numam-dpdk/doc/guides/rel_notes/release_2_2.rst

DPDK Release 2.2
================

New Features
------------

* **Introduce ARMv7 and ARMv8 architectures**

  * It is now possible to build DPDK for the ARMv7 and ARMv8 platforms.
  * ARMv7 can be tested with virtual PMD drivers.
  * ARMv8 can be tested with virtual and physical PMD drivers.

* **Enabled freeing of ring.**

  New function rte_ring_free() allows the user to free a ring
  if it was created with rte_ring_create().

* **Added keepalive support to EAL and example application.**

* **Added experimental cryptodev API**

  The cryptographic processing of packet is provided as a preview
  with two drivers for:

  * Intel QuickAssist devices
  * Intel AES-NI multi-buffer library

  Due to its experimental state, the API may change without prior notice.

* **Added ethdev API to support IEEE1588.**

  Added functions to read, write and adjust system time in the NIC.

* **Extended Statistics**

  Define extended statistics naming scheme to store metadata in the name
  string name of each statistic, refer to the Extended Statistics section
  of the programmers guide. Implemented the extended stats API for these
  PMDs:

  * igb
  * igbvf
  * i40e
  * i40evf
  * fm10k
  * virtio

* **Added API in ethdev to retrieve RX/TX queue information.**

  *  Add the ability for the upper layer to query RX/TX queue information.
  *  Add into rte_eth_dev_info new fields to represent information about
     RX/TX descriptors min/max/align numbers per queue for the device.

* **Added RSS dynamic configuration to bonding.**

* **Updated the e1000 base driver.**

  The e1000 base driver was updated with several features including the
  following:

  * Add new i218 devices
  * Allow both ULP and EEE in Sx state
  * Initialize 88E1543 (Marvell 1543) PHY
  * Add flags to set EEE advertisement modes
  * Support inverted format ETrackId
  * Add bit to disable packetbuffer read
  * Add defaults for i210 Rx/Tx PBSIZE
  * Check more errors for ESB2 init and reset
  * Check more NVM read errors
  * Return code after setting receive address register
  * Remove all NAHUM6LP_HW tags

* **Added e1000 Rx interrupt support.**

* **Added igb TSO support for both PF and VF.**

* **RSS enhancement on Intel x550 NIC**

  * Support 512 entries RSS redirection table.
  * Support per VF RSS redirection table.

* **Flow director enhancement on Intel x550 NIC**

  * Add 2 new flow director modes on x550.
  * One is MAC VLAN mode, the other is tunnel mode.

* **Updated the i40e base driver.**

  The i40e base driver was updated with several changes including the
  following:

  *  Added promiscuous on VLAN support
  *  Added a workaround to drop all flow control frames
  *  Added VF capabilities to virtual channel interface
  *  Added Tx Scheduling related AQ commands
  *  Added additional PCTYPES supported for FortPark RSS
  *  Added parsing for CEE DCBX TLVs
  *  Added FortPark specific registers
  *  Added AQ functions to handle RSS Key and LUT programming
  *  Increased pf reset max loop limit

* **Added i40e vector RX/TX.**

* **Added i40e Rx interrupt support.**

* **Added i40e flow control support.**

* **Added DCB support to i40e PF driver.**

* **Added RSS/FD input set granularity on Intel X710/XL710.**

* **Added different GRE key length for input set on Intel X710/XL710.**

* **Added flow director support in i40e VF.**

* **Added i40e support of early X722 series.**

  Add early X722 support for evaluation only, as the hardware is in A0.

* **Added fm10k vector RX/TX.**

* **Added fm10k TSO support for both PF and VF.**

* **Added fm10k VMDQ support.**

* **New NIC Boulder Rapid support.**

  Boulder Rapid is a new NIC of Intel's fm10k family.

* **Enhanced support for the Chelsio CXGBE driver.**

  *  Added support for Jumbo Frames.
  *  Optimize forwarding performance for Chelsio T5 40GbE cards.

* **Improved enic Tx packet rate.**

  Reduced frequency of Tx tail pointer updates to the NIC.

* **Added support for link status interrupts in mlx4.**

* **Added partial support (TX only) for secondary processes in mlx4.**

* **Added support for Mellanox ConnectX-4 adapters (mlx5).**

  The mlx5 poll-mode driver implements support for Mellanox ConnectX-4 EN
  and Mellanox ConnectX-4 Lx EN families of 10/25/40/50/100 Gb/s adapters.

  Like mlx4, this PMD is only available for Linux and is disabled by default
  due to external dependencies (libibverbs and libmlx5).

