Eric Lee / smarc-fsl-linux-kernel

16 Nov, 2011

1 commit

  • 0007a4c90   cciss: auto engage SCSI mid layer at driver load time ... Browse Code »

    A long time ago, probably in 2002, one of the distros, or maybe more than
    one, loaded block drivers prior to loading the SCSI mid layer. This meant
    that the cciss driver, being a block driver, could not engage the SCSI mid
    layer at init time without panicking, and relied on being poked by a
    userland program after the system was up (and the SCSI mid layer was
    therefore present) to engage the SCSI mid layer.

    This is no longer the case, and cciss can safely rely on the SCSI mid
    layer being present at init time and engage the SCSI mid layer straight
    away. This means that users will see their tape drives and medium
    changers at driver load time without need for a script in /etc/rc.d that
    does this:

    for x in /proc/driver/cciss/cciss*
    do
    echo "engage scsi" > $x
    done

    However, if no tape drives or medium changers are detected, the SCSI mid
    layer will not be engaged. If a tape drive or medium change is later
    hot-added to the system it will then be necessary to use the above script
    or similar for the device(s) to be acceesible.

    Signed-off-by: Stephen M. Cameron
    Signed-off-by: Andrew Morton
    Signed-off-by: Jens Axboe

    Stephen M. Cameron
     

27 Jul, 2011

1 commit

  • 60063497a   atomic: use <linux/atomic.h> ... Browse Code »

    This allows us to move duplicated code in
    (atomic_inc_not_zero() for now) to

    Signed-off-by: Arun Sharma
    Reviewed-by: Eric Dumazet
    Cc: Ingo Molnar
    Cc: David Miller
    Cc: Eric Dumazet
    Acked-by: Mike Frysinger
    Signed-off-by: Andrew Morton
    Signed-off-by: Linus Torvalds

    Arun Sharma
     

06 May, 2011

1 commit

  • 8a4ec67bd   cciss: add cciss_tape_cmds module paramter ... Browse Code »

    This is to allow number of commands reserved for use by SCSI tape drives
    and medium changers to be adjusted at driver load time via the kernel
    parameter cciss_tape_cmds, with a default value of 6, and a range
    of 2 - 16 inclusive. Previously, the driver limited the number of
    commands which could be queued to the SCSI half of the the driver
    to only 2. This is to fix the problem that if you had more than
    two tape drives, you couldn't, for example, erase or rewind them all
    at the same time.

    Signed-off-by: Stephen M. Cameron
    Signed-off-by: Jens Axboe

    Stephen M. Cameron
     

12 Mar, 2011

3 commits

17 Nov, 2010

1 commit

  • f281233d3   SCSI host lock push-down ... Browse Code »

    Move the mid-layer's ->queuecommand() invocation from being locked
    with the host lock to being unlocked to facilitate speeding up the
    critical path for drivers who don't need this lock taken anyway.

    The patch below presents a simple SCSI host lock push-down as an
    equivalent transformation. No locking or other behavior should change
    with this patch. All existing bugs and locking orders are preserved.

    Additionally, add one parameter to queuecommand,
    struct Scsi_Host *
    and remove one parameter from queuecommand,
    void (*done)(struct scsi_cmnd *)

    Scsi_Host* is a convenient pointer that most host drivers need anyway,
    and 'done' is redundant to struct scsi_cmnd->scsi_done.

    Minimal code disturbance was attempted with this change. Most drivers
    needed only two one-line modifications for their host lock push-down.

    Signed-off-by: Jeff Garzik
    Acked-by: James Bottomley
    Signed-off-by: Linus Torvalds

    Jeff Garzik
     

08 Aug, 2010

6 commits

  • b2a4a43db   cciss: change printks to dev_warn, etc. ... Browse Code »

    cciss: change printks to dev_warn, etc.

    Signed-off-by: Stephen M. Cameron
    Signed-off-by: Jens Axboe

    Stephen M. Cameron
     
  • 6b4d96b87   cciss: separate cmd_alloc() and cmd_special_alloc() ... Browse Code »

    cciss: separate cmd_alloc() and cmd_special_alloc()
    cmd_alloc() took a parameter which caused it to either allocate
    from a pre-allocated pool, or allocate using pci_alloc_consistent.
    This parameter is always known at compile time, so this would
    be better handled by breaking the function into two functions
    and differentiating the cases by function names. Same goes
    for cmd_free().

    Signed-off-by: Stephen M. Cameron
    Signed-off-by: Jens Axboe

    Stephen M. Cameron
     
  • f70dba836   cciss: use consistent variable names ... Browse Code »

    cciss: use consistent variable names
    "h", for the hba structure and "c" for the command structures.
    and get rid of trivial CCISS_LOCK macro.

    Signed-off-by: Stephen M. Cameron
    Signed-off-by: Jens Axboe

    Stephen M. Cameron
     
  • 373b45f7b   cciss: Set the performant mode bit in the scsi half of the driver ... Browse Code »

    cciss: Set the performant mode bit in the scsi half of the driver
    In a couple of places, the performant mode bit wasn't being set in
    the scsi half of the driver, causing commands to seem to hang. Use
    enqueue_cmd_and_start_io() where appropriate. This fixes a bug that

    echo engage scsi > /proc/driver/cciss/cciss0

    would hang.

    Signed-off-by: Stephen M. Cameron
    Signed-off-by: Jens Axboe

    Stephen M. Cameron
     
  • b0dd5cad3   cciss: remove errant debug code ... Browse Code »

    Remove a debug statement left behind by accident Ths debug statement got
    left behind. It was commented out after use but not deleted.

