platform/kernel/linux-rpi.git
4 years agoMerge branch 'net-sched-do-not-drop-root-lock-in-tcf_qevent_handle'
Jakub Kicinski [Thu, 16 Jul 2020 23:48:47 +0000 (16:48 -0700)]
Merge branch 'net-sched-do-not-drop-root-lock-in-tcf_qevent_handle'

Petr Machata says:

====================
net: sched: Do not drop root lock in tcf_qevent_handle()

Mirred currently does not mix well with blocks executed after the qdisc
root lock is taken. This includes classification blocks (such as in PRIO,
ETS, DRR qdiscs) and qevents. The locking caused by the packet mirrored by
mirred can cause deadlocks: either when the thread of execution attempts to
take the lock a second time, or when two threads end up waiting on each
other's locks.

The qevent patchset attempted to not introduce further badness of this
sort, and dropped the lock before executing the qevent block. However this
lead to too little locking and races between qdisc configuration and packet
enqueue in the RED qdisc.

Before the deadlock issues are solved in a way that can be applied across
many qdiscs reasonably easily, do for qevents what is done for the
classification blocks and just keep holding the root lock.

That is done in patch #1. Patch #2 then drops the now unnecessary root_lock
argument from Qdisc_ops.enqueue.
====================

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
4 years agoRevert "net: sched: Pass root lock to Qdisc_ops.enqueue"
Petr Machata [Tue, 14 Jul 2020 17:03:08 +0000 (20:03 +0300)]
Revert "net: sched: Pass root lock to Qdisc_ops.enqueue"

This reverts commit aebe4426ccaa4838f36ea805cdf7d76503e65117.

Signed-off-by: Petr Machata <petrm@mellanox.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
4 years agonet: sched: Do not drop root lock in tcf_qevent_handle()
Petr Machata [Tue, 14 Jul 2020 17:03:07 +0000 (20:03 +0300)]
net: sched: Do not drop root lock in tcf_qevent_handle()

Mirred currently does not mix well with blocks executed after the qdisc
root lock is taken. This includes classification blocks (such as in PRIO,
ETS, DRR qdiscs) and qevents. The locking caused by the packet mirrored by
mirred can cause deadlocks: either when the thread of execution attempts to
take the lock a second time, or when two threads end up waiting on each
other's locks.

The qevent patchset attempted to not introduce further badness of this
sort, and dropped the lock before executing the qevent block. However this
lead to too little locking and races between qdisc configuration and packet
enqueue in the RED qdisc.

Before the deadlock issues are solved in a way that can be applied across
many qdiscs reasonably easily, do for qevents what is done for the
classification blocks and just keep holding the root lock.

Signed-off-by: Petr Machata <petrm@mellanox.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
4 years agonet: mscc: ocelot: rethink Kconfig dependencies again
Vladimir Oltean [Sun, 12 Jul 2020 21:28:33 +0000 (00:28 +0300)]
net: mscc: ocelot: rethink Kconfig dependencies again

Having the users of MSCC_OCELOT_SWITCH_LIB depend on REGMAP_MMIO was a
bad idea, since that symbol is not user-selectable. So we should have
kept a 'select REGMAP_MMIO'.

When we do that, we run into 2 more problems:

- By depending on GENERIC_PHY, we are causing a recursive dependency.
  But it looks like GENERIC_PHY has no other dependencies, and other
  drivers select it, so we can select it too:

drivers/of/Kconfig:69:error: recursive dependency detected!
drivers/of/Kconfig:69:  symbol OF_IRQ depends on IRQ_DOMAIN
kernel/irq/Kconfig:68:  symbol IRQ_DOMAIN is selected by REGMAP
drivers/base/regmap/Kconfig:7:  symbol REGMAP default is visible depending on REGMAP_MMIO
drivers/base/regmap/Kconfig:39: symbol REGMAP_MMIO is selected by MSCC_OCELOT_SWITCH_LIB
drivers/net/ethernet/mscc/Kconfig:15:   symbol MSCC_OCELOT_SWITCH_LIB is selected by MSCC_OCELOT_SWITCH
drivers/net/ethernet/mscc/Kconfig:22:   symbol MSCC_OCELOT_SWITCH depends on GENERIC_PHY
drivers/phy/Kconfig:8:  symbol GENERIC_PHY is selected by PHY_BCM_NS_USB3
drivers/phy/broadcom/Kconfig:41:        symbol PHY_BCM_NS_USB3 depends on MDIO_BUS
drivers/net/phy/Kconfig:13:     symbol MDIO_BUS depends on MDIO_DEVICE
drivers/net/phy/Kconfig:6:      symbol MDIO_DEVICE is selected by PHYLIB
drivers/net/phy/Kconfig:254:    symbol PHYLIB is selected by ARC_EMAC_CORE
drivers/net/ethernet/arc/Kconfig:19:    symbol ARC_EMAC_CORE is selected by ARC_EMAC
drivers/net/ethernet/arc/Kconfig:25:    symbol ARC_EMAC depends on OF_IRQ

- By depending on PHYLIB, we are causing a recursive dependency. PHYLIB
  only has a single dependency, "depends on NETDEVICES", which we are
  already depending on, so we can again hack our way into conformance by
  turning the PHYLIB dependency into a select.

drivers/of/Kconfig:69:error: recursive dependency detected!
drivers/of/Kconfig:69:  symbol OF_IRQ depends on IRQ_DOMAIN
kernel/irq/Kconfig:68:  symbol IRQ_DOMAIN is selected by REGMAP
drivers/base/regmap/Kconfig:7:  symbol REGMAP default is visible depending on REGMAP_MMIO
drivers/base/regmap/Kconfig:39: symbol REGMAP_MMIO is selected by MSCC_OCELOT_SWITCH_LIB
drivers/net/ethernet/mscc/Kconfig:15:   symbol MSCC_OCELOT_SWITCH_LIB is selected by MSCC_OCELOT_SWITCH
drivers/net/ethernet/mscc/Kconfig:22:   symbol MSCC_OCELOT_SWITCH depends on PHYLIB
drivers/net/phy/Kconfig:254:    symbol PHYLIB is selected by ARC_EMAC_CORE
drivers/net/ethernet/arc/Kconfig:19:    symbol ARC_EMAC_CORE is selected by ARC_EMAC
drivers/net/ethernet/arc/Kconfig:25:    symbol ARC_EMAC depends on OF_IRQ

Fixes: f4d0323bae4e ("net: mscc: ocelot: convert MSCC_OCELOT_SWITCH into a library")
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
4 years agoaf_packet: TPACKET_V3: replace busy-wait loop
John Ogness [Tue, 7 Jul 2020 15:22:04 +0000 (17:28 +0206)]
af_packet: TPACKET_V3: replace busy-wait loop

A busy-wait loop is used to implement waiting for bits to be copied
from the skb to the kernel buffer before retiring a block. This is
a problem on PREEMPT_RT because the copying task could be preempted
by the busy-waiting task and thus live lock in the busy-wait loop.

Replace the busy-wait logic with an rwlock_t. This provides lockdep
coverage and makes the code RT ready.

Signed-off-by: John Ogness <john.ogness@linutronix.de>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
4 years agoMerge branch 'net-fec-a-few-improvements'
Jakub Kicinski [Thu, 16 Jul 2020 18:32:24 +0000 (11:32 -0700)]
Merge branch 'net-fec-a-few-improvements'

Sergey Organov says:

====================
net: fec: a few improvements

This is a collection of simple improvements that reduce and/or
simplify code. They got developed out of attempt to use DP83640 PTP
PHY connected to built-in FEC (that has its own PTP support) of the
iMX 6SX micro-controller. The primary bug-fix was now submitted
separately, and this is the rest of the changes.

NOTE: the patches are developed and tested on 4.9.146, and rebased on
top of recent 'net-next/master', where, besides visual inspection, I
only tested that they do compile.
====================

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
4 years agonet: fec: replace snprintf() with strlcpy() in fec_ptp_init()
Sergey Organov [Wed, 15 Jul 2020 15:43:00 +0000 (18:43 +0300)]
net: fec: replace snprintf() with strlcpy() in fec_ptp_init()

No need to use snprintf() on a constant string, nor using magic
constant in the fixed code was a good idea.

Signed-off-by: Sergey Organov <sorganov@gmail.com>
Acked-by: Fugang Duan <fugang.duan@nxp.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
4 years agonet: fec: get rid of redundant code in fec_ptp_set()
Sergey Organov [Wed, 15 Jul 2020 15:42:59 +0000 (18:42 +0300)]
net: fec: get rid of redundant code in fec_ptp_set()

Code of the form "if(x) x = 0" replaced with "x = 0".

Code of the form "if(x == a) x = a" removed.

Signed-off-by: Sergey Organov <sorganov@gmail.com>
Acked-by: Fugang Duan <fugang.duan@nxp.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
4 years agonet: fec: initialize clock with 0 rather than current kernel time
Sergey Organov [Wed, 15 Jul 2020 15:42:58 +0000 (18:42 +0300)]
net: fec: initialize clock with 0 rather than current kernel time

Initializing with 0 makes it much easier to identify time stamps from
otherwise uninitialized clock.

