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