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| author | Joerg Roedel <jroedel@suse.de> | 2018-11-30 12:51:52 +0100 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2018-12-17 10:38:43 +0100 |
| commit | dbba197edf32209d110727a02d3a91de4c88520f (patch) | |
| tree | 4dfd83519bf8064b0fe7ad2bfda2abd1e6242218 /include/linux/device.h | |
| parent | db5d6a70043a0073e59af99cd4fd6bcb5bd3ace2 (diff) | |
| download | lwn-dbba197edf32209d110727a02d3a91de4c88520f.tar.gz lwn-dbba197edf32209d110727a02d3a91de4c88520f.zip | |
driver core: Introduce device_iommu_mapped() function
Some places in the kernel check the iommu_group pointer in
'struct device' in order to find out whether a device is
mapped by an IOMMU.
This is not good way to make this check, as the pointer will
be moved to 'struct dev_iommu_data'. This way to make the
check is also not very readable.
Introduce an explicit function to perform this check.
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'include/linux/device.h')
| -rw-r--r-- | include/linux/device.h | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/include/linux/device.h b/include/linux/device.h index 1b25c7a43f4c..6cb4640b6160 100644 --- a/include/linux/device.h +++ b/include/linux/device.h @@ -1058,6 +1058,16 @@ static inline struct device *kobj_to_dev(struct kobject *kobj) return container_of(kobj, struct device, kobj); } +/** + * device_iommu_mapped - Returns true when the device DMA is translated + * by an IOMMU + * @dev: Device to perform the check on + */ +static inline bool device_iommu_mapped(struct device *dev) +{ + return (dev->iommu_group != NULL); +} + /* Get the wakeup routines, which depend on struct device */ #include <linux/pm_wakeup.h> |