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[net-next PATCH v3 11/11] net: airoha: add phylink support for GDM2/3/4

Christian Marangi posted 11 patches 9 months ago
There is a newer version of this series
[net-next PATCH v3 11/11] net: airoha: add phylink support for GDM2/3/4
Posted by Christian Marangi 9 months ago 
Add phylink support for GDM2/3/4 port that require configuration of the
PCS to make the external PHY or attached SFP cage work.

These needs to be defined in the GDM port node using the pcs-handle
property.

Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
---
 drivers/net/ethernet/airoha/airoha_eth.c  | 138 ++++++++++++++++++++++
 drivers/net/ethernet/airoha/airoha_eth.h  |   3 +
 drivers/net/ethernet/airoha/airoha_regs.h |  12 ++
 3 files changed, 153 insertions(+)

diff --git a/drivers/net/ethernet/airoha/airoha_eth.c b/drivers/net/ethernet/airoha/airoha_eth.c
index 16c7896f931f..17521be820b5 100644
--- a/drivers/net/ethernet/airoha/airoha_eth.c
+++ b/drivers/net/ethernet/airoha/airoha_eth.c
@@ -7,6 +7,7 @@
 #include <linux/of_net.h>
 #include <linux/platform_device.h>
 #include <linux/tcp.h>
+#include <linux/pcs/pcs.h>
 #include <linux/u64_stats_sync.h>
 #include <net/dst_metadata.h>
 #include <net/page_pool/helpers.h>
@@ -79,6 +80,11 @@ static bool airhoa_is_lan_gdm_port(struct airoha_gdm_port *port)
 	return port->id == 1;
 }
 
+static bool airhoa_is_phy_external(struct airoha_gdm_port *port)
+{
+	return port->id != 1;
+}
+
 static void airoha_set_macaddr(struct airoha_gdm_port *port, const u8 *addr)
 {
 	struct airoha_eth *eth = port->qdma->eth;
@@ -1613,6 +1619,17 @@ static int airoha_dev_open(struct net_device *dev)
 	struct airoha_gdm_port *port = netdev_priv(dev);
 	struct airoha_qdma *qdma = port->qdma;
 
+	if (airhoa_is_phy_external(port)) {
+		err = phylink_of_phy_connect(port->phylink, dev->dev.of_node, 0);
+		if (err) {
+			netdev_err(dev, "%s: could not attach PHY: %d\n", __func__,
+				   err);
+			return err;
+		}
+
+		phylink_start(port->phylink);
+	}
+
 	netif_tx_start_all_queues(dev);
 	err = airoha_set_vip_for_gdm_port(port, true);
 	if (err)
@@ -1665,6 +1682,11 @@ static int airoha_dev_stop(struct net_device *dev)
 		}
 	}
 
+	if (airhoa_is_phy_external(port)) {
+		phylink_stop(port->phylink);
+		phylink_disconnect_phy(port->phylink);
+	}
+
 	return 0;
 }
 
@@ -2795,6 +2817,110 @@ bool airoha_is_valid_gdm_port(struct airoha_eth *eth,
 	return false;
 }
 
