1 .. SPDX-License-Identifier: BSD-3-Clause
2 Copyright 2018 The DPDK contributors
4 ABI and API Deprecation
5 =======================
7 See the :doc:`guidelines document for details of the ABI policy </contributing/versioning>`.
8 API and ABI deprecation notices are to be posted here.
14 * linux: Linux kernel version 3.2 (which is the current minimum required
15 version for the DPDK) is not maintained anymore. Therefore the planned
16 minimum required kernel version for DPDK 19.02 will be the next oldest
17 Long Term Stable (LTS) version which is 3.16, but compatibility for
18 recent distribution kernels will be kept.
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.
23 * eal: function ``rte_bsf64`` in ``rte_bitmap.h`` has been renamed to
24 ``rte_bsf64_safe`` and moved to ``rte_common.h``. A new ``rte_bsf64`` function
25 will be added in the next release in ``rte_common.h`` that follows convention
26 set by existing ``rte_bsf32`` function.
28 * eal: both declaring and identifying devices will be streamlined in v18.11.
29 New functions will appear to query a specific port from buses, classes of
30 device and device drivers. Device declaration will be made coherent with the
31 new scheme of device identification.
32 As such, ``rte_devargs`` device representation will change.
34 - The enum ``rte_devtype`` was used to identify a bus and will disappear.
35 - Functions previously deprecated will change or disappear:
37 + ``rte_eal_devargs_type_count``
39 * pci: Several exposed functions are misnamed.
40 The following functions are deprecated starting from v17.11 and are replaced:
42 - ``eal_parse_pci_BDF`` replaced by ``rte_pci_addr_parse``
43 - ``eal_parse_pci_DomBDF`` replaced by ``rte_pci_addr_parse``
44 - ``rte_eal_compare_pci_addr`` replaced by ``rte_pci_addr_cmp``
46 * dpaa2: removal of ``rte_dpaa2_memsegs`` structure which has been replaced
47 by a pa-va search library. This structure was earlier being used for holding
48 memory segments used by dpaa2 driver for faster pa->va translation. This
49 structure would be made internal (or removed if all dependencies are cleared)
52 * mbuf: The opaque ``mbuf->hash.sched`` field will be updated to support generic
53 definition in line with the ethdev TM and MTR APIs. Currently, this field
54 is defined in librte_sched in a non-generic way. The new generic format
55 will contain: queue ID, traffic class, color. Field size will not change.
57 * sched: Some API functions will change prototype due to the above
58 deprecation note for mbuf->hash.sched, e.g. ``rte_sched_port_pkt_write()``
59 and ``rte_sched_port_pkt_read()`` will likely have an additional parameter
60 of type ``struct rte_sched_port``.
62 * mbuf: the macro ``RTE_MBUF_INDIRECT()`` will be removed in v18.08 or later and
63 replaced with ``RTE_MBUF_CLONED()`` which is already added in v18.05. As
64 ``EXT_ATTACHED_MBUF`` is newly introduced in v18.05, ``RTE_MBUF_INDIRECT()``
65 can no longer be mutually exclusive with ``RTE_MBUF_DIRECT()`` if the new
66 experimental API ``rte_pktmbuf_attach_extbuf()`` is used. Removal of the macro
67 is to fix this semantic inconsistency.
69 * ethdev: the legacy filter API, including
70 ``rte_eth_dev_filter_supported()``, ``rte_eth_dev_filter_ctrl()`` as well
71 as filter types MACVLAN, ETHERTYPE, FLEXIBLE, SYN, NTUPLE, TUNNEL, FDIR,
72 HASH and L2_TUNNEL, is superseded by the generic flow API (rte_flow) in
73 PMDs that implement the latter.
74 Target release for removal of the legacy API will be defined once most
75 PMDs have switched to rte_flow.
77 * ethdev: Maximum and minimum MTU values vary between hardware devices. In
78 hardware agnostic DPDK applications access to such information would allow
79 a more accurate way of validating and setting supported MTU values on a per
80 device basis rather than using a defined default for all devices. To
81 resolve this, the following members will be added to ``rte_eth_dev_info``.
82 Note: these can be added to fit a hole in the existing structure for amd64
83 but not for 32-bit, as such ABI change will occur as size of the structure
86 - Member ``uint16_t min_mtu`` the minimum MTU allowed.
87 - Member ``uint16_t max_mtu`` the maximum MTU allowed.
89 * security: New field ``uint64_t opaque_data`` is planned to be added into
90 ``rte_security_session`` structure. That would allow upper layer to easily
91 associate/de-associate some user defined data with the security session.
93 * cryptodev: several API and ABI changes are planned for rte_cryptodev
96 - The size and layout of ``rte_cryptodev_sym_session`` will change
97 to fix existing issues.
98 - The size and layout of ``rte_cryptodev_qp_conf`` and syntax of
99 ``rte_cryptodev_queue_pair_setup`` will change to to allow to use
100 two different mempools for crypto and device private sessions.