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=-5.2 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,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 79166C2D0A3 for ; Wed, 4 Nov 2020 10:29:32 +0000 (UTC) Received: from fraxinus.osuosl.org (smtp4.osuosl.org [140.211.166.137]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 82A0721734 for ; Wed, 4 Nov 2020 10:29:31 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 82A0721734 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=lst.de Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=iommu-bounces@lists.linux-foundation.org Received: from localhost (localhost [127.0.0.1]) by fraxinus.osuosl.org (Postfix) with ESMTP id EB51A856CB; Wed, 4 Nov 2020 10:29:30 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from fraxinus.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id s0Yte8f5UA5D; Wed, 4 Nov 2020 10:29:29 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [140.211.9.56]) by fraxinus.osuosl.org (Postfix) with ESMTP id ECFB084F33; Wed, 4 Nov 2020 10:29:29 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id D3290C088B; Wed, 4 Nov 2020 10:29:29 +0000 (UTC) Received: from hemlock.osuosl.org (smtp2.osuosl.org [140.211.166.133]) by lists.linuxfoundation.org (Postfix) with ESMTP id 953FBC0051 for ; Wed, 4 Nov 2020 10:29:28 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by hemlock.osuosl.org (Postfix) with ESMTP id 8351C87487 for ; Wed, 4 Nov 2020 10:29:28 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from hemlock.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id VrGFPbbHF400 for ; Wed, 4 Nov 2020 10:29:27 +0000 (UTC) X-Greylist: from auto-whitelisted by SQLgrey-1.7.6 Received: from verein.lst.de (verein.lst.de [213.95.11.211]) by hemlock.osuosl.org (Postfix) with ESMTPS id 68D0087483 for ; Wed, 4 Nov 2020 10:29:27 +0000 (UTC) Received: by verein.lst.de (Postfix, from userid 2407) id 69E9E68D04; Wed, 4 Nov 2020 11:29:23 +0100 (CET) Date: Wed, 4 Nov 2020 11:29:23 +0100 From: Christoph Hellwig To: Robin Murphy Subject: Re: use of dma_direct_set_offset in (allwinner) drivers Message-ID: <20201104102923.GA23981@lst.de> References: <20201103095538.GA19136@lst.de> <20201104081411.bnt5kixgunaczbzj@gilmour.lan> <9623c346-c86c-e3ce-332b-95492576a859@arm.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <9623c346-c86c-e3ce-332b-95492576a859@arm.com> User-Agent: Mutt/1.5.17 (2007-11-01) Cc: devel@driverdev.osuosl.org, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, Paul Kocialkowski , Chen-Yu Tsai , iommu@lists.linux-foundation.org, Maxime Ripard , Yong Deng , Christoph Hellwig , linux-arm-kernel@lists.infradead.org, linux-media@vger.kernel.org X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" On Wed, Nov 04, 2020 at 10:15:49AM +0000, Robin Murphy wrote: > How about having something in the platform code that keys off the top-level > SoC compatible and uses a bus notifier to create offsets for the relevant > devices if an MBUS description is missing? At least that way the workaround > could be confined to a single dedicated place and look somewhat similar to > other special cases like sta2x11, rather than being duplicated all over the > place. Yes, that would be the right way to handle the issue. _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu