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
  11 struct iommu_pool {
  12         unsigned long   start;
  13         unsigned long   end;
  14         unsigned long   hint;
  15         spinlock_t      lock;
  16 };
  17
  18 struct iommu_map_table {
  19         unsigned long           table_map_base;
  20         unsigned long           table_shift;
  21         unsigned long           nr_pools;
  22         void                    (*lazy_flush)(struct iommu_map_table *);
  23         unsigned long           poolsize;
  24         struct iommu_pool       pools[IOMMU_NR_POOLS];
  25         u32                     flags;
  26 #define IOMMU_HAS_LARGE_POOL    0x00000001
  27 #define IOMMU_NO_SPAN_BOUND     0x00000002
  28 #define IOMMU_NEED_FLUSH        0x00000004
  29         struct iommu_pool       large_pool;
  30         unsigned long           *map;
  31 };
  32
  33 extern void iommu_tbl_pool_init(struct iommu_map_table *iommu,
  34                                 unsigned long num_entries,
  35                                 u32 table_shift,
  36                                 void (*lazy_flush)(struct iommu_map_table *),
  37                                 bool large_pool, u32 npools,
  38                                 bool skip_span_boundary_check);
  39
  40 extern unsigned long iommu_tbl_range_alloc(struct device *dev,
  41                                            struct iommu_map_table *iommu,
  42                                            unsigned long npages,
  43                                            unsigned long *handle,
  44                                            unsigned long mask,
  45                                            unsigned int align_order);
  46
  47 extern void iommu_tbl_range_free(struct iommu_map_table *iommu,
  48                                  u64 dma_addr, unsigned long npages,
  49                                  unsigned long entry);
  50
  51 #endif