Linux read phy registers ethtool.
Oct 12, 2017 · 文章浏览阅读5.
Linux read phy registers ethtool You need to read the datasheet for the chip. Management Port Enable bit: User will first need to enable the Management port: Using devmem to read the PHY registers: Nov 28, 2019 · 查看MAC和PHY配置和状态工具有 mii-tool/ethtool. Dec 9, 2020 · PHY Management Register: The PHY management register can be seen below. Below example shows how to set speed or duplex mode using ethtool command is as follows: # ethtool -s eth0 speed 100 duplex full # ethtool -s eth0 speed 10 Mar 30, 2020 · 在Linux驱动框架下，MDIO总线总共划分为三个小框架，这三个框架共同构成MDIO总线框架，分别为： 、和 针对 抽象为针对 抽象为针对 抽象为 大致框架如下： 每一个 都有一个指针，通过该指针可以将dev和drv关联起来；然后又可以通过将所有的关联起来，统一由管理 3. 经常使用的工具是ethtool, ethtool可以详细的描述MAC和PHY的相关信息，包括寄存器的配置，相关的统计。 In this simple demo, we will see how to manually read the PHY registers over MDIO. Definition at line 261 of file mdio_bus. 3 of the TRM is register that indicates if a PHY is showing up in the polling process, this should be independent of sw and should let you know the part is seeing the PHY. It's not guaranteed any valid answer from PHY while PHY communication can even hang. 3ah draft for Clause 22) for accessing the extended register set. For a full list, see include/linux/phy. h for definitions for these bitfields. This will help in development or issue debug. So what should be the access strategy Oct 31, 2023 · I want to read/modify the Phy registers at Linux, please note that iam able to read/modify the phy at u-boot using : mii read and mii write commands, but iam unable to read/modify when the linux boots. With driver e1000e will fail while reading register 0x07. The read and write commands are simple register level accessors. Do not use. local ethtool -s eth0 speed 100 duplex full autoneg on 1>/dev/null 2>/dev/null ethtool -s eth1 speed 100 duplex full autoneg on 1>/dev/null 2>/dev/null 5. Retrieves and prints a register dump for the specified network device. Jun 25, 2022 · 除了通信时得外，每个出厂前还有厂家的唯一标识，因为phy都遵循国际标准，所以寄存器和两个寄存器就负责存储该信息，以为例，如下图： 会自动扫描新添加的，其机制就是扫描寄存器，若有返回值，则说明存在，将其添加到总线上，具体源码实现如下： 3. Here is a comprehensive guide to the options available with the ethtool command in linux −. Now the DP83620 registers are 16 bits. 既然没有从寄存器中获取到phy_id，因此phy_device_create也不会在mii bus数据结构中创建phy_device， Jul 30, 2011 · No idea. That is what the phy_read_paged and phy_write_paged functions do. I suspect you will need to set up a register somewhere in the driver, not aware of any tools that will do that for you. Mar 9, 2023 · I figured out how it works: The basic standard MDIO address consists of 5 bits and therefore only the [0. Alert: If used three times, will force reading all MII registers, including non standard ones. PHY Abstraction Layer¶ Purpose¶. com ethtool is used to query and control network device driver and hardware settings, particularly for wired Ethernet devices. Oct 30, 2023 · I want to read/modify the Phy registers at Linux, please note that iam able to read/modify the phy at u-boot using : mii read and mii write commands, but iam unable to read/modify when the linux boots. This is a handy tool to read and write registers of a PHY attached to a network device. Regarding the devmem2 tool, it can read the DM814x Ethernet subsystem registers, but it seams can not read the PHY registers, as these are external for the DM814x device and have some complexity for the read/write operations (see TRM MDIO). 5. Shows a short help message. ) mii-tool – Deprecated. 32] range can be accessed directly. I am also using the following command to change the interface settings for the OPtical to work, and it is working fine. Examples # miitool r eth0 1 # miitool w eth0 0 0x1000. * @phydev: the phy_device struct */ static inline bool phy_is_pseudo_fixed_link(struct phy_device *phydev) { return phydev->is_pseudo_fixed_link; } int phy_save_page(struct phy_device *phydev); int phy_select_page(struct phy_device *phydev, int page); int phy_restore_page(struct phy_device *phydev, int oldpage, int ret); int phy_read_paged Jul 6, 2022 · # cat /etc/rc. PLease provide your help/support. 