Programming Interface Information:
This information is NOT intended to be used as Programming Interfaces of z/VM. |
SCQBK
Control Block Contents
SCQBK DSECT
Cross Reference (Contains links to field and bit definitions)
SCQBK Prolog
NAME : HCPSCQBK DESCRIPTION: Native SCSI Container QDIO Control Block DSECT : SCQBK FUNCTION : SCQBK maps the IN/OUT data structs for passing values between the Native SCSI Container and the QDIO RDEV. LOCATED BY : RDEVQDBK SERIALIZED : RDEV Lock CREATED BY : Dynamically created by HCPGETST when the third PSIO_startCCW call is made to activate the QDIO Queues for the Native SCSI Container. DELETED BY : Deleted by HCPRELST when a QDIO error condition occurs, i.e the RDEV comes out of the QDIO Active state.
SCQBK Control Block Content
SCQBK DSECT
Hex Dec Type/Val Lng Label (dup) Comments ---- ---- --------- ---- -------------- -------- 0000 0 Structure SCQBK Native SCSI Container QDIO Control 0000 0 Address 8 SCQDATIN (8) 0000 0 Address 8 SCQINTST (2) ccw_vector_zct for normal_int_status 0010 16 Address 8 SCQCMPST (2) ccw_vector_zct for normal_completion 0020 32 Address 8 SCQTHST (2) ccw_vector_zct for other_status 0030 48 Address 8 SCQCCW ptr to private_ccw_zct CCW and IDAW [IN] 0038 56 Address 8 SCQIORBK ptr to QDIO Activate IORBK [IN] 0040 64 Bitstring 64 SCQIRB (0) Interrupt Response Block [OUT] 0040 64 Bitstring 12 SCQSCSW SCSW [OUT] 004C 76 Bitstring 52 SCQEXLO Extended Logout Area [OUT] 0080 128 Bitstring 1 SCQSTATE QDIO Status [OUT] .... 1... SCQISTAT X'08' Value for Intermediate status. .... .1.. SCQPSTAT X'04' Value for Primary status. .... ...1 SCQOTHST X'01' Value for Other status. 0081 129 Bitstring 1 SCQDEND (0) End of Native SCSI Container QDIO CB 00000081 SCQBYTSZ (SCQDEND-SCQBK) size in bytes 00000011 SCQSIZE (SCQDEND-SCQBK+7)/8 size in doublewords
SCQBK Storage Layout
*** SCQBK - Native SCSI Container QDIO Control * * +-------------------------------------------------------+ * 0 | | * = SCQDATIN = * | | * +-------------------------------------------------------+ * 40 * *** SCQBK - Native SCSI Container QDIO Control *** Overlay for SCQDATIN in SCQBK * * +-------------------------------------------------------+ * 0 | SCQINTST | * | | * +-------------------------------------------------------+ * 10 | SCQCMPST | * | | * +-------------------------------------------------------+ * 20 | SCQTHST | * | | * +-------------------------------------------------------+ * 30 | SCQCCW | * +-------------------------------------------------------+ * 38 | SCQIORBK | * +-------------------------------------------------------+ * 40 | SCQSCSW | * | +---------------------------+ * | | | * +---------------------------+ | * 50 | | * = SCQEXLO = * | | * +------+------------------------------------------------+ * 80 |:STATE| * +------+ * *** Overlay for SCQDATIN in SCQBK
SCQBK Cross Reference
Symbol Dspl Value -------------- ---- ----- SCQBYTSZ 0081 00000081 SCQCCW 0030 SCQCMPST 0010 SCQDATIN 0000 SCQDEND 0081 SCQEXLO 004C SCQINTST 0000 SCQIORBK 0038 SCQIRB 0040 SCQISTAT 0080 08 SCQOTHST 0080 01 SCQPSTAT 0080 04 SCQSCSW 0040 SCQSIZE 0081 00000011 SCQSTATE 0080 SCQTHST 0020
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