1 files changed, 40 insertions, 1 deletions

diff --git a/Documentation/ABI/testing/sysfs-bus-fcoe b/Documentation/ABI/testing/sysfs-bus-fcoe
index 971dc22e6c2a..21640eaad371 100644
--- a/Documentation/ABI/testing/sysfs-bus-fcoe
+++ b/Documentation/ABI/testing/sysfs-bus-fcoe
@@ -1,14 +1,53 @@
+What:           /sys/bus/fcoe/
+Date:           August 2012
+KernelVersion:  TBD
+Contact:        Robert Love <robert.w.love@intel.com>, devel@open-fcoe.org
+Description:    The FCoE bus. Attributes in this directory are control interfaces.
+Attributes:
+
+        ctlr_create: 'FCoE Controller' instance creation interface. Writing an
+                     <ifname> to this file will allocate and populate sysfs with a
+                     fcoe_ctlr_device (ctlr_X). The user can then configure any
+                     per-port settings and finally write to the fcoe_ctlr_device's
+                     'start' attribute to begin the kernel's discovery and login
+                     process.
+
+        ctlr_destroy: 'FCoE Controller' instance removal interface. Writing a
+                       fcoe_ctlr_device's sysfs name to this file will log the
+                       fcoe_ctlr_device out of the fabric or otherwise connected
+                       FCoE devices. It will also free all kernel memory allocated
+                       for this fcoe_ctlr_device and any structures associated
+                       with it, this includes the scsi_host.
+
 What:           /sys/bus/fcoe/devices/ctlr_X
 Date:           March 2012
 KernelVersion:  TBD
 Contact:        Robert Love <robert.w.love@intel.com>, devel@open-fcoe.org
-Description:    'FCoE Controller' instances on the fcoe bus
+Description:    'FCoE Controller' instances on the fcoe bus.
+                The FCoE Controller now has a three stage creation process.
+                1) Write interface name to ctlr_create 2) Configure the FCoE
+                Controller (ctlr_X) 3) Enable the FCoE Controller to begin
+                discovery and login. The FCoE Controller is destroyed by
+                writing it's name, i.e. ctlr_X to the ctlr_delete file.
+
 Attributes:
 
         fcf_dev_loss_tmo: Device loss timeout peroid (see below). Changing
                           this value will change the dev_loss_tmo for all
                           FCFs discovered by this controller.
 
+        mode:             Display or change the FCoE Controller's mode. Possible
+                          modes are 'Fabric' and 'VN2VN'. If a FCoE Controller
+                          is started in 'Fabric' mode then FIP FCF discovery is
+                          initiated and ultimately a fabric login is attempted.
+                          If a FCoE Controller is started in 'VN2VN' mode then
+                          FIP VN2VN discovery and login is performed. A FCoE
+                          Controller only supports one mode at a time.
+
+        enabled:          Whether an FCoE controller is enabled or disabled.
+                          0 if disabled, 1 if enabled. Writing either 0 or 1
+                          to this file will enable or disable the FCoE controller.
+
         lesb/link_fail:   Link Error Status Block (LESB) link failure count.
 
         lesb/vlink_fail:  Link Error Status Block (LESB) virtual link