[PATCH net-next v5 21/21] ice: Add support for PFCP hardware offload in switchdev

Alexander Lobakin
2024-02-01T12:25:27Z

From: Marcin Szycik <marcin.szycik@linux.intel.com>

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 <simon.horman@corigine.com>
Signed-off-by: Alexander Lobakin <aleksander.lobakin@intel.com>
---
.../net/ethernet/intel/ice/ice_flex_type.h | 4 +-
.../ethernet/intel/ice/ice_protocol_type.h | 12 +++
drivers/net/ethernet/intel/ice/ice_switch.h | 2 +
drivers/net/ethernet/intel/ice/ice_tc_lib.h | 6 ++
drivers/net/ethernet/intel/ice/ice_ddp.c | 9 ++
drivers/net/ethernet/intel/ice/ice_switch.c | 85 +++++++++++++++++++
drivers/net/ethernet/intel/ice/ice_tc_lib.c | 58 +++++++++++--
7 files changed, 169 insertions(+), 7 deletions(-)

diff --git a/drivers/net/ethernet/intel/ice/ice_flex_type.h b/drivers/net/ethernet/intel/ice/ice_flex_type.h
index d427a79d001a..817beca591e0 100644
--- a/drivers/net/ethernet/intel/ice/ice_flex_type.h
+++ b/drivers/net/ethernet/intel/ice/ice_flex_type.h
@@ -93,6 +93,7 @@ enum ice_tunnel_type {
TNL_GRETAP,
TNL_GTPC,
TNL_GTPU,
+ TNL_PFCP,
__TNL_TYPE_CNT,
TNL_LAST = 0xFF,
TNL_ALL = 0xFF,
@@ -358,7 +359,8 @@ enum ice_prof_type {
ICE_PROF_TUN_GRE = 0x4,
ICE_PROF_TUN_GTPU = 0x8,
ICE_PROF_TUN_GTPC = 0x10,
- ICE_PROF_TUN_ALL = 0x1E,
+ ICE_PROF_TUN_PFCP = 0x20,
+ ICE_PROF_TUN_ALL = 0x3E,
ICE_PROF_ALL = 0xFF,
};

diff --git a/drivers/net/ethernet/intel/ice/ice_protocol_type.h b/drivers/net/ethernet/intel/ice/ice_protocol_type.h
index f6f27361c3cf..755a9c55267c 100644
--- a/drivers/net/ethernet/intel/ice/ice_protocol_type.h
+++ b/drivers/net/ethernet/intel/ice/ice_protocol_type.h
@@ -43,6 +43,7 @@ enum ice_protocol_type {
ICE_NVGRE,
ICE_GTP,
ICE_GTP_NO_PAY,
+ ICE_PFCP,
ICE_PPPOE,
ICE_L2TPV3,
ICE_VLAN_EX,
@@ -61,6 +62,7 @@ enum ice_sw_tunnel_type {
ICE_SW_TUN_NVGRE,
ICE_SW_TUN_GTPU,
ICE_SW_TUN_GTPC,
+ ICE_SW_TUN_PFCP,
ICE_ALL_TUNNELS /* All tunnel types including NVGRE */
};

@@ -202,6 +204,15 @@ struct ice_udp_gtp_hdr {
u8 rsvrd;
};

+struct ice_pfcp_hdr {
+ u8 flags;
+ u8 msg_type;
+ __be16 length;
+ __be64 seid;
+ __be32 seq;
+ u8 spare;
+} __packed __aligned(__alignof__(u16));
+
struct ice_pppoe_hdr {
u8 rsrvd_ver_type;
u8 rsrvd_code;
@@ -418,6 +429,7 @@ union ice_prot_hdr {
struct ice_udp_tnl_hdr tnl_hdr;
struct ice_nvgre_hdr nvgre_hdr;
struct ice_udp_gtp_hdr gtp_hdr;
+ struct ice_pfcp_hdr pfcp_hdr;
struct ice_pppoe_hdr pppoe_hdr;
struct ice_l2tpv3_sess_hdr l2tpv3_sess_hdr;
struct ice_hw_metadata metadata;
diff --git a/drivers/net/ethernet/intel/ice/ice_switch.h b/drivers/net/ethernet/intel/ice/ice_switch.h
index db7e501b7e0a..30091a80e7fa 100644
--- a/drivers/net/ethernet/intel/ice/ice_switch.h
+++ b/drivers/net/ethernet/intel/ice/ice_switch.h
@@ -21,6 +21,8 @@
#define ICE_PROFID_IPV6_GTPC_NO_TEID 45
#define ICE_PROFID_IPV6_GTPU_TEID 46
#define ICE_PROFID_IPV6_GTPU_IPV6_TCP_INNER 70
+#define ICE_PROFID_IPV4_PFCP_NODE 79
+#define ICE_PROFID_IPV6_PFCP_SESSION 82

