DHDAXCW-Rockchip-OpenWrt/package/kernel/mac80211/patches/subsys/999-mac80211-add-option-for-NSS-support.patch

--- a/net/mac80211/Kconfig	2019-01-03 21:03:17.839001000 +0800
+++ b/net/mac80211/Kconfig	2019-01-03 21:04:43.931001000 +0800
@@ -16,6 +16,13 @@
 
 if MAC80211 != n
 
+config MAC80211_NSS_SUPPORT
+	bool "Enable NSS support for IPQ platform"
+	default n
+	---help---
+	This option enables support for NSS in boards
+	like AP148.
+
 config MAC80211_HAS_RC
 	bool
 
--- a/local-symbols	2019-01-03 21:24:00.087001000 +0800
+++ b/local-symbols	2019-01-03 21:24:56.535001000 +0800
@@ -47,6 +47,7 @@ LIB80211_CRYPT_CCMP=
 LIB80211_CRYPT_TKIP=
 LIB80211_DEBUG=
 MAC80211=
+MAC80211_NSS_SUPPORT=
 MAC80211_HAS_RC=
 MAC80211_RC_MINSTREL=
 MAC80211_RC_DEFAULT_MINSTREL=
--- a/net/mac80211/ieee80211_i.h	2019-01-03 21:04:57.527001000 +0800
+++ b/net/mac80211/ieee80211_i.h	2019-01-03 21:05:44.827001000 +0800
@@ -35,6 +35,10 @@
 
 extern const struct cfg80211_ops mac80211_config_ops;
 
+#ifdef CPTCFG_MAC80211_NSS_SUPPORT
+#include <nss_api_if.h>
+#endif
+
 struct ieee80211_local;
 
 /* Maximum number of broadcast/multicast frames to buffer when some of the
@@ -988,6 +992,10 @@ struct ieee80211_sub_if_data {
 
 	bool hw_80211_encap;
 
+#ifdef CPTCFG_MAC80211_NSS_SUPPORT
+	struct nss_virt_if_handle *nssctx;
+#endif
+
 	/* must be last, dynamically sized area in this! */
 	struct ieee80211_vif vif;
 };
--- a/net/mac80211/iface.c	2019-01-03 21:06:00.007001000 +0800
+++ b/net/mac80211/iface.c	2019-01-03 21:08:49.535001000 +0800
@@ -15,6 +15,7 @@
 #include <linux/if_arp.h>
 #include <linux/netdevice.h>
 #include <linux/rtnetlink.h>
+#include <linux/module.h>
 #include <net/mac80211.h>
 #include <net/ieee80211_radiotap.h>
 #include "ieee80211_i.h"
@@ -26,6 +27,12 @@
 #include "wme.h"
 #include "rate.h"
 
+#ifdef CPTCFG_MAC80211_NSS_SUPPORT
+bool is_nss_enable = true;
+module_param(is_nss_enable, bool, 0644);
+MODULE_PARM_DESC(is_nss_enable, "NSS enable module param");
+#endif
+
 /**
  * DOC: Interface list locking
  *
@@ -645,6 +652,13 @@
 {
 	struct ieee80211_sub_if_data *sdata = IEEE80211_DEV_TO_SUB_IF(dev);
 
+#ifdef CPTCFG_MAC80211_NSS_SUPPORT
+	if (sdata->nssctx) {
+		nss_virt_if_destroy_sync(sdata->nssctx);
+		sdata_info(sdata, "Destroyed NSS virtual interface\n");
+	}
+#endif
+
 	ieee80211_do_stop(sdata, true);
 
 	return 0;
@@ -1343,6 +1357,18 @@
 
 	ieee80211_recalc_ps(local);
 
+#ifdef CPTCFG_MAC80211_NSS_SUPPORT
+	if (is_nss_enable) {
+		sdata->nssctx = nss_virt_if_create_sync(dev);
+		if (sdata->nssctx)
+			sdata_info(sdata, "Created a NSS virtual interface\n");
+		else
+			sdata_err(sdata, "Failed to create a NSS virtual interface\n");
+	} else {
+		sdata->nssctx = NULL;
+	}
+#endif
+
 	if (sdata->vif.type == NL80211_IFTYPE_MONITOR ||
 	    sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
 	    local->ops->wake_tx_queue) {
--- a/net/mac80211/rx.c	2019-01-03 21:09:29.503001000 +0800
+++ b/net/mac80211/rx.c	2019-01-03 21:17:42.463001000 +0800
@@ -32,6 +32,10 @@
 #include "wme.h"
 #include "rate.h"
 
