AHD(4) | Device Drivers Manual | AHD(4) |
ahd
—
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?
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.
ahd
driver supports the following:
ahd
driver first appeared in
FreeBSD 4.7 and NetBSD 2.0.
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.
May 16, 2009 | NetBSD 9.4 |