Similar to xfrm4_tunnel/transport_gso_segment(), _gso_segment()
is added to do gso_segment for esp4 beet mode. Before calling
inet_offloads[proto]->callbacks.gso_segment, it needs to do:

  - Get the upper proto from ph header to get its gso_segment
    when xo->proto is IPPROTO_BEETPH.

  - Add SKB_GSO_TCPV4 to gso_type if x->sel.family == AF_INET6
    and the proto == IPPROTO_TCP, so that the current tcp ipv4
    packet can be segmented.

  - Calculate a right value for skb->transport_header and move
    skb->data to the transport header position.
Signed-off-by: NXin Long <lucien.xin@gmail.com>
Signed-off-by: NSteffen Klassert <steffen.klassert@secunet.com>

The esp fill trailer method is identical for both
IPv6 and IPv4.

Share the implementation for esp6 and esp to avoid
code duplication in addition it could be also used
at various drivers code.
Signed-off-by: NRaed Salem <raeds@mellanox.com>
Reviewed-by: NBoris Pismenny <borisp@mellanox.com>
Reviewed-by: NSaeed Mahameed <saeedm@mellanox.com>
Signed-off-by: NSteffen Klassert <steffen.klassert@secunet.com>

Use kmem_cache_zalloc instead of manually setting kmem_cache_alloc
with flag GFP_ZERO since kzalloc sets allocated memory
to zero.

Change in v2:
     add indation
Signed-off-by: NHuang Zijiang <huang.zijiang@zte.com.cn>
Signed-off-by: NYi Wang <wang.yi59@zte.com.cn>
Signed-off-by: NSteffen Klassert <steffen.klassert@secunet.com>

Lorenzo Bianconi says:

====================
add xdp ethtool stats to mvneta driver

Rework mvneta stats accounting in order to introduce xdp ethtool
statistics in the mvneta driver.
Introduce xdp_redirect, xdp_pass, xdp_drop and xdp_tx counters to
ethtool statistics.
Fix skb_alloc_error and refill_error ethtool accounting
====================
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Get rid of xdp_ret in mvneta_swbm_rx_frame routine since now
we can rely on xdp_stats to flush in case of xdp_redirect
Signed-off-by: NLorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Add xdp_redirect, xdp_pass, xdp_drop and xdp_tx counters
to ethtool statistics
Signed-off-by: NLorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Introduce mvneta_stats structure in mvneta_update_stats routine signature
in order to collect all the rx stats and update them at the end at the
napi loop. mvneta_stats will be reused adding xdp statistics support to
ethtool.
Signed-off-by: NLorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

In oreder to avoid unnecessary instructions rely on open-coding updating
per-cpu stats in mvneta_tx/mvneta_xdp_submit_frame and mvneta_rx_hwbm
routines. This patch will be used to add xdp support to ethtool for the
mvneta driver
Signed-off-by: NLorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

mvneta_ethtool_update_stats routine is currently reporting
skb_alloc_error and refill_error only for the first rx queue.
Fix the issue moving skb_alloc_err and refill_err in
mvneta_pcpu_stats structure.
Moreover this patch will be used to introduce xdp statistics
to ethtool for the mvneta driver

Fixes: 17a96da6 ("net: mvneta: discriminate error cause for missed packet")
Signed-off-by: NLorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Andrew Lunn says:

====================
mv88e6xxx: Add SERDES/PCS registers to ethtool -d

ethtool -d will dump the registers of an interface. For mv88e6xxx
switch ports, this dump covers the port specific registers. Extend
this with the SERDES/PCS registers, if a port has a SERDES.
====================
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The mv88e6390 has upto 8 sets of PCS registers, depending on how ports
9 and 10 are configured. The can be spread over 8 ports. If a port has
a PCS register set, return it along with the port registers. The
register space is sparse, so hard code a list of registers which will
be returned. It can later be extended, if needed, by append to the end
of the list.
Signed-off-by: NAndrew Lunn <andrew@lunn.ch>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The mv88e6352 has one PCS which can be used for 1000BaseX or
SGMII. Add the registers to the dump for the port which the PCS is
associated to.
Signed-off-by: NAndrew Lunn <andrew@lunn.ch>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

ethtool provides a generic mechanism for a driver to return the
registers of an ethernet device. DSA uses this to give the port
registers associated with an interfaces. Extend this to allow PCS
registers to also be returned, if the port has a PCS associated to it.
Signed-off-by: NAndrew Lunn <andrew@lunn.ch>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Jeff Kirsher says:

====================
100GbE Intel Wired LAN Driver Updates 2020-02-15

This series contains updates to ice driver only.

