AMD XGBE hardware supports giant Ethernet frames up to 16K bytes.
Add support for configuring and enabling giant packet handling
in the driver.
- Define new register fields and macros for giant packet support.
- Update the jumbo frame configuration logic to enable giant
packet mode when MTU exceeds the jumbo threshold.
Acked-by: Shyam Sundar S K <Shyam-sundar.S-k@amd.com>
Signed-off-by: Raju Rangoju <Raju.Rangoju@amd.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20250701121929.319690-1-Raju.Rangoju@amd.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
udp_v4_early_demux now returns drop reasons as it either returns 0 or
ip_mc_validate_source, which returns itself a drop reason. However its
use was not converted in ip_rcv_finish_core and the drop reason is
ignored, leading to potentially skipping increasing LINUX_MIB_IPRPFILTER
if the drop reason is SKB_DROP_REASON_IP_RPFILTER.
This is a fix and we're not converting udp_v4_early_demux to explicitly
return a drop reason to ease backports; this can be done as a follow-up.
Fixes: d46f827016 ("net: ip: make ip_mc_validate_source() return drop reason")
Cc: Menglong Dong <menglong8.dong@gmail.com>
Reported-by: Sabrina Dubroca <sd@queasysnail.net>
Signed-off-by: Antoine Tenart <atenart@kernel.org>
Reviewed-by: Sabrina Dubroca <sd@queasysnail.net>
Link: https://patch.msgid.link/20250701074935.144134-1-atenart@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Set the driver limit to GSO_MAX_SIZE (512 KB).
This allows the admin/user to set a GSO limit up to this value, to
avoid segmenting too large GRO packets in the netem -> ifb path.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Link: https://patch.msgid.link/20250701084540.459261-1-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
When setting "ethtool -L eth0 combined 1", the number of RX/TX queue is
changed to be 1. RSS is disabled at this moment, and the indices of FDIR
have not be changed in wx_set_rss_queues(). So the combined count still
shows the previous value. This issue was introduced when supporting
FDIR. Fix it for those devices that support FDIR.
Fixes: 34744a7749 ("net: txgbe: add FDIR info to ethtool ops")
Cc: stable@vger.kernel.org
Signed-off-by: Jiawen Wu <jiawenwu@trustnetic.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/A5C8FE56D6C04608+20250701070625.73680-1-jiawenwu@trustnetic.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
The link status is latched low so that momentary link drops
can be detected. Always double-reading the status defeats this
design feature. Only double read if link was already down
This prevents unnecessary duplicate readings of the link status.
Fixes: 4f3b20bfbb ("amd-xgbe: add support for rx-adaptation")
Signed-off-by: Raju Rangoju <Raju.Rangoju@amd.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Link: https://patch.msgid.link/20250701065016.4140707-1-Raju.Rangoju@amd.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Certain classful qdiscs may invoke their classes' dequeue handler on an
enqueue operation. This may unexpectedly empty the child qdisc and thus
make an in-flight class passive via qlen_notify(). Most qdiscs do not
expect such behaviour at this point in time and may re-activate the
class eventually anyways which will lead to a use-after-free.
The referenced fix commit attempted to fix this behavior for the HFSC
case by moving the backlog accounting around, though this turned out to
be incomplete since the parent's parent may run into the issue too.
The following reproducer demonstrates this use-after-free:
tc qdisc add dev lo root handle 1: drr
tc filter add dev lo parent 1: basic classid 1:1
tc class add dev lo parent 1: classid 1:1 drr
tc qdisc add dev lo parent 1:1 handle 2: hfsc def 1
tc class add dev lo parent 2: classid 2:1 hfsc rt m1 8 d 1 m2 0
tc qdisc add dev lo parent 2:1 handle 3: netem
tc qdisc add dev lo parent 3:1 handle 4: blackhole
echo 1 | socat -u STDIN UDP4-DATAGRAM:127.0.0.1:8888
tc class delete dev lo classid 1:1
echo 1 | socat -u STDIN UDP4-DATAGRAM:127.0.0.1:8888
Since backlog accounting issues leading to a use-after-frees on stale
class pointers is a recurring pattern at this point, this patch takes
a different approach. Instead of trying to fix the accounting, the patch
ensures that qdisc_tree_reduce_backlog always calls qlen_notify when
the child qdisc is empty. This solves the problem because deletion of
qdiscs always involves a call to qdisc_reset() and / or
qdisc_purge_queue() which ultimately resets its qlen to 0 thus causing
the following qdisc_tree_reduce_backlog() to report to the parent. Note
that this may call qlen_notify on passive classes multiple times. This
is not a problem after the recent patch series that made all the
classful qdiscs qlen_notify() handlers idempotent.
