linux/Documentation/scsi/ChangeLog.megaraid
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   1Release Date    : Thu Nov 16 15:32:35 EST 2006 -
   2                                Sumant Patro <sumant.patro@lsi.com>
   3Current Version : 2.20.5.1 (scsi module), 2.20.2.6 (cmm module)
   4Older Version   : 2.20.4.9 (scsi module), 2.20.2.6 (cmm module)
   5
   61.      Changes in Initialization to fix kdump failure.
   7        Send SYNC command on loading.
   8        This command clears the pending commands in the adapter
   9        and re-initialize its internal RAID structure.
  10        Without this change, megaraid driver either panics or fails to
  11        initialize the adapter during kdump's second kernel boot
  12        if there are pending commands or interrupts from other devices
  13        sharing the same IRQ.
  142.      Authors email-id domain name changed from lsil.com to lsi.com.
  15        Also modified the MODULE_AUTHOR to megaraidlinux@lsi.com
  16
  17Release Date    : Fri May 19 09:31:45 EST 2006 - Seokmann Ju <sju@lsil.com>
  18Current Version : 2.20.4.9 (scsi module), 2.20.2.6 (cmm module)
  19Older Version   : 2.20.4.8 (scsi module), 2.20.2.6 (cmm module)
  20
  211.      Fixed a bug in megaraid_init_mbox().
  22        Customer reported "garbage in file on x86_64 platform".
  23        Root Cause: the driver registered controllers as 64-bit DMA capable
  24        for those which are not support it.
  25        Fix: Made change in the function inserting identification machanism
  26        identifying 64-bit DMA capable controllers.
  27
  28        > -----Original Message-----
  29        > From: Vasily Averin [mailto:vvs@sw.ru]
  30        > Sent: Thursday, May 04, 2006 2:49 PM
  31        > To: linux-scsi@vger.kernel.org; Kolli, Neela; Mukker, Atul;
  32        > Ju, Seokmann; Bagalkote, Sreenivas;
  33        > James.Bottomley@SteelEye.com; devel@openvz.org
  34        > Subject: megaraid_mbox: garbage in file
  35        >
  36        > Hello all,
  37        >
  38        > I've investigated customers claim on the unstable work of
  39        > their node and found a
  40        > strange effect: reading from some files leads to the
  41        >  "attempt to access beyond end of device" messages.
  42        >
  43        > I've checked filesystem, memory on the node, motherboard BIOS
  44        > version, but it
  45        > does not help and issue still has been reproduced by simple
  46        > file reading.
  47        >
  48        > Reproducer is simple:
  49        >
  50        > echo 0xffffffff >/proc/sys/dev/scsi/logging_level ;
  51        > cat /vz/private/101/root/etc/ld.so.cache >/tmp/ttt  ;
  52        > echo 0 >/proc/sys/dev/scsi/logging
  53        >
  54        > It leads to the following messages in dmesg
  55        >
  56        > sd_init_command: disk=sda, block=871769260, count=26
  57        > sda : block=871769260
  58        > sda : reading 26/26 512 byte blocks.
  59        > scsi_add_timer: scmd: f79ed980, time: 7500, (c02b1420)
  60        > sd 0:1:0:0: send 0xf79ed980                  sd 0:1:0:0:
  61        >         command: Read (10): 28 00 33 f6 24 ac 00 00 1a 00
  62        > buffer = 0xf7cfb540, bufflen = 13312, done = 0xc0366b40,
  63        > queuecommand 0xc0344010
  64        > leaving scsi_dispatch_cmnd()
  65        > scsi_delete_timer: scmd: f79ed980, rtn: 1
  66        > sd 0:1:0:0: done 0xf79ed980 SUCCESS        0 sd 0:1:0:0:
  67        >         command: Read (10): 28 00 33 f6 24 ac 00 00 1a 00
  68        > scsi host busy 1 failed 0
  69        > sd 0:1:0:0: Notifying upper driver of completion (result 0)
  70        > sd_rw_intr: sda: res=0x0
  71        > 26 sectors total, 13312 bytes done.
  72        > use_sg is 4
  73        > attempt to access beyond end of device
  74        > sda6: rw=0, want=1044134458, limit=951401367
  75        > Buffer I/O error on device sda6, logical block 522067228
  76        > attempt to access beyond end of device
  77
  782.      When INQUIRY with EVPD bit set issued to the MegaRAID controller,
  79        system memory gets corrupted.
