NAME       : HCPSZREQ
 DESCRIPTION: SCSI Strategy Call Request Block
 DSECT      : SZREQ
 FUNCTION   :
 LOCATED BY :
 CREATED BY :
 DELETED BY :
 SERIALIZED :
 RELOCATION CONSIDERATIONS : None
 NOTES      :
              This DSECT is a mapping of the blkioReq_iosct structure.
              It must match exactly, including offsets up to SZREQEND.
              CAUTION: The XLC compiler aligns all LONG
              definitions on 64 bit boundaries.  Care must be
              taken to account for the alignment in this DSECT.
              This is a variable length block.  It may or may not
              contain a 512-byte temp buffer.
              HLA = Host Logical Address
              HAA = Host Absolute Address

 SZREQ DSECT
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Hex   Dec Type/Val   Lng Label (dup)    Comments
---- ---- --------- ---- -------------- --------
0000    0 Structure      SZREQ          SCSI Strategy Call Request Block
0000    0 Bitstring    1 SZRFLGU (6)    Unused flag bytes
0006    6 Bitstring    1 SZRFLGEX       Extended Status flags
          .... ...1      SZRBASYN       X'01' SZRBASYN Don't wait for I/O
                                        completion
          ...1 ....      SZRBMORE       X'10' SZRBMORE More buffers to be
                                        processed
          .1.. ....      SZRBPROT       X'40' SZRBPROT Protection
                                        violation
          1... ....      SZRBSPLT       X'80' SZRBSPLT Enable split
                                        read/write
0007    7 Bitstring    1 SZRFLGST       Status flags
          .... ....      SZRBWRIT       X'00' SZRBWRIT Non-read flag
          .... ...1      SZRBREAD       X'01' SZRBREAD Read when I/O
                                        occurs
          .... ..1.      SZRBDONE       X'02' SZRBDONE I/O complete
          .... .1..      SZRBERR        X'04' SZRBERR Error detected
          .... 1...      SZRBBUSY       X'08' SZRBBUSY I/O in progress
0008    8 Address      8 *              Reserved for SCSI Container use
0010   16 Address      8 *              Reserved for SCSI Container use
0018   24 Address      8 SZRFORW (0)    64-bit HLA(next SZREQ) CP only
                                        uses 31-bit HLA in SZRFORWL
0018   24 Address      4 SZRFORWH       High word of SZRFORW
001C   28 Address      4 SZRFORWL       Low word of SZRFORW
0020   32 Address      8 *              Reserved for SCSI Container use
0028   40 Address      8 *              Reserved for SCSI Container use
0030   48 Address      8 *              Reserved for SCSI Container use
0038   56 Address      8 *              Reserved for SCSI Container use
0040   64 Dbl-Word     8 SZRBLKNO (0)   Block number on device CP only
                                        uses 32-bit block numbers
0040   64 Signed       4 SZRBLKNH       High word of SZRBLKNO
0044   68 Signed       4 SZRBLKNL       Low word of SZRBLKNO
0048   72 Address      8 SZRBUFRA (0)   64-bit HAA(Data buffer)
0048   72 Address      4 SZRBUFRH       High word of SZRBUFRA
004C   76 Address      4 SZRBUFRL       Low word of SZRBUFRA
0050   80 Dbl-Word     8 SZRBCNT (0)    Transfer count in bytes CP only
                                        uses 32-bit byte counts
0050   80 Signed       4 SZRBCNTH       High word of SZRBCNT
0054   84 Signed       4 SZRBCNTL       Low word of SZRBCNT
0058   88 Dbl-Word     8 SZRRESID (0)   Bytes not transfered after error
                                        CP only uses 32-bit byte counts
0058   88 Signed       4 SZRRSIDH       High word of SZRRESID
005C   92 Signed       4 SZRRSIDL       Low word of SZRRESID
0060   96 Dbl-Word     8 *              Reserved for SCSI Container use
0068  104 Signed       4 *              Reserved for SCSI Container use
006C  108 Bitstring    1 SZRERROR       Error indicator returned after
                                        I/O
          .... ...1      SZREPERM       1 SZREPERM Operation not
                                        permitted
          .... ..1.      SZRENOEN       2 SZRENOEN Operation not
                                        permitted
          .... .1.1      SZREIO         5 SZREIO I/O error
          .... .11.      SZRENXIO       6 SZRENXIO No such device or
                                        address
          .... 1.11      SZREAGAI       11 SZREAGAI Resource temporarily
                                        unavailable
          .... 11..      SZRENOME       12 SZRENOME Not enough space
