> -----Original Message----- > From: dev [mailto:dev-bounces at dpdk.org] On Behalf Of Jingjing Wu > Sent: Tuesday, September 6, 2016 10:17 AM > To: Mcnamara, John <john.mcnamara at intel.com> > Cc: dev at dpdk.org; Wu, Jingjing <jingjing.wu at intel.com>; Zhang, Helin > <helin.zhang at intel.com> > Subject: [dpdk-dev] [PATCH] doc: add limitations for i40e PMD > > This patch adds "Limitations or Known issues" section for i40e PMD, including > two items: > 1. MPLS packet classification on X710/XL710 2. 16 Byte Descriptor cannot be > used on DPDK VF > > Signed-off-by: Jingjing Wu <jingjing.wu at intel.com> > --- > doc/guides/nics/i40e.rst | 33 +++++++++++++++++++++++++++++++++ > 1 file changed, 33 insertions(+) > > diff --git a/doc/guides/nics/i40e.rst b/doc/guides/nics/i40e.rst index > 4d12b10..6df0f7a 100644 > --- a/doc/guides/nics/i40e.rst > +++ b/doc/guides/nics/i40e.rst > @@ -411,3 +411,36 @@ configuration passed on the EAL command line. > > The floating VEB functionality requires a NIC firmware version of 5.0 or > greater. > + > + > +Limitations or Known issues > +--------------------------- > + > +MPLS packet classification on X710/XL710 > +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > + > +Before NIC firmware version of 5.0, MPLS packet cannot be recognized by > NIC. > +The L2 Payload flow type in flow director can be used to classify MPLS > +packet by the command in testpmd like: > + > + testpmd> flow_director_filter 0 mode IP add flow l2_payload ether \ > + 0x8847 flexbytes () fwd pf queue <N> fd_id <M> > + > +In the NIC firmware whose version is 5.0 or greater, very limited MPLS > +support is added: Native MPLS skip is implemented, that is, packet type > +can be recognized like MPLS header is skipped, while no new packet type > +and no more meta data is extracted from MPLS header. With this change, > +L2 Payload flow type in flow director cannot be used to classify MPLS packet > as previous. > +Meanwhile, Ethertype filter can be used to classify MPLS packet by the > +command in testpmd like: > + > + testpmd> ethertype_filter 0 add mac_ignr 00:00:00:00:00:00 ethertype \ > + 0x8847 fwd queue <M> > + > +16 Byte Descriptor cannot be used on DPDK VF > +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > + > +If Linux i40e kerel driver is used as host driver, while DPDK i40e PMD
one typo: kerel -> kernel > +is used as VF driver, DPDK cannot choose 16 byte descriptor receive > +descriptor. That is to say, user should keep > +"CONFIG_RTE_LIBRTE_I40E_16BYTE_RX_DESC=n" in config file. > -- > 2.4.11
