Viewing file:  iommu-common.h (1.41 KB) -rw-r--r--
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/* 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
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