Documentation/scsi/ChangeLog.megaraid_sas

   1 Release Date    : Mon. Mar 10, 2014 17:00:00 PST 2014 -
   2                         (emaild-id:megaraidlinux@lsi.com)
   3                         Adam Radford
   4                         Kashyap Desai
   5                         Sumit Saxena
   6 Current Version : 06.803.01.00-rc1
   7 Old Version     : 06.700.06.00-rc1
   8     1. Load correct raid context timeout value for multipathing & clustering.
   9     2. Fix megasas_ioc_init_fusion to use local stack variable.
  10     3. Return leaked MPT frames to MPT command pool.
  11     4. Add Dell PowerEdge VRTX SR-IOV VF device support.
  12     5. Version and Changelog update.
  13 -------------------------------------------------------------------------------
  14 Release Date    : Sat. Aug 31, 2013 17:00:00 PST 2013 -
  15                         (emaild-id:megaraidlinux@lsi.com)
  16                         Adam Radford
  17                         Kashyap Desai
  18                         Sumit Saxena
  19 Current Version : 06.700.06.00-rc1
  20 Old Version     : 06.600.18.00-rc1
  21     1. Add High Availability clustering support using shared Logical Disks.
  22     2. Version and Changelog update.
  23 -------------------------------------------------------------------------------
  24 Release Date    : Wed. May 15, 2013 17:00:00 PST 2013 -
  25                         (emaild-id:megaraidlinux@lsi.com)
  26                         Adam Radford
  27                         Kashyap Desai
  28                         Sumit Saxena
  29 Current Version : 06.600.18.00-rc1
  30 Old Version     : 06.506.00.00-rc1
  31     1. Return DID_ERROR for scsi io, when controller is in critical h/w error.
  32     2. Fix the interrupt mask for Gen2 controller.
  33     3. Update balance count in driver to be in sync of firmware.
  34     4. Free event detail memory without device ID check.
  35     5. Set IO request timeout value provided by OS timeout for Tape devices.
  36     6. Add support for MegaRAID Fury (device ID-0x005f) 12Gb/s controllers.
  37     7. Add support to display Customer branding details in syslog.
  38     8. Set IoFlags to enable Fast Path for JBODs for Invader/Fury(12 Gb/s)
  39     controllers.
  40     9. Add support for Extended MSI-x vectors for Invader and Fury(12Gb/s
  41     HBA).
  42     10.Add support for Uneven Span PRL11.
  43     11.Add support to differentiate between iMR and MR Firmware.
  44     12.Version and Changelog update.
  45 -------------------------------------------------------------------------------
  46 Release Date    : Sat. Feb 9, 2013 17:00:00 PST 2013 -
  47                         (emaild-id:megaraidlinux@lsi.com)
  48                         Adam Radford
  49 Current Version : 06.506.00.00-rc1
  50 Old Version     : 06.504.01.00-rc1
  51     1. Add 4k FastPath DIF support.
  52     2. Dont load DevHandle unless FastPath enabled.
  53     3. Version and Changelog update.
  54 -------------------------------------------------------------------------------
  55 Release Date    : Mon. Oct 1, 2012 17:00:00 PST 2012 -
  56                         (emaild-id:megaraidlinux@lsi.com)
  57                         Adam Radford
  58 Current Version : 06.504.01.00-rc1
  59 Old Version     : 00.00.06.18-rc1
  60     1. Removed un-needed completion_lock spinlock calls.
  61     2. Add module param for configurable MSI-X vector count.
  62     3. Load io_request DataLength in bytes.
  63     4. Add array boundary check for SystemPD.
  64     5. Add SystemPD FastPath support.
  65     6. Remove duplicate code.
  66     7. Version, Changelog, Copyright update.
  67 -------------------------------------------------------------------------------
  68 Release Date    : Tue. Jun 17, 2012 17:00:00 PST 2012 -
  69                         (emaild-id:megaraidlinux@lsi.com)
  70                         Adam Radford/Kashyap Desai
  71 Current Version : 00.00.06.18-rc1
  72 Old Version     : 00.00.06.15-rc1
  73     1. Fix Copyright dates.