+static void airoha_mac_link_up(struct phylink_config *config, struct phy_device *phy,
+			       unsigned int mode, phy_interface_t interface,
+			       int speed, int duplex, bool tx_pause, bool rx_pause)
+{
+	struct airoha_gdm_port *port = container_of(config, struct airoha_gdm_port,
+						    phylink_config);
+	struct airoha_qdma *qdma = port->qdma;
+	struct airoha_eth *eth = qdma->eth;
+	u32 frag_size_tx, frag_size_rx;
+
+	switch (speed) {
+	case SPEED_10000:
+	case SPEED_5000:
+		frag_size_tx = 8;
+		frag_size_rx = 8;
+		break;
+	case SPEED_2500:
+		frag_size_tx = 2;
+		frag_size_rx = 1;
+		break;
+	default:
+		frag_size_tx = 1;
+		frag_size_rx = 0;
+	}
+
+	/* Configure TX/RX frag based on speed */
+	if (port->id == 4) {
+		airoha_fe_rmw(eth, REG_GDMA4_TMBI_FRAG, GDMA4_SGMII0_TX_FRAG_SIZE,
+			      FIELD_PREP(GDMA4_SGMII0_TX_FRAG_SIZE, frag_size_tx));
+
+		airoha_fe_rmw(eth, REG_GDMA4_RMBI_FRAG, GDMA4_SGMII0_RX_FRAG_SIZE,
+			      FIELD_PREP(GDMA4_SGMII0_RX_FRAG_SIZE, frag_size_rx));
+	}
+}
+
+static const struct phylink_mac_ops airoha_phylink_ops = {
+	.mac_link_up = airoha_mac_link_up,
+};
+
+static int airoha_setup_phylink(struct net_device *dev)
+{
+	struct airoha_gdm_port *port = netdev_priv(dev);
+	struct device_node *np = dev->dev.of_node;
+	struct phylink_pcs **available_pcs;
+	phy_interface_t phy_mode;
+	struct phylink *phylink;
+	unsigned int num_pcs;
+	int err;
+
+	err = of_get_phy_mode(np, &phy_mode);
+	if (err) {
+		dev_err(&dev->dev, "incorrect phy-mode\n");
+		return err;
+	}
+
+	port->phylink_config.dev = &dev->dev;
+	port->phylink_config.type = PHYLINK_NETDEV;
+	port->phylink_config.mac_capabilities = MAC_ASYM_PAUSE | MAC_SYM_PAUSE |
+						MAC_10 | MAC_100 | MAC_1000 | MAC_2500FD |
+						MAC_5000FD | MAC_10000FD;
+
+	err = fwnode_phylink_pcs_parse(dev_fwnode(&dev->dev), NULL, &num_pcs);
+	if (err)
+		return err;
+
+	available_pcs = kcalloc(num_pcs, sizeof(*available_pcs), GFP_KERNEL);
+	if (!available_pcs)
+		return -ENOMEM;
+
+	err = fwnode_phylink_pcs_parse(dev_fwnode(&dev->dev), available_pcs,
+				       &num_pcs);
+	if (err)
+		goto out;
+
+	port->phylink_config.available_pcs = available_pcs;
+	port->phylink_config.num_available_pcs = num_pcs;
+
+	__set_bit(PHY_INTERFACE_MODE_SGMII,
+		  port->phylink_config.supported_interfaces);
+	__set_bit(PHY_INTERFACE_MODE_1000BASEX,
+		  port->phylink_config.supported_interfaces);
+	__set_bit(PHY_INTERFACE_MODE_2500BASEX,
+		  port->phylink_config.supported_interfaces);
+	__set_bit(PHY_INTERFACE_MODE_USXGMII,
+		  port->phylink_config.supported_interfaces);
+
+	phy_interface_copy(port->phylink_config.pcs_interfaces,
+			   port->phylink_config.supported_interfaces);
+
+	phylink = phylink_create(&port->phylink_config,
+				 of_fwnode_handle(np),
+				 phy_mode, &airoha_phylink_ops);
+	if (IS_ERR(phylink)) {
+		err = PTR_ERR(phylink);
+		goto out;
+	}
+
+	port->phylink = phylink;
+out:
+	kfree(available_pcs);
+
+	return err;
+}
+
 static int airoha_alloc_gdm_port(struct airoha_eth *eth,
 				 struct device_node *np, int index)
 {
@@ -2873,6 +2999,12 @@ static int airoha_alloc_gdm_port(struct airoha_eth *eth,
 	if (err)
 		return err;
 
+	if (airhoa_is_phy_external(port)) {
+		err = airoha_setup_phylink(dev);
+		if (err)
+			return err;
+	}
+
 	return register_netdev(dev);
 }
 
