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

login
register
mail settings
Submitter Alex Williamson
Date May 22, 2012, 5:04 a.m.
Message ID <20120522050438.5871.56283.stgit@bling.home>
Download mbox | patch
Permalink /patch/160545/
State New
Headers show

Comments

Alex Williamson - May 22, 2012, 5:04 a.m.
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>
---

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

Patch

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 */