  74     2. Add throttlequeuedepth module parameter.
  75     3. Add resetwaittime module parameter.
  76     4. Move poll_aen_lock initializer.
  77 -------------------------------------------------------------------------------
  78 Release Date    : Mon. Mar 19, 2012 17:00:00 PST 2012 -
  79                         (emaild-id:megaraidlinux@lsi.com)
  80                         Adam Radford
  81 Current Version : 00.00.06.15-rc1
  82 Old Version     : 00.00.06.14-rc1
  83     1. Optimize HostMSIxVectors setting.
  84     2. Add fpRead/WriteCapable, fpRead/WriteAcrossStripe checks.
  85 -------------------------------------------------------------------------------
  86 Release Date    : Fri. Jan 6, 2012 17:00:00 PST 2010 -
  87                         (emaild-id:megaraidlinux@lsi.com)
  88                         Adam Radford
  89 Current Version : 00.00.06.14-rc1
  90 Old Version     : 00.00.06.12-rc1
  91     1. Fix reglockFlags for degraded raid5/6 for MR 9360/9380.
  92     2. Mask off flags in ioctl path to prevent memory scribble with older
  93        MegaCLI versions.
  94     3. Remove poll_mode_io module paramater, sysfs node, and associated code.
  95 -------------------------------------------------------------------------------
  96 Release Date    : Wed. Oct 5, 2011 17:00:00 PST 2010 -
  97                         (emaild-id:megaraidlinux@lsi.com)
  98                         Adam Radford
  99 Current Version : 00.00.06.12-rc1
 100 Old Version     : 00.00.05.40-rc1
 101     1. Continue booting immediately if FW in FAULT at driver load time.
 102     2. Increase default cmds per lun to 256.
 103     3. Fix mismatch in megasas_reset_fusion() mutex lock-unlock.
 104     4. Remove some un-necessary code.
 105     5. Clear state change interrupts for Fusion/Invader.
 106     6. Clear FUSION_IN_RESET before enabling interrupts.
 107     7. Add support for MegaRAID 9360/9380 12GB/s controllers.
 108     8. Add multiple MSI-X vector/multiple reply queue support.
 109     9. Add driver workaround for PERC5/1068 kdump kernel panic.
 110 -------------------------------------------------------------------------------
 111 Release Date    : Tue. Jul 26, 2011 17:00:00 PST 2010 -
 112                         (emaild-id:megaraidlinux@lsi.com)
 113                         Adam Radford
 114 Current Version : 00.00.05.40-rc1
 115 Old Version     : 00.00.05.38-rc1
 116     1. Fix FastPath I/O to work with degraded RAID 1.
 117     2. Add .change_queue_depth support.
 118 -------------------------------------------------------------------------------
 119 Release Date    : Wed. May 11, 2011 17:00:00 PST 2010 -
 120                         (emaild-id:megaraidlinux@lsi.com)
 121                         Adam Radford
 122 Current Version : 00.00.05.38-rc1
 123 Old Version     : 00.00.05.34-rc1
 124     1. Remove MSI-X black list, use MFI_REG_STATE.ready.msiEnable.
 125     2. Remove un-used function megasas_return_cmd_for_smid().
 126     3. Check MFI_REG_STATE.fault.resetAdapter in megasas_reset_fusion().
 127     4. Disable interrupts/free_irq() in megasas_shutdown().
 128     5. Fix bug where AENs could be lost in probe() and resume().
 129     6. Convert 6,10,12 byte CDB's to 16 byte CDB for large LBA's for FastPath
 130        IO.
 131     7. Add 1078 OCR support.
 132 -------------------------------------------------------------------------------
 133 Release Date    : Thu. Feb 24, 2011 17:00:00 PST 2010 -
 134                         (emaild-id:megaraidlinux@lsi.com)
 135                         Adam Radford
 136 Current Version : 00.00.05.34-rc1
 137 Old Version     : 00.00.05.29-rc1
 138     1. Fix some failure gotos from megasas_probe_one(), etc.
