Hi, Jerin Jacob > -----Original Message----- > From: Jerin Jacob [mailto:[email protected]] > Sent: Thursday, November 1, 2018 6:34 PM > To: Zhao1, Wei <[email protected]> > Cc: Yigit, Ferruh <[email protected]>; [email protected]; > [email protected]; [email protected]; > [email protected]; Zhang, Qi Z <[email protected]>; Xing, Beilei > <[email protected]>; Lu, Wenzhuo <[email protected]>; Ananyev, > Konstantin <[email protected]> > Subject: Re: [dpdk-dev] DEV_RX_OFFLOAD_VLAN_EXTEND offload > > -----Original Message----- > > Date: Thu, 1 Nov 2018 09:50:12 +0000 > > From: "Zhao1, Wei" <[email protected]> > > To: Jerin Jacob <[email protected]>, "Yigit, Ferruh" > > <[email protected]> > > CC: "[email protected]" <[email protected]>, "[email protected]" > > <[email protected]>, "[email protected]" > > <[email protected]>, "[email protected]" > > <[email protected]>, "Zhang, Qi Z" <[email protected]>, > > "Xing, Beilei" <[email protected]>, "Lu, Wenzhuo" > > <[email protected]>, "Ananyev, Konstantin" > > <[email protected]> > > Subject: RE: [dpdk-dev] DEV_RX_OFFLOAD_VLAN_EXTEND offload > > > > > > > -----Original Message----- > > > From: dev [mailto:[email protected]] On Behalf Of Jerin Jacob > > > Sent: Friday, October 26, 2018 10:35 PM > > > To: Yigit, Ferruh <[email protected]> > > > Cc: [email protected]; [email protected]; [email protected]; > > > [email protected]; Zhang, Qi Z <[email protected]>; Xing, > > > Beilei <[email protected]>; Lu, Wenzhuo <[email protected]>; > > > Ananyev, Konstantin <[email protected]> > > > Subject: Re: [dpdk-dev] DEV_RX_OFFLOAD_VLAN_EXTEND offload > > > > > > -----Original Message----- > > > > Date: Fri, 26 Oct 2018 14:40:42 +0100 > > > > From: Ferruh Yigit <[email protected]> > > > > To: Jerin Jacob <[email protected]>, "[email protected]" > > > > <[email protected]> > > > > CC: "[email protected]" <[email protected]>, > > > > "[email protected]" <[email protected]>, > > > > "[email protected]" <[email protected]>, > > > "[email protected]" > > > > <[email protected]>, "[email protected]" > > > > <[email protected]>, Wenzhuo Lu <[email protected]>, > > > > Konstantin Ananyev <[email protected]> > > > > Subject: Re: [dpdk-dev] DEV_RX_OFFLOAD_VLAN_EXTEND offload > > > > User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:52.0) > > > > Gecko/20100101 > > > > Thunderbird/52.9.1 > > > > > > > > > > > > On 10/26/2018 11:56 AM, Jerin Jacob wrote: > > > > > > > > > > Does anyone know the expectation of > > > DEV_RX_OFFLOAD_VLAN_EXTEND > > > > > offload? Does not look like it is documented. > > > > > > > > > > Looks like it is very specific to Intel controllers, Based on > > > > > 82599 HRM, it is following, not sure what is the real > > > > > expectation from NIC in normative terms. > > > > > > > > > > Extended VLAN. > > > > > ------------- > > > > > When set, all incoming Rx packets are expected to have at least > > > > > one VLAN with the Ether type as defined in EXVET register. The > > > > > packets can have an inner-VLAN that should be used for all > > > > > filtering purposes. All Tx packets are expected to have at least > > > > > one VLAN added to them by the host. In the case of an additional > > > > > VLAN request (VLE), the inner-VLAN is added by the hardware > > > > > after the outer-VLAN is > > > added by the host. > > > > > This bit should only be reset by a PCIe reset and should only be > > > > > changed while Tx and Rx processes are stopped. > > > > > The exception to this rule are MAC control packets such as flow > > > > > control, 802.1x, LACP, etc. that never carry a VLAN tag of any > > > > > type > > > > > > > > > > > > > This looks similar to QinQ but it seems not, in ixgbe datasheet it has: > > > > > > Yes. QinQ there is an already an offload called > > > DEV_RX_OFFLOAD_QINQ_STRIP > > > > Excuse me, I have some thought, is that right? > > maybe DEV_RX_OFFLOAD_QINQ_STRIP and > DEV_RX_OFFLOAD_VLAN_EXTEND is just two thing that play a different role > each. > > DEV_RX_OFFLOAD_VLAN_EXTEND tell NIC to recognize QinQ PACKETS, it is > a filter for NIC. > > DEV_RX_OFFLOAD_QINQ_STRIP tell nic to strip 2 inner and outer vlan head > when moving packets from nic to host memory. > > I40e NIC is the normative terms when handling qinq packets. > > Yes, it makes sense if the meaning of DEV_RX_OFFLOAD_VLAN_EXTEND is > QINQ filter. But it looks like not, as .vlan_filter_set ethdev callback > accepts > only single vlan id as "uint16_t vlan_id". > If it needs to be treated as QinQ filter then QinQ vlan_ids needs to be send > to driver through some means. >
Yes, DEV_RX_OFFLOAD_VLAN_EXTEND can enable the qinq filter, but I do not find the way to config QinQ vlan_ids, May be we need some means to send inner and outer vlan id to PMD, may be it is already exist but we do not find it. I will check that and report in this mail if I get the result. > > Probably we may need to deprecate these vlan API in long-term and > enable it through rte_flow. Good idea! > > > > > > > > > > > > > > > > > " > > > > Double VLAN and Single VLAN Support > > > > ----------------------------------- > > > > <....> > > > > This mode is used for systems where the near end switch adds the > > > > outer VLAN header containing switching information. > > > > <...> > > > > " > > > > > > > > And it in this mode hw doesn't insert or strip the outer VLAN, it > > > > expect SW does it. The ethernet type is not 0x88A8 but can be anything > > > > set on EXVET.VET_EXT. So looks like it is to let switch to add custom > VLAN > > > tags and NIC to ignore them.
