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diff --git a/src/spdk/dpdk/doc/guides/cryptodevs/snow3g.rst b/src/spdk/dpdk/doc/guides/cryptodevs/snow3g.rst new file mode 100644 index 000000000..e0cddc2d7 --- /dev/null +++ b/src/spdk/dpdk/doc/guides/cryptodevs/snow3g.rst @@ -0,0 +1,119 @@ +.. SPDX-License-Identifier: BSD-3-Clause + Copyright(c) 2016-2019 Intel Corporation. + +SNOW 3G Crypto Poll Mode Driver +=============================== + +The SNOW3G PMD (**librte_snow3g_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 F8 functions for SNOW 3G UEA2 cipher and UIA2 hash algorithms. + +Features +-------- + +SNOW 3G PMD has support for: + +Cipher algorithm: + +* RTE_CRYPTO_CIPHER_SNOW3G_UEA2 + +Authentication algorithm: + +* RTE_CRYPTO_AUTH_SNOW3G_UIA2 + +Limitations +----------- + +* Chained mbufs are not supported. +* SNOW 3G (UIA2) supported only if hash offset field is byte-aligned. +* In-place bit-level operations for SNOW 3G (UEA2) are not supported + (if length and/or offset of data to be ciphered is not byte-aligned). + +Installation +------------ + +To build DPDK with the SNOW3G_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_snow3g_versions: + +.. table:: DPDK and external crypto library version compatibility + + ============= ================================ + DPDK version Crypto library version + ============= ================================ + 16.04 - 19.11 LibSSO SNOW3G + 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,\(CONFIG_RTE_LIBRTE_PMD_SNOW3G\)=n,\1=y,' build/.config + make + +To use the PMD in an application, user must: + +* Call rte_vdev_init("crypto_snow3g") within the application. + +* Use --vdev="crypto_snow3g" 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_snow3g,socket_id=0,max_nb_sessions=128" \ + -- -p 1 --cdev SW --chain CIPHER_ONLY --cipher_algo "snow3g-uea2" |