Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1763840AbXIMQ0P (ORCPT ); Thu, 13 Sep 2007 12:26:15 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751770AbXIMQ0A (ORCPT ); Thu, 13 Sep 2007 12:26:00 -0400 Received: from wx-out-0506.google.com ([66.249.82.227]:50223 "EHLO wx-out-0506.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751268AbXIMQZ7 (ORCPT ); Thu, 13 Sep 2007 12:25:59 -0400 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=beta; h=received:message-id:date:from:sender:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references:x-google-sender-auth; b=HB+vOuy/bwd3Oafd6Vr+pPAjI3QIvkleUyySreYpEv6Kd+n96fssPlE2V/RfFPnHnQDIWMsCXWna/W5nfrdWp0qiPuA40XG4au1yBLL2b/6z22USTpjvsAz7akCk7fiUQFSsodC5vbkcCKfasGdoRrkco5H6QceaIO18JH06tW4= Message-ID: Date: Thu, 13 Sep 2007 09:25:57 -0700 From: "Dan Williams" To: "Zhang Wei-r63237" Subject: Re: [PATCH 5/5] Add DMA engine driver for Freescale MPC85xxprocessors. Cc: "Wood Scott-B07421" , paulus@samba.org, shannon.nelson@intel.com, linuxppc-dev@ozlabs.org, linux-kernel@vger.kernel.org In-Reply-To: <46B96294322F7D458F9648B60E15112C85D8A5@zch01exm26.fsl.freescale.net> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <11891624582950-git-send-email-wei.zhang@freescale.com> <20070907223553.GA18599@freescale.com> <46B96294322F7D458F9648B60E15112C85D8A5@zch01exm26.fsl.freescale.net> X-Google-Sender-Auth: 303d0a360e1eb95a Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 840 Lines: 28 On 9/13/07, Zhang Wei-r63237 wrote: > Hi, > > > > +static void fsl_dma_set_src(dma_addr_t addr, > > > + struct dma_async_tx_descriptor > > *tx, int index) > > > +{ > > > > What is index supposed to mean? It's not used, or documented > > anywhere than > > I can see. > > I've also got more document here. Hi, Dan, could you give me some > explanation about this API? :) > The index field gets used for multi-source (or multi-dest) operations. XOR, for example, is a multi-source operation. I am preparing a documentation patch. [..] -- Dan - 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/