Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752668AbZINFgK (ORCPT ); Mon, 14 Sep 2009 01:36:10 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751524AbZINFgJ (ORCPT ); Mon, 14 Sep 2009 01:36:09 -0400 Received: from complete.lackof.org ([198.49.126.79]:43720 "EHLO complete.lackof.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751511AbZINFgI (ORCPT ); Mon, 14 Sep 2009 01:36:08 -0400 Date: Sun, 13 Sep 2009 23:36:10 -0600 From: Grant Grundler To: Mark Hounschell Cc: Alan Cox , linux-pci@vger.kernel.org, Mark Hounschell , linux-kernel@vger.kernel.org Subject: Re: problems doing direct dma from a pci device to pci-e device Message-ID: <20090914053610.GA5970@lackof.org> References: <4AAA5B1F.3020103@compro.net> <20090911154714.70a94454@lxorguk.ukuu.org.uk> <4AAA6BE7.8040306@compro.net> <4AAAAD30.4040704@compro.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <4AAAAD30.4040704@compro.net> X-Home-Page: http://www.parisc-linux.org/ User-Agent: Mutt/1.5.18 (2008-05-17) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 674 Lines: 14 On Fri, Sep 11, 2009 at 04:04:00PM -0400, Mark Hounschell wrote: > A quick readup on the IOMMU makes me think that if it does use one, that > could certainly cause my problem. I'm using bus addresses plugged into > page tables that live in the gpiohsd card obtained from virt2bus. If you haven't yet, take a look at Documentation/DMA-API.txt and DMA-mapping.txt . virt2bus has been deprecated for DMA since 2.4 releases. grant -- 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/