Commit Graph

1396898 Commits

Author SHA1 Message Date
Lorenzo Bianconi
6d5b601d52 net: airoha: ppe: Dynamically allocate foe_check_time array in airoha_ppe struct
This is a preliminary patch to properly enable PPE support for AN7583
SoC.

Reviewed-by: Simon Horman <horms@kernel.org>
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Link: https://patch.msgid.link/20251017-an7583-eth-support-v3-2-f28319666667@kernel.org
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
2025-10-21 13:07:04 +02:00
Lorenzo Bianconi
51538c0c9d dt-bindings: net: airoha: Add AN7583 support
Introduce AN7583 ethernet controller support to Airoha EN7581
device-tree bindings. The main difference between EN7581 and AN7583 is
the number of reset lines required by the controller (AN7583 does not
require hsi-mac).

Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Reviewed-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://patch.msgid.link/20251017-an7583-eth-support-v3-1-f28319666667@kernel.org
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
2025-10-21 13:07:04 +02:00
Paolo Abeni
3dc835a66e Merge branch 'networking-docs-section-headings-cleanup'
Bagas Sanjaya says:

====================
networking docs section headings cleanup

Just two net docs patches cleaning up section headings. The shortlog below
should be self-explanatory.
====================

Link: https://patch.msgid.link/20251017064525.28836-2-bagasdotme@gmail.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
2025-10-21 10:57:47 +02:00
Bagas Sanjaya
97aa8ecb57 net: 6pack: Demote "How to turn on 6pack support" section heading
"How to turn on 6pack support" is a subsection of "Building and
installing the 6pack driver". Yet, the former is in the same heading
level as the latter as sections, making it listed in networking docs
toctree.

Demote it to subsection.

Signed-off-by: Bagas Sanjaya <bagasdotme@gmail.com>
Link: https://patch.msgid.link/20251017064525.28836-4-bagasdotme@gmail.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
2025-10-21 10:57:45 +02:00
Bagas Sanjaya
122d696c17 net: nfc: Format userspace interface subsection headings
Subsection headings of "Userspace interface" is written in normal
paragraph, all-capped. Properly format them as reST section headings.

Signed-off-by: Bagas Sanjaya <bagasdotme@gmail.com>
Link: https://patch.msgid.link/20251017064525.28836-3-bagasdotme@gmail.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
2025-10-21 10:57:45 +02:00
Jakub Kicinski
ebc742edc9 linux-can-next-for-6.19-20251017
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Merge tag 'linux-can-next-for-6.19-20251017' of git://git.kernel.org/pub/scm/linux/kernel/git/mkl/linux-can-next

Marc Kleine-Budde says:

====================
pull-request: can-next 2025-10-17

The first patch is by me and adds support for an optional reset to the
m_can drivers.

Vincent Mailhol's patch targets all drivers and removes the
can_change_mtu() function, since the netdev's min and max MTU are
populated.

Markus Schneider-Pargmann contributes 4 patches to the m_can driver to
add am62 wakeup support.

The last 7 patches are by me and provide various cleanups to the m_can
driver.

* tag 'linux-can-next-for-6.19-20251017' of git://git.kernel.org/pub/scm/linux/kernel/git/mkl/linux-can-next:
  can: m_can: m_can_get_berr_counter(): don't wake up controller if interface is down
  can: m_can: m_can_tx_submit(): remove unneeded sanity checks
  can: m_can: m_can_class_register(): remove error message in case devm_kzalloc() fails
  can: m_can: m_can_interrupt_enable(): use m_can_write() instead of open coding it
  net: m_can: convert dev_{dbg,info,err} -> netdev_{dbg,info,err}
  can: m_can: hrtimer_callback(): rename to m_can_polling_timer()
  can: m_can: m_can_init_ram(): make static
  can: m_can: Support pinctrl wakeup state
  can: m_can: Return ERR_PTR on error in allocation
  can: m_can: Map WoL to device_set_wakeup_enable
  dt-bindings: can: m_can: Add wakeup properties
  can: treewide: remove can_change_mtu()
  can: m_can: add support for optional reset
====================

Link: https://patch.msgid.link/20251017150819.1415685-1-mkl@pengutronix.de
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-10-20 18:36:17 -07:00
Aswin Karuvally
38516e3fa4 s390/iucv: Convert sprintf/snprintf to scnprintf
Convert sprintf/snprintf calls to scnprintf to better align with the
kernel development community practices [1].

Link: https://lwn.net/Articles/69419 [1]
Reviewed-by: Alexandra Winter <wintera@linux.ibm.com>
Signed-off-by: Aswin Karuvally <aswin@linux.ibm.com>
Signed-off-by: Alexandra Winter <wintera@linux.ibm.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20251017094954.1402684-1-wintera@linux.ibm.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-10-20 18:35:21 -07:00
Jakub Kicinski
baa515ef82 Merge branch 'intel-wired-lan-driver-updates-2025-10-15-ice-iavf-ixgbe-i40e-e1000e'
Jacob Keller says:

====================
Intel Wired LAN Driver Updates 2025-10-15 (ice, iavf, ixgbe, i40e, e1000e) [part]

Jacob revives one-year-old work from Jesse Brandeburg to implement the
standardized statistics interfaces from ethtool in the ice driver.

Vitaly introduces a new private flag to control the K1 power state of ICH
network controllers supported by the e1000e driver. This flag has been
extensively discussed on the list and deemed the best available option to
provide a field workaround without impacting the many configurations that
have no issues with the K1 power state.
====================

Link: https://patch.msgid.link/20251016-jk-iwl-next-2025-10-15-v2-0-ff3a390d9fc6@intel.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-10-20 18:34:14 -07:00
Vitaly Lifshits
3c7bf5af21 e1000e: Introduce private flag to disable K1
The K1 state reduces power consumption on ICH family network controllers
during idle periods, similarly to L1 state on PCI Express NICs. Therefore,
it is recommended and enabled by default.
However, on some systems it has been observed to have adverse side
effects, such as packet loss. It has been established through debug that
the problem may be due to firmware misconfiguration of specific systems,
interoperability with certain link partners, or marginal electrical
conditions of specific units.

These problems typically cannot be fixed in the field, and generic
workarounds to resolve the side effects on all systems, while keeping K1
enabled, were found infeasible.
Therefore, add the option for users to globally disable K1 idle state on
the adapter.

Additionally, disable K1 by default for MTL and later platforms, due to
issues reported with the current configuration.

Link: https://lore.kernel.org/intel-wired-lan/CAMqyJG3LVqfgqMcTxeaPur_Jq0oQH7GgdxRuVtRX_6TTH2mX5Q@mail.gmail.com/
Link: https://lore.kernel.org/intel-wired-lan/20250626153544.1853d106@onyx.my.domain/
Link: https://lore.kernel.org/intel-wired-lan/Z_z9EjcKtwHCQcZR@mail-itl/
Link: https://github.com/QubesOS/qubes-issues/issues/9896
Link: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2115393

Signed-off-by: Vitaly Lifshits <vitaly.lifshits@intel.com>
Reviewed-by: Timo Teräs <timo.teras@iki.fi>
Tested-by: Timo Teräs <timo.teras@iki.fi>
Reviewed-by: Aleksandr Loktionov <aleksandr.loktionov@intel.com>
Reviewed-by: Dima Ruinskiy <dima.ruinskiy@intel.com>
Tested-by: Avraham Koren <Avrahamx.koren@intel.com>
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Link: https://patch.msgid.link/20251016-jk-iwl-next-2025-10-15-v2-14-ff3a390d9fc6@intel.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-10-20 18:31:26 -07:00
Jesse Brandeburg
a308ea9721 ice: refactor to use helpers
Use the ice_netdev_to_pf() helper in more places and remove a bunch of
boilerplate code. Not every instance could be replaced due to use of the
netdev_priv() output or the vsi variable within a bunch of functions.

Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Reviewed-by: Przemek Kitszel <przemyslaw.kitszel@intel.com>
Reviewed-by: Aleksandr Loktionov <aleksandr.loktionov@intel.com>
Tested-by: Rinitha S <sx.rinitha@intel.com>
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Link: https://patch.msgid.link/20251016-jk-iwl-next-2025-10-15-v2-12-ff3a390d9fc6@intel.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-10-20 18:31:26 -07:00
Jesse Brandeburg
71462475d0 ice: implement transmit hardware timestamp statistics
The kernel now has common statistics for transmit timestamps, so
implement them in the ice driver.

use via
ethtool -I -T eth0

Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Reviewed-by: Jakub Kicinski <kuba@kernel.org>
Reviewed-by: Hariprasad Kelam <hkelam@marvell.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Tested-by: Rinitha S <sx.rinitha@intel.com>
Reviewed-by: Aleksandr Loktionov <aleksandr.loktionov@intel.com>
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Link: https://patch.msgid.link/20251016-jk-iwl-next-2025-10-15-v2-11-ff3a390d9fc6@intel.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-10-20 18:31:25 -07:00
Jesse Brandeburg
4368d5fe02 ice: add tracking of good transmit timestamps
As a pre-requisite to implementing timestamp statistics, start tracking
successful PTP timestamps. There already existed a trace event, but
add a counter as well so it can be displayed by the next patch.

Good count is a u64 as it is much more likely to be incremented. The
existing error stats are all u32 as before, and are less likely so will
wrap less.

Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Reviewed-by: Jakub Kicinski <kuba@kernel.org>
Reviewed-by: Simon Horman <horms@kernel.org>
Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Tested-by: Rinitha S <sx.rinitha@intel.com>
Reviewed-by: Aleksandr Loktionov <aleksandr.loktionov@intel.com>
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Link: https://patch.msgid.link/20251016-jk-iwl-next-2025-10-15-v2-10-ff3a390d9fc6@intel.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-10-20 18:31:25 -07:00
Jesse Brandeburg
20ae87514a ice: implement ethtool standard stats
Add support for MAC/pause/RMON stats. This enables reporting hardware
statistics in a common way via:

ethtool -S eth0 --all-groups
and
ethtool --include-statistics --show-pause eth0

While doing so, add support for one new stat, receive length error
(RLEC), which is extremely unlikely to happen since most L2 frames have
a type/length field specifying a "type", and raw ethernet frames aren't
used much any longer.

NOTE: I didn't implement Ctrl aka control frame stats because the
hardware doesn't seem to implement support.

Reviewed-by: Marcin Szycik <marcin.szycik@linux.intel.com>
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Reviewed-by: Jakub Kicinski <kuba@kernel.org>
Reviewed-by: Simon Horman <horms@kernel.org>
Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Tested-by: Rinitha S <sx.rinitha@intel.com>
Reviewed-by: Aleksandr Loktionov <aleksandr.loktionov@intel.com>
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Link: https://patch.msgid.link/20251016-jk-iwl-next-2025-10-15-v2-9-ff3a390d9fc6@intel.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-10-20 18:31:25 -07:00
Jesse Brandeburg
98c2f0b42e net: docs: add missing features that can have stats
While trying to figure out ethtool -I | --include-statistics, I noticed
some docs got missed when implementing commit 0e9c127729 ("ethtool:
add interface to read Tx hardware timestamping statistics").

Fix up the docs to match the kernel code, and while there, sort them in
alphabetical order.

Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Reviewed-by: Rahul Rameshbabu <rrameshbabu@nvidia.com>
Reviewed-by: Jakub Kicinski <kuba@kernel.org>
Reviewed-by: Simon Horman <horms@kernel.org>
Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Reviewed-by: Paul Menzel <pmenzel@molgen.mpg.de>
Reviewed-by: Aleksandr Loktionov <aleksandr.loktionov@intel.com>
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Link: https://patch.msgid.link/20251016-jk-iwl-next-2025-10-15-v2-8-ff3a390d9fc6@intel.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-10-20 18:31:25 -07:00
Ankit Garg
c30fd916c4 gve: Consolidate and persist ethtool ring changes
Refactor the ethtool ring parameter configuration logic to address two
issues: unnecessary queue resets and lost configuration changes when
the interface is down.

Previously, `gve_set_ringparam` could trigger multiple queue
destructions and recreations for a single command, as different settings
(e.g., header split, ring sizes) were applied one by one. Furthermore,
if the interface was down, any changes made via ethtool were discarded
instead of being saved for the next time the interface was brought up.

This patch centralizes the configuration logic. Individual functions
like `gve_set_hsplit_config` are modified to only validate and stage
changes in a temporary config struct.

The main `gve_set_ringparam` function now gathers all staged changes
and applies them as a single, combined configuration:
1.  If the interface is up, it calls `gve_adjust_config` once.
2.  If the interface is down, it saves the settings directly to the
    driver's private struct, ensuring they persist and are used when
    the interface is brought back up.