 139     2. Add missing check_and_restore_queue_depth() call in
 140        complete_cmd_fusion().
 141     3. Enable MSI-X before calling megasas_init_fw().
 142     4. Call tasklet_schedule() even if outbound_intr_status == 0 for MFI based
 143        boards in MSI-X mode.
 144     5. Fix megasas_probe_one() to clear PCI_MSIX_FLAGS_ENABLE in msi control
 145        register in kdump kernel.
 146     6. Fix megasas_get_cmd() to only print "Command pool empty" if
 147        megasas_dbg_lvl is set.
 148     7. Fix megasas_build_dcdb_fusion() to not filter by TYPE_DISK.
 149     8. Fix megasas_build_dcdb_fusion() to use io_request->LUN[1] field.
 150     9. Add MR_EVT_CFG_CLEARED to megasas_aen_polling().
 151     10. Fix tasklet_init() in megasas_init_fw() to use instancet->tasklet.
 152     11. Fix fault state handling in megasas_transition_to_ready().
 153     12. Fix max_sectors setting for IEEE SGL's.
 154     13. Fix iMR OCR support to work correctly.
 155 -------------------------------------------------------------------------------
 156 Release Date    : Tues.  Dec 14, 2010 17:00:00 PST 2010 -
 157                         (emaild-id:megaraidlinux@lsi.com)
 158                         Adam Radford
 159 Current Version : 00.00.05.29-rc1
 160 Old Version     : 00.00.04.31-rc1
 161     1. Rename megaraid_sas.c to megaraid_sas_base.c.
 162     2. Update GPL headers.
 163     3. Add MSI-X support and 'msix_disable' module parameter.
 164     4. Use lowest memory bar (for SR-IOV VF support).
 165     5. Add struct megasas_instance_temlate changes, and change all code to use
 166        new instance entries:
 167
 168        irqreturn_t (*service_isr )(int irq, void *devp);
 169        void (*tasklet)(unsigned long);
 170        u32 (*init_adapter)(struct megasas_instance *);
 171        u32 (*build_and_issue_cmd) (struct megasas_instance *,
 172        struct scsi_cmnd *);
 173        void (*issue_dcmd) (struct megasas_instance *instance,
 174                               struct megasas_cmd *cmd);
 175
 176    6. Add code to support MegaRAID 9265/9285 controllers device id (0x5b).
 177 -------------------------------------------------------------------------------
 178 1 Release Date    : Thur.  May 03, 2010 09:12:45 PST 2009 -
 179                         (emaild-id:megaraidlinux@lsi.com)
 180                         Bo Yang
 181
 182 2 Current Version : 00.00.04.31-rc1
 183 3 Older Version   : 00.00.04.17.1-rc1
 184
 185 1.      Add the Online Controller Reset (OCR) to the Driver.
 186         OCR is the new feature for megaraid_sas driver which
 187         will allow the fw to do the chip reset which will not
 188         affact the OS behavious.
 189
 190         To add the OCR support, driver need to do:
 191                 a). reset the controller chips -- Xscale and Gen2 which
 192                 will change the function calls and add the reset function
 193                 related to this two chips.
 194
 195                 b). during the reset, driver will store the pending cmds
 196                 which not returned by FW to driver's pending queue.  Driver
 197                 will re-issue those pending cmds again to FW after the OCR
 198                 finished.
 199
 200                 c). In driver's timeout routine, driver will report to
 201                 OS as reset. Also driver's queue routine will block the
 202                 cmds until the OCR finished.
 203
 204                 d). in Driver's ISR routine, if driver get the FW state as
 205                 state change, FW in Failure status and FW support online controller
 206                 reset (OCR), driver will start to do the controller reset.
 207
 208                 e). In driver's IOCTL routine, the application cmds will wait for the
 209                 OCR to finish, then issue the cmds to FW.
 210
 211                 f). Before driver kill adapter, driver will do last chance of
 212                 OCR to see if driver can bring back the FW.
 213
 214 2.      Add the support update flag to the driver to tell LSI megaraid_sas
 215         application which driver will support the device update.  So application
 216         will not need to do the device update after application add/del the device
 217         from the system.
