We can benefit from TSO when the host CPU is not powerful enough,
so enable it by default now.
Signed-off-by: Yinjun Zhang <yinjun.zhang@corigine.com>
Reviewed-by: Louis Peens <louis.peens@corigine.com>
Signed-off-by: Simon Horman <simon.horman@corigine.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Packets with metadata prepended can be correctly handled in
firmware when TSO is enabled, now remove the error path and
related comments. Since there's no existing firmware that
uses prepended metadata, no need to add compatibility check
here.
Signed-off-by: Yinjun Zhang <yinjun.zhang@corigine.com>
Reviewed-by: Louis Peens <louis.peens@corigine.com>
Signed-off-by: Simon Horman <simon.horman@corigine.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

The functions of asix_set_sw/hw_mii are not called in other files, so
change them to static.
Signed-off-by: Zhengchao Shao <shaozhengchao@huawei.com>
Link: https://lore.kernel.org/r/20220704123448.128980-1-shaozhengchao@huawei.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

felix_vsc9959.c calls taprio_offload_get() and taprio_offload_free(),
symbols exported by net/sched/sch_taprio.c. As such, we must disallow
building the Felix driver as built-in when the symbol exported by
tc-taprio isn't present in the kernel image.

Fixes: 1c9017e4 ("net: dsa: felix: keep reference on entire tc-taprio config")
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Link: https://lore.kernel.org/r/20220704190241.1288847-2-vladimir.oltean@nxp.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

All callers of taprio_offload_get() and taprio_offload_free() prior to
the blamed commit are conditionally compiled based on CONFIG_NET_SCH_TAPRIO.

felix_vsc9959.c is different; it provides vsc9959_qos_port_tas_set()
even when taprio is compiled out.

Provide shim definitions for the functions exported by taprio so that
felix_vsc9959.c is able to compile. vsc9959_qos_port_tas_set() in that
case is dead code anyway, and ocelot_port->taprio remains NULL, which is
fine for the rest of the logic.

Fixes: 1c9017e4 ("net: dsa: felix: keep reference on entire tc-taprio config")
Reported-by: Colin Foster <colin.foster@in-advantage.com>
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Tested-by: Colin Foster <colin.foster@in-advantage.com>
Acked-by: Vinicius Costa Gomes <vinicius.gomes@intel.com>
Link: https://lore.kernel.org/r/20220704190241.1288847-1-vladimir.oltean@nxp.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

The last meaningful change to this driver was made by Jon in 2011.
As much as we'd like to believe that this is because the code is
perfect the chances are nobody is using this hardware.

Because of the size of this driver there is a nontrivial maintenance
cost to keeping this code around, in the last 2 years we're averaging
more than 1 change a month. Some of which require nontrivial review
effort, see commit 877fe9d4 ("Revert "drivers/net/ethernet/neterion/vxge:
Fix a use-after-free bug in vxge-main.c"") for example.

Let's try to remove this driver. In general, IMHO, we need to
establish a clear path for shedding dead code. It will be hard
to unless we have some experience trying to delete stuff.

Link: https://lore.kernel.org/r/20220701044234.706229-1-kuba@kernel.orgSigned-off-by: Jakub Kicinski <kuba@kernel.org>

The 'reg' property is missing from the mediatek,mt7530 schema which
results in the following warning once 'unevaluatedProperties' is fixed:

Documentation/devicetree/bindings/net/dsa/mediatek,mt7530.example.dtb: switch@0: Unevaluated properties are not allowed ('reg' was unexpected)

Fixes: e0dda311 ("dt-bindings: net: dsa: convert binding for mediatek switches")
Signed-off-by: Rob Herring <robh@kernel.org>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Link: https://lore.kernel.org/r/20220701222240.1706272-1-robh@kernel.orgSigned-off-by: Jakub Kicinski <kuba@kernel.org>

Use bitmap_zalloc()/bitmap_free() instead of hand-writing them.

