Eric Lee / smarc-fsl-linux-kernel

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include/linux/iommu-common.h 1.41 KB
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b24413180   Greg Kroah-Hartman   License cleanup: ... 
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  /* SPDX-License-Identifier: GPL-2.0 */
ff7d37a50   Sowmini Varadhan   Break up monolith... 
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  #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)
d618382ba   David S. Miller   iommu-common: Fix... 
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  #define IOMMU_ERROR_CODE	(~(unsigned long) 0)
ff7d37a50   Sowmini Varadhan   Break up monolith... 
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  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