it is sometimes necessary to poll a phy register by phy_read_mmd()
function until its value satisfies some condition. introduce
phy_read_mmd_poll_timeout() macros that do this.
Suggested-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Dejin Zheng <zhengdejin5@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

redefined readx_poll_timeout macro by read_poll_timeout to
simplify the code.
Signed-off-by: Dejin Zheng <zhengdejin5@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

this macro is an extension of readx_poll_timeout macro. the accessor
function op just supports only one parameter in the readx_poll_timeout
macro, but this macro can supports multiple variable parameters for
it. so functions like phy_read(struct phy_device *phydev, u32 regnum)
and phy_read_mmd(struct phy_device *phydev, int devad, u32 regnum) can
also use this poll timeout core. and also expand it can sleep some time
before read operation.
Signed-off-by: Dejin Zheng <zhengdejin5@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Previous changes to the IP routing code have removed all the
tests for the DS_HOST route flag.
Remove the flags and all the code that sets it.
Signed-off-by: David Laight <david.laight@aculab.com>
Acked-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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

drivers/net/ethernet/cavium/thunder/nicvf_queues.c: In function nicvf_sq_free_used_descs:
drivers/net/ethernet/cavium/thunder/nicvf_queues.c:1182:12: warning:
 variable tail set but not used [-Wunused-but-set-variable]

It's not used since commit 4863dea3("net: Adding support for Cavium ThunderX network controller"),
so remove it.
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Zheng zengkai <zhengzengkai@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Provide a flow_dissect callback which returns the network offset and
where to find the skb protocol, given the tags structure a common
function works for both tagging formats that are supported.
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Reviewed-by: Vivien Didelot <vivien.didelot@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Ido Schimmel says:

====================
devlink: Preparations for trap policers support

This patch set prepares the code for devlink-trap policer support in a
follow-up patch set [1][2]. No functional changes intended.

Policers are going to be added as attributes of packet trap groups,
which are entities used to aggregate logically related packet traps.
This will allow users, for example, to limit all the packets that
encountered an exception during routing to 10Kpps.

However, currently, device drivers register their packet trap groups
implicitly when they register their packet traps via
devlink_traps_register(). This makes it difficult to pass additional
attributes for the groups. For example, the policer bound to the group.

Therefore, this patch set converts device drivers to explicitly register
their packet trap groups. This will later allow these drivers to
register the group with additional attributes, if any.
====================
Acked-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

Packet trap groups are now explicitly registered by drivers and not
implicitly registered when the packet traps are registered. Therefore,
there is no need to encode entire group structure the trap is associated
with inside the trap structure.

Instead, only pass the group identifier. Refer to it as initial group
identifier, as future patches will allow user space to move traps
between groups.
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Now that drivers explicitly register their supported packet trap groups
there is no for devlink to create them on-demand and destroy them when
their reference count reaches zero.
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Use the previously added API to explicitly register / unregister
supported packet trap groups. This is in preparation for future patches
that will enable drivers to pass additional group attributes, such as
associated policer identifier.
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Use the previously added API to explicitly register / unregister
supported packet trap groups. This is in preparation for future patches
that will enable drivers to pass additional group attributes, such as
associated policer identifier.
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Currently, packet trap groups are implicitly registered by drivers upon
packet trap registration. When the traps are registered, each is
associated with a group and the group is created by devlink, if it does
not exist already.

This makes it difficult for drivers to pass additional attributes for
the groups.

Therefore, as a preparation for future patches that require passing
additional group attributes, add an API to explicitly register /
unregister these groups.

Next patches will convert existing drivers to use this API.
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Heiner Kallweit says:

====================
r8169: improvements for scheduled task handling

This series includes some improvements for handling of scheduled tasks.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

So far only the reset bit it set, but the handler executing the reset
is not scheduled. Therefore nothing will happen until some other action
schedules the handler. Improve this by ensuring that the handler is
scheduled.
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

The current implementation makes the implicit assumption that if a bit
is set, then the work is scheduled already. Remove the need for this
implicit assumption and call schedule_work() always. It will check
internally whether the work is scheduled already.
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Currently rtl_task() is designed to handle a large number of tasks.
However we have just one, so we can remove some overhead.
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Factor out setting GPHY 10M to new helper rtl8168g_enable_gphy_10m.
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Jeff Kirsher says:

====================
100GbE Intel Wired LAN Driver Updates 2020-03-21

Implement basic support for the devlink interface in the ice driver.
Additionally pave some necessary changes for adding a devlink region that
exposes the NVM contents.

This series first contains 5 patches for enabling and implementing full NVM
read access via the ETHTOOL_GEEPROM interface. This includes some cleanup of
endian-types, a new function for reading from the NVM and Shadow RAM as a flat
addressable space, a function to calculate the available flash size during
load, and a change to how some of the NVM version fields are stored in the
ice_nvm_info structure.

