1 files changed, 40 insertions, 0 deletions

diff --git a/Documentation/ABI/testing/sysfs-bus-pci b/Documentation/ABI/testing/sysfs-bus-pci
index 25be3250f7d..428676cfa61 100644
--- a/Documentation/ABI/testing/sysfs-bus-pci
+++ b/Documentation/ABI/testing/sysfs-bus-pci
@@ -133,6 +133,46 @@ Description:
                 The symbolic link points to the PCI device sysfs entry of the
                 Physical Function this device associates with.
 
+
+What:           /sys/bus/pci/slots/...
+Date:           April 2005 (possibly older)
+KernelVersion:  2.6.12 (possibly older)
+Contact:        linux-pci@vger.kernel.org
+Description:
+                When the appropriate driver is loaded, it will create a
+                directory per claimed physical PCI slot in
+                /sys/bus/pci/slots/.  The names of these directories are
+                specific to the driver, which in turn, are specific to the
+                platform, but in general, should match the label on the
+                machine's physical chassis.
+
+                The drivers that can create slot directories include the
+                PCI hotplug drivers, and as of 2.6.27, the pci_slot driver.
+
+                The slot directories contain, at a minimum, a file named
+                'address' which contains the PCI bus:device:function tuple.
+                Other files may appear as well, but are specific to the
+                driver.
+
+What:           /sys/bus/pci/slots/.../function[0-7]
+Date:           March 2010
+KernelVersion:  2.6.35
+Contact:        linux-pci@vger.kernel.org
+Description:
+                If PCI slot directories (as described above) are created,
+                and the physical slot is actually populated with a device,
+                symbolic links in the slot directory pointing to the
+                device's PCI functions are created as well.
+
+What:           /sys/bus/pci/devices/.../slot
+Date:           March 2010
+KernelVersion:  2.6.35
+Contact:        linux-pci@vger.kernel.org
+Description:
+                If PCI slot directories (as described above) are created,
+                a symbolic link pointing to the slot directory will be
+                created as well.
+
 What:           /sys/bus/pci/slots/.../module
 Date:           June 2009
 Contact:        linux-pci@vger.kernel.org