The ice_ptp_tx_cfg_intr() function sends a control queue message to
configure the PHY timestamp interrupt block. This is a very similar name
to a function which is used to configure the MAC Other Interrupt Cause
Enable register.

Rename this function to ice_ptp_cfg_phy_interrupt in order to make it
more obvious to the reader what action it performs, and distinguish it
from other similarly named functions.
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Signed-off-by: Karol Kolacinski <karol.kolacinski@intel.com>
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Tested-by: Pucha Himasekhar Reddy <himasekharx.reddy.pucha@intel.com> (A Contingent worker at Intel)
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

E810 hardware does not have a Tx timestamp ready bitmap. Don't check
has_ready_bitmap in E810-specific functions.
Add has_ready_bitmap check in ice_ptp_process_tx_tstamp() to stop
relying on the fact that ice_get_phy_tx_tstamp_ready() returns all 1s.
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Signed-off-by: Karol Kolacinski <karol.kolacinski@intel.com>
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Tested-by: Pucha Himasekhar Reddy <himasekharx.reddy.pucha@intel.com> (A Contingent worker at Intel)
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

The tx->verify_cached flag is used to inform the Tx timestamp tracking
code whether it needs to verify the cached Tx timestamp value against
a previous captured value. This is necessary on E810 hardware which does
not have a Tx timestamp ready bitmap.

In addition, we currently rely on the fact that the
ice_get_phy_tx_tstamp_ready() function returns all 1s for E810 hardware.
Instead of introducing a brand new flag, rename and verify_cached to
has_ready_bitmap, inverting the relevant checks.
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Signed-off-by: Karol Kolacinski <karol.kolacinski@intel.com>
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Tested-by: Pucha Himasekhar Reddy <himasekharx.reddy.pucha@intel.com> (A Contingent worker at Intel)
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

The ice_ptp_prepare_for_reset() and ice_ptp_reset() functions currently
check the pf->flags ICE_FLAG_PFR_REQ bit to determine if the current
reset is a PF reset or not.

This is problematic, because it is possible that a PF reset and a higher
level reset (CORE reset, GLOBAL reset, EMP reset) are requested
simultaneously. In that case, the driver performs the highest level
reset requested. However, the ICE_FLAG_PFR_REQ flag will still be set.

The main driver reset functions take an enum ice_reset_req indicating
which reset is actually being performed. Pass this data into the PTP
functions and rely on this instead of relying on the driver flags.

This ensures that the PTP code performs the proper level of reset that
the driver is actually undergoing.
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Signed-off-by: Karol Kolacinski <karol.kolacinski@intel.com>
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Tested-by: Pucha Himasekhar Reddy <himasekharx.reddy.pucha@intel.com> (A Contingent worker at Intel)
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

Add PTP state machine so that the driver can correctly identify PTP
state around resets.
When the driver got information about ungraceful reset, PTP was not
prepared for reset and it returned error. When this situation occurs,
prepare PTP before rebuilding its structures.
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Co-developed-by: Karol Kolacinski <karol.kolacinski@intel.com>
Signed-off-by: Karol Kolacinski <karol.kolacinski@intel.com>
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Tested-by: Pucha Himasekhar Reddy <himasekharx.reddy.pucha@intel.com> (A Contingent worker at Intel)
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

For now, the packet with an old ack is not accepted if we are in
FIN_WAIT1 state, which can cause retransmission. Taking the following
case as an example:

    Client                               Server
      |                                    |
  FIN_WAIT1(Send FIN, seq=10)          FIN_WAIT1(Send FIN, seq=20, ack=10)
      |                                    |
      |                                Send ACK(seq=21, ack=11)
   Recv ACK(seq=21, ack=11)
      |
   Recv FIN(seq=20, ack=10)

In the case above, simultaneous close is happening, and the FIN and ACK
packet that send from the server is out of order. Then, the FIN will be
dropped by the client, as it has an old ack. Then, the server has to
retransmit the FIN, which can cause delay if the server has set the
SO_LINGER on the socket.

Old ack is accepted in the ESTABLISHED and TIME_WAIT state, and I think
it should be better to keep the same logic.

