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frv: use asm-generic/scatterlist.h

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Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Cc: David Howells <dhowells@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
FUJITA Tomonori 2010-05-26 14:44:42 -07:00 committed by Linus Torvalds
parent 459d42b72c
commit 3e6e3da8d5
1 changed files with 1 additions and 39 deletions
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40
arch/frv/include/asm/scatterlist.h
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@ -1,45 +1,7 @@
#ifndef _ASM_SCATTERLIST_H
#define _ASM_SCATTERLIST_H
#include <asm/types.h>
/*
* Drivers must set either ->address or (preferred) page and ->offset
* to indicate where data must be transferred to/from.
*
* Using page is recommended since it handles highmem data as well as
* low mem. ->address is restricted to data which has a virtual mapping, and
* it will go away in the future. Updating to page can be automated very
* easily -- something like
*
* sg->address = some_ptr;
*
* can be rewritten as
*
* sg_set_buf(sg, some_ptr, length);
*
* and that's it. There's no excuse for not highmem enabling YOUR driver. /jens
*/
struct scatterlist {
#ifdef CONFIG_DEBUG_SG
unsigned long sg_magic;
#endif
unsigned long page_link;
unsigned int offset; /* for highmem, page offset */
dma_addr_t dma_address;
unsigned int 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)
#include <asm-generic/scatterlist.h>
#define ISA_DMA_THRESHOLD (0xffffffffUL)