[dpdk-dev] [PATCH v1 6/6] doc: add ZLIB PMD documentation

[Shally Verma <shally.verma@caviumnetworks.com>]

add zlib pmd feature specification and overview documentation

Signed-off-by: Sunila Sahu <sunila.sahu@caviumnetworks.com>
Signed-off-by: Shally Verma <shally.verma@caviumnetworks.com>
Signed-off-by: Ashish Gupta <ashish.gupta@caviumnetworks.com>
---
 doc/guides/compressdevs/features/zlib.ini | 22 ++++++++++
 doc/guides/compressdevs/zlib.rst          | 72 +++++++++++++++++++++++++++++++
 2 files changed, 94 insertions(+)

diff --git a/doc/guides/compressdevs/features/zlib.ini b/doc/guides/compressdevs/features/zlib.ini
new file mode 100644
index 0000000..10e758b
--- /dev/null
+++ b/doc/guides/compressdevs/features/zlib.ini
@@ -0,0 +1,22 @@
+;
+; Refer to default.ini for the full list of available PMD features.
+;
+; Supported features of 'ZLIB' compression driver.
+;
+[Features]
+HW Accelerated =
+CPU SSE        =
+CPU AVX        =
+CPU AVX2       =
+CPU AVX512     =
+CPU NEON       =
+Stateful       =
+By-Pass        =
+Chained mbufs  =
+Deflate        = Y
+LZS            =
+Adler32        = Y
+Crc32          = Y
+Adler32&Crc32  =
+Fixed          = Y
+Dynamic        = Y
diff --git a/doc/guides/compressdevs/zlib.rst b/doc/guides/compressdevs/zlib.rst
new file mode 100644
index 0000000..130750b
--- /dev/null
+++ b/doc/guides/compressdevs/zlib.rst
@@ -0,0 +1,72 @@
+..  SPDX-License-Identifier: BSD-3-Clause
+    Copyright(c) 2018 Cavium Networks.
+
+ZLIB Compression Poll Mode Driver
+==================================
+
+The ZLIB PMD (**librte_pmd_zlib**) provides poll mode compression &
+decompression driver based on SW zlib library,
+
+Features
+--------
+
+ZLIB PMD has support for:
+
+Compression/Decompression algorithm:
+
+* DEFLATE
+
+Huffman code type:
+
+* FIXED
+* DYNAMIC
+
+Checksum support:
+
+* Adler32
+* CRC32
+
+Window size support:
+
+* 32K
+
+Limitations
+-----------
+
+* Chained mbufs are not supported.
+
+Installation
+------------
+
+* To build DPDK with ZLIB library, the user is required to download the ``libz`` library.
+* Use following command for installation.
+
+*  For Fedora users ::
+  yum install zlib-devel
+*  For ubuntu users ::
+  apt-get install zlib1g-dev
+
+* Once downloaded, the user needs to build the library.
+
+* make can  be used to install the library on their system, before building DPDK::
+
+    make
+    sudo make install
+
+Initialization
+--------------
+
+In order to enable this virtual compression PMD, user must:
+
+* Set ``CONFIG_RTE_LIBRTE_PMD_ZLIB=y`` in config/common_base.
+
+To use the PMD in an application, user must:
+
+* Call ``rte_vdev_init("compress_zlib")`` within the application.
+
+* Use ``--vdev="compress_zlib"`` in the EAL options, which will call ``rte_vdev_init()`` internally.
+
+The following parameter (optional) can be provided in the previous two calls:
+
+* ``socket_id:`` Specify the socket where the memory for the device is going to be allocated
+  (by default, socket_id will be the socket where the core that is creating the PMD is running on).
-- 
2.9.5