+#ifdef CPTCFG_MAC80211_NSS_SUPPORT
+extern bool is_nss_enable;
+#endif
+
 static inline void ieee80211_rx_stats(struct net_device *dev, u32 len)
 {
 	struct pcpu_sw_netstats *tstats = this_cpu_ptr(netdev_tstats(dev));
@@ -42,6 +46,63 @@
 	u64_stats_update_end(&tstats->syncp);
 }
 
+#ifdef CPTCFG_MAC80211_NSS_SUPPORT
+
+#define case_rtn_string(val) case val: return #val
+
+static const char *nss_tx_status_str(nss_tx_status_t status)
+{
+	switch (status) {
+		case_rtn_string(NSS_TX_SUCCESS);
+		case_rtn_string(NSS_TX_FAILURE);
+		case_rtn_string(NSS_TX_FAILURE_QUEUE);
+		case_rtn_string(NSS_TX_FAILURE_NOT_READY);
+		case_rtn_string(NSS_TX_FAILURE_TOO_LARGE);
+		case_rtn_string(NSS_TX_FAILURE_TOO_SHORT);
+		case_rtn_string(NSS_TX_FAILURE_NOT_SUPPORTED);
+		case_rtn_string(NSS_TX_FAILURE_BAD_PARAM);
+		case_rtn_string(NSS_TX_FAILURE_NOT_ENABLED);
+		case_rtn_string(NSS_TX_FAILURE_SYNC_BAD_PARAM);
+		case_rtn_string(NSS_TX_FAILURE_SYNC_TIMEOUT);
+		case_rtn_string(NSS_TX_FAILURE_SYNC_FW_ERR);
+	default:
+		return "Unknown NSS TX status";
+	}
+}
+
+static void netif_rx_nss(struct ieee80211_sub_if_data *sdata,
+			 struct sk_buff *skb)
+{
+	int ret;
+	int push_mac_header = 0;
+
+	if (!sdata->nssctx)
+		goto out;
+
+	if (unlikely((skb->data - skb_mac_header(skb)) == ETH_HLEN)) {
+		skb_push(skb, ETH_HLEN);
+		push_mac_header = 1;
+	}
+
+	ret = nss_virt_if_tx_buf(sdata->nssctx, skb);
+	if (ret) {
+		if (net_ratelimit()) {
+			sdata_err(sdata, "NSS TX failed with error[%d]: %s\n", ret,
+				  nss_tx_status_str(ret));
+		}
+		goto out;
+	}
+
+	return;
+out:
+	if (unlikely(push_mac_header)) {
+		skb_pull(skb, ETH_HLEN);
+	}
+	netif_receive_skb(skb);
+}
+#endif
+
+
 /*
  * monitor mode reception
  *
@@ -2604,6 +2665,16 @@
 			ether_addr_copy(ehdr->h_dest, sdata->vif.addr);
 
 		/* deliver to local stack */
+#ifdef CPTCFG_MAC80211_NSS_SUPPORT
+		if (likely(is_nss_enable))
+			netif_rx_nss(sdata, skb);
+		else {
+			if (rx->napi)
+				napi_gro_receive(rx->napi, skb);
+			else
+				netif_receive_skb(skb);
+		}
+#else
 		if (rx->list)
 #if LINUX_VERSION_IS_GEQ(4,19,0)
 			list_add_tail(&skb->list, rx->list);
@@ -2612,6 +2683,7 @@
 #endif
 		else
 			netif_receive_skb(skb);
+#endif
 	}
 }
 
@@ -4461,6 +4533,16 @@
 	/* deliver to local stack */
 	skb->protocol = eth_type_trans(skb, fast_rx->dev);
 	memset(skb->cb, 0, sizeof(skb->cb));
+#ifdef CPTCFG_MAC80211_NSS_SUPPORT
+	if (likely(is_nss_enable))
+		netif_rx_nss(rx->sdata, skb);
+	else {
+		if (rx->napi)
+			napi_gro_receive(rx->napi, skb);
+		else
+			netif_receive_skb(skb);
+	}
+#else
 	if (rx->list)
 #if LINUX_VERSION_IS_GEQ(4,19,0)
 		list_add_tail(&skb->list, rx->list);
@@ -4469,7 +4551,7 @@
 #endif
 	else
 		netif_receive_skb(skb);
-
+#endif
 }
 
 static bool ieee80211_invoke_fast_rx(struct ieee80211_rx_data *rx,