Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1760097AbYBORze (ORCPT ); Fri, 15 Feb 2008 12:55:34 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1756002AbYBORz0 (ORCPT ); Fri, 15 Feb 2008 12:55:26 -0500 Received: from wa-out-1112.google.com ([209.85.146.182]:31585 "EHLO wa-out-1112.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755483AbYBORzY (ORCPT ); Fri, 15 Feb 2008 12:55:24 -0500 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:from:to:subject:cc:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references; b=nxvPvbljz2Zn2z7FcMpdwBM9w9uHW2nMom8gknT5Rrr7XuwopJjaAYOHGhjcVAPFqKMnkoj2Z6Sn3GqSrfXU6eFBNpg500BKsU+ubgZvw4CRsKztM6fb5ulG/c/PINNBzPOko0g+BIWn+EjFeMkiAO1CkKGoawRBZJmi0idHC98= Message-ID: <4779de450802150955m17c42d96j809804c3c0b99a4@mail.gmail.com> Date: Fri, 15 Feb 2008 09:55:24 -0800 From: "Dan Gora" To: "Andi Kleen" Subject: Re: PCI Bursting with PIO Cc: linux-kernel@vger.kernel.org In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Content-Disposition: inline References: <4779de450802141928led16cebkfb989551eb88a8cb@mail.gmail.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 801 Lines: 24 On Fri, Feb 15, 2008 at 2:54 AM, Andi Kleen wrote: > "Dan Gora" writes: > > > > Is there any way to get PIO > > I assume you really mean MMIO, not PIO. PIO would be port IO. Sorry, I always saw it referred to as "Programmed I/O" as opposed to DMA... > You should set the MMIO mapping to write combining using an MTRR Sorry to be thick here, but how would I go about doing that? > You might need to add appropiate memory barriers if you rely > on write ordering though. Ok, thanks for the info... 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/