Merge drm/drm-next into drm-intel-next-queued

Backmerging in order to pull "topic/phy-compliance".

Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>

Merge v5.7-rc1 into drm-misc-fixes

Start the new drm-misc-fixes cycle.

Signed-off-by: Maxime Ripard <maxime@cerno.tech>

Merge tag 'v5.7-rc1' into locking/kcsan, to resolve conflicts and refresh

Resolve these conflicts:

arch/x86/Kconfig
arch/x86/kernel/Makefile

Do a minor "evil merge" to move the KCSAN entry up a

Merge tag 'v5.7-rc1' into locking/kcsan, to resolve conflicts and refresh

Resolve these conflicts:

arch/x86/Kconfig
arch/x86/kernel/Makefile

Do a minor "evil merge" to move the KCSAN entry up a bit by a few lines
in the Kconfig to reduce the probability of future conflicts.

Signed-off-by: Ingo Molnar <mingo@kernel.org>

show more ...

Merge branch 'for-5.7/appleir' into for-linus

- small code cleanups in hid-appleir from Lucas Tanure

Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next

Pull networking updates from David Miller:
"Highlights:

1) Fix the iwlwifi regression, from Johannes Berg.

2) Support BSS

Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next

Pull networking updates from David Miller:
"Highlights:

1) Fix the iwlwifi regression, from Johannes Berg.

2) Support BSS coloring and 802.11 encapsulation offloading in
hardware, from John Crispin.

3) Fix some potential Spectre issues in qtnfmac, from Sergey
Matyukevich.

4) Add TTL decrement action to openvswitch, from Matteo Croce.

5) Allow paralleization through flow_action setup by not taking the
RTNL mutex, from Vlad Buslov.

6) A lot of zero-length array to flexible-array conversions, from
Gustavo A. R. Silva.

7) Align XDP statistics names across several drivers for consistency,
from Lorenzo Bianconi.

8) Add various pieces of infrastructure for offloading conntrack, and
make use of it in mlx5 driver, from Paul Blakey.

9) Allow using listening sockets in BPF sockmap, from Jakub Sitnicki.

10) Lots of parallelization improvements during configuration changes
in mlxsw driver, from Ido Schimmel.

11) Add support to devlink for generic packet traps, which report
packets dropped during ACL processing. And use them in mlxsw
driver. From Jiri Pirko.

12) Support bcmgenet on ACPI, from Jeremy Linton.

13) Make BPF compatible with RT, from Thomas Gleixnet, Alexei
Starovoitov, and your's truly.

14) Support XDP meta-data in virtio_net, from Yuya Kusakabe.

15) Fix sysfs permissions when network devices change namespaces, from
Christian Brauner.

16) Add a flags element to ethtool_ops so that drivers can more simply
indicate which coalescing parameters they actually support, and
therefore the generic layer can validate the user's ethtool
request. Use this in all drivers, from Jakub Kicinski.

17) Offload FIFO qdisc in mlxsw, from Petr Machata.

18) Support UDP sockets in sockmap, from Lorenz Bauer.

19) Fix stretch ACK bugs in several TCP congestion control modules,
from Pengcheng Yang.

20) Support virtual functiosn in octeontx2 driver, from Tomasz
Duszynski.

21) Add region operations for devlink and use it in ice driver to dump
NVM contents, from Jacob Keller.

22) Add support for hw offload of MACSEC, from Antoine Tenart.

23) Add support for BPF programs that can be attached to LSM hooks,
from KP Singh.

24) Support for multiple paths, path managers, and counters in MPTCP.
From Peter Krystad, Paolo Abeni, Florian Westphal, Davide Caratti,
and others.