Following this is 3 patches for implementing devlink support. First, one patch
which implements the basic framework and introduces the ice_devlink.c file.
Second, a patch to implement basic .info_get support. Finally, a patch which
reads the device PBA identifier and reports it as the `board.id` value in the
.info_get response.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

Sunil Goutham says:

====================
octeontx2-vf: Add network driver for virtual function

This patch series adds  network driver for the virtual functions of
OcteonTX2 SOC's resource virtualization unit (RVU).

Changes from v3:
   * Removed missed out EXPORT symbols in VF driver.

Changes from v2:
   * Removed Copyright license text.
   * Removed wrapper fn()s around mutex_lock and unlock.
   * Got rid of using macro with 'return'.
   * Removed __weak fn()s.
        - Sugested by Leon Romanovsky and Andrew Lunn

Changes from v1:
   * Removed driver version and fixed authorship
   * Removed driver version and fixed authorship in the already
     upstreamed AF, PF drivers.
   * Removed unnecessary checks in sriov_enable and xmit fn()s.
   * Removed WQ_MEM_RECLAIM flag while creating workqueue.
   * Added lock in tx_timeout task.
   * Added 'supported_coalesce_params' in ethtool ops.
   * Minor other cleanups.
        - Sugested by Jakub Kicinski
====================
Acked-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

This patch removes wrapper fn()s around mutex_init/lock/unlock.
Signed-off-by: Sunil Goutham <sgoutham@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Removed MODULE_VERSION and fixed MODULE_AUTHOR.
Signed-off-by: Sunil Goutham <sgoutham@marvell.com>
Reviewed-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

With MTU sized receive buffers it is not expected to have CQE_RX
with multiple receive buffer pointers. But since same physcial link
is shared by PF and it's VFs, the max receive packet configured
at link could be morethan MTU. Hence there is a chance of receiving
plts morethan MTU which then gets DMA'ed into multiple buffers
and notified in a single CQE_RX. This patch treats such pkts as errors
and frees up receive buffers pointers back to hardware.

Also on the transmit side this patch sets SMQ MAXLEN to max value to avoid
HW length errors for the packets whose size > MTU, eg due to path MTU.
Signed-off-by: Geetha sowjanya <gakula@marvell.com>
Signed-off-by: Sunil Goutham <sgoutham@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

VF shares physical link with PF. Admin function (AF) sends
notification to PF whenever a link change event happens. PF
has to forward the same notification to each of the enabled VF.

PF traps START/STOP_RX messages sent by VF to AF to keep track of
VF's enabled/disabled state.
Signed-off-by: Tomasz Duszynski <tduszynski@marvell.com>
Signed-off-by: Sunil Goutham <sgoutham@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Added ethtool support for VF devices for
 - Driver stats, Tx/Rx perqueue stats
 - Set/show Rx/Tx queue count
 - Set/show Rx/Tx ring sizes
 - Set/show IRQ coalescing parameters
 - RSS configuration etc

It's the PF which owns the interface, hence VF
cannot display underlying CGX interface stats.
Except for this rest ethtool support reuses PF's
APIs.
Signed-off-by: Tomasz Duszynski <tduszynski@marvell.com>
Signed-off-by: Sunil Goutham <sgoutham@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

On OcteonTx2 silicon there two two types VFs, VFs that share the
physical link with their parent SR-IOV PF and the VFs which work
in pairs using internal HW loopback channels (LBK). Except for the
underlying Rx/Tx channel mapping from netdev functionality perspective
they are almost identical. This patch adds netdev driver support
for these VFs.

Unlike it's parent PF a VF cannot directly communicate with admin
function (AF) and it has to go through PF for the same. The mailbox
communication with AF works like 'VF <=> PF <=> AF'.

Also functionality wise VF and PF are identical, hence to avoid code
duplication PF driver's APIs are resued here for HW initialization,
packet handling etc etc ie almost everything. For VF driver to compile
as module exported few of the existing PF driver APIs.
Signed-off-by: Subbaraya Sundeep <sbhatta@marvell.com>
Signed-off-by: Geetha sowjanya <gakula@marvell.com>
Signed-off-by: Tomasz Duszynski <tduszynski@marvell.com>
Signed-off-by: Sunil Goutham <sgoutham@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

When FLR is initiated for a VF (PCI function level reset),
the parent PF gets a interrupt. PF then sends a message to
admin function (AF), which then cleanups all resources attached
to that VF.

Also handled IRQs triggered when master enable bit is cleared
or set for VFs. This handler just clears the transaction pending
ie TRPEND bit.
Signed-off-by: Geetha sowjanya <gakula@marvell.com>
Signed-off-by: Sunil Goutham <sgoutham@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Added 'sriov_configure' to enable/disable virtual functions (VFs).
Also added handling of mailbox messages from these VFs.

