+ * Added support for Rx scatter in EF10 datapath implementation.
+ * Added support for Rx descriptor status API in EF10 datapath implementation.
+ * Added support for TSO in EF10 datapath implementation.
+ * Added support for Tx descriptor status API in EF10 (ef10 and ef10_simple)
+ datapaths implementation.
+
+* **Updated the enic driver.**
+
+ * Added AVX2-based vectorized Rx handler.
+ * Added VLAN and checksum offloads to the simple Tx handler.
+ * Added the "count" flow action.
+ * Enabled the virtual address IOVA mode.
+
+* **Updated the failsafe driver.**
+
+ Updated the failsafe driver including the following changes:
+
+ * Added support for Rx and Tx queues start and stop.
+ * Added support for Rx and Tx queues deferred start.
+ * Added support for runtime Rx and Tx queues setup.
+ * Added support multicast MAC address set.
+
+* **Added a devarg to use a PCAP interface physical MAC address.**
+
+ A new devarg ``phy_mac`` was introduced to allow users to use the physical
+ MAC address of the selected PCAP interface.
+
+* **Added TAP Rx/Tx queues sharing with a secondary process.**
+
+ Added support to allow a secondary process to attach a TAP device created
+ in the primary process, probe the queues, and process Rx/Tx in a secondary
+ process.
+
+* **Added classification and metering support to SoftNIC PMD.**
+
+ Added support for flow classification (rte_flow API), and metering and
+ policing (rte_mtr API) to the SoftNIC PMD.
+
+* **Added Crypto support to the Softnic PMD.**
+
+ The Softnic is now capable of processing symmetric crypto workloads such
+ as cipher, cipher-authentication chaining, and AEAD encryption and
+ decryption. This is achieved by calling DPDK Cryptodev APIs.
+
+* **Added cryptodev port to port library.**
+
+ Cryptodev port is a shim layer in the port library that interacts with DPDK
+ Cryptodev PMDs including burst enqueuing and dequeuing crypto operations.
+
+* **Added symmetric cryptographic actions to the pipeline library.**
+
+ In the pipeline library support was added for symmetric crypto action
+ parsing and an action handler was implemented. The action allows automatic
+ preparation of the crypto operation with the rules specified such as
+ algorithm, key, and IV, etc. for the cryptodev port to process.
+
+* **Updated the AESNI MB PMD.**
+
+ The AESNI MB PMD has been updated with additional support for the AES-GCM
+ algorithm.
+
+* **Added NXP CAAM JR PMD.**
+
+ Added the new caam job ring driver for NXP platforms. See the
+ :doc:`../cryptodevs/caam_jr` guide for more details on this new driver.
+
+* **Added support for GEN3 devices to Intel QAT driver.**
+
+ Added support for the third generation of Intel QuickAssist devices.
+
+* **Updated the QAT PMD.**
+
+ The QAT PMD was updated with additional support for:
+
+ * The AES-CMAC algorithm.
+
+* **Added support for Dynamic Huffman Encoding to Intel QAT comp PMD.**
+
+ The Intel QuickAssist (QAT) compression PMD has been updated with support
+ for Dynamic Huffman Encoding for the Deflate algorithm.
+
+* **Added Event Ethernet Tx Adapter.**
+
+ Added event ethernet Tx adapter library that provides configuration and
+ data path APIs for the ethernet transmit stage of an event driven packet
+ processing application. These APIs abstract the implementation of the
+ transmit stage and allow the application to use eventdev PMD support or
+ a common implementation.
+
+* **Added Distributed Software Eventdev PMD.**
+
+ Added the new Distributed Software Event Device (DSW), which is a
+ pure-software eventdev driver distributing the work of scheduling
+ among all eventdev ports and the lcores using them. DSW, compared to
+ the SW eventdev PMD, sacrifices load balancing performance to
+ gain better event scheduling throughput and scalability.
+
+* **Added extendable bucket feature to hash library (rte_hash).**
+
+ This new "extendable bucket" feature provides 100% insertion guarantee to
+ the capacity specified by the user by extending hash table with extra
+ buckets when needed to accommodate the unlikely event of intensive hash
+ collisions. In addition, the internal hashing algorithm was changed to use
+ partial-key hashing to improve memory efficiency and lookup performance.
+
+* **Added lock free reader/writer concurrency to hash library (rte_hash).**
+
+ Lock free reader/writer concurrency prevents the readers from getting
+ blocked due to a preempted writer thread. This allows the hash library
+ to be used in scenarios where the writer thread runs on the control plane.
