27 lines
788 B
C
27 lines
788 B
C
|
#ifndef _ASMARM_SCATTERLIST_H
|
||
|
|
#define _ASMARM_SCATTERLIST_H
|
||
|
|
|
||
|
|
#include <asm/types.h>
|
||
|
|
|
||
|
|
struct scatterlist {
|
||
|
|
struct page *page; /* buffer page */
|
||
|
|
unsigned int offset; /* buffer offset */
|
||
|
|
dma_addr_t dma_address; /* dma address */
|
||
|
|
unsigned int length; /* length */
|
||
|
|
char *__address; /* for set_dma_addr */
|
||
|
|
};
|
||
|
|
|
||
|
|
/*
|
||
|
|
* These macros should be used after a pci_map_sg call has been done
|
||
|
|
* to get bus addresses of each of the SG entries and their lengths.
|
||
|
|
* You should only work with the number of sg entries pci_map_sg
|
||
|
|
* returns, or alternatively stop on the first sg_dma_len(sg) which
|
||
|
|
* is 0.
|
||
|
|
*/
|
||
|
|
#define sg_dma_address(sg) ((sg)->dma_address)
|
||
|
|
#define sg_dma_len(sg) ((sg)->length)
|
||
|
|
|
||
|
|
#define ISA_DMA_THRESHOLD (0xffffffff)
|
||
|
|
|
||
|
|
#endif /* _ASMARM_SCATTERLIST_H */
|