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.. BSD LICENSE
Copyright 2017 NXP.
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 NXP 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.
NXP DPAA2 Eventdev Driver
=========================
The dpaa2 eventdev is an implementation of the eventdev API, that provides a
wide range of the eventdev features. The eventdev relies on a dpaa2 hw to
perform event scheduling.
More information can be found at `NXP Official Website
<http://www.nxp.com/products/microcontrollers-and-processors/arm-processors/qoriq-arm-processors:QORIQ-ARM>`_.
Features
--------
The DPAA2 EVENTDEV implements many features in the eventdev API;
- Hardware based event scheduler
- 8 event ports
- 8 event queues
- Parallel flows
- Atomic flows
Supported DPAA2 SoCs
--------------------
- LS2080A/LS2040A
- LS2084A/LS2044A
- LS2088A/LS2048A
- LS1088A/LS1048A
Prerequisites
-------------
There are three main pre-requisities for executing DPAA2 EVENTDEV on a DPAA2
compatible board:
1. **ARM 64 Tool Chain**
For example, the `*aarch64* Linaro Toolchain <https://releases.linaro.org/components/toolchain/binaries/4.9-2017.01/aarch64-linux-gnu>`_.
2. **Linux Kernel**
It can be obtained from `NXP's Github hosting <https://github.com/qoriq-open-source/linux>`_.
3. **Rootfile system**
Any *aarch64* supporting filesystem can be used. For example,
Ubuntu 15.10 (Wily) or 16.04 LTS (Xenial) userland which can be obtained
from `here <http://cdimage.ubuntu.com/ubuntu-base/releases/16.04/release/ubuntu-base-16.04.1-base-arm64.tar.gz>`_.
As an alternative method, DPAA2 EVENTDEV can also be executed using images provided
as part of SDK from NXP. The SDK includes all the above prerequisites necessary
to bring up a DPAA2 board.
The following dependencies are not part of DPDK and must be installed
separately:
- **NXP Linux SDK**
NXP Linux software development kit (SDK) includes support for family
of QorIQ® ARM-Architecture-based system on chip (SoC) processors
and corresponding boards.
It includes the Linux board support packages (BSPs) for NXP SoCs,
a fully operational tool chain, kernel and board specific modules.
SDK and related information can be obtained from: `NXP QorIQ SDK <http://www.nxp.com/products/software-and-tools/run-time-software/linux-sdk/linux-sdk-for-qoriq-processors:SDKLINUX>`_.
- **DPDK Extra Scripts**
DPAA2 based resources can be configured easily with the help of ready scripts
as provided in the DPDK Extra repository.
`DPDK Extras Scripts <https://github.com/qoriq-open-source/dpdk-extras>`_.
Currently supported by DPDK:
- NXP SDK **2.0+**.
- MC Firmware version **10.0.0** and higher.
- Supported architectures: **arm64 LE**.
- Follow the DPDK :ref:`Getting Started Guide for Linux <linux_gsg>` to setup the basic DPDK environment.
.. note::
Some part of fslmc bus code (mc flib - object library) routines are
dual licensed (BSD & GPLv2).
Pre-Installation Configuration
------------------------------
Config File Options
~~~~~~~~~~~~~~~~~~~
The following options can be modified in the ``config`` file.
Please note that enabling debugging options may affect system performance.
- ``CONFIG_RTE_LIBRTE_PMD_DPAA2_EVENTDEV`` (default ``y``)
Toggle compilation of the ``lrte_pmd_dpaa2_event`` driver.
- ``CONFIG_RTE_LIBRTE_PMD_DPAA2_EVENTDEV_DEBUG`` (default ``n``)
Toggle display of generic debugging messages
Driver Compilation
~~~~~~~~~~~~~~~~~~
To compile the DPAA2 EVENTDEV PMD for Linux arm64 gcc target, run the
following ``make`` command:
.. code-block:: console
cd <DPDK-source-directory>
make config T=arm64-dpaa2-linuxapp-gcc install
Initialization
--------------
The dpaa2 eventdev is exposed as a vdev device which consists of a set of dpcon
devices and dpci devices. On EAL initialization, dpcon and dpci devices will be
probed and then vdev device can be created from the application code by
* Invoking ``rte_vdev_init("event_dpaa2")`` from the application
* Using ``--vdev="event_dpaa2"`` in the EAL options, which will call
rte_vdev_init() internally
Example:
.. code-block:: console
./your_eventdev_application --vdev="event_dpaa2"
Limitations
-----------
Platform Requirement
~~~~~~~~~~~~~~~~~~~~
DPAA2 drivers for DPDK can only work on NXP SoCs as listed in the
``Supported DPAA2 SoCs``.
Port-core binding
~~~~~~~~~~~~~~~~~
DPAA2 EVENTDEV driver requires event port 'x' to be used on core 'x'.
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