Implement eswitch API that allows updating rate groups. If group
pointer is NULL, then move the vport to internal unlimited group zero.

Implement devlink_ops->rate_parent_node_set() callback in the terms of
the new eswitch group update API.

Enable QoS for all group's elements if a group has allocated BW share.
Co-developed-by: Vlad Buslov <vladbu@nvidia.com>
Signed-off-by: Vlad Buslov <vladbu@nvidia.com>
Signed-off-by: Dmytro Linkin <dlinkin@nvidia.com>
Reviewed-by: Huy Nguyen <huyn@nvidia.com>
Reviewed-by: Mark Bloch <mbloch@nvidia.com>
Reviewed-by: Parav Pandit <parav@nvidia.com>
Reviewed-by: Saeed Mahameed <saeedm@nvidia.com>

Provide eswitch API to allow controlling group rate limits. Use it to
implement devlink_ops->mlx5_devlink_rate_node_tx_{share|max}_set().

The share rate will create relative bandwidth share on the groups level
while within the group the user can set shared rate on the member vports
of that group and this rate will be relative to the group's share rate.
The group with the highest shared rate will get a BW share of 100 and
the rest of the groups will get a value that reflects the ratio between
their share rate and the maximum share rate.

Example:
Created four rate groups with tx_share limits:

$ devlink port function rate add \
    pci/0000:06:00.0/group_1 tx_share 30gbit
$ devlink port function rate add \
    pci/0000:06:00.0/group_2 tx_share 20gbit
$ devlink port function rate add \
    pci/0000:06:00.0/group_3 tx_share 20gbit
$ devlink port function rate add \
    pci/0000:06:00.0/group_4 tx_share 10gbit

Assuming link speed is 50 Gbit/sec ratio divider will be
50 / (30+20+20+10) = 0.625. Normalized rate values for the groups:

<group_1> 30 * 0.625 = 18.75 Gbit/sec
<group_2> 20 * 0.625 = 12.5 Gbit/sec
<group_3> 20 * 0.625 = 12.5 Gbit/sec
<group_4> 10 * 0.625 = 6.25 Gbit/sec

Rate group with unlimited tx_share rate will receive minimum BW value
(1Mbit/sec) if presented any group with tx_share rate limit. This allow
to not drop all packets in case of heavy traffic.
Co-developed-by: Vlad Buslov <vladbu@nvidia.com>
Signed-off-by: Vlad Buslov <vladbu@nvidia.com>
Signed-off-by: Dmytro Linkin <dlinkin@nvidia.com>
Reviewed-by: Huy Nguyen <huyn@nvidia.com>
Reviewed-by: Mark Bloch <mbloch@nvidia.com>
Reviewed-by: Parav Pandit <parav@nvidia.com>
Reviewed-by: Saeed Mahameed <saeedm@nvidia.com>

Extend eswitch API with rate limiting groups:

- Define new struct mlx5_esw_rate_group that is used to hold all
  internal group data.

- Implement functions that allow creation, destruction and cleanup of
  groups.

- Assign all vports to internal unlimited zero group by default.

This commit lays the groundwork for group rate limiting by implementing
devlink_ops->rate_node_{new|del}() callbacks to support creating and
deleting groups through devlink rate node objects. APIs that allows
setting rates and adding/removing members are implemented in following
patches.
Co-developed-by: Vlad Buslov <vladbu@nvidia.com>
Signed-off-by: Vlad Buslov <vladbu@nvidia.com>
Signed-off-by: Dmytro Linkin <dlinkin@nvidia.com>
Reviewed-by: Huy Nguyen <huyn@nvidia.com>
Reviewed-by: Mark Bloch <mbloch@nvidia.com>
Reviewed-by: Parav Pandit <parav@nvidia.com>
Reviewed-by: Saeed Mahameed <saeedm@nvidia.com>

Register devlink rate leaf object for every eswitch vport.
Implement devlink ops that enable setting shared and max tx rates
through devlink API.
Extract common eswitch code from existing tx rate set function that is
accessed through NDO to be reused for the devlink. Values configured
with NDO API are not visible for the devlink API, therefore shouldn't be
used simultaneously.

