23/05/2022 16:20, xuan.d...@intel.com: > From: Xuan Ding <xuan.d...@intel.com> > > RTE_ETH_RX_OFFLOAD_HEADER_SPLIT offload was introduced some time ago to > substitute bit-field header_split in struct rte_eth_rxmode. It allows > to enable header split offload with the header size controlled using > split_hdr_size in the same structure. > > Right now, no single PMD actually supports RTE_ETH_RX_OFFLOAD_HEADER_SPLIT > with above definition. Many examples and test apps initialize the field > to 0 explicitly. The most of drivers simply ignore split_hdr_size since > the offload is not advertised, but some double-check that its value is 0. > > So the RTE_ETH_RX_OFFLOAD_HEADER_SPLIT and split_header_size field > will be removed in DPDK 22.11. > > Signed-off-by: Xuan Ding <xuan.d...@intel.com> > --- > doc/guides/rel_notes/deprecation.rst | 4 ++++ > 1 file changed, 4 insertions(+) > > diff --git a/doc/guides/rel_notes/deprecation.rst > b/doc/guides/rel_notes/deprecation.rst > index 4e5b23c53d..b8114f29ed 100644 > --- a/doc/guides/rel_notes/deprecation.rst > +++ b/doc/guides/rel_notes/deprecation.rst > @@ -125,3 +125,7 @@ Deprecation Notices > applications should be updated to use the ``dmadev`` library instead, > with the underlying HW-functionality being provided by the ``ioat`` or > ``idxd`` dma drivers > + > +* ethdev: After bit-field header split was removed, the > ``RTE_ETH_RX_OFFLOAD_HEADER_SPLIT`` > +offload and the ``split_hdr_size`` field in structure ``rte_eth_rxmode`` to > enable header > +split offload are not supported in any PMDs. They will be removed in DPDK > 22.11.
It would have been good to talk about rte_eth_rxseg_split which is similar and configured per-queue.