In this commit, we accept old ack in FIN_WAIT1/FIN_WAIT2/CLOSING/LAST_ACK
states. Maybe we should limit it to FIN_WAIT1 for now?
Signed-off-by: Menglong Dong <menglong8.dong@gmail.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Link: https://lore.kernel.org/r/20240126040519.1846345-1-menglong8.dong@gmail.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

Arınç ÜNAL says:

====================
MT7530 DSA Subdriver Improvements Act I

This patch series simplifies the MT7530 DSA subdriver and improves the
logic of the support for MT7530, MT7531, and the switch on the MT7988 SoC.

I have done a simple ping test to confirm basic communication on all switch
ports on MCM and standalone MT7530, and MT7531 switch with this patch
series applied.

MT7621 Unielec, MCM MT7530:

rgmii-only-gmac0-mt7621-unielec-u7621-06-16m.dtb
gmac0-and-gmac1-mt7621-unielec-u7621-06-16m.dtb

tftpboot 0x80008000 mips-uzImage.bin; tftpboot 0x83000000 mips-rootfs.cpio.uboot; tftpboot 0x83f00000 $dtb; bootm 0x80008000 0x83000000 0x83f00000

MT7622 Bananapi, MT7531:

gmac0-and-gmac1-mt7622-bananapi-bpi-r64.dtb

tftpboot 0x40000000 arm64-Image; tftpboot 0x45000000 arm64-rootfs.cpio.uboot; tftpboot 0x4a000000 $dtb; booti 0x40000000 0x45000000 0x4a000000

MT7623 Bananapi, standalone MT7530:

rgmii-only-gmac0-mt7623n-bananapi-bpi-r2.dtb
gmac0-and-gmac1-mt7623n-bananapi-bpi-r2.dtb

tftpboot 0x80008000 arm-zImage; tftpboot 0x83000000 arm-rootfs.cpio.uboot; tftpboot 0x83f00000 $dtb; bootz 0x80008000 0x83000000 0x83f00000

This patch series is the continuation of the patch series linked below.

https://lore.kernel.org/r/20230522121532.86610-1-arinc.unal@arinc9.com

v2: https://lore.kernel.org/r/20231227044347.107291-1-arinc.unal@arinc9.com
v1: https://lore.kernel.org/r/20231118123205.266819-1-arinc.unal@arinc9.comSigned-off-by: Arınç ÜNAL <arinc.unal@arinc9.com>
====================

Link: https://lore.kernel.org/r/20240122-for-netnext-mt7530-improvements-1-v3-0-042401f2b279@arinc9.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

There's no need to run all the code on mt7530_setup_port5() if port 5 is
disabled. The only case for calling mt7530_setup_port5() from
mt7530_setup() is when PHY muxing is enabled. That is because port 5 is not
defined as a port on the devicetree, therefore, it cannot be controlled by
phylink.

Because of this, run mt7530_setup_port5() if priv->p5_intf_sel is
P5_INTF_SEL_PHY_P0 or P5_INTF_SEL_PHY_P4. Remove the P5_DISABLED case from
mt7530_setup_port5().

Stop initialising the interface variable as the remaining cases will always
call mt7530_setup_port5() with it initialised.
Signed-off-by: Arınç ÜNAL <arinc.unal@arinc9.com>
Reviewed-by: Vladimir Oltean <olteanv@gmail.com>
Link: https://lore.kernel.org/r/20240122-for-netnext-mt7530-improvements-1-v3-7-042401f2b279@arinc9.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

Running mt7530_setup_port5() from mt7530_setup() used to handle all cases
of configuring port 5, including phylink.

Setting priv->p5_interface under mt7530_setup_port5() makes sure that
mt7530_setup_port5() from mt753x_phylink_mac_config() won't run.

The commit ("net: dsa: mt7530: improve code path for setting up port 5")
makes so that mt7530_setup_port5() from mt7530_setup() runs only on
non-phylink cases.

