openwrt/staging/blogic.git
4 years agodevlink: report error once U32_MAX snapshot ids have been used
Jacob Keller [Thu, 26 Mar 2020 18:37:14 +0000 (11:37 -0700)]
devlink: report error once U32_MAX snapshot ids have been used

The devlink_snapshot_id_get() function returns a snapshot id. The
snapshot id is a u32, so there is no way to indicate an error code.

A future change is going to possibly add additional cases where this
function could fail. Refactor the function to return the snapshot id in
an argument, so that it can return zero or an error value.

This ensures that snapshot ids cannot be confused with error values, and
aids in the future refactor of snapshot id allocation management.

Because there is no current way to release previously used snapshot ids,
add a simple check ensuring that an error is reported in case the
snapshot_id would over flow.

Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agodevlink: extract snapshot id allocation to helper function
Jacob Keller [Thu, 26 Mar 2020 18:37:13 +0000 (11:37 -0700)]
devlink: extract snapshot id allocation to helper function

A future change is going to implement a new devlink command to request
a snapshot on demand. As part of this, the logic for handling the
snapshot ids will be refactored. To simplify the snapshot id allocation
function, move it to a separate function prefixed by `__`. This helper
function will assume the lock is held.

While no other callers will exist, it simplifies refactoring the logic
because there is no need to complicate the function with gotos to handle
unlocking on failure.

Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agodevlink: use -ENOSPC to indicate no more room for snapshots
Jacob Keller [Thu, 26 Mar 2020 18:37:12 +0000 (11:37 -0700)]
devlink: use -ENOSPC to indicate no more room for snapshots

The devlink_region_snapshot_create function returns -ENOMEM when the
maximum number of snapshots has been reached. This is confusing because
it is not an issue of being out of memory. Change this to use -ENOSPC
instead.

Reported-by: Jiri Pirko <jiri@resnulli.us>
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agodevlink: add function to take snapshot while locked
Jacob Keller [Thu, 26 Mar 2020 18:37:11 +0000 (11:37 -0700)]
devlink: add function to take snapshot while locked

A future change is going to add a new devlink command to request
a snapshot on demand. This function will want to call the
devlink_region_snapshot_create function while already holding the
devlink instance lock.

Extract the logic of this function into a static function prefixed by
`__` to indicate that it is an internal helper function. Modify the
original function to be implemented in terms of the new locked
function.

Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Reviewed-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agodevlink: trivial: fix tab in function documentation
Jacob Keller [Thu, 26 Mar 2020 18:37:10 +0000 (11:37 -0700)]
devlink: trivial: fix tab in function documentation

The function documentation comment for devlink_region_snapshot_create
included a literal tab character between 'future analyses' that was
difficult to spot as it happened to only display as one space wide.

Fix the comment to use a space here instead of a stray tab appearing in
the middle of a sentence.

Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agodevlink: convert snapshot destructor callback to region op
Jacob Keller [Thu, 26 Mar 2020 18:37:09 +0000 (11:37 -0700)]
devlink: convert snapshot destructor callback to region op

It does not makes sense that two snapshots for a given region would use
different destructors. Simplify snapshot creation by adding
a .destructor op for regions.

This operation will replace the data_destructor for the snapshot
creation, and makes snapshot creation easier.

Noticed-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agodevlink: prepare to support region operations
Jacob Keller [Thu, 26 Mar 2020 18:37:08 +0000 (11:37 -0700)]
devlink: prepare to support region operations

Modify the devlink region code in preparation for adding new operations
on regions.

Create a devlink_region_ops structure, and move the name pointer from
within the devlink_region structure into the ops structure (similar to
the devlink_health_reporter_ops).

This prepares the regions to enable support of additional operations in
the future such as requesting snapshots, or accessing the region
directly without a snapshot.

In order to re-use the constant strings in the mlx4 driver their
declaration must be changed to 'const char * const' to ensure the
compiler realizes that both the data and the pointer cannot change.

Signed-off-by: Jacob Keller <jacob.e.keller@intel.com>
Reviewed-by: Jakub Kicinski <kuba@kernel.org>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoMerge branch 'veth-stats'
David S. Miller [Fri, 27 Mar 2020 02:35:13 +0000 (19:35 -0700)]
Merge branch 'veth-stats'

Lorenzo Bianconi says:

====================
veth: move ndo_xdp_xmit stats to peer veth_rq

Move ndo_xdp_xmit ethtool stats accounting to peer veth_rq.
Move XDP_TX accounting to veth_xdp_flush_bq routine.

Changes since v1:
- rename xdp_xmit[_err] counters to peer_tq_xdp_xmit[_err]
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoveth: rely on peer veth_rq for ndo_xdp_xmit accounting
Lorenzo Bianconi [Thu, 26 Mar 2020 22:10:20 +0000 (23:10 +0100)]
veth: rely on peer veth_rq for ndo_xdp_xmit accounting

Rely on 'remote' veth_rq to account ndo_xdp_xmit ethtool counters.
Move XDP_TX accounting to veth_xdp_flush_bq routine.
Remove 'rx' prefix in rx xdp ethool counters

Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Acked-by: Toshiaki Makita <toshiaki.makita1@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoveth: rely on veth_rq in veth_xdp_flush_bq signature
Lorenzo Bianconi [Thu, 26 Mar 2020 22:10:19 +0000 (23:10 +0100)]
veth: rely on veth_rq in veth_xdp_flush_bq signature

Substitute net_device point with veth_rq one in veth_xdp_flush_bq,
veth_xdp_flush and veth_xdp_tx signature. This is a preliminary patch
to account xdp_xmit counter on 'receiving' veth_rq

Acked-by: Toshiaki Makita <toshiaki.makita1@gmail.com>
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agosfc: falcon: convert to use i2c_new_client_device()
Wolfram Sang [Thu, 26 Mar 2020 21:10:00 +0000 (22:10 +0100)]
sfc: falcon: convert to use i2c_new_client_device()

Move away from the deprecated API and return the shiny new ERRPTR where
useful.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoigb: convert to use i2c_new_client_device()
Wolfram Sang [Thu, 26 Mar 2020 21:09:59 +0000 (22:09 +0100)]
igb: convert to use i2c_new_client_device()

Move away from the deprecated API and return the shiny new ERRPTR where
useful.

Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoMerge branch 'Implement-stats_update-callback-for-pedit-and-skbedit'
David S. Miller [Fri, 27 Mar 2020 02:20:37 +0000 (19:20 -0700)]
Merge branch 'Implement-stats_update-callback-for-pedit-and-skbedit'

Petr Machata says:

====================
Implement stats_update callback for pedit and skbedit

The stats_update callback is used for adding HW counters to the SW ones.
Both skbedit and pedit actions are actually recognized by flow_offload.h,
but do not implement these callbacks. As a consequence, the reported values
are only the SW ones, even where there is a HW counter available.

Patch #1 adds the callback to action skbedit, patch #2 adds it to action
pedit. Patch #3 tweaks an skbedit selftest with a check that would have
caught this problem.

The pedit test is not likewise tweaked, because the iproute2 pedit action
currently does not support JSON dumping. This will be addressed later.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoselftests: skbedit_priority: Test counters at the skbedit rule
Petr Machata [Thu, 26 Mar 2020 20:45:57 +0000 (22:45 +0200)]
selftests: skbedit_priority: Test counters at the skbedit rule

Currently the test checks the observable effect of skbedit priority:
queueing of packets at the correct qdisc band. It therefore misses the fact
that the counters for offloaded rules are not updated. Add an extra check
for the counter.

Signed-off-by: Petr Machata <petrm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agosched: act_pedit: Implement stats_update callback
Petr Machata [Thu, 26 Mar 2020 20:45:56 +0000 (22:45 +0200)]
sched: act_pedit: Implement stats_update callback

Implement this callback in order to get the offloaded stats added to the
kernel stats.

Reported-by: Alexander Petrovskiy <alexpe@mellanox.com>
Signed-off-by: Petr Machata <petrm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agosched: act_skbedit: Implement stats_update callback
Petr Machata [Thu, 26 Mar 2020 20:45:55 +0000 (22:45 +0200)]
sched: act_skbedit: Implement stats_update callback

Implement this callback in order to get the offloaded stats added to the
kernel stats.

Reported-by: Alexander Petrovskiy <alexpe@mellanox.com>
Signed-off-by: Petr Machata <petrm@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoMerge branch 'mlxsw-Offload-TC-action-pedit-munge-dsfield'
David S. Miller [Thu, 26 Mar 2020 18:55:41 +0000 (11:55 -0700)]
Merge branch 'mlxsw-Offload-TC-action-pedit-munge-dsfield'

Ido Schimmel says:

====================
mlxsw: Offload TC action pedit munge dsfield

Petr says:

The Spectrum switches allow packet prioritization based on DSCP on ingress,
and update of DSCP on egress. This is configured through the DCB APP rules.
For some use cases, assigning a custom DSCP value based on an ACL match is
a better tool. To that end, offload FLOW_ACTION_MANGLE to permit changing
of dsfield as a whole, or DSCP and ECN values in isolation.

After fixing a commentary nit in patch #1, and mlxsw naming in patch #2,
patches #3 and #4 add the offload to mlxsw.

Patch #5 adds a forwarding selftest for pedit dsfield, applicable to SW as
well as HW datapaths. Patch #6 adds a mlxsw-specific test to verify DSCP
rewrite due to DCB APP rules is not performed on pedited packets.

