1 files changed, 79 insertions, 0 deletions
diff --git a/include/linux/hisi/ion-iommu.h b/include/linux/hisi/ion-iommu.h
new file mode 100644
index 000000000000..6e73ae3ff494
--- /dev/null
+++ b/include/linux/hisi/ion-iommu.h
@@ -0,0 +1,79 @@
+#ifndef _HISI_IOMMU_H_
+#define _HISI_IOMMU_H_
+
+#include <linux/list.h>
+#include <linux/iommu.h>
+#include <linux/platform_device.h>
+#include <linux/dma-mapping.h>
+#ifdef CONFIG_HISI_IODOMAIN_API
+
+struct section_info {
+	unsigned int iova_start;
+	unsigned int iova_size;
+	unsigned int page_size;
+	unsigned int align;
+};
+struct hisi_iommu_domain {
+	struct iommu_domain *domain;
+	struct gen_pool *iova_pool;
+	struct section_info range;
+};
+
+/**
+ * hisi iommu domain interface
+ */
+struct hisi_iommu_domain * hisi_get_domain(void);
+size_t hisi_iommu_iova_size(void);
+size_t hisi_iommu_iova_available(void);
+void hisi_iommu_free_iova(unsigned long iova, size_t size);
+unsigned long hisi_iommu_alloc_iova(size_t size, unsigned long align);
+int hisi_iommu_map_range(struct iommu_domain *domain,unsigned long iova_start, struct scatterlist *sgl,
+			unsigned long iova_size,unsigned int prot);
+int hisi_iommu_unmap_range(struct iommu_domain *domain,unsigned long iova_start,unsigned long iova_size);
+int hisi_iommu_map_domain(struct scatterlist *sg,struct iommu_map_format *format);
+int hisi_iommu_unmap_domain(struct iommu_map_format *format);
+
+phys_addr_t hisi_iommu_domain_iova_to_phys(unsigned long iova);
+
+unsigned int hisi_iommu_page_size (void);
+bool hisi_iommu_off_on(void);
+int hisi_iommu_get_info(unsigned int *iova_start, unsigned int *pgtbl_base);
+
+#else
+
+/**
+ * hisi iommu domain interface
+ */
+static inline int hisi_iommu_map_domain(struct scatterlist *sg,
+		struct iommu_map_format *format)
+{
+	return 0;
+}
+
+static inline int hisi_iommu_unmap_domain(struct iommu_map_format *format)
+{
+	return 0;
+}
+
+static inline phys_addr_t hisi_iommu_domain_iova_to_phys(unsigned long iova)
+{
+	return 0;
+}
+static inline unsigned int hisi_iommu_page_size (void)
+{
+	return SZ_4K;
+}
+
+static inline bool hisi_iommu_off_on(void)
+{
+	return false;
+}
+
+static inline int hisi_iommu_get_info(unsigned int *iova_start, unsigned int *pgtbl_base)
+{
+	return 0;
+}
+
+#endif /* CONFIG_HISI_IODOMAIN_API */
+
+#endif /* _HISI_IOMMU_H_ */