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Release 4.12 include/linux/swiotlb.h

Directory: include/linux
#ifndef __LINUX_SWIOTLB_H

#define __LINUX_SWIOTLB_H

#include <linux/dma-direction.h>
#include <linux/init.h>
#include <linux/types.h>

struct device;
struct page;
struct scatterlist;


enum swiotlb_force {
	
SWIOTLB_NORMAL,		/* Default - depending on HW DMA mask etc. */
	
SWIOTLB_FORCE,		/* swiotlb=force */
	
SWIOTLB_NO_FORCE,	/* swiotlb=noforce */
};

extern enum swiotlb_force swiotlb_force;

/*
 * Maximum allowable number of contiguous slabs to map,
 * must be a power of 2.  What is the appropriate value ?
 * The complexity of {map,unmap}_single is linearly dependent on this value.
 */

#define IO_TLB_SEGSIZE	128

/*
 * log of the size of each IO TLB slab.  The number of slabs is command line
 * controllable.
 */

#define IO_TLB_SHIFT 11

extern void swiotlb_init(int verbose);
int swiotlb_init_with_tbl(char *tlb, unsigned long nslabs, int verbose);
extern unsigned long swiotlb_nr_tbl(void);
unsigned long swiotlb_size_or_default(void);
extern int swiotlb_late_init_with_tbl(char *tlb, unsigned long nslabs);

/*
 * Enumeration for sync targets
 */

enum dma_sync_target {
	
SYNC_FOR_CPU = 0,
	
SYNC_FOR_DEVICE = 1,
};

/* define the last possible byte of physical address space as a mapping error */

#define SWIOTLB_MAP_ERROR (~(phys_addr_t)0x0)

extern phys_addr_t swiotlb_tbl_map_single(struct device *hwdev,
					  dma_addr_t tbl_dma_addr,
					  phys_addr_t phys, size_t size,
					  enum dma_data_direction dir,
					  unsigned long attrs);

extern void swiotlb_tbl_unmap_single(struct device *hwdev,
				     phys_addr_t tlb_addr,
				     size_t size, enum dma_data_direction dir,
				     unsigned long attrs);

extern void swiotlb_tbl_sync_single(struct device *hwdev,
				    phys_addr_t tlb_addr,
				    size_t size, enum dma_data_direction dir,
				    enum dma_sync_target target);

/* Accessory functions. */
extern void
*swiotlb_alloc_coherent(struct device *hwdev, size_t size,
			dma_addr_t *dma_handle, gfp_t flags);

extern void
swiotlb_free_coherent(struct device *hwdev, size_t size,
		      void *vaddr, dma_addr_t dma_handle);

extern dma_addr_t swiotlb_map_page(struct device *dev, struct page *page,
				   unsigned long offset, size_t size,
				   enum dma_data_direction dir,
				   unsigned long attrs);
extern void swiotlb_unmap_page(struct device *hwdev, dma_addr_t dev_addr,
			       size_t size, enum dma_data_direction dir,
			       unsigned long attrs);

extern int
swiotlb_map_sg_attrs(struct device *hwdev, struct scatterlist *sgl, int nelems,
		     enum dma_data_direction dir,
		     unsigned long attrs);

extern void
swiotlb_unmap_sg_attrs(struct device *hwdev, struct scatterlist *sgl,
		       int nelems, enum dma_data_direction dir,
		       unsigned long attrs);

extern void
swiotlb_sync_single_for_cpu(struct device *hwdev, dma_addr_t dev_addr,
			    size_t size, enum dma_data_direction dir);

extern void
swiotlb_sync_sg_for_cpu(struct device *hwdev, struct scatterlist *sg,
			int nelems, enum dma_data_direction dir);

extern void
swiotlb_sync_single_for_device(struct device *hwdev, dma_addr_t dev_addr,
			       size_t size, enum dma_data_direction dir);

extern void
swiotlb_sync_sg_for_device(struct device *hwdev, struct scatterlist *sg,
			   int nelems, enum dma_data_direction dir);

extern int
swiotlb_dma_mapping_error(struct device *hwdev, dma_addr_t dma_addr);

extern int
swiotlb_dma_supported(struct device *hwdev, u64 mask);

#ifdef CONFIG_SWIOTLB
extern void __init swiotlb_free(void);
unsigned int swiotlb_max_segment(void);
#else

static inline void swiotlb_free(void) { }

Contributors

PersonTokensPropCommitsCommitProp
FUJITA Tomonori8100.00%1100.00%
Total8100.00%1100.00%


static inline unsigned int swiotlb_max_segment(void) { return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Konrad Rzeszutek Wilk13100.00%1100.00%
Total13100.00%1100.00%

#endif extern void swiotlb_print_info(void); extern int is_swiotlb_buffer(phys_addr_t paddr); extern void swiotlb_set_max_segment(unsigned int); #endif /* __LINUX_SWIOTLB_H */

Overall Contributors

PersonTokensPropCommitsCommitProp
Joerg Roedel24747.14%14.17%
Konrad Rzeszutek Wilk12022.90%416.67%
FUJITA Tomonori8015.27%729.17%
Alexander Duyck183.44%416.67%
Geert Uytterhoeven163.05%28.33%
Ian Campbell101.91%14.17%
Thierry Reding91.72%14.17%
Yinghai Lu81.53%28.33%
Krzysztof Kozlowski81.53%14.17%
Akinobu Mita81.53%14.17%
Total524100.00%24100.00%
Directory: include/linux
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