

[  3] local 10.2.2.1 port 49156 connected with 10.2.2.11 port 5001

[ ID] Interval       Transfer     Bandwidth

[  3]  0.0- 1.0 sec   109 MBytes   916 Mbits/sec

[  3]  1.0- 2.0 sec   109 MBytes   918 Mbits/sec

[  3]  2.0- 3.0 sec   110 MBytes   925 Mbits/sec

[  3]  3.0- 4.0 sec   110 MBytes   927 Mbits/sec

[  3]  4.0- 5.0 sec   111 MBytes   929 Mbits/sec

[  3]  5.0- 6.0 sec   111 MBytes   929 Mbits/sec

[  3]  6.0- 7.0 sec   110 MBytes   922 Mbits/sec

[  3]  7.0- 8.0 sec   110 MBytes   926 Mbits/sec

[  3]  8.0- 9.0 sec   110 MBytes   927 Mbits/sec

[  3]  9.0-10.0 sec   110 MBytes   923 Mbits/sec

[  3]  0.0-10.0 sec  1.08 GBytes   924 Mbits/sec

root@cl-rfsoc-v2021_2:~#

Thanks,

JH

Hi JH,

Thank you for sharing the register dump. I will look over it and will get back to you as soon as possible.

Best regards,

Greg