From patchwork Thu Aug 20 15:08:27 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Robin Murphy X-Patchwork-Id: 11726591 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id AEA40739 for ; Thu, 20 Aug 2020 15:12:02 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A0436204EA for ; Thu, 20 Aug 2020 15:12:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728688AbgHTPJb (ORCPT ); Thu, 20 Aug 2020 11:09:31 -0400 Received: from foss.arm.com ([217.140.110.172]:40986 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728671AbgHTPJZ (ORCPT ); Thu, 20 Aug 2020 11:09:25 -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 4642D142F; Thu, 20 Aug 2020 08:09:24 -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 B557C3F6CF; Thu, 20 Aug 2020 08:09:20 -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 08/18] iommu/renesas: Remove arch/arm workaround Date: Thu, 20 Aug 2020 16:08:27 +0100 Message-Id: <8489dd1d9224ad60e63b9903c40832481eab622f.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, remove the shared mapping workaround and rely on groups there as well. Signed-off-by: Robin Murphy --- drivers/iommu/ipmmu-vmsa.c | 69 -------------------------------------- 1 file changed, 69 deletions(-) diff --git a/drivers/iommu/ipmmu-vmsa.c b/drivers/iommu/ipmmu-vmsa.c index 0f18abda0e20..8ad74a76f402 100644 --- a/drivers/iommu/ipmmu-vmsa.c +++ b/drivers/iommu/ipmmu-vmsa.c @@ -26,15 +26,6 @@ #include #include -#if defined(CONFIG_ARM) && !defined(CONFIG_IOMMU_DMA) -#include -#else -#define arm_iommu_create_mapping(...) NULL -#define arm_iommu_attach_device(...) -ENODEV -#define arm_iommu_release_mapping(...) do {} while (0) -#define arm_iommu_detach_device(...) do {} while (0) -#endif - #define IPMMU_CTX_MAX 8U #define IPMMU_CTX_INVALID -1 @@ -67,7 +58,6 @@ struct ipmmu_vmsa_device { s8 utlb_ctx[IPMMU_UTLB_MAX]; struct iommu_group *group; - struct dma_iommu_mapping *mapping; }; struct ipmmu_vmsa_domain { @@ -805,50 +795,6 @@ static int ipmmu_of_xlate(struct device *dev, return ipmmu_init_platform_device(dev, spec); } -static int ipmmu_init_arm_mapping(struct device *dev) -{ - struct ipmmu_vmsa_device *mmu = to_ipmmu(dev); - int ret; - - /* - * Create the ARM mapping, used by the ARM DMA mapping core to allocate - * VAs. This will allocate a corresponding IOMMU domain. - * - * TODO: - * - Create one mapping per context (TLB). - * - Make the mapping size configurable ? We currently use a 2GB mapping - * at a 1GB offset to ensure that NULL VAs will fault. - */ - if (!mmu->mapping) { - struct dma_iommu_mapping *mapping; - - mapping = arm_iommu_create_mapping(&platform_bus_type, - SZ_1G, SZ_2G); - if (IS_ERR(mapping)) { - dev_err(mmu->dev, "failed to create ARM IOMMU mapping\n"); - ret = PTR_ERR(mapping); - goto error; - } - - mmu->mapping = mapping; - } - - /* Attach the ARM VA mapping to the device. */ - ret = arm_iommu_attach_device(dev, mmu->mapping); - if (ret < 0) { - dev_err(dev, "Failed to attach device to VA mapping\n"); - goto error; - } - - return 0; - -error: - if (mmu->mapping) - arm_iommu_release_mapping(mmu->mapping); - - return ret; -} - static struct iommu_device *ipmmu_probe_device(struct device *dev) { struct ipmmu_vmsa_device *mmu = to_ipmmu(dev); @@ -862,20 +808,8 @@ static struct iommu_device *ipmmu_probe_device(struct device *dev) return &mmu->iommu; } -static void ipmmu_probe_finalize(struct device *dev) -{ - int ret = 0; - - if (IS_ENABLED(CONFIG_ARM) && !IS_ENABLED(CONFIG_IOMMU_DMA)) - ret = ipmmu_init_arm_mapping(dev); - - if (ret) - dev_err(dev, "Can't create IOMMU mapping - DMA-OPS will not work\n"); -} - static void ipmmu_release_device(struct device *dev) { - arm_iommu_detach_device(dev); } static struct iommu_group *ipmmu_find_group(struct device *dev) @@ -905,7 +839,6 @@ static const struct iommu_ops ipmmu_ops = { .iova_to_phys = ipmmu_iova_to_phys, .probe_device = ipmmu_probe_device, .release_device = ipmmu_release_device, - .probe_finalize = ipmmu_probe_finalize, .device_group = IS_ENABLED(CONFIG_ARM) && !IS_ENABLED(CONFIG_IOMMU_DMA) ? generic_device_group : ipmmu_find_group, .pgsize_bitmap = SZ_1G | SZ_2M | SZ_4K, @@ -1118,8 +1051,6 @@ static int ipmmu_remove(struct platform_device *pdev) iommu_device_sysfs_remove(&mmu->iommu); iommu_device_unregister(&mmu->iommu); - arm_iommu_release_mapping(mmu->mapping); - ipmmu_device_reset(mmu); return 0;