With ARCH=hexagon, make allmodconfig && make W=1 C=1 reports:
WARNING: modpost: missing MODULE_DESCRIPTION() in drivers/net/ethernet/synopsys/dwc-xlgmac.o

With most other ARCH settings the MODULE_DESCRIPTION() is provided by
the macro invocation in dwc-xlgmac-pci.c. However, for hexagon, the
PCI bus is not enabled, and hence CONFIG_DWC_XLGMAC_PCI is not set.
As a result, dwc-xlgmac-pci.c is not compiled, and hence is not linked
into dwc-xlgmac.o.

To avoid this issue, relocate the MODULE_DESCRIPTION() and other
related macros from dwc-xlgmac-pci.c to dwc-xlgmac-common.c, since
that file already has an existing MODULE_LICENSE() and it is
unconditionally linked into dwc-xlgmac.o.
Signed-off-by: Jeff Johnson <quic_jjohnson@quicinc.com>
Link: https://lore.kernel.org/r/20240616-md-hexagon-drivers-net-ethernet-synopsys-v1-1-55852b60aef8@quicinc.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

To cleanup rxqs in port context structures, instead of duplicating the
code, use existing function mana_cleanup_port_context() which does
the exact cleanup that's needed.
Signed-off-by: Shradha Gupta <shradhagupta@linux.microsoft.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Reviewed-by: Wei Liu <wei.liu@kernel.org>
Reviewed-by: Heng Qi <hengqi@linux.alibaba.com>
Link: https://lore.kernel.org/r/1718349548-28697-1-git-send-email-shradhagupta@linux.microsoft.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

Drop the WARN_ON_ONCE inn gue_gro_receive if the encapsulated type is
not known or does not have a GRO handler.

Such a packet is easily constructed. Syzbot generates them and sets
off this warning.

Remove the warning as it is expected and not actionable.

The warning was previously reduced from WARN_ON to WARN_ON_ONCE in
commit 27013661 ("fou: Do WARN_ON_ONCE in gue_gro_receive for bad
proto callbacks").
Signed-off-by: Willem de Bruijn <willemb@google.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Link: https://lore.kernel.org/r/20240614122552.1649044-1-willemdebruijn.kernel@gmail.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

D. Wythe says:

====================
Introduce IPPROTO_SMC

This patch allows to create smc socket via AF_INET,
similar to the following code,

/* create v4 smc sock */
v4 = socket(AF_INET, SOCK_STREAM, IPPROTO_SMC);

/* create v6 smc sock */
v6 = socket(AF_INET6, SOCK_STREAM, IPPROTO_SMC);

There are several reasons why we believe it is appropriate here:

1. For smc sockets, it actually use IPv4 (AF-INET) or IPv6 (AF-INET6)
address. There is no AF_SMC address at all.

2. Create smc socket in the AF_INET(6) path, which allows us to reuse
the infrastructure of AF_INET(6) path, such as common ebpf hooks.
Otherwise, smc have to implement it again in AF_SMC path. Such as:
  1. Replace IPPROTO_TCP with IPPROTO_SMC in the socket() syscall
     initiated by the user, without the use of LD-PRELOAD.
  2. Select whether immediate fallback is required based on peer's port/ip
     before connect().

A very significant result is that we can now use eBPF to implement smc_run
instead of LD_PRELOAD, who is completely ineffective in scenarios of static
linking.

Another potential value is that we are attempting to optimize the
performance of fallback socks, where merging socks is an important part,
and it relies on the creation of SMC sockets under the AF_INET path.
(More information :
https://lore.kernel.org/netdev/1699442703-25015-1-git-send-email-alibuda@linux.alibaba.com/T/)

v2 -> v1:

- Code formatting, mainly including alignment and annotation repair.
- move inet_smc proto ops to inet_smc.c, avoiding af_smc.c becoming too bulky.
- Fix the issue where refactoring affects the initialization order.
- Fix compile warning (unused out_inet_prot) while CONFIG_IPV6 was not set.

v3 -> v2:

- Add Alibaba's copyright information to the newfile

v4 -> v3:

- Fix some spelling errors
- Align function naming style with smc_sock_init() to smc_sk_init()
- Reversing the order of the conditional checks on clcsock to make the code more intuitive

v5 -> v4:

