From: Jeff Garzik <jgarzik@pobox.com>
To: Matthew Garrett <mjg59@srcf.ucam.org>
Cc: Christoph Hellwig <hch@infradead.org>,
Alan Cox <alan@lxorguk.ukuu.org.uk>,
randy_d_dunlap@linux.intel.com, linux-ide@vger.kernel.org,
linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org,
acpi-devel@lists.sourceforge.net
Subject: Re: RFC: ACPI/scsi/libata integration and hotswap
Date: Fri, 09 Dec 2005 07:16:43 -0500 [thread overview]
Message-ID: <439975AB.5000902@pobox.com> (raw)
In-Reply-To: <20051209121124.GA25974@srcf.ucam.org>
Matthew Garrett wrote:
> On Fri, Dec 09, 2005 at 06:58:41AM -0500, Jeff Garzik wrote:
>
>
>>If this is for hotswap, as I noted, libata doesn't need this at all.
>>
>>If the hardware supports it, then libata will support it directly.
>>There is no ACPI-specific magic, because ACPI does nothing but talk to
>>the same hardware libata is talking to.
>
>
> If libata knows how to talk to the random hardware attached to a Dell
> laptop hotswap bay, I'll be amazed. Ejecting the drive generates a
> system management interrupt, which then causes the ACPI code to check a
> register in a block of machine-specific registers and generate an ACPI
> notification. As far as I can tell, the controller has no say in the
> matter at all - the Intel specs seem to suggest that ICH6 doesn't
> generate a hotswap interrupt unless you're using AHCI (which this
> hardware doesn't).
libata will immediately notice the ejection without ACPI's help.
Jeff
next prev parent reply other threads:[~2005-12-09 12:16 UTC|newest]
Thread overview: 74+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-12-08 3:02 RFC: ACPI/scsi/libata integration and hotswap Matthew Garrett
2005-12-08 9:15 ` Christoph Hellwig
2005-12-08 13:26 ` Matthew Garrett
2005-12-08 13:33 ` Christoph Hellwig
2005-12-08 13:39 ` Matthew Garrett
2005-12-08 13:44 ` Christoph Hellwig
2005-12-08 17:18 ` Erik Slagter
2005-12-08 20:43 ` Jeff Garzik
2005-12-08 21:03 ` Dominic Ijichi
2005-12-08 21:09 ` Jeff Garzik
[not found] ` <4398A0F9.9050900-e+AXbWqSrlAAvxtiuMwx3w@public.gmane.org>
2005-12-08 21:34 ` Dominic Ijichi
2005-12-08 21:34 ` Dominic Ijichi
2005-12-08 21:31 ` Randy Dunlap
2005-12-09 9:45 ` Erik Slagter
2005-12-09 10:39 ` Jens Axboe
2005-12-09 10:45 ` Erik Slagter
2005-12-09 11:27 ` Jeff Garzik
2005-12-09 11:35 ` Erik Slagter
2005-12-09 11:40 ` Christoph Hellwig
2005-12-09 11:46 ` Jens Axboe
2005-12-09 11:55 ` Matthew Garrett
[not found] ` <20051209115511.GA25842-1xO5oi07KQx4cg9Nei1l7Q@public.gmane.org>
2005-12-09 13:22 ` Bartlomiej Zolnierkiewicz
2005-12-09 13:22 ` Bartlomiej Zolnierkiewicz
2005-12-09 12:01 ` Erik Slagter
[not found] ` <1134129692.27633.58.camel-bi+AKbBUZKY6gyzm1THtWbp2dZbC/Bob@public.gmane.org>
2005-12-09 12:07 ` Jens Axboe
2005-12-09 12:07 ` Jens Axboe
2005-12-10 2:19 ` Douglas Gilbert
[not found] ` <439A3B15.5010608-c4O3jRSCrQ+sTnJN9+BGXg@public.gmane.org>
2005-12-14 20:52 ` Matthew Wilcox
2005-12-14 20:52 ` [ACPI] " Matthew Wilcox
[not found] ` <1134125145.27633.32.camel-bi+AKbBUZKY6gyzm1THtWbp2dZbC/Bob@public.gmane.org>
2005-12-09 11:30 ` Jens Axboe
2005-12-09 11:30 ` Jens Axboe
2005-12-09 3:28 ` Mark Lord
2005-12-09 11:29 ` Jeff Garzik
[not found] ` <43996A84.5020307-e+AXbWqSrlAAvxtiuMwx3w@public.gmane.org>
2005-12-10 4:01 ` Mark Lord
2005-12-10 4:01 ` Mark Lord
2005-12-08 13:52 ` Jeff Garzik
2005-12-08 14:07 ` [ACPI] " Alan Cox
2005-12-08 14:14 ` Jeff Garzik
2005-12-08 14:30 ` Alan Cox
2005-12-08 14:43 ` Matthew Garrett
2005-12-08 14:53 ` Alan Cox
2005-12-09 11:42 ` Jeff Garzik
2005-12-08 14:12 ` Matthew Garrett
2005-12-08 14:01 ` Alan Cox
2005-12-08 14:18 ` Matthew Garrett
2005-12-08 14:33 ` Alan Cox
2005-12-08 14:52 ` Matthew Garrett
2005-12-08 14:55 ` Alan Cox
2005-12-08 17:19 ` Matthew Garrett
2005-12-09 11:42 ` Christoph Hellwig
[not found] ` <20051209114246.GB16945-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>
2005-12-09 11:49 ` Jeff Garzik
2005-12-09 11:49 ` Jeff Garzik
2005-12-09 11:52 ` Matthew Garrett
[not found] ` <20051209115235.GB25771-1xO5oi07KQx4cg9Nei1l7Q@public.gmane.org>
2005-12-09 11:58 ` Jeff Garzik
2005-12-09 11:58 ` Jeff Garzik
2005-12-09 12:11 ` Matthew Garrett
2005-12-09 12:16 ` Jeff Garzik [this message]
2005-12-09 12:24 ` Matthew Garrett
2005-12-10 0:40 ` Jeff Garzik
2005-12-10 2:34 ` Matthew Garrett
2005-12-10 2:39 ` Jeff Garzik
2005-12-10 2:47 ` Matthew Garrett
2005-12-10 2:41 ` Jeff Garzik
2005-12-10 2:50 ` Matthew Garrett
2005-12-10 2:57 ` Jeff Garzik
2005-12-10 3:47 ` [ACPI] " Andrew Grover
2005-12-12 0:38 ` Alan Cox
2005-12-09 11:50 ` Matthew Garrett
2005-12-09 11:55 ` Christoph Hellwig
2005-12-13 18:14 ` Randy Dunlap
2005-12-13 18:26 ` Matthew Garrett
2005-12-13 19:07 ` Randy Dunlap
2005-12-08 13:57 Salyzyn, Mark
2005-12-08 13:57 ` Salyzyn, Mark
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