Signed-off-by: Ankit Garg <nktgrg@google.com>
Reviewed-by: Harshitha Ramamurthy <hramamurthy@google.com>
Reviewed-by: Jordan Rhee <jordanrhee@google.com>
Reviewed-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: Joshua Washington <joshwash@google.com>
Link: https://patch.msgid.link/20251017012614.3631351-1-joshwash@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-10-20 17:43:23 -07:00
Eric Dumazet
a5cd3a60aa net: shrink napi_skb_cache_{put,get}() and napi_skb_cache_get_bulk()
Following loop in napi_skb_cache_put() is unrolled by the compiler
even if CONFIG_KASAN is not enabled:

for (i = NAPI_SKB_CACHE_HALF; i < NAPI_SKB_CACHE_SIZE; i++)
	kasan_mempool_unpoison_object(nc->skb_cache[i],
				kmem_cache_size(net_hotdata.skbuff_cache));

We have 32 times this sequence, for a total of 384 bytes.

	48 8b 3d 00 00 00 00 	net_hotdata.skbuff_cache,%rdi
	e8 00 00 00 00       	call   kmem_cache_size

This is because kmem_cache_size() is not an inline and not const,
and kasan_unpoison_object_data() is an inline function.

Cache kmem_cache_size() result in a variable, so that
the compiler can remove dead code (and variable) when/if
CONFIG_KASAN is unset.

After this patch, napi_skb_cache_put() is inlined in its callers,
and we avoid one kmem_cache_size() call in napi_skb_cache_get()
and napi_skb_cache_get_bulk().

Signed-off-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Reviewed-by: Kuniyuki Iwashima <kuniyu@google.com>
Reviewed-by: Alexander Lobakin <aleksander.lobakin@intel.com>
Link: https://patch.msgid.link/20251016182911.1132792-1-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-10-20 17:37:57 -07:00
Jakub Kicinski
6ae022f8ac Merge branch 'convert-net-drivers-to-ndo_hwtstamp-api-part-1'
Vadim Fedorenko says:

====================
convert net drivers to ndo_hwtstamp API part 1

This is part 1 of patchset to convert drivers which support HW
timestamping to use .ndo_hwtstamp_get()/.ndo_hwtstamp_set() callbacks.
The new API uses netlink to communicate with user-space and have some
test coverage. Part 2 will contain another 6 patches from v1 of the
series.
There are some drivers left with old ioctl interface after this series:
- mlx5 driver be shortly converted by nVidia folks
- TI netcp ethss driver which needs separate series which I'll post
  after this one.
====================

Link: https://patch.msgid.link/20251016152515.3510991-1-vadim.fedorenko@linux.dev
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-10-20 17:30:28 -07:00
Vadim Fedorenko
dc34040654 funeth: convert to ndo_hwtstamp API
Convert driver to use .ndo_hwtstamp_get()/.ndo_hwtstamp_set() callbacks.
.ndo_eth_ioctl() implementation becomes empty, remove it.

Reviewed-by: Simon Horman <horms@kernel.org>
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Signed-off-by: Vadim Fedorenko <vadim.fedorenko@linux.dev>
Link: https://patch.msgid.link/20251016152515.3510991-8-vadim.fedorenko@linux.dev
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-10-20 17:30:26 -07:00
Vadim Fedorenko
d8db98db0d tsnep: convert to ndo_hwtstatmp API
Convert to .ndo_hwtstamp_get()/.ndo_hwtstamp_set() callbacks.
After conversions the rest of tsnep_netdev_ioctl() becomes pure
phy_do_ioctl_running(), so remove tsnep_netdev_ioctl() and replace
it with phy_do_ioctl_running() in .ndo_eth_ioctl.

Reviewed-by: Simon Horman <horms@kernel.org>
Signed-off-by: Vadim Fedorenko <vadim.fedorenko@linux.dev>
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Reviewed-by: Gerhard Engleder <gerhard@engleder-embedded.com>
Link: https://patch.msgid.link/20251016152515.3510991-7-vadim.fedorenko@linux.dev
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-10-20 17:30:26 -07:00
Vadim Fedorenko
a6a64bb411 cxgb4: convert to ndo_hwtstamp API
Convert to use .ndo_hwtstamp_get()/.ndo_hwtstamp_set() callbacks.

There is some change in the logic as well. Previously, the driver was
storing newly requested configuration regardless of whether it was
applied or not. In case of request validation error, inconsistent
configuration would be returned by the driver. New logic stores
configuration only if was properly validated and applied. It brings the
consistency between reported and actual configuration.

Signed-off-by: Vadim Fedorenko <vadim.fedorenko@linux.dev>
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Link: https://patch.msgid.link/20251016152515.3510991-6-vadim.fedorenko@linux.dev
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-10-20 17:30:26 -07:00
Vadim Fedorenko
8a15a84e80 net: atlantic: convert to ndo_hwtstamp API
Convert driver to .ndo_hwtstamp_get()/.ndo_hwtstamp_set() callbacks.
.ndo_eth_ioctl() becomes empty so remove it. Also simplify code with no
functional changes.

Reviewed-by: Simon Horman <horms@kernel.org>
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Signed-off-by: Vadim Fedorenko <vadim.fedorenko@linux.dev>
Link: https://patch.msgid.link/20251016152515.3510991-5-vadim.fedorenko@linux.dev
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-10-20 17:30:26 -07:00
Vadim Fedorenko
149cfae711 amd-xgbe: convert to ndo_hwtstamp callbacks
Convert driver to use .ndo_hwtstamp_get()/.ndo_hwtstamp_set() callbacks.
.ndo_eth_ioctl() becomes empty function, remove it.

Reviewed-by: Simon Horman <horms@kernel.org>
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Signed-off-by: Vadim Fedorenko <vadim.fedorenko@linux.dev>
Link: https://patch.msgid.link/20251016152515.3510991-4-vadim.fedorenko@linux.dev
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-10-20 17:30:26 -07:00
Vadim Fedorenko
b8fa98ea4a ti: icssg: convert to ndo_hwtstamp API
Convert driver to use .ndo_hwtstamp_get()/.ndo_hwtstamp_set() API.
.ndo_eth_ioctl() implementation becomes pure phy_do_ioctl(), remove
it from common module, remove exported symbol and replace ndo callback.

Reviewed-by: Simon Horman <horms@kernel.org>
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Signed-off-by: Vadim Fedorenko <vadim.fedorenko@linux.dev>
Link: https://patch.msgid.link/20251016152515.3510991-3-vadim.fedorenko@linux.dev
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-10-20 17:30:25 -07:00
Vadim Fedorenko
ed5d5928bd net: ti: am65-cpsw: move hw timestamping to ndo callback
Migrate driver to new API for HW timestamping.