          .... 11.1      SZREACCE       13 SZREACCE Permission denied
          .... 111.      SZREFAUL       14 SZREFAUL Bad address
          ...1 ....      SZREBUSY       16 SZREBUSY Resource busy
          ...1 ...1      SZREEXIS       17 SZREEXIS File exists
          ...1 ..11      SZRENODE       19 SZRENODE No such device
          ...1 .11.      SZREINVA       22 SZREINVA Invalid argument
          ..1. ..1.      SZRERANG       34 SZRERANG Result too large
          ..1. 1.1.      SZREUNAT       42 SZREUNAT Protocol driver not
                                        attached
          ..1. 111.      SZRENOTR       46 SZRENOTR Device not ready
          ..1. 1111      SZREWRPR       47 SZREWRPR Write-protected media
          ..11 ....      SZREFORM       48 SZREFORM Unformatted media
          ..11 ...1      SZRENOLC       49 SZRENOLC No locks available
          ..11 ..1.      SZRENOCO       50 SZRENOCO No connection
          ..11 .1..      SZRESTAL       52 SZRESTAL No filesystem
          ..11 .111      SZREINPR       55 SZREINPR Operation now in
                                        progress
          .1.. .1.1      SZRENETD       69 SZRENETD Network is down
          .1.. .11.      SZRENETU       70 SZRENETU Network is
                                        unreachable
          .1.. 111.      SZRETIME       78 SZRETIME Connection timed out
          .1.. 1111      SZRECONN       79 SZRECONN Connection refused
          .11. 111.      SZREMEDI       110 SZREMEDI Media surface error
          .11. 1111      SZRESOFT       111 SZRESOFT I/O completed, but
                                        needs relocation
          .111 .1..      SZREDEAD       116 SZREDEAD Dead Link (FAStT)
          1... ...1      SZREPURG       129 SZREPURG I/O purged
006D  109 Bitstring    1 * (3)          Padding to match header compile
0070  112 Bitstring    1 * (32)         Reserved for SCSI Container use
0090  144 Bitstring    1 * (8)          Reserved for SCSI Container use
0098  152 Bitstring    1 * (4)          Reserved for SCSI Container use
009C  156 Bitstring    1 * (4)          Padding to match header compile
             **********************************************------
             * struct xmem definition
             *
             * Structure to hold virtual to real mappings
             * for pre-translated cross memory descriptors
             **********************************************------
00A0  160 Bitstring   32 SZRXMEM (0)    xmem descriptor for data buffer
00A0  160 Signed       4 SZRXASI        Address space identifier
          00FFFF9C       SZRXVMTP       -100 SZRXVMTP VM TYPE (xmem
                                        contains real addrs)
00A4  164 Signed       4 SZRXFLG        control flags Start of imbedded
                                        V2R mapping structure (xmem_ct)
00A8  168 Signed       4 SZRXTOT        length of RPN array (total
                                        elements)
00AC  172 Signed       4 SZRXUSD        number of rpn elements used
00B0  176 Dbl-Word     8 SZRXVPN        virtual page number
00B8  184 Address      8 SZRXRPN (0)    HLA(array of real page numbers)
00B8  184 Address      4 SZRXRPNH       High word of SZRXRPN
00BC  188 Address      4 SZRXRPNL       Low word of SZRXRPN
00C0  192 Bitstring    8 *              Reserved for SCSI Container use
00C8  200 Address      8 SZRBEXT (0)    64-bit HLA(Buffer Extension) CP
                                        only uses 31-bit HLA in SZRBEXTL
00C8  200 Address      4 SZRBEXTH       High word of SZRBEXT
00CC  204 Address      4 SZRBEXTL       Low word of SZRBEXT
00D0  208 Bitstring   40 *              Reserved for SCSI Container use
00F8  248 Bitstring   16 SZRDVREF       IOSC handle for device (devref)
0108  264 Bitstring   16 SZRPSREF       PERS handle for device
0118  280 Bitstring   16 SZRIODON       Vector for caller's iodone
                                        routine
0128  296 Bitstring   16 *              Workarea reserved for IOSC
0138  312 Bitstring   16 *              Workarea reserved for PERS
0148  328 Dbl-Word     8 SZRTODS        Container: TOD Start
0150  336 Dbl-Word     8 SZRTODE        Container: TOD End
0158  344 Bitstring   16 *              Reserved for SCSI Container use
      End of blkioReq_iosct structure architected for z/Series
      Portable Stack.
0168  360 Signed       2 SZREQEND (0)   End of architected request block
      End of architected structs for z/Series Portable I/O Stack.
      Remaining data is for CP use only.
