Reference the common PHY properties, and update the example to use them.
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Link: https://patch.msgid.link/20260119091220.1493761-2-vladimir.oltean@nxp.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Eric Dumazet says:
====================
gro: inline tcp6_gro_{receive,complete}
On some platforms, GRO stack is too deep and causes cpu stalls.
Decreasing call depths by one shows a 1.5 % gain on Zen2 cpus.
(32 RX queues, 100Gbit NIC, RFS enabled, tcp_rr with 128 threads and 10,000 flows)
We can go further by inlining ipv6_gro_{receive,complete}
and take care of IPv4 if there is interest.
Note: two temporary __always_inline will be replaced with
inline_for_performance when/if available.
Cumulative size increase for this series (of 3):
$ scripts/bloat-o-meter -t vmlinux.0 vmlinux.3
add/remove: 2/2 grow/shrink: 5/1 up/down: 1572/-471 (1101)
Function old new delta
ipv6_gro_receive 1069 1846 +777
ipv6_gro_complete 433 733 +300
tcp6_check_fraglist_gro - 272 +272
tcp6_gro_complete 227 306 +79
tcp4_gro_complete 325 397 +72
ipv6_offload_init 218 274 +56
__pfx_tcp6_check_fraglist_gro - 16 +16
__pfx___skb_incr_checksum_unnecessary 32 - -32
__skb_incr_checksum_unnecessary 186 - -186
tcp6_gro_receive 959 706 -253
Total: Before=22592724, After=22593825, chg +0.00%
====================
Link: https://patch.msgid.link/20260120164903.1912995-1-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
FDO/LTO are unable to inline tcp6_gro_receive() from ipv6_gro_receive()
Make sure tcp6_check_fraglist_gro() is only called only when needed,
so that compiler can leave it out-of-line.
$ scripts/bloat-o-meter -t vmlinux.1 vmlinux.2
add/remove: 2/0 grow/shrink: 3/1 up/down: 1123/-253 (870)
Function old new delta
ipv6_gro_receive 1069 1846 +777
tcp6_check_fraglist_gro - 272 +272
ipv6_offload_init 218 274 +56
__pfx_tcp6_check_fraglist_gro - 16 +16
ipv6_gro_complete 433 435 +2
tcp6_gro_receive 959 706 -253
Total: Before=22592662, After=22593532, chg +0.00%
Signed-off-by: Eric Dumazet <edumazet@google.com>
Link: https://patch.msgid.link/20260120164903.1912995-3-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
clang does not inline this helper in GRO fast path.
We can save space and cpu cycles.
$ scripts/bloat-o-meter -t vmlinux.0 vmlinux.1
add/remove: 0/2 grow/shrink: 2/0 up/down: 156/-218 (-62)
Function old new delta
tcp6_gro_complete 227 311 +84
tcp4_gro_complete 325 397 +72
__pfx___skb_incr_checksum_unnecessary 32 - -32
__skb_incr_checksum_unnecessary 186 - -186
Total: Before=22592724, After=22592662, chg -0.00%
Signed-off-by: Eric Dumazet <edumazet@google.com>
Link: https://patch.msgid.link/20260120164903.1912995-2-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
We can change tcp_rsk() and inet_rsk() to propagate their argument
const qualifier thanks to container_of_const().
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: Kuniyuki Iwashima <kuniyu@google.com>
Link: https://patch.msgid.link/20260120125353.1470456-1-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Lorenzo Bianconi says:
====================
airoha: Add the capability to read firmware binary names from dts for Airoha NPU driver
This patch is needed because NPU firmware binaries are board specific since
they depend on the MediaTek WiFi chip used on the board (e.g. MT7996 or
MT7992). This is a preliminary patch to enable MT76 NPU offloading if
the Airoha SoC is equipped with MT7996 (Eagle) WiFi chipset.
====================
Link: https://patch.msgid.link/20260120-airoha-npu-firmware-name-v4-0-88999628b4c1@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Introduce the capability to read the firmware binary names from device-tree
using the firmware-name property if available.
This patch is needed because NPU firmware binaries are board specific since
they depend on the MediaTek WiFi chip used on the board (e.g. MT7996 or
MT7992) and the WiFi chip version info is not available in the NPU driver.
