Date: Fri, 09 Nov 2007 14:07:40 +0300 From: Roman Kurakin <rik@inse.ru> To: Alexander Sabourenkov <screwdriver@lxnt.info> 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. Message-ID: <47343F7C.4050709@inse.ru> In-Reply-To: <472CEFDD.2020103@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>
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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. > > >
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