This patch dealt with removing multi subflows in PM:

In mptcp_pm_remove_subflow, changed the input parameter local_id as an
list of removing address ids, and passed the list to
mptcp_pm_nl_rm_subflow_received.

In mptcp_pm_nl_rm_subflow_received, iterated each address id from the
received ids list. Then shut down and closed each address id's subsocket.

In mptcp_nl_remove_subflow_and_signal_addr, put the single address id into
an ids list, and passed it to mptcp_pm_remove_subflow.
Signed-off-by: Geliang Tang <geliangtang@gmail.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

This patch dropped the member rm_id of struct mptcp_pm_data. Use
rm_list_rx in mptcp_pm_nl_rm_addr_received instead of using rm_id.

In mptcp_pm_nl_rm_addr_received, iterated each address id from
pm.rm_list_rx, then shut down and closed each address id's subsocket.
Signed-off-by: Geliang Tang <geliangtang@gmail.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

This patch added a new member rm_list_rx for struct mptcp_pm_data as an
list of the removing address ids on the incoming direction. Initialized
its nr field to zero in mptcp_pm_data_init.

In mptcp_pm_rm_addr_received, set it as the input rm_list.
Signed-off-by: Geliang Tang <geliangtang@gmail.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

This patch changed the member rm_id in struct mptcp_options_received as a
list of the removing address ids, and renamed it to rm_list.

In mptcp_parse_option, parsed the RM_ADDR suboption and filled them into
the rm_list in struct mptcp_options_received.

In mptcp_incoming_options, passed this rm_list to the function
mptcp_pm_rm_addr_received.

It also changed the parameter type of mptcp_pm_rm_addr_received.
Signed-off-by: Geliang Tang <geliangtang@gmail.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

This patch added a new member rm_list_tx for struct mptcp_pm_data as the
removing address list on the outgoing direction. Initialize its nr field
to zero in mptcp_pm_data_init.

In mptcp_pm_remove_anno_addr, put the single address id into an removing
list, and passed it to mptcp_pm_remove_addr.

In mptcp_pm_remove_addr, save the input rm_list to rm_list_tx in struct
mptcp_pm_data.
Signed-off-by: Geliang Tang <geliangtang@gmail.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

This patch defined a new struct mptcp_rm_list, the ids field was an
array of the removing address ids, the nr field was the valid number of
removing address ids in the array. The array size was definced as a new
macro MPTCP_RM_IDS_MAX. Changed the member rm_id of struct
mptcp_out_options to rm_list.

In mptcp_established_options_rm_addr, invoked mptcp_pm_rm_addr_signal to
get the rm_list. According the number of addresses in it, calculated
the padded RM_ADDR suboption length. And saved the ids array in struct
mptcp_out_options's rm_list member.

In mptcp_write_options, iterated each address id from struct
mptcp_out_options's rm_list member, set the invalid ones as TCPOPT_NOP,
then filled them into the RM_ADDR suboption.

Changed TCPOLEN_MPTCP_RM_ADDR_BASE from 4 to 3.
Signed-off-by: Geliang Tang <geliangtang@gmail.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Petr Machata says:

====================
net: Resilient NH groups: netdevsim, selftests

Support for resilient next-hop groups was added in a previous patch set.
Resilient next hop groups add a layer of indirection between the SKB hash
and the next hop. Thus the hash is used to reference a hash table bucket,
which is then used to reference a particular next hop. This allows the
system more flexibility when assigning SKB hash space to next hops.
Previously, each next hop had to be assigned a continuous range of SKB hash
space. With a hash table as an intermediate layer, it is possible to
reassign next hops with a hash table bucket granularity. In turn, this
mends issues with traffic flow redirection resulting from next hop removal
or adjustments in next-hop weights.

This patch set introduces mock offloading of resilient next hop groups by
the netdevsim driver, and a suite of selftests.

