ice: Add tc-flower filter support for channel

Add support to add/delete channel specific filter using tc-flower.
For now, only supported action is "skip_sw hw_tc <tc_num>"

Filter criteria is specific to channel and it can be
combination of L3, L3+L4, L2+L4.

Example:
MATCH criteria       Action
---------------------------
src and/or dest IPv4[6]/mask -> Forward to "hw_tc <tc_num>"
dest IPv4[6]/mask + dest L4 port -> Forward to "hw_tc <tc_num>"
dest MAC + dest L4 port -> Forward to "hw_tc <tc_num>"
src IPv4[6]/mask + src L4 port -> Forward to "hw_tc <tc_num>"
src MAC + src L4 port -> Forward to "hw_tc <tc_num>"

Adding tc-flower filter for channel using "hw_tc"
-------------------------------------------------
tc qdisc add dev <ethX> clsact

Above two steps are only needed the first time when adding
tc-flower filter.

tc filter add dev <ethX> protocol ip ingress prio 1 flower \
     dst_ip 192.168.0.1/32 ip_proto tcp dst_port 5001 \
     skip_sw hw_tc 1

tc filter show dev <ethX> ingress
filter protocol ip pref 1 flower chain 0
filter protocol ip pref 1 flower chain 0 handle 0x1 hw_tc 1
  eth_type ipv4
  ip_proto tcp
  dst_ip 192.168.0.1
  dst_port 5001
  skip_sw
  in_hw in_hw_count 1

Delete specific filter:
-------------------------
tc filter del  dev <ethx> ingress pref 1 handle 0x1 flower

Delete All filters:
------------------
tc filter del dev <ethX> ingress

Co-developed-by: Amritha Nambiar <amritha.nambiar@intel.com>
Signed-off-by: Amritha Nambiar <amritha.nambiar@intel.com>
Signed-off-by: Kiran Patil <kiran.patil@intel.com>
Signed-off-by: Sudheer Mogilappagari <sudheer.mogilappagari@intel.com>
Tested-by: Bharathi Sreenivas <bharathi.sreenivas@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/drivers/net/ethernet/intel/ice/ice_switch.h b/drivers/net/ethernet/intel/ice/ice_switch.h
index d4c0a3b594af..c4dd2062c469 100644
--- a/drivers/net/ethernet/intel/ice/ice_switch.h
+++ b/drivers/net/ethernet/intel/ice/ice_switch.h
@@ -335,6 +335,8 @@ enum ice_status
 ice_remove_eth_mac(struct ice_hw *hw, struct list_head *em_list);
 int
 ice_cfg_rdma_fltr(struct ice_hw *hw, u16 vsi_handle, bool enable);
+bool ice_mac_fltr_exist(struct ice_hw *hw, u8 *mac, u16 vsi_handle);
+bool ice_vlan_fltr_exist(struct ice_hw *hw, u16 vlan_id, u16 vsi_handle);
 void ice_remove_vsi_fltr(struct ice_hw *hw, u16 vsi_handle);
 enum ice_status
 ice_add_vlan(struct ice_hw *hw, struct list_head *m_list);