- LUN goes offline if there are at least two scsi command timeouts
  Completing the IO with scsi_done() fixes the issue.
Signed-off-by: NNarsimhulu Musini <nmusini@cisco.com>
Signed-off-by: NSesidhar Baddela <sebaddel@cisco.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

Adding additional stats, and fixed logging messages.
- Added qdepth change stats
- Added separate isr stats for each type of interrupt
- Fixed race in updating active IOs
- Suppressed Link event message for DAS backend.
Signed-off-by: NNarsimhulu Musini <nmusini@cisco.com>
Signed-off-by: NSesidhar Baddela <sebaddel@cisco.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

Signed-off-by: NDick Kennedy <dick.kennedy@avagotech.com>
Signed-off-by: NJames Smart <james.smart@avagotech.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

Signed-off-by: NDick Kennedy <dick.kennedy@avagotech.com>
Signed-off-by: NJames Smart <james.smart@avagotech.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

Signed-off-by: NDick Kennedy <dick.kennedy@avagotech.com>
Signed-off-by: NJames Smart <james.smart@avagotech.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

Revise versions to reflect SmartSAN 2.0 support

RDP updated to support additional descriptors:
  Credit descriptor
  Optical Element Data descriptors for Temperature, Voltage,
        Bias current, TX power and TX power.
  Optical Product Data descriptor.
Signed-off-by: NDick Kennedy <dick.kennedy@avagotech.com>
Signed-off-by: NJames Smart <james.smart@avagotech.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

When the switch is rebooted, the lpfc driver fails to log
into the fabric, and Unexpected timeout message is seen.

Fix: Do not issue RegVFI if the FLOGI was internally aborted.
Signed-off-by: NDick Kennedy <dick.kennedy@avagotech.com>
Signed-off-by: NJames Smart <james.smart@avagotech.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

Pass cmd iu payloads inline to adapter job structure rather than as
separate dma buffers.
Signed-off-by: NDick Kennedy <dick.kennedy@avagotech.com>
Signed-off-by: NJames Smart <james.smart@avagotech.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

The default rpi completion handler does back to back puts to force the
removal of the ndlp. This ends up calling lpfc_unreg_rpi after the
reference count is at 0.

Fix:  Check the reference count of the ndlp before getting the ref to
make sure we are not getting a reference on a removed object.
Signed-off-by: NDick Kennedy <dick.kennedy@avagotech.com>
Signed-off-by: NJames Smart <james.smart@avagotech.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

Driver didn't program the REG_VFI mailbox correctly, giving the adapter
bad addresses.
Signed-off-by: NDick Kennedy <dick.kennedy@avagotech.com>
Signed-off-by: NJames Smart <james.smart@avagotech.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

After a link bounce, when a remote port issues a LOGO while a REGLOGIN
is pending on that port, the driver does not clean up the ndlp
structure. May result in stack traces in the console log.

Fix: Clear the NLP_REG_LOGIN_SEND flag on the ndlp in the routine
Signed-off-by: NDick Kennedy <dick.kennedy@avagotech.com>
Signed-off-by: NJames Smart <james.smart@avagotech.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

Avoid that building with W=1 causes gcc to report warnings about symbols
that have not been declared.
Signed-off-by: NBart Van Assche <bart.vanassche@sandisk.com>
Reviewed-by: NMike Christie <michaelc@cs.wisc.edu>
Reviewed-by: NJohannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

The output of "git grep -nHw iscsi_is_flashnode_conn_dev" shows that
this function is only called from inside source file
drivers/scsi/scsi_transport_iscsi.c. Hence unexport this function.
Signed-off-by: NBart Van Assche <bart.vanassche@sandisk.com>
Reviewed-by: NMike Christie <michaelc@cs.wisc.edu>
Reviewed-by: NJohannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

Avoid that building with W=1 causes gcc to report warnings about
set-but-not-used variables.
Signed-off-by: NBart Van Assche <bart.vanassche@sandisk.com>
Reviewed-by: NMike Christie <michaelc@cs.wisc.edu>
Reviewed-by: NJohannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

Avoid that building with W=1 causes gcc to report warnings about
set-but-not-used variables.
Signed-off-by: NBart Van Assche <bart.vanassche@sandisk.com>
Reviewed-by: NMike Christie <michaelc@cs.wisc.edu>
Reviewed-by: NJohannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

