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AESN-NI Multi Buffer Crytpo Poll Mode Driver
============================================


The AESNI MB PMD (**librte_pmd_aesni_mb**) provides poll mode crypto driver
support for utilizing Intel multi buffer library, see the white paper
`Fast Multi-buffer IPsec Implementations on Intel® Architecture Processors
<https://www-ssl.intel.com/content/www/us/en/intelligent-systems/intel-technology/fast-multi-buffer-ipsec-implementations-ia-processors-paper.html?wapkw=multi+buffer>`_.

The AES-NI MB PMD has current only been tested on Fedora 21 64-bit with gcc.

Features
--------

AESNI MB PMD has support for:

Cipher algorithms:

* RTE_CRYPTO_SYM_CIPHER_AES128_CBC
* RTE_CRYPTO_SYM_CIPHER_AES256_CBC
* RTE_CRYPTO_SYM_CIPHER_AES512_CBC

Hash algorithms:

* RTE_CRYPTO_SYM_HASH_SHA1_HMAC
* RTE_CRYPTO_SYM_HASH_SHA256_HMAC
* RTE_CRYPTO_SYM_HASH_SHA512_HMAC

Limitations
-----------

* Chained mbufs are not supported.
* Hash only is not supported.
* Cipher only is not supported.
* Only in-place is currently supported (destination address is the same as source address).
* Only supports session-oriented API implementation (session-less APIs are not supported).
*  Not performance tuned.

Installation
------------

To build DPDK with the AESNI_MB_PMD the user is required to download the mult-
buffer library from `here <https://downloadcenter.intel.com/download/22972>`_
and compile it on their user system before building DPDK. When building the
multi-buffer library it is necessary to have YASM package installed and also
requires the overriding of YASM path when building, as a path is hard coded in
the Makefile of the release package.

.. code-block:: console

	make YASM=/usr/bin/yasm

The environmental variable
AESNI_MULTI_BUFFER_LIB_PATH must be exported with the path where you extracted
and built the multi buffer library and finally set
CONFIG_RTE_LIBRTE_PMD_AESNI_MB=y in config/common_linuxapp.
