PCIe常用命令

$ sudo apt-get install pciutils    # 安装lspci命令
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example：

$ lspci                      # 列出所有连接PCI接口的外部设备
$ lspci -v                   # 列出所有连接PCI接口的外部设备（内容更详细）
$ lspci --help               # 其他选项参考帮助信息
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1. 参数

2. 用法举例

# 1.查询系统上电阶段扫描到的PCIe设备
[DPTECH-Developer-Shell]lspci -v -t
-[0000:00]-+-00.0  Device 8086:1980
           +-04.0  Device 8086:19a1
           +-05.0  Device 8086:19a2
           +-06.0-[01-02]----00.0  Device 8086:19e2
           +-09.0-[03]----00.0  Device 8086:1533      # 以此为例：bus是0x03，device是0x00，function是0x0，BDF表示为03:00.0，与之对应的上游端口是00:09.0
           +-0a.0-[04]----00.0  Device 8086:1533   

# 2.列出该设备的PCIe详细配置空间信息：0x00起始地址是PCIe的Vendor ID和Device ID。
[DPTECH-Developer-Shell]lspci -xxx -s 03:00.0
03:00.0 Class 0200: Device 8086:1533 (rev 03)
00: 86 80 33 15 47 05 10 00 03 00 00 02 20 00 00 00  ## Vendor_ID  Device_ID
10: 00 00 70 85 00 00 00 00 01 70 00 00 00 00 80 85
20: 00 00 00 00 00 00 00 00 00 00 00 00 ff ff 00 00
# ………………省略部分输出信息………………

# 3.查看设备特性
[DPTECH-Developer-Shell]lspci -vvv -s 03:00.0
03:00.0 Class 0200: Device 8086:1533 (rev 03)
        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: 128 bytes
        Interrupt: pin A routed to IRQ 16
        Region 0: Memory at 85700000 (32-bit, non-prefetchable) [size=1M]
        Region 2: I/O ports at 7000 [size=32]
        Region 3: Memory at 85800000 (32-bit, non-prefetchable) [size=16K]
        Expansion ROM at <ignored> [disabled]
# ………………省略部分输出信息………………

# 将00:1f.3设备配置空间的0x3c地址值修改为0xc
[DPTECH-Developer-Shell]setpci -s 00:1f.3 3c.B=c
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路虽远行则将至、事虽难做则必成 ☚ MrWang ☛