| Greg Kroah-Hartman | b244131 | 2017-11-01 15:07:57 +0100 | [diff] [blame] | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| Sowmini Varadhan | ff7d37a | 2015-04-09 15:33:30 -0400 | [diff] [blame] | 2 | #ifndef _LINUX_IOMMU_COMMON_H |
| 3 | #define _LINUX_IOMMU_COMMON_H |
| 4 | |
| 5 | #include <linux/spinlock_types.h> |
| 6 | #include <linux/device.h> |
| 7 | #include <asm/page.h> |
| 8 | |
| 9 | #define IOMMU_POOL_HASHBITS 4 |
| 10 | #define IOMMU_NR_POOLS (1 << IOMMU_POOL_HASHBITS) |
| David S. Miller | d618382 | 2015-11-04 11:30:57 -0800 | [diff] [blame] | 11 | #define IOMMU_ERROR_CODE (~(unsigned long) 0) |
| Sowmini Varadhan | ff7d37a | 2015-04-09 15:33:30 -0400 | [diff] [blame] | 12 | |
| 13 | struct iommu_pool { |
| 14 | unsigned long start; |
| 15 | unsigned long end; |
| 16 | unsigned long hint; |
| 17 | spinlock_t lock; |
| 18 | }; |
| 19 | |
| 20 | struct iommu_map_table { |
| 21 | unsigned long table_map_base; |
| 22 | unsigned long table_shift; |
| 23 | unsigned long nr_pools; |
| 24 | void (*lazy_flush)(struct iommu_map_table *); |
| 25 | unsigned long poolsize; |
| 26 | struct iommu_pool pools[IOMMU_NR_POOLS]; |
| 27 | u32 flags; |
| 28 | #define IOMMU_HAS_LARGE_POOL 0x00000001 |
| 29 | #define IOMMU_NO_SPAN_BOUND 0x00000002 |
| 30 | #define IOMMU_NEED_FLUSH 0x00000004 |
| 31 | struct iommu_pool large_pool; |
| 32 | unsigned long *map; |
| 33 | }; |
| 34 | |
| 35 | extern void iommu_tbl_pool_init(struct iommu_map_table *iommu, |
| 36 | unsigned long num_entries, |
| 37 | u32 table_shift, |
| 38 | void (*lazy_flush)(struct iommu_map_table *), |
| 39 | bool large_pool, u32 npools, |
| 40 | bool skip_span_boundary_check); |
| 41 | |
| 42 | extern unsigned long iommu_tbl_range_alloc(struct device *dev, |
| 43 | struct iommu_map_table *iommu, |
| 44 | unsigned long npages, |
| 45 | unsigned long *handle, |
| 46 | unsigned long mask, |
| 47 | unsigned int align_order); |
| 48 | |
| 49 | extern void iommu_tbl_range_free(struct iommu_map_table *iommu, |
| 50 | u64 dma_addr, unsigned long npages, |
| 51 | unsigned long entry); |
| 52 | |
| 53 | #endif |