It is less verbose and it improves the semantic.

While at it, remove a useless bitmap_zero(). The bitmap is already zeroed
when allocated.
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Link: https://lore.kernel.org/r/8a2168ef9871bd9c4f1cf19b8d5f7530662a5d15.1656866770.git.christophe.jaillet@wanadoo.frSigned-off-by: Paolo Abeni <pabeni@redhat.com>

We can't use the division operator on 64 bits integers, that breaks
32 bits build. Instead use the relevant helper.

Fixes: 6ddac26c ("net/mlx5e: Add support to modify hardware flow meter parameters")
Acked-by: Saeed Mahameed <saeedm@nvidia.com>
Link: https://lore.kernel.org/r/ecb00ddd1197b4f8a4882090206bd2eee1eb8b5b.1657005206.git.pabeni@redhat.comSigned-off-by: Paolo Abeni <pabeni@redhat.com>

Kuniyuki Iwashima says:

====================
af_unix: Fix regression by the per-netns hash table series.

The series 6dd4142f ("Merge branch 'af_unix-per-netns-socket-hash'")
replaced a global hash table with per-netns tables, which caused regression
reported in the links below. [0][1]

When a pathname socket is visible, any socket with the same type has to be
able to connect to it even in different netns.  The series puts all sockets
into each namespace's hash table, making it impossible to look up a visible
socket in different netns.

On the other hand, while dumping sockets, they are filtered by netns.  To
keep such code simple, let's add a new global hash table only for pathname
sockets and link them with sk_bind_node.  Then we can keep all sockets in
each per-netns table and look up pathname sockets via the global table.

[0]: https://lore.kernel.org/netdev/B2AA3091-796D-475E-9A11-0021996E1C00@linux.ibm.com/
[1]: https://lore.kernel.org/netdev/5fb8d86f-b633-7552-8ba9-41e42f07c02a@gmail.com/

Changes:
  v3:
    * 1st: Update changelog s/named/pathname/
    * 2nd: Fix checkpatch.pl CHECK by --strict option

  v2: https://lore.kernel.org/netdev/20220702014447.93746-1-kuniyu@amazon.com/
    * Add selftest

  v1: https://lore.kernel.org/netdev/20220701072519.96097-1-kuniyu@amazon.com/
====================

Link: https://lore.kernel.org/r/20220702154818.66761-1-kuniyu@amazon.comSigned-off-by: Paolo Abeni <pabeni@redhat.com>

This patch add a test that checks connect()ivity between two sockets:

    unnamed socket -> bound socket
                      * SOCK_STREAM or SOCK_DGRAM
                      * pathname or abstract
                      * same or different netns
Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

Commit cf2f225e ("af_unix: Put a socket into a per-netns hash table.")
accidentally broke user API for pathname sockets.  A socket was able to
connect() to a pathname socket whose file was visible even if they were in
different network namespaces.

The commit puts all sockets into a per-netns hash table.  As a result,
connect() to a pathname socket in a different netns fails to find it in the
caller's per-netns hash table and returns -ECONNREFUSED even when the task
can view the peer socket file.

We can reproduce this issue by:

  Console A:

    # python3
    >>> from socket import *
    >>> s = socket(AF_UNIX, SOCK_STREAM, 0)
    >>> s.bind('test')
    >>> s.listen(32)

  Console B:

    # ip netns add test
    # ip netns exec test sh
    # python3
    >>> from socket import *
    >>> s = socket(AF_UNIX, SOCK_STREAM, 0)
    >>> s.connect('test')

Note when dumping sockets by sock_diag, procfs, and bpf_iter, they are
filtered only by netns.  In other words, even if they are visible and
connect()able, all sockets in different netns are skipped while iterating
sockets.  Thus, we need a fix only for finding a peer pathname socket.

This patch adds a global hash table for pathname sockets, links them with
sk_bind_node, and uses it in unix_find_socket_byinode().  By doing so, we
can keep sockets in per-netns hash tables and dump them easily.