When normalizing the BW share value, dividing the desired minimum rate
by the common divider results in losing information since the quotient
is rounded down. This has a significant affect on configurations of low
rate where the round down eliminates a large percentage of the total
rate. To improve the formula, round up the division result to make sure
that the BW share is at least the value it was supposed to be and won't
lost a significant amount of the expected value.
Co-developed-by: Vlad Buslov <vladbu@nvidia.com>
Signed-off-by: Vlad Buslov <vladbu@nvidia.com>
Signed-off-by: Dmytro Linkin <dlinkin@nvidia.com>
Reviewed-by: Huy Nguyen <huyn@nvidia.com>
Reviewed-by: Mark Bloch <mbloch@nvidia.com>
Reviewed-by: Parav Pandit <parav@nvidia.com>
Reviewed-by: Saeed Mahameed <saeedm@nvidia.com>

Move eswitch QoS related code into dedicated file. Provide eswitch API
to access this code meaning it is isolated and restricted to be used
only by eswitch.c. Exception is legacy NDO vf set rate, which moved to
esw/legacy.c.
Signed-off-by: Dmytro Linkin <dlinkin@nvidia.com>
Reviewed-by: Huy Nguyen <huyn@nvidia.com>
Reviewed-by: Mark Bloch <mbloch@nvidia.com>
Reviewed-by: Parav Pandit <parav@nvidia.com>
Reviewed-by: Saeed Mahameed <saeedm@nvidia.com>

Currently the sample offload actions send the encapsulated packet
to software. This commit decapsulates the packet before performing
the sampling and set the tunnel properties on the skb metadata
fields to make the behavior consistent with OVS sFlow.

If decapsulating first, we can't use the same match like before in
default table. So instantiate a post action instance to continue
processing the action list. If HW can preserve reg_c, also use the
post action instance.
Signed-off-by: Chris Mi <cmi@nvidia.com>
Reviewed-by: Oz Shlomo <ozsh@nvidia.com>
Reviewed-by: Roi Dayan <roid@nvidia.com>
Reviewed-by: Mark Bloch <mbloch@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

Currently the sample offload actions send the encapsulated packet
to software. sFlow expects tunneled packets to be decapsulated while
having the tunnel properties on the skb metadata fields.

Reuse the functions used by connection tracking to map the outer
header properties to a unique id. The next patch  will use that id
to restore the tunnel information of decapsulated packets onto the
skb.
Signed-off-by: Chris Mi <cmi@nvidia.com>
Reviewed-by: Oz Shlomo <ozsh@nvidia.com>
Reviewed-by: Roi Dayan <roid@nvidia.com>
Reviewed-by: Mark Bloch <mbloch@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

CONFIG_NET_TC_SKB_EXT controls the SKB extension support for
restoring chain ids. SKB extension is not required for tunnel
restoration.

Remove the CONFIG_NET_TC_SKB_EXT dependency as a pre-step for
using the tunnel restore methods for sample offload use cases.
Signed-off-by: Chris Mi <cmi@nvidia.com>
Reviewed-by: Oz Shlomo <ozsh@nvidia.com>
Reviewed-by: Roi Dayan <roid@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

Move post action table management to common library providing
add/del/get API. Refactor the ct action offload to use the common
API.
Signed-off-by: Chris Mi <cmi@nvidia.com>
Reviewed-by: Oz Shlomo <ozsh@nvidia.com>
Reviewed-by: Roi Dayan <roid@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

Some tc actions are modeled in hardware using multiple tables
causing a tc action list split. For example, CT action is modeled
by jumping to a ct table which is controlled by nf flowtable.
sFlow jumps in hardware to a sample table, which continues to a
"default table" where it should continue processing the action list.

Multi table actions are modeled in hardware using a unique fte_id.
The fte_id is set before jumping to a table. Split actions continue
to a post-action table where the matched fte_id value continues the
execution the tc action list.

