X-Git-Url: http://git.droids-corp.org/?a=blobdiff_plain;f=doc%2Fguides%2Frel_notes%2Fdeprecation.rst;h=4249aab8335d00667a7e34102a869e1f60c51d46;hb=da5350ef29afd35c1adabe76f60832f3092269ad;hp=1ff2b521dfd3229941b8990ef73f5011cc23bc4d;hpb=2717246ecd7d27125a346a2c5c55b53a9c251a93;p=dpdk.git diff --git a/doc/guides/rel_notes/deprecation.rst b/doc/guides/rel_notes/deprecation.rst index 1ff2b521df..4249aab833 100644 --- a/doc/guides/rel_notes/deprecation.rst +++ b/doc/guides/rel_notes/deprecation.rst @@ -1,3 +1,6 @@ +.. SPDX-License-Identifier: BSD-3-Clause + Copyright 2018 The DPDK contributors + ABI and API Deprecation ======================= @@ -8,17 +11,19 @@ API and ABI deprecation notices are to be posted here. Deprecation Notices ------------------- -* eal: DPDK runtime configuration file (located at - ``/var/run/._config``) will be moved. The new path will be as follows: +* meson: The minimum supported version of meson for configuring and building + DPDK will be increased to v0.47.1 (from 0.41) from DPDK 19.05 onwards. For + those users with a version earlier than 0.47.1, an updated copy of meson + can be got using the ``pip``, or ``pip3``, tool for downloading python + packages. + +* kvargs: The function ``rte_kvargs_process`` will get a new parameter + for returning key match count. It will ease handling of no-match case. - - if DPDK is running as root, path will be set to - ``/var/run/dpdk//config`` - - if DPDK is not running as root and $XDG_RUNTIME_DIR is set, path will be set - to ``$XDG_RUNTIME_DIR/dpdk//config`` - - if DPDK is not running as root and $XDG_RUNTIME_DIR is not set, path will be - set to ``/tmp/dpdk//config`` +* eal: The function ``rte_eal_remote_launch`` will return new error codes + after read or write error on the pipe, instead of calling ``rte_panic``. -* eal: both declaring and identifying devices will be streamlined in v18.08. +* eal: both declaring and identifying devices will be streamlined in v18.11. New functions will appear to query a specific port from buses, classes of device and device drivers. Device declaration will be made coherent with the new scheme of device identification. @@ -28,41 +33,25 @@ Deprecation Notices - Functions previously deprecated will change or disappear: + ``rte_eal_devargs_type_count`` - + ``rte_eal_devargs_parse`` will change its format and use. - -* pci: Several exposed functions are misnamed. - The following functions are deprecated starting from v17.11 and are replaced: - - - ``eal_parse_pci_BDF`` replaced by ``rte_pci_addr_parse`` - - ``eal_parse_pci_DomBDF`` replaced by ``rte_pci_addr_parse`` - - ``rte_eal_compare_pci_addr`` replaced by ``rte_pci_addr_cmp`` - -* eal: a new set of mbuf mempool ops name APIs for user, platform and best - mempool names have been defined in ``rte_mbuf`` in v18.02. The uses of - ``rte_eal_mbuf_default_mempool_ops`` shall be replaced by - ``rte_mbuf_best_mempool_ops``. - The following function is deprecated since 18.05, and will be removed - in 18.08: - - - ``rte_eal_mbuf_default_mempool_ops`` - -* mbuf: The opaque ``mbuf->hash.sched`` field will be updated to support generic - definition in line with the ethdev TM and MTR APIs. Currently, this field - is defined in librte_sched in a non-generic way. The new generic format - will contain: queue ID, traffic class, color. Field size will not change. - -* mbuf: the macro ``RTE_MBUF_INDIRECT()`` will be removed in v18.08 or later and - replaced with ``RTE_MBUF_CLONED()`` which is already added in v18.05. As - ``EXT_ATTACHED_MBUF`` is newly introduced in v18.05, ``RTE_MBUF_INDIRECT()`` - can no longer be mutually exclusive with ``RTE_MBUF_DIRECT()`` if the new - experimental API ``rte_pktmbuf_attach_extbuf()`` is used. Removal of the macro - is to fix this semantic inconsistency. - -* ethdev: In v18.11 ``DEV_RX_OFFLOAD_CRC_STRIP`` offload flag will be removed, default - behavior without any flag will be changed to CRC strip. - To keep CRC ``DEV_RX_OFFLOAD_KEEP_CRC`` flag is required. - ``KEEP_CRC``: Keep CRC in packet - No flag: Strip CRC from packet + +* eal: The ``rte_logs`` struct and global symbol will be made private to + remove it from the externally visible ABI and allow it to be updated in the + future. + +* vfio: removal of ``rte_vfio_dma_map`` and ``rte_vfio_dma_unmap`` APIs which + have been replaced with ``rte_dev_dma_map`` and ``rte_dev_dma_unmap`` + functions. The due date for the removal targets DPDK 20.02. + +* dpaa2: removal of ``rte_dpaa2_memsegs`` structure