- Fix some spelling errors
- Added comment, "/* CONFIG_IPV6 */", after the final #endif directive.
- Rename smc_inet.h and smc_inet.c to smc_inet.h and smc_inet.c
- Encapsulate the initialization and destruction of inet_smc in inet_smc.c,
  rather than implementing it directly in af_smc.c.
- Remove useless header files in smc_inet.h
- Make smc_inet_prot_xxx and smc_inet_sock_init() to be static, since it's
  only used in smc_inet.c

v6 -> v5:

- Wrapping lines to not exceed 80 characters
- Combine initialization and error handling of smc_inet6 into the same #if
  macro block.

v7 -> v6:

- Modify the value of IPPROTO_SMC to 256 so that it does not affect IPPROTO-MAX

v8 -> v7:

- Remove useless declarations.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

This patch allows to create smc socket via AF_INET,
similar to the following code,

/* create v4 smc sock */
v4 = socket(AF_INET, SOCK_STREAM, IPPROTO_SMC);

/* create v6 smc sock */
v6 = socket(AF_INET6, SOCK_STREAM, IPPROTO_SMC);

There are several reasons why we believe it is appropriate here:

1. For smc sockets, it actually use IPv4 (AF-INET) or IPv6 (AF-INET6)
address. There is no AF_SMC address at all.

2. Create smc socket in the AF_INET(6) path, which allows us to reuse
the infrastructure of AF_INET(6) path, such as common ebpf hooks.
Otherwise, smc have to implement it again in AF_SMC path.
Signed-off-by: D. Wythe <alibuda@linux.alibaba.com>
Reviewed-by: Wenjia Zhang <wenjia@linux.ibm.com>
Reviewed-by: Dust Li <dust.li@linux.alibaba.com>
Tested-by: Niklas Schnelle <schnelle@linux.ibm.com>
Tested-by: Wenjia Zhang <wenjia@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Externalize smc proto operations (smc_xxx) to allow
access from files other than af_smc.c

This is in preparation for the subsequent implementation
of the AF_INET version of SMC.
Signed-off-by: D. Wythe <alibuda@linux.alibaba.com>
Reviewed-by: Wenjia Zhang <wenjia@linux.ibm.com>
Reviewed-by: Dust Li <dust.li@linux.alibaba.com>
Tested-by: Niklas Schnelle <schnelle@linux.ibm.com>
Tested-by: Wenjia Zhang <wenjia@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

This patch aims to isolate the shared components of SMC socket
allocation by introducing smc_sk_init() for sock initialization
and __smc_create_clcsk() for the initialization of clcsock.

This is in preparation for the subsequent implementation of the
AF_INET version of SMC.
Signed-off-by: D. Wythe <alibuda@linux.alibaba.com>
Reviewed-by: Tony Lu <tonylu@linux.alibaba.com>
Reviewed-by: Wenjia Zhang <wenjia@linux.ibm.com>
Reviewed-by: Dust Li <dust.li@linux.alibaba.com>
Tested-by: Niklas Schnelle <schnelle@linux.ibm.com>
Tested-by: Wenjia Zhang <wenjia@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

I find the behavior of xa_for_each_start() slightly counter-intuitive.
It doesn't end the iteration by making the index point after the last
element. IOW calling xa_for_each_start() again after it "finished"
will run the body of the loop for the last valid element, instead
of doing nothing.

This works fine for netlink dumps if they terminate correctly
(i.e. coalesce or carefully handle NLM_DONE), but as we keep getting
reminded legacy dumps are unlikely to go away.

Fixing this generically at the xa_for_each_start() level seems hard -
there is no index reserved for "end of iteration".
ifindexes are 31b wide, tho, and iterator is ulong so for
for_each_netdev_dump() it's safe to go to the next element.
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Reviewed-by: Przemek Kitszel <przemyslaw.kitszel@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Joe Damato says:

====================
mlx5: Add netdev-genl queue stats

Welcome to v5.

Switched from RFC to just a v5, because I think this is pretty close.
Minor changes from v4 summarized below in the changelog.

