+extern void scsi_free_sgtable(struct scsi_cmnd *);
+
+extern int scsi_dma_map(struct scsi_cmnd *cmd);
+extern void scsi_dma_unmap(struct scsi_cmnd *cmd);
+
+#define scsi_sg_count(cmd) ((cmd)->use_sg)
+#define scsi_sglist(cmd) ((struct scatterlist *)(cmd)->request_buffer)
+#define scsi_bufflen(cmd) ((cmd)->request_bufflen)
+
+static inline void scsi_set_resid(struct scsi_cmnd *cmd, int resid)
+{
+ cmd->resid = resid;
+}
+
+static inline int scsi_get_resid(struct scsi_cmnd *cmd)
+{
+ return cmd->resid;
+}
+
+#define scsi_for_each_sg(cmd, sg, nseg, __i) \
+ for_each_sg(scsi_sglist(cmd), sg, nseg, __i)