This not only removes a lot of code, it also fixes the memleak of the DMA
memory when register_netdev() fails.
Signed-off-by: Rolf Eike Beer <eike-kernel@sf-tec.de>
[ rebased onto net-next/master; fixed error reporting ]
Signed-off-by: Sean Anderson <seanga2@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

This fixes several error paths to ensure they return an appropriate error
(instead of ENODEV).
Signed-off-by: Sean Anderson <seanga2@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

In order to differentiate between a missing bridge and an OOM condition,
return ERR_PTRs from quattro_pci_find. This also does some general linting
in the area.
Signed-off-by: Sean Anderson <seanga2@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

This already returns a proper error value, so pass it to the caller.
Signed-off-by: Rolf Eike Beer <eike-kernel@sf-tec.de>
Signed-off-by: Sean Anderson <seanga2@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Module versions are not very useful:

> The basic problem is, the version string does not identify the sources
> with enough accuracy. It says nothing about back ported fixes in
> stable kernels. It tells you nothing about vendor patches to the
> network core, etc.

https://lore.kernel.org/all/Yf6mtvA1zO7cdzr7@lunn.ch/

While we're at it, inline the author and use the driver name a bit more.
Signed-off-by: Sean Anderson <seanga2@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

I can't find a reference to it in the entire git history.
Signed-off-by: Rolf Eike Beer <eike-kernel@sf-tec.de>
Signed-off-by: Sean Anderson <seanga2@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Yang Yingliang says:

====================
net: dsa: remove unnecessary i2c_set_clientdata()

This patchset https://lore.kernel.org/all/20220921140524.3831101-8-yangyingliang@huawei.com/T/
removed all set_drvdata(NULL) in driver remove function.

i2c_set_clientdata() is another wrapper of set drvdata function, to follow
the same convention, remove i2c_set_clientdata() called in driver remove
function in drivers/net/dsa/.
====================

Link: https://lore.kernel.org/r/20220923143742.87093-1-yangyingliang@huawei.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

Remove unnecessary i2c_set_clientdata() in ->remove(), the driver_data
will be set to NULL in device_unbind_cleanup() after calling ->remove().
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Remove unnecessary i2c_set_clientdata() in ->remove(), the driver_data
will be set to NULL in device_unbind_cleanup() after calling ->remove().
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Remove unnecessary i2c_set_clientdata() in ->remove(), the driver_data
will be set to NULL in device_unbind_cleanup() after calling ->remove().
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Practical experience (and advice from Alexei) tell us that bitfields in
structs lead to un-optimized assembly code. I've verified this change
does lead to better x86_64 assembly, both via objdump and playing with
code snippets in godbolt.org.

Using scripts/bloat-o-meter shows the code size is reduced with 24
bytes for xdp_convert_buff_to_frame() that gets inlined e.g. in
i40e_xmit_xdp_tx_ring() which were used for microbenchmarking.

Microbenchmarking results do show improvements, but very small and
varying between 0.5 to 2 nanosec improvement per packet.

The member @metasize is changed from u8 to u32. Future users of this
area could split this into two u16 fields. I've also benchmarked with
two u16 fields showing equal performance gains and code size reduction.

The moved member @frame_sz doesn't change sizeof struct due to existing
padding. Like xdp_buff member @frame_sz is placed next to @flags, which
allows compiler to optimize assignment of these.
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Link: https://lore.kernel.org/r/166393728005.2213882.4162674859542409548.stgit@firesoulSigned-off-by: Jakub Kicinski <kuba@kernel.org>

Vladimir Oltean says:

====================
Improve tsn_lib selftests for future distributed tasks

Some of the boards I am working with are limited in the number of ports
that they offer, and as more TSN related selftests are added, it is
important to be able to distribute the work among multiple boards.
A large part of implementing that is ensuring network-wide
synchronization, but also permitting more streams of data to flow
through the network. There is the more important aspect of also
coordinating the timing characteristics of those streams, and that is
also something that is tackled, although not in this modest patch set.
The goal here is not to introduce new selftests yet, but just to lay a
better foundation for them. These patches are a part of the cleanup work
I've done while working on selftests for frame preemption. They are
regression-tested with psfp.sh.
====================

Link: https://lore.kernel.org/r/20220923210016.3406301-1-vladimir.oltean@nxp.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

We can make the phc2sys helper not only synchronize a PHC to
CLOCK_REALTIME, which is what it currently does, but also CLOCK_REALTIME
to a PHC, which is going to be needed in distributed TSN tests.

