From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jeff Garzik Subject: Re: Promise TX4 + SiI 3726 : only one disk visible Date: Mon, 15 May 2006 19:40:34 -0400 Message-ID: <44691172.8040402@pobox.com> References: <6EB652BF05BEE44FA2A29B23F3A71528045B3857@UBIMAIL1.ubisoft.org> <44690D90.2030208@gmail.com> 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]:27603 "EHLO mail.dvmed.net") by vger.kernel.org with ESMTP id S1750782AbWEOXki (ORCPT ); Mon, 15 May 2006 19:40:38 -0400 In-Reply-To: <44690D90.2030208@gmail.com> Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: Tejun Heo Cc: Jerome Vuarand , linux-ide@vger.kernel.org, jerome.vuarand@gmail.com Tejun Heo wrote: > PMP support requires support from low-level drivers (sata_sil24, > sata_promise,...) and sata_promise doesn't have it yet. As noted above, > the only supported card is SiI3124/32 and I'm working on AHCI. As for > sata_promise, I don't know. I don't have the card nor the document, so > it won't come out of me. Jeff is planning to work on sata_promise and > he might also do PM stuff, I guess. FWIW, for sata_promise (PDC205xx): I just looked in the docs, for Port Multiplier stuff. There is a single vendor-proprietary 4-bit "PM port" MMIO register for each channel (aka each SATA port). You may program this register only when the port is idle, no active commands nor DMA. Jeff