There is no point of calculating reg_c1 or overriding reg_c0 if we are
going to abort the function.
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
Reviewed-by: Roi Dayan <roid@nvidia.com>

Fix the following coccicheck warnings:

drivers/net/ethernet/mellanox/mlx5/core/sf/dev/dev.h:50:8-9: WARNING:
return of 0/1 in function 'mlx5_sf_dev_allocated' with return type bool
Signed-off-by: Roi Dayan <roid@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

mlx5_tc_ct_init() either returns a valid pointer or a NULL, either way
the caller can continue, remove IS_ERR check from callers as it has no
effect.
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

Some of the stubs for CONFIG_MLX5_CLS_ACT==disabled are missing "static
inline" in their definition which causes the following compilation
warnings:

   In file included from drivers/net/ethernet/mellanox/mlx5/core/eswitch_offloads.c:41:
>> drivers/net/ethernet/mellanox/mlx5/core/esw/indir_table.h:34:1: warning: no previous prototype for function 'mlx5_esw_indir_table_init' [-Wmissing-prototypes]
   mlx5_esw_indir_table_init(void)
   ^
   drivers/net/ethernet/mellanox/mlx5/core/esw/indir_table.h:33:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   struct mlx5_esw_indir_table *
   ^
   static
>> drivers/net/ethernet/mellanox/mlx5/core/esw/indir_table.h:40:1: warning: no previous prototype for function 'mlx5_esw_indir_table_destroy' [-Wmissing-prototypes]
   mlx5_esw_indir_table_destroy(struct mlx5_esw_indir_table *indir)
   ^
   drivers/net/ethernet/mellanox/mlx5/core/esw/indir_table.h:39:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void
   ^
   static
>> drivers/net/ethernet/mellanox/mlx5/core/esw/indir_table.h:61:1: warning: no previous prototype for function 'mlx5_esw_indir_table_needed' [-Wmissing-prototypes]
   mlx5_esw_indir_table_needed(struct mlx5_eswitch *esw,
   ^
   drivers/net/ethernet/mellanox/mlx5/core/esw/indir_table.h:60:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   bool
   ^
   static
   3 warnings generated.

Add "static inline" prefix to signatures of stubs that were missing it.
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Vlad Buslov <vladbu@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

When CONFIG_IPV6 is disabled the header nexthop.h is not included by
fib_notifier.h which causes tc_tun_encap.c to fail to compile:

