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.. BSD LICENSE
Copyright(c) 2015 Intel Corporation. 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.
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_AES192_CBC
* RTE_CRYPTO_SYM_CIPHER_AES256_CBC
* RTE_CRYPTO_SYM_CIPHER_AES128_CTR
* RTE_CRYPTO_SYM_CIPHER_AES192_CTR
* RTE_CRYPTO_SYM_CIPHER_AES256_CTR
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
Initialization
--------------
In order to enable this virtual crypto PMD, user must:
* Export the environmental variable AESNI_MULTI_BUFFER_LIB_PATH with the path where
the library was extracted.
* Build the multi buffer library (explained in Installation section).
* Set CONFIG_RTE_LIBRTE_PMD_AESNI_MB=y in config/common_base.
To use the PMD in an application, user must:
* Call rte_eal_vdev_init("cryptodev_aesni_mb_pmd") within the application.
* Use --vdev="cryptodev_aesni_mb_pmd" in the EAL options, which will call rte_eal_vdev_init() internally.
The following parameters (all 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).
* max_nb_queue_pairs: Specify the maximum number of queue pairs in the device (8 by default).
* max_nb_sessions: Specify the maximum number of sessions that can be created (2048 by default).
Example:
.. code-block:: console
./l2fwd-crypto -c 40 -n 4 --vdev="cryptodev_aesni_mb_pmd,socket_id=1,max_nb_sessions=128"
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