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NAME    [Toc]    [Back]

     mpt - LSI Fusion-MPT  SCSI  and  FibreChannel  host  adapter

SYNOPSIS    [Toc]    [Back]

     mpt* at pci? dev ? function ?
     scsibus* at mpt?

DESCRIPTION    [Toc]    [Back]

     The mpt driver provides support for the LSI Logic Fusion-MPT
family of
     SCSI and Fibre Channel controllers:

           +o   53c1020 (Single Ultra320 SCSI)
           +o   53c1030 (Dual Ultra320 SCSI)
           +o   FC909 (1Gb/s Fibre Channel)
           +o   FC909A (Dual 1Gb/s Fibre Channel)
           +o   FC919 (2Gb/s Fibre Channel)
           +o   FC929 (Dual 2Gb/s Fibre Channel)
           +o   Emulated in VMWare ESX Server 2

     The LSI Logic SCSI and  Fibre  Channel  controllers  contain
firmware that
     presents a multiprotocol service layer based on the LSI Logic Fusion-MPT
     architecture.  The firmware isolates the host  drivers  from
the hardware
     and  controls  the device side of the message passing interface to the host
     device drivers.  The firmware manages all phases of  an  I/O
request and
     optimizes  the interrupt management for the system.  For Fibre Channel,
     the firmware also manages all FC-2  through  FC-4  services,
which minimizes
     the  amount  of  Fibre Channel unique services required with
the host driver.

     The MPI (Message Passing  Interface)  defintion  includes  a
     transport  mechanism  and  a  messaging  protocol.  A system
doorbell and message
 queues define the  MPI  transport  interface.   Inbound
Message Frames
     (MF),  allocated  in host memory, identify I/O operations to
be performed
     by the IO Controller (IOC).  These operations are queued  on
the Request
     Queue  by the host driver.  Outbound Message Frames, also in
host memory,
     track I/O operations as they  complete.   These  frames  are
queued on the
     Reply  Queue  by  the IOC.  A doorbell mechanism is provided
for IOC configuration,
 reset management, and IOC status.

SEE ALSO    [Toc]    [Back]

     cd(4), ch(4), intro(4),  pci(4),  scsi(4),  sd(4),  siop(4),
st(4), uk(4)

HISTORY    [Toc]    [Back]

     The mpt driver first appeared in OpenBSD 3.5.

AUTHORS    [Toc]    [Back]

     The  driver was ported from NetBSD by Milos Urbanek, Kenneth
R. Westerback
     and Marco Peereboom.

OpenBSD     3.6                        February     25,      2004
[ Back ]
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