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=-12.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,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 07962C433DF for ; Thu, 20 Aug 2020 15:13:57 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (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 9B9BC204EA for ; Thu, 20 Aug 2020 15:13:56 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="YXBemKcV" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 9B9BC204EA Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=merlin.20170209; h=Sender:Content-Transfer-Encoding: Content-Type:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To:Message-Id:Date: Subject:To:From:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=5yPbHs6AzBr33V81CYXDzLxyjKyxESKf7ExfJdcSI5k=; b=YXBemKcVIR7fq4PiTAfcj9WCx uLrG+7066JInHVM6p0zOTl06o+gfyWMCFr6ZXHj78vjEPTcceicVCdEHHNAzDCgJaK9CqCyBQYOi5 1SNOjhRDh4vAJ4BGyJs2LHxYBJh5s0/Jzx24edmu9SXSJOewd+Q4q/JDsOIO8AxkRiIA1KNiTH7Hp 63uP+pqPGYt4iY7PRWCalmHV5f8j4BSf+R2pIHbyDfD/1w5JXRR4HWA/XzQz/md75Q7t51POAZFFT GViEa4TpIqZQW9/oLhw8Tmnjqu6MYaDhVOs1PabAwWve8QPgIWCC/evDy1Lawi2X9jtS1V9QvVuaa CA1IXSkLA==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1k8mEV-0003zq-6o; Thu, 20 Aug 2020 15:12:03 +0000 Received: from foss.arm.com ([217.140.110.172]) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1k8mCG-0002LH-1G; Thu, 20 Aug 2020 15:09:56 +0000 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 4B97B1509; Thu, 20 Aug 2020 08:09:43 -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 AAB5A3F6CF; Thu, 20 Aug 2020 08:09:39 -0700 (PDT) From: Robin Murphy To: hch@lst.de, joro@8bytes.org, linux@armlinux.org.uk Subject: [PATCH 13/18] iommu/tegra: Add IOMMU_DOMAIN_DMA support Date: Thu, 20 Aug 2020 16:08:32 +0100 Message-Id: X-Mailer: git-send-email 2.28.0.dirty In-Reply-To: References: MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200820_110945_142369_0314E992 X-CRM114-Status: GOOD ( 16.54 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: geert+renesas@glider.be, dri-devel@lists.freedesktop.org, bjorn.andersson@linaro.org, matthias.bgg@gmail.com, thierry.reding@gmail.com, laurent.pinchart@ideasonboard.com, digetx@gmail.com, will@kernel.org, m.szyprowski@samsung.com, linux-samsung-soc@vger.kernel.org, magnus.damm@gmail.com, kyungmin.park@samsung.com, jonathanh@nvidia.com, agross@kernel.org, yong.wu@mediatek.com, linux-media@vger.kernel.org, linux-arm-msm@vger.kernel.org, inki.dae@samsung.com, linux-mediatek@lists.infradead.org, linux-tegra@vger.kernel.org, linux-arm-kernel@lists.infradead.org, sw0312.kim@samsung.com, linux-kernel@vger.kernel.org, t-kristo@ti.com, iommu@lists.linux-foundation.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Now that arch/arm is wired up for default domains and iommu-dma, implement the corresponding driver-side support for DMA domains. Signed-off-by: Robin Murphy --- drivers/iommu/tegra-smmu.c | 37 +++++++++++++++++++++---------------- 1 file changed, 21 insertions(+), 16 deletions(-) diff --git a/drivers/iommu/tegra-smmu.c b/drivers/iommu/tegra-smmu.c index 124c8848ab7e..8e276eac84d9 100644 --- a/drivers/iommu/tegra-smmu.c +++ b/drivers/iommu/tegra-smmu.c @@ -5,6 +5,7 @@ #include #include +#include #include #include #include @@ -278,7 +279,7 @@ static struct iommu_domain *tegra_smmu_domain_alloc(unsigned type) { struct tegra_smmu_as *as; - if (type != IOMMU_DOMAIN_UNMANAGED) + if (type != IOMMU_DOMAIN_UNMANAGED && type != IOMMU_DOMAIN_DMA) return NULL; as = kzalloc(sizeof(*as), GFP_KERNEL); @@ -288,25 +289,19 @@ static struct iommu_domain *tegra_smmu_domain_alloc(unsigned type) as->attr = SMMU_PD_READABLE | SMMU_PD_WRITABLE | SMMU_PD_NONSECURE; as->pd = alloc_page(GFP_KERNEL | __GFP_DMA | __GFP_ZERO); - if (!as->pd) { - kfree(as); - return NULL; - } + if (!as->pd) + goto out_free_as; as->count = kcalloc(SMMU_NUM_PDE, sizeof(u32), GFP_KERNEL); - if (!as->count) { - __free_page(as->pd); - kfree(as); - return NULL; - } + if (!as->count) + goto out_free_all; as->pts = kcalloc(SMMU_NUM_PDE, sizeof(*as->pts), GFP_KERNEL); - if (!as->pts) { - kfree(as->count); - __free_page(as->pd); - kfree(as); - return NULL; - } + if (!as->pts) + goto out_free_all; + + if (type == IOMMU_DOMAIN_DMA && iommu_get_dma_cookie(&as->domain)) + goto out_free_all; /* setup aperture */ as->domain.geometry.aperture_start = 0; @@ -314,12 +309,22 @@ static struct iommu_domain *tegra_smmu_domain_alloc(unsigned type) as->domain.geometry.force_aperture = true; return &as->domain; + +out_free_all: + kfree(as->pts); + kfree(as->count); + __free_page(as->pd); +out_free_as: + kfree(as); + return NULL; } static void tegra_smmu_domain_free(struct iommu_domain *domain) { struct tegra_smmu_as *as = to_smmu_as(domain); + iommu_put_dma_cookie(domain); + /* TODO: free page directory and page tables */ WARN_ON_ONCE(as->use_count); -- 2.28.0.dirty _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel