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.. SPDX-License-Identifier: BSD-3-Clause
Copyright(c) 2016-2019 Intel Corporation.
ZUC Crypto Poll Mode Driver
===========================
The ZUC PMD (**librte_pmd_zuc**) provides poll mode crypto driver support for
utilizing `Intel IPSec Multi-buffer library <https://github.com/01org/intel-ipsec-mb>`_
which implements F8 and F9 functions for ZUC EEA3 cipher and EIA3 hash algorithms.
Features
--------
ZUC PMD has support for:
Cipher algorithm:
* RTE_CRYPTO_CIPHER_ZUC_EEA3
Authentication algorithm:
* RTE_CRYPTO_AUTH_ZUC_EIA3
Limitations
-----------
* Chained mbufs are not supported.
* ZUC (EIA3) supported only if hash offset field is byte-aligned.
* ZUC (EEA3) supported only if cipher length, cipher offset fields are byte-aligned.
Installation
------------
To build DPDK with the ZUC_PMD the user is required to download the multi-buffer
library from `here <https://github.com/01org/intel-ipsec-mb>`_
and compile it on their user system before building DPDK.
The latest version of the library supported by this PMD is v0.54, which
can be downloaded from `<https://github.com/01org/intel-ipsec-mb/archive/v0.54.zip>`_.
After downloading the library, the user needs to unpack and compile it
on their system before building DPDK:
.. code-block:: console
make
make install
The library requires NASM to be built. Depending on the library version, it might
require a minimum NASM version (e.g. v0.54 requires at least NASM 2.14).
NASM is packaged for different OS. However, on some OS the version is too old,
so a manual installation is required. In that case, NASM can be downloaded from
`NASM website <https://www.nasm.us/pub/nasm/releasebuilds/?C=M;O=D>`_.
Once it is downloaded, extract it and follow these steps:
.. code-block:: console
./configure
make
make install
.. note::
Compilation of the Multi-Buffer library is broken when GCC < 5.0, if library <= v0.53.
If a lower GCC version than 5.0, the workaround proposed by the following link
should be used: `<https://github.com/intel/intel-ipsec-mb/issues/40>`_.
As a reference, the following table shows a mapping between the past DPDK versions
and the external crypto libraries supported by them:
.. _table_zuc_versions:
.. table:: DPDK and external crypto library version compatibility
============= ================================
DPDK version Crypto library version
============= ================================
16.11 - 19.11 LibSSO ZUC
20.02+ Multi-buffer library 0.53 - 0.54
============= ================================
Initialization
--------------
In order to enable this virtual crypto PMD, user must:
* Build the multi buffer library (explained in Installation section).
* Build DPDK as follows:
.. code-block:: console
make config T=x86_64-native-linux-gcc
sed -i 's,\(CONFIG_RTE_LIBRTE_PMD_ZUC\)=n,\1=y,' build/.config
make
To use the PMD in an application, user must:
* Call rte_vdev_init("crypto_zuc") within the application.
* Use --vdev="crypto_zuc" in the EAL options, which will call rte_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 -l 1 -n 4 --vdev="crypto_zuc,socket_id=0,max_nb_sessions=128" \
-- -p 1 --cdev SW --chain CIPHER_ONLY --cipher_algo "zuc-eea3"
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