Note that my NIC does not seem to support PTP and I couldn't get the
mlnx-tools mlnx_qos script to work, so I was only able to test the
following cases:

- device up at boot
- adjusting queue counts
- device down (e.g. ip link set dev eth4 down)

Please see the commit message of patch 2/2 for more details on output
and test cases.

rfcv4 thread:
  https://lore.kernel.org/linux-kernel/20240604004629.299699-1-jdamato@fastly.com/T/

rfcv4 -> v5:
 - Patch 1/2: change variable name 'mlx5e_qid' to 'txq_ix'.
 - Patch 2/2:
    - remove logic in mlx5e_get_queue_stats_rx for PTP. PTP RX are
      always reported in base.
    - report PTP TX in mlx5e_get_base_stats only if:
      - PTP has ever been opened, and
      - either PTP is NULL (closed) or the MLX5E_PTP_STATE_TX bit in its
        state is not set

    Otherwise, PTP TX will be reported when the txq_ix is passed into
    mlx5e_get_queue_stats_tx

rfcv3 -> rfcv4:
 - Patch 1/2 now creates a mapping (priv->txq2sq_stats) which maps txq
   indices to sq_stats structures so stats can be accessed directly.
   This mapping is kept up to date along side txq2sq.

 - Patch 2/2:
   - All mutex_lock/unlock on state_lock has been dropped.
   - mlx5e_get_queue_stats_rx now uses ASSERT_RTNL() and has a special
     case for PTP. If PTP was ever opened, is currently opened, and the
     channel index matches, stats for PTP RX are output.
   - mlx5e_get_queue_stats_tx rewritten to use priv->txq2sq_stats. No
     corner cases are needed here because any txq idx (passed in as i)
     will have an up to date mapping in priv->txq2sq_stats.
   - mlx5e_get_base_stats:
     - in the RX case:
       - iterates from [params.num_channels, stats_nch) collecting
         stats.
       - if ptp was ever opened but is currently closed, add the PTP
         stats.
     - in the TX case:
       - handle 2 cases:
         - the channel is available, so sum only the unavailable TCs
           [mlx5e_get_dcb_num_tc, max_opened_tc).
         - the channel is unavailable, so sum all TCs [0, max_opened_tc).
       - if ptp was ever opened but is currently closed, add the PTP
         sq stats.

v2 -> rfcv3:
 - Added patch 1/2 which creates some helpers for computing the txq_ix
   and ch_ix/tc_ix.

 - Patch 2/2 modified in several ways:
   - Fixed variable declarations in mlx5e_get_queue_stats_rx to be at
     the start of the function.
   - mlx5e_get_queue_stats_tx rewritten to access sq stats directly by
     using the helpers added in the previous patch.
   - mlx5e_get_base_stats modified in several ways:
     - Took the state_lock when accessing priv->channels.
     - For the base RX stats, code was simplified to call
       mlx5e_get_queue_stats_rx instead of repeating the same code.
     - For the base TX stats, I attempted to implement what I think
       Tariq suggested in the previous thread:
         - for available channels, only unavailable TC stats are summed
	 - for unavailable channels, all stats for TCs up to
	   max_opened_tc are summed.

v1 - > v2:
  - Essentially a full rewrite after comments from Jakub, Tariq, and
    Zhu.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

./cli.py --spec netlink/specs/netdev.yaml \
         --dump qstats-get --json '{"scope": "queue"}'

...snip

 {'ifindex': 7,
  'queue-id': 62,
  'queue-type': 'rx',
  'rx-alloc-fail': 0,
  'rx-bytes': 105965251,
  'rx-packets': 179790},
 {'ifindex': 7,
  'queue-id': 0,
  'queue-type': 'tx',
  'tx-bytes': 9402665,
  'tx-packets': 17551},

...snip

Also tested with the script tools/testing/selftests/drivers/net/stats.py
in several scenarios to ensure stats tallying was correct:

- on boot (default queue counts)
- adjusting queue count up or down (ethtool -L eth0 combined ...)

The tools/testing/selftests/drivers/net/stats.py brings the device up,
so to test with the device down, I did the following:

$ ip link show eth4
7: eth4: <BROADCAST,MULTICAST> mtu 9000 qdisc mq state DOWN [..snip..]
  [..snip..]

$ cat /proc/net/dev | grep eth4
eth4: 235710489  434811 [..snip rx..] 2878744 21227  [..snip tx..]

