The hardware needs little endian scatter gather addresses and
lengths but we were not bothering to convert from cpu byte
order as we should have been.  On Intel, this is all just
a bunch of no-ops macros, but it makes the code endian-clean(er).
Signed-off-by: NDon Brace <don.brace@pmcs.com>
Signed-off-by: NRobert Elliott <elliott@hp.com>
Reviewed-by: NWebb Scales <webbnh@hp.com>
Signed-off-by: NChristoph Hellwig <hch@lst.de>

We were allocating roughly double the amount of memory
we should be due to ReportLUNdata and ExtendedReportLUNdata
containing a non-zero sized array but adding extra memory
to allocate as if the array were zero sized.

Track the logical and physical sizes separately.
Allocate the memory based on the specific data
structure sizes.
Signed-off-by: NDon Brace <don.brace@pmcs.com>
Reviewed-by: NWebb Scales <webb.scales@hp.com>
Signed-off-by: NChristoph Hellwig <hch@lst.de>

In the case of LUN data changing, the driver will
auto rescan and so it's not even true that "action" is
"required".

Remove "action required" phrases from warning messages and
replace with description phrases.
Signed-off-by: NDon Brace <don.brace@pmcs.com>
Reviewed-by: NStephen M. Cameron <stephenmcameron@gmail.com>
Reviewed-by: NJoe Handzik <joseph.t.handzik@hp.com>
Reviewed-by: NWebb Scales <webb.scales@hp.com>
Signed-off-by: NChristoph Hellwig <hch@lst.de>

Correct the size calculation of the chained SG block
Signed-off-by: NDon Brace <don.brace@pmcs.com>
Signed-off-by: NWebb Scales <webbnh@hp.com>
Reviewed-by: NStephen M. Cameron <stephenmcameron@gmail.com>
Reviewed-by: NDon Brace <don.brace@pmcs.com>
Signed-off-by: NChristoph Hellwig <hch@lst.de>

Fix a couple of pci id table mistakes:
Subdevice ID 0x3323 missing from product[] table
	(another name for HP Smart Storage 1210m)
Bogus 0x1925 subdevice id removed from hpsa_pci_device_id[] (no such thing.)
Signed-off-by: NDon Brace <don.brace@pmcs.com>
Reviewed-by: NWebb Scales <webbnh@hp.com>
Signed-off-by: NChristoph Hellwig <hch@lst.de>

RAID-1ADM is unusable with dev_warn called on every command.
Signed-off-by: NRobert Elliott <elliott@hp.com>
Signed-off-by: NDon Brace <don.brace@pmcs.com>
Reviewed-by: NStephen M. Cameron <stephenmcameron@gmail.com>
Reviewed-by: NWebb Scales <webbnh@hp.com>
Signed-off-by: NChristoph Hellwig <hch@lst.de>

Clean up issues reported when running sparse.
Signed-off-by: NDon Brace <don.brace@pmcs.com>
Reviewed-by: NWebb Scales <webb.scales@hp.com>
Signed-off-by: NChristoph Hellwig <hch@lst.de>

Remove the tagged argument from scsi_adjust_queue_depth, and just let it
handle the queue depth.  For most drivers those two are fairly separate,
given that most modern drivers don't care about the SCSI "tagged" status
of a command at all, and many old drivers allow queuing of multiple
untagged commands in the driver.

Instead we start out with the ->simple_tags flag set before calling
->slave_configure, which is how all drivers actually looking at
->simple_tags except for one worke anyway.  The one other case looks
broken, but I've kept the behavior as-is for now.

Except for that we only change ->simple_tags from the ->change_queue_type,
and when rejecting a tag message in a single driver, so keeping this
churn out of scsi_adjust_queue_depth is a clear win.