+
+* **Added Traffic Pattern Aware Power Control Library.**
+
+ Added an experimental library that extends the Power Library and provides
+ empty_poll APIs. This feature measures how many times empty_polls are
+ executed per core and uses the number of empty polls as a hint for system
+ power management.
+
+ See the :doc:`../prog_guide/power_man` section of the DPDK Programmers
+ Guide document for more information.
+
+* **Added JSON power policy interface for containers.**
+
+ Extended the Power Library and vm_power_manager sample app to allow power
+ policies to be submitted via a FIFO using JSON formatted strings. Previously
+ limited to Virtual Machines, this feature extends power policy functionality
+ to containers and host applications that need to have their cores frequency
+ controlled based on the rules contained in the policy.
+
+* **Added Telemetry API.**
+
+ Added a new telemetry API which allows applications to transparently expose
+ their telemetry in JSON via a UNIX socket. The JSON can be consumed by any
+ Service Assurance agent, such as CollectD.
+
+* **Updated KNI kernel module, rte_kni library, and KNI sample application.**
+
+ Updated the KNI kernel module with a new kernel module parameter,
+ ``carrier=[on|off]`` to allow the user to control the default carrier
+ state of the KNI kernel network interfaces. The default carrier state
+ is now set to ``off``, so the interfaces cannot be used until the
+ carrier state is set to ``on`` via ``rte_kni_update_link`` or
+ by writing ``1`` to ``/sys/devices/virtual/net/<iface>/carrier``.
+ In previous versions the default carrier state was left undefined.
+ See :doc:`../prog_guide/kernel_nic_interface` for more information.
+
+ Also added the new API function ``rte_kni_update_link()`` to allow the user
+ to set the carrier state of the KNI kernel network interface.
+
+ Also added a new command line flag ``-m`` to the KNI sample application to
+ monitor and automatically reflect the physical NIC carrier state to the
+ KNI kernel network interface with the new ``rte_kni_update_link()`` API.
+ See :doc:`../sample_app_ug/kernel_nic_interface` for more information.
+
+* **Added ability to switch queue deferred start flag on testpmd app.**
+
+ Added a console command to testpmd app, giving ability to switch
+ ``rx_deferred_start`` or ``tx_deferred_start`` flag of the specified queue of
+ the specified port. The port must be stopped before the command call in order
+ to reconfigure queues.
+
+* **Add a new sample application for vDPA.**
+
+ The vdpa sample application creates vhost-user sockets by using the
+ vDPA backend. vDPA stands for vhost Data Path Acceleration which utilizes
+ virtio ring compatible devices to serve virtio driver directly to enable
+ datapath acceleration. As vDPA driver can help to set up vhost datapath,
+ this application doesn't need to launch dedicated worker threads for vhost
+ enqueue/dequeue operations.
+
+* **Added cryptodev FIPS validation example application.**
+
+ Added an example application to parse and perform symmetric cryptography
+ computation to the NIST Cryptographic Algorithm Validation Program (CAVP)
+ test vectors.
+
+* **Allow unit test binary to take parameters from the environment.**
+
+ The unit test "test", or "dpdk-test", binary is often called from scripts,
+ which can make passing additional parameters, such as a coremask,
+ difficult. Support has been added to the application to allow it to take
+ additional command-line parameter values from the ``DPDK_TEST_PARAMS``
+ environment variable to make this application easier to use.
+
+
+API Changes
+-----------
+
+* eal: ``rte_memseg_list`` structure now has an additional flag indicating
+ whether the memseg list is externally allocated. This will have implications
+ for any users of memseg-walk-related functions, as they will now have to skip
+ externally allocated segments in most cases if the intent is to only iterate
+ over internal DPDK memory.
+
+ In addition the ``socket_id`` parameter across the entire DPDK has gained
+ additional meaning, as some socket ID's will now be representing externally
+ allocated memory. No changes will be required for existing code as backwards
+ compatibility will be kept, and those who do not use this feature will not
+ see these extra socket ID's. Any new API's must not check socket ID
+ parameters themselves, and must instead leave it to the memory subsystem to
+ decide whether socket ID is a valid one.
+
+* eal: The following devargs functions, which were deprecated in 18.05,
+ were removed in 18.11:
+ ``rte_eal_parse_devargs_str()``, ``rte_eal_devargs_add()``,
+ ``rte_eal_devargs_type_count()``, and ``rte_eal_devargs_dump()``.
+
+* eal: The parameters of the function ``rte_devargs_remove()`` have changed
+ from bus and device names to ``struct rte_devargs``.
+
+* eal: The deprecated functions attach/detach were removed in 18.11.
