LDVBK | Back to Index page

| Prolog Control Block Contents LDVBK DSECT Storage Layout Cross Reference (Contains links to field and bit definitions) |
Programming Interface Information: This information is NOT intended to be used as Programming Interfaces of z/VM.

LDVBK Prolog | Top of page

     NAME       : HCPLDVBK
     DESCRIPTION: ISFC Link Device Extension
     DSECT      : LDVBK
     FUNCTION   :
                  This structure acts as an extension of the RDEV
                  for an ISFC link device.  One LDVBK exists for
                  each device that is attached to ISFC.  One or more
                  link devices (LDVBKs) may be associated with the
                  same link (LNKBK).
     LOCATED BY :
                  LNKDVTBL  (pointer) to the chain of LDVBK structures
                  associated with this link.  The chain is
                  linked by LDVFPNT and LDVBPNT pointers.
                  RDEVCFDV  (pointer).
     CREATED BY :
                  Operation of the 'ACTIVATE ISLINK' command.
     DELETED BY :
                  Operation of the 'DEACTIVE ISLINK' command.
     SERIALIZED :
                  - LDVLKWRD is held Exclusive to update these fields.
                  - LDVLKWRD is held Shared or Exclusive to reference
                  these fields.
                  - LDVLKWRD may be held (exclusive) across some calls
                  as LDVLKWRD ownership follows a given task.
                  - LDVINUSE (TS lock) is obtained (NO SPIN) to indicate
                  the device is busy.  If the TS fails, the device is
                  presumed to be busy with some other task.  If the
                  TS suceeds, a new data transfer operation may be
                  performed before resetting LDVINUSE.
                  - Exceptions are noted below.
     RELOCATION CONSIDERATIONS : None

LDVBK Control Block Content | Top of page

     LDVBK DSECT
    Top of page

    Hex   Dec Type/Val   Lng Label (dup)    Comments
    ---- ---- --------- ---- -------------- --------
    0000    0 Structure      LDVBK          ISFC Link Device Extension
          Device identification and linkage.
    0000    0 Character    4 LDVDEVID       Printable hex device number
    0004    4 Signed       4 LDVDEVNO       Real device address
    0008    8 Address      4 LDVLNKBK       Base LNKBK addr (Hold RDEV lock)
    000C   12 Character    4 LDVTYPE        Link Type (e.g. FCTC)
    0010   16 Address      4 LDVRDEV        RDEV address
    0014   20 Address      4 LDVEXTBK       Pointer to CTCBK (LNKDRV00)
          Device table pointers (LDVFPNT and LDVBPNT).
            When this device is disconnected (LDVLKWRD==0) these
            pointers link to other devices in the Disconnected
            Device chain at HCPBUTDV (serialized by the ISFC
            Global Lock).
            When this device is connected (LDVLKWRD==nonzero) these
            pointers link to other devices belonging to the same
            LNKBK (serialized by the LNKLKWRD).
    0018   24 Address      4 LDVFPNT        Pointer to next LDVBK
    001C   28 Address      4 LDVBPNT        Pointer to prev LDVBK
          When LDVDFNOD is not null, it is the defined NODEID.
            If the actual remote NODEID does not match the
            defined (expected) NODEID, this device is unuseable.
    0020   32 Character    8 LDVDFNOD       Defined Node ID
          LDVUSER records the VM userid that most recently
          activated or deactivated this device.
    0028   40 Character    8 LDVUSER        Command invoker
          Link device lock (LKWRD).
    0030   48 Bitstring   24 LDVLKWRD       LKWRD for device configuration
          Remote Node Information (only valid for type FCTC).
            These fields are serialized by LDVLKWRD.
