diff mbox series

[net-next,v5,3/9] net: stmmac: select PCS negotiation mode according to the interface mode

Message ID 20240215030500.3067426-4-yong.liang.choong@linux.intel.com (mailing list archive)
State New, archived
Headers show
Series Enable SGMII and 2500BASEX interface mode switching for Intel platforms | expand

Commit Message

Choong Yong Liang Feb. 15, 2024, 3:04 a.m. UTC 
The 'stmmac_get_pcs_neg_mode' is invoked during link initialization or
interface mode changes.

In cases where 'priv->plat->get_pcs_neg_mode' is absent, the default
'phylink_pcs_neg_mode' function is utilized.

Additionally, the 'intel_get_pcs_neg_mode' function is available to
determine the PCS negotiation mode based on the provided interface mode.

Signed-off-by: Choong Yong Liang <yong.liang.choong@linux.intel.com>
---
 .../net/ethernet/stmicro/stmmac/dwmac-intel.c | 48 +++++++++++++++----
 .../net/ethernet/stmicro/stmmac/stmmac_main.c | 17 +++++++
 include/linux/stmmac.h                        |  2 +
 3 files changed, 57 insertions(+), 10 deletions(-)
diff mbox series

Patch

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-intel.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-intel.c
index 60283543ffc8..6f12e80b8a05 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-intel.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-intel.c
@@ -414,6 +414,39 @@  static void intel_mgbe_pse_crossts_adj(struct intel_priv_data *intel_priv,
 	}
 }
 
+static bool is_fixed_link(struct pci_dev *pdev)
+{
+	struct fwnode_handle *fwnode = dev_fwnode(&pdev->dev);
+	bool is_fixed_link = false;
+
+	if (fwnode) {
+		struct fwnode_handle *fixed_node;
+
+		fixed_node = fwnode_get_named_child_node(fwnode, "fixed-link");
+		if (fixed_node)
+			is_fixed_link = true;
+
+		fwnode_handle_put(fixed_node);
+	}
+
+	return is_fixed_link;
+}
+
+static unsigned int intel_get_pcs_neg_mode(phy_interface_t interface,
+					   struct pci_dev *pdev)
+{
+	unsigned int neg_mode;
+
+	if ((interface == PHY_INTERFACE_MODE_SGMII ||
+	     interface == PHY_INTERFACE_MODE_1000BASEX) &&
+	     !is_fixed_link(pdev))
+		neg_mode = PHYLINK_PCS_NEG_INBAND_ENABLED;
+	else
+		neg_mode = PHYLINK_PCS_NEG_OUTBAND;
+
+	return neg_mode;
+}
+
 static void common_default_data(struct plat_stmmacenet_data *plat)
 {
 	plat->clk_csr = 2;	/* clk_csr_i = 20-35MHz & MDC = clk_csr_i/16 */
@@ -590,15 +623,8 @@  static int intel_mgbe_common_data(struct pci_dev *pdev,
 	}
 
 	/* For fixed-link setup, we clear xpcs_an_inband */
-	if (fwnode) {
-		struct fwnode_handle *fixed_node;
-
-		fixed_node = fwnode_get_named_child_node(fwnode, "fixed-link");
-		if (fixed_node)
-			plat->mdio_bus_data->xpcs_an_inband = false;
-
-		fwnode_handle_put(fixed_node);
-	}
+	if (is_fixed_link(pdev))
+		plat->mdio_bus_data->xpcs_an_inband = false;
 
 	/* Ensure mdio bus scan skips intel serdes and pcs-xpcs */
 	plat->mdio_bus_data->phy_mask = 1 << INTEL_MGBE_ADHOC_ADDR;
@@ -649,7 +675,7 @@  static int ehl_sgmii_data(struct pci_dev *pdev,
 	plat->speed_mode_2500 = intel_speed_mode_2500;
 	plat->serdes_powerup = intel_serdes_powerup;
 	plat->serdes_powerdown = intel_serdes_powerdown;
-
+	plat->get_pcs_neg_mode = intel_get_pcs_neg_mode;
 	plat->clk_ptp_rate = 204800000;
 
 	return ehl_common_data(pdev, plat);
@@ -708,6 +734,7 @@  static int ehl_pse0_sgmii1g_data(struct pci_dev *pdev,
 	plat->speed_mode_2500 = intel_speed_mode_2500;
 	plat->serdes_powerup = intel_serdes_powerup;
 	plat->serdes_powerdown = intel_serdes_powerdown;
+	plat->get_pcs_neg_mode = intel_get_pcs_neg_mode;
 	return ehl_pse0_common_data(pdev, plat);
 }
 
@@ -749,6 +776,7 @@  static int ehl_pse1_sgmii1g_data(struct pci_dev *pdev,
 	plat->speed_mode_2500 = intel_speed_mode_2500;
 	plat->serdes_powerup = intel_serdes_powerup;
 	plat->serdes_powerdown = intel_serdes_powerdown;
+	plat->get_pcs_neg_mode = intel_get_pcs_neg_mode;
 	return ehl_pse1_common_data(pdev, plat);
 }
 
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index ae2ffa9595d6..dbd16fc38888 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -1104,11 +1104,28 @@  static void stmmac_mac_link_up(struct phylink_config *config,
 		stmmac_hwtstamp_correct_latency(priv, priv);
 }
 
+static unsigned int stmmac_get_pcs_neg_mode(struct phylink_config *config,
+					    unsigned int mode,
+					    phy_interface_t interface,
+					    const unsigned long *advertising)
+{
+	struct stmmac_priv *priv = netdev_priv(to_net_dev(config->dev));
+	unsigned int neg_mode;
+
+	if (priv->plat->get_pcs_neg_mode)
+		neg_mode = priv->plat->get_pcs_neg_mode(interface, priv->plat->pdev);
+	else
+		neg_mode = phylink_pcs_neg_mode(mode, interface, advertising);
+
+	return neg_mode;
+}
+
 static const struct phylink_mac_ops stmmac_phylink_mac_ops = {
 	.mac_select_pcs = stmmac_mac_select_pcs,
 	.mac_config = stmmac_mac_config,
 	.mac_link_down = stmmac_mac_link_down,
 	.mac_link_up = stmmac_mac_link_up,
+	.mac_get_pcs_neg_mode = stmmac_get_pcs_neg_mode,
 };
 
 /**
diff --git a/include/linux/stmmac.h b/include/linux/stmmac.h
index dfa1828cd756..ffd66722eeda 100644
--- a/include/linux/stmmac.h
+++ b/include/linux/stmmac.h
@@ -277,6 +277,8 @@  struct plat_stmmacenet_data {
 	int (*serdes_powerup)(struct net_device *ndev, void *priv);
 	void (*serdes_powerdown)(struct net_device *ndev, void *priv);
 	void (*speed_mode_2500)(struct net_device *ndev, void *priv);
+	unsigned int (*get_pcs_neg_mode)(phy_interface_t interface,
+					 struct pci_dev *pdev);
 	void (*ptp_clk_freq_config)(struct stmmac_priv *priv);
 	int (*init)(struct platform_device *pdev, void *priv);
 	void (*exit)(struct platform_device *pdev, void *priv);