Added module parameter "poll_mode_io" to support for "polling"
(reduced interrupt operation).  In this mode, IO completion interrupts
are delayed. At the end of initiating IOs, the driver schedules for
cmd completion if there are pending cmds.  A timer-based interrupt has
also been added to prevent IO completion from being delayed
indefinitely in the case that no new IOs are initiated.  Some
formatting issues in resume, suspend comment block also corrected
Signed-off-by: NBo Yang <bo.yang@lsi.com>
Signed-off-by: NJames Bottomley <James.Bottomley@HansenPartnership.com>

Driver will call cmd completion routine from Reset path without waiting for cmd completion from isr context.
Signed-off-by: NBo Yang <bo.yang@lsi.com>
Signed-off-by: NJames Bottomley <James.Bottomley@HansenPartnership.com>

MegaRAID utilities expect sense_buff to be of type unsigned long.
Signed-off-by: NBo Yang <bo.yang@lsi.com>
Signed-off-by: NJames Bottomley <James.Bottomley@HansenPartnership.com>

1. Setting the max_sectors_per_req based on max SGL supported by the
   FW. Prior versions calculated this value from controller info's
   max_sectors_1, max_sectors_2. For certain controllers/FW, this was
   resulting in a value greater than max SGL supported by the FW. Now
   we take the min of max sgl from FW and max_sectors calculation.

2. Increased MFI_POLL_TIMEOUT_SECS to 60 seconds from 10. FW may take
   a max of 60 seconds to respond to the INIT cmd.
Signed-off-by: NBo Yang <bo.yang@lsi.com>
Signed-off-by: NJames Bottomley <James.Bottomley@HansenPartnership.com>

Adding hibernation support. suspend, resume routine implemented.
Signed-off-by: NBo Yang <bo.yang@lsi.com>
Signed-off-by: NJames Bottomley <James.Bottomley@HansenPartnership.com>

The 3ware 9500S-8 SATA RAID controller exhibits terrible write
performance when PCI memory-write-and-invalidate is disabled.  This is
easy to demonstrate by replacing pci_try_set_mwi() in the patch below
with pci_clear_mwi().  My benchmarks show the following:

MWI disabled: 15 MB/s write, 330 MB/s read
MWI enabled:  240 MB/s write, 330 MB/s read

Most motherboards will enable MWI without the driver having to set it
explicitly, so most people probably wouldn't encounter this problem.
For the few motherboards that don't enable it, this patch could give a
16x performance improvement for writing.

This issue does not seem to affect the 9550SX controller, but the patch
doesn't hurt it either.  I haven't tested any of the other 3ware
controllers.
Signed-off-by: NTony Battersby <tonyb@cybernetics.com>
Acked-by: Nadam radford <aradford@gmail.com>
Signed-off-by: NJames Bottomley <James.Bottomley@HansenPartnership.com>

Annotate sas_queuecommand with locking details, and clean up a few
more sparse warnings about static/non-static declarations.
Signed-off-by: NDarrick J. Wong <djwong@us.ibm.com>
Signed-off-by: NJames Bottomley <James.Bottomley@HansenPartnership.com>

sparse complains about the mixing of enums in libsas.  Since the
underlying numeric values of both enums are the same, combine them
to get rid of the warning.
Signed-off-by: NDarrick J. Wong <djwong@us.ibm.com>
Signed-off-by: NJames Bottomley <James.Bottomley@HansenPartnership.com>

Signed-off-by: NMatthias Kaehlcke <matthias.kaehlcke@gmail.com>
Acked-by: NBo Yang <Bo.Yang@lsi.com>
Signed-off-by: NJames Bottomley <James.Bottomley@HansenPartnership.com>

 - convert to accessors and !use_sg cleanup
 - Not ready for sg-chaining
Signed-off-by: NBoaz Harrosh <bharrosh@panasas.com>
Acked-by: NRandy Dunlap <randy.dunlap@oracle.com>
Tested-by: NRandy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: NJames Bottomley <James.Bottomley@HansenPartnership.com>

 - convert to accessors and !use_sg cleanup
Signed-off-by: NBoaz Harrosh <bharrosh@panasas.com>
Acked-by: NRandy Dunlap <randy.dunlap@oracle.com>
Tested-by: NRandy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: NJames Bottomley <James.Bottomley@HansenPartnership.com>

Signed-off-by: NJames Bottomley <James.Bottomley@HansenPartnership.com>

Add Documentation/DocBook/scsi_midlayer.tmpl, add to Makefile, and update
lots of kerneldoc comments in drivers/scsi/*.

Updated with comments from Stefan Richter, Stephen M. Cameron,
 James Bottomley and Randy Dunlap.
Signed-off-by: NRob Landley <rob@landley.net>
Signed-off-by: NJames Bottomley <James.Bottomley@HansenPartnership.com>

Remove tracing for request with a "qualifier" field set in the
response.  The protocol status qualifier now contains measurement
data for "good" commands, so this check would trace every response
by default.

The fix is to simply remove the "qual" tracing: The responses with an
interesting status are also traced as "ferr" or "perr" and all
responses can be traced as "norm" with a higher trace level.
Signed-off-by: NChristof Schmitt <christof.schmitt@de.ibm.com>
Signed-off-by: NSwen Schillig <swen@vnet.ibm.com>
Signed-off-by: NJames Bottomley <James.Bottomley@HansenPartnership.com>

When adding an invalid LUN, there is a deadlock between the add
via scsi_scan_target and the slave_destroy handler: The handler
waits for the scan to complete, but for an invalid unit,
scsi_scan_target directly calls the slave_destroy handler.

Fix the deadlock by removing the wait in the slave_destroy
handler, it was not necessary anyway.
Signed-off-by: NChristof Schmitt <christof.schmitt@de.ibm.com>
Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: NSwen Schillig <swen@vnet.ibm.com>
Signed-off-by: NJames Bottomley <James.Bottomley@HansenPartnership.com>

The common I/O layer can call remove a handler to inform zfcp
that a device disappeared. The handler zfcp_ccw_remove then
removes all unit, port and the adapter data structures. Removing
the units requires that the SCSI devices are removed first.
Signed-off-by: NChristof Schmitt <christof.schmitt@de.ibm.com>
Signed-off-by: NSwen Schillig <swen@vnet.ibm.com>
Signed-off-by: NJames Bottomley <James.Bottomley@HansenPartnership.com>

It is not necessary to use jiffies or milliseconds to specify
waiting times that last a couple of seconds.
Signed-off-by: NChristof Schmitt <christof.schmitt@de.ibm.com>
Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: NSwen Schillig <swen@vnet.ibm.com>
Signed-off-by: NJames Bottomley <James.Bottomley@HansenPartnership.com>

Signed-off-by: NChristof Schmitt <christof.schmitt@de.ibm.com>
Signed-off-by: NSwen Schillig <swen@vnet.ibm.com>
Signed-off-by: NJames Bottomley <James.Bottomley@HansenPartnership.com>

The callback function used by zfcp always returns success,
which is an indication for the SCSI midlayer to stop error
handling. Remove the bus_reset callback, since the same
function will be called via the host_reset callback.
Signed-off-by: NChristof Schmitt <christof.schmitt@de.ibm.com>
Signed-off-by: NSwen Schillig <swen@vnet.ibm.com>
Signed-off-by: NJames Bottomley <James.Bottomley@HansenPartnership.com>

Some of our vendors have requested that our adapters ignore the hardware
reset attempts during recovery and have enforced this with changes in
Adapter Firmware. Some of our customers have requested the option to be
able to reset the adapter under adverse adapter failure, we even had a
few defects reported here considering it a regression that the Adapter
could not be reset. This patch addresses this dichotomy. The user can
force the adapter to be reset if it supports the IOP_RESET_ALWAYS
command, in cases where the adapter has been programmed to ignore the
reset, by setting the aacraid.check_reset parameter to a value of -1.

The driver will not reset an Adapter that does not support the reset
command(s).

This patch also fixes and cleans up some of the logic associated with
resetting the adapter.
Signed-off-by: NMark Salyzyn <aacraid@adaptec.com>
Signed-off-by: NJames <James.Bottomley@HansenPartnership.com>
Signed-off-by: NJames Bottomley <James.Bottomley@HansenPartnership.com>

  - This patch depends on:
      NCR5380: Use scsi_eh API for REQUEST_SENSE invocation
  - convert to accessors and !use_sg cleanup
  - FIXME: Not sg-chain ready look for ++cmd->SCp.buffer
Signed-off-by: NBoaz Harrosh <bharrosh@panasas.com>
Signed-off-by: NJames <James.Bottomley@HansenPartnership.com>
Signed-off-by: NJames Bottomley <James.Bottomley@HansenPartnership.com>

  - code used to set sg_tablesize to zero for board revision
    less than 6. This is no longer supported, therefore I
    use sg_tablesize=1 and open code the sg handling for that case.
  - Get rid of use of SG_NONE which will be removed soon.
Signed-off-by: NBoaz Harrosh <bharrosh@panasas.com>
Signed-off-by: NJames <James.Bottomley@HansenPartnership.com>
Signed-off-by: NJames Bottomley <James.Bottomley@HansenPartnership.com>

 - convert to accessors and !use_sg cleanup
 - Probably not ready for sg-chaining
Signed-off-by: NBoaz Harrosh <bharrosh@panasas.com>
Acked-by: NChristoph Hellwig <hch@infradead.org>
Cc: jameshsu <jameshsu@acard.com>
Signed-off-by: NJames Bottomley <James.Bottomley@HansenPartnership.com>

  - remove the unnecessary map_single path.
  - convert to use the new accessors for the sg lists and the
    parameters.
Signed-off-by: NBoaz Harrosh <bharrosh@panasas.com>
Acked-by: NDouglas Gilbert <dougg@torque.net>
Signed-off-by: NJames Bottomley <James.Bottomley@HansenPartnership.com>

  - This patch should be commited before:
    usb: transport - convert to accessors and !use_sg code path removal

  - isd200_action() was still using direct liniar pointers in issuing
    commands to the USB transport level. This is no longer supported,
    use one-element scatterlist instead.
  - Adjustment of command's length in the case of scsi-to-ata translation
    is now restored before return to queuecommand, since other wise it can
    leak BIOs.
  - isd200_action() return Error on unknown requests. Used to print an error
    but still try to send garbage cdb.
  - convert few places to scsi data accessors.
  - Todo: This file will need to be changed when scsi_cmnd changes to
    scsi_data_buffer or any other solution.
Signed-off-by: NBoaz Harrosh <bharrosh@panasas.com>
Acked-by: NMatthew Dharm <mdharm-scsi@one-eyed-alien.net>
Signed-off-by: NJames Bottomley <James.Bottomley@HansenPartnership.com>

  - This patch depends on:
    usb: transport.c use scsi_eh API in REQUEST_SENSE execution

  - Use scsi data accessors and remove of !use_sg code path.
  - New usb_stor_bulk_srb() for use by drivers

[jejb: updated with corrective fix.

had a bug in residual handling in the new usb_stor_bulk_srb()
function.  Found by Gabriel C. in -mm tree.
Tested-by: NGabriel C <nix.or.die@googlemail.com>
]
Signed-off-by: NBoaz Harrosh <bharrosh@panasas.com>
Acked-by: NMatthew Dharm <mdharm-scsi@one-eyed-alien.net>
Signed-off-by: NJames Bottomley <James.Bottomley@HansenPartnership.com>