Currently the post-action design is implemented only by the ct
action. Introduce post action infrastructure as a pre-step for
reusing it with the sFlow offload feature. Init and destroy the
common post action table. Refactor the ct offload to use the
common post table infrastructure in the next patch.
Signed-off-by: Chris Mi <cmi@nvidia.com>
Reviewed-by: Oz Shlomo <ozsh@nvidia.com>
Reviewed-by: Roi Dayan <roid@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

IDR is deprecated. Use xarray instead.
Signed-off-by: Chris Mi <cmi@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 it is in eswitch attribute. Move it to flow attribute to
reflect the change in previous patch.
Signed-off-by: Chris Mi <cmi@nvidia.com>
Reviewed-by: Roi Dayan <roid@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

Module sample belongs to en/tc instead of esw. Move it and rename
accordingly.
Signed-off-by: Chris Mi <cmi@nvidia.com>
Reviewed-by: Roi Dayan <roid@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

mlx5/esw/sample.c doesn't really need mlx5e_priv object, we can remove
this redundant dependency by passing the eswitch object directly to
the sample object constructor.
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
Reviewed-by: Roi Dayan <roid@nvidia.com>

drivers/ptp/Kconfig:
  55c8fca1 ("ptp_pch: Restore dependency on PCI")
  e5f31552 ("ethernet: fix PTP_1588_CLOCK dependencies")
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Pull networking fixes from Jakub Kicinski:
 "Networking fixes, including fixes from bpf, wireless and mac80211
  trees.

  Current release - regressions:

   - tipc: call tipc_wait_for_connect only when dlen is not 0

   - mac80211: fix locking in ieee80211_restart_work()

  Current release - new code bugs:

   - bpf: add rcu_read_lock in bpf_get_current_[ancestor_]cgroup_id()

   - ethernet: ice: fix perout start time rounding

   - wwan: iosm: prevent underflow in ipc_chnl_cfg_get()

  Previous releases - regressions:

   - bpf: clear zext_dst of dead insns

   - sch_cake: fix srchost/dsthost hashing mode

   - vrf: reset skb conntrack connection on VRF rcv

   - net/rds: dma_map_sg is entitled to merge entries

  Previous releases - always broken:

   - ethernet: bnxt: fix Tx path locking and races, add Rx path
     barriers"

* tag 'net-5.14-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (42 commits)
  net: dpaa2-switch: disable the control interface on error path
  Revert "flow_offload: action should not be NULL when it is referenced"
  iavf: Fix ping is lost after untrusted VF had tried to change MAC
  i40e: Fix ATR queue selection
  r8152: fix the maximum number of PLA bp for RTL8153C
  r8152: fix writing USB_BP2_EN
  mptcp: full fully established support after ADD_ADDR
  mptcp: fix memory leak on address flush
  net/rds: dma_map_sg is entitled to merge entries
  net: mscc: ocelot: allow forwarding from bridge ports to the tag_8021q CPU port
  net: asix: fix uninit value bugs
  ovs: clear skb->tstamp in forwarding path
  net: mdio-mux: Handle -EPROBE_DEFER correctly
  net: mdio-mux: Don't ignore memory allocation errors
  net: mdio-mux: Delete unnecessary devm_kfree
  net: dsa: sja1105: fix use-after-free after calling of_find_compatible_node, or worse
  sch_cake: fix srchost/dsthost hashing mode
  ixgbe, xsk: clean up the resources in ixgbe_xsk_pool_enable error path
  net: qlcnic: add missed unlock in qlcnic_83xx_flash_read32
  mac80211: fix locking in ieee80211_restart_work()
  ...

Merge tag 'platform-drivers-x86-v5.14-4' of git://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86

Pull x86 platform driver fixes from Hans de Goede:

 - Enable SW_TABLET_MODE support for the TP200s

 - Enable WMI on two more Gigabyte motherboards

* tag 'platform-drivers-x86-v5.14-4' of git://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86:
  platform/x86: gigabyte-wmi: add support for B450M S2H V2
  platform/x86: gigabyte-wmi: add support for X570 GAMING X
  platform/x86: asus-nb-wmi: Add tablet_mode_sw=lid-flip quirk for the TP200s
  platform/x86: asus-nb-wmi: Allow configuring SW_TABLET_MODE method with a module option

A recent change added error checking messages and failed to remove one
of the previous error checks. There are now two checks on variable err
so the second one is redundant dead code and can be removed.