Fixes: 3f98113810 ("sch_hfsc: Fix qlen accounting bug when using peek in hfsc_enqueue()")
Signed-off-by: Lion Ackermann <nnamrec@gmail.com>
Reviewed-by: Jamal Hadi Salim <jhs@mojatatu.com>
Acked-by: Cong Wang <xiyou.wangcong@gmail.com>
Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Link: https://patch.msgid.link/d912cbd7-193b-4269-9857-525bee8bbb6a@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Both functions are always called under RCU.
We remove the extra rcu_read_lock()/rcu_read_unlock().
We use skb_dst_dev_net_rcu() instead of skb_dst_dev_net().
We use dev_net_rcu() instead of dev_net().
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: Kuniyuki Iwashima <kuniyu@google.com>
Link: https://patch.msgid.link/20250630121934.3399505-11-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Use the new helpers as a step to deal with potential dst->dev races.
v2: fix typo in ipv6_rthdr_rcv() (kernel test robot <lkp@intel.com>)
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: Kuniyuki Iwashima <kuniyu@google.com>
Link: https://patch.msgid.link/20250630121934.3399505-10-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Use the new helper as a step to deal with potential dst->dev races.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: Kuniyuki Iwashima <kuniyu@google.com>
Link: https://patch.msgid.link/20250630121934.3399505-9-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Use the new helpers as a first step to deal with
potential dst->dev races.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: Kuniyuki Iwashima <kuniyu@google.com>
Link: https://patch.msgid.link/20250630121934.3399505-8-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
dst->dev is read locklessly in many contexts,
and written in dst_dev_put().
Fixing all the races is going to need many changes.
We probably will have to add full RCU protection.
Add three helpers to ease this painful process.
static inline struct net_device *dst_dev(const struct dst_entry *dst)
{
return READ_ONCE(dst->dev);
}
static inline struct net_device *skb_dst_dev(const struct sk_buff *skb)
{
return dst_dev(skb_dst(skb));
}
static inline struct net *skb_dst_dev_net(const struct sk_buff *skb)
{
return dev_net(skb_dst_dev(skb));
}
static inline struct net *skb_dst_dev_net_rcu(const struct sk_buff *skb)
{
return dev_net_rcu(skb_dst_dev(skb));
}
Fixes: 4a6ce2b6f2 ("net: introduce a new function dst_dev_put()")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: Kuniyuki Iwashima <kuniyu@google.com>
Link: https://patch.msgid.link/20250630121934.3399505-7-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
dst_dev_put() can overwrite dst->output while other
cpus might read this field (for instance from dst_output())
Add READ_ONCE()/WRITE_ONCE() annotations to suppress
potential issues.
We will likely need RCU protection in the future.
Fixes: 4a6ce2b6f2 ("net: introduce a new function dst_dev_put()")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: Kuniyuki Iwashima <kuniyu@google.com>
Link: https://patch.msgid.link/20250630121934.3399505-6-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
dst_dev_put() can overwrite dst->input while other
cpus might read this field (for instance from dst_input())
Add READ_ONCE()/WRITE_ONCE() annotations to suppress
potential issues.
We will likely need full RCU protection later.
Fixes: 4a6ce2b6f2 ("net: introduce a new function dst_dev_put()")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: Kuniyuki Iwashima <kuniyu@google.com>
Link: https://patch.msgid.link/20250630121934.3399505-5-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
(dst_entry)->lastuse is read and written locklessly,
add corresponding annotations.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: Kuniyuki Iwashima <kuniyu@google.com>
Link: https://patch.msgid.link/20250630121934.3399505-4-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
(dst_entry)->expires is read and written locklessly,
add corresponding annotations.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: Kuniyuki Iwashima <kuniyu@google.com>
Link: https://patch.msgid.link/20250630121934.3399505-3-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Eric Dumazet says:
====================
net: introduce net_aligned_data
____cacheline_aligned_in_smp on small fields like
tcp_memory_allocated and udp_memory_allocated is not good enough.
