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Annotation of Examples/DriverKit/Adaptec1542B/Adaptec1542B_reloc.tproj/scsivar.h, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1992 NeXT Computer, Inc.
        !             3:  *
        !             4:  * Generic SCSI data structures.
        !             5:  *
        !             6:  * HISTORY
        !             7:  *
        !             8:  * 13 Apr  1993        Doug Mitchell
        !             9:  *     Standalone version for Loadable Adaptec driver.
        !            10:  *  6 July 1992 David E. Bohman at NeXT
        !            11:  *     Created from m68k version.
        !            12:  */
        !            13: 
        !            14: /* 
        !            15:  * SCSI bus constants used only by driver (not exported) 
        !            16:  */
        !            17:  
        !            18: /*
        !            19:  * message codes
        !            20:  */
        !            21: #define        MSG_CMDCMPLT            0x00    /* to host: command complete */
        !            22: #define        MSG_SAVEPTRS            0x02    /* to host: save data pointers */
        !            23: #define        MSG_RESTOREPTRS         0x03    /* to host: restore pointers */
        !            24: #define        MSG_DISCONNECT          0x04    /* to host: disconnect */
        !            25: #define        MSG_IDETERR             0x05    /* to disk: initiator detected error */
        !            26: #define        MSG_ABORT               0x06    /* to disk: abort op, go to bus free */
        !            27: #define        MSG_MSGREJECT           0x07    /* both ways: last msg unimplemented */
        !            28: #define        MSG_NOP                 0x08    /* to disk: no-op message */
        !            29: #define        MSG_MSGPARERR           0x09    /* to disk: parity error last message */
        !            30: #define        MSG_LNKCMDCMPLT         0x0a    /* to host: linked command complete */
        !            31: #define        MSG_LNKCMDCMPLTFLAG     0x0b    /* to host: flagged linked cmd cmplt */
        !            32: #define        MSG_DEVICERESET         0x0c    /* to disk: reset and go to bus free */
        !            33: 
        !            34: #define        MSG_IDENTIFYMASK        0x80    /* both ways: thread identification */
        !            35: #define        MSG_ID_DISCONN          0x40    /*      can disconnect/reconnect */
        !            36: #define        MSG_ID_LUNMASK          0x07    /*      target LUN */
        !            37: 
        !            38: /*
        !            39:  * opcode groups
        !            40:  */
        !            41: #define        SCSI_OPGROUP(opcode)    ((opcode) & 0xe0)
        !            42: 
        !            43: #define        OPGROUP_0               0x00    /* six byte commands */
        !            44: #define        OPGROUP_1               0x20    /* ten byte commands */
        !            45: #define        OPGROUP_2               0x40    /* ten byte commands */
        !            46: #define        OPGROUP_5               0xa0    /* twelve byte commands */
        !            47: #define        OPGROUP_6               0xc0    /* six byte, vendor unique commands */
        !            48: #define        OPGROUP_7               0xe0    /* ten byte, vendor unique commands */
        !            49: 
        !            50: /*
        !            51:  * scsi bus phases
        !            52:  */
        !            53: #define        PHASE_DATAOUT           0x0
        !            54: #define        PHASE_DATAIN            0x1
        !            55: #define        PHASE_COMMAND           0x2
        !            56: #define        PHASE_STATUS            0x3
        !            57: #define        PHASE_MSGOUT            0x6
        !            58: #define        PHASE_MSGIN             0x7
        !            59: 
        !            60: 

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