Brett adds support for "Queue in Queue" (QinQ) support, by supporting
S-tag & C-tag VLAN traffic by disabling pruning when there are no 0x8100
VLAN interfaces currently on top of the PF.  Also refactored the port
VLAN configuration to re-use the common code for enabling and disabling
a port VLAN in single function.  Added a helper function to determine if
the VF link is up.  Fixed how the port VLAN configures the priority bits
for a VF interface.  Fixed the port VLAN to only see its own broadcast
and multicast traffic.  Added support to enable and disable all receive
queues, by refactoring adding a new function to do the necessary steps
to enable/disable a queue with the necessary read flush.  Fixed how we
set the mapping mode for transmit and receive queues.  Added support for
VF queues to handle LAN overflow events.  Fixed and refactored how
receive queues get disabled for VFs, which was being handled one queue
at at time, so improve it to handle when the VF is requesting more than
one queue to be disabled.  Fixed how the virtchnl_queue_select bitmap is
validated.

Finally a patch not authored by Brett, Bruce cleans up "fallthrough"
comments which are unnecessary.  Also replaces the "fallthough" comments
with the GCC reserved word fallthrough, along with other GCC compiler
fixes.  Add missing function header comment regarding a function
argument that was missing.
====================
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Finn Thain says:

====================
Improvements for SONIC ethernet drivers

Now that the necessary sonic driver fixes have been merged, and the merge
window has closed again, I'm sending the remainder of my sonic driver
patch queue.

A couple of these patches will have to be applied in sequence to avoid
'git am' rejects. The others are independent and could have been submitted
individually. Please let me know if I should do that.

The complete sonic driver patch queue was tested on National Semiconductor
hardware (macsonic), qemu-system-m68k (macsonic) and qemu-system-mips64el
(jazzsonic).
====================
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

On m68k, local irqs remain enabled while interrupt handlers execute.
Therefore the macsonic driver has had to disable interrupts to avoid
re-entering sonic_interrupt().

As of commit 865ad2f2 ("net/sonic: Add mutual exclusion for accessing
shared state"), sonic_interrupt() became re-entrant, and its wrapper
became redundant.
Tested-by: NStan Johnson <userm57@yahoo.com>
Signed-off-by: NFinn Thain <fthain@telegraphics.com.au>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Give the transmit command as soon as the transmit descriptor is ready.
Tested-by: NStan Johnson <userm57@yahoo.com>
Signed-off-by: NFinn Thain <fthain@telegraphics.com.au>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The explicit memory barriers are redundant now that proper locking and
MMIO accessors have been employed.
Tested-by: NStan Johnson <userm57@yahoo.com>
Signed-off-by: NFinn Thain <fthain@telegraphics.com.au>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The transmit queue must be running already otherwise sonic_send_packet()
would not have been called. If the queue was stopped by the interrupt
handler, the interrupt handler will restart it again.
Tested-by: NStan Johnson <userm57@yahoo.com>
Signed-off-by: NFinn Thain <fthain@telegraphics.com.au>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The eol_tx variable is the one that matters to the tx algorithm because
packets are always placed at the end of the list. The next_tx variable
just confuses things so remove it.
Tested-by: NStan Johnson <userm57@yahoo.com>
Signed-off-by: NFinn Thain <fthain@telegraphics.com.au>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

No functional change.
Tested-by: NStan Johnson <userm57@yahoo.com>
Signed-off-by: NFinn Thain <fthain@telegraphics.com.au>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The comment is meaningless since mark_bh() was removed a long time ago.
Tested-by: NStan Johnson <userm57@yahoo.com>
Signed-off-by: NFinn Thain <fthain@telegraphics.com.au>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Sergei Shtylyov says:

====================
sh_eth: get rid of the dedicated regiseter mapping for RZ/A1 (R7S72100)

Here's a set of 5 patches against DaveM's 'net-next.git' repo.

