[][openwrt][mt7988][tops][TOPS Alpha release]
[Description]
Add alpha version of TOPS(tunnel offload processor system) and tops-tool
package.
TOPS package supports tunnel protocol HW offload. The support offload
tunnel protocols for Alpha version are L2oGRE and L2TPv2.
Notice that, TOPS only guarantees that inner packets are TCP. It is still
unstable for UDP inner packet flow.
tops-tool package provides several debug features such as logger, coredump
for TOPS.
[Release-log]
N/A
Change-Id: Iab6e4a89bebbe42c967f28e0c9e9c0611673f354
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/7852683
diff --git a/target/linux/mediatek/patches-5.4/999-4500-mtk-tops-gre-offload-support.patch b/target/linux/mediatek/patches-5.4/999-4500-mtk-tops-gre-offload-support.patch
new file mode 100644
index 0000000..3833fa0
--- /dev/null
+++ b/target/linux/mediatek/patches-5.4/999-4500-mtk-tops-gre-offload-support.patch
@@ -0,0 +1,45 @@
+--- a/net/ipv4/ip_gre.c
++++ b/net/ipv4/ip_gre.c
+@@ -39,6 +39,7 @@
+ #include <net/inet_ecn.h>
+ #include <net/xfrm.h>
+ #include <net/net_namespace.h>
++#include <net/netfilter/nf_flow_table.h>
+ #include <net/netns/generic.h>
+ #include <net/rtnetlink.h>
+ #include <net/gre.h>
+@@ -901,6 +902,24 @@ static int ipgre_close(struct net_device
+ }
+ #endif
+
++#if IS_ENABLED(CONFIG_NF_FLOW_TABLE)
++static int gre_dev_flow_offload_check(struct flow_offload_hw_path *path)
++{
++ struct net_device *dev = path->dev;
++ struct ip_tunnel *tunnel = netdev_priv(dev);
++
++ if (path->flags & FLOW_OFFLOAD_PATH_TNL)
++ return -EEXIST;
++
++ path->flags |= FLOW_OFFLOAD_PATH_TNL;
++ path->tnl_type = FLOW_OFFLOAD_TNL_GRETAP;
++ path->virt_dev = dev;
++ path->dev = tunnel->dev;
++
++ return 0;
++}
++#endif /* CONFIG_NF_FLOW_TABLE */
++
+ static const struct net_device_ops ipgre_netdev_ops = {
+ .ndo_init = ipgre_tunnel_init,
+ .ndo_uninit = ip_tunnel_uninit,
+@@ -1264,6 +1283,9 @@ static const struct net_device_ops gre_t
+ .ndo_get_stats64 = ip_tunnel_get_stats64,
+ .ndo_get_iflink = ip_tunnel_get_iflink,
+ .ndo_fill_metadata_dst = gre_fill_metadata_dst,
++#if IS_ENABLED(CONFIG_NF_FLOW_TABLE)
++ .ndo_flow_offload_check = gre_dev_flow_offload_check,
++#endif
+ };
+
+ static int erspan_tunnel_init(struct net_device *dev)