56 lines
1.4 KiB
C
56 lines
1.4 KiB
C
#ifndef _LINUX_IOMMU_COMMON_H
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#define _LINUX_IOMMU_COMMON_H
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#include <linux/spinlock_types.h>
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#include <linux/device.h>
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#include <asm/page.h>
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#define IOMMU_POOL_HASHBITS 4
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#define IOMMU_NR_POOLS (1 << IOMMU_POOL_HASHBITS)
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struct iommu_pool {
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unsigned long start;
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unsigned long end;
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unsigned long hint;
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spinlock_t lock;
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};
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struct iommu_table;
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struct iommu_tbl_ops {
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unsigned long (*cookie_to_index)(u64, void *);
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void (*demap)(void *, unsigned long, unsigned long);
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void (*reset)(struct iommu_table *);
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};
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struct iommu_table {
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unsigned long page_table_map_base;
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unsigned long page_table_shift;
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unsigned long nr_pools;
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const struct iommu_tbl_ops *iommu_tbl_ops;
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unsigned long poolsize;
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struct iommu_pool arena_pool[IOMMU_NR_POOLS];
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u32 flags;
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#define IOMMU_HAS_LARGE_POOL 0x00000001
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struct iommu_pool large_pool;
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unsigned long *map;
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};
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extern void iommu_tbl_pool_init(struct iommu_table *iommu,
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unsigned long num_entries,
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u32 page_table_shift,
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const struct iommu_tbl_ops *iommu_tbl_ops,
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bool large_pool, u32 npools);
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extern unsigned long iommu_tbl_range_alloc(struct device *dev,
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struct iommu_table *iommu,
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unsigned long npages,
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unsigned long *handle,
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unsigned int pool_hash);
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extern void iommu_tbl_range_free(struct iommu_table *iommu,
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u64 dma_addr, unsigned long npages,
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bool do_demap, void *demap_arg);
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#endif
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