which has been replaced + by a pa-va search library. This structure was earlier being used for holding + memory segments used by dpaa2 driver for faster pa->va translation. This + structure would be made internal (or removed if all dependencies are cleared) + in future releases. + +* ethdev: The function ``rte_eth_dev_count`` will be removed in DPDK 20.02. + It is replaced by the function ``rte_eth_dev_count_avail``. + If the intent is to iterate over ports, ``RTE_ETH_FOREACH_*`` macros + are better port iterators. * ethdev: the legacy filter API, including ``rte_eth_dev_filter_supported()``, ``rte_eth_dev_filter_ctrl()`` as well @@ -72,17 +61,57 @@ Deprecation Notices Target release for removal of the legacy API will be defined once most PMDs have switched to rte_flow. -* pdump: As we changed to use generic IPC, some changes in APIs and structure - are expected in subsequent release. - - - ``rte_pdump_set_socket_dir`` will be removed; - - The parameter, ``path``, of ``rte_pdump_init`` will be removed; - - The enum ``rte_pdump_socktype`` will be removed. - -* cryptodev: The following changes will be made in the library - for 18.08: - - - Functions ``rte_cryptodev_queue_pair_attach_sym_session()`` and - ``rte_cryptodev_queue_pair_dettach_sym_session()`` will be deprecated from - 18.05 and removed in 18.08, as there are no drivers doing anything useful - with them. +* ethdev: Update API functions returning ``void`` to return ``int`` with + negative errno values to indicate various error conditions (e.g. + invalid port ID, unsupported operation, failed operation): + + - ``rte_eth_dev_stop`` + - ``rte_eth_dev_close`` + +* ethdev: New offload flags ``DEV_RX_OFFLOAD_RSS_HASH`` and + ``DEV_RX_OFFLOAD_FLOW_MARK`` will be added in 19.11. + This will allow application to enable or disable PMDs from updating + ``rte_mbuf::hash::rss`` and ``rte_mbuf::hash::fdir`` respectively. + This scheme will allow PMDs to avoid writes to ``rte_mbuf`` fields on Rx and + thereby improve Rx performance if application wishes do so. + In 19.11 PMDs will still update the fields even when the offloads are not + enabled. + +* ethdev: New function ``rte_eth_dev_set_supported_ptypes`` will be added in + 19.11. + This will allow application to request PMD to set specific ptypes defined + through ``rte_eth_dev_set_supported_ptypes`` in ``rte_mbuf::packet_type``. + If application doesn't want any ptype information it can call + ``rte_eth_dev_set_supported_ptypes(ethdev_id, RTE_PTYPE_UNKNOWN)`` and PMD + will set ``rte_mbuf::packet_type`` to ``0``. + If application doesn't call ``rte_eth_dev_set_supported_ptypes`` PMD can + return ``rte_mbuf::packet_type`` with ``rte_eth_dev_get_supported_ptypes``. + If application is interested only in L2/L3 layer, it can inform the PMD + to update ``rte_mbuf::packet_type`` with L2/L3 ptype by calling + ``rte_eth_dev_set_supported_ptypes(ethdev_id, RTE_PTYPE_L2_MASK | RTE_PTYPE_L3_MASK)``. + This scheme will allow PMDs to avoid lookup to internal ptype table on Rx and + thereby improve Rx performance if application wishes do so. + +* ethdev: New 32-bit fields may be added for maximum LRO session size, in + struct ``rte_eth_dev_info`` for the port capability and in struct + ``rte_eth_rxmode`` for the port configuration. + +* cryptodev: support for using IV with all sizes is added, J0 still can + be used but only when IV length in following structs ``rte_crypto_auth_xform``, + ``rte_crypto_aead_xform`` is set to zero. When IV length is greater or equal + to one it means it represents IV, when is set to zero it means J0 is used + directly, in this case 16 bytes of J0 need to be passed. + +* sched: To allow more traffic classes, flexible mapping of pipe queues to + traffic classes, and subport level configuration of pipes and queues + changes will be made to macros, data structures and API functions defined + in "rte_sched.h". These changes are aligned to improvements suggested in the + RFC https://mails.dpdk.org/archives/dev/2018-November/120035.html. + +* metrics: The function ``rte_metrics_init`` will have a non-void return + in order to notify errors instead of calling ``rte_exit``. + +* power: ``rte_power_set_env`` function will no longer return 0 on attempt + to set new power environment if power environment was already initialized. + In this case the function will return -1 unless the environment is unset first + (using ``rte_power_unset_env``). Other function usage scenarios will not change.