  80        Root Cause: MegaRAID F/W handle the INQUIRY with EVPD bit set
  81        incorrectly.
  82        Fix: MegaRAID F/W has fixed the problem and being process of release,
  83        soon. Meanwhile, driver will filter out the request.
  84
  853.      One of member in the data structure of the driver leads unaligne
  86        issue on 64-bit platform.
  87        Customer reporeted "kernel unaligned access addrss" issue when
  88        application communicates with MegaRAID HBA driver.
  89        Root Cause: in uioc_t structure, one of member had misaligned and it
  90        led system to display the error message.
  91        Fix: A patch submitted to community from following folk.
  92
  93        > -----Original Message-----
  94        > From: linux-scsi-owner@vger.kernel.org
  95        > [mailto:linux-scsi-owner@vger.kernel.org] On Behalf Of Sakurai Hiroomi
  96        > Sent: Wednesday, July 12, 2006 4:20 AM
  97        > To: linux-scsi@vger.kernel.org; linux-kernel@vger.kernel.org
  98        > Subject: Re: Help: strange messages from kernel on IA64 platform
  99        >
 100        > Hi,
 101        >
 102        > I saw same message.
 103        >
 104        > When GAM(Global Array Manager) is started, The following
 105        > message output.
 106        > kernel: kernel unaligned access to 0xe0000001fe1080d4,
 107        > ip=0xa000000200053371
 108        >
 109        > The uioc structure used by ioctl is defined by packed,
 110        > the allignment of each member are disturbed.
 111        > In a 64 bit structure, the allignment of member doesn't fit 64 bit
 112        > boundary. this causes this messages.
 113        > In a 32 bit structure, we don't see the message because the allinment
 114        > of member fit 32 bit boundary even if packed is specified.
 115        >
 116        > patch
 117        > I Add 32 bit dummy member to fit 64 bit boundary. I tested.
 118        > We confirmed this patch fix the problem by IA64 server.
 119        >
 120        > **************************************************************
 121        > ****************
 122        > --- linux-2.6.9/drivers/scsi/megaraid/megaraid_ioctl.h.orig
 123        > 2006-04-03 17:13:03.000000000 +0900
 124        > +++ linux-2.6.9/drivers/scsi/megaraid/megaraid_ioctl.h
 125        > 2006-04-03 17:14:09.000000000 +0900
 126        > @@ -132,6 +132,10 @@
 127        >  /* Driver Data: */
 128        >          void __user *           user_data;
 129        >          uint32_t                user_data_len;
 130        > +
 131        > +        /* 64bit alignment */
 132        > +        uint32_t                pad_0xBC;
 133        > +
 134        >          mraid_passthru_t        __user *user_pthru;
 135        >
 136        >          mraid_passthru_t        *pthru32;
 137        > **************************************************************
 138        > ****************
 139
 140Release Date    : Mon Apr 11 12:27:22 EST 2006 - Seokmann Ju <sju@lsil.com>
 141Current Version : 2.20.4.8 (scsi module), 2.20.2.6 (cmm module)
 142Older Version   : 2.20.4.7 (scsi module), 2.20.2.6 (cmm module)
 143
 1441.      Fixed a bug in megaraid_reset_handler().
 145        Customer reported "Unable to handle kernel NULL pointer dereference
 146        at virtual address 00000000" when system goes to reset condition
 147        for some reason. It happened randomly.
 148        Root Cause: in the megaraid_reset_handler(), there is possibility not
 149        returning pending packets in the pend_list if there are multiple
 150        pending packets.
 151        Fix: Made the change in the driver so that it will return all packets
 152        in the pend_list.
 153
 1542.      Added change request.
 155        As found in the following URL, rmb() only didn't help the
 156        problem. I had to increase the loop counter to 0xFFFFFF. (6 F's)
 157        http://marc.theaimsgroup.com/?l=linux-scsi&m=110971060502497&w=2
 158
 159        I attached a patch for your reference, too.
 160        Could you check and get this fix in your driver?
 161
 162        Best Regards,
 163        Jun'ichi Nomura
 164
 165Release Date    : Fri Nov 11 12:27:22 EST 2005 - Seokmann Ju <sju@lsil.com>
 166Current Version : 2.20.4.7 (scsi module), 2.20.2.6 (cmm module)
 167Older Version   : 2.20.4.6 (scsi module), 2.20.2.6 (cmm module)
 168
 1691.      Sorted out PCI IDs to remove megaraid support overlaps.
 170        Based on the patch from Daniel, sorted out PCI IDs along with
 171        character node name change from 'megadev' to 'megadev_legacy' to avoid
 172        conflict.
