[PATCH net-next v6 12/12] net: airoha: add phylink support
Lorenzo Bianconi
lorenzo at kernel.org
Tue Jun 9 08:29:44 PDT 2026
> Add phylink support for each GDM port. For GDM1 add the internal interface
> mode as the only supported mode. For GDM2/3/4 add the required
> 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 at gmail.com>
Hi Christian,
some nits inline.
Regards,
Lorenzo
> ---
> drivers/net/ethernet/airoha/Kconfig | 1 +
> drivers/net/ethernet/airoha/airoha_eth.c | 167 +++++++++++++++++++++-
> drivers/net/ethernet/airoha/airoha_eth.h | 3 +
> drivers/net/ethernet/airoha/airoha_regs.h | 12 ++
> 4 files changed, 181 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/net/ethernet/airoha/Kconfig b/drivers/net/ethernet/airoha/Kconfig
> index ad3ce501e7a5..38dcc76e5998 100644
> --- a/drivers/net/ethernet/airoha/Kconfig
> +++ b/drivers/net/ethernet/airoha/Kconfig
> @@ -20,6 +20,7 @@ config NET_AIROHA
> depends on NET_DSA || !NET_DSA
> select NET_AIROHA_NPU
> select PAGE_POOL
> + select PHYLINK
> help
> This driver supports the gigabit ethernet MACs in the
> Airoha SoC family.
> diff --git a/drivers/net/ethernet/airoha/airoha_eth.c b/drivers/net/ethernet/airoha/airoha_eth.c
> index 5a8e84fa9918..eabd7b058f82 100644
> --- a/drivers/net/ethernet/airoha/airoha_eth.c
> +++ b/drivers/net/ethernet/airoha/airoha_eth.c
> @@ -8,6 +8,7 @@
> #include <linux/of_reserved_mem.h>
> #include <linux/platform_device.h>
> #include <linux/tcp.h>
> +#include <linux/pcs/pcs.h>
Can you please respect the alphabetic order?
> #include <linux/u64_stats_sync.h>
> #include <net/dst_metadata.h>
> #include <net/page_pool/helpers.h>
> @@ -1779,6 +1780,15 @@ static int airoha_dev_open(struct net_device *netdev)
> u32 cur_len, pse_port = FE_PSE_PORT_PPE1;
> struct airoha_qdma *qdma = dev->qdma;
>
> + err = phylink_of_phy_connect(dev->phylink, netdev->dev.of_node, 0);
> + if (err) {
> + netdev_err(netdev, "%s: could not attach PHY: %d\n", __func__,
> + err);
Do we need specify the __func__ argument here?
> + return err;
> + }
> +
> + phylink_start(dev->phylink);
> +
> netif_tx_start_all_queues(netdev);
> err = airoha_set_vip_for_gdm_port(dev, true);
> if (err)
> @@ -1876,6 +1886,9 @@ static int airoha_dev_stop(struct net_device *netdev)
> }
> }
>
> + phylink_stop(dev->phylink);
> + phylink_disconnect_phy(dev->phylink);
> +
> return 0;
> }
>
> @@ -3148,6 +3161,153 @@ bool airoha_is_valid_gdm_dev(struct airoha_eth *eth,
> return false;
> }
>
> +/* Nothing to do in MAC, everything is handled in PCS */
> +static void airoha_mac_config(struct phylink_config *config, unsigned int mode,
> + const struct phylink_link_state *state)
> +{
> +}
> +
> +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_dev *dev = container_of(config, struct airoha_gdm_dev,
> + phylink_config);
> + struct airoha_gdm_port *port = dev->port;
> + struct airoha_eth *eth = dev->eth;
> + u32 frag_size_tx, frag_size_rx;
> + u32 mask, val;
> +
> + /* TX/RX frag is configured only for GDM4 */
> + if (port->id != 4)
if (port->id != AIROHA_GDM4_IDX)
...
