include/linux/iommu-common.h

   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