This is a preliminary patch to enable MT76 NPU offloading if the Airoha SoC
is equipped with MT7996 (Eagle) WiFi chipset.
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://patch.msgid.link/20260120-airoha-npu-firmware-name-v4-2-88999628b4c1@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Add firmware-name property in order to introduce the capability to
specify the firmware names used for 'RiscV core' and 'Data section'
binaries. This patch is needed because NPU firmware binaries are board
specific since they depend on the MediaTek WiFi chip used on the board
(e.g. MT7996 or MT7992) and the WiFi chip version info is not available
in the NPU driver. This is a preliminary patch to enable MT76 NPU
offloading if the Airoha SoC is equipped with MT7996 (Eagle) WiFi chipset.
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Link: https://patch.msgid.link/20260120-airoha-npu-firmware-name-v4-1-88999628b4c1@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Andre Carvalho says:
====================
netconsole: support automatic target recovery
This patchset introduces target resume capability to netconsole allowing
it to recover targets when underlying low-level interface comes back
online.
The patchset starts by refactoring netconsole state representation in
order to allow representing deactivated targets (targets that are
disabled due to interfaces unregister).
It then modifies netconsole to handle NETDEV_REGISTER events for such
targets, setups netpoll and forces the device UP. Targets are matched with
incoming interfaces depending on how they were bound in netconsole
(by mac or interface name). For these reasons, we also attempt resuming
on NETDEV_CHANGENAME.
The patchset includes a selftest that validates netconsole target state
transitions and that target is functional after resumed.
====================
Link: https://patch.msgid.link/20260118-netcons-retrigger-v11-0-4de36aebcf48@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Introduce a new netconsole selftest to validate that netconsole is able
to resume a deactivated target when the low level interface comes back.
The test setups the network using netdevsim, creates a netconsole target
and then remove/add netdevsim in order to bring the same interfaces
back. Afterwards, the test validates that the target works as expected.
Targets are created via cmdline parameters to the module to ensure that
we are able to resume targets that were bound by mac and interface name.
Reviewed-by: Breno Leitao <leitao@debian.org>
Signed-off-by: Andre Carvalho <asantostc@gmail.com>
Tested-by: Breno Leitao <leitao@debian.org>
Link: https://patch.msgid.link/20260118-netcons-retrigger-v11-7-4de36aebcf48@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Attempt to resume a previously deactivated target when the associated
interface comes back (NETDEV_REGISTER) or when it changes name
(NETDEV_CHANGENAME) by calling netpoll_setup on the device.
Depending on how the target was setup (by mac or interface name), the
corresponding field is compared with the device being brought up. Targets
that match the incoming device, are scheduled for resume on a workqueue.
Resuming happens on a workqueue as we can't execute netpoll_setup in the
context of the netdev event. A standalone workqueue (as opposed to the
global one) is used to allow for proper cleanup process during
netconsole module cleanup as we need to be able to flush all pending
work before traversing the target list given that targets are temporarily
removed from the list during resume_target.
Target transitions to STATE_DISABLED in case of failures resuming it to
avoid retrying the same target indefinitely.
Signed-off-by: Andre Carvalho <asantostc@gmail.com>
Reviewed-by: Breno Leitao <leitao@debian.org>
Tested-by: Breno Leitao <leitao@debian.org>
Link: https://patch.msgid.link/20260118-netcons-retrigger-v11-6-4de36aebcf48@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit introduces two helper functions to perform lock/unlock on
dynamic_netconsole_mutex providing no-op stub versions when compiled
without CONFIG_NETCONSOLE_DYNAMIC and refactors existing call sites to
use the new helpers.
This is done following kernel coding style guidelines, in preparation
for an upcoming change. It avoids the need for preprocessor conditionals
in the call site and keeps the logic easier to follow.
Signed-off-by: Andre Carvalho <asantostc@gmail.com>
Reviewed-by: Breno Leitao <leitao@debian.org>
Tested-by: Breno Leitao <leitao@debian.org>
Link: https://patch.msgid.link/20260118-netcons-retrigger-v11-5-4de36aebcf48@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This patch makes sure netconsole clears dev_name for devices bound by mac
in order to allow calling setup_netpoll on targets that have previously
been cleaned up (in order to support resuming deactivated targets).
