From: Jason Gunthorpe <jgg@nvidia.com>
To: Andy Gross <agross@kernel.org>,
Alim Akhtar <alim.akhtar@samsung.com>,
Bjorn Andersson <andersson@kernel.org>,
AngeloGioacchino Del Regno
<angelogioacchino.delregno@collabora.com>,
Baolin Wang <baolin.wang@linux.alibaba.com>,
Christophe Leroy <christophe.leroy@csgroup.eu>,
Gerald Schaefer <gerald.schaefer@linux.ibm.com>,
Heiko Stuebner <heiko@sntech.de>,
iommu@lists.linux.dev, Jernej Skrabec <jernej.skrabec@gmail.com>,
Jonathan Hunter <jonathanh@nvidia.com>,
Joerg Roedel <joro@8bytes.org>, Kevin Tian <kevin.tian@intel.com>,
Konrad Dybcio <konrad.dybcio@linaro.org>,
Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>,
linux-arm-kernel@lists.infradead.org,
linux-arm-msm@vger.kernel.org,
linux-mediatek@lists.infradead.org,
linux-rockchip@lists.infradead.org, linux-s390@vger.kernel.org,
linux-samsung-soc@vger.kernel.org, linux-sunxi@lists.linux.dev,
linux-tegra@vger.kernel.org, Russell King <linux@armlinux.org.uk>,
linuxppc-dev@lists.ozlabs.org,
Marek Szyprowski <m.szyprowski@samsung.com>,
Matthias Brugger <matthias.bgg@gmail.com>,
Matthew Rosato <mjrosato@linux.ibm.com>,
Michael Ellerman <mpe@ellerman.id.au>,
Nicholas Piggin <npiggin@gmail.com>,
Orson Zhai <orsonzhai@gmail.com>, Rob Clark <robdclark@gmail.com>,
Robin Murphy <robin.murphy@arm.com>,
Samuel Holland <samuel@sholland.org>,
Thierry Reding <thierry.reding@gmail.com>,
Krishna Reddy <vdumpa@nvidia.com>, Chen-Yu Tsai <wens@csie.org>,
Will Deacon <will@kernel.org>, Yong Wu <yong.wu@mediatek.com>,
Chunyan Zhang <zhang.lyra@gmail.com>
Cc: Lu Baolu <baolu.lu@linux.intel.com>,
Dmitry Osipenko <digetx@gmail.com>,
Nicolin Chen <nicolinc@nvidia.com>,
Niklas Schnelle <schnelle@linux.ibm.com>,
Steven Price <steven.price@arm.com>,
Thierry Reding <treding@nvidia.com>
Subject: [PATCH v2 06/25] iommu/mtk_iommu_v1: Implement an IDENTITY domain
Date: Mon, 15 May 2023 21:00:39 -0300 [thread overview]
Message-ID: <6-v2-8d1dc464eac9+10f-iommu_all_defdom_jgg@nvidia.com> (raw)
In-Reply-To: <0-v2-8d1dc464eac9+10f-iommu_all_defdom_jgg@nvidia.com>
What mtk does during mtk_iommu_v1_set_platform_dma() is actually putting
the iommu into identity mode. Make this available as a proper IDENTITY
domain.
The mtk_iommu_v1_def_domain_type() from
commit 8bbe13f52cb7 ("iommu/mediatek-v1: Add def_domain_type") explains
this was needed to allow probe_finalize() to be called, but now the
IDENTITY domain will do the same job so change the returned
def_domain_type.
mkt_v1 is the only driver that returns IOMMU_DOMAIN_UNMANAGED from
def_domain_type(). This allows the next patch to enforce an IDENTITY
domain policy for this driver.
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
---
drivers/iommu/mtk_iommu_v1.c | 21 +++++++++++++++++++--
1 file changed, 19 insertions(+), 2 deletions(-)
diff --git a/drivers/iommu/mtk_iommu_v1.c b/drivers/iommu/mtk_iommu_v1.c
index 8a0a5e5d049f4a..cc3e7d53d33ad9 100644
--- a/drivers/iommu/mtk_iommu_v1.c
+++ b/drivers/iommu/mtk_iommu_v1.c
@@ -319,11 +319,27 @@ static int mtk_iommu_v1_attach_device(struct iommu_domain *domain, struct device
return 0;
}
-static void mtk_iommu_v1_set_platform_dma(struct device *dev)
+static int mtk_iommu_v1_identity_attach(struct iommu_domain *identity_domain,
+ struct device *dev)
{
struct mtk_iommu_v1_data *data = dev_iommu_priv_get(dev);
mtk_iommu_v1_config(data, dev, false);
+ return 0;
+}
+
+static struct iommu_domain_ops mtk_iommu_v1_identity_ops = {
+ .attach_dev = mtk_iommu_v1_identity_attach,
+};
+
+static struct iommu_domain mtk_iommu_v1_identity_domain = {
+ .type = IOMMU_DOMAIN_IDENTITY,
+ .ops = &mtk_iommu_v1_identity_ops,
+};
+
+static void mtk_iommu_v1_set_platform_dma(struct device *dev)
+{
+ mtk_iommu_v1_identity_attach(&mtk_iommu_v1_identity_domain, dev);
}
static int mtk_iommu_v1_map(struct iommu_domain *domain, unsigned long iova,