   In file included from drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun_encap.c:5:
   In file included from drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun_encap.h:7:
   In file included from drivers/net/ethernet/mellanox/mlx5/core/en/tc_priv.h:7:
   In file included from drivers/net/ethernet/mellanox/mlx5/core/en_tc.h:40:
   drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun.h:78:5: warning: no previous prototype for function 'mlx5e_tc_tun_update_header_ipv6' [-Wmissing-prototypes]
   int mlx5e_tc_tun_update_header_ipv6(struct mlx5e_priv *priv,
       ^
   drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun.h:78:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   int mlx5e_tc_tun_update_header_ipv6(struct mlx5e_priv *priv,
   ^
   static
>> drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun_encap.c:1510:12: error: implicit declaration of function 'fib_info_nh' [-Werror,-Wimplicit-function-declaration]
           fib_dev = fib_info_nh(fen_info->fi, 0)->fib_nh_dev;
                     ^
   drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun_encap.c:1510:12: note: did you mean 'fib_info_put'?
   include/net/ip_fib.h:528:20: note: 'fib_info_put' declared here
   static inline void fib_info_put(struct fib_info *fi)
                      ^
>> drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun_encap.c:1510:42: error: member reference type 'int' is not a pointer
           fib_dev = fib_info_nh(fen_info->fi, 0)->fib_nh_dev;
                     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~  ^
   include/net/ip_fib.h:113:21: note: expanded from macro 'fib_nh_dev'
   #define fib_nh_dev              nh_common.nhc_dev
                                   ^
>> drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun_encap.c:1552:13: error: incomplete definition of type 'struct fib6_entry_notifier_info'
           fen_info = container_of(info, struct fib6_entry_notifier_info, info);
                      ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   include/linux/kernel.h:694:51: note: expanded from macro 'container_of'
           BUILD_BUG_ON_MSG(!__same_type(*(ptr), ((type *)0)->member) &&   \
           ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~
   include/linux/compiler_types.h:256:74: note: expanded from macro '__same_type'
   #define __same_type(a, b) __builtin_types_compatible_p(typeof(a), typeof(b))
                                                                            ^
   include/linux/build_bug.h:39:58: note: expanded from macro 'BUILD_BUG_ON_MSG'
   #define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg)
                                       ~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~
   include/linux/compiler_types.h:320:22: note: expanded from macro 'compiletime_assert'
           _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__)
           ~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   include/linux/compiler_types.h:308:23: note: expanded from macro '_compiletime_assert'
           __compiletime_assert(condition, msg, prefix, suffix)
           ~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   include/linux/compiler_types.h:300:9: note: expanded from macro '__compiletime_assert'
                   if (!(condition))                                       \
                         ^~~~~~~~~
   drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun_encap.c:1546:9: note: forward declaration of 'struct fib6_entry_notifier_info'
           struct fib6_entry_notifier_info *fen_info;
                  ^
>> drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun_encap.c:1552:13: error: offsetof of incomplete type 'struct fib6_entry_notifier_info'
           fen_info = container_of(info, struct fib6_entry_notifier_info, info);
                      ^                  ~~~~~~
   include/linux/kernel.h:697:21: note: expanded from macro 'container_of'
           ((type *)(__mptr - offsetof(type, member))); })
                              ^        ~~~~
   include/linux/stddef.h:17:32: note: expanded from macro 'offsetof'
   #define offsetof(TYPE, MEMBER)  __compiler_offsetof(TYPE, MEMBER)
                                   ^                   ~~~~
   include/linux/compiler_types.h:140:35: note: expanded from macro '__compiler_offsetof'
   #define __compiler_offsetof(a, b)       __builtin_offsetof(a, b)
                                           ^                  ~
   drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun_encap.c:1546:9: note: forward declaration of 'struct fib6_entry_notifier_info'
           struct fib6_entry_notifier_info *fen_info;
                  ^
>> drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun_encap.c:1552:11: error: assigning to 'struct fib6_entry_notifier_info *' from incompatible type 'void'
           fen_info = container_of(info, struct fib6_entry_notifier_info, info);
                    ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>> drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun_encap.c:1553:12: error: implicit declaration of function 'fib6_info_nh_dev' [-Werror,-Wimplicit-function-declaration]
           fib_dev = fib6_info_nh_dev(fen_info->rt);
                     ^
   drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun_encap.c:1553:37: error: incomplete definition of type 'struct fib6_entry_notifier_info'
           fib_dev = fib6_info_nh_dev(fen_info->rt);
                                      ~~~~~~~~^
   drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun_encap.c:1546:9: note: forward declaration of 'struct fib6_entry_notifier_info'
           struct fib6_entry_notifier_info *fen_info;
                  ^
   drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun_encap.c:1555:14: error: incomplete definition of type 'struct fib6_entry_notifier_info'
               fen_info->rt->fib6_dst.plen != 128)
               ~~~~~~~~^
   drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun_encap.c:1546:9: note: forward declaration of 'struct fib6_entry_notifier_info'
           struct fib6_entry_notifier_info *fen_info;
                  ^
   drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun_encap.c:1562:39: error: incomplete definition of type 'struct fib6_entry_notifier_info'
           memcpy(&key.endpoint_ip.v6, &fen_info->rt->fib6_dst.addr,
                                        ~~~~~~~~^
   drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun_encap.c:1546:9: note: forward declaration of 'struct fib6_entry_notifier_info'
           struct fib6_entry_notifier_info *fen_info;
                  ^
   drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun_encap.c:1563:24: error: incomplete definition of type 'struct fib6_entry_notifier_info'
                  sizeof(fen_info->rt->fib6_dst.addr));
                         ~~~~~~~~^
   drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun_encap.c:1546:9: note: forward declaration of 'struct fib6_entry_notifier_info'
           struct fib6_entry_notifier_info *fen_info;
                  ^
   1 warning and 10 errors generated.

