iiop(7)                                                      iiop(7)


       NAME
             iiop - Tricord Intelligent SCSI I/O processor subsystem

       DESCRIPTION
             The Tricord Intelligent I/O processor driver provides a SCSI
             device interface to the following Tricord intelligent SCSI I/O
             processors:  IIOP, EIIOP, ISS.

             An IIOP/EIIOP manages two SCSI buses.  On each SCSI bus, the
             IIOP/EIIOP itself reserves ID 0; therefore, SCSI IDs 1 through
             7 may be used for SCSI devices.

             An ISS manages four SCSI buses.  On each SCSI bus, the ISS
             itself reserves ID 0; therefore, SCSI I's 1 through 7 may be
             used for SCSI devices.

             There are no selectable parameters for the user to configure
             when adding additional IIOP/EIIOP/ISS SCSI I/O processors to
             Tricord PowerFrame models.  Interrupts 17-23 are used for
             these devices and are defined on a slot basis.  Dual port
             memory addresses are defined by the board identifier.  The
             Tricord SCSI I/O processor driver will automatically configure
             additional boards when installed in a PowerFrame machine.

             The Tricord Intelligent I/O Processor driver enables PDI
             compliant target drivers (such as sd01, st01) to communicate
             on the SCSI buses with target controllers and logical units.
             This allows normal access to mass-storage devices using
             standard system interfaces and filesystems.  It is also
             possible for the knowledgeable user to access the SCSI-bus
             subsystem directly by using the driver's pass-through
             interface.  This allows the users to issue sb control blocks
             directly to the SCSI target device.  To find the appropriate
             pass-through device to use for a particular target device, the
             user should open(2) the character special file for the device
             in question and then issue the B_GETDEV ioctl.  The device
             value returned should then be used to create a character
             special file which, when opened, may be used for pass-through
             (SDI_SEND ioctl).

       ioctl Calls
             The following ioctl(2) commands are provided by this driver:

             SDI_SEND
                   Sends a pass-through command (SCSI control block) to a
                   target controller, bypassing the associated target


                           Copyright 1994 Novell, Inc.               Page 1

      iiop(7)                                                      iiop(7)


                  driver.

            B_GETTYPE
                  Returns the bus name (SCSI) and device driver name of
                  the specific device.

            HA_VER
                  Returns a ver_no structure describing this driver.

      FILES
            /usr/include/sys/iiop.h
            /usr/include/sys/scsi.h
            /usr/include/sys/sdi.h
            /usr/include/sys/sdi_edt.h
            /usr/include/sys/sdi_comm.h
            /etc/conf/pack.d/iiop/space.c

      REFERENCES
            ioctl(2), sc01(7), sd01(7), st01(7), sw01(7), ims(7)





























                          Copyright 1994 Novell, Inc.               Page 2