Initialization of PTP clock with current kernel time makes little sense as
PTP time scale differs from UTC time scale that kernel time represents.
It only leads to confusion when no actual PTP initialization happens, as
these time scales differ in a small integer number of seconds (37 at the
time of writing.)

Signed-off-by: Sergey Organov <sorganov@gmail.com>
Acked-by: Fugang Duan <fugang.duan@nxp.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
4 years agonet: fec: enable to use PPS feature without time stamping
Sergey Organov [Wed, 15 Jul 2020 15:42:57 +0000 (18:42 +0300)]
net: fec: enable to use PPS feature without time stamping

PPS feature could be useful even when hardware time stamping
of network packets is not in use, so remove offending check
for this condition from fec_ptp_enable_pps().

Signed-off-by: Sergey Organov <sorganov@gmail.com>
Acked-by: Fugang Duan <fugang.duan@nxp.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
4 years agonet: ipv6: drop duplicate word in comment
Randy Dunlap [Wed, 15 Jul 2020 16:42:46 +0000 (09:42 -0700)]
net: ipv6: drop duplicate word in comment

Drop the doubled word "by" in a comment.

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: netdev@vger.kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
4 years agonet: sctp: drop duplicate words in comments
Randy Dunlap [Wed, 15 Jul 2020 16:42:45 +0000 (09:42 -0700)]
net: sctp: drop duplicate words in comments

Drop doubled words in several comments.

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: netdev@vger.kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
4 years agonet: ip6_fib.h: drop duplicate word in comment
Randy Dunlap [Wed, 15 Jul 2020 16:42:44 +0000 (09:42 -0700)]
net: ip6_fib.h: drop duplicate word in comment

Drop doubled word "the" in a comment.

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: netdev@vger.kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
4 years agonet: dsa.h: drop duplicate word in comment
Randy Dunlap [Wed, 15 Jul 2020 16:42:43 +0000 (09:42 -0700)]
net: dsa.h: drop duplicate word in comment

Drop doubled word "to" in a comment.

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: netdev@vger.kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
4 years agonet: caif: drop duplicate words in comments
Randy Dunlap [Wed, 15 Jul 2020 16:42:42 +0000 (09:42 -0700)]
net: caif: drop duplicate words in comments

Drop doubled words "or" and "the" in several comments.

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: netdev@vger.kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
4 years agonet: 9p: drop duplicate word in comment
Randy Dunlap [Wed, 15 Jul 2020 16:42:41 +0000 (09:42 -0700)]
net: 9p: drop duplicate word in comment

Drop doubled word "not" in a comment.

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: netdev@vger.kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
4 years agonet: wimax: fix duplicate words in comments
Randy Dunlap [Wed, 15 Jul 2020 16:42:40 +0000 (09:42 -0700)]
net: wimax: fix duplicate words in comments

Drop doubled words in two comments.
Fix a spello/typo.

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: netdev@vger.kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
4 years agonet: skbuff.h: drop duplicate words in comments
Randy Dunlap [Wed, 15 Jul 2020 16:42:39 +0000 (09:42 -0700)]
net: skbuff.h: drop duplicate words in comments

Drop doubled words in several comments.

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: netdev@vger.kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
4 years agonet: qed: drop duplicate words in comments
Randy Dunlap [Wed, 15 Jul 2020 16:42:38 +0000 (09:42 -0700)]
net: qed: drop duplicate words in comments

Drop doubled word "the" in two comments.

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: netdev@vger.kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
4 years agodrivers: net: wan: Fix trivial spelling
Kieran Bingham [Wed, 15 Jul 2020 12:48:34 +0000 (13:48 +0100)]
drivers: net: wan: Fix trivial spelling

The word 'descriptor' is misspelled throughout the tree.

Fix it up accordingly:
    decriptor -> descriptor

Signed-off-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
4 years agoMerge branch 'mlxsw-reg-add-policer-bandwidth-limits'
Jakub Kicinski [Thu, 16 Jul 2020 01:10:41 +0000 (18:10 -0700)]
Merge branch 'mlxsw-reg-add-policer-bandwidth-limits'

Ido Schimmel says:

====================
mlxsw: Offload tc police action

This patch set adds support for tc police action in mlxsw.

Patches #1-#2 add defines for policer bandwidth limits and resource
identifiers (e.g., maximum number of policers).

Patch #3 adds a common policer core in mlxsw. Currently it is only used
by the policy engine, but future patch sets will use it for trap
policers and storm control policers. The common core allows us to share
common logic between all policer types and abstract certain details from
the various users in mlxsw.

Patch #4 exposes the maximum number of supported policers and their
current usage to user space via devlink-resource. This provides better
visibility and also used for selftests purposes.

Patches #5-#7 gradually add support for tc police action in the policy
engine by calling into previously mentioned policer core.

Patch #8 adds a generic selftest for tc-police that can be used with
veth pairs or physical loopbacks.

Patches #9-#11 add mlxsw-specific selftests.
====================

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
4 years agoselftests: mlxsw: Test policers' occupancy
Ido Schimmel [Wed, 15 Jul 2020 08:27:33 +0000 (11:27 +0300)]
selftests: mlxsw: Test policers' occupancy

Test that policers shared by different tc filters are correctly
reference counted by observing policers' occupancy via devlink-resource.

Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Reviewed-by: Petr Machata <petrm@mellanox.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
4 years agoselftests: mlxsw: Add scale test for tc-police
Ido Schimmel [Wed, 15 Jul 2020 08:27:32 +0000 (11:27 +0300)]
selftests: mlxsw: Add scale test for tc-police

Query the maximum number of supported policers using devlink-resource
and test that this number can be reached by configuring tc filters with
police action. Test that an error is returned in case the maximum number
is exceeded.

Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Reviewed-by: Petr Machata <petrm@mellanox.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
4 years agoselftests: mlxsw: tc_restrictions: Test tc-police restrictions
Ido Schimmel [Wed, 15 Jul 2020 08:27:31 +0000 (11:27 +0300)]
selftests: mlxsw: tc_restrictions: Test tc-police restrictions

Test that upper and lower limits on rate and burst size imposed by the
device are rejected by the kernel.

Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Reviewed-by: Petr Machata <petrm@mellanox.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
4 years agoselftests: forwarding: Add tc-police tests
Ido Schimmel [Wed, 15 Jul 2020 08:27:30 +0000 (11:27 +0300)]
selftests: forwarding: Add tc-police tests

Test tc-police action in various scenarios such as Rx policing, Tx
policing, shared policer and police piped to mirred. The test passes
with both veth pairs and loopbacked ports.

# ./tc_police.sh
TEST: police on rx                                                  [ OK ]
TEST: police on tx                                                  [ OK ]
TEST: police with shared policer - rx                               [ OK ]
TEST: police with shared policer - tx                               [ OK ]
TEST: police rx and mirror                                          [ OK ]
TEST: police tx and mirror                                          [ OK ]

Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Reviewed-by: Petr Machata <petrm@mellanox.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
4 years agomlxsw: spectrum_acl: Offload FLOW_ACTION_POLICE
Ido Schimmel [Wed, 15 Jul 2020 08:27:29 +0000 (11:27 +0300)]
mlxsw: spectrum_acl: Offload FLOW_ACTION_POLICE

Offload action police when used with a flower classifier. The number of
dropped packets is read from the policer and reported to tc.

Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Reviewed-by: Petr Machata <petrm@mellanox.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
4 years agomlxsw: core_acl_flex_actions: Add police action
Ido Schimmel [Wed, 15 Jul 2020 08:27:28 +0000 (11:27 +0300)]
mlxsw: core_acl_flex_actions: Add police action

Add core functionality required to support police action in the policy
engine.

The utilized hardware policers are stored in a hash table keyed by the
flow action index. This allows to support policer sharing between
multiple ACL rules.

Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Reviewed-by: Petr Machata <petrm@mellanox.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
4 years agomlxsw: core_acl_flex_actions: Work around hardware limitation
Ido Schimmel [Wed, 15 Jul 2020 08:27:27 +0000 (11:27 +0300)]
mlxsw: core_acl_flex_actions: Work around hardware limitation

In the policy engine, each ACL rule points to an action block where the
ACL actions are stored. Each action block consists of one or more action
sets. Each action set holds one or more individual actions, up to a
maximum queried from the device. For example:

                        Action set #1               Action set #2

+----------+          +--------------+            +--------------+
| ACL rule +---------->  Action #1   |      +----->  Action #4   |
+----------+          +--------------+      |     +--------------+
                      |  Action #2   |      |     |  Action #5   |
                      +--------------+      |     +--------------+
                      |  Action #3   +------+     |              |
                      +--------------+            +--------------+

                      <---------+ Action block +----------------->

The hardware has a limitation that prevents a policing action
(MLXSW_AFA_POLCNT_CODE when used with a policer, not a counter) from
being configured in the same action set with a trap action (i.e.,
MLXSW_AFA_TRAP_CODE or MLXSW_AFA_TRAPWU_CODE). Note that the latter used
to implement multiple actions: 'trap', 'mirred', 'drop'.

