svn commit: r349133 - head/share/man/man4

[Niclas Zeising]

Author: zeising (doc,ports committer)
Date: Mon Jun 17 05:41:47 2019
New Revision: 349133
URL: https://svnweb.freebsd.org/changeset/base/349133

Log:
  pci(4): Document PCIOCATTACHED
  
  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

Modified:
  head/share/man/man4/pci.4

Modified: head/share/man/man4/pci.4
==============================================================================
--- head/share/man/man4/pci.4	Mon Jun 17 03:48:44 2019	(r349132)
+++ head/share/man/man4/pci.4	Mon Jun 17 05:41:47 2019	(r349133)
@@ -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