net: airoha: Rely on net_device pointer in HTB callbacks

Remove airoha_gdm_port dependency in HTB tc callback signatures and rely
on net_device pointer instead. Please note this patch does not introduce
any logical change and it is a preliminary patch in order to support
multiple net_devices connected to the same GDM3 or GDM4 port via an
external hw arbiter.

Tested-by: Xuegang Lu <xuegang.lu@airoha.com>
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Link: https://patch.msgid.link/20260412-airoha-multi-serdes-preliminary-patch-v1-2-08d5b670ca8f@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

1 files changed, 24 insertions, 21 deletions

diff --git a/drivers/net/ethernet/airoha/airoha_eth.c b/drivers/net/ethernet/airoha/airoha_eth.c
index a98512e963b5..c2b5fcffce82 100644
--- a/drivers/net/ethernet/airoha/airoha_eth.c
+++ b/drivers/net/ethernet/airoha/airoha_eth.c
@@ -2492,10 +2492,11 @@ static int airoha_qdma_set_trtcm_token_bucket(struct airoha_qdma *qdma,
 					   mode, val);
 }
 
-static int airoha_qdma_set_tx_rate_limit(struct airoha_gdm_port *port,
+static int airoha_qdma_set_tx_rate_limit(struct net_device *dev,
 					 int channel, u32 rate,
 					 u32 bucket_size)
 {
+	struct airoha_gdm_port *port = netdev_priv(dev);
 	int i, err;
 
 	for (i = 0; i <= TRTCM_PEAK_MODE; i++) {
@@ -2515,21 +2516,20 @@ static int airoha_qdma_set_tx_rate_limit(struct airoha_gdm_port *port,
 	return 0;
 }
 
-static int airoha_tc_htb_alloc_leaf_queue(struct airoha_gdm_port *port,
+static int airoha_tc_htb_alloc_leaf_queue(struct net_device *dev,
 					  struct tc_htb_qopt_offload *opt)
 {
 	u32 channel = TC_H_MIN(opt->classid) % AIROHA_NUM_QOS_CHANNELS;
 	u32 rate = div_u64(opt->rate, 1000) << 3; /* kbps */
-	struct net_device *dev = port->dev;
-	int num_tx_queues = dev->real_num_tx_queues;
-	int err;
+	int err, num_tx_queues = dev->real_num_tx_queues;
+	struct airoha_gdm_port *port = netdev_priv(dev);
 
 	if (opt->parent_classid != TC_HTB_CLASSID_ROOT) {
 		NL_SET_ERR_MSG_MOD(opt->extack, "invalid parent classid");
 		return -EINVAL;
 	}
 
-	err = airoha_qdma_set_tx_rate_limit(port, channel, rate, opt->quantum);
+	err = airoha_qdma_set_tx_rate_limit(dev, channel, rate, opt->quantum);
 	if (err) {
 		NL_SET_ERR_MSG_MOD(opt->extack,
 				   "failed configuring htb offload");
@@ -2541,7 +2541,7 @@ static int airoha_tc_htb_alloc_leaf_queue(struct airoha_gdm_port *port,
 
 	err = netif_set_real_num_tx_queues(dev, num_tx_queues + 1);
 	if (err) {
-		airoha_qdma_set_tx_rate_limit(port, channel, 0, opt->quantum);
+		airoha_qdma_set_tx_rate_limit(dev, channel, 0, opt->quantum);
 		NL_SET_ERR_MSG_MOD(opt->extack,
 				   "failed setting real_num_tx_queues");
 		return err;
@@ -2728,44 +2728,47 @@ static int airoha_dev_setup_tc_block(struct net_device *dev,
 	}
 }
 
-static void airoha_tc_remove_htb_queue(struct airoha_gdm_port *port, int queue)
+static void airoha_tc_remove_htb_queue(struct net_device *dev, int queue)
 {
-	struct net_device *dev = port->dev;
+	struct airoha_gdm_port *port = netdev_priv(dev);
 
 	netif_set_real_num_tx_queues(dev, dev->real_num_tx_queues - 1);
-	airoha_qdma_set_tx_rate_limit(port, queue + 1, 0, 0);
+	airoha_qdma_set_tx_rate_limit(dev, queue + 1, 0, 0);
 	clear_bit(queue, port->qos_sq_bmap);
 }
 
