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.. SPDX-License-Identifier: BSD-3-Clause
Copyright 2017 NXP
NXP DPAA Eventdev Driver
=========================
The dpaa eventdev is an implementation of the eventdev API, that provides a
wide range of the eventdev features. The eventdev relies on a dpaa based
platform 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 DPAA EVENTDEV implements many features in the eventdev API;
- Hardware based event scheduler
- 4 event ports
- 4 event queues
- Parallel flows
- Atomic flows
Supported DPAA SoCs
--------------------
- LS1046A
- LS1043A
Prerequisites
-------------
There are following pre-requisites for executing EVENTDEV on a DPAA compatible
platform:
1. **ARM 64 Tool Chain**
For example, the `*aarch64* Linaro Toolchain <https://releases.linaro.org/components/toolchain/binaries/6.4-2017.08/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, DPAA 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 DPAA 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**
DPAA based resources can be configured easily with the help of ready to use
xml files 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+** or LSDK **17.09+**
- Supported architectures: **arm64 LE**.
- Follow the DPDK :ref:`Getting Started Guide for Linux <linux_gsg>` to setup the basic DPDK environment.
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_DPAA_EVENTDEV`` (default ``y``)
Toggle compilation of the ``librte_pmd_dpaa_event`` driver.
Driver Compilation
~~~~~~~~~~~~~~~~~~
To compile the DPAA EVENTDEV PMD for Linux arm64 gcc target, run the
following ``make`` command:
.. code-block:: console
cd <DPDK-source-directory>
make config T=arm64-dpaa-linuxapp-gcc install
Initialization
--------------
The dpaa eventdev is exposed as a vdev device which consists of a set of channels
and queues. On EAL initialization, dpaa components will be
probed and then vdev device can be created from the application code by
* Invoking ``rte_vdev_init("event_dpaa1")`` from the application
* Using ``--vdev="event_dpaa1"`` in the EAL options, which will call
rte_vdev_init() internally
Example:
.. code-block:: console
./your_eventdev_application --vdev="event_dpaa1"
Limitations
-----------
1. DPAA eventdev can not work with DPAA PUSH mode queues configured for ethdev.
Please configure export DPAA_NUM_PUSH_QUEUES=0
Platform Requirement
~~~~~~~~~~~~~~~~~~~~
DPAA drivers for DPDK can only work on NXP SoCs as listed in the
``Supported DPAA SoCs``.
Port-core Binding
~~~~~~~~~~~~~~~~~
DPAA EVENTDEV driver requires event port 'x' to be used on core 'x'.
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