openwrt/package/kernel/lantiq/vrx518_tc/patches/202-napi.patch

--- a/dcdp/platform/sw_plat.c
+++ b/dcdp/platform/sw_plat.c
@@ -208,6 +208,8 @@ struct plat_priv {
 	struct tc_req req_work;
 	struct aca_ring_grp soc_rings;
 	struct net_device *netdev;
+	struct napi_struct *napi_tx;
+	struct napi_struct *napi_rx;
 	DECLARE_HASHTABLE(mem_map, 8);
 };
 
@@ -472,7 +474,7 @@ err2:
 	return -1;
 }
 
-static void txout_action(struct tc_priv *priv, struct aca_ring *txout)
+static int txout_action(struct tc_priv *priv, struct aca_ring *txout, int budget)
 {
 	struct aca_ring *txin = &g_plat_priv->soc_rings.txin;
 	struct tx_list *txlist = &g_plat_priv->soc_rings.txlist;
@@ -490,7 +492,10 @@ static void txout_action(struct tc_priv
 		spin_lock_irqsave(&tx_spinlock, flags);
 	}
 
-	for (i = 0; i < txout->dnum; i++) {
+	if (budget == 0 || budget > txout->dnum)
+		budget = txout->dnum;
+
+	for (i = 0; i < budget; i++) {
 		desc = txout->dbase_mem;
 		desc += txout->idx;
 
@@ -540,6 +545,8 @@ static void txout_action(struct tc_priv
 	if (cnt && g_plat_priv->netdev && netif_queue_stopped(g_plat_priv->netdev)) {
 		netif_wake_queue(g_plat_priv->netdev);
 	}
+
+	return cnt;
 }
 
 static void rxin_action(struct tc_priv *priv,
@@ -549,7 +556,7 @@ static void rxin_action(struct tc_priv *
 	writel(cnt, rxin->umt_dst);
 }
 
-static int rxout_action(struct tc_priv *priv, struct aca_ring *rxout)
+static int rxout_action(struct tc_priv *priv, struct aca_ring *rxout, int budget)
 {
 	struct device *pdev = priv->ep_dev[0].dev;
 	int i, cnt;
@@ -559,8 +566,11 @@ static int rxout_action(struct tc_priv *
 	size_t len;
 	struct sk_buff *skb;
 
+	if (budget == 0 || budget > rxout->dnum)
+		budget = rxout->dnum;
+
 	cnt = 0;
-	for (i = 0; i < rxout->dnum; i++) {
+	for (i = 0; i < budget; i++) {
 		desc = rxout->dbase_mem;
 		desc += rxout->idx;
 
@@ -593,14 +603,30 @@ static int rxout_action(struct tc_priv *
 		ring_idx_inc(rxout);
 	}
 
-	if (!cnt)
-		tc_err(priv, MSG_RX, "RXOUT spurious interrupt\n");
-	else
+	if (cnt)
 		writel(cnt, rxout->umt_dst+0x28); // RXOUT_HD_ACCUM_SUB instead of RXOUT_HD_ACCUM_ADD
 
 	return cnt;
 }
 
+static int plat_txout_napi(struct napi_struct *napi, int budget)
+{
+	struct plat_priv *priv = g_plat_priv;
+	struct tc_priv *tcpriv = plat_to_tcpriv();
+	struct aca_ring *txout = &priv->soc_rings.txout;
+	struct dc_ep_dev *ep_dev = &tcpriv->ep_dev[txout->ep_dev_idx];
+	int cnt;
+
+	cnt = txout_action(tcpriv, txout, budget);
+
+	if (cnt < budget) {
+		if (napi_complete_done(napi, cnt))
+			ep_dev->hw_ops->icu_en(ep_dev, ACA_HOSTIF_TX);
+	}
+
+	return cnt;
+}
+
 static void plat_txout_tasklet(unsigned long arg)
 {
 	struct plat_priv *priv = g_plat_priv;
@@ -608,12 +634,33 @@ static void plat_txout_tasklet(unsigned
 	struct aca_ring *txout = &priv->soc_rings.txout;
 	struct dc_ep_dev *ep_dev = &tcpriv->ep_dev[txout->ep_dev_idx];
 
