From: Jeff Garzik <jgarzik@pobox.com>
To: Tejun Heo <htejun@gmail.com>
Cc: alan@lxorguk.ukuu.org.uk, lkml@rtr.ca, axboe@suse.de,
forrest.zhao@intel.com, linux-ide@vger.kernel.org
Subject: Re: [PATCHSET] libata: implement runtime link powersave
Date: Wed, 19 Jul 2006 15:38:13 -0400 [thread overview]
Message-ID: <44BE8A25.9060804@pobox.com> (raw)
In-Reply-To: <11531191512028-git-send-email-htejun@gmail.com>
Tejun Heo wrote:
> Hello, all.
>
> This is the first take of powersave patchset. It implements runtime
> link-level power management. To avoid confusion with regular
> device/controller power management (suspend/resume), it's callsed
> powersave. It primarily implements partial/slumber/phy-off power
> states SATA standard specifies but if LLD has different way of
> implementing link powersave, it's allowed to. Both host-initiated and
> device-initiated operations are supported.
>
> This patchset contains the following patches.
>
> #01-07 : misc fixes/preps for powersave
> #08-10 : implements core powersave infrastructure
> #11-12 : implement powersave feature for ahci and sata_sil24
>
> Powersave can be configured at boot time or while running by writing
> to kernel module parameter /sys/module/libata/parameters/powersave.
> The following powersave modes are supported.
>
> * none : no powersave, link is powered up all the time
> * HIPS : host-initiated powersave
> * DIPS : device-initiated powersave
> * static : no powersave on occupied link, power off empty link
> * HIPS/static : HIPS on occupied link, power off empty link
> * DIPS/static : DIPS on occupied link, power off empty link
>
> For more information, please read head messages of individual patches.
>
> All supported modes are tested on ICH7R AHCI, ICH6M AHCI, SiI3124,
> SiI3132. Unfortunately SiI3112/4 family controllers don't support
> HIPS and choke on DIPS and thus dropped from supported list.
Any chance you tried ata_piix static PS, using PCS register? :)
Jeff
next prev parent reply other threads:[~2006-07-19 19:38 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-07-17 6:52 [PATCHSET] libata: implement runtime link powersave Tejun Heo
2006-07-17 6:52 ` [PATCH 03/12] libata: add more SATA specific constants and macros to ata.h Tejun Heo
2006-07-19 19:32 ` Jeff Garzik
2006-07-17 6:52 ` [PATCH 04/12] libata: implement ata_all_ports list Tejun Heo
2006-07-19 19:34 ` Jeff Garzik
2006-07-17 6:52 ` [PATCH 02/12] libata: add ata_id_has_sata() and use it in ata_id_has_ncq() Tejun Heo
2006-07-17 6:52 ` [PATCH 01/12] libata: add msec_to_jiffies() Tejun Heo
2006-07-17 6:52 ` [PATCH 06/12] libata: add ata_port_nr_ready() Tejun Heo
2006-07-17 6:52 ` [PATCH 10/12] libata: implement standard powersave methods Tejun Heo
2006-07-19 19:50 ` Jeff Garzik
2006-07-17 6:52 ` [PATCH 08/12] libata: implement interface power management infrastructure Tejun Heo
2006-07-19 19:45 ` Jeff Garzik
2006-07-24 8:02 ` Tejun Heo
2006-07-17 6:52 ` [PATCH 11/12] ahci: implement link powersave Tejun Heo
2006-07-19 19:51 ` Jeff Garzik
2006-07-17 6:52 ` [PATCH 07/12] libata: implement sata_update_scontrol() Tejun Heo
2006-07-19 19:35 ` Jeff Garzik
2006-07-17 6:52 ` [PATCH 05/12] libata: make counting functions global Tejun Heo
2006-07-17 6:52 ` [PATCH 09/12] libata: implement powersave timer Tejun Heo
2006-07-19 19:48 ` Jeff Garzik
2006-07-19 20:22 ` Jens Axboe
2006-07-24 7:27 ` Tejun Heo
2006-07-25 8:01 ` Jens Axboe
2006-07-17 6:52 ` [PATCH 12/12] sata_sil24: implement link powersave Tejun Heo
2006-07-19 19:38 ` Jeff Garzik [this message]
2006-07-24 7:33 ` [PATCHSET] libata: implement runtime " Tejun Heo
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