@@ -2967,6 +3099,9 @@ static int airoha_probe(struct platform_device *pdev)
 		struct airoha_gdm_port *port = eth->ports[i];
 
 		if (port && port->dev->reg_state == NETREG_REGISTERED) {
+			if (airhoa_is_phy_external(port))
+				phylink_destroy(port->phylink);
+
 			unregister_netdev(port->dev);
 			airoha_metadata_dst_free(port);
 		}
@@ -2994,6 +3129,9 @@ static void airoha_remove(struct platform_device *pdev)
 			continue;
 
 		airoha_dev_stop(port->dev);
+		if (airhoa_is_phy_external(port))
+			phylink_destroy(port->phylink);
+
 		unregister_netdev(port->dev);
 		airoha_metadata_dst_free(port);
 	}
diff --git a/drivers/net/ethernet/airoha/airoha_eth.h b/drivers/net/ethernet/airoha/airoha_eth.h
index 53f39083a8b0..73a500474076 100644
--- a/drivers/net/ethernet/airoha/airoha_eth.h
+++ b/drivers/net/ethernet/airoha/airoha_eth.h
@@ -498,6 +498,9 @@ struct airoha_gdm_port {
 	struct net_device *dev;
 	int id;
 
+	struct phylink *phylink;
+	struct phylink_config phylink_config;
+
 	struct airoha_hw_stats stats;
 
 	DECLARE_BITMAP(qos_sq_bmap, AIROHA_NUM_QOS_CHANNELS);
diff --git a/drivers/net/ethernet/airoha/airoha_regs.h b/drivers/net/ethernet/airoha/airoha_regs.h
index d931530fc96f..71c63108f0a8 100644
--- a/drivers/net/ethernet/airoha/airoha_regs.h
+++ b/drivers/net/ethernet/airoha/airoha_regs.h
@@ -357,6 +357,18 @@
 #define IP_FRAGMENT_PORT_MASK		GENMASK(8, 5)
 #define IP_FRAGMENT_NBQ_MASK		GENMASK(4, 0)
 
+#define REG_GDMA4_TMBI_FRAG		0x2028
+#define GDMA4_SGMII1_TX_WEIGHT		GENMASK(31, 26)
+#define GDMA4_SGMII1_TX_FRAG_SIZE	GENMASK(25, 16)
+#define GDMA4_SGMII0_TX_WEIGHT		GENMASK(15, 10)
+#define GDMA4_SGMII0_TX_FRAG_SIZE	GENMASK(9, 0)
+
+#define REG_GDMA4_RMBI_FRAG		0x202c
+#define GDMA4_SGMII1_RX_WEIGHT		GENMASK(31, 26)
+#define GDMA4_SGMII1_RX_FRAG_SIZE	GENMASK(25, 16)
+#define GDMA4_SGMII0_RX_WEIGHT		GENMASK(15, 10)
+#define GDMA4_SGMII0_RX_FRAG_SIZE	GENMASK(9, 0)
+
 #define REG_MC_VLAN_EN			0x2100
 #define MC_VLAN_EN_MASK			BIT(0)
 
-- 
2.48.1
Re: [net-next PATCH v3 11/11] net: airoha: add phylink support for GDM2/3/4
Posted by kernel test robot 9 months ago 
Hi Christian,

kernel test robot noticed the following build warnings:

[auto build test WARNING on net-next/main]

url:    https://github.com/intel-lab-lkp/linux/commits/Christian-Marangi/net-phylink-keep-and-use-MAC-supported_interfaces-in-phylink-struct/20250510-182833
base:   net-next/main
patch link:    https://lore.kernel.org/r/20250510102348.14134-12-ansuelsmth%40gmail.com
patch subject: [net-next PATCH v3 11/11] net: airoha: add phylink support for GDM2/3/4
config: sh-randconfig-002-20250510 (https://download.01.org/0day-ci/archive/20250511/202505110156.WGym4cxS-lkp@intel.com/config)
compiler: sh4-linux-gcc (GCC) 11.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250511/202505110156.WGym4cxS-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202505110156.WGym4cxS-lkp@intel.com/

All warnings (new ones prefixed by >>):