- Patch #1 adds a netdevsim-specific lock to protect next-hop hashtable.
  Previously, netdevsim relied on RTNL to maintain mutual exclusion.
  Patch #2 extracts a helper to make the following patches clearer.

- Patch #3 implements the support for offloading of resilient next-hop
  groups.

- Patch #4 introduces a new debugfs interface to set activity on a selected
  next-hop bucket. This simulates how HW can periodically report bucket
  activity, and buckets thus marked are expected to be exempt from
  migration to new next hops when the group changes.

- Patches #5 and #6 clean up the fib_nexthop selftests.

- Patches #7, #8 and #9 add tests for resilient next hop groups. Patch #7
  adds resilient-hashing counterparts to fib_nexthops.sh. Patch #8 adds a
  new traffic test for resilient next-hop groups. Patch #9 adds a new
  traffic test for tunneling.

- Patch #10 actually leverages the netdevsim offload to implement a suite
  of algorithmic tests that verify how and when buckets are migrated under
  various simulated workload scenarios.

The overall plan is to contribute approximately the following patchsets:

1) Nexthop policy refactoring (already pushed)
2) Preparations for resilient next hop groups (already pushed)
3) Implementation of resilient next hop group (already pushed)
4) Netdevsim offload plus a suite of selftests (this patchset)
5) Preparations for mlxsw offload of resilient next-hop groups
6) mlxsw offload including selftests

Interested parties can look at the complete code at [2].

[1] https://tools.ietf.org/html/rfc2992
[2] https://github.com/idosch/linux/commits/submit/res_integ_v1
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

Test various aspects of the resilient nexthop group offload API on top
of the netdevsim implementation. Both good and bad flows are tested.
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Co-developed-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Add a resilient nexthop objects version of gre_multipath_nh.sh. Test
that both IPv4 and IPv6 overlays work with resilient nexthop groups
where the nexthops are two GRE tunnels.
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Verify that IPv4 and IPv6 multipath forwarding works correctly with
resilient nexthop groups and with different weights.

Test that when the idle timer is not zero, the resilient groups are not
rebalanced - because the nexthop buckets are considered active - and the
initial weights (1:1) are used.
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Add test cases for resilient nexthop groups. Exhaustive forwarding tests
are added separately under net/forwarding/.

Examples:

 # ./fib_nexthops.sh -t basic_res

Basic resilient nexthop group functional tests
----------------------------------------------
TEST: Add a nexthop group with default parameters                   [ OK ]
TEST: Get a nexthop group with default parameters                   [ OK ]
TEST: Get a nexthop group with non-default parameters               [ OK ]
TEST: Add a nexthop group with 0 buckets                            [ OK ]
TEST: Replace nexthop group parameters                              [ OK ]
TEST: Get a nexthop group after replacing parameters                [ OK ]
TEST: Replace idle timer                                            [ OK ]
TEST: Get a nexthop group after replacing idle timer                [ OK ]
TEST: Replace unbalanced timer                                      [ OK ]
TEST: Get a nexthop group after replacing unbalanced timer          [ OK ]
TEST: Replace with no parameters                                    [ OK ]
TEST: Get a nexthop group after replacing no parameters             [ OK ]
TEST: Replace nexthop group type - implicit                         [ OK ]
TEST: Replace nexthop group type - explicit                         [ OK ]
TEST: Replace number of nexthop buckets                             [ OK ]
TEST: Get a nexthop group after replacing with invalid parameters   [ OK ]
TEST: Dump all nexthop buckets                                      [ OK ]
TEST: Dump all nexthop buckets in a group                           [ OK ]
TEST: Dump all nexthop buckets with a specific nexthop device       [ OK ]
TEST: Dump all nexthop buckets with a specific nexthop identifier   [ OK ]
TEST: Dump all nexthop buckets in a non-existent group              [ OK ]
TEST: Dump all nexthop buckets in a non-resilient group             [ OK ]
TEST: Dump all nexthop buckets using a non-existent device          [ OK ]
TEST: Dump all nexthop buckets with invalid 'groups' keyword        [ OK ]
TEST: Dump all nexthop buckets with invalid 'fdb' keyword           [ OK ]
TEST: Get a valid nexthop bucket                                    [ OK ]
TEST: Get a nexthop bucket with valid group, but invalid index      [ OK ]
TEST: Get a nexthop bucket from a non-resilient group               [ OK ]
TEST: Get a nexthop bucket from a non-existent group                [ OK ]