Reviewed-by: Simon Horman <horms@kernel.org>
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Signed-off-by: Vadim Fedorenko <vadim.fedorenko@linux.dev>
Link: https://patch.msgid.link/20251016152515.3510991-2-vadim.fedorenko@linux.dev
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-10-20 17:30:25 -07:00
Jakub Kicinski
6117dc5c88 Merge branch 'net-stmmac-phylink-pcs-conversion'
Russell King says:

====================
net: stmmac: phylink PCS conversion

This series is radical - it takes the brave step of ripping out much of
the existing PCS support code and throwing it all away.

I have discussed the introduction of the STMMAC_FLAG_HAS_INTEGRATED_PCS
flag with Bartosz Golaszewski, and the conclusion I came to is that
this is to workaround the breakage that I've been going on about
concerning the phylink conversion for the last five or six years.

The problem is that the stmmac PCS code manipulates the netif carrier
state, which confuses phylink.

There is a way of testing this out on the Jetson Xavier NX platform as
the "PCS" code paths can be exercised while in RGMII mode - because
RGMII also has in-band status and the status register is shared with
SGMII. Testing this out confirms my long held theory: the interrupt
handler manipulates the netif carrier state before phylink gets a
look-in, which means that the mac_link_up() and mac_link_down() methods
are never called, resulting in the device being non-functional.

Moreover, on dwmac4 cores, ethtool reports incorrect information -
despite having a full-duplex link, ethtool reports that it is
half-dupex.

Thus, this code is completely broken - anyone using it will not have
a functional platform, and thus it doesn't deserve to live any longer,
especially as it's a thorn in phylink.

Rip all this out, leaving just the bare bones initialisation in place.

However, this is not the last of what's broken. We have this hw->ps
integer which is really not descriptive, and the DT property from
which it comes from does little to help understand what's going on.
Putting all the clues together:

- early configuration of the GMAC configuration register for the
  speed.
- setting the SGMII rate adapter layer to take its speed from the
  GMAC configuration register.

Lastly, setting the transmit enable (TE) bit, which is a typo that puts
the nail in the coffin of this code. It should be the transmit
configuration (TC) bit. Given that when the link comes up, phylink
will call mac_link_up() which will overwrite the speed in the GMAC
configuration register, the only part of this that is functional is
changing where the SGMII rate adapter layer gets its speed from,
which is a boolean.

From what I've found so far, everyone who sets the snps,ps-speed
property which configures this mode also configures a fixed link,
so the pre-configuration is unnecessary - the link will come up
anyway.

So, this series rips that out the preconfiguration as well, and
replaces hw->ps with a boolean hw->reverse_sgmii_enable flag.

We then move the sole PCS configuration into a phylink_pcs instance,
which configures the PCS control register in the same way as is done
during the probe function.

Thus, we end up with much easier and simpler conversion to phylink PCS
than previous attempts.

Even so, this still results in inband mode always being enabled at
the moment in the new .pcs_config() method to reflect what the probe
function was doing. The next stage will be to change that to allow
phylink to correctly configure the PCS. This needs fixing to allow
platform glue maintainers who are currently blocked to progress.

Please note, however, that this has not been tested with any SGMII
platform.

I've tried to get as many people into the Cc list with get_maintainers,
I hope that's sufficient to get enough eyeballs on this.

Changes since RFC:
- new patch (7) to remove RGMII "pcs" mode
- new patch (8) to move reverse "pcs" mode to stmmac_check_pcs_mode()
- new patch (9) to simplify the code moved in the previous patch
- new patch (10) to rename the confusing hw->ps to something more
  understandable.
- new patch (11) to shut up inappropriate complaints about
  "snps,ps-speed" being invalid.
- new patch (13) to add a MAC .pcs_init method, which will only be
  called when core has PCS present.
- modify patch 14 to use this new pcs_init method.

Despite getting a couple of responses to the RFC series posted in
September, I have had nothing testing this on hardware. I have tested
this on the Jetson Xavier NX, which included trial runs with enabling
the RGMII "pcs" mode, hence the new patches that rip out this mode. I
have come to the conclusion that the only way to get stmmac changes
tested is to get them merged into net-next, thereby forcing people to
have to run with them... and we'll deal with any fallout later.
====================

Link: https://patch.msgid.link/aPECqg0vZGnBFCbh@shell.armlinux.org.uk
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-10-20 17:17:23 -07:00
Russell King (Oracle)
2c81f33571 net: stmmac: convert to phylink PCS support
Now that stmmac's PCS support is much more simple - just a matter of
configuring the control register - the basic conversion to phylink PCS
support becomes straight forward.

Create the infrastructure to setup a phylink_pcs instance for the
integrated PCS:
- add a struct stmmac_pcs to encapsulate the phylink_pcs structure,
  pointer to stmmac_priv, and the core-specific base address of the PCS
  registers.
- modify stmmac_priv and stmmac_mac_select_pcs() to return the embedded
  phylink_pcs structure when setup and STMMAC_PCS_SGMII is in use, and
  move the comment from stmmac_hw_setup() to here.
- create stmmac_pcs.c, which contains the phylink_pcs_ops structure, a
  dummy .pcs_get_state() method which always reports link-down, and
  .pcs_config() method, moving the call to stmmac_pcs_ctrl_ane() here,
  but without indirecting through the dwmac specific core code. The
  link-down behaviour mentioned above maintains the current behaviour
  when phylink is used with inband but without a PCS.

This will ensure that the PCS control register is configured to the
same settings as before, but will now happen when the netdev is opened
or reusmed rather than only during probe time. However, this will be
before the .fix_mac_speed() method is called, which is critical for the
behaviour in dwmac-qcom-ethqos's ethqos_configure_sgmii() function to
be maintained.

Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Tested-by: Maxime Chevallier <maxime.chevallier@bootlin.com>
Tested-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Link: https://patch.msgid.link/E1v9P72-0000000AomR-3ro4@rmk-PC.armlinux.org.uk
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-10-20 17:17:16 -07:00
Russell King (Oracle)
237e54caea net: stmmac: provide PCS initialisation hook
dwmac cores provide a feature bit to indicate when the PCS block is
present, but features are only read after the core's setup() function
has been called, meaning we can't decide whether to initialise the
integrated PCS in the setup function. Provide a new MAC core hook
for PCS initialisation, which will be called after the feature
registers have been read.

Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Tested-by: Maxime Chevallier <maxime.chevallier@bootlin.com>
Tested-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Link: https://patch.msgid.link/E1v9P6x-0000000AomL-3OKd@rmk-PC.armlinux.org.uk
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-10-20 17:17:16 -07:00
Russell King (Oracle)
045d7e5727 net: stmmac: only call stmmac_pcs_ctrl_ane() for integrated SGMII PCS
The internal PCS registers only exist if the core is synthesized with
SGMII, TBI or RTBI support. They have no relevance for RGMII.

