blob: 9dbea8844d5ea11e003d81f339fda7c2f40edf9e (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
|
#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
#define sg_dma_len(sg) ((sg)->dma_length)
#define sg_dma_address(sg) ((sg)->dma_address)
#endif /* _ASM_IA64_SCATTERLIST_H */
|