Tests passed:  29
Tests failed:   0

 # ./fib_nexthops.sh -t ipv4_large_res_grp

IPv4 large resilient group (128k buckets)
-----------------------------------------
TEST: Dump large (x131072) nexthop buckets                          [ OK ]

Tests passed:   1
Tests failed:   0

 # ./fib_nexthops.sh -t ipv6_large_res_grp

IPv6 large resilient group (128k buckets)
-----------------------------------------
TEST: Dump large (x131072) nexthop buckets                          [ OK ]

Tests passed:   1
Tests failed:   0

 # ./fib_nexthops.sh -t ipv4_res_torture

IPv4 runtime resilient nexthop group torture
--------------------------------------------
TEST: IPv4 resilient nexthop group torture test                     [ OK ]

Tests passed:   1
Tests failed:   0

 # ./fib_nexthops.sh -t ipv6_res_torture

IPv6 runtime resilient nexthop group torture
--------------------------------------------
TEST: IPv6 resilient nexthop group torture test                     [ OK ]

Tests passed:   1
Tests failed:   0

 # ./fib_nexthops.sh -t ipv4_res_grp_fcnal

IPv4 resilient groups functional
--------------------------------
TEST: Nexthop group updated when entry is deleted                   [ OK ]
TEST: Nexthop buckets updated when entry is deleted                 [ OK ]
TEST: Nexthop group updated after replace                           [ OK ]
TEST: Nexthop buckets updated after replace                         [ OK ]
TEST: Nexthop group updated when entry is deleted - nECMP           [ OK ]
TEST: Nexthop buckets updated when entry is deleted - nECMP         [ OK ]
TEST: Nexthop group updated after replace - nECMP                   [ OK ]
TEST: Nexthop buckets updated after replace - nECMP                 [ OK ]

Tests passed:   8
Tests failed:   0

 # ./fib_nexthops.sh -t ipv6_res_grp_fcnal

IPv6 resilient groups functional
--------------------------------
TEST: Nexthop group updated when entry is deleted                   [ OK ]
TEST: Nexthop buckets updated when entry is deleted                 [ OK ]
TEST: Nexthop group updated after replace                           [ OK ]
TEST: Nexthop buckets updated after replace                         [ OK ]
TEST: Nexthop group updated when entry is deleted - nECMP           [ OK ]
TEST: Nexthop buckets updated when entry is deleted - nECMP         [ OK ]
TEST: Nexthop group updated after replace - nECMP                   [ OK ]
TEST: Nexthop buckets updated after replace - nECMP                 [ OK ]

Tests passed:   8
Tests failed:   0
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Co-developed-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

The lines with the IPv4 and IPv6 test cases are already very long and
more test cases will be added in subsequent patches.

List each test case in a different line to make it easier to extend the
test with more test cases.
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Before:

 # ./fib_nexthops.sh -t ipv4_torture

IPv4 runtime torture
--------------------
TEST: IPv4 torture test                                             [ OK ]
./fib_nexthops.sh: line 213: 19376 Killed                  ipv4_del_add_loop1
./fib_nexthops.sh: line 213: 19377 Killed                  ipv4_grp_replace_loop
./fib_nexthops.sh: line 213: 19378 Killed                  ip netns exec me ping -f 172.16.101.1 > /dev/null 2>&1
./fib_nexthops.sh: line 213: 19380 Killed                  ip netns exec me ping -f 172.16.101.2 > /dev/null 2>&1
./fib_nexthops.sh: line 213: 19381 Killed                  ip netns exec me mausezahn veth1 -B 172.16.101.2 -A 172.16.1.1 -c 0 -t tcp "dp=1-1023, flags=syn" > /dev/null 2>&1

