From: Thomas Monjalon <thomas.monjalon@6wind.com>
To: "Wang, Xiao W" <xiao.w.wang@intel.com>
Cc: dev@dpdk.org
Subject: Re: [dpdk-dev] [PATCH v3 1/3] fm10k: enable FTAG based forwarding
Date: Fri, 26 Feb 2016 10:06:18 +0100 [thread overview]
Message-ID: <4126401.C51dJZWCEs@xps13> (raw)
In-Reply-To: <B7F2E978279D1D49A3034B7786DACF403DBAD052@SHSMSX101.ccr.corp.intel.com>
2016-02-26 04:31, Wang, Xiao W:
> From: Richardson, Bruce
> > On Thu, Feb 25, 2016 at 03:45:45PM +0000, Chen, Jing D wrote:
> > > From: Richardson, Bruce
> > > > On Thu, Feb 25, 2016 at 10:04:02AM +0000, Chen, Jing D wrote:
> > > > > This feature is trying to use FTAG (a unique tech in fm10k)
> > > > > instead of mac/vlan to forward packets. App need a way to tell PMD
> > > > > driver that which forwarding style it would like to use.
> > > >
> > > > Why not just specify this in the port configuration at setup time?
> > > >
> > >
> > > Please educate me. I think the port configuration flags are also
> > > common to all PMD Drivers. Is it possible to add a flag like "RTE_USE_FTAG"
> > and pass to PMD driver?
> > >
> > They are.
> > For something PMD specific, like FTAG, it's always a challenge, and I don't
> > know off the top of my head if there is a simple option. However, given the
> > choice between an mbuf flag and a port config flag, I'd always choose the
> > former.
> > Other alternatives would be to have a fm10k specific API in the fm10k driver
> > alone.
> >
> > I'll let Thomas as ethdev maintainer comment if he has other suggestions as to
> > how to handle this case. I suspect this won't be the first device-specific piece of
> > functionality we need to deal with.
> >
> > /Bruce
>
> Whatever method we choose, we have to find a way for the user to express his need
> for FTAG, it maybe a build time config option, or a port config flag (no such flag now),
> or a fast path flag in mbuf (no such flag now) etc. For the customer Topsec's use case,
> they use FTAG for all the TX packets, so all the above methods (per build config, per
> port config, per mbuf config) can meet their need. Since the pmd frame work is for
> common, it's hard to add new fields only for one specific NIC, so I add a build time
> config and make an introduction in the doc.
>
> Thanks for the discussion, Thomas, do you have any suggestions?
I don't understand why you say this feature is specific to fm10k. Can we
imagine another NIC having this capability?
I think it must be an port configuration, as Bruce suggested.
What about a field in struct rte_eth_conf?
next prev parent reply other threads:[~2016-02-26 9:07 UTC|newest]
Thread overview: 52+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-01-25 8:07 [dpdk-dev] [PATCH 0/3] " Wang Xiao W
2016-01-25 8:07 ` [dpdk-dev] [PATCH 1/3] " Wang Xiao W
2016-02-02 3:07 ` Qiu, Michael
2016-02-02 10:03 ` Wang, Xiao W
2016-02-02 10:50 ` [dpdk-dev] [PATCH v2 0/3] " Wang Xiao W
2016-02-02 10:50 ` [dpdk-dev] [PATCH v2 1/3] " Wang Xiao W
2016-02-03 6:52 ` Chen, Jing D
2016-02-04 2:39 ` Wang, Xiao W
2016-02-04 3:38 ` [dpdk-dev] [PATCH v3 0/3] " Wang Xiao W
2016-02-04 3:38 ` [dpdk-dev] [PATCH v3 1/3] " Wang Xiao W
2016-02-24 15:42 ` Bruce Richardson
2016-02-24 16:37 ` Thomas Monjalon
2016-02-24 17:05 ` Bruce Richardson
2016-02-25 10:04 ` Chen, Jing D
2016-02-25 13:35 ` Bruce Richardson
2016-02-25 15:45 ` Chen, Jing D
2016-02-25 16:14 ` Bruce Richardson
2016-02-26 4:31 ` Wang, Xiao W
2016-02-26 9:06 ` Thomas Monjalon [this message]
2016-02-26 9:24 ` Wang, Xiao W
2016-02-26 14:48 ` Bruce Richardson
2016-02-26 15:00 ` David Marchand
2016-02-26 16:33 ` Bruce Richardson
2016-02-29 1:47 ` Wang, Xiao W
2016-02-26 20:48 ` Thomas Monjalon
2016-03-01 5:36 ` [dpdk-dev] [PATCH v4 0/3] " Wang Xiao W
2016-03-01 5:36 ` [dpdk-dev] [PATCH v4 1/3] " Wang Xiao W
2016-03-01 7:35 ` Thomas Monjalon
2016-03-01 11:06 ` Wang, Xiao W
2016-03-01 22:37 ` Stephen Hemminger
2016-03-02 6:05 ` Wang, Xiao W
2016-03-02 13:47 ` Thomas Monjalon
2016-03-02 11:19 ` [dpdk-dev] [PATCH v5 0/2] " Wang Xiao W
2016-03-02 11:19 ` [dpdk-dev] [PATCH v5 1/2] " Wang Xiao W
2016-03-10 16:32 ` Bruce Richardson
2016-03-02 11:19 ` [dpdk-dev] [PATCH v5 2/2] doc: add introduction for fm10k " Wang Xiao W
2016-03-08 7:57 ` [dpdk-dev] [PATCH v5 0/2] fm10k: enable " Liu, Yong
2016-03-10 3:34 ` Wang, Xiao W
2016-03-10 16:40 ` Bruce Richardson
2016-03-01 5:36 ` [dpdk-dev] [PATCH v4 2/3] doc: add introduction for fm10k " Wang Xiao W
2016-03-01 5:36 ` [dpdk-dev] [PATCH v4 3/3] doc: update release note for fm10k FTAG support Wang Xiao W
2016-02-04 3:38 ` [dpdk-dev] [PATCH v3 2/3] doc: add introduction for fm10k FTAG based forwarding Wang Xiao W
2016-02-22 14:06 ` Mcnamara, John
2016-02-04 3:38 ` [dpdk-dev] [PATCH v3 3/3] doc: update release note for fm10k FTAG support Wang Xiao W
2016-02-22 13:51 ` Mcnamara, John
2016-02-04 9:47 ` [dpdk-dev] [PATCH v3 0/3] fm10k: enable FTAG based forwarding Chen, Jing D
2016-02-02 10:50 ` [dpdk-dev] [PATCH v2 2/3] doc: add introduction for fm10k " Wang Xiao W
2016-02-02 10:50 ` [dpdk-dev] [PATCH v2 3/3] doc: update release note for fm10k FTAG support Wang Xiao W
2016-01-25 8:07 ` [dpdk-dev] [PATCH 2/3] doc: add introduction for fm10k FTAG based forwarding Wang Xiao W
2016-01-25 8:07 ` [dpdk-dev] [PATCH 3/3] doc: update release note for fm10k FTAG support Wang Xiao W
2016-02-01 16:20 ` Mcnamara, John
2016-01-26 6:01 ` [dpdk-dev] [PATCH 0/3] fm10k: enable FTAG based forwarding Liu, Yong
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=4126401.C51dJZWCEs@xps13 \
--to=thomas.monjalon@6wind.com \
--cc=dev@dpdk.org \
--cc=xiao.w.wang@intel.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).