$ ./cli.py --spec ../../../Documentation/netlink/specs/netdev.yaml \
           --dump qstats-get --json '{"ifindex": 7}'
[{'ifindex': 7,
  'rx-alloc-fail': 0,
  'rx-bytes': 235710489,
  'rx-packets': 434811,
  'tx-bytes': 2878744,
  'tx-packets': 21227}]

Compare the values in /proc/net/dev match the output of cli for the same
device, even while the device is down.

Note that while the device is down, per queue stats output nothing
(because the device is down there are no queues):

$ ./cli.py --spec ../../../Documentation/netlink/specs/netdev.yaml \
           --dump qstats-get --json '{"scope": "queue", "ifindex": 7}'
[]
Signed-off-by: Joe Damato <jdamato@fastly.com>
Reviewed-by: Tariq Toukan <tariqt@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

mlx5 currently maps txqs to an sq via priv->txq2sq. It is useful to map
txqs to sq_stats, as well, for direct access to stats.

Add priv->txq2sq_stats and insert mappings. The mappings will be used
next to tabulate stats information.
Signed-off-by: Joe Damato <jdamato@fastly.com>
Reviewed-by: Tariq Toukan <tariqt@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

We only use the mapping in a single context in a short and contained scope,
so kmap_local_page is sufficient and cheaper. This will also allow
skb_datagram_iter to be called from softirq context.
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Link: https://lore.kernel.org/r/20240613113504.1079860-1-sagi@grimberg.meSigned-off-by: Jakub Kicinski <kuba@kernel.org>

Petr Machata says:

====================
mlxsw: Handle MTU values

Amit Cohen writes:

The driver uses two values for maximum MTU, but neither is accurate.
In addition, the value which is configured to hardware is not calculated
correctly. Handle these issues and expose accurate values for minimum
and maximum MTU per netdevice.

Add test cases to check that the exposed values are really supported.

Patch set overview:
Patches #1-#3 set the driver to use accurate values for MTU
Patch #4 aligns the driver to always use the same value for maximum MTU
Patch #5 adds a test
====================

Link: https://lore.kernel.org/r/cover.1718275854.git.petrm@nvidia.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

Add cases to check minimum and maximum MTU which are exposed via
"ip -d link show". Test configuration and traffic. Use VLAN devices as
usually VLAN header (4 bytes) is not included in the MTU, and drivers
should configure hardware correctly to send maximum MTU payload size
in VLAN tagged packets.

$ ./min_max_mtu.sh
TEST: ping						[ OK ]
TEST: ping6						[ OK ]
TEST: Test maximum MTU configuration			[ OK ]
TEST: Test traffic, packet size is maximum MTU		[ OK ]
TEST: Test minimum MTU configuration			[ OK ]
TEST: Test traffic, packet size is minimum MTU		[ OK ]
Signed-off-by: Amit Cohen <amcohen@nvidia.com>
Reviewed-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: Petr Machata <petrm@nvidia.com>
Link: https://lore.kernel.org/r/89de8be8989db7a97f3b39e3c9da695673e78d2e.1718275854.git.petrm@nvidia.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

Currently, the driver uses two different values for maximum MTU, one is
stored in mlxsw_port->dev->max_mtu and the second is stored in
mlxsw_port->max_mtu. The second one is set to value which is queried from
firmware. This value was never tested, and unfortunately is not really
supported. That means that with the existing code, user can set MTU to
X, which is not really supported by firmware and which is bigger than
buffer size which is allocated in pci.

To make the driver consistent, use only mlxsw_port->dev->max_mtu for
maximum MTU value, for buffers headroom add Ethernet frame headers, which
are not included in mlxsw_port->dev->max_mtu. Remove mlxsw_port->max_mtu.
Signed-off-by: Amit Cohen <amcohen@nvidia.com>
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: Petr Machata <petrm@nvidia.com>
Link: https://lore.kernel.org/r/89fa6f804386b918d337e736e14ac291bb947483.1718275854.git.petrm@nvidia.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

Currently, the driver uses ETH_MAX_MTU as maximum MTU of netdevices,
instead, use the accurate value which is supported by the driver.
Subtract Ethernet headers which are taken into account by hardware for
MTU checking, as described in the previous patch.

Set minimum MTU to ETH_MIN_MTU, as zero MTU is not really supported.