   In file included from drivers/net/ethernet/airoha/airoha_eth.c:10:
>> include/linux/pcs/pcs.h:90:1: warning: 'fwnode_phylink_pcs_get_from_fwnode' defined but not used [-Wunused-function]
      90 | fwnode_phylink_pcs_get_from_fwnode(struct fwnode_handle *fwnode,
         | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>> include/linux/pcs/pcs.h:78:12: warning: 'register_fwnode_pcs_notifier' defined but not used [-Wunused-function]
      78 | static int register_fwnode_pcs_notifier(struct notifier_block *nb)
         |            ^~~~~~~~~~~~~~~~~~~~~~~~~~~~


vim +/fwnode_phylink_pcs_get_from_fwnode +90 include/linux/pcs/pcs.h

91110a42083f1a Christian Marangi 2025-05-10  24  
90fbe52edd2a1f Christian Marangi 2025-05-10  25  /**
90fbe52edd2a1f Christian Marangi 2025-05-10  26   * fwnode_pcs_get - Retrieves a PCS from a firmware node
90fbe52edd2a1f Christian Marangi 2025-05-10  27   * @fwnode: firmware node
90fbe52edd2a1f Christian Marangi 2025-05-10  28   * @index: index fwnode PCS handle in firmware node
90fbe52edd2a1f Christian Marangi 2025-05-10  29   *
90fbe52edd2a1f Christian Marangi 2025-05-10  30   * Get a PCS from the firmware node at index.
90fbe52edd2a1f Christian Marangi 2025-05-10  31   *
90fbe52edd2a1f Christian Marangi 2025-05-10  32   * Returns a pointer to the phylink_pcs or a negative
90fbe52edd2a1f Christian Marangi 2025-05-10  33   * error pointer. Can return -EPROBE_DEFER if the PCS is not
90fbe52edd2a1f Christian Marangi 2025-05-10  34   * present in global providers list (either due to driver
90fbe52edd2a1f Christian Marangi 2025-05-10  35   * still needs to be probed or it failed to probe/removed)
90fbe52edd2a1f Christian Marangi 2025-05-10  36   */
90fbe52edd2a1f Christian Marangi 2025-05-10  37  struct phylink_pcs *fwnode_pcs_get(struct fwnode_handle *fwnode,
90fbe52edd2a1f Christian Marangi 2025-05-10  38  				   int index);
90fbe52edd2a1f Christian Marangi 2025-05-10  39  
91110a42083f1a Christian Marangi 2025-05-10  40  /**
91110a42083f1a Christian Marangi 2025-05-10  41   * fwnode_phylink_pcs_get_from_fwnode - Retrieves the PCS provided
91110a42083f1a Christian Marangi 2025-05-10  42   *					by the firmware node from a
91110a42083f1a Christian Marangi 2025-05-10  43   *					firmware node
91110a42083f1a Christian Marangi 2025-05-10  44   * @fwnode: firmware node
91110a42083f1a Christian Marangi 2025-05-10  45   * @pcs_fwnode: PCS firmware node
91110a42083f1a Christian Marangi 2025-05-10  46   *
91110a42083f1a Christian Marangi 2025-05-10  47   * Parse 'pcs-handle' in 'fwnode' and get the PCS that match
91110a42083f1a Christian Marangi 2025-05-10  48   * 'pcs_fwnode' firmware node.
91110a42083f1a Christian Marangi 2025-05-10  49   *
91110a42083f1a Christian Marangi 2025-05-10  50   * Returns a pointer to the phylink_pcs or a negative
91110a42083f1a Christian Marangi 2025-05-10  51   * error pointer. Can return -EPROBE_DEFER if the PCS is not
91110a42083f1a Christian Marangi 2025-05-10  52   * present in global providers list (either due to driver
91110a42083f1a Christian Marangi 2025-05-10  53   * still needs to be probed or it failed to probe/removed)
91110a42083f1a Christian Marangi 2025-05-10  54   */
91110a42083f1a Christian Marangi 2025-05-10  55  struct phylink_pcs *
91110a42083f1a Christian Marangi 2025-05-10  56  fwnode_phylink_pcs_get_from_fwnode(struct fwnode_handle *fwnode,
