From owner-freebsd-hackers@FreeBSD.ORG  Fri Nov  9 11:09:54 2007
Return-Path: <owner-freebsd-hackers@FreeBSD.ORG>
Delivered-To: freebsd-hackers@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 03C8A16A46B;
	Fri,  9 Nov 2007 11:09:54 +0000 (UTC) (envelope-from rik@inse.ru)
Received: from mail.inse.ru (mail.inse.ru [144.206.128.1])
	by mx1.freebsd.org (Postfix) with ESMTP id 9B01413C4B0;
	Fri,  9 Nov 2007 11:09:53 +0000 (UTC) (envelope-from rik@inse.ru)
Received: from [127.0.0.1] (www.inse.ru [144.206.128.1])
	by mail.inse.ru (Postfix) with ESMTP id 2E83033C0A;
	Fri,  9 Nov 2007 13:52:59 +0300 (MSK)
Message-ID: <47343F7C.4050709@inse.ru>
Date: Fri, 09 Nov 2007 14:07:40 +0300
From: Roman Kurakin <rik@inse.ru>
User-Agent: Thunderbird 1.5.0.12 (X11/20070719)
MIME-Version: 1.0
To: Alexander Sabourenkov <screwdriver@lxnt.info>
References: <472A548B.50406@lxnt.info>	<wpsl3oe7h9.fsf@heho.snv.jussieu.fr>	<472B9EA1.6060205@deepcore.dk>	<wptzo4yqj7.fsf@heho.snv.jussieu.fr>
	<472CEFDD.2020103@lxnt.info>
In-Reply-To: <472CEFDD.2020103@lxnt.info>
Content-Type: text/plain; charset=UTF-8; format=flowed
Content-Transfer-Encoding: 7bit
Cc: freebsd-hackers@freebsd.org, "Matthew D. Fuller" <fullermd@over-yonder.net>,
	Thierry Herbelot <thierry@herbelot.com>,
	=?UTF-8?B?U8O4cmVuIFNjaG1pZHQ=?= <sos@deepcore.dk>, sos@freebsd.org
Subject: Re: Patch RFC:  Promise SATA300 TX4 hardware bug workaround.
X-BeenThere: freebsd-hackers@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Technical Discussions relating to FreeBSD
	<freebsd-hackers.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-hackers>, 
	<mailto:freebsd-hackers-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-hackers>
List-Post: <mailto:freebsd-hackers@freebsd.org>
List-Help: <mailto:freebsd-hackers-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-hackers>,
	<mailto:freebsd-hackers-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Fri, 09 Nov 2007 11:09:54 -0000

By the way, is there any chance to get RAID5 working with this controller?

rik

Alexander Sabourenkov wrote:
> Arno J. Klaassen wrote:
>   
>> Rather than the marginal HW part, it seems, for me, closely related to
>> MB/BIOS (as well (Alexander apperently has about the same setup as I
>> have for this test)):
>>
>>     
>
> [...]
>
>   
>> I vaguely remember from another PR that the Promise card does
>> something with PCI-bursting which fbsd does not detect and/or
>> handle correctly (and beyond my simple skills as dumb tester, but
>> maybe the linux-sources contain a clue about that as well).
>>
>>     
>
> Analysis of chip initialization in vendor-supplied, Linux and FreeBSD
> drivers shows that FreeBSD's one:
> - does not enable something called 'BMR_BURST',
> - performs hotplug init in one write (instead of two read-modify-writes ),
> - does an extra write (offset 0x54) which is not done in other drivers.
>
> Analysis text: http://lxnt.info/tx4/chipinit.text
>
> Patch with ported chipinit (dangerous to use with anything from Promise
> other than sata300 tx4 !!):
> http://lxnt.info/tx4/freebsd/chipinit.patch (cumulative)
> http://lxnt.info/tx4/freebsd/ata-chipset.c+chipinit (patched source)
>
> Note two things:
> 1. I have not compiled or tested this patch. Please do.
> 2. I may have missed this bug because I'm frequently rebooting between
> Linux and FreeBSD, and what Linux driver initialized may have lasted the
> reboots.
>
>
>