2k次。Linux+arm 网卡故障调试：ethtool&phy寄存器读写两个工具一个是ethtool工具，一个是源码编译的可以读phy寄存器的工具phyreg。 Dec 19, 2023 · 文章浏览阅读1. 10. For example, ptp_tx[i]_packets will not be explicitly documented since tx[i]_packets describes the behavior of both counters, except ptp_tx[i]_packets is only counted when precision time protocol is used. ethtool -s fm1-mac3 autoneg off speed 1000 duplex full No Motivation: Knowing the current settings of your network interface is crucial for diagnosing network-related performance issues. Ethernet PHY registers tool provide a simple way to read/write PHY registers by MDC/MDIO. Thank you! The values of phy_interface_t must be understood from the perspective of the PHY device itself, leading to the following: * PHY_INTERFACE_MODE_RGMII: the PHY is not responsible for inserting any internal delay by itself, it assumes that either the Ethernet MAC (if capable or the PCB traces) insert the correct 1. 4k次，点赞2次，收藏3次。PHY子系统是Linux内核中管理硬件物理层的组件，负责控制器和PHY设备的驱动。该子系统提供了如phy_create、phy_destroy等核心API，用于设备的创建、销毁以及与硬件的交互。 Mar 29, 2024 · 可以用一下两种方法来获取 Linux 中的以太网 PHY 寄存器数据 方法 1: 使用ETHTOOL 如果 ethtool 在内核中不可用，则通过配置用户空间package，增加ethtool工具并重新编译； 安装该工具后，使用以下命令配置和显示以太网接口参数的 ethtool [option] devname Purpose¶. MII read: This is the only command which can and must be used in U-boot. Mar 12, 2014 · I am familiar with the mii-tool IOCTL calls which could be used to access a PHY device's MII registers something like this: static int mdio_read(int skfd, int location){ struct mii_data *mii = ( Jan 3, 2023 · There are many utilities that can be run from the terminal prompt of the Linux PHY host, among them are: ethtool – Popular and widely available, but with some problems. The manufacturer (RTK) of the device PHY has provided a register of our PHY to clarify the problem. Best regards igor-----Note: If this post answers your question, please click the Correct Answer button. This article is an attempt to summarise the most useful ethtool commands with examples Ethool provides…. Not all MDIO drivers support the port:device Clause 45 address format. In PHY mode, we use phylib to read the current link settings from the PHY, and pass them to the MAC driver. Table of Contents. Most network devices consist of set of registers which provide an interface to a MAC layer, which communicates with the physical connection through a PHY. eth0, eth1, etc. 使用以下命令来读取PHY寄存器： ``` sudo ethtool -r <interface> [dev_addr] [offset] ``` 在上述命令中，`<interface>`是您要读取的网络接口的名称，`[dev_addr]`是可选的PHY设备地址，`[offset]`是要读取的寄存器偏移量。 Dec 23, 2023 · FreeMASTER; eIQ Machine Learning Software; Embedded Software and Tools Clinic; S32 SDK; S32 Design Studio; GUI Guider; Zephyr Project; Voice Technology; Application Software Packs Apr 1, 2015 · 最关键的函数就是它，也就是本文的核心，这里是从寄存器中通过mdiobus的read方法来从phy中获取phy id，但是这里并没有获取到phy_id ，这寄存器都是以太网的通用寄存器. License. For example, the DP83867 on the GESI board. The register format for some devices is known and decoded others are printed in hex. But in my case they are connected directly to the external switch and are not used by Linux. Stop the autoboot process as shown here, and type the following: “mii read {PHY ID} {register address}” See full list on github. This could be the case if a PHY was released for If used twice, also display raw MII register contents. All counters listed here are available via ethtool starting with MLNX_OFED 4. (Register dump incomprehensible, so checking raw register values not possible. How do I then interpret the dump. If file is specified, then use contents of previous raw register dump, rather than reading from the device. ethtool is used to query and control network device driver and hardware settings, particularly for wired Ethernet devices. Does not support Gigabit speeds. Dear Dave, Thanks for the reply. sh < command > [args] setup -setup phytool and ethtool required for demo WARNING: will override system tools dump_regs < eth >-show all