mirror of https://gitee.com/openkylin/linux.git
29 lines
782 B
C
29 lines
782 B
C
|
#ifndef _ASM_IA64_SCATTERLIST_H
|
||
|
|
#define _ASM_IA64_SCATTERLIST_H
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Modified 1998-1999, 2001-2002, 2004
|
||
|
|
* David Mosberger-Tang <davidm@hpl.hp.com>, Hewlett-Packard Co
|
||
|
|
*/
|
||
|
|
|
||
|
|
struct scatterlist {
|
||
|
|
struct page *page;
|
||
|
|
unsigned int offset;
|
||
|
|
unsigned int length; /* buffer length */
|
||
|
|
|
||
|
|
dma_addr_t dma_address;
|
||
|
|
unsigned int dma_length;
|
||
|
|
};
|
||
|
|
|
||
|
|
/*
|
||
|
|
* It used to be that ISA_DMA_THRESHOLD had something to do with the
|
||
|
|
* DMA-limits of ISA-devices. Nowadays, its only remaining use (apart
|
||
|
|
* from the aha1542.c driver, which isn't 64-bit clean anyhow) is to
|
||
|
|
* tell the block-layer (via BLK_BOUNCE_ISA) what the max. physical
|
||
|
|
* address of a page is that is allocated with GFP_DMA. On IA-64,
|
||
|
|
* that's 4GB - 1.
|
||
|
|
*/
|
||
|
|
#define ISA_DMA_THRESHOLD 0xffffffff
|
||
|
|
|
||
|
|
#endif /* _ASM_IA64_SCATTERLIST_H */
|