The tests only cover IPv4 dsfield setting. We have tests for IPv6 as well,
but would like to postpone their contribution until the corresponding
iproute patches have been accepted.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoselftests: mlxsw: qos_dscp_router: Test no DSCP rewrite after pedit
Petr Machata [Thu, 26 Mar 2020 14:01:14 +0000 (16:01 +0200)]
selftests: mlxsw: qos_dscp_router: Test no DSCP rewrite after pedit

When DSCP is updated through an offloaded pedit action, DSCP rewrite on
egress should be disabled. Add a test that check that it is so.

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 agoselftests: forwarding: Add a forwarding test for pedit munge dsfield
Petr Machata [Thu, 26 Mar 2020 14:01:13 +0000 (16:01 +0200)]
selftests: forwarding: Add a forwarding test for pedit munge dsfield

Add a test that runs packets with dsfield set, and test that pedit adjusts
the DSCP or ECN parts or the whole field.

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_flower: Offload FLOW_ACTION_MANGLE
Petr Machata [Thu, 26 Mar 2020 14:01:12 +0000 (16:01 +0200)]
mlxsw: spectrum_flower: Offload FLOW_ACTION_MANGLE

Offload action pedit ex munge when used with a flower classifier. Only
allow setting of DSCP, ECN, or the whole DSField in IPv4 and IPv6 packets.

Signed-off-by: Petr Machata <petrm@mellanox.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agomlxsw: core: Add DSCP, ECN, dscp_rw to QOS_ACTION
Petr Machata [Thu, 26 Mar 2020 14:01:11 +0000 (16:01 +0200)]
mlxsw: core: Add DSCP, ECN, dscp_rw to QOS_ACTION

The QOS_ACTION is used for manipulating the QOS attributes of the packet.
Add the defines and helpers related to DSCP and ECN fields, and dscp_rw.

Signed-off-by: Petr Machata <petrm@mellanox.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agomlxsw: core: Rename mlxsw_afa_qos_cmd to mlxsw_afa_qos_switch_prio_cmd
Petr Machata [Thu, 26 Mar 2020 14:01:10 +0000 (16:01 +0200)]
mlxsw: core: Rename mlxsw_afa_qos_cmd to mlxsw_afa_qos_switch_prio_cmd

The original idea was to reuse this set of actions for ECN rewrite as well,
but on second look, it's not such a great idea. These two items should each
have its own command. Rename the existing enum to make it obvious that it
belongs to switch_prio_cmd.

Signed-off-by: Petr Machata <petrm@mellanox.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: flow_offload.h: Fix a comment at flow_action_entry.mangle
Petr Machata [Thu, 26 Mar 2020 14:01:09 +0000 (16:01 +0200)]
net: flow_offload.h: Fix a comment at flow_action_entry.mangle

This field references FLOW_ACTION_PACKET_EDIT. Such action does not exist
though. Instead the field is used for FLOW_ACTION_MANGLE and _ADD.

Signed-off-by: Petr Machata <petrm@mellanox.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoMerge tag 'mlx5-updates-2020-03-25' of git://git.kernel.org/pub/scm/linux/kernel...
David S. Miller [Thu, 26 Mar 2020 18:38:48 +0000 (11:38 -0700)]
Merge tag 'mlx5-updates-2020-03-25' of git://git./linux/kernel/git/saeed/linux

Saeed Mahameed says:

====================
mlx5-updates-2020-03-25

1) Cleanups from Dan Carpenter and wenxu.

2) Paul and Roi, Some minor updates and fixes to E-Switch to address
issues introduced in the previous reg_c0 updates series.

3) Eli Cohen simplifies and improves flow steering matching group searches
and flow table entries version management.

4) Parav Pandit, improves devlink eswitch mode changes thread safety.
By making devlink rely on driver for thread safety and introducing mlx5
eswitch mode change protection.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoatl2: remove unused variable 'atl2_driver_string'
YueHaibing [Thu, 26 Mar 2020 03:21:50 +0000 (11:21 +0800)]
atl2: remove unused variable 'atl2_driver_string'

drivers/net/ethernet/atheros/atlx/atl2.c:40:19: warning: ‘atl2_driver_string’ defined but not used [-Wunused-const-variable=]
 static const char atl2_driver_string[] = "Atheros(R) L2 Ethernet Driver";
                   ^~~~~~~~~~~~~~~~~~

commit ea973742140b ("net/atheros: Clean atheros code from driver version")
left behind this, remove it.

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agotipc: Add a missing case of TIPC_DIRECT_MSG type
Hoang Le [Thu, 26 Mar 2020 02:50:29 +0000 (09:50 +0700)]
tipc: Add a missing case of TIPC_DIRECT_MSG type

In the commit f73b12812a3d
("tipc: improve throughput between nodes in netns"), we're missing a check
to handle TIPC_DIRECT_MSG type, it's still using old sending mechanism for
this message type. So, throughput improvement is not significant as
expected.

Besides that, when sending a large message with that type, we're also
handle wrong receiving queue, it should be enqueued in socket receiving
instead of multicast messages.

Fix this by adding the missing case for TIPC_DIRECT_MSG.

Fixes: f73b12812a3d ("tipc: improve throughput between nodes in netns")
Reported-by: Tuong Lien <tuong.t.lien@dektech.com.au>
Signed-off-by: Hoang Le <hoang.h.le@dektech.com.au>
Acked-by: Jon Maloy <jmaloy@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet/mlx5: E-switch, Protect eswitch mode changes
Parav Pandit [Wed, 18 Dec 2019 08:51:19 +0000 (02:51 -0600)]
net/mlx5: E-switch, Protect eswitch mode changes

Currently eswitch mode change is occurring from 2 different execution
contexts as below.
1. sriov sysfs enable/disable
2. devlink eswitch set commands

Both of them need to access eswitch related data structures in
synchronized manner.
Without any synchronization below race condition exist.

SR-IOV enable/disable with devlink eswitch mode change:

          cpu-0                         cpu-1
          -----                         -----
mlx5_device_disable_sriov()        mlx5_devlink_eswitch_mode_set()
  mlx5_eswitch_disable()             esw_offloads_stop()
    esw_offloads_disable()             mlx5_eswitch_disable()
                                         esw_offloads_disable()

Hence, they are synchronized using a new mode_lock.
eswitch's state_lock is not used as it can lead to a deadlock scenario
below and state_lock is only for vport and fdb exclusive access.

ip link set vf <param>
  netlink rcv_msg() - Lock A
    rtnl_lock
    vfinfo()
      esw->state_lock() - Lock B
devlink eswitch_set
   devlink_mutex
     esw->state_lock() - Lock B
       attach_netdev()
         register_netdev()
           rtnl_lock - Lock A

Alternatives considered:
1. Acquiring rtnl lock before taking esw->state_lock to follow similar
locking sequence as ip link flow during eswitch mode set.
rtnl lock is not good idea for two reasons.
(a) Holding rtnl lock for several hundred device commands is not good
    idea.
(b) It leads to below and more similar deadlocks.

devlink eswitch_set
   devlink_mutex
     rtnl_lock - Lock A
       esw->state_lock() - Lock B
         eswitch_disable()
           reload()
             ib_register_device()
               ib_cache_setup_one()
                 rtnl_lock()

2. Exporting devlink lock may lead to undesired use of it in vendor
driver(s) in future.

3. Unloading representors outside of the mode_lock requires
serialization with other process trying to enable the eswitch.

4. Differing the representors life cycle to a different workqueue
requires synchronization with func_change_handler workqueue.

Reviewed-by: Roi Dayan <roid@mellanox.com>
Reviewed-by: Bodong Wang <bodong@mellanox.com>
Reviewed-by: Mark Bloch <markb@mellanox.com>
Signed-off-by: Parav Pandit <parav@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
4 years agonet/mlx5: E-switch, Extend eswitch enable to handle num_vfs change
Parav Pandit [Wed, 18 Dec 2019 10:58:58 +0000 (04:58 -0600)]
net/mlx5: E-switch, Extend eswitch enable to handle num_vfs change

Subsequent patch protects eswitch mode changes across sriov and devlink
interfaces. It is desirable for eswitch to provide thread safe eswitch
enable and disable APIs.
Hence, extend eswitch enable API to optionally update num_vfs when
requested.

In subsequent patch, eswitch num_vfs are updated after all the eswitch
users eswitch drops its reference count.

Reviewed-by: Roi Dayan <roid@mellanox.com>
Reviewed-by: Bodong Wang <bodong@mellanox.com>
Reviewed-by: Mark Bloch <markb@mellanox.com>
Signed-off-by: Parav Pandit <parav@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
4 years agonet/mlx5: Split eswitch mode check to different helper function
Parav Pandit [Sat, 14 Dec 2019 10:09:04 +0000 (04:09 -0600)]
net/mlx5: Split eswitch mode check to different helper function

In order to check eswitch state under a lock, prepare code to split
capability check and eswitch state check into two helper functions.

Reviewed-by: Roi Dayan <roid@mellanox.com>
Reviewed-by: Bodong Wang <bodong@mellanox.com>
Reviewed-by: Mark Bloch <markb@mellanox.com>
Signed-off-by: Parav Pandit <parav@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
4 years agodevlink: Rely on driver eswitch thread safety instead of devlink
Parav Pandit [Mon, 24 Feb 2020 01:06:56 +0000 (19:06 -0600)]
devlink: Rely on driver eswitch thread safety instead of devlink

devlink_nl_cmd_eswitch_set_doit() doesn't hold devlink->lock mutex while
invoking driver callback. This is likely due to eswitch mode setting
involves adding/remove devlink ports, health reporters or
other devlink objects for a devlink device.