-	txout_action(tcpriv, txout);
+	txout_action(tcpriv, txout, 0);
 
 	/* Enable interrupt */
 	ep_dev->hw_ops->icu_en(ep_dev, ACA_HOSTIF_TX);
 }
 
+static int plat_rxout_napi(struct napi_struct *napi, int budget)
+{
+	struct plat_priv *priv = g_plat_priv;
+	struct tc_priv *tcpriv = plat_to_tcpriv();
+	struct aca_ring *rxout = &priv->soc_rings.rxout;
+	struct aca_ring *rxin = &priv->soc_rings.rxin;
+	struct dc_ep_dev *ep_dev = &tcpriv->ep_dev[rxout->ep_dev_idx];
+	int cnt;
+
+	cnt = rxout_action(tcpriv, rxout, budget);
+	if (cnt)
+		rxin_action(tcpriv, rxin, DMA_PACKET_SZ, cnt);
+
+	if (cnt < budget) {
+		if (napi_complete_done(napi, cnt))
+			ep_dev->hw_ops->icu_en(ep_dev, ACA_HOSTIF_RX);
+	}
+
+	return cnt;
+}
+
 static void plat_rxout_tasklet(unsigned long arg)
 {
 	struct plat_priv *priv = g_plat_priv;
@@ -623,7 +670,7 @@ static void plat_rxout_tasklet(unsigned
 	struct dc_ep_dev *ep_dev = &tcpriv->ep_dev[rxout->ep_dev_idx];
 	int cnt;
 
-	cnt = rxout_action(tcpriv, rxout);
+	cnt = rxout_action(tcpriv, rxout, 0);
 	if (cnt)
 		rxin_action(tcpriv, rxin, DMA_PACKET_SZ, cnt);
 
@@ -783,11 +830,22 @@ static irqreturn_t aca_rx_irq_handler(in
 {
 	struct dc_ep_dev *ep_dev = dev_id;
 
-	/* Disable IRQ in IMCU */
-	ep_dev->hw_ops->icu_mask(ep_dev, ACA_HOSTIF_RX);
+	if (g_plat_priv->napi_rx) {
+
+		if (napi_schedule_prep(g_plat_priv->napi_rx)) {
+			ep_dev->hw_ops->icu_mask(ep_dev, ACA_HOSTIF_RX);
+			__napi_schedule(g_plat_priv->napi_rx);
+		}
+
+	} else {
+
+		/* Disable IRQ in IMCU */
+		ep_dev->hw_ops->icu_mask(ep_dev, ACA_HOSTIF_RX);
 
-	/* Start tasklet */
-	tasklet_schedule(&rxout_task);
+		/* Start tasklet */
+		tasklet_schedule(&rxout_task);
+
+	}
 
 	return IRQ_HANDLED;
 }
@@ -796,15 +854,62 @@ static irqreturn_t aca_tx_irq_handler(in
 {
 	struct dc_ep_dev *ep_dev = dev_id;
 
-	/* Disable IRQ in IMCU */
-	ep_dev->hw_ops->icu_mask(ep_dev, ACA_HOSTIF_TX);
+	if (g_plat_priv->napi_tx) {
 
