[S390] cio: Introduce modalias for css bus.

Add modalias and subchannel type attributes for all subchannels.
I/O subchannel specific attributes are now created in
io_subchannel_probe(). modalias and subchannel type are also
added to the uevent for the css bus. Also make the css modalias
known.

Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>

1 files changed, 35 insertions, 0 deletions

diff --git a/Documentation/ABI/testing/sysfs-bus-css b/Documentation/ABI/testing/sysfs-bus-css
new file mode 100644
index 000000000000..b585ec258a08
--- /dev/null
+++ b/Documentation/ABI/testing/sysfs-bus-css
@@ -0,0 +1,35 @@
+What:           /sys/bus/css/devices/.../type
+Date:           March 2008
+Contact:        Cornelia Huck <cornelia.huck@de.ibm.com>
+                linux-s390@vger.kernel.org
+Description:    Contains the subchannel type, as reported by the hardware.
+                This attribute is present for all subchannel types.
+
+What:           /sys/bus/css/devices/.../modalias
+Date:           March 2008
+Contact:        Cornelia Huck <cornelia.huck@de.ibm.com>
+                linux-s390@vger.kernel.org
+Description:    Contains the module alias as reported with uevents.
+                It is of the format css:t<type> and present for all
+                subchannel types.
+
+What:           /sys/bus/css/drivers/io_subchannel/.../chpids
+Date:           December 2002
+Contact:        Cornelia Huck <cornelia.huck@de.ibm.com>
+                linux-s390@vger.kernel.org
+Description:    Contains the ids of the channel paths used by this
+                subchannel, as reported by the channel subsystem
+                during subchannel recognition.
+                Note: This is an I/O-subchannel specific attribute.
+Users:          s390-tools, HAL
+
+What:           /sys/bus/css/drivers/io_subchannel/.../pimpampom
+Date:           December 2002
+Contact:        Cornelia Huck <cornelia.huck@de.ibm.com>
+                linux-s390@vger.kernel.org
+Description:    Contains the PIM/PAM/POM values, as reported by the
+                channel subsystem when last queried by the common I/O
+                layer (this implies that this attribute is not neccessarily
+                in sync with the values current in the channel subsystem).
+                Note: This is an I/O-subchannel specific attribute.
+Users:          s390-tools, HAL