However, priv->hw->pcs contains a STMMAC_PCS_RGMII flag, which is set
if a PCS has been synthesized but we are operating in RGMII mode. As
the register has no effect for RGMII, there is no point calling
stmmac_pcs_ctrl_ane() in this case. Add a comment describing this
and make it conditional on STMMAC_PCS_SGMII.

Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Tested-by: Maxime Chevallier <maxime.chevallier@bootlin.com>
Tested-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Link: https://patch.msgid.link/E1v9P6s-0000000AomE-2pAa@rmk-PC.armlinux.org.uk
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-10-20 17:17:15 -07:00
Russell King (Oracle)
5c61db08d9 net: stmmac: do not require snps,ps-speed for SGMII
SGMII mode does not require port-speed to be specified; this only
switches SGMII to use the MAC configuration register speed settings
and the actual value is irrelevant when the link comes up.

As it seems the intention was to support "reverse SGMII" with this
setting, but the code didn't actually configure that due to a typo,
the warning and bad DT binding documentation has led people to
specify snps,ps-speed in their DT files inappropriately.

If mac_port_sel_speed is zero, then don't complain that the speed
is invalid, as this means we're using "normal" SGMII.

This does _not_ obsolete snps,ps-speed, nor does it change the
behaviour of that property, with the exception of not making people
mistakenly believe that they need to specify this option to use
normal SGMII. There is no need to modify the binding.

Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Tested-by: Maxime Chevallier <maxime.chevallier@bootlin.com>
Tested-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Link: https://patch.msgid.link/E1v9P6n-0000000Aom9-2LuZ@rmk-PC.armlinux.org.uk
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-10-20 17:17:15 -07:00
Russell King (Oracle)
5d1e7621f8 net: stmmac: hw->ps becomes hw->reverse_sgmii_enable
After a lot of digging, it seems that the oddly named hw->ps member
is all about setting the core into reverse SGMII speed. When set to
a non-zero value, it:

1. Configures the MAC at initialisation time to operate at a specific
   speed.
2. It _incorrectly_ enables the transmitter (GMAC_CONFIG_TE) which
   makes no sense, rather than enabling the "transmit configuration"
   bit (GMAC_CONFIG_TC).
3. It configures the SGMII rate adapter layer to retrieve its speed
   setting from the MAC configuration register rather than the PHY.

In the previous commit, we removed (1) and (2) as phylink overwrites
the configuration set at that step.

Thus, the only functional aspect is (3), which is a boolean operation.
This means there is no need to store the actual speed, and just have a
boolean flag.

Convert the priv->ps member to a boolean, and rename it to
priv->reverse_sgmii_enable to make it more understandable.

Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Tested-by: Maxime Chevallier <maxime.chevallier@bootlin.com>
Tested-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Link: https://patch.msgid.link/E1v9P6i-0000000Aom3-1y2y@rmk-PC.armlinux.org.uk
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-10-20 17:17:15 -07:00
Russell King (Oracle)
412d5f32cb net: stmmac: simplify stmmac_check_pcs_mode()
Now that we only support one mode, simplify stmmac_check_pcs_mode().

Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Tested-by: Maxime Chevallier <maxime.chevallier@bootlin.com>
Tested-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Link: https://patch.msgid.link/E1v9P6d-0000000Aolw-1T7d@rmk-PC.armlinux.org.uk
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-10-20 17:17:15 -07:00
Russell King (Oracle)
c7b0d7874d net: stmmac: move reverse-"pcs" mode setup to stmmac_check_pcs_mode()
The broken reverse-mode, selected by snps,ps-speed, is configured when
the platform provides a valid port speed and a PCS is being used.

Both these remain constant after the driver has probed, so the software
state doesn't need to be re-initialised each time stmmac_hw_setup() is
called (which is called at open and resume time.)

Move the software setup of reverse-mode to stmmac_check_pcs_mode()
which is called from the driver probe function.

Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Tested-by: Maxime Chevallier <maxime.chevallier@bootlin.com>
Tested-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Link: https://patch.msgid.link/E1v9P6Y-0000000Aolr-0vLH@rmk-PC.armlinux.org.uk
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-10-20 17:17:15 -07:00
Russell King (Oracle)
70589b05a0 net: stmmac: remove RGMII "pcs" mode
Remove the RGMII "pcs" code in stmmac_check_pcs_mode() due to:

1) This should never have been conditional on a PCS being present, as
   when a core is synthesised using only RGMII, the PCS won't be present
   and priv->dma_cap.pcs will be false. Only multi-interface cores which
   have a PCS present would have detected RGMII.

2) STMMAC_PCS_RGMII has no effect since the broken netif_carrier and
   ethtool code was removed.

Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Tested-by: Maxime Chevallier <maxime.chevallier@bootlin.com>
Tested-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Link: https://patch.msgid.link/E1v9P6T-0000000Aoll-0Ify@rmk-PC.armlinux.org.uk
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-10-20 17:17:15 -07:00
Russell King (Oracle)
aa1b6775ae net: stmmac: remove hw->ps xxx_core_init() hardware setup
After a lot of digging, it seems that the oddly named hw->ps member is
all about configuring the core for reverse SGMII. This member is set to
one of 0, SPEED_10, SPEED_100 or SPEED_1000 depending on
priv->plat->mac_port_sel_speed. On DT systems, this comes from the
"snps,ps-speed" DT property.

When set to a non-zero value, it:

1. Configures the MAC at initialisation time to operate at a specific
   speed. However, this will be overwritten by mac_link_up() when the
   link comes up (e.g. with the fixed-link parameters.)

   Note that dwxgmac2 wants to also support SPEED_2500 and SPEED_10000,
   but both these values are impossible.

2. It _incorrectly_ enables the transmitter (GMAC_CONFIG_TE) which
   makes no sense, rather than enabling the "transmit configuration"
   bit (GMAC_CONFIG_TC). Likely a typo.

3. It configures the SGMII rate adapter layer to retrieve its speed
   setting from the MAC configuration register rather than the PHY.

There are two ways forward here:

a) fixing (2) so that we set GMAC_CONFIG_TC. However, we have platform
   that set the "snps,ps-speed" property and that work today. Fixing
   this will cause the RGMII, SGMII or SMII inband configuration to be
   transmitted, which will be a functional change which could cause a
   regression.

b) ripping out (1) and (2) as they are ineffective. This also has the
   possibility of regressions, but the patch author believes this risk
   is much lower than (a).