reg values WARNING: some registers will be cleared on read phy_read_mmd < eth > < reg-addr >-read value from a MMD register phy_write_mmd < eth > < reg-addr > < val >-write value to MMD Descriptions¶. devname is the name of the network device on which ethtool should operate. Mans, It seems that ethtool can be used for register dump on a desktop PC, but register dump on DM814x device is not supported with ethtool. Although i used the ethtool -d command, but it is not working in the linux. Feb 13, 2021 · If the PHY supported more than 32 registers, the vendor could define one of the vendor-specified registers as a "page select" register to select different banks of 32 vendor-specified registers. ethtool with a single argument specifying the device name prints current settings of the specified device. GitHub - wkz/phytool: Linux MDIO register access . In function phy_mii_ioctl i put the calls to phy_read and phy_write inside mutex locks and commented any particular switch that could be made based on the register being written via ioctl (in fact my phy does have paged register and register 1 is the status register only if the selected page is 0) and I was not going to alter control registers When raw is enabled, then ethtool dumps the raw register data to stdout. This post shows the list of ethtool counters applicable for ConnectX-4 and above (mlx5 driver). We expect the MAC driver to configure exactly the modes that are specified without any negotiation being enabled on the link. Dec 23, 2023 · I want to read/modify the Phy registers at Linux, please note that iam able to read/modify the phy at u-boot using : mii read and mii write commands, but iam unable to read/modify when the linux boots. e. For ease of use, users should use utilities such as mii dump in u-boot or similar in Linux too. . We want to clarify whether it is a MAC problem or a PHY problem. Usage: adintool. XSK, PTP, and QoS counters that are similar to counters defined previously will not be separately listed. Oct 31, 2023 · I want to read/modify the Phy registers at Linux, please note that iam able to read/modify the phy at u-boot using : mii read and mii write commands, but iam unable to read/modify when the linux boots. The print command will pretty-print a register. ethtool emerged as a modern and standardized utility for controlling Ethernet devices, largely superseding older, more limited tools like mii-tool. -V, --version Display program version information. Oct 12, 2017 · 文章浏览阅读5. Set Duplex Mode. Examples phytool read eth0/0:3/1 phytool Oct 30, 2023 · I want to read/modify the Phy registers at Linux, please note that iam able to read/modify the phy at u-boot using : mii read and mii write commands, but iam unable to read/modify when the linux boots. 0. h. The 2-Clause Tool/software: Linux. Most of the Ethernet PHY support multi-functions and provide much more flexible configure capability to fine tune timing or function enable by configure their registers. Its development was driven by the increasing sophistication of network interface cards and the need for a unified interface to manage diverse hardware features, including advanced offloading capabilities and power management. Aug 23, 2019 · Ethtool is a user space utility for displaying and configuring the Network Interface Unit. Mar 23, 2020 · Accessing ethernet phy driver from linux user space - Stack Overflow . c. 6以上通用。 Mar 4, 2025 · 在 Linux 中读写网口 PHY 芯片寄存器，可以使用 MII 工具或者 ethtool 命令。 MII 工具是一个命令行工具，可以通过它来控制网口的 PHY 器件。 Usage: adintool. For devices that offer additional registers beyond the basic standard, there is an MDIO Manageable Device (MMD) indirect method (defined in IEEE 802. NOTE: MUST NOT be called from interrupt context, because the bus read/write functions may wait for an interrupt to conclude the operation. Notes. When using the print command, the register is optional. 5-2ns delay * PHY_INTERFACE_MODE Dec 4, 2024 · Linux 下smi/mdio总线通信韩大卫@吉林师范大学下面代码描述了在用户层访问smi／mdio总线， 读写phy芯片寄存器的通用代码。