linux/Documentation/scsi/BusLogic.rst
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   1.. SPDX-License-Identifier: GPL-2.0
   2
   3=========================================================
   4BusLogic MultiMaster and FlashPoint SCSI Driver for Linux
   5=========================================================
   6
   7                         Version 2.0.15 for Linux 2.0
   8
   9                         Version 2.1.15 for Linux 2.1
  10
  11                              PRODUCTION RELEASE
  12
  13                                17 August 1998
  14
  15                               Leonard N. Zubkoff
  16
  17                               Dandelion Digital
  18
  19                               lnz@dandelion.com
  20
  21         Copyright 1995-1998 by Leonard N. Zubkoff <lnz@dandelion.com>
  22
  23
  24Introduction
  25============
  26
  27BusLogic, Inc. designed and manufactured a variety of high performance SCSI
  28host adapters which share a common programming interface across a diverse
  29collection of bus architectures by virtue of their MultiMaster ASIC technology.
  30BusLogic was acquired by Mylex Corporation in February 1996, but the products
  31supported by this driver originated under the BusLogic name and so that name is
  32retained in the source code and documentation.
  33
  34This driver supports all present BusLogic MultiMaster Host Adapters, and should
  35support any future MultiMaster designs with little or no modification.  More
  36recently, BusLogic introduced the FlashPoint Host Adapters, which are less
  37costly and rely on the host CPU, rather than including an onboard processor.
  38Despite not having an onboard CPU, the FlashPoint Host Adapters perform very
  39well and have very low command latency.  BusLogic has recently provided me with
  40the FlashPoint Driver Developer's Kit, which comprises documentation and freely
  41redistributable source code for the FlashPoint SCCB Manager.  The SCCB Manager
  42is the library of code that runs on the host CPU and performs functions
  43analogous to the firmware on the MultiMaster Host Adapters.  Thanks to their
  44having provided the SCCB Manager, this driver now supports the FlashPoint Host
  45Adapters as well.
  46
  47My primary goals in writing this completely new BusLogic driver for Linux are
  48to achieve the full performance that BusLogic SCSI Host Adapters and modern
  49SCSI peripherals are capable of, and to provide a highly robust driver that can
  50be depended upon for high performance mission critical applications.  All of
  51the major performance features can be configured from the Linux kernel command
  52line or at module initialization time, allowing individual installations to
  53tune driver performance and error recovery to their particular needs.
  54
  55The latest information on Linux support for BusLogic SCSI Host Adapters, as
  56well as the most recent release of this driver and the latest firmware for the
  57BT-948/958/958D, will always be available from my Linux Home Page at URL
  58"http://sourceforge.net/projects/dandelion/".
  59
  60Bug reports should be sent via electronic mail to "lnz@dandelion.com".  Please
  61include with the bug report the complete configuration messages reported by the
  62driver and SCSI subsystem at startup, along with any subsequent system messages
  63relevant to SCSI operations, and a detailed description of your system's
  64hardware configuration.
  65
  66Mylex has been an excellent company to work with and I highly recommend their
  67products to the Linux community.  In November 1995, I was offered the
  68opportunity to become a beta test site for their latest MultiMaster product,
  69the BT-948 PCI Ultra SCSI Host Adapter, and then again for the BT-958 PCI Wide
  70Ultra SCSI Host Adapter in January 1996.  This was mutually beneficial since
  71Mylex received a degree and kind of testing that their own testing group cannot
  72readily achieve, and the Linux community has available high performance host
  73adapters that have been well tested with Linux even before being brought to
  74market.  This relationship has also given me the opportunity to interact
  75directly with their technical staff, to understand more about the internal
  76workings of their products, and in turn to educate them about the needs and
  77potential of the Linux community.
  78
  79More recently, Mylex has reaffirmed the company's interest in supporting the
  80Linux community, and I am now working on a Linux driver for the DAC960 PCI RAID
  81Controllers.  Mylex's interest and support is greatly appreciated.