Admin function (AF) is the only one with all priviliges to configure
HW, alloc resources etc etc, PFs and it's VFs have to request AF
via mbox for all their needs. But unlike PFs, their VFs cannot
send a mbox request directly. A VF shares a mailbox region with
it's parent PF, so VF sends a mailbox msg to PF and then PF forwards
it to AF. Then AF after processing sends response to PF which it
again forwards to VF.

This patch adds support for this 'VF <=> PF <=> AF' mailbox
communication.
Signed-off-by: Tomasz Duszynski <tduszynski@marvell.com>
Signed-off-by: Subbaraya Sundeep <sbhatta@marvell.com>
Signed-off-by: Christina Jacob <cjacob@marvell.com>
Signed-off-by: Sunil Goutham <sgoutham@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Heiner Kallweit says:

====================
net: phy: add and use phy_check_downshift

So far PHY drivers have to check whether a downshift occurred to be
able to notify the user. To make life of drivers authors a little bit
easier move the downshift notification to phylib. phy_check_downshift()
compares the highest mutually advertised speed with the actual value
of phydev->speed (typically read by the PHY driver from a
vendor-specific register) to detect a downshift.

v2: Add downshift hint to phy_print_status().
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

Now that phylib notifies the user of a downshift we can remove
this functionality from the driver.
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Now that phylib notifies the user of a downshift we can remove
this functionality from the driver.
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

So far PHY drivers have to check whether a downshift occurred to be
able to notify the user. To make life of drivers authors a little bit
easier move the downshift notification to phylib. phy_check_downshift()
compares the highest mutually advertised speed with the actual value
of phydev->speed (typically read by the PHY driver from a
vendor-specific register) to detect a downshift.

v2:
- Add downshift hint to phy_print_status
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Jose Abreu says:

====================
net: phy: xpcs: Improvements for -next

Misc set of improvements for XPCS. All for net-next.

Patch 1/4, returns link error upon 10GKR faults are detected.

Patch 2/4, resets XPCS upon probe so that we start from well known state.

Patch 3/4, sets Link as down if AutoNeg is enabled but did not finish with
success.

Patch 4/4, restarts AutoNeg process if previous outcome was not valid.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

Restart AutoNeg if we didn't get a valid result from previous run.
Signed-off-by: Jose Abreu <Jose.Abreu@synopsys.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Set XPCS Link as down when AutoNeg is enabled but it didn't finish with
success.
Signed-off-by: Jose Abreu <Jose.Abreu@synopsys.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Reset the XPCS upon probe stage so that we start it from well known
state.
Signed-off-by: Jose Abreu <Jose.Abreu@synopsys.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

For 10GKR rate, when link errors are found we need to return fault
status so that XPCS is correctly resumed.
Signed-off-by: Jose Abreu <Jose.Abreu@synopsys.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

When building arm32 allyesconfig:

ld.lld: error: undefined symbol: __aeabi_uldivmod
>>> referenced by spectrum_cnt.c
>>>               net/ethernet/mellanox/mlxsw/spectrum_cnt.o:(mlxsw_sp_counter_resources_register) in archive drivers/built-in.a
>>> did you mean: __aeabi_uidivmod
>>> defined in: arch/arm/lib/lib.a(lib1funcs.o)

pool_size and bank_size are u64; use div64_u64 so that 32-bit platforms
do not error.

Fixes: ab8c4cc6 ("mlxsw: spectrum_cnt: Move config validation along with resource register")
Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Commit 53eca1f3 ("net: rename flow_action_hw_stats_types* ->
flow_action_hw_stats*") renamed just the flow action types and
helpers. For consistency rename variables, enums, struct members
and UAPI too (note that this UAPI was not in any official release,
yet).
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

it's still possible for packetdrill to hang in mptcp_sendmsg(), when the
MPTCP socket falls back to regular TCP (e.g. after receiving unsupported
flags/version during the three-way handshake). Adjust MPTCP socket state
earlier, to ensure correct functionality of mptcp_sendmsg() even in case
of TCP fallback.

Fixes: 767d3ded ("net: mptcp: don't hang before sending 'MP capable with data'")
Fixes: 1954b860 ("mptcp: Check connection state before attempting send")
Signed-off-by: Davide Caratti <dcaratti@redhat.com>
Acked-by: Paolo Abeni <pabeni@redhat.com>
Reviewed-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: David S. Miller <davem@davemloft.net>

Vladimir Oltean says:

====================
MSCC PHY: RGMII delays and VSC8502 support

This series makes RGMII delays configurable as they should be on
Vitesse/Microsemi/Microchip RGMII PHYs, and adds support for a new RGMII
PHY.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>