1 files changed, 55 insertions, 0 deletions

diff --git a/include/linux/iommu-common.h b/include/linux/iommu-common.h
new file mode 100644
index 000000000000..6be5c863f329
--- /dev/null
+++ b/include/linux/iommu-common.h
@@ -0,0 +1,55 @@
+#ifndef _LINUX_IOMMU_COMMON_H
+#define _LINUX_IOMMU_COMMON_H
+
+#include <linux/spinlock_types.h>
+#include <linux/device.h>
+#include <asm/page.h>
+
+#define IOMMU_POOL_HASHBITS     4
+#define IOMMU_NR_POOLS          (1 << IOMMU_POOL_HASHBITS)
+
+struct iommu_pool {
+        unsigned long   start;
+        unsigned long   end;
+        unsigned long   hint;
+        spinlock_t      lock;
+};
+
+struct iommu_table;
+
+struct iommu_tbl_ops {
+        unsigned long   (*cookie_to_index)(u64, void *);
+        void            (*demap)(void *, unsigned long, unsigned long);
+        void            (*reset)(struct iommu_table *);
+};
+
+struct iommu_table {
+        unsigned long           page_table_map_base;
+        unsigned long           page_table_shift;
+        unsigned long           nr_pools;
+        const struct iommu_tbl_ops  *iommu_tbl_ops;
+        unsigned long           poolsize;
+        struct iommu_pool       arena_pool[IOMMU_NR_POOLS];
+        u32                     flags;
+#define IOMMU_HAS_LARGE_POOL    0x00000001
+        struct iommu_pool       large_pool;
+        unsigned long           *map;
+};
+
+extern void iommu_tbl_pool_init(struct iommu_table *iommu,
+                                unsigned long num_entries,
+                                u32 page_table_shift,
+                                const struct iommu_tbl_ops *iommu_tbl_ops,
+                                bool large_pool, u32 npools);
+
+extern unsigned long iommu_tbl_range_alloc(struct device *dev,
+                                           struct iommu_table *iommu,
+                                           unsigned long npages,
+                                           unsigned long *handle,
+                                           unsigned int pool_hash);
+
+extern void iommu_tbl_range_free(struct iommu_table *iommu,
+                                 u64 dma_addr, unsigned long npages,
+                                 bool do_demap, void *demap_arg);
+
+#endif