    0048   72 Bitstring    8 LDVRMVER       Remote Driver Version
    0050   80 Bitstring    8 LDVRMCAP       Remote Driver Capabilities
    0058   88 Character    8 LDVRMNOD       Remote Node ID
    0060   96 Character    4 LDVRMDEV       Remote Device Address
    0064  100 Signed       2 LDVRMMFL       Remote Maximum Frame Length
    0066  102 Character   18 LDVRMUID       Remote Identifier
    0078  120 Signed       2 LDVBUFCT       Remote buffer count (LNKDRV00)
    007A  122 Signed       2 LDVRFCTR       Outstanding reference counter
                                            (the number of tasks that need
                                            this LDVBK but do NOT currently
                                            hold LDVLKWRD)
    007C  124 Bitstring    1 LDVINUSE       TS latch for data transfer
    007D  125 Bitstring    1 LDVREASON      Reason device reset
              00000001       LDV_RSNRESET   1 LDV_RSNRESET - Device reset
              00000002       LDV_RSNDEACT   2 LDV_RSNDEACT - Device
                                            deactivated
              00000003       LDV_RSNMIH     3 LDV_RSNMIH - Missing Interrupt
                                            detected
              00000004       LDV_RSNDUPID   4 LDV_RSNDUPID - Duplicate nodeid
                                            detected
              00000005       LDV_RSNDRIVER  5 LDV_RSNDRIVER - Incompatible
                                            driver detected
              00000006       LDV_RSNLINK    6 LDV_RSNLINK - Link Level reset
    007E  126 Signed       2 LDVRMDID       Remote Devno
          Device status.
    0080  128 Bitstring    1 LDVDVFLG       Device Flag
              1... ....      LDVDVINI       X'80' LDVDVINI - Initializing
                                            device
              .1.. ....      LDVDVDET       X'40' LDVDVDET - Detached device
              ..1. ....      LDVDVBUF       X'20' LDVDVBUF - Device buffer is
                                            active
              ...1 ....      LDVDVDSC       X'10' LDVDVDSC - Disconnecting
                                            device
    0081  129 Bitstring    1 LDVSETUP       Initialization stages
              1... ....      LDVRESET       X'80' LDVRESET - I/O reset was
                                            done
              .1.. ....      LDVEXTMD       X'40' LDVEXTMD - Extended Mode
                                            was set
              ..1. ....      LDVWRXID       X'20' LDVWRXID - Write XID was
                                            done
              ...1 ....      LDVRDXID       X'10' LDVRDXID - Read XID was
                                            done
    0082  130 Bitstring    1 LDVSTAT        Device status
              00000000       LNKDVCTL       0 LNKDVCTL - Device Control mode
              00000000       LNKINIT        0 LNKINIT - Initialization in
                                            progress
              00000001       LNKIDLE        1 LNKIDLE - Idle
              00000002       LNKBUSY        2 LNKBUSY - Busy
              00000003       LNKWRITE       3 LNKWRITE - Write in progress
              00000004       LNKREAD        4 LNKREAD - Read in progress
              00000005       LNKRESET       5 LNKRESET - Reset in progress
              00000006       LNKATTN        6 LNKATTN - Handling link
                                            attention
              00000007       LNKFATAL       7 LNKFATAL - Fatal I/O on link
              00000008       LNKDEACT       8 LNKDEACT - Deactivation in
                                            progress
          LDVMODE indicates the current operating mode.
            LDVDISC   This side (the X-SIDE) is disconnected from
                      the driver on the other side (the Y-SIDE).
                      We need to initialize (or reset) our
                      conversation with that driver.
            LDVINIMD  Initialization is in progress for this device.
                      We are involved in establishing a connection
                      with the Y-SIDE driver.  When we are in synch
                      with the Y-SIDE driver, we can move to LDVLINK
                      mode to create (or join) a logical link.
            LDVLINK   We are connected to a Y-SIDE driver, and
                      creating (or joining) a logical link.
            LDVIDLE   We are connected to a logical link (LNKBK)
                      and ready for data transfer.
            LDVXFRMD  We are involved in a data transfer sequence.
                      Normally we go to LDVIDLE mode when the
                      sequence is done.
            LDVTRMMD  We are terminating the prior mode for this
                      device.  When termination is complete, this
                      device returns to LDVDISC mode (or is removed).
