GCMDP2GTGTP
#define GCMD2TGT(gcmdp) GTGTP2ATATGTP(GCMDP2GTGTP(gcmdp))
#define GCMD2DRV(gcmdp) GTGTP2ATADRVP(GCMDP2GTGTP(gcmdp))
#define GCMDP2CCCP(gcmdp) (GCMDP2GTGTP(gcmdp)->gt_ccc)
gtgt_t *gtgtp = GCMDP2GTGTP(gcmdp);