 218 3.      In driver's timeout routine, driver will do three time reset if fw is in
 219         failed state.  Driver will kill adapter if can't bring back FW after the
 220         this three times reset.
 221 4.      Add the input parameter max_sectors to 1MB support to our GEN2 controller.
 222         customer can use the input paramenter max_sectors to add 1MB support to GEN2
 223         controller.
 224
 225 1 Release Date    : Thur.  Oct 29, 2009 09:12:45 PST 2009 -
 226                         (emaild-id:megaraidlinux@lsi.com)
 227                         Bo Yang
 228
 229 2 Current Version : 00.00.04.17.1-rc1
 230 3 Older Version   : 00.00.04.12
 231
 232 1.      Add the pad_0 in mfi frame structure to 0 to fix the
 233         context value larger than 32bit value issue.
 234
 235 2.      Add the logic drive list to the driver.  Driver will
 236         keep the logic drive list internal after driver load.
 237
 238 3.      driver fixed the device update issue after get the AEN
 239         PD delete/ADD, LD add/delete from FW.
 240
 241 1 Release Date    : Tues.  July 28, 2009 10:12:45 PST 2009 -
 242                         (emaild-id:megaraidlinux@lsi.com)
 243                         Bo Yang
 244
 245 2 Current Version : 00.00.04.12
 246 3 Older Version   : 00.00.04.10
 247
 248 1.      Change the AEN sys PD update from scsi_scan to
 249         scsi_add_device and scsi_remove_device.
 250 2.      Takeoff the debug print-out in aen_polling routine.
 251
 252 1 Release Date    : Thur.  July 02, 2009 10:12:45 PST 2009 -
 253                         (emaild-id:megaraidlinux@lsi.com)
 254                         Bo Yang
 255
 256 2 Current Version : 00.00.04.10
 257 3 Older Version   : 00.00.04.08
 258
 259 1.      Add the 3 mins timeout during the controller initialize.
 260 2.      Add the fix for 64bit sense date errors.
 261
 262 1 Release Date    : Tues. May 05, 2009 10:12:45 PST 2009 -
 263                         (emaild-id:megaraidlinux@lsi.com)
 264                         Bo Yang
 265
 266 2 Current Version : 00.00.04.08
 267 3 Older Version   : 00.00.04.06
 268
 269 1.      Add the fix of pending in FW after deleted the logic drives.
 270 2.      Add the fix of deallocating memory after get pdlist.
 271
 272 1 Release Date    : Tues. March 26, 2009 10:12:45 PST 2009 -
 273                         (emaild-id:megaraidlinux@lsi.com)
 274                         Bo Yang
 275
 276 2 Current Version : 00.00.04.06
 277 3 Older Version   : 00.00.04.04
 278
 279 1.      Add the fix of the driver cmd empty fix of the driver cmd empty.
 280 2.      Add the fix of the driver MSM AEN CMD cause the system slow.
 281
 282 1 Release Date    : Tues. March 03, 2009 10:12:45 PST 2009 -
 283                         (emaild-id:megaraidlinux@lsi.com)
 284                         Bo Yang
 285
 286 2 Current Version : 00.00.04.04
 287 3 Older Version   : 00.00.04.01
 288
 289 1.      Add the Tape drive fix to the driver: If the command is for
 290         the tape device, set the pthru timeout to the os layer timeout value.
 291
 292 2.      Add Poll_wait mechanism to Gen-2 Linux driv.
 293                 In the aen handler, driver needs to wakeup poll handler similar to
 294                 the way it raises SIGIO.
 295
 296 3.      Add new controller new SAS2 support to the driver.
 297
 298 4.      Report the unconfigured PD (system PD) to OS.
