netdev - Re: NAPI of many interfaces with just an interruption source

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Message-ID: <20090221131251.GA28821@gondor.apana.org.au>
Date:	Sat, 21 Feb 2009 21:12:51 +0800
From:	Herbert Xu <herbert@...dor.apana.org.au>
To:	Stephen Hemminger <shemminger@...tta.com>
Cc:	gotzoncabanes@...il.com, netdev@...r.kernel.org,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>
Subject: Re: NAPI of many interfaces with just an interruption source

Stephen Hemminger <shemminger@...tta.com> wrote:
> On Fri, 20 Feb 2009 19:33:23 +0100
> Miguel Ángel Álvarez <gotzoncabanes@...il.com> wrote:
>> 
>> I have four interfaces that share the same interruption source (four
>> hdlc channels in ixp4xx that share the same rx queue... but I am
>> trying to do the question generic).
>
> Several other devices have this (like sky2).  Since NAPI needs
> to control irq, you need to have 1 NAPI instance per IRQ, so for
> these type of drivers there is 1 NAPI in hardware structure
> and multiple network devices.

Ben has just done exactly the same thing for his driver so he
can tell you all about it and how to use his generic function :)

Thanks,
-- 
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Email: Herbert Xu ~{PmV>HI~} <herbert@...dor.apana.org.au>
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