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-rw-r--r--include/linux/iommu-common.h51
1 files changed, 51 insertions, 0 deletions
diff --git a/include/linux/iommu-common.h b/include/linux/iommu-common.h
new file mode 100644
index 000000000000..bbced83b32ee
--- /dev/null
+++ b/include/linux/iommu-common.h
@@ -0,0 +1,51 @@
+#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_map_table {
+ unsigned long table_map_base;
+ unsigned long table_shift;
+ unsigned long nr_pools;
+ void (*lazy_flush)(struct iommu_map_table *);
+ unsigned long poolsize;
+ struct iommu_pool pools[IOMMU_NR_POOLS];
+ u32 flags;
+#define IOMMU_HAS_LARGE_POOL 0x00000001
+#define IOMMU_NO_SPAN_BOUND 0x00000002
+#define IOMMU_NEED_FLUSH 0x00000004
+ struct iommu_pool large_pool;
+ unsigned long *map;
+};
+
+extern void iommu_tbl_pool_init(struct iommu_map_table *iommu,
+ unsigned long num_entries,
+ u32 table_shift,
+ void (*lazy_flush)(struct iommu_map_table *),
+ bool large_pool, u32 npools,
+ bool skip_span_boundary_check);
+
+extern unsigned long iommu_tbl_range_alloc(struct device *dev,
+ struct iommu_map_table *iommu,
+ unsigned long npages,
+ unsigned long *handle,
+ unsigned long mask,
+ unsigned int align_order);
+
+extern void iommu_tbl_range_free(struct iommu_map_table *iommu,
+ u64 dma_addr, unsigned long npages,
+ unsigned long entry);
+
+#endif