Adds the description of the cryptodev scheduler PMD overview, limitations, build, instructions, modes, etc.
Signed-off-by: Fan Zhang <roy.fan.zh...@intel.com> --- doc/guides/cryptodevs/img/scheduler-overview.svg | 277 +++++++++++++++++++++++ doc/guides/cryptodevs/index.rst | 3 +- doc/guides/cryptodevs/scheduler.rst | 128 +++++++++++ 3 files changed, 407 insertions(+), 1 deletion(-) create mode 100644 doc/guides/cryptodevs/img/scheduler-overview.svg create mode 100644 doc/guides/cryptodevs/scheduler.rst diff --git a/doc/guides/cryptodevs/img/scheduler-overview.svg b/doc/guides/cryptodevs/img/scheduler-overview.svg new file mode 100644 index 0000000..82bb775 --- /dev/null +++ b/doc/guides/cryptodevs/img/scheduler-overview.svg @@ -0,0 +1,277 @@ +<?xml version="1.0" encoding="UTF-8" standalone="no"?> +<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd";> +<!-- Generated by Microsoft Visio, SVG Export scheduler-fan.svg Page-1 --> +<svg xmlns="http://www.w3.org/2000/svg"; xmlns:xlink="http://www.w3.org/1999/xlink"; 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BSD LICENSE - Copyright(c) 2015 - 2016 Intel Corporation. All rights reserved. + Copyright(c) 2015 - 2017 Intel Corporation. All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions @@ -42,6 +42,7 @@ Crypto Device Drivers kasumi openssl null + scheduler snow3g qat zuc diff --git a/doc/guides/cryptodevs/scheduler.rst b/doc/guides/cryptodevs/scheduler.rst new file mode 100644 index 0000000..70fb62e --- /dev/null +++ b/doc/guides/cryptodevs/scheduler.rst @@ -0,0 +1,128 @@ +.. BSD LICENSE + Copyright(c) 2017 Intel Corporation. All rights reserved. + 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. + +Cryptodev Scheduler Poll Mode Driver Library +============================================ + +Scheduler PMD is a software crypto PMD, which has the capabilities of +attaching hardware and/or software cryptodevs, and distributes ingress +crypto ops among them in a certain manner. + +.. figure:: img/scheduler-overview.* + + Cryptodev Scheduler Overview + + +The Cryptodev Scheduler PMD library (**librte_pmd_crypto_scheduler**) acts as +a software crypto PMD and shares the same API provided by librte_cryptodev. +The PMD supports attaching multiple crypto PMDs, software or hardware, as +slaves, and distributes the crypto workload to them with certain behavior. +The behaviors are categorizes as different "modes". Basically, a scheduling +mode defines certain actions for scheduling crypto ops to its slaves. + +The librte_pmd_crypto_scheduler library exports a C API which provides an API +for attaching/detaching slaves, set/get scheduling modes, and enable/disable +crypto ops reordering. + +Limitations +----------- + +* Sessionless crypto operation is not supported +* OOP crypto operation is not supported when the crypto op reordering feature + is enabled. + + +Installation +------------ + +To build DPDK with CRYTPO_SCHEDULER_PMD the user is required to set +CONFIG_RTE_LIBRTE_PMD_CRYPTO_SCHEDULER=y in config/common_base, and +recompile DPDK + + +Initialization +-------------- + +To use the PMD in an application, user must: + +* Call rte_eal_vdev_init("crpyto_scheduler") within the application. + +* Use --vdev="crpyto_scheduler" 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_sessions: Specify the maximum number of sessions that can be + created. This value may be overwritten internally if there are too + many devices are attached. + +* slave: If a cryptodev has been initialized with specific name, it can be + attached to the scheduler using this parameter, simply filling the name + here. Multiple cryptodevs can be attached initially by presenting this + parameter multiple times. + +Example: + +.. code-block:: console + + ... --vdev "crypto_aesni_mb_pmd,name=aesni_mb_1" --vdev "crypto_aesni_mb_pmd,name=aesni_mb_2" --vdev "crypto_scheduler_pmd,slave=aesni_mb_1,slave=aesni_mb_2" ... + +.. note:: + + * The scheduler cryptodev cannot be started unless the scheduling mode + is set and at least one slave is attached. Also, to configure the + scheduler in the run-time, like attach/detach slave(s), change + scheduling mode, or enable/disable crypto op ordering, one should stop + the scheduler first, otherwise an error will be returned. + + * The crypto op reordering feature requires using the userdata field of + every mbuf to be processed to store temporary data. By the end of + processing, the field is set to pointing to NULL, any previously + stored value of this field will be lost. + + +Cryptodev Scheduler Modes Overview +---------------------------------- + +Currently the Crypto Scheduler PMD library supports following modes of +operation: + +* **CDEV_SCHED_MODE_ROUNDROBIN:** + + Round-robin mode, which distributes the enqueued burst of crypto ops + among its slaves in a round-robin manner. This mode may help to fill + the throughput gap between the physical core and the existing cryptodevs + to increase the overall performance. -- 2.7.4