With this change:
a. The stack will do the MTU checking, so we can remove it from the driver.
b. User space will be able to query the actual MTU limits.
   Before this patch:
   $ ip -j -d link show dev swp1 | jq | grep mtu
    "mtu": 1500,
    "min_mtu": 0,
    "max_mtu": 65535,

   With this patch:
   $ ip -j -d link show dev swp1 | jq | grep mtu
    "mtu": 1500,
    "min_mtu": 68,
    "max_mtu": 10218,
Signed-off-by: Amit Cohen <amcohen@nvidia.com>
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: Petr Machata <petrm@nvidia.com>
Link: https://lore.kernel.org/r/be8232e38c196ecb607f82c5e000ea427ce22abb.1718275854.git.petrm@nvidia.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

Ethernet frame consists of - Ethernet header, payload, FCS. The MTU value
which is used by user is the size of the payload, which means that when
user sets MTU to X, the total frame size will be larger due to the addition
of the Ethernet header and FCS.

Spectrum ASICs take into account Ethernet header and FCS as part of packet
size for MTU check. Adjust MTU value when user sets MTU, to configure the
MTU size which is required by hardware. The Tx header length which was used
by the driver is not relevant for such calculation, take into account
Ethernet header (with VLAN extension) and FCS.
Signed-off-by: Amit Cohen <amcohen@nvidia.com>
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: Petr Machata <petrm@nvidia.com>
Link: https://lore.kernel.org/r/f3203c2477bb8ed18b1e79642fa3e3713e1e55bb.1718275854.git.petrm@nvidia.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

Currently mlxsw driver supports up to 10000 bytes for maximum MTU, this
value is not accurate, we can support up to 10K bytes. Change the value to
the maximum supported MTU by firmware.
Signed-off-by: Amit Cohen <amcohen@nvidia.com>
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: Petr Machata <petrm@nvidia.com>
Link: https://lore.kernel.org/r/666f51681234aeef09d771833ccb6e94bd323c88.1718275854.git.petrm@nvidia.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

Unlike copy_from_user(), put_user() and get_user() return -EFAULT on
error.  Use the error code directly instead of setting it.
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Link: https://lore.kernel.org/r/04a018e8-7433-4f67-8ddd-9357a0114f87@moroto.mountainSigned-off-by: Jakub Kicinski <kuba@kernel.org>

Russell King says:

====================
net: stmmac: provide platform select_pcs method

This series adds a select_pcs() method to the stmmac platform data to
allow platforms that need to provide their own PCSes to do so, moving
the decision making into platform code.

This avoids questions such as "what should the priority of XPCS vs
some other platform PCS be?" and when we provide a PCS for the
internal PCS, how that interacts with both the XPCS and platform
provided PCS.

Note that if a platform implements the select_pcs() method, then the
return values are:
- a phylink_pcs pointer - the PCS to be used.
- NULL - no phylink_pcs to be used.
Otherwise (if not implemented or returns an error-pointer), then
allow the the stmmac internal PCS to be used if appropriate (once
that patch set is merged.)

Patch 1 introduces the new method.
Patch 2 converts Intel mGBE to use this to provide the XPCS and
 removes the XPCS decision making from core code.
Patch 3 provides an implementation for rzn1 to return its PCS.
Patch 4 does the same for socfpga.
Patch 5 removes the core code returning priv->hw->phylink_pcs.

No functional change is anticipated. Once this has been merged, it
will be expected that platforms should populate all three PCS
methods or none of the PCS methods.
====================

Link: https://lore.kernel.org/r/ZmrLbdwv6ALoy+gs@shell.armlinux.org.ukSigned-off-by: Jakub Kicinski <kuba@kernel.org>

Since all platform providers of PCS now populate the select_pcs()
method, there is no need for the common code to look at
priv->hw->phylink_pcs, so remove it.
Reviewed-by: Romain Gantois <romain.gantois@bootlin.com>
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Link: https://lore.kernel.org/r/E1sHhoh-00FetT-3S@rmk-PC.armlinux.org.ukSigned-off-by: Jakub Kicinski <kuba@kernel.org>

Provide a .select_pcs() implementation which returns the phylink PCS
that was created in the .pcs_init() method.
Reviewed-by: Romain Gantois <romain.gantois@bootlin.com>
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Link: https://lore.kernel.org/r/E1sHhob-00FetN-Vp@rmk-PC.armlinux.org.ukSigned-off-by: Jakub Kicinski <kuba@kernel.org>