25) More progress on adding the netlink interface to ethtool, from
Michal Kubecek"

* git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (2121 commits)
net: ipv6: rpl_iptunnel: Fix potential memory leak in rpl_do_srh_inline
cxgb4/chcr: nic-tls stats in ethtool
net: dsa: fix oops while probing Marvell DSA switches
net/bpfilter: remove superfluous testing message
net: macb: Fix handling of fixed-link node
net: dsa: ksz: Select KSZ protocol tag
netdevsim: dev: Fix memory leak in nsim_dev_take_snapshot_write
net: stmmac: add EHL 2.5Gbps PCI info and PCI ID
net: stmmac: add EHL PSE0 & PSE1 1Gbps PCI info and PCI ID
net: stmmac: create dwmac-intel.c to contain all Intel platform
net: dsa: bcm_sf2: Support specifying VLAN tag egress rule
net: dsa: bcm_sf2: Add support for matching VLAN TCI
net: dsa: bcm_sf2: Move writing of CFP_DATA(5) into slicing functions
net: dsa: bcm_sf2: Check earlier for FLOW_EXT and FLOW_MAC_EXT
net: dsa: bcm_sf2: Disable learning for ASP port
net: dsa: b53: Deny enslaving port 7 for 7278 into a bridge
net: dsa: b53: Prevent tagged VLAN on port 7 for 7278
net: dsa: b53: Restore VLAN entries upon (re)configuration
net: dsa: bcm_sf2: Fix overflow checks
hv_netvsc: Remove unnecessary round_up for recv_completion_cnt
...

show more ...

Merge branch 'net-sched-expose-HW-stats-types-per-action-used-by-drivers'

Jiri Pirko says:

====================
net: sched: expose HW stats types per action used by drivers

The first patch is just

Merge branch 'net-sched-expose-HW-stats-types-per-action-used-by-drivers'

Jiri Pirko says:

====================
net: sched: expose HW stats types per action used by drivers

The first patch is just adding a helper used by the second patch too.
The second patch is exposing HW stats types that are used by drivers.

Example:

$ tc filter add dev enp3s0np1 ingress proto ip handle 1 pref 1 flower dst_ip 192.168.1.1 action drop
$ tc -s filter show dev enp3s0np1 ingress
filter protocol ip pref 1 flower chain 0
filter protocol ip pref 1 flower chain 0 handle 0x1
eth_type ipv4
dst_ip 192.168.1.1
in_hw in_hw_count 2
action order 1: gact action drop
random type none pass val 0
index 1 ref 1 bind 1 installed 10 sec used 10 sec
Action statistics:
Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0)
backlog 0b 0p requeues 0
used_hw_stats immediate <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

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net: sched: expose HW stats types per action used by drivers

It may be up to the driver (in case ANY HW stats is passed) to select
which type of HW stats he is going to use. Add an infrastructure to

net: sched: expose HW stats types per action used by drivers

It may be up to the driver (in case ANY HW stats is passed) to select
which type of HW stats he is going to use. Add an infrastructure to
expose this information to user.

$ tc filter add dev enp3s0np1 ingress proto ip handle 1 pref 1 flower dst_ip 192.168.1.1 action drop
$ tc -s filter show dev enp3s0np1 ingress
filter protocol ip pref 1 flower chain 0
filter protocol ip pref 1 flower chain 0 handle 0x1
eth_type ipv4
dst_ip 192.168.1.1
in_hw in_hw_count 2
action order 1: gact action drop
random type none pass val 0
index 1 ref 1 bind 1 installed 10 sec used 10 sec
Action statistics:
Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0)
backlog 0b 0p requeues 0
used_hw_stats immediate <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<

Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Merge branch 'cls_flower-Use-extack-in-fl_set_key'

Guillaume Nault says:

====================
cls_flower: Use extack in fl_set_key()

Add missing extack messages in fl_set_key(), so that users can

Merge branch 'cls_flower-Use-extack-in-fl_set_key'

Guillaume Nault says:

====================
cls_flower: Use extack in fl_set_key()

Add missing extack messages in fl_set_key(), so that users can get more
meaningfull error messages when netlink attributes are rejected.