0168  360 Bitstring    4 SZRCPEC        Eye-catcher for start of CP area
016C  364 Signed       4 SZRADRLN       DWORD length of SZRADRLT
0170  368 Address      4 SZRNXTRQ       Copy of SZRFORWL for CP use
0174  372 Address      4 SZREDEVA       31-bit HL EDEV address
0178  376 Address      4 SZRADDRS (0)   Address area
      Start of remappable fields
             **********************************************------
             * Mapping for FBA Emulation
             **********************************************------
0178  376 Address      4 SZRCPSRC       31-bit HL source address of data
                                        to be copied from a temp buffer
0180  384 Address      8 SZRCPTGT       64-bit HA target address of data
                                        to be copied from a temp buffer
0188  392 Signed       4 SZRCPLEN       Number of bytes to be copied from
                                        SZRCPSRC to SZRCPTGT
018C  396 Address      4 * (3)          Reserved for IBM use
             **********************************************------
             * Mapping for Native SCSI Paging
             * Only valid when SZRNATIV flag set.
             **********************************************------
0178  376 Address      4 SZRSVRTN       31-bit HLA(SVGBK) to return to
                                        caller
017C  380 Address      4 SZRSVPIR       31-bit HLA(PIRBK) to obtain IRA
0180  384 Address      4 SZREXPA        31-bit HLA(EXPBK) Exposure Block
                                        addr
0184  388 Address      4 SZRCPEA        31-bit HLA(CPEBK) to return
                                        control from the SCSI container
0188  392 Address      4 SZRTIMER       TOD at start of I/O
018C  396 Address      4 SZRINTIM       TOD at time of interrupt
0190  400 Address      4 SZRNMREQ       Count of active SCSI paging
                                        requests
      End of remappable fields
0194  404 Bitstring    1 SZRCPFLG       Status flags
          1... ....      SZRCONTG       X'80' SZRCONTG Indicates target
                                        address is contiguous with
                                        previous request.
          .1.. ....      SZRIDA         X'40' SZRIDA Represents an IDA
                                        list
          ..1. ....      SZRNATIV       X'20' SZRNATIV This block is for
                                        a native SCSI I/O (FBA Emulation
                                        not used)
          ...1 ....      SZRDONE        X'10' SZRDONE HCPSZADN called for
                                        this block
          .... 1...      SZRNATER       X'08' SZRNATER Native SCSI I/O
                                        error occurred (FBA Emulation not
                                        used)
          .... .1..      SZRNPMUL       X'04' SZRNPMUL Native SCSI Paging
                                        Multi-R/W (FBA Emulation not
                                        used)
          .... ..1.      SZRADR         X'02' SZRADR This block contains
                                        a ADR buffer (mutually exclusive
                                        with SZRTBUF)
          .... ...1      SZRTBUF        X'01' SZRTBUF This block contains
                                        a temp buffer (mutually exclusive
                                        with SZRADR)
0195  405 Bitstring    1 * (3)          RESERVED FOR FUTURE IBM USE
0198  408 Address      8 SZRADRLT (0)   List of 64-bit HA addresses
                                        (entry 1) See SZRADRBX note
                                        below.
0198  408 Address      4 SZRADRLH       High word of SZRADRLT
019C  412 Address      4 SZRADRLL       Low word of SZRADRLT
01A0  416 Character    1 SZRXTND (0)    Start of extended data
          000001A0       SZRBYSZ        *-SZREQ SZREQ byte size
          00000034       SZRDWSZ        (*-SZREQ+7)/8 SZREQ doubleword
                                        size
      SZREQ containing a ADR List with more than 1 entry.
      NOTES      : The ADR List extension MUST immediately follow
            SZRADRLT and can extend to the lesser of the max
            supported by the SCSI container (537 dwords) or the
            max number of dwords that can be allocatd from a
            single page with GETST (see FREMX).
01A0  416 Address      8 SZRADRBX (0)   Entries 2 through n follow...
          000001CA       SZRADRMX       (FREMX-SZRDWSZ)+1 Max elements in
                                        ADR List for non-full page GETST
      SZREQ containing a 512 byte buffer.
