From patchwork Thu Aug 20 15:08:30 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Robin Murphy X-Patchwork-Id: 11726605 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 CB3FF739 for ; Thu, 20 Aug 2020 15:12:15 +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 9DB04208DB for ; Thu, 20 Aug 2020 15:12:15 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="gzv2zL/N" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 9DB04208DB 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-mediatek-bounces+patchwork-linux-mediatek=patchwork.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=AzfbEmxdzUQwFX4VeNflYrJ/eGFo9sTYHfIR78Gtxas=; b=gzv2zL/N4FAOPU+LbJu2J3ipl iew4VusG+D8LzbAtUFfVR0lmQs0a450IC1P5ePjQHL4ippI0hTRwu7tMjDSoi6ssoi2URXksqodOD 88CbzrmiZ1z7o51mq5tMNZEsMxJrM3IXUWtPP/I1wo0M6kG5mDHKUAjrRk0hCkKf8jQe6duvvB2Y4 Fadal9dMgH/YvR82m8FiCDj6uSwXageljsWYoyhA+zrCBuIURhwgeAr/qs2ueml0gVYsh/v7I8WCk aIy6qeBd1AeNAy0JyzGKDJwgn1C4aVtb6QKkeHKBL2ScZIFWb32WUisHBY05VKgNjjzfgijuc8iSF fPYLuZt3A==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1k8mEf-00047Q-2D; Thu, 20 Aug 2020 15:12:13 +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 1k8mC8-0002Fr-55; Thu, 20 Aug 2020 15:09:46 +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 A704E1477; Thu, 20 Aug 2020 08:09:35 -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 226C33F6CF; Thu, 20 Aug 2020 08:09:32 -0700 (PDT) From: Robin Murphy To: hch@lst.de, joro@8bytes.org, linux@armlinux.org.uk Subject: [PATCH 11/18] iommu/omap: Add IOMMU_DOMAIN_DMA support Date: Thu, 20 Aug 2020 16:08:30 +0100 Message-Id: <5ac3788f9f61f7698cfa9c5924d62714e230f678.1597931876.git.robin.murphy@arm.com> 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_110936_374259_831B9B1B X-CRM114-Status: GOOD ( 17.17 ) X-Spam-Score: -2.3 (--) X-Spam-Report: SpamAssassin version 3.4.4 on merlin.infradead.org summary: Content analysis details: (-2.3 points) pts rule name description ---- ---------------------- -------------------------------------------------- -2.3 RCVD_IN_DNSWL_MED RBL: Sender listed at https://www.dnswl.org/, medium trust [217.140.110.172 listed in list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record X-BeenThere: linux-mediatek@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, s-anna@ti.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, vdumpa@nvidia.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 Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+patchwork-linux-mediatek=patchwork.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/omap-iommu.c | 22 +++++++++++++++++++++- 1 file changed, 21 insertions(+), 1 deletion(-) diff --git a/drivers/iommu/omap-iommu.c b/drivers/iommu/omap-iommu.c index 71f29c0927fc..ea25c2fe0418 100644 --- a/drivers/iommu/omap-iommu.c +++ b/drivers/iommu/omap-iommu.c @@ -9,6 +9,7 @@ * Paul Mundt and Toshihiro Kobayashi */ +#include #include #include #include @@ -1574,13 +1575,19 @@ static struct iommu_domain *omap_iommu_domain_alloc(unsigned type) { struct omap_iommu_domain *omap_domain; - if (type != IOMMU_DOMAIN_UNMANAGED) + if (type != IOMMU_DOMAIN_UNMANAGED && type != IOMMU_DOMAIN_DMA) return NULL; omap_domain = kzalloc(sizeof(*omap_domain), GFP_KERNEL); if (!omap_domain) return NULL; + if (type == IOMMU_DOMAIN_DMA && + iommu_get_dma_cookie(&omap_domain->domain)) { + kfree(omap_domain); + return NULL; + } + spin_lock_init(&omap_domain->lock); omap_domain->domain.geometry.aperture_start = 0; @@ -1601,6 +1608,7 @@ static void omap_iommu_domain_free(struct iommu_domain *domain) if (omap_domain->dev) _omap_iommu_detach_dev(omap_domain, omap_domain->dev); + iommu_put_dma_cookie(&omap_domain->domain); kfree(omap_domain); } @@ -1736,6 +1744,17 @@ static struct iommu_group *omap_iommu_device_group(struct device *dev) return group; } +static int omap_iommu_of_xlate(struct device *dev, + struct of_phandle_args *args) +{ + /* + * Logically, some of the housekeeping from _omap_iommu_add_device() + * should probably move here, but the minimum we *need* is simply to + * cooperate with of_iommu at all to let iommu-dma work. + */ + return 0; +} + static const struct iommu_ops omap_iommu_ops = { .domain_alloc = omap_iommu_domain_alloc, .domain_free = omap_iommu_domain_free, @@ -1747,6 +1766,7 @@ static const struct iommu_ops omap_iommu_ops = { .probe_device = omap_iommu_probe_device, .release_device = omap_iommu_release_device, .device_group = omap_iommu_device_group, + .of_xlate = omap_iommu_of_xlate, .pgsize_bitmap = OMAP_IOMMU_PGSIZES, };