Commit 74416e1e authored May 30, 2012 by Alex Williamson Committed by Joerg Roedel Jun 25, 2012

driver core: Add iommu_group tracking to struct device



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>

parent 3ebb9566

include/linux/device.h

+2 −0

Original line number	Diff line number	Diff line
		@@ -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 */