+ ``rte_eal_dev_attach`` can be replaced by
+ ``rte_dev_probe`` or ``rte_eal_hotplug_add``.
+ ``rte_eal_dev_detach`` can be replaced by
+ ``rte_dev_remove`` or ``rte_eal_hotplug_remove``.
+
+* eal: The scope of ``rte_eal_hotplug_add()``/``rte_dev_probe()``
+ and ``rte_eal_hotplug_remove()``/``rte_dev_remove()`` has been extended.
+ In the multi-process model, they will guarantee that the device is
+ attached or detached on all processes.
+
+* mbuf: The ``__rte_mbuf_raw_free()`` and ``__rte_pktmbuf_prefree_seg()``
+ functions were deprecated since 17.05 and are replaced by
+ ``rte_mbuf_raw_free()`` and ``rte_pktmbuf_prefree_seg()``.
+
+* ethdev: The deprecated functions attach/detach were removed in 18.11.
+ ``rte_eth_dev_attach()`` can be replaced by ``RTE_ETH_FOREACH_MATCHING_DEV``
+ and ``rte_dev_probe()`` or ``rte_eal_hotplug_add()``.
+ ``rte_eth_dev_detach()`` can be replaced by
+ ``rte_dev_remove()`` or ``rte_eal_hotplug_remove()``.
+
+* ethdev: A call to ``rte_eth_dev_release_port()`` has been added in
+ ``rte_eth_dev_close()``. As a consequence, a closed port is freed
+ and seen as invalid because of its state ``RTE_ETH_DEV_UNUSED``.
+ This new behavior is enabled per driver for a migration period.
+
+* A new device flag, ``RTE_ETH_DEV_NOLIVE_MAC_ADDR``, changes the order of
+ actions inside ``rte_eth_dev_start()`` regarding MAC set. Some NICs do not
+ support MAC changes once the port has started and with this new device
+ flag the MAC can be properly configured in any case. This is particularly
+ important for bonding.
+
+* The default behavior of CRC strip offload has changed in this
+ release. Without any specific Rx offload flag, default behavior by a PMD is
+ now to strip CRC. ``DEV_RX_OFFLOAD_CRC_STRIP`` offload flag has been removed.
+ To request keeping CRC, application should set ``DEV_RX_OFFLOAD_KEEP_CRC``
+ Rx offload.
+
+* eventdev: The type of the second parameter to
+ ``rte_event_eth_rx_adapter_caps_get()`` has been changed from uint8_t to
+ uint16_t.
+
+* kni: By default, interface carrier status is ``off`` which means there won't
+ be any traffic. It can be set to ``on`` via ``rte_kni_update_link()`` API or
+ via ``sysfs`` interface: ``echo 1 > /sys/class/net/vEth0/carrier``.
+
+ Note interface should be ``up`` to be able to read/write sysfs interface.
+ When KNI sample application is used, ``-m`` parameter can be used to
+ automatically update the carrier status for the interface.
+
+* kni: When ethtool support is enabled (``CONFIG_RTE_KNI_KMOD_ETHTOOL=y``)
+ ethtool commands ``ETHTOOL_GSET & ETHTOOL_SSET`` are no longer supported for
+ kernels that have ``ETHTOOL_GLINKSETTINGS & ETHTOOL_SLINKSETTINGS`` support.
+ This means ``ethtool "-a|--show-pause", "-s|--change"`` won't work, and
+ ``ethtool <iface>`` output will have less information.
+
+
+ABI Changes
+-----------
+
+* eal: added ``legacy_mem`` and ``single_file_segments`` values to
+ ``rte_config`` structure on account of improving DPDK usability when
+ using either ``--legacy-mem`` or ``--single-file-segments`` flags.
+
+* eal: EAL library ABI version was changed due to previously announced work on
+ supporting external memory in DPDK:
+
+ - Structure ``rte_memseg_list`` now has a new field indicating length
+ of memory addressed by the segment list
+ - Structure ``rte_memseg_list`` now has a new flag indicating whether
+ the memseg list refers to external memory
+ - Structure ``rte_malloc_heap`` now has a new field indicating socket
+ ID the malloc heap belongs to
+ - Structure ``rte_mem_config`` has had its ``malloc_heaps`` array
+ resized from ``RTE_MAX_NUMA_NODES`` to ``RTE_MAX_HEAPS`` value
+ - Structure ``rte_malloc_heap`` now has a ``heap_name`` member
+ - Structure ``rte_eal_memconfig`` has been extended to contain next
+ socket ID for externally allocated segments