Tests passed:   1
Tests failed:   0

 # ./fib_nexthops.sh -t ipv6_torture

IPv6 runtime torture
--------------------
TEST: IPv6 torture test                                             [ OK ]
./fib_nexthops.sh: line 213: 24453 Killed                  ipv6_del_add_loop1
./fib_nexthops.sh: line 213: 24454 Killed                  ipv6_grp_replace_loop
./fib_nexthops.sh: line 213: 24456 Killed                  ip netns exec me ping -f 2001:db8:101::1 > /dev/null 2>&1
./fib_nexthops.sh: line 213: 24457 Killed                  ip netns exec me ping -f 2001:db8:101::2 > /dev/null 2>&1
./fib_nexthops.sh: line 213: 24458 Killed                  ip netns exec me mausezahn -6 veth1 -B 2001:db8:101::2 -A 2001:db8:91::1 -c 0 -t tcp "dp=1-1023, flags=syn" > /dev/null 2>&1

Tests passed:   1
Tests failed:   0

After:

 # ./fib_nexthops.sh -t ipv4_torture

IPv4 runtime torture
--------------------
TEST: IPv4 torture test                                             [ OK ]

Tests passed:   1
Tests failed:   0

 # ./fib_nexthops.sh -t ipv6_torture

IPv6 runtime torture
--------------------
TEST: IPv6 torture test                                             [ OK ]

Tests passed:   1
Tests failed:   0
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

A key component of the resilient hashing algorithm is the hash buckets'
activity. If a bucket is active, it will not be populated with a new
nexthop in order not to break existing flows. Therefore, in order to
easily and thoroughly test the algorithm, we need to be in full control
over the reported activity.

Add a debugfs interface that allows user space to have netdevsim report
a nexthop bucket within a resilient nexthop group as active. For
example:

 # echo 10 23 > /sys/kernel/debug/netdevsim/netdevsim10/fib/nexthop_bucket_activity

Will mark bucket 23 in nexthop group 10 as active.
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Allow resilient nexthop groups to be programmed and account their
occupancy according to their number of buckets. The nexthop group itself
as well as its buckets are marked with hardware flags (i.e.,
'RTNH_F_TRAP').

Replacement of a single nexthop bucket can fail using the following
debugfs knob:

 # cat /sys/kernel/debug/netdevsim/netdevsim10/fib/fail_nexthop_bucket_replace
 N
 # echo 1 > /sys/kernel/debug/netdevsim/netdevsim10/fib/fail_nexthop_bucket_replace
 # cat /sys/kernel/debug/netdevsim/netdevsim10/fib/fail_nexthop_bucket_replace
 Y

Replacement of a resilient nexthop group can fail using the following
debugfs knob:

 # cat /sys/kernel/debug/netdevsim/netdevsim10/fib/fail_res_nexthop_group_replace
 N
 # echo 1 > /sys/kernel/debug/netdevsim/netdevsim10/fib/fail_res_nexthop_group_replace
 # cat /sys/kernel/debug/netdevsim/netdevsim10/fib/fail_res_nexthop_group_replace
 Y

This enables testing of various error paths.
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Instead of calling nexthop_set_hw_flags(), call a helper. It will be
used to also set nexthop bucket flags in a subsequent patch.
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: Petr Machata <petrm@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Currently netdevsim relies on RTNL to maintain exclusivity in accessing the
nexthop hash table. However, bucket notification may be called without RTNL
having been held. Instead, introduce a custom lock to guard the table.
Signed-off-by: Petr Machata <petrm@nvidia.com>
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Lee Jones says:

====================
Rid W=1 warnings from PTP

This set is part of a larger effort attempting to clean-up W=1
kernel builds, which are currently overwhelmingly riddled with
niggly little warnings.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

Fixes the following W=1 kernel build warning(s):

 drivers/ptp/ptp_pch.c:78: warning: Function parameter or member 'control' not described in 'pch_ts_regs'
 drivers/ptp/ptp_pch.c:78: warning: Function parameter or member 'event' not described in 'pch_ts_regs'
 drivers/ptp/ptp_pch.c:78: warning: Function parameter or member 'addend' not described in 'pch_ts_regs'
 drivers/ptp/ptp_pch.c:78: warning: Function parameter or member 'accum' not described in 'pch_ts_regs'
 drivers/ptp/ptp_pch.c:78: warning: Function parameter or member 'test' not described in 'pch_ts_regs'
 drivers/ptp/ptp_pch.c:78: warning: Function parameter or member 'ts_compare' not described in 'pch_ts_regs'
 drivers/ptp/ptp_pch.c:78: warning: Function parameter or member 'rsystime_lo' not described in 'pch_ts_regs'
 drivers/ptp/ptp_pch.c:78: warning: Function parameter or member 'rsystime_hi' not described in 'pch_ts_regs'
 drivers/ptp/ptp_pch.c:78: warning: Function parameter or member 'systime_lo' not described in 'pch_ts_regs'
 drivers/ptp/ptp_pch.c:78: warning: Function parameter or member 'systime_hi' not described in 'pch_ts_regs'
 drivers/ptp/ptp_pch.c:78: warning: Function parameter or member 'trgt_lo' not described in 'pch_ts_regs'
 drivers/ptp/ptp_pch.c:78: warning: Function parameter or member 'trgt_hi' not described in 'pch_ts_regs'
 drivers/ptp/ptp_pch.c:78: warning: Function parameter or member 'asms_lo' not described in 'pch_ts_regs'
 drivers/ptp/ptp_pch.c:78: warning: Function parameter or member 'asms_hi' not described in 'pch_ts_regs'
 drivers/ptp/ptp_pch.c:78: warning: Function parameter or member 'amms_lo' not described in 'pch_ts_regs'
 drivers/ptp/ptp_pch.c:78: warning: Function parameter or member 'amms_hi' not described in 'pch_ts_regs'
 drivers/ptp/ptp_pch.c:78: warning: Function parameter or member 'ch_control' not described in 'pch_ts_regs'
 drivers/ptp/ptp_pch.c:78: warning: Function parameter or member 'ch_event' not described in 'pch_ts_regs'
 drivers/ptp/ptp_pch.c:78: warning: Function parameter or member 'tx_snap_lo' not described in 'pch_ts_regs'
 drivers/ptp/ptp_pch.c:78: warning: Function parameter or member 'tx_snap_hi' not described in 'pch_ts_regs'
 drivers/ptp/ptp_pch.c:78: warning: Function parameter or member 'rx_snap_lo' not described in 'pch_ts_regs'
 drivers/ptp/ptp_pch.c:78: warning: Function parameter or member 'rx_snap_hi' not described in 'pch_ts_regs'
