AHD(4)

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.