Running "git grep -nHw iscsi_eh_target_reset" shows that this function
is only called from inside the drivers/scsi/libiscsi.c source
file. Hence unexport this function.
Signed-off-by: NBart Van Assche <bart.vanassche@sandisk.com>
Reviewed-by: NMike Christie <michaelc@cs.wisc.edu>
Reviewed-by: NJohannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

In the Linux kernel it is preferred to return a meaningful error code
instead of -1. This patch does not change the behavior of the caller of
qla82xx_pinit_from_rom().
Signed-off-by: NBart Van Assche <bart.vanassche@sandisk.com>
Cc: Quinn Tran <quinn.tran@qlogic.com>
Cc: Himanshu Madhani <himanshu.madhani@qlogic.com>
Cc: Christoph Hellwig <hch@lst.de>
Reviewed-by: NJohannes Thumshirn <jthumshirn@suse.de>
Acked-by: NQuinn Tran <quinn.tran@qlogic.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

Running the command "git grep -nHw scsi_is_fc_vport" shows that this
function is only called from inside scsi_transport_fc.c. Hence unexport
this function.
Signed-off-by: NBart Van Assche <bart.vanassche@sandisk.com>
Cc: Hannes Reinecke <hare@suse.de>
Cc: James Smart <james.smart@avagotech.com>
Reviewed-by: NHannes Reinicke <hare@suse.de>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

When issuing I/O we check if rport is online through libfc
rport_lookup() function which needs to be protected by mutex lock that
cannot acquired in I/O context. The change is to use midlayer remote
port s dd_data which is preserved until its devloss timeout and no
protection is required.  The the scsi_cmnd error code is expected to be
in the left 16 bits of the result field. Changed to correct this.  Fnic
driver version changed from 1.6.0.20 to 1.6.0.21
Signed-off-by: NSatish Kharat <satishkh@cisco.com>
Signed-off-by: NSesidhar Baddela <sebaddel@cisco.com>
Reviewed-by: NEwan Milne <emilne@redhat.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

In case of LUN reset, the device reset command is issued with one of the
I/Os that has timed out on that LUN. The change is to also return this
I/O with error status set to DID_RESET. In case when the reset is issued
using the sg_reset tool (from sg3_utils) it is a new command and new_sc
is set to 1.  Fnic driver version changed from 1.6.0.19 to 1.6.0.20

[mkp: Fixed checkpatch warning]
Signed-off-by: NSatish Kharat <satishkh@cisco.com>
Signed-off-by: NSesidhar Baddela <sebaddel@cisco.com>
Reviewed-by: NEwan Milne <emilne@redhat.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

If an I/O times out and an abort issued by host, if the abort is
successful we need to set scsi status as DID_ABORT. Or else the
mid-layer error handler which looks for this error code, will offline
the device. Also if the original I/O is not found in fnic firmware, we
will consider the abort as successful.  The start_time assignment is
moved because of the new goto.  Fnic driver version changed from
1.6.0.17a to 1.6.0.19, version 1.6.0.18 has been skipped

[mkp: Fixed checkpatch warning]
Signed-off-by: NSatish Kharat <satishkh@cisco.com>
Signed-off-by: NSesidhar Baddela <sebaddel@cisco.com>
Reviewed-by: NEwan D. Milne <emilne@redhat.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

Add new trace functions for ZBC_IN and ZBC_OUT.
Reviewed-by: NDoug Gilbert <dgilbert@interlog.com>
Reviewed-by: NEwan D. Milne <emilne@redhat.com>
Signed-off-by: NHannes Reinecke <hare@suse.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

Reviewed-by: NEwan D. Milne <emilne@redhat.com>
Signed-off-by: NHannes Reinecke <hare@suse.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

scsi_opcode_name() is displaying the opcode, not the service
action.
Reviewed-by: NEwan D. Milne <emilne@redhat.com>
Signed-off-by: NHannes Reinecke <hare@suse.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

On larger installations it is useful to disable automatic LUN scanning,
and only add the required LUNs via udev rules.  This can speed up bootup
dramatically.

This patch introduces a new scan module parameter value 'manual', which
works like 'none', but can be overridden by setting the 'rescan' value
from scsi_scan_target to 'SCSI_SCAN_MANUAL'.  And it updates all
relevant callers to set the 'rescan' value to 'SCSI_SCAN_MANUAL' if
invoked via the 'scan' option in sysfs.
Signed-off-by: NHannes Reinecke <hare@suse.de>
Reviewed-by: NEwan D. Milne <emilne@redhat.com>
Tested-by: NLaurence Oberman <loberman@redhat.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

I'm told that some targets are liable to disconnect a REQUEST SENSE
command. Theoretically this would cause a command undergoing autosense to
be moved onto the disconnected list. The bus reset handler must call
complete_cmd() for these commands, otherwise the hostdata->sensing pointer
will not get cleared. That would cause autosense processing to stall and
a timeout or an incorrect scsi_eh_restore_cmnd() would eventually follow.
Signed-off-by: NFinn Thain <fthain@telegraphics.com.au>
Reported-by: NMichael Schmitz <schmitzmic@gmail.com>
Tested-by: NOndrej Zary <linux@rainbow-software.org>
Reviewed-by: NHannes Reinecke <hare@suse.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

Fix various issues: Comments about bus errors are incorrect. The
PDMA asm must return the size of the memory access that faulted so the
transfer count can be adjusted accordingly. A phase change may cause a
bus error but should not be treated as failure. A bus error does not
always imply a phase change and generally the transfer may continue.
Scatter/gather doesn't seem to work with PDMA due to overruns. This is
a pity because peak throughput seems to double with SG_ALL.
Tested on a Mac LC III and a PowerBook 520.
Signed-off-by: NFinn Thain <fthain@telegraphics.com.au>
Reviewed-by: NHannes Reinecke <hare@suse.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

The benefit of limiting can_queue to 1 is that atari_scsi shares the
ST DMA chip more fairly with other drivers (e.g. falcon-ide).

Unfortunately, this can limit SCSI bus utilization. On systems without
IDE, atari_scsi should issue SCSI commands whenever it can arbitrate for
the bus. Make that possible by making can_queue configurable.
Signed-off-by: NFinn Thain <fthain@telegraphics.com.au>
Reviewed-by: NHannes Reinecke <hare@suse.com>
Tested-by: NMichael Schmitz <schmitzmic@gmail.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

This setting does not need to be conditional on Atari ST or TT.
Signed-off-by: NFinn Thain <fthain@telegraphics.com.au>
Tested-by: NMichael Schmitz <schmitzmic@gmail.com>
Reviewed-by: NHannes Reinecke <hare@suse.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

Update kernel parameter documentation for atari_scsi, mac_scsi and
g_NCR5380 drivers. Remove duplication.
Signed-off-by: NFinn Thain <fthain@telegraphics.com.au>
Reviewed-by: NHannes Reinecke <hare@suse.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

Signed-off-by: NFinn Thain <fthain@telegraphics.com.au>
Reviewed-by: NHannes Reinecke <hare@suse.com>
Tested-by: NMichael Schmitz <schmitzmic@gmail.com>
Tested-by: NOndrej Zary <linux@rainbow-software.org>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

Signed-off-by: NFinn Thain <fthain@telegraphics.com.au>
Reviewed-by: NHannes Reinecke <hare@suse.com>
Tested-by: NMichael Schmitz <schmitzmic@gmail.com>
Tested-by: NOndrej Zary <linux@rainbow-software.org>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

Decode all bits in the chip registers. They are all useful at times.
Fix printk severity so that this output can be suppressed along with
the other debugging output.
Signed-off-by: NFinn Thain <fthain@telegraphics.com.au>
Reviewed-by: NHannes Reinecke <hare@suse.com>
Tested-by: NMichael Schmitz <schmitzmic@gmail.com>
Tested-by: NOndrej Zary <linux@rainbow-software.org>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

The dmx3191d driver is not capable of DMA or PDMA so all transfers
use PIO. Now that large slow PIO transfers periodically stop and call
cond_resched(), the max_sectors limit can go away.
Signed-off-by: NFinn Thain <fthain@telegraphics.com.au>
Reviewed-by: NHannes Reinecke <hare@suse.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

The driver has a limit of eight LUs because of the byte-sized bitfield
that is used for busy flags. That means the maximum LUN is 7. The default
is 8.
Signed-off-by: NFinn Thain <fthain@telegraphics.com.au>
Tested-by: NMichael Schmitz <schmitzmic@gmail.com>
Tested-by: NOndrej Zary <linux@rainbow-software.org>
Reviewed-by: NHannes Reinecke <hare@suse.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

Now that atari_scsi and sun3_scsi have been converted to use the NCR5380.c
core driver, remove atari_NCR5380.c. Also remove the last vestiges of its
Tagged Command Queueing implementation from the wrapper drivers.

