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:
0x0001
Show miscellaneous information
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.