 drivers/ptp/ptp_pch.c:78: warning: Function parameter or member 'src_uuid_lo' not described in 'pch_ts_regs'
 drivers/ptp/ptp_pch.c:78: warning: Function parameter or member 'src_uuid_hi' not described in 'pch_ts_regs'
 drivers/ptp/ptp_pch.c:78: warning: Function parameter or member 'can_status' not described in 'pch_ts_regs'
 drivers/ptp/ptp_pch.c:78: warning: Function parameter or member 'can_snap_lo' not described in 'pch_ts_regs'
 drivers/ptp/ptp_pch.c:78: warning: Function parameter or member 'can_snap_hi' not described in 'pch_ts_regs'
 drivers/ptp/ptp_pch.c:78: warning: Function parameter or member 'ts_sel' not described in 'pch_ts_regs'
 drivers/ptp/ptp_pch.c:78: warning: Function parameter or member 'ts_st' not described in 'pch_ts_regs'
 drivers/ptp/ptp_pch.c:78: warning: Function parameter or member 'reserve1' not described in 'pch_ts_regs'
 drivers/ptp/ptp_pch.c:78: warning: Function parameter or member 'stl_max_set_en' not described in 'pch_ts_regs'
 drivers/ptp/ptp_pch.c:78: warning: Function parameter or member 'stl_max_set' not described in 'pch_ts_regs'
 drivers/ptp/ptp_pch.c:78: warning: Function parameter or member 'reserve2' not described in 'pch_ts_regs'
 drivers/ptp/ptp_pch.c:78: warning: Function parameter or member 'srst' not described in 'pch_ts_regs'
 drivers/ptp/ptp_pch.c:121: warning: Function parameter or member 'regs' not described in 'pch_dev'
 drivers/ptp/ptp_pch.c:121: warning: Function parameter or member 'ptp_clock' not described in 'pch_dev'
 drivers/ptp/ptp_pch.c:121: warning: Function parameter or member 'caps' not described in 'pch_dev'
 drivers/ptp/ptp_pch.c:121: warning: Function parameter or member 'exts0_enabled' not described in 'pch_dev'
 drivers/ptp/ptp_pch.c:121: warning: Function parameter or member 'exts1_enabled' not described in 'pch_dev'
 drivers/ptp/ptp_pch.c:121: warning: Function parameter or member 'mem_base' not described in 'pch_dev'
 drivers/ptp/ptp_pch.c:121: warning: Function parameter or member 'mem_size' not described in 'pch_dev'
 drivers/ptp/ptp_pch.c:121: warning: Function parameter or member 'irq' not described in 'pch_dev'
 drivers/ptp/ptp_pch.c:121: warning: Function parameter or member 'pdev' not described in 'pch_dev'
 drivers/ptp/ptp_pch.c:121: warning: Function parameter or member 'register_lock' not described in 'pch_dev'
 drivers/ptp/ptp_pch.c:128: warning: Function parameter or member 'station' not described in 'pch_params'
 drivers/ptp/ptp_pch.c:291: warning: Function parameter or member 'pdev' not described in 'pch_set_station_address'