 299
 300 5.      Add the IEEE SGL support to the driver
 301
 302 6.      Reasign the Application cmds to SAS2 controller
 303
 304 1 Release Date    : Thur.July. 24 11:41:51 PST 2008 -
 305                        (emaild-id:megaraidlinux@lsi.com)
 306                        Sumant Patro
 307                        Bo Yang
 308
 309 2 Current Version : 00.00.04.01
 310 3 Older Version   : 00.00.03.22
 311
 312 1. Add the new controller (0078, 0079) support to the driver
 313        Those controllers are LSI's next generatation(gen2) SAS controllers.
 314
 315 1 Release Date    : Mon.June. 23 10:12:45 PST 2008 -
 316                        (emaild-id:megaraidlinux@lsi.com)
 317                        Sumant Patro
 318                        Bo Yang
 319
 320 2 Current Version : 00.00.03.22
 321 3 Older Version   : 00.00.03.20
 322
 323 1. Add shutdown DCMD cmd to the shutdown routine to make FW shutdown proper.
 324 2. Unexpected interrupt occurs in HWR Linux driver, add the dumy readl pci flush will fix this issue.
 325
 326 1 Release Date    : Mon. March 10 11:02:31 PDT 2008 -
 327                         (emaild-id:megaraidlinux@lsi.com)
 328                         Sumant Patro
 329                         Bo Yang
 330
 331 2 Current Version : 00.00.03.20-RC1
 332 3 Older Version   : 00.00.03.16
 333
 334 1. Rollback the sense info implementation
 335         Sense buffer ptr data type in the ioctl path is reverted back
 336         to u32 * as in previous versions of driver.
 337
 338 2. Fixed the driver frame count.
 339         When Driver sent wrong frame count to firmware.  As this
 340         particular command is sent to drive, FW is seeing continuous
 341         chip resets and so the command will timeout.
 342
 343 3. Add the new controller(1078DE) support to the driver
 344         and Increase the max_wait to 60 from 10 in the controller
 345         operational status.  With this max_wait increase, driver will
 346         make sure the FW will   finish the pending cmd for KDUMP case.
 347
 348 1 Release Date    : Thur. Nov. 07 16:30:43 PST 2007 -
 349                         (emaild-id:megaraidlinux@lsi.com)
 350                         Sumant Patro
 351                         Bo Yang
 352
 353 2 Current Version : 00.00.03.16
 354 3 Older Version   : 00.00.03.15
 355
 356 1. Increased MFI_POLL_TIMEOUT_SECS to 60 seconds from 10. FW may take
 357         a max of 60 seconds to respond to the INIT cmd.
 358
 359 1 Release Date    : Fri. Sep. 07 16:30:43 PST 2007 -
 360                         (emaild-id:megaraidlinux@lsi.com)
 361                         Sumant Patro
 362                         Bo Yang
 363
 364 2 Current Version : 00.00.03.15
 365 3 Older Version   : 00.00.03.14
 366
 367 1. Added module parameter "poll_mode_io" to support for "polling"
 368         (reduced interrupt operation).  In this mode, IO completion
 369         interrupts are delayed. At the end of initiating IOs, the
 370         driver schedules for cmd completion if there are pending cmds
 371         to be completed.  A timer-based interrupt has also been added
 372         to prevent IO completion processing from being delayed
 373         indefinitely in the case that no new IOs are initiated.
 374
 375 1 Release Date    : Fri. Sep. 07 16:30:43 PST 2007 -
 376                         (emaild-id:megaraidlinux@lsi.com)
 377                         Sumant Patro
 378                         Bo Yang
 379
 380 2 Current Version : 00.00.03.14
 381 3 Older Version   : 00.00.03.13
 382
 383 1. Setting the max_sectors_per_req based on max SGL supported by the
 384         FW. Prior versions calculated this value from controller info
 385         (max_sectors_1, max_sectors_2). For certain controllers/FW,
 386         this was resulting in a value greater than max SGL supported
 387         by the FW. Issue was first reported by users running LUKS+XFS
 388         with megaraid_sas.  Thanks to RB for providing the logs and
 389         duplication steps that helped to get to the root cause of the
 390         issue.  2. Increased MFI_POLL_TIMEOUT_SECS to 60 seconds from
 391         10. FW may take a max of 60 seconds to respond to the INIT
 392         cmd.