 - functions that received char* but where passed scatterlist* mostly
   were changed to receive void*
 - Use scsi data accessors and remove of !use_sg code path
Signed-off-by: NBoaz Harrosh <bharrosh@panasas.com>
Acked-by: NMatthew Dharm <mdharm-scsi@one-eyed-alien.net>
Signed-off-by: NJames Bottomley <James.Bottomley@HansenPartnership.com>

 - Use scsi data accessors and remove of !use_sg code path
 - This patch is dependent on cleanup patch to usb transport.c/h
Signed-off-by: NBoaz Harrosh <bharrosh@panasas.com>
Acked-by: NMatthew Dharm <mdharm-scsi@one-eyed-alien.net>
Signed-off-by: NJames Bottomley <James.Bottomley@HansenPartnership.com>

 - Use scsi data accessors and remove of !use_sg code path
Signed-off-by: NBoaz Harrosh <bharrosh@panasas.com>
Acked-by: NMatthew Dharm <mdharm-scsi@one-eyed-alien.net>
Signed-off-by: NJames Bottomley <James.Bottomley@HansenPartnership.com>

  - Apparently no one wonts this driver, and no one
    is willing to fix it for future changes to SCSI.
    So remove it, and if someone wants it in the future
    He can revive it with the needed fixes.
Signed-off-by: NBoaz Harrosh <bharrosh@panasas.com>
Signed-off-by: NJames Bottomley <James.Bottomley@HansenPartnership.com>

The psi240i driver is still written for cmnd->request_buffer
as a char pointer to actual data. There was never any attempt
to use the scatterlist option.

  - remove all source files (3) from drivers/scsi
  - Remove from Makefile and Kconfig
Signed-off-by: NBoaz Harrosh <bharrosh@panasas.com>
Signed-off-by: NJames Bottomley <James.Bottomley@HansenPartnership.com>

 - convert to accessors and !use_sg cleanup
Signed-off-by: NBoaz Harrosh <bharrosh@panasas.com>
Signed-off-by: NJames Bottomley <James.Bottomley@HansenPartnership.com>

 - convert to accessors and !use_sg cleanup
Signed-off-by: NBoaz Harrosh <bharrosh@panasas.com>
Signed-off-by: NJames Bottomley <James.Bottomley@HansenPartnership.com>

 - convert to accessors and !use_sg cleanup
Signed-off-by: NBoaz Harrosh <bharrosh@panasas.com>
Signed-off-by: NJames Bottomley <James.Bottomley@HansenPartnership.com>

 - convert to accessors and !use_sg cleanup
 - Not ready for sg-chaining
Signed-off-by: NBoaz Harrosh <bharrosh@panasas.com>
Signed-off-by: NJames Bottomley <James.Bottomley@HansenPartnership.com>

 - convert to accessors and !use_sg cleanup
Signed-off-by: NBoaz Harrosh <bharrosh@panasas.com>
Signed-off-by: NJames Bottomley <James.Bottomley@HansenPartnership.com>

 - convert to accessors and !use_sg cleanup
Signed-off-by: NBoaz Harrosh <bharrosh@panasas.com>
Signed-off-by: NJames Bottomley <James.Bottomley@HansenPartnership.com>

 - convert to accessors and !use_sg cleanup
Signed-off-by: NBoaz Harrosh <bharrosh@panasas.com>
Signed-off-by: NJames Bottomley <James.Bottomley@HansenPartnership.com>

 - convert to accessors and !use_sg cleanup
Signed-off-by: NBoaz Harrosh <bharrosh@panasas.com>
Signed-off-by: NJames Bottomley <James.Bottomley@HansenPartnership.com>

  - use scsi data accessors
  - cleanup !use_sg code paths
  - TODO: use next_sg() for Jens's sglist branch. Look for 2
    places with "SCp.buffer++"
Signed-off-by: NBoaz Harrosh <bharrosh@panasas.com>
Signed-off-by: NJames Bottomley <James.Bottomley@HansenPartnership.com>