[PCIe] lspci command and the PCIe devices in my server

The following content is about my PCIe devices/drivers and the lspci command results.

$ cd /sys/bus/pci_express/drivers

$ ls -al

drwxr-xr-x 2 root root 0  7月  6 15:33 aer/

drwxr-xr-x 2 root root 0  7月  6 15:33 pciehp/

drwxr-xr-x 2 root root 0  7月  6 15:33 pcie_pme/

$ cd  pcie_pme

$ ls -al

$ lspci | grep 00:1c

Or

$ cd /sys/bus/pci_express/devices

$ ls -al

$ cd 0000:00:1c.0:pcie01

$ ls -al

total 0

drwxr-xr-x 3 root root    0  7月  5 08:56 ./

drwxr-xr-x 6 root root    0  7月  5 08:56 ../

lrwxrwxrwx 1 root root    0  7月  6 15:51 driver -> ../../../../bus/pci_express/drivers/pcie_pme/

drwxr-xr-x 2 root root    0  7月  6 15:51 power/

lrwxrwxrwx 1 root root    0  7月  6 15:51 subsystem -> ../../../../bus/pci_express/

-rw-r--r-- 1 root root 4096  7月  5 08:56 uevent

$ cd /proc/driver/nvidia

$ ll

total 0

dr-xr-xr-x  5 root root 0  7月  6 15:58 ./

dr-xr-xr-x  4 root root 0  7月  6 15:58 ../

dr-xr-xr-x 10 root root 0  7月  6 15:58 gpus/

-r--r--r--  1 root root 0  7月  6 15:58 params

dr-xr-xr-x  2 root root 0  7月  6 15:58 patches/

-rw-r--r--  1 root root 0  7月  6 15:58 registry

-r--r--r--  1 root root 0  7月  6 15:58 version

dr-xr-xr-x  2 root root 0  7月  6 15:58 warnings/

ubuntu@ubuntu-desktop:/proc/driver/nvidia$ cd gpus/

ubuntu@ubuntu-desktop:/proc/driver/nvidia/gpus$ ll

total 0

dr-xr-xr-x 10 root root 0  7月  6 15:58 ./

dr-xr-xr-x  5 root root 0  7月  6 15:58 ../

dr-xr-xr-x  2 root root 0  7月  6 15:58 0000:04:00.0/

dr-xr-xr-x  2 root root 0  7月  6 15:58 0000:05:00.0/

dr-xr-xr-x  2 root root 0  7月  6 15:58 0000:08:00.0/

dr-xr-xr-x  2 root root 0  7月  6 15:58 0000:09:00.0/

dr-xr-xr-x  2 root root 0  7月  6 15:58 0000:83:00.0/

dr-xr-xr-x  2 root root 0  7月  6 15:58 0000:84:00.0/

dr-xr-xr-x  2 root root 0  7月  6 15:58 0000:87:00.0/

dr-xr-xr-x  2 root root 0  7月  6 15:58 0000:88:00.0/

$ cd 0000\:04\:00.0/

$ ll

total 0

dr-xr-xr-x  2 root root 0  7月  6 15:58 ./

dr-xr-xr-x 10 root root 0  7月  6 15:58 ../

-r--r--r--  1 root root 0  7月  6 15:58 information

-rw-r--r--  1 root root 0  7月  6 15:58 registry

$ hexdump -C registry

00000000  42 69 6e 61 72 79 3a 20  22 22 0a                 |Binary: "".|

0000000b

$ lspci -vvvxxxx -s 02:00.0

02:00.0 PCI bridge: PLX Technology, Inc. PEX 8747 48-Lane, 5-Port PCI Express Gen 3 (8.0 GT/s) Switch (rev ca) (prog-if 00 [Normal decode])

       Physical Slot: 0

       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: 32 bytes

       Region 0: Memory at c5100000 (32-bit, non-prefetchable) [size=256K]

       Bus: primary=02, secondary=03, subordinate=05, sec-latency=0

       I/O behind bridge: 00003000-00004fff

       Memory behind bridge: c2000000-c50fffff

       Prefetchable memory behind bridge: 000002ffb0000000-000002ffe1ffffff

       Secondary status: 66MHz- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- <SERR- <PERR-

       BridgeCtl: Parity- SERR+ NoISA- VGA- MAbort- >Reset- FastB2B-

               PriDiscTmr- SecDiscTmr- DiscTmrStat- DiscTmrSERREn-

       Capabilities: <access denied>

       Kernel driver in use: pcieport

00: b5 10 47 87 07 05 10 00 ca 00 04 06 08 00 01 00

10: 00 00 10 c5 00 00 00 00 02 03 05 00 31 41 00 00

20: 00 c2 00 c5 01 b0 f1 e1 ff 02 00 00 ff 02 00 00

30: 00 00 00 00 40 00 00 00 00 00 00 00 0b 01 12 00