Provide a .select_pcs() implementation which returns the phylink PCS
that was created in the .pcs_init() method.
Tested-by: Romain Gantois <romain.gantois@bootlin.com>
Reviewed-by: Romain Gantois <romain.gantois@bootlin.com>
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Link: https://lore.kernel.org/r/E1sHhoW-00FetH-GD@rmk-PC.armlinux.org.ukSigned-off-by: Jakub Kicinski <kuba@kernel.org>

Move the code returning the XPCS into dwmac-intel, which is the only
user of XPCS. Fill in the select_pcs() implementation only when we are
going to setup the XPCS, thus when it should be present.
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Link: https://lore.kernel.org/r/E1sHhoR-00FetB-CP@rmk-PC.armlinux.org.ukSigned-off-by: Jakub Kicinski <kuba@kernel.org>

Allow platform drivers to provide their logic to select an appropriate
PCS.
Tested-by: Romain Gantois <romain.gantois@bootlin.com>
Reviewed-by: Romain Gantois <romain.gantois@bootlin.com>
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Link: https://lore.kernel.org/r/E1sHhoM-00Fesu-8E@rmk-PC.armlinux.org.ukSigned-off-by: Jakub Kicinski <kuba@kernel.org>

Tariq Toukan says:

====================
mlx5 misc patches 2023-06-13

This patchset contains small code cleanups and enhancements from the
team to the mlx5 core and Eth drivers.

Series generated against:
commit 3ec8d757 ("CDC-NCM: add support for Apple's private interface")
====================

Link: https://lore.kernel.org/r/20240613210036.1125203-1-tariqt@nvidia.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

Calculate the pseudo-header checksum for both IPSec transport mode and
IPSec tunnel mode for mlx5 devices that do not implement a pure hardware
checksum offload for L4 checksum calculation. Introduce a capability bit
that identifies such mlx5 devices.
Signed-off-by: Rahul Rameshbabu <rrameshbabu@nvidia.com>
Reviewed-by: Gal Pressman <gal@nvidia.com>
Reviewed-by: Cosmin Ratiu <cratiu@nvidia.com>
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Link: https://lore.kernel.org/r/20240613210036.1125203-7-tariqt@nvidia.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

Use the tcp specific helpers to calculate the tcp pseudo header checksum
instead of the csum_*_magic ones.
Signed-off-by: Gal Pressman <gal@nvidia.com>
Reviewed-by: Rahul Rameshbabu <rrameshbabu@nvidia.com>
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Link: https://lore.kernel.org/r/20240613210036.1125203-6-tariqt@nvidia.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

The code no longer treats only UDP tunnels, adjust the outdated comment.
Signed-off-by: Gal Pressman <gal@nvidia.com>
Reviewed-by: Cosmin Ratiu <cratiu@nvidia.com>
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Link: https://lore.kernel.org/r/20240613210036.1125203-5-tariqt@nvidia.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

Replace deprecated strcpy with strscpy.
Signed-off-by: Moshe Shemesh <moshe@nvidia.com>
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Link: https://lore.kernel.org/r/20240613210036.1125203-4-tariqt@nvidia.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

Currently a ct entry is stored in both ct and ct-nat tables. ct
action is directed to the ct table, while ct nat action is directed
to the nat table. ct-nat entries perform the nat header rewrites,
if required. The current design assures that a ct action will match
in hardware even if the tuple has nat configured, it will just not
execute it. However, storing each connection in two tables increases
the system's memory consumption while reducing its insertion rate.

Offload a connection to either ct or the ct-nat table. Add a miss
fall-through rule from ct-nat table to the ct table allowing ct(nat)
action on non-natted connections.

ct action on natted connections, by default, will be handled by the
software miss path.
Signed-off-by: Paul Blakey <paulb@nvidia.com>
Signed-off-by: Chris Mi <cmi@nvidia.com>
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Link: https://lore.kernel.org/r/20240613210036.1125203-3-tariqt@nvidia.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

TSAR is the correct spelling (Transmit Scheduling ARbiter).
Signed-off-by: Cosmin Ratiu <cratiu@nvidia.com>
Reviewed-by: Gal Pressman <gal@nvidia.com>
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Link: https://lore.kernel.org/r/20240613210036.1125203-2-tariqt@nvidia.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

