linux/include/asm-arm/scatterlist.h
Russell King 7cdad48297 [ARM] Remove '__address' from scatterlist and convert to DMA API
The old __address element in struct scatterlist remained from older
kernels because the ARM DMA emulation code made use of it.  Move
this field into struct dma_struct, and convert DMA emulation code
to setup a SG entry as required.

Also, convert DMA emulation code to use the new DMA API rather
than the PCI DMA API.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-01-04 15:08:30 +00:00

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C

#ifndef _ASMARM_SCATTERLIST_H
#define _ASMARM_SCATTERLIST_H
#include <asm/memory.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 */
};
/*
* 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)
#endif /* _ASMARM_SCATTERLIST_H */