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/20230614091758.11180-1-marcin.szycik@linux.intel.com [1]
Signed-off-by: Marcin Szycik <marcin.szycik@linux.intel.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Signed-off-by: Alexander Lobakin <aleksander.lobakin@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 85 insertions, 0 deletions

diff --git a/drivers/net/ethernet/intel/ice/ice_switch.c b/drivers/net/ethernet/intel/ice/ice_switch.c
index f1f9d6b7b5c1..606c2419182a 100644
--- a/drivers/net/ethernet/intel/ice/ice_switch.c
+++ b/drivers/net/ethernet/intel/ice/ice_switch.c
@@ -42,6 +42,7 @@ enum {
 	ICE_PKT_KMALLOC		= BIT(9),
 	ICE_PKT_PPPOE		= BIT(10),
 	ICE_PKT_L2TPV3		= BIT(11),
+	ICE_PKT_PFCP		= BIT(12),
 };
 
 struct ice_dummy_pkt_offsets {
@@ -1110,6 +1111,77 @@ ICE_DECLARE_PKT_TEMPLATE(ipv6_gtp) = {
 	0x00, 0x00,
 };
 
+ICE_DECLARE_PKT_OFFSETS(pfcp_session_ipv4) = {
+	{ ICE_MAC_OFOS,		0 },
+	{ ICE_ETYPE_OL,		12 },
+	{ ICE_IPV4_OFOS,	14 },
+	{ ICE_UDP_ILOS,		34 },
+	{ ICE_PFCP,		42 },
+	{ ICE_PROTOCOL_LAST,	0 },
+};
+
+ICE_DECLARE_PKT_TEMPLATE(pfcp_session_ipv4) = {
+	0x00, 0x00, 0x00, 0x00, /* ICE_MAC_OFOS 0 */
+	0x00, 0x00, 0x00, 0x00,
+	0x00, 0x00, 0x00, 0x00,
+
+	0x08, 0x00,		/* ICE_ETYPE_OL 12 */
+
+	0x45, 0x00, 0x00, 0x2c, /* ICE_IPV4_OFOS 14 */
+	0x00, 0x01, 0x00, 0x00,
+	0x00, 0x11, 0x00, 0x00,
+	0x00, 0x00, 0x00, 0x00,
+	0x00, 0x00, 0x00, 0x00,
+
+	0x00, 0x00, 0x22, 0x65, /* ICE_UDP_ILOS 34 */
+	0x00, 0x18, 0x00, 0x00,
+
+	0x21, 0x01, 0x00, 0x0c, /* ICE_PFCP 42 */
+	0x00, 0x00, 0x00, 0x00,
+	0x00, 0x00, 0x00, 0x00,
+	0x00, 0x00, 0x00, 0x00,
+
+	0x00, 0x00,		/* 2 bytes for 4 byte alignment */
+};
+
+ICE_DECLARE_PKT_OFFSETS(pfcp_session_ipv6) = {
+	{ ICE_MAC_OFOS,		0 },
+	{ ICE_ETYPE_OL,		12 },
+	{ ICE_IPV6_OFOS,	14 },
+	{ ICE_UDP_ILOS,		54 },
+	{ ICE_PFCP,		62 },
+	{ ICE_PROTOCOL_LAST,	0 },
+};
+
+ICE_DECLARE_PKT_TEMPLATE(pfcp_session_ipv6) = {
+	0x00, 0x00, 0x00, 0x00, /* ICE_MAC_OFOS 0 */
+	0x00, 0x00, 0x00, 0x00,
+	0x00, 0x00, 0x00, 0x00,
+
+	0x86, 0xdd,		/* ICE_ETYPE_OL 12 */
+
+	0x60, 0x00, 0x00, 0x00, /* ICE_IPV6_OFOS 14 */
+	0x00, 0x10, 0x11, 0x00, /* Next header UDP */
+	0x00, 0x00, 0x00, 0x00,
+	0x00, 0x00, 0x00, 0x00,
+	0x00, 0x00, 0x00, 0x00,
+	0x00, 0x00, 0x00, 0x00,
+	0x00, 0x00, 0x00, 0x00,
+	0x00, 0x00, 0x00, 0x00,
+	0x00, 0x00, 0x00, 0x00,
+	0x00, 0x00, 0x00, 0x00,
+
+	0x00, 0x00, 0x22, 0x65, /* ICE_UDP_ILOS 54 */
+	0x00, 0x18, 0x00, 0x00,
+
+	0x21, 0x01, 0x00, 0x0c, /* ICE_PFCP 62 */
