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- From: David Bentham <[email protected]>
- Date: Mon, 21 Feb 2022 15:36:16 +0100
- Subject: [PATCH] net: ethernet: mtk_eth_soc: add ipv6 flow offload
- support
- Add the missing IPv6 flow offloading support for routing only.
- Hardware flow offloading is done by the packet processing engine (PPE)
- of the Ethernet MAC and as it doesn't support mangling of IPv6 packets,
- IPv6 NAT cannot be supported.
- Signed-off-by: David Bentham <[email protected]>
- Signed-off-by: Felix Fietkau <[email protected]>
- ---
- --- a/drivers/net/ethernet/mediatek/mtk_ppe_offload.c
- +++ b/drivers/net/ethernet/mediatek/mtk_ppe_offload.c
- @@ -6,6 +6,7 @@
- #include <linux/if_ether.h>
- #include <linux/rhashtable.h>
- #include <linux/ip.h>
- +#include <linux/ipv6.h>
- #include <net/flow_offload.h>
- #include <net/pkt_cls.h>
- #include <net/dsa.h>
- @@ -20,6 +21,11 @@ struct mtk_flow_data {
- __be32 src_addr;
- __be32 dst_addr;
- } v4;
- +
- + struct {
- + struct in6_addr src_addr;
- + struct in6_addr dst_addr;
- + } v6;
- };
-
- __be16 src_port;
- @@ -65,6 +71,14 @@ mtk_flow_set_ipv4_addr(struct mtk_foe_en
- data->v4.dst_addr, data->dst_port);
- }
-
- +static int
- +mtk_flow_set_ipv6_addr(struct mtk_foe_entry *foe, struct mtk_flow_data *data)
- +{
- + return mtk_foe_entry_set_ipv6_tuple(foe,
- + data->v6.src_addr.s6_addr32, data->src_port,
- + data->v6.dst_addr.s6_addr32, data->dst_port);
- +}
- +
- static void
- mtk_flow_offload_mangle_eth(const struct flow_action_entry *act, void *eth)
- {
- @@ -296,6 +310,9 @@ mtk_flow_offload_replace(struct mtk_eth
- case FLOW_DISSECTOR_KEY_IPV4_ADDRS:
- offload_type = MTK_PPE_PKT_TYPE_IPV4_HNAPT;
- break;
- + case FLOW_DISSECTOR_KEY_IPV6_ADDRS:
- + offload_type = MTK_PPE_PKT_TYPE_IPV6_ROUTE_5T;
- + break;
- default:
- return -EOPNOTSUPP;
- }
- @@ -331,6 +348,17 @@ mtk_flow_offload_replace(struct mtk_eth
- mtk_flow_set_ipv4_addr(&foe, &data, false);
- }
-
- + if (addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS) {
- + struct flow_match_ipv6_addrs addrs;
- +
- + flow_rule_match_ipv6_addrs(rule, &addrs);
- +
- + data.v6.src_addr = addrs.key->src;
- + data.v6.dst_addr = addrs.key->dst;
- +
- + mtk_flow_set_ipv6_addr(&foe, &data);
- + }
- +
- flow_action_for_each(i, act, &rule->action) {
- if (act->id != FLOW_ACTION_MANGLE)
- continue;
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