linux-kernel - Re: Supermicro X9SRL-F - channel enumeration error & ACPI/firmware bug question

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Date:	Wed, 28 Nov 2012 17:08:38 -0700
From:	Bjorn Helgaas <bhelgaas@...gle.com>
To:	Justin Piszcz <jpiszcz@...idpixels.com>
Cc:	Bruno Prémont <bonbons@...ux-vserver.org>,
	support@...ermicro.com, linux-kernel@...r.kernel.org,
	Dan Williams <djbw@...com>
Subject: Re: Supermicro X9SRL-F - channel enumeration error & ACPI/firmware
 bug question

On Tue, Nov 27, 2012 at 7:35 AM, Justin Piszcz <jpiszcz@...idpixels.com> wrote:
>
>
> -----Original Message-----
> From: Justin Piszcz [mailto:jpiszcz@...idpixels.com]
> Sent: Tuesday, November 27, 2012 8:56 AM
> To: 'Bjorn Helgaas'
> Cc: 'Bruno Prémont'; support@...ermicro.com; linux-kernel@...r.kernel.org;
> 'Dan Williams'
> Subject: RE: Supermicro X9SRL-F - channel enumeration error & ACPI/firmware
> bug question
>
>
>> It is _not_ working on the:
>
>> 2) Supermicro X8DTH-F (the boot drive in this system is running off a
> PCI-e
>> card, could the IRQ for the I/O controller be getting re-mapped and
> fail?)--
>> worse case I can move the SSD from the 6.0gbpa SATA card to the
> motherboard
>> and see if that works, but that kind of defeats the purpose of a 6.0gbps
>> SATA SSD.
>
> When I removed the Highpoint 2-port SATA card and plugged it into the
> motherboard, the system boots (plugged the SSD into the motherboard).
> So if you use a HIGHPOINT 2-PORT SATA 6.0gbps card, do NOT enable IOMMU or
> it will fail to initialize the Highpoint 2-port SATA controller card!
> I also tried upgrading the BIOS (of the mobo, no diff)
> I also tried just leaving the SATA card in and plugging it into the
> motherboard (no diff)
> Removed the Highpoint 2-port SATA card and then success, it would be nice to
> use that card with IOMMU support though, is it just not compatible
> (marvell-problem?) or is a driver bug?  Based on the pictures/etc sent
> earlier?

I would guess this is a core bug, but it's hard to tell without more
information.

If you boot with "intel_iommu=off", I would guess the Highpoint card
would work (this should have the same effect as turning off
CONFIG_INTEL_IOMMU).  I'd like to compare the complete dmesg log for
that boot with the one that fails.

It sounds like it might be hard to collect the log for the failing
case -- you said the boot fails when the Highpoint card is in the
system even if the SSD is connected to the motherboard instead of the
Highpoint card.  The panic in the photo2 image looks like it's just a
failure to mount the root filesystem, which is what I'd expect if we
can't find the SSD.  It seems like we ought to be able to *boot* with
the SSD connected to the motherboard, even if the Highpoint card
doesn't work.  But worst-case, a video of the failing boot might be
enough, especially if you can slow it down with "boot_delay="

> $ dmesg|grep -i iommu
> [    0.055134] dmar: IOMMU 0: reg_base_addr cfdfe000 ver 1:0 cap
> c90780106f0462 ecap f020f6
> [    0.055396] dmar: IOMMU 1: reg_base_addr fecfe000 ver 1:0 cap
> c90780106f0462 ecap f020f6
> [    0.760665] IOMMU 0 0xcfdfe000: using Queued invalidation
> [    0.760803] IOMMU 1 0xfecfe000: using Queued invalidation
> [    0.760937] IOMMU: Setting RMRR:
> [    0.761102] IOMMU: Setting identity map for device 0000:00:1d.0
> [0xbf7ec000 - 0xbf7fffff]
> [    0.761329] IOMMU: Setting identity map for device 0000:00:1d.1
> [0xbf7ec000 - 0xbf7fffff]
> [    0.761542] IOMMU: Setting identity map for device 0000:00:1d.2
> [0xbf7ec000 - 0xbf7fffff]
> [    0.761758] IOMMU: Setting identity map for device 0000:00:1d.7
> [0xbf7ec000 - 0xbf7fffff]
> [    0.761974] IOMMU: Setting identity map for device 0000:00:1a.0
> [0xbf7ec000 - 0xbf7fffff]
> [    0.762190] IOMMU: Setting identity map for device 0000:00:1a.1
> [0xbf7ec000 - 0xbf7fffff]
> [    0.762407] IOMMU: Setting identity map for device 0000:00:1a.2
> [0xbf7ec000 - 0xbf7fffff]
> [    0.762620] IOMMU: Setting identity map for device 0000:00:1a.7
> [0xbf7ec000 - 0xbf7fffff]
> [    0.762816] IOMMU: Setting identity map for device 0000:00:1d.0 [0xec000
> - 0xeffff]
> [    0.763010] IOMMU: Setting identity map for device 0000:00:1d.1 [0xec000
> - 0xeffff]
> [    0.763197] IOMMU: Setting identity map for device 0000:00:1d.2 [0xec000
> - 0xeffff]
> [    0.763382] IOMMU: Setting identity map for device 0000:00:1d.7 [0xec000
> - 0xeffff]
> [    0.763567] IOMMU: Setting identity map for device 0000:00:1a.0 [0xec000
> - 0xeffff]
> [    0.763749] IOMMU: Setting identity map for device 0000:00:1a.1 [0xec000
> - 0xeffff]
> [    0.763934] IOMMU: Setting identity map for device 0000:00:1a.2 [0xec000
> - 0xeffff]
> [    0.764127] IOMMU: Setting identity map for device 0000:00:1a.7 [0xec000
> - 0xeffff]
> [    0.764311] IOMMU: Prepare 0-16MiB unity mapping for LPC
> [    0.764465] IOMMU: Setting identity map for device 0000:00:1f.0 [0x0 -
> 0xffffff]
>
> --
>
>
> ==> Further issues with the X9SRL-F -- does this board support ASPM or is
> this a Linux/ASPM implementation issue?
> [    0.632170]  pci0000:ff: ACPI _OSC support notification failed, disabling
> PCIe ASPM
> [    0.632239]  pci0000:ff: Unable to request _OSC control (_OSC support
> mask: 0x08)

I'm going to ignore this issue for the time being.  I know we complain
about this on many machines, and I don't know whether it's a real
problem or just an overly alarming message.

Bjorn
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