Thanks to Sachin Sant and Leonard Crestez for reports, logs and a reproducer.

Fixes: cf2f225e ("af_unix: Put a socket into a per-netns hash table.")
Reported-by: Sachin Sant <sachinp@linux.ibm.com>
Reported-by: Leonard Crestez <cdleonard@gmail.com>
Tested-by: Sachin Sant <sachinp@linux.ibm.com>
Tested-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Tested-by: Leonard Crestez <cdleonard@gmail.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

Fix spelling of 'waitting' in comments.
remove unnecessary space of 'MDIO_COMMAND_REG 's'.
Signed-off-by: Zhang Jiaming <jiaming@nfschina.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Simon Horman says:

====================
nfp: support VLAN strip and insert

this series adds support to the NFP driver for HW offload of both:

* RX VLAN ctag/stag strip
* TX VLAN ctag insert
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

Add support for TX VLAN ctag insert
which may be configured via ethtool.

e.g.
     # ethtool -K $DEV tx-vlan-offload on

The NIC supplies VLAN insert information as packet metadata.
The fields of this VLAN metadata are gotten from sk_buff, including
vlan_proto and vlan tag.

Configuration control bit NFP_NET_CFG_CTRL_TXVLAN_V2 is to
signal availability of ctag-insert features of the firmware.

NFDK is used to communicate via PCIE to NFP-3800 based NICs
while NFD3 is used for other NICs supported by the NFP driver.
The metadata format on tx side of NFD3 is different from NFDK.
This feature is not currently implemented for NFDK.
Signed-off-by: Diana Wang <na.wang@corigine.com>
Reviewed-by: Louis Peens <louis.peens@corigine.com>
Signed-off-by: Simon Horman <simon.horman@corigine.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Add support for RX VLAN ctag/stag strip
which may be configured via ethtool.

e.g.
     # ethtool -K $DEV rx-vlan-offload on
     # ethtool -K $DEV rx-vlan-stag-hw-parse on

Ctag-stripped and stag-stripped cannot be enabled at the same time
because currently the kernel supports only one layer of VLAN stripping.

The NIC supplies VLAN strip information as packet metadata.
The fields of this VLAN metadata are:

* strip flag: 1 for stripped; 0 for unstripped
* tci: VLAN TCI ID
* tpid: 1 for ETH_P_8021AD; 0 for ETH_P_8021Q

Configuration control bits NFP_NET_CFG_CTRL_RXVLAN_V2 and
NFP_NET_CFG_CTRL_RXQINQ are to signal availability of
ctag-strip and stag-strip features of the firmware.
Signed-off-by: Diana Wang <na.wang@corigine.com>
Reviewed-by: Louis Peens <louis.peens@corigine.com>
Signed-off-by: Simon Horman <simon.horman@corigine.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Lukas Wunner says:

====================
Deadlock no more in LAN95xx

Second attempt at fixing a runtime resume deadlock in the LAN95xx USB driver:

In short, the driver isn't using the "nopm" register accessors in portions
of its runtime resume path, causing a deadlock.  I'm fixing that by
auto-detecting whether nopm accessors shall be used, instead of
having to explicitly call them wherever it's necessary.
As a byproduct, code size shrinks significantly (see diffstat below).

Back in April I submitted a first attempt which was rejected by Alan Stern:
https://lore.kernel.org/all/6710d8c18ff54139cdc538763ba544187c5a0cee.1651041411.git.lukas@wunner.de/

That approach only detected whether a PM callback is running concurrently,
not whether the access is performed by the PM callback.  I've come up with
a different approach which should resolve the objection (see patch [1/3]).
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

smsc95xx_read_reg() and smsc95xx_write_reg() call BUG_ON() if the
struct usbnet pointer passed in is NULL.