So it is driver responsiblity to ensure thread safe eswitch state
transition happening via either sriov legacy enablement or via devlink
eswitch set callback.

Therefore, get() callback should also be invoked without holding
devlink->lock mutex.
Vendor driver can use same internal lock which it uses during eswitch
mode set() callback.
This makes get() and set() implimentation symmetric in devlink core and
in vendor drivers.

Hence, remove holding devlink->lock mutex during eswitch get() callback.

Failing to do so results into below deadlock scenario when mlx5_core
driver is improved to handle eswitch mode set critical section invoked
by devlink and sriov sysfs interface in subsequent patch.

devlink_nl_cmd_eswitch_set_doit()
   mlx5_eswitch_mode_set()
     mutex_lock(esw->mode_lock) <- Lock A
     [...]
     register_devlink_port()
       mutex_lock(&devlink->lock); <- lock B

mutex_lock(&devlink->lock); <- lock B
devlink_nl_cmd_eswitch_get_doit()
   mlx5_eswitch_mode_get()
   mutex_lock(esw->mode_lock) <- Lock A

In subsequent patch, mlx5_core driver uses its internal lock during
get() and set() eswitch callbacks.

Other drivers have been inspected which returns either constant during
get operations or reads the value from already allocated structure.
Hence it is safe to remove the lock in get( ) callback and let vendor
driver handle it.

Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Reviewed-by: Mark Bloch <markb@mellanox.com>
Signed-off-by: Parav Pandit <parav@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
4 years agonet/mlx5: Simplify mlx5_unload_one() and its callers
Parav Pandit [Mon, 9 Mar 2020 04:17:37 +0000 (23:17 -0500)]
net/mlx5: Simplify mlx5_unload_one() and its callers

mlx5_unload_one() always returns 0.
Simplify callers of mlx5_unload_one() and remove the dead code.

Reviewed-by: Moshe Shemesh <moshe@mellanox.com>
Signed-off-by: Parav Pandit <parav@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
4 years agonet/mlx5: Simplify mlx5_register_device to return void
Parav Pandit [Mon, 9 Mar 2020 03:19:51 +0000 (22:19 -0500)]
net/mlx5: Simplify mlx5_register_device to return void

mlx5_register_device() doesn't check for any error and always returns 0.
Simplify mlx5_register_device() to return void and its caller, remove
dead code related to it.

Reviewed-by: Moshe Shemesh <moshe@mellanox.com>
Signed-off-by: Parav Pandit <parav@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
4 years agonet/mlx5: Avoid group version scan when not necessary
Eli Cohen [Wed, 4 Mar 2020 08:32:56 +0000 (10:32 +0200)]
net/mlx5: Avoid group version scan when not necessary

Group version is used when modifying a rule is allowed
(FLOW_ACT_NO_APPEND is clear) to detect a case where the rule was found
but while the groups where unlocked a new FTE was added. In this case,
the added FTE could be one with identical match value so we need to
attempt again with group lock held.

Change the code so version is retrieved only when FLOW_ACT_NO_APPEND is
cleared. As result, later compare can also be avoided if FLOW_ACT_NO_APPEND
is cleared.

Also improve comments text.

Signed-off-by: Eli Cohen <eli@mellanox.com>
Reviewed-by: Mark Bloch <markb@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
4 years agonet/mlx5: Avoid incrementing FTE version
Eli Cohen [Wed, 4 Mar 2020 08:32:56 +0000 (10:32 +0200)]
net/mlx5: Avoid incrementing FTE version

FTE version is not used anywhere in the code so avoid incrementing it.

Signed-off-by: Eli Cohen <eli@mellanox.com>
Reviewed-by: Mark Bloch <markb@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
4 years agonet/mlx5: Fix group version management
Eli Cohen [Wed, 4 Mar 2020 08:32:56 +0000 (10:32 +0200)]
net/mlx5: Fix group version management

When adding a rule to a flow group we need increment the version of the
group. Current code fails to do that and as a result, when trying to add
a rule, we will fail to discover a case where an FTE with the same match
value was added while we scanned the groups of the same match criteria,
thus we may try to add an FTE that was already added.

Signed-off-by: Eli Cohen <eli@mellanox.com>
Reviewed-by: Mark Bloch <markb@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
4 years agonet/mlx5: Simplify matching group searches
Eli Cohen [Wed, 26 Feb 2020 13:03:16 +0000 (15:03 +0200)]
net/mlx5: Simplify matching group searches

Instead of using two different structs for searching groups with the
same match, use a single struct and thus simplify the code, make it more
readable and smaller size which means less code cache misses.

         text    data     bss     dec     hex
before: 35524    2744       0   38268    957c
after:  35038    2744       0   37782    9396

When testing add 70000 rules, delete all the rules, and repeat three
times taking the average, we get (time in seconds):

Before the change: insert 16.80, delete 11.02
After the change:  insert 16.55, delete 10.95

Signed-off-by: Eli Cohen <eli@mellanox.com>
Reviewed-by: Mark Bloch <markb@mellanox.com>
Reviewed-by: Maor Gottlieb <maorg@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
4 years agonet/mlx5: E-Switch, Use correct type for chain, prio and level values
Roi Dayan [Mon, 23 Mar 2020 10:14:58 +0000 (12:14 +0200)]
net/mlx5: E-Switch, Use correct type for chain, prio and level values

The correct type is u32.

Fixes: d18296ffd9cc ("net/mlx5: E-Switch, Introduce global tables")
Signed-off-by: Roi Dayan <roid@mellanox.com>
Reviewed-by: Paul Blakey <paulb@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
4 years agonet/mlx5: E-Switch, free flow_group_in after creating the restore table
Roi Dayan [Thu, 19 Mar 2020 15:48:18 +0000 (17:48 +0200)]
net/mlx5: E-Switch, free flow_group_in after creating the restore table

We allocate a temporary memory but forget to free it.

Fixes: 11b717d61526 ("net/mlx5: E-Switch, Get reg_c0 value on CQE")
Signed-off-by: Roi Dayan <roid@mellanox.com>
Reviewed-by: Paul Blakey <paulb@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
4 years agonet/mlx5: E-Switch, Enable chains only if regs loopback is enabled
Paul Blakey [Wed, 18 Mar 2020 09:43:06 +0000 (11:43 +0200)]
net/mlx5: E-Switch, Enable chains only if regs loopback is enabled

Register c0 loopback is needed to fully support chains and prios.

Enable chains and prio only if loopback (of reg c1 which came together
with c0), is enabled. To be able to check that, move enabling of loopback
before eswitch chains init.

Signed-off-by: Paul Blakey <paulb@mellanox.com>
Reviewed-by: Roi Dayan <roid@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
4 years agonet/mlx5: E-Switch, Enable restore table only if reg_c1 is supported
Paul Blakey [Wed, 18 Mar 2020 08:55:12 +0000 (10:55 +0200)]
net/mlx5: E-Switch, Enable restore table only if reg_c1 is supported

Reg c0/c1 matching, rewrite of regs c0/c1, and copy header of regs c1,B
is needed for the restore table to function, might not be supported by
firmware, and creation of the restore table or the copy header will
fail.

Check reg_c1 loopback support, as firmware which supports this,
should have all of the above.

Fixes: 11b717d61526 ("net/mlx5: E-Switch, Get reg_c0 value on CQE")
Signed-off-by: Paul Blakey <paulb@mellanox.com>
Reviewed-by: Roi Dayan <roid@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
4 years agonet/mlx5e: remove duplicated check chain_index in mlx5e_rep_setup_ft_cb
wenxu [Wed, 18 Mar 2020 09:05:43 +0000 (17:05 +0800)]
net/mlx5e: remove duplicated check chain_index in mlx5e_rep_setup_ft_cb

The function mlx5e_rep_setup_ft_cb check chain_index is zero twice.

Signed-off-by: wenxu <wenxu@ucloud.cn>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
4 years agonet/mlx5e: Fix actions_match_supported() return
Dan Carpenter [Fri, 20 Mar 2020 13:23:05 +0000 (16:23 +0300)]
net/mlx5e: Fix actions_match_supported() return

The actions_match_supported() function returns a bool, true for success
and false for failure.  This error path is returning a negative which
is cast to true but it should return false.

Fixes: 4c3844d9e97e ("net/mlx5e: CT: Introduce connection tracking")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
4 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
David S. Miller [Thu, 26 Mar 2020 01:58:11 +0000 (18:58 -0700)]
Merge git://git./linux/kernel/git/netdev/net

Overlapping header include additions in macsec.c

A bug fix in 'net' overlapping with the removal of 'version'
string in ena_netdev.c

Overlapping test additions in selftests Makefile

Overlapping PCI ID table adjustments in iwlwifi driver.

Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
Linus Torvalds [Wed, 25 Mar 2020 20:58:05 +0000 (13:58 -0700)]
Merge git://git./linux/kernel/git/netdev/net

Pull networking fixes from David Miller:

 1) Fix deadlock in bpf_send_signal() from Yonghong Song.

 2) Fix off by one in kTLS offload of mlx5, from Tariq Toukan.

 3) Add missing locking in iwlwifi mvm code, from Avraham Stern.

 4) Fix MSG_WAITALL handling in rxrpc, from David Howells.

 5) Need to hold RTNL mutex in tcindex_partial_destroy_work(), from Cong
    Wang.

 6) Fix producer race condition in AF_PACKET, from Willem de Bruijn.

 7) cls_route removes the wrong filter during change operations, from
    Cong Wang.

 8) Reject unrecognized request flags in ethtool netlink code, from
    Michal Kubecek.

 9) Need to keep MAC in reset until PHY is up in bcmgenet driver, from
    Doug Berger.

10) Don't leak ct zone template in act_ct during replace, from Paul
    Blakey.

11) Fix flushing of offloaded netfilter flowtable flows, also from Paul
    Blakey.

12) Fix throughput drop during tx backpressure in cxgb4, from Rahul
    Lakkireddy.

13) Don't let a non-NULL skb->dev leave the TCP stack, from Eric
    Dumazet.

14) TCP_QUEUE_SEQ socket option has to update tp->copied_seq as well,
    also from Eric Dumazet.

15) Restrict macsec to ethernet devices, from Willem de Bruijn.

16) Fix reference leak in some ethtool *_SET handlers, from Michal
    Kubecek.

17) Fix accidental disabling of MSI for some r8169 chips, from Heiner
    Kallweit.

* git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (138 commits)
  net: Fix CONFIG_NET_CLS_ACT=n and CONFIG_NFT_FWD_NETDEV={y, m} build
  net: ena: Add PCI shutdown handler to allow safe kexec
  selftests/net/forwarding: define libs as TEST_PROGS_EXTENDED
  selftests/net: add missing tests to Makefile
  r8169: re-enable MSI on RTL8168c
  net: phy: mdio-bcm-unimac: Fix clock handling
  cxgb4/ptp: pass the sign of offset delta in FW CMD
  net: dsa: tag_8021q: replace dsa_8021q_remove_header with __skb_vlan_pop
  net: cbs: Fix software cbs to consider packet sending time
  net/mlx5e: Do not recover from a non-fatal syndrome
  net/mlx5e: Fix ICOSQ recovery flow with Striding RQ
  net/mlx5e: Fix missing reset of SW metadata in Striding RQ reset
  net/mlx5e: Enhance ICOSQ WQE info fields
  net/mlx5_core: Set IB capability mask1 to fix ib_srpt connection failure
  selftests: netfilter: add nfqueue test case
  netfilter: nft_fwd_netdev: allow to redirect to ifb via ingress
  netfilter: nft_fwd_netdev: validate family and chain type
  netfilter: nft_set_rbtree: Detect partial overlaps on insertion
  netfilter: nft_set_rbtree: Introduce and use nft_rbtree_interval_start()
  netfilter: nft_set_pipapo: Separate partial and complete overlap cases on insertion
  ...

4 years agoMerge tag 'gpio-v5.6-3' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux...
Linus Torvalds [Wed, 25 Mar 2020 20:52:36 +0000 (13:52 -0700)]
Merge tag 'gpio-v5.6-3' of git://git./linux/kernel/git/linusw/linux-gpio

Pull GPIO fixes from Linus Walleij:

 - One core quirk by myself to fix the .irq_disable() semantics when the
   gpiolib core takes over this callback.

 - The rest is an elaborate series of four patches fixing Intel laptop
   ACPI wakeup quirks.

* tag 'gpio-v5.6-3' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio:
  gpiolib: acpi: Add quirk to ignore EC wakeups on HP x2 10 CHT + AXP288 model
  gpiolib: acpi: Add quirk to ignore EC wakeups on HP x2 10 BYT + AXP288 model
  gpiolib: acpi: Rework honor_wakeup option into an ignore_wake option
  gpiolib: acpi: Correct comment for HP x2 10 honor_wakeup quirk
  gpiolib: Fix irq_disable() semantics

4 years agoMerge tag 'wireless-drivers-2020-03-25' of git://git.kernel.org/pub/scm/linux/kernel...
David S. Miller [Wed, 25 Mar 2020 20:12:26 +0000 (13:12 -0700)]
Merge tag 'wireless-drivers-2020-03-25' of git://git./linux/kernel/git/kvalo/wireless-drivers

Kalle Valo says:

====================
wireless-drivers fixes for v5.6

Fourth, and last, set of fixes for v5.6. Just two important fixes to
iwlwifi regressions.

iwlwifi

* fix GEO_TX_POWER_LIMIT command on certain devices which caused
  firmware to crash during initialisation

* add back device ids for three devices which were accidentally
  removed
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: Fix CONFIG_NET_CLS_ACT=n and CONFIG_NFT_FWD_NETDEV={y, m} build
Pablo Neira Ayuso [Wed, 25 Mar 2020 12:47:18 +0000 (13:47 +0100)]
net: Fix CONFIG_NET_CLS_ACT=n and CONFIG_NFT_FWD_NETDEV={y, m} build

net/netfilter/nft_fwd_netdev.c: In function ‘nft_fwd_netdev_eval’:
    net/netfilter/nft_fwd_netdev.c:32:10: error: ‘struct sk_buff’ has no member named ‘tc_redirected’
      pkt->skb->tc_redirected = 1;
              ^~
    net/netfilter/nft_fwd_netdev.c:33:10: error: ‘struct sk_buff’ has no member named ‘tc_from_ingress’
      pkt->skb->tc_from_ingress = 1;
              ^~

To avoid a direct dependency with tc actions from netfilter, wrap the
redirect bits around CONFIG_NET_REDIRECT and move helpers to
include/linux/skbuff.h. Turn on this toggle from the ifb driver, the
only existing client of these bits in the tree.

This patch adds skb_set_redirected() that sets on the redirected bit
on the skbuff, it specifies if the packet was redirect from ingress
and resets the timestamp (timestamp reset was originally missing in the
netfilter bugfix).

Fixes: bcfabee1afd99484 ("netfilter: nft_fwd_netdev: allow to redirect to ifb via ingress")
Reported-by: noreply@ellerman.id.au
Reported-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agocxgb4: Add support to catch bits set in INT_CAUSE5
Rahul Kundu [Wed, 25 Mar 2020 11:53:09 +0000 (04:53 -0700)]
cxgb4: Add support to catch bits set in INT_CAUSE5

This commit adds support to catch any bits set in SGE_INT_CAUSE5 for Parity Errors.
F_ERR_T_RXCRC flag is used to ignore that particular bit as it is not considered as fatal.
So, we clear out the bit before looking for error.
This patch now read and report separately all three registers(Cause1, Cause2, Cause5).
Also, checks for errors if any.

Signed-off-by: Raju Rangoju <rajur@chelsio.com>
Signed-off-by: Rahul Kundu <rahul.kundu@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoMerge branch 'octeontx2-pf-Miscellaneous-fixes'
David S. Miller [Wed, 25 Mar 2020 19:20:00 +0000 (12:20 -0700)]
Merge branch 'octeontx2-pf-Miscellaneous-fixes'

Sunil Goutham says:

====================
octeontx2-pf: Miscellaneous fixes

This patchset fixes couple of issues related to missing
page refcount updation and taking a mutex lock in atomic
context.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoocteontx2-pf: Fix ndo_set_rx_mode
Sunil Goutham [Wed, 25 Mar 2020 11:41:17 +0000 (17:11 +0530)]
octeontx2-pf: Fix ndo_set_rx_mode

Since set_rx_mode takes a mutex lock for sending mailbox
message to admin function to set the mode, moved logic
to a workqueue.

Signed-off-by: Sunil Goutham <sgoutham@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoocteontx2-pf: Fix rx buffer page refcount
Sunil Goutham [Wed, 25 Mar 2020 11:41:16 +0000 (17:11 +0530)]
octeontx2-pf: Fix rx buffer page refcount

Fixed an issue wherein while refilling receive buffers
for the last page allocated, recount is not being updated.

Signed-off-by: Sunil Goutham <sgoutham@marvell.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoMerge branch 's390-next'
David S. Miller [Wed, 25 Mar 2020 19:07:16 +0000 (12:07 -0700)]
Merge branch 's390-next'

Julian Wiedmann says:

====================
s390/qeth: updates 2020-03-25

please apply the following patch series for qeth to netdev's net-next
tree.
Same series as yesterday, with one minor update to patch 1 as per
your review.

This adds
1) NAPI poll support for the async-Completion Queue (with one qdio layer
   patch acked by Heiko),
2) ethtool support for per-queue TX IRQ coalescing,
3) various cleanups.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agos390/qeth: modernize two list helpers
Julian Wiedmann [Wed, 25 Mar 2020 09:35:07 +0000 (10:35 +0100)]
s390/qeth: modernize two list helpers

Replace list_for_each() with list_for_each_entry(), and
list_entry(head.next) with list_first_entry().

Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agos390/qeth: keep track of fixed prio-queue configuration
Julian Wiedmann [Wed, 25 Mar 2020 09:35:06 +0000 (10:35 +0100)]
s390/qeth: keep track of fixed prio-queue configuration

When a device is configured in prio-queue mode to pin all traffic onto
a specific HW queue, treat this as a distinct variant of prio-queueing
instead of QETH_NO_PRIO_QUEUEING.

This corrects an error message from qeth_osa_set_output_queues() for
devices configured in such a mode.

Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agos390/qeth: fine-tune MAC Address-related errnos
Julian Wiedmann [Wed, 25 Mar 2020 09:35:05 +0000 (10:35 +0100)]
s390/qeth: fine-tune MAC Address-related errnos

Return the correct errnos when .ndo_set_mac_address fails to set a new
MAC address.

Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agos390/qeth: add TX IRQ coalescing support for IQD devices
Julian Wiedmann [Wed, 25 Mar 2020 09:35:04 +0000 (10:35 +0100)]
s390/qeth: add TX IRQ coalescing support for IQD devices

Since IQD devices complete (most of) their transmissions synchronously,
they don't offer TX completion IRQs and have no HW coalescing controls.
But we can fake the easy parts in SW, and give the user some control wrt
to how often the TX NAPI code should be triggered to process the TX
completions.

Having per-queue controls can in particular help the dedicated mcast
queue, as it likely benefits from different fine-tuning than what the
ucast queues need.

CC: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agos390/qeth: collect more TX statistics
Julian Wiedmann [Wed, 25 Mar 2020 09:35:03 +0000 (10:35 +0100)]
s390/qeth: collect more TX statistics

Count the number of TX doorbells we issue to the qdio layer.

Also count the number of actual frames in a TX buffer, and then
use this data along with the byte count during TX completion.
We'll make additional use of the frame count in a subsequent patch.

Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agos390/qeth: clean up the mac_bits
Julian Wiedmann [Wed, 25 Mar 2020 09:35:02 +0000 (10:35 +0100)]
s390/qeth: clean up the mac_bits

We're down to a single bit flag for MAC-address related status, reflect
that in the info struct.
Also set up the flag during initialization instead of clearing it during
shutdown - one more little step towards unifying the shutdown code.

Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agos390/qeth: simplify L3 dev_id logic
Julian Wiedmann [Wed, 25 Mar 2020 09:35:01 +0000 (10:35 +0100)]
s390/qeth: simplify L3 dev_id logic

The logic that deals with errors from qeth_l3_get_unique_id() is quite
complex: it sets card->unique_id to 0xfffe, additionally flags it as
UNIQUE_ID_NOT_BY_CARD and later takes this flag as cue to not propagate
card->unique_id to dev->dev_id. With dev->dev_id thus holding 0,
addrconf_ifid_eui48() applies its default behaviour.

Get rid of all the special bit masks, and just return the old uid in
case of an error. For the vast majority of cases this will be 0 (and so
we still get the desired default behaviour) - with the rare exception
where qeth_l3_get_unique_id() might have been called earlier but the
initialization then failed at a later point.

Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agos390/qdio: extend polling support to multiple queues
Julian Wiedmann [Wed, 25 Mar 2020 09:35:00 +0000 (10:35 +0100)]
s390/qdio: extend polling support to multiple queues

When the support for polling drivers was initially added, it only
considered Input Queue 0. But as QDIO interrupts are actually for the
full device and not a single queue, this doesn't really fit for
configurations where multiple Input Queues are used.

Rework the qdio code so that interrupts for a polling driver are not
split up into actions for each queue. Instead deliver the interrupt as
a single event, and let the driver decide which queue needs what action.

When re-enabling the QDIO interrupt via qdio_start_irq(), this means
that the qdio code needs to
(1) put _all_ eligible queues back into a state where they raise IRQs,
(2) and afterwards check _all_ eligible queues for new work to bridge
    the race window.

On the qeth side of things (as the only qdio polling driver), we can now
add CQ polling support to the main NAPI poll routine. It doesn't consume
NAPI budget, and to avoid hogging the CPU we yield control after
completing one full queue worth of buffers.
The subsequent qdio_start_irq() will check for any additional work, and
have us re-schedule the NAPI instance accordingly.

Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Acked-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agos390/qeth: remove redundant if-clause in RX poll code
Julian Wiedmann [Wed, 25 Mar 2020 09:34:59 +0000 (10:34 +0100)]
s390/qeth: remove redundant if-clause in RX poll code

Whenever all completed RX buffers have been processed
(ie. rx->b_count == 0), we call down to the HW layer to scan for
additional buffers. If no further buffers are available, the code
breaks out of the while-loop.

So we never reach the 'process an RX buffer' step with rx->b_count == 0,
eliminate that check and one level of indentation.

Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agos390/qeth: split out RX poll code
Julian Wiedmann [Wed, 25 Mar 2020 09:34:58 +0000 (10:34 +0100)]
s390/qeth: split out RX poll code

The main NAPI poll routine should eventually handle more types of work,
beyond just the RX ring.
Split off the RX poll logic into a separate function, and simplify the
nested while-loop.

Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agos390/qeth: simplify RX buffer tracking
Julian Wiedmann [Wed, 25 Mar 2020 09:34:57 +0000 (10:34 +0100)]
s390/qeth: simplify RX buffer tracking

Since RX buffers may contain multiple packets, qeth's NAPI poll code can
exhaust its budget in the middle of an RX buffer. Thus we keep track of
our current position within the active RX buffer, so we can resume
processing here in the next NAPI poll period.

Clean up that code by tracking the index of the active buffer element,
instead of a pointer to it.
Also simplify the code that advances to the next RX buffer when the
current buffer has been fully processed.

v2: - remove QDIO_ELEMENT_NO() macro (davem)

Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: ena: Add PCI shutdown handler to allow safe kexec
Guilherme G. Piccoli [Fri, 20 Mar 2020 12:55:34 +0000 (09:55 -0300)]
net: ena: Add PCI shutdown handler to allow safe kexec

Currently ENA only provides the PCI remove() handler, used during rmmod
for example. This is not called on shutdown/kexec path; we are potentially
creating a failure scenario on kexec:

(a) Kexec is triggered, no shutdown() / remove() handler is called for ENA;
instead pci_device_shutdown() clears the master bit of the PCI device,
stopping all DMA transactions;

(b) Kexec reboot happens and the device gets enabled again, likely having
its FW with that DMA transaction buffered; then it may trigger the (now
invalid) memory operation in the new kernel, corrupting kernel memory area.

This patch aims to prevent this, by implementing a shutdown() handler
quite similar to the remove() one - the difference being the handling
of the netdev, which is unregistered on remove(), but following the
convention observed in other drivers, it's only detached on shutdown().

This prevents an odd issue in AWS Nitro instances, in which after the 2nd
kexec the next one will fail with an initrd corruption, caused by a wild
DMA write to invalid kernel memory. The lspci output for the adapter
present in my instance is:

00:05.0 Ethernet controller [0200]: Amazon.com, Inc. Elastic Network
Adapter (ENA) [1d0f:ec20]

Suggested-by: Gavin Shan <gshan@redhat.com>
Signed-off-by: Guilherme G. Piccoli <gpiccoli@canonical.com>
Acked-by: Sameeh Jubran <sameehj@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoselftests/net/forwarding: define libs as TEST_PROGS_EXTENDED
Hangbin Liu [Wed, 25 Mar 2020 08:41:01 +0000 (16:41 +0800)]
selftests/net/forwarding: define libs as TEST_PROGS_EXTENDED

The lib files should not be defined as TEST_PROGS, or we will run them
in run_kselftest.sh.

Also remove ethtool_lib.sh exec permission.

Fixes: 81573b18f26d ("selftests/net/forwarding: add Makefile to install tests")
Signed-off-by: Hangbin Liu <liuhangbin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoselftests/net: add missing tests to Makefile
Hangbin Liu [Wed, 25 Mar 2020 08:07:01 +0000 (16:07 +0800)]
selftests/net: add missing tests to Makefile

Find some tests are missed in Makefile by running:
for file in $(ls *.sh); do grep -q $file Makefile || echo $file; done

Signed-off-by: Hangbin Liu <liuhangbin@gmail.com>
Reviewed-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: use indirect call wrappers for skb_copy_datagram_iter()
Eric Dumazet [Wed, 25 Mar 2020 02:23:21 +0000 (19:23 -0700)]
net: use indirect call wrappers for skb_copy_datagram_iter()

TCP recvmsg() calls skb_copy_datagram_iter(), which
calls an indirect function (cb pointing to simple_copy_to_iter())
for every MSS (fragment) present in the skb.

CONFIG_RETPOLINE=y forces a very expensive operation
that we can avoid thanks to indirect call wrappers.

This patch gives a 13% increase of performance on
a single flow, if the bottleneck is the thread reading
the TCP socket.

Fixes: 950fcaecd5cc ("datagram: consolidate datagram copy to iter helpers")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Acked-by: Paolo Abeni <pabeni@redhat.com>
Acked-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agocxgb4: remove set but not used variable 'tab'
YueHaibing [Wed, 25 Mar 2020 01:17:50 +0000 (09:17 +0800)]
cxgb4: remove set but not used variable 'tab'

drivers/net/ethernet/chelsio/cxgb4/cxgb4_filter.c: In function cxgb4_get_free_ftid:
drivers/net/ethernet/chelsio/cxgb4/cxgb4_filter.c:547:23:
 warning: variable tab set but not used [-Wunused-but-set-variable]

commit 8d174351f285 ("cxgb4: rework TC filter rule insertion across regions")
involved this, remove it.

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoMerge tag 'zonefs-5.6-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/dlemoal...
Linus Torvalds [Wed, 25 Mar 2020 17:34:02 +0000 (10:34 -0700)]
Merge tag 'zonefs-5.6-rc7' of git://git./linux/kernel/git/dlemoal/zonefs

Pull zonefs fix from Damien Le Moal:
 "A single fix from me to correctly handle the size of read-only zone
  files"

* tag 'zonefs-5.6-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/dlemoal/zonefs:
  zonfs: Fix handling of read-only zones

4 years agozonfs: Fix handling of read-only zones
Damien Le Moal [Fri, 20 Mar 2020 12:36:54 +0000 (21:36 +0900)]
zonfs: Fix handling of read-only zones

The write pointer of zones in the read-only consition is defined as
invalid by the SCSI ZBC and ATA ZAC specifications. It is thus not
possible to determine the correct size of a read-only zone file on
mount. Fix this by handling read-only zones in the same manner as
offline zones by disabling all accesses to the zone (read and write)
and initializing the inode size of the read-only zone to 0).

For zones found to be in the read-only condition at runtime, only
disable write access to the zone and keep the size of the zone file to
its last updated value to allow the user to recover previously written
data.

Also fix zonefs documentation file to reflect this change.

Signed-off-by: Damien Le Moal <damien.lemoal@wdc.com>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
4 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf
David S. Miller [Wed, 25 Mar 2020 00:30:40 +0000 (17:30 -0700)]
Merge git://git./pub/scm/linux/kernel/git/pablo/nf

Pablo Neira Ayuso says:

====================
Netfilter fixes for net

The following patchset contains Netfilter fixes for net:

1) A new selftest for nf_queue, from Florian Westphal. This test
   covers two recent fixes: 07f8e4d0fddb ("tcp: also NULL skb->dev
   when copy was needed") and b738a185beaa ("tcp: ensure skb->dev is
   NULL before leaving TCP stack").

2) The fwd action breaks with ifb. For safety in next extensions,
   make sure the fwd action only runs from ingress until it is extended
   to be used from a different hook.

3) The pipapo set type now reports EEXIST in case of subrange overlaps.
   Update the rbtree set to validate range overlaps, so far this
   validation is only done only from userspace. From Stefano Brivio.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoMerge tag 'mlx5-fixes-2020-03-24' of git://git.kernel.org/pub/scm/linux/kernel/git...
David S. Miller [Wed, 25 Mar 2020 00:25:54 +0000 (17:25 -0700)]
Merge tag 'mlx5-fixes-2020-03-24' of git://git./linux/kernel/git/saeed/linux

Saeed Mahameed says:

====================
Mellanox, mlx5 fixes 2020-03-24

This series introduces some fixes to mlx5 driver.

From Aya, Fixes to the RX error recovery flows
From Leon, Fix IB capability mask

Please pull and let me know if there is any problem.

For -stable v5.5
 ('net/mlx5_core: Set IB capability mask1 to fix ib_srpt connection failure')

For -stable v5.4
 ('net/mlx5e: Fix ICOSQ recovery flow with Striding RQ')
 ('net/mlx5e: Do not recover from a non-fatal syndrome')
 ('net/mlx5e: Fix missing reset of SW metadata in Striding RQ reset')
 ('net/mlx5e: Enhance ICOSQ WQE info fields')

The above patch ('net/mlx5e: Enhance ICOSQ WQE info fields')
will fail to apply cleanly on v5.4 due to a trivial contextual conflict,
but it is an important fix, do I need to do something about it or just
assume Greg will know how to handle this ?
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agor8169: re-enable MSI on RTL8168c
Heiner Kallweit [Tue, 24 Mar 2020 19:58:29 +0000 (20:58 +0100)]
r8169: re-enable MSI on RTL8168c

The original change fixed an issue on RTL8168b by mimicking the vendor
driver behavior to disable MSI on chip versions before RTL8168d.
This however now caused an issue on a system with RTL8168c, see [0].
Therefore leave MSI disabled on RTL8168b, but re-enable it on RTL8168c.

[0] https://bugzilla.redhat.com/show_bug.cgi?id=1792839

Fixes: 003bd5b4a7b4 ("r8169: don't use MSI before RTL8168d")
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agodevlink: expand the devlink-info documentation
Jakub Kicinski [Tue, 24 Mar 2020 17:30:16 +0000 (10:30 -0700)]
devlink: expand the devlink-info documentation

We are having multiple review cycles with all vendors trying
to implement devlink-info. Let's expand the documentation with
more information about what's implemented and motivation behind
this interface in an attempt to make the implementations easier.

Describe what each info section is supposed to contain, and make
some references to other HW interfaces (PCI caps).

Document how firmware management is expected to look, to make
it clear how devlink-info and devlink-flash work in concert.

Name some future work.

v2: - improve wording
v3: - improve wording

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Reviewed-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: phy: mdio-bcm-unimac: Fix clock handling
Andre Przywara [Tue, 24 Mar 2020 16:10:10 +0000 (16:10 +0000)]
net: phy: mdio-bcm-unimac: Fix clock handling

The DT binding for this PHY describes an *optional* clock property.
Due to a bug in the error handling logic, we are actually ignoring this
clock *all* of the time so far.

Fix this by using devm_clk_get_optional() to handle this clock properly.

Fixes: b78ac6ecd1b6b ("net: phy: mdio-bcm-unimac: Allow configuring MDIO clock divider")
Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: phy: mscc: consolidate a common RGMII delay implementation
Vladimir Oltean [Tue, 24 Mar 2020 14:13:58 +0000 (16:13 +0200)]
net: phy: mscc: consolidate a common RGMII delay implementation

It looks like the VSC8584 PHY driver is rolling its own RGMII delay
configuration code, despite the fact that the logic is mostly the same.

In fact only the register layout and position for the RGMII controls has
changed. So we need to adapt and parameterize the PHY-dependent bit
fields when calling the new generic function.

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Tested-by: Antoine Tenart <antoine.tenart@bootlin.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoMerge branch 'axienet-Update-error-handling-and-add-64-bit-DMA-support'
David S. Miller [Tue, 24 Mar 2020 23:33:05 +0000 (16:33 -0700)]
Merge branch 'axienet-Update-error-handling-and-add-64-bit-DMA-support'

Andre Przywara says:

====================
net: axienet: Update error handling and add 64-bit DMA support

a minor update, fixing the 32-bit build breakage, and brightening up
Dave's christmas tree. Rebased against latest net-next/master.

This series is based on net-next as of today (9970de8b013a), which
includes Russell's fixes [1], solving the SGMII issues I have had.

[1] https://lore.kernel.org/netdev/E1j6trA-0003GY-N1@rmk-PC.armlinux.org.uk/

Changelog v2 .. v3:
- Use two "left-shifts by 16" to fix builds with 32-bit phys_addr_t
- reorder variable declarations

Changelog v1 .. v2:
- Add Reviewed-by: tags from Radhey
- Extend kerndoc documentation
- Convert DMA error handler tasklet to work queue
- log DMA mapping errors
- mark DMA mapping error checks as unlikely (in "hot" paths)
- return NETDEV_TX_OK on TX DMA mapping error (increasing TX drop counter)
- Request eth IRQ as an optional IRQ
- Remove no longer needed MDIO IRQ register names
- Drop DT propery check for address width, assume full 64 bit

This series updates the Xilinx Axienet driver to work on our board
here. One big issue was broken SGMII support, which Russell fixed already
(in net-next).
While debugging and understanding the driver, I found several problems
in the error handling and cleanup paths, which patches 2-7 address.
Patch 8 removes a annoying error message, patch 9 paves the way for newer
revisions of the IP. The next patch adds mii-tool support, just for good
measure.

The next four patches add support for 64-bit DMA. This is an integration
option on newer IP revisions (>= v7.1), and expects MSB bits in formerly
reserved registers. Without writing to those MSB registers, the state
machine won't trigger, so it's mandatory to access them, even if they
are zero. Patches 11 and 12 prepare the code by adding accessors, to
wrap this properly and keep it working on older IP revisions.
Patch 13 enables access to the MSB registers, by trying to write a
non-zero value to them and checking if that sticks. Older IP revisions
always read those registers as zero.
Patch 14 then adjusts the DMA mask, based on the autodetected MSB
feature. It uses the full 64 bits in this case, the rest of the system
(actual physical addresses in use) should provide a natural limit if the
chip has connected fewer address lines. If not, the parent DT node can
use a dma-range property.

The Xilinx PG138 and PG021 documents (in versions 7.1 in both cases)
were used for this series.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: axienet: Allow DMA to beyond 4GB
Andre Przywara [Tue, 24 Mar 2020 13:23:47 +0000 (13:23 +0000)]
net: axienet: Allow DMA to beyond 4GB

With all DMA address accesses wrapped, we can actually support 64-bit
DMA if this option was chosen at IP integration time.
If the IP has been configured for an address width greater than 32 bits,
we assume the full 64 bit DMA width is working. In practise this will be
limited by the actual system address bus width, which will ideally be the
same as the DMA IP address width.
If this is not the case, the actual width can still be configured using a
dma-ranges property in the parent of the MAC node.

This increases the DMA mask on those systems to let the kernel choose
buffers from memory at higher addresses.

Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: axienet: Autodetect 64-bit DMA capability
Andre Przywara [Tue, 24 Mar 2020 13:23:46 +0000 (13:23 +0000)]
net: axienet: Autodetect 64-bit DMA capability

When newer revisions of the Axienet IP are configured for a 64-bit bus,
we *need* to write to the MSB part of the an address registers,
otherwise the IP won't recognise this as a DMA start condition.
This is even true when the actual DMA address comes from the lower 4 GB.

To autodetect this configuration, at probe time we write all 1's to such
an MSB register, and see if any bits stick. If this is configured for a
32-bit bus, those MSB registers are RES0, so reading back 0 indicates
that no MSB writes are necessary.
On the other hands reading anything other than 0 indicated the need to
write the MSB registers, so we set the respective flag.

The actual DMA mask stays at 32-bit for now. To help bisecting, a
separate patch will enable allocations from higher addresses.

Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: axienet: Upgrade descriptors to hold 64-bit addresses
Andre Przywara [Tue, 24 Mar 2020 13:23:45 +0000 (13:23 +0000)]
net: axienet: Upgrade descriptors to hold 64-bit addresses

Newer revisions of the AXI DMA IP (>= v7.1) support 64-bit addresses,
both for the descriptors itself, as well as for the buffers they are
pointing to.
This is realised by adding "MSB" words for the next and phys pointer
right behind the existing address word, now named "LSB". These MSB words
live in formerly reserved areas of the descriptor.

If the hardware supports it, write both words when setting an address.
The buffer address is handled by two wrapper functions, the two
occasions where we set the next pointers are open coded.

For now this is guarded by a flag which we don't set yet.

Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: axienet: Wrap DMA pointer writes to prepare for 64 bit
Andre Przywara [Tue, 24 Mar 2020 13:23:44 +0000 (13:23 +0000)]
net: axienet: Wrap DMA pointer writes to prepare for 64 bit

Newer versions of the Xilink DMA IP support busses with more than 32
address bits, by introducing an MSB word for the registers holding DMA
pointers (tail/current, RX/TX descriptor addresses).
On IP configured for more than 32 bits, it is also *required* to write
both words, to let the IP recognise this as a start condition for an
MM2S request, for instance.

Wrap the DMA pointer writes with a separate function, to add this
functionality later. For now we stick to the lower 32 bits.

Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: axienet: Add mii-tool support
Andre Przywara [Tue, 24 Mar 2020 13:23:43 +0000 (13:23 +0000)]
net: axienet: Add mii-tool support

mii-tool is useful for debugging, and all it requires to work is to wire
up the ioctl ops function pointer.
Add this to the axienet driver to enable mii-tool.

Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: axienet: Drop MDIO interrupt registers from ethtools dump
Andre Przywara [Tue, 24 Mar 2020 13:23:42 +0000 (13:23 +0000)]
net: axienet: Drop MDIO interrupt registers from ethtools dump

Newer revisions of the IP don't have these registers. Since we don't
really use them, just drop them from the ethtools dump.

Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: axienet: Mark eth_irq as optional
Andre Przywara [Tue, 24 Mar 2020 13:23:41 +0000 (13:23 +0000)]
net: axienet: Mark eth_irq as optional

According to the DT binding, the Ethernet core interrupt is optional.

Use platform_get_irq_optional() to avoid the error message when the
IRQ is not specified.

Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: axienet: Check for DMA mapping errors
Andre Przywara [Tue, 24 Mar 2020 13:23:40 +0000 (13:23 +0000)]
net: axienet: Check for DMA mapping errors

Especially with the default 32-bit DMA mask, DMA buffers are a limited
resource, so their allocation can fail.
So as the DMA API documentation requires, add error checking code after
dma_map_single() calls to catch the case where we run out of "low" memory.

Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: axienet: Factor out TX descriptor chain cleanup
Andre Przywara [Tue, 24 Mar 2020 13:23:39 +0000 (13:23 +0000)]
net: axienet: Factor out TX descriptor chain cleanup

Factor out the code that cleans up a number of connected TX descriptors,
as we will need it to properly roll back a failed _xmit() call.
There are subtle differences between cleaning up a successfully sent
chain (unknown number of involved descriptors, total data size needed)
and a chain that was about to set up (number of descriptors known), so
cater for those variations with some extra parameters.

Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Reviewed-by: Radhey Shyam Pandey <radhey.shyam.pandey@xilinx.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: axienet: Improve DMA error handling
Andre Przywara [Tue, 24 Mar 2020 13:23:38 +0000 (13:23 +0000)]
net: axienet: Improve DMA error handling

Since 0 is a valid DMA address, we cannot use the physical address to
check whether a TX descriptor is valid and is holding a DMA mapping.

Use the "cntrl" member of the descriptor to make this decision, as it
contains at least the length of the buffer, so 0 points to an
uninitialised buffer.

Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Reviewed-by: Radhey Shyam Pandey <radhey.shyam.pandey@xilinx.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: axienet: Fix DMA descriptor cleanup path
Andre Przywara [Tue, 24 Mar 2020 13:23:37 +0000 (13:23 +0000)]
net: axienet: Fix DMA descriptor cleanup path

When axienet_dma_bd_init() bails out during the initialisation process,
it might do so with parts of the structure already allocated and
initialised, while other parts have not been touched yet. Before
returning in this case, we call axienet_dma_bd_release(), which does not
take care of this corner case.
This is most obvious by the first loop happily dereferencing
lp->rx_bd_v, which we actually check to be non NULL *afterwards*.

Make sure we only unmap or free already allocated structures, by:
- directly returning with -ENOMEM if nothing has been allocated at all
- checking for lp->rx_bd_v to be non-NULL *before* using it
- only unmapping allocated DMA RX regions

This avoids NULL pointer dereferences when initialisation fails.

Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: axienet: Propagate failure of DMA descriptor setup
Andre Przywara [Tue, 24 Mar 2020 13:23:36 +0000 (13:23 +0000)]
net: axienet: Propagate failure of DMA descriptor setup

When we fail allocating the DMA buffers in axienet_dma_bd_init(), we
report this error, but carry on with initialisation nevertheless.

This leads to a kernel panic when the driver later wants to send a
packet, as it uses uninitialised data structures.

Make the axienet_device_reset() routine return an error value, as it
contains the DMA buffer initialisation. Make sure we propagate the error
up the chain and eventually fail the driver initialisation, to avoid
relying on non-initialised buffers.

Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Reviewed-by: Radhey Shyam Pandey <radhey.shyam.pandey@xilinx.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: axienet: Convert DMA error handler to a work queue
Andre Przywara [Tue, 24 Mar 2020 13:23:35 +0000 (13:23 +0000)]
net: axienet: Convert DMA error handler to a work queue

The DMA error handler routine is currently a tasklet, scheduled to run
after the DMA error IRQ was handled.
However it needs to take the MDIO mutex, which is not allowed to do in a
tasklet. A kernel (with debug options) complains consequently:
[  614.050361] net eth0: DMA Tx error 0x174019
[  614.064002] net eth0: Current BD is at: 0x8f84aa0ce
[  614.080195] BUG: sleeping function called from invalid context at kernel/locking/mutex.c:935
[  614.109484] in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 40, name: kworker/u4:4
[  614.135428] 3 locks held by kworker/u4:4/40:
[  614.149075]  #0: ffff000879863328 ((wq_completion)rpciod){....}, at: process_one_work+0x1f0/0x6a8
[  614.177528]  #1: ffff80001251bdf8 ((work_completion)(&task->u.tk_work)){....}, at: process_one_work+0x1f0/0x6a8
[  614.209033]  #2: ffff0008784e0110 (sk_lock-AF_INET-RPC){....}, at: tcp_sendmsg+0x24/0x58
[  614.235429] CPU: 0 PID: 40 Comm: kworker/u4:4 Not tainted 5.6.0-rc3-00926-g4a165a9d5921 #26
[  614.260854] Hardware name: ARM Test FPGA (DT)
[  614.274734] Workqueue: rpciod rpc_async_schedule
[  614.289022] Call trace:
[  614.296871]  dump_backtrace+0x0/0x1a0
[  614.308311]  show_stack+0x14/0x20
[  614.318751]  dump_stack+0xbc/0x100
[  614.329403]  ___might_sleep+0xf0/0x140
[  614.341018]  __might_sleep+0x4c/0x80
[  614.352201]  __mutex_lock+0x5c/0x8a8
[  614.363348]  mutex_lock_nested+0x1c/0x28
[  614.375654]  axienet_dma_err_handler+0x38/0x388
[  614.389999]  tasklet_action_common.isra.15+0x160/0x1a8
[  614.405894]  tasklet_action+0x24/0x30
[  614.417297]  efi_header_end+0xe0/0x494
[  614.429020]  irq_exit+0xd0/0xd8
[  614.439047]  __handle_domain_irq+0x60/0xb0
[  614.451877]  gic_handle_irq+0xdc/0x2d0
[  614.463486]  el1_irq+0xcc/0x180
[  614.473451]  __tcp_transmit_skb+0x41c/0xb58
[  614.486513]  tcp_write_xmit+0x224/0x10a0
[  614.498792]  __tcp_push_pending_frames+0x38/0xc8
[  614.513126]  tcp_rcv_established+0x41c/0x820
[  614.526301]  tcp_v4_do_rcv+0x8c/0x218
[  614.537784]  __release_sock+0x5c/0x108
[  614.549466]  release_sock+0x34/0xa0
[  614.560318]  tcp_sendmsg+0x40/0x58
[  614.571053]  inet_sendmsg+0x40/0x68
[  614.582061]  sock_sendmsg+0x18/0x30
[  614.593074]  xs_sendpages+0x218/0x328
[  614.604506]  xs_tcp_send_request+0xa0/0x1b8
[  614.617461]  xprt_transmit+0xc8/0x4f0
[  614.628943]  call_transmit+0x8c/0xa0
[  614.640028]  __rpc_execute+0xbc/0x6f8
[  614.651380]  rpc_async_schedule+0x28/0x48
[  614.663846]  process_one_work+0x298/0x6a8
[  614.676299]  worker_thread+0x40/0x490
[  614.687687]  kthread+0x134/0x138
[  614.697804]  ret_from_fork+0x10/0x18
[  614.717319] xilinx_axienet 7fe00000.ethernet eth0: Link is Down
[  615.748343] xilinx_axienet 7fe00000.ethernet eth0: Link is Up - 1Gbps/Full - flow control off

Since tasklets are not really popular anymore anyway, lets convert this
over to a work queue, which can sleep and thus can take the MDIO mutex.

Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: xilinx: temac: Relax Kconfig dependencies
Andre Przywara [Tue, 24 Mar 2020 13:23:34 +0000 (13:23 +0000)]
net: xilinx: temac: Relax Kconfig dependencies

Similar to axienet, the temac driver is now architecture agnostic, and
can be at least compiled for several architectures.
Especially the fact that this is a soft IP for implementing in FPGAs
makes the current restriction rather pointless, as it could literally
appear on any architecture, as long as an FPGA is connected to the bus.

The driver hasn't been actually tried on any hardware, it is just a
drive-by patch when doing the same for axienet (a similar patch for
axienet is already merged).

This (temac and axienet) have been compile-tested for:
alpha hppa64 microblaze mips64 powerpc powerpc64 riscv64 s390 sparc64
(using kernel.org cross compilers).

Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Reviewed-by: Radhey Shyam Pandey <radhey.shyam.pandey@xilinx.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoethtool: fix incorrect tx-checksumming settings reporting
Vladyslav Tarasiuk [Tue, 24 Mar 2020 11:57:08 +0000 (13:57 +0200)]
ethtool: fix incorrect tx-checksumming settings reporting

Currently, ethtool feature mask for checksum command is ORed with
NETIF_F_FCOE_CRC_BIT, which is bit's position number, instead of the
actual feature bit - NETIF_F_FCOE_CRC.

The invalid bitmask here might affect unrelated features when toggling
TX checksumming. For example, TX checksumming is always mistakenly
reported as enabled on the netdevs tested (mlx5, virtio_net).

Fixes: f70bb06563ed ("ethtool: update mapping of features to legacy ioctl requests")
Signed-off-by: Vladyslav Tarasiuk <vladyslavt@mellanox.com>
Reviewed-by: Michal Kubecek <mkubecek@suse.cz>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agocxgb4/ptp: pass the sign of offset delta in FW CMD
Raju Rangoju [Tue, 24 Mar 2020 11:40:00 +0000 (17:10 +0530)]
cxgb4/ptp: pass the sign of offset delta in FW CMD

cxgb4_ptp_fineadjtime() doesn't pass the signedness of offset delta
in FW_PTP_CMD. Fix it by passing correct sign.

Signed-off-by: Raju Rangoju <rajur@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: phy: mdio-mux-bcm-iproc: use readl_poll_timeout() to simplify code
Dejin Zheng [Tue, 24 Mar 2020 11:26:47 +0000 (19:26 +0800)]
net: phy: mdio-mux-bcm-iproc: use readl_poll_timeout() to simplify code

use readl_poll_timeout() to replace the poll codes for simplify
iproc_mdio_wait_for_idle() function

Signed-off-by: Dejin Zheng <zhengdejin5@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: dsa: tag_8021q: replace dsa_8021q_remove_header with __skb_vlan_pop
Vladimir Oltean [Tue, 24 Mar 2020 09:45:34 +0000 (11:45 +0200)]
net: dsa: tag_8021q: replace dsa_8021q_remove_header with __skb_vlan_pop

Not only did this wheel did not need reinventing, but there is also
an issue with it: It doesn't remove the VLAN header in a way that
preserves the L2 payload checksum when that is being provided by the DSA
master hw.  It should recalculate checksum both for the push, before
removing the header, and for the pull afterwards. But the current
implementation is quite dizzying, with pulls followed immediately
afterwards by pushes, the memmove is done before the push, etc.  This
makes a DSA master with RX checksumming offload to print stack traces
with the infamous 'hw csum failure' message.

So remove the dsa_8021q_remove_header function and replace it with
something that actually works with inet checksumming.

Fixes: d461933638ae ("net: dsa: tag_8021q: Create helper function for removing VLAN header")
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoMerge tag 'wireless-drivers-next-2020-03-24' of git://git.kernel.org/pub/scm/linux...
David S. Miller [Tue, 24 Mar 2020 23:15:58 +0000 (16:15 -0700)]
Merge tag 'wireless-drivers-next-2020-03-24' of git://git./linux/kernel/git/kvalo/wireless-drivers-next

Kalle Valo says:

====================
wireless-drivers-next patches for v5.7

Second set of patches for v5.7. Lots of cleanup patches this time, but
of course various new features as well fixes.

When merging with wireless-drivers this pull request has a conflict in:

drivers/net/wireless/intel/iwlwifi/pcie/drv.c

To solve that just drop the changes from commit cf52c8a776d1 in
wireless-drivers and take the hunk from wireless-drivers-next as is.
The list of specific subsystem device IDs are not necessary after
commit d6f2134a3831 (in wireless-drivers-next) anymore, the detection
is based on other characteristics of the devices.

Major changes:

qtnfmac

* support WPA3 SAE and OWE in AP mode

ath10k

* support for getting btcoex settings from Device Tree

* support QCA9377 SDIO device

ath11k

* add HE rate accounting

* add thermal sensor and cooling devices

mt76

* MT7663 support for the MT7615 driver
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: cbs: Fix software cbs to consider packet sending time
Zh-yuan Ye [Tue, 24 Mar 2020 08:28:25 +0000 (17:28 +0900)]
net: cbs: Fix software cbs to consider packet sending time

Currently the software CBS does not consider the packet sending time
when depleting the credits. It caused the throughput to be
Idleslope[kbps] * (Port transmit rate[kbps] / |Sendslope[kbps]|) where
Idleslope * (Port transmit rate / (Idleslope + |Sendslope|)) = Idleslope
is expected. In order to fix the issue above, this patch takes the time
when the packet sending completes into account by moving the anchor time
variable "last" ahead to the send completion time upon transmission and
adding wait when the next dequeue request comes before the send
completion time of the previous packet.

changelog:
V2->V3:
 - remove unnecessary whitespace cleanup
 - add the checks if port_rate is 0 before division

V1->V2:
 - combine variable "send_completed" into "last"
 - add the comment for estimate of the packet sending

Fixes: 585d763af09c ("net/sched: Introduce Credit Based Shaper (CBS) qdisc")
Signed-off-by: Zh-yuan Ye <ye.zh-yuan@socionext.com>
Reviewed-by: Vinicius Costa Gomes <vinicius.gomes@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet/mlx5e: Do not recover from a non-fatal syndrome
Aya Levin [Thu, 19 Mar 2020 11:25:17 +0000 (13:25 +0200)]
net/mlx5e: Do not recover from a non-fatal syndrome

For non-fatal syndromes like LOCAL_LENGTH_ERR, recovery shouldn't be
triggered. In these scenarios, the RQ is not actually in ERR state.
This misleads the recovery flow which assumes that the RQ is really in
error state and no more completions arrive, causing crashes on bad page
state.

Fixes: 8276ea1353a4 ("net/mlx5e: Report and recover from CQE with error on RQ")
Signed-off-by: Aya Levin <ayal@mellanox.com>
Reviewed-by: Tariq Toukan <tariqt@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
4 years agonet/mlx5e: Fix ICOSQ recovery flow with Striding RQ
Aya Levin [Mon, 16 Mar 2020 14:53:10 +0000 (16:53 +0200)]
net/mlx5e: Fix ICOSQ recovery flow with Striding RQ

In striding RQ mode, the buffers of an RX WQE are first
prepared and posted to the HW using a UMR WQEs via the ICOSQ.
We maintain the state of these in-progress WQEs in the RQ
SW struct.

In the flow of ICOSQ recovery, the corresponding RQ is not
in error state, hence:

- The buffers of the in-progress WQEs must be released
  and the RQ metadata should reflect it.
- Existing RX WQEs in the RQ should not be affected.

For this, wrap the dealloc of the in-progress WQEs in
a function, and use it in the ICOSQ recovery flow
instead of mlx5e_free_rx_descs().

Fixes: be5323c8379f ("net/mlx5e: Report and recover from CQE error on ICOSQ")
Signed-off-by: Aya Levin <ayal@mellanox.com>
Reviewed-by: Tariq Toukan <tariqt@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
4 years agonet/mlx5e: Fix missing reset of SW metadata in Striding RQ reset
Aya Levin [Thu, 12 Mar 2020 10:35:32 +0000 (12:35 +0200)]
net/mlx5e: Fix missing reset of SW metadata in Striding RQ reset

When resetting the RQ (moving RQ state from RST to RDY), the driver
resets the WQ's SW metadata.
In striding RQ mode, we maintain a field that reflects the actual
expected WQ head (including in progress WQEs posted to the ICOSQ).
It was mistakenly not reset together with the WQ. Fix this here.

Fixes: 8276ea1353a4 ("net/mlx5e: Report and recover from CQE with error on RQ")
Signed-off-by: Aya Levin <ayal@mellanox.com>
Reviewed-by: Tariq Toukan <tariqt@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>