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Hex Dec Type/Val Lng Label (dup) Comments
---- ---- --------- ---- -------------- --------
0000 0 Structure SNDBK *BLOCKIO's IUCV SEND Request Block
0000 0 Address 4 SNDNEXT Pointer to next SNDBK for this
virtual device
0004 4 Bitstring 1 SNDOPER Operation field for SEND Request
1... .... SNDMONO X'80' SNDMONO Indicate Single BLK
SEND REQ Protocol
.1.. .... SNDMULTI X'40' SNDMULTI Indicate Multi BLK
SEND REQ Protocol
..1. .... SNDIWAIT X'20' SNDIWAIT Indicate waiting
for I/O interrupts
...1 .... SNDSYNC X'10' SNDSYNC Guest is requesting
syn- chronous processing.
0005 5 Bitstring 1 SNDRC IUCV Reply Return Code
0006 6 Signed 2 SNDSSHCT Number of real SSCH issued to
handle this send request.
0008 8 Dbl-Word 8 SNDIL2IA IUCV *BLOCKIO indirect level-2
operand I-ASIT. This I-ASIT
identifies the address space
containing *BLOCKIO indirect
level-2 operands, the guest
mulit-block data buffer
addresses.
0010 16 Signed 4 SNDDVIAD Pointer to first DVIOP block for
this set of I/O requests
0014 20 Signed 4 SNDMSGID IUCV message id
0018 24 Signed 4 SNDTRGCL IUCV target class
001C 28 Signed 4 * Reserved for future IBM use
0020 32 Dbl-Word 8 SNDIL1IA IUCV *BLOCKIO indirect level-1
operand I-ASIT. This I-ASIT
identifies the address space
containing *BLOCKIO indirect
level-1 operand, the multi-block
parameter list.
0028 40 Address 4 SNDPLADR Address of the multiple block
parameter list in host real
storage
002C 44 Signed 4 SNDPLSIZ Size of the multiple block
parameter list in bytes
0030 48 Signed 2 SNDPLCNT Count of elements in the multiple
block parameter list
0032 50 Signed 2 SNDDBICT Count of DBIRQ blocks sent to
HCPIOS
0034 52 Signed 4 SNDGPLST Guest address of the multiple
block parameter list in host
0038 56 Signed 4 * Reserved for Future IBM Use
003C 60 Signed 4 * Reserved for Future IBM Use
0040 64 Dbl-Word 8 SNDSINGL Storage for a single block I/O
version of the multiple block I/O
parameter list
0048 72 Dbl-Word 8 SNDWORKA (3) Work area for HCPBIM. Since
HCPBIMIN does not have a SAVBK
available, this is to be used as
a scratch area.
0060 96 Dbl-Word 8 * (0) Ensure double word boundary
0060 96 Bitstring 40 SNDPARML IUCV reply parameter list
00000011 SNDSIZE (*-SNDBK+7)/8 Size, in
doublewords, of SNDBK
0018 24 Bitstring 1 * (3)
001B 27 Bitstring 1 SNDBLKIO Blockio service request
1... .... SNDBLKNC X'80' SNDBLKNC Bypass MDC
processing
.... ..11 SNDBLKMB X'03' SNDBLKMB Multi-block
request
.... ..1. SNDBLKRD X'02' SNDBLKRD Single block read
.... ...1 SNDBLKWR X'01' SNDBLKWR Single block write
SNDBLKIO SNDTCMSK X'FFFFFFFF'-(SNDBLKNC+SNDBLKMB)
SNDTCMSK Mask to test for valid
data in the IPTRGCL/SNDTRGCL
fields
Remapping of the work area
Remapping for routine SCHEDULE_IO, while processing
VDISK I/O.
0048 72 Signed 4 SNDTRIED For VDISK DVIOPs whose I/O must
be retried, contains the number
of I/Os already attempted.
004C 76 Bitstring 1 SNDSVVDF Byte to contain saved flag
information for VDISK I/O
processing.
1... .... SNDSVRTY X'80' SNDSVRTY DVIENTRYs must be
retried.
004D 77 Bitstring 1 SNDSVRC Save the error return code for
HCPQDL until the entries whose
I/Os were successful are marked.
004E 78 Bitstring 1 * (2) Reserved for IBM use.
0050 80 Dbl-Word 8 * (2) Reserved for IBM use.
End of work area remapping
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