+	0x00, 0x00, 0x00, 0x00,
+	0x00, 0x00, 0x00, 0x00,
+	0x00, 0x00, 0x00, 0x00,
+
+	0x00, 0x00,		/* 2 bytes for 4 byte alignment */
+};
+
 ICE_DECLARE_PKT_OFFSETS(pppoe_ipv4_tcp) = {
 	{ ICE_MAC_OFOS,		0 },
 	{ ICE_ETYPE_OL,		12 },
@@ -1343,6 +1415,8 @@ static const struct ice_dummy_pkt_profile ice_dummy_pkt_profiles[] = {
 	ICE_PKT_PROFILE(ipv4_gtpu_ipv4_tcp, ICE_PKT_TUN_GTPU),
 	ICE_PKT_PROFILE(ipv6_gtp, ICE_PKT_TUN_GTPC | ICE_PKT_OUTER_IPV6),
 	ICE_PKT_PROFILE(ipv4_gtpu_ipv4, ICE_PKT_TUN_GTPC),
+	ICE_PKT_PROFILE(pfcp_session_ipv6, ICE_PKT_PFCP | ICE_PKT_OUTER_IPV6),
+	ICE_PKT_PROFILE(pfcp_session_ipv4, ICE_PKT_PFCP),
 	ICE_PKT_PROFILE(pppoe_ipv6_udp, ICE_PKT_PPPOE | ICE_PKT_OUTER_IPV6 |
 					ICE_PKT_INNER_UDP),
 	ICE_PKT_PROFILE(pppoe_ipv6_tcp, ICE_PKT_PPPOE | ICE_PKT_OUTER_IPV6),
@@ -4532,6 +4606,7 @@ static const struct ice_prot_ext_tbl_entry ice_prot_ext[ICE_PROTOCOL_LAST] = {
 	ICE_PROTOCOL_ENTRY(ICE_NVGRE, 0, 2, 4, 6),
 	ICE_PROTOCOL_ENTRY(ICE_GTP, 8, 10, 12, 14, 16, 18, 20, 22),
 	ICE_PROTOCOL_ENTRY(ICE_GTP_NO_PAY, 8, 10, 12, 14),
+	ICE_PROTOCOL_ENTRY(ICE_PFCP, 8, 10, 12, 14, 16, 18, 20, 22),
 	ICE_PROTOCOL_ENTRY(ICE_PPPOE, 0, 2, 4, 6),
 	ICE_PROTOCOL_ENTRY(ICE_L2TPV3, 0, 2, 4, 6, 8, 10),
 	ICE_PROTOCOL_ENTRY(ICE_VLAN_EX, 2, 0),
@@ -4565,6 +4640,7 @@ static struct ice_protocol_entry ice_prot_id_tbl[ICE_PROTOCOL_LAST] = {
 	{ ICE_NVGRE,		ICE_GRE_OF_HW },
 	{ ICE_GTP,		ICE_UDP_OF_HW },
 	{ ICE_GTP_NO_PAY,	ICE_UDP_ILOS_HW },
+	{ ICE_PFCP,		ICE_UDP_ILOS_HW },
 	{ ICE_PPPOE,		ICE_PPPOE_HW },
 	{ ICE_L2TPV3,		ICE_L2TPV3_HW },
 	{ ICE_VLAN_EX,          ICE_VLAN_OF_HW },
@@ -5272,6 +5348,9 @@ ice_get_compat_fv_bitmap(struct ice_hw *hw, struct ice_adv_rule_info *rinfo,
 	case ICE_SW_TUN_GTPC:
 		prof_type = ICE_PROF_TUN_GTPC;
 		break;
+	case ICE_SW_TUN_PFCP:
+		prof_type = ICE_PROF_TUN_PFCP;
+		break;
 	case ICE_SW_TUN_AND_NON_TUN:
 	default:
 		prof_type = ICE_PROF_ALL;
@@ -5556,6 +5635,9 @@ ice_find_dummy_packet(struct ice_adv_lkup_elem *lkups, u16 lkups_cnt,
 	case ICE_SW_TUN_VXLAN:
 		match |= ICE_PKT_TUN_UDP;
 		break;
+	case ICE_SW_TUN_PFCP:
+		match |= ICE_PKT_PFCP;
+		break;
 	default:
 		break;
 	}
@@ -5696,6 +5778,9 @@ ice_fill_adv_dummy_packet(struct ice_adv_lkup_elem *lkups, u16 lkups_cnt,
 		case ICE_GTP:
 			len = sizeof(struct ice_udp_gtp_hdr);
 			break;
+		case ICE_PFCP:
+			len = sizeof(struct ice_pfcp_hdr);
+			break;
 		case ICE_PPPOE:
 			len = sizeof(struct ice_pppoe_hdr);
 			break;