Fixes gcc '-Wunused-but-set-variable' warning:

drivers/net/ethernet/marvell/octeontx2/af/cgx.c: In function 'cgx_fwi_event_handler':
drivers/net/ethernet/marvell/octeontx2/af/cgx.c:257:17: warning:
 variable 'dev' set but not used [-Wunused-but-set-variable]

It never be used since introduction in
commit 1463f382 ("octeontx2-af: Add support for CGX link management")
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

This patch adds support for the NETIF_F_RXFCS feature in the Mscc
Ethernet driver. This feature is disabled by default and allow a user
to request the driver not to drop the FCS and to extract it into the skb
for debugging purposes.
Signed-off-by: Antoine Tenart <antoine.tenart@bootlin.com>
Reviewed-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Salil Mehta says:

====================
Adds support of RSS to HNS3 Driver for Rev 2(=0x21) H/W

This patch-set mainly adds new additions related to RSS for the new
hardware Revision 0x21. It also adds support to use RSS hash value
provided by the hardware along with descriptor.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

Drivers should call skb_set_hash to set the hash and its type
in an skbuff.
Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: Salil Mehta <salil.mehta@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

This patch adds RSS tuple support for VF in revision
0x21.
Signed-off-by: Jian Shen <shenjian15@huawei.com>
Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: Salil Mehta <salil.mehta@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

This patch adds RSS key, hash algorithm configuration support
for VF in revision 0x21.
Signed-off-by: Jian Shen <shenjian15@huawei.com>
Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: Salil Mehta <salil.mehta@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

This patch adds ETH_RSS_HASH_XOR hash algorithm supports, which
is supported by hw revision 0x21.
Signed-off-by: Jian Shen <shenjian15@huawei.com>
Signed-off-by: Peng Li <lipeng321@huawei.com>
Signed-off-by: Salil Mehta <salil.mehta@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

In case of error, the function syscon_node_to_regmap() returns ERR_PTR()
and never returns NULL. The NULL test in the return value check should
be replaced with IS_ERR().

Fixes: 51f6b410 ("phy: add driver for Microsemi Ocelot SerDes muxing")
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Reviewed-by: Quentin Schulz <quentin.schulz@bootlin.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Florian Fainelli says:

====================
net: dsa: bcm_sf2: Couple of fixes

Here are two fixes for the bcm_sf2 driver that were found during testing
unbind and analysing another issue during system suspend/resume.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

There is no reason to open code what the switch setup function does, in
fact, because we just issued a switch reset, we would make all the
register get their default values, including for instance, having unused
port be enabled again and wasting power and leading to an inappropriate
switch core clock being selected.

Fixes: 8cfa9498 ("net: dsa: bcm_sf2: add suspend/resume callbacks")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

The order in which we release resources is unfortunately leading to bus
errors while dismantling the port. This is because we set
priv->wol_ports_mask to 0 to tell bcm_sf2_sw_suspend() that it is now
permissible to clock gate the switch. Later on, when dsa_slave_destroy()
comes in from dsa_unregister_switch() and calls
dsa_switch_ops::port_disable, we perform the same dismantling again, and
this time we hit registers that are clock gated.

Make sure that dsa_unregister_switch() is the first thing that happens,
which takes care of releasing all user visible resources, then proceed
with clock gating hardware. We still need to set priv->wol_ports_mask to
0 to make sure that an enabled port properly gets disabled in case it
was previously used as part of Wake-on-LAN.

Fixes: d9338023 ("net: dsa: bcm_sf2: Make it a real platform device driver")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

While noop_qdisc.gso_skb and noop_qdisc.skb_bad_txq are not used
in other places, it seems not correct to overwrite their fields
in dev_init_scheduler_queue().

noop_qdisc is essentially a shared and read-only object, even if
it is not marked as const because of some implementation detail.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Without CONFIG_INET enabled compiles fail with:

net/mpls/af_mpls.o: In function `mpls_dump_routes':
af_mpls.c:(.text+0xed0): undefined reference to `ip_valid_fib_dump_req'

The preference is for MPLS to use the same handler as ipv4 and ipv6
to allow consistency when doing a dump for AF_UNSPEC which walks
all address families invoking the route dump handler. If INET is
disabled then fallback to an MPLS version which can be tighter on
the data checks.

