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authorJoerg Roedel <jroedel@suse.de>2017-02-01 15:23:08 +0300
committerJoerg Roedel <jroedel@suse.de>2017-02-10 15:44:57 +0300
commitb0119e870837dcd15a207b4701542ebac5d19b45 (patch)
tree07c547fed49f739a7d9b4a64c8163d9908db48e2 /include/linux/iommu.h
parentc09e22d5370739e16463c113525df51b5980b1d5 (diff)
downloadlinux-b0119e870837dcd15a207b4701542ebac5d19b45.tar.xz
iommu: Introduce new 'struct iommu_device'
This struct represents one hardware iommu in the iommu core code. For now it only has the iommu-ops associated with it, but that will be extended soon. The register/unregister interface is also added, as well as making use of it in the Intel and AMD IOMMU drivers. Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'include/linux/iommu.h')
-rw-r--r--include/linux/iommu.h35
1 files changed, 35 insertions, 0 deletions
diff --git a/include/linux/iommu.h b/include/linux/iommu.h
index 085e1f0e6c07..900ddd212364 100644
--- a/include/linux/iommu.h
+++ b/include/linux/iommu.h
@@ -204,6 +204,26 @@ struct iommu_ops {
unsigned long pgsize_bitmap;
};
+/**
+ * struct iommu_device - IOMMU core representation of one IOMMU hardware
+ * instance
+ * @list: Used by the iommu-core to keep a list of registered iommus
+ * @ops: iommu-ops for talking to this iommu
+ */
+struct iommu_device {
+ struct list_head list;
+ const struct iommu_ops *ops;
+};
+
+int iommu_device_register(struct iommu_device *iommu);
+void iommu_device_unregister(struct iommu_device *iommu);
+
+static inline void iommu_device_set_ops(struct iommu_device *iommu,
+ const struct iommu_ops *ops)
+{
+ iommu->ops = ops;
+}
+
#define IOMMU_GROUP_NOTIFY_ADD_DEVICE 1 /* Device added */
#define IOMMU_GROUP_NOTIFY_DEL_DEVICE 2 /* Pre Device removed */
#define IOMMU_GROUP_NOTIFY_BIND_DRIVER 3 /* Pre Driver bind */
@@ -361,6 +381,7 @@ const struct iommu_ops *iommu_ops_from_fwnode(struct fwnode_handle *fwnode);
struct iommu_ops {};
struct iommu_group {};
struct iommu_fwspec {};
+struct iommu_device {};
static inline bool iommu_present(struct bus_type *bus)
{
@@ -558,6 +579,20 @@ static inline void iommu_device_destroy(struct device *dev)
{
}
+static inline int iommu_device_register(struct iommu_device *iommu)
+{
+ return -ENODEV;
+}
+
+static inline void iommu_device_set_ops(struct iommu_device *iommu,
+ const struct iommu_ops *ops)
+{
+}
+
+static inline void iommu_device_unregister(struct iommu_device *iommu)
+{
+}
+
static inline int iommu_device_link(struct device *dev, struct device *link)
{
return -EINVAL;