Copyright (c) 1995, 1996, 1997, 1998, 2000
Justin T. Gibbs. All rights reserved.
Copyright (c) 2002
Scott Long. All rights reserved.
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$FreeBSD: /repoman/r/ncvs/src/share/man/man4/ahd.4,v 1.5 2004/07/04 14:17:41 simon Exp $
.Dd July 4, 2004 .Dt AHD 4 .Os .Sh NAME .Nm ahd .Nd Adaptec PCI/PCI-X Ultra320 SCSI host adapter driver .Sh SYNOPSIS For one or more PCI/PCI-X cards: .Bd -ragged -offset indent -compact
.Cd "ahd* at pci? dev ? function ?"
p To compile in debugging code: d -ragged -offset indent -compact .Cd options AHD_DEBUG .Cd options AHD_DEBUG_OPTS=<bitmask of options> .Cd options AHD_REG_PRETTY_PRINT .Ed
p To configure one or more controllers to assume the target role: d -ragged -offset indent -compact .Cd options AHD_TMODE_ENABLE=<bitmask of units> .Ed
p \} For one or more .Tn SCSI busses: d -ragged -offset indent -compact .Cd device scbus .Ed \} \{For .Tn SCSI busses: .Cd scsibus* at ahd?\} .Sh DESCRIPTION This driver provides access to the .Tn SCSI bus(ses) connected to Adaptec .Tn AIC79xx host adapter chips.
p Driver features include support for narrow and wide busses, fast, ultra, ultra2, ultra160, and ultra320 synchronous transfers, packetized transfers, tagged queueing, \} \{and 512 SCBs.\}
p The .Dv AHD_DEBUG_OPTS option is used to control which diagnostic messages are printed to the console when .Dv AHD_DEBUG is enabled. Logically OR the following bits together: l -column -offset indent Value Function .Em "Value Function" 0x0001 Show miscellaneous information 0x0002 Show sense data 0x0004 Show Serial EEPROM contents 0x0008 Show bus termination settings 0x0010 Show host memory usage 0x0020 Show SCSI protocol messages 0x0040 Show mode pointer of the chip register window 0x0080 Show selection timeouts 0x0100 Show FIFO usage messages 0x0200 Show Queue Full status 0x0400 Show SCB queue status 0x0800 Show inbound packet information 0x1000 Show S/G list information 0x2000 Enable extra diagnostic code in the firmware .El
p The .Dv AHD_REG_PRETTY_PRINT option compiles in support for human-readable bit definitions for each register that is printed by the debugging code. However, it also bloats the compiled size of the driver by approximately 215KB.
p Individual controllers may be configured to operate in the target role through the .Dv AHD_TMODE_ENABLE configuration option. The value assigned to this option should be a bitmap of all units where target mode is desired. For example, a value of 0x25 would enable target mode on units 0, 2, and 5. Note that target mode is only supported for ultra160 speeds and below.
p Per target configuration performed in the .Tn SCSI-Select menu, accessible at boot, is honored by this driver. This includes synchronous/asynchronous transfers, maximum synchronous negotiation rate, wide transfers, disconnection, and the host adapter's .Tn SCSI ID. \} .Sh HARDWARE The .Nm driver supports the following:
p
l -bullet -compact t Adaptec
.Tn AIC7901
host adapter chip
t Adaptec
.Tn AIC7901A
host adapter chip
t Adaptec
.Tn AIC7902
host adapter chip
t Adaptec
.Tn 29320
host adapter
t Adaptec
.Tn 39320
host adapter
t Many motherboards with on-board
.Tn SCSI
support
.El
.Sh SEE ALSO
.Xr ahc 4 ,
.Xr cd 4 ,
.Xr ch 4 ,
.Xr da 4 ,
.Xr intro 4 ,
.Xr sa 4 ,
.Xr scsi 4
.Xr sd 4 ,
.Xr ses 4 ,
.Xr st 4
.Sh HISTORY
The
.Nm
driver first appeared in
.Fx 4.7
and
.Nx 2.0 .
.Sh AUTHORS
The
.Nm
driver, the
.Tn AIC7xxx
sequencer-code assembler,
and the firmware running on the aic79xx chips was written by
.An Justin T. Gibbs .
.Nx
porting is done by Pascal Renauld, Frank van der Linden,
Jason Thorpe, and Allen Briggs.
This manual page is based on the
.Xr ahc 4
manual page.
.Sh BUGS
The current generation of 79xx chips do not support target mode in Ultra320
mode.
Target mode in general has not been well tested in this driver.
\}
Indexes created Mon Oct 20 20:10:13 GMT 2025