From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.3 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,NICE_REPLY_A,SPF_HELO_NONE, SPF_PASS,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2E523C433B4 for ; Tue, 20 Apr 2021 02:16:35 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id ED74260C3D for ; Tue, 20 Apr 2021 02:16:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233599AbhDTCRD (ORCPT ); Mon, 19 Apr 2021 22:17:03 -0400 Received: from mailout.easymail.ca ([64.68.200.34]:49378 "EHLO mailout.easymail.ca" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233438AbhDTCRC (ORCPT ); Mon, 19 Apr 2021 22:17:02 -0400 Received: from localhost (localhost [127.0.0.1]) by mailout.easymail.ca (Postfix) with ESMTP id 0967E21018; Tue, 20 Apr 2021 02:16:31 +0000 (UTC) X-Virus-Scanned: Debian amavisd-new at emo06-pco.easydns.vpn Received: from mailout.easymail.ca ([127.0.0.1]) by localhost (emo06-pco.easydns.vpn [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id EpoJT5jIQmuC; Tue, 20 Apr 2021 02:16:30 +0000 (UTC) Received: from mail.gonehiking.org (c-24-9-64-241.hsd1.co.comcast.net [24.9.64.241]) by mailout.easymail.ca (Postfix) with ESMTPA id A521E20D9B; Tue, 20 Apr 2021 02:16:22 +0000 (UTC) Received: from [192.168.1.4] (internal [192.168.1.4]) by mail.gonehiking.org (Postfix) with ESMTP id 2B1393EF41; Mon, 19 Apr 2021 20:16:21 -0600 (MDT) To: "Maciej W. Rozycki" , Ondrej Zary Cc: "James E.J. Bottomley" , "Martin K. Petersen" , Christoph Hellwig , linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org References: <202104182221.21533.linux@zary.sk> From: Khalid Aziz Subject: Re: [PATCH 0/5] Bring the BusLogic host bus adapter driver up to Y2021 Message-ID: Date: Mon, 19 Apr 2021 20:16:20 -0600 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.7.1 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 4/19/21 10:01 AM, Maciej W. Rozycki wrote: > On Mon, 19 Apr 2021, Khalid Aziz wrote: > >> On 4/18/21 2:21 PM, Ondrej Zary wrote: >>> >>> Found the 3000763 document here: >>> https://doc.lagout.org/science/0_Computer Science/0_Computer History/old-hardware/buslogic/3000763_PCI_EISA_Wide_SCSI_Tech_Ref_Dec94.pdf >>> >>> There's also 3002593 there: >>> https://doc.lagout.org/science/0_Computer Science/0_Computer History/old-hardware/buslogic/ >>> >> >> Thanks!!! > > Ondrej: Thanks a lot indeed! These documents seem to have the essential > interface details all covered, except for Fast-20 SCSI adapters, which I > guess are a minor modification from the software's point of view. > > Khalid: I have skimmed over these documents and I infer 24-bit addressing > can be verified with any MultiMaster adapter, including ones that do have > 32-bit addressing implemented, by using the legacy Initialize Mailbox HBA > command. That could be used to stop Christoph's recent changes for older > adapter support removal and replace them with proper fixes for whatever > has become broken. Is that something you'd be willing as the driver's > maintainer to look into, or shall I? > Hi Maciej, Do you mean use OpCode 01 (INITIALIZE MAILBOX) to set a 24-bit address for mailbox in place of OpCode 81? Verifying the change would be a challenge. Do you have an old adapter to test it with? If you do, go ahead and make the changes. I will be happy to review. I have only a BT-757 adapter. Thanks, Khalid