Addresses-Coverity: ("Logically dead code")
Fixes: a83bdada ("octeontx2-af: Add debug messages for failures")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Link: https://lore.kernel.org/r/20210818130927.33895-1-colin.king@canonical.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

Merge tag 'linux-can-next-for-5.15-20210819' of git://git.kernel.org/pub/scm/linux/kernel/git/mkl/linux-can-next

Marc Kleine-Budde says:

====================
linux-can-next-for-5.15-20210819

The first patch is by me, for the mailmap file and maps the email
address of two former ESD employees to a newly created role account.

The next 3 patches are by Oleksij Rempel and add support for GPIO
based switchable CAN bus termination.

The next 3 patches are by Vincent Mailhol. The first one changes the
CAN netlink interface to not bail out if the user switched off
unsupported features. The next one adds Vincent as the maintainer of
the etas_es58x driver and the last one cleans up the documentation of
struct es58x_fd_tx_conf_msg.

The next patch is by me, for the mcp251xfd driver and marks some
instances of struct mcp251xfd_priv as const. Lad Prabhakar contributes
2 patches for the rcar_canfd driver, that add support for RZ/G2L
family.

The next 5 patches target the m_can/tcan45x5 driver. 2 are by me an
fix trivial checkpatch warnings. The remaining 3 patches are by Matt
Kline and improve the performance on the SPI based tcan4x5x chip by
batching FIFO reads and writes.

The last 7 patches are for the c_can driver. Dario Binacchi's patch
converts the DT bindings to yaml, 2 patches by me fix a typo and
rename a macro to properly represent the usage. The last 4 patches are
again by Dario Binacchi and provide a performance improvement for the
TX path by operating the TX mailboxes as a true FIFO.

* tag 'linux-can-next-for-5.15-20210819' of git://git.kernel.org/pub/scm/linux/kernel/git/mkl/linux-can-next: (22 commits)
  can: c_can: cache frames to operate as a true FIFO
  can: c_can: support tx ring algorithm
  can: c_can: exit c_can_do_tx() early if no frames have been sent
  can: c_can: remove struct c_can_priv::priv field
  can: c_can: rename IF_RX -> IF_NAPI
  can: c_can: c_can_do_tx(): fix typo in comment
  dt-bindings: net: can: c_can: convert to json-schema
  can: m_can: Batch FIFO writes during CAN transmit
  can: m_can: Batch FIFO reads during CAN receive
  can: m_can: Disable IRQs on FIFO bus errors
  can: m_can: fix block comment style
  can: tcan4x5x: cdev_to_priv(): remove stray empty line
  can: rcar_canfd: Add support for RZ/G2L family
  dt-bindings: net: can: renesas,rcar-canfd: Document RZ/G2L SoC
  can: mcp251xfd: mark some instances of struct mcp251xfd_priv as const
  can: etas_es58x: clean-up documentation of struct es58x_fd_tx_conf_msg
  MAINTAINERS: add Vincent MAILHOL as maintainer for the ETAS ES58X CAN/USB driver
  can: netlink: allow user to turn off unsupported features
  can: dev: provide optional GPIO based termination support
  dt-bindings: can: fsl,flexcan: enable termination-* bindings
  ...
====================

Link: https://lore.kernel.org/r/20210819133913.657715-1-mkl@pengutronix.deSigned-off-by: Jakub Kicinski <kuba@kernel.org>

Currently dpaa2_switch_takedown has a funny name and does not do the
opposite of dpaa2_switch_init, which makes probing fail when we need to
handle an -EPROBE_DEFER.

A sketch of what dpaa2_switch_init does:

	dpsw_open

	dpaa2_switch_detect_features

	dpsw_reset

	for (i = 0; i < ethsw->sw_attr.num_ifs; i++) {
		dpsw_if_disable

		dpsw_if_set_stp

		dpsw_vlan_remove_if_untagged

		dpsw_if_set_tci

		dpsw_vlan_remove_if
	}

	dpsw_vlan_remove

	alloc_ordered_workqueue

	dpsw_fdb_remove

	dpaa2_switch_ctrl_if_setup

When dpaa2_switch_takedown is called from the error path of
dpaa2_switch_probe(), the control interface, enabled by
dpaa2_switch_ctrl_if_setup from dpaa2_switch_init, remains enabled,
because dpaa2_switch_takedown does not call
dpaa2_switch_ctrl_if_teardown.

