From patchwork Thu Aug 20 15:08:31 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Robin Murphy X-Patchwork-Id: 11726485 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 E1CD1739 for ; Thu, 20 Aug 2020 15:10:00 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D108722B4B for ; Thu, 20 Aug 2020 15:10:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728788AbgHTPJw (ORCPT ); Thu, 20 Aug 2020 11:09:52 -0400 Received: from foss.arm.com ([217.140.110.172]:41146 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728757AbgHTPJk (ORCPT ); Thu, 20 Aug 2020 11:09:40 -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 81AC414BF; Thu, 20 Aug 2020 08:09:39 -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 DFEF43F6CF; Thu, 20 Aug 2020 08:09:35 -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 12/18] iommu/tegra-gart: Add IOMMU_DOMAIN_DMA support Date: Thu, 20 Aug 2020 16:08:31 +0100 Message-Id: <516b33118d489e56499ff8c64c019709b744110c.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/tegra-gart.c | 17 ++++++++++++----- 1 file changed, 12 insertions(+), 5 deletions(-) diff --git a/drivers/iommu/tegra-gart.c b/drivers/iommu/tegra-gart.c index fac720273889..e081387080f6 100644 --- a/drivers/iommu/tegra-gart.c +++ b/drivers/iommu/tegra-gart.c @@ -9,6 +9,7 @@ #define dev_fmt(fmt) "gart: " fmt +#include #include #include #include @@ -145,16 +146,22 @@ static struct iommu_domain *gart_iommu_domain_alloc(unsigned type) { struct iommu_domain *domain; - if (type != IOMMU_DOMAIN_UNMANAGED) + if (type != IOMMU_DOMAIN_UNMANAGED && type != IOMMU_DOMAIN_DMA) return NULL; domain = kzalloc(sizeof(*domain), GFP_KERNEL); - if (domain) { - domain->geometry.aperture_start = gart_handle->iovmm_base; - domain->geometry.aperture_end = gart_handle->iovmm_end - 1; - domain->geometry.force_aperture = true; + if (!domain) + return NULL; + + if (type == IOMMU_DOMAIN_DMA && iommu_get_dma_cookie(domain)) { + kfree(domain); + return NULL; } + domain->geometry.aperture_start = gart_handle->iovmm_base; + domain->geometry.aperture_end = gart_handle->iovmm_end - 1; + domain->geometry.force_aperture = true; + return domain; }