mscp_msg.h

<B>Digital的Unix操作系统VAX 4.2源码</B>

     */
    struct _cm {
	u_long	cmd_ref;			/* Command reference number  */
	u_short	unit;				/* Unit number		     */
	u_short		:16;			/* Reserved		     */
	u_char	opcode;				/* Opcode		     */
	u_char		:8;			/* Reserved		     */
	u_short	modifier;			/* Command modifiers	     */
	union {

	    /* Overlaid generic command message offsets
	     */
	    struct _gen_cm {
		u_long	byte_cnt;		/* Byte count		     */
		u_long	buffer[ 3 ];		/* Buffer descriptor	     */
		u_long	lbn;			/* Logical block number	     */
	    } gen;

	    /* ABORT and GET COMMAND STATUS command message offsets
	     */
	    struct _abo_cm {			/* Command offsets for ABORT */
		u_long	out_ref;		/* Outstanding reference no. */
	    } abo;

	    /* ACCESS NON-VOLATILE MEMORY command message offsets
	     */
	    struct _anm_cm {
		u_long		:32;		/* Reserved		     */
		u_long	anm_offs;		/* Offset in NVM	     */
		u_short	anm_oper;		/* Operation (see A-12)	     */
		u_short	anm_dlgh;		/* Data length		     */
		u_char	anm_memd[ 4 ];		/* NVM data (variable)	     */
	    } anm;

	    /* ONLINE and SET UNIT CHARACTERISTICS command message offsets
	     */
	    struct _onl_cm {
		u_short		:16;		/* Reserved		     */
		u_short	unt_flgs;		/* Unit flags		     */
		u_long		:32;		/* Reserved		     */
		union {
		    struct {			/* Disk variant		     */
			u_long	excl_lba;	/* Excluded LBN address	     */
			u_long	excl_lbc;	/* Excluded LBN count	     */
			u_long	dev_parm;	/* Device parameters	     */
			u_short	shdw_unt;	/* Shadow unit number	     */
			u_short	copy_mod;	/* Copy mode		     */
		    } d;
		    struct {			/* Tape variant		     */
			u_long		:32;	/* Reserved		     */
			u_long		:32;	/* Reserved		     */
			u_long	dev_parm;	/* Device parameters	     */
			u_short	format;		/* Format		     */
			u_short	speed;		/* Speed		     */
		    } t;
		} u1;
	    } onl;

	    /* REPOSITION command message offsets
	     */
	    struct _rpo_cm {
		u_long	rec_cnt;		/* Record count/object count */
		u_long	tmgp_cnt;		/* Tape mark count	     */
	    } rpo;

	    /* REPLACE command message offsets
	     */
	    struct _rep_cm {
		u_long	rbn;			/* Replacement block number  */
	    } rep;

	    /* set controller characteristics command message offsets
	     */
	    struct _scc_cm {
		u_short	version;		/* MSCP version		     */
		u_short	cnt_flgs;		/* Controller flags	     */
		u_short	hst_tmo;		/* Host timeout		     */
		u_short		:16;		/* Reserved		     */
		u_long	time[ 2 ];		/* Quadword date/time	     */
		u_long	cnt_parm;		/* Cnt-dependent parameters  */
	    } scc;

	    /* FORMAT command message offsets
	     */
	    struct _fmt_cm {
		u_long	byte_cnt;		/* Byte count		     */
		u_long	buffer[ 3 ];		/* Buffer descriptor	     */
		u_long	fmt_func;		/* Format function code	     */
	    } fmt;

	    /* DISPLAY command message offsets
	     */
	    struct _dpy_cm {
		u_short	ditem;			/* Item code		     */
		u_short	dmode;			/* Mode			     */
		u_char	dtext[ 16 ];		/* Display text		     */
	    } dpy;
	} u0;
    } cm; 

    /* Generic end message offsets
     */
    struct _em {
	u_long	cmd_ref;			/* Command reference number  */
	u_short	unit;				/* Unit number		     */
	u_short	seq_num;			/* Last err log sequence num */
	u_char	endcode;			/* Endcode		     */
	u_char	flags;				/* End message flags	     */
	u_short	status;				/* Status		     */
	union {

