merge changes in FreeBSD.
XXX - supported hardware list is somewhat awful...
This commit is contained in:
soda
parent
0dadd7f429
commit
9c35e2d9d5
@ -1,6 +1,6 @@
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.\" $NetBSD: ahc.4,v 1.13 2000/02/02 19:57:18 augustss Exp $
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.\" $NetBSD: ahc.4,v 1.14 2000/03/21 10:38:24 soda Exp $
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.\"
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.\" Copyright (c) 1995, 1996
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.\" Copyright (c) 1995, 1996, 1997, 1998, 2000
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.\" Justin T. Gibbs. All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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@ -12,7 +12,7 @@
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||||
.\" notice, this list of conditions and the following disclaimer in the
|
||||
.\" documentation and/or other materials provided with the distribution.
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.\" 3. The name of the author may not be used to endorse or promote products
|
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.\" derived from this software withough specific prior written permission.
|
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.\" derived from this software without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
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.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
||||
@ -25,20 +25,20 @@
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||||
.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
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.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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.\"
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.\" $FreeBSD: src/share/man/man4/ahc.4,v 1.22 2000/02/14 16:40:58 gibbs Exp $
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.\"
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.Dd April 20, 1996
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.\".Dt AHC 4 i386
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.\".Os FreeBSD
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.Dd February 13, 2000
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.Dt AHC 4
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.Os
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.\".Os FreeBSD
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.Sh NAME
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.Nm ahc
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.Nd Adaptec VL/EISA/PCI SCSI host adapter driver
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.Nd Adaptec VL/EISA/PCI/CardBus SCSI host adapter driver
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.Sh SYNOPSIS
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.ie 0 \{
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For one or more VL/EISA cards:
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.Cd controller eisa0
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.Cd controller ahc0
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.Cd device eisa
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.Cd device ahc
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\}
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\{For VL cards:
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.Cd ahc0 at isa? port ? irq ?
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@ -48,170 +48,448 @@ For EISA cards:
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.Pp
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.ie 0 \{
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For one or more PCI cards:
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.Cd controller pci0
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.Cd controller ahc0
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.Cd device pci
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.Cd device ahc
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\}
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\{For PCI cards:
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.Cd ahc* at pci? dev ? function ?\}
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.Cd ahc* at pci? dev ? function ?
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.Pp
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\{For CardBus cards:
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For CardBus cards:
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.Cd ahc* at cardbus? dev ? function ?\}
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.Pp
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To enable tagged queueing:
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.Cd options AHC_TAGENABLE
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To allow PCI adapters to use memory mapped I/O if enabled:
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.Cd options AHC_ALLOW_MEMIO
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.Pp
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To enable SCB paging:
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.Cd options AHC_SCBPAGING_ENABLE
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.if 0 \{
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To configure one or more controllers to assume the target role:
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.Cd options AHC_TMODE_ENABLE <bitmask of units>
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.Pp
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\}
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.ie 0 \{
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For one or more
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.Tn SCSI
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busses:
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.Cd controller scbus0 at ahc0
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For one or more SCSI busses:
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.Cd device scbus0 at ahc0
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\}
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\{For
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.Tn SCSI
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busses:
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.Cd scsibus* at ahc?\}
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.Sh DESCRIPTION
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.ie 0 \{
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This driver provides access to the
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.Tn SCSI
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bus connected to an
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.Tn Adaptec
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274x, 284x, 2940, 3940, or controllers based on the
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bus(es) connected to Adaptec
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.Tn AIC7770,
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.Tn AIC7850,
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.Tn AIC7860,
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.Tn AIC7870,
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or
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.Tn AIC7880
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.Tn AIC7880,
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.Tn AIC7890,
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.Tn AIC7891,
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.Tn AIC7892,
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.Tn AIC7895,
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.Tn AIC7896,
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.Tn AIC7897
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and
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.Tn AIC7899
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host adapter chips.
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Features include support for twin and wide busses, ultra
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.Tn SCSI ,
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two active commands at a time per non-tagged queueing target, tagged queuing,
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and SCB paging which allows up to 255 active commands on all adapters
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except those using
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.Tn AIC7770
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chips prior to revision E.