Work around this limitation by teaching mlxsw_afa_block_append_action()
to create a new action set not only when there is no more room left in
the current set, but also when there is a conflict between previously
mentioned actions.

Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Reviewed-by: Petr Machata <petrm@mellanox.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
4 years agomlxsw: spectrum_policer: Add devlink resource support
Ido Schimmel [Wed, 15 Jul 2020 08:27:26 +0000 (11:27 +0300)]
mlxsw: spectrum_policer: Add devlink resource support

Expose via devlink-resource the maximum number of single-rate policers
and their current occupancy. Example:

$ devlink resource show pci/0000:01:00.0
...
  name global_policers size 1000 unit entry dpipe_tables none
    resources:
      name single_rate_policers size 968 occ 0 unit entry dpipe_tables none

Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Reviewed-by: Petr Machata <petrm@mellanox.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
4 years agomlxsw: spectrum_policer: Add policer core
Ido Schimmel [Wed, 15 Jul 2020 08:27:25 +0000 (11:27 +0300)]
mlxsw: spectrum_policer: Add policer core

Add common code to handle all policer-related functionality in mlxsw.
Currently, only policer for policy engines are supported, but it in the
future more policer families will be added such as CPU (trap) policers
and storm control policers.

The API allows different modules to add / delete policers and read their
drop counter.

Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Reviewed-by: Petr Machata <petrm@mellanox.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
4 years agomlxsw: resources: Add resource identifier for global policers
Ido Schimmel [Wed, 15 Jul 2020 08:27:24 +0000 (11:27 +0300)]
mlxsw: resources: Add resource identifier for global policers

Add a resource identifier for maximum global policers so that it could
be later used to query the information from firmware.

Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Reviewed-by: Petr Machata <petrm@mellanox.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
4 years agomlxsw: reg: Add policer bandwidth limits
Ido Schimmel [Wed, 15 Jul 2020 08:27:23 +0000 (11:27 +0300)]
mlxsw: reg: Add policer bandwidth limits

Add policer bandwidth limits for both rate and burst size so that they
could be enforced by a later patch.

Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Reviewed-by: Petr Machata <petrm@mellanox.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
4 years agohinic: add firmware update support
Luo bin [Wed, 15 Jul 2020 07:30:23 +0000 (15:30 +0800)]
hinic: add firmware update support

add support to update firmware by the devlink flashing API

Signed-off-by: Luo bin <luobin9@huawei.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
4 years agodecnet: dn_dev: Remove an unnecessary label.
Suraj Upadhyay [Tue, 14 Jul 2020 14:23:28 +0000 (19:53 +0530)]
decnet: dn_dev: Remove an unnecessary label.

Remove the unnecessary label from dn_dev_ioctl() and make its error
handling simpler to read.

Signed-off-by: Suraj Upadhyay <usuraj35@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
4 years agodocs: networking: timestamping: add section for stacked PHC devices
Vladimir Oltean [Thu, 9 Jul 2020 20:17:33 +0000 (23:17 +0300)]
docs: networking: timestamping: add section for stacked PHC devices

The concept of timestamping DSA switches / Ethernet PHYs is becoming
more and more popular, however the Linux kernel timestamping code has
evolved quite organically and there's layers upon layers of new and old
code that need to work together for things to behave as expected.

Add this chapter to explain what the overall goals are.

Loosely based upon this email discussion plus some more info:
https://lkml.org/lkml/2020/7/6/481

Signed-off-by: Vladimir Oltean <olteanv@gmail.com>
Reviewed-by: Richard Cochran <richardcochran@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
4 years agonet: sundance: Replace HTTP links with HTTPS ones
Alexander A. Klimov [Thu, 9 Jul 2020 20:49:25 +0000 (22:49 +0200)]
net: sundance: Replace HTTP links with HTTPS ones

Rationale:
Reduces attack surface on kernel devs opening the links for MITM
as HTTPS traffic is much harder to manipulate.

Deterministic algorithm:
For each file:
  If not .svg:
    For each line:
      If doesn't contain `\bxmlns\b`:
        For each link, `\bhttp://[^# \t\r\n]*(?:\w|/)`:
  If neither `\bgnu\.org/license`, nor `\bmozilla\.org/MPL\b`:
            If both the HTTP and HTTPS versions
            return 200 OK and serve the same content:
              Replace HTTP with HTTPS.

Signed-off-by: Alexander A. Klimov <grandmaster@al2klimov.de>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
4 years agonetpoll: Remove unused inline function netpoll_netdev_init()
YueHaibing [Wed, 15 Jul 2020 02:52:03 +0000 (10:52 +0800)]
netpoll: Remove unused inline function netpoll_netdev_init()

commit d565b0a1a9b6 ("net: Add Generic Receive Offload infrastructure")
left behind this, remove it.

Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agomptcp: Remove unused inline function mptcp_rcv_synsent()
YueHaibing [Wed, 15 Jul 2020 02:36:13 +0000 (10:36 +0800)]
mptcp: Remove unused inline function mptcp_rcv_synsent()

commit 263e1201a2c3 ("mptcp: consolidate synack processing.")
left behind this, remove it.

Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Acked-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: flow: Remove unused inline function
YueHaibing [Wed, 15 Jul 2020 02:31:19 +0000 (10:31 +0800)]
net: flow: Remove unused inline function

It is not used since commit 09c7570480f7 ("xfrm: remove flow cache")

Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agocipso: Remove unused inline functions
YueHaibing [Wed, 15 Jul 2020 02:18:46 +0000 (10:18 +0800)]
cipso: Remove unused inline functions

They are not used any more since commit b1edeb102397 ("netlabel: Replace
protocol/NetLabel linking with refrerence counts")

Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Acked-by: Paul Moore <paul@paul-moore.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoMerge branch 'udp_tunnel-NIC-RX-port-offload-infrastructure'
David S. Miller [Wed, 15 Jul 2020 00:04:28 +0000 (17:04 -0700)]
Merge branch 'udp_tunnel-NIC-RX-port-offload-infrastructure'

Jakub Kicinski says:

====================
udp_tunnel: NIC RX port offload infrastructure

This set of patches converts further drivers to use the new
infrastructure to UDP tunnel port offload merged in
commit 0ea460474d70 ("Merge branch 'udp_tunnel-add-NIC-RX-port-offload-infrastructure'").

v3:
 - fix a W=1 build warning in qede.
v2:
 - fix a W=1 build warning in xgbe,
 - expand the size of tables for lio.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoqlcnic: convert to new udp_tunnel_nic infra
Jakub Kicinski [Tue, 14 Jul 2020 19:18:30 +0000 (12:18 -0700)]
qlcnic: convert to new udp_tunnel_nic infra

Straightforward conversion to new infra, 1 VxLAN port, handler
may sleep.

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoqede: convert to new udp_tunnel_nic infra
Jakub Kicinski [Tue, 14 Jul 2020 19:18:29 +0000 (12:18 -0700)]
qede: convert to new udp_tunnel_nic infra

Covert to new infra. Looks like this driver was not doing
ref counting, and sleeping in the callback.

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agofm10k: convert to new udp_tunnel_nic infra
Jakub Kicinski [Tue, 14 Jul 2020 19:18:28 +0000 (12:18 -0700)]
fm10k: convert to new udp_tunnel_nic infra

Straightforward conversion to new infra. Driver restores info
after close/open cycle by calling its internal restore function
so just use that, no need for udp_tunnel_nic_reset_ntf() here.

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoliquidio_vf: convert to new udp_tunnel_nic infra
Jakub Kicinski [Tue, 14 Jul 2020 19:18:27 +0000 (12:18 -0700)]
liquidio_vf: convert to new udp_tunnel_nic infra

Carbon copy of the previous change.

This driver is just a super thin FW interface, but Derek let us
know the table has 1024 entries.

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoliquidio: convert to new udp_tunnel_nic infra
Jakub Kicinski [Tue, 14 Jul 2020 19:18:26 +0000 (12:18 -0700)]
liquidio: convert to new udp_tunnel_nic infra

This driver is just a super thin FW interface, but Derek let us
know the table has 1024 entries.

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoenic: convert to new udp_tunnel_nic infra
Jakub Kicinski [Tue, 14 Jul 2020 19:18:25 +0000 (12:18 -0700)]
enic: convert to new udp_tunnel_nic infra

Convert to new infra, now the refcounting will be correct,
and driver gets port replay of other ports when offloaded
port gets removed.

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agocxgb4: convert to new udp_tunnel_nic infra
Jakub Kicinski [Tue, 14 Jul 2020 19:18:24 +0000 (12:18 -0700)]
cxgb4: convert to new udp_tunnel_nic infra

Convert to new infra, this driver is very simple. The check of
adapter->rawf_cnt in cxgb_udp_tunnel_unset_port() is kept from
the old port deletion function but it's dodgy since nothing ever
updates that member once its set during init. Also .set_port
callback always adds the raw mac filter..

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agobnx2x: convert to new udp_tunnel_nic infra
Jakub Kicinski [Tue, 14 Jul 2020 19:18:23 +0000 (12:18 -0700)]
bnx2x: convert to new udp_tunnel_nic infra

Fairly straightforward conversion - no need to keep track
of the use count, and replay when ports get removed, also
callbacks can just sleep.

