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Add sysfs nodes for the frequency generator and signal counters.
Update SMA selector lists for these, and also add the new
'None', 'VCC' 'GND' selectors.
Signed-off-by: Jonathan Lemon <jonathan.lemon@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
The timecard now has 4 general purpose timestampers.
Signed-off-by: Jonathan Lemon <jonathan.lemon@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Input signals can be steered to any of the frequency counters.
The counter measures the frequency over a number of seconds:
echo 0 > freq1/seconds = turns off measurement
echo 1 > freq1/seconds = sets period & turns on measurment.
Signed-off-by: Jonathan Lemon <jonathan.lemon@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
The signal generators can be programmed either via the sysfs
file or through a PTP_CLK_REQ_PEROUT ioctl request.
Signed-off-by: Jonathan Lemon <jonathan.lemon@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Newer firmware provides 4 programmable signal generators, add
support for those here. The signal generators provide the
ability to set the period, duty cycle, phase offset, and polarity,
with new values defaulting to prior values.
The period and phase offset are specified in nanoseconds.
E.g: period [duty [phase [polarity]]]
echo 500000000 > signal # 1/2 second period
echo 1000000 40 100 > signal # 1ms period, 40% on, offset 100ns
echo 0 > signal # turn off generator
Signed-off-by: Jonathan Lemon <jonathan.lemon@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Add the ability to group sysfs nodes behind a firmware feature
check. This way non-present sysfs attributes are omitted on
older firmware, which does not have newer features.
This will be used in the upcoming patches which adds more
features to the timecard.
Signed-off-by: Jonathan Lemon <jonathan.lemon@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
As there are may be 2 GNSS outputs, rename the first one for clarity.
This also works around a parsing issue when specifying selectors.
Signed-off-by: Jonathan Lemon <jonathan.lemon@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This adds support for the "IN: None" selector, which disables
the input on a sma pin. This should be compatible with old firmware
(the firmware will ignore it if not supported).
Signed-off-by: Jonathan Lemon <jonathan.lemon@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Assuming the firmware allows it, the direction of each SMA connector
is no longer fixed. Handle remapping directions for each pin.
Signed-off-by: Jonathan Lemon <jonathan.lemon@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
When doing manual injection of the frame, it is required to check if the
TX FIFO is ready to accept the next word of the frame. For this we are
using 'readx_poll_timeout_atomic', the only problem is that before it
actually checks the status, is determining the time when to finish polling
the status. Which seems to be an expensive operation.
Therefore check the status of the TX FIFO before calling
'readx_poll_timeout_atomic'.
Doing this will improve the TX bitrate by ~70%. Because 99% the FIFO is
ready by that time. The measurements were done using iperf3.
Before:
[ ID] Interval Transfer Bitrate Retr
[ 5] 0.00-10.03 sec 55.2 MBytes 46.2 Mbits/sec 0 sender
[ 5] 0.00-10.04 sec 53.8 MBytes 45.0 Mbits/sec receiver
After:
[ ID] Interval Transfer Bitrate Retr
[ 5] 0.00-10.10 sec 95.0 MBytes 78.9 Mbits/sec 0 sender
[ 5] 0.00-10.11 sec 95.0 MBytes 78.8 Mbits/sec receiver
Signed-off-by: Horatiu Vultur <horatiu.vultur@microchip.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
Remove dev_err() messages after platform_get_irq*() failures.
platform_get_irq() already prints an error.
Generated by: scripts/coccinelle/api/platform_get_irq.cocci
Signed-off-by: Yihao Han <hanyihao@vivo.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Commit bf08824a0f47 ("flow_dissector: Add support for HSR") added support for
HSR within the flow dissector. However, it only works for HSR in version
1. Version 0 uses a different Ether Type. Add support for it.
Reported-by: Anthony Harivel <anthony.harivel@linutronix.de>
Signed-off-by: Kurt Kanzenbach <kurt@linutronix.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
It is not recommened to use platform_get_resource(pdev, IORESOURCE_IRQ)
for requesting IRQ's resources any more, as they can be not ready yet in
case of DT-booting.
platform_get_irq() instead is a recommended way for getting IRQ even if
it was not retrieved earlier.
