5630257fcc
Signed-off-by: Ferruh Yigit <ferruh.yigit@intel.com> Acked-by: Bruce Richardson <bruce.richardson@intel.com>
72 lines
2.1 KiB
ReStructuredText
72 lines
2.1 KiB
ReStructuredText
.. SPDX-License-Identifier: BSD-3-Clause
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Copyright(c) 2016 Intel Corporation.
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Null Crypto Poll Mode Driver
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============================
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The Null Crypto PMD (**librte_pmd_null_crypto**) provides a crypto poll mode
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driver which provides a minimal implementation for a software crypto device. As
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a null device it does not modify the data in the mbuf on which the crypto
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operation is to operate and it only has support for a single cipher and
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authentication algorithm.
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When a burst of mbufs is submitted to a Null Crypto PMD for processing then
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each mbuf in the burst will be enqueued in an internal buffer for collection on
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a dequeue call as long as the mbuf has a valid rte_mbuf_offload operation with
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a valid rte_cryptodev_session or rte_crypto_xform chain of operations.
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Features
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--------
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Modes:
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* RTE_CRYPTO_XFORM_CIPHER ONLY
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* RTE_CRYPTO_XFORM_AUTH ONLY
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* RTE_CRYPTO_XFORM_CIPHER THEN RTE_CRYPTO_XFORM_AUTH
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* RTE_CRYPTO_XFORM_AUTH THEN RTE_CRYPTO_XFORM_CIPHER
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Cipher algorithms:
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* RTE_CRYPTO_CIPHER_NULL
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Authentication algorithms:
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* RTE_CRYPTO_AUTH_NULL
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Limitations
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-----------
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* Only in-place is currently supported (destination address is the same as
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source address).
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Installation
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------------
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The Null Crypto PMD is enabled and built by default in both the Linux and
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FreeBSD builds.
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Initialization
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--------------
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To use the PMD in an application, user must:
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* Call rte_vdev_init("crypto_null") within the application.
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* Use --vdev="crypto_null" in the EAL options, which will call rte_vdev_init() internally.
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The following parameters (all optional) can be provided in the previous two calls:
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* socket_id: Specify the socket where the memory for the device is going to be allocated
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(by default, socket_id will be the socket where the core that is creating the PMD is running on).
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* max_nb_queue_pairs: Specify the maximum number of queue pairs in the device (8 by default).
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* max_nb_sessions: Specify the maximum number of sessions that can be created (2048 by default).
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Example:
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.. code-block:: console
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./l2fwd-crypto -l 1 -n 4 --vdev="crypto_null,socket_id=0,max_nb_sessions=128" \
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-- -p 1 --cdev SW --chain CIPHER_ONLY --cipher_algo "null"
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