Instead of making the complexity of the arguments passed to
phc2sys_start() explode, we can let it figure out the sync direction
automatically, based on ptp4l's port states.

Towards that goal, pass just the path to the desired ptp4l instance's
UNIX domain socket, and remove the $if_name argument (from which it
derives the PHC). Also adapt the one caller from the ocelot psfp.sh
test. In the case of psfp.sh, phc2sys_start is able to properly figure
out that CLOCK_REALTIME is the source clock and swp1's PHC is the
destination, because of the way in which ptp4l_start for the
UDS_ADDRESS_SWP1 was called: with slave_only=false, so it will always
win the BMCA and always become the sync master between itself and $h1.
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Kurt Kanzenbach <kurt@linutronix.de>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Move the PID variable for the isochron receiver into a separate
namespace per stats port, to allow multiple receivers (and/or
orchestration daemons) to be instantiated by the same script.

Preserve the existing behavior by making isochron_do() use the default
stats TCP port of 5000.
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Kurt Kanzenbach <kurt@linutronix.de>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Switch ports will want to act as Boundary Clocks, which are configured
using ptp4l by specifying the "-i" argument multiple times.

Since we track a log file and a pid file for each ptp4l instance, and we
want to be compatible with the existing single-port callers of
ptp4l_start and ptp4l_stop, pass the interface list as a single string
of space-separated values. Based on this, we create a label for each
ptp4l instance, where the spaces are replaced with underscores
(ptp4l_start "eth0 eth1" generates "ptp4l_pid_eth0_eth1").
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Kurt Kanzenbach <kurt@linutronix.de>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

The extra_args argument ($3) of isochron_recv_start is overwritten with
uds ($2), if that argument exists.

This is currently not a problem, because the only TSN selftest
(ocelot/psfp.sh) omits remote sync so it does not specify to the
receiver a UNIX domain socket for ptp4l. So $uds is currently an empty
string.
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Kurt Kanzenbach <kurt@linutronix.de>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

This patch adds missing MODULE_DEVICE_TABLE definition which generates
correct modalias for automatic loading of this driver when it is built
as an external module.

Fixes: bc93e19d ("net: ethernet: adi: Add ADIN1110 support")
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Link: https://lore.kernel.org/r/20220922070438.586692-1-yangyingliang@huawei.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

SPI devices use the spi_device_id for module autoloading even on
systems using device tree, after commit 5fa6863b ("spi: Check
we have a spi_device_id for each DT compatible"), kernel warns as
follows since the spi_device_id is missing:

SPI driver mse102x has no spi_device_id for vertexcom,mse1021
SPI driver mse102x has no spi_device_id for vertexcom,mse1022

Add spi_device_id entries to silence the warnings, and ensure driver
module autoloading works.
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>

Link: https://lore.kernel.org/r/20220922065717.1448498-1-weiyongjun@huaweicloud.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

In case of error, the function get_phy_device() returns ERR_PTR()
and never returns NULL. The NULL test in the return value check
should be replaced with IS_ERR().

Fixes: bc93e19d ("net: ethernet: adi: Add ADIN1110 support")
Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Link: https://lore.kernel.org/r/20220922021023.811581-1-weiyongjun@huaweicloud.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

Arun Ramadoss says:

====================
net: dsa: microchip: ksz9477: enable interrupt for internal phy link detection

This patch series implements the common interrupt handling for ksz9477 based
switches and lan937x. The ksz9477 and lan937x has similar interrupt registers
except ksz9477 has 4 port based interrupts whereas lan937x has 6 interrupts.
The patch moves the phy interrupt hanler implemented in lan937x_main.c to
ksz_common.c, along with the mdio_register functionality.
====================

Link: https://lore.kernel.org/r/20220922071028.18012-1-arun.ramadoss@microchip.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

Config_intr and handle_interrupt are enabled for ksz9477 phy. It is
similar to all other phys in the micrel phys.
Signed-off-by: Arun Ramadoss <arun.ramadoss@microchip.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

The global port interrupt routines and individual ports interrupt
routines has similar implementation except the mask & status register
and number of nested irqs in them.  The mask & status register and
pointer to ksz_device is added to ksz_irq and uses the ksz_irq as
irq_chip_data.
Signed-off-by: Arun Ramadoss <arun.ramadoss@microchip.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