	    /* Overlaid generic end message offsets
	     */
	    struct _gen_em {
		u_long	byte_cnt;		/* Byte count		     */
		u_long		:32;		/* Reserved		     */
		u_long		:32;		/* Reserved		     */
		u_long		:32;		/* Reserved		     */
		u_long	frst_bad;		/* First bad block	     */
	    } gen;

	    /* ABORT and GET COMMAND STATUS end message offsets
	     */
	    struct _abo_em {
		u_long	out_ref;		/* Outstanding reference no. */
		u_long	cmd_sts;		/* Command status	     */
	    } abo;

	    /* ACCESS NON-VOLATILE MEMORY end message offsets
	     */
	    struct _anm_em {
		u_long	anm_size;		/* NVM size		     */
		u_long	anm_offs;		/* Offset in NVM	     */
		u_short	anm_oper;		/* Operation (see A-12)	     */
		u_short	anm_dlgh;		/* Data length		     */
		u_long	anm_memd;		/* NVM data (variable)	     */
	    } anm;			

	    /* GET UNIT STATUS end message offsets
	     */
	    struct _gus_em {
		u_short	mult_unt;		/* Multi-unit code	     */
		u_short	unt_flgs;		/* Unit flags		     */
		u_long		:32;		/* Reserved		     */
		u_long	unit_id[ 2 ];		/* Unit identifier	     */
		u_long	media_id;		/* Media identifier	     */
		union {
		    struct {
			u_short	shdw_unt;	/* Shadow unit		     */
			u_short	shdw_sts;	/* Shadow status	     */
			u_short	track;		/* Track size		     */
			u_short	group;		/* Group size		     */
			u_short	cylinder;	/* Cylinder size	     */
			u_char	unit_svr;	/* Unit software version */
			u_char	unit_hvr;	/* Unit hardware version */
			u_short	rct_size;	/* RCT table size	     */
			u_char	rbns;		/* RBNs per track	     */
			u_char	rct_cpys;	/* RCT copies		     */
		    } d;
		    struct {
			u_short format;		/* Density in bpi	     */
			u_short speed;		/* Instantaneous data rate   */
			u_short formenu;	/* Format menu		     */
			u_char	freecap;	/* Free capacity	     */
			u_char		:8;	/* Reserved		     */
			u_char	fmtr_svr;	/* Formater software version */
			u_char	fmtr_hvr;	/* Formater hardware version */
			u_char	unit_svr;	/* Unit software version */
			u_char	unit_hvr;	/* Unit hardware version */
		    } t;
		} u1;
	    } gus;

	    /* ONLINE and SET UNIT CHARACTERISTICS end message and
	     * AVAILABLE attention message offsets.
	     */
	    struct _onl_em {
		u_short	mult_unt;		/* Multi-unit code	     */
		u_short	unt_flgs;		/* Unit flags		     */
		u_long		:32;		/* Reserved		     */
		u_long	unit_id[ 2 ];		/* Unit identifier	     */
		u_long	media_id;		/* Media identifier	     */
		union {
		    struct {
			u_short	shdw_unt;	/* Shadow unit		     */
			u_short	shdw_sts;	/* Shadow status	     */
			u_long	unt_size;	/* Unit size		     */
			u_long	vol_ser;	/* Volume serial number	     */
		    } d;
		    struct {
			u_short format;		/* Density in bpi	     */
			u_short speed;		/* Instantaneous data rate   */
			u_long  maxwtrec;	/* Max write byte count      */
			u_short noiserec;	/* Max noise record size     */
			u_short		:16;	/* Reserved		     */
		    } t;
		} u1;
	    } onl;

	    /* SET CONTROLLER CHARACTERISTICS end message offsets.
	     */
	    struct _scc_em {
		u_short	version;		/* MSCP version		     */
		u_short	cnt_flgs;		/* Controller flags	     */
		u_short	cnt_tmo;		/* Controller timeout	     */
		u_char	cnt_svr;		/* Ctrlr software version    */
		u_char	cnt_hvr;		/* Ctrlr hardware version    */
		u_long	cnt_id[ 2 ];		/* Controller ID	     */
		u_long	max_bcnt;		/* Ctrlr maximum byte count  */
	    } scc;

