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

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Date:	Wed, 28 Nov 2012 18:34:45 -0600
From:	Robert Hancock <hancockrwd@...il.com>
To:	Justin Piszcz <jpiszcz@...idpixels.com>
CC:	'Bjorn Helgaas' <bhelgaas@...gle.com>,
	'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 11/27/2012 07:49 AM, Justin Piszcz wrote:
>
>> It looks like maybe you don't have CONFIG_PCI_MMCONFIG turned on?
>
> ===> FOR I/OAT DMA
> Latest status, it _appears_ its working on the X9SRL-F now, thank you!
>
> 1) Supermicro X9SRL-F (GOOD)
> [    0.738510] ioatdma: Intel(R) QuickData Technology Driver 4.00
> [    0.738719] ioatdma 0000:00:04.0: irq 75 for MSI/MSI-X
> [    0.739088] ioatdma 0000:00:04.1: irq 76 for MSI/MSI-X
> [    0.739408] ioatdma 0000:00:04.2: irq 77 for MSI/MSI-X
> [    0.739739] ioatdma 0000:00:04.3: irq 78 for MSI/MSI-X
> [    0.740040] ioatdma 0000:00:04.4: irq 79 for MSI/MSI-X
> [    0.740342] ioatdma 0000:00:04.5: irq 80 for MSI/MSI-X
> [    0.740670] ioatdma 0000:00:04.6: irq 81 for MSI/MSI-X
> [    0.740971] ioatdma 0000:00:04.7: irq 82 for MSI/MSI-X
>
> 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.
>
> (Fails to talk to the SSD)
> http://home.comcast.net/~jpiszcz/20121127/photo1-resize.jpg
>
> (then, a few moments later: Kernel panic)
> http://home.comcast.net/~jpiszcz/20121127/photo2-resize.jpg
>
> Would be curious if anyone had any suggestions besides removing the
> controller card?

What does lspci -vv show on that controller? Not sure what actual 
chipset that controller is, but there's a known issue with some Marvell 
6Gbps SATA controllers with DMAR enabled - it seems the device issues 
memory read/write requests from the wrong PCI function ID and the IOMMU 
rightly denies access as the function listed in the requests doesn't 
have any mapping to that memory. I don't think there's presently a 
workaround other than disabling DMAR. We could (and likely should) be 
detecting that device and adding some kind of quirk for it.

>
> --
>
>
> ==> 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)

What's the full dmesg from this machine (or is it already posted somewhere)?
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