AHD(4) Kernel Interfaces Manual AHD(4)
NAME
ahdAdaptec PCI/PCI-X Ultra320 SCSI host adapter driver
SYNOPSIS
For one or more PCI/PCI-X cards:
ahd* at pci? dev ? function ?
 
To compile in debugging code:
options AHD_DEBUG
options AHD_DEBUG_OPTS=<bitmask of options>
options AHD_REG_PRETTY_PRINT
 
For SCSI busses:
scsibus* at ahd?
DESCRIPTION
This driver provides access to the SCSI bus(ses) connected to Adaptec AIC79xx host adapter chips.
 
Driver features include support for narrow and wide busses, fast, ultra, ultra2, ultra160, and ultra320 synchronous transfers, packetized transfers, tagged queueing, and 512 SCBs.
 
The AHD_DEBUG_OPTS option is used to control which diagnostic messages are printed to the console when AHD_DEBUG is enabled. Logically OR the following bits together:
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
 
The 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.
HARDWARE
The ahd driver supports the following:
 
Adaptec AIC7901 host adapter chip
Adaptec AIC7901A host adapter chip
Adaptec AIC7902 host adapter chip
Adaptec 29320 host adapter
Adaptec 39320 host adapter
Many motherboards with on-board SCSI support
SEE ALSO
HISTORY
The ahd driver first appeared in FreeBSD 4.7 and NetBSD 2.0.
AUTHORS
The ahd driver, the AIC7xxx sequencer-code assembler, and the firmware running on the aic79xx chips was written by Justin T. Gibbs. NetBSD porting is done by Pascal Renauld, Frank van der Linden, Jason Thorpe, and Allen Briggs. This manual page is based on the ahc(4) manual page.