RE: CPCI: RE: Message Signalled Interrupt Support

["Somes, Richard" <Richard.Somes@compaq.com>]

Brroks, Brad, etc.

Take a look at Force's Sentinel technology.  It's a universal bridge which
supports MSI, and it's being used on a PPC board capable of functioning in
either system or peripheral slots.

So here's one hardware vendor with support.  See the following link:

http://www.forcecomputers.com/technology/sentinel/sentinel.htm

Sorry for the commercial, but it's responsive to the question.  Hopefully
others will be equally unabashed in identifying products with MSI.

I'm not sure whether PICMG 2.14, the Multicomputing spec, identifies MSI as
a signalling mechanism.  With the advent of real hardware supporting MSI, it
should probably be considered.  Someone from the 2.14 crew with input?

Dick Somes

-----Original Message-----
From: Lame Brooks-G14738 [mailto:brooks.lame@motorola.com]
Sent: Monday, February 21, 2000 2:13 PM
To: 'brad@pc2.com'
Cc: 'PCISIGList'; PICMGCPCI Reflector (E-mail)
Subject: CPCI: RE: Message Signalled Interrupt Support


MSI appears extremely useful in applications with many sources of interrupts
in a device and/or many devices on the PCI bus.  It also looks useful in
slave processor applications.  Motorola may use MSI in a new motherboard
peripheral device currently under development.  However, I am a little out
of touch with the current thoughts on MSI with CompactPCI
peripheral/slave/multiple-host processors; so, you may look for some other
PICMG guys to respond.  
--
Brooks Lame'
Crisis/Design Engineer,  Motorola Monterey Design Center
brooks_lame@mcg.mot.com


> -----Original Message-----
> From: Brad Hosler [mailto:brad@pc2.com]
> Sent: Sunday, 20 February, 2000 15:29
> To: pci-sig@znyx.com
> Subject: Message Signalled Interrupt Support
> 
> 
> PCI 2.2 defines a Message Signalled Interrupt (MSI) feature, 
> to allow the
> card
> to issue an interrupt as a PCI write message.
> 
> Its presenting a "who-comes-first" scenario.  There are SW 
> developers that
> want to support this feature; however, they want to know if 
> there are IHV's
> who are adding support to their cards.  If there is no IHV 
> interest, SW
> support
> may be pulled due to lack of validation.
> 
> Are there any cards available or that will be available that 
> will support
> the MSI capability?
> 
> 
> 
>