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From: Dmitry Osipenko <digetx@gmail.com>
To: Joerg Roedel <joro@8bytes.org>,
	Thierry Reding <thierry.reding@gmail.com>,
	Jonathan Hunter <jonathanh@nvidia.com>
Cc: linux-tegra@vger.kernel.org, iommu@lists.linux-foundation.org,
	linux-kernel@vger.kernel.org
Subject: [PATCH v1 6/9] iommu/tegra: gart: Ignore devices without IOMMU phandle in DT
Date: Tue,  8 May 2018 21:16:57 +0300	[thread overview]
Message-ID: <20180508181700.5169-7-digetx@gmail.com> (raw)
In-Reply-To: <20180508181700.5169-1-digetx@gmail.com>

GART can't handle all devices, ignore devices that aren't related to GART.
Device tree must explicitly assign GART IOMMU to the devices.

Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
---
 drivers/iommu/tegra-gart.c | 33 ++++++++++++++++++++++++++++++++-
 1 file changed, 32 insertions(+), 1 deletion(-)

diff --git a/drivers/iommu/tegra-gart.c b/drivers/iommu/tegra-gart.c
index 39305224c48d..5b2d27620350 100644
--- a/drivers/iommu/tegra-gart.c
+++ b/drivers/iommu/tegra-gart.c
@@ -366,6 +366,26 @@ static void gart_iommu_remove_device(struct device *dev)
 	iommu_device_unlink(&gart_handle->iommu, dev);
 }
 
+static int gart_iommu_check_device(struct gart_device *gart,
+				   struct device *dev);
+
+struct iommu_group *gart_iommu_device_group(struct device *dev)
+{
+	int err;
+
+	err = gart_iommu_check_device(gart_handle, dev);
+	if (err)
+		return ERR_PTR(err);
+
+	return generic_device_group(dev);
+}
+
+static int gart_iommu_of_xlate(struct device *dev,
+			       struct of_phandle_args *args)
+{
+	return 0;
+}
+
 static const struct iommu_ops gart_iommu_ops = {
 	.capable	= gart_iommu_capable,
 	.domain_alloc	= gart_iommu_domain_alloc,
@@ -374,14 +394,24 @@ static const struct iommu_ops gart_iommu_ops = {
 	.detach_dev	= gart_iommu_detach_dev,
 	.add_device	= gart_iommu_add_device,
 	.remove_device	= gart_iommu_remove_device,
-	.device_group	= generic_device_group,
+	.device_group	= gart_iommu_device_group,
 	.map		= gart_iommu_map,
 	.map_sg		= default_iommu_map_sg,
 	.unmap		= gart_iommu_unmap,
 	.iova_to_phys	= gart_iommu_iova_to_phys,
 	.pgsize_bitmap	= GART_IOMMU_PGSIZES,
+	.of_xlate	= gart_iommu_of_xlate,
 };
 
+static int gart_iommu_check_device(struct gart_device *gart,
+				   struct device *dev)
+{
+	if (!dev->iommu_fwspec || dev->iommu_fwspec->ops != &gart_iommu_ops)
+		return -ENODEV;
+
+	return 0;
+}
+
 static int tegra_gart_suspend(struct device *dev)
 {
 	struct gart_device *gart = dev_get_drvdata(dev);
@@ -462,6 +492,7 @@ static int tegra_gart_probe(struct platform_device *pdev)
 	}
 
 	iommu_device_set_ops(&gart->iommu, &gart_iommu_ops);
+	iommu_device_set_fwnode(&gart->iommu, dev->fwnode);
 
 	ret = iommu_device_register(&gart->iommu);
 	if (ret) {
-- 
2.17.0

  parent reply	other threads:[~2018-05-08 18:17 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-05-08 18:16 [PATCH v1 0/9] Tegra GART driver clean up and optimization Dmitry Osipenko
2018-05-08 18:16 ` [PATCH v1 1/9] memory: tegra: Provide facility for integration with the GART driver Dmitry Osipenko
2018-05-08 18:16 ` [PATCH v1 2/9] iommu/tegra: gart: Provide access to Memory Controller driver Dmitry Osipenko
2018-05-08 18:16 ` [PATCH v1 3/9] iommu/tegra: gart: Remove code related to module unloading Dmitry Osipenko
2018-05-08 18:16 ` [PATCH v1 4/9] iommu/tegra: gart: Remove pr_fmt and clean up includes Dmitry Osipenko
2018-05-08 18:16 ` [PATCH v1 5/9] iommu/tegra: gart: Clean up driver probe failure unwinding Dmitry Osipenko
2018-05-08 18:16 ` Dmitry Osipenko [this message]
2018-05-11 11:34   ` [PATCH v1 6/9] iommu/tegra: gart: Ignore devices without IOMMU phandle in DT Robin Murphy
2018-05-11 15:34     ` Dmitry Osipenko
2018-05-08 18:16 ` [PATCH v1 7/9] iommu/tegra: gart: Provide single domain and group for all devices Dmitry Osipenko
2018-05-11 11:12   ` Dmitry Osipenko
2018-05-11 12:32   ` Robin Murphy
2018-05-11 20:05     ` Dmitry Osipenko
2018-05-14 18:18       ` Robin Murphy
2018-05-16 13:43         ` Dmitry Osipenko
2018-05-08 18:16 ` [PATCH v1 8/9] iommu: Introduce iotlb_sync_map callback Dmitry Osipenko
2018-05-11 13:02   ` Robin Murphy
2018-05-11 19:58     ` Dmitry Osipenko
2018-05-08 18:17 ` [PATCH v1 9/9] iommu/tegra: gart: Optimize mapping / unmapping performance Dmitry Osipenko

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