HP Integrity NonStop H-Series - Manual (Page 27)

Interfacing With the Open SCSI I/O Process (IOP)
Open SCSI for Fibre Channel Controller Integrator’s Manual for HP Integrity NonStop NS-Series Servers—
3- 11
The CAM Control Block (CCB)
CCB Structures
The descriptions of the various CCB structures in this subsection show that the first
field in each of the CCB structures is labeled Address of this CCB. For this field:
•
The IOP does not use this value while executing the operation.
•
The IOP uses this value only for an Abort SCSI Command operation. When
executing an Abort SCSI Command operation, the application or peripheral driver
should place in the Address of CCB to be acted upon field of the Abort SCSI
Command CCB the same value that it originally placed in the Address of this CCB
field of the CCB for the CAM operation it wants to abort. See
Table 3-4 on
page 3-13.
The application or peripheral driver need only ensure that the value in the Address
of this CCB field is unique for all operations it has outstanding in an IOP at any one
time. Then the application or driver can abort this operation if needed.
•
For compatibility with future implementation, the application or peripheral driver
should place into this field the address of the CCB in its own address space.
5 Disable synchronous transfers
1 = Disables
0 = No effect
Yes Supported only with
the Set I/O
Characteristics
operation.
4 SIM queue priority
1 = Priority insert in SIM queue
0 = Normal insert in SIM queue
Yes For restrictions, use,
and implementation,
see
SIM Queue
Operations on
page 3-14.
3 SIM queue freeze No
2 SIM queue unfreeze
1 = Unfreeze SIM queue
0 = No effect
Yes For restrictions, use,
and implementation,
see
SIM Queue
Operations on
page 3-14.
1 Engine synchronize No
0 (Reserved) -
3 7-0 Denote physical versus virtual
address No
4 7-0 Describe target mode attributes No
Table 3-2. Cam-Flag Bits (page 2 of 2)
Flag
Byte
Bits Description
Supported
by Open
SCSI IOP?
Notes