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.. SPDX-License-Identifier: BSD-3-Clause
Copyright(c) 2017 Intel Corporation
SW Turbo Poll Mode Driver
=========================
The SW Turbo PMD (**baseband_turbo_sw**) provides a poll mode bbdev driver that utilizes
Intel optimized libraries for LTE Layer 1 workloads acceleration. This PMD
supports the functions: Turbo FEC, Rate Matching and CRC functions.
Features
--------
SW Turbo PMD has support for the following capabilities:
For the encode operation:
* ``RTE_BBDEV_TURBO_CRC_24A_ATTACH``
* ``RTE_BBDEV_TURBO_CRC_24B_ATTACH``
* ``RTE_BBDEV_TURBO_RATE_MATCH``
* ``RTE_BBDEV_TURBO_RV_INDEX_BYPASS``
For the decode operation:
* ``RTE_BBDEV_TURBO_SUBBLOCK_DEINTERLEAVE``
* ``RTE_BBDEV_TURBO_CRC_TYPE_24B``
* ``RTE_BBDEV_TURBO_POS_LLR_1_BIT_IN``
* ``RTE_BBDEV_TURBO_NEG_LLR_1_BIT_IN``
* ``RTE_BBDEV_TURBO_DEC_TB_CRC_24B_KEEP``
* ``RTE_BBDEV_TURBO_EARLY_TERMINATION``
Limitations
-----------
* In-place operations for Turbo encode and decode are not supported
Installation
------------
FlexRAN SDK Download
~~~~~~~~~~~~~~~~~~~~
To build DPDK with the *baseband_turbo_sw* PMD the user is required to download
the export controlled ``FlexRAN SDK`` Libraries. An account at `Intel Resource
Design Center <https://www.intel.com/content/www/us/en/design/resource-design-center.html>`_
needs to be registered.
Once registered, the user needs to log in, and look for
*Intel FlexRAN Software Release Package -1-6-0* to download or directly through
this `link <https://cdrdv2.intel.com/v1/dl/getContent/600609>`_.
After download is complete, the user needs to unpack and compile on their
system before building DPDK.
The following table maps DPDK versions with past FlexRAN SDK releases:
.. _table_flexran_releases:
.. table:: DPDK and FlexRAN SDK releases compliance
===================== ============================
DPDK version FlexRAN SDK release
===================== ============================
18.02 1.3.0
18.05 1.4.0
18.08 1.6.0
===================== ============================
FlexRAN SDK Installation
~~~~~~~~~~~~~~~~~~~~~~~~
The following are pre-requisites for building FlexRAN SDK Libraries:
(a) An AVX2 supporting machine
(b) CentOS Linux release 7.2.1511 (Core) operating system
(c) Intel ICC 18.0.1 20171018 compiler installed
The following instructions should be followed in this exact order:
#. Set the environment variables:
.. code-block:: console
source <path-to-icc-compiler-install-folder>/linux/bin/compilervars.sh intel64 -platform linux
#. Extract the ``flexran-1-6-0-tar.gz.zip`` package:
.. code-block:: console
unzip flexran-1-6-0-tar.gz.zip
tar xvzf flexran-1-6-0-tar.gz -C FlexRAN-1.6.0/
#. Run the SDK extractor script and accept the license:
.. code-block:: console
cd <path-to-workspace>/FlexRAN-1.6.0/
./SDK-R1.6.0.sh
#. Generate makefiles based on system configuration:
.. code-block:: console
cd <path-to-workspace>/FlexRAN-1.6.0/SDK-R1.6.0/sdk/
./create-makefiles-linux.sh
#. A build folder is generated in this form ``build-<ISA>-<CC>``, enter that
folder and install:
.. code-block:: console
cd build-avx2-icc/
make && make install
Initialization
--------------
In order to enable this virtual bbdev PMD, the user must:
* Build the ``FLEXRAN SDK`` libraries (explained in Installation section).
* Export the environmental variables ``FLEXRAN_SDK`` to the path where the
FlexRAN SDK libraries were installed. And ``DIR_WIRELESS_SDK`` to the path
where the libraries were extracted.
Example:
.. code-block:: console
export FLEXRAN_SDK=<path-to-workspace>/FlexRAN-1.6.0/SDK-R1.6.0/sdk/build-avx2-icc/install
export DIR_WIRELESS_SDK=<path-to-workspace>/FlexRAN-1.6.0/SDK-R1.6.0/sdk/
* Set ``CONFIG_RTE_LIBRTE_PMD_BBDEV_TURBO_SW=y`` in DPDK common configuration
file ``config/common_base``.
To use the PMD in an application, user must:
- Call ``rte_vdev_init("baseband_turbo_sw")`` within the application.
- Use ``--vdev="baseband_turbo_sw"`` in the EAL options, which will call ``rte_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_queues``: Specify the maximum number of queues in the device (default is ``RTE_MAX_LCORE``).
Example:
~~~~~~~~
.. code-block:: console
./test-bbdev.py -e="--vdev=baseband_turbo_sw,socket_id=0,max_nb_queues=8" \
-c validation -v ./turbo_*_default.data
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