Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S261300AbVE2Q7w (ORCPT ); Sun, 29 May 2005 12:59:52 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S261357AbVE2Q7e (ORCPT ); Sun, 29 May 2005 12:59:34 -0400 Received: from mail.dvmed.net ([216.237.124.58]:30439 "EHLO mail.dvmed.net") by vger.kernel.org with ESMTP id S261290AbVE2Q7S (ORCPT ); Sun, 29 May 2005 12:59:18 -0400 Message-ID: <4299F4E2.4020305@pobox.com> Date: Sun, 29 May 2005 12:59:14 -0400 From: Jeff Garzik User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7.6) Gecko/20050328 Fedora/1.7.6-1.2.5 X-Accept-Language: en-us, en MIME-Version: 1.0 To: Erik Slagter CC: linux-kernel@vger.kernel.org, linux-ide@vger.kernel.org, Jens Axboe Subject: Re: Playing with SATA NCQ References: <20050526140058.GR1419@suse.de> <1117382598.4851.3.camel@localhost.localdomain> <4299EF16.2050208@pobox.com> <1117385429.4851.8.camel@localhost.localdomain> In-Reply-To: <1117385429.4851.8.camel@localhost.localdomain> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit X-Spam-Score: 0.0 (/) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1683 Lines: 49 Erik Slagter wrote: > On Sun, 2005-05-29 at 12:34 -0400, Jeff Garzik wrote: > >>>>Now, this patch is not complete. It should work and work well, but error >>>>handling isn't really tested or finished yet (by any stretch of the >>>>imagination). So don't use this on a production machine, it _should_ be >>>>safe to use on your test boxes and for-fun workstations though (I run it >>>>here...). I have tested on ich6 and ich7 generation ahci, and with >>>>Maxtor and Seagate drives. >>> >>>Is this supposed to work on ICH7 in legacy mode as well? >> >>Nope. ata_piix does not support NCQ (because the h/w doesn't support). > > > If I understand this correctly: NCQ does not work on ICH7 in native mode > (using ata_piix) because in this mode there is no NCQ available, right? To be more specific, there are these modes: legacy mode no NCQ combined mode no NCQ native mode no NCQ AHCI mode NCQ >>>Another question: is there a fundamental problem to have the ICH6/7 >>>enabled AHCI mode by the kernel instead of the BIOS? I know some BIOSes >>>don't offer the choice to enable AHCI (like mine :-(). >> >>Not a problem. You just don't get to use AHCI and such. > > > Huh? > > My question was if there is a fundamental reason why the AHCI mode of > the ICH6/7 must be enabled by the BIOS, is there a reason why the kernel > doesn't do it, or can't do it? The BIOS sets up PCI resources necessary to use AHCI mode. Jeff - 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/