net: airoha: Link the gdm port to the selected qdma controller

Link the running gdm port to the qdma controller used to connect with
the CPU. Moreover, load all QDMA controllers available on EN7581 SoC.
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Link: https://patch.msgid.link/95b515df34ba4727f7ae5b14a1d0462cceec84ff.1722522582.git.lorenzo@kernel.orgSigned-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/ethernet/mediatek/airoha_eth.c

@@ -18,7 +18,7 @@
 #include <uapi/linux/ppp_defs.h>
 
 #define AIROHA_MAX_NUM_GDM_PORTS	1
-#define AIROHA_MAX_NUM_QDMA		1
+#define AIROHA_MAX_NUM_QDMA		2
 #define AIROHA_MAX_NUM_RSTS		3
 #define AIROHA_MAX_NUM_XSI_RSTS		5
 #define AIROHA_MAX_MTU			2000
@@ -805,8 +805,8 @@ struct airoha_qdma {
 };
 
 struct airoha_gdm_port {
+	struct airoha_qdma *qdma;
 	struct net_device *dev;
-	struct airoha_eth *eth;
 	int id;
 
 	struct airoha_hw_stats stats;
@@ -2138,7 +2138,7 @@ static void airoha_qdma_start_napi(struct airoha_qdma *qdma)
 
 static void airoha_update_hw_stats(struct airoha_gdm_port *port)
 {
-	struct airoha_eth *eth = port->eth;
+	struct airoha_eth *eth = port->qdma->eth;
 	u32 val, i = 0;
 
 	spin_lock(&port->stats.lock);
@@ -2283,22 +2283,22 @@ static void airoha_update_hw_stats(struct airoha_gdm_port *port)
 static int airoha_dev_open(struct net_device *dev)
 {
 	struct airoha_gdm_port *port = netdev_priv(dev);
-	struct airoha_eth *eth = port->eth;
+	struct airoha_qdma *qdma = port->qdma;
 	int err;
 
 	netif_tx_start_all_queues(dev);
-	err = airoha_set_gdm_ports(eth, true);
+	err = airoha_set_gdm_ports(qdma->eth, true);
 	if (err)
 		return err;
 
 	if (netdev_uses_dsa(dev))
-		airoha_fe_set(eth, REG_GDM_INGRESS_CFG(port->id),
+		airoha_fe_set(qdma->eth, REG_GDM_INGRESS_CFG(port->id),
 			      GDM_STAG_EN_MASK);
 	else
-		airoha_fe_clear(eth, REG_GDM_INGRESS_CFG(port->id),
+		airoha_fe_clear(qdma->eth, REG_GDM_INGRESS_CFG(port->id),
 				GDM_STAG_EN_MASK);
 
-	airoha_qdma_set(&eth->qdma[0], REG_QDMA_GLOBAL_CFG,
+	airoha_qdma_set(qdma, REG_QDMA_GLOBAL_CFG,
 			GLOBAL_CFG_TX_DMA_EN_MASK |
 			GLOBAL_CFG_RX_DMA_EN_MASK);
 
@@ -2308,15 +2308,15 @@ static int airoha_dev_open(struct net_device *dev)
 static int airoha_dev_stop(struct net_device *dev)
 {
 	struct airoha_gdm_port *port = netdev_priv(dev);
-	struct airoha_eth *eth = port->eth;
+	struct airoha_qdma *qdma = port->qdma;
 	int err;
 
 	netif_tx_disable(dev);
-	err = airoha_set_gdm_ports(eth, false);
+	err = airoha_set_gdm_ports(qdma->eth, false);
 	if (err)
 		return err;
 
-	airoha_qdma_clear(&eth->qdma[0], REG_QDMA_GLOBAL_CFG,
+	airoha_qdma_clear(qdma, REG_QDMA_GLOBAL_CFG,
 			  GLOBAL_CFG_TX_DMA_EN_MASK |
 			  GLOBAL_CFG_RX_DMA_EN_MASK);
 
@@ -2332,7 +2332,7 @@ static int airoha_dev_set_macaddr(struct net_device *dev, void *p)
 	if (err)
 		return err;
 