@@ -443,7 +459,7 @@ static int mtk_iommu_v1_create_mapping(struct device *dev, struct of_phandle_arg
static int mtk_iommu_v1_def_domain_type(struct device *dev)
{
- return IOMMU_DOMAIN_UNMANAGED;
+ return IOMMU_DOMAIN_IDENTITY;
}
static struct iommu_device *mtk_iommu_v1_probe_device(struct device *dev)
@@ -578,6 +594,7 @@ static int mtk_iommu_v1_hw_init(const struct mtk_iommu_v1_data *data)
}
static const struct iommu_ops mtk_iommu_v1_ops = {
+ .identity_domain = &mtk_iommu_v1_identity_domain,
.domain_alloc = mtk_iommu_v1_domain_alloc,
.probe_device = mtk_iommu_v1_probe_device,
.probe_finalize = mtk_iommu_v1_probe_finalize,
--
2.40.1
next prev parent reply other threads:[~2023-05-16 0:01 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <CGME20230516000132eucas1p2d20a1c49d4711fda942a3c3a842384e6@eucas1p2.samsung.com>
2023-05-16 0:00 ` [PATCH v2 00/25] iommu: Make default_domain's mandatory Jason Gunthorpe
2023-05-16 0:00 ` [PATCH v2 01/25] iommu: Add iommu_ops->identity_domain Jason Gunthorpe
2023-05-16 0:00 ` [PATCH v2 02/25] iommu: Add IOMMU_DOMAIN_PLATFORM Jason Gunthorpe
2023-05-16 0:00 ` [PATCH v2 03/25] powerpc/iommu: Setup a default domain and remove set_platform_dma_ops Jason Gunthorpe
2023-05-16 0:00 ` [PATCH v2 04/25] iommu: Add IOMMU_DOMAIN_PLATFORM for S390 Jason Gunthorpe
2023-06-01 18:25 ` Robin Murphy
2023-06-01 19:58 ` Jason Gunthorpe
2023-05-16 0:00 ` [PATCH v2 05/25] iommu/tegra-gart: Remove tegra-gart Jason Gunthorpe
2023-06-01 16:51 ` Thierry Reding
2023-05-16 0:00 ` Jason Gunthorpe [this message]
2023-05-16 0:00 ` [PATCH v2 07/25] iommu: Reorganize iommu_get_default_domain_type() to respect def_domain_type() Jason Gunthorpe
2023-05-16 0:00 ` [PATCH v2 08/25] iommu: Allow an IDENTITY domain as the default_domain in ARM32 Jason Gunthorpe
2023-06-01 18:57 ` Robin Murphy
2023-05-16 0:00 ` [PATCH v2 09/25] iommu/fsl_pamu: Implement an IDENTITY domain Jason Gunthorpe
2023-06-01 19:37 ` Robin Murphy
2023-06-01 19:46 ` Jason Gunthorpe
2023-06-01 19:53 ` Robin Murphy
2023-06-01 20:17 ` Jason Gunthorpe
2023-05-16 0:00 ` [PATCH v2 10/25] iommu/exynos: " Jason Gunthorpe
2023-05-17 22:41 ` Marek Szyprowski
2023-05-16 0:00 ` [PATCH v2 11/25] iommu/tegra-smmu: " Jason Gunthorpe
2023-05-16 0:00 ` [PATCH v2 12/25] iommu/tegra-smmu: Support DMA domains in tegra Jason Gunthorpe
2023-05-16 0:00 ` [PATCH v2 13/25] iommu/omap: Implement an IDENTITY domain Jason Gunthorpe
2023-05-16 0:00 ` [PATCH v2 14/25] iommu/msm: " Jason Gunthorpe
2023-05-16 0:00 ` [PATCH v2 15/25] iommufd/selftest: Make the mock iommu driver into a real driver Jason Gunthorpe
2023-05-16 0:00 ` [PATCH v2 16/25] iommu: Remove ops->set_platform_dma_ops() Jason Gunthorpe
2023-05-16 0:00 ` [PATCH v2 17/25] iommu/qcom_iommu: Add an IOMMU_IDENTITIY_DOMAIN Jason Gunthorpe
2023-05-16 0:00 ` [PATCH v2 18/25] iommu/ipmmu: " Jason Gunthorpe
2023-05-16 0:00 ` [PATCH v2 19/25] iommu/mtk_iommu: " Jason Gunthorpe
2023-05-16 0:00 ` [PATCH v2 20/25] iommu/sun50i: " Jason Gunthorpe
2023-05-16 0:00 ` [PATCH v2 21/25] iommu: Require a default_domain for all iommu drivers Jason Gunthorpe
2023-05-16 0:00 ` [PATCH v2 22/25] iommu: Add __iommu_group_domain_alloc() Jason Gunthorpe
2023-05-16 0:00 ` [PATCH v2 23/25] iommu: Add ops->domain_alloc_paging() Jason Gunthorpe
2023-06-01 19:17 ` Robin Murphy
2023-06-01 20:47 ` Jason Gunthorpe
2023-05-16 0:00 ` [PATCH v2 24/25] iommu: Convert simple drivers with DOMAIN_DMA to domain_alloc_paging() Jason Gunthorpe
2023-05-16 0:00 ` [PATCH v2 25/25] iommu: Convert remaining simple drivers " Jason Gunthorpe
2023-06-01 19:47 ` Robin Murphy
2023-06-01 20:37 ` Jason Gunthorpe
2023-06-09 19:26 ` Jason Gunthorpe
2023-05-17 22:42 ` [PATCH v2 00/25] iommu: Make default_domain's mandatory Marek Szyprowski
2023-05-17 23:32 ` Nicolin Chen
2023-05-18 10:56 ` Steven Price
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