From mboxrd@z Thu Jan  1 00:00:00 1970
From: Joerg Roedel <joro@8bytes.org>
Subject: Re: Supermicro X9SRL-F - channel enumeration error & ACPI/firmware
 bug question
Date: Sun, 2 Dec 2012 14:26:49 +0100
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To: Bjorn Helgaas <bhelgaas@google.com>
Cc: Robert Hancock <hancockrwd@gmail.com>, Justin Piszcz <jpiszcz@lucidpixels.com>, Bruno =?iso-8859-1?Q?Pr=E9mont?= <bonbons@linux-vserver.org>, support@supermicro.com, linux-kernel@vger.kernel.org, Dan Williams <djbw@fb.com>, Jeff Garzik <jgarzik@pobox.com>, linux-ide@vger.kernel.org, David Woodhouse <dwmw2@infradead.org>, iommu@lists.linux-foundation.org
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On Thu, Nov 29, 2012 at 08:38:53PM -0700, Bjorn Helgaas wrote:
> That's essentially the patch at
> https://bugzilla.redhat.com/show_bug.cgi?id=757166#c16, which in my
> opinion is too ugly to consider.  But fortunately, I'm not the
> maintainer for any IOMMU drivers.

There is a quirk infrastructure for those kinds of broken devices in
drivers/pci/quirks.c. Have a look into the function
pci_get_dma_source(). This function is used by the IOMMU drivers to
create the correct mappings.


	Joerg