Programming Interface Information:
The Monitor Records are intended Programming Interfaces that
allow the customer to write programs to obtain services of z/VM.

MRIODQDA

Prolog
Control Block Contents
Cross Reference

MRIODQDA Prolog

 DSECT NAME - IODQDA
 FUNCTION - Map a Monitor record.
 LOCATED BY -
        Through the Monitor Control Area
 REFERENCED CONTROL BLOCKS -
        MRRECHDR    Monitor Record Header
 NAME - MRIODQDA
 DESCRIPTIVE NAME - Monitor Event Record
                    Domain 6 - I/O Domain
                    Record 25 - QDIO Device Activation
 DESCRIPTION - Indicates that a QDIO device has been activated.
 NOTES -
  1.  This record is emitted for only real QDIO devices for which
      z/VM CP is maintaining shadow queues.  (If CP is not shadowing
      the queues, it doesn't see the I/O and therefore can't emit
      this record.)  Typically Linux guests would use shadow queues
      but z/VM TCP/IP would not.  z/VM TCP/IP drives its real QDIO
      devices using Diag X'98' and does not use shadow queues.

MRIODQDA Control Block Contents

Offsets
Dec  Hex  Type        Len  Name (Dim)             Description
 
   0   0  Structure    43  IODQDA                 Start of monitor record
   0   0  Character     0  IODQDA_MRHDR           Record header. See
                                                  MRRECHDR.
   0   0  Character    20  MRHDR
   0   0  Unsigned      2  MRHDRLEN
   2   2  Unsigned      2  MRHDRZER
   4   4  Unsigned      1  MRHDRDM
   5   5  Unsigned      1  *
   6   6  Unsigned      2  MRHDRRC
   8   8  Character     8  MRHDRTOD
  16  10  Character     4  *
  20  14  Character     0  MRHDR_END
  20  14  Unsigned      2  IODQDA_RDEVDEV         Real device number (data
                                                  dev)
  22  16  Character     8  IODQDA_VMDUSER         Owning user ID.
  30  1E  Unsigned      2  IODQDA_VDEVDEV         Owner virtual device
                                                  number.
  32  20  Unsigned      2  IODQDA_QDIOFMT         QDIO format type 0=QDIO
                                                  1=FCP 2=HIPERSOCKETS 8=EQDIO
  34  22  Unsigned      2  IODQDA_QDINPCT         Number of input queues.
  36  24  Unsigned      2  IODQDA_QDIOUTCT        Number of output queues.
  38  26  Bitstring     4  IODQDA_STATUS          status bits
          1... ....        IODQDA_QDIOQMCU         QDIO multi ctlunit support
          .1.. ....        IODQDA_QDIOEBSM         QEBSM Managed QDIO
                                                  Connection
          ..1. ....        IODQDA_VDEVMBSF         Multiple Buffer Streaming
                                                  Facility in use
          ...1 ....        IODQDA_QDICOMPQ         Last Input Queue is a
                                                  Completion Queue
          .... 1...        *
          .... .1..        *
          .... ..1.        *
          .... ...1        *
  38  26  Bitstring     1  *                      reserved for future IBM
  39  27  Bitstring     1  *                      reserved for future IBM
  40  28  Bitstring     1  *                      reserved for future IBM
  42  2A  Unsigned      1  IODQDA_RDEVOSAS        OSA Subtype - This field
                                                  indicates the type of network
                                                  device. Not a Network Device:
                                                  = 0 HiperSockets: IQD CHPID =
                                                  1 External Bridged = 6 IBM
                                                  RESERVED = 7 QDIO: OSA CHPID
                                                  = 2 OSE CHPID = 2 OSD CHPID =
                                                  2 OSN CHPID = 3 IBM RESERVED
                                                  = 4 IBM RESERVED = 5
                                                  EQDIO: OSH CHPID  = 8
  43  2B  Bitstring     1  *                      Reserved
  44  2C  Character     0  IODQDA_END

MRIODQDA Cross Reference

                      Hex           Hex
Name                  Offset Length Value
 
IODQDA                     0     43
IODQDA_END                2C      0
IODQDA_MRHDR               0      0
IODQDA_QDICOMPQ           26           10
IODQDA_QDINPCT            22      2
IODQDA_QDIOEBSM           26           40
IODQDA_QDIOFMT            20      2
IODQDA_QDIOQMCU           26           80
IODQDA_QDIOUTCT           24      2
IODQDA_RDEVDEV            14      2
IODQDA_RDEVOSAS           2A      1
IODQDA_STATUS             26      4
IODQDA_VDEVDEV            1E      2
IODQDA_VDEVMBSF           26           20
IODQDA_VMDUSER            16      8
MRHDR                      0     20
MRHDR_END                 14      0
MRHDRDM                    4      1
MRHDRLEN                   0      2
MRHDRRC                    6      2
MRHDRTOD                   8      8
MRHDRZER                   2      2

This information is
based on z/VM V7R3.0.

Last updated on 09 May 2025 at 14:58:05.

Copyright IBM Corporation, 1990, 2025