-	/* Start tasklet */
-	tasklet_schedule(&txout_task);
+		if (napi_schedule_prep(g_plat_priv->napi_tx)) {
+			ep_dev->hw_ops->icu_mask(ep_dev, ACA_HOSTIF_TX);
+			__napi_schedule(g_plat_priv->napi_tx);
+		}
+
+	} else {
+
+		/* Disable IRQ in IMCU */
+		ep_dev->hw_ops->icu_mask(ep_dev, ACA_HOSTIF_TX);
+
+		/* Start tasklet */
+		tasklet_schedule(&txout_task);
+
+	}
 
 	return IRQ_HANDLED;
 }
 
+static void plat_net_open(void)
+{
+	struct plat_priv *priv = g_plat_priv;
+	struct tc_priv *tcpriv = plat_to_tcpriv();
+	struct aca_ring *rxout = &priv->soc_rings.rxout;
+	struct aca_ring *txout = &priv->soc_rings.txout;
+	struct dc_ep_dev *ep_dev_rx = &tcpriv->ep_dev[rxout->ep_dev_idx];
+	struct dc_ep_dev *ep_dev_tx = &tcpriv->ep_dev[txout->ep_dev_idx];
+
+	if (priv->napi_rx)
+		napi_enable(priv->napi_rx);
+	ep_dev_rx->hw_ops->icu_en(ep_dev_rx, ACA_HOSTIF_RX);
+
+	if (priv->napi_tx)
+		napi_enable(priv->napi_tx);
+	ep_dev_tx->hw_ops->icu_en(ep_dev_tx, ACA_HOSTIF_TX);
+}
+
+static void plat_net_stop(void)
+{
+	struct plat_priv *priv = g_plat_priv;
+	struct tc_priv *tcpriv = plat_to_tcpriv();
+	struct aca_ring *rxout = &priv->soc_rings.rxout;
+	struct aca_ring *txout = &priv->soc_rings.txout;
+	struct dc_ep_dev *ep_dev_rx = &tcpriv->ep_dev[rxout->ep_dev_idx];
+	struct dc_ep_dev *ep_dev_tx = &tcpriv->ep_dev[txout->ep_dev_idx];
+
+	if (priv->napi_tx)
+		napi_disable(priv->napi_tx);
+	ep_dev_tx->hw_ops->icu_mask(ep_dev_tx, ACA_HOSTIF_TX);
+
+	if (priv->napi_rx)
+		napi_disable(priv->napi_rx);
+	ep_dev_rx->hw_ops->icu_mask(ep_dev_rx, ACA_HOSTIF_RX);
+}
+
 static void plat_irq_init(struct tc_priv *priv, const char *dev_name)
 {
 	int ret;
@@ -988,17 +1093,49 @@ static int plat_soc_cfg_get(struct soc_c
 }
 
 static int plat_open(struct net_device *pdev, const char *dev_name,
+		struct napi_struct *napi_tx, struct napi_struct *napi_rx,
 		int id, int flag)
 {
+	struct tc_priv *priv = g_plat_priv->tc_priv;
+	int i;
+
+	for (i = 0; i < EP_MAX_NUM && i < priv->ep_num; i++) {
+		disable_irq(priv->ep_dev[i].aca_rx_irq);
+		disable_irq(priv->ep_dev[i].aca_tx_irq);
+	}
+
 	g_plat_priv->netdev = pdev;
+	g_plat_priv->napi_tx = napi_tx;
+	g_plat_priv->napi_rx = napi_rx;
+
+	for (i = 0; i < EP_MAX_NUM && i < priv->ep_num; i++) {
+		enable_irq(priv->ep_dev[i].aca_rx_irq);
+		enable_irq(priv->ep_dev[i].aca_tx_irq);
+	}
 
 	return 0;
 }
 
 static void plat_close(struct net_device *pdev, const char *dev_name,
+		struct napi_struct *napi_tx, struct napi_struct *napi_rx,
 		int flag)
 {
+	struct tc_priv *priv = g_plat_priv->tc_priv;
+	int i;
+
+	for (i = 0; i < EP_MAX_NUM && i < priv->ep_num; i++) {
+		disable_irq(priv->ep_dev[i].aca_rx_irq);
+		disable_irq(priv->ep_dev[i].aca_tx_irq);
+	}
+
 	g_plat_priv->netdev = NULL;
+	g_plat_priv->napi_tx = NULL;
+	g_plat_priv->napi_rx = NULL;
+
+	for (i = 0; i < EP_MAX_NUM && i < priv->ep_num; i++) {
+		enable_irq(priv->ep_dev[i].aca_rx_irq);
+		enable_irq(priv->ep_dev[i].aca_tx_irq);
+	}
 