* **Added driver for Netronome nfp-6xxx card.**

  Support for using Netronome nfp-6xxx with PCI VFs.

* **Added virtual szedata2 driver for COMBO cards.**

  Added virtual PMD for COMBO-100G and COMBO-80G cards.
  PMD is disabled in default configuration.

* **Enhanced support for virtio driver.**

  * Virtio ring layout optimization (fixed avail ring)
  * Vector RX
  * Simple TX

* **Added vhost-user multiple queue support.**

* **Added port hotplug support to vmxnet3.**

* **Added port hotplug support to xenvirt.**

* **Added ethtool shim and sample application.**

* **Added experimental performance thread example application.**

  The application demonstrates L3 fowarding with different threading
  models: pthreads, cgroups, or lighweight threads. The example inludes
  a simple cooperative scheduler.

  Due to its experimental state this application may change without notice.
  The application is supported only for Linux x86_64.


Resolved Issues
---------------

EAL
~~~

* **eal/linux: Fixed epoll timeout.**

  Fixed issue where the ``rte_epoll_wait()`` function didn't return when the
  underlying call to ``epoll_wait()`` timed out.


Drivers
~~~~~~~

* **e1000/base: Synchronize PHY interface on non-ME systems.**

  On power up, the MAC - PHY interface needs to be set to PCIe, even if
  cable is disconnected.  In ME systems, the ME handles this on exit from
  Sx(Sticky mode) state. In non-ME, the driver handles it. Add a check
  for non-ME system to the driver code that handles that.

* **e1000/base: Increase timeout of reset check.**

  Previously, in check_reset_block RSPCIPHY was polled for 100 ms before
  determining that the ME veto is set. It's not enough. It need to be increased
  to 300 ms.

* **e1000/base: Disable IPv6 extension header parsing on 82575.**

  Disable IPv6 options as per hardware limitation.

* **e1000/base: Prevent ULP flow if cable connected.**

  Enabling ulp on link down when cable is connect caused an infinite
  loop of linkup/down indications in the NDIS driver.
  After discussed, correct flow is to enable ULP only when cable is
  disconnected.

* **e1000/base: Support different EEARBC for i210.**

  EEARBC has changed on i210. It means EEARBC has a different address on
  i210 than on other NICs. So, add a new entity named EEARBC_I210 to the
  register list and make sure the right one is being used on i210.

* **e1000/base: Fix K1 configuration**

  This patch is for the following updates to the K1 configurations:
  Tx idle period for entering K1 should be 128 ns.
  Minimum Tx idle period in K1 should be 256 ns.

* **e1000/base: Fix link detect flow**

  In case that auto-negotiate is not enabled, call
  e1000_setup_copper_link_generic instead of e1000_phy_setup_autoneg.

* **e1000/base: Fix link check for i354 M88E1112 PHY**

  e1000_check_for_link_media_swap() is supposed to check PHY page 0 for
  copper and PHY page 1 for "other" (fiber) link. We switched back from
  page 1 to page 0 too soon, before e1000_check_for_link_82575() is
  executed and we were never finding link on fiber (other).

  If the link is copper, as the M88E1112 page address is set to 1, it should be
  set back to 0 before checking this link.

* **e1000/base: Fix beacon duration for i217**

  Fix for I217 Packet Loss issue - The Management Engine sets the FEXTNVM4
  Beacon Duration incorrectly.  This fix ensures that the correct value will
  always be set. Correct value for this field is 8 usec.

* **e1000/base: Fix TIPG for non 10 half duplex mode**

  TIPG value is increased when setting speed to 10 half to prevent
  packet loss. However, it was never decreased again when speed
  changes. This caused performance issues in the NDIS driver.
  Fix this to restore TIPG to default value on non 10 half.

* **e1000/base: Fix reset of DH89XXCC SGMII**

  For DH89XXCC_SGMII, write flush leaves registers of this device trashed
  (0xFFFFFFFF). Add check for this device.
  Also, after both for Port SW Reset and Device Reset case, platform should
  wait at least 3ms before reading any registers. Since waiting is
  conditionally executed only for Device Reset - remove the condition.

* **e1000/base: Fix redundant PHY power down for i210**

  Bit 11 of PHYREG 0 is used to power down PHY. The use of PHYREG 16 is
  unnecessary any more.

* **e1000/base: fix jumbo frame CRC failures**

  Change the value of register 776.20[11:2] for jumbo mode from 0x1A to 0x1F.
  This is to enlarge the gap between read and write pointers in the TX Fifo.
  And replace the magic number with a macro by the way.