    Signed-off-by: Mike Miller
    Cc: Stephen M. Cameron
    Signed-off-by: Andrew Morton
    Signed-off-by: Jens Axboe

    Mike Miller
     
  • 5e216153c   cciss: add performant mode support for Stars/Sirius ... Browse Code »

    Add a mode of controller operation called Performant Mode. Even though
    cciss has been deprecated in favor of hpsa there are new controllers due
    out next year that HP must support in older vendor distros. Vendors
    require all fixes/features be upstream. These new controllers support
    only 16 commands in simple mode but support up to 1024 in performant mode.
    This requires us to add this support at this late date.

    The performant mode transport minimizes host PCI accesses by performinf
    many completions per read. PCI writes are posted so the host can write
    then immediately get off the bus not waiting for the writwe to complete to
    the target. In the context of performant mode the host read out to a
    controller pulls all posted writes into host memory ensuring the reply
    queue is coherent.

    Signed-off-by: Mike Miller
    Cc: Stephen M. Cameron
    Signed-off-by: Andrew Morton
    Signed-off-by: Jens Axboe

    Mike Miller
     

15 Jun, 2010

1 commit

01 Jun, 2010

1 commit

01 Mar, 2010

4 commits

13 Nov, 2009

2 commits

09 Jun, 2009

4 commits

02 Jun, 2009

2 commits

  • 77b0308a0   cciss: use schedule_timeout_interruptible() ... Browse Code »

    Use schedule_timeout_interruptible() instead of open-coding the set and
    schedule parts.

    Cc: Mike Miller
    Cc: Stephen M. Cameron
    Signed-off-by: Andrew Morton
    Signed-off-by: Jens Axboe

    Andrew Morton
     
  • 88f627ae3   cciss: fix SCSI device reset handler ... Browse Code »

    Fix the SCSI reset error handler to send a working, properly addressed
    reset message to the target device and add code to wait for the target
    device to become ready by polling it with Test Unit Ready.

    The existing reset code was broken in that it didn't bother to set the
    8-byte LUN address to anything besides zero, so the command was addressed
    to the controller, which pretended to the driver that the command
    succeeded, while doing nothing. Ages ago I tested this code, but
    unbeknownst to me, my test was flawed, and what I thought was a tape drive
    getting reset was actually nothing of the sort. Unfortunately, there is
    still lots of Smartarray firmware that doesn't handle doing target resets
    right, and this code won't help in those cases, but it also shouldn't make
    things worse in those cases than they already are.

    Signed-off-by: Stephen M. Cameron
    Cc: Mike Miller
    Signed-off-by: Jens Axboe

    Stephen M. Cameron
     

09 Oct, 2008

1 commit

  • 905bd78f2   cciss: Fix cciss SCSI rescan code to better notice device changes ... Browse Code »

    Fix cciss SCSI rescan code to better notice device changes.
    If you hot-unplug a tape drive, then hot-plug a different
    tape drive into the same slot in a storage enclosure,
    the cciss driver wouldn't notice anything had changed, as
    it was only looking at the LUN address and device type.
    Now it looks at the inquiry page 0x83 device identifier,
    and vendor and model strings as well.

    Signed-off-by: Stephen M. Cameron
    Signed-off-by: Jens Axboe

    scameron@beardog.cca.cpqcorp.net
     

06 Aug, 2008

2 commits

21 Apr, 2008

1 commit

04 Mar, 2008

1 commit

03 Feb, 2008

1 commit

29 Oct, 2007

1 commit

  • bd4f36d6d   cciss: update copyright notices ... Browse Code »

    This patch updates the copyright information for the cciss driver. It
    includes extending the year to 2007 (how timely) and some minor corrections
    deemed necessary by HP legal and the Open Source Review Board. Please
    consider this patch for inclusion.

    Signed-off-by: Mike Miller
    --------------------------------------------------------------------------------
    Signed-off-by: Jens Axboe

    Mike Miller
     

30 May, 2007

1 commit

09 May, 2007

1 commit

01 Oct, 2006

1 commit

07 Aug, 2006

1 commit

  • 4ff36718e   [SCSI] Improve inquiry printing ... Browse Code »

    - Replace scsi_device_types array API with scsi_device_type function API.
    Gets rid of a lot of common code, as well as being easier to use.
    - Add the new device types in SPC4 r05a, and rename some of the older ones.
    - Reformat the printing of inquiry data; now fits on one line and
    includes PQ.

    I think I've addressed all the feedback from the previous versions. My
    current test box prints:

    scsi 2:0:1:0: Direct access HP 18.2G ATLAS10K3_18_SCA HP05 PQ: 0 ANSI: 2

    Signed-off-by: Matthew Wilcox
    Signed-off-by: James Bottomley

    Matthew Wilcox
     

06 Jun, 2006

1 commit

  • 5d5ff44fe   [SCSI] fix up request buffer reference in various scsi drivers ... Browse Code »

    Various scsi drivers use scsi_cmnd.buffer and scsi_cmnd.bufflen in their
    queuecommand functions. Those fields are internal storage for the
    midlayer only and are used to restore the original payload after
    request_buffer and request_bufflen have been overwritten for EH. Using
    the buffer and bufflen fields means they do very broken things in error
    handling.

    Signed-off-by: Christoph Hellwig
    Signed-off-by: James Bottomley

    Christoph Hellwig
     

27 Mar, 2006

1 commit