Added command line option and shost sysfs attribute called
mpt2sas_fwfault_debug. When enduser writes a "1" to this parameter, this
will enable support in the driver for debugging firmware timeout related
issues.  This handling was added in three areas (a) scsi error handling
callback called task_abort, (b) IOCTL interface, and (c) other timeouts that
result in diag resets, such as manufacturing config pages.  When this
support is enabled, the driver will provide dump_stack to console, halt
controller firmware, and panic driver. The end user probably would want to
setup serial console redirection so the dump stack can be seen.

Here are the three methods for enable this support:

(a) # insmod mpt2sas.ko mpt2sas_fwfault_debug=1
(b) # echo 1 > /sys/module/mpt2sas/parameters/mpt2sas_fwfault_debug
(c) # echo 1 > /sys/class/scsi_host/host#/fwfault_debug  (where # is
the host number)
Signed-off-by: NKashyap Desai <kashyap.desai@lsi.com>
Signed-off-by: NEric Moore <Eric.moore@lsi.com>
Signed-off-by: NJames Bottomley <James.Bottomley@suse.de>

Following a diag_reset, a request to send an ioc_init is timing out.  The
timeout occurred within the HANDSHAKE logic while waiting on firmware to
acknowledge that the driver had wrote to the doorbell register.  This was
root caused to a logic timeout in the firmware code.  The proposed solution
is for the driver to call the udelay instead of msleep API in function where
its looping reading the interrupt status.  In addition to this change, there
were two additional cases where we deleted the clearing interrupt status
outside handshake context.
Signed-off-by: NKashyap Desai <kashyap.desai@lsi.com>
Signed-off-by: NJames Bottomley <James.Bottomley@suse.de>

Now driver call init_completion on a per request basis.  At some
point the wait_for_completion_timeout is not waiting for the timeout,
instead returning immediately, thus going into diag reset.  This fix will
address all request using the wait_for_completion_timeout API. The previous
implimentation was only calling init_completion at driver
load time.
Signed-off-by: NKashyap Desai <kashyap.desai@lsi.com>
Signed-off-by: NJames Bottomley <James.Bottomley@suse.de>

(1) Added three new functions to handle sending target resest and OP_REMOVE
from interrupt time, they are _scsih_tm_tr_send, _scsih_tm_tr_complete, and
_scsih_sas_control_complete.  This code will create a link list of pending
target resets if there is no more available request in the hipriority
request queue.  The list is stored in ioc->delayed_tr_list.

(2) All callback handler return type is changed from void to u8.
Now _base_interrupt will check for return type of callback handlers to
take decision of message frame is already freed or not.
In genral,
Return 1 meaning mf should be freed from _base_interrupt
       0 means the mf is freed from function.
Signed-off-by: NKashyap Desai <kashyap.desai@lsi.com>
Signed-off-by: NJames Bottomley <James.Bottomley@suse.de>

1) create a pool of high priority message frames in the region of memory
between message frames and chains.  The modifications are in
_base_allocate_memory_pools.  Also create a seperate pool of memory for
internal commands located near the same region of memory.  The pool of high
priority message frames is restriced by the facts->HighPriorityCredit.

2) Create additional API for accessing request message frames. New function
mpt2sas_base_get_smid_hpr is for highpriority request. New function
mpt2sas_base_get_smid_scsiio for SCSI_IO, passing in the scsi command
pointer.  The mpt2sas_base_get_smid function is for requesting internal
commands.

3) Added new function _base_get_cb_idx to obtain the callback
index from one of the three pools of request message frames.

4) Removed wrapper functions _scsih_scsi_lookup_set and
_scsih_scsi_lookup_getclear. These were removed because this handling was
moved into mpt2sas_base_get_smid_scsiio and mpt2sas_base_free_smid.

5) The function mpt2sas_base_free_smid is modified so the request message
frames are put back on one of the three pools of request message frames.
Signed-off-by: NKashyap Desai <kashyap.desai@lsi.com>
Signed-off-by: NJames Bottomley <James.Bottomley@suse.de>

Update the copyright year to 2009 through out the code.
Signed-off-by: NKashyap Desai <kashyap.desai@lsi.com>
Signed-off-by: NJames Bottomley <James.Bottomley@suse.de>

Drivers header are updated to the MPI2 REV K headers.
Renamed VF_ID to msix_index in all call back handlers.
VF_ID is removed from all request descriptor.
Signed-off-by: NKashyap Desai <kashyap.desai@lsi.com>
Signed-off-by: NJames Bottomley <James.Bottomley@suse.de>

Cleaned up base_interrupt routine to be more effiecent.

Deleted about a third of the config page API by moving redundant code from all
the calling functions to _config_request.
Signed-off-by: NKashyap Desai <kashyap.desai@lsi.com>
Reviewed-by: NEric Moore <Eric.moore@lsi.com>
Signed-off-by: NJames Bottomley <James.Bottomley@suse.de>

This patch modifies the slave_configure callback so the messages that get sent
to system log for RAID1E volumes contain the string "RAID10" instead of
"RAID1E". These messages contain information regarding what kind of scsi device
is being added. Certain OEMS can enable displaying the RAID10 string instead of
RAID1E via manufacturing page 10.   The driver will read this config page at
driver load time, then determine from the GenericFlags0 bits whether display
the RAID10 or RAID1E string, also even drive count is taken into consideration.
Signed-off-by: NKashyap Desai <kashyap.desai@lsi.com>
Reviewed-by: NEric Moore <Eric.moore@lsi.com>
Cc: Stable Tree <stable@kernel.org>
Signed-off-by: NJames Bottomley <James.Bottomley@suse.de>

