From: Jeff Garzik <jgarzik@pobox.com>
To: "zhao, forrest" <forrest.zhao@intel.com>
Cc: Tejun Heo <htejun@gmail.com>, Alan Cox <alan@lxorguk.ukuu.org.uk>,
axboe@htj.dyndns.org, Albert Lee <albertcc@tw.ibm.com>,
Lukasz Kosewski <lkosewsk@gmail.com>,
linux-ide@vger.kernel.org
Subject: Re: updated new EH and hotplug support are about to be posted...
Date: Thu, 13 Apr 2006 23:30:56 -0400 [thread overview]
Message-ID: <443F1770.1040403@pobox.com> (raw)
In-Reply-To: <1144982795.19687.35.camel@localhost.localdomain>
zhao, forrest wrote:
> BTW. Is there a way to check whether SATA controller support
> hotplug, such as a capability bit in certain register?
For AHCI, all controllers support hotplug.
Most SATA controllers support hotplug, across all vendors.
If you're lucky, silicon has a phy interrupt. If you're somewhat lucky,
silicon has a PhyRdy state interrupt. If you're stuck with a BMDMA
interface with bolted-on SATA PHY registers, hotplug will -probably- work.
> Or we have to first enable PHY status changed interrupt, then
> hotplug the SATA disk, then to check if the interrupt is triggered,
> and PHY RDY status changes?
The interrupt is quite helpful, but ultimately optional.
Jeff
prev parent reply other threads:[~2006-04-14 3:31 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-04-11 13:08 updated new EH and hotplug support are about to be posted Tejun Heo
2006-04-14 2:46 ` zhao, forrest
2006-04-14 3:30 ` Jeff Garzik [this message]
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