doc: add basic guide for pmdinfo

This summarizes the "how to call dpdk-pmdinfo" in one place to be picked
up by html/pdf/man-page docs.

Signed-off-by: Christian Ehrhardt <christian.ehrhardt@canonical.com>
Acked-by: Luca Boccassi <lboccass@brocade.com>
Acked-by: John McNamara <john.mcnamara@intel.com>

MAINTAINERS

@@ -75,6 +75,7 @@ F: scripts/validate-abi.sh
 Driver information
 F: buildtools/pmdinfogen/
 F: tools/dpdk-pmdinfo.py
+F: doc/guides/tools/pmdinfo.rst
 
 
 Environment Abstraction Layer

doc/guides/conf.py

@@ -111,7 +111,9 @@ def __init__(self, **options):
              ("tools/pdump", "dpdk-pdump",
               "enable packet capture on dpdk ports", "", 1),
              ("tools/proc_info", "dpdk-procinfo",
-              "access dpdk port stats and memory info", "", 1)]
+              "access dpdk port stats and memory info", "", 1),
+             ("tools/pmdinfo", "dpdk-pmdinfo",
+              "dump a PMDs hardware support info", "", 1)]
 
 ######## :numref: fallback ########
 # The following hook functions add some simple handling for the :numref:

doc/guides/tools/index.rst

@@ -37,4 +37,5 @@ Tool User Guides
 
     proc_info
     pdump
+    pmdinfo
 

doc/guides/tools/pmdinfo.rst

@@ -0,0 +1,55 @@
+..  BSD LICENSE
+    Copyright(c) 2016 Canonical Limited. 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.
+
+
+dpdk-pmdinfo Application
+========================
+
+The ``dpdk-pmdinfo`` tool is a Data Plane Development Kit (DPDK) utility that
+can dump a PMDs hardware support info.
+
+
+Running the Application
+-----------------------
+
+The tool has a number of command line options:
+
+.. code-block:: console
+
+   dpdk-pmdinfo [-hrtp] [-d <pci id file] <elf-file>
+
+   -h, --help            Show a short help message and exit
+   -r, --raw             Dump as raw json strings
+   -d FILE, --pcidb=FILE Specify a pci database to get vendor names from
+   -t, --table           Output information on hw support as a hex table
+   -p, --plugindir       Scan dpdk for autoload plugins
+
+.. Note::
+
+   * Parameters inside the square brackets represents optional parameters.