scsi/qla2xxx/qla_dsd.h

0001 #ifndef _QLA_DSD_H_
0002 #define _QLA_DSD_H_
0003
0004 #include <asm/unaligned.h>
0005
0006 /* 32-bit data segment descriptor (8 bytes) */
0007 struct dsd32 {
0008     __le32 address;
0009     __le32 length;
0010 };
0011
0012 static inline void append_dsd32(struct dsd32 **dsd, struct scatterlist *sg)
0013 {
0014     put_unaligned_le32(sg_dma_address(sg), &(*dsd)->address);
0015     put_unaligned_le32(sg_dma_len(sg),     &(*dsd)->length);
0016     (*dsd)++;
0017 }
0018
0019 /* 64-bit data segment descriptor (12 bytes) */
0020 struct dsd64 {
0021     __le64 address;
0022     __le32 length;
0023 } __packed;
0024
0025 static inline void append_dsd64(struct dsd64 **dsd, struct scatterlist *sg)
0026 {
0027     put_unaligned_le64(sg_dma_address(sg), &(*dsd)->address);
0028     put_unaligned_le32(sg_dma_len(sg),     &(*dsd)->length);
0029     (*dsd)++;
0030 }
0031
0032 #endif