Get rid of unnecessarily setting priv->p5_interface under
mt7530_setup_port5() as port 5 phylink configuration will be done by
running mt7530_setup_port5() from mt753x_phylink_mac_config() now.
Signed-off-by: Arınç ÜNAL <arinc.unal@arinc9.com>
Reviewed-by: Vladimir Oltean <olteanv@gmail.com>
Link: https://lore.kernel.org/r/20240122-for-netnext-mt7530-improvements-1-v3-6-042401f2b279@arinc9.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

There're two code paths for setting up port 5:

mt7530_setup()
-> mt7530_setup_port5()

mt753x_phylink_mac_config()
-> mt753x_mac_config()
   -> mt7530_mac_config()
      -> mt7530_setup_port5()

Currently mt7530_setup_port5() from mt7530_setup() always runs. If port 5
is used as a CPU, DSA, or user port, mt7530_setup_port5() from
mt753x_phylink_mac_config() won't run. That is because priv->p5_interface
set on mt7530_setup_port5() will match state->interface on
mt753x_phylink_mac_config() which will stop running mt7530_setup_port5()
again.

Therefore, mt7530_setup_port5() will never run from
mt753x_phylink_mac_config().

Address this by not running mt7530_setup_port5() from mt7530_setup() if
port 5 is used as a CPU, DSA, or user port. This driver isn't in the
dsa_switches_apply_workarounds[] array so phylink will always be present.

To keep the cases where port 5 isn't controlled by phylink working as
before, preserve the mt7530_setup_port5() call from mt7530_setup().

Do not set priv->p5_intf_sel to P5_DISABLED. It is already set to that when
"priv" is allocated.

Move setting the interface to a more specific location. It's supposed to be
overwritten if PHY muxing is detected.

Improve the comment which explains the process.
Signed-off-by: Arınç ÜNAL <arinc.unal@arinc9.com>
Reviewed-by: Vladimir Oltean <olteanv@gmail.com>
Link: https://lore.kernel.org/r/20240122-for-netnext-mt7530-improvements-1-v3-5-042401f2b279@arinc9.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

There's no logic to numerically order the CPU ports. Just state the port
number instead.

Remove the irrelevant PHY muxing information from
mt7530_mac_port_get_caps(). Explain the supported MII modes instead.

Remove the out of place PHY muxing information from
mt753x_phylink_mac_config(). The function is for MT7530, MT7531, and the
switch on the MT7988 SoC but there's no PHY muxing on MT7531 or the switch
on the MT7988 SoC.

These comments were gradually introduced with the commits below.
commit ca366d6c ("net: dsa: mt7530: Convert to PHYLINK API")
commit 38f790a8 ("net: dsa: mt7530: Add support for port 5")
commit 88bdef8b ("net: dsa: mt7530: Extend device data ready for adding
a new hardware")
commit c288575f ("net: dsa: mt7530: Add the support of MT7531 switch")
Signed-off-by: Arınç ÜNAL <arinc.unal@arinc9.com>
Acked-by: Daniel Golle <daniel@makrotopia.org>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Vladimir Oltean <olteanv@gmail.com>
Link: https://lore.kernel.org/r/20240122-for-netnext-mt7530-improvements-1-v3-4-042401f2b279@arinc9.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

Introduce the p5_sgmii field to store the information for whether port 5
has got SGMII or not. Instead of reading the MT7531_TOP_SIG_SR register
multiple times, the register will be read once and the value will be
stored on the p5_sgmii field. This saves unnecessary reads of the
register.

Move the comment about MT7531AE and MT7531BE to mt7531_setup(), where the
switch is identified.

Get rid of mt7531_dual_sgmii_supported() now that priv->p5_sgmii stores the
information. Address the code where mt7531_dual_sgmii_supported() is used.

Get rid of mt7531_is_rgmii_port() which just prints the opposite of
priv->p5_sgmii.

Instead of calling mt7531_pll_setup() then returning, do not call it if
port 5 is SGMII.

