Differential D15583 Diff 44442 usr.sbin/pciconf/pciconf.8

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usr.sbin/pciconf/pciconf.8

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	.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)			.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT			.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY			.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF			.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	.\" SUCH DAMAGE.			.\" SUCH DAMAGE.
	.\"			.\"
	.\" $FreeBSD$			.\" $FreeBSD$
	.\"			.\"
	.Dd November 23, 2015			.Dd June 14, 2018
	.Dt PCICONF 8			.Dt PCICONF 8
	.Os			.Os
	.Sh NAME			.Sh NAME
	.Nm pciconf			.Nm pciconf
	.Nd diagnostic utility for the PCI bus			.Nd diagnostic utility for the PCI bus
	.Sh SYNOPSIS			.Sh SYNOPSIS
	.Nm			.Nm
	.Fl l Oo Fl BbceVv Oc Op Ar device			.Fl l Oo Fl BbceVv Oc Op Ar device
	.Nm			.Nm
	.Fl a Ar device			.Fl a Ar device
	.Nm			.Nm
	.Fl r Oo Fl b \| h Oc Ar device addr Ns Op : Ns Ar addr2			.Fl r Oo Fl b \| h Oc Ar device addr Ns Op : Ns Ar addr2
	.Nm			.Nm
	.Fl w Oo Fl b \| h Oc Ar device addr value			.Fl w Oo Fl b \| h Oc Ar device addr value
				.Nm
				.Fl D Oo Fl b \| h \| x Oc Ar device addr Op start Ns Op : Ns Ar count
	.Sh DESCRIPTION			.Sh DESCRIPTION
	The			The
	.Nm			.Nm
	utility provides a command line interface to functionality provided by the			utility provides a command line interface to functionality provided by the
	.Xr pci 4			.Xr pci 4
	.Xr ioctl 2			.Xr ioctl 2
	interface.			interface.
	As such, some of the functions are only available to users with write			As such, some of the functions are only available to users with write
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	The			The
	.Fl w			.Fl w
	option writes the			option writes the
	.Ar value			.Ar value
	into a configuration space register at byte offset			into a configuration space register at byte offset
	.Ar addr			.Ar addr
	of device			of device
	.Ar selector .			.Ar selector .
	For both operations, the flags			.Pp
	.Fl b			The
				.Fl D
				option request a dump of the specified BAR.
				Dump is performed to the standard output, raw register values
				are written.
				Use
				.Xr hexdump 1
				to convert them to human-readable dump,
				or redirect into a file to save the snapshot of the device state.
				Optionally, the
				.Ar start
	and			and
	.Fl h			.Ar count
				of the registers dumped can be specified, in multiple of the operation width,
				see next paragraph.
				.Pp
				For read, write, and dump operations, the flags
				.Fl b ,
				.Fl h ,
				and
				.Fl x
	select the width of the operation;			select the width of the operation;
	.Fl b			.Fl b
	indicates a byte operation, and			indicates a byte operation, and
	.Fl h			.Fl h
	indicates a halfword (two-byte) operation.			indicates a halfword (two-byte) operation.
				.Fl x
				indicates a quadword (four-byte) operation.
	The default is to read or			The default is to read or
	write a longword (four bytes).			write a longword (four bytes).
				The quadword mode is only valid for BAR dump.
	.Sh ENVIRONMENT			.Sh ENVIRONMENT
	PCI vendor and device information is read from			PCI vendor and device information is read from
	.Pa /usr/local/share/pciids/pci.ids .			.Pa /usr/local/share/pciids/pci.ids .
	If that file is not present, it is read from			If that file is not present, it is read from
	.Pa /usr/share/misc/pci_vendors .			.Pa /usr/share/misc/pci_vendors .
	This path can be overridden by setting the environment variable			This path can be overridden by setting the environment variable
	.Ev PCICONF_VENDOR_DATABASE .			.Ev PCICONF_VENDOR_DATABASE .
	.Sh SEE ALSO			.Sh SEE ALSO
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	.Fl r			.Fl r
	options.			options.
	But only root will be able to execute a			But only root will be able to execute a
	.Nm kldload			.Nm kldload
	to provide the device with a driver KLD, and reading of configuration space			to provide the device with a driver KLD, and reading of configuration space
	registers may cause a failure in badly designed			registers may cause a failure in badly designed
	.Tn PCI			.Tn PCI
	chips.			chips.
				.Pp
				There is currently no way to specify the caching mode for the mapping
				established by the
				.Fl D
				option,
				.Nm
				always uses uncached access.
				This is fine for control register BARs.