From patchwork Thu Aug 20 15:08:29 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Robin Murphy X-Patchwork-Id: 11726585 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 0656B739 for ; Thu, 20 Aug 2020 15:11:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id EC14C208C7 for ; Thu, 20 Aug 2020 15:11:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728700AbgHTPJe (ORCPT ); Thu, 20 Aug 2020 11:09:34 -0400 Received: from foss.arm.com ([217.140.110.172]:41062 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728698AbgHTPJd (ORCPT ); Thu, 20 Aug 2020 11:09:33 -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 DB83F1476; Thu, 20 Aug 2020 08:09:31 -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 539A53F6CF; Thu, 20 Aug 2020 08:09:28 -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 10/18] iommu/msm: Add IOMMU_DOMAIN_DMA support Date: Thu, 20 Aug 2020 16:08:29 +0100 Message-Id: <93d7de3533cfd952aecd6198b9221d7a58c0e521.1597931876.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, implement the corresponding driver-side support for DMA domains. Signed-off-by: Robin Murphy --- drivers/iommu/msm_iommu.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/iommu/msm_iommu.c b/drivers/iommu/msm_iommu.c index 3615cd6241c4..f34efcbb0b2b 100644 --- a/drivers/iommu/msm_iommu.c +++ b/drivers/iommu/msm_iommu.c @@ -8,6 +8,7 @@ #include #include #include +#include #include #include #include @@ -314,13 +315,16 @@ static struct iommu_domain *msm_iommu_domain_alloc(unsigned type) { struct msm_priv *priv; - if (type != IOMMU_DOMAIN_UNMANAGED) + if (type != IOMMU_DOMAIN_UNMANAGED && type != IOMMU_DOMAIN_DMA) return NULL; priv = kzalloc(sizeof(*priv), GFP_KERNEL); if (!priv) goto fail_nomem; + if (type == IOMMU_DOMAIN_DMA && iommu_get_dma_cookie(&priv->domain)) + goto fail_nomem; + INIT_LIST_HEAD(&priv->list_attached); priv->domain.geometry.aperture_start = 0; @@ -339,6 +343,7 @@ static void msm_iommu_domain_free(struct iommu_domain *domain) struct msm_priv *priv; unsigned long flags; + iommu_put_dma_cookie(domain); spin_lock_irqsave(&msm_iommu_lock, flags); priv = to_msm_priv(domain); kfree(priv);