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- /* SPDX-License-Identifier: GPL-2.0 */
- #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)
- #define IOMMU_ERROR_CODE (~(unsigned long) 0)
- 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
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