From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jeff Garzik Subject: Re: [RFC] add DMA setup FIS auto-activate feature Date: Thu, 23 Jul 2009 02:48:08 -0400 Message-ID: <4A6807A8.30403@pobox.com> References: <1248320734.9035.22.camel@sli10-desk.sh.intel.com> <4A67E00F.40808@pobox.com> <20090723054007.GA7473@sli10-desk.sh.intel.com> <4A67F8ED.2070204@kernel.org> <4A67FE1A.1050408@pobox.com> <4A67FF56.5040708@kernel.org> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from srv5.dvmed.net ([207.36.208.214]:33267 "EHLO mail.dvmed.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753427AbZGWGsL (ORCPT ); Thu, 23 Jul 2009 02:48:11 -0400 In-Reply-To: <4A67FF56.5040708@kernel.org> Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: Tejun Heo Cc: Shaohua Li , linux-ide Tejun Heo wrote: > Jeff Garzik wrote: >> AA was added in SATA II, and the SATA II specs specifically mention that >> AA was not present in SATA 1.0. > > Yeap, it wasn't in SATA 1.0 but it was in ahci 1.0 so _theoretically_ > all ahcis should be fine with it. We can introduce ATA_FLAG_FPDMA_AA > and let the drivers set it. Yep -- that was the logical conclusion of my rhetorical question at the beginning of this thread ;-) Jeff