  82
  83Unlike some other vendors, if you contact Mylex Technical Support with a
  84problem and are running Linux, they will not tell you that your use of their
  85products is unsupported.  Their latest product marketing literature even states
  86"Mylex SCSI host adapters are compatible with all major operating systems
  87including: ... Linux ...".
  88
  89Mylex Corporation is located at 34551 Ardenwood Blvd., Fremont, California
  9094555, USA and can be reached at 510/796-6100 or on the World Wide Web at
  91http://www.mylex.com.  Mylex HBA Technical Support can be reached by electronic
  92mail at techsup@mylex.com, by Voice at 510/608-2400, or by FAX at 510/745-7715.
  93Contact information for offices in Europe and Japan is available on the Web
  94site.
  95
  96
  97Driver Features
  98===============
  99
 100Configuration Reporting and Testing
 101-----------------------------------
 102
 103  During system initialization, the driver reports extensively on the host
 104  adapter hardware configuration, including the synchronous transfer parameters
 105  requested and negotiated with each target device.  AutoSCSI settings for
 106  Synchronous Negotiation, Wide Negotiation, and Disconnect/Reconnect are
 107  reported for each target device, as well as the status of Tagged Queuing.
 108  If the same setting is in effect for all target devices, then a single word
 109  or phrase is used; otherwise, a letter is provided for each target device to
 110  indicate the individual status.  The following examples
 111  should clarify this reporting format:
 112
 113    Synchronous Negotiation: Ultra
 114
 115      Synchronous negotiation is enabled for all target devices and the host
 116      adapter will attempt to negotiate for 20.0 mega-transfers/second.
 117
 118    Synchronous Negotiation: Fast
 119
 120      Synchronous negotiation is enabled for all target devices and the host
 121      adapter will attempt to negotiate for 10.0 mega-transfers/second.
 122
 123    Synchronous Negotiation: Slow
 124
 125      Synchronous negotiation is enabled for all target devices and the host
 126      adapter will attempt to negotiate for 5.0 mega-transfers/second.
 127
 128    Synchronous Negotiation: Disabled
 129
 130      Synchronous negotiation is disabled and all target devices are limited to
 131      asynchronous operation.
 132
 133    Synchronous Negotiation: UFSNUUU#UUUUUUUU
 134
 135      Synchronous negotiation to Ultra speed is enabled for target devices 0
 136      and 4 through 15, to Fast speed for target device 1, to Slow speed for
 137      target device 2, and is not permitted to target device 3.  The host
 138      adapter's SCSI ID is represented by the "#".
 139
 140    The status of Wide Negotiation, Disconnect/Reconnect, and Tagged Queuing
 141    are reported as "Enabled", Disabled", or a sequence of "Y" and "N" letters.
 142
 143Performance Features
 144--------------------
 145
 146  BusLogic SCSI Host Adapters directly implement SCSI-2 Tagged Queuing, and so
 147  support has been included in the driver to utilize tagged queuing with any
 148  target devices that report having the tagged queuing capability.  Tagged
 149  queuing allows for multiple outstanding commands to be issued to each target
 150  device or logical unit, and can improve I/O performance substantially.  In
 151  addition, BusLogic's Strict Round Robin Mode is used to optimize host adapter
 152  performance, and scatter/gather I/O can support as many segments as can be
 153  effectively utilized by the Linux I/O subsystem.  Control over the use of
 154  tagged queuing for each target device as well as individual selection of the
 155  tagged queue depth is available through driver options provided on the kernel
 156  command line or at module initialization time.  By default, the queue depth
 157  is determined automatically based on the host adapter's total queue depth and
 158  the number, type, speed, and capabilities of the target devices found.  In
 159  addition, tagged queuing is automatically disabled whenever the host adapter
 160  firmware version is known not to implement it correctly, or whenever a tagged
 161  queue depth of 1 is selected.  Tagged queuing is also disabled for individual
 162  target devices if disconnect/reconnect is disabled for that device.