91110a42083f1a Christian Marangi 2025-05-10  57  				   struct fwnode_handle *pcs_fwnode);
91110a42083f1a Christian Marangi 2025-05-10  58  
90fbe52edd2a1f Christian Marangi 2025-05-10  59  /**
90fbe52edd2a1f Christian Marangi 2025-05-10  60   * fwnode_phylink_pcs_parse - generic PCS parse for fwnode PCS provider
90fbe52edd2a1f Christian Marangi 2025-05-10  61   * @fwnode: firmware node
90fbe52edd2a1f Christian Marangi 2025-05-10  62   * @available_pcs: pointer to preallocated array of PCS
90fbe52edd2a1f Christian Marangi 2025-05-10  63   * @num_pcs: where to store count of parsed PCS
90fbe52edd2a1f Christian Marangi 2025-05-10  64   *
90fbe52edd2a1f Christian Marangi 2025-05-10  65   * Generic helper function to fill available_pcs array with PCS parsed
90fbe52edd2a1f Christian Marangi 2025-05-10  66   * from a "pcs-handle" fwnode property defined in firmware node up to
90fbe52edd2a1f Christian Marangi 2025-05-10  67   * passed num_pcs.
90fbe52edd2a1f Christian Marangi 2025-05-10  68   *
90fbe52edd2a1f Christian Marangi 2025-05-10  69   * If available_pcs is NULL, num_pcs is updated with the count of the
90fbe52edd2a1f Christian Marangi 2025-05-10  70   * parsed PCS.
90fbe52edd2a1f Christian Marangi 2025-05-10  71   *
90fbe52edd2a1f Christian Marangi 2025-05-10  72   * Returns 0 or a negative error.
90fbe52edd2a1f Christian Marangi 2025-05-10  73   */
90fbe52edd2a1f Christian Marangi 2025-05-10  74  int fwnode_phylink_pcs_parse(struct fwnode_handle *fwnode,
90fbe52edd2a1f Christian Marangi 2025-05-10  75  			     struct phylink_pcs **available_pcs,
90fbe52edd2a1f Christian Marangi 2025-05-10  76  			     unsigned int *num_pcs);
90fbe52edd2a1f Christian Marangi 2025-05-10  77  #else
91110a42083f1a Christian Marangi 2025-05-10 @78  static int register_fwnode_pcs_notifier(struct notifier_block *nb)
91110a42083f1a Christian Marangi 2025-05-10  79  {
91110a42083f1a Christian Marangi 2025-05-10  80  	return -EOPNOTSUPP;
91110a42083f1a Christian Marangi 2025-05-10  81  }
91110a42083f1a Christian Marangi 2025-05-10  82  
90fbe52edd2a1f Christian Marangi 2025-05-10  83  static inline struct phylink_pcs *fwnode_pcs_get(struct fwnode_handle *fwnode,
90fbe52edd2a1f Christian Marangi 2025-05-10  84  						 int index)
90fbe52edd2a1f Christian Marangi 2025-05-10  85  {
90fbe52edd2a1f Christian Marangi 2025-05-10  86  	return ERR_PTR(-ENOENT);
90fbe52edd2a1f Christian Marangi 2025-05-10  87  }
90fbe52edd2a1f Christian Marangi 2025-05-10  88  
91110a42083f1a Christian Marangi 2025-05-10  89  static struct phylink_pcs *
91110a42083f1a Christian Marangi 2025-05-10 @90  fwnode_phylink_pcs_get_from_fwnode(struct fwnode_handle *fwnode,
91110a42083f1a Christian Marangi 2025-05-10  91  				   struct fwnode_handle *pcs_fwnode)
91110a42083f1a Christian Marangi 2025-05-10  92  {
91110a42083f1a Christian Marangi 2025-05-10  93  	return ERR_PTR(-ENOENT);
91110a42083f1a Christian Marangi 2025-05-10  94  }
91110a42083f1a Christian Marangi 2025-05-10  95  

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
Re: [net-next PATCH v3 11/11] net: airoha: add phylink support for GDM2/3/4
Posted by Lorenzo Bianconi 9 months ago 
> Add phylink support for GDM2/3/4 port that require configuration of the
> PCS to make the external PHY or attached SFP cage work.
> 
> These needs to be defined in the GDM port node using the pcs-handle
> property.

