Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751617AbWIYW5L (ORCPT ); Mon, 25 Sep 2006 18:57:11 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751619AbWIYW5L (ORCPT ); Mon, 25 Sep 2006 18:57:11 -0400 Received: from h-66-166-126-70.lsanca54.covad.net ([66.166.126.70]:54999 "EHLO myri.com") by vger.kernel.org with ESMTP id S1751617AbWIYW5H (ORCPT ); Mon, 25 Sep 2006 18:57:07 -0400 Message-ID: <45185EB0.90300@ens-lyon.org> Date: Mon, 25 Sep 2006 18:56:48 -0400 From: Brice Goglin User-Agent: Thunderbird 1.5.0.5 (X11/20060812) MIME-Version: 1.0 To: Holger Kiehl CC: linux-kernel Subject: Re: Question regarding CONFIG_DMA_ENGINE References: In-Reply-To: X-Enigmail-Version: 0.94.0.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 861 Lines: 27 Holger Kiehl wrote: > Hello > > Is setting this option and CONFIG_NET_DMA usefull even when you do not > have > the hardware? > > And what hardware is required for this? Is this DMA engine located on > the network or raid card, or is this something in the chipset? Which > chipset or cards do have such an engine? > > Thanks, > Holger I guess the option is completely useless without such hardware. For now, you need a Intel E5000 chipset (Blackford and co.). It exports a special PCI device (id 8086:1a38) for DMA. No other device is supported so far, but some Raid stuff have been proposed recently IIRC. Brice - 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/