Now that the usage of scsi_adjust_queue_depth is more obvious we can
also remove all the trivial instances in ->slave_alloc or ->slave_configure
that just set it to the cmd_per_lun default.
Signed-off-by: NChristoph Hellwig <hch@lst.de>
Reviewed-by: NMike Christie <michaelc@cs.wisc.edu>
Reviewed-by: NHannes Reinecke <hare@suse.de>
Reviewed-by: NMartin K. Petersen <martin.petersen@oracle.com>

Add a call to pci_set_master(...)  missing in the previous
patch "hpsa: refine the pci enable/disable handling".
Found thanks to Rob Elliot.
Signed-off-by: NTomas Henzl <thenzl@redhat.com>
Reviewed-by: NRobert Elliott <elliott@hp.com>
Tested-by: NRobert Elliott <elliott@hp.com>
Signed-off-by: NChristoph Hellwig <hch@lst.de>

When a second(kdump) kernel starts and the hard reset method is used
the driver calls pci_disable_device without previously enabling it,
so the kernel shows a warning -
[   16.876248] WARNING: at drivers/pci/pci.c:1431 pci_disable_device+0x84/0x90()
[   16.882686] Device hpsa
disabling already-disabled device
...
This patch fixes it, in addition to this I tried to balance also some other pairs
of enable/disable device in the driver.
Unfortunately I wasn't able to verify the functionality for the case of a sw reset,
because of a lack of proper hw.
Signed-off-by: NTomas Henzl <thenzl@redhat.com>
Reviewed-by: NStephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: NChristoph Hellwig <hch@lst.de>

As result of deprecation of MSI-X/MSI enablement functions
pci_enable_msix() and pci_enable_msi_block() all drivers
using these two interfaces need to be updated to use the
new pci_enable_msi_range()  or pci_enable_msi_exact()
and pci_enable_msix_range() or pci_enable_msix_exact()
interfaces.
Signed-off-by: NAlexander Gordeev <agordeev@redhat.com>
Acked-by: N"Stephen M. Cameron" <scameron@beardog.cce.hp.com>
Cc: iss_storagedev@hp.com
Cc: linux-scsi@vger.kernel.org
Cc: linux-pci@vger.kernel.org
Signed-off-by: NChristoph Hellwig <hch@lst.de>

Currently the driver falls back to INTx mode when MSI-X
initialization failed. This is a suboptimal behaviour
for chips that also support MSI. This update changes that
behaviour and falls back to MSI mode in case MSI-X mode
initialization failed.
Signed-off-by: NAlexander Gordeev <agordeev@redhat.com>
Acked-by: N"Stephen M. Cameron" <scameron@beardog.cce.hp.com>
Cc: iss_storagedev@hp.com
Cc: linux-scsi@vger.kernel.org
Cc: linux-pci@vger.kernel.org
Signed-off-by: NChristoph Hellwig <hch@lst.de>

Remove the now unnecessary memset too.
Signed-off-by: NJoe Perches <joe@perches.com>
Cc: Adam Radford <linuxraid@lsi.com>
Cc: "James E.J. Bottomley" <JBottomley@parallels.com>
Cc: Jayamohan Kallickal <jayamohan.kallickal@emulex.com>
Cc: Dario Ballabio <ballabio_dario@emc.com>
Cc: Michael Neuffer <mike@i-Connect.Net>
Cc: "Stephen M. Cameron" <scameron@beardog.cce.hp.com>
Cc: Neela Syam Kolli <megaraidlinux@lsi.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

When copy_from_user fails, return -EFAULT, not -ENOMEM
Signed-off-by: NStephen M. Cameron <scameron@beardog.cce.hp.com>
Reported-by: NRobert Elliott <elliott@hp.com>
Reviewed-by: NJoe Handzik <joseph.t.handzik@hp.com>
Reviewed-by: NScott Teel <scott.teel@hp.com>
Reviewed by: Mike MIller <michael.miller@canonical.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: NChristoph Hellwig <hch@lst.de>

When devices come on line, they should be removed from the list of
offline devices that are monitored.
Signed-off-by: NStephen M. Cameron <scameron@beardog.cce.hp.com>
Reviewed-by: NScott Teel <scott.teel@hp.com>
Reviewed-by: NJoe Handzik <joseph.t.handzik@hp.com>
Reviewed by: Mike MIller <michael.miller@canonical.com>
Signed-off-by: NChristoph Hellwig <hch@lst.de>

commit 28e13446 "[SCSI] hpsa: enable unit attention reporting"
turns on unit attention notifications, but got the change wrong for
all architectures other than x86, which now store an uninitialized
value into the device register.

