Adding upstream version 1:3.11.1.upstream/1%3.11.1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

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+.TH pci.ids 5 "@TODAY@" "@VERSION@" "The PCI Utilities"
+
+.SH NAME
+pci.ids \- list of known identifiers related to PCI devices
+
+.SH INTRODUCTION
+Devices on the PCI bus are identified by a combination
+of a vendor ID (assigned by the PCI SIG) and device ID
+(assigned by the vendor). Both IDs are 16-bit integers
+and the device itself provides no translation to a human-readable
+string.
+
+In addition to the vendor and device, devices also report several
+other identifiers:
+
+.IP \(bu 3
+Device class and subclass (two 8-bit numbers)
+
+.IP \(bu 3
+Programming interface (8-bit number, meaning specific for the subclass)
+
+.IP \(bu 3
+Subsystem, which identifies the assembly in which the device is contained.
+A typical example is an Ethernet add-in card: the device is the Ethernet
+controller chip, while the card plays the role of the subsystem. Subsystems
+have their vendor ID (from the same namespace as device vendors) and subsystem
+ID. Generally, the meaning of the subsystem ID depends on the device, but there
+are cases in which a single subsystem ID is used for many devices - e.g.,
+laptop motherboards.
+
+The PCI utilities use the
+.B pci.ids
+file to translate all these numeric IDs to strings.
+
+.SH KEEPING THE LIST UP-TO-DATE
+The
+.B pci.ids
+file is generated from the PCI ID database, which is maintained at
+.UR https://pci-ids.ucw.cz/
+.UE .
+If you find any IDs missing from the list, please contribute them
+to the database.
+
+You can use the
+.B update-pciids
+command to download the current version of the list.
+
+Alternatively, you can use
+.B lspci -q
+to query the database online.
+
+.SH FILE FORMAT
+The pci.ids file is a text file in plain ASCII, interpreted line by line.
+Lines starting with the hash sign are treated as comments are ignored.
+Comments regarding a specific entry are written immediately before the entry.
+
+Vendor entries start with a 4-digit hexadecimal vendor ID, followed by one
+or more spaces, and the name of the vendor extending to the end of the line.
+
+Device entries are placed below the vendor entry. Each device entry consists
+of a single TAB character, a 4-digit hexadecimal device ID, followed by one or more
+spaces, and the name of the device extending to the end of the line.
+
+Subsystem entries are placed below the device entry. They start with two TAB
+characters, a 4-digit hexadecimal vendor ID (which must be defined elsewhere in
+the list), a single space, a 4-digit hexadecimal subsystem ID, one or more
+spaces, and the name of the subsystem extending to the end of the line.
+
+Class entries consist of "C", one space, 2-digit hexadecimal class ID, one or
+more spaces, and the name of the class. Subclasses are placed below the
+corresponding class, indented by a single TAB, followed by a 2-digit
+hexadecimal subclass ID, one or more spaces, and the name of the subclass.
+Programming interfaces are below the subclass, indented by two TABs, followed
+by a 2-digit hexadecimal prog-if ID, one or more spaces, and the name.
+
+There can be device-independent subsystem IDs, although the web interface of
+the database does not support them yet. They start with a subsystem vendor line
+consisting of "S", one space, and a 4-digit hexadecimal vendor ID (which must
+correspond to an already listed vendor). Subsystems follow on subsequent lines,
+each indented by one TAB, followed by a 4-digit hexadecimal subsystem ID, one
+or more spaces, and the name of the subsystem.
+
+To ensure extensibility of the format, lines starting with an unrecognized letter
+followed by a single space are ignored and so are all following TAB-indented lines.
+
+.SH FILES
+.TP
+.B @IDSDIR@/@PCI_IDS@
+Location of the list.
+
+.SH SEE ALSO
+.BR lspci (8),
+.BR update-pciids (8),
+.BR pcilib (7)
+
+.SH AUTHOR
+The PCI Utilities are maintained by Martin Mares <mj@ucw.cz>.