 393
 394 1 Release Date    : Fri. June. 15 16:30:43 PST 2007 -
 395                         (emaild-id:megaraidlinux@lsi.com)
 396                         Sumant Patro
 397                         Bo Yang
 398
 399 2 Current Version : 00.00.03.13
 400 3 Older Version   : 00.00.03.12
 401
 402 1. Added the megasas_reset_timer routine to intercept cmd timeout and throttle io.
 403
 404 On Fri, 2007-03-16 at 16:44 -0600, James Bottomley wrote:
 405 It looks like megaraid_sas at least needs this to throttle its commands
 406 > as they begin to time out.  The code keeps the existing transport
 407 > template use of eh_timed_out (and allows the transport to override the
 408 > host if they both have this callback).
 409 >
 410 > James
 411
 412 1 Release Date    : Sat May. 12 16:30:43 PST 2007 -
 413                         (emaild-id:megaraidlinux@lsi.com)
 414                         Sumant Patro
 415                         Bo Yang
 416
 417 2 Current Version : 00.00.03.12
 418 3 Older Version   : 00.00.03.11
 419
 420 1.  When MegaSAS driver receives reset call from OS, driver waits in reset
 421 routine for max 3 minutes for all pending command completion. Now driver will
 422 call completion routine every 5 seconds from the reset routine instead of
 423 waiting for depending on cmd completion from isr path.
 424
 425 1 Release Date    : Mon Apr. 30 10:25:52 PST 2007 -
 426                         (emaild-id:megaraidlinux@lsi.com)
 427                         Sumant Patro
 428                         Bo Yang
 429
 430 2 Current Version : 00.00.03.11
 431 3 Older Version   : 00.00.03.09
 432
 433         1. Memory Manager for IOCTL removed for 2.6 kernels.
 434            pci_alloc_consistent replaced by dma_alloc_coherent. With this
 435            change there is no need of memory manager in the driver code
 436
 437         On Wed, 2007-02-07 at 13:30 -0800, Andrew Morton wrote:
 438         > I suspect all this horror is due to stupidity in the DMA API.
 439         >
 440         > pci_alloc_consistent() just goes and assumes GFP_ATOMIC, whereas
 441         > the caller (megasas_mgmt_fw_ioctl) would have been perfectly happy
 442         > to use GFP_KERNEL.
 443         >
 444         > I bet this fixes it
 445
 446         It does, but the DMA API was expanded to cope with this exact case, so
 447         use dma_alloc_coherent() directly in the megaraid code instead.  The dev
 448         is just &pci_dev->dev.
 449
 450         James <James.Bottomley@SteelEye.com>
 451
 452         3. SYNCHRONIZE_CACHE is not supported by FW and thus blocked by driver.
 453         4. Hibernation support added
 454         5. Performing diskdump while running IO in RHEL 4 was failing. Fixed.
 455
 456 1 Release Date    : Fri Feb. 09 14:36:28 PST 2007 -
 457                         (emaild-id:megaraidlinux@lsi.com)
 458                         Sumant Patro
 459                         Bo Yang
 460
 461 2 Current Version : 00.00.03.09
 462 3 Older Version   : 00.00.03.08
 463
 464 i.      Under heavy IO mid-layer prints "DRIVER_TIMEOUT" errors
 465
 466         The driver now waits for 10 seconds to elapse instead of 5 (as in
 467         previous release) to resume IO.
 468
 469 1 Release Date    : Mon Feb. 05 11:35:24 PST 2007 -
 470                         (emaild-id:megaraidlinux@lsi.com)
 471                         Sumant Patro
 472                         Bo Yang
 473 2 Current Version : 00.00.03.08
 474 3 Older Version   : 00.00.03.07
 475
 476 i.      Under heavy IO mid-layer prints "DRIVER_TIMEOUT" errors
 477
 478         Fix:    The driver is now throttling IO.
 479         Checks added in megasas_queue_command to know if FW is able to
 480         process commands within timeout period. If number of retries
 481         is 2 or greater,the driver stops sending cmd to FW temporarily. IO is
 482         resumed if pending cmd count reduces to 16 or 5 seconds has elapsed
 483         from the time cmds were last sent to FW.
