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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 - using Fixed and Dynamic Huffman encoding
Window size support:
* 32K
Checksum generation:
* CRC32, Adler and combined checksum
Limitations
-----------
* Compressdev level 0, no compression, is not supported.
* Queue pairs are not thread-safe (that is, within a single queue pair, RX and TX from different lcores is not supported).
* No BSD support as BSD QAT kernel driver not available.
Installation
------------
The QAT compression PMD is built by default with a standard DPDK build.
It depends on a QAT kernel driver, see :ref:`building_qat`.
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