iommu/tegra-gart: Add iommu_group support (15f9a310) · Commits · 戴 / test

As the last step to making groups mandatory, clean up the remaining drivers by adding basic support. Whilst it may not perfectly reflect the isolation capabilities of the hardware, using generic_device_group() should at least maintain existing behaviour with respect to the API. Signed-off-by:

Robin Murphy <robin.murphy@arm.com> Tested-by:

Dmitry Osipenko <digetx@gmail.com> Signed-off-by:

Joerg Roedel <jroedel@suse.de>

drivers/iommu/tegra-gart.c

+19 −0

Original line number	Diff line number	Diff line
		@@ -334,12 +334,31 @@ static bool gart_iommu_capable(enum iommu_cap cap)
		return false;
		}

		static int gart_iommu_add_device(struct device *dev)
		{
		struct iommu_group *group = iommu_group_get_for_dev(dev);

		if (IS_ERR(group))
		return PTR_ERR(group);

		iommu_group_put(group);
		return 0;
		}

		static void gart_iommu_remove_device(struct device *dev)
		{
		iommu_group_remove_device(dev);
		}

		static const struct iommu_ops gart_iommu_ops = {
		.capable = gart_iommu_capable,
		.domain_alloc = gart_iommu_domain_alloc,
		.domain_free = gart_iommu_domain_free,
		.attach_dev = gart_iommu_attach_dev,
		.detach_dev = gart_iommu_detach_dev,
		.add_device = gart_iommu_add_device,
		.remove_device = gart_iommu_remove_device,
		.device_group = generic_device_group,
		.map = gart_iommu_map,
		.map_sg = default_iommu_map_sg,
		.unmap = gart_iommu_unmap,

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