* **e1000/base: Fix link flap on 82579**

  Several customers have reported a link flap issue on 82579. The symptoms
  are random and intermittent link losses when 82579 is connected to specific
  switches. Issue has been root caused as interoperability problem between
  the NIC and at least some Broadcom PHYs in the Energy Efficient Ethernet
  wake mechanism.
  To fix the issue, we are disabling the Phase Locked Loop shutdown in 100M
  Low Power Idle. This solution will cause an increase of power in 100M EEE
  link. It may cost additional 28mW in this specific mode.

* **igb: Fixed IEEE1588 frame identification in I210.**

  Fixed issue where the flag PKT_RX_IEEE1588_PTP was not being set
  in Intel I210 NIC, as EtherType in RX descriptor is in bits 8:10 of
  Packet Type and not in the default bits 0:2.

* **igb: Fixed VF start with PF stopped.**

  VF needs the PF interrupt support initialized even if not started.

* **igb: Fixed VF MAC address when using with DPDK PF.**

  Assign a random MAC address in VF when not assigned by PF.

* **ixgbe: Fixed issue with X550 DCB.**

  Fixed a DCB issue with x550 where for 8 TCs (Traffic Classes), if a packet
  with user priority 6 or 7 was injected to the NIC, then the NIC would only
  put 3 packets into the queue. There was also a similar issue for 4 TCs.

* **ixgbe: Removed burst size restriction of vector RX.**

  Fixed issue where a burst size less than 32 didn't receive anything.

* **ixgbe: Fixed VF start with PF stopped.**

  VF needs the PF interrupt support initialized even if not started.

* **ixgbe: Fixed TX hang when RS distance exceeds HW limit.**

  Fixed an issue when TX queue can hang when a lot of highly fragmented
  packets have to be sent.
  As part of that fix, tx_rs_thresh for ixgbe PMD is not allowed to be greater
  then to 32 to comply with HW restrictions.

* **i40e: Fixed base driver allocation when not using first numa node.**

  Fixed i40e issue that occurred when a DPDK application didn't initialize
  ports if memory wasn't available on socket 0.

* **i40e: Fixed maximum of 64 queues per port.**

  Fixed the issue in i40e of cannot supporting more than 64 queues per port,
  though hardware actually supports that. The real number of queues may vary,
  as long as the total number of queues used in PF, VFs, VMDq and FD does not
  exceeds the hardware maximum.

* **i40e: Fixed statistics of packets.**

  Added discarding packets on VSI to the stats and rectify the old statistics.

* **i40e: Fixed issue of not freeing memzone.**

  Fixed the issue of not freeing memzone in the call to free the memory for
  adminq DMA.

* **mlx: Fixed driver loading.**

  The mlx drivers were unable to load when built as a shared library,
  due to a missing symbol in mempool library.

* **mlx4: Performance improvements.**

  Fixed bugs in TX and RX flows that improves mlx4 performance.

* **mlx4: Fixed Tx loss after initialization.**

* **mlx4:  Fixed scattered Tx with too many segments.**

* **mlx4: Fixed memory registration for indirect mbuf data.**

* **vhost: Fixed Qemu shutdown.**

  Fixed issue with libvirt ``virsh destroy`` not killing the VM.

* **virtio: Fixed crash after changing link state.**

  Fixed io permission in the interrupt handler.

* **virtio: Fixed crash when releasing queue.**

  Fixed issue when releasing null control queue.


Libraries
~~~~~~~~~

* **hash: Fixed memory allocation of Cuckoo Hash key table.**

  Fixed issue where an incorrect Cuckoo Hash key table size could be
  calculated limiting the size to 4GB.

* **hash: Fixed incorrect lookup if key is all zero.**

  Fixed issue in hash library that occurred if an all zero
  key was not added in the table and the key was looked up,
  resulting in an incorrect hit.

* **hash: Fixed thread scaling by reducing contention.**

  Fixed issue in hash library where, using multiple cores with
  hardware transactional memory support, thread scaling did not work,
  due to the global ring that is shared by all cores.


Examples
~~~~~~~~