 163
 164Robustness Features
 165-------------------
 166
 167  The driver implements extensive error recovery procedures.  When the higher
 168  level parts of the SCSI subsystem request that a timed out command be reset,
 169  a selection is made between a full host adapter hard reset and SCSI bus reset
 170  versus sending a bus device reset message to the individual target device
 171  based on the recommendation of the SCSI subsystem.  Error recovery strategies
 172  are selectable through driver options individually for each target device,
 173  and also include sending a bus device reset to the specific target device
 174  associated with the command being reset, as well as suppressing error
 175  recovery entirely to avoid perturbing an improperly functioning device.  If
 176  the bus device reset error recovery strategy is selected and sending a bus
 177  device reset does not restore correct operation, the next command that is
 178  reset will force a full host adapter hard reset and SCSI bus reset.  SCSI bus
 179  resets caused by other devices and detected by the host adapter are also
 180  handled by issuing a soft reset to the host adapter and re-initialization.
 181  Finally, if tagged queuing is active and more than one command reset occurs
 182  in a 10 minute interval, or if a command reset occurs within the first 10
 183  minutes of operation, then tagged queuing will be disabled for that target
 184  device.  These error recovery options improve overall system robustness by
 185  preventing individual errant devices from causing the system as a whole to
 186  lock up or crash, and thereby allowing a clean shutdown and restart after the
 187  offending component is removed.
 188
 189PCI Configuration Support
 190-------------------------
 191
 192  On PCI systems running kernels compiled with PCI BIOS support enabled, this
 193  driver will interrogate the PCI configuration space and use the I/O port
 194  addresses assigned by the system BIOS, rather than the ISA compatible I/O
 195  port addresses.  The ISA compatible I/O port address is then disabled by the
 196  driver.  On PCI systems it is also recommended that the AutoSCSI utility be
 197  used to disable the ISA compatible I/O port entirely as it is not necessary.
 198  The ISA compatible I/O port is disabled by default on the BT-948/958/958D.
 199
 200/proc File System Support
 201-------------------------
 202
 203  Copies of the host adapter configuration information together with updated
 204  data transfer and error recovery statistics are available through the
 205  /proc/scsi/BusLogic/<N> interface.
 206
 207Shared Interrupts Support
 208-------------------------
 209
 210  On systems that support shared interrupts, any number of BusLogic Host
 211  Adapters may share the same interrupt request channel.
 212
 213
 214Supported Host Adapters
 215=======================
 216
 217The following list comprises the supported BusLogic SCSI Host Adapters as of
 218the date of this document.  It is recommended that anyone purchasing a BusLogic
 219Host Adapter not in the following table contact the author beforehand to verify
 220that it is or will be supported.
 221
 222FlashPoint Series PCI Host Adapters:
 223
 224======================= =============================================
 225FlashPoint LT (BT-930)  Ultra SCSI-3
 226FlashPoint LT (BT-930R) Ultra SCSI-3 with RAIDPlus
 227FlashPoint LT (BT-920)  Ultra SCSI-3 (BT-930 without BIOS)
 228FlashPoint DL (BT-932)  Dual Channel Ultra SCSI-3
 229FlashPoint DL (BT-932R) Dual Channel Ultra SCSI-3 with RAIDPlus
 230FlashPoint LW (BT-950)  Wide Ultra SCSI-3
 231FlashPoint LW (BT-950R) Wide Ultra SCSI-3 with RAIDPlus
 232FlashPoint DW (BT-952)  Dual Channel Wide Ultra SCSI-3
 233FlashPoint DW (BT-952R) Dual Channel Wide Ultra SCSI-3 with RAIDPlus
 234======================= =============================================
 235
 236MultiMaster "W" Series Host Adapters:
 237
 238=======     ===         ==============================
 239BT-948      PCI         Ultra SCSI-3
 240BT-958      PCI         Wide Ultra SCSI-3
 241BT-958D     PCI         Wide Differential Ultra SCSI-3
 242=======     ===         ==============================
 243
