From: Mark Lord <liml@rtr.ca>
To: Bernie Innocenti <bernie@codewiz.org>
Cc: Harri Olin <harri.olin@gmail.com>,
linux-ide@vger.kernel.org, lkml <linux-kernel@vger.kernel.org>,
sysadmin <sysadmin@gnu.org>
Subject: Re: sata_mv 0000:03:06.0: PCI ERROR; PCI IRQ cause=0x30000040
Date: Thu, 08 Oct 2009 23:16:05 -0400 [thread overview]
Message-ID: <4ACEAAF5.90304@rtr.ca> (raw)
In-Reply-To: <4ACEA8FB.4060901@rtr.ca>
Mark Lord wrote:
> Bernie Innocenti wrote:
>>
>> I want to try reducing the frequency of the PCI-X bus, but the BIOS does
>> not seem to provide a setting for it. Is there another way?
> ..
>
> Nothing that's easy.
..
Adding to that: there is a register on the chip,
which software could use to override the normal auto-detected
PCI mode (bus speed) for the chip. This could be used to,
say, select 100Mhz or 66Mhz, or even 33Mhz operation.
BUT.. the register is autodetected from the bus at power-on,
and so if software wants to override that (by rewriting the reg),
it will also need to reset the PCI bus afterward.
Which requires knowing how to reset a PCI bridge,
something I don't know about.
Cheers
next prev parent reply other threads:[~2009-10-09 3:16 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-10-03 5:10 sata_mv 0000:03:06.0: PCI ERROR; PCI IRQ cause=0x30000040 Bernie Innocenti
2009-10-05 21:45 ` Mark Lord
2009-10-06 4:16 ` Bernie Innocenti
2009-10-06 12:25 ` Harri Olin
2009-10-06 18:04 ` Bernie Innocenti
2009-10-06 20:06 ` Mark Lord
2009-10-07 0:06 ` Bernie Innocenti
2009-10-07 1:40 ` Bernie Innocenti
2009-10-07 3:13 ` Mark Lord
2009-10-08 16:42 ` Bernie Innocenti
2009-10-08 17:09 ` Tony Vroon
2009-10-14 15:24 ` [SOLVED] " Bernie Innocenti
2009-10-09 3:07 ` Mark Lord
2009-10-09 3:16 ` Mark Lord [this message]
2009-10-08 16:26 ` Bernie Innocenti
2009-10-08 21:51 ` Harri Olin
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=4ACEAAF5.90304@rtr.ca \
--to=liml@rtr.ca \
--cc=bernie@codewiz.org \
--cc=harri.olin@gmail.com \
--cc=linux-ide@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=sysadmin@gnu.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).