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=-2.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS 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 2B14AC4338F for ; Mon, 26 Jul 2021 21:58:51 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 069C860F37 for ; Mon, 26 Jul 2021 21:58:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231959AbhGZVSW (ORCPT ); Mon, 26 Jul 2021 17:18:22 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48980 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229687AbhGZVSV (ORCPT ); Mon, 26 Jul 2021 17:18:21 -0400 Received: from mail-ed1-x52c.google.com (mail-ed1-x52c.google.com [IPv6:2a00:1450:4864:20::52c]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 91073C061757; Mon, 26 Jul 2021 14:58:49 -0700 (PDT) Received: by mail-ed1-x52c.google.com with SMTP id da26so12613754edb.1; Mon, 26 Jul 2021 14:58:49 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=message-id:subject:from:to:cc:date:in-reply-to:references :user-agent:mime-version:content-transfer-encoding; bh=R5WzJafvHvQD5KbS6EJ/H8Ed9c7/eKNCV1X3I361Rt4=; b=ZEwS73pxLDfBefXs5tRE1bgXySW7xSJJYOWG71DrYkCED46tnTEgMoQmlbQBhEwkDC zTQPtuUngDjUWfM1qDfpMrIDdRagepy/CdJRHBDnxqxWgx1IQ/+D0RUPZ+GjdOD7cYDq WmHb3mhaQ49iHSjaGftPxNDYNA79cy0O1GGI6D/mr8e+lma+7WhyytNkSGDdg4XrnKpd NJYElDXk9Xz5R5J3I6SYGLbQi/PEVgOGfXP87PBKfCBOMkeQfnBmiWX0DqmRrTlZtJlf uI+ajhBp20WXRxOaNYwMJlCttXeUVgBqWh9/9LvDRN+SIx+Y/o+BcVxTk5TGZK96Qf/f +Zdw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:message-id:subject:from:to:cc:date:in-reply-to :references:user-agent:mime-version:content-transfer-encoding; bh=R5WzJafvHvQD5KbS6EJ/H8Ed9c7/eKNCV1X3I361Rt4=; b=cJfh9qd2B0abj+R5akYUearw04rkGsXo0NYU+T+k6S4yFdCNmKtQ55kDIn8ASZX54z pSBWA1yN3Ro61iOxczGcBhW9X6REv6kHVNDPfy4LRFQopCWKBaUi5d+QRVSx6dBoLyYK /hNCKx0njof9DxGGzgl9E+sWdMXo2QDo1S0sbqEKDOJF66Rb6WcsnU3SrKllEPDTRxr7 HtxKbYwbPtRriL+KLkq0xc6VA46lZQwAL1K3HJ4YWiOsw7rNjiWKU+UIynYB7a6mDS6v b6RiP456x6dYq6kRM5zvtvG5iHSD3FPcq0JY1/oNOZEWxgKy0WNFI9KROnlyCpdC0O1a 0MWw== X-Gm-Message-State: AOAM533nmzm3jWQyIqUrs/LuisInhT5Q/DdZbpgc3D1kuz7vEJi5kC+o gx/56R2UE9kR2pn3B9u+RWg= X-Google-Smtp-Source: ABdhPJyDqo2D3LrCuH0aH1JxllWWvEzD2aTtCKIeOjfyqJ5ce3MHaHG1f8Xly2yHneMFTmQ3A6AYdA== X-Received: by 2002:a05:6402:2074:: with SMTP id bd20mr18403209edb.123.1627336728208; Mon, 26 Jul 2021 14:58:48 -0700 (PDT) Received: from ubuntu-laptop (ip5f5bec25.dynamic.kabel-deutschland.de. [95.91.236.37]) by smtp.googlemail.com with ESMTPSA id fw23sm266034ejb.66.2021.07.26.14.58.44 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 26 Jul 2021 14:58:47 -0700 (PDT) Message-ID: <602ee8bc56891f0f0429afe274d7174ec325172e.camel@gmail.com> Subject: Re: [PATCH v2 14/15] scsi: ufs: ufs-exynos: multi-host configuration for exynosauto From: Bean Huo To: Chanho Park , 'Krzysztof Kozlowski' , 'Alim Akhtar' , "'James E . J . Bottomley'" , "'Martin K . Petersen'" Cc: 'Can Guo' , 'Jaegeuk Kim' , 'Kiwoong Kim' , 'Avri Altman' , 'Adrian Hunter' , 'Christoph Hellwig' , 'Bart Van Assche' , 'jongmin jeong' , 'Gyunghoon Kwon' , linux-samsung-soc@vger.kernel.org, linux-scsi@vger.kernel.org Date: Mon, 26 Jul 2021 23:58:44 +0200 In-Reply-To: <000601d7820a$9aa11210$cfe33630$@samsung.com> References: <20210714071131.101204-1-chanho61.park@samsung.com> <20210714071131.101204-15-chanho61.park@samsung.com> <2b4f4e6d76cdc517843fe8880312541c754d5352.camel@gmail.com> <000601d7820a$9aa11210$cfe33630$@samsung.com> Content-Type: text/plain; charset="UTF-8" User-Agent: Evolution 3.36.5-0ubuntu1 MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-samsung-soc@vger.kernel.org On Mon, 2021-07-26 at 19:40 +0900, Chanho Park wrote: > > I don't understand here. how many doorbell registers you have now? > > and doesn VHs have a doorbell register also? and each doorbell > > register > > still supprts 32 tags? > > > A PH has its own doorbell register and each VHs also has it as well. > > The TASK_TAG[7:5] can be used to distinguish the origin of the > request among VHs and remaining TASK_TAG[4:0] will be used for > supporting 32 tags. > > > > Best Regards, > > Chanho Park Thanks for your reply. so you split the "Task Tag" filed byte3 in the UPIU header to two parts, bit7~bit5 is for the VHs ID, and bit4~bit0 is for the task ID. but this is not defined in the Spec 2.1. correct? Kind regards, Bean