 244MultiMaster "C" Series Host Adapters:
 245
 246========    ====        ==============================
 247BT-946C     PCI         Fast SCSI-2
 248BT-956C     PCI         Wide Fast SCSI-2
 249BT-956CD    PCI         Wide Differential Fast SCSI-2
 250BT-445C     VLB         Fast SCSI-2
 251BT-747C     EISA        Fast SCSI-2
 252BT-757C     EISA        Wide Fast SCSI-2
 253BT-757CD    EISA        Wide Differential Fast SCSI-2
 254========    ====        ==============================
 255
 256MultiMaster "S" Series Host Adapters:
 257
 258=======     ====        ==============================
 259BT-445S     VLB         Fast SCSI-2
 260BT-747S     EISA        Fast SCSI-2
 261BT-747D     EISA        Differential Fast SCSI-2
 262BT-757S     EISA        Wide Fast SCSI-2
 263BT-757D     EISA        Wide Differential Fast SCSI-2
 264BT-742A     EISA        SCSI-2 (742A revision H)
 265=======     ====        ==============================
 266
 267MultiMaster "A" Series Host Adapters:
 268
 269=======     ====        ==============================
 270BT-742A     EISA        SCSI-2 (742A revisions A - G)
 271=======     ====        ==============================
 272
 273AMI FastDisk Host Adapters that are true BusLogic MultiMaster clones are also
 274supported by this driver.
 275
 276BusLogic SCSI Host Adapters are available packaged both as bare boards and as
 277retail kits.  The BT- model numbers above refer to the bare board packaging.
 278The retail kit model numbers are found by replacing BT- with KT- in the above
 279list.  The retail kit includes the bare board and manual as well as cabling and
 280driver media and documentation that are not provided with bare boards.
 281
 282
 283FlashPoint Installation Notes
 284=============================
 285
 286RAIDPlus Support
 287----------------
 288
 289  FlashPoint Host Adapters now include RAIDPlus, Mylex's bootable software
 290  RAID.  RAIDPlus is not supported on Linux, and there are no plans to support
 291  it.  The MD driver in Linux 2.0 provides for concatenation (LINEAR) and
 292  striping (RAID-0), and support for mirroring (RAID-1), fixed parity (RAID-4),
 293  and distributed parity (RAID-5) is available separately.  The built-in Linux
 294  RAID support is generally more flexible and is expected to perform better
 295  than RAIDPlus, so there is little impetus to include RAIDPlus support in the
 296  BusLogic driver.
 297
 298Enabling UltraSCSI Transfers
 299----------------------------
 300
 301  FlashPoint Host Adapters ship with their configuration set to "Factory
 302  Default" settings that are conservative and do not allow for UltraSCSI speed
 303  to be negotiated.  This results in fewer problems when these host adapters
 304  are installed in systems with cabling or termination that is not sufficient
 305  for UltraSCSI operation, or where existing SCSI devices do not properly
 306  respond to synchronous transfer negotiation for UltraSCSI speed.  AutoSCSI
 307  may be used to load "Optimum Performance" settings which allow UltraSCSI
 308  speed to be negotiated with all devices, or UltraSCSI speed can be enabled on
 309  an individual basis.  It is recommended that SCAM be manually disabled after
 310  the "Optimum Performance" settings are loaded.
 311
 312
 313BT-948/958/958D Installation Notes
 314==================================
 315
 316The BT-948/958/958D PCI Ultra SCSI Host Adapters have some features which may
 317require attention in some circumstances when installing Linux.
 318
 319PCI I/O Port Assignments
 320------------------------
 321
 322  When configured to factory default settings, the BT-948/958/958D will only
 323  recognize the PCI I/O port assignments made by the motherboard's PCI BIOS.
 324  The BT-948/958/958D will not respond to any of the ISA compatible I/O ports
 325  that previous BusLogic SCSI Host Adapters respond to.  This driver supports
 326  the PCI I/O port assignments, so this is the preferred configuration.
 327  However, if the obsolete BusLogic driver must be used for any reason, such as
 328  a Linux distribution that does not yet use this driver in its boot kernel,
 329  BusLogic has provided an AutoSCSI configuration option to enable a legacy ISA
 330  compatible I/O port.
