/* 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