I changed my mind about the RZ/A1 SoC needing its own register
map -- now that we don't depend on the register map array in order
to determine whether a given register exists any more, we can add
a new flag to determine if the GECMR exists (this register is
present only on true GEther chips, not RZ/A1). We also need to
add the sh_eth_cpu_data::* flag checks where they were missing
so far: in the ethtool API for the register dump.
====================
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The register maps for the Gigabit controllers and the Ether one used on
RZ/A1  (AKA R7S72100) are identical except for GECMR which is only present
on the true GEther controllers.  We no longer use the register map arrays
to determine if a given register exists,  and have added the GECMR flag to
the 'struct sh_eth_cpu_data' in the previous patch, so we're ready to drop
the R7S72100 specific register map -- this saves 216 bytes of object code
(ARM gcc 4.8.5).
Signed-off-by: NSergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Tested-by: NChris Brandt <chris.brandt@renesas.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Not all Ether controllers having the Gigabit register layout have GECMR --
RZ/A1 (AKA R7S72100) actually has the same layout but no Gigabit speed
support and hence no GECMR. In the past, the new register map table was
added for this SoC, now I think we should have used the existing Gigabit
table with the differences (such as GECMR) covered by the mere flags in
the 'struct sh_eth_cpu_data'. Add such flag for GECMR -- and then we can
get rid of the R7S72100 specific layout in the next patch...
Signed-off-by: NSergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Tested-by: NChris Brandt <chris.brandt@renesas.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

When adding the sh_eth_cpu_data::no_xdfar flag I forgot to add the flag
check to  __sh_eth_get_regs(), causing the non-existing RDFAR/TDFAR to be
considered for dumping on the R-Car gen1/2 SoCs (the register offset check
has the final say here)...

Fixes: 4c1d4585 ("sh_eth: add sh_eth_cpu_data::cexcr flag")
Signed-off-by: NSergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Tested-by: NChris Brandt <chris.brandt@renesas.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

When adding the sh_eth_cpu_data::cexcr flag I forgot to add the flag
check to  __sh_eth_get_regs(), causing the non-existing RX packet counter
registers to be considered for dumping on  the R7S72100 SoC (the register
offset sanity check has the final say here)...

Fixes: 4c1d4585 ("sh_eth: add sh_eth_cpu_data::cexcr flag")
Signed-off-by: NSergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Tested-by: NChris Brandt <chris.brandt@renesas.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

When adding the sh_eth_cpu_data::no_tx_cntrs flag I forgot to add the
flag check to  __sh_eth_get_regs(), causing the non-existing TX counter
registers to be considered for dumping on the R7S72100 SoC (the register
offset sanity check has the final say here)...

Fixes: ce9134df ("sh_eth: add sh_eth_cpu_data::no_tx_cntrs flag")
Signed-off-by: NSergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Tested-by: NChris Brandt <chris.brandt@renesas.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Russell King says:

====================
Pause updates for phylib and phylink

Currently, phylib resolves the speed and duplex settings, which MAC
drivers use directly. phylib also extracts the "Pause" and "AsymPause"
bits from the link partner's advertisement, and stores them in struct
phy_device's pause and asym_pause members with no further processing.
It is left up to each MAC driver to implement decoding for this
information.

phylink converted drivers are able to take advantage of code therein
which resolves the pause advertisements for the MAC driver, but this
does nothing for unconverted drivers. It also does not allow us to
make use of hardware-resolved pause states offered by several PHYs.

This series aims to address this by:

1. Providing a generic implementation, linkmode_resolve_pause(), that
   takes the ethtool linkmode arrays for the link partner and local
   advertisements, decoding the result to whether pause frames should
   be allowed to be transmitted or received and acted upon.  I call
   this the pause enablement state.

2. Providing a phylib implementation, phy_get_pause(), which allows
   MAC drivers to request the pause enablement state from phylib.

3. Providing a generic linkmode_set_pause() for setting the pause
   advertisement according to the ethtool tx/rx flags - note that this
   design has some shortcomings, see the comments in the kerneldoc for
   this function.

4. Remove the ability in phylink to set the pause states for fixed
   links, which brings them into line with how we deal with the speed
   and duplex parameters; we can reintroduce this later if anyone
   requires it.  This could be a userspace-visible change.

5. Split application of manual pause enablement state from phylink's
   resolution of the same to allow use of phylib's new phy_get_pause()
   interface by phylink, and make that switch.

6. Resolve the fixed-link pause enablement state using the generic
   linkmode_resolve_pause() helper introduced earlier. This, in
   connection with the previous commits, allows us to kill the
   MLO_PAUSE_SYM and MLO_PAUSE_ASYM flags.

7. make phylink's ethtool pause setting implementation update the
   pause advertisement in the same way that phylib does, with the
   same caveats that are present there (as mentioned above w.r.t
   linkmode_set_pause()).

8. create a more accurate initial configuration for MACs, used when
   phy_start() is called or a SFP is detected. In particular, this
   ensures that the pause bits seen by MAC drivers in state->pause
   are accurate for SGMII.

9. finally, update the kerneldoc descriptions for mac_config() for
   the above changes.

This series has been build-tested against net-next; the boot tested
patches are in my "phy" branch against v5.5 plus the queued phylink
changes that were merged for 5.6.