 	return;
 }
@@ -1084,6 +1221,10 @@ static void plat_tc_ops_setup(struct tc_
 	priv->tc_ops.free = plat_mem_free;
 	priv->tc_ops.dev_reg = plat_open;
 	priv->tc_ops.dev_unreg = plat_close;
+	priv->tc_ops.net_open = plat_net_open;
+	priv->tc_ops.net_stop = plat_net_stop;
+	priv->tc_ops.napi_tx = plat_txout_napi;
+	priv->tc_ops.napi_rx = plat_rxout_napi;
 	priv->tc_ops.umt_init = plat_umt_init;
 	priv->tc_ops.umt_exit = plat_umt_exit;
 	priv->tc_ops.umt_start = plat_umt_start;
--- a/dcdp/atm_tc.c
+++ b/dcdp/atm_tc.c
@@ -3650,7 +3650,7 @@ static void atm_aca_ring_config_init(str
 static int atm_ring_init(struct atm_priv *priv)
 {
 	atm_aca_ring_config_init(priv);
-	return priv->tc_priv->tc_ops.dev_reg(NULL, g_atm_dev_name, 0, 0);
+	return priv->tc_priv->tc_ops.dev_reg(NULL, g_atm_dev_name, NULL, NULL, 0, 0);
 }
 
 static int atm_init(struct tc_priv *tcpriv, u32 ep_id)
@@ -4020,7 +4020,7 @@ void atm_tc_unload(void)
 	/* unregister device */
 	if (priv->tc_priv->tc_ops.dev_unreg != NULL)
 		priv->tc_priv->tc_ops.dev_unreg(NULL,
-			g_atm_dev_name, 0);
+			g_atm_dev_name, NULL, NULL, 0);
 
 	/* atm_dev_deinit(priv); */
 	/* modem module power off */
--- a/dcdp/inc/tc_main.h
+++ b/dcdp/inc/tc_main.h
@@ -209,9 +209,15 @@ struct tc_hw_ops {
 	void (*subif_unreg)(struct net_device *pdev, const char *dev_name,
 			int subif_id, int flag);
 	int (*dev_reg)(struct net_device *pdev, const char *dev_name,
+			struct napi_struct *napi_tx, struct napi_struct *napi_rx,
 			int id, int flag);
 	void (*dev_unreg)(struct net_device *pdev, const char *dev_name,
+			struct napi_struct *napi_tx, struct napi_struct *napi_rx,
 			int flag);
+	void (*net_open)(void);
+	void (*net_stop)(void);
+	int (*napi_tx)(struct napi_struct *napi, int budget);
+	int (*napi_rx)(struct napi_struct *napi, int budget);
 
 	/*umt init/exit including the corresponding DMA init/exit */
 	int (*umt_init)(u32 umt_id, u32 umt_period, u32 umt_dst);
--- a/dcdp/ptm_tc.c
+++ b/dcdp/ptm_tc.c
@@ -146,7 +146,11 @@ static int ptm_open(struct net_device *d
 	struct ptm_priv *ptm_tc = netdev_priv(dev);
 
 	tc_info(ptm_tc->tc_priv, MSG_EVENT, "ptm open\n");
+
+	ptm_tc->tc_priv->tc_ops.net_open();
+
 	netif_tx_start_all_queues(dev);
+
 #ifdef CONFIG_SOC_TYPE_XWAY
 	xet_phy_wan_port(7, NULL, 1, 1);
 	if (ppa_hook_ppa_phys_port_add_fn)
@@ -163,7 +167,11 @@ static int ptm_stop(struct net_device *d
 	struct ptm_priv *ptm_tc = netdev_priv(dev);
 
