From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tejun Heo Subject: Re: Is the SIL 3112 capable of PMP support? Date: Mon, 13 Nov 2006 23:03:40 +0900 Message-ID: <45587B3C.3080303@gmail.com> References: <455810BC.6090304@wasp.net.au> <45587548.7020808@garzik.org> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from wr-out-0506.google.com ([64.233.184.225]:44411 "EHLO wr-out-0506.google.com") by vger.kernel.org with ESMTP id S1754662AbWKMODu (ORCPT ); Mon, 13 Nov 2006 09:03:50 -0500 Received: by wr-out-0506.google.com with SMTP id i28so472878wra for ; Mon, 13 Nov 2006 06:03:50 -0800 (PST) In-Reply-To: <45587548.7020808@garzik.org> Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: Jeff Garzik Cc: Brad Campbell , linux-ide@vger.kernel.org Jeff Garzik wrote: > Brad Campbell wrote: >> I've been planning on doing some testing with PMP's and noticed that >> sata_sil does not support PMP. Is that a hardware limitation or just >> that nobody has implemented it in the driver yet ? > > Well, it doesn't support hardware context switching. It probably > supports PMP "the slow way" (one PMP-attached device at a time) I doubt 3112 can do pmp even "the slow way". It doesn't expose FIS interface nor does it have PMP field in its SControl register. It just can't generate PMP-aware FIS. -- tejun