aac_build_sg64
ret = aac_build_sg64(cmd, &readcmd->sg);
ret = aac_build_sg64(cmd, &writecmd->sg);
ret = aac_build_sg64(cmd, (struct sgmap64 *) &srbcmd->sg);
static long aac_build_sg64(struct scsi_cmnd *scsicmd, struct sgmap64 *psg);