 331
 332  To enable this backward compatibility option, invoke the AutoSCSI utility via
 333  Ctrl-B at system startup and select "Adapter Configuration", "View/Modify
 334  Configuration", and then change the "ISA Compatible Port" setting from
 335  "Disable" to "Primary" or "Alternate".  Once this driver has been installed,
 336  the "ISA Compatible Port" option should be set back to "Disable" to avoid
 337  possible future I/O port conflicts.  The older BT-946C/956C/956CD also have
 338  this configuration option, but the factory default setting is "Primary".
 339
 340PCI Slot Scanning Order
 341-----------------------
 342
 343  In systems with multiple BusLogic PCI Host Adapters, the order in which the
 344  PCI slots are scanned may appear reversed with the BT-948/958/958D as
 345  compared to the BT-946C/956C/956CD.  For booting from a SCSI disk to work
 346  correctly, it is necessary that the host adapter's BIOS and the kernel agree
 347  on which disk is the boot device, which requires that they recognize the PCI
 348  host adapters in the same order.  The motherboard's PCI BIOS provides a
 349  standard way of enumerating the PCI host adapters, which is used by the Linux
 350  kernel.  Some PCI BIOS implementations enumerate the PCI slots in order of
 351  increasing bus number and device number, while others do so in the opposite
 352  direction.
 353
 354  Unfortunately, Microsoft decided that Windows 95 would always enumerate the
 355  PCI slots in order of increasing bus number and device number regardless of
 356  the PCI BIOS enumeration, and requires that their scheme be supported by the
 357  host adapter's BIOS to receive Windows 95 certification.  Therefore, the
 358  factory default settings of the BT-948/958/958D enumerate the host adapters
 359  by increasing bus number and device number.  To disable this feature, invoke
 360  the AutoSCSI utility via Ctrl-B at system startup and select "Adapter
 361  Configuration", "View/Modify Configuration", press Ctrl-F10, and then change
 362  the "Use Bus And Device # For PCI Scanning Seq." option to OFF.
 363
 364  This driver will interrogate the setting of the PCI Scanning Sequence option
 365  so as to recognize the host adapters in the same order as they are enumerated
 366  by the host adapter's BIOS.
 367
 368Enabling UltraSCSI Transfers
 369----------------------------
 370
 371  The BT-948/958/958D ship with their configuration set to "Factory Default"
 372  settings that are conservative and do not allow for UltraSCSI speed to be
 373  negotiated.  This results in fewer problems when these host adapters are
 374  installed in systems with cabling or termination that is not sufficient for
 375  UltraSCSI operation, or where existing SCSI devices do not properly respond
 376  to synchronous transfer negotiation for UltraSCSI speed.  AutoSCSI may be
 377  used to load "Optimum Performance" settings which allow UltraSCSI speed to be
 378  negotiated with all devices, or UltraSCSI speed can be enabled on an
 379  individual basis.  It is recommended that SCAM be manually disabled after the
 380  "Optimum Performance" settings are loaded.
 381
 382
 383Driver Options
 384==============
 385
 386BusLogic Driver Options may be specified either via the Linux Kernel Command
 387Line or via the Loadable Kernel Module Installation Facility.  Driver Options
 388for multiple host adapters may be specified either by separating the option
 389strings by a semicolon, or by specifying multiple "BusLogic=" strings on the
 390command line.  Individual option specifications for a single host adapter are
 391separated by commas.  The Probing and Debugging Options apply to all host
 392adapters whereas the remaining options apply individually only to the
 393selected host adapter.
 394
 395The BusLogic Driver Probing Options comprise the following:
 396
 397NoProbe
 398
 399  The "NoProbe" option disables all probing and therefore no BusLogic Host
 400  Adapters will be detected.
 401
 402NoProbePCI
 403
 404  The "NoProbePCI" options disables the interrogation of PCI Configuration
 405  Space and therefore only ISA Multimaster Host Adapters will be detected, as
 406  well as PCI Multimaster Host Adapters that have their ISA Compatible I/O
 407  Port set to "Primary" or "Alternate".
 408
 409NoSortPCI
 410
 411  The "NoSortPCI" option forces PCI MultiMaster Host Adapters to be
 412  enumerated in the order provided by the PCI BIOS, ignoring any setting of
 413  the AutoSCSI "Use Bus And Device # For PCI Scanning Seq." option.