-	airoha_set_macaddr(port->eth, dev->dev_addr);
+	airoha_set_macaddr(port->qdma->eth, dev->dev_addr);
 
 	return 0;
 }
@@ -2341,7 +2341,7 @@ static int airoha_dev_init(struct net_device *dev)
 {
 	struct airoha_gdm_port *port = netdev_priv(dev);
 
-	airoha_set_macaddr(port->eth, dev->dev_addr);
+	airoha_set_macaddr(port->qdma->eth, dev->dev_addr);
 
 	return 0;
 }
@@ -2375,10 +2375,9 @@ static netdev_tx_t airoha_dev_xmit(struct sk_buff *skb,
 	struct airoha_gdm_port *port = netdev_priv(dev);
 	u32 msg0 = 0, msg1, len = skb_headlen(skb);
 	int i, qid = skb_get_queue_mapping(skb);
-	struct airoha_eth *eth = port->eth;
+	struct airoha_qdma *qdma = port->qdma;
 	u32 nr_frags = 1 + sinfo->nr_frags;
 	struct netdev_queue *txq;
-	struct airoha_qdma *qdma;
 	struct airoha_queue *q;
 	void *data = skb->data;
 	u16 index;
@@ -2406,7 +2405,6 @@ static netdev_tx_t airoha_dev_xmit(struct sk_buff *skb,
 	msg1 = FIELD_PREP(QDMA_ETH_TXMSG_FPORT_MASK, fport) |
 	       FIELD_PREP(QDMA_ETH_TXMSG_METER_MASK, 0x7f);
 
-	qdma = &eth->qdma[0];
 	q = &qdma->q_tx[qid];
 	if (WARN_ON_ONCE(!q->ndesc))
 		goto error;
@@ -2489,7 +2487,7 @@ static void airoha_ethtool_get_drvinfo(struct net_device *dev,
 				       struct ethtool_drvinfo *info)
 {
 	struct airoha_gdm_port *port = netdev_priv(dev);
-	struct airoha_eth *eth = port->eth;
+	struct airoha_eth *eth = port->qdma->eth;
 
 	strscpy(info->driver, eth->dev->driver->name, sizeof(info->driver));
 	strscpy(info->bus_info, dev_name(eth->dev), sizeof(info->bus_info));
@@ -2570,6 +2568,7 @@ static int airoha_alloc_gdm_port(struct airoha_eth *eth, struct device_node *np)
 {
 	const __be32 *id_ptr = of_get_property(np, "reg", NULL);
 	struct airoha_gdm_port *port;
+	struct airoha_qdma *qdma;
 	struct net_device *dev;
 	int err, index;
 	u32 id;
@@ -2599,6 +2598,7 @@ static int airoha_alloc_gdm_port(struct airoha_eth *eth, struct device_node *np)
 		return -ENOMEM;
 	}
 
+	qdma = &eth->qdma[index % AIROHA_MAX_NUM_QDMA];
 	dev->netdev_ops = &airoha_netdev_ops;
 	dev->ethtool_ops = &airoha_ethtool_ops;
 	dev->max_mtu = AIROHA_MAX_MTU;
@@ -2608,6 +2608,7 @@ static int airoha_alloc_gdm_port(struct airoha_eth *eth, struct device_node *np)
 			   NETIF_F_SG | NETIF_F_TSO;
 	dev->features |= dev->hw_features;
 	dev->dev.of_node = np;
+	dev->irq = qdma->irq;
 	SET_NETDEV_DEV(dev, eth->dev);
 
 	err = of_get_ethdev_address(np, dev);
@@ -2623,8 +2624,8 @@ static int airoha_alloc_gdm_port(struct airoha_eth *eth, struct device_node *np)
 	port = netdev_priv(dev);
 	u64_stats_init(&port->stats.syncp);
 	spin_lock_init(&port->stats.lock);
+	port->qdma = qdma;
 	port->dev = dev;
-	port->eth = eth;
 	port->id = id;
 	eth->ports[index] = port;