From: Jeff Garzik <jgarzik@pobox.com>
To: Tejun Heo <htejun@gmail.com>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>,
Albert Lee <albertcc@tw.ibm.com>, Jens Axboe <axboe@suse.de>,
Edward Falk <efalk@google.com>,
Carlos Pardo <Carlos.Pardo@siliconimage.com>,
Raymond Liu <Raymond.Liu@siliconimage.com>,
"linux-ide@vger.kernel.org" <linux-ide@vger.kernel.org>
Subject: Re: [ANNOUNCE] libata EH/NCQ/hotplug/PM git tree
Date: Fri, 12 May 2006 23:37:58 -0400 [thread overview]
Message-ID: <44655496.9030402@pobox.com> (raw)
In-Reply-To: <44653807.3030101@gmail.com>
Tejun Heo wrote:
> Jeff Garzik wrote:
>> Tejun Heo wrote:
>>> tested. I implemented AHCI PM support half-way but then realized I
>>> don't have any AHCI controller which supports PM (I have ICH7R). Is
>>> there any AHCI controller which reports PM support?
>>
>> You can always use SCR-based PM support...
>>
>
> Can you elaborate a bit?
Sections A.1 and 6.1 of the PM spec. You set the PMP field of the
SControl register. This has obvious parallelism limitations, which is
why "hardware context switching support" aka native PM support is
greatly preferred.
> @ welcome back.
Thanks! :)
Jeff, learning to type with a ring on the finger
next prev parent reply other threads:[~2006-05-13 3:38 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-05-10 1:44 [ANNOUNCE] libata EH/NCQ/hotplug/PM git tree Tejun Heo
2006-05-10 4:51 ` zhao, forrest
2006-05-10 5:17 ` Tejun Heo
2006-05-10 5:36 ` zhao, forrest
2006-05-10 6:29 ` Raz Ben-Jehuda(caro)
2006-05-10 6:33 ` Tejun Heo
2006-05-10 13:37 ` Shem Multinymous
2006-05-10 16:44 ` Shem Multinymous
2006-05-11 3:09 ` zhao, forrest
2006-05-11 7:07 ` Tejun Heo
2006-05-13 1:30 ` Jeff Garzik
2006-05-13 1:36 ` Tejun Heo
2006-05-13 3:37 ` Jeff Garzik [this message]
2006-05-13 3:59 ` Tejun Heo
2006-05-13 4:09 ` Jeff Garzik
2006-05-13 4:19 ` Tejun Heo
2006-05-13 10:02 ` Stefan Smietanowski
2006-05-13 10:20 ` Tejun Heo
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