#define ICE_SW_RULE_VSI_LIST_SIZE(s, n) struct_size((s), vsi, (n))
#define ICE_SW_RULE_RX_TX_HDR_SIZE(s, l) struct_size((s), hdr_data, (l))
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;
diff --git a/drivers/net/ethernet/intel/ice/ice_ddp.c b/drivers/net/ethernet/intel/ice/ice_ddp.c
index 8b7504a9df31..57278ec71aac 100644
--- a/drivers/net/ethernet/intel/ice/ice_ddp.c
+++ b/drivers/net/ethernet/intel/ice/ice_ddp.c
@@ -721,6 +721,12 @@ static bool ice_is_gtp_c_profile(u16 prof_idx)
}
}

+static bool ice_is_pfcp_profile(u16 prof_idx)
+{
+ return prof_idx >= ICE_PROFID_IPV4_PFCP_NODE &&
+ prof_idx <= ICE_PROFID_IPV6_PFCP_SESSION;
+}
+
/**
* ice_get_sw_prof_type - determine switch profile type
* @hw: pointer to the HW structure
@@ -738,6 +744,9 @@ static enum ice_prof_type ice_get_sw_prof_type(struct ice_hw *hw,
if (ice_is_gtp_u_profile(prof_idx))
return ICE_PROF_TUN_GTPU;

+ if (ice_is_pfcp_profile(prof_idx))
+ return ICE_PROF_TUN_PFCP;
+
for (i = 0; i < hw->blk[ICE_BLK_SW].es.fvw; i++) {
/* UDP tunnel will have UDP_OF protocol ID and VNI offset */
if (fv->ew[i].prot_id == (u8)ICE_PROT_UDP_OF &&
diff --git a/drivers/net/ethernet/intel/ice/ice_switch.c b/drivers/net/ethernet/intel/ice/ice_switch.c
index f84bab80ca42..0138fc832a23 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),
@@ -4526,6 +4600,7 @@ 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),
@@ -4559,6 +4634,7 @@ 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 },
@@ -5266,6 +5342,9 @@ 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;
@@ -5548,6 +5627,9 @@ 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;
}
@@ -5688,6 +5770,9 @@ 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;
diff --git a/drivers/net/ethernet/intel/ice/ice_tc_lib.c b/drivers/net/ethernet/intel/ice/ice_tc_lib.c
index 80797db9f2b9..2f2fce285ecd 100644
--- a/drivers/net/ethernet/intel/ice/ice_tc_lib.c
+++ b/drivers/net/ethernet/intel/ice/ice_tc_lib.c
@@ -38,6 +38,9 @@ ice_tc_count_lkups(u32 flags, struct ice_tc_flower_lyr_2_4_hdrs *headers,
if (flags & ICE_TC_FLWR_FIELD_GTP_OPTS)
lkups_cnt++;

