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Commit 35cf248f authored by Joerg Roedel's avatar Joerg Roedel
Browse files

iommu/amd: Implement dm_region call-backs 



Add the get_dm_regions and put_dm_regions callbacks to the
iommu_ops of the AMD IOMMU driver.

Signed-off-by: default avatarJoerg Roedel <jroedel@suse.de>
parent d290f1e7

drivers/iommu/amd_iommu.c

+43 −0
Original line number Diff line number Diff line
@@ -3412,6 +3412,47 @@ static bool amd_iommu_capable(enum iommu_cap cap) 
	return false;

}



static void amd_iommu_get_dm_regions(struct device *dev,

				     struct list_head *head)

{

	struct unity_map_entry *entry;

	u16 devid;



	devid = get_device_id(dev);



	list_for_each_entry(entry, &amd_iommu_unity_map, list) {

		struct iommu_dm_region *region;



		if (devid < entry->devid_start || devid > entry->devid_end)

			continue;



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

		if (!region) {

			pr_err("Out of memory allocating dm-regions for %s\n",

				dev_name(dev));

			return;

		}



		region->start = entry->address_start;

		region->length = entry->address_end - entry->address_start;

		if (entry->prot & IOMMU_PROT_IR)

			region->prot |= IOMMU_READ;

		if (entry->prot & IOMMU_PROT_IW)

			region->prot |= IOMMU_WRITE;



		list_add_tail(&region->list, head);

	}

}



static void amd_iommu_put_dm_regions(struct device *dev,

				     struct list_head *head)

{

	struct iommu_dm_region *entry, *next;



	list_for_each_entry_safe(entry, next, head, list)

		kfree(entry);

}



static const struct iommu_ops amd_iommu_ops = {

	.capable = amd_iommu_capable,

	.domain_alloc = amd_iommu_domain_alloc,
@@ -3422,6 +3463,8 @@ static const struct iommu_ops amd_iommu_ops = { 
	.unmap = amd_iommu_unmap,

	.map_sg = default_iommu_map_sg,

	.iova_to_phys = amd_iommu_iova_to_phys,

	.get_dm_regions = amd_iommu_get_dm_regions,

	.put_dm_regions = amd_iommu_put_dm_regions,

	.pgsize_bitmap	= AMD_IOMMU_PGSIZES,

};