 414
 415MultiMasterFirst
 416
 417  The "MultiMasterFirst" option forces MultiMaster Host Adapters to be probed
 418  before FlashPoint Host Adapters.  By default, if both FlashPoint and PCI
 419  MultiMaster Host Adapters are present, this driver will probe for
 420  FlashPoint Host Adapters first unless the BIOS primary disk is controlled
 421  by the first PCI MultiMaster Host Adapter, in which case MultiMaster Host
 422  Adapters will be probed first.
 423
 424FlashPointFirst
 425
 426  The "FlashPointFirst" option forces FlashPoint Host Adapters to be probed
 427  before MultiMaster Host Adapters.
 428
 429The BusLogic Driver Tagged Queuing Options allow for explicitly specifying
 430the Queue Depth and whether Tagged Queuing is permitted for each Target
 431Device (assuming that the Target Device supports Tagged Queuing).  The Queue
 432Depth is the number of SCSI Commands that are allowed to be concurrently
 433presented for execution (either to the Host Adapter or Target Device).  Note
 434that explicitly enabling Tagged Queuing may lead to problems; the option to
 435enable or disable Tagged Queuing is provided primarily to allow disabling
 436Tagged Queuing on Target Devices that do not implement it correctly.  The
 437following options are available:
 438
 439QueueDepth:<integer>
 440
 441  The "QueueDepth:" or QD:" option specifies the Queue Depth to use for all
 442  Target Devices that support Tagged Queuing, as well as the maximum Queue
 443  Depth for devices that do not support Tagged Queuing.  If no Queue Depth
 444  option is provided, the Queue Depth will be determined automatically based
 445  on the Host Adapter's Total Queue Depth and the number, type, speed, and
 446  capabilities of the detected Target Devices.  Target Devices that
 447  do not support Tagged Queuing always have their Queue Depth set to
 448  BusLogic_UntaggedQueueDepth or BusLogic_UntaggedQueueDepthBB, unless a
 449  lower Queue Depth option is provided.  A Queue Depth of 1 automatically
 450  disables Tagged Queuing.
 451
 452QueueDepth:[<integer>,<integer>...]
 453
 454  The "QueueDepth:[...]" or "QD:[...]" option specifies the Queue Depth
 455  individually for each Target Device.  If an <integer> is omitted, the
 456  associated Target Device will have its Queue Depth selected automatically.
 457
 458TaggedQueuing:Default
 459
 460  The "TaggedQueuing:Default" or "TQ:Default" option permits Tagged Queuing
 461  based on the firmware version of the BusLogic Host Adapter and based on
 462  whether the Queue Depth allows queuing multiple commands.
 463
 464TaggedQueuing:Enable
 465
 466  The "TaggedQueuing:Enable" or "TQ:Enable" option enables Tagged Queuing for
 467  all Target Devices on this Host Adapter, overriding any limitation that
 468  would otherwise be imposed based on the Host Adapter firmware version.
 469
 470TaggedQueuing:Disable
 471
 472  The "TaggedQueuing:Disable" or "TQ:Disable" option disables Tagged Queuing
 473  for all Target Devices on this Host Adapter.
 474
 475TaggedQueuing:<Target-Spec>
 476
 477  The "TaggedQueuing:<Target-Spec>" or "TQ:<Target-Spec>" option controls
 478  Tagged Queuing individually for each Target Device.  <Target-Spec> is a
 479  sequence of "Y", "N", and "X" characters.  "Y" enables Tagged Queuing, "N"
 480  disables Tagged Queuing, and "X" accepts the default based on the firmware
 481  version.  The first character refers to Target Device 0, the second to
 482  Target Device 1, and so on; if the sequence of "Y", "N", and "X" characters
 483  does not cover all the Target Devices, unspecified characters are assumed
 484  to be "X".