01A0  416 Bitstring    1 SZRTBUFR (512) Buffer for a single 512 byte FBA
                                        block space 1
          000003A0       SZRBFBSZ       *-SZREQ SZREQ byte size with temp
                                        buffer
          00000074       SZRBFDSZ       (*-SZREQ+7)/8 SZREQ dword size w/
                                        temp buffer

          
*** SZREQ - SCSI Strategy Call Request Block
*
*     +-----------------------------------------+------+------+
*   0 |                SZRFLGU                  |:FLGEX|:FLGST|
*     +-----------------------------------------+------+------+
*   8 |///////////////////////////////////////////////////////|
*     +-------------------------------------------------------+
*  10 |///////////////////////////////////////////////////////|
*     +---------------------------+---------------------------+
*  18 |         SZRFORWH          |         SZRFORWL          |
*     +---------------------------+---------------------------+
*  20 |///////////////////////////////////////////////////////|
*     +-------------------------------------------------------+
*  28 |///////////////////////////////////////////////////////|
*     +-------------------------------------------------------+
*  30 |///////////////////////////////////////////////////////|
*     +-------------------------------------------------------+
*  38 |///////////////////////////////////////////////////////|
*     +---------------------------+---------------------------+
*  40 |         SZRBLKNH          |         SZRBLKNL          |
*     +---------------------------+---------------------------+
*  48 |         SZRBUFRH          |         SZRBUFRL          |
*     +---------------------------+---------------------------+
*  50 |         SZRBCNTH          |         SZRBCNTL          |
*     +---------------------------+---------------------------+
*  58 |         SZRRSIDH          |         SZRRSIDL          |
*     +---------------------------+---------------------------+
*  60 |///////////////////////////////////////////////////////|
*     +---------------------------+------+--------------------+
*  68 |///////////////////////////|:ERROR|////////////////////|
*     +---------------------------+------+--------------------+
*  70 |///////////////////////////////////////////////////////|
*     =///////////////////////////////////////////////////////=
*     |///////////////////////////////////////////////////////|
*     +-------------------------------------------------------+
*  90 |///////////////////////////////////////////////////////|
*     +---------------------------+---------------------------+
*  98 |///////////////////////////|///////////////////////////|
*     +---------------------------+---------------------------+
*  A0 |         SZRXASI           |         SZRXFLG           |
*     +---------------------------+---------------------------+
*  A8 |         SZRXTOT           |         SZRXUSD           |
*     +---------------------------+---------------------------+
*  B0 |                       SZRXVPN                         |
*     +---------------------------+---------------------------+
*  B8 |         SZRXRPNH          |         SZRXRPNL          |
*     +---------------------------+---------------------------+
*  C0 |///////////////////////////////////////////////////////|
*     +---------------------------+---------------------------+
*  C8 |         SZRBEXTH          |         SZRBEXTL          |
*     +---------------------------+---------------------------+
*  D0 |///////////////////////////////////////////////////////|
*     =///////////////////////////////////////////////////////=
*     |///////////////////////////////////////////////////////|
*     +-------------------------------------------------------+
*  F8 |                       SZRDVREF                        |
*     |                                                       |
*     +-------------------------------------------------------+
* 108 |                       SZRPSREF                        |
*     |                                                       |
*     +-------------------------------------------------------+
* 118 |                       SZRIODON                        |
*     |                                                       |
*     +-------------------------------------------------------+
* 128 |///////////////////////////////////////////////////////|
*     |///////////////////////////////////////////////////////|
*     +-------------------------------------------------------+
* 138 |///////////////////////////////////////////////////////|
*     |///////////////////////////////////////////////////////|
*     +-------------------------------------------------------+
* 148 |                       SZRTODS                         |
*     +-------------------------------------------------------+
* 150 |                       SZRTODE                         |
*     +-------------------------------------------------------+
