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_PRINTFor 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.