    0083  131 Bitstring    1 LDVMODE        Operational Mode
              00000000       LDVDISC        0 LDVDISC - Disconnected from
                                            neighbor
              00000001       LDVINIMD       1 LDVINIMD - Initialization in
                                            progress
              00000002       LDVLINK        2 LDVLINK - Link formation in
                                            progress
              00000003       LDVIDLE        3 LDVIDLE - Idle (ready for work)
              00000004       LDVXFRMD       4 LDVXFRMD - Data Transfer Mode
              00000005       LDVCTLMD       5 LDVCTLMD - Device Control Mode
              00000006       LDVTRMMD       6 LDVTRMMD - Termination Mode
    0084  132 Bitstring    1 LDVCONN        Device connection status
              1... ....      LDVREADY       X'80' LDVREADY - Interface is
                                            ready
              .1.. ....      LDVDRVID       X'40' LDVDRVID - Known driver
                                            level (LDVLEVEL)
              ..1. ....      LDVLINIT       X'20' LDVLINIT - Started by local
                                            node
              ...1 ....      LDVRINIT       X'10' LDVRINIT - Started by
                                            remote node
              .... 1...      LDVRSTOP       X'08' LDVRSTOP - Stopped by
                                            remote node
    0085  133 Bitstring    1 LDVERROR       Most recent error condition
              00000000       LDV_NONE       0 LDV_NONE - No error
              00000001       LDV_NOTREADY   1 LDV_NOTREADY - NOTREADY
                                            (Y-SIDE)
              00000002       LDV_READSEQ    2 LDV_READSEQ - Read out of
                                            sequence
              00000003       LDV_EOFSEQ     3 LDV_EOFSEQ - EOF out of
                                            sequence
              00000004       LDV_BADLEN     4 LDV_BADLEN - Bad frame length
              00000005       LDV_BADTYPE    5 LDV_BADTYPE - Bad frame type
              00000006       LDV_TIMEOUT    6 LDV_TIMEOUT - I/O Timeout
              00000007       LDV_STOPPED    7 LDV_STOPPED - Stopped by Y-SIDE
              00000008       LDV_DRIVER     8 LDV_DRIVER - Incompatible
                                            Y-SIDE driver
              00000009       LDV_DUPLICATE  9 LDV_DUPLICATE - Duplicate Node
              0000000A       LDV_IOMISC     10 LDV_IOMISC - Miscellaneous I/O
                                            error
              0000000B       LDV_FATAL      11 LDV_FATAL - Fatal I/O error
                                            Notes : LDVLEVEL is serialized by
                                            LDVLKWRD.
    0086  134 Bitstring    1 LDVLEVEL       Device Driver Level
              00000000       LNKLVL00       0 LNKLVL00 - Driver not confirmed
              00000001       LNKLVL01       1 LNKLVL01 - Driver using MDEBK
              00000002       LNKLVL02       2 LNKLVL02 - Driver using MBHBK
    0087  135 Bitstring    1 LDVMIH         Current Device MIH State
              00000000       LDVMIOFF       0 LDVMIOFF - No MIH support
              00000001       LDVMIBYP       1 LDVMIBYP - MIH temporarily
                                            disabled
              00000002       LDVMIALT       2 LDVMIALT - Alternate MIRATE in
                                            use
              00000003       LDVMIENB       3 LDVMIENB - Normal MIRATE in use
              00000006       LDVMIRAT       6 LDVMIRAT Normal MIRATE for a
                                            Link Device LDVMIRAT * 5 = # of
                                            Seconds
          Active work areas.
    0088  136 Address      4 LDVTXWRK       Pointer to TX LWKBK
    008C  140 Address      4 LDVRXWRK       Pointer to RX LWKBK
          Links for dispatch priority sequence.
    0090  144 Address      4 LDVFPDS        Ptr to next for device selection
    0094  148 Address      4 LDVBPDS        Ptr to prev for device selection
          Low level I/O activity.
