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Commit aa759fd3 authored by Marek Szyprowski's avatar Marek Szyprowski Committed by Joerg Roedel
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iommu/exynos: Add callback for initializing devices from device tree 



This patch adds implementation of of_xlate callback, which prepares
masters device for attaching to IOMMU. This callback is called during
creating devices from device tree.

Signed-off-by: default avatarMarek Szyprowski <m.szyprowski@samsung.com>
Tested-by: default avatarJavier Martinez Canillas <javier.martinez@collabora.co.uk>
Signed-off-by: default avatarJoerg Roedel <jroedel@suse.de>
parent 8ed55c81

drivers/iommu/exynos-iommu.c

+28 −0
Original line number Original line Diff line number Diff line
@@ -1146,6 +1146,33 @@ static void exynos_iommu_remove_device(struct device *dev) 
	iommu_group_remove_device(dev);

	iommu_group_remove_device(dev);

}

}





static int exynos_iommu_of_xlate(struct device *dev,

				 struct of_phandle_args *spec)

{

	struct exynos_iommu_owner *owner = dev->archdata.iommu;

	struct platform_device *sysmmu = of_find_device_by_node(spec->np);

	struct sysmmu_drvdata *data;



	if (!sysmmu)

		return -ENODEV;



	data = platform_get_drvdata(sysmmu);

	if (!data)

		return -ENODEV;



	if (!owner) {

		owner = kzalloc(sizeof(*owner), GFP_KERNEL);

		if (!owner)

			return -ENOMEM;



		INIT_LIST_HEAD(&owner->controllers);

		dev->archdata.iommu = owner;

	}



	list_add_tail(&data->owner_node, &owner->controllers);

	return 0;

}



static struct iommu_ops exynos_iommu_ops = {

static struct iommu_ops exynos_iommu_ops = {

	.domain_alloc = exynos_iommu_domain_alloc,

	.domain_alloc = exynos_iommu_domain_alloc,

	.domain_free = exynos_iommu_domain_free,

	.domain_free = exynos_iommu_domain_free,
@@ -1158,6 +1185,7 @@ static struct iommu_ops exynos_iommu_ops = { 
	.add_device = exynos_iommu_add_device,

	.add_device = exynos_iommu_add_device,

	.remove_device = exynos_iommu_remove_device,

	.remove_device = exynos_iommu_remove_device,

	.pgsize_bitmap = SECT_SIZE | LPAGE_SIZE | SPAGE_SIZE,

	.pgsize_bitmap = SECT_SIZE | LPAGE_SIZE | SPAGE_SIZE,

	.of_xlate = exynos_iommu_of_xlate,

};

};





static bool init_done;

static bool init_done;