Conventional PCI, often shortened to PCI, is a local computer bus for attaching hardware devices in a computer. PCI is the initialism for Peripheral Component Interconnect[2] and is part of the PCI Local Bus standard. The PCI bus supports the functions found on a processor bus but in a standardized format that is independent of any particular processor's native bus. Devices connected to the PCI bus appear to a bus master to be connected directly to its own bus and are assigned addresses in the processor's address space. It is a parallel bus, synchronous to a single bus clock. Wikipedia
Copy root@edison:~# dmesg | grep -i pci
[ 0.000000 ] e820: [mem 0x40000000 -0xfebfffff] available for PCI devices
[ 0.191609 ] PCI: MMCONFIG for domain 0000 [bus 00 -00] at [mem 0x3f500000 -0x3f5fffff] (base 0x3f500000 )
[ 0.191633 ] PCI: MMCONFIG at [mem 0x3f500000 -0x3f5fffff] reserved in E820
[ 0.191647 ] PCI: Using MMCONFIG for extended config space
[ 0.191660 ] PCI: Using configuration type 1 for base access
[ 0.214309 ] Intel MID platform detected, using MID PCI ops
[ 0.214322 ] PCI: Probing PCI hardware
[ 0.214337 ] PCI: root bus 00 : using default resources
[ 0.214352 ] PCI: Probing PCI hardware (bus 00 )
[ 0.214615 ] PCI host bridge to bus 0000 :00
...
lspci
A command on Unix-like operating systems that prints ("lists") detailed information about all PCI buses and devices in the system. It is based on a common portable library libpci which offers access to the PCI configuration space on a variety of operating systems.
Copy root@edison:~# lspci
00:00.0 Host bridge: Intel Corporation Device 1170 (rev 01 )
00:01.0 SD Host controller: Intel Corporation Device 1190 (rev 01 )
00:01.2 SD Host controller: Intel Corporation Device 1190 (rev 01 )
00:01.3 SD Host controller: Intel Corporation Device 1190 (rev 01 )
00:02.0 Display controller: Intel Corporation Device 1182 (rev 01 )
00:04.0 Serial controller: Intel Corporation Device 1191 (rev 01 )
00:04.1 Serial controller: Intel Corporation Device 1191 (rev 01 )
00:04.2 Serial controller: Intel Corporation Device 1191 (rev 01 )
00:04.3 Serial controller: Intel Corporation Device 1191 (rev 01 )
00:05.0 Serial controller: Intel Corporation Device 1192 (rev 01 )
00:06.0 System peripheral: Intel Corporation Device 1193 (rev 01 )
00:06.1 System peripheral: Intel Corporation Device 1193 (rev 01 )
00:07.0 System peripheral: Intel Corporation Device 1194 (rev 01 )
00:07.1 System peripheral: Intel Corporation Device 1194 (rev 01 )
00:07.2 System peripheral: Intel Corporation Device 1194 (rev 01 )
00:08.0 Communication controller: Intel Corporation Device 1195 (rev 01 )
00:08.1 Communication controller: Intel Corporation Device 1195 (rev 01 )
00:08.2 Communication controller: Intel Corporation Device 1195 (rev 01 )
00:08.3 Communication controller: Intel Corporation Device 1195 (rev 01 )
00:09.0 Communication controller: Intel Corporation Device 1196 (rev 01 )
00:09.1 Communication controller: Intel Corporation Device 1196 (rev 01 )
00:09.2 Communication controller: Intel Corporation Device 1196 (rev 01 )
00:0a.0 Communication controller: Intel Corporation Device 1197 (rev 01 )
00:0b.0 Encryption controller: Intel Corporation Device 1198 (rev 01 )
00:0c.0 System peripheral: Intel Corporation Device 1199 (rev 01 )
00:0d.0 Multimedia audio controller: Intel Corporation Device 119 a (rev 01 )
00:0e.0 System peripheral: Intel Corporation Device 119 b (rev 01 )
00:11.0 USB controller: Intel Corporation Device 119 e (rev 01 )
00:12.0 Signal processing controller: Intel Corporation Device 119 f (rev 01 )
00:13.0 Co-processor: Intel Corporation Device 11 a0 (rev 01 )
00:14.0 Co-processor: Intel Corporation Device 11 a1 (rev 01 )
00:15.0 System peripheral: Intel Corporation Device 11 a2 (rev 01 )
00:16.0 Co-processor: Intel Corporation Device 11 a3 (rev 01 )
00:16.1 Co-processor: Intel Corporation Device 11 a4 (rev 01 )
00:17.0 System peripheral: Intel Corporation Device 11 a5 (rev 01 )
00:18.0 Display controller: Intel Corporation Device 11 a6 (rev 01 )
root@ubilinux:~# cat /proc/bus/pci/devices