Manually include net/nexthop.h in tc_tun_encap.c.
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Vlad Buslov <vladbu@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

The alternative implementation of this function in a header file
is declared as a global symbol, and gets added to every .c file
that includes it, which leads to a link error:

arm-linux-gnueabi-ld: drivers/net/ethernet/mellanox/mlx5/core/en_rx.o: in function `mlx5e_tc_tun_update_header_ipv6':
en_rx.c:(.text+0x0): multiple definition of `mlx5e_tc_tun_update_header_ipv6'; drivers/net/ethernet/mellanox/mlx5/core/en_main.o:en_main.c:(.text+0x0): first defined here

Mark it 'static inline' like the other functions here.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Vlad Buslov <vladbu@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

To avoid false lock dependency warning set the ct_entries_ht lock
class different than the lock class of the ht being used when deleting
last flow from a group and then deleting a group, we get into del_sw_flow_group()
which call rhashtable_destroy on fg->ftes_hash which will take ht->mutex but
it's different than the ht->mutex here.

======================================================
WARNING: possible circular locking dependency detected
5.10.0-rc2+ #8 Tainted: G           O
------------------------------------------------------
revalidator23/24009 is trying to acquire lock:
ffff888128d83828 (&node->lock){++++}-{3:3}, at: mlx5_del_flow_rules+0x83/0x7a0 [mlx5_core]

but task is already holding lock:
ffff8881081ef518 (&ht->mutex){+.+.}-{3:3}, at: rhashtable_free_and_destroy+0x37/0x720

which lock already depends on the new lock.
Signed-off-by: Roi Dayan <roid@nvidia.com>
Reviewed-by: Paul Blakey <paulb@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

MLX5_INTERFACE_STATE_UP is far from being reliable check for success to
recover, because it can be changed any time and health logic doesn't
have any locks to protect from it.

The locks are not needed here because health recover is good to have,
but not must to success, so rely on the returned value from the
mlx5_recover_device() as a marker for success/failure.
Reviewed-by: Moshe Shemesh <moshe@nvidia.com>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

The check of MLX5_INTERFACE_STATE_UP is completely useless, because
the FW tracer cleanup is called on every change of the interface
and it ensures that notifier is disabled together with canceling
all the pending works.
Reviewed-by: Moshe Shemesh <moshe@nvidia.com>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

The FW tracer check is called twice, so delete one of them.
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

The mix between probe/unprobe and reload flows causes to have an extra
mutex lock intf_state_mutex that generates LOCKDEP warning between it
and devlink_mutex. As a preparation for the future removal, separate
those flows.
Reviewed-by: Moshe Shemesh <moshe@nvidia.com>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

The interface state is constant at this stage and checked
before calling to the register/unregister reserved GIDs.

There is no need to double check it.
Reviewed-by: Moshe Shemesh <moshe@nvidia.com>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

Users of mlx5_eswitch_get_vport() are required to check return value
prior to passing mlx5_vport further. Fix all the places to do not skip
that check.
Reviewed-by: Eli Cohen <elic@nvidia.com>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

Few spelling fixes throughout the file.
Signed-off-by: Bhaskar Chowdhury <unixbhaskar@gmail.com>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

The extra space before tab space has been removed.
Signed-off-by: Shubhankar Kuranagatti <shubhankarvk@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Shannon Nelson says:

====================
ionic Rx updates

The ionic driver's Rx path is due for an overhaul in order to
better use memory buffers and to clean up the data structures.

The first two patches convert the driver to using page sharing
between buffers so as to lessen the  page alloc and free overhead.

The remaining patches clean up the structs and fastpath code for
better efficency.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

Make better use of our struct types and type checking by passing
the actual Rx or Tx completion type rather than a generic void
pointer type.
Signed-off-by: Shannon Nelson <snelson@pensando.io>
Signed-off-by: David S. Miller <davem@davemloft.net>

With a reconfigure of each queue is needed a rebuild of
the matching debugfs information.
Signed-off-by: Shannon Nelson <snelson@pensando.io>
Signed-off-by: David S. Miller <davem@davemloft.net>

Remove an unnecessary layer over rx skb allocation.
Signed-off-by: Shannon Nelson <snelson@pensando.io>
Signed-off-by: David S. Miller <davem@davemloft.net>

Clean up a couple of struct uses to make for better fast path
access.
Signed-off-by: Shannon Nelson <snelson@pensando.io>
Signed-off-by: David S. Miller <davem@davemloft.net>

Rework the Rx buffer allocations to use pages twice when using
normal MTU in order to cut down on buffer allocation and mapping
overhead.

Instead of tracking individual pages, in which we may have
wasted half the space when using standard 1500 MTU, we track
buffers which use half pages, so we can use the second half
of the page rather than allocate and map a new page once the
first buffer has been used.
Signed-off-by: Shannon Nelson <snelson@pensando.io>
Signed-off-by: David S. Miller <davem@davemloft.net>

Move ionic_rx_page_alloc() and ionic_rx_page_free() to earlier
in the file to make the next patch easier to review.
Signed-off-by: Shannon Nelson <snelson@pensando.io>
Signed-off-by: David S. Miller <davem@davemloft.net>

Ioana Ciornei says:

====================
dpaa2-switch: CPU terminated traffic and move out of staging

This patch set adds support for Rx/Tx capabilities on DPAA2 switch port
interfaces as well as fixing up some major blunders in how we take care
of the switching domains. The last patch actually moves the driver out
of staging now that the minimum requirements are met.

I am sending this directly towards the net-next tree so that I can use
the rest of the development cycle adding new features on top of the
current driver without worrying about merge conflicts between the
staging and net-next tree.

The control interface is comprised of 3 queues in total: Rx, Rx error
and Tx confirmation. In this patch set we only enable Rx and Tx conf.
All switch ports share the same queues when frames are redirected to the
CPU.  Information regarding the ingress switch port is passed through
frame metadata - the flow context field of the descriptor.

NAPI instances are also shared between switch net_devices and are
enabled when at least on one of the switch ports .dev_open() was called
and disabled when no switch port is still up.

Since the last version of this feature was submitted to the list, I
reworked how the switching and flooding domains are taken care of by the
driver, thus the switch is now able to also add the control port (the
queues that the CPU can dequeue from) into the flooding domains of a
port (broadcast, unknown unicast etc). With this, we are able to receive
and sent traffic from the switch interfaces.

Also, the capability to properly partition the DPSW object into multiple
switching domains was added so that when not under a bridge, the ports
are not actually capable to switch between them. This is possible by
adding a private FDB table per switch interface.  When multiple switch
interfaces are under the same bridge, they will all use the same FDB
table.

Another thing that is fixed in this patch set is how the driver handles
VLAN awareness. The DPAA2 switch is not capable to run as VLAN unaware
but this was not reflected in how the driver responded to requests to
change the VLAN awareness. In the last patch, this is fixed by
describing the switch interfaces as Rx VLAN filtering on [fixed] and
declining any request to join a VLAN unaware bridge.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

Now that the dpaa2-switch driver has basic I/O capabilities on the
switch port net_devices and multiple bridging domains are supported,
move the driver out of staging.

The dpaa2-switch driver is placed right next to the dpaa2-eth driver
since, in the near future, they will be sharing most of the data path.
I didn't implement code reuse in this patch series because I wanted to
keep it as small as possible.

Also, the README is removed from staging with the intention to add
proper rst documentation afterwards to actually match was is supported
by the driver.
Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Each time a switch port joins a bridge, it will start to use a FDB table
common with all the other switch ports that are under the same bridge.
This means that any VLAN added prior to a bridge join, will retain its
previous FDB table destination. With this patch, I choose to restrict
when a switch port can change it's upper device (either join or leave)
so that the driver does not have to delete all the previously installed
VLANs from the previous FDB and add them into the new one.

Thus, in the PRECHANGEUPPER  notification we check if there are any VLAN
type upper devices and if that's true, deny the CHANGEUPPER.

This way, the user is not restricted in the topology but rather in the
order in which the setup is done: it must first create the bridging
domain layout and after that add the necessary VLAN devices if
necessary. The teardown is similar, the VLAN devices will need to be
destroyed prior to a change in the bridging layout.
Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Upon leaving a bridge, any MAC addresses learnt on the switch port prior
to this point have to be removed so that we preserve the bridging domain
configuration.

Restructure the dpaa2_switch_port_fdb_dump() function in order to have a
common dpaa2_switch_fdb_iterate() function between the FDB dump callback
and the fast age procedure. To accomplish this, add a new callback -
dpaa2_switch_fdb_cb_t - which will be called on each MAC addr and,
depending on the situation, will either dump the FDB entry into a
netlink message or will delete the address from the FDB table, in case
of the fast-age.
Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

The DPAA2 Switch is not capable to handle traffic in a VLAN unaware
fashion, thus the previous handling of both the accepted upper devices
and the SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING flag was wrong.

Fix this by checking if the bridge that we are joining is indeed VLAN
aware, if not return an error. Also, the RX VLAN filtering feature is
defined as 'on [fixed]' and the .ndo_vlan_rx_add_vid() and
.ndo_vlan_rx_kill_vid() callbacks are implemented just by recreating a
switchdev_obj_port_vlan object and then calling the same functions used
on the switchdev notifier path.
In addition, changing the vlan_filtering flag to 0 on a bridge under
which a DPAA2 switch interface is present is not supported, thus
rejected when SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING is received with
such a request.

This patch is also adding the use of the switchdev_handle_port_attr_set
function so that we can iterate through all the lower devices of the
bridge that the notification was received on and actually catch if the
user is trying to change the vlan_filtering state. Since on a VLAN
filtering change the net_device is the bridge, we also move the
dpaa2_switch_port_dev_check call so that we do not return NOTIFY_DONE
right away.
Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com>
Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Move the notifier blocks register into the module_init() step, instead of
object probe, so that all DPSW devices probed by the dpaa2-switch driver
can use the same notifiers.

This will enable us to have a more straightforward approach in
determining if an event is intended for an object managed by this driver
or not. Previously, the dpaa2_switch_port_dev_check() function was
forced to also check the notifier block beside the net_device_ops
structure to determine if the event is for us or not.
Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Until now, the DPAA2 switch was not capable to properly setup its
switching domains depending on the existence, or lack thereof, of a
upper bridge device. This meant that all switch ports of a DPSW object
were switching by default even though they were not under the same
bridge device.

Another issue was the inability to actually add the CPU in the flooding
domains (broadcast, unknown unicast etc) of a particular switch port.
This meant that a simple ping on a switch interface was not possible
since no broadcast ARP frame would actually reach the CPU queues.

This patch tries to fix exactly these problems by:

* Creating and managing a FDB table for each flooding domain. This means
  that when a switch interface is not bridged it will use its own FDB
  table. While in bridged mode all DPAA2 switch interfaces under the
  same upper will use the same FDB table, thus leverage the same FDB
  entries.

* Adding a new MC firmware command - dpsw_set_egress_flood() - through
  which the driver can setup the flooding domains as needed. For
  example, when the switch interface is standalone, thus not in a
  bridge with any other DPAA2 switch port, it will setup its broadcast
  and unknown unicast flooding domains to only include the control
  interface (the queues that reach the CPU and the driver can dequeue
  from). This flooding domain changes when the interface joins a bridge
  and is configured to include, beside the control interface, all other
  DPAA2 switch interfaces.

We impose a minimum limit of FDB tables available equal to the number of
switch interfaces so that we guarantee that, in the maximal
configuration - all interfaces are standalone, each switch port will
have a private FDB table. At the same time, we only probe DPSW objects
that have the flooding and broadcast replicators configured to be per
FDB (DPSW_*_PER_FDB). Without this, the dpaa2-switch driver would not
be able to configure multiple switching domains.

At probe time, a FDB table will be allocated for each port. At a bridge
join event, the switch port will either continue to use the current FDB
table (if it's the first dpaa2-switch port to join that bridge) or will
switch to use the FDB table associated with the port that it's already
under the bridge. If a FDB switch is necessary, the private FDB table
which was previously used will be returned to the pool of unused FDBs.

Upon a bridge leave, the switch port needs a private FDB table thus it
will search and get the first unused FDB table. This way, all the other
ports remaining under the bridge will continue to use the same FDB
table.
Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com>
Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Enable the CTRL_IF of the switch object, now that all the pieces are in
place (buffer and queue management, interrupts, NAPI instances etc).
Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com>
Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Implement the .ndo_start_xmit() callback for the switch port interfaces.
For each of the switch ports, gather the corresponding queue
destination ID (QDID) necessary for Tx enqueueing.

We'll reserve 64 bytes for software annotations, where we keep a skb
backpointer used on the Tx confirmation side for releasing the allocated
memory. At the moment, we only support linear skbs.

Also, add support for the Tx confirmation path which for the most part
shares the code path with the normal Rx queue.
Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

The dpaa2-ethsw supports only one Rx queue that is shared by all switch
ports. This means that information about which port was the ingress port
for a specific frame needs to be passed in metadata. In our case, the
Flow Context (FLC) field from the frame descriptor holds this
information. Besides the interface ID of the ingress port we also
receive the virtual QDID of the port. Below is a visual description of
the 64 bits of FLC.

63           47           31           15           0
+---------------------------------------------------+
|            |            |            |            |
|  RESERVED  |    IF_ID   |  RESERVED  |  IF QDID   |
|            |            |            |            |
+---------------------------------------------------+

Because all switch ports share the same Rx and Tx conf queues, NAPI
management takes into consideration when there is at least one switch
interface open to enable the NAPI instance.

The Rx path is common, for the most part, for both Rx and Tx conf with
the mention that each of them has its own consume function of a frame
descriptor. Dequeueing from a FQ, consuming dequeued store and also the
NAPI poll function is common between both queues.
Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com>
Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Setup interrupts on the control interface queues. We do not force an
exact affinity between the interrupts received from a specific queue and
a cpu.
Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com>
Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Allocate and setup a buffer pool, needed on the Rx path of the control
interface. Also, define the Rx buffer size seen by the WRIOP from the
PAGE_SIZE buffers seeded.

Also, create the needed Rx rings for both frame queues used on the
control interface.  On the Rx path, when a pull-dequeue operation is
performed on a software portal, available frame descriptors are put in a
ring - a DMA memory storage - for further usage.
Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com>
Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Introduce a new structure to hold all necessary info related to an RX
queue for the control interface and populate the FQ IDs.
We only have one Rx queue and one Tx confirmation queue on the control
interface, both shared by all the switch ports.

Also, increase the minimum version of the object supported by the driver
since for a basic switch driver support we'll be in need for some ABIs
added in the latest version of firmware.
Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com>
Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Since the dpaa2-switch already listens for SWITCHDEV_FDB_ADD_TO_DEVICE /
SWITCHDEV_FDB_DEL_TO_DEVICE events emitted by the bridge, we don't need
the bridge bypass operations, and now is a good time to delete them. All
'bridge fdb' commands need the 'master' flag specified now.

In fact, having the obsolete .ndo_fdb_{add|del} callbacks would even
complicate the bridge leave/join procedures without any real benefit.
Every FDB entry is installed in an FDB ID as far as the hardware is
concerned, and the dpaa2-switch ports change their FDB ID when they join
or leave a bridge. So we would need to manually delete these FDB entries
when the FDB ID changes. That's because, unlike FDB entries added
through switchdev, where the bridge automatically deletes those on
leave, there isn't anybody who will remove the static FDB entries
installed via the bridge bypass operations upon a change in the upper
device.

Note that we still need .ndo_fdb_dump though. The dpaa2-switch does not
emit any interrupts when a new address is learnt, so we cannot keep the
bridge FDB in sync with the hardware FDB. Therefore, we need this
callback to get a chance to print the FDB entries that were dynamically
learnt by our hardware.
Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com>
Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

By default, the DPSW object is configured with VLAN ID 1 in the VLAN
table, which all ports are member of. This entry in the VLAN table
selects the same FDB ID for all ports, meaning that forwarding between
ports is permitted. This is unlike the switchdev model, where each port
should operate as standalone by default.

To make the switch operate in standalone ports mode, we need the VLAN
table to select a unique FDB ID for each port. In order to do that, we
need to simply delete the VLAN 1 created automatically by firmware, and
let dpaa2_switch_port_init take over, by readding VLAN ID 1, but
pointing towards a unique FDB ID.
Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

This patch is removing the current configuration of learning and
flooding states per switch port because they are essentially broken in
terms of integration with the switchdev APIs and the bridge
understanding of these states.

First of all, the learning state is a per switch port configuration
while the dpaa2-switch driver was using it to configure the entire
bridging domain. This is broken since the software learning state could
be out of sync with the hardware state when ports from the same bridging
domain are configured by the user with different learning parameters.

The BR_FLOOD flag has been misinterpreted as well. Instead of denoting
whether unicast traffic for which there is no FDB entry will be flooded
towards a given port, the dpaa2-switch used the flag to configure
whether or not a frame with an unknown destination received on a given
port should be flooded or not. In summary, it was used as ingress
setting instead of a egress one.

Also, remove the unnecessary call to dpsw_if_set_broadcast() and the API
definition. The HW default is to let all switch ports to be able to
flood broadcast traffic thus there is no need to call the API again.

Instead of trying to patch things up, just remove the support for the
moment so that we'll add it back cleanly once the driver is out of
staging.
Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com>
Reviewed-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

Vladimir Oltean says:

====================
Refactoring/cleanup for NXP ENETC

This series performs the following:
- makes the API for Control Buffer Descriptor Rings in enetc_cbdr.c a
  bit more tightly knit.
- moves more logic into enetc_rxbd_next to make the callers simpler
- moves more logic into enetc_refill_rx_ring to make the callers simpler
- removes forward declarations
- simplifies the probe path to unify probing for used and unused PFs.

Nothing radical.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

Since commit fd5736bf ("enetc: Workaround for MDIO register access
issue"), enetc_refill_rx_ring no longer updates the RX BD ring's
consumer index, that is left to be done by the caller. This has led to
bugs such as the ones found in 96a5223b ("net: enetc: remove bogus
write to SIRXIDR from enetc_setup_rxbdr") and 3a5d12c9 ("net: enetc:
keep RX ring consumer index in sync with hardware"), so it is desirable
that we move back the update of the consumer index into enetc_refill_rx_ring.

The trouble with that is the different MDIO locking context for the two
callers of enetc_refill_rx_ring:

- enetc_clean_rx_ring runs under enetc_lock_mdio()
- enetc_setup_rxbdr runs outside enetc_lock_mdio()

Simplify the callers of enetc_refill_rx_ring by making enetc_setup_rxbdr
explicitly take enetc_lock_mdio() around the call. It will be the only
place in need of ensuring the hot accessors can be used.
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>