Since dpaa2_switch_probe might fail due to EPROBE_DEFER of a PHY, this
means that a second probe of the driver will happen with the control
interface directly enabled.

This will trigger a second error:

[   93.273528] fsl_dpaa2_switch dpsw.0: dpsw_ctrl_if_set_pools() failed
[   93.281966] fsl_dpaa2_switch dpsw.0: fsl_mc_driver_probe failed: -13
[   93.288323] fsl_dpaa2_switch: probe of dpsw.0 failed with error -13

Which if we investigate the /dev/dpaa2_mc_console log, we find out is
caused by:

[E, ctrl_if_set_pools:2211, DPMNG]  ctrl_if must be disabled

So make dpaa2_switch_takedown do the opposite of dpaa2_switch_init (in
reasonable limits, no reason to change STP state, re-add VLANs etc), and
rename it to something more conventional, like dpaa2_switch_teardown.

Fixes: 613c0a58 ("staging: dpaa2-switch: enable the control interface")
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Ioana Ciornei <ioana.ciornei@nxp.com>
Link: https://lore.kernel.org/r/20210819141755.1931423-1-vladimir.oltean@nxp.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

This reverts commit 9ea3e52c.

Cited commit added a check to make sure 'action' is not NULL, but
'action' is already dereferenced before the check, when calling
flow_offload_has_one_action().

Therefore, the check does not make any sense and results in a smatch
warning:

include/net/flow_offload.h:322 flow_action_mixed_hw_stats_check() warn:
variable dereferenced before check 'action' (see line 319)

Fix by reverting this commit.

Cc: gushengxian <gushengxian@yulong.com>
Fixes: 9ea3e52c ("flow_offload: action should not be NULL when it is referenced")
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Link: https://lore.kernel.org/r/20210819105842.1315705-1-idosch@idosch.orgSigned-off-by: Jakub Kicinski <kuba@kernel.org>

Tony Nguyen says:

====================
Intel Wired LAN Driver Updates 2021-08-18

This series contains updates to i40e and iavf drivers.

Arkadiusz fixes Flow Director not using the correct queue due to calling
the wrong pick Tx function for i40e.

Sylwester resolves traffic loss for iavf when it attempts to change its
MAC address when it does not have permissions to do so.
====================

Link: https://lore.kernel.org/r/20210818174217.4138922-1-anthony.l.nguyen@intel.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

Make changes to MAC address dependent on the response of PF.
Disallow changes to HW MAC address and MAC filter from untrusted
VF, thanks to that ping is not lost if VF tries to change MAC.
Add a new field in iavf_mac_filter, to indicate whether there
was response from PF for given filter. Based on this field pass
or discard the filter.
If untrusted VF tried to change it's address, it's not changed.
Still filter was changed, because of that ping couldn't go through.

Fixes: c5c922b3 ("iavf: fix MAC address setting for VFs when filter is rejected")
Signed-off-by: Przemyslaw Patynowski <przemyslawx.patynowski@intel.com>
Signed-off-by: Sylwester Dziedziuch <sylwesterx.dziedziuch@intel.com>
Signed-off-by: Mateusz Palczewski <mateusz.palczewski@intel.com>
Tested-by: Gurucharan G <Gurucharanx.g@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Without this patch, ATR does not work. Receive/transmit uses queue
selection based on SW DCB hashing method.

If traffic classes are not configured for PF, then use
netdev_pick_tx function for selecting queue for packet transmission.
Instead of calling i40e_swdcb_skb_tx_hash, call netdev_pick_tx,
which ensures that packet is transmitted/received from CPU that is
running the application.

Reproduction steps:
1. Load i40e driver
2. Map each MSI interrupt of i40e port for each CPU
3. Disable ntuple, enable ATR i.e.:
ethtool -K $interface ntuple off
ethtool --set-priv-flags $interface flow-director-atr
4. Run application that is generating traffic and is bound to a
single CPU, i.e.:
taskset -c 9 netperf -H 1.1.1.1 -t TCP_RR -l 10
5. Observe behavior:
Application's traffic should be restricted to the CPU provided in
taskset.