Remove P5_INTF_SEL_GMAC5_SGMII. The p5_interface_select enum is supposed to
represent the mode that port 5 is being used in, not the hardware
information of port 5. Set p5_intf_sel to P5_INTF_SEL_GMAC5 instead, if
port 5 is not dsa_is_unused_port().
Signed-off-by: Arınç ÜNAL <arinc.unal@arinc9.com>
Acked-by: Daniel Golle <daniel@makrotopia.org>
Reviewed-by: Vladimir Oltean <olteanv@gmail.com>
Link: https://lore.kernel.org/r/20240122-for-netnext-mt7530-improvements-1-v3-3-042401f2b279@arinc9.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

Use the p5_interface_select enumeration as the data type for the
p5_intf_sel field. This ensures p5_intf_sel can only take the values
defined in the p5_interface_select enumeration.

Remove the explicit assignment of 0 to P5_DISABLED as the first enum item
is automatically assigned 0.
Signed-off-by: Arınç ÜNAL <arinc.unal@arinc9.com>
Acked-by: Daniel Golle <daniel@makrotopia.org>
Reviewed-by: Vladimir Oltean <olteanv@gmail.com>
Link: https://lore.kernel.org/r/20240122-for-netnext-mt7530-improvements-1-v3-2-042401f2b279@arinc9.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

On the MT7530 switch, the CPU_PORT field indicates which CPU port to trap
frames to, regardless of the affinity of the inbound user port.

When multiple CPU ports are in use, if the DSA conduit interface is down,
trapped frames won't be passed to the conduit interface.

To make trapping frames work including this case, implement
ds->ops->conduit_state_change() on this subdriver and set the CPU_PORT
field to the numerically smallest CPU port whose conduit interface is up.
Introduce the active_cpu_ports field to store the information of the active
CPU ports. Correct the macros, CPU_PORT is bits 4 through 6 of the
register.

Add a comment to explain frame trapping for this switch.

Currently, the driver doesn't support the use of multiple CPU ports so this
is not necessarily a bug fix.
Suggested-by: Vladimir Oltean <olteanv@gmail.com>
Suggested-by: Russell King (Oracle) <linux@armlinux.org.uk>
Signed-off-by: Arınç ÜNAL <arinc.unal@arinc9.com>
Reviewed-by: Vladimir Oltean <olteanv@gmail.com>
Link: https://lore.kernel.org/r/20240122-for-netnext-mt7530-improvements-1-v3-1-042401f2b279@arinc9.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

We had to add another synchronize_rcu() in recent fix.
Bite the bullet and add an rcu_head to netdev_name_node,
free from RCU.

Note that name_node does not hold any reference on dev
to which it points, but there must be a synchronize_rcu()
on device removal path, so we should be fine.
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

The TRF7970A is a SPI device, not I2C.
Signed-off-by: Tobias Schramm <t.schramm@manjaro.org>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

The RENESAS FemtoClock3 Wireless is a high-performance jitter attenuator,
frequency translator, and clock synthesizer. The device is comprised of 3
digital PLLs (DPLL) to track CLKIN inputs and three independent low phase
noise fractional output dividers (FOD) that output low phase noise clocks.

FemtoClock3 supports one Time Synchronization (Time Sync) channel to enable
an external processor to control the phase and frequency of the Time Sync
channel and to take phase measurements using the TDC. Intended applications
are synchronization using the precision time protocol (PTP) and
synchronization with 0.5 Hz and 1 Hz signals from GNSS.
Signed-off-by: Min Li <min.li.xe@renesas.com>
Acked-by: Lee Jones <lee@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

This change is for the PHC devices that can measure the phase offset
between PHC signal and the external signal, such as the 1PPS signal of
GNSS. Reporting PTP_CLOCK_EXTOFF to user space will be piggy-backed to
the existing ptp_extts_event so that application such as ts2phc can
poll the external offset the same way as extts. Hence, ts2phc can use
the offset to achieve the alignment between PHC and the external signal
by the help of either SW or HW filters.
Signed-off-by: Min Li <min.li.xe@renesas.com>
Acked-by: Richard Cochran <richardcochran@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Breno Leitao says:

====================
Fix MODULE_DESCRIPTION() for net (p3)

There are hundreds of network modules that misses MODULE_DESCRIPTION(),
causing a warning when compiling with W=1. Example:

        WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/net/arcnet/com90io.o
        WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/net/arcnet/arc-rimi.o
        WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/net/arcnet/com20020.o

This part3 of the patchset focus on the missing ethernet drivers, which
is now warning free. This also fixes net/pcs and ieee802154.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

W=1 builds now warn if module is built without a MODULE_DESCRIPTION().
Add descriptions to arcnet module.
Signed-off-by: Breno Leitao <leitao@debian.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

W=1 builds now warn if module is built without a MODULE_DESCRIPTION().
Add descriptions to ieee802154 modules.
Signed-off-by: Breno Leitao <leitao@debian.org>
Acked-by: Miquel Raynal <miquel.raynal@bootlin.com>
Acked-by: Stefan Schmidt <stefan@datenfreihafen.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

W=1 builds now warn if module is built without a MODULE_DESCRIPTION().
Add descriptions to the Lynx, XPCS and LynxI PCS drivers.
Signed-off-by: Breno Leitao <leitao@debian.org>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

W=1 builds now warn if module is built without a MODULE_DESCRIPTION().
Add descriptions to the Beckhoff CX5020 EtherCAT Ethernet driver.
Signed-off-by: Breno Leitao <leitao@debian.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

W=1 builds now warn if module is built without a MODULE_DESCRIPTION().
Add descriptions to the TI CPSW switch module.
Signed-off-by: Breno Leitao <leitao@debian.org>
Reviewed-by: Roger Quadros <rogerq@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

W=1 builds now warn if module is built without a MODULE_DESCRIPTION().
Add descriptions to the STMicro DWMAC for Altera SOCs.
Signed-off-by: Breno Leitao <leitao@debian.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

W=1 builds now warn if module is built without a MODULE_DESCRIPTION().
Add descriptions to the Qualcom rmnet and emac drivers.
Signed-off-by: Breno Leitao <leitao@debian.org>
Reviewed-by: Subash Abhinov Kasiviswanathan <quic_subashab@quicinc.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

W=1 builds now warn if module is built without a MODULE_DESCRIPTION().
Add descriptions to the SMSC 91x/911x/9420 Ethernet drivers.
Signed-off-by: Breno Leitao <leitao@debian.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

W=1 builds now warn if module is built without a MODULE_DESCRIPTION().
Add descriptions to the Ocelot SoCs (VSC7514) helpers driver.
Signed-off-by: Breno Leitao <leitao@debian.org>
Reviewed-by: Horatiu Vultur <horatiu.vultur@microchip.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

W=1 builds now warn if module is built without a MODULE_DESCRIPTION().
Add descriptions to the Microchip ENCX24J600 helpers driver.
Signed-off-by: Breno Leitao <leitao@debian.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

As of now, the field TCA_TAPRIO_ATTR_FLAGS is being validated by manually
checking its value, using the function taprio_flags_valid().

With this patch, the field will be validated through the netlink policy
NLA_POLICY_MASK, where the mask is defined by TAPRIO_SUPPORTED_FLAGS.
The mutual exclusivity of the two flags TCA_TAPRIO_ATTR_FLAG_FULL_OFFLOAD
and TCA_TAPRIO_ATTR_FLAG_TXTIME_ASSIST is still checked manually.

Changes since RFC:
- fixed reversed xmas tree
- use NL_SET_ERR_MSG_MOD() for both invalid configuration

Changes since v1:
- Changed NL_SET_ERR_MSG_MOD to NL_SET_ERR_MSG_ATTR when wrong flags
  issued
- Changed __u32 to u32

Changes since v2:
- Added the missing parameter for NL_SET_ERR_MSG_ATTR (sorry again for
  the noise)
Signed-off-by: Alessandro Marcolini <alessandromarcolini99@gmail.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

This patch adds hardware profile supports for extracting packet headers.
It makes sure that hardware is capabale of extracting ICMP, CPT, ERSPAN
headers.
Signed-off-by: Suman Ghosh <sumang@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Jiawen Wu says:

====================
Implement irq_domain for TXGBE

Implement irq_domain for the MAC interrupt and handle the sub-irqs.