It also makes code simpler because we're getting "int" value right away
and no conversion from resource to int is required.
Reported-by: Zeal Robot <zealci@zte.com.cn>
Signed-off-by: Minghao Chi <chi.minghao@zte.com.cn>
Signed-off-by: David S. Miller <davem@davemloft.net>
platform_get_resource(pdev, IORESOURCE_IRQ, ..) relies on static
allocation of IRQ resources in DT core code, this causes an issue
when using hierarchical interrupt domains using "interrupts" property
in the node as this bypasses the hierarchical setup and messes up the
irq chaining.
In preparation for removal of static setup of IRQ resource from DT core
code use platform_get_irq() for DT users only.
While at it propagate error code in emac_dev_stop() in case
platform_get_irq_optional() fails.
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Convert am65-cpsw driver and am65-cpsw ethtool to use Phylink APIs
as described at Documentation/networking/sfp-phylink.rst. All calls
to Phy APIs are replaced with their equivalent Phylink APIs.
No functional change intended. Use Phylink instead of conventional
Phylib, in preparation to add support for SGMII/QSGMII modes.
Signed-off-by: Siddharth Vadapalli <s-vadapalli@ti.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Today's implementation of csum_shift() leads to branching based on
parity of 'offset'
000002f8 <csum_block_add>:
2f8: 70 a5 00 01 andi. r5,r5,1
2fc: 41 a2 00 08 beq 304 <csum_block_add+0xc>
300: 54 84 c0 3e rotlwi r4,r4,24
304: 7c 63 20 14 addc r3,r3,r4
308: 7c 63 01 94 addze r3,r3
30c: 4e 80 00 20 blr
Use first bit of 'offset' directly as input of the rotation instead of
branching.
000002f8 <csum_block_add>:
2f8: 54 a5 1f 38 rlwinm r5,r5,3,28,28
2fc: 20 a5 00 20 subfic r5,r5,32
300: 5c 84 28 3e rotlw r4,r4,r5
304: 7c 63 20 14 addc r3,r3,r4
308: 7c 63 01 94 addze r3,r3
30c: 4e 80 00 20 blr
And change to left shift instead of right shift to skip one more
instruction. This has no impact on the final sum.
000002f8 <csum_block_add>:
2f8: 54 a5 1f 38 rlwinm r5,r5,3,28,28
2fc: 5c 84 28 3e rotlw r4,r4,r5
300: 7c 63 20 14 addc r3,r3,r4
304: 7c 63 01 94 addze r3,r3
308: 4e 80 00 20 blr
Seems like only powerpc benefits from a branchless implementation.
Other main architectures like ARM or X86 get better code with
the generic implementation and its branch.
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: David S. Miller <davem@davemloft.net>
1) Leon removes useless includes from both mlx5 and mlx4
2) Tariq adds node awareness to some object allocations
3) Gal Cleanups and improvements to EEPROM query
4) Paul adds Software steering to Connection Tracking, to speed up
CT Rules insertion.
Paul Blakey Says:
=================
To improve insertion rate, this series allows for using software
steering API directly instead of going through the fs_core layer.
This can be done for CT because it doesn't need fs_core layer extra
facilities, such as autogroups, FTE IDs and modifications (which require
a copy of the flow key/mask). Skipping fs_core layer also allows to
create the software steering objects (dr_* objects) ahead of time and
re-use them for multiple rules, whereas software steering under fs_core
creates them on the fly and discards them. This in turn increased insertion
rate.
The series first introduces a lightweight CT flow steering provider
with the first implementations using fs_core layer, and moves CT to use it.
The next patches implement a provider using software steering directly,
bypassing fs_core, and uses it if software steering is available.
=================
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Merge tag 'mlx5-updates-2022-03-10' of git://git.kernel.org/pub/scm/linux/kernel/git/saeed/linux
Saeed Mahameed says:
====================
mlx5-updates-2022-03-10
1) Leon removes useless includes from both mlx5 and mlx4
2) Tariq adds node awareness to some object allocations
3) Gal Cleanups and improvements to EEPROM query
4) Paul adds Software steering to Connection Tracking, to speed up
CT Rules insertion.