Therefore, this commit takes the approach in (b).

Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Tested-by: Maxime Chevallier <maxime.chevallier@bootlin.com>
Tested-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Link: https://patch.msgid.link/E1v9P6N-0000000Aolg-3y0a@rmk-PC.armlinux.org.uk
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-10-20 17:17:14 -07:00
Russell King (Oracle)
19064a58bd net: stmmac: remove unused PCS loopback support
Nothing calls stmmac_pcs_ctrl_ane() with the "loopback" argument set to
anything except zero, so this serves no useful purpose. Remove the
argument to reduce the code complexity.

Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Tested-by: Maxime Chevallier <maxime.chevallier@bootlin.com>
Tested-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Link: https://patch.msgid.link/E1v9P6I-0000000Aola-3Sih@rmk-PC.armlinux.org.uk
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-10-20 17:17:14 -07:00
Russell King (Oracle)
ebc5d656b7 net: stmmac: remove PCS "mode" pause handling
Remove the "we always autoneg pause" forcing when the stmmac driver
decides that a "PCS" is present, which blocks passing the ethtool
pause calls to phylink when using SGMII mode.

This prevents the pause results being reported when a PHY is attached
using SGMII mode, or the pause settings being changed in SGMII mode.
There is no reason to prevent this.

Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Tested-by: Maxime Chevallier <maxime.chevallier@bootlin.com>
Tested-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Link: https://patch.msgid.link/E1v9P6D-0000000AolU-2zjv@rmk-PC.armlinux.org.uk
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-10-20 17:17:14 -07:00
Russell King (Oracle)
2e2c878a31 net: stmmac: remove SGMII/RGMII/SMII interrupt handling
Now that the only use for the interrupt is to clear it and increment a
statistic counter (which is not that relevant anymore) remove all this
code and ensure that the interrupt remains disabled to avoid a stuck
interrupt.

dwmac-sun8i still uses this statistic counter, so it is inappropriate
for this patch to remove it.

Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Tested-by: Maxime Chevallier <maxime.chevallier@bootlin.com>
Tested-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Link: https://patch.msgid.link/E1v9P68-0000000AolO-2W5s@rmk-PC.armlinux.org.uk
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-10-20 17:17:14 -07:00
Russell King (Oracle)
14f74bc6dc net: stmmac: remove xstats.pcs_* members
As a result of the previous commit, the pcs_link, pcs_duplex and
pcs_speed members are not used outside of the interrupt handling code,
and are only used to print their status using the misleading "Link is"
messages that bear no relation to the actual status of the link.

Remove the printing of these messages, these members, and the code
that decodes them from the hardware.

Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Tested-by: Maxime Chevallier <maxime.chevallier@bootlin.com>
Tested-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Link: https://patch.msgid.link/E1v9P63-0000000AolI-23Kf@rmk-PC.armlinux.org.uk
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-10-20 17:17:14 -07:00
Russell King (Oracle)
813882ae22 net: stmmac: remove broken PCS code
Changing the netif_carrier_*() state behind phylink's back has always
been prohibited because it messes up with phylinks state tracking, and
means that phylink no longer guarantees to call the mac_link_down()
and mac_link_up() methods at the appropriate times.  This was later
documented in the sfp-phylink network driver conversion guide.

stmmac was converted to phylink in 2019, but nothing was done with the
"PCS" code. Since then, apart from the updates as part of phylink
development, nothing has happened with stmmac to improve its use of
phylink, or even to address this point.

A couple of years ago, a has_integrated_pcs boolean was added by Bart,
which later became the STMMAC_FLAG_HAS_INTEGRATED_PCS flag, to avoid
manipulating the netif_carrier_*() state. This flag is mis-named,
because whenever the stmmac is synthesized for its native SGMII, TBI
or RTBI interfaces, it has an "integrated PCS". This boolean/flag
actually means "ignore the status from the integrated PCS".

Discussing with Bart, the reasons for this are lost to the winds of
time (which is why we should always document the reasons in the commit
message.)

RGMII also has in-band status, and the dwmac cores and stmmac code
supports this but with one bug that saves the day.

When dwmac cores are synthesised for RGMII only, they do not contain
an integrated PCS, and so priv->dma_cap.pcs is clear, which prevents
(incorrectly) the "RGMII PCS" being used, meaning we don't read the
in-band status. However, a core synthesised for RGMII and also SGMII,
TBI or RTBI will have this capability bit set, thus making these
code paths reachable.

The Jetson Xavier NX uses RGMII mode to talk to its PHY, and removing
the incorrect check for priv->dma_cap.pcs reveals the theortical issue
with netif_carrier_*() manipulation is real:

dwc-eth-dwmac 2490000.ethernet eth0: Register MEM_TYPE_PAGE_POOL RxQ-0
dwc-eth-dwmac 2490000.ethernet eth0: PHY [stmmac-0:00] driver [RTL8211F Gigabit Ethernet] (irq=141)
dwc-eth-dwmac 2490000.ethernet eth0: No Safety Features support found
dwc-eth-dwmac 2490000.ethernet eth0: IEEE 1588-2008 Advanced Timestamp supported
dwc-eth-dwmac 2490000.ethernet eth0: registered PTP clock
dwc-eth-dwmac 2490000.ethernet eth0: configuring for phy/rgmii-id link mode
8021q: adding VLAN 0 to HW filter on device eth0
dwc-eth-dwmac 2490000.ethernet eth0: Adding VLAN ID 0 is not supported
Link is Up - 1000/Full
Link is Down
Link is Up - 1000/Full

This looks good until one realises that the phylink "Link" status
messages are missing, even when the RJ45 cable is reconnected. Nothing
one can do results in the interface working. The interrupt handler
(which prints those "Link is" messages) always wins over phylink's
resolve worker, meaning phylink never calls the mac_link_up() nor
mac_link_down() methods.

eth0 also sees no traffic received, and is unable to obtain a DHCP
address:

3: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group defa
ult qlen 1000
    link/ether e6:d3:6a:e6:92:de brd ff:ff:ff:ff:ff:ff
    RX: bytes  packets  errors  dropped overrun mcast
    0          0        0       0       0       0
    TX: bytes  packets  errors  dropped carrier collsns
    27686      149      0       0       0       0

With the STMMAC_FLAG_HAS_INTEGRATED_PCS flag set, which disables the
netif_carrier_*() manipulation then stmmac works normally:

dwc-eth-dwmac 2490000.ethernet eth0: Register MEM_TYPE_PAGE_POOL RxQ-0
dwc-eth-dwmac 2490000.ethernet eth0: PHY [stmmac-0:00] driver [RTL8211F Gigabit Ethernet] (irq=141)
dwc-eth-dwmac 2490000.ethernet eth0: No Safety Features support found
dwc-eth-dwmac 2490000.ethernet eth0: IEEE 1588-2008 Advanced Timestamp supported
dwc-eth-dwmac 2490000.ethernet eth0: registered PTP clock
dwc-eth-dwmac 2490000.ethernet eth0: configuring for phy/rgmii-id link mode
8021q: adding VLAN 0 to HW filter on device eth0
dwc-eth-dwmac 2490000.ethernet eth0: Adding VLAN ID 0 is not supported
Link is Up - 1000/Full
dwc-eth-dwmac 2490000.ethernet eth0: Link is Up - 1Gbps/Full - flow control rx/tx

and packets can be transferred.

