Differences

This shows you the differences between two versions of the page.

--- linux:system:pcibus:pcibus [2025/09/20 15:38] – [Understand PCI Bus Structure] oscar
+++ linux:system:pcibus:pcibus [2025/09/20 15:56] (current) – [Query via lspci] oscar
@@ Line 47: / Line 47: @@
   * Unordered List Item02:00.0 Non-Volatile memory controller: Micron Technology Inc 2200S NVMe SSD
-===== sysfs PCI support =====
+===== Query via sysfs =====
 The Linux kernel represents PCI devices as pseudo-devices in the sysfs file system. Linux lists these devices in **///sys/bus/pci/devices//**.
 <code>
@@ Line 72: / Line 72: @@
 lrwxrwxrwx 1 root root 0 20 sep 13:53 0000:02:00.0 -> ../../../devices/pci0000:00/0000:00:1d.0/0000:02:00.0
 </code>
+===== Query via lspci =====
+<code>
+# lspci -n
+:00.0 0600: 8086:3ec2 (rev 07)
+:02.0 0300: 8086:3e92
+:08.0 0880: 8086:1911
+:12.0 1180: 8086:a379 (rev 10)
+:14.0 0c03: 8086:a36d (rev 10)
+:14.2 0500: 8086:a36f (rev 10)
+:16.0 0780: 8086:a360 (rev 10)
+:17.0 0106: 8086:a352 (rev 10)
+:1c.0 0604: 8086:a33c (rev f0)
+:1d.0 0604: 8086:a330 (rev f0)
+:1f.0 0601: 8086:a304 (rev 10)
+:1f.3 0403: 8086:a348 (rev 10)
+:1f.4 0c05: 8086:a323 (rev 10)
+:1f.5 0c80: 8086:a324 (rev 10)
+:00.0 0200: 10ec:8168 (rev 15)
+:00.0 0108: 1344:5410 (rev 01)
+</code>
+We can break each line down like this:
+  * Field 1 : 02:00.0 : bus number (02), device number (00) and function (0)
+  * Field 2 : 0108    : device class
+  * Field 3 : 1344    : vendor ID
+  * Field 4 : 5410    : device ID