 173        ---
 174        Hopefully we'll be getting the build restriction zapped much sooner, 
 175        but we should also be thinking about totally removing the hardware 
 176        support overlap in the megaraid drivers.
 177
 178        This patch pencils in a date of Feb 06 for this, and performs some 
 179        printk abuse in hope that existing legacy users might pick up on what's
 180        going on.
 181
 182        Signed-off-by: Daniel Drake <dsd@gentoo.org>
 183        ---
 184
 1852.      Fixed a issue: megaraid always fails to reset handler.
 186        ---
 187        I found that the megaraid driver always fails to reset the
 188        adapter with the following message:
 189                megaraid: resetting the host...
 190                megaraid mbox: reset sequence completed successfully
 191                megaraid: fast sync command timed out
 192                megaraid: reservation reset failed
 193        when the "Cluster mode" of the adapter BIOS is enabled.
 194        So, whenever the reset occurs, the adapter goes to
 195        offline and just become unavailable.
 196
 197        Jun'ichi Nomura [mailto:jnomura@mtc.biglobe.ne.jp]
 198        ---
 199
 200Release Date    : Mon Mar 07 12:27:22 EST 2005 - Seokmann Ju <sju@lsil.com>
 201Current Version : 2.20.4.6 (scsi module), 2.20.2.6 (cmm module)
 202Older Version   : 2.20.4.5 (scsi module), 2.20.2.5 (cmm module)
 203
 2041.      Added IOCTL backward compatibility.
 205        Convert megaraid_mm driver to new compat_ioctl entry points.
 206        I don't have easy access to hardware, so only compile tested.
 207                - Signed-off-by:Andi Kleen <ak@muc.de>
 208
 2092.      megaraid_mbox fix: wrong order of arguments in memset()
 210        That, BTW, shows why cross-builds are useful-the only indication of
 211        problem had been a new warning showing up in sparse output on alpha
 212        build (number of exceeding 256 got truncated).
 213                - Signed-off-by: Al Viro
 214                <viro@parcelfarce.linux.theplanet.co.uk>
 215
 2163.      Convert pci_module_init to pci_register_driver
 217        Convert from pci_module_init to pci_register_driver
 218        (from:http://kernelnewbies.org/KernelJanitors/TODO)
 219                - Signed-off-by: Domen Puncer <domen@coderock.org>
 220
 2214.      Use the pre defined DMA mask constants from dma-mapping.h
 222        Use the DMA_{64,32}BIT_MASK constants from dma-mapping.h when calling
 223        pci_set_dma_mask() or pci_set_consistend_dma_mask(). See
 224        http://marc.theaimsgroup.com/?t=108001993000001&r=1&w=2 for more
 225        details.
 226                Signed-off-by: Tobias Klauser <tklauser@nuerscht.ch>
 227                Signed-off-by: Domen Puncer <domen@coderock.org>
 228
 2295.      Remove SSID checking for Dobson, Lindsay, and Verde based products.
 230        Checking the SSVID/SSID for controllers which have Dobson, Lindsay,
 231        and Verde is unnecessary because device ID has been assigned by LSI
 232        and it is unique value. So, all controllers with these IOPs have to be
 233        supported by the driver regardless SSVID/SSID.
 234
 2356.      Date Thu, 27 Jan 2005 04:31:09 +0100 
 236        From Herbert Poetzl <> 
 237        Subject RFC: assert_spin_locked() for 2.6 
 238
 239        Greetings!
 240
 241        overcautious programming will kill your kernel ;)
 242        ever thought about checking a spin_lock or even
 243        asserting that it must be held (maybe just for
 244        spinlock debugging?) ...
 245
 246        there are several checks present in the kernel
 247        where somebody does a variation on the following:
 248
 249          BUG_ON(!spin_is_locked(&some_lock));
 250
 251        so what's wrong about that? nothing, unless you
 252        compile the code with CONFIG_DEBUG_SPINLOCK but 
 253        without CONFIG_SMP ... in which case the BUG()
 254        will kill your kernel ...
 255
 256        maybe it's not advised to make such assertions, 
 257        but here is a solution which works for me ...
