netdev - Re: [patch net-next 3/4] mlxsw: Add interface to access registers and process events

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Message-ID: <6CDA9E80-6111-4BEF-9DB0-1CD08AA8BC2A@mellanox.com>
Date:	Fri, 24 Jul 2015 06:48:59 +0000
From:	Elad Raz <eladr@...lanox.com>
To:	Scott Feldman <sfeldma@...il.com>
CC:	Jiri Pirko <jiri@...nulli.us>, Netdev <netdev@...r.kernel.org>,
	"David S. Miller" <davem@...emloft.net>,
	Ido Schimmel <idosch@...lanox.com>,
	Or Gerlitz <ogerlitz@...lanox.com>,
	Roopa Prabhu <roopa@...ulusnetworks.com>,
	"Florian Fainelli" <f.fainelli@...il.com>,
	Thomas Graf <tgraf@...g.ch>,
	"Alexei Starovoitov" <ast@...mgrid.com>,
	Jamal Hadi Salim <jhs@...atatu.com>,
	"Daniel Borkmann" <daniel@...earbox.net>,
	john fastabend <john.fastabend@...il.com>,
	"simon.horman@...ronome.com" <simon.horman@...ronome.com>,
	John Linville <linville@...driver.com>,
	Andy Gospodarek <andy@...yhouse.net>,
	"Shrijeet Mukherjee" <shm@...ulusnetworks.com>,
	"nhorman@...driver.com" <nhorman@...driver.com>,
	Jiri Pirko <jiri@...lanox.com>,
	Matty Kadosh <mattyk@...lanox.com>
Subject: Re: [patch net-next 3/4] mlxsw: Add interface to access registers and
 process events



Sent from my iPhone

> On Jul 24, 2015, at 08:14, Scott Feldman <sfeldma@...il.com> wrote:
> 
>> On Thu, Jul 23, 2015 at 8:43 AM, Jiri Pirko <jiri@...nulli.us> wrote:
>> From: Ido Schimmel <idosch@...lanox.com>
>> 
>> Add the ability to construct mailbox-style register access messages
>> called EMADs with provisions to construct and parse the registers payload.
>> Implement EMAD transaction layer which is responsible for the reliable
>> transmission of EMADs.
>> Also, add an infrastructure used by the switch driver to register for
>> particular events generated by the device.
> 
> What is this EMADs used for?  Is this for intra-switch or inter-switch
> communications?

Ethernet management datagram.
It's command encoding wrap as a packet. It used for host interface communication as well as multi-silicon support.--
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