Merge tag 'block-5.13-2021-05-07' of git://git.kernel.dk/linux-block

[linux-2.6-microblaze.git] / drivers / iommu / iommu-sva-lib.h

diff --git a/drivers/iommu/iommu-sva-lib.h b/drivers/iommu/iommu-sva-lib.h
index b40990a..0311550 100644 (file)
--- a/drivers/iommu/iommu-sva-lib.h
+++ b/drivers/iommu/iommu-sva-lib.h
@@ -12,4 +12,57 @@ int iommu_sva_alloc_pasid(struct mm_struct *mm, ioasid_t min, ioasid_t max);
 void iommu_sva_free_pasid(struct mm_struct *mm);
 struct mm_struct *iommu_sva_find(ioasid_t pasid);
 
+/* I/O Page fault */
+struct device;
+struct iommu_fault;
+struct iopf_queue;
+
+#ifdef CONFIG_IOMMU_SVA_LIB
+int iommu_queue_iopf(struct iommu_fault *fault, void *cookie);
+
+int iopf_queue_add_device(struct iopf_queue *queue, struct device *dev);
+int iopf_queue_remove_device(struct iopf_queue *queue,
+                            struct device *dev);
+int iopf_queue_flush_dev(struct device *dev);
+struct iopf_queue *iopf_queue_alloc(const char *name);
+void iopf_queue_free(struct iopf_queue *queue);
+int iopf_queue_discard_partial(struct iopf_queue *queue);
+
+#else /* CONFIG_IOMMU_SVA_LIB */
+static inline int iommu_queue_iopf(struct iommu_fault *fault, void *cookie)
+{
+       return -ENODEV;
+}
+
+static inline int iopf_queue_add_device(struct iopf_queue *queue,
+                                       struct device *dev)
+{
+       return -ENODEV;
+}
+
+static inline int iopf_queue_remove_device(struct iopf_queue *queue,
+                                          struct device *dev)
+{
+       return -ENODEV;
+}
+
+static inline int iopf_queue_flush_dev(struct device *dev)
+{
+       return -ENODEV;
+}
+
+static inline struct iopf_queue *iopf_queue_alloc(const char *name)
+{
+       return NULL;
+}
+
+static inline void iopf_queue_free(struct iopf_queue *queue)
+{
+}
+
+static inline int iopf_queue_discard_partial(struct iopf_queue *queue)
+{
+       return -ENODEV;
+}
+#endif /* CONFIG_IOMMU_SVA_LIB */
 #endif /* _IOMMU_SVA_LIB_H */