    0098  152 Signed       4 LDVUPARM       ORB Word 0 (User PARM value)
    009C  156 Signed       4 LDVOCTL        ORB Word 1 (control flags)
    00A0  160 Address      4 LDVCPA         ORB Word 2 (CPA) HA
    00A4  164 Address      4 LDVIORBK       IORBK for outgoing I/O
    00A8  168 Dbl-Word     8 LDVIOTOD       TOD when I/O started
    00B0  176 Dbl-Word     8 LDVLKTRC       LDVLKWRD obtainer info (R13,R14)
    00B8  184 Bitstring    1 LDVCFLG        Control flags
              1... ....      LDVXRTRY       X'80' LDVXRTRY - Enable ATTN+BUSY
                                            retry logic
    00B9  185 Bitstring    1 LDVIOPND       I/O Pending Status
              1... ....      LDVSIOPD       X'80' LDVSIOPD - Start Pending
              .1.. ....      LDVINTPD       X'40' LDVINTPD - Interrupt
                                            Pending
              ..1. ....      LDVATTPD       X'20' LDVATTPD - ATTN status
                                            pending
              ...1 ....      LDVDEPD        X'10' LDVDEPD - DE status pending
    00BA  186 Bitstring    1 LDVIOSTS       Pending Device I/O Status
    00BB  187 Bitstring    1 LDVRMCMD       Remote CCW Command (SCB buffer)
    00BC  188 Address      4 LDVRSCPA       Pointer to Restart CPA
    00C0  192 Signed       4 LDVRETRY       Retry count
    00C4  196 Bitstring    4 LDVXCCW0 (0)   Last CCW (word 0)
                                            IORETCOD<>0
    00C4  196 Bitstring    1 LDVXCMD        CCW command
    00C5  197 Bitstring    1 LDVXFLAG       CCW flag
    00C6  198 Bitstring    2 LDVXCNT        CCW byte count
          Work area for CCWs.
    00C8  200 Dbl-Word     8 LDV_CCW1       Space for a CCW
    00D0  208 Dbl-Word     8 LDV_CCW2       Space for a CCW
    00D8  216 Dbl-Word     8 LDV_CCW3       Space for a CCW
          Type 09 Accounting Record (Link Statistics) columns 29-78.
          Notes      :
            Map LNKACOLS using HCPACOBK at ACOCFLS.
          - For LDVTYPE=CTCA, these fields are protected by the
            LNKBK lock.
          - For LDVTYPE=FCTC, these fields are protected by
            Compare and Swap logic.
    00E0  224 Bitstring   50 LDVACOLS       (29-78) for Type 09 Accounting
    0112  274 Signed       2 LDVMFL         Local DDBUF length
    0114  276 Signed       4 LDVCTSI        Validate UI currency (RDEVCTSI)
          Device level I/O activity counters.
    0118  280 Dbl-Word     8 LDVRXMSG       Receive Message Count
    0120  288 Dbl-Word     8 LDVRXBYT       Receive Byte Count
    0128  296 Dbl-Word     8 LDVTXMSG       Sent Message Count
    0130  304 Dbl-Word     8 LDVTXBYT       Sent Byte Count
          Device control latches.
    0138  312 Bitstring    1 LDVOP          Operational status
              00000000       LDVOP_NORMAL   0 LDVOP_NORMAL - Normal
                                            operational status
              000000FF       LDVOP_SUSPEND  255 LDVOP_SUSPEND - Suspend /
                                            quiesce activity
    0139  313 Bitstring    1 LDVDET         Detach action
              00000000       LDVDET_KEEP    0 LDVDET_KEEP - Keep this device
              000000FF       LDVDET_REMOVE  255 LDVDET_REMOVE - Remove this
                                            device
    013A  314 Bitstring    6 *              Reserved for IBM use
          Buffer for independent read operations.