The TCQ support in atari_NCR5380.c is abandoned by this patch. It is not
merged into the remaining core driver because,

1) atari_scsi defines SUPPORT_TAGS but leaves FLAG_TAGGED_QUEUING disabled
by default, which indicates that it is mostly undesirable.

2) I'm told that it doesn't work correctly when enabled.

3) The algorithm does not make use of block layer tags which it will have
to do because scmd->tag is deprecated.

4) sun3_scsi doesn't define SUPPORT_TAGS at all, yet the the SUPPORT_TAGS
macro interacts with the CONFIG_SUN3 macro in 'interesting' ways.

5) Compile-time configuration with macros like SUPPORT_TAGS caused the
configuration space to explode, leading to untestable and unmaintainable
code that is too hard to reason about.

The merge_contiguous_buffers() code is also abandoned. This was unused
by sun3_scsi. Only atari_scsi used it and then only on TT, because only TT
supports scatter/gather. I suspect that the TT would work fine with
ENABLE_CLUSTERING instead. If someone can benchmark the difference then
perhaps the merge_contiguous_buffers() code can be be justified. Until
then we are better off without the extra complexity.
Signed-off-by: NFinn Thain <fthain@telegraphics.com.au>
Reviewed-by: NHannes Reinecke <hare@suse.com>
Tested-by: NMichael Schmitz <schmitzmic@gmail.com>
Tested-by: NOndrej Zary <linux@rainbow-software.org>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

Add support for the custom Sun 3 DMA logic to the NCR5380.c core driver.
This code is copied from atari_NCR5380.c.
Signed-off-by: NFinn Thain <fthain@telegraphics.com.au>
Reviewed-by: NHannes Reinecke <hare@suse.com>
Tested-by: NMichael Schmitz <schmitzmic@gmail.com>
Tested-by: NOndrej Zary <linux@rainbow-software.org>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

Add support for the Atari ST DMA chip to the NCR5380.c core driver.
This code is copied from atari_NCR5380.c.
Signed-off-by: NFinn Thain <fthain@telegraphics.com.au>
Reviewed-by: NHannes Reinecke <hare@suse.com>
Tested-by: NMichael Schmitz <schmitzmic@gmail.com>
Tested-by: NOndrej Zary <linux@rainbow-software.org>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

Adopt the DMA implementation from atari_NCR5380.c. This means that
atari_scsi and sun3_scsi can make use of the NCR5380.c core driver
and the atari_NCR5380.c driver fork can be made redundant.
Signed-off-by: NFinn Thain <fthain@telegraphics.com.au>
Reviewed-by: NHannes Reinecke <hare@suse.com>
Tested-by: NMichael Schmitz <schmitzmic@gmail.com>
Tested-by: NOndrej Zary <linux@rainbow-software.org>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

Standardize the DMA setup hooks so that the DMA implementation in
atari_NCR5380.c can be reconciled with pseudo DMA implementation in
NCR5380.c.

Calls to NCR5380_dma_recv_setup() and NCR5380_dma_send_setup() return
a negative value on failure, zero on PDMA transfer success and a positive
byte count for DMA setup success.

This convention is not entirely new, but is now applied consistently.

Also remove a pointless Status Register access: the *phase assignment is
redundant because after NCR5380_transfer_dma() returns control to
NCR5380_information_transfer(), that routine then returns control
to NCR5380_main(), which means *phase is dead.
Signed-off-by: NFinn Thain <fthain@telegraphics.com.au>
Reviewed-by: NHannes Reinecke <hare@suse.com>
Tested-by: NMichael Schmitz <schmitzmic@gmail.com>
Tested-by: NOndrej Zary <linux@rainbow-software.org>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>