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PROCESSOR-SDK-AM335X: AM335x Gigabit ethernet lost package issue

lance lee
Prodigy 190 points
Part Number: PROCESSOR-SDK-AM335X

Hi TI team

I met a Gigabit ethernet communtation issue when using  AM335x + DP83867 in my design and need TI team urgent support, the following are the details:

MPU:  MPU partnumber is AM3354BZCZD60, both emacs connecte with tow DP83867 thorugh RGMII interface

PHY:  PHY partnumber is DP83848IRRGZ and it conneccted with AM335x thourg RGMII, VDDA1P8 (pins 13 and 48) are not used and were left unconnected

Issue: Both ETHs can work ok in 100M speed, however, under 1000M speed, communication packet loss is very serious when test ping command with larg packet( 1500 bytes or 65500bytes )

Is this a AM335x BSP driver issue ? Did the TI Am335x demo board use the DP83867 for dual gigabit ethernet ports design ? Can you provide some suggestions for analyzing and solving this issue? Thank you!

  • 0
    TI__Guru** 100980 points

    Hello Lance,

    Are you using the TI_RTOS SDK on the AM335x, the Linux SDK, or something else? Which version of which SDK are you using?

    Regards,

    Nick

  • 0 in reply to Tony Tang
    TI__Guru** 100980 points

    Hello Tony & Lance,

    Please provide the Linux SDK version that is being used.

    I am reassigning your thread to our Linux CPSW owner.

    Regards,

    Nick

  • 0 in reply to Nick Saulnier
    Prodigy 190 points

    Hi Nick,

    The Linux SDK version is: 06.03.00.106 and the following is the DT node related with ETH ports:

    &mac {
    pinctrl-names = "default","sleep";
    pinctrl-0 = <&cpsw_default>;
    pinctrl-1 = <&cpsw_sleep>;
    dual_emac = <1>;
    status = "okay";

    };

    &davinci_mdio {
    pinctrl-names = "default", "sleep";
    pinctrl-0 = <&davinci_mdio_default>;
    pinctrl-1 = <&davinci_mdio_sleep>;
    status = "okay";
    };

    &cpsw_emac0 {
    phy_id = <&davinci_mdio>, <0>;
    phy-mode = "rgmii-txid";
    dual_emac_res_vlan = <1>;
    };

    &cpsw_emac1 {
    phy_id = <&davinci_mdio>, <1>;
    phy-mode = "rgmii-txid";
    dual_emac_res_vlan = <2>;
    };


  • 0 in reply to lance lee
    Prodigy 190 points

    Hello Nick,

    any update or suggestions for analyzing/debugging this issue, thanks! 

  • 0 in reply to lance lee
    Prodigy 190 points

    Hello,

    The follow information is the output of the ifconfig and ethtool command when test packet loss issue with ping command (PC ping AM335x with 1500bytes packet size, almost 60~70% packet loss rate), no obvious error happened. However when I ping PC IP address from AM335x command line, it seems no packet lost.

    root@ES_Controller:~# ifconfig eth0
    eth0 Link encap:Ethernet HWaddr 34:08:E1:B9:B4:DE
    inet addr:192.168.100.100 Bcast:192.168.100.255 Mask:255.255.255.0
    inet6 addr: fe80::3608:e1ff:feb9:b4de/64 Scope:Link
    UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
    RX packets:3314 errors:0 dropped:0 overruns:0 frame:0
    TX packets:3076 errors:0 dropped:0 overruns:0 carrier:0
    collisions:0 txqueuelen:1000
    RX bytes:3187120 (3.0 MiB) TX bytes:3533678 (3.3 MiB)
    Interrupt:43

    root@ES_Controller:~# /ethtool -S eth0
    NIC statistics:
    Good Rx Frames: 4103
    Broadcast Rx Frames: 389
    Multicast Rx Frames: 984
    Pause Rx Frames: 0
    Rx CRC Errors: 0
    Rx Align/Code Errors: 0
    Oversize Rx Frames: 0
    Rx Jabbers: 0
    Undersize (Short) Rx Frames: 0
    Rx Fragments: 0
    Rx Octets: 3258058
    Good Tx Frames: 3036
    Broadcast Tx Frames: 0
    Multicast Tx Frames: 34
    Pause Tx Frames: 0
    Deferred Tx Frames: 0
    Collisions: 0
    Single Collision Tx Frames: 0
    Multiple Collision Tx Frames: 0
    Excessive Collisions: 0
    Late Collisions: 0
    Tx Underrun: 0
    Carrier Sense Errors: 0
    Tx Octets: 3517162
    Rx + Tx 64 Octet Frames: 482
    Rx + Tx 65-127 Octet Frames: 1972
    Rx + Tx 128-255 Octet Frames: 325
    Rx + Tx 256-511 Octet Frames: 72
    Rx + Tx 512-1023 Octet Frames: 8
    Rx + Tx 1024-Up Octet Frames: 4280
    Net Octets: 6784436
    Rx Start of Frame Overruns: 0
    Rx Middle of Frame Overruns: 0
    Rx DMA Overruns: 0
    Rx DMA chan 0: head_enqueue: 1
    Rx DMA chan 0: tail_enqueue: 5253
    Rx DMA chan 0: pad_enqueue: 0
    Rx DMA chan 0: misqueued: 0
    Rx DMA chan 0: desc_alloc_fail: 0
    Rx DMA chan 0: pad_alloc_fail: 0
    Rx DMA chan 0: runt_receive_buf: 0
    Rx DMA chan 0: runt_transmit_bu: 0
    Rx DMA chan 0: empty_dequeue: 0
    Rx DMA chan 0: busy_dequeue: 1168
    Rx DMA chan 0: good_dequeue: 3206
    Rx DMA chan 0: requeue: 0
    Rx DMA chan 0: teardown_dequeue: 0
    Tx DMA chan 0: head_enqueue: 777
    Tx DMA chan 0: tail_enqueue: 2259
    Tx DMA chan 0: pad_enqueue: 0
    Tx DMA chan 0: misqueued: 111
    Tx DMA chan 0: desc_alloc_fail: 0
    Tx DMA chan 0: pad_alloc_fail: 0
    Tx DMA chan 0: runt_receive_buf: 0
    Tx DMA chan 0: runt_transmit_bu: 666
    Tx DMA chan 0: empty_dequeue: 777
    Tx DMA chan 0: busy_dequeue: 1198
    Tx DMA chan 0: good_dequeue: 3036
    Tx DMA chan 0: requeue: 754
    Tx DMA chan 0: teardown_dequeue: 0

  • 0 in reply to lance lee
    TI__Mastermind 28992 points

    Schuyler，

    PHY team checked PHY status and confirmed there is no error in PHY status registers as below post:

    https://e2e.ti.com/support/interface-group/interface/f/interface-forum/1137315/dp83867ir-lost-package-issue-when-work-at-1000m-speed

    Any suggestion to check from AM335x MAC side?

  • 0 in reply to Tony Tang
    TI__Mastermind 28992 points

    Schuyler,

    Customer made modification on core PLL setting  CM_CLKSEL_DPLL from 0x3E817 to 0x3E917～0x3EC17, change M from 1000 to 1001-1004, the RGMII clock should adjust to 125.125 to 125.5MHz. now no package drop.

    Does it make sense?