 485
 486The BusLogic Driver Miscellaneous Options comprise the following:
 487
 488BusSettleTime:<seconds>
 489
 490  The "BusSettleTime:" or "BST:" option specifies the Bus Settle Time in
 491  seconds.  The Bus Settle Time is the amount of time to wait between a Host
 492  Adapter Hard Reset which initiates a SCSI Bus Reset and issuing any SCSI
 493  Commands.  If unspecified, it defaults to BusLogic_DefaultBusSettleTime.
 494
 495InhibitTargetInquiry
 496
 497  The "InhibitTargetInquiry" option inhibits the execution of an Inquire
 498  Target Devices or Inquire Installed Devices command on MultiMaster Host
 499  Adapters.  This may be necessary with some older Target Devices that do not
 500  respond correctly when Logical Units above 0 are addressed.
 501
 502The BusLogic Driver Debugging Options comprise the following:
 503
 504TraceProbe
 505
 506  The "TraceProbe" option enables tracing of Host Adapter Probing.
 507
 508TraceHardwareReset
 509
 510  The "TraceHardwareReset" option enables tracing of Host Adapter Hardware
 511  Reset.
 512
 513TraceConfiguration
 514
 515  The "TraceConfiguration" option enables tracing of Host Adapter
 516  Configuration.
 517
 518TraceErrors
 519
 520  The "TraceErrors" option enables tracing of SCSI Commands that return an
 521  error from the Target Device.  The CDB and Sense Data will be printed for
 522  each SCSI Command that fails.
 523
 524Debug
 525
 526  The "Debug" option enables all debugging options.
 527
 528The following examples demonstrate setting the Queue Depth for Target Devices
 5291 and 2 on the first host adapter to 7 and 15, the Queue Depth for all Target
 530Devices on the second host adapter to 31, and the Bus Settle Time on the
 531second host adapter to 30 seconds.
 532
 533Linux Kernel Command Line::
 534
 535  linux BusLogic=QueueDepth:[,7,15];QueueDepth:31,BusSettleTime:30
 536
 537LILO Linux Boot Loader (in /etc/lilo.conf)::
 538
 539  append = "BusLogic=QueueDepth:[,7,15];QueueDepth:31,BusSettleTime:30"
 540
 541INSMOD Loadable Kernel Module Installation Facility::
 542
 543  insmod BusLogic.o \
 544      'BusLogic="QueueDepth:[,7,15];QueueDepth:31,BusSettleTime:30"'
 545
 546
 547.. Note::
 548
 549      Module Utilities 2.1.71 or later is required for correct parsing
 550      of driver options containing commas.
 551
 552
 553Driver Installation
 554===================
 555
 556This distribution was prepared for Linux kernel version 2.0.35, but should be
 557compatible with 2.0.4 or any later 2.0 series kernel.
 558
 559To install the new BusLogic SCSI driver, you may use the following commands,
 560replacing "/usr/src" with wherever you keep your Linux kernel source tree::
 561
 562  cd /usr/src
 563  tar -xvzf BusLogic-2.0.15.tar.gz
 564  mv README.* LICENSE.* BusLogic.[ch] FlashPoint.c linux/drivers/scsi
 565  patch -p0 < BusLogic.patch (only for 2.0.33 and below)
 566  cd linux
 567  make config
 568  make zImage
 569
 570Then install "arch/x86/boot/zImage" as your standard kernel, run lilo if
 571appropriate, and reboot.
 572
 573
 574BusLogic Announcements Mailing List
 575===================================
 576
 577The BusLogic Announcements Mailing List provides a forum for informing Linux
 578users of new driver releases and other announcements regarding Linux support
 579for BusLogic SCSI Host Adapters.  To join the mailing list, send a message to
 580"buslogic-announce-request@dandelion.com" with the line "subscribe" in the
 581message body.
 582