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Tagged queueing is enabled with the
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.Dq Dv AHC_TAGENABLE
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configuration option.
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SCB paging is enabled with the
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.Dq Dv AHC_SCBPAGING_ENABLE
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configuration option.
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These chips are found on many motherboards as well as the following
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Adaptec SCSI controller cards:
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.Tn 274X(W),
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.Tn 274X(T),
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.Tn 284X,
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.Tn 2910,
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.Tn 2915,
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.Tn 2920,
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.Tn 2930C,
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.Tn 2930U2,
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.Tn 2940,
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.Tn 2940U,
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.Tn 2940AU,
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.Tn 2940UW,
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.Tn 2940UW Dual,
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.Tn 2940UW Pro,
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.Tn 2940U2W,
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.Tn 2940U2B,
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.Tn 2950U2W,
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.Tn 2950U2B,
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.Tn 19160B,
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.Tn 29160B,
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.Tn 29160N,
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.Tn 3940,
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.Tn 3940U,
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.Tn 3940AU,
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.Tn 3940UW,
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.Tn 3940AUW,
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.Tn 3940U2W,
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.Tn 3950U2,
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.Tn 3960,
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.Tn 39160,
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.Tn 3985,
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and
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.Tn 4944UW.
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\}
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\{The
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.Nm
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device driver supports
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.Tn SCSI
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controllers based on
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.Tn Adaptec
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.Tn AIC77xx
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and
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.Tn AIC78xx
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.Tn SCSI
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host adapter chips found on many motherboards as well as
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.Tn Adaptec
|
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.Tn SCSI
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controller cards.\}
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.Pp
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Driver features include support for twin and wide busses,
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fast, ultra or ultra2 synchronous transfers depending on controller type,
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.ie 0 \{
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tagged queuing, SCB paging, and target mode.
|
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\}
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\{
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tagged queuing and SCB paging.\}
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.Pp
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Memory mapped I/O can be enabled for PCI devices with the
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.Dq Dv AHC_ALLOW_MEMIO
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configuration option.
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Memory mapped I/O is more efficient than the alternative, programmed I/O.
|
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Most PCI BIOSes will map devices so that either technique for communicating
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with the card is available.
|
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In some cases,
|
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usually when the PCI device is sitting behind a PCI->PCI bridge,
|
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the BIOS may fail to properly initialize the chip for memory mapped I/O.
|
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The typical symptom of this problem is a system hang if memory mapped I/O
|
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is attempted.
|
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Most modern motherboards perform the initialization correctly and work fine
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with this option enabled.
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.Pp
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.if 0 \{
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Individual controllers may be configured to operate in the target role
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through the
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.Dq Dv AHC_TMODE_ENABLE
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configuration option. The value assigned to this option should be a bitmap
|
||||
of all units where target mode is desired.
|
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For example, a value of 0x25, would enable target mode on units 0, 2, and 5.
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.Pp
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\}
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Per target configuration performed in the
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.Tn SCSI-Select
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menu, accesible at boot in
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menu, accessible at boot
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in
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.No non- Ns Tn EISA
|
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models or through an
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models,
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or through an
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.Tn EISA
|
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configuration utility for
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||||
.Tn EISA
|
||||
models,
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||||
is honored by this driver with the stipulation that the
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.Tn BIOS
|
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must be enabled for
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is honored by this driver.
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This includes synchronous/asynchronous transfers,
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maximum synchronous negotiation rate,
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wide transfers,
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disconnection,
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the host adapter's SCSI ID,
|
||||
and,
|
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in the case of
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.Tn EISA
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adaptors.
|
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This includes synchronous/asynchronous transfers, maximum synchronous
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negotiation rate, disconnection, and the host adapter's SCSI ID.
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Twin Channel controllers,
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the primary channel selection.
|
||||
For systems that store non-volatile settings in a system specific manner
|
||||
rather than a serial eeprom directly connected to the aic7xxx controller,
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||||
the
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.Tn BIOS
|
||||
must be enabled for the driver to access this information.
|
||||
This restriction applies to all
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||||
.Tn EISA
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||||
and many motherboard configurations.