-static int airoha_tc_htb_delete_leaf_queue(struct airoha_gdm_port *port,
+static int airoha_tc_htb_delete_leaf_queue(struct net_device *dev,
 					   struct tc_htb_qopt_offload *opt)
 {
 	u32 channel = TC_H_MIN(opt->classid) % AIROHA_NUM_QOS_CHANNELS;
+	struct airoha_gdm_port *port = netdev_priv(dev);
 
 	if (!test_bit(channel, port->qos_sq_bmap)) {
 		NL_SET_ERR_MSG_MOD(opt->extack, "invalid queue id");
 		return -EINVAL;
 	}
 
-	airoha_tc_remove_htb_queue(port, channel);
+	airoha_tc_remove_htb_queue(dev, channel);
 
 	return 0;
 }
 
-static int airoha_tc_htb_destroy(struct airoha_gdm_port *port)
+static int airoha_tc_htb_destroy(struct net_device *dev)
 {
+	struct airoha_gdm_port *port = netdev_priv(dev);
 	int q;
 
 	for_each_set_bit(q, port->qos_sq_bmap, AIROHA_NUM_QOS_CHANNELS)
-		airoha_tc_remove_htb_queue(port, q);
+		airoha_tc_remove_htb_queue(dev, q);
 
 	return 0;
 }
 
-static int airoha_tc_get_htb_get_leaf_queue(struct airoha_gdm_port *port,
+static int airoha_tc_get_htb_get_leaf_queue(struct net_device *dev,
 					    struct tc_htb_qopt_offload *opt)
 {
 	u32 channel = TC_H_MIN(opt->classid) % AIROHA_NUM_QOS_CHANNELS;
+	struct airoha_gdm_port *port = netdev_priv(dev);
 
 	if (!test_bit(channel, port->qos_sq_bmap)) {
 		NL_SET_ERR_MSG_MOD(opt->extack, "invalid queue id");
@@ -2777,23 +2780,23 @@ static int airoha_tc_get_htb_get_leaf_queue(struct airoha_gdm_port *port,
 	return 0;
 }
 
-static int airoha_tc_setup_qdisc_htb(struct airoha_gdm_port *port,
+static int airoha_tc_setup_qdisc_htb(struct net_device *dev,
 				     struct tc_htb_qopt_offload *opt)
 {
 	switch (opt->command) {
 	case TC_HTB_CREATE:
 		break;
 	case TC_HTB_DESTROY:
-		return airoha_tc_htb_destroy(port);
+		return airoha_tc_htb_destroy(dev);
 	case TC_HTB_NODE_MODIFY:
 	case TC_HTB_LEAF_ALLOC_QUEUE:
-		return airoha_tc_htb_alloc_leaf_queue(port, opt);
+		return airoha_tc_htb_alloc_leaf_queue(dev, opt);
 	case TC_HTB_LEAF_DEL:
 	case TC_HTB_LEAF_DEL_LAST:
 	case TC_HTB_LEAF_DEL_LAST_FORCE:
-		return airoha_tc_htb_delete_leaf_queue(port, opt);
+		return airoha_tc_htb_delete_leaf_queue(dev, opt);
 	case TC_HTB_LEAF_QUERY_QUEUE:
-		return airoha_tc_get_htb_get_leaf_queue(port, opt);
+		return airoha_tc_get_htb_get_leaf_queue(dev, opt);
 	default:
 		return -EOPNOTSUPP;
 	}
@@ -2810,7 +2813,7 @@ static int airoha_dev_tc_setup(struct net_device *dev, enum tc_setup_type type,
 	case TC_SETUP_QDISC_ETS:
 		return airoha_tc_setup_qdisc_ets(port, type_data);
 	case TC_SETUP_QDISC_HTB:
-		return airoha_tc_setup_qdisc_htb(port, type_data);
+		return airoha_tc_setup_qdisc_htb(dev, type_data);
 	case TC_SETUP_BLOCK:
 	case TC_SETUP_FT:
 		return airoha_dev_setup_tc_block(dev, type_data);