Fixes: 89ec1f08 ("i40e: Fix queue-to-TC mapping on Tx")
Signed-off-by: Przemyslaw Patynowski <przemyslawx.patynowski@intel.com>
Signed-off-by: Arkadiusz Kubalewski <arkadiusz.kubalewski@intel.com>
Tested-by: Dave Switzer <david.switzer@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Daniel Borkmann says:

====================
pull-request: bpf 2021-08-19

We've added 3 non-merge commits during the last 3 day(s) which contain
a total of 3 files changed, 29 insertions(+), 6 deletions(-).

The main changes are:

1) Fix to clear zext_dst for dead instructions which was causing invalid program
   rejections on JITs with bpf_jit_needs_zext such as s390x, from Ilya Leoshkevich.

2) Fix RCU splat in bpf_get_current_{ancestor_,}cgroup_id() helpers when they are
   invoked from sleepable programs, from Yonghong Song.

* https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf:
  selftests, bpf: Test that dead ldx_w insns are accepted
  bpf: Clear zext_dst of dead insns
  bpf: Add rcu_read_lock in bpf_get_current_[ancestor_]cgroup_id() helpers
====================

Link: https://lore.kernel.org/r/20210819144904.20069-1-daniel@iogearbox.netSigned-off-by: Jakub Kicinski <kuba@kernel.org>

As reported by a comment in the c_can_start_xmit() this was not a FIFO.
C/D_CAN controller sends out the buffers prioritized so that the lowest
buffer number wins.

What did c_can_start_xmit() do if head was less tail in the tx ring ? It
waited until all the frames queued in the FIFO was actually transmitted
by the controller before accepting a new CAN frame to transmit, even if
the FIFO was not full, to ensure that the messages were transmitted in
the order in which they were loaded.

By storing the frames in the FIFO without requiring its transmission, we
will be able to use the full size of the FIFO even in cases such as the
one described above. The transmission interrupt will trigger their
transmission only when all the messages previously loaded but stored in
less priority positions of the buffers have been transmitted.

Link: https://lore.kernel.org/r/20210807130800.5246-5-dariobin@libero.itSuggested-by: Gianluca Falavigna <gianluca.falavigna@inwind.it>
Signed-off-by: Dario Binacchi <dariobin@libero.it>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

The algorithm is already used successfully by other CAN drivers
(e.g. mcp251xfd). Its implementation was kindly suggested to me by
Marc Kleine-Budde following a patch I had previously submitted. You can
find every detail at https://lore.kernel.org/patchwork/patch/1422929/.

The idea is that after this patch, it will be easier to patch the driver
to use the message object memory as a true FIFO.

Link: https://lore.kernel.org/r/20210807130800.5246-4-dariobin@libero.itSuggested-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Dario Binacchi <dariobin@libero.it>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

The c_can_poll() handles RX/TX events unconditionally. It may therefore
happen that c_can_do_tx() is called unnecessarily because the interrupt
was triggered by the reception of a frame. In these cases, we avoid to
execute unnecessary statements and exit immediately.

Link: https://lore.kernel.org/r/20210807130800.5246-3-dariobin@libero.itSigned-off-by: Dario Binacchi <dariobin@libero.it>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

It references the clock but it is never used. So let's remove it.

Link: https://lore.kernel.org/r/20210807130800.5246-2-dariobin@libero.itSigned-off-by: Dario Binacchi <dariobin@libero.it>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

The C_CAN/D_CAN cores implement 2 interfaces to manage the message
objects. To avoid concurrency and the need for locking one interface
is used in the TX path (IF_TX). While the other one, named IF_RX is
used from NAPI context only. As this interface is not only used to
manage RX, but also TX message objects, this patch renames IF_RX to
IF_NAPI.

Link: https://lore.kernel.org/r/20210809080608.171545-1-mkl@pengutronix.de
Cc: Dario Binacchi <dariobin@libero.it>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

This patch fixes a typo in the comment in c_can_do_tx().

