From 97f17497d162afdb82c8704bf097f0fee3724b2e Mon Sep 17 00:00:00 2001 From: "C.J. Collier" Date: Tue, 14 Jun 2016 07:50:17 -0700 Subject: Imported Upstream version 16.04 Change-Id: I77eadcd8538a9122e4773cbe55b24033dc451757 Signed-off-by: C.J. Collier --- doc/guides/cryptodevs/null.rst | 96 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 96 insertions(+) create mode 100644 doc/guides/cryptodevs/null.rst (limited to 'doc/guides/cryptodevs/null.rst') diff --git a/doc/guides/cryptodevs/null.rst b/doc/guides/cryptodevs/null.rst new file mode 100644 index 00000000..b68d4cd2 --- /dev/null +++ b/doc/guides/cryptodevs/null.rst @@ -0,0 +1,96 @@ +.. BSD LICENSE + Copyright(c) 2016 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. + +Null Crypto Poll Mode Driver +============================ + +The Null Crypto PMD (**librte_pmd_null_crypto**) provides a crypto poll mode +driver which provides a minimal implementation for a software crypto device. As +a null device it does not modify the data in the mbuf on which the crypto +operation is to operate and it only has support for a single cipher and +authentication algorithm. + +When a burst of mbufs is submitted to a Null Crypto PMD for processing then +each mbuf in the burst will be enqueued in an internal buffer for collection on +a dequeue call as long as the mbuf has a valid rte_mbuf_offload operation with +a valid rte_cryptodev_session or rte_crypto_xform chain of operations. + +Features +-------- + +Modes: + +* RTE_CRYPTO_XFORM_CIPHER ONLY +* RTE_CRYPTO_XFORM_AUTH ONLY +* RTE_CRYPTO_XFORM_CIPHER THEN RTE_CRYPTO_XFORM_AUTH +* RTE_CRYPTO_XFORM_AUTH THEN RTE_CRYPTO_XFORM_CIPHER + +Cipher algorithms: + +* RTE_CRYPTO_CIPHER_NULL + +Authentication algorithms: + +* RTE_CRYPTO_AUTH_NULL + +Limitations +----------- + +* Only in-place is currently supported (destination address is the same as + source address). + +Installation +------------ + +The Null Crypto PMD is enabled and built by default in both the Linux and +FreeBSD builds. + +Initialization +-------------- + +To use the PMD in an application, user must: + +* Call rte_eal_vdev_init("cryptodev_null_pmd") within the application. + +* Use --vdev="cryptodev_null_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_null_pmd,socket_id=1,max_nb_sessions=128" -- cgit 1.2.3-korg