This is required as netpoll_setup populates dev_name even when devices are
matched via mac address. The cleanup is done inside netconsole as bound
by mac is a netconsole concept.
Signed-off-by: Andre Carvalho <asantostc@gmail.com>
Reviewed-by: Breno Leitao <leitao@debian.org>
Tested-by: Breno Leitao <leitao@debian.org>
Link: https://patch.msgid.link/20260118-netcons-retrigger-v11-4-4de36aebcf48@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
When the low level interface brings a netconsole target down, record this
using a new STATE_DEACTIVATED state. This allows netconsole to distinguish
between targets explicitly disabled by users and those deactivated due to
interface state changes.
It also enables automatic recovery and re-enabling of targets if the
underlying low-level interfaces come back online.
From a code perspective, anything that is not STATE_ENABLED is disabled.
Devices (de)enslaving are marked STATE_DISABLED to prevent automatically
resuming as enslaved interfaces cannot have netconsole enabled.
Signed-off-by: Breno Leitao <leitao@debian.org>
Signed-off-by: Andre Carvalho <asantostc@gmail.com>
Tested-by: Breno Leitao <leitao@debian.org>
Link: https://patch.msgid.link/20260118-netcons-retrigger-v11-3-4de36aebcf48@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This patch refactors the netconsole driver's target enabled state from a
simple boolean to an explicit enum (`target_state`).
This allow the states to be expanded to a new state in the upcoming
change.
Co-developed-by: Breno Leitao <leitao@debian.org>
Signed-off-by: Breno Leitao <leitao@debian.org>
Reviewed-by: Breno Leitao <leitao@debian.org>
Signed-off-by: Andre Carvalho <asantostc@gmail.com>
Tested-by: Breno Leitao <leitao@debian.org>
Link: https://patch.msgid.link/20260118-netcons-retrigger-v11-2-4de36aebcf48@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Introduces a enum to track netconsole target state which is going to
replace the enabled boolean.
Signed-off-by: Breno Leitao <leitao@debian.org>
Signed-off-by: Andre Carvalho <asantostc@gmail.com>
Tested-by: Breno Leitao <leitao@debian.org>
Link: https://patch.msgid.link/20260118-netcons-retrigger-v11-1-4de36aebcf48@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Suraj Gupta says:
====================
Add devm_clk_bulk_get_optional_enable() helper and use in AXI Ethernet driver
This patch series introduces a new managed clock framework helper function
and demonstrates its usage in AXI ethernet driver.
Device drivers frequently need to get optional bulk clocks, prepare them,
and enable them during probe, while ensuring automatic cleanup on device
unbind. Currently, this requires three separate operations with manual
cleanup handling.
The new devm_clk_bulk_get_optional_enable() helper combines these
operations into a single managed call, eliminating boilerplate code and
following the established pattern of devm_clk_bulk_get_all_enabled().
====================
Link: https://patch.msgid.link/20260116192725.972966-1-suraj.gupta2@amd.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Transition axienet_probe() to managed resource allocation using devm_*
APIs for network device and clock handling, while improving error paths
with dev_err_probe(). This eliminates the need for manual resource
cleanup during probe failures and streamlines the remove() function.
Signed-off-by: Sean Anderson <sean.anderson@linux.dev>
Co-developed-by: Suraj Gupta <suraj.gupta2@amd.com>
Signed-off-by: Suraj Gupta <suraj.gupta2@amd.com>
Link: https://patch.msgid.link/20260116192725.972966-3-suraj.gupta2@amd.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Add a new managed clock framework helper function that combines getting
optional bulk clocks and enabling them in a single operation.
The devm_clk_bulk_get_optional_enable() function simplifies the common
pattern where drivers need to get optional bulk clocks, prepare and enable
them, and have them automatically disabled/unprepared and freed when the
device is unbound.
This new API follows the established pattern of
devm_clk_bulk_get_all_enabled() and reduces boilerplate code in drivers
that manage multiple optional clocks.