To support the phy link detection through interrupt method for ksz9477
based switch, the interrupt handling routines are moved from
lan937x_main.c to ksz_common.c. The only changes made are functions
names are prefixed with ksz_ instead of lan937x_.
Signed-off-by: Arun Ramadoss <arun.ramadoss@microchip.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Currently, if the mdio node is not present in the dts file then
lan937x_mdio_register return -ENODEV and entire probing process fails.
To make the mdio_register generic for all ksz series switches and to
maintain back-compatibility with existing dts file, return -ENODEV is
replaced with return 0.
Signed-off-by: Arun Ramadoss <arun.ramadoss@microchip.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

In the lan937x_mdio_register function, phy interrupts are enabled
irrespective of irq is enabled in the switch. Now, the check is added to
enable the phy interrupt only if the irq is enabled in the switch.
Signed-off-by: Arun Ramadoss <arun.ramadoss@microchip.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Currently the number of port irqs is hard coded for the lan937x switch
as 6. In order to make the generic interrupt handler for ksz switches,
number of port irq supported by the switch is added to the
ksz_chip_data. It is 4 for ksz9477, 2 for ksz9897 and 3 for ksz9567.
Signed-off-by: Arun Ramadoss <arun.ramadoss@microchip.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

taprio_dev_notifier() subscribes to netdev state changes in order to
determine whether interfaces which have a taprio root qdisc have changed
their link speed, so the internal calculations can be adapted properly.

The 'qdev' temporary variable serves no purpose, because we just use it
only once, and can just as well use qdisc_dev(q->root) directly (or the
"dev" that comes from the netdev notifier; this is because qdev is only
interesting if it was the subject of the state change, _and_ its root
qdisc belongs in the taprio list).

The 'found' variable also doesn't really serve too much of a purpose
either; we can just call taprio_set_picos_per_byte() within the loop,
and exit immediately afterwards.
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Vinicius Costa Gomes <vinicius.gomes@intel.com>
Link: https://lore.kernel.org/r/20220923145921.3038904-1-vladimir.oltean@nxp.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

Gaosheng Cui says:

====================
Remove useless inline functions from net
====================

Link: https://lore.kernel.org/r/20220922083857.1430811-1-cuigaosheng1@huawei.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

All uses of dst_hold_and_use() have
been removed since commit 1202cdd6 ("Remove DECnet support
from kernel"), so remove it.
Signed-off-by: Gaosheng Cui <cuigaosheng1@huawei.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

All uses of sk_nulls_node_init() have
been removed since commit dbca1596 ("ping: convert to RCU
lookups, get rid of rwlock"), so remove it.
Signed-off-by: Gaosheng Cui <cuigaosheng1@huawei.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

All uses of neigh_key_eq16() have
been removed since commit 1202cdd6 ("Remove DECnet support
from kernel"), so remove it.
Signed-off-by: Gaosheng Cui <cuigaosheng1@huawei.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Remove all the code about SFTR-V2 Register which have been
deprecated since commit 77b7f83d ("mlxsw: Enable unified
bridge model").
Signed-off-by: Gaosheng Cui <cuigaosheng1@huawei.com>
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

As pointed out during review, currently the following set of commands
crashes the kernel:

$ ip netns add ns0
$ ip link set swp0 netns ns0
$ ip netns del ns0
WARNING: CPU: 1 PID: 27 at net/core/dev.c:10884 unregister_netdevice_many+0xaa4/0xaec
Workqueue: netns cleanup_net
pstate: 20000005 (nzCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : unregister_netdevice_many+0xaa4/0xaec
lr : unregister_netdevice_many+0x700/0xaec
Call trace:
 unregister_netdevice_many+0xaa4/0xaec
 default_device_exit_batch+0x294/0x340
 ops_exit_list+0xac/0xc4
 cleanup_net+0x2e4/0x544
 process_one_work+0x4ec/0xb40
---[ end trace 0000000000000000 ]---
unregister_netdevice: waiting for swp0 to become free. Usage count = 2

This is because since DSA user ports, since they started populating
dev->rtnl_link_ops in the blamed commit, gained a different treatment
from default_device_exit_net(), which thinks these interfaces can now be
unregistered.

They can't; so set netns_refund = true to restore the behavior prior to
populating dev->rtnl_link_ops.

Fixes: 95f510d0 ("net: dsa: allow the DSA master to be seen and changed through rtnetlink")
Suggested-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Link: https://lore.kernel.org/r/20220921185428.1767001-1-vladimir.oltean@nxp.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

During LPC2022 I meetup with my page_pool co-maintainer Ilias. When
discussing page_pool code we realised/remembered certain optimizations
had not been fully utilised.

Since commit c07aea3e ("mm: add a signature in struct page") struct
page have a direct pointer to the page_pool object this page was
allocated from.

Thus, with this info it is possible to skip the rhashtable_lookup to
find the page_pool object in __xdp_return().

The rcu_read_lock can be removed as it was tied to xdp_mem_allocator.
The page_pool object is still safe to access as it tracks inflight pages
and (potentially) schedules final release from a work queue.

Created a micro benchmark of XDP redirecting from mlx5 into veth with
XDP_DROP bpf-prog on the peer veth device. This increased performance
6.5% from approx 8.45Mpps to 9Mpps corresponding to using 7 nanosec
(27 cycles at 3.8GHz) less per packet.
Suggested-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Acked-by: Toke Høiland-Jørgensen <toke@redhat.com>
Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Link: https://lore.kernel.org/r/166377993287.1737053.10258297257583703949.stgit@firesoulSigned-off-by: Jakub Kicinski <kuba@kernel.org>

Rockchip RV1126 has GMAC 10/100/1000M ethernet controller
via RGMII and RMII interfaces are configured via M0 and M1 pinmux.

This patch adds rv1126 support by adding delay lines of M0 and M1
simultaneously.
Signed-off-by: Sugar Zhang <sugar.zhang@rock-chips.com>
Signed-off-by: David Wu <david.wu@rock-chips.com>
Signed-off-by: Anand Moon <anand@edgeble.ai>
Signed-off-by: Jagan Teki <jagan@edgeble.ai>
Link: https://lore.kernel.org/r/20220920140944.2535-2-anand@edgeble.aiSigned-off-by: Jakub Kicinski <kuba@kernel.org>

Add compatible string for RV1126 gmac, and constrain it to
be compatible with Synopsys dwmac 4.20a.
Reviewed-by: Heiko Stuebner <heiko@sntech.de>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Jagan Teki <jagan@edgeble.ai>
Signed-off-by: Anand Moon <anand@edgeble.ai>
Link: https://lore.kernel.org/r/20220920140944.2535-1-anand@edgeble.aiSigned-off-by: Jakub Kicinski <kuba@kernel.org>

Similar to udp_read_skb(), delete the unnecessary while loop in
unix_read_skb() for readability.  Since recv_actor() cannot return a
value greater than skb->len (see sk_psock_verdict_recv()), remove the
redundant check.
Suggested-by: Cong Wang <cong.wang@bytedance.com>
Signed-off-by: Peilin Ye <peilin.ye@bytedance.com>
Link: https://lore.kernel.org/r/7009141683ad6cd3785daced3e4a80ba0eb773b5.1663909008.git.peilin.ye@bytedance.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

Delete the unnecessary while loop in udp_read_skb() for readability.
Additionally, since recv_actor() cannot return a value greater than
skb->len (see sk_psock_verdict_recv()), remove the redundant check.
Suggested-by: Cong Wang <cong.wang@bytedance.com>
Signed-off-by: Peilin Ye <peilin.ye@bytedance.com>
Link: https://lore.kernel.org/r/343b5d8090a3eb764068e9f1d392939e2b423747.1663909008.git.peilin.ye@bytedance.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

Commit 0a28bfd4 added a metadata_dst to each tx_sc, but that's
only allocated when macsec_add_dev has run, which happens after device
registration. If the requested or computed SCI already exists, or if
linking to the lower device fails, we will panic because
metadata_dst_free can't handle NULL.

Reproducer:
    ip link add link $lower type macsec
    ip link add link $lower type macsec

Fixes: 0a28bfd4 ("net/macsec: Add MACsec skb_metadata_dst Tx Data path support")
Signed-off-by: Sabrina Dubroca <sd@queasysnail.net>
Acked-by: Raed Salem <raeds@nvidia.com>
Link: https://lore.kernel.org/r/60f2a1965fe553e2cade9472407d0fafff8de8ce.1663923580.git.sd@queasysnail.netSigned-off-by: Jakub Kicinski <kuba@kernel.org>

Blamed commit added a txhash parameter to tcp_v6_send_response()
but forgot to update tcp_v6_send_reset() accordingly.

Fixes: aa51b80e ("ipv6: tcp: send consistent autoflowlabel in SYN_RECV state")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Link: https://lore.kernel.org/r/20220922165036.1795862-1-eric.dumazet@gmail.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>