The Realtek RTL8224 PHY is a 2.5Gbps capable PHY. It only uses the
clause 45 MDIO interface and can leverage the support that has already
been added for the other 822x PHYs.
Signed-off-by: Chris Packham <chris.packham@alliedtelesis.co.nz>
Link: https://lore.kernel.org/r/20240611053415.2111723-1-chris.packham@alliedtelesis.co.nzSigned-off-by: Jakub Kicinski <kuba@kernel.org>

Commit 12c2d0a5 ("net: lan966x: add ethtool configuration and statistics")
added support for various standard stats. We should not clear the stats
which are not collected by the device. Core code uses a special
initializer to detect when device does not report given stat.
Acked-by: Horatiu Vultur <horatiu.vultur@microchip.com>
Link: https://lore.kernel.org/r/20240613003222.3327368-1-kuba@kernel.orgSigned-off-by: Jakub Kicinski <kuba@kernel.org>

Ignore the ENODEV failures returned by kernel_sendmsg(). These errors
indicate that either the local port has been closed or the remote has
gone down. Neither of these scenarios are fatal and will eventually be
handled through packets that are later queued on the control port.
Signed-off-by: Chris Lew <quic_clew@quicinc.com>
Signed-off-by: Sarannya Sasikumar <quic_sarannya@quicinc.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://lore.kernel.org/r/20240612063156.1377210-1-quic_sarannya@quicinc.comSigned-off-by: Paolo Abeni <pabeni@redhat.com>

Christophe Roullier says:

====================
Series to deliver Ethernet for STM32MP13

STM32MP13 is STM32 SOC with 2 GMACs instances
    GMAC IP version is SNPS 4.20.
    GMAC IP configure with 1 RX and 1 TX queue.
    DMA HW capability register supported
    RX Checksum Offload Engine supported
    TX Checksum insertion supported
    Wake-Up On Lan supported
    TSO supported
Rework dwmac glue to simplify management for next stm32 (integrate RFC from Marek)

V2: - Remark from Rob Herring (add Krzysztof's ack in patch 02/11, update in yaml)
      Remark from Serge Semin (upate commits msg)
V3: - Remove PHY regulator patch and Ethernet2 DT because need to clarify how to
      manage PHY regulator (in glue or PHY side)
    - Integrate RFC from Marek
    - Remark from Rob Herring in YAML documentation
V4: - Remark from Marek (remove max-speed, extra space in DT, update commit msg)
    - Remark from Rasmus (add sign-off, add base-commit)
    - Remark from Sai Krishna Gajula
V5: - Fix warning during build CHECK_DTBS
    - Remark from Marek (glue + DT update)
    - Remark from Krzysztof about YAML (Make it symmetric)
V6: - Replace pr_debug by dev_dbg
    - Split serie driver/DTs separately
V7: - Remark from Marek (update sysconfig register mask)
====================

Link: https://lore.kernel.org/r/20240611083606.733453-1-christophe.roullier@foss.st.comSigned-off-by: Paolo Abeni <pabeni@redhat.com>

Add Ethernet support for STM32MP13.
STM32MP13 is STM32 SOC with 2 GMACs instances.
GMAC IP version is SNPS 4.20.
GMAC IP configure with 1 RX and 1 TX queue.
DMA HW capability register supported
RX Checksum Offload Engine supported
TX Checksum insertion supported
Wake-Up On Lan supported
TSO supported
Signed-off-by: Christophe Roullier <christophe.roullier@foss.st.com>
Reviewed-by: Marek Vasut <marex@denx.de>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

Add possibility to have second argument in syscon property to manage
mask. This mask will be used to address right BITFIELDS of PMCR register.
Signed-off-by: Christophe Roullier <christophe.roullier@foss.st.com>
Reviewed-by: Marek Vasut <marex@denx.de>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

Trivial, fix up the comments using 'Mhz' to 'MHz'.
No functional change.
Signed-off-by: Marek Vasut <marex@denx.de>
Signed-off-by: Christophe Roullier <christophe.roullier@foss.st.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

Use dev_err()/dev_dbg() and phy_modes() to print PHY mode instead of
pr_debug() and hand-written PHY mode decoding. This way, each debug
print has associated device with it and duplicated mode decoding is
removed.
Signed-off-by: Marek Vasut <marex@denx.de>
Signed-off-by: Christophe Roullier <christophe.roullier@foss.st.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>