From: Dmitry Osipenko <digetx@gmail.com>
To: Joerg Roedel <joro@8bytes.org>,
Robin Murphy <robin.murphy@arm.com>,
Thierry Reding <thierry.reding@gmail.com>,
Jonathan Hunter <jonathanh@nvidia.com>,
Rob Herring <robh+dt@kernel.org>
Cc: iommu@lists.linux-foundation.org, devicetree@vger.kernel.org,
linux-tegra@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH v3 03/19] iommu/tegra: gart: Ignore devices without IOMMU phandle in DT
Date: Sat, 18 Aug 2018 18:54:14 +0300 [thread overview]
Message-ID: <20180818155430.5586-4-digetx@gmail.com> (raw)
In-Reply-To: <20180818155430.5586-1-digetx@gmail.com>
GART can't handle all devices, hence ignore devices that aren't related
to GART. IOMMU phandle must be explicitly assign to devices in the device
tree.
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
---
drivers/iommu/tegra-gart.c | 14 +++++++++++++-
1 file changed, 13 insertions(+), 1 deletion(-)
diff --git a/drivers/iommu/tegra-gart.c b/drivers/iommu/tegra-gart.c
index e9524ed264cf..f6cf5cd5aaca 100644
--- a/drivers/iommu/tegra-gart.c
+++ b/drivers/iommu/tegra-gart.c
@@ -342,8 +342,12 @@ static bool gart_iommu_capable(enum iommu_cap cap)
static int gart_iommu_add_device(struct device *dev)
{
- struct iommu_group *group = iommu_group_get_for_dev(dev);
+ struct iommu_group *group;
+ if (!dev->iommu_fwspec)
+ return -ENODEV;
+
+ group = iommu_group_get_for_dev(dev);
if (IS_ERR(group))
return PTR_ERR(group);
@@ -360,6 +364,12 @@ static void gart_iommu_remove_device(struct device *dev)
iommu_device_unlink(&gart_handle->iommu, 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,
@@ -373,6 +383,7 @@ static const struct iommu_ops gart_iommu_ops = {
.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 tegra_gart_suspend(struct device *dev)
@@ -438,6 +449,7 @@ 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) {
--
2.18.0
next prev parent reply other threads:[~2018-08-18 15:55 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-08-18 15:54 [PATCH v3 00/19] IOMMU: Tegra GART driver clean up and optimization Dmitry Osipenko
2018-08-18 15:54 ` [PATCH v3 01/19] iommu/tegra: gart: Remove pr_fmt and clean up includes Dmitry Osipenko
2018-08-18 15:54 ` [PATCH v3 02/19] iommu/tegra: gart: Clean up driver probe errors handling Dmitry Osipenko
2018-08-18 15:54 ` Dmitry Osipenko [this message]
2018-08-18 15:54 ` [PATCH v3 04/19] iommu: Introduce iotlb_sync_map callback Dmitry Osipenko
2018-08-18 15:54 ` [PATCH v3 05/19] iommu/tegra: gart: Optimize mapping / unmapping performance Dmitry Osipenko
2018-08-18 15:54 ` [PATCH v3 06/19] dt-bindings: memory: tegra: Squash tegra20-gart into tegra20-mc Dmitry Osipenko
2018-08-20 19:12 ` Rob Herring
2018-08-20 19:27 ` Dmitry Osipenko
2018-08-20 19:35 ` Dmitry Osipenko
2018-08-28 10:47 ` Thierry Reding
2018-08-28 13:09 ` Dmitry Osipenko
2018-08-18 15:54 ` [PATCH v3 07/19] ARM: dts: tegra20: Update Memory Controller node to the new binding Dmitry Osipenko
2018-08-18 15:54 ` [PATCH v3 08/19] memory: tegra: Don't invoke Tegra30+ specific memory timing setup on Tegra20 Dmitry Osipenko
2018-08-18 15:54 ` [PATCH v3 09/19] memory: tegra: Adapt to Tegra20 device-tree binding changes Dmitry Osipenko
2018-09-03 21:06 ` Marcel Ziswiler
2018-09-04 8:56 ` Dmitry Osipenko
2018-08-18 15:54 ` [PATCH v3 10/19] memory: tegra: Read client ID on GART page fault Dmitry Osipenko
2018-08-18 15:54 ` [PATCH v3 11/19] iommu/tegra: gart: Integrate with Memory Controller driver Dmitry Osipenko
2018-08-18 15:54 ` [PATCH v3 12/19] iommu/tegra: gart: Fix spinlock recursion Dmitry Osipenko
2018-08-18 15:54 ` [PATCH v3 13/19] iommu/tegra: gart: Fix NULL pointer dereference Dmitry Osipenko
2018-08-18 15:54 ` [PATCH v3 14/19] iommu/tegra: gart: Allow only one active domain at a time Dmitry Osipenko
2018-08-18 15:54 ` [PATCH v3 15/19] iommu/tegra: gart: Don't use managed resources Dmitry Osipenko
2018-08-18 15:54 ` [PATCH v3 16/19] iommu/tegra: gart: Prepend error/debug messages with "GART:" Dmitry Osipenko
2018-08-18 15:54 ` [PATCH v3 17/19] iommu/tegra: gart: Don't detach devices from inactive domains Dmitry Osipenko
2018-08-18 15:54 ` [PATCH v3 18/19] iommu/tegra: gart: Simplify clients-tracking code Dmitry Osipenko
2018-08-18 15:54 ` [PATCH v3 19/19] iommu/tegra: gart: Perform code refactoring Dmitry Osipenko
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