Paul Blakey Says:
=================
To improve insertion rate, this series allows for using software
steering API directly instead of going through the fs_core layer.
This can be done for CT because it doesn't need fs_core layer extra
facilities, such as autogroups, FTE IDs and modifications (which require
a copy of the flow key/mask). Skipping fs_core layer also allows to
create the software steering objects (dr_* objects) ahead of time and
re-use them for multiple rules, whereas software steering under fs_core
creates them on the fly and discards them. This in turn increased insertion
rate.
The series first introduces a lightweight CT flow steering provider
with the first implementations using fs_core layer, and moves CT to use it.
The next patches implement a provider using software steering directly,
bypassing fs_core, and uses it if software steering is available.
=================
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Unlike the legacy EEPROM callbacks, when using the netlink EEPROM query
(get_module_eeprom_by_page) the driver should not try to validate the
query parameters, but just perform the read requested by the userspace.
Recent discussion in the mailing list:
https://lore.kernel.org/netdev/20220120093051.70845141@kicinski-fedora-PC1C0HJN.hsd1.ca.comcast.net/
Signed-off-by: Gal Pressman <gal@nvidia.com>
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: Maxim Mikityanskiy <maximmi@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
The assumption that the first byte in the module mapping dword is the
module number shouldn't be hard-coded in the driver, but come from
mlx5_ifc structs.
While at it, fix the incorrect width for the 'rx_lane' and 'tx_lane'
fields.
Signed-off-by: Gal Pressman <gal@nvidia.com>
Reviewed-by: Maxim Mikityanskiy <maximmi@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
The MCIA register supports either 12 or 32 dwords, use the correct value
by querying the capability from the MCAM register.
Signed-off-by: Gal Pressman <gal@nvidia.com>
Reviewed-by: Maxim Mikityanskiy <maximmi@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
SMFS dr matchers are processed sequentially in hardware according to
their priorities, and not skipped if empty.
Currently, smfs ct fs creates four predefined dr matchers per ct
table (ct/ct nat) with hardcoded priority. Compared to dmfs ct fs
using autogroups, this might cause additional hops in fastpath for
traffic patterns that match later priorties, even if previous
priorites are empty, e.g user only using ipv6 UDP traffic will
have additional 3 hops.
Create the matchers dynamically, using the highest priority available,
on first rule usage, and remove them on last usage.
Signed-off-by: Paul Blakey <paulb@nvidia.com>
Reviewed-by: Oz Shlomo <ozsh@nvidia.com>
Reviewed-by: Roi Dayan <roid@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
fs_core layer adds extra book keeping that is either unneeded for CT, or
unused by the underlying software steering, such as allocating FTEs and
FTE ids, saving the match key and mask, and autogroups management.
On top of that, direct steering has a translation layer (fs_dr) from PRM
commands to direct steering objects, for example, creating temporary
dr_action objects. This has a performance impact when dealing
with CT high insertion rate.
To use direct steering (smfs) directly for ct, add a tc ct fs smfs
implementation. Instead of dmfs autogroups, smfs ct fs uses one of 4
predefined dr matchers in CT and CT-NAT tables, for each combination
of tuple ethertype (ipv4/ipv6), and tuple ip_proto (udp/tcp) that
is currently used by nf flow table flow offload.
At rule insertions, validate the flow rule fits one of the predfined
matcher, and insert to it.
To fill the dr_actions of the rule efficiently, create the fwd to post_ct
tbl dr_action at fs init, the count dr_action at counter creation,
and re-use the already pre-allocated modify header dr_action.
Signed-off-by: Paul Blakey <paulb@nvidia.com>
Reviewed-by: Oz Shlomo <ozsh@nvidia.com>
Reviewed-by: Roi Dayan <roid@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
Add a thin layer that exports selected direct steering (dr) API
which will be used by a ct fs implementation in a following
patch.
Signed-off-by: Paul Blakey <paulb@nvidia.com>
Reviewed-by: Mark Bloch <mbloch@nvidia.com>
Reviewed-by: Roi Dayan <roid@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
If sw steering was used to create the table, dr steeering fs creates
a backing dr table for the mlx5 flow table.
