xref: /OK3568_Linux_fs/kernel/drivers/scsi/qla2xxx/qla_dsd.h (revision 4882a59341e53eb6f0b4789bf948001014eff981) 
1*4882a593Smuzhiyun #ifndef _QLA_DSD_H_
2*4882a593Smuzhiyun #define _QLA_DSD_H_
3*4882a593Smuzhiyun 
4*4882a593Smuzhiyun #include <asm/unaligned.h>
5*4882a593Smuzhiyun 
6*4882a593Smuzhiyun /* 32-bit data segment descriptor (8 bytes) */
7*4882a593Smuzhiyun struct dsd32 {
8*4882a593Smuzhiyun 	__le32 address;
9*4882a593Smuzhiyun 	__le32 length;
10*4882a593Smuzhiyun };
11*4882a593Smuzhiyun 
append_dsd32(struct dsd32 ** dsd,struct scatterlist * sg)12*4882a593Smuzhiyun static inline void append_dsd32(struct dsd32 **dsd, struct scatterlist *sg)
13*4882a593Smuzhiyun {
14*4882a593Smuzhiyun 	put_unaligned_le32(sg_dma_address(sg), &(*dsd)->address);
15*4882a593Smuzhiyun 	put_unaligned_le32(sg_dma_len(sg),     &(*dsd)->length);
16*4882a593Smuzhiyun 	(*dsd)++;
17*4882a593Smuzhiyun }
18*4882a593Smuzhiyun 
19*4882a593Smuzhiyun /* 64-bit data segment descriptor (12 bytes) */
20*4882a593Smuzhiyun struct dsd64 {
21*4882a593Smuzhiyun 	__le64 address;
22*4882a593Smuzhiyun 	__le32 length;
23*4882a593Smuzhiyun } __packed;
24*4882a593Smuzhiyun 
append_dsd64(struct dsd64 ** dsd,struct scatterlist * sg)25*4882a593Smuzhiyun static inline void append_dsd64(struct dsd64 **dsd, struct scatterlist *sg)
26*4882a593Smuzhiyun {
27*4882a593Smuzhiyun 	put_unaligned_le64(sg_dma_address(sg), &(*dsd)->address);
28*4882a593Smuzhiyun 	put_unaligned_le32(sg_dma_len(sg),     &(*dsd)->length);
29*4882a593Smuzhiyun 	(*dsd)++;
30*4882a593Smuzhiyun }
31*4882a593Smuzhiyun 
32*4882a593Smuzhiyun #endif
33