Suggested-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Suraj Gupta <suraj.gupta2@amd.com>
Reviewed-by: Brian Masney <bmasney@redhat.com>
Acked-by: Stephen Boyd <sboyd@kernel.org>
Link: https://patch.msgid.link/20260116192725.972966-2-suraj.gupta2@amd.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
HIPPI has not been relevant for over two decades. It was rapidly
eclipsed by Fibre Channel, and even when it was new, it was
confined to very high-end hardware. The HIPPI code has only
received tree-wide changes and fixes by inspection in the entire
Git history. Remove HIPPI support and the rrunner HIPPI driver,
and move the former maintainer to the CREDITS file. Keep the
include/uapi/linux/if_hippi.h header because it is used by the TUN
code, and to avoid breaking userspace, however unlikely that may be.
Signed-off-by: Ethan Nelson-Moore <enelsonmoore@gmail.com>
Link: https://patch.msgid.link/20260119022451.22344-1-enelsonmoore@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
tcp_rate_skb_delivered() is only called from tcp_input.c.
Move it there and make it static.
Both gcc and clang are (auto)inlining it, TCP performance
is increased at a small space cost.
$ scripts/bloat-o-meter -t vmlinux.old vmlinux.new
add/remove: 0/2 grow/shrink: 3/0 up/down: 509/-187 (322)
Function old new delta
tcp_sacktag_walk 1682 1867 +185
tcp_ack 5230 5405 +175
tcp_shifted_skb 437 586 +149
__pfx_tcp_rate_skb_delivered 16 - -16
tcp_rate_skb_delivered 171 - -171
Total: Before=22566192, After=22566514, chg +0.00%
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: Neal Cardwell <ncardwell@google.com>
Link: https://patch.msgid.link/20260118123204.2315993-1-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Yicong Hui says:
====================
Fix typos in network driver code comments
Fix various minor typos and mispellings in 3 different driver
subdirectories in drivers/net/ethernet
====================
Link: https://patch.msgid.link/20260118121001.136806-1-yiconghui@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Based on the fact that either bus_id-based matching or phy_uid-based
matching is used, the code can be simplified. PHY_ANY_ID and
PHY_ANY_UID are not needed. Ensure that phy_id_compare() is called
only if phy_uid_mask isn't zero, because a zero value would always
result in a match.
In addition change the return value type of phy_needs_fixup() to bool.
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Link: https://patch.msgid.link/e7394cc8-5895-4d02-a8fe-802345c7c547@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Use of_device_get_match_data() to replace the open-coded method for
obtaining the device config.
Additionally, adjust the ordering of local variables to ensure
compatibility with RCS.
Signed-off-by: Kevin Hao <haokexin@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://patch.msgid.link/20260117-macb-v1-1-f092092d8c91@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
The industry standard jumbo frame MTU is 9216 bytes. When using the DSA
subsystem, a 4-byte tag is added to each Ethernet frame.
Increase AIROHA_MAX_MTU to 9220 bytes (9216 + 4) so that users can set a
standard 9216-byte MTU on DSA ports.
The underlying hardware supports significantly larger frame sizes
(approximately 16K). However, the maximum MTU is limited to 9220 bytes
for now, as this is sufficient to support standard jumbo frames and does
not incur additional memory allocation overhead.
Signed-off-by: Sayantan Nandy <sayantann11@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Acked-by: Lorenzo Bianconi <lorenzo@kernel.org>
Link: https://patch.msgid.link/20260119073658.6216-1-sayantann11@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
active_fec is a 2-bit unsigned field, and thus can only have the values
0-3. So checking that it is less than 4 is unnecessary.
Simplify the code by dropping this check.
As it no longer fits well where it is, move FEC_MAX_INDEX to towards the
top of the file. And add the prefix OXT2. I believe this is more
idiomatic.
Flagged by Smatch as:
...//otx2_ethtool.c:1024 otx2_get_fecparam() warn: always true condition '(pfvf->linfo.fec < 4) => (0-3 < 4)'
No functional change intended.
Compile tested only.