Gcc helpfully warns about this:

../drivers/scsi/hpsa.c: In function 'hpsa_set_driver_support_bits':
../drivers/scsi/hpsa.c:6373:17: warning: 'driver_support' is used uninitialized in this function [-Wuninitialized]
  driver_support |= ENABLE_UNIT_ATTN;
                 ^

This moves the #ifdef so only the prefetch-enable is conditional
on x86, not also reading the initial register contents.
Signed-off-by: NArnd Bergmann <arnd@arndb.de>
Fixes: 28e13446 "[SCSI] hpsa: enable unit attention reporting"
Cc: stable@vger.kernel.org # v3.14+
Acked-by: NStephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: NChristoph Hellwig <hch@lst.de>

Signed-off-by: NRobert Elliott <elliott@hp.com>
Signed-off-by: NStephen M. Cameron <scameron@beardog.cce.hp.com>
Reviewed-by: NStephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: NChristoph Hellwig <hch@lst.de>

a 6-byte READ/WRITE CDB with a 0 block data transfer really
means a 256 block data transfer.  The RAID mapping code failed
to handle this case.  For 10/12/16 byte READ/WRITEs, 0 just means
no data should be transferred, and should not trigger BUG_ON.
Signed-off-by: NStephen M. Cameron <scameron@beardog.cce.hp.com>
Reported-by: NRobert Elliott <elliott@hp.com>
Reviewed-by: NRobert Elliott <elliott@hp.com>
Signed-off-by: NChristoph Hellwig <hch@lst.de>

Signed-off-by: NStephen M. Cameron <scameron@beardog.cce.hp.com>
Reviewed-by: NJoe Handzik <joseph.t.handzik@hp.com>
Signed-off-by: NChristoph Hellwig <hch@lst.de>

The SCSI standard defines 64-bit values for LUNs, and large arrays
employing large or hierarchical LUN numbers become more and more
common.

So update the linux SCSI stack to use 64-bit LUN numbers.
Signed-off-by: NHannes Reinecke <hare@suse.de>
Reviewed-by: NChristoph Hellwig <hch@infradead.org>
Reviewed-by: NEwan Milne <emilne@redhat.com>
Signed-off-by: NChristoph Hellwig <hch@lst.de>

Make return value an int instead of an unsigned char so that
we do not lose negative error return values.
Signed-off-by: NStephen M. Cameron <scameron@beardog.cce.hp.com>
Reviewed-by: NWebb Scales <webb.scales@hp.com>
Reported-by: NDan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: NChristoph Hellwig <hch@lst.de>

Signed-off-by: NStephen M. Cameron <scameron@beardog.cce.hp.com>
Reported-by: NDan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: NMike Miller <michael.miller@canonical.com>
Signed-off-by: NChristoph Hellwig <hch@lst.de>

They are annoying and do not help anyone.
Signed-off-by: NStephen M. Cameron <scameron@beardog.cce.hp.com>
Reviewed-by: NJustin Lindley <justin.lindley@hp.com>
Reviewed-by: NMike Miller <michael.miller@hp.com>
Signed-off-by: NChristoph Hellwig <hch@lst.de>

It shouldn't happen that we get a check condition with no sense data, but if it
does, we shouldn't just drop the check condition on the floor.
Signed-off-by: NStephen M. Cameron <scameron@beardog.cce.hp.com>
Reviewed-by: NJustin Lindley <justin.lindley@hp.com>
Reviewed-by: NMike Miller <michael.miller@canonical.com>
Signed-off-by: NChristoph Hellwig <hch@lst.de>

Signed-off-by: NStephen M. Cameron <scameron@beardog.cce.hp.com>
Reviewed-by: NJustin Lindley <justin.lindley@hp.com>
Reviewed-by: NMike Miller <michael.miller@canonical.com>
Signed-off-by: NChristoph Hellwig <hch@lst.de>

There's nothing the user can or should do about these messages,
the commands are retried down the normal RAID path, and the
messages just flood the logs and sap performance.
Signed-off-by: NStephen M. Cameron <scameron@beardog.cce.hp.com>
Reviewed-by: NJoe Handzik <joseph.t.handzik@hp.com>
Reviewed-by: NMike Miller <michael.miller@canonical.com>
Signed-off-by: NChristoph Hellwig <hch@lst.de>

Signed-off-by: NStephen M. Cameron <scameron@beardog.cce.hp.com>
Reviewed-by: NJoe Handzik <joseph.t.handzik@hp.com>
Signed-off-by: NChristoph Hellwig <hch@lst.de>