The functions have just been amended to dereference the pointer on
entry.  So the kernel now oopses if the pointer is NULL, eliminating
the need for an explicit BUG_ON().
Signed-off-by: Lukas Wunner <lukas@wunner.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

The LAN95xx driver has just been amended to auto-detect whether the
_nopm variant of usbnet_read_cmd() / usbnet_write_cmd() shall be used.

Drop all the now unnecessary open coding of that distinction.
Signed-off-by: Lukas Wunner <lukas@wunner.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

Commit 05b35e7e ("smsc95xx: add phylib support") amended
smsc95xx_resume() to call phy_init_hw().  That function waits for the
device to runtime resume even though it is placed in the runtime resume
path, causing a deadlock.

The problem is that phy_init_hw() calls down to smsc95xx_mdiobus_read(),
which never uses the _nopm variant of usbnet_read_cmd().

Commit b4df480f ("usbnet: smsc95xx: add reset_resume function with
reset operation") causes a similar deadlock on resume if the device was
already runtime suspended when entering system sleep:

That's because the commit introduced smsc95xx_reset_resume(), which
calls down to smsc95xx_reset(), which neglects to use _nopm accessors.

Fix by auto-detecting whether a device access is performed by the
suspend/resume task_struct and use the _nopm variant if so.  This works
because the PM core guarantees that suspend/resume callbacks are run in
task context.

Stacktrace for posterity:

  INFO: task kworker/2:1:49 blocked for more than 122 seconds.
  Workqueue: usb_hub_wq hub_event
  schedule
  rpm_resume
  __pm_runtime_resume
  usb_autopm_get_interface
  usbnet_read_cmd
  __smsc95xx_read_reg
  __smsc95xx_phy_wait_not_busy
  __smsc95xx_mdio_read
  smsc95xx_mdiobus_read
  __mdiobus_read
  mdiobus_read
  smsc_phy_reset
  phy_init_hw
  smsc95xx_resume
  usb_resume_interface
  usb_resume_both
  usb_runtime_resume
  __rpm_callback
  rpm_callback
  rpm_resume
  __pm_runtime_resume
  usb_autoresume_device
  hub_event
  process_one_work

Fixes: b4df480f ("usbnet: smsc95xx: add reset_resume function with reset operation")
Signed-off-by: Lukas Wunner <lukas@wunner.de>
Cc: stable@vger.kernel.org # v3.16+
Cc: Andre Edich <andre.edich@microchip.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Add support for BCM53128 internal PHYs. These support interrupts as well as
statistics. Therefore, enable the Broadcom PHY driver for them.

Tested on BCM53128 switch using the mainline b53 DSA driver.
Signed-off-by: Kurt Kanzenbach <kurt@linutronix.de>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Describe the switch interrupts (dlr, switch, prp, hub, pattern) which
are connected to the GIC.
Signed-off-by: Clément Léger <clement.leger@bootlin.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: David S. Miller <davem@davemloft.net>

Tests that permanent mdb entries can be added/deleted on ports with state down.
Signed-off-by: Casper Andersson <casper.casan@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

The strlcpy should not be used because it doesn't limit the source
length. Preferred is strscpy.
Signed-off-by: XueBing Chen <chenxuebing@jari.cn>
Signed-off-by: David S. Miller <davem@davemloft.net>

Ido Schimmel says:

====================
mlxsw: Unified bridge conversion - part 6/6

This is the sixth and final part of the conversion of mlxsw to the
unified bridge model. It transitions the last bits of functionality that
were under firmware's responsibility in the legacy model to the driver.
The last patches flip the driver to the unified bridge model and clean
up code that was used to make the conversion easier to review.

Patchset overview:

Patch #1 sets the egress VID for known unicast packets. For multicast
packets, the egress VID is configured using the MPE table. See commit
8c2da081 ("mlxsw: spectrum_fid: Configure egress VID classification
for multicast").

Patch #2 configures the VNI to FID classification that is used during
decapsulation.