Signed-off-by: Simon Horman <horms@kernel.org>
Reviewed-by: Vadim Fedorenko <vadim.fedorenko@linux.dev>
Reviewed-by: Hariprasad Kelam <hkelam@marvell.com>
Link: https://patch.msgid.link/20260119-oob-v1-1-a4147e75e770@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Looks like AI reviewers miss that napi_consume_skb() must have
a real budget passed to it. Let's see if adding a real kdoc will
help them figure this out.
Reviewed-by: Jason Xing <kerneljasonxing@gmail.com>
Link: https://patch.msgid.link/20260119224140.1362729-1-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
When the TX queue length reaches the threshold, the netdev watchdog
immediately detects a TX queue timeout.
This patch updates the trans_start timestamp of the transmit queue
on every asynchronous USB URB submission along the transmit path,
ensuring that the network watchdog accurately reflects ongoing
transmission activity.
Signed-off-by: Mingj Ye <insyelu@gmail.com>
Reviewed-by: Hayes Wang <hayeswang@realtek.com>
Link: https://patch.msgid.link/20260120015949.84996-1-insyelu@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Commit ca9d74eb5f ("uapi: add INT_MAX and INT_MIN constants")
recently removed some includes of limits.h in uAPI headers.
ncdevmem.c was depending on them:
ncdevmem.c: In function ‘ethtool_add_flow’:
ncdevmem.c:369:60: error: ‘INT_MAX’ undeclared (first use in this function)
369 | if (endptr == id_start || flow_id < 0 || flow_id > INT_MAX)
| ^~~~~~~
ncdevmem.c:77:1: note: ‘INT_MAX’ is defined in header ‘<limits.h>’; did you forget to ‘#include <limits.h>’?
Reviewed-by: Mina Almasry <almasrymina@google.com>
Link: https://patch.msgid.link/20260120180319.1673271-1-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
After skb allocation, initial skb->fclone value is 0 (SKB_FCLONE_UNAVAILABLE)
We can replace one RMW sequence with a single OR instruction.
movzbl 0x7e(%r13),%eax // skb->fclone = SKB_FCLONE_ORIG;
and $0xf3,%al
or $0x4,%al
mov %al,0x7e(%r13)
->
or $0x4,0x7e(%r13) // skb->fclone |= SKB_FCLONE_ORIG;
Signed-off-by: Eric Dumazet <edumazet@google.com>
Link: https://patch.msgid.link/20260116164402.1872649-1-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Stefan Eichenberger says:
====================
Convert the Micrel bindings to DT schema
Convert the device tree bindings for the Micrel PHYs and switches to DT
schema.
====================
Link: https://patch.msgid.link/20260116130948.79558-1-eichest@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Convert the micrel-ksz90x1.txt to DT schema. Create a separate YAML file
for this PHY series. The old naming of ksz90x1 would be misleading in
this case, so rename it to gigabit, as it contains ksz9xx1 and lan8xxx
gigabit PHYs.
Signed-off-by: Stefan Eichenberger <stefan.eichenberger@toradex.com>
Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Link: https://patch.msgid.link/20260116130948.79558-3-eichest@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Convert the devicetree bindings for the Micrel PHYs and switches to DT
schema.
Signed-off-by: Stefan Eichenberger <stefan.eichenberger@toradex.com>
Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Link: https://patch.msgid.link/20260116130948.79558-2-eichest@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
LAN969x has 2 dedicated RGMII ports, so regular SERDES lanes are not used
for RGMII.
So, lets not require phys to be defined when any of the rgmii phy-modes are
set.
Signed-off-by: Robert Marko <robert.marko@sartura.hr>
Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Link: https://patch.msgid.link/20260115114021.111324-11-robert.marko@sartura.hr
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Extend HW timestamp tests to check that ioctl interface is not broken
and configuration setups and requests are equal to netlink interface.
Some linter warnings are disabled because of ctypes classes.
Reviewed-by: Kory Maincent <kory.maincent@bootlin.com>
Signed-off-by: Vadim Fedorenko <vadim.fedorenko@linux.dev>
Link: https://patch.msgid.link/20260116062121.1230184-2-vadim.fedorenko@linux.dev
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
With all drivers converted to use ndo_hwstamp callbacks the legacy way
can be removed, marking ioctl interface as deprecated.