    0140  320 Dbl-Word     8 LDV_DDBUF (0)  Array of device buffer frames
    0140  320 Address      8 LDV_DDBUF1     HA Pointer to 4KB buffer
    0148  328 Address      8 LDV_DDBUF2     HA Pointer to 4KB buffer
    0150  336 Address      8 LDV_DDBUF3     HA Pointer to 4KB buffer
              00000003       LDVMFC         3 LDV_DDBUF pages defined
          TOD when this LDVBK was defined (ACTIVATE ISLINK)
    0158  344 Dbl-Word     8 LDVDFTOD       TOD when LDVBK was defined
          TOD used while connecting to the Y-SIDE neighbor
    0160  352 Dbl-Word     8 LDVCNTOD       TOD when connecting to Y-SIDE
          Most recent LWKSEQNO frames processed on this device.
    0168  360 Signed       2 LDVTXSEQ       Latest TX LWKSEQNO on this dev
    016A  362 Signed       2 LDVRXSEQ       Latest RX LWKSEQNO on this dev
    016C  364 Signed       2 LDVBUFLN       Actual LDV_DDBUF length
    016E  366 Bitstring   10 *              Reserved for IBM Use
    0178  376 Bitstring    8 LDVCT_WRCOLL   Write collisions
    0180  384 Bitstring    8 LDVCT_TXLWK    Packages sent
    0188  392 Bitstring    8 LDVCT_RXLWK    Packages received
    0190  400 Bitstring   16 *              Reserved for IBM use
    01A0  416 Bitstring    1 LDVBK$ (0)     End of LDVBK
              00000034       LDVSIZE        (*-LDVBK+7)/8 Size, in
                                            doublewords, of LDVBK

LDVBK Storage Layout | Top of page

    *** LDVBK - ISFC Link Device Extension
    *
    *     +---------------------------+---------------------------+
    *   0 |         LDVDEVID          |         LDVDEVNO          |
    *     +---------------------------+---------------------------+
    *   8 |         LDVLNKBK          |         LDVTYPE           |
    *     +---------------------------+---------------------------+
    *  10 |         LDVRDEV           |         LDVEXTBK          |
    *     +---------------------------+---------------------------+
    *  18 |         LDVFPNT           |         LDVBPNT           |
    *     +---------------------------+---------------------------+
    *  20 |                       LDVDFNOD                        |
    *     +-------------------------------------------------------+
    *  28 |                       LDVUSER                         |
    *     +-------------------------------------------------------+
    *  30 |                                                       |
    *     =                       LDVLKWRD                        =
    *     |                                                       |
    *     +-------------------------------------------------------+
    *  48 |                       LDVRMVER                        |
    *     +-------------------------------------------------------+
    *  50 |                       LDVRMCAP                        |
    *     +-------------------------------------------------------+
    *  58 |                       LDVRMNOD                        |
    *     +---------------------------+-------------+-------------+
    *  60 |         LDVRMDEV          |  LDVRMMFL   |             |
    *     +---------------------------+-------------+             |
    *     |                       LDVRMUID                        |
    *     |                                                       |
    *     +-------------+-------------+------+------+-------------+
    *  78 |  LDVBUFCT   |  LDVRFCTR   |:INUSE|(07D) |  LDVRMDID   |
    *     +------+------+------+------+------+------+------+------+
    *  80 |:DVFLG|:SETUP|:STAT |:MODE |:CONN |:ERROR|:LEVEL|LDVMIH|
    *     +------+------+------+------+------+------+------+------+
    *  88 |         LDVTXWRK          |         LDVRXWRK          |
    *     +---------------------------+---------------------------+
    *  90 |         LDVFPDS           |         LDVBPDS           |
    *     +---------------------------+---------------------------+
    *  98 |         LDVUPARM          |         LDVOCTL           |