Cc: Richard Cochran <richardcochran@gmail.com>
Cc: LAPIS SEMICONDUCTOR <tshimizu818@gmail.com>
Cc: netdev@vger.kernel.org
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

Fixes the following W=1 kernel build warning(s):

 drivers/ptp/ptp_clockmatrix.c:1408: warning: Cannot understand  * @brief Maximum absolute value for write phase offset in picoseconds
 drivers/ptp/ptp_clockmatrix.c:1408: warning: Cannot understand  * @brief Maximum absolute value for write phase offset in picoseconds
 drivers/ptp/ptp_clockmatrix.c:1408: warning: Cannot understand  * @brief Maximum absolute value for write phase offset in picoseconds
 drivers/ptp/ptp_clockmatrix.c:1408: warning: Cannot understand  * @brief Maximum absolute value for write phase offset in picoseconds
 drivers/ptp/ptp_clockmatrix.c:1408: warning: Cannot understand  * @brief Maximum absolute value for write phase offset in picoseconds

Cc: Richard Cochran <richardcochran@gmail.com>
Cc: IDT-support-1588@lm.renesas.com
Cc: netdev@vger.kernel.org
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

Fixes the following W=1 kernel build warning(s):

 drivers/ptp/ptp_pch.c:193:6: warning: no previous prototype for ‘pch_ch_control_write’ [-Wmissing-prototypes]
 drivers/ptp/ptp_pch.c:201:5: warning: no previous prototype for ‘pch_ch_event_read’ [-Wmissing-prototypes]
 drivers/ptp/ptp_pch.c:212:6: warning: no previous prototype for ‘pch_ch_event_write’ [-Wmissing-prototypes]
 drivers/ptp/ptp_pch.c:220:5: warning: no previous prototype for ‘pch_src_uuid_lo_read’ [-Wmissing-prototypes]
 drivers/ptp/ptp_pch.c:231:5: warning: no previous prototype for ‘pch_src_uuid_hi_read’ [-Wmissing-prototypes]
 drivers/ptp/ptp_pch.c:242:5: warning: no previous prototype for ‘pch_rx_snap_read’ [-Wmissing-prototypes]
 drivers/ptp/ptp_pch.c:259:5: warning: no previous prototype for ‘pch_tx_snap_read’ [-Wmissing-prototypes]
 drivers/ptp/ptp_pch.c:300:5: warning: no previous prototype for ‘pch_set_station_address’ [-Wmissing-prototypes]

Cc: Richard Cochran <richardcochran@gmail.com> (maintainer:PTP HARDWARE CLOCK SUPPORT)
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: Flavio Suligoi <f.suligoi@asem.it>
Cc: netdev@vger.kernel.org
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

Fixes the following W=1 kernel build warning(s):

 drivers/ptp/ptp_pch.c:182:5: warning: no previous prototype for ‘pch_ch_control_read’ [-Wmissing-prototypes]

Cc: Richard Cochran <richardcochran@gmail.com> (maintainer:PTP HARDWARE CLOCK SUPPORT)
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: Flavio Suligoi <f.suligoi@asem.it>
Cc: netdev@vger.kernel.org
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

On some SoCs (e.g. BCM4908, BCM631[345]8) SF2 has an integrated
crossbar. It allows connecting its selected external ports to internal
ports. It's used by vendors to handle custom Ethernet setups.

BCM4908 has following 3x2 crossbar. On Asus GT-AC5300 rgmii is used for
connecting external BCM53134S switch. GPHY4 is usually used for WAN
port. More fancy devices use SerDes for 2.5 Gbps Ethernet.

              ┌──────────┐
SerDes ─── 0 ─┤          │
              │   3x2    ├─ 0 ─── switch port 7
 GPHY4 ─── 1 ─┤          │
              │ crossbar ├─ 1 ─── runner (accelerator)
 rgmii ─── 2 ─┤          │
              └──────────┘

Use setup data based on DT info to configure BCM4908's switch port 7.
Right now only GPHY and rgmii variants are supported. Handling SerDes
can be implemented later.
Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

It's needed later for proper switch / crossbar setup.
Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

All comment lines inside the comment block have been aligned.
Every line of comment starts with a * (uniformity in code).
Signed-off-by: Shubhankar Kuranagatti <shubhankarvk@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

It appears that each DMA channel has its own interrupt and both rings
can be configured (the same way) to handle interrupts.

1. Make ring interrupts code generic (make it operate on given ring)
2. Move napi to ring (so each has its own)
3. Make IRQ handler generic (match ring against received IRQ number)
4. Add (optional) support for TX interrupt
Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
Signed-off-by: David S. Miller <davem@davemloft.net>

I discovered that hardware actually supports two interrupts, one per DMA
channel (RX and TX).
Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
Signed-off-by: David S. Miller <davem@davemloft.net>

Robert Hancock says:

====================
macb SGMII fixed-link fixes

Some fixes to the macb driver for use in SGMII mode with a fixed-link (such as
for chip-to-chip connectivity).
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

When using a fixed-link configuration in SGMII mode, it's not really
sensible to have auto-negotiation enabled since the link settings are
fixed by definition. In other configurations, such as an SGMII
connection to a PHY, it should generally be enabled.
Signed-off-by: Robert Hancock <robert.hancock@calian.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

