diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/iommu-common.h | 51 |
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 |