\" $NetBSD: pcictl.8,v 1.20 2019/11/30 02:47:14 riastradh Exp $
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Dd September 23, 2016
Dt PCICTL 8
Os
Sh NAME
Nm pcictl
Nd a program to manipulate the PCI bus
Sh SYNOPSIS
Nm
Ar pcibus
Ar command
Oo
Ar arg Oo ...
Oc
Oc
Sh DESCRIPTION
Nm
allows a user or system administrator to access various resources
on a PCI bus.
Pp
The following commands are available:
Pp
Cm list
Op Fl Nn
Op Fl b Ar bus
Op Fl d Ar device
Op Fl f Ar function
Pp
List the devices in the PCI domain, either as names or, if
Fl n
is given, as numbers.
The bus, device, and function
numbers may be specified by flags.
Any locator not specified defaults
to a wildcard, or may be explicitly wildcarded by specifying
Dq any .
If
Fl N
is given, the driver name for this PCI device will be listed
if any driver is attached.
Pp
Cm dump
Op Fl b Ar bus
Fl d Ar device
Op Fl f Ar function
Pp
Dump the PCI configuration space for the specified device located
at the specified bus, device, and function.
If the bus is not specified, it defaults to the bus number of the
PCI bus specified on the command line.
If the function is not specified, it defaults to 0.
Pp
Cm read
Op Fl b Ar bus
Fl d Ar device
Op Fl f Ar function
Ar reg
Pp
Read the specified 32-bit aligned PCI configuration register and print
it in hexadecimal to standard output.
If the bus is not specified, it defaults to the bus number of the
PCI bus specified on the command line.
If the function is not specified, it defaults to 0.
Pp
Sy WARNING :
Nm
Cm read
is a dangerous command that can damage hardware and panic the operating
system, even though it appears to be a harmless read-only operation.
It is meant as a diagnostic tool for experiments or to debug device
drivers.
Do not use it as a substitute for a device driver!
Pp
Cm write
Op Fl b Ar bus
Fl d Ar device
Op Fl f Ar function
Ar reg
Ar value
Pp
Write the specified value to the specified 32-bit aligned PCI
configuration register.
If the bus is not specified, it defaults to the bus number of the
PCI bus specified on the command line.
If the function is not specified, it defaults to 0.
Pp
Sy WARNING :
Nm
Cm write
is a dangerous command that can damage hardware and panic the operating
system.
It is meant as a diagnostic tool for experiments or to debug device
drivers.
Do not use it as a substitute for a device driver!
Sh FILES
Pa /dev/pci*
- PCI bus device nodes
Sh EXAMPLES
This shows all PCI devices on the system:
Pp
Dl pcictl pci0 list
Pp
This shows all PCI devices on the system, including attached drivers:
Pp
Dl pcictl pci0 list -N
Sh SEE ALSO
Xr pci 3 ,
Xr pci 4 ,
Xr drvctl 8
Sh HISTORY
The
Nm
command first appeared in
Nx 1.6 .