* **l3fwd: Fixed crash with IPv6.**

* **vhost_xen: Fixed compile error.**


Other
~~~~~

* This release drops compatibility with Linux kernel 2.6.33. The minimum
  kernel requirement is now 2.6.34.


Known Issues
------------

* Some drivers do not fill the packet type when receiving.
  As the l3fwd example application requires this info, the i40e vector
  driver must be disabled to benefit of the packet type with i40e.

* **Mellanox PMDs (mlx4 & mlx5):**

  * PMDs do not support DPDK integrated shared library.

  * There is performance degradation for small packets when PMD
    is compiled with SGE_WR_N = 4 compared to the performance when SGE_WR_N = 1.
    If scattered packets are not used it is recomended
    to compile PMD with SGE_WR_N = 1.

  * When a Multicast or Broadcast packet is sent to the SR-IOV mlx4 VF,
    it is returned back to the port.


API Changes
-----------

* The deprecated flow director API is removed.
  It was replaced by rte_eth_dev_filter_ctrl().

* The dcb_queue is renamed to dcb_tc in following dcb configuration
  structures: rte_eth_dcb_rx_conf, rte_eth_dcb_tx_conf,
  rte_eth_vmdq_dcb_conf, rte_eth_vmdq_dcb_tx_conf.

* The rte_eth_rx_queue_count() function now returns "int" instead of "uint32_t"
  to allow the use of negative values as error codes on return.

* The function rte_eal_pci_close_one() is removed.
  It was replaced by rte_eal_pci_detach().

* The deprecated ACL API ipv4vlan is removed.

* The deprecated hash function rte_jhash2() is removed.
  It was replaced by rte_jhash_32b().

* The deprecated KNI functions are removed:
  rte_kni_create(), rte_kni_get_port_id() and rte_kni_info_get().

* The deprecated ring PMD functions are removed:
  rte_eth_ring_pair_create() and rte_eth_ring_pair_attach().

* The devargs union field virtual is renamed to virt for C++ compatibility.

ABI Changes
-----------

* The EAL and ethdev structures rte_intr_handle and rte_eth_conf were changed
  to support Rx interrupt. It was already done in 2.1 for CONFIG_RTE_NEXT_ABI.

* The ethdev flow director entries for SCTP were changed.
  It was already done in 2.1 for CONFIG_RTE_NEXT_ABI.

* The ethdev flow director structure rte_eth_fdir_flow_ext structure is changed.
  New fields are added to support flow director filtering in VF.

* The size of the ethdev structure rte_eth_hash_filter_info is changed
  by adding a new element rte_eth_input_set_conf in an union.

* The new fields rx_desc_lim and tx_desc_lim are added into rte_eth_dev_info
  structure.

* For debug builds, the functions rte_eth_rx_burst(), rte_eth_tx_burst()
  rte_eth_rx_descriptor_done() and rte_eth_rx_queue_count() will
  no longer be separate functions in the DPDK libraries. Instead, they will
  only be present in the rte_ethdev.h header file.

* The maximum number of queues per port CONFIG_RTE_MAX_QUEUES_PER_PORT is
  increased to 1024.

* The mbuf structure was changed to support unified packet type.
  It was already done in 2.1 for CONFIG_RTE_NEXT_ABI.

* The dummy malloc library is removed. The content was moved into EAL in 2.1.

* The LPM structure is changed. The deprecated field mem_location is removed.

* librte_table LPM: A new parameter to hold the table name will be added to
  the LPM table parameter structure.

* librte_table hash: The key mask parameter is added to the hash table
  parameter structure for 8-byte key and 16-byte key extendible bucket
  and LRU tables.

* librte_port: Macros to access the packet meta-data stored within the packet
  buffer has been adjusted to cover the packet mbuf structure.

* librte_cfgfile: Allow longer names and values by increasing the constants
  CFG_NAME_LEN and CFG_VALUE_LEN to 64 and 256 respectively.

* vhost: a new field enabled is added to the vhost_virtqueue structure.

* vhost: a new field virt_qp_nb is added to virtio_net structure, and the
  virtqueue field is moved to the end of virtio_net structure.

* vhost: a new operation vring_state_changed is added to virtio_net_device_ops
  structure.

* vhost: a few spaces are reserved both at vhost_virtqueue and virtio_net
  structure for future extension.


Shared Library Versions
-----------------------

The libraries prepended with a plus sign were incremented in this version.

.. code-block:: diff

   + libethdev.so.2
   + librte_acl.so.2
   + librte_cfgfile.so.2
     librte_cmdline.so.1
     librte_distributor.so.1
   + librte_eal.so.2
   + librte_hash.so.2
     librte_ip_frag.so.1
     librte_ivshmem.so.1
     librte_jobstats.so.1
   + librte_kni.so.2
     librte_kvargs.so.1
   + librte_lpm.so.2
   + librte_mbuf.so.2
     librte_mempool.so.1
     librte_meter.so.1
   + librte_pipeline.so.2
     librte_pmd_bond.so.1
   + librte_pmd_ring.so.2
   + librte_port.so.2
     librte_power.so.1
     librte_reorder.so.1
     librte_ring.so.1
     librte_sched.so.1
   + librte_table.so.2
     librte_timer.so.1
   + librte_vhost.so.2