The next series will introduce the ability for phylib drivers to
provide hardware resolved pause enablement state.  These patches can
be found in my "phy" branch.
====================
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Clarify the expected flow control settings operation in the phylink
documentation for each negotiation mode.
Signed-off-by: NRussell King <rmk+kernel@armlinux.org.uk>
Reviewed-by: NAndrew Lunn <andrew@lunn.ch>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Improve the initial MAC configuration so we get a configuration which
more represents the final operating mode, in particular with respect
to the flow control settings.

We do this by:
1) more fully initialising our phy state, so we can use this as the
   initial state for PHY based connections.
2) reading the fixed link state.
3) ensuring that in-band mode has sane pause settings for SGMII vs
   802.3z negotiation modes.

In all three cases, we ensure that state->link is false, just in case
any MAC drivers have other ideas by mis-using this member, and we also
take account of manual pause mode configuration at this point.

This avoids MLO_PAUSE_AN being seen in mac_config() when operating in
PHY, fixed mode or inband SGMII mode, thereby giving cleaner semantics
to the pause flags.  As a result of this, the pause flags now indicate
in a mode-independent way what is required from a mac_config()
implementation.
Signed-off-by: NRussell King <rmk+kernel@armlinux.org.uk>
Reviewed-by: NAndrew Lunn <andrew@lunn.ch>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

When ethtool -A is used to change the pause modes, the pause
advertisement is not being changed, but the documentation in
uapi/linux/ethtool.h says we should be. Add that capability to
phylink.
Signed-off-by: NRussell King <rmk+kernel@armlinux.org.uk>
Reviewed-by: NAndrew Lunn <andrew@lunn.ch>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Resolve the fixed link flow control using the recently introduced
linkmode_resolve_pause() helper, which we use in
phylink_get_fixed_state() only when operating in full duplex mode.
Signed-off-by: NRussell King <rmk+kernel@armlinux.org.uk>
Reviewed-by: NAndrew Lunn <andrew@lunn.ch>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Use the new phy_get_pause() helper to get the resolved pause modes for
a PHY rather than resolving the pause modes ourselves. We temporarily
retain our pause mode resolution for causes where there is no PHY
attached, e.g. for fixed-link modes.
Signed-off-by: NRussell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Split the application of manually controlled flow control modes from
phylink_resolve_flow(), so that we can use alternative providers of
flow control resolution.

We also want to clear the MLO_PAUSE_AN flag when autoneg is disabled,
since flow control can't be negotiated in this circumstance.
Signed-off-by: NRussell King <rmk+kernel@armlinux.org.uk>
Reviewed-by: NAndrew Lunn <andrew@lunn.ch>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Remove the ability for ethtool -A to change the pause settings for
fixed links; if this is really required, we can reinstate it later.

Andrew Lunn agrees: "So I think it is safe to not implement ethtool
-A, at least until somebody has a real use case for it."

Lets avoid making things too complex for use cases that aren't being
used.
Signed-off-by: NRussell King <rmk+kernel@armlinux.org.uk>
Reviewed-by: NAndrew Lunn <andrew@lunn.ch>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Add a linkmode helper to set the flow control advertisement in an
ethtool linkmode mask according to the tx/rx capabilities. This
implementation is moved from phylib, and documented with an
analysis of its shortcomings.
Signed-off-by: NRussell King <rmk+kernel@armlinux.org.uk>
Reviewed-by: NAndrew Lunn <andrew@lunn.ch>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Add a couple of helpers to resolve negotiated flow control. Two helpers
are provided:

- linkmode_resolve_pause() which takes the link partner and local
  advertisements, and decodes whether we should enable TX or RX pause
  at the MAC. This is useful outside of phylib, e.g. in phylink.
- phy_get_pause(), which returns the TX/RX enablement status for the
  current negotiation results of the PHY.

This allows us to centralise the flow control resolution, rather than
spreading it around.
Signed-off-by: NRussell King <rmk+kernel@armlinux.org.uk>
Reviewed-by: NAndrew Lunn <andrew@lunn.ch>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

linkmode_test_bit() does not modify the address; test_bit() is also
declared const volatile for the same reason. There's no need for
linkmode_test_bit() to be any different, and allows implementation of
helpers that take a const linkmode pointer.
Reviewed-by: NAndrew Lunn <andrew@lunn.ch>
Signed-off-by: NRussell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Heiner Kallweit says:

====================
r8169: series with further smaller improvements

Nothing too exciting. This series includes further smaller
improvements.
====================
Signed-off-by: NDavid S. Miller <davem@davemloft.net>