Patch #3 configures ingress router interface (RIF) in FID classification
records, so that when a packet reaches the router block, its ingress RIF
is known. Care is taken to configure this in all the different flows
(e.g., RIF set on a FID, {Port, VID} joins a FID that already has a RIF
etc.).

Patch #4 configures the egress VID for routed packets. For such packets,
the egress VID is not set by the MPE table or by an FDB record at the
egress bridge, but instead by a dedicated table that maps {Egress RIF,
Egress port} to a VID.

Patch #5 removes VID configuration from RIF creation as in the unified
bridge model firmware no longer needs it.

Patch #6 sets the egress FID to use in RIF configuration so that the
device knows using which FID to bridge the packet after routing.

Patches #7-#9 add a new 802.1Q family and associated VLAN RIFs. In the
unified bridge model, we no longer need to emulate 802.1Q FIDs using
802.1D FIDs as VNI can be associated with both.

Patches #10-#11 finally flip the driver to the unified bridge model.

Patches #12-#13 clean up code that was used to make the conversion
easier to review.

v2:
* Fix build failure [1] in patch #1.

[1] https://lore.kernel.org/netdev/20220630201709.6e66a1bb@kernel.org/
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

Some structures and defines were added with '_ub_' indication, as there
were equivalent objects for the legacy model.

Now when the legacy model is not used anymore, remove the '_ub_'
indication.
Signed-off-by: Amit Cohen <amcohen@nvidia.com>
Reviewed-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

The flood_index() function is not needed anymore, as in the unified
bridge model the flood index is calculated using 'mid_base' and
'fid_offset'.

Remove this function.
Signed-off-by: Amit Cohen <amcohen@nvidia.com>
Reviewed-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

After all the preparations for unified bridge model, finally flip mlxsw
driver to use the new model.

Change config profile, set 'ubridge' to true and remove the configurations
that are relevant only for the legacy model. Set 'flood_mode' to
'controlled' as the current mode is not supported with unified bridge
model.

Remove all the code which is dedicated to the legacy model. Remove
'struct mlxsw_sp.ubridge' variable which was temporarily added to separate
configurations between the models.
Signed-off-by: Amit Cohen <amcohen@nvidia.com>
Reviewed-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

The unified bridge model is enabled via the CONFIG_PROFILE command
during driver initialization. Add the definition of the relevant fields
to the command's payload in preparation for unified bridge enablement.
Signed-off-by: Amit Cohen <amcohen@nvidia.com>
Reviewed-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Using the legacy bridge model, there is no VID classification at egress
for 802.1Q FIDs, which means that the VID is maintained.

This behavior cause the limitation that 802.1Q FIDs cannot work with VXLAN.
This limitation stems from the fact that a decapsulated VXLAN packet should
not contain a VLAN tag. If such a packet was to egress from a local port
using a 802.1Q FID, it would "maintain" its VLAN on egress, which is no
VLAN at all.

Currently 802.1Q FIDs are emulated in mlxsw driver using 802.1D FIDs. Using
unified bridge model, there is a FID->VID mapping, so it is possible to
stop emulating 802.1Q FIDs.

The main changes are:
1. Use 'SFGC.bridge_type' = 0, to separate between 802.1Q FIDs and
   802.1D FIDs.
2. Use VLAN RIF instead of the emulated one (VLAN_EMU which is emulated
   using FID RIF).
3. Create VID->FID mapping when the FID is created. Then when a new port
   is mapped to the FID, if it not in virtual mode, no new mapping is
   needed. Save the new port in 'port_vid_list', to be able to update a
   RIF in all {Port, VID}->FID mappings in case that the port will be in
   virtual mode later.
4. Add a dedicated operation function per FID family to update RIF for
   VID->FID mappings. For 802.1d and rFID families, just return. For
   802.1q family, handle the global mapping which is created for new 802.1q
   FID.
Signed-off-by: Amit Cohen <amcohen@nvidia.com>
Reviewed-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

