[PATCH v2 01/13] driver core: Add iommu_group tracking to struct device

Alex Williamson
2012-05-22T05:04:39Z

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-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
Acked-by: Greg Kroah-Hartman <gregkh-hQyY1W1yCW8ekmWlsbkhG0B+6BGkLq7r@public.gmane.org>
---

include/linux/device.h | 2 ++
1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/include/linux/device.h b/include/linux/device.h
index 5ad17cc..13dd26b 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -35,6 +35,7 @@ struct subsys_private;
struct bus_type;
struct device_node;
struct iommu_ops;
+struct iommu_group;

struct bus_attribute {
struct attribute attr;
@@ -677,6 +678,7 @@ 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 */