d618382ba5
The value returned from iommu_tbl_range_alloc() (and the one passed in as a fourth argument to iommu_tbl_range_free) is not a DMA address, it is rather an index into the IOMMU page table. Therefore using DMA_ERROR_CODE is not appropriate. Use a more type matching error code define, IOMMU_ERROR_CODE, and update all users of this interface. Reported-by: Andre Przywara <andre.przywara@arm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
52 lines
1.4 KiB
C
52 lines
1.4 KiB
C
#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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