Differences

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--- linux:kernel:pci_devices [2021/01/29 10:47] – peter
+++ linux:kernel:pci_devices [2022/10/08 11:37] (current) – peter
@@ Line 3: / Line 3: @@
 The PCI standard has become the de-facto standard for system buses.
 Linux provide extensive support for PCI, and contains numerous drivers for network, storage and 3rd party adapters.
 ----
@@ Line 83: / Line 83: @@
   * **00**   : The device number.
   * **.0**   : PCI device function.
+Vendor and device information is stored in a centralized [[http://pci-ids.ucw.cz/|PCI ID repository]], so you can figure out what a given device is by decoding the PCI data manually.
 </WRAP>
@@ Line 235: / Line 237: @@
 **NOTE:**  lspci displays the raw PCI identification data.
 </WRAP>
+----
+==== Expand on one device ====
+As an example, taking this from above list:
+<code bash>
+:00.0 0300: 10de:1c82 (rev a1)
+</code>
+<WRAP info>
+**NOTE:**
+  * 09:00.0 : Bus number (09), Device number (00) and Function (0).
+  * 0300    : Device class.
+  * 10de    : Vendor ID.
+  * 1c82    : Device ID.
+Looking up the identifiers in the [[http://pci-ids.ucw.cz/|PCI ID repository]]:
+  * 0300    : Device class => Display controller.
+  * 10de    : Vendor ID => NVIDIA Corporation.
+  * 1c82    : Device ID => GP107 [GeForce GTX 1050 Ti].
+which matches the output from the default **lspci | tail -10**:
+<code bash>
+:00.0 VGA compatible controller: NVIDIA Corporation GP107 [GeForce GTX 1050 Ti] (rev a1)
+</code>
+</WRAP>
+----
+===== Updating the PCI identification list =====
+The lspci utility uses the pci.ids file to determine the vendor and device type.
+This file will grow as new vendors and devices are added, and can be updated automatically by running the update-pciids utility:
+<code bash>
+/sbin/update-pciids
+</code>
+returns:
+<code bash>
+  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
+                                 Dload  Upload   Total   Spent    Left  Speed
+  264k  100  264k    0     0   494k      0 --:--:-- --:--:-- --:--:--  493k
+</code>
+----
+===== References =====
+http://pci-ids.ucw.cz/
+http://www.pcisig.com/home