 258        (compile tested for sh, x86_64 and x86, boot/run
 259        tested for x86 only)
 260
 261        best,
 262        Herbert
 263
 264                - Herbert Poetzl <herbert@13thfloor.at>, Thu, 27 Jan 2005
 265
 266Release Date    : Thu Feb 03 12:27:22 EST 2005 - Seokmann Ju <sju@lsil.com>
 267Current Version : 2.20.4.5 (scsi module), 2.20.2.5 (cmm module)
 268Older Version   : 2.20.4.4 (scsi module), 2.20.2.4 (cmm module)
 269
 2701.      Modified name of two attributes in scsi_host_template.
 271        On Wed, 2005-02-02 at 10:56 -0500, Ju, Seokmann wrote:
 272        > +     .sdev_attrs                     = megaraid_device_attrs,
 273        > +     .shost_attrs                    = megaraid_class_device_attrs,
 274
 275        These are, perhaps, slightly confusing names.
 276        The terms device and class_device have well defined meanings in the
 277        generic device model, neither of which is what you mean here.
 278        Why not simply megaraid_sdev_attrs and megaraid_shost_attrs?
 279
 280        Other than this, it looks fine to me too.
 281
 282Release Date    : Thu Jan 27 00:01:03 EST 2005 - Atul Mukker <atulm@lsil.com>
 283Current Version : 2.20.4.4 (scsi module), 2.20.2.5 (cmm module)
 284Older Version   : 2.20.4.3 (scsi module), 2.20.2.4 (cmm module)
 285
 2861.      Bump up the version of scsi module due to its conflict.
 287
 288Release Date    : Thu Jan 21 00:01:03 EST 2005 - Atul Mukker <atulm@lsil.com>
 289Current Version : 2.20.4.3 (scsi module), 2.20.2.5 (cmm module)
 290Older Version   : 2.20.4.2 (scsi module), 2.20.2.4 (cmm module)
 291
 2921.      Remove driver ioctl for logical drive to scsi address translation and
 293        replace with the sysfs attribute. To remove drives and change
 294        capacity, application shall now use the device attribute to get the
 295        logical drive number for a scsi device. For adding newly created
 296        logical drives, class device attribute would be required to uniquely
 297        identify each controller.
 298                - Atul Mukker <atulm@lsil.com>
 299
 300        "James, I've been thinking about this a little more, and you may be on
 301        to something here. Let each driver add files as such:"
 302
 303                - Matt Domsch <Matt_Domsch@dell.com>, 12.15.2004
 304                 linux-scsi mailing list
 305
 306
 307        "Then, if you simply publish your LD number as an extra parameter of
 308        the device, you can look through /sys to find it."
 309
 310                - James Bottomley <James.Bottomley@SteelEye.com>, 01.03.2005
 311                 linux-scsi mailing list
 312
 313
 314        "I don't see why not ... it's your driver, you can publish whatever
 315        extra information you need as scsi_device attributes; that was one of
 316        the designs of the extensible attribute system."
 317
 318                - James Bottomley <James.Bottomley@SteelEye.com>, 01.06.2005
 319                 linux-scsi mailing list
 320
 3212.      Add AMI megaraid support - Brian King <brking@charter.net>
 322                PCI_VENDOR_ID_AMI, PCI_DEVICE_ID_AMI_MEGARAID3,
 323                PCI_VENDOR_ID_AMI, PCI_SUBSYS_ID_PERC3_DC,
 324
 3253.      Make some code static - Adrian Bunk <bunk@stusta.de>
 326        Date:   Mon, 15 Nov 2004 03:14:57 +0100
 327
 328        The patch below makes some needlessly global code static.
 329        -wait_queue_head_t wait_q;
 330        +static wait_queue_head_t wait_q;
 331
 332        Signed-off-by: Adrian Bunk <bunk@stusta.de>
 333
 3344.      Added NEC ROMB support - NEC MegaRAID PCI Express ROMB controller
 335                PCI_VENDOR_ID_LSI_LOGIC, PCI_DEVICE_ID_MEGARAID_NEC_ROMB_2E,
 336                PCI_SUBSYS_ID_NEC, PCI_SUBSYS_ID_MEGARAID_NEC_ROMB_2E,
 337
 3385.      Fixed Tape drive issue : For any Direct CDB command to physical device
 339        including tape, timeout value set by driver was 10 minutes. With this 
 340        value, most of command will return within timeout. However, for those
 341        command like ERASE or FORMAT, it takes more than an hour depends on
 342        capacity of the device and the command could be terminated before it 
 343        completes.