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoxgbe: convert to new udp_tunnel_nic infra
Jakub Kicinski [Tue, 14 Jul 2020 19:18:22 +0000 (12:18 -0700)]
xgbe: convert to new udp_tunnel_nic infra

Make use of the new udp_tunnel_nic infra. Don't clear the features
when VxLAN port is not present to make all drivers behave the same.
Driver will now (until we address the problem in the core) leave
the RX UDP tunnel feature always on, since this is what most drivers
do.

Remove the list of VxLAN ports, just program the one core told us to.

The driver seem to want to clear the VxLAN ports on close but it
doesn't seem to flush the port list properly so it'd get wrong
use counts after close/open. Again since it calls its own open
handler we need the reset notification hack.

v2:
 - fix kbuild warning

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoxgbe: switch to more generic VxLAN detection
Jakub Kicinski [Tue, 14 Jul 2020 19:18:21 +0000 (12:18 -0700)]
xgbe: switch to more generic VxLAN detection

Instead of looping though the list of ports just check
if the geometry of the packet is correct for VxLAN.
HW most likely doesn't care about the exact port, anyway,
since only first port is actually offloaded, and this way
we won't have to maintain the port list at all.

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agobe2net: convert to new udp_tunnel_nic infra
Jakub Kicinski [Tue, 14 Jul 2020 19:18:20 +0000 (12:18 -0700)]
be2net: convert to new udp_tunnel_nic infra

Convert be2net to new udp_tunnel_nic infra. NIC only takes one VxLAN
port. Remove the port tracking using a list. The warning in
be_work_del_vxlan_port() looked suspicious - like the driver expected
ports to be removed in order of addition.

be2net unregisters ports when going down and re-registers them (for
skyhawk) when coming up, but it never checks if the device is up
in the add_port / del_port callbacks. Make it use
UDP_TUNNEL_NIC_INFO_OPEN_ONLY. Sadly this driver calls its own
open/close functions directly so the udp_tunnel_nic_reset_ntf()
workaround is needed.

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonfp: convert to new udp_tunnel_nic infra
Jakub Kicinski [Tue, 14 Jul 2020 19:18:19 +0000 (12:18 -0700)]
nfp: convert to new udp_tunnel_nic infra

NFP conversion is pretty straightforward. We want to be able
to sleep, and only get callbacks when the device is open.

NFP did not ask for port replay when ports were removed, now
new infra will provide this feature for free.

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Reviewed-by: Simon Horman <simon.horman@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next
David S. Miller [Wed, 15 Jul 2020 00:00:52 +0000 (17:00 -0700)]
Merge git://git./linux/kernel/git/bpf/bpf-next

Alexei Starovoitov says:

====================
pull-request: bpf-next 2020-07-14

The following pull-request contains BPF updates for your *net-next* tree.

We've added 21 non-merge commits during the last 1 day(s) which contain
a total of 20 files changed, 308 insertions(+), 279 deletions(-).

The main changes are:

1) Fix selftests/bpf build, from Alexei.

2) Fix resolve_btfids build issues, from Jiri.

3) Pull usermode-driver-cleanup set, from Eric.

4) Two minor fixes to bpfilter, from Alexei and Masahiro.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoksz884x: switch from 'pci_' to 'dma_' API
Christophe JAILLET [Tue, 14 Jul 2020 18:35:01 +0000 (20:35 +0200)]
ksz884x: switch from 'pci_' to 'dma_' API

The wrappers in include/linux/pci-dma-compat.h should go away.

The patch has been generated with the coccinelle script below and has been
hand modified to replace GFP_ with a correct flag.
It has been compile tested.

When memory is allocated in 'ksz_alloc_desc()', GFP_KERNEL can be used
because a few lines below, GFP_KERNEL is also used in the
'ksz_alloc_soft_desc()' calls.

@@
@@
-    PCI_DMA_BIDIRECTIONAL
+    DMA_BIDIRECTIONAL

@@
@@
-    PCI_DMA_TODEVICE
+    DMA_TO_DEVICE

@@
@@
-    PCI_DMA_FROMDEVICE
+    DMA_FROM_DEVICE

@@
@@
-    PCI_DMA_NONE
+    DMA_NONE

@@
expression e1, e2, e3;
@@
-    pci_alloc_consistent(e1, e2, e3)
+    dma_alloc_coherent(&e1->dev, e2, e3, GFP_)

@@
expression e1, e2, e3;
@@
-    pci_zalloc_consistent(e1, e2, e3)
+    dma_alloc_coherent(&e1->dev, e2, e3, GFP_)

@@
expression e1, e2, e3, e4;
@@
-    pci_free_consistent(e1, e2, e3, e4)
+    dma_free_coherent(&e1->dev, e2, e3, e4)

@@
expression e1, e2, e3, e4;
@@
-    pci_map_single(e1, e2, e3, e4)
+    dma_map_single(&e1->dev, e2, e3, e4)

@@
expression e1, e2, e3, e4;
@@
-    pci_unmap_single(e1, e2, e3, e4)
+    dma_unmap_single(&e1->dev, e2, e3, e4)

@@
expression e1, e2, e3, e4, e5;
@@
-    pci_map_page(e1, e2, e3, e4, e5)
+    dma_map_page(&e1->dev, e2, e3, e4, e5)

@@
expression e1, e2, e3, e4;
@@
-    pci_unmap_page(e1, e2, e3, e4)
+    dma_unmap_page(&e1->dev, e2, e3, e4)

@@
expression e1, e2, e3, e4;
@@
-    pci_map_sg(e1, e2, e3, e4)
+    dma_map_sg(&e1->dev, e2, e3, e4)

@@
expression e1, e2, e3, e4;
@@
-    pci_unmap_sg(e1, e2, e3, e4)
+    dma_unmap_sg(&e1->dev, e2, e3, e4)

@@
expression e1, e2, e3, e4;
@@
-    pci_dma_sync_single_for_cpu(e1, e2, e3, e4)
+    dma_sync_single_for_cpu(&e1->dev, e2, e3, e4)

@@
expression e1, e2, e3, e4;
@@
-    pci_dma_sync_single_for_device(e1, e2, e3, e4)
+    dma_sync_single_for_device(&e1->dev, e2, e3, e4)

@@
expression e1, e2, e3, e4;
@@
-    pci_dma_sync_sg_for_cpu(e1, e2, e3, e4)
+    dma_sync_sg_for_cpu(&e1->dev, e2, e3, e4)

@@
expression e1, e2, e3, e4;
@@
-    pci_dma_sync_sg_for_device(e1, e2, e3, e4)
+    dma_sync_sg_for_device(&e1->dev, e2, e3, e4)

@@
expression e1, e2;
@@
-    pci_dma_mapping_error(e1, e2)
+    dma_mapping_error(&e1->dev, e2)

@@
expression e1, e2;
@@
-    pci_set_dma_mask(e1, e2)
+    dma_set_mask(&e1->dev, e2)

@@
expression e1, e2;
@@
-    pci_set_consistent_dma_mask(e1, e2)
+    dma_set_coherent_mask(&e1->dev, e2)

Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoMerge branch 'r8169-add-support-for-RTL8125B'
David S. Miller [Tue, 14 Jul 2020 22:07:17 +0000 (15:07 -0700)]
Merge branch 'r8169-add-support-for-RTL8125B'

Heiner Kallweit says:

====================
r8169: add support for RTL8125B

This series adds support for RTL8125B rev.b.
Tested with a Delock 89564 PCIe card.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agor8169: add support for RTL8125B
Heiner Kallweit [Tue, 14 Jul 2020 15:46:03 +0000 (17:46 +0200)]
r8169: add support for RTL8125B

Add support for RTL8125B rev.b. In my tests 2.5Gbps worked well
w/o firmware, however for a stable link at 1Gbps firmware revision
0.0.2 is needed.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: phy: realtek: add support for RTL8125B-internal PHY
Heiner Kallweit [Tue, 14 Jul 2020 15:45:03 +0000 (17:45 +0200)]
net: phy: realtek: add support for RTL8125B-internal PHY

Realtek assigned a new PHY ID for the RTL8125B-internal PHY.
It's however compatible with the RTL8125A-internal PHY.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoMerge branch 's390-qeth-next'
David S. Miller [Tue, 14 Jul 2020 21:53:45 +0000 (14:53 -0700)]
Merge branch 's390-qeth-next'

Julian Wiedmann says:

====================
s390/qeth: updates 2020-07-14

please apply the following patch series for qeth to netdev's net-next tree.

This brings a mix of cleanups for various parts of the control code.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agos390/qeth: constify the MPC initialization data
Julian Wiedmann [Tue, 14 Jul 2020 14:23:05 +0000 (16:23 +0200)]
s390/qeth: constify the MPC initialization data

We're not modifying these data blobs, so mark them as constant.

Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agos390/qeth: unify RX-mode hashtables
Julian Wiedmann [Tue, 14 Jul 2020 14:23:04 +0000 (16:23 +0200)]
s390/qeth: unify RX-mode hashtables

To keep track of the addresses programmed from an RX modeset, we have
two separate hashtables (L2: mac_htable, L3: ip_mc_htable).

These are never used at the same time, so unify them into a single
rx_mode_addrs hashtable.

Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agos390/qeth: cleanup OAT code
Julian Wiedmann [Tue, 14 Jul 2020 14:23:03 +0000 (16:23 +0200)]
s390/qeth: cleanup OAT code

While initially just trying to fix up the indentation, condense a few
lines and get rid of a goto label.

Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agos390/qeth: clean up a magic number in the OAT callback
Julian Wiedmann [Tue, 14 Jul 2020 14:23:02 +0000 (16:23 +0200)]
s390/qeth: clean up a magic number in the OAT callback

Use the correct struct member instead of hardcoding its offset.

Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agos390/qeth: use u64_to_user_ptr() in the OAT code
Julian Wiedmann [Tue, 14 Jul 2020 14:23:01 +0000 (16:23 +0200)]
s390/qeth: use u64_to_user_ptr() in the OAT code

Use the correct helper for casting to a user pointer.

Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agos390/qeth: clean up error handling for isolation mode cmds
Julian Wiedmann [Tue, 14 Jul 2020 14:23:00 +0000 (16:23 +0200)]
s390/qeth: clean up error handling for isolation mode cmds

As the cmd IO path has learned to propagate errnos back to its callers,
let them deal with errors instead of trying to restore their previous
configuration from within the IO error path.

Also translate the HW error to a meaningful errno, instead of returning
-EIO for all cases (and don't map this to -EOPNOTSUPP later on...).

While at it, add a READ_ONCE() / WRITE_ONCE() pair to ensure that the
data path always sees a valid isolation mode during reconfiguration.

Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agos390/qeth: don't clear the configured isolation mode
Julian Wiedmann [Tue, 14 Jul 2020 14:22:59 +0000 (16:22 +0200)]
s390/qeth: don't clear the configured isolation mode

When qeth_set_access_ctrl_online() is called during the device's
initialization and discovers that isolation mode isn't supported, don't
clear the user's currently configured mode.
They intentionally choose to operate the device in this specific mode,
and degrading the isolation is not an option.

Only adjust the configuration when called via sysfs (ie. fallback = 1),
and here follow the common pattern and restore it from prev_isolation.

Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agos390/qeth: only init the isolation mode when necessary
Julian Wiedmann [Tue, 14 Jul 2020 14:22:58 +0000 (16:22 +0200)]
s390/qeth: only init the isolation mode when necessary

A newly initialized device defaults to ISOLATION_MODE_NONE, don't bother
with programming this a second time.

Then remove the OSD/OSX check, it's already done in the sysfs path
whenever the user actually changes the configuration.

Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agos390/qeth: fine-tune errno when cmds are cancelled
Julian Wiedmann [Tue, 14 Jul 2020 14:22:57 +0000 (16:22 +0200)]
s390/qeth: fine-tune errno when cmds are cancelled

If we cancel all pending cmds (eg. when tearing down the device), don't
blame it on an IO error.

Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agos390/qeth: reject unsupported link type earlier
Julian Wiedmann [Tue, 14 Jul 2020 14:22:56 +0000 (16:22 +0200)]
s390/qeth: reject unsupported link type earlier

Rather than delaying the decision until netdev setup, immediately reject
a device when we discover that it has an unsupported link type
(ie. Token Ring).

Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoMerge branch 'mlxsw-Mirror-to-CPU-preparations'
David S. Miller [Tue, 14 Jul 2020 21:50:50 +0000 (14:50 -0700)]
Merge branch 'mlxsw-Mirror-to-CPU-preparations'

Ido Schimmel says:

====================
mlxsw: Mirror to CPU preparations

A future patch set will add the ability to trap packets that were
dropped due to buffer related reasons (e.g., early drop). Internally
this is implemented by mirroring these packets towards the CPU port.
This patch set adds the required infrastructure to enable such
mirroring.

Patches #1-#2 extend two registers needed for above mentioned
functionality.

Patches #3-#6 gradually add support for setting the mirroring target of
a SPAN (mirroring) agent as the CPU port. This is only supported from
Spectrum-2 onwards, so an error is returned for Spectrum-1.

Patches #7-#8 add the ability to set a policer on a SPAN agent. This is
required because unlike regularly trapped packets, a policer cannot be
set on the trap group with which the mirroring trap is associated.

Patches #9-#12 parse the mirror reason field from the Completion Queue
Element (CQE). Unlike other trapped packets, the trap identifier of
mirrored packets only indicates that the packet was mirrored, but not
why. The reason (e.g., tail drop) is encoded in the mirror reason field.

Patch #13 utilizes the mirror reason field in order to lookup the
matching Rx listener. This allows us to maintain the abstraction that an
Rx listener is mapped to a single trap reason. Without taking the mirror
reason into account we would need to register a single Rx listener for
all mirrored packets.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agomlxsw: core: Use mirror reason during Rx listener lookup
Ido Schimmel [Tue, 14 Jul 2020 14:21:06 +0000 (17:21 +0300)]
mlxsw: core: Use mirror reason during Rx listener lookup

The Rx listener abstraction allows the switch driver (e.g.,
mlxsw_spectrum) to register a function that is called when a packet is
received (trapped) for a specific reason.

Up until now, the Rx listener lookup was solely based on the trap
identifier. However, when a packet is mirrored to the CPU the trap
identifier merely indicates that the packet was mirrored, but not why it
was mirrored. This makes it impossible for the switch driver to register
different Rx listeners for different mirror reasons.

Solve this by allowing the switch driver to register a Rx listener with
a mirror reason and by extending the Rx listener lookup to take the
mirror reason into account.

Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Petr Machata <petrm@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agomlxsw: pci: Retrieve mirror reason from CQE during receive
Ido Schimmel [Tue, 14 Jul 2020 14:21:05 +0000 (17:21 +0300)]
mlxsw: pci: Retrieve mirror reason from CQE during receive

In case the mirror reason is valid, retrieve it into the Rx information
so that it could be used during listener lookup in a later patch.

Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Petr Machata <petrm@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agomlxsw: pci: Add mirror reason field to CQEv2
Ido Schimmel [Tue, 14 Jul 2020 14:21:04 +0000 (17:21 +0300)]
mlxsw: pci: Add mirror reason field to CQEv2

The Completion Queue Element version 2 (CQEv2) includes a field called
'mirror_reason' which indicates why the packet was mirrored to the CPU.

Add the field so that it can be used by a later patch.

Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Petr Machata <petrm@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agomlxsw: trap: Add trap identifiers for mirrored packets
Ido Schimmel [Tue, 14 Jul 2020 14:21:03 +0000 (17:21 +0300)]
mlxsw: trap: Add trap identifiers for mirrored packets

Packets that are mirrored to the CPU port are trapped with one of eight
trap identifiers. Add them.

Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Petr Machata <petrm@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agomlxsw: reg: Increase trap identifier to 10 bits
Amit Cohen [Tue, 14 Jul 2020 14:21:02 +0000 (17:21 +0300)]
mlxsw: reg: Increase trap identifier to 10 bits

The trap identifier was increased to 10 bits in new versions of the
Programmer's Reference Manual (PRM).

Increase it accordingly in the Host PacKet Trap (HPKT) register and in
the Completion Queue Element (CQE).

This is significant for subsequent patches that will introduce trap
identifiers which utilize the extended range.

Signed-off-by: Amit Cohen <amitc@mellanox.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Petr Machata <petrm@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agomlxsw: spectrum_span: Allow setting policer on a SPAN agent
Ido Schimmel [Tue, 14 Jul 2020 14:21:01 +0000 (17:21 +0300)]
mlxsw: spectrum_span: Allow setting policer on a SPAN agent

When mirroring packets to the CPU port the mirrored packets are trapped
to the CPU. However, unlike other traps, it is not possible to set a
policer on the associated trap group. Instead, the policer needs to be
set on the SPAN agent.

Moreover, the policer ID must be within a specified range: From a
configurable (even) base ID to this base plus the maximum number of SPAN
agents.

While the immediate use case is to set the policer on a SPAN agent that
mirrors to the CPU port, a policer can be set on any SPAN agent.
Therefore, the operation is implemented for all SPAN agent types.

Extend the SPAN agent request API to allow passing the desired policer
ID that should be bound to the SPAN agent. Return an error for
Spectrum-1, as it does not support policer setting on a SPAN agent.

Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Petr Machata <petrm@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agomlxsw: spectrum_span: Allow passing parameters to SPAN agents
Ido Schimmel [Tue, 14 Jul 2020 14:21:00 +0000 (17:21 +0300)]
mlxsw: spectrum_span: Allow passing parameters to SPAN agents

Currently, the only parameter of a SPAN agent is the netdev which
the SPAN agent should mirror to.

The next patch will add the ability to request a SPAN agent that mirrors
to a specific netdev and has a specific policer ID bound to it. This is
required when mirroring packets to the CPU port.

Therefore, encapsulate the sole parameter to mlxsw_sp_span_agent_get()
in a structure, so that it could later be extended with policer
information.

Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Petr Machata <petrm@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agomlxsw: spectrum_span: Add support for mirroring towards CPU port
Ido Schimmel [Tue, 14 Jul 2020 14:20:59 +0000 (17:20 +0300)]
mlxsw: spectrum_span: Add support for mirroring towards CPU port

The Spectrum-2 and Spectrum-3 ASICs are able to mirror packets towards
the CPU. These packets are then trapped like any other packet, but with
a special packet trap and additional metadata such as why the packet was
mirrored.

The ability to mirror packets towards the CPU will be utilized by a
subsequent patch set that will mirror packets that were dropped by the
ASIC for various buffer-related reasons, such as tail-drop and
early-drop.

Add mirroring towards the CPU as a new SPAN agent type and re-use the
functions that mirror to a physical port where possible.

Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Petr Machata <petrm@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agomlxsw: spectrum_span: Do not dereference destination netdev
Ido Schimmel [Tue, 14 Jul 2020 14:20:58 +0000 (17:20 +0300)]
mlxsw: spectrum_span: Do not dereference destination netdev

Currently, the destination netdev to which we mirror must be a valid
netdev. However, this is going to change with the introduction of
mirroring towards the CPU port, as the CPU port does not have a backing
netdev.

Avoid dereferencing the destination netdev when it is not clear if it is
valid or not.

Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Petr Machata <petrm@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agomlxsw: spectrum_span: Add driver private info to parms_set() callback
Ido Schimmel [Tue, 14 Jul 2020 14:20:57 +0000 (17:20 +0300)]
mlxsw: spectrum_span: Add driver private info to parms_set() callback

The parms_set() callback is supposed to fill in the parameters for the
SPAN agent, such as the destination port and encapsulation info, if any.

When mirroring to the CPU port we cannot resolve the destination port
(the CPU port) without access to the driver private info.

Pass the driver private info to parms_set() callback so that it could be
used later on to resolve the CPU port.

Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Petr Machata <petrm@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agomlxsw: spectrum_span: Add per-ASIC SPAN agent operations
Ido Schimmel [Tue, 14 Jul 2020 14:20:56 +0000 (17:20 +0300)]
mlxsw: spectrum_span: Add per-ASIC SPAN agent operations

The various SPAN agent types differ in their mirror targets (i.e.,
physical port netdev vs. VLAN netdev) and the encapsulation headers that
they need to encapsulate the mirrored packets with.

The Spectrum-2 and Spectrum-3 ASICs support a SPAN agent type that is
able to mirror towards the CPU, whereas the Spectrum-1 ASIC does not.

Prepare for the addition of this new SPAN agent type by splitting the
SPAN agent operations to be per-ASIC.

Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Petr Machata <petrm@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agomlxsw: reg: add mirroring_pid_base to MOGCR register
Amit Cohen [Tue, 14 Jul 2020 14:20:55 +0000 (17:20 +0300)]
mlxsw: reg: add mirroring_pid_base to MOGCR register

Allow setting mirroring_pid_base using MOGCR register.

Signed-off-by: Amit Cohen <amitc@mellanox.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Petr Machata <petrm@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agomlxsw: reg: Add session_id and pid to MPAT register
Amit Cohen [Tue, 14 Jul 2020 14:20:54 +0000 (17:20 +0300)]
mlxsw: reg: Add session_id and pid to MPAT register

Allow setting session_id and pid as part of port analyzer
configurations.

Signed-off-by: Amit Cohen <amitc@mellanox.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Petr Machata <petrm@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: neterion: vxge: switch from 'pci_' to 'dma_' API
Christophe JAILLET [Tue, 14 Jul 2020 09:14:12 +0000 (11:14 +0200)]
net: neterion: vxge: switch from 'pci_' to 'dma_' API

The wrappers in include/linux/pci-dma-compat.h should go away.

The patch has been generated with the coccinelle script below. No GFP_
flag needs to be corrected.
It has been compile tested.

@@
@@
-    PCI_DMA_BIDIRECTIONAL
+    DMA_BIDIRECTIONAL

@@
@@
-    PCI_DMA_TODEVICE
+    DMA_TO_DEVICE

@@
@@
-    PCI_DMA_FROMDEVICE
+    DMA_FROM_DEVICE

@@
@@
-    PCI_DMA_NONE
+    DMA_NONE

@@
expression e1, e2, e3;
@@
-    pci_alloc_consistent(e1, e2, e3)
+    dma_alloc_coherent(&e1->dev, e2, e3, GFP_)

@@
expression e1, e2, e3;
@@
-    pci_zalloc_consistent(e1, e2, e3)
+    dma_alloc_coherent(&e1->dev, e2, e3, GFP_)

@@
expression e1, e2, e3, e4;
@@
-    pci_free_consistent(e1, e2, e3, e4)
+    dma_free_coherent(&e1->dev, e2, e3, e4)

@@
expression e1, e2, e3, e4;
@@
-    pci_map_single(e1, e2, e3, e4)
+    dma_map_single(&e1->dev, e2, e3, e4)

@@
expression e1, e2, e3, e4;
@@
-    pci_unmap_single(e1, e2, e3, e4)
+    dma_unmap_single(&e1->dev, e2, e3, e4)

@@
expression e1, e2, e3, e4, e5;
@@
-    pci_map_page(e1, e2, e3, e4, e5)
+    dma_map_page(&e1->dev, e2, e3, e4, e5)

@@
expression e1, e2, e3, e4;
@@
-    pci_unmap_page(e1, e2, e3, e4)
+    dma_unmap_page(&e1->dev, e2, e3, e4)

@@
expression e1, e2, e3, e4;
@@
-    pci_map_sg(e1, e2, e3, e4)
+    dma_map_sg(&e1->dev, e2, e3, e4)

@@
expression e1, e2, e3, e4;
@@
-    pci_unmap_sg(e1, e2, e3, e4)
+    dma_unmap_sg(&e1->dev, e2, e3, e4)

@@
expression e1, e2, e3, e4;
@@
-    pci_dma_sync_single_for_cpu(e1, e2, e3, e4)
+    dma_sync_single_for_cpu(&e1->dev, e2, e3, e4)

@@
expression e1, e2, e3, e4;
@@
-    pci_dma_sync_single_for_device(e1, e2, e3, e4)
+    dma_sync_single_for_device(&e1->dev, e2, e3, e4)

@@
expression e1, e2, e3, e4;
@@
-    pci_dma_sync_sg_for_cpu(e1, e2, e3, e4)
+    dma_sync_sg_for_cpu(&e1->dev, e2, e3, e4)

@@
expression e1, e2, e3, e4;
@@
-    pci_dma_sync_sg_for_device(e1, e2, e3, e4)
+    dma_sync_sg_for_device(&e1->dev, e2, e3, e4)

@@
expression e1, e2;
@@
-    pci_dma_mapping_error(e1, e2)
+    dma_mapping_error(&e1->dev, e2)

@@
expression e1, e2;
@@
-    pci_set_dma_mask(e1, e2)
+    dma_set_mask(&e1->dev, e2)

@@
expression e1, e2;
@@
-    pci_set_consistent_dma_mask(e1, e2)
+    dma_set_coherent_mask(&e1->dev, e2)

Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: neterion: s2io: switch from 'pci_' to 'dma_' API
Christophe JAILLET [Tue, 14 Jul 2020 09:06:20 +0000 (11:06 +0200)]
net: neterion: s2io: switch from 'pci_' to 'dma_' API

The wrappers in include/linux/pci-dma-compat.h should go away.

The patch has been generated with the coccinelle script below and has been
hand modified to replace GPF_ with a correct flag.
It has been compile tested.

When memory is allocated in 'init_shared_mem()' GFP_KERNEL can be used
because this flag is already used to allocate some memory in this function.

While at it, update some debug message to match the new function names.

@@
@@
-    PCI_DMA_BIDIRECTIONAL
+    DMA_BIDIRECTIONAL

@@
@@
-    PCI_DMA_TODEVICE
+    DMA_TO_DEVICE

@@
@@
-    PCI_DMA_FROMDEVICE
+    DMA_FROM_DEVICE

@@
@@
-    PCI_DMA_NONE
+    DMA_NONE

@@
expression e1, e2, e3;
@@
-    pci_alloc_consistent(e1, e2, e3)
+    dma_alloc_coherent(&e1->dev, e2, e3, GFP_)

@@
expression e1, e2, e3;
@@
-    pci_zalloc_consistent(e1, e2, e3)
+    dma_alloc_coherent(&e1->dev, e2, e3, GFP_)

@@
expression e1, e2, e3, e4;
@@
-    pci_free_consistent(e1, e2, e3, e4)
+    dma_free_coherent(&e1->dev, e2, e3, e4)

@@
expression e1, e2, e3, e4;
@@
-    pci_map_single(e1, e2, e3, e4)
+    dma_map_single(&e1->dev, e2, e3, e4)

@@
expression e1, e2, e3, e4;
@@
-    pci_unmap_single(e1, e2, e3, e4)
+    dma_unmap_single(&e1->dev, e2, e3, e4)

@@
expression e1, e2, e3, e4, e5;
@@
-    pci_map_page(e1, e2, e3, e4, e5)
+    dma_map_page(&e1->dev, e2, e3, e4, e5)

@@
expression e1, e2, e3, e4;
@@
-    pci_unmap_page(e1, e2, e3, e4)
+    dma_unmap_page(&e1->dev, e2, e3, e4)

@@
expression e1, e2, e3, e4;
@@
-    pci_map_sg(e1, e2, e3, e4)
+    dma_map_sg(&e1->dev, e2, e3, e4)

@@
expression e1, e2, e3, e4;
@@
-    pci_unmap_sg(e1, e2, e3, e4)
+    dma_unmap_sg(&e1->dev, e2, e3, e4)

@@
expression e1, e2, e3, e4;
@@
-    pci_dma_sync_single_for_cpu(e1, e2, e3, e4)
+    dma_sync_single_for_cpu(&e1->dev, e2, e3, e4)

@@
expression e1, e2, e3, e4;
@@
-    pci_dma_sync_single_for_device(e1, e2, e3, e4)
+    dma_sync_single_for_device(&e1->dev, e2, e3, e4)

@@
expression e1, e2, e3, e4;
@@
-    pci_dma_sync_sg_for_cpu(e1, e2, e3, e4)
+    dma_sync_sg_for_cpu(&e1->dev, e2, e3, e4)

@@
expression e1, e2, e3, e4;
@@
-    pci_dma_sync_sg_for_device(e1, e2, e3, e4)
+    dma_sync_sg_for_device(&e1->dev, e2, e3, e4)

@@
expression e1, e2;
@@
-    pci_dma_mapping_error(e1, e2)
+    dma_mapping_error(&e1->dev, e2)

@@
expression e1, e2;
@@
-    pci_set_dma_mask(e1, e2)
+    dma_set_mask(&e1->dev, e2)

@@
expression e1, e2;
@@
-    pci_set_consistent_dma_mask(e1, e2)
+    dma_set_coherent_mask(&e1->dev, e2)

Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agolan743x: switch from 'pci_' to 'dma_' API
Christophe JAILLET [Tue, 14 Jul 2020 07:52:24 +0000 (09:52 +0200)]
lan743x: switch from 'pci_' to 'dma_' API

The wrappers in include/linux/pci-dma-compat.h should go away.

The patch has been generated with the coccinelle script below and has been
hand modified to replace GPF_ with a correct flag.
It has been compile tested.

When memory is allocated in 'lan743x_tx_ring_cleanup()' and
'lan743x_rx_ring_init()', GFP_KERNEL can be used because this flag is
already used to allocate some memory in these functions.

While at it, remove a useless (void *) casting in the first hunk in so that
the code is more consistent.

@@
@@
-    PCI_DMA_BIDIRECTIONAL
+    DMA_BIDIRECTIONAL

@@
@@
-    PCI_DMA_TODEVICE
+    DMA_TO_DEVICE

@@
@@
-    PCI_DMA_FROMDEVICE
+    DMA_FROM_DEVICE

@@
@@
-    PCI_DMA_NONE
+    DMA_NONE

@@
expression e1, e2, e3;
@@
-    pci_alloc_consistent(e1, e2, e3)
+    dma_alloc_coherent(&e1->dev, e2, e3, GFP_)

@@
expression e1, e2, e3;
@@
-    pci_zalloc_consistent(e1, e2, e3)
+    dma_alloc_coherent(&e1->dev, e2, e3, GFP_)

@@
expression e1, e2, e3, e4;
@@
-    pci_free_consistent(e1, e2, e3, e4)
+    dma_free_coherent(&e1->dev, e2, e3, e4)

@@
expression e1, e2, e3, e4;
@@
-    pci_map_single(e1, e2, e3, e4)
+    dma_map_single(&e1->dev, e2, e3, e4)

@@
expression e1, e2, e3, e4;
@@
-    pci_unmap_single(e1, e2, e3, e4)
+    dma_unmap_single(&e1->dev, e2, e3, e4)

@@
expression e1, e2, e3, e4, e5;
@@
-    pci_map_page(e1, e2, e3, e4, e5)
+    dma_map_page(&e1->dev, e2, e3, e4, e5)

@@
expression e1, e2, e3, e4;
@@
-    pci_unmap_page(e1, e2, e3, e4)
+    dma_unmap_page(&e1->dev, e2, e3, e4)

@@
expression e1, e2, e3, e4;
@@
-    pci_map_sg(e1, e2, e3, e4)
+    dma_map_sg(&e1->dev, e2, e3, e4)

@@
expression e1, e2, e3, e4;
@@
-    pci_unmap_sg(e1, e2, e3, e4)
+    dma_unmap_sg(&e1->dev, e2, e3, e4)

@@
expression e1, e2, e3, e4;
@@
-    pci_dma_sync_single_for_cpu(e1, e2, e3, e4)
+    dma_sync_single_for_cpu(&e1->dev, e2, e3, e4)

@@
expression e1, e2, e3, e4;
@@
-    pci_dma_sync_single_for_device(e1, e2, e3, e4)
+    dma_sync_single_for_device(&e1->dev, e2, e3, e4)

@@
expression e1, e2, e3, e4;
@@
-    pci_dma_sync_sg_for_cpu(e1, e2, e3, e4)
+    dma_sync_sg_for_cpu(&e1->dev, e2, e3, e4)

@@
expression e1, e2, e3, e4;
@@
-    pci_dma_sync_sg_for_device(e1, e2, e3, e4)
+    dma_sync_sg_for_device(&e1->dev, e2, e3, e4)

@@
expression e1, e2;
@@
-    pci_dma_mapping_error(e1, e2)
+    dma_mapping_error(&e1->dev, e2)

@@
expression e1, e2;
@@
-    pci_set_dma_mask(e1, e2)
+    dma_set_mask(&e1->dev, e2)

@@
expression e1, e2;
@@
-    pci_set_consistent_dma_mask(e1, e2)
+    dma_set_coherent_mask(&e1->dev, e2)

Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoMerge branch 'bridge-mrp-Add-support-for-interconnect-ring'
David S. Miller [Tue, 14 Jul 2020 20:46:43 +0000 (13:46 -0700)]
Merge branch 'bridge-mrp-Add-support-for-interconnect-ring'

Horatiu Vultur says:

====================
bridge: mrp: Add support for interconnect ring

This patch series extends existing MRP to add support for interconnect ring.  An
interconnect ring is a ring that connects 2 rings. In this way is possible to
connect multiple rings. Each interconnect ring is form of 4 nodes, in which 3
have the role MIC(Media Redundancy Interconnect Client) and one has the role
MIM(Media Redundancy Interconnect Manager). All these nodes need to have the
same ID and the ID needs to be unique between multiple interconnect rings. And 2
nodes needs to be part of one ring and the other 2 nodes needs to be part of the
other ring that is connected.

                 +---------+
                 |         |
      +----------|   MRM   |---------------+
      |          |         |               |
      |          +---------+               |
      |                                    |
      |                                    |
      |                                    |
+--------------+                  +-----------------+
|              |                  |                 |
|  MRC/MIC     |------------------|    MRC/MIM      |
|              |                  |                 |
+--------------+                  +-----------------+
      |                                     |
      |Interconnect port                    |Interconnect port
      |                                     |
      |                                     |
+--------------+                  +-----------------+
|              |                  |                 |
|  MRC/MIC     |----------------- |   MRC/MIC       |
|              |                  |                 |
+--------------+                  +-----------------+
      |                                     |
      |                                     |
      |          +---------+                |
      |          |         |                |
      +----------|  MRM    |----------------+
                 |         |
                 +---------+

Each node in a ring needs to have one of the following ring roles, MRM or MRC.
And it can also have an interconnect role like MIM or MIC if it is part of an
interconnect ring. In the figure above the MRM doesn't have any interconnect
role but the MRC from the top ring have the interconnect roles MIC respectively
MIM. Therefore it is not possible for a node to have only an interconnect role.

There are 2 ways for interconnect ring to detect when is open or closed:
1. To use CCM frames on the interconnect port to detect when the interconnect
   link goes down/up. This mode is called LC-mode.
2. To send InTest frames on all 3 ports(2 ring ports and 1 interconnect port)
   and detect when these frames are received back. This mode is called RC-mode.

This patch series adds support only for RC-mode. Where MIM sends InTest frames
on all 3 ports and detects when it receives back the InTest. When it receives
the InTest it means that the ring is closed so it would set the interconnect
port in blocking state. If it stops receiving the InTest frames then it would
set the port in forwarding state and it would send InTopo frames. These InTopo
frames will be received by MRM nodes and process them. And then the MRM will
send Topo frames in the rings so each client will clear its FDB.

v4:
  - always cancel delay work if the MRP instance is deleted or interconnect role
    is disabled but allow only to start to send InTest frames only if the role
    is MIM.

v3:
  - update 'br_mrp_set_in_role' to stop sending test if the role is disabled
    and don't allow to set a different interconnect port if there is already
    one.

v2:
  - rearrange structures not to contain holes
  - stop sending MRP_InTest frames when the MRP instance is deleted
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: bridge: Add port attribute IFLA_BRPORT_MRP_IN_OPEN
Horatiu Vultur [Tue, 14 Jul 2020 07:34:58 +0000 (09:34 +0200)]
net: bridge: Add port attribute IFLA_BRPORT_MRP_IN_OPEN

This patch adds a new port attribute, IFLA_BRPORT_MRP_IN_OPEN, which
allows to notify the userspace when the node lost the contiuity of
MRP_InTest frames.

Signed-off-by: Horatiu Vultur <horatiu.vultur@microchip.com>
Acked-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agobridge: mrp: Extend br_mrp_fill_info
Horatiu Vultur [Tue, 14 Jul 2020 07:34:57 +0000 (09:34 +0200)]
bridge: mrp: Extend br_mrp_fill_info

This patch extends the function br_mrp_fill_info to return also the
status for the interconnect ring.

Signed-off-by: Horatiu Vultur <horatiu.vultur@microchip.com>
Acked-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agobridge: uapi: mrp: Extend MRP_INFO attributes for interconnect status
Horatiu Vultur [Tue, 14 Jul 2020 07:34:56 +0000 (09:34 +0200)]
bridge: uapi: mrp: Extend MRP_INFO attributes for interconnect status

Extend the existing MRP_INFO to return status of MRP interconnect. In
case there is no MRP interconnect on the node then the role will be
disabled so the other attributes can be ignored.

Signed-off-by: Horatiu Vultur <horatiu.vultur@microchip.com>
Acked-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agobridge: mrp: Extend MRP netlink interface for configuring MRP interconnect
Horatiu Vultur [Tue, 14 Jul 2020 07:34:55 +0000 (09:34 +0200)]
bridge: mrp: Extend MRP netlink interface for configuring MRP interconnect

This patch extends the existing MRP netlink interface with the following
attributes: IFLA_BRIDGE_MRP_IN_ROLE, IFLA_BRIDGE_MRP_IN_STATE and
IFLA_BRIDGE_MRP_START_IN_TEST. These attributes are similar with their
ring attributes but they apply to the interconnect port.

Signed-off-by: Horatiu Vultur <horatiu.vultur@microchip.com>
Acked-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agobridge: mrp: Implement the MRP Interconnect API
Horatiu Vultur [Tue, 14 Jul 2020 07:34:54 +0000 (09:34 +0200)]
bridge: mrp: Implement the MRP Interconnect API

Thie patch adds support for MRP Interconnect. Similar with the MRP ring,
if the HW can't generate MRP_InTest frames, then the SW will try to
generate them. And if also the SW fails to generate the frames then an
error is return to userspace.

The forwarding/termination of MRP_In frames is happening in the kernel
and is done by MRP instances.

Signed-off-by: Horatiu Vultur <horatiu.vultur@microchip.com>
Acked-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agobridge: switchdev: mrp: Extend MRP API for switchdev for MRP Interconnect
Horatiu Vultur [Tue, 14 Jul 2020 07:34:53 +0000 (09:34 +0200)]
bridge: switchdev: mrp: Extend MRP API for switchdev for MRP Interconnect

Implement the MRP API for interconnect switchdev. Similar with the other
br_mrp_switchdev function, these function will just eventually call the
switchdev functions: switchdev_port_obj_add/del.

Signed-off-by: Horatiu Vultur <horatiu.vultur@microchip.com>
Acked-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agobridge: mrp: Add br_mrp_in_port_open function
Horatiu Vultur [Tue, 14 Jul 2020 07:34:52 +0000 (09:34 +0200)]
bridge: mrp: Add br_mrp_in_port_open function

This function notifies the userspace when the node lost the continuity
of MRP_InTest frames.

Signed-off-by: Horatiu Vultur <horatiu.vultur@microchip.com>
Acked-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agobridge: mrp: Rename br_mrp_port_open to br_mrp_ring_port_open
Horatiu Vultur [Tue, 14 Jul 2020 07:34:51 +0000 (09:34 +0200)]
bridge: mrp: Rename br_mrp_port_open to br_mrp_ring_port_open

This patch renames the function br_mrp_port_open to
br_mrp_ring_port_open. In this way is more clear that a ring port lost
the continuity because there will be also a br_mrp_in_port_open.

Signed-off-by: Horatiu Vultur <horatiu.vultur@microchip.com>
Acked-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agobridge: mrp: Extend br_mrp for MRP interconnect
Horatiu Vultur [Tue, 14 Jul 2020 07:34:50 +0000 (09:34 +0200)]
bridge: mrp: Extend br_mrp for MRP interconnect

This patch extends the 'struct br_mrp' to contain information regarding
the MRP interconnect. It contains the following:
- the interconnect port 'i_port', which is NULL if the node doesn't have
  a interconnect role
- the interconnect id, which is similar with the ring id, but this field
  is also part of the MRP_InTest frames.
- the interconnect role, which can be MIM or MIC.
- the interconnect state, which can be open or closed.
- the interconnect delayed_work for sending MRP_InTest frames and check
  for lost of continuity.

Signed-off-by: Horatiu Vultur <horatiu.vultur@microchip.com>
Acked-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agobridge: mrp: Extend bridge interface
Horatiu Vultur [Tue, 14 Jul 2020 07:34:49 +0000 (09:34 +0200)]
bridge: mrp: Extend bridge interface

This patch adds a new flag(BR_MRP_LOST_IN_CONT) to the net bridge
ports. This bit will be set when the port lost the continuity of
MRP_InTest frames.

Signed-off-by: Horatiu Vultur <horatiu.vultur@microchip.com>
Acked-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agobridge: uapi: mrp: Extend MRP attributes for MRP interconnect
Horatiu Vultur [Tue, 14 Jul 2020 07:34:48 +0000 (09:34 +0200)]
bridge: uapi: mrp: Extend MRP attributes for MRP interconnect

Extend the existing MRP netlink attributes to allow to configure MRP
Interconnect:

IFLA_BRIDGE_MRP_IN_ROLE - the parameter type is br_mrp_in_role which
  contains the interconnect id, the ring id, the interconnect role(MIM
  or MIC) and the port ifindex that represents the interconnect port.

IFLA_BRIDGE_MRP_IN_STATE - the parameter type is br_mrp_in_state which
  contains the interconnect id and the interconnect state.

IFLA_BRIDGE_MRP_IN_TEST - the parameter type is br_mrp_start_in_test
  which contains the interconnect id, the interval at which to send
  MRP_InTest frames, how many test frames can be missed before declaring
  the interconnect ring open and the period which represents for how long
  to send MRP_InTest frames.

Signed-off-by: Horatiu Vultur <horatiu.vultur@microchip.com>
Acked-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoswitchdev: mrp: Extend switchdev API for MRP Interconnect
Horatiu Vultur [Tue, 14 Jul 2020 07:34:47 +0000 (09:34 +0200)]
switchdev: mrp: Extend switchdev API for MRP Interconnect

Extend switchdev API to add support for MRP interconnect. The HW is
notified in the following cases:

SWITCHDEV_OBJ_ID_IN_ROLE_MRP: This is used when the interconnect role
  of the node changes. The supported roles are MIM and MIC.

SWITCHDEV_OBJ_ID_IN_STATE_MRP: This is used when the interconnect ring
  changes it states to open or closed.

SWITCHDEV_OBJ_ID_IN_TEST_MRP: This is used to start/stop sending
  MRP_InTest frames on all MRP ports. This is called only on nodes that
  have the interconnect role MIM.

Signed-off-by: Horatiu Vultur <horatiu.vultur@microchip.com>
Reviewed-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agobpfilter: Allow to build bpfilter_umh as a module without static library
Masahiro Yamada [Wed, 1 Jul 2020 09:26:44 +0000 (18:26 +0900)]
bpfilter: Allow to build bpfilter_umh as a module without static library

Originally, bpfilter_umh was linked with -static only when
CONFIG_BPFILTER_UMH=y.

Commit 8a2cc0505cc4 ("bpfilter: use 'userprogs' syntax to build
bpfilter_umh") silently, accidentally dropped the CONFIG_BPFILTER_UMH=y
test in the Makefile. Revive it in order to link it dynamically when
CONFIG_BPFILTER_UMH=m.

Since commit b1183b6dca3e ("bpfilter: check if $(CC) can link static
libc in Kconfig"), the compiler must be capable of static linking to
enable CONFIG_BPFILTER_UMH, but it requires more than needed.

To loosen the compiler requirement, I changed the dependency as follows:

    depends on CC_CAN_LINK
    depends on m || CC_CAN_LINK_STATIC

If CONFIG_CC_CAN_LINK_STATIC in unset, CONFIG_BPFILTER_UMH is restricted
to 'm' or 'n'.

In theory, CONFIG_CC_CAN_LINK is not required for CONFIG_BPFILTER_UMH=y,
but I did not come up with a good way to describe it.

Fixes: 8a2cc0505cc4 ("bpfilter: use 'userprogs' syntax to build bpfilter_umh")
Reported-by: Michal Kubecek <mkubecek@suse.cz>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Tested-by: Michal Kubecek <mkubecek@suse.cz>
Link: https://lore.kernel.org/bpf/20200701092644.762234-1-masahiroy@kernel.org