Linux内核2. 2 MDIO MAP作用 从注册mdio总线设备 Aug 25, 2018 · 1、总结： 使用ethtool 可以查看端口的phy配置 2、显示端口配置 [root@localhost zhou]# ethtool ens33Settings for ens33: Supported ports: [ TP ] Supported link modes: 10baseT/Ha 使用ethtool显示硬件PHY信息 - 七连长 - 博客园 - check the MDIO PHY alive register in MDIO, 14. See include/linux/ethtool. I get a dump of hex bytes. Oct 24, 2022 · There are several different tools available in a Linux environment to read and write registers on a TI PHY. Note: The post also provides a reference to ConnectX-3/ConnectX-3 Pro counters that co-exist for the mlx4 driver (see notes below). Whether you are trying to troubleshoot a connectivity issue, verify the link speed, or simply document the current network configuration for auditing purposes, ethtool provides a comprehensive output that covers key parameters like supported link modes, current link Linux网卡驱动架构 MAC控制器驱动是芯片厂商集成在SDK中 比如三星控制器、海思控制器，这部分驱动厂商已经写好了， linux下自带通用phy驱动phy_device. Prerequisites to Use ethtool; How to use ethtool in Linux? Manage Ethernet Flow Control with ethtool; Modify PAUSE Parameters Part Number: TDA4VM Hi, How is it possible to read and write to PHY register via MDIO, which is connected to the CPSW with the ETHFW running on RTOS. Sep 28, 2023 · 使用`ethtool`命令读取PHY寄存器的具体步骤如下： 1. 确定您要读取的网络接口名称，例如`eth0`。 2. Thank u. We shall use this to access the PHY registers. sh <command> [args] setup - setup phytool and ethtool required for demo WARNING: will override system tools dump_regs <eth> - show all reg values WARNING: some registers will be cleared on read phy_read_mmd <eth> <reg-addr> - read value from a MMD register phy_write_mmd <eth> <reg-addr> <val> - write value to MMD register cable_diagnostics <eth> - run cable diagnostics on cable Mar 30, 2018 · I have a non ethernet phy device connected to the mdio bus; I want to access the registers of this device from the user space. If left out, the most common registers will be shown. -e --eeprom-dump System administrators frequently use the ethtool for network diagnostics and performance optimization. However, I have no idea of the implications on the running of the ethernet at the Linux level, probably just stops working. Jan 17, 2017 · 本文介绍如何利用ethtool工具检查及调整网卡工作状态，包括速率与双工模式等参数，并通过phyreg工具读写PHY寄存器实现更深层次的网络设备管理。 linux+arm 网卡故障调试：ethtool&phy寄存器读写 Purpose¶. However, the flow below shows how this can be done simply via devmem incase such utilities are unavailable. the solution is only working, when the phys are configured as Ethernet devices in the Linux. I want to read out the PHY registers for inspection, and found ethtool --register-dump eth0. c（phy层协议是通用标准 这个驱动对市场上的多数phy是支持的，难免部分厂商搞特例独行的特性，需要在初始化的时候进行简单寄存器的修改和配置才能 Purpose¶. Several of these options are listed below. Jan 10, 2013 · mdiobus_read - Convenience function for reading a given MII mgmt register : the mii_bus struct : the phy address : register number to read. I have a DP83620 which on some devices display's LED_LINK inversed. When raw is enabled, then ethtool dumps the raw register data to stdout. Aug 31, 2018 · i want to access ethernet phy driver from linux user space, In uboot we can directly access phy registers using mii commands similarly i want to read and write phy registers from linux user spac PHY Abstraction Layer¶ Purpose¶. Purpose¶. In order to analyse and show the value in Linux environment, and I needs to read and write the value of phy register via MDIO. Users can view this in the Zynq Ultrascale register reference here. As the phy device is not an ethenet phy I am a bit confused; it is not expected to link with rest of the ethernet sub system, should not be having any interface, i. Is register 00H the first two bytes "01 02"? And what is the Alert: If used three times, will force reading all MII registers, including non standard ones. Dec 23, 2023 · Hi , I have used the patched and now iam able to successfully modify the phy registers at the OS level using the phytool. omwovppvalmixonppypkwbwunolwpadqjpskhlnwabfqwmehmqvwkbwuxze