From: "Paweł Żak" <pawel.zaq@gmail.com>
To: Chris Wright <chrisw@sous-sol.org>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Don Dutile <ddutile@redhat.com>,
linux-ide@vger.kernel.org, iommu@lists.linux-foundation.org,
bugzilla-daemon@bugzilla.kernel.org,
David Woodhouse <dwmw2@infradead.org>
Subject: Re: [Bug 42679] New: DMA Read on Marvell 88SE9128 fails when Intel's IOMMU is on
Date: Tue, 31 Jan 2012 00:44:04 +0100 [thread overview]
Message-ID: <op.v8w77qlcc3q55a@localhost> (raw)
In-Reply-To: <20120130233211.GM24091@sequoia.sous-sol.org>
On Tue, 31 Jan 2012 00:32:11 +0100, Chris Wright <chrisw@sous-sol.org>
wrote:
> * Paweł Żak (pawel.zaq@gmail.com) wrote:
>> On Mon, 30 Jan 2012 22:41:32 +0100, Don Dutile <ddutile@redhat.com>
>> wrote:
>> >Well, the lspci dump in the bugzilla report doesn't show a device
>> >w/BDF=0b:00.1;
>> >so, if the SATA device (which is 0b:00.0) is spitting out 0b:00.1
>> >as the source
>> >of any of its DMA packets, the IOMMU will fault on it, since
>> >0b:00.1 didn't
>> >request DMA mappings (0b:00.0 did).
>> >I semi-recall someone else reporting this 'feature' on this list.
>> >Wonder if pci-quirk has to filter this case (0b:00.0 on this system
>> means
>> >map for 0b:00.0 & 0b:00.1 -- ick!)
>> >
>> >do another lspci -vvv to ensure that 0b:00.1 wasn't excluded in the
>> list.
>> >if it doesn't exist, then the problem is the SATA device using an
>> >unknown/unrecognized
>> >BDF of 0b:00.1
>>
>> Yep, that's correct. I enabled all integrated peripherals on my
>> motherboard and there were still no entries with BDF 0b:00.1 in
>> lspci -vvv output. Should I take this problem to MSI then?
>
> Yeah, something is not right. Is there any BIOS control over that
> device?
As far as the BIOS is concerned I can only switch between:
- disabled,
- AHCI mode,
- IDE mode.
The problem occurs in both IDE and AHCI modes.
Apart from that I am also able to bring up RAID setup window for this
controller, right after turning the computer on, but since there are no
disks connected to it there's nothing I can alter.
Paweł
prev parent reply other threads:[~2012-01-30 23:44 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <bug-42679-27@https.bugzilla.kernel.org/>
[not found] ` <bug-42679-27-3bo0kxnWaOQUvHkbgXJLS5sdmw4N0Rt+2LY78lusg7I@public.gmane.org/>
2012-01-30 20:59 ` [Bug 42679] New: DMA Read on Marvell 88SE9128 fails when Intel's IOMMU is on Andrew Morton
[not found] ` <20120130125934.7971c815.akpm-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org>
2012-01-30 21:41 ` Don Dutile
2012-01-30 22:13 ` Paweł Żak
2012-01-30 23:32 ` Chris Wright
2012-01-30 23:44 ` Paweł Żak [this message]
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