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||||
.Pp
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Note that I/O addresses are determined automatically by the probe routines,
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||||
but care should be taken when using a 284x
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.Pq Tn VESA No local bus controller
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||||
in an
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.Tn EISA
|
||||
system.
|
||||
Ensure that the jumpers setting the I/O area for the 284x match the
|
||||
system. The jumpers setting the I/O area for the 284x should match the
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||||
.Tn EISA
|
||||
slot into which the card is inserted to prevent conflicts with other
|
||||
.Tn EISA
|
||||
cards.
|
||||
.Sh HARDWARE
|
||||
Supported cards include:
|
||||
.Pp
|
||||
.Bl -tag -width xxxxxxxxxx -offset indent
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||||
.It AHA-274x
|
||||
.Tn Adaptec
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||||
EISA SCSI adaptor
|
||||
.It AHA-284x
|
||||
.Tn Adaptec
|
||||
VL SCSI adaptor
|
||||
.It AHA-2940
|
||||
.Tn Adaptec
|
||||
PCI SCSI adaptor
|
||||
.It AHA-2940U
|
||||
.Tn Adaptec
|
||||
PCI Ultra SCSI adaptor
|
||||
.It AHA-2940AU
|
||||
.Tn Adaptec
|
||||
PCI Ultra SCSI adaptor
|
||||
.It AHA-2944
|
||||
.Tn Adaptec
|
||||
PCI SCSI adaptor
|
||||
.It AHA-2944U
|
||||
.Tn Adaptec
|
||||
PCI SCSI adaptor
|
||||
.It AHA-3940
|
||||
.Tn Adaptec
|
||||
PCI dual bus SCSI adaptor
|
||||
.It AHA-3940U
|
||||
.Tn Adaptec
|
||||
PCI dual bus Ultra SCSI adaptor
|
||||
.It Other
|
||||
EISA SCSI adaptors based on the
|
||||
.Tn Adaptec
|
||||
.Tn AIC-7770
|
||||
.It Other
|
||||
PCI controllers based on the
|
||||
.Tn AIC-7850,
|
||||
.Tn AIC-7855,
|
||||
.Tn AIC-7860,
|
||||
.Tn AIC-7870,
|
||||
or
|
||||
.Tn AIC-7880
|
||||
Performance and feature sets vary throughout the aic7xxx product line.
|
||||
The following table provides a comparison of the different chips supported
|
||||
by the
|
||||
.Nm
|
||||
driver. Note that wide and twin channel features, although always supported
|
||||
by a particular chip, may be disabled in a particular motherboard or card
|
||||
design.
|
||||
.Pp
|
||||
.Bd -filled -offset indent
|
||||
.Bl -column "aic7770 " "10 " "EISA/VL " "10MHz " "16bit " "SCBs " Features
|
||||
.Em "Chip MIPS Bus MaxSync MaxWidth SCBs Features"
|
||||
aic7770 10 EISA/VL 10MHz 16Bit 4 1
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||||
aic7850 10 PCI/32 10MHz 8Bit 3
|
||||
aic7860 10 PCI/32 20MHz 8Bit 3
|
||||
aic7870 10 PCI/32 10MHz 16Bit 16
|
||||
aic7880 10 PCI/32 20MHz 16Bit 16
|
||||
aic7890 20 PCI/32 40MHz 16Bit 16 3 4 5 6 7 8
|
||||
aic7891 20 PCI/64 40MHz 16Bit 16 3 4 5 6 7 8
|
||||
aic7892 20 PCI/64 80MHz 16Bit 16 3 4 5 6 7 8
|
||||
aic7895 15 PCI/32 20MHz 16Bit 16 2 3 4 5
|
||||
aic7895C 15 PCI/32 20MHz 16Bit 16 2 3 4 5 8
|
||||
aic7896 20 PCI/32 40MHz 16Bit 16 2 3 4 5 6 7 8
|
||||
aic7897 20 PCI/64 40MHz 16Bit 16 2 3 4 5 6 7 8
|
||||
aic7899 20 PCI/64 80MHz 16Bit 16 2 3 4 5 6 7 8
|
||||
.El
|
||||
.Pp
|
||||
.Bl -enum -compact
|
||||
.It
|
||||
Multiplexed Twin Channel Device - One controller servicing two busses.