> + return;
> +
> + 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 (dev->nbq == 1) {
> + mask = GDMA4_SGMII1_TX_FRAG_SIZE_MASK;
> + val = FIELD_PREP(GDMA4_SGMII1_TX_FRAG_SIZE_MASK,
> + frag_size_tx);
> + } else {
> + mask = GDMA4_SGMII0_TX_FRAG_SIZE_MASK;
> + val = FIELD_PREP(GDMA4_SGMII0_TX_FRAG_SIZE_MASK,
> + frag_size_tx);
> + }
> + airoha_fe_rmw(eth, REG_GDMA4_TMBI_FRAG, mask, val);
> +
> + if (dev->nbq == 1) {
> + mask = GDMA4_SGMII1_RX_FRAG_SIZE_MASK;
> + val = FIELD_PREP(GDMA4_SGMII1_RX_FRAG_SIZE_MASK,
> + frag_size_tx);
> + } else {
> + mask = GDMA4_SGMII0_RX_FRAG_SIZE_MASK;
> + val = FIELD_PREP(GDMA4_SGMII0_RX_FRAG_SIZE_MASK,
> + frag_size_tx);
> + }
> + airoha_fe_rmw(eth, REG_GDMA4_RMBI_FRAG, mask, val);
> +}
> +
> +/* Nothing to do in MAC, everything is handled in PCS */
> +static void airoha_mac_link_down(struct phylink_config *config, unsigned int mode,
> + phy_interface_t interface)
> +{
> +}
> +
> +static const struct phylink_mac_ops airoha_phylink_ops = {
> + .mac_config = airoha_mac_config,
> + .mac_link_up = airoha_mac_link_up,
> + .mac_link_down = airoha_mac_link_down,
> +};
> +
> +static int airoha_fill_available_pcs(struct phylink_config *config,
> + struct phylink_pcs **available_pcs,
> + unsigned int num_available_pcs)
> +{
> + struct device *dev = config->dev;
> +
> + return fwnode_phylink_pcs_parse(dev_fwnode(dev), available_pcs,
> + &num_available_pcs);
> +}
> +
> +static int airoha_setup_phylink(struct net_device *netdev)
> +{
> + struct airoha_gdm_dev *dev = netdev_priv(netdev);
> + struct device_node *np = netdev->dev.of_node;
> + struct airoha_gdm_port *port = dev->port;
> + struct phylink_config *config;
> + phy_interface_t phy_mode;
> + struct phylink *phylink;
> + int err;
> +
> + err = of_get_phy_mode(np, &phy_mode);
> + if (err) {
> + dev_err(&netdev->dev, "incorrect phy-mode\n");
> + return err;
> + }
> +
> + config = &dev->phylink_config;
remove new-line here.
> +
> + config->dev = &netdev->dev;
> + config->type = PHYLINK_NETDEV;
> + config->mac_capabilities = MAC_ASYM_PAUSE | MAC_SYM_PAUSE | MAC_10000FD;
> + if (port->id > AIROHA_GDM1_IDX)
maybe
if (port->id != AIROHA_GDM1_IDX)
...
> + config->mac_capabilities |= MAC_10 | MAC_100 | MAC_1000 |
> + MAC_2500FD | MAC_5000FD;
> +
> + err = fwnode_phylink_pcs_parse(dev_fwnode(&netdev->dev), NULL,
> + &config->num_available_pcs);
> + if (err)
> + return err;
> +
> + config->fill_available_pcs = airoha_fill_available_pcs;
> +
> + /*
> + * GDM1 only supports internal for Embedded Switch
> + * and doesn't require a PCS.
