NAME
ahd —
Adaptec 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
ahc(4),
cd(4),
ch(4),
intro(4),
scsi(4),
sd(4),
ses(4),
st(4)
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.