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| author | Joerg Roedel <jroedel@suse.de> | 2015-05-28 19:41:32 +0300 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2015-06-09 09:55:23 +0300 |
| commit | 2c1296d92ac0367364bcb73a43c12a0bdfbfee75 (patch) | |
| tree | b1cd702a8a1bb45143421bc839f5dad791028196 /drivers/iommu | |
| parent | e39cb8a3aa988a74433a3f26443b454cca033651 (diff) | |
| download | linux-2c1296d92ac0367364bcb73a43c12a0bdfbfee75.tar.xz | |
iommu: Add iommu_get_domain_for_dev function
This function can be used to request the current domain a
device is attached to.
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu')
| -rw-r--r-- | drivers/iommu/iommu.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c index 7bce522c2367..a0a38bd2668b 100644 --- a/drivers/iommu/iommu.c +++ b/drivers/iommu/iommu.c @@ -1076,6 +1076,24 @@ out_unlock: } EXPORT_SYMBOL_GPL(iommu_detach_device); +struct iommu_domain *iommu_get_domain_for_dev(struct device *dev) +{ + struct iommu_domain *domain; + struct iommu_group *group; + + group = iommu_group_get(dev); + /* FIXME: Remove this when groups a mandatory for iommu drivers */ + if (group == NULL) + return NULL; + + domain = group->domain; + + iommu_group_put(group); + + return domain; +} +EXPORT_SYMBOL_GPL(iommu_get_domain_for_dev); + /* * IOMMU groups are really the natrual working unit of the IOMMU, but * the IOMMU API works on domains and devices. Bridge that gap by |