Merge tag 'iommu-updates-v4.9' of git://git.kernel.org/pub/scm/linux/kernel/git/joro...

[cascardo/linux.git] / include / linux / iommu.h

diff --git a/include/linux/iommu.h b/include/linux/iommu.h
index a35fb8b..436dc21 100644 (file)
--- a/include/linux/iommu.h
+++ b/include/linux/iommu.h
@@ -331,10 +331,32 @@ extern struct iommu_group *pci_device_group(struct device *dev);
 /* Generic device grouping function */
 extern struct iommu_group *generic_device_group(struct device *dev);
 
+/**
+ * struct iommu_fwspec - per-device IOMMU instance data
+ * @ops: ops for this device's IOMMU
+ * @iommu_fwnode: firmware handle for this device's IOMMU
+ * @iommu_priv: IOMMU driver private data for this device
+ * @num_ids: number of associated device IDs
+ * @ids: IDs which this device may present to the IOMMU
+ */
+struct iommu_fwspec {
+       const struct iommu_ops  *ops;
+       struct fwnode_handle    *iommu_fwnode;
+       void                    *iommu_priv;
+       unsigned int            num_ids;
+       u32                     ids[1];
+};
+
+int iommu_fwspec_init(struct device *dev, struct fwnode_handle *iommu_fwnode,
+                     const struct iommu_ops *ops);
+void iommu_fwspec_free(struct device *dev);
+int iommu_fwspec_add_ids(struct device *dev, u32 *ids, int num_ids);
+
 #else /* CONFIG_IOMMU_API */
 
 struct iommu_ops {};
 struct iommu_group {};
+struct iommu_fwspec {};
 
 static inline bool iommu_present(struct bus_type *bus)
 {
@@ -541,6 +563,23 @@ static inline void iommu_device_unlink(struct device *dev, struct device *link)
 {
 }
 
+static inline int iommu_fwspec_init(struct device *dev,
+                                   struct fwnode_handle *iommu_fwnode,
+                                   const struct iommu_ops *ops)
+{
+       return -ENODEV;
+}
+
+static inline void iommu_fwspec_free(struct device *dev)
+{
+}
+
+static inline int iommu_fwspec_add_ids(struct device *dev, u32 *ids,
+                                      int num_ids)
+{
+       return -ENODEV;
+}
+
 #endif /* CONFIG_IOMMU_API */
 
 #endif /* __LINUX_IOMMU_H */