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# AIC79XX 2.5.X Kernel configuration File.
# $Id: //depot/linux-aic79xx-2.5.0/drivers/scsi/aic7xxx/Kconfig.aic79xx#4 $
config SCSI_AIC79XX
tristate "Adaptec AIC79xx U320 support"
depends on PCI && SCSI
This driver supports all of Adaptec's Ultra 320 PCI-X
based SCSI controllers.
int "Maximum number of TCQ commands per device"
depends on SCSI_AIC79XX
default "32"
Specify the number of commands you would like to allocate per SCSI
device when Tagged Command Queueing (TCQ) is enabled on that device.
This is an upper bound value for the number of tagged transactions
to be used for any device. The aic7xxx driver will automatically
vary this number based on device behavior. For devices with a
fixed maximum, the driver will eventually lock to this maximum
and display a console message inidicating this value.
Due to resource allocation issues in the Linux SCSI mid-layer, using
a high number of commands per device may result in memory allocation
failures when many devices are attached to the system. For this reason,
the default is set to 32. Higher values may result in higer performance
on some devices. The upper bound is 253. 0 disables tagged queueing.
Per device tag depth can be controlled via the kernel command line
"tag_info" option. See drivers/scsi/aic7xxx/README.aic79xx
for details.
int "Initial bus reset delay in milli-seconds"
depends on SCSI_AIC79XX
default "15000"
The number of milliseconds to delay after an initial bus reset.
The bus settle delay following all error recovery actions is
dictated by the SCSI layer and is not affected by this value.
Default: 15000 (15 seconds)
bool "Build Adapter Firmware with Kernel Build"
This option should only be enabled if you are modifying the firmware
source to the aic79xx driver and wish to have the generated firmware
include files updated during a normal kernel build. The assembler
for the firmware requires lex and yacc or their equivalents, as well
as the db v1 library. You may have to install additional packages
or modify the assembler Makefile or the files it includes if your
build environment is different than that of the author.
bool "Enable Read Streaming for All Targets"
depends on SCSI_AIC79XX
default n
Read Streaming is a U320 protocol option that should enhance
performance. Early U320 drive firmware actually performs slower
with read streaming enabled so it is disabled by default. Read
Streaming can be configured in much the same way as tagged queueing
using the "rd_strm" command line option. See
drivers/scsi/aic7xxx/README.aic79xx for details.
bool "Compile in Debugging Code"
depends on SCSI_AIC79XX
default y
Compile in aic79xx debugging code that can be useful in diagnosing
driver errors.
int "Debug code enable mask (16383 for all debugging)"
depends on SCSI_AIC79XX
default "0"
Bit mask of debug options that is only valid if the
CONFIG_AIC79XX_DEBUG_ENBLE option is enabled. The bits in this mask
are defined in the drivers/scsi/aic7xxx/aic79xx.h - search for the
variable ahd_debug in that file to find them.
bool "Decode registers during diagnostics"
depends on SCSI_AIC79XX
default y
Compile in register value tables for the output of expanded register
contents in diagnostics. This make it much easier to understand debug
output without having to refer to a data book and/or the aic7xxx.reg