This clearly shows that when priv->hw->pcs is set, but
STMMAC_FLAG_HAS_INTEGRATED_PCS is clear, the driver reliably fails.

Discovering whether a platform falls into this is impossible as
parsing all the dtsi and dts files to find out which use the stmmac
driver, whether any of them use RGMII or SGMII and also depends
whether an external interface is being used. The kernel likely
doesn't contain all dts files either.

The only driver that sets this flag uses the qcom,sa8775p-ethqos
compatible, and uses SGMII or 2500BASE-X.

but these are saved from this problem by the incorrect check for
priv->dma_cap.pcs.

So, we have to assume that for every other platform that uses SGMII
with stmmac is using an external PCS.

Moreover, ethtool output can be incorrect. With the full-duplex link
negotiated, ethtool reports:

        Speed: 1000Mb/s
        Duplex: Half

because with dwmac4, the full-duplex bit is in bit 16 of the status,
priv->xstats.pcs_duplex becomes BIT(16) for full duplex, but the
ethtool ksettings duplex member is u8 - so becomes zero. Moreover,
the supported, advertised and link partner modes are all "not
reported".

Finally, ksettings_set() won't be able to set the advertisement on
a PHY if this PCS code is activated, which is incorrect when SGMII
is used with a PHY.

Thus, remove:
1. the incorrect netif_carrier_*() manipulation.
2. the broken ethtool ksettings code.

Given that all uses of STMMAC_FLAG_HAS_INTEGRATED_PCS are now gone,
remove the flag from stmmac.h and dwmac-qcom-ethqos.c.

Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Tested-by: Maxime Chevallier <maxime.chevallier@bootlin.com>
Tested-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Link: https://patch.msgid.link/E1v9P5y-0000000AolC-1QWH@rmk-PC.armlinux.org.uk
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-10-20 17:17:14 -07:00
Randy Dunlap
3701572931 nl802154: fix some kernel-doc warnings
Correct multiple kernel-doc warnings in nl802154.h:

- Fix a typo on one enum name to avoid a kernel-doc warning.
- Drop 2 enum descriptions that are no longer needed.
- Mark 2 internal enums as "private:" so that kernel-doc is not needed
  for them.

Warning: nl802154.h:239 Enum value 'NL802154_CAP_ATTR_MAX_MAXBE' not described in enum 'nl802154_wpan_phy_capability_attr'
Warning: nl802154.h:239 Excess enum value '%NL802154_CAP_ATTR_MIN_CCA_ED_LEVEL' description in 'nl802154_wpan_phy_capability_attr'
Warning: nl802154.h:239 Excess enum value '%NL802154_CAP_ATTR_MAX_CCA_ED_LEVEL' description in 'nl802154_wpan_phy_capability_attr'
Warning: nl802154.h:369 Enum value '__NL802154_CCA_OPT_ATTR_AFTER_LAST' not described in enum 'nl802154_cca_opts'
Warning: nl802154.h:369 Enum value 'NL802154_CCA_OPT_ATTR_MAX' not described in enum 'nl802154_cca_opts'

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20251016035917.1148012-1-rdunlap@infradead.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-10-20 17:13:40 -07:00
Eric Dumazet
f8a55d5e71 net: add a fast path in __netif_schedule()
Cpus serving NIC interrupts and specifically TX completions are often
trapped in also restarting a busy qdisc (because qdisc was stopped by BQL
or the driver's own flow control).

When they call netdev_tx_completed_queue() or netif_tx_wake_queue(),
they call __netif_schedule() so that the queue can be run
later from net_tx_action() (involving NET_TX_SOFTIRQ)

Quite often, by the time the cpu reaches net_tx_action(), another cpu
grabbed the qdisc spinlock from __dev_xmit_skb(), and we spend too much
time spinning on this lock.

We can detect in __netif_schedule() if a cpu is already at a specific
point in __dev_xmit_skb() where we have the guarantee the queue will
be run.

This patch gives a 13 % increase of throughput on an IDPF NIC (200Gbit),
32 TX qeues, sending UDP packets of 120 bytes.

This also helps __qdisc_run() to not force a NET_TX_SOFTIRQ
if another thread is waiting in __dev_xmit_skb()

Before:

sar -n DEV 5 5|grep eth1|grep Average
Average:         eth1   1496.44 52191462.56    210.00 13369396.90      0.00      0.00      0.00     54.76

After:

sar -n DEV 5 5|grep eth1|grep Average
Average:         eth1   1457.88 59363099.96    205.08 15206384.35      0.00      0.00      0.00     62.29

Signed-off-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: Kuniyuki Iwashima <kuniyu@google.com>
Link: https://patch.msgid.link/20251017145334.3016097-1-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-10-20 16:45:25 -07:00
Alok Tiwari
ba397fde5e net: phy: micrel: fix typos in comments
Fix several spelling and grammatical errors in comments across
micrel PHY drivers. Corrections include:
- "dealy" -> "delay"
- "autonegotation" -> "autonegotiation"
- "recheas" -> "reaches"
- "one" -> "on"
- "improvenent" -> "improvement"
- "intput" -> "input"

Signed-off-by: Alok Tiwari <alok.a.tiwari@oracle.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://patch.msgid.link/20251017193525.1457064-2-alok.a.tiwari@oracle.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-10-20 16:43:54 -07:00
Alok Tiwari
3dfdc98d1d net: phy: micrel: simplify return in ksz9477_phy_errata()
ksz9477_phy_errata function currently assigns the return value of
genphy_restart_aneg() to a variable and then immediately returns it

    err = genphy_restart_aneg(phydev);
    if (err)
        return err;

    return err;

This can be simplified by directly returning the function call
result, as the intermediate variable and conditional are redundant.