It makes sure to put these fields at the start of a cache line,
but does not prevent the linker from using the cache line for other
fields, with potential performance impact.
nm -v vmlinux|egrep -5 "tcp_memory_allocated|udp_memory_allocated"
...
ffffffff83e35cc0 B tcp_memory_allocated
ffffffff83e35cc8 b __key.0
ffffffff83e35cc8 b __tcp_tx_delay_enabled.1
ffffffff83e35ce0 b tcp_orphan_timer
...
ffffffff849dddc0 B udp_memory_allocated
ffffffff849dddc8 B udp_encap_needed_key
ffffffff849dddd8 B udpv6_encap_needed_key
ffffffff849dddf0 b inetsw_lock
One solution is to move these sensitive fields to a structure,
so that the compiler is forced to add empty holes between each member.
nm -v vmlinux|egrep -2 "tcp_memory_allocated|udp_memory_allocated|net_aligned_data"
ffffffff885af970 b mem_id_init
ffffffff885af980 b __key.0
ffffffff885af9c0 B net_aligned_data
ffffffff885afa80 B page_pool_mem_providers
ffffffff885afa90 b __key.2
v1: https://lore.kernel.org/netdev/20250627200551.348096-1-edumazet@google.com/
====================
Link: https://patch.msgid.link/20250630093540.3052835-1-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
____cacheline_aligned_in_smp attribute only makes sure to align
a field to a cache line. It does not prevent the linker to use
the remaining of the cache line for other variables, causing
potential false sharing.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: Willem de Bruijn <willemb@google.com>
Link: https://patch.msgid.link/20250630093540.3052835-5-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
____cacheline_aligned_in_smp attribute only makes sure to align
a field to a cache line. It does not prevent the linker to use
the remaining of the cache line for other variables, causing
potential false sharing.
Move tcp_memory_allocated into a dedicated cache line.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: Willem de Bruijn <willemb@google.com>
Link: https://patch.msgid.link/20250630093540.3052835-4-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Using per-cpu data for net->net_cookie generation is overkill,
because even busy hosts do not create hundreds of netns per second.
Make sure to put net_cookie in a private cache line to avoid
potential false sharing.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: Willem de Bruijn <willemb@google.com>
Link: https://patch.msgid.link/20250630093540.3052835-3-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This structure will hold networking data that must
consume a full cache line to avoid accidental false sharing.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reviewed-by: Willem de Bruijn <willemb@google.com>
Link: https://patch.msgid.link/20250630093540.3052835-2-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
According to USB4 specification, if E2E flow control is disabled for
the Transmit Descriptor Ring, the Host Interface Adapter Layer shall
not require any credits to be available before transmitting a Tunneled
Packet from this Transmit Descriptor Ring, so e2e flow control should
be enabled in both directions.
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Link: https://lore.kernel.org/20250624153805.GC2824380@black.fi.intel.com
Signed-off-by: zhangjianrong <zhangjianrong5@huawei.com>
Link: https://patch.msgid.link/20250628093813.647005-1-zhangjianrong5@huawei.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
According to the description of tb_xdomain_enable_paths(), the third
parameter represents the transmit ring and the fifth parameter represents
the receive ring. tb_xdomain_disable_paths() is the same case.
[Jakub] Mika says: it works now because both rings ->hop is the same
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Link: https://lore.kernel.org/20250625051149.GD2824380@black.fi.intel.com
Signed-off-by: zhangjianrong <zhangjianrong5@huawei.com>
Link: https://patch.msgid.link/20250628094920.656658-1-zhangjianrong5@huawei.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Since our output items contain their name, we don't need to pass it
separately.
Reviewed-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
This class is intended to replace the unstructured dict used to accumulate
an entry to pass to an output module. For now, it remains unstructured,
but it works well enough that the output classes don't notice the
difference.
Reviewed-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Introduce device tree overlays for supporting the eMMC (RTK0EF0186B02000BJ)
and microSD (RTK0EF0186B01000BJ) sub-boards connected via the CN15
connector on the RZ/V2H and RZ/V2N evaluation kits.
These overlays enable SDHI0 with appropriate pin control settings, power
regulators, and GPIO handling. Both sub-boards are supported using shared
overlay files that can be applied to either EVK due to their identical
connector layout and interface support.
To support this, new DT overlay files are added:
- `rzv2-evk-cn15-emmc.dtso` for eMMC
- `rzv2-evk-cn15-sd.dtso` for microSD
Additionally, the base DTS files for both EVKs are updated to include a
fixed 1.8V regulator (`reg_1p8v`) needed by the eMMC sub-board and
potential future use cases such as HDMI output.
