1.. SPDX-License-Identifier: BSD-3-Clause 2 Copyright 2018 The DPDK contributors 3 4ABI and API Deprecation 5======================= 6 7See the guidelines document for details of the :doc:`ABI policy 8<../contributing/abi_policy>`. API and ABI deprecation notices are to be posted 9here. 10 11Deprecation Notices 12------------------- 13 14* meson: The minimum supported version of meson for configuring and building 15 DPDK will be increased to v0.47.1 (from 0.41) from DPDK 19.05 onwards. For 16 those users with a version earlier than 0.47.1, an updated copy of meson 17 can be got using the ``pip``, or ``pip3``, tool for downloading python 18 packages. 19 20* kvargs: The function ``rte_kvargs_process`` will get a new parameter 21 for returning key match count. It will ease handling of no-match case. 22 23* eal: The function ``rte_eal_remote_launch`` will return new error codes 24 after read or write error on the pipe, instead of calling ``rte_panic``. 25 26* eal: both declaring and identifying devices will be streamlined in v18.11. 27 New functions will appear to query a specific port from buses, classes of 28 device and device drivers. Device declaration will be made coherent with the 29 new scheme of device identification. 30 As such, ``rte_devargs`` device representation will change. 31 32 - The enum ``rte_devtype`` was used to identify a bus and will disappear. 33 - Functions previously deprecated will change or disappear: 34 35 + ``rte_eal_devargs_type_count`` 36 37* eal: The ``rte_logs`` struct and global symbol will be made private to 38 remove it from the externally visible ABI and allow it to be updated in the 39 future. 40 41* dpaa2: removal of ``rte_dpaa2_memsegs`` structure which has been replaced 42 by a pa-va search library. This structure was earlier being used for holding 43 memory segments used by dpaa2 driver for faster pa->va translation. This 44 structure would be made internal (or removed if all dependencies are cleared) 45 in future releases. 46 47* mempool: starting from v20.05, the API of rte_mempool_populate_iova() 48 and rte_mempool_populate_virt() will change to return 0 instead 49 of -EINVAL when there is not enough room to store one object. The ABI 50 will be preserved until 20.11. 51 52* ethdev: the legacy filter API, including 53 ``rte_eth_dev_filter_supported()``, ``rte_eth_dev_filter_ctrl()`` as well 54 as filter types MACVLAN, ETHERTYPE, FLEXIBLE, SYN, NTUPLE, TUNNEL, FDIR, 55 HASH and L2_TUNNEL, is superseded by the generic flow API (rte_flow) in 56 PMDs that implement the latter. 57 Target release for removal of the legacy API will be defined once most 58 PMDs have switched to rte_flow. 59 60* ethdev: Update API functions returning ``void`` to return ``int`` with 61 negative errno values to indicate various error conditions (e.g. 62 invalid port ID, unsupported operation, failed operation): 63 64 - ``rte_eth_dev_stop`` 65 - ``rte_eth_dev_close`` 66 67* ethdev: New offload flags ``DEV_RX_OFFLOAD_FLOW_MARK`` will be added in 19.11. 68 This will allow application to enable or disable PMDs from updating 69 ``rte_mbuf::hash::fdir``. 70 This scheme will allow PMDs to avoid writes to ``rte_mbuf`` fields on Rx and 71 thereby improve Rx performance if application wishes do so. 72 In 19.11 PMDs will still update the field even when the offload is not 73 enabled. 74 75* cryptodev: support for using IV with all sizes is added, J0 still can 76 be used but only when IV length in following structs ``rte_crypto_auth_xform``, 77 ``rte_crypto_aead_xform`` is set to zero. When IV length is greater or equal 78 to one it means it represents IV, when is set to zero it means J0 is used 79 directly, in this case 16 bytes of J0 need to be passed. 80 81* sched: To allow more traffic classes, flexible mapping of pipe queues to 82 traffic classes, and subport level configuration of pipes and queues 83 changes will be made to macros, data structures and API functions defined 84 in "rte_sched.h". These changes are aligned to improvements suggested in the 85 RFC https://mails.dpdk.org/archives/dev/2018-November/120035.html. 86 87* metrics: The function ``rte_metrics_init`` will have a non-void return 88 in order to notify errors instead of calling ``rte_exit``. 89 90* power: ``rte_power_set_env`` function will no longer return 0 on attempt 91 to set new power environment if power environment was already initialized. 92 In this case the function will return -1 unless the environment is unset first 93 (using ``rte_power_unset_env``). Other function usage scenarios will not change. 94