Patch 1 also extends extack in tcf_change_indev() (in pkt_cls.h) since
this function is used by fl_set_key().
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

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net: sched: refine extack messages in tcf_change_indev

Add an error message when device wasn't found.
While there, also set the bad attribute's offset in extack.

Signed-off-by: Guillaume Nault <gna

net: sched: refine extack messages in tcf_change_indev

Add an error message when device wasn't found.
While there, also set the bad attribute's offset in extack.

Signed-off-by: Guillaume Nault <gnault@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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Merge branch 'x86/kdump' into locking/kcsan, to resolve conflicts

Conflicts:
arch/x86/purgatory/Makefile

Signed-off-by: Ingo Molnar <mingo@kernel.org>

Merge branch 'RED-Introduce-an-ECN-tail-dropping-mode'

Petr Machata says:

====================
RED: Introduce an ECN tail-dropping mode

When the RED qdisc is currently configured to enable ECN, th

Merge branch 'RED-Introduce-an-ECN-tail-dropping-mode'

Petr Machata says:

====================
RED: Introduce an ECN tail-dropping mode

When the RED qdisc is currently configured to enable ECN, the RED algorithm
is used to decide whether a certain SKB should be marked. If that SKB is
not ECN-capable, it is early-dropped.

It is also possible to keep all traffic in the queue, and just mark the
ECN-capable subset of it, as appropriate under the RED algorithm. Some
switches support this mode, and some installations make use of it.
There is currently no way to put the RED qdiscs to this mode.

Therefore this patchset adds a new RED flag, TC_RED_TAILDROP. When the
qdisc is configured with this flag, non-ECT traffic is enqueued (and
tail-dropped when the queue size is exhausted) instead of being
early-dropped.

Unfortunately, adding a new RED flag is not as simple as it sounds. RED
flags are passed in tc_red_qopt.flags. However RED neglects to validate the
flag field, and just copies it over wholesale to its internal structure,
and later dumps it back.

A broken userspace can therefore configure a RED qdisc with arbitrary
unsupported flags, and later expect to see the flags on qdisc dump. The
current ABI thus allows storage of 5 bits of custom data along with the
qdisc instance.

GRED, SFQ and CHOKE qdiscs are in the same situation. (GRED validates VQ
flags, but not the flags for the main queue.) E.g. if SFQ ever needs to
support TC_RED_ADAPTATIVE, it needs another way of doing it, and at the
same time it needs to retain the possibility to store 6 bits of
uninterpreted data.

For RED, this problem is resolved in patch #2, which adds a new attribute,
and a way to separate flags from userbits that can be reused by other
qdiscs. The flag itself and related behavioral changes are added in patch

To test the new feature, patch #1 first introduces a TDC testsuite that
covers the existing RED flags. Patch #5 later extends it with taildrop
coverage. Patch #6 contains a forwarding selftest for the offloaded
datapath.

To test the SW datapath, I took the mlxsw selftest and adapted it in mostly
obvious ways. The test is stable enough to verify that RED, ECN and ECN
taildrop actually work. However, I have no confidence in its portability to
other people's machines or mildly different configurations. I therefore do
not find it suitable for upstreaming.

GRED and CHOKE can use the same method as RED if they ever need to support
extra flags. SFQ uses the length of TCA_OPTIONS to dispatch on binary
control structure version, and would therefore need a different approach.

v2:
- Patch #1
- Require nsPlugin in each RED test
- Match end-of-line to catch cases of more flags reported than
requested
- Patch #2:
- Replaced with another patch.
- Patch #3:
- Fix red_use_taildrop() condition in red_enqueue switch for
probabilistic case.
- Patch #5:
- Require nsPlugin in each RED test
- Match end-of-line to catch cases of more flags reported than
requested
- Add a test for creation of non-ECN taildrop, which should fail
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

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net: sched: RED: Introduce an ECN nodrop mode

When the RED Qdisc is currently configured to enable ECN, the RED algorithm
is used to decide whether a certain SKB should be marked. If that SKB is
not

net: sched: RED: Introduce an ECN nodrop mode

When the RED Qdisc is currently configured to enable ECN, the RED algorithm
is used to decide whether a certain SKB should be marked. If that SKB is
not ECN-capable, it is early-dropped.