    *     +---------------------------+---------------------------+
    *  A0 |          LDVCPA           |         LDVIORBK          |
    *     +---------------------------+---------------------------+
    *  A8 |                       LDVIOTOD                        |
    *     +-------------------------------------------------------+
    *  B0 |                       LDVLKTRC                        |
    *     +------+------+------+------+---------------------------+
    *  B8 |:CFLG |:IOPND|:IOSTS|:RMCMD|         LDVRSCPA          |
    *     +------+------+------+------+------+------+-------------+
    *  C0 |         LDVRETRY          |:XCMD |:XFLAG|  LDVXCNT    |
    *     +---------------------------+------+------+-------------+
    *  C8 |                       LDV_CCW1                        |
    *     +-------------------------------------------------------+
    *  D0 |                       LDV_CCW2                        |
    *     +-------------------------------------------------------+
    *  D8 |                       LDV_CCW3                        |
    *     +-------------------------------------------------------+
    *  E0 |                                                       |
    *     =                       LDVACOLS                        =
    *     |             +-------------+---------------------------+
    * 110 |             |   LDVMFL    |         LDVCTSI           |
    *     +-------------+-------------+---------------------------+
    * 118 |                       LDVRXMSG                        |
    *     +-------------------------------------------------------+
    * 120 |                       LDVRXBYT                        |
    *     +-------------------------------------------------------+
    * 128 |                       LDVTXMSG                        |
    *     +-------------------------------------------------------+
    * 130 |                       LDVTXBYT                        |
    *     +------+------+-----------------------------------------+
    * 138 |LDVOP |LDVDET|/////////////////////////////////////////|
    *     +------+------+-----------------------------------------+
    * 140 |                      LDV_DDBUF1                       |
    *     +-------------------------------------------------------+
    * 148 |                      LDV_DDBUF2                       |
    *     +-------------------------------------------------------+
    * 150 |                      LDV_DDBUF3                       |
    *     +-------------------------------------------------------+
    * 158 |                       LDVDFTOD                        |
    *     +-------------------------------------------------------+
    * 160 |                       LDVCNTOD                        |
    *     +-------------+-------------+-------------+-------------+
    * 168 |  LDVTXSEQ   |  LDVRXSEQ   |  LDVBUFLN   |/////////////|
    *     +-------------+-------------+-------------+/////////////|
    *     |///////////////////////////////////////////////////////|
    *     +-------------------------------------------------------+
    * 178 |                     LDVCT_WRCOLL                      |
    *     +-------------------------------------------------------+
    * 180 |                     LDVCT_TXLWK                       |
    *     +-------------------------------------------------------+
    * 188 |                     LDVCT_RXLWK                       |
    *     +-------------------------------------------------------+
    * 190 |///////////////////////////////////////////////////////|
    *     |///////////////////////////////////////////////////////|
    *     +-------------------------------------------------------+
    *
    *** LDVBK - ISFC Link Device Extension

LDVBK Cross Reference | Top of page

    Symbol         Dspl Value
    -------------- ---- -----
    LDV_BADLEN     0085 00000004
    LDV_BADTYPE    0085 00000005
