From: Alex Williamson <alex.williamson@redhat.com>
Date: Wed, 30 May 2012 20:18:41 +0000 (-0600)
Subject: driver core: Add iommu_group tracking to struct device
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=74416e1e07660798379ce10a210bf4fd35b84f9f;p=linux-beck.git

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>
---

diff --git a/include/linux/device.h b/include/linux/device.h
index 161d96241b1b..d0e4d99405ae 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -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 */