New upstream version 18.08

[deb_dpdk.git] / doc / guides / compressdevs / qat_comp.rst

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+..  SPDX-License-Identifier: BSD-3-Clause
+    Copyright(c) 2018 Intel Corporation.
+
+Intel(R) QuickAssist (QAT) Compression Poll Mode Driver
+=======================================================
+
+The QAT compression PMD provides poll mode compression & decompression driver
+support for the following hardware accelerator devices:
+
+* ``Intel QuickAssist Technology C62x``
+* ``Intel QuickAssist Technology C3xxx``
+
+
+Features
+--------
+
+QAT compression PMD has support for:
+
+Compression/Decompression algorithm:
+
+    * DEFLATE
+
+Huffman code type:
+
+    * FIXED
+
+Window size support:
+
+    * 32K
+
+Checksum generation:
+
+    * CRC32, Adler and combined checksum
+
+Limitations
+-----------
+
+* Compressdev level 0, no compression, is not supported.
+
+* Dynamic Huffman encoding is not yet supported.
+
+Installation
+------------
+
+The QAT compression PMD is built by default with a standard DPDK build.
+
+It depends on a QAT kernel driver, see :ref:`qat_kernel_installation`.