Fixes: e8ba330a ("rtnetlink: Update fib dumps for strict data checking")
Reported-by: Randy Dunlap <rdunlap@infradead.org>
Reported-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Christoph Hellwig says:

====================
fore200e DMA cleanups and fixes

The fore200e driver came up during some dma-related audits, so
here is the fallout.  Compile tested (x86 & sparc) only.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

The driver was lacking any handling for failures from the DMA mapping
routines.  With an iommu or swiotlb this can be fatal.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

The driver properly uses the DMA mapping API, so it should not
pointlessly dip into the GFP_DMA pool, which is only 16MB on x86.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

There is no need for an indirection before calling the dma alloc
routines now that we store a struct device in struct fore200e.

Also remove the pointless GFP_ATOMIC for the sbus case, and fix the
up the error handling by removing the 0 dma_addr test - some iommus
can return 0 as a perfectly valid bus address.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

There is no need for an indirection before calling the dma mapping
routines now that we store a struct device in struct fore200e.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

There is no need for this field, as the only user of it can just use
the local size variable instead.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

This can be used much better than the untyped void pointer containing
either a PCI or platform device.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

There is no need to have a global array of the ops, instead PCI and sbus
can have their own instances assigned in *_probe.  Also switch to C99
initializers.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

Because the function __skb_get_hash_symmetric always returns non-zero.
Signed-off-by: Zhang Yu <zhangyu31@baidu.com>
Signed-off-by: Wang Li <wangli39@baidu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Implement ethtool .set_coalesce (-C) and .get_coalesce (-c) handlers.
Interrupt moderation is currently not supported, so these accept and
display the default settings of 0 usec and 1 frame.

Toggle tx napi through setting tx-frames. So as to not interfere
with possible future interrupt moderation, value 1 means tx napi while
value 0 means not.

Only allow the switching when device is down for simplicity.

Link: https://patchwork.ozlabs.org/patch/948149/Suggested-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Jakub Kicinski says:

====================
nfp: flower: speed up stats update loop

This set from Pieter improves performance of processing FW stats
update notifications.  The FW seems to send those at relatively
high rate (roughly ten per second per flow), therefore if we want
to approach the million flows mark we have to be very careful
about our data structures.

We tried rhashtable for stat updates, but according to our experiments
rhashtable lookup on a u32 takes roughly 60ns on an Xeon E5-2670 v3.
Which translate to a hard limit of 16M lookups per second on this CPU,
and, according to perf record jhash and memcmp account for 60% of CPU
usage on the core handling the updates.

Given that our statistic IDs are already array indices, and considering
each statistic is only 24B in size, we decided to forego the use
of hashtables and use a directly indexed array.  The CPU savings are
considerable.

With the recent improvements in TC core and with our own bottlenecks
out of the way Pieter removes the artificial limit of 128 flows, and
allows the driver to install as many flows as FW supports.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

Read the host context count symbols provided by firmware and use
it to determine the number of allocated stats ids. Previously it
won't be possible to offload more than 2^17 filter even if FW was
able to do so.
Signed-off-by: Pieter Jansen van Vuuren <pieter.jansenvanvuuren@netronome.com>
Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Make use of an array stats instead of storing stats per flow which
would require a hash lookup at critical times.
Signed-off-by: Pieter Jansen van Vuuren <pieter.jansenvanvuuren@netronome.com>
Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Make use of relativistic hash tables for tracking flows instead
of fixed sized hash tables.
Signed-off-by: Pieter Jansen van Vuuren <pieter.jansenvanvuuren@netronome.com>
Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Clang warns when multiple sets of parentheses are used for a single
conditional statement.