 	tc_info(ptm_tc->tc_priv, MSG_EVENT, "ptm stop\n");
+
 	netif_tx_stop_all_queues(dev);
+
+	ptm_tc->tc_priv->tc_ops.net_stop();
+
 #ifdef CONFIG_SOC_TYPE_XWAY
     if (ppa_drv_datapath_mac_entry_setting)
         ppa_drv_datapath_mac_entry_setting(dev->dev_addr, 0, 6, 10, 1, 2);
@@ -564,7 +572,7 @@ static void ptm_rx(struct net_device *de
 	ptm_tc->stats64.rx_packets++;
 	ptm_tc->stats64.rx_bytes += skb->len;
 
-	if (netif_rx(skb) == NET_RX_DROP)
+	if (netif_receive_skb(skb) == NET_RX_DROP)
 		ptm_tc->stats64.rx_dropped++;
 
 	return;
@@ -664,6 +672,14 @@ static int ptm_dev_init(struct tc_priv *
 	memcpy(ptm_tc->outq_map, def_outq_map, sizeof(def_outq_map));
 	SET_NETDEV_DEV(ptm_tc->dev, tc_priv->ep_dev[id].dev);
 
+#if (LINUX_VERSION_CODE >= KERNEL_VERSION(5,17,0))
+	netif_napi_add(ptm_tc->dev, &ptm_tc->napi_rx, tc_priv->tc_ops.napi_rx);
+	netif_napi_add_tx(ptm_tc->dev, &ptm_tc->napi_tx, tc_priv->tc_ops.napi_tx);
+#else
+	netif_napi_add(ptm_tc->dev, &ptm_tc->napi_rx, tc_priv->tc_ops.napi_rx, NAPI_POLL_WEIGHT);
+	netif_tx_napi_add(ptm_tc->dev, &ptm_tc->napi_tx, tc_priv->tc_ops.napi_tx, NAPI_POLL_WEIGHT);
+
+#endif
 	err = register_netdev(ptm_tc->dev);
 	if (err)
 		goto err1;
@@ -2618,7 +2634,9 @@ static int ptm_ring_init(struct ptm_ep_p
 {
 	ptm_aca_ring_config_init(priv, id, bonding);
 	return priv->tc_priv->tc_ops.dev_reg(priv->ptm_tc->dev,
-		priv->ptm_tc->dev->name, id, bonding);
+		priv->ptm_tc->dev->name,
+		&priv->ptm_tc->napi_tx, &priv->ptm_tc->napi_rx,
+		id, bonding);
 }
 
 /**
@@ -2973,7 +2991,9 @@ void ptm_tc_unload(enum dsl_tc_mode tc_m
 	/* unregister device */
 	if (ptm_tc->tc_priv->tc_ops.dev_unreg != NULL)
 		ptm_tc->tc_priv->tc_ops.dev_unreg(ptm_tc->dev,
-			ptm_tc->dev->name, 0);
+			ptm_tc->dev->name,
+			&priv->ptm_tc->napi_tx, &priv->ptm_tc->napi_rx,
+			0);
 
 	/* remove PTM callback function */
 	ptm_cb_setup(ptm_tc, 0);
@@ -2991,6 +3011,10 @@ void ptm_exit(void)
 
 	if (!priv)
 		return;
+
+	netif_napi_del(&priv->napi_tx);
+	netif_napi_del(&priv->napi_rx);
+
 	unregister_netdev(priv->dev);
 	free_netdev(priv->dev);
 
--- a/dcdp/inc/ptm_tc.h
+++ b/dcdp/inc/ptm_tc.h
@@ -119,6 +119,8 @@ struct ptm_priv {
 	u32 ep_id;
 	struct ppe_fw fw;
 	struct net_device *dev;
+	struct napi_struct napi_tx;
+	struct napi_struct napi_rx;
 	spinlock_t ptm_lock;
 	struct rtnl_link_stats64 stats64;
 	int subif_id;