RE: Discarding Delayed Completion in PCI

[Tony Clark <Tony.Clark@EFI.COM>]

Priya,

As a delayed transaction, it is guaranteed that the exact transaction will
be retried by the initiator.  Because the space is prefetchable, there are
no side effects of the read.  So if the target has some reason that it must
discard the data, it may do so.  When the initiator retries the transaction
the target can treat it as if it were a new transaction with no harm done
(except for wasting bus capacity).

Tony Clark

 
> -----Original Message-----
> From: Priya Chopra [mailto:priya.chopra@dcmtech.co.in]
> Sent: Wednesday, December 04, 2002 12:45 AM
> To: pci-sig@znyx.com
> Subject: Discarding Delayed Completion in PCI
> 
> 
> hi,
> 
> Can anyone let me know  why a delayed completion can be 
> discarded when it is 
> a read from a prefetchable region.
> 
> Thanks
> Priya
> 
>