Hi Christian,

thx for the patch. Some comments inline.

Regards,
Lorenzo

> 
> Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
> ---
>  drivers/net/ethernet/airoha/airoha_eth.c  | 138 ++++++++++++++++++++++
>  drivers/net/ethernet/airoha/airoha_eth.h  |   3 +
>  drivers/net/ethernet/airoha/airoha_regs.h |  12 ++
>  3 files changed, 153 insertions(+)
> 
> diff --git a/drivers/net/ethernet/airoha/airoha_eth.c b/drivers/net/ethernet/airoha/airoha_eth.c
> index 16c7896f931f..17521be820b5 100644
> --- a/drivers/net/ethernet/airoha/airoha_eth.c
> +++ b/drivers/net/ethernet/airoha/airoha_eth.c
> @@ -7,6 +7,7 @@
>  #include <linux/of_net.h>
>  #include <linux/platform_device.h>
>  #include <linux/tcp.h>
> +#include <linux/pcs/pcs.h>
>  #include <linux/u64_stats_sync.h>
>  #include <net/dst_metadata.h>
>  #include <net/page_pool/helpers.h>
> @@ -79,6 +80,11 @@ static bool airhoa_is_lan_gdm_port(struct airoha_gdm_port *port)
>  	return port->id == 1;
>  }
>  
> +static bool airhoa_is_phy_external(struct airoha_gdm_port *port)
> +{
> +	return port->id != 1;
> +}
> +
>  static void airoha_set_macaddr(struct airoha_gdm_port *port, const u8 *addr)
>  {
>  	struct airoha_eth *eth = port->qdma->eth;
> @@ -1613,6 +1619,17 @@ static int airoha_dev_open(struct net_device *dev)
>  	struct airoha_gdm_port *port = netdev_priv(dev);
>  	struct airoha_qdma *qdma = port->qdma;
>  
> +	if (airhoa_is_phy_external(port)) {
> +		err = phylink_of_phy_connect(port->phylink, dev->dev.of_node, 0);
> +		if (err) {
> +			netdev_err(dev, "%s: could not attach PHY: %d\n", __func__,
> +				   err);
> +			return err;
> +		}
> +
> +		phylink_start(port->phylink);
> +	}
> +
>  	netif_tx_start_all_queues(dev);
>  	err = airoha_set_vip_for_gdm_port(port, true);
>  	if (err)
> @@ -1665,6 +1682,11 @@ static int airoha_dev_stop(struct net_device *dev)
>  		}
>  	}
>  
> +	if (airhoa_is_phy_external(port)) {
> +		phylink_stop(port->phylink);
> +		phylink_disconnect_phy(port->phylink);
> +	}
> +
>  	return 0;
>  }
>  
> @@ -2795,6 +2817,110 @@ bool airoha_is_valid_gdm_port(struct airoha_eth *eth,
>  	return false;
>  }
>  
> +static void airoha_mac_link_up(struct phylink_config *config, struct phy_device *phy,
> +			       unsigned int mode, phy_interface_t interface,
> +			       int speed, int duplex, bool tx_pause, bool rx_pause)
> +{
> +	struct airoha_gdm_port *port = container_of(config, struct airoha_gdm_port,
> +						    phylink_config);
> +	struct airoha_qdma *qdma = port->qdma;
> +	struct airoha_eth *eth = qdma->eth;
> +	u32 frag_size_tx, frag_size_rx;

I guess we can just return here if port->id != 4 and avoid setting
frag_size_tx/frag_size_rx