In the unified bridge model, mlxsw will no longer emulate 802.1Q FIDs
using 802.1D FIDs. The new FID table will look as follows:

     +---------------+
     | 802.1q FIDs   | 4K entries
     | [1..4094]     |
     +---------------+
     | 802.1d FIDs   | 1K entries
     | [4095..5118]  |
     +---------------+
     | Dummy FIDs    | 1 entry
     | [5119..5119]  |
     +---------------+
     | rFIDs         | 11K entries
     | [5120..16383] |
     +---------------+

In order to make the change easier to review, four new temporary FID
families will be added (e.g., MLXSW_SP_FID_TYPE_8021D_UB) and will not
be registered with the FID core until mlxsw is flipped to use the unified
bridge model.

Add .1d, rfid and dummy FID families for unified bridge, the next patch
will add .1q family separately as it requires more changes.

The following changes are required:
1. Add 'smpe_index_valid' field to 'struct mlxsw_sp_fid_family' and set
   SFMR.smpe accordingly. SMPE index is reserved for rFIDs, as their
   flooding is handled by firmware, and always reserved in Spectrum-1,
   as it is configured as part of PGT table.

2. Add 'ubridge' field to 'struct mlxsw_sp_fid_family'. This field will
   be removed later, use it in mlxsw_sp_fid_family_{register,unregister}()
   to skip the registration / unregistration of the new families when the
   legacy model is used.

3. Indexes - the start and end indexes of each FID family will need to be
   changed according to the above diagram.

4. Add flood tables for unified bridge model, use 'fid_offset' as table
   type, as in the new model the access to flood tables will be using
   'fid_offset' calculation.

5. FID family operation changes:
   a. rFID supposed to be created using SFMR, as it is not created by
      firmware using unified bridge model.
   b. port_vid_map() should perform SVFA for rFID, as the mapping is not
      created by firmware using unified bridge model.
   c. flood_index() is not aligned to the new model, as this function will
      be removed later.
Signed-off-by: Amit Cohen <amcohen@nvidia.com>
Reviewed-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Router interfaces (RIFs) constructed on top of VLAN-aware bridges are of
'VLAN' type, whereas RIFs constructed on top of VLAN-unaware bridges are of
'FID' type.

Currently 802.1Q FIDs are emulated using 802.1D FIDs, therefore VLAN RIFs
are emulated using FID RIFs. As part of converting the driver to use
unified bridge model, 802.1Q FIDs and VLAN RIFs will be used.

The egress FID is required for VLAN RIFs in Spectrum-2 and above, but not
in Spectrum-1, as in Spectrum-1 the mapping for VLAN RIFs is VID->FID,
while in other ASICs it is FID->FID. The reason for the change is that it
is more scalable to reuse the FID->FID entry than creating multiple
{Port, VID}->FID entries for the router port. Use the existing operation
structure to separate the configuration between different ASICs.

Add support for VLAN RIFs, most of the configurations are same to FID
RIFs.
Signed-off-by: Amit Cohen <amcohen@nvidia.com>
Reviewed-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

After routing, a packet needs to perform an L2 lookup using the DMAC it got
from the routing and a FID. In unified bridge model, the egress FID
configuration needs to be performed by software.

It is configured by RITR for both sub-port RIFs and FID RIFs. Currently
FID RIFs already configure eFID. Add eFID configuration for sub-port RIFs.
Signed-off-by: Amit Cohen <amcohen@nvidia.com>
Reviewed-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

The field 'vid' in RITR is reserved when unified bridge model is used
and the RIF's type is sub-port RIF. Instead, ingress VID is configured via
SVFA and egress VID is configured via REIV.

Set 'vid' to zero in RITR register for sub-port RIF when unified bridge
model is used.
Signed-off-by: Amit Cohen <amcohen@nvidia.com>
Reviewed-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

After routing, the device always consults a table that determines the
packet's egress VID based on {egress RIF, egress local port}. In the
unified bridge model, it is up to software to maintain this table via REIV
register.