+ if (flags & ICE_TC_FLWR_FIELD_PFCP_OPTS)
+ lkups_cnt++;
+
if (flags & (ICE_TC_FLWR_FIELD_ENC_SRC_IPV4 |
ICE_TC_FLWR_FIELD_ENC_DEST_IPV4 |
ICE_TC_FLWR_FIELD_ENC_SRC_IPV6 |
@@ -138,6 +141,8 @@ ice_proto_type_from_tunnel(enum ice_tunnel_type type)
return ICE_GTP;
case TNL_GTPC:
return ICE_GTP_NO_PAY;
+ case TNL_PFCP:
+ return ICE_PFCP;
default:
return 0;
}
@@ -157,6 +162,8 @@ ice_sw_type_from_tunnel(enum ice_tunnel_type type)
return ICE_SW_TUN_GTPU;
case TNL_GTPC:
return ICE_SW_TUN_GTPC;
+ case TNL_PFCP:
+ return ICE_SW_TUN_PFCP;
default:
return ICE_NON_TUN;
}
@@ -236,6 +243,22 @@ ice_tc_fill_tunnel_outer(u32 flags, struct ice_tc_flower_fltr *fltr,
i++;
}

+ if (flags & ICE_TC_FLWR_FIELD_PFCP_OPTS) {
+ struct ice_pfcp_hdr *hdr_h, *hdr_m;
+
+ hdr_h = &list[i].h_u.pfcp_hdr;
+ hdr_m = &list[i].m_u.pfcp_hdr;
+ list[i].type = ICE_PFCP;
+
+ hdr_h->flags = fltr->pfcp_meta_keys.type;
+ hdr_m->flags = fltr->pfcp_meta_masks.type & 0x01;
+
+ hdr_h->seid = fltr->pfcp_meta_keys.seid;
+ hdr_m->seid = fltr->pfcp_meta_masks.seid;
+
+ i++;
+ }
+
if (flags & (ICE_TC_FLWR_FIELD_ENC_SRC_IPV4 |
ICE_TC_FLWR_FIELD_ENC_DEST_IPV4)) {
list[i].type = ice_proto_type_from_ipv4(false);
@@ -366,8 +389,11 @@ ice_tc_fill_rules(struct ice_hw *hw, u32 flags,
if (tc_fltr->tunnel_type != TNL_LAST) {
i = ice_tc_fill_tunnel_outer(flags, tc_fltr, list, i);

- headers = &tc_fltr->inner_headers;
- inner = true;
+ /* PFCP is considered non-tunneled - don't swap headers. */
+ if (tc_fltr->tunnel_type != TNL_PFCP) {
+ headers = &tc_fltr->inner_headers;
+ inner = true;
+ }
}

if (flags & ICE_TC_FLWR_FIELD_ETH_TYPE_ID) {
@@ -621,6 +647,8 @@ static int ice_tc_tun_get_type(struct net_device *tunnel_dev)
*/
if (netif_is_gtp(tunnel_dev))
return TNL_GTPU;
+ if (netif_is_pfcp(tunnel_dev))
+ return TNL_PFCP;
return TNL_LAST;
}

@@ -1415,6 +1443,20 @@ ice_parse_tunnel_attr(struct net_device *dev, struct flow_rule *rule,
fltr->flags |= ICE_TC_FLWR_FIELD_GTP_OPTS;
}

+ if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_ENC_OPTS) &&
+ fltr->tunnel_type == TNL_PFCP) {
+ struct flow_match_enc_opts match;
+
+ flow_rule_match_enc_opts(rule, &match);
+
+ memcpy(&fltr->pfcp_meta_keys, match.key->data,
+ sizeof(struct pfcp_metadata));
+ memcpy(&fltr->pfcp_meta_masks, match.mask->data,
+ sizeof(struct pfcp_metadata));
+
+ fltr->flags |= ICE_TC_FLWR_FIELD_PFCP_OPTS;
+ }
+
return 0;
}

@@ -1473,10 +1515,14 @@ ice_parse_cls_flower(struct net_device *filter_dev, struct ice_vsi *vsi,
return err;
}

- /* header pointers should point to the inner headers, outer
- * header were already set by ice_parse_tunnel_attr
- */
- headers = &fltr->inner_headers;
+ /* PFCP is considered non-tunneled - don't swap headers. */
+ if (fltr->tunnel_type != TNL_PFCP) {
+ /* Header pointers should point to the inner headers,
+ * outer header were already set by
+ * ice_parse_tunnel_attr().
+ */
+ headers = &fltr->inner_headers;
+ }
} else if (dissector->used_keys &
(BIT_ULL(FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS) |
BIT_ULL(FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS) |
--
2.43.0