Signed-off-by: Vadim Fedorenko <vadim.fedorenko@linux.dev>
Reviewed-by: Kory Maincent <kory.maincent@bootlin.com>
Link: https://patch.msgid.link/20260116062121.1230184-1-vadim.fedorenko@linux.dev
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
kmalloc_reserve() is too big to be inlined.
Put the slow path in a new out-of-line function : kmalloc_pfmemalloc()
Then let kmalloc_reserve() set skb->pfmemalloc only when/if
the slow path is taken.
This makes __alloc_skb() faster :
- kmalloc_reserve() is now automatically inlined by both gcc and clang.
- No more expensive RMW (skb->pfmemalloc = pfmemalloc).
- No more expensive stack canary (for CONFIG_STACKPROTECTOR_STRONG=y).
- Removal of two prefetches that were coming too late for modern cpus.
Text size increase is quite small compared to the cpu savings (~0.7 %)
$ size net/core/skbuff.clang.before.o net/core/skbuff.clang.after.o
text data bss dec hex filename
72507 5897 0 78404 13244 net/core/skbuff.clang.before.o
72681 5897 0 78578 132f2 net/core/skbuff.clang.after.o
Signed-off-by: Eric Dumazet <edumazet@google.com>
Link: https://patch.msgid.link/20260116041359.181104-1-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Mohsin Bashir says:
====================
eth: fbnic: Update IPC mailbox support
Update IPC mailbox support for fbnic to cater for several changes.
====================
Link: https://patch.msgid.link/20260115003353.4150771-1-mohsin.bashr@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
While waiting for completions on read requests, driver is using
different timeout values for different messages. Make use of a single
timeout value.
Introduce a wrapper function to handle the wait, which also simplify
maintaining the 80 char line limit.
Signed-off-by: Mohsin Bashir <mohsin.bashr@gmail.com>
Link: https://patch.msgid.link/20260115003353.4150771-6-mohsin.bashr@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
The driver retries sensor read requests from firmware, but this is
unnecessary. A functioning firmware should respond to each request
within the timeout period. Remove the retry logic and set the timeout
to the sum of all retry timeouts.
Signed-off-by: Mohsin Bashir <mohsin.bashr@gmail.com>
Link: https://patch.msgid.link/20260115003353.4150771-5-mohsin.bashr@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Currently, the RX mailbox frees and reallocates a page for each received
message. Since FW Rx messages are processed synchronously, and nothing
hold these pages (unlike skbs which we hand over to the stack), reuse
the pages and put them back on the Rx ring. Now that we ensure the ring
is always fully populated we don't have to worry about filling it up
after partial population during init, either. Update
fbnic_mbx_process_rx_msgs() to recycle pages after message processing.
Signed-off-by: Mohsin Bashir <mohsin.bashr@gmail.com>
Link: https://patch.msgid.link/20260115003353.4150771-4-mohsin.bashr@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Now that memory is allocated with GFP_KERNEL, allocation failures
should be extremely rare. Ensure the FW communication ring is
always fully populated with free pages, and hard fail initialization
otherwise. This enables simplifications in next patches.
Signed-off-by: Mohsin Bashir <mohsin.bashr@gmail.com>
Link: https://patch.msgid.link/20260115003353.4150771-3-mohsin.bashr@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Replace GFP_ATOMIC with GFP_KERNEL for mailbox RX page allocation. Since
interrupt handler is threaded GFP_KERNEL is a safe option to reduce
allocation failures.
Also remove __GFP_NOWARN so the kernel reports a warning on allocation
failure to aid debugging.
Signed-off-by: Mohsin Bashir <mohsin.bashr@gmail.com>
Link: https://patch.msgid.link/20260115003353.4150771-2-mohsin.bashr@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Pavel Begunkov says:
====================
Add support for providers with large rx buffer
Many modern NICs support configurable receive buffer lengths, and zcrx and
memory providers can use buffers larger than 4K to improve performance.
When paired with hw-gro larger rx buffer sizes can drastically reduce
the number of buffers traversing the stack and save a lot of processing
time. It also allows to give to users larger contiguous chunks of data.
Single stream benchmarks showed up to ~30% CPU util improvement.