drivers/isdn/hisax/amd7930_fn.c:628:32: warning: equality comparison
with extraneous parentheses [-Wparentheses-equality]
                if ((cs->dc.amd7930.ph_state == 8)) {
                     ~~~~~~~~~~~~~~~~~~~~~~~~^~~~
drivers/isdn/hisax/amd7930_fn.c:628:32: note: remove extraneous
parentheses around the comparison to silence this warning
                if ((cs->dc.amd7930.ph_state == 8)) {
                    ~                        ^   ~
drivers/isdn/hisax/amd7930_fn.c:628:32: note: use '=' to turn this
equality comparison into an assignment
                if ((cs->dc.amd7930.ph_state == 8)) {
                                             ^~
                                             =
1 warning generated.
Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

DCTCP has two parts - a new ECN signalling mechanism and the response
function to it. The first part can be used by other congestion
control for DCTCP-ECN deployed networks. This patch moves that part
into a separate tcp_dctcp.h to be used by other congestion control
module (like how Yeah uses Vegas algorithmas). For example, BBR is
experimenting such ECN signal currently
https://tinyurl.com/ietf-102-iccrg-bbr2Signed-off-by: Yuchung Cheng <ycheng@google.com>
Signed-off-by: Yousuk Seung <ysseung@google.com>
Signed-off-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

ipv6_route_table_template is exported but there are no users outside
of route.c. Make it static.
Signed-off-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

The NLM_F_DUMP_PROPER_HDR netlink flag was replaced by a setsockopt.
Update the comment in rtnl_stats_dump.

Fixes: 841891ec ("rtnetlink: Update rtnl_stats_dump for strict data checking")
Reported-by: Christian Brauner <christian@brauner.io>
Signed-off-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Move setting of local variable ifm to after the message parsing in
valid_fdb_dump_legacy. Avoid potential future use of unchecked variable.

Fixes: 8dfbda19 ("rtnetlink: Move input checking for rtnl_fdb_dump to helper")
Reported-by: Christian Brauner <christian@brauner.io>
Signed-off-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Ido Schimmel says:

====================
mlxsw: selftests: Few small updates

First patch fixes a typo in mlxsw.

Second patch fixes a race in a recent test.

Third patch makes a recent test executable.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

This is a self-standing test and as such should be itself executable.

Fixes: b5638d46 ("selftests: mlxsw: Add a test for UC behavior under MC flood")
Signed-off-by: Petr Machata <petrm@mellanox.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Immediately after mlxsw module is probed and lldpad started, added APP
entries are briefly in "unknown" state before becoming "pending". That's
the state that lldpad_app_wait_set() typically sees, and since there are
no pending entries at that time, it bails out. However the entries have
not been pushed to the kernel yet at that point, and thus the test case
fails.

Fix by waiting for both unknown and pending entries to disappear before
proceeding.

Fixes: d159261f ("selftests: mlxsw: Add test for trust-DSCP")
Signed-off-by: Petr Machata <petrm@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Signed-off-by: Nir Dotan <nird@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

There are several variables being initialized that are being set later
and hence the initialization is redundant and can be removed. Remove
then.
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Sunil Goutham says:

====================
octeontx2-af: Add RVU Admin Function driver

Resource virtualization unit (RVU) on Marvell's OcteonTX2 SOC maps HW
resources from the network, crypto and other functional blocks into
PCI-compatible physical and virtual functions. Each functional block
again has multiple local functions (LFs) for provisioning to PCI devices.
RVU supports multiple PCIe SRIOV physical functions (PFs) and virtual
functions (VFs). PF0 is called the administrative / admin function (AF)
and has privileges to provision RVU functional block's LFs to each of the
PF/VF.

