From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from az33egw02.freescale.net (az33egw02.freescale.net [192.88.158.103]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client CN "az33egw02.freescale.net", Issuer "Thawte Premium Server CA" (verified OK)) by ozlabs.org (Postfix) with ESMTPS id 53D74DDEFA for ; Tue, 28 Apr 2009 23:45:00 +1000 (EST) Message-ID: <49F707FA.7070603@freescale.com> Date: Tue, 28 Apr 2009 08:43:22 -0500 From: Timur Tabi MIME-Version: 1.0 To: David Hawkins 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 Cc: linuxppc-dev@ozlabs.org, Dan Williams , Liu Dave-R63238 , linux-kernel@vger.kernel.org, Ira Snyder List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , 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