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Commit 1648993f authored by Joerg Roedel's avatar Joerg Roedel Committed by Linus Torvalds
Browse files

introduce generic header file for the software IO/TLB 



A series of patches introduce a generic header file for the software
IO/TLB implementation in lib/swiotlb.c.  Currently each architecture using
this code defines the prototypes itself.  The prototypes are moved to
include/linux/swiotlb.h and this file is included in architecture specific
code for X86 and IA64.

This patch:

Create include/linux/swiotlb.h file which contains all function prototypes
for the lib/swiotlb.c file.

(akpm: the dependent patches will be trickled through arch trees)

Signed-off-by: default avatarJoerg Roedel <joerg.roedel@amd.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: "Luck, Tony" <tony.luck@intel.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 459fc208

include/linux/swiotlb.h

0 → 100644
+83 −0
Original line number Diff line number Diff line 
#ifndef __LINUX_SWIOTLB_H

#define __LINUX_SWIOTLB_H



#include <linux/types.h>



struct device;

struct dma_attrs;

struct scatterlist;



extern void

swiotlb_init(void);



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_single(struct device *hwdev, void *ptr, size_t size, int dir);



extern void

swiotlb_unmap_single(struct device *hwdev, dma_addr_t dev_addr,

		     size_t size, int dir);



extern dma_addr_t

swiotlb_map_single_attrs(struct device *hwdev, void *ptr, size_t size,

			 int dir, struct dma_attrs *attrs);



extern void

swiotlb_unmap_single_attrs(struct device *hwdev, dma_addr_t dev_addr,

			   size_t size, int dir, struct dma_attrs *attrs);



extern int

swiotlb_map_sg(struct device *hwdev, struct scatterlist *sg, int nents,

	       int direction);



extern void

swiotlb_unmap_sg(struct device *hwdev, struct scatterlist *sg, int nents,

		 int direction);



extern int

swiotlb_map_sg_attrs(struct device *hwdev, struct scatterlist *sgl, int nelems,

		     int dir, struct dma_attrs *attrs);



extern void

swiotlb_unmap_sg_attrs(struct device *hwdev, struct scatterlist *sgl,

		       int nelems, int dir, struct dma_attrs *attrs);



extern void

swiotlb_sync_single_for_cpu(struct device *hwdev, dma_addr_t dev_addr,

			    size_t size, int dir);



extern void

swiotlb_sync_sg_for_cpu(struct device *hwdev, struct scatterlist *sg,

			int nelems, int dir);



extern void

swiotlb_sync_single_for_device(struct device *hwdev, dma_addr_t dev_addr,

			       size_t size, int dir);



extern void

swiotlb_sync_sg_for_device(struct device *hwdev, struct scatterlist *sg,

			   int nelems, int dir);



extern void

swiotlb_sync_single_range_for_cpu(struct device *hwdev, dma_addr_t dev_addr,

				  unsigned long offset, size_t size, int dir);



extern void

swiotlb_sync_single_range_for_device(struct device *hwdev, dma_addr_t dev_addr,

				     unsigned long offset, size_t size,

				     int 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);



#endif /* __LINUX_SWIOTLB_H */