summaryrefslogtreecommitdiff
path: root/drivers/scsi/qla2xxx/qla_dsd.h
blob: 52e060f83b37d93832a3390c104fa3c720c669d8 (plain) (blame)
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
32
#ifndef _QLA_DSD_H_
#define _QLA_DSD_H_

#include <linux/unaligned.h>

/* 32-bit data segment descriptor (8 bytes) */
struct dsd32 {
	__le32 address;
	__le32 length;
};

static inline void append_dsd32(struct dsd32 **dsd, struct scatterlist *sg)
{
	put_unaligned_le32(sg_dma_address(sg), &(*dsd)->address);
	put_unaligned_le32(sg_dma_len(sg),     &(*dsd)->length);
	(*dsd)++;
}

/* 64-bit data segment descriptor (12 bytes) */
struct dsd64 {
	__le64 address;
	__le32 length;
} __packed;

static inline void append_dsd64(struct dsd64 **dsd, struct scatterlist *sg)
{
	put_unaligned_le64(sg_dma_address(sg), &(*dsd)->address);
	put_unaligned_le32(sg_dma_len(sg),     &(*dsd)->length);
	(*dsd)++;
}

#endif