> +
> +	switch (speed) {
> +	case SPEED_10000:
> +	case SPEED_5000:
> +		frag_size_tx = 8;
> +		frag_size_rx = 8;
> +		break;
> +	case SPEED_2500:
> +		frag_size_tx = 2;
> +		frag_size_rx = 1;
> +		break;
> +	default:
> +		frag_size_tx = 1;
> +		frag_size_rx = 0;
> +	}
> +
> +	/* Configure TX/RX frag based on speed */
> +	if (port->id == 4) {
> +		airoha_fe_rmw(eth, REG_GDMA4_TMBI_FRAG, GDMA4_SGMII0_TX_FRAG_SIZE,
> +			      FIELD_PREP(GDMA4_SGMII0_TX_FRAG_SIZE, frag_size_tx));
> +
> +		airoha_fe_rmw(eth, REG_GDMA4_RMBI_FRAG, GDMA4_SGMII0_RX_FRAG_SIZE,
> +			      FIELD_PREP(GDMA4_SGMII0_RX_FRAG_SIZE, frag_size_rx));
> +	}
> +}
> +
> +static const struct phylink_mac_ops airoha_phylink_ops = {
> +	.mac_link_up = airoha_mac_link_up,
> +};
> +
> +static int airoha_setup_phylink(struct net_device *dev)
> +{
> +	struct airoha_gdm_port *port = netdev_priv(dev);
> +	struct device_node *np = dev->dev.of_node;
> +	struct phylink_pcs **available_pcs;
> +	phy_interface_t phy_mode;
> +	struct phylink *phylink;
> +	unsigned int num_pcs;
> +	int err;
> +
> +	err = of_get_phy_mode(np, &phy_mode);
> +	if (err) {
> +		dev_err(&dev->dev, "incorrect phy-mode\n");
> +		return err;
> +	}
> +
> +	port->phylink_config.dev = &dev->dev;
> +	port->phylink_config.type = PHYLINK_NETDEV;
> +	port->phylink_config.mac_capabilities = MAC_ASYM_PAUSE | MAC_SYM_PAUSE |
> +						MAC_10 | MAC_100 | MAC_1000 | MAC_2500FD |
> +						MAC_5000FD | MAC_10000FD;
> +
> +	err = fwnode_phylink_pcs_parse(dev_fwnode(&dev->dev), NULL, &num_pcs);
> +	if (err)
> +		return err;
> +
> +	available_pcs = kcalloc(num_pcs, sizeof(*available_pcs), GFP_KERNEL);
> +	if (!available_pcs)
> +		return -ENOMEM;

since airoha_setup_phylink() is just run in the following path:

airoha_probe() -> airoha_alloc_gdm_port()

we can use devm_kcalloc() and get rid of the kfree and the end of the routine.

> +
> +	err = fwnode_phylink_pcs_parse(dev_fwnode(&dev->dev), available_pcs,
> +				       &num_pcs);
> +	if (err)
> +		goto out;
> +
> +	port->phylink_config.available_pcs = available_pcs;
> +	port->phylink_config.num_available_pcs = num_pcs;
> +
> +	__set_bit(PHY_INTERFACE_MODE_SGMII,
> +		  port->phylink_config.supported_interfaces);
> +	__set_bit(PHY_INTERFACE_MODE_1000BASEX,
> +		  port->phylink_config.supported_interfaces);
> +	__set_bit(PHY_INTERFACE_MODE_2500BASEX,
> +		  port->phylink_config.supported_interfaces);
> +	__set_bit(PHY_INTERFACE_MODE_USXGMII,
> +		  port->phylink_config.supported_interfaces);
> +
> +	phy_interface_copy(port->phylink_config.pcs_interfaces,
> +			   port->phylink_config.supported_interfaces);
> +
> +	phylink = phylink_create(&port->phylink_config,
> +				 of_fwnode_handle(np),
> +				 phy_mode, &airoha_phylink_ops);
> +	if (IS_ERR(phylink)) {
> +		err = PTR_ERR(phylink);
> +		goto out;
> +	}
> +
> +	port->phylink = phylink;
> +out:
> +	kfree(available_pcs);
> +
> +	return err;
> +}
> +
>  static int airoha_alloc_gdm_port(struct airoha_eth *eth,
>  				 struct device_node *np, int index)
>  {
> @@ -2873,6 +2999,12 @@ static int airoha_alloc_gdm_port(struct airoha_eth *eth,
>  	if (err)
>  		return err;
>  
> +	if (airhoa_is_phy_external(port)) {
> +		err = airoha_setup_phylink(dev);
> +		if (err)
> +			return err;
> +	}
> +
>  	return register_netdev(dev);

