Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758849AbZD1NpS (ORCPT ); Tue, 28 Apr 2009 09:45:18 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755910AbZD1NpE (ORCPT ); Tue, 28 Apr 2009 09:45:04 -0400 Received: from az33egw02.freescale.net ([192.88.158.103]:37801 "EHLO az33egw02.freescale.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756243AbZD1NpD (ORCPT ); Tue, 28 Apr 2009 09:45:03 -0400 Message-ID: <49F707FA.7070603@freescale.com> Date: Tue, 28 Apr 2009 08:43:22 -0500 From: Timur Tabi User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1b3pre) Gecko/20090327 SeaMonkey/2.0a3 MIME-Version: 1.0 To: David Hawkins CC: Liu Dave-R63238 , linuxppc-dev@ozlabs.org, Dan Williams , linux-kernel@vger.kernel.org, Ira Snyder Subject: Re: [PATCH] fsldma: use PCI Read Multiple command References: <20090424183517.GB23140@ovro.caltech.edu> <49F65DBA.2090702@ovro.caltech.edu> In-Reply-To: <49F65DBA.2090702@ovro.caltech.edu> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit X-Brightmail-Tracker: AAAAAQAAAWE= Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 727 Lines: 21 David Hawkins wrote: >> How about FIFO RAM case? > > If the FIFO has a fixed address, then according to > the user guide, the DMA controller won't generate > a burst transaction to it. > > We can try confirming this if you'd like. Like I said earlier, this driver does not support copying data to/from a single register address. It's just a off-loaded memcpy. So we don't need to worry about what happens to a fixed address. -- Timur Tabi Linux kernel developer at Freescale -- 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/