This patch renames the flag for indicating host reset from
ioc_reset_in_progress to shost_recovery. It also removes the spin locks
surrounding the setting of this flag, which are unnecessary.   Sanity checks on
the shost_recovery flag were added thru out the code so as to prevent sending
firmware commands during host reset.  Also, the setting of the shost state to
SHOST_RECOVERY was removed to prevent deadlocks, this is actually better
handled by the shost_recovery flag.
Signed-off-by: NKashyap Desai <kashyap.desai@lsi.com>
Reviewed-by: NEric Moore <Eric.moore@lsi.com>
Cc: Stable Tree <stable@kernel.org>
Signed-off-by: NJames Bottomley <James.Bottomley@suse.de>

Following host reset its possible that the controller firmware could
assign new handles for devices, as well as adding or deleting devices. There is
code in the driver that will rescan the topology folowing host reset; updating
device handles, and remove devices that are no longer responding. This patch
will improve the responsivness by moving this rescaning from the delayed hotplug
worker thread to immediately following the host reset.
Signed-off-by: NKashyap Desai <kashyap.desai@lsi.com>
Reviewed-by: NEric Moore <Eric.moore@lsi.com>
Cc: Stable Tree <stable@kernel.org>
Signed-off-by: NJames Bottomley <James.Bottomley@suse.de>

Fix another ocurring when the system resumes.  This oops was due to driver
setting the pci drvdata to NULL on the prior hibernation.  Becuase it was
set to NULL, upon resmume we assume the pci drvdata is non-zero, and we oops.
To fix the ooops, we don't set pci drvdata to NULL at hibernation time.
Signed-off-by: NKashyap Desai <kashyap.desai@lsi.com>
Signed-off-by: NJames Bottomley <James.Bottomley@suse.de>

Fix oops ocurring at hibernation time.  This oops was due to the firmware fault
watchdog timer still running after we freed resources. To fix the issue we need
to terminate the watchdog timer at hibernation time.
Signed-off-by: NKashyap Desai <kashyap.desai@lsi.com>
Signed-off-by: NJames Bottomley <James.Bottomley@suse.de>

Inhibit 0x3117 loginfos - during cable pull, there are too many printks going
to the syslog, this is have impact on how fast the interrupt routine can handle
keeping up with command completions; this was the root cause to the config
pages timeouts.
Signed-off-by: NKashyap Desai <kashyap.desai@lsi.com>
Signed-off-by: NJames Bottomley <James.Bottomley@suse.de>

The Dell branding along with the VID, DID, SSVID, SSDID following the LSI
branding that contains the card firmware/chip/bios versions.  If the SSDID
is not known but it is a Dell HBA, the driver will print the SSDID instead
of the Dell branding string.  Nothing will be printed for non Dell HBAs
Signed-off-by: NEric Moore <eric.moore@lsi.com>
Signed-off-by: NJames Bottomley <James.Bottomley@HansenPartnership.com>

The poison sanity check on the reply_post_free register needs to be by 32bit,
not 64bit. The poison check is there because its possible that the driver read
the 1st 32bit before the 2nd 32bit has been written to by firmware.  In other
words, this handles race between driver reading the 64 bit register, and it
being dma'd across pci memory from controller firmware as two 32bit pci writes.
Signed-off-by: NEric Moore <eric.moore@lsi.com>
Signed-off-by: NJames Bottomley <James.Bottomley@HansenPartnership.com>

This is the second go through of the old DMA_nBIT_MASK macro,and there're not
so many of them left,so I put them into one patch.I hope this is the last round.
After this the definition of the old DMA_nBIT_MASK macro could be removed.
Signed-off-by: NYang Hongyang <yanghy@cn.fujitsu.com>
Cc: Russell King <rmk@arm.linux.org.uk>
Cc: Tony Lindgren <tony@atomide.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: James Bottomley <James.Bottomley@HansenPartnership.com>
Cc: Greg KH <greg@kroah.com>
Cc: Takashi Iwai <tiwai@suse.de>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

* This is new scsi lld device driver from LSI supporting the SAS 2.0
  standard. I have split patchs by filename.

* Here is list of new 6gb host controllers:

  LSI SAS2004
  LSI SAS2008
  LSI SAS2108
  LSI SAS2116

* Here are the changes in the 4th posting of this patch set:

(1) fix compile errors when SCSI_MPT2SAS_LOGGING is not enabled
(2) add mpt2sas to the SCSI Mid Layer Makefile
(3) append mpt2sas_ to the naming of all non-static functions
(4) fix oops for SMP_PASSTHRU
(5) doorbell algorithm imported changes from windows driver

* Here are the changes in the 3rd posting of this patch set:

(1) add readl following writel from the function that disables interrupts
(2) replace 0xFFFFFFFFFFFFFFFFULL with ~0ULL
(3) when calling pci_enable_msix, only pass one msix entry (instead of 15).
(4) remove the "current HW implementation uses..... " comment in the sources
(5) merged bug fix for SIGIO/POLLIN notifcation; reported by the storlib team.

* Here are the changes in the 2nd posting of this patch set:

(1) use little endian types in the mpi headers
(2) merged in bug fix's from inhouse drivers.
Signed-off-by: NEric Moore <eric.moore@lsi.com>
Tested-by: Npeter Bogdanovic <pbog@us.ibm.com>
Signed-off-by: NJames Bottomley <James.Bottomley@HansenPartnership.com>