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/20250627193742.110818-1-prabhakar.mahadev-lad.rj@bp.renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Add clock and reset entries for the XSPI interface on the R9A09G057 SoC.
While at it, rename CLK_PLLCM33_DIV4_PLLCM33 to CLK_PLLCM33_GEAR to align
with the terminology used in the hardware manual.
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/20250627204237.214635-7-prabhakar.mahadev-lad.rj@bp.renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Add support for fixed-factor module clocks that can report their enable
status through the module status monitor. Introduce a new clock type,
CLK_TYPE_FF_MOD_STATUS, and define the associated structure,
rzv2h_ff_mod_status_clk, to manage these clocks.
Implement the .is_enabled callback by reading the module status register
using monitor index and bit definitions. Provide a helper macro,
DEF_FIXED_MOD_STATUS, to simplify the definition of such clocks.
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/20250627204237.214635-5-prabhakar.mahadev-lad.rj@bp.renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
The mux smux2_xspi_clk{0,1} used for selecting spi and spix2 clocks and
pllcm33_xspi divider to select different clock rates. Add support for
both.
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/20250627204237.214635-4-prabhakar.mahadev-lad.rj@bp.renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
The mux smux2_xspi_clk{0,1} used for selecting spi and spix2 clocks and
pllcm33_xspi divider to select different clock rates. Add support for
both.
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/20250627204237.214635-3-prabhakar.mahadev-lad.rj@bp.renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Expanded Serial Peripheral Interface (XSPI) clock DT binding definitions
for the Renesas RZ/V2N (R9A09G056) and RZ/V2H (R9A09G057) SoCs, shared
by driver and DT source files.
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Merge tag 'renesas-r9a09g057-dt-binding-defs-tag4' into renesas-clk-for-v6.17
Renesas RZ/V2N and RZ/V2H XSPI Clock DT Binding Definitions
Expanded Serial Peripheral Interface (XSPI) clock DT binding definitions
for the Renesas RZ/V2N (R9A09G056) and RZ/V2H (R9A09G057) SoCs, shared
by driver and DT source files.
Add support for PLL2 to the R9A09G077 (RZ/T2H) clock definitions and
register it as the source for the high-speed SDHI clock (SDHI_CLKHS)
operating at 800MHz.
Also add fixed-factor clock PCLKAM derived from CLK_PLL4D1, and define
module clocks for SDHI0 and SDHI1, both of which use PCLKAM as their
clock source.
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/20250625141705.151383-3-prabhakar.mahadev-lad.rj@bp.renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Veristat is synced into the standalone repo, where it compiles without
kernel private dependencies. This patch fixes compilation errors in
standalone veristat.
Signed-off-by: Mykyta Yatsenko <yatsenko@meta.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20250702175622.358405-1-mykyta.yatsenko5@gmail.com
The base address can be accessed via the priv pointer already present in
struct pll_clk, making the separate base field redundant. Remove the base
member and its assignment.
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/20250624153049.462535-1-prabhakar.mahadev-lad.rj@bp.renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Add the SDHI high-speed clock (SDHI_CLKHS) definition for the Renesas
RZ/T2H (R9A09G077) and RZ/N2H (R9A09G087) SoCs. SDHI_CLKHS is used as
a core clock for the SDHI IP and operates at 800MHz.
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/20250625141705.151383-2-prabhakar.mahadev-lad.rj@bp.renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Add XSPI core clock definitions to the clock bindings for the Renesas
R9A09G056 and R9A09G057 SoCs. These clocks IDs are used to support XSPI
interface.
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/20250627204237.214635-2-prabhakar.mahadev-lad.rj@bp.renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
PINCTRL_RZV2M is selected by ARCH_R9A09G011, hence there is no need to
depend on the latter. Move the dependency on COMPILE_TEST to the symbol
prompt, like is done for all other auto-selected pin control symbols.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Link: https://lore.kernel.org/d74843e06f73cd4c6e822d65f606e6042a50a0b7.1750945516.git.geert+renesas@glider.be
Renesas SoC has chip number / chip name. Some SoC is using chip number,
and some SoC is using chip name on current Renesas pincontrol Kconfig.
Let's unify "pin control support for ${CHIP_NUMBER} (${CHIP_NAME}).
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/87bjqdraf1.wl-kuninori.morimoto.gx@renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Current Renesas Kconfig is randomly arranged. Let's sort it by
alphabetical/number order, same as Makefile.
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/87cyatrafh.wl-kuninori.morimoto.gx@renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