It is also possible to keep all traffic in the queue, and just mark the
ECN-capable subset of it, as appropriate under the RED algorithm. Some
switches support this mode, and some installations make use of it.

To that end, add a new RED flag, TC_RED_NODROP. When the Qdisc is
configured with this flag, non-ECT traffic is enqueued instead of being
early-dropped.

Signed-off-by: Petr Machata <petrm@mellanox.com>
Reviewed-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

show more ...

Merge branch 'ct-offload' of git://git.kernel.org/pub/scm/linux/kernel/git/saeed/linux

Merge branch 'mlxsw-Offload-FIFO'

Ido Schimmel says:

====================
mlxsw: Offload FIFO

Petr says:

If an ETS or PRIO band contains an offloaded qdisc, it is possible to
obtain offloaded cou

Merge branch 'mlxsw-Offload-FIFO'

Ido Schimmel says:

====================
mlxsw: Offload FIFO

Petr says:

If an ETS or PRIO band contains an offloaded qdisc, it is possible to
obtain offloaded counters for that band. However, some of the bands will
likely simply contain the default invisible FIFO qdisc, which does not
present the counters.

To remedy this situation, make FIFO offloadable, and offload it by mlxsw
when below PRIO and ETS for the sole purpose of providing counters for the
bands that do not include other qdiscs.

- In patch #1, FIFO is extended to support offloading.
- Patches #2 and #3 restructure bits of mlxsw to facilitate
the offload logic.
- Patch #4 then implements the offload itself.
- Patch #5 changes the ETS selftest to use the new counters.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

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net: sched: Make FIFO Qdisc offloadable

Invoke ndo_setup_tc() as appropriate to signal init / replacement,
destroying and dumping of pFIFO / bFIFO Qdisc.

A lot of the FIFO logic is used for pFIFO_h

net: sched: Make FIFO Qdisc offloadable

Invoke ndo_setup_tc() as appropriate to signal init / replacement,
destroying and dumping of pFIFO / bFIFO Qdisc.

A lot of the FIFO logic is used for pFIFO_head_drop as well, but that's a
semantically very different Qdisc that isn't really in the same boat as
pFIFO / bFIFO. Split some of the functions to keep the Qdisc intact.

Signed-off-by: Petr Machata <petrm@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

show more ...

Merge drm/drm-next into drm-intel-next-queued

Some DSI and VBT pending patches from Hans will apply
cleanly and with less ugly conflicts if they are rebuilt
on top of other patches that recently lan

Merge drm/drm-next into drm-intel-next-queued

Some DSI and VBT pending patches from Hans will apply
cleanly and with less ugly conflicts if they are rebuilt
on top of other patches that recently landed on drm-next.

Reference: https://patchwork.freedesktop.org/series/70952/
Cc: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com

show more ...

Merge tag 'v5.6-rc3' into sched/core, to pick up fixes and dependent patches

Signed-off-by: Ingo Molnar <mingo@kernel.org>

net: sched: Pass ingress block to tcf_classify_ingress

On ingress and cls_act qdiscs init, save the block on ingress
mini_Qdisc and and pass it on to ingress classification, so it
can be used for th

net: sched: Pass ingress block to tcf_classify_ingress

On ingress and cls_act qdiscs init, save the block on ingress
mini_Qdisc and and pass it on to ingress classification, so it
can be used for the looking up a specified chain index.

