[cgl_discussion] [Fwd: hotswap and CGL (fwd)]

[Rusty Lynch]

On Wed, 2003-04-30 at 12:58, Mika Kukkonen wrote:
> Please use cgl_discussion for CGL related questions; info at osdl.org
> is something totally different ...
> 
> What comes to your question, there already is a lot of hotswap
> functionality in 2.5 kernel, here is one place to look for
> information:
> 	http://linux-hotplug.sourceforge.net/?selected=pci
> 
> Of course some of the CGL compliant distros have implemented
> additional stuff on top of that; I'll let them to comment on that.
> 
> --MiKu
> 
> -----Forwarded Message-----
> 
> > From: Bryce Harrington <bryce at osdl.org>
> > To: mika at osdl.org
> > Cc: info at osdl.org
> > Subject: hotswap and CGL (fwd)
> > Date: 30 Apr 2003 12:03:08 -0700
> > 
> > 
> > 
> > ---------- Forwarded message ----------
> > Date: Wed, 30 Apr 2003 11:58:55 -0700
> > From: "Bloch, Jack" <Jack.Bloch at icn.siemens.com>
> > To: "'info at osdl.org'" <info at osdl.org>
> > Subject: hotswap and CGL
> > 
> > I am a developer at Siemens. We are validating CGL for use in a project.
> > Hotswap is for us an extremely important feature. Is there any description
> > of how the proposal will work for a cPCI environment? I have reasd the OSDL
> > documents and do not find a description.
> > 
> > Jack Bloch
> > Siemens ICN
> > phone                (561) 923-6550
> > e-mail                jack.bloch at icn.siemens.com

The kernel hotswap infrastructure was extended in the 2.5 kernel to
support cPCI. 

Some specific info:
* The code can be found in linux/drivers/hotplug/cpci_* 
* Scott Murry <scottm at somanetworks.com> maintains the cpci specific
source, and Greg Kroah-Hartman <greg at kroah.com> is the owner of the
entire hotswap infrastructure.
* The infrastructure allows a hotswap system to be design like PICMG
describes by writing a user space component to interface with the
hotswap infrastructure via sysfs.  (Scott published a GPL version of
such a user space component, but I do not recall the URL.)

    --rustyl