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53 lines
1.4 KiB
53 lines
1.4 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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#ifndef _LINUX_IOMMU_COMMON_H |
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#define _LINUX_IOMMU_COMMON_H |
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#include <linux/spinlock_types.h> |
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#include <linux/device.h> |
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#include <asm/page.h> |
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#define IOMMU_POOL_HASHBITS 4 |
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#define IOMMU_NR_POOLS (1 << IOMMU_POOL_HASHBITS) |
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#define IOMMU_ERROR_CODE (~(unsigned long) 0) |
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struct iommu_pool { |
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unsigned long start; |
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unsigned long end; |
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unsigned long hint; |
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spinlock_t lock; |
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}; |
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struct iommu_map_table { |
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unsigned long table_map_base; |
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unsigned long table_shift; |
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unsigned long nr_pools; |
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void (*lazy_flush)(struct iommu_map_table *); |
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unsigned long poolsize; |
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struct iommu_pool pools[IOMMU_NR_POOLS]; |
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u32 flags; |
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#define IOMMU_HAS_LARGE_POOL 0x00000001 |
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#define IOMMU_NO_SPAN_BOUND 0x00000002 |
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#define IOMMU_NEED_FLUSH 0x00000004 |
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struct iommu_pool large_pool; |
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unsigned long *map; |
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}; |
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extern void iommu_tbl_pool_init(struct iommu_map_table *iommu, |
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unsigned long num_entries, |
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u32 table_shift, |
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void (*lazy_flush)(struct iommu_map_table *), |
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bool large_pool, u32 npools, |
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bool skip_span_boundary_check); |
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extern unsigned long iommu_tbl_range_alloc(struct device *dev, |
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struct iommu_map_table *iommu, |
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unsigned long npages, |
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unsigned long *handle, |
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unsigned long mask, |
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unsigned int align_order); |
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extern void iommu_tbl_range_free(struct iommu_map_table *iommu, |
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u64 dma_addr, unsigned long npages, |
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unsigned long entry); |
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#endif
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