|
||||
.It
|
||||
Multi-function Twin Channel Device - Two controllers on one chip.
|
||||
.It
|
||||
Command Channel Secondary DMA Engine - Allows scatter gather list and
|
||||
SCB prefetch.
|
||||
.It
|
||||
64 Byte SCB Support - SCSI CDB is embedded in the SCB to eliminate an extra DMA.
|
||||
.It
|
||||
Block Move Instruction Support - Doubles the speed of certain sequencer
|
||||
operations.
|
||||
.It
|
||||
.Sq Bayonet
|
||||
style Scatter Gather Engine - Improves S/G prefetch performance.
|
||||
.It
|
||||
Queuing Registers - Allows queuing of new transactions without pausing the
|
||||
sequencer.
|
||||
.It
|
||||
Multiple Target IDs - Allows the controller to respond to selection as a
|
||||
target on multiple SCSI IDs.
|
||||
.El
|
||||
.Ed
|
||||
.Pp
|
||||
|
||||
.Sh HARDWARE
|
||||
Supported
|
||||
.Tn SCSI
|
||||
controllers include:
|
||||
.Pp
|
||||
.Bl -item -offset indent
|
||||
.It
|
||||
.Tn Adaptec AHA-2742W
|
||||
EISA Fast Wide SCSI adapter
|
||||
.It
|
||||
.Tn Adaptec AHA-274xAT
|
||||
EISA dual channel Fast SCSI adapter
|
||||
.It
|
||||
.Tn Adaptec AHA-284x
|
||||
VL Fast SCSI adapter
|
||||
.It
|
||||
.Tn Adaptec AHA-2910
|
||||
PCI Fast SCSI adapter (no SCSI BIOS)
|
||||
.It
|
||||
.Tn Adaptec AHA-2915
|
||||
PCI Fast SCSI adapter (no SCSI BIOS)
|
||||
.It
|
||||
.Tn Adaptec AHA-2920
|
||||
PCI Fast SCSI adapter
|
||||
.It
|
||||
.Tn Adaptec AHA-2930C
|
||||
PCI Ultra SCSI adapter
|
||||
.It
|
||||
.Tn Adaptec AHA-2930U2
|
||||
PCI Ultra2 Wide LVD SCSI adapter
|
||||
.It
|
||||
.Tn Adaptec AHA-2940
|
||||
PCI Fast SCSI adapter
|
||||
.It
|
||||
.Tn Adaptec AHA-2940U
|
||||
PCI Ultra SCSI adapter
|
||||
.It
|
||||
.Tn Adaptec AHA-2940AU
|
||||
PCI Ultra SCSI adapter
|
||||
.It
|
||||
.Tn Adaptec AHA-2940UW
|
||||
PCI Ultra Wide SCSI adapter
|
||||
.It
|
||||
.Tn Adaptec AHA-2940UW Dual
|
||||
PCI dual channel Ultra Wide SCSI adapter
|
||||
.It
|
||||
.Tn Adaptec AHA-2940UW Pro
|
||||
PCI Ultra Wide SCSI adapter
|
||||
.It
|
||||
.Tn Adaptec AHA-2940U2W
|
||||
PCI Ultra2 Wide LVD SCSI adapter
|
||||
.It
|
||||
.Tn Adaptec AHA-2940U2B
|
||||
PCI Ultra2 Wide LVD SCSI adapter
|
||||
.It
|
||||
.Tn Adaptec AHA-2944W
|
||||
PCI Fast Wide Differential SCSI adapter
|
||||
.It
|
||||
.Tn Adaptec AHA-2944UW
|
||||
PCI Ultra Wide Differential SCSI adapter
|
||||
.It
|
||||
.Tn Adaptec AHA-2950U2W
|
||||
.It
|
||||
.Tn Adaptec AHA-2950U2B
|
||||
64bit PCI Ultra2 Wide LVD SCSI adapter
|
||||
.It
|
||||
.Tn Adaptec AHA-19160B
|
||||
PCI Ultra160 Wide LVD SCSI adapter
|
||||
.It
|
||||
.Tn Adaptec AHA-29160N
|
||||
PCI Ultra160 Wide LVD SCSI adapter
|
||||
.It
|
||||
.Tn Adaptec AHA-29160B
|
||||
64bit PCI Ultra160 Wide LVD SCSI adapter
|
||||
.It
|
||||
.Tn Adaptec AHA-3940
|
||||
PCI dual channel Fast SCSI adapter
|
||||
.It
|
||||
.Tn Adaptec AHA-3940U
|
||||
PCI dual channel Ultra SCSI adapter
|
||||
.It
|
||||
.Tn Adaptec AHA-3940AU
|
||||
PCI dual channel Ultra SCSI adapter
|
||||
.It
|
||||
.Tn Adaptec AHA-3940UW
|
||||
PCI dual channel Ultra Wide SCSI adapter
