Driver core: Add iommu_ops to bus_type
This is the starting point to make the iommu_ops used for
the iommu-api a per-bus-type structure. It is required to
easily implement bus-specific setup in the iommu-layer.
The first user will be the iommu-group attribute in sysfs.
Acked-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
diff --git a/include/linux/device.h b/include/linux/device.h
index c20dfbf..e838e14 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -33,6 +33,7 @@
struct subsys_private;
struct bus_type;
struct device_node;
+struct iommu_ops;
struct bus_attribute {
struct attribute attr;
@@ -67,6 +68,9 @@
* @resume: Called to bring a device on this bus out of sleep mode.
* @pm: Power management operations of this bus, callback the specific
* device driver's pm-ops.
+ * @iommu_ops IOMMU specific operations for this bus, used to attach IOMMU
+ * driver implementations to a bus and allow the driver to do
+ * bus-specific setup
* @p: The private data of the driver core, only the driver core can
* touch this.
*
@@ -96,6 +100,8 @@
const struct dev_pm_ops *pm;
+ struct iommu_ops *iommu_ops;
+
struct subsys_private *p;
};
diff --git a/include/linux/iommu.h b/include/linux/iommu.h
index 6470cd8..dca83d3 100644
--- a/include/linux/iommu.h
+++ b/include/linux/iommu.h
@@ -25,6 +25,7 @@
#define IOMMU_WRITE (2)
#define IOMMU_CACHE (4) /* DMA cache coherency */
+struct bus_type;
struct device;
struct iommu_domain {
@@ -52,6 +53,7 @@
};
extern void register_iommu(struct iommu_ops *ops);
+extern int bus_set_iommu(struct bus_type *bus, struct iommu_ops *ops);
extern bool iommu_found(void);
extern struct iommu_domain *iommu_domain_alloc(void);
extern void iommu_domain_free(struct iommu_domain *domain);