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numam-dpdk/doc/guides/bbdevs/turbo_sw.rst
Ciara Power 07a2a57261 doc: remove references to make from bbdevs guide 
Make is no longer supported for compiling DPDK, references are now
removed in the documentation.

Signed-off-by: Ciara Power <ciara.power@intel.com>
Reviewed-by: Kevin Laatz <kevin.laatz@intel.com>
2020-10-22 22:54:05 +02:00

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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 software only poll mode bbdev
driver that can optionally utilize Intel optimized libraries for LTE and 5GNR
Layer 1 workloads acceleration.
Note that the driver can also be built without any dependency with reduced
functionality for maintenance purpose.
To enable linking to the SDK libraries see detailed installation section below.
This PMD supports the functions: FEC, Rate Matching and CRC functions detailed
in the Features section.
Features
--------
SW Turbo PMD can support for the following capabilities when the SDK libraries
are used:
For the LTE 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 LTE 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``
For the 5G NR LDPC encode operation:
* ``RTE_BBDEV_LDPC_RATE_MATCH``
* ``RTE_BBDEV_LDPC_CRC_24A_ATTACH``
* ``RTE_BBDEV_LDPC_CRC_24B_ATTACH``
For the 5G NR LDPC decode operation:
* ``RTE_BBDEV_LDPC_CRC_TYPE_24B_CHECK``
* ``RTE_BBDEV_LDPC_CRC_TYPE_24A_CHECK``
* ``RTE_BBDEV_LDPC_CRC_TYPE_24B_DROP``
* ``RTE_BBDEV_LDPC_HQ_COMBINE_IN_ENABLE``
* ``RTE_BBDEV_LDPC_HQ_COMBINE_OUT_ENABLE``
* ``RTE_BBDEV_LDPC_ITERATION_STOP_ENABLE``
Limitations
-----------
* In-place operations for encode and decode are not supported
Installation
------------
FlexRAN SDK Download
~~~~~~~~~~~~~~~~~~~~
As an option it is possible to link this driver with FleXRAN SDK libraries
which can enable real time signal processing using AVX instructions.
These libraries are available through this `link <https://software.intel.com/en-us/articles/flexran-lte-and-5g-nr-fec-software-development-kit-modules>`_.
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 FEC SDK releases compliance
===================== ============================
DPDK version FlexRAN FEC SDK release
===================== ============================
19.08 19.04
===================== ============================
FlexRAN SDK Installation
~~~~~~~~~~~~~~~~~~~~~~~~
Note that the installation of these libraries is optional.
The following are pre-requisites for building FlexRAN SDK Libraries:
(a) An AVX2 or AVX512 supporting machine
(b) CentOS Linux release 7.2.1511 (Core) operating system is advised
(c) Intel ICC 18.0.1 20171018 compiler or more recent and related libraries
ICC is `available with a free community license <https://software.intel.com/en-us/system-studio/choose-download#technical>`_.
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
#. Run the SDK extractor script and accept the license:
.. code-block:: console
cd <path-to-workspace>
./FlexRAN-FEC-SDK-19-04.sh
#. Generate makefiles based on system configuration:
.. code-block:: console
cd <path-to-workspace>/FlexRAN-FEC-SDK-19-04/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-avx512-icc/
make && make install
Initialization
--------------
In order to enable this virtual bbdev PMD, the user may:
* 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.
* Tune the meson build option pointing the location of the FlexRAN SDK libraries ``flexran_sdk``
Example:
.. code-block:: console
export FLEXRAN_SDK=<path-to-workspace>/FlexRAN-FEC-SDK-19-04/sdk/build-avx2-icc/install
export DIR_WIRELESS_SDK=<path-to-workspace>/FlexRAN-FEC-SDK-19-04/sdk/build-avx2-icc/
cd build
meson configure -Dflexran_sdk=<path-to-workspace>/FlexRAN-FEC-SDK-19-04/sdk/build-avx512-icc/install
* For AVX512 machines with SDK libraries installed then both 4G and 5G can be enabled for full real time FEC capability.
For AVX2 machines it is possible to only enable the 4G libraries and the PMD capabilities will be limited to 4G FEC.
If no library is present then the PMD driver will still build but its capabilities will be limited accordingly.
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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