From: Micha Nelissen <micha@neli.hopto.org>
To: "Bounine, Alexandre" <Alexandre.Bounine@idt.com>
Cc: akpm@linux-foundation.org, linux-kernel@vger.kernel.org,
linuxppc-dev@lists.ozlabs.org,
Matt Porter <mporter@kernel.crashing.org>,
Li Yang <leoli@freescale.com>,
Kumar Gala <galak@kernel.crashing.org>,
Thomas Moll <thomas.moll@sysgo.com>
Subject: Re: [PATCH -mm 0/2] RapidIO: Changes to handling of RIO switches
Date: Mon, 25 Oct 2010 18:13:31 +0200 [thread overview]
Message-ID: <4CC5ACAB.7070309@neli.hopto.org> (raw)
In-Reply-To: <0CE8B6BE3C4AD74AB97D9D29BD24E55201445BA4@CORPEXCH1.na.ads.idt.com>
Bounine, Alexandre wrote:
> Micha Nelissen <micha@neli.hopto.org> wrote:
>>> rid of rswitch->switchid and use component_tag directly for
> switches).
>> I still prefer the destid as the single identification id.
>
> In your patch you allocate individual destid for switches. This method
> has two problems:
> 1. The destid for the switch needs an additional mechanism to share it
> among processors in the RIO network,
? See comment for 2)
> 2. It takes ID value away from the pool of available IDs, what will
It does not take an ID away, it shares it with a connected endpoint to
that switch. The tag uses one extra bit to identify the device as a
switch instead of an endpoint. This provides the information to
unambiguously identify a switch from an endpoint.
Micha
next prev parent reply other threads:[~2010-10-25 16:13 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-10-21 19:10 [PATCH -mm 0/2] RapidIO: Changes to handling of RIO switches Alexandre Bounine
2010-10-21 19:10 ` [PATCH -mm 1/2] RapidIO: Use common destid storage for endpoints and switches Alexandre Bounine
2010-10-21 19:10 ` [PATCH -mm 2/2] RapidIO: Integrate rio_switch into rio_dev Alexandre Bounine
2010-10-21 21:15 ` [PATCH -mm 0/2] RapidIO: Changes to handling of RIO switches Micha Nelissen
2010-10-22 16:47 ` Bounine, Alexandre
2010-10-22 18:28 ` Micha Nelissen
2010-10-22 21:04 ` Bounine, Alexandre
2010-10-22 21:58 ` Micha Nelissen
2010-10-25 13:22 ` Bounine, Alexandre
2010-10-25 16:13 ` Micha Nelissen [this message]
2010-10-25 17:13 ` Bounine, Alexandre
2010-10-25 20:06 ` Micha Nelissen
2010-10-26 13:39 ` Bounine, Alexandre
2010-10-26 14:22 ` Micha Nelissen
2010-10-26 17:17 ` Bounine, Alexandre
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