Fixes: eddf6711 ("can: c_can: add a comment about IF_RX interface's use")
Link: https://lore.kernel.org/r/20210806105127.103302-1-mkl@pengutronix.de
Cc: Dario Binacchi <dariobin@libero.it>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

Convert the Bosch C_CAN/D_CAN controller device tree binding
documentation to json-schema.

Document missing properties.
Remove "ti,hwmods" as it is no longer used in TI dts.
Make "clocks" required as it is used in all dts.
Update the examples.

Link: https://lore.kernel.org/r/20210805192750.9051-1-dariobin@libero.itSigned-off-by: Dario Binacchi <dariobin@libero.it>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

Give FIFO writes the same treatment as reads to avoid fixed costs of
individual transfers on a slow bus (e.g., tcan4x5x).

Link: https://lore.kernel.org/r/20210817050853.14875-4-matt@bitbashing.ioSigned-off-by: Matt Kline <matt@bitbashing.io>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

On peripherals communicating over a relatively slow SPI line
(e.g. tcan4x5x), individual transfers have high fixed costs.
This causes the driver to spend most of its time waiting between
transfers and severely limits throughput.

Reduce these overheads by reading more than one word at a time.
Writing could get a similar treatment in follow-on commits.

Link: https://lore.kernel.org/r/20210817050853.14875-3-matt@bitbashing.ioSigned-off-by: Matt Kline <matt@bitbashing.io>
[mkl: remove __packed from struct id_and_dlc]
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

If FIFO reads or writes fail due to the underlying regmap (e.g., SPI)
I/O, propagate that up to the m_can driver, log an error, and disable
interrupts, similar to the mcp251xfd driver.

While reworking the FIFO functions to add this error handling,
add support for bulk reads and writes of multiple registers.

Link: https://lore.kernel.org/r/20210817050853.14875-2-matt@bitbashing.ioSigned-off-by: Matt Kline <matt@bitbashing.io>
[mkl: re-wrap long lines, remove WARN_ON, convert to netdev block comments]
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

This patch fixes the commenting style in the m_can driver.

Fixes: 1be37d3b ("can: m_can: fix periph RX path: use rx-offload to ensure skbs are sent from softirq context")
Fixes: df06fd67 ("can: m_can: m_can_chip_config(): enable and configure internal timestamps")
Link: https://lore.kernel.org/r/20210819111703.599686-2-mkl@pengutronix.de
Cc: Chandrasekar Ramakrishnan <rcsekar@samsung.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

This patch removes a stray empty line in the cdev_to_priv() function.

Fixes: ac33ffd3 ("can: m_can: let m_can_class_allocate_dev() allocate driver specific private data")
Link: https://lore.kernel.org/r/20210819111703.599686-1-mkl@pengutronix.deSigned-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

CANFD block on RZ/G2L SoC is almost identical to one found on
R-Car Gen3 SoC's. On RZ/G2L SoC interrupt sources for each channel
are split into different sources and the IP doesn't divide (1/2)
CANFD clock within the IP.

This patch adds compatible string for RZ/G2L family and splits
the irq handlers to accommodate both RZ/G2L and R-Car Gen3 SoC's.

Link: https://lore.kernel.org/r/20210727133022.634-3-prabhakar.mahadev-lad.rj@bp.renesas.comSigned-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Biju Das <biju.das.jz@bp.renesas.com>
[mkl: fixed typo: recieve -> receive, thanks Geert]
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

Add CANFD binding documentation for Renesas RZ/G2L SoC.

Link: https://lore.kernel.org/r/20210727133022.634-2-prabhakar.mahadev-lad.rj@bp.renesas.comSigned-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

With the patch 07ff4aed ("time/timecounter: Mark 1st argument of
timecounter_cyc2time() as const") some instances of the struct
mcp251xfd_priv can be marked as const. This patch marks these as
const.

Link: https://lore.kernel.org/r/20210813091027.159379-1-mkl@pengutronix.de
Cc: Manivannan Sadhasivam <mani@kernel.org>
Cc: Thomas Kopp <thomas.kopp@microchip.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>