ice: Add support for PFCP hardware offload in switchdev

Add support for creating PFCP filters in switchdev mode. Add support
for parsing PFCP-specific tc options: S flag and SEID.

To create a PFCP filter, a special netdev must be created and passed
to tc command:

  ip link add pfcp0 type pfcp
  tc filter add dev eth0 ingress prio 1 flower pfcp_opts \
    1:123/ff:fffffffffffffff0 skip_hw action mirred egress redirect \
    dev pfcp0

Changes in iproute2 [1] are required to be able to use pfcp_opts in tc.

ICE COMMS package is required to create a filter as it contains PFCP
profiles.

Link: https://lore.kernel.org/netdev/[email protected] [1]
Signed-off-by: Marcin Szycik <[email protected]>
Reviewed-by: Simon Horman <[email protected]>
Signed-off-by: Alexander Lobakin <[email protected]>
Signed-off-by: David S. Miller <[email protected]>

1 files changed, 6 insertions, 0 deletions

diff --git a/drivers/net/ethernet/intel/ice/ice_tc_lib.h b/drivers/net/ethernet/intel/ice/ice_tc_lib.h
index 5d188ad7517a..d84f153517ec 100644
--- a/drivers/net/ethernet/intel/ice/ice_tc_lib.h
+++ b/drivers/net/ethernet/intel/ice/ice_tc_lib.h
@@ -4,6 +4,9 @@
 #ifndef _ICE_TC_LIB_H_
 #define _ICE_TC_LIB_H_
 
+#include <linux/bits.h>
+#include <net/pfcp.h>
+
 #define ICE_TC_FLWR_FIELD_DST_MAC		BIT(0)
 #define ICE_TC_FLWR_FIELD_SRC_MAC		BIT(1)
 #define ICE_TC_FLWR_FIELD_VLAN			BIT(2)
@@ -34,6 +37,7 @@
 #define ICE_TC_FLWR_FIELD_VLAN_PRIO		BIT(27)
 #define ICE_TC_FLWR_FIELD_CVLAN_PRIO		BIT(28)
 #define ICE_TC_FLWR_FIELD_VLAN_TPID		BIT(29)
+#define ICE_TC_FLWR_FIELD_PFCP_OPTS		BIT(30)
 
 #define ICE_TC_FLOWER_MASK_32   0xFFFFFFFF
 
@@ -161,6 +165,8 @@ struct ice_tc_flower_fltr {
 	__be32 tenant_id;
 	struct gtp_pdu_session_info gtp_pdu_info_keys;
 	struct gtp_pdu_session_info gtp_pdu_info_masks;
+	struct pfcp_metadata pfcp_meta_keys;
+	struct pfcp_metadata pfcp_meta_masks;
 	u32 flags;
 	u8 tunnel_type;
 	struct ice_tc_flower_action	action;