Signed-off-by: Alok Tiwari <alok.a.tiwari@oracle.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://patch.msgid.link/20251017193525.1457064-1-alok.a.tiwari@oracle.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-10-20 16:43:54 -07:00
Jakub Kicinski
88224095b4 Merge branch 'net-dsa-lantiq_gswip-clean-up-and-improve-vlan-handling'
Daniel Golle says:

====================
net: dsa: lantiq_gswip: clean up and improve VLAN handling

This series was developed by Vladimir Oltean to improve and clean up the
VLAN handling logic in the Lantiq GSWIP DSA driver.

As Vladimir currently doesn't have the availability to take care of the
submission process, we agreed that I would send the patches on his
behalf.

The series focuses on consolidating the VLAN management paths for both
VLAN-unaware and VLAN-aware bridges, simplifying internal logic, and
removing legacy or redundant code. It also fixes a number of subtle
inconsistencies regarding VLAN ID 0 handling, bridge FDB entries, and
brings the driver into shape to permit dynamic changes to the VLAN
filtering state.

Notable changes include:

 - Support for bridge FDB entries on the CPU port

 - Consolidation of gswip_vlan_add_unaware() and gswip_vlan_add_aware()
   into a unified implementation

 - Removal of legacy VLAN configuration options and redundant
   assignments

 - Improved handling of VLAN ID 0 and PVID behavior

 - Better validation and error reporting in VLAN removal paths

 - Support for dynamic VLAN filtering configuration changes

Overall, this refactor improves readability and maintainability of the
Lantiq GSWIP DSA driver. It also results in all local-termination.sh
tests now passing, and slightly improves the results of
bridge-vlan-{un,}aware.sh.

All patches have been authored by Vladimir Oltean; a small unintended
functional change in patch "net: dsa: lantiq_gswip: merge
gswip_vlan_add_unaware() and gswip_vlan_add_aware()" has been ironed out
and some of the commit descriptions were improved by me, apart from that
I'm only handling the submission and will help with follow-up
discussions or review feedback as needed.

Despite the fact that some changes here do actually fix things (in the
sense that selftests which would previously FAIL now PASS) we decided
that it would be the best for this series of patches to go via net-next.
If requested some of it can still be ported to stable kernels later on.
====================

Link: https://patch.msgid.link/cover.1760566491.git.daniel@makrotopia.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-10-17 17:55:03 -07:00
Vladimir Oltean
1f89ed0ebf net: dsa: lantiq_gswip: treat VID 0 like the PVID
Documentation/networking/switchdev.rst says that VLAN-aware bridges must
treat packets tagged with VID 0 the same as untagged. It appears from
the documentation that setting the GSWIP_PCE_VCTRL_VID0 flag (which this
driver already had defined) might achieve this.

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
Link: https://patch.msgid.link/b220ac149922839a261b754202c05df5bb253c98.1760566491.git.daniel@makrotopia.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-10-17 17:54:59 -07:00
Vladimir Oltean
3bb500caf6 net: dsa: lantiq_gswip: drop untagged on VLAN-aware bridge ports with no PVID
Implement the required functionality, as written in
Documentation/networking/switchdev.rst section "Bridge VLAN filtering",
by using the "VLAN Ingress Tag Rule" feature of the switch.

The bit field definitions for this were found while browsing the Intel
dual BSD/GPLv2 licensed drivers for this switch IP.

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
Link: https://patch.msgid.link/787aa807d00b726d75db2a40add215c8b8ba7466.1760566491.git.daniel@makrotopia.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-10-17 17:54:59 -07:00
Vladimir Oltean
a576276266 net: dsa: lantiq_gswip: put a more descriptive error print in gswip_vlan_remove()
Improve the error message printed in case of a port VLAN entry not being
found upon removal.

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
Link: https://patch.msgid.link/abd4ec58e0f0f53eb3d7027097a20af0bd7b1d6d.1760566491.git.daniel@makrotopia.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-10-17 17:54:59 -07:00
Vladimir Oltean
7ed1965f10 net: dsa: lantiq_gswip: remove vlan_aware and pvid arguments from gswip_vlan_remove()
"bool pvid" is unused since commit "net: dsa: lantiq_gswip: remove
legacy configure_vlan_while_not_filtering option".

"bool vlan_aware" shouldn't have a role in finding the bridge VLAN.
It should be identified by VID regardless of VLAN-aware or VLAN-unaware.
The driver sets up VID 0 for the VLAN-unaware PVID.

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
Link: https://patch.msgid.link/c63f89ca19269ef6c8bf00a62cacc739164b4441.1760566491.git.daniel@makrotopia.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-10-17 17:54:59 -07:00
Vladimir Oltean
96a91e6eeb net: dsa: lantiq_gswip: disallow changes to privately set up VID 0
User space can force the altering of VID 0 as it was privately set up by
this driver.

For example, when the port joins a VLAN-aware bridge,
dsa_user_manage_vlan_filtering() will set NETIF_F_HW_VLAN_CTAG_FILTER.
If the port is subsequently brought up and CONFIG_VLAN_8021Q is enabled,
the vlan_vid0_add() function will want to make sure we are capable of
accepting packets tagged with VID 0.

Generally, DSA/switchdev drivers want to suppress that bit of help from
the 8021q layer, and handle VID 0 filters themselves. The 8021q layer
might actually be even detrimential, because VLANs added through
vlan_vid_add() pass through dsa_user_vlan_rx_add_vid(), which is
documented as this:

	/* This API only allows programming tagged, non-PVID VIDs */
	.flags = 0,

so it will force VID 0 to be reconfigured as egress-tagged, non-PVID.
Whereas the driver configures it as PVID and egress-untagged, the exact
opposite.

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
Link: https://patch.msgid.link/9f68340c34b5312c3b8c6c7ecf3cfce574a3f65d.1760566491.git.daniel@makrotopia.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-10-17 17:54:59 -07:00
Vladimir Oltean
ab3ce58559 net: dsa: lantiq_gswip: permit dynamic changes to VLAN filtering state
The driver should now tolerate these changes, now that the PVID is
automatically recalculated on a VLAN awareness state change.

The VLAN-unaware PVID must be installed to hardware even if the
joined bridge is currently VLAN-aware. Otherwise, when the bridge VLAN
filtering state dynamically changes to VLAN-unaware later, this PVID
will be missing.

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: Daniel Golle <daniel@makrotopia.org>
Link: https://patch.msgid.link/c58759074fb699581336dc2c2c6bf106257b134e.1760566491.git.daniel@makrotopia.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
2025-10-17 17:54:59 -07:00