BFP(4) BSD Programmer's Manual BFP(4)NAMEbfp - Buslogic Flashpoint SCSI host adapter driver
SYNOPSIS
bfp0 at pci?
DESCRIPTION
The bfp driver is a software interface to the Buslogic Flashpoint line of
SCSI host bus adapters.
The bfp driver is designed to be used as a machine-dependent back end for
machine-independent SCSI pseudo-devices (see sd(4), sg(4), st(4)).
Booting from a SCSI disk attached to host bus adapters supported by this
driver is done via generic BIOS boot code.
CONFIGURATION
Host bus adapters supported by this driver are located using standard PCI
addressing. It is not necessary to supply a port address for these de-
vices. irq is retrieved from the PCI configuration registers on the
board. It is important to have this driver configured before other
drivers which can select an irq.
BOOT PARAMETERS
There are now parameters which are configurable from boot(8) with the
-parm command. Typically these commands would be added to boot.default(5)
though they can be set at the ``boot:'' prompt.
Many of the parameters take as an argument one or more target ids. The
following are permissible arguments to these parameters:
t0 target 0.
target0 target 0.
t1 target 1.
target1 target 1.
t2 target 2.
target2 target 2.
.
.
.
t14 target 14
target14 target 14
t15 target 15
target15 target 15
all targets 0 through 15
none no targets
The following parameters take a list of target specifiers as an argu-
ment(s):
single_lun
For these targets only look at lun 0.
-parm bfp* single_lun=none #default
-parm bfp* single_lun=all
skip_targets
These targets will not be probed at boot. Examples:
-parm bfp* skip_targets=none #default
-parm bfp0 skip_targets=target5 #Don't probe target 5
tags These targets will use tag queueing if supported by the
target. See sd(4) for caveats on its use. Examples:
-parm bfp* tags=none #default
-parm bfp1 tags=all-t1 #all but target 1
The following parameter takes a numeric value as an argument:
reset_delay
This is used to control the number of seconds of delay
which is inserted after the SCSI bus is reset at boot time.
-parm bfp* reset_delay=5 #default
-parm bfp* reset_delay=1 #1 second reset delay
-parm bfp* reset_delay=0 #no delay after reset
BSDI BSD/OS September 4, 1996 2