 344        To address this issue, the 'timeout' field in the DCDB command will 
 345        have NO TIMEOUT (i.e., 4) value as its timeout on DCDB command.
 346
 347
 348
 349Release Date    : Thu Dec  9 19:10:23 EST 2004
 350        - Sreenivas Bagalkote <sreenib@lsil.com>
 351
 352Current Version : 2.20.4.2 (scsi module), 2.20.2.4 (cmm module)
 353Older Version   : 2.20.4.1 (scsi module), 2.20.2.3 (cmm module)
 354
 355i.      Introduced driver ioctl that returns scsi address for a given ld.
 356        
 357        "Why can't the existing sysfs interfaces be used to do this?"
 358                - Brian King (brking@us.ibm.com)
 359        
 360        "I've looked into solving this another way, but I cannot see how
 361        to get this driver-private mapping of logical drive number-> HCTL
 362        without putting code something like this into the driver."
 363
 364        "...and by providing a mapping a function to userspace, the driver
 365        is free to change its mapping algorithm in the future if necessary .."
 366                - Matt Domsch (Matt_Domsch@dell.com)
 367
 368Release Date    : Thu Dec  9 19:02:14 EST 2004 - Sreenivas Bagalkote <sreenib@lsil.com>
 369
 370Current Version : 2.20.4.1 (scsi module), 2.20.2.3 (cmm module)
 371Older Version   : 2.20.4.1 (scsi module), 2.20.2.2 (cmm module)
 372
 373i.      Fix a bug in kioc's dma buffer deallocation
 374
 375Release Date    : Thu Nov  4 18:24:56 EST 2004 - Sreenivas Bagalkote <sreenib@lsil.com>
 376
 377Current Version : 2.20.4.1 (scsi module), 2.20.2.2 (cmm module)
 378Older Version   : 2.20.4.0 (scsi module), 2.20.2.1 (cmm module)
 379
 380i.      Handle IOCTL cmd timeouts more properly.
 381
 382ii.     pci_dma_sync_{sg,single}_for_cpu was introduced into megaraid_mbox
 383        incorrectly (instead of _for_device). Changed to appropriate 
 384        pci_dma_sync_{sg,single}_for_device.
 385
 386Release Date    : Wed Oct 06 11:15:29 EDT 2004 - Sreenivas Bagalkote <sreenib@lsil.com>
 387Current Version : 2.20.4.0 (scsi module), 2.20.2.1 (cmm module)
 388Older Version   : 2.20.4.0 (scsi module), 2.20.2.0 (cmm module)
 389
 390i.      Remove CONFIG_COMPAT around register_ioctl32_conversion
 391
 392Release Date    : Mon Sep 27 22:15:07 EDT 2004 - Atul Mukker <atulm@lsil.com>
 393Current Version : 2.20.4.0 (scsi module), 2.20.2.0 (cmm module)
 394Older Version   : 2.20.3.1 (scsi module), 2.20.2.0 (cmm module)
 395
 396i.      Fix data corruption. Because of a typo in the driver, the IO packets
 397        were wrongly shared by the ioctl path. This causes a whole IO command
 398        to be replaced by an incoming ioctl command.
 399
 400Release Date    : Tue Aug 24 09:43:35 EDT 2004 - Atul Mukker <atulm@lsil.com>
 401Current Version : 2.20.3.1 (scsi module), 2.20.2.0 (cmm module)
 402Older Version   : 2.20.3.0 (scsi module), 2.20.2.0 (cmm module)
 403
 404i.      Function reordering so that inline functions are defined before they
 405        are actually used. It is now mandatory for GCC 3.4.1 (current stable)
 406
 407        Declare some heavy-weight functions to be non-inlined,
 408        megaraid_mbox_build_cmd, megaraid_mbox_runpendq,
 409        megaraid_mbox_prepare_pthru, megaraid_mbox_prepare_epthru,
 410        megaraid_busywait_mbox
 411
 412                - Andrew Morton, 08.19.2004
 413                linux-scsi mailing list
 414
 415        "Something else to clean up after inclusion: every instance of an
 416        inline function is actually rendered as a full function call, because
 417        the function is always used before it is defined.  Atul, please
 418        re-arrange the code to eliminate the need for most (all) of the
 419        function prototypes at the top of each file, and define (not just
 420        declare with a prototype) each inline function before its first use"
 421
 422                - Matt Domsch <Matt_Domsch@dell.com>, 07.27.2004
 423                linux-scsi mailing list
 424
 425
 426ii.     Display elapsed time (countdown) while waiting for FW to boot.
