Relocate get_ata_protocol() to a common location, as future hw versions
will require it.  Also rename with "hisi_sas_" prefix for consistency.
Signed-off-by: NXiang Chen <chenxiang66@hisilicon.com>
Signed-off-by: NJohn Garry <john.garry@huawei.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

Currently hisi_hba.lock is locked to deliver and receive a command
to/from any hw queue. This causes much contention at high data-rates.

To boost performance, lock on a per queue basis for sending and
receiving commands to/from hw.

Certain critical regions still need to be locked in the delivery and
completion stages with hisi_hba.lock.

New element hisi_sas_device.dq is added to store the delivery queue for
a device, so it does not need to be needlessly re-calculated for every
task.
Signed-off-by: NXiang Chen <chenxiang66@hisilicon.com>
Signed-off-by: NJohn Garry <john.garry@huawei.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

Currently hisi_sas_device.device_id is a u64. This can create a problem
in selecting the queue for a device, in that this code does a 64b
division on device id. For some 32b systems, 64b division is slow and
the lib reference must be explicitly included.

The device id does not need to be 64b in size, so, as a solution, just
make as an int.

Also, struct hisi_sas_device elements are re-ordered to improve packing
efficiency.
Signed-off-by: NJohn Garry <john.garry@huawei.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

We need to check for timeout before task status, or the task will be
mistook as completed internal abort command.  Also add protection for
sas_task.task_state_flags in hisi_sas_tmf_timedout().
Signed-off-by: NXiang Chen <chenxiang66@hisilicon.com>
Signed-off-by: NJohn Garry <john.garry@huawei.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

Set lpfc driver revision to 11.4.0.0
Signed-off-by: NDick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: NJames Smart <james.smart@broadcom.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

Administrator intervention is currently required to get good numbers
when switching from running latency tests to IOPS tests.

The configured interrupt coalescing values will greatly effect the
results of these tests.  Currently, the driver has a single coalescing
value set by values of the module attribute.  This patch changes the
driver to support auto-configuration of the coalescing value based on
the total number of outstanding IOs and average number of CQEs processed
per interrupt for an EQ.  Values are checked every 5 seconds.

The driver defaults to the automatic selection. Automatic selection can
be disabled by the new lpfc_auto_imax module_parameter.

Older hardware can only change interrupt coalescing by mailbox
command. Newer hardware supports change via a register. The patch
support both.
Signed-off-by: NDick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: NJames Smart <james.smart@broadcom.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

Addressed the following reported defects:

** CID 1411552:  Control flow issues  (MISSING_BREAK)
/drivers/scsi/lpfc/lpfc_sli.c: 13259 in lpfc_sli4_nvmet_handle_rcqe()

** CID 1411553:  Memory - illegal accesses  (OVERRUN)
/drivers/scsi/lpfc/lpfc_sli.c: 16218 in lpfc_fc_frame_check()

** CID 1411553:  Memory - illegal accesses  (OVERRUN)
   Overrunning array "lpfc_rctl_names" of 202 8-byte elements at element
   index 244 (byte offset 1952) using index "fc_hdr->fh_r_ctl" (which
   evaluates to 244).

** CID 1411554:  Null pointer dereferences  (REVERSE_INULL)
/drivers/scsi/lpfc/lpfc_nvmet.c: 2131 in lpfc_nvmet_unsol_fcp_abort_cmp()

** CID 1411555:  Memory - illegal accesses  (UNINIT)
/drivers/scsi/lpfc/lpfc_nvmet.c: 180 in lpfc_nvmet_ctxbuf_post()
Signed-off-by: NDick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: NJames Smart <james.smart@broadcom.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

vports cannot login to target.

For vports, lpfc_nodelist is allocated for targets only on completion of
GFF_ID command. Driver checks if lpfc_nodelist exists for target before
sending GFF_ID. So, GFF_ID and PLOGI are not sent.

As mentioned by the comment in lpfc_prep_node_fc4type() routine, do not
send GFF_ID only if this NPortID is previously identified as FCP
target. Send GFF_ID if it is a newly identified remote port from GID_FT
response.
Signed-off-by: NDick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: NJames Smart <james.smart@broadcom.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

The nvmet driver was rejecting the initiator's PRLI because its reg_rpi
for the PLOGI was still outstanding.  The initiator would resend the
PRLI without delay and get the same answer.  The PRLI retries would
exhaust causing the nvme initiator to set the nvmet ndlp to UNMAPPED.

The driver's lpfc_els_retry handler did not have a policy for an LS_RJT
with explanation CMD_IN_PROGRESS for PRLI or NVME_PRLI.  This caused the
delay to remain at 0 but retry set 1.

Fix: When the ELS response is LS_RJT, TPC and the command was PRLI or
NVME_PRLI, just set the delay to 1000 mS to get a 1 second delay on the
PRLI retry.  This was enough to allow the REG_RPI to complete at the
target.
Signed-off-by: NDick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: NJames Smart <james.smart@broadcom.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

Kernel panic when log_verbose is set to 0xffffffff

phba->pport is dereferenced before it is initialized

Fix: Do not dereference phba->pport if it is NULL
Signed-off-by: NDick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: NJames Smart <james.smart@broadcom.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

System panic with general protection fault during driver load

The driver uses a static array sli4_hba.handler_name to store the irq
handler names. If the io_channel_irqs exceeds the pre-allocated size
(32+1), then the driver will overwrite other fields of sli4_hba.

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

Null pointer dereference when BFS VM is powered off

The driver incorrectly uses sli3_ring on SLI-4 adapters

Use the correct ring structure based on sli_rev
Signed-off-by: NDick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: NJames Smart <james.smart@broadcom.com>
Tested-by: NRaphael Silva <raphasil@linux.vnet.ibm.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

On hbacmd reset failure, observing wrong string "nline" in kernel log.

On failure, non negative value (1) is returned from sysfs store
routine. It is interpreted as count by kernel and store routine is
called again with the remaining characters as input.

Fix: Return negative error code (-EIO) in case of failure.
Signed-off-by: NDick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: NJames Smart <james.smart@broadcom.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

NVME FC counters don't reflect actual results

Since counters are not atomic, or protected by a lock, the values often
get screwed up.

Make them atomic, like NVMET.  Fix up sysfs and debugfs display
accordingly Added Outstanding IOs to stats display
Signed-off-by: NDick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: NJames Smart <james.smart@broadcom.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

Observing lpfc port down after issuing hbacmd reset command

Failure in posting SGL buffers. If there is only one SGL buffer and rrq
is valid for its XRI, we are rightly returning NULL but not adding the
buffer back to the SGL list. So, number of buffers become less than
total count and repost fails during reset.

Add SGL buffer back to list before returning NULL.
Signed-off-by: NDick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: NJames Smart <james.smart@broadcom.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

When unloading the driver, the NVMET driver would wait the full 30
seconds for its UNMAPPED initiator node to get removed before continuing
with the unload process.  NVMEI worked correctly.

For each rport put into UNMAPPED or MAPPED state by NVMET, the driver
puts a reference on the NDLP.  The difference is that NVMEI has a
unregister call for its rports and the extra reference is removed in the
unregister process.  For NVMET, the driver has to remove the reference
explicitly when dropping out of UNMAPPED or MAPPED because there is no
unregister call.

Add a call to lpfc_nlp_put on the ndlp when NVMET and the old state was
UNMAPPED or MAPPED.
Signed-off-by: NDick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: NJames Smart <james.smart@broadcom.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

Lun Priority level shown as NA

Remote port is not getting registered for nameserver and fdmi.  Due to
which dfc SendCTPassThru cmd is failing.

Made changes to register the remote port for both.
Signed-off-by: NDick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: NJames Smart <james.smart@broadcom.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

Inconsistent error messages and context state checks

Context state sanity checks were not accurate or inconsistent in the
code paths.

Separated LS context states from FCP.
Added and modified context state sanity checks.
Use context state to determine if a sol or unsol ABORT is needed.
Signed-off-by: NDick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: NJames Smart <james.smart@broadcom.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

While debugging Devloss and recovery, debugfs and sysfs were found to
not show the NVME port roles consistently.

The port role FC_PORT_ROLE_NVME_DISCOVERY was added with the devloss
bringup and the other issues were just oversight.

Add NVME Target and DISCSRVC to debugfs nodeinfo and sysfs nvme info
handlers. The full port role was added to the NVME data only not the
generic nodelist.
Signed-off-by: NDick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: NJames Smart <james.smart@broadcom.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

As the devloss API was implemented in the nvmei driver, an evaluation of
the nvme transport and the lpfc driver showed dual management of the
rports.  This creates a bug possibility when the thread count and SAN
size increases.

The nvmei driver code was based on a very early transport and was not
revisited until the devloss API was introduced.

Remove the listhead in the driver's rport data structure and the
listhead in the driver's lport data structure.  Remove all rport_list
traversal.  Convert the driver to use the nrport (nvme rport) pointer
that is now NULL or nonNULL depending on a devloss action.  Convert
debugfs and nvme_info in sysfs to use the fc_nodes list in the vport.
Signed-off-by: NDick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: NJames Smart <james.smart@broadcom.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

Add nvme initiator devloss support

The existing implementation was based on no devloss behavior in the
transport (e.g. immediate teardown) so code didn't properly handle
delayed nvme rport device unregister calls.  In addition, the driver was
not correctly cycling the rport port role for each
register-unregister-reregister process.

This patch does the following:

Rework the code to properly handle rport device unregister calls and
potential re-allocation of the remoteport structure if the port comes
back in under dev_loss_tmo.

Correct code that was incorrectly cycling the rport port role for each
register-unregister-reregister process.

Prep the code to enable calling the nvme_fc transport api to dynamically
update dev_loss_tmo when the scsi sysfs interface changes it.

Memset the rpinfo structure in the registration call to enforce "accept
nvme transport defaults" in the registration call.  Driver parameters do
influence the dev_loss_tmo transport setting dynamically.

Simplifies the register function: the driver was incorrectly searching
its local rport list to determine resume or new semantics, which is not
valid as the transport already handles this.  The rport was resumed if
the rport handed back matches the ndlp->nrport pointer.  Otherwise,
devloss fired and the ndlp's nrport is NULL.
Signed-off-by: NDick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: NJames Smart <james.smart@broadcom.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

Merge some quoted strings to improve readability and to save some lines
of code.
Signed-off-by: NChristophe JAILLET <christophe.jaillet@wanadoo.fr>
Acked-by: NChad Dupuis <chad.dupuis@cavium.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

Replace some 'dma_alloc_coherent+memset' by some quivalent
'dma_zalloc_coherent' in order to reduce code verbosity
Signed-off-by: NChristophe JAILLET <christophe.jaillet@wanadoo.fr>
Acked-by: NChad Dupuis <chad.dupuis@cavium.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

We should return -ENOMEM in case of memory allocation error, as done
elsewhere in this function.

[mkp: fixed typo]

Fixes: 61d8658b ("scsi: qedf: Add QLogic FastLinQ offload FCoE driver framework.")
Signed-off-by: NChristophe JAILLET <christophe.jaillet@wanadoo.fr>
Acked-by: NChad Dupuis <chad.dupuis@cavium.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

The semaphore 'fs_api_semaphore' is used as a simple mutex, so it should
be written as one. Semaphores are going away in the future.
Signed-off-by: NBinoy Jayan <binoy.jayan@linaro.org>
Reviewed-by: NArnd Bergmann <arnd@arndb.de>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

The semaphore 'fm_api_semaphore' is used as a simple mutex, so it should
be written as one. Semaphores are going away in the future.
Signed-off-by: NBinoy Jayan <binoy.jayan@linaro.org>
Reviewed-by: NArnd Bergmann <arnd@arndb.de>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

Fixes following 0-day kernel build warnings:

drivers/scsi/qla2xxx/qla_init.c:6407:50: warning: format '%lx' expects
argument of type 'long unsigned int', but argument 5 has type 'unsigned
int' [-Wformat=]
drivers/scsi/qla2xxx/qla_init.c:6709:50: warning: format '%lx'
expects argument of type 'long unsigned int', but argument 5 has
type 'unsigned int' [-Wformat=]

Fixes: b95b9452 ("scsi: qla2xxx: Fix crash due to mismatch mumber of Q-pair creation for Multi queue")
Signed-off-by: NHimanshu Madhani <himanshu.madhani@cavium.com>
Signed-off-by: NGiridhar Malavali <giridhar.malavali@cavium.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

An earlier commit ed7fb808477b846bb2 ("scsi: qla2xxx: Remove redundant
wait when target is stopped.") removed a null check on ha->tgt.tgt_ops
and replaced it with a new check that null checked tgt, thus making the
subsequent null check on tgt totally redundant. Remove it.

Detected by CoverityScan, CID#1440452 ("Logically Dead Code")
Signed-off-by: NColin Ian King <colin.king@canonical.com>
Acked-by: NHimanshu Madhani <himanshu.madhani@cavium.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

Add PCI id and variant ops for Intel CNL UFS host controller.
Signed-off-by: NAdrian Hunter <adrian.hunter@intel.com>
Reviewed-by: NChristoph Hellwig <hch@lst.de>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

Put PM functions under correct config options and use standard PM macros
to set callbacks.
Signed-off-by: NAdrian Hunter <adrian.hunter@intel.com>
Reviewed-by: NChristoph Hellwig <hch@lst.de>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

functions lpfc_nvmet_cleanup_io_context and lpfc_nvmet_setup_io_context
can be made static as they do not need to be in global scope.

Cleans up sparse warnings:
  "warning: symbol 'lpfc_nvmet_cleanup_io_context' was not declared.
   Should it be static?"
  "warning: symbol 'lpfc_nvmet_setup_io_context' was not declared.
   Should it be static?"
Signed-off-by: NColin Ian King <colin.king@canonical.com>
Acked-by: NJames Smart <james.smart@broadcom.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

Since the SCSI core zeroes driver-private command data, remove
that code from the xen-scsifront driver.
Signed-off-by: NBart Van Assche <bart.vanassche@sandisk.com>
Reviewed-by: NHannes Reinecke <hare@suse.com>
Reviewed-by: NJuergen Gross <jgross@suse.com>
Reviewed-by: NChristoph Hellwig <hch@lst.de>
Cc: xen-devel@lists.xenproject.org
Cc: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

Since the SCSI core zeroes driver-private command data, remove
that code from the virtio driver.
Signed-off-by: NBart Van Assche <bart.vanassche@sandisk.com>
Reviewed-by: NHannes Reinecke <hare@suse.com>
Reviewed-by: NChristoph Hellwig <hch@lst.de>
Cc: Michael S. Tsirkin <mst@redhat.com>
Cc: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

Since the SCSI core zeroes driver-private command data, remove that code
from the snic driver.
Signed-off-by: NBart Van Assche <bart.vanassche@sandisk.com>
Reviewed-by: NHannes Reinecke <hare@suse.com>
Reviewed-by: NNarsimhulu Musini <nmusini@cisco.com>
Reviewed-by: NChristoph Hellwig <hch@lst.de>
Cc: Sesidhar Baddela <sebaddel@cisco.com>
Cc: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

This patch reduces code duplication. There are two functional changes in
this patch:

- It causes scsi_mq_prep_fn() to clear driver-private command data, just
  like the already upstream commit 1bad6c4a ("scsi: zero per-cmd
  private driver data for each MQ I/O").

- The initialization of .prot_sdb is moved from scsi_mq_prep_fn() into
  scsi_init_request().

[mkp: applied by hand]
Signed-off-by: NBart Van Assche <bart.vanassche@sandisk.com>
Cc: Hannes Reinecke <hare@suse.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Johannes Thumshirn <jthumshirn@suse.de>
Reviewed-by: NChristoph Hellwig <hch@lst.de>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

This patch does not change any functionality but makes the next patch
easier to read.
Signed-off-by: NBart Van Assche <bart.vanassche@sandisk.com>
Reviewed-by: NChristoph Hellwig <hch@lst.de>
Cc: Hannes Reinecke <hare@suse.com>
Cc: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

Just like for the scsi-mq code path, in the single queue SCSI code path
only add commands to the per-device command list if required by the SCSI
LLD. This patch will make it easier to merge the single-queue and
multiqueue command initialization code.
Signed-off-by: NBart Van Assche <bart.vanassche@sandisk.com>
Reviewed-by: NChristoph Hellwig <hch@lst.de>
Reviewed-by: NHannes Reinecke <hare@suse.com>
Cc: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

If a device is blocked, make __scsi_remove_device() cause it to
transition to the DEL state. This means that all the commands issued in
.shutdown() will error in the mid-layer, thus making the removal proceed
without being stopped.

This patch is a slightly modified version of a patch from James
Bottomley. This patch avoids that the following lockup occurs:

Call Trace:
 schedule+0x35/0x80
 schedule_timeout+0x237/0x2d0
 io_schedule_timeout+0xa6/0x110
 wait_for_completion_io+0xa3/0x110
 blk_execute_rq+0xdf/0x120
 scsi_execute+0xce/0x150 [scsi_mod]
 scsi_execute_req_flags+0x8f/0xf0 [scsi_mod]
 sd_sync_cache+0xa9/0x190 [sd_mod]
 sd_shutdown+0x6a/0x100 [sd_mod]
 sd_remove+0x64/0xc0 [sd_mod]
 __device_release_driver+0x8d/0x120
 device_release_driver+0x1e/0x30
 bus_remove_device+0xf9/0x170
 device_del+0x127/0x240
 __scsi_remove_device+0xc1/0xd0 [scsi_mod]
 scsi_forget_host+0x57/0x60 [scsi_mod]
 scsi_remove_host+0x72/0x110 [scsi_mod]
 srp_remove_work+0x8b/0x200 [ib_srp]
Reported-by: NIsrael Rukshin <israelr@mellanox.com>
Signed-off-by: NBart Van Assche <bart.vanassche@sandisk.com>
Reviewed-by: NHannes Reinecke <hare@suse.de>
Cc: James Bottomley <James.Bottomley@HansenPartnership.com>
Cc: Israel Rukshin <israelr@mellanox.com>
Cc: Max Gurtovoy <maxg@mellanox.com>
Cc: Benjamin Block <bblock@linux.vnet.ibm.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

This patch does not change any functionality.
Signed-off-by: NBart Van Assche <bart.vanassche@sandisk.com>
Reviewed-by: NHannes Reinecke <hare@suse.de>
Reviewed-by: NChristoph Hellwig <hch@lst.de>
Cc: Israel Rukshin <israelr@mellanox.com>
Cc: Max Gurtovoy <maxg@mellanox.com>
Cc: Benjamin Block <bblock@linux.vnet.ibm.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>

Serializing SCSI device state changes avoids that two state changes can
occur concurrently, e.g. the state changes in scsi_target_block() and
__scsi_remove_device(). This serialization is essential to make patch
"Make __scsi_remove_device go straight from BLOCKED to DEL" work
reliably.

Enable this mechanism for all scsi_target_*block() callers but not for
the scsi_internal_device_unblock() calls from the mpt3sas driver because
that driver can call scsi_internal_device_unblock() from atomic context.
Signed-off-by: NBart Van Assche <bart.vanassche@sandisk.com>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Hannes Reinecke <hare@suse.com>
Cc: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>