    LDV_CCW1       00C8
    LDV_CCW2       00D0
    LDV_CCW3       00D8
    LDV_DDBUF      0140
    LDV_DDBUF1     0140
    LDV_DDBUF2     0148
    LDV_DDBUF3     0150
    LDV_DRIVER     0085 00000008
    LDV_DUPLICATE  0085 00000009
    LDV_EOFSEQ     0085 00000003
    LDV_FATAL      0085 0000000B
    LDV_IOMISC     0085 0000000A
    LDV_NONE       0085 00000000
    LDV_NOTREADY   0085 00000001
    LDV_READSEQ    0085 00000002
    LDV_RSNDEACT   007D 00000002
    LDV_RSNDRIVER  007D 00000005
    LDV_RSNDUPID   007D 00000004
    LDV_RSNLINK    007D 00000006
    LDV_RSNMIH     007D 00000003
    LDV_RSNRESET   007D 00000001
    LDV_STOPPED    0085 00000007
    LDV_TIMEOUT    0085 00000006
    LDVACOLS       00E0
    LDVATTPD       00B9 20
    LDVBK$         01A0
    LDVBPDS        0094
    LDVBPNT        001C
    LDVBUFCT       0078
    LDVBUFLN       016C
    LDVCFLG        00B8
    LDVCNTOD       0160
    LDVCONN        0084
    LDVCPA         00A0
    LDVCT_RXLWK    0188
    LDVCT_TXLWK    0180
    LDVCT_WRCOLL   0178
    LDVCTLMD       0083 00000005
    LDVCTSI        0114
    LDVDEPD        00B9 10
    LDVDET         0139
    LDVDET_KEEP    0139 00000000
    LDVDET_REMOVE  0139 000000FF
    LDVDEVID       0000
    LDVDEVNO       0004
    LDVDFNOD       0020
    LDVDFTOD       0158
    LDVDISC        0083 00000000
    LDVDRVID       0084 40
    LDVDVBUF       0080 20
    LDVDVDET       0080 40
    LDVDVDSC       0080 10
    LDVDVFLG       0080
    LDVDVINI       0080 80
    LDVERROR       0085
    LDVEXTBK       0014
    LDVEXTMD       0081 40
    LDVFPDS        0090
    LDVFPNT        0018
    LDVIDLE        0083 00000003
    LDVINIMD       0083 00000001
    LDVINTPD       00B9 40
    LDVINUSE       007C
    LDVIOPND       00B9
    LDVIORBK       00A4
    LDVIOSTS       00BA
    LDVIOTOD       00A8
    LDVLEVEL       0086
    LDVLINIT       0084 20
    LDVLINK        0083 00000002
    LDVLKTRC       00B0
    LDVLKWRD       0030
    LDVLNKBK       0008
    LDVMFC         0150 00000003
    LDVMFL         0112
    LDVMIALT       0087 00000002
    LDVMIBYP       0087 00000001
    LDVMIENB       0087 00000003
    LDVMIH         0087
    LDVMIOFF       0087 00000000
    LDVMIRAT       0087 00000006
    LDVMODE        0083
    LDVOCTL        009C
    LDVOP          0138
    LDVOP_NORMAL   0138 00000000
    LDVOP_SUSPEND  0138 000000FF
    LDVRDEV        0010
    LDVRDXID       0081 10
    LDVREADY       0084 80
    LDVREASON      007D
    LDVRESET       0081 80
    LDVRETRY       00C0
    LDVRFCTR       007A
    LDVRINIT       0084 10
    LDVRMCAP       0050
    LDVRMCMD       00BB
    LDVRMDEV       0060
    LDVRMDID       007E
    LDVRMMFL       0064
    LDVRMNOD       0058
    LDVRMUID       0066
    LDVRMVER       0048
    LDVRSCPA       00BC
    LDVRSTOP       0084 08
    LDVRXBYT       0120
    LDVRXMSG       0118
    LDVRXSEQ       016A
    LDVRXWRK       008C
    LDVSETUP       0081
    LDVSIOPD       00B9 80
    LDVSIZE        01A0 00000034
    LDVSTAT        0082
    LDVTRMMD       0083 00000006
    LDVTXBYT       0130
    LDVTXMSG       0128
    LDVTXSEQ       0168
    LDVTXWRK       0088
    LDVTYPE        000C
    LDVUPARM       0098
    LDVUSER        0028
    LDVWRXID       0081 20
    LDVXCCW0       00C4
    LDVXCMD        00C4
    LDVXCNT        00C6
    LDVXFLAG       00C5
    LDVXFRMD       0083 00000004
    LDVXRTRY       00B8 80
    LNKATTN        0082 00000006
    LNKBUSY        0082 00000002
    LNKDEACT       0082 00000008
    LNKDVCTL       0082 00000000
    LNKFATAL       0082 00000007
    LNKIDLE        0082 00000001
    LNKINIT        0082 00000000
    LNKLVL00       0086 00000000
    LNKLVL01       0086 00000001
    LNKLVL02       0086 00000002
    LNKREAD        0082 00000004
    LNKRESET       0082 00000005
    LNKWRITE       0082 00000003

This information is based on z/VM 7.2.0 Last updated on 24 Jun 2020 at 09:28:56 EDT.
Copyright IBM Corporation, 1990, 2020