net/mlx5e: TC, Add support for VxLAN GBP encap/decap flows offload

Add HW offloading support for TC flows with VxLAN GBP encap/decap.

Example of encap rule:
tc filter add dev eth0 protocol ip ingress flower \
action tunnel_key set id 42 vxlan_opts 512 \
action mirred egress redirect dev vxlan1

Example of decap rule:
tc filter add dev vxlan1 protocol ip ingress flower \
enc_key_id 42 enc_dst_port 4789 vxlan_opts 1024 \
action tunnel_key unset action mirred egress redirect dev eth0

Signed-off-by: Gavin Li <gavinl@nvidia.com>
Reviewed-by: Gavi Teitz <gavi@nvidia.com>
Reviewed-by: Roi Dayan <roid@nvidia.com>
Reviewed-by: Maor Dickman <maord@nvidia.com>
Acked-by: Saeed Mahameed <saeedm@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

net/mlx5e: Don't support encap rules with gbp option

Previously, encap rules with gbp option would be offloaded by mistake but
driver does not support gbp option offload.

To fix this issue, check if the encap rule has gbp option and don't
offload the rule

Fixes: d8f9dfae49ce ("net: sched: allow flower to match vxlan options")
Signed-off-by: Gavin Li <gavinl@nvidia.com>
Reviewed-by: Maor Dickman <maord@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

net/mlx5e: Specify out ifindex when looking up encap route

There is a use case that the local and remote VTEPs are in the same
host. Currently, the out ifindex is not specified when looking up the
encap route for offloads. So in this case, a local route is returned
and the route dev is lo.

Actual tunnel interface can be created with a parameter "dev" [1],
which specifies the physical device to use for tunnel endpoint
communication. Pass this parameter to driver when looking up encap
route for offloads. So that a unicast route will be returned.

[1] ip link add name vxlan1 type vxlan id 100 dev enp4s0f0 remote 1.1.1.1 dstport 4789

Signed-off-by: Chris Mi <cmi@nvidia.com>
Reviewed-by: Maor Dickman <maord@nvidia.com>
Reviewed-by: Roi Dayan <roid@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

net/mlx5e: Consider geneve_opts for encap contexts

Current algorithm for encap keys is legacy from initial vxlan
implementation and doesn't take into account all possible fields of a
tunnel. For example, for a Geneve tunnel, which may have additional TLV
options, they are ignored when comparing encap keys and a rule can be
attached to an incorrect encap entry.

Fix that by introducing encap_info_equal() operation in
struct mlx5e_tc_tunnel. Geneve tunnel type uses custom implementation,
which extends generic algorithm and considers options if they are set.

Fixes: 7f1a546e3222 ("net/mlx5e: Consider tunnel type for encap contexts")
Signed-off-by: Dima Chumak <dchumak@nvidia.com>
Reviewed-by: Vlad Buslov <vladbu@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>

net/mlx5e: E-Switch, Add misc bit when misc fields changed for mirroring

The modified flow_context fields in FTE must be indicated in
modify_enable bitmask. Previously, the misc bit in modify_enable is
always set as source vport must be set for each rule. So, when parsing
vxlan/gre/geneve/qinq rules, this bit is not set because those are all
from the same misc fileds that source vport fields are located at, and
we don't need to set the indicator twice.

After adding per vport tables for mirroring, misc bit is not set, then
firmware syndrome happens. To fix it, set the bit wherever misc fileds
are changed. This also makes it unnecessary to check misc fields and set
the misc bit accordingly in metadata matching, so here remove it.

Besides, flow_source must be specified for uplink because firmware
will check it and some actions are only allowed for packets received
from uplink.

Fixes: 96e326878fa5 ("net/mlx5e: Eswitch, Use per vport tables for mirroring")
Signed-off-by: Jianbo Liu <jianbol@mellanox.com>
Reviewed-by: Chris Mi <chrism@mellanox.com>
Reviewed-by: Roi Dayan <roid@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

net: flow_offload: rename tc_cls_flower_offload to flow_cls_offload

And any other existing fields in this structure that refer to tc.
Specifically:

* tc_cls_flower_offload_flow_rule() to flow_cls_offload_flow_rule().
* TC_CLSFLOWER_* to FLOW_CLS_*.
* tc_cls_common_offload to tc_cls_common_offload.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/mlx5e: Rearrange tc tunnel code in a modular way

Rearrange tc tunnel code so that it would be easy to add future tunnels:
- Define tc tunnel object with the fields and callbacks that any
tunnel must implement.
- Define tc UDP tunnel object for UDP tunnels, such as VXLAN
- Move each tunnel code (GRE, VXLAN) to its own separate file
- Rewrite tc tunnel implementation in a general way - using only
the objects and their callbacks.

Reviewed-by: Oz Shlomo <ozsh@mellanox.com>
Signed-off-by: Yevgeny Kliteynik <kliteyn@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>