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

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Date:	Tue, 27 Nov 2012 08:56:27 -0500
From:	"Justin Piszcz" <jpiszcz@...idpixels.com>
To:	"'Bjorn Helgaas'" <bhelgaas@...gle.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


> 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 IOMMU is disabled, I/OAT DMA is successful on the second motherboard
(X8DTH-6F).
Specifically:

--- DMA Engine support
[*]   Intel I/OAT DMA support
[*]   Network: TCP receive copy offload   
[*]   Async_tx: Offload support for the async_tx api

When IOMMU/X2APIC is enabled on the X8DTH-6F it fails to boot.
Will keep doing more testing to see if I get anywhere w/regards to the
IOMMU.

Proof of success:

[    0.757467] ioatdma: Intel(R) QuickData Technology Driver 4.00
[    0.757690] ioatdma 0000:00:16.0: irq 88 for MSI/MSI-X
[    0.757948] ioatdma 0000:00:16.1: irq 89 for MSI/MSI-X
[    0.758166] ioatdma 0000:00:16.2: irq 90 for MSI/MSI-X
[    0.758377] ioatdma 0000:00:16.3: irq 91 for MSI/MSI-X
[    0.758577] ioatdma 0000:00:16.4: irq 92 for MSI/MSI-X
[    0.758794] ioatdma 0000:00:16.5: irq 93 for MSI/MSI-X
[    0.759000] ioatdma 0000:00:16.6: irq 94 for MSI/MSI-X
[    0.759214] ioatdma 0000:00:16.7: irq 95 for MSI/MSI-X
[    0.759461] ioatdma 0000:80:16.0: irq 96 for MSI/MSI-X
[    0.759720] ioatdma 0000:80:16.1: irq 97 for MSI/MSI-X
[    0.759963] ioatdma 0000:80:16.2: irq 98 for MSI/MSI-X
[    0.760190] ioatdma 0000:80:16.3: irq 99 for MSI/MSI-X
[    0.760414] ioatdma 0000:80:16.4: irq 100 for MSI/MSI-X
[    0.760630] ioatdma 0000:80:16.5: irq 101 for MSI/MSI-X
[    0.760862] ioatdma 0000:80:16.6: irq 102 for MSI/MSI-X
[    0.761081] ioatdma 0000:80:16.7: irq 103 for MSI/MSI-X

--


==> 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)

Justin.







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