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pci(4): Document PCIOCATTACHED

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Document the PCIOCATTACHED ioctl(2) in the pci(4) manual.
PCIOCATTACHED is used to query if a driver has attached to a PCI.

Reviewed by:	bcr, imp
MFC after:	2 weeks
Differential Revision:	https://reviews.freebsd.org/D20652
This commit is contained in:
Niclas Zeising 2019-06-17 05:41:47 +00:00
parent 2c6c030ce2
commit 65d328a3eb
1 changed files with 21 additions and 1 deletions
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22
share/man/man4/pci.4
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@ -24,7 +24,7 @@
.\" .\"
.\" $FreeBSD$ .\" $FreeBSD$
.\" .\"
.Dd June 14, 2018 .Dd June 17, 2019
.Dt PCI 4 .Dt PCI 4
.Os .Os
.Sh NAME .Sh NAME
@ -333,6 +333,26 @@ The limitations on data width described for
reading registers, above, also apply to writing reading registers, above, also apply to writing
.Tn PCI .Tn PCI
configuration registers. configuration registers.
.It PCIOCATTACHED
This
.Xr ioctl 2
allows users to query if a driver is attached to the
.Tn PCI
specified in the passed-in
.Va pci_io
structure.
The
.Va pci_io
structure is described above, however, the
.Va pi_reg
and
.Va pi_width
fields are not used.
The status of the device is stored in the
.Va pi_data
field.
A value of 0 indicates no driver is attached, while a value larger than 0
indicates that a driver is attached.
.It PCIOCBARMMAP .It PCIOCBARMMAP
This This
.Xr ioctl 2 .Xr ioctl 2