Signed-off-by: NStephen M. Cameron <scameron@beardog.cce.hp.com>
Reviewed-by: NJoe Handzik <joseph.t.handzik@hp.com>
Signed-off-by: NChristoph Hellwig <hch@lst.de>

for controllers which support either of the ioaccel transport methods.
Signed-off-by: NStephen M. Cameron <scameron@beardog.cce.hp.com>
Reviewed-by: NMike Miller <michael.miller@canonical.com>
Reviewed-by: NJoe Handzik <joseph.t.handzik@hp.com>
Signed-off-by: NChristoph Hellwig <hch@lst.de>

Avoid excessive locking by using per-cpu variable for lockup_detected
Signed-off-by: NStephen M. Cameron <scameron@beardog.cce.hp.com>
Reviewed-by: NScott Teel <scott.teel@hp.com>
Signed-off-by: NChristoph Hellwig <hch@lst.de>

Signed-off-by: NStephen M. Cameron <scameron@beardog.cce.hp.com>
Reviewed-by: NMike Miller <michael.miller@canonical.com>
Reviewed-by: NScott Teel <scott.teel@hp.com>
Signed-off-by: NChristoph Hellwig <hch@lst.de>

Now that we can allocate more than 4 reply queues (up to 64)
we shouldn't try to make them share the same allocation but
should allocate them separately.
Signed-off-by: NStephen M. Cameron <scameron@beardog.cce.hp.com>
Reviewed-by: NMike Miller <michael.miller@canonical.com>
Reviewed-by: NScott Teel <scott.teel@hp.com>
Signed-off-by: NChristoph Hellwig <hch@lst.de>

No sense having 8 or 16 reply queues if you only have 4 cpus,
and likewise no sense limiting to 8 reply queues if you have
many more cpus.
Signed-off-by: NStephen M. Cameron <scameron@beardog.cce.hp.com>
Reviewed-by: NMike Miller <michael.miller@canonical.com>
Reviewed-by: NScott Teel <scott.teel@hp.com>
Signed-off-by: NChristoph Hellwig <hch@lst.de>

Signed-off-by: NStephen M. Cameron <scameron@beardog.cce.hp.com>
Reviewed-by: NWebb Scales <webb.scales@hp.com>
Signed-off-by: NChristoph Hellwig <hch@lst.de>

After 3.22 firmware, PMC firmware guys tell us the
previous 5 second delay after a reset now needs to
be 10 secs to avoid a PCIe error due to the driver
looking at the controller too soon after the reset.
Signed-off-by: NJustin Lindley <justin.lindley@hp.com>
Signed-off-by: NStephen M. Cameron <scameron@beardog.cce.hp.com>
Reviewed-by: NStephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: NChristoph Hellwig <hch@lst.de>

Treat the the data direction bits as a bit mask allowing both
READ and WRITE at the same time instead of testing for equality
to see if it's a exclusively a READ or a WRITE.
Signed-off-by: NStephen M. Cameron <scameron@beardog.cce.hp.com>
Reviewed-by: NMike Miller <michael.miller@canonical.com>
Reviewed-by: NWebb Scales <webb.scales@hp.com>
Signed-off-by: NChristoph Hellwig <hch@lst.de>

The fields "major", "max_outstanding", and "usage_count"
of struct ctlr_info were not used for anything.
Signed-off-by: NStephen M. Cameron <scameron@beardog.cce.hp.com>
Reviewed-by: NMike Miller <michael.miller@canonical.com>
Reviewed-by: NWebb Scales <webb.scales@hp.com>
Signed-off-by: NChristoph Hellwig <hch@lst.de>

rescan_hba_mode was defined as a u8 so could never be less than zero:

        rescan_hba_mode = hpsa_hba_mode_enabled(h);
        if (rescan_hba_mode < 0)
                goto out;
Signed-off-by: NJoe Handzik <joseph.t.handzik@hp.com>
Signed-off-by: NStephen M. Cameron <scameron@beardog.cce.hp.com>
Reported-by: NDan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: NChristoph Hellwig <hch@lst.de>

Signed-off-by: NJoe Handzik <joseph.t.handzik@hp.com>
Signed-off-by: NStephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: NChristoph Hellwig <hch@lst.de>

And while we're at it fix a magic number
Signed-off-by: NJoe Handzik <joseph.t.handzik@hp.com>
Signed-off-by: NStephen M. Cameron <scameron@beardog.cce.hp.com>
Signed-off-by: NChristoph Hellwig <hch@lst.de>