From: "Sy, Dely L" <dely.l.sy@intel.com>
To: linux-hotplug@vger.kernel.org
Subject: RE: pci-e hotplug on Intel SE7520HPAF2 board
Date: Tue, 08 Mar 2005 20:44:58 +0000 [thread overview]
Message-ID: <468F3FDA28AA87429AD807992E22D07E047DDCEC@orsmsx408> (raw)
In-Reply-To: <1110243507.30761.8.camel@duffman>
On Monday, March 07, 2005 4:58 PM, Tom Duffy wrote:
> I recently got the new hotplug board from Intel with the 7520
> (lindehurst) chipset.
> Hot removal seems to work OK. Before I pull the card, I see this on
> my lspci list:
> HOWEVER, I am not getting anything on hot insert.
When using acpiphp driver for hot-plug, one has to use attention button
to initiate power-up of the slot for there is no defined ACPI method
that
the acpiphp driver can call to power-up slot. The driver call _PS0 when
the user uses CLI (by echo 1 > /sys/pci/bus/slots/X). However, this
method is not defined to do the powering-up sequence for PCI hot-plug.
Maybe a standard method should be defined for such purpose so one can
use
CLI to power-up slot.
> > pciehp: acpi_pciehprm:\_SB_.PCI0.EPC0 OSHP fails=0x5
> > pciehp: acpi_pciehprm:\_SB_.PCI0.EPC0 OSHP fails=0x5
> >
> > Not sure what those messages are telling me...
> >
> It's telling you the firmware hasn't defined the ACPI OSHP methods
> for those hotpluggable slots. OSHP is used to tell firmware that
> the OS supports native pcie/shpc hotplug, so it shouldn't try to
> emulate acpi hotplug on the slot. Lack of this method is harmless
> if the firmware never supported acpi hotplug on this slot anyway.
As Rajesh mentioned, the OSHP method is called to gain control of native
hot-plug if the OS is ACPI enabled. 0x5 means that OSHP was not
implemented for those devices. The driver traverses the host-bridge and
p2p bridges and executes OSHP when it encountered hot-pluggable slots.
Don't know why this BIOS didn't implemented OSHP on hot-pluggable slots.
Can you check cat /proc/interrupts to see if interrupts occurred when
you
do hot-plug using pciehp?
Thanks,
Dely
-------------------------------------------------------
SF email is sponsored by - The IT Product Guide
Read honest & candid reviews on hundreds of IT Products from real users.
Discover which products truly live up to the hype. Start reading now.
http://ads.osdn.com/?ad_ide95&alloc_id\x14396&opÌk
_______________________________________________
Linux-hotplug-devel mailing list http://linux-hotplug.sourceforge.net
Linux-hotplug-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/linux-hotplug-devel
next prev parent reply other threads:[~2005-03-08 20:44 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-03-08 0:58 pci-e hotplug on Intel SE7520HPAF2 board Tom Duffy
2005-03-08 6:55 ` Greg KH
2005-03-08 17:09 ` Tom Duffy
2005-03-08 17:33 ` Greg KH
2005-03-08 18:02 ` Tom Duffy
2005-03-08 19:58 ` Rajesh Shah
2005-03-08 20:44 ` Sy, Dely L [this message]
2005-03-08 21:45 ` Tom Duffy
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=468F3FDA28AA87429AD807992E22D07E047DDCEC@orsmsx408 \
--to=dely.l.sy@intel.com \
--cc=linux-hotplug@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox