If sending IOs to many disks from single queue, it is possible that the
queue may be full. To avoid the situation, change queue depth from 512 to
4096 which is the max number of IOs for v3 hw.

Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com>
Signed-off-by: John Garry <john.garry@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Add an interface to manually trigger a debugfs dump.

Signed-off-by: Luo Jiaxing <luojiaxing@huawei.com>
Signed-off-by: John Garry <john.garry@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

This patch adds support for DIX to v3 hw driver.

For this, we build upon support for DIF, most significantly is adding new
DMA map and unmap paths.

Some pre-existing macro precedence issues are also tidied. They were
detected by checkpatch --strict.

Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com>
Signed-off-by: John Garry <john.garry@huawei.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

If you look at the bindings for the UFS Host Controller it says:

- compatible: must contain "jedec,ufs-1.1" or "jedec,ufs-2.0", may
              also list one or more of the following:
                 "qcom,msm8994-ufshc"
                 "qcom,msm8996-ufshc"
                 "qcom,ufshc"

My reading of that is that it's fine to just have either of these:
1. "qcom,msm8996-ufshc", "jedec,ufs-2.0"
2. "qcom,ufshc", "jedec,ufs-2.0"

As far as I can tell neither of the above is actually a good idea.

For #1 it turns out that the driver currently only keys off the
compatible string "qcom,ufshc" so it won't actually probe.

For #2 the driver won't probe but it's not a good idea to keep the SoC
name out of the compatible string.

Let's update the compatible string to make it really explicit.  We'll
include a nod to the existing driver and the old binding and say that
we should always include the "qcom,ufshc" string in addition to the
SoC compatible string.

While we're at it we'll also include another example SoC known to have
UFS: sdm845.

Fixes: 47555a5c ("scsi: ufs: make the UFS variant a platform device")
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Reviewed-by: Vivek Gautam <vivek.gautam@codeaurora.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Clang warns several times in the scsi subsystem (trimmed for brevity):

drivers/scsi/hpsa.c:6209:7: warning: overflow converting case value to
switch condition type (2147762695 to 18446744071562347015) [-Wswitch]
        case CCISS_GETBUSTYPES:
             ^
drivers/scsi/hpsa.c:6208:7: warning: overflow converting case value to
switch condition type (2147762694 to 18446744071562347014) [-Wswitch]
        case CCISS_GETHEARTBEAT:
             ^

The root cause is that the _IOC macro can generate really large numbers,
which don't fit into type 'int', which is used for the cmd parameter in
the ioctls in scsi_host_template. My research into how GCC and Clang are
handling this at a low level didn't prove fruitful. However, looking at
the rest of the kernel tree, all ioctls use an 'unsigned int' for the
cmd parameter, which will fit all of the _IOC values in the scsi/ata
subsystems.

Make that change because none of the ioctls expect a negative value for
any command, it brings the ioctls inline with the reset of the kernel,
and it removes ambiguity, which is never good when dealing with compilers.

Link: https://github.com/ClangBuiltLinux/linux/issues/85
Link: https://github.com/ClangBuiltLinux/linux/issues/154
Link: https://github.com/ClangBuiltLinux/linux/issues/157


Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
Acked-by: Bradley Grove <bgrove@attotech.com>
Acked-by: Don Brace <don.brace@microsemi.com>
Reviewed-by: Bart Van Assche <bvanassche@acm.org>
Tested-by: Nick Desaulniers <ndesaulniers@google.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Update lpfc version to 12.2.0.0

Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

For files modified as part of 12.2.0.0 patches, update copyright to 2019

Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Various null pointer dereference and general protection fault panics occur
when there is a link bounce under load. There are a large number of "error"
message 6413 indicating "bad release".

The issues resolve to list corruptions due to missing or inconsistent lock
protection. Lockups are due to nested locks in the unsolicited abort
path. The unsolicited abort path calls the wrong abort processing
routine. There was also duplicate context release while aborts were still
active in the hardware.

Removed duplicate locks and added lock protection around list item
removal. Commonized lock handling around the abort processing routines.
Prevent context release while still in ABTS list.

Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

When the transport calls into the lpfc target to release an IO job
structure, which corresponds to an exchange, and if the driver was waiting
for an exchange in order to post a previously received command to the
transport, the driver immediately takes the IO job and reuses the context
for the prior command and calls nvmet_fc_rcv_fcp_req() to tell the
transport about a newly received command.

Problem is, the execution of the IO job release may be in the context of
the back end driver and its bio completion handlers, thus it may be in a
irq context and protection code kicks in in the bio and request layers that
are subsequently called.

Rework lpfc so that instead of immediately upcalling, queue it to a
deferred work thread and have the thread make the upcall.

Took advantage of this change to remove duplicated code with the normal
command receive path that preps the IO job and upcalls nvmet_fc. Created a
common routine both paths use.

Also corrected some errors that were found during review of the context
freeing and reuse - basically unlocked operations and a somewhat disjoint
set of calls to release associated job elements. Cleaned up this path and
added locks for coherency.

Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

The conversion to enable SCSI and NVME fc4 support ran into an issue with
NPIV support. With NVME, NPIV is not currently supported, but with SCSI it
was. The driver reverted to its lowest setting meaning NPIV with SCSI was
not allowed.

Convert the NPIV checks and implementation so that SCSI can continue to
allow NPIV support.

Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

A scsi host lock is taken on every io completion to check whether the abort
handler is waiting on the io completion. This is an expensive lock to take
on all completion when rarely in an abort condition.

Replace scsi host lock with command-specific lock. Synchronize completion
and abort paths by new cmd lock. Ensure all flag changing and nulling of
context pointers taken under lock.  When adding lock to task management
abort, realized it was missing other synchronization locks. Added that
synchronization to match normal paths.

Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Now that performance mods don't split resources by protocol and enable both
protocols by default, there's no reason not to enable concurrent SCSI and
NVME fc4 support.

Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

The work done to date utilized the number of present cpus when sizing
per-cpu structures. Structures should have been sized based on the max
possible cpu count.

Convert the driver over to possible cpu count for sizing allocation.

Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Current driver uses the older IRQ API for MSIX allocation

Change driver to utilize pci_alloc_irq_vectors when allocating IRQ vectors.

Make lpfc_cpu_affinity_check use pci_irq_get_affinity to determine how the
kernel mapped all the IRQs.

Remove msix_entries from SLI4 structure, replaced with pci_irq_vector()
usage.

Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

When driving high iop counts, auto_imax coalescing kicks in and drives the
performance to extremely small iops levels.

There are two issues:

 1) auto_imax is enabled by default. The auto algorithm, when iops gets
    high, divides the iops by the hdwq count and uses that value to
    calculate EQ_Delay. The EQ_Delay is set uniformly on all EQs whether
    they have load or not. The EQ_delay is only manipulated every 5s (a
    long time). Thus there were large 5s swings of no interrupt delay
    followed by large/maximum delay, before repeating.

 2) When processing a CQ, the driver got mixed up on the rate of when
    to ring the doorbell to keep the chip appraised of the eqe or cqe
    consumption as well as how how long to sit in the thread and
    process queue entries. Currently, the driver capped its work at
    64 entries (very small) and exited/rearmed the CQ.  Thus, on heavy
    loads, additional overheads were taken to exit and re-enter the
    interrupt handler. Worse, if in the large/maximum coalescing
    windows,k it could be a while before getting back to servicing.

The issues are corrected by the following:

 - A change in defaults. Auto_imax is turned OFF and fcp_imax is set
   to 0. Thus all interrupts are immediate.

 - Cleanup of field names and their meanings. Existing names were
   non-intuitive or used for duplicate things.

 - Added max_proc_limit field, to control the length of time the
   handlers would service completions.

 - Reworked EQ handling:
    Added common routine that walks eq, applying notify interval and max
      processing limits. Use queue_claimed to claim ownership of the queue
      while processing. Always rearm the queue whenever the common routine
      is called.
    Rework queue element processing, namely to eliminate hba_index vs
      host_index. Only one index is necessary. The queue entry can be
      marked invalid and the host_index updated immediately after eqe
      processing.
    After rework, xx_release routines are now DB write functions. Renamed
      the routines as such.
    Moved lpfc_sli4_eq_flush(), which does similar action, to same area.
    Replaced the 2 individual loops that walk an eq with a call to the
      common routine.
    Slightly revised lpfc_sli4_hba_handle_eqe() calling syntax.
    Added per-cpu counters to detect interrupt rates and scale
      interrupt coalescing values.

 - Reworked CQ handling:
    Added common routine that walks cq, applying notify interval and max
      processing limits. Use queue_claimed to claim ownership of the queue
      while processing. Always rearm the queue whenever the common routine
      is called.
    Rework queue element processing, namely to eliminate hba_index vs
      host_index. Only one index is necessary. The queue entry can be
      marked invalid and the host_index updated immediately after cqe
      processing.
    After rework, xx_release routines are now DB write functions.  Renamed
      the routines as such.
    Replaced the 3 individual loops that walk a cq with a call to the
      common routine.
    Redefined lpfc_sli4_sp_handle_mcqe() to commong handler definition with
      queue reference. Add increment for mbox completion to handler.

 - Added a new module/sysfs attribute: lpfc_cq_max_proc_limit To allow
   dynamic changing of the CQ max_proc_limit value being used.

Although this leaves an EQ as an immediate interrupt, that interrupt will
only occur if a CQ bound to it is in an armed state and has cqe's to
process.  By staying in the cq processing routine longer, high loads will
avoid generating more interrupts as they will only rearm as the processing
thread exits. The immediately interrupt is also beneficial to idle or
lower-processing CQ's as they get serviced immediately without being
penalized by sharing an EQ with a more loaded CQ.

Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Review of the eq coalescing logic showed the code was a bit fragmented.
Sometimes it would save/set via an interrupt max value, while in others it
would do so via a usdelay. There were also two places changing eq delay,
one place that issued mailbox commands, and another that changed via
register writes if supported.

Clean this up by:

 - Standardizing the operation of lpfc_modify_hba_eq_delay() routine so
   that it is always told of a us delay to impose. The routine then chooses
   the best way to set that - via register or via mbx.

 - Rather than two value types stored in eq->q_mode (usdelay if change via
   register, imax if change via mbox) - q_mode always contains usdelay.
   Before any value change, old vs new value is compared and only if
   different is a change done.

 - Revised the dmult calculation. dmult is not set based on overall imax
   divided by hardware queues - instead imax applies to a single cpu and
   the value will be replicated to all cpus.

Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

So far MSIX vector allocation assumed it would be 1:1 with hardware
queues. However, there are several reasons why fewer MSIX vectors may be
allocated than hardware queues such as the platform being out of vectors or
adapter limits being less than cpu count.

This patch reworks the MSIX/EQ relationships with the per-cpu hardware
queues so they can function independently. MSIX vectors will be equitably
split been cpu sockets/cores and then the per-cpu hardware queues will be
mapped to the vectors most efficient for them.

Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

The desired affinity for the hardware queue behavior is for hdwq 0 to be
affinitized with cpu 0, hdwq 1 to cpu 1, and so on.  The implementation so
far does not do this if the number of cpus is greater than the number of
hardware queues (e.g. hardware queue allocation was administratively
reduced or hardware queue resources could not scale to the cpu count).

Correct the queue affinitization logic when queue count is less than
cpu count.

Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Default behavior is to use the information from the upper IO stacks to
select the hardware queue to use for IO submission.  Which typically has
good cpu affinity.

However, the driver, when used on some variants of the upstream kernel, has
found queuing information to be suboptimal for FCP or IO completion locked
on particular cpus.

For command submission situations, the lpfc_fcp_io_sched module parameter
can be set to specify a hardware queue selection policy that overrides the
os stack information.

For IO completion situations, rather than queing cq processing based on the
cpu servicing the interrupting event, schedule the cq processing on the cpu
associated with the hardware queue's cq.

Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

The XRI get/put lists were partitioned per hardware queue. However, the
adapter rarely had sufficient resources to give a large number of resources
per queue. As such, it became common for a cpu to encounter a lack of XRI
resource and request the upper io stack to retry after returning a BUSY
condition. This occurred even though other cpus were idle and not using
their resources.

