drivers/scsi/aic7xxx/Kconfig.aic79xx

   1 #
   2 # AIC79XX 2.5.X Kernel configuration File.
   3 # $Id: //depot/linux-aic79xx-2.5.0/drivers/scsi/aic7xxx/Kconfig.aic79xx#4 $
   4 #
   5 config SCSI_AIC79XX
   6         tristate "Adaptec AIC79xx U320 support"
   7         depends on PCI && SCSI
   8         help
   9         This driver supports all of Adaptec's Ultra 320 PCI-X
  10         based SCSI controllers.
  11
  12 config AIC79XX_CMDS_PER_DEVICE
  13         int "Maximum number of TCQ commands per device"
  14         depends on SCSI_AIC79XX
  15         default "32"
  16         ---help---
  17         Specify the number of commands you would like to allocate per SCSI
  18         device when Tagged Command Queueing (TCQ) is enabled on that device.
  19
  20         This is an upper bound value for the number of tagged transactions
  21         to be used for any device.  The aic7xxx driver will automatically
  22         vary this number based on device behavior.  For devices with a
  23         fixed maximum, the driver will eventually lock to this maximum
  24         and display a console message inidicating this value.
  25
  26         Due to resource allocation issues in the Linux SCSI mid-layer, using
  27         a high number of commands per device may result in memory allocation
  28         failures when many devices are attached to the system.  For this reason,
  29         the default is set to 32.  Higher values may result in higer performance
  30         on some devices.  The upper bound is 253.  0 disables tagged queueing.
  31
  32         Per device tag depth can be controlled via the kernel command line
  33         "tag_info" option.  See drivers/scsi/aic7xxx/README.aic79xx
  34         for details.
  35
  36 config AIC79XX_RESET_DELAY_MS
  37         int "Initial bus reset delay in milli-seconds"
  38         depends on SCSI_AIC79XX
  39         default "15000"
  40         ---help---
  41         The number of milliseconds to delay after an initial bus reset.
  42         The bus settle delay following all error recovery actions is
  43         dictated by the SCSI layer and is not affected by this value.
  44
  45         Default: 15000 (15 seconds)
  46
  47 config AIC79XX_BUILD_FIRMWARE
  48         bool "Build Adapter Firmware with Kernel Build"
  49         depends on SCSI_AIC79XX && !PREVENT_FIRMWARE_BUILD
  50         help
  51         This option should only be enabled if you are modifying the firmware
  52         source to the aic79xx driver and wish to have the generated firmware
  53         include files updated during a normal kernel build.  The assembler
  54         for the firmware requires lex and yacc or their equivalents, as well
  55         as the db v1 library.  You may have to install additional packages
  56         or modify the assembler Makefile or the files it includes if your
  57         build environment is different than that of the author.
  58
  59 config AIC79XX_ENABLE_RD_STRM
  60         bool "Enable Read Streaming for All Targets"
  61         depends on SCSI_AIC79XX
  62         default n
  63         help
  64         Read Streaming is a U320 protocol option that should enhance
  65         performance.  Early U320 drive firmware actually performs slower
  66         with read streaming enabled so it is disabled by default.  Read
  67         Streaming can be configured in much the same way as tagged queueing
  68         using the "rd_strm" command line option.  See
  69         drivers/scsi/aic7xxx/README.aic79xx for details.
  70
  71 config AIC79XX_DEBUG_ENABLE
  72         bool "Compile in Debugging Code"
  73         depends on SCSI_AIC79XX
  74         default y
  75         help
  76         Compile in aic79xx debugging code that can be useful in diagnosing
  77         driver errors.
  78
  79 config AIC79XX_DEBUG_MASK
  80         int "Debug code enable mask (16383 for all debugging)"
  81         depends on SCSI_AIC79XX
  82         default "0"
  83         help
  84         Bit mask of debug options that is only valid if the
  85         CONFIG_AIC79XX_DEBUG_ENBLE option is enabled.  The bits in this mask
  86         are defined in the drivers/scsi/aic7xxx/aic79xx.h - search for the
  87         variable ahd_debug in that file to find them.
  88
  89 config AIC79XX_REG_PRETTY_PRINT
  90         bool "Decode registers during diagnostics"
  91         depends on SCSI_AIC79XX
  92         default y
  93         help
  94         Compile in register value tables for the output of expanded register
  95         contents in diagnostics.  This make it much easier to understand debug
  96         output without having to refer to a data book and/or the aic7xxx.reg
  97         file.