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iommu/core: Create central IOMMU group lookup/creation interface

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Currently each IOMMU driver that supports IOMMU groups has its own
code for discovering the base device used in grouping.  This code
is generally not specific to the IOMMU hardware, but to the bus of
the devices managed by the IOMMU.  We can therefore create a common
interface for supporting devices on different buses.

Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Alex Williamson 2014-07-03 09:51:18 -06:00 • committed by Joerg Roedel
parent 4c834452aa
commit 104a1c13ac
2 changed files with 183 additions and 0 deletions
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include/linux/iommu.h
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@ -181,6 +181,7 @@ extern int iommu_group_register_notifier(struct iommu_group *group,
extern int iommu_group_unregister_notifier(struct iommu_group *group,
struct notifier_block *nb);
extern int iommu_group_id(struct iommu_group *group);
extern struct iommu_group *iommu_group_get_for_dev(struct device *dev);
extern int iommu_domain_get_attr(struct iommu_domain *domain, enum iommu_attr,
void *data);