	    /* Tape ACCESS, COMPARE HOST DATA, FLUSH, READ,
	     * WRITE and WRITE TAPE MARK end message offsets.
	     */
	    struct _acc_em {
                u_long  byte_cnt;		/* Host transfer             */
		u_long		:32;		/* Reserved		     */
		u_long		:32;		/* Reserved		     */
		u_long		:32;		/* Reserved		     */
                u_long  position;		/* Object count              */
                u_long  taperec;		/* Tape record byte count    */
	    } acc;

	    /* REPOSITION end message offsets.
	     */
	    struct _rpo_em {
		u_long  rcskiped;		/* Records skipped/undefined */
		u_long  tmskiped;		/* Tape marks skipped/undef  */
		u_long		:32;		/* Reserved		     */
		u_long		:32;		/* Reserved		     */
		u_long	position;		/* Object count 	     */
	    } rpo;
	} u0;
    } em;
} MSCP;

typedef struct _cm	MSCP_CMDMSG;
typedef struct _em	MSCP_ENDMSG;


/* Redefine cells inside inner unions and structures to eliminate
 * multiple qualification levels.
 */
#define	mscp_anm_offs	cm.u0.anm.anm_offs	/* Offset in NVM	     */
#define	mscp_anm_oper	cm.u0.anm.anm_oper	/* Operation (see A-12)	     */
#define	mscp_anm_dlgh	cm.u0.anm.anm_dlgh	/* Data length		     */
#define	mscp_anm_memd	cm.u0.anm.anm_memd	/* NVM data		     */
#define mscp_anm_size	em.u0.anm.anm_size	/* NVM size		     */
#define mscp_buffer	cm.u0.gen.buffer	/* Buffer descriptor	     */
#define mscp_byte_cnt	cm.u0.gen.byte_cnt	/* Byte count		     */
#define mscp_cmd_ref	cm.cmd_ref		/* Command reference number  */
#define mscp_cmd_sts	em.u0.abo.cmd_sts	/* Command status	     */
#define mscp_cnt_flgs	cm.u0.scc.cnt_flgs	/* Controller flags	     */
#define mscp_cnt_hvr	em.u0.scc.cnt_hvr	/* Hardware version	     */
#define mscp_cnt_id	em.u0.scc.cnt_id	/* Controller ID	     */
#define mscp_cnt_parm	cm.u0.scc.cnt_parm	/* Ctlr-dependent parms	     */
#define mscp_cnt_svr	em.u0.scc.cnt_svr	/* Software version	     */
#define mscp_cnt_tmo	em.u0.scc.cnt_tmo	/* Controller timeout	     */
#define mscp_copy_mod	cm.u0.onl.u1.d.copy_mod	/* Copy mode		     */
#define mscp_cylinder	em.u0.gus.u1.d.cylinder	/* Cylinder size	     */
#define mscp_dev_parm	cm.u0.onl.u1.d.dev_parm	/* Device parameters	     */
#define mscp_ditem	cm.u0.dpy.ditem		/* Item code		     */
#define mscp_dmode	cm.u0.dpy.dmode		/* Mode			     */
#define mscp_dtext	cm.u0.dpy.dtext		/* Display text		     */
#define mscp_endcode	em.endcode		/* Endcode aka opcode	     */
#define mscp_excl_lba	cm.u0.onl.u1.d.excl_lba	/* Excluded LBN address	     */
#define mscp_excl_lbc	cm.u0.onl.u1.d.excl_lbc	/* Excluded LBN count	     */
#define mscp_flags	em.flags		/* End message flags	     */
#define mscp_fmtr_hvr	em.u0.gus.u1.t.fmtr_hvr	/* Formatter h/w version     */
#define mscp_fmtr_svr	em.u0.gus.u1.t.fmtr_svr	/* Formatter s/w version     */
#define mscp_fmt_func	cm.u0.fmt.fmt_func	/* Format disk function code */
#define mscp_format	cm.u0.onl.u1.t.format	/* Tape format		     */