|
||||
.It
|
||||
.Tn Adaptec AHA-3940AUW
|
||||
PCI dual channel Ultra Wide SCSI adapter
|
||||
.It
|
||||
.Tn Adaptec AHA-3940U2W
|
||||
PCI dual channel Ultra2 Wide LVD SCSI adapter
|
||||
.It
|
||||
.Tn Adaptec AHA-3950U2
|
||||
64bit PCI dual channel Ultra2 Wide LVD SCSI adapter
|
||||
.It
|
||||
.Tn Adaptec AHA-3960
|
||||
64bit PCI dual channel Ultra160 Wide LVD SCSI adapter
|
||||
.It
|
||||
.Tn Adaptec AHA-3985
|
||||
PCI dual channel Fast SCSI RAID adapter
|
||||
.It
|
||||
.Tn Adaptec AHA-39160
|
||||
64bit PCI dual channel Ultra160 Wide LVD SCSI adapter
|
||||
.It
|
||||
.Tn Adaptec AHA-4944UW
|
||||
PCI quad channel PCI Ultra Wide Differential SCSI adapter
|
||||
.It
|
||||
Other SCSI controllers based on the
|
||||
.Tn Adaptec
|
||||
.Tn AIC7770,
|
||||
.Tn AIC7850,
|
||||
.Tn AIC7860,
|
||||
.Tn AIC7870,
|
||||
.Tn AIC7880,
|
||||
.Tn AIC7890,
|
||||
.Tn AIC7891,
|
||||
.Tn AIC7892,
|
||||
.Tn AIC7895,
|
||||
.Tn AIC7896,
|
||||
.Tn AIC7897
|
||||
and
|
||||
.Tn AIC7899
|
||||
.Tn SCSI
|
||||
host adapter chips.
|
||||
.El
|
||||
|
||||
.Sh SCSI CONTROL BLOCKS (SCBs)
|
||||
Every transaction sent to a device on the SCSI bus is assigned a
|
||||
.Sq SCSI Control Block
|
||||
(SCB). The SCB contains all of the information required by the
|
||||
controller to process a transaction. The chip feature table lists
|
||||
the number of SCBs that can be stored in on-chip memory. All chips
|
||||
with model numbers greater than or equal to 7870 allow for the on chip
|
||||
SCB space to be augmented with external SRAM up to a maximum of 255 SCBs.
|
||||
Very few Adaptec controller configurations have external SRAM.
|
||||
.Pp
|
||||
If external SRAM is not available, SCBs are a limited resource.
|
||||
Using the SCBs in a straight forward manner would only allow the dirver to
|
||||
handle as many concurrent transactions as there are physical SCBs.
|
||||
To fully utilize the SCSI bus and the devices on it,
|
||||
requires much more concurrency.
|
||||
The solution to this problem is
|
||||
.Em SCB Paging ,
|
||||
a concept similar to memory paging. SCB paging takes advantage of
|
||||
the fact that devices usually disconnect from the SCSI bus for long
|
||||
periods of time without talking to the controller. The SCBs
|
||||
for disconnected transactions are only of use to the controller
|
||||
when the transfer is resumed. When the host queues another transaction
|
||||
for the controller to execute, the controller firmware will use a
|
||||
free SCB if one is available. Otherwise, the state of the most recently
|
||||
disconnected (and therefor most likely to stay disconnected) SCB is
|
||||
saved, via dma, to host memory, and the local SCB reused to start
|
||||
the new transaction. This allows the controller to queue up to
|
||||
255 transactions regardless of the amount of SCB space. Since the
|
||||
local SCB space serves as a cache for disconnected transactions, the
|
||||
more SCB space available, the less host bus traffic consumed saving
|
||||
and restoring SCB data.