E.g. comparison for 4K vs 32K buffers using a 200Gbit NIC:
packets=23987040 (MB=2745098), rps=199559 (MB/s=22837)
CPU %usr %nice %sys %iowait %irq %soft %idle
0 1.53 0.00 27.78 2.72 1.31 66.45 0.22
packets=24078368 (MB=2755550), rps=200319 (MB/s=22924)
CPU %usr %nice %sys %iowait %irq %soft %idle
0 0.69 0.00 8.26 31.65 1.83 57.00 0.57
This series adds net infrastructure for memory providers configuring
the size and implements it for bnxt. It's an opt-in feature for drivers,
they should advertise support for the parameter in the qops and must check
if the hardware supports the given size. It's limited to memory providers
as it drastically simplifies implementation. It doesn't affect the fast
path zcrx uAPI, and the user exposed parameter is defined in zcrx terms,
which allows it to be flexible and adjusted in the future.
A liburing example can be found at [2]
full branch:
[1] https://github.com/isilence/linux.git zcrx/large-buffers-v8
Liburing example:
[2] https://github.com/isilence/liburing.git zcrx/rx-buf-len
* tag 'net-queue-rx-buf-len-v9' of https://github.com/isilence/linux:
io_uring/zcrx: document area chunking parameter
selftests: iou-zcrx: test large chunk sizes
eth: bnxt: support qcfg provided rx page size
eth: bnxt: adjust the fill level of agg queues with larger buffers
eth: bnxt: store rx buffer size per queue
net: pass queue rx page size from memory provider
net: add bare bone queue configs
net: reduce indent of struct netdev_queue_mgmt_ops members
net: memzero mp params when closing a queue
====================
Link: https://patch.msgid.link/
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This reverts commit 77b9c4a438, reversing
changes made to 4515ec4ad58a37e70a9e1256c0b993958c9b7497:
931420a2fc ("selftests/net: Add netkit container tests")
ab771c938d ("selftests/net: Make NetDrvContEnv support queue leasing")
6be87fbb27 ("selftests/net: Add env for container based tests")
61d99ce3df ("selftests/net: Add bpf skb forwarding program")
920da36341 ("netkit: Add xsk support for af_xdp applications")
eef51113f8 ("netkit: Add netkit notifier to check for unregistering devices")
b5ef109d22 ("netkit: Implement rtnl_link_ops->alloc and ndo_queue_create")
b5c3fa4a0b ("netkit: Add single device mode for netkit")
0073d2fd67 ("xsk: Proxy pool management for leased queues")
1ecea95dd3 ("xsk: Extend xsk_rcv_check validation")
804bf334d0 ("net: Proxy netdev_queue_get_dma_dev for leased queues")
0caa9a8dde ("net: Proxy net_mp_{open,close}_rxq for leased queues")
ff8889ff91 ("net, ethtool: Disallow leased real rxqs to be resized")
9e2103f361 ("net: Add lease info to queue-get response")
31127dedde ("net: Implement netdev_nl_queue_create_doit")
a5546e18f7 ("net: Add queue-create operation")
The series will conflict with io_uring work, and the code needs more
polish.
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Daniel Borkmann says:
====================
netkit: Support for io_uring zero-copy and AF_XDP
Containers use virtual netdevs to route traffic from a physical netdev
in the host namespace. They do not have access to the physical netdev
in the host and thus can't use memory providers or AF_XDP that require
reconfiguring/restarting queues in the physical netdev.
This patchset adds the concept of queue leasing to virtual netdevs that
allow containers to use memory providers and AF_XDP at native speed.
Leased queues are bound to a real queue in a physical netdev and act
as a proxy.
Memory providers and AF_XDP operations take an ifindex and queue id,
so containers would pass in an ifindex for a virtual netdev and a queue
id of a leased queue, which then gets proxied to the underlying real
queue.
We have implemented support for this concept in netkit and tested the
latter against Nvidia ConnectX-6 (mlx5) as well as Broadcom BCM957504
(bnxt_en) 100G NICs. For more details see the individual patches.
====================
Link: https://patch.msgid.link/20260115082603.219152-1-daniel@iogearbox.net
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
