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driver core: Add iommu_group tracking to struct device

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IOMMU groups allow IOMMU drivers to represent DMA visibility
and isolation of devices.  Multiple devices may be grouped
together for the purposes of DMA.  Placing a pointer on
struct device enable easy access for things like streaming
DMA programming and drivers like VFIO.

Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
This commit is contained in:
Alex Williamson 2012-05-30 14:18:41 -06:00 committed by Joerg Roedel
parent 3ebb956600
commit 74416e1e07
1 changed files with 2 additions and 0 deletions
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include/linux/device.h
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@ -36,6 +36,7 @@ struct subsys_private;
struct bus_type;
struct device_node;
struct iommu_ops;
struct iommu_group;
struct bus_attribute {
struct attribute attr;
@ -687,6 +688,7 @@ struct device {
const struct attribute_group **groups; /* optional groups */
void (*release)(struct device *dev);
struct iommu_group *iommu_group;
};
/* Get the wakeup routines, which depend on struct device */