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.\" SPDX-License-Identifier: BSD-2-Clause
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.\" Copyright (c) 2002 Hiten Pandya
.\" Copyright (c) 2002 Robert N. M. Watson
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.Dd March 6, 2026
.Dt DEVINFO 8
.Os
.Sh NAME
.Nm devinfo
.Nd print information about system device configuration
.Sh SYNOPSIS
.Nm
.Op Fl rv
.Nm
.Fl p Ar dev Op Fl v
.Nm
.Fl u Op Fl v
.Sh DESCRIPTION
The
.Nm
utility, without any arguments, shows the hierarchy of devices available
in the system, starting from the
.Dq nexus
device.
.Pp
The following options are accepted:
.Bl -tag -width indent
.It Fl p Ar dev
Display the path of
.Ar dev
back to the root of the device tree.
.Ar dev
can either be a device name,
the absolute path of an ACPI handle
.Po must begin with a
.Dq \e
.Pc ,
or a PCI selector
.Po
either
.Sy pci Ns Fa domain Ns : Ns Fa bus Ns : Ns Fa slot Ns : Ns Fa function
or
.Sy pci Ns Fa bus Ns : Ns Fa slot Ns : Ns Fa function
.Pc .
.Pp
If
.Fl v
is specified,
each device is output on a separate line including the device name and
additional verbose information;
otherwise, a space-separated list of device names is output.
.It Fl r
Causes hardware resource information
.Pq such as IRQ, I/O ports, I/O memory addresses
to be also listed, under each device that has reserved those resources.
.It Fl u
Displays the same information as with
.Fl r
but sorts by resource type rather than by device, allowing to review the
set of system resources by usage and available resources.
I.e., it lists all
the IRQ consumers together.
.It Fl v
Display all devices in the driver tree, not just those that are attached or
busy.
Without this flag, only those devices that have attached are reported.
This flag also displays verbose information about each device.
.El
.Sh SEE ALSO
.Xr systat 1 ,
.Xr devinfo 3 ,
.Xr devctl 8 ,
.Xr iostat 8 ,
.Xr pciconf 8 ,
.Xr vmstat 8 ,
.Xr devclass 9 ,
.Xr device 9
.Sh HISTORY
The
.Nm
utility appeared in
.Fx 5.0 .
.Sh AUTHORS
.An Mike Smith Aq Mt msmith@FreeBSD.org