netdev - Re: [patch net-next v3 04/17] net: introduce generic switch devices support

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Date:	Tue, 25 Nov 2014 18:18:17 -1000
From:	Scott Feldman <sfeldma@...il.com>
To:	Jamal Hadi Salim <jhs@...atatu.com>
Cc:	Thomas Graf <tgraf@...g.ch>, Jiri Pirko <jiri@...nulli.us>,
	Netdev <netdev@...r.kernel.org>,
	"David S. Miller" <davem@...emloft.net>,
	"nhorman@...driver.com" <nhorman@...driver.com>,
	Andy Gospodarek <andy@...yhouse.net>,
	"dborkman@...hat.com" <dborkman@...hat.com>,
	"ogerlitz@...lanox.com" <ogerlitz@...lanox.com>,
	"jesse@...ira.com" <jesse@...ira.com>,
	"pshelar@...ira.com" <pshelar@...ira.com>,
	"azhou@...ira.com" <azhou@...ira.com>,
	"ben@...adent.org.uk" <ben@...adent.org.uk>,
	"stephen@...workplumber.org" <stephen@...workplumber.org>,
	"Kirsher, Jeffrey T" <jeffrey.t.kirsher@...el.com>,
	"vyasevic@...hat.com" <vyasevic@...hat.com>,
	Cong Wang <xiyou.wangcong@...il.com>,
	"Fastabend, John R" <john.r.fastabend@...el.com>,
	Eric Dumazet <edumazet@...gle.com>,
	Florian Fainelli <f.fainelli@...il.com>,
	Roopa Prabhu <roopa@...ulusnetworks.com>,
	John Linville <linville@...driver.com>,
	"jasowang@...hat.com" <jasowang@...hat.com>,
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	Nicolas Dichtel <nicolas.dichtel@...nd.com>,
	"ryazanov.s.a@...il.com" <ryazanov.s.a@...il.com>,
	"buytenh@...tstofly.org" <buytenh@...tstofly.org>,
	Aviad Raveh <aviadr@...lanox.com>,
	"nbd@...nwrt.org" <nbd@...nwrt.org>,
	Alexei Starovoitov <alexei.starovoitov@...il.com>,
	Neil Jerram <Neil.Jerram@...aswitch.com>,
	"ronye@...lanox.com" <ronye@...lanox.com>,
	"simon.horman@...ronome.com" <simon.horman@...ronome.com>,
	"alexander.h.duyck@...hat.com" <alexander.h.duyck@...hat.com>,
	"Ronciak, John" <john.ronciak@...el.com>,
	"mleitner@...hat.com" <mleitner@...hat.com>,
	Shrijeet Mukherjee <shrijeet@...il.com>,
	Andy Gospodarek <gospo@...ulusnetworks.com>,
	Benjamin LaHaise <bcrl@...ck.org>
Subject: Re: [patch net-next v3 04/17] net: introduce generic switch devices support

On Tue, Nov 25, 2014 at 5:33 PM, Jamal Hadi Salim <jhs@...atatu.com> wrote:
> On 11/25/14 16:54, Thomas Graf wrote:
>>
>> On 11/25/14 at 12:08pm, Jamal Hadi Salim wrote:
>
>
>> It would definitely help if you could expose some more details on the
>> "some network processor" you have. We're all very eager ;-)
>>
>
> Well, this thing doesnt run ovs ;-> (/me runs). If you come
> to netdev i may let you play with it ;-> Its a humongous device
> (think multi 100G ports).
>
> On a serious note: Even if you took what Simon/Netronome has
> (yes, I know they use ovs;->) - there is really no need for a switch
> abstraction *at all* if all you want to is hang a packet
> processing graph that ingresses at a port and egress at another port.
> As you know, Linux supports it just fine with tc.

You have a pointer to the kernel driver for that HW?  Can you show how
you're using Linux tc netlink msg in kernel to program HW?  I'd like
to see the in-kernel API.
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