- * DIF DMA operation magic decoder ring.
- */
-void sd_dif_op(struct scsi_cmnd *scmd, unsigned int dif, unsigned int dix, unsigned int type)
-{
- int prot_op;
-
- prot_op = SCSI_PROT_NORMAL;
-
- BUG_ON(dif && (scmd->cmnd[0] == READ_6 || scmd->cmnd[0] == WRITE_6));
-
- switch (scmd->cmnd[0]) {
- case READ_6:
- case READ_10:
- case READ_12:
- case READ_16:
- if (dif && dix)
- prot_op = SCSI_PROT_READ_PASS;
- else if (dif && !dix)
- prot_op = SCSI_PROT_READ_STRIP;
- else if (!dif && dix)
- prot_op = SCSI_PROT_READ_INSERT;
-
- break;
-
- case WRITE_6:
- case WRITE_10:
- case WRITE_12:
- case WRITE_16:
- if (dif && dix)
- prot_op = SCSI_PROT_WRITE_PASS;
- else if (dif && !dix)
- prot_op = SCSI_PROT_WRITE_INSERT;
- else if (!dif && dix)
- prot_op = SCSI_PROT_WRITE_STRIP;
-
- break;
- }
-
- scsi_set_prot_op(scmd, prot_op);
- if (dif)
- scsi_set_prot_type(scmd, type);
-}
-
-/*