> + */
> + if (port->id == AIROHA_GDM1_IDX) {
> + __set_bit(PHY_INTERFACE_MODE_INTERNAL,
> + config->supported_interfaces);
> + } else {
> + __set_bit(PHY_INTERFACE_MODE_SGMII,
> + config->supported_interfaces);
> + __set_bit(PHY_INTERFACE_MODE_1000BASEX,
> + config->supported_interfaces);
> + __set_bit(PHY_INTERFACE_MODE_2500BASEX,
> + config->supported_interfaces);
> + __set_bit(PHY_INTERFACE_MODE_10GBASER,
> + config->supported_interfaces);
> + __set_bit(PHY_INTERFACE_MODE_USXGMII,
> + config->supported_interfaces);
> +
> + phy_interface_copy(config->pcs_interfaces,
> + config->supported_interfaces);
> + }
> +
> + phylink = phylink_create(config, of_fwnode_handle(np),
> + phy_mode, &airoha_phylink_ops);
> + if (IS_ERR(phylink))
> + return PTR_ERR(phylink);
> +
> + dev->phylink = phylink;
> +
> + return 0;
> +}
> +
> static int airoha_alloc_gdm_device(struct airoha_eth *eth,
> struct airoha_gdm_port *port,
> int nbq, struct device_node *np)
> @@ -3210,7 +3370,7 @@ static int airoha_alloc_gdm_device(struct airoha_eth *eth,
> dev->nbq = nbq;
> port->devs[index] = dev;
>
> - return 0;
> + return airoha_setup_phylink(netdev);
> }
>
> static int airoha_alloc_gdm_port(struct airoha_eth *eth,
> @@ -3435,8 +3595,10 @@ static int airoha_probe(struct platform_device *pdev)
> continue;
>
> netdev = netdev_from_priv(dev);
> - if (netdev->reg_state == NETREG_REGISTERED)
> + if (netdev->reg_state == NETREG_REGISTERED) {
> + phylink_destroy(dev->phylink);
> unregister_netdev(netdev);
> + }
> of_node_put(netdev->dev.of_node);
> }
> airoha_metadata_dst_free(port);
> @@ -3472,6 +3634,7 @@ static void airoha_remove(struct platform_device *pdev)
> continue;
>
> netdev = netdev_from_priv(dev);
> + phylink_destroy(dev->phylink);
> unregister_netdev(netdev);
> of_node_put(netdev->dev.of_node);
> }
> diff --git a/drivers/net/ethernet/airoha/airoha_eth.h b/drivers/net/ethernet/airoha/airoha_eth.h
> index 8f42973f9cf5..1b25603dc64d 100644
> --- a/drivers/net/ethernet/airoha/airoha_eth.h
> +++ b/drivers/net/ethernet/airoha/airoha_eth.h
> @@ -554,6 +554,9 @@ struct airoha_gdm_dev {
>
> u32 flags;
> int nbq;
> +
> + struct phylink *phylink;
> + struct phylink_config phylink_config;
> };
>
> struct airoha_gdm_port {
> diff --git a/drivers/net/ethernet/airoha/airoha_regs.h b/drivers/net/ethernet/airoha/airoha_regs.h
> index 436f3c8779c1..27f2583e143a 100644
> --- a/drivers/net/ethernet/airoha/airoha_regs.h
> +++ b/drivers/net/ethernet/airoha/airoha_regs.h
> @@ -358,6 +358,18 @@
> #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_MASK GENMASK(31, 26)
> +#define GDMA4_SGMII1_TX_FRAG_SIZE_MASK GENMASK(25, 16)
> +#define GDMA4_SGMII0_TX_WEIGHT_MASK GENMASK(15, 10)
> +#define GDMA4_SGMII0_TX_FRAG_SIZE_MASK GENMASK(9, 0)
> +
> +#define REG_GDMA4_RMBI_FRAG 0x202c
> +#define GDMA4_SGMII1_RX_WEIGHT_MASK GENMASK(31, 26)
> +#define GDMA4_SGMII1_RX_FRAG_SIZE_MASK GENMASK(25, 16)
> +#define GDMA4_SGMII0_RX_WEIGHT_MASK GENMASK(15, 10)
> +#define GDMA4_SGMII0_RX_FRAG_SIZE_MASK GENMASK(9, 0)
> +
> #define REG_MC_VLAN_EN 0x2100
> #define MC_VLAN_EN_MASK BIT(0)
>
> --
> 2.53.0
>
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