Co-developed-by: Vlad Buslov <vladbu@mellanox.com>
Signed-off-by: Vlad Buslov <vladbu@mellanox.com>
Signed-off-by: Paul Blakey <paulb@mellanox.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

show more ...

net: sched: Introduce ingress classification function

TC multi chain configuration can cause offloaded tc chains to miss in
hardware after jumping to some chain. In such cases the software should
co

net: sched: Introduce ingress classification function

TC multi chain configuration can cause offloaded tc chains to miss in
hardware after jumping to some chain. In such cases the software should
continue from the chain that missed in hardware, as the hardware may
have manipulated the packet and updated some counters.

Currently a single tcf classification function serves both ingress and
egress. However, multi chain miss processing (get tc skb extension on
hw miss, set tc skb extension on tc miss) should happen only on
ingress.

Refactor the code to use ingress classification function, and move setting
the tc skb extension from general classification to it, as a prestep
for supporting the hw miss scenario.

Co-developed-by: Vlad Buslov <vladbu@mellanox.com>
Signed-off-by: Vlad Buslov <vladbu@mellanox.com>
Signed-off-by: Paul Blakey <paulb@mellanox.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

show more ...

Merge v5.6-rc2 into drm-misc-next

Lyude needs some patches in 5.6-rc2 and we didn't bring drm-misc-next
forward yet, so it looks like a good occasion.

Signed-off-by: Maxime Ripard <maxime@cerno.tec

Merge v5.6-rc2 into drm-misc-next

Lyude needs some patches in 5.6-rc2 and we didn't bring drm-misc-next
forward yet, so it looks like a good occasion.

Signed-off-by: Maxime Ripard <maxime@cerno.tech>

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Merge v5.6-rc1 into drm-misc-fixes

We're based on v5.6, need v5.6-rc1 at least. :)

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>

Merge branch 'Remove-rtnl-lock-dependency-from-flow_action-infra'

Vlad Buslov says:

====================
Remove rtnl lock dependency from flow_action infra

Currently, TC flow_action infrastructure

Merge branch 'Remove-rtnl-lock-dependency-from-flow_action-infra'

Vlad Buslov says:

====================
Remove rtnl lock dependency from flow_action infra

Currently, TC flow_action infrastructure code obtain rtnl lock before
accessing action state in tc_setup_flow_action() function and releases
it afterwards. This behavior is not supposed to impact TC filter
insertion rate because filling flow_action representation is only a
small part of creating new filter and expensive operations (hardware
offload callbacks, classifiers, cls API code that creates chains and
classifiers instances) already support unlocked execution. However,
typical vswitch implementation might need to also dump TC filters
concurrently, for example to age out unused flows or update flow
counters. TC dump is fully serialized and holds rtnl lock during its
whole execution in kernel space. As such, it can significantly impact
concurrent tasks that try to intermittently obtain rtnl lock when
filling intermediate representation for new filter offload (performance
evaluation at the end of this mail).

Refactor flow_action cls API infrastructure and its dependencies to not
rely on rtnl lock for synchronization. Patch set overview:

- Refactor tc_setup_flow_action() to obtain action tcf_lock when
accessing action state. Fix its dependencies to not obtain tcf_lock
themselves and assume that caller already holds it (needs to be done
in same patch to prevent deadlock) and not to call sleeping functions
(needs to be done in same patch to prevent "sleeping while atomic"
dmesg warnings).

- Refactor action helper functions to require tcf_lock instead of rtnl.
Internally, all of the actions already use tcf_lock for
synchronization to accommodate unlocked classifier API, so this change
relies on already existing functionality.

- Remove rtnl lock and "rtnl_held" argument from tc_setup_flow_action()
function.

