162306a36Sopenharmony_ci/* SPDX-License-Identifier: GPL-2.0 */ 262306a36Sopenharmony_ci#ifndef _LINUX_IOMMU_COMMON_H 362306a36Sopenharmony_ci#define _LINUX_IOMMU_COMMON_H 462306a36Sopenharmony_ci 562306a36Sopenharmony_ci#include <linux/spinlock_types.h> 662306a36Sopenharmony_ci#include <linux/device.h> 762306a36Sopenharmony_ci#include <asm/page.h> 862306a36Sopenharmony_ci 962306a36Sopenharmony_ci#define IOMMU_POOL_HASHBITS 4 1062306a36Sopenharmony_ci#define IOMMU_NR_POOLS (1 << IOMMU_POOL_HASHBITS) 1162306a36Sopenharmony_ci#define IOMMU_ERROR_CODE (~(unsigned long) 0) 1262306a36Sopenharmony_ci 1362306a36Sopenharmony_cistruct iommu_pool { 1462306a36Sopenharmony_ci unsigned long start; 1562306a36Sopenharmony_ci unsigned long end; 1662306a36Sopenharmony_ci unsigned long hint; 1762306a36Sopenharmony_ci spinlock_t lock; 1862306a36Sopenharmony_ci}; 1962306a36Sopenharmony_ci 2062306a36Sopenharmony_cistruct iommu_map_table { 2162306a36Sopenharmony_ci unsigned long table_map_base; 2262306a36Sopenharmony_ci unsigned long table_shift; 2362306a36Sopenharmony_ci unsigned long nr_pools; 2462306a36Sopenharmony_ci void (*lazy_flush)(struct iommu_map_table *); 2562306a36Sopenharmony_ci unsigned long poolsize; 2662306a36Sopenharmony_ci struct iommu_pool pools[IOMMU_NR_POOLS]; 2762306a36Sopenharmony_ci u32 flags; 2862306a36Sopenharmony_ci#define IOMMU_HAS_LARGE_POOL 0x00000001 2962306a36Sopenharmony_ci#define IOMMU_NO_SPAN_BOUND 0x00000002 3062306a36Sopenharmony_ci#define IOMMU_NEED_FLUSH 0x00000004 3162306a36Sopenharmony_ci struct iommu_pool large_pool; 3262306a36Sopenharmony_ci unsigned long *map; 3362306a36Sopenharmony_ci}; 3462306a36Sopenharmony_ci 3562306a36Sopenharmony_ciextern void iommu_tbl_pool_init(struct iommu_map_table *iommu, 3662306a36Sopenharmony_ci unsigned long num_entries, 3762306a36Sopenharmony_ci u32 table_shift, 3862306a36Sopenharmony_ci void (*lazy_flush)(struct iommu_map_table *), 3962306a36Sopenharmony_ci bool large_pool, u32 npools, 4062306a36Sopenharmony_ci bool skip_span_boundary_check); 4162306a36Sopenharmony_ci 4262306a36Sopenharmony_ciextern unsigned long iommu_tbl_range_alloc(struct device *dev, 4362306a36Sopenharmony_ci struct iommu_map_table *iommu, 4462306a36Sopenharmony_ci unsigned long npages, 4562306a36Sopenharmony_ci unsigned long *handle, 4662306a36Sopenharmony_ci unsigned long mask, 4762306a36Sopenharmony_ci unsigned int align_order); 4862306a36Sopenharmony_ci 4962306a36Sopenharmony_ciextern void iommu_tbl_range_free(struct iommu_map_table *iommu, 5062306a36Sopenharmony_ci u64 dma_addr, unsigned long npages, 5162306a36Sopenharmony_ci unsigned long entry); 5262306a36Sopenharmony_ci 5362306a36Sopenharmony_ci#endif 54