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Annotation of Examples/DriverKit/Adaptec1542B/Adaptec1542B_reloc.tproj/scsivar.h, revision 1.1.1.1

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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