Add helper to return this table so it can be used to create matchers and
add rules on it directly instead of passing via eswitch_offloads/fs_core
insertion.
Signed-off-by: Paul Blakey <paulb@nvidia.com>
Reviewed-by: Oz Shlomo <ozsh@nvidia.com>
Reviewed-by: Roi Dayan <roid@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
Currently, fs_core layer provides flow steering services to the driver
including: autogroups, allocating FTEs (flow table entries) and FTE ids,
and support of fte action modification. If then software steering is
configured, rule insertion will go through a translation layer from
firmware buffers to software steering objects (see fs_dr.c).
The connection tracking table is a system table that is not directly
controlled by the user and is a very high scale table. These fs_core
services introduces an overhead that may be optimized by using software
steering API directly.
Introduce ct flow steering interface to allow multiple flow steering
providers. Use the new interface to implement the current dmfs (device
managed flow steering) provider which uses fs_core insertion.
Signed-off-by: Paul Blakey <paulb@nvidia.com>
Reviewed-by: Oz Shlomo <ozsh@nvidia.com>
Reviewed-by: Roi Dayan <roid@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
The function is node-aware and gets the node as an argument.
Use a node-aware allocation for the doorbell pgdir structure.
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Reviewed-by: Moshe Shemesh <moshe@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
There is no need in include of module.h in the following files.
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
Alex Elder says:
====================
net: ipa: use bulk interconnect interfaces
The IPA code currently enables and disables interconnects by setting
the bandwidth of each to a non-zero value, or to zero. The
interconnect API now supports enable/disable functions, so we can
use those instead. In addition, the interconnect API provides bulk
interfaces that allow all interconnects to be operated on at once.
This series converts the IPA driver to use the bulk enable and
disable interfaces. In the process it uses some existing data
structures rather than defining new ones.
====================
Link: https://lore.kernel.org/r/20220309192037.667879-1-elder@linaro.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
The ipa_power structure contains a copy of the IPA device pointer,
so there's no need to pass it to ipa_interconnect_init(). We can
also use that pointer for an error message in ipa_power_enable().
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Rather than allocating the interconnect array dynamically, represent
the interconnects with a variable-length array at the end of the
ipa_power structure.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
The previous patch used bulk interconnect operations to initialize
IPA interconnects one at a time. This rearranges things to use the
bulk interfaces as intended--on all interconnects together. As a
result ipa_interconnect_init_one() and ipa_interconnect_exit_one()
are no longer needed.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Use of_icc_bulk_get() and icc_bulk_put(), icc_bulk_set_bw(), and
icc_bulk_enable() and icc_bulk_disable() to initialize individual
IPA interconnects. Those functions already log messages in the
event of error so we don't need to.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
The power interconnect array is now an array of icc_bulk_data
structures, which is what the interconnect bulk enable and disable
functions require.
Get rid of ipa_interconnect_enable() and ipa_interconnect_disable(),
and just call icc_bulk_enable() and icc_bulk_disable() instead.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
The interconnect framework now provides the ability to enable and
disable interconnects without having to change their recorded
"enabled" bandwidth value. Use this mechanism, rather than setting
the bandwidth values to zero and non-zero respectively to disable
and enable the IPA interconnects.
Disable each interconnect before setting its "enabled" average and
peak bandwidth values. Thereafter, enable and disable interconnects
when required rather than setting their bandwidths.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
The ipa_interconnect structure contains an icc_path pointer, plus an
average and peak bandwidth value. Other than the interconnect name,
this matches the icc_bulk_data structure exactly.
Use the icc_bulk_data structure in place of the ipa_interconnect
structure, and add an initialization of its name field. Then get
rid of the now unnecessary ipa_interconnect structure definition.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
The serial port driver attempts to test for correct THRE behavior
on startup. However, it does this by disabling interrupts, and
then intentionally trying to trigger an interrupt in order to see
if the IIR bit is set in the UART.
However, in this FPGA design, the UART interrupt is generated
through the MSI vector, so when interrupts are re-enabled after
the test, the DMAR-IR reports an unhandled IRTE entry, since
no irq handler is installed at this point - it is installed
after the test.
