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=-8.2 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=ham 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 62351C433E4 for ; Thu, 20 Aug 2020 19:56:57 +0000 (UTC) Received: from silver.osuosl.org (smtp3.osuosl.org [140.211.166.136]) (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 3C6DA2076E for ; Thu, 20 Aug 2020 19:56:57 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 3C6DA2076E Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=iki.fi Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=iommu-bounces@lists.linux-foundation.org Received: from localhost (localhost [127.0.0.1]) by silver.osuosl.org (Postfix) with ESMTP id 041DF203E4; Thu, 20 Aug 2020 19:56:57 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from silver.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 6hT1SlOCmCY0; Thu, 20 Aug 2020 19:56:55 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [140.211.9.56]) by silver.osuosl.org (Postfix) with ESMTP id 372F51FD90; Thu, 20 Aug 2020 19:56:55 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id 1933EC07FF; Thu, 20 Aug 2020 19:56:55 +0000 (UTC) Received: from fraxinus.osuosl.org (smtp4.osuosl.org [140.211.166.137]) by lists.linuxfoundation.org (Postfix) with ESMTP id B282BC0051 for ; Thu, 20 Aug 2020 19:56:52 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by fraxinus.osuosl.org (Postfix) with ESMTP id 9BD4B86AB0 for ; Thu, 20 Aug 2020 19:56:52 +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 oBUfpZ2X3EOo for ; Thu, 20 Aug 2020 19:56:50 +0000 (UTC) X-Greylist: from auto-whitelisted by SQLgrey-1.7.6 Received: from hillosipuli.retiisi.org.uk (retiisi.org.uk [95.216.213.190]) by fraxinus.osuosl.org (Postfix) with ESMTPS id 40F2086AAB for ; Thu, 20 Aug 2020 19:56:50 +0000 (UTC) Received: from valkosipuli.localdomain (valkosipuli.retiisi.org.uk [IPv6:2a01:4f9:c010:4572::80:2]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange ECDHE (P-256) server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by hillosipuli.retiisi.org.uk (Postfix) with ESMTPS id 914F6634C87; Thu, 20 Aug 2020 22:55:36 +0300 (EEST) Received: from sailus by valkosipuli.localdomain with local (Exim 4.92) (envelope-from ) id 1k8qeu-0002rH-B7; Thu, 20 Aug 2020 22:55:36 +0300 Date: Thu, 20 Aug 2020 22:55:36 +0300 From: Sakari Ailus To: Robin Murphy Subject: Re: [PATCH 17/18] media/omap3isp: Clean up IOMMU workaround Message-ID: <20200820195536.GL7145@valkosipuli.retiisi.org.uk> References: <11d8419744e4e744a9448180801b0c4683328afd.1597931876.git.robin.murphy@arm.com> <20200820165339.GK7145@valkosipuli.retiisi.org.uk> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.10.1 (2018-07-13) Cc: geert+renesas@glider.be, dri-devel@lists.freedesktop.org, linux-tegra@vger.kernel.org, thierry.reding@gmail.com, laurent.pinchart@ideasonboard.com, digetx@gmail.com, will@kernel.org, hch@lst.de, linux-samsung-soc@vger.kernel.org, magnus.damm@gmail.com, linux@armlinux.org.uk, jonathanh@nvidia.com, agross@kernel.org, linux-media@vger.kernel.org, linux-arm-msm@vger.kernel.org, inki.dae@samsung.com, linux-mediatek@lists.infradead.org, matthias.bgg@gmail.com, linux-arm-kernel@lists.infradead.org, sw0312.kim@samsung.com, iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org, t-kristo@ti.com, kyungmin.park@samsung.com 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 Thu, Aug 20, 2020 at 06:25:19PM +0100, Robin Murphy wrote: > On 2020-08-20 17:53, Sakari Ailus wrote: > > Hi Robin, > > > > On Thu, Aug 20, 2020 at 04:08:36PM +0100, Robin Murphy wrote: > > > Now that arch/arm is wired up for default domains and iommu-dma, devices > > > behind IOMMUs will get mappings set up automatically as appropriate, so > > > there is no need for drivers to do so manually. > > > > > > Signed-off-by: Robin Murphy > > > > Thanks for the patch. > > Many thanks for testing so quickly! > > > I haven't looked at the details but it seems that this causes the buffer > > memory allocation to be physically contiguous, which causes a failure to > > allocate video buffers of entirely normal size. I guess that was not > > intentional? > > Hmm, it looks like the device ends up with the wrong DMA ops, which implies > something didn't go as expected with the earlier IOMMU setup and default > domain creation. Chances are that either I missed some subtlety in the > omap_iommu change, or I've fundamentally misjudged how the ISP probing works > and it never actually goes down the of_iommu_configure() path in the first > place. Do you get any messages from the IOMMU layer earlier on during boot? I do get these: [ 2.934936] iommu: Default domain type: Translated [ 2.940917] omap-iommu 480bd400.mmu: 480bd400.mmu registered [ 2.946899] platform 480bc000.isp: Adding to iommu group 0 -- Sakari Ailus _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu