Add LAG support to this switch. In Documentation this is described as
trunk mode. A max of 4 LAGs are supported and each can support up to 4
port. The current tx mode supported is Hash mode with both L2 and L2+3
mode.
When no port are present in the trunk, the trunk is disabled in the
switch.
When a port is disconnected, the traffic is redirected to the other
available port.
The hash mode is global and each LAG require to have the same hash mode
set. To change the hash mode when multiple LAG are configured, it's
required to remove each LAG and set the desired hash mode to the last.
An error is printed when it's asked to set a not supported hadh mode.

Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>

The switch supports mirror mode. Only one port can set as mirror port and
every other port can set to both ingress and egress mode. The mirror
port is disabled and reverted to normal operation once every port is
removed from sending packet to it.

Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>

Ansuel Smith says:

====================
Multiple cleanup and feature for qca8k

This is a reduced version of the old massive series.
Refer to the changelog to know what is removed from this.

We clean and convert the driver to GENMASK FIELD_PREP to clean multiple
use of various naming scheme. (example we have a mix of _MASK, _S _M,
and various name) The idea is to ""simplify"" and remove some shift and
data handling by using FIELD API.
The patch contains various checkpatch warning and are ignored to not
create more mess in the header file. (fixing the too long line warning
would results in regs definition less readable)

We conver the driver to regmap API as ipq40xx SoC is based on the same
reg structure and we need to generilize the read/write access to split
the driver to commond and specific code.

The conversion to regmap is NOT done for the read/write/rmw operation,
the function are reworked to use the regmap helper instead.
This is done to keep the patch delta low but will come sooner or later
when the code will be split.
Any new feature will directly use the regmap helper and the reg
set/clear and the busy wait function are migrated to regmap helper as
the use of these function is low.

We also add a minor patch for MIB counter as qca8337 is missing 2 extra
counter, support for mdb and ageing settings.

v3:
- Try to reduce regmap conversion patch
v2:
- Move regmap init to sw_probe instead of moving switch id check.
- Removed LAGs, mirror extra features will come later in another
  smaller series.
- Squash 2 ageing patch
- Add more description about the regmap patch
- Rework mdb patch to do operation under the same lock
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

Add support for mdb add/del function. The ARL table is used to insert
the rule. The rule will be searched, deleted and reinserted with the
port mask updated. The function will check if the rule has to be updated
or insert directly with no deletion of the old rule.
If every port is removed from the port mask, the rule is removed.
The rule is set STATIC in the ARL table (aka it doesn't age) to not be
flushed by fast age function.

Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
Reviewed-by: Vladimir Oltean <olteanv@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

qca8k support setting ageing time in step of 7s. Add support for it and
set the max value accepted of 7645m.
Documentation talks about support for 10000m but that values doesn't
make sense as the value doesn't match the max value in the reg.

Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
Reviewed-by: Vladimir Oltean <olteanv@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

The switch supports fast aging by flushing any rule in the ARL
table for a specific port.

Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
Reviewed-by: Vladimir Oltean <olteanv@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

We are currently missing 2 additionals MIB counter present in QCA833x
switch.
QC832x switch have 39 MIB counter and QCA833X have 41 MIB counter.
Add the additional MIB counter and rework the MIB function to print the
correct supported counter from the match_data struct.

Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
Reviewed-by: Vladimir Oltean <olteanv@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Convert any qca8k set/clear/pool to regmap helper and add
missing config to regmap_config struct.
Read/write/rmw operation are reworked to use the regmap helper
internally to keep the delta of this patch low. These additional
function will then be dropped when the code split will be proposed.

Ipq40xx SoC have the internal switch based on the qca8k regmap but use
mmio for read/write/rmw operation instead of mdio.
In preparation for the support of this internal switch, convert the
driver to regmap API to later split the driver to common and specific
code. The overhead introduced by the use of regamp API is marginal as the
internal mdio will bypass it by using its direct access and regmap will be
used only by configuration functions or fdb access.

Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

In preparation for regmap conversion, move regmap init in the probe
function and make it mandatory as any read/write/rmw operation will be
converted to regmap API.

Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
Reviewed-by: Vladimir Oltean <olteanv@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Mutex is already init in sw_probe. Remove the extra init in qca8k_setup.

Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
Reviewed-by: Vladimir Oltean <olteanv@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Convert and try to standardize bit fields using
GENMASK/FIELD_PREP/FIELD_GET macros. Rework some logic to support the
standard macro and tidy things up. No functional change intended.

Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

The very next check for port 0 and 6 already makes sure we don't go out
of bounds with the ports_config delay table.
Remove the redundant check.

Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Ansuel Smith <ansuelsmth@gmail.com>
Reviewed-by: Vladimir Oltean <olteanv@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Kees Cook says:

====================
skbuff: Switch structure bounds to struct_group()

This is a pair of patches to add struct_group() to struct sk_buff. The
first is needed to work around sparse-specific complaints, and is new
for v2. The second patch is the same as originally sent as v1.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

In preparation for FORTIFY_SOURCE performing compile-time and run-time
field bounds checking for memcpy(), memmove(), and memset(), avoid
intentionally writing across neighboring fields.

Replace the existing empty member position markers "headers_start" and
"headers_end" with a struct_group(). This will allow memcpy() and sizeof()
to more easily reason about sizes, and improve readability.

"pahole" shows no size nor member offset changes to struct sk_buff.
"objdump -d" shows no object code changes (outside of WARNs affected by
source line number changes).

Signed-off-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Reviewed-by: Jason A. Donenfeld <Jason@zx2c4.com> # drivers/net/wireguard/*
Link: https://lore.kernel.org/lkml/20210728035006.GD35706@embeddedor
Signed-off-by: David S. Miller <davem@davemloft.net>

In preparation for using the struct_group() macro in struct sk_buff,
move the conditional preprocessor directives out of the region of struct
sk_buff that will be enclosed by struct_group(). While GCC and Clang are
happy with conditional preprocessor directives here, sparse is not, even
under -Wno-directive-within-macro[1], as would be seen under a C=1 build:

net/core/filter.c: note: in included file (through include/linux/netlink.h, include/linux/sock_diag.h):
./include/linux/skbuff.h:820:1: warning: directive in macro's argument list
./include/linux/skbuff.h:822:1: warning: directive in macro's argument list
./include/linux/skbuff.h:846:1: warning: directive in macro's argument list
./include/linux/skbuff.h:848:1: warning: directive in macro's argument list

Additionally remove empty macro argument definitions and usage.

"objdump -d" shows no object code differences.

[1] https://www.spinics.net/lists/linux-sparse/msg10857.html

Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

When checking an address is located in a global data section also check
for the .bss section as global variables initialized to 0 can be in
there (-fzero-initialized-in-bss).

This was found when looking at ensure_safe_net_sysctl which was failing
to detect non-init sysctl pointing to a global data section when the
data was in the .bss section.

Signed-off-by: Antoine Tenart <atenart@kernel.org>
Acked-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

proc_create_net() and remove_proc_entry() already contain the case
whether to define CONFIG_PROC_FS, so remove #ifdef CONFIG_PROC_FS.

Signed-off-by: Yajun Deng <yajun.deng@linux.dev>
Signed-off-by: David S. Miller <davem@davemloft.net>

'send_section_map' is a bitmap. So use 'bitmap_zalloc()' to simplify code,
improve the semantic and avoid some open-coded arithmetic in allocator
arguments.

Also change the corresponding 'kfree()' into 'bitmap_free()' to keep
consistency.

While at it, change an '== NULL' test into a '!'.

Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: David S. Miller <davem@davemloft.net>

'cid_map' is a bitmap. So use 'bitmap_zalloc()' to simplify code,
improve the semantic and avoid some open-coded arithmetic in allocator
arguments.

Also change the corresponding 'kfree()' into 'bitmap_free()' to keep
consistency.

Also change some 'memset()' into 'bitmap_zero()' to keep consistency. This
is also much less verbose.

Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: David S. Miller <davem@davemloft.net>

The 'mask' bitmap is local to this function. So the non-atomic
'__set_bit()' can be used to save a few cycles.

Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: David S. Miller <davem@davemloft.net>

s/cold/could/

Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Acked-By: Devesh Sharma <devesh.s.sharma@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

There are three boolean variable which were not initialized and later
being used in the code.

Signed-off-by: Yacov Simhony <ysimhony@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

pcmcia_get_mac_from_cis is only called from networking and
recent changes made it call dev_addr_mod() which is itself
only defined if NET.

Reported-by: kernel test robot <lkp@intel.com>
Fixes: adeef3e ("net: constify netdev->dev_addr")
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

Due to const dev_addr changes.

Signed-off-by: David S. Miller <davem@davemloft.net>

This patch brings in support for device trace collection.
It implements relayfs interface for pushing device trace
from kernel space to user space.

Driver gets the debugfs base directory associated to WWAN
Device and creates trace_control and trace debugfs for
device tracing. Both trace_control & trace debugfs are
created under /sys/kernel/debug/wwan/wwan0/.

In order to collect device trace on trace0 interface, user
need to write 1 to trace_ctl interface.

Signed-off-by: M Chetan Kumar <m.chetan.kumar@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

This patch set brings in a common debugfs base directory
i.e. /sys/kernel/debugfs/wwan/ in WWAN Subsystem for a
WWAN device instance. So that it avoids driver polluting
debugfs root with unrelated directories & possible name
collusion.

Having a common debugfs base directory for WWAN drivers
eases user to match control devices with debugfs entries.

WWAN Subsystem creates dentry (/sys/kernel/debugfs/wwan)
on module load & removes dentry on module unload.

When driver registers a new wwan device, dentry (wwanX)
is created for WWAN device instance & on driver unregister
dentry is removed.

New API is introduced to return the wwan device instance
dentry so that driver can create debugfs entries under it.

Signed-off-by: M Chetan Kumar <m.chetan.kumar@linux.intel.com>
Reviewed-by: Loic Poulain <loic.poulain@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

Argument of a helper is missing a const.

Reported-by: kernel test robot <lkp@intel.com>
Fixes: adeef3e ("net: constify netdev->dev_addr")
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

Add support of XDP for the MANA driver.

Supported XDP actions:
	XDP_PASS, XDP_TX, XDP_DROP, XDP_ABORTED

XDP actions not yet supported:
	XDP_REDIRECT

Signed-off-by: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Gerhard Engleder says:

====================
TSN endpoint Ethernet MAC driver

This series adds a driver for my FPGA based TSN endpoint Ethernet MAC.
It also includes the device tree binding.

The device is designed as Ethernet MAC for TSN networks. It will be used
in PLCs with real-time requirements up to isochronous communication with
protocols like OPC UA Pub/Sub.

v3:
 - set MAC mode based on PHY information (Andrew Lunn)
 - remove/postpone loopback mode interface (Andrew Lunn)
 - add suppress_preamble node support (Andrew Lunn)
 - add mdio timeout (Andrew Lunn)
 - no need to call phy_start_aneg (Andrew Lunn)
 - remove unreachable code (Andrew Lunn)
 - move 'struct napi_struct' closer to queues (Vinicius Costa Gomes)
 - remove unused variable (kernel test robot)
 - switch from mdio interrupt to polling
 - mdio register without PHY address flag
 - thread safe interrupt enable register
 - add PTP_1588_CLOCK_OPTIONAL dependency to Kconfig
 - introduce dmadev for DMA allocation
 - mdiobus for platforms without device tree
 - prepare MAC address support for platforms without device tree
 - add missing interrupt disable to probe error path

v2:
 - add C45 check (Andrew Lunn)
 - forward phy_connect_direct() return value (Andrew Lunn)
 - use phy_remove_link_mode() (Andrew Lunn)
 - do not touch PHY directly, use PHY subsystem (Andrew Lunn)
 - remove management data lock (Andrew Lunn)
 - use phy_loopback (Andrew Lunn)
 - remove GMII2RGMII handling, use xgmiitorgmii (Andrew Lunn)
 - remove char device for direct TX/RX queue access (Andrew Lunn)
 - mdio node for mdiobus (Rob Herring)
 - simplify compatible node (Rob Herring)
 - limit number of items of reg and interrupts nodes (Rob Herring)
 - restrict phy-connection-type node (Rob Herring)
 - reference to mdio.yaml under mdio node (Rob Herring)
 - remove device tree (Michal Simek)
 - fix %llx warning (kernel test robot)
 - fix unused tmp variable warning (kernel test robot)
 - add missing of_node_put() for of_parse_phandle()
 - use devm_mdiobus_alloc()
 - simplify mdiobus read/write
 - reduce required nodes
 - ethtool priv flags interface for loopback
 - add missing static for some functions
 - remove obsolete hardware defines
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

The TSN endpoint Ethernet MAC is a FPGA based network device for
real-time communication.

It is integrated as Ethernet controller with ethtool and PTP support.
For real-time communcation TC_SETUP_QDISC_TAPRIO is supported.

Signed-off-by: Gerhard Engleder <gerhard@engleder-embedded.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

The TSN endpoint Ethernet MAC is a FPGA based network device for
real-time communication.

It is integrated as normal Ethernet controller with
ethernet-controller.yaml and mdio.yaml.

Signed-off-by: Gerhard Engleder <gerhard@engleder-embedded.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

Engleder develops FPGA based controllers for real-time communication.

Signed-off-by: Gerhard Engleder <gerhard@engleder-embedded.com>
Acked-by: Rob Herring <robh@kernel.org>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

Commit 4904b6e ("net: phy: phylink: Use PHY device interface if
N/A") introduced handling for the phy interface mode where this is not
known at phylink creation time. This was never added to the OF/fwnode
paths, but is necessary when the phy is present in DT, but the phy-mode
is not specified.

Add this handling.

Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Some devices expose memory-mapped c22-compliant PHYs. Because these
devices do not have an MDIO bus, we cannot use the existing helpers.
Refactor the existing helpers to allow supplying the values for c22
registers directly, instead of using MDIO to access them. Only get_state
and set_advertisement are converted, since they contain the most complex
logic. Because set_advertisement is never actually used outside
phylink_mii_c22_pcs_config, move the MDIO-writing part into that
function. Because some modes do not need the advertisement register set
at all, we use -EINVAL for this purpose.

Additionally, a new function phylink_pcs_enable_an is provided to
determine whether to enable autonegotiation.

Signed-off-by: Sean Anderson <sean.anderson@seco.com>
Reviewed-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>

dev->gso_max_segs is written under RTNL protection, or when the device is
not yet visible, but is read locklessly.

Add netif_set_gso_max_segs() helper.

Add the READ_ONCE()/WRITE_ONCE() pairs, and use netif_set_gso_max_segs()
where we can to better document what is going on.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>