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doc: announce ABI change for Tx offload

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This is an ABI change notice for DPDK 17.08 in ethdev
about changes in rte_eth_txmode structure.

Currently Tx offloads are enabled by default, and can be disabled
using ETH_TXQ_FLAGS_NO* flags. This behaviour is not consistent with
the Rx side where the Rx offloads are disabled by default and enabled
according to bit field in rte_eth_rxmode structure.

The proposal is to disable the Tx offloads by default, and provide
a way for the application to enable them in rte_eth_txmode structure.
Besides of making the Tx configuration API more consistent for
applications, PMDs will be able to provide a better out of the
box performance.
Finally, as part of the work, the ETH_TXQ_FLAGS_NO* will
be superseded as well.

Signed-off-by: Shahaf Shuler <shahafs@mellanox.com>
Acked-by: Adrien Mazarguil <adrien.mazarguil@6wind.com>
Acked-by: Jerin Jacob <jerin.jacob@caviumnetworks.com>
Acked-by: Bruce Richardson <bruce.richardson@intel.com>
This commit is contained in:
Shahaf Shuler 2017-05-01 09:58:12 +03:00 committed by Thomas Monjalon
parent 2ee10c8a56
commit 3ea489d2c4
1 changed files with 7 additions and 0 deletions
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7
doc/guides/rel_notes/deprecation.rst
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@ -75,6 +75,13 @@ Deprecation Notices
PKT_RX_QINQ_STRIPPED, that are better described. The old flags and PKT_RX_QINQ_STRIPPED, that are better described. The old flags and
their behavior will be kept until 17.02 and will be removed in 17.05. their behavior will be kept until 17.02 and will be removed in 17.05.
* ethdev: Tx offloads will no longer be enabled by default in 17.08.
Instead, the ``rte_eth_txmode`` structure will be extended with
bit field to enable each Tx offload.
Besides of making the Rx/Tx configuration API more consistent for the
application, PMDs will be able to provide a better out of the box performance.
As part of the work, ``ETH_TXQ_FLAGS_NO*`` will be superseded as well.
* ethdev: the legacy filter API, including * ethdev: the legacy filter API, including
``rte_eth_dev_filter_supported()``, ``rte_eth_dev_filter_ctrl()`` as well ``rte_eth_dev_filter_supported()``, ``rte_eth_dev_filter_ctrl()`` as well
as filter types MACVLAN, ETHERTYPE, FLEXIBLE, SYN, NTUPLE, TUNNEL, FDIR, as filter types MACVLAN, ETHERTYPE, FLEXIBLE, SYN, NTUPLE, TUNNEL, FDIR,