[][openwrt][mt7988][tops][support v1.2.0]
[Description]
Add support to TOPS v1.2.0 with latest driver and firmware
1. Fix L2TPv2 offload bugs
2. Add L2TPv2/IPsec offload feature
3. Add PPTP offload feature
[Release-log]
N/A
Change-Id: Id27778b1d88417293f306b2ea281777936545b70
Reviewed-on: https://gerrit.mediatek.inc/c/openwrt/feeds/mtk_openwrt_feeds/+/8346642
diff --git a/target/linux/mediatek/patches-5.4/999-4501-mtk-pptp-offload-support.patch b/target/linux/mediatek/patches-5.4/999-4501-mtk-pptp-offload-support.patch
new file mode 100644
index 0000000..ec218e1
--- /dev/null
+++ b/target/linux/mediatek/patches-5.4/999-4501-mtk-pptp-offload-support.patch
@@ -0,0 +1,100 @@
+--- a/drivers/net/ppp/pptp.c
++++ b/drivers/net/ppp/pptp.c
+@@ -33,6 +33,7 @@
+ #include <net/route.h>
+ #include <net/gre.h>
+ #include <net/pptp.h>
++#include <net/netfilter/nf_flow_table.h>
+
+ #include <linux/uaccess.h>
+
+@@ -40,6 +41,9 @@
+
+ #define MAX_CALLID 65535
+
++int (*mtk_pptp_seq_next)(u16 call_id, u32 *val) = NULL;
++EXPORT_SYMBOL(mtk_pptp_seq_next);
++
+ static DECLARE_BITMAP(callid_bitmap, MAX_CALLID + 1);
+ static struct pppox_sock __rcu **callid_sock;
+
+@@ -128,6 +132,26 @@ static void del_chan(struct pppox_sock *
+ spin_unlock(&chan_lock);
+ }
+
++#if IS_ENABLED(CONFIG_NF_FLOW_TABLE)
++static int pptp_flow_offload_check(struct ppp_channel *chan,
++ struct flow_offload_hw_path *path)
++{
++ struct sock *sk = (struct sock *)chan->private;
++ struct pppox_sock *po = pppox_sk(sk);
++
++ if (path->flags & FLOW_OFFLOAD_PATH_TNL)
++ return -EEXIST;
++
++ if (sk_pppox(po)->sk_state & PPPOX_DEAD)
++ return -EINVAL;
++
++ path->flags |= FLOW_OFFLOAD_PATH_TNL;
++ path->tnl_type = FLOW_OFFLOAD_TNL_PPTP;
++
++ return 0;
++}
++#endif /* IS_ENABLED(CONFIG_NF_FLOW_TABLE) */
++
+ static int pptp_xmit(struct ppp_channel *chan, struct sk_buff *skb)
+ {
+ struct sock *sk = (struct sock *) chan->private;
+@@ -140,6 +164,7 @@ static int pptp_xmit(struct ppp_channel
+ int islcp;
+ int len;
+ unsigned char *data;
++ u32 seq_sent_hw;
+ __u32 seq_recv;
+
+
+@@ -204,7 +229,14 @@ static int pptp_xmit(struct ppp_channel
+ hdr->gre_hd.protocol = GRE_PROTO_PPP;
+ hdr->call_id = htons(opt->dst_addr.call_id);
+
+- hdr->seq = htonl(++opt->seq_sent);
++ if (mtk_pptp_seq_next && !mtk_pptp_seq_next(opt->dst_addr.call_id,
++ &seq_sent_hw)) {
++ opt->seq_sent = seq_sent_hw;
++ hdr->seq = htonl(opt->seq_sent);
++ } else {
++ hdr->seq = htonl(++opt->seq_sent);
++ }
++
+ if (opt->ack_sent != seq_recv) {
+ /* send ack with this message */
+ hdr->gre_hd.flags |= GRE_ACK;
+@@ -598,6 +630,9 @@ static int pptp_ppp_ioctl(struct ppp_cha
+ static const struct ppp_channel_ops pptp_chan_ops = {
+ .start_xmit = pptp_xmit,
+ .ioctl = pptp_ppp_ioctl,
++#if IS_ENABLED(CONFIG_NF_FLOW_TABLE)
++ .flow_offload_check = pptp_flow_offload_check,
++#endif /* IS_ENABLED(CONFIG_NF_FLOW_TABLE) */
+ };
+
+ static struct proto pptp_sk_proto __read_mostly = {
+--- a/include/net/pptp.h
++++ b/include/net/pptp.h
+@@ -2,6 +2,8 @@
+ #ifndef _NET_PPTP_H
+ #define _NET_PPTP_H
+
++#include <net/gre.h>
++
+ #define PPP_LCP_ECHOREQ 0x09
+ #define PPP_LCP_ECHOREP 0x0A
+ #define SC_RCV_BITS (SC_RCV_B7_1|SC_RCV_B7_0|SC_RCV_ODDP|SC_RCV_EVNP)
+@@ -20,5 +22,7 @@ struct pptp_gre_header {
+ __be32 ack;
+ } __packed;
+
++/* symbol exported from linux kernel driver/net/ppp/pptp.c */
++extern int (*mtk_pptp_seq_next)(uint16_t call_id, uint32_t *val);
+
+ #endif