RVU managed networking functional blocks
 - Network pool allocator (NPA)
 - Network interface controller (NIX)
 - Network parser CAM (NPC)
 - Schedule/Synchronize/Order unit (SSO)

RVU managed non-networking functional blocks
 - Crypto accelerator (CPT)
 - Scheduled timers unit (TIM)
 - Schedule/Synchronize/Order unit (SSO)
   Used for both networking and non networking usecases
 - Compression (upcoming in future variants of the silicons)

Resource provisioning examples
 - A PF/VF with NIX-LF & NPA-LF resources works as a pure network device
 - A PF/VF with CPT-LF resource works as a pure cyrpto offload device.

This admin function driver neither receives any data nor processes it i.e
no I/O, a configuration only driver.

PF/VFs communicates with AF via a shared memory region (mailbox). Upon
receiving requests from PF/VF, AF does resource provisioning and other
HW configuration. AF is always attached to host, but PF/VFs may be used
by host kernel itself, or attached to VMs or to userspace applications
like DPDK etc. So AF has to handle provisioning/configuration requests
sent by any device from any domain.

This patch series adds logic for the following
 - RVU AF driver with functional blocks provisioning support.
 - Mailbox infrastructure for communication between AF and PFs.
 - CGX (MAC controller) driver which communicates with firmware for
   managing  physical ethernet interfaces. AF collects info from this
   driver and forwards the same to the PF/VFs uaing these interfaces.

This is the first set of patches out of 80+ patches.

Changes from v8:
 1 Removed unnecessary typecasts in entire series
   - Suggested by David Miller
 2 Added COMPILE_TEST to AF driver
   - Suggested by Arnd Bergmann
 3 Changed udelay() to usleep_range() in rvu_poll_reg
   - Suggested by Arnd Bergmann
 4 MSIX vector base IOMMU mapping is done using dma_map_resource()
   API instead of dma_map_single() as it accepts physical address.
   - Issue pointed by Arnd Bergmann

Changes from v7:
 1 Removed unnecessary typecasts in mbox infra code.
   - Suggested by David Miller
 2 Fixed MAINTAINERS patch
   - Suggested by Joe Perches

Changes from v6:
 Fixed ordering of local variables from longest to shortest line.
   - Suggested by David Miller

Changes from v5:
 Modified bitfield based command structures to bitmasks for communication
 with firmware, to address endianness issues.
   - Suggested by Arnd Bergmann

Changes from v4:
 1 Removed module author/version/description from CGX driver as it's now
   merged with AF driver module.
   - Suggested by Arnd Bergmann
 2 Added big-endian bitfields for CGX's kernel <=> firmware communication
   command structures.
   - Suggested by Arnd Bergmann

Changes from v3:
 Moved driver from drivers/soc to drivers/net/ethernet
   - Suggested by Arnd Bergmann
 https://patchwork.kernel.org/cover/10587635/

Changes from v2:
 No changes, submitted again with netdev mailing list in loop.
   - Suggested by Arnd Bergmann and Andrew Lunn

Changes from v1:
 1 Merged RVU admin function and CGX drivers into a single module
   - Suggested by Arnd Bergmann
 2 Pulled mbox communication APIs into a separate module to remove
   admin function driver dependency in a VM where AF is not attached.
   - Suggested by Arnd Bergmann
====================
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

Added maintainers entry for Marvell OcteonTX2 SOC's RVU
admin function driver.
Signed-off-by: Sunil Goutham <sgoutham@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Added support in RVU AF driver to register for
CGX LMAC link status change events from firmware
and managing them. Processing part will be added
in followup patches.

- Introduced eventqueue for posting events from cgx lmac.
  Queueing mechanism will ensure that events can be posted
  and firmware can be acked immediately and hence event
  reception and processing are decoupled.
- Events gets added to the queue by notification callback.
  Notification callback is expected to be atomic, since it
  is called from interrupt context.
- Events are dequeued and processed in a worker thread.
Signed-off-by: Linu Cherian <lcherian@marvell.com>
Signed-off-by: Sunil Goutham <sgoutham@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>