From: Arnd Bergmann <arnd@arndb.de>
To: linuxppc-dev@ozlabs.org
Subject: Re: [PATCH RFC v5] net: add PCINet driver
Date: Thu, 15 Jan 2009 23:53:24 +0100
User-Agent: KMail/1.9.9
Cc: Ira Snyder <iws@ovro.caltech.edu>, Jan-Bernd Themann <themann@de.ibm.com>,
       netdev@vger.kernel.org, Rusty Russell <rusty@rustcorp.com.au>,
       linux-kernel@vger.kernel.org, shemminger@vyatta.com,
       David Miller <davem@davemloft.net>
References: <20090107195052.GA24981@ovro.caltech.edu> <200901152222.55006.arnd@arndb.de> <20090115214056.GC9091@ovro.caltech.edu>
In-Reply-To: <20090115214056.GC9091@ovro.caltech.edu>
MIME-Version: 1.0
Content-Type: text/plain;
  charset="iso-8859-1"
Content-Transfer-Encoding: 7bit
Content-Disposition: inline
Message-Id: <200901152353.25052.arnd@arndb.de>
Sender: linux-kernel-owner@vger.kernel.org
Content-Length: 753
Lines: 17

On Thursday 15 January 2009, Ira Snyder wrote:
> I do have mailboxes (two inbound, two outbound) which can generate
> interrupts, as well as doorbell registers (one inbound, one outbound).
> The doorbell register's bits are "write 1 to clear", and can only be
> cleared by the opposite side.
> 

Ok, in this case, you should be able to use one of these to implement
the DMA complete interrupt, but adding an extra DMA transfer to the
mailbox after each transfer that you want to get notified for.

	Arnd <><
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/