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Linux/include/linux/iommu-common.h

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  1 #ifndef _LINUX_IOMMU_COMMON_H
  2 #define _LINUX_IOMMU_COMMON_H
  3 
  4 #include <linux/spinlock_types.h>
  5 #include <linux/device.h>
  6 #include <asm/page.h>
  7 
  8 #define IOMMU_POOL_HASHBITS     4
  9 #define IOMMU_NR_POOLS          (1 << IOMMU_POOL_HASHBITS)
 10 #define IOMMU_ERROR_CODE        (~(unsigned long) 0)
 11 
 12 struct iommu_pool {
 13         unsigned long   start;
 14         unsigned long   end;
 15         unsigned long   hint;
 16         spinlock_t      lock;
 17 };
 18 
 19 struct iommu_map_table {
 20         unsigned long           table_map_base;
 21         unsigned long           table_shift;
 22         unsigned long           nr_pools;
 23         void                    (*lazy_flush)(struct iommu_map_table *);
 24         unsigned long           poolsize;
 25         struct iommu_pool       pools[IOMMU_NR_POOLS];
 26         u32                     flags;
 27 #define IOMMU_HAS_LARGE_POOL    0x00000001
 28 #define IOMMU_NO_SPAN_BOUND     0x00000002
 29 #define IOMMU_NEED_FLUSH        0x00000004
 30         struct iommu_pool       large_pool;
 31         unsigned long           *map;
 32 };
 33 
 34 extern void iommu_tbl_pool_init(struct iommu_map_table *iommu,
 35                                 unsigned long num_entries,
 36                                 u32 table_shift,
 37                                 void (*lazy_flush)(struct iommu_map_table *),
 38                                 bool large_pool, u32 npools,
 39                                 bool skip_span_boundary_check);
 40 
 41 extern unsigned long iommu_tbl_range_alloc(struct device *dev,
 42                                            struct iommu_map_table *iommu,
 43                                            unsigned long npages,
 44                                            unsigned long *handle,
 45                                            unsigned long mask,
 46                                            unsigned int align_order);
 47 
 48 extern void iommu_tbl_range_free(struct iommu_map_table *iommu,
 49                                  u64 dma_addr, unsigned long npages,
 50                                  unsigned long entry);
 51 
 52 #endif
 53 

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