When using a fixed-link configuration with GEM in SGMII mode, such as
for a chip-to-chip interconnect, the link state was always showing as
established regardless of the actual connectivity state. We can monitor
the pcs_link_state bit in the Network Status register to determine
whether the PCS link state is actually up.
Signed-off-by: Robert Hancock <robert.hancock@calian.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Saeed Mahameed says:

====================
mlx5-updates-2021-03-12

1) TC support for ICMP parameters
2) TC connection tracking with mirroring
3) A round of trivial fixups and cleanups
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

Support matching on ICMPv4/6 type and code parameters using misc3
section of match parameters.
Signed-off-by: Maor Dickman <maord@nvidia.com>
Reviewed-by: Roi Dayan <roid@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

Add support for mirroring before the CT action by spliting the pre ct rule.
Mirror outputs are done first on the tc chain,prio table rule (the fwd
rule), which will then forward to a per port fwd table.
On this fwd table, we insert the original pre ct rule that forwards to
ct/ct nat table.
Signed-off-by: Paul Blakey <paulb@mellanox.com>
Signed-off-by: Maor Dickman <maord@nvidia.com>
Reviewed-by: Roi Dayan <roid@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

Multiple commands can be printed at the same time which can
lead to wrong order of their lines in dmesg output.
As a result, it's hard to match data dumps to the correct command
or which command was fully dumped at some point.

Fix this by displaying the corresponding command index, and also
indicate when a command was fully dumped.
Signed-off-by: Alaa Hleihel <alaa@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

Increasing the size of the indirection_rqt array from 128 to 256 bytes
pushed the stack usage of the mlx5e_hairpin_fill_rqt_rqns() function
over the warning limit when building with clang and CONFIG_KASAN:

drivers/net/ethernet/mellanox/mlx5/core/en_tc.c:970:1: error: stack frame size of 1180 bytes in function 'mlx5e_tc_add_nic_flow' [-Werror,-Wframe-larger-than=]

Using dynamic allocation here is safe because the caller does the
same, and it reduces the stack usage of the function to just a few
bytes.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Tariq Toukan <tariqt@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

Dump the ICOSQ's WQE descriptor when a completion with error is received.
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

Commit e20f0dbf ("net/mlx5e: RX, Add a prefetch command for small
L1_CACHE_BYTES") switched to using net_prefetchw at all places in mlx5e.
In the same time frame, commit 5af75c74 ("net/mlx5e: Enhanced TX
MPWQE for SKBs") added one more usage of prefetchw. When these two
changes were merged, this new occurrence of prefetchw wasn't replaced
with net_prefetchw.

This commit fixes this last occurrence of prefetchw in
mlx5e_tx_mpwqe_session_start, making the same change that was done in
mlx5e_xdp_mpwqe_session_start.
Signed-off-by: Maxim Mikityanskiy <maximmi@mellanox.com>
Reviewed-by: Saeed Mahameed <saeedm@nvidia.com>
Reviewed-by: Tariq Toukan <tariqt@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

Fix the following coccicheck warnings:

drivers/net/ethernet/mellanox/mlx5/core/devlink.c:145:29-66: WARNING
avoid newline at end of message in NL_SET_ERR_MSG_MOD
drivers/net/ethernet/mellanox/mlx5/core/devlink.c:140:29-77: WARNING
avoid newline at end of message in NL_SET_ERR_MSG_MOD
Signed-off-by: Roi Dayan <roid@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

Read congestion counters from all ports in any lag mode rather than
only in RoCE lag mode (e.g., VF lag).
Signed-off-by: Mark Zhang <markzhang@nvidia.com>
Reviewed-by: Saeed Mahameed <saeedm@nvidia.com>
Reviewed-by: Maor Gottlieb <maorg@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

Fix the following coccicheck warnings:

./drivers/net/ethernet/mellanox/mlx5/core/sf/devlink.c:495:2-3: Unneeded
semicolon.
Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Signed-off-by: Jiapeng Chong <jiapeng.chong@linux.alibaba.com>
Reviewed-by: Parav Pandit <parav@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>