 484
 485 ii.     FW enables WCE bit in Mode Sense cmd for drives that are configured
 486         as WriteBack. The OS may send "SYNCHRONIZE_CACHE" cmd when Logical
 487         Disks are exposed with WCE=1. User is advised to enable Write Back
 488         mode only when the controller has battery backup. At this time
 489         Synhronize cache is not supported by the FW. Driver will short-cycle
 490         the cmd and return success without sending down to FW.
 491
 492 1 Release Date    : Sun Jan. 14 11:21:32 PDT 2007 -
 493                  Sumant Patro <Sumant.Patro@lsil.com>/Bo Yang
 494 2 Current Version : 00.00.03.07
 495 3 Older Version   : 00.00.03.06
 496
 497 i.      bios_param entry added in scsi_host_template that returns disk geometry
 498         information.
 499
 500 1 Release Date    : Fri Oct 20 11:21:32 PDT 2006 - Sumant Patro <Sumant.Patro@lsil.com>/Bo Yang
 501 2 Current Version : 00.00.03.06
 502 3 Older Version   : 00.00.03.05
 503
 504 1. Added new memory management module to support the IOCTL memory allocation. For IOCTL we try to allocate from the memory pool created during driver initialization. If mem pool is empty then we allocate at run time.
 505 2. Added check in megasas_queue_command and dpc/isr routine to see if we have already declared adapter dead
 506    (hw_crit_error=1). If hw_crit_error==1, now we donot accept any processing of pending cmds/accept any cmd from OS
 507
 508 1 Release Date    : Mon Oct 02 11:21:32 PDT 2006 - Sumant Patro <Sumant.Patro@lsil.com>
 509 2 Current Version : 00.00.03.05
 510 3 Older Version   : 00.00.03.04
 511
 512 i.      PCI_DEVICE macro used
 513
 514         Convert the pci_device_id-table of the megaraid_sas-driver to the PCI_DEVICE-macro, to safe some lines.
 515
 516                 - Henrik Kretzschmar <henne@nachtwindheim.de>
 517 ii.     All compiler warnings removed
 518 iii.    megasas_ctrl_info struct reverted to 3.02 release
 519 iv.     Default value of megasas_dbg_lvl set to 0
 520 v.      Removing in megasas_exit the sysfs entry created for megasas_dbg_lvl
 521 vi.     In megasas_teardown_frame_pool(), cmd->frame was passed instead of
 522         cmd->sense to pci_pool_free. Fixed. Bug was pointed out by
 523         Eric Sesterhenn
 524
 525 1 Release Date    : Wed Sep 13 14:22:51 PDT 2006 - Sumant Patro <Sumant.Patro@lsil.com>
 526 2 Current Version : 00.00.03.04
 527 3 Older Version   : 00.00.03.03
 528
 529 i.      Added Reboot notify
 530 ii.     Reduced by 1 max cmds sent to FW from Driver to make the reply_q_sz same
 531         as Max Cmds FW can support
 532
 533 1 Release Date    : Tue Aug 22 16:33:14 PDT 2006 - Sumant Patro <Sumant.Patro@lsil.com>
 534 2 Current Version : 00.00.03.03
 535 3 Older Version   : 00.00.03.02
 536
 537 i.      Send stop adapter to FW & Dump pending FW cmds before declaring adapter dead.
 538         New varible added to set dbg level.
 539 ii.     Disable interrupt made as fn pointer as they are different for 1068 / 1078
 540 iii.    Frame count optimization. Main frame can contain 2 SGE for 64 bit SGLs and
 541         3 SGE for 32 bit SGL
 542 iv.     Tasklet added for cmd completion
 543 v.      If FW in operational state before firing INIT, now we send RESET Flag to FW instead of just READY. This is used to do soft reset.
