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Date:	Tue, 11 Nov 2014 16:19:28 +0100
From:	Jiri Pirko <jiri@...nulli.us>
To:	Thomas Graf <tgraf@...g.ch>
Cc:	John Fastabend <john.fastabend@...il.com>, netdev@...r.kernel.org,
	davem@...emloft.net, nhorman@...driver.com, andy@...yhouse.net,
	dborkman@...hat.com, ogerlitz@...lanox.com, jesse@...ira.com,
	pshelar@...ira.com, azhou@...ira.com, ben@...adent.org.uk,
	stephen@...workplumber.org, jeffrey.t.kirsher@...el.com,
	vyasevic@...hat.com, xiyou.wangcong@...il.com,
	john.r.fastabend@...el.com, edumazet@...gle.com, jhs@...atatu.com,
	sfeldma@...il.com, f.fainelli@...il.com, roopa@...ulusnetworks.com,
	linville@...driver.com, jasowang@...hat.com, ebiederm@...ssion.com,
	nicolas.dichtel@...nd.com, ryazanov.s.a@...il.com,
	buytenh@...tstofly.org, aviadr@...lanox.com, nbd@...nwrt.org,
	alexei.starovoitov@...il.com, Neil.Jerram@...aswitch.com,
	ronye@...lanox.com, simon.horman@...ronome.com,
	alexander.h.duyck@...hat.com, john.ronciak@...el.com,
	mleitner@...hat.com, shrijeet@...il.com, gospo@...ulusnetworks.com,
	bcrl@...ck.org
Subject: Re: [patch net-next v2 05/10] rocker: introduce rocker switch driver

Tue, Nov 11, 2014 at 03:29:46PM CET, tgraf@...g.ch wrote:
>On 11/10/14 at 02:04pm, John Fastabend wrote:
>> On 11/09/2014 02:51 AM, Jiri Pirko wrote:
>> >+static int rocker_port_sw_parent_id_get(struct net_device *dev,
>> >+					struct netdev_phys_item_id *psid)
>> >+{
>> >+	struct rocker_port *rocker_port = netdev_priv(dev);
>> >+	struct rocker *rocker = rocker_port->rocker;
>> >+
>> 
>> hmm looks like you read this out of a magic switch register :) but
>> my switch doesn't have this magic reg. I suposse the switch MAC address
>> should work.
>
>This needs more work afterwards. Either we define that the switch ID
>is only unique in combination with the parent ifindex or we need to
>introduce a notation of uniquness into the switch ID itself.

This is something similar to physical port id. Each driver should take
care of generating that id.

>
>Is the goal to expose a hardware ID here to allow identification of
>the hardware chip?
>
>MAC is tempting but I'm pretty sure that we'll have pure L3 devices
>being handled by this API at some point.
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