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-rw-r--r--include/linux/iommu-common.h55
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