|
||||
.Sh BUGS
|
||||
Some
|
||||
.Tn Quantum
|
||||
drives (at least the Empire 2100 and 1080s) will not run on an
|
||||
.Tn AIC7870
|
||||
Rev B in synchronous mode at 10MHz.
|
||||
Controllers with this problem have a 42 MHz clock crystal on them
|
||||
and run slightly above 10MHz, causing the drive much confusion.
|
||||
Setting a maximum synchronous negotiation rate of 8MHz in the
|
||||
Rev B in synchronous mode at 10MHz. Controllers with this problem have a
|
||||
42 MHz clock crystal on them and run slightly above 10MHz. This confuses
|
||||
the drive and hangs the bus. Setting a maximum synchronous negotiation rate
|
||||
of 8MHz in the
|
||||
.Tn SCSI-Select
|
||||
utility will allow normal function.
|
||||
.if 1 \{
|
||||
utility will allow normal operation.
|
||||
.Pp
|
||||
.Tn SCSI
|
||||
residual handling is not complete on
|
||||
.Nx
|
||||
version of this driver.
|
||||
Double Transition clocking is not yet supported for Ultra160 controllers.
|
||||
This limits these controllers to 40MHz or 80MB/s.
|
||||
.Pp
|
||||
.ie 0 \{
|
||||
Although the Ultra2 and Ultra160 products have sufficient instruction
|
||||
ram space to support both the initiator and target roles concurrently,
|
||||
this configuration is disabled in favor of allowing the target role
|
||||
to respond on multiple target ids. A method for configuring dual
|
||||
role mode should be provided.
|
||||
.Pp
|
||||
Tagged Queuing is not supported in target mode.
|
||||
.Pp
|
||||
Reselection in target mode fails to function correctly on all high
|
||||
voltage differential boards as shipped by Adaptec. Information on
|
||||
how to modify HVD board to work correctly in target mode is available
|
||||
from Adaptec.
|
||||
\}
|
||||
\{Target mode is not supported on
|
||||
.Nx
|
||||
version of this driver.\}
|
||||
.Sh SEE ALSO
|
||||
.Xr intro 4 ,
|
||||
.ie 0 \{
|
||||
.Xr aha 4 ,
|
||||
.Xr ahb 4 ,
|
||||
.Xr cd 4 ,
|
||||
.Xr da 4 ,
|
||||
.Xr sa 4 ,
|
||||
.Xr scsi 4
|
||||
\}
|
||||
\{
|
||||
.Xr cd 4 ,
|
||||
.Xr ch 4 ,
|
||||
.Xr scsi 4 ,
|
||||
.Xr sd 4 ,
|
||||
.Xr st 4
|
||||
.Sh AUTHOR
|
||||
.Xr st 4\}
|
||||
.Sh AUTHORS
|
||||
The
|
||||
.Nm
|
||||
driver was written by Justin Gibbs.
|
||||
The
|
||||
driver, the
|
||||
.Tn AIC7xxx
|
||||
sequencer-code assembler was written by John Aycock.
|
||||
sequencer-code assembler,
|
||||
and the firmware running on the aic7xxx chips was written by
|
||||
.An Justin T. Gibbs .
|
||||
.Nx
|
||||
porting is done by Stefan Grefen, Charles M. Hannum,
|
||||
Michael Graff, Jason R. Thorpe, Pete Bentley and Noriyuki Soda.
|
||||
Michael Graff, Jason R. Thorpe, Pete Bentley,
|
||||
Frank van der Linden and Noriyuki Soda.
|
||||
.Sh HISTORY
|
||||
The
|
||||
.Nm
|
||||
driver appeared in
|
||||
.Fx 2.1
|
||||
.Fx 2.0
|
||||
and
|
||||
.Nx 1.1 .
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user