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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 @@
.\"
.\" $FreeBSD$
.\"
.Dd June 14, 2018
.Dd June 17, 2019
.Dt PCI 4
.Os
.Sh NAME
@ -333,6 +333,26 @@ The limitations on data width described for
reading registers, above, also apply to writing
.Tn PCI
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
This
.Xr ioctl 2