 544 vi.     megasas_ctrl_prop structure updated (based on FW struct)
 545 vii.    Added print : FW now in Ready State during initialization
 546
 547 1 Release Date    : Sun Aug 06 22:49:52 PDT 2006 - Sumant Patro <Sumant.Patro@lsil.com>
 548 2 Current Version : 00.00.03.02
 549 3 Older Version   : 00.00.03.01
 550
 551 i.      Added FW tranistion state for Hotplug scenario
 552
 553 1 Release Date    : Sun May 14 22:49:52 PDT 2006 - Sumant Patro <Sumant.Patro@lsil.com>
 554 2 Current Version : 00.00.03.01
 555 3 Older Version   : 00.00.02.04
 556
 557 i.      Added support for ZCR controller.
 558
 559                 New device id 0x413 added.
 560
 561 ii.     Bug fix : Disable controller interrupt before firing INIT cmd to FW.
 562
 563                 Interrupt is enabled after required initialization is over.
 564                 This is done to ensure that driver is ready to handle interrupts when
 565                 it is generated by the controller.
 566
 567                 -Sumant Patro <Sumant.Patro@lsil.com>
 568
 569 1 Release Date    : Wed Feb 03 14:31:44 PST 2006 - Sumant Patro <Sumant.Patro@lsil.com>
 570 2 Current Version : 00.00.02.04
 571 3 Older Version   : 00.00.02.04
 572
 573 i.      Remove superflous instance_lock
 574
 575         gets rid of the otherwise superflous instance_lock and avoids an unsave
 576         unsynchronized access in the error handler.
 577
 578                 - Christoph Hellwig <hch@lst.de>
 579
 580
 581 1 Release Date    : Wed Feb 03 14:31:44 PST 2006 - Sumant Patro <Sumant.Patro@lsil.com>
 582 2 Current Version : 00.00.02.04
 583 3 Older Version   : 00.00.02.04
 584
 585 i.      Support for 1078 type (ppc IOP) controller, device id : 0x60 added.
 586         During initialization, depending on the device id, the template members
 587         are initialized with function pointers specific to the ppc or
 588         xscale controllers.
 589
 590                 -Sumant Patro <Sumant.Patro@lsil.com>
 591
 592 1 Release Date    : Fri Feb 03 14:16:25 PST 2006 - Sumant Patro
 593                                                         <Sumant.Patro@lsil.com>
 594 2 Current Version : 00.00.02.04
 595 3 Older Version   : 00.00.02.02
 596 i.      Register 16 byte CDB capability with scsi midlayer
 597
 598         "This patch properly registers the 16 byte command length capability of the
 599         megaraid_sas controlled hardware with the scsi midlayer. All megaraid_sas
 600         hardware supports 16 byte CDB's."
 601
 602                 -Joshua Giles <joshua_giles@dell.com>
 603
 604 1 Release Date    : Mon Jan 23 14:09:01 PST 2006 - Sumant Patro <Sumant.Patro@lsil.com>
 605 2 Current Version : 00.00.02.02
 606 3 Older Version   : 00.00.02.01
 607
 608 i.      New template defined to represent each family of controllers (identified by processor used).
 609         The template will have defintions that will be initialised to appropritae values for a specific family of controllers. The template definition has four function pointers. During driver initialisation the function pointers will be set based on the controller family type. This change is done to support new controllers that has different processors and thus different register set.
 610
 611                 -Sumant Patro <Sumant.Patro@lsil.com>
 612
 613 1 Release Date    : Mon Dec 19 14:36:26 PST 2005 - Sumant Patro <Sumant.Patro@lsil.com>
 614 2 Current Version : 00.00.02.00-rc4
 615 3 Older Version   : 00.00.02.01
 616
 617 i.      Code reorganized to remove code duplication in megasas_build_cmd.
 618
 619         "There's a lot of duplicate code megasas_build_cmd.  Move that out of the different codepathes and merge the reminder of megasas_build_cmd into megasas_queue_command"
 620
 621                 - Christoph Hellwig <hch@lst.de>
 622
 623 ii.     Defined MEGASAS_IOC_FIRMWARE32 for code paths that handles 32 bit applications in 64 bit systems.
 624
 625         "MEGASAS_IOC_FIRMWARE can't be redefined if CONFIG_COMPAT is set, we need to define a MEGASAS_IOC_FIRMWARE32 define so native binaries continue to work"
 626
 627                 - Christoph Hellwig <hch@lst.de>