The table needs to be updated in the following flows:
1. When a RIF is set on a FID, need to iterate over the FID's {Port, VID}
   list and issue REIV write to map the {RIF, Port} to the given VID.
2. When a {Port, VID} is mapped to a FID and the FID already has a RIF,
   need to issue REIV write with a single record to map the {RIF, Port}
   to the given VID.

REIV register supports a simultaneous update of 256 ports, so use this
capability for the first flow.

Handle the two above mentioned flows.

Add mlxsw_sp_fid_evid_map() function to handle egress VID classification
for both unicast and multicast. Layer 2 multicast configuration is already
done in the driver, just move it to the new function.
Signed-off-by: Amit Cohen <amcohen@nvidia.com>
Reviewed-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Before layer 2 forwarding, the device classifies an incoming packet to
a FID. The classification is done based on one of the following keys:

1. FID
2. VNI (after decapsulation)
3. VID / {Port, VID}

After classification, the FID is known, but also all the attributes of
the FID, such as the router interface (RIF) via which a packet that
needs to be routed will ingress the router block.

In the legacy model, when a RIF was created / destroyed, it was
firmware's responsibility to update it in the previously mentioned FID
classification records. In the unified bridge model, this responsibility
moved to software.

The third classification requires to iterate over the FID's {Port, VID}
list and issue SVFA write with the correct mapping table according to the
port's mode (virtual or not). We never map multiple VLANs to the same FID
using VID->FID mapping, so such a mapping needs to be performed once.

When a new FID classification entry is configured and the FID already has
a RIF, set the RIF as part of SVFA configuration.

The reverse needs to be done when clearing a RIF from a FID. Currently,
clearing is done by issuing mlxsw_sp_fid_rif_set() with a NULL RIF pointer.
Instead, introduce mlxsw_sp_fid_rif_unset().

Note that mlxsw_sp_fid_rif_set() is called after the RIF is fully
operational, so it conforms to the internal requirement regarding
SVFA.irif_v: "Must not be set for a non-enabled RIF".

Do not set the ingress RIF for rFIDs, as the {Port, VID}->rFID entry is
configured by firmware when legacy model is used, a next patch will
handle this configuration for rFIDs and unified bridge model.
Signed-off-by: Amit Cohen <amcohen@nvidia.com>
Reviewed-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

In the new model, SFMR no longer configures both VNI->FID and FID->VNI
classifications, but only the later. The former needs to be configured via
SVFA.

Add SVFA configuration as part of vni_set() and vni_clear().
Signed-off-by: Amit Cohen <amcohen@nvidia.com>
Reviewed-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Using unified bridge model, firmware no longer configures the egress VID
"under the hood" and moves this responsibility to software.

For layer 2, this means that software needs to determine the egress VID
for both unicast (i.e., FDB) and multicast (i.e., MDB and flooding) flows.

Unicast FDB records and unicast LAG FDB records have new fields - "set_vid"
and "vid", set them. For records which point to router port, do not set
these fields.
Signed-off-by: Amit Cohen <amcohen@nvidia.com>
Reviewed-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

hasdata does not need to be initialized to zero. It will be assigned a
value in the following judgment conditions.
Signed-off-by: Li kunyu <kunyu@nfschina.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Merge tag 'linux-can-next-for-5.20-20220703' of git://git.kernel.org/pub/scm/linux/kernel/git/mkl/linux-can-next

Marc Kleine-Budde says:

====================
pull-request: can-next 2022-07-03

this is a pull request of 15 patches for net-next/master.

The first 2 patches are by Max Staudt and add the can327 serial CAN
driver along with a new line discipline ID.

The next patch is by me an fixes a typo in the ctucanfd driver.

The last 12 patches are by Dario Binacchi and integrate slcan CAN
serial driver better into the existing CAN driver API.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>