This only happens on the /second/ open of the UART, since on the
first open, the x86_vector has installed and activated by the
driver probe, and is correctly handled. When the serial port is
closed for the first time, this vector is deactivated and removed,
leading to this error.
Signed-off-by: Jonathan Lemon <jonathan.lemon@gmail.com>
Link: https://lore.kernel.org/r/20220309223427.34745-1-jonathan.lemon@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Previous commits introduced AF_XDP zero-copy support, in which
we need register different mem model for xdp_rxq when AF_XDP
zero-copy is enabled or not. And this should be done after xdp_rxq
info is registered, which is not needed for ctrl port, otherwise
there complaints warnings: "Missing register, driver bug".
Fix this by not registering mem model for ctrl port, just like we
don't register xdp_rxq info for ctrl port.
Fixes: 6402528b7a0b ("nfp: xsk: add AF_XDP zero-copy Rx and Tx support")
Signed-off-by: Yinjun Zhang <yinjun.zhang@corigine.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund@corigine.com>
Signed-off-by: Simon Horman <simon.horman@corigine.com>
Link: https://lore.kernel.org/r/20220309135533.10162-1-simon.horman@corigine.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Tony Nguyen says:
====================
100GbE Intel Wired LAN Driver Updates 2022-03-09
This series contains updates to ice driver only.
Martyna implements switchdev filtering on inner EtherType field for
tunnels.
Marcin adds reporting of slowpath statistics for port representors.
Jonathan Toppins changes a non-fatal link error message from warning to
debug.
Maciej removes unnecessary checks in ice_clean_tx_irq().
Amritha adds support for ADQ to match outer destination MAC for tunnels.
* '100GbE' of git://git.kernel.org/pub/scm/linux/kernel/git/tnguy/next-queue:
ice: Add support for outer dest MAC for ADQ tunnels
ice: avoid XDP checks in ice_clean_tx_irq()
ice: change "can't set link" message to dbg level
ice: Add slow path offload stats on port representor in switchdev
ice: Add support for inner etype in switchdev
====================
Link: https://lore.kernel.org/r/20220309190315.1380414-1-anthony.l.nguyen@intel.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Property list (altname is a link "property") is wrapped
in a nlattr. nlattrs length is 16bit so practically
speaking the list of properties can't be longer than
that, otherwise user space would have to interpret
broken netlink messages.
Prevent the problem from occurring by checking the length
of the property list before adding new entries.
Reported-by: George Shuklin <george.shuklin@gmail.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
George reports that altnames can eat up kernel memory.
We should charge that memory appropriately.
Reported-by: George Shuklin <george.shuklin@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Few years ago OVS user space made a strange choice in the commit [1]
to define types only valid for the user space inside the copy of a
kernel uAPI header. '#ifndef __KERNEL__' and another attribute was
added later.
This leads to the inevitable clash between user space and kernel types
when the kernel uAPI is extended. The issue was unveiled with the
addition of a new type for IPv6 extension header in kernel uAPI.
When kernel provides the OVS_KEY_ATTR_IPV6_EXTHDRS attribute to the
older user space application, application tries to parse it as
OVS_KEY_ATTR_PACKET_TYPE and discards the whole netlink message as
malformed. Since OVS_KEY_ATTR_IPV6_EXTHDRS is supplied along with
every IPv6 packet that goes to the user space, IPv6 support is fully
broken.
Fixing that by bringing these user space attributes to the kernel
uAPI to avoid the clash. Strictly speaking this is not the problem
of the kernel uAPI, but changing it is the only way to avoid breakage
of the older user space applications at this point.
These 2 types are explicitly rejected now since they should not be
passed to the kernel. Additionally, OVS_KEY_ATTR_TUNNEL_INFO moved
out from the '#ifdef __KERNEL__' as there is no good reason to hide
it from the userspace. And it's also explicitly rejected now, because
it's for in-kernel use only.
Comments with warnings were added to avoid the problem coming back.
(1 << type) converted to (1ULL << type) to avoid integer overflow on
OVS_KEY_ATTR_IPV6_EXTHDRS, since it equals 32 now.
