linux-kernel - Re: Sata_via problems in a Vintage2-AE1

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Date:	Mon, 12 Feb 2007 10:11:49 +0100
From:	Jean Delvare <jdelvare@...e.de>
To:	Tejun Heo <htejun@...il.com>
Cc:	Leopold Palomo Avellaneda <lepalom@....es>,
	linux-ide@...r.kernel.org, linux-kernel@...r.kernel.org,
	Alan Cox <alan@...rguk.ukuu.org.uk>,
	Jeff Garzik <jgarzik@...ox.com>
Subject: Re: Sata_via problems in a Vintage2-AE1

Le Samedi 10 Février 2007 15:45, Tejun Heo a écrit :
> [cc'ing Alan and Jean, Hi!]
>
> Leopold Palomo Avellaneda wrote:
> > A Divendres 09 Febrer 2007 18:13, Leopold Palomo Avellaneda va escriure:
> >> A Divendres 09 Febrer 2007 10:46, Tejun Heo va escriure:
> >>> Leopold Palomo Avellaneda wrote:
> >>>> Dear people,
> >>>>
> >>>> I have a barebone Asus Vintage2-AE1 [1]. This box has a mobo Asus
> >>>> A8V-MQ. The board has:
> >>>> - the Socket 939 for AMD Athlon 64FX/Athlon 64.
> >>>> - North Bridge: VIA K8M800
> >>>> - South Bridge: VIA VT8251
> >>>> - VIA Graphics Integrated
> >>>> - IDE 2 x UltraDMA 133
> >>>> - 4 x Serial ATA
> >>>> ...
> >>>>
> >>>> I'm using the bios version 0206. The 0210 doesn't show me the vga
> >>>> card, so I don't have graphics mode. I think that is a buggy bios.

Did you report the problem to Asus? They should fix it. Maybe this new BIOS 
actually fixes some other problems you have.

> >>>> The bios is configured with vt8251 in AHCI mode and bios boot up
> >>>> activated, so the hd is recognized in the beginning. I don't have any
> >>>> raid, only one hd. The hd is a Maxtor 6V250F0.
> >>>>
> >>>> I'm using a debian etch but the i386 version. The only way that I can
> >>>> use the hd is using a 2.6.16 standard kernel with the modifications
> >>>> explained in this page [2]. Basically you have to use their ahci.c and
> >>>> sata_via.c. The modifications are small from the original code from Mr
> >>>> Jeff Garzik.
> >>>>
> >>>> I have tried to use the 2.6.18 and 2.6.20rc6 and the result is the
> >>>> same. The kernel boots, but when arrives at the ata3,
> >>>>
> >>>> scsi2 : ahci
> >>>> ata3: SATA link up 1.5 Gbps (SStatus 113 SControl 300)
> >>>> ata3.00: qc timeout (cmd 0xec)
> >>>> ata3.00: failed to IDENTIFY (I/O error, err_mask=0x104)
> >>>> .... repeated some times ...
> >>>> scsi3 : ahci
> >>>> ata4: SATA link up 1.5 Gbps (SStatus 113 SControl 300)
> >>>> scsi4 : ahci
> >>>> ata4: SATA link up 1.5 Gbps (SStatus 113 SControl 300)
> >>>> scsi5 : ahci
> >>>> ata6: SATA link up 1.5 Gbps (SStatus 113 SControl 300)
> >>>> Done.
> >>>> Begin: Mounting root file system... ...
> >>>> Begin: Running /scripts/local-top
> >>>> ide0: I/O resource 0x3F6-0x3F6 not free.
> >>>> ide0: ports already in use, skipping probe.
> >>>> ide1: I/O resource 0x376-0x376 not free.
> >>>> ide1: ports already in use, skipping probe.
> >>>> Done.
> >>>> Begin: Waiting for root file system ...
> >>>
> >>> It might be VIA IRQ quirk problem.
> >>>
> >>> 1. Does giving 'irqpoll' parameter to kernel make any difference?
> >>
> >> yes. Now it boots. However I'm having a lot of messages:
> >> APIC error on CPU0
> >> and I begin to have problems with the network card.
> >>
> >>> 2. Can you give a shot at 2.6.20?
> >>
> >> yes, I'm doing it now.
> >>
> >> Thank's a lot. But, why with irqpoll works and without no?
> >
> > well, I summarize.
> >
> > With the default options of the kernel I cannot boot in this device with
> > any kernel. Only with 2.6.20 and the irqpoll or the 2.6.16 modified files
> > I can boot.
> >
> > I have a lot of APIC error on CPU0.

Maybe try booting with noapic and/or nolapic and see if it helps. That's 
probably just a workaround and not the right solution though.

> It seems one of via pci routing quirk problem.  Can you give a shot at
> 'acpi=off' or 'acpi=noirq' without 'irqpoll'?
>
> I dunno much about what's going on there.  Alan, Jean, any ideas?

I've read the whole thread, the source code (quickly) and the patches to 
ahci.c and sata_via.c, and here are some comments:

It looks like support for the VT8251 was added to the ahci driver in kernel 
2.6.18, and was then updated in 2.6.20. The code is different from the 
patch Leopold is using with 2.6.16. As I am not an expert in this area, I 
can't tell whether both versions are equivalent or not, but I'd guess so.

On the other hand, I do not see VT8251 support in the sata_via driver in the 
kernel, so I'm not surprised that it doesn't work properly for Leopold. But 
again I am no expert in the area, so maybe the sata_via driver in the kernel 
is supposed to work for VT8251-based systems. Jeff (cc'd) should know better.

I also see that there were many changes to these drivers post-2.6.20, so maybe 
Leopold could give a try to Linus' latest kernel (2.6.20-git6 as I speak) and 
see if there are any improvements.

As for the VIA IRQ quirks, the version we have in 2.6.20 does not handle the 
VIA chips more recent than the VT8237A. If the VT8251 needs it, then we have 
to add it. Alan?

*If* the VT8251 needs the VIA IRQ quirk, then the attached patch may help. 
Leopold, can you give it a try?

-- 
Jean Delvare
Suse L3

View attachment "pci-via-irq-quirk-for-VT8251.patch" of type "text/x-diff" (1659 bytes)