v3 -> v4:
- fix build error

v2 -> v3:
- use macro defines instead of magic number

v1 -> v2:
- move interrupt codes to txgbe_irq.c
- add txgbe-link-irq to msic irq domain
- remove functions that are not needed
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

In the current interrupt controller, the MAC interrupt acts as the
parent interrupt in the GPIO IRQ chip. But when the number of Rx/Tx
ring changes, the PCI IRQ vector needs to be reallocated. Then this
interrupt controller would be corrupted. So use irq_domain structure
to avoid the above problem.
Signed-off-by: Jiawen Wu <jiawenwu@trustnetic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

In order to change the interrupt response structure, there will be a
lot of code added next. Move these interrupt codes to a new file, to
make the codes cleaner.
Signed-off-by: Jiawen Wu <jiawenwu@trustnetic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Add a note when using esw_port_metadata. The parameter has runtime
mode but setting it does not take effect immediately. Setting it must
happen in legacy mode, and the port metadata takes effects when the
switchdev mode is enabled.

Disable eswitch port metadata::
  $ devlink dev param set pci/0000:06:00.0 name esw_port_metadata value \
    false cmode runtime
Change eswitch mode to switchdev mode where after choosing the metadata value::
  $ devlink dev eswitch set pci/0000:06:00.0 mode switchdev

Note that other mlx5 devlink runtime parameters, esw_multiport and
flow_steering_mode, do not have this limitation.
Signed-off-by: William Tu <witu@nvidia.com>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Since 6.8-rc1, using VTABLE_DEFAULT_ERROR for optional functions
(never called) in #[vtable] is the recommended way.

Note that no functional changes in this patch.
Signed-off-by: FUJITA Tomonori <fujita.tomonori@gmail.com>
Reviewed-by: Trevor Gross <tmgross@umich.edu>
Signed-off-by: David S. Miller <davem@davemloft.net>

The relative paths like the following are bothersome and don't work
with `O=` builds:

//! C headers: [`include/linux/phy.h`](../../../../../../../include/linux/phy.h).

This updates such links by using the `srctree`-relative link feature
introduced in 6.8-rc1 like:

//! C headers: [`include/linux/phy.h`](srctree/include/linux/phy.h).
Signed-off-by: FUJITA Tomonori <fujita.tomonori@gmail.com>
Reviewed-by: Trevor Gross <tmgross@umich.edu>
Signed-off-by: David S. Miller <davem@davemloft.net>

Oleksij Rempel says:

====================
net: dsa: microchip: implement PHY loopback
====================

Link: https://lore.kernel.org/r/20240124123314.734815-1-o.rempel@pengutronix.deSigned-off-by: Jakub Kicinski <kuba@kernel.org>

Correct the PHY loopback bit handling in the ksz8_w_phy_bmcr and
ksz8_r_phy_bmcr functions for KSZ8794 and KSZ8873 variants in the ksz8795
driver. Previously, the code erroneously used Bit 7 of port register 0xD
for both chip variants, which is actually for LED configuration. This
update ensures the correct registers and bits are used for the PHY
loopback feature:

- For KSZ8794: Use 0xF / Bit 7.
- For KSZ8873: Use 0xD / Bit 0.

The lack of loopback support was seen on KSZ8873 system by using
"ethtool -t lanX". After this patch, the ethtool selftest will work,
but only if port is not part of a bridge.
Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Acked-by: Arun Ramadoss <arun.ramadoss@microchip.com>
Link: https://lore.kernel.org/r/20240124123314.734815-4-o.rempel@pengutronix.deSigned-off-by: Jakub Kicinski <kuba@kernel.org>

Remove the manual checks for register value changes in the
ksz8_w_phy_bmcr function. Instead, rely on regmap_update_bits() for
optimizing register updates.
Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Acked-by: Arun Ramadoss <arun.ramadoss@microchip.com>
Link: https://lore.kernel.org/r/20240124123314.734815-3-o.rempel@pengutronix.deSigned-off-by: Jakub Kicinski <kuba@kernel.org>