we should run phylink_destroy() if register_netdev() fails. Please take a
look to:

https://lore.kernel.org/netdev/aB8MPkMYXWvoaA03@lore-desk/T/#m0a036b0759384a38d2518025db46306858b5707b

>  }
>  
> @@ -2967,6 +3099,9 @@ static int airoha_probe(struct platform_device *pdev)
>  		struct airoha_gdm_port *port = eth->ports[i];
>  
>  		if (port && port->dev->reg_state == NETREG_REGISTERED) {
> +			if (airhoa_is_phy_external(port))
> +				phylink_destroy(port->phylink);
> +
>  			unregister_netdev(port->dev);
>  			airoha_metadata_dst_free(port);
>  		}
> @@ -2994,6 +3129,9 @@ static void airoha_remove(struct platform_device *pdev)
>  			continue;
>  
>  		airoha_dev_stop(port->dev);
> +		if (airhoa_is_phy_external(port))
> +			phylink_destroy(port->phylink);
> +
>  		unregister_netdev(port->dev);
>  		airoha_metadata_dst_free(port);
>  	}
> diff --git a/drivers/net/ethernet/airoha/airoha_eth.h b/drivers/net/ethernet/airoha/airoha_eth.h
> index 53f39083a8b0..73a500474076 100644
> --- a/drivers/net/ethernet/airoha/airoha_eth.h
> +++ b/drivers/net/ethernet/airoha/airoha_eth.h
> @@ -498,6 +498,9 @@ struct airoha_gdm_port {
>  	struct net_device *dev;
>  	int id;
>  
> +	struct phylink *phylink;
> +	struct phylink_config phylink_config;
> +
>  	struct airoha_hw_stats stats;
>  
>  	DECLARE_BITMAP(qos_sq_bmap, AIROHA_NUM_QOS_CHANNELS);
> diff --git a/drivers/net/ethernet/airoha/airoha_regs.h b/drivers/net/ethernet/airoha/airoha_regs.h
> index d931530fc96f..71c63108f0a8 100644
> --- a/drivers/net/ethernet/airoha/airoha_regs.h
> +++ b/drivers/net/ethernet/airoha/airoha_regs.h
> @@ -357,6 +357,18 @@
>  #define IP_FRAGMENT_PORT_MASK		GENMASK(8, 5)
>  #define IP_FRAGMENT_NBQ_MASK		GENMASK(4, 0)
>  
> +#define REG_GDMA4_TMBI_FRAG		0x2028
> +#define GDMA4_SGMII1_TX_WEIGHT		GENMASK(31, 26)
> +#define GDMA4_SGMII1_TX_FRAG_SIZE	GENMASK(25, 16)
> +#define GDMA4_SGMII0_TX_WEIGHT		GENMASK(15, 10)
> +#define GDMA4_SGMII0_TX_FRAG_SIZE	GENMASK(9, 0)

in order to be consistent with the codebase, can you please add _MASK suffix
here?

> +
> +#define REG_GDMA4_RMBI_FRAG		0x202c
> +#define GDMA4_SGMII1_RX_WEIGHT		GENMASK(31, 26)
> +#define GDMA4_SGMII1_RX_FRAG_SIZE	GENMASK(25, 16)
> +#define GDMA4_SGMII0_RX_WEIGHT		GENMASK(15, 10)
> +#define GDMA4_SGMII0_RX_FRAG_SIZE	GENMASK(9, 0)
> +
>  #define REG_MC_VLAN_EN			0x2100
>  #define MC_VLAN_EN_MASK			BIT(0)
>  
> -- 
> 2.48.1
>

Patchew 2.1-devel-b67e4c2

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