 427
 428iii.    Module compilation reorder in Makefile so that unresolved symbols do
 429        not occur when driver is compiled non-modular.
 430
 431                Patrick J. LoPresti <patl@users.sourceforge.net>, 8.22.2004
 432                linux-scsi mailing list
 433
 434
 435Release Date    : Thu Aug 19 09:58:33 EDT 2004 - Atul Mukker <atulm@lsil.com>
 436Current Version : 2.20.3.0 (scsi module), 2.20.2.0 (cmm module)
 437Older Version   : 2.20.2.0 (scsi module), 2.20.1.0 (cmm module)
 438
 439i.      When copying the mailbox packets, copy only first 14 bytes (for 32-bit
 440        mailboxes) and only first 22 bytes (for 64-bit mailboxes). This is to
 441        avoid getting the stale values for busy bit. We want to set the busy
 442        bit just before issuing command to the FW.
 443
 444ii.     In the reset handling, if the reseted command is not owned by the
 445        driver, do not (wrongly) print information for the "attached" driver
 446        packet.
 447
 448iii.    Have extended wait when issuing command in synchronous mode. This is
 449        required for the cases where the option ROM is disabled and there is
 450        no BIOS to start the controller. The FW starts to boot after receiving
 451        the first command from the driver. The current driver has 1 second
 452        timeout for the synchronous commands, which is far less than what is
 453        actually required. We now wait up to MBOX_RESET_TIME (180 seconds) for
 454        FW boot process.
 455
 456iv.     In megaraid_mbox_product_info, clear the mailbox contents completely
 457        before preparing the command for inquiry3. This is to ensure that the
 458        FW does not get junk values in the command.
 459
 460v.      Do away with the redundant LSI_CONFIG_COMPAT redefinition for
 461        CONFIG_COMPAT. Replace <asm/ioctl32.h> with <linux/ioctl32.h>
 462
 463                - James Bottomley <James.Bottomley@SteelEye.com>, 08.17.2004
 464                 linux-scsi mailing list
 465
 466vi.     Add support for 64-bit applications. Current drivers assume only
 467        32-bit applications, even on 64-bit platforms. Use the "data" and
 468        "buffer" fields of the mimd_t structure, instead of embedded 32-bit
 469        addresses in application mailbox and passthru structures.
 470
 471vii.    Move the function declarations for the management module from
 472        megaraid_mm.h to megaraid_mm.c
 473
 474                - Andrew Morton, 08.19.2004
 475                linux-scsi mailing list
 476
 477viii.   Change default values for MEGARAID_NEWGEN, MEGARAID_MM, and
 478        MEGARAID_MAILBOX to 'n' in Kconfig.megaraid
 479
 480                - Andrew Morton, 08.19.2004
 481                linux-scsi mailing list
 482
 483ix.     replace udelay with msleep
 484
 485x.      Typos corrected in comments and whitespace adjustments, explicit
 486        grouping of expressions.
 487
 488
 489Release Date    : Fri Jul 23 15:22:07 EDT 2004 - Atul Mukker <atulm@lsil.com>
 490Current Version : 2.20.2.0 (scsi module), 2.20.1.0 (cmm module)
 491Older Version   : 2.20.1.0 (scsi module), 2.20.0.0 (cmm module)
 492
 493i.      Add PCI ids for Acer ROMB 2E solution
 494
 495ii.     Add PCI ids for I4
 496
 497iii.    Typo corrected for subsys id for megaraid sata 300-4x
 498
 499iv.     Remove yield() while mailbox handshake in synchronous commands
 500
 501
 502        "My other main gripe is things like this:
 503
 504        +       // wait for maximum 1 second for status to post
 505        +       for (i = 0; i < 40000; i++) {
 506        +               if (mbox->numstatus != 0xFF) break;
 507        +               udelay(25); yield();
 508        +       }
 509
 510        which litter the driver.  Use of yield() in drivers is deprecated."
