The Toshiba neutrino ethernet bridge + AR8033 issue

最新推荐文章于 2025-05-09 10:01:50 发布

kinbo88

最新推荐文章于 2025-05-09 10:01:50 发布

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分类专栏：网络无线外设驱动

本文链接：https://blog.youkuaiyun.com/kinbo88/article/details/78951257

博客详细记录了Toshiba Neutrino以太网桥在1000M模式下无法ping通PC的问题，包括测试步骤、日志分析、同事讨论和PHY寄存器检查。问题在于1000M时收发数据失败，通过调整SerDes测试和系统模式控制寄存器解决，并发现EEE功能可能导致的包丢失问题。解决方案是禁用EEE特性，从而在1000M速度下实现稳定通信。

1 Issue:

The Toshiba neutrino ethernet driver cann't ping PC:

Add dts node "qcom,ntn_avb" in our dts, ping success on 100M.

But it ping fail on 1000MHz.

1.1 Test step:

push the Neutrino firmware(DWC_ETH_QOS_fw.bin) to /tmp:
overlay the /lib/firmware/ by tmp
cd /tmp
mkdir upper work
mount -t overlay overlay -olowerdir=/lib,upperdir=/tmp/upper,workdir=/tmp/work /lib
cp /tmp/DWC_ETH_QOS_fw.bin /lib/firmware/
insmod the driver:
modprobe DWC_ETH_QOS.ko fw_filename=DWC_ETH_QOS_fw.bin
config device and PC ip on same subnet
ifconfig eth0 192.168.225.3 up

1.2 Test status:

Use Usb-Ethernet adapter(100M) connect PC, DUT connect the adapter, DUT can ping PC success each other .
DUT connect PC, ping fail.
Use 100M SWITCH connect our DUT and PC, DUT can ping PC success each other .
Use 1000M SWITCH connect our DUT and PC, ping fail.
change network cable ,the same result.
use toshiba release driver, the same test result.

2 investigate method

2.1 adjust between 100M and 1000M

from the 100M dmesg log:
DWC_ETH_QOS 0000:01:00.0 eth0: Link is Up - 100Mbps/Full - flow control rx/tx
But from 1000M dmesg log:
DWC_ETH_QOS 0000:01:00.0 eth0: Link is Up - 1Gbps/Full - flow control of

This log from kernel/drivers/net/phy/phy.c phy_print_status() ,and be called by DWC_ETH_QOS_adjust_link.
In DWC_ETH_QOS_adjust_link():

case SPEED_1000:

hw_if->set_gmii_speed(pdata);

hw_if->ntn_set_tx_clk_125MHz(pdata);

break;

case SPEED_100:

hw_if->set_mii_speed_100(pdata);

hw_if→ntn_set_tx_clk_25MHz(pdata);

Eth0 related attribute node:

root@swi-mdm9x40:~# cd /sys/class/net/eth0
root@swi-mdm9x40:/sys/devices/80000.qcom,pcie/pci0000:00/0000:00:00.0/0000:01:00.0/net/eth0# ls
addr_assign_type device            mtu               statistics
addr_len          dormant           name_assign_type subsystem
address           duplex            netdev_group      tx_queue_len
broadcast         flags             operstate         type
carrier           ifalias           phys_port_id      uevent
carrier_changes   ifindex           power
dev_id            iflink