[dpdk-dev,v6,2/2] doc: add user-space ethtool sample app guide

diff --git a/doc/guides/rel_notes/release_2_2.rst b/doc/guides/rel_notes/release_2_2.rst
index 59dda59..bafebb3 100644
--- a/doc/guides/rel_notes/release_2_2.rst
+++ b/doc/guides/rel_notes/release_2_2.rst
@@ -187,6 +187,7 @@  Libraries
 Examples
 ~~~~~~~~
 
+* **ethtool: Added ethtool shim and sample application.**
 
 Other
 ~~~~~
diff --git a/doc/guides/sample_app_ug/ethtool.rst b/doc/guides/sample_app_ug/ethtool.rst
new file mode 100644
index 0000000..36d8dfc
--- /dev/null
+++ b/doc/guides/sample_app_ug/ethtool.rst
@@ -0,0 +1,173 @@ 
+
+..  BSD LICENSE
+    Copyright(c) 2015 Intel Corporation. All rights reserved.
+    All rights reserved.
+
+    Redistribution and use in source and binary forms, with or without
+    modification, are permitted provided that the following conditions
+    are met:
+
+    * Redistributions of source code must retain the above copyright
+    notice, this list of conditions and the following disclaimer.
+    * Redistributions in binary form must reproduce the above copyright
+    notice, this list of conditions and the following disclaimer in
+    the documentation and/or other materials provided with the
+    distribution.
+    * Neither the name of Intel Corporation nor the names of its
+    contributors may be used to endorse or promote products derived
+    from this software without specific prior written permission.
+
+    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+    "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+    LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+    A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+    OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+    SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+    LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+    DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+    THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+    (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+    OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+EthTool Sample Application
+==========================
+
+The Ethtool sample application shows an implementation of an
+EthTool-like API and provides a console environment that allows
+its use to query and change Ethernet card parameters. The sample
+is based upon a simple L2 frame reflector.
+
+Compiling the Application
+-------------------------
+
+To compile the application:
+
+#.  Go to the sample application directory:
+
+    .. code-block:: console
+
+        export RTE_SDK=/path/to/rte_sdk cd ${RTE_SD}/examples/ethtool
+
+#.  Set the target (a default target is used if not specified). For example:
+
+    .. code-block:: console
+
+        export RTE_TARGET=x86_64-native-linuxapp-gcc
+
+    See the *DPDK Getting Started Guide* for possible RTE_TARGET values.
+
+#.  Build the application:
+
+    .. code-block:: console
+
+        make
+
+Running the Application
+-----------------------
+
+The application requires an available core for each port, plus one.
+The only available options are the standard ones for the EAL:
+
+.. code-block:: console
+
+    ./ethtool-app/ethtool-app/${RTE_TARGET}/ethtool [EAL options]
+
+Refer to the *DPDK Getting Started Guide* for general information on
+running applications and the Environment Abstraction Layer (EAL)
+options.
+
+Using the application
+---------------------
+
+The application is console-driven using the cmdline DPDK interface:
+
+.. code-block:: console
+
+        EthApp>
+
+From this interface the available commands and descriptions of what
+they do as as follows:
+
+drvinfo
+        Print driver info
+eeprom
+        Dump EEPROM to file
+link
+        Print port link states
+macaddr
+        Gets/sets MAC address
+mtu
+        Set NIC MTU
+open
+        Open port
+pause
+        Get/set port pause state
+portstats
+        Print port statistics
+regs
+        Dump port register(s) to file
+ringparam
+        Get/set ring parameters
+rxmode
+        Toggle port Rx mode
+stop
+        Stop port
+validate
+        Check that given MAC address is valid unicast address
+vlan
+        Add/remove VLAN id
+quit
+        Exit program
+
+Explaination
+------------
+
+The sample program has two parts: A background `packet reflector`_
+that runs on a slave core, and a foreground `EthTool Shell`_ that
+runs on the master core. These are described below.
+
+Packet Reflector
+~~~~~~~~~~~~~~~~
+
+The background packet reflector is intended to demonstrate basic
+packet processing on NIC ports controlled by the EthTool shim.
+Each incoming MAC frame is rewritten so that it is returned to
+the sender, using the port in question's own MAC address as the
+source address, and is then sent out on the same port.
+
+EthTool Shell
+~~~~~~~~~~~~~
+
+The foreground part of the EthTool sample is a console-based
+interface that accepts commands as described in `using the
+application`_. Individual call-back functions handle the detail
+associated with each command, which make use of the functions
+defined in the `EthTool interface`_ to the DPDK functions.
+
+EthTool interface
+-----------------
+
+The EthTool interface is built as a separate library, and implements
+the following functions:
+
+- rte_ethtool_get_drvinfo
+- rte_ethtool_get_regs_len
+- rte_ethtool_get_regs
+- rte_ethtool_get_link
+- rte_ethtool_get_eeprom_len
+- rte_ethtool_get_eeprom
+- rte_ethtool_set_eeprom
+- rte_ethtool_get_pauseparam
+- rte_ethtool_set_pauseparam
+- rte_ethtool_net_open
+- rte_ethtool_net_stop
+- rte_ethtool_net_get_mac_addr
+- rte_ethtool_net_set_mac_addr
+- rte_ethtool_net_validate_addr
+- rte_ethtool_net_change_mtu
+- rte_ethtool_net_get_stats64
+- rte_ethtool_net_vlan_rx_add_vid
+- rte_ethtool_net_vlan_rx_kill_vid
+- rte_ethtool_net_set_rx_mode
+- rte_ethtool_get_ringparam
+- rte_ethtool_set_ringparam
diff --git a/doc/guides/sample_app_ug/index.rst b/doc/guides/sample_app_ug/index.rst
index 9beedd9..086d3f2 100644
--- a/doc/guides/sample_app_ug/index.rst
+++ b/doc/guides/sample_app_ug/index.rst
@@ -41,6 +41,7 @@  Sample Applications User Guide
 
     intro
     cmd_line
+    ethtool
     exception_path
     hello_world
     skeleton