From mboxrd@z Thu Jan 1 00:00:00 1970 From: Luben Tuikov Subject: Re: [PATCH 1/4] sas: add flag for locally attached PHYs Date: Fri, 21 Oct 2005 14:57:54 -0400 Message-ID: <43593A32.7040802@adaptec.com> References: <91888D455306F94EBD4D168954A9457C048F0E34@nacos172.co.lsil.com> <20051020160155.GA14296@lst.de> <4357CB03.4020400@adaptec.com> <20051020170330.GA16458@lst.de> <4357F7DE.7050004@adaptec.com> <1129852879.30258.137.camel@bluto.andrew> <1129885586.2786.12.camel@laptopd505.fenrus.org> <1129914336.30258.179.camel@bluto.andrew> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Return-path: Received: from magic.adaptec.com ([216.52.22.17]:64910 "EHLO magic.adaptec.com") by vger.kernel.org with ESMTP id S965093AbVJUS6I (ORCPT ); Fri, 21 Oct 2005 14:58:08 -0400 In-Reply-To: <1129914336.30258.179.camel@bluto.andrew> Sender: linux-scsi-owner@vger.kernel.org List-Id: linux-scsi@vger.kernel.org To: andrew.patterson@hp.com Cc: Arjan van de Ven , linux-scsi@vger.kernel.org, jejb@steeleye.com, "Moore, Eric Dean" , Christoph Hellwig On 10/21/05 13:05, Andrew Patterson wrote: >>but why didn't CSMI specify the library interface then? If it did that, >>then none of the "ioctls are deprecated for 3 years now" would have come >>as a surprise. Or rather, it maybe would have, but it wouldn't have >>mattered to the management app. > > I asked one of the authors, Steve Fairchild, about this. He said that > they had had a bad experience with HBAAPI, the FC library. They had a > lot of problems with vendors keeping the library up to date, multiple > vendors shipping multiple incompatible versions, etc. I wasn't entirely > convinced, since they seem to have just replaced one set of problems for > another. The user app would read the SDI major and minor from SDI_GET_DRIVER_INFO and then know which spec to use. After that just sending bytes of data (forming units) one after the other (as in "smp_portal") would suffice for 32/64 bit (similarly to SG). Luben -- http://linux.adaptec.com/sas/ http://www.adaptec.com/sas/