[1] beb75a40fdc2 ("userspace: Switching of L3 packets in L2 pipeline")
Fixes: 28a3f0601727 ("net: openvswitch: IPv6: Add IPv6 extension header support")
Link: https://lore.kernel.org/netdev/3adf00c7-fe65-3ef4-b6d7-6d8a0cad8a5f@nvidia.com
Link: beb75a40fd
Reported-by: Roi Dayan <roid@nvidia.com>
Signed-off-by: Ilya Maximets <i.maximets@ovn.org>
Acked-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Acked-by: Aaron Conole <aconole@redhat.com>
Link: https://lore.kernel.org/r/20220309222033.3018976-1-i.maximets@ovn.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This enables non-standard MTUs on a per-port basis, with the overall
frame size set based on the CPU port.
When the MTU is not changed, this should have no effect.
Long packets crash the switch with MTUs of greater than 2526, so the
maximum is limited for now. Medium packets are sometimes dropped (e.g.
TCP over 2477, UDP over 2516-2519, ICMP over 2526), Hence an MTU value
of 2400 seems safe.
Signed-off-by: Thomas Nixon <tom@tomn.co.uk>
Signed-off-by: Aleksander Jan Bajkowski <olek2@wp.pl>
Link: https://lore.kernel.org/r/20220308230457.1599237-1-olek2@wp.pl
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Merge tag 'linux-can-next-for-5.18-20220310' of git://git.kernel.org/pub/scm/linux/kernel/git/mkl/linux-can-next
Marc Kleine-Budde says:
====================
pull-request: can-next 2022-03-10
The first 3 patches are by Oliver Hartkopp, target the CAN ISOTP
protocol and update the CAN frame sending behavior, and increases the
max PDU size to 64 kByte.
The next 2 patches are also by Oliver Hartkopp and update the virtual
VXCAN driver so that CAN frames send into the peer name space show up
as RX'ed CAN frames.
Vincent Mailhol contributes a patch for the etas_es58x driver to fix a
false positive dereference uninitialized variable warning.
2 patches by Ulrich Hecht add r8a779a0 SoC support to the rcar_canfd
driver.
The remaining 21 patches target the gs_usb driver and are by Peter
Fink, Ben Evans, Eric Evenchick and me. This series cleans up the
gs-usb driver, documents some bits of the USB ABI used by the widely
used open source firmware candleLight, adds support for up to 3 CAN
interfaces per USB device, adds CAN-FD support, adds quirks for some
hardware and software workarounds and finally adds support for 2 new
devices.
* tag 'linux-can-next-for-5.18-20220310' of git://git.kernel.org/pub/scm/linux/kernel/git/mkl/linux-can-next: (29 commits)
can: gs_usb: add VID/PID for ABE CAN Debugger devices
can: gs_usb: add VID/PID for CES CANext FD devices
can: gs_usb: add extended bt_const feature
can: gs_usb: activate quirks for CANtact Pro unconditionally
can: gs_usb: add quirk for CANtact Pro overlapping GS_USB_BREQ value
can: gs_usb: add usb quirk for NXP LPC546xx controllers
can: gs_usb: add CAN-FD support
can: gs_usb: use union and FLEX_ARRAY for data in struct gs_host_frame
can: gs_usb: support up to 3 channels per device
can: gs_usb: gs_usb_probe(): introduce udev and make use of it
can: gs_usb: document the PAD_PKTS_TO_MAX_PKT_SIZE feature
can: gs_usb: document the USER_ID feature
can: gs_usb: update GS_CAN_FEATURE_IDENTIFY documentation
can: gs_usb: add HW timestamp mode bit
can: gs_usb: gs_make_candev(): call SET_NETDEV_DEV() after handling all bt_const->feature
can: gs_usb: rewrap usb_control_msg() and usb_fill_bulk_urb()
can: gs_usb: rewrap error messages
can: gs_usb: GS_CAN_FLAG_OVERFLOW: make use of BIT()
can: gs_usb: sort include files alphabetically
can: gs_usb: fix checkpatch warning
...
====================
Link: https://lore.kernel.org/r/20220310142903.341658-1-mkl@pengutronix.de
Signed-off-by: Jakub Kicinski <kuba@kernel.org>