To test the change, multiple concurrent TC instances are invoked with
following command:

time ls add* | xargs -n 1 -P 100 sudo tc -b

Ten batch files with following typical rules (100k each) are used:

filter add dev ens1f0_0 protocol ip ingress prio 1 handle 1 flower
src_mac e4:11:0:0:0:0 dst_mac e4:12:0:0:0:0 src_ip 192.168.111.1
dst_ip 192.168.111.2 ip_proto udp dst_port 1 src_port 1 action
tunnel_key set id 1 src_ip 2.2.2.2 dst_ip 2.2.2.3 dst_port 4789
no_percpu action mirred egress redirect dev vxlan1 no_percpu

TC dump of same device is called in infinite loop from five concurrent
instances:

while true do tc -s filter show dev $NIC ingress >/dev/null done

Results obtained on current net-next commit 9f68e3655aae ("Merge tag
'drm-next-2020-01-30' of git://anongit.freedesktop.org/drm/drm"):

| net-next | this change
---------------+----------+-------------
TC add | 6.3s | 6.3s
TC add + dump | 29.3s | 6.8s

Test results confirm significant impact of concurrent TC dump. The
impact is almost fully mitigated by proposed change (differences can be
attributed to contention for chain and tp locks between add and dump TC
instances).
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

show more ...

net: sched: don't take rtnl lock during flow_action setup

Refactor tc_setup_flow_action() function not to use rtnl lock and remove
'rtnl_held' argument that is no longer needed.

Signed-off-by: Vlad

net: sched: don't take rtnl lock during flow_action setup

Refactor tc_setup_flow_action() function not to use rtnl lock and remove
'rtnl_held' argument that is no longer needed.

Signed-off-by: Vlad Buslov <vladbu@mellanox.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

show more ...

Merge branch 'linus' into perf/urgent, to synchronize with upstream

Signed-off-by: Ingo Molnar <mingo@kernel.org>

Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next

Pull networking updates from David Miller:

1) Add WireGuard

2) Add HE and TWT support to ath11k driver, from John Crispin.

3

Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next

Pull networking updates from David Miller:

1) Add WireGuard

2) Add HE and TWT support to ath11k driver, from John Crispin.

3) Add ESP in TCP encapsulation support, from Sabrina Dubroca.

4) Add variable window congestion control to TIPC, from Jon Maloy.

5) Add BCM84881 PHY driver, from Russell King.

6) Start adding netlink support for ethtool operations, from Michal
Kubecek.

7) Add XDP drop and TX action support to ena driver, from Sameeh
Jubran.

8) Add new ipv4 route notifications so that mlxsw driver does not have
to handle identical routes itself. From Ido Schimmel.

9) Add BPF dynamic program extensions, from Alexei Starovoitov.

10) Support RX and TX timestamping in igc, from Vinicius Costa Gomes.

11) Add support for macsec HW offloading, from Antoine Tenart.

12) Add initial support for MPTCP protocol, from Christoph Paasch,
Matthieu Baerts, Florian Westphal, Peter Krystad, and many others.

13) Add Octeontx2 PF support, from Sunil Goutham, Geetha sowjanya, Linu
Cherian, and others.

* git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1469 commits)
net: phy: add default ARCH_BCM_IPROC for MDIO_BCM_IPROC
udp: segment looped gso packets correctly
netem: change mailing list
qed: FW 8.42.2.0 debug features
qed: rt init valid initialization changed
qed: Debug feature: ilt and mdump
qed: FW 8.42.2.0 Add fw overlay feature
qed: FW 8.42.2.0 HSI changes
qed: FW 8.42.2.0 iscsi/fcoe changes
qed: Add abstraction for different hsi values per chip
qed: FW 8.42.2.0 Additional ll2 type
qed: Use dmae to write to widebus registers in fw_funcs
qed: FW 8.42.2.0 Parser offsets modified
qed: FW 8.42.2.0 Queue Manager changes
qed: FW 8.42.2.0 Expose new registers and change windows
qed: FW 8.42.2.0 Internal ram offsets modifications
MAINTAINERS: Add entry for Marvell OcteonTX2 Physical Function driver
Documentation: net: octeontx2: Add RVU HW and drivers overview
octeontx2-pf: ethtool RSS config support
octeontx2-pf: Add basic ethtool support
...

show more ...