Commit graph

21 commits

Author SHA1 Message Date
Stephen M. Cameron
fec62c368b [SCSI] hpsa: do not attempt to read from a write-only register
Most smartarrays tolerate it, but a few new ones don't.
Without this change some newer Smart Arrays will lock up
and i/o will grind to a halt.

Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Cc: stable@kernel.org
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
2011-07-27 15:18:26 +04:00
Stephen M. Cameron
64670ac870 [SCSI] hpsa: do soft reset if hard reset is broken
on driver load, if reset_devices is set, and the hard reset
attempts fail, try to bring up the controller to the point that
a command can be sent, and send it a soft reset command, then
after the reset undo whatever driver initialization was done to get
it to the point to take a command, and re-do it after the reset.

This is to get kdump to work on all the "non-resettable" controllers
(except 64xx controllers which can't be reset due to the potentially
shared cache module.)

Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: James Bottomley <jbottomley@parallels.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2011-05-17 11:07:28 +04:00
Stephen M. Cameron
2ed7127bce [SCSI] hpsa: increase time to wait for board reset
Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: James Bottomley <jbottomley@parallels.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2011-05-17 11:05:41 +04:00
Stephen M. Cameron
516fda49e8 [SCSI] hpsa: wait longer for no-op to complete after resetting controller
This is to avoid the usual two or three messages about the command
timing out.  We're obviously not waiting long enough.

Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: James Bottomley <jbottomley@parallels.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2011-05-17 11:04:32 +04:00
Stephen M. Cameron
8cd21da71c [SCSI] hpsa: add readl after writel in interrupt mask setting code
This is to ensure the board interrupts are really off when
these functions return.

Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: James Bottomley <jbottomley@parallels.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2011-05-17 11:02:56 +04:00
Stephen M. Cameron
d0be5ec869 [SCSI] hpsa: do readl after writel in main i/o path to ensure commands don't get lost.
Apparently we've been doin it rong for a decade, but only lately do we
run into problems.

Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: James Bottomley <jbottomley@parallels.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2011-05-17 11:01:43 +04:00
Stephen M. Cameron
a9a3a2739a [SCSI] hpsa: make hpsa.hpsa_simple_mode=1 module parameter actually work
It's not enough to simple avoid putting the board into performant
mode, as we have to set up the interrupts differently, etc.  When
I originally tested this module parameter, I tested it incorrectly
without realizing it, and the driver was running in performant mode
the whole time unbeknownst to me.

Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2011-02-18 12:32:30 -06:00
Stephen M. Cameron
9e0fc764ea [SCSI] hpsa: do not re-order commands in internal queues
Driver's internal queues should be FIFO, not LIFO.
This is a port of an almost identical patch from cciss by Jens Axboe.

Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2011-02-18 12:31:19 -06:00
Stephen M. Cameron
fe5389c87f [SCSI] hpsa: fix board status waiting code
After a reset, we should first wait for the board to become "not ready",
and then wait for it to become "ready", instead of immediately
waiting for it to become "ready", and do this waiting *after*
restoring PCI config space registers.  Also, only wait 10 secs
for board to become "not ready" after a reset (it should quickly
become not ready.)

Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2011-01-24 11:29:32 -06:00
Stephen M. Cameron
a0b89872b3 [SCSI] hpsa: do not consider firmware revision when looking for device changes.
The firmware may have been updated, in which case, it's the same device,
and in that case, we do not want to remove and add the device, we want to
let it continue as is.

Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2010-12-21 12:37:26 -06:00
Stephen M. Cameron
873f339fc5 [SCSI] hpsa: remove unused firm_ver member of the per-hba structure
Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2010-07-27 12:01:15 -05:00
Stephen M. Cameron
33a2ffce51 [SCSI] hpsa: Increase the number of scatter gather elements supported.
This uses the scatter-gather chaining feature of Smart Array
controllers.  32 scatter-gather elements are embedded in the
"command list", and the last element in the list may be marked
as a "chain pointer", and point to an additional block of
scatter gather elements.  The precise number of scatter gather
elements supported is dependent on the particular kind of
Smart Array, and is determined at runtime by querying the
hardware.

Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2010-03-03 18:37:22 +05:30
Mike Miller
31468401cc [SCSI] hpsa: remove scan thread
The intent of the scan thread was to allow a UNIT ATTENTION/LUN
DATA CHANGED condition encountered in the interrupt handler
to trigger a rescan of devices, which can't be done in interrupt
context.  However, we weren't able to get this to work, due to
multiple such UNIT ATTENTION conditions arriving during the rescan,
during updating of the SCSI mid layer, etc.  There's no way to tell
the devices, "stand still while I scan you!"  Since it doesn't work,
there's no point in having the thread, as the rescan triggered via
ioctl or sysfs can be done without such a thread.

Signed-off-by: Mike Miller <mikem@beardog.cce.hp.com>
Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2010-03-03 18:36:48 +05:30
Stephen M. Cameron
a08a8471b7 [SCSI] hpsa: use scan_start and scan_finished entry points for scanning
use scan_start and scan_finished entry points for scanning and route
the CCISS_REGNEWD ioctl and sysfs triggering of same functionality
through hpsa_scan_start.

Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2010-02-17 13:22:16 -06:00
Stephen M. Cameron
339b2b14c6 [SCSI] hpsa: Fix p1210m LUN assignment.
The p1210m responsds to SCSI report LUNs, unlike traditional Smart
Array controllers.  This means that the bus, target, and lun
assignments done by the driver cannot be arbitrary, but must match
what SCSI REPORT LUNS returns.

Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2010-02-17 13:20:59 -06:00
Don Brace
303932fd4f [SCSI] hpsa: Allow multiple command completions per interrupt.
This is done by adding support for the so-called "performant mode"
(that's really what they called it).  Smart Array controllers
have a mode which enables multiple command completions to be
delivered with a single interrupt, "performant" mode.  We want to use
that mode, as some newer controllers will be requiring this mode.

Signed-off-by: Don Brace <brace@beardog.cce.hp.com>
Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: Mike Miller <mikem@beardog.cce.hp.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2010-02-17 13:20:26 -06:00
Stephen M. Cameron
900c54404a [SCSI] hpsa: interrupt pending function should return bool not unsigned long
Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2010-02-17 13:19:52 -06:00
Stephen M. Cameron
84ca0be2a2 [SCSI] hpsa: fix some debug printks to use dev_dbg instead
Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2010-02-17 13:19:37 -06:00
Stephen M. Cameron
a104c99f38 [SCSI] hpsa: make tag macros into functions
Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2010-02-17 13:19:25 -06:00
Stephen M. Cameron
01a02ffcd5 [SCSI] hpsa: Use kernel integer types, not userland ones
That is, use u64, u32, u16 and u8 rather than __u64, __u32, __u16 and __u8.

Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2010-02-17 13:17:00 -06:00
Stephen M. Cameron
edd163687e [SCSI] hpsa: add driver for HP Smart Array controllers.
This driver supports a subset of HP Smart Array Controllers.
It is a SCSI alternative to the cciss driver.

[akpm@linux-foundation.org: avoid helpful cleanup patches]
[achiang@hp.com: make device attrs static]
[akpm@linux-foundation.org: msleep() does set_current_state() itself]
Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: Mike Miller <mikem@beardog.cce.hp.com>
Signed-off-by: Alex Chiang <achiang@hp.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
2009-12-10 09:55:00 -06:00