Create as efficient a scheme as possible to move resources to the cpus that
need them. Each cpu maintains a small private pool which it allocates from
for io. There is a watermark that the cpu attempts to keep in the private
pool.  The private pool, when empty, pulls from a global pool from the
cpu. When the cpu's global pool is empty it will pull from other cpu's
global pool. As there many cpu global pools (1 per cpu or hardware queue
count) and as each cpu selects what cpu to pull from at different rates and
at different times, it creates a radomizing effect that minimizes the
number of cpu's that will contend with each other when the steal XRI's from
another cpu's global pool.

On io completion, a cpu will push the XRI back on to its private pool.  A
watermark level is maintained for the private pool such that when it is
exceeded it will move XRI's to the CPU global pool so that other cpu's may
allocate them.

On NVME, as heartbeat commands are critical to get placed on the wire, a
single expedite pool is maintained. When a heartbeat is to be sent, it will
allocate an XRI from the expedite pool rather than the normal cpu
private/global pools. On any io completion, if a reduction in the expedite
pools is seen, it will be replenished before the XRI is placed on the cpu
private pool.

Statistics are added to aid understanding the XRI levels on each cpu and
their behaviors.

Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Now that the lower half has much better per-cpu parallelization using the
hardware queues, the SCSI MQ support needs to be tied into it.

The involves the following mods:

 - Use the hardware queue info from the midlayer to help select the
   hardware queue to utilize. This required change to the get_scsi-buf_xxx
   routines.

 - Remove lpfc_sli4_scmd_to_wqidx_distr() routine. No longer needed.

 - Includes fix for SLI-3 that does not have multi queue parallelization.

Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

SLI4 nvme functions are passing the SLI3 ring number when posting wqe to
hardware. This should be indicating the hardware queue to use, not the ring
number.

Replace ring number with the hardware queue that should be used.

Note: SCSI avoided this issue as it utilized an older lfpc_issue_iocb
routine that properly adapts.

Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Many io statistics were being sampled and saved using adapter-based data
structures. This was creating a lot of contention and cache thrashing in
the I/O path.

Move the statistics to the hardware queue data structures.  Given the
per-queue data structures, use of atomic types is lessened.

Add new sysfs and debugfs stat routines to collate the per hardware queue
values and report at an adapter level.

Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Similar to the io execution path that reports cpu context information, the
debugfs routines for cpu information needs to be aligned with new hardware
queue implementation.

Convert debugfs cnd nvme cpucheck statistics to report information per
Hardware Queue.

Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Both NVME and SCSI aborts are now processed off the CQ workqueue and do not
generate events for the slowpath any more.

Remove the unused event code.

Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Once the IO buff allocations were made shared, there was a single XRI
buffer list shared by all hardware queues.  A single list isn't great for
performance when shared across the per-cpu hardware queues.

Create a separate XRI IO buffer get/put list for each Hardware Queue.  As
SGLs and associated IO buffers get allocated/posted to the firmware; round
robin their assignment across all available hardware Queues so that there
is an equitable assignment.

Modify SCSI and NVME IO submit code paths to use the Hardware Queue logic
for XRI allocation.

Add a debugfs interface to display hardware queue statistics

Added new empty_io_bufs counter to track if a cpu runs out of XRIs.

Replace common_ variables/names with io_ to make meanings clearer.

Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Currently, both nvme and fcp each have their own concept of an io_channel,
which is a combination wq/cq and associated msix.  Different cpus would
share an io_channel.

The driver is now moving to per-cpu wq/cq pairs and msix vectors.  The
driver will still use separate wq/cq pairs per protocol on each cpu, but
the protocols will share the msix vector.

Given the elimination of the nvme and fcp io channels, the module
parameters will be removed.  A new parameter, lpfc_hdw_queue is added which
allows the wq/cq pair allocation per cpu to be overridden and allocated to
lesser value. If lpfc_hdw_queue is zero, the number of pairs allocated will
be based on the number of cpus. If non-zero, the parameter specifies the
number of queues to allocate. At this time, the maximum non-zero value is
64.

To manage this new paradigm, a new hardware queue structure is created to
track queue activity and relationships.

As MSIX vector allocation must be known before setting up the
relationships, msix allocation now occurs before queue datastructures are
allocated. If the number of vectors allocated is less than the desired
hardware queues, the hardware queue counts will be reduced to the number of
vectors

Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

There is a extra queue and msix vector for expresslane. Now that the driver
will be doing queues per cpu, this oddball queue is no longer needed.
Expresslane will utilize the normal per-cpu queues.

Updated debugfs sli4 queue output to go along with the change

Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Currently, both NVME and SCSI get their IO buffers from separate
pools. XRI's are associated 1:1 with IO buffers, so XRI's are also split
between protocols.

Eliminate the independent pools and use a single pool. Each buffer
structure now has a common section and a protocol section. Per protocol
routines for SGL initialization are removed and replaced by common
routines. Initialization of the buffers is only done on the common area.
All other fields, which are protocol specific, are initialized when the
buffer is allocated for use in the per-protocol allocation routine.

In the past, the SCSI side allocated IO buffers as part of slave_alloc
calls until the maximum XRIs for SCSI was reached. As all XRIs are now
common and may be used for either protocol, allocation for everything is
done as part of adapter initialization and the scsi side has no action in
slave alloc.

As XRI's are no longer split, the lpfc_xri_split module parameter is
removed.

Adapters based on SLI3 will continue to use the older scsi_buf_list_get/put
routines.  All SLI4 adapters utilize the new IO buffer scheme

Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

lpfc_nvme_prep_io_cmd() checks for null pnode, but caller
lpfc_nvme_fcp_io_submit() has already ensured it's non-null.

Remove the pnode null check.

Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

An hba-wide lock is taken in the nvme io completion routine. The lock
covers null'ing of the nrport pointer in the cmd structure.

The nrport member isn't necessary. After extracting the pointer from the
command, the pointer was dereferenced to get the fc discovery node
pointer. But the fc discovery node pointer is alrady in the command
structure so the dereferrence was unnecessary.

Eliminated the nrport structure member and its use, which also eliminates
the port-wide lock.

Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

Signed-off-by: Himanshu Madhani <hmadhani@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

This patch removes unnecessary code to handle RSCN, instead performs full
scan everytime driver receives RSCN

Fixes: d4f7a16a ("scsi: qla2xxx: Remove ASYNC GIDPN switch command")
Cc: stable@vger.kernel.org #4.19
Signed-off-by: Quinn Tran <qtran@marvell.com>
Signed-off-by: Himanshu Madhani <hmadhani@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

For eh_bus_reset, driver is supposed to reset the link.  Current option to
reset the link is applicable to Loop only. This patch updates current FW
option with the one that is applicable to all topologies.

Signed-off-by: Quinn Tran <qtran@marvell.com>
Signed-off-by: Himanshu Madhani <hmadhani@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

When loop was made down explicitly due to cable pull, then for N2N toplogy,
if FAWWPN BIT is enabled by user, then it would restore some default
(garbage) value for Physical port WWPN, so this show garbage WWPN for the
port. Fix is, to restore physical port WWPN, if it is fabric
configuration. When loop is explicitly made down, and FAWWPN feature is
enabled, then driver need to restore original flashed WWPN.

Signed-off-by: Sawan Chandak <schandak@marvell.com>
Signed-off-by: Himanshu Madhani <hmadhani@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

This patch fixes memory leak by releasing DMA memory in case CT request and
response allocation fails.

Signed-off-by: Quinn Tran <qtran@marvall.com>
Signed-off-by: Himanshu Madhani <hmadhani@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

This patch fixes SRB allocation flag from GFP_KERNEL to GFP_ATOMIC, to
prevent sleeping in IRQ context

Signed-off-by: Giridhar Malavali <gmalavali@marvell.com>
Signed-off-by: Himanshu Madhani <hmadhani@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

This patch flushes del_work and free_work while sending NACK response for
PRLI

Signed-off-by: Quinn Tran <quinn.tran@cavium.com>
Signed-off-by: Himanshu Madhani <hmadhani@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

This patch allocates DMA memory to prevent NULL pointer access for ct_sns
request while sending switch commands.

Signed-off-by: Quinn Tran <quinn.tran@cavium.com>
Signed-off-by: Himanshu Madhani <hmadhani@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

On Transmit respond in target mode, if the chip is already reset or the
session is already deleted, then advance the command to the free step.
There is no need to abort the command, because the chip has already flushed
it.

Signed-off-by: Quinn Tran <quinn.tran@cavium.com>
Signed-off-by: Himanshu Madhani <hmadhani@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>