From: Tejun Heo <tj@kernel.org>
To: Tom van Klinken / ISP Services BV <tom@isp-services.nl>
Cc: linux-ide@vger.kernel.org
Subject: Re: Problem with ICH10R and Port Multipliers
Date: Tue, 20 Oct 2009 10:49:59 +0900 [thread overview]
Message-ID: <4ADD1747.5070000@kernel.org> (raw)
In-Reply-To: <4ADC9058.4090701@isp-services.nl>
Tom van Klinken / ISP Services BV wrote:
> Hi,
>
> I've got a Intel DG45FC motherboard that I would like to integrate into
> a NAS system.
>
> This board has the ICH10R chipset and from what I have understood this
> chipset should support port multipliers.
> (http://www.intel.com/design/chipsets/matrixstorage_sb.htm)
>
> However it does not, it also does not show 'pmp' support in the AHCI flags.
>
> After contacting Intel they told me that Port Multipliers are not
> supported on their boards.
>
> Did they deliberately turn PMP support off?
IIRC, since ICH8 or 9, intel ahcis do support PMP. The flag can be
controlled by the BIOS. Hmmm.... maybe you can just comment out the
code and force ahci to enable PMP. My gut feeling is that it'll
probably work. Maybe we need to add quirks or a parameter to force
it. Can you please verify it works?
Thanks.
--
tejun
next prev parent reply other threads:[~2009-10-20 1:48 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-10-19 16:14 Problem with ICH10R and Port Multipliers Tom van Klinken / ISP Services BV
2009-10-20 0:46 ` Robert Hancock
2009-10-20 1:49 ` Tejun Heo [this message]
2009-10-20 7:02 ` Tom van Klinken / ISP Services BV
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