* 158 |///////////////////////////////////////////////////////|
*     |///////////////////////////////////////////////////////|
*     +-------------------------------------------------------+
*
*** SZREQ - SCSI Strategy Call Request Block
          
*** Overlay for SZREQEND in SZREQ
*
*     +---------------------------+---------------------------+
* 168 |         SZRCPEC           |         SZRADRLN          |
*     +---------------------------+---------------------------+
* 170 |         SZRNXTRQ          |         SZREDEVA          |
*     +---------------------------+---------------------------+
*
*** Overlay for SZREQEND in SZREQ
          
*** Overlay for SZRADDRS in SZREQ
*
*     +---------------------------+---------------------------+
* 178 |         SZRCPSRC          |///////////////////////////|
*     +---------------------------+---------------------------+
* 180 |                       SZRCPTGT                        |
*     +---------------------------+---------------------------+
* 188 |         SZRCPLEN          |///////////////////////////|
*     +---------------------------+///////////////////////////|
*     |///////////////////////////////////////////////////////|
*     +-------------------------------------------------------+
* 198
*
*** Overlay for SZRADDRS in SZREQ
          
*** Overlay for SZRADDRS in SZREQ
*
*     +---------------------------+---------------------------+
* 178 |         SZRSVRTN          |         SZRSVPIR          |
*     +---------------------------+---------------------------+
* 180 |         SZREXPA           |         SZRCPEA           |
*     +---------------------------+---------------------------+
* 188 |         SZRTIMER          |         SZRINTIM          |
*     +---------------------------+------+--------------------+
* 190 |         SZRNMREQ          |:CPFLG|////////////////////|
*     +---------------------------+------+--------------------+
* 198 |         SZRADRLH          |         SZRADRLL          |
*     +---------------------------+---------------------------+
*
*** Overlay for SZRADDRS in SZREQ
          
*** Overlay for SZRXTND in SZREQ
*
*
*** Overlay for SZRXTND in SZREQ
          
*** Overlay for SZRXTND in SZREQ
*
*     +-------------------------------------------------------+
* 1A0 |                                                       |
*     =                       SZRTBUFR                        =
*     |                                                       |
*     +-------------------------------------------------------+
* 3A0
*
*** Overlay for SZRXTND in SZREQ

 
Symbol         Dspl Value
-------------- ---- -----
SZRADDRS       0178
SZRADR         0194 02
SZRADRBX       01A0
SZRADRLH       0198
SZRADRLL       019C
SZRADRLN       016C
SZRADRLT       0198
SZRADRMX       01A0 000001CA
SZRBASYN       0006 01
SZRBBUSY       0007 08
SZRBCNT        0050
SZRBCNTH       0050
SZRBCNTL       0054
SZRBDONE       0007 02
SZRBERR        0007 04
SZRBEXT        00C8
SZRBEXTH       00C8
SZRBEXTL       00CC
SZRBFBSZ       01A0 000003A0
SZRBFDSZ       01A0 00000074
SZRBLKNH       0040
SZRBLKNL       0044
SZRBLKNO       0040
SZRBMORE       0006 10
SZRBPROT       0006 40
SZRBREAD       0007 01
SZRBSPLT       0006 80
SZRBUFRA       0048
SZRBUFRH       0048
SZRBUFRL       004C
SZRBWRIT       0007 00
SZRBYSZ        01A0 000001A0
SZRCONTG       0194 80
SZRCPEA        0184
SZRCPEC        0168
SZRCPFLG       0194
SZRCPLEN       0188
SZRCPSRC       0178
SZRCPTGT       0180
SZRDONE        0194 10
SZRDVREF       00F8
SZRDWSZ        01A0 00000034
SZREACCE       006C 0D
SZREAGAI       006C 0B
SZREBUSY       006C 10
SZRECONN       006C 4F
SZREDEAD       006C 74
SZREDEVA       0174
SZREEXIS       006C 11
SZREFAUL       006C 0E
SZREFORM       006C 30
SZREINPR       006C 37
SZREINVA       006C 16
SZREIO         006C 05
SZREMEDI       006C 6E
SZRENETD       006C 45
SZRENETU       006C 46
SZRENOCO       006C 32
SZRENODE       006C 13
SZRENOEN       006C 02
SZRENOLC       006C 31
SZRENOME       006C 0C
SZRENOTR       006C 2E
SZRENXIO       006C 06
SZREPERM       006C 01
SZREPURG       006C 81
SZREQEND       0168
SZRERANG       006C 22
SZRERROR       006C
SZRESOFT       006C 6F
SZRESTAL       006C 34
SZRETIME       006C 4E
SZREUNAT       006C 2A
SZREWRPR       006C 2F
SZREXPA        0180
SZRFLGEX       0006
SZRFLGST       0007
SZRFLGU        0000
SZRFORW        0018
SZRFORWH       0018
SZRFORWL       001C
SZRIDA         0194 40
SZRINTIM       018C
SZRIODON       0118
SZRNATER       0194 08
SZRNATIV       0194 20
SZRNMREQ       0190
SZRNPMUL       0194 04
SZRNXTRQ       0170
SZRPSREF       0108
SZRRESID       0058
SZRRSIDH       0058
SZRRSIDL       005C
SZRSVPIR       017C
SZRSVRTN       0178
SZRTBUF        0194 01
SZRTBUFR       01A0
SZRTIMER       0188
SZRTODE        0150
SZRTODS        0148
SZRXASI        00A0
SZRXFLG        00A4
SZRXMEM        00A0
SZRXRPN        00B8
SZRXRPNH       00B8
SZRXRPNL       00BC
SZRXTND        01A0
SZRXTOT        00A8
SZRXUSD        00AC
SZRXVMTP       00A0 00FFFF9C
SZRXVPN        00B0