【Mellanox网卡PCIe信息之CX4 25G】MCX4121A-ACAT型号显示信息（lspci -vv -s 0000:04:00.0）

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已于 2024-04-28 00:58:52 修改

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分类专栏： Mellanox专区-OFED&DOCA&RDMA 文章标签： mellanox

于 2024-04-28 00:52:12 首次发布

本文链接：https://blog.youkuaiyun.com/essencelite/article/details/138261831

本文详细描述了一块MCX4121A-ACAT型号的MellanoxConnectX-4Lx网卡，包括其PCIe3.0x8接口、25GbE双端口SFP28规格，以及支持的SR-IOV、MSI-X、AER等功能，展示了lspci输出的详细信息。

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背景

特此记录通用信息归档。本文记录的是MCX4121A-ACAT (Subsystem: Mellanox Technologies Stand-up ConnectX-4 Lx EN, 25GbE dual-port SFP28, PCIe3.0 x8, MCX4121A-ACAT)。
因为目前手上只有淘宝购买的CX4网卡，后期有其他网卡逐渐补充。
网卡的购买链接：https://item.taobao.com/item.htm?_u=sb62mrqd77f&id=680158299540
网卡实体情况：在这里插入图片描述

详细不同级别输出信息

说明：lspci的参数信息：

-v     Be verbose and display detailed information about all devices.
-vv    Be very verbose and display more details. This level includes everything deemed useful.
-vvv   Be  even more verbose and display everything we are able to parse, even if it doesn't look interesting at all (e.g., undefined memory regions).
 -s [[[[<domain>]:]<bus>]:][<device>][.[<func>]] Show only devices in the specified domain

-v

命令：

export eth0=enp4s0f0 && sudo lspci -v -s `ethtool -i $eth0 | awk '/bus-info:/ {print $2}'`

输出：

04:00.0 Ethernet controller: Mellanox Technologies MT27710 Family [ConnectX-4 Lx]
        Subsystem: Mellanox Technologies Stand-up ConnectX-4 Lx EN, 25GbE dual-port SFP28, PCIe3.0 x8, MCX4121A-ACAT
        Flags: bus master, fast devsel, latency 0, IRQ 64, NUMA node 0
        Memory at d0000000 (64-bit, prefetchable) [size=32M]
        Expansion ROM at d9000000 [disabled] [size=1M]
        Capabilities: [60] Express Endpoint, MSI 00
        Capabilities: [48] Vital Product Data
        Capabilities: [9c] MSI-X: Enable+ Count=64 Masked-
        Capabilities: [c0] Vendor Specific Information: Len=18 <?>
        Capabilities: [40] Power Management version 3
        Capabilities: [100] Advanced Error Reporting
        Capabilities: [150] Alternative Routing-ID Interpretation (ARI)
        Capabilities: [180] Single Root I/O Virtualization (SR-IOV)
        Capabilities: [1c0] Secondary PCI Express
        Capabilities: [230] Access Control Services
        Kernel driver in use: mlx5_core
        Kernel modules: mlx5_core

-vv

命令：

export eth0=enp4s0f0 && sudo lspci -vv -s `ethtool -i $eth0 | awk '/bus-info:/ {print $2}'`

输出：

04:00.0 Ethernet controller: Mellanox Technologies MT27710 Family [ConnectX-4 Lx]
        Subsystem: Mellanox Technologies Stand-up ConnectX-4 Lx EN, 25GbE dual-port SFP28, PCIe3.0 x8, MCX4121A-ACAT
        Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+
        Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
        Latency: 0, Cache Line Size: 64 bytes
        Interrupt: pin A routed to IRQ 64
        NUMA node: 0
        Region 0: Memory at d0000000 (64-bit, prefetchable) [size=32M]
        Expansion ROM at d9000000 [disabled] [size=1M]
        Capabilities: [60] Express (v2)</