| /* 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 |
