From patchwork Thu Aug 20 15:08:36 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Robin Murphy X-Patchwork-Id: 257375 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=-12.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable 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 7C153C433E3 for ; Thu, 20 Aug 2020 15:11:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 62A4520FC3 for ; Thu, 20 Aug 2020 15:11:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728372AbgHTPLF (ORCPT ); Thu, 20 Aug 2020 11:11:05 -0400 Received: from foss.arm.com ([217.140.110.172]:41342 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728824AbgHTPJ7 (ORCPT ); Thu, 20 Aug 2020 11:09:59 -0400 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 84CA2152B; Thu, 20 Aug 2020 08:09:58 -0700 (PDT) Received: from e121345-lin.cambridge.arm.com (e121345-lin.cambridge.arm.com [10.1.196.37]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id EA9CB3F6CF; Thu, 20 Aug 2020 08:09:54 -0700 (PDT) From: Robin Murphy To: hch@lst.de, joro@8bytes.org, linux@armlinux.org.uk Cc: will@kernel.org, inki.dae@samsung.com, sw0312.kim@samsung.com, kyungmin.park@samsung.com, m.szyprowski@samsung.com, agross@kernel.org, bjorn.andersson@linaro.org, thierry.reding@gmail.com, jonathanh@nvidia.com, vdumpa@nvidia.com, digetx@gmail.com, matthias.bgg@gmail.com, yong.wu@mediatek.com, geert+renesas@glider.be, magnus.damm@gmail.com, t-kristo@ti.com, s-anna@ti.com, laurent.pinchart@ideasonboard.com, linux-arm-kernel@lists.infradead.org, iommu@lists.linux-foundation.org, linux-samsung-soc@vger.kernel.org, linux-tegra@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-mediatek@lists.infradead.org, dri-devel@lists.freedesktop.org, linux-media@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 17/18] media/omap3isp: Clean up IOMMU workaround Date: Thu, 20 Aug 2020 16:08:36 +0100 Message-Id: <11d8419744e4e744a9448180801b0c4683328afd.1597931876.git.robin.murphy@arm.com> X-Mailer: git-send-email 2.28.0.dirty In-Reply-To: References: MIME-Version: 1.0 Sender: linux-samsung-soc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-samsung-soc@vger.kernel.org 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 --- drivers/media/platform/omap3isp/isp.c | 68 ++------------------------- drivers/media/platform/omap3isp/isp.h | 3 -- 2 files changed, 3 insertions(+), 68 deletions(-) diff --git a/drivers/media/platform/omap3isp/isp.c b/drivers/media/platform/omap3isp/isp.c index b91e472ee764..196522883231 100644 --- a/drivers/media/platform/omap3isp/isp.c +++ b/drivers/media/platform/omap3isp/isp.c @@ -56,10 +56,6 @@ #include #include -#ifdef CONFIG_ARM_DMA_USE_IOMMU -#include -#endif - #include #include #include @@ -1942,51 +1938,6 @@ static int isp_initialize_modules(struct isp_device *isp) return ret; } -static void isp_detach_iommu(struct isp_device *isp) -{ -#ifdef CONFIG_ARM_DMA_USE_IOMMU - arm_iommu_detach_device(isp->dev); - arm_iommu_release_mapping(isp->mapping); - isp->mapping = NULL; -#endif -} - -static int isp_attach_iommu(struct isp_device *isp) -{ -#ifdef CONFIG_ARM_DMA_USE_IOMMU - struct dma_iommu_mapping *mapping; - int ret; - - /* - * Create the ARM mapping, used by the ARM DMA mapping core to allocate - * VAs. This will allocate a corresponding IOMMU domain. - */ - mapping = arm_iommu_create_mapping(&platform_bus_type, SZ_1G, SZ_2G); - if (IS_ERR(mapping)) { - dev_err(isp->dev, "failed to create ARM IOMMU mapping\n"); - return PTR_ERR(mapping); - } - - isp->mapping = mapping; - - /* Attach the ARM VA mapping to the device. */ - ret = arm_iommu_attach_device(isp->dev, mapping); - if (ret < 0) { - dev_err(isp->dev, "failed to attach device to VA mapping\n"); - goto error; - } - - return 0; - -error: - arm_iommu_release_mapping(isp->mapping); - isp->mapping = NULL; - return ret; -#else - return -ENODEV; -#endif -} - /* * isp_remove - Remove ISP platform device * @pdev: Pointer to ISP platform device @@ -2002,10 +1953,6 @@ static int isp_remove(struct platform_device *pdev) isp_cleanup_modules(isp); isp_xclk_cleanup(isp); - __omap3isp_get(isp, false); - isp_detach_iommu(isp); - __omap3isp_put(isp, false); - media_entity_enum_cleanup(&isp->crashed); v4l2_async_notifier_cleanup(&isp->notifier); @@ -2383,18 +2330,11 @@ static int isp_probe(struct platform_device *pdev) isp->mmio_hist_base_phys = mem->start + isp_res_maps[m].offset[OMAP3_ISP_IOMEM_HIST]; - /* IOMMU */ - ret = isp_attach_iommu(isp); - if (ret < 0) { - dev_err(&pdev->dev, "unable to attach to IOMMU\n"); - goto error_isp; - } - /* Interrupt */ ret = platform_get_irq(pdev, 0); if (ret <= 0) { ret = -ENODEV; - goto error_iommu; + goto error_isp; } isp->irq_num = ret; @@ -2402,13 +2342,13 @@ static int isp_probe(struct platform_device *pdev) "OMAP3 ISP", isp)) { dev_err(isp->dev, "Unable to request IRQ\n"); ret = -EINVAL; - goto error_iommu; + goto error_isp; } /* Entities */ ret = isp_initialize_modules(isp); if (ret < 0) - goto error_iommu; + goto error_isp; ret = isp_register_entities(isp); if (ret < 0) @@ -2433,8 +2373,6 @@ static int isp_probe(struct platform_device *pdev) isp_unregister_entities(isp); error_modules: isp_cleanup_modules(isp); -error_iommu: - isp_detach_iommu(isp); error_isp: isp_xclk_cleanup(isp); __omap3isp_put(isp, false); diff --git a/drivers/media/platform/omap3isp/isp.h b/drivers/media/platform/omap3isp/isp.h index a9d760fbf349..b50459106d89 100644 --- a/drivers/media/platform/omap3isp/isp.h +++ b/drivers/media/platform/omap3isp/isp.h @@ -145,7 +145,6 @@ struct isp_xclk { * @syscon: Regmap for the syscon register space * @syscon_offset: Offset of the CSIPHY control register in syscon * @phy_type: ISP_PHY_TYPE_{3430,3630} - * @mapping: IOMMU mapping * @stat_lock: Spinlock for handling statistics * @isp_mutex: Mutex for serializing requests to ISP. * @stop_failure: Indicates that an entity failed to stop. @@ -185,8 +184,6 @@ struct isp_device { u32 syscon_offset; u32 phy_type; - struct dma_iommu_mapping *mapping; - /* ISP Obj */ spinlock_t stat_lock; /* common lock for statistic drivers */ struct mutex isp_mutex; /* For handling ref_count field */