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.. SPDX-License-Identifier: BSD-3-Clause
Copyright(c) 2018 Cavium Networks.
OCTEON TX ZIP Compression Poll Mode Driver
==========================================
The OCTEON TX ZIP PMD (**librte_compress_octeontx**) provides poll mode
compression & decompression driver for ZIP HW offload device, found in
**Cavium OCTEON TX** SoC family.
More information can be found at `Cavium, Inc Official Website
<http://www.cavium.com/OCTEON-TX_ARM_Processors.html>`_.
Features
--------
OCTEON TX ZIP PMD has support for:
Compression/Decompression algorithm:
* DEFLATE
Huffman code type:
* FIXED
* DYNAMIC
Window size support:
* 2 to 2^14
Limitations
-----------
* Chained mbufs are not supported.
Supported OCTEON TX SoCs
------------------------
- CN83xx
Steps To Setup Platform
-----------------------
OCTEON TX SDK includes kernel image which provides OCTEON TX ZIP PF
driver to manage configuration of ZIPVF device
Required version of SDK is "OCTEONTX-SDK-6.2.0-build35" or above.
SDK can be install by using below command.
#rpm -ivh OCTEONTX-SDK-6.2.0-build35.x86_64.rpm --force --nodeps
It will install OCTEONTX-SDK at following default location
/usr/local/Cavium_Networks/OCTEONTX-SDK/
For more information on building and booting linux kernel on OCTEON TX
please refer /usr/local/Cavium_Networks/OCTEONTX-SDK/docs/OcteonTX-SDK-UG_6.2.0.pdf.
SDK and related information can be obtained from: `Cavium support site <https://support.cavium.com/>`_.
Initialization
--------------
The OCTEON TX zip is exposed as pci device which consists of a set of
PCIe VF devices. On EAL initialization, ZIP PCIe VF devices will be
probed. To use the PMD in an application, user must:
* run dev_bind script to bind eight ZIP PCIe VFs to the ``vfio-pci`` driver:
.. code-block:: console
./usertools/dpdk-devbind.py -b vfio-pci 0001:04:00.1
./usertools/dpdk-devbind.py -b vfio-pci 0001:04:00.2
./usertools/dpdk-devbind.py -b vfio-pci 0001:04:00.3
./usertools/dpdk-devbind.py -b vfio-pci 0001:04:00.4
./usertools/dpdk-devbind.py -b vfio-pci 0001:04:00.5
./usertools/dpdk-devbind.py -b vfio-pci 0001:04:00.6
./usertools/dpdk-devbind.py -b vfio-pci 0001:04:00.7
./usertools/dpdk-devbind.py -b vfio-pci 0001:04:01.0
* The unit test cases can be tested as below:
.. code-block:: console
reserve enough huge pages
cd to <build_dir>
meson test compressdev_autotest
|