 511
 512                - James Bottomley <James.Bottomley@SteelEye.com>, 07.14.2004
 513                 linux-scsi mailing list
 514
 515v.      Remove redundant __megaraid_busywait_mbox routine
 516
 517vi.     Fix bug in the management module, which causes a system lockup when the
 518        IO module is loaded and then unloaded, followed by executing any
 519        management utility. The current version of management module does not
 520        handle the adapter unregister properly.
 521
 522        Specifically, it still keeps a reference to the unregistered
 523        controllers. To avoid this, the static array adapters has been
 524        replaced by a dynamic list, which gets updated every time an adapter
 525        is added or removed.
 526
 527        Also, during unregistration of the IO module, the resources are
 528        now released in the exact reverse order of the allocation time
 529        sequence.
 530
 531
 532Release Date    : Fri Jun 25 18:58:43 EDT 2004 - Atul Mukker <atulm@lsil.com>
 533Current Version : 2.20.1.0
 534Older Version   : megaraid 2.20.0.1
 535
 536i.      Stale list pointer in adapter causes kernel panic when module
 537        megaraid_mbox is unloaded
 538
 539
 540Release Date    : Thu Jun 24 20:37:11 EDT 2004 - Atul Mukker <atulm@lsil.com>
 541Current Version : 2.20.0.1
 542Older Version   : megaraid 2.20.0.00
 543
 544i.      Modules are not 'y' by default, but depend on current definition of
 545        SCSI & PCI.
 546
 547ii.     Redundant structure mraid_driver_t removed.
 548
 549iii.    Miscellaneous indentation and goto/label fixes.
 550                - Christoph Hellwig <hch@infradead.org>, 06.24.2004 linux-scsi
 551
 552iv.     scsi_host_put(), do just before completing HBA shutdown.
 553
 554
 555
 556Release Date    : Mon Jun 21 19:53:54 EDT 2004 - Atul Mukker <atulm@lsil.com>
 557Current Version : 2.20.0.0
 558Older Version   : megaraid 2.20.0.rc2 and 2.00.3
 559
 560i.      Independent module to interact with userland applications and
 561        multiplex command to low level RAID module(s).
 562
 563        "Shared code in a third module, a "library module", is an acceptable
 564        solution. modprobe automatically loads dependent modules, so users
 565        running "modprobe driver1" or "modprobe driver2" would automatically
 566        load the shared library module."
 567
 568                - Jeff Garzik <jgarzik@pobox.com> 02.25.2004 LKML
 569
 570        "As Jeff hinted, if your userspace<->driver API is consistent between
 571        your new MPT-based RAID controllers and your existing megaraid driver,
 572        then perhaps you need a single small helper module (lsiioctl or some
 573        better name), loaded by both mptraid and megaraid automatically, which
 574        handles registering the /dev/megaraid node dynamically. In this case,
 575        both mptraid and megaraid would register with lsiioctl for each
 576        adapter discovered, and lsiioctl would essentially be a switch,
 577        redirecting userspace tool ioctls to the appropriate driver."
 578
 579                - Matt Domsch <Matt_Domsch@dell.com> 02.25.2004 LKML
 580
 581ii.     Remove C99 initializations from pci_device id.
 582
 583        "pci_id_table_g would be much more readable when not using C99
 584        initializers.
 585        PCI table doesn't change, there's lots of users that prefer the more
 586        readable variant.  And it's really far less and much easier to grok
 587        lines without C99 initializers."
 588
 589                - Christoph Hellwig <hch@infradead.org>, 05.28.2004 linux-scsi
 590
 591iii.    Many fixes as suggested by Christoph Hellwig <hch@infradead.org> on
 592        linux-scsi, 05.28.2004
 593
 594iv.     We now support up to 32 parallel ioctl commands instead of current 1.
 595        There is a conscious effort to let memory allocation not fail for ioctl
 596        commands.
 597
 598v.      Do away with internal memory management. Use pci_pool_(create|alloc)
 599        instead.
 600
 601vi.     Kill tasklet when unloading the driver.
 602
 603vii.    Do not use "host_lock', driver has fine-grain locks now to protect all
 604        data structures.
 605
 606viii.   Optimize the build scatter-gather list routine. The callers already
 607        know the data transfer address and length.
 608
 609ix.     Better implementation of error handling and recovery. Driver now
 610        performs